lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Btrfs: Btree defrag on the extent-mapping tree as well

Browse Source 
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason
2007-08-10 14:06:19 -04:00
committed by David Woodhouse
parent 409eb95d7f
commit e9d0b13b5b
8 changed files with 125 additions and 79 deletions
Download Patch File Download Diff File Expand all files Collapse all files

36
fs/btrfs/tree-defrag.c
View File

@@ -42,16 +42,20 @@ static void reada_defrag(struct btrfs_root *root,
static int defrag_walk_down(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_path *path, int *level,
int cache_only)
int cache_only, u64 *last_ret)
{
struct buffer_head *next;
struct buffer_head *cur;
u64 blocknr;
int ret = 0;
int is_extent = 0;
WARN_ON(*level < 0);
WARN_ON(*level >= BTRFS_MAX_LEVEL);
if (root->fs_info->extent_root == root)
is_extent = 1;
while(*level > 0) {
WARN_ON(*level < 0);
WARN_ON(*level >= BTRFS_MAX_LEVEL);
@@ -70,7 +74,10 @@ static int defrag_walk_down(struct btrfs_trans_handle *trans,
if (*level == 1) {
ret = btrfs_realloc_node(trans, root,
path->nodes[*level],
cache_only);
cache_only, last_ret);
if (is_extent)
btrfs_extent_post_op(trans, root);
break;
}
blocknr = btrfs_node_blockptr(btrfs_buffer_node(cur),
@@ -90,8 +97,13 @@ static int defrag_walk_down(struct btrfs_trans_handle *trans,
ret = btrfs_cow_block(trans, root, next, path->nodes[*level],
path->slots[*level], &next);
BUG_ON(ret);
ret = btrfs_realloc_node(trans, root, next, cache_only);
ret = btrfs_realloc_node(trans, root, next, cache_only,
last_ret);
BUG_ON(ret);
if (is_extent)
btrfs_extent_post_op(trans, root);
WARN_ON(*level <= 0);
if (path->nodes[*level-1])
btrfs_block_release(root, path->nodes[*level-1]);
@@ -148,10 +160,14 @@ int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
int level;
int orig_level;
int i;
int is_extent = 0;
u64 last_ret = 0;
if (root->ref_cows == 0) {
if (root->fs_info->extent_root == root)
is_extent = 1;
if (root->ref_cows == 0 && !is_extent)
goto out;
}
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
@@ -165,16 +181,21 @@ int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
get_bh(root->node);
ret = btrfs_cow_block(trans, root, root->node, NULL, 0, &tmp);
BUG_ON(ret);
ret = btrfs_realloc_node(trans, root, root->node, cache_only);
ret = btrfs_realloc_node(trans, root, root->node, cache_only,
&last_ret);
BUG_ON(ret);
path->nodes[level] = root->node;
path->slots[level] = 0;
if (is_extent)
btrfs_extent_post_op(trans, root);
} else {
level = root->defrag_level;
path->lowest_level = level;
wret = btrfs_search_slot(trans, root, &root->defrag_progress,
path, 0, 1);
if (is_extent)
btrfs_extent_post_op(trans, root);
if (wret < 0) {
ret = wret;
goto out;
@@ -188,7 +209,8 @@ int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
}
while(1) {
wret = defrag_walk_down(trans, root, path, &level, cache_only);
wret = defrag_walk_down(trans, root, path, &level, cache_only,
&last_ret);
if (wret > 0)
break;
if (wret < 0)