include/linux/msg.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _LINUX_MSG_H
   3 #define _LINUX_MSG_H
   4
   5 #include <linux/list.h>
   6 #include <linux/time64.h>
   7 #include <uapi/linux/msg.h>
   8
   9 /* one msg_msg structure for each message */
  10 struct msg_msg {
  11         struct list_head m_list;
  12         long m_type;
  13         size_t m_ts;            /* message text size */
  14         struct msg_msgseg *next;
  15         void *security;
  16         /* the actual message follows immediately */
  17 };
  18
  19 /* one msq_queue structure for each present queue on the system */
  20 struct msg_queue {
  21         struct kern_ipc_perm q_perm;
  22         time64_t q_stime;               /* last msgsnd time */
  23         time64_t q_rtime;               /* last msgrcv time */
  24         time64_t q_ctime;               /* last change time */
  25         unsigned long q_cbytes;         /* current number of bytes on queue */
  26         unsigned long q_qnum;           /* number of messages in queue */
  27         unsigned long q_qbytes;         /* max number of bytes on queue */
  28         pid_t q_lspid;                  /* pid of last msgsnd */
  29         pid_t q_lrpid;                  /* last receive pid */
  30
  31         struct list_head q_messages;
  32         struct list_head q_receivers;
  33         struct list_head q_senders;
  34 } __randomize_layout;
  35
  36 #endif /* _LINUX_MSG_H */