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Date: Thu, 13 Mar 2008 01:12:26 -0400
From: Theodore Ts'o <tytso@....edu>
To: bas@....tetra.nl
Cc: linux-ext4@...r.kernel.org, Theodore Ts'o <tytso@....edu>
Subject: [E2FSPROGS PATCH 3/4] e2fsck: Fix directory i_size handling
If a directory's i_size is bigger than the number of blocks, don't try
to allocate extra empty blocks to the end of the directory; there's no
real point to do that. Also, if a directory's i_size is not a
multiple of the blocksize, flag that as a mistake so it can be fixed.
This more elegantly addresses the problem which was found on Bas van
Schaik's filesystem.
Signed-off-by: "Theodore Ts'o" <tytso@....edu>
---
e2fsck/pass1.c | 25 ++++++++++++++++++++++++-
tests/f_holedir/expect.1 | 13 ++++++++++---
tests/f_holedir/expect.2 | 2 +-
3 files changed, 35 insertions(+), 5 deletions(-)
diff --git a/e2fsck/pass1.c b/e2fsck/pass1.c
index b4db8ef..839f099 100644
--- a/e2fsck/pass1.c
+++ b/e2fsck/pass1.c
@@ -1546,6 +1546,26 @@ static void check_blocks(e2fsck_t ctx, struct problem_context *pctx,
goto out;
}
+ if (pb.is_dir) {
+ while (1) {
+ struct ext2_db_entry *entry;
+
+ if (ext2fs_dblist_get_last(fs->dblist, &entry) ||
+ (entry->ino != ino) ||
+ (entry->blk != 0) ||
+ (entry->blockcnt == 0))
+ break;
+ /* printf("Dropping ino %lu blk %lu blockcnt %d\n",
+ entry->ino, entry->blk, entry->blockcnt); */
+ ext2fs_dblist_drop_last(fs->dblist);
+ if (ext2fs_dblist_get_last(fs->dblist, &entry) ||
+ (entry->ino != ino))
+ pb.last_block--;
+ else
+ pb.last_block = entry->blockcnt;
+ }
+ }
+
if (inode->i_flags & EXT2_INDEX_FL) {
if (handle_htree(ctx, pctx, ino, inode, block_buf)) {
inode->i_flags &= ~EXT2_INDEX_FL;
@@ -1583,7 +1603,9 @@ static void check_blocks(e2fsck_t ctx, struct problem_context *pctx,
#endif
if (pb.is_dir) {
int nblock = inode->i_size >> EXT2_BLOCK_SIZE_BITS(fs->super);
- if (nblock > (pb.last_block + 1))
+ if (inode->i_size & (fs->blocksize - 1))
+ bad_size = 5;
+ else if (nblock > (pb.last_block + 1))
bad_size = 1;
else if (nblock < (pb.last_block + 1)) {
if (((pb.last_block + 1) - nblock) >
@@ -1745,6 +1767,7 @@ static int process_block(ext2_filsys fs,
printf("Missing block (#%d) in directory inode %lu!\n",
blockcnt, p->ino);
#endif
+ p->last_block = blockcnt;
goto mark_dir;
}
return 0;
diff --git a/tests/f_holedir/expect.1 b/tests/f_holedir/expect.1
index 05e0cbb..ad74fa6 100644
--- a/tests/f_holedir/expect.1
+++ b/tests/f_holedir/expect.1
@@ -15,12 +15,19 @@ Directory inode 11 has an unallocated block #3. Allocate? yes
Directory inode 11 has an unallocated block #6. Allocate? yes
-Directory inode 11 has an unallocated block #11. Allocate? yes
-
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
+Block bitmap differences: -21
+Fix? yes
+
+Free blocks count wrong for group #0 (78, counted=79).
+Fix? yes
+
+Free blocks count wrong (78, counted=79).
+Fix? yes
+
test_filesys: ***** FILE SYSTEM WAS MODIFIED *****
-test_filesys: 11/32 files (9.1% non-contiguous), 22/100 blocks
+test_filesys: 11/32 files (9.1% non-contiguous), 21/100 blocks
Exit status is 1
diff --git a/tests/f_holedir/expect.2 b/tests/f_holedir/expect.2
index a821f87..4c0b4f2 100644
--- a/tests/f_holedir/expect.2
+++ b/tests/f_holedir/expect.2
@@ -3,5 +3,5 @@ Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
-test_filesys: 11/32 files (0.0% non-contiguous), 22/100 blocks
+test_filesys: 11/32 files (0.0% non-contiguous), 21/100 blocks
Exit status is 0
--
1.5.4.1.144.gdfee-dirty
--
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