tools/testing/selftests/filesystems/statmount/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 static inline int statmount(uint64_t mnt_id, uint64_t mnt_ns_id, uint64_t mask,
  11                             struct statmount *buf, size_t bufsize,
  12                             unsigned int flags)
  13 {
  14         struct mnt_id_req req = {
  15                 .size = MNT_ID_REQ_SIZE_VER0,
  16                 .mnt_id = mnt_id,
  17                 .param = mask,
  18         };
  19
  20         if (mnt_ns_id) {
  21                 req.size = MNT_ID_REQ_SIZE_VER1;
  22                 req.mnt_ns_id = mnt_ns_id;
  23         }
  24
  25         return syscall(__NR_statmount, &req, buf, bufsize, flags);
  26 }
  27
  28 static ssize_t listmount(uint64_t mnt_id, uint64_t mnt_ns_id,
  29                          uint64_t last_mnt_id, uint64_t list[], size_t num,
  30                          unsigned int flags)
  31 {
  32         struct mnt_id_req req = {
  33                 .size = MNT_ID_REQ_SIZE_VER0,
  34                 .mnt_id = mnt_id,
  35                 .param = last_mnt_id,
  36         };
  37
  38         if (mnt_ns_id) {
  39                 req.size = MNT_ID_REQ_SIZE_VER1;
  40                 req.mnt_ns_id = mnt_ns_id;
  41         }
  42
  43         return syscall(__NR_listmount, &req, list, num, flags);
  44 }
  45
  46 #endif /* __STATMOUNT_H */