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nfsd: add tracepoint to nfsd_link()

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Observe the start of NFS LINK operations.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Jeff Layton 2025-05-03 15:59:25 -04:00 committed by Chuck Lever
parent 2344b72302
commit 272e2b89b8
2 changed files with 29 additions and 0 deletions
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27
fs/nfsd/trace.h
View File

@ -2471,6 +2471,33 @@ TRACE_EVENT(nfsd_vfs_symlink,
)
);
TRACE_EVENT(nfsd_vfs_link,
TP_PROTO(
const struct svc_rqst *rqstp,
const struct svc_fh *sfhp,
const struct svc_fh *tfhp,
const char *name,
unsigned int namelen
),
TP_ARGS(rqstp, sfhp, tfhp, name, namelen),
TP_STRUCT__entry(
NFSD_TRACE_PROC_CALL_FIELDS(rqstp)
__field(u32, sfh_hash)
__field(u32, tfh_hash)
__string_len(name, name, namelen)
),
TP_fast_assign(
NFSD_TRACE_PROC_CALL_ASSIGNMENTS(rqstp);
__entry->sfh_hash = knfsd_fh_hash(&sfhp->fh_handle);
__entry->tfh_hash = knfsd_fh_hash(&tfhp->fh_handle);
__assign_str(name);
),
TP_printk("xid=0x%08x src_fh=0x%08x tgt_fh=0x%08x name=%s",
__entry->xid, __entry->sfh_hash, __entry->tfh_hash,
__get_str(name)
)
);
#endif /* _NFSD_TRACE_H */
#undef TRACE_INCLUDE_PATH

2
fs/nfsd/vfs.c
View File

@ -1721,6 +1721,8 @@ nfsd_link(struct svc_rqst *rqstp, struct svc_fh *ffhp,
__be32 err;
int host_err;
trace_nfsd_vfs_link(rqstp, ffhp, tfhp, name, len);
err = fh_verify(rqstp, ffhp, S_IFDIR, NFSD_MAY_CREATE);
if (err)
goto out;