diff options
Diffstat (limited to 'fs/ext4/super.c')
| -rw-r--r-- | fs/ext4/super.c | 46 |
1 files changed, 29 insertions, 17 deletions
diff --git a/fs/ext4/super.c b/fs/ext4/super.c index bc8848bff2f..811011fc5c9 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -63,40 +63,52 @@ static void ext4_write_super (struct super_block * sb); static void ext4_write_super_lockfs(struct super_block *sb); -ext4_fsblk_t ext4_block_bitmap(struct ext4_group_desc *bg) +ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, + struct ext4_group_desc *bg) { return le32_to_cpu(bg->bg_block_bitmap) | - ((ext4_fsblk_t)le16_to_cpu(bg->bg_block_bitmap_hi) << 32); + (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? + (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); } -ext4_fsblk_t ext4_inode_bitmap(struct ext4_group_desc *bg) +ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, + struct ext4_group_desc *bg) { return le32_to_cpu(bg->bg_inode_bitmap) | - ((ext4_fsblk_t)le16_to_cpu(bg->bg_inode_bitmap_hi) << 32); + (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? + (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); } -ext4_fsblk_t ext4_inode_table(struct ext4_group_desc *bg) +ext4_fsblk_t ext4_inode_table(struct super_block *sb, + struct ext4_group_desc *bg) { return le32_to_cpu(bg->bg_inode_table) | - ((ext4_fsblk_t)le16_to_cpu(bg->bg_inode_table_hi) << 32); + (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? + (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); } -void ext4_block_bitmap_set(struct ext4_group_desc *bg, ext4_fsblk_t blk) +void ext4_block_bitmap_set(struct super_block *sb, + struct ext4_group_desc *bg, ext4_fsblk_t blk) { bg->bg_block_bitmap = cpu_to_le32((u32)blk); - bg->bg_block_bitmap_hi = cpu_to_le16(blk >> 32); + if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) + bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); } -void ext4_inode_bitmap_set(struct ext4_group_desc *bg, ext4_fsblk_t blk) +void ext4_inode_bitmap_set(struct super_block *sb, + struct ext4_group_desc *bg, ext4_fsblk_t blk) { bg->bg_inode_bitmap = cpu_to_le32((u32)blk); - bg->bg_inode_bitmap_hi = cpu_to_le16(blk >> 32); + if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) + bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); } -void ext4_inode_table_set(struct ext4_group_desc *bg, ext4_fsblk_t blk) +void ext4_inode_table_set(struct super_block *sb, + struct ext4_group_desc *bg, ext4_fsblk_t blk) { bg->bg_inode_table = cpu_to_le32((u32)blk); - bg->bg_inode_table_hi = cpu_to_le16(blk >> 32); + if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) + bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); } /* @@ -1239,7 +1251,7 @@ static int ext4_check_descriptors (struct super_block * sb) if ((i % EXT4_DESC_PER_BLOCK(sb)) == 0) gdp = (struct ext4_group_desc *) sbi->s_group_desc[desc_block++]->b_data; - block_bitmap = ext4_block_bitmap(gdp); + block_bitmap = ext4_block_bitmap(sb, gdp); if (block_bitmap < first_block || block_bitmap > last_block) { ext4_error (sb, "ext4_check_descriptors", @@ -1248,7 +1260,7 @@ static int ext4_check_descriptors (struct super_block * sb) i, block_bitmap); return 0; } - inode_bitmap = ext4_inode_bitmap(gdp); + inode_bitmap = ext4_inode_bitmap(sb, gdp); if (inode_bitmap < first_block || inode_bitmap > last_block) { ext4_error (sb, "ext4_check_descriptors", @@ -1257,7 +1269,7 @@ static int ext4_check_descriptors (struct super_block * sb) i, inode_bitmap); return 0; } - inode_table = ext4_inode_table(gdp); + inode_table = ext4_inode_table(sb, gdp); if (inode_table < first_block || inode_table + sbi->s_itb_per_group > last_block) { @@ -1622,11 +1634,11 @@ static int ext4_fill_super (struct super_block *sb, void *data, int silent) } sbi->s_desc_size = le16_to_cpu(es->s_desc_size); if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { - if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE || + if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || sbi->s_desc_size > EXT4_MAX_DESC_SIZE || sbi->s_desc_size & (sbi->s_desc_size - 1)) { printk(KERN_ERR - "EXT4-fs: unsupported descriptor size %ld\n", + "EXT4-fs: unsupported descriptor size %lu\n", sbi->s_desc_size); goto failed_mount; } |