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target: Add target_show_dynamic_sessions attribute helper

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This patch adds a new helper function that can be used by fabric driver
TPG attributes for dumping the list of active sessions with a dynamically
generated se_node_acl. (generate_node_acl=1).

It prints one se_node_acl->initiatorname per line, up to PAGE_SIZE which
is due to the current limitiation of single page attribute output within
sysfs and configfs code.

Note that if a session is referencing a explicit NodeACL, the InitiatorName
will not appear within dynamic_sessions output.

Reported-by: Andy Grover <agrover@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Nicholas Bellinger
2015-03-06 20:34:32 -08:00
parent d4c5dcacfa
commit f8e471f9eb
3 changed files with 30 additions and 0 deletions
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include/target/target_core_fabric.h
+1
View File
@@ -95,6 +95,7 @@ void transport_register_session(struct se_portal_group *,
struct se_node_acl *, struct se_session *, void *);
void target_get_session(struct se_session *);
void target_put_session(struct se_session *);
ssize_t target_show_dynamic_sessions(struct se_portal_group *, char *);
void transport_free_session(struct se_session *);
void target_put_nacl(struct se_node_acl *);
void transport_deregister_session_configfs(struct se_session *);
include/target/target_core_fabric_configfs.h
+5
View File
@@ -90,6 +90,11 @@ static struct target_fabric_tpg_attribute _fabric##_tpg_##_name = \
_fabric##_tpg_store_##_name);
#define TF_TPG_BASE_ATTR_RO(_fabric, _name) \
static struct target_fabric_tpg_attribute _fabric##_tpg_##_name = \
__CONFIGFS_EATTR_RO(_name, \
_fabric##_tpg_show_##_name);
CONFIGFS_EATTR_STRUCT(target_fabric_wwn, target_fabric_configfs);
#define TF_WWN_ATTR(_fabric, _name, _mode) \
static struct target_fabric_wwn_attribute _fabric##_wwn_##_name = \