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Btrfs: Rewrite btrfs_drop_extents

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Rewrite btrfs_drop_extents by using btrfs_duplicate_item, so we can
avoid calling lock_extent within transaction.

Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Yan, Zheng
2009-11-12 09:34:08 +00:00
committed by Chris Mason
parent ad48fd7546
commit 920bbbfb05
5 changed files with 288 additions and 434 deletions
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27
fs/btrfs/inode.c
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@@ -230,8 +230,7 @@ static noinline int cow_file_range_inline(struct btrfs_trans_handle *trans,
return 1;
}
ret = btrfs_drop_extents(trans, root, inode, start,
aligned_end, aligned_end, start,
ret = btrfs_drop_extents(trans, inode, start, aligned_end,
&hint_byte, 1);
BUG_ON(ret);
@@ -1596,7 +1595,6 @@ static int insert_reserved_file_extent(struct btrfs_trans_handle *trans,
struct inode *inode, u64 file_pos,
u64 disk_bytenr, u64 disk_num_bytes,
u64 num_bytes, u64 ram_bytes,
u64 locked_end,
u8 compression, u8 encryption,
u16 other_encoding, int extent_type)
{
@@ -1622,9 +1620,8 @@ static int insert_reserved_file_extent(struct btrfs_trans_handle *trans,
* the caller is expected to unpin it and allow it to be merged
* with the others.
*/
ret = btrfs_drop_extents(trans, root, inode, file_pos,
file_pos + num_bytes, locked_end,
file_pos, &hint, 0);
ret = btrfs_drop_extents(trans, inode, file_pos, file_pos + num_bytes,
&hint, 0);
BUG_ON(ret);
ins.objectid = inode->i_ino;
@@ -1746,7 +1743,7 @@ static int btrfs_finish_ordered_io(struct inode *inode, u64 start, u64 end)
compressed = 1;
if (test_bit(BTRFS_ORDERED_PREALLOC, &ordered_extent->flags)) {
BUG_ON(compressed);
ret = btrfs_mark_extent_written(trans, root, inode,
ret = btrfs_mark_extent_written(trans, inode,
ordered_extent->file_offset,
ordered_extent->file_offset +
ordered_extent->len);
@@ -1758,8 +1755,6 @@ static int btrfs_finish_ordered_io(struct inode *inode, u64 start, u64 end)
ordered_extent->disk_len,
ordered_extent->len,
ordered_extent->len,
ordered_extent->file_offset +
ordered_extent->len,
compressed, 0, 0,
BTRFS_FILE_EXTENT_REG);
unpin_extent_cache(&BTRFS_I(inode)->extent_tree,
@@ -3209,11 +3204,9 @@ int btrfs_cont_expand(struct inode *inode, loff_t size)
if (test_bit(EXTENT_FLAG_VACANCY, &em->flags)) {
u64 hint_byte = 0;
hole_size = last_byte - cur_offset;
err = btrfs_drop_extents(trans, root, inode,
cur_offset,
err = btrfs_drop_extents(trans, inode, cur_offset,
cur_offset + hole_size,
block_end,
cur_offset, &hint_byte, 1);
&hint_byte, 1);
if (err)
break;
@@ -5643,7 +5636,7 @@ out_fail:
static int prealloc_file_range(struct btrfs_trans_handle *trans,
struct inode *inode, u64 start, u64 end,
u64 locked_end, u64 alloc_hint, int mode)
u64 alloc_hint, int mode)
{
struct btrfs_root *root = BTRFS_I(inode)->root;
struct btrfs_key ins;
@@ -5669,8 +5662,7 @@ static int prealloc_file_range(struct btrfs_trans_handle *trans,
ret = insert_reserved_file_extent(trans, inode,
cur_offset, ins.objectid,
ins.offset, ins.offset,
ins.offset, locked_end,
0, 0, 0,
ins.offset, 0, 0, 0,
BTRFS_FILE_EXTENT_PREALLOC);
BUG_ON(ret);
btrfs_drop_extent_cache(inode, cur_offset,
@@ -5779,8 +5771,7 @@ static long btrfs_fallocate(struct inode *inode, int mode,
last_byte = (last_byte + mask) & ~mask;
if (em->block_start == EXTENT_MAP_HOLE) {
ret = prealloc_file_range(trans, inode, cur_offset,
last_byte, locked_end + 1,
alloc_hint, mode);
last_byte, alloc_hint, mode);
if (ret < 0) {
free_extent_map(em);
break;