diff options
Diffstat (limited to 'fs/ext4/mballoc.c')
| -rw-r--r-- | fs/ext4/mballoc.c | 87 |
1 files changed, 48 insertions, 39 deletions
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c index 34b610ea5030..61eaf74dca37 100644 --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -874,8 +874,10 @@ static int ext4_mb_init_cache(struct page *page, char *incore) bh[i] = NULL; continue; } - if (!(bh[i] = ext4_read_block_bitmap_nowait(sb, group))) { - err = -ENOMEM; + bh[i] = ext4_read_block_bitmap_nowait(sb, group); + if (IS_ERR(bh[i])) { + err = PTR_ERR(bh[i]); + bh[i] = NULL; goto out; } mb_debug(1, "read bitmap for group %u\n", group); @@ -883,8 +885,13 @@ static int ext4_mb_init_cache(struct page *page, char *incore) /* wait for I/O completion */ for (i = 0, group = first_group; i < groups_per_page; i++, group++) { - if (bh[i] && ext4_wait_block_bitmap(sb, group, bh[i])) - err = -EIO; + int err2; + + if (!bh[i]) + continue; + err2 = ext4_wait_block_bitmap(sb, group, bh[i]); + if (!err) + err = err2; } first_block = page->index * blocks_per_page; @@ -2333,7 +2340,7 @@ static int ext4_mb_seq_groups_open(struct inode *inode, struct file *file) } -static const struct file_operations ext4_mb_seq_groups_fops = { +const struct file_operations ext4_seq_mb_groups_fops = { .owner = THIS_MODULE, .open = ext4_mb_seq_groups_open, .read = seq_read, @@ -2447,7 +2454,7 @@ int ext4_mb_add_groupinfo(struct super_block *sb, ext4_group_t group, kmalloc(sb->s_blocksize, GFP_NOFS); BUG_ON(meta_group_info[i]->bb_bitmap == NULL); bh = ext4_read_block_bitmap(sb, group); - BUG_ON(bh == NULL); + BUG_ON(IS_ERR_OR_NULL(bh)); memcpy(meta_group_info[i]->bb_bitmap, bh->b_data, sb->s_blocksize); put_bh(bh); @@ -2661,10 +2668,6 @@ int ext4_mb_init(struct super_block *sb) if (ret != 0) goto out_free_locality_groups; - if (sbi->s_proc) - proc_create_data("mb_groups", S_IRUGO, sbi->s_proc, - &ext4_mb_seq_groups_fops, sb); - return 0; out_free_locality_groups: @@ -2705,9 +2708,6 @@ int ext4_mb_release(struct super_block *sb) struct ext4_sb_info *sbi = EXT4_SB(sb); struct kmem_cache *cachep = get_groupinfo_cache(sb->s_blocksize_bits); - if (sbi->s_proc) - remove_proc_entry("mb_groups", sbi->s_proc); - if (sbi->s_group_info) { for (i = 0; i < ngroups; i++) { grinfo = ext4_get_group_info(sb, i); @@ -2896,10 +2896,12 @@ ext4_mb_mark_diskspace_used(struct ext4_allocation_context *ac, sb = ac->ac_sb; sbi = EXT4_SB(sb); - err = -EIO; bitmap_bh = ext4_read_block_bitmap(sb, ac->ac_b_ex.fe_group); - if (!bitmap_bh) + if (IS_ERR(bitmap_bh)) { + err = PTR_ERR(bitmap_bh); + bitmap_bh = NULL; goto out_err; + } BUFFER_TRACE(bitmap_bh, "getting write access"); err = ext4_journal_get_write_access(handle, bitmap_bh); @@ -3843,8 +3845,10 @@ ext4_mb_discard_group_preallocations(struct super_block *sb, return 0; bitmap_bh = ext4_read_block_bitmap(sb, group); - if (bitmap_bh == NULL) { - ext4_error(sb, "Error reading block bitmap for %u", group); + if (IS_ERR(bitmap_bh)) { + err = PTR_ERR(bitmap_bh); + ext4_error(sb, "Error %d reading block bitmap for %u", + err, group); return 0; } @@ -4015,9 +4019,10 @@ repeat: } bitmap_bh = ext4_read_block_bitmap(sb, group); - if (bitmap_bh == NULL) { - ext4_error(sb, "Error reading block bitmap for %u", - group); + if (IS_ERR(bitmap_bh)) { + err = PTR_ERR(bitmap_bh); + ext4_error(sb, "Error %d reading block bitmap for %u", + err, group); ext4_mb_unload_buddy(&e4b); continue; } @@ -4682,22 +4687,11 @@ void ext4_free_blocks(handle_t *handle, struct inode *inode, ext4_debug("freeing block %llu\n", block); trace_ext4_free_blocks(inode, block, count, flags); - if (flags & EXT4_FREE_BLOCKS_FORGET) { - struct buffer_head *tbh = bh; - int i; - - BUG_ON(bh && (count > 1)); + if (bh && (flags & EXT4_FREE_BLOCKS_FORGET)) { + BUG_ON(count > 1); - for (i = 0; i < count; i++) { - cond_resched(); - if (!bh) - tbh = sb_find_get_block(inode->i_sb, - block + i); - if (!tbh) - continue; - ext4_forget(handle, flags & EXT4_FREE_BLOCKS_METADATA, - inode, tbh, block + i); - } + ext4_forget(handle, flags & EXT4_FREE_BLOCKS_METADATA, + inode, bh, block); } /* @@ -4742,6 +4736,19 @@ void ext4_free_blocks(handle_t *handle, struct inode *inode, count += sbi->s_cluster_ratio - overflow; } + if (!bh && (flags & EXT4_FREE_BLOCKS_FORGET)) { + int i; + + for (i = 0; i < count; i++) { + cond_resched(); + bh = sb_find_get_block(inode->i_sb, block + i); + if (!bh) + continue; + ext4_forget(handle, flags & EXT4_FREE_BLOCKS_METADATA, + inode, bh, block + i); + } + } + do_more: overflow = 0; ext4_get_group_no_and_offset(sb, block, &block_group, &bit); @@ -4761,8 +4768,9 @@ do_more: } count_clusters = EXT4_NUM_B2C(sbi, count); bitmap_bh = ext4_read_block_bitmap(sb, block_group); - if (!bitmap_bh) { - err = -EIO; + if (IS_ERR(bitmap_bh)) { + err = PTR_ERR(bitmap_bh); + bitmap_bh = NULL; goto error_return; } gdp = ext4_get_group_desc(sb, block_group, &gd_bh); @@ -4931,8 +4939,9 @@ int ext4_group_add_blocks(handle_t *handle, struct super_block *sb, } bitmap_bh = ext4_read_block_bitmap(sb, block_group); - if (!bitmap_bh) { - err = -EIO; + if (IS_ERR(bitmap_bh)) { + err = PTR_ERR(bitmap_bh); + bitmap_bh = NULL; goto error_return; } |