Commit 3440a6bd authored by Davidlohr Bueso's avatar Davidlohr Bueso Committed by Linus Torvalds
Browse files

ipc,msg: move some msgq ns code around 



Nothing big and no logical changes, just get rid of some redundant
function declarations.  Move msg_[init/exit]_ns down the end of the
file.

Signed-off-by: default avatarDavidlohr Bueso <davidlohr@hp.com>
Signed-off-by: default avatarManfred Spraul <manfred@colorfullife.com>
Cc: Aswin Chandramouleeswaran <aswin@hp.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent f75a2f35

ipc/msg.c

+63 −69
Original line number Diff line number Diff line
@@ -70,75 +70,6 @@ struct msg_sender { 


#define msg_ids(ns)	((ns)->ids[IPC_MSG_IDS])



static void freeque(struct ipc_namespace *, struct kern_ipc_perm *);

static int newque(struct ipc_namespace *, struct ipc_params *);

#ifdef CONFIG_PROC_FS

static int sysvipc_msg_proc_show(struct seq_file *s, void *it);

#endif



/*

 * Scale msgmni with the available lowmem size: the memory dedicated to msg

 * queues should occupy at most 1/MSG_MEM_SCALE of lowmem.

 * Also take into account the number of nsproxies created so far.

 * This should be done staying within the (MSGMNI , IPCMNI/nr_ipc_ns) range.

 */

void recompute_msgmni(struct ipc_namespace *ns)

{

	struct sysinfo i;

	unsigned long allowed;

	int nb_ns;



	si_meminfo(&i);

	allowed = (((i.totalram - i.totalhigh) / MSG_MEM_SCALE) * i.mem_unit)

		/ MSGMNB;

	nb_ns = atomic_read(&nr_ipc_ns);

	allowed /= nb_ns;



	if (allowed < MSGMNI) {

		ns->msg_ctlmni = MSGMNI;

		return;

	}



	if (allowed > IPCMNI / nb_ns) {

		ns->msg_ctlmni = IPCMNI / nb_ns;

		return;

	}



	ns->msg_ctlmni = allowed;

}



void msg_init_ns(struct ipc_namespace *ns)

{

	ns->msg_ctlmax = MSGMAX;

	ns->msg_ctlmnb = MSGMNB;



	recompute_msgmni(ns);



	atomic_set(&ns->msg_bytes, 0);

	atomic_set(&ns->msg_hdrs, 0);

	ipc_init_ids(&ns->ids[IPC_MSG_IDS]);

}



#ifdef CONFIG_IPC_NS

void msg_exit_ns(struct ipc_namespace *ns)

{

	free_ipcs(ns, &msg_ids(ns), freeque);

	idr_destroy(&ns->ids[IPC_MSG_IDS].ipcs_idr);

}

#endif



void __init msg_init(void)

{

	msg_init_ns(&init_ipc_ns);



	printk(KERN_INFO "msgmni has been set to %d\n",

		init_ipc_ns.msg_ctlmni);



	ipc_init_proc_interface("sysvipc/msg",

				"       key      msqid perms      cbytes       qnum lspid lrpid   uid   gid  cuid  cgid      stime      rtime      ctime\n",

				IPC_MSG_IDS, sysvipc_msg_proc_show);

}



static inline struct msg_queue *msq_obtain_object(struct ipc_namespace *ns, int id)

{

	struct kern_ipc_perm *ipcp = ipc_obtain_object(&msg_ids(ns), id);
@@ -1054,6 +985,57 @@ SYSCALL_DEFINE5(msgrcv, int, msqid, struct msgbuf __user *, msgp, size_t, msgsz, 
	return do_msgrcv(msqid, msgp, msgsz, msgtyp, msgflg, do_msg_fill);

}



/*

 * Scale msgmni with the available lowmem size: the memory dedicated to msg

 * queues should occupy at most 1/MSG_MEM_SCALE of lowmem.

 * Also take into account the number of nsproxies created so far.

 * This should be done staying within the (MSGMNI , IPCMNI/nr_ipc_ns) range.

 */

void recompute_msgmni(struct ipc_namespace *ns)

{

	struct sysinfo i;

	unsigned long allowed;

	int nb_ns;



	si_meminfo(&i);

	allowed = (((i.totalram - i.totalhigh) / MSG_MEM_SCALE) * i.mem_unit)

		/ MSGMNB;

	nb_ns = atomic_read(&nr_ipc_ns);

	allowed /= nb_ns;



	if (allowed < MSGMNI) {

		ns->msg_ctlmni = MSGMNI;

		return;

	}



	if (allowed > IPCMNI / nb_ns) {

		ns->msg_ctlmni = IPCMNI / nb_ns;

		return;

	}



	ns->msg_ctlmni = allowed;

}



void msg_init_ns(struct ipc_namespace *ns)

{

	ns->msg_ctlmax = MSGMAX;

	ns->msg_ctlmnb = MSGMNB;



	recompute_msgmni(ns);



	atomic_set(&ns->msg_bytes, 0);

	atomic_set(&ns->msg_hdrs, 0);

	ipc_init_ids(&ns->ids[IPC_MSG_IDS]);

}



#ifdef CONFIG_IPC_NS

void msg_exit_ns(struct ipc_namespace *ns)

{

	free_ipcs(ns, &msg_ids(ns), freeque);

	idr_destroy(&ns->ids[IPC_MSG_IDS].ipcs_idr);

}

#endif



#ifdef CONFIG_PROC_FS

static int sysvipc_msg_proc_show(struct seq_file *s, void *it)

{
@@ -1078,3 +1060,15 @@ static int sysvipc_msg_proc_show(struct seq_file *s, void *it) 
			msq->q_ctime);

}

#endif



void __init msg_init(void)

{

	msg_init_ns(&init_ipc_ns);



	printk(KERN_INFO "msgmni has been set to %d\n",

		init_ipc_ns.msg_ctlmni);



	ipc_init_proc_interface("sysvipc/msg",

				"       key      msqid perms      cbytes       qnum lspid lrpid   uid   gid  cuid  cgid      stime      rtime      ctime\n",

				IPC_MSG_IDS, sysvipc_msg_proc_show);

}

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