linux-kernel - [PATCH v3 04/17] nfsd: add nfsd_vfs

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Message-Id: <20250503-nfsd-tracepoints-v3-4-d89f445969af@kernel.org>
Date: Sat, 03 May 2025 11:11:20 -0400
From: Jeff Layton <jlayton@...nel.org>
To: Chuck Lever <chuck.lever@...cle.com>, 
 Olga Kornievskaia <okorniev@...hat.com>, Dai Ngo <Dai.Ngo@...cle.com>, 
 Tom Talpey <tom@...pey.com>, Trond Myklebust <trondmy@...nel.org>, 
 Anna Schumaker <anna@...nel.org>, NeilBrown <neil@...wn.name>
Cc: Sargun Dillon <sargun@...gun.me>, linux-nfs@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Jeff Layton <jlayton@...nel.org>
Subject: [PATCH v3 04/17] nfsd: add nfsd_vfs_create tracepoints

Signed-off-by: Jeff Layton <jlayton@...nel.org>
---
 fs/nfsd/nfs3proc.c |  3 +++
 fs/nfsd/trace.h    | 25 +++++++++++++++++++++++++
 fs/nfsd/vfs.c      |  2 ++
 3 files changed, 30 insertions(+)

diff --git a/fs/nfsd/nfs3proc.c b/fs/nfsd/nfs3proc.c
index 372bdcf5e07a5c835da240ecebb02e3576eb2ca6..5d2b081072e8c2e286c6815c34e5e58d4be15067 100644
--- a/fs/nfsd/nfs3proc.c
+++ b/fs/nfsd/nfs3proc.c
@@ -14,6 +14,7 @@
 #include "xdr3.h"
 #include "vfs.h"
 #include "filecache.h"
+#include "trace.h"
 
 #define NFSDDBG_FACILITY		NFSDDBG_PROC
 
@@ -266,6 +267,8 @@ nfsd3_create_file(struct svc_rqst *rqstp, struct svc_fh *fhp,
 	__be32 status;
 	int host_err;
 
+	trace_nfsd_vfs_create(rqstp, fhp, S_IFREG, argp->name, argp->len);
+
 	if (isdotent(argp->name, argp->len))
 		return nfserr_exist;
 	if (!(iap->ia_valid & ATTR_MODE))
diff --git a/fs/nfsd/trace.h b/fs/nfsd/trace.h
index 382849d7c321d6ded8213890c2e7075770aa716c..752d81629e04f805536295f00a16721f57272fbe 100644
--- a/fs/nfsd/trace.h
+++ b/fs/nfsd/trace.h
@@ -2391,6 +2391,31 @@ TRACE_EVENT(nfsd_lookup_dentry,
 	TP_printk("xid=0x%08x fh_hash=0x%08x name=%s",
 		  __entry->xid, __entry->fh_hash, __get_str(name))
 );
+
+TRACE_EVENT(nfsd_vfs_create,
+	TP_PROTO(struct svc_rqst *rqstp,
+		 struct svc_fh *fhp,
+		 umode_t type,
+		 const char *name,
+		 unsigned int len),
+	TP_ARGS(rqstp, fhp, type, name, len),
+	TP_STRUCT__entry(
+		SVC_RQST_ENDPOINT_FIELDS(rqstp)
+		__field(u32, fh_hash)
+		__field(umode_t, type)
+		__string_len(name, name, len)
+	),
+	TP_fast_assign(
+		SVC_RQST_ENDPOINT_ASSIGNMENTS(rqstp);
+		__entry->fh_hash = knfsd_fh_hash(&fhp->fh_handle);
+		__entry->type = type;
+		__assign_str(name);
+	),
+	TP_printk("xid=0x%08x fh_hash=0x%08x type=%s name=%s",
+		  __entry->xid, __entry->fh_hash,
+		  show_fs_file_type(__entry->type), __get_str(name))
+);
+
 #endif /* _NFSD_TRACE_H */
 
 #undef TRACE_INCLUDE_PATH
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index 276fbb572ead90fd07cde6922a697e07148926de..888572727d332dafd3e520f4801c4b0ca4e5c96c 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -1574,6 +1574,8 @@ nfsd_create(struct svc_rqst *rqstp, struct svc_fh *fhp,
 	__be32		err;
 	int		host_err;
 
+	trace_nfsd_vfs_create(rqstp, fhp, type, fname, flen);
+
 	if (isdotent(fname, flen))
 		return nfserr_exist;
 

-- 
2.49.0