diff options
| -rw-r--r-- | fs/reiserfs/bitmap.c | 40 | ||||
| -rw-r--r-- | fs/reiserfs/super.c | 2 | ||||
| -rw-r--r-- | include/linux/reiserfs_fs_sb.h | 1 |
3 files changed, 28 insertions, 15 deletions
diff --git a/fs/reiserfs/bitmap.c b/fs/reiserfs/bitmap.c index 4a7dbdee1b6..1022347a211 100644 --- a/fs/reiserfs/bitmap.c +++ b/fs/reiserfs/bitmap.c @@ -50,16 +50,15 @@ static inline void get_bit_address(struct super_block *s, { /* It is in the bitmap block number equal to the block * number divided by the number of bits in a block. */ - *bmap_nr = block / (s->s_blocksize << 3); + *bmap_nr = block >> (s->s_blocksize_bits + 3); /* Within that bitmap block it is located at bit offset *offset. */ *offset = block & ((s->s_blocksize << 3) - 1); - return; } #ifdef CONFIG_REISERFS_CHECK int is_reusable(struct super_block *s, b_blocknr_t block, int bit_value) { - int i, j; + int bmap, offset; if (block == 0 || block >= SB_BLOCK_COUNT(s)) { reiserfs_warning(s, @@ -68,34 +67,45 @@ int is_reusable(struct super_block *s, b_blocknr_t block, int bit_value) return 0; } - /* it can't be one of the bitmap blocks */ - for (i = 0; i < SB_BMAP_NR(s); i++) - if (block == SB_AP_BITMAP(s)[i].bh->b_blocknr) { + get_bit_address(s, block, &bmap, &offset); + + /* Old format filesystem? Unlikely, but the bitmaps are all up front so + * we need to account for it. */ + if (unlikely(test_bit(REISERFS_OLD_FORMAT, + &(REISERFS_SB(s)->s_properties)))) { + b_blocknr_t bmap1 = REISERFS_SB(s)->s_sbh->b_blocknr + 1; + if (block >= bmap1 && block <= bmap1 + SB_BMAP_NR(s)) { + reiserfs_warning(s, "vs: 4019: is_reusable: " + "bitmap block %lu(%u) can't be freed or reused", + block, SB_BMAP_NR(s)); + return 0; + } + } else { + if (offset == 0) { reiserfs_warning(s, "vs: 4020: is_reusable: " "bitmap block %lu(%u) can't be freed or reused", block, SB_BMAP_NR(s)); return 0; } + } - get_bit_address(s, block, &i, &j); - - if (i >= SB_BMAP_NR(s)) { + if (bmap >= SB_BMAP_NR(s)) { reiserfs_warning(s, "vs-4030: is_reusable: there is no so many bitmap blocks: " - "block=%lu, bitmap_nr=%d", block, i); + "block=%lu, bitmap_nr=%d", block, bmap); return 0; } if ((bit_value == 0 && - reiserfs_test_le_bit(j, SB_AP_BITMAP(s)[i].bh->b_data)) || + reiserfs_test_le_bit(offset, SB_AP_BITMAP(s)[bmap].bh->b_data)) || (bit_value == 1 && - reiserfs_test_le_bit(j, SB_AP_BITMAP(s)[i].bh->b_data) == 0)) { + reiserfs_test_le_bit(offset, SB_AP_BITMAP(s)[bmap].bh->b_data) == 0)) { reiserfs_warning(s, "vs-4040: is_reusable: corresponding bit of block %lu does not " - "match required value (i==%d, j==%d) test_bit==%d", - block, i, j, reiserfs_test_le_bit(j, + "match required value (bmap==%d, offset==%d) test_bit==%d", + block, bmap, offset, reiserfs_test_le_bit(offset, SB_AP_BITMAP - (s)[i].bh-> + (s)[bmap].bh-> b_data)); return 0; diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c index 80fc3b32802..db2c581df76 100644 --- a/fs/reiserfs/super.c +++ b/fs/reiserfs/super.c @@ -1818,6 +1818,8 @@ static int reiserfs_fill_super(struct super_block *s, void *data, int silent) if (is_reiserfs_3_5(rs) || (is_reiserfs_jr(rs) && SB_VERSION(s) == REISERFS_VERSION_1)) set_bit(REISERFS_3_5, &(sbi->s_properties)); + else if (old_format) + set_bit(REISERFS_OLD_FORMAT, &(sbi->s_properties)); else set_bit(REISERFS_3_6, &(sbi->s_properties)); diff --git a/include/linux/reiserfs_fs_sb.h b/include/linux/reiserfs_fs_sb.h index 31b4c0bd4fa..4f21ad388c7 100644 --- a/include/linux/reiserfs_fs_sb.h +++ b/include/linux/reiserfs_fs_sb.h @@ -414,6 +414,7 @@ struct reiserfs_sb_info { /* Definitions of reiserfs on-disk properties: */ #define REISERFS_3_5 0 #define REISERFS_3_6 1 +#define REISERFS_OLD_FORMAT 2 enum reiserfs_mount_options { /* Mount options */ |