[Ocfs2-tools-devel] [PATCH 5/6] Add EXTENT_OVERLAP and EXTENT_HOLE
Goldwyn Rodrigues
rgoldwyn at gmail.com
Mon Aug 22 15:36:23 PDT 2011
EXTENT_OVERLAP creates a file with extents overlapped, so that there
could be multiple extents for a given extent.
EXTENT_HOLE creates a file with a hole. This is not a corruption.
I added it to check that DIR_HOLE does not correct files with holes.
This can also be used to check sparse files in nosparse filesystem
option.
Signed-off-by: Goldwyn Rodrigues <rgoldwyn at suse.de>
---
fswreck/corrupt.c | 6 ++++++
fswreck/extent.c | 26 ++++++++++++++++++++++++++
fswreck/include/fsck_type.h | 2 ++
fswreck/main.c | 4 ++++
4 files changed, 38 insertions(+), 0 deletions(-)
diff --git a/fswreck/corrupt.c b/fswreck/corrupt.c
index 161b078..c0c57f1 100644
--- a/fswreck/corrupt.c
+++ b/fswreck/corrupt.c
@@ -85,6 +85,12 @@ void corrupt_file(ocfs2_filesys *fs, enum fsck_type
type, uint16_t slotnum)
case EXTENT_BLKNO_RANGE:
func = mess_up_extent_record;
break;
+ case EXTENT_OVERLAP:
+ func = mess_up_extent_record;
+ break;
+ case EXTENT_HOLE:
+ func = mess_up_extent_record;
+ break;
case EXTENT_LIST_DEPTH:
func = mess_up_extent_list;
break;
diff --git a/fswreck/extent.c b/fswreck/extent.c
index f6fade0..bf3c1b1 100644
--- a/fswreck/extent.c
+++ b/fswreck/extent.c
@@ -364,6 +364,32 @@ static void mess_up_record(ocfs2_filesys *fs,
uint64_t blkno,
" from %"PRIu64 " to %"PRIu64"\n",
blkno, oldno, er->e_blkno);
break;
+ case EXTENT_OVERLAP:
+ ret = ocfs2_extend_allocation(fs, blkno, 2);
+ if (ret)
+ FSWRK_COM_FATAL(progname, ret);
+ ret = ocfs2_read_inode(fs, blkno, buf);
+ if (ret)
+ FSWRK_COM_FATAL(progname, ret);
+ er = &(el->l_recs[1]);
+ er->e_cpos -= 1;
+ fprintf(stdout, "EXTENT_OVERLAP: "
+ "Corrupt inode#%"PRIu64", change cpos "
+ " to overlap\n", blkno);
+ break;
+ case EXTENT_HOLE:
+ ret = ocfs2_extend_allocation(fs, blkno, 2);
+ if (ret)
+ FSWRK_COM_FATAL(progname, ret);
+ ret = ocfs2_read_inode(fs, blkno, buf);
+ if (ret)
+ FSWRK_COM_FATAL(progname, ret);
+ er = &(el->l_recs[1]);
+ er->e_cpos += 11;
+ fprintf(stdout, "EXTENT_HOLE: "
+ "Corrupt inode#%"PRIu64", change cpos "
+ " to increase hole\n", blkno);
+ break;
default:
goto bail;
}
diff --git a/fswreck/include/fsck_type.h b/fswreck/include/fsck_type.h
index c18a134..0466db8 100644
--- a/fswreck/include/fsck_type.h
+++ b/fswreck/include/fsck_type.h
@@ -45,6 +45,8 @@ enum fsck_type
EXTENT_LIST_COUNT,
EXTENT_LIST_FREE,
EXTENT_BLKNO_RANGE,
+ EXTENT_OVERLAP,
+ EXTENT_HOLE,
CHAIN_CPG,
SUPERBLOCK_CLUSTERS_EXCESS,
SUPERBLOCK_CLUSTERS_LACK,
diff --git a/fswreck/main.c b/fswreck/main.c
index 14b0301..3bb886d 100644
--- a/fswreck/main.c
+++ b/fswreck/main.c
@@ -71,6 +71,10 @@ static struct prompt_code prompt_codes[NUM_FSCK_TYPE] = {
"Corrupt extent record's e_leaf_clusters"),
define_prompt_code(EXTENT_BLKNO_RANGE, corrupt_file,
"Corrupt extent record's e_blkno to 1"),
+ define_prompt_code(EXTENT_OVERLAP, corrupt_file,
+ "Corrupt extent record's e_cpos to overlap"),
+ define_prompt_code(EXTENT_HOLE, corrupt_file,
+ "Corrupt extent record's e_cpos to create hole"),
define_prompt_code(EXTENT_LIST_DEPTH, corrupt_file,
"Corrupt first extent block's list depth of an inode"),
define_prompt_code(EXTENT_LIST_COUNT, corrupt_file,
--
1.7.6
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