[PATCH v4 08/18] nfsd: add tracepoints for unlink events

cel
2025-05-03T19:59:48Z

Observe the start of UNLINK, REMOVE, and RMDIR 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 | 24 ++++++++++++++++++++++++
fs/nfsd/vfs.c | 2 ++
2 files changed, 26 insertions(+)

diff --git a/fs/nfsd/trace.h b/fs/nfsd/trace.h
index acbf94cfb720..e96585546d01 100644
--- a/fs/nfsd/trace.h
+++ b/fs/nfsd/trace.h
@@ -2498,6 +2498,30 @@ TRACE_EVENT(nfsd_vfs_link,
)
);

+TRACE_EVENT(nfsd_vfs_unlink,
+ TP_PROTO(
+ const struct svc_rqst *rqstp,
+ const struct svc_fh *fhp,
+ const char *name,
+ unsigned int len
+ ),
+ TP_ARGS(rqstp, fhp, name, len),
+ TP_STRUCT__entry(
+ NFSD_TRACE_PROC_CALL_FIELDS(rqstp)
+ __field(u32, fh_hash)
+ __string_len(name, name, len)
+ ),
+ TP_fast_assign(
+ NFSD_TRACE_PROC_CALL_ASSIGNMENTS(rqstp);
+ __entry->fh_hash = knfsd_fh_hash(&fhp->fh_handle);
+ __assign_str(name);
+ ),
+ TP_printk("xid=0x%08x fh_hash=0x%08x name=%s",
+ __entry->xid, __entry->fh_hash,
+ __get_str(name)
+ )
+);
+
#endif /* _NFSD_TRACE_H */

#undef TRACE_INCLUDE_PATH
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index 30702f36db98..820290e5328f 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -1998,6 +1998,8 @@ nfsd_unlink(struct svc_rqst *rqstp, struct svc_fh *fhp, int type,
__be32 err;
int host_err;

+ trace_nfsd_vfs_unlink(rqstp, fhp, fname, flen);
+
err = nfserr_acces;
if (!flen || isdotent(fname, flen))
goto out;
--
2.49.0