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authorNeilBrown <neilb@suse.de>2006-04-10 22:55:34 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-04-11 06:18:52 -0700
commitdfee55f06213a23b250ea63ba41caa461cdd5e72 (patch)
treecfee86e10c5f5406bf7f1fa98c2b5d73d66d259b /net/sunrpc/auth_gss/svcauth_gss.c
parentbb6e8a9f4005237401a45f1ea43db060ea5f9725 (diff)
[PATCH] knfsd: svcrpc: gss: don't call svc_take_page unnecessarily
We're using svc_take_page here to get another page for the tail in case one wasn't already allocated. But there isn't always guaranteed to be another page available. Also fix a typo that made us check the tail buffer for space when we meant to be checking the head buffer. Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu> Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'net/sunrpc/auth_gss/svcauth_gss.c')
-rw-r--r--net/sunrpc/auth_gss/svcauth_gss.c14
1 files changed, 8 insertions, 6 deletions
diff --git a/net/sunrpc/auth_gss/svcauth_gss.c b/net/sunrpc/auth_gss/svcauth_gss.c
index 4d7eb9e704d..d51e316c582 100644
--- a/net/sunrpc/auth_gss/svcauth_gss.c
+++ b/net/sunrpc/auth_gss/svcauth_gss.c
@@ -1122,18 +1122,20 @@ svcauth_gss_release(struct svc_rqst *rqstp)
integ_len))
BUG();
if (resbuf->page_len == 0
- && resbuf->tail[0].iov_len + RPC_MAX_AUTH_SIZE
+ && resbuf->head[0].iov_len + RPC_MAX_AUTH_SIZE
< PAGE_SIZE) {
BUG_ON(resbuf->tail[0].iov_len);
/* Use head for everything */
resv = &resbuf->head[0];
} else if (resbuf->tail[0].iov_base == NULL) {
- /* copied from nfsd4_encode_read */
- svc_take_page(rqstp);
- resbuf->tail[0].iov_base = page_address(rqstp
- ->rq_respages[rqstp->rq_resused-1]);
- rqstp->rq_restailpage = rqstp->rq_resused-1;
+ if (resbuf->head[0].iov_len + RPC_MAX_AUTH_SIZE
+ > PAGE_SIZE)
+ goto out_err;
+ resbuf->tail[0].iov_base =
+ resbuf->head[0].iov_base
+ + resbuf->head[0].iov_len;
resbuf->tail[0].iov_len = 0;
+ rqstp->rq_restailpage = 0;
resv = &resbuf->tail[0];
} else {
resv = &resbuf->tail[0];