diff options
Diffstat (limited to 'fs/btrfs')
| -rw-r--r-- | fs/btrfs/extent-tree.c | 9 | ||||
| -rw-r--r-- | fs/btrfs/extent_map.c | 147 | ||||
| -rw-r--r-- | fs/btrfs/extent_map.h | 3 | ||||
| -rw-r--r-- | fs/btrfs/file.c | 50 | ||||
| -rw-r--r-- | fs/btrfs/inode.c | 141 | ||||
| -rw-r--r-- | fs/btrfs/super.c | 1 |
6 files changed, 216 insertions, 135 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 4049aadbeda..c31e84d4265 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -39,7 +39,6 @@ static int cache_block_group(struct btrfs_root *root, u64 i; u64 last = 0; u64 hole_size; - u64 limit; int found = 0; root = root->fs_info->extent_root; @@ -62,7 +61,6 @@ static int cache_block_group(struct btrfs_root *root, return ret; if (ret && path->slots[0] > 0) path->slots[0]--; - limit = block_group->key.objectid + block_group->key.offset; while(1) { leaf = btrfs_buffer_leaf(path->nodes[0]); slot = path->slots[0]; @@ -982,7 +980,6 @@ static int find_free_extent(struct btrfs_trans_handle *trans, struct btrfs_root struct btrfs_block_group_cache *block_group; int full_scan = 0; int wrapped = 0; - u64 limit; WARN_ON(num_blocks < 1); ins->flags = 0; @@ -1049,12 +1046,6 @@ check_failed: l = btrfs_buffer_leaf(path->nodes[0]); slot = path->slots[0]; if (slot >= btrfs_header_nritems(&l->header)) { - if (start_found) - limit = last_block + - (block_group->key.offset >> 1); - else - limit = search_start + - (block_group->key.offset >> 1); ret = btrfs_next_leaf(root, path); if (ret == 0) continue; diff --git a/fs/btrfs/extent_map.c b/fs/btrfs/extent_map.c index d378edf0964..a9c7419615b 100644 --- a/fs/btrfs/extent_map.c +++ b/fs/btrfs/extent_map.c @@ -30,9 +30,6 @@ struct tree_entry { #define EXTENT_IOBITS (EXTENT_LOCKED | EXTENT_WRITEBACK) -static LIST_HEAD(all_states); -spinlock_t state_lock = SPIN_LOCK_UNLOCKED; - void __init extent_map_init(void) { extent_map_cache = kmem_cache_create("extent_map", @@ -49,15 +46,6 @@ void __init extent_map_init(void) void __exit extent_map_exit(void) { - while(!list_empty(&all_states)) { - struct extent_state *state; - struct list_head *cur = all_states.next; - state = list_entry(cur, struct extent_state, list); - printk("found leaked state %Lu %Lu state %d in_tree %d\n", - state->start, state->end, state->state, state->in_tree); - list_del(&state->list); - kfree(state); - } if (extent_map_cache) kmem_cache_destroy(extent_map_cache); if (extent_state_cache) @@ -69,6 +57,7 @@ void extent_map_tree_init(struct extent_map_tree *tree, { tree->map.rb_node = NULL; tree->state.rb_node = NULL; + tree->fill_delalloc = NULL; rwlock_init(&tree->lock); tree->mapping = mapping; } @@ -106,9 +95,6 @@ struct extent_state *alloc_extent_state(gfp_t mask) state->in_tree = 0; atomic_set(&state->refs, 1); init_waitqueue_head(&state->wq); - spin_lock_irq(&state_lock); - list_add(&state->list, &all_states); - spin_unlock_irq(&state_lock); return state; } EXPORT_SYMBOL(alloc_extent_state); @@ -117,9 +103,6 @@ void free_extent_state(struct extent_state *state) { if (atomic_dec_and_test(&state->refs)) { WARN_ON(state->in_tree); - spin_lock_irq(&state_lock); - list_del_init(&state->list); - spin_unlock_irq(&state_lock); kmem_cache_free(extent_state_cache, state); } } @@ -369,7 +352,7 @@ static int insert_state(struct extent_map_tree *tree, if (node) { struct extent_state *found; found = rb_entry(node, struct extent_state, rb_node); -printk("found node %Lu %Lu on insert of %Lu %Lu\n", found->start, found->end, start, end); + printk("found node %Lu %Lu on insert of %Lu %Lu\n", found->start, found->end, start, end); free_extent_state(state); return -EEXIST; } @@ -408,7 +391,7 @@ static int split_state(struct extent_map_tree *tree, struct extent_state *orig, if (node) { struct extent_state *found; found = rb_entry(node, struct extent_state, rb_node); -printk("found node %Lu %Lu on insert of %Lu %Lu\n", found->start, found->end, prealloc->start, prealloc->end); + printk("found node %Lu %Lu on insert of %Lu %Lu\n", found->start, found->end, prealloc->start, prealloc->end); free_extent_state(prealloc); return -EEXIST; } @@ -792,10 +775,20 @@ int set_extent_dirty(struct extent_map_tree *tree, u64 start, u64 end, } EXPORT_SYMBOL(set_extent_dirty); +int set_extent_delalloc(struct extent_map_tree *tree, u64 start, u64 end, + gfp_t mask) +{ + return set_extent_bit(tree, start, end, + EXTENT_DELALLOC | EXTENT_DIRTY, 0, NULL, + mask); +} +EXPORT_SYMBOL(set_extent_delalloc); + int clear_extent_dirty(struct extent_map_tree *tree, u64 start, u64 end, gfp_t mask) { - return clear_extent_bit(tree, start, end, EXTENT_DIRTY, 0, 0, mask); + return clear_extent_bit(tree, start, end, + EXTENT_DIRTY | EXTENT_DELALLOC, 0, 0, mask); } EXPORT_SYMBOL(clear_extent_dirty); @@ -922,6 +915,62 @@ int set_range_writeback(struct extent_map_tree *tree, u64 start, u64 end) } EXPORT_SYMBOL(set_range_writeback); +u64 find_lock_delalloc_range(struct extent_map_tree *tree, + u64 start, u64 lock_start, u64 *end, u64 max_bytes) +{ + struct rb_node *node; + struct extent_state *state; + u64 cur_start = start; + u64 found = 0; + u64 total_bytes = 0; + + write_lock_irq(&tree->lock); + /* + * this search will find all the extents that end after + * our range starts. + */ +search_again: + node = tree_search(&tree->state, cur_start); + if (!node || IS_ERR(node)) { + goto out; + } + + while(1) { + state = rb_entry(node, struct extent_state, rb_node); + if (state->start != cur_start) { + goto out; + } + if (!(state->state & EXTENT_DELALLOC)) { + goto out; + } + if (state->start >= lock_start) { + if (state->state & EXTENT_LOCKED) { + DEFINE_WAIT(wait); + atomic_inc(&state->refs); + write_unlock_irq(&tree->lock); + schedule(); + write_lock_irq(&tree->lock); + finish_wait(&state->wq, &wait); + free_extent_state(state); + goto search_again; + } + state->state |= EXTENT_LOCKED; + } + found++; + *end = state->end; + cur_start = state->end + 1; + node = rb_next(node); + if (!node) + break; + total_bytes = state->end - state->start + 1; + if (total_bytes >= max_bytes) + break; + } +out: + write_unlock_irq(&tree->lock); + return found; +} + /* * helper function to lock both pages and extents in the tree. * pages must be locked first. @@ -1285,6 +1334,7 @@ int extent_read_full_page(struct extent_map_tree *tree, struct page *page, if (!PagePrivate(page)) { SetPagePrivate(page); set_page_private(page, 1); + WARN_ON(!page->mapping->a_ops->invalidatepage); page_cache_get(page); } @@ -1384,7 +1434,10 @@ int extent_write_full_page(struct extent_map_tree *tree, struct page *page, size_t blocksize; loff_t i_size = i_size_read(inode); unsigned long end_index = i_size >> PAGE_CACHE_SHIFT; + u64 nr_delalloc; + u64 delalloc_end; + WARN_ON(!PageLocked(page)); if (page->index > end_index) { clear_extent_dirty(tree, start, page_end, GFP_NOFS); unlock_page(page); @@ -1400,11 +1453,34 @@ int extent_write_full_page(struct extent_map_tree *tree, struct page *page, if (!PagePrivate(page)) { SetPagePrivate(page); set_page_private(page, 1); + WARN_ON(!page->mapping->a_ops->invalidatepage); page_cache_get(page); } - end = page_end; lock_extent(tree, start, page_end, GFP_NOFS); + nr_delalloc = find_lock_delalloc_range(tree, start, page_end + 1, + &delalloc_end, + 128 * 1024 * 1024); + if (nr_delalloc) { + tree->fill_delalloc(inode, start, delalloc_end); + if (delalloc_end >= page_end + 1) { + clear_extent_bit(tree, page_end + 1, delalloc_end, + EXTENT_LOCKED | EXTENT_DELALLOC, + 1, 0, GFP_NOFS); + } + clear_extent_bit(tree, start, page_end, EXTENT_DELALLOC, + 0, 0, GFP_NOFS); + if (test_range_bit(tree, start, page_end, EXTENT_DELALLOC, 0)) { + printk("found delalloc bits after clear extent_bit\n"); + } + } else if (test_range_bit(tree, start, page_end, EXTENT_DELALLOC, 0)) { + printk("found delalloc bits after find_delalloc_range returns 0\n"); + } + + end = page_end; + if (test_range_bit(tree, start, page_end, EXTENT_DELALLOC, 0)) { + printk("found delalloc bits after lock_extent\n"); + } if (last_byte <= start) { clear_extent_dirty(tree, start, page_end, GFP_NOFS); @@ -1419,7 +1495,7 @@ int extent_write_full_page(struct extent_map_tree *tree, struct page *page, clear_extent_dirty(tree, cur, page_end, GFP_NOFS); break; } - em = get_extent(inode, page, page_offset, cur, end, 1); + em = get_extent(inode, page, page_offset, cur, end, 0); if (IS_ERR(em) || !em) { SetPageError(page); break; @@ -1507,6 +1583,7 @@ int extent_commit_write(struct extent_map_tree *tree, if (!PagePrivate(page)) { SetPagePrivate(page); set_page_private(page, 1); + WARN_ON(!page->mapping->a_ops->invalidatepage); page_cache_get(page); } @@ -1543,6 +1620,7 @@ int extent_prepare_write(struct extent_map_tree *tree, if (!PagePrivate(page)) { SetPagePrivate(page); set_page_private(page, 1); + WARN_ON(!page->mapping->a_ops->invalidatepage); page_cache_get(page); } block_start = (page_start + from) & ~((u64)blocksize - 1); @@ -1628,29 +1706,28 @@ int try_release_extent_mapping(struct extent_map_tree *tree, struct page *page) u64 start = page->index << PAGE_CACHE_SHIFT; u64 end = start + PAGE_CACHE_SIZE - 1; u64 orig_start = start; + int ret = 1; while (start <= end) { em = lookup_extent_mapping(tree, start, end); if (!em || IS_ERR(em)) break; - if (test_range_bit(tree, em->start, em->end, - EXTENT_LOCKED, 0)) { + if (!test_range_bit(tree, em->start, em->end, + EXTENT_LOCKED, 0)) { + remove_extent_mapping(tree, em); + /* once for the rb tree */ free_extent_map(em); - start = em->end + 1; -printk("range still locked %Lu %Lu\n", em->start, em->end); - break; } - remove_extent_mapping(tree, em); start = em->end + 1; - /* once for the rb tree */ - free_extent_map(em); /* once for us */ free_extent_map(em); } - WARN_ON(test_range_bit(tree, orig_start, end, EXTENT_WRITEBACK, 0)); - clear_extent_bit(tree, orig_start, end, EXTENT_UPTODATE, - 1, 1, GFP_NOFS); - return 1; + if (test_range_bit(tree, orig_start, end, EXTENT_LOCKED, 0)) + ret = 0; + else + clear_extent_bit(tree, orig_start, end, EXTENT_UPTODATE, + 1, 1, GFP_NOFS); + return ret; } EXPORT_SYMBOL(try_release_extent_mapping); diff --git a/fs/btrfs/extent_map.h b/fs/btrfs/extent_map.h index 108944aab4b..e91a2e9619e 100644 --- a/fs/btrfs/extent_map.h +++ b/fs/btrfs/extent_map.h @@ -11,6 +11,7 @@ struct extent_map_tree { struct rb_root state; struct address_space *mapping; rwlock_t lock; + int (*fill_delalloc)(struct inode *inode, u64 start, u64 end); }; /* note, this must start with the same fields as fs/extent_map.c:tree_entry */ @@ -74,6 +75,8 @@ int set_extent_new(struct extent_map_tree *tree, u64 start, u64 end, gfp_t mask); int set_extent_dirty(struct extent_map_tree *tree, u64 start, u64 end, gfp_t mask); +int set_extent_delalloc(struct extent_map_tree *tree, u64 start, u64 end, + gfp_t mask); int extent_invalidatepage(struct extent_map_tree *tree, struct page *page, unsigned long offset); int extent_write_full_page(struct extent_map_tree *tree, struct page *page, diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c index 71a481894ab..d3d39e4a279 100644 --- a/fs/btrfs/file.c +++ b/fs/btrfs/file.c @@ -143,7 +143,6 @@ static int dirty_and_release_pages(struct btrfs_trans_handle *trans, struct inode *inode = file->f_path.dentry->d_inode; struct extent_map *em; struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree; - struct btrfs_key ins; u64 hint_block; u64 num_blocks; u64 start_pos; @@ -162,6 +161,7 @@ static int dirty_and_release_pages(struct btrfs_trans_handle *trans, inode->i_blkbits; end_of_last_block = start_pos + (num_blocks << inode->i_blkbits) - 1; + lock_extent(em_tree, start_pos, end_of_last_block, GFP_NOFS); mutex_lock(&root->fs_info->fs_mutex); trans = btrfs_start_transaction(root, 1); if (!trans) { @@ -179,16 +179,6 @@ static int dirty_and_release_pages(struct btrfs_trans_handle *trans, /* FIXME...EIEIO, ENOSPC and more */ - /* step one, delete the existing extents in this range */ - /* FIXME blocksize != pagesize */ - if (start_pos < inode->i_size) { - err = btrfs_drop_extents(trans, root, inode, - start_pos, (pos + write_bytes + root->blocksize -1) & - ~((u64)root->blocksize - 1), &hint_block); - if (err) - goto failed; - } - /* insert any holes we need to create */ if (inode->i_size < start_pos) { u64 last_pos_in_file; @@ -213,29 +203,28 @@ static int dirty_and_release_pages(struct btrfs_trans_handle *trans, */ if (isize >= PAGE_CACHE_SIZE || pos + write_bytes < inode->i_size || pos + write_bytes - start_pos > BTRFS_MAX_INLINE_DATA_SIZE(root)) { - err = btrfs_alloc_extent(trans, root, inode->i_ino, - num_blocks, 0, hint_block, (u64)-1, - &ins, 1); - BUG_ON(err); - err = btrfs_insert_file_extent(trans, root, inode->i_ino, - start_pos, ins.objectid, ins.offset, - ins.offset); - BUG_ON(err); - em->start = start_pos; - em->end = end_of_last_block; - em->block_start = ins.objectid << inode->i_blkbits; - em->block_end = em->block_start + - (ins.offset << inode->i_blkbits) - 1; - set_extent_dirty(em_tree, start_pos, end_of_last_block, - GFP_NOFS); - err = add_extent_mapping(em_tree, em); + u64 last_end; for (i = 0; i < num_pages; i++) { struct page *p = pages[i]; SetPageUptodate(p); - __set_page_dirty_nobuffers(p); + set_page_dirty(p); } + last_end = pages[num_pages -1]->index << PAGE_CACHE_SHIFT; + last_end += PAGE_CACHE_SIZE - 1; + set_extent_delalloc(em_tree, start_pos, end_of_last_block, + GFP_NOFS); } else { struct page *p = pages[0]; + /* step one, delete the existing extents in this range */ + /* FIXME blocksize != pagesize */ + if (start_pos < inode->i_size) { + err = btrfs_drop_extents(trans, root, inode, start_pos, + (pos + write_bytes + root->blocksize -1) & + ~((u64)root->blocksize - 1), &hint_block); + if (err) + goto failed; + } + err = insert_inline_extent(trans, root, inode, start_pos, end_pos - start_pos, p, 0); BUG_ON(err); @@ -253,6 +242,7 @@ failed: err = btrfs_end_transaction(trans, root); out_unlock: mutex_unlock(&root->fs_info->fs_mutex); + unlock_extent(em_tree, start_pos, end_of_last_block, GFP_NOFS); free_extent_map(em); return err; } @@ -531,7 +521,7 @@ static int prepare_pages(struct btrfs_root *root, u64 num_blocks; u64 start_pos; - start_pos = pos & ~((u64)PAGE_CACHE_SIZE - 1); + start_pos = pos & ~((u64)root->blocksize - 1); num_blocks = (write_bytes + pos - start_pos + root->blocksize - 1) >> inode->i_blkbits; @@ -548,8 +538,10 @@ static int prepare_pages(struct btrfs_root *root, if (!PagePrivate(pages[i])) { SetPagePrivate(pages[i]); set_page_private(pages[i], 1); + WARN_ON(!pages[i]->mapping->a_ops->invalidatepage); page_cache_get(pages[i]); } + WARN_ON(!PageLocked(pages[i])); } return 0; } diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index fd4cb65fcf1..dc181089aa7 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -70,6 +70,40 @@ static unsigned char btrfs_type_by_mode[S_IFMT >> S_SHIFT] = { [S_IFLNK >> S_SHIFT] = BTRFS_FT_SYMLINK, }; +static int run_delalloc_range(struct inode *inode, u64 start, u64 end) +{ + struct btrfs_root *root = BTRFS_I(inode)->root; + struct btrfs_trans_handle *trans; + struct btrfs_key ins; + u64 alloc_hint = 0; + u64 num_blocks; + int ret; + u64 blocksize = 1 << inode->i_blkbits; + + mutex_lock(&root->fs_info->fs_mutex); + trans = btrfs_start_transaction(root, 1); + btrfs_set_trans_block_group(trans, inode); + BUG_ON(!trans); + num_blocks = (end - start + blocksize) & ~(blocksize - 1); + ret = btrfs_drop_extents(trans, root, inode, + start, start + num_blocks, &alloc_hint); + num_blocks = num_blocks >> inode->i_blkbits; + ret = btrfs_alloc_extent(trans, root, inode->i_ino, num_blocks, 0, + alloc_hint, (u64)-1, &ins, 1); + if (ret) { + WARN_ON(1); + goto out; + } + ret = btrfs_insert_file_extent(trans, root, inode->i_ino, + start, ins.objectid, ins.offset, + ins.offset); +out: + btrfs_end_transaction(trans, root); + mutex_unlock(&root->fs_info->fs_mutex); + return ret; +} + + void btrfs_read_locked_inode(struct inode *inode) { struct btrfs_path *path; @@ -121,8 +155,7 @@ void btrfs_read_locked_inode(struct inode *inode) switch (inode->i_mode & S_IFMT) { case S_IFREG: inode->i_mapping->a_ops = &btrfs_aops; - extent_map_tree_init(&BTRFS_I(inode)->extent_tree, - inode->i_mapping, GFP_NOFS); + BTRFS_I(inode)->extent_tree.fill_delalloc = run_delalloc_range; inode->i_fop = &btrfs_file_operations; inode->i_op = &btrfs_file_inode_operations; break; @@ -450,11 +483,17 @@ static int btrfs_truncate_in_trans(struct btrfs_trans_handle *trans, BUG_ON(ret); } if (item_end < inode->i_size) { - if (found_type) { - btrfs_set_key_type(&key, found_type - 1); - continue; + if (found_type == BTRFS_DIR_ITEM_KEY) { + found_type = BTRFS_INODE_ITEM_KEY; + } else if (found_type == BTRFS_EXTENT_ITEM_KEY) { + found_type = BTRFS_CSUM_ITEM_KEY; + } else if (found_type) { + found_type--; + } else { + break; } - break; + btrfs_set_key_type(&key, found_type - 1); + continue; } if (btrfs_disk_key_offset(found_key) >= inode->i_size) del_item = 1; @@ -514,47 +553,34 @@ error: return ret; } -static int btrfs_cow_one_page(struct btrfs_trans_handle *trans, - struct inode *inode, struct page *page, +static int btrfs_cow_one_page(struct inode *inode, struct page *page, size_t zero_start) { char *kaddr; int ret = 0; - struct btrfs_root *root = BTRFS_I(inode)->root; - u64 alloc_hint = 0; + struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree; u64 page_start = page->index << PAGE_CACHE_SHIFT; - struct btrfs_key ins; + u64 page_end = page_start + PAGE_CACHE_SIZE - 1; if (!PagePrivate(page)) { SetPagePrivate(page); set_page_private(page, 1); + WARN_ON(!page->mapping->a_ops->invalidatepage); page_cache_get(page); } - btrfs_set_trans_block_group(trans, inode); - - ret = btrfs_drop_extents(trans, root, inode, - page_start, page_start + PAGE_CACHE_SIZE, - &alloc_hint); - if (ret) - goto out; - ret = btrfs_alloc_extent(trans, root, inode->i_ino, 1, 0, - alloc_hint, (u64)-1, &ins, 1); - if (ret) - goto out; - ret = btrfs_insert_file_extent(trans, root, inode->i_ino, - page_start, ins.objectid, 1, 1); - if (ret) - goto out; - SetPageChecked(page); - kaddr = kmap(page); + lock_extent(em_tree, page_start, page_end, GFP_NOFS); + set_extent_delalloc(&BTRFS_I(inode)->extent_tree, page_start, + page_end, GFP_NOFS); if (zero_start != PAGE_CACHE_SIZE) { + kaddr = kmap(page); memset(kaddr + zero_start, 0, PAGE_CACHE_SIZE - zero_start); flush_dcache_page(page); + kunmap(page); } - kunmap(page); + set_page_dirty(page); + unlock_extent(em_tree, page_start, page_end, GFP_NOFS); -out: return ret; } @@ -565,8 +591,6 @@ out: static int btrfs_truncate_page(struct address_space *mapping, loff_t from) { struct inode *inode = mapping->host; - struct btrfs_root *root = BTRFS_I(inode)->root; - struct btrfs_trans_handle *trans; unsigned blocksize = 1 << inode->i_blkbits; pgoff_t index = from >> PAGE_CACHE_SHIFT; unsigned offset = from & (PAGE_CACHE_SIZE-1); @@ -591,21 +615,7 @@ static int btrfs_truncate_page(struct address_space *mapping, loff_t from) } page_start = page->index << PAGE_CACHE_SHIFT; - mutex_lock(&root->fs_info->fs_mutex); - trans = btrfs_start_transaction(root, 1); - ret = btrfs_cow_one_page(trans, inode, page, offset); - if (!ret) { - char *kaddr = kmap(page); - ret = btrfs_csum_file_block(trans, root, inode->i_ino, - page_start, kaddr, PAGE_CACHE_SIZE); - kunmap(page); - } - set_extent_dirty(&BTRFS_I(inode)->extent_tree, - page_start, page_start + PAGE_CACHE_SIZE - 1, - GFP_NOFS); - set_page_dirty(page); - btrfs_end_transaction(trans, root); - mutex_unlock(&root->fs_info->fs_mutex); + ret = btrfs_cow_one_page(inode, page, offset); unlock_page(page); page_cache_release(page); @@ -757,6 +767,8 @@ static int btrfs_init_locked_inode(struct inode *inode, void *p) struct btrfs_iget_args *args = p; inode->i_ino = args->ino; BTRFS_I(inode)->root = args->root; + extent_map_tree_init(&BTRFS_I(inode)->extent_tree, + inode->i_mapping, GFP_NOFS); return 0; } @@ -968,7 +980,10 @@ static struct inode *btrfs_new_inode(struct btrfs_trans_handle *trans, if (!inode) return ERR_PTR(-ENOMEM); + extent_map_tree_init(&BTRFS_I(inode)->extent_tree, + inode->i_mapping, GFP_NOFS); BTRFS_I(inode)->root = root; + if (mode & S_IFDIR) owner = 0; else @@ -1128,6 +1143,7 @@ static int btrfs_create(struct inode *dir, struct dentry *dentry, inode->i_op = &btrfs_file_inode_operations; extent_map_tree_init(&BTRFS_I(inode)->extent_tree, inode->i_mapping, GFP_NOFS); + BTRFS_I(inode)->extent_tree.fill_delalloc = run_delalloc_range; } dir->i_sb->s_dirt = 1; btrfs_update_inode_block_group(trans, inode); @@ -1344,9 +1360,11 @@ again: extent_end = extent_start + (btrfs_file_extent_num_blocks(item) << inode->i_blkbits); err = 0; - if (start < extent_start || start > extent_end) { + if (start < extent_start || start >= extent_end) { em->start = start; if (start < extent_start) { + if (end < extent_start) + goto not_found; em->end = extent_end - 1; } else { em->end = end; @@ -1375,9 +1393,11 @@ again: size = btrfs_file_extent_inline_len(leaf->items + path->slots[0]); extent_end = extent_start + size; - if (start < extent_start || start > extent_end) { + if (start < extent_start || start >= extent_end) { em->start = start; if (start < extent_start) { + if (end < extent_start) + goto not_found; em->end = extent_end - 1; } else { em->end = end; @@ -1412,8 +1432,7 @@ not_found_em: insert: btrfs_release_path(root, path); if (em->start > start || em->end < start) { - printk("bad extent! %Lu %Lu start %Lu end %Lu\n", em->start, em->end, start, end); - WARN_ON(1); + printk("bad extent! em: [%Lu %Lu] passed [%Lu %Lu]\n", em->start, em->end, start, end); err = -EIO; goto out; } @@ -1648,6 +1667,13 @@ int btrfs_readpage(struct file *file, struct page *page) static int btrfs_writepage(struct page *page, struct writeback_control *wbc) { struct extent_map_tree *tree; + + + if (current->flags & PF_MEMALLOC) { + redirty_page_for_writepage(wbc, page); + unlock_page(page); + return 0; + } tree = &BTRFS_I(page->mapping->host)->extent_tree; return extent_write_full_page(tree, page, btrfs_get_extent, wbc); } @@ -1698,8 +1724,6 @@ static void btrfs_invalidatepage(struct page *page, unsigned long offset) int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page) { struct inode *inode = vma->vm_file->f_path.dentry->d_inode; - struct btrfs_root *root = BTRFS_I(inode)->root; - struct btrfs_trans_handle *trans; unsigned long end; loff_t size; int ret = -EINVAL; @@ -1722,15 +1746,7 @@ int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page) else end = PAGE_CACHE_SIZE; - mutex_lock(&root->fs_info->fs_mutex); - trans = btrfs_start_transaction(root, 1); - ret = btrfs_cow_one_page(trans, inode, page, end); - btrfs_end_transaction(trans, root); - mutex_unlock(&root->fs_info->fs_mutex); - set_extent_dirty(&BTRFS_I(inode)->extent_tree, - page_start, page_start + PAGE_CACHE_SIZE - 1, - GFP_NOFS); - set_page_dirty(page); + ret = btrfs_cow_one_page(inode, page, end); out_unlock: unlock_page(page); @@ -2264,6 +2280,7 @@ static int btrfs_symlink(struct inode *dir, struct dentry *dentry, inode->i_op = &btrfs_file_inode_operations; extent_map_tree_init(&BTRFS_I(inode)->extent_tree, inode->i_mapping, GFP_NOFS); + BTRFS_I(inode)->extent_tree.fill_delalloc = run_delalloc_range; } dir->i_sb->s_dirt = 1; btrfs_update_inode_block_group(trans, inode); diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index 7b7c32c73a2..7da95538745 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -83,6 +83,7 @@ static int btrfs_fill_super(struct super_block * sb, void * data, int silent) bi->location.offset = 0; bi->location.flags = 0; bi->root = tree_root; + btrfs_set_key_type(&bi->location, BTRFS_INODE_ITEM_KEY); if (!inode) { |