if (btrfs_header_nritems(right) == 0) {
clean_tree_block(trans, root, right);
btrfs_tree_unlock(right);
- wret = del_ptr(trans, root, path, level + 1, pslot +
- 1);
- if (wret)
- ret = wret;
+ del_ptr(trans, root, path, level + 1, pslot + 1);
root_sub_used(root, right->len);
btrfs_free_tree_block(trans, root, right, 0, 1, 0);
- free_extent_buffer(right);
+ free_extent_buffer_stale(right);
right = NULL;
} else {
struct btrfs_disk_key right_key;
if (btrfs_header_nritems(mid) == 0) {
clean_tree_block(trans, root, mid);
btrfs_tree_unlock(mid);
- wret = del_ptr(trans, root, path, level + 1, pslot);
- if (wret)
- ret = wret;
+ del_ptr(trans, root, path, level + 1, pslot);
root_sub_used(root, mid->len);
btrfs_free_tree_block(trans, root, mid, 0, 1, 0);
- free_extent_buffer(mid);
+ free_extent_buffer_stale(mid);
mid = NULL;
} else {
/* update the parent key to reflect our changes */
u32 old_left_nritems;
u32 nr;
int ret = 0;
- int wret;
u32 this_item_size;
u32 old_left_item_size;
+ struct btrfs_map_token token;
+
+ btrfs_init_map_token(&token);
if (empty)
nr = min(right_nritems, max_slot);
int data_copy_size;
int rt_data_off;
int i;
- int ret = 0;
- int wret;
struct btrfs_disk_key disk_key;
+ struct btrfs_map_token token;
+
+ btrfs_init_map_token(&token);
nritems = nritems - mid;
btrfs_set_header_nritems(right, nritems);
u32 nritems;
unsigned int data_end;
struct btrfs_disk_key disk_key;
- int ret;
struct extent_buffer *leaf;
int slot;
+ struct btrfs_map_token token;
+
+ btrfs_init_map_token(&token);
leaf = path->nodes[0];
slot = path->slots[0];
root_sub_used(root, leaf->len);
+ extent_buffer_get(leaf);
btrfs_free_tree_block(trans, root, leaf, 0, 1, 0);
+ free_extent_buffer_stale(leaf);
- return 0;
}
/*
* delete the item at the leaf level in path. If that empties
return 0;
lock_extent_bits(io_tree, eb->start, eb->start + eb->len - 1,
- 0, &cached_state, GFP_NOFS);
+ 0, &cached_state);
- if (extent_buffer_uptodate(io_tree, eb, cached_state) &&
+ if (extent_buffer_uptodate(eb) &&
btrfs_header_generation(eb) == parent_transid) {
ret = 0;
goto out;
tree = &BTRFS_I(page->mapping->host)->io_tree;
- if (page->private == EXTENT_PAGE_PRIVATE) {
- WARN_ON(1);
- goto out;
- }
- if (!page->private) {
- WARN_ON(1);
- goto out;
- }
- len = page->private >> 2;
- WARN_ON(len == 0);
-
- eb = alloc_extent_buffer(tree, start, len, page);
- if (eb == NULL) {
- WARN_ON(1);
- ret = -ENOMEM;
- goto out;
- }
- ret = btree_read_extent_buffer_pages(root, eb, start + PAGE_CACHE_SIZE,
- btrfs_header_generation(eb));
- if (ret) {
- btrfs_printk(root->fs_info, KERN_WARNING
- "Failed to checksum dirty buffer @ %llu[%lu]\n",
- start, len);
- goto err;
- }
- WARN_ON(!btrfs_header_flag(eb, BTRFS_HEADER_FLAG_WRITTEN));
-
- ret = -EIO;
+ eb = (struct extent_buffer *)page->private;
+ if (page != eb->pages[0])
+ return 0;
-
found_start = btrfs_header_bytenr(eb);
if (found_start != start) {
WARN_ON(1);
* called for a read, do the setup so that checksum validation
* can happen in the async kernel threads
*/
+ ret = btrfs_bio_wq_end_io(BTRFS_I(inode)->root->fs_info,
+ bio, 1);
- BUG_ON(ret);
++ if (ret)
++ return ret;
return btrfs_map_bio(BTRFS_I(inode)->root, rw, bio,
mirror_num, 0);
}
}
- int clean_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root,
- struct extent_buffer *buf)
+ void clean_tree_block(struct btrfs_trans_handle *trans, struct btrfs_root *root,
+ struct extent_buffer *buf)
{
- struct inode *btree_inode = root->fs_info->btree_inode;
if (btrfs_header_generation(buf) ==
root->fs_info->running_transaction->transid) {
btrfs_assert_tree_locked(buf);
/* ugh, clear_extent_buffer_dirty needs to lock the page */
btrfs_set_lock_blocking(buf);
- clear_extent_buffer_dirty(&BTRFS_I(btree_inode)->io_tree,
- buf);
+ clear_extent_buffer_dirty(buf);
}
- return 0;
}
- static int __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize,
- u32 stripesize, struct btrfs_root *root,
- struct btrfs_fs_info *fs_info,
- u64 objectid)
+ static void __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize,
+ u32 stripesize, struct btrfs_root *root,
+ struct btrfs_fs_info *fs_info,
+ u64 objectid)
{
root->node = NULL;
root->commit_root = NULL;
if (is_data) {
ret = btrfs_del_csums(trans, root, bytenr, num_bytes);
- BUG_ON(ret);
+ if (ret)
+ goto abort;
- } else {
- invalidate_mapping_pages(info->btree_inode->i_mapping,
- bytenr >> PAGE_CACHE_SHIFT,
- (bytenr + num_bytes - 1) >> PAGE_CACHE_SHIFT);
}
ret = update_block_group(trans, root, bytenr, num_bytes, 0);
have_block_group:
cached = block_group_cache_done(block_group);
if (unlikely(!cached)) {
- u64 free_percent;
-
found_uncached_bg = true;
ret = cache_block_group(block_group, trans,
- orig_root, 1);
- BUG_ON(ret < 0); /* -ENOMEM */
- if (block_group->cached == BTRFS_CACHE_FINISHED)
- goto alloc;
-
- free_percent = btrfs_block_group_used(&block_group->item);
- free_percent *= 100;
- free_percent = div64_u64(free_percent,
- block_group->key.offset);
- free_percent = 100 - free_percent;
- if (free_percent > ideal_cache_percent &&
- likely(!block_group->ro)) {
- ideal_cache_offset = block_group->key.objectid;
- ideal_cache_percent = free_percent;
- }
-
- /*
- * The caching workers are limited to 2 threads, so we
- * can queue as much work as we care to.
- */
- if (loop > LOOP_FIND_IDEAL) {
- ret = cache_block_group(block_group, trans,
- orig_root, 0);
- BUG_ON(ret); /* -ENOMEM */
- }
-
- /*
- * If loop is set for cached only, try the next block
- * group.
- */
- if (loop == LOOP_FIND_IDEAL)
- goto loop;
+ orig_root, 0);
- BUG_ON(ret);
++ BUG_ON(ret < 0);
++ ret = 0;
}
-alloc:
if (unlikely(block_group->ro))
goto loop;
unsigned int sync_io:1;
};
+static noinline void flush_write_bio(void *data);
+ static inline struct btrfs_fs_info *
+ tree_fs_info(struct extent_io_tree *tree)
+ {
+ return btrfs_sb(tree->mapping->host->i_sb);
+ }
int __init extent_io_init(void)
{
if (!eb)
return;
- if (!atomic_dec_and_test(&eb->refs))
+ spin_lock(&eb->refs_lock);
+ if (atomic_read(&eb->refs) == 2 &&
+ test_bit(EXTENT_BUFFER_STALE, &eb->bflags) &&
+ !extent_buffer_under_io(eb) &&
+ test_and_clear_bit(EXTENT_BUFFER_TREE_REF, &eb->bflags))
+ atomic_dec(&eb->refs);
+
+ /*
+ * I know this is terrible, but it's temporary until we stop tracking
+ * the uptodate bits and such for the extent buffers.
+ */
+ release_extent_buffer(eb, GFP_ATOMIC);
+}
+
+void free_extent_buffer_stale(struct extent_buffer *eb)
+{
+ if (!eb)
return;
- WARN_ON(1);
+ spin_lock(&eb->refs_lock);
+ set_bit(EXTENT_BUFFER_STALE, &eb->bflags);
+
+ if (atomic_read(&eb->refs) == 2 && !extent_buffer_under_io(eb) &&
+ test_and_clear_bit(EXTENT_BUFFER_TREE_REF, &eb->bflags))
+ atomic_dec(&eb->refs);
+ release_extent_buffer(eb, GFP_NOFS);
}
- int clear_extent_buffer_dirty(struct extent_buffer *eb)
-void clear_extent_buffer_dirty(struct extent_io_tree *tree,
- struct extent_buffer *eb)
++void clear_extent_buffer_dirty(struct extent_buffer *eb)
{
unsigned long i;
unsigned long num_pages;
ClearPageError(page);
unlock_page(page);
}
+ WARN_ON(atomic_read(&eb->refs) == 0);
- return 0;
}
-int set_extent_buffer_dirty(struct extent_io_tree *tree,
- struct extent_buffer *eb)
+int set_extent_buffer_dirty(struct extent_buffer *eb)
{
unsigned long i;
unsigned long num_pages;
unsigned long src_offset, unsigned long len);
void memset_extent_buffer(struct extent_buffer *eb, char c,
unsigned long start, unsigned long len);
- int wait_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, int bits);
- int clear_extent_buffer_dirty(struct extent_buffer *eb);
+ void wait_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, int bits);
-void clear_extent_buffer_dirty(struct extent_io_tree *tree,
- struct extent_buffer *eb);
-int set_extent_buffer_dirty(struct extent_io_tree *tree,
- struct extent_buffer *eb);
-int set_extent_buffer_uptodate(struct extent_io_tree *tree,
- struct extent_buffer *eb);
-int clear_extent_buffer_uptodate(struct extent_io_tree *tree,
- struct extent_buffer *eb,
- struct extent_state **cached_state);
-int extent_buffer_uptodate(struct extent_io_tree *tree,
- struct extent_buffer *eb,
- struct extent_state *cached_state);
++void clear_extent_buffer_dirty(struct extent_buffer *eb);
+int set_extent_buffer_dirty(struct extent_buffer *eb);
+int set_extent_buffer_uptodate(struct extent_buffer *eb);
+int clear_extent_buffer_uptodate(struct extent_buffer *eb);
+int extent_buffer_uptodate(struct extent_buffer *eb);
int map_private_extent_buffer(struct extent_buffer *eb, unsigned long offset,
unsigned long min_len, char **map,
unsigned long *map_start,
}
lock_extent(io_tree, async_extent->start,
- async_extent->start + async_extent->ram_size - 1,
- GFP_NOFS);
+ async_extent->start + async_extent->ram_size - 1);
trans = btrfs_join_transaction(root);
- BUG_ON(IS_ERR(trans));
- trans->block_rsv = &root->fs_info->delalloc_block_rsv;
- ret = btrfs_reserve_extent(trans, root,
+ if (IS_ERR(trans)) {
+ ret = PTR_ERR(trans);
+ } else {
+ trans->block_rsv = &root->fs_info->delalloc_block_rsv;
+ ret = btrfs_reserve_extent(trans, root,
async_extent->compressed_size,
async_extent->compressed_size,
- 0, alloc_hint,
- (u64)-1, &ins, 1);
+ 0, alloc_hint, &ins, 1);
- btrfs_end_transaction(trans, root);
+ if (ret)
+ btrfs_abort_transaction(trans, root, ret);
+ btrfs_end_transaction(trans, root);
+ }
if (ret) {
int i;
cur_alloc_size = disk_num_bytes;
ret = btrfs_reserve_extent(trans, root, cur_alloc_size,
root->sectorsize, 0, alloc_hint,
- (u64)-1, &ins, 1);
+ &ins, 1);
- BUG_ON(ret);
+ if (ret < 0) {
+ btrfs_abort_transaction(trans, root, ret);
+ goto out_unlock;
+ }
em = alloc_extent_map();
- BUG_ON(!em);
+ BUG_ON(!em); /* -ENOMEM */
em->start = start;
em->orig_start = em->start;
ram_size = ins.offset;
projects / linux-flexiantxendom0-3.2.10.git / commitdiff