Rewrite the block bitmap when the checksum doesn't match. This is ok since
e2fsck will have already computed the correct inode bitmap.
Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
---
e2fsck/pass5.c | 61 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
e2fsck/problem.c | 5 ++++
e2fsck/problem.h | 3 +++
3 files changed, 69 insertions(+), 0 deletions(-)
diff --git a/e2fsck/pass5.c b/e2fsck/pass5.c
index f9d746c..a0cc564 100644
--- a/e2fsck/pass5.c
+++ b/e2fsck/pass5.c
@@ -26,6 +26,7 @@ static void check_block_bitmaps(e2fsck_t ctx);
static void check_inode_bitmaps(e2fsck_t ctx);
static void check_inode_end(e2fsck_t ctx);
static void check_block_end(e2fsck_t ctx);
+static void check_inode_bitmap_checksum(e2fsck_t ctx);
void e2fsck_pass5(e2fsck_t ctx)
{
@@ -48,7 +49,9 @@ void e2fsck_pass5(e2fsck_t ctx)
if ((ctx->progress)(ctx, 5, 0, ctx->fs->group_desc_count*2))
return;
+ ctx->fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
e2fsck_read_bitmaps(ctx);
+ ctx->fs->flags &= ~EXT2_FLAG_IGNORE_CSUM_ERRORS;
check_block_bitmaps(ctx);
if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
@@ -63,6 +66,8 @@ void e2fsck_pass5(e2fsck_t ctx)
if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
return;
+ check_inode_bitmap_checksum(ctx);
+
ext2fs_free_inode_bitmap(ctx->inode_used_map);
ctx->inode_used_map = 0;
ext2fs_free_inode_bitmap(ctx->inode_dir_map);
@@ -73,6 +78,62 @@ void e2fsck_pass5(e2fsck_t ctx)
print_resource_track(ctx, _("Pass 5"), &rtrack, ctx->fs->io);
}
+static void check_inode_bitmap_checksum(e2fsck_t ctx)
+{
+ struct problem_context pctx;
+ struct ext4_group_desc *gdp;
+ char *buf;
+ dgrp_t i;
+ int nbytes;
+ ext2_ino_t ino_itr;
+ errcode_t retval;
+ int csum_flag = 0;
+
+ /* If bitmap is dirty from being fixed, checksum will be corrected */
+ if (ext2fs_test_ib_dirty(ctx->fs))
+ return;
+
+ nbytes = (size_t)((EXT2_INODES_PER_GROUP(ctx->fs->super) + 7) / 8);
+ retval = ext2fs_get_memalign(ctx->fs->blocksize, ctx->fs->blocksize,
+ &buf);
+ if (retval)
+ return;
+
+ if (EXT2_HAS_RO_COMPAT_FEATURE(ctx->fs->super,
+ EXT4_FEATURE_RO_COMPAT_GDT_CSUM))
+ csum_flag = 1;
+
+ clear_problem_context(&pctx);
+ for (i = 0; i < ctx->fs->group_desc_count; i++) {
+ if (csum_flag && ext2fs_bg_flags_test(ctx->fs, i,
+ EXT2_BG_INODE_UNINIT))
+ continue;
+
+ ino_itr = 1 + (i * (nbytes << 3));
+ gdp = (struct ext4_group_desc *)ext2fs_group_desc(ctx->fs,
+ ctx->fs->group_desc, i);
+ retval = ext2fs_get_inode_bitmap_range2(ctx->fs->inode_map,
+ ino_itr, nbytes << 3,
+ buf);
+ if (retval)
+ break;
+
+ if (ext2fs_bitmap_csum_verify(ctx->fs, i,
+ gdp->bg_inode_bitmap_csum,
+ buf, nbytes))
+ continue;
+ pctx.group = i;
+ if (!fix_problem(ctx, PR_5_INODE_BITMAP_CSUM_INVALID, &pctx))
+ continue;
+
+ /* Fixing one checksum will rewrite all of them */
+ ext2fs_mark_ib_dirty(ctx->fs);
+ break;
+ }
+
+ ext2fs_free_mem(&buf);
+}
+
static void e2fsck_discard_blocks(e2fsck_t ctx, io_manager manager,
blk64_t start, blk64_t count)
{
diff --git a/e2fsck/problem.c b/e2fsck/problem.c
index b5176d4..35a8055 100644
--- a/e2fsck/problem.c
+++ b/e2fsck/problem.c
@@ -1659,6 +1659,11 @@ static struct e2fsck_problem problem_table[] = {
N_("@g %g @i(s) in use but @g is marked INODE_UNINIT\n"),
PROMPT_FIX, PR_PREEN_OK },
+ /* Group N inode bitmap does not match checksum */
+ { PR_5_INODE_BITMAP_CSUM_INVALID,
+ N_("@g %g @i bitmap does not match checksum\n"),
+ PROMPT_FIX, PR_LATCH_IBITMAP | PR_PREEN_OK },
+
/* Post-Pass 5 errors */
/* Recreate journal if E2F_FLAG_JOURNAL_INODE flag is set */
diff --git a/e2fsck/problem.h b/e2fsck/problem.h
index 4e353b7..9766113 100644
--- a/e2fsck/problem.h
+++ b/e2fsck/problem.h
@@ -1001,6 +1001,9 @@ struct problem_context {
/* Inode in use but group is marked INODE_UNINIT */
#define PR_5_INODE_UNINIT 0x050019
+/* Inode bitmap checksum does not match */
+#define PR_5_INODE_BITMAP_CSUM_INVALID 0x05001A
+
/*
* Post-Pass 5 errors
*/
--
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