ret = btrfs_drop_extents(trans, root, inode,
start, start + num_bytes, start, &alloc_hint);
+ if (alloc_hint == EXTENT_MAP_INLINE)
+ goto out;
+
ret = btrfs_alloc_extent(trans, root, inode->i_ino, num_bytes, 0,
alloc_hint, (u64)-1, &ins, 1);
if (ret) {
struct btrfs_trans_handle *trans;
char *kaddr;
int ret;
- u64 page_start = page->index << PAGE_CACHE_SHIFT;
+ u64 page_start = (u64)page->index << PAGE_CACHE_SHIFT;
size_t offset = start - page_start;
mutex_lock(&root->fs_info->fs_mutex);
int btrfs_readpage_end_io_hook(struct page *page, u64 start, u64 end)
{
- size_t offset = start - (page->index << PAGE_CACHE_SHIFT);
+ size_t offset = start - ((u64)page->index << PAGE_CACHE_SHIFT);
struct inode *inode = page->mapping->host;
struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree;
char *kaddr;
u64 item_end = 0;
int found_extent;
int del_item;
+ int extent_type = -1;
btrfs_drop_extent_cache(inode, inode->i_size, (u64)-1);
path = btrfs_alloc_path();
if (found_type == BTRFS_EXTENT_DATA_KEY) {
fi = btrfs_item_ptr(leaf, path->slots[0],
struct btrfs_file_extent_item);
- if (btrfs_file_extent_type(leaf, fi) !=
- BTRFS_FILE_EXTENT_INLINE) {
+ extent_type = btrfs_file_extent_type(leaf, fi);
+ if (extent_type != BTRFS_FILE_EXTENT_INLINE) {
item_end +=
btrfs_file_extent_num_bytes(leaf, fi);
+ } else if (extent_type == BTRFS_FILE_EXTENT_INLINE) {
+ struct btrfs_item *item = btrfs_item_nr(leaf,
+ path->slots[0]);
+ item_end += btrfs_file_extent_inline_len(leaf,
+ item);
}
}
if (found_type == BTRFS_CSUM_ITEM_KEY) {
inode->i_size);
BUG_ON(ret);
}
- if (item_end < inode->i_size) {
+ if (item_end <= inode->i_size) {
if (found_type == BTRFS_DIR_ITEM_KEY) {
found_type = BTRFS_INODE_ITEM_KEY;
} else if (found_type == BTRFS_EXTENT_ITEM_KEY) {
found_extent = 0;
/* FIXME, shrink the extent if the ref count is only 1 */
- if (found_type == BTRFS_EXTENT_DATA_KEY &&
- btrfs_file_extent_type(leaf, fi) !=
- BTRFS_FILE_EXTENT_INLINE) {
+ if (found_type != BTRFS_EXTENT_DATA_KEY)
+ goto delete;
+
+ if (extent_type != BTRFS_FILE_EXTENT_INLINE) {
u64 num_dec;
extent_start = btrfs_file_extent_disk_bytenr(leaf, fi);
if (!del_item) {
inode->i_blocks -= num_dec;
}
}
+ } else if (extent_type == BTRFS_FILE_EXTENT_INLINE &&
+ !del_item) {
+ u32 newsize = inode->i_size - found_key.offset;
+ newsize = btrfs_file_extent_calc_inline_size(newsize);
+ ret = btrfs_truncate_item(trans, root, path,
+ newsize, 1);
+ BUG_ON(ret);
}
+delete:
if (del_item) {
ret = btrfs_del_item(trans, root, path);
if (ret)
char *kaddr;
int ret = 0;
struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree;
- u64 page_start = page->index << PAGE_CACHE_SHIFT;
+ u64 page_start = (u64)page->index << PAGE_CACHE_SHIFT;
u64 page_end = page_start + PAGE_CACHE_SIZE - 1;
set_page_extent_mapped(page);
goto out;
}
}
- page_start = page->index << PAGE_CACHE_SHIFT;
+ page_start = (u64)page->index << PAGE_CACHE_SHIFT;
ret = btrfs_cow_one_page(inode, page, offset);
u64 pos = (inode->i_size + mask) & ~mask;
u64 block_end = attr->ia_size | mask;
u64 hole_size;
- u64 alloc_hint;
+ u64 alloc_hint = 0;
if (attr->ia_size <= pos)
goto out;
pos, pos + hole_size, pos,
&alloc_hint);
- err = btrfs_insert_file_extent(trans, root, inode->i_ino,
- pos, 0, 0, hole_size);
+ if (alloc_hint != EXTENT_MAP_INLINE) {
+ err = btrfs_insert_file_extent(trans, root,
+ inode->i_ino,
+ pos, 0, 0, hole_size);
+ }
btrfs_end_transaction(trans, root);
mutex_unlock(&root->fs_info->fs_mutex);
unlock_extent(em_tree, pos, block_end, GFP_NOFS);
em->end = EXTENT_MAP_HOLE;
}
em->bdev = inode->i_sb->s_bdev;
- ret = btrfs_lookup_file_extent(NULL, root, path,
- objectid, start, 0);
+ ret = btrfs_lookup_file_extent(trans, root, path,
+ objectid, start, trans != NULL);
if (ret < 0) {
err = ret;
goto out;
goto out;
}
- extent_offset = (page->index << PAGE_CACHE_SHIFT) -
+ extent_offset = ((u64)page->index << PAGE_CACHE_SHIFT) -
extent_start + page_offset;
copy_size = min_t(u64, PAGE_CACHE_SIZE - page_offset,
size - extent_offset);
((u64)root->sectorsize -1);
map = kmap(page);
ptr = btrfs_file_extent_inline_start(item) + extent_offset;
- read_extent_buffer(leaf, map + page_offset, ptr, copy_size);
-
- if (em->start + copy_size <= em->end) {
- size = min_t(u64, em->end + 1 - em->start,
- PAGE_CACHE_SIZE - page_offset) - copy_size;
- memset(map + page_offset + copy_size, 0, size);
+ if (create == 0 && !PageUptodate(page)) {
+ read_extent_buffer(leaf, map + page_offset, ptr,
+ copy_size);
+ flush_dcache_page(page);
+ } else if (create && PageUptodate(page)) {
+ if (!trans) {
+ kunmap(page);
+ free_extent_map(em);
+ em = NULL;
+ btrfs_release_path(root, path);
+ trans = btrfs_start_transaction(root, 1);
+ goto again;
+ }
+ write_extent_buffer(leaf, map + page_offset, ptr,
+ copy_size);
+ btrfs_mark_buffer_dirty(leaf);
}
-
- flush_dcache_page(page);
kunmap(page);
set_extent_uptodate(em_tree, em->start, em->end, GFP_NOFS);
goto insert;
return extent_write_full_page(tree, page, btrfs_get_extent, wbc);
}
+
+static int btrfs_writepages(struct address_space *mapping,
+ struct writeback_control *wbc)
+{
+ struct extent_map_tree *tree;
+ tree = &BTRFS_I(mapping->host)->extent_tree;
+ return extent_writepages(tree, mapping, btrfs_get_extent, wbc);
+}
+
static int btrfs_releasepage(struct page *page, gfp_t unused_gfp_flags)
{
struct extent_map_tree *tree;
lock_page(page);
wait_on_page_writeback(page);
size = i_size_read(inode);
- page_start = page->index << PAGE_CACHE_SHIFT;
+ page_start = (u64)page->index << PAGE_CACHE_SHIFT;
if ((page->mapping != inode->i_mapping) ||
(page_start > size)) {
goto out_unlock;
}
}
- page_start = page->index << PAGE_CACHE_SHIFT;
+ page_start = (u64)page->index << PAGE_CACHE_SHIFT;
page_end = page_start + PAGE_CACHE_SIZE - 1;
lock_extent(em_tree, page_start, page_end, GFP_NOFS);
static struct address_space_operations btrfs_aops = {
.readpage = btrfs_readpage,
.writepage = btrfs_writepage,
+ .writepages = btrfs_writepages,
.sync_page = block_sync_page,
.prepare_write = btrfs_prepare_write,
.commit_write = btrfs_commit_write,
projects / karo-tx-linux.git / blobdiff