Implement "global" process (and zombie) lists loops iterating over all vps instances and all processes in each.

[bz]

Summary

Implement "global" process (and zombie) lists loops
iterating over all vps instances and all processes in each
(similarly to what was done for vnets).

There are a few per-vps cases which have been marked.

Pointed out by: kib
Sponsored by: iXsystems, Inc.

[bz]

I'll try to get some of the whitespace changes (using sub-functions for highly indented code, etc) out of this patch and into head separately to make it easier to review this one.

[bz]

• Merge branch 'p1' into p2

[bz]

• Looks like there was an unlock lost during the merge.

sys/compat/linuxkpi/common/src/linux_current.c

 and parts of which determine the actions of
 .Fn msgctl .
 The data structure is defined in
 .In sys/msg.h
 and contains (amongst others) the following members:
 .Bd -literal
 struct msqid_ds {
         struct  ipc_perm msg_perm;      /* msg queue permission bits */
-        struct  msg *msg_first; /* first message in the queue */
-        struct  msg *msg_last;  /* last message in the queue */
+        struct  msg *__msg_first;       /* kernel data, don't use */
+        struct  msg *__msg_last;        /* kernel data, don't use */
         msglen_t msg_cbytes;    /* number of bytes in use on the queue */
         msgqnum_t msg_qnum;     /* number of msgs in the queue */
         msglen_t msg_qbytes;    /* max # of bytes on the queue */
         pid_t   msg_lspid;      /* pid of last msgsnd() */
         pid_t   msg_lrpid;      /* pid of last msgrcv() */
         time_t  msg_stime;      /* time of last msgsnd() */
         time_t  msg_rtime;      /* time of last msgrcv() */
         time_t  msg_ctime;      /* time of last msgctl() */

sys/ddb/db_command.c

 and parts of which determine the actions of
 .Fn msgctl .
 The data structure is defined in
 .In sys/msg.h
 and contains (amongst others) the following members:
 .Bd -literal
 struct msqid_ds {
         struct  ipc_perm msg_perm;      /* msg queue permission bits */
-        struct  msg *msg_first; /* first message in the queue */
-        struct  msg *msg_last;  /* last message in the queue */
+        struct  msg *__msg_first;       /* kernel data, don't use */
+        struct  msg *__msg_last;        /* kernel data, don't use */
         msglen_t msg_cbytes;    /* number of bytes in use on the queue */
         msgqnum_t msg_qnum;     /* number of msgs in the queue */
         msglen_t msg_qbytes;    /* max # of bytes on the queue */
         pid_t   msg_lspid;      /* pid of last msgsnd() */
         pid_t   msg_lrpid;      /* pid of last msgrcv() */
         time_t  msg_stime;      /* time of last msgsnd() */
         time_t  msg_rtime;      /* time of last msgrcv() */
         time_t  msg_ctime;      /* time of last msgctl() */

sys/ddb/db_ps.c

 and parts of which determine the actions of
 .Fn msgctl .
 The data structure is defined in
 .In sys/msg.h
 and contains (amongst others) the following members:
 .Bd -literal
 struct msqid_ds {
         struct  ipc_perm msg_perm;      /* msg queue permission bits */
-        struct  msg *msg_first; /* first message in the queue */
-        struct  msg *msg_last;  /* last message in the queue */
+        struct  msg *__msg_first;       /* kernel data, don't use */
+        struct  msg *__msg_last;        /* kernel data, don't use */
         msglen_t msg_cbytes;    /* number of bytes in use on the queue */
         msgqnum_t msg_qnum;     /* number of msgs in the queue */
         msglen_t msg_qbytes;    /* max # of bytes on the queue */
         pid_t   msg_lspid;      /* pid of last msgsnd() */
         pid_t   msg_lrpid;      /* pid of last msgrcv() */
         time_t  msg_stime;      /* time of last msgsnd() */
         time_t  msg_rtime;      /* time of last msgrcv() */
         time_t  msg_ctime;      /* time of last msgctl() */

sys/ddb/db_thread.c

 and parts of which determine the actions of
 .Fn msgctl .
 The data structure is defined in
 .In sys/msg.h
 and contains (amongst others) the following members:
 .Bd -literal
 struct msqid_ds {
         struct  ipc_perm msg_perm;      /* msg queue permission bits */
-        struct  msg *msg_first; /* first message in the queue */
-        struct  msg *msg_last;  /* last message in the queue */
+        struct  msg *__msg_first;       /* kernel data, don't use */
+        struct  msg *__msg_last;        /* kernel data, don't use */
         msglen_t msg_cbytes;    /* number of bytes in use on the queue */
         msgqnum_t msg_qnum;     /* number of msgs in the queue */
         msglen_t msg_qbytes;    /* max # of bytes on the queue */
         pid_t   msg_lspid;      /* pid of last msgsnd() */
         pid_t   msg_lrpid;      /* pid of last msgrcv() */
         time_t  msg_stime;      /* time of last msgsnd() */
         time_t  msg_rtime;      /* time of last msgrcv() */
         time_t  msg_ctime;      /* time of last msgctl() */