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btrfs: convert count_max_extents() to use fs_info->max_extent_size 

If count_max_extents() uses BTRFS_MAX_EXTENT_SIZE to calculate the number
of extents needed, btrfs release the metadata reservation too much on its
way to write out the data.

Now that BTRFS_MAX_EXTENT_SIZE is replaced with fs_info->max_extent_size,
convert count_max_extents() to use it instead, and fix the calculation of
the metadata reservation.

CC: stable@vger.kernel.org # 5.12+
Fixes: d8e3fb106f ("btrfs: zoned: use ZONE_APPEND write for zoned mode")
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Naohiro Aota 2022-07-09 08:18:41 +09:00 committed by David Sterba
parent f7b12a62f0
commit 7d7672bc5d
3 changed files with 24 additions and 19 deletions
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21
fs/btrfs/ctree.h
View File

@ -107,14 +107,6 @@ struct btrfs_ioctl_encoded_io_args;
#define BTRFS_STAT_CURR 0
#define BTRFS_STAT_PREV 1
/*
* Count how many BTRFS_MAX_EXTENT_SIZE cover the @size
*/
static inline u32 count_max_extents(u64 size)
{
return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE);
}
static inline unsigned long btrfs_chunk_item_size(int num_stripes)
{
BUG_ON(num_stripes == 0);
@ -4058,6 +4050,19 @@ static inline bool btrfs_is_zoned(const struct btrfs_fs_info *fs_info)
return fs_info->zone_size > 0;
}
/*
* Count how many fs_info->max_extent_size cover the @size
*/
static inline u32 count_max_extents(struct btrfs_fs_info *fs_info, u64 size)
{
#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
if (!fs_info)
return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE);
#endif
return div_u64(size + fs_info->max_extent_size - 1, fs_info->max_extent_size);
}
static inline bool btrfs_is_data_reloc_root(const struct btrfs_root *root)
{
return root->root_key.objectid == BTRFS_DATA_RELOC_TREE_OBJECTID;

6
fs/btrfs/delalloc-space.c
View File

@ -273,7 +273,7 @@ static void calc_inode_reservations(struct btrfs_fs_info *fs_info,
u64 num_bytes, u64 disk_num_bytes,
u64 *meta_reserve, u64 *qgroup_reserve)
{
u64 nr_extents = count_max_extents(num_bytes);
u64 nr_extents = count_max_extents(fs_info, num_bytes);
u64 csum_leaves = btrfs_csum_bytes_to_leaves(fs_info, disk_num_bytes);
u64 inode_update = btrfs_calc_metadata_size(fs_info, 1);
@ -350,7 +350,7 @@ int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes,
* needs to free the reservation we just made.
*/
spin_lock(&inode->lock);
nr_extents = count_max_extents(num_bytes);
nr_extents = count_max_extents(fs_info, num_bytes);
btrfs_mod_outstanding_extents(inode, nr_extents);
inode->csum_bytes += disk_num_bytes;
btrfs_calculate_inode_block_rsv_size(fs_info, inode);
@ -413,7 +413,7 @@ void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes)
unsigned num_extents;
spin_lock(&inode->lock);
num_extents = count_max_extents(num_bytes);
num_extents = count_max_extents(fs_info, num_bytes);
btrfs_mod_outstanding_extents(inode, -num_extents);
btrfs_calculate_inode_block_rsv_size(fs_info, inode);
spin_unlock(&inode->lock);

16
fs/btrfs/inode.c
View File

@ -2218,10 +2218,10 @@ void btrfs_split_delalloc_extent(struct inode *inode,
* applies here, just in reverse.
*/
new_size = orig->end - split + 1;
num_extents = count_max_extents(new_size);
num_extents = count_max_extents(fs_info, new_size);
new_size = split - orig->start;
num_extents += count_max_extents(new_size);
if (count_max_extents(size) >= num_extents)
num_extents += count_max_extents(fs_info, new_size);
if (count_max_extents(fs_info, size) >= num_extents)
return;
}
@ -2278,10 +2278,10 @@ void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new,
* this case.
*/
old_size = other->end - other->start + 1;
num_extents = count_max_extents(old_size);
num_extents = count_max_extents(fs_info, old_size);
old_size = new->end - new->start + 1;
num_extents += count_max_extents(old_size);
if (count_max_extents(new_size) >= num_extents)
num_extents += count_max_extents(fs_info, old_size);
if (count_max_extents(fs_info, new_size) >= num_extents)
return;
spin_lock(&BTRFS_I(inode)->lock);
@ -2360,7 +2360,7 @@ void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state,
if (!(state->state & EXTENT_DELALLOC) && (bits & EXTENT_DELALLOC)) {
struct btrfs_root *root = BTRFS_I(inode)->root;
u64 len = state->end + 1 - state->start;
u32 num_extents = count_max_extents(len);
u32 num_extents = count_max_extents(fs_info, len);
bool do_list = !btrfs_is_free_space_inode(BTRFS_I(inode));
spin_lock(&BTRFS_I(inode)->lock);
@ -2402,7 +2402,7 @@ void btrfs_clear_delalloc_extent(struct inode *vfs_inode,
struct btrfs_inode *inode = BTRFS_I(vfs_inode);
struct btrfs_fs_info *fs_info = btrfs_sb(vfs_inode->i_sb);
u64 len = state->end + 1 - state->start;
u32 num_extents = count_max_extents(len);
u32 num_extents = count_max_extents(fs_info, len);
if ((state->state & EXTENT_DEFRAG) && (bits & EXTENT_DEFRAG)) {
spin_lock(&inode->lock);