path: root/kernel/sysctl_binary.c

#include <linux/stat.h>
#include <linux/sysctl.h>
#include "../fs/xfs/xfs_sysctl.h"
#include <linux/sunrpc/debug.h>
#include <linux/string.h>
#include <net/ip_vs.h>
#include <linux/syscalls.h>
#include <linux/namei.h>
#include <linux/mount.h>
#include <linux/fs.h>
#include <linux/nsproxy.h>
#include <linux/pid_namespace.h>
#include <linux/file.h>
#include <linux/ctype.h>
#include <linux/netdevice.h>
#include <linux/kernel.h>
#include <linux/slab.h>

#ifdef CONFIG_SYSCTL_SYSCALL

struct bin_table;
typedef ssize_t bin_convert_t(struct file *file,
	void __user *oldval, size_t oldlen, void __user *newval, size_t newlen);

static bin_convert_t bin_dir;
static bin_convert_t bin_string;
static bin_convert_t bin_intvec;
static bin_convert_t bin_ulongvec;
static bin_convert_t bin_uuid;
static bin_convert_t bin_dn_node_address;

#define CTL_DIR   bin_dir
#define CTL_STR   bin_string
#define CTL_INT   bin_intvec
#define CTL_ULONG bin_ulongvec
#define CTL_UUID  bin_uuid
#define CTL_DNADR bin_dn_node_address

#define BUFSZ 256

struct bin_table {
	bin_convert_t		*convert;
	int			ctl_name;
	const char		*procname;
	const struct bin_table	*child;
};

static const struct bin_table bin_random_table[] = {
	{ CTL_INT,	RANDOM_POOLSIZE,	"poolsize" },
	{ CTL_INT,	RANDOM_ENTROPY_COUNT,	"entropy_avail" },
	{ CTL_INT,	RANDOM_READ_THRESH,	"read_wakeup_threshold" },
	{ CTL_INT,	RANDOM_WRITE_THRESH,	"write_wakeup_threshold" },
	{ CTL_UUID,	RANDOM_BOOT_ID,		"boot_id" },
	{ CTL_UUID,	RANDOM_UUID,		"uuid" },
	{}
};

static const struct bin_table bin_pty_table[] = {
	{ CTL_INT,	PTY_MAX,	"max" },
	{ CTL_INT,	PTY_NR,		"nr" },
	{}
};

static const struct bin_table bin_kern_table[] = {
	{ CTL_STR,	KERN_OSTYPE,			"ostype" },
	{ CTL_STR,	KERN_OSRELEASE,			"osrelease" },
	/* KERN_OSREV not used */
	{ CTL_STR,	KERN_VERSION,			"version" },
	/* KERN_SECUREMASK not used */
	/* KERN_PROF not used */
	{ CTL_STR,	KERN_NODENAME,			"hostname" },
	{ CTL_STR,	KERN_DOMAINNAME,		"domainname" },

	{ CTL_INT,	KERN_PANIC,			"panic" },
	{ CTL_INT,	KERN_REALROOTDEV,		"real-root-dev" },

	{ CTL_STR,	KERN_SPARC_REBOOT,		"reboot-cmd" },
	{ CTL_INT,	KERN_CTLALTDEL,			"ctrl-alt-del" },
	{ CTL_INT,	KERN_PRINTK,			"printk" },

	/* KERN_NAMETRANS not used */
	/* KERN_PPC_HTABRECLAIM not used */
	/* KERN_PPC_ZEROPAGED not used */
	{ CTL_INT,	KERN_PPC_POWERSAVE_NAP,		"powersave-nap" },

	{ CTL_STR,	KERN_MODPROBE,			"modprobe" },
	{ CTL_INT,	KERN_SG_BIG_BUFF,		"sg-big-buff" },
	{ CTL_INT,	KERN_ACCT,			"acct" },
	/* KERN_PPC_L2CR "l2cr" no longer used */

	/* KERN_RTSIGNR not used */
	/* KERN_RTSIGMAX not used */

	{ CTL_ULONG,	KERN_SHMMAX,			"shmmax" },
	{ CTL_INT,	KERN_MSGMAX,			"msgmax" },
	{ CTL_INT,	KERN_MSGMNB,			"msgmnb" },
	/* KERN_MSGPOOL not used*/
	{ CTL_INT,	KERN_SYSRQ,			"sysrq" },
	{ CTL_INT,	KERN_MAX_THREADS,		"threads-max" },
	{ CTL_DIR,	KERN_RANDOM,			"random",	bin_random_table },
	{ CTL_ULONG,	KERN_SHMALL,			"shmall" },
	{ CTL_INT,	KERN_MSGMNI,			"msgmni" },
	{ CTL_INT,	KERN_SEM,			"sem" },
	{ CTL_INT,	KERN_SPARC_STOP_A,		"stop-a" },
	{ CTL_INT,	KERN_SHMMNI,			"shmmni" },

	{ CTL_INT,	KERN_OVERFLOWUID,		"overflowuid" },
	{ CTL_INT,	KERN_OVERFLOWGID,		"overflowgid" },

	{ CTL_STR,	KERN_HOTPLUG,			"hotplug", },
	{ CTL_INT,	KERN_IEEE_EMULATION_WARNINGS,	"ieee_emulation_warnings" },

	{ CTL_INT,	KERN_S390_USER_DEBUG_LOGGING,	"userprocess_debug" },
	{ CTL_INT,	KERN_CORE_USES_PID,		"core_uses_pid" },
	/* KERN_TAINTED "tainted" no longer used */
	{ CTL_INT,	KERN_CADPID,			"cad_pid" },
	{ CTL_INT,	KERN_PIDMAX,			"pid_max" },
	{ CTL_STR,	KERN_CORE_PATTERN,		"core_pattern" },
	{ CTL_INT,	KERN_PANIC_ON_OOPS,		"panic_on_oops" },
	{ CTL_INT,	KERN_HPPA_PWRSW,		"soft-power" },
	{ CTL_INT,	KERN_HPPA_UNALIGNED,		"unaligned-trap" },

	{ CTL_INT,	KERN_PRINTK_RATELIMIT,		"printk_ratelimit" },
	{ CTL_INT,	KERN_PRINTK_RATELIMIT_BURST,	"printk_ratelimit_burst" },

	{ CTL_DIR,	KERN_PTY,			"pty",		bin_pty_table },
	{ CTL_INT,	KERN_NGROUPS_MAX,		"ngroups_max" },
	{ CTL_INT,	KERN_SPARC_SCONS_PWROFF,	"scons-poweroff" },
	/* KERN_HZ_TIMER "hz_timer" no longer used */
	{ CTL_INT,	KERN_UNKNOWN_NMI_PANIC,		"unknown_nmi_panic" },
	{ CTL_INT,	KERN_BOOTLOADER_TYPE,		"bootloader_type" },
	{ CTL_INT,	KERN_RANDOMIZE,			"randomize_va_space" },

	{ CTL_INT,	KERN_SPIN_RETRY,		"spin_retry" },
	/* KERN_ACPI_VIDEO_FLAGS "acpi_video_flags" no longer used */
	{ CTL_INT,	KERN_IA64_UNALIGNED,		"ignore-unaligned-usertrap" },
	{ CTL_INT,	KERN_COMPAT_LOG,		"compat-log" },
	{ CTL_INT,	KERN_MAX_LOCK_DEPTH,		"max_lock_depth" },
	{ CTL_INT,	KERN_PANIC_ON_NMI,		"panic_on_unrecovered_nmi" },
	{}
};

static const struct bin_table bin_vm_table[] = {
	{ CTL_INT,	VM_OVERCOMMIT_MEMORY,		"overcommit_memory" },
	{ CTL_INT,	VM_PAGE_CLUSTER,		"page-cluster" },
	{ CTL_INT,	VM_DIRTY_BACKGROUND,		"dirty_background_ratio" },
	{ CTL_INT,	VM_DIRTY_RATIO,			"dirty_ratio" },
	/* VM_DIRTY_WB_CS "dirty_writeback_centisecs" no longer used */
	/* VM_DIRTY_EXPIRE_CS "dirty_expire_centisecs" no longer used */
	{ CTL_INT,	VM_NR_PDFLUSH_THREADS,		"nr_pdflush_threads" },
	{ CTL_INT,	VM_OVERCOMMIT_RATIO,		"overcommit_ratio" },
	/* VM_PAGEBUF unused */
	/* VM_HUGETLB_PAGES "nr_hugepages" no longer used */
	{ CTL_INT,	VM_SWAPPINESS,			"swappiness" },
	{ CTL_INT,	VM_LOWMEM_RESERVE_RATIO,	"lowmem_reserve_ratio" },
	{ CTL_INT,	VM_MIN_FREE_KBYTES,		"min_free_kbytes" },
	{ CTL_INT,	VM_MAX_MAP_COUNT,		"max_map_count" },
	{ CTL_INT,	VM_LAPTOP_MODE,			"laptop_mode" },
	{ CTL_INT,	VM_BLOCK_DUMP,			"block_dump" },
	{ CTL_INT,	VM_HUGETLB_GROUP,		"hugetlb_shm_group" },
	{ CTL_INT,	VM_VFS_CACHE_PRESSURE,	"vfs_cache_pressure" },
	{ CTL_INT,	VM_LEGACY_VA_LAYOUT,		"legacy_va_layout" },
	/* VM_SWAP_TOKEN_TIMEOUT unused */
	{ CTL_INT,	VM_DROP_PAGECACHE,		"drop_caches" },
	{ CTL_INT,	VM_PERCPU_PAGELIST_FRACTION,	"percpu_pagelist_fraction" },
	{ CTL_INT,	VM_ZONE_RECLAIM_MODE,		"zone_reclaim_mode" },
	{ CTL_INT,	VM_MIN_UNMAPPED,		"min_unmapped_ratio" },
	{ CTL_INT,	VM_PANIC_ON_OOM,		"panic_on_oom" },
	{ CTL_INT,	VM_VDSO_ENABLED,		"vdso_enabled" },
	{ CTL_INT,	VM_MIN_SLAB,			"min_slab_ratio" },

	{}
};

static const struct bin_table bin_net_core_table[] = {
	{ CTL_INT,	NET_CORE_WMEM_MAX,	"wmem_max" },
	{ CTL_INT,	NET_CORE_RMEM_MAX,	"rmem_max" },
	{ CTL_INT,	NET_CORE_WMEM_DEFAULT,	"wmem_default" },
	{ CTL_INT,	NET_CORE_RMEM_DEFAULT,	"rmem_default" },
	/* NET_CORE_DESTROY_DELAY unused */
	{ CTL_INT,	NET_CORE_MAX_BACKLOG,	"netdev_max_backlog" },
	/* NET_CORE_FASTROUTE unused */
	{ CTL_INT,	NET_CORE_MSG_COST,	"message_cost" },
	{ CTL_INT,	NET_CORE_MSG_BURST,	"message_burst" },
	{ CTL_INT,	NET_CORE_OPTMEM_MAX,	"optmem_max" },
	/* NET_CORE_HOT_LIST_LENGTH unused */
	/* NET_CORE_DIVERT_VERSION unused */
	/* NET_CORE_NO_CONG_THRESH unused */
	/* NET_CORE_NO_CONG unused */
	/* NET_CORE_LO_CONG unused */
	/* NET_CORE_MOD_CONG unused */
	{ CTL_INT,	NET_CORE_DEV_WEIGHT,	"dev_weight" },
	{ CTL_INT,	NET_CORE_SOMAXCONN,	"somaxconn" },
	{ CTL_INT,	NET_CORE_BUDGET,	"netdev_budget" },
	{ CTL_INT,	NET_CORE_AEVENT_ETIME,	"xfrm_aevent_etime" },
	{ CTL_INT,	NET_CORE_AEVENT_RSEQTH,	"xfrm_aevent_rseqth" },
	{ CTL_INT,	NET_CORE_WARNINGS,	"warnings" },
	{},
};

static const struct bin_table bin_net_unix_table[] = {
	/* NET_UNIX_DESTROY_DELAY unused */
	/* NET_UNIX_DELETE_DELAY unused */
	{ CTL_INT,	NET_UNIX_MAX_DGRAM_QLEN,	"max_dgram_qlen" },
	{}
};

static const struct bin_table bin_net_ipv4_route_table[] = {
	{ CTL_INT,	NET_IPV4_ROUTE_FLUSH,			"flush" },
	/* NET_IPV4_ROUTE_MIN_DELAY "min_delay" no longer used */
	/* NET_IPV4_ROUTE_MAX_DELAY "max_delay" no longer used */
	{ CTL_INT,	NET_IPV4_ROUTE_GC_THRESH,		"gc_thresh" },
	{ CTL_INT,	NET_IPV4_ROUTE_MAX_SIZE,		"max_size" },
	{ CTL_INT,	NET_IPV4_ROUTE_GC_MIN_INTERVAL,		"gc_min_interval" },
	{ CTL_INT,	NET_IPV4_ROUTE_GC_MIN_INTERVAL_MS,	"gc_min_interval_ms" },
	{ CTL_INT,	NET_IPV4_ROUTE_GC_TIMEOUT,		"gc_timeout" },
	/* NET_IPV4_ROUTE_GC_INTERVAL "gc_interval" no longer used */
	{ CTL_INT,	NET_IPV4_ROUTE_REDIRECT_LOAD,		"redirect_load" },
	{ CTL_INT,	NET_IPV4_ROUTE_REDIRECT_NUMBER,		"redirect_number" },
	{ CTL_INT,	NET_I