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btrfs-progs: Export write_tree_block

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Export write_tree_block() function and allow it write extent without
transaction.

This provides the basis for later uuid change function.

Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
This commit is contained in:
Qu Wenruo 2015-05-11 16:08:46 +08:00 committed by David Sterba
parent 2259f03439
commit 92b020ee04
2 changed files with 5 additions and 2 deletions
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4
disk-io.c
View File

@ -372,7 +372,7 @@ int write_and_map_eb(struct btrfs_trans_handle *trans,
return 0;
}
static int write_tree_block(struct btrfs_trans_handle *trans,
int write_tree_block(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct extent_buffer *eb)
{
@ -381,7 +381,7 @@ static int write_tree_block(struct btrfs_trans_handle *trans,
BUG();
}
if (!btrfs_buffer_uptodate(eb, trans->transid))
if (trans && !btrfs_buffer_uptodate(eb, trans->transid))
BUG();
btrfs_set_header_flag(eb, BTRFS_HEADER_FLAG_WRITTEN);

3
disk-io.h
View File

@ -126,6 +126,9 @@ int csum_tree_block_size(struct extent_buffer *buf, u16 csum_sectorsize,
int verify);
int verify_tree_block_csum_silent(struct extent_buffer *buf, u16 csum_size);
int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid);
int write_tree_block(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct extent_buffer *eb);
int write_and_map_eb(struct btrfs_trans_handle *trans, struct btrfs_root *root,
struct extent_buffer *eb);