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-rw-r--r--kernel/sysctl.c2337
1 files changed, 2337 insertions, 0 deletions
diff --git a/kernel/sysctl.c b/kernel/sysctl.c
new file mode 100644
index 0000000..79dbd93
--- /dev/null
+++ b/kernel/sysctl.c
@@ -0,0 +1,2337 @@
+/*
+ * sysctl.c: General linux system control interface
+ *
+ * Begun 24 March 1995, Stephen Tweedie
+ * Added /proc support, Dec 1995
+ * Added bdflush entry and intvec min/max checking, 2/23/96, Tom Dyas.
+ * Added hooks for /proc/sys/net (minor, minor patch), 96/4/1, Mike Shaver.
+ * Added kernel/java-{interpreter,appletviewer}, 96/5/10, Mike Shaver.
+ * Dynamic registration fixes, Stephen Tweedie.
+ * Added kswapd-interval, ctrl-alt-del, printk stuff, 1/8/97, Chris Horn.
+ * Made sysctl support optional via CONFIG_SYSCTL, 1/10/97, Chris
+ * Horn.
+ * Added proc_doulongvec_ms_jiffies_minmax, 09/08/99, Carlos H. Bauer.
+ * Added proc_doulongvec_minmax, 09/08/99, Carlos H. Bauer.
+ * Changed linked lists to use list.h instead of lists.h, 02/24/00, Bill
+ * Wendling.
+ * The list_for_each() macro wasn't appropriate for the sysctl loop.
+ * Removed it and replaced it with older style, 03/23/00, Bill Wendling
+ */
+
+#include <linux/config.h>
+#include <linux/module.h>
+#include <linux/mm.h>
+#include <linux/swap.h>
+#include <linux/slab.h>
+#include <linux/sysctl.h>
+#include <linux/proc_fs.h>
+#include <linux/ctype.h>
+#include <linux/utsname.h>
+#include <linux/capability.h>
+#include <linux/smp_lock.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/sysrq.h>
+#include <linux/highuid.h>
+#include <linux/writeback.h>
+#include <linux/hugetlb.h>
+#include <linux/security.h>
+#include <linux/initrd.h>
+#include <linux/times.h>
+#include <linux/limits.h>
+#include <linux/dcache.h>
+#include <linux/syscalls.h>
+
+#include <asm/uaccess.h>
+#include <asm/processor.h>
+
+#ifdef CONFIG_ROOT_NFS
+#include <linux/nfs_fs.h>
+#endif
+
+#if defined(CONFIG_SYSCTL)
+
+/* External variables not in a header file. */
+extern int C_A_D;
+extern int sysctl_overcommit_memory;
+extern int sysctl_overcommit_ratio;
+extern int max_threads;
+extern int sysrq_enabled;
+extern int core_uses_pid;
+extern char core_pattern[];
+extern int cad_pid;
+extern int pid_max;
+extern int min_free_kbytes;
+extern int printk_ratelimit_jiffies;
+extern int printk_ratelimit_burst;
+extern int pid_max_min, pid_max_max;
+
+#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86)
+int unknown_nmi_panic;
+extern int proc_unknown_nmi_panic(ctl_table *, int, struct file *,
+ void __user *, size_t *, loff_t *);
+#endif
+
+/* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */
+static int maxolduid = 65535;
+static int minolduid;
+
+static int ngroups_max = NGROUPS_MAX;
+
+#ifdef CONFIG_KMOD
+extern char modprobe_path[];
+#endif
+#ifdef CONFIG_HOTPLUG
+extern char hotplug_path[];
+#endif
+#ifdef CONFIG_CHR_DEV_SG
+extern int sg_big_buff;
+#endif
+#ifdef CONFIG_SYSVIPC
+extern size_t shm_ctlmax;
+extern size_t shm_ctlall;
+extern int shm_ctlmni;
+extern int msg_ctlmax;
+extern int msg_ctlmnb;
+extern int msg_ctlmni;
+extern int sem_ctls[];
+#endif
+
+#ifdef __sparc__
+extern char reboot_command [];
+extern int stop_a_enabled;
+extern int scons_pwroff;
+#endif
+
+#ifdef __hppa__
+extern int pwrsw_enabled;
+extern int unaligned_enabled;
+#endif
+
+#ifdef CONFIG_ARCH_S390
+#ifdef CONFIG_MATHEMU
+extern int sysctl_ieee_emulation_warnings;
+#endif
+extern int sysctl_userprocess_debug;
+#endif
+
+extern int sysctl_hz_timer;
+
+#ifdef CONFIG_BSD_PROCESS_ACCT
+extern int acct_parm[];
+#endif
+
+int randomize_va_space = 1;
+
+static int parse_table(int __user *, int, void __user *, size_t __user *, void __user *, size_t,
+ ctl_table *, void **);
+static int proc_doutsstring(ctl_table *table, int write, struct file *filp,
+ void __user *buffer, size_t *lenp, loff_t *ppos);
+
+static ctl_table root_table[];
+static struct ctl_table_header root_table_header =
+ { root_table, LIST_HEAD_INIT(root_table_header.ctl_entry) };
+
+static ctl_table kern_table[];
+static ctl_table vm_table[];
+#ifdef CONFIG_NET
+extern ctl_table net_table[];
+#endif
+static ctl_table proc_table[];
+static ctl_table fs_table[];
+static ctl_table debug_table[];
+static ctl_table dev_table[];
+extern ctl_table random_table[];
+#ifdef CONFIG_UNIX98_PTYS
+extern ctl_table pty_table[];
+#endif
+
+#ifdef HAVE_ARCH_PICK_MMAP_LAYOUT
+int sysctl_legacy_va_layout;
+#endif
+
+/* /proc declarations: */
+
+#ifdef CONFIG_PROC_FS
+
+static ssize_t proc_readsys(struct file *, char __user *, size_t, loff_t *);
+static ssize_t proc_writesys(struct file *, const char __user *, size_t, loff_t *);
+static int proc_opensys(struct inode *, struct file *);
+
+struct file_operations proc_sys_file_operations = {
+ .open = proc_opensys,
+ .read = proc_readsys,
+ .write = proc_writesys,
+};
+
+extern struct proc_dir_entry *proc_sys_root;
+
+static void register_proc_table(ctl_table *, struct proc_dir_entry *);
+static void unregister_proc_table(ctl_table *, struct proc_dir_entry *);
+#endif
+
+/* The default sysctl tables: */
+
+static ctl_table root_table[] = {
+ {
+ .ctl_name = CTL_KERN,
+ .procname = "kernel",
+ .mode = 0555,
+ .child = kern_table,
+ },
+ {
+ .ctl_name = CTL_VM,
+ .procname = "vm",
+ .mode = 0555,
+ .child = vm_table,
+ },
+#ifdef CONFIG_NET
+ {
+ .ctl_name = CTL_NET,
+ .procname = "net",
+ .mode = 0555,
+ .child = net_table,
+ },
+#endif
+ {
+ .ctl_name = CTL_PROC,
+ .procname = "proc",
+ .mode = 0555,
+ .child = proc_table,
+ },
+ {
+ .ctl_name = CTL_FS,
+ .procname = "fs",
+ .mode = 0555,
+ .child = fs_table,
+ },
+ {
+ .ctl_name = CTL_DEBUG,
+ .procname = "debug",
+ .mode = 0555,
+ .child = debug_table,
+ },
+ {
+ .ctl_name = CTL_DEV,
+ .procname = "dev",
+ .mode = 0555,
+ .child = dev_table,
+ },
+ { .ctl_name = 0 }
+};
+
+static ctl_table kern_table[] = {
+ {
+ .ctl_name = KERN_OSTYPE,
+ .procname = "ostype",
+ .data = system_utsname.sysname,
+ .maxlen = sizeof(system_utsname.sysname),
+ .mode = 0444,
+ .proc_handler = &proc_doutsstring,
+ .strategy = &sysctl_string,
+ },
+ {
+ .ctl_name = KERN_OSRELEASE,
+ .procname = "osrelease",
+ .data = system_utsname.release,
+ .maxlen = sizeof(system_utsname.release),
+ .mode = 0444,
+ .proc_handler = &proc_doutsstring,
+ .strategy = &sysctl_string,
+ },
+ {
+ .ctl_name = KERN_VERSION,
+ .procname = "version",
+ .data = system_utsname.version,
+ .maxlen = sizeof(system_utsname.version),
+ .mode = 0444,
+ .proc_handler = &proc_doutsstring,
+ .strategy = &sysctl_string,
+ },
+ {
+ .ctl_name = KERN_NODENAME,
+ .procname = "hostname",
+ .data = system_utsname.nodename,
+ .maxlen = sizeof(system_utsname.nodename),
+ .mode = 0644,
+ .proc_handler = &proc_doutsstring,
+ .strategy = &sysctl_string,
+ },
+ {
+ .ctl_name = KERN_DOMAINNAME,
+ .procname = "domainname",
+ .data = system_utsname.domainname,
+ .maxlen = sizeof(system_utsname.domainname),
+ .mode = 0644,
+ .proc_handler = &proc_doutsstring,
+ .strategy = &sysctl_string,
+ },
+ {
+ .ctl_name = KERN_PANIC,
+ .procname = "panic",
+ .data = &panic_timeout,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = KERN_CORE_USES_PID,
+ .procname = "core_uses_pid",
+ .data = &core_uses_pid,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = KERN_CORE_PATTERN,
+ .procname = "core_pattern",
+ .data = core_pattern,
+ .maxlen = 64,
+ .mode = 0644,
+ .proc_handler = &proc_dostring,
+ .strategy = &sysctl_string,
+ },
+ {
+ .ctl_name = KERN_TAINTED,
+ .procname = "tainted",
+ .data = &tainted,
+ .maxlen = sizeof(int),
+ .mode = 0444,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = KERN_CAP_BSET,
+ .procname = "cap-bound",
+ .data = &cap_bset,
+ .maxlen = sizeof(kernel_cap_t),
+ .mode = 0600,
+ .proc_handler = &proc_dointvec_bset,
+ },
+#ifdef CONFIG_BLK_DEV_INITRD
+ {
+ .ctl_name = KERN_REALROOTDEV,
+ .procname = "real-root-dev",
+ .data = &real_root_dev,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+#endif
+#ifdef __sparc__
+ {
+ .ctl_name = KERN_SPARC_REBOOT,
+ .procname = "reboot-cmd",
+ .data = reboot_command,
+ .maxlen = 256,
+ .mode = 0644,
+ .proc_handler = &proc_dostring,
+ .strategy = &sysctl_string,
+ },
+ {
+ .ctl_name = KERN_SPARC_STOP_A,
+ .procname = "stop-a",
+ .data = &stop_a_enabled,
+ .maxlen = sizeof (int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = KERN_SPARC_SCONS_PWROFF,
+ .procname = "scons-poweroff",
+ .data = &scons_pwroff,
+ .maxlen = sizeof (int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+#endif
+#ifdef __hppa__
+ {
+ .ctl_name = KERN_HPPA_PWRSW,
+ .procname = "soft-power",
+ .data = &pwrsw_enabled,
+ .maxlen = sizeof (int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = KERN_HPPA_UNALIGNED,
+ .procname = "unaligned-trap",
+ .data = &unaligned_enabled,
+ .maxlen = sizeof (int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+#endif
+ {
+ .ctl_name = KERN_CTLALTDEL,
+ .procname = "ctrl-alt-del",
+ .data = &C_A_D,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = KERN_PRINTK,
+ .procname = "printk",
+ .data = &console_loglevel,
+ .maxlen = 4*sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+#ifdef CONFIG_KMOD
+ {
+ .ctl_name = KERN_MODPROBE,
+ .procname = "modprobe",
+ .data = &modprobe_path,
+ .maxlen = KMOD_PATH_LEN,
+ .mode = 0644,
+ .proc_handler = &proc_dostring,
+ .strategy = &sysctl_string,
+ },
+#endif
+#ifdef CONFIG_HOTPLUG
+ {
+ .ctl_name = KERN_HOTPLUG,
+ .procname = "hotplug",
+ .data = &hotplug_path,
+ .maxlen = HOTPLUG_PATH_LEN,
+ .mode = 0644,
+ .proc_handler = &proc_dostring,
+ .strategy = &sysctl_string,
+ },
+#endif
+#ifdef CONFIG_CHR_DEV_SG
+ {
+ .ctl_name = KERN_SG_BIG_BUFF,
+ .procname = "sg-big-buff",
+ .data = &sg_big_buff,
+ .maxlen = sizeof (int),
+ .mode = 0444,
+ .proc_handler = &proc_dointvec,
+ },
+#endif
+#ifdef CONFIG_BSD_PROCESS_ACCT
+ {
+ .ctl_name = KERN_ACCT,
+ .procname = "acct",
+ .data = &acct_parm,
+ .maxlen = 3*sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+#endif
+#ifdef CONFIG_SYSVIPC
+ {
+ .ctl_name = KERN_SHMMAX,
+ .procname = "shmmax",
+ .data = &shm_ctlmax,
+ .maxlen = sizeof (size_t),
+ .mode = 0644,
+ .proc_handler = &proc_doulongvec_minmax,
+ },
+ {
+ .ctl_name = KERN_SHMALL,
+ .procname = "shmall",
+ .data = &shm_ctlall,
+ .maxlen = sizeof (size_t),
+ .mode = 0644,
+ .proc_handler = &proc_doulongvec_minmax,
+ },
+ {
+ .ctl_name = KERN_SHMMNI,
+ .procname = "shmmni",
+ .data = &shm_ctlmni,
+ .maxlen = sizeof (int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = KERN_MSGMAX,
+ .procname = "msgmax",
+ .data = &msg_ctlmax,
+ .maxlen = sizeof (int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = KERN_MSGMNI,
+ .procname = "msgmni",
+ .data = &msg_ctlmni,
+ .maxlen = sizeof (int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = KERN_MSGMNB,
+ .procname = "msgmnb",
+ .data = &msg_ctlmnb,
+ .maxlen = sizeof (int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = KERN_SEM,
+ .procname = "sem",
+ .data = &sem_ctls,
+ .maxlen = 4*sizeof (int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+#endif
+#ifdef CONFIG_MAGIC_SYSRQ
+ {
+ .ctl_name = KERN_SYSRQ,
+ .procname = "sysrq",
+ .data = &sysrq_enabled,
+ .maxlen = sizeof (int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+#endif
+ {
+ .ctl_name = KERN_CADPID,
+ .procname = "cad_pid",
+ .data = &cad_pid,
+ .maxlen = sizeof (int),
+ .mode = 0600,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = KERN_MAX_THREADS,
+ .procname = "threads-max",
+ .data = &max_threads,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = KERN_RANDOM,
+ .procname = "random",
+ .mode = 0555,
+ .child = random_table,
+ },
+#ifdef CONFIG_UNIX98_PTYS
+ {
+ .ctl_name = KERN_PTY,
+ .procname = "pty",
+ .mode = 0555,
+ .child = pty_table,
+ },
+#endif
+ {
+ .ctl_name = KERN_OVERFLOWUID,
+ .procname = "overflowuid",
+ .data = &overflowuid,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_minmax,
+ .strategy = &sysctl_intvec,
+ .extra1 = &minolduid,
+ .extra2 = &maxolduid,
+ },
+ {
+ .ctl_name = KERN_OVERFLOWGID,
+ .procname = "overflowgid",
+ .data = &overflowgid,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_minmax,
+ .strategy = &sysctl_intvec,
+ .extra1 = &minolduid,
+ .extra2 = &maxolduid,
+ },
+#ifdef CONFIG_ARCH_S390
+#ifdef CONFIG_MATHEMU
+ {
+ .ctl_name = KERN_IEEE_EMULATION_WARNINGS,
+ .procname = "ieee_emulation_warnings",
+ .data = &sysctl_ieee_emulation_warnings,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+#endif
+#ifdef CONFIG_NO_IDLE_HZ
+ {
+ .ctl_name = KERN_HZ_TIMER,
+ .procname = "hz_timer",
+ .data = &sysctl_hz_timer,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+#endif
+ {
+ .ctl_name = KERN_S390_USER_DEBUG_LOGGING,
+ .procname = "userprocess_debug",
+ .data = &sysctl_userprocess_debug,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+#endif
+ {
+ .ctl_name = KERN_PIDMAX,
+ .procname = "pid_max",
+ .data = &pid_max,
+ .maxlen = sizeof (int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_minmax,
+ .strategy = sysctl_intvec,
+ .extra1 = &pid_max_min,
+ .extra2 = &pid_max_max,
+ },
+ {
+ .ctl_name = KERN_PANIC_ON_OOPS,
+ .procname = "panic_on_oops",
+ .data = &panic_on_oops,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = KERN_PRINTK_RATELIMIT,
+ .procname = "printk_ratelimit",
+ .data = &printk_ratelimit_jiffies,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_jiffies,
+ .strategy = &sysctl_jiffies,
+ },
+ {
+ .ctl_name = KERN_PRINTK_RATELIMIT_BURST,
+ .procname = "printk_ratelimit_burst",
+ .data = &printk_ratelimit_burst,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = KERN_NGROUPS_MAX,
+ .procname = "ngroups_max",
+ .data = &ngroups_max,
+ .maxlen = sizeof (int),
+ .mode = 0444,
+ .proc_handler = &proc_dointvec,
+ },
+#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86)
+ {
+ .ctl_name = KERN_UNKNOWN_NMI_PANIC,
+ .procname = "unknown_nmi_panic",
+ .data = &unknown_nmi_panic,
+ .maxlen = sizeof (int),
+ .mode = 0644,
+ .proc_handler = &proc_unknown_nmi_panic,
+ },
+#endif
+#if defined(CONFIG_X86)
+ {
+ .ctl_name = KERN_BOOTLOADER_TYPE,
+ .procname = "bootloader_type",
+ .data = &bootloader_type,
+ .maxlen = sizeof (int),
+ .mode = 0444,
+ .proc_handler = &proc_dointvec,
+ },
+#endif
+ {
+ .ctl_name = KERN_RANDOMIZE,
+ .procname = "randomize_va_space",
+ .data = &randomize_va_space,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+
+ { .ctl_name = 0 }
+};
+
+/* Constants for minimum and maximum testing in vm_table.
+ We use these as one-element integer vectors. */
+static int zero;
+static int one_hundred = 100;
+
+
+static ctl_table vm_table[] = {
+ {
+ .ctl_name = VM_OVERCOMMIT_MEMORY,
+ .procname = "overcommit_memory",
+ .data = &sysctl_overcommit_memory,
+ .maxlen = sizeof(sysctl_overcommit_memory),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = VM_OVERCOMMIT_RATIO,
+ .procname = "overcommit_ratio",
+ .data = &sysctl_overcommit_ratio,
+ .maxlen = sizeof(sysctl_overcommit_ratio),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = VM_PAGE_CLUSTER,
+ .procname = "page-cluster",
+ .data = &page_cluster,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = VM_DIRTY_BACKGROUND,
+ .procname = "dirty_background_ratio",
+ .data = &dirty_background_ratio,
+ .maxlen = sizeof(dirty_background_ratio),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_minmax,
+ .strategy = &sysctl_intvec,
+ .extra1 = &zero,
+ .extra2 = &one_hundred,
+ },
+ {
+ .ctl_name = VM_DIRTY_RATIO,
+ .procname = "dirty_ratio",
+ .data = &vm_dirty_ratio,
+ .maxlen = sizeof(vm_dirty_ratio),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_minmax,
+ .strategy = &sysctl_intvec,
+ .extra1 = &zero,
+ .extra2 = &one_hundred,
+ },
+ {
+ .ctl_name = VM_DIRTY_WB_CS,
+ .procname = "dirty_writeback_centisecs",
+ .data = &dirty_writeback_centisecs,
+ .maxlen = sizeof(dirty_writeback_centisecs),
+ .mode = 0644,
+ .proc_handler = &dirty_writeback_centisecs_handler,
+ },
+ {
+ .ctl_name = VM_DIRTY_EXPIRE_CS,
+ .procname = "dirty_expire_centisecs",
+ .data = &dirty_expire_centisecs,
+ .maxlen = sizeof(dirty_expire_centisecs),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = VM_NR_PDFLUSH_THREADS,
+ .procname = "nr_pdflush_threads",
+ .data = &nr_pdflush_threads,
+ .maxlen = sizeof nr_pdflush_threads,
+ .mode = 0444 /* read-only*/,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = VM_SWAPPINESS,
+ .procname = "swappiness",
+ .data = &vm_swappiness,
+ .maxlen = sizeof(vm_swappiness),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_minmax,
+ .strategy = &sysctl_intvec,
+ .extra1 = &zero,
+ .extra2 = &one_hundred,
+ },
+#ifdef CONFIG_HUGETLB_PAGE
+ {
+ .ctl_name = VM_HUGETLB_PAGES,
+ .procname = "nr_hugepages",
+ .data = &max_huge_pages,
+ .maxlen = sizeof(unsigned long),
+ .mode = 0644,
+ .proc_handler = &hugetlb_sysctl_handler,
+ .extra1 = (void *)&hugetlb_zero,
+ .extra2 = (void *)&hugetlb_infinity,
+ },
+ {
+ .ctl_name = VM_HUGETLB_GROUP,
+ .procname = "hugetlb_shm_group",
+ .data = &sysctl_hugetlb_shm_group,
+ .maxlen = sizeof(gid_t),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+#endif
+ {
+ .ctl_name = VM_LOWMEM_RESERVE_RATIO,
+ .procname = "lowmem_reserve_ratio",
+ .data = &sysctl_lowmem_reserve_ratio,
+ .maxlen = sizeof(sysctl_lowmem_reserve_ratio),
+ .mode = 0644,
+ .proc_handler = &lowmem_reserve_ratio_sysctl_handler,
+ .strategy = &sysctl_intvec,
+ },
+ {
+ .ctl_name = VM_MIN_FREE_KBYTES,
+ .procname = "min_free_kbytes",
+ .data = &min_free_kbytes,
+ .maxlen = sizeof(min_free_kbytes),
+ .mode = 0644,
+ .proc_handler = &min_free_kbytes_sysctl_handler,
+ .strategy = &sysctl_intvec,
+ .extra1 = &zero,
+ },
+#ifdef CONFIG_MMU
+ {
+ .ctl_name = VM_MAX_MAP_COUNT,
+ .procname = "max_map_count",
+ .data = &sysctl_max_map_count,
+ .maxlen = sizeof(sysctl_max_map_count),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec
+ },
+#endif
+ {
+ .ctl_name = VM_LAPTOP_MODE,
+ .procname = "laptop_mode",
+ .data = &laptop_mode,
+ .maxlen = sizeof(laptop_mode),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ .strategy = &sysctl_intvec,
+ .extra1 = &zero,
+ },
+ {
+ .ctl_name = VM_BLOCK_DUMP,
+ .procname = "block_dump",
+ .data = &block_dump,
+ .maxlen = sizeof(block_dump),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ .strategy = &sysctl_intvec,
+ .extra1 = &zero,
+ },
+ {
+ .ctl_name = VM_VFS_CACHE_PRESSURE,
+ .procname = "vfs_cache_pressure",
+ .data = &sysctl_vfs_cache_pressure,
+ .maxlen = sizeof(sysctl_vfs_cache_pressure),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ .strategy = &sysctl_intvec,
+ .extra1 = &zero,
+ },
+#ifdef HAVE_ARCH_PICK_MMAP_LAYOUT
+ {
+ .ctl_name = VM_LEGACY_VA_LAYOUT,
+ .procname = "legacy_va_layout",
+ .data = &sysctl_legacy_va_layout,
+ .maxlen = sizeof(sysctl_legacy_va_layout),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ .strategy = &sysctl_intvec,
+ .extra1 = &zero,
+ },
+#endif
+#ifdef CONFIG_SWAP
+ {
+ .ctl_name = VM_SWAP_TOKEN_TIMEOUT,
+ .procname = "swap_token_timeout",
+ .data = &swap_token_default_timeout,
+ .maxlen = sizeof(swap_token_default_timeout),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_jiffies,
+ .strategy = &sysctl_jiffies,
+ },
+#endif
+ { .ctl_name = 0 }
+};
+
+static ctl_table proc_table[] = {
+ { .ctl_name = 0 }
+};
+
+static ctl_table fs_table[] = {
+ {
+ .ctl_name = FS_NRINODE,
+ .procname = "inode-nr",
+ .data = &inodes_stat,
+ .maxlen = 2*sizeof(int),
+ .mode = 0444,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = FS_STATINODE,
+ .procname = "inode-state",
+ .data = &inodes_stat,
+ .maxlen = 7*sizeof(int),
+ .mode = 0444,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = FS_NRFILE,
+ .procname = "file-nr",
+ .data = &files_stat,
+ .maxlen = 3*sizeof(int),
+ .mode = 0444,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = FS_MAXFILE,
+ .procname = "file-max",
+ .data = &files_stat.max_files,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = FS_DENTRY,
+ .procname = "dentry-state",
+ .data = &dentry_stat,
+ .maxlen = 6*sizeof(int),
+ .mode = 0444,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = FS_OVERFLOWUID,
+ .procname = "overflowuid",
+ .data = &fs_overflowuid,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_minmax,
+ .strategy = &sysctl_intvec,
+ .extra1 = &minolduid,
+ .extra2 = &maxolduid,
+ },
+ {
+ .ctl_name = FS_OVERFLOWGID,
+ .procname = "overflowgid",
+ .data = &fs_overflowgid,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec_minmax,
+ .strategy = &sysctl_intvec,
+ .extra1 = &minolduid,
+ .extra2 = &maxolduid,
+ },
+ {
+ .ctl_name = FS_LEASES,
+ .procname = "leases-enable",
+ .data = &leases_enable,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+#ifdef CONFIG_DNOTIFY
+ {
+ .ctl_name = FS_DIR_NOTIFY,
+ .procname = "dir-notify-enable",
+ .data = &dir_notify_enable,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+#endif
+#ifdef CONFIG_MMU
+ {
+ .ctl_name = FS_LEASE_TIME,
+ .procname = "lease-break-time",
+ .data = &lease_break_time,
+ .maxlen = sizeof(int),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = FS_AIO_NR,
+ .procname = "aio-nr",
+ .data = &aio_nr,
+ .maxlen = sizeof(aio_nr),
+ .mode = 0444,
+ .proc_handler = &proc_dointvec,
+ },
+ {
+ .ctl_name = FS_AIO_MAX_NR,
+ .procname = "aio-max-nr",
+ .data = &aio_max_nr,
+ .maxlen = sizeof(aio_max_nr),
+ .mode = 0644,
+ .proc_handler = &proc_dointvec,
+ },
+#endif
+ { .ctl_name = 0 }
+};
+
+static ctl_table debug_table[] = {
+ { .ctl_name = 0 }
+};
+
+static ctl_table dev_table[] = {
+ { .ctl_name = 0 }
+};
+
+extern void init_irq_proc (void);
+
+void __init sysctl_init(void)
+{
+#ifdef CONFIG_PROC_FS
+ register_proc_table(root_table, proc_sys_root);
+ init_irq_proc();
+#endif
+}
+
+int do_sysctl(int __user *name, int nlen, void __user *oldval, size_t __user *oldlenp,
+ void __user *newval, size_t newlen)
+{
+ struct list_head *tmp;
+
+ if (nlen <= 0 || nlen >= CTL_MAXNAME)
+ return -ENOTDIR;
+ if (oldval) {
+ int old_len;
+ if (!oldlenp || get_user(old_len, oldlenp))
+ return -EFAULT;
+ }
+ tmp = &root_table_header.ctl_entry;
+ do {
+ struct ctl_table_header *head =
+ list_entry(tmp, struct ctl_table_header, ctl_entry);
+ void *context = NULL;
+ int error = parse_table(name, nlen, oldval, oldlenp,
+ newval, newlen, head->ctl_table,
+ &context);
+ if (context)
+ kfree(context);
+ if (error != -ENOTDIR)
+ return error;
+ tmp = tmp->next;
+ } while (tmp != &root_table_header.ctl_entry);
+ return -ENOTDIR;
+}
+
+asmlinkage long sys_sysctl(struct __sysctl_args __user *args)
+{
+ struct __sysctl_args tmp;
+ int error;
+
+ if (copy_from_user(&tmp, args, sizeof(tmp)))
+ return -EFAULT;
+
+ lock_kernel();
+ error = do_sysctl(tmp.name, tmp.nlen, tmp.oldval, tmp.oldlenp,
+ tmp.newval, tmp.newlen);
+ unlock_kernel();
+ return error;
+}
+
+/*
+ * ctl_perm does NOT grant the superuser all rights automatically, because
+ * some sysctl variables are readonly even to root.
+ */
+
+static int test_perm(int mode, int op)
+{
+ if (!current->euid)
+ mode >>= 6;
+ else if (in_egroup_p(0))
+ mode >>= 3;
+ if ((mode & op & 0007) == op)
+ return 0;
+ return -EACCES;
+}
+
+static inline int ctl_perm(ctl_table *table, int op)
+{
+ int error;
+ error = security_sysctl(table, op);
+ if (error)
+ return error;
+ return test_perm(table->mode, op);
+}
+
+static int parse_table(int __user *name, int nlen,
+ void __user *oldval, size_t __user *oldlenp,
+ void __user *newval, size_t newlen,
+ ctl_table *table, void **context)
+{
+ int n;
+repeat:
+ if (!nlen)
+ return -ENOTDIR;
+ if (get_user(n, name))
+ return -EFAULT;
+ for ( ; table->ctl_name; table++) {
+ if (n == table->ctl_name || table->ctl_name == CTL_ANY) {
+ int error;
+ if (table->child) {
+ if (ctl_perm(table, 001))
+ return -EPERM;
+ if (table->strategy) {
+ error = table->strategy(
+ table, name, nlen,
+ oldval, oldlenp,
+ newval, newlen, context);
+ if (error)
+ return error;
+ }
+ name++;
+ nlen--;
+ table = table->child;
+ goto repeat;
+ }
+ error = do_sysctl_strategy(table, name, nlen,
+ oldval, oldlenp,
+ newval, newlen, context);
+ return error;
+ }
+ }
+ return -ENOTDIR;
+}
+
+/* Perform the actual read/write of a sysctl table entry. */
+int do_sysctl_strategy (ctl_table *table,
+ int __user *name, int nlen,
+ void __user *oldval, size_t __user *oldlenp,
+ void __user *newval, size_t newlen, void **context)
+{
+ int op = 0, rc;
+ size_t len;
+
+ if (oldval)
+ op |= 004;
+ if (newval)
+ op |= 002;
+ if (ctl_perm(table, op))
+ return -EPERM;
+
+ if (table->strategy) {
+ rc = table->strategy(table, name, nlen, oldval, oldlenp,
+ newval, newlen, context);
+ if (rc < 0)
+ return rc;
+ if (rc > 0)
+ return 0;
+ }
+
+ /* If there is no strategy routine, or if the strategy returns
+ * zero, proceed with automatic r/w */
+ if (table->data && table->maxlen) {
+ if (oldval && oldlenp) {
+ if (get_user(len, oldlenp))
+ return -EFAULT;
+ if (len) {
+ if (len > table->maxlen)
+ len = table->maxlen;
+ if(copy_to_user(oldval, table->data, len))
+ return -EFAULT;
+ if(put_user(len, oldlenp))
+ return -EFAULT;
+ }
+ }
+ if (newval && newlen) {
+ len = newlen;
+ if (len > table->maxlen)
+ len = table->maxlen;
+ if(copy_from_user(table->data, newval, len))
+ return -EFAULT;
+ }
+ }
+ return 0;
+}
+
+/**
+ * register_sysctl_table - register a sysctl hierarchy
+ * @table: the top-level table structure
+ * @insert_at_head: whether the entry should be inserted in front or at the end
+ *
+ * Register a sysctl table hierarchy. @table should be a filled in ctl_table
+ * array. An entry with a ctl_name of 0 terminates the table.
+ *
+ * The members of the &ctl_table structure are used as follows:
+ *
+ * ctl_name - This is the numeric sysctl value used by sysctl(2). The number
+ * must be unique within that level of sysctl
+ *
+ * procname - the name of the sysctl file under /proc/sys. Set to %NULL to not
+ * enter a sysctl file
+ *
+ * data - a pointer to data for use by proc_handler
+ *
+ * maxlen - the maximum size in bytes of the data
+ *
+ * mode - the file permissions for the /proc/sys file, and for sysctl(2)
+ *
+ * child - a pointer to the child sysctl table if this entry is a directory, or
+ * %NULL.
+ *
+ * proc_handler - the text handler routine (described below)
+ *
+ * strategy - the strategy routine (described below)
+ *
+ * de - for internal use by the sysctl routines
+ *
+ * extra1, extra2 - extra pointers usable by the proc handler routines
+ *
+ * Leaf nodes in the sysctl tree will be represented by a single file
+ * under /proc; non-leaf nodes will be represented by directories.
+ *
+ * sysctl(2) can automatically manage read and write requests through
+ * the sysctl table. The data and maxlen fields of the ctl_table
+ * struct enable minimal validation of the values being written to be
+ * performed, and the mode field allows minimal authentication.
+ *
+ * More sophisticated management can be enabled by the provision of a
+ * strategy routine with the table entry. This will be called before
+ * any automatic read or write of the data is performed.
+ *
+ * The strategy routine may return
+ *
+ * < 0 - Error occurred (error is passed to user process)
+ *
+ * 0 - OK - proceed with automatic read or write.
+ *
+ * > 0 - OK - read or write has been done by the strategy routine, so
+ * return immediately.
+ *
+ * There must be a proc_handler routine for any terminal nodes
+ * mirrored under /proc/sys (non-terminals are handled by a built-in
+ * directory handler). Several default handlers are available to
+ * cover common cases -
+ *
+ * proc_dostring(), proc_dointvec(), proc_dointvec_jiffies(),
+ * proc_dointvec_userhz_jiffies(), proc_dointvec_minmax(),
+ * proc_doulongvec_ms_jiffies_minmax(), proc_doulongvec_minmax()
+ *
+ * It is the handler's job to read the input buffer from user memory
+ * and process it. The handler should return 0 on success.
+ *
+ * This routine returns %NULL on a failure to register, and a pointer
+ * to the table header on success.
+ */
+struct ctl_table_header *register_sysctl_table(ctl_table * table,
+ int insert_at_head)
+{
+ struct ctl_table_header *tmp;
+ tmp = kmalloc(sizeof(struct ctl_table_header), GFP_KERNEL);
+ if (!tmp)
+ return NULL;
+ tmp->ctl_table = table;
+ INIT_LIST_HEAD(&tmp->ctl_entry);
+ if (insert_at_head)
+ list_add(&tmp->ctl_entry, &root_table_header.ctl_entry);
+ else
+ list_add_tail(&tmp->ctl_entry, &root_table_header.ctl_entry);
+#ifdef CONFIG_PROC_FS
+ register_proc_table(table, proc_sys_root);
+#endif
+ return tmp;
+}
+
+/**
+ * unregister_sysctl_table - unregister a sysctl table hierarchy
+ * @header: the header returned from register_sysctl_table
+ *
+ * Unregisters the sysctl table and all children. proc entries may not
+ * actually be removed until they are no longer used by anyone.
+ */
+void unregister_sysctl_table(struct ctl_table_header * header)
+{
+ list_del(&header->ctl_entry);
+#ifdef CONFIG_PROC_FS
+ unregister_proc_table(header->ctl_table, proc_sys_root);
+#endif
+ kfree(header);
+}
+
+/*
+ * /proc/sys support
+ */
+
+#ifdef CONFIG_PROC_FS
+
+/* Scan the sysctl entries in table and add them all into /proc */
+static void register_proc_table(ctl_table * table, struct proc_dir_entry *root)
+{
+ struct proc_dir_entry *de;
+ int len;
+ mode_t mode;
+
+ for (; table->ctl_name; table++) {
+ /* Can't do anything without a proc name. */
+ if (!table->procname)
+ continue;
+ /* Maybe we can't do anything with it... */
+ if (!table->proc_handler && !table->child) {
+ printk(KERN_WARNING "SYSCTL: Can't register %s\n",
+ table->procname);
+ continue;
+ }
+
+ len = strlen(table->procname);
+ mode = table->mode;
+
+ de = NULL;
+ if (table->proc_handler)
+ mode |= S_IFREG;
+ else {
+ mode |= S_IFDIR;
+ for (de = root->subdir; de; de = de->next) {
+ if (proc_match(len, table->procname, de))
+ break;
+ }
+ /* If the subdir exists already, de is non-NULL */
+ }
+
+ if (!de) {
+ de = create_proc_entry(table->procname, mode, root);
+ if (!de)
+ continue;
+ de->data = (void *) table;
+ if (table->proc_handler)
+ de->proc_fops = &proc_sys_file_operations;
+ }
+ table->de = de;
+ if (de->mode & S_IFDIR)
+ register_proc_table(table->child, de);
+ }
+}
+
+/*
+ * Unregister a /proc sysctl table and any subdirectories.
+ */
+static void unregister_proc_table(ctl_table * table, struct proc_dir_entry *root)
+{
+ struct proc_dir_entry *de;
+ for (; table->ctl_name; table++) {
+ if (!(de = table->de))
+ continue;
+ if (de->mode & S_IFDIR) {
+ if (!table->child) {
+ printk (KERN_ALERT "Help - malformed sysctl tree on free\n");
+ continue;
+ }
+ unregister_proc_table(table->child, de);
+
+ /* Don't unregister directories which still have entries.. */
+ if (de->subdir)
+ continue;
+ }
+
+ /* Don't unregister proc entries that are still being used.. */
+ if (atomic_read(&de->count))
+ continue;
+
+ table->de = NULL;
+ remove_proc_entry(table->procname, root);
+ }
+}
+
+static ssize_t do_rw_proc(int write, struct file * file, char __user * buf,
+ size_t count, loff_t *ppos)
+{
+ int op;
+ struct proc_dir_entry *de;
+ struct ctl_table *table;
+ size_t res;
+ ssize_t error;
+
+ de = PDE(file->f_dentry->d_inode);
+ if (!de || !de->data)
+ return -ENOTDIR;
+ table = (struct ctl_table *) de->data;
+ if (!table || !table->proc_handler)
+ return -ENOTDIR;
+ op = (write ? 002 : 004);
+ if (ctl_perm(table, op))
+ return -EPERM;
+
+ res = count;
+
+ error = (*table->proc_handler) (table, write, file, buf, &res, ppos);
+ if (error)
+ return error;
+ return res;
+}
+
+static int proc_opensys(struct inode *inode, struct file *file)
+{
+ if (file->f_mode & FMODE_WRITE) {
+ /*
+ * sysctl entries that are not writable,
+ * are _NOT_ writable, capabilities or not.
+ */
+ if (!(inode->i_mode & S_IWUSR))
+ return -EPERM;
+ }
+
+ return 0;
+}
+
+static ssize_t proc_readsys(struct file * file, char __user * buf,
+ size_t count, loff_t *ppos)
+{
+ return do_rw_proc(0, file, buf, count, ppos);
+}
+
+static ssize_t proc_writesys(struct file * file, const char __user * buf,
+ size_t count, loff_t *ppos)
+{
+ return do_rw_proc(1, file, (char __user *) buf, count, ppos);
+}
+
+/**
+ * proc_dostring - read a string sysctl
+ * @table: the sysctl table
+ * @write: %TRUE if this is a write to the sysctl file
+ * @filp: the file structure
+ * @buffer: the user buffer
+ * @lenp: the size of the user buffer
+ * @ppos: file position
+ *
+ * Reads/writes a string from/to the user buffer. If the kernel
+ * buffer provided is not large enough to hold the string, the
+ * string is truncated. The copied string is %NULL-terminated.
+ * If the string is being read by the user process, it is copied
+ * and a newline '\n' is added. It is truncated if the buffer is
+ * not large enough.
+ *
+ * Returns 0 on success.
+ */
+int proc_dostring(ctl_table *table, int write, struct file *filp,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ size_t len;
+ char __user *p;
+ char c;
+
+ if (!table->data || !table->maxlen || !*lenp ||
+ (*ppos && !write)) {
+ *lenp = 0;
+ return 0;
+ }
+
+ if (write) {
+ len = 0;
+ p = buffer;
+ while (len < *lenp) {
+ if (get_user(c, p++))
+ return -EFAULT;
+ if (c == 0 || c == '\n')
+ break;
+ len++;
+ }
+ if (len >= table->maxlen)
+ len = table->maxlen-1;
+ if(copy_from_user(table->data, buffer, len))
+ return -EFAULT;
+ ((char *) table->data)[len] = 0;
+ *ppos += *lenp;
+ } else {
+ len = strlen(table->data);
+ if (len > table->maxlen)
+ len = table->maxlen;
+ if (len > *lenp)
+ len = *lenp;
+ if (len)
+ if(copy_to_user(buffer, table->data, len))
+ return -EFAULT;
+ if (len < *lenp) {
+ if(put_user('\n', ((char __user *) buffer) + len))
+ return -EFAULT;
+ len++;
+ }
+ *lenp = len;
+ *ppos += len;
+ }
+ return 0;
+}
+
+/*
+ * Special case of dostring for the UTS structure. This has locks
+ * to observe. Should this be in kernel/sys.c ????
+ */
+
+static int proc_doutsstring(ctl_table *table, int write, struct file *filp,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ int r;
+
+ if (!write) {
+ down_read(&uts_sem);
+ r=proc_dostring(table,0,filp,buffer,lenp, ppos);
+ up_read(&uts_sem);
+ } else {
+ down_write(&uts_sem);
+ r=proc_dostring(table,1,filp,buffer,lenp, ppos);
+ up_write(&uts_sem);
+ }
+ return r;
+}
+
+static int do_proc_dointvec_conv(int *negp, unsigned long *lvalp,
+ int *valp,
+ int write, void *data)
+{
+ if (write) {
+ *valp = *negp ? -*lvalp : *lvalp;
+ } else {
+ int val = *valp;
+ if (val < 0) {
+ *negp = -1;
+ *lvalp = (unsigned long)-val;
+ } else {
+ *negp = 0;
+ *lvalp = (unsigned long)val;
+ }
+ }
+ return 0;
+}
+
+static int do_proc_dointvec(ctl_table *table, int write, struct file *filp,
+ void __user *buffer, size_t *lenp, loff_t *ppos,
+ int (*conv)(int *negp, unsigned long *lvalp, int *valp,
+ int write, void *data),
+ void *data)
+{
+#define TMPBUFLEN 21
+ int *i, vleft, first=1, neg, val;
+ unsigned long lval;
+ size_t left, len;
+
+ char buf[TMPBUFLEN], *p;
+ char __user *s = buffer;
+
+ if (!table->data || !table->maxlen || !*lenp ||
+ (*ppos && !write)) {
+ *lenp = 0;
+ return 0;
+ }
+
+ i = (int *) table->data;
+ vleft = table->maxlen / sizeof(*i);
+ left = *lenp;
+
+ if (!conv)
+ conv = do_proc_dointvec_conv;
+
+ for (; left && vleft--; i++, first=0) {
+ if (write) {
+ while (left) {
+ char c;
+ if (get_user(c, s))
+ return -EFAULT;
+ if (!isspace(c))
+ break;
+ left--;
+ s++;
+ }
+ if (!left)
+ break;
+ neg = 0;
+ len = left;
+ if (len > sizeof(buf) - 1)
+ len = sizeof(buf) - 1;
+ if (copy_from_user(buf, s, len))
+ return -EFAULT;
+ buf[len] = 0;
+ p = buf;
+ if (*p == '-' && left > 1) {
+ neg = 1;
+ left--, p++;
+ }
+ if (*p < '0' || *p > '9')
+ break;
+
+ lval = simple_strtoul(p, &p, 0);
+
+ len = p-buf;
+ if ((len < left) && *p && !isspace(*p))
+ break;
+ if (neg)
+ val = -val;
+ s += len;
+ left -= len;
+
+ if (conv(&neg, &lval, i, 1, data))
+ break;
+ } else {
+ p = buf;
+ if (!first)
+ *p++ = '\t';
+
+ if (conv(&neg, &lval, i, 0, data))
+ break;
+
+ sprintf(p, "%s%lu", neg ? "-" : "", lval);
+ len = strlen(buf);
+ if (len > left)
+ len = left;
+ if(copy_to_user(s, buf, len))
+ return -EFAULT;
+ left -= len;
+ s += len;
+ }
+ }
+
+ if (!write && !first && left) {
+ if(put_user('\n', s))
+ return -EFAULT;
+ left--, s++;
+ }
+ if (write) {
+ while (left) {
+ char c;
+ if (get_user(c, s++))
+ return -EFAULT;
+ if (!isspace(c))
+ break;
+ left--;
+ }
+ }
+ if (write && first)
+ return -EINVAL;
+ *lenp -= left;
+ *ppos += *lenp;
+ return 0;
+#undef TMPBUFLEN
+}
+
+/**
+ * proc_dointvec - read a vector of integers
+ * @table: the sysctl table
+ * @write: %TRUE if this is a write to the sysctl file
+ * @filp: the file structure
+ * @buffer: the user buffer
+ * @lenp: the size of the user buffer
+ * @ppos: file position
+ *
+ * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
+ * values from/to the user buffer, treated as an ASCII string.
+ *
+ * Returns 0 on success.
+ */
+int proc_dointvec(ctl_table *table, int write, struct file *filp,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ return do_proc_dointvec(table,write,filp,buffer,lenp,ppos,
+ NULL,NULL);
+}
+
+#define OP_SET 0
+#define OP_AND 1
+#define OP_OR 2
+#define OP_MAX 3
+#define OP_MIN 4
+
+static int do_proc_dointvec_bset_conv(int *negp, unsigned long *lvalp,
+ int *valp,
+ int write, void *data)
+{
+ int op = *(int *)data;
+ if (write) {
+ int val = *negp ? -*lvalp : *lvalp;
+ switch(op) {
+ case OP_SET: *valp = val; break;
+ case OP_AND: *valp &= val; break;
+ case OP_OR: *valp |= val; break;
+ case OP_MAX: if(*valp < val)
+ *valp = val;
+ break;
+ case OP_MIN: if(*valp > val)
+ *valp = val;
+ break;
+ }
+ } else {
+ int val = *valp;
+ if (val < 0) {
+ *negp = -1;
+ *lvalp = (unsigned long)-val;
+ } else {
+ *negp = 0;
+ *lvalp = (unsigned long)val;
+ }
+ }
+ return 0;
+}
+
+/*
+ * init may raise the set.
+ */
+
+int proc_dointvec_bset(ctl_table *table, int write, struct file *filp,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ int op;
+
+ if (!capable(CAP_SYS_MODULE)) {
+ return -EPERM;
+ }
+
+ op = (current->pid == 1) ? OP_SET : OP_AND;
+ return do_proc_dointvec(table,write,filp,buffer,lenp,ppos,
+ do_proc_dointvec_bset_conv,&op);
+}
+
+struct do_proc_dointvec_minmax_conv_param {
+ int *min;
+ int *max;
+};
+
+static int do_proc_dointvec_minmax_conv(int *negp, unsigned long *lvalp,
+ int *valp,
+ int write, void *data)
+{
+ struct do_proc_dointvec_minmax_conv_param *param = data;
+ if (write) {
+ int val = *negp ? -*lvalp : *lvalp;
+ if ((param->min && *param->min > val) ||
+ (param->max && *param->max < val))
+ return -EINVAL;
+ *valp = val;
+ } else {
+ int val = *valp;
+ if (val < 0) {
+ *negp = -1;
+ *lvalp = (unsigned long)-val;
+ } else {
+ *negp = 0;
+ *lvalp = (unsigned long)val;
+ }
+ }
+ return 0;
+}
+
+/**
+ * proc_dointvec_minmax - read a vector of integers with min/max values
+ * @table: the sysctl table
+ * @write: %TRUE if this is a write to the sysctl file
+ * @filp: the file structure
+ * @buffer: the user buffer
+ * @lenp: the size of the user buffer
+ * @ppos: file position
+ *
+ * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
+ * values from/to the user buffer, treated as an ASCII string.
+ *
+ * This routine will ensure the values are within the range specified by
+ * table->extra1 (min) and table->extra2 (max).
+ *
+ * Returns 0 on success.
+ */
+int proc_dointvec_minmax(ctl_table *table, int write, struct file *filp,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ struct do_proc_dointvec_minmax_conv_param param = {
+ .min = (int *) table->extra1,
+ .max = (int *) table->extra2,
+ };
+ return do_proc_dointvec(table, write, filp, buffer, lenp, ppos,
+ do_proc_dointvec_minmax_conv, &param);
+}
+
+static int do_proc_doulongvec_minmax(ctl_table *table, int write,
+ struct file *filp,
+ void __user *buffer,
+ size_t *lenp, loff_t *ppos,
+ unsigned long convmul,
+ unsigned long convdiv)
+{
+#define TMPBUFLEN 21
+ unsigned long *i, *min, *max, val;
+ int vleft, first=1, neg;
+ size_t len, left;
+ char buf[TMPBUFLEN], *p;
+ char __user *s = buffer;
+
+ if (!table->data || !table->maxlen || !*lenp ||
+ (*ppos && !write)) {
+ *lenp = 0;
+ return 0;
+ }
+
+ i = (unsigned long *) table->data;
+ min = (unsigned long *) table->extra1;
+ max = (unsigned long *) table->extra2;
+ vleft = table->maxlen / sizeof(unsigned long);
+ left = *lenp;
+
+ for (; left && vleft--; i++, min++, max++, first=0) {
+ if (write) {
+ while (left) {
+ char c;
+ if (get_user(c, s))
+ return -EFAULT;
+ if (!isspace(c))
+ break;
+ left--;
+ s++;
+ }
+ if (!left)
+ break;
+ neg = 0;
+ len = left;
+ if (len > TMPBUFLEN-1)
+ len = TMPBUFLEN-1;
+ if (copy_from_user(buf, s, len))
+ return -EFAULT;
+ buf[len] = 0;
+ p = buf;
+ if (*p == '-' && left > 1) {
+ neg = 1;
+ left--, p++;
+ }
+ if (*p < '0' || *p > '9')
+ break;
+ val = simple_strtoul(p, &p, 0) * convmul / convdiv ;
+ len = p-buf;
+ if ((len < left) && *p && !isspace(*p))
+ break;
+ if (neg)
+ val = -val;
+ s += len;
+ left -= len;
+
+ if(neg)
+ continue;
+ if ((min && val < *min) || (max && val > *max))
+ continue;
+ *i = val;
+ } else {
+ p = buf;
+ if (!first)
+ *p++ = '\t';
+ sprintf(p, "%lu", convdiv * (*i) / convmul);
+ len = strlen(buf);
+ if (len > left)
+ len = left;
+ if(copy_to_user(s, buf, len))
+ return -EFAULT;
+ left -= len;
+ s += len;
+ }
+ }
+
+ if (!write && !first && left) {
+ if(put_user('\n', s))
+ return -EFAULT;
+ left--, s++;
+ }
+ if (write) {
+ while (left) {
+ char c;
+ if (get_user(c, s++))
+ return -EFAULT;
+ if (!isspace(c))
+ break;
+ left--;
+ }
+ }
+ if (write && first)
+ return -EINVAL;
+ *lenp -= left;
+ *ppos += *lenp;
+ return 0;
+#undef TMPBUFLEN
+}
+
+/**
+ * proc_doulongvec_minmax - read a vector of long integers with min/max values
+ * @table: the sysctl table
+ * @write: %TRUE if this is a write to the sysctl file
+ * @filp: the file structure
+ * @buffer: the user buffer
+ * @lenp: the size of the user buffer
+ * @ppos: file position
+ *
+ * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long
+ * values from/to the user buffer, treated as an ASCII string.
+ *
+ * This routine will ensure the values are within the range specified by
+ * table->extra1 (min) and table->extra2 (max).
+ *
+ * Returns 0 on success.
+ */
+int proc_doulongvec_minmax(ctl_table *table, int write, struct file *filp,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ return do_proc_doulongvec_minmax(table, write, filp, buffer, lenp, ppos, 1l, 1l);
+}
+
+/**
+ * proc_doulongvec_ms_jiffies_minmax - read a vector of millisecond values with min/max values
+ * @table: the sysctl table
+ * @write: %TRUE if this is a write to the sysctl file
+ * @filp: the file structure
+ * @buffer: the user buffer
+ * @lenp: the size of the user buffer
+ * @ppos: file position
+ *
+ * Reads/writes up to table->maxlen/sizeof(unsigned long) unsigned long
+ * values from/to the user buffer, treated as an ASCII string. The values
+ * are treated as milliseconds, and converted to jiffies when they are stored.
+ *
+ * This routine will ensure the values are within the range specified by
+ * table->extra1 (min) and table->extra2 (max).
+ *
+ * Returns 0 on success.
+ */
+int proc_doulongvec_ms_jiffies_minmax(ctl_table *table, int write,
+ struct file *filp,
+ void __user *buffer,
+ size_t *lenp, loff_t *ppos)
+{
+ return do_proc_doulongvec_minmax(table, write, filp, buffer,
+ lenp, ppos, HZ, 1000l);
+}
+
+
+static int do_proc_dointvec_jiffies_conv(int *negp, unsigned long *lvalp,
+ int *valp,
+ int write, void *data)
+{
+ if (write) {
+ *valp = *negp ? -(*lvalp*HZ) : (*lvalp*HZ);
+ } else {
+ int val = *valp;
+ unsigned long lval;
+ if (val < 0) {
+ *negp = -1;
+ lval = (unsigned long)-val;
+ } else {
+ *negp = 0;
+ lval = (unsigned long)val;
+ }
+ *lvalp = lval / HZ;
+ }
+ return 0;
+}
+
+static int do_proc_dointvec_userhz_jiffies_conv(int *negp, unsigned long *lvalp,
+ int *valp,
+ int write, void *data)
+{
+ if (write) {
+ *valp = clock_t_to_jiffies(*negp ? -*lvalp : *lvalp);
+ } else {
+ int val = *valp;
+ unsigned long lval;
+ if (val < 0) {
+ *negp = -1;
+ lval = (unsigned long)-val;
+ } else {
+ *negp = 0;
+ lval = (unsigned long)val;
+ }
+ *lvalp = jiffies_to_clock_t(lval);
+ }
+ return 0;
+}
+
+static int do_proc_dointvec_ms_jiffies_conv(int *negp, unsigned long *lvalp,
+ int *valp,
+ int write, void *data)
+{
+ if (write) {
+ *valp = msecs_to_jiffies(*negp ? -*lvalp : *lvalp);
+ } else {
+ int val = *valp;
+ unsigned long lval;
+ if (val < 0) {
+ *negp = -1;
+ lval = (unsigned long)-val;
+ } else {
+ *negp = 0;
+ lval = (unsigned long)val;
+ }
+ *lvalp = jiffies_to_msecs(lval);
+ }
+ return 0;
+}
+
+/**
+ * proc_dointvec_jiffies - read a vector of integers as seconds
+ * @table: the sysctl table
+ * @write: %TRUE if this is a write to the sysctl file
+ * @filp: the file structure
+ * @buffer: the user buffer
+ * @lenp: the size of the user buffer
+ * @ppos: file position
+ *
+ * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
+ * values from/to the user buffer, treated as an ASCII string.
+ * The values read are assumed to be in seconds, and are converted into
+ * jiffies.
+ *
+ * Returns 0 on success.
+ */
+int proc_dointvec_jiffies(ctl_table *table, int write, struct file *filp,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ return do_proc_dointvec(table,write,filp,buffer,lenp,ppos,
+ do_proc_dointvec_jiffies_conv,NULL);
+}
+
+/**
+ * proc_dointvec_userhz_jiffies - read a vector of integers as 1/USER_HZ seconds
+ * @table: the sysctl table
+ * @write: %TRUE if this is a write to the sysctl file
+ * @filp: the file structure
+ * @buffer: the user buffer
+ * @lenp: the size of the user buffer
+ *
+ * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
+ * values from/to the user buffer, treated as an ASCII string.
+ * The values read are assumed to be in 1/USER_HZ seconds, and
+ * are converted into jiffies.
+ *
+ * Returns 0 on success.
+ */
+int proc_dointvec_userhz_jiffies(ctl_table *table, int write, struct file *filp,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ return do_proc_dointvec(table,write,filp,buffer,lenp,ppos,
+ do_proc_dointvec_userhz_jiffies_conv,NULL);
+}
+
+/**
+ * proc_dointvec_ms_jiffies - read a vector of integers as 1 milliseconds
+ * @table: the sysctl table
+ * @write: %TRUE if this is a write to the sysctl file
+ * @filp: the file structure
+ * @buffer: the user buffer
+ * @lenp: the size of the user buffer
+ *
+ * Reads/writes up to table->maxlen/sizeof(unsigned int) integer
+ * values from/to the user buffer, treated as an ASCII string.
+ * The values read are assumed to be in 1/1000 seconds, and
+ * are converted into jiffies.
+ *
+ * Returns 0 on success.
+ */
+int proc_dointvec_ms_jiffies(ctl_table *table, int write, struct file *filp,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ return do_proc_dointvec(table, write, filp, buffer, lenp, ppos,
+ do_proc_dointvec_ms_jiffies_conv, NULL);
+}
+
+#else /* CONFIG_PROC_FS */
+
+int proc_dostring(ctl_table *table, int write, struct file *filp,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ return -ENOSYS;
+}
+
+static int proc_doutsstring(ctl_table *table, int write, struct file *filp,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ return -ENOSYS;
+}
+
+int proc_dointvec(ctl_table *table, int write, struct file *filp,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ return -ENOSYS;
+}
+
+int proc_dointvec_bset(ctl_table *table, int write, struct file *filp,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ return -ENOSYS;
+}
+
+int proc_dointvec_minmax(ctl_table *table, int write, struct file *filp,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ return -ENOSYS;
+}
+
+int proc_dointvec_jiffies(ctl_table *table, int write, struct file *filp,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ return -ENOSYS;
+}
+
+int proc_dointvec_userhz_jiffies(ctl_table *table, int write, struct file *filp,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ return -ENOSYS;
+}
+
+int proc_dointvec_ms_jiffies(ctl_table *table, int write, struct file *filp,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ return -ENOSYS;
+}
+
+int proc_doulongvec_minmax(ctl_table *table, int write, struct file *filp,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ return -ENOSYS;
+}
+
+int proc_doulongvec_ms_jiffies_minmax(ctl_table *table, int write,
+ struct file *filp,
+ void __user *buffer,
+ size_t *lenp, loff_t *ppos)
+{
+ return -ENOSYS;
+}
+
+
+#endif /* CONFIG_PROC_FS */
+
+
+/*
+ * General sysctl support routines
+ */
+
+/* The generic string strategy routine: */
+int sysctl_string(ctl_table *table, int __user *name, int nlen,
+ void __user *oldval, size_t __user *oldlenp,
+ void __user *newval, size_t newlen, void **context)
+{
+ size_t l, len;
+
+ if (!table->data || !table->maxlen)
+ return -ENOTDIR;
+
+ if (oldval && oldlenp) {
+ if (get_user(len, oldlenp))
+ return -EFAULT;
+ if (len) {
+ l = strlen(table->data);
+ if (len > l) len = l;
+ if (len >= table->maxlen)
+ len = table->maxlen;
+ if(copy_to_user(oldval, table->data, len))
+ return -EFAULT;
+ if(put_user(0, ((char __user *) oldval) + len))
+ return -EFAULT;
+ if(put_user(len, oldlenp))
+ return -EFAULT;
+ }
+ }
+ if (newval && newlen) {
+ len = newlen;
+ if (len > table->maxlen)
+ len = table->maxlen;
+ if(copy_from_user(table->data, newval, len))
+ return -EFAULT;
+ if (len == table->maxlen)
+ len--;
+ ((char *) table->data)[len] = 0;
+ }
+ return 0;
+}
+
+/*
+ * This function makes sure that all of the integers in the vector
+ * are between the minimum and maximum values given in the arrays
+ * table->extra1 and table->extra2, respectively.
+ */
+int sysctl_intvec(ctl_table *table, int __user *name, int nlen,
+ void __user *oldval, size_t __user *oldlenp,
+ void __user *newval, size_t newlen, void **context)
+{
+
+ if (newval && newlen) {
+ int __user *vec = (int __user *) newval;
+ int *min = (int *) table->extra1;
+ int *max = (int *) table->extra2;
+ size_t length;
+ int i;
+
+ if (newlen % sizeof(int) != 0)
+ return -EINVAL;
+
+ if (!table->extra1 && !table->extra2)
+ return 0;
+
+ if (newlen > table->maxlen)
+ newlen = table->maxlen;
+ length = newlen / sizeof(int);
+
+ for (i = 0; i < length; i++) {
+ int value;
+ if (get_user(value, vec + i))
+ return -EFAULT;
+ if (min && value < min[i])
+ return -EINVAL;
+ if (max && value > max[i])
+ return -EINVAL;
+ }
+ }
+ return 0;
+}
+
+/* Strategy function to convert jiffies to seconds */
+int sysctl_jiffies(ctl_table *table, int __user *name, int nlen,
+ void __user *oldval, size_t __user *oldlenp,
+ void __user *newval, size_t newlen, void **context)
+{
+ if (oldval) {
+ size_t olen;
+ if (oldlenp) {
+ if (get_user(olen, oldlenp))
+ return -EFAULT;
+ if (olen!=sizeof(int))
+ return -EINVAL;
+ }
+ if (put_user(*(int *)(table->data)/HZ, (int __user *)oldval) ||
+ (oldlenp && put_user(sizeof(int),oldlenp)))
+ return -EFAULT;
+ }
+ if (newval && newlen) {
+ int new;
+ if (newlen != sizeof(int))
+ return -EINVAL;
+ if (get_user(new, (int __user *)newval))
+ return -EFAULT;
+ *(int *)(table->data) = new*HZ;
+ }
+ return 1;
+}
+
+/* Strategy function to convert jiffies to seconds */
+int sysctl_ms_jiffies(ctl_table *table, int __user *name, int nlen,
+ void __user *oldval, size_t __user *oldlenp,
+ void __user *newval, size_t newlen, void **context)
+{
+ if (oldval) {
+ size_t olen;
+ if (oldlenp) {
+ if (get_user(olen, oldlenp))
+ return -EFAULT;
+ if (olen!=sizeof(int))
+ return -EINVAL;
+ }
+ if (put_user(jiffies_to_msecs(*(int *)(table->data)), (int __user *)oldval) ||
+ (oldlenp && put_user(sizeof(int),oldlenp)))
+ return -EFAULT;
+ }
+ if (newval && newlen) {
+ int new;
+ if (newlen != sizeof(int))
+ return -EINVAL;
+ if (get_user(new, (int __user *)newval))
+ return -EFAULT;
+ *(int *)(table->data) = msecs_to_jiffies(new);
+ }
+ return 1;
+}
+
+#else /* CONFIG_SYSCTL */
+
+
+asmlinkage long sys_sysctl(struct __sysctl_args __user *args)
+{
+ return -ENOSYS;
+}
+
+int sysctl_string(ctl_table *table, int __user *name, int nlen,
+ void __user *oldval, size_t __user *oldlenp,
+ void __user *newval, size_t newlen, void **context)
+{
+ return -ENOSYS;
+}
+
+int sysctl_intvec(ctl_table *table, int __user *name, int nlen,
+ void __user *oldval, size_t __user *oldlenp,
+ void __user *newval, size_t newlen, void **context)
+{
+ return -ENOSYS;
+}
+
+int sysctl_jiffies(ctl_table *table, int __user *name, int nlen,
+ void __user *oldval, size_t __user *oldlenp,
+ void __user *newval, size_t newlen, void **context)
+{
+ return -ENOSYS;
+}
+
+int sysctl_ms_jiffies(ctl_table *table, int __user *name, int nlen,
+ void __user *oldval, size_t __user *oldlenp,
+ void __user *newval, size_t newlen, void **context)
+{
+ return -ENOSYS;
+}
+
+int proc_dostring(ctl_table *table, int write, struct file *filp,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ return -ENOSYS;
+}
+
+int proc_dointvec(ctl_table *table, int write, struct file *filp,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ return -ENOSYS;
+}
+
+int proc_dointvec_bset(ctl_table *table, int write, struct file *filp,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ return -ENOSYS;
+}
+
+int proc_dointvec_minmax(ctl_table *table, int write, struct file *filp,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ return -ENOSYS;
+}
+
+int proc_dointvec_jiffies(ctl_table *table, int write, struct file *filp,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ return -ENOSYS;
+}
+
+int proc_dointvec_userhz_jiffies(ctl_table *table, int write, struct file *filp,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ return -ENOSYS;
+}
+
+int proc_dointvec_ms_jiffies(ctl_table *table, int write, struct file *filp,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ return -ENOSYS;
+}
+
+int proc_doulongvec_minmax(ctl_table *table, int write, struct file *filp,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ return -ENOSYS;
+}
+
+int proc_doulongvec_ms_jiffies_minmax(ctl_table *table, int write,
+ struct file *filp,
+ void __user *buffer,
+ size_t *lenp, loff_t *ppos)
+{
+ return -ENOSYS;
+}
+
+struct ctl_table_header * register_sysctl_table(ctl_table * table,
+ int insert_at_head)
+{
+ return NULL;
+}
+
+void unregister_sysctl_table(struct ctl_table_header * table)
+{
+}
+
+#endif /* CONFIG_SYSCTL */
+
+/*
+ * No sense putting this after each symbol definition, twice,
+ * exception granted :-)
+ */
+EXPORT_SYMBOL(proc_dointvec);
+EXPORT_SYMBOL(proc_dointvec_jiffies);
+EXPORT_SYMBOL(proc_dointvec_minmax);
+EXPORT_SYMBOL(proc_dointvec_userhz_jiffies);
+EXPORT_SYMBOL(proc_dointvec_ms_jiffies);
+EXPORT_SYMBOL(proc_dostring);
+EXPORT_SYMBOL(proc_doulongvec_minmax);
+EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax);
+EXPORT_SYMBOL(register_sysctl_table);
+EXPORT_SYMBOL(sysctl_intvec);
+EXPORT_SYMBOL(sysctl_jiffies);
+EXPORT_SYMBOL(sysctl_ms_jiffies);
+EXPORT_SYMBOL(sysctl_string);
+EXPORT_SYMBOL(unregister_sysctl_table);
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