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Message-Id: <1452237348-2277-3-git-send-email-nab@daterainc.com>
Date: Fri, 8 Jan 2016 07:15:46 +0000
From: "Nicholas A. Bellinger" <nab@...erainc.com>
To: target-devel <target-devel@...r.kernel.org>
Cc: linux-scsi <linux-scsi@...r.kernel.org>,
lkml <linux-kernel@...r.kernel.org>,
Sagi Grimberg <sagig@...lanox.com>,
Christoph Hellwig <hch@....de>, Hannes Reinecke <hare@...e.de>,
Andy Grover <agrover@...hat.com>,
Vasu Dev <vasu.dev@...ux.intel.com>, Vu Pham <vu@...lanox.com>,
Nicholas Bellinger <nab@...ux-iscsi.org>
Subject: [PATCH 2/4] target: Remove useless set_initiator_node_queue_depth acl lookup
From: Nicholas Bellinger <nab@...ux-iscsi.org>
With the changes in place to obtain se_node_acl->acl_kref
from within core_tpg_del_initiator_node_acl() and auditing
existing users, it's clear there is no need to perform the
lookup during core_tpg_set_initiator_node_queue_depth().
This is because se_node_acl->acl_group is already protecting
the se_node_acl reference via configfs, and ->acl_group
shutdown in core_tpg_del_initiator_node_acl() can't occur
until core_tpg_set_initiator_node_queue_depth() completes.
Also, remove a related pointless wrapper in iscsi-target.
Cc: Sagi Grimberg <sagig@...lanox.com>
Cc: Christoph Hellwig <hch@....de>
Cc: Hannes Reinecke <hare@...e.de>
Cc: Andy Grover <agrover@...hat.com>
Signed-off-by: Nicholas Bellinger <nab@...ux-iscsi.org>
---
drivers/target/iscsi/iscsi_target_configfs.c | 6 +++---
drivers/target/iscsi/iscsi_target_tpg.c | 10 ----------
drivers/target/iscsi/iscsi_target_tpg.h | 2 --
drivers/target/target_core_tpg.c | 23 ++++-------------------
include/target/target_core_fabric.h | 2 +-
5 files changed, 8 insertions(+), 35 deletions(-)
diff --git a/drivers/target/iscsi/iscsi_target_configfs.c b/drivers/target/iscsi/iscsi_target_configfs.c
index 255204c..6469321 100644
--- a/drivers/target/iscsi/iscsi_target_configfs.c
+++ b/drivers/target/iscsi/iscsi_target_configfs.c
@@ -726,10 +726,10 @@ static ssize_t lio_target_nacl_cmdsn_depth_store(struct config_item *item,
if (iscsit_get_tpg(tpg) < 0)
return -EINVAL;
/*
- * iscsit_tpg_set_initiator_node_queue_depth() assumes force=1
+ * core_tpg_set_initiator_node_queue_depth() assumes force=1
*/
- ret = iscsit_tpg_set_initiator_node_queue_depth(tpg,
- config_item_name(acl_ci), cmdsn_depth, 1);
+ ret = core_tpg_set_initiator_node_queue_depth(se_tpg, se_nacl,
+ cmdsn_depth, 1);
pr_debug("LIO_Target_ConfigFS: %s/%s Set CmdSN Window: %u for"
"InitiatorName: %s\n", config_item_name(wwn_ci),
diff --git a/drivers/target/iscsi/iscsi_target_tpg.c b/drivers/target/iscsi/iscsi_target_tpg.c
index 23c95cd..0814e58 100644
--- a/drivers/target/iscsi/iscsi_target_tpg.c
+++ b/drivers/target/iscsi/iscsi_target_tpg.c
@@ -590,16 +590,6 @@ int iscsit_tpg_del_network_portal(
return iscsit_tpg_release_np(tpg_np, tpg, np);
}
-int iscsit_tpg_set_initiator_node_queue_depth(
- struct iscsi_portal_group *tpg,
- unsigned char *initiatorname,
- u32 queue_depth,
- int force)
-{
- return core_tpg_set_initiator_node_queue_depth(&tpg->tpg_se_tpg,
- initiatorname, queue_depth, force);
-}
-
int iscsit_ta_authentication(struct iscsi_portal_group *tpg, u32 authentication)
{
unsigned char buf1[256], buf2[256], *none = NULL;
diff --git a/drivers/target/iscsi/iscsi_target_tpg.h b/drivers/target/iscsi/iscsi_target_tpg.h
index 9db32bd..2da2119 100644
--- a/drivers/target/iscsi/iscsi_target_tpg.h
+++ b/drivers/target/iscsi/iscsi_target_tpg.h
@@ -26,8 +26,6 @@ extern struct iscsi_tpg_np *iscsit_tpg_add_network_portal(struct iscsi_portal_gr
int);
extern int iscsit_tpg_del_network_portal(struct iscsi_portal_group *,
struct iscsi_tpg_np *);
-extern int iscsit_tpg_set_initiator_node_queue_depth(struct iscsi_portal_group *,
- unsigned char *, u32, int);
extern int iscsit_ta_authentication(struct iscsi_portal_group *, u32);
extern int iscsit_ta_login_timeout(struct iscsi_portal_group *, u32);
extern int iscsit_ta_netif_timeout(struct iscsi_portal_group *, u32);
diff --git a/drivers/target/target_core_tpg.c b/drivers/target/target_core_tpg.c
index fb77fe1..550d6f8 100644
--- a/drivers/target/target_core_tpg.c
+++ b/drivers/target/target_core_tpg.c
@@ -371,30 +371,18 @@ void core_tpg_del_initiator_node_acl(struct se_node_acl *acl)
*/
int core_tpg_set_initiator_node_queue_depth(
struct se_portal_group *tpg,
- unsigned char *initiatorname,
+ struct se_node_acl *acl,
u32 queue_depth,
int force)
{
struct se_session *sess, *init_sess = NULL;
- struct se_node_acl *acl;
unsigned long flags;
int dynamic_acl = 0;
- mutex_lock(&tpg->acl_node_mutex);
- acl = __core_tpg_get_initiator_node_acl(tpg, initiatorname);
- if (!acl) {
- pr_err("Access Control List entry for %s Initiator"
- " Node %s does not exists for TPG %hu, ignoring"
- " request.\n", tpg->se_tpg_tfo->get_fabric_name(),
- initiatorname, tpg->se_tpg_tfo->tpg_get_tag(tpg));
- mutex_unlock(&tpg->acl_node_mutex);
- return -ENODEV;
- }
if (acl->dynamic_node_acl) {
acl->dynamic_node_acl = 0;
dynamic_acl = 1;
}
- mutex_unlock(&tpg->acl_node_mutex);
spin_lock_irqsave(&tpg->session_lock, flags);
list_for_each_entry(sess, &tpg->tpg_sess_list, sess_list) {
@@ -407,13 +395,12 @@ int core_tpg_set_initiator_node_queue_depth(
" operational. To forcefully change the queue"
" depth and force session reinstatement"
" use the \"force=1\" parameter.\n",
- tpg->se_tpg_tfo->get_fabric_name(), initiatorname);
+ tpg->se_tpg_tfo->get_fabric_name(),
+ acl->initiatorname);
spin_unlock_irqrestore(&tpg->session_lock, flags);
- mutex_lock(&tpg->acl_node_mutex);
if (dynamic_acl)
acl->dynamic_node_acl = 1;
- mutex_unlock(&tpg->acl_node_mutex);
return -EEXIST;
}
/*
@@ -464,13 +451,11 @@ int core_tpg_set_initiator_node_queue_depth(
pr_debug("Successfully changed queue depth to: %d for Initiator"
" Node: %s on %s Target Portal Group: %u\n", queue_depth,
- initiatorname, tpg->se_tpg_tfo->get_fabric_name(),
+ acl->initiatorname, tpg->se_tpg_tfo->get_fabric_name(),
tpg->se_tpg_tfo->tpg_get_tag(tpg));
- mutex_lock(&tpg->acl_node_mutex);
if (dynamic_acl)
acl->dynamic_node_acl = 1;
- mutex_unlock(&tpg->acl_node_mutex);
return 0;
}
diff --git a/include/target/target_core_fabric.h b/include/target/target_core_fabric.h
index de21130..7f83295 100644
--- a/include/target/target_core_fabric.h
+++ b/include/target/target_core_fabric.h
@@ -172,7 +172,7 @@ struct se_node_acl *core_tpg_get_initiator_node_acl(struct se_portal_group *tpg,
struct se_node_acl *core_tpg_check_initiator_node_acl(struct se_portal_group *,
unsigned char *);
int core_tpg_set_initiator_node_queue_depth(struct se_portal_group *,
- unsigned char *, u32, int);
+ struct se_node_acl *, u32, int);
int core_tpg_set_initiator_node_tag(struct se_portal_group *,
struct se_node_acl *, const char *);
int core_tpg_register(struct se_wwn *, struct se_portal_group *, int);
--
1.9.1
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