for example, 1708 inodes every group,3 block groups, bitmap bytes are 1708/8=213.5 when the inode bitmap has some errors, e2fsprogs cannot fix it
Signed-off-by: GaoMing <[email protected]> --- e2fsck/pass5.c | 9 ++++----- lib/ext2fs/imager.c | 35 +++++++++++++++++++++++++++-------- lib/ext2fs/rw_bitmaps.c | 39 ++++++++++++++++++++++++++++----------- misc/dumpe2fs.c | 4 ++-- 4 files changed, 61 insertions(+), 26 deletions(-) diff --git a/e2fsck/pass5.c b/e2fsck/pass5.c index 7803e8b..4970dae 100644 --- a/e2fsck/pass5.c +++ b/e2fsck/pass5.c @@ -95,7 +95,7 @@ static void check_inode_bitmap_checksum(e2fsck_t ctx) if (ext2fs_test_ib_dirty(ctx->fs)) return; - nbytes = (size_t)(EXT2_INODES_PER_GROUP(ctx->fs->super) / 8); + nbytes = (size_t)((EXT2_INODES_PER_GROUP(ctx->fs->super)+7) / 8); retval = ext2fs_get_mem(ctx->fs->blocksize, &buf); if (retval) { com_err(ctx->program_name, 0, "%s", @@ -108,14 +108,13 @@ static void check_inode_bitmap_checksum(e2fsck_t ctx) if (ext2fs_bg_flags_test(ctx->fs, i, EXT2_BG_INODE_UNINIT)) continue; - ino_itr = 1 + (i * (nbytes << 3)); + ino_itr = 1 + (i * EXT2_INODES_PER_GROUP(ctx->fs->super)); retval = ext2fs_get_inode_bitmap_range2(ctx->fs->inode_map, - ino_itr, nbytes << 3, + ino_itr, EXT2_INODES_PER_GROUP(ctx->fs->super), buf); if (retval) break; - - if (ext2fs_inode_bitmap_csum_verify(ctx->fs, i, buf, nbytes)) + if (ext2fs_inode_bitmap_csum_verify(ctx->fs, i, buf, EXT2_INODES_PER_GROUP(ctx->fs->super) / 8)) continue; pctx.group = i; if (!fix_problem(ctx, PR_5_INODE_BITMAP_CSUM_INVALID, &pctx)) diff --git a/lib/ext2fs/imager.c b/lib/ext2fs/imager.c index 7fd06f7..346ec70 100644 --- a/lib/ext2fs/imager.c +++ b/lib/ext2fs/imager.c @@ -341,7 +341,8 @@ errcode_t ext2fs_image_bitmap_write(ext2_filsys fs, int fd, int flags) bmap = fs->inode_map; itr = 1; cnt = EXT2_INODES_PER_GROUP(fs->super) * fs->group_desc_count; - size = (EXT2_INODES_PER_GROUP(fs->super) / 8); + size = ((EXT2_INODES_PER_GROUP(fs->super)+7) / 8); + total_size = (EXT2_INODES_PER_GROUP(fs->super) * fs->group_desc_count+7)/8; } else { if (!fs->block_map) { retval = ext2fs_read_block_bitmap(fs); @@ -352,13 +353,14 @@ errcode_t ext2fs_image_bitmap_write(ext2_filsys fs, int fd, int flags) itr = fs->super->s_first_data_block; cnt = EXT2_GROUPS_TO_CLUSTERS(fs->super, fs->group_desc_count); size = EXT2_CLUSTERS_PER_GROUP(fs->super) / 8; + total_size = size * fs->group_desc_count; } - total_size = size * fs->group_desc_count; + while (cnt > 0) { size = sizeof(buf); - if (size > (cnt >> 3)) - size = (cnt >> 3); + if (size > ((cnt+7) >> 3)) + size = ((cnt+7) >> 3); retval = ext2fs_get_generic_bmap_range(bmap, itr, size << 3, buf); @@ -372,7 +374,10 @@ errcode_t ext2fs_image_bitmap_write(ext2_filsys fs, int fd, int flags) return EXT2_ET_SHORT_READ; itr += size << 3; - cnt -= size << 3; + if (cnt < (size << 3)) + cnt = 0; + else + cnt -= size << 3; } size = total_size % fs->blocksize; @@ -406,6 +411,7 @@ errcode_t ext2fs_image_bitmap_read(ext2_filsys fs, int fd, int flags) char buf[1024]; unsigned int size; ssize_t actual; + __u64 count, pos; if (flags & IMAGER_FLAG_INODEMAP) { if (!fs->inode_map) { @@ -431,8 +437,8 @@ errcode_t ext2fs_image_bitmap_read(ext2_filsys fs, int fd, int flags) while (cnt > 0) { size = sizeof(buf); - if (size > (cnt >> 3)) - size = (cnt >> 3); + if (size > ((cnt+7) >> 3)) + size = ((cnt+7) >> 3); actual = read(fd, buf, size); if (actual == -1) @@ -440,13 +446,26 @@ errcode_t ext2fs_image_bitmap_read(ext2_filsys fs, int fd, int flags) if (actual != (int) size) return EXT2_ET_SHORT_READ; + if (cnt%8 != 0 && cnt < sizeof(buf)) { + pos = cnt; + count = (((cnt + 7)>>3)<<3)-cnt; + while (count > 0) { + ext2fs_fast_clear_bit(pos, buf); + pos++; + count--; + } + } + retval = ext2fs_set_generic_bmap_range(bmap, itr, size << 3, buf); if (retval) return retval; itr += size << 3; - cnt -= size << 3; + if (cnt < (size << 3)) + cnt = 0; + else + cnt -= size << 3; } return 0; } diff --git a/lib/ext2fs/rw_bitmaps.c b/lib/ext2fs/rw_bitmaps.c index e86bacd..e2499ff 100644 --- a/lib/ext2fs/rw_bitmaps.c +++ b/lib/ext2fs/rw_bitmaps.c @@ -40,6 +40,7 @@ static errcode_t write_bitmaps(ext2_filsys fs, int do_inode, int do_block) blk64_t blk; blk64_t blk_itr = EXT2FS_B2C(fs, fs->super->s_first_data_block); ext2_ino_t ino_itr = 1; + __u64 count, pos; EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS); @@ -115,19 +116,25 @@ static errcode_t write_bitmaps(ext2_filsys fs, int do_inode, int do_block) if (csum_flag && ext2fs_bg_flags_test(fs, i, EXT2_BG_INODE_UNINIT) ) goto skip_this_inode_bitmap; - retval = ext2fs_get_inode_bitmap_range2(fs->inode_map, - ino_itr, inode_nbytes << 3, inode_buf); + ino_itr, EXT2_INODES_PER_GROUP(fs->super), inode_buf); if (retval) goto errout; - retval = ext2fs_inode_bitmap_csum_set(fs, i, inode_buf, - inode_nbytes); + EXT2_INODES_PER_GROUP(fs->super) / 8); if (retval) goto errout; + if (EXT2_INODES_PER_GROUP(fs->super)%8 != 0) { + pos = EXT2_INODES_PER_GROUP(fs->super); + count = (((pos + 7) >> 3)<<3)-pos; + while (count > 0) { + ext2fs_fast_set_bit(pos, inode_buf); + pos++; + count--; + } + } ext2fs_group_desc_csum_set(fs, i); fs->flags |= EXT2_FLAG_DIRTY; - blk = ext2fs_inode_bitmap_loc(fs, i); if (blk) { retval = io_channel_write_blk64(fs->io, blk, 1, @@ -138,7 +145,7 @@ static errcode_t write_bitmaps(ext2_filsys fs, int do_inode, int do_block) } } skip_this_inode_bitmap: - ino_itr += inode_nbytes << 3; + ino_itr += EXT2_INODES_PER_GROUP(fs->super); } if (do_block) { @@ -202,7 +209,7 @@ static errcode_t read_bitmaps(ext2_filsys fs, int do_inode, int do_block) char *buf; errcode_t retval; int block_nbytes = EXT2_CLUSTERS_PER_GROUP(fs->super) / 8; - int inode_nbytes = EXT2_INODES_PER_GROUP(fs->super) / 8; + int inode_nbytes = (EXT2_INODES_PER_GROUP(fs->super) + 7) / 8; int csum_flag; unsigned int cnt; blk64_t blk; @@ -210,6 +217,7 @@ static errcode_t read_bitmaps(ext2_filsys fs, int do_inode, int do_block) blk64_t blk_cnt; ext2_ino_t ino_itr = 1; ext2_ino_t ino_cnt; + __u64 count, pos; EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS); @@ -337,24 +345,33 @@ static errcode_t read_bitmaps(ext2_filsys fs, int do_inode, int do_block) retval = EXT2_ET_INODE_BITMAP_READ; goto cleanup; } - + if (EXT2_INODES_PER_GROUP(fs->super)%8 != 0) { + pos = EXT2_INODES_PER_GROUP(fs->super); + count = (((pos + 7) >> 3)<<3)-pos; + while (count > 0) { + ext2fs_fast_clear_bit(pos, inode_bitmap); + pos++; + count--; + } + } /* verify inode bitmap checksum */ if (!(fs->flags & EXT2_FLAG_IGNORE_CSUM_ERRORS) && !ext2fs_inode_bitmap_csum_verify(fs, i, - inode_bitmap, inode_nbytes)) { + inode_bitmap, + EXT2_INODES_PER_GROUP(fs->super) / 8)) { retval = EXT2_ET_INODE_BITMAP_CSUM_INVALID; goto cleanup; } } else memset(inode_bitmap, 0, inode_nbytes); - cnt = inode_nbytes << 3; + cnt = EXT2_INODES_PER_GROUP(fs->super); retval = ext2fs_set_inode_bitmap_range2(fs->inode_map, ino_itr, cnt, inode_bitmap); if (retval) goto cleanup; - ino_itr += inode_nbytes << 3; + ino_itr += EXT2_INODES_PER_GROUP(fs->super); } } diff --git a/misc/dumpe2fs.c b/misc/dumpe2fs.c index 395ea9e..5cf431a 100644 --- a/misc/dumpe2fs.c +++ b/misc/dumpe2fs.c @@ -168,7 +168,7 @@ static void list_desc(ext2_filsys fs, int grp_only) units = _("clusters"); block_nbytes = EXT2_CLUSTERS_PER_GROUP(fs->super) / 8; - inode_nbytes = EXT2_INODES_PER_GROUP(fs->super) / 8; + inode_nbytes = (EXT2_INODES_PER_GROUP(fs->super)+7) / 8; if (fs->block_map) block_bitmap = malloc(block_nbytes); @@ -303,7 +303,7 @@ static void list_desc(ext2_filsys fs, int grp_only) if (inode_bitmap) { fputs(_(" Free inodes: "), stdout); retval = ext2fs_get_inode_bitmap_range2(fs->inode_map, - ino_itr, inode_nbytes << 3, inode_bitmap); + ino_itr, EXT2_INODES_PER_GROUP(fs->super), inode_bitmap); if (retval) com_err("list_desc", retval, "while reading inode bitmap"); -- 2.8.1
