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Diffstat (limited to 'fs/btrfs/backref.c')
-rw-r--r--fs/btrfs/backref.c48
1 files changed, 29 insertions, 19 deletions
diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
index eaf133384a8f..8bc5e8ccb091 100644
--- a/fs/btrfs/backref.c
+++ b/fs/btrfs/backref.c
@@ -36,16 +36,23 @@ static int check_extent_in_eb(struct btrfs_key *key, struct extent_buffer *eb,
u64 extent_item_pos,
struct extent_inode_elem **eie)
{
- u64 data_offset;
- u64 data_len;
+ u64 offset = 0;
struct extent_inode_elem *e;
- data_offset = btrfs_file_extent_offset(eb, fi);
- data_len = btrfs_file_extent_num_bytes(eb, fi);
+ if (!btrfs_file_extent_compression(eb, fi) &&
+ !btrfs_file_extent_encryption(eb, fi) &&
+ !btrfs_file_extent_other_encoding(eb, fi)) {
+ u64 data_offset;
+ u64 data_len;
- if (extent_item_pos < data_offset ||
- extent_item_pos >= data_offset + data_len)
- return 1;
+ data_offset = btrfs_file_extent_offset(eb, fi);
+ data_len = btrfs_file_extent_num_bytes(eb, fi);
+
+ if (extent_item_pos < data_offset ||
+ extent_item_pos >= data_offset + data_len)
+ return 1;
+ offset = extent_item_pos - data_offset;
+ }
e = kmalloc(sizeof(*e), GFP_NOFS);
if (!e)
@@ -53,7 +60,7 @@ static int check_extent_in_eb(struct btrfs_key *key, struct extent_buffer *eb,
e->next = *eie;
e->inum = key->objectid;
- e->offset = key->offset + (extent_item_pos - data_offset);
+ e->offset = key->offset + offset;
*eie = e;
return 0;
@@ -189,7 +196,7 @@ static int add_all_parents(struct btrfs_root *root, struct btrfs_path *path,
struct extent_buffer *eb;
struct btrfs_key key;
struct btrfs_file_extent_item *fi;
- struct extent_inode_elem *eie = NULL;
+ struct extent_inode_elem *eie = NULL, *old = NULL;
u64 disk_byte;
if (level != 0) {
@@ -223,6 +230,7 @@ static int add_all_parents(struct btrfs_root *root, struct btrfs_path *path,
if (disk_byte == wanted_disk_byte) {
eie = NULL;
+ old = NULL;
if (extent_item_pos) {
ret = check_extent_in_eb(&key, eb, fi,
*extent_item_pos,
@@ -230,18 +238,20 @@ static int add_all_parents(struct btrfs_root *root, struct btrfs_path *path,
if (ret < 0)
break;
}
- if (!ret) {
- ret = ulist_add(parents, eb->start,
- (uintptr_t)eie, GFP_NOFS);
- if (ret < 0)
- break;
- if (!extent_item_pos) {
- ret = btrfs_next_old_leaf(root, path,
- time_seq);
- continue;
- }
+ if (ret > 0)
+ goto next;
+ ret = ulist_add_merge(parents, eb->start,
+ (uintptr_t)eie,
+ (u64 *)&old, GFP_NOFS);
+ if (ret < 0)
+ break;
+ if (!ret && extent_item_pos) {
+ while (old->next)
+ old = old->next;
+ old->next = eie;
}
}
+next:
ret = btrfs_next_old_item(root, path, time_seq);
}