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a9996d722b
linux/drivers/scsi
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Wenchao Hao a9996d722b scsi: scsi_debug: Add interface to manage error injection for a single device 
This new facility uses the debugfs pseudo file system which is typically
mounted under the /sys/kernel/debug directory and requires root permissions
to access.

The interface file is found at /sys/kernel/debug/scsi_debug/<h:c:t:l>/error
where <h:c:t:l> identifies the device (logical unit (LU)) to inject errors
on.

For the following description the ${error} environment variable is assumed
to be set to/sys/kernel/debug/scsi_debug/1:0:0:0/error where 1:0:0:0 is a
pseudo device (LU) owned by the scsi_debug driver. Rules are written to
${error} in the normal sysfs fashion (e.g. 'echo "0 -2 0x12" > ${error}').

More than one rule can be active on a device at a time and inactive rules
(i.e. those whose error count is 0) remain in the rule listing. The
existing rules can be read with 'cat ${error}' with oneline output for each
rule.

The interface format is line-by-line, each line is an error injection rule.
Each rule contains integers separated by spaces, the first three columns
correspond to "Error code", "Error count" and "SCSI command", other
columns depend on Error code.

General rule format:
  +--------+------+-------------------------------------------------------+
  | Column | Type | Description                                           |
  +--------+------+-------------------------------------------------------+
  |   1    |  u8  | Error code                                            |
  |        |      |  0: timeout SCSI command                              |
  |        |      |  1: fail queuecommand, make queuecommand return       |
  |        |      |     given value                                       |
  |        |      |  2: fail command, finish command with SCSI status,    |
  |        |      |     sense key and ASC/ASCQ values                     |
  |        |      |  3: make abort commands for specific command fail     |
  |        |      |  4: make reset lun for specific command fail          |
  +--------+------+-------------------------------------------------------+
  |   2    |  s32 | Error count                                           |
  |        |      |  0: this rule will be ignored                         |
  |        |      |  positive: the rule will always take effect           |
  |        |      |  negative: the rule takes effect n times where -n is  |
  |        |      |            the value given. Ignored after n times     |
  +--------+------+-------------------------------------------------------+
  |   3    |  x8  | SCSI command opcode, 0xff for all commands            |
  +--------+------+-------------------------------------------------------+
  |  ...   |  xxx | Error type specific fields                            |
  +--------+------+-------------------------------------------------------+

Notes:

 - When multiple error inject rules are added for the same SCSI command,
   the one with smaller error code will take effect (and the others will be
   ignored).

 - If the same error (i.e. same Error code and SCSI command) is added, the
   older one will be overwritten..

 - Currently, the basic types are (u8/u16/u32/u64/s8/s16/s32/s64) and the
   hexadecimal types (x8/x16/x32/x64).

 - Where a hexadecimal value is expected (e.g. Column 3: SCSI command
   opcode) the "0x" prefix is optional on the value (e.g. the INQUIRY
   opcode can be given as '0x12' or '12').

 - When the Error count is negative, reading ${error} will show that value
   incrementing, stopping when it gets to 0.

Acked-by: Douglas Gilbert <dgilbert@interlog.com>
Signed-off-by: Wenchao Hao <haowenchao2@huawei.com>
Link: https://lore.kernel.org/r/20231010092051.608007-3-haowenchao2@huawei.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2023-10-16 20:50:11 -04:00
..
aacraid Merge branch '6.5/scsi-fixes' into 6.6/scsi-staging 2023-08-30 20:56:24 -04:00
aic7xxx scsi: aic7xxx: Fix firmware build fatal error 2023-07-31 11:28:55 -04:00
aic94xx scsi: libsas: Delete sas_ata_task.retry_count 2023-08-21 17:50:59 -04:00
arcmsr scsi: arcmsr: Add __init and __exit for arcmsr_module_{init,exit}() 2023-08-21 16:27:10 -04:00
arm scsi: powertec: Declare SCSI host template const 2023-03-24 19:19:21 -04:00
be2iscsi scsi: be2iscsi: Add length check when parsing nlattrs 2023-07-25 21:49:32 -04:00
bfa scsi: bfa: Replace one-element array with flexible-array member in struct fc_rscn_pl_s 2023-08-21 17:13:56 -04:00
bnx2fc scsi: bnx2fc: Avoid using get_cpu() in bnx2fc_cmd_alloc() 2022-05-16 21:26:50 -04:00
bnx2i scsi: bnx2i: Replace all non-returning strlcpy with strscpy 2023-05-26 13:52:19 -07:00
csiostor scsi: csiostor: Remove unnecessary aer.h include 2023-03-09 22:00:38 -05:00
cxgbi Networking changes for 6.4. 2023-04-26 16:07:23 -07:00
cxlflash Driver core changes for 6.4-rc1 2023-04-27 11:53:57 -07:00
device_handler scsi: scsi_dh_alua: Fix memleak for 'qdata' in alua_activate() 2023-03-16 23:02:23 -04:00
elx scsi: elx: sli4: Remove code duplication 2023-08-21 17:13:56 -04:00
esas2r modules-6.4-rc1 2023-04-27 16:36:55 -07:00
fcoe scsi: fcoe: Fix potential deadlock on &fip->ctlr_lock 2023-08-21 17:13:56 -04:00
fnic scsi: fnic: Remove unused functions fnic_scsi_host_start/end_tag() 2023-08-30 21:11:40 -04:00
hisi_sas ata changes for 6.6 2023-09-05 12:37:28 -07:00
ibmvscsi scsi: ibmvscsi: Replace all non-returning strlcpy with strscpy 2023-05-26 13:52:18 -07:00
ibmvscsi_tgt scsi: ibmvscsit: Remove default fabric ops callouts 2023-03-16 23:36:36 -04:00
isci Merge patch series "libsas: Some tidy-up" 2023-08-24 21:06:16 -04:00
libfc scsi: libfc: Include the correct header 2022-12-01 03:03:36 +00:00
libsas SCSI misc on 20230909 2023-09-09 12:01:33 -07:00
lpfc Merge branch 'fixes' into misc 2023-09-02 08:25:19 +01:00
megaraid scsi: megaraid: Use pci_dev_id() to simplify the code 2023-08-21 16:47:44 -04:00
mpi3mr scsi: mpi3mr: Update driver version to 8.5.0.0.0 2023-08-07 21:41:48 -04:00
mpt3sas scsi: mpt3sas: Remove volatile qualifier 2023-08-30 21:39:06 -04:00
mvsas scsi: libsas: Delete sas_ssp_task.task_prio 2023-08-21 17:50:58 -04:00
pcmcia scsi: Add HAS_IOPORT dependencies 2023-05-31 19:59:26 -04:00
pm8001 Merge branch 'fixes' into misc 2023-09-02 08:25:19 +01:00
qedf Merge branch 'fixes' into misc 2023-09-02 08:25:19 +01:00
qedi Merge branch '6.5/scsi-fixes' into 6.6/scsi-staging 2023-08-30 20:56:24 -04:00
qla2xxx Merge branch 'fixes' into misc 2023-09-02 08:25:19 +01:00
qla4xxx scsi: qla4xxx: Add length check when parsing nlattrs 2023-07-25 21:51:04 -04:00
smartpqi Merge patch series "smartpqi updates" 2023-08-24 22:58:36 -04:00
snic scsi: snic: Fix double free in snic_tgt_create() 2023-08-24 22:30:32 -04:00
sym53c8xx_2 scsi: sym53c8xx: Replace all non-returning strlcpy() with strscpy() 2023-05-31 18:04:30 -04:00
.gitignore
3w-9xxx.c scsi: 3w-9xxx: Replace all non-returning strlcpy with strscpy 2023-05-26 13:52:19 -07:00
3w-9xxx.h
3w-sas.c scsi: 3w-sas: Declare SCSI host template const 2023-03-24 19:19:20 -04:00
3w-sas.h scsi: 3w-sas: Replace 1-element arrays with flexible array members 2023-01-12 00:09:52 -05:00
3w-xxxx.c scsi: 3w-xxxx: Add error handling for initialization failure in tw_probe() 2023-05-22 17:31:56 -04:00
3w-xxxx.h scsi: 3w-xxxx: Replace one-element array with flexible-array member 2022-09-25 13:06:00 -04:00
53c700_d.h_shipped
53c700.c scsi: 53c700: Check that command slot is not NULL 2023-07-31 14:38:17 -04:00
53c700.h
53c700.scr
a100u2w.c scsi: a100u2w: Declare SCSI host template const 2023-03-24 19:19:20 -04:00
a100u2w.h
a2091.c scsi: a2091: Declare SCSI host template const 2023-03-24 19:19:20 -04:00
a2091.h
a3000.c scsi: a3000: Declare SCSI host template const 2023-03-24 19:19:20 -04:00
a3000.h
a4000t.c
advansys.c scsi: advansys: Declare SCSI host template const 2023-03-24 19:19:20 -04:00
aha152x.c scsi: aha152x: Declare SCSI host template const 2023-03-24 19:19:20 -04:00
aha152x.h
aha1542.c scsi: aha1542: Declare SCSI host template const 2023-03-24 19:19:21 -04:00
aha1542.h
aha1740.c scsi: aha1740: Declare SCSI host template const 2023-03-24 19:19:21 -04:00
aha1740.h
am53c974.c scsi: esp_scsi: Declare SCSI host template const 2023-03-24 19:19:22 -04:00
atari_scsi.c scsi: NCR5380: Add SCp members to struct NCR5380_cmd 2022-02-22 21:11:03 -05:00
atp870u.c scsi: atp870u: Declare SCSI host template const 2023-03-24 19:19:21 -04:00
atp870u.h
BusLogic.c scsi: BusLogic: Declare SCSI host template const 2023-03-24 19:19:20 -04:00
BusLogic.h
bvme6000_scsi.c
ch.c scsi: replace the fmode_t argument to scsi_ioctl with a simple bool 2023-06-12 08:04:04 -06:00
constants.c
dc395x.c scsi: dc395x: Declare SCSI host template const 2023-03-24 19:19:21 -04:00
dc395x.h
dmx3191d.c scsi: dmx3191d: Declare SCSI host template const 2023-03-24 19:19:22 -04:00
esp_scsi.c scsi: esp_scsi: Declare SCSI host template const 2023-03-24 19:19:22 -04:00
esp_scsi.h scsi: esp_scsi: Declare SCSI host template const 2023-03-24 19:19:22 -04:00
fdomain_isa.c
fdomain_pci.c
fdomain.c scsi: fdomain: Declare SCSI host template const 2023-03-24 19:19:22 -04:00
fdomain.h
FlashPoint.c scsi: FlashPoint: Remove redundant variable bm_int_st 2022-08-01 19:52:03 -04:00
g_NCR5380.c scsi: NCR5380: Declare SCSI host template const 2023-03-24 19:19:22 -04:00
gvp11.c scsi: gvp11: Remove unused gvp11_setup() function 2023-08-21 16:37:11 -04:00
gvp11.h
hosts.c scsi: core: Use 32-bit hostnum in scsi_host_lookup() 2023-08-21 16:42:03 -04:00
hpsa_cmd.h
hpsa.c Merge patch series "Constify most SCSI host templates" 2023-03-24 20:13:03 -04:00
hpsa.h
hptiop.c overflow: Add struct_size_t() helper 2023-05-26 13:52:19 -07:00
hptiop.h scsi: hptiop: Replace one-element array with flexible-array member in struct hpt_iop_request_ioctl_command() 2022-09-25 13:04:17 -04:00
imm.c scsi: imm: Declare SCSI host template const 2023-03-24 19:19:56 -04:00
imm.h scsi: imm: Move the SCSI pointer to private command data 2022-02-22 21:11:04 -05:00
initio.c scsi: initio: Declare SCSI host template const 2023-03-24 19:19:56 -04:00
initio.h scsi: initio: Stop using the SCSI pointer 2022-02-22 21:11:05 -05:00
ipr.c scsi: ipr: Remove several unused variables 2023-04-24 23:11:47 -04:00
ipr.h scsi: ipr: Remove SATA support 2023-04-18 23:01:23 -04:00
ips.c scsi: ips: Replace kmap_atomic() with kmap_local_page() 2023-01-18 18:41:12 -05:00
ips.h
iscsi_boot_sysfs.c
iscsi_tcp.c scsi: iscsi_tcp: Use sendmsg(MSG_SPLICE_PAGES) rather than sendpage 2023-06-24 15:50:13 -07:00
iscsi_tcp.h scsi: iscsi_tcp: Use sendmsg(MSG_SPLICE_PAGES) rather than sendpage 2023-06-24 15:50:13 -07:00
jazz_esp.c scsi: esp_scsi: Declare SCSI host template const 2023-03-24 19:19:22 -04:00
Kconfig scsi: ppa: Add a module parameter for the transfer mode 2023-08-21 16:32:40 -04:00
lasi700.c
libiscsi_tcp.c scsi: iscsi: Remove iscsi_get_task back_lock requirement 2022-06-21 21:19:23 -04:00
libiscsi.c scsi: iscsi: Declare SCSI host template const 2023-03-24 19:19:57 -04:00
mac53c94.c scsi: mac53c94: Declare SCSI host template const 2023-03-24 19:19:57 -04:00
mac53c94.h scsi: mac53c94: Stop using struct scsi_pointer 2022-02-27 21:35:30 -05:00
mac_esp.c scsi: esp_scsi: Declare SCSI host template const 2023-03-24 19:19:22 -04:00
mac_scsi.c scsi: NCR5380: Add SCp members to struct NCR5380_cmd 2022-02-22 21:11:03 -05:00
Makefile scsi: dpt_i2o: Remove obsolete driver 2022-06-27 22:56:21 -04:00
megaraid.c scsi: megaraid: Fix mega_cmd_done() CMDID_INT_CMDS 2023-03-24 20:27:17 -04:00
megaraid.h scsi: megaraid: Stop using the SCSI pointer 2022-02-22 21:11:05 -05:00
mesh.c scsi: mesh: Declare SCSI host template const 2023-03-24 19:19:57 -04:00
mesh.h scsi: mesh: Stop using struct scsi_pointer 2022-02-27 21:34:02 -05:00
mvme16x_scsi.c
mvme147.c scsi: mvme147: Declare SCSI host template const 2023-03-24 19:19:57 -04:00
mvme147.h
mvumi.c scsi: core: Improve type safety of scsi_rescan_device() 2023-08-24 22:11:29 -04:00
mvumi.h scsi: mvumi: Replace 1-element arrays with flexible array members 2023-01-12 00:11:11 -05:00
myrb.c scsi: myrb: Declare SCSI host template const 2023-03-24 19:19:58 -04:00
myrb.h
myrs.c scsi: myrs: Declare SCSI host template const 2023-03-24 19:19:58 -04:00
myrs.h
ncr53c8xx.c scsi: ncr53c8xx: Replace strlcpy() with strscpy() 2023-06-21 21:13:00 -04:00
ncr53c8xx.h scsi: zalon: Stop using the SCSI pointer 2022-02-22 21:11:07 -05:00
NCR5380.c scsi: NCR5380: Use default @max_active for hostdata->work_q 2023-05-22 15:13:03 -10:00
NCR5380.h scsi: NCR5380: Add SCp members to struct NCR5380_cmd 2022-02-22 21:11:03 -05:00
nsp32_debug.c
nsp32_io.h
nsp32.c scsi: nsp32: Declare SCSI host template const 2023-03-24 19:19:58 -04:00
nsp32.h scsi: nsp32: Stop using the SCSI pointer 2022-02-22 21:11:06 -05:00
pmcraid.c scsi: pmcraid: Use pci_dev_id() to simplify the code 2023-08-21 17:13:56 -04:00
pmcraid.h scsi: pmcraid: Remove the PMCRAID_PASSTHROUGH_IOCTL ioctl implementation 2022-03-29 23:32:26 -04:00
ppa.c scsi: ppa: Add a module parameter for the transfer mode 2023-08-21 16:32:40 -04:00
ppa.h scsi: ppa: Add a module parameter for the transfer mode 2023-08-21 16:32:40 -04:00
ps3rom.c scsi: ps3rom: Declare SCSI host template const 2023-03-24 19:19:58 -04:00
qla1280.c scsi: qla1280: Declare SCSI host template const 2023-03-24 19:19:59 -04:00
qla1280.h scsi: qla1280: Move the SCSI pointer to private command data 2022-02-22 21:11:06 -05:00
qlogicfas408.c scsi: Remove drivers/scsi/scsi.h 2022-02-22 21:11:02 -05:00
qlogicfas408.h
qlogicfas.c scsi: Remove drivers/scsi/scsi.h 2022-02-22 21:11:02 -05:00
qlogicpti.c scsi: qlogicpti: Mark qlogicpti_info() static 2023-08-21 16:37:11 -04:00
qlogicpti.h
raid_class.c scsi: core: raid_class: Remove raid_component_add() 2023-08-24 21:34:28 -04:00
script_asm.pl
scsi_bsg.c scsi: replace the fmode_t argument to ->sg_io_fn with a simple bool 2023-06-12 08:04:04 -06:00
scsi_common.c scsi: core: Use min() instead of open-coding it 2023-05-31 11:05:34 -04:00
scsi_debug.c scsi: scsi_debug: Add interface to manage error injection for a single device 2023-10-16 20:50:11 -04:00
scsi_debugfs.c scsi: core: Report error list information in debugfs 2023-08-24 22:13:03 -04:00
scsi_debugfs.h
scsi_devinfo.c scsi: core: Add BLIST_SKIP_VPD_PAGES for SKhynix H28U74301AMR 2023-03-16 22:54:43 -04:00
scsi_dh.c
scsi_error.c scsi: sd: Handle read/write CDL timeout failures 2023-05-22 17:05:19 -04:00
scsi_ioctl.c scsi: replace the fmode_t argument to scsi_ioctl with a simple bool 2023-06-12 08:04:04 -06:00
scsi_lib_dma.c
scsi_lib.c SCSI misc on 20230909 2023-09-09 12:01:33 -07:00
scsi_logging.c scsi: core: scsi_logging: Fix a BUG 2022-03-29 23:29:19 -04:00
scsi_logging.h
scsi_netlink.c
scsi_pm.c scsi: block: pm: Always set request queue runtime active in blk_post_runtime_resume() 2021-12-22 23:38:29 -05:00
scsi_priv.h scsi: core: Improve type safety of scsi_rescan_device() 2023-08-24 22:11:29 -04:00
scsi_proc.c scsi: core: Fix legacy /proc parsing buffer overflow 2023-07-31 15:39:39 -04:00
scsi_sas_internal.h
scsi_scan.c scsi: core: Improve type safety of scsi_rescan_device() 2023-08-24 22:11:29 -04:00
scsi_sysctl.c scsi: simplify sysctl registration with register_sysctl() 2023-04-13 11:49:20 -07:00
scsi_sysfs.c scsi: core: Improve type safety of scsi_rescan_device() 2023-08-24 22:11:29 -04:00
scsi_trace.c
scsi_transport_api.h
scsi_transport_fc.c scsi: core: Replace scsi_target_block() with scsi_block_targets() 2023-06-16 12:19:59 -04:00
scsi_transport_iscsi.c scsi: iscsi: Add strlen() check in iscsi_if_set{_host}_param() 2023-07-25 21:48:13 -04:00
scsi_transport_sas.c scsi: core: Support retrieving sub-pages of mode pages 2023-05-22 17:05:19 -04:00
scsi_transport_spi.c scsi: spi: Convert to scsi_execute_cmd() 2023-01-13 21:34:09 -05:00
scsi_transport_srp.c scsi: core: Replace scsi_target_block() with scsi_block_targets() 2023-06-16 12:19:59 -04:00
scsi.c scsi: core: Simplify scsi_cdl_check_cmd() 2023-06-28 21:47:09 -04:00
scsicam.c scsicam: Fix use of page cache 2022-05-08 14:28:18 -04:00
sd_dif.c scsi: sd: Update DIX config every time sd_revalidate_disk() is called 2023-02-21 22:00:32 -05:00
sd_trace.h scsi: sd: sd_zbc: Trace zone append emulation 2022-12-01 03:13:55 +00:00
sd_zbc.c scsi: sd_zbc: Set zone limits before revalidating zones 2023-07-05 21:58:10 -04:00
sd.c SCSI misc on 20230909 2023-09-09 12:01:33 -07:00
sd.h scsi: sd: Revert "Rework asynchronous resume support" 2022-08-22 22:45:25 -04:00
sense_codes.h
ses.c Driver core changes for 6.4-rc1 2023-04-27 11:53:57 -07:00
sg.c scsi: sg: Fix checking return value of blk_get_queue() 2023-07-19 23:12:13 -04:00
sgiwd93.c scsi: sgiwd93: Declare SCSI host template const 2023-03-24 19:19:59 -04:00
sim710.c
sni_53c710.c
sr_ioctl.c scsi: sr: Convert to scsi_execute_cmd() 2023-01-13 21:34:09 -05:00
sr_vendor.c scsi: sr: Don't use GFP_DMA 2021-12-22 23:41:13 -05:00
sr.c SCSI misc on 20230629 2023-06-30 11:57:07 -07:00
sr.h sr: implement ->free_disk to simplify refcounting 2022-03-08 19:40:01 -07:00
st_options.h
st.c scsi: st: Add third party poweron reset handling 2023-08-24 22:16:28 -04:00
st.h scsi: don't use disk->private_data to find the scsi_driver 2022-03-08 19:40:00 -07:00
stex.c scsi: stex: Fix gcc 13 warnings 2023-05-31 11:36:40 -04:00
storvsc_drv.c Merge branch '6.5/scsi-fixes' into 6.6/scsi-staging 2023-08-30 20:56:24 -04:00
sun3_scsi_vme.c
sun3_scsi.c scsi: NCR5380: Add SCp members to struct NCR5380_cmd 2022-02-22 21:11:03 -05:00
sun3x_esp.c scsi: esp_scsi: Declare SCSI host template const 2023-03-24 19:19:22 -04:00
sun_esp.c scsi: sun_esp: Explicitly include correct DT includes 2023-07-23 15:49:41 -04:00
virtio_scsi.c scsi: core: Improve type safety of scsi_rescan_device() 2023-08-24 22:11:29 -04:00
vmw_pvscsi.c scsi: vmw_pvscsi: No need to clear memory after a dma_alloc_coherent() call 2022-04-06 23:01:54 -04:00
vmw_pvscsi.h scsi: vmw_pvscsi: Expand vcpuHint to 16 bits 2022-06-07 21:30:56 -04:00
wd33c93.c scsi: wd33c93: Remove dead code related to the long-gone config WD33C93_PIO 2022-09-25 13:29:53 -04:00
wd33c93.h scsi: wd33c93: Remove dead code related to the long-gone config WD33C93_PIO 2022-09-25 13:29:53 -04:00
wd719x.c scsi: wd719x: Declare SCSI host template const 2023-03-24 19:19:59 -04:00
wd719x.h scsi: wd719x: Stop using the SCSI pointer 2022-02-22 21:11:07 -05:00
xen-scsifront.c scsi: xen-scsifront: shost_priv() can never return NULL 2023-08-24 22:06:44 -04:00
zalon.c scsi: zalon: Stop using the SCSI pointer 2022-02-22 21:11:07 -05:00
zorro7xx.c scsi: zorro7xx: Fix a resource leak in zorro7xx_remove_one() 2022-03-30 00:05:42 -04:00
zorro_esp.c scsi: esp_scsi: Declare SCSI host template const 2023-03-24 19:19:22 -04:00