[PATCH v4 05/18] nfsd: add nfsd_vfs_create tracepoints

cel
2025-05-03T19:59:46Z

Observe the start of file and directory creation for all NFS
versions.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---
fs/nfsd/nfs3proc.c | 3 +++
fs/nfsd/trace.h | 27 +++++++++++++++++++++++++++
fs/nfsd/vfs.c | 2 ++
3 files changed, 32 insertions(+)

diff --git a/fs/nfsd/nfs3proc.c b/fs/nfsd/nfs3proc.c
index 372bdcf5e07a..5d2b081072e8 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 661a870d62f5..a71d605fd7b7 100644
--- a/fs/nfsd/trace.h
+++ b/fs/nfsd/trace.h
@@ -2417,6 +2417,33 @@ TRACE_EVENT(nfsd_vfs_lookup,
)
);

+TRACE_EVENT(nfsd_vfs_create,
+ TP_PROTO(
+ const struct svc_rqst *rqstp,
+ const struct svc_fh *fhp,
+ umode_t type,
+ const char *name,
+ unsigned int len
+ ),
+ TP_ARGS(rqstp, fhp, type, name, len),
+ TP_STRUCT__entry(
+ NFSD_TRACE_PROC_CALL_FIELDS(rqstp)
+ __field(u32, fh_hash)
+ __field(umode_t, type)
+ __string_len(name, name, len)
+ ),
+ TP_fast_assign(
+ NFSD_TRACE_PROC_CALL_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 657ba0c2da14..cc0efc47dc25 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -1549,6 +1549,8 @@ 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