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Btrfs: fsx delalloc fixes 

Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason 2007-08-30 11:54:02 -04:00 committed by David Woodhouse
parent 07157aacb1
commit 2bf5a725a3
3 changed files with 38 additions and 174 deletions
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9
fs/btrfs/extent_map.c
View File

@ -77,6 +77,8 @@ EXPORT_SYMBOL(alloc_extent_map);
void free_extent_map(struct extent_map *em)
{
if (!em)
return;
if (atomic_dec_and_test(&em->refs)) {
WARN_ON(em->in_tree);
kmem_cache_free(extent_map_cache, em);
@ -102,6 +104,8 @@ EXPORT_SYMBOL(alloc_extent_state);
void free_extent_state(struct extent_state *state)
{
if (!state)
return;
if (atomic_dec_and_test(&state->refs)) {
WARN_ON(state->in_tree);
kmem_cache_free(extent_state_cache, state);
@ -1395,8 +1399,8 @@ 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);
set_page_private(page, 1);
page_cache_get(page);
}
@ -1638,7 +1642,8 @@ int extent_invalidatepage(struct extent_map_tree *tree,
lock_extent(tree, start, end, GFP_NOFS);
wait_on_extent_writeback(tree, start, end);
clear_extent_bit(tree, start, end, EXTENT_LOCKED | EXTENT_DIRTY,
clear_extent_bit(tree, start, end,
EXTENT_LOCKED | EXTENT_DIRTY | EXTENT_DELALLOC,
1, 1, GFP_NOFS);
return 0;
}

26
fs/btrfs/file.c
View File

@ -186,8 +186,16 @@ static int dirty_and_release_pages(struct btrfs_trans_handle *trans,
u64 mask = root->blocksize - 1;
last_pos_in_file = (isize + mask) & ~mask;
hole_size = (start_pos - last_pos_in_file + mask) & ~mask;
hole_size >>= inode->i_blkbits;
if (last_pos_in_file < start_pos) {
err = btrfs_drop_extents(trans, root, inode,
last_pos_in_file,
last_pos_in_file + hole_size,
&hint_block);
if (err)
goto failed;
hole_size >>= inode->i_blkbits;
err = btrfs_insert_file_extent(trans, root,
inode->i_ino,
last_pos_in_file,
@ -217,13 +225,11 @@ static int dirty_and_release_pages(struct btrfs_trans_handle *trans,
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 = 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);
@ -400,6 +406,8 @@ int btrfs_drop_extents(struct btrfs_trans_handle *trans,
keep = 1;
WARN_ON(start & (root->blocksize - 1));
if (found_extent) {
btrfs_drop_extent_cache(inode, key.offset,
start - 1 );
new_num = (start - key.offset) >>
inode->i_blkbits;
old_num = btrfs_file_extent_num_blocks(extent);
@ -464,7 +472,7 @@ int btrfs_drop_extents(struct btrfs_trans_handle *trans,
if (ret) {
btrfs_print_leaf(root, btrfs_buffer_leaf(path->nodes[0]));
printk("got %d on inserting %Lu %u %Lu start %Lu end %Lu found %Lu %Lu\n", ret , ins.objectid, ins.flags, ins.offset, start, end, key.offset, extent_end);
printk("got %d on inserting %Lu %u %Lu start %Lu end %Lu found %Lu %Lu keep was %d\n", ret , ins.objectid, ins.flags, ins.offset, start, end, key.offset, extent_end, keep);
}
BUG_ON(ret);
extent = btrfs_item_ptr(

177
fs/btrfs/inode.c
View File

@ -721,25 +721,35 @@ static int btrfs_setattr(struct dentry *dentry, struct iattr *attr)
attr->ia_valid & ATTR_SIZE && attr->ia_size > inode->i_size) {
struct btrfs_trans_handle *trans;
struct btrfs_root *root = BTRFS_I(inode)->root;
struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree;
u64 mask = root->blocksize - 1;
u64 pos = (inode->i_size + mask) & ~mask;
u64 block_end = attr->ia_size | mask;
u64 hole_size;
u64 alloc_hint;
if (attr->ia_size <= pos)
goto out;
btrfs_truncate_page(inode->i_mapping, inode->i_size);
lock_extent(em_tree, pos, block_end, GFP_NOFS);
hole_size = (attr->ia_size - pos + mask) & ~mask;
hole_size >>= inode->i_blkbits;
mutex_lock(&root->fs_info->fs_mutex);
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);
hole_size >>= inode->i_blkbits;
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);
if (err)
return err;
}
@ -1529,13 +1539,13 @@ struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
ret = add_extent_mapping(em_tree, em);
if (ret == -EEXIST) {
free_extent_map(em);
em = NULL;
failed_insert++;
if (failed_insert > 5) {
printk("failing to insert %Lu %Lu\n", start, end);
err = -EIO;
goto out;
}
em = NULL;
goto again;
}
err = 0;
@ -1555,167 +1565,6 @@ struct extent_map *btrfs_get_extent(struct inode *inode, struct page *page,
return em;
}
/*
* FIBMAP and others want to pass in a fake buffer head. They need to
* use BTRFS_GET_BLOCK_NO_DIRECT to make sure we don't try to memcpy
* any packed file data into the fake bh
*/
#define BTRFS_GET_BLOCK_NO_CREATE 0
#define BTRFS_GET_BLOCK_CREATE 1
#define BTRFS_GET_BLOCK_NO_DIRECT 2
/*
* FIXME create==1 doe not work.
*/
static int btrfs_get_block_lock(struct inode *inode, sector_t iblock,
struct buffer_head *result, int create)
{
int ret;
int err = 0;
u64 blocknr;
u64 extent_start = 0;
u64 extent_end = 0;
u64 objectid = inode->i_ino;
u32 found_type;
u64 alloc_hint = 0;
struct btrfs_path *path;
struct btrfs_root *root = BTRFS_I(inode)->root;
struct btrfs_file_extent_item *item;
struct btrfs_leaf *leaf;
struct btrfs_disk_key *found_key;
struct btrfs_trans_handle *trans = NULL;
path = btrfs_alloc_path();
BUG_ON(!path);
if (create & BTRFS_GET_BLOCK_CREATE) {
/*
* danger!, this only works if the page is properly up
* to date somehow
*/
trans = btrfs_start_transaction(root, 1);
if (!trans) {
err = -ENOMEM;
goto out;
}
ret = btrfs_drop_extents(trans, root, inode,
iblock << inode->i_blkbits,
(iblock + 1) << inode->i_blkbits,
&alloc_hint);
BUG_ON(ret);
}
ret = btrfs_lookup_file_extent(NULL, root, path,
objectid,
iblock << inode->i_blkbits, 0);
if (ret < 0) {
err = ret;
goto out;
}
if (ret != 0) {
if (path->slots[0] == 0) {
btrfs_release_path(root, path);
goto not_found;
}
path->slots[0]--;
}
item = btrfs_item_ptr(btrfs_buffer_leaf(path->nodes[0]), path->slots[0],
struct btrfs_file_extent_item);
leaf = btrfs_buffer_leaf(path->nodes[0]);
blocknr = btrfs_file_extent_disk_blocknr(item);
blocknr += btrfs_file_extent_offset(item);
/* are we inside the extent that was found? */
found_key = &leaf->items[path->slots[0]].key;
found_type = btrfs_disk_key_type(found_key);
if (btrfs_disk_key_objectid(found_key) != objectid ||
found_type != BTRFS_EXTENT_DATA_KEY) {
extent_end = 0;
extent_start = 0;
goto not_found;
}
found_type = btrfs_file_extent_type(item);
extent_start = btrfs_disk_key_offset(&leaf->items[path->slots[0]].key);
if (found_type == BTRFS_FILE_EXTENT_REG) {
extent_start = extent_start >> inode->i_blkbits;
extent_end = extent_start + btrfs_file_extent_num_blocks(item);
err = 0;
if (btrfs_file_extent_disk_blocknr(item) == 0)
goto out;
if (iblock >= extent_start && iblock < extent_end) {
btrfs_map_bh_to_logical(root, result, blocknr +
iblock - extent_start);
goto out;
}
} else if (found_type == BTRFS_FILE_EXTENT_INLINE) {
char *ptr;
char *map;
u32 size;
if (create & BTRFS_GET_BLOCK_NO_DIRECT) {
err = -EINVAL;
goto out;
}
size = btrfs_file_extent_inline_len(leaf->items +
path->slots[0]);
extent_end = (extent_start + size) >> inode->i_blkbits;
extent_start >>= inode->i_blkbits;
if (iblock < extent_start || iblock > extent_end) {
goto not_found;
}
ptr = btrfs_file_extent_inline_start(item);
map = kmap(result->b_page);
memcpy(map, ptr, size);
memset(map + size, 0, PAGE_CACHE_SIZE - size);
flush_dcache_page(result->b_page);
kunmap(result->b_page);
set_buffer_uptodate(result);
SetPageChecked(result->b_page);
btrfs_map_bh_to_logical(root, result, 0);
}
not_found:
if (create & BTRFS_GET_BLOCK_CREATE) {
struct btrfs_key ins;
ret = btrfs_alloc_extent(trans, root, inode->i_ino,
1, 0, alloc_hint, (u64)-1,
&ins, 1);
if (ret) {
err = ret;
goto out;
}
ret = btrfs_insert_file_extent(trans, root, inode->i_ino,
iblock << inode->i_blkbits,
ins.objectid, ins.offset,
ins.offset);
if (ret) {
err = ret;
goto out;
}
btrfs_map_bh_to_logical(root, result, ins.objectid);
}
out:
if (trans) {
ret = btrfs_end_transaction(trans, root);
if (!err)
err = ret;
}
btrfs_free_path(path);
return err;
}
int btrfs_get_block(struct inode *inode, sector_t iblock,
struct buffer_head *result, int create)
{
int err;
struct btrfs_root *root = BTRFS_I(inode)->root;
mutex_lock(&root->fs_info->fs_mutex);
err = btrfs_get_block_lock(inode, iblock, result, create);
mutex_unlock(&root->fs_info->fs_mutex);
return err;
}
static int btrfs_get_block_bmap(struct inode *inode, sector_t iblock,
struct buffer_head *result, int create)
{
@ -2469,6 +2318,8 @@ static struct address_space_operations btrfs_aops = {
static struct address_space_operations btrfs_symlink_aops = {
.readpage = btrfs_readpage,
.writepage = btrfs_writepage,
.invalidatepage = btrfs_invalidatepage,
.releasepage = btrfs_releasepage,
};
static struct inode_operations btrfs_file_inode_operations = {