/* first try to make some room by pushing left and right */
wret = push_leaf_left(trans, root, path, data_size);
- if (wret < 0)
+ if (wret < 0) {
return wret;
+ }
if (wret) {
wret = push_leaf_right(trans, root, path, data_size);
if (wret < 0)
/* did the pushes work? */
if (btrfs_leaf_free_space(root, l) >=
- sizeof(struct btrfs_item) + data_size)
+ sizeof(struct btrfs_item) + data_size) {
return 0;
+ }
if (!path->nodes[1]) {
ret = insert_new_root(trans, root, path, 1);
return ret;
}
mid = slot;
- double_split = 1;
+ if (mid != nritems &&
+ leaf_space_used(l, mid, nritems - mid) +
+ space_needed > BTRFS_LEAF_DATA_SIZE(root)) {
+ double_split = 1;
+ }
}
} else {
if (leaf_space_used(l, 0, mid + 1) + space_needed >
BUG_ON(path->slots[0] < 0);
- if (!double_split)
+ if (!double_split) {
return ret;
+ }
right = btrfs_alloc_free_block(trans, root, root->leafsize,
l->start, 0);
old_data = btrfs_item_end_nr(leaf, slot);
BUG_ON(slot < 0);
- BUG_ON(slot >= nritems);
+ if (slot >= nritems) {
+ btrfs_print_leaf(root, leaf);
+ printk("slot %d too large, nritems %d\n", slot, nritems);
+ BUG_ON(1);
+ }
/*
* item0..itemN ... dataN.offset..dataN.size .. data0.size
if (btrfs_leaf_free_space(root, leaf) <
sizeof(struct btrfs_item) + data_size) {
+ btrfs_print_leaf(root, leaf);
+ printk("not enough freespace need %u have %d\n",
+ data_size, btrfs_leaf_free_space(root, leaf));
BUG();
}
static int insert_inline_extent(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct inode *inode,
- u64 offset, ssize_t size,
- struct page *page, size_t page_offset)
+ u64 offset, size_t size,
+ struct page **pages, size_t page_offset,
+ int num_pages)
{
struct btrfs_key key;
struct btrfs_path *path;
char *kaddr;
unsigned long ptr;
struct btrfs_file_extent_item *ei;
+ struct page *page;
u32 datasize;
int err = 0;
int ret;
+ int i;
+ ssize_t cur_size;
path = btrfs_alloc_path();
if (!path)
key.objectid = inode->i_ino;
key.offset = offset;
btrfs_set_key_type(&key, BTRFS_EXTENT_DATA_KEY);
- BUG_ON(size >= PAGE_CACHE_SIZE);
- datasize = btrfs_file_extent_calc_inline_size(size);
+ datasize = btrfs_file_extent_calc_inline_size(offset + size);
- ret = btrfs_insert_empty_item(trans, root, path, &key,
- datasize);
- if (ret) {
+ ret = btrfs_search_slot(trans, root, &key, path, 0, 1);
+ if (ret < 0) {
err = ret;
goto fail;
}
- leaf = path->nodes[0];
- ei = btrfs_item_ptr(leaf, path->slots[0],
- struct btrfs_file_extent_item);
- btrfs_set_file_extent_generation(leaf, ei, trans->transid);
- btrfs_set_file_extent_type(leaf, ei, BTRFS_FILE_EXTENT_INLINE);
- ptr = btrfs_file_extent_inline_start(ei);
-
- kaddr = kmap_atomic(page, KM_USER1);
- write_extent_buffer(leaf, kaddr + page_offset, ptr, size);
- kunmap_atomic(kaddr, KM_USER1);
+ if (ret == 1) {
+ path->slots[0]--;
+ leaf = path->nodes[0];
+ ei = btrfs_item_ptr(leaf, path->slots[0],
+ struct btrfs_file_extent_item);
+
+ if (btrfs_file_extent_type(leaf, ei) !=
+ BTRFS_FILE_EXTENT_INLINE) {
+ goto insert;
+ }
+ btrfs_item_key_to_cpu(leaf, &key, path->slots[0]);
+ ret = 0;
+ }
+ if (ret == 0) {
+ u32 found_size;
+ u64 found_start;
+
+ leaf = path->nodes[0];
+ ei = btrfs_item_ptr(leaf, path->slots[0],
+ struct btrfs_file_extent_item);
+
+ if (btrfs_file_extent_type(leaf, ei) !=
+ BTRFS_FILE_EXTENT_INLINE) {
+ err = ret;
+ btrfs_print_leaf(root, leaf);
+ printk("found wasn't inline offset %Lu inode %lu\n",
+ offset, inode->i_ino);
+ goto fail;
+ }
+ found_start = key.offset;
+ found_size = btrfs_file_extent_inline_len(leaf,
+ btrfs_item_nr(leaf, path->slots[0]));
+
+ if (found_size < offset + size) {
+ btrfs_release_path(root, path);
+ ret = btrfs_search_slot(trans, root, &key, path,
+ offset + size - found_size -
+ found_start, 1);
+ BUG_ON(ret != 0);
+ ret = btrfs_extend_item(trans, root, path,
+ offset + size - found_size -
+ found_start);
+ if (ret) {
+ err = ret;
+ goto fail;
+ }
+ leaf = path->nodes[0];
+ ei = btrfs_item_ptr(leaf, path->slots[0],
+ struct btrfs_file_extent_item);
+ }
+ } else {
+insert:
+ btrfs_release_path(root, path);
+ ret = btrfs_insert_empty_item(trans, root, path, &key,
+ datasize);
+ if (ret) {
+ err = ret;
+ printk("got bad ret %d\n", ret);
+ goto fail;
+ }
+ leaf = path->nodes[0];
+ ei = btrfs_item_ptr(leaf, path->slots[0],
+ struct btrfs_file_extent_item);
+ btrfs_set_file_extent_generation(leaf, ei, trans->transid);
+ btrfs_set_file_extent_type(leaf, ei, BTRFS_FILE_EXTENT_INLINE);
+ }
+ ptr = btrfs_file_extent_inline_start(ei) + offset;
+
+ cur_size = size;
+ i = 0;
+ while (size > 0) {
+ page = pages[i];
+ kaddr = kmap_atomic(page, KM_USER0);
+ cur_size = min(PAGE_CACHE_SIZE - page_offset, size);
+ write_extent_buffer(leaf, kaddr + page_offset, ptr, cur_size);
+ kunmap_atomic(kaddr, KM_USER0);
+ page_offset = 0;
+ ptr += cur_size;
+ size -= cur_size;
+ if (i >= num_pages) {
+ printk("i %d num_pages %d\n", i, num_pages);
+ }
+ i++;
+ }
btrfs_mark_buffer_dirty(leaf);
fail:
btrfs_free_path(path);
err = btrfs_drop_extents(trans, root, inode,
last_pos_in_file,
last_pos_in_file + hole_size,
+ last_pos_in_file,
&hint_byte);
if (err)
goto failed;
* either allocate an extent for the new bytes or setup the key
* to show we are doing inline data in the extent
*/
- inline_size = end_pos - start_pos;
- if (isize >= PAGE_CACHE_SIZE || pos + write_bytes < inode->i_size ||
- inline_size >= BTRFS_MAX_INLINE_DATA_SIZE(root) ||
- inline_size >= PAGE_CACHE_SIZE) {
+ inline_size = end_pos;
+ if (isize >= BTRFS_MAX_INLINE_DATA_SIZE(root) ||
+ inline_size > 16384 ||
+ inline_size >= BTRFS_MAX_INLINE_DATA_SIZE(root)) {
u64 last_end;
+
for (i = 0; i < num_pages; i++) {
struct page *p = pages[i];
SetPageUptodate(p);
set_extent_delalloc(em_tree, start_pos, end_of_last_block,
GFP_NOFS);
} else {
- struct page *p = pages[0];
+ u64 aligned_end;
/* step one, delete the existing extents in this range */
+ aligned_end = (pos + write_bytes + root->sectorsize - 1) &
+ ~((u64)root->sectorsize - 1);
err = btrfs_drop_extents(trans, root, inode, start_pos,
- (pos + write_bytes + root->sectorsize -1) &
- ~((u64)root->sectorsize - 1), &hint_byte);
+ aligned_end, end_pos, &hint_byte);
if (err)
goto failed;
-
err = insert_inline_extent(trans, root, inode, start_pos,
- end_pos - start_pos, p, 0);
+ end_pos - start_pos, pages, 0,
+ num_pages);
BUG_ON(err);
- em->start = start_pos;
- em->end = end_pos - 1;
- em->block_start = EXTENT_MAP_INLINE;
- em->block_end = EXTENT_MAP_INLINE;
- add_extent_mapping(em_tree, em);
}
if (end_pos > isize) {
i_size_write(inode, end_pos);
*/
int btrfs_drop_extents(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct inode *inode,
- u64 start, u64 end, u64 *hint_byte)
+ u64 start, u64 end, u64 inline_end, u64 *hint_byte)
{
int ret;
struct btrfs_key key;
BUG_ON(ret);
}
}
- WARN_ON(found_inline);
- bookend = 1;
+ if (!found_inline)
+ bookend = 1;
}
/* truncate existing extent */
if (start > key.offset) {
btrfs_set_file_extent_num_bytes(leaf, extent,
new_num);
btrfs_mark_buffer_dirty(leaf);
- } else {
- WARN_ON(1);
+ } else if (end > extent_end &&
+ key.offset < inline_end &&
+ inline_end < extent_end) {
+ u32 new_size;
+ new_size = btrfs_file_extent_calc_inline_size(
+ inline_end - key.offset);
+ btrfs_truncate_item(trans, root, path,
+ new_size);
}
}
/* delete the entire extent */
BUG_ON(!trans);
num_bytes = (end - start + blocksize) & ~(blocksize - 1);
ret = btrfs_drop_extents(trans, root, inode,
- start, start + num_bytes, &alloc_hint);
+ start, start + num_bytes, start, &alloc_hint);
ret = btrfs_alloc_extent(trans, root, inode->i_ino, num_bytes, 0,
alloc_hint, (u64)-1, &ins, 1);
trans = btrfs_start_transaction(root, 1);
btrfs_set_trans_block_group(trans, inode);
err = btrfs_drop_extents(trans, root, inode,
- pos, pos + hole_size, &alloc_hint);
+ pos, pos + hole_size, pos,
+ &alloc_hint);
err = btrfs_insert_file_extent(trans, root, inode->i_ino,
pos, 0, 0, hole_size);
} else if (found_type == BTRFS_FILE_EXTENT_INLINE) {
unsigned long ptr;
char *map;
- u32 size;
+ size_t size;
+ size_t extent_offset;
+ size_t copy_size;
size = btrfs_file_extent_inline_len(leaf, btrfs_item_nr(leaf,
path->slots[0]));
goto not_found_em;
}
+ extent_offset = (page->index << PAGE_CACHE_SHIFT) -
+ extent_start;
+ ptr = btrfs_file_extent_inline_start(item) + extent_offset;
+ map = kmap(page);
+ copy_size = min(PAGE_CACHE_SIZE - page_offset,
+ size - extent_offset);
+
em->block_start = EXTENT_MAP_INLINE;
em->block_end = EXTENT_MAP_INLINE;
- em->start = extent_start;
- em->end = extent_end;
+ em->start = extent_start + extent_offset;
+ em->end = (em->start + copy_size -1) |
+ ((u64)root->sectorsize -1);
if (!page) {
goto insert;
}
- ptr = btrfs_file_extent_inline_start(item);
- map = kmap(page);
- read_extent_buffer(leaf, map + page_offset, ptr, size);
+ read_extent_buffer(leaf, map + page_offset, ptr, copy_size);
/*
- memset(map + page_offset + size, 0,
- root->sectorsize - (page_offset + size));
+ memset(map + page_offset + copy_size, 0,
+ PAGE_CACHE_SIZE - copy_size - page_offset);
*/
flush_dcache_page(page);
kunmap(page);
- set_extent_uptodate(em_tree, extent_start,
- extent_end, GFP_NOFS);
+ set_extent_uptodate(em_tree, em->start, em->end, GFP_NOFS);
goto insert;
} else {
printk("unkknown found_type %d\n", found_type);
projects / linux-2.6-block.git / commitdiff