From: Nicholas Bellinger <n...@linux-iscsi.org>
This patch converts the MODE_SENSE special case in pscsi_transport_complete()
to use RCU read path macros for se_node_acl->lun_entry_hlist[] access.
Cc: Hannes Reinecke <h...@suse.de>
Cc: Christoph Hellwig <h...@lst.de>
Cc: Sagi Grimberg <sa...@mellanox.com>
Signed-off-by: Nicholas Bellinger <n...@linux-iscsi.org>
---
drivers/target/target_core_pscsi.c | 14 ++++++++++++--
1 file changed, 12 insertions(+), 2 deletions(-)
diff --git a/drivers/target/target_core_pscsi.c
b/drivers/target/target_core_pscsi.c
index f6c954c..8bffcd8 100644
--- a/drivers/target/target_core_pscsi.c
+++ b/drivers/target/target_core_pscsi.c
@@ -634,12 +634,22 @@ static void pscsi_transport_complete(struct se_cmd *cmd,
struct scatterlist *sg,
* Hack to make sure that Write-Protect modepage is set if R/O mode is
* forced.
*/
- if (!cmd->se_deve || !cmd->data_length)
+ if (!cmd->data_length)
goto after_mode_sense;
if (((cdb[0] == MODE_SENSE) || (cdb[0] == MODE_SENSE_10)) &&
(status_byte(result) << 1) == SAM_STAT_GOOD) {
- if (cmd->se_deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY) {
+ struct se_session *sess = cmd->se_sess;
+ struct se_dev_entry *deve;
+ u32 lun = cmd->orig_fe_lun;
+ bool read_only;
+
+ rcu_read_lock();
+ deve = rcu_dereference(sess->se_node_acl->lun_entry_hlist[lun]);
+ read_only = (deve->lun_flags & TRANSPORT_LUNFLAGS_READ_ONLY);
+ rcu_read_unlock();
+
+ if (read_only) {
unsigned char *buf;
buf = transport_kmap_data_sg(cmd);
--
1.9.1
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