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| author | Nicholas Bellinger <nab@linux-iscsi.org> | 2015-03-07 05:34:32 +0100 |
|---|---|---|
| committer | Nicholas Bellinger <nab@linux-iscsi.org> | 2015-03-07 06:24:53 +0100 |
| commit | f8e471f9eb9068bf5ac8c6a04da74329a442f75a (patch) | |
| tree | 043f0d1b6029db33812fccfad085676806a96872 /drivers/target | |
| parent | target: rewrite fd_execute_write_same (diff) | |
| download | linux-f8e471f9eb9068bf5ac8c6a04da74329a442f75a.tar.xz linux-f8e471f9eb9068bf5ac8c6a04da74329a442f75a.zip | |
target: Add target_show_dynamic_sessions attribute helper
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>
Diffstat (limited to 'drivers/target')
| -rw-r--r-- | drivers/target/target_core_transport.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c index 0adc0f650213..e06c136ff839 100644 --- a/drivers/target/target_core_transport.c +++ b/drivers/target/target_core_transport.c @@ -404,6 +404,30 @@ void target_put_session(struct se_session *se_sess) } EXPORT_SYMBOL(target_put_session); +ssize_t target_show_dynamic_sessions(struct se_portal_group *se_tpg, char *page) +{ + struct se_session *se_sess; + ssize_t len = 0; + + spin_lock_bh(&se_tpg->session_lock); + list_for_each_entry(se_sess, &se_tpg->tpg_sess_list, sess_list) { + if (!se_sess->se_node_acl) + continue; + if (!se_sess->se_node_acl->dynamic_node_acl) + continue; + if (strlen(se_sess->se_node_acl->initiatorname) + 1 + len > PAGE_SIZE) + break; + + len += snprintf(page + len, PAGE_SIZE - len, "%s\n", + se_sess->se_node_acl->initiatorname); + len += 1; /* Include NULL terminator */ + } + spin_unlock_bh(&se_tpg->session_lock); + + return len; +} +EXPORT_SYMBOL(target_show_dynamic_sessions); + static void target_complete_nacl(struct kref *kref) { struct se_node_acl *nacl = container_of(kref, |