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3b9373e95a
This is the kernel part of the modification to extract the net params from the ibft sysfs to the iface struct used for the connection request upon sync_session in the open-iscsi util. Three new session sysfs params are defined: boot_root - holds the name of the /sys/firmware/ibft or iscsi_rootN boot_nic - holds the ethernetN name boot_target - holds the targetN name Signed-off-by: Eddie Wai <eddie.wai@broadcom.com> Reviewed-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <JBottomley@Parallels.com>
4045 lines
116 KiB
C
4045 lines
116 KiB
C
/*
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* iSCSI transport class definitions
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*
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* Copyright (C) IBM Corporation, 2004
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* Copyright (C) Mike Christie, 2004 - 2005
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* Copyright (C) Dmitry Yusupov, 2004 - 2005
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* Copyright (C) Alex Aizman, 2004 - 2005
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/slab.h>
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#include <linux/bsg-lib.h>
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#include <linux/idr.h>
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#include <linux/list.h>
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#include <net/tcp.h>
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#include <scsi/scsi.h>
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#include <scsi/scsi_host.h>
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#include <scsi/scsi_device.h>
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#include <scsi/scsi_transport.h>
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#include <scsi/scsi_transport_iscsi.h>
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#include <scsi/iscsi_if.h>
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#include <scsi/scsi_cmnd.h>
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#include <scsi/scsi_bsg_iscsi.h>
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#define ISCSI_TRANSPORT_VERSION "2.0-870"
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static int dbg_session;
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module_param_named(debug_session, dbg_session, int,
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S_IRUGO | S_IWUSR);
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MODULE_PARM_DESC(debug_session,
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"Turn on debugging for sessions in scsi_transport_iscsi "
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"module. Set to 1 to turn on, and zero to turn off. Default "
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"is off.");
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static int dbg_conn;
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module_param_named(debug_conn, dbg_conn, int,
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S_IRUGO | S_IWUSR);
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MODULE_PARM_DESC(debug_conn,
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"Turn on debugging for connections in scsi_transport_iscsi "
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"module. Set to 1 to turn on, and zero to turn off. Default "
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"is off.");
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#define ISCSI_DBG_TRANS_SESSION(_session, dbg_fmt, arg...) \
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do { \
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if (dbg_session) \
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iscsi_cls_session_printk(KERN_INFO, _session, \
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"%s: " dbg_fmt, \
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__func__, ##arg); \
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} while (0);
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#define ISCSI_DBG_TRANS_CONN(_conn, dbg_fmt, arg...) \
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do { \
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if (dbg_conn) \
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iscsi_cls_conn_printk(KERN_INFO, _conn, \
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"%s: " dbg_fmt, \
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__func__, ##arg); \
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} while (0);
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struct iscsi_internal {
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struct scsi_transport_template t;
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struct iscsi_transport *iscsi_transport;
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struct list_head list;
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struct device dev;
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struct transport_container conn_cont;
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struct transport_container session_cont;
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};
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static atomic_t iscsi_session_nr; /* sysfs session id for next new session */
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static struct workqueue_struct *iscsi_eh_timer_workq;
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static DEFINE_IDA(iscsi_sess_ida);
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/*
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* list of registered transports and lock that must
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* be held while accessing list. The iscsi_transport_lock must
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* be acquired after the rx_queue_mutex.
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*/
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static LIST_HEAD(iscsi_transports);
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static DEFINE_SPINLOCK(iscsi_transport_lock);
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#define to_iscsi_internal(tmpl) \
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container_of(tmpl, struct iscsi_internal, t)
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#define dev_to_iscsi_internal(_dev) \
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container_of(_dev, struct iscsi_internal, dev)
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static void iscsi_transport_release(struct device *dev)
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{
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struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
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kfree(priv);
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}
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/*
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* iscsi_transport_class represents the iscsi_transports that are
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* registered.
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*/
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static struct class iscsi_transport_class = {
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.name = "iscsi_transport",
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.dev_release = iscsi_transport_release,
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};
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static ssize_t
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show_transport_handle(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct iscsi_internal *priv = dev_to_iscsi_internal(dev);
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return sprintf(buf, "%llu\n", (unsigned long long)iscsi_handle(priv->iscsi_transport));
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}
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static DEVICE_ATTR(handle, S_IRUGO, show_transport_handle, NULL);
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#define show_transport_attr(name, format) \
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static ssize_t \
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show_transport_##name(struct device *dev, \
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struct device_attribute *attr,char *buf) \
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{ \
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struct iscsi_internal *priv = dev_to_iscsi_internal(dev); \
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return sprintf(buf, format"\n", priv->iscsi_transport->name); \
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} \
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static DEVICE_ATTR(name, S_IRUGO, show_transport_##name, NULL);
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show_transport_attr(caps, "0x%x");
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static struct attribute *iscsi_transport_attrs[] = {
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&dev_attr_handle.attr,
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&dev_attr_caps.attr,
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NULL,
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};
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static struct attribute_group iscsi_transport_group = {
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.attrs = iscsi_transport_attrs,
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};
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/*
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* iSCSI endpoint attrs
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*/
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#define iscsi_dev_to_endpoint(_dev) \
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container_of(_dev, struct iscsi_endpoint, dev)
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#define ISCSI_ATTR(_prefix,_name,_mode,_show,_store) \
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struct device_attribute dev_attr_##_prefix##_##_name = \
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__ATTR(_name,_mode,_show,_store)
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static void iscsi_endpoint_release(struct device *dev)
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{
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struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
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kfree(ep);
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}
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static struct class iscsi_endpoint_class = {
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.name = "iscsi_endpoint",
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.dev_release = iscsi_endpoint_release,
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};
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static ssize_t
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show_ep_handle(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
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return sprintf(buf, "%llu\n", (unsigned long long) ep->id);
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}
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static ISCSI_ATTR(ep, handle, S_IRUGO, show_ep_handle, NULL);
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static struct attribute *iscsi_endpoint_attrs[] = {
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&dev_attr_ep_handle.attr,
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NULL,
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};
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static struct attribute_group iscsi_endpoint_group = {
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.attrs = iscsi_endpoint_attrs,
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};
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#define ISCSI_MAX_EPID -1
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static int iscsi_match_epid(struct device *dev, const void *data)
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{
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struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
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const uint64_t *epid = data;
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return *epid == ep->id;
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}
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struct iscsi_endpoint *
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iscsi_create_endpoint(int dd_size)
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{
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struct device *dev;
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struct iscsi_endpoint *ep;
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uint64_t id;
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int err;
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for (id = 1; id < ISCSI_MAX_EPID; id++) {
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dev = class_find_device(&iscsi_endpoint_class, NULL, &id,
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iscsi_match_epid);
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if (!dev)
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break;
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}
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if (id == ISCSI_MAX_EPID) {
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printk(KERN_ERR "Too many connections. Max supported %u\n",
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ISCSI_MAX_EPID - 1);
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return NULL;
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}
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ep = kzalloc(sizeof(*ep) + dd_size, GFP_KERNEL);
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if (!ep)
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return NULL;
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ep->id = id;
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ep->dev.class = &iscsi_endpoint_class;
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dev_set_name(&ep->dev, "ep-%llu", (unsigned long long) id);
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err = device_register(&ep->dev);
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if (err)
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goto free_ep;
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err = sysfs_create_group(&ep->dev.kobj, &iscsi_endpoint_group);
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if (err)
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goto unregister_dev;
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if (dd_size)
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ep->dd_data = &ep[1];
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return ep;
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unregister_dev:
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device_unregister(&ep->dev);
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return NULL;
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free_ep:
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kfree(ep);
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return NULL;
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}
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EXPORT_SYMBOL_GPL(iscsi_create_endpoint);
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void iscsi_destroy_endpoint(struct iscsi_endpoint *ep)
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{
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sysfs_remove_group(&ep->dev.kobj, &iscsi_endpoint_group);
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device_unregister(&ep->dev);
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}
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EXPORT_SYMBOL_GPL(iscsi_destroy_endpoint);
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struct iscsi_endpoint *iscsi_lookup_endpoint(u64 handle)
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{
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struct iscsi_endpoint *ep;
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struct device *dev;
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dev = class_find_device(&iscsi_endpoint_class, NULL, &handle,
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iscsi_match_epid);
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if (!dev)
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return NULL;
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ep = iscsi_dev_to_endpoint(dev);
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/*
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* we can drop this now because the interface will prevent
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* removals and lookups from racing.
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*/
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put_device(dev);
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return ep;
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}
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EXPORT_SYMBOL_GPL(iscsi_lookup_endpoint);
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/*
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* Interface to display network param to sysfs
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*/
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static void iscsi_iface_release(struct device *dev)
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{
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struct iscsi_iface *iface = iscsi_dev_to_iface(dev);
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struct device *parent = iface->dev.parent;
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kfree(iface);
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put_device(parent);
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}
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static struct class iscsi_iface_class = {
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.name = "iscsi_iface",
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.dev_release = iscsi_iface_release,
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};
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#define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store) \
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struct device_attribute dev_attr_##_prefix##_##_name = \
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__ATTR(_name, _mode, _show, _store)
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/* iface attrs show */
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#define iscsi_iface_attr_show(type, name, param_type, param) \
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static ssize_t \
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show_##type##_##name(struct device *dev, struct device_attribute *attr, \
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char *buf) \
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{ \
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struct iscsi_iface *iface = iscsi_dev_to_iface(dev); \
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struct iscsi_transport *t = iface->transport; \
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return t->get_iface_param(iface, param_type, param, buf); \
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} \
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#define iscsi_iface_net_attr(type, name, param) \
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iscsi_iface_attr_show(type, name, ISCSI_NET_PARAM, param) \
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static ISCSI_IFACE_ATTR(type, name, S_IRUGO, show_##type##_##name, NULL);
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/* generic read only ipvi4 attribute */
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iscsi_iface_net_attr(ipv4_iface, ipaddress, ISCSI_NET_PARAM_IPV4_ADDR);
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iscsi_iface_net_attr(ipv4_iface, gateway, ISCSI_NET_PARAM_IPV4_GW);
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iscsi_iface_net_attr(ipv4_iface, subnet, ISCSI_NET_PARAM_IPV4_SUBNET);
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iscsi_iface_net_attr(ipv4_iface, bootproto, ISCSI_NET_PARAM_IPV4_BOOTPROTO);
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/* generic read only ipv6 attribute */
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iscsi_iface_net_attr(ipv6_iface, ipaddress, ISCSI_NET_PARAM_IPV6_ADDR);
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iscsi_iface_net_attr(ipv6_iface, link_local_addr, ISCSI_NET_PARAM_IPV6_LINKLOCAL);
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iscsi_iface_net_attr(ipv6_iface, router_addr, ISCSI_NET_PARAM_IPV6_ROUTER);
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iscsi_iface_net_attr(ipv6_iface, ipaddr_autocfg,
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ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG);
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iscsi_iface_net_attr(ipv6_iface, link_local_autocfg,
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ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG);
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/* common read only iface attribute */
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iscsi_iface_net_attr(iface, enabled, ISCSI_NET_PARAM_IFACE_ENABLE);
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iscsi_iface_net_attr(iface, vlan_id, ISCSI_NET_PARAM_VLAN_ID);
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iscsi_iface_net_attr(iface, vlan_priority, ISCSI_NET_PARAM_VLAN_PRIORITY);
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iscsi_iface_net_attr(iface, vlan_enabled, ISCSI_NET_PARAM_VLAN_ENABLED);
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iscsi_iface_net_attr(iface, mtu, ISCSI_NET_PARAM_MTU);
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iscsi_iface_net_attr(iface, port, ISCSI_NET_PARAM_PORT);
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static umode_t iscsi_iface_attr_is_visible(struct kobject *kobj,
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struct attribute *attr, int i)
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{
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struct device *dev = container_of(kobj, struct device, kobj);
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struct iscsi_iface *iface = iscsi_dev_to_iface(dev);
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struct iscsi_transport *t = iface->transport;
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int param;
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if (attr == &dev_attr_iface_enabled.attr)
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param = ISCSI_NET_PARAM_IFACE_ENABLE;
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else if (attr == &dev_attr_iface_vlan_id.attr)
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param = ISCSI_NET_PARAM_VLAN_ID;
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else if (attr == &dev_attr_iface_vlan_priority.attr)
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param = ISCSI_NET_PARAM_VLAN_PRIORITY;
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else if (attr == &dev_attr_iface_vlan_enabled.attr)
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param = ISCSI_NET_PARAM_VLAN_ENABLED;
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else if (attr == &dev_attr_iface_mtu.attr)
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param = ISCSI_NET_PARAM_MTU;
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else if (attr == &dev_attr_iface_port.attr)
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param = ISCSI_NET_PARAM_PORT;
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else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV4) {
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if (attr == &dev_attr_ipv4_iface_ipaddress.attr)
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param = ISCSI_NET_PARAM_IPV4_ADDR;
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else if (attr == &dev_attr_ipv4_iface_gateway.attr)
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param = ISCSI_NET_PARAM_IPV4_GW;
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else if (attr == &dev_attr_ipv4_iface_subnet.attr)
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param = ISCSI_NET_PARAM_IPV4_SUBNET;
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else if (attr == &dev_attr_ipv4_iface_bootproto.attr)
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param = ISCSI_NET_PARAM_IPV4_BOOTPROTO;
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else
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return 0;
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} else if (iface->iface_type == ISCSI_IFACE_TYPE_IPV6) {
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if (attr == &dev_attr_ipv6_iface_ipaddress.attr)
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param = ISCSI_NET_PARAM_IPV6_ADDR;
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else if (attr == &dev_attr_ipv6_iface_link_local_addr.attr)
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param = ISCSI_NET_PARAM_IPV6_LINKLOCAL;
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else if (attr == &dev_attr_ipv6_iface_router_addr.attr)
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param = ISCSI_NET_PARAM_IPV6_ROUTER;
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else if (attr == &dev_attr_ipv6_iface_ipaddr_autocfg.attr)
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param = ISCSI_NET_PARAM_IPV6_ADDR_AUTOCFG;
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else if (attr == &dev_attr_ipv6_iface_link_local_autocfg.attr)
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param = ISCSI_NET_PARAM_IPV6_LINKLOCAL_AUTOCFG;
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else
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return 0;
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} else {
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WARN_ONCE(1, "Invalid iface attr");
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return 0;
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}
|
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|
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return t->attr_is_visible(ISCSI_NET_PARAM, param);
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}
|
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|
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static struct attribute *iscsi_iface_attrs[] = {
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&dev_attr_iface_enabled.attr,
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&dev_attr_iface_vlan_id.attr,
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&dev_attr_iface_vlan_priority.attr,
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&dev_attr_iface_vlan_enabled.attr,
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&dev_attr_ipv4_iface_ipaddress.attr,
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&dev_attr_ipv4_iface_gateway.attr,
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&dev_attr_ipv4_iface_subnet.attr,
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&dev_attr_ipv4_iface_bootproto.attr,
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&dev_attr_ipv6_iface_ipaddress.attr,
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&dev_attr_ipv6_iface_link_local_addr.attr,
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&dev_attr_ipv6_iface_router_addr.attr,
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&dev_attr_ipv6_iface_ipaddr_autocfg.attr,
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&dev_attr_ipv6_iface_link_local_autocfg.attr,
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&dev_attr_iface_mtu.attr,
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&dev_attr_iface_port.attr,
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NULL,
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};
|
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|
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static struct attribute_group iscsi_iface_group = {
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.attrs = iscsi_iface_attrs,
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.is_visible = iscsi_iface_attr_is_visible,
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};
|
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|
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struct iscsi_iface *
|
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iscsi_create_iface(struct Scsi_Host *shost, struct iscsi_transport *transport,
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uint32_t iface_type, uint32_t iface_num, int dd_size)
|
|
{
|
|
struct iscsi_iface *iface;
|
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int err;
|
|
|
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iface = kzalloc(sizeof(*iface) + dd_size, GFP_KERNEL);
|
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if (!iface)
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return NULL;
|
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|
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iface->transport = transport;
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iface->iface_type = iface_type;
|
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iface->iface_num = iface_num;
|
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iface->dev.release = iscsi_iface_release;
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iface->dev.class = &iscsi_iface_class;
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/* parent reference released in iscsi_iface_release */
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iface->dev.parent = get_device(&shost->shost_gendev);
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if (iface_type == ISCSI_IFACE_TYPE_IPV4)
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dev_set_name(&iface->dev, "ipv4-iface-%u-%u", shost->host_no,
|
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iface_num);
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else
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dev_set_name(&iface->dev, "ipv6-iface-%u-%u", shost->host_no,
|
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iface_num);
|
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|
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err = device_register(&iface->dev);
|
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if (err)
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goto free_iface;
|
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|
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err = sysfs_create_group(&iface->dev.kobj, &iscsi_iface_group);
|
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if (err)
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goto unreg_iface;
|
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|
|
if (dd_size)
|
|
iface->dd_data = &iface[1];
|
|
return iface;
|
|
|
|
unreg_iface:
|
|
device_unregister(&iface->dev);
|
|
return NULL;
|
|
|
|
free_iface:
|
|
put_device(iface->dev.parent);
|
|
kfree(iface);
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL_GPL(iscsi_create_iface);
|
|
|
|
void iscsi_destroy_iface(struct iscsi_iface *iface)
|
|
{
|
|
sysfs_remove_group(&iface->dev.kobj, &iscsi_iface_group);
|
|
device_unregister(&iface->dev);
|
|
}
|
|
EXPORT_SYMBOL_GPL(iscsi_destroy_iface);
|
|
|
|
/*
|
|
* Interface to display flash node params to sysfs
|
|
*/
|
|
|
|
#define ISCSI_FLASHNODE_ATTR(_prefix, _name, _mode, _show, _store) \
|
|
struct device_attribute dev_attr_##_prefix##_##_name = \
|
|
__ATTR(_name, _mode, _show, _store)
|
|
|
|
/* flash node session attrs show */
|
|
#define iscsi_flashnode_sess_attr_show(type, name, param) \
|
|
static ssize_t \
|
|
show_##type##_##name(struct device *dev, struct device_attribute *attr, \
|
|
char *buf) \
|
|
{ \
|
|
struct iscsi_bus_flash_session *fnode_sess = \
|
|
iscsi_dev_to_flash_session(dev);\
|
|
struct iscsi_transport *t = fnode_sess->transport; \
|
|
return t->get_flashnode_param(fnode_sess, param, buf); \
|
|
} \
|
|
|
|
|
|
#define iscsi_flashnode_sess_attr(type, name, param) \
|
|
iscsi_flashnode_sess_attr_show(type, name, param) \
|
|
static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \
|
|
show_##type##_##name, NULL);
|
|
|
|
/* Flash node session attributes */
|
|
|
|
iscsi_flashnode_sess_attr(fnode, auto_snd_tgt_disable,
|
|
ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE);
|
|
iscsi_flashnode_sess_attr(fnode, discovery_session,
|
|
ISCSI_FLASHNODE_DISCOVERY_SESS);
|
|
iscsi_flashnode_sess_attr(fnode, portal_type, ISCSI_FLASHNODE_PORTAL_TYPE);
|
|
iscsi_flashnode_sess_attr(fnode, entry_enable, ISCSI_FLASHNODE_ENTRY_EN);
|
|
iscsi_flashnode_sess_attr(fnode, immediate_data, ISCSI_FLASHNODE_IMM_DATA_EN);
|
|
iscsi_flashnode_sess_attr(fnode, initial_r2t, ISCSI_FLASHNODE_INITIAL_R2T_EN);
|
|
iscsi_flashnode_sess_attr(fnode, data_seq_in_order,
|
|
ISCSI_FLASHNODE_DATASEQ_INORDER);
|
|
iscsi_flashnode_sess_attr(fnode, data_pdu_in_order,
|
|
ISCSI_FLASHNODE_PDU_INORDER);
|
|
iscsi_flashnode_sess_attr(fnode, chap_auth, ISCSI_FLASHNODE_CHAP_AUTH_EN);
|
|
iscsi_flashnode_sess_attr(fnode, discovery_logout,
|
|
ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN);
|
|
iscsi_flashnode_sess_attr(fnode, bidi_chap, ISCSI_FLASHNODE_BIDI_CHAP_EN);
|
|
iscsi_flashnode_sess_attr(fnode, discovery_auth_optional,
|
|
ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL);
|
|
iscsi_flashnode_sess_attr(fnode, erl, ISCSI_FLASHNODE_ERL);
|
|
iscsi_flashnode_sess_attr(fnode, first_burst_len, ISCSI_FLASHNODE_FIRST_BURST);
|
|
iscsi_flashnode_sess_attr(fnode, def_time2wait, ISCSI_FLASHNODE_DEF_TIME2WAIT);
|
|
iscsi_flashnode_sess_attr(fnode, def_time2retain,
|
|
ISCSI_FLASHNODE_DEF_TIME2RETAIN);
|
|
iscsi_flashnode_sess_attr(fnode, max_outstanding_r2t, ISCSI_FLASHNODE_MAX_R2T);
|
|
iscsi_flashnode_sess_attr(fnode, isid, ISCSI_FLASHNODE_ISID);
|
|
iscsi_flashnode_sess_attr(fnode, tsid, ISCSI_FLASHNODE_TSID);
|
|
iscsi_flashnode_sess_attr(fnode, max_burst_len, ISCSI_FLASHNODE_MAX_BURST);
|
|
iscsi_flashnode_sess_attr(fnode, def_taskmgmt_tmo,
|
|
ISCSI_FLASHNODE_DEF_TASKMGMT_TMO);
|
|
iscsi_flashnode_sess_attr(fnode, targetalias, ISCSI_FLASHNODE_ALIAS);
|
|
iscsi_flashnode_sess_attr(fnode, targetname, ISCSI_FLASHNODE_NAME);
|
|
iscsi_flashnode_sess_attr(fnode, tpgt, ISCSI_FLASHNODE_TPGT);
|
|
iscsi_flashnode_sess_attr(fnode, discovery_parent_idx,
|
|
ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX);
|
|
iscsi_flashnode_sess_attr(fnode, discovery_parent_type,
|
|
ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE);
|
|
iscsi_flashnode_sess_attr(fnode, chap_in_idx, ISCSI_FLASHNODE_CHAP_IN_IDX);
|
|
iscsi_flashnode_sess_attr(fnode, chap_out_idx, ISCSI_FLASHNODE_CHAP_OUT_IDX);
|
|
iscsi_flashnode_sess_attr(fnode, username, ISCSI_FLASHNODE_USERNAME);
|
|
iscsi_flashnode_sess_attr(fnode, username_in, ISCSI_FLASHNODE_USERNAME_IN);
|
|
iscsi_flashnode_sess_attr(fnode, password, ISCSI_FLASHNODE_PASSWORD);
|
|
iscsi_flashnode_sess_attr(fnode, password_in, ISCSI_FLASHNODE_PASSWORD_IN);
|
|
iscsi_flashnode_sess_attr(fnode, is_boot_target, ISCSI_FLASHNODE_IS_BOOT_TGT);
|
|
|
|
static struct attribute *iscsi_flashnode_sess_attrs[] = {
|
|
&dev_attr_fnode_auto_snd_tgt_disable.attr,
|
|
&dev_attr_fnode_discovery_session.attr,
|
|
&dev_attr_fnode_portal_type.attr,
|
|
&dev_attr_fnode_entry_enable.attr,
|
|
&dev_attr_fnode_immediate_data.attr,
|
|
&dev_attr_fnode_initial_r2t.attr,
|
|
&dev_attr_fnode_data_seq_in_order.attr,
|
|
&dev_attr_fnode_data_pdu_in_order.attr,
|
|
&dev_attr_fnode_chap_auth.attr,
|
|
&dev_attr_fnode_discovery_logout.attr,
|
|
&dev_attr_fnode_bidi_chap.attr,
|
|
&dev_attr_fnode_discovery_auth_optional.attr,
|
|
&dev_attr_fnode_erl.attr,
|
|
&dev_attr_fnode_first_burst_len.attr,
|
|
&dev_attr_fnode_def_time2wait.attr,
|
|
&dev_attr_fnode_def_time2retain.attr,
|
|
&dev_attr_fnode_max_outstanding_r2t.attr,
|
|
&dev_attr_fnode_isid.attr,
|
|
&dev_attr_fnode_tsid.attr,
|
|
&dev_attr_fnode_max_burst_len.attr,
|
|
&dev_attr_fnode_def_taskmgmt_tmo.attr,
|
|
&dev_attr_fnode_targetalias.attr,
|
|
&dev_attr_fnode_targetname.attr,
|
|
&dev_attr_fnode_tpgt.attr,
|
|
&dev_attr_fnode_discovery_parent_idx.attr,
|
|
&dev_attr_fnode_discovery_parent_type.attr,
|
|
&dev_attr_fnode_chap_in_idx.attr,
|
|
&dev_attr_fnode_chap_out_idx.attr,
|
|
&dev_attr_fnode_username.attr,
|
|
&dev_attr_fnode_username_in.attr,
|
|
&dev_attr_fnode_password.attr,
|
|
&dev_attr_fnode_password_in.attr,
|
|
&dev_attr_fnode_is_boot_target.attr,
|
|
NULL,
|
|
};
|
|
|
|
static umode_t iscsi_flashnode_sess_attr_is_visible(struct kobject *kobj,
|
|
struct attribute *attr,
|
|
int i)
|
|
{
|
|
struct device *dev = container_of(kobj, struct device, kobj);
|
|
struct iscsi_bus_flash_session *fnode_sess =
|
|
iscsi_dev_to_flash_session(dev);
|
|
struct iscsi_transport *t = fnode_sess->transport;
|
|
int param;
|
|
|
|
if (attr == &dev_attr_fnode_auto_snd_tgt_disable.attr) {
|
|
param = ISCSI_FLASHNODE_AUTO_SND_TGT_DISABLE;
|
|
} else if (attr == &dev_attr_fnode_discovery_session.attr) {
|
|
param = ISCSI_FLASHNODE_DISCOVERY_SESS;
|
|
} else if (attr == &dev_attr_fnode_portal_type.attr) {
|
|
param = ISCSI_FLASHNODE_PORTAL_TYPE;
|
|
} else if (attr == &dev_attr_fnode_entry_enable.attr) {
|
|
param = ISCSI_FLASHNODE_ENTRY_EN;
|
|
} else if (attr == &dev_attr_fnode_immediate_data.attr) {
|
|
param = ISCSI_FLASHNODE_IMM_DATA_EN;
|
|
} else if (attr == &dev_attr_fnode_initial_r2t.attr) {
|
|
param = ISCSI_FLASHNODE_INITIAL_R2T_EN;
|
|
} else if (attr == &dev_attr_fnode_data_seq_in_order.attr) {
|
|
param = ISCSI_FLASHNODE_DATASEQ_INORDER;
|
|
} else if (attr == &dev_attr_fnode_data_pdu_in_order.attr) {
|
|
param = ISCSI_FLASHNODE_PDU_INORDER;
|
|
} else if (attr == &dev_attr_fnode_chap_auth.attr) {
|
|
param = ISCSI_FLASHNODE_CHAP_AUTH_EN;
|
|
} else if (attr == &dev_attr_fnode_discovery_logout.attr) {
|
|
param = ISCSI_FLASHNODE_DISCOVERY_LOGOUT_EN;
|
|
} else if (attr == &dev_attr_fnode_bidi_chap.attr) {
|
|
param = ISCSI_FLASHNODE_BIDI_CHAP_EN;
|
|
} else if (attr == &dev_attr_fnode_discovery_auth_optional.attr) {
|
|
param = ISCSI_FLASHNODE_DISCOVERY_AUTH_OPTIONAL;
|
|
} else if (attr == &dev_attr_fnode_erl.attr) {
|
|
param = ISCSI_FLASHNODE_ERL;
|
|
} else if (attr == &dev_attr_fnode_first_burst_len.attr) {
|
|
param = ISCSI_FLASHNODE_FIRST_BURST;
|
|
} else if (attr == &dev_attr_fnode_def_time2wait.attr) {
|
|
param = ISCSI_FLASHNODE_DEF_TIME2WAIT;
|
|
} else if (attr == &dev_attr_fnode_def_time2retain.attr) {
|
|
param = ISCSI_FLASHNODE_DEF_TIME2RETAIN;
|
|
} else if (attr == &dev_attr_fnode_max_outstanding_r2t.attr) {
|
|
param = ISCSI_FLASHNODE_MAX_R2T;
|
|
} else if (attr == &dev_attr_fnode_isid.attr) {
|
|
param = ISCSI_FLASHNODE_ISID;
|
|
} else if (attr == &dev_attr_fnode_tsid.attr) {
|
|
param = ISCSI_FLASHNODE_TSID;
|
|
} else if (attr == &dev_attr_fnode_max_burst_len.attr) {
|
|
param = ISCSI_FLASHNODE_MAX_BURST;
|
|
} else if (attr == &dev_attr_fnode_def_taskmgmt_tmo.attr) {
|
|
param = ISCSI_FLASHNODE_DEF_TASKMGMT_TMO;
|
|
} else if (attr == &dev_attr_fnode_targetalias.attr) {
|
|
param = ISCSI_FLASHNODE_ALIAS;
|
|
} else if (attr == &dev_attr_fnode_targetname.attr) {
|
|
param = ISCSI_FLASHNODE_NAME;
|
|
} else if (attr == &dev_attr_fnode_tpgt.attr) {
|
|
param = ISCSI_FLASHNODE_TPGT;
|
|
} else if (attr == &dev_attr_fnode_discovery_parent_idx.attr) {
|
|
param = ISCSI_FLASHNODE_DISCOVERY_PARENT_IDX;
|
|
} else if (attr == &dev_attr_fnode_discovery_parent_type.attr) {
|
|
param = ISCSI_FLASHNODE_DISCOVERY_PARENT_TYPE;
|
|
} else if (attr == &dev_attr_fnode_chap_in_idx.attr) {
|
|
param = ISCSI_FLASHNODE_CHAP_IN_IDX;
|
|
} else if (attr == &dev_attr_fnode_chap_out_idx.attr) {
|
|
param = ISCSI_FLASHNODE_CHAP_OUT_IDX;
|
|
} else if (attr == &dev_attr_fnode_username.attr) {
|
|
param = ISCSI_FLASHNODE_USERNAME;
|
|
} else if (attr == &dev_attr_fnode_username_in.attr) {
|
|
param = ISCSI_FLASHNODE_USERNAME_IN;
|
|
} else if (attr == &dev_attr_fnode_password.attr) {
|
|
param = ISCSI_FLASHNODE_PASSWORD;
|
|
} else if (attr == &dev_attr_fnode_password_in.attr) {
|
|
param = ISCSI_FLASHNODE_PASSWORD_IN;
|
|
} else if (attr == &dev_attr_fnode_is_boot_target.attr) {
|
|
param = ISCSI_FLASHNODE_IS_BOOT_TGT;
|
|
} else {
|
|
WARN_ONCE(1, "Invalid flashnode session attr");
|
|
return 0;
|
|
}
|
|
|
|
return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param);
|
|
}
|
|
|
|
static struct attribute_group iscsi_flashnode_sess_attr_group = {
|
|
.attrs = iscsi_flashnode_sess_attrs,
|
|
.is_visible = iscsi_flashnode_sess_attr_is_visible,
|
|
};
|
|
|
|
static const struct attribute_group *iscsi_flashnode_sess_attr_groups[] = {
|
|
&iscsi_flashnode_sess_attr_group,
|
|
NULL,
|
|
};
|
|
|
|
static void iscsi_flashnode_sess_release(struct device *dev)
|
|
{
|
|
struct iscsi_bus_flash_session *fnode_sess =
|
|
iscsi_dev_to_flash_session(dev);
|
|
|
|
kfree(fnode_sess->targetname);
|
|
kfree(fnode_sess->targetalias);
|
|
kfree(fnode_sess->portal_type);
|
|
kfree(fnode_sess);
|
|
}
|
|
|
|
struct device_type iscsi_flashnode_sess_dev_type = {
|
|
.name = "iscsi_flashnode_sess_dev_type",
|
|
.groups = iscsi_flashnode_sess_attr_groups,
|
|
.release = iscsi_flashnode_sess_release,
|
|
};
|
|
|
|
/* flash node connection attrs show */
|
|
#define iscsi_flashnode_conn_attr_show(type, name, param) \
|
|
static ssize_t \
|
|
show_##type##_##name(struct device *dev, struct device_attribute *attr, \
|
|
char *buf) \
|
|
{ \
|
|
struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);\
|
|
struct iscsi_bus_flash_session *fnode_sess = \
|
|
iscsi_flash_conn_to_flash_session(fnode_conn);\
|
|
struct iscsi_transport *t = fnode_conn->transport; \
|
|
return t->get_flashnode_param(fnode_sess, param, buf); \
|
|
} \
|
|
|
|
|
|
#define iscsi_flashnode_conn_attr(type, name, param) \
|
|
iscsi_flashnode_conn_attr_show(type, name, param) \
|
|
static ISCSI_FLASHNODE_ATTR(type, name, S_IRUGO, \
|
|
show_##type##_##name, NULL);
|
|
|
|
/* Flash node connection attributes */
|
|
|
|
iscsi_flashnode_conn_attr(fnode, is_fw_assigned_ipv6,
|
|
ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6);
|
|
iscsi_flashnode_conn_attr(fnode, header_digest, ISCSI_FLASHNODE_HDR_DGST_EN);
|
|
iscsi_flashnode_conn_attr(fnode, data_digest, ISCSI_FLASHNODE_DATA_DGST_EN);
|
|
iscsi_flashnode_conn_attr(fnode, snack_req, ISCSI_FLASHNODE_SNACK_REQ_EN);
|
|
iscsi_flashnode_conn_attr(fnode, tcp_timestamp_stat,
|
|
ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT);
|
|
iscsi_flashnode_conn_attr(fnode, tcp_nagle_disable,
|
|
ISCSI_FLASHNODE_TCP_NAGLE_DISABLE);
|
|
iscsi_flashnode_conn_attr(fnode, tcp_wsf_disable,
|
|
ISCSI_FLASHNODE_TCP_WSF_DISABLE);
|
|
iscsi_flashnode_conn_attr(fnode, tcp_timer_scale,
|
|
ISCSI_FLASHNODE_TCP_TIMER_SCALE);
|
|
iscsi_flashnode_conn_attr(fnode, tcp_timestamp_enable,
|
|
ISCSI_FLASHNODE_TCP_TIMESTAMP_EN);
|
|
iscsi_flashnode_conn_attr(fnode, fragment_disable,
|
|
ISCSI_FLASHNODE_IP_FRAG_DISABLE);
|
|
iscsi_flashnode_conn_attr(fnode, keepalive_tmo, ISCSI_FLASHNODE_KEEPALIVE_TMO);
|
|
iscsi_flashnode_conn_attr(fnode, port, ISCSI_FLASHNODE_PORT);
|
|
iscsi_flashnode_conn_attr(fnode, ipaddress, ISCSI_FLASHNODE_IPADDR);
|
|
iscsi_flashnode_conn_attr(fnode, max_recv_dlength,
|
|
ISCSI_FLASHNODE_MAX_RECV_DLENGTH);
|
|
iscsi_flashnode_conn_attr(fnode, max_xmit_dlength,
|
|
ISCSI_FLASHNODE_MAX_XMIT_DLENGTH);
|
|
iscsi_flashnode_conn_attr(fnode, local_port, ISCSI_FLASHNODE_LOCAL_PORT);
|
|
iscsi_flashnode_conn_attr(fnode, ipv4_tos, ISCSI_FLASHNODE_IPV4_TOS);
|
|
iscsi_flashnode_conn_attr(fnode, ipv6_traffic_class, ISCSI_FLASHNODE_IPV6_TC);
|
|
iscsi_flashnode_conn_attr(fnode, ipv6_flow_label,
|
|
ISCSI_FLASHNODE_IPV6_FLOW_LABEL);
|
|
iscsi_flashnode_conn_attr(fnode, redirect_ipaddr,
|
|
ISCSI_FLASHNODE_REDIRECT_IPADDR);
|
|
iscsi_flashnode_conn_attr(fnode, max_segment_size,
|
|
ISCSI_FLASHNODE_MAX_SEGMENT_SIZE);
|
|
iscsi_flashnode_conn_attr(fnode, link_local_ipv6,
|
|
ISCSI_FLASHNODE_LINK_LOCAL_IPV6);
|
|
iscsi_flashnode_conn_attr(fnode, tcp_xmit_wsf, ISCSI_FLASHNODE_TCP_XMIT_WSF);
|
|
iscsi_flashnode_conn_attr(fnode, tcp_recv_wsf, ISCSI_FLASHNODE_TCP_RECV_WSF);
|
|
iscsi_flashnode_conn_attr(fnode, statsn, ISCSI_FLASHNODE_STATSN);
|
|
iscsi_flashnode_conn_attr(fnode, exp_statsn, ISCSI_FLASHNODE_EXP_STATSN);
|
|
|
|
static struct attribute *iscsi_flashnode_conn_attrs[] = {
|
|
&dev_attr_fnode_is_fw_assigned_ipv6.attr,
|
|
&dev_attr_fnode_header_digest.attr,
|
|
&dev_attr_fnode_data_digest.attr,
|
|
&dev_attr_fnode_snack_req.attr,
|
|
&dev_attr_fnode_tcp_timestamp_stat.attr,
|
|
&dev_attr_fnode_tcp_nagle_disable.attr,
|
|
&dev_attr_fnode_tcp_wsf_disable.attr,
|
|
&dev_attr_fnode_tcp_timer_scale.attr,
|
|
&dev_attr_fnode_tcp_timestamp_enable.attr,
|
|
&dev_attr_fnode_fragment_disable.attr,
|
|
&dev_attr_fnode_max_recv_dlength.attr,
|
|
&dev_attr_fnode_max_xmit_dlength.attr,
|
|
&dev_attr_fnode_keepalive_tmo.attr,
|
|
&dev_attr_fnode_port.attr,
|
|
&dev_attr_fnode_ipaddress.attr,
|
|
&dev_attr_fnode_redirect_ipaddr.attr,
|
|
&dev_attr_fnode_max_segment_size.attr,
|
|
&dev_attr_fnode_local_port.attr,
|
|
&dev_attr_fnode_ipv4_tos.attr,
|
|
&dev_attr_fnode_ipv6_traffic_class.attr,
|
|
&dev_attr_fnode_ipv6_flow_label.attr,
|
|
&dev_attr_fnode_link_local_ipv6.attr,
|
|
&dev_attr_fnode_tcp_xmit_wsf.attr,
|
|
&dev_attr_fnode_tcp_recv_wsf.attr,
|
|
&dev_attr_fnode_statsn.attr,
|
|
&dev_attr_fnode_exp_statsn.attr,
|
|
NULL,
|
|
};
|
|
|
|
static umode_t iscsi_flashnode_conn_attr_is_visible(struct kobject *kobj,
|
|
struct attribute *attr,
|
|
int i)
|
|
{
|
|
struct device *dev = container_of(kobj, struct device, kobj);
|
|
struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);
|
|
struct iscsi_transport *t = fnode_conn->transport;
|
|
int param;
|
|
|
|
if (attr == &dev_attr_fnode_is_fw_assigned_ipv6.attr) {
|
|
param = ISCSI_FLASHNODE_IS_FW_ASSIGNED_IPV6;
|
|
} else if (attr == &dev_attr_fnode_header_digest.attr) {
|
|
param = ISCSI_FLASHNODE_HDR_DGST_EN;
|
|
} else if (attr == &dev_attr_fnode_data_digest.attr) {
|
|
param = ISCSI_FLASHNODE_DATA_DGST_EN;
|
|
} else if (attr == &dev_attr_fnode_snack_req.attr) {
|
|
param = ISCSI_FLASHNODE_SNACK_REQ_EN;
|
|
} else if (attr == &dev_attr_fnode_tcp_timestamp_stat.attr) {
|
|
param = ISCSI_FLASHNODE_TCP_TIMESTAMP_STAT;
|
|
} else if (attr == &dev_attr_fnode_tcp_nagle_disable.attr) {
|
|
param = ISCSI_FLASHNODE_TCP_NAGLE_DISABLE;
|
|
} else if (attr == &dev_attr_fnode_tcp_wsf_disable.attr) {
|
|
param = ISCSI_FLASHNODE_TCP_WSF_DISABLE;
|
|
} else if (attr == &dev_attr_fnode_tcp_timer_scale.attr) {
|
|
param = ISCSI_FLASHNODE_TCP_TIMER_SCALE;
|
|
} else if (attr == &dev_attr_fnode_tcp_timestamp_enable.attr) {
|
|
param = ISCSI_FLASHNODE_TCP_TIMESTAMP_EN;
|
|
} else if (attr == &dev_attr_fnode_fragment_disable.attr) {
|
|
param = ISCSI_FLASHNODE_IP_FRAG_DISABLE;
|
|
} else if (attr == &dev_attr_fnode_max_recv_dlength.attr) {
|
|
param = ISCSI_FLASHNODE_MAX_RECV_DLENGTH;
|
|
} else if (attr == &dev_attr_fnode_max_xmit_dlength.attr) {
|
|
param = ISCSI_FLASHNODE_MAX_XMIT_DLENGTH;
|
|
} else if (attr == &dev_attr_fnode_keepalive_tmo.attr) {
|
|
param = ISCSI_FLASHNODE_KEEPALIVE_TMO;
|
|
} else if (attr == &dev_attr_fnode_port.attr) {
|
|
param = ISCSI_FLASHNODE_PORT;
|
|
} else if (attr == &dev_attr_fnode_ipaddress.attr) {
|
|
param = ISCSI_FLASHNODE_IPADDR;
|
|
} else if (attr == &dev_attr_fnode_redirect_ipaddr.attr) {
|
|
param = ISCSI_FLASHNODE_REDIRECT_IPADDR;
|
|
} else if (attr == &dev_attr_fnode_max_segment_size.attr) {
|
|
param = ISCSI_FLASHNODE_MAX_SEGMENT_SIZE;
|
|
} else if (attr == &dev_attr_fnode_local_port.attr) {
|
|
param = ISCSI_FLASHNODE_LOCAL_PORT;
|
|
} else if (attr == &dev_attr_fnode_ipv4_tos.attr) {
|
|
param = ISCSI_FLASHNODE_IPV4_TOS;
|
|
} else if (attr == &dev_attr_fnode_ipv6_traffic_class.attr) {
|
|
param = ISCSI_FLASHNODE_IPV6_TC;
|
|
} else if (attr == &dev_attr_fnode_ipv6_flow_label.attr) {
|
|
param = ISCSI_FLASHNODE_IPV6_FLOW_LABEL;
|
|
} else if (attr == &dev_attr_fnode_link_local_ipv6.attr) {
|
|
param = ISCSI_FLASHNODE_LINK_LOCAL_IPV6;
|
|
} else if (attr == &dev_attr_fnode_tcp_xmit_wsf.attr) {
|
|
param = ISCSI_FLASHNODE_TCP_XMIT_WSF;
|
|
} else if (attr == &dev_attr_fnode_tcp_recv_wsf.attr) {
|
|
param = ISCSI_FLASHNODE_TCP_RECV_WSF;
|
|
} else if (attr == &dev_attr_fnode_statsn.attr) {
|
|
param = ISCSI_FLASHNODE_STATSN;
|
|
} else if (attr == &dev_attr_fnode_exp_statsn.attr) {
|
|
param = ISCSI_FLASHNODE_EXP_STATSN;
|
|
} else {
|
|
WARN_ONCE(1, "Invalid flashnode connection attr");
|
|
return 0;
|
|
}
|
|
|
|
return t->attr_is_visible(ISCSI_FLASHNODE_PARAM, param);
|
|
}
|
|
|
|
static struct attribute_group iscsi_flashnode_conn_attr_group = {
|
|
.attrs = iscsi_flashnode_conn_attrs,
|
|
.is_visible = iscsi_flashnode_conn_attr_is_visible,
|
|
};
|
|
|
|
static const struct attribute_group *iscsi_flashnode_conn_attr_groups[] = {
|
|
&iscsi_flashnode_conn_attr_group,
|
|
NULL,
|
|
};
|
|
|
|
static void iscsi_flashnode_conn_release(struct device *dev)
|
|
{
|
|
struct iscsi_bus_flash_conn *fnode_conn = iscsi_dev_to_flash_conn(dev);
|
|
|
|
kfree(fnode_conn->ipaddress);
|
|
kfree(fnode_conn->redirect_ipaddr);
|
|
kfree(fnode_conn->link_local_ipv6_addr);
|
|
kfree(fnode_conn);
|
|
}
|
|
|
|
struct device_type iscsi_flashnode_conn_dev_type = {
|
|
.name = "iscsi_flashnode_conn_dev_type",
|
|
.groups = iscsi_flashnode_conn_attr_groups,
|
|
.release = iscsi_flashnode_conn_release,
|
|
};
|
|
|
|
struct bus_type iscsi_flashnode_bus;
|
|
|
|
int iscsi_flashnode_bus_match(struct device *dev,
|
|
struct device_driver *drv)
|
|
{
|
|
if (dev->bus == &iscsi_flashnode_bus)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(iscsi_flashnode_bus_match);
|
|
|
|
struct bus_type iscsi_flashnode_bus = {
|
|
.name = "iscsi_flashnode",
|
|
.match = &iscsi_flashnode_bus_match,
|
|
};
|
|
|
|
/**
|
|
* iscsi_create_flashnode_sess - Add flashnode session entry in sysfs
|
|
* @shost: pointer to host data
|
|
* @index: index of flashnode to add in sysfs
|
|
* @transport: pointer to transport data
|
|
* @dd_size: total size to allocate
|
|
*
|
|
* Adds a sysfs entry for the flashnode session attributes
|
|
*
|
|
* Returns:
|
|
* pointer to allocated flashnode sess on sucess
|
|
* %NULL on failure
|
|
*/
|
|
struct iscsi_bus_flash_session *
|
|
iscsi_create_flashnode_sess(struct Scsi_Host *shost, int index,
|
|
struct iscsi_transport *transport,
|
|
int dd_size)
|
|
{
|
|
struct iscsi_bus_flash_session *fnode_sess;
|
|
int err;
|
|
|
|
fnode_sess = kzalloc(sizeof(*fnode_sess) + dd_size, GFP_KERNEL);
|
|
if (!fnode_sess)
|
|
return NULL;
|
|
|
|
fnode_sess->transport = transport;
|
|
fnode_sess->target_id = index;
|
|
fnode_sess->dev.type = &iscsi_flashnode_sess_dev_type;
|
|
fnode_sess->dev.bus = &iscsi_flashnode_bus;
|
|
fnode_sess->dev.parent = &shost->shost_gendev;
|
|
dev_set_name(&fnode_sess->dev, "flashnode_sess-%u:%u",
|
|
shost->host_no, index);
|
|
|
|
err = device_register(&fnode_sess->dev);
|
|
if (err)
|
|
goto free_fnode_sess;
|
|
|
|
if (dd_size)
|
|
fnode_sess->dd_data = &fnode_sess[1];
|
|
|
|
return fnode_sess;
|
|
|
|
free_fnode_sess:
|
|
kfree(fnode_sess);
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL_GPL(iscsi_create_flashnode_sess);
|
|
|
|
/**
|
|
* iscsi_create_flashnode_conn - Add flashnode conn entry in sysfs
|
|
* @shost: pointer to host data
|
|
* @fnode_sess: pointer to the parent flashnode session entry
|
|
* @transport: pointer to transport data
|
|
* @dd_size: total size to allocate
|
|
*
|
|
* Adds a sysfs entry for the flashnode connection attributes
|
|
*
|
|
* Returns:
|
|
* pointer to allocated flashnode conn on success
|
|
* %NULL on failure
|
|
*/
|
|
struct iscsi_bus_flash_conn *
|
|
iscsi_create_flashnode_conn(struct Scsi_Host *shost,
|
|
struct iscsi_bus_flash_session *fnode_sess,
|
|
struct iscsi_transport *transport,
|
|
int dd_size)
|
|
{
|
|
struct iscsi_bus_flash_conn *fnode_conn;
|
|
int err;
|
|
|
|
fnode_conn = kzalloc(sizeof(*fnode_conn) + dd_size, GFP_KERNEL);
|
|
if (!fnode_conn)
|
|
return NULL;
|
|
|
|
fnode_conn->transport = transport;
|
|
fnode_conn->dev.type = &iscsi_flashnode_conn_dev_type;
|
|
fnode_conn->dev.bus = &iscsi_flashnode_bus;
|
|
fnode_conn->dev.parent = &fnode_sess->dev;
|
|
dev_set_name(&fnode_conn->dev, "flashnode_conn-%u:%u:0",
|
|
shost->host_no, fnode_sess->target_id);
|
|
|
|
err = device_register(&fnode_conn->dev);
|
|
if (err)
|
|
goto free_fnode_conn;
|
|
|
|
if (dd_size)
|
|
fnode_conn->dd_data = &fnode_conn[1];
|
|
|
|
return fnode_conn;
|
|
|
|
free_fnode_conn:
|
|
kfree(fnode_conn);
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL_GPL(iscsi_create_flashnode_conn);
|
|
|
|
/**
|
|
* iscsi_is_flashnode_conn_dev - verify passed device is to be flashnode conn
|
|
* @dev: device to verify
|
|
* @data: pointer to data containing value to use for verification
|
|
*
|
|
* Verifies if the passed device is flashnode conn device
|
|
*
|
|
* Returns:
|
|
* 1 on success
|
|
* 0 on failure
|
|
*/
|
|
int iscsi_is_flashnode_conn_dev(struct device *dev, void *data)
|
|
{
|
|
return dev->bus == &iscsi_flashnode_bus;
|
|
}
|
|
EXPORT_SYMBOL_GPL(iscsi_is_flashnode_conn_dev);
|
|
|
|
static int iscsi_destroy_flashnode_conn(struct iscsi_bus_flash_conn *fnode_conn)
|
|
{
|
|
device_unregister(&fnode_conn->dev);
|
|
return 0;
|
|
}
|
|
|
|
static int flashnode_match_index(struct device *dev, void *data)
|
|
{
|
|
struct iscsi_bus_flash_session *fnode_sess = NULL;
|
|
int ret = 0;
|
|
|
|
if (!iscsi_flashnode_bus_match(dev, NULL))
|
|
goto exit_match_index;
|
|
|
|
fnode_sess = iscsi_dev_to_flash_session(dev);
|
|
ret = (fnode_sess->target_id == *((int *)data)) ? 1 : 0;
|
|
|
|
exit_match_index:
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* iscsi_get_flashnode_by_index -finds flashnode session entry by index
|
|
* @shost: pointer to host data
|
|
* @idx: index to match
|
|
*
|
|
* Finds the flashnode session object for the passed index
|
|
*
|
|
* Returns:
|
|
* pointer to found flashnode session object on success
|
|
* %NULL on failure
|
|
*/
|
|
static struct iscsi_bus_flash_session *
|
|
iscsi_get_flashnode_by_index(struct Scsi_Host *shost, uint32_t idx)
|
|
{
|
|
struct iscsi_bus_flash_session *fnode_sess = NULL;
|
|
struct device *dev;
|
|
|
|
dev = device_find_child(&shost->shost_gendev, &idx,
|
|
flashnode_match_index);
|
|
if (dev)
|
|
fnode_sess = iscsi_dev_to_flash_session(dev);
|
|
|
|
return fnode_sess;
|
|
}
|
|
|
|
/**
|
|
* iscsi_find_flashnode_sess - finds flashnode session entry
|
|
* @shost: pointer to host data
|
|
* @data: pointer to data containing value to use for comparison
|
|
* @fn: function pointer that does actual comparison
|
|
*
|
|
* Finds the flashnode session object comparing the data passed using logic
|
|
* defined in passed function pointer
|
|
*
|
|
* Returns:
|
|
* pointer to found flashnode session device object on success
|
|
* %NULL on failure
|
|
*/
|
|
struct device *
|
|
iscsi_find_flashnode_sess(struct Scsi_Host *shost, void *data,
|
|
int (*fn)(struct device *dev, void *data))
|
|
{
|
|
return device_find_child(&shost->shost_gendev, data, fn);
|
|
}
|
|
EXPORT_SYMBOL_GPL(iscsi_find_flashnode_sess);
|
|
|
|
/**
|
|
* iscsi_find_flashnode_conn - finds flashnode connection entry
|
|
* @fnode_sess: pointer to parent flashnode session entry
|
|
*
|
|
* Finds the flashnode connection object comparing the data passed using logic
|
|
* defined in passed function pointer
|
|
*
|
|
* Returns:
|
|
* pointer to found flashnode connection device object on success
|
|
* %NULL on failure
|
|
*/
|
|
struct device *
|
|
iscsi_find_flashnode_conn(struct iscsi_bus_flash_session *fnode_sess)
|
|
{
|
|
return device_find_child(&fnode_sess->dev, NULL,
|
|
iscsi_is_flashnode_conn_dev);
|
|
}
|
|
EXPORT_SYMBOL_GPL(iscsi_find_flashnode_conn);
|
|
|
|
static int iscsi_iter_destroy_flashnode_conn_fn(struct device *dev, void *data)
|
|
{
|
|
if (!iscsi_is_flashnode_conn_dev(dev, NULL))
|
|
return 0;
|
|
|
|
return iscsi_destroy_flashnode_conn(iscsi_dev_to_flash_conn(dev));
|
|
}
|
|
|
|
/**
|
|
* iscsi_destroy_flashnode_sess - destory flashnode session entry
|
|
* @fnode_sess: pointer to flashnode session entry to be destroyed
|
|
*
|
|
* Deletes the flashnode session entry and all children flashnode connection
|
|
* entries from sysfs
|
|
*/
|
|
void iscsi_destroy_flashnode_sess(struct iscsi_bus_flash_session *fnode_sess)
|
|
{
|
|
int err;
|
|
|
|
err = device_for_each_child(&fnode_sess->dev, NULL,
|
|
iscsi_iter_destroy_flashnode_conn_fn);
|
|
if (err)
|
|
pr_err("Could not delete all connections for %s. Error %d.\n",
|
|
fnode_sess->dev.kobj.name, err);
|
|
|
|
device_unregister(&fnode_sess->dev);
|
|
}
|
|
EXPORT_SYMBOL_GPL(iscsi_destroy_flashnode_sess);
|
|
|
|
static int iscsi_iter_destroy_flashnode_fn(struct device *dev, void *data)
|
|
{
|
|
if (!iscsi_flashnode_bus_match(dev, NULL))
|
|
return 0;
|
|
|
|
iscsi_destroy_flashnode_sess(iscsi_dev_to_flash_session(dev));
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* iscsi_destroy_all_flashnode - destory all flashnode session entries
|
|
* @shost: pointer to host data
|
|
*
|
|
* Destroys all the flashnode session entries and all corresponding children
|
|
* flashnode connection entries from sysfs
|
|
*/
|
|
void iscsi_destroy_all_flashnode(struct Scsi_Host *shost)
|
|
{
|
|
device_for_each_child(&shost->shost_gendev, NULL,
|
|
iscsi_iter_destroy_flashnode_fn);
|
|
}
|
|
EXPORT_SYMBOL_GPL(iscsi_destroy_all_flashnode);
|
|
|
|
/*
|
|
* BSG support
|
|
*/
|
|
/**
|
|
* iscsi_bsg_host_dispatch - Dispatch command to LLD.
|
|
* @job: bsg job to be processed
|
|
*/
|
|
static int iscsi_bsg_host_dispatch(struct bsg_job *job)
|
|
{
|
|
struct Scsi_Host *shost = iscsi_job_to_shost(job);
|
|
struct iscsi_bsg_request *req = job->request;
|
|
struct iscsi_bsg_reply *reply = job->reply;
|
|
struct iscsi_internal *i = to_iscsi_internal(shost->transportt);
|
|
int cmdlen = sizeof(uint32_t); /* start with length of msgcode */
|
|
int ret;
|
|
|
|
/* check if we have the msgcode value at least */
|
|
if (job->request_len < sizeof(uint32_t)) {
|
|
ret = -ENOMSG;
|
|
goto fail_host_msg;
|
|
}
|
|
|
|
/* Validate the host command */
|
|
switch (req->msgcode) {
|
|
case ISCSI_BSG_HST_VENDOR:
|
|
cmdlen += sizeof(struct iscsi_bsg_host_vendor);
|
|
if ((shost->hostt->vendor_id == 0L) ||
|
|
(req->rqst_data.h_vendor.vendor_id !=
|
|
shost->hostt->vendor_id)) {
|
|
ret = -ESRCH;
|
|
goto fail_host_msg;
|
|
}
|
|
break;
|
|
default:
|
|
ret = -EBADR;
|
|
goto fail_host_msg;
|
|
}
|
|
|
|
/* check if we really have all the request data needed */
|
|
if (job->request_len < cmdlen) {
|
|
ret = -ENOMSG;
|
|
goto fail_host_msg;
|
|
}
|
|
|
|
ret = i->iscsi_transport->bsg_request(job);
|
|
if (!ret)
|
|
return 0;
|
|
|
|
fail_host_msg:
|
|
/* return the errno failure code as the only status */
|
|
BUG_ON(job->reply_len < sizeof(uint32_t));
|
|
reply->reply_payload_rcv_len = 0;
|
|
reply->result = ret;
|
|
job->reply_len = sizeof(uint32_t);
|
|
bsg_job_done(job, ret, 0);
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* iscsi_bsg_host_add - Create and add the bsg hooks to receive requests
|
|
* @shost: shost for iscsi_host
|
|
* @ihost: iscsi_cls_host adding the structures to
|
|
*/
|
|
static int
|
|
iscsi_bsg_host_add(struct Scsi_Host *shost, struct iscsi_cls_host *ihost)
|
|
{
|
|
struct device *dev = &shost->shost_gendev;
|
|
struct iscsi_internal *i = to_iscsi_internal(shost->transportt);
|
|
struct request_queue *q;
|
|
char bsg_name[20];
|
|
int ret;
|
|
|
|
if (!i->iscsi_transport->bsg_request)
|
|
return -ENOTSUPP;
|
|
|
|
snprintf(bsg_name, sizeof(bsg_name), "iscsi_host%d", shost->host_no);
|
|
|
|
q = __scsi_alloc_queue(shost, bsg_request_fn);
|
|
if (!q)
|
|
return -ENOMEM;
|
|
|
|
ret = bsg_setup_queue(dev, q, bsg_name, iscsi_bsg_host_dispatch, 0);
|
|
if (ret) {
|
|
shost_printk(KERN_ERR, shost, "bsg interface failed to "
|
|
"initialize - no request queue\n");
|
|
blk_cleanup_queue(q);
|
|
return ret;
|
|
}
|
|
|
|
ihost->bsg_q = q;
|
|
return 0;
|
|
}
|
|
|
|
static int iscsi_setup_host(struct transport_container *tc, struct device *dev,
|
|
struct device *cdev)
|
|
{
|
|
struct Scsi_Host *shost = dev_to_shost(dev);
|
|
struct iscsi_cls_host *ihost = shost->shost_data;
|
|
|
|
memset(ihost, 0, sizeof(*ihost));
|
|
atomic_set(&ihost->nr_scans, 0);
|
|
mutex_init(&ihost->mutex);
|
|
|
|
iscsi_bsg_host_add(shost, ihost);
|
|
/* ignore any bsg add error - we just can't do sgio */
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int iscsi_remove_host(struct transport_container *tc,
|
|
struct device *dev, struct device *cdev)
|
|
{
|
|
struct Scsi_Host *shost = dev_to_shost(dev);
|
|
struct iscsi_cls_host *ihost = shost->shost_data;
|
|
|
|
if (ihost->bsg_q) {
|
|
bsg_unregister_queue(ihost->bsg_q);
|
|
blk_cleanup_queue(ihost->bsg_q);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static DECLARE_TRANSPORT_CLASS(iscsi_host_class,
|
|
"iscsi_host",
|
|
iscsi_setup_host,
|
|
iscsi_remove_host,
|
|
NULL);
|
|
|
|
static DECLARE_TRANSPORT_CLASS(iscsi_session_class,
|
|
"iscsi_session",
|
|
NULL,
|
|
NULL,
|
|
NULL);
|
|
|
|
static DECLARE_TRANSPORT_CLASS(iscsi_connection_class,
|
|
"iscsi_connection",
|
|
NULL,
|
|
NULL,
|
|
NULL);
|
|
|
|
static struct sock *nls;
|
|
static DEFINE_MUTEX(rx_queue_mutex);
|
|
|
|
static LIST_HEAD(sesslist);
|
|
static DEFINE_SPINLOCK(sesslock);
|
|
static LIST_HEAD(connlist);
|
|
static DEFINE_SPINLOCK(connlock);
|
|
|
|
static uint32_t iscsi_conn_get_sid(struct iscsi_cls_conn *conn)
|
|
{
|
|
struct iscsi_cls_session *sess = iscsi_dev_to_session(conn->dev.parent);
|
|
return sess->sid;
|
|
}
|
|
|
|
/*
|
|
* Returns the matching session to a given sid
|
|
*/
|
|
static struct iscsi_cls_session *iscsi_session_lookup(uint32_t sid)
|
|
{
|
|
unsigned long flags;
|
|
struct iscsi_cls_session *sess;
|
|
|
|
spin_lock_irqsave(&sesslock, flags);
|
|
list_for_each_entry(sess, &sesslist, sess_list) {
|
|
if (sess->sid == sid) {
|
|
spin_unlock_irqrestore(&sesslock, flags);
|
|
return sess;
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&sesslock, flags);
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* Returns the matching connection to a given sid / cid tuple
|
|
*/
|
|
static struct iscsi_cls_conn *iscsi_conn_lookup(uint32_t sid, uint32_t cid)
|
|
{
|
|
unsigned long flags;
|
|
struct iscsi_cls_conn *conn;
|
|
|
|
spin_lock_irqsave(&connlock, flags);
|
|
list_for_each_entry(conn, &connlist, conn_list) {
|
|
if ((conn->cid == cid) && (iscsi_conn_get_sid(conn) == sid)) {
|
|
spin_unlock_irqrestore(&connlock, flags);
|
|
return conn;
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&connlock, flags);
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* The following functions can be used by LLDs that allocate
|
|
* their own scsi_hosts or by software iscsi LLDs
|
|
*/
|
|
static struct {
|
|
int value;
|
|
char *name;
|
|
} iscsi_session_state_names[] = {
|
|
{ ISCSI_SESSION_LOGGED_IN, "LOGGED_IN" },
|
|
{ ISCSI_SESSION_FAILED, "FAILED" },
|
|
{ ISCSI_SESSION_FREE, "FREE" },
|
|
};
|
|
|
|
static const char *iscsi_session_state_name(int state)
|
|
{
|
|
int i;
|
|
char *name = NULL;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(iscsi_session_state_names); i++) {
|
|
if (iscsi_session_state_names[i].value == state) {
|
|
name = iscsi_session_state_names[i].name;
|
|
break;
|
|
}
|
|
}
|
|
return name;
|
|
}
|
|
|
|
int iscsi_session_chkready(struct iscsi_cls_session *session)
|
|
{
|
|
unsigned long flags;
|
|
int err;
|
|
|
|
spin_lock_irqsave(&session->lock, flags);
|
|
switch (session->state) {
|
|
case ISCSI_SESSION_LOGGED_IN:
|
|
err = 0;
|
|
break;
|
|
case ISCSI_SESSION_FAILED:
|
|
err = DID_IMM_RETRY << 16;
|
|
break;
|
|
case ISCSI_SESSION_FREE:
|
|
err = DID_TRANSPORT_FAILFAST << 16;
|
|
break;
|
|
default:
|
|
err = DID_NO_CONNECT << 16;
|
|
break;
|
|
}
|
|
spin_unlock_irqrestore(&session->lock, flags);
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL_GPL(iscsi_session_chkready);
|
|
|
|
int iscsi_is_session_online(struct iscsi_cls_session *session)
|
|
{
|
|
unsigned long flags;
|
|
int ret = 0;
|
|
|
|
spin_lock_irqsave(&session->lock, flags);
|
|
if (session->state == ISCSI_SESSION_LOGGED_IN)
|
|
ret = 1;
|
|
spin_unlock_irqrestore(&session->lock, flags);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(iscsi_is_session_online);
|
|
|
|
static void iscsi_session_release(struct device *dev)
|
|
{
|
|
struct iscsi_cls_session *session = iscsi_dev_to_session(dev);
|
|
struct Scsi_Host *shost;
|
|
|
|
shost = iscsi_session_to_shost(session);
|
|
scsi_host_put(shost);
|
|
ISCSI_DBG_TRANS_SESSION(session, "Completing session release\n");
|
|
kfree(session);
|
|
}
|
|
|
|
int iscsi_is_session_dev(const struct device *dev)
|
|
{
|
|
return dev->release == iscsi_session_release;
|
|
}
|
|
EXPORT_SYMBOL_GPL(iscsi_is_session_dev);
|
|
|
|
static int iscsi_iter_session_fn(struct device *dev, void *data)
|
|
{
|
|
void (* fn) (struct iscsi_cls_session *) = data;
|
|
|
|
if (!iscsi_is_session_dev(dev))
|
|
return 0;
|
|
fn(iscsi_dev_to_session(dev));
|
|
return 0;
|
|
}
|
|
|
|
void iscsi_host_for_each_session(struct Scsi_Host *shost,
|
|
void (*fn)(struct iscsi_cls_session *))
|
|
{
|
|
device_for_each_child(&shost->shost_gendev, fn,
|
|
iscsi_iter_session_fn);
|
|
}
|
|
EXPORT_SYMBOL_GPL(iscsi_host_for_each_session);
|
|
|
|
/**
|
|
* iscsi_scan_finished - helper to report when running scans are done
|
|
* @shost: scsi host
|
|
* @time: scan run time
|
|
*
|
|
* This function can be used by drives like qla4xxx to report to the scsi
|
|
* layer when the scans it kicked off at module load time are done.
|
|
*/
|
|
int iscsi_scan_finished(struct Scsi_Host *shost, unsigned long time)
|
|
{
|
|
struct iscsi_cls_host *ihost = shost->shost_data;
|
|
/*
|
|
* qla4xxx will have kicked off some session unblocks before calling
|
|
* scsi_scan_host, so just wait for them to complete.
|
|
*/
|
|
return !atomic_read(&ihost->nr_scans);
|
|
}
|
|
EXPORT_SYMBOL_GPL(iscsi_scan_finished);
|
|
|
|
struct iscsi_scan_data {
|
|
unsigned int channel;
|
|
unsigned int id;
|
|
unsigned int lun;
|
|
};
|
|
|
|
static int iscsi_user_scan_session(struct device *dev, void *data)
|
|
{
|
|
struct iscsi_scan_data *scan_data = data;
|
|
struct iscsi_cls_session *session;
|
|
struct Scsi_Host *shost;
|
|
struct iscsi_cls_host *ihost;
|
|
unsigned long flags;
|
|
unsigned int id;
|
|
|
|
if (!iscsi_is_session_dev(dev))
|
|
return 0;
|
|
|
|
session = iscsi_dev_to_session(dev);
|
|
|
|
ISCSI_DBG_TRANS_SESSION(session, "Scanning session\n");
|
|
|
|
shost = iscsi_session_to_shost(session);
|
|
ihost = shost->shost_data;
|
|
|
|
mutex_lock(&ihost->mutex);
|
|
spin_lock_irqsave(&session->lock, flags);
|
|
if (session->state != ISCSI_SESSION_LOGGED_IN) {
|
|
spin_unlock_irqrestore(&session->lock, flags);
|
|
goto user_scan_exit;
|
|
}
|
|
id = session->target_id;
|
|
spin_unlock_irqrestore(&session->lock, flags);
|
|
|
|
if (id != ISCSI_MAX_TARGET) {
|
|
if ((scan_data->channel == SCAN_WILD_CARD ||
|
|
scan_data->channel == 0) &&
|
|
(scan_data->id == SCAN_WILD_CARD ||
|
|
scan_data->id == id))
|
|
scsi_scan_target(&session->dev, 0, id,
|
|
scan_data->lun, 1);
|
|
}
|
|
|
|
user_scan_exit:
|
|
mutex_unlock(&ihost->mutex);
|
|
ISCSI_DBG_TRANS_SESSION(session, "Completed session scan\n");
|
|
return 0;
|
|
}
|
|
|
|
static int iscsi_user_scan(struct Scsi_Host *shost, uint channel,
|
|
uint id, uint lun)
|
|
{
|
|
struct iscsi_scan_data scan_data;
|
|
|
|
scan_data.channel = channel;
|
|
scan_data.id = id;
|
|
scan_data.lun = lun;
|
|
|
|
return device_for_each_child(&shost->shost_gendev, &scan_data,
|
|
iscsi_user_scan_session);
|
|
}
|
|
|
|
static void iscsi_scan_session(struct work_struct *work)
|
|
{
|
|
struct iscsi_cls_session *session =
|
|
container_of(work, struct iscsi_cls_session, scan_work);
|
|
struct Scsi_Host *shost = iscsi_session_to_shost(session);
|
|
struct iscsi_cls_host *ihost = shost->shost_data;
|
|
struct iscsi_scan_data scan_data;
|
|
|
|
scan_data.channel = 0;
|
|
scan_data.id = SCAN_WILD_CARD;
|
|
scan_data.lun = SCAN_WILD_CARD;
|
|
|
|
iscsi_user_scan_session(&session->dev, &scan_data);
|
|
atomic_dec(&ihost->nr_scans);
|
|
}
|
|
|
|
/**
|
|
* iscsi_block_scsi_eh - block scsi eh until session state has transistioned
|
|
* @cmd: scsi cmd passed to scsi eh handler
|
|
*
|
|
* If the session is down this function will wait for the recovery
|
|
* timer to fire or for the session to be logged back in. If the
|
|
* recovery timer fires then FAST_IO_FAIL is returned. The caller
|
|
* should pass this error value to the scsi eh.
|
|
*/
|
|
int iscsi_block_scsi_eh(struct scsi_cmnd *cmd)
|
|
{
|
|
struct iscsi_cls_session *session =
|
|
starget_to_session(scsi_target(cmd->device));
|
|
unsigned long flags;
|
|
int ret = 0;
|
|
|
|
spin_lock_irqsave(&session->lock, flags);
|
|
while (session->state != ISCSI_SESSION_LOGGED_IN) {
|
|
if (session->state == ISCSI_SESSION_FREE) {
|
|
ret = FAST_IO_FAIL;
|
|
break;
|
|
}
|
|
spin_unlock_irqrestore(&session->lock, flags);
|
|
msleep(1000);
|
|
spin_lock_irqsave(&session->lock, flags);
|
|
}
|
|
spin_unlock_irqrestore(&session->lock, flags);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(iscsi_block_scsi_eh);
|
|
|
|
static void session_recovery_timedout(struct work_struct *work)
|
|
{
|
|
struct iscsi_cls_session *session =
|
|
container_of(work, struct iscsi_cls_session,
|
|
recovery_work.work);
|
|
unsigned long flags;
|
|
|
|
iscsi_cls_session_printk(KERN_INFO, session,
|
|
"session recovery timed out after %d secs\n",
|
|
session->recovery_tmo);
|
|
|
|
spin_lock_irqsave(&session->lock, flags);
|
|
switch (session->state) {
|
|
case ISCSI_SESSION_FAILED:
|
|
session->state = ISCSI_SESSION_FREE;
|
|
break;
|
|
case ISCSI_SESSION_LOGGED_IN:
|
|
case ISCSI_SESSION_FREE:
|
|
/* we raced with the unblock's flush */
|
|
spin_unlock_irqrestore(&session->lock, flags);
|
|
return;
|
|
}
|
|
spin_unlock_irqrestore(&session->lock, flags);
|
|
|
|
if (session->transport->session_recovery_timedout)
|
|
session->transport->session_recovery_timedout(session);
|
|
|
|
ISCSI_DBG_TRANS_SESSION(session, "Unblocking SCSI target\n");
|
|
scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
|
|
ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking SCSI target\n");
|
|
}
|
|
|
|
static void __iscsi_unblock_session(struct work_struct *work)
|
|
{
|
|
struct iscsi_cls_session *session =
|
|
container_of(work, struct iscsi_cls_session,
|
|
unblock_work);
|
|
struct Scsi_Host *shost = iscsi_session_to_shost(session);
|
|
struct iscsi_cls_host *ihost = shost->shost_data;
|
|
unsigned long flags;
|
|
|
|
ISCSI_DBG_TRANS_SESSION(session, "Unblocking session\n");
|
|
/*
|
|
* The recovery and unblock work get run from the same workqueue,
|
|
* so try to cancel it if it was going to run after this unblock.
|
|
*/
|
|
cancel_delayed_work(&session->recovery_work);
|
|
spin_lock_irqsave(&session->lock, flags);
|
|
session->state = ISCSI_SESSION_LOGGED_IN;
|
|
spin_unlock_irqrestore(&session->lock, flags);
|
|
/* start IO */
|
|
scsi_target_unblock(&session->dev, SDEV_RUNNING);
|
|
/*
|
|
* Only do kernel scanning if the driver is properly hooked into
|
|
* the async scanning code (drivers like iscsi_tcp do login and
|
|
* scanning from userspace).
|
|
*/
|
|
if (shost->hostt->scan_finished) {
|
|
if (scsi_queue_work(shost, &session->scan_work))
|
|
atomic_inc(&ihost->nr_scans);
|
|
}
|
|
ISCSI_DBG_TRANS_SESSION(session, "Completed unblocking session\n");
|
|
}
|
|
|
|
/**
|
|
* iscsi_unblock_session - set a session as logged in and start IO.
|
|
* @session: iscsi session
|
|
*
|
|
* Mark a session as ready to accept IO.
|
|
*/
|
|
void iscsi_unblock_session(struct iscsi_cls_session *session)
|
|
{
|
|
queue_work(iscsi_eh_timer_workq, &session->unblock_work);
|
|
/*
|
|
* make sure all the events have completed before tell the driver
|
|
* it is safe
|
|
*/
|
|
flush_workqueue(iscsi_eh_timer_workq);
|
|
}
|
|
EXPORT_SYMBOL_GPL(iscsi_unblock_session);
|
|
|
|
static void __iscsi_block_session(struct work_struct *work)
|
|
{
|
|
struct iscsi_cls_session *session =
|
|
container_of(work, struct iscsi_cls_session,
|
|
block_work);
|
|
unsigned long flags;
|
|
|
|
ISCSI_DBG_TRANS_SESSION(session, "Blocking session\n");
|
|
spin_lock_irqsave(&session->lock, flags);
|
|
session->state = ISCSI_SESSION_FAILED;
|
|
spin_unlock_irqrestore(&session->lock, flags);
|
|
scsi_target_block(&session->dev);
|
|
ISCSI_DBG_TRANS_SESSION(session, "Completed SCSI target blocking\n");
|
|
if (session->recovery_tmo >= 0)
|
|
queue_delayed_work(iscsi_eh_timer_workq,
|
|
&session->recovery_work,
|
|
session->recovery_tmo * HZ);
|
|
}
|
|
|
|
void iscsi_block_session(struct iscsi_cls_session *session)
|
|
{
|
|
queue_work(iscsi_eh_timer_workq, &session->block_work);
|
|
}
|
|
EXPORT_SYMBOL_GPL(iscsi_block_session);
|
|
|
|
static void __iscsi_unbind_session(struct work_struct *work)
|
|
{
|
|
struct iscsi_cls_session *session =
|
|
container_of(work, struct iscsi_cls_session,
|
|
unbind_work);
|
|
struct Scsi_Host *shost = iscsi_session_to_shost(session);
|
|
struct iscsi_cls_host *ihost = shost->shost_data;
|
|
unsigned long flags;
|
|
unsigned int target_id;
|
|
|
|
ISCSI_DBG_TRANS_SESSION(session, "Unbinding session\n");
|
|
|
|
/* Prevent new scans and make sure scanning is not in progress */
|
|
mutex_lock(&ihost->mutex);
|
|
spin_lock_irqsave(&session->lock, flags);
|
|
if (session->target_id == ISCSI_MAX_TARGET) {
|
|
spin_unlock_irqrestore(&session->lock, flags);
|
|
mutex_unlock(&ihost->mutex);
|
|
return;
|
|
}
|
|
|
|
target_id = session->target_id;
|
|
session->target_id = ISCSI_MAX_TARGET;
|
|
spin_unlock_irqrestore(&session->lock, flags);
|
|
mutex_unlock(&ihost->mutex);
|
|
|
|
if (session->ida_used)
|
|
ida_simple_remove(&iscsi_sess_ida, target_id);
|
|
|
|
scsi_remove_target(&session->dev);
|
|
iscsi_session_event(session, ISCSI_KEVENT_UNBIND_SESSION);
|
|
ISCSI_DBG_TRANS_SESSION(session, "Completed target removal\n");
|
|
}
|
|
|
|
struct iscsi_cls_session *
|
|
iscsi_alloc_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
|
|
int dd_size)
|
|
{
|
|
struct iscsi_cls_session *session;
|
|
|
|
session = kzalloc(sizeof(*session) + dd_size,
|
|
GFP_KERNEL);
|
|
if (!session)
|
|
return NULL;
|
|
|
|
session->transport = transport;
|
|
session->creator = -1;
|
|
session->recovery_tmo = 120;
|
|
session->state = ISCSI_SESSION_FREE;
|
|
INIT_DELAYED_WORK(&session->recovery_work, session_recovery_timedout);
|
|
INIT_LIST_HEAD(&session->sess_list);
|
|
INIT_WORK(&session->unblock_work, __iscsi_unblock_session);
|
|
INIT_WORK(&session->block_work, __iscsi_block_session);
|
|
INIT_WORK(&session->unbind_work, __iscsi_unbind_session);
|
|
INIT_WORK(&session->scan_work, iscsi_scan_session);
|
|
spin_lock_init(&session->lock);
|
|
|
|
/* this is released in the dev's release function */
|
|
scsi_host_get(shost);
|
|
session->dev.parent = &shost->shost_gendev;
|
|
session->dev.release = iscsi_session_release;
|
|
device_initialize(&session->dev);
|
|
if (dd_size)
|
|
session->dd_data = &session[1];
|
|
|
|
ISCSI_DBG_TRANS_SESSION(session, "Completed session allocation\n");
|
|
return session;
|
|
}
|
|
EXPORT_SYMBOL_GPL(iscsi_alloc_session);
|
|
|
|
int iscsi_add_session(struct iscsi_cls_session *session, unsigned int target_id)
|
|
{
|
|
struct Scsi_Host *shost = iscsi_session_to_shost(session);
|
|
struct iscsi_cls_host *ihost;
|
|
unsigned long flags;
|
|
int id = 0;
|
|
int err;
|
|
|
|
ihost = shost->shost_data;
|
|
session->sid = atomic_add_return(1, &iscsi_session_nr);
|
|
|
|
if (target_id == ISCSI_MAX_TARGET) {
|
|
id = ida_simple_get(&iscsi_sess_ida, 0, 0, GFP_KERNEL);
|
|
|
|
if (id < 0) {
|
|
iscsi_cls_session_printk(KERN_ERR, session,
|
|
"Failure in Target ID Allocation\n");
|
|
return id;
|
|
}
|
|
session->target_id = (unsigned int)id;
|
|
session->ida_used = true;
|
|
} else
|
|
session->target_id = target_id;
|
|
|
|
dev_set_name(&session->dev, "session%u", session->sid);
|
|
err = device_add(&session->dev);
|
|
if (err) {
|
|
iscsi_cls_session_printk(KERN_ERR, session,
|
|
"could not register session's dev\n");
|
|
goto release_ida;
|
|
}
|
|
transport_register_device(&session->dev);
|
|
|
|
spin_lock_irqsave(&sesslock, flags);
|
|
list_add(&session->sess_list, &sesslist);
|
|
spin_unlock_irqrestore(&sesslock, flags);
|
|
|
|
iscsi_session_event(session, ISCSI_KEVENT_CREATE_SESSION);
|
|
ISCSI_DBG_TRANS_SESSION(session, "Completed session adding\n");
|
|
return 0;
|
|
|
|
release_ida:
|
|
if (session->ida_used)
|
|
ida_simple_remove(&iscsi_sess_ida, session->target_id);
|
|
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL_GPL(iscsi_add_session);
|
|
|
|
/**
|
|
* iscsi_create_session - create iscsi class session
|
|
* @shost: scsi host
|
|
* @transport: iscsi transport
|
|
* @dd_size: private driver data size
|
|
* @target_id: which target
|
|
*
|
|
* This can be called from a LLD or iscsi_transport.
|
|
*/
|
|
struct iscsi_cls_session *
|
|
iscsi_create_session(struct Scsi_Host *shost, struct iscsi_transport *transport,
|
|
int dd_size, unsigned int target_id)
|
|
{
|
|
struct iscsi_cls_session *session;
|
|
|
|
session = iscsi_alloc_session(shost, transport, dd_size);
|
|
if (!session)
|
|
return NULL;
|
|
|
|
if (iscsi_add_session(session, target_id)) {
|
|
iscsi_free_session(session);
|
|
return NULL;
|
|
}
|
|
return session;
|
|
}
|
|
EXPORT_SYMBOL_GPL(iscsi_create_session);
|
|
|
|
static void iscsi_conn_release(struct device *dev)
|
|
{
|
|
struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev);
|
|
struct device *parent = conn->dev.parent;
|
|
|
|
ISCSI_DBG_TRANS_CONN(conn, "Releasing conn\n");
|
|
kfree(conn);
|
|
put_device(parent);
|
|
}
|
|
|
|
static int iscsi_is_conn_dev(const struct device *dev)
|
|
{
|
|
return dev->release == iscsi_conn_release;
|
|
}
|
|
|
|
static int iscsi_iter_destroy_conn_fn(struct device *dev, void *data)
|
|
{
|
|
if (!iscsi_is_conn_dev(dev))
|
|
return 0;
|
|
return iscsi_destroy_conn(iscsi_dev_to_conn(dev));
|
|
}
|
|
|
|
void iscsi_remove_session(struct iscsi_cls_session *session)
|
|
{
|
|
struct Scsi_Host *shost = iscsi_session_to_shost(session);
|
|
unsigned long flags;
|
|
int err;
|
|
|
|
ISCSI_DBG_TRANS_SESSION(session, "Removing session\n");
|
|
|
|
spin_lock_irqsave(&sesslock, flags);
|
|
list_del(&session->sess_list);
|
|
spin_unlock_irqrestore(&sesslock, flags);
|
|
|
|
/* make sure there are no blocks/unblocks queued */
|
|
flush_workqueue(iscsi_eh_timer_workq);
|
|
/* make sure the timedout callout is not running */
|
|
if (!cancel_delayed_work(&session->recovery_work))
|
|
flush_workqueue(iscsi_eh_timer_workq);
|
|
/*
|
|
* If we are blocked let commands flow again. The lld or iscsi
|
|
* layer should set up the queuecommand to fail commands.
|
|
* We assume that LLD will not be calling block/unblock while
|
|
* removing the session.
|
|
*/
|
|
spin_lock_irqsave(&session->lock, flags);
|
|
session->state = ISCSI_SESSION_FREE;
|
|
spin_unlock_irqrestore(&session->lock, flags);
|
|
|
|
scsi_target_unblock(&session->dev, SDEV_TRANSPORT_OFFLINE);
|
|
/* flush running scans then delete devices */
|
|
scsi_flush_work(shost);
|
|
__iscsi_unbind_session(&session->unbind_work);
|
|
|
|
/* hw iscsi may not have removed all connections from session */
|
|
err = device_for_each_child(&session->dev, NULL,
|
|
iscsi_iter_destroy_conn_fn);
|
|
if (err)
|
|
iscsi_cls_session_printk(KERN_ERR, session,
|
|
"Could not delete all connections "
|
|
"for session. Error %d.\n", err);
|
|
|
|
transport_unregister_device(&session->dev);
|
|
|
|
ISCSI_DBG_TRANS_SESSION(session, "Completing session removal\n");
|
|
device_del(&session->dev);
|
|
}
|
|
EXPORT_SYMBOL_GPL(iscsi_remove_session);
|
|
|
|
void iscsi_free_session(struct iscsi_cls_session *session)
|
|
{
|
|
ISCSI_DBG_TRANS_SESSION(session, "Freeing session\n");
|
|
iscsi_session_event(session, ISCSI_KEVENT_DESTROY_SESSION);
|
|
put_device(&session->dev);
|
|
}
|
|
EXPORT_SYMBOL_GPL(iscsi_free_session);
|
|
|
|
/**
|
|
* iscsi_destroy_session - destroy iscsi session
|
|
* @session: iscsi_session
|
|
*
|
|
* Can be called by a LLD or iscsi_transport. There must not be
|
|
* any running connections.
|
|
*/
|
|
int iscsi_destroy_session(struct iscsi_cls_session *session)
|
|
{
|
|
iscsi_remove_session(session);
|
|
ISCSI_DBG_TRANS_SESSION(session, "Completing session destruction\n");
|
|
iscsi_free_session(session);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(iscsi_destroy_session);
|
|
|
|
/**
|
|
* iscsi_create_conn - create iscsi class connection
|
|
* @session: iscsi cls session
|
|
* @dd_size: private driver data size
|
|
* @cid: connection id
|
|
*
|
|
* This can be called from a LLD or iscsi_transport. The connection
|
|
* is child of the session so cid must be unique for all connections
|
|
* on the session.
|
|
*
|
|
* Since we do not support MCS, cid will normally be zero. In some cases
|
|
* for software iscsi we could be trying to preallocate a connection struct
|
|
* in which case there could be two connection structs and cid would be
|
|
* non-zero.
|
|
*/
|
|
struct iscsi_cls_conn *
|
|
iscsi_create_conn(struct iscsi_cls_session *session, int dd_size, uint32_t cid)
|
|
{
|
|
struct iscsi_transport *transport = session->transport;
|
|
struct iscsi_cls_conn *conn;
|
|
unsigned long flags;
|
|
int err;
|
|
|
|
conn = kzalloc(sizeof(*conn) + dd_size, GFP_KERNEL);
|
|
if (!conn)
|
|
return NULL;
|
|
if (dd_size)
|
|
conn->dd_data = &conn[1];
|
|
|
|
mutex_init(&conn->ep_mutex);
|
|
INIT_LIST_HEAD(&conn->conn_list);
|
|
conn->transport = transport;
|
|
conn->cid = cid;
|
|
|
|
/* this is released in the dev's release function */
|
|
if (!get_device(&session->dev))
|
|
goto free_conn;
|
|
|
|
dev_set_name(&conn->dev, "connection%d:%u", session->sid, cid);
|
|
conn->dev.parent = &session->dev;
|
|
conn->dev.release = iscsi_conn_release;
|
|
err = device_register(&conn->dev);
|
|
if (err) {
|
|
iscsi_cls_session_printk(KERN_ERR, session, "could not "
|
|
"register connection's dev\n");
|
|
goto release_parent_ref;
|
|
}
|
|
transport_register_device(&conn->dev);
|
|
|
|
spin_lock_irqsave(&connlock, flags);
|
|
list_add(&conn->conn_list, &connlist);
|
|
spin_unlock_irqrestore(&connlock, flags);
|
|
|
|
ISCSI_DBG_TRANS_CONN(conn, "Completed conn creation\n");
|
|
return conn;
|
|
|
|
release_parent_ref:
|
|
put_device(&session->dev);
|
|
free_conn:
|
|
kfree(conn);
|
|
return NULL;
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(iscsi_create_conn);
|
|
|
|
/**
|
|
* iscsi_destroy_conn - destroy iscsi class connection
|
|
* @conn: iscsi cls session
|
|
*
|
|
* This can be called from a LLD or iscsi_transport.
|
|
*/
|
|
int iscsi_destroy_conn(struct iscsi_cls_conn *conn)
|
|
{
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&connlock, flags);
|
|
list_del(&conn->conn_list);
|
|
spin_unlock_irqrestore(&connlock, flags);
|
|
|
|
transport_unregister_device(&conn->dev);
|
|
ISCSI_DBG_TRANS_CONN(conn, "Completing conn destruction\n");
|
|
device_unregister(&conn->dev);
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(iscsi_destroy_conn);
|
|
|
|
/*
|
|
* iscsi interface functions
|
|
*/
|
|
static struct iscsi_internal *
|
|
iscsi_if_transport_lookup(struct iscsi_transport *tt)
|
|
{
|
|
struct iscsi_internal *priv;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&iscsi_transport_lock, flags);
|
|
list_for_each_entry(priv, &iscsi_transports, list) {
|
|
if (tt == priv->iscsi_transport) {
|
|
spin_unlock_irqrestore(&iscsi_transport_lock, flags);
|
|
return priv;
|
|
}
|
|
}
|
|
spin_unlock_irqrestore(&iscsi_transport_lock, flags);
|
|
return NULL;
|
|
}
|
|
|
|
static int
|
|
iscsi_multicast_skb(struct sk_buff *skb, uint32_t group, gfp_t gfp)
|
|
{
|
|
return nlmsg_multicast(nls, skb, 0, group, gfp);
|
|
}
|
|
|
|
int iscsi_recv_pdu(struct iscsi_cls_conn *conn, struct iscsi_hdr *hdr,
|
|
char *data, uint32_t data_size)
|
|
{
|
|
struct nlmsghdr *nlh;
|
|
struct sk_buff *skb;
|
|
struct iscsi_uevent *ev;
|
|
char *pdu;
|
|
struct iscsi_internal *priv;
|
|
int len = nlmsg_total_size(sizeof(*ev) + sizeof(struct iscsi_hdr) +
|
|
data_size);
|
|
|
|
priv = iscsi_if_transport_lookup(conn->transport);
|
|
if (!priv)
|
|
return -EINVAL;
|
|
|
|
skb = alloc_skb(len, GFP_ATOMIC);
|
|
if (!skb) {
|
|
iscsi_conn_error_event(conn, ISCSI_ERR_CONN_FAILED);
|
|
iscsi_cls_conn_printk(KERN_ERR, conn, "can not deliver "
|
|
"control PDU: OOM\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
|
|
ev = nlmsg_data(nlh);
|
|
memset(ev, 0, sizeof(*ev));
|
|
ev->transport_handle = iscsi_handle(conn->transport);
|
|
ev->type = ISCSI_KEVENT_RECV_PDU;
|
|
ev->r.recv_req.cid = conn->cid;
|
|
ev->r.recv_req.sid = iscsi_conn_get_sid(conn);
|
|
pdu = (char*)ev + sizeof(*ev);
|
|
memcpy(pdu, hdr, sizeof(struct iscsi_hdr));
|
|
memcpy(pdu + sizeof(struct iscsi_hdr), data, data_size);
|
|
|
|
return iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
|
|
}
|
|
EXPORT_SYMBOL_GPL(iscsi_recv_pdu);
|
|
|
|
int iscsi_offload_mesg(struct Scsi_Host *shost,
|
|
struct iscsi_transport *transport, uint32_t type,
|
|
char *data, uint16_t data_size)
|
|
{
|
|
struct nlmsghdr *nlh;
|
|
struct sk_buff *skb;
|
|
struct iscsi_uevent *ev;
|
|
int len = nlmsg_total_size(sizeof(*ev) + data_size);
|
|
|
|
skb = alloc_skb(len, GFP_ATOMIC);
|
|
if (!skb) {
|
|
printk(KERN_ERR "can not deliver iscsi offload message:OOM\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
|
|
ev = nlmsg_data(nlh);
|
|
memset(ev, 0, sizeof(*ev));
|
|
ev->type = type;
|
|
ev->transport_handle = iscsi_handle(transport);
|
|
switch (type) {
|
|
case ISCSI_KEVENT_PATH_REQ:
|
|
ev->r.req_path.host_no = shost->host_no;
|
|
break;
|
|
case ISCSI_KEVENT_IF_DOWN:
|
|
ev->r.notify_if_down.host_no = shost->host_no;
|
|
break;
|
|
}
|
|
|
|
memcpy((char *)ev + sizeof(*ev), data, data_size);
|
|
|
|
return iscsi_multicast_skb(skb, ISCSI_NL_GRP_UIP, GFP_ATOMIC);
|
|
}
|
|
EXPORT_SYMBOL_GPL(iscsi_offload_mesg);
|
|
|
|
void iscsi_conn_error_event(struct iscsi_cls_conn *conn, enum iscsi_err error)
|
|
{
|
|
struct nlmsghdr *nlh;
|
|
struct sk_buff *skb;
|
|
struct iscsi_uevent *ev;
|
|
struct iscsi_internal *priv;
|
|
int len = nlmsg_total_size(sizeof(*ev));
|
|
|
|
priv = iscsi_if_transport_lookup(conn->transport);
|
|
if (!priv)
|
|
return;
|
|
|
|
skb = alloc_skb(len, GFP_ATOMIC);
|
|
if (!skb) {
|
|
iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
|
|
"conn error (%d)\n", error);
|
|
return;
|
|
}
|
|
|
|
nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
|
|
ev = nlmsg_data(nlh);
|
|
ev->transport_handle = iscsi_handle(conn->transport);
|
|
ev->type = ISCSI_KEVENT_CONN_ERROR;
|
|
ev->r.connerror.error = error;
|
|
ev->r.connerror.cid = conn->cid;
|
|
ev->r.connerror.sid = iscsi_conn_get_sid(conn);
|
|
|
|
iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
|
|
|
|
iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn error (%d)\n",
|
|
error);
|
|
}
|
|
EXPORT_SYMBOL_GPL(iscsi_conn_error_event);
|
|
|
|
void iscsi_conn_login_event(struct iscsi_cls_conn *conn,
|
|
enum iscsi_conn_state state)
|
|
{
|
|
struct nlmsghdr *nlh;
|
|
struct sk_buff *skb;
|
|
struct iscsi_uevent *ev;
|
|
struct iscsi_internal *priv;
|
|
int len = nlmsg_total_size(sizeof(*ev));
|
|
|
|
priv = iscsi_if_transport_lookup(conn->transport);
|
|
if (!priv)
|
|
return;
|
|
|
|
skb = alloc_skb(len, GFP_ATOMIC);
|
|
if (!skb) {
|
|
iscsi_cls_conn_printk(KERN_ERR, conn, "gracefully ignored "
|
|
"conn login (%d)\n", state);
|
|
return;
|
|
}
|
|
|
|
nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
|
|
ev = nlmsg_data(nlh);
|
|
ev->transport_handle = iscsi_handle(conn->transport);
|
|
ev->type = ISCSI_KEVENT_CONN_LOGIN_STATE;
|
|
ev->r.conn_login.state = state;
|
|
ev->r.conn_login.cid = conn->cid;
|
|
ev->r.conn_login.sid = iscsi_conn_get_sid(conn);
|
|
iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_ATOMIC);
|
|
|
|
iscsi_cls_conn_printk(KERN_INFO, conn, "detected conn login (%d)\n",
|
|
state);
|
|
}
|
|
EXPORT_SYMBOL_GPL(iscsi_conn_login_event);
|
|
|
|
void iscsi_post_host_event(uint32_t host_no, struct iscsi_transport *transport,
|
|
enum iscsi_host_event_code code, uint32_t data_size,
|
|
uint8_t *data)
|
|
{
|
|
struct nlmsghdr *nlh;
|
|
struct sk_buff *skb;
|
|
struct iscsi_uevent *ev;
|
|
int len = nlmsg_total_size(sizeof(*ev) + data_size);
|
|
|
|
skb = alloc_skb(len, GFP_NOIO);
|
|
if (!skb) {
|
|
printk(KERN_ERR "gracefully ignored host event (%d):%d OOM\n",
|
|
host_no, code);
|
|
return;
|
|
}
|
|
|
|
nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
|
|
ev = nlmsg_data(nlh);
|
|
ev->transport_handle = iscsi_handle(transport);
|
|
ev->type = ISCSI_KEVENT_HOST_EVENT;
|
|
ev->r.host_event.host_no = host_no;
|
|
ev->r.host_event.code = code;
|
|
ev->r.host_event.data_size = data_size;
|
|
|
|
if (data_size)
|
|
memcpy((char *)ev + sizeof(*ev), data, data_size);
|
|
|
|
iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
|
|
}
|
|
EXPORT_SYMBOL_GPL(iscsi_post_host_event);
|
|
|
|
void iscsi_ping_comp_event(uint32_t host_no, struct iscsi_transport *transport,
|
|
uint32_t status, uint32_t pid, uint32_t data_size,
|
|
uint8_t *data)
|
|
{
|
|
struct nlmsghdr *nlh;
|
|
struct sk_buff *skb;
|
|
struct iscsi_uevent *ev;
|
|
int len = nlmsg_total_size(sizeof(*ev) + data_size);
|
|
|
|
skb = alloc_skb(len, GFP_NOIO);
|
|
if (!skb) {
|
|
printk(KERN_ERR "gracefully ignored ping comp: OOM\n");
|
|
return;
|
|
}
|
|
|
|
nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
|
|
ev = nlmsg_data(nlh);
|
|
ev->transport_handle = iscsi_handle(transport);
|
|
ev->type = ISCSI_KEVENT_PING_COMP;
|
|
ev->r.ping_comp.host_no = host_no;
|
|
ev->r.ping_comp.status = status;
|
|
ev->r.ping_comp.pid = pid;
|
|
ev->r.ping_comp.data_size = data_size;
|
|
memcpy((char *)ev + sizeof(*ev), data, data_size);
|
|
|
|
iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_NOIO);
|
|
}
|
|
EXPORT_SYMBOL_GPL(iscsi_ping_comp_event);
|
|
|
|
static int
|
|
iscsi_if_send_reply(uint32_t group, int seq, int type, int done, int multi,
|
|
void *payload, int size)
|
|
{
|
|
struct sk_buff *skb;
|
|
struct nlmsghdr *nlh;
|
|
int len = nlmsg_total_size(size);
|
|
int flags = multi ? NLM_F_MULTI : 0;
|
|
int t = done ? NLMSG_DONE : type;
|
|
|
|
skb = alloc_skb(len, GFP_ATOMIC);
|
|
if (!skb) {
|
|
printk(KERN_ERR "Could not allocate skb to send reply.\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
nlh = __nlmsg_put(skb, 0, 0, t, (len - sizeof(*nlh)), 0);
|
|
nlh->nlmsg_flags = flags;
|
|
memcpy(nlmsg_data(nlh), payload, size);
|
|
return iscsi_multicast_skb(skb, group, GFP_ATOMIC);
|
|
}
|
|
|
|
static int
|
|
iscsi_if_get_stats(struct iscsi_transport *transport, struct nlmsghdr *nlh)
|
|
{
|
|
struct iscsi_uevent *ev = nlmsg_data(nlh);
|
|
struct iscsi_stats *stats;
|
|
struct sk_buff *skbstat;
|
|
struct iscsi_cls_conn *conn;
|
|
struct nlmsghdr *nlhstat;
|
|
struct iscsi_uevent *evstat;
|
|
struct iscsi_internal *priv;
|
|
int len = nlmsg_total_size(sizeof(*ev) +
|
|
sizeof(struct iscsi_stats) +
|
|
sizeof(struct iscsi_stats_custom) *
|
|
ISCSI_STATS_CUSTOM_MAX);
|
|
int err = 0;
|
|
|
|
priv = iscsi_if_transport_lookup(transport);
|
|
if (!priv)
|
|
return -EINVAL;
|
|
|
|
conn = iscsi_conn_lookup(ev->u.get_stats.sid, ev->u.get_stats.cid);
|
|
if (!conn)
|
|
return -EEXIST;
|
|
|
|
do {
|
|
int actual_size;
|
|
|
|
skbstat = alloc_skb(len, GFP_ATOMIC);
|
|
if (!skbstat) {
|
|
iscsi_cls_conn_printk(KERN_ERR, conn, "can not "
|
|
"deliver stats: OOM\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
nlhstat = __nlmsg_put(skbstat, 0, 0, 0,
|
|
(len - sizeof(*nlhstat)), 0);
|
|
evstat = nlmsg_data(nlhstat);
|
|
memset(evstat, 0, sizeof(*evstat));
|
|
evstat->transport_handle = iscsi_handle(conn->transport);
|
|
evstat->type = nlh->nlmsg_type;
|
|
evstat->u.get_stats.cid =
|
|
ev->u.get_stats.cid;
|
|
evstat->u.get_stats.sid =
|
|
ev->u.get_stats.sid;
|
|
stats = (struct iscsi_stats *)
|
|
((char*)evstat + sizeof(*evstat));
|
|
memset(stats, 0, sizeof(*stats));
|
|
|
|
transport->get_stats(conn, stats);
|
|
actual_size = nlmsg_total_size(sizeof(struct iscsi_uevent) +
|
|
sizeof(struct iscsi_stats) +
|
|
sizeof(struct iscsi_stats_custom) *
|
|
stats->custom_length);
|
|
actual_size -= sizeof(*nlhstat);
|
|
actual_size = nlmsg_msg_size(actual_size);
|
|
skb_trim(skbstat, NLMSG_ALIGN(actual_size));
|
|
nlhstat->nlmsg_len = actual_size;
|
|
|
|
err = iscsi_multicast_skb(skbstat, ISCSI_NL_GRP_ISCSID,
|
|
GFP_ATOMIC);
|
|
} while (err < 0 && err != -ECONNREFUSED);
|
|
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* iscsi_session_event - send session destr. completion event
|
|
* @session: iscsi class session
|
|
* @event: type of event
|
|
*/
|
|
int iscsi_session_event(struct iscsi_cls_session *session,
|
|
enum iscsi_uevent_e event)
|
|
{
|
|
struct iscsi_internal *priv;
|
|
struct Scsi_Host *shost;
|
|
struct iscsi_uevent *ev;
|
|
struct sk_buff *skb;
|
|
struct nlmsghdr *nlh;
|
|
int rc, len = nlmsg_total_size(sizeof(*ev));
|
|
|
|
priv = iscsi_if_transport_lookup(session->transport);
|
|
if (!priv)
|
|
return -EINVAL;
|
|
shost = iscsi_session_to_shost(session);
|
|
|
|
skb = alloc_skb(len, GFP_KERNEL);
|
|
if (!skb) {
|
|
iscsi_cls_session_printk(KERN_ERR, session,
|
|
"Cannot notify userspace of session "
|
|
"event %u\n", event);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
nlh = __nlmsg_put(skb, 0, 0, 0, (len - sizeof(*nlh)), 0);
|
|
ev = nlmsg_data(nlh);
|
|
ev->transport_handle = iscsi_handle(session->transport);
|
|
|
|
ev->type = event;
|
|
switch (event) {
|
|
case ISCSI_KEVENT_DESTROY_SESSION:
|
|
ev->r.d_session.host_no = shost->host_no;
|
|
ev->r.d_session.sid = session->sid;
|
|
break;
|
|
case ISCSI_KEVENT_CREATE_SESSION:
|
|
ev->r.c_session_ret.host_no = shost->host_no;
|
|
ev->r.c_session_ret.sid = session->sid;
|
|
break;
|
|
case ISCSI_KEVENT_UNBIND_SESSION:
|
|
ev->r.unbind_session.host_no = shost->host_no;
|
|
ev->r.unbind_session.sid = session->sid;
|
|
break;
|
|
default:
|
|
iscsi_cls_session_printk(KERN_ERR, session, "Invalid event "
|
|
"%u.\n", event);
|
|
kfree_skb(skb);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* this will occur if the daemon is not up, so we just warn
|
|
* the user and when the daemon is restarted it will handle it
|
|
*/
|
|
rc = iscsi_multicast_skb(skb, ISCSI_NL_GRP_ISCSID, GFP_KERNEL);
|
|
if (rc == -ESRCH)
|
|
iscsi_cls_session_printk(KERN_ERR, session,
|
|
"Cannot notify userspace of session "
|
|
"event %u. Check iscsi daemon\n",
|
|
event);
|
|
|
|
ISCSI_DBG_TRANS_SESSION(session, "Completed handling event %d rc %d\n",
|
|
event, rc);
|
|
return rc;
|
|
}
|
|
EXPORT_SYMBOL_GPL(iscsi_session_event);
|
|
|
|
static int
|
|
iscsi_if_create_session(struct iscsi_internal *priv, struct iscsi_endpoint *ep,
|
|
struct iscsi_uevent *ev, pid_t pid,
|
|
uint32_t initial_cmdsn, uint16_t cmds_max,
|
|
uint16_t queue_depth)
|
|
{
|
|
struct iscsi_transport *transport = priv->iscsi_transport;
|
|
struct iscsi_cls_session *session;
|
|
struct Scsi_Host *shost;
|
|
|
|
session = transport->create_session(ep, cmds_max, queue_depth,
|
|
initial_cmdsn);
|
|
if (!session)
|
|
return -ENOMEM;
|
|
|
|
session->creator = pid;
|
|
shost = iscsi_session_to_shost(session);
|
|
ev->r.c_session_ret.host_no = shost->host_no;
|
|
ev->r.c_session_ret.sid = session->sid;
|
|
ISCSI_DBG_TRANS_SESSION(session,
|
|
"Completed creating transport session\n");
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
iscsi_if_create_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
|
|
{
|
|
struct iscsi_cls_conn *conn;
|
|
struct iscsi_cls_session *session;
|
|
|
|
session = iscsi_session_lookup(ev->u.c_conn.sid);
|
|
if (!session) {
|
|
printk(KERN_ERR "iscsi: invalid session %d.\n",
|
|
ev->u.c_conn.sid);
|
|
return -EINVAL;
|
|
}
|
|
|
|
conn = transport->create_conn(session, ev->u.c_conn.cid);
|
|
if (!conn) {
|
|
iscsi_cls_session_printk(KERN_ERR, session,
|
|
"couldn't create a new connection.");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
ev->r.c_conn_ret.sid = session->sid;
|
|
ev->r.c_conn_ret.cid = conn->cid;
|
|
|
|
ISCSI_DBG_TRANS_CONN(conn, "Completed creating transport conn\n");
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
iscsi_if_destroy_conn(struct iscsi_transport *transport, struct iscsi_uevent *ev)
|
|
{
|
|
struct iscsi_cls_conn *conn;
|
|
|
|
conn = iscsi_conn_lookup(ev->u.d_conn.sid, ev->u.d_conn.cid);
|
|
if (!conn)
|
|
return -EINVAL;
|
|
|
|
ISCSI_DBG_TRANS_CONN(conn, "Destroying transport conn\n");
|
|
if (transport->destroy_conn)
|
|
transport->destroy_conn(conn);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
iscsi_set_param(struct iscsi_transport *transport, struct iscsi_uevent *ev)
|
|
{
|
|
char *data = (char*)ev + sizeof(*ev);
|
|
struct iscsi_cls_conn *conn;
|
|
struct iscsi_cls_session *session;
|
|
int err = 0, value = 0;
|
|
|
|
session = iscsi_session_lookup(ev->u.set_param.sid);
|
|
conn = iscsi_conn_lookup(ev->u.set_param.sid, ev->u.set_param.cid);
|
|
if (!conn || !session)
|
|
return -EINVAL;
|
|
|
|
switch (ev->u.set_param.param) {
|
|
case ISCSI_PARAM_SESS_RECOVERY_TMO:
|
|
sscanf(data, "%d", &value);
|
|
session->recovery_tmo = value;
|
|
break;
|
|
default:
|
|
err = transport->set_param(conn, ev->u.set_param.param,
|
|
data, ev->u.set_param.len);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static int iscsi_if_ep_connect(struct iscsi_transport *transport,
|
|
struct iscsi_uevent *ev, int msg_type)
|
|
{
|
|
struct iscsi_endpoint *ep;
|
|
struct sockaddr *dst_addr;
|
|
struct Scsi_Host *shost = NULL;
|
|
int non_blocking, err = 0;
|
|
|
|
if (!transport->ep_connect)
|
|
return -EINVAL;
|
|
|
|
if (msg_type == ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST) {
|
|
shost = scsi_host_lookup(ev->u.ep_connect_through_host.host_no);
|
|
if (!shost) {
|
|
printk(KERN_ERR "ep connect failed. Could not find "
|
|
"host no %u\n",
|
|
ev->u.ep_connect_through_host.host_no);
|
|
return -ENODEV;
|
|
}
|
|
non_blocking = ev->u.ep_connect_through_host.non_blocking;
|
|
} else
|
|
non_blocking = ev->u.ep_connect.non_blocking;
|
|
|
|
dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
|
|
ep = transport->ep_connect(shost, dst_addr, non_blocking);
|
|
if (IS_ERR(ep)) {
|
|
err = PTR_ERR(ep);
|
|
goto release_host;
|
|
}
|
|
|
|
ev->r.ep_connect_ret.handle = ep->id;
|
|
release_host:
|
|
if (shost)
|
|
scsi_host_put(shost);
|
|
return err;
|
|
}
|
|
|
|
static int iscsi_if_ep_disconnect(struct iscsi_transport *transport,
|
|
u64 ep_handle)
|
|
{
|
|
struct iscsi_cls_conn *conn;
|
|
struct iscsi_endpoint *ep;
|
|
|
|
if (!transport->ep_disconnect)
|
|
return -EINVAL;
|
|
|
|
ep = iscsi_lookup_endpoint(ep_handle);
|
|
if (!ep)
|
|
return -EINVAL;
|
|
conn = ep->conn;
|
|
if (conn) {
|
|
mutex_lock(&conn->ep_mutex);
|
|
conn->ep = NULL;
|
|
mutex_unlock(&conn->ep_mutex);
|
|
}
|
|
|
|
transport->ep_disconnect(ep);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
iscsi_if_transport_ep(struct iscsi_transport *transport,
|
|
struct iscsi_uevent *ev, int msg_type)
|
|
{
|
|
struct iscsi_endpoint *ep;
|
|
int rc = 0;
|
|
|
|
switch (msg_type) {
|
|
case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
|
|
case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
|
|
rc = iscsi_if_ep_connect(transport, ev, msg_type);
|
|
break;
|
|
case ISCSI_UEVENT_TRANSPORT_EP_POLL:
|
|
if (!transport->ep_poll)
|
|
return -EINVAL;
|
|
|
|
ep = iscsi_lookup_endpoint(ev->u.ep_poll.ep_handle);
|
|
if (!ep)
|
|
return -EINVAL;
|
|
|
|
ev->r.retcode = transport->ep_poll(ep,
|
|
ev->u.ep_poll.timeout_ms);
|
|
break;
|
|
case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
|
|
rc = iscsi_if_ep_disconnect(transport,
|
|
ev->u.ep_disconnect.ep_handle);
|
|
break;
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
static int
|
|
iscsi_tgt_dscvr(struct iscsi_transport *transport,
|
|
struct iscsi_uevent *ev)
|
|
{
|
|
struct Scsi_Host *shost;
|
|
struct sockaddr *dst_addr;
|
|
int err;
|
|
|
|
if (!transport->tgt_dscvr)
|
|
return -EINVAL;
|
|
|
|
shost = scsi_host_lookup(ev->u.tgt_dscvr.host_no);
|
|
if (!shost) {
|
|
printk(KERN_ERR "target discovery could not find host no %u\n",
|
|
ev->u.tgt_dscvr.host_no);
|
|
return -ENODEV;
|
|
}
|
|
|
|
|
|
dst_addr = (struct sockaddr *)((char*)ev + sizeof(*ev));
|
|
err = transport->tgt_dscvr(shost, ev->u.tgt_dscvr.type,
|
|
ev->u.tgt_dscvr.enable, dst_addr);
|
|
scsi_host_put(shost);
|
|
return err;
|
|
}
|
|
|
|
static int
|
|
iscsi_set_host_param(struct iscsi_transport *transport,
|
|
struct iscsi_uevent *ev)
|
|
{
|
|
char *data = (char*)ev + sizeof(*ev);
|
|
struct Scsi_Host *shost;
|
|
int err;
|
|
|
|
if (!transport->set_host_param)
|
|
return -ENOSYS;
|
|
|
|
shost = scsi_host_lookup(ev->u.set_host_param.host_no);
|
|
if (!shost) {
|
|
printk(KERN_ERR "set_host_param could not find host no %u\n",
|
|
ev->u.set_host_param.host_no);
|
|
return -ENODEV;
|
|
}
|
|
|
|
err = transport->set_host_param(shost, ev->u.set_host_param.param,
|
|
data, ev->u.set_host_param.len);
|
|
scsi_host_put(shost);
|
|
return err;
|
|
}
|
|
|
|
static int
|
|
iscsi_set_path(struct iscsi_transport *transport, struct iscsi_uevent *ev)
|
|
{
|
|
struct Scsi_Host *shost;
|
|
struct iscsi_path *params;
|
|
int err;
|
|
|
|
if (!transport->set_path)
|
|
return -ENOSYS;
|
|
|
|
shost = scsi_host_lookup(ev->u.set_path.host_no);
|
|
if (!shost) {
|
|
printk(KERN_ERR "set path could not find host no %u\n",
|
|
ev->u.set_path.host_no);
|
|
return -ENODEV;
|
|
}
|
|
|
|
params = (struct iscsi_path *)((char *)ev + sizeof(*ev));
|
|
err = transport->set_path(shost, params);
|
|
|
|
scsi_host_put(shost);
|
|
return err;
|
|
}
|
|
|
|
static int
|
|
iscsi_set_iface_params(struct iscsi_transport *transport,
|
|
struct iscsi_uevent *ev, uint32_t len)
|
|
{
|
|
char *data = (char *)ev + sizeof(*ev);
|
|
struct Scsi_Host *shost;
|
|
int err;
|
|
|
|
if (!transport->set_iface_param)
|
|
return -ENOSYS;
|
|
|
|
shost = scsi_host_lookup(ev->u.set_iface_params.host_no);
|
|
if (!shost) {
|
|
printk(KERN_ERR "set_iface_params could not find host no %u\n",
|
|
ev->u.set_iface_params.host_no);
|
|
return -ENODEV;
|
|
}
|
|
|
|
err = transport->set_iface_param(shost, data, len);
|
|
scsi_host_put(shost);
|
|
return err;
|
|
}
|
|
|
|
static int
|
|
iscsi_send_ping(struct iscsi_transport *transport, struct iscsi_uevent *ev)
|
|
{
|
|
struct Scsi_Host *shost;
|
|
struct sockaddr *dst_addr;
|
|
int err;
|
|
|
|
if (!transport->send_ping)
|
|
return -ENOSYS;
|
|
|
|
shost = scsi_host_lookup(ev->u.iscsi_ping.host_no);
|
|
if (!shost) {
|
|
printk(KERN_ERR "iscsi_ping could not find host no %u\n",
|
|
ev->u.iscsi_ping.host_no);
|
|
return -ENODEV;
|
|
}
|
|
|
|
dst_addr = (struct sockaddr *)((char *)ev + sizeof(*ev));
|
|
err = transport->send_ping(shost, ev->u.iscsi_ping.iface_num,
|
|
ev->u.iscsi_ping.iface_type,
|
|
ev->u.iscsi_ping.payload_size,
|
|
ev->u.iscsi_ping.pid,
|
|
dst_addr);
|
|
scsi_host_put(shost);
|
|
return err;
|
|
}
|
|
|
|
static int
|
|
iscsi_get_chap(struct iscsi_transport *transport, struct nlmsghdr *nlh)
|
|
{
|
|
struct iscsi_uevent *ev = nlmsg_data(nlh);
|
|
struct Scsi_Host *shost = NULL;
|
|
struct iscsi_chap_rec *chap_rec;
|
|
struct iscsi_internal *priv;
|
|
struct sk_buff *skbchap;
|
|
struct nlmsghdr *nlhchap;
|
|
struct iscsi_uevent *evchap;
|
|
uint32_t chap_buf_size;
|
|
int len, err = 0;
|
|
char *buf;
|
|
|
|
if (!transport->get_chap)
|
|
return -EINVAL;
|
|
|
|
priv = iscsi_if_transport_lookup(transport);
|
|
if (!priv)
|
|
return -EINVAL;
|
|
|
|
chap_buf_size = (ev->u.get_chap.num_entries * sizeof(*chap_rec));
|
|
len = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
|
|
|
|
shost = scsi_host_lookup(ev->u.get_chap.host_no);
|
|
if (!shost) {
|
|
printk(KERN_ERR "%s: failed. Cound not find host no %u\n",
|
|
__func__, ev->u.get_chap.host_no);
|
|
return -ENODEV;
|
|
}
|
|
|
|
do {
|
|
int actual_size;
|
|
|
|
skbchap = alloc_skb(len, GFP_KERNEL);
|
|
if (!skbchap) {
|
|
printk(KERN_ERR "can not deliver chap: OOM\n");
|
|
err = -ENOMEM;
|
|
goto exit_get_chap;
|
|
}
|
|
|
|
nlhchap = __nlmsg_put(skbchap, 0, 0, 0,
|
|
(len - sizeof(*nlhchap)), 0);
|
|
evchap = nlmsg_data(nlhchap);
|
|
memset(evchap, 0, sizeof(*evchap));
|
|
evchap->transport_handle = iscsi_handle(transport);
|
|
evchap->type = nlh->nlmsg_type;
|
|
evchap->u.get_chap.host_no = ev->u.get_chap.host_no;
|
|
evchap->u.get_chap.chap_tbl_idx = ev->u.get_chap.chap_tbl_idx;
|
|
evchap->u.get_chap.num_entries = ev->u.get_chap.num_entries;
|
|
buf = (char *) ((char *)evchap + sizeof(*evchap));
|
|
memset(buf, 0, chap_buf_size);
|
|
|
|
err = transport->get_chap(shost, ev->u.get_chap.chap_tbl_idx,
|
|
&evchap->u.get_chap.num_entries, buf);
|
|
|
|
actual_size = nlmsg_total_size(sizeof(*ev) + chap_buf_size);
|
|
skb_trim(skbchap, NLMSG_ALIGN(actual_size));
|
|
nlhchap->nlmsg_len = actual_size;
|
|
|
|
err = iscsi_multicast_skb(skbchap, ISCSI_NL_GRP_ISCSID,
|
|
GFP_KERNEL);
|
|
} while (err < 0 && err != -ECONNREFUSED);
|
|
|
|
exit_get_chap:
|
|
scsi_host_put(shost);
|
|
return err;
|
|
}
|
|
|
|
static int iscsi_delete_chap(struct iscsi_transport *transport,
|
|
struct iscsi_uevent *ev)
|
|
{
|
|
struct Scsi_Host *shost;
|
|
int err = 0;
|
|
|
|
if (!transport->delete_chap)
|
|
return -ENOSYS;
|
|
|
|
shost = scsi_host_lookup(ev->u.delete_chap.host_no);
|
|
if (!shost) {
|
|
printk(KERN_ERR "%s could not find host no %u\n",
|
|
__func__, ev->u.delete_chap.host_no);
|
|
return -ENODEV;
|
|
}
|
|
|
|
err = transport->delete_chap(shost, ev->u.delete_chap.chap_tbl_idx);
|
|
scsi_host_put(shost);
|
|
return err;
|
|
}
|
|
|
|
static const struct {
|
|
enum iscsi_discovery_parent_type value;
|
|
char *name;
|
|
} iscsi_discovery_parent_names[] = {
|
|
{ISCSI_DISC_PARENT_UNKNOWN, "Unknown" },
|
|
{ISCSI_DISC_PARENT_SENDTGT, "Sendtarget" },
|
|
{ISCSI_DISC_PARENT_ISNS, "isns" },
|
|
};
|
|
|
|
char *iscsi_get_discovery_parent_name(int parent_type)
|
|
{
|
|
int i;
|
|
char *state = "Unknown!";
|
|
|
|
for (i = 0; i < ARRAY_SIZE(iscsi_discovery_parent_names); i++) {
|
|
if (iscsi_discovery_parent_names[i].value & parent_type) {
|
|
state = iscsi_discovery_parent_names[i].name;
|
|
break;
|
|
}
|
|
}
|
|
return state;
|
|
}
|
|
EXPORT_SYMBOL_GPL(iscsi_get_discovery_parent_name);
|
|
|
|
static int iscsi_set_flashnode_param(struct iscsi_transport *transport,
|
|
struct iscsi_uevent *ev, uint32_t len)
|
|
{
|
|
char *data = (char *)ev + sizeof(*ev);
|
|
struct Scsi_Host *shost;
|
|
struct iscsi_bus_flash_session *fnode_sess;
|
|
struct iscsi_bus_flash_conn *fnode_conn;
|
|
struct device *dev;
|
|
uint32_t idx;
|
|
int err = 0;
|
|
|
|
if (!transport->set_flashnode_param) {
|
|
err = -ENOSYS;
|
|
goto exit_set_fnode;
|
|
}
|
|
|
|
shost = scsi_host_lookup(ev->u.set_flashnode.host_no);
|
|
if (!shost) {
|
|
pr_err("%s could not find host no %u\n",
|
|
__func__, ev->u.set_flashnode.host_no);
|
|
err = -ENODEV;
|
|
goto put_host;
|
|
}
|
|
|
|
idx = ev->u.set_flashnode.flashnode_idx;
|
|
fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
|
|
if (!fnode_sess) {
|
|
pr_err("%s could not find flashnode %u for host no %u\n",
|
|
__func__, idx, ev->u.set_flashnode.host_no);
|
|
err = -ENODEV;
|
|
goto put_host;
|
|
}
|
|
|
|
dev = iscsi_find_flashnode_conn(fnode_sess);
|
|
if (!dev) {
|
|
err = -ENODEV;
|
|
goto put_sess;
|
|
}
|
|
|
|
fnode_conn = iscsi_dev_to_flash_conn(dev);
|
|
err = transport->set_flashnode_param(fnode_sess, fnode_conn, data, len);
|
|
put_device(dev);
|
|
|
|
put_sess:
|
|
put_device(&fnode_sess->dev);
|
|
|
|
put_host:
|
|
scsi_host_put(shost);
|
|
|
|
exit_set_fnode:
|
|
return err;
|
|
}
|
|
|
|
static int iscsi_new_flashnode(struct iscsi_transport *transport,
|
|
struct iscsi_uevent *ev, uint32_t len)
|
|
{
|
|
char *data = (char *)ev + sizeof(*ev);
|
|
struct Scsi_Host *shost;
|
|
int index;
|
|
int err = 0;
|
|
|
|
if (!transport->new_flashnode) {
|
|
err = -ENOSYS;
|
|
goto exit_new_fnode;
|
|
}
|
|
|
|
shost = scsi_host_lookup(ev->u.new_flashnode.host_no);
|
|
if (!shost) {
|
|
pr_err("%s could not find host no %u\n",
|
|
__func__, ev->u.new_flashnode.host_no);
|
|
err = -ENODEV;
|
|
goto put_host;
|
|
}
|
|
|
|
index = transport->new_flashnode(shost, data, len);
|
|
|
|
if (index >= 0)
|
|
ev->r.new_flashnode_ret.flashnode_idx = index;
|
|
else
|
|
err = -EIO;
|
|
|
|
put_host:
|
|
scsi_host_put(shost);
|
|
|
|
exit_new_fnode:
|
|
return err;
|
|
}
|
|
|
|
static int iscsi_del_flashnode(struct iscsi_transport *transport,
|
|
struct iscsi_uevent *ev)
|
|
{
|
|
struct Scsi_Host *shost;
|
|
struct iscsi_bus_flash_session *fnode_sess;
|
|
uint32_t idx;
|
|
int err = 0;
|
|
|
|
if (!transport->del_flashnode) {
|
|
err = -ENOSYS;
|
|
goto exit_del_fnode;
|
|
}
|
|
|
|
shost = scsi_host_lookup(ev->u.del_flashnode.host_no);
|
|
if (!shost) {
|
|
pr_err("%s could not find host no %u\n",
|
|
__func__, ev->u.del_flashnode.host_no);
|
|
err = -ENODEV;
|
|
goto put_host;
|
|
}
|
|
|
|
idx = ev->u.del_flashnode.flashnode_idx;
|
|
fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
|
|
if (!fnode_sess) {
|
|
pr_err("%s could not find flashnode %u for host no %u\n",
|
|
__func__, idx, ev->u.del_flashnode.host_no);
|
|
err = -ENODEV;
|
|
goto put_host;
|
|
}
|
|
|
|
err = transport->del_flashnode(fnode_sess);
|
|
put_device(&fnode_sess->dev);
|
|
|
|
put_host:
|
|
scsi_host_put(shost);
|
|
|
|
exit_del_fnode:
|
|
return err;
|
|
}
|
|
|
|
static int iscsi_login_flashnode(struct iscsi_transport *transport,
|
|
struct iscsi_uevent *ev)
|
|
{
|
|
struct Scsi_Host *shost;
|
|
struct iscsi_bus_flash_session *fnode_sess;
|
|
struct iscsi_bus_flash_conn *fnode_conn;
|
|
struct device *dev;
|
|
uint32_t idx;
|
|
int err = 0;
|
|
|
|
if (!transport->login_flashnode) {
|
|
err = -ENOSYS;
|
|
goto exit_login_fnode;
|
|
}
|
|
|
|
shost = scsi_host_lookup(ev->u.login_flashnode.host_no);
|
|
if (!shost) {
|
|
pr_err("%s could not find host no %u\n",
|
|
__func__, ev->u.login_flashnode.host_no);
|
|
err = -ENODEV;
|
|
goto put_host;
|
|
}
|
|
|
|
idx = ev->u.login_flashnode.flashnode_idx;
|
|
fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
|
|
if (!fnode_sess) {
|
|
pr_err("%s could not find flashnode %u for host no %u\n",
|
|
__func__, idx, ev->u.login_flashnode.host_no);
|
|
err = -ENODEV;
|
|
goto put_host;
|
|
}
|
|
|
|
dev = iscsi_find_flashnode_conn(fnode_sess);
|
|
if (!dev) {
|
|
err = -ENODEV;
|
|
goto put_sess;
|
|
}
|
|
|
|
fnode_conn = iscsi_dev_to_flash_conn(dev);
|
|
err = transport->login_flashnode(fnode_sess, fnode_conn);
|
|
put_device(dev);
|
|
|
|
put_sess:
|
|
put_device(&fnode_sess->dev);
|
|
|
|
put_host:
|
|
scsi_host_put(shost);
|
|
|
|
exit_login_fnode:
|
|
return err;
|
|
}
|
|
|
|
static int iscsi_logout_flashnode(struct iscsi_transport *transport,
|
|
struct iscsi_uevent *ev)
|
|
{
|
|
struct Scsi_Host *shost;
|
|
struct iscsi_bus_flash_session *fnode_sess;
|
|
struct iscsi_bus_flash_conn *fnode_conn;
|
|
struct device *dev;
|
|
uint32_t idx;
|
|
int err = 0;
|
|
|
|
if (!transport->logout_flashnode) {
|
|
err = -ENOSYS;
|
|
goto exit_logout_fnode;
|
|
}
|
|
|
|
shost = scsi_host_lookup(ev->u.logout_flashnode.host_no);
|
|
if (!shost) {
|
|
pr_err("%s could not find host no %u\n",
|
|
__func__, ev->u.logout_flashnode.host_no);
|
|
err = -ENODEV;
|
|
goto put_host;
|
|
}
|
|
|
|
idx = ev->u.logout_flashnode.flashnode_idx;
|
|
fnode_sess = iscsi_get_flashnode_by_index(shost, idx);
|
|
if (!fnode_sess) {
|
|
pr_err("%s could not find flashnode %u for host no %u\n",
|
|
__func__, idx, ev->u.logout_flashnode.host_no);
|
|
err = -ENODEV;
|
|
goto put_host;
|
|
}
|
|
|
|
dev = iscsi_find_flashnode_conn(fnode_sess);
|
|
if (!dev) {
|
|
err = -ENODEV;
|
|
goto put_sess;
|
|
}
|
|
|
|
fnode_conn = iscsi_dev_to_flash_conn(dev);
|
|
|
|
err = transport->logout_flashnode(fnode_sess, fnode_conn);
|
|
put_device(dev);
|
|
|
|
put_sess:
|
|
put_device(&fnode_sess->dev);
|
|
|
|
put_host:
|
|
scsi_host_put(shost);
|
|
|
|
exit_logout_fnode:
|
|
return err;
|
|
}
|
|
|
|
static int iscsi_logout_flashnode_sid(struct iscsi_transport *transport,
|
|
struct iscsi_uevent *ev)
|
|
{
|
|
struct Scsi_Host *shost;
|
|
struct iscsi_cls_session *session;
|
|
int err = 0;
|
|
|
|
if (!transport->logout_flashnode_sid) {
|
|
err = -ENOSYS;
|
|
goto exit_logout_sid;
|
|
}
|
|
|
|
shost = scsi_host_lookup(ev->u.logout_flashnode_sid.host_no);
|
|
if (!shost) {
|
|
pr_err("%s could not find host no %u\n",
|
|
__func__, ev->u.logout_flashnode.host_no);
|
|
err = -ENODEV;
|
|
goto put_host;
|
|
}
|
|
|
|
session = iscsi_session_lookup(ev->u.logout_flashnode_sid.sid);
|
|
if (!session) {
|
|
pr_err("%s could not find session id %u\n",
|
|
__func__, ev->u.logout_flashnode_sid.sid);
|
|
err = -EINVAL;
|
|
goto put_host;
|
|
}
|
|
|
|
err = transport->logout_flashnode_sid(session);
|
|
|
|
put_host:
|
|
scsi_host_put(shost);
|
|
|
|
exit_logout_sid:
|
|
return err;
|
|
}
|
|
|
|
static int
|
|
iscsi_if_recv_msg(struct sk_buff *skb, struct nlmsghdr *nlh, uint32_t *group)
|
|
{
|
|
int err = 0;
|
|
struct iscsi_uevent *ev = nlmsg_data(nlh);
|
|
struct iscsi_transport *transport = NULL;
|
|
struct iscsi_internal *priv;
|
|
struct iscsi_cls_session *session;
|
|
struct iscsi_cls_conn *conn;
|
|
struct iscsi_endpoint *ep = NULL;
|
|
|
|
if (nlh->nlmsg_type == ISCSI_UEVENT_PATH_UPDATE)
|
|
*group = ISCSI_NL_GRP_UIP;
|
|
else
|
|
*group = ISCSI_NL_GRP_ISCSID;
|
|
|
|
priv = iscsi_if_transport_lookup(iscsi_ptr(ev->transport_handle));
|
|
if (!priv)
|
|
return -EINVAL;
|
|
transport = priv->iscsi_transport;
|
|
|
|
if (!try_module_get(transport->owner))
|
|
return -EINVAL;
|
|
|
|
switch (nlh->nlmsg_type) {
|
|
case ISCSI_UEVENT_CREATE_SESSION:
|
|
err = iscsi_if_create_session(priv, ep, ev,
|
|
NETLINK_CB(skb).portid,
|
|
ev->u.c_session.initial_cmdsn,
|
|
ev->u.c_session.cmds_max,
|
|
ev->u.c_session.queue_depth);
|
|
break;
|
|
case ISCSI_UEVENT_CREATE_BOUND_SESSION:
|
|
ep = iscsi_lookup_endpoint(ev->u.c_bound_session.ep_handle);
|
|
if (!ep) {
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
err = iscsi_if_create_session(priv, ep, ev,
|
|
NETLINK_CB(skb).portid,
|
|
ev->u.c_bound_session.initial_cmdsn,
|
|
ev->u.c_bound_session.cmds_max,
|
|
ev->u.c_bound_session.queue_depth);
|
|
break;
|
|
case ISCSI_UEVENT_DESTROY_SESSION:
|
|
session = iscsi_session_lookup(ev->u.d_session.sid);
|
|
if (session)
|
|
transport->destroy_session(session);
|
|
else
|
|
err = -EINVAL;
|
|
break;
|
|
case ISCSI_UEVENT_UNBIND_SESSION:
|
|
session = iscsi_session_lookup(ev->u.d_session.sid);
|
|
if (session)
|
|
scsi_queue_work(iscsi_session_to_shost(session),
|
|
&session->unbind_work);
|
|
else
|
|
err = -EINVAL;
|
|
break;
|
|
case ISCSI_UEVENT_CREATE_CONN:
|
|
err = iscsi_if_create_conn(transport, ev);
|
|
break;
|
|
case ISCSI_UEVENT_DESTROY_CONN:
|
|
err = iscsi_if_destroy_conn(transport, ev);
|
|
break;
|
|
case ISCSI_UEVENT_BIND_CONN:
|
|
session = iscsi_session_lookup(ev->u.b_conn.sid);
|
|
conn = iscsi_conn_lookup(ev->u.b_conn.sid, ev->u.b_conn.cid);
|
|
|
|
if (conn && conn->ep)
|
|
iscsi_if_ep_disconnect(transport, conn->ep->id);
|
|
|
|
if (!session || !conn) {
|
|
err = -EINVAL;
|
|
break;
|
|
}
|
|
|
|
ev->r.retcode = transport->bind_conn(session, conn,
|
|
ev->u.b_conn.transport_eph,
|
|
ev->u.b_conn.is_leading);
|
|
if (ev->r.retcode || !transport->ep_connect)
|
|
break;
|
|
|
|
ep = iscsi_lookup_endpoint(ev->u.b_conn.transport_eph);
|
|
if (ep) {
|
|
ep->conn = conn;
|
|
|
|
mutex_lock(&conn->ep_mutex);
|
|
conn->ep = ep;
|
|
mutex_unlock(&conn->ep_mutex);
|
|
} else
|
|
iscsi_cls_conn_printk(KERN_ERR, conn,
|
|
"Could not set ep conn "
|
|
"binding\n");
|
|
break;
|
|
case ISCSI_UEVENT_SET_PARAM:
|
|
err = iscsi_set_param(transport, ev);
|
|
break;
|
|
case ISCSI_UEVENT_START_CONN:
|
|
conn = iscsi_conn_lookup(ev->u.start_conn.sid, ev->u.start_conn.cid);
|
|
if (conn)
|
|
ev->r.retcode = transport->start_conn(conn);
|
|
else
|
|
err = -EINVAL;
|
|
break;
|
|
case ISCSI_UEVENT_STOP_CONN:
|
|
conn = iscsi_conn_lookup(ev->u.stop_conn.sid, ev->u.stop_conn.cid);
|
|
if (conn)
|
|
transport->stop_conn(conn, ev->u.stop_conn.flag);
|
|
else
|
|
err = -EINVAL;
|
|
break;
|
|
case ISCSI_UEVENT_SEND_PDU:
|
|
conn = iscsi_conn_lookup(ev->u.send_pdu.sid, ev->u.send_pdu.cid);
|
|
if (conn)
|
|
ev->r.retcode = transport->send_pdu(conn,
|
|
(struct iscsi_hdr*)((char*)ev + sizeof(*ev)),
|
|
(char*)ev + sizeof(*ev) + ev->u.send_pdu.hdr_size,
|
|
ev->u.send_pdu.data_size);
|
|
else
|
|
err = -EINVAL;
|
|
break;
|
|
case ISCSI_UEVENT_GET_STATS:
|
|
err = iscsi_if_get_stats(transport, nlh);
|
|
break;
|
|
case ISCSI_UEVENT_TRANSPORT_EP_CONNECT:
|
|
case ISCSI_UEVENT_TRANSPORT_EP_POLL:
|
|
case ISCSI_UEVENT_TRANSPORT_EP_DISCONNECT:
|
|
case ISCSI_UEVENT_TRANSPORT_EP_CONNECT_THROUGH_HOST:
|
|
err = iscsi_if_transport_ep(transport, ev, nlh->nlmsg_type);
|
|
break;
|
|
case ISCSI_UEVENT_TGT_DSCVR:
|
|
err = iscsi_tgt_dscvr(transport, ev);
|
|
break;
|
|
case ISCSI_UEVENT_SET_HOST_PARAM:
|
|
err = iscsi_set_host_param(transport, ev);
|
|
break;
|
|
case ISCSI_UEVENT_PATH_UPDATE:
|
|
err = iscsi_set_path(transport, ev);
|
|
break;
|
|
case ISCSI_UEVENT_SET_IFACE_PARAMS:
|
|
err = iscsi_set_iface_params(transport, ev,
|
|
nlmsg_attrlen(nlh, sizeof(*ev)));
|
|
break;
|
|
case ISCSI_UEVENT_PING:
|
|
err = iscsi_send_ping(transport, ev);
|
|
break;
|
|
case ISCSI_UEVENT_GET_CHAP:
|
|
err = iscsi_get_chap(transport, nlh);
|
|
break;
|
|
case ISCSI_UEVENT_DELETE_CHAP:
|
|
err = iscsi_delete_chap(transport, ev);
|
|
break;
|
|
case ISCSI_UEVENT_SET_FLASHNODE_PARAMS:
|
|
err = iscsi_set_flashnode_param(transport, ev,
|
|
nlmsg_attrlen(nlh,
|
|
sizeof(*ev)));
|
|
break;
|
|
case ISCSI_UEVENT_NEW_FLASHNODE:
|
|
err = iscsi_new_flashnode(transport, ev,
|
|
nlmsg_attrlen(nlh, sizeof(*ev)));
|
|
break;
|
|
case ISCSI_UEVENT_DEL_FLASHNODE:
|
|
err = iscsi_del_flashnode(transport, ev);
|
|
break;
|
|
case ISCSI_UEVENT_LOGIN_FLASHNODE:
|
|
err = iscsi_login_flashnode(transport, ev);
|
|
break;
|
|
case ISCSI_UEVENT_LOGOUT_FLASHNODE:
|
|
err = iscsi_logout_flashnode(transport, ev);
|
|
break;
|
|
case ISCSI_UEVENT_LOGOUT_FLASHNODE_SID:
|
|
err = iscsi_logout_flashnode_sid(transport, ev);
|
|
break;
|
|
default:
|
|
err = -ENOSYS;
|
|
break;
|
|
}
|
|
|
|
module_put(transport->owner);
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* Get message from skb. Each message is processed by iscsi_if_recv_msg.
|
|
* Malformed skbs with wrong lengths or invalid creds are not processed.
|
|
*/
|
|
static void
|
|
iscsi_if_rx(struct sk_buff *skb)
|
|
{
|
|
mutex_lock(&rx_queue_mutex);
|
|
while (skb->len >= NLMSG_HDRLEN) {
|
|
int err;
|
|
uint32_t rlen;
|
|
struct nlmsghdr *nlh;
|
|
struct iscsi_uevent *ev;
|
|
uint32_t group;
|
|
|
|
nlh = nlmsg_hdr(skb);
|
|
if (nlh->nlmsg_len < sizeof(*nlh) ||
|
|
skb->len < nlh->nlmsg_len) {
|
|
break;
|
|
}
|
|
|
|
ev = nlmsg_data(nlh);
|
|
rlen = NLMSG_ALIGN(nlh->nlmsg_len);
|
|
if (rlen > skb->len)
|
|
rlen = skb->len;
|
|
|
|
err = iscsi_if_recv_msg(skb, nlh, &group);
|
|
if (err) {
|
|
ev->type = ISCSI_KEVENT_IF_ERROR;
|
|
ev->iferror = err;
|
|
}
|
|
do {
|
|
/*
|
|
* special case for GET_STATS:
|
|
* on success - sending reply and stats from
|
|
* inside of if_recv_msg(),
|
|
* on error - fall through.
|
|
*/
|
|
if (ev->type == ISCSI_UEVENT_GET_STATS && !err)
|
|
break;
|
|
if (ev->type == ISCSI_UEVENT_GET_CHAP && !err)
|
|
break;
|
|
err = iscsi_if_send_reply(group, nlh->nlmsg_seq,
|
|
nlh->nlmsg_type, 0, 0, ev, sizeof(*ev));
|
|
} while (err < 0 && err != -ECONNREFUSED && err != -ESRCH);
|
|
skb_pull(skb, rlen);
|
|
}
|
|
mutex_unlock(&rx_queue_mutex);
|
|
}
|
|
|
|
#define ISCSI_CLASS_ATTR(_prefix,_name,_mode,_show,_store) \
|
|
struct device_attribute dev_attr_##_prefix##_##_name = \
|
|
__ATTR(_name,_mode,_show,_store)
|
|
|
|
/*
|
|
* iSCSI connection attrs
|
|
*/
|
|
#define iscsi_conn_attr_show(param) \
|
|
static ssize_t \
|
|
show_conn_param_##param(struct device *dev, \
|
|
struct device_attribute *attr, char *buf) \
|
|
{ \
|
|
struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \
|
|
struct iscsi_transport *t = conn->transport; \
|
|
return t->get_conn_param(conn, param, buf); \
|
|
}
|
|
|
|
#define iscsi_conn_attr(field, param) \
|
|
iscsi_conn_attr_show(param) \
|
|
static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, show_conn_param_##param, \
|
|
NULL);
|
|
|
|
iscsi_conn_attr(max_recv_dlength, ISCSI_PARAM_MAX_RECV_DLENGTH);
|
|
iscsi_conn_attr(max_xmit_dlength, ISCSI_PARAM_MAX_XMIT_DLENGTH);
|
|
iscsi_conn_attr(header_digest, ISCSI_PARAM_HDRDGST_EN);
|
|
iscsi_conn_attr(data_digest, ISCSI_PARAM_DATADGST_EN);
|
|
iscsi_conn_attr(ifmarker, ISCSI_PARAM_IFMARKER_EN);
|
|
iscsi_conn_attr(ofmarker, ISCSI_PARAM_OFMARKER_EN);
|
|
iscsi_conn_attr(persistent_port, ISCSI_PARAM_PERSISTENT_PORT);
|
|
iscsi_conn_attr(exp_statsn, ISCSI_PARAM_EXP_STATSN);
|
|
iscsi_conn_attr(persistent_address, ISCSI_PARAM_PERSISTENT_ADDRESS);
|
|
iscsi_conn_attr(ping_tmo, ISCSI_PARAM_PING_TMO);
|
|
iscsi_conn_attr(recv_tmo, ISCSI_PARAM_RECV_TMO);
|
|
|
|
#define iscsi_conn_ep_attr_show(param) \
|
|
static ssize_t show_conn_ep_param_##param(struct device *dev, \
|
|
struct device_attribute *attr,\
|
|
char *buf) \
|
|
{ \
|
|
struct iscsi_cls_conn *conn = iscsi_dev_to_conn(dev->parent); \
|
|
struct iscsi_transport *t = conn->transport; \
|
|
struct iscsi_endpoint *ep; \
|
|
ssize_t rc; \
|
|
\
|
|
/* \
|
|
* Need to make sure ep_disconnect does not free the LLD's \
|
|
* interconnect resources while we are trying to read them. \
|
|
*/ \
|
|
mutex_lock(&conn->ep_mutex); \
|
|
ep = conn->ep; \
|
|
if (!ep && t->ep_connect) { \
|
|
mutex_unlock(&conn->ep_mutex); \
|
|
return -ENOTCONN; \
|
|
} \
|
|
\
|
|
if (ep) \
|
|
rc = t->get_ep_param(ep, param, buf); \
|
|
else \
|
|
rc = t->get_conn_param(conn, param, buf); \
|
|
mutex_unlock(&conn->ep_mutex); \
|
|
return rc; \
|
|
}
|
|
|
|
#define iscsi_conn_ep_attr(field, param) \
|
|
iscsi_conn_ep_attr_show(param) \
|
|
static ISCSI_CLASS_ATTR(conn, field, S_IRUGO, \
|
|
show_conn_ep_param_##param, NULL);
|
|
|
|
iscsi_conn_ep_attr(address, ISCSI_PARAM_CONN_ADDRESS);
|
|
iscsi_conn_ep_attr(port, ISCSI_PARAM_CONN_PORT);
|
|
|
|
static struct attribute *iscsi_conn_attrs[] = {
|
|
&dev_attr_conn_max_recv_dlength.attr,
|
|
&dev_attr_conn_max_xmit_dlength.attr,
|
|
&dev_attr_conn_header_digest.attr,
|
|
&dev_attr_conn_data_digest.attr,
|
|
&dev_attr_conn_ifmarker.attr,
|
|
&dev_attr_conn_ofmarker.attr,
|
|
&dev_attr_conn_address.attr,
|
|
&dev_attr_conn_port.attr,
|
|
&dev_attr_conn_exp_statsn.attr,
|
|
&dev_attr_conn_persistent_address.attr,
|
|
&dev_attr_conn_persistent_port.attr,
|
|
&dev_attr_conn_ping_tmo.attr,
|
|
&dev_attr_conn_recv_tmo.attr,
|
|
NULL,
|
|
};
|
|
|
|
static umode_t iscsi_conn_attr_is_visible(struct kobject *kobj,
|
|
struct attribute *attr, int i)
|
|
{
|
|
struct device *cdev = container_of(kobj, struct device, kobj);
|
|
struct iscsi_cls_conn *conn = transport_class_to_conn(cdev);
|
|
struct iscsi_transport *t = conn->transport;
|
|
int param;
|
|
|
|
if (attr == &dev_attr_conn_max_recv_dlength.attr)
|
|
param = ISCSI_PARAM_MAX_RECV_DLENGTH;
|
|
else if (attr == &dev_attr_conn_max_xmit_dlength.attr)
|
|
param = ISCSI_PARAM_MAX_XMIT_DLENGTH;
|
|
else if (attr == &dev_attr_conn_header_digest.attr)
|
|
param = ISCSI_PARAM_HDRDGST_EN;
|
|
else if (attr == &dev_attr_conn_data_digest.attr)
|
|
param = ISCSI_PARAM_DATADGST_EN;
|
|
else if (attr == &dev_attr_conn_ifmarker.attr)
|
|
param = ISCSI_PARAM_IFMARKER_EN;
|
|
else if (attr == &dev_attr_conn_ofmarker.attr)
|
|
param = ISCSI_PARAM_OFMARKER_EN;
|
|
else if (attr == &dev_attr_conn_address.attr)
|
|
param = ISCSI_PARAM_CONN_ADDRESS;
|
|
else if (attr == &dev_attr_conn_port.attr)
|
|
param = ISCSI_PARAM_CONN_PORT;
|
|
else if (attr == &dev_attr_conn_exp_statsn.attr)
|
|
param = ISCSI_PARAM_EXP_STATSN;
|
|
else if (attr == &dev_attr_conn_persistent_address.attr)
|
|
param = ISCSI_PARAM_PERSISTENT_ADDRESS;
|
|
else if (attr == &dev_attr_conn_persistent_port.attr)
|
|
param = ISCSI_PARAM_PERSISTENT_PORT;
|
|
else if (attr == &dev_attr_conn_ping_tmo.attr)
|
|
param = ISCSI_PARAM_PING_TMO;
|
|
else if (attr == &dev_attr_conn_recv_tmo.attr)
|
|
param = ISCSI_PARAM_RECV_TMO;
|
|
else {
|
|
WARN_ONCE(1, "Invalid conn attr");
|
|
return 0;
|
|
}
|
|
|
|
return t->attr_is_visible(ISCSI_PARAM, param);
|
|
}
|
|
|
|
static struct attribute_group iscsi_conn_group = {
|
|
.attrs = iscsi_conn_attrs,
|
|
.is_visible = iscsi_conn_attr_is_visible,
|
|
};
|
|
|
|
/*
|
|
* iSCSI session attrs
|
|
*/
|
|
#define iscsi_session_attr_show(param, perm) \
|
|
static ssize_t \
|
|
show_session_param_##param(struct device *dev, \
|
|
struct device_attribute *attr, char *buf) \
|
|
{ \
|
|
struct iscsi_cls_session *session = \
|
|
iscsi_dev_to_session(dev->parent); \
|
|
struct iscsi_transport *t = session->transport; \
|
|
\
|
|
if (perm && !capable(CAP_SYS_ADMIN)) \
|
|
return -EACCES; \
|
|
return t->get_session_param(session, param, buf); \
|
|
}
|
|
|
|
#define iscsi_session_attr(field, param, perm) \
|
|
iscsi_session_attr_show(param, perm) \
|
|
static ISCSI_CLASS_ATTR(sess, field, S_IRUGO, show_session_param_##param, \
|
|
NULL);
|
|
iscsi_session_attr(targetname, ISCSI_PARAM_TARGET_NAME, 0);
|
|
iscsi_session_attr(initial_r2t, ISCSI_PARAM_INITIAL_R2T_EN, 0);
|
|
iscsi_session_attr(max_outstanding_r2t, ISCSI_PARAM_MAX_R2T, 0);
|
|
iscsi_session_attr(immediate_data, ISCSI_PARAM_IMM_DATA_EN, 0);
|
|
iscsi_session_attr(first_burst_len, ISCSI_PARAM_FIRST_BURST, 0);
|
|
iscsi_session_attr(max_burst_len, ISCSI_PARAM_MAX_BURST, 0);
|
|
iscsi_session_attr(data_pdu_in_order, ISCSI_PARAM_PDU_INORDER_EN, 0);
|
|
iscsi_session_attr(data_seq_in_order, ISCSI_PARAM_DATASEQ_INORDER_EN, 0);
|
|
iscsi_session_attr(erl, ISCSI_PARAM_ERL, 0);
|
|
iscsi_session_attr(tpgt, ISCSI_PARAM_TPGT, 0);
|
|
iscsi_session_attr(username, ISCSI_PARAM_USERNAME, 1);
|
|
iscsi_session_attr(username_in, ISCSI_PARAM_USERNAME_IN, 1);
|
|
iscsi_session_attr(password, ISCSI_PARAM_PASSWORD, 1);
|
|
iscsi_session_attr(password_in, ISCSI_PARAM_PASSWORD_IN, 1);
|
|
iscsi_session_attr(chap_out_idx, ISCSI_PARAM_CHAP_OUT_IDX, 1);
|
|
iscsi_session_attr(chap_in_idx, ISCSI_PARAM_CHAP_IN_IDX, 1);
|
|
iscsi_session_attr(fast_abort, ISCSI_PARAM_FAST_ABORT, 0);
|
|
iscsi_session_attr(abort_tmo, ISCSI_PARAM_ABORT_TMO, 0);
|
|
iscsi_session_attr(lu_reset_tmo, ISCSI_PARAM_LU_RESET_TMO, 0);
|
|
iscsi_session_attr(tgt_reset_tmo, ISCSI_PARAM_TGT_RESET_TMO, 0);
|
|
iscsi_session_attr(ifacename, ISCSI_PARAM_IFACE_NAME, 0);
|
|
iscsi_session_attr(initiatorname, ISCSI_PARAM_INITIATOR_NAME, 0);
|
|
iscsi_session_attr(targetalias, ISCSI_PARAM_TARGET_ALIAS, 0);
|
|
iscsi_session_attr(boot_root, ISCSI_PARAM_BOOT_ROOT, 0);
|
|
iscsi_session_attr(boot_nic, ISCSI_PARAM_BOOT_NIC, 0);
|
|
iscsi_session_attr(boot_target, ISCSI_PARAM_BOOT_TARGET, 0);
|
|
|
|
static ssize_t
|
|
show_priv_session_state(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
|
|
return sprintf(buf, "%s\n", iscsi_session_state_name(session->state));
|
|
}
|
|
static ISCSI_CLASS_ATTR(priv_sess, state, S_IRUGO, show_priv_session_state,
|
|
NULL);
|
|
static ssize_t
|
|
show_priv_session_creator(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
|
|
return sprintf(buf, "%d\n", session->creator);
|
|
}
|
|
static ISCSI_CLASS_ATTR(priv_sess, creator, S_IRUGO, show_priv_session_creator,
|
|
NULL);
|
|
static ssize_t
|
|
show_priv_session_target_id(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct iscsi_cls_session *session = iscsi_dev_to_session(dev->parent);
|
|
return sprintf(buf, "%d\n", session->target_id);
|
|
}
|
|
static ISCSI_CLASS_ATTR(priv_sess, target_id, S_IRUGO,
|
|
show_priv_session_target_id, NULL);
|
|
|
|
#define iscsi_priv_session_attr_show(field, format) \
|
|
static ssize_t \
|
|
show_priv_session_##field(struct device *dev, \
|
|
struct device_attribute *attr, char *buf) \
|
|
{ \
|
|
struct iscsi_cls_session *session = \
|
|
iscsi_dev_to_session(dev->parent); \
|
|
if (session->field == -1) \
|
|
return sprintf(buf, "off\n"); \
|
|
return sprintf(buf, format"\n", session->field); \
|
|
}
|
|
|
|
#define iscsi_priv_session_attr_store(field) \
|
|
static ssize_t \
|
|
store_priv_session_##field(struct device *dev, \
|
|
struct device_attribute *attr, \
|
|
const char *buf, size_t count) \
|
|
{ \
|
|
int val; \
|
|
char *cp; \
|
|
struct iscsi_cls_session *session = \
|
|
iscsi_dev_to_session(dev->parent); \
|
|
if ((session->state == ISCSI_SESSION_FREE) || \
|
|
(session->state == ISCSI_SESSION_FAILED)) \
|
|
return -EBUSY; \
|
|
if (strncmp(buf, "off", 3) == 0) \
|
|
session->field = -1; \
|
|
else { \
|
|
val = simple_strtoul(buf, &cp, 0); \
|
|
if (*cp != '\0' && *cp != '\n') \
|
|
return -EINVAL; \
|
|
session->field = val; \
|
|
} \
|
|
return count; \
|
|
}
|
|
|
|
#define iscsi_priv_session_rw_attr(field, format) \
|
|
iscsi_priv_session_attr_show(field, format) \
|
|
iscsi_priv_session_attr_store(field) \
|
|
static ISCSI_CLASS_ATTR(priv_sess, field, S_IRUGO | S_IWUSR, \
|
|
show_priv_session_##field, \
|
|
store_priv_session_##field)
|
|
iscsi_priv_session_rw_attr(recovery_tmo, "%d");
|
|
|
|
static struct attribute *iscsi_session_attrs[] = {
|
|
&dev_attr_sess_initial_r2t.attr,
|
|
&dev_attr_sess_max_outstanding_r2t.attr,
|
|
&dev_attr_sess_immediate_data.attr,
|
|
&dev_attr_sess_first_burst_len.attr,
|
|
&dev_attr_sess_max_burst_len.attr,
|
|
&dev_attr_sess_data_pdu_in_order.attr,
|
|
&dev_attr_sess_data_seq_in_order.attr,
|
|
&dev_attr_sess_erl.attr,
|
|
&dev_attr_sess_targetname.attr,
|
|
&dev_attr_sess_tpgt.attr,
|
|
&dev_attr_sess_password.attr,
|
|
&dev_attr_sess_password_in.attr,
|
|
&dev_attr_sess_username.attr,
|
|
&dev_attr_sess_username_in.attr,
|
|
&dev_attr_sess_fast_abort.attr,
|
|
&dev_attr_sess_abort_tmo.attr,
|
|
&dev_attr_sess_lu_reset_tmo.attr,
|
|
&dev_attr_sess_tgt_reset_tmo.attr,
|
|
&dev_attr_sess_ifacename.attr,
|
|
&dev_attr_sess_initiatorname.attr,
|
|
&dev_attr_sess_targetalias.attr,
|
|
&dev_attr_sess_boot_root.attr,
|
|
&dev_attr_sess_boot_nic.attr,
|
|
&dev_attr_sess_boot_target.attr,
|
|
&dev_attr_priv_sess_recovery_tmo.attr,
|
|
&dev_attr_priv_sess_state.attr,
|
|
&dev_attr_priv_sess_creator.attr,
|
|
&dev_attr_sess_chap_out_idx.attr,
|
|
&dev_attr_sess_chap_in_idx.attr,
|
|
&dev_attr_priv_sess_target_id.attr,
|
|
NULL,
|
|
};
|
|
|
|
static umode_t iscsi_session_attr_is_visible(struct kobject *kobj,
|
|
struct attribute *attr, int i)
|
|
{
|
|
struct device *cdev = container_of(kobj, struct device, kobj);
|
|
struct iscsi_cls_session *session = transport_class_to_session(cdev);
|
|
struct iscsi_transport *t = session->transport;
|
|
int param;
|
|
|
|
if (attr == &dev_attr_sess_initial_r2t.attr)
|
|
param = ISCSI_PARAM_INITIAL_R2T_EN;
|
|
else if (attr == &dev_attr_sess_max_outstanding_r2t.attr)
|
|
param = ISCSI_PARAM_MAX_R2T;
|
|
else if (attr == &dev_attr_sess_immediate_data.attr)
|
|
param = ISCSI_PARAM_IMM_DATA_EN;
|
|
else if (attr == &dev_attr_sess_first_burst_len.attr)
|
|
param = ISCSI_PARAM_FIRST_BURST;
|
|
else if (attr == &dev_attr_sess_max_burst_len.attr)
|
|
param = ISCSI_PARAM_MAX_BURST;
|
|
else if (attr == &dev_attr_sess_data_pdu_in_order.attr)
|
|
param = ISCSI_PARAM_PDU_INORDER_EN;
|
|
else if (attr == &dev_attr_sess_data_seq_in_order.attr)
|
|
param = ISCSI_PARAM_DATASEQ_INORDER_EN;
|
|
else if (attr == &dev_attr_sess_erl.attr)
|
|
param = ISCSI_PARAM_ERL;
|
|
else if (attr == &dev_attr_sess_targetname.attr)
|
|
param = ISCSI_PARAM_TARGET_NAME;
|
|
else if (attr == &dev_attr_sess_tpgt.attr)
|
|
param = ISCSI_PARAM_TPGT;
|
|
else if (attr == &dev_attr_sess_chap_in_idx.attr)
|
|
param = ISCSI_PARAM_CHAP_IN_IDX;
|
|
else if (attr == &dev_attr_sess_chap_out_idx.attr)
|
|
param = ISCSI_PARAM_CHAP_OUT_IDX;
|
|
else if (attr == &dev_attr_sess_password.attr)
|
|
param = ISCSI_PARAM_USERNAME;
|
|
else if (attr == &dev_attr_sess_password_in.attr)
|
|
param = ISCSI_PARAM_USERNAME_IN;
|
|
else if (attr == &dev_attr_sess_username.attr)
|
|
param = ISCSI_PARAM_PASSWORD;
|
|
else if (attr == &dev_attr_sess_username_in.attr)
|
|
param = ISCSI_PARAM_PASSWORD_IN;
|
|
else if (attr == &dev_attr_sess_fast_abort.attr)
|
|
param = ISCSI_PARAM_FAST_ABORT;
|
|
else if (attr == &dev_attr_sess_abort_tmo.attr)
|
|
param = ISCSI_PARAM_ABORT_TMO;
|
|
else if (attr == &dev_attr_sess_lu_reset_tmo.attr)
|
|
param = ISCSI_PARAM_LU_RESET_TMO;
|
|
else if (attr == &dev_attr_sess_tgt_reset_tmo.attr)
|
|
param = ISCSI_PARAM_TGT_RESET_TMO;
|
|
else if (attr == &dev_attr_sess_ifacename.attr)
|
|
param = ISCSI_PARAM_IFACE_NAME;
|
|
else if (attr == &dev_attr_sess_initiatorname.attr)
|
|
param = ISCSI_PARAM_INITIATOR_NAME;
|
|
else if (attr == &dev_attr_sess_targetalias.attr)
|
|
param = ISCSI_PARAM_TARGET_ALIAS;
|
|
else if (attr == &dev_attr_sess_boot_root.attr)
|
|
param = ISCSI_PARAM_BOOT_ROOT;
|
|
else if (attr == &dev_attr_sess_boot_nic.attr)
|
|
param = ISCSI_PARAM_BOOT_NIC;
|
|
else if (attr == &dev_attr_sess_boot_target.attr)
|
|
param = ISCSI_PARAM_BOOT_TARGET;
|
|
else if (attr == &dev_attr_priv_sess_recovery_tmo.attr)
|
|
return S_IRUGO | S_IWUSR;
|
|
else if (attr == &dev_attr_priv_sess_state.attr)
|
|
return S_IRUGO;
|
|
else if (attr == &dev_attr_priv_sess_creator.attr)
|
|
return S_IRUGO;
|
|
else if (attr == &dev_attr_priv_sess_target_id.attr)
|
|
return S_IRUGO;
|
|
else {
|
|
WARN_ONCE(1, "Invalid session attr");
|
|
return 0;
|
|
}
|
|
|
|
return t->attr_is_visible(ISCSI_PARAM, param);
|
|
}
|
|
|
|
static struct attribute_group iscsi_session_group = {
|
|
.attrs = iscsi_session_attrs,
|
|
.is_visible = iscsi_session_attr_is_visible,
|
|
};
|
|
|
|
/*
|
|
* iSCSI host attrs
|
|
*/
|
|
#define iscsi_host_attr_show(param) \
|
|
static ssize_t \
|
|
show_host_param_##param(struct device *dev, \
|
|
struct device_attribute *attr, char *buf) \
|
|
{ \
|
|
struct Scsi_Host *shost = transport_class_to_shost(dev); \
|
|
struct iscsi_internal *priv = to_iscsi_internal(shost->transportt); \
|
|
return priv->iscsi_transport->get_host_param(shost, param, buf); \
|
|
}
|
|
|
|
#define iscsi_host_attr(field, param) \
|
|
iscsi_host_attr_show(param) \
|
|
static ISCSI_CLASS_ATTR(host, field, S_IRUGO, show_host_param_##param, \
|
|
NULL);
|
|
|
|
iscsi_host_attr(netdev, ISCSI_HOST_PARAM_NETDEV_NAME);
|
|
iscsi_host_attr(hwaddress, ISCSI_HOST_PARAM_HWADDRESS);
|
|
iscsi_host_attr(ipaddress, ISCSI_HOST_PARAM_IPADDRESS);
|
|
iscsi_host_attr(initiatorname, ISCSI_HOST_PARAM_INITIATOR_NAME);
|
|
iscsi_host_attr(port_state, ISCSI_HOST_PARAM_PORT_STATE);
|
|
iscsi_host_attr(port_speed, ISCSI_HOST_PARAM_PORT_SPEED);
|
|
|
|
static struct attribute *iscsi_host_attrs[] = {
|
|
&dev_attr_host_netdev.attr,
|
|
&dev_attr_host_hwaddress.attr,
|
|
&dev_attr_host_ipaddress.attr,
|
|
&dev_attr_host_initiatorname.attr,
|
|
&dev_attr_host_port_state.attr,
|
|
&dev_attr_host_port_speed.attr,
|
|
NULL,
|
|
};
|
|
|
|
static umode_t iscsi_host_attr_is_visible(struct kobject *kobj,
|
|
struct attribute *attr, int i)
|
|
{
|
|
struct device *cdev = container_of(kobj, struct device, kobj);
|
|
struct Scsi_Host *shost = transport_class_to_shost(cdev);
|
|
struct iscsi_internal *priv = to_iscsi_internal(shost->transportt);
|
|
int param;
|
|
|
|
if (attr == &dev_attr_host_netdev.attr)
|
|
param = ISCSI_HOST_PARAM_NETDEV_NAME;
|
|
else if (attr == &dev_attr_host_hwaddress.attr)
|
|
param = ISCSI_HOST_PARAM_HWADDRESS;
|
|
else if (attr == &dev_attr_host_ipaddress.attr)
|
|
param = ISCSI_HOST_PARAM_IPADDRESS;
|
|
else if (attr == &dev_attr_host_initiatorname.attr)
|
|
param = ISCSI_HOST_PARAM_INITIATOR_NAME;
|
|
else if (attr == &dev_attr_host_port_state.attr)
|
|
param = ISCSI_HOST_PARAM_PORT_STATE;
|
|
else if (attr == &dev_attr_host_port_speed.attr)
|
|
param = ISCSI_HOST_PARAM_PORT_SPEED;
|
|
else {
|
|
WARN_ONCE(1, "Invalid host attr");
|
|
return 0;
|
|
}
|
|
|
|
return priv->iscsi_transport->attr_is_visible(ISCSI_HOST_PARAM, param);
|
|
}
|
|
|
|
static struct attribute_group iscsi_host_group = {
|
|
.attrs = iscsi_host_attrs,
|
|
.is_visible = iscsi_host_attr_is_visible,
|
|
};
|
|
|
|
/* convert iscsi_port_speed values to ascii string name */
|
|
static const struct {
|
|
enum iscsi_port_speed value;
|
|
char *name;
|
|
} iscsi_port_speed_names[] = {
|
|
{ISCSI_PORT_SPEED_UNKNOWN, "Unknown" },
|
|
{ISCSI_PORT_SPEED_10MBPS, "10 Mbps" },
|
|
{ISCSI_PORT_SPEED_100MBPS, "100 Mbps" },
|
|
{ISCSI_PORT_SPEED_1GBPS, "1 Gbps" },
|
|
{ISCSI_PORT_SPEED_10GBPS, "10 Gbps" },
|
|
};
|
|
|
|
char *iscsi_get_port_speed_name(struct Scsi_Host *shost)
|
|
{
|
|
int i;
|
|
char *speed = "Unknown!";
|
|
struct iscsi_cls_host *ihost = shost->shost_data;
|
|
uint32_t port_speed = ihost->port_speed;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(iscsi_port_speed_names); i++) {
|
|
if (iscsi_port_speed_names[i].value & port_speed) {
|
|
speed = iscsi_port_speed_names[i].name;
|
|
break;
|
|
}
|
|
}
|
|
return speed;
|
|
}
|
|
EXPORT_SYMBOL_GPL(iscsi_get_port_speed_name);
|
|
|
|
/* convert iscsi_port_state values to ascii string name */
|
|
static const struct {
|
|
enum iscsi_port_state value;
|
|
char *name;
|
|
} iscsi_port_state_names[] = {
|
|
{ISCSI_PORT_STATE_DOWN, "LINK DOWN" },
|
|
{ISCSI_PORT_STATE_UP, "LINK UP" },
|
|
};
|
|
|
|
char *iscsi_get_port_state_name(struct Scsi_Host *shost)
|
|
{
|
|
int i;
|
|
char *state = "Unknown!";
|
|
struct iscsi_cls_host *ihost = shost->shost_data;
|
|
uint32_t port_state = ihost->port_state;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(iscsi_port_state_names); i++) {
|
|
if (iscsi_port_state_names[i].value & port_state) {
|
|
state = iscsi_port_state_names[i].name;
|
|
break;
|
|
}
|
|
}
|
|
return state;
|
|
}
|
|
EXPORT_SYMBOL_GPL(iscsi_get_port_state_name);
|
|
|
|
static int iscsi_session_match(struct attribute_container *cont,
|
|
struct device *dev)
|
|
{
|
|
struct iscsi_cls_session *session;
|
|
struct Scsi_Host *shost;
|
|
struct iscsi_internal *priv;
|
|
|
|
if (!iscsi_is_session_dev(dev))
|
|
return 0;
|
|
|
|
session = iscsi_dev_to_session(dev);
|
|
shost = iscsi_session_to_shost(session);
|
|
if (!shost->transportt)
|
|
return 0;
|
|
|
|
priv = to_iscsi_internal(shost->transportt);
|
|
if (priv->session_cont.ac.class != &iscsi_session_class.class)
|
|
return 0;
|
|
|
|
return &priv->session_cont.ac == cont;
|
|
}
|
|
|
|
static int iscsi_conn_match(struct attribute_container *cont,
|
|
struct device *dev)
|
|
{
|
|
struct iscsi_cls_session *session;
|
|
struct iscsi_cls_conn *conn;
|
|
struct Scsi_Host *shost;
|
|
struct iscsi_internal *priv;
|
|
|
|
if (!iscsi_is_conn_dev(dev))
|
|
return 0;
|
|
|
|
conn = iscsi_dev_to_conn(dev);
|
|
session = iscsi_dev_to_session(conn->dev.parent);
|
|
shost = iscsi_session_to_shost(session);
|
|
|
|
if (!shost->transportt)
|
|
return 0;
|
|
|
|
priv = to_iscsi_internal(shost->transportt);
|
|
if (priv->conn_cont.ac.class != &iscsi_connection_class.class)
|
|
return 0;
|
|
|
|
return &priv->conn_cont.ac == cont;
|
|
}
|
|
|
|
static int iscsi_host_match(struct attribute_container *cont,
|
|
struct device *dev)
|
|
{
|
|
struct Scsi_Host *shost;
|
|
struct iscsi_internal *priv;
|
|
|
|
if (!scsi_is_host_device(dev))
|
|
return 0;
|
|
|
|
shost = dev_to_shost(dev);
|
|
if (!shost->transportt ||
|
|
shost->transportt->host_attrs.ac.class != &iscsi_host_class.class)
|
|
return 0;
|
|
|
|
priv = to_iscsi_internal(shost->transportt);
|
|
return &priv->t.host_attrs.ac == cont;
|
|
}
|
|
|
|
struct scsi_transport_template *
|
|
iscsi_register_transport(struct iscsi_transport *tt)
|
|
{
|
|
struct iscsi_internal *priv;
|
|
unsigned long flags;
|
|
int err;
|
|
|
|
BUG_ON(!tt);
|
|
|
|
priv = iscsi_if_transport_lookup(tt);
|
|
if (priv)
|
|
return NULL;
|
|
|
|
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
|
|
if (!priv)
|
|
return NULL;
|
|
INIT_LIST_HEAD(&priv->list);
|
|
priv->iscsi_transport = tt;
|
|
priv->t.user_scan = iscsi_user_scan;
|
|
priv->t.create_work_queue = 1;
|
|
|
|
priv->dev.class = &iscsi_transport_class;
|
|
dev_set_name(&priv->dev, "%s", tt->name);
|
|
err = device_register(&priv->dev);
|
|
if (err)
|
|
goto free_priv;
|
|
|
|
err = sysfs_create_group(&priv->dev.kobj, &iscsi_transport_group);
|
|
if (err)
|
|
goto unregister_dev;
|
|
|
|
/* host parameters */
|
|
priv->t.host_attrs.ac.class = &iscsi_host_class.class;
|
|
priv->t.host_attrs.ac.match = iscsi_host_match;
|
|
priv->t.host_attrs.ac.grp = &iscsi_host_group;
|
|
priv->t.host_size = sizeof(struct iscsi_cls_host);
|
|
transport_container_register(&priv->t.host_attrs);
|
|
|
|
/* connection parameters */
|
|
priv->conn_cont.ac.class = &iscsi_connection_class.class;
|
|
priv->conn_cont.ac.match = iscsi_conn_match;
|
|
priv->conn_cont.ac.grp = &iscsi_conn_group;
|
|
transport_container_register(&priv->conn_cont);
|
|
|
|
/* session parameters */
|
|
priv->session_cont.ac.class = &iscsi_session_class.class;
|
|
priv->session_cont.ac.match = iscsi_session_match;
|
|
priv->session_cont.ac.grp = &iscsi_session_group;
|
|
transport_container_register(&priv->session_cont);
|
|
|
|
spin_lock_irqsave(&iscsi_transport_lock, flags);
|
|
list_add(&priv->list, &iscsi_transports);
|
|
spin_unlock_irqrestore(&iscsi_transport_lock, flags);
|
|
|
|
printk(KERN_NOTICE "iscsi: registered transport (%s)\n", tt->name);
|
|
return &priv->t;
|
|
|
|
unregister_dev:
|
|
device_unregister(&priv->dev);
|
|
return NULL;
|
|
free_priv:
|
|
kfree(priv);
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL_GPL(iscsi_register_transport);
|
|
|
|
int iscsi_unregister_transport(struct iscsi_transport *tt)
|
|
{
|
|
struct iscsi_internal *priv;
|
|
unsigned long flags;
|
|
|
|
BUG_ON(!tt);
|
|
|
|
mutex_lock(&rx_queue_mutex);
|
|
|
|
priv = iscsi_if_transport_lookup(tt);
|
|
BUG_ON (!priv);
|
|
|
|
spin_lock_irqsave(&iscsi_transport_lock, flags);
|
|
list_del(&priv->list);
|
|
spin_unlock_irqrestore(&iscsi_transport_lock, flags);
|
|
|
|
transport_container_unregister(&priv->conn_cont);
|
|
transport_container_unregister(&priv->session_cont);
|
|
transport_container_unregister(&priv->t.host_attrs);
|
|
|
|
sysfs_remove_group(&priv->dev.kobj, &iscsi_transport_group);
|
|
device_unregister(&priv->dev);
|
|
mutex_unlock(&rx_queue_mutex);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(iscsi_unregister_transport);
|
|
|
|
static __init int iscsi_transport_init(void)
|
|
{
|
|
int err;
|
|
struct netlink_kernel_cfg cfg = {
|
|
.groups = 1,
|
|
.input = iscsi_if_rx,
|
|
};
|
|
printk(KERN_INFO "Loading iSCSI transport class v%s.\n",
|
|
ISCSI_TRANSPORT_VERSION);
|
|
|
|
atomic_set(&iscsi_session_nr, 0);
|
|
|
|
err = class_register(&iscsi_transport_class);
|
|
if (err)
|
|
return err;
|
|
|
|
err = class_register(&iscsi_endpoint_class);
|
|
if (err)
|
|
goto unregister_transport_class;
|
|
|
|
err = class_register(&iscsi_iface_class);
|
|
if (err)
|
|
goto unregister_endpoint_class;
|
|
|
|
err = transport_class_register(&iscsi_host_class);
|
|
if (err)
|
|
goto unregister_iface_class;
|
|
|
|
err = transport_class_register(&iscsi_connection_class);
|
|
if (err)
|
|
goto unregister_host_class;
|
|
|
|
err = transport_class_register(&iscsi_session_class);
|
|
if (err)
|
|
goto unregister_conn_class;
|
|
|
|
err = bus_register(&iscsi_flashnode_bus);
|
|
if (err)
|
|
goto unregister_session_class;
|
|
|
|
nls = netlink_kernel_create(&init_net, NETLINK_ISCSI, &cfg);
|
|
if (!nls) {
|
|
err = -ENOBUFS;
|
|
goto unregister_flashnode_bus;
|
|
}
|
|
|
|
iscsi_eh_timer_workq = create_singlethread_workqueue("iscsi_eh");
|
|
if (!iscsi_eh_timer_workq) {
|
|
err = -ENOMEM;
|
|
goto release_nls;
|
|
}
|
|
|
|
return 0;
|
|
|
|
release_nls:
|
|
netlink_kernel_release(nls);
|
|
unregister_flashnode_bus:
|
|
bus_unregister(&iscsi_flashnode_bus);
|
|
unregister_session_class:
|
|
transport_class_unregister(&iscsi_session_class);
|
|
unregister_conn_class:
|
|
transport_class_unregister(&iscsi_connection_class);
|
|
unregister_host_class:
|
|
transport_class_unregister(&iscsi_host_class);
|
|
unregister_iface_class:
|
|
class_unregister(&iscsi_iface_class);
|
|
unregister_endpoint_class:
|
|
class_unregister(&iscsi_endpoint_class);
|
|
unregister_transport_class:
|
|
class_unregister(&iscsi_transport_class);
|
|
return err;
|
|
}
|
|
|
|
static void __exit iscsi_transport_exit(void)
|
|
{
|
|
destroy_workqueue(iscsi_eh_timer_workq);
|
|
netlink_kernel_release(nls);
|
|
bus_unregister(&iscsi_flashnode_bus);
|
|
transport_class_unregister(&iscsi_connection_class);
|
|
transport_class_unregister(&iscsi_session_class);
|
|
transport_class_unregister(&iscsi_host_class);
|
|
class_unregister(&iscsi_endpoint_class);
|
|
class_unregister(&iscsi_iface_class);
|
|
class_unregister(&iscsi_transport_class);
|
|
}
|
|
|
|
module_init(iscsi_transport_init);
|
|
module_exit(iscsi_transport_exit);
|
|
|
|
MODULE_AUTHOR("Mike Christie <michaelc@cs.wisc.edu>, "
|
|
"Dmitry Yusupov <dmitry_yus@yahoo.com>, "
|
|
"Alex Aizman <itn780@yahoo.com>");
|
|
MODULE_DESCRIPTION("iSCSI Transport Interface");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_VERSION(ISCSI_TRANSPORT_VERSION);
|
|
MODULE_ALIAS_NET_PF_PROTO(PF_NETLINK, NETLINK_ISCSI);
|