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authorBob Peterson <rpeterso@redhat.com>2011-03-22 10:49:12 -0400
committerSteven Whitehouse <swhiteho@redhat.com>2011-04-20 08:53:12 +0100
commit95c8e17f2f00f6af7474fac0e4050a79db6c3cea (patch)
tree5e4ee14869e6e01625620e56c43c8baeaf7b552c /fs/gfs2
parent2f666bcf757cb72549f360ef6da02f03620a48b6 (diff)
GFS2: Dump better debug info if a bitmap inconsistency is detected
On rare occasions we encounter gfs2 problems where an invalid bitmap state transition is attempted. For example, trying to "unlink" a free block. In these cases, there is really no useful information logged to debug the problem. This patch adds more debug details that should allow us to more closely examine the problem and possibly solve it. Signed-off-by: Bob Peterson <rpeterso@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs/gfs2')
-rw-r--r--fs/gfs2/rgrp.c19
1 files changed, 15 insertions, 4 deletions
diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c
index 6fcae8469f6d..b643c14caff9 100644
--- a/fs/gfs2/rgrp.c
+++ b/fs/gfs2/rgrp.c
@@ -78,10 +78,11 @@ static u32 rgblk_search(struct gfs2_rgrpd *rgd, u32 goal,
static inline void gfs2_setbit(struct gfs2_rgrpd *rgd, unsigned char *buf1,
unsigned char *buf2, unsigned int offset,
- unsigned int buflen, u32 block,
+ struct gfs2_bitmap *bi, u32 block,
unsigned char new_state)
{
unsigned char *byte1, *byte2, *end, cur_state;
+ unsigned int buflen = bi->bi_len;
const unsigned int bit = (block % GFS2_NBBY) * GFS2_BIT_SIZE;
byte1 = buf1 + offset + (block / GFS2_NBBY);
@@ -92,6 +93,16 @@ static inline void gfs2_setbit(struct gfs2_rgrpd *rgd, unsigned char *buf1,
cur_state = (*byte1 >> bit) & GFS2_BIT_MASK;
if (unlikely(!valid_change[new_state * 4 + cur_state])) {
+ printk(KERN_WARNING "GFS2: buf_blk = 0x%llx old_state=%d, "
+ "new_state=%d\n",
+ (unsigned long long)block, cur_state, new_state);
+ printk(KERN_WARNING "GFS2: rgrp=0x%llx bi_start=0x%lx\n",
+ (unsigned long long)rgd->rd_addr,
+ (unsigned long)bi->bi_start);
+ printk(KERN_WARNING "GFS2: bi_offset=0x%lx bi_len=0x%lx\n",
+ (unsigned long)bi->bi_offset,
+ (unsigned long)bi->bi_len);
+ dump_stack();
gfs2_consist_rgrpd(rgd);
return;
}
@@ -1365,7 +1376,7 @@ skip:
gfs2_trans_add_bh(rgd->rd_gl, bi->bi_bh, 1);
gfs2_setbit(rgd, bi->bi_bh->b_data, bi->bi_clone, bi->bi_offset,
- bi->bi_len, blk, new_state);
+ bi, blk, new_state);
goal = blk;
while (*n < elen) {
goal++;
@@ -1375,7 +1386,7 @@ skip:
GFS2_BLKST_FREE)
break;
gfs2_setbit(rgd, bi->bi_bh->b_data, bi->bi_clone, bi->bi_offset,
- bi->bi_len, goal, new_state);
+ bi, goal, new_state);
(*n)++;
}
out:
@@ -1432,7 +1443,7 @@ static struct gfs2_rgrpd *rgblk_free(struct gfs2_sbd *sdp, u64 bstart,
}
gfs2_trans_add_bh(rgd->rd_gl, bi->bi_bh, 1);
gfs2_setbit(rgd, bi->bi_bh->b_data, NULL, bi->bi_offset,
- bi->bi_len, buf_blk, new_state);
+ bi, buf_blk, new_state);
}
return rgd;