diff options
Diffstat (limited to 'fs/btrfs/ordered-data.c')
| -rw-r--r-- | fs/btrfs/ordered-data.c | 45 |
1 files changed, 0 insertions, 45 deletions
diff --git a/fs/btrfs/ordered-data.c b/fs/btrfs/ordered-data.c index 87bac9ecdf4c..79d366a36223 100644 --- a/fs/btrfs/ordered-data.c +++ b/fs/btrfs/ordered-data.c @@ -855,51 +855,6 @@ out: } /* - * search the ordered extents for one corresponding to 'offset' and - * try to find a checksum. This is used because we allow pages to - * be reclaimed before their checksum is actually put into the btree - */ -int btrfs_find_ordered_sum(struct btrfs_inode *inode, u64 offset, - u64 disk_bytenr, u8 *sum, int len) -{ - struct btrfs_fs_info *fs_info = inode->root->fs_info; - struct btrfs_ordered_sum *ordered_sum; - struct btrfs_ordered_extent *ordered; - struct btrfs_ordered_inode_tree *tree = &inode->ordered_tree; - unsigned long num_sectors; - unsigned long i; - u32 sectorsize = btrfs_inode_sectorsize(inode); - const u8 blocksize_bits = inode->vfs_inode.i_sb->s_blocksize_bits; - const u16 csum_size = btrfs_super_csum_size(fs_info->super_copy); - int index = 0; - - ordered = btrfs_lookup_ordered_extent(inode, offset); - if (!ordered) - return 0; - - spin_lock_irq(&tree->lock); - list_for_each_entry_reverse(ordered_sum, &ordered->list, list) { - if (disk_bytenr >= ordered_sum->bytenr && - disk_bytenr < ordered_sum->bytenr + ordered_sum->len) { - i = (disk_bytenr - ordered_sum->bytenr) >> blocksize_bits; - num_sectors = ordered_sum->len >> blocksize_bits; - num_sectors = min_t(int, len - index, num_sectors - i); - memcpy(sum + index, ordered_sum->sums + i * csum_size, - num_sectors * csum_size); - - index += (int)num_sectors * csum_size; - if (index == len) - goto out; - disk_bytenr += num_sectors * sectorsize; - } - } -out: - spin_unlock_irq(&tree->lock); - btrfs_put_ordered_extent(ordered); - return index; -} - -/* * btrfs_flush_ordered_range - Lock the passed range and ensures all pending * ordered extents in it are run to completion. * |