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btrfs: remove the cross file system checks from remap 

The sb check is already done in do_clone_file_range, and the mnt check
(which will hopefully go away in a subsequent patch) is done in
ioctl_file_clone().  Remove the check in our code and put an ASSERT() to
make sure it doesn't change underneath us.

Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Josef Bacik 2022-02-18 09:38:13 -05:00 committed by David Sterba
parent 7eefae6bb1
commit ae460f058e
1 changed files with 1 additions and 3 deletions
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4
fs/btrfs/reflink.c
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@ -781,9 +781,7 @@ static int btrfs_remap_file_range_prep(struct file *file_in, loff_t pos_in,
if (btrfs_root_readonly(root_out))
return -EROFS;
if (file_in->f_path.mnt != file_out->f_path.mnt ||
inode_in->i_sb != inode_out->i_sb)
return -EXDEV;
ASSERT(inode_in->i_sb == inode_out->i_sb);
}
/* Don't make the dst file partly checksummed */