diff options
| -rw-r--r-- | fs/read_write.c | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/fs/read_write.c b/fs/read_write.c index 5bbf587f5bc1..7458fccc59e1 100644 --- a/fs/read_write.c +++ b/fs/read_write.c @@ -1777,10 +1777,9 @@ static int remap_verify_area(struct file *file, loff_t pos, loff_t len, * else. Assume that the offsets have already been checked for block * alignment. * - * For deduplication we always scale down to the previous block because we - * can't meaningfully compare post-EOF contents. - * - * For clone we only link a partial EOF block above the destination file's EOF. + * For clone we only link a partial EOF block above or at the destination file's + * EOF. For deduplication we accept a partial EOF block only if it ends at the + * destination file's EOF (can not link it into the middle of a file). * * Shorten the request if possible. */ @@ -1796,8 +1795,7 @@ static int generic_remap_check_len(struct inode *inode_in, if ((*len & blkmask) == 0) return 0; - if ((remap_flags & REMAP_FILE_DEDUP) || - pos_out + *len < i_size_read(inode_out)) + if (pos_out + *len < i_size_read(inode_out)) new_len &= ~blkmask; if (new_len == *len) |