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nfsd: add trace events

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For now just a few simple events to trace the layout stateid lifetime, but
these already were enough to find several bugs in the Linux client layout
stateid handling.

Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Christoph Hellwig 2014-08-16 19:02:22 -05:00
parent 18d1aef89e
commit 31ef83dc05
5 changed files with 85 additions and 3 deletions
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6
fs/nfsd/nfs4proc.c
View file

@ -44,6 +44,7 @@
#include "netns.h"
#include "acl.h"
#include "pnfs.h"
#include "trace.h"
#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
#include <linux/security.h>
@ -1298,8 +1299,10 @@ nfsd4_layoutget(struct svc_rqst *rqstp,
nfserr = nfsd4_preprocess_layout_stateid(rqstp, cstate, &lgp->lg_sid,
true, lgp->lg_layout_type, &ls);
if (nfserr)
if (nfserr) {
trace_layout_get_lookup_fail(&lgp->lg_sid);
goto out;
}
nfserr = nfserr_recallconflict;
if (atomic_read(&ls->ls_stid.sc_file->fi_lo_recalls))
@ -1359,6 +1362,7 @@ nfsd4_layoutcommit(struct svc_rqst *rqstp,
false, lcp->lc_layout_type,
&ls);
if (nfserr) {
trace_layout_commit_lookup_fail(&lcp->lc_sid);
/* fixup error code as per RFC5661 */
if (nfserr == nfserr_bad_stateid)
nfserr = nfserr_badlayout;