5.10-stable review patch. If anyone has any objections, please let me know.
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From: Matthew Bobrowski repnop@google.com
[ Upstream commit c576e0fcd6188d0edb50b0fb83f853433ef4819b ]
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.162839804... Signed-off-by: Matthew Bobrowski repnop@google.com Acked-by: Christian Brauner christian.brauner@ubuntu.com Signed-off-by: Jan Kara jack@suse.cz Signed-off-by: Chuck Lever chuck.lever@oracle.com Signed-off-by: Sasha Levin sashal@kernel.org --- include/linux/pid.h | 1 + kernel/pid.c | 4 +++- 2 files changed, 4 insertions(+), 1 deletion(-)
diff --git a/include/linux/pid.h b/include/linux/pid.h index fa10acb8d6a42..af308e15f174c 100644 --- a/include/linux/pid.h +++ b/include/linux/pid.h @@ -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) { diff --git a/kernel/pid.c b/kernel/pid.c index 4856818c9de1a..74f0466757cbf 100644 --- a/kernel/pid.c +++ b/kernel/pid.c @@ -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;