Unverified Commit c9fa2b07 authored by Christian Brauner's avatar Christian Brauner Committed by Christian Brauner (Microsoft)
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mnt_idmapping: add vfs[g,u]id_into_k[g,u]id() 



Add two tiny helpers to conver a vfsuid into a kuid.

Signed-off-by: default avatarChristian Brauner (Microsoft) <brauner@kernel.org>
parent 45598fd4

include/linux/mnt_idmapping.h

+26 −0
Original line number Diff line number Diff line
@@ -333,6 +333,19 @@ static inline bool vfsuid_has_fsmapping(struct user_namespace *mnt_userns, 
	return uid_valid(from_vfsuid(mnt_userns, fs_userns, vfsuid));

}



/**

 * vfsuid_into_kuid - convert vfsuid into kuid

 * @vfsuid: the vfsuid to convert

 *

 * This can be used when a vfsuid is committed as a kuid.

 *

 * Return: a kuid with the value of @vfsuid

 */

static inline kuid_t vfsuid_into_kuid(vfsuid_t vfsuid)

{

	return AS_KUIDT(vfsuid);

}



/**

 * from_vfsgid - map a vfsgid into the filesystem idmapping

 * @mnt_userns: the mount's idmapping
@@ -406,6 +419,19 @@ static inline bool vfsgid_has_fsmapping(struct user_namespace *mnt_userns, 
	return gid_valid(from_vfsgid(mnt_userns, fs_userns, vfsgid));

}



/**

 * vfsgid_into_kgid - convert vfsgid into kgid

 * @vfsgid: the vfsgid to convert

 *

 * This can be used when a vfsgid is committed as a kgid.

 *

 * Return: a kgid with the value of @vfsgid

 */

static inline kgid_t vfsgid_into_kgid(vfsgid_t vfsgid)

{

	return AS_KGIDT(vfsgid);

}



/**

 * mapped_fsuid - return caller's fsuid mapped up into a mnt_userns

 * @mnt_userns: the mount's idmapping