statmount.h

 1/* SPDX-License-Identifier: GPL-2.0 */
 2
 3#ifndef __STATMOUNT_H
 4#define __STATMOUNT_H
 5
 6#include <stdint.h>
 7#include <linux/mount.h>
 8#include <asm/unistd.h>
 9
10#ifndef __NR_statmount
11	#if defined __alpha__
12		#define __NR_statmount 567
13	#elif defined _MIPS_SIM
14		#if _MIPS_SIM == _MIPS_SIM_ABI32	/* o32 */
15			#define __NR_statmount 4457
16		#endif
17		#if _MIPS_SIM == _MIPS_SIM_NABI32	/* n32 */
18			#define __NR_statmount 6457
19		#endif
20		#if _MIPS_SIM == _MIPS_SIM_ABI64	/* n64 */
21			#define __NR_statmount 5457
22		#endif
23	#else
24		#define __NR_statmount 457
25	#endif
26#endif
27
28#ifndef __NR_listmount
29	#if defined __alpha__
30		#define __NR_listmount 568
31	#elif defined _MIPS_SIM
32		#if _MIPS_SIM == _MIPS_SIM_ABI32	/* o32 */
33			#define __NR_listmount 4458
34		#endif
35		#if _MIPS_SIM == _MIPS_SIM_NABI32	/* n32 */
36			#define __NR_listmount 6458
37		#endif
38		#if _MIPS_SIM == _MIPS_SIM_ABI64	/* n64 */
39			#define __NR_listmount 5458
40		#endif
41	#else
42		#define __NR_listmount 458
43	#endif
44#endif
45
46static inline int statmount(uint64_t mnt_id, uint64_t mnt_ns_id, uint64_t mask,
47			    struct statmount *buf, size_t bufsize,
48			    unsigned int flags)
49{
50	struct mnt_id_req req = {
51		.size = MNT_ID_REQ_SIZE_VER0,
52		.mnt_id = mnt_id,
53		.param = mask,
54	};
55
56	if (mnt_ns_id) {
57		req.size = MNT_ID_REQ_SIZE_VER1;
58		req.mnt_ns_id = mnt_ns_id;
59	}
60
61	return syscall(__NR_statmount, &req, buf, bufsize, flags);
62}
63
64static inline ssize_t listmount(uint64_t mnt_id, uint64_t mnt_ns_id,
65			 uint64_t last_mnt_id, uint64_t list[], size_t num,
66			 unsigned int flags)
67{
68	struct mnt_id_req req = {
69		.size = MNT_ID_REQ_SIZE_VER0,
70		.mnt_id = mnt_id,
71		.param = last_mnt_id,
72	};
73
74	if (mnt_ns_id) {
75		req.size = MNT_ID_REQ_SIZE_VER1;
76		req.mnt_ns_id = mnt_ns_id;
77	}
78
79	return syscall(__NR_listmount, &req, list, num, flags);
80}
81
82#endif /* __STATMOUNT_H */