btrfs: use may_delete_dentry() in btrfs_ioctl_snap_destroy()

Browse source

There is no longer the need to use btrfs_may_delete(), which was a copy
of the VFS private function may_delete(), since now that functionality
is exported by the VFS as a function named may_delete_dentry(). In fact
our local copy of may_delete() lacks an update that happened to that
function which is point number 7 in that function's comment:

  "7. If the victim has an unknown uid or gid we can't change the inode."

which corresponds to this code:

	/* Inode writeback is not safe when the uid or gid are invalid. */
	if (!vfsuid_valid(i_uid_into_vfsuid(idmap, inode)) ||
	    !vfsgid_valid(i_gid_into_vfsgid(idmap, inode)))
		return -EOVERFLOW;

As long as we keep a separate copy, duplicating code, we are also prone
to updates to the VFS being missed in our local copy.

So change btrfs_ioctl_snap_destroy() to use the VFS function and remove
btrfs_may_delete().

Signed-off-by: Filipe Manana <fdmanana@suse.com>
Link: https://patch.msgid.link/46b13dc5c957deb72a7f085916757a20878a8e73.1768307858.git.fdmanana@suse.com
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: Christian Brauner <brauner@kernel.org>

...

This commit is contained in:

Filipe Manana 2026-01-13 12:39:52 +00:00 • committed by Christian Brauner

parent 26aab3a485

commit 5f84a1092d

No known key found for this signature in database

GPG key ID: 91C61BC06578DCA2

1 changed files with 1 additions and 57 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

58

fs/btrfs/ioctl.c

View file