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nilfs2: implement segments subsystem debugging output

PATCH New Vyacheslav Dubeyko 1 participant 1 message Jun 17, 2013

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Vyacheslav Dubeyko

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PATCH 7/24 nilfs2: implement segments subsystem debugging output

From: Vyacheslav Dubeyko <[email protected]>
Subject: [PATCH 07/24] nilfs2: implement segments subsystem debugging output

This patch adds debugging output by means of nilfs2_debug() method into modules that are grouped by segments subsystem debugging output option (CONFIG_NILFS2_DEBUG_SEGMENTS_SUBSYSTEM).

Signed-off-by Vyacheslav Dubeyko <[email protected]>
CC Ryusuke Konishi <[email protected]>
---
 fs/nilfs2/segbuf.c  |   30 +++++++
 fs/nilfs2/segment.c |  247 ++++++++++++++++++++++++++++++++++++++++++++++++++-
 2 files changed, 274 insertions(+), 3 deletions(-)
fs/nilfs2/segbuf.c +30 -0
index dc9a913..6ee75b1 100644
@@ -73,6 +73,10 @@ void nilfs_segbuf_free(struct nilfs_segment_buffer *segbuf)
 void nilfs_segbuf_map(struct nilfs_segment_buffer *segbuf, __u64 segnum,
 		     unsigned long offset, struct the_nilfs *nilfs)
 {
+	nilfs2_debug(DBG_SEGBUF,
+			"segbuf %p, segnum %llu, offset %lu, nilfs %p\n",
+			segbuf, segnum, offset, nilfs);
+
 	segbuf->sb_segnum = segnum;
 	nilfs_get_segment_range(nilfs, segnum, &segbuf->sb_fseg_start,
 				&segbuf->sb_fseg_end);

@@ -90,6 +94,10 @@ void nilfs_segbuf_map(struct nilfs_segment_buffer *segbuf, __u64 segnum,
 void nilfs_segbuf_map_cont(struct nilfs_segment_buffer *segbuf,
 			   struct nilfs_segment_buffer *prev)
 {
+	nilfs2_debug(DBG_SEGBUF,
+			"prev->sb_segnum %llu, prev->sb_pseg_start %lu\n",
+			prev->sb_segnum, prev->sb_pseg_start);
+
 	segbuf->sb_segnum = prev->sb_segnum;
 	segbuf->sb_fseg_start = prev->sb_fseg_start;
 	segbuf->sb_fseg_end = prev->sb_fseg_end;

@@ -109,6 +117,10 @@ int nilfs_segbuf_extend_segsum(struct nilfs_segment_buffer *segbuf)
 {
 	struct buffer_head *bh;
 
+	nilfs2_debug(DBG_SEGBUF,
+			"sb_segnum %llu, sb_pseg_start %lu\n",
+			segbuf->sb_segnum, segbuf->sb_pseg_start);
+
 	bh = sb_getblk(segbuf->sb_super,
 		       segbuf->sb_pseg_start + segbuf->sb_sum.nsumblk);
 	if (unlikely(!bh))

@@ -123,6 +135,10 @@ int nilfs_segbuf_extend_payload(struct nilfs_segment_buffer *segbuf,
 {
 	struct buffer_head *bh;
 
+	nilfs2_debug(DBG_SEGBUF,
+			"sb_segnum %llu, sb_pseg_start %lu, bhp %p\n",
+			segbuf->sb_segnum, segbuf->sb_pseg_start, bhp);
+
 	bh = sb_getblk(segbuf->sb_super,
 		       segbuf->sb_pseg_start + segbuf->sb_sum.nblocks);
 	if (unlikely(!bh))

@@ -138,6 +154,12 @@ int nilfs_segbuf_reset(struct nilfs_segment_buffer *segbuf, unsigned flags,
 {
 	int err;
 
+	nilfs2_debug(DBG_SEGBUF,
+			"sb_segnum %llu, sb_pseg_start %lu, "
+			"flags %#x, ctime %lu, cno %llu\n",
+			segbuf->sb_segnum, segbuf->sb_pseg_start,
+			flags, ctime, cno);
+
 	segbuf->sb_sum.nblocks = segbuf->sb_sum.nsumblk = 0;
 	err = nilfs_segbuf_extend_segsum(segbuf);
 	if (unlikely(err))

@@ -159,6 +181,10 @@ void nilfs_segbuf_fill_in_segsum(struct nilfs_segment_buffer *segbuf)
 	struct nilfs_segment_summary *raw_sum;
 	struct buffer_head *bh_sum;
 
+	nilfs2_debug(DBG_SEGBUF,
+			"sb_segnum %llu, sb_pseg_start %lu\n",
+			segbuf->sb_segnum, segbuf->sb_pseg_start);
+
 	bh_sum = list_entry(segbuf->sb_segsum_buffers.next,
 			    struct buffer_head, b_assoc_buffers);
 	raw_sum = (struct nilfs_segment_summary *)bh_sum->b_data;

@@ -263,6 +289,10 @@ static void nilfs_release_buffers(struct list_head *list)
 
 static void nilfs_segbuf_clear(struct nilfs_segment_buffer *segbuf)
 {
+	nilfs2_debug(DBG_SEGBUF,
+			"sb_segnum %llu, sb_pseg_start %lu\n",
+			segbuf->sb_segnum, segbuf->sb_pseg_start);
+
 	nilfs_release_buffers(&segbuf->sb_segsum_buffers);
 	nilfs_release_buffers(&segbuf->sb_payload_buffers);
 	segbuf->sb_super_root = NULL;
fs/nilfs2/segment.c +244 -3

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