diff options
| author | Mike Christie <michael.christie@oracle.com> | 2021-02-07 07:46:06 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2021-02-09 06:39:04 +0300 |
| commit | c8447e4c2eb77dbb96012ae96e7c83179cecf880 (patch) | |
| tree | b5b3bff8cf96a86916e36fb40198a0eaa7b1c083 /drivers/scsi/libiscsi.c | |
| parent | 25c400db2083732a5fbdd72f0d3a0337119b2fa5 (diff) | |
| download | linux-c8447e4c2eb77dbb96012ae96e7c83179cecf880.tar.xz | |
scsi: libiscsi: Reset max/exp cmdsn during recovery
If we lose the session then relogin, but the new cmdsn window has shrunk
(due to something like an admin changing a setting) we will have the old
exp/max_cmdsn values and will never be able to update them. For example,
max_cmdsn would be 64, but if on the target the user set the window to be
smaller then the target could try to return the max_cmdsn as 32. We will
see that new max_cmdsn in the rsp but because it's lower than the old
max_cmdsn when the window was larger we will not update it.
So this patch has us reset the window values during session cleanup so they
can be updated after a new login.
Link: https://lore.kernel.org/r/20210207044608.27585-8-michael.christie@oracle.com
Reviewed-by: Lee Duncan <lduncan@suse.com>
Signed-off-by: Mike Christie <michael.christie@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/libiscsi.c')
| -rw-r--r-- | drivers/scsi/libiscsi.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/scsi/libiscsi.c b/drivers/scsi/libiscsi.c index f64e2077754c..7ad11e42306d 100644 --- a/drivers/scsi/libiscsi.c +++ b/drivers/scsi/libiscsi.c @@ -3274,6 +3274,13 @@ int iscsi_conn_bind(struct iscsi_cls_session *cls_session, spin_unlock_bh(&session->frwd_lock); /* + * The target could have reduced it's window size between logins, so + * we have to reset max/exp cmdsn so we can see the new values. + */ + spin_lock_bh(&session->back_lock); + session->max_cmdsn = session->exp_cmdsn = session->cmdsn + 1; + spin_unlock_bh(&session->back_lock); + /* * Unblock xmitworker(), Login Phase will pass through. */ clear_bit(ISCSI_SUSPEND_BIT, &conn->suspend_rx); |