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btrfs: move btrfs_truncate_inode_items to inode-item.c

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This is an inode item related manipulation with a few vfs related
adjustments.  I'm going to remove the vfs related code from this helper
and simplify it a lot, but I want those changes to be easily seen via
git blame, so move this function now and then the simplification work
can be done.

Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Josef Bacik 2021-12-03 17:18:04 -05:00 committed by David Sterba
parent 26c2c4540d
commit 54f03ab1e1
4 changed files with 387 additions and 391 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
fs/btrfs/ctree.h
View File

@ -3190,10 +3190,6 @@ int btrfs_add_link(struct btrfs_trans_handle *trans,
int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry);
int btrfs_truncate_block(struct btrfs_inode *inode, loff_t from, loff_t len,
int front);
int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_inode *inode, u64 new_size,
u32 min_type, u64 *extents_found);
int btrfs_start_delalloc_snapshot(struct btrfs_root *root, bool in_reclaim_context);
int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, long nr,

372
fs/btrfs/inode-item.c
View File

@ -418,3 +418,375 @@ int btrfs_lookup_inode(struct btrfs_trans_handle *trans, struct btrfs_root
}
return ret;
}
/*
* Remove inode items from a given root.
*
* @trans: A transaction handle.
* @root: The root from which to remove items.
* @inode: The inode whose items we want to remove.
* @new_size: The new i_size for the inode. This is only applicable when
* @min_type is BTRFS_EXTENT_DATA_KEY, must be 0 otherwise.
* @min_type: The minimum key type to remove. All keys with a type
* greater than this value are removed and all keys with
* this type are removed only if their offset is >= @new_size.
* @extents_found: Output parameter that will contain the number of file
* extent items that were removed or adjusted to the new
* inode i_size. The caller is responsible for initializing
* the counter. Also, it can be NULL if the caller does not
* need this counter.
*
* Remove all keys associated with the inode from the given root that have a key
* with a type greater than or equals to @min_type. When @min_type has a value of
* BTRFS_EXTENT_DATA_KEY, only remove file extent items that have an offset value
* greater than or equals to @new_size. If a file extent item that starts before
* @new_size and ends after it is found, its length is adjusted.
*
* Returns: 0 on success, < 0 on error and NEED_TRUNCATE_BLOCK when @min_type is
* BTRFS_EXTENT_DATA_KEY and the caller must truncate the last block.
*/
int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_inode *inode,
u64 new_size, u32 min_type,
u64 *extents_found)
{
struct btrfs_fs_info *fs_info = root->fs_info;
struct btrfs_path *path;
struct extent_buffer *leaf;
struct btrfs_file_extent_item *fi;
struct btrfs_key key;
struct btrfs_key found_key;
u64 extent_start = 0;
u64 extent_num_bytes = 0;
u64 extent_offset = 0;
u64 item_end = 0;
u64 last_size = new_size;
u32 found_type = (u8)-1;
int found_extent;
int del_item;
int pending_del_nr = 0;
int pending_del_slot = 0;
int extent_type = -1;
int ret;
u64 ino = btrfs_ino(inode);
u64 bytes_deleted = 0;
bool be_nice = false;
bool should_throttle = false;
const u64 lock_start = ALIGN_DOWN(new_size, fs_info->sectorsize);
struct extent_state *cached_state = NULL;
BUG_ON(new_size > 0 && min_type != BTRFS_EXTENT_DATA_KEY);
/*
* For non-free space inodes and non-shareable roots, we want to back
* off from time to time. This means all inodes in subvolume roots,
* reloc roots, and data reloc roots.
*/
if (!btrfs_is_free_space_inode(inode) &&
test_bit(BTRFS_ROOT_SHAREABLE, &root->state))
be_nice = true;
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
path->reada = READA_BACK;
if (root->root_key.objectid != BTRFS_TREE_LOG_OBJECTID) {
lock_extent_bits(&inode->io_tree, lock_start, (u64)-1,
&cached_state);
/*
* We want to drop from the next block forward in case this
* new size is not block aligned since we will be keeping the
* last block of the extent just the way it is.
*/
btrfs_drop_extent_cache(inode, ALIGN(new_size,
fs_info->sectorsize),
(u64)-1, 0);
}
/*
* This function is also used to drop the items in the log tree before
* we relog the inode, so if root != BTRFS_I(inode)->root, it means
* it is used to drop the logged items. So we shouldn't kill the delayed
* items.
*/
if (min_type == 0 && root == inode->root)
btrfs_kill_delayed_inode_items(inode);
key.objectid = ino;
key.offset = (u64)-1;
key.type = (u8)-1;
search_again:
/*
* With a 16K leaf size and 128MiB extents, you can actually queue up a
* huge file in a single leaf. Most of the time that bytes_deleted is
* > 0, it will be huge by the time we get here
*/
if (be_nice && bytes_deleted > SZ_32M &&
btrfs_should_end_transaction(trans)) {
ret = -EAGAIN;
goto out;
}
ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
if (ret < 0)
goto out;
if (ret > 0) {
ret = 0;
/* There are no items in the tree for us to truncate, we're done */
if (path->slots[0] == 0)
goto out;
path->slots[0]--;
}
while (1) {
u64 clear_start = 0, clear_len = 0;
fi = NULL;
leaf = path->nodes[0];
btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0]);
found_type = found_key.type;
if (found_key.objectid != ino)
break;
if (found_type < min_type)
break;
item_end = found_key.offset;
if (found_type == BTRFS_EXTENT_DATA_KEY) {
fi = btrfs_item_ptr(leaf, path->slots[0],
struct btrfs_file_extent_item);
extent_type = btrfs_file_extent_type(leaf, fi);
if (extent_type != BTRFS_FILE_EXTENT_INLINE) {
item_end +=
btrfs_file_extent_num_bytes(leaf, fi);
trace_btrfs_truncate_show_fi_regular(
inode, leaf, fi, found_key.offset);
} else if (extent_type == BTRFS_FILE_EXTENT_INLINE) {
item_end += btrfs_file_extent_ram_bytes(leaf, fi);
trace_btrfs_truncate_show_fi_inline(
inode, leaf, fi, path->slots[0],
found_key.offset);
}
item_end--;
}
if (found_type > min_type) {
del_item = 1;
} else {
if (item_end < new_size)
break;
if (found_key.offset >= new_size)
del_item = 1;
else
del_item = 0;
}
found_extent = 0;
/* FIXME, shrink the extent if the ref count is only 1 */
if (found_type != BTRFS_EXTENT_DATA_KEY)
goto delete;
if (extents_found != NULL)
(*extents_found)++;
if (extent_type != BTRFS_FILE_EXTENT_INLINE) {
u64 num_dec;
clear_start = found_key.offset;
extent_start = btrfs_file_extent_disk_bytenr(leaf, fi);
if (!del_item) {
u64 orig_num_bytes =
btrfs_file_extent_num_bytes(leaf, fi);
extent_num_bytes = ALIGN(new_size -
found_key.offset,
fs_info->sectorsize);
clear_start = ALIGN(new_size, fs_info->sectorsize);
btrfs_set_file_extent_num_bytes(leaf, fi,
extent_num_bytes);
num_dec = (orig_num_bytes - extent_num_bytes);
if (test_bit(BTRFS_ROOT_SHAREABLE, &root->state) &&
extent_start != 0)
inode_sub_bytes(&inode->vfs_inode,
num_dec);
btrfs_mark_buffer_dirty(leaf);
} else {
extent_num_bytes =
btrfs_file_extent_disk_num_bytes(leaf, fi);
extent_offset = found_key.offset -
btrfs_file_extent_offset(leaf, fi);
/* FIXME blocksize != 4096 */
num_dec = btrfs_file_extent_num_bytes(leaf, fi);
if (extent_start != 0) {
found_extent = 1;
if (test_bit(BTRFS_ROOT_SHAREABLE,
&root->state))
inode_sub_bytes(&inode->vfs_inode,
num_dec);
}
}
clear_len = num_dec;
} else if (extent_type == BTRFS_FILE_EXTENT_INLINE) {
/*
* We can't truncate inline items that have had
* special encodings
*/
if (!del_item &&
btrfs_file_extent_encryption(leaf, fi) == 0 &&
btrfs_file_extent_other_encoding(leaf, fi) == 0 &&
btrfs_file_extent_compression(leaf, fi) == 0) {
u32 size = (u32)(new_size - found_key.offset);
btrfs_set_file_extent_ram_bytes(leaf, fi, size);
size = btrfs_file_extent_calc_inline_size(size);
btrfs_truncate_item(path, size, 1);
} else if (!del_item) {
/*
* We have to bail so the last_size is set to
* just before this extent.
*/
ret = BTRFS_NEED_TRUNCATE_BLOCK;
break;
} else {
/*
* Inline extents are special, we just treat
* them as a full sector worth in the file
* extent tree just for simplicity sake.
*/
clear_len = fs_info->sectorsize;
}
if (test_bit(BTRFS_ROOT_SHAREABLE, &root->state))
inode_sub_bytes(&inode->vfs_inode,
item_end + 1 - new_size);
}
delete:
/*
* We use btrfs_truncate_inode_items() to clean up log trees for
* multiple fsyncs, and in this case we don't want to clear the
* file extent range because it's just the log.
*/
if (root == inode->root) {
ret = btrfs_inode_clear_file_extent_range(inode,
clear_start, clear_len);
if (ret) {
btrfs_abort_transaction(trans, ret);
break;
}
}
if (del_item)
last_size = found_key.offset;
else
last_size = new_size;
if (del_item) {
if (!pending_del_nr) {
/* No pending yet, add ourselves */
pending_del_slot = path->slots[0];
pending_del_nr = 1;
} else if (pending_del_nr &&
path->slots[0] + 1 == pending_del_slot) {
/* Hop on the pending chunk */
pending_del_nr++;
pending_del_slot = path->slots[0];
} else {
BUG();
}
} else {
break;
}
should_throttle = false;
if (found_extent &&
root->root_key.objectid != BTRFS_TREE_LOG_OBJECTID) {
struct btrfs_ref ref = { 0 };
bytes_deleted += extent_num_bytes;
btrfs_init_generic_ref(&ref, BTRFS_DROP_DELAYED_REF,
extent_start, extent_num_bytes, 0);
btrfs_init_data_ref(&ref, btrfs_header_owner(leaf),
ino, extent_offset,
root->root_key.objectid, false);
ret = btrfs_free_extent(trans, &ref);
if (ret) {
btrfs_abort_transaction(trans, ret);
break;
}
if (be_nice) {
if (btrfs_should_throttle_delayed_refs(trans))
should_throttle = true;
}
}
if (found_type == BTRFS_INODE_ITEM_KEY)
break;
if (path->slots[0] == 0 ||
path->slots[0] != pending_del_slot ||
should_throttle) {
if (pending_del_nr) {
ret = btrfs_del_items(trans, root, path,
pending_del_slot,
pending_del_nr);
if (ret) {
btrfs_abort_transaction(trans, ret);
break;
}
pending_del_nr = 0;
}
btrfs_release_path(path);
/*
* We can generate a lot of delayed refs, so we need to
* throttle every once and a while and make sure we're
* adding enough space to keep up with the work we are
* generating. Since we hold a transaction here we
* can't flush, and we don't want to FLUSH_LIMIT because
* we could have generated too many delayed refs to
* actually allocate, so just bail if we're short and
* let the normal reservation dance happen higher up.
*/
if (should_throttle) {
ret = btrfs_delayed_refs_rsv_refill(fs_info,
BTRFS_RESERVE_NO_FLUSH);
if (ret) {
ret = -EAGAIN;
break;
}
}
goto search_again;
} else {
path->slots[0]--;
}
}
out:
if (ret >= 0 && pending_del_nr) {
int err;
err = btrfs_del_items(trans, root, path, pending_del_slot,
pending_del_nr);
if (err) {
btrfs_abort_transaction(trans, err);
ret = err;
}
}
if (root->root_key.objectid != BTRFS_TREE_LOG_OBJECTID) {
ASSERT(last_size >= new_size);
if (!ret && last_size > new_size)
last_size = new_size;
btrfs_inode_safe_disk_i_size_write(inode, last_size);
unlock_extent_cached(&inode->io_tree, lock_start, (u64)-1,
&cached_state);
}
btrfs_free_path(path);
return ret;
}

11
fs/btrfs/inode-item.h
View File

@ -10,8 +10,19 @@ struct btrfs_root;
struct btrfs_path;
struct btrfs_key;
struct btrfs_inode_extref;
struct btrfs_inode;
struct extent_buffer;
/*
* Return this if we need to call truncate_block for the last bit of the
* truncate.
*/
#define BTRFS_NEED_TRUNCATE_BLOCK 1
int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_inode *inode, u64 new_size,
u32 min_type, u64 *extents_found);
int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
const char *name, int name_len,

391
fs/btrfs/inode.c
View File

@ -4616,389 +4616,6 @@ out:
return err;
}
/*
* Return this if we need to call truncate_block for the last bit of the
* truncate.
*/
#define NEED_TRUNCATE_BLOCK 1
/*
* Remove inode items from a given root.
*
* @trans: A transaction handle.
* @root: The root from which to remove items.
* @inode: The inode whose items we want to remove.
* @new_size: The new i_size for the inode. This is only applicable when
* @min_type is BTRFS_EXTENT_DATA_KEY, must be 0 otherwise.
* @min_type: The minimum key type to remove. All keys with a type
* greater than this value are removed and all keys with
* this type are removed only if their offset is >= @new_size.
* @extents_found: Output parameter that will contain the number of file
* extent items that were removed or adjusted to the new
* inode i_size. The caller is responsible for initializing
* the counter. Also, it can be NULL if the caller does not
* need this counter.
*
* Remove all keys associated with the inode from the given root that have a key
* with a type greater than or equals to @min_type. When @min_type has a value of
* BTRFS_EXTENT_DATA_KEY, only remove file extent items that have an offset value
* greater than or equals to @new_size. If a file extent item that starts before
* @new_size and ends after it is found, its length is adjusted.
*
* Returns: 0 on success, < 0 on error and NEED_TRUNCATE_BLOCK when @min_type is
* BTRFS_EXTENT_DATA_KEY and the caller must truncate the last block.
*/
int btrfs_truncate_inode_items(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_inode *inode,
u64 new_size, u32 min_type,
u64 *extents_found)
{
struct btrfs_fs_info *fs_info = root->fs_info;
struct btrfs_path *path;
struct extent_buffer *leaf;
struct btrfs_file_extent_item *fi;
struct btrfs_key key;
struct btrfs_key found_key;
u64 extent_start = 0;
u64 extent_num_bytes = 0;
u64 extent_offset = 0;
u64 item_end = 0;
u64 last_size = new_size;
u32 found_type = (u8)-1;
int found_extent;
int del_item;
int pending_del_nr = 0;
int pending_del_slot = 0;
int extent_type = -1;
int ret;
u64 ino = btrfs_ino(inode);
u64 bytes_deleted = 0;
bool be_nice = false;
bool should_throttle = false;
const u64 lock_start = ALIGN_DOWN(new_size, fs_info->sectorsize);
struct extent_state *cached_state = NULL;
BUG_ON(new_size > 0 && min_type != BTRFS_EXTENT_DATA_KEY);
/*
* For non-free space inodes and non-shareable roots, we want to back
* off from time to time. This means all inodes in subvolume roots,
* reloc roots, and data reloc roots.
*/
if (!btrfs_is_free_space_inode(inode) &&
test_bit(BTRFS_ROOT_SHAREABLE, &root->state))
be_nice = true;
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
path->reada = READA_BACK;
if (root->root_key.objectid != BTRFS_TREE_LOG_OBJECTID) {
lock_extent_bits(&inode->io_tree, lock_start, (u64)-1,
&cached_state);
/*
* We want to drop from the next block forward in case this
* new size is not block aligned since we will be keeping the
* last block of the extent just the way it is.
*/
btrfs_drop_extent_cache(inode, ALIGN(new_size,
fs_info->sectorsize),
(u64)-1, 0);
}
/*
* This function is also used to drop the items in the log tree before
* we relog the inode, so if root != BTRFS_I(inode)->root, it means
* it is used to drop the logged items. So we shouldn't kill the delayed
* items.
*/
if (min_type == 0 && root == inode->root)
btrfs_kill_delayed_inode_items(inode);
key.objectid = ino;
key.offset = (u64)-1;
key.type = (u8)-1;
search_again:
/*
* with a 16K leaf size and 128MB extents, you can actually queue
* up a huge file in a single leaf. Most of the time that
* bytes_deleted is > 0, it will be huge by the time we get here
*/
if (be_nice && bytes_deleted > SZ_32M &&
btrfs_should_end_transaction(trans)) {
ret = -EAGAIN;
goto out;
}
ret = btrfs_search_slot(trans, root, &key, path, -1, 1);
if (ret < 0)
goto out;
if (ret > 0) {
ret = 0;
/* there are no items in the tree for us to truncate, we're
* done
*/
if (path->slots[0] == 0)
goto out;
path->slots[0]--;
}
while (1) {
u64 clear_start = 0, clear_len = 0;
fi = NULL;
leaf = path->nodes[0];
btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0]);
found_type = found_key.type;
if (found_key.objectid != ino)
break;
if (found_type < min_type)
break;
item_end = found_key.offset;
if (found_type == BTRFS_EXTENT_DATA_KEY) {
fi = btrfs_item_ptr(leaf, path->slots[0],
struct btrfs_file_extent_item);
extent_type = btrfs_file_extent_type(leaf, fi);
if (extent_type != BTRFS_FILE_EXTENT_INLINE) {
item_end +=
btrfs_file_extent_num_bytes(leaf, fi);
trace_btrfs_truncate_show_fi_regular(
inode, leaf, fi, found_key.offset);
} else if (extent_type == BTRFS_FILE_EXTENT_INLINE) {
item_end += btrfs_file_extent_ram_bytes(leaf,
fi);
trace_btrfs_truncate_show_fi_inline(
inode, leaf, fi, path->slots[0],
found_key.offset);
}
item_end--;
}
if (found_type > min_type) {
del_item = 1;
} else {
if (item_end < new_size)
break;
if (found_key.offset >= new_size)
del_item = 1;
else
del_item = 0;
}
found_extent = 0;
/* FIXME, shrink the extent if the ref count is only 1 */
if (found_type != BTRFS_EXTENT_DATA_KEY)
goto delete;
if (extents_found != NULL)
(*extents_found)++;
if (extent_type != BTRFS_FILE_EXTENT_INLINE) {
u64 num_dec;
clear_start = found_key.offset;
extent_start = btrfs_file_extent_disk_bytenr(leaf, fi);
if (!del_item) {
u64 orig_num_bytes =
btrfs_file_extent_num_bytes(leaf, fi);
extent_num_bytes = ALIGN(new_size -
found_key.offset,
fs_info->sectorsize);
clear_start = ALIGN(new_size, fs_info->sectorsize);
btrfs_set_file_extent_num_bytes(leaf, fi,
extent_num_bytes);
num_dec = (orig_num_bytes -
extent_num_bytes);
if (test_bit(BTRFS_ROOT_SHAREABLE,
&root->state) &&
extent_start != 0)
inode_sub_bytes(&inode->vfs_inode,
num_dec);
btrfs_mark_buffer_dirty(leaf);
} else {
extent_num_bytes =
btrfs_file_extent_disk_num_bytes(leaf,
fi);
extent_offset = found_key.offset -
btrfs_file_extent_offset(leaf, fi);
/* FIXME blocksize != 4096 */
num_dec = btrfs_file_extent_num_bytes(leaf, fi);
if (extent_start != 0) {
found_extent = 1;
if (test_bit(BTRFS_ROOT_SHAREABLE,
&root->state))
inode_sub_bytes(&inode->vfs_inode,
num_dec);
}
}
clear_len = num_dec;
} else if (extent_type == BTRFS_FILE_EXTENT_INLINE) {
/*
* we can't truncate inline items that have had
* special encodings
*/
if (!del_item &&
btrfs_file_extent_encryption(leaf, fi) == 0 &&
btrfs_file_extent_other_encoding(leaf, fi) == 0 &&
btrfs_file_extent_compression(leaf, fi) == 0) {
u32 size = (u32)(new_size - found_key.offset);
btrfs_set_file_extent_ram_bytes(leaf, fi, size);
size = btrfs_file_extent_calc_inline_size(size);
btrfs_truncate_item(path, size, 1);
} else if (!del_item) {
/*
* We have to bail so the last_size is set to
* just before this extent.
*/
ret = NEED_TRUNCATE_BLOCK;
break;
} else {
/*
* Inline extents are special, we just treat
* them as a full sector worth in the file
* extent tree just for simplicity sake.
*/
clear_len = fs_info->sectorsize;
}
if (test_bit(BTRFS_ROOT_SHAREABLE, &root->state))
inode_sub_bytes(&inode->vfs_inode,
item_end + 1 - new_size);
}
delete:
/*
* We use btrfs_truncate_inode_items() to clean up log trees for
* multiple fsyncs, and in this case we don't want to clear the
* file extent range because it's just the log.
*/
if (root == inode->root) {
ret = btrfs_inode_clear_file_extent_range(inode,
clear_start, clear_len);
if (ret) {
btrfs_abort_transaction(trans, ret);
break;
}
}
if (del_item)
last_size = found_key.offset;
else
last_size = new_size;
if (del_item) {
if (!pending_del_nr) {
/* no pending yet, add ourselves */
pending_del_slot = path->slots[0];
pending_del_nr = 1;
} else if (pending_del_nr &&
path->slots[0] + 1 == pending_del_slot) {
/* hop on the pending chunk */
pending_del_nr++;
pending_del_slot = path->slots[0];
} else {
BUG();
}
} else {
break;
}
should_throttle = false;
if (found_extent &&
root->root_key.objectid != BTRFS_TREE_LOG_OBJECTID) {
struct btrfs_ref ref = { 0 };
bytes_deleted += extent_num_bytes;
btrfs_init_generic_ref(&ref, BTRFS_DROP_DELAYED_REF,
extent_start, extent_num_bytes, 0);
btrfs_init_data_ref(&ref, btrfs_header_owner(leaf),
ino, extent_offset,
root->root_key.objectid, false);
ret = btrfs_free_extent(trans, &ref);
if (ret) {
btrfs_abort_transaction(trans, ret);
break;
}
if (be_nice) {
if (btrfs_should_throttle_delayed_refs(trans))
should_throttle = true;
}
}
if (found_type == BTRFS_INODE_ITEM_KEY)
break;
if (path->slots[0] == 0 ||
path->slots[0] != pending_del_slot ||
should_throttle) {
if (pending_del_nr) {
ret = btrfs_del_items(trans, root, path,
pending_del_slot,
pending_del_nr);
if (ret) {
btrfs_abort_transaction(trans, ret);
break;
}
pending_del_nr = 0;
}
btrfs_release_path(path);
/*
* We can generate a lot of delayed refs, so we need to
* throttle every once and a while and make sure we're
* adding enough space to keep up with the work we are
* generating. Since we hold a transaction here we
* can't flush, and we don't want to FLUSH_LIMIT because
* we could have generated too many delayed refs to
* actually allocate, so just bail if we're short and
* let the normal reservation dance happen higher up.
*/
if (should_throttle) {
ret = btrfs_delayed_refs_rsv_refill(fs_info,
BTRFS_RESERVE_NO_FLUSH);
if (ret) {
ret = -EAGAIN;
break;
}
}
goto search_again;
} else {
path->slots[0]--;
}
}
out:
if (ret >= 0 && pending_del_nr) {
int err;
err = btrfs_del_items(trans, root, path, pending_del_slot,
pending_del_nr);
if (err) {
btrfs_abort_transaction(trans, err);
ret = err;
}
}
if (root->root_key.objectid != BTRFS_TREE_LOG_OBJECTID) {
ASSERT(last_size >= new_size);
if (!ret && last_size > new_size)
last_size = new_size;
btrfs_inode_safe_disk_i_size_write(inode, last_size);
unlock_extent_cached(&inode->io_tree, lock_start, (u64)-1,
&cached_state);
}
btrfs_free_path(path);
return ret;
}
/*
* btrfs_truncate_block - read, zero a chunk and write a block
* @inode - inode that we're zeroing
@ -8997,11 +8614,11 @@ static int btrfs_truncate(struct inode *inode, bool skip_writeback)
/*
* We can't call btrfs_truncate_block inside a trans handle as we could
* deadlock with freeze, if we got NEED_TRUNCATE_BLOCK then we know
* we've truncated everything except the last little bit, and can do
* btrfs_truncate_block and then update the disk_i_size.
* deadlock with freeze, if we got BTRFS_NEED_TRUNCATE_BLOCK then we
* know we've truncated everything except the last little bit, and can
* do btrfs_truncate_block and then update the disk_i_size.
*/
if (ret == NEED_TRUNCATE_BLOCK) {
if (ret == BTRFS_NEED_TRUNCATE_BLOCK) {
btrfs_end_transaction(trans);
btrfs_btree_balance_dirty(fs_info);