Commit c576e0fc authored by Matthew Bobrowski's avatar Matthew Bobrowski Committed by Jan Kara
Browse files

kernel/pid.c: remove static qualifier from pidfd_create() 

With the idea of returning pidfds from the fanotify API, we need to
expose a mechanism for creating pidfds. We drop the static qualifier
from pidfd_create() and add its declaration to linux/pid.h so that the
pidfd_create() helper can be called from other kernel subsystems
i.e. fanotify.

Link: https://lore.kernel.org/r/0c68653ec32f1b7143301f0231f7ed14062fd82b.1628398044.git.repnop@google.com


Signed-off-by: default avatarMatthew Bobrowski <repnop@google.com>
Acked-by: default avatarChristian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: default avatarJan Kara <jack@suse.cz>
parent 902e7f37

include/linux/pid.h

+1 −0
Original line number Diff line number Diff line
@@ -78,6 +78,7 @@ struct file; 


extern struct pid *pidfd_pid(const struct file *file);

struct pid *pidfd_get_pid(unsigned int fd, unsigned int *flags);

int pidfd_create(struct pid *pid, unsigned int flags);



static inline struct pid *get_pid(struct pid *pid)

{

kernel/pid.c

+3 −1
Original line number Diff line number Diff line
@@ -550,10 +550,12 @@ struct pid *pidfd_get_pid(unsigned int fd, unsigned int *flags) 
 * Note, that this function can only be called after the fd table has

 * been unshared to avoid leaking the pidfd to the new process.

 *

 * This symbol should not be explicitly exported to loadable modules.

 *

 * Return: On success, a cloexec pidfd is returned.

 *         On error, a negative errno number will be returned.

 */

static int pidfd_create(struct pid *pid, unsigned int flags)

int pidfd_create(struct pid *pid, unsigned int flags)

{

	int fd;