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CIFS: Delete echo_retries module parm

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It's the essential step before respecting MaxMpxCount value during
negotiating because we will keep only one extra slot for sending
echo requests. If there is no response during two echo intervals -
reconnect the tcp session.

Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <sfrench@us.ibm.com>
This commit is contained in:
Pavel Shilovsky 2012-02-21 16:50:23 +03:00 committed by Steve French
parent bc205ed19b
commit 6dae51a585
4 changed files with 15 additions and 17 deletions
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6
fs/cifs/README
View File

@ -753,10 +753,6 @@ module loading or during the runtime by using the interface
i.e. echo "value" > /sys/module/cifs/parameters/<param>
1. echo_retries - The number of echo attempts before giving up and
reconnecting to the server. The default is 5. The value 0
means never reconnect.
2. enable_oplocks - Enable or disable oplocks. Oplocks are enabled by default.
1. enable_oplocks - Enable or disable oplocks. Oplocks are enabled by default.
[Y/y/1]. To disable use any of [N/n/0].

5
fs/cifs/cifsfs.c
View File

@ -77,11 +77,6 @@ unsigned int cifs_max_pending = CIFS_MAX_REQ;
module_param(cifs_max_pending, int, 0444);
MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. "
"Default: 32767 Range: 2 to 32767.");
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.");
module_param(enable_oplocks, bool, 0644);
MODULE_PARM_DESC(enable_oplocks, "Enable or disable oplocks (bool). Default:"
"y/Y/1");

3
fs/cifs/cifsglob.h
View File

@ -1038,9 +1038,6 @@ 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;
#ifdef CONFIG_CIFS_ACL
GLOBAL_EXTERN struct rb_root uidtree;
GLOBAL_EXTERN struct rb_root gidtree;

18
fs/cifs/connect.c
View File

@ -373,12 +373,22 @@ allocate_buffers(struct TCP_Server_Info *server)
static bool
server_unresponsive(struct TCP_Server_Info *server)
{
if (echo_retries > 0 && server->tcpStatus == CifsGood &&
time_after(jiffies, server->lstrp +
(echo_retries * SMB_ECHO_INTERVAL))) {
/*
* We need to wait 2 echo intervals to make sure we handle such
* situations right:
* 1s client sends a normal SMB request
* 2s client gets a response
* 30s echo workqueue job pops, and decides we got a response recently
* and don't need to send another
* ...
* 65s kernel_recvmsg times out, and we see that we haven't gotten
* a response in >60s.
*/
if (server->tcpStatus == CifsGood &&
time_after(jiffies, server->lstrp + 2 * SMB_ECHO_INTERVAL)) {
cERROR(1, "Server %s has not responded in %d seconds. "
"Reconnecting...", server->hostname,
(echo_retries * SMB_ECHO_INTERVAL / HZ));
(2 * SMB_ECHO_INTERVAL) / HZ);
cifs_reconnect(server);
wake_up(&server->response_q);
return true;