#include "transaction.h"
static void reada_defrag(struct btrfs_root *root,
- struct btrfs_node *node)
+ struct extent_buffer *node)
{
int i;
u32 nritems;
- u64 blocknr;
+ u64 bytenr;
+ u32 blocksize;
int ret;
- nritems = btrfs_header_nritems(&node->header);
+ blocksize = btrfs_level_size(root, btrfs_header_level(node) - 1);
+ nritems = btrfs_header_nritems(node);
for (i = 0; i < nritems; i++) {
- blocknr = btrfs_node_blockptr(node, i);
- ret = readahead_tree_block(root, blocknr);
+ bytenr = btrfs_node_blockptr(node, i);
+ ret = readahead_tree_block(root, bytenr, blocksize);
if (ret)
break;
}
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;
+ struct extent_buffer *next;
+ struct extent_buffer *cur;
+ u64 bytenr;
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;
+
+ if (*level == 1 && cache_only && path->nodes[1] &&
+ !btrfs_buffer_defrag(path->nodes[1])) {
+ goto out;
+ }
while(*level > 0) {
WARN_ON(*level < 0);
WARN_ON(*level >= BTRFS_MAX_LEVEL);
cur = path->nodes[*level];
if (!cache_only && *level > 1 && path->slots[*level] == 0)
- reada_defrag(root, btrfs_buffer_node(cur));
+ reada_defrag(root, cur);
- if (btrfs_header_level(btrfs_buffer_header(cur)) != *level)
+ if (btrfs_header_level(cur) != *level)
WARN_ON(1);
if (path->slots[*level] >=
- btrfs_header_nritems(btrfs_buffer_header(cur)))
+ btrfs_header_nritems(cur))
break;
if (*level == 1) {
+ WARN_ON(btrfs_header_generation(path->nodes[*level]) !=
+ trans->transid);
ret = btrfs_realloc_node(trans, root,
path->nodes[*level],
- cache_only);
+ path->slots[*level],
+ cache_only, last_ret,
+ &root->defrag_progress);
+ if (is_extent)
+ btrfs_extent_post_op(trans, root);
+
break;
}
- blocknr = btrfs_node_blockptr(btrfs_buffer_node(cur),
- path->slots[*level]);
+ bytenr = btrfs_node_blockptr(cur, path->slots[*level]);
if (cache_only) {
- next = btrfs_find_tree_block(root, blocknr);
- if (!next || !buffer_uptodate(next) ||
- buffer_locked(next)) {
- brelse(next);
+ next = btrfs_find_tree_block(root, bytenr,
+ btrfs_level_size(root, *level - 1));
+ if (!next || !btrfs_buffer_uptodate(next) ||
+ !btrfs_buffer_defrag(next)) {
+ free_extent_buffer(next);
path->slots[*level]++;
continue;
}
} else {
- next = read_tree_block(root, blocknr);
+ next = read_tree_block(root, bytenr,
+ btrfs_level_size(root, *level - 1));
}
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);
- 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]);
+ free_extent_buffer(path->nodes[*level-1]);
path->nodes[*level-1] = next;
- *level = btrfs_header_level(btrfs_buffer_header(next));
+ *level = btrfs_header_level(next);
path->slots[*level] = 0;
}
WARN_ON(*level < 0);
WARN_ON(*level >= BTRFS_MAX_LEVEL);
- btrfs_block_release(root, path->nodes[*level]);
+
+ btrfs_clear_buffer_defrag(path->nodes[*level]);
+out:
+ free_extent_buffer(path->nodes[*level]);
path->nodes[*level] = NULL;
*level += 1;
- WARN_ON(ret);
- return 0;
+ WARN_ON(ret && ret != -EAGAIN);
+ return ret;
}
static int defrag_walk_up(struct btrfs_trans_handle *trans,
{
int i;
int slot;
- struct btrfs_node *node;
+ struct extent_buffer *node;
for(i = *level; i < BTRFS_MAX_LEVEL - 1 && path->nodes[i]; i++) {
slot = path->slots[i];
- if (slot < btrfs_header_nritems(
- btrfs_buffer_header(path->nodes[i])) - 1) {
+ if (slot < btrfs_header_nritems(path->nodes[i]) - 1) {
path->slots[i]++;
*level = i;
- node = btrfs_buffer_node(path->nodes[i]);
+ node = path->nodes[i];
WARN_ON(i == 0);
- btrfs_disk_key_to_cpu(&root->defrag_progress,
- &node->ptrs[path->slots[i]].key);
+ btrfs_node_key_to_cpu(node, &root->defrag_progress,
+ path->slots[i]);
root->defrag_level = i;
return 0;
} else {
- btrfs_block_release(root, path->nodes[*level]);
+ btrfs_clear_buffer_defrag(path->nodes[*level]);
+ free_extent_buffer(path->nodes[*level]);
path->nodes[*level] = NULL;
*level = i + 1;
}
struct btrfs_root *root, int cache_only)
{
struct btrfs_path *path = NULL;
- struct buffer_head *tmp;
+ struct extent_buffer *tmp;
int ret = 0;
int wret;
int level;
int orig_level;
int i;
- int num_runs = 0;
+ 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;
- }
+
+ if (btrfs_test_opt(root, SSD))
+ goto out;
+
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
- level = btrfs_header_level(btrfs_buffer_header(root->node));
+ level = btrfs_header_level(root->node);
orig_level = level;
+
if (level == 0) {
goto out;
}
if (root->defrag_progress.objectid == 0) {
- get_bh(root->node);
+ extent_buffer_get(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);
- 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;
}
+
while(level > 0 && !path->nodes[level])
level--;
+
if (!path->nodes[level]) {
ret = 0;
goto out;
}
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)
break;
if (wret < 0)
ret = wret;
- if (num_runs++ > 8) {
+ else
ret = -EAGAIN;
- break;
- }
+ break;
}
for (i = 0; i <= orig_level; i++) {
if (path->nodes[i]) {
- btrfs_block_release(root, path->nodes[i]);
- path->nodes[i] = 0;
+ free_extent_buffer(path->nodes[i]);
+ path->nodes[i] = NULL;
}
}
out:
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff