mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
synced 2025-08-31 14:13:39 +00:00
a4c746f068
Mark the range from -10000 to -40000 as a range reserved for special in-kernel values. Move the PIDFD_SELF_*/PIDFD_THREAD_* sentinels over so all the special values are in one place. Link: https://lore.kernel.org/20250624-work-pidfs-fhandle-v2-6-d02a04858fe3@kernel.org Reviewed-by: Jan Kara <jack@suse.cz> Reviewed-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Christian Brauner <brauner@kernel.org>
113 lines
4.2 KiB
C
113 lines
4.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
|
|
|
|
#ifndef _UAPI_LINUX_PIDFD_H
|
|
#define _UAPI_LINUX_PIDFD_H
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/fcntl.h>
|
|
#include <linux/ioctl.h>
|
|
|
|
/* Flags for pidfd_open(). */
|
|
#define PIDFD_NONBLOCK O_NONBLOCK
|
|
#define PIDFD_THREAD O_EXCL
|
|
#ifdef __KERNEL__
|
|
#include <linux/sched.h>
|
|
#define PIDFD_STALE CLONE_PIDFD
|
|
#endif
|
|
|
|
/* Flags for pidfd_send_signal(). */
|
|
#define PIDFD_SIGNAL_THREAD (1UL << 0)
|
|
#define PIDFD_SIGNAL_THREAD_GROUP (1UL << 1)
|
|
#define PIDFD_SIGNAL_PROCESS_GROUP (1UL << 2)
|
|
|
|
/* Flags for pidfd_info. */
|
|
#define PIDFD_INFO_PID (1UL << 0) /* Always returned, even if not requested */
|
|
#define PIDFD_INFO_CREDS (1UL << 1) /* Always returned, even if not requested */
|
|
#define PIDFD_INFO_CGROUPID (1UL << 2) /* Always returned if available, even if not requested */
|
|
#define PIDFD_INFO_EXIT (1UL << 3) /* Only returned if requested. */
|
|
#define PIDFD_INFO_COREDUMP (1UL << 4) /* Only returned if requested. */
|
|
|
|
#define PIDFD_INFO_SIZE_VER0 64 /* sizeof first published struct */
|
|
|
|
/*
|
|
* Values for @coredump_mask in pidfd_info.
|
|
* Only valid if PIDFD_INFO_COREDUMP is set in @mask.
|
|
*
|
|
* Note, the @PIDFD_COREDUMP_ROOT flag indicates that the generated
|
|
* coredump should be treated as sensitive and access should only be
|
|
* granted to privileged users.
|
|
*/
|
|
#define PIDFD_COREDUMPED (1U << 0) /* Did crash and... */
|
|
#define PIDFD_COREDUMP_SKIP (1U << 1) /* coredumping generation was skipped. */
|
|
#define PIDFD_COREDUMP_USER (1U << 2) /* coredump was done as the user. */
|
|
#define PIDFD_COREDUMP_ROOT (1U << 3) /* coredump was done as root. */
|
|
|
|
/*
|
|
* ...and for userland we make life simpler - PIDFD_SELF refers to the current
|
|
* thread, PIDFD_SELF_PROCESS refers to the process thread group leader.
|
|
*
|
|
* For nearly all practical uses, a user will want to use PIDFD_SELF.
|
|
*/
|
|
#define PIDFD_SELF PIDFD_SELF_THREAD
|
|
#define PIDFD_SELF_PROCESS PIDFD_SELF_THREAD_GROUP
|
|
|
|
struct pidfd_info {
|
|
/*
|
|
* This mask is similar to the request_mask in statx(2).
|
|
*
|
|
* Userspace indicates what extensions or expensive-to-calculate fields
|
|
* they want by setting the corresponding bits in mask. The kernel
|
|
* will ignore bits that it does not know about.
|
|
*
|
|
* When filling the structure, the kernel will only set bits
|
|
* corresponding to the fields that were actually filled by the kernel.
|
|
* This also includes any future extensions that might be automatically
|
|
* filled. If the structure size is too small to contain a field
|
|
* (requested or not), to avoid confusion the mask will not
|
|
* contain a bit for that field.
|
|
*
|
|
* As such, userspace MUST verify that mask contains the
|
|
* corresponding flags after the ioctl(2) returns to ensure that it is
|
|
* using valid data.
|
|
*/
|
|
__u64 mask;
|
|
/*
|
|
* The information contained in the following fields might be stale at the
|
|
* time it is received, as the target process might have exited as soon as
|
|
* the IOCTL was processed, and there is no way to avoid that. However, it
|
|
* is guaranteed that if the call was successful, then the information was
|
|
* correct and referred to the intended process at the time the work was
|
|
* performed. */
|
|
__u64 cgroupid;
|
|
__u32 pid;
|
|
__u32 tgid;
|
|
__u32 ppid;
|
|
__u32 ruid;
|
|
__u32 rgid;
|
|
__u32 euid;
|
|
__u32 egid;
|
|
__u32 suid;
|
|
__u32 sgid;
|
|
__u32 fsuid;
|
|
__u32 fsgid;
|
|
__s32 exit_code;
|
|
__u32 coredump_mask;
|
|
__u32 __spare1;
|
|
};
|
|
|
|
#define PIDFS_IOCTL_MAGIC 0xFF
|
|
|
|
#define PIDFD_GET_CGROUP_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 1)
|
|
#define PIDFD_GET_IPC_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 2)
|
|
#define PIDFD_GET_MNT_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 3)
|
|
#define PIDFD_GET_NET_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 4)
|
|
#define PIDFD_GET_PID_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 5)
|
|
#define PIDFD_GET_PID_FOR_CHILDREN_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 6)
|
|
#define PIDFD_GET_TIME_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 7)
|
|
#define PIDFD_GET_TIME_FOR_CHILDREN_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 8)
|
|
#define PIDFD_GET_USER_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 9)
|
|
#define PIDFD_GET_UTS_NAMESPACE _IO(PIDFS_IOCTL_MAGIC, 10)
|
|
#define PIDFD_GET_INFO _IOWR(PIDFS_IOCTL_MAGIC, 11, struct pidfd_info)
|
|
|
|
#endif /* _UAPI_LINUX_PIDFD_H */
|