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hugetlb: fix overcommit locking
[linux-2.6-block.git] / kernel / sysctl.c
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 45e76f209dcbd8a84083776e80ecb88f3ea8bfaa..8b7e95411795793724f036594e1446e32f1e444b 100644 (file)
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -37,7 +37,6 @@
 #include <linux/highuid.h>
 #include <linux/writeback.h>
 #include <linux/hugetlb.h>
-#include <linux/security.h>
 #include <linux/initrd.h>
 #include <linux/times.h>
 #include <linux/limits.h>
@@ -53,6 +52,7 @@
 #ifdef CONFIG_X86
 #include <asm/nmi.h>
 #include <asm/stacktrace.h>
+#include <asm/io.h>
 #endif
 
 static int deprecated_sysctl_warning(struct __sysctl_args *args);
@@ -66,26 +66,27 @@ extern int sysctl_overcommit_memory;
 extern int sysctl_overcommit_ratio;
 extern int sysctl_panic_on_oom;
 extern int sysctl_oom_kill_allocating_task;
+extern int sysctl_oom_dump_tasks;
 extern int max_threads;
 extern int core_uses_pid;
 extern int suid_dumpable;
 extern char core_pattern[];
 extern int pid_max;
 extern int min_free_kbytes;
-extern int printk_ratelimit_jiffies;
-extern int printk_ratelimit_burst;
 extern int pid_max_min, pid_max_max;
 extern int sysctl_drop_caches;
 extern int percpu_pagelist_fraction;
 extern int compat_log;
 extern int maps_protect;
 extern int sysctl_stat_interval;
-extern int audit_argv_kb;
 extern int latencytop_enabled;
 
 /* Constants used for minimum and  maximum */
-#ifdef CONFIG_DETECT_SOFTLOCKUP
+#if defined(CONFIG_DETECT_SOFTLOCKUP) || defined(CONFIG_HIGHMEM)
 static int one = 1;
+#endif
+
+#ifdef CONFIG_DETECT_SOFTLOCKUP
 static int sixty = 60;
 #endif
 
@@ -200,14 +201,6 @@ static struct ctl_table root_table[] = {
                .mode           = 0555,
                .child          = vm_table,
        },
-#ifdef CONFIG_NET
-       {
-               .ctl_name       = CTL_NET,
-               .procname       = "net",
-               .mode           = 0555,
-               .child          = net_table,
-       },
-#endif
        {
                .ctl_name       = CTL_FS,
                .procname       = "fs",
@@ -318,22 +311,6 @@ static struct ctl_table kern_table[] = {
                .mode           = 0644,
                .proc_handler   = &proc_dointvec,
        },
-       {
-               .ctl_name       = CTL_UNNUMBERED,
-               .procname       = "sched_rt_period_ms",
-               .data           = &sysctl_sched_rt_period,
-               .maxlen         = sizeof(unsigned int),
-               .mode           = 0644,
-               .proc_handler   = &proc_dointvec,
-       },
-       {
-               .ctl_name       = CTL_UNNUMBERED,
-               .procname       = "sched_rt_ratio",
-               .data           = &sysctl_sched_rt_ratio,
-               .maxlen         = sizeof(unsigned int),
-               .mode           = 0644,
-               .proc_handler   = &proc_dointvec,
-       },
 #if defined(CONFIG_FAIR_GROUP_SCHED) && defined(CONFIG_SMP)
        {
                .ctl_name       = CTL_UNNUMBERED,
@@ -353,6 +330,22 @@ static struct ctl_table kern_table[] = {
        },
 #endif
 #endif
+       {
+               .ctl_name       = CTL_UNNUMBERED,
+               .procname       = "sched_rt_period_us",
+               .data           = &sysctl_sched_rt_period,
+               .maxlen         = sizeof(unsigned int),
+               .mode           = 0644,
+               .proc_handler   = &proc_dointvec,
+       },
+       {
+               .ctl_name       = CTL_UNNUMBERED,
+               .procname       = "sched_rt_runtime_us",
+               .data           = &sysctl_sched_rt_runtime,
+               .maxlen         = sizeof(int),
+               .mode           = 0644,
+               .proc_handler   = &proc_dointvec,
+       },
        {
                .ctl_name       = CTL_UNNUMBERED,
                .procname       = "sched_compat_yield",
@@ -397,16 +390,6 @@ static struct ctl_table kern_table[] = {
                .mode           = 0644,
                .proc_handler   = &proc_dointvec,
        },
-#ifdef CONFIG_AUDITSYSCALL
-       {
-               .ctl_name       = CTL_UNNUMBERED,
-               .procname       = "audit_argv_kb",
-               .data           = &audit_argv_kb,
-               .maxlen         = sizeof(int),
-               .mode           = 0644,
-               .proc_handler   = &proc_dointvec,
-       },
-#endif
        {
                .ctl_name       = KERN_CORE_PATTERN,
                .procname       = "core_pattern",
@@ -434,15 +417,6 @@ static struct ctl_table kern_table[] = {
                .proc_handler   = &proc_dointvec,
        },
 #endif
-#ifdef CONFIG_SECURITY_CAPABILITIES
-       {
-               .procname       = "cap-bound",
-               .data           = &cap_bset,
-               .maxlen         = sizeof(kernel_cap_t),
-               .mode           = 0600,
-               .proc_handler   = &proc_dointvec_bset,
-       },
-#endif /* def CONFIG_SECURITY_CAPABILITIES */
 #ifdef CONFIG_BLK_DEV_INITRD
        {
                .ctl_name       = KERN_REALROOTDEV,
@@ -514,14 +488,6 @@ static struct ctl_table kern_table[] = {
                .mode           = 0644,
                .proc_handler   = &proc_dointvec,
        },
-       {
-               .ctl_name       = KERN_PRINTK,
-               .procname       = "printk",
-               .data           = &console_loglevel,
-               .maxlen         = 4*sizeof(int),
-               .mode           = 0644,
-               .proc_handler   = &proc_dointvec,
-       },
 #ifdef CONFIG_KMOD
        {
                .ctl_name       = KERN_MODPROBE,
@@ -668,6 +634,15 @@ static struct ctl_table kern_table[] = {
                .mode           = 0644,
                .proc_handler   = &proc_dointvec,
        },
+#if defined CONFIG_PRINTK
+       {
+               .ctl_name       = KERN_PRINTK,
+               .procname       = "printk",
+               .data           = &console_loglevel,
+               .maxlen         = 4*sizeof(int),
+               .mode           = 0644,
+               .proc_handler   = &proc_dointvec,
+       },
        {
                .ctl_name       = KERN_PRINTK_RATELIMIT,
                .procname       = "printk_ratelimit",
@@ -685,6 +660,7 @@ static struct ctl_table kern_table[] = {
                .mode           = 0644,
                .proc_handler   = &proc_dointvec,
        },
+#endif
        {
                .ctl_name       = KERN_NGROUPS_MAX,
                .procname       = "ngroups_max",
@@ -735,6 +711,14 @@ static struct ctl_table kern_table[] = {
                .mode           = 0644,
                .proc_handler   = &proc_dointvec,
        },
+       {
+               .ctl_name       = CTL_UNNUMBERED,
+               .procname       = "io_delay_type",
+               .data           = &io_delay_type,
+               .maxlen         = sizeof(int),
+               .mode           = 0644,
+               .proc_handler   = &proc_dointvec,
+       },
 #endif
 #if defined(CONFIG_MMU)
        {
@@ -886,6 +870,14 @@ static struct ctl_table vm_table[] = {
                .mode           = 0644,
                .proc_handler   = &proc_dointvec,
        },
+       {
+               .ctl_name       = CTL_UNNUMBERED,
+               .procname       = "oom_dump_tasks",
+               .data           = &sysctl_oom_dump_tasks,
+               .maxlen         = sizeof(sysctl_oom_dump_tasks),
+               .mode           = 0644,
+               .proc_handler   = &proc_dointvec,
+       },
        {
                .ctl_name       = VM_OVERCOMMIT_RATIO,
                .procname       = "overcommit_ratio",
@@ -986,10 +978,10 @@ static struct ctl_table vm_table[] = {
        {
                .ctl_name       = CTL_UNNUMBERED,
                .procname       = "nr_overcommit_hugepages",
-               .data           = &nr_overcommit_huge_pages,
-               .maxlen         = sizeof(nr_overcommit_huge_pages),
+               .data           = &sysctl_overcommit_huge_pages,
+               .maxlen         = sizeof(sysctl_overcommit_huge_pages),
                .mode           = 0644,
-               .proc_handler   = &proc_doulongvec_minmax,
+               .proc_handler   = &hugetlb_overcommit_handler,
        },
 #endif
        {
@@ -1160,6 +1152,19 @@ static struct ctl_table vm_table[] = {
                .extra1         = &zero,
        },
 #endif
+#ifdef CONFIG_HIGHMEM
+       {
+               .ctl_name       = CTL_UNNUMBERED,
+               .procname       = "highmem_is_dirtyable",
+               .data           = &vm_highmem_is_dirtyable,
+               .maxlen         = sizeof(vm_highmem_is_dirtyable),
+               .mode           = 0644,
+               .proc_handler   = &proc_dointvec_minmax,
+               .strategy       = &sysctl_intvec,
+               .extra1         = &zero,
+               .extra2         = &one,
+       },
+#endif
 /*
  * NOTE: do not add new entries to this table unless you have read
  * Documentation/sysctl/ctl_unnumbered.txt
@@ -1205,6 +1210,14 @@ static struct ctl_table fs_table[] = {
                .mode           = 0644,
                .proc_handler   = &proc_dointvec,
        },
+       {
+               .ctl_name       = CTL_UNNUMBERED,
+               .procname       = "nr_open",
+               .data           = &sysctl_nr_open,
+               .maxlen         = sizeof(int),
+               .mode           = 0644,
+               .proc_handler   = &proc_dointvec,
+       },
        {
                .ctl_name       = FS_DENTRY,
                .procname       = "dentry-state",
@@ -2090,26 +2103,6 @@ static int do_proc_dointvec_bset_conv(int *negp, unsigned long *lvalp,
        return 0;
 }
 
-#ifdef CONFIG_SECURITY_CAPABILITIES
-/*
- *     init may raise the set.
- */
-
-int proc_dointvec_bset(struct ctl_table *table, int write, struct file *filp,
-                       void __user *buffer, size_t *lenp, loff_t *ppos)
-{
-       int op;
-
-       if (write && !capable(CAP_SYS_MODULE)) {
-               return -EPERM;
-       }
-
-       op = is_global_init(current) ? OP_SET : OP_AND;
-       return do_proc_dointvec(table,write,filp,buffer,lenp,ppos,
-                               do_proc_dointvec_bset_conv,&op);
-}
-#endif /* def CONFIG_SECURITY_CAPABILITIES */
-
 /*
  *     Taint values can only be increased
  */
@@ -2494,7 +2487,7 @@ static int proc_do_cad_pid(struct ctl_table *table, int write, struct file *filp
        pid_t tmp;
        int r;
 
-       tmp = pid_nr_ns(cad_pid, current->nsproxy->pid_ns);
+       tmp = pid_vnr(cad_pid);
 
        r = __do_proc_dointvec(&tmp, table, write, filp, buffer,
                               lenp, ppos, NULL, NULL);
@@ -2523,12 +2516,6 @@ int proc_dointvec(struct ctl_table *table, int write, struct file *filp,
        return -ENOSYS;
 }
 
-int proc_dointvec_bset(struct ctl_table *table, int write, struct file *filp,
-                       void __user *buffer, size_t *lenp, loff_t *ppos)
-{
-       return -ENOSYS;
-}
-
 int proc_dointvec_minmax(struct ctl_table *table, int write, struct file *filp,
                    void __user *buffer, size_t *lenp, loff_t *ppos)
 {
Linux 6.x block layer and io_uring tree(s)