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Message-Id: <20150203231725.895465252@linuxfoundation.org>
Date: Tue, 3 Feb 2015 15:17:25 -0800
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org,
target-devel <target-devel@...r.kernel.org>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Hannes Reinecke <hare@...e.de>,
Nicholas Bellinger <nab@...ux-iscsi.org>
Subject: [PATCH 3.10 43/51] tcm_loop: Fix wrong I_T nexus association
3.10-stable review patch. If anyone has any objections, please let me know.
------------------
From: Hannes Reinecke <hare@...e.de>
commit 506787a2c7daed45f0a213674ca706cbc83a9089 upstream.
tcm_loop has the I_T nexus associated with the HBA. This causes
commands to become misdirected if the HBA has more than one
target portal group; any command is then being sent to the
first target portal group instead of the correct one.
The nexus needs to be associated with the target portal group
instead.
Signed-off-by: Hannes Reinecke <hare@...e.de>
Signed-off-by: Nicholas Bellinger <nab@...ux-iscsi.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
drivers/target/loopback/tcm_loop.c | 29 ++++++++++++++---------------
drivers/target/loopback/tcm_loop.h | 7 +------
2 files changed, 15 insertions(+), 21 deletions(-)
--- a/drivers/target/loopback/tcm_loop.c
+++ b/drivers/target/loopback/tcm_loop.c
@@ -179,7 +179,7 @@ static void tcm_loop_submission_work(str
goto out_done;
}
- tl_nexus = tl_hba->tl_nexus;
+ tl_nexus = tl_tpg->tl_nexus;
if (!tl_nexus) {
scmd_printk(KERN_ERR, sc, "TCM_Loop I_T Nexus"
" does not exist\n");
@@ -258,20 +258,20 @@ static int tcm_loop_device_reset(struct
*/
tl_hba = *(struct tcm_loop_hba **)shost_priv(sc->device->host);
/*
+ * Locate the tl_tpg and se_tpg pointers from TargetID in sc->device->id
+ */
+ tl_tpg = &tl_hba->tl_hba_tpgs[sc->device->id];
+ se_tpg = &tl_tpg->tl_se_tpg;
+ /*
* Locate the tl_nexus and se_sess pointers
*/
- tl_nexus = tl_hba->tl_nexus;
+ tl_nexus = tl_tpg->tl_nexus;
if (!tl_nexus) {
pr_err("Unable to perform device reset without"
" active I_T Nexus\n");
return FAILED;
}
se_sess = tl_nexus->se_sess;
- /*
- * Locate the tl_tpg and se_tpg pointers from TargetID in sc->device->id
- */
- tl_tpg = &tl_hba->tl_hba_tpgs[sc->device->id];
- se_tpg = &tl_tpg->tl_se_tpg;
tl_cmd = kmem_cache_zalloc(tcm_loop_cmd_cache, GFP_KERNEL);
if (!tl_cmd) {
@@ -879,8 +879,8 @@ static int tcm_loop_make_nexus(
struct tcm_loop_nexus *tl_nexus;
int ret = -ENOMEM;
- if (tl_tpg->tl_hba->tl_nexus) {
- pr_debug("tl_tpg->tl_hba->tl_nexus already exists\n");
+ if (tl_tpg->tl_nexus) {
+ pr_debug("tl_tpg->tl_nexus already exists\n");
return -EEXIST;
}
se_tpg = &tl_tpg->tl_se_tpg;
@@ -915,7 +915,7 @@ static int tcm_loop_make_nexus(
*/
__transport_register_session(se_tpg, tl_nexus->se_sess->se_node_acl,
tl_nexus->se_sess, tl_nexus);
- tl_tpg->tl_hba->tl_nexus = tl_nexus;
+ tl_tpg->tl_nexus = tl_nexus;
pr_debug("TCM_Loop_ConfigFS: Established I_T Nexus to emulated"
" %s Initiator Port: %s\n", tcm_loop_dump_proto_id(tl_hba),
name);
@@ -931,9 +931,8 @@ static int tcm_loop_drop_nexus(
{
struct se_session *se_sess;
struct tcm_loop_nexus *tl_nexus;
- struct tcm_loop_hba *tl_hba = tpg->tl_hba;
- tl_nexus = tpg->tl_hba->tl_nexus;
+ tl_nexus = tpg->tl_nexus;
if (!tl_nexus)
return -ENODEV;
@@ -949,13 +948,13 @@ static int tcm_loop_drop_nexus(
}
pr_debug("TCM_Loop_ConfigFS: Removing I_T Nexus to emulated"
- " %s Initiator Port: %s\n", tcm_loop_dump_proto_id(tl_hba),
+ " %s Initiator Port: %s\n", tcm_loop_dump_proto_id(tpg->tl_hba),
tl_nexus->se_sess->se_node_acl->initiatorname);
/*
* Release the SCSI I_T Nexus to the emulated SAS Target Port
*/
transport_deregister_session(tl_nexus->se_sess);
- tpg->tl_hba->tl_nexus = NULL;
+ tpg->tl_nexus = NULL;
kfree(tl_nexus);
return 0;
}
@@ -971,7 +970,7 @@ static ssize_t tcm_loop_tpg_show_nexus(
struct tcm_loop_nexus *tl_nexus;
ssize_t ret;
- tl_nexus = tl_tpg->tl_hba->tl_nexus;
+ tl_nexus = tl_tpg->tl_nexus;
if (!tl_nexus)
return -ENODEV;
--- a/drivers/target/loopback/tcm_loop.h
+++ b/drivers/target/loopback/tcm_loop.h
@@ -25,11 +25,6 @@ struct tcm_loop_tmr {
};
struct tcm_loop_nexus {
- int it_nexus_active;
- /*
- * Pointer to Linux/SCSI HBA from linux/include/scsi_host.h
- */
- struct scsi_host *sh;
/*
* Pointer to TCM session for I_T Nexus
*/
@@ -45,6 +40,7 @@ struct tcm_loop_tpg {
atomic_t tl_tpg_port_count;
struct se_portal_group tl_se_tpg;
struct tcm_loop_hba *tl_hba;
+ struct tcm_loop_nexus *tl_nexus;
};
struct tcm_loop_hba {
@@ -53,7 +49,6 @@ struct tcm_loop_hba {
struct se_hba_s *se_hba;
struct se_lun *tl_hba_lun;
struct se_port *tl_hba_lun_sep;
- struct tcm_loop_nexus *tl_nexus;
struct device dev;
struct Scsi_Host *sh;
struct tcm_loop_tpg tl_hba_tpgs[TL_TPGS_PER_HBA];
--
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