#include "print-tree.h"
#include "transaction.h"
-static int find_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root
- *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);
static int finish_current_insert(struct btrfs_trans_handle *trans, struct
btrfs_root *extent_root);
static int del_pending_extents(struct btrfs_trans_handle *trans, struct
if (cache->data)
goto out;
- if (num > 1) {
- last = max(last, cache->last_prealloc);
- }
again:
ret = cache_block_group(root, cache);
if (ret)
struct btrfs_key key;
struct btrfs_leaf *l;
struct btrfs_extent_item *item;
- struct btrfs_key ins;
u32 refs;
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
- 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);
- return ret;
- }
+
key.objectid = blocknr;
key.flags = 0;
btrfs_set_key_type(&key, BTRFS_EXTENT_ITEM_KEY);
int pending_ret;
struct btrfs_root *extent_root = root->fs_info->extent_root;
struct btrfs_block_group_item *bi;
- struct btrfs_key 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)
- return ret;
ret = btrfs_search_slot(trans, extent_root, &cache->key, path, 0, 1);
if (ret < 0)
goto fail;
return 0;
}
-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;
-}
-
int btrfs_copy_pinned(struct btrfs_root *root, struct radix_tree_root *copy)
{
unsigned long gang[8];
last = gang[i] + 1;
}
}
+ ret = find_first_radix_bit(&root->fs_info->extent_ins_radix, gang, 0,
+ ARRAY_SIZE(gang));
+ WARN_ON(ret);
return 0;
}
struct radix_tree_root *unpin_radix)
{
unsigned long gang[8];
- struct inode *btree_inode = root->fs_info->btree_inode;
struct btrfs_block_group_cache *block_group;
u64 first = 0;
int ret;
block_group->pinned--;
if (gang[i] < block_group->last_alloc)
block_group->last_alloc = gang[i];
- if (gang[i] < block_group->last_prealloc)
- block_group->last_prealloc = gang[i];
if (!block_group->data)
set_radix_bit(extent_radix, gang[i]);
}
- try_remove_page(btree_inode->i_mapping,
- gang[i] << (PAGE_CACHE_SHIFT -
- btree_inode->i_blkbits));
}
}
return 0;
struct btrfs_extent_item extent_item;
int i;
int ret;
- u64 super_blocks_used;
+ int err;
+ unsigned long gang[8];
struct btrfs_fs_info *info = extent_root->fs_info;
btrfs_set_extent_refs(&extent_item, 1);
btrfs_set_key_type(&ins, BTRFS_EXTENT_ITEM_KEY);
btrfs_set_extent_owner(&extent_item, extent_root->root_key.objectid);
- for (i = 0; i < extent_root->fs_info->extent_tree_insert_nr; i++) {
- ins.objectid = extent_root->fs_info->extent_tree_insert[i];
- super_blocks_used = btrfs_super_blocks_used(&info->super_copy);
- btrfs_set_super_blocks_used(&info->super_copy,
- super_blocks_used + 1);
- ret = btrfs_insert_item(trans, extent_root, &ins, &extent_item,
- sizeof(extent_item));
- BUG_ON(ret);
+ while(1) {
+ ret = find_first_radix_bit(&info->extent_ins_radix, gang, 0,
+ ARRAY_SIZE(gang));
+ if (!ret)
+ break;
+
+ for (i = 0; i < ret; i++) {
+ ins.objectid = gang[i];
+ err = btrfs_insert_item(trans, extent_root, &ins,
+ &extent_item,
+ sizeof(extent_item));
+ clear_radix_bit(&info->extent_ins_radix, gang[i]);
+ WARN_ON(err);
+ }
}
- extent_root->fs_info->extent_tree_insert_nr = 0;
return 0;
}
struct btrfs_root *extent_root = info->extent_root;
int ret;
struct btrfs_extent_item *ei;
- struct btrfs_key ins;
u32 refs;
key.objectid = blocknr;
if (!path)
return -ENOMEM;
- ret = find_free_extent(trans, root, 0, 0, 0, (u64)-1, 0, &ins, 0, 0, 0);
- if (ret) {
- btrfs_free_path(path);
- return ret;
- }
-
ret = btrfs_search_slot(trans, extent_root, &key, path, -1, 1);
if (ret < 0)
return ret;
struct btrfs_root * root = orig_root->fs_info->extent_root;
struct btrfs_fs_info *info = root->fs_info;
int total_needed = num_blocks;
- int total_found = 0;
- int fill_prealloc = 0;
int level;
struct btrfs_block_group_cache *block_group;
int full_scan = 0;
int wrapped = 0;
u64 limit;
+ WARN_ON(num_blocks < 1);
ins->flags = 0;
btrfs_set_key_type(ins, BTRFS_EXTENT_ITEM_KEY);
level = btrfs_header_level(btrfs_buffer_header(root->node));
- if (num_blocks == 0) {
- fill_prealloc = 1;
- num_blocks = 1;
- total_needed = (min(level + 1, BTRFS_MAX_LEVEL)) * 6;
- }
- if (fill_prealloc) {
- u64 first;
- int nr = info->extent_tree_prealloc_nr;
- first = info->extent_tree_prealloc[nr - 1];
- if (info->extent_tree_prealloc_nr >= total_needed &&
- first >= search_start) {
- ins->objectid = info->extent_tree_prealloc[0];
- ins->offset = 1;
- return 0;
- }
- info->extent_tree_prealloc_nr = 0;
- }
if (search_end == (u64)-1)
search_end = btrfs_super_total_blocks(&info->super_copy);
if (hint_block) {
l = btrfs_buffer_leaf(path->nodes[0]);
slot = path->slots[0];
if (slot >= btrfs_header_nritems(&l->header)) {
- if (fill_prealloc) {
- info->extent_tree_prealloc_nr = 0;
- total_found = 0;
- }
if (start_found)
limit = last_block +
(block_group->key.offset >> 1);
}
for (test_block = ins->objectid;
test_block < ins->objectid + num_blocks; test_block++) {
- if (test_radix_bit(&info->pinned_radix, test_block)) {
+ if (test_radix_bit(&info->pinned_radix, test_block) ||
+ test_radix_bit(&info->extent_ins_radix, test_block)) {
search_start = test_block + 1;
goto new_group;
}
}
- if (!fill_prealloc && info->extent_tree_insert_nr) {
- u64 last =
- info->extent_tree_insert[info->extent_tree_insert_nr - 1];
- if (ins->objectid + num_blocks >
- info->extent_tree_insert[0] &&
- ins->objectid <= last) {
- search_start = last + 1;
- WARN_ON(!full_scan);
- goto new_group;
- }
- }
- if (!fill_prealloc && info->extent_tree_prealloc_nr) {
- u64 first =
- info->extent_tree_prealloc[info->extent_tree_prealloc_nr - 1];
- if (ins->objectid + num_blocks > first &&
- ins->objectid <= info->extent_tree_prealloc[0]) {
- search_start = info->extent_tree_prealloc[0] + 1;
- goto new_group;
- }
- }
if (exclude_nr > 0 && (ins->objectid + num_blocks > exclude_start &&
ins->objectid < exclude_start + exclude_nr)) {
search_start = exclude_start + exclude_nr;
goto new_group;
}
- if (fill_prealloc) {
- int nr;
- test_block = ins->objectid;
- if (test_block - info->extent_tree_prealloc[total_needed - 1] >=
- leaf_range(root)) {
- total_found = 0;
- info->extent_tree_prealloc_nr = total_found;
- }
- while(test_block < ins->objectid + ins->offset &&
- total_found < total_needed) {
- nr = total_needed - total_found - 1;
- BUG_ON(nr < 0);
- info->extent_tree_prealloc[nr] = test_block;
- total_found++;
- test_block++;
- }
- if (total_found < total_needed) {
- search_start = test_block;
- goto new_group;
- }
- info->extent_tree_prealloc_nr = total_found;
- }
if (!data) {
block_group = btrfs_lookup_block_group(info, ins->objectid);
- if (block_group) {
- if (fill_prealloc)
- block_group->last_prealloc =
- info->extent_tree_prealloc[total_needed-1];
- else
- trans->block_group = block_group;
- }
+ if (block_group)
+ trans->block_group = block_group;
}
ins->offset = num_blocks;
btrfs_free_path(path);
int pending_ret;
u64 super_blocks_used;
u64 search_start = 0;
- u64 exclude_start = 0;
- u64 exclude_nr = 0;
struct btrfs_fs_info *info = root->fs_info;
struct btrfs_root *extent_root = info->extent_root;
struct btrfs_extent_item extent_item;
- struct btrfs_key prealloc_key;
btrfs_set_extent_refs(&extent_item, 1);
btrfs_set_extent_owner(&extent_item, owner);
- if (root == extent_root) {
- int nr;
- BUG_ON(info->extent_tree_prealloc_nr == 0);
- BUG_ON(num_blocks != 1);
- ins->offset = 1;
- info->extent_tree_prealloc_nr--;
- nr = info->extent_tree_prealloc_nr;
- ins->objectid = info->extent_tree_prealloc[nr];
- info->extent_tree_insert[info->extent_tree_insert_nr++] =
- ins->objectid;
- ret = update_block_group(trans, root,
- ins->objectid, ins->offset, 1, 0, 0);
- WARN_ON(info->extent_tree_insert_nr >
- ARRAY_SIZE(info->extent_tree_insert));
- BUG_ON(ret);
- return 0;
- }
-
- /*
- * if we're doing a data allocation, preallocate room in the
- * extent tree first. This way the extent tree blocks end up
- * in the correct block group.
- */
- if (data) {
- ret = find_free_extent(trans, root, 0, 0, 0,
- search_end, 0, &prealloc_key, 0, 0, 0);
- BUG_ON(ret);
- if (ret)
- return ret;
- exclude_nr = info->extent_tree_prealloc_nr;
- exclude_start = info->extent_tree_prealloc[exclude_nr - 1];
- }
-
- /* do the real allocation */
+ WARN_ON(num_blocks < 1);
ret = find_free_extent(trans, root, num_blocks, empty_size,
search_start, search_end, hint_block, ins,
- exclude_start, exclude_nr, data);
+ trans->alloc_exclude_start,
+ trans->alloc_exclude_nr, data);
BUG_ON(ret);
if (ret)
return ret;
- /*
- * if we're doing a metadata allocation, preallocate space in the
- * extent tree second. This way, we don't create a tiny hole
- * in the allocation map between any unused preallocation blocks
- * and the metadata block we're actually allocating. On disk,
- * it'll go:
- * [block we've allocated], [used prealloc 1], [ unused prealloc ]
- * The unused prealloc will get reused the next time around.
- */
- if (!data) {
- exclude_start = ins->objectid;
- exclude_nr = ins->offset;
- hint_block = exclude_start + exclude_nr;
- ret = find_free_extent(trans, root, 0, 0, search_start,
- search_end, hint_block,
- &prealloc_key, exclude_start,
- exclude_nr, 0);
- BUG_ON(ret);
- if (ret)
- return ret;
- }
-
super_blocks_used = btrfs_super_blocks_used(&info->super_copy);
btrfs_set_super_blocks_used(&info->super_copy, super_blocks_used +
num_blocks);
+
+ if (root == extent_root) {
+ BUG_ON(num_blocks != 1);
+ set_radix_bit(&root->fs_info->extent_ins_radix, ins->objectid);
+ goto update_block;
+ }
+
+ WARN_ON(trans->alloc_exclude_nr);
+ trans->alloc_exclude_start = ins->objectid;
+ trans->alloc_exclude_nr = ins->offset;
ret = btrfs_insert_item(trans, extent_root, ins, &extent_item,
sizeof(extent_item));
+ trans->alloc_exclude_start = 0;
+ trans->alloc_exclude_nr = 0;
+
BUG_ON(ret);
finish_current_insert(trans, extent_root);
pending_ret = del_pending_extents(trans, extent_root);
if (pending_ret) {
return pending_ret;
}
+
+update_block:
ret = update_block_group(trans, root, ins->objectid, ins->offset, 1, 0,
data);
BUG_ON(ret);
memcpy(&cache->key, &found_key, sizeof(found_key));
cache->last_alloc = cache->key.objectid;
cache->first_free = cache->key.objectid;
- cache->last_prealloc = cache->key.objectid;
cache->pinned = 0;
cache->cached = 0;
projects / openwrt / staging / blogic.git / commitdiff