summaryrefslogtreecommitdiffstats
path: root/fs/btrfs/inode.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/btrfs/inode.c')
-rw-r--r--fs/btrfs/inode.c40
1 files changed, 25 insertions, 15 deletions
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 8edcdf6910f7..4d7c02258390 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -1641,7 +1641,7 @@ static void btrfs_clear_bit_hook(struct inode *inode,
btrfs_delalloc_release_metadata(inode, len);
if (root->root_key.objectid != BTRFS_DATA_RELOC_TREE_OBJECTID
- && do_list)
+ && do_list && !(state->state & EXTENT_NORESERVE))
btrfs_free_reserved_data_space(inode, len);
__percpu_counter_add(&root->fs_info->delalloc_bytes, -len,
@@ -6396,10 +6396,10 @@ out:
* returns 1 when the nocow is safe, < 1 on error, 0 if the
* block must be cow'd
*/
-static noinline int can_nocow_odirect(struct btrfs_trans_handle *trans,
- struct inode *inode, u64 offset, u64 *len,
- u64 *orig_start, u64 *orig_block_len,
- u64 *ram_bytes)
+noinline int can_nocow_extent(struct btrfs_trans_handle *trans,
+ struct inode *inode, u64 offset, u64 *len,
+ u64 *orig_start, u64 *orig_block_len,
+ u64 *ram_bytes)
{
struct btrfs_path *path;
int ret;
@@ -6413,7 +6413,7 @@ static noinline int can_nocow_odirect(struct btrfs_trans_handle *trans,
u64 num_bytes;
int slot;
int found_type;
-
+ bool nocow = (BTRFS_I(inode)->flags & BTRFS_INODE_NODATACOW);
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
@@ -6453,18 +6453,28 @@ static noinline int can_nocow_odirect(struct btrfs_trans_handle *trans,
/* not a regular extent, must cow */
goto out;
}
+
+ if (!nocow && found_type == BTRFS_FILE_EXTENT_REG)
+ goto out;
+
disk_bytenr = btrfs_file_extent_disk_bytenr(leaf, fi);
+ if (disk_bytenr == 0)
+ goto out;
+
+ if (btrfs_file_extent_compression(leaf, fi) ||
+ btrfs_file_extent_encryption(leaf, fi) ||
+ btrfs_file_extent_other_encoding(leaf, fi))
+ goto out;
+
backref_offset = btrfs_file_extent_offset(leaf, fi);
- *orig_start = key.offset - backref_offset;
- *orig_block_len = btrfs_file_extent_disk_num_bytes(leaf, fi);
- *ram_bytes = btrfs_file_extent_ram_bytes(leaf, fi);
+ if (orig_start) {
+ *orig_start = key.offset - backref_offset;
+ *orig_block_len = btrfs_file_extent_disk_num_bytes(leaf, fi);
+ *ram_bytes = btrfs_file_extent_ram_bytes(leaf, fi);
+ }
extent_end = key.offset + btrfs_file_extent_num_bytes(leaf, fi);
- if (extent_end < offset + *len) {
- /* extent doesn't include our full range, must cow */
- goto out;
- }
if (btrfs_extent_readonly(root, disk_bytenr))
goto out;
@@ -6708,8 +6718,8 @@ static int btrfs_get_blocks_direct(struct inode *inode, sector_t iblock,
if (IS_ERR(trans))
goto must_cow;
- if (can_nocow_odirect(trans, inode, start, &len, &orig_start,
- &orig_block_len, &ram_bytes) == 1) {
+ if (can_nocow_extent(trans, inode, start, &len, &orig_start,
+ &orig_block_len, &ram_bytes) == 1) {
if (type == BTRFS_ORDERED_PREALLOC) {
free_extent_map(em);
em = create_pinned_em(inode, start, len,