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scsi: iscsi: Report connection state in sysfs

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If an iSCSI connection happens to fail while the daemon isn't running (due
to a crash or for another reason), the kernel failure report is not
received.  When the daemon restarts, there is insufficient kernel state in
sysfs for it to know that this happened.  open-iscsi tries to reopen every
connection, but on different initiators, we'd like to know which
connections have failed.

There is session->state, but that has a different lifetime than an iSCSI
connection, so it doesn't directly reflect the connection state.

[mkp: typos]

Link: https://lore.kernel.org/r/20200317233422.532961-1-krisman@collabora.com
Cc: Khazhismel Kumykov <khazhy@google.com>
Suggested-by: Junho Ryu <jayr@google.com>
Reviewed-by: Lee Duncan <lduncan@suse.com>
Signed-off-by: Gabriel Krisman Bertazi <krisman@collabora.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Gabriel Krisman Bertazi
2020-03-17 19:34:22 -04:00
committed by Martin K. Petersen
parent 1a0275239e
commit 82b8cf40bf
3 changed files with 42 additions and 2 deletions
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7
drivers/scsi/libiscsi.c
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@@ -3153,13 +3153,18 @@ void iscsi_conn_stop(struct iscsi_cls_conn *cls_conn, int flag)
switch (flag) {
case STOP_CONN_RECOVER:
cls_conn->state = ISCSI_CONN_FAILED;
break;
case STOP_CONN_TERM:
iscsi_start_session_recovery(session, conn, flag);
cls_conn->state = ISCSI_CONN_DOWN;
break;
default:
iscsi_conn_printk(KERN_ERR, conn,
"invalid stop flag %d\n", flag);
return;
}
iscsi_start_session_recovery(session, conn, flag);
}
EXPORT_SYMBOL_GPL(iscsi_conn_stop);