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path: root/fs/btrfs/extent-tree.c
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Diffstat (limited to 'fs/btrfs/extent-tree.c')
-rw-r--r--fs/btrfs/extent-tree.c53
1 files changed, 32 insertions, 21 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 5d4d5d8db8e..26b8d340649 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -23,7 +23,8 @@
#include "transaction.h"
static int find_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
- *orig_root, u64 num_blocks, u64 search_start,
+ *orig_root, u64 num_blocks, u64 empty_size,
+ u64 search_start,
u64 search_end, u64 hint_block,
struct btrfs_key *ins, u64 exclude_start,
u64 exclude_nr, int data);
@@ -379,7 +380,7 @@ int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
- ret = find_free_extent(trans, root->fs_info->extent_root, 0, 0,
+ ret = find_free_extent(trans, root->fs_info->extent_root, 0, 0, 0,
(u64)-1, 0, &ins, 0, 0, 0);
if (ret) {
btrfs_free_path(path);
@@ -533,7 +534,7 @@ static int write_one_cache_group(struct btrfs_trans_handle *trans,
struct btrfs_block_group_item *bi;
struct btrfs_key ins;
- ret = find_free_extent(trans, extent_root, 0, 0, (u64)-1, 0, &ins,
+ ret = find_free_extent(trans, extent_root, 0, 0, 0, (u64)-1, 0, &ins,
0, 0, 0);
/* FIXME, set bit to recalc cache groups on next mount */
if (ret)
@@ -708,6 +709,7 @@ static int update_block_group(struct btrfs_trans_handle *trans,
static int try_remove_page(struct address_space *mapping, unsigned long index)
{
int ret;
+ return 0;
ret = invalidate_mapping_pages(mapping, index, index);
return ret;
}
@@ -866,7 +868,7 @@ static int __free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
if (!path)
return -ENOMEM;
- ret = find_free_extent(trans, root, 0, 0, (u64)-1, 0, &ins, 0, 0, 0);
+ ret = find_free_extent(trans, root, 0, 0, 0, (u64)-1, 0, &ins, 0, 0, 0);
if (ret) {
btrfs_free_path(path);
return ret;
@@ -983,8 +985,8 @@ int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
* Any available blocks before search_start are skipped.
*/
static int find_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
- *orig_root, u64 num_blocks, u64 search_start, u64
- search_end, u64 hint_block,
+ *orig_root, u64 num_blocks, u64 empty_size,
+ u64 search_start, u64 search_end, u64 hint_block,
struct btrfs_key *ins, u64 exclude_start,
u64 exclude_nr, int data)
{
@@ -1042,6 +1044,7 @@ static int find_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
data, 1);
}
+ total_needed += empty_size;
path = btrfs_alloc_path();
check_failed:
@@ -1157,9 +1160,11 @@ check_pending:
goto error;
}
search_start = orig_search_start;
- if (wrapped)
+ if (wrapped) {
+ if (!full_scan)
+ total_needed -= empty_size;
full_scan = 1;
- else
+ } else
wrapped = 1;
goto new_group;
}
@@ -1238,9 +1243,11 @@ new_group:
ret = -ENOSPC;
goto error;
}
- if (wrapped)
+ if (wrapped) {
+ if (!full_scan)
+ total_needed -= empty_size;
full_scan = 1;
- else
+ } else
wrapped = 1;
}
block_group = btrfs_lookup_block_group(info, search_start);
@@ -1264,7 +1271,7 @@ error:
*/
int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
struct btrfs_root *root, u64 owner,
- u64 num_blocks, u64 hint_block,
+ u64 num_blocks, u64 empty_size, u64 hint_block,
u64 search_end, struct btrfs_key *ins, int data)
{
int ret;
@@ -1303,7 +1310,7 @@ int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
* in the correct block group.
*/
if (data) {
- ret = find_free_extent(trans, root, 0, 0,
+ ret = find_free_extent(trans, root, 0, 0, 0,
search_end, 0, &prealloc_key, 0, 0, 0);
BUG_ON(ret);
if (ret)
@@ -1313,8 +1320,8 @@ int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
}
/* do the real allocation */
- ret = find_free_extent(trans, root, num_blocks, search_start,
- search_end, hint_block, ins,
+ ret = find_free_extent(trans, root, num_blocks, empty_size,
+ search_start, search_end, hint_block, ins,
exclude_start, exclude_nr, data);
BUG_ON(ret);
if (ret)
@@ -1333,7 +1340,7 @@ int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
exclude_start = ins->objectid;
exclude_nr = ins->offset;
hint_block = exclude_start + exclude_nr;
- ret = find_free_extent(trans, root, 0, search_start,
+ ret = find_free_extent(trans, root, 0, 0, search_start,
search_end, hint_block,
&prealloc_key, exclude_start,
exclude_nr, 0);
@@ -1368,14 +1375,16 @@ int btrfs_alloc_extent(struct btrfs_trans_handle *trans,
* returns the tree buffer or NULL.
*/
struct buffer_head *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
- struct btrfs_root *root, u64 hint)
+ struct btrfs_root *root, u64 hint,
+ u64 empty_size)
{
struct btrfs_key ins;
int ret;
struct buffer_head *buf;
ret = btrfs_alloc_extent(trans, root, root->root_key.objectid,
- 1, hint, (unsigned long)-1, &ins, 0);
+ 1, empty_size, hint,
+ (unsigned long)-1, &ins, 0);
if (ret) {
BUG_ON(ret > 0);
return ERR_PTR(ret);
@@ -1385,6 +1394,7 @@ struct buffer_head *btrfs_alloc_free_block(struct btrfs_trans_handle *trans,
btrfs_free_extent(trans, root, ins.objectid, 1, 0);
return ERR_PTR(-ENOMEM);
}
+ WARN_ON(buffer_dirty(buf));
set_buffer_uptodate(buf);
set_buffer_checked(buf);
set_radix_bit(&trans->transaction->dirty_pages, buf->b_page->index);
@@ -1591,13 +1601,15 @@ int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
struct btrfs_key key;
struct btrfs_disk_key *found_key;
struct btrfs_node *node;
+
btrfs_disk_key_to_cpu(&key, &root_item->drop_progress);
+ level = root_item->drop_level;
+ path->lowest_level = level;
wret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
- if (ret < 0) {
+ if (wret < 0) {
ret = wret;
goto out;
}
- level = root_item->drop_level;
node = btrfs_buffer_node(path->nodes[level]);
found_key = &node->ptrs[path->slots[level]].key;
WARN_ON(memcmp(found_key, &root_item->drop_progress,
@@ -1617,8 +1629,6 @@ int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
ret = wret;
num_walks++;
if (num_walks > 10) {
- struct btrfs_key key;
- btrfs_disk_key_to_cpu(&key, &root_item->drop_progress);
ret = -EAGAIN;
get_bh(root->node);
break;
@@ -1627,6 +1637,7 @@ int btrfs_drop_snapshot(struct btrfs_trans_handle *trans, struct btrfs_root
for (i = 0; i <= orig_level; i++) {
if (path->nodes[i]) {
btrfs_block_release(root, path->nodes[i]);
+ path->nodes[i] = 0;
}
}
out:
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-26 19:02:34 +0000