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-rw-r--r--fs/cifs/cifsfs.c6
-rw-r--r--fs/cifs/cifsglob.h3
-rw-r--r--fs/cifs/connect.c21
3 files changed, 25 insertions, 5 deletions
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index d9f652a522a6..99d777a03dd0 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -77,7 +77,11 @@ unsigned int cifs_max_pending = CIFS_MAX_REQ;
module_param(cifs_max_pending, int, 0);
MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. "
"Default: 50 Range: 2 to 256");
-
+unsigned short echo_retries = 5;
+module_param(echo_retries, ushort, 0644);
+MODULE_PARM_DESC(echo_retries, "Number of echo attempts before giving up and "
+ "reconnecting server. Default: 5. 0 means "
+ "never reconnect.");
extern mempool_t *cifs_sm_req_poolp;
extern mempool_t *cifs_req_poolp;
extern mempool_t *cifs_mid_poolp;
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index 9c728dd5b146..7040abc638fa 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -804,6 +804,9 @@ GLOBAL_EXTERN unsigned int cifs_min_rcv; /* min size of big ntwrk buf pool */
GLOBAL_EXTERN unsigned int cifs_min_small; /* min size of small buf pool */
GLOBAL_EXTERN unsigned int cifs_max_pending; /* MAX requests at once to server*/
+/* reconnect after this many failed echo attempts */
+GLOBAL_EXTERN unsigned short echo_retries;
+
void cifs_oplock_break(struct work_struct *work);
void cifs_oplock_break_get(struct cifsFileInfo *cfile);
void cifs_oplock_break_put(struct cifsFileInfo *cfile);
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index f38ca084c9d2..f5d7b59a3553 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -186,6 +186,7 @@ cifs_reconnect(struct TCP_Server_Info *server)
kfree(server->session_key.response);
server->session_key.response = NULL;
server->session_key.len = 0;
+ server->lstrp = jiffies;
mutex_unlock(&server->srv_mutex);
/* mark submitted MIDs for retry and issue callback */
@@ -420,7 +421,20 @@ cifs_demultiplex_thread(struct TCP_Server_Info *server)
smb_msg.msg_control = NULL;
smb_msg.msg_controllen = 0;
pdu_length = 4; /* enough to get RFC1001 header */
+
incomplete_rcv:
+ if (echo_retries > 0 &&
+ time_after(jiffies, server->lstrp +
+ (echo_retries * SMB_ECHO_INTERVAL))) {
+ cERROR(1, "Server %s has not responded in %d seconds. "
+ "Reconnecting...", server->hostname,
+ (echo_retries * SMB_ECHO_INTERVAL / HZ));
+ cifs_reconnect(server);
+ csocket = server->ssocket;
+ wake_up(&server->response_q);
+ continue;
+ }
+
length =
kernel_recvmsg(csocket, &smb_msg,
&iov, 1, pdu_length, 0 /* BB other flags? */);
@@ -581,6 +595,8 @@ incomplete_rcv:
}
mid_entry = NULL;
+ server->lstrp = jiffies;
+
spin_lock(&GlobalMid_Lock);
list_for_each_safe(tmp, tmp2, &server->pending_mid_q) {
mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
@@ -629,10 +645,6 @@ multi_t2_fnd:
#ifdef CONFIG_CIFS_STATS2
mid_entry->when_received = jiffies;
#endif
- /* so we do not time out requests to server
- which is still responding (since server could
- be busy but not dead) */
- server->lstrp = jiffies;
break;
}
mid_entry = NULL;
@@ -1685,6 +1697,7 @@ cifs_get_tcp_session(struct smb_vol *volume_info)
volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
tcp_ses->session_estab = false;
tcp_ses->sequence_number = 0;
+ tcp_ses->lstrp = jiffies;
INIT_LIST_HEAD(&tcp_ses->tcp_ses_list);
INIT_LIST_HEAD(&tcp_ses->smb_ses_list);
INIT_DELAYED_WORK(&tcp_ses->echo, cifs_echo_request);