Export write_tree_block() function, and allow it to write data to disk without transaction.
This is useful for resetting tree block csum, where the reset is done level by level, so btrfs_search_slot() is doing lowest_level search and can't do cow (cow with lowest_level will screw up extent backref). Signed-off-by: Qu Wenruo <[email protected]> --- disk-io.c | 4 ++-- disk-io.h | 3 +++ 2 files changed, 5 insertions(+), 2 deletions(-) diff --git a/disk-io.c b/disk-io.c index 747ef15..755cb7c 100644 --- a/disk-io.c +++ b/disk-io.c @@ -371,7 +371,7 @@ 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) { @@ -380,7 +380,7 @@ 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); diff --git a/disk-io.h b/disk-io.h index c3eceaa..0cbe2dc 100644 --- a/disk-io.h +++ b/disk-io.h @@ -59,6 +59,9 @@ struct btrfs_device; int read_whole_eb(struct btrfs_fs_info *info, struct extent_buffer *eb, int mirror); struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize, u64 parent_transid); +int write_tree_block(struct btrfs_trans_handle *trans, + struct btrfs_root *root, + struct extent_buffer *eb); void readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize, u64 parent_transid); struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root, -- 2.2.2 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
