* pass kernel pointers to the sysctl ->proc_handler method v2
@ 2020-04-21 17:15 Christoph Hellwig
2020-04-21 17:15 ` [PATCH 1/5] bpf-cgroup: remove unused exports Christoph Hellwig
` (4 more replies)
0 siblings, 5 replies; 17+ messages in thread
From: Christoph Hellwig @ 2020-04-21 17:15 UTC (permalink / raw)
To: Kees Cook, Iurii Zaikin
Cc: Alexei Starovoitov, Daniel Borkmann, linux-kernel, linux-mm,
linux-fsdevel, netdev, bpf
Hi all,
this series changes the sysctl ->proc_handler methods to take kernel
pointers. This simplifies some of the pointer handling in the methods
(which could probably be further simplified now), and gets rid of the
set_fs address space overrides used by bpf.
Changes since v1:
- drop a patch merged by Greg
- don't copy data out on a write
- fix buffer allocation in bpf
^ permalink raw reply [flat|nested] 17+ messages in thread
* [PATCH 1/5] bpf-cgroup: remove unused exports
2020-04-21 17:15 pass kernel pointers to the sysctl ->proc_handler method v2 Christoph Hellwig
@ 2020-04-21 17:15 ` Christoph Hellwig
2020-04-22 23:39 ` Andrey Ignatov
2020-04-21 17:15 ` [PATCH 2/5] mm: remove watermark_boost_factor_sysctl_handler Christoph Hellwig
` (3 subsequent siblings)
4 siblings, 1 reply; 17+ messages in thread
From: Christoph Hellwig @ 2020-04-21 17:15 UTC (permalink / raw)
To: Kees Cook, Iurii Zaikin
Cc: Alexei Starovoitov, Daniel Borkmann, linux-kernel, linux-mm,
linux-fsdevel, netdev, bpf
Except for a few of the networking hooks called from modular ipv4 or
ipv6 code, all of hooks are just called from guaranteed to be built-in
code.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
kernel/bpf/cgroup.c | 4 ----
1 file changed, 4 deletions(-)
diff --git a/kernel/bpf/cgroup.c b/kernel/bpf/cgroup.c
index cb305e71e7de..929d9a7263da 100644
--- a/kernel/bpf/cgroup.c
+++ b/kernel/bpf/cgroup.c
@@ -1054,7 +1054,6 @@ int __cgroup_bpf_check_dev_permission(short dev_type, u32 major, u32 minor,
return !allow;
}
-EXPORT_SYMBOL(__cgroup_bpf_check_dev_permission);
static const struct bpf_func_proto *
cgroup_base_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
@@ -1221,7 +1220,6 @@ int __cgroup_bpf_run_filter_sysctl(struct ctl_table_header *head,
return ret == 1 ? 0 : -EPERM;
}
-EXPORT_SYMBOL(__cgroup_bpf_run_filter_sysctl);
#ifdef CONFIG_NET
static bool __cgroup_bpf_prog_array_is_empty(struct cgroup *cgrp,
@@ -1326,7 +1324,6 @@ int __cgroup_bpf_run_filter_setsockopt(struct sock *sk, int *level,
sockopt_free_buf(&ctx);
return ret;
}
-EXPORT_SYMBOL(__cgroup_bpf_run_filter_setsockopt);
int __cgroup_bpf_run_filter_getsockopt(struct sock *sk, int level,
int optname, char __user *optval,
@@ -1413,7 +1410,6 @@ int __cgroup_bpf_run_filter_getsockopt(struct sock *sk, int level,
sockopt_free_buf(&ctx);
return ret;
}
-EXPORT_SYMBOL(__cgroup_bpf_run_filter_getsockopt);
#endif
static ssize_t sysctl_cpy_dir(const struct ctl_dir *dir, char **bufp,
--
2.26.1
^ permalink raw reply related [flat|nested] 17+ messages in thread
* [PATCH 2/5] mm: remove watermark_boost_factor_sysctl_handler
2020-04-21 17:15 pass kernel pointers to the sysctl ->proc_handler method v2 Christoph Hellwig
2020-04-21 17:15 ` [PATCH 1/5] bpf-cgroup: remove unused exports Christoph Hellwig
@ 2020-04-21 17:15 ` Christoph Hellwig
2020-04-21 19:31 ` David Rientjes
2020-04-21 17:15 ` [PATCH 3/5] sysctl: remove all extern declaration from sysctl.c Christoph Hellwig
` (2 subsequent siblings)
4 siblings, 1 reply; 17+ messages in thread
From: Christoph Hellwig @ 2020-04-21 17:15 UTC (permalink / raw)
To: Kees Cook, Iurii Zaikin
Cc: Alexei Starovoitov, Daniel Borkmann, linux-kernel, linux-mm,
linux-fsdevel, netdev, bpf
watermark_boost_factor_sysctl_handler is just a pointless wrapper for
proc_dointvec_minmax, so remove it and use proc_dointvec_minmax
directly.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
include/linux/mmzone.h | 2 --
kernel/sysctl.c | 2 +-
mm/page_alloc.c | 12 ------------
3 files changed, 1 insertion(+), 15 deletions(-)
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 1b9de7d220fb..f37bb8f187fc 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -911,8 +911,6 @@ static inline int is_highmem(struct zone *zone)
struct ctl_table;
int min_free_kbytes_sysctl_handler(struct ctl_table *, int,
void __user *, size_t *, loff_t *);
-int watermark_boost_factor_sysctl_handler(struct ctl_table *, int,
- void __user *, size_t *, loff_t *);
int watermark_scale_factor_sysctl_handler(struct ctl_table *, int,
void __user *, size_t *, loff_t *);
extern int sysctl_lowmem_reserve_ratio[MAX_NR_ZONES];
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 8a176d8727a3..99d27acf4646 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -1491,7 +1491,7 @@ static struct ctl_table vm_table[] = {
.data = &watermark_boost_factor,
.maxlen = sizeof(watermark_boost_factor),
.mode = 0644,
- .proc_handler = watermark_boost_factor_sysctl_handler,
+ .proc_handler = proc_dointvec_minmax,
.extra1 = SYSCTL_ZERO,
},
{
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 69827d4fa052..62c1550cd43e 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -7978,18 +7978,6 @@ int min_free_kbytes_sysctl_handler(struct ctl_table *table, int write,
return 0;
}
-int watermark_boost_factor_sysctl_handler(struct ctl_table *table, int write,
- void __user *buffer, size_t *length, loff_t *ppos)
-{
- int rc;
-
- rc = proc_dointvec_minmax(table, write, buffer, length, ppos);
- if (rc)
- return rc;
-
- return 0;
-}
-
int watermark_scale_factor_sysctl_handler(struct ctl_table *table, int write,
void __user *buffer, size_t *length, loff_t *ppos)
{
--
2.26.1
^ permalink raw reply related [flat|nested] 17+ messages in thread
* [PATCH 3/5] sysctl: remove all extern declaration from sysctl.c
2020-04-21 17:15 pass kernel pointers to the sysctl ->proc_handler method v2 Christoph Hellwig
2020-04-21 17:15 ` [PATCH 1/5] bpf-cgroup: remove unused exports Christoph Hellwig
2020-04-21 17:15 ` [PATCH 2/5] mm: remove watermark_boost_factor_sysctl_handler Christoph Hellwig
@ 2020-04-21 17:15 ` Christoph Hellwig
2020-04-22 10:30 ` Vlastimil Babka
2020-04-21 17:15 ` [PATCH 4/5] sysctl: avoid forward declarations Christoph Hellwig
[not found] ` <20200421171539.288622-6-hch@lst.de>
4 siblings, 1 reply; 17+ messages in thread
From: Christoph Hellwig @ 2020-04-21 17:15 UTC (permalink / raw)
To: Kees Cook, Iurii Zaikin
Cc: Alexei Starovoitov, Daniel Borkmann, linux-kernel, linux-mm,
linux-fsdevel, netdev, bpf
Extern declarations in .c files are a bad style and can lead to
mismatches. Use existing definitions in headers where they exist,
and otherwise move the external declarations to suitable header
files.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
include/linux/coredump.h | 6 ++++++
include/linux/file.h | 2 ++
include/linux/mm.h | 2 ++
include/linux/mmzone.h | 2 ++
include/linux/sysctl.h | 8 +++++++
kernel/sysctl.c | 45 +++-------------------------------------
6 files changed, 23 insertions(+), 42 deletions(-)
diff --git a/include/linux/coredump.h b/include/linux/coredump.h
index abf4b4e65dbb..0fe8f3131e97 100644
--- a/include/linux/coredump.h
+++ b/include/linux/coredump.h
@@ -22,4 +22,10 @@ extern void do_coredump(const kernel_siginfo_t *siginfo);
static inline void do_coredump(const kernel_siginfo_t *siginfo) {}
#endif
+extern int core_uses_pid;
+extern char core_pattern[];
+extern unsigned int core_pipe_limit;
+extern int pid_max;
+extern int pid_max_min, pid_max_max;
+
#endif /* _LINUX_COREDUMP_H */
diff --git a/include/linux/file.h b/include/linux/file.h
index 142d102f285e..122f80084a3e 100644
--- a/include/linux/file.h
+++ b/include/linux/file.h
@@ -94,4 +94,6 @@ extern void fd_install(unsigned int fd, struct file *file);
extern void flush_delayed_fput(void);
extern void __fput_sync(struct file *);
+extern unsigned int sysctl_nr_open_min, sysctl_nr_open_max;
+
#endif /* __LINUX_FILE_H */
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 5a323422d783..9c4e7e76dedd 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -3140,5 +3140,7 @@ unsigned long wp_shared_mapping_range(struct address_space *mapping,
pgoff_t first_index, pgoff_t nr);
#endif
+extern int sysctl_nr_trim_pages;
+
#endif /* __KERNEL__ */
#endif /* _LINUX_MM_H */
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index f37bb8f187fc..b2af594ef0f7 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -909,6 +909,7 @@ static inline int is_highmem(struct zone *zone)
/* These two functions are used to setup the per zone pages min values */
struct ctl_table;
+
int min_free_kbytes_sysctl_handler(struct ctl_table *, int,
void __user *, size_t *, loff_t *);
int watermark_scale_factor_sysctl_handler(struct ctl_table *, int,
@@ -925,6 +926,7 @@ int sysctl_min_slab_ratio_sysctl_handler(struct ctl_table *, int,
extern int numa_zonelist_order_handler(struct ctl_table *, int,
void __user *, size_t *, loff_t *);
+extern int percpu_pagelist_fraction;
extern char numa_zonelist_order[];
#define NUMA_ZONELIST_ORDER_LEN 16
diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h
index 02fa84493f23..36143ca40b56 100644
--- a/include/linux/sysctl.h
+++ b/include/linux/sysctl.h
@@ -207,7 +207,15 @@ void unregister_sysctl_table(struct ctl_table_header * table);
extern int sysctl_init(void);
+extern int pwrsw_enabled;
+extern int unaligned_enabled;
+extern int unaligned_dump_stack;
+extern int no_unaligned_warning;
+
extern struct ctl_table sysctl_mount_point[];
+extern struct ctl_table random_table[];
+extern struct ctl_table firmware_config_table[];
+extern struct ctl_table epoll_table[];
#else /* CONFIG_SYSCTL */
static inline struct ctl_table_header *register_sysctl_table(struct ctl_table * table)
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 99d27acf4646..31b934865ebc 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -68,6 +68,9 @@
#include <linux/bpf.h>
#include <linux/mount.h>
#include <linux/userfaultfd_k.h>
+#include <linux/coredump.h>
+#include <linux/latencytop.h>
+#include <linux/pid.h>
#include "../lib/kstrtox.h"
@@ -103,22 +106,6 @@
#if defined(CONFIG_SYSCTL)
-/* External variables not in a header file. */
-extern int suid_dumpable;
-#ifdef CONFIG_COREDUMP
-extern int core_uses_pid;
-extern char core_pattern[];
-extern unsigned int core_pipe_limit;
-#endif
-extern int pid_max;
-extern int pid_max_min, pid_max_max;
-extern int percpu_pagelist_fraction;
-extern int latencytop_enabled;
-extern unsigned int sysctl_nr_open_min, sysctl_nr_open_max;
-#ifndef CONFIG_MMU
-extern int sysctl_nr_trim_pages;
-#endif
-
/* Constants used for minimum and maximum */
#ifdef CONFIG_LOCKUP_DETECTOR
static int sixty = 60;
@@ -160,24 +147,6 @@ static unsigned long hung_task_timeout_max = (LONG_MAX/HZ);
#ifdef CONFIG_INOTIFY_USER
#include <linux/inotify.h>
#endif
-#ifdef CONFIG_SPARC
-#endif
-
-#ifdef CONFIG_PARISC
-extern int pwrsw_enabled;
-#endif
-
-#ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW
-extern int unaligned_enabled;
-#endif
-
-#ifdef CONFIG_IA64
-extern int unaligned_dump_stack;
-#endif
-
-#ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN
-extern int no_unaligned_warning;
-#endif
#ifdef CONFIG_PROC_SYSCTL
@@ -243,14 +212,6 @@ static struct ctl_table vm_table[];
static struct ctl_table fs_table[];
static struct ctl_table debug_table[];
static struct ctl_table dev_table[];
-extern struct ctl_table random_table[];
-#ifdef CONFIG_EPOLL
-extern struct ctl_table epoll_table[];
-#endif
-
-#ifdef CONFIG_FW_LOADER_USER_HELPER
-extern struct ctl_table firmware_config_table[];
-#endif
#if defined(HAVE_ARCH_PICK_MMAP_LAYOUT) || \
defined(CONFIG_ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT)
--
2.26.1
^ permalink raw reply related [flat|nested] 17+ messages in thread
* [PATCH 4/5] sysctl: avoid forward declarations
2020-04-21 17:15 pass kernel pointers to the sysctl ->proc_handler method v2 Christoph Hellwig
` (2 preceding siblings ...)
2020-04-21 17:15 ` [PATCH 3/5] sysctl: remove all extern declaration from sysctl.c Christoph Hellwig
@ 2020-04-21 17:15 ` Christoph Hellwig
[not found] ` <20200421171539.288622-6-hch@lst.de>
4 siblings, 0 replies; 17+ messages in thread
From: Christoph Hellwig @ 2020-04-21 17:15 UTC (permalink / raw)
To: Kees Cook, Iurii Zaikin
Cc: Alexei Starovoitov, Daniel Borkmann, linux-kernel, linux-mm,
linux-fsdevel, netdev, bpf
Move the sysctl tables to the end of the file to avoid lots of pointless
forward declarations.
Signed-off-by: Christoph Hellwig <hch@lst.de>
---
kernel/sysctl.c | 3565 +++++++++++++++++++++++------------------------
1 file changed, 1764 insertions(+), 1801 deletions(-)
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
index 31b934865ebc..511543d23879 100644
--- a/kernel/sysctl.c
+++ b/kernel/sysctl.c
@@ -176,79 +176,13 @@ enum sysctl_writes_mode {
};
static enum sysctl_writes_mode sysctl_writes_strict = SYSCTL_WRITES_STRICT;
-
-static int proc_do_cad_pid(struct ctl_table *table, int write,
- void __user *buffer, size_t *lenp, loff_t *ppos);
-static int proc_taint(struct ctl_table *table, int write,
- void __user *buffer, size_t *lenp, loff_t *ppos);
-#ifdef CONFIG_COMPACTION
-static int proc_dointvec_minmax_warn_RT_change(struct ctl_table *table,
- int write, void __user *buffer,
- size_t *lenp, loff_t *ppos);
-#endif
-#endif
-
-#ifdef CONFIG_PRINTK
-static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write,
- void __user *buffer, size_t *lenp, loff_t *ppos);
-#endif
-
-static int proc_dointvec_minmax_coredump(struct ctl_table *table, int write,
- void __user *buffer, size_t *lenp, loff_t *ppos);
-#ifdef CONFIG_COREDUMP
-static int proc_dostring_coredump(struct ctl_table *table, int write,
- void __user *buffer, size_t *lenp, loff_t *ppos);
-#endif
-static int proc_dopipe_max_size(struct ctl_table *table, int write,
- void __user *buffer, size_t *lenp, loff_t *ppos);
-
-#ifdef CONFIG_MAGIC_SYSRQ
-static int sysrq_sysctl_handler(struct ctl_table *table, int write,
- void __user *buffer, size_t *lenp, loff_t *ppos);
-#endif
-
-static struct ctl_table kern_table[];
-static struct ctl_table vm_table[];
-static struct ctl_table fs_table[];
-static struct ctl_table debug_table[];
-static struct ctl_table dev_table[];
+#endif /* CONFIG_PROC_SYSCTL */
#if defined(HAVE_ARCH_PICK_MMAP_LAYOUT) || \
defined(CONFIG_ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT)
int sysctl_legacy_va_layout;
#endif
-/* The default sysctl tables: */
-
-static struct ctl_table sysctl_base_table[] = {
- {
- .procname = "kernel",
- .mode = 0555,
- .child = kern_table,
- },
- {
- .procname = "vm",
- .mode = 0555,
- .child = vm_table,
- },
- {
- .procname = "fs",
- .mode = 0555,
- .child = fs_table,
- },
- {
- .procname = "debug",
- .mode = 0555,
- .child = debug_table,
- },
- {
- .procname = "dev",
- .mode = 0555,
- .child = dev_table,
- },
- { }
-};
-
#ifdef CONFIG_SCHED_DEBUG
static int min_sched_granularity_ns = 100000; /* 100 usecs */
static int max_sched_granularity_ns = NSEC_PER_SEC; /* 1 second */
@@ -265,1676 +199,12 @@ static int min_extfrag_threshold;
static int max_extfrag_threshold = 1000;
#endif
-static struct ctl_table kern_table[] = {
- {
- .procname = "sched_child_runs_first",
- .data = &sysctl_sched_child_runs_first,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
-#ifdef CONFIG_SCHED_DEBUG
- {
- .procname = "sched_min_granularity_ns",
- .data = &sysctl_sched_min_granularity,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = sched_proc_update_handler,
- .extra1 = &min_sched_granularity_ns,
- .extra2 = &max_sched_granularity_ns,
- },
- {
- .procname = "sched_latency_ns",
- .data = &sysctl_sched_latency,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = sched_proc_update_handler,
- .extra1 = &min_sched_granularity_ns,
- .extra2 = &max_sched_granularity_ns,
- },
- {
- .procname = "sched_wakeup_granularity_ns",
- .data = &sysctl_sched_wakeup_granularity,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = sched_proc_update_handler,
- .extra1 = &min_wakeup_granularity_ns,
- .extra2 = &max_wakeup_granularity_ns,
- },
-#ifdef CONFIG_SMP
- {
- .procname = "sched_tunable_scaling",
- .data = &sysctl_sched_tunable_scaling,
- .maxlen = sizeof(enum sched_tunable_scaling),
- .mode = 0644,
- .proc_handler = sched_proc_update_handler,
- .extra1 = &min_sched_tunable_scaling,
- .extra2 = &max_sched_tunable_scaling,
- },
- {
- .procname = "sched_migration_cost_ns",
- .data = &sysctl_sched_migration_cost,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
- {
- .procname = "sched_nr_migrate",
- .data = &sysctl_sched_nr_migrate,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
-#ifdef CONFIG_SCHEDSTATS
- {
- .procname = "sched_schedstats",
- .data = NULL,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = sysctl_schedstats,
- .extra1 = SYSCTL_ZERO,
- .extra2 = SYSCTL_ONE,
- },
-#endif /* CONFIG_SCHEDSTATS */
-#endif /* CONFIG_SMP */
-#ifdef CONFIG_NUMA_BALANCING
- {
- .procname = "numa_balancing_scan_delay_ms",
- .data = &sysctl_numa_balancing_scan_delay,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
- {
- .procname = "numa_balancing_scan_period_min_ms",
- .data = &sysctl_numa_balancing_scan_period_min,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
- {
- .procname = "numa_balancing_scan_period_max_ms",
- .data = &sysctl_numa_balancing_scan_period_max,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
- {
- .procname = "numa_balancing_scan_size_mb",
- .data = &sysctl_numa_balancing_scan_size,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = SYSCTL_ONE,
- },
- {
- .procname = "numa_balancing",
- .data = NULL, /* filled in by handler */
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = sysctl_numa_balancing,
- .extra1 = SYSCTL_ZERO,
- .extra2 = SYSCTL_ONE,
- },
-#endif /* CONFIG_NUMA_BALANCING */
-#endif /* CONFIG_SCHED_DEBUG */
- {
- .procname = "sched_rt_period_us",
- .data = &sysctl_sched_rt_period,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = sched_rt_handler,
- },
- {
- .procname = "sched_rt_runtime_us",
- .data = &sysctl_sched_rt_runtime,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = sched_rt_handler,
- },
- {
- .procname = "sched_rr_timeslice_ms",
- .data = &sysctl_sched_rr_timeslice,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = sched_rr_handler,
- },
-#ifdef CONFIG_UCLAMP_TASK
- {
- .procname = "sched_util_clamp_min",
- .data = &sysctl_sched_uclamp_util_min,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = sysctl_sched_uclamp_handler,
- },
- {
- .procname = "sched_util_clamp_max",
- .data = &sysctl_sched_uclamp_util_max,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = sysctl_sched_uclamp_handler,
- },
-#endif
-#ifdef CONFIG_SCHED_AUTOGROUP
- {
- .procname = "sched_autogroup_enabled",
- .data = &sysctl_sched_autogroup_enabled,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = SYSCTL_ZERO,
- .extra2 = SYSCTL_ONE,
- },
-#endif
-#ifdef CONFIG_CFS_BANDWIDTH
- {
- .procname = "sched_cfs_bandwidth_slice_us",
- .data = &sysctl_sched_cfs_bandwidth_slice,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = SYSCTL_ONE,
- },
-#endif
-#if defined(CONFIG_ENERGY_MODEL) && defined(CONFIG_CPU_FREQ_GOV_SCHEDUTIL)
- {
- .procname = "sched_energy_aware",
- .data = &sysctl_sched_energy_aware,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = sched_energy_aware_handler,
- .extra1 = SYSCTL_ZERO,
- .extra2 = SYSCTL_ONE,
- },
-#endif
-#ifdef CONFIG_PROVE_LOCKING
- {
- .procname = "prove_locking",
- .data = &prove_locking,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
-#endif
-#ifdef CONFIG_LOCK_STAT
- {
- .procname = "lock_stat",
- .data = &lock_stat,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
-#endif
- {
- .procname = "panic",
- .data = &panic_timeout,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
-#ifdef CONFIG_COREDUMP
- {
- .procname = "core_uses_pid",
- .data = &core_uses_pid,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
- {
- .procname = "core_pattern",
- .data = core_pattern,
- .maxlen = CORENAME_MAX_SIZE,
- .mode = 0644,
- .proc_handler = proc_dostring_coredump,
- },
- {
- .procname = "core_pipe_limit",
- .data = &core_pipe_limit,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
-#endif
-#ifdef CONFIG_PROC_SYSCTL
- {
- .procname = "tainted",
- .maxlen = sizeof(long),
- .mode = 0644,
- .proc_handler = proc_taint,
- },
- {
- .procname = "sysctl_writes_strict",
- .data = &sysctl_writes_strict,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &neg_one,
- .extra2 = SYSCTL_ONE,
- },
-#endif
-#ifdef CONFIG_LATENCYTOP
- {
- .procname = "latencytop",
- .data = &latencytop_enabled,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = sysctl_latencytop,
- },
-#endif
-#ifdef CONFIG_BLK_DEV_INITRD
- {
- .procname = "real-root-dev",
- .data = &real_root_dev,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
-#endif
- {
- .procname = "print-fatal-signals",
- .data = &print_fatal_signals,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
-#ifdef CONFIG_SPARC
- {
- .procname = "reboot-cmd",
- .data = reboot_command,
- .maxlen = 256,
- .mode = 0644,
- .proc_handler = proc_dostring,
- },
- {
- .procname = "stop-a",
- .data = &stop_a_enabled,
- .maxlen = sizeof (int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
- {
- .procname = "scons-poweroff",
- .data = &scons_pwroff,
- .maxlen = sizeof (int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
-#endif
-#ifdef CONFIG_SPARC64
- {
- .procname = "tsb-ratio",
- .data = &sysctl_tsb_ratio,
- .maxlen = sizeof (int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
-#endif
-#ifdef CONFIG_PARISC
- {
- .procname = "soft-power",
- .data = &pwrsw_enabled,
- .maxlen = sizeof (int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
-#endif
-#ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW
- {
- .procname = "unaligned-trap",
- .data = &unaligned_enabled,
- .maxlen = sizeof (int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
-#endif
- {
- .procname = "ctrl-alt-del",
- .data = &C_A_D,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
-#ifdef CONFIG_FUNCTION_TRACER
- {
- .procname = "ftrace_enabled",
- .data = &ftrace_enabled,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = ftrace_enable_sysctl,
- },
-#endif
-#ifdef CONFIG_STACK_TRACER
- {
- .procname = "stack_tracer_enabled",
- .data = &stack_tracer_enabled,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = stack_trace_sysctl,
- },
-#endif
-#ifdef CONFIG_TRACING
- {
- .procname = "ftrace_dump_on_oops",
- .data = &ftrace_dump_on_oops,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
- {
- .procname = "traceoff_on_warning",
- .data = &__disable_trace_on_warning,
- .maxlen = sizeof(__disable_trace_on_warning),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
- {
- .procname = "tracepoint_printk",
- .data = &tracepoint_printk,
- .maxlen = sizeof(tracepoint_printk),
- .mode = 0644,
- .proc_handler = tracepoint_printk_sysctl,
- },
-#endif
-#ifdef CONFIG_KEXEC_CORE
- {
- .procname = "kexec_load_disabled",
- .data = &kexec_load_disabled,
- .maxlen = sizeof(int),
- .mode = 0644,
- /* only handle a transition from default "0" to "1" */
- .proc_handler = proc_dointvec_minmax,
- .extra1 = SYSCTL_ONE,
- .extra2 = SYSCTL_ONE,
- },
-#endif
-#ifdef CONFIG_MODULES
- {
- .procname = "modprobe",
- .data = &modprobe_path,
- .maxlen = KMOD_PATH_LEN,
- .mode = 0644,
- .proc_handler = proc_dostring,
- },
- {
- .procname = "modules_disabled",
- .data = &modules_disabled,
- .maxlen = sizeof(int),
- .mode = 0644,
- /* only handle a transition from default "0" to "1" */
- .proc_handler = proc_dointvec_minmax,
- .extra1 = SYSCTL_ONE,
- .extra2 = SYSCTL_ONE,
- },
-#endif
-#ifdef CONFIG_UEVENT_HELPER
- {
- .procname = "hotplug",
- .data = &uevent_helper,
- .maxlen = UEVENT_HELPER_PATH_LEN,
- .mode = 0644,
- .proc_handler = proc_dostring,
- },
-#endif
-#ifdef CONFIG_CHR_DEV_SG
- {
- .procname = "sg-big-buff",
- .data = &sg_big_buff,
- .maxlen = sizeof (int),
- .mode = 0444,
- .proc_handler = proc_dointvec,
- },
-#endif
-#ifdef CONFIG_BSD_PROCESS_ACCT
- {
- .procname = "acct",
- .data = &acct_parm,
- .maxlen = 3*sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
-#endif
-#ifdef CONFIG_MAGIC_SYSRQ
- {
- .procname = "sysrq",
- .data = NULL,
- .maxlen = sizeof (int),
- .mode = 0644,
- .proc_handler = sysrq_sysctl_handler,
- },
-#endif
-#ifdef CONFIG_PROC_SYSCTL
- {
- .procname = "cad_pid",
- .data = NULL,
- .maxlen = sizeof (int),
- .mode = 0600,
- .proc_handler = proc_do_cad_pid,
- },
-#endif
- {
- .procname = "threads-max",
- .data = NULL,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = sysctl_max_threads,
- },
- {
- .procname = "random",
- .mode = 0555,
- .child = random_table,
- },
- {
- .procname = "usermodehelper",
- .mode = 0555,
- .child = usermodehelper_table,
- },
-#ifdef CONFIG_FW_LOADER_USER_HELPER
- {
- .procname = "firmware_config",
- .mode = 0555,
- .child = firmware_config_table,
- },
-#endif
- {
- .procname = "overflowuid",
- .data = &overflowuid,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &minolduid,
- .extra2 = &maxolduid,
- },
- {
- .procname = "overflowgid",
- .data = &overflowgid,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &minolduid,
- .extra2 = &maxolduid,
- },
-#ifdef CONFIG_S390
- {
- .procname = "userprocess_debug",
- .data = &show_unhandled_signals,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
-#endif
- {
- .procname = "pid_max",
- .data = &pid_max,
- .maxlen = sizeof (int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &pid_max_min,
- .extra2 = &pid_max_max,
- },
- {
- .procname = "panic_on_oops",
- .data = &panic_on_oops,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
- {
- .procname = "panic_print",
- .data = &panic_print,
- .maxlen = sizeof(unsigned long),
- .mode = 0644,
- .proc_handler = proc_doulongvec_minmax,
- },
-#if defined CONFIG_PRINTK
- {
- .procname = "printk",
- .data = &console_loglevel,
- .maxlen = 4*sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
- {
- .procname = "printk_ratelimit",
- .data = &printk_ratelimit_state.interval,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_jiffies,
- },
- {
- .procname = "printk_ratelimit_burst",
- .data = &printk_ratelimit_state.burst,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
- {
- .procname = "printk_delay",
- .data = &printk_delay_msec,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = SYSCTL_ZERO,
- .extra2 = &ten_thousand,
- },
- {
- .procname = "printk_devkmsg",
- .data = devkmsg_log_str,
- .maxlen = DEVKMSG_STR_MAX_SIZE,
- .mode = 0644,
- .proc_handler = devkmsg_sysctl_set_loglvl,
- },
- {
- .procname = "dmesg_restrict",
- .data = &dmesg_restrict,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax_sysadmin,
- .extra1 = SYSCTL_ZERO,
- .extra2 = SYSCTL_ONE,
- },
- {
- .procname = "kptr_restrict",
- .data = &kptr_restrict,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax_sysadmin,
- .extra1 = SYSCTL_ZERO,
- .extra2 = &two,
- },
-#endif
- {
- .procname = "ngroups_max",
- .data = &ngroups_max,
- .maxlen = sizeof (int),
- .mode = 0444,
- .proc_handler = proc_dointvec,
- },
- {
- .procname = "cap_last_cap",
- .data = (void *)&cap_last_cap,
- .maxlen = sizeof(int),
- .mode = 0444,
- .proc_handler = proc_dointvec,
- },
-#if defined(CONFIG_LOCKUP_DETECTOR)
- {
- .procname = "watchdog",
- .data = &watchdog_user_enabled,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_watchdog,
- .extra1 = SYSCTL_ZERO,
- .extra2 = SYSCTL_ONE,
- },
- {
- .procname = "watchdog_thresh",
- .data = &watchdog_thresh,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_watchdog_thresh,
- .extra1 = SYSCTL_ZERO,
- .extra2 = &sixty,
- },
- {
- .procname = "nmi_watchdog",
- .data = &nmi_watchdog_user_enabled,
- .maxlen = sizeof(int),
- .mode = NMI_WATCHDOG_SYSCTL_PERM,
- .proc_handler = proc_nmi_watchdog,
- .extra1 = SYSCTL_ZERO,
- .extra2 = SYSCTL_ONE,
- },
- {
- .procname = "watchdog_cpumask",
- .data = &watchdog_cpumask_bits,
- .maxlen = NR_CPUS,
- .mode = 0644,
- .proc_handler = proc_watchdog_cpumask,
- },
-#ifdef CONFIG_SOFTLOCKUP_DETECTOR
- {
- .procname = "soft_watchdog",
- .data = &soft_watchdog_user_enabled,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_soft_watchdog,
- .extra1 = SYSCTL_ZERO,
- .extra2 = SYSCTL_ONE,
- },
- {
- .procname = "softlockup_panic",
- .data = &softlockup_panic,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = SYSCTL_ZERO,
- .extra2 = SYSCTL_ONE,
- },
-#ifdef CONFIG_SMP
- {
- .procname = "softlockup_all_cpu_backtrace",
- .data = &sysctl_softlockup_all_cpu_backtrace,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = SYSCTL_ZERO,
- .extra2 = SYSCTL_ONE,
- },
-#endif /* CONFIG_SMP */
-#endif
-#ifdef CONFIG_HARDLOCKUP_DETECTOR
- {
- .procname = "hardlockup_panic",
- .data = &hardlockup_panic,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = SYSCTL_ZERO,
- .extra2 = SYSCTL_ONE,
- },
-#ifdef CONFIG_SMP
- {
- .procname = "hardlockup_all_cpu_backtrace",
- .data = &sysctl_hardlockup_all_cpu_backtrace,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = SYSCTL_ZERO,
- .extra2 = SYSCTL_ONE,
- },
-#endif /* CONFIG_SMP */
-#endif
-#endif
-
-#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86)
- {
- .procname = "unknown_nmi_panic",
- .data = &unknown_nmi_panic,
- .maxlen = sizeof (int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
-#endif
-#if defined(CONFIG_X86)
- {
- .procname = "panic_on_unrecovered_nmi",
- .data = &panic_on_unrecovered_nmi,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
- {
- .procname = "panic_on_io_nmi",
- .data = &panic_on_io_nmi,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
-#ifdef CONFIG_DEBUG_STACKOVERFLOW
- {
- .procname = "panic_on_stackoverflow",
- .data = &sysctl_panic_on_stackoverflow,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
-#endif
- {
- .procname = "bootloader_type",
- .data = &bootloader_type,
- .maxlen = sizeof (int),
- .mode = 0444,
- .proc_handler = proc_dointvec,
- },
- {
- .procname = "bootloader_version",
- .data = &bootloader_version,
- .maxlen = sizeof (int),
- .mode = 0444,
- .proc_handler = proc_dointvec,
- },
- {
- .procname = "io_delay_type",
- .data = &io_delay_type,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
-#endif
-#if defined(CONFIG_MMU)
- {
- .procname = "randomize_va_space",
- .data = &randomize_va_space,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
-#endif
-#if defined(CONFIG_S390) && defined(CONFIG_SMP)
- {
- .procname = "spin_retry",
- .data = &spin_retry,
- .maxlen = sizeof (int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
-#endif
-#if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86)
- {
- .procname = "acpi_video_flags",
- .data = &acpi_realmode_flags,
- .maxlen = sizeof (unsigned long),
- .mode = 0644,
- .proc_handler = proc_doulongvec_minmax,
- },
-#endif
-#ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN
- {
- .procname = "ignore-unaligned-usertrap",
- .data = &no_unaligned_warning,
- .maxlen = sizeof (int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
-#endif
-#ifdef CONFIG_IA64
- {
- .procname = "unaligned-dump-stack",
- .data = &unaligned_dump_stack,
- .maxlen = sizeof (int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
-#endif
-#ifdef CONFIG_DETECT_HUNG_TASK
- {
- .procname = "hung_task_panic",
- .data = &sysctl_hung_task_panic,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = SYSCTL_ZERO,
- .extra2 = SYSCTL_ONE,
- },
- {
- .procname = "hung_task_check_count",
- .data = &sysctl_hung_task_check_count,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = SYSCTL_ZERO,
- },
- {
- .procname = "hung_task_timeout_secs",
- .data = &sysctl_hung_task_timeout_secs,
- .maxlen = sizeof(unsigned long),
- .mode = 0644,
- .proc_handler = proc_dohung_task_timeout_secs,
- .extra2 = &hung_task_timeout_max,
- },
- {
- .procname = "hung_task_check_interval_secs",
- .data = &sysctl_hung_task_check_interval_secs,
- .maxlen = sizeof(unsigned long),
- .mode = 0644,
- .proc_handler = proc_dohung_task_timeout_secs,
- .extra2 = &hung_task_timeout_max,
- },
- {
- .procname = "hung_task_warnings",
- .data = &sysctl_hung_task_warnings,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &neg_one,
- },
-#endif
-#ifdef CONFIG_RT_MUTEXES
- {
- .procname = "max_lock_depth",
- .data = &max_lock_depth,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
-#endif
- {
- .procname = "poweroff_cmd",
- .data = &poweroff_cmd,
- .maxlen = POWEROFF_CMD_PATH_LEN,
- .mode = 0644,
- .proc_handler = proc_dostring,
- },
-#ifdef CONFIG_KEYS
- {
- .procname = "keys",
- .mode = 0555,
- .child = key_sysctls,
- },
-#endif
-#ifdef CONFIG_PERF_EVENTS
- /*
- * User-space scripts rely on the existence of this file
- * as a feature check for perf_events being enabled.
- *
- * So it's an ABI, do not remove!
- */
- {
- .procname = "perf_event_paranoid",
- .data = &sysctl_perf_event_paranoid,
- .maxlen = sizeof(sysctl_perf_event_paranoid),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
- {
- .procname = "perf_event_mlock_kb",
- .data = &sysctl_perf_event_mlock,
- .maxlen = sizeof(sysctl_perf_event_mlock),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
- {
- .procname = "perf_event_max_sample_rate",
- .data = &sysctl_perf_event_sample_rate,
- .maxlen = sizeof(sysctl_perf_event_sample_rate),
- .mode = 0644,
- .proc_handler = perf_proc_update_handler,
- .extra1 = SYSCTL_ONE,
- },
- {
- .procname = "perf_cpu_time_max_percent",
- .data = &sysctl_perf_cpu_time_max_percent,
- .maxlen = sizeof(sysctl_perf_cpu_time_max_percent),
- .mode = 0644,
- .proc_handler = perf_cpu_time_max_percent_handler,
- .extra1 = SYSCTL_ZERO,
- .extra2 = &one_hundred,
- },
- {
- .procname = "perf_event_max_stack",
- .data = &sysctl_perf_event_max_stack,
- .maxlen = sizeof(sysctl_perf_event_max_stack),
- .mode = 0644,
- .proc_handler = perf_event_max_stack_handler,
- .extra1 = SYSCTL_ZERO,
- .extra2 = &six_hundred_forty_kb,
- },
- {
- .procname = "perf_event_max_contexts_per_stack",
- .data = &sysctl_perf_event_max_contexts_per_stack,
- .maxlen = sizeof(sysctl_perf_event_max_contexts_per_stack),
- .mode = 0644,
- .proc_handler = perf_event_max_stack_handler,
- .extra1 = SYSCTL_ZERO,
- .extra2 = &one_thousand,
- },
-#endif
- {
- .procname = "panic_on_warn",
- .data = &panic_on_warn,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = SYSCTL_ZERO,
- .extra2 = SYSCTL_ONE,
- },
-#if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ_COMMON)
- {
- .procname = "timer_migration",
- .data = &sysctl_timer_migration,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = timer_migration_handler,
- .extra1 = SYSCTL_ZERO,
- .extra2 = SYSCTL_ONE,
- },
-#endif
-#ifdef CONFIG_BPF_SYSCALL
- {
- .procname = "unprivileged_bpf_disabled",
- .data = &sysctl_unprivileged_bpf_disabled,
- .maxlen = sizeof(sysctl_unprivileged_bpf_disabled),
- .mode = 0644,
- /* only handle a transition from default "0" to "1" */
- .proc_handler = proc_dointvec_minmax,
- .extra1 = SYSCTL_ONE,
- .extra2 = SYSCTL_ONE,
- },
- {
- .procname = "bpf_stats_enabled",
- .data = &bpf_stats_enabled_key.key,
- .maxlen = sizeof(bpf_stats_enabled_key),
- .mode = 0644,
- .proc_handler = proc_do_static_key,
- },
-#endif
-#if defined(CONFIG_TREE_RCU)
- {
- .procname = "panic_on_rcu_stall",
- .data = &sysctl_panic_on_rcu_stall,
- .maxlen = sizeof(sysctl_panic_on_rcu_stall),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = SYSCTL_ZERO,
- .extra2 = SYSCTL_ONE,
- },
-#endif
-#ifdef CONFIG_STACKLEAK_RUNTIME_DISABLE
- {
- .procname = "stack_erasing",
- .data = NULL,
- .maxlen = sizeof(int),
- .mode = 0600,
- .proc_handler = stack_erasing_sysctl,
- .extra1 = SYSCTL_ZERO,
- .extra2 = SYSCTL_ONE,
- },
-#endif
- { }
-};
-
-static struct ctl_table vm_table[] = {
- {
- .procname = "overcommit_memory",
- .data = &sysctl_overcommit_memory,
- .maxlen = sizeof(sysctl_overcommit_memory),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = SYSCTL_ZERO,
- .extra2 = &two,
- },
- {
- .procname = "panic_on_oom",
- .data = &sysctl_panic_on_oom,
- .maxlen = sizeof(sysctl_panic_on_oom),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = SYSCTL_ZERO,
- .extra2 = &two,
- },
- {
- .procname = "oom_kill_allocating_task",
- .data = &sysctl_oom_kill_allocating_task,
- .maxlen = sizeof(sysctl_oom_kill_allocating_task),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
- {
- .procname = "oom_dump_tasks",
- .data = &sysctl_oom_dump_tasks,
- .maxlen = sizeof(sysctl_oom_dump_tasks),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
- {
- .procname = "overcommit_ratio",
- .data = &sysctl_overcommit_ratio,
- .maxlen = sizeof(sysctl_overcommit_ratio),
- .mode = 0644,
- .proc_handler = overcommit_ratio_handler,
- },
- {
- .procname = "overcommit_kbytes",
- .data = &sysctl_overcommit_kbytes,
- .maxlen = sizeof(sysctl_overcommit_kbytes),
- .mode = 0644,
- .proc_handler = overcommit_kbytes_handler,
- },
- {
- .procname = "page-cluster",
- .data = &page_cluster,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = SYSCTL_ZERO,
- },
- {
- .procname = "dirty_background_ratio",
- .data = &dirty_background_ratio,
- .maxlen = sizeof(dirty_background_ratio),
- .mode = 0644,
- .proc_handler = dirty_background_ratio_handler,
- .extra1 = SYSCTL_ZERO,
- .extra2 = &one_hundred,
- },
- {
- .procname = "dirty_background_bytes",
- .data = &dirty_background_bytes,
- .maxlen = sizeof(dirty_background_bytes),
- .mode = 0644,
- .proc_handler = dirty_background_bytes_handler,
- .extra1 = &one_ul,
- },
- {
- .procname = "dirty_ratio",
- .data = &vm_dirty_ratio,
- .maxlen = sizeof(vm_dirty_ratio),
- .mode = 0644,
- .proc_handler = dirty_ratio_handler,
- .extra1 = SYSCTL_ZERO,
- .extra2 = &one_hundred,
- },
- {
- .procname = "dirty_bytes",
- .data = &vm_dirty_bytes,
- .maxlen = sizeof(vm_dirty_bytes),
- .mode = 0644,
- .proc_handler = dirty_bytes_handler,
- .extra1 = &dirty_bytes_min,
- },
- {
- .procname = "dirty_writeback_centisecs",
- .data = &dirty_writeback_interval,
- .maxlen = sizeof(dirty_writeback_interval),
- .mode = 0644,
- .proc_handler = dirty_writeback_centisecs_handler,
- },
- {
- .procname = "dirty_expire_centisecs",
- .data = &dirty_expire_interval,
- .maxlen = sizeof(dirty_expire_interval),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = SYSCTL_ZERO,
- },
- {
- .procname = "dirtytime_expire_seconds",
- .data = &dirtytime_expire_interval,
- .maxlen = sizeof(dirtytime_expire_interval),
- .mode = 0644,
- .proc_handler = dirtytime_interval_handler,
- .extra1 = SYSCTL_ZERO,
- },
- {
- .procname = "swappiness",
- .data = &vm_swappiness,
- .maxlen = sizeof(vm_swappiness),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = SYSCTL_ZERO,
- .extra2 = &one_hundred,
- },
-#ifdef CONFIG_HUGETLB_PAGE
- {
- .procname = "nr_hugepages",
- .data = NULL,
- .maxlen = sizeof(unsigned long),
- .mode = 0644,
- .proc_handler = hugetlb_sysctl_handler,
- },
-#ifdef CONFIG_NUMA
- {
- .procname = "nr_hugepages_mempolicy",
- .data = NULL,
- .maxlen = sizeof(unsigned long),
- .mode = 0644,
- .proc_handler = &hugetlb_mempolicy_sysctl_handler,
- },
- {
- .procname = "numa_stat",
- .data = &sysctl_vm_numa_stat,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = sysctl_vm_numa_stat_handler,
- .extra1 = SYSCTL_ZERO,
- .extra2 = SYSCTL_ONE,
- },
-#endif
- {
- .procname = "hugetlb_shm_group",
- .data = &sysctl_hugetlb_shm_group,
- .maxlen = sizeof(gid_t),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
- {
- .procname = "nr_overcommit_hugepages",
- .data = NULL,
- .maxlen = sizeof(unsigned long),
- .mode = 0644,
- .proc_handler = hugetlb_overcommit_handler,
- },
-#endif
- {
- .procname = "lowmem_reserve_ratio",
- .data = &sysctl_lowmem_reserve_ratio,
- .maxlen = sizeof(sysctl_lowmem_reserve_ratio),
- .mode = 0644,
- .proc_handler = lowmem_reserve_ratio_sysctl_handler,
- },
- {
- .procname = "drop_caches",
- .data = &sysctl_drop_caches,
- .maxlen = sizeof(int),
- .mode = 0200,
- .proc_handler = drop_caches_sysctl_handler,
- .extra1 = SYSCTL_ONE,
- .extra2 = &four,
- },
-#ifdef CONFIG_COMPACTION
- {
- .procname = "compact_memory",
- .data = &sysctl_compact_memory,
- .maxlen = sizeof(int),
- .mode = 0200,
- .proc_handler = sysctl_compaction_handler,
- },
- {
- .procname = "extfrag_threshold",
- .data = &sysctl_extfrag_threshold,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &min_extfrag_threshold,
- .extra2 = &max_extfrag_threshold,
- },
- {
- .procname = "compact_unevictable_allowed",
- .data = &sysctl_compact_unevictable_allowed,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax_warn_RT_change,
- .extra1 = SYSCTL_ZERO,
- .extra2 = SYSCTL_ONE,
- },
-
-#endif /* CONFIG_COMPACTION */
- {
- .procname = "min_free_kbytes",
- .data = &min_free_kbytes,
- .maxlen = sizeof(min_free_kbytes),
- .mode = 0644,
- .proc_handler = min_free_kbytes_sysctl_handler,
- .extra1 = SYSCTL_ZERO,
- },
- {
- .procname = "watermark_boost_factor",
- .data = &watermark_boost_factor,
- .maxlen = sizeof(watermark_boost_factor),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = SYSCTL_ZERO,
- },
- {
- .procname = "watermark_scale_factor",
- .data = &watermark_scale_factor,
- .maxlen = sizeof(watermark_scale_factor),
- .mode = 0644,
- .proc_handler = watermark_scale_factor_sysctl_handler,
- .extra1 = SYSCTL_ONE,
- .extra2 = &one_thousand,
- },
- {
- .procname = "percpu_pagelist_fraction",
- .data = &percpu_pagelist_fraction,
- .maxlen = sizeof(percpu_pagelist_fraction),
- .mode = 0644,
- .proc_handler = percpu_pagelist_fraction_sysctl_handler,
- .extra1 = SYSCTL_ZERO,
- },
-#ifdef CONFIG_MMU
- {
- .procname = "max_map_count",
- .data = &sysctl_max_map_count,
- .maxlen = sizeof(sysctl_max_map_count),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = SYSCTL_ZERO,
- },
-#else
- {
- .procname = "nr_trim_pages",
- .data = &sysctl_nr_trim_pages,
- .maxlen = sizeof(sysctl_nr_trim_pages),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = SYSCTL_ZERO,
- },
-#endif
- {
- .procname = "laptop_mode",
- .data = &laptop_mode,
- .maxlen = sizeof(laptop_mode),
- .mode = 0644,
- .proc_handler = proc_dointvec_jiffies,
- },
- {
- .procname = "block_dump",
- .data = &block_dump,
- .maxlen = sizeof(block_dump),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- .extra1 = SYSCTL_ZERO,
- },
- {
- .procname = "vfs_cache_pressure",
- .data = &sysctl_vfs_cache_pressure,
- .maxlen = sizeof(sysctl_vfs_cache_pressure),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- .extra1 = SYSCTL_ZERO,
- },
-#if defined(HAVE_ARCH_PICK_MMAP_LAYOUT) || \
- defined(CONFIG_ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT)
- {
- .procname = "legacy_va_layout",
- .data = &sysctl_legacy_va_layout,
- .maxlen = sizeof(sysctl_legacy_va_layout),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- .extra1 = SYSCTL_ZERO,
- },
-#endif
-#ifdef CONFIG_NUMA
- {
- .procname = "zone_reclaim_mode",
- .data = &node_reclaim_mode,
- .maxlen = sizeof(node_reclaim_mode),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- .extra1 = SYSCTL_ZERO,
- },
- {
- .procname = "min_unmapped_ratio",
- .data = &sysctl_min_unmapped_ratio,
- .maxlen = sizeof(sysctl_min_unmapped_ratio),
- .mode = 0644,
- .proc_handler = sysctl_min_unmapped_ratio_sysctl_handler,
- .extra1 = SYSCTL_ZERO,
- .extra2 = &one_hundred,
- },
- {
- .procname = "min_slab_ratio",
- .data = &sysctl_min_slab_ratio,
- .maxlen = sizeof(sysctl_min_slab_ratio),
- .mode = 0644,
- .proc_handler = sysctl_min_slab_ratio_sysctl_handler,
- .extra1 = SYSCTL_ZERO,
- .extra2 = &one_hundred,
- },
-#endif
-#ifdef CONFIG_SMP
- {
- .procname = "stat_interval",
- .data = &sysctl_stat_interval,
- .maxlen = sizeof(sysctl_stat_interval),
- .mode = 0644,
- .proc_handler = proc_dointvec_jiffies,
- },
- {
- .procname = "stat_refresh",
- .data = NULL,
- .maxlen = 0,
- .mode = 0600,
- .proc_handler = vmstat_refresh,
- },
-#endif
-#ifdef CONFIG_MMU
- {
- .procname = "mmap_min_addr",
- .data = &dac_mmap_min_addr,
- .maxlen = sizeof(unsigned long),
- .mode = 0644,
- .proc_handler = mmap_min_addr_handler,
- },
-#endif
-#ifdef CONFIG_NUMA
- {
- .procname = "numa_zonelist_order",
- .data = &numa_zonelist_order,
- .maxlen = NUMA_ZONELIST_ORDER_LEN,
- .mode = 0644,
- .proc_handler = numa_zonelist_order_handler,
- },
-#endif
-#if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \
- (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL))
- {
- .procname = "vdso_enabled",
-#ifdef CONFIG_X86_32
- .data = &vdso32_enabled,
- .maxlen = sizeof(vdso32_enabled),
-#else
- .data = &vdso_enabled,
- .maxlen = sizeof(vdso_enabled),
-#endif
- .mode = 0644,
- .proc_handler = proc_dointvec,
- .extra1 = SYSCTL_ZERO,
- },
-#endif
-#ifdef CONFIG_HIGHMEM
- {
- .procname = "highmem_is_dirtyable",
- .data = &vm_highmem_is_dirtyable,
- .maxlen = sizeof(vm_highmem_is_dirtyable),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = SYSCTL_ZERO,
- .extra2 = SYSCTL_ONE,
- },
-#endif
-#ifdef CONFIG_MEMORY_FAILURE
- {
- .procname = "memory_failure_early_kill",
- .data = &sysctl_memory_failure_early_kill,
- .maxlen = sizeof(sysctl_memory_failure_early_kill),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = SYSCTL_ZERO,
- .extra2 = SYSCTL_ONE,
- },
- {
- .procname = "memory_failure_recovery",
- .data = &sysctl_memory_failure_recovery,
- .maxlen = sizeof(sysctl_memory_failure_recovery),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = SYSCTL_ZERO,
- .extra2 = SYSCTL_ONE,
- },
-#endif
- {
- .procname = "user_reserve_kbytes",
- .data = &sysctl_user_reserve_kbytes,
- .maxlen = sizeof(sysctl_user_reserve_kbytes),
- .mode = 0644,
- .proc_handler = proc_doulongvec_minmax,
- },
- {
- .procname = "admin_reserve_kbytes",
- .data = &sysctl_admin_reserve_kbytes,
- .maxlen = sizeof(sysctl_admin_reserve_kbytes),
- .mode = 0644,
- .proc_handler = proc_doulongvec_minmax,
- },
-#ifdef CONFIG_HAVE_ARCH_MMAP_RND_BITS
- {
- .procname = "mmap_rnd_bits",
- .data = &mmap_rnd_bits,
- .maxlen = sizeof(mmap_rnd_bits),
- .mode = 0600,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = (void *)&mmap_rnd_bits_min,
- .extra2 = (void *)&mmap_rnd_bits_max,
- },
-#endif
-#ifdef CONFIG_HAVE_ARCH_MMAP_RND_COMPAT_BITS
- {
- .procname = "mmap_rnd_compat_bits",
- .data = &mmap_rnd_compat_bits,
- .maxlen = sizeof(mmap_rnd_compat_bits),
- .mode = 0600,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = (void *)&mmap_rnd_compat_bits_min,
- .extra2 = (void *)&mmap_rnd_compat_bits_max,
- },
-#endif
-#ifdef CONFIG_USERFAULTFD
- {
- .procname = "unprivileged_userfaultfd",
- .data = &sysctl_unprivileged_userfaultfd,
- .maxlen = sizeof(sysctl_unprivileged_userfaultfd),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = SYSCTL_ZERO,
- .extra2 = SYSCTL_ONE,
- },
-#endif
- { }
-};
-
-static struct ctl_table fs_table[] = {
- {
- .procname = "inode-nr",
- .data = &inodes_stat,
- .maxlen = 2*sizeof(long),
- .mode = 0444,
- .proc_handler = proc_nr_inodes,
- },
- {
- .procname = "inode-state",
- .data = &inodes_stat,
- .maxlen = 7*sizeof(long),
- .mode = 0444,
- .proc_handler = proc_nr_inodes,
- },
- {
- .procname = "file-nr",
- .data = &files_stat,
- .maxlen = sizeof(files_stat),
- .mode = 0444,
- .proc_handler = proc_nr_files,
- },
- {
- .procname = "file-max",
- .data = &files_stat.max_files,
- .maxlen = sizeof(files_stat.max_files),
- .mode = 0644,
- .proc_handler = proc_doulongvec_minmax,
- .extra1 = &zero_ul,
- .extra2 = &long_max,
- },
- {
- .procname = "nr_open",
- .data = &sysctl_nr_open,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &sysctl_nr_open_min,
- .extra2 = &sysctl_nr_open_max,
- },
- {
- .procname = "dentry-state",
- .data = &dentry_stat,
- .maxlen = 6*sizeof(long),
- .mode = 0444,
- .proc_handler = proc_nr_dentry,
- },
- {
- .procname = "overflowuid",
- .data = &fs_overflowuid,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &minolduid,
- .extra2 = &maxolduid,
- },
- {
- .procname = "overflowgid",
- .data = &fs_overflowgid,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = &minolduid,
- .extra2 = &maxolduid,
- },
-#ifdef CONFIG_FILE_LOCKING
- {
- .procname = "leases-enable",
- .data = &leases_enable,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
-#endif
-#ifdef CONFIG_DNOTIFY
- {
- .procname = "dir-notify-enable",
- .data = &dir_notify_enable,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
-#endif
-#ifdef CONFIG_MMU
-#ifdef CONFIG_FILE_LOCKING
- {
- .procname = "lease-break-time",
- .data = &lease_break_time,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec,
- },
-#endif
-#ifdef CONFIG_AIO
- {
- .procname = "aio-nr",
- .data = &aio_nr,
- .maxlen = sizeof(aio_nr),
- .mode = 0444,
- .proc_handler = proc_doulongvec_minmax,
- },
- {
- .procname = "aio-max-nr",
- .data = &aio_max_nr,
- .maxlen = sizeof(aio_max_nr),
- .mode = 0644,
- .proc_handler = proc_doulongvec_minmax,
- },
-#endif /* CONFIG_AIO */
-#ifdef CONFIG_INOTIFY_USER
- {
- .procname = "inotify",
- .mode = 0555,
- .child = inotify_table,
- },
-#endif
-#ifdef CONFIG_EPOLL
- {
- .procname = "epoll",
- .mode = 0555,
- .child = epoll_table,
- },
-#endif
-#endif
- {
- .procname = "protected_symlinks",
- .data = &sysctl_protected_symlinks,
- .maxlen = sizeof(int),
- .mode = 0600,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = SYSCTL_ZERO,
- .extra2 = SYSCTL_ONE,
- },
- {
- .procname = "protected_hardlinks",
- .data = &sysctl_protected_hardlinks,
- .maxlen = sizeof(int),
- .mode = 0600,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = SYSCTL_ZERO,
- .extra2 = SYSCTL_ONE,
- },
- {
- .procname = "protected_fifos",
- .data = &sysctl_protected_fifos,
- .maxlen = sizeof(int),
- .mode = 0600,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = SYSCTL_ZERO,
- .extra2 = &two,
- },
- {
- .procname = "protected_regular",
- .data = &sysctl_protected_regular,
- .maxlen = sizeof(int),
- .mode = 0600,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = SYSCTL_ZERO,
- .extra2 = &two,
- },
- {
- .procname = "suid_dumpable",
- .data = &suid_dumpable,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax_coredump,
- .extra1 = SYSCTL_ZERO,
- .extra2 = &two,
- },
-#if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE)
- {
- .procname = "binfmt_misc",
- .mode = 0555,
- .child = sysctl_mount_point,
- },
-#endif
- {
- .procname = "pipe-max-size",
- .data = &pipe_max_size,
- .maxlen = sizeof(pipe_max_size),
- .mode = 0644,
- .proc_handler = proc_dopipe_max_size,
- },
- {
- .procname = "pipe-user-pages-hard",
- .data = &pipe_user_pages_hard,
- .maxlen = sizeof(pipe_user_pages_hard),
- .mode = 0644,
- .proc_handler = proc_doulongvec_minmax,
- },
- {
- .procname = "pipe-user-pages-soft",
- .data = &pipe_user_pages_soft,
- .maxlen = sizeof(pipe_user_pages_soft),
- .mode = 0644,
- .proc_handler = proc_doulongvec_minmax,
- },
- {
- .procname = "mount-max",
- .data = &sysctl_mount_max,
- .maxlen = sizeof(unsigned int),
- .mode = 0644,
- .proc_handler = proc_dointvec_minmax,
- .extra1 = SYSCTL_ONE,
- },
- { }
-};
-
-static struct ctl_table debug_table[] = {
-#ifdef CONFIG_SYSCTL_EXCEPTION_TRACE
- {
- .procname = "exception-trace",
- .data = &show_unhandled_signals,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_dointvec
- },
-#endif
-#if defined(CONFIG_OPTPROBES)
- {
- .procname = "kprobes-optimization",
- .data = &sysctl_kprobes_optimization,
- .maxlen = sizeof(int),
- .mode = 0644,
- .proc_handler = proc_kprobes_optimization_handler,
- .extra1 = SYSCTL_ZERO,
- .extra2 = SYSCTL_ONE,
- },
-#endif
- { }
-};
-
-static struct ctl_table dev_table[] = {
- { }
-};
-
-int __init sysctl_init(void)
-{
- struct ctl_table_header *hdr;
-
- hdr = register_sysctl_table(sysctl_base_table);
- kmemleak_not_leak(hdr);
- return 0;
-}
-
-#endif /* CONFIG_SYSCTL */
-
-/*
- * /proc/sys support
- */
-
+#endif /* CONFIG_SYSCTL */
+
+/*
+ * /proc/sys support
+ */
+
#ifdef CONFIG_PROC_SYSCTL
static int _proc_do_string(char *data, int maxlen, int write,
@@ -3307,95 +1577,1788 @@ int proc_dointvec(struct ctl_table *table, int write,
return -ENOSYS;
}
-int proc_douintvec(struct ctl_table *table, int write,
- void __user *buffer, size_t *lenp, loff_t *ppos)
+int proc_douintvec(struct ctl_table *table, int write,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ return -ENOSYS;
+}
+
+int proc_dointvec_minmax(struct ctl_table *table, int write,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ return -ENOSYS;
+}
+
+int proc_douintvec_minmax(struct ctl_table *table, int write,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ return -ENOSYS;
+}
+
+int proc_dointvec_jiffies(struct ctl_table *table, int write,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ return -ENOSYS;
+}
+
+int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ return -ENOSYS;
+}
+
+int proc_dointvec_ms_jiffies(struct ctl_table *table, int write,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
{
return -ENOSYS;
}
-int proc_dointvec_minmax(struct ctl_table *table, int write,
+int proc_doulongvec_minmax(struct ctl_table *table, int write,
void __user *buffer, size_t *lenp, loff_t *ppos)
{
return -ENOSYS;
}
-int proc_douintvec_minmax(struct ctl_table *table, int write,
- void __user *buffer, size_t *lenp, loff_t *ppos)
+int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write,
+ void __user *buffer,
+ size_t *lenp, loff_t *ppos)
{
- return -ENOSYS;
+ return -ENOSYS;
}
-int proc_dointvec_jiffies(struct ctl_table *table, int write,
- void __user *buffer, size_t *lenp, loff_t *ppos)
+int proc_do_large_bitmap(struct ctl_table *table, int write,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
{
return -ENOSYS;
}
-int proc_dointvec_userhz_jiffies(struct ctl_table *table, int write,
- void __user *buffer, size_t *lenp, loff_t *ppos)
-{
- return -ENOSYS;
-}
+#endif /* CONFIG_PROC_SYSCTL */
+
+#if defined(CONFIG_SYSCTL)
+int proc_do_static_key(struct ctl_table *table, int write,
+ void __user *buffer, size_t *lenp,
+ loff_t *ppos)
+{
+ struct static_key *key = (struct static_key *)table->data;
+ static DEFINE_MUTEX(static_key_mutex);
+ int val, ret;
+ struct ctl_table tmp = {
+ .data = &val,
+ .maxlen = sizeof(val),
+ .mode = table->mode,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_ONE,
+ };
+
+ if (write && !capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ mutex_lock(&static_key_mutex);
+ val = static_key_enabled(key);
+ ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);
+ if (write && !ret) {
+ if (val)
+ static_key_enable(key);
+ else
+ static_key_disable(key);
+ }
+ mutex_unlock(&static_key_mutex);
+ return ret;
+}
+
+static struct ctl_table kern_table[] = {
+ {
+ .procname = "sched_child_runs_first",
+ .data = &sysctl_sched_child_runs_first,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+#ifdef CONFIG_SCHED_DEBUG
+ {
+ .procname = "sched_min_granularity_ns",
+ .data = &sysctl_sched_min_granularity,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = sched_proc_update_handler,
+ .extra1 = &min_sched_granularity_ns,
+ .extra2 = &max_sched_granularity_ns,
+ },
+ {
+ .procname = "sched_latency_ns",
+ .data = &sysctl_sched_latency,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = sched_proc_update_handler,
+ .extra1 = &min_sched_granularity_ns,
+ .extra2 = &max_sched_granularity_ns,
+ },
+ {
+ .procname = "sched_wakeup_granularity_ns",
+ .data = &sysctl_sched_wakeup_granularity,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = sched_proc_update_handler,
+ .extra1 = &min_wakeup_granularity_ns,
+ .extra2 = &max_wakeup_granularity_ns,
+ },
+#ifdef CONFIG_SMP
+ {
+ .procname = "sched_tunable_scaling",
+ .data = &sysctl_sched_tunable_scaling,
+ .maxlen = sizeof(enum sched_tunable_scaling),
+ .mode = 0644,
+ .proc_handler = sched_proc_update_handler,
+ .extra1 = &min_sched_tunable_scaling,
+ .extra2 = &max_sched_tunable_scaling,
+ },
+ {
+ .procname = "sched_migration_cost_ns",
+ .data = &sysctl_sched_migration_cost,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+ {
+ .procname = "sched_nr_migrate",
+ .data = &sysctl_sched_nr_migrate,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+#ifdef CONFIG_SCHEDSTATS
+ {
+ .procname = "sched_schedstats",
+ .data = NULL,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = sysctl_schedstats,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_ONE,
+ },
+#endif /* CONFIG_SCHEDSTATS */
+#endif /* CONFIG_SMP */
+#ifdef CONFIG_NUMA_BALANCING
+ {
+ .procname = "numa_balancing_scan_delay_ms",
+ .data = &sysctl_numa_balancing_scan_delay,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+ {
+ .procname = "numa_balancing_scan_period_min_ms",
+ .data = &sysctl_numa_balancing_scan_period_min,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+ {
+ .procname = "numa_balancing_scan_period_max_ms",
+ .data = &sysctl_numa_balancing_scan_period_max,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+ {
+ .procname = "numa_balancing_scan_size_mb",
+ .data = &sysctl_numa_balancing_scan_size,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = SYSCTL_ONE,
+ },
+ {
+ .procname = "numa_balancing",
+ .data = NULL, /* filled in by handler */
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = sysctl_numa_balancing,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_ONE,
+ },
+#endif /* CONFIG_NUMA_BALANCING */
+#endif /* CONFIG_SCHED_DEBUG */
+ {
+ .procname = "sched_rt_period_us",
+ .data = &sysctl_sched_rt_period,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = sched_rt_handler,
+ },
+ {
+ .procname = "sched_rt_runtime_us",
+ .data = &sysctl_sched_rt_runtime,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = sched_rt_handler,
+ },
+ {
+ .procname = "sched_rr_timeslice_ms",
+ .data = &sysctl_sched_rr_timeslice,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = sched_rr_handler,
+ },
+#ifdef CONFIG_UCLAMP_TASK
+ {
+ .procname = "sched_util_clamp_min",
+ .data = &sysctl_sched_uclamp_util_min,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = sysctl_sched_uclamp_handler,
+ },
+ {
+ .procname = "sched_util_clamp_max",
+ .data = &sysctl_sched_uclamp_util_max,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = sysctl_sched_uclamp_handler,
+ },
+#endif
+#ifdef CONFIG_SCHED_AUTOGROUP
+ {
+ .procname = "sched_autogroup_enabled",
+ .data = &sysctl_sched_autogroup_enabled,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_ONE,
+ },
+#endif
+#ifdef CONFIG_CFS_BANDWIDTH
+ {
+ .procname = "sched_cfs_bandwidth_slice_us",
+ .data = &sysctl_sched_cfs_bandwidth_slice,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = SYSCTL_ONE,
+ },
+#endif
+#if defined(CONFIG_ENERGY_MODEL) && defined(CONFIG_CPU_FREQ_GOV_SCHEDUTIL)
+ {
+ .procname = "sched_energy_aware",
+ .data = &sysctl_sched_energy_aware,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = sched_energy_aware_handler,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_ONE,
+ },
+#endif
+#ifdef CONFIG_PROVE_LOCKING
+ {
+ .procname = "prove_locking",
+ .data = &prove_locking,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+#endif
+#ifdef CONFIG_LOCK_STAT
+ {
+ .procname = "lock_stat",
+ .data = &lock_stat,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+#endif
+ {
+ .procname = "panic",
+ .data = &panic_timeout,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+#ifdef CONFIG_COREDUMP
+ {
+ .procname = "core_uses_pid",
+ .data = &core_uses_pid,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+ {
+ .procname = "core_pattern",
+ .data = core_pattern,
+ .maxlen = CORENAME_MAX_SIZE,
+ .mode = 0644,
+ .proc_handler = proc_dostring_coredump,
+ },
+ {
+ .procname = "core_pipe_limit",
+ .data = &core_pipe_limit,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+#endif
+#ifdef CONFIG_PROC_SYSCTL
+ {
+ .procname = "tainted",
+ .maxlen = sizeof(long),
+ .mode = 0644,
+ .proc_handler = proc_taint,
+ },
+ {
+ .procname = "sysctl_writes_strict",
+ .data = &sysctl_writes_strict,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = &neg_one,
+ .extra2 = SYSCTL_ONE,
+ },
+#endif
+#ifdef CONFIG_LATENCYTOP
+ {
+ .procname = "latencytop",
+ .data = &latencytop_enabled,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = sysctl_latencytop,
+ },
+#endif
+#ifdef CONFIG_BLK_DEV_INITRD
+ {
+ .procname = "real-root-dev",
+ .data = &real_root_dev,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+#endif
+ {
+ .procname = "print-fatal-signals",
+ .data = &print_fatal_signals,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+#ifdef CONFIG_SPARC
+ {
+ .procname = "reboot-cmd",
+ .data = reboot_command,
+ .maxlen = 256,
+ .mode = 0644,
+ .proc_handler = proc_dostring,
+ },
+ {
+ .procname = "stop-a",
+ .data = &stop_a_enabled,
+ .maxlen = sizeof (int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+ {
+ .procname = "scons-poweroff",
+ .data = &scons_pwroff,
+ .maxlen = sizeof (int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+#endif
+#ifdef CONFIG_SPARC64
+ {
+ .procname = "tsb-ratio",
+ .data = &sysctl_tsb_ratio,
+ .maxlen = sizeof (int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+#endif
+#ifdef CONFIG_PARISC
+ {
+ .procname = "soft-power",
+ .data = &pwrsw_enabled,
+ .maxlen = sizeof (int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+#endif
+#ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW
+ {
+ .procname = "unaligned-trap",
+ .data = &unaligned_enabled,
+ .maxlen = sizeof (int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+#endif
+ {
+ .procname = "ctrl-alt-del",
+ .data = &C_A_D,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+#ifdef CONFIG_FUNCTION_TRACER
+ {
+ .procname = "ftrace_enabled",
+ .data = &ftrace_enabled,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = ftrace_enable_sysctl,
+ },
+#endif
+#ifdef CONFIG_STACK_TRACER
+ {
+ .procname = "stack_tracer_enabled",
+ .data = &stack_tracer_enabled,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = stack_trace_sysctl,
+ },
+#endif
+#ifdef CONFIG_TRACING
+ {
+ .procname = "ftrace_dump_on_oops",
+ .data = &ftrace_dump_on_oops,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+ {
+ .procname = "traceoff_on_warning",
+ .data = &__disable_trace_on_warning,
+ .maxlen = sizeof(__disable_trace_on_warning),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+ {
+ .procname = "tracepoint_printk",
+ .data = &tracepoint_printk,
+ .maxlen = sizeof(tracepoint_printk),
+ .mode = 0644,
+ .proc_handler = tracepoint_printk_sysctl,
+ },
+#endif
+#ifdef CONFIG_KEXEC_CORE
+ {
+ .procname = "kexec_load_disabled",
+ .data = &kexec_load_disabled,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ /* only handle a transition from default "0" to "1" */
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = SYSCTL_ONE,
+ .extra2 = SYSCTL_ONE,
+ },
+#endif
+#ifdef CONFIG_MODULES
+ {
+ .procname = "modprobe",
+ .data = &modprobe_path,
+ .maxlen = KMOD_PATH_LEN,
+ .mode = 0644,
+ .proc_handler = proc_dostring,
+ },
+ {
+ .procname = "modules_disabled",
+ .data = &modules_disabled,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ /* only handle a transition from default "0" to "1" */
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = SYSCTL_ONE,
+ .extra2 = SYSCTL_ONE,
+ },
+#endif
+#ifdef CONFIG_UEVENT_HELPER
+ {
+ .procname = "hotplug",
+ .data = &uevent_helper,
+ .maxlen = UEVENT_HELPER_PATH_LEN,
+ .mode = 0644,
+ .proc_handler = proc_dostring,
+ },
+#endif
+#ifdef CONFIG_CHR_DEV_SG
+ {
+ .procname = "sg-big-buff",
+ .data = &sg_big_buff,
+ .maxlen = sizeof (int),
+ .mode = 0444,
+ .proc_handler = proc_dointvec,
+ },
+#endif
+#ifdef CONFIG_BSD_PROCESS_ACCT
+ {
+ .procname = "acct",
+ .data = &acct_parm,
+ .maxlen = 3*sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+#endif
+#ifdef CONFIG_MAGIC_SYSRQ
+ {
+ .procname = "sysrq",
+ .data = NULL,
+ .maxlen = sizeof (int),
+ .mode = 0644,
+ .proc_handler = sysrq_sysctl_handler,
+ },
+#endif
+#ifdef CONFIG_PROC_SYSCTL
+ {
+ .procname = "cad_pid",
+ .data = NULL,
+ .maxlen = sizeof (int),
+ .mode = 0600,
+ .proc_handler = proc_do_cad_pid,
+ },
+#endif
+ {
+ .procname = "threads-max",
+ .data = NULL,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = sysctl_max_threads,
+ },
+ {
+ .procname = "random",
+ .mode = 0555,
+ .child = random_table,
+ },
+ {
+ .procname = "usermodehelper",
+ .mode = 0555,
+ .child = usermodehelper_table,
+ },
+#ifdef CONFIG_FW_LOADER_USER_HELPER
+ {
+ .procname = "firmware_config",
+ .mode = 0555,
+ .child = firmware_config_table,
+ },
+#endif
+ {
+ .procname = "overflowuid",
+ .data = &overflowuid,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = &minolduid,
+ .extra2 = &maxolduid,
+ },
+ {
+ .procname = "overflowgid",
+ .data = &overflowgid,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = &minolduid,
+ .extra2 = &maxolduid,
+ },
+#ifdef CONFIG_S390
+ {
+ .procname = "userprocess_debug",
+ .data = &show_unhandled_signals,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+#endif
+ {
+ .procname = "pid_max",
+ .data = &pid_max,
+ .maxlen = sizeof (int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = &pid_max_min,
+ .extra2 = &pid_max_max,
+ },
+ {
+ .procname = "panic_on_oops",
+ .data = &panic_on_oops,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+ {
+ .procname = "panic_print",
+ .data = &panic_print,
+ .maxlen = sizeof(unsigned long),
+ .mode = 0644,
+ .proc_handler = proc_doulongvec_minmax,
+ },
+#if defined CONFIG_PRINTK
+ {
+ .procname = "printk",
+ .data = &console_loglevel,
+ .maxlen = 4*sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+ {
+ .procname = "printk_ratelimit",
+ .data = &printk_ratelimit_state.interval,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_jiffies,
+ },
+ {
+ .procname = "printk_ratelimit_burst",
+ .data = &printk_ratelimit_state.burst,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+ {
+ .procname = "printk_delay",
+ .data = &printk_delay_msec,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = &ten_thousand,
+ },
+ {
+ .procname = "printk_devkmsg",
+ .data = devkmsg_log_str,
+ .maxlen = DEVKMSG_STR_MAX_SIZE,
+ .mode = 0644,
+ .proc_handler = devkmsg_sysctl_set_loglvl,
+ },
+ {
+ .procname = "dmesg_restrict",
+ .data = &dmesg_restrict,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax_sysadmin,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_ONE,
+ },
+ {
+ .procname = "kptr_restrict",
+ .data = &kptr_restrict,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax_sysadmin,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = &two,
+ },
+#endif
+ {
+ .procname = "ngroups_max",
+ .data = &ngroups_max,
+ .maxlen = sizeof (int),
+ .mode = 0444,
+ .proc_handler = proc_dointvec,
+ },
+ {
+ .procname = "cap_last_cap",
+ .data = (void *)&cap_last_cap,
+ .maxlen = sizeof(int),
+ .mode = 0444,
+ .proc_handler = proc_dointvec,
+ },
+#if defined(CONFIG_LOCKUP_DETECTOR)
+ {
+ .procname = "watchdog",
+ .data = &watchdog_user_enabled,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_watchdog,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_ONE,
+ },
+ {
+ .procname = "watchdog_thresh",
+ .data = &watchdog_thresh,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_watchdog_thresh,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = &sixty,
+ },
+ {
+ .procname = "nmi_watchdog",
+ .data = &nmi_watchdog_user_enabled,
+ .maxlen = sizeof(int),
+ .mode = NMI_WATCHDOG_SYSCTL_PERM,
+ .proc_handler = proc_nmi_watchdog,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_ONE,
+ },
+ {
+ .procname = "watchdog_cpumask",
+ .data = &watchdog_cpumask_bits,
+ .maxlen = NR_CPUS,
+ .mode = 0644,
+ .proc_handler = proc_watchdog_cpumask,
+ },
+#ifdef CONFIG_SOFTLOCKUP_DETECTOR
+ {
+ .procname = "soft_watchdog",
+ .data = &soft_watchdog_user_enabled,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_soft_watchdog,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_ONE,
+ },
+ {
+ .procname = "softlockup_panic",
+ .data = &softlockup_panic,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_ONE,
+ },
+#ifdef CONFIG_SMP
+ {
+ .procname = "softlockup_all_cpu_backtrace",
+ .data = &sysctl_softlockup_all_cpu_backtrace,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_ONE,
+ },
+#endif /* CONFIG_SMP */
+#endif
+#ifdef CONFIG_HARDLOCKUP_DETECTOR
+ {
+ .procname = "hardlockup_panic",
+ .data = &hardlockup_panic,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_ONE,
+ },
+#ifdef CONFIG_SMP
+ {
+ .procname = "hardlockup_all_cpu_backtrace",
+ .data = &sysctl_hardlockup_all_cpu_backtrace,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_ONE,
+ },
+#endif /* CONFIG_SMP */
+#endif
+#endif
+
+#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86)
+ {
+ .procname = "unknown_nmi_panic",
+ .data = &unknown_nmi_panic,
+ .maxlen = sizeof (int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+#endif
+#if defined(CONFIG_X86)
+ {
+ .procname = "panic_on_unrecovered_nmi",
+ .data = &panic_on_unrecovered_nmi,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+ {
+ .procname = "panic_on_io_nmi",
+ .data = &panic_on_io_nmi,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+#ifdef CONFIG_DEBUG_STACKOVERFLOW
+ {
+ .procname = "panic_on_stackoverflow",
+ .data = &sysctl_panic_on_stackoverflow,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+#endif
+ {
+ .procname = "bootloader_type",
+ .data = &bootloader_type,
+ .maxlen = sizeof (int),
+ .mode = 0444,
+ .proc_handler = proc_dointvec,
+ },
+ {
+ .procname = "bootloader_version",
+ .data = &bootloader_version,
+ .maxlen = sizeof (int),
+ .mode = 0444,
+ .proc_handler = proc_dointvec,
+ },
+ {
+ .procname = "io_delay_type",
+ .data = &io_delay_type,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+#endif
+#if defined(CONFIG_MMU)
+ {
+ .procname = "randomize_va_space",
+ .data = &randomize_va_space,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+#endif
+#if defined(CONFIG_S390) && defined(CONFIG_SMP)
+ {
+ .procname = "spin_retry",
+ .data = &spin_retry,
+ .maxlen = sizeof (int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+#endif
+#if defined(CONFIG_ACPI_SLEEP) && defined(CONFIG_X86)
+ {
+ .procname = "acpi_video_flags",
+ .data = &acpi_realmode_flags,
+ .maxlen = sizeof (unsigned long),
+ .mode = 0644,
+ .proc_handler = proc_doulongvec_minmax,
+ },
+#endif
+#ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN
+ {
+ .procname = "ignore-unaligned-usertrap",
+ .data = &no_unaligned_warning,
+ .maxlen = sizeof (int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+#endif
+#ifdef CONFIG_IA64
+ {
+ .procname = "unaligned-dump-stack",
+ .data = &unaligned_dump_stack,
+ .maxlen = sizeof (int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+#endif
+#ifdef CONFIG_DETECT_HUNG_TASK
+ {
+ .procname = "hung_task_panic",
+ .data = &sysctl_hung_task_panic,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_ONE,
+ },
+ {
+ .procname = "hung_task_check_count",
+ .data = &sysctl_hung_task_check_count,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = SYSCTL_ZERO,
+ },
+ {
+ .procname = "hung_task_timeout_secs",
+ .data = &sysctl_hung_task_timeout_secs,
+ .maxlen = sizeof(unsigned long),
+ .mode = 0644,
+ .proc_handler = proc_dohung_task_timeout_secs,
+ .extra2 = &hung_task_timeout_max,
+ },
+ {
+ .procname = "hung_task_check_interval_secs",
+ .data = &sysctl_hung_task_check_interval_secs,
+ .maxlen = sizeof(unsigned long),
+ .mode = 0644,
+ .proc_handler = proc_dohung_task_timeout_secs,
+ .extra2 = &hung_task_timeout_max,
+ },
+ {
+ .procname = "hung_task_warnings",
+ .data = &sysctl_hung_task_warnings,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = &neg_one,
+ },
+#endif
+#ifdef CONFIG_RT_MUTEXES
+ {
+ .procname = "max_lock_depth",
+ .data = &max_lock_depth,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+#endif
+ {
+ .procname = "poweroff_cmd",
+ .data = &poweroff_cmd,
+ .maxlen = POWEROFF_CMD_PATH_LEN,
+ .mode = 0644,
+ .proc_handler = proc_dostring,
+ },
+#ifdef CONFIG_KEYS
+ {
+ .procname = "keys",
+ .mode = 0555,
+ .child = key_sysctls,
+ },
+#endif
+#ifdef CONFIG_PERF_EVENTS
+ /*
+ * User-space scripts rely on the existence of this file
+ * as a feature check for perf_events being enabled.
+ *
+ * So it's an ABI, do not remove!
+ */
+ {
+ .procname = "perf_event_paranoid",
+ .data = &sysctl_perf_event_paranoid,
+ .maxlen = sizeof(sysctl_perf_event_paranoid),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+ {
+ .procname = "perf_event_mlock_kb",
+ .data = &sysctl_perf_event_mlock,
+ .maxlen = sizeof(sysctl_perf_event_mlock),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+ {
+ .procname = "perf_event_max_sample_rate",
+ .data = &sysctl_perf_event_sample_rate,
+ .maxlen = sizeof(sysctl_perf_event_sample_rate),
+ .mode = 0644,
+ .proc_handler = perf_proc_update_handler,
+ .extra1 = SYSCTL_ONE,
+ },
+ {
+ .procname = "perf_cpu_time_max_percent",
+ .data = &sysctl_perf_cpu_time_max_percent,
+ .maxlen = sizeof(sysctl_perf_cpu_time_max_percent),
+ .mode = 0644,
+ .proc_handler = perf_cpu_time_max_percent_handler,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = &one_hundred,
+ },
+ {
+ .procname = "perf_event_max_stack",
+ .data = &sysctl_perf_event_max_stack,
+ .maxlen = sizeof(sysctl_perf_event_max_stack),
+ .mode = 0644,
+ .proc_handler = perf_event_max_stack_handler,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = &six_hundred_forty_kb,
+ },
+ {
+ .procname = "perf_event_max_contexts_per_stack",
+ .data = &sysctl_perf_event_max_contexts_per_stack,
+ .maxlen = sizeof(sysctl_perf_event_max_contexts_per_stack),
+ .mode = 0644,
+ .proc_handler = perf_event_max_stack_handler,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = &one_thousand,
+ },
+#endif
+ {
+ .procname = "panic_on_warn",
+ .data = &panic_on_warn,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_ONE,
+ },
+#if defined(CONFIG_SMP) && defined(CONFIG_NO_HZ_COMMON)
+ {
+ .procname = "timer_migration",
+ .data = &sysctl_timer_migration,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = timer_migration_handler,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_ONE,
+ },
+#endif
+#ifdef CONFIG_BPF_SYSCALL
+ {
+ .procname = "unprivileged_bpf_disabled",
+ .data = &sysctl_unprivileged_bpf_disabled,
+ .maxlen = sizeof(sysctl_unprivileged_bpf_disabled),
+ .mode = 0644,
+ /* only handle a transition from default "0" to "1" */
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = SYSCTL_ONE,
+ .extra2 = SYSCTL_ONE,
+ },
+ {
+ .procname = "bpf_stats_enabled",
+ .data = &bpf_stats_enabled_key.key,
+ .maxlen = sizeof(bpf_stats_enabled_key),
+ .mode = 0644,
+ .proc_handler = proc_do_static_key,
+ },
+#endif
+#if defined(CONFIG_TREE_RCU)
+ {
+ .procname = "panic_on_rcu_stall",
+ .data = &sysctl_panic_on_rcu_stall,
+ .maxlen = sizeof(sysctl_panic_on_rcu_stall),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_ONE,
+ },
+#endif
+#ifdef CONFIG_STACKLEAK_RUNTIME_DISABLE
+ {
+ .procname = "stack_erasing",
+ .data = NULL,
+ .maxlen = sizeof(int),
+ .mode = 0600,
+ .proc_handler = stack_erasing_sysctl,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_ONE,
+ },
+#endif
+ { }
+};
-int proc_dointvec_ms_jiffies(struct ctl_table *table, int write,
- void __user *buffer, size_t *lenp, loff_t *ppos)
-{
- return -ENOSYS;
-}
+static struct ctl_table vm_table[] = {
+ {
+ .procname = "overcommit_memory",
+ .data = &sysctl_overcommit_memory,
+ .maxlen = sizeof(sysctl_overcommit_memory),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = &two,
+ },
+ {
+ .procname = "panic_on_oom",
+ .data = &sysctl_panic_on_oom,
+ .maxlen = sizeof(sysctl_panic_on_oom),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = &two,
+ },
+ {
+ .procname = "oom_kill_allocating_task",
+ .data = &sysctl_oom_kill_allocating_task,
+ .maxlen = sizeof(sysctl_oom_kill_allocating_task),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+ {
+ .procname = "oom_dump_tasks",
+ .data = &sysctl_oom_dump_tasks,
+ .maxlen = sizeof(sysctl_oom_dump_tasks),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+ {
+ .procname = "overcommit_ratio",
+ .data = &sysctl_overcommit_ratio,
+ .maxlen = sizeof(sysctl_overcommit_ratio),
+ .mode = 0644,
+ .proc_handler = overcommit_ratio_handler,
+ },
+ {
+ .procname = "overcommit_kbytes",
+ .data = &sysctl_overcommit_kbytes,
+ .maxlen = sizeof(sysctl_overcommit_kbytes),
+ .mode = 0644,
+ .proc_handler = overcommit_kbytes_handler,
+ },
+ {
+ .procname = "page-cluster",
+ .data = &page_cluster,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = SYSCTL_ZERO,
+ },
+ {
+ .procname = "dirty_background_ratio",
+ .data = &dirty_background_ratio,
+ .maxlen = sizeof(dirty_background_ratio),
+ .mode = 0644,
+ .proc_handler = dirty_background_ratio_handler,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = &one_hundred,
+ },
+ {
+ .procname = "dirty_background_bytes",
+ .data = &dirty_background_bytes,
+ .maxlen = sizeof(dirty_background_bytes),
+ .mode = 0644,
+ .proc_handler = dirty_background_bytes_handler,
+ .extra1 = &one_ul,
+ },
+ {
+ .procname = "dirty_ratio",
+ .data = &vm_dirty_ratio,
+ .maxlen = sizeof(vm_dirty_ratio),
+ .mode = 0644,
+ .proc_handler = dirty_ratio_handler,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = &one_hundred,
+ },
+ {
+ .procname = "dirty_bytes",
+ .data = &vm_dirty_bytes,
+ .maxlen = sizeof(vm_dirty_bytes),
+ .mode = 0644,
+ .proc_handler = dirty_bytes_handler,
+ .extra1 = &dirty_bytes_min,
+ },
+ {
+ .procname = "dirty_writeback_centisecs",
+ .data = &dirty_writeback_interval,
+ .maxlen = sizeof(dirty_writeback_interval),
+ .mode = 0644,
+ .proc_handler = dirty_writeback_centisecs_handler,
+ },
+ {
+ .procname = "dirty_expire_centisecs",
+ .data = &dirty_expire_interval,
+ .maxlen = sizeof(dirty_expire_interval),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = SYSCTL_ZERO,
+ },
+ {
+ .procname = "dirtytime_expire_seconds",
+ .data = &dirtytime_expire_interval,
+ .maxlen = sizeof(dirtytime_expire_interval),
+ .mode = 0644,
+ .proc_handler = dirtytime_interval_handler,
+ .extra1 = SYSCTL_ZERO,
+ },
+ {
+ .procname = "swappiness",
+ .data = &vm_swappiness,
+ .maxlen = sizeof(vm_swappiness),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = &one_hundred,
+ },
+#ifdef CONFIG_HUGETLB_PAGE
+ {
+ .procname = "nr_hugepages",
+ .data = NULL,
+ .maxlen = sizeof(unsigned long),
+ .mode = 0644,
+ .proc_handler = hugetlb_sysctl_handler,
+ },
+#ifdef CONFIG_NUMA
+ {
+ .procname = "nr_hugepages_mempolicy",
+ .data = NULL,
+ .maxlen = sizeof(unsigned long),
+ .mode = 0644,
+ .proc_handler = &hugetlb_mempolicy_sysctl_handler,
+ },
+ {
+ .procname = "numa_stat",
+ .data = &sysctl_vm_numa_stat,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = sysctl_vm_numa_stat_handler,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_ONE,
+ },
+#endif
+ {
+ .procname = "hugetlb_shm_group",
+ .data = &sysctl_hugetlb_shm_group,
+ .maxlen = sizeof(gid_t),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+ {
+ .procname = "nr_overcommit_hugepages",
+ .data = NULL,
+ .maxlen = sizeof(unsigned long),
+ .mode = 0644,
+ .proc_handler = hugetlb_overcommit_handler,
+ },
+#endif
+ {
+ .procname = "lowmem_reserve_ratio",
+ .data = &sysctl_lowmem_reserve_ratio,
+ .maxlen = sizeof(sysctl_lowmem_reserve_ratio),
+ .mode = 0644,
+ .proc_handler = lowmem_reserve_ratio_sysctl_handler,
+ },
+ {
+ .procname = "drop_caches",
+ .data = &sysctl_drop_caches,
+ .maxlen = sizeof(int),
+ .mode = 0200,
+ .proc_handler = drop_caches_sysctl_handler,
+ .extra1 = SYSCTL_ONE,
+ .extra2 = &four,
+ },
+#ifdef CONFIG_COMPACTION
+ {
+ .procname = "compact_memory",
+ .data = &sysctl_compact_memory,
+ .maxlen = sizeof(int),
+ .mode = 0200,
+ .proc_handler = sysctl_compaction_handler,
+ },
+ {
+ .procname = "extfrag_threshold",
+ .data = &sysctl_extfrag_threshold,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = &min_extfrag_threshold,
+ .extra2 = &max_extfrag_threshold,
+ },
+ {
+ .procname = "compact_unevictable_allowed",
+ .data = &sysctl_compact_unevictable_allowed,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax_warn_RT_change,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_ONE,
+ },
+
+#endif /* CONFIG_COMPACTION */
+ {
+ .procname = "min_free_kbytes",
+ .data = &min_free_kbytes,
+ .maxlen = sizeof(min_free_kbytes),
+ .mode = 0644,
+ .proc_handler = min_free_kbytes_sysctl_handler,
+ .extra1 = SYSCTL_ZERO,
+ },
+ {
+ .procname = "watermark_boost_factor",
+ .data = &watermark_boost_factor,
+ .maxlen = sizeof(watermark_boost_factor),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = SYSCTL_ZERO,
+ },
+ {
+ .procname = "watermark_scale_factor",
+ .data = &watermark_scale_factor,
+ .maxlen = sizeof(watermark_scale_factor),
+ .mode = 0644,
+ .proc_handler = watermark_scale_factor_sysctl_handler,
+ .extra1 = SYSCTL_ONE,
+ .extra2 = &one_thousand,
+ },
+ {
+ .procname = "percpu_pagelist_fraction",
+ .data = &percpu_pagelist_fraction,
+ .maxlen = sizeof(percpu_pagelist_fraction),
+ .mode = 0644,
+ .proc_handler = percpu_pagelist_fraction_sysctl_handler,
+ .extra1 = SYSCTL_ZERO,
+ },
+#ifdef CONFIG_MMU
+ {
+ .procname = "max_map_count",
+ .data = &sysctl_max_map_count,
+ .maxlen = sizeof(sysctl_max_map_count),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = SYSCTL_ZERO,
+ },
+#else
+ {
+ .procname = "nr_trim_pages",
+ .data = &sysctl_nr_trim_pages,
+ .maxlen = sizeof(sysctl_nr_trim_pages),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = SYSCTL_ZERO,
+ },
+#endif
+ {
+ .procname = "laptop_mode",
+ .data = &laptop_mode,
+ .maxlen = sizeof(laptop_mode),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_jiffies,
+ },
+ {
+ .procname = "block_dump",
+ .data = &block_dump,
+ .maxlen = sizeof(block_dump),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ .extra1 = SYSCTL_ZERO,
+ },
+ {
+ .procname = "vfs_cache_pressure",
+ .data = &sysctl_vfs_cache_pressure,
+ .maxlen = sizeof(sysctl_vfs_cache_pressure),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ .extra1 = SYSCTL_ZERO,
+ },
+#if defined(HAVE_ARCH_PICK_MMAP_LAYOUT) || \
+ defined(CONFIG_ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT)
+ {
+ .procname = "legacy_va_layout",
+ .data = &sysctl_legacy_va_layout,
+ .maxlen = sizeof(sysctl_legacy_va_layout),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ .extra1 = SYSCTL_ZERO,
+ },
+#endif
+#ifdef CONFIG_NUMA
+ {
+ .procname = "zone_reclaim_mode",
+ .data = &node_reclaim_mode,
+ .maxlen = sizeof(node_reclaim_mode),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ .extra1 = SYSCTL_ZERO,
+ },
+ {
+ .procname = "min_unmapped_ratio",
+ .data = &sysctl_min_unmapped_ratio,
+ .maxlen = sizeof(sysctl_min_unmapped_ratio),
+ .mode = 0644,
+ .proc_handler = sysctl_min_unmapped_ratio_sysctl_handler,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = &one_hundred,
+ },
+ {
+ .procname = "min_slab_ratio",
+ .data = &sysctl_min_slab_ratio,
+ .maxlen = sizeof(sysctl_min_slab_ratio),
+ .mode = 0644,
+ .proc_handler = sysctl_min_slab_ratio_sysctl_handler,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = &one_hundred,
+ },
+#endif
+#ifdef CONFIG_SMP
+ {
+ .procname = "stat_interval",
+ .data = &sysctl_stat_interval,
+ .maxlen = sizeof(sysctl_stat_interval),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_jiffies,
+ },
+ {
+ .procname = "stat_refresh",
+ .data = NULL,
+ .maxlen = 0,
+ .mode = 0600,
+ .proc_handler = vmstat_refresh,
+ },
+#endif
+#ifdef CONFIG_MMU
+ {
+ .procname = "mmap_min_addr",
+ .data = &dac_mmap_min_addr,
+ .maxlen = sizeof(unsigned long),
+ .mode = 0644,
+ .proc_handler = mmap_min_addr_handler,
+ },
+#endif
+#ifdef CONFIG_NUMA
+ {
+ .procname = "numa_zonelist_order",
+ .data = &numa_zonelist_order,
+ .maxlen = NUMA_ZONELIST_ORDER_LEN,
+ .mode = 0644,
+ .proc_handler = numa_zonelist_order_handler,
+ },
+#endif
+#if (defined(CONFIG_X86_32) && !defined(CONFIG_UML))|| \
+ (defined(CONFIG_SUPERH) && defined(CONFIG_VSYSCALL))
+ {
+ .procname = "vdso_enabled",
+#ifdef CONFIG_X86_32
+ .data = &vdso32_enabled,
+ .maxlen = sizeof(vdso32_enabled),
+#else
+ .data = &vdso_enabled,
+ .maxlen = sizeof(vdso_enabled),
+#endif
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ .extra1 = SYSCTL_ZERO,
+ },
+#endif
+#ifdef CONFIG_HIGHMEM
+ {
+ .procname = "highmem_is_dirtyable",
+ .data = &vm_highmem_is_dirtyable,
+ .maxlen = sizeof(vm_highmem_is_dirtyable),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_ONE,
+ },
+#endif
+#ifdef CONFIG_MEMORY_FAILURE
+ {
+ .procname = "memory_failure_early_kill",
+ .data = &sysctl_memory_failure_early_kill,
+ .maxlen = sizeof(sysctl_memory_failure_early_kill),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_ONE,
+ },
+ {
+ .procname = "memory_failure_recovery",
+ .data = &sysctl_memory_failure_recovery,
+ .maxlen = sizeof(sysctl_memory_failure_recovery),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_ONE,
+ },
+#endif
+ {
+ .procname = "user_reserve_kbytes",
+ .data = &sysctl_user_reserve_kbytes,
+ .maxlen = sizeof(sysctl_user_reserve_kbytes),
+ .mode = 0644,
+ .proc_handler = proc_doulongvec_minmax,
+ },
+ {
+ .procname = "admin_reserve_kbytes",
+ .data = &sysctl_admin_reserve_kbytes,
+ .maxlen = sizeof(sysctl_admin_reserve_kbytes),
+ .mode = 0644,
+ .proc_handler = proc_doulongvec_minmax,
+ },
+#ifdef CONFIG_HAVE_ARCH_MMAP_RND_BITS
+ {
+ .procname = "mmap_rnd_bits",
+ .data = &mmap_rnd_bits,
+ .maxlen = sizeof(mmap_rnd_bits),
+ .mode = 0600,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = (void *)&mmap_rnd_bits_min,
+ .extra2 = (void *)&mmap_rnd_bits_max,
+ },
+#endif
+#ifdef CONFIG_HAVE_ARCH_MMAP_RND_COMPAT_BITS
+ {
+ .procname = "mmap_rnd_compat_bits",
+ .data = &mmap_rnd_compat_bits,
+ .maxlen = sizeof(mmap_rnd_compat_bits),
+ .mode = 0600,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = (void *)&mmap_rnd_compat_bits_min,
+ .extra2 = (void *)&mmap_rnd_compat_bits_max,
+ },
+#endif
+#ifdef CONFIG_USERFAULTFD
+ {
+ .procname = "unprivileged_userfaultfd",
+ .data = &sysctl_unprivileged_userfaultfd,
+ .maxlen = sizeof(sysctl_unprivileged_userfaultfd),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_ONE,
+ },
+#endif
+ { }
+};
-int proc_doulongvec_minmax(struct ctl_table *table, int write,
- void __user *buffer, size_t *lenp, loff_t *ppos)
-{
- return -ENOSYS;
-}
+static struct ctl_table fs_table[] = {
+ {
+ .procname = "inode-nr",
+ .data = &inodes_stat,
+ .maxlen = 2*sizeof(long),
+ .mode = 0444,
+ .proc_handler = proc_nr_inodes,
+ },
+ {
+ .procname = "inode-state",
+ .data = &inodes_stat,
+ .maxlen = 7*sizeof(long),
+ .mode = 0444,
+ .proc_handler = proc_nr_inodes,
+ },
+ {
+ .procname = "file-nr",
+ .data = &files_stat,
+ .maxlen = sizeof(files_stat),
+ .mode = 0444,
+ .proc_handler = proc_nr_files,
+ },
+ {
+ .procname = "file-max",
+ .data = &files_stat.max_files,
+ .maxlen = sizeof(files_stat.max_files),
+ .mode = 0644,
+ .proc_handler = proc_doulongvec_minmax,
+ .extra1 = &zero_ul,
+ .extra2 = &long_max,
+ },
+ {
+ .procname = "nr_open",
+ .data = &sysctl_nr_open,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = &sysctl_nr_open_min,
+ .extra2 = &sysctl_nr_open_max,
+ },
+ {
+ .procname = "dentry-state",
+ .data = &dentry_stat,
+ .maxlen = 6*sizeof(long),
+ .mode = 0444,
+ .proc_handler = proc_nr_dentry,
+ },
+ {
+ .procname = "overflowuid",
+ .data = &fs_overflowuid,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = &minolduid,
+ .extra2 = &maxolduid,
+ },
+ {
+ .procname = "overflowgid",
+ .data = &fs_overflowgid,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = &minolduid,
+ .extra2 = &maxolduid,
+ },
+#ifdef CONFIG_FILE_LOCKING
+ {
+ .procname = "leases-enable",
+ .data = &leases_enable,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+#endif
+#ifdef CONFIG_DNOTIFY
+ {
+ .procname = "dir-notify-enable",
+ .data = &dir_notify_enable,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+#endif
+#ifdef CONFIG_MMU
+#ifdef CONFIG_FILE_LOCKING
+ {
+ .procname = "lease-break-time",
+ .data = &lease_break_time,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec,
+ },
+#endif
+#ifdef CONFIG_AIO
+ {
+ .procname = "aio-nr",
+ .data = &aio_nr,
+ .maxlen = sizeof(aio_nr),
+ .mode = 0444,
+ .proc_handler = proc_doulongvec_minmax,
+ },
+ {
+ .procname = "aio-max-nr",
+ .data = &aio_max_nr,
+ .maxlen = sizeof(aio_max_nr),
+ .mode = 0644,
+ .proc_handler = proc_doulongvec_minmax,
+ },
+#endif /* CONFIG_AIO */
+#ifdef CONFIG_INOTIFY_USER
+ {
+ .procname = "inotify",
+ .mode = 0555,
+ .child = inotify_table,
+ },
+#endif
+#ifdef CONFIG_EPOLL
+ {
+ .procname = "epoll",
+ .mode = 0555,
+ .child = epoll_table,
+ },
+#endif
+#endif
+ {
+ .procname = "protected_symlinks",
+ .data = &sysctl_protected_symlinks,
+ .maxlen = sizeof(int),
+ .mode = 0600,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_ONE,
+ },
+ {
+ .procname = "protected_hardlinks",
+ .data = &sysctl_protected_hardlinks,
+ .maxlen = sizeof(int),
+ .mode = 0600,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_ONE,
+ },
+ {
+ .procname = "protected_fifos",
+ .data = &sysctl_protected_fifos,
+ .maxlen = sizeof(int),
+ .mode = 0600,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = &two,
+ },
+ {
+ .procname = "protected_regular",
+ .data = &sysctl_protected_regular,
+ .maxlen = sizeof(int),
+ .mode = 0600,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = &two,
+ },
+ {
+ .procname = "suid_dumpable",
+ .data = &suid_dumpable,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax_coredump,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = &two,
+ },
+#if defined(CONFIG_BINFMT_MISC) || defined(CONFIG_BINFMT_MISC_MODULE)
+ {
+ .procname = "binfmt_misc",
+ .mode = 0555,
+ .child = sysctl_mount_point,
+ },
+#endif
+ {
+ .procname = "pipe-max-size",
+ .data = &pipe_max_size,
+ .maxlen = sizeof(pipe_max_size),
+ .mode = 0644,
+ .proc_handler = proc_dopipe_max_size,
+ },
+ {
+ .procname = "pipe-user-pages-hard",
+ .data = &pipe_user_pages_hard,
+ .maxlen = sizeof(pipe_user_pages_hard),
+ .mode = 0644,
+ .proc_handler = proc_doulongvec_minmax,
+ },
+ {
+ .procname = "pipe-user-pages-soft",
+ .data = &pipe_user_pages_soft,
+ .maxlen = sizeof(pipe_user_pages_soft),
+ .mode = 0644,
+ .proc_handler = proc_doulongvec_minmax,
+ },
+ {
+ .procname = "mount-max",
+ .data = &sysctl_mount_max,
+ .maxlen = sizeof(unsigned int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec_minmax,
+ .extra1 = SYSCTL_ONE,
+ },
+ { }
+};
-int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write,
- void __user *buffer,
- size_t *lenp, loff_t *ppos)
-{
- return -ENOSYS;
-}
+static struct ctl_table debug_table[] = {
+#ifdef CONFIG_SYSCTL_EXCEPTION_TRACE
+ {
+ .procname = "exception-trace",
+ .data = &show_unhandled_signals,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_dointvec
+ },
+#endif
+#if defined(CONFIG_OPTPROBES)
+ {
+ .procname = "kprobes-optimization",
+ .data = &sysctl_kprobes_optimization,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = proc_kprobes_optimization_handler,
+ .extra1 = SYSCTL_ZERO,
+ .extra2 = SYSCTL_ONE,
+ },
+#endif
+ { }
+};
-int proc_do_large_bitmap(struct ctl_table *table, int write,
- void __user *buffer, size_t *lenp, loff_t *ppos)
-{
- return -ENOSYS;
-}
+static struct ctl_table dev_table[] = {
+ { }
+};
-#endif /* CONFIG_PROC_SYSCTL */
+static struct ctl_table sysctl_base_table[] = {
+ {
+ .procname = "kernel",
+ .mode = 0555,
+ .child = kern_table,
+ },
+ {
+ .procname = "vm",
+ .mode = 0555,
+ .child = vm_table,
+ },
+ {
+ .procname = "fs",
+ .mode = 0555,
+ .child = fs_table,
+ },
+ {
+ .procname = "debug",
+ .mode = 0555,
+ .child = debug_table,
+ },
+ {
+ .procname = "dev",
+ .mode = 0555,
+ .child = dev_table,
+ },
+ { }
+};
-#if defined(CONFIG_SYSCTL)
-int proc_do_static_key(struct ctl_table *table, int write,
- void __user *buffer, size_t *lenp,
- loff_t *ppos)
+int __init sysctl_init(void)
{
- struct static_key *key = (struct static_key *)table->data;
- static DEFINE_MUTEX(static_key_mutex);
- int val, ret;
- struct ctl_table tmp = {
- .data = &val,
- .maxlen = sizeof(val),
- .mode = table->mode,
- .extra1 = SYSCTL_ZERO,
- .extra2 = SYSCTL_ONE,
- };
-
- if (write && !capable(CAP_SYS_ADMIN))
- return -EPERM;
+ struct ctl_table_header *hdr;
- mutex_lock(&static_key_mutex);
- val = static_key_enabled(key);
- ret = proc_dointvec_minmax(&tmp, write, buffer, lenp, ppos);
- if (write && !ret) {
- if (val)
- static_key_enable(key);
- else
- static_key_disable(key);
- }
- mutex_unlock(&static_key_mutex);
- return ret;
+ hdr = register_sysctl_table(sysctl_base_table);
+ kmemleak_not_leak(hdr);
+ return 0;
}
-#endif
+#endif /* CONFIG_SYSCTL */
/*
* No sense putting this after each symbol definition, twice,
* exception granted :-)
--
2.26.1
^ permalink raw reply related [flat|nested] 17+ messages in thread
* Re: [PATCH 5/5] sysctl: pass kernel pointers to ->proc_handler
[not found] ` <20200421171539.288622-6-hch@lst.de>
@ 2020-04-21 19:16 ` Al Viro
2020-04-22 2:46 ` Al Viro
2020-04-21 19:23 ` Andrey Ignatov
1 sibling, 1 reply; 17+ messages in thread
From: Al Viro @ 2020-04-21 19:16 UTC (permalink / raw)
To: Christoph Hellwig
Cc: Kees Cook, Iurii Zaikin, Alexei Starovoitov, Daniel Borkmann,
linux-kernel, linux-mm, linux-fsdevel, netdev, bpf
On Tue, Apr 21, 2020 at 07:15:39PM +0200, Christoph Hellwig wrote:
> Instead of having all the sysctl handlers deal with user pointers, which
> is rather hairy in terms of the BPF interaction, copy the input to and
> from userspace in common code. This also means that the strings are
> always NUL-terminated by the common code, making the API a little bit
> safer.
>
> As most handler just pass through the data to one of the common handlers
> a lot of the changes are mechnical.
> @@ -564,27 +564,38 @@ static ssize_t proc_sys_call_handler(struct file *filp, void __user *buf,
> if (!table->proc_handler)
> goto out;
>
> - error = BPF_CGROUP_RUN_PROG_SYSCTL(head, table, write, buf, &count,
> - ppos, &new_buf);
> + if (write) {
> + kbuf = memdup_user_nul(ubuf, count);
> + if (IS_ERR(kbuf)) {
> + error = PTR_ERR(kbuf);
> + goto out;
> + }
> + } else {
> + error = -ENOMEM;
> + kbuf = kzalloc(count, GFP_KERNEL);
Better allocate count + 1 bytes here, that way a lot of insanity in the
instances can be simply converted to snprintf(). Yes, I know it'll bring
the Church Of Avoiding The Abomination Of Sprintf out of the woodwork,
but...
^ permalink raw reply [flat|nested] 17+ messages in thread
* Re: [PATCH 5/5] sysctl: pass kernel pointers to ->proc_handler
[not found] ` <20200421171539.288622-6-hch@lst.de>
2020-04-21 19:16 ` [PATCH 5/5] sysctl: pass kernel pointers to ->proc_handler Al Viro
@ 2020-04-21 19:23 ` Andrey Ignatov
2020-04-22 17:22 ` Christoph Hellwig
1 sibling, 1 reply; 17+ messages in thread
From: Andrey Ignatov @ 2020-04-21 19:23 UTC (permalink / raw)
To: Christoph Hellwig
Cc: Kees Cook, Iurii Zaikin, Alexei Starovoitov, Daniel Borkmann,
linux-kernel, linux-mm, linux-fsdevel, netdev, bpf
Christoph Hellwig <hch@lst.de> [Tue, 2020-04-21 10:17 -0700]:
> Instead of having all the sysctl handlers deal with user pointers, which
> is rather hairy in terms of the BPF interaction, copy the input to and
> from userspace in common code. This also means that the strings are
> always NUL-terminated by the common code, making the API a little bit
> safer.
>
> As most handler just pass through the data to one of the common handlers
> a lot of the changes are mechnical.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
...
> @@ -1172,36 +1168,28 @@ int __cgroup_bpf_run_filter_sysctl(struct ctl_table_header *head,
> .new_updated = 0,
> };
> struct cgroup *cgrp;
> + loff_t pos = 0;
> int ret;
>
> ctx.cur_val = kmalloc_track_caller(ctx.cur_len, GFP_KERNEL);
> - if (ctx.cur_val) {
> - mm_segment_t old_fs;
> - loff_t pos = 0;
> -
> - old_fs = get_fs();
> - set_fs(KERNEL_DS);
> - if (table->proc_handler(table, 0, (void __user *)ctx.cur_val,
> - &ctx.cur_len, &pos)) {
> - /* Let BPF program decide how to proceed. */
> - ctx.cur_len = 0;
> - }
> - set_fs(old_fs);
> - } else {
> + if (!ctx.cur_val ||
> + table->proc_handler(table, 0, ctx.cur_val, &ctx.cur_len, &pos)) {
> /* Let BPF program decide how to proceed. */
> ctx.cur_len = 0;
> }
>
> - if (write && buf && *pcount) {
> + if (write && *buf && *pcount) {
> /* BPF program should be able to override new value with a
> * buffer bigger than provided by user.
> */
> ctx.new_val = kmalloc_track_caller(PAGE_SIZE, GFP_KERNEL);
> ctx.new_len = min_t(size_t, PAGE_SIZE, *pcount);
> - if (!ctx.new_val ||
> - copy_from_user(ctx.new_val, buf, ctx.new_len))
> + if (ctx.new_val) {
> + memcpy(ctx.new_val, *buf, ctx.new_len);
> + } else {
> /* Let BPF program decide how to proceed. */
> ctx.new_len = 0;
> + }
> }
>
> rcu_read_lock();
> @@ -1212,7 +1200,7 @@ int __cgroup_bpf_run_filter_sysctl(struct ctl_table_header *head,
> kfree(ctx.cur_val);
>
> if (ret == 1 && ctx.new_updated) {
> - *new_buf = ctx.new_val;
> + *buf = ctx.new_val;
Original value of *buf should be freed before overriding it here
otherwise it's lost/leaked unless I missed something.
Other than this BPF part of this patch looks good to me. Feel free to
add my Ack on the next iteration with this fix.
> *pcount = ctx.new_len;
> } else {
> kfree(ctx.new_val);
--
Andrey Ignatov
^ permalink raw reply [flat|nested] 17+ messages in thread
* Re: [PATCH 2/5] mm: remove watermark_boost_factor_sysctl_handler
2020-04-21 17:15 ` [PATCH 2/5] mm: remove watermark_boost_factor_sysctl_handler Christoph Hellwig
@ 2020-04-21 19:31 ` David Rientjes
0 siblings, 0 replies; 17+ messages in thread
From: David Rientjes @ 2020-04-21 19:31 UTC (permalink / raw)
To: Christoph Hellwig
Cc: Kees Cook, Iurii Zaikin, Alexei Starovoitov, Daniel Borkmann,
linux-kernel, linux-mm, linux-fsdevel, netdev, bpf
On Tue, 21 Apr 2020, Christoph Hellwig wrote:
> watermark_boost_factor_sysctl_handler is just a pointless wrapper for
> proc_dointvec_minmax, so remove it and use proc_dointvec_minmax
> directly.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: David Rientjes <rientjes@google.com>
^ permalink raw reply [flat|nested] 17+ messages in thread
* Re: [PATCH 5/5] sysctl: pass kernel pointers to ->proc_handler
2020-04-21 19:16 ` [PATCH 5/5] sysctl: pass kernel pointers to ->proc_handler Al Viro
@ 2020-04-22 2:46 ` Al Viro
2020-04-22 6:09 ` Christoph Hellwig
0 siblings, 1 reply; 17+ messages in thread
From: Al Viro @ 2020-04-22 2:46 UTC (permalink / raw)
To: Christoph Hellwig
Cc: Kees Cook, Iurii Zaikin, Alexei Starovoitov, Daniel Borkmann,
linux-kernel, linux-mm, linux-fsdevel, netdev, bpf
On Tue, Apr 21, 2020 at 08:16:15PM +0100, Al Viro wrote:
> On Tue, Apr 21, 2020 at 07:15:39PM +0200, Christoph Hellwig wrote:
> > Instead of having all the sysctl handlers deal with user pointers, which
> > is rather hairy in terms of the BPF interaction, copy the input to and
> > from userspace in common code. This also means that the strings are
> > always NUL-terminated by the common code, making the API a little bit
> > safer.
> >
> > As most handler just pass through the data to one of the common handlers
> > a lot of the changes are mechnical.
>
> > @@ -564,27 +564,38 @@ static ssize_t proc_sys_call_handler(struct file *filp, void __user *buf,
> > if (!table->proc_handler)
> > goto out;
> >
> > - error = BPF_CGROUP_RUN_PROG_SYSCTL(head, table, write, buf, &count,
> > - ppos, &new_buf);
> > + if (write) {
> > + kbuf = memdup_user_nul(ubuf, count);
> > + if (IS_ERR(kbuf)) {
> > + error = PTR_ERR(kbuf);
> > + goto out;
> > + }
> > + } else {
> > + error = -ENOMEM;
> > + kbuf = kzalloc(count, GFP_KERNEL);
>
> Better allocate count + 1 bytes here, that way a lot of insanity in the
> instances can be simply converted to snprintf(). Yes, I know it'll bring
> the Church Of Avoiding The Abomination Of Sprintf out of the woodwork,
> but...
FWIW, consider e.g. net/sunrpc/sysctl.c:
Nevermind that the read side should be simply
int err = proc_douintvec(table, write, buffer, lenp, ppos);
/* Display the RPC tasks on writing to rpc_debug */
if (!err && strcmp(table->procname, "rpc_debug") == 0)
rpc_show_tasks(&init_net);
return err;
the write side would become
len = snprintf(buffer, *lenp + 1, "0x%04x\n",
*(unsigned int *)table->data);
if (len > *lenp)
len = *lenp;
*lenp -= len;
*ppos += len;
return 0;
and I really wonder if lifting the trailing boilerplate into the caller would've
been better. Note that e.g. gems like
if (!first)
err = proc_put_char(&buffer, &left, '\t');
if (err)
break;
err = proc_put_long(&buffer, &left, lval, neg);
if (err)
break;
are due to lack of snprintf-to-user; now, lose the "to user" part and we suddenly
can be rid of that stuff...
^ permalink raw reply [flat|nested] 17+ messages in thread
* Re: [PATCH 5/5] sysctl: pass kernel pointers to ->proc_handler
2020-04-22 2:46 ` Al Viro
@ 2020-04-22 6:09 ` Christoph Hellwig
0 siblings, 0 replies; 17+ messages in thread
From: Christoph Hellwig @ 2020-04-22 6:09 UTC (permalink / raw)
To: Al Viro
Cc: Christoph Hellwig, Kees Cook, Iurii Zaikin, Alexei Starovoitov,
Daniel Borkmann, linux-kernel, linux-mm, linux-fsdevel, netdev,
bpf
On Wed, Apr 22, 2020 at 03:46:26AM +0100, Al Viro wrote:
> > Better allocate count + 1 bytes here, that way a lot of insanity in the
> > instances can be simply converted to snprintf(). Yes, I know it'll bring
> > the Church Of Avoiding The Abomination Of Sprintf out of the woodwork,
> > but...
>
> FWIW, consider e.g. net/sunrpc/sysctl.c:
>
> Nevermind that the read side should be simply
> int err = proc_douintvec(table, write, buffer, lenp, ppos);
> /* Display the RPC tasks on writing to rpc_debug */
> if (!err && strcmp(table->procname, "rpc_debug") == 0)
> rpc_show_tasks(&init_net);
> return err;
> the write side would become
> len = snprintf(buffer, *lenp + 1, "0x%04x\n",
> *(unsigned int *)table->data);
> if (len > *lenp)
> len = *lenp;
> *lenp -= len;
> *ppos += len;
> return 0;
> and I really wonder if lifting the trailing boilerplate into the caller would've
> been better. Note that e.g. gems like
> if (!first)
> err = proc_put_char(&buffer, &left, '\t');
> if (err)
> break;
> err = proc_put_long(&buffer, &left, lval, neg);
> if (err)
> break;
> are due to lack of snprintf-to-user; now, lose the "to user" part and we suddenly
> can be rid of that stuff...
That sounds pretty sensible, but can we do that as an extra step?
That is in merge window N just move to passing kernel pointers, check
for fall out. In merge window N + 1 start allocatin the extra byte and
switch at least the common helpers for snprintf?
^ permalink raw reply [flat|nested] 17+ messages in thread
* Re: [PATCH 3/5] sysctl: remove all extern declaration from sysctl.c
2020-04-21 17:15 ` [PATCH 3/5] sysctl: remove all extern declaration from sysctl.c Christoph Hellwig
@ 2020-04-22 10:30 ` Vlastimil Babka
2020-04-22 17:24 ` Christoph Hellwig
0 siblings, 1 reply; 17+ messages in thread
From: Vlastimil Babka @ 2020-04-22 10:30 UTC (permalink / raw)
To: Christoph Hellwig, Kees Cook, Iurii Zaikin
Cc: Alexei Starovoitov, Daniel Borkmann, linux-kernel, linux-mm,
linux-fsdevel, netdev, bpf, Andrew Morton
On 4/21/20 7:15 PM, Christoph Hellwig wrote:
> Extern declarations in .c files are a bad style and can lead to
> mismatches. Use existing definitions in headers where they exist,
> and otherwise move the external declarations to suitable header
> files.
Your cleanup reminds me of this Andrew's sigh from last week [1].
I'm not saying your series should do that too, just wondering if some of the
moves you are doing now would be better suited for the hypothetical new header
to avoid moving them again later (but I admit I haven't looked closer).
[1]
https://lore.kernel.org/linux-api/20200417174654.9af0c51afb5d9e35e5519113@linux-foundation.org/
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> ---
> include/linux/coredump.h | 6 ++++++
> include/linux/file.h | 2 ++
> include/linux/mm.h | 2 ++
> include/linux/mmzone.h | 2 ++
> include/linux/sysctl.h | 8 +++++++
> kernel/sysctl.c | 45 +++-------------------------------------
> 6 files changed, 23 insertions(+), 42 deletions(-)
>
> diff --git a/include/linux/coredump.h b/include/linux/coredump.h
> index abf4b4e65dbb..0fe8f3131e97 100644
> --- a/include/linux/coredump.h
> +++ b/include/linux/coredump.h
> @@ -22,4 +22,10 @@ extern void do_coredump(const kernel_siginfo_t *siginfo);
> static inline void do_coredump(const kernel_siginfo_t *siginfo) {}
> #endif
>
> +extern int core_uses_pid;
> +extern char core_pattern[];
> +extern unsigned int core_pipe_limit;
> +extern int pid_max;
> +extern int pid_max_min, pid_max_max;
> +
> #endif /* _LINUX_COREDUMP_H */
> diff --git a/include/linux/file.h b/include/linux/file.h
> index 142d102f285e..122f80084a3e 100644
> --- a/include/linux/file.h
> +++ b/include/linux/file.h
> @@ -94,4 +94,6 @@ extern void fd_install(unsigned int fd, struct file *file);
> extern void flush_delayed_fput(void);
> extern void __fput_sync(struct file *);
>
> +extern unsigned int sysctl_nr_open_min, sysctl_nr_open_max;
> +
> #endif /* __LINUX_FILE_H */
> diff --git a/include/linux/mm.h b/include/linux/mm.h
> index 5a323422d783..9c4e7e76dedd 100644
> --- a/include/linux/mm.h
> +++ b/include/linux/mm.h
> @@ -3140,5 +3140,7 @@ unsigned long wp_shared_mapping_range(struct address_space *mapping,
> pgoff_t first_index, pgoff_t nr);
> #endif
>
> +extern int sysctl_nr_trim_pages;
> +
> #endif /* __KERNEL__ */
> #endif /* _LINUX_MM_H */
> diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
> index f37bb8f187fc..b2af594ef0f7 100644
> --- a/include/linux/mmzone.h
> +++ b/include/linux/mmzone.h
> @@ -909,6 +909,7 @@ static inline int is_highmem(struct zone *zone)
>
> /* These two functions are used to setup the per zone pages min values */
> struct ctl_table;
> +
> int min_free_kbytes_sysctl_handler(struct ctl_table *, int,
> void __user *, size_t *, loff_t *);
> int watermark_scale_factor_sysctl_handler(struct ctl_table *, int,
> @@ -925,6 +926,7 @@ int sysctl_min_slab_ratio_sysctl_handler(struct ctl_table *, int,
>
> extern int numa_zonelist_order_handler(struct ctl_table *, int,
> void __user *, size_t *, loff_t *);
> +extern int percpu_pagelist_fraction;
> extern char numa_zonelist_order[];
> #define NUMA_ZONELIST_ORDER_LEN 16
>
> diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h
> index 02fa84493f23..36143ca40b56 100644
> --- a/include/linux/sysctl.h
> +++ b/include/linux/sysctl.h
> @@ -207,7 +207,15 @@ void unregister_sysctl_table(struct ctl_table_header * table);
>
> extern int sysctl_init(void);
>
> +extern int pwrsw_enabled;
> +extern int unaligned_enabled;
> +extern int unaligned_dump_stack;
> +extern int no_unaligned_warning;
> +
> extern struct ctl_table sysctl_mount_point[];
> +extern struct ctl_table random_table[];
> +extern struct ctl_table firmware_config_table[];
> +extern struct ctl_table epoll_table[];
>
> #else /* CONFIG_SYSCTL */
> static inline struct ctl_table_header *register_sysctl_table(struct ctl_table * table)
> diff --git a/kernel/sysctl.c b/kernel/sysctl.c
> index 99d27acf4646..31b934865ebc 100644
> --- a/kernel/sysctl.c
> +++ b/kernel/sysctl.c
> @@ -68,6 +68,9 @@
> #include <linux/bpf.h>
> #include <linux/mount.h>
> #include <linux/userfaultfd_k.h>
> +#include <linux/coredump.h>
> +#include <linux/latencytop.h>
> +#include <linux/pid.h>
>
> #include "../lib/kstrtox.h"
>
> @@ -103,22 +106,6 @@
>
> #if defined(CONFIG_SYSCTL)
>
> -/* External variables not in a header file. */
> -extern int suid_dumpable;
> -#ifdef CONFIG_COREDUMP
> -extern int core_uses_pid;
> -extern char core_pattern[];
> -extern unsigned int core_pipe_limit;
> -#endif
> -extern int pid_max;
> -extern int pid_max_min, pid_max_max;
> -extern int percpu_pagelist_fraction;
> -extern int latencytop_enabled;
> -extern unsigned int sysctl_nr_open_min, sysctl_nr_open_max;
> -#ifndef CONFIG_MMU
> -extern int sysctl_nr_trim_pages;
> -#endif
> -
> /* Constants used for minimum and maximum */
> #ifdef CONFIG_LOCKUP_DETECTOR
> static int sixty = 60;
> @@ -160,24 +147,6 @@ static unsigned long hung_task_timeout_max = (LONG_MAX/HZ);
> #ifdef CONFIG_INOTIFY_USER
> #include <linux/inotify.h>
> #endif
> -#ifdef CONFIG_SPARC
> -#endif
> -
> -#ifdef CONFIG_PARISC
> -extern int pwrsw_enabled;
> -#endif
> -
> -#ifdef CONFIG_SYSCTL_ARCH_UNALIGN_ALLOW
> -extern int unaligned_enabled;
> -#endif
> -
> -#ifdef CONFIG_IA64
> -extern int unaligned_dump_stack;
> -#endif
> -
> -#ifdef CONFIG_SYSCTL_ARCH_UNALIGN_NO_WARN
> -extern int no_unaligned_warning;
> -#endif
>
> #ifdef CONFIG_PROC_SYSCTL
>
> @@ -243,14 +212,6 @@ static struct ctl_table vm_table[];
> static struct ctl_table fs_table[];
> static struct ctl_table debug_table[];
> static struct ctl_table dev_table[];
> -extern struct ctl_table random_table[];
> -#ifdef CONFIG_EPOLL
> -extern struct ctl_table epoll_table[];
> -#endif
> -
> -#ifdef CONFIG_FW_LOADER_USER_HELPER
> -extern struct ctl_table firmware_config_table[];
> -#endif
>
> #if defined(HAVE_ARCH_PICK_MMAP_LAYOUT) || \
> defined(CONFIG_ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT)
>
^ permalink raw reply [flat|nested] 17+ messages in thread
* Re: [PATCH 5/5] sysctl: pass kernel pointers to ->proc_handler
2020-04-21 19:23 ` Andrey Ignatov
@ 2020-04-22 17:22 ` Christoph Hellwig
2020-04-22 23:40 ` Andrey Ignatov
0 siblings, 1 reply; 17+ messages in thread
From: Christoph Hellwig @ 2020-04-22 17:22 UTC (permalink / raw)
To: Andrey Ignatov
Cc: Christoph Hellwig, Kees Cook, Iurii Zaikin, Alexei Starovoitov,
Daniel Borkmann, linux-kernel, linux-mm, linux-fsdevel, netdev,
bpf
On Tue, Apr 21, 2020 at 12:23:30PM -0700, Andrey Ignatov wrote:
> > if (ret == 1 && ctx.new_updated) {
> > - *new_buf = ctx.new_val;
> > + *buf = ctx.new_val;
>
> Original value of *buf should be freed before overriding it here
> otherwise it's lost/leaked unless I missed something.
>
> Other than this BPF part of this patch looks good to me. Feel free to
> add my Ack on the next iteration with this fix.
Thanks, fixed.
Can you also comment on "bpf-cgroup: remove unused exports" ?
^ permalink raw reply [flat|nested] 17+ messages in thread
* Re: [PATCH 3/5] sysctl: remove all extern declaration from sysctl.c
2020-04-22 10:30 ` Vlastimil Babka
@ 2020-04-22 17:24 ` Christoph Hellwig
0 siblings, 0 replies; 17+ messages in thread
From: Christoph Hellwig @ 2020-04-22 17:24 UTC (permalink / raw)
To: Vlastimil Babka
Cc: Christoph Hellwig, Kees Cook, Iurii Zaikin, Alexei Starovoitov,
Daniel Borkmann, linux-kernel, linux-mm, linux-fsdevel, netdev,
bpf, Andrew Morton
On Wed, Apr 22, 2020 at 12:30:22PM +0200, Vlastimil Babka wrote:
> On 4/21/20 7:15 PM, Christoph Hellwig wrote:
> > Extern declarations in .c files are a bad style and can lead to
> > mismatches. Use existing definitions in headers where they exist,
> > and otherwise move the external declarations to suitable header
> > files.
>
> Your cleanup reminds me of this Andrew's sigh from last week [1].
> I'm not saying your series should do that too, just wondering if some of the
> moves you are doing now would be better suited for the hypothetical new header
> to avoid moving them again later (but I admit I haven't looked closer).
>
> [1]
> https://lore.kernel.org/linux-api/20200417174654.9af0c51afb5d9e35e5519113@linux-foundation.org/
I thought of that, but I'm not really sure it is worth it. I'd rather
move more sysctl implementations out of sysctl.c and just export
the tables back to it.
^ permalink raw reply [flat|nested] 17+ messages in thread
* Re: [PATCH 1/5] bpf-cgroup: remove unused exports
2020-04-21 17:15 ` [PATCH 1/5] bpf-cgroup: remove unused exports Christoph Hellwig
@ 2020-04-22 23:39 ` Andrey Ignatov
0 siblings, 0 replies; 17+ messages in thread
From: Andrey Ignatov @ 2020-04-22 23:39 UTC (permalink / raw)
To: Christoph Hellwig
Cc: Kees Cook, Iurii Zaikin, Alexei Starovoitov, Daniel Borkmann,
linux-kernel, linux-mm, linux-fsdevel, netdev, bpf
Christoph Hellwig <hch@lst.de> [Tue, 2020-04-21 10:17 -0700]:
> Except for a few of the networking hooks called from modular ipv4 or
> ipv6 code, all of hooks are just called from guaranteed to be built-in
> code.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
I checked it as well it see same thing:
- __cgroup_bpf_check_dev_permission is called in
security/device_cgroup.c under CONFIG_CGROUP_DEVICE;
- __cgroup_bpf_run_filter_sysctl is called in fs/proc/proc_sysctl.c
under CONFIG_PROC_SYSCTL;
- __cgroup_bpf_run_filter_[gs]etsockopt is called in net/socket.c under
CONFIG_NET;
All three configs are bool-s so LGTM.
Acked-by: Andrey Ignatov <rdna@fb.com>
--
Andrey Ignatov
^ permalink raw reply [flat|nested] 17+ messages in thread
* Re: [PATCH 5/5] sysctl: pass kernel pointers to ->proc_handler
2020-04-22 17:22 ` Christoph Hellwig
@ 2020-04-22 23:40 ` Andrey Ignatov
0 siblings, 0 replies; 17+ messages in thread
From: Andrey Ignatov @ 2020-04-22 23:40 UTC (permalink / raw)
To: Christoph Hellwig
Cc: Kees Cook, Iurii Zaikin, Alexei Starovoitov, Daniel Borkmann,
linux-kernel, linux-mm, linux-fsdevel, netdev, bpf
Christoph Hellwig <hch@lst.de> [Wed, 2020-04-22 10:23 -0700]:
> On Tue, Apr 21, 2020 at 12:23:30PM -0700, Andrey Ignatov wrote:
> > > if (ret == 1 && ctx.new_updated) {
> > > - *new_buf = ctx.new_val;
> > > + *buf = ctx.new_val;
> >
> > Original value of *buf should be freed before overriding it here
> > otherwise it's lost/leaked unless I missed something.
> >
> > Other than this BPF part of this patch looks good to me. Feel free to
> > add my Ack on the next iteration with this fix.
>
> Thanks, fixed.
>
> Can you also comment on "bpf-cgroup: remove unused exports" ?
Sure, reviewed.
--
Andrey Ignatov
^ permalink raw reply [flat|nested] 17+ messages in thread
* Re: [PATCH 1/5] bpf-cgroup: remove unused exports
2020-04-24 6:43 ` [PATCH 1/5] bpf-cgroup: remove unused exports Christoph Hellwig
@ 2020-04-27 21:23 ` Daniel Borkmann
0 siblings, 0 replies; 17+ messages in thread
From: Daniel Borkmann @ 2020-04-27 21:23 UTC (permalink / raw)
To: Christoph Hellwig, Kees Cook, Iurii Zaikin
Cc: Alexei Starovoitov, linux-kernel, linux-mm, linux-fsdevel,
netdev, bpf, Andrey Ignatov
On 4/24/20 8:43 AM, Christoph Hellwig wrote:
> Except for a few of the networking hooks called from modular ipv4 or
> ipv6 code, all of hooks are just called from guaranteed to be built-in
> code.
>
> Signed-off-by: Christoph Hellwig <hch@lst.de>
> Acked-by: Andrey Ignatov <rdna@fb.com>
Applied this one to bpf-next, thanks!
^ permalink raw reply [flat|nested] 17+ messages in thread
* [PATCH 1/5] bpf-cgroup: remove unused exports
2020-04-24 6:43 pass kernel pointers to the sysctl ->proc_handler method v3 Christoph Hellwig
@ 2020-04-24 6:43 ` Christoph Hellwig
2020-04-27 21:23 ` Daniel Borkmann
0 siblings, 1 reply; 17+ messages in thread
From: Christoph Hellwig @ 2020-04-24 6:43 UTC (permalink / raw)
To: Kees Cook, Iurii Zaikin
Cc: Alexei Starovoitov, Daniel Borkmann, linux-kernel, linux-mm,
linux-fsdevel, netdev, bpf, Andrey Ignatov
Except for a few of the networking hooks called from modular ipv4 or
ipv6 code, all of hooks are just called from guaranteed to be built-in
code.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Andrey Ignatov <rdna@fb.com>
---
kernel/bpf/cgroup.c | 4 ----
1 file changed, 4 deletions(-)
diff --git a/kernel/bpf/cgroup.c b/kernel/bpf/cgroup.c
index cb305e71e7deb..929d9a7263da1 100644
--- a/kernel/bpf/cgroup.c
+++ b/kernel/bpf/cgroup.c
@@ -1054,7 +1054,6 @@ int __cgroup_bpf_check_dev_permission(short dev_type, u32 major, u32 minor,
return !allow;
}
-EXPORT_SYMBOL(__cgroup_bpf_check_dev_permission);
static const struct bpf_func_proto *
cgroup_base_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
@@ -1221,7 +1220,6 @@ int __cgroup_bpf_run_filter_sysctl(struct ctl_table_header *head,
return ret == 1 ? 0 : -EPERM;
}
-EXPORT_SYMBOL(__cgroup_bpf_run_filter_sysctl);
#ifdef CONFIG_NET
static bool __cgroup_bpf_prog_array_is_empty(struct cgroup *cgrp,
@@ -1326,7 +1324,6 @@ int __cgroup_bpf_run_filter_setsockopt(struct sock *sk, int *level,
sockopt_free_buf(&ctx);
return ret;
}
-EXPORT_SYMBOL(__cgroup_bpf_run_filter_setsockopt);
int __cgroup_bpf_run_filter_getsockopt(struct sock *sk, int level,
int optname, char __user *optval,
@@ -1413,7 +1410,6 @@ int __cgroup_bpf_run_filter_getsockopt(struct sock *sk, int level,
sockopt_free_buf(&ctx);
return ret;
}
-EXPORT_SYMBOL(__cgroup_bpf_run_filter_getsockopt);
#endif
static ssize_t sysctl_cpy_dir(const struct ctl_dir *dir, char **bufp,
--
2.26.1
^ permalink raw reply related [flat|nested] 17+ messages in thread
end of thread, other threads:[~2020-04-27 21:23 UTC | newest]
Thread overview: 17+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-04-21 17:15 pass kernel pointers to the sysctl ->proc_handler method v2 Christoph Hellwig
2020-04-21 17:15 ` [PATCH 1/5] bpf-cgroup: remove unused exports Christoph Hellwig
2020-04-22 23:39 ` Andrey Ignatov
2020-04-21 17:15 ` [PATCH 2/5] mm: remove watermark_boost_factor_sysctl_handler Christoph Hellwig
2020-04-21 19:31 ` David Rientjes
2020-04-21 17:15 ` [PATCH 3/5] sysctl: remove all extern declaration from sysctl.c Christoph Hellwig
2020-04-22 10:30 ` Vlastimil Babka
2020-04-22 17:24 ` Christoph Hellwig
2020-04-21 17:15 ` [PATCH 4/5] sysctl: avoid forward declarations Christoph Hellwig
[not found] ` <20200421171539.288622-6-hch@lst.de>
2020-04-21 19:16 ` [PATCH 5/5] sysctl: pass kernel pointers to ->proc_handler Al Viro
2020-04-22 2:46 ` Al Viro
2020-04-22 6:09 ` Christoph Hellwig
2020-04-21 19:23 ` Andrey Ignatov
2020-04-22 17:22 ` Christoph Hellwig
2020-04-22 23:40 ` Andrey Ignatov
2020-04-24 6:43 pass kernel pointers to the sysctl ->proc_handler method v3 Christoph Hellwig
2020-04-24 6:43 ` [PATCH 1/5] bpf-cgroup: remove unused exports Christoph Hellwig
2020-04-27 21:23 ` Daniel Borkmann
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