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Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-post-merge-2.6

Browse Source 
* git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-post-merge-2.6:
  [SCSI] target: Add LIO target core v4.0.0-rc6
  [SCSI] sd,sr: kill compat SDEV_MEDIA_CHANGE event
  [SCSI] sd: implement sd_check_events()
This commit is contained in:
Linus Torvalds 2011-01-14 16:29:49 -08:00
commit 38567333a6
47 changed files with 30571 additions and 58 deletions
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1094
Documentation/target/tcm_mod_builder.py Executable file
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145
Documentation/target/tcm_mod_builder.txt Normal file
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@ -0,0 +1,145 @@
>>>>>>>>>> The TCM v4 fabric module script generator <<<<<<<<<<
Greetings all,
This document is intended to be a mini-HOWTO for using the tcm_mod_builder.py
script to generate a brand new functional TCM v4 fabric .ko module of your very own,
that once built can be immediately be loaded to start access the new TCM/ConfigFS
fabric skeleton, by simply using:
modprobe $TCM_NEW_MOD
mkdir -p /sys/kernel/config/target/$TCM_NEW_MOD
This script will create a new drivers/target/$TCM_NEW_MOD/, and will do the following
*) Generate new API callers for drivers/target/target_core_fabric_configs.c logic
->make_nodeacl(), ->drop_nodeacl(), ->make_tpg(), ->drop_tpg()
->make_wwn(), ->drop_wwn(). These are created into $TCM_NEW_MOD/$TCM_NEW_MOD_configfs.c
*) Generate basic infrastructure for loading/unloading LKMs and TCM/ConfigFS fabric module
using a skeleton struct target_core_fabric_ops API template.
*) Based on user defined T10 Proto_Ident for the new fabric module being built,
the TransportID / Initiator and Target WWPN related handlers for
SPC-3 persistent reservation are automatically generated in $TCM_NEW_MOD/$TCM_NEW_MOD_fabric.c
using drivers/target/target_core_fabric_lib.c logic.
*) NOP API calls for all other Data I/O path and fabric dependent attribute logic
in $TCM_NEW_MOD/$TCM_NEW_MOD_fabric.c
tcm_mod_builder.py depends upon the mandatory '-p $PROTO_IDENT' and '-m
$FABRIC_MOD_name' parameters, and actually running the script looks like:
target:/mnt/sdb/lio-core-2.6.git/Documentation/target# python tcm_mod_builder.py -p iSCSI -m tcm_nab5000
tcm_dir: /mnt/sdb/lio-core-2.6.git/Documentation/target/../../
Set fabric_mod_name: tcm_nab5000
Set fabric_mod_dir:
/mnt/sdb/lio-core-2.6.git/Documentation/target/../../drivers/target/tcm_nab5000
Using proto_ident: iSCSI
Creating fabric_mod_dir:
/mnt/sdb/lio-core-2.6.git/Documentation/target/../../drivers/target/tcm_nab5000
Writing file:
/mnt/sdb/lio-core-2.6.git/Documentation/target/../../drivers/target/tcm_nab5000/tcm_nab5000_base.h
Using tcm_mod_scan_fabric_ops:
/mnt/sdb/lio-core-2.6.git/Documentation/target/../../include/target/target_core_fabric_ops.h
Writing file:
/mnt/sdb/lio-core-2.6.git/Documentation/target/../../drivers/target/tcm_nab5000/tcm_nab5000_fabric.c
Writing file:
/mnt/sdb/lio-core-2.6.git/Documentation/target/../../drivers/target/tcm_nab5000/tcm_nab5000_fabric.h
Writing file:
/mnt/sdb/lio-core-2.6.git/Documentation/target/../../drivers/target/tcm_nab5000/tcm_nab5000_configfs.c
Writing file:
/mnt/sdb/lio-core-2.6.git/Documentation/target/../../drivers/target/tcm_nab5000/Kbuild
Writing file:
/mnt/sdb/lio-core-2.6.git/Documentation/target/../../drivers/target/tcm_nab5000/Kconfig
Would you like to add tcm_nab5000to drivers/target/Kbuild..? [yes,no]: yes
Would you like to add tcm_nab5000to drivers/target/Kconfig..? [yes,no]: yes
At the end of tcm_mod_builder.py. the script will ask to add the following
line to drivers/target/Kbuild:
obj-$(CONFIG_TCM_NAB5000) += tcm_nab5000/
and the same for drivers/target/Kconfig:
source "drivers/target/tcm_nab5000/Kconfig"
*) Run 'make menuconfig' and select the new CONFIG_TCM_NAB5000 item:
<M> TCM_NAB5000 fabric module
*) Build using 'make modules', once completed you will have:
target:/mnt/sdb/lio-core-2.6.git# ls -la drivers/target/tcm_nab5000/
total 1348
drwxr-xr-x 2 root root 4096 2010-10-05 03:23 .
drwxr-xr-x 9 root root 4096 2010-10-05 03:22 ..
-rw-r--r-- 1 root root 282 2010-10-05 03:22 Kbuild
-rw-r--r-- 1 root root 171 2010-10-05 03:22 Kconfig
-rw-r--r-- 1 root root 49 2010-10-05 03:23 modules.order
-rw-r--r-- 1 root root 738 2010-10-05 03:22 tcm_nab5000_base.h
-rw-r--r-- 1 root root 9096 2010-10-05 03:22 tcm_nab5000_configfs.c
-rw-r--r-- 1 root root 191200 2010-10-05 03:23 tcm_nab5000_configfs.o
-rw-r--r-- 1 root root 40504 2010-10-05 03:23 .tcm_nab5000_configfs.o.cmd
-rw-r--r-- 1 root root 5414 2010-10-05 03:22 tcm_nab5000_fabric.c
-rw-r--r-- 1 root root 2016 2010-10-05 03:22 tcm_nab5000_fabric.h
-rw-r--r-- 1 root root 190932 2010-10-05 03:23 tcm_nab5000_fabric.o
-rw-r--r-- 1 root root 40713 2010-10-05 03:23 .tcm_nab5000_fabric.o.cmd
-rw-r--r-- 1 root root 401861 2010-10-05 03:23 tcm_nab5000.ko
-rw-r--r-- 1 root root 265 2010-10-05 03:23 .tcm_nab5000.ko.cmd
-rw-r--r-- 1 root root 459 2010-10-05 03:23 tcm_nab5000.mod.c
-rw-r--r-- 1 root root 23896 2010-10-05 03:23 tcm_nab5000.mod.o
-rw-r--r-- 1 root root 22655 2010-10-05 03:23 .tcm_nab5000.mod.o.cmd
-rw-r--r-- 1 root root 379022 2010-10-05 03:23 tcm_nab5000.o
-rw-r--r-- 1 root root 211 2010-10-05 03:23 .tcm_nab5000.o.cmd
*) Load the new module, create a lun_0 configfs group, and add new TCM Core
IBLOCK backstore symlink to port:
target:/mnt/sdb/lio-core-2.6.git# insmod drivers/target/tcm_nab5000.ko
target:/mnt/sdb/lio-core-2.6.git# mkdir -p /sys/kernel/config/target/nab5000/iqn.foo/tpgt_1/lun/lun_0
target:/mnt/sdb/lio-core-2.6.git# cd /sys/kernel/config/target/nab5000/iqn.foo/tpgt_1/lun/lun_0/
target:/sys/kernel/config/target/nab5000/iqn.foo/tpgt_1/lun/lun_0# ln -s /sys/kernel/config/target/core/iblock_0/lvm_test0 nab5000_port
target:/sys/kernel/config/target/nab5000/iqn.foo/tpgt_1/lun/lun_0# cd -
target:/mnt/sdb/lio-core-2.6.git# tree /sys/kernel/config/target/nab5000/
/sys/kernel/config/target/nab5000/
|-- discovery_auth
|-- iqn.foo
| `-- tpgt_1
| |-- acls
| |-- attrib
| |-- lun
| | `-- lun_0
| | |-- alua_tg_pt_gp
| | |-- alua_tg_pt_offline
| | |-- alua_tg_pt_status
| | |-- alua_tg_pt_write_md
| | `-- nab5000_port -> ../../../../../../target/core/iblock_0/lvm_test0
| |-- np
| `-- param
`-- version
target:/mnt/sdb/lio-core-2.6.git# lsmod
Module Size Used by
tcm_nab5000 3935 4
iscsi_target_mod 193211 0
target_core_stgt 8090 0
target_core_pscsi 11122 1
target_core_file 9172 2
target_core_iblock 9280 1
target_core_mod 228575 31
tcm_nab5000,iscsi_target_mod,target_core_stgt,target_core_pscsi,target_core_file,target_core_iblock
libfc 73681 0
scsi_debug 56265 0
scsi_tgt 8666 1 target_core_stgt
configfs 20644 2 target_core_mod
----------------------------------------------------------------------
Future TODO items:
*) Add more T10 proto_idents
*) Make tcm_mod_dump_fabric_ops() smarter and generate function pointer
defs directly from include/target/target_core_fabric_ops.h:struct target_core_fabric_ops
structure members.
October 5th, 2010
Nicholas A. Bellinger <nab@linux-iscsi.org>

2
drivers/Kconfig
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@ -26,6 +26,8 @@ source "drivers/ata/Kconfig"
source "drivers/md/Kconfig"
source "drivers/target/Kconfig"
source "drivers/message/fusion/Kconfig"
source "drivers/firewire/Kconfig"

1
drivers/Makefile
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@ -46,6 +46,7 @@ obj-y += macintosh/
obj-$(CONFIG_IDE) += ide/
obj-$(CONFIG_SCSI) += scsi/
obj-$(CONFIG_ATA) += ata/
obj-$(CONFIG_TARGET_CORE) += target/
obj-$(CONFIG_MTD) += mtd/
obj-$(CONFIG_SPI) += spi/
obj-y += net/

103
drivers/scsi/sd.c
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@ -990,30 +990,51 @@ out:
static void set_media_not_present(struct scsi_disk *sdkp)
{
sdkp->media_present = 0;
sdkp->capacity = 0;
sdkp->device->changed = 1;
if (sdkp->media_present)
sdkp->device->changed = 1;
if (sdkp->device->removable) {
sdkp->media_present = 0;
sdkp->capacity = 0;
}
}
static int media_not_present(struct scsi_disk *sdkp,
struct scsi_sense_hdr *sshdr)
{
if (!scsi_sense_valid(sshdr))
return 0;
/* not invoked for commands that could return deferred errors */
switch (sshdr->sense_key) {
case UNIT_ATTENTION:
case NOT_READY:
/* medium not present */
if (sshdr->asc == 0x3A) {
set_media_not_present(sdkp);
return 1;
}
}
return 0;
}
/**
* sd_media_changed - check if our medium changed
* @disk: kernel device descriptor
* sd_check_events - check media events
* @disk: kernel device descriptor
* @clearing: disk events currently being cleared
*
* Returns 0 if not applicable or no change; 1 if change
* Returns mask of DISK_EVENT_*.
*
* Note: this function is invoked from the block subsystem.
**/
static int sd_media_changed(struct gendisk *disk)
static unsigned int sd_check_events(struct gendisk *disk, unsigned int clearing)
{
struct scsi_disk *sdkp = scsi_disk(disk);
struct scsi_device *sdp = sdkp->device;
struct scsi_sense_hdr *sshdr = NULL;
int retval;
SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_media_changed\n"));
if (!sdp->removable)
return 0;
SCSI_LOG_HLQUEUE(3, sd_printk(KERN_INFO, sdkp, "sd_check_events\n"));
/*
* If the device is offline, don't send any commands - just pretend as
@ -1043,40 +1064,32 @@ static int sd_media_changed(struct gendisk *disk)
sshdr);
}
if (retval) {
/* failed to execute TUR, assume media not present */
if (host_byte(retval)) {
set_media_not_present(sdkp);
goto out;
}
if (media_not_present(sdkp, sshdr))
goto out;
/*
* For removable scsi disk we have to recognise the presence
* of a disk in the drive. This is kept in the struct scsi_disk
* struct and tested at open ! Daniel Roche (dan@lectra.fr)
* of a disk in the drive.
*/
if (!sdkp->media_present)
sdp->changed = 1;
sdkp->media_present = 1;
out:
/*
* Report a media change under the following conditions:
* sdp->changed is set under the following conditions:
*
* Medium is present now and wasn't present before.
* Medium wasn't present before and is present now.
* Medium was present at all times, but it changed while
* we weren't looking (sdp->changed is set).
*
* If there was no medium before and there is no medium now then
* don't report a change, even if a medium was inserted and removed
* while we weren't looking.
* Medium present state has changed in either direction.
* Device has indicated UNIT_ATTENTION.
*/
retval = (sdkp->media_present != sdkp->previous_state ||
(sdkp->media_present && sdp->changed));
if (retval)
sdev_evt_send_simple(sdp, SDEV_EVT_MEDIA_CHANGE, GFP_KERNEL);
sdkp->previous_state = sdkp->media_present;
/* sdp->changed indicates medium was changed or is not present */
sdp->changed = !sdkp->media_present;
kfree(sshdr);
retval = sdp->changed ? DISK_EVENT_MEDIA_CHANGE : 0;
sdp->changed = 0;
return retval;
}
@ -1169,7 +1182,7 @@ static const struct block_device_operations sd_fops = {
#ifdef CONFIG_COMPAT
.compat_ioctl = sd_compat_ioctl,
#endif
.media_changed = sd_media_changed,
.check_events = sd_check_events,
.revalidate_disk = sd_revalidate_disk,
.unlock_native_capacity = sd_unlock_native_capacity,
};
@ -1312,23 +1325,6 @@ static int sd_done(struct scsi_cmnd *SCpnt)
return good_bytes;
}
static int media_not_present(struct scsi_disk *sdkp,
struct scsi_sense_hdr *sshdr)
{
if (!scsi_sense_valid(sshdr))
return 0;
/* not invoked for commands that could return deferred errors */
if (sshdr->sense_key != NOT_READY &&
sshdr->sense_key != UNIT_ATTENTION)
return 0;
if (sshdr->asc != 0x3A) /* medium not present */
return 0;
set_media_not_present(sdkp);
return 1;
}
/*
* spinup disk - called only in sd_revalidate_disk()
*/
@ -1503,7 +1499,7 @@ static void read_capacity_error(struct scsi_disk *sdkp, struct scsi_device *sdp,
*/
if (sdp->removable &&
sense_valid && sshdr->sense_key == NOT_READY)
sdp->changed = 1;
set_media_not_present(sdkp);
/*
* We used to set media_present to 0 here to indicate no media
@ -2389,8 +2385,10 @@ static void sd_probe_async(void *data, async_cookie_t cookie)
gd->driverfs_dev = &sdp->sdev_gendev;
gd->flags = GENHD_FL_EXT_DEVT;
if (sdp->removable)
if (sdp->removable) {
gd->flags |= GENHD_FL_REMOVABLE;
gd->events |= DISK_EVENT_MEDIA_CHANGE;
}
add_disk(gd);
sd_dif_config_host(sdkp);
@ -2472,7 +2470,6 @@ static int sd_probe(struct device *dev)
sdkp->disk = gd;
sdkp->index = index;
atomic_set(&sdkp->openers, 0);
sdkp->previous_state = 1;
if (!sdp->request_queue->rq_timeout) {
if (sdp->type != TYPE_MOD)

1
drivers/scsi/sd.h
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@ -55,7 +55,6 @@ struct scsi_disk {
u8 media_present;
u8 write_prot;
u8 protection_type;/* Data Integrity Field */
unsigned previous_state : 1;
unsigned ATO : 1; /* state of disk ATO bit */
unsigned WCE : 1; /* state of disk WCE bit */
unsigned RCD : 1; /* state of disk RCD bit, unused */

4
drivers/scsi/sr.c
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@ -249,10 +249,6 @@ skip_tur:
cd->device->changed = 0;
}
/* for backward compatibility */
if (events & DISK_EVENT_MEDIA_CHANGE)
sdev_evt_send_simple(cd->device, SDEV_EVT_MEDIA_CHANGE,
GFP_KERNEL);
return events;
}

32
drivers/target/Kconfig Normal file
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@ -0,0 +1,32 @@
menuconfig TARGET_CORE
tristate "Generic Target Core Mod (TCM) and ConfigFS Infrastructure"
depends on SCSI && BLOCK
select CONFIGFS_FS
default n
help
Say Y or M here to enable the TCM Storage Engine and ConfigFS enabled
control path for target_core_mod. This includes built-in TCM RAMDISK
subsystem logic for virtual LUN 0 access
if TARGET_CORE
config TCM_IBLOCK
tristate "TCM/IBLOCK Subsystem Plugin for Linux/BLOCK"
help
Say Y here to enable the TCM/IBLOCK subsystem plugin for non-buffered
access to Linux/Block devices using BIO
config TCM_FILEIO
tristate "TCM/FILEIO Subsystem Plugin for Linux/VFS"
help
Say Y here to enable the TCM/FILEIO subsystem plugin for buffered
access to Linux/VFS struct file or struct block_device
config TCM_PSCSI
tristate "TCM/pSCSI Subsystem Plugin for Linux/SCSI"
help
Say Y here to enable the TCM/pSCSI subsystem plugin for non-buffered
passthrough access to Linux/SCSI device
endif

24
drivers/target/Makefile Normal file
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@ -0,0 +1,24 @@
EXTRA_CFLAGS += -I$(srctree)/drivers/target/ -I$(srctree)/drivers/scsi/
target_core_mod-y := target_core_configfs.o \
target_core_device.o \
target_core_fabric_configfs.o \
target_core_fabric_lib.o \
target_core_hba.o \
target_core_pr.o \
target_core_alua.o \
target_core_scdb.o \
target_core_tmr.o \
target_core_tpg.o \
target_core_transport.o \
target_core_cdb.o \
target_core_ua.o \
target_core_rd.o \
target_core_mib.o
obj-$(CONFIG_TARGET_CORE) += target_core_mod.o
# Subsystem modules
obj-$(CONFIG_TCM_IBLOCK) += target_core_iblock.o
obj-$(CONFIG_TCM_FILEIO) += target_core_file.o
obj-$(CONFIG_TCM_PSCSI) += target_core_pscsi.o

1991
drivers/target/target_core_alua.c Normal file
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126
drivers/target/target_core_alua.h Normal file
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@ -0,0 +1,126 @@
#ifndef TARGET_CORE_ALUA_H
#define TARGET_CORE_ALUA_H
/*
* INQUIRY response data, TPGS Field
*
* from spc4r17 section 6.4.2 Table 135
*/
#define TPGS_NO_ALUA 0x00
#define TPGS_IMPLICT_ALUA 0x10
#define TPGS_EXPLICT_ALUA 0x20
/*
* ASYMMETRIC ACCESS STATE field
*
* from spc4r17 section 6.27 Table 245
*/
#define ALUA_ACCESS_STATE_ACTIVE_OPTMIZED 0x0
#define ALUA_ACCESS_STATE_ACTIVE_NON_OPTIMIZED 0x1
#define ALUA_ACCESS_STATE_STANDBY 0x2
#define ALUA_ACCESS_STATE_UNAVAILABLE 0x3
#define ALUA_ACCESS_STATE_OFFLINE 0xe
#define ALUA_ACCESS_STATE_TRANSITION 0xf
/*
* REPORT_TARGET_PORT_GROUP STATUS CODE
*
* from spc4r17 section 6.27 Table 246
*/
#define ALUA_STATUS_NONE 0x00
#define ALUA_STATUS_ALTERED_BY_EXPLICT_STPG 0x01
#define ALUA_STATUS_ALTERED_BY_IMPLICT_ALUA 0x02
/*
* From spc4r17, Table D.1: ASC and ASCQ Assignement
*/
#define ASCQ_04H_ALUA_STATE_TRANSITION 0x0a
#define ASCQ_04H_ALUA_TG_PT_STANDBY 0x0b
#define ASCQ_04H_ALUA_TG_PT_UNAVAILABLE 0x0c
#define ASCQ_04H_ALUA_OFFLINE 0x12
/*
* Used as the default for Active/NonOptimized delay (in milliseconds)
* This can also be changed via configfs on a per target port group basis..
*/
#define ALUA_DEFAULT_NONOP_DELAY_MSECS 100
#define ALUA_MAX_NONOP_DELAY_MSECS 10000 /* 10 seconds */
/*
* Used for implict and explict ALUA transitional delay, that is disabled
* by default, and is intended to be used for debugging client side ALUA code.
*/
#define ALUA_DEFAULT_TRANS_DELAY_MSECS 0
#define ALUA_MAX_TRANS_DELAY_MSECS 30000 /* 30 seconds */
/*
* Used by core_alua_update_tpg_primary_metadata() and
* core_alua_update_tpg_secondary_metadata()
*/
#define ALUA_METADATA_PATH_LEN 512
/*
* Used by core_alua_update_tpg_secondary_metadata()
*/
#define ALUA_SECONDARY_METADATA_WWN_LEN 256
extern struct kmem_cache *t10_alua_lu_gp_cache;
extern struct kmem_cache *t10_alua_lu_gp_mem_cache;
extern struct kmem_cache *t10_alua_tg_pt_gp_cache;
extern struct kmem_cache *t10_alua_tg_pt_gp_mem_cache;
extern int core_emulate_report_target_port_groups(struct se_cmd *);
extern int core_emulate_set_target_port_groups(struct se_cmd *);
extern int core_alua_check_nonop_delay(struct se_cmd *);
extern int core_alua_do_port_transition(struct t10_alua_tg_pt_gp *,
struct se_device *, struct se_port *,
struct se_node_acl *, int, int);
extern char *core_alua_dump_status(int);
extern struct t10_alua_lu_gp *core_alua_allocate_lu_gp(const char *, int);
extern int core_alua_set_lu_gp_id(struct t10_alua_lu_gp *, u16);
extern void core_alua_free_lu_gp(struct t10_alua_lu_gp *);
extern void core_alua_free_lu_gp_mem(struct se_device *);
extern struct t10_alua_lu_gp *core_alua_get_lu_gp_by_name(const char *);
extern void core_alua_put_lu_gp_from_name(struct t10_alua_lu_gp *);
extern void __core_alua_attach_lu_gp_mem(struct t10_alua_lu_gp_member *,
struct t10_alua_lu_gp *);
extern void __core_alua_drop_lu_gp_mem(struct t10_alua_lu_gp_member *,
struct t10_alua_lu_gp *);
extern void core_alua_drop_lu_gp_dev(struct se_device *);
extern struct t10_alua_tg_pt_gp *core_alua_allocate_tg_pt_gp(
struct se_subsystem_dev *, const char *, int);
extern int core_alua_set_tg_pt_gp_id(struct t10_alua_tg_pt_gp *, u16);
extern struct t10_alua_tg_pt_gp_member *core_alua_allocate_tg_pt_gp_mem(
struct se_port *);
extern void core_alua_free_tg_pt_gp(struct t10_alua_tg_pt_gp *);
extern void core_alua_free_tg_pt_gp_mem(struct se_port *);
extern void __core_alua_attach_tg_pt_gp_mem(struct t10_alua_tg_pt_gp_member *,
struct t10_alua_tg_pt_gp *);
extern ssize_t core_alua_show_tg_pt_gp_info(struct se_port *, char *);
extern ssize_t core_alua_store_tg_pt_gp_info(struct se_port *, const char *,
size_t);
extern ssize_t core_alua_show_access_type(struct t10_alua_tg_pt_gp *, char *);
extern ssize_t core_alua_store_access_type(struct t10_alua_tg_pt_gp *,
const char *, size_t);
extern ssize_t core_alua_show_nonop_delay_msecs(struct t10_alua_tg_pt_gp *,
char *);
extern ssize_t core_alua_store_nonop_delay_msecs(struct t10_alua_tg_pt_gp *,
const char *, size_t);
extern ssize_t core_alua_show_trans_delay_msecs(struct t10_alua_tg_pt_gp *,
char *);
extern ssize_t core_alua_store_trans_delay_msecs(struct t10_alua_tg_pt_gp *,
const char *, size_t);
extern ssize_t core_alua_show_preferred_bit(struct t10_alua_tg_pt_gp *,
char *);
extern ssize_t core_alua_store_preferred_bit(struct t10_alua_tg_pt_gp *,
const char *, size_t);
extern ssize_t core_alua_show_offline_bit(struct se_lun *, char *);
extern ssize_t core_alua_store_offline_bit(struct se_lun *, const char *,
size_t);
extern ssize_t core_alua_show_secondary_status(struct se_lun *, char *);
extern ssize_t core_alua_store_secondary_status(struct se_lun *,
const char *, size_t);
extern ssize_t core_alua_show_secondary_write_metadata(struct se_lun *,
char *);
extern ssize_t core_alua_store_secondary_write_metadata(struct se_lun *,
const char *, size_t);
extern int core_setup_alua(struct se_device *, int);
#endif /* TARGET_CORE_ALUA_H */

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drivers/target/target_core_cdb.c Normal file
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drivers/target/target_core_configfs.c Normal file
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1694
drivers/target/target_core_device.c Normal file
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996
drivers/target/target_core_fabric_configfs.c Normal file
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/*******************************************************************************
* Filename: target_core_fabric_configfs.c
*
* This file contains generic fabric module configfs infrastructure for
* TCM v4.x code
*
* Copyright (c) 2010 Rising Tide Systems
* Copyright (c) 2010 Linux-iSCSI.org
*
* Copyright (c) 2010 Nicholas A. Bellinger <nab@linux-iscsi.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
****************************************************************************/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/version.h>
#include <generated/utsrelease.h>
#include <linux/utsname.h>
#include <linux/init.h>
#include <linux/fs.h>
#include <linux/namei.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/delay.h>
#include <linux/unistd.h>
#include <linux/string.h>
#include <linux/syscalls.h>
#include <linux/configfs.h>
#include <target/target_core_base.h>
#include <target/target_core_device.h>
#include <target/target_core_tpg.h>
#include <target/target_core_transport.h>
#include <target/target_core_fabric_ops.h>
#include <target/target_core_fabric_configfs.h>
#include <target/target_core_configfs.h>
#include <target/configfs_macros.h>
#include "target_core_alua.h"
#include "target_core_hba.h"
#include "target_core_pr.h"
#define TF_CIT_SETUP(_name, _item_ops, _group_ops, _attrs) \
static void target_fabric_setup_##_name##_cit(struct target_fabric_configfs *tf) \
{ \
struct target_fabric_configfs_template *tfc = &tf->tf_cit_tmpl; \
struct config_item_type *cit = &tfc->tfc_##_name##_cit; \
\
cit->ct_item_ops = _item_ops; \
cit->ct_group_ops = _group_ops; \
cit->ct_attrs = _attrs; \
cit->ct_owner = tf->tf_module; \
printk("Setup generic %s\n", __stringify(_name)); \
}
/* Start of tfc_tpg_mappedlun_cit */
static int target_fabric_mappedlun_link(
struct config_item *lun_acl_ci,
struct config_item *lun_ci)
{
struct se_dev_entry *deve;
struct se_lun *lun = container_of(to_config_group(lun_ci),
struct se_lun, lun_group);
struct se_lun_acl *lacl = container_of(to_config_group(lun_acl_ci),
struct se_lun_acl, se_lun_group);
struct se_portal_group *se_tpg;
struct config_item *nacl_ci, *tpg_ci, *tpg_ci_s, *wwn_ci, *wwn_ci_s;
int ret = 0, lun_access;
/*
* Ensure that the source port exists
*/
if (!(lun->lun_sep) || !(lun->lun_sep->sep_tpg)) {
printk(KERN_ERR "Source se_lun->lun_sep or lun->lun_sep->sep"
"_tpg does not exist\n");
return -EINVAL;
}
se_tpg = lun->lun_sep->sep_tpg;
nacl_ci = &lun_acl_ci->ci_parent->ci_group->cg_item;
tpg_ci = &nacl_ci->ci_group->cg_item;
wwn_ci = &tpg_ci->ci_group->cg_item;
tpg_ci_s = &lun_ci->ci_parent->ci_group->cg_item;
wwn_ci_s = &tpg_ci_s->ci_group->cg_item;
/*
* Make sure the SymLink is going to the same $FABRIC/$WWN/tpgt_$TPGT
*/
if (strcmp(config_item_name(wwn_ci), config_item_name(wwn_ci_s))) {
printk(KERN_ERR "Illegal Initiator ACL SymLink outside of %s\n",
config_item_name(wwn_ci));
return -EINVAL;
}
if (strcmp(config_item_name(tpg_ci), config_item_name(tpg_ci_s))) {
printk(KERN_ERR "Illegal Initiator ACL Symlink outside of %s"
" TPGT: %s\n", config_item_name(wwn_ci),
config_item_name(tpg_ci));
return -EINVAL;
}
/*
* If this struct se_node_acl was dynamically generated with
* tpg_1/attrib/generate_node_acls=1, use the existing deve->lun_flags,
* which be will write protected (READ-ONLY) when
* tpg_1/attrib/demo_mode_write_protect=1
*/
spin_lock_irq(&lacl->se_lun_nacl->device_list_lock);
deve = &lacl->se_lun_nacl->device_list[lacl->mapped_lun];
if (deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS)
lun_access = deve->lun_flags;
else
lun_access =
(TPG_TFO(se_tpg)->tpg_check_prod_mode_write_protect(
se_tpg)) ? TRANSPORT_LUNFLAGS_READ_ONLY :
TRANSPORT_LUNFLAGS_READ_WRITE;
spin_unlock_irq(&lacl->se_lun_nacl->device_list_lock);
/*
* Determine the actual mapped LUN value user wants..
*
* This value is what the SCSI Initiator actually sees the
* iscsi/$IQN/$TPGT/lun/lun_* as on their SCSI Initiator Ports.
*/
ret = core_dev_add_initiator_node_lun_acl(se_tpg, lacl,
lun->unpacked_lun, lun_access);
return (ret < 0) ? -EINVAL : 0;
}
static int target_fabric_mappedlun_unlink(
struct config_item *lun_acl_ci,
struct config_item *lun_ci)
{
struct se_lun *lun;
struct se_lun_acl *lacl = container_of(to_config_group(lun_acl_ci),
struct se_lun_acl, se_lun_group);
struct se_node_acl *nacl = lacl->se_lun_nacl;
struct se_dev_entry *deve = &nacl->device_list[lacl->mapped_lun];
struct se_portal_group *se_tpg;
/*
* Determine if the underlying MappedLUN has already been released..
*/
if (!(deve->se_lun))
return 0;
lun = container_of(to_config_group(lun_ci), struct se_lun, lun_group);
se_tpg = lun->lun_sep->sep_tpg;
core_dev_del_initiator_node_lun_acl(se_tpg, lun, lacl);
return 0;
}
CONFIGFS_EATTR_STRUCT(target_fabric_mappedlun, se_lun_acl);
#define TCM_MAPPEDLUN_ATTR(_name, _mode) \
static struct target_fabric_mappedlun_attribute target_fabric_mappedlun_##_name = \
__CONFIGFS_EATTR(_name, _mode, \
target_fabric_mappedlun_show_##_name, \
target_fabric_mappedlun_store_##_name);
static ssize_t target_fabric_mappedlun_show_write_protect(
struct se_lun_acl *lacl,
char *page)
{
struct se_node_acl *se_nacl = lacl->se_lun_nacl;
struct se_dev_entry *deve;
ssize_t len;
spin_lock_irq(&se_nacl->device_list_lock);
deve = &se_nacl->device_list[lacl->mapped_lun];
len = sprintf(page, "%d\n",
(deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY) ?
1 : 0);
spin_unlock_irq(&se_nacl->device_list_lock);
return len;
}
static ssize_t target_fabric_mappedlun_store_write_protect(
struct se_lun_acl *lacl,
const char *page,
size_t count)
{
struct se_node_acl *se_nacl = lacl->se_lun_nacl;
struct se_portal_group *se_tpg = se_nacl->se_tpg;
unsigned long op;
if (strict_strtoul(page, 0, &op))
return -EINVAL;
if ((op != 1) && (op != 0))
return -EINVAL;
core_update_device_list_access(lacl->mapped_lun, (op) ?
TRANSPORT_LUNFLAGS_READ_ONLY :
TRANSPORT_LUNFLAGS_READ_WRITE,
lacl->se_lun_nacl);
printk(KERN_INFO "%s_ConfigFS: Changed Initiator ACL: %s"
" Mapped LUN: %u Write Protect bit to %s\n",
TPG_TFO(se_tpg)->get_fabric_name(),
lacl->initiatorname, lacl->mapped_lun, (op) ? "ON" : "OFF");
return count;
}
TCM_MAPPEDLUN_ATTR(write_protect, S_IRUGO | S_IWUSR);
CONFIGFS_EATTR_OPS(target_fabric_mappedlun, se_lun_acl, se_lun_group);
static struct configfs_attribute *target_fabric_mappedlun_attrs[] = {
&target_fabric_mappedlun_write_protect.attr,
NULL,
};
static struct configfs_item_operations target_fabric_mappedlun_item_ops = {
.show_attribute = target_fabric_mappedlun_attr_show,
.store_attribute = target_fabric_mappedlun_attr_store,
.allow_link = target_fabric_mappedlun_link,
.drop_link = target_fabric_mappedlun_unlink,
};
TF_CIT_SETUP(tpg_mappedlun, &target_fabric_mappedlun_item_ops, NULL,
target_fabric_mappedlun_attrs);
/* End of tfc_tpg_mappedlun_cit */
/* Start of tfc_tpg_nacl_attrib_cit */
CONFIGFS_EATTR_OPS(target_fabric_nacl_attrib, se_node_acl, acl_attrib_group);
static struct configfs_item_operations target_fabric_nacl_attrib_item_ops = {
.show_attribute = target_fabric_nacl_attrib_attr_show,
.store_attribute = target_fabric_nacl_attrib_attr_store,
};
TF_CIT_SETUP(tpg_nacl_attrib, &target_fabric_nacl_attrib_item_ops, NULL, NULL);
/* End of tfc_tpg_nacl_attrib_cit */
/* Start of tfc_tpg_nacl_auth_cit */
CONFIGFS_EATTR_OPS(target_fabric_nacl_auth, se_node_acl, acl_auth_group);
static struct configfs_item_operations target_fabric_nacl_auth_item_ops = {
.show_attribute = target_fabric_nacl_auth_attr_show,
.store_attribute = target_fabric_nacl_auth_attr_store,
};
TF_CIT_SETUP(tpg_nacl_auth, &target_fabric_nacl_auth_item_ops, NULL, NULL);
/* End of tfc_tpg_nacl_auth_cit */
/* Start of tfc_tpg_nacl_param_cit */
CONFIGFS_EATTR_OPS(target_fabric_nacl_param, se_node_acl, acl_param_group);
static struct configfs_item_operations target_fabric_nacl_param_item_ops = {
.show_attribute = target_fabric_nacl_param_attr_show,
.store_attribute = target_fabric_nacl_param_attr_store,
};
TF_CIT_SETUP(tpg_nacl_param, &target_fabric_nacl_param_item_ops, NULL, NULL);
/* End of tfc_tpg_nacl_param_cit */
/* Start of tfc_tpg_nacl_base_cit */
CONFIGFS_EATTR_OPS(target_fabric_nacl_base, se_node_acl, acl_group);
static struct config_group *target_fabric_make_mappedlun(
struct config_group *group,
const char *name)
{
struct se_node_acl *se_nacl = container_of(group,
struct se_node_acl, acl_group);
struct se_portal_group *se_tpg = se_nacl->se_tpg;
struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
struct se_lun_acl *lacl;
struct config_item *acl_ci;
char *buf;
unsigned long mapped_lun;
int ret = 0;
acl_ci = &group->cg_item;
if (!(acl_ci)) {
printk(KERN_ERR "Unable to locatel acl_ci\n");
return NULL;
}
buf = kzalloc(strlen(name) + 1, GFP_KERNEL);
if (!(buf)) {
printk(KERN_ERR "Unable to allocate memory for name buf\n");
return ERR_PTR(-ENOMEM);
}
snprintf(buf, strlen(name) + 1, "%s", name);
/*
* Make sure user is creating iscsi/$IQN/$TPGT/acls/$INITIATOR/lun_$ID.
*/
if (strstr(buf, "lun_") != buf) {
printk(KERN_ERR "Unable to locate \"lun_\" from buf: %s"
" name: %s\n", buf, name);
ret = -EINVAL;
goto out;
}
/*
* Determine the Mapped LUN value. This is what the SCSI Initiator
* Port will actually see.
*/
if (strict_strtoul(buf + 4, 0, &mapped_lun) || mapped_lun > UINT_MAX) {
ret = -EINVAL;
goto out;
}
lacl = core_dev_init_initiator_node_lun_acl(se_tpg, mapped_lun,
config_item_name(acl_ci), &ret);
if (!(lacl))
goto out;
config_group_init_type_name(&lacl->se_lun_group, name,
&TF_CIT_TMPL(tf)->tfc_tpg_mappedlun_cit);
kfree(buf);
return &lacl->se_lun_group;
out:
kfree(buf);
return ERR_PTR(ret);
}
static void target_fabric_drop_mappedlun(
struct config_group *group,
struct config_item *item)
{
struct se_lun_acl *lacl = container_of(to_config_group(item),
struct se_lun_acl, se_lun_group);
struct se_portal_group *se_tpg = lacl->se_lun_nacl->se_tpg;
config_item_put(item);
core_dev_free_initiator_node_lun_acl(se_tpg, lacl);
}
static struct configfs_item_operations target_fabric_nacl_base_item_ops = {
.show_attribute = target_fabric_nacl_base_attr_show,
.store_attribute = target_fabric_nacl_base_attr_store,
};
static struct configfs_group_operations target_fabric_nacl_base_group_ops = {
.make_group = target_fabric_make_mappedlun,
.drop_item = target_fabric_drop_mappedlun,
};
TF_CIT_SETUP(tpg_nacl_base, &target_fabric_nacl_base_item_ops,
&target_fabric_nacl_base_group_ops, NULL);
/* End of tfc_tpg_nacl_base_cit */
/* Start of tfc_tpg_nacl_cit */
static struct config_group *target_fabric_make_nodeacl(
struct config_group *group,
const char *name)
{
struct se_portal_group *se_tpg = container_of(group,
struct se_portal_group, tpg_acl_group);
struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
struct se_node_acl *se_nacl;
struct config_group *nacl_cg;
if (!(tf->tf_ops.fabric_make_nodeacl)) {
printk(KERN_ERR "tf->tf_ops.fabric_make_nodeacl is NULL\n");
return ERR_PTR(-ENOSYS);
}
se_nacl = tf->tf_ops.fabric_make_nodeacl(se_tpg, group, name);
if (IS_ERR(se_nacl))
return ERR_PTR(PTR_ERR(se_nacl));
nacl_cg = &se_nacl->acl_group;
nacl_cg->default_groups = se_nacl->acl_default_groups;
nacl_cg->default_groups[0] = &se_nacl->acl_attrib_group;
nacl_cg->default_groups[1] = &se_nacl->acl_auth_group;
nacl_cg->default_groups[2] = &se_nacl->acl_param_group;
nacl_cg->default_groups[3] = NULL;
config_group_init_type_name(&se_nacl->acl_group, name,
&TF_CIT_TMPL(tf)->tfc_tpg_nacl_base_cit);
config_group_init_type_name(&se_nacl->acl_attrib_group, "attrib",
&TF_CIT_TMPL(tf)->tfc_tpg_nacl_attrib_cit);
config_group_init_type_name(&se_nacl->acl_auth_group, "auth",
&TF_CIT_TMPL(tf)->tfc_tpg_nacl_auth_cit);
config_group_init_type_name(&se_nacl->acl_param_group, "param",
&TF_CIT_TMPL(tf)->tfc_tpg_nacl_param_cit);
return &se_nacl->acl_group;
}
static void target_fabric_drop_nodeacl(
struct config_group *group,
struct config_item *item)
{
struct se_portal_group *se_tpg = container_of(group,
struct se_portal_group, tpg_acl_group);
struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
struct se_node_acl *se_nacl = container_of(to_config_group(item),
struct se_node_acl, acl_group);
struct config_item *df_item;
struct config_group *nacl_cg;
int i;
nacl_cg = &se_nacl->acl_group;
for (i = 0; nacl_cg->default_groups[i]; i++) {
df_item = &nacl_cg->default_groups[i]->cg_item;
nacl_cg->default_groups[i] = NULL;
config_item_put(df_item);
}
config_item_put(item);
tf->tf_ops.fabric_drop_nodeacl(se_nacl);
}
static struct configfs_group_operations target_fabric_nacl_group_ops = {
.make_group = target_fabric_make_nodeacl,
.drop_item = target_fabric_drop_nodeacl,
};
TF_CIT_SETUP(tpg_nacl, NULL, &target_fabric_nacl_group_ops, NULL);
/* End of tfc_tpg_nacl_cit */
/* Start of tfc_tpg_np_base_cit */
CONFIGFS_EATTR_OPS(target_fabric_np_base, se_tpg_np, tpg_np_group);
static struct configfs_item_operations target_fabric_np_base_item_ops = {
.show_attribute = target_fabric_np_base_attr_show,
.store_attribute = target_fabric_np_base_attr_store,
};
TF_CIT_SETUP(tpg_np_base, &target_fabric_np_base_item_ops, NULL, NULL);
/* End of tfc_tpg_np_base_cit */
/* Start of tfc_tpg_np_cit */
static struct config_group *target_fabric_make_np(
struct config_group *group,
const char *name)
{
struct se_portal_group *se_tpg = container_of(group,
struct se_portal_group, tpg_np_group);
struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
struct se_tpg_np *se_tpg_np;
if (!(tf->tf_ops.fabric_make_np)) {
printk(KERN_ERR "tf->tf_ops.fabric_make_np is NULL\n");
return ERR_PTR(-ENOSYS);
}
se_tpg_np = tf->tf_ops.fabric_make_np(se_tpg, group, name);
if (!(se_tpg_np) || IS_ERR(se_tpg_np))
return ERR_PTR(-EINVAL);
config_group_init_type_name(&se_tpg_np->tpg_np_group, name,
&TF_CIT_TMPL(tf)->tfc_tpg_np_base_cit);
return &se_tpg_np->tpg_np_group;
}
static void target_fabric_drop_np(
struct config_group *group,
struct config_item *item)
{
struct se_portal_group *se_tpg = container_of(group,
struct se_portal_group, tpg_np_group);
struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
struct se_tpg_np *se_tpg_np = container_of(to_config_group(item),
struct se_tpg_np, tpg_np_group);
config_item_put(item);
tf->tf_ops.fabric_drop_np(se_tpg_np);
}
static struct configfs_group_operations target_fabric_np_group_ops = {
.make_group = &target_fabric_make_np,
.drop_item = &target_fabric_drop_np,
};
TF_CIT_SETUP(tpg_np, NULL, &target_fabric_np_group_ops, NULL);
/* End of tfc_tpg_np_cit */
/* Start of tfc_tpg_port_cit */
CONFIGFS_EATTR_STRUCT(target_fabric_port, se_lun);
#define TCM_PORT_ATTR(_name, _mode) \
static struct target_fabric_port_attribute target_fabric_port_##_name = \
__CONFIGFS_EATTR(_name, _mode, \
target_fabric_port_show_attr_##_name, \
target_fabric_port_store_attr_##_name);
#define TCM_PORT_ATTOR_RO(_name) \
__CONFIGFS_EATTR_RO(_name, \
target_fabric_port_show_attr_##_name);
/*
* alua_tg_pt_gp
*/
static ssize_t target_fabric_port_show_attr_alua_tg_pt_gp(
struct se_lun *lun,
char *page)
{
if (!(lun))
return -ENODEV;
if (!(lun->lun_sep))
return -ENODEV;
return core_alua_show_tg_pt_gp_info(lun->lun_sep, page);
}
static ssize_t target_fabric_port_store_attr_alua_tg_pt_gp(
struct se_lun *lun,
const char *page,
size_t count)
{
if (!(lun))
return -ENODEV;
if (!(lun->lun_sep))
return -ENODEV;
return core_alua_store_tg_pt_gp_info(lun->lun_sep, page, count);
}
TCM_PORT_ATTR(alua_tg_pt_gp, S_IRUGO | S_IWUSR);
/*
* alua_tg_pt_offline
*/
static ssize_t target_fabric_port_show_attr_alua_tg_pt_offline(
struct se_lun *lun,
char *page)
{
if (!(lun))
return -ENODEV;
if (!(lun->lun_sep))
return -ENODEV;
return core_alua_show_offline_bit(lun, page);
}
static ssize_t target_fabric_port_store_attr_alua_tg_pt_offline(
struct se_lun *lun,
const char *page,
size_t count)
{
if (!(lun))
return -ENODEV;
if (!(lun->lun_sep))
return -ENODEV;
return core_alua_store_offline_bit(lun, page, count);
}
TCM_PORT_ATTR(alua_tg_pt_offline, S_IRUGO | S_IWUSR);
/*
* alua_tg_pt_status
*/
static ssize_t target_fabric_port_show_attr_alua_tg_pt_status(
struct se_lun *lun,
char *page)
{
if (!(lun))
return -ENODEV;
if (!(lun->lun_sep))
return -ENODEV;
return core_alua_show_secondary_status(lun, page);
}
static ssize_t target_fabric_port_store_attr_alua_tg_pt_status(
struct se_lun *lun,
const char *page,
size_t count)
{
if (!(lun))
return -ENODEV;
if (!(lun->lun_sep))
return -ENODEV;
return core_alua_store_secondary_status(lun, page, count);
}
TCM_PORT_ATTR(alua_tg_pt_status, S_IRUGO | S_IWUSR);
/*
* alua_tg_pt_write_md
*/
static ssize_t target_fabric_port_show_attr_alua_tg_pt_write_md(
struct se_lun *lun,
char *page)
{
if (!(lun))
return -ENODEV;
if (!(lun->lun_sep))
return -ENODEV;
return core_alua_show_secondary_write_metadata(lun, page);
}
static ssize_t target_fabric_port_store_attr_alua_tg_pt_write_md(
struct se_lun *lun,
const char *page,
size_t count)
{
if (!(lun))
return -ENODEV;
if (!(lun->lun_sep))
return -ENODEV;
return core_alua_store_secondary_write_metadata(lun, page, count);
}
TCM_PORT_ATTR(alua_tg_pt_write_md, S_IRUGO | S_IWUSR);
static struct configfs_attribute *target_fabric_port_attrs[] = {
&target_fabric_port_alua_tg_pt_gp.attr,
&target_fabric_port_alua_tg_pt_offline.attr,
&target_fabric_port_alua_tg_pt_status.attr,
&target_fabric_port_alua_tg_pt_write_md.attr,
NULL,
};
CONFIGFS_EATTR_OPS(target_fabric_port, se_lun, lun_group);
static int target_fabric_port_link(
struct config_item *lun_ci,
struct config_item *se_dev_ci)
{
struct config_item *tpg_ci;
struct se_device *dev;
struct se_lun *lun = container_of(to_config_group(lun_ci),
struct se_lun, lun_group);
struct se_lun *lun_p;
struct se_portal_group *se_tpg;
struct se_subsystem_dev *se_dev = container_of(
to_config_group(se_dev_ci), struct se_subsystem_dev,
se_dev_group);
struct target_fabric_configfs *tf;
int ret;
tpg_ci = &lun_ci->ci_parent->ci_group->cg_item;
se_tpg = container_of(to_config_group(tpg_ci),
struct se_portal_group, tpg_group);
tf = se_tpg->se_tpg_wwn->wwn_tf;
if (lun->lun_se_dev != NULL) {
printk(KERN_ERR "Port Symlink already exists\n");
return -EEXIST;
}
dev = se_dev->se_dev_ptr;
if (!(dev)) {
printk(KERN_ERR "Unable to locate struct se_device pointer from"
" %s\n", config_item_name(se_dev_ci));
ret = -ENODEV;
goto out;
}
lun_p = core_dev_add_lun(se_tpg, dev->se_hba, dev,
lun->unpacked_lun);
if ((IS_ERR(lun_p)) || !(lun_p)) {
printk(KERN_ERR "core_dev_add_lun() failed\n");
ret = -EINVAL;
goto out;
}
if (tf->tf_ops.fabric_post_link) {
/*
* Call the optional fabric_post_link() to allow a
* fabric module to setup any additional state once
* core_dev_add_lun() has been called..
*/
tf->tf_ops.fabric_post_link(se_tpg, lun);
}
return 0;
out:
return ret;
}
static int target_fabric_port_unlink(
struct config_item *lun_ci,
struct config_item *se_dev_ci)
{
struct se_lun *lun = container_of(to_config_group(lun_ci),
struct se_lun, lun_group);
struct se_portal_group *se_tpg = lun->lun_sep->sep_tpg;
struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
if (tf->tf_ops.fabric_pre_unlink) {
/*
* Call the optional fabric_pre_unlink() to allow a
* fabric module to release any additional stat before
* core_dev_del_lun() is called.
*/
tf->tf_ops.fabric_pre_unlink(se_tpg, lun);
}
core_dev_del_lun(se_tpg, lun->unpacked_lun);
return 0;
}
static struct configfs_item_operations target_fabric_port_item_ops = {
.show_attribute = target_fabric_port_attr_show,
.store_attribute = target_fabric_port_attr_store,
.allow_link = target_fabric_port_link,
.drop_link = target_fabric_port_unlink,
};
TF_CIT_SETUP(tpg_port, &target_fabric_port_item_ops, NULL, target_fabric_port_attrs);
/* End of tfc_tpg_port_cit */
/* Start of tfc_tpg_lun_cit */
static struct config_group *target_fabric_make_lun(
struct config_group *group,
const char *name)
{
struct se_lun *lun;
struct se_portal_group *se_tpg = container_of(group,
struct se_portal_group, tpg_lun_group);
struct target_fabric_configfs *tf = se_tpg->se_tpg_wwn->wwn_tf;
unsigned long unpacked_lun;
if (strstr(name, "lun_") != name) {
printk(KERN_ERR "Unable to locate \'_\" in"
" \"lun_$LUN_NUMBER\"\n");
return ERR_PTR(-EINVAL);
}
if (strict_strtoul(name + 4, 0, &unpacked_lun) || unpacked_lun > UINT_MAX)
return ERR_PTR(-EINVAL);
lun = core_get_lun_from_tpg(se_tpg, unpacked_lun);
if (!(lun))
return ERR_PTR(-EINVAL);
config_group_init_type_name(&lun->lun_group, name,
&TF_CIT_TMPL(tf)->tfc_tpg_port_cit);
return &lun->lun_group;
}
static void target_fabric_drop_lun(
struct config_group *group,
struct config_item *item)
{
config_item_put(item);
}
static struct configfs_group_operations target_fabric_lun_group_ops = {
.make_group = &target_fabric_make_lun,
.drop_item = &target_fabric_drop_lun,
};
TF_CIT_SETUP(tpg_lun, NULL, &target_fabric_lun_group_ops, NULL);
/* End of tfc_tpg_lun_cit */
/* Start of tfc_tpg_attrib_cit */
CONFIGFS_EATTR_OPS(target_fabric_tpg_attrib, se_portal_group, tpg_attrib_group);
static struct configfs_item_operations target_fabric_tpg_attrib_item_ops = {
.show_attribute = target_fabric_tpg_attrib_attr_show,
.store_attribute = target_fabric_tpg_attrib_attr_store,
};
TF_CIT_SETUP(tpg_attrib, &target_fabric_tpg_attrib_item_ops, NULL, NULL);
/* End of tfc_tpg_attrib_cit */
/* Start of tfc_tpg_param_cit */
CONFIGFS_EATTR_OPS(target_fabric_tpg_param, se_portal_group, tpg_param_group);
static struct configfs_item_operations target_fabric_tpg_param_item_ops = {
.show_attribute = target_fabric_tpg_param_attr_show,
.store_attribute = target_fabric_tpg_param_attr_store,
};
TF_CIT_SETUP(tpg_param, &target_fabric_tpg_param_item_ops, NULL, NULL);
/* End of tfc_tpg_param_cit */
/* Start of tfc_tpg_base_cit */
/*
* For use with TF_TPG_ATTR() and TF_TPG_ATTR_RO()
*/
CONFIGFS_EATTR_OPS(target_fabric_tpg, se_portal_group, tpg_group);
static struct configfs_item_operations target_fabric_tpg_base_item_ops = {
.show_attribute = target_fabric_tpg_attr_show,
.store_attribute = target_fabric_tpg_attr_store,
};
TF_CIT_SETUP(tpg_base, &target_fabric_tpg_base_item_ops, NULL, NULL);
/* End of tfc_tpg_base_cit */
/* Start of tfc_tpg_cit */
static struct config_group *target_fabric_make_tpg(
struct config_group *group,
const char *name)
{
struct se_wwn *wwn = container_of(group, struct se_wwn, wwn_group);
struct target_fabric_configfs *tf = wwn->wwn_tf;
struct se_portal_group *se_tpg;
if (!(tf->tf_ops.fabric_make_tpg)) {
printk(KERN_ERR "tf->tf_ops.fabric_make_tpg is NULL\n");
return ERR_PTR(-ENOSYS);
}
se_tpg = tf->tf_ops.fabric_make_tpg(wwn, group, name);
if (!(se_tpg) || IS_ERR(se_tpg))
return ERR_PTR(-EINVAL);
/*
* Setup default groups from pre-allocated se_tpg->tpg_default_groups
*/
se_tpg->tpg_group.default_groups = se_tpg->tpg_default_groups;
se_tpg->tpg_group.default_groups[0] = &se_tpg->tpg_lun_group;
se_tpg->tpg_group.default_groups[1] = &se_tpg->tpg_np_group;
se_tpg->tpg_group.default_groups[2] = &se_tpg->tpg_acl_group;
se_tpg->tpg_group.default_groups[3] = &se_tpg->tpg_attrib_group;
se_tpg->tpg_group.default_groups[4] = &se_tpg->tpg_param_group;
se_tpg->tpg_group.default_groups[5] = NULL;
config_group_init_type_name(&se_tpg->tpg_group, name,
&TF_CIT_TMPL(tf)->tfc_tpg_base_cit);
config_group_init_type_name(&se_tpg->tpg_lun_group, "lun",
&TF_CIT_TMPL(tf)->tfc_tpg_lun_cit);
config_group_init_type_name(&se_tpg->tpg_np_group, "np",
&TF_CIT_TMPL(tf)->tfc_tpg_np_cit);
config_group_init_type_name(&se_tpg->tpg_acl_group, "acls",
&TF_CIT_TMPL(tf)->tfc_tpg_nacl_cit);
config_group_init_type_name(&se_tpg->tpg_attrib_group, "attrib",
&TF_CIT_TMPL(tf)->tfc_tpg_attrib_cit);
config_group_init_type_name(&se_tpg->tpg_param_group, "param",
&TF_CIT_TMPL(tf)->tfc_tpg_param_cit);
return &se_tpg->tpg_group;
}
static void target_fabric_drop_tpg(
struct config_group *group,
struct config_item *item)
{
struct se_wwn *wwn = container_of(group, struct se_wwn, wwn_group);
struct target_fabric_configfs *tf = wwn->wwn_tf;
struct se_portal_group *se_tpg = container_of(to_config_group(item),
struct se_portal_group, tpg_group);
struct config_group *tpg_cg = &se_tpg->tpg_group;
struct config_item *df_item;
int i;
/*
* Release default groups, but do not release tpg_cg->default_groups
* memory as it is statically allocated at se_tpg->tpg_default_groups.
*/
for (i = 0; tpg_cg->default_groups[i]; i++) {
df_item = &tpg_cg->default_groups[i]->cg_item;
tpg_cg->default_groups[i] = NULL;
config_item_put(df_item);
}
config_item_put(item);
tf->tf_ops.fabric_drop_tpg(se_tpg);
}
static struct configfs_group_operations target_fabric_tpg_group_ops = {
.make_group = target_fabric_make_tpg,
.drop_item = target_fabric_drop_tpg,
};
TF_CIT_SETUP(tpg, NULL, &target_fabric_tpg_group_ops, NULL);
/* End of tfc_tpg_cit */
/* Start of tfc_wwn_cit */
static struct config_group *target_fabric_make_wwn(
struct config_group *group,
const char *name)
{
struct target_fabric_configfs *tf = container_of(group,
struct target_fabric_configfs, tf_group);
struct se_wwn *wwn;
if (!(tf->tf_ops.fabric_make_wwn)) {
printk(KERN_ERR "tf->tf_ops.fabric_make_wwn is NULL\n");
return ERR_PTR(-ENOSYS);
}
wwn = tf->tf_ops.fabric_make_wwn(tf, group, name);
if (!(wwn) || IS_ERR(wwn))
return ERR_PTR(-EINVAL);
wwn->wwn_tf = tf;
config_group_init_type_name(&wwn->wwn_group, name,
&TF_CIT_TMPL(tf)->tfc_tpg_cit);
return &wwn->wwn_group;
}
static void target_fabric_drop_wwn(
struct config_group *group,
struct config_item *item)
{
struct target_fabric_configfs *tf = container_of(group,
struct target_fabric_configfs, tf_group);
struct se_wwn *wwn = container_of(to_config_group(item),
struct se_wwn, wwn_group);
config_item_put(item);
tf->tf_ops.fabric_drop_wwn(wwn);
}
static struct configfs_group_operations target_fabric_wwn_group_ops = {
.make_group = target_fabric_make_wwn,
.drop_item = target_fabric_drop_wwn,
};
/*
* For use with TF_WWN_ATTR() and TF_WWN_ATTR_RO()
*/
CONFIGFS_EATTR_OPS(target_fabric_wwn, target_fabric_configfs, tf_group);
static struct configfs_item_operations target_fabric_wwn_item_ops = {
.show_attribute = target_fabric_wwn_attr_show,
.store_attribute = target_fabric_wwn_attr_store,
};
TF_CIT_SETUP(wwn, &target_fabric_wwn_item_ops, &target_fabric_wwn_group_ops, NULL);
/* End of tfc_wwn_cit */
/* Start of tfc_discovery_cit */
CONFIGFS_EATTR_OPS(target_fabric_discovery, target_fabric_configfs,
tf_disc_group);
static struct configfs_item_operations target_fabric_discovery_item_ops = {
.show_attribute = target_fabric_discovery_attr_show,
.store_attribute = target_fabric_discovery_attr_store,
};
TF_CIT_SETUP(discovery, &target_fabric_discovery_item_ops, NULL, NULL);
/* End of tfc_discovery_cit */
int target_fabric_setup_cits(struct target_fabric_configfs *tf)
{
target_fabric_setup_discovery_cit(tf);
target_fabric_setup_wwn_cit(tf);
target_fabric_setup_tpg_cit(tf);
target_fabric_setup_tpg_base_cit(tf);
target_fabric_setup_tpg_port_cit(tf);
target_fabric_setup_tpg_lun_cit(tf);
target_fabric_setup_tpg_np_cit(tf);
target_fabric_setup_tpg_np_base_cit(tf);
target_fabric_setup_tpg_attrib_cit(tf);
target_fabric_setup_tpg_param_cit(tf);
target_fabric_setup_tpg_nacl_cit(tf);
target_fabric_setup_tpg_nacl_base_cit(tf);
target_fabric_setup_tpg_nacl_attrib_cit(tf);
target_fabric_setup_tpg_nacl_auth_cit(tf);
target_fabric_setup_tpg_nacl_param_cit(tf);
target_fabric_setup_tpg_mappedlun_cit(tf);
return 0;
}

451
drivers/target/target_core_fabric_lib.c Normal file
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@ -0,0 +1,451 @@
/*******************************************************************************
* Filename: target_core_fabric_lib.c
*
* This file contains generic high level protocol identifier and PR
* handlers for TCM fabric modules
*
* Copyright (c) 2010 Rising Tide Systems, Inc.
* Copyright (c) 2010 Linux-iSCSI.org
*
* Nicholas A. Bellinger <nab@linux-iscsi.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
******************************************************************************/
#include <linux/string.h>
#include <linux/ctype.h>
#include <linux/spinlock.h>
#include <linux/smp_lock.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <target/target_core_base.h>
#include <target/target_core_device.h>
#include <target/target_core_transport.h>
#include <target/target_core_fabric_ops.h>
#include <target/target_core_configfs.h>
#include "target_core_hba.h"
#include "target_core_pr.h"
/*
* Handlers for Serial Attached SCSI (SAS)
*/
u8 sas_get_fabric_proto_ident(struct se_portal_group *se_tpg)
{
/*
* Return a SAS Serial SCSI Protocol identifier for loopback operations
* This is defined in section 7.5.1 Table 362 in spc4r17
*/
return 0x6;
}
EXPORT_SYMBOL(sas_get_fabric_proto_ident);
u32 sas_get_pr_transport_id(
struct se_portal_group *se_tpg,
struct se_node_acl *se_nacl,
struct t10_pr_registration *pr_reg,
int *format_code,
unsigned char *buf)
{
unsigned char binary, *ptr;
int i;
u32 off = 4;
/*
* Set PROTOCOL IDENTIFIER to 6h for SAS
*/
buf[0] = 0x06;
/*
* From spc4r17, 7.5.4.7 TransportID for initiator ports using SCSI
* over SAS Serial SCSI Protocol
*/
ptr = &se_nacl->initiatorname[4]; /* Skip over 'naa. prefix */
for (i = 0; i < 16; i += 2) {
binary = transport_asciihex_to_binaryhex(&ptr[i]);
buf[off++] = binary;
}
/*
* The SAS Transport ID is a hardcoded 24-byte length
*/
return 24;
}
EXPORT_SYMBOL(sas_get_pr_transport_id);
u32 sas_get_pr_transport_id_len(
struct se_portal_group *se_tpg,
struct se_node_acl *se_nacl,
struct t10_pr_registration *pr_reg,
int *format_code)
{
*format_code = 0;
/*
* From spc4r17, 7.5.4.7 TransportID for initiator ports using SCSI
* over SAS Serial SCSI Protocol
*
* The SAS Transport ID is a hardcoded 24-byte length
*/
return 24;
}
EXPORT_SYMBOL(sas_get_pr_transport_id_len);
/*
* Used for handling SCSI fabric dependent TransportIDs in SPC-3 and above
* Persistent Reservation SPEC_I_PT=1 and PROUT REGISTER_AND_MOVE operations.
*/
char *sas_parse_pr_out_transport_id(
struct se_portal_group *se_tpg,
const char *buf,
u32 *out_tid_len,
char **port_nexus_ptr)
{
/*
* Assume the FORMAT CODE 00b from spc4r17, 7.5.4.7 TransportID
* for initiator ports using SCSI over SAS Serial SCSI Protocol
*
* The TransportID for a SAS Initiator Port is of fixed size of
* 24 bytes, and SAS does not contain a I_T nexus identifier,
* so we return the **port_nexus_ptr set to NULL.
*/
*port_nexus_ptr = NULL;
*out_tid_len = 24;
return (char *)&buf[4];
}
EXPORT_SYMBOL(sas_parse_pr_out_transport_id);
/*
* Handlers for Fibre Channel Protocol (FCP)
*/
u8 fc_get_fabric_proto_ident(struct se_portal_group *se_tpg)
{
return 0x0; /* 0 = fcp-2 per SPC4 section 7.5.1 */
}
EXPORT_SYMBOL(fc_get_fabric_proto_ident);
u32 fc_get_pr_transport_id_len(
struct se_portal_group *se_tpg,
struct se_node_acl *se_nacl,
struct t10_pr_registration *pr_reg,
int *format_code)
{
*format_code = 0;
/*
* The FC Transport ID is a hardcoded 24-byte length
*/
return 24;
}
EXPORT_SYMBOL(fc_get_pr_transport_id_len);
u32 fc_get_pr_transport_id(
struct se_portal_group *se_tpg,
struct se_node_acl *se_nacl,
struct t10_pr_registration *pr_reg,
int *format_code,
unsigned char *buf)
{
unsigned char binary, *ptr;
int i;
u32 off = 8;
/*
* PROTOCOL IDENTIFIER is 0h for FCP-2
*
* From spc4r17, 7.5.4.2 TransportID for initiator ports using
* SCSI over Fibre Channel
*
* We convert the ASCII formatted N Port name into a binary
* encoded TransportID.
*/
ptr = &se_nacl->initiatorname[0];
for (i = 0; i < 24; ) {
if (!(strncmp(&ptr[i], ":", 1))) {
i++;
continue;
}
binary = transport_asciihex_to_binaryhex(&ptr[i]);
buf[off++] = binary;
i += 2;
}
/*
* The FC Transport ID is a hardcoded 24-byte length
*/
return 24;
}
EXPORT_SYMBOL(fc_get_pr_transport_id);
char *fc_parse_pr_out_transport_id(
struct se_portal_group *se_tpg,
const char *buf,
u32 *out_tid_len,
char **port_nexus_ptr)
{
/*
* The TransportID for a FC N Port is of fixed size of
* 24 bytes, and FC does not contain a I_T nexus identifier,
* so we return the **port_nexus_ptr set to NULL.
*/
*port_nexus_ptr = NULL;
*out_tid_len = 24;
return (char *)&buf[8];
}
EXPORT_SYMBOL(fc_parse_pr_out_transport_id);
/*
* Handlers for Internet Small Computer Systems Interface (iSCSI)
*/
u8 iscsi_get_fabric_proto_ident(struct se_portal_group *se_tpg)
{
/*
* This value is defined for "Internet SCSI (iSCSI)"
* in spc4r17 section 7.5.1 Table 362
*/
return 0x5;
}
EXPORT_SYMBOL(iscsi_get_fabric_proto_ident);
u32 iscsi_get_pr_transport_id(
struct se_portal_group *se_tpg,
struct se_node_acl *se_nacl,
struct t10_pr_registration *pr_reg,
int *format_code,
unsigned char *buf)
{
u32 off = 4, padding = 0;
u16 len = 0;
spin_lock_irq(&se_nacl->nacl_sess_lock);
/*
* Set PROTOCOL IDENTIFIER to 5h for iSCSI
*/
buf[0] = 0x05;
/*
* From spc4r17 Section 7.5.4.6: TransportID for initiator
* ports using SCSI over iSCSI.
*
* The null-terminated, null-padded (see 4.4.2) ISCSI NAME field
* shall contain the iSCSI name of an iSCSI initiator node (see
* RFC 3720). The first ISCSI NAME field byte containing an ASCII
* null character terminates the ISCSI NAME field without regard for
* the specified length of the iSCSI TransportID or the contents of
* the ADDITIONAL LENGTH field.
*/
len = sprintf(&buf[off], "%s", se_nacl->initiatorname);
/*
* Add Extra byte for NULL terminator
*/
len++;
/*
* If there is ISID present with the registration and *format code == 1
* 1, use iSCSI Initiator port TransportID format.
*
* Otherwise use iSCSI Initiator device TransportID format that
* does not contain the ASCII encoded iSCSI Initiator iSID value
* provied by the iSCSi Initiator during the iSCSI login process.
*/
if ((*format_code == 1) && (pr_reg->isid_present_at_reg)) {
/*
* Set FORMAT CODE 01b for iSCSI Initiator port TransportID
* format.
*/
buf[0] |= 0x40;
/*
* From spc4r17 Section 7.5.4.6: TransportID for initiator
* ports using SCSI over iSCSI. Table 390
*
* The SEPARATOR field shall contain the five ASCII
* characters ",i,0x".
*
* The null-terminated, null-padded ISCSI INITIATOR SESSION ID
* field shall contain the iSCSI initiator session identifier
* (see RFC 3720) in the form of ASCII characters that are the
* hexadecimal digits converted from the binary iSCSI initiator
* session identifier value. The first ISCSI INITIATOR SESSION
* ID field byte containing an ASCII null character
*/
buf[off+len] = 0x2c; off++; /* ASCII Character: "," */
buf[off+len] = 0x69; off++; /* ASCII Character: "i" */
buf[off+len] = 0x2c; off++; /* ASCII Character: "," */
buf[off+len] = 0x30; off++; /* ASCII Character: "0" */
buf[off+len] = 0x78; off++; /* ASCII Character: "x" */
len += 5;
buf[off+len] = pr_reg->pr_reg_isid[0]; off++;
buf[off+len] = pr_reg->pr_reg_isid[1]; off++;
buf[off+len] = pr_reg->pr_reg_isid[2]; off++;
buf[off+len] = pr_reg->pr_reg_isid[3]; off++;
buf[off+len] = pr_reg->pr_reg_isid[4]; off++;
buf[off+len] = pr_reg->pr_reg_isid[5]; off++;
buf[off+len] = '\0'; off++;
len += 7;
}
spin_unlock_irq(&se_nacl->nacl_sess_lock);
/*
* The ADDITIONAL LENGTH field specifies the number of bytes that follow
* in the TransportID. The additional length shall be at least 20 and
* shall be a multiple of four.
*/
padding = ((-len) & 3);
if (padding != 0)
len += padding;
buf[2] = ((len >> 8) & 0xff);
buf[3] = (len & 0xff);
/*
* Increment value for total payload + header length for
* full status descriptor
*/
len += 4;
return len;
}
EXPORT_SYMBOL(iscsi_get_pr_transport_id);
u32 iscsi_get_pr_transport_id_len(
struct se_portal_group *se_tpg,
struct se_node_acl *se_nacl,
struct t10_pr_registration *pr_reg,
int *format_code)
{
u32 len = 0, padding = 0;
spin_lock_irq(&se_nacl->nacl_sess_lock);
len = strlen(se_nacl->initiatorname);
/*
* Add extra byte for NULL terminator
*/
len++;
/*
* If there is ISID present with the registration, use format code:
* 01b: iSCSI Initiator port TransportID format
*
* If there is not an active iSCSI session, use format code:
* 00b: iSCSI Initiator device TransportID format
*/
if (pr_reg->isid_present_at_reg) {
len += 5; /* For ",i,0x" ASCII seperator */
len += 7; /* For iSCSI Initiator Session ID + Null terminator */
*format_code = 1;
} else
*format_code = 0;
spin_unlock_irq(&se_nacl->nacl_sess_lock);
/*
* The ADDITIONAL LENGTH field specifies the number of bytes that follow
* in the TransportID. The additional length shall be at least 20 and
* shall be a multiple of four.
*/
padding = ((-len) & 3);
if (padding != 0)
len += padding;
/*
* Increment value for total payload + header length for
* full status descriptor
*/
len += 4;
return len;
}
EXPORT_SYMBOL(iscsi_get_pr_transport_id_len);
char *iscsi_parse_pr_out_transport_id(
struct se_portal_group *se_tpg,
const char *buf,
u32 *out_tid_len,
char **port_nexus_ptr)
{
char *p;
u32 tid_len, padding;
int i;
u16 add_len;
u8 format_code = (buf[0] & 0xc0);
/*
* Check for FORMAT CODE 00b or 01b from spc4r17, section 7.5.4.6:
*
* TransportID for initiator ports using SCSI over iSCSI,
* from Table 388 -- iSCSI TransportID formats.
*
* 00b Initiator port is identified using the world wide unique
* SCSI device name of the iSCSI initiator
* device containing the initiator port (see table 389).
* 01b Initiator port is identified using the world wide unique
* initiator port identifier (see table 390).10b to 11b
* Reserved
*/
if ((format_code != 0x00) && (format_code != 0x40)) {
printk(KERN_ERR "Illegal format code: 0x%02x for iSCSI"
" Initiator Transport ID\n", format_code);
return NULL;
}
/*
* If the caller wants the TransportID Length, we set that value for the
* entire iSCSI Tarnsport ID now.
*/
if (out_tid_len != NULL) {
add_len = ((buf[2] >> 8) & 0xff);
add_len |= (buf[3] & 0xff);
tid_len = strlen((char *)&buf[4]);
tid_len += 4; /* Add four bytes for iSCSI Transport ID header */
tid_len += 1; /* Add one byte for NULL terminator */
padding = ((-tid_len) & 3);
if (padding != 0)
tid_len += padding;
if ((add_len + 4) != tid_len) {
printk(KERN_INFO "LIO-Target Extracted add_len: %hu "
"does not match calculated tid_len: %u,"
" using tid_len instead\n", add_len+4, tid_len);
*out_tid_len = tid_len;
} else
*out_tid_len = (add_len + 4);
}
/*
* Check for ',i,0x' seperator between iSCSI Name and iSCSI Initiator
* Session ID as defined in Table 390 - iSCSI initiator port TransportID
* format.
*/
if (format_code == 0x40) {
p = strstr((char *)&buf[4], ",i,0x");
if (!(p)) {
printk(KERN_ERR "Unable to locate \",i,0x\" seperator"
" for Initiator port identifier: %s\n",
(char *)&buf[4]);
return NULL;
}
*p = '\0'; /* Terminate iSCSI Name */
p += 5; /* Skip over ",i,0x" seperator */
*port_nexus_ptr = p;
/*
* Go ahead and do the lower case conversion of the received
* 12 ASCII characters representing the ISID in the TransportID
* for comparision against the running iSCSI session's ISID from
* iscsi_target.c:lio_sess_get_initiator_sid()
*/
for (i = 0; i < 12; i++) {
if (isdigit(*p)) {
p++;
continue;
}
*p = tolower(*p);
p++;
}
}
return (char *)&buf[4];
}
EXPORT_SYMBOL(iscsi_parse_pr_out_transport_id);

688
drivers/target/target_core_file.c Normal file
View File

@ -0,0 +1,688 @@
/*******************************************************************************
* Filename: target_core_file.c
*
* This file contains the Storage Engine <-> FILEIO transport specific functions
*
* Copyright (c) 2005 PyX Technologies, Inc.
* Copyright (c) 2005-2006 SBE, Inc. All Rights Reserved.
* Copyright (c) 2007-2010 Rising Tide Systems
* Copyright (c) 2008-2010 Linux-iSCSI.org
*
* Nicholas A. Bellinger <nab@kernel.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
******************************************************************************/
#include <linux/version.h>
#include <linux/string.h>
#include <linux/parser.h>
#include <linux/timer.h>
#include <linux/blkdev.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/smp_lock.h>
#include <scsi/scsi.h>
#include <scsi/scsi_host.h>
#include <target/target_core_base.h>
#include <target/target_core_device.h>
#include <target/target_core_transport.h>
#include "target_core_file.h"
#if 1
#define DEBUG_FD_CACHE(x...) printk(x)
#else
#define DEBUG_FD_CACHE(x...)
#endif
#if 1
#define DEBUG_FD_FUA(x...) printk(x)
#else
#define DEBUG_FD_FUA(x...)
#endif
static struct se_subsystem_api fileio_template;
/* fd_attach_hba(): (Part of se_subsystem_api_t template)
*
*
*/
static int fd_attach_hba(struct se_hba *hba, u32 host_id)
{
struct fd_host *fd_host;
fd_host = kzalloc(sizeof(struct fd_host), GFP_KERNEL);
if (!(fd_host)) {
printk(KERN_ERR "Unable to allocate memory for struct fd_host\n");
return -1;
}
fd_host->fd_host_id = host_id;
atomic_set(&hba->left_queue_depth, FD_HBA_QUEUE_DEPTH);
atomic_set(&hba->max_queue_depth, FD_HBA_QUEUE_DEPTH);
hba->hba_ptr = (void *) fd_host;
printk(KERN_INFO "CORE_HBA[%d] - TCM FILEIO HBA Driver %s on Generic"
" Target Core Stack %s\n", hba->hba_id, FD_VERSION,
TARGET_CORE_MOD_VERSION);
printk(KERN_INFO "CORE_HBA[%d] - Attached FILEIO HBA: %u to Generic"
" Target Core with TCQ Depth: %d MaxSectors: %u\n",
hba->hba_id, fd_host->fd_host_id,
atomic_read(&hba->max_queue_depth), FD_MAX_SECTORS);
return 0;
}
static void fd_detach_hba(struct se_hba *hba)
{
struct fd_host *fd_host = hba->hba_ptr;
printk(KERN_INFO "CORE_HBA[%d] - Detached FILEIO HBA: %u from Generic"
" Target Core\n", hba->hba_id, fd_host->fd_host_id);
kfree(fd_host);
hba->hba_ptr = NULL;
}
static void *fd_allocate_virtdevice(struct se_hba *hba, const char *name)
{
struct fd_dev *fd_dev;
struct fd_host *fd_host = (struct fd_host *) hba->hba_ptr;
fd_dev = kzalloc(sizeof(struct fd_dev), GFP_KERNEL);
if (!(fd_dev)) {
printk(KERN_ERR "Unable to allocate memory for struct fd_dev\n");
return NULL;
}
fd_dev->fd_host = fd_host;
printk(KERN_INFO "FILEIO: Allocated fd_dev for %p\n", name);
return fd_dev;
}
/* fd_create_virtdevice(): (Part of se_subsystem_api_t template)
*
*
*/
static struct se_device *fd_create_virtdevice(
struct se_hba *hba,
struct se_subsystem_dev *se_dev,
void *p)
{
char *dev_p = NULL;
struct se_device *dev;
struct se_dev_limits dev_limits;
struct queue_limits *limits;
struct fd_dev *fd_dev = (struct fd_dev *) p;
struct fd_host *fd_host = (struct fd_host *) hba->hba_ptr;
mm_segment_t old_fs;
struct file *file;
struct inode *inode = NULL;
int dev_flags = 0, flags;
memset(&dev_limits, 0, sizeof(struct se_dev_limits));
old_fs = get_fs();
set_fs(get_ds());
dev_p = getname(fd_dev->fd_dev_name);
set_fs(old_fs);
if (IS_ERR(dev_p)) {
printk(KERN_ERR "getname(%s) failed: %lu\n",
fd_dev->fd_dev_name, IS_ERR(dev_p));
goto fail;
}
#if 0
if (di->no_create_file)
flags = O_RDWR | O_LARGEFILE;
else
flags = O_RDWR | O_CREAT | O_LARGEFILE;
#else
flags = O_RDWR | O_CREAT | O_LARGEFILE;
#endif
/* flags |= O_DIRECT; */
/*
* If fd_buffered_io=1 has not been set explictly (the default),
* use O_SYNC to force FILEIO writes to disk.
*/
if (!(fd_dev->fbd_flags & FDBD_USE_BUFFERED_IO))
flags |= O_SYNC;
file = filp_open(dev_p, flags, 0600);
if (IS_ERR(file) || !file || !file->f_dentry) {
printk(KERN_ERR "filp_open(%s) failed\n", dev_p);
goto fail;
}
fd_dev->fd_file = file;
/*
* If using a block backend with this struct file, we extract
* fd_dev->fd_[block,dev]_size from struct block_device.
*
* Otherwise, we use the passed fd_size= from configfs
*/
inode = file->f_mapping->host;
if (S_ISBLK(inode->i_mode)) {
struct request_queue *q;
/*
* Setup the local scope queue_limits from struct request_queue->limits
* to pass into transport_add_device_to_core_hba() as struct se_dev_limits.
*/
q = bdev_get_queue(inode->i_bdev);
limits = &dev_limits.limits;
limits->logical_block_size = bdev_logical_block_size(inode->i_bdev);
limits->max_hw_sectors = queue_max_hw_sectors(q);
limits->max_sectors = queue_max_sectors(q);
/*
* Determine the number of bytes from i_size_read() minus
* one (1) logical sector from underlying struct block_device
*/
fd_dev->fd_block_size = bdev_logical_block_size(inode->i_bdev);
fd_dev->fd_dev_size = (i_size_read(file->f_mapping->host) -
fd_dev->fd_block_size);
printk(KERN_INFO "FILEIO: Using size: %llu bytes from struct"
" block_device blocks: %llu logical_block_size: %d\n",
fd_dev->fd_dev_size,
div_u64(fd_dev->fd_dev_size, fd_dev->fd_block_size),
fd_dev->fd_block_size);
} else {
if (!(fd_dev->fbd_flags & FBDF_HAS_SIZE)) {
printk(KERN_ERR "FILEIO: Missing fd_dev_size="
" parameter, and no backing struct"
" block_device\n");
goto fail;
}
limits = &dev_limits.limits;
limits->logical_block_size = FD_BLOCKSIZE;
limits->max_hw_sectors = FD_MAX_SECTORS;
limits->max_sectors = FD_MAX_SECTORS;
fd_dev->fd_block_size = FD_BLOCKSIZE;
}
dev_limits.hw_queue_depth = FD_MAX_DEVICE_QUEUE_DEPTH;
dev_limits.queue_depth = FD_DEVICE_QUEUE_DEPTH;
dev = transport_add_device_to_core_hba(hba, &fileio_template,
se_dev, dev_flags, (void *)fd_dev,
&dev_limits, "FILEIO", FD_VERSION);
if (!(dev))
goto fail;
fd_dev->fd_dev_id = fd_host->fd_host_dev_id_count++;
fd_dev->fd_queue_depth = dev->queue_depth;
printk(KERN_INFO "CORE_FILE[%u] - Added TCM FILEIO Device ID: %u at %s,"
" %llu total bytes\n", fd_host->fd_host_id, fd_dev->fd_dev_id,
fd_dev->fd_dev_name, fd_dev->fd_dev_size);
putname(dev_p);
return dev;
fail:
if (fd_dev->fd_file) {
filp_close(fd_dev->fd_file, NULL);
fd_dev->fd_file = NULL;
}
putname(dev_p);
return NULL;
}
/* fd_free_device(): (Part of se_subsystem_api_t template)
*
*
*/
static void fd_free_device(void *p)
{
struct fd_dev *fd_dev = (struct fd_dev *) p;
if (fd_dev->fd_file) {
filp_close(fd_dev->fd_file, NULL);
fd_dev->fd_file = NULL;
}
kfree(fd_dev);
}
static inline struct fd_request *FILE_REQ(struct se_task *task)
{
return container_of(task, struct fd_request, fd_task);
}
static struct se_task *
fd_alloc_task(struct se_cmd *cmd)
{
struct fd_request *fd_req;
fd_req = kzalloc(sizeof(struct fd_request), GFP_KERNEL);
if (!(fd_req)) {
printk(KERN_ERR "Unable to allocate struct fd_request\n");
return NULL;
}
fd_req->fd_dev = SE_DEV(cmd)->dev_ptr;
return &fd_req->fd_task;
}
static int fd_do_readv(struct se_task *task)
{
struct fd_request *req = FILE_REQ(task);
struct file *fd = req->fd_dev->fd_file;
struct scatterlist *sg = task->task_sg;
struct iovec *iov;
mm_segment_t old_fs;
loff_t pos = (task->task_lba * DEV_ATTRIB(task->se_dev)->block_size);
int ret = 0, i;
iov = kzalloc(sizeof(struct iovec) * task->task_sg_num, GFP_KERNEL);
if (!(iov)) {
printk(KERN_ERR "Unable to allocate fd_do_readv iov[]\n");
return -1;
}
for (i = 0; i < task->task_sg_num; i++) {
iov[i].iov_len = sg[i].length;
iov[i].iov_base = sg_virt(&sg[i]);
}
old_fs = get_fs();
set_fs(get_ds());
ret = vfs_readv(fd, &iov[0], task->task_sg_num, &pos);
set_fs(old_fs);
kfree(iov);
/*
* Return zeros and GOOD status even if the READ did not return
* the expected virt_size for struct file w/o a backing struct
* block_device.
*/
if (S_ISBLK(fd->f_dentry->d_inode->i_mode)) {
if (ret < 0 || ret != task->task_size) {
printk(KERN_ERR "vfs_readv() returned %d,"
" expecting %d for S_ISBLK\n", ret,
(int)task->task_size);
return -1;
}
} else {
if (ret < 0) {
printk(KERN_ERR "vfs_readv() returned %d for non"
" S_ISBLK\n", ret);
return -1;
}
}
return 1;
}
static int fd_do_writev(struct se_task *task)
{
struct fd_request *req = FILE_REQ(task);
struct file *fd = req->fd_dev->fd_file;
struct scatterlist *sg = task->task_sg;
struct iovec *iov;
mm_segment_t old_fs;
loff_t pos = (task->task_lba * DEV_ATTRIB(task->se_dev)->block_size);
int ret, i = 0;
iov = kzalloc(sizeof(struct iovec) * task->task_sg_num, GFP_KERNEL);
if (!(iov)) {
printk(KERN_ERR "Unable to allocate fd_do_writev iov[]\n");
return -1;
}
for (i = 0; i < task->task_sg_num; i++) {
iov[i].iov_len = sg[i].length;
iov[i].iov_base = sg_virt(&sg[i]);
}
old_fs = get_fs();
set_fs(get_ds());
ret = vfs_writev(fd, &iov[0], task->task_sg_num, &pos);
set_fs(old_fs);
kfree(iov);
if (ret < 0 || ret != task->task_size) {
printk(KERN_ERR "vfs_writev() returned %d\n", ret);
return -1;
}
return 1;
}
static void fd_emulate_sync_cache(struct se_task *task)
{
struct se_cmd *cmd = TASK_CMD(task);
struct se_device *dev = cmd->se_dev;
struct fd_dev *fd_dev = dev->dev_ptr;
int immed = (cmd->t_task->t_task_cdb[1] & 0x2);
loff_t start, end;
int ret;
/*
* If the Immediate bit is set, queue up the GOOD response
* for this SYNCHRONIZE_CACHE op
*/
if (immed)
transport_complete_sync_cache(cmd, 1);
/*
* Determine if we will be flushing the entire device.
*/
if (cmd->t_task->t_task_lba == 0 && cmd->data_length == 0) {
start = 0;
end = LLONG_MAX;
} else {
start = cmd->t_task->t_task_lba * DEV_ATTRIB(dev)->block_size;
if (cmd->data_length)
end = start + cmd->data_length;
else
end = LLONG_MAX;
}
ret = vfs_fsync_range(fd_dev->fd_file, start, end, 1);
if (ret != 0)
printk(KERN_ERR "FILEIO: vfs_fsync_range() failed: %d\n", ret);
if (!immed)
transport_complete_sync_cache(cmd, ret == 0);
}
/*
* Tell TCM Core that we are capable of WriteCache emulation for
* an underlying struct se_device.
*/
static int fd_emulated_write_cache(struct se_device *dev)
{
return 1;
}
static int fd_emulated_dpo(struct se_device *dev)
{
return 0;
}
/*
* Tell TCM Core that we will be emulating Forced Unit Access (FUA) for WRITEs
* for TYPE_DISK.
*/
static int fd_emulated_fua_write(struct se_device *dev)
{
return 1;
}
static int fd_emulated_fua_read(struct se_device *dev)
{
return 0;
}
/*
* WRITE Force Unit Access (FUA) emulation on a per struct se_task
* LBA range basis..
*/
static void fd_emulate_write_fua(struct se_cmd *cmd, struct se_task *task)
{
struct se_device *dev = cmd->se_dev;
struct fd_dev *fd_dev = dev->dev_ptr;
loff_t start = task->task_lba * DEV_ATTRIB(dev)->block_size;
loff_t end = start + task->task_size;
int ret;
DEBUG_FD_CACHE("FILEIO: FUA WRITE LBA: %llu, bytes: %u\n",
task->task_lba, task->task_size);
ret = vfs_fsync_range(fd_dev->fd_file, start, end, 1);
if (ret != 0)
printk(KERN_ERR "FILEIO: vfs_fsync_range() failed: %d\n", ret);
}
static int fd_do_task(struct se_task *task)
{
struct se_cmd *cmd = task->task_se_cmd;
struct se_device *dev = cmd->se_dev;
int ret = 0;
/*
* Call vectorized fileio functions to map struct scatterlist
* physical memory addresses to struct iovec virtual memory.
*/
if (task->task_data_direction == DMA_FROM_DEVICE) {
ret = fd_do_readv(task);
} else {
ret = fd_do_writev(task);
if (ret > 0 &&
DEV_ATTRIB(dev)->emulate_write_cache > 0 &&
DEV_ATTRIB(dev)->emulate_fua_write > 0 &&
T_TASK(cmd)->t_tasks_fua) {
/*
* We might need to be a bit smarter here
* and return some sense data to let the initiator
* know the FUA WRITE cache sync failed..?
*/
fd_emulate_write_fua(cmd, task);
}
}
if (ret < 0)
return ret;
if (ret) {
task->task_scsi_status = GOOD;
transport_complete_task(task, 1);
}
return PYX_TRANSPORT_SENT_TO_TRANSPORT;
}
/* fd_free_task(): (Part of se_subsystem_api_t template)
*
*
*/
static void fd_free_task(struct se_task *task)
{
struct fd_request *req = FILE_REQ(task);
kfree(req);
}
enum {
Opt_fd_dev_name, Opt_fd_dev_size, Opt_fd_buffered_io, Opt_err
};
static match_table_t tokens = {
{Opt_fd_dev_name, "fd_dev_name=%s"},
{Opt_fd_dev_size, "fd_dev_size=%s"},
{Opt_fd_buffered_io, "fd_buffered_id=%d"},
{Opt_err, NULL}
};
static ssize_t fd_set_configfs_dev_params(
struct se_hba *hba,
struct se_subsystem_dev *se_dev,
const char *page, ssize_t count)
{
struct fd_dev *fd_dev = se_dev->se_dev_su_ptr;
char *orig, *ptr, *arg_p, *opts;
substring_t args[MAX_OPT_ARGS];
int ret = 0, arg, token;
opts = kstrdup(page, GFP_KERNEL);
if (!opts)
return -ENOMEM;
orig = opts;
while ((ptr = strsep(&opts, ",")) != NULL) {
if (!*ptr)
continue;
token = match_token(ptr, tokens, args);
switch (token) {
case Opt_fd_dev_name:
snprintf(fd_dev->fd_dev_name, FD_MAX_DEV_NAME,
"%s", match_strdup(&args[0]));
printk(KERN_INFO "FILEIO: Referencing Path: %s\n",
fd_dev->fd_dev_name);
fd_dev->fbd_flags |= FBDF_HAS_PATH;
break;
case Opt_fd_dev_size:
arg_p = match_strdup(&args[0]);
ret = strict_strtoull(arg_p, 0, &fd_dev->fd_dev_size);
if (ret < 0) {
printk(KERN_ERR "strict_strtoull() failed for"
" fd_dev_size=\n");
goto out;
}
printk(KERN_INFO "FILEIO: Referencing Size: %llu"
" bytes\n", fd_dev->fd_dev_size);
fd_dev->fbd_flags |= FBDF_HAS_SIZE;
break;
case Opt_fd_buffered_io:
match_int(args, &arg);
if (arg != 1) {
printk(KERN_ERR "bogus fd_buffered_io=%d value\n", arg);
ret = -EINVAL;
goto out;
}
printk(KERN_INFO "FILEIO: Using buffered I/O"
" operations for struct fd_dev\n");
fd_dev->fbd_flags |= FDBD_USE_BUFFERED_IO;
break;
default:
break;
}
}
out:
kfree(orig);
return (!ret) ? count : ret;
}
static ssize_t fd_check_configfs_dev_params(struct se_hba *hba, struct se_subsystem_dev *se_dev)
{
struct fd_dev *fd_dev = (struct fd_dev *) se_dev->se_dev_su_ptr;
if (!(fd_dev->fbd_flags & FBDF_HAS_PATH)) {
printk(KERN_ERR "Missing fd_dev_name=\n");
return -1;
}
return 0;
}
static ssize_t fd_show_configfs_dev_params(
struct se_hba *hba,
struct se_subsystem_dev *se_dev,
char *b)
{
struct fd_dev *fd_dev = se_dev->se_dev_su_ptr;
ssize_t bl = 0;
bl = sprintf(b + bl, "TCM FILEIO ID: %u", fd_dev->fd_dev_id);
bl += sprintf(b + bl, " File: %s Size: %llu Mode: %s\n",
fd_dev->fd_dev_name, fd_dev->fd_dev_size,
(fd_dev->fbd_flags & FDBD_USE_BUFFERED_IO) ?
"Buffered" : "Synchronous");
return bl;
}
/* fd_get_cdb(): (Part of se_subsystem_api_t template)
*
*
*/
static unsigned char *fd_get_cdb(struct se_task *task)
{
struct fd_request *req = FILE_REQ(task);
return req->fd_scsi_cdb;
}
/* fd_get_device_rev(): (Part of se_subsystem_api_t template)
*
*
*/
static u32 fd_get_device_rev(struct se_device *dev)
{
return SCSI_SPC_2; /* Returns SPC-3 in Initiator Data */
}
/* fd_get_device_type(): (Part of se_subsystem_api_t template)
*
*
*/
static u32 fd_get_device_type(struct se_device *dev)
{
return TYPE_DISK;
}
static sector_t fd_get_blocks(struct se_device *dev)
{
struct fd_dev *fd_dev = dev->dev_ptr;
unsigned long long blocks_long = div_u64(fd_dev->fd_dev_size,
DEV_ATTRIB(dev)->block_size);
return blocks_long;
}
static struct se_subsystem_api fileio_template = {
.name = "fileio",
.owner = THIS_MODULE,
.transport_type = TRANSPORT_PLUGIN_VHBA_PDEV,
.attach_hba = fd_attach_hba,
.detach_hba = fd_detach_hba,
.allocate_virtdevice = fd_allocate_virtdevice,
.create_virtdevice = fd_create_virtdevice,
.free_device = fd_free_device,
.dpo_emulated = fd_emulated_dpo,
.fua_write_emulated = fd_emulated_fua_write,
.fua_read_emulated = fd_emulated_fua_read,
.write_cache_emulated = fd_emulated_write_cache,
.alloc_task = fd_alloc_task,
.do_task = fd_do_task,
.do_sync_cache = fd_emulate_sync_cache,
.free_task = fd_free_task,
.check_configfs_dev_params = fd_check_configfs_dev_params,
.set_configfs_dev_params = fd_set_configfs_dev_params,
.show_configfs_dev_params = fd_show_configfs_dev_params,
.get_cdb = fd_get_cdb,
.get_device_rev = fd_get_device_rev,
.get_device_type = fd_get_device_type,
.get_blocks = fd_get_blocks,
};
static int __init fileio_module_init(void)
{
return transport_subsystem_register(&fileio_template);
}
static void fileio_module_exit(void)
{
transport_subsystem_release(&fileio_template);
}
MODULE_DESCRIPTION("TCM FILEIO subsystem plugin");
MODULE_AUTHOR("nab@Linux-iSCSI.org");
MODULE_LICENSE("GPL");
module_init(fileio_module_init);
module_exit(fileio_module_exit);

50
drivers/target/target_core_file.h Normal file
View File

@ -0,0 +1,50 @@
#ifndef TARGET_CORE_FILE_H
#define TARGET_CORE_FILE_H
#define FD_VERSION "4.0"
#define FD_MAX_DEV_NAME 256
/* Maximum queuedepth for the FILEIO HBA */
#define FD_HBA_QUEUE_DEPTH 256
#define FD_DEVICE_QUEUE_DEPTH 32
#define FD_MAX_DEVICE_QUEUE_DEPTH 128
#define FD_BLOCKSIZE 512
#define FD_MAX_SECTORS 1024
#define RRF_EMULATE_CDB 0x01
#define RRF_GOT_LBA 0x02
struct fd_request {
struct se_task fd_task;
/* SCSI CDB from iSCSI Command PDU */
unsigned char fd_scsi_cdb[TCM_MAX_COMMAND_SIZE];
/* FILEIO device */
struct fd_dev *fd_dev;
} ____cacheline_aligned;
#define FBDF_HAS_PATH 0x01
#define FBDF_HAS_SIZE 0x02
#define FDBD_USE_BUFFERED_IO 0x04
struct fd_dev {
u32 fbd_flags;
unsigned char fd_dev_name[FD_MAX_DEV_NAME];
/* Unique Ramdisk Device ID in Ramdisk HBA */
u32 fd_dev_id;
/* Number of SG tables in sg_table_array */
u32 fd_table_count;
u32 fd_queue_depth;
u32 fd_block_size;
unsigned long long fd_dev_size;
struct file *fd_file;
/* FILEIO HBA device is connected to */
struct fd_host *fd_host;
} ____cacheline_aligned;
struct fd_host {
u32 fd_host_dev_id_count;
/* Unique FILEIO Host ID */
u32 fd_host_id;
} ____cacheline_aligned;
#endif /* TARGET_CORE_FILE_H */

185
drivers/target/target_core_hba.c Normal file
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@ -0,0 +1,185 @@
/*******************************************************************************
* Filename: target_core_hba.c
*
* This file copntains the iSCSI HBA Transport related functions.
*
* Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc.
* Copyright (c) 2005, 2006, 2007 SBE, Inc.
* Copyright (c) 2007-2010 Rising Tide Systems
* Copyright (c) 2008-2010 Linux-iSCSI.org
*
* Nicholas A. Bellinger <nab@kernel.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
******************************************************************************/
#include <linux/net.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/smp_lock.h>
#include <linux/in.h>
#include <net/sock.h>
#include <net/tcp.h>
#include <target/target_core_base.h>
#include <target/target_core_device.h>
#include <target/target_core_device.h>
#include <target/target_core_tpg.h>
#include <target/target_core_transport.h>
#include "target_core_hba.h"
static LIST_HEAD(subsystem_list);
static DEFINE_MUTEX(subsystem_mutex);
int transport_subsystem_register(struct se_subsystem_api *sub_api)
{
struct se_subsystem_api *s;
INIT_LIST_HEAD(&sub_api->sub_api_list);
mutex_lock(&subsystem_mutex);
list_for_each_entry(s, &subsystem_list, sub_api_list) {
if (!(strcmp(s->name, sub_api->name))) {
printk(KERN_ERR "%p is already registered with"
" duplicate name %s, unable to process"
" request\n", s, s->name);
mutex_unlock(&subsystem_mutex);
return -EEXIST;
}
}
list_add_tail(&sub_api->sub_api_list, &subsystem_list);
mutex_unlock(&subsystem_mutex);
printk(KERN_INFO "TCM: Registered subsystem plugin: %s struct module:"
" %p\n", sub_api->name, sub_api->owner);
return 0;
}
EXPORT_SYMBOL(transport_subsystem_register);
void transport_subsystem_release(struct se_subsystem_api *sub_api)
{
mutex_lock(&subsystem_mutex);
list_del(&sub_api->sub_api_list);
mutex_unlock(&subsystem_mutex);
}
EXPORT_SYMBOL(transport_subsystem_release);
static struct se_subsystem_api *core_get_backend(const char *sub_name)
{
struct se_subsystem_api *s;
mutex_lock(&subsystem_mutex);
list_for_each_entry(s, &subsystem_list, sub_api_list) {
if (!strcmp(s->name, sub_name))
goto found;
}
mutex_unlock(&subsystem_mutex);
return NULL;
found:
if (s->owner && !try_module_get(s->owner))
s = NULL;
mutex_unlock(&subsystem_mutex);
return s;
}
struct se_hba *
core_alloc_hba(const char *plugin_name, u32 plugin_dep_id, u32 hba_flags)
{
struct se_hba *hba;
int ret = 0;
hba = kzalloc(sizeof(*hba), GFP_KERNEL);
if (!hba) {
printk(KERN_ERR "Unable to allocate struct se_hba\n");
return ERR_PTR(-ENOMEM);
}
INIT_LIST_HEAD(&hba->hba_dev_list);
spin_lock_init(&hba->device_lock);
spin_lock_init(&hba->hba_queue_lock);
mutex_init(&hba->hba_access_mutex);
hba->hba_index = scsi_get_new_index(SCSI_INST_INDEX);
hba->hba_flags |= hba_flags;
atomic_set(&hba->max_queue_depth, 0);
atomic_set(&hba->left_queue_depth, 0);
hba->transport = core_get_backend(plugin_name);
if (!hba->transport) {
ret = -EINVAL;
goto out_free_hba;
}
ret = hba->transport->attach_hba(hba, plugin_dep_id);
if (ret < 0)
goto out_module_put;
spin_lock(&se_global->hba_lock);
hba->hba_id = se_global->g_hba_id_counter++;
list_add_tail(&hba->hba_list, &se_global->g_hba_list);
spin_unlock(&se_global->hba_lock);
printk(KERN_INFO "CORE_HBA[%d] - Attached HBA to Generic Target"
" Core\n", hba->hba_id);
return hba;
out_module_put:
if (hba->transport->owner)
module_put(hba->transport->owner);
hba->transport = NULL;
out_free_hba:
kfree(hba);
return ERR_PTR(ret);
}
int
core_delete_hba(struct se_hba *hba)
{
struct se_device *dev, *dev_tmp;
spin_lock(&hba->device_lock);
list_for_each_entry_safe(dev, dev_tmp, &hba->hba_dev_list, dev_list) {
se_clear_dev_ports(dev);
spin_unlock(&hba->device_lock);
se_release_device_for_hba(dev);
spin_lock(&hba->device_lock);
}
spin_unlock(&hba->device_lock);
hba->transport->detach_hba(hba);
spin_lock(&se_global->hba_lock);
list_del(&hba->hba_list);
spin_unlock(&se_global->hba_lock);
printk(KERN_INFO "CORE_HBA[%d] - Detached HBA from Generic Target"
" Core\n", hba->hba_id);
if (hba->transport->owner)
module_put(hba->transport->owner);
hba->transport = NULL;
kfree(hba);
return 0;
}

7
drivers/target/target_core_hba.h Normal file
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@ -0,0 +1,7 @@
#ifndef TARGET_CORE_HBA_H
#define TARGET_CORE_HBA_H
extern struct se_hba *core_alloc_hba(const char *, u32, u32);
extern int core_delete_hba(struct se_hba *);
#endif /* TARGET_CORE_HBA_H */

808
drivers/target/target_core_iblock.c Normal file
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@ -0,0 +1,808 @@
/*******************************************************************************
* Filename: target_core_iblock.c
*
* This file contains the Storage Engine <-> Linux BlockIO transport
* specific functions.
*
* Copyright (c) 2003, 2004, 2005 PyX Technologies, Inc.
* Copyright (c) 2005, 2006, 2007 SBE, Inc.
* Copyright (c) 2007-2010 Rising Tide Systems
* Copyright (c) 2008-2010 Linux-iSCSI.org
*
* Nicholas A. Bellinger <nab@kernel.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
******************************************************************************/
#include <linux/version.h>
#include <linux/string.h>
#include <linux/parser.h>
#include <linux/timer.h>
#include <linux/fs.h>
#include <linux/blkdev.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/smp_lock.h>
#include <linux/bio.h>
#include <linux/genhd.h>
#include <linux/file.h>
#include <scsi/scsi.h>
#include <scsi/scsi_host.h>
#include <target/target_core_base.h>
#include <target/target_core_device.h>
#include <target/target_core_transport.h>
#include "target_core_iblock.h"
#if 0
#define DEBUG_IBLOCK(x...) printk(x)
#else
#define DEBUG_IBLOCK(x...)
#endif
static struct se_subsystem_api iblock_template;
static void iblock_bio_done(struct bio *, int);
/* iblock_attach_hba(): (Part of se_subsystem_api_t template)
*
*
*/
static int iblock_attach_hba(struct se_hba *hba, u32 host_id)
{
struct iblock_hba *ib_host;
ib_host = kzalloc(sizeof(struct iblock_hba), GFP_KERNEL);
if (!(ib_host)) {
printk(KERN_ERR "Unable to allocate memory for"
" struct iblock_hba\n");
return -ENOMEM;
}
ib_host->iblock_host_id = host_id;
atomic_set(&hba->left_queue_depth, IBLOCK_HBA_QUEUE_DEPTH);
atomic_set(&hba->max_queue_depth, IBLOCK_HBA_QUEUE_DEPTH);
hba->hba_ptr = (void *) ib_host;
printk(KERN_INFO "CORE_HBA[%d] - TCM iBlock HBA Driver %s on"
" Generic Target Core Stack %s\n", hba->hba_id,
IBLOCK_VERSION, TARGET_CORE_MOD_VERSION);
printk(KERN_INFO "CORE_HBA[%d] - Attached iBlock HBA: %u to Generic"
" Target Core TCQ Depth: %d\n", hba->hba_id,
ib_host->iblock_host_id, atomic_read(&hba->max_queue_depth));
return 0;
}
static void iblock_detach_hba(struct se_hba *hba)
{
struct iblock_hba *ib_host = hba->hba_ptr;
printk(KERN_INFO "CORE_HBA[%d] - Detached iBlock HBA: %u from Generic"
" Target Core\n", hba->hba_id, ib_host->iblock_host_id);
kfree(ib_host);
hba->hba_ptr = NULL;
}
static void *iblock_allocate_virtdevice(struct se_hba *hba, const char *name)
{
struct iblock_dev *ib_dev = NULL;
struct iblock_hba *ib_host = hba->hba_ptr;
ib_dev = kzalloc(sizeof(struct iblock_dev), GFP_KERNEL);
if (!(ib_dev)) {
printk(KERN_ERR "Unable to allocate struct iblock_dev\n");
return NULL;
}
ib_dev->ibd_host = ib_host;
printk(KERN_INFO "IBLOCK: Allocated ib_dev for %s\n", name);
return ib_dev;
}
static struct se_device *iblock_create_virtdevice(
struct se_hba *hba,
struct se_subsystem_dev *se_dev,
void *p)
{
struct iblock_dev *ib_dev = p;
struct se_device *dev;
struct se_dev_limits dev_limits;
struct block_device *bd = NULL;
struct request_queue *q;
struct queue_limits *limits;
u32 dev_flags = 0;
if (!(ib_dev)) {
printk(KERN_ERR "Unable to locate struct iblock_dev parameter\n");
return 0;
}
memset(&dev_limits, 0, sizeof(struct se_dev_limits));
/*
* These settings need to be made tunable..
*/
ib_dev->ibd_bio_set = bioset_create(32, 64);
if (!(ib_dev->ibd_bio_set)) {
printk(KERN_ERR "IBLOCK: Unable to create bioset()\n");
return 0;
}
printk(KERN_INFO "IBLOCK: Created bio_set()\n");
/*
* iblock_check_configfs_dev_params() ensures that ib_dev->ibd_udev_path
* must already have been set in order for echo 1 > $HBA/$DEV/enable to run.
*/
printk(KERN_INFO "IBLOCK: Claiming struct block_device: %s\n",
ib_dev->ibd_udev_path);
bd = blkdev_get_by_path(ib_dev->ibd_udev_path,
FMODE_WRITE|FMODE_READ|FMODE_EXCL, ib_dev);
if (!(bd))
goto failed;
/*
* Setup the local scope queue_limits from struct request_queue->limits
* to pass into transport_add_device_to_core_hba() as struct se_dev_limits.
*/
q = bdev_get_queue(bd);
limits = &dev_limits.limits;
limits->logical_block_size = bdev_logical_block_size(bd);
limits->max_hw_sectors = queue_max_hw_sectors(q);
limits->max_sectors = queue_max_sectors(q);
dev_limits.hw_queue_depth = IBLOCK_MAX_DEVICE_QUEUE_DEPTH;
dev_limits.queue_depth = IBLOCK_DEVICE_QUEUE_DEPTH;
ib_dev->ibd_major = MAJOR(bd->bd_dev);
ib_dev->ibd_minor = MINOR(bd->bd_dev);
ib_dev->ibd_bd = bd;
dev = transport_add_device_to_core_hba(hba,
&iblock_template, se_dev, dev_flags, (void *)ib_dev,
&dev_limits, "IBLOCK", IBLOCK_VERSION);
if (!(dev))
goto failed;
ib_dev->ibd_depth = dev->queue_depth;
/*
* Check if the underlying struct block_device request_queue supports
* the QUEUE_FLAG_DISCARD bit for UNMAP/WRITE_SAME in SCSI + TRIM
* in ATA and we need to set TPE=1
*/
if (blk_queue_discard(bdev_get_queue(bd))) {
struct request_queue *q = bdev_get_queue(bd);
DEV_ATTRIB(dev)->max_unmap_lba_count =
q->limits.max_discard_sectors;
/*
* Currently hardcoded to 1 in Linux/SCSI code..
*/
DEV_ATTRIB(dev)->max_unmap_block_desc_count = 1;
DEV_ATTRIB(dev)->unmap_granularity =
q->limits.discard_granularity;
DEV_ATTRIB(dev)->unmap_granularity_alignment =
q->limits.discard_alignment;
printk(KERN_INFO "IBLOCK: BLOCK Discard support available,"
" disabled by default\n");
}
return dev;
failed:
if (ib_dev->ibd_bio_set) {
bioset_free(ib_dev->ibd_bio_set);
ib_dev->ibd_bio_set = NULL;
}
ib_dev->ibd_bd = NULL;
ib_dev->ibd_major = 0;
ib_dev->ibd_minor = 0;
return NULL;
}
static void iblock_free_device(void *p)
{
struct iblock_dev *ib_dev = p;
blkdev_put(ib_dev->ibd_bd, FMODE_WRITE|FMODE_READ|FMODE_EXCL);
bioset_free(ib_dev->ibd_bio_set);
kfree(ib_dev);
}
static inline struct iblock_req *IBLOCK_REQ(struct se_task *task)
{
return container_of(task, struct iblock_req, ib_task);
}
static struct se_task *
iblock_alloc_task(struct se_cmd *cmd)
{
struct iblock_req *ib_req;
ib_req = kzalloc(sizeof(struct iblock_req), GFP_KERNEL);
if (!(ib_req)) {
printk(KERN_ERR "Unable to allocate memory for struct iblock_req\n");
return NULL;
}
ib_req->ib_dev = SE_DEV(cmd)->dev_ptr;
atomic_set(&ib_req->ib_bio_cnt, 0);
return &ib_req->ib_task;
}
static unsigned long long iblock_emulate_read_cap_with_block_size(
struct se_device *dev,
struct block_device *bd,
struct request_queue *q)
{
unsigned long long blocks_long = (div_u64(i_size_read(bd->bd_inode),
bdev_logical_block_size(bd)) - 1);
u32 block_size = bdev_logical_block_size(bd);
if (block_size == DEV_ATTRIB(dev)->block_size)
return blocks_long;
switch (block_size) {
case 4096:
switch (DEV_ATTRIB(dev)->block_size) {
case 2048:
blocks_long <<= 1;
break;
case 1024:
blocks_long <<= 2;
break;
case 512:
blocks_long <<= 3;
default:
break;
}
break;
case 2048:
switch (DEV_ATTRIB(dev)->block_size) {
case 4096:
blocks_long >>= 1;
break;
case 1024:
blocks_long <<= 1;
break;
case 512:
blocks_long <<= 2;
break;
default:
break;
}
break;
case 1024:
switch (DEV_ATTRIB(dev)->block_size) {
case 4096:
blocks_long >>= 2;
break;
case 2048:
blocks_long >>= 1;
break;
case 512:
blocks_long <<= 1;
break;
default:
break;
}
break;
case 512:
switch (DEV_ATTRIB(dev)->block_size) {
case 4096:
blocks_long >>= 3;
break;
case 2048:
blocks_long >>= 2;
break;
case 1024:
blocks_long >>= 1;
break;
default:
break;
}
break;
default:
break;
}
return blocks_long;
}
/*
* Emulate SYCHRONIZE_CACHE_*
*/
static void iblock_emulate_sync_cache(struct se_task *task)
{
struct se_cmd *cmd = TASK_CMD(task);
struct iblock_dev *ib_dev = cmd->se_dev->dev_ptr;
int immed = (T_TASK(cmd)->t_task_cdb[1] & 0x2);
sector_t error_sector;
int ret;
/*
* If the Immediate bit is set, queue up the GOOD response
* for this SYNCHRONIZE_CACHE op
*/
if (immed)
transport_complete_sync_cache(cmd, 1);
/*
* blkdev_issue_flush() does not support a specifying a range, so
* we have to flush the entire cache.
*/
ret = blkdev_issue_flush(ib_dev->ibd_bd, GFP_KERNEL, &error_sector);
if (ret != 0) {
printk(KERN_ERR "IBLOCK: block_issue_flush() failed: %d "
" error_sector: %llu\n", ret,
(unsigned long long)error_sector);
}
if (!immed)
transport_complete_sync_cache(cmd, ret == 0);
}
/*
* Tell TCM Core that we are capable of WriteCache emulation for
* an underlying struct se_device.
*/
static int iblock_emulated_write_cache(struct se_device *dev)
{
return 1;
}
static int iblock_emulated_dpo(struct se_device *dev)
{
return 0;
}
/*
* Tell TCM Core that we will be emulating Forced Unit Access (FUA) for WRITEs
* for TYPE_DISK.
*/
static int iblock_emulated_fua_write(struct se_device *dev)
{
return 1;
}
static int iblock_emulated_fua_read(struct se_device *dev)
{
return 0;
}
static int iblock_do_task(struct se_task *task)
{
struct se_device *dev = task->task_se_cmd->se_dev;
struct iblock_req *req = IBLOCK_REQ(task);
struct iblock_dev *ibd = (struct iblock_dev *)req->ib_dev;
struct request_queue *q = bdev_get_queue(ibd->ibd_bd);
struct bio *bio = req->ib_bio, *nbio = NULL;
int rw;
if (task->task_data_direction == DMA_TO_DEVICE) {
/*
* Force data to disk if we pretend to not have a volatile
* write cache, or the initiator set the Force Unit Access bit.
*/
if (DEV_ATTRIB(dev)->emulate_write_cache == 0 ||
(DEV_ATTRIB(dev)->emulate_fua_write > 0 &&
T_TASK(task->task_se_cmd)->t_tasks_fua))
rw = WRITE_FUA;
else
rw = WRITE;
} else {
rw = READ;
}
while (bio) {
nbio = bio->bi_next;
bio->bi_next = NULL;
DEBUG_IBLOCK("Calling submit_bio() task: %p bio: %p"
" bio->bi_sector: %llu\n", task, bio, bio->bi_sector);
submit_bio(rw, bio);
bio = nbio;
}
if (q->unplug_fn)
q->unplug_fn(q);
return PYX_TRANSPORT_SENT_TO_TRANSPORT;
}
static int iblock_do_discard(struct se_device *dev, sector_t lba, u32 range)
{
struct iblock_dev *ibd = dev->dev_ptr;
struct block_device *bd = ibd->ibd_bd;
int barrier = 0;
return blkdev_issue_discard(bd, lba, range, GFP_KERNEL, barrier);
}
static void iblock_free_task(struct se_task *task)
{
struct iblock_req *req = IBLOCK_REQ(task);
struct bio *bio, *hbio = req->ib_bio;
/*
* We only release the bio(s) here if iblock_bio_done() has not called
* bio_put() -> iblock_bio_destructor().
*/
while (hbio != NULL) {
bio = hbio;
hbio = hbio->bi_next;
bio->bi_next = NULL;
bio_put(bio);
}
kfree(req);
}
enum {
Opt_udev_path, Opt_force, Opt_err
};
static match_table_t tokens = {
{Opt_udev_path, "udev_path=%s"},
{Opt_force, "force=%d"},
{Opt_err, NULL}
};
static ssize_t iblock_set_configfs_dev_params(struct se_hba *hba,
struct se_subsystem_dev *se_dev,
const char *page, ssize_t count)
{
struct iblock_dev *ib_dev = se_dev->se_dev_su_ptr;
char *orig, *ptr, *opts;
substring_t args[MAX_OPT_ARGS];
int ret = 0, arg, token;
opts = kstrdup(page, GFP_KERNEL);
if (!opts)
return -ENOMEM;
orig = opts;
while ((ptr = strsep(&opts, ",")) != NULL) {
if (!*ptr)
continue;
token = match_token(ptr, tokens, args);
switch (token) {
case Opt_udev_path:
if (ib_dev->ibd_bd) {
printk(KERN_ERR "Unable to set udev_path= while"
" ib_dev->ibd_bd exists\n");
ret = -EEXIST;
goto out;
}
ret = snprintf(ib_dev->ibd_udev_path, SE_UDEV_PATH_LEN,
"%s", match_strdup(&args[0]));
printk(KERN_INFO "IBLOCK: Referencing UDEV path: %s\n",
ib_dev->ibd_udev_path);
ib_dev->ibd_flags |= IBDF_HAS_UDEV_PATH;
break;
case Opt_force:
match_int(args, &arg);
ib_dev->ibd_force = arg;
printk(KERN_INFO "IBLOCK: Set force=%d\n",
ib_dev->ibd_force);
break;
default:
break;
}
}
out:
kfree(orig);
return (!ret) ? count : ret;
}
static ssize_t iblock_check_configfs_dev_params(
struct se_hba *hba,
struct se_subsystem_dev *se_dev)
{
struct iblock_dev *ibd = se_dev->se_dev_su_ptr;
if (!(ibd->ibd_flags & IBDF_HAS_UDEV_PATH)) {
printk(KERN_ERR "Missing udev_path= parameters for IBLOCK\n");
return -1;
}
return 0;
}
static ssize_t iblock_show_configfs_dev_params(
struct se_hba *hba,
struct se_subsystem_dev *se_dev,
char *b)
{
struct iblock_dev *ibd = se_dev->se_dev_su_ptr;
struct block_device *bd = ibd->ibd_bd;
char buf[BDEVNAME_SIZE];
ssize_t bl = 0;
if (bd)
bl += sprintf(b + bl, "iBlock device: %s",
bdevname(bd, buf));
if (ibd->ibd_flags & IBDF_HAS_UDEV_PATH) {
bl += sprintf(b + bl, " UDEV PATH: %s\n",
ibd->ibd_udev_path);
} else
bl += sprintf(b + bl, "\n");
bl += sprintf(b + bl, " ");
if (bd) {
bl += sprintf(b + bl, "Major: %d Minor: %d %s\n",
ibd->ibd_major, ibd->ibd_minor, (!bd->bd_contains) ?
"" : (bd->bd_holder == (struct iblock_dev *)ibd) ?
"CLAIMED: IBLOCK" : "CLAIMED: OS");
} else {
bl += sprintf(b + bl, "Major: %d Minor: %d\n",
ibd->ibd_major, ibd->ibd_minor);
}
return bl;
}
static void iblock_bio_destructor(struct bio *bio)
{
struct se_task *task = bio->bi_private;
struct iblock_dev *ib_dev = task->se_dev->dev_ptr;
bio_free(bio, ib_dev->ibd_bio_set);
}
static struct bio *iblock_get_bio(
struct se_task *task,
struct iblock_req *ib_req,
struct iblock_dev *ib_dev,
int *ret,
sector_t lba,
u32 sg_num)
{
struct bio *bio;
bio = bio_alloc_bioset(GFP_NOIO, sg_num, ib_dev->ibd_bio_set);
if (!(bio)) {
printk(KERN_ERR "Unable to allocate memory for bio\n");
*ret = PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES;
return NULL;
}
DEBUG_IBLOCK("Allocated bio: %p task_sg_num: %u using ibd_bio_set:"
" %p\n", bio, task->task_sg_num, ib_dev->ibd_bio_set);
DEBUG_IBLOCK("Allocated bio: %p task_size: %u\n", bio, task->task_size);
bio->bi_bdev = ib_dev->ibd_bd;
bio->bi_private = (void *) task;
bio->bi_destructor = iblock_bio_destructor;
bio->bi_end_io = &iblock_bio_done;
bio->bi_sector = lba;
atomic_inc(&ib_req->ib_bio_cnt);
DEBUG_IBLOCK("Set bio->bi_sector: %llu\n", bio->bi_sector);
DEBUG_IBLOCK("Set ib_req->ib_bio_cnt: %d\n",
atomic_read(&ib_req->ib_bio_cnt));
return bio;
}
static int iblock_map_task_SG(struct se_task *task)
{
struct se_cmd *cmd = task->task_se_cmd;
struct se_device *dev = SE_DEV(cmd);
struct iblock_dev *ib_dev = task->se_dev->dev_ptr;
struct iblock_req *ib_req = IBLOCK_REQ(task);
struct bio *bio = NULL, *hbio = NULL, *tbio = NULL;
struct scatterlist *sg;
int ret = 0;
u32 i, sg_num = task->task_sg_num;
sector_t block_lba;
/*
* Do starting conversion up from non 512-byte blocksize with
* struct se_task SCSI blocksize into Linux/Block 512 units for BIO.
*/
if (DEV_ATTRIB(dev)->block_size == 4096)
block_lba = (task->task_lba << 3);
else if (DEV_ATTRIB(dev)->block_size == 2048)
block_lba = (task->task_lba << 2);
else if (DEV_ATTRIB(dev)->block_size == 1024)
block_lba = (task->task_lba << 1);
else if (DEV_ATTRIB(dev)->block_size == 512)
block_lba = task->task_lba;
else {
printk(KERN_ERR "Unsupported SCSI -> BLOCK LBA conversion:"
" %u\n", DEV_ATTRIB(dev)->block_size);
return PYX_TRANSPORT_LU_COMM_FAILURE;
}
bio = iblock_get_bio(task, ib_req, ib_dev, &ret, block_lba, sg_num);
if (!(bio))
return ret;
ib_req->ib_bio = bio;
hbio = tbio = bio;
/*
* Use fs/bio.c:bio_add_pages() to setup the bio_vec maplist
* from TCM struct se_mem -> task->task_sg -> struct scatterlist memory.
*/
for_each_sg(task->task_sg, sg, task->task_sg_num, i) {
DEBUG_IBLOCK("task: %p bio: %p Calling bio_add_page(): page:"
" %p len: %u offset: %u\n", task, bio, sg_page(sg),
sg->length, sg->offset);
again:
ret = bio_add_page(bio, sg_page(sg), sg->length, sg->offset);
if (ret != sg->length) {
DEBUG_IBLOCK("*** Set bio->bi_sector: %llu\n",
bio->bi_sector);
DEBUG_IBLOCK("** task->task_size: %u\n",
task->task_size);
DEBUG_IBLOCK("*** bio->bi_max_vecs: %u\n",
bio->bi_max_vecs);
DEBUG_IBLOCK("*** bio->bi_vcnt: %u\n",
bio->bi_vcnt);
bio = iblock_get_bio(task, ib_req, ib_dev, &ret,
block_lba, sg_num);
if (!(bio))
goto fail;
tbio = tbio->bi_next = bio;
DEBUG_IBLOCK("-----------------> Added +1 bio: %p to"
" list, Going to again\n", bio);
goto again;
}
/* Always in 512 byte units for Linux/Block */
block_lba += sg->length >> IBLOCK_LBA_SHIFT;
sg_num--;
DEBUG_IBLOCK("task: %p bio-add_page() passed!, decremented"
" sg_num to %u\n", task, sg_num);
DEBUG_IBLOCK("task: %p bio_add_page() passed!, increased lba"
" to %llu\n", task, block_lba);
DEBUG_IBLOCK("task: %p bio_add_page() passed!, bio->bi_vcnt:"
" %u\n", task, bio->bi_vcnt);
}
return 0;
fail:
while (hbio) {
bio = hbio;
hbio = hbio->bi_next;
bio->bi_next = NULL;
bio_put(bio);
}
return ret;
}
static unsigned char *iblock_get_cdb(struct se_task *task)
{
return IBLOCK_REQ(task)->ib_scsi_cdb;
}
static u32 iblock_get_device_rev(struct se_device *dev)
{
return SCSI_SPC_2; /* Returns SPC-3 in Initiator Data */
}
static u32 iblock_get_device_type(struct se_device *dev)
{
return TYPE_DISK;
}
static sector_t iblock_get_blocks(struct se_device *dev)
{
struct iblock_dev *ibd = dev->dev_ptr;
struct block_device *bd = ibd->ibd_bd;
struct request_queue *q = bdev_get_queue(bd);
return iblock_emulate_read_cap_with_block_size(dev, bd, q);
}
static void iblock_bio_done(struct bio *bio, int err)
{
struct se_task *task = bio->bi_private;
struct iblock_req *ibr = IBLOCK_REQ(task);
/*
* Set -EIO if !BIO_UPTODATE and the passed is still err=0
*/
if (!(test_bit(BIO_UPTODATE, &bio->bi_flags)) && !(err))
err = -EIO;
if (err != 0) {
printk(KERN_ERR "test_bit(BIO_UPTODATE) failed for bio: %p,"
" err: %d\n", bio, err);
/*
* Bump the ib_bio_err_cnt and release bio.
*/
atomic_inc(&ibr->ib_bio_err_cnt);
smp_mb__after_atomic_inc();
bio_put(bio);
/*
* Wait to complete the task until the last bio as completed.
*/
if (!(atomic_dec_and_test(&ibr->ib_bio_cnt)))
return;
ibr->ib_bio = NULL;
transport_complete_task(task, 0);
return;
}
DEBUG_IBLOCK("done[%p] bio: %p task_lba: %llu bio_lba: %llu err=%d\n",
task, bio, task->task_lba, bio->bi_sector, err);
/*
* bio_put() will call iblock_bio_destructor() to release the bio back
* to ibr->ib_bio_set.
*/
bio_put(bio);
/*
* Wait to complete the task until the last bio as completed.
*/
if (!(atomic_dec_and_test(&ibr->ib_bio_cnt)))
return;
/*
* Return GOOD status for task if zero ib_bio_err_cnt exists.
*/
ibr->ib_bio = NULL;
transport_complete_task(task, (!atomic_read(&ibr->ib_bio_err_cnt)));
}
static struct se_subsystem_api iblock_template = {
.name = "iblock",
.owner = THIS_MODULE,
.transport_type = TRANSPORT_PLUGIN_VHBA_PDEV,
.map_task_SG = iblock_map_task_SG,
.attach_hba = iblock_attach_hba,
.detach_hba = iblock_detach_hba,
.allocate_virtdevice = iblock_allocate_virtdevice,
.create_virtdevice = iblock_create_virtdevice,
.free_device = iblock_free_device,
.dpo_emulated = iblock_emulated_dpo,
.fua_write_emulated = iblock_emulated_fua_write,
.fua_read_emulated = iblock_emulated_fua_read,
.write_cache_emulated = iblock_emulated_write_cache,
.alloc_task = iblock_alloc_task,
.do_task = iblock_do_task,
.do_discard = iblock_do_discard,
.do_sync_cache = iblock_emulate_sync_cache,
.free_task = iblock_free_task,
.check_configfs_dev_params = iblock_check_configfs_dev_params,
.set_configfs_dev_params = iblock_set_configfs_dev_params,
.show_configfs_dev_params = iblock_show_configfs_dev_params,
.get_cdb = iblock_get_cdb,
.get_device_rev = iblock_get_device_rev,
.get_device_type = iblock_get_device_type,
.get_blocks = iblock_get_blocks,
};
static int __init iblock_module_init(void)
{
return transport_subsystem_register(&iblock_template);
}
static void iblock_module_exit(void)
{
transport_subsystem_release(&iblock_template);
}
MODULE_DESCRIPTION("TCM IBLOCK subsystem plugin");
MODULE_AUTHOR("nab@Linux-iSCSI.org");
MODULE_LICENSE("GPL");
module_init(iblock_module_init);
module_exit(iblock_module_exit);

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#ifndef TARGET_CORE_IBLOCK_H
#define TARGET_CORE_IBLOCK_H
#define IBLOCK_VERSION "4.0"
#define IBLOCK_HBA_QUEUE_DEPTH 512
#define IBLOCK_DEVICE_QUEUE_DEPTH 32
#define IBLOCK_MAX_DEVICE_QUEUE_DEPTH 128
#define IBLOCK_MAX_CDBS 16
#define IBLOCK_LBA_SHIFT 9
struct iblock_req {
struct se_task ib_task;
unsigned char ib_scsi_cdb[TCM_MAX_COMMAND_SIZE];
atomic_t ib_bio_cnt;
atomic_t ib_bio_err_cnt;
struct bio *ib_bio;
struct iblock_dev *ib_dev;
} ____cacheline_aligned;
#define IBDF_HAS_UDEV_PATH 0x01
#define IBDF_HAS_FORCE 0x02
struct iblock_dev {
unsigned char ibd_udev_path[SE_UDEV_PATH_LEN];
int ibd_force;
int ibd_major;
int ibd_minor;
u32 ibd_depth;
u32 ibd_flags;
struct bio_set *ibd_bio_set;
struct block_device *ibd_bd;
struct iblock_hba *ibd_host;
} ____cacheline_aligned;
struct iblock_hba {
int iblock_host_id;
} ____cacheline_aligned;
#endif /* TARGET_CORE_IBLOCK_H */

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#ifndef TARGET_CORE_MIB_H
#define TARGET_CORE_MIB_H
typedef enum {
SCSI_INST_INDEX,
SCSI_DEVICE_INDEX,
SCSI_AUTH_INTR_INDEX,
SCSI_INDEX_TYPE_MAX
} scsi_index_t;
struct scsi_index_table {
spinlock_t lock;
u32 scsi_mib_index[SCSI_INDEX_TYPE_MAX];
} ____cacheline_aligned;
/* SCSI Port stats */
struct scsi_port_stats {
u64 cmd_pdus;
u64 tx_data_octets;
u64 rx_data_octets;
} ____cacheline_aligned;
extern int init_scsi_target_mib(void);
extern void remove_scsi_target_mib(void);
extern void init_scsi_index_table(void);
extern u32 scsi_get_new_index(scsi_index_t);
#endif /*** TARGET_CORE_MIB_H ***/

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#ifndef TARGET_CORE_PR_H
#define TARGET_CORE_PR_H
/*
* PERSISTENT_RESERVE_OUT service action codes
*
* spc4r17 section 6.14.2 Table 171
*/
#define PRO_REGISTER 0x00
#define PRO_RESERVE 0x01
#define PRO_RELEASE 0x02
#define PRO_CLEAR 0x03
#define PRO_PREEMPT 0x04
#define PRO_PREEMPT_AND_ABORT 0x05
#define PRO_REGISTER_AND_IGNORE_EXISTING_KEY 0x06
#define PRO_REGISTER_AND_MOVE 0x07
/*
* PERSISTENT_RESERVE_IN service action codes
*
* spc4r17 section 6.13.1 Table 159
*/
#define PRI_READ_KEYS 0x00
#define PRI_READ_RESERVATION 0x01
#define PRI_REPORT_CAPABILITIES 0x02
#define PRI_READ_FULL_STATUS 0x03
/*
* PERSISTENT_RESERVE_ SCOPE field
*
* spc4r17 section 6.13.3.3 Table 163
*/
#define PR_SCOPE_LU_SCOPE 0x00
/*
* PERSISTENT_RESERVE_* TYPE field
*
* spc4r17 section 6.13.3.4 Table 164
*/
#define PR_TYPE_WRITE_EXCLUSIVE 0x01
#define PR_TYPE_EXCLUSIVE_ACCESS 0x03
#define PR_TYPE_WRITE_EXCLUSIVE_REGONLY 0x05
#define PR_TYPE_EXCLUSIVE_ACCESS_REGONLY 0x06
#define PR_TYPE_WRITE_EXCLUSIVE_ALLREG 0x07
#define PR_TYPE_EXCLUSIVE_ACCESS_ALLREG 0x08
#define PR_APTPL_MAX_IPORT_LEN 256
#define PR_APTPL_MAX_TPORT_LEN 256
extern struct kmem_cache *t10_pr_reg_cache;
extern int core_pr_dump_initiator_port(struct t10_pr_registration *,
char *, u32);
extern int core_scsi2_emulate_crh(struct se_cmd *);
extern int core_scsi3_alloc_aptpl_registration(
struct t10_reservation_template *, u64,
unsigned char *, unsigned char *, u32,
unsigned char *, u16, u32, int, int, u8);
extern int core_scsi3_check_aptpl_registration(struct se_device *,
struct se_portal_group *, struct se_lun *,
struct se_lun_acl *);
extern void core_scsi3_free_pr_reg_from_nacl(struct se_device *,
struct se_node_acl *);
extern void core_scsi3_free_all_registrations(struct se_device *);
extern unsigned char *core_scsi3_pr_dump_type(int);
extern int core_scsi3_check_cdb_abort_and_preempt(struct list_head *,
struct se_cmd *);
extern int core_scsi3_emulate_pr(struct se_cmd *);
extern int core_setup_reservations(struct se_device *, int);
#endif /* TARGET_CORE_PR_H */

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#ifndef TARGET_CORE_PSCSI_H
#define TARGET_CORE_PSCSI_H
#define PSCSI_VERSION "v4.0"
#define PSCSI_VIRTUAL_HBA_DEPTH 2048
/* used in pscsi_find_alloc_len() */
#ifndef INQUIRY_DATA_SIZE
#define INQUIRY_DATA_SIZE 0x24
#endif
/* used in pscsi_add_device_to_list() */
#define PSCSI_DEFAULT_QUEUEDEPTH 1
#define PS_RETRY 5
#define PS_TIMEOUT_DISK (15*HZ)
#define PS_TIMEOUT_OTHER (500*HZ)
#include <linux/device.h>
#include <scsi/scsi_driver.h>
#include <scsi/scsi_device.h>
#include <linux/kref.h>
#include <linux/kobject.h>
struct pscsi_plugin_task {
struct se_task pscsi_task;
unsigned char *pscsi_cdb;
unsigned char __pscsi_cdb[TCM_MAX_COMMAND_SIZE];
unsigned char pscsi_sense[SCSI_SENSE_BUFFERSIZE];
int pscsi_direction;
int pscsi_result;
u32 pscsi_resid;
struct request *pscsi_req;
} ____cacheline_aligned;
#define PDF_HAS_CHANNEL_ID 0x01
#define PDF_HAS_TARGET_ID 0x02
#define PDF_HAS_LUN_ID 0x04
#define PDF_HAS_VPD_UNIT_SERIAL 0x08
#define PDF_HAS_VPD_DEV_IDENT 0x10
#define PDF_HAS_VIRT_HOST_ID 0x20
struct pscsi_dev_virt {
int pdv_flags;
int pdv_host_id;
int pdv_channel_id;
int pdv_target_id;
int pdv_lun_id;
struct block_device *pdv_bd;
struct scsi_device *pdv_sd;
struct se_hba *pdv_se_hba;
} ____cacheline_aligned;
typedef enum phv_modes {
PHV_VIRUTAL_HOST_ID,
PHV_LLD_SCSI_HOST_NO
} phv_modes_t;
struct pscsi_hba_virt {
int phv_host_id;
phv_modes_t phv_mode;
struct Scsi_Host *phv_lld_host;
} ____cacheline_aligned;
#endif /*** TARGET_CORE_PSCSI_H ***/

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#ifndef TARGET_CORE_RD_H
#define TARGET_CORE_RD_H
#define RD_HBA_VERSION "v4.0"
#define RD_DR_VERSION "4.0"
#define RD_MCP_VERSION "4.0"
/* Largest piece of memory kmalloc can allocate */
#define RD_MAX_ALLOCATION_SIZE 65536
/* Maximum queuedepth for the Ramdisk HBA */
#define RD_HBA_QUEUE_DEPTH 256
#define RD_DEVICE_QUEUE_DEPTH 32
#define RD_MAX_DEVICE_QUEUE_DEPTH 128
#define RD_BLOCKSIZE 512
#define RD_MAX_SECTORS 1024
extern struct kmem_cache *se_mem_cache;
/* Used in target_core_init_configfs() for virtual LUN 0 access */
int __init rd_module_init(void);
void rd_module_exit(void);
#define RRF_EMULATE_CDB 0x01
#define RRF_GOT_LBA 0x02
struct rd_request {
struct se_task rd_task;
/* SCSI CDB from iSCSI Command PDU */
unsigned char rd_scsi_cdb[TCM_MAX_COMMAND_SIZE];
/* Offset from start of page */
u32 rd_offset;
/* Starting page in Ramdisk for request */
u32 rd_page;
/* Total number of pages needed for request */
u32 rd_page_count;
/* Scatterlist count */
u32 rd_size;
/* Ramdisk device */
struct rd_dev *rd_dev;
} ____cacheline_aligned;
struct rd_dev_sg_table {
u32 page_start_offset;
u32 page_end_offset;
u32 rd_sg_count;
struct scatterlist *sg_table;
} ____cacheline_aligned;
#define RDF_HAS_PAGE_COUNT 0x01
struct rd_dev {
int rd_direct;
u32 rd_flags;
/* Unique Ramdisk Device ID in Ramdisk HBA */
u32 rd_dev_id;
/* Total page count for ramdisk device */
u32 rd_page_count;
/* Number of SG tables in sg_table_array */
u32 sg_table_count;
u32 rd_queue_depth;
/* Array of rd_dev_sg_table_t containing scatterlists */
struct rd_dev_sg_table *sg_table_array;
/* Ramdisk HBA device is connected to */
struct rd_host *rd_host;
} ____cacheline_aligned;
struct rd_host {
u32 rd_host_dev_id_count;
u32 rd_host_id; /* Unique Ramdisk Host ID */
} ____cacheline_aligned;
#endif /* TARGET_CORE_RD_H */

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/*******************************************************************************
* Filename: target_core_scdb.c
*
* This file contains the generic target engine Split CDB related functions.
*
* Copyright (c) 2004-2005 PyX Technologies, Inc.
* Copyright (c) 2005, 2006, 2007 SBE, Inc.
* Copyright (c) 2007-2010 Rising Tide Systems
* Copyright (c) 2008-2010 Linux-iSCSI.org
*
* Nicholas A. Bellinger <nab@kernel.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
******************************************************************************/
#include <linux/net.h>
#include <linux/string.h>
#include <scsi/scsi.h>
#include <asm/unaligned.h>
#include <target/target_core_base.h>
#include <target/target_core_transport.h>
#include "target_core_scdb.h"
/* split_cdb_XX_6():
*
* 21-bit LBA w/ 8-bit SECTORS
*/
void split_cdb_XX_6(
unsigned long long lba,
u32 *sectors,
unsigned char *cdb)
{
cdb[1] = (lba >> 16) & 0x1f;
cdb[2] = (lba >> 8) & 0xff;
cdb[3] = lba & 0xff;
cdb[4] = *sectors & 0xff;
}
/* split_cdb_XX_10():
*
* 32-bit LBA w/ 16-bit SECTORS
*/
void split_cdb_XX_10(
unsigned long long lba,
u32 *sectors,
unsigned char *cdb)
{
put_unaligned_be32(lba, &cdb[2]);
put_unaligned_be16(*sectors, &cdb[7]);
}
/* split_cdb_XX_12():
*
* 32-bit LBA w/ 32-bit SECTORS
*/
void split_cdb_XX_12(
unsigned long long lba,
u32 *sectors,
unsigned char *cdb)
{
put_unaligned_be32(lba, &cdb[2]);
put_unaligned_be32(*sectors, &cdb[6]);
}
/* split_cdb_XX_16():
*
* 64-bit LBA w/ 32-bit SECTORS
*/
void split_cdb_XX_16(
unsigned long long lba,
u32 *sectors,
unsigned char *cdb)
{
put_unaligned_be64(lba, &cdb[2]);
put_unaligned_be32(*sectors, &cdb[10]);
}
/*
* split_cdb_XX_32():
*
* 64-bit LBA w/ 32-bit SECTORS such as READ_32, WRITE_32 and emulated XDWRITEREAD_32
*/
void split_cdb_XX_32(
unsigned long long lba,
u32 *sectors,
unsigned char *cdb)
{
put_unaligned_be64(lba, &cdb[12]);
put_unaligned_be32(*sectors, &cdb[28]);
}

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#ifndef TARGET_CORE_SCDB_H
#define TARGET_CORE_SCDB_H
extern void split_cdb_XX_6(unsigned long long, u32 *, unsigned char *);
extern void split_cdb_XX_10(unsigned long long, u32 *, unsigned char *);
extern void split_cdb_XX_12(unsigned long long, u32 *, unsigned char *);
extern void split_cdb_XX_16(unsigned long long, u32 *, unsigned char *);
extern void split_cdb_XX_32(unsigned long long, u32 *, unsigned char *);
#endif /* TARGET_CORE_SCDB_H */

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/*******************************************************************************
* Filename: target_core_tmr.c
*
* This file contains SPC-3 task management infrastructure
*
* Copyright (c) 2009,2010 Rising Tide Systems
* Copyright (c) 2009,2010 Linux-iSCSI.org
*
* Nicholas A. Bellinger <nab@kernel.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
******************************************************************************/
#include <linux/version.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/list.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <target/target_core_base.h>
#include <target/target_core_device.h>
#include <target/target_core_tmr.h>
#include <target/target_core_transport.h>
#include <target/target_core_fabric_ops.h>
#include <target/target_core_configfs.h>
#include "target_core_alua.h"
#include "target_core_pr.h"
#define DEBUG_LUN_RESET
#ifdef DEBUG_LUN_RESET
#define DEBUG_LR(x...) printk(KERN_INFO x)
#else
#define DEBUG_LR(x...)
#endif
struct se_tmr_req *core_tmr_alloc_req(
struct se_cmd *se_cmd,
void *fabric_tmr_ptr,
u8 function)
{
struct se_tmr_req *tmr;
tmr = kmem_cache_zalloc(se_tmr_req_cache, GFP_KERNEL);
if (!(tmr)) {
printk(KERN_ERR "Unable to allocate struct se_tmr_req\n");
return ERR_PTR(-ENOMEM);
}
tmr->task_cmd = se_cmd;
tmr->fabric_tmr_ptr = fabric_tmr_ptr;
tmr->function = function;
INIT_LIST_HEAD(&tmr->tmr_list);
return tmr;
}
EXPORT_SYMBOL(core_tmr_alloc_req);
void core_tmr_release_req(
struct se_tmr_req *tmr)
{
struct se_device *dev = tmr->tmr_dev;
spin_lock(&dev->se_tmr_lock);
list_del(&tmr->tmr_list);
kmem_cache_free(se_tmr_req_cache, tmr);
spin_unlock(&dev->se_tmr_lock);
}
static void core_tmr_handle_tas_abort(
struct se_node_acl *tmr_nacl,
struct se_cmd *cmd,
int tas,
int fe_count)
{
if (!(fe_count)) {
transport_cmd_finish_abort(cmd, 1);
return;
}
/*
* TASK ABORTED status (TAS) bit support
*/
if (((tmr_nacl != NULL) &&
(tmr_nacl == cmd->se_sess->se_node_acl)) || tas)
transport_send_task_abort(cmd);
transport_cmd_finish_abort(cmd, 0);
}
int core_tmr_lun_reset(
struct se_device *dev,
struct se_tmr_req *tmr,
struct list_head *preempt_and_abort_list,
struct se_cmd *prout_cmd)
{
struct se_cmd *cmd;
struct se_queue_req *qr, *qr_tmp;
struct se_node_acl *tmr_nacl = NULL;
struct se_portal_group *tmr_tpg = NULL;
struct se_queue_obj *qobj = dev->dev_queue_obj;
struct se_tmr_req *tmr_p, *tmr_pp;
struct se_task *task, *task_tmp;
unsigned long flags;
int fe_count, state, tas;
/*
* TASK_ABORTED status bit, this is configurable via ConfigFS
* struct se_device attributes. spc4r17 section 7.4.6 Control mode page
*
* A task aborted status (TAS) bit set to zero specifies that aborted
* tasks shall be terminated by the device server without any response
* to the application client. A TAS bit set to one specifies that tasks
* aborted by the actions of an I_T nexus other than the I_T nexus on
* which the command was received shall be completed with TASK ABORTED
* status (see SAM-4).
*/
tas = DEV_ATTRIB(dev)->emulate_tas;
/*
* Determine if this se_tmr is coming from a $FABRIC_MOD
* or struct se_device passthrough..
*/
if (tmr && tmr->task_cmd && tmr->task_cmd->se_sess) {
tmr_nacl = tmr->task_cmd->se_sess->se_node_acl;
tmr_tpg = tmr->task_cmd->se_sess->se_tpg;
if (tmr_nacl && tmr_tpg) {
DEBUG_LR("LUN_RESET: TMR caller fabric: %s"
" initiator port %s\n",
TPG_TFO(tmr_tpg)->get_fabric_name(),
tmr_nacl->initiatorname);
}
}
DEBUG_LR("LUN_RESET: %s starting for [%s], tas: %d\n",
(preempt_and_abort_list) ? "Preempt" : "TMR",
TRANSPORT(dev)->name, tas);
/*
* Release all pending and outgoing TMRs aside from the received
* LUN_RESET tmr..
*/
spin_lock(&dev->se_tmr_lock);
list_for_each_entry_safe(tmr_p, tmr_pp, &dev->dev_tmr_list, tmr_list) {
/*
* Allow the received TMR to return with FUNCTION_COMPLETE.
*/
if (tmr && (tmr_p == tmr))
continue;
cmd = tmr_p->task_cmd;
if (!(cmd)) {
printk(KERN_ERR "Unable to locate struct se_cmd for TMR\n");
continue;
}
/*
* If this function was called with a valid pr_res_key
* parameter (eg: for PROUT PREEMPT_AND_ABORT service action
* skip non regisration key matching TMRs.
*/
if ((preempt_and_abort_list != NULL) &&
(core_scsi3_check_cdb_abort_and_preempt(
preempt_and_abort_list, cmd) != 0))
continue;
spin_unlock(&dev->se_tmr_lock);
spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
if (!(atomic_read(&T_TASK(cmd)->t_transport_active))) {
spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
spin_lock(&dev->se_tmr_lock);
continue;
}
if (cmd->t_state == TRANSPORT_ISTATE_PROCESSING) {
spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
spin_lock(&dev->se_tmr_lock);
continue;
}
DEBUG_LR("LUN_RESET: %s releasing TMR %p Function: 0x%02x,"
" Response: 0x%02x, t_state: %d\n",
(preempt_and_abort_list) ? "Preempt" : "", tmr_p,
tmr_p->function, tmr_p->response, cmd->t_state);
spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
transport_cmd_finish_abort_tmr(cmd);
spin_lock(&dev->se_tmr_lock);
}
spin_unlock(&dev->se_tmr_lock);
/*
* Complete outstanding struct se_task CDBs with TASK_ABORTED SAM status.
* This is following sam4r17, section 5.6 Aborting commands, Table 38
* for TMR LUN_RESET:
*
* a) "Yes" indicates that each command that is aborted on an I_T nexus
* other than the one that caused the SCSI device condition is
* completed with TASK ABORTED status, if the TAS bit is set to one in
* the Control mode page (see SPC-4). "No" indicates that no status is
* returned for aborted commands.
*
* d) If the logical unit reset is caused by a particular I_T nexus
* (e.g., by a LOGICAL UNIT RESET task management function), then "yes"
* (TASK_ABORTED status) applies.
*
* Otherwise (e.g., if triggered by a hard reset), "no"
* (no TASK_ABORTED SAM status) applies.
*
* Note that this seems to be independent of TAS (Task Aborted Status)
* in the Control Mode Page.
*/
spin_lock_irqsave(&dev->execute_task_lock, flags);
list_for_each_entry_safe(task, task_tmp, &dev->state_task_list,
t_state_list) {
if (!(TASK_CMD(task))) {
printk(KERN_ERR "TASK_CMD(task) is NULL!\n");
continue;
}
cmd = TASK_CMD(task);
if (!T_TASK(cmd)) {
printk(KERN_ERR "T_TASK(cmd) is NULL for task: %p cmd:"
" %p ITT: 0x%08x\n", task, cmd,
CMD_TFO(cmd)->get_task_tag(cmd));
continue;
}
/*
* For PREEMPT_AND_ABORT usage, only process commands
* with a matching reservation key.
*/
if ((preempt_and_abort_list != NULL) &&
(core_scsi3_check_cdb_abort_and_preempt(
preempt_and_abort_list, cmd) != 0))
continue;
/*
* Not aborting PROUT PREEMPT_AND_ABORT CDB..
*/
if (prout_cmd == cmd)
continue;
list_del(&task->t_state_list);
atomic_set(&task->task_state_active, 0);
spin_unlock_irqrestore(&dev->execute_task_lock, flags);
spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
DEBUG_LR("LUN_RESET: %s cmd: %p task: %p"
" ITT/CmdSN: 0x%08x/0x%08x, i_state: %d, t_state/"
"def_t_state: %d/%d cdb: 0x%02x\n",
(preempt_and_abort_list) ? "Preempt" : "", cmd, task,
CMD_TFO(cmd)->get_task_tag(cmd), 0,
CMD_TFO(cmd)->get_cmd_state(cmd), cmd->t_state,
cmd->deferred_t_state, T_TASK(cmd)->t_task_cdb[0]);
DEBUG_LR("LUN_RESET: ITT[0x%08x] - pr_res_key: 0x%016Lx"
" t_task_cdbs: %d t_task_cdbs_left: %d"
" t_task_cdbs_sent: %d -- t_transport_active: %d"
" t_transport_stop: %d t_transport_sent: %d\n",
CMD_TFO(cmd)->get_task_tag(cmd), cmd->pr_res_key,
T_TASK(cmd)->t_task_cdbs,
atomic_read(&T_TASK(cmd)->t_task_cdbs_left),
atomic_read(&T_TASK(cmd)->t_task_cdbs_sent),
atomic_read(&T_TASK(cmd)->t_transport_active),
atomic_read(&T_TASK(cmd)->t_transport_stop),
atomic_read(&T_TASK(cmd)->t_transport_sent));
if (atomic_read(&task->task_active)) {
atomic_set(&task->task_stop, 1);
spin_unlock_irqrestore(
&T_TASK(cmd)->t_state_lock, flags);
DEBUG_LR("LUN_RESET: Waiting for task: %p to shutdown"
" for dev: %p\n", task, dev);
wait_for_completion(&task->task_stop_comp);
DEBUG_LR("LUN_RESET Completed task: %p shutdown for"
" dev: %p\n", task, dev);
spin_lock_irqsave(&T_TASK(cmd)->t_state_lock, flags);
atomic_dec(&T_TASK(cmd)->t_task_cdbs_left);
atomic_set(&task->task_active, 0);
atomic_set(&task->task_stop, 0);
}
__transport_stop_task_timer(task, &flags);
if (!(atomic_dec_and_test(&T_TASK(cmd)->t_task_cdbs_ex_left))) {
spin_unlock_irqrestore(
&T_TASK(cmd)->t_state_lock, flags);
DEBUG_LR("LUN_RESET: Skipping task: %p, dev: %p for"
" t_task_cdbs_ex_left: %d\n", task, dev,
atomic_read(&T_TASK(cmd)->t_task_cdbs_ex_left));
spin_lock_irqsave(&dev->execute_task_lock, flags);
continue;
}
fe_count = atomic_read(&T_TASK(cmd)->t_fe_count);
if (atomic_read(&T_TASK(cmd)->t_transport_active)) {
DEBUG_LR("LUN_RESET: got t_transport_active = 1 for"
" task: %p, t_fe_count: %d dev: %p\n", task,
fe_count, dev);
spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock,
flags);
core_tmr_handle_tas_abort(tmr_nacl, cmd, tas, fe_count);
spin_lock_irqsave(&dev->execute_task_lock, flags);
continue;
}
DEBUG_LR("LUN_RESET: Got t_transport_active = 0 for task: %p,"
" t_fe_count: %d dev: %p\n", task, fe_count, dev);
spin_unlock_irqrestore(&T_TASK(cmd)->t_state_lock, flags);
core_tmr_handle_tas_abort(tmr_nacl, cmd, tas, fe_count);
spin_lock_irqsave(&dev->execute_task_lock, flags);
}
spin_unlock_irqrestore(&dev->execute_task_lock, flags);
/*
* Release all commands remaining in the struct se_device cmd queue.
*
* This follows the same logic as above for the struct se_device
* struct se_task state list, where commands are returned with
* TASK_ABORTED status, if there is an outstanding $FABRIC_MOD
* reference, otherwise the struct se_cmd is released.
*/
spin_lock_irqsave(&qobj->cmd_queue_lock, flags);
list_for_each_entry_safe(qr, qr_tmp, &qobj->qobj_list, qr_list) {
cmd = (struct se_cmd *)qr->cmd;
if (!(cmd)) {
/*
* Skip these for non PREEMPT_AND_ABORT usage..
*/
if (preempt_and_abort_list != NULL)
continue;
atomic_dec(&qobj->queue_cnt);
list_del(&qr->qr_list);
kfree(qr);
continue;
}
/*
* For PREEMPT_AND_ABORT usage, only process commands
* with a matching reservation key.
*/
if ((preempt_and_abort_list != NULL) &&
(core_scsi3_check_cdb_abort_and_preempt(
preempt_and_abort_list, cmd) != 0))
continue;
/*
* Not aborting PROUT PREEMPT_AND_ABORT CDB..
*/
if (prout_cmd == cmd)
continue;
atomic_dec(&T_TASK(cmd)->t_transport_queue_active);
atomic_dec(&qobj->queue_cnt);
list_del(&qr->qr_list);
spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags);
state = qr->state;
kfree(qr);
DEBUG_LR("LUN_RESET: %s from Device Queue: cmd: %p t_state:"
" %d t_fe_count: %d\n", (preempt_and_abort_list) ?
"Preempt" : "", cmd, state,
atomic_read(&T_TASK(cmd)->t_fe_count));
/*
* Signal that the command has failed via cmd->se_cmd_flags,
* and call TFO->new_cmd_failure() to wakeup any fabric
* dependent code used to wait for unsolicited data out
* allocation to complete. The fabric module is expected
* to dump any remaining unsolicited data out for the aborted
* command at this point.
*/
transport_new_cmd_failure(cmd);
core_tmr_handle_tas_abort(tmr_nacl, cmd, tas,
atomic_read(&T_TASK(cmd)->t_fe_count));
spin_lock_irqsave(&qobj->cmd_queue_lock, flags);
}
spin_unlock_irqrestore(&qobj->cmd_queue_lock, flags);
/*
* Clear any legacy SPC-2 reservation when called during
* LOGICAL UNIT RESET
*/
if (!(preempt_and_abort_list) &&
(dev->dev_flags & DF_SPC2_RESERVATIONS)) {
spin_lock(&dev->dev_reservation_lock);
dev->dev_reserved_node_acl = NULL;
dev->dev_flags &= ~DF_SPC2_RESERVATIONS;
spin_unlock(&dev->dev_reservation_lock);
printk(KERN_INFO "LUN_RESET: SCSI-2 Released reservation\n");
}
spin_lock(&dev->stats_lock);
dev->num_resets++;
spin_unlock(&dev->stats_lock);
DEBUG_LR("LUN_RESET: %s for [%s] Complete\n",
(preempt_and_abort_list) ? "Preempt" : "TMR",
TRANSPORT(dev)->name);
return 0;
}

826
drivers/target/target_core_tpg.c Normal file
View File

@ -0,0 +1,826 @@
/*******************************************************************************
* Filename: target_core_tpg.c
*
* This file contains generic Target Portal Group related functions.
*
* Copyright (c) 2002, 2003, 2004, 2005 PyX Technologies, Inc.
* Copyright (c) 2005, 2006, 2007 SBE, Inc.
* Copyright (c) 2007-2010 Rising Tide Systems
* Copyright (c) 2008-2010 Linux-iSCSI.org
*
* Nicholas A. Bellinger <nab@kernel.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
******************************************************************************/
#include <linux/net.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/smp_lock.h>
#include <linux/in.h>
#include <net/sock.h>
#include <net/tcp.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <target/target_core_base.h>
#include <target/target_core_device.h>
#include <target/target_core_tpg.h>
#include <target/target_core_transport.h>
#include <target/target_core_fabric_ops.h>
#include "target_core_hba.h"
/* core_clear_initiator_node_from_tpg():
*
*
*/
static void core_clear_initiator_node_from_tpg(
struct se_node_acl *nacl,
struct se_portal_group *tpg)
{
int i;
struct se_dev_entry *deve;
struct se_lun *lun;
struct se_lun_acl *acl, *acl_tmp;
spin_lock_irq(&nacl->device_list_lock);
for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
deve = &nacl->device_list[i];
if (!(deve->lun_flags & TRANSPORT_LUNFLAGS_INITIATOR_ACCESS))
continue;
if (!deve->se_lun) {
printk(KERN_ERR "%s device entries device pointer is"
" NULL, but Initiator has access.\n",
TPG_TFO(tpg)->get_fabric_name());
continue;
}
lun = deve->se_lun;
spin_unlock_irq(&nacl->device_list_lock);
core_update_device_list_for_node(lun, NULL, deve->mapped_lun,
TRANSPORT_LUNFLAGS_NO_ACCESS, nacl, tpg, 0);
spin_lock(&lun->lun_acl_lock);
list_for_each_entry_safe(acl, acl_tmp,
&lun->lun_acl_list, lacl_list) {
if (!(strcmp(acl->initiatorname,
nacl->initiatorname)) &&
(acl->mapped_lun == deve->mapped_lun))
break;
}
if (!acl) {
printk(KERN_ERR "Unable to locate struct se_lun_acl for %s,"
" mapped_lun: %u\n", nacl->initiatorname,
deve->mapped_lun);
spin_unlock(&lun->lun_acl_lock);
spin_lock_irq(&nacl->device_list_lock);
continue;
}
list_del(&acl->lacl_list);
spin_unlock(&lun->lun_acl_lock);
spin_lock_irq(&nacl->device_list_lock);
kfree(acl);
}
spin_unlock_irq(&nacl->device_list_lock);
}
/* __core_tpg_get_initiator_node_acl():
*
* spin_lock_bh(&tpg->acl_node_lock); must be held when calling
*/
struct se_node_acl *__core_tpg_get_initiator_node_acl(
struct se_portal_group *tpg,
const char *initiatorname)
{
struct se_node_acl *acl;
list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
if (!(strcmp(acl->initiatorname, initiatorname)))
return acl;
}
return NULL;
}
/* core_tpg_get_initiator_node_acl():
*
*
*/
struct se_node_acl *core_tpg_get_initiator_node_acl(
struct se_portal_group *tpg,
unsigned char *initiatorname)
{
struct se_node_acl *acl;
spin_lock_bh(&tpg->acl_node_lock);
list_for_each_entry(acl, &tpg->acl_node_list, acl_list) {
if (!(strcmp(acl->initiatorname, initiatorname)) &&
(!(acl->dynamic_node_acl))) {
spin_unlock_bh(&tpg->acl_node_lock);
return acl;
}
}
spin_unlock_bh(&tpg->acl_node_lock);
return NULL;
}
/* core_tpg_add_node_to_devs():
*
*
*/
void core_tpg_add_node_to_devs(
struct se_node_acl *acl,
struct se_portal_group *tpg)
{
int i = 0;
u32 lun_access = 0;
struct se_lun *lun;
struct se_device *dev;
spin_lock(&tpg->tpg_lun_lock);
for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
lun = &tpg->tpg_lun_list[i];
if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE)
continue;
spin_unlock(&tpg->tpg_lun_lock);
dev = lun->lun_se_dev;
/*
* By default in LIO-Target $FABRIC_MOD,
* demo_mode_write_protect is ON, or READ_ONLY;
*/
if (!(TPG_TFO(tpg)->tpg_check_demo_mode_write_protect(tpg))) {
if (dev->dev_flags & DF_READ_ONLY)
lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
else
lun_access = TRANSPORT_LUNFLAGS_READ_WRITE;
} else {
/*
* Allow only optical drives to issue R/W in default RO
* demo mode.
*/
if (TRANSPORT(dev)->get_device_type(dev) == TYPE_DISK)
lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
else
lun_access = TRANSPORT_LUNFLAGS_READ_WRITE;
}
printk(KERN_INFO "TARGET_CORE[%s]->TPG[%u]_LUN[%u] - Adding %s"
" access for LUN in Demo Mode\n",
TPG_TFO(tpg)->get_fabric_name(),
TPG_TFO(tpg)->tpg_get_tag(tpg), lun->unpacked_lun,
(lun_access == TRANSPORT_LUNFLAGS_READ_WRITE) ?
"READ-WRITE" : "READ-ONLY");
core_update_device_list_for_node(lun, NULL, lun->unpacked_lun,
lun_access, acl, tpg, 1);
spin_lock(&tpg->tpg_lun_lock);
}
spin_unlock(&tpg->tpg_lun_lock);
}
/* core_set_queue_depth_for_node():
*
*
*/
static int core_set_queue_depth_for_node(
struct se_portal_group *tpg,
struct se_node_acl *acl)
{
if (!acl->queue_depth) {
printk(KERN_ERR "Queue depth for %s Initiator Node: %s is 0,"
"defaulting to 1.\n", TPG_TFO(tpg)->get_fabric_name(),
acl->initiatorname);
acl->queue_depth = 1;
}
return 0;
}
/* core_create_device_list_for_node():
*
*
*/
static int core_create_device_list_for_node(struct se_node_acl *nacl)
{
struct se_dev_entry *deve;
int i;
nacl->device_list = kzalloc(sizeof(struct se_dev_entry) *
TRANSPORT_MAX_LUNS_PER_TPG, GFP_KERNEL);
if (!(nacl->device_list)) {
printk(KERN_ERR "Unable to allocate memory for"
" struct se_node_acl->device_list\n");
return -1;
}
for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
deve = &nacl->device_list[i];
atomic_set(&deve->ua_count, 0);
atomic_set(&deve->pr_ref_count, 0);
spin_lock_init(&deve->ua_lock);
INIT_LIST_HEAD(&deve->alua_port_list);
INIT_LIST_HEAD(&deve->ua_list);
}
return 0;
}
/* core_tpg_check_initiator_node_acl()
*
*
*/
struct se_node_acl *core_tpg_check_initiator_node_acl(
struct se_portal_group *tpg,
unsigned char *initiatorname)
{
struct se_node_acl *acl;
acl = core_tpg_get_initiator_node_acl(tpg, initiatorname);
if ((acl))
return acl;
if (!(TPG_TFO(tpg)->tpg_check_demo_mode(tpg)))
return NULL;
acl = TPG_TFO(tpg)->tpg_alloc_fabric_acl(tpg);
if (!(acl))
return NULL;
INIT_LIST_HEAD(&acl->acl_list);
INIT_LIST_HEAD(&acl->acl_sess_list);
spin_lock_init(&acl->device_list_lock);
spin_lock_init(&acl->nacl_sess_lock);
atomic_set(&acl->acl_pr_ref_count, 0);
atomic_set(&acl->mib_ref_count, 0);
acl->queue_depth = TPG_TFO(tpg)->tpg_get_default_depth(tpg);
snprintf(acl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname);
acl->se_tpg = tpg;
acl->acl_index = scsi_get_new_index(SCSI_AUTH_INTR_INDEX);
spin_lock_init(&acl->stats_lock);
acl->dynamic_node_acl = 1;
TPG_TFO(tpg)->set_default_node_attributes(acl);
if (core_create_device_list_for_node(acl) < 0) {
TPG_TFO(tpg)->tpg_release_fabric_acl(tpg, acl);
return NULL;
}
if (core_set_queue_depth_for_node(tpg, acl) < 0) {
core_free_device_list_for_node(acl, tpg);
TPG_TFO(tpg)->tpg_release_fabric_acl(tpg, acl);
return NULL;
}
core_tpg_add_node_to_devs(acl, tpg);
spin_lock_bh(&tpg->acl_node_lock);
list_add_tail(&acl->acl_list, &tpg->acl_node_list);
tpg->num_node_acls++;
spin_unlock_bh(&tpg->acl_node_lock);
printk("%s_TPG[%u] - Added DYNAMIC ACL with TCQ Depth: %d for %s"
" Initiator Node: %s\n", TPG_TFO(tpg)->get_fabric_name(),
TPG_TFO(tpg)->tpg_get_tag(tpg), acl->queue_depth,
TPG_TFO(tpg)->get_fabric_name(), initiatorname);
return acl;
}
EXPORT_SYMBOL(core_tpg_check_initiator_node_acl);
void core_tpg_wait_for_nacl_pr_ref(struct se_node_acl *nacl)
{
while (atomic_read(&nacl->acl_pr_ref_count) != 0)
cpu_relax();
}
void core_tpg_wait_for_mib_ref(struct se_node_acl *nacl)
{
while (atomic_read(&nacl->mib_ref_count) != 0)
cpu_relax();
}
void core_tpg_clear_object_luns(struct se_portal_group *tpg)
{
int i, ret;
struct se_lun *lun;
spin_lock(&tpg->tpg_lun_lock);
for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
lun = &tpg->tpg_lun_list[i];
if ((lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) ||
(lun->lun_se_dev == NULL))
continue;
spin_unlock(&tpg->tpg_lun_lock);
ret = core_dev_del_lun(tpg, lun->unpacked_lun);
spin_lock(&tpg->tpg_lun_lock);
}
spin_unlock(&tpg->tpg_lun_lock);
}
EXPORT_SYMBOL(core_tpg_clear_object_luns);
/* core_tpg_add_initiator_node_acl():
*
*
*/
struct se_node_acl *core_tpg_add_initiator_node_acl(
struct se_portal_group *tpg,
struct se_node_acl *se_nacl,
const char *initiatorname,
u32 queue_depth)
{
struct se_node_acl *acl = NULL;
spin_lock_bh(&tpg->acl_node_lock);
acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname);
if ((acl)) {
if (acl->dynamic_node_acl) {
acl->dynamic_node_acl = 0;
printk(KERN_INFO "%s_TPG[%u] - Replacing dynamic ACL"
" for %s\n", TPG_TFO(tpg)->get_fabric_name(),
TPG_TFO(tpg)->tpg_get_tag(tpg), initiatorname);
spin_unlock_bh(&tpg->acl_node_lock);
/*
* Release the locally allocated struct se_node_acl
* because * core_tpg_add_initiator_node_acl() returned
* a pointer to an existing demo mode node ACL.
*/
if (se_nacl)
TPG_TFO(tpg)->tpg_release_fabric_acl(tpg,
se_nacl);
goto done;
}
printk(KERN_ERR "ACL entry for %s Initiator"
" Node %s already exists for TPG %u, ignoring"
" request.\n", TPG_TFO(tpg)->get_fabric_name(),
initiatorname, TPG_TFO(tpg)->tpg_get_tag(tpg));
spin_unlock_bh(&tpg->acl_node_lock);
return ERR_PTR(-EEXIST);
}
spin_unlock_bh(&tpg->acl_node_lock);
if (!(se_nacl)) {
printk("struct se_node_acl pointer is NULL\n");
return ERR_PTR(-EINVAL);
}
/*
* For v4.x logic the se_node_acl_s is hanging off a fabric
* dependent structure allocated via
* struct target_core_fabric_ops->fabric_make_nodeacl()
*/
acl = se_nacl;
INIT_LIST_HEAD(&acl->acl_list);
INIT_LIST_HEAD(&acl->acl_sess_list);
spin_lock_init(&acl->device_list_lock);
spin_lock_init(&acl->nacl_sess_lock);
atomic_set(&acl->acl_pr_ref_count, 0);
acl->queue_depth = queue_depth;
snprintf(acl->initiatorname, TRANSPORT_IQN_LEN, "%s", initiatorname);
acl->se_tpg = tpg;
acl->acl_index = scsi_get_new_index(SCSI_AUTH_INTR_INDEX);
spin_lock_init(&acl->stats_lock);
TPG_TFO(tpg)->set_default_node_attributes(acl);
if (core_create_device_list_for_node(acl) < 0) {
TPG_TFO(tpg)->tpg_release_fabric_acl(tpg, acl);
return ERR_PTR(-ENOMEM);
}
if (core_set_queue_depth_for_node(tpg, acl) < 0) {
core_free_device_list_for_node(acl, tpg);
TPG_TFO(tpg)->tpg_release_fabric_acl(tpg, acl);
return ERR_PTR(-EINVAL);
}
spin_lock_bh(&tpg->acl_node_lock);
list_add_tail(&acl->acl_list, &tpg->acl_node_list);
tpg->num_node_acls++;
spin_unlock_bh(&tpg->acl_node_lock);
done:
printk(KERN_INFO "%s_TPG[%hu] - Added ACL with TCQ Depth: %d for %s"
" Initiator Node: %s\n", TPG_TFO(tpg)->get_fabric_name(),
TPG_TFO(tpg)->tpg_get_tag(tpg), acl->queue_depth,
TPG_TFO(tpg)->get_fabric_name(), initiatorname);
return acl;
}
EXPORT_SYMBOL(core_tpg_add_initiator_node_acl);
/* core_tpg_del_initiator_node_acl():
*
*
*/
int core_tpg_del_initiator_node_acl(
struct se_portal_group *tpg,
struct se_node_acl *acl,
int force)
{
struct se_session *sess, *sess_tmp;
int dynamic_acl = 0;
spin_lock_bh(&tpg->acl_node_lock);
if (acl->dynamic_node_acl) {
acl->dynamic_node_acl = 0;
dynamic_acl = 1;
}
list_del(&acl->acl_list);
tpg->num_node_acls--;
spin_unlock_bh(&tpg->acl_node_lock);
spin_lock_bh(&tpg->session_lock);
list_for_each_entry_safe(sess, sess_tmp,
&tpg->tpg_sess_list, sess_list) {
if (sess->se_node_acl != acl)
continue;
/*
* Determine if the session needs to be closed by our context.
*/
if (!(TPG_TFO(tpg)->shutdown_session(sess)))
continue;
spin_unlock_bh(&tpg->session_lock);
/*
* If the $FABRIC_MOD session for the Initiator Node ACL exists,
* forcefully shutdown the $FABRIC_MOD session/nexus.
*/
TPG_TFO(tpg)->close_session(sess);
spin_lock_bh(&tpg->session_lock);
}
spin_unlock_bh(&tpg->session_lock);
core_tpg_wait_for_nacl_pr_ref(acl);
core_tpg_wait_for_mib_ref(acl);
core_clear_initiator_node_from_tpg(acl, tpg);
core_free_device_list_for_node(acl, tpg);
printk(KERN_INFO "%s_TPG[%hu] - Deleted ACL with TCQ Depth: %d for %s"
" Initiator Node: %s\n", TPG_TFO(tpg)->get_fabric_name(),
TPG_TFO(tpg)->tpg_get_tag(tpg), acl->queue_depth,
TPG_TFO(tpg)->get_fabric_name(), acl->initiatorname);
return 0;
}
EXPORT_SYMBOL(core_tpg_del_initiator_node_acl);
/* core_tpg_set_initiator_node_queue_depth():
*
*
*/
int core_tpg_set_initiator_node_queue_depth(
struct se_portal_group *tpg,
unsigned char *initiatorname,
u32 queue_depth,
int force)
{
struct se_session *sess, *init_sess = NULL;
struct se_node_acl *acl;
int dynamic_acl = 0;
spin_lock_bh(&tpg->acl_node_lock);
acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname);
if (!(acl)) {
printk(KERN_ERR "Access Control List entry for %s Initiator"
" Node %s does not exists for TPG %hu, ignoring"
" request.\n", TPG_TFO(tpg)->get_fabric_name(),
initiatorname, TPG_TFO(tpg)->tpg_get_tag(tpg));
spin_unlock_bh(&tpg->acl_node_lock);
return -ENODEV;
}
if (acl->dynamic_node_acl) {
acl->dynamic_node_acl = 0;
dynamic_acl = 1;
}
spin_unlock_bh(&tpg->acl_node_lock);
spin_lock_bh(&tpg->session_lock);
list_for_each_entry(sess, &tpg->tpg_sess_list, sess_list) {
if (sess->se_node_acl != acl)
continue;
if (!force) {
printk(KERN_ERR "Unable to change queue depth for %s"
" Initiator Node: %s while session is"
" operational. To forcefully change the queue"
" depth and force session reinstatement"
" use the \"force=1\" parameter.\n",
TPG_TFO(tpg)->get_fabric_name(), initiatorname);
spin_unlock_bh(&tpg->session_lock);
spin_lock_bh(&tpg->acl_node_lock);
if (dynamic_acl)
acl->dynamic_node_acl = 1;
spin_unlock_bh(&tpg->acl_node_lock);
return -EEXIST;
}
/*
* Determine if the session needs to be closed by our context.
*/
if (!(TPG_TFO(tpg)->shutdown_session(sess)))
continue;
init_sess = sess;
break;
}
/*
* User has requested to change the queue depth for a Initiator Node.
* Change the value in the Node's struct se_node_acl, and call
* core_set_queue_depth_for_node() to add the requested queue depth.
*
* Finally call TPG_TFO(tpg)->close_session() to force session
* reinstatement to occur if there is an active session for the
* $FABRIC_MOD Initiator Node in question.
*/
acl->queue_depth = queue_depth;
if (core_set_queue_depth_for_node(tpg, acl) < 0) {
spin_unlock_bh(&tpg->session_lock);
/*
* Force session reinstatement if
* core_set_queue_depth_for_node() failed, because we assume
* the $FABRIC_MOD has already the set session reinstatement
* bit from TPG_TFO(tpg)->shutdown_session() called above.
*/
if (init_sess)
TPG_TFO(tpg)->close_session(init_sess);
spin_lock_bh(&tpg->acl_node_lock);
if (dynamic_acl)
acl->dynamic_node_acl = 1;
spin_unlock_bh(&tpg->acl_node_lock);
return -EINVAL;
}
spin_unlock_bh(&tpg->session_lock);
/*
* If the $FABRIC_MOD session for the Initiator Node ACL exists,
* forcefully shutdown the $FABRIC_MOD session/nexus.
*/
if (init_sess)
TPG_TFO(tpg)->close_session(init_sess);
printk(KERN_INFO "Successfuly changed queue depth to: %d for Initiator"
" Node: %s on %s Target Portal Group: %u\n", queue_depth,
initiatorname, TPG_TFO(tpg)->get_fabric_name(),
TPG_TFO(tpg)->tpg_get_tag(tpg));
spin_lock_bh(&tpg->acl_node_lock);
if (dynamic_acl)
acl->dynamic_node_acl = 1;
spin_unlock_bh(&tpg->acl_node_lock);
return 0;
}
EXPORT_SYMBOL(core_tpg_set_initiator_node_queue_depth);
static int core_tpg_setup_virtual_lun0(struct se_portal_group *se_tpg)
{
/* Set in core_dev_setup_virtual_lun0() */
struct se_device *dev = se_global->g_lun0_dev;
struct se_lun *lun = &se_tpg->tpg_virt_lun0;
u32 lun_access = TRANSPORT_LUNFLAGS_READ_ONLY;
int ret;
lun->unpacked_lun = 0;
lun->lun_status = TRANSPORT_LUN_STATUS_FREE;
atomic_set(&lun->lun_acl_count, 0);
init_completion(&lun->lun_shutdown_comp);
INIT_LIST_HEAD(&lun->lun_acl_list);
INIT_LIST_HEAD(&lun->lun_cmd_list);
spin_lock_init(&lun->lun_acl_lock);
spin_lock_init(&lun->lun_cmd_lock);
spin_lock_init(&lun->lun_sep_lock);
ret = core_tpg_post_addlun(se_tpg, lun, lun_access, dev);
if (ret < 0)
return -1;
return 0;
}
static void core_tpg_release_virtual_lun0(struct se_portal_group *se_tpg)
{
struct se_lun *lun = &se_tpg->tpg_virt_lun0;
core_tpg_post_dellun(se_tpg, lun);
}
int core_tpg_register(
struct target_core_fabric_ops *tfo,
struct se_wwn *se_wwn,
struct se_portal_group *se_tpg,
void *tpg_fabric_ptr,
int se_tpg_type)
{
struct se_lun *lun;
u32 i;
se_tpg->tpg_lun_list = kzalloc((sizeof(struct se_lun) *
TRANSPORT_MAX_LUNS_PER_TPG), GFP_KERNEL);
if (!(se_tpg->tpg_lun_list)) {
printk(KERN_ERR "Unable to allocate struct se_portal_group->"
"tpg_lun_list\n");
return -ENOMEM;
}
for (i = 0; i < TRANSPORT_MAX_LUNS_PER_TPG; i++) {
lun = &se_tpg->tpg_lun_list[i];
lun->unpacked_lun = i;
lun->lun_status = TRANSPORT_LUN_STATUS_FREE;
atomic_set(&lun->lun_acl_count, 0);
init_completion(&lun->lun_shutdown_comp);
INIT_LIST_HEAD(&lun->lun_acl_list);
INIT_LIST_HEAD(&lun->lun_cmd_list);
spin_lock_init(&lun->lun_acl_lock);
spin_lock_init(&lun->lun_cmd_lock);
spin_lock_init(&lun->lun_sep_lock);
}
se_tpg->se_tpg_type = se_tpg_type;
se_tpg->se_tpg_fabric_ptr = tpg_fabric_ptr;
se_tpg->se_tpg_tfo = tfo;
se_tpg->se_tpg_wwn = se_wwn;
atomic_set(&se_tpg->tpg_pr_ref_count, 0);
INIT_LIST_HEAD(&se_tpg->acl_node_list);
INIT_LIST_HEAD(&se_tpg->se_tpg_list);
INIT_LIST_HEAD(&se_tpg->tpg_sess_list);
spin_lock_init(&se_tpg->acl_node_lock);
spin_lock_init(&se_tpg->session_lock);
spin_lock_init(&se_tpg->tpg_lun_lock);
if (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) {
if (core_tpg_setup_virtual_lun0(se_tpg) < 0) {
kfree(se_tpg);
return -ENOMEM;
}
}
spin_lock_bh(&se_global->se_tpg_lock);
list_add_tail(&se_tpg->se_tpg_list, &se_global->g_se_tpg_list);
spin_unlock_bh(&se_global->se_tpg_lock);
printk(KERN_INFO "TARGET_CORE[%s]: Allocated %s struct se_portal_group for"
" endpoint: %s, Portal Tag: %u\n", tfo->get_fabric_name(),
(se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) ?
"Normal" : "Discovery", (tfo->tpg_get_wwn(se_tpg) == NULL) ?
"None" : tfo->tpg_get_wwn(se_tpg), tfo->tpg_get_tag(se_tpg));
return 0;
}
EXPORT_SYMBOL(core_tpg_register);
int core_tpg_deregister(struct se_portal_group *se_tpg)
{
printk(KERN_INFO "TARGET_CORE[%s]: Deallocating %s struct se_portal_group"
" for endpoint: %s Portal Tag %u\n",
(se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL) ?
"Normal" : "Discovery", TPG_TFO(se_tpg)->get_fabric_name(),
TPG_TFO(se_tpg)->tpg_get_wwn(se_tpg),
TPG_TFO(se_tpg)->tpg_get_tag(se_tpg));
spin_lock_bh(&se_global->se_tpg_lock);
list_del(&se_tpg->se_tpg_list);
spin_unlock_bh(&se_global->se_tpg_lock);
while (atomic_read(&se_tpg->tpg_pr_ref_count) != 0)
cpu_relax();
if (se_tpg->se_tpg_type == TRANSPORT_TPG_TYPE_NORMAL)
core_tpg_release_virtual_lun0(se_tpg);
se_tpg->se_tpg_fabric_ptr = NULL;
kfree(se_tpg->tpg_lun_list);
return 0;
}
EXPORT_SYMBOL(core_tpg_deregister);
struct se_lun *core_tpg_pre_addlun(
struct se_portal_group *tpg,
u32 unpacked_lun)
{
struct se_lun *lun;
if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
printk(KERN_ERR "%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER_TPG"
"-1: %u for Target Portal Group: %u\n",
TPG_TFO(tpg)->get_fabric_name(),
unpacked_lun, TRANSPORT_MAX_LUNS_PER_TPG-1,
TPG_TFO(tpg)->tpg_get_tag(tpg));
return ERR_PTR(-EOVERFLOW);
}
spin_lock(&tpg->tpg_lun_lock);
lun = &tpg->tpg_lun_list[unpacked_lun];
if (lun->lun_status == TRANSPORT_LUN_STATUS_ACTIVE) {
printk(KERN_ERR "TPG Logical Unit Number: %u is already active"
" on %s Target Portal Group: %u, ignoring request.\n",
unpacked_lun, TPG_TFO(tpg)->get_fabric_name(),
TPG_TFO(tpg)->tpg_get_tag(tpg));
spin_unlock(&tpg->tpg_lun_lock);
return ERR_PTR(-EINVAL);
}
spin_unlock(&tpg->tpg_lun_lock);
return lun;
}
int core_tpg_post_addlun(
struct se_portal_group *tpg,
struct se_lun *lun,
u32 lun_access,
void *lun_ptr)
{
if (core_dev_export(lun_ptr, tpg, lun) < 0)
return -1;
spin_lock(&tpg->tpg_lun_lock);
lun->lun_access = lun_access;
lun->lun_status = TRANSPORT_LUN_STATUS_ACTIVE;
spin_unlock(&tpg->tpg_lun_lock);
return 0;
}
static void core_tpg_shutdown_lun(
struct se_portal_group *tpg,
struct se_lun *lun)
{
core_clear_lun_from_tpg(lun, tpg);
transport_clear_lun_from_sessions(lun);
}
struct se_lun *core_tpg_pre_dellun(
struct se_portal_group *tpg,
u32 unpacked_lun,
int *ret)
{
struct se_lun *lun;
if (unpacked_lun > (TRANSPORT_MAX_LUNS_PER_TPG-1)) {
printk(KERN_ERR "%s LUN: %u exceeds TRANSPORT_MAX_LUNS_PER_TPG"
"-1: %u for Target Portal Group: %u\n",
TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
TRANSPORT_MAX_LUNS_PER_TPG-1,
TPG_TFO(tpg)->tpg_get_tag(tpg));
return ERR_PTR(-EOVERFLOW);
}
spin_lock(&tpg->tpg_lun_lock);
lun = &tpg->tpg_lun_list[unpacked_lun];
if (lun->lun_status != TRANSPORT_LUN_STATUS_ACTIVE) {
printk(KERN_ERR "%s Logical Unit Number: %u is not active on"
" Target Portal Group: %u, ignoring request.\n",
TPG_TFO(tpg)->get_fabric_name(), unpacked_lun,
TPG_TFO(tpg)->tpg_get_tag(tpg));
spin_unlock(&tpg->tpg_lun_lock);
return ERR_PTR(-ENODEV);
}
spin_unlock(&tpg->tpg_lun_lock);
return lun;
}
int core_tpg_post_dellun(
struct se_portal_group *tpg,
struct se_lun *lun)
{
core_tpg_shutdown_lun(tpg, lun);
core_dev_unexport(lun->lun_se_dev, tpg, lun);
spin_lock(&tpg->tpg_lun_lock);
lun->lun_status = TRANSPORT_LUN_STATUS_FREE;
spin_unlock(&tpg->tpg_lun_lock);
return 0;
}

6134
drivers/target/target_core_transport.c Normal file
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File diff suppressed because it is too large Load Diff

332
drivers/target/target_core_ua.c Normal file
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@ -0,0 +1,332 @@
/*******************************************************************************
* Filename: target_core_ua.c
*
* This file contains logic for SPC-3 Unit Attention emulation
*
* Copyright (c) 2009,2010 Rising Tide Systems
* Copyright (c) 2009,2010 Linux-iSCSI.org
*
* Nicholas A. Bellinger <nab@kernel.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
******************************************************************************/
#include <linux/version.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <target/target_core_base.h>
#include <target/target_core_device.h>
#include <target/target_core_transport.h>
#include <target/target_core_fabric_ops.h>
#include <target/target_core_configfs.h>
#include "target_core_alua.h"
#include "target_core_hba.h"
#include "target_core_pr.h"
#include "target_core_ua.h"
int core_scsi3_ua_check(
struct se_cmd *cmd,
unsigned char *cdb)
{
struct se_dev_entry *deve;
struct se_session *sess = cmd->se_sess;
struct se_node_acl *nacl;
if (!(sess))
return 0;
nacl = sess->se_node_acl;
if (!(nacl))
return 0;
deve = &nacl->device_list[cmd->orig_fe_lun];
if (!(atomic_read(&deve->ua_count)))
return 0;
/*
* From sam4r14, section 5.14 Unit attention condition:
*
* a) if an INQUIRY command enters the enabled command state, the
* device server shall process the INQUIRY command and shall neither
* report nor clear any unit attention condition;
* b) if a REPORT LUNS command enters the enabled command state, the
* device server shall process the REPORT LUNS command and shall not
* report any unit attention condition;
* e) if a REQUEST SENSE command enters the enabled command state while
* a unit attention condition exists for the SCSI initiator port
* associated with the I_T nexus on which the REQUEST SENSE command
* was received, then the device server shall process the command
* and either:
*/
switch (cdb[0]) {
case INQUIRY:
case REPORT_LUNS:
case REQUEST_SENSE:
return 0;
default:
return -1;
}
return -1;
}
int core_scsi3_ua_allocate(
struct se_node_acl *nacl,
u32 unpacked_lun,
u8 asc,
u8 ascq)
{
struct se_dev_entry *deve;
struct se_ua *ua, *ua_p, *ua_tmp;
/*
* PASSTHROUGH OPS
*/
if (!(nacl))
return -1;
ua = kmem_cache_zalloc(se_ua_cache, GFP_ATOMIC);
if (!(ua)) {
printk(KERN_ERR "Unable to allocate struct se_ua\n");
return -1;
}
INIT_LIST_HEAD(&ua->ua_dev_list);
INIT_LIST_HEAD(&ua->ua_nacl_list);
ua->ua_nacl = nacl;
ua->ua_asc = asc;
ua->ua_ascq = ascq;
spin_lock_irq(&nacl->device_list_lock);
deve = &nacl->device_list[unpacked_lun];
spin_lock(&deve->ua_lock);
list_for_each_entry_safe(ua_p, ua_tmp, &deve->ua_list, ua_nacl_list) {
/*
* Do not report the same UNIT ATTENTION twice..
*/
if ((ua_p->ua_asc == asc) && (ua_p->ua_ascq == ascq)) {
spin_unlock(&deve->ua_lock);
spin_unlock_irq(&nacl->device_list_lock);
kmem_cache_free(se_ua_cache, ua);
return 0;
}
/*
* Attach the highest priority Unit Attention to
* the head of the list following sam4r14,
* Section 5.14 Unit Attention Condition:
*
* POWER ON, RESET, OR BUS DEVICE RESET OCCURRED highest
* POWER ON OCCURRED or
* DEVICE INTERNAL RESET
* SCSI BUS RESET OCCURRED or
* MICROCODE HAS BEEN CHANGED or
* protocol specific
* BUS DEVICE RESET FUNCTION OCCURRED
* I_T NEXUS LOSS OCCURRED
* COMMANDS CLEARED BY POWER LOSS NOTIFICATION
* all others Lowest
*
* Each of the ASCQ codes listed above are defined in
* the 29h ASC family, see spc4r17 Table D.1
*/
if (ua_p->ua_asc == 0x29) {
if ((asc == 0x29) && (ascq > ua_p->ua_ascq))
list_add(&ua->ua_nacl_list,
&deve->ua_list);
else
list_add_tail(&ua->ua_nacl_list,
&deve->ua_list);
} else if (ua_p->ua_asc == 0x2a) {
/*
* Incoming Family 29h ASCQ codes will override
* Family 2AHh ASCQ codes for Unit Attention condition.
*/
if ((asc == 0x29) || (ascq > ua_p->ua_asc))
list_add(&ua->ua_nacl_list,
&deve->ua_list);
else
list_add_tail(&ua->ua_nacl_list,
&deve->ua_list);
} else
list_add_tail(&ua->ua_nacl_list,
&deve->ua_list);
spin_unlock(&deve->ua_lock);
spin_unlock_irq(&nacl->device_list_lock);
atomic_inc(&deve->ua_count);
smp_mb__after_atomic_inc();
return 0;
}
list_add_tail(&ua->ua_nacl_list, &deve->ua_list);
spin_unlock(&deve->ua_lock);
spin_unlock_irq(&nacl->device_list_lock);
printk(KERN_INFO "[%s]: Allocated UNIT ATTENTION, mapped LUN: %u, ASC:"
" 0x%02x, ASCQ: 0x%02x\n",
TPG_TFO(nacl->se_tpg)->get_fabric_name(), unpacked_lun,
asc, ascq);
atomic_inc(&deve->ua_count);
smp_mb__after_atomic_inc();
return 0;
}
void core_scsi3_ua_release_all(
struct se_dev_entry *deve)
{
struct se_ua *ua, *ua_p;
spin_lock(&deve->ua_lock);
list_for_each_entry_safe(ua, ua_p, &deve->ua_list, ua_nacl_list) {
list_del(&ua->ua_nacl_list);
kmem_cache_free(se_ua_cache, ua);
atomic_dec(&deve->ua_count);
smp_mb__after_atomic_dec();
}
spin_unlock(&deve->ua_lock);
}
void core_scsi3_ua_for_check_condition(
struct se_cmd *cmd,
u8 *asc,
u8 *ascq)
{
struct se_device *dev = SE_DEV(cmd);
struct se_dev_entry *deve;
struct se_session *sess = cmd->se_sess;
struct se_node_acl *nacl;
struct se_ua *ua = NULL, *ua_p;
int head = 1;
if (!(sess))
return;
nacl = sess->se_node_acl;
if (!(nacl))
return;
spin_lock_irq(&nacl->device_list_lock);
deve = &nacl->device_list[cmd->orig_fe_lun];
if (!(atomic_read(&deve->ua_count))) {
spin_unlock_irq(&nacl->device_list_lock);
return;
}
/*
* The highest priority Unit Attentions are placed at the head of the
* struct se_dev_entry->ua_list, and will be returned in CHECK_CONDITION +
* sense data for the received CDB.
*/
spin_lock(&deve->ua_lock);
list_for_each_entry_safe(ua, ua_p, &deve->ua_list, ua_nacl_list) {
/*
* For ua_intlck_ctrl code not equal to 00b, only report the
* highest priority UNIT_ATTENTION and ASC/ASCQ without
* clearing it.
*/
if (DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl != 0) {
*asc = ua->ua_asc;
*ascq = ua->ua_ascq;
break;
}
/*
* Otherwise for the default 00b, release the UNIT ATTENTION
* condition. Return the ASC/ASCQ of the higest priority UA
* (head of the list) in the outgoing CHECK_CONDITION + sense.
*/
if (head) {
*asc = ua->ua_asc;
*ascq = ua->ua_ascq;
head = 0;
}
list_del(&ua->ua_nacl_list);
kmem_cache_free(se_ua_cache, ua);
atomic_dec(&deve->ua_count);
smp_mb__after_atomic_dec();
}
spin_unlock(&deve->ua_lock);
spin_unlock_irq(&nacl->device_list_lock);
printk(KERN_INFO "[%s]: %s UNIT ATTENTION condition with"
" INTLCK_CTRL: %d, mapped LUN: %u, got CDB: 0x%02x"
" reported ASC: 0x%02x, ASCQ: 0x%02x\n",
TPG_TFO(nacl->se_tpg)->get_fabric_name(),
(DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl != 0) ? "Reporting" :
"Releasing", DEV_ATTRIB(dev)->emulate_ua_intlck_ctrl,
cmd->orig_fe_lun, T_TASK(cmd)->t_task_cdb[0], *asc, *ascq);
}
int core_scsi3_ua_clear_for_request_sense(
struct se_cmd *cmd,
u8 *asc,
u8 *ascq)
{
struct se_dev_entry *deve;
struct se_session *sess = cmd->se_sess;
struct se_node_acl *nacl;
struct se_ua *ua = NULL, *ua_p;
int head = 1;
if (!(sess))
return -1;
nacl = sess->se_node_acl;
if (!(nacl))
return -1;
spin_lock_irq(&nacl->device_list_lock);
deve = &nacl->device_list[cmd->orig_fe_lun];
if (!(atomic_read(&deve->ua_count))) {
spin_unlock_irq(&nacl->device_list_lock);
return -1;
}
/*
* The highest priority Unit Attentions are placed at the head of the
* struct se_dev_entry->ua_list. The First (and hence highest priority)
* ASC/ASCQ will be returned in REQUEST_SENSE payload data for the
* matching struct se_lun.
*
* Once the returning ASC/ASCQ values are set, we go ahead and
* release all of the Unit Attention conditions for the assoicated
* struct se_lun.
*/
spin_lock(&deve->ua_lock);
list_for_each_entry_safe(ua, ua_p, &deve->ua_list, ua_nacl_list) {
if (head) {
*asc = ua->ua_asc;
*ascq = ua->ua_ascq;
head = 0;
}
list_del(&ua->ua_nacl_list);
kmem_cache_free(se_ua_cache, ua);
atomic_dec(&deve->ua_count);
smp_mb__after_atomic_dec();
}
spin_unlock(&deve->ua_lock);
spin_unlock_irq(&nacl->device_list_lock);
printk(KERN_INFO "[%s]: Released UNIT ATTENTION condition, mapped"
" LUN: %u, got REQUEST_SENSE reported ASC: 0x%02x,"
" ASCQ: 0x%02x\n", TPG_TFO(nacl->se_tpg)->get_fabric_name(),
cmd->orig_fe_lun, *asc, *ascq);
return (head) ? -1 : 0;
}

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#ifndef TARGET_CORE_UA_H
/*
* From spc4r17, Table D.1: ASC and ASCQ Assignement
*/
#define ASCQ_29H_POWER_ON_RESET_OR_BUS_DEVICE_RESET_OCCURED 0x00
#define ASCQ_29H_POWER_ON_OCCURRED 0x01
#define ASCQ_29H_SCSI_BUS_RESET_OCCURED 0x02
#define ASCQ_29H_BUS_DEVICE_RESET_FUNCTION_OCCURRED 0x03
#define ASCQ_29H_DEVICE_INTERNAL_RESET 0x04
#define ASCQ_29H_TRANSCEIVER_MODE_CHANGED_TO_SINGLE_ENDED 0x05
#define ASCQ_29H_TRANSCEIVER_MODE_CHANGED_TO_LVD 0x06
#define ASCQ_29H_NEXUS_LOSS_OCCURRED 0x07
#define ASCQ_2AH_PARAMETERS_CHANGED 0x00
#define ASCQ_2AH_MODE_PARAMETERS_CHANGED 0x01
#define ASCQ_2AH_LOG_PARAMETERS_CHANGED 0x02
#define ASCQ_2AH_RESERVATIONS_PREEMPTED 0x03
#define ASCQ_2AH_RESERVATIONS_RELEASED 0x04
#define ASCQ_2AH_REGISTRATIONS_PREEMPTED 0x05
#define ASCQ_2AH_ASYMMETRIC_ACCESS_STATE_CHANGED 0x06
#define ASCQ_2AH_IMPLICT_ASYMMETRIC_ACCESS_STATE_TRANSITION_FAILED 0x07
#define ASCQ_2AH_PRIORITY_CHANGED 0x08
#define ASCQ_2CH_PREVIOUS_RESERVATION_CONFLICT_STATUS 0x09
extern struct kmem_cache *se_ua_cache;
extern int core_scsi3_ua_check(struct se_cmd *, unsigned char *);
extern int core_scsi3_ua_allocate(struct se_node_acl *, u32, u8, u8);
extern void core_scsi3_ua_release_all(struct se_dev_entry *);
extern void core_scsi3_ua_for_check_condition(struct se_cmd *, u8 *, u8 *);
extern int core_scsi3_ua_clear_for_request_sense(struct se_cmd *,
u8 *, u8 *);
#endif /* TARGET_CORE_UA_H */

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/* -*- mode: c; c-basic-offset: 8; -*-
* vim: noexpandtab sw=8 ts=8 sts=0:
*
* configfs_macros.h - extends macros for configfs
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 021110-1307, USA.
*
* Based on sysfs:
* sysfs is Copyright (C) 2001, 2002, 2003 Patrick Mochel
*
* Based on kobject.h:
* Copyright (c) 2002-2003 Patrick Mochel
* Copyright (c) 2002-2003 Open Source Development Labs
*
* configfs Copyright (C) 2005 Oracle. All rights reserved.
*
* Added CONFIGFS_EATTR() macros from original configfs.h macros
* Copright (C) 2008-2009 Nicholas A. Bellinger <nab@linux-iscsi.org>
*
* Please read Documentation/filesystems/configfs.txt before using the
* configfs interface, ESPECIALLY the parts about reference counts and
* item destructors.
*/
#ifndef _CONFIGFS_MACROS_H_
#define _CONFIGFS_MACROS_H_
#include <linux/configfs.h>
/*
* Users often need to create attribute structures for their configurable
* attributes, containing a configfs_attribute member and function pointers
* for the show() and store() operations on that attribute. If they don't
* need anything else on the extended attribute structure, they can use
* this macro to define it. The argument _name isends up as
* 'struct _name_attribute, as well as names of to CONFIGFS_ATTR_OPS() below.
* The argument _item is the name of the structure containing the
* struct config_item or struct config_group structure members
*/
#define CONFIGFS_EATTR_STRUCT(_name, _item) \
struct _name##_attribute { \
struct configfs_attribute attr; \
ssize_t (*show)(struct _item *, char *); \
ssize_t (*store)(struct _item *, const char *, size_t); \
}
/*
* With the extended attribute structure, users can use this macro
* (similar to sysfs' __ATTR) to make defining attributes easier.
* An example:
* #define MYITEM_EATTR(_name, _mode, _show, _store) \
* struct myitem_attribute childless_attr_##_name = \
* __CONFIGFS_EATTR(_name, _mode, _show, _store)
*/
#define __CONFIGFS_EATTR(_name, _mode, _show, _store) \
{ \
.attr = { \
.ca_name = __stringify(_name), \
.ca_mode = _mode, \
.ca_owner = THIS_MODULE, \
}, \
.show = _show, \
.store = _store, \
}
/* Here is a readonly version, only requiring a show() operation */
#define __CONFIGFS_EATTR_RO(_name, _show) \
{ \
.attr = { \
.ca_name = __stringify(_name), \
.ca_mode = 0444, \
.ca_owner = THIS_MODULE, \
}, \
.show = _show, \
}
/*
* With these extended attributes, the simple show_attribute() and
* store_attribute() operations need to call the show() and store() of the
* attributes. This is a common pattern, so we provide a macro to define
* them. The argument _name is the name of the attribute defined by
* CONFIGFS_ATTR_STRUCT(). The argument _item is the name of the structure
* containing the struct config_item or struct config_group structure member.
* The argument _item_member is the actual name of the struct config_* struct
* in your _item structure. Meaning my_structure->some_config_group.
* ^^_item^^^^^ ^^_item_member^^^
* This macro expects the attributes to be named "struct <name>_attribute".
*/
#define CONFIGFS_EATTR_OPS_TO_FUNC(_name, _item, _item_member) \
static struct _item *to_##_name(struct config_item *ci) \
{ \
return (ci) ? container_of(to_config_group(ci), struct _item, \
_item_member) : NULL; \
}
#define CONFIGFS_EATTR_OPS_SHOW(_name, _item) \
static ssize_t _name##_attr_show(struct config_item *item, \
struct configfs_attribute *attr, \
char *page) \
{ \
struct _item *_item = to_##_name(item); \
struct _name##_attribute * _name##_attr = \
container_of(attr, struct _name##_attribute, attr); \
ssize_t ret = 0; \
\
if (_name##_attr->show) \
ret = _name##_attr->show(_item, page); \
return ret; \
}
#define CONFIGFS_EATTR_OPS_STORE(_name, _item) \
static ssize_t _name##_attr_store(struct config_item *item, \
struct configfs_attribute *attr, \
const char *page, size_t count) \
{ \
struct _item *_item = to_##_name(item); \
struct _name##_attribute * _name##_attr = \
container_of(attr, struct _name##_attribute, attr); \
ssize_t ret = -EINVAL; \
\
if (_name##_attr->store) \
ret = _name##_attr->store(_item, page, count); \
return ret; \
}
#define CONFIGFS_EATTR_OPS(_name, _item, _item_member) \
CONFIGFS_EATTR_OPS_TO_FUNC(_name, _item, _item_member); \
CONFIGFS_EATTR_OPS_SHOW(_name, _item); \
CONFIGFS_EATTR_OPS_STORE(_name, _item);
#define CONFIGFS_EATTR_OPS_RO(_name, _item, _item_member) \
CONFIGFS_EATTR_OPS_TO_FUNC(_name, _item, _item_member); \
CONFIGFS_EATTR_OPS_SHOW(_name, _item);
#endif /* _CONFIGFS_MACROS_H_ */

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#ifndef TARGET_CORE_BASE_H
#define TARGET_CORE_BASE_H
#include <linux/in.h>
#include <linux/configfs.h>
#include <linux/dma-mapping.h>
#include <linux/blkdev.h>
#include <scsi/scsi_cmnd.h>
#include <net/sock.h>
#include <net/tcp.h>
#include "target_core_mib.h"
#define TARGET_CORE_MOD_VERSION "v4.0.0-rc6"
#define SHUTDOWN_SIGS (sigmask(SIGKILL)|sigmask(SIGINT)|sigmask(SIGABRT))
/* Used by transport_generic_allocate_iovecs() */
#define TRANSPORT_IOV_DATA_BUFFER 5
/* Maximum Number of LUNs per Target Portal Group */
#define TRANSPORT_MAX_LUNS_PER_TPG 256
/*
* By default we use 32-byte CDBs in TCM Core and subsystem plugin code.
*
* Note that both include/scsi/scsi_cmnd.h:MAX_COMMAND_SIZE and
* include/linux/blkdev.h:BLOCK_MAX_CDB as of v2.6.36-rc4 still use
* 16-byte CDBs by default and require an extra allocation for
* 32-byte CDBs to becasue of legacy issues.
*
* Within TCM Core there are no such legacy limitiations, so we go ahead
* use 32-byte CDBs by default and use include/scsi/scsi.h:scsi_command_size()
* within all TCM Core and subsystem plugin code.
*/
#define TCM_MAX_COMMAND_SIZE 32
/*
* From include/scsi/scsi_cmnd.h:SCSI_SENSE_BUFFERSIZE, currently
* defined 96, but the real limit is 252 (or 260 including the header)
*/
#define TRANSPORT_SENSE_BUFFER SCSI_SENSE_BUFFERSIZE
/* Used by transport_send_check_condition_and_sense() */
#define SPC_SENSE_KEY_OFFSET 2
#define SPC_ASC_KEY_OFFSET 12
#define SPC_ASCQ_KEY_OFFSET 13
#define TRANSPORT_IQN_LEN 224
/* Used by target_core_store_alua_lu_gp() and target_core_alua_lu_gp_show_attr_members() */
#define LU_GROUP_NAME_BUF 256
/* Used by core_alua_store_tg_pt_gp_info() and target_core_alua_tg_pt_gp_show_attr_members() */
#define TG_PT_GROUP_NAME_BUF 256
/* Used to parse VPD into struct t10_vpd */
#define VPD_TMP_BUF_SIZE 128
/* Used by transport_generic_cmd_sequencer() */
#define READ_BLOCK_LEN 6
#define READ_CAP_LEN 8
#define READ_POSITION_LEN 20
#define INQUIRY_LEN 36
/* Used by transport_get_inquiry_vpd_serial() */
#define INQUIRY_VPD_SERIAL_LEN 254
/* Used by transport_get_inquiry_vpd_device_ident() */
#define INQUIRY_VPD_DEVICE_IDENTIFIER_LEN 254
/* struct se_hba->hba_flags */
enum hba_flags_table {
HBA_FLAGS_INTERNAL_USE = 0x01,
HBA_FLAGS_PSCSI_MODE = 0x02,
};
/* struct se_lun->lun_status */
enum transport_lun_status_table {
TRANSPORT_LUN_STATUS_FREE = 0,
TRANSPORT_LUN_STATUS_ACTIVE = 1,
};
/* struct se_portal_group->se_tpg_type */
enum transport_tpg_type_table {
TRANSPORT_TPG_TYPE_NORMAL = 0,
TRANSPORT_TPG_TYPE_DISCOVERY = 1,
};
/* Used for generate timer flags */
enum timer_flags_table {
TF_RUNNING = 0x01,
TF_STOP = 0x02,
};
/* Special transport agnostic struct se_cmd->t_states */
enum transport_state_table {
TRANSPORT_NO_STATE = 0,
TRANSPORT_NEW_CMD = 1,
TRANSPORT_DEFERRED_CMD = 2,
TRANSPORT_WRITE_PENDING = 3,
TRANSPORT_PROCESS_WRITE = 4,
TRANSPORT_PROCESSING = 5,
TRANSPORT_COMPLETE_OK = 6,
TRANSPORT_COMPLETE_FAILURE = 7,
TRANSPORT_COMPLETE_TIMEOUT = 8,
TRANSPORT_PROCESS_TMR = 9,
TRANSPORT_TMR_COMPLETE = 10,
TRANSPORT_ISTATE_PROCESSING = 11,
TRANSPORT_ISTATE_PROCESSED = 12,
TRANSPORT_KILL = 13,
TRANSPORT_REMOVE = 14,
TRANSPORT_FREE = 15,
TRANSPORT_NEW_CMD_MAP = 16,
};
/* Used for struct se_cmd->se_cmd_flags */
enum se_cmd_flags_table {
SCF_SUPPORTED_SAM_OPCODE = 0x00000001,
SCF_TRANSPORT_TASK_SENSE = 0x00000002,
SCF_EMULATED_TASK_SENSE = 0x00000004,
SCF_SCSI_DATA_SG_IO_CDB = 0x00000008,
SCF_SCSI_CONTROL_SG_IO_CDB = 0x00000010,
SCF_SCSI_CONTROL_NONSG_IO_CDB = 0x00000020,
SCF_SCSI_NON_DATA_CDB = 0x00000040,
SCF_SCSI_CDB_EXCEPTION = 0x00000080,
SCF_SCSI_RESERVATION_CONFLICT = 0x00000100,
SCF_CMD_PASSTHROUGH_NOALLOC = 0x00000200,
SCF_SE_CMD_FAILED = 0x00000400,
SCF_SE_LUN_CMD = 0x00000800,
SCF_SE_ALLOW_EOO = 0x00001000,
SCF_SE_DISABLE_ONLINE_CHECK = 0x00002000,
SCF_SENT_CHECK_CONDITION = 0x00004000,
SCF_OVERFLOW_BIT = 0x00008000,
SCF_UNDERFLOW_BIT = 0x00010000,
SCF_SENT_DELAYED_TAS = 0x00020000,
SCF_ALUA_NON_OPTIMIZED = 0x00040000,
SCF_DELAYED_CMD_FROM_SAM_ATTR = 0x00080000,
SCF_PASSTHROUGH_SG_TO_MEM = 0x00100000,
SCF_PASSTHROUGH_CONTIG_TO_SG = 0x00200000,
SCF_PASSTHROUGH_SG_TO_MEM_NOALLOC = 0x00400000,
SCF_EMULATE_SYNC_CACHE = 0x00800000,
SCF_EMULATE_CDB_ASYNC = 0x01000000,
SCF_EMULATE_SYNC_UNMAP = 0x02000000
};
/* struct se_dev_entry->lun_flags and struct se_lun->lun_access */
enum transport_lunflags_table {
TRANSPORT_LUNFLAGS_NO_ACCESS = 0x00,
TRANSPORT_LUNFLAGS_INITIATOR_ACCESS = 0x01,
TRANSPORT_LUNFLAGS_READ_ONLY = 0x02,
TRANSPORT_LUNFLAGS_READ_WRITE = 0x04,
};
/* struct se_device->dev_status */
enum transport_device_status_table {
TRANSPORT_DEVICE_ACTIVATED = 0x01,
TRANSPORT_DEVICE_DEACTIVATED = 0x02,
TRANSPORT_DEVICE_QUEUE_FULL = 0x04,
TRANSPORT_DEVICE_SHUTDOWN = 0x08,
TRANSPORT_DEVICE_OFFLINE_ACTIVATED = 0x10,
TRANSPORT_DEVICE_OFFLINE_DEACTIVATED = 0x20,
};
/*
* Used by transport_send_check_condition_and_sense() and se_cmd->scsi_sense_reason
* to signal which ASC/ASCQ sense payload should be built.
*/
enum tcm_sense_reason_table {
TCM_NON_EXISTENT_LUN = 0x01,
TCM_UNSUPPORTED_SCSI_OPCODE = 0x02,
TCM_INCORRECT_AMOUNT_OF_DATA = 0x03,
TCM_UNEXPECTED_UNSOLICITED_DATA = 0x04,
TCM_SERVICE_CRC_ERROR = 0x05,
TCM_SNACK_REJECTED = 0x06,
TCM_SECTOR_COUNT_TOO_MANY = 0x07,
TCM_INVALID_CDB_FIELD = 0x08,
TCM_INVALID_PARAMETER_LIST = 0x09,
TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE = 0x0a,
TCM_UNKNOWN_MODE_PAGE = 0x0b,
TCM_WRITE_PROTECTED = 0x0c,
TCM_CHECK_CONDITION_ABORT_CMD = 0x0d,
TCM_CHECK_CONDITION_UNIT_ATTENTION = 0x0e,
TCM_CHECK_CONDITION_NOT_READY = 0x0f,
};
struct se_obj {
atomic_t obj_access_count;
} ____cacheline_aligned;
/*
* Used by TCM Core internally to signal if ALUA emulation is enabled or
* disabled, or running in with TCM/pSCSI passthrough mode
*/
typedef enum {
SPC_ALUA_PASSTHROUGH,
SPC2_ALUA_DISABLED,
SPC3_ALUA_EMULATED
} t10_alua_index_t;
/*
* Used by TCM Core internally to signal if SAM Task Attribute emulation
* is enabled or disabled, or running in with TCM/pSCSI passthrough mode
*/
typedef enum {
SAM_TASK_ATTR_PASSTHROUGH,
SAM_TASK_ATTR_UNTAGGED,
SAM_TASK_ATTR_EMULATED
} t10_task_attr_index_t;
struct se_cmd;
struct t10_alua {
t10_alua_index_t alua_type;
/* ALUA Target Port Group ID */
u16 alua_tg_pt_gps_counter;
u32 alua_tg_pt_gps_count;
spinlock_t tg_pt_gps_lock;
struct se_subsystem_dev *t10_sub_dev;
/* Used for default ALUA Target Port Group */
struct t10_alua_tg_pt_gp *default_tg_pt_gp;
/* Used for default ALUA Target Port Group ConfigFS group */
struct config_group alua_tg_pt_gps_group;
int (*alua_state_check)(struct se_cmd *, unsigned char *, u8 *);
struct list_head tg_pt_gps_list;
} ____cacheline_aligned;
struct t10_alua_lu_gp {
u16 lu_gp_id;
int lu_gp_valid_id;
u32 lu_gp_members;
atomic_t lu_gp_shutdown;
atomic_t lu_gp_ref_cnt;
spinlock_t lu_gp_lock;
struct config_group lu_gp_group;
struct list_head lu_gp_list;
struct list_head lu_gp_mem_list;
} ____cacheline_aligned;
struct t10_alua_lu_gp_member {
int lu_gp_assoc:1;
atomic_t lu_gp_mem_ref_cnt;
spinlock_t lu_gp_mem_lock;
struct t10_alua_lu_gp *lu_gp;
struct se_device *lu_gp_mem_dev;
struct list_head lu_gp_mem_list;
} ____cacheline_aligned;
struct t10_alua_tg_pt_gp {
u16 tg_pt_gp_id;
int tg_pt_gp_valid_id;
int tg_pt_gp_alua_access_status;
int tg_pt_gp_alua_access_type;
int tg_pt_gp_nonop_delay_msecs;
int tg_pt_gp_trans_delay_msecs;
int tg_pt_gp_pref;
int tg_pt_gp_write_metadata;
/* Used by struct t10_alua_tg_pt_gp->tg_pt_gp_md_buf_len */
#define ALUA_MD_BUF_LEN 1024
u32 tg_pt_gp_md_buf_len;
u32 tg_pt_gp_members;
atomic_t tg_pt_gp_alua_access_state;
atomic_t tg_pt_gp_ref_cnt;
spinlock_t tg_pt_gp_lock;
struct mutex tg_pt_gp_md_mutex;
struct se_subsystem_dev *tg_pt_gp_su_dev;
struct config_group tg_pt_gp_group;
struct list_head tg_pt_gp_list;
struct list_head tg_pt_gp_mem_list;
} ____cacheline_aligned;
struct t10_alua_tg_pt_gp_member {
int tg_pt_gp_assoc:1;
atomic_t tg_pt_gp_mem_ref_cnt;
spinlock_t tg_pt_gp_mem_lock;
struct t10_alua_tg_pt_gp *tg_pt_gp;
struct se_port *tg_pt;
struct list_head tg_pt_gp_mem_list;
} ____cacheline_aligned;
struct t10_vpd {
unsigned char device_identifier[INQUIRY_VPD_DEVICE_IDENTIFIER_LEN];
int protocol_identifier_set;
u32 protocol_identifier;
u32 device_identifier_code_set;
u32 association;
u32 device_identifier_type;
struct list_head vpd_list;
} ____cacheline_aligned;
struct t10_wwn {
unsigned char vendor[8];
unsigned char model[16];
unsigned char revision[4];
unsigned char unit_serial[INQUIRY_VPD_SERIAL_LEN];
spinlock_t t10_vpd_lock;
struct se_subsystem_dev *t10_sub_dev;
struct config_group t10_wwn_group;
struct list_head t10_vpd_list;
} ____cacheline_aligned;
/*
* Used by TCM Core internally to signal if >= SPC-3 peristent reservations
* emulation is enabled or disabled, or running in with TCM/pSCSI passthrough
* mode
*/
typedef enum {
SPC_PASSTHROUGH,
SPC2_RESERVATIONS,
SPC3_PERSISTENT_RESERVATIONS
} t10_reservations_index_t;
struct t10_pr_registration {
/* Used for fabrics that contain WWN+ISID */
#define PR_REG_ISID_LEN 16
/* PR_REG_ISID_LEN + ',i,0x' */
#define PR_REG_ISID_ID_LEN (PR_REG_ISID_LEN + 5)
char pr_reg_isid[PR_REG_ISID_LEN];
/* Used during APTPL metadata reading */
#define PR_APTPL_MAX_IPORT_LEN 256
unsigned char pr_iport[PR_APTPL_MAX_IPORT_LEN];
/* Used during APTPL metadata reading */
#define PR_APTPL_MAX_TPORT_LEN 256
unsigned char pr_tport[PR_APTPL_MAX_TPORT_LEN];
/* For writing out live meta data */
unsigned char *pr_aptpl_buf;
u16 pr_aptpl_rpti;
u16 pr_reg_tpgt;
/* Reservation effects all target ports */
int pr_reg_all_tg_pt;
/* Activate Persistence across Target Power Loss */
int pr_reg_aptpl;
int pr_res_holder;
int pr_res_type;
int pr_res_scope;
/* Used for fabric initiator WWPNs using a ISID */
int isid_present_at_reg:1;
u32 pr_res_mapped_lun;
u32 pr_aptpl_target_lun;
u32 pr_res_generation;
u64 pr_reg_bin_isid;
u64 pr_res_key;
atomic_t pr_res_holders;
struct se_node_acl *pr_reg_nacl;
struct se_dev_entry *pr_reg_deve;
struct se_lun *pr_reg_tg_pt_lun;
struct list_head pr_reg_list;
struct list_head pr_reg_abort_list;
struct list_head pr_reg_aptpl_list;
struct list_head pr_reg_atp_list;
struct list_head pr_reg_atp_mem_list;
} ____cacheline_aligned;
/*
* This set of function pointer ops is set based upon SPC3_PERSISTENT_RESERVATIONS,
* SPC2_RESERVATIONS or SPC_PASSTHROUGH in drivers/target/target_core_pr.c:
* core_setup_reservations()
*/
struct t10_reservation_ops {
int (*t10_reservation_check)(struct se_cmd *, u32 *);
int (*t10_seq_non_holder)(struct se_cmd *, unsigned char *, u32);
int (*t10_pr_register)(struct se_cmd *);
int (*t10_pr_clear)(struct se_cmd *);
};
struct t10_reservation_template {
/* Reservation effects all target ports */
int pr_all_tg_pt;
/* Activate Persistence across Target Power Loss enabled
* for SCSI device */
int pr_aptpl_active;
/* Used by struct t10_reservation_template->pr_aptpl_buf_len */
#define PR_APTPL_BUF_LEN 8192
u32 pr_aptpl_buf_len;
u32 pr_generation;
t10_reservations_index_t res_type;
spinlock_t registration_lock;
spinlock_t aptpl_reg_lock;
/*
* This will always be set by one individual I_T Nexus.
* However with all_tg_pt=1, other I_T Nexus from the
* same initiator can access PR reg/res info on a different
* target port.
*
* There is also the 'All Registrants' case, where there is
* a single *pr_res_holder of the reservation, but all
* registrations are considered reservation holders.
*/
struct se_node_acl *pr_res_holder;
struct list_head registration_list;
struct list_head aptpl_reg_list;
struct t10_reservation_ops pr_ops;
} ____cacheline_aligned;
struct se_queue_req {
int state;
void *cmd;
struct list_head qr_list;
} ____cacheline_aligned;
struct se_queue_obj {
atomic_t queue_cnt;
spinlock_t cmd_queue_lock;
struct list_head qobj_list;
wait_queue_head_t thread_wq;
} ____cacheline_aligned;
/*
* Used one per struct se_cmd to hold all extra struct se_task
* metadata. This structure is setup and allocated in
* drivers/target/target_core_transport.c:__transport_alloc_se_cmd()
*/
struct se_transport_task {
unsigned char *t_task_cdb;
unsigned char __t_task_cdb[TCM_MAX_COMMAND_SIZE];
unsigned long long t_task_lba;
int t_tasks_failed;
int t_tasks_fua;
int t_tasks_bidi:1;
u32 t_task_cdbs;
u32 t_tasks_check;
u32 t_tasks_no;
u32 t_tasks_sectors;
u32 t_tasks_se_num;
u32 t_tasks_se_bidi_num;
u32 t_tasks_sg_chained_no;
atomic_t t_fe_count;
atomic_t t_se_count;
atomic_t t_task_cdbs_left;
atomic_t t_task_cdbs_ex_left;
atomic_t t_task_cdbs_timeout_left;
atomic_t t_task_cdbs_sent;
atomic_t t_transport_aborted;
atomic_t t_transport_active;
atomic_t t_transport_complete;
atomic_t t_transport_queue_active;
atomic_t t_transport_sent;
atomic_t t_transport_stop;
atomic_t t_transport_timeout;
atomic_t transport_dev_active;
atomic_t transport_lun_active;
atomic_t transport_lun_fe_stop;
atomic_t transport_lun_stop;
spinlock_t t_state_lock;
struct completion t_transport_stop_comp;
struct completion transport_lun_fe_stop_comp;
struct completion transport_lun_stop_comp;
struct scatterlist *t_tasks_sg_chained;
struct scatterlist t_tasks_sg_bounce;
void *t_task_buf;
/*
* Used for pre-registered fabric SGL passthrough WRITE and READ
* with the special SCF_PASSTHROUGH_CONTIG_TO_SG case for TCM_Loop
* and other HW target mode fabric modules.
*/
struct scatterlist *t_task_pt_sgl;
struct list_head *t_mem_list;
/* Used for BIDI READ */
struct list_head *t_mem_bidi_list;
struct list_head t_task_list;
} ____cacheline_aligned;
struct se_task {
unsigned char task_sense;
struct scatterlist *task_sg;
struct scatterlist *task_sg_bidi;
u8 task_scsi_status;
u8 task_flags;
int task_error_status;
int task_state_flags;
int task_padded_sg:1;
unsigned long long task_lba;
u32 task_no;
u32 task_sectors;
u32 task_size;
u32 task_sg_num;
u32 task_sg_offset;
enum dma_data_direction task_data_direction;
struct se_cmd *task_se_cmd;
struct se_device *se_dev;
struct completion task_stop_comp;
atomic_t task_active;
atomic_t task_execute_queue;
atomic_t task_timeout;
atomic_t task_sent;
atomic_t task_stop;
atomic_t task_state_active;
struct timer_list task_timer;
struct se_device *se_obj_ptr;
struct list_head t_list;
struct list_head t_execute_list;
struct list_head t_state_list;
} ____cacheline_aligned;
#define TASK_CMD(task) ((struct se_cmd *)task->task_se_cmd)
#define TASK_DEV(task) ((struct se_device *)task->se_dev)
struct se_cmd {
/* SAM response code being sent to initiator */
u8 scsi_status;
u8 scsi_asc;
u8 scsi_ascq;
u8 scsi_sense_reason;
u16 scsi_sense_length;
/* Delay for ALUA Active/NonOptimized state access in milliseconds */
int alua_nonop_delay;
/* See include/linux/dma-mapping.h */
enum dma_data_direction data_direction;
/* For SAM Task Attribute */
int sam_task_attr;
/* Transport protocol dependent state, see transport_state_table */
enum transport_state_table t_state;
/* Transport protocol dependent state for out of order CmdSNs */
int deferred_t_state;
/* Transport specific error status */
int transport_error_status;
/* See se_cmd_flags_table */
u32 se_cmd_flags;
u32 se_ordered_id;
/* Total size in bytes associated with command */
u32 data_length;
/* SCSI Presented Data Transfer Length */
u32 cmd_spdtl;
u32 residual_count;
u32 orig_fe_lun;
/* Persistent Reservation key */
u64 pr_res_key;
atomic_t transport_sent;
/* Used for sense data */
void *sense_buffer;
struct list_head se_delayed_list;
struct list_head se_ordered_list;
struct list_head se_lun_list;
struct se_device *se_dev;
struct se_dev_entry *se_deve;
struct se_device *se_obj_ptr;
struct se_device *se_orig_obj_ptr;
struct se_lun *se_lun;
/* Only used for internal passthrough and legacy TCM fabric modules */
struct se_session *se_sess;
struct se_tmr_req *se_tmr_req;
/* t_task is setup to t_task_backstore in transport_init_se_cmd() */
struct se_transport_task *t_task;
struct se_transport_task t_task_backstore;
struct target_core_fabric_ops *se_tfo;
int (*transport_emulate_cdb)(struct se_cmd *);
void (*transport_split_cdb)(unsigned long long, u32 *, unsigned char *);
void (*transport_wait_for_tasks)(struct se_cmd *, int, int);
void (*transport_complete_callback)(struct se_cmd *);
} ____cacheline_aligned;
#define T_TASK(cmd) ((struct se_transport_task *)(cmd->t_task))
#define CMD_TFO(cmd) ((struct target_core_fabric_ops *)cmd->se_tfo)
struct se_tmr_req {
/* Task Management function to be preformed */
u8 function;
/* Task Management response to send */
u8 response;
int call_transport;
/* Reference to ITT that Task Mgmt should be preformed */
u32 ref_task_tag;
/* 64-bit encoded SAM LUN from $FABRIC_MOD TMR header */
u64 ref_task_lun;
void *fabric_tmr_ptr;
struct se_cmd *task_cmd;
struct se_cmd *ref_cmd;
struct se_device *tmr_dev;
struct se_lun *tmr_lun;
struct list_head tmr_list;
} ____cacheline_aligned;
struct se_ua {
u8 ua_asc;
u8 ua_ascq;
struct se_node_acl *ua_nacl;
struct list_head ua_dev_list;
struct list_head ua_nacl_list;
} ____cacheline_aligned;
struct se_node_acl {
char initiatorname[TRANSPORT_IQN_LEN];
/* Used to signal demo mode created ACL, disabled by default */
int dynamic_node_acl:1;
u32 queue_depth;
u32 acl_index;
u64 num_cmds;
u64 read_bytes;
u64 write_bytes;
spinlock_t stats_lock;
/* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
atomic_t acl_pr_ref_count;
/* Used for MIB access */
atomic_t mib_ref_count;
struct se_dev_entry *device_list;
struct se_session *nacl_sess;
struct se_portal_group *se_tpg;
spinlock_t device_list_lock;
spinlock_t nacl_sess_lock;
struct config_group acl_group;
struct config_group acl_attrib_group;
struct config_group acl_auth_group;
struct config_group acl_param_group;
struct config_group *acl_default_groups[4];
struct list_head acl_list;
struct list_head acl_sess_list;
} ____cacheline_aligned;
struct se_session {
/* Used for MIB access */
atomic_t mib_ref_count;
u64 sess_bin_isid;
struct se_node_acl *se_node_acl;
struct se_portal_group *se_tpg;
void *fabric_sess_ptr;
struct list_head sess_list;
struct list_head sess_acl_list;
} ____cacheline_aligned;
#define SE_SESS(cmd) ((struct se_session *)(cmd)->se_sess)
#define SE_NODE_ACL(sess) ((struct se_node_acl *)(sess)->se_node_acl)
struct se_device;
struct se_transform_info;
struct scatterlist;
struct se_lun_acl {
char initiatorname[TRANSPORT_IQN_LEN];
u32 mapped_lun;
struct se_node_acl *se_lun_nacl;
struct se_lun *se_lun;
struct list_head lacl_list;
struct config_group se_lun_group;
} ____cacheline_aligned;
struct se_dev_entry {
int def_pr_registered:1;
/* See transport_lunflags_table */
u32 lun_flags;
u32 deve_cmds;
u32 mapped_lun;
u32 average_bytes;
u32 last_byte_count;
u32 total_cmds;
u32 total_bytes;
u64 pr_res_key;
u64 creation_time;
u32 attach_count;
u64 read_bytes;
u64 write_bytes;
atomic_t ua_count;
/* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
atomic_t pr_ref_count;
struct se_lun_acl *se_lun_acl;
spinlock_t ua_lock;
struct se_lun *se_lun;
struct list_head alua_port_list;
struct list_head ua_list;
} ____cacheline_aligned;
struct se_dev_limits {
/* Max supported HW queue depth */
u32 hw_queue_depth;
/* Max supported virtual queue depth */
u32 queue_depth;
/* From include/linux/blkdev.h for the other HW/SW limits. */
struct queue_limits limits;
} ____cacheline_aligned;
struct se_dev_attrib {
int emulate_dpo;
int emulate_fua_write;
int emulate_fua_read;
int emulate_write_cache;
int emulate_ua_intlck_ctrl;
int emulate_tas;
int emulate_tpu;
int emulate_tpws;
int emulate_reservations;
int emulate_alua;
int enforce_pr_isids;
u32 hw_block_size;
u32 block_size;
u32 hw_max_sectors;
u32 max_sectors;
u32 optimal_sectors;
u32 hw_queue_depth;
u32 queue_depth;
u32 task_timeout;
u32 max_unmap_lba_count;
u32 max_unmap_block_desc_count;
u32 unmap_granularity;
u32 unmap_granularity_alignment;
struct se_subsystem_dev *da_sub_dev;
struct config_group da_group;
} ____cacheline_aligned;
struct se_subsystem_dev {
/* Used for struct se_subsystem_dev-->se_dev_alias, must be less than PAGE_SIZE */
#define SE_DEV_ALIAS_LEN 512
unsigned char se_dev_alias[SE_DEV_ALIAS_LEN];
/* Used for struct se_subsystem_dev->se_dev_udev_path[], must be less than PAGE_SIZE */
#define SE_UDEV_PATH_LEN 512
unsigned char se_dev_udev_path[SE_UDEV_PATH_LEN];
u32 su_dev_flags;
struct se_hba *se_dev_hba;
struct se_device *se_dev_ptr;
struct se_dev_attrib se_dev_attrib;
/* T10 Asymmetric Logical Unit Assignment for Target Ports */
struct t10_alua t10_alua;
/* T10 Inquiry and VPD WWN Information */
struct t10_wwn t10_wwn;
/* T10 SPC-2 + SPC-3 Reservations */
struct t10_reservation_template t10_reservation;
spinlock_t se_dev_lock;
void *se_dev_su_ptr;
struct list_head g_se_dev_list;
struct config_group se_dev_group;
/* For T10 Reservations */
struct config_group se_dev_pr_group;
} ____cacheline_aligned;
#define T10_ALUA(su_dev) (&(su_dev)->t10_alua)
#define T10_RES(su_dev) (&(su_dev)->t10_reservation)
#define T10_PR_OPS(su_dev) (&(su_dev)->t10_reservation.pr_ops)
struct se_device {
/* Set to 1 if thread is NOT sleeping on thread_sem */
u8 thread_active;
u8 dev_status_timer_flags;
/* RELATIVE TARGET PORT IDENTIFER Counter */
u16 dev_rpti_counter;
/* Used for SAM Task Attribute ordering */
u32 dev_cur_ordered_id;
u32 dev_flags;
u32 dev_port_count;
/* See transport_device_status_table */
u32 dev_status;
u32 dev_tcq_window_closed;
/* Physical device queue depth */
u32 queue_depth;
/* Used for SPC-2 reservations enforce of ISIDs */
u64 dev_res_bin_isid;
t10_task_attr_index_t dev_task_attr_type;
/* Pointer to transport specific device structure */
void *dev_ptr;
u32 dev_index;
u64 creation_time;
u32 num_resets;
u64 num_cmds;
u64 read_bytes;
u64 write_bytes;
spinlock_t stats_lock;
/* Active commands on this virtual SE device */
atomic_t active_cmds;
atomic_t simple_cmds;
atomic_t depth_left;
atomic_t dev_ordered_id;
atomic_t dev_tur_active;
atomic_t execute_tasks;
atomic_t dev_status_thr_count;
atomic_t dev_hoq_count;
atomic_t dev_ordered_sync;
struct se_obj dev_obj;
struct se_obj dev_access_obj;
struct se_obj dev_export_obj;
struct se_queue_obj *dev_queue_obj;
struct se_queue_obj *dev_status_queue_obj;
spinlock_t delayed_cmd_lock;
spinlock_t ordered_cmd_lock;
spinlock_t execute_task_lock;
spinlock_t state_task_lock;
spinlock_t dev_alua_lock;
spinlock_t dev_reservation_lock;
spinlock_t dev_state_lock;
spinlock_t dev_status_lock;
spinlock_t dev_status_thr_lock;
spinlock_t se_port_lock;
spinlock_t se_tmr_lock;
/* Used for legacy SPC-2 reservationsa */
struct se_node_acl *dev_reserved_node_acl;
/* Used for ALUA Logical Unit Group membership */
struct t10_alua_lu_gp_member *dev_alua_lu_gp_mem;
/* Used for SPC-3 Persistent Reservations */
struct t10_pr_registration *dev_pr_res_holder;
struct list_head dev_sep_list;
struct list_head dev_tmr_list;
struct timer_list dev_status_timer;
/* Pointer to descriptor for processing thread */
struct task_struct *process_thread;
pid_t process_thread_pid;
struct task_struct *dev_mgmt_thread;
struct list_head delayed_cmd_list;
struct list_head ordered_cmd_list;
struct list_head execute_task_list;
struct list_head state_task_list;
/* Pointer to associated SE HBA */
struct se_hba *se_hba;
struct se_subsystem_dev *se_sub_dev;
/* Pointer to template of function pointers for transport */
struct se_subsystem_api *transport;
/* Linked list for struct se_hba struct se_device list */
struct list_head dev_list;
/* Linked list for struct se_global->g_se_dev_list */
struct list_head g_se_dev_list;
} ____cacheline_aligned;
#define SE_DEV(cmd) ((struct se_device *)(cmd)->se_lun->lun_se_dev)
#define SU_DEV(dev) ((struct se_subsystem_dev *)(dev)->se_sub_dev)
#define DEV_ATTRIB(dev) (&(dev)->se_sub_dev->se_dev_attrib)
#define DEV_T10_WWN(dev) (&(dev)->se_sub_dev->t10_wwn)
struct se_hba {
u16 hba_tpgt;
u32 hba_id;
/* See hba_flags_table */
u32 hba_flags;
/* Virtual iSCSI devices attached. */
u32 dev_count;
u32 hba_index;
atomic_t dev_mib_access_count;
atomic_t load_balance_queue;
atomic_t left_queue_depth;
/* Maximum queue depth the HBA can handle. */
atomic_t max_queue_depth;
/* Pointer to transport specific host structure. */
void *hba_ptr;
/* Linked list for struct se_device */
struct list_head hba_dev_list;
struct list_head hba_list;
spinlock_t device_lock;
spinlock_t hba_queue_lock;
struct config_group hba_group;
struct mutex hba_access_mutex;
struct se_subsystem_api *transport;
} ____cacheline_aligned;
#define SE_HBA(d) ((struct se_hba *)(d)->se_hba)
struct se_lun {
/* See transport_lun_status_table */
enum transport_lun_status_table lun_status;
u32 lun_access;
u32 lun_flags;
u32 unpacked_lun;
atomic_t lun_acl_count;
spinlock_t lun_acl_lock;
spinlock_t lun_cmd_lock;
spinlock_t lun_sep_lock;
struct completion lun_shutdown_comp;
struct list_head lun_cmd_list;
struct list_head lun_acl_list;
struct se_device *lun_se_dev;
struct config_group lun_group;
struct se_port *lun_sep;
} ____cacheline_aligned;
#define SE_LUN(c) ((struct se_lun *)(c)->se_lun)
struct se_port {
/* RELATIVE TARGET PORT IDENTIFER */
u16 sep_rtpi;
int sep_tg_pt_secondary_stat;
int sep_tg_pt_secondary_write_md;
u32 sep_index;
struct scsi_port_stats sep_stats;
/* Used for ALUA Target Port Groups membership */
atomic_t sep_tg_pt_gp_active;
atomic_t sep_tg_pt_secondary_offline;
/* Used for PR ALL_TG_PT=1 */
atomic_t sep_tg_pt_ref_cnt;
spinlock_t sep_alua_lock;
struct mutex sep_tg_pt_md_mutex;
struct t10_alua_tg_pt_gp_member *sep_alua_tg_pt_gp_mem;
struct se_lun *sep_lun;
struct se_portal_group *sep_tpg;
struct list_head sep_alua_list;
struct list_head sep_list;
} ____cacheline_aligned;
struct se_tpg_np {
struct config_group tpg_np_group;
} ____cacheline_aligned;
struct se_portal_group {
/* Type of target portal group, see transport_tpg_type_table */
enum transport_tpg_type_table se_tpg_type;
/* Number of ACLed Initiator Nodes for this TPG */
u32 num_node_acls;
/* Used for PR SPEC_I_PT=1 and REGISTER_AND_MOVE */
atomic_t tpg_pr_ref_count;
/* Spinlock for adding/removing ACLed Nodes */
spinlock_t acl_node_lock;
/* Spinlock for adding/removing sessions */
spinlock_t session_lock;
spinlock_t tpg_lun_lock;
/* Pointer to $FABRIC_MOD portal group */
void *se_tpg_fabric_ptr;
struct list_head se_tpg_list;
/* linked list for initiator ACL list */
struct list_head acl_node_list;
struct se_lun *tpg_lun_list;
struct se_lun tpg_virt_lun0;
/* List of TCM sessions assoicated wth this TPG */
struct list_head tpg_sess_list;
/* Pointer to $FABRIC_MOD dependent code */
struct target_core_fabric_ops *se_tpg_tfo;
struct se_wwn *se_tpg_wwn;
struct config_group tpg_group;
struct config_group *tpg_default_groups[6];
struct config_group tpg_lun_group;
struct config_group tpg_np_group;
struct config_group tpg_acl_group;
struct config_group tpg_attrib_group;
struct config_group tpg_param_group;
} ____cacheline_aligned;
#define TPG_TFO(se_tpg) ((struct target_core_fabric_ops *)(se_tpg)->se_tpg_tfo)
struct se_wwn {
struct target_fabric_configfs *wwn_tf;
struct config_group wwn_group;
} ____cacheline_aligned;
struct se_global {
u16 alua_lu_gps_counter;
int g_sub_api_initialized;
u32 in_shutdown;
u32 alua_lu_gps_count;
u32 g_hba_id_counter;
struct config_group target_core_hbagroup;
struct config_group alua_group;
struct config_group alua_lu_gps_group;
struct list_head g_lu_gps_list;
struct list_head g_se_tpg_list;
struct list_head g_hba_list;
struct list_head g_se_dev_list;
struct se_hba *g_lun0_hba;
struct se_subsystem_dev *g_lun0_su_dev;
struct se_device *g_lun0_dev;
struct t10_alua_lu_gp *default_lu_gp;
spinlock_t g_device_lock;
spinlock_t hba_lock;
spinlock_t se_tpg_lock;
spinlock_t lu_gps_lock;
spinlock_t plugin_class_lock;
} ____cacheline_aligned;
#endif /* TARGET_CORE_BASE_H */

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#define TARGET_CORE_CONFIGFS_VERSION TARGET_CORE_MOD_VERSION
#define TARGET_CORE_CONFIG_ROOT "/sys/kernel/config"
#define TARGET_CORE_NAME_MAX_LEN 64
#define TARGET_FABRIC_NAME_SIZE 32
extern struct target_fabric_configfs *target_fabric_configfs_init(
struct module *, const char *);
extern void target_fabric_configfs_free(struct target_fabric_configfs *);
extern int target_fabric_configfs_register(struct target_fabric_configfs *);
extern void target_fabric_configfs_deregister(struct target_fabric_configfs *);
struct target_fabric_configfs_template {
struct config_item_type tfc_discovery_cit;
struct config_item_type tfc_wwn_cit;
struct config_item_type tfc_tpg_cit;
struct config_item_type tfc_tpg_base_cit;
struct config_item_type tfc_tpg_lun_cit;
struct config_item_type tfc_tpg_port_cit;
struct config_item_type tfc_tpg_np_cit;
struct config_item_type tfc_tpg_np_base_cit;
struct config_item_type tfc_tpg_attrib_cit;
struct config_item_type tfc_tpg_param_cit;
struct config_item_type tfc_tpg_nacl_cit;
struct config_item_type tfc_tpg_nacl_base_cit;
struct config_item_type tfc_tpg_nacl_attrib_cit;
struct config_item_type tfc_tpg_nacl_auth_cit;
struct config_item_type tfc_tpg_nacl_param_cit;
struct config_item_type tfc_tpg_mappedlun_cit;
};
struct target_fabric_configfs {
char tf_name[TARGET_FABRIC_NAME_SIZE];
atomic_t tf_access_cnt;
struct list_head tf_list;
struct config_group tf_group;
struct config_group tf_disc_group;
struct config_group *tf_default_groups[2];
/* Pointer to fabric's config_item */
struct config_item *tf_fabric;
/* Passed from fabric modules */
struct config_item_type *tf_fabric_cit;
/* Pointer to target core subsystem */
struct configfs_subsystem *tf_subsys;
/* Pointer to fabric's struct module */
struct module *tf_module;
struct target_core_fabric_ops tf_ops;
struct target_fabric_configfs_template tf_cit_tmpl;
};
#define TF_CIT_TMPL(tf) (&(tf)->tf_cit_tmpl)

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#ifndef TARGET_CORE_DEVICE_H
#define TARGET_CORE_DEVICE_H
extern int transport_get_lun_for_cmd(struct se_cmd *, unsigned char *, u32);
extern int transport_get_lun_for_tmr(struct se_cmd *, u32);
extern struct se_dev_entry *core_get_se_deve_from_rtpi(
struct se_node_acl *, u16);
extern int core_free_device_list_for_node(struct se_node_acl *,
struct se_portal_group *);
extern void core_dec_lacl_count(struct se_node_acl *, struct se_cmd *);
extern void core_update_device_list_access(u32, u32, struct se_node_acl *);
extern int core_update_device_list_for_node(struct se_lun *, struct se_lun_acl *, u32,
u32, struct se_node_acl *,
struct se_portal_group *, int);
extern void core_clear_lun_from_tpg(struct se_lun *, struct se_portal_group *);
extern int core_dev_export(struct se_device *, struct se_portal_group *,
struct se_lun *);
extern void core_dev_unexport(struct se_device *, struct se_portal_group *,
struct se_lun *);
extern int transport_core_report_lun_response(struct se_cmd *);
extern void se_release_device_for_hba(struct se_device *);
extern void se_release_vpd_for_dev(struct se_device *);
extern void se_clear_dev_ports(struct se_device *);
extern int se_free_virtual_device(struct se_device *, struct se_hba *);
extern int se_dev_check_online(struct se_device *);
extern int se_dev_check_shutdown(struct se_device *);
extern void se_dev_set_default_attribs(struct se_device *, struct se_dev_limits *);
extern int se_dev_set_task_timeout(struct se_device *, u32);
extern int se_dev_set_max_unmap_lba_count(struct se_device *, u32);
extern int se_dev_set_max_unmap_block_desc_count(struct se_device *, u32);
extern int se_dev_set_unmap_granularity(struct se_device *, u32);
extern int se_dev_set_unmap_granularity_alignment(struct se_device *, u32);
extern int se_dev_set_emulate_dpo(struct se_device *, int);
extern int se_dev_set_emulate_fua_write(struct se_device *, int);
extern int se_dev_set_emulate_fua_read(struct se_device *, int);
extern int se_dev_set_emulate_write_cache(struct se_device *, int);
extern int se_dev_set_emulate_ua_intlck_ctrl(struct se_device *, int);
extern int se_dev_set_emulate_tas(struct se_device *, int);
extern int se_dev_set_emulate_tpu(struct se_device *, int);
extern int se_dev_set_emulate_tpws(struct se_device *, int);
extern int se_dev_set_enforce_pr_isids(struct se_device *, int);
extern int se_dev_set_queue_depth(struct se_device *, u32);
extern int se_dev_set_max_sectors(struct se_device *, u32);
extern int se_dev_set_optimal_sectors(struct se_device *, u32);
extern int se_dev_set_block_size(struct se_device *, u32);
extern struct se_lun *core_dev_add_lun(struct se_portal_group *, struct se_hba *,
struct se_device *, u32);
extern int core_dev_del_lun(struct se_portal_group *, u32);
extern struct se_lun *core_get_lun_from_tpg(struct se_portal_group *, u32);
extern struct se_lun_acl *core_dev_init_initiator_node_lun_acl(struct se_portal_group *,
u32, char *, int *);
extern int core_dev_add_initiator_node_lun_acl(struct se_portal_group *,
struct se_lun_acl *, u32, u32);
extern int core_dev_del_initiator_node_lun_acl(struct se_portal_group *,
struct se_lun *, struct se_lun_acl *);
extern void core_dev_free_initiator_node_lun_acl(struct se_portal_group *,
struct se_lun_acl *lacl);
extern int core_dev_setup_virtual_lun0(void);
extern void core_dev_release_virtual_lun0(void);
#endif /* TARGET_CORE_DEVICE_H */

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/*
* Used for tfc_wwn_cit attributes
*/
#include <target/configfs_macros.h>
CONFIGFS_EATTR_STRUCT(target_fabric_nacl_attrib, se_node_acl);
#define TF_NACL_ATTRIB_ATTR(_fabric, _name, _mode) \
static struct target_fabric_nacl_attrib_attribute _fabric##_nacl_attrib_##_name = \
__CONFIGFS_EATTR(_name, _mode, \
_fabric##_nacl_attrib_show_##_name, \
_fabric##_nacl_attrib_store_##_name);
CONFIGFS_EATTR_STRUCT(target_fabric_nacl_auth, se_node_acl);
#define TF_NACL_AUTH_ATTR(_fabric, _name, _mode) \
static struct target_fabric_nacl_auth_attribute _fabric##_nacl_auth_##_name = \
__CONFIGFS_EATTR(_name, _mode, \
_fabric##_nacl_auth_show_##_name, \
_fabric##_nacl_auth_store_##_name);
#define TF_NACL_AUTH_ATTR_RO(_fabric, _name) \
static struct target_fabric_nacl_auth_attribute _fabric##_nacl_auth_##_name = \
__CONFIGFS_EATTR_RO(_name, \
_fabric##_nacl_auth_show_##_name);
CONFIGFS_EATTR_STRUCT(target_fabric_nacl_param, se_node_acl);
#define TF_NACL_PARAM_ATTR(_fabric, _name, _mode) \
static struct target_fabric_nacl_param_attribute _fabric##_nacl_param_##_name = \
__CONFIGFS_EATTR(_name, _mode, \
_fabric##_nacl_param_show_##_name, \
_fabric##_nacl_param_store_##_name);
#define TF_NACL_PARAM_ATTR_RO(_fabric, _name) \
static struct target_fabric_nacl_param_attribute _fabric##_nacl_param_##_name = \
__CONFIGFS_EATTR_RO(_name, \
_fabric##_nacl_param_show_##_name);
CONFIGFS_EATTR_STRUCT(target_fabric_nacl_base, se_node_acl);
#define TF_NACL_BASE_ATTR(_fabric, _name, _mode) \
static struct target_fabric_nacl_base_attribute _fabric##_nacl_##_name = \
__CONFIGFS_EATTR(_name, _mode, \
_fabric##_nacl_show_##_name, \
_fabric##_nacl_store_##_name);
#define TF_NACL_BASE_ATTR_RO(_fabric, _name) \
static struct target_fabric_nacl_base_attribute _fabric##_nacl_##_name = \
__CONFIGFS_EATTR_RO(_name, \
_fabric##_nacl_show_##_name);
CONFIGFS_EATTR_STRUCT(target_fabric_np_base, se_tpg_np);
#define TF_NP_BASE_ATTR(_fabric, _name, _mode) \
static struct target_fabric_np_base_attribute _fabric##_np_##_name = \
__CONFIGFS_EATTR(_name, _mode, \
_fabric##_np_show_##_name, \
_fabric##_np_store_##_name);
CONFIGFS_EATTR_STRUCT(target_fabric_tpg_attrib, se_portal_group);
#define TF_TPG_ATTRIB_ATTR(_fabric, _name, _mode) \
static struct target_fabric_tpg_attrib_attribute _fabric##_tpg_attrib_##_name = \
__CONFIGFS_EATTR(_name, _mode, \
_fabric##_tpg_attrib_show_##_name, \
_fabric##_tpg_attrib_store_##_name);
CONFIGFS_EATTR_STRUCT(target_fabric_tpg_param, se_portal_group);
#define TF_TPG_PARAM_ATTR(_fabric, _name, _mode) \
static struct target_fabric_tpg_param_attribute _fabric##_tpg_param_##_name = \
__CONFIGFS_EATTR(_name, _mode, \
_fabric##_tpg_param_show_##_name, \
_fabric##_tpg_param_store_##_name);
CONFIGFS_EATTR_STRUCT(target_fabric_tpg, se_portal_group);
#define TF_TPG_BASE_ATTR(_fabric, _name, _mode) \
static struct target_fabric_tpg_attribute _fabric##_tpg_##_name = \
__CONFIGFS_EATTR(_name, _mode, \
_fabric##_tpg_show_##_name, \
_fabric##_tpg_store_##_name);
CONFIGFS_EATTR_STRUCT(target_fabric_wwn, target_fabric_configfs);
#define TF_WWN_ATTR(_fabric, _name, _mode) \
static struct target_fabric_wwn_attribute _fabric##_wwn_##_name = \
__CONFIGFS_EATTR(_name, _mode, \
_fabric##_wwn_show_attr_##_name, \
_fabric##_wwn_store_attr_##_name);
#define TF_WWN_ATTR_RO(_fabric, _name) \
static struct target_fabric_wwn_attribute _fabric##_wwn_##_name = \
__CONFIGFS_EATTR_RO(_name, \
_fabric##_wwn_show_attr_##_name);
CONFIGFS_EATTR_STRUCT(target_fabric_discovery, target_fabric_configfs);
#define TF_DISC_ATTR(_fabric, _name, _mode) \
static struct target_fabric_discovery_attribute _fabric##_disc_##_name = \
__CONFIGFS_EATTR(_name, _mode, \
_fabric##_disc_show_##_name, \
_fabric##_disc_store_##_name);
#define TF_DISC_ATTR_RO(_fabric, _name) \
static struct target_fabric_discovery_attribute _fabric##_disc_##_name = \
__CONFIGFS_EATTR_RO(_name, \
_fabric##_disc_show_##_name);
extern int target_fabric_setup_cits(struct target_fabric_configfs *);

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#ifndef TARGET_CORE_FABRIC_LIB_H
#define TARGET_CORE_FABRIC_LIB_H
extern u8 sas_get_fabric_proto_ident(struct se_portal_group *);
extern u32 sas_get_pr_transport_id(struct se_portal_group *, struct se_node_acl *,
struct t10_pr_registration *, int *, unsigned char *);
extern u32 sas_get_pr_transport_id_len(struct se_portal_group *, struct se_node_acl *,
struct t10_pr_registration *, int *);
extern char *sas_parse_pr_out_transport_id(struct se_portal_group *,
const char *, u32 *, char **);
extern u8 fc_get_fabric_proto_ident(struct se_portal_group *);
extern u32 fc_get_pr_transport_id(struct se_portal_group *, struct se_node_acl *,
struct t10_pr_registration *, int *, unsigned char *);
extern u32 fc_get_pr_transport_id_len(struct se_portal_group *, struct se_node_acl *,
struct t10_pr_registration *, int *);
extern char *fc_parse_pr_out_transport_id(struct se_portal_group *,
const char *, u32 *, char **);
extern u8 iscsi_get_fabric_proto_ident(struct se_portal_group *);
extern u32 iscsi_get_pr_transport_id(struct se_portal_group *, struct se_node_acl *,
struct t10_pr_registration *, int *, unsigned char *);
extern u32 iscsi_get_pr_transport_id_len(struct se_portal_group *, struct se_node_acl *,
struct t10_pr_registration *, int *);
extern char *iscsi_parse_pr_out_transport_id(struct se_portal_group *,
const char *, u32 *, char **);
#endif /* TARGET_CORE_FABRIC_LIB_H */

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/* Defined in target_core_configfs.h */
struct target_fabric_configfs;
struct target_core_fabric_ops {
struct configfs_subsystem *tf_subsys;
/*
* Optional to signal struct se_task->task_sg[] padding entries
* for scatterlist chaining using transport_do_task_sg_link(),
* disabled by default
*/
int task_sg_chaining:1;
char *(*get_fabric_name)(void);
u8 (*get_fabric_proto_ident)(struct se_portal_group *);
char *(*tpg_get_wwn)(struct se_portal_group *);
u16 (*tpg_get_tag)(struct se_portal_group *);
u32 (*tpg_get_default_depth)(struct se_portal_group *);
u32 (*tpg_get_pr_transport_id)(struct se_portal_group *,
struct se_node_acl *,
struct t10_pr_registration *, int *,
unsigned char *);
u32 (*tpg_get_pr_transport_id_len)(struct se_portal_group *,
struct se_node_acl *,
struct t10_pr_registration *, int *);
char *(*tpg_parse_pr_out_transport_id)(struct se_portal_group *,
const char *, u32 *, char **);
int (*tpg_check_demo_mode)(struct se_portal_group *);
int (*tpg_check_demo_mode_cache)(struct se_portal_group *);
int (*tpg_check_demo_mode_write_protect)(struct se_portal_group *);
int (*tpg_check_prod_mode_write_protect)(struct se_portal_group *);
struct se_node_acl *(*tpg_alloc_fabric_acl)(
struct se_portal_group *);
void (*tpg_release_fabric_acl)(struct se_portal_group *,
struct se_node_acl *);
u32 (*tpg_get_inst_index)(struct se_portal_group *);
/*
* Optional function pointer for TCM to perform command map
* from TCM processing thread context, for those struct se_cmd
* initally allocated in interrupt context.
*/
int (*new_cmd_map)(struct se_cmd *);
/*
* Optional function pointer for TCM fabric modules that use
* Linux/NET sockets to allocate struct iovec array to struct se_cmd
*/
int (*alloc_cmd_iovecs)(struct se_cmd *);
/*
* Optional to release struct se_cmd and fabric dependent allocated
* I/O descriptor in transport_cmd_check_stop()
*/
void (*check_stop_free)(struct se_cmd *);
void (*release_cmd_to_pool)(struct se_cmd *);
void (*release_cmd_direct)(struct se_cmd *);
/*
* Called with spin_lock_bh(struct se_portal_group->session_lock held.
*/
int (*shutdown_session)(struct se_session *);
void (*close_session)(struct se_session *);
void (*stop_session)(struct se_session *, int, int);
void (*fall_back_to_erl0)(struct se_session *);
int (*sess_logged_in)(struct se_session *);
u32 (*sess_get_index)(struct se_session *);
/*
* Used only for SCSI fabrics that contain multi-value TransportIDs
* (like iSCSI). All other SCSI fabrics should set this to NULL.
*/
u32 (*sess_get_initiator_sid)(struct se_session *,
unsigned char *, u32);
int (*write_pending)(struct se_cmd *);
int (*write_pending_status)(struct se_cmd *);
void (*set_default_node_attributes)(struct se_node_acl *);
u32 (*get_task_tag)(struct se_cmd *);
int (*get_cmd_state)(struct se_cmd *);
void (*new_cmd_failure)(struct se_cmd *);
int (*queue_data_in)(struct se_cmd *);
int (*queue_status)(struct se_cmd *);
int (*queue_tm_rsp)(struct se_cmd *);
u16 (*set_fabric_sense_len)(struct se_cmd *, u32);
u16 (*get_fabric_sense_len)(void);
int (*is_state_remove)(struct se_cmd *);
u64 (*pack_lun)(unsigned int);
/*
* fabric module calls for target_core_fabric_configfs.c
*/
struct se_wwn *(*fabric_make_wwn)(struct target_fabric_configfs *,
struct config_group *, const char *);
void (*fabric_drop_wwn)(struct se_wwn *);
struct se_portal_group *(*fabric_make_tpg)(struct se_wwn *,
struct config_group *, const char *);
void (*fabric_drop_tpg)(struct se_portal_group *);
int (*fabric_post_link)(struct se_portal_group *,
struct se_lun *);
void (*fabric_pre_unlink)(struct se_portal_group *,
struct se_lun *);
struct se_tpg_np *(*fabric_make_np)(struct se_portal_group *,
struct config_group *, const char *);
void (*fabric_drop_np)(struct se_tpg_np *);
struct se_node_acl *(*fabric_make_nodeacl)(struct se_portal_group *,
struct config_group *, const char *);
void (*fabric_drop_nodeacl)(struct se_node_acl *);
};

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#ifndef TARGET_CORE_TMR_H
#define TARGET_CORE_TMR_H
/* task management function values */
#ifdef ABORT_TASK
#undef ABORT_TASK
#endif /* ABORT_TASK */
#define ABORT_TASK 1
#ifdef ABORT_TASK_SET
#undef ABORT_TASK_SET
#endif /* ABORT_TASK_SET */
#define ABORT_TASK_SET 2
#ifdef CLEAR_ACA
#undef CLEAR_ACA
#endif /* CLEAR_ACA */
#define CLEAR_ACA 3
#ifdef CLEAR_TASK_SET
#undef CLEAR_TASK_SET
#endif /* CLEAR_TASK_SET */
#define CLEAR_TASK_SET 4
#define LUN_RESET 5
#define TARGET_WARM_RESET 6
#define TARGET_COLD_RESET 7
#define TASK_REASSIGN 8
/* task management response values */
#define TMR_FUNCTION_COMPLETE 0
#define TMR_TASK_DOES_NOT_EXIST 1
#define TMR_LUN_DOES_NOT_EXIST 2
#define TMR_TASK_STILL_ALLEGIANT 3
#define TMR_TASK_FAILOVER_NOT_SUPPORTED 4
#define TMR_TASK_MGMT_FUNCTION_NOT_SUPPORTED 5
#define TMR_FUNCTION_AUTHORIZATION_FAILED 6
#define TMR_FUNCTION_REJECTED 255
extern struct kmem_cache *se_tmr_req_cache;
extern struct se_tmr_req *core_tmr_alloc_req(struct se_cmd *, void *, u8);
extern void core_tmr_release_req(struct se_tmr_req *);
extern int core_tmr_lun_reset(struct se_device *, struct se_tmr_req *,
struct list_head *, struct se_cmd *);
#endif /* TARGET_CORE_TMR_H */

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#ifndef TARGET_CORE_TPG_H
#define TARGET_CORE_TPG_H
extern struct se_node_acl *__core_tpg_get_initiator_node_acl(struct se_portal_group *tpg,
const char *);
extern struct se_node_acl *core_tpg_get_initiator_node_acl(struct se_portal_group *tpg,
unsigned char *);
extern void core_tpg_add_node_to_devs(struct se_node_acl *,
struct se_portal_group *);
extern struct se_node_acl *core_tpg_check_initiator_node_acl(
struct se_portal_group *,
unsigned char *);
extern void core_tpg_wait_for_nacl_pr_ref(struct se_node_acl *);
extern void core_tpg_wait_for_mib_ref(struct se_node_acl *);
extern void core_tpg_clear_object_luns(struct se_portal_group *);
extern struct se_node_acl *core_tpg_add_initiator_node_acl(
struct se_portal_group *,
struct se_node_acl *,
const char *, u32);
extern int core_tpg_del_initiator_node_acl(struct se_portal_group *,
struct se_node_acl *, int);
extern int core_tpg_set_initiator_node_queue_depth(struct se_portal_group *,
unsigned char *, u32, int);
extern int core_tpg_register(struct target_core_fabric_ops *,
struct se_wwn *,
struct se_portal_group *, void *,
int);
extern int core_tpg_deregister(struct se_portal_group *);
extern struct se_lun *core_tpg_pre_addlun(struct se_portal_group *, u32);
extern int core_tpg_post_addlun(struct se_portal_group *, struct se_lun *, u32,
void *);
extern struct se_lun *core_tpg_pre_dellun(struct se_portal_group *, u32, int *);
extern int core_tpg_post_dellun(struct se_portal_group *, struct se_lun *);
#endif /* TARGET_CORE_TPG_H */

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#ifndef TARGET_CORE_TRANSPORT_H
#define TARGET_CORE_TRANSPORT_H
#define TARGET_CORE_VERSION TARGET_CORE_MOD_VERSION
/* Attempts before moving from SHORT to LONG */
#define PYX_TRANSPORT_WINDOW_CLOSED_THRESHOLD 3
#define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_SHORT 3 /* In milliseconds */
#define PYX_TRANSPORT_WINDOW_CLOSED_WAIT_LONG 10 /* In milliseconds */
#define PYX_TRANSPORT_STATUS_INTERVAL 5 /* In seconds */
#define PYX_TRANSPORT_SENT_TO_TRANSPORT 0
#define PYX_TRANSPORT_WRITE_PENDING 1
#define PYX_TRANSPORT_UNKNOWN_SAM_OPCODE -1
#define PYX_TRANSPORT_HBA_QUEUE_FULL -2
#define PYX_TRANSPORT_REQ_TOO_MANY_SECTORS -3
#define PYX_TRANSPORT_OUT_OF_MEMORY_RESOURCES -4
#define PYX_TRANSPORT_INVALID_CDB_FIELD -5
#define PYX_TRANSPORT_INVALID_PARAMETER_LIST -6
#define PYX_TRANSPORT_LU_COMM_FAILURE -7
#define PYX_TRANSPORT_UNKNOWN_MODE_PAGE -8
#define PYX_TRANSPORT_WRITE_PROTECTED -9
#define PYX_TRANSPORT_TASK_TIMEOUT -10
#define PYX_TRANSPORT_RESERVATION_CONFLICT -11
#define PYX_TRANSPORT_ILLEGAL_REQUEST -12
#define PYX_TRANSPORT_USE_SENSE_REASON -13
#ifndef SAM_STAT_RESERVATION_CONFLICT
#define SAM_STAT_RESERVATION_CONFLICT 0x18
#endif
#define TRANSPORT_PLUGIN_FREE 0
#define TRANSPORT_PLUGIN_REGISTERED 1
#define TRANSPORT_PLUGIN_PHBA_PDEV 1
#define TRANSPORT_PLUGIN_VHBA_PDEV 2
#define TRANSPORT_PLUGIN_VHBA_VDEV 3
/* For SE OBJ Plugins, in seconds */
#define TRANSPORT_TIMEOUT_TUR 10
#define TRANSPORT_TIMEOUT_TYPE_DISK 60
#define TRANSPORT_TIMEOUT_TYPE_ROM 120
#define TRANSPORT_TIMEOUT_TYPE_TAPE 600
#define TRANSPORT_TIMEOUT_TYPE_OTHER 300
/* For se_task->task_state_flags */
#define TSF_EXCEPTION_CLEARED 0x01
/*
* struct se_subsystem_dev->su_dev_flags
*/
#define SDF_FIRMWARE_VPD_UNIT_SERIAL 0x00000001
#define SDF_EMULATED_VPD_UNIT_SERIAL 0x00000002
#define SDF_USING_UDEV_PATH 0x00000004
#define SDF_USING_ALIAS 0x00000008
/*
* struct se_device->dev_flags
*/
#define DF_READ_ONLY 0x00000001
#define DF_SPC2_RESERVATIONS 0x00000002
#define DF_SPC2_RESERVATIONS_WITH_ISID 0x00000004
/* struct se_dev_attrib sanity values */
/* 10 Minutes */
#define DA_TASK_TIMEOUT_MAX 600
/* Default max_unmap_lba_count */
#define DA_MAX_UNMAP_LBA_COUNT 0
/* Default max_unmap_block_desc_count */
#define DA_MAX_UNMAP_BLOCK_DESC_COUNT 0
/* Default unmap_granularity */
#define DA_UNMAP_GRANULARITY_DEFAULT 0
/* Default unmap_granularity_alignment */
#define DA_UNMAP_GRANULARITY_ALIGNMENT_DEFAULT 0
/* Emulation for Direct Page Out */
#define DA_EMULATE_DPO 0
/* Emulation for Forced Unit Access WRITEs */
#define DA_EMULATE_FUA_WRITE 1
/* Emulation for Forced Unit Access READs */
#define DA_EMULATE_FUA_READ 0
/* Emulation for WriteCache and SYNCHRONIZE_CACHE */
#define DA_EMULATE_WRITE_CACHE 0
/* Emulation for UNIT ATTENTION Interlock Control */
#define DA_EMULATE_UA_INTLLCK_CTRL 0
/* Emulation for TASK_ABORTED status (TAS) by default */
#define DA_EMULATE_TAS 1
/* Emulation for Thin Provisioning UNMAP using block/blk-lib.c:blkdev_issue_discard() */
#define DA_EMULATE_TPU 0
/*
* Emulation for Thin Provisioning WRITE_SAME w/ UNMAP=1 bit using
* block/blk-lib.c:blkdev_issue_discard()
*/
#define DA_EMULATE_TPWS 0
/* No Emulation for PSCSI by default */
#define DA_EMULATE_RESERVATIONS 0
/* No Emulation for PSCSI by default */
#define DA_EMULATE_ALUA 0
/* Enforce SCSI Initiator Port TransportID with 'ISID' for PR */
#define DA_ENFORCE_PR_ISIDS 1
#define DA_STATUS_MAX_SECTORS_MIN 16
#define DA_STATUS_MAX_SECTORS_MAX 8192
#define SE_MODE_PAGE_BUF 512
#define MOD_MAX_SECTORS(ms, bs) (ms % (PAGE_SIZE / bs))
struct se_mem;
struct se_subsystem_api;
extern int init_se_global(void);
extern void release_se_global(void);
extern void transport_init_queue_obj(struct se_queue_obj *);
extern int transport_subsystem_check_init(void);
extern int transport_subsystem_register(struct se_subsystem_api *);
extern void transport_subsystem_release(struct se_subsystem_api *);
extern void transport_load_plugins(void);
extern struct se_session *transport_init_session(void);
extern void __transport_register_session(struct se_portal_group *,
struct se_node_acl *,
struct se_session *, void *);
extern void transport_register_session(struct se_portal_group *,
struct se_node_acl *,
struct se_session *, void *);
extern void transport_free_session(struct se_session *);
extern void transport_deregister_session_configfs(struct se_session *);
extern void transport_deregister_session(struct se_session *);
extern void transport_cmd_finish_abort(struct se_cmd *, int);
extern void transport_cmd_finish_abort_tmr(struct se_cmd *);
extern void transport_complete_sync_cache(struct se_cmd *, int);
extern void transport_complete_task(struct se_task *, int);
extern void transport_add_task_to_execute_queue(struct se_task *,
struct se_task *,
struct se_device *);
unsigned char *transport_dump_cmd_direction(struct se_cmd *);
extern void transport_dump_dev_state(struct se_device *, char *, int *);
extern void transport_dump_dev_info(struct se_device *, struct se_lun *,
unsigned long long, char *, int *);
extern void transport_dump_vpd_proto_id(struct t10_vpd *,
unsigned char *, int);
extern void transport_set_vpd_proto_id(struct t10_vpd *, unsigned char *);
extern int transport_dump_vpd_assoc(struct t10_vpd *,
unsigned char *, int);
extern int transport_set_vpd_assoc(struct t10_vpd *, unsigned char *);
extern int transport_dump_vpd_ident_type(struct t10_vpd *,
unsigned char *, int);
extern int transport_set_vpd_ident_type(struct t10_vpd *, unsigned char *);
extern int transport_dump_vpd_ident(struct t10_vpd *,
unsigned char *, int);
extern int transport_set_vpd_ident(struct t10_vpd *, unsigned char *);
extern struct se_device *transport_add_device_to_core_hba(struct se_hba *,
struct se_subsystem_api *,
struct se_subsystem_dev *, u32,
void *, struct se_dev_limits *,
const char *, const char *);
extern void transport_device_setup_cmd(struct se_cmd *);
extern void transport_init_se_cmd(struct se_cmd *,
struct target_core_fabric_ops *,
struct se_session *, u32, int, int,
unsigned char *);
extern void transport_free_se_cmd(struct se_cmd *);
extern int transport_generic_allocate_tasks(struct se_cmd *, unsigned char *);
extern int transport_generic_handle_cdb(struct se_cmd *);
extern int transport_generic_handle_cdb_map(struct se_cmd *);
extern int transport_generic_handle_data(struct se_cmd *);
extern void transport_new_cmd_failure(struct se_cmd *);
extern int transport_generic_handle_tmr(struct se_cmd *);
extern void __transport_stop_task_timer(struct se_task *, unsigned long *);
extern unsigned char transport_asciihex_to_binaryhex(unsigned char val[2]);
extern int transport_generic_map_mem_to_cmd(struct se_cmd *cmd, struct scatterlist *, u32,
struct scatterlist *, u32);
extern int transport_clear_lun_from_sessions(struct se_lun *);
extern int transport_check_aborted_status(struct se_cmd *, int);
extern int transport_send_check_condition_and_sense(struct se_cmd *, u8, int);
extern void transport_send_task_abort(struct se_cmd *);
extern void transport_release_cmd_to_pool(struct se_cmd *);
extern void transport_generic_free_cmd(struct se_cmd *, int, int, int);
extern void transport_generic_wait_for_cmds(struct se_cmd *, int);
extern u32 transport_calc_sg_num(struct se_task *, struct se_mem *, u32);
extern int transport_map_mem_to_sg(struct se_task *, struct list_head *,
void *, struct se_mem *,
struct se_mem **, u32 *, u32 *);
extern void transport_do_task_sg_chain(struct se_cmd *);
extern void transport_generic_process_write(struct se_cmd *);
extern int transport_generic_do_tmr(struct se_cmd *);
/* From target_core_alua.c */
extern int core_alua_check_nonop_delay(struct se_cmd *);
/*
* Each se_transport_task_t can have N number of possible struct se_task's
* for the storage transport(s) to possibly execute.
* Used primarily for splitting up CDBs that exceed the physical storage
* HBA's maximum sector count per task.
*/
struct se_mem {
struct page *se_page;
u32 se_len;
u32 se_off;
struct list_head se_list;
} ____cacheline_aligned;
/*
* Each type of disk transport supported MUST have a template defined
* within its .h file.
*/
struct se_subsystem_api {
/*
* The Name. :-)
*/
char name[16];
/*
* Transport Type.
*/
u8 transport_type;
/*
* struct module for struct se_hba references
*/
struct module *owner;
/*
* Used for global se_subsystem_api list_head
*/
struct list_head sub_api_list;
/*
* For SCF_SCSI_NON_DATA_CDB
*/
int (*cdb_none)(struct se_task *);
/*
* For SCF_SCSI_CONTROL_NONSG_IO_CDB
*/
int (*map_task_non_SG)(struct se_task *);
/*
* For SCF_SCSI_DATA_SG_IO_CDB and SCF_SCSI_CONTROL_SG_IO_CDB
*/
int (*map_task_SG)(struct se_task *);
/*
* attach_hba():
*/
int (*attach_hba)(struct se_hba *, u32);
/*
* detach_hba():
*/
void (*detach_hba)(struct se_hba *);
/*
* pmode_hba(): Used for TCM/pSCSI subsystem plugin HBA ->
* Linux/SCSI struct Scsi_Host passthrough
*/
int (*pmode_enable_hba)(struct se_hba *, unsigned long);
/*
* allocate_virtdevice():
*/
void *(*allocate_virtdevice)(struct se_hba *, const char *);
/*
* create_virtdevice(): Only for Virtual HBAs
*/
struct se_device *(*create_virtdevice)(struct se_hba *,
struct se_subsystem_dev *, void *);
/*
* free_device():
*/
void (*free_device)(void *);
/*
* dpo_emulated():
*/
int (*dpo_emulated)(struct se_device *);
/*
* fua_write_emulated():
*/
int (*fua_write_emulated)(struct se_device *);
/*
* fua_read_emulated():
*/
int (*fua_read_emulated)(struct se_device *);
/*
* write_cache_emulated():
*/
int (*write_cache_emulated)(struct se_device *);
/*
* transport_complete():
*
* Use transport_generic_complete() for majority of DAS transport
* drivers. Provided out of convenience.
*/
int (*transport_complete)(struct se_task *task);
struct se_task *(*alloc_task)(struct se_cmd *);
/*
* do_task():
*/
int (*do_task)(struct se_task *);
/*
* Used by virtual subsystem plugins IBLOCK and FILEIO to emulate
* UNMAP and WRITE_SAME_* w/ UNMAP=1 <-> Linux/Block Discard
*/
int (*do_discard)(struct se_device *, sector_t, u32);
/*
* Used by virtual subsystem plugins IBLOCK and FILEIO to emulate
* SYNCHRONIZE_CACHE_* <-> Linux/Block blkdev_issue_flush()
*/
void (*do_sync_cache)(struct se_task *);
/*
* free_task():
*/
void (*free_task)(struct se_task *);
/*
* check_configfs_dev_params():
*/
ssize_t (*check_configfs_dev_params)(struct se_hba *, struct se_subsystem_dev *);
/*
* set_configfs_dev_params():
*/
ssize_t (*set_configfs_dev_params)(struct se_hba *, struct se_subsystem_dev *,
const char *, ssize_t);
/*
* show_configfs_dev_params():
*/
ssize_t (*show_configfs_dev_params)(struct se_hba *, struct se_subsystem_dev *,
char *);
/*
* get_cdb():
*/
unsigned char *(*get_cdb)(struct se_task *);
/*
* get_device_rev():
*/
u32 (*get_device_rev)(struct se_device *);
/*
* get_device_type():
*/
u32 (*get_device_type)(struct se_device *);
/*
* Get the sector_t from a subsystem backstore..
*/
sector_t (*get_blocks)(struct se_device *);
/*
* do_se_mem_map():
*/
int (*do_se_mem_map)(struct se_task *, struct list_head *, void *,
struct se_mem *, struct se_mem **, u32 *, u32 *);
/*
* get_sense_buffer():
*/
unsigned char *(*get_sense_buffer)(struct se_task *);
} ____cacheline_aligned;
#define TRANSPORT(dev) ((dev)->transport)
#define HBA_TRANSPORT(hba) ((hba)->transport)
extern struct se_global *se_global;
#endif /* TARGET_CORE_TRANSPORT_H */