From: Steve French <sfrench@xxxxxxxxxx>
Previously CIFS added a function, sync_mid_result,
to better handle certain error conditions.
This patch adds the equivalent for SMB2 mids (the
functions are used by smb2_sendrcv2
which is added in the next patch)
Signed-off-by: Steve French <sfrench@xxxxxxxxxx>
Signed-off-by: Pavel Shilovsky <piastry@xxxxxxxxxxx>
---
fs/cifs/smb2transport.c | 58 +++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 58 insertions(+), 0 deletions(-)
diff --git a/fs/cifs/smb2transport.c b/fs/cifs/smb2transport.c
index 59aa1c0..2ca9943 100644
--- a/fs/cifs/smb2transport.c
+++ b/fs/cifs/smb2transport.c
@@ -244,6 +244,64 @@ smb2_mid_entry_free(struct smb2_mid_entry *mid_entry)
mempool_free(mid_entry, smb2_mid_poolp);
}
+/* This is similar to cifs's wait_for_response but obviously for smb2 mids */
+static int
+wait_for_smb2_response(struct TCP_Server_Info *server,
+ struct smb2_mid_entry *midq)
+{
+ int error;
+
+ error = wait_event_killable(server->response_q,
+ midq->mid_state != MID_REQUEST_SUBMITTED);
+ if (error < 0)
+ return -ERESTARTSYS;
+
+ return 0;
+}
+
+/* This is similar to cifs's sync_mid_result but for smb2 mids */
+static int
+sync_smb2_mid_result(struct smb2_mid_entry *mid, struct TCP_Server_Info *server)
+{
+ int rc = 0;
+
+ cFYI(1, "%s: cmd=%d mid=%lld state=%d", __func__,
+ le16_to_cpu(mid->command), mid->mid, mid->mid_state);
+
+ spin_lock(&GlobalMid_Lock);
+ /* ensure that it's no longer on the pending_mid_q */
+ list_del_init(&mid->qhead);
+
+ switch (mid->mid_state) {
+ case MID_RESPONSE_RECEIVED:
+ spin_unlock(&GlobalMid_Lock);
+ return rc;
+ case MID_REQUEST_SUBMITTED:
+ /* socket is going down, reject all calls */
+ if (server->tcpStatus == CifsExiting) {
+ cERROR(1, "%s: canceling mid=%lld cmd=0x%x state=%d",
+ __func__, mid->mid, le16_to_cpu(mid->command),
+ mid->mid_state);
+ rc = -EHOSTDOWN;
+ break;
+ }
+ case MID_RETRY_NEEDED:
+ rc = -EAGAIN;
+ break;
+ case MID_RESPONSE_MALFORMED:
+ rc = -EIO;
+ break;
+ default:
+ cERROR(1, "%s: invalid mid state mid=%lld state=%d", __func__,
+ mid->mid, mid->mid_state);
+ rc = -EIO;
+ }
+ spin_unlock(&GlobalMid_Lock);
+
+ smb2_mid_entry_free(mid);
+ return rc;
+}
+
static void
free_smb2_mid(struct smb2_mid_entry *mid)
{
--
1.7.1
--
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