Commit 272e2b89 authored by Jeff Layton's avatar Jeff Layton Committed by Chuck Lever
Browse files

nfsd: add tracepoint to nfsd_link() 



Observe the start of NFS LINK operations.

Signed-off-by: default avatarJeff Layton <jlayton@kernel.org>
Signed-off-by: default avatarChuck Lever <chuck.lever@oracle.com>
parent 2344b723

fs/nfsd/trace.h

+27 −0
Original line number Diff line number Diff line
@@ -2471,6 +2471,33 @@ TRACE_EVENT(nfsd_vfs_symlink, 
	)

);



TRACE_EVENT(nfsd_vfs_link,

	TP_PROTO(

		const struct svc_rqst *rqstp,

		const struct svc_fh *sfhp,

		const struct svc_fh *tfhp,

		const char *name,

		unsigned int namelen

	),

	TP_ARGS(rqstp, sfhp, tfhp, name, namelen),

	TP_STRUCT__entry(

		NFSD_TRACE_PROC_CALL_FIELDS(rqstp)

		__field(u32, sfh_hash)

		__field(u32, tfh_hash)

		__string_len(name, name, namelen)

	),

	TP_fast_assign(

		NFSD_TRACE_PROC_CALL_ASSIGNMENTS(rqstp);

		__entry->sfh_hash = knfsd_fh_hash(&sfhp->fh_handle);

		__entry->tfh_hash = knfsd_fh_hash(&tfhp->fh_handle);

		__assign_str(name);

	),

	TP_printk("xid=0x%08x src_fh=0x%08x tgt_fh=0x%08x name=%s",

		__entry->xid, __entry->sfh_hash, __entry->tfh_hash,

		__get_str(name)

	)

);



#endif /* _NFSD_TRACE_H */



#undef TRACE_INCLUDE_PATH

fs/nfsd/vfs.c

+2 −0
Original line number Diff line number Diff line
@@ -1721,6 +1721,8 @@ nfsd_link(struct svc_rqst *rqstp, struct svc_fh *ffhp, 
	__be32		err;

	int		host_err;



	trace_nfsd_vfs_link(rqstp, ffhp, tfhp, name, len);



	err = fh_verify(rqstp, ffhp, S_IFDIR, NFSD_MAY_CREATE);

	if (err)

		goto out;