Commit bdc8e5f8 authored by Serge E. Hallyn's avatar Serge E. Hallyn Committed by Linus Torvalds

namespaces: mqueue namespace: adapt sysctl

Largely inspired from ipc/ipc_sysctl.c.  This patch isolates the mqueue
sysctl stuff in its own file.

[akpm@linux-foundation.org: build fix]
Signed-off-by: 's avatarCedric Le Goater <clg@fr.ibm.com>
Signed-off-by: 's avatarNadia Derbey <Nadia.Derbey@bull.net>
Signed-off-by: 's avatarSerge E. Hallyn <serue@us.ibm.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: 's avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: 's avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 7eafd7c7
......@@ -128,4 +128,18 @@ static inline void put_ipc_ns(struct ipc_namespace *ns)
{
}
#endif
#ifdef CONFIG_POSIX_MQUEUE_SYSCTL
struct ctl_table_header;
extern struct ctl_table_header *mq_register_sysctl_table(void);
#else /* CONFIG_POSIX_MQUEUE_SYSCTL */
static inline struct ctl_table_header *mq_register_sysctl_table(void)
{
return NULL;
}
#endif /* CONFIG_POSIX_MQUEUE_SYSCTL */
#endif
......@@ -208,6 +208,12 @@ config POSIX_MQUEUE
If unsure, say Y.
config POSIX_MQUEUE_SYSCTL
bool
depends on POSIX_MQUEUE
depends on SYSCTL
default y
config BSD_PROCESS_ACCT
bool "BSD Process Accounting"
help
......
......@@ -8,4 +8,5 @@ obj-$(CONFIG_SYSVIPC_SYSCTL) += ipc_sysctl.o
obj_mq-$(CONFIG_COMPAT) += compat_mq.o
obj-$(CONFIG_POSIX_MQUEUE) += mqueue.o msgutil.o $(obj_mq-y)
obj-$(CONFIG_IPC_NS) += namespace.o
obj-$(CONFIG_POSIX_MQUEUE_SYSCTL) += mq_sysctl.o
/*
* Copyright (C) 2007 IBM Corporation
*
* Author: Cedric Le Goater <clg@fr.ibm.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation, version 2 of the
* License.
*/
#include <linux/nsproxy.h>
#include <linux/ipc_namespace.h>
#include <linux/sysctl.h>
/*
* Define the ranges various user-specified maximum values can
* be set to.
*/
#define MIN_MSGMAX 1 /* min value for msg_max */
#define MAX_MSGMAX HARD_MSGMAX /* max value for msg_max */
#define MIN_MSGSIZEMAX 128 /* min value for msgsize_max */
#define MAX_MSGSIZEMAX (8192*128) /* max value for msgsize_max */
static void *get_mq(ctl_table *table)
{
char *which = table->data;
struct ipc_namespace *ipc_ns = current->nsproxy->ipc_ns;
which = (which - (char *)&init_ipc_ns) + (char *)ipc_ns;
return which;
}
#ifdef CONFIG_PROC_SYSCTL
static int proc_mq_dointvec(ctl_table *table, int write, struct file *filp,
void __user *buffer, size_t *lenp, loff_t *ppos)
{
struct ctl_table mq_table;
memcpy(&mq_table, table, sizeof(mq_table));
mq_table.data = get_mq(table);
return proc_dointvec(&mq_table, write, filp, buffer, lenp, ppos);
}
static int proc_mq_dointvec_minmax(ctl_table *table, int write,
struct file *filp, void __user *buffer, size_t *lenp, loff_t *ppos)
{
struct ctl_table mq_table;
memcpy(&mq_table, table, sizeof(mq_table));
mq_table.data = get_mq(table);
return proc_dointvec_minmax(&mq_table, write, filp, buffer,
lenp, ppos);
}
#else
#define proc_mq_dointvec NULL
#define proc_mq_dointvec_minmax NULL
#endif
static int msg_max_limit_min = MIN_MSGMAX;
static int msg_max_limit_max = MAX_MSGMAX;
static int msg_maxsize_limit_min = MIN_MSGSIZEMAX;
static int msg_maxsize_limit_max = MAX_MSGSIZEMAX;
static ctl_table mq_sysctls[] = {
{
.procname = "queues_max",
.data = &init_ipc_ns.mq_queues_max,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_mq_dointvec,
},
{
.procname = "msg_max",
.data = &init_ipc_ns.mq_msg_max,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_mq_dointvec_minmax,
.extra1 = &msg_max_limit_min,
.extra2 = &msg_max_limit_max,
},
{
.procname = "msgsize_max",
.data = &init_ipc_ns.mq_msgsize_max,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_mq_dointvec_minmax,
.extra1 = &msg_maxsize_limit_min,
.extra2 = &msg_maxsize_limit_max,
},
{ .ctl_name = 0 }
};
static ctl_table mq_sysctl_dir[] = {
{
.procname = "mqueue",
.mode = 0555,
.child = mq_sysctls,
},
{ .ctl_name = 0 }
};
static ctl_table mq_sysctl_root[] = {
{
.ctl_name = CTL_FS,
.procname = "fs",
.mode = 0555,
.child = mq_sysctl_dir,
},
{ .ctl_name = 0 }
};
struct ctl_table_header *mq_register_sysctl_table(void)
{
return register_sysctl_table(mq_sysctl_root);
}
......@@ -47,15 +47,6 @@
#define STATE_PENDING 1
#define STATE_READY 2
/*
* Define the ranges various user-specified maximum values can
* be set to.
*/
#define MIN_MSGMAX 1 /* min value for msg_max */
#define MAX_MSGMAX HARD_MSGMAX /* max value for msg_max */
#define MIN_MSGSIZEMAX 128 /* min value for msgsize_max */
#define MAX_MSGSIZEMAX (8192*128) /* max value for msgsize_max */
struct ext_wait_queue { /* queue of sleeping tasks */
struct task_struct *task;
struct list_head list;
......@@ -1271,60 +1262,6 @@ void mq_put_mnt(struct ipc_namespace *ns)
mntput(ns->mq_mnt);
}
static int msg_max_limit_min = MIN_MSGMAX;
static int msg_max_limit_max = MAX_MSGMAX;
static int msg_maxsize_limit_min = MIN_MSGSIZEMAX;
static int msg_maxsize_limit_max = MAX_MSGSIZEMAX;
static ctl_table mq_sysctls[] = {
{
.procname = "queues_max",
.data = &init_ipc_ns.mq_queues_max,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec,
},
{
.procname = "msg_max",
.data = &init_ipc_ns.mq_msg_max,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec_minmax,
.extra1 = &msg_max_limit_min,
.extra2 = &msg_max_limit_max,
},
{
.procname = "msgsize_max",
.data = &init_ipc_ns.mq_msgsize_max,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = &proc_dointvec_minmax,
.extra1 = &msg_maxsize_limit_min,
.extra2 = &msg_maxsize_limit_max,
},
{ .ctl_name = 0 }
};
static ctl_table mq_sysctl_dir[] = {
{
.procname = "mqueue",
.mode = 0555,
.child = mq_sysctls,
},
{ .ctl_name = 0 }
};
static ctl_table mq_sysctl_root[] = {
{
.ctl_name = CTL_FS,
.procname = "fs",
.mode = 0555,
.child = mq_sysctl_dir,
},
{ .ctl_name = 0 }
};
static int __init init_mqueue_fs(void)
{
int error;
......@@ -1336,7 +1273,7 @@ static int __init init_mqueue_fs(void)
return -ENOMEM;
/* ignore failues - they are not fatal */
mq_sysctl_table = register_sysctl_table(mq_sysctl_root);
mq_sysctl_table = mq_register_sysctl_table();
error = register_filesystem(&mqueue_fs_type);
if (error)
......
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