diff options
Diffstat (limited to 'fs/btrfs/file-item.c')
| -rw-r--r-- | fs/btrfs/file-item.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c index 45949261c699..e2055a174c0d 100644 --- a/fs/btrfs/file-item.c +++ b/fs/btrfs/file-item.c @@ -129,6 +129,17 @@ static inline u32 max_ordered_sum_bytes(struct btrfs_fs_info *fs_info, return ncsums * fs_info->sectorsize; } +/* + * Calculate the total size needed to allocate for an ordered sum structure + * spanning @bytes in the file. + */ +static int btrfs_ordered_sum_size(struct btrfs_fs_info *fs_info, unsigned long bytes) +{ + int num_sectors = (int)DIV_ROUND_UP(bytes, fs_info->sectorsize); + + return sizeof(struct btrfs_ordered_sum) + num_sectors * fs_info->csum_size; +} + int btrfs_insert_hole_extent(struct btrfs_trans_handle *trans, struct btrfs_root *root, u64 objectid, u64 pos, u64 num_bytes) |