diff options
Diffstat (limited to 'fs/btrfs/ioctl.c')
| -rw-r--r-- | fs/btrfs/ioctl.c | 24 |
1 files changed, 18 insertions, 6 deletions
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index ec0f380f85a1..a247991856a0 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -3128,11 +3128,14 @@ again: return ret; } +#define BTRFS_MAX_DEDUPE_LEN SZ_16M + static int btrfs_extent_same(struct inode *src, u64 loff, u64 olen, struct inode *dst, u64 dst_loff) { int ret; bool same_inode = (src == dst); + u64 i, tail_len, chunk_count; if (olen == 0) return 0; @@ -3149,7 +3152,21 @@ static int btrfs_extent_same(struct inode *src, u64 loff, u64 olen, goto out_unlock; } - ret = btrfs_extent_same_range(src, loff, olen, dst, dst_loff); + tail_len = olen % BTRFS_MAX_DEDUPE_LEN; + chunk_count = div_u64(olen, BTRFS_MAX_DEDUPE_LEN); + + for (i = 0; i < chunk_count; i++) { + ret = btrfs_extent_same_range(src, loff, BTRFS_MAX_DEDUPE_LEN, + dst, dst_loff); + if (ret) + goto out_unlock; + + loff += BTRFS_MAX_DEDUPE_LEN; + dst_loff += BTRFS_MAX_DEDUPE_LEN; + } + + if (tail_len > 0) + ret = btrfs_extent_same_range(src, loff, tail_len, dst, dst_loff); out_unlock: if (same_inode) @@ -3160,8 +3177,6 @@ out_unlock: return ret; } -#define BTRFS_MAX_DEDUPE_LEN SZ_16M - ssize_t btrfs_dedupe_file_range(struct file *src_file, u64 loff, u64 olen, struct file *dst_file, u64 dst_loff) { @@ -3170,9 +3185,6 @@ ssize_t btrfs_dedupe_file_range(struct file *src_file, u64 loff, u64 olen, u64 bs = BTRFS_I(src)->root->fs_info->sb->s_blocksize; ssize_t res; - if (olen > BTRFS_MAX_DEDUPE_LEN) - olen = BTRFS_MAX_DEDUPE_LEN; - if (WARN_ON_ONCE(bs < PAGE_SIZE)) { /* * Btrfs does not support blocksize < page_size. As a |