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sunrpc: close connection when a request is irretrievably lost.

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If we drop a request in the sunrpc layer, either due kmalloc failure,
or due to a cache miss when we could not queue the request for later
replay, then close the connection to encourage the client to retry sooner.

Note that if the drop happens in the NFS layer, NFSERR_JUKEBOX
(aka NFS4ERR_DELAY) is returned to guide the client concerning
replay.

Signed-off-by: NeilBrown <neilb@suse.de>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
This commit is contained in:
NeilBrown 2010-08-12 17:04:07 +10:00 • committed by J. Bruce Fields
parent 0649752458
commit 1ebede86b8
4 changed files with 24 additions and 12 deletions
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10
include/linux/sunrpc/svcauth.h
View file

@ -108,9 +108,13 @@ struct auth_ops {
#define SVC_NEGATIVE 4
#define SVC_OK 5
#define SVC_DROP 6
#define SVC_DENIED 7
#define SVC_PENDING 8
#define SVC_COMPLETE 9
#define SVC_CLOSE 7 /* Like SVC_DROP, but request is definitely
* lost so if there is a tcp connection, it
* should be closed
*/
#define SVC_DENIED 8
#define SVC_PENDING 9
#define SVC_COMPLETE 10
extern int svc_authenticate(struct svc_rqst *rqstp, __be32 *authp);