[PATCH 3.4 090/214] nfsd: dont run get_file if nfs4_preprocess_stateid_op return error

From: Greg Kroah-Hartman
Date: Thu Jun 05 2014 - 00:55:55 EST


3.4-stable review patch. If anyone has any objections, please let me know.

------------------

From: fanchaoting <fanchaoting@xxxxxxxxxxxxxx>

commit b022032e195ffca83d7002d6b84297d796ed443b upstream.

we should return error status directly when nfs4_preprocess_stateid_op
return error.

Signed-off-by: fanchaoting <fanchaoting@xxxxxxxxxxxxxx>
Signed-off-by: J. Bruce Fields <bfields@xxxxxxxxxx>
[bwh: Backported to 3.2: adjust context]
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
Cc: Rui Xiang <rui.xiang@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
fs/nfsd/nfs4proc.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)

--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -904,14 +904,14 @@ nfsd4_write(struct svc_rqst *rqstp, stru

nfs4_lock_state();
status = nfs4_preprocess_stateid_op(cstate, stateid, WR_STATE, &filp);
- if (filp)
- get_file(filp);
- nfs4_unlock_state();
-
if (status) {
+ nfs4_unlock_state();
dprintk("NFSD: nfsd4_write: couldn't process stateid!\n");
return status;
}
+ if (filp)
+ get_file(filp);
+ nfs4_unlock_state();

cnt = write->wr_buflen;
write->wr_how_written = write->wr_stable_how;


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