Commit 2344b723 authored by Jeff Layton's avatar Jeff Layton Committed by Chuck Lever
Browse files

nfsd: add tracepoint to nfsd_symlink 



Observe the start of SYMLINK operations for all NFS versions.

Signed-off-by: default avatarJeff Layton <jlayton@kernel.org>
Signed-off-by: default avatarChuck Lever <chuck.lever@oracle.com>
parent 85b0b1f2

fs/nfsd/trace.h

+27 −0
Original line number Diff line number Diff line
@@ -2444,6 +2444,33 @@ TRACE_EVENT(nfsd_vfs_create, 
	)

);



TRACE_EVENT(nfsd_vfs_symlink,

	TP_PROTO(

		const struct svc_rqst *rqstp,

		const struct svc_fh *fhp,

		const char *name,

		unsigned int namelen,

		const char *target

	),

	TP_ARGS(rqstp, fhp, name, namelen, target),

	TP_STRUCT__entry(

		NFSD_TRACE_PROC_CALL_FIELDS(rqstp)

		__field(u32, fh_hash)

		__string_len(name, name, namelen)

		__string(target, target)

	),

	TP_fast_assign(

		NFSD_TRACE_PROC_CALL_ASSIGNMENTS(rqstp);

		__entry->fh_hash = knfsd_fh_hash(&fhp->fh_handle);

		__assign_str(name);

		__assign_str(target);

	),

	TP_printk("xid=0x%08x fh_hash=0x%08x name=%s target=%s",

		__entry->xid, __entry->fh_hash,

		__get_str(name), __get_str(target)

	)

);



#endif /* _NFSD_TRACE_H */



#undef TRACE_INCLUDE_PATH

fs/nfsd/vfs.c

+2 −0
Original line number Diff line number Diff line
@@ -1651,6 +1651,8 @@ nfsd_symlink(struct svc_rqst *rqstp, struct svc_fh *fhp, 
	__be32		err, cerr;

	int		host_err;



	trace_nfsd_vfs_symlink(rqstp, fhp, fname, flen, path);



	err = nfserr_noent;

	if (!flen || path[0] == '\0')

		goto out;