xfs: event tracing support

Convert the old xfs tracing support that could only be used with the
out of tree kdb and xfsidbg patches to use the generic event tracer.

To use it make sure CONFIG_EVENT_TRACING is enabled and then enable
all xfs trace channels by:

   echo 1 > /sys/kernel/debug/tracing/events/xfs/enable

or alternatively enable single events by just doing the same in one
event subdirectory, e.g.

   echo 1 > /sys/kernel/debug/tracing/events/xfs/xfs_ihold/enable

or set more complex filters, etc. In Documentation/trace/events.txt
all this is desctribed in more detail.  To reads the events do a

   cat /sys/kernel/debug/tracing/trace

Compared to the last posting this patch converts the tracing mostly to
the one tracepoint per callsite model that other users of the new
tracing facility also employ.  This allows a very fine-grained control
of the tracing, a cleaner output of the traces and also enables the
perf tool to use each tracepoint as a virtual performance counter,
     allowing us to e.g. count how often certain workloads git various
     spots in XFS.  Take a look at

    http://lwn.net/Articles/346470/

for some examples.

Also the btree tracing isn't included at all yet, as it will require
additional core tracing features not in mainline yet, I plan to
deliver it later.

And the really nice thing about this patch is that it actually removes
many lines of code while adding this nice functionality:

 fs/xfs/Makefile                |    8
 fs/xfs/linux-2.6/xfs_acl.c     |    1
 fs/xfs/linux-2.6/xfs_aops.c    |   52 -
 fs/xfs/linux-2.6/xfs_aops.h    |    2
 fs/xfs/linux-2.6/xfs_buf.c     |  117 +--
 fs/xfs/linux-2.6/xfs_buf.h     |   33
 fs/xfs/linux-2.6/xfs_fs_subr.c |    3
 fs/xfs/linux-2.6/xfs_ioctl.c   |    1
 fs/xfs/linux-2.6/xfs_ioctl32.c |    1
 fs/xfs/linux-2.6/xfs_iops.c    |    1
 fs/xfs/linux-2.6/xfs_linux.h   |    1
 fs/xfs/linux-2.6/xfs_lrw.c     |   87 --
 fs/xfs/linux-2.6/xfs_lrw.h     |   45 -
 fs/xfs/linux-2.6/xfs_super.c   |  104 ---
 fs/xfs/linux-2.6/xfs_super.h   |    7
 fs/xfs/linux-2.6/xfs_sync.c    |    1
 fs/xfs/linux-2.6/xfs_trace.c   |   75 ++
 fs/xfs/linux-2.6/xfs_trace.h   | 1369 +++++++++++++++++++++++++++++++++++++++++
 fs/xfs/linux-2.6/xfs_vnode.h   |    4
 fs/xfs/quota/xfs_dquot.c       |  110 ---
 fs/xfs/quota/xfs_dquot.h       |   21
 fs/xfs/quota/xfs_qm.c          |   40 -
 fs/xfs/quota/xfs_qm_syscalls.c |    4
 fs/xfs/support/ktrace.c        |  323 ---------
 fs/xfs/support/ktrace.h        |   85 --
 fs/xfs/xfs.h                   |   16
 fs/xfs/xfs_ag.h                |   14
 fs/xfs/xfs_alloc.c             |  230 +-----
 fs/xfs/xfs_alloc.h             |   27
 fs/xfs/xfs_alloc_btree.c       |    1
 fs/xfs/xfs_attr.c              |  107 ---
 fs/xfs/xfs_attr.h              |   10
 fs/xfs/xfs_attr_leaf.c         |   14
 fs/xfs/xfs_attr_sf.h           |   40 -
 fs/xfs/xfs_bmap.c              |  507 +++------------
 fs/xfs/xfs_bmap.h              |   49 -
 fs/xfs/xfs_bmap_btree.c        |    6
 fs/xfs/xfs_btree.c             |    5
 fs/xfs/xfs_btree_trace.h       |   17
 fs/xfs/xfs_buf_item.c          |   87 --
 fs/xfs/xfs_buf_item.h          |   20
 fs/xfs/xfs_da_btree.c          |    3
 fs/xfs/xfs_da_btree.h          |    7
 fs/xfs/xfs_dfrag.c             |    2
 fs/xfs/xfs_dir2.c              |    8
 fs/xfs/xfs_dir2_block.c        |   20
 fs/xfs/xfs_dir2_leaf.c         |   21
 fs/xfs/xfs_dir2_node.c         |   27
 fs/xfs/xfs_dir2_sf.c           |   26
 fs/xfs/xfs_dir2_trace.c        |  216 ------
 fs/xfs/xfs_dir2_trace.h        |   72 --
 fs/xfs/xfs_filestream.c        |    8
 fs/xfs/xfs_fsops.c             |    2
 fs/xfs/xfs_iget.c              |  111 ---
 fs/xfs/xfs_inode.c             |   67 --
 fs/xfs/xfs_inode.h             |   76 --
 fs/xfs/xfs_inode_item.c        |    5
 fs/xfs/xfs_iomap.c             |   85 --
 fs/xfs/xfs_iomap.h             |    8
 fs/xfs/xfs_log.c               |  181 +----
 fs/xfs/xfs_log_priv.h          |   20
 fs/xfs/xfs_log_recover.c       |    1
 fs/xfs/xfs_mount.c             |    2
 fs/xfs/xfs_quota.h             |    8
 fs/xfs/xfs_rename.c            |    1
 fs/xfs/xfs_rtalloc.c           |    1
 fs/xfs/xfs_rw.c                |    3
 fs/xfs/xfs_trans.h             |   47 +
 fs/xfs/xfs_trans_buf.c         |   62 -
 fs/xfs/xfs_vnodeops.c          |    8
 70 files changed, 2151 insertions(+), 2592 deletions(-)

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Alex Elder <aelder@sgi.com>

1 files changed, 0 insertions, 216 deletions

diff --git a/fs/xfs/xfs_dir2_trace.c b/fs/xfs/xfs_dir2_trace.c
deleted file mode 100644
index 6cc7c0c681ac..000000000000
--- a/fs/xfs/xfs_dir2_trace.c
+++ /dev/null
@@ -1,216 +0,0 @@
-/*
- * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
- * All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it would be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write the Free Software Foundation,
- * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- */
-#include "xfs.h"
-#include "xfs_fs.h"
-#include "xfs_types.h"
-#include "xfs_inum.h"
-#include "xfs_dir2.h"
-#include "xfs_da_btree.h"
-#include "xfs_bmap_btree.h"
-#include "xfs_dir2_sf.h"
-#include "xfs_attr_sf.h"
-#include "xfs_dinode.h"
-#include "xfs_inode.h"
-#include "xfs_dir2_trace.h"
-
-#ifdef XFS_DIR2_TRACE
-ktrace_t	*xfs_dir2_trace_buf;
-
-/*
- * Enter something in the trace buffers.
- */
-static void
-xfs_dir2_trace_enter(
-	xfs_inode_t	*dp,
-	int		type,
-	char		*where,
-	char		*name,
-	int		namelen,
-	void		*a0,
-	void		*a1,
-	void		*a2,
-	void		*a3,
-	void		*a4,
-	void		*a5,
-	void		*a6,
-	void		*a7)
-{
-	void		*n[5];
-
-	ASSERT(xfs_dir2_trace_buf);
-	ASSERT(dp->i_dir_trace);
-	if (name)
-		memcpy(n, name, min((int)sizeof(n), namelen));
-	else
-		memset((char *)n, 0, sizeof(n));
-	ktrace_enter(xfs_dir2_trace_buf,
-		(void *)(long)type, (void *)where,
-		(void *)a0, (void *)a1, (void *)a2, (void *)a3,
-		(void *)a4, (void *)a5, (void *)a6, (void *)a7,
-		(void *)(long)namelen,
-		(void *)n[0], (void *)n[1], (void *)n[2],
-		(void *)n[3], (void *)n[4]);
-	ktrace_enter(dp->i_dir_trace,
-		(void *)(long)type, (void *)where,
-		(void *)a0, (void *)a1, (void *)a2, (void *)a3,
-		(void *)a4, (void *)a5, (void *)a6, (void *)a7,
-		(void *)(long)namelen,
-		(void *)n[0], (void *)n[1], (void *)n[2],
-		(void *)n[3], (void *)n[4]);
-}
-
-void
-xfs_dir2_trace_args(
-	char		*where,
-	xfs_da_args_t	*args)
-{
-	xfs_dir2_trace_enter(args->dp, XFS_DIR2_KTRACE_ARGS, where,
-		(char *)args->name, (int)args->namelen,
-		(void *)(unsigned long)args->hashval,
-		(void *)((unsigned long)(args->inumber >> 32)),
-		(void *)((unsigned long)(args->inumber & 0xFFFFFFFF)),
-		(void *)args->dp, (void *)args->trans,
-		(void *)(unsigned long)(args->op_flags & XFS_DA_OP_JUSTCHECK),
-		NULL, NULL);
-}
-
-void
-xfs_dir2_trace_args_b(
-	char		*where,
-	xfs_da_args_t	*args,
-	xfs_dabuf_t	*bp)
-{
-	xfs_dir2_trace_enter(args->dp, XFS_DIR2_KTRACE_ARGS_B, where,
-		(char *)args->name, (int)args->namelen,
-		(void *)(unsigned long)args->hashval,
-		(void *)((unsigned long)(args->inumber >> 32)),
-		(void *)((unsigned long)(args->inumber & 0xFFFFFFFF)),
-		(void *)args->dp, (void *)args->trans,
-		(void *)(unsigned long)(args->op_flags & XFS_DA_OP_JUSTCHECK),
-		(void *)(bp ? bp->bps[0] : NULL), NULL);
-}
-
-void
-xfs_dir2_trace_args_bb(
-	char		*where,
-	xfs_da_args_t	*args,
-	xfs_dabuf_t	*lbp,
-	xfs_dabuf_t	*dbp)
-{
-	xfs_dir2_trace_enter(args->dp, XFS_DIR2_KTRACE_ARGS_BB, where,
-		(char *)args->name, (int)args->namelen,
-		(void *)(unsigned long)args->hashval,
-		(void *)((unsigned long)(args->inumber >> 32)),
-		(void *)((unsigned long)(args->inumber & 0xFFFFFFFF)),
-		(void *)args->dp, (void *)args->trans,
-		(void *)(unsigned long)(args->op_flags & XFS_DA_OP_JUSTCHECK),
-		(void *)(lbp ? lbp->bps[0] : NULL),
-		(void *)(dbp ? dbp->bps[0] : NULL));
-}
-
-void
-xfs_dir2_trace_args_bibii(
-	char		*where,
-	xfs_da_args_t	*args,
-	xfs_dabuf_t	*bs,
-	int		ss,
-	xfs_dabuf_t	*bd,
-	int		sd,
-	int		c)
-{
-	xfs_buf_t	*bpbs = bs ? bs->bps[0] : NULL;
-	xfs_buf_t	*bpbd = bd ? bd->bps[0] : NULL;
-
-	xfs_dir2_trace_enter(args->dp, XFS_DIR2_KTRACE_ARGS_BIBII, where,
-		(char *)args->name, (int)args->namelen,
-		(void *)args->dp, (void *)args->trans,
-		(void *)bpbs, (void *)(long)ss, (void *)bpbd, (void *)(long)sd,
-		(void *)(long)c, NULL);
-}
-
-void
-xfs_dir2_trace_args_db(
-	char		*where,
-	xfs_da_args_t	*args,
-	xfs_dir2_db_t	db,
-	xfs_dabuf_t	*bp)
-{
-	xfs_buf_t	*dbp = bp ? bp->bps[0] : NULL;
-
-	xfs_dir2_trace_enter(args->dp, XFS_DIR2_KTRACE_ARGS_DB, where,
-		(char *)args->name, (int)args->namelen,
-		(void *)(unsigned long)args->hashval,
-		(void *)((unsigned long)(args->inumber >> 32)),
-		(void *)((unsigned long)(args->inumber & 0xFFFFFFFF)),
-		(void *)args->dp, (void *)args->trans,
-		(void *)(unsigned long)(args->op_flags & XFS_DA_OP_JUSTCHECK),
-		(void *)(long)db, (void *)dbp);
-}
-
-void
-xfs_dir2_trace_args_i(
-	char		*where,
-	xfs_da_args_t	*args,
-	xfs_ino_t	i)
-{
-	xfs_dir2_trace_enter(args->dp, XFS_DIR2_KTRACE_ARGS_I, where,
-		(char *)args->name, (int)args->namelen,
-		(void *)(unsigned long)args->hashval,
-		(void *)((unsigned long)(args->inumber >> 32)),
-		(void *)((unsigned long)(args->inumber & 0xFFFFFFFF)),
-		(void *)args->dp, (void *)args->trans,
-		(void *)(unsigned long)(args->op_flags & XFS_DA_OP_JUSTCHECK),
-		(void *)((unsigned long)(i >> 32)),
-		(void *)((unsigned long)(i & 0xFFFFFFFF)));
-}
-
-void
-xfs_dir2_trace_args_s(
-	char		*where,
-	xfs_da_args_t	*args,
-	int		s)
-{
-	xfs_dir2_trace_enter(args->dp, XFS_DIR2_KTRACE_ARGS_S, where,
-		(char *)args->name, (int)args->namelen,
-		(void *)(unsigned long)args->hashval,
-		(void *)((unsigned long)(args->inumber >> 32)),
-		(void *)((unsigned long)(args->inumber & 0xFFFFFFFF)),
-		(void *)args->dp, (void *)args->trans,
-		(void *)(unsigned long)(args->op_flags & XFS_DA_OP_JUSTCHECK),
-		(void *)(long)s, NULL);
-}
-
-void
-xfs_dir2_trace_args_sb(
-	char		*where,
-	xfs_da_args_t	*args,
-	int		s,
-	xfs_dabuf_t	*bp)
-{
-	xfs_buf_t	*dbp = bp ? bp->bps[0] : NULL;
-
-	xfs_dir2_trace_enter(args->dp, XFS_DIR2_KTRACE_ARGS_SB, where,
-		(char *)args->name, (int)args->namelen,
-		(void *)(unsigned long)args->hashval,
-		(void *)((unsigned long)(args->inumber >> 32)),
-		(void *)((unsigned long)(args->inumber & 0xFFFFFFFF)),
-		(void *)args->dp, (void *)args->trans,
-		(void *)(unsigned long)(args->op_flags & XFS_DA_OP_JUSTCHECK),
-		(void *)(long)s, (void *)dbp);
-}
-#endif	/* XFS_DIR2_TRACE */