sysctl_binary.c

Go to the documentation of this file.

#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 */
    /* VM_NR_PDFLUSH_THREADS "nr_pdflush_threads" no longer used */
    { 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_IPV4_ROUTE_REDIRECT_SILENCE,    "redirect_silence" },
    { CTL_INT,  NET_IPV4_ROUTE_ERROR_COST,      "error_cost" },
    { CTL_INT,  NET_IPV4_ROUTE_ERROR_BURST,     "error_burst" },
    { CTL_INT,  NET_IPV4_ROUTE_GC_ELASTICITY,       "gc_elasticity" },
    { CTL_INT,  NET_IPV4_ROUTE_MTU_EXPIRES,     "mtu_expires" },
    { CTL_INT,  NET_IPV4_ROUTE_MIN_PMTU,        "min_pmtu" },
    { CTL_INT,  NET_IPV4_ROUTE_MIN_ADVMSS,      "min_adv_mss" },
    {}
};

static const struct bin_table bin_net_ipv4_conf_vars_table[] = {
    { CTL_INT,  NET_IPV4_CONF_FORWARDING,       "forwarding" },
    { CTL_INT,  NET_IPV4_CONF_MC_FORWARDING,        "mc_forwarding" },

    { CTL_INT,  NET_IPV4_CONF_ACCEPT_REDIRECTS,     "accept_redirects" },
    { CTL_INT,  NET_IPV4_CONF_SECURE_REDIRECTS,     "secure_redirects" },
    { CTL_INT,  NET_IPV4_CONF_SEND_REDIRECTS,       "send_redirects" },
    { CTL_INT,  NET_IPV4_CONF_SHARED_MEDIA,     "shared_media" },
    { CTL_INT,  NET_IPV4_CONF_RP_FILTER,        "rp_filter" },
    { CTL_INT,  NET_IPV4_CONF_ACCEPT_SOURCE_ROUTE,  "accept_source_route" },
    { CTL_INT,  NET_IPV4_CONF_PROXY_ARP,        "proxy_arp" },
    { CTL_INT,  NET_IPV4_CONF_MEDIUM_ID,        "medium_id" },
    { CTL_INT,  NET_IPV4_CONF_BOOTP_RELAY,      "bootp_relay" },
    { CTL_INT,  NET_IPV4_CONF_LOG_MARTIANS,     "log_martians" },
    { CTL_INT,  NET_IPV4_CONF_TAG,          "tag" },
    { CTL_INT,  NET_IPV4_CONF_ARPFILTER,        "arp_filter" },
    { CTL_INT,  NET_IPV4_CONF_ARP_ANNOUNCE,     "arp_announce" },
    { CTL_INT,  NET_IPV4_CONF_ARP_IGNORE,       "arp_ignore" },
    { CTL_INT,  NET_IPV4_CONF_ARP_ACCEPT,       "arp_accept" },
    { CTL_INT,  NET_IPV4_CONF_ARP_NOTIFY,       "arp_notify" },

    { CTL_INT,  NET_IPV4_CONF_NOXFRM,           "disable_xfrm" },
    { CTL_INT,  NET_IPV4_CONF_NOPOLICY,         "disable_policy" },
    { CTL_INT,  NET_IPV4_CONF_FORCE_IGMP_VERSION,   "force_igmp_version" },
    { CTL_INT,  NET_IPV4_CONF_PROMOTE_SECONDARIES,  "promote_secondaries" },
    {}
};

static const struct bin_table bin_net_ipv4_conf_table[] = {
    { CTL_DIR,  NET_PROTO_CONF_ALL, "all",      bin_net_ipv4_conf_vars_table },
    { CTL_DIR,  NET_PROTO_CONF_DEFAULT, "default",  bin_net_ipv4_conf_vars_table },
    { CTL_DIR,  0, NULL, bin_net_ipv4_conf_vars_table },
    {}
};

static const struct bin_table bin_net_neigh_vars_table[] = {
    { CTL_INT,  NET_NEIGH_MCAST_SOLICIT,    "mcast_solicit" },
    { CTL_INT,  NET_NEIGH_UCAST_SOLICIT,    "ucast_solicit" },
    { CTL_INT,  NET_NEIGH_APP_SOLICIT,      "app_solicit" },
    /* NET_NEIGH_RETRANS_TIME "retrans_time" no longer used */
    { CTL_INT,  NET_NEIGH_REACHABLE_TIME,   "base_reachable_time" },
    { CTL_INT,  NET_NEIGH_DELAY_PROBE_TIME, "delay_first_probe_time" },
    { CTL_INT,  NET_NEIGH_GC_STALE_TIME,    "gc_stale_time" },
    { CTL_INT,  NET_NEIGH_UNRES_QLEN,       "unres_qlen" },
    { CTL_INT,  NET_NEIGH_PROXY_QLEN,       "proxy_qlen" },
    /* NET_NEIGH_ANYCAST_DELAY "anycast_delay" no longer used */
    /* NET_NEIGH_PROXY_DELAY "proxy_delay" no longer used */
    /* NET_NEIGH_LOCKTIME "locktime" no longer used */
    { CTL_INT,  NET_NEIGH_GC_INTERVAL,      "gc_interval" },
    { CTL_INT,  NET_NEIGH_GC_THRESH1,       "gc_thresh1" },
    { CTL_INT,  NET_NEIGH_GC_THRESH2,       "gc_thresh2" },
    { CTL_INT,  NET_NEIGH_GC_THRESH3,       "gc_thresh3" },
    { CTL_INT,  NET_NEIGH_RETRANS_TIME_MS,  "retrans_time_ms" },
    { CTL_INT,  NET_NEIGH_REACHABLE_TIME_MS,    "base_reachable_time_ms" },
    {}
};

static const struct bin_table bin_net_neigh_table[] = {
    { CTL_DIR,  NET_PROTO_CONF_DEFAULT, "default", bin_net_neigh_vars_table },
    { CTL_DIR,  0, NULL, bin_net_neigh_vars_table },
    {}
};

static const struct bin_table bin_net_ipv4_netfilter_table[] = {
    { CTL_INT,  NET_IPV4_NF_CONNTRACK_MAX,      "ip_conntrack_max" },

    /* NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_SYN_SENT "ip_conntrack_tcp_timeout_syn_sent" no longer used */
    /* NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_SYN_RECV "ip_conntrack_tcp_timeout_syn_recv" no longer used */
    /* NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_ESTABLISHED "ip_conntrack_tcp_timeout_established" no longer used */
    /* NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_FIN_WAIT "ip_conntrack_tcp_timeout_fin_wait" no longer used */
    /* NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_CLOSE_WAIT "ip_conntrack_tcp_timeout_close_wait" no longer used */
    /* NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_LAST_ACK "ip_conntrack_tcp_timeout_last_ack" no longer used */
    /* NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_TIME_WAIT "ip_conntrack_tcp_timeout_time_wait" no longer used */
    /* NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_CLOSE "ip_conntrack_tcp_timeout_close" no longer used */

    /* NET_IPV4_NF_CONNTRACK_UDP_TIMEOUT "ip_conntrack_udp_timeout" no longer used */
    /* NET_IPV4_NF_CONNTRACK_UDP_TIMEOUT_STREAM "ip_conntrack_udp_timeout_stream" no longer used */
    /* NET_IPV4_NF_CONNTRACK_ICMP_TIMEOUT "ip_conntrack_icmp_timeout" no longer used */
    /* NET_IPV4_NF_CONNTRACK_GENERIC_TIMEOUT "ip_conntrack_generic_timeout" no longer used */

    { CTL_INT,  NET_IPV4_NF_CONNTRACK_BUCKETS,      "ip_conntrack_buckets" },
    { CTL_INT,  NET_IPV4_NF_CONNTRACK_LOG_INVALID,  "ip_conntrack_log_invalid" },
    /* NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_MAX_RETRANS "ip_conntrack_tcp_timeout_max_retrans" no longer used */
    { CTL_INT,  NET_IPV4_NF_CONNTRACK_TCP_LOOSE,    "ip_conntrack_tcp_loose" },
    { CTL_INT,  NET_IPV4_NF_CONNTRACK_TCP_BE_LIBERAL,   "ip_conntrack_tcp_be_liberal" },
    { CTL_INT,  NET_IPV4_NF_CONNTRACK_TCP_MAX_RETRANS,  "ip_conntrack_tcp_max_retrans" },

    /* NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_CLOSED "ip_conntrack_sctp_timeout_closed" no longer used */
    /* NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_WAIT "ip_conntrack_sctp_timeout_cookie_wait" no longer used */
    /* NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_ECHOED "ip_conntrack_sctp_timeout_cookie_echoed" no longer used */
    /* NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_ESTABLISHED "ip_conntrack_sctp_timeout_established" no longer used */
    /* NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_SENT "ip_conntrack_sctp_timeout_shutdown_sent" no longer used */
    /* NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_RECD "ip_conntrack_sctp_timeout_shutdown_recd" no longer used */
    /* NET_IPV4_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_ACK_SENT "ip_conntrack_sctp_timeout_shutdown_ack_sent" no longer used */

    { CTL_INT,  NET_IPV4_NF_CONNTRACK_COUNT,        "ip_conntrack_count" },
    { CTL_INT,  NET_IPV4_NF_CONNTRACK_CHECKSUM,     "ip_conntrack_checksum" },
    {}
};

static const struct bin_table bin_net_ipv4_table[] = {
    {CTL_INT,   NET_IPV4_FORWARD,           "ip_forward" },

    { CTL_DIR,  NET_IPV4_CONF,      "conf",     bin_net_ipv4_conf_table },
    { CTL_DIR,  NET_IPV4_NEIGH,     "neigh",    bin_net_neigh_table },
    { CTL_DIR,  NET_IPV4_ROUTE,     "route",    bin_net_ipv4_route_table },
    /* NET_IPV4_FIB_HASH unused */
    { CTL_DIR,  NET_IPV4_NETFILTER, "netfilter",    bin_net_ipv4_netfilter_table },

    { CTL_INT,  NET_IPV4_TCP_TIMESTAMPS,        "tcp_timestamps" },
    { CTL_INT,  NET_IPV4_TCP_WINDOW_SCALING,        "tcp_window_scaling" },
    { CTL_INT,  NET_IPV4_TCP_SACK,          "tcp_sack" },
    { CTL_INT,  NET_IPV4_TCP_RETRANS_COLLAPSE,      "tcp_retrans_collapse" },
    { CTL_INT,  NET_IPV4_DEFAULT_TTL,           "ip_default_ttl" },
    /* NET_IPV4_AUTOCONFIG unused */
    { CTL_INT,  NET_IPV4_NO_PMTU_DISC,          "ip_no_pmtu_disc" },
    { CTL_INT,  NET_IPV4_NONLOCAL_BIND,         "ip_nonlocal_bind" },
    { CTL_INT,  NET_IPV4_TCP_SYN_RETRIES,       "tcp_syn_retries" },
    { CTL_INT,  NET_TCP_SYNACK_RETRIES,         "tcp_synack_retries" },
    { CTL_INT,  NET_TCP_MAX_ORPHANS,            "tcp_max_orphans" },
    { CTL_INT,  NET_TCP_MAX_TW_BUCKETS,         "tcp_max_tw_buckets" },
    { CTL_INT,  NET_IPV4_DYNADDR,           "ip_dynaddr" },
    { CTL_INT,  NET_IPV4_TCP_KEEPALIVE_TIME,        "tcp_keepalive_time" },
    { CTL_INT,  NET_IPV4_TCP_KEEPALIVE_PROBES,      "tcp_keepalive_probes" },
    { CTL_INT,  NET_IPV4_TCP_KEEPALIVE_INTVL,       "tcp_keepalive_intvl" },
    { CTL_INT,  NET_IPV4_TCP_RETRIES1,          "tcp_retries1" },
    { CTL_INT,  NET_IPV4_TCP_RETRIES2,          "tcp_retries2" },
    { CTL_INT,  NET_IPV4_TCP_FIN_TIMEOUT,       "tcp_fin_timeout" },
    { CTL_INT,  NET_TCP_SYNCOOKIES,         "tcp_syncookies" },
    { CTL_INT,  NET_TCP_TW_RECYCLE,         "tcp_tw_recycle" },
    { CTL_INT,  NET_TCP_ABORT_ON_OVERFLOW,      "tcp_abort_on_overflow" },
    { CTL_INT,  NET_TCP_STDURG,             "tcp_stdurg" },
    { CTL_INT,  NET_TCP_RFC1337,            "tcp_rfc1337" },
    { CTL_INT,  NET_TCP_MAX_SYN_BACKLOG,        "tcp_max_syn_backlog" },
    { CTL_INT,  NET_IPV4_LOCAL_PORT_RANGE,      "ip_local_port_range" },
    { CTL_INT,  NET_IPV4_IGMP_MAX_MEMBERSHIPS,      "igmp_max_memberships" },
    { CTL_INT,  NET_IPV4_IGMP_MAX_MSF,          "igmp_max_msf" },
    { CTL_INT,  NET_IPV4_INET_PEER_THRESHOLD,       "inet_peer_threshold" },
    { CTL_INT,  NET_IPV4_INET_PEER_MINTTL,      "inet_peer_minttl" },
    { CTL_INT,  NET_IPV4_INET_PEER_MAXTTL,      "inet_peer_maxttl" },
    { CTL_INT,  NET_IPV4_INET_PEER_GC_MINTIME,      "inet_peer_gc_mintime" },
    { CTL_INT,  NET_IPV4_INET_PEER_GC_MAXTIME,      "inet_peer_gc_maxtime" },
    { CTL_INT,  NET_TCP_ORPHAN_RETRIES,         "tcp_orphan_retries" },
    { CTL_INT,  NET_TCP_FACK,               "tcp_fack" },
    { CTL_INT,  NET_TCP_REORDERING,         "tcp_reordering" },
    { CTL_INT,  NET_TCP_ECN,                "tcp_ecn" },
    { CTL_INT,  NET_TCP_DSACK,              "tcp_dsack" },
    { CTL_INT,  NET_TCP_MEM,                "tcp_mem" },
    { CTL_INT,  NET_TCP_WMEM,               "tcp_wmem" },
    { CTL_INT,  NET_TCP_RMEM,               "tcp_rmem" },
    { CTL_INT,  NET_TCP_APP_WIN,            "tcp_app_win" },
    { CTL_INT,  NET_TCP_ADV_WIN_SCALE,          "tcp_adv_win_scale" },
    { CTL_INT,  NET_TCP_TW_REUSE,           "tcp_tw_reuse" },
    { CTL_INT,  NET_TCP_FRTO,               "tcp_frto" },
    { CTL_INT,  NET_TCP_FRTO_RESPONSE,          "tcp_frto_response" },
    { CTL_INT,  NET_TCP_LOW_LATENCY,            "tcp_low_latency" },
    { CTL_INT,  NET_TCP_NO_METRICS_SAVE,        "tcp_no_metrics_save" },
    { CTL_INT,  NET_TCP_MODERATE_RCVBUF,        "tcp_moderate_rcvbuf" },
    { CTL_INT,  NET_TCP_TSO_WIN_DIVISOR,        "tcp_tso_win_divisor" },
    { CTL_STR,  NET_TCP_CONG_CONTROL,           "tcp_congestion_control" },
    { CTL_INT,  NET_TCP_ABC,                "tcp_abc" },
    { CTL_INT,  NET_TCP_MTU_PROBING,            "tcp_mtu_probing" },
    { CTL_INT,  NET_TCP_BASE_MSS,           "tcp_base_mss" },
    { CTL_INT,  NET_IPV4_TCP_WORKAROUND_SIGNED_WINDOWS, "tcp_workaround_signed_windows" },
    { CTL_INT,  NET_TCP_DMA_COPYBREAK,          "tcp_dma_copybreak" },
    { CTL_INT,  NET_TCP_SLOW_START_AFTER_IDLE,      "tcp_slow_start_after_idle" },
    { CTL_INT,  NET_CIPSOV4_CACHE_ENABLE,       "cipso_cache_enable" },
    { CTL_INT,  NET_CIPSOV4_CACHE_BUCKET_SIZE,      "cipso_cache_bucket_size" },
    { CTL_INT,  NET_CIPSOV4_RBM_OPTFMT,         "cipso_rbm_optfmt" },
    { CTL_INT,  NET_CIPSOV4_RBM_STRICTVALID,        "cipso_rbm_strictvalid" },
    /* NET_TCP_AVAIL_CONG_CONTROL "tcp_available_congestion_control" no longer used */
    { CTL_STR,  NET_TCP_ALLOWED_CONG_CONTROL,       "tcp_allowed_congestion_control" },
    { CTL_INT,  NET_TCP_MAX_SSTHRESH,           "tcp_max_ssthresh" },

    { CTL_INT,  NET_IPV4_ICMP_ECHO_IGNORE_ALL,      "icmp_echo_ignore_all" },
    { CTL_INT,  NET_IPV4_ICMP_ECHO_IGNORE_BROADCASTS,   "icmp_echo_ignore_broadcasts" },
    { CTL_INT,  NET_IPV4_ICMP_IGNORE_BOGUS_ERROR_RESPONSES, "icmp_ignore_bogus_error_responses" },
    { CTL_INT,  NET_IPV4_ICMP_ERRORS_USE_INBOUND_IFADDR,    "icmp_errors_use_inbound_ifaddr" },
    { CTL_INT,  NET_IPV4_ICMP_RATELIMIT,        "icmp_ratelimit" },
    { CTL_INT,  NET_IPV4_ICMP_RATEMASK,         "icmp_ratemask" },

    { CTL_INT,  NET_IPV4_IPFRAG_HIGH_THRESH,        "ipfrag_high_thresh" },
    { CTL_INT,  NET_IPV4_IPFRAG_LOW_THRESH,     "ipfrag_low_thresh" },
    { CTL_INT,  NET_IPV4_IPFRAG_TIME,           "ipfrag_time" },

    { CTL_INT,  NET_IPV4_IPFRAG_SECRET_INTERVAL,    "ipfrag_secret_interval" },
    /* NET_IPV4_IPFRAG_MAX_DIST "ipfrag_max_dist" no longer used */

    { CTL_INT,  2088 /* NET_IPQ_QMAX */,        "ip_queue_maxlen" },

    /* NET_TCP_DEFAULT_WIN_SCALE unused */
    /* NET_TCP_BIC_BETA unused */
    /* NET_IPV4_TCP_MAX_KA_PROBES unused */
    /* NET_IPV4_IP_MASQ_DEBUG unused */
    /* NET_TCP_SYN_TAILDROP unused */
    /* NET_IPV4_ICMP_SOURCEQUENCH_RATE unused */
    /* NET_IPV4_ICMP_DESTUNREACH_RATE unused */
    /* NET_IPV4_ICMP_TIMEEXCEED_RATE unused */
    /* NET_IPV4_ICMP_PARAMPROB_RATE unused */
    /* NET_IPV4_ICMP_ECHOREPLY_RATE unused */
    /* NET_IPV4_ALWAYS_DEFRAG unused */
    {}
};

static const struct bin_table bin_net_ipx_table[] = {
    { CTL_INT,  NET_IPX_PPROP_BROADCASTING, "ipx_pprop_broadcasting" },
    /* NET_IPX_FORWARDING unused */
    {}
};

static const struct bin_table bin_net_atalk_table[] = {
    { CTL_INT,  NET_ATALK_AARP_EXPIRY_TIME,     "aarp-expiry-time" },
    { CTL_INT,  NET_ATALK_AARP_TICK_TIME,       "aarp-tick-time" },
    { CTL_INT,  NET_ATALK_AARP_RETRANSMIT_LIMIT,    "aarp-retransmit-limit" },
    { CTL_INT,  NET_ATALK_AARP_RESOLVE_TIME,        "aarp-resolve-time" },
    {},
};

static const struct bin_table bin_net_netrom_table[] = {
    { CTL_INT,  NET_NETROM_DEFAULT_PATH_QUALITY,        "default_path_quality" },
    { CTL_INT,  NET_NETROM_OBSOLESCENCE_COUNT_INITIALISER,  "obsolescence_count_initialiser" },
    { CTL_INT,  NET_NETROM_NETWORK_TTL_INITIALISER,     "network_ttl_initialiser" },
    { CTL_INT,  NET_NETROM_TRANSPORT_TIMEOUT,           "transport_timeout" },
    { CTL_INT,  NET_NETROM_TRANSPORT_MAXIMUM_TRIES,     "transport_maximum_tries" },
    { CTL_INT,  NET_NETROM_TRANSPORT_ACKNOWLEDGE_DELAY,     "transport_acknowledge_delay" },
    { CTL_INT,  NET_NETROM_TRANSPORT_BUSY_DELAY,        "transport_busy_delay" },
    { CTL_INT,  NET_NETROM_TRANSPORT_REQUESTED_WINDOW_SIZE, "transport_requested_window_size" },
    { CTL_INT,  NET_NETROM_TRANSPORT_NO_ACTIVITY_TIMEOUT,   "transport_no_activity_timeout" },
    { CTL_INT,  NET_NETROM_ROUTING_CONTROL,         "routing_control" },
    { CTL_INT,  NET_NETROM_LINK_FAILS_COUNT,            "link_fails_count" },
    { CTL_INT,  NET_NETROM_RESET,               "reset" },
    {}
};

static const struct bin_table bin_net_ax25_param_table[] = {
    { CTL_INT,  NET_AX25_IP_DEFAULT_MODE,   "ip_default_mode" },
    { CTL_INT,  NET_AX25_DEFAULT_MODE,      "ax25_default_mode" },
    { CTL_INT,  NET_AX25_BACKOFF_TYPE,      "backoff_type" },
    { CTL_INT,  NET_AX25_CONNECT_MODE,      "connect_mode" },
    { CTL_INT,  NET_AX25_STANDARD_WINDOW,   "standard_window_size" },
    { CTL_INT,  NET_AX25_EXTENDED_WINDOW,   "extended_window_size" },
    { CTL_INT,  NET_AX25_T1_TIMEOUT,        "t1_timeout" },
    { CTL_INT,  NET_AX25_T2_TIMEOUT,        "t2_timeout" },
    { CTL_INT,  NET_AX25_T3_TIMEOUT,        "t3_timeout" },
    { CTL_INT,  NET_AX25_IDLE_TIMEOUT,      "idle_timeout" },
    { CTL_INT,  NET_AX25_N2,            "maximum_retry_count" },
    { CTL_INT,  NET_AX25_PACLEN,        "maximum_packet_length" },
    { CTL_INT,  NET_AX25_PROTOCOL,      "protocol" },
    { CTL_INT,  NET_AX25_DAMA_SLAVE_TIMEOUT,    "dama_slave_timeout" },
    {}
};

static const struct bin_table bin_net_ax25_table[] = {
    { CTL_DIR,  0, NULL, bin_net_ax25_param_table },
    {}
};

static const struct bin_table bin_net_rose_table[] = {
    { CTL_INT,  NET_ROSE_RESTART_REQUEST_TIMEOUT,   "restart_request_timeout" },
    { CTL_INT,  NET_ROSE_CALL_REQUEST_TIMEOUT,      "call_request_timeout" },
    { CTL_INT,  NET_ROSE_RESET_REQUEST_TIMEOUT,     "reset_request_timeout" },
    { CTL_INT,  NET_ROSE_CLEAR_REQUEST_TIMEOUT,     "clear_request_timeout" },
    { CTL_INT,  NET_ROSE_ACK_HOLD_BACK_TIMEOUT,     "acknowledge_hold_back_timeout" },
    { CTL_INT,  NET_ROSE_ROUTING_CONTROL,       "routing_control" },
    { CTL_INT,  NET_ROSE_LINK_FAIL_TIMEOUT,     "link_fail_timeout" },
    { CTL_INT,  NET_ROSE_MAX_VCS,           "maximum_virtual_circuits" },
    { CTL_INT,  NET_ROSE_WINDOW_SIZE,           "window_size" },
    { CTL_INT,  NET_ROSE_NO_ACTIVITY_TIMEOUT,       "no_activity_timeout" },
    {}
};

static const struct bin_table bin_net_ipv6_conf_var_table[] = {
    { CTL_INT,  NET_IPV6_FORWARDING,            "forwarding" },
    { CTL_INT,  NET_IPV6_HOP_LIMIT,         "hop_limit" },
    { CTL_INT,  NET_IPV6_MTU,               "mtu" },
    { CTL_INT,  NET_IPV6_ACCEPT_RA,         "accept_ra" },
    { CTL_INT,  NET_IPV6_ACCEPT_REDIRECTS,      "accept_redirects" },
    { CTL_INT,  NET_IPV6_AUTOCONF,          "autoconf" },
    { CTL_INT,  NET_IPV6_DAD_TRANSMITS,         "dad_transmits" },
    { CTL_INT,  NET_IPV6_RTR_SOLICITS,          "router_solicitations" },
    { CTL_INT,  NET_IPV6_RTR_SOLICIT_INTERVAL,      "router_solicitation_interval" },
    { CTL_INT,  NET_IPV6_RTR_SOLICIT_DELAY,     "router_solicitation_delay" },
    { CTL_INT,  NET_IPV6_USE_TEMPADDR,          "use_tempaddr" },
    { CTL_INT,  NET_IPV6_TEMP_VALID_LFT,        "temp_valid_lft" },
    { CTL_INT,  NET_IPV6_TEMP_PREFERED_LFT,     "temp_prefered_lft" },
    { CTL_INT,  NET_IPV6_REGEN_MAX_RETRY,       "regen_max_retry" },
    { CTL_INT,  NET_IPV6_MAX_DESYNC_FACTOR,     "max_desync_factor" },
    { CTL_INT,  NET_IPV6_MAX_ADDRESSES,         "max_addresses" },
    { CTL_INT,  NET_IPV6_FORCE_MLD_VERSION,     "force_mld_version" },
    { CTL_INT,  NET_IPV6_ACCEPT_RA_DEFRTR,      "accept_ra_defrtr" },
    { CTL_INT,  NET_IPV6_ACCEPT_RA_PINFO,       "accept_ra_pinfo" },
    { CTL_INT,  NET_IPV6_ACCEPT_RA_RTR_PREF,        "accept_ra_rtr_pref" },
    { CTL_INT,  NET_IPV6_RTR_PROBE_INTERVAL,        "router_probe_interval" },
    { CTL_INT,  NET_IPV6_ACCEPT_RA_RT_INFO_MAX_PLEN,    "accept_ra_rt_info_max_plen" },
    { CTL_INT,  NET_IPV6_PROXY_NDP,         "proxy_ndp" },
    { CTL_INT,  NET_IPV6_ACCEPT_SOURCE_ROUTE,       "accept_source_route" },
    {}
};

static const struct bin_table bin_net_ipv6_conf_table[] = {
    { CTL_DIR,  NET_PROTO_CONF_ALL,     "all",  bin_net_ipv6_conf_var_table },
    { CTL_DIR,  NET_PROTO_CONF_DEFAULT,     "default", bin_net_ipv6_conf_var_table },
    { CTL_DIR,  0, NULL, bin_net_ipv6_conf_var_table },
    {}
};

static const struct bin_table bin_net_ipv6_route_table[] = {
    /* NET_IPV6_ROUTE_FLUSH "flush"  no longer used */
    { CTL_INT,  NET_IPV6_ROUTE_GC_THRESH,       "gc_thresh" },
    { CTL_INT,  NET_IPV6_ROUTE_MAX_SIZE,        "max_size" },
    { CTL_INT,  NET_IPV6_ROUTE_GC_MIN_INTERVAL,     "gc_min_interval" },
    { CTL_INT,  NET_IPV6_ROUTE_GC_TIMEOUT,      "gc_timeout" },
    { CTL_INT,  NET_IPV6_ROUTE_GC_INTERVAL,     "gc_interval" },
    { CTL_INT,  NET_IPV6_ROUTE_GC_ELASTICITY,       "gc_elasticity" },
    { CTL_INT,  NET_IPV6_ROUTE_MTU_EXPIRES,     "mtu_expires" },
    { CTL_INT,  NET_IPV6_ROUTE_MIN_ADVMSS,      "min_adv_mss" },
    { CTL_INT,  NET_IPV6_ROUTE_GC_MIN_INTERVAL_MS,  "gc_min_interval_ms" },
    {}
};

static const struct bin_table bin_net_ipv6_icmp_table[] = {
    { CTL_INT,  NET_IPV6_ICMP_RATELIMIT,    "ratelimit" },
    {}
};

static const struct bin_table bin_net_ipv6_table[] = {
    { CTL_DIR,  NET_IPV6_CONF,      "conf",     bin_net_ipv6_conf_table },
    { CTL_DIR,  NET_IPV6_NEIGH,     "neigh",    bin_net_neigh_table },
    { CTL_DIR,  NET_IPV6_ROUTE,     "route",    bin_net_ipv6_route_table },
    { CTL_DIR,  NET_IPV6_ICMP,      "icmp",     bin_net_ipv6_icmp_table },
    { CTL_INT,  NET_IPV6_BINDV6ONLY,        "bindv6only" },
    { CTL_INT,  NET_IPV6_IP6FRAG_HIGH_THRESH,   "ip6frag_high_thresh" },
    { CTL_INT,  NET_IPV6_IP6FRAG_LOW_THRESH,    "ip6frag_low_thresh" },
    { CTL_INT,  NET_IPV6_IP6FRAG_TIME,      "ip6frag_time" },
    { CTL_INT,  NET_IPV6_IP6FRAG_SECRET_INTERVAL,   "ip6frag_secret_interval" },
    { CTL_INT,  NET_IPV6_MLD_MAX_MSF,       "mld_max_msf" },
    { CTL_INT,  2088 /* IPQ_QMAX */,        "ip6_queue_maxlen" },
    {}
};

static const struct bin_table bin_net_x25_table[] = {
    { CTL_INT,  NET_X25_RESTART_REQUEST_TIMEOUT,    "restart_request_timeout" },
    { CTL_INT,  NET_X25_CALL_REQUEST_TIMEOUT,       "call_request_timeout" },
    { CTL_INT,  NET_X25_RESET_REQUEST_TIMEOUT,  "reset_request_timeout" },
    { CTL_INT,  NET_X25_CLEAR_REQUEST_TIMEOUT,  "clear_request_timeout" },
    { CTL_INT,  NET_X25_ACK_HOLD_BACK_TIMEOUT,  "acknowledgement_hold_back_timeout" },
    { CTL_INT,  NET_X25_FORWARD,            "x25_forward" },
    {}
};

static const struct bin_table bin_net_tr_table[] = {
    { CTL_INT,  NET_TR_RIF_TIMEOUT, "rif_timeout" },
    {}
};


static const struct bin_table bin_net_decnet_conf_vars[] = {
    { CTL_INT,  NET_DECNET_CONF_DEV_FORWARDING, "forwarding" },
    { CTL_INT,  NET_DECNET_CONF_DEV_PRIORITY,   "priority" },
    { CTL_INT,  NET_DECNET_CONF_DEV_T2,     "t2" },
    { CTL_INT,  NET_DECNET_CONF_DEV_T3,     "t3" },
    {}
};

static const struct bin_table bin_net_decnet_conf[] = {
    { CTL_DIR, NET_DECNET_CONF_ETHER,    "ethernet", bin_net_decnet_conf_vars },
    { CTL_DIR, NET_DECNET_CONF_GRE,      "ipgre",    bin_net_decnet_conf_vars },
    { CTL_DIR, NET_DECNET_CONF_X25,      "x25",      bin_net_decnet_conf_vars },
    { CTL_DIR, NET_DECNET_CONF_PPP,      "ppp",      bin_net_decnet_conf_vars },
    { CTL_DIR, NET_DECNET_CONF_DDCMP,    "ddcmp",    bin_net_decnet_conf_vars },
    { CTL_DIR, NET_DECNET_CONF_LOOPBACK, "loopback", bin_net_decnet_conf_vars },
    { CTL_DIR, 0,                NULL,   bin_net_decnet_conf_vars },
    {}
};

static const struct bin_table bin_net_decnet_table[] = {
    { CTL_DIR,  NET_DECNET_CONF,        "conf", bin_net_decnet_conf },
    { CTL_DNADR,    NET_DECNET_NODE_ADDRESS,    "node_address" },
    { CTL_STR,  NET_DECNET_NODE_NAME,       "node_name" },
    { CTL_STR,  NET_DECNET_DEFAULT_DEVICE,  "default_device" },
    { CTL_INT,  NET_DECNET_TIME_WAIT,       "time_wait" },
    { CTL_INT,  NET_DECNET_DN_COUNT,        "dn_count" },
    { CTL_INT,  NET_DECNET_DI_COUNT,        "di_count" },
    { CTL_INT,  NET_DECNET_DR_COUNT,        "dr_count" },
    { CTL_INT,  NET_DECNET_DST_GC_INTERVAL, "dst_gc_interval" },
    { CTL_INT,  NET_DECNET_NO_FC_MAX_CWND,  "no_fc_max_cwnd" },
    { CTL_INT,  NET_DECNET_MEM,     "decnet_mem" },
    { CTL_INT,  NET_DECNET_RMEM,        "decnet_rmem" },
    { CTL_INT,  NET_DECNET_WMEM,        "decnet_wmem" },
    { CTL_INT,  NET_DECNET_DEBUG_LEVEL, "debug" },
    {}
};

static const struct bin_table bin_net_sctp_table[] = {
    { CTL_INT,  NET_SCTP_RTO_INITIAL,       "rto_initial" },
    { CTL_INT,  NET_SCTP_RTO_MIN,       "rto_min" },
    { CTL_INT,  NET_SCTP_RTO_MAX,       "rto_max" },
    { CTL_INT,  NET_SCTP_RTO_ALPHA,     "rto_alpha_exp_divisor" },
    { CTL_INT,  NET_SCTP_RTO_BETA,      "rto_beta_exp_divisor" },
    { CTL_INT,  NET_SCTP_VALID_COOKIE_LIFE, "valid_cookie_life" },
    { CTL_INT,  NET_SCTP_ASSOCIATION_MAX_RETRANS,   "association_max_retrans" },
    { CTL_INT,  NET_SCTP_PATH_MAX_RETRANS,  "path_max_retrans" },
    { CTL_INT,  NET_SCTP_MAX_INIT_RETRANSMITS,  "max_init_retransmits" },
    { CTL_INT,  NET_SCTP_HB_INTERVAL,       "hb_interval" },
    { CTL_INT,  NET_SCTP_PRESERVE_ENABLE,   "cookie_preserve_enable" },
    { CTL_INT,  NET_SCTP_MAX_BURST,     "max_burst" },
    { CTL_INT,  NET_SCTP_ADDIP_ENABLE,      "addip_enable" },
    { CTL_INT,  NET_SCTP_PRSCTP_ENABLE,     "prsctp_enable" },
    { CTL_INT,  NET_SCTP_SNDBUF_POLICY,     "sndbuf_policy" },
    { CTL_INT,  NET_SCTP_SACK_TIMEOUT,      "sack_timeout" },
    { CTL_INT,  NET_SCTP_RCVBUF_POLICY,     "rcvbuf_policy" },
    {}
};

static const struct bin_table bin_net_llc_llc2_timeout_table[] = {
    { CTL_INT,  NET_LLC2_ACK_TIMEOUT,   "ack" },
    { CTL_INT,  NET_LLC2_P_TIMEOUT, "p" },
    { CTL_INT,  NET_LLC2_REJ_TIMEOUT,   "rej" },
    { CTL_INT,  NET_LLC2_BUSY_TIMEOUT,  "busy" },
    {}
};

static const struct bin_table bin_net_llc_station_table[] = {
    { CTL_INT,  NET_LLC_STATION_ACK_TIMEOUT,    "ack_timeout" },
    {}
};

static const struct bin_table bin_net_llc_llc2_table[] = {
    { CTL_DIR,  NET_LLC2,       "timeout",  bin_net_llc_llc2_timeout_table },
    {}
};

static const struct bin_table bin_net_llc_table[] = {
    { CTL_DIR,  NET_LLC2,       "llc2",     bin_net_llc_llc2_table },
    { CTL_DIR,  NET_LLC_STATION,    "station",  bin_net_llc_station_table },
    {}
};

static const struct bin_table bin_net_netfilter_table[] = {
    { CTL_INT,  NET_NF_CONNTRACK_MAX,           "nf_conntrack_max" },
    /* NET_NF_CONNTRACK_TCP_TIMEOUT_SYN_SENT "nf_conntrack_tcp_timeout_syn_sent" no longer used */
    /* NET_NF_CONNTRACK_TCP_TIMEOUT_SYN_RECV "nf_conntrack_tcp_timeout_syn_recv" no longer used */
    /* NET_NF_CONNTRACK_TCP_TIMEOUT_ESTABLISHED "nf_conntrack_tcp_timeout_established" no longer used */
    /* NET_NF_CONNTRACK_TCP_TIMEOUT_FIN_WAIT "nf_conntrack_tcp_timeout_fin_wait" no longer used */
    /* NET_NF_CONNTRACK_TCP_TIMEOUT_CLOSE_WAIT "nf_conntrack_tcp_timeout_close_wait" no longer used */
    /* NET_NF_CONNTRACK_TCP_TIMEOUT_LAST_ACK "nf_conntrack_tcp_timeout_last_ack" no longer used */
    /* NET_NF_CONNTRACK_TCP_TIMEOUT_TIME_WAIT "nf_conntrack_tcp_timeout_time_wait" no longer used */
    /* NET_NF_CONNTRACK_TCP_TIMEOUT_CLOSE "nf_conntrack_tcp_timeout_close" no longer used */
    /* NET_NF_CONNTRACK_UDP_TIMEOUT "nf_conntrack_udp_timeout" no longer used */
    /* NET_NF_CONNTRACK_UDP_TIMEOUT_STREAM "nf_conntrack_udp_timeout_stream" no longer used */
    /* NET_NF_CONNTRACK_ICMP_TIMEOUT "nf_conntrack_icmp_timeout" no longer used */
    /* NET_NF_CONNTRACK_GENERIC_TIMEOUT "nf_conntrack_generic_timeout" no longer used */
    { CTL_INT,  NET_NF_CONNTRACK_BUCKETS,       "nf_conntrack_buckets" },
    { CTL_INT,  NET_NF_CONNTRACK_LOG_INVALID,       "nf_conntrack_log_invalid" },
    /* NET_NF_CONNTRACK_TCP_TIMEOUT_MAX_RETRANS "nf_conntrack_tcp_timeout_max_retrans" no longer used */
    { CTL_INT,  NET_NF_CONNTRACK_TCP_LOOSE,     "nf_conntrack_tcp_loose" },
    { CTL_INT,  NET_NF_CONNTRACK_TCP_BE_LIBERAL,    "nf_conntrack_tcp_be_liberal" },
    { CTL_INT,  NET_NF_CONNTRACK_TCP_MAX_RETRANS,   "nf_conntrack_tcp_max_retrans" },
    /* NET_NF_CONNTRACK_SCTP_TIMEOUT_CLOSED "nf_conntrack_sctp_timeout_closed" no longer used */
    /* NET_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_WAIT "nf_conntrack_sctp_timeout_cookie_wait" no longer used */
    /* NET_NF_CONNTRACK_SCTP_TIMEOUT_COOKIE_ECHOED "nf_conntrack_sctp_timeout_cookie_echoed" no longer used */
    /* NET_NF_CONNTRACK_SCTP_TIMEOUT_ESTABLISHED "nf_conntrack_sctp_timeout_established" no longer used */
    /* NET_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_SENT "nf_conntrack_sctp_timeout_shutdown_sent" no longer used */
    /* NET_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_RECD "nf_conntrack_sctp_timeout_shutdown_recd" no longer used */
    /* NET_NF_CONNTRACK_SCTP_TIMEOUT_SHUTDOWN_ACK_SENT "nf_conntrack_sctp_timeout_shutdown_ack_sent" no longer used */
    { CTL_INT,  NET_NF_CONNTRACK_COUNT,         "nf_conntrack_count" },
    /* NET_NF_CONNTRACK_ICMPV6_TIMEOUT "nf_conntrack_icmpv6_timeout" no longer used */
    /* NET_NF_CONNTRACK_FRAG6_TIMEOUT "nf_conntrack_frag6_timeout" no longer used */
    { CTL_INT,  NET_NF_CONNTRACK_FRAG6_LOW_THRESH,  "nf_conntrack_frag6_low_thresh" },
    { CTL_INT,  NET_NF_CONNTRACK_FRAG6_HIGH_THRESH, "nf_conntrack_frag6_high_thresh" },
    { CTL_INT,  NET_NF_CONNTRACK_CHECKSUM,      "nf_conntrack_checksum" },

    {}
};

static const struct bin_table bin_net_irda_table[] = {
    { CTL_INT,  NET_IRDA_DISCOVERY,     "discovery" },
    { CTL_STR,  NET_IRDA_DEVNAME,       "devname" },
    { CTL_INT,  NET_IRDA_DEBUG,         "debug" },
    { CTL_INT,  NET_IRDA_FAST_POLL,     "fast_poll_increase" },
    { CTL_INT,  NET_IRDA_DISCOVERY_SLOTS,   "discovery_slots" },
    { CTL_INT,  NET_IRDA_DISCOVERY_TIMEOUT, "discovery_timeout" },
    { CTL_INT,  NET_IRDA_SLOT_TIMEOUT,      "slot_timeout" },
    { CTL_INT,  NET_IRDA_MAX_BAUD_RATE,     "max_baud_rate" },
    { CTL_INT,  NET_IRDA_MIN_TX_TURN_TIME,  "min_tx_turn_time" },
    { CTL_INT,  NET_IRDA_MAX_TX_DATA_SIZE,  "max_tx_data_size" },
    { CTL_INT,  NET_IRDA_MAX_TX_WINDOW,     "max_tx_window" },
    { CTL_INT,  NET_IRDA_MAX_NOREPLY_TIME,  "max_noreply_time" },
    { CTL_INT,  NET_IRDA_WARN_NOREPLY_TIME, "warn_noreply_time" },
    { CTL_INT,  NET_IRDA_LAP_KEEPALIVE_TIME,    "lap_keepalive_time" },
    {}
};

static const struct bin_table bin_net_table[] = {
    { CTL_DIR,  NET_CORE,       "core",     bin_net_core_table },
    /* NET_ETHER not used */
    /* NET_802 not used */
    { CTL_DIR,  NET_UNIX,       "unix",     bin_net_unix_table },
    { CTL_DIR,  NET_IPV4,       "ipv4",     bin_net_ipv4_table },
    { CTL_DIR,  NET_IPX,        "ipx",      bin_net_ipx_table },
    { CTL_DIR,  NET_ATALK,      "appletalk",    bin_net_atalk_table },
    { CTL_DIR,  NET_NETROM,     "netrom",   bin_net_netrom_table },
    { CTL_DIR,  NET_AX25,       "ax25",     bin_net_ax25_table },
    /*  NET_BRIDGE "bridge" no longer used */
    { CTL_DIR,  NET_ROSE,       "rose",     bin_net_rose_table },
    { CTL_DIR,  NET_IPV6,       "ipv6",     bin_net_ipv6_table },
    { CTL_DIR,  NET_X25,        "x25",      bin_net_x25_table },
    { CTL_DIR,  NET_TR,         "token-ring",   bin_net_tr_table },
    { CTL_DIR,  NET_DECNET,     "decnet",   bin_net_decnet_table },
    /*  NET_ECONET not used */
    { CTL_DIR,  NET_SCTP,       "sctp",     bin_net_sctp_table },
    { CTL_DIR,  NET_LLC,        "llc",      bin_net_llc_table },
    { CTL_DIR,  NET_NETFILTER,      "netfilter",    bin_net_netfilter_table },
    /* NET_DCCP "dccp" no longer used */
    { CTL_DIR,  NET_IRDA,       "irda",     bin_net_irda_table },
    { CTL_INT,  2089,           "nf_conntrack_max" },
    {}
};

static const struct bin_table bin_fs_quota_table[] = {
    { CTL_INT,  FS_DQ_LOOKUPS,      "lookups" },
    { CTL_INT,  FS_DQ_DROPS,        "drops" },
    { CTL_INT,  FS_DQ_READS,        "reads" },
    { CTL_INT,  FS_DQ_WRITES,       "writes" },
    { CTL_INT,  FS_DQ_CACHE_HITS,   "cache_hits" },
    { CTL_INT,  FS_DQ_ALLOCATED,    "allocated_dquots" },
    { CTL_INT,  FS_DQ_FREE,     "free_dquots" },
    { CTL_INT,  FS_DQ_SYNCS,        "syncs" },
    { CTL_INT,  FS_DQ_WARNINGS,     "warnings" },
    {}
};

static const struct bin_table bin_fs_xfs_table[] = {
    { CTL_INT,  XFS_SGID_INHERIT,   "irix_sgid_inherit" },
    { CTL_INT,  XFS_SYMLINK_MODE,   "irix_symlink_mode" },
    { CTL_INT,  XFS_PANIC_MASK,     "panic_mask" },

    { CTL_INT,  XFS_ERRLEVEL,       "error_level" },
    { CTL_INT,  XFS_SYNCD_TIMER,    "xfssyncd_centisecs" },
    { CTL_INT,  XFS_INHERIT_SYNC,   "inherit_sync" },
    { CTL_INT,  XFS_INHERIT_NODUMP, "inherit_nodump" },
    { CTL_INT,  XFS_INHERIT_NOATIME,    "inherit_noatime" },
    { CTL_INT,  XFS_BUF_TIMER,      "xfsbufd_centisecs" },
    { CTL_INT,  XFS_BUF_AGE,        "age_buffer_centisecs" },
    { CTL_INT,  XFS_INHERIT_NOSYM,  "inherit_nosymlinks" },
    { CTL_INT,  XFS_ROTORSTEP,  "rotorstep" },
    { CTL_INT,  XFS_INHERIT_NODFRG, "inherit_nodefrag" },
    { CTL_INT,  XFS_FILESTREAM_TIMER,   "filestream_centisecs" },
    { CTL_INT,  XFS_STATS_CLEAR,    "stats_clear" },
    {}
};

static const struct bin_table bin_fs_ocfs2_nm_table[] = {
    { CTL_STR,  1, "hb_ctl_path" },
    {}
};

static const struct bin_table bin_fs_ocfs2_table[] = {
    { CTL_DIR,  1,  "nm",   bin_fs_ocfs2_nm_table },
    {}
};

static const struct bin_table bin_inotify_table[] = {
    { CTL_INT,  INOTIFY_MAX_USER_INSTANCES, "max_user_instances" },
    { CTL_INT,  INOTIFY_MAX_USER_WATCHES,   "max_user_watches" },
    { CTL_INT,  INOTIFY_MAX_QUEUED_EVENTS,  "max_queued_events" },
    {}
};

static const struct bin_table bin_fs_table[] = {
    { CTL_INT,  FS_NRINODE,     "inode-nr" },
    { CTL_INT,  FS_STATINODE,       "inode-state" },
    /* FS_MAXINODE unused */
    /* FS_NRDQUOT unused */
    /* FS_MAXDQUOT unused */
    /* FS_NRFILE "file-nr" no longer used */
    { CTL_INT,  FS_MAXFILE,     "file-max" },
    { CTL_INT,  FS_DENTRY,      "dentry-state" },
    /* FS_NRSUPER unused */
    /* FS_MAXUPSER unused */
    { CTL_INT,  FS_OVERFLOWUID,     "overflowuid" },
    { CTL_INT,  FS_OVERFLOWGID,     "overflowgid" },
    { CTL_INT,  FS_LEASES,      "leases-enable" },
    { CTL_INT,  FS_DIR_NOTIFY,      "dir-notify-enable" },
    { CTL_INT,  FS_LEASE_TIME,      "lease-break-time" },
    { CTL_DIR,  FS_DQSTATS,     "quota",    bin_fs_quota_table },
    { CTL_DIR,  FS_XFS,         "xfs",      bin_fs_xfs_table },
    { CTL_ULONG,    FS_AIO_NR,      "aio-nr" },
    { CTL_ULONG,    FS_AIO_MAX_NR,      "aio-max-nr" },
    { CTL_DIR,  FS_INOTIFY,     "inotify",  bin_inotify_table },
    { CTL_DIR,  FS_OCFS2,       "ocfs2",    bin_fs_ocfs2_table },
    { CTL_INT,  KERN_SETUID_DUMPABLE,   "suid_dumpable" },
    {}
};

static const struct bin_table bin_ipmi_table[] = {
    { CTL_INT,  DEV_IPMI_POWEROFF_POWERCYCLE,   "poweroff_powercycle" },
    {}
};

static const struct bin_table bin_mac_hid_files[] = {
    /* DEV_MAC_HID_KEYBOARD_SENDS_LINUX_KEYCODES unused */
    /* DEV_MAC_HID_KEYBOARD_LOCK_KEYCODES unused */
    { CTL_INT,  DEV_MAC_HID_MOUSE_BUTTON_EMULATION, "mouse_button_emulation" },
    { CTL_INT,  DEV_MAC_HID_MOUSE_BUTTON2_KEYCODE,  "mouse_button2_keycode" },
    { CTL_INT,  DEV_MAC_HID_MOUSE_BUTTON3_KEYCODE,  "mouse_button3_keycode" },
    /* DEV_MAC_HID_ADB_MOUSE_SENDS_KEYCODES unused */
    {}
};

static const struct bin_table bin_raid_table[] = {
    { CTL_INT,  DEV_RAID_SPEED_LIMIT_MIN,   "speed_limit_min" },
    { CTL_INT,  DEV_RAID_SPEED_LIMIT_MAX,   "speed_limit_max" },
    {}
};

static const struct bin_table bin_scsi_table[] = {
    { CTL_INT, DEV_SCSI_LOGGING_LEVEL, "logging_level" },
    {}
};

static const struct bin_table bin_dev_table[] = {
    /* DEV_CDROM    "cdrom" no longer used */
    /* DEV_HWMON unused */
    /* DEV_PARPORT  "parport" no longer used */
    { CTL_DIR,  DEV_RAID,   "raid",     bin_raid_table },
    { CTL_DIR,  DEV_MAC_HID,    "mac_hid",  bin_mac_hid_files },
    { CTL_DIR,  DEV_SCSI,   "scsi",     bin_scsi_table },
    { CTL_DIR,  DEV_IPMI,   "ipmi",     bin_ipmi_table },
    {}
};

static const struct bin_table bin_bus_isa_table[] = {
    { CTL_INT,  BUS_ISA_MEM_BASE,   "membase" },
    { CTL_INT,  BUS_ISA_PORT_BASE,  "portbase" },
    { CTL_INT,  BUS_ISA_PORT_SHIFT, "portshift" },
    {}
};

static const struct bin_table bin_bus_table[] = {
    { CTL_DIR,  CTL_BUS_ISA,    "isa",  bin_bus_isa_table },
    {}
};


static const struct bin_table bin_s390dbf_table[] = {
    { CTL_INT,  5678 /* CTL_S390DBF_STOPPABLE */, "debug_stoppable" },
    { CTL_INT,  5679 /* CTL_S390DBF_ACTIVE */,    "debug_active" },
    {}
};

static const struct bin_table bin_sunrpc_table[] = {
    /* CTL_RPCDEBUG "rpc_debug"  no longer used */
    /* CTL_NFSDEBUG "nfs_debug"  no longer used */
    /* CTL_NFSDDEBUG "nfsd_debug" no longer used  */
    /* CTL_NLMDEBUG "nlm_debug" no longer used */

    { CTL_INT,  CTL_SLOTTABLE_UDP,  "udp_slot_table_entries" },
    { CTL_INT,  CTL_SLOTTABLE_TCP,  "tcp_slot_table_entries" },
    { CTL_INT,  CTL_MIN_RESVPORT,   "min_resvport" },
    { CTL_INT,  CTL_MAX_RESVPORT,   "max_resvport" },
    {}
};

static const struct bin_table bin_pm_table[] = {
    /* frv specific */
    /* 1 == CTL_PM_SUSPEND  "suspend"  no longer used" */
    { CTL_INT,  2 /* CTL_PM_CMODE */,       "cmode" },
    { CTL_INT,  3 /* CTL_PM_P0 */,      "p0" },
    { CTL_INT,  4 /* CTL_PM_CM */,      "cm" },
    {}
};

static const struct bin_table bin_root_table[] = {
    { CTL_DIR,  CTL_KERN,   "kernel",   bin_kern_table },
    { CTL_DIR,  CTL_VM,     "vm",       bin_vm_table },
    { CTL_DIR,  CTL_NET,    "net",      bin_net_table },
    /* CTL_PROC not used */
    { CTL_DIR,  CTL_FS,     "fs",       bin_fs_table },
    /* CTL_DEBUG "debug" no longer used */
    { CTL_DIR,  CTL_DEV,    "dev",      bin_dev_table },
    { CTL_DIR,  CTL_BUS,    "bus",      bin_bus_table },
    { CTL_DIR,  CTL_ABI,    "abi" },
    /* CTL_CPU not used */
    /* CTL_ARLAN "arlan" no longer used */
    { CTL_DIR,  CTL_S390DBF,    "s390dbf",  bin_s390dbf_table },
    { CTL_DIR,  CTL_SUNRPC, "sunrpc",   bin_sunrpc_table },
    { CTL_DIR,  CTL_PM,     "pm",       bin_pm_table },
    {}
};

static ssize_t bin_dir(struct file *file,
    void __user *oldval, size_t oldlen, void __user *newval, size_t newlen)
{
    return -ENOTDIR;
}


static ssize_t bin_string(struct file *file,
    void __user *oldval, size_t oldlen, void __user *newval, size_t newlen)
{
    ssize_t result, copied = 0;

    if (oldval && oldlen) {
        char __user *lastp;
        loff_t pos = 0;
        int ch;

        result = vfs_read(file, oldval, oldlen, &pos);
        if (result < 0)
            goto out;

        copied = result;
        lastp = oldval + copied - 1;

        result = -EFAULT;
        if (get_user(ch, lastp))
            goto out;

        /* Trim off the trailing newline */
        if (ch == '\n') {
            result = -EFAULT;
            if (put_user('\0', lastp))
                goto out;
            copied -= 1;
        }
    }

    if (newval && newlen) {
        loff_t pos = 0;

        result = vfs_write(file, newval, newlen, &pos);
        if (result < 0)
            goto out;
    }

    result = copied;
out:
    return result;
}

static ssize_t bin_intvec(struct file *file,
    void __user *oldval, size_t oldlen, void __user *newval, size_t newlen)
{
    mm_segment_t old_fs = get_fs();
    ssize_t copied = 0;
    char *buffer;
    ssize_t result;

    result = -ENOMEM;
    buffer = kmalloc(BUFSZ, GFP_KERNEL);
    if (!buffer)
        goto out;

    if (oldval && oldlen) {
        unsigned __user *vec = oldval;
        size_t length = oldlen / sizeof(*vec);
        loff_t pos = 0;
        char *str, *end;
        int i;

        set_fs(KERNEL_DS);
        result = vfs_read(file, buffer, BUFSZ - 1, &pos);
        set_fs(old_fs);
        if (result < 0)
            goto out_kfree;

        str = buffer;
        end = str + result;
        *end++ = '\0';
        for (i = 0; i < length; i++) {
            unsigned long value;

            value = simple_strtoul(str, &str, 10);
            while (isspace(*str))
                str++;
            
            result = -EFAULT;
            if (put_user(value, vec + i))
                goto out_kfree;

            copied += sizeof(*vec);
            if (!isdigit(*str))
                break;
        }
    }

    if (newval && newlen) {
        unsigned __user *vec = newval;
        size_t length = newlen / sizeof(*vec);
        loff_t pos = 0;
        char *str, *end;
        int i;

        str = buffer;
        end = str + BUFSZ;
        for (i = 0; i < length; i++) {
            unsigned long value;

            result = -EFAULT;
            if (get_user(value, vec + i))
                goto out_kfree;

            str += snprintf(str, end - str, "%lu\t", value);
        }

        set_fs(KERNEL_DS);
        result = vfs_write(file, buffer, str - buffer, &pos);
        set_fs(old_fs);
        if (result < 0)
            goto out_kfree;
    }
    result = copied;
out_kfree:
    kfree(buffer);
out:
    return result;
}

static ssize_t bin_ulongvec(struct file *file,
    void __user *oldval, size_t oldlen, void __user *newval, size_t newlen)
{
    mm_segment_t old_fs = get_fs();
    ssize_t copied = 0;
    char *buffer;
    ssize_t result;

    result = -ENOMEM;
    buffer = kmalloc(BUFSZ, GFP_KERNEL);
    if (!buffer)
        goto out;

    if (oldval && oldlen) {
        unsigned long __user *vec = oldval;
        size_t length = oldlen / sizeof(*vec);
        loff_t pos = 0;
        char *str, *end;
        int i;

        set_fs(KERNEL_DS);
        result = vfs_read(file, buffer, BUFSZ - 1, &pos);
        set_fs(old_fs);
        if (result < 0)
            goto out_kfree;

        str = buffer;
        end = str + result;
        *end++ = '\0';
        for (i = 0; i < length; i++) {
            unsigned long value;

            value = simple_strtoul(str, &str, 10);
            while (isspace(*str))
                str++;
            
            result = -EFAULT;
            if (put_user(value, vec + i))
                goto out_kfree;

            copied += sizeof(*vec);
            if (!isdigit(*str))
                break;
        }
    }

    if (newval && newlen) {
        unsigned long __user *vec = newval;
        size_t length = newlen / sizeof(*vec);
        loff_t pos = 0;
        char *str, *end;
        int i;

        str = buffer;
        end = str + BUFSZ;
        for (i = 0; i < length; i++) {
            unsigned long value;

            result = -EFAULT;
            if (get_user(value, vec + i))
                goto out_kfree;

            str += snprintf(str, end - str, "%lu\t", value);
        }

        set_fs(KERNEL_DS);
        result = vfs_write(file, buffer, str - buffer, &pos);
        set_fs(old_fs);
        if (result < 0)
            goto out_kfree;
    }
    result = copied;
out_kfree:
    kfree(buffer);
out:
    return result;
}

static ssize_t bin_uuid(struct file *file,
    void __user *oldval, size_t oldlen, void __user *newval, size_t newlen)
{
    mm_segment_t old_fs = get_fs();
    ssize_t result, copied = 0;

    /* Only supports reads */
    if (oldval && oldlen) {
        loff_t pos = 0;
        char buf[40], *str = buf;
        unsigned char uuid[16];
        int i;

        set_fs(KERNEL_DS);
        result = vfs_read(file, buf, sizeof(buf) - 1, &pos);
        set_fs(old_fs);
        if (result < 0)
            goto out;

        buf[result] = '\0';

        /* Convert the uuid to from a string to binary */
        for (i = 0; i < 16; i++) {
            result = -EIO;
            if (!isxdigit(str[0]) || !isxdigit(str[1]))
                goto out;

            uuid[i] = (hex_to_bin(str[0]) << 4) |
                    hex_to_bin(str[1]);
            str += 2;
            if (*str == '-')
                str++;
        }

        if (oldlen > 16)
            oldlen = 16;

        result = -EFAULT;
        if (copy_to_user(oldval, uuid, oldlen))
            goto out;

        copied = oldlen;
    }
    result = copied;
out:
    return result;
}

static ssize_t bin_dn_node_address(struct file *file,
    void __user *oldval, size_t oldlen, void __user *newval, size_t newlen)
{
    mm_segment_t old_fs = get_fs();
    ssize_t result, copied = 0;

    if (oldval && oldlen) {
        loff_t pos = 0;
        char buf[15], *nodep;
        unsigned long area, node;
        __le16 dnaddr;

        set_fs(KERNEL_DS);
        result = vfs_read(file, buf, sizeof(buf) - 1, &pos);
        set_fs(old_fs);
        if (result < 0)
            goto out;

        buf[result] = '\0';

        /* Convert the decnet address to binary */
        result = -EIO;
        nodep = strchr(buf, '.') + 1;
        if (!nodep)
            goto out;

        area = simple_strtoul(buf, NULL, 10);
        node = simple_strtoul(nodep, NULL, 10);

        result = -EIO;
        if ((area > 63)||(node > 1023))
            goto out;

        dnaddr = cpu_to_le16((area << 10) | node);

        result = -EFAULT;
        if (put_user(dnaddr, (__le16 __user *)oldval))
            goto out;

        copied = sizeof(dnaddr);
    }

    if (newval && newlen) {
        loff_t pos = 0;
        __le16 dnaddr;
        char buf[15];
        int len;

        result = -EINVAL;
        if (newlen != sizeof(dnaddr))
            goto out;

        result = -EFAULT;
        if (get_user(dnaddr, (__le16 __user *)newval))
            goto out;

        len = snprintf(buf, sizeof(buf), "%hu.%hu",
                le16_to_cpu(dnaddr) >> 10,
                le16_to_cpu(dnaddr) & 0x3ff);

        set_fs(KERNEL_DS);
        result = vfs_write(file, buf, len, &pos);
        set_fs(old_fs);
        if (result < 0)
            goto out;
    }

    result = copied;
out:
    return result;
}

static const struct bin_table *get_sysctl(const int *name, int nlen, char *path)
{
    const struct bin_table *table = &bin_root_table[0];
    int ctl_name;

    /* The binary sysctl tables have a small maximum depth so
     * there is no danger of overflowing our path as it PATH_MAX
     * bytes long.
     */
    memcpy(path, "sys/", 4);
    path += 4;

repeat:
    if (!nlen)
        return ERR_PTR(-ENOTDIR);
    ctl_name = *name;
    name++;
    nlen--;
    for ( ; table->convert; table++) {
        int len = 0;

        /*
         * For a wild card entry map from ifindex to network
         * device name.
         */
        if (!table->ctl_name) {
#ifdef CONFIG_NET
            struct net *net = current->nsproxy->net_ns;
            struct net_device *dev;
            dev = dev_get_by_index(net, ctl_name);
            if (dev) {
                len = strlen(dev->name);
                memcpy(path, dev->name, len);
                dev_put(dev);
            }
#endif
        /* Use the well known sysctl number to proc name mapping */
        } else if (ctl_name == table->ctl_name) {
            len = strlen(table->procname);
            memcpy(path, table->procname, len);
        }
        if (len) {
            path += len;
            if (table->child) {
                *path++ = '/';
                table = table->child;
                goto repeat;
            }
            *path = '\0';
            return table;
        }
    }
    return ERR_PTR(-ENOTDIR);
}

static char *sysctl_getname(const int *name, int nlen, const struct bin_table **tablep)
{
    char *tmp, *result;

    result = ERR_PTR(-ENOMEM);
    tmp = __getname();
    if (tmp) {
        const struct bin_table *table = get_sysctl(name, nlen, tmp);
        result = tmp;
        *tablep = table;
        if (IS_ERR(table)) {
            __putname(tmp);
            result = ERR_CAST(table);
        }
    }
    return result;
}

static ssize_t binary_sysctl(const int *name, int nlen,
    void __user *oldval, size_t oldlen, void __user *newval, size_t newlen)
{
    const struct bin_table *table = NULL;
    struct vfsmount *mnt;
    struct file *file;
    ssize_t result;
    char *pathname;
    int flags;

    pathname = sysctl_getname(name, nlen, &table);
    result = PTR_ERR(pathname);
    if (IS_ERR(pathname))
        goto out;

    /* How should the sysctl be accessed? */
    if (oldval && oldlen && newval && newlen) {
        flags = O_RDWR;
    } else if (newval && newlen) {
        flags = O_WRONLY;
    } else if (oldval && oldlen) {
        flags = O_RDONLY;
    } else {
        result = 0;
        goto out_putname;
    }

    mnt = current->nsproxy->pid_ns->proc_mnt;
    file = file_open_root(mnt->mnt_root, mnt, pathname, flags);
    result = PTR_ERR(file);
    if (IS_ERR(file))
        goto out_putname;

    result = table->convert(file, oldval, oldlen, newval, newlen);

    fput(file);
out_putname:
    __putname(pathname);
out:
    return result;
}


#else /* CONFIG_SYSCTL_SYSCALL */

static ssize_t binary_sysctl(const int *name, int nlen,
    void __user *oldval, size_t oldlen, void __user *newval, size_t newlen)
{
    return -ENOSYS;
}

#endif /* CONFIG_SYSCTL_SYSCALL */


static void deprecated_sysctl_warning(const int *name, int nlen)
{
    int i;

    /*
     * CTL_KERN/KERN_VERSION is used by older glibc and cannot
     * ever go away.
     */
    if (name[0] == CTL_KERN && name[1] == KERN_VERSION)
        return;

    if (printk_ratelimit()) {
        printk(KERN_INFO
            "warning: process `%s' used the deprecated sysctl "
            "system call with ", current->comm);
        for (i = 0; i < nlen; i++)
            printk("%d.", name[i]);
        printk("\n");
    }
    return;
}

#define WARN_ONCE_HASH_BITS 8
#define WARN_ONCE_HASH_SIZE (1<<WARN_ONCE_HASH_BITS)

static DECLARE_BITMAP(warn_once_bitmap, WARN_ONCE_HASH_SIZE);

#define FNV32_OFFSET 2166136261U
#define FNV32_PRIME 0x01000193

/*
 * Print each legacy sysctl (approximately) only once.
 * To avoid making the tables non-const use a external
 * hash-table instead.
 * Worst case hash collision: 6, but very rarely.
 * NOTE! We don't use the SMP-safe bit tests. We simply
 * don't care enough.
 */
static void warn_on_bintable(const int *name, int nlen)
{
    int i;
    u32 hash = FNV32_OFFSET;

    for (i = 0; i < nlen; i++)
        hash = (hash ^ name[i]) * FNV32_PRIME;
    hash %= WARN_ONCE_HASH_SIZE;
    if (__test_and_set_bit(hash, warn_once_bitmap))
        return;
    deprecated_sysctl_warning(name, nlen);
}

static ssize_t do_sysctl(int __user *args_name, int nlen,
    void __user *oldval, size_t oldlen, void __user *newval, size_t newlen)
{
    int name[CTL_MAXNAME];
    int i;

    /* Check args->nlen. */
    if (nlen < 0 || nlen > CTL_MAXNAME)
        return -ENOTDIR;
    /* Read in the sysctl name for simplicity */
    for (i = 0; i < nlen; i++)
        if (get_user(name[i], args_name + i))
            return -EFAULT;

    warn_on_bintable(name, nlen);

    return binary_sysctl(name, nlen, oldval, oldlen, newval, newlen);
}

SYSCALL_DEFINE1(sysctl, struct __sysctl_args __user *, args)
{
    struct __sysctl_args tmp;
    size_t oldlen = 0;
    ssize_t result;

    if (copy_from_user(&tmp, args, sizeof(tmp)))
        return -EFAULT;

    if (tmp.oldval && !tmp.oldlenp)
        return -EFAULT;

    if (tmp.oldlenp && get_user(oldlen, tmp.oldlenp))
        return -EFAULT;

    result = do_sysctl(tmp.name, tmp.nlen, tmp.oldval, oldlen,
               tmp.newval, tmp.newlen);

    if (result >= 0) {
        oldlen = result;
        result = 0;
    }

    if (tmp.oldlenp && put_user(oldlen, tmp.oldlenp))
        return -EFAULT;

    return result;
}


#ifdef CONFIG_COMPAT
#include <asm/compat.h>

struct compat_sysctl_args {
    compat_uptr_t   name;
    int     nlen;
    compat_uptr_t   oldval;
    compat_uptr_t   oldlenp;
    compat_uptr_t   newval;
    compat_size_t   newlen;
    compat_ulong_t  __unused[4];
};

asmlinkage long compat_sys_sysctl(struct compat_sysctl_args __user *args)
{
    struct compat_sysctl_args tmp;
    compat_size_t __user *compat_oldlenp;
    size_t oldlen = 0;
    ssize_t result;

    if (copy_from_user(&tmp, args, sizeof(tmp)))
        return -EFAULT;

    if (tmp.oldval && !tmp.oldlenp)
        return -EFAULT;

    compat_oldlenp = compat_ptr(tmp.oldlenp);
    if (compat_oldlenp && get_user(oldlen, compat_oldlenp))
        return -EFAULT;

    result = do_sysctl(compat_ptr(tmp.name), tmp.nlen,
               compat_ptr(tmp.oldval), oldlen,
               compat_ptr(tmp.newval), tmp.newlen);

    if (result >= 0) {
        oldlen = result;
        result = 0;
    }

    if (compat_oldlenp && put_user(oldlen, compat_oldlenp))
        return -EFAULT;

    return result;
}

#endif /* CONFIG_COMPAT */