Skip to content

Commit

Permalink
Btrfs: Fix i_blocks accounting
Browse files Browse the repository at this point in the history 
Now that delayed allocation accounting works, i_blocks accounting is changed
to only modify i_blocks when extents inserted or removed.

The fillattr call is changed to include the delayed allocation byte count
in the i_blocks result.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
  • Loading branch information
Chris Mason committed Sep 25, 2008
1 parent a86c12c commit 9069218
Show file tree
Hide file tree
Showing 4 changed files with 50 additions and 20 deletions.
1 change: 1 addition & 0 deletions fs/btrfs/btrfs_inode.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -36,6 +36,7 @@ struct btrfs_inode {
* transid of the trans_handle that last modified this inode
*/
u64 last_trans;
u64 delalloc_bytes;
u32 flags;
};
static inline struct btrfs_inode *BTRFS_I(struct inode *inode)
Expand Down
9 changes: 9 additions & 0 deletions fs/btrfs/ctree.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -1161,6 +1161,15 @@ int btrfs_csum_truncate(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct btrfs_path *path,
u64 isize);
/* inode.c */
static inline void dec_i_blocks(struct inode *inode, u64 dec)
{
dec = dec >> 9;
if (dec <= inode->i_blocks)
inode->i_blocks -= dec;
else
inode->i_blocks = 0;
}

unsigned long btrfs_force_ra(struct address_space *mapping,
struct file_ra_state *ra, struct file *file,
pgoff_t offset, pgoff_t last_index);
Expand Down
17 changes: 11 additions & 6 deletions fs/btrfs/file.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -175,6 +175,7 @@ static int noinline insert_inline_extent(struct btrfs_trans_handle *trans,
leaf = path->nodes[0];
ei = btrfs_item_ptr(leaf, path->slots[0],
struct btrfs_file_extent_item);
inode->i_blocks += (offset + size - found_end) >> 9;
}
if (found_end < offset) {
ptr = btrfs_file_extent_inline_start(ei) + found_size;
Expand All @@ -184,6 +185,7 @@ static int noinline insert_inline_extent(struct btrfs_trans_handle *trans,
insert:
btrfs_release_path(root, path);
datasize = offset + size - key.offset;
inode->i_blocks += datasize >> 9;
datasize = btrfs_file_extent_calc_inline_size(datasize);
ret = btrfs_insert_empty_item(trans, root, path, &key,
datasize);
Expand Down Expand Up @@ -256,7 +258,6 @@ static int noinline dirty_and_release_pages(struct btrfs_trans_handle *trans,
goto out_unlock;
}
btrfs_set_trans_block_group(trans, inode);
inode->i_blocks += num_bytes >> 9;
hint_byte = 0;

if ((end_of_last_block & 4095) == 0) {
Expand Down Expand Up @@ -410,7 +411,7 @@ int btrfs_check_file(struct btrfs_root *root, struct inode *inode)
if (found_key.type != BTRFS_EXTENT_DATA_KEY)
goto out;

if (found_key.offset != last_offset) {
if (found_key.offset < last_offset) {
WARN_ON(1);
btrfs_print_leaf(root, leaf);
printk("inode %lu found offset %Lu expected %Lu\n",
Expand All @@ -435,7 +436,7 @@ int btrfs_check_file(struct btrfs_root *root, struct inode *inode)
last_offset = extent_end;
path->slots[0]++;
}
if (last_offset < inode->i_size) {
if (0 && last_offset < inode->i_size) {
WARN_ON(1);
btrfs_print_leaf(root, leaf);
printk("inode %lu found offset %Lu size %Lu\n", inode->i_ino,
Expand Down Expand Up @@ -608,8 +609,7 @@ int btrfs_drop_extents(struct btrfs_trans_handle *trans,
extent);
if (btrfs_file_extent_disk_bytenr(leaf,
extent)) {
inode->i_blocks -=
(old_num - new_num) >> 9;
dec_i_blocks(inode, old_num - new_num);
}
btrfs_set_file_extent_num_bytes(leaf, extent,
new_num);
Expand All @@ -620,6 +620,8 @@ int btrfs_drop_extents(struct btrfs_trans_handle *trans,
u32 new_size;
new_size = btrfs_file_extent_calc_inline_size(
inline_limit - key.offset);
dec_i_blocks(inode, (extent_end - key.offset) -
(inline_limit - key.offset));
btrfs_truncate_item(trans, root, path,
new_size, 1);
}
Expand Down Expand Up @@ -653,7 +655,7 @@ int btrfs_drop_extents(struct btrfs_trans_handle *trans,
btrfs_release_path(root, path);
extent = NULL;
if (found_extent && disk_bytenr != 0) {
inode->i_blocks -= extent_num_bytes >> 9;
dec_i_blocks(inode, extent_num_bytes);
ret = btrfs_free_extent(trans, root,
disk_bytenr,
disk_num_bytes,
Expand All @@ -674,6 +676,8 @@ int btrfs_drop_extents(struct btrfs_trans_handle *trans,
u32 new_size;
new_size = btrfs_file_extent_calc_inline_size(
extent_end - end);
dec_i_blocks(inode, (extent_end - key.offset) -
(extent_end - end));
btrfs_truncate_item(trans, root, path, new_size, 0);
}
/* create bookend, splitting the extent in two */
Expand Down Expand Up @@ -718,6 +722,7 @@ int btrfs_drop_extents(struct btrfs_trans_handle *trans,
}
out:
btrfs_free_path(path);
btrfs_check_file(root, inode);
return ret;
}

Expand Down
43 changes: 29 additions & 14 deletions fs/btrfs/inode.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -134,6 +134,7 @@ static int cow_file_range(struct inode *inode, u64 start, u64 end)
ret = btrfs_insert_file_extent(trans, root, inode->i_ino,
start, ins.objectid, ins.offset,
ins.offset);
inode->i_blocks += ins.offset >> 9;
btrfs_check_file(root, inode);
num_bytes -= cur_alloc_size;
alloc_hint = ins.objectid + ins.offset;
Expand All @@ -142,6 +143,7 @@ static int cow_file_range(struct inode *inode, u64 start, u64 end)
btrfs_drop_extent_cache(inode, orig_start,
orig_start + orig_num_bytes - 1);
btrfs_add_ordered_inode(inode);
btrfs_update_inode(trans, root, inode);
out:
btrfs_end_transaction(trans, root);
return ret;
Expand Down Expand Up @@ -265,6 +267,7 @@ int btrfs_set_bit_hook(struct inode *inode, u64 start, u64 end,
if (!(old & EXTENT_DELALLOC) && (bits & EXTENT_DELALLOC)) {
struct btrfs_root *root = BTRFS_I(inode)->root;
spin_lock(&root->fs_info->delalloc_lock);
BTRFS_I(inode)->delalloc_bytes += end - start + 1;
root->fs_info->delalloc_bytes += end - start + 1;
spin_unlock(&root->fs_info->delalloc_lock);
}
Expand All @@ -281,8 +284,10 @@ int btrfs_clear_bit_hook(struct inode *inode, u64 start, u64 end,
printk("warning: delalloc account %Lu %Lu\n",
end - start + 1, root->fs_info->delalloc_bytes);
root->fs_info->delalloc_bytes = 0;
BTRFS_I(inode)->delalloc_bytes = 0;
} else {
root->fs_info->delalloc_bytes -= end - start + 1;
BTRFS_I(inode)->delalloc_bytes -= end - start + 1;
}
spin_unlock(&root->fs_info->delalloc_lock);
}
Expand Down Expand Up @@ -833,32 +838,37 @@ static int btrfs_truncate_in_trans(struct btrfs_trans_handle *trans,
btrfs_set_file_extent_num_bytes(leaf, fi,
extent_num_bytes);
num_dec = (orig_num_bytes -
extent_num_bytes) >> 9;
if (extent_start != 0) {
inode->i_blocks -= num_dec;
}
extent_num_bytes);
if (extent_start != 0)
dec_i_blocks(inode, num_dec);
btrfs_mark_buffer_dirty(leaf);
} else {
extent_num_bytes =
btrfs_file_extent_disk_num_bytes(leaf,
fi);
/* FIXME blocksize != 4096 */
num_dec = btrfs_file_extent_num_bytes(leaf,
fi) >> 9;
num_dec = btrfs_file_extent_num_bytes(leaf, fi);
if (extent_start != 0) {
found_extent = 1;
inode->i_blocks -= num_dec;
dec_i_blocks(inode, num_dec);
}
root_gen = btrfs_header_generation(leaf);
root_owner = btrfs_header_owner(leaf);
}
} else if (extent_type == BTRFS_FILE_EXTENT_INLINE &&
!del_item) {
u32 newsize = inode->i_size - found_key.offset;
newsize = btrfs_file_extent_calc_inline_size(newsize);
ret = btrfs_truncate_item(trans, root, path,
newsize, 1);
BUG_ON(ret);
} else if (extent_type == BTRFS_FILE_EXTENT_INLINE) {
if (!del_item) {
u32 newsize = inode->i_size - found_key.offset;
dec_i_blocks(inode, item_end + 1 -
found_key.offset - newsize);
newsize =
btrfs_file_extent_calc_inline_size(newsize);
ret = btrfs_truncate_item(trans, root, path,
newsize, 1);
BUG_ON(ret);
} else {
dec_i_blocks(inode, item_end + 1 -
found_key.offset);
}
}
delete:
if (del_item) {
Expand Down Expand Up @@ -1222,6 +1232,7 @@ static int btrfs_init_locked_inode(struct inode *inode, void *p)
struct btrfs_iget_args *args = p;
inode->i_ino = args->ino;
BTRFS_I(inode)->root = args->root;
BTRFS_I(inode)->delalloc_bytes = 0;
extent_map_tree_init(&BTRFS_I(inode)->extent_tree, GFP_NOFS);
extent_io_tree_init(&BTRFS_I(inode)->io_tree,
inode->i_mapping, GFP_NOFS);
Expand Down Expand Up @@ -1528,6 +1539,7 @@ static struct inode *btrfs_new_inode(struct btrfs_trans_handle *trans,
extent_map_tree_init(&BTRFS_I(inode)->extent_tree, GFP_NOFS);
extent_io_tree_init(&BTRFS_I(inode)->io_tree,
inode->i_mapping, GFP_NOFS);
BTRFS_I(inode)->delalloc_bytes = 0;
BTRFS_I(inode)->root = root;

if (mode & S_IFDIR)
Expand Down Expand Up @@ -1746,6 +1758,7 @@ static int btrfs_create(struct inode *dir, struct dentry *dentry,
extent_map_tree_init(&BTRFS_I(inode)->extent_tree, GFP_NOFS);
extent_io_tree_init(&BTRFS_I(inode)->io_tree,
inode->i_mapping, GFP_NOFS);
BTRFS_I(inode)->delalloc_bytes = 0;
BTRFS_I(inode)->io_tree.ops = &btrfs_extent_io_ops;
}
dir->i_sb->s_dirt = 1;
Expand Down Expand Up @@ -2797,6 +2810,7 @@ static int btrfs_getattr(struct vfsmount *mnt,
struct inode *inode = dentry->d_inode;
generic_fillattr(inode, stat);
stat->blksize = PAGE_CACHE_SIZE;
stat->blocks = inode->i_blocks + (BTRFS_I(inode)->delalloc_bytes >> 9);
return 0;
}

Expand Down Expand Up @@ -2912,6 +2926,7 @@ static int btrfs_symlink(struct inode *dir, struct dentry *dentry,
extent_map_tree_init(&BTRFS_I(inode)->extent_tree, GFP_NOFS);
extent_io_tree_init(&BTRFS_I(inode)->io_tree,
inode->i_mapping, GFP_NOFS);
BTRFS_I(inode)->delalloc_bytes = 0;
BTRFS_I(inode)->io_tree.ops = &btrfs_extent_io_ops;
}
dir->i_sb->s_dirt = 1;
Expand Down

0 comments on commit 9069218

Please sign in to comment.