[PATCH] security, fs, nfs, net: update security_inode_listsecurity() interface

[Casey Schaufler]

On 4/28/2025 9:23 AM, Stephen Smalley wrote:
> On Mon, Apr 28, 2025 at 12:17 PM Casey Schaufler <casey at schaufler-ca.com> wrote:
>> On 4/28/2025 8:55 AM, Stephen Smalley wrote:
>>> Update the security_inode_listsecurity() interface to allow
>>> use of the xattr_list_one() helper and update the hook
>>> implementations.
>>>
>>> Link: https://lore.kernel.org/selinux/20250424152822.2719-1-stephen.smalley.work@gmail.com/
>>>
>>> Signed-off-by: Stephen Smalley <stephen.smalley.work at gmail.com>
>>> ---
>>> This patch is relative to the one linked above, which in theory is on
>>> vfs.fixes but doesn't appear to have been pushed when I looked.
>>> diff --git a/include/linux/lsm_hook_defs.h b/include/linux/lsm_hook_defs.h
>>> index bf3bbac4e02a..3c3919dcdebc 100644
>>> --- a/include/linux/lsm_hook_defs.h
>>> +++ b/include/linux/lsm_hook_defs.h
>>> @@ -174,8 +174,8 @@ LSM_HOOK(int, -EOPNOTSUPP, inode_getsecurity, struct mnt_idmap *idmap,
>>>        struct inode *inode, const char *name, void **buffer, bool alloc)
>>>  LSM_HOOK(int, -EOPNOTSUPP, inode_setsecurity, struct inode *inode,
>>>        const char *name, const void *value, size_t size, int flags)
>>> -LSM_HOOK(int, 0, inode_listsecurity, struct inode *inode, char *buffer,
>>> -      size_t buffer_size)
>>> +LSM_HOOK(int, 0, inode_listsecurity, struct inode *inode, char **buffer,
>>> +      ssize_t *remaining_size)
>> How about "rem", "rsize" or some other name instead of the overly long
>> "remaining_size_"?
> I don't especially care either way but was just being consistent with
> the xattr_list_one() code.

Sigh. Then I'd leave it as is.