[PATCH v3 08/17] nfsd: add tracepoint to nfsd_rename

[Jeff Layton]

Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx>
---
 fs/nfsd/trace.h | 28 ++++++++++++++++++++++++++++
 fs/nfsd/vfs.c   |  2 ++
 2 files changed, 30 insertions(+)

diff --git a/fs/nfsd/trace.h b/fs/nfsd/trace.h
index 24e3c32d9db48bd8bf51eb41dda46b889dfa9e8d..4e873ceca602098d2899c5ff2deee610ddb670a0 100644
--- a/fs/nfsd/trace.h
+++ b/fs/nfsd/trace.h
@@ -2484,6 +2484,34 @@ TRACE_EVENT(nfsd_vfs_unlink,
 		  __entry->xid, __entry->fh_hash,
 		  __get_str(name))
 );
+
+TRACE_EVENT(nfsd_vfs_rename,
+	TP_PROTO(struct svc_rqst *rqstp,
+		 struct svc_fh *sfhp,
+		 struct svc_fh *tfhp,
+		 const char *name,
+		 unsigned int namelen,
+		 const char *tgt,
+		 unsigned int tgtlen),
+	TP_ARGS(rqstp, sfhp, tfhp, name, namelen, tgt, tgtlen),
+	TP_STRUCT__entry(
+		SVC_RQST_ENDPOINT_FIELDS(rqstp)
+		__field(u32, sfh_hash)
+		__field(u32, tfh_hash)
+		__string_len(name, name, namelen)
+		__string_len(tgt, tgt, tgtlen)
+	),
+	TP_fast_assign(
+		SVC_RQST_ENDPOINT_ASSIGNMENTS(rqstp);
+		__entry->sfh_hash = knfsd_fh_hash(&sfhp->fh_handle);
+		__entry->tfh_hash = knfsd_fh_hash(&tfhp->fh_handle);
+		__assign_str(name);
+		__assign_str(tgt);
+	),
+	TP_printk("xid=0x%08x sfh_hash=0x%08x tfh_hash=0x%08x name=%s target=%s",
+		  __entry->xid, __entry->sfh_hash, __entry->tfh_hash,
+		  __get_str(name), __get_str(tgt))
+);
 #endif /* _NFSD_TRACE_H */
 
 #undef TRACE_INCLUDE_PATH
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index bd19e5926ef198279e39ac9ef1873eab289cb4a0..9fd5f7d277b452e12a2d5854b9d3ff79418a8818 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -1865,6 +1865,8 @@ 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