korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-09-22 04:31:58 +08:00
Code Issues Packages Projects Releases Wiki Activity

NFS: don't let nfs_callback_svc exit on unexpected svc_recv errors (try #2)

Browse Source 
When svc_recv returns an unexpected error, nfs_callback_svc will print a
warning and exit. This problematic for several reasons. In particular,
it will cause the reference counts for the thread to be wrong, and no
new thread will be started until all nfs4 mounts are unmounted.

Rather than exiting on error from svc_recv, have the thread do a 1s
sleep and then retry the loop. This is unlikely to cause any harm, and
if the error turns out to be something temporary then it may be able to
recover.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
This commit is contained in:
Jeff Layton 2008-04-08 15:40:07 -04:00 committed by J. Bruce Fields
parent 9078dc0814
commit 06e02d66fa
1 changed files with 13 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
fs/nfs/callback.c
View File

@ -59,7 +59,7 @@ module_param_call(callback_tcpport, param_set_port, param_get_int,
static int
nfs_callback_svc(void *vrqstp)
{
int err;
int err, preverr = 0;
struct svc_rqst *rqstp = vrqstp;
set_freezable();
@ -74,14 +74,20 @@ nfs_callback_svc(void *vrqstp)
* Listen for a request on the socket
*/
err = svc_recv(rqstp, MAX_SCHEDULE_TIMEOUT);
if (err == -EAGAIN || err == -EINTR)
if (err == -EAGAIN || err == -EINTR) {
preverr = err;
continue;
if (err < 0) {
printk(KERN_WARNING
"%s: terminating on error %d\n",
__FUNCTION__, -err);
break;
}
if (err < 0) {
if (err != preverr) {
printk(KERN_WARNING "%s: unexpected error "
"from svc_recv (%d)\n", __func__, err);
preverr = err;
}
schedule_timeout_uninterruptible(HZ);
continue;
}
preverr = err;
svc_process(rqstp);
}
unlock_kernel();