return desc;
}
+static int ext4_valid_block_bitmap(struct super_block *sb,
+ struct ext4_group_desc *desc,
+ unsigned int block_group,
+ struct buffer_head *bh)
+{
+ ext4_grpblk_t offset;
+ ext4_grpblk_t next_zero_bit;
+ ext4_fsblk_t bitmap_blk;
+ ext4_fsblk_t group_first_block;
+
+ if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) {
+ /* with FLEX_BG, the inode/block bitmaps and itable
+ * blocks may not be in the group at all
+ * so the bitmap validation will be skipped for those groups
+ * or it has to also read the block group where the bitmaps
+ * are located to verify they are set.
+ */
+ return 1;
+ }
+ group_first_block = ext4_group_first_block_no(sb, block_group);
+
+ /* check whether block bitmap block number is set */
+ bitmap_blk = ext4_block_bitmap(sb, desc);
+ offset = bitmap_blk - group_first_block;
+ if (!ext4_test_bit(offset, bh->b_data))
+ /* bad block bitmap */
+ goto err_out;
+
+ /* check whether the inode bitmap block number is set */
+ bitmap_blk = ext4_inode_bitmap(sb, desc);
+ offset = bitmap_blk - group_first_block;
+ if (!ext4_test_bit(offset, bh->b_data))
+ /* bad block bitmap */
+ goto err_out;
+
+ /* check whether the inode table block number is set */
+ bitmap_blk = ext4_inode_table(sb, desc);
+ offset = bitmap_blk - group_first_block;
+ next_zero_bit = ext4_find_next_zero_bit(bh->b_data,
+ offset + EXT4_SB(sb)->s_itb_per_group,
+ offset);
+ if (next_zero_bit >= offset + EXT4_SB(sb)->s_itb_per_group)
+ /* good bitmap for inode tables */
+ return 1;
+
+err_out:
+ ext4_error(sb, __FUNCTION__,
+ "Invalid block bitmap - "
+ "block_group = %d, block = %llu",
+ block_group, bitmap_blk);
+ return 0;
+}
/**
* read_block_bitmap()
* @sb: super block
* @block_group: given block group
*
- * Read the bitmap for a given block_group, reading into the specified
- * slot in the superblock's bitmap cache.
+ * Read the bitmap for a given block_group,and validate the
+ * bits for block/inode/inode tables are set in the bitmaps
*
* Return buffer_head on success or NULL in case of failure.
*/
if (!desc)
return NULL;
bitmap_blk = ext4_block_bitmap(sb, desc);
+ bh = sb_getblk(sb, bitmap_blk);
+ if (unlikely(!bh)) {
+ ext4_error(sb, __FUNCTION__,
+ "Cannot read block bitmap - "
+ "block_group = %d, block_bitmap = %llu",
+ (int)block_group, (unsigned long long)bitmap_blk);
+ return NULL;
+ }
+ if (bh_uptodate_or_lock(bh))
+ return bh;
+
if (desc->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT)) {
- bh = sb_getblk(sb, bitmap_blk);
- if (!buffer_uptodate(bh)) {
- lock_buffer(bh);
- if (!buffer_uptodate(bh)) {
- ext4_init_block_bitmap(sb, bh, block_group,
- desc);
- set_buffer_uptodate(bh);
- }
- unlock_buffer(bh);
- }
- } else {
- bh = sb_bread(sb, bitmap_blk);
+ ext4_init_block_bitmap(sb, bh, block_group, desc);
+ set_buffer_uptodate(bh);
+ unlock_buffer(bh);
+ return bh;
}
- if (!bh)
- ext4_error (sb, __FUNCTION__,
+ if (bh_submit_read(bh) < 0) {
+ put_bh(bh);
+ ext4_error(sb, __FUNCTION__,
"Cannot read block bitmap - "
- "block_group = %lu, block_bitmap = %llu",
- block_group, bitmap_blk);
+ "block_group = %d, block_bitmap = %llu",
+ (int)block_group, (unsigned long long)bitmap_blk);
+ return NULL;
+ }
+ if (!ext4_valid_block_bitmap(sb, desc, block_group, bh)) {
+ put_bh(bh);
+ return NULL;
+ }
+
return bh;
}
/*
* when setting the reservation window size through ioctl before the file
* is open for write (needs block allocation).
*
- * Needs truncate_mutex protection prior to call this function.
+ * Needs down_write(i_data_sem) protection prior to call this function.
*/
void ext4_init_block_alloc_info(struct inode *inode)
{
struct ext4_reserve_window_node *rsv;
spinlock_t *rsv_lock = &EXT4_SB(inode->i_sb)->s_rsv_window_lock;
+ ext4_mb_discard_inode_preallocations(inode);
+
if (!block_i)
return;
* @inode: inode
* @block: start physical block to free
* @count: number of blocks to count
+ * @metadata: Are these metadata blocks
*/
void ext4_free_blocks(handle_t *handle, struct inode *inode,
- ext4_fsblk_t block, unsigned long count)
+ ext4_fsblk_t block, unsigned long count,
+ int metadata)
{
struct super_block * sb;
unsigned long dquot_freed_blocks;
+ /* this isn't the right place to decide whether block is metadata
+ * inode.c/extents.c knows better, but for safety ... */
+ if (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode) ||
+ ext4_should_journal_data(inode))
+ metadata = 1;
+
sb = inode->i_sb;
- if (!sb) {
- printk ("ext4_free_blocks: nonexistent device");
- return;
- }
- ext4_free_blocks_sb(handle, sb, block, count, &dquot_freed_blocks);
+
+ if (!test_opt(sb, MBALLOC) || !EXT4_SB(sb)->s_group_info)
+ ext4_free_blocks_sb(handle, sb, block, count,
+ &dquot_freed_blocks);
+ else
+ ext4_mb_free_blocks(handle, inode, block, count,
+ metadata, &dquot_freed_blocks);
if (dquot_freed_blocks)
DQUOT_FREE_BLOCK(inode, dquot_freed_blocks);
return;
}
/**
- * ext4_new_blocks() -- core block(s) allocation function
+ * ext4_new_blocks_old() -- core block(s) allocation function
* @handle: handle to this transaction
* @inode: file inode
* @goal: given target block(filesystem wide)
* any specific goal block.
*
*/
-ext4_fsblk_t ext4_new_blocks(handle_t *handle, struct inode *inode,
+ext4_fsblk_t ext4_new_blocks_old(handle_t *handle, struct inode *inode,
ext4_fsblk_t goal, unsigned long *count, int *errp)
{
struct buffer_head *bitmap_bh = NULL;
sbi = EXT4_SB(sb);
es = EXT4_SB(sb)->s_es;
- ext4_debug("goal=%lu.\n", goal);
+ ext4_debug("goal=%llu.\n", goal);
/*
* Allocate a block from reservation only when
* filesystem is mounted with reservation(default,-o reservation), and
allocated:
- ext4_debug("using block group %d(%d)\n",
+ ext4_debug("using block group %lu(%d)\n",
group_no, gdp->bg_free_blocks_count);
BUFFER_TRACE(gdp_bh, "get_write_access");
}
ext4_fsblk_t ext4_new_block(handle_t *handle, struct inode *inode,
- ext4_fsblk_t goal, int *errp)
+ ext4_fsblk_t goal, int *errp)
+{
+ struct ext4_allocation_request ar;
+ ext4_fsblk_t ret;
+
+ if (!test_opt(inode->i_sb, MBALLOC)) {
+ unsigned long count = 1;
+ ret = ext4_new_blocks_old(handle, inode, goal, &count, errp);
+ return ret;
+ }
+
+ memset(&ar, 0, sizeof(ar));
+ ar.inode = inode;
+ ar.goal = goal;
+ ar.len = 1;
+ ret = ext4_mb_new_blocks(handle, &ar, errp);
+ return ret;
+}
+
+ext4_fsblk_t ext4_new_blocks(handle_t *handle, struct inode *inode,
+ ext4_fsblk_t goal, unsigned long *count, int *errp)
{
- unsigned long count = 1;
+ struct ext4_allocation_request ar;
+ ext4_fsblk_t ret;
+
+ if (!test_opt(inode->i_sb, MBALLOC)) {
+ ret = ext4_new_blocks_old(handle, inode, goal, count, errp);
+ return ret;
+ }
- return ext4_new_blocks(handle, inode, goal, &count, errp);
+ memset(&ar, 0, sizeof(ar));
+ ar.inode = inode;
+ ar.goal = goal;
+ ar.len = *count;
+ ret = ext4_mb_new_blocks(handle, &ar, errp);
+ *count = ar.len;
+ return ret;
}
+
/**
* ext4_count_free_blocks() -- count filesystem free blocks
* @sb: superblock
brelse(bitmap_bh);
printk("ext4_count_free_blocks: stored = %llu"
", computed = %llu, %llu\n",
- EXT4_FREE_BLOCKS_COUNT(es),
+ ext4_free_blocks_count(es),
desc_count, bitmap_count);
return bitmap_count;
#else
projects / linux-2.6 / blobdiff