Commit f628d462 authored by Olga Kornievskaia's avatar Olga Kornievskaia Committed by Trond Myklebust
Browse files

NFSv4.2 add tracepoint to SEEK 



Add a tracepoint to the SEEK operation.

Signed-off-by: default avatarOlga Kornievskaia <kolga@netapp.com>
Signed-off-by: default avatarTrond Myklebust <trond.myklebust@hammerspace.com>
parent 17f09d3f

fs/nfs/nfs42proc.c

+1 −0
Original line number Diff line number Diff line
@@ -678,6 +678,7 @@ static loff_t _nfs42_proc_llseek(struct file *filep, 


	status = nfs4_call_sync(server->client, server, &msg,

				&args.seq_args, &res.seq_res, 0);

	trace_nfs4_llseek(inode, &args, &res, status);

	if (status == -ENOTSUPP)

		server->caps &= ~NFS_CAP_SEEK;

	if (status)

fs/nfs/nfs4trace.h

+74 −0
Original line number Diff line number Diff line
@@ -2054,6 +2054,80 @@ TRACE_EVENT(ff_layout_commit_error, 
		)

);



TRACE_DEFINE_ENUM(NFS4_CONTENT_DATA);

TRACE_DEFINE_ENUM(NFS4_CONTENT_HOLE);



#define show_llseek_mode(what)			\

	__print_symbolic(what,			\

		{ NFS4_CONTENT_DATA, "DATA" },		\

		{ NFS4_CONTENT_HOLE, "HOLE" })



#ifdef CONFIG_NFS_V4_2

TRACE_EVENT(nfs4_llseek,

		TP_PROTO(

			const struct inode *inode,

			const struct nfs42_seek_args *args,

			const struct nfs42_seek_res *res,

			int error

		),



		TP_ARGS(inode, args, res, error),



		TP_STRUCT__entry(

			__field(unsigned long, error)

			__field(u32, fhandle)

			__field(u32, fileid)

			__field(dev_t, dev)

			__field(int, stateid_seq)

			__field(u32, stateid_hash)

			__field(loff_t, offset_s)

			__field(u32, what)

			__field(loff_t, offset_r)

			__field(u32, eof)

		),



		TP_fast_assign(

			const struct nfs_inode *nfsi = NFS_I(inode);

			const struct nfs_fh *fh = args->sa_fh;



			__entry->fileid = nfsi->fileid;

			__entry->dev = inode->i_sb->s_dev;

			__entry->fhandle = nfs_fhandle_hash(fh);

			__entry->offset_s = args->sa_offset;

			__entry->stateid_seq =

				be32_to_cpu(args->sa_stateid.seqid);

			__entry->stateid_hash =

				nfs_stateid_hash(&args->sa_stateid);

			__entry->what = args->sa_what;

			if (error) {

				__entry->error = -error;

				__entry->offset_r = 0;

				__entry->eof = 0;

			} else {

				__entry->error = 0;

				__entry->offset_r = res->sr_offset;

				__entry->eof = res->sr_eof;

			}

		),



		TP_printk(

			"error=%ld (%s) fileid=%02x:%02x:%llu fhandle=0x%08x "

			"stateid=%d:0x%08x offset_s=%llu what=%s "

			"offset_r=%llu eof=%u",

			-__entry->error,

			show_nfs4_status(__entry->error),

			MAJOR(__entry->dev), MINOR(__entry->dev),

			(unsigned long long)__entry->fileid,

			__entry->fhandle,

			__entry->stateid_seq, __entry->stateid_hash,

			__entry->offset_s,

			show_llseek_mode(__entry->what),

			__entry->offset_r,

			__entry->eof

		)

);



#endif /* CONFIG_NFS_V4_2 */



#endif /* CONFIG_NFS_V4_1 */