[PATCH v4 09/18] nfsd: add tracepoint to nfsd_rename

cel
2025-05-03T19:59:49Z

Observe the start of RENAME operations for all NFS versions.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---
fs/nfsd/trace.h | 31 +++++++++++++++++++++++++++++++
fs/nfsd/vfs.c | 2 ++
2 files changed, 33 insertions(+)

diff --git a/fs/nfsd/trace.h b/fs/nfsd/trace.h
index e96585546d01..46091d7f2260 100644
--- a/fs/nfsd/trace.h
+++ b/fs/nfsd/trace.h
@@ -2522,6 +2522,37 @@ TRACE_EVENT(nfsd_vfs_unlink,
)
);

+TRACE_EVENT(nfsd_vfs_rename,
+ TP_PROTO(
+ const struct svc_rqst *rqstp,
+ const struct svc_fh *sfhp,
+ const struct svc_fh *tfhp,
+ const char *source,
+ unsigned int sourcelen,
+ const char *target,
+ unsigned int targetlen
+ ),
+ TP_ARGS(rqstp, sfhp, tfhp, source, sourcelen, target, targetlen),
+ TP_STRUCT__entry(
+ NFSD_TRACE_PROC_CALL_FIELDS(rqstp)
+ __field(u32, sfh_hash)
+ __field(u32, tfh_hash)
+ __string_len(source, source, sourcelen)
+ __string_len(target, target, targetlen)
+ ),
+ 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(source);
+ __assign_str(target);
+ ),
+ TP_printk("xid=0x%08x sfh_hash=0x%08x tfh_hash=0x%08x source=%s target=%s",
+ __entry->xid, __entry->sfh_hash, __entry->tfh_hash,
+ __get_str(source), __get_str(target)
+ )
+);
+
#endif /* _NFSD_TRACE_H */

#undef TRACE_INCLUDE_PATH
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index 820290e5328f..41314b2a8199 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -1840,6 +1840,8 @@ nfsd_rename(struct svc_rqst *rqstp, struct svc_fh *ffhp, char *fname, int flen,
int host_err;
bool close_cached = false;

+ trace_nfsd_vfs_rename(rqstp, ffhp, tfhp, fname, flen, tname, tlen);
+
err = fh_verify(rqstp, ffhp, S_IFDIR, NFSD_MAY_REMOVE);
if (err)
goto out;
--
2.49.0