Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  *  Copyright (C) 2007
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  *  Author: Eric Biederman <ebiederm@xmision.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/ipc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/nsproxy.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/sysctl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/ipc_namespace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/msg.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include "util.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) static void *get_ipc(struct ctl_table *table)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 	char *which = table->data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 	struct ipc_namespace *ipc_ns = current->nsproxy->ipc_ns;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 	which = (which - (char *)&init_ipc_ns) + (char *)ipc_ns;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 	return which;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #ifdef CONFIG_PROC_SYSCTL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) static int proc_ipc_dointvec(struct ctl_table *table, int write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 		void *buffer, size_t *lenp, loff_t *ppos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	struct ctl_table ipc_table;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	memcpy(&ipc_table, table, sizeof(ipc_table));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	ipc_table.data = get_ipc(table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 	return proc_dointvec(&ipc_table, write, buffer, lenp, ppos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) static int proc_ipc_dointvec_minmax(struct ctl_table *table, int write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 		void *buffer, size_t *lenp, loff_t *ppos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	struct ctl_table ipc_table;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	memcpy(&ipc_table, table, sizeof(ipc_table));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	ipc_table.data = get_ipc(table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	return proc_dointvec_minmax(&ipc_table, write, buffer, lenp, ppos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) static int proc_ipc_dointvec_minmax_orphans(struct ctl_table *table, int write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 		void *buffer, size_t *lenp, loff_t *ppos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	struct ipc_namespace *ns = current->nsproxy->ipc_ns;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	int err = proc_ipc_dointvec_minmax(table, write, buffer, lenp, ppos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	if (err < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 		return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	if (ns->shm_rmid_forced)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 		shm_destroy_orphaned(ns);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) static int proc_ipc_doulongvec_minmax(struct ctl_table *table, int write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 		void *buffer, size_t *lenp, loff_t *ppos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	struct ctl_table ipc_table;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	memcpy(&ipc_table, table, sizeof(ipc_table));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	ipc_table.data = get_ipc(table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	return proc_doulongvec_minmax(&ipc_table, write, buffer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 					lenp, ppos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) static int proc_ipc_auto_msgmni(struct ctl_table *table, int write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 		void *buffer, size_t *lenp, loff_t *ppos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	struct ctl_table ipc_table;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	int dummy = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	memcpy(&ipc_table, table, sizeof(ipc_table));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	ipc_table.data = &dummy;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	if (write)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 		pr_info_once("writing to auto_msgmni has no effect");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	return proc_dointvec_minmax(&ipc_table, write, buffer, lenp, ppos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) static int proc_ipc_sem_dointvec(struct ctl_table *table, int write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	void *buffer, size_t *lenp, loff_t *ppos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	int ret, semmni;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	struct ipc_namespace *ns = current->nsproxy->ipc_ns;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	semmni = ns->sem_ctls[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	ret = proc_ipc_dointvec(table, write, buffer, lenp, ppos);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	if (!ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 		ret = sem_check_semmni(current->nsproxy->ipc_ns);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	 * Reset the semmni value if an error happens.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 		ns->sem_ctls[3] = semmni;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) #define proc_ipc_doulongvec_minmax NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) #define proc_ipc_dointvec	   NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) #define proc_ipc_dointvec_minmax   NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) #define proc_ipc_dointvec_minmax_orphans   NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) #define proc_ipc_auto_msgmni	   NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) #define proc_ipc_sem_dointvec	   NULL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) int ipc_mni = IPCMNI;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) int ipc_mni_shift = IPCMNI_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) int ipc_min_cycle = RADIX_TREE_MAP_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) static struct ctl_table ipc_kern_table[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 		.procname	= "shmmax",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 		.data		= &init_ipc_ns.shm_ctlmax,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 		.maxlen		= sizeof(init_ipc_ns.shm_ctlmax),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 		.mode		= 0644,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 		.proc_handler	= proc_ipc_doulongvec_minmax,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 		.procname	= "shmall",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 		.data		= &init_ipc_ns.shm_ctlall,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 		.maxlen		= sizeof(init_ipc_ns.shm_ctlall),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 		.mode		= 0644,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 		.proc_handler	= proc_ipc_doulongvec_minmax,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 		.procname	= "shmmni",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 		.data		= &init_ipc_ns.shm_ctlmni,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 		.maxlen		= sizeof(init_ipc_ns.shm_ctlmni),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 		.mode		= 0644,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 		.proc_handler	= proc_ipc_dointvec_minmax,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 		.extra1		= SYSCTL_ZERO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 		.extra2		= &ipc_mni,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 		.procname	= "shm_rmid_forced",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 		.data		= &init_ipc_ns.shm_rmid_forced,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 		.maxlen		= sizeof(init_ipc_ns.shm_rmid_forced),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 		.mode		= 0644,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 		.proc_handler	= proc_ipc_dointvec_minmax_orphans,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 		.extra1		= SYSCTL_ZERO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 		.extra2		= SYSCTL_ONE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 		.procname	= "msgmax",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 		.data		= &init_ipc_ns.msg_ctlmax,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 		.maxlen		= sizeof(init_ipc_ns.msg_ctlmax),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 		.mode		= 0644,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 		.proc_handler	= proc_ipc_dointvec_minmax,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 		.extra1		= SYSCTL_ZERO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 		.extra2		= SYSCTL_INT_MAX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 		.procname	= "msgmni",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 		.data		= &init_ipc_ns.msg_ctlmni,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 		.maxlen		= sizeof(init_ipc_ns.msg_ctlmni),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 		.mode		= 0644,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 		.proc_handler	= proc_ipc_dointvec_minmax,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 		.extra1		= SYSCTL_ZERO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 		.extra2		= &ipc_mni,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 		.procname	= "auto_msgmni",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 		.data		= NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 		.maxlen		= sizeof(int),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 		.mode		= 0644,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 		.proc_handler	= proc_ipc_auto_msgmni,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 		.extra1		= SYSCTL_ZERO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 		.extra2		= SYSCTL_ONE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 		.procname	=  "msgmnb",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 		.data		= &init_ipc_ns.msg_ctlmnb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 		.maxlen		= sizeof(init_ipc_ns.msg_ctlmnb),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 		.mode		= 0644,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 		.proc_handler	= proc_ipc_dointvec_minmax,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 		.extra1		= SYSCTL_ZERO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 		.extra2		= SYSCTL_INT_MAX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 		.procname	= "sem",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 		.data		= &init_ipc_ns.sem_ctls,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 		.maxlen		= 4*sizeof(int),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 		.mode		= 0644,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 		.proc_handler	= proc_ipc_sem_dointvec,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) #ifdef CONFIG_CHECKPOINT_RESTORE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 		.procname	= "sem_next_id",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 		.data		= &init_ipc_ns.ids[IPC_SEM_IDS].next_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 		.maxlen		= sizeof(init_ipc_ns.ids[IPC_SEM_IDS].next_id),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 		.mode		= 0644,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 		.proc_handler	= proc_ipc_dointvec_minmax,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 		.extra1		= SYSCTL_ZERO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 		.extra2		= SYSCTL_INT_MAX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 		.procname	= "msg_next_id",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 		.data		= &init_ipc_ns.ids[IPC_MSG_IDS].next_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 		.maxlen		= sizeof(init_ipc_ns.ids[IPC_MSG_IDS].next_id),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 		.mode		= 0644,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 		.proc_handler	= proc_ipc_dointvec_minmax,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 		.extra1		= SYSCTL_ZERO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 		.extra2		= SYSCTL_INT_MAX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 		.procname	= "shm_next_id",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 		.data		= &init_ipc_ns.ids[IPC_SHM_IDS].next_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 		.maxlen		= sizeof(init_ipc_ns.ids[IPC_SHM_IDS].next_id),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 		.mode		= 0644,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 		.proc_handler	= proc_ipc_dointvec_minmax,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 		.extra1		= SYSCTL_ZERO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 		.extra2		= SYSCTL_INT_MAX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	{}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) static struct ctl_table ipc_root_table[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 		.procname	= "kernel",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 		.mode		= 0555,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 		.child		= ipc_kern_table,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	{}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) static int __init ipc_sysctl_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	register_sysctl_table(ipc_root_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) device_initcall(ipc_sysctl_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) static int __init ipc_mni_extend(char *str)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	ipc_mni = IPCMNI_EXTEND;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	ipc_mni_shift = IPCMNI_EXTEND_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	ipc_min_cycle = IPCMNI_EXTEND_MIN_CYCLE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	pr_info("IPCMNI extended to %d.\n", ipc_mni);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) early_param("ipcmni_extend", ipc_mni_extend);