| /* |
| * 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/mm.h> |
| #include <linux/slab.h> |
| #include <linux/sysctl.h> |
| #include <linux/swapctl.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/sysrq.h> |
| #include <linux/highuid.h> |
| |
| #include <asm/uaccess.h> |
| |
| #ifdef CONFIG_ROOT_NFS |
| #include <linux/nfs_fs.h> |
| #endif |
| |
| #if defined(CONFIG_SYSCTL) |
| |
| /* External variables not in a header file. */ |
| extern int panic_timeout; |
| extern int C_A_D; |
| extern int bdf_prm[], bdflush_min[], bdflush_max[]; |
| extern int sysctl_overcommit_memory; |
| extern int max_threads; |
| extern atomic_t nr_queued_signals; |
| extern int max_queued_signals; |
| extern int sysrq_enabled; |
| extern int core_uses_pid; |
| extern int cad_pid; |
| |
| /* this is needed for the proc_dointvec_minmax for [fs_]overflow UID and GID */ |
| static int maxolduid = 65535; |
| static int minolduid; |
| |
| #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; |
| #endif |
| |
| #ifdef CONFIG_ARCH_S390 |
| #ifdef CONFIG_MATHEMU |
| extern int sysctl_ieee_emulation_warnings; |
| #endif |
| extern int sysctl_userprocess_debug; |
| #endif |
| |
| #ifdef CONFIG_PPC32 |
| extern unsigned long zero_paged_on, powersave_nap; |
| int proc_dol2crvec(ctl_table *table, int write, struct file *filp, |
| void *buffer, size_t *lenp); |
| #endif |
| |
| #ifdef CONFIG_BSD_PROCESS_ACCT |
| extern int acct_parm[]; |
| #endif |
| |
| static int parse_table(int *, int, void *, size_t *, void *, size_t, |
| ctl_table *, void **); |
| static int proc_doutsstring(ctl_table *table, int write, struct file *filp, |
| void *buffer, size_t *lenp); |
| |
| 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[]; |
| |
| /* /proc declarations: */ |
| |
| #ifdef CONFIG_PROC_FS |
| |
| static ssize_t proc_readsys(struct file *, char *, size_t, loff_t *); |
| static ssize_t proc_writesys(struct file *, const char *, size_t, loff_t *); |
| static int proc_sys_permission(struct inode *, int); |
| |
| struct file_operations proc_sys_file_operations = { |
| read: proc_readsys, |
| write: proc_writesys, |
| }; |
| |
| static struct inode_operations proc_sys_inode_operations = { |
| permission: proc_sys_permission, |
| }; |
| |
| 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_KERN, "kernel", NULL, 0, 0555, kern_table}, |
| {CTL_VM, "vm", NULL, 0, 0555, vm_table}, |
| #ifdef CONFIG_NET |
| {CTL_NET, "net", NULL, 0, 0555, net_table}, |
| #endif |
| {CTL_PROC, "proc", NULL, 0, 0555, proc_table}, |
| {CTL_FS, "fs", NULL, 0, 0555, fs_table}, |
| {CTL_DEBUG, "debug", NULL, 0, 0555, debug_table}, |
| {CTL_DEV, "dev", NULL, 0, 0555, dev_table}, |
| {0} |
| }; |
| |
| static ctl_table kern_table[] = { |
| {KERN_OSTYPE, "ostype", system_utsname.sysname, 64, |
| 0444, NULL, &proc_doutsstring, &sysctl_string}, |
| {KERN_OSRELEASE, "osrelease", system_utsname.release, 64, |
| 0444, NULL, &proc_doutsstring, &sysctl_string}, |
| {KERN_VERSION, "version", system_utsname.version, 64, |
| 0444, NULL, &proc_doutsstring, &sysctl_string}, |
| {KERN_NODENAME, "hostname", system_utsname.nodename, 64, |
| 0644, NULL, &proc_doutsstring, &sysctl_string}, |
| {KERN_DOMAINNAME, "domainname", system_utsname.domainname, 64, |
| 0644, NULL, &proc_doutsstring, &sysctl_string}, |
| {KERN_PANIC, "panic", &panic_timeout, sizeof(int), |
| 0644, NULL, &proc_dointvec}, |
| {KERN_CORE_USES_PID, "core_uses_pid", &core_uses_pid, sizeof(int), |
| 0644, NULL, &proc_dointvec}, |
| {KERN_TAINTED, "tainted", &tainted, sizeof(int), |
| 0644, NULL, &proc_dointvec}, |
| {KERN_CAP_BSET, "cap-bound", &cap_bset, sizeof(kernel_cap_t), |
| 0600, NULL, &proc_dointvec_bset}, |
| #ifdef CONFIG_BLK_DEV_INITRD |
| {KERN_REALROOTDEV, "real-root-dev", &real_root_dev, sizeof(int), |
| 0644, NULL, &proc_dointvec}, |
| #endif |
| #ifdef __sparc__ |
| {KERN_SPARC_REBOOT, "reboot-cmd", reboot_command, |
| 256, 0644, NULL, &proc_dostring, &sysctl_string }, |
| {KERN_SPARC_STOP_A, "stop-a", &stop_a_enabled, sizeof (int), |
| 0644, NULL, &proc_dointvec}, |
| #endif |
| #ifdef CONFIG_PPC32 |
| {KERN_PPC_ZEROPAGED, "zero-paged", &zero_paged_on, sizeof(int), |
| 0644, NULL, &proc_dointvec}, |
| {KERN_PPC_POWERSAVE_NAP, "powersave-nap", &powersave_nap, sizeof(int), |
| 0644, NULL, &proc_dointvec}, |
| {KERN_PPC_L2CR, "l2cr", NULL, 0, |
| 0644, NULL, &proc_dol2crvec}, |
| #endif |
| {KERN_CTLALTDEL, "ctrl-alt-del", &C_A_D, sizeof(int), |
| 0644, NULL, &proc_dointvec}, |
| {KERN_PRINTK, "printk", &console_loglevel, 4*sizeof(int), |
| 0644, NULL, &proc_dointvec}, |
| #ifdef CONFIG_KMOD |
| {KERN_MODPROBE, "modprobe", &modprobe_path, 256, |
| 0644, NULL, &proc_dostring, &sysctl_string }, |
| #endif |
| #ifdef CONFIG_HOTPLUG |
| {KERN_HOTPLUG, "hotplug", &hotplug_path, 256, |
| 0644, NULL, &proc_dostring, &sysctl_string }, |
| #endif |
| #ifdef CONFIG_CHR_DEV_SG |
| {KERN_SG_BIG_BUFF, "sg-big-buff", &sg_big_buff, sizeof (int), |
| 0444, NULL, &proc_dointvec}, |
| #endif |
| #ifdef CONFIG_BSD_PROCESS_ACCT |
| {KERN_ACCT, "acct", &acct_parm, 3*sizeof(int), |
| 0644, NULL, &proc_dointvec}, |
| #endif |
| {KERN_RTSIGNR, "rtsig-nr", &nr_queued_signals, sizeof(int), |
| 0444, NULL, &proc_dointvec}, |
| {KERN_RTSIGMAX, "rtsig-max", &max_queued_signals, sizeof(int), |
| 0644, NULL, &proc_dointvec}, |
| #ifdef CONFIG_SYSVIPC |
| {KERN_SHMMAX, "shmmax", &shm_ctlmax, sizeof (size_t), |
| 0644, NULL, &proc_doulongvec_minmax}, |
| {KERN_SHMALL, "shmall", &shm_ctlall, sizeof (size_t), |
| 0644, NULL, &proc_doulongvec_minmax}, |
| {KERN_SHMMNI, "shmmni", &shm_ctlmni, sizeof (int), |
| 0644, NULL, &proc_dointvec}, |
| {KERN_MSGMAX, "msgmax", &msg_ctlmax, sizeof (int), |
| 0644, NULL, &proc_dointvec}, |
| {KERN_MSGMNI, "msgmni", &msg_ctlmni, sizeof (int), |
| 0644, NULL, &proc_dointvec}, |
| {KERN_MSGMNB, "msgmnb", &msg_ctlmnb, sizeof (int), |
| 0644, NULL, &proc_dointvec}, |
| {KERN_SEM, "sem", &sem_ctls, 4*sizeof (int), |
| 0644, NULL, &proc_dointvec}, |
| #endif |
| #ifdef CONFIG_MAGIC_SYSRQ |
| {KERN_SYSRQ, "sysrq", &sysrq_enabled, sizeof (int), |
| 0644, NULL, &proc_dointvec}, |
| #endif |
| {KERN_CADPID, "cad_pid", &cad_pid, sizeof (int), |
| 0600, NULL, &proc_dointvec}, |
| {KERN_MAX_THREADS, "threads-max", &max_threads, sizeof(int), |
| 0644, NULL, &proc_dointvec}, |
| {KERN_RANDOM, "random", NULL, 0, 0555, random_table}, |
| {KERN_OVERFLOWUID, "overflowuid", &overflowuid, sizeof(int), 0644, NULL, |
| &proc_dointvec_minmax, &sysctl_intvec, NULL, |
| &minolduid, &maxolduid}, |
| {KERN_OVERFLOWGID, "overflowgid", &overflowgid, sizeof(int), 0644, NULL, |
| &proc_dointvec_minmax, &sysctl_intvec, NULL, |
| &minolduid, &maxolduid}, |
| #ifdef CONFIG_ARCH_S390 |
| #ifdef CONFIG_MATHEMU |
| {KERN_IEEE_EMULATION_WARNINGS,"ieee_emulation_warnings", |
| &sysctl_ieee_emulation_warnings,sizeof(int),0644,NULL,&proc_dointvec}, |
| #endif |
| {KERN_S390_USER_DEBUG_LOGGING,"userprocess_debug", |
| &sysctl_userprocess_debug,sizeof(int),0644,NULL,&proc_dointvec}, |
| #endif |
| {0} |
| }; |
| |
| static ctl_table vm_table[] = { |
| {VM_BDFLUSH, "bdflush", &bdf_prm, 9*sizeof(int), 0644, NULL, |
| &proc_dointvec_minmax, &sysctl_intvec, NULL, |
| &bdflush_min, &bdflush_max}, |
| {VM_OVERCOMMIT_MEMORY, "overcommit_memory", &sysctl_overcommit_memory, |
| sizeof(sysctl_overcommit_memory), 0644, NULL, &proc_dointvec}, |
| {VM_PAGERDAEMON, "kswapd", |
| &pager_daemon, sizeof(pager_daemon_t), 0644, NULL, &proc_dointvec}, |
| {VM_PAGE_CLUSTER, "page-cluster", |
| &page_cluster, sizeof(int), 0644, NULL, &proc_dointvec}, |
| {0} |
| }; |
| |
| static ctl_table proc_table[] = { |
| {0} |
| }; |
| |
| static ctl_table fs_table[] = { |
| {FS_NRINODE, "inode-nr", &inodes_stat, 2*sizeof(int), |
| 0444, NULL, &proc_dointvec}, |
| {FS_STATINODE, "inode-state", &inodes_stat, 7*sizeof(int), |
| 0444, NULL, &proc_dointvec}, |
| {FS_NRFILE, "file-nr", &files_stat, 3*sizeof(int), |
| 0444, NULL, &proc_dointvec}, |
| {FS_MAXFILE, "file-max", &files_stat.max_files, sizeof(int), |
| 0644, NULL, &proc_dointvec}, |
| {FS_DENTRY, "dentry-state", &dentry_stat, 6*sizeof(int), |
| 0444, NULL, &proc_dointvec}, |
| {FS_OVERFLOWUID, "overflowuid", &fs_overflowuid, sizeof(int), 0644, NULL, |
| &proc_dointvec_minmax, &sysctl_intvec, NULL, |
| &minolduid, &maxolduid}, |
| {FS_OVERFLOWGID, "overflowgid", &fs_overflowgid, sizeof(int), 0644, NULL, |
| &proc_dointvec_minmax, &sysctl_intvec, NULL, |
| &minolduid, &maxolduid}, |
| {FS_LEASES, "leases-enable", &leases_enable, sizeof(int), |
| 0644, NULL, &proc_dointvec}, |
| {FS_DIR_NOTIFY, "dir-notify-enable", &dir_notify_enable, |
| sizeof(int), 0644, NULL, &proc_dointvec}, |
| {FS_LEASE_TIME, "lease-break-time", &lease_break_time, sizeof(int), |
| 0644, NULL, &proc_dointvec}, |
| {0} |
| }; |
| |
| static ctl_table debug_table[] = { |
| {0} |
| }; |
| |
| static ctl_table dev_table[] = { |
| {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 *name, int nlen, void *oldval, size_t *oldlenp, |
| void *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; |
| } |
| |
| extern asmlinkage long sys_sysctl(struct __sysctl_args *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) |
| { |
| return test_perm(table->mode, op); |
| } |
| |
| static int parse_table(int *name, int nlen, |
| void *oldval, size_t *oldlenp, |
| void *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 *name, int nlen, |
| void *oldval, size_t *oldlenp, |
| void *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) { |
| get_user(len, oldlenp); |
| 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_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; |
| de->proc_iops = &proc_sys_inode_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 * 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; |
| |
| /* |
| * FIXME: we need to pass on ppos to the handler. |
| */ |
| |
| error = (*table->proc_handler) (table, write, file, buf, &res); |
| if (error) |
| return error; |
| return res; |
| } |
| |
| static ssize_t proc_readsys(struct file * file, char * 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 * buf, |
| size_t count, loff_t *ppos) |
| { |
| return do_rw_proc(1, file, (char *) buf, count, ppos); |
| } |
| |
| static int proc_sys_permission(struct inode *inode, int op) |
| { |
| return test_perm(inode->i_mode, op); |
| } |
| |
| /** |
| * 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 |
| * |
| * 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 *buffer, size_t *lenp) |
| { |
| size_t len; |
| char *p, c; |
| |
| if (!table->data || !table->maxlen || !*lenp || |
| (filp->f_pos && !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; |
| filp->f_pos += *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 *) buffer) + len)) |
| return -EFAULT; |
| len++; |
| } |
| *lenp = len; |
| filp->f_pos += 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 *buffer, size_t *lenp) |
| { |
| int r; |
| |
| if (!write) { |
| down_read(&uts_sem); |
| r=proc_dostring(table,0,filp,buffer,lenp); |
| up_read(&uts_sem); |
| } else { |
| down_write(&uts_sem); |
| r=proc_dostring(table,1,filp,buffer,lenp); |
| up_write(&uts_sem); |
| } |
| return r; |
| } |
| |
| #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(ctl_table *table, int write, struct file *filp, |
| void *buffer, size_t *lenp, int conv, int op) |
| { |
| int *i, vleft, first=1, neg, val; |
| size_t left, len; |
| |
| #define TMPBUFLEN 20 |
| char buf[TMPBUFLEN], *p; |
| |
| if (!table->data || !table->maxlen || !*lenp || |
| (filp->f_pos && !write)) { |
| *lenp = 0; |
| return 0; |
| } |
| |
| i = (int *) table->data; |
| vleft = table->maxlen / sizeof(int); |
| left = *lenp; |
| |
| for (; left && vleft--; i++, first=0) { |
| if (write) { |
| while (left) { |
| char c; |
| if(get_user(c,(char *) buffer)) |
| return -EFAULT; |
| if (!isspace(c)) |
| break; |
| left--; |
| ((char *) buffer)++; |
| } |
| if (!left) |
| break; |
| neg = 0; |
| len = left; |
| if (len > TMPBUFLEN-1) |
| len = TMPBUFLEN-1; |
| if(copy_from_user(buf, buffer, 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) * conv; |
| len = p-buf; |
| if ((len < left) && *p && !isspace(*p)) |
| break; |
| if (neg) |
| val = -val; |
| buffer += len; |
| left -= len; |
| switch(op) { |
| case OP_SET: *i = val; break; |
| case OP_AND: *i &= val; break; |
| case OP_OR: *i |= val; break; |
| case OP_MAX: if(*i < val) |
| *i = val; |
| break; |
| case OP_MIN: if(*i > val) |
| *i = val; |
| break; |
| } |
| } else { |
| p = buf; |
| if (!first) |
| *p++ = '\t'; |
| sprintf(p, "%d", (*i) / conv); |
| len = strlen(buf); |
| if (len > left) |
| len = left; |
| if(copy_to_user(buffer, buf, len)) |
| return -EFAULT; |
| left -= len; |
| buffer += len; |
| } |
| } |
| |
| if (!write && !first && left) { |
| if(put_user('\n', (char *) buffer)) |
| return -EFAULT; |
| left--, buffer++; |
| } |
| if (write) { |
| p = (char *) buffer; |
| while (left) { |
| char c; |
| if(get_user(c, p++)) |
| return -EFAULT; |
| if (!isspace(c)) |
| break; |
| left--; |
| } |
| } |
| if (write && first) |
| return -EINVAL; |
| *lenp -= left; |
| filp->f_pos += *lenp; |
| return 0; |
| } |
| |
| /** |
| * 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 |
| * |
| * 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 *buffer, size_t *lenp) |
| { |
| return do_proc_dointvec(table,write,filp,buffer,lenp,1,OP_SET); |
| } |
| |
| /* |
| * init may raise the set. |
| */ |
| |
| int proc_dointvec_bset(ctl_table *table, int write, struct file *filp, |
| void *buffer, size_t *lenp) |
| { |
| if (!capable(CAP_SYS_MODULE)) { |
| return -EPERM; |
| } |
| return do_proc_dointvec(table,write,filp,buffer,lenp,1, |
| (current->pid == 1) ? OP_SET : OP_AND); |
| } |
| |
| /** |
| * 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 |
| * |
| * 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 *buffer, size_t *lenp) |
| { |
| int *i, *min, *max, vleft, first=1, neg, val; |
| size_t len, left; |
| #define TMPBUFLEN 20 |
| char buf[TMPBUFLEN], *p; |
| |
| if (!table->data || !table->maxlen || !*lenp || |
| (filp->f_pos && !write)) { |
| *lenp = 0; |
| return 0; |
| } |
| |
| i = (int *) table->data; |
| min = (int *) table->extra1; |
| max = (int *) table->extra2; |
| vleft = table->maxlen / sizeof(int); |
| left = *lenp; |
| |
| for (; left && vleft--; i++, first=0) { |
| if (write) { |
| while (left) { |
| char c; |
| if(get_user(c, (char *) buffer)) |
| return -EFAULT; |
| if (!isspace(c)) |
| break; |
| left--; |
| ((char *) buffer)++; |
| } |
| if (!left) |
| break; |
| neg = 0; |
| len = left; |
| if (len > TMPBUFLEN-1) |
| len = TMPBUFLEN-1; |
| if(copy_from_user(buf, buffer, 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); |
| len = p-buf; |
| if ((len < left) && *p && !isspace(*p)) |
| break; |
| if (neg) |
| val = -val; |
| buffer += len; |
| left -= len; |
| |
| if (min && val < *min++) |
| continue; |
| if (max && val > *max++) |
| continue; |
| *i = val; |
| } else { |
| p = buf; |
| if (!first) |
| *p++ = '\t'; |
| sprintf(p, "%d", *i); |
| len = strlen(buf); |
| if (len > left) |
| len = left; |
| if(copy_to_user(buffer, buf, len)) |
| return -EFAULT; |
| left -= len; |
| buffer += len; |
| } |
| } |
| |
| if (!write && !first && left) { |
| if(put_user('\n', (char *) buffer)) |
| return -EFAULT; |
| left--, buffer++; |
| } |
| if (write) { |
| p = (char *) buffer; |
| while (left) { |
| char c; |
| if(get_user(c, p++)) |
| return -EFAULT; |
| if (!isspace(c)) |
| break; |
| left--; |
| } |
| } |
| if (write && first) |
| return -EINVAL; |
| *lenp -= left; |
| filp->f_pos += *lenp; |
| return 0; |
| } |
| |
| static int do_proc_doulongvec_minmax(ctl_table *table, int write, |
| struct file *filp, |
| void *buffer, size_t *lenp, |
| unsigned long convmul, |
| unsigned long convdiv) |
| { |
| #define TMPBUFLEN 20 |
| unsigned long *i, *min, *max, val; |
| int vleft, first=1, neg; |
| size_t len, left; |
| char buf[TMPBUFLEN], *p; |
| |
| if (!table->data || !table->maxlen || !*lenp || |
| (filp->f_pos && !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++, first=0) { |
| if (write) { |
| while (left) { |
| char c; |
| if(get_user(c, (char *) buffer)) |
| return -EFAULT; |
| if (!isspace(c)) |
| break; |
| left--; |
| ((char *) buffer)++; |
| } |
| if (!left) |
| break; |
| neg = 0; |
| len = left; |
| if (len > TMPBUFLEN-1) |
| len = TMPBUFLEN-1; |
| if(copy_from_user(buf, buffer, 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; |
| buffer += len; |
| left -= len; |
| |
| if(neg) |
| continue; |
| if (min && val < *min++) |
| continue; |
| if (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(buffer, buf, len)) |
| return -EFAULT; |
| left -= len; |
| buffer += len; |
| } |
| } |
| |
| if (!write && !first && left) { |
| if(put_user('\n', (char *) buffer)) |
| return -EFAULT; |
| left--, buffer++; |
| } |
| if (write) { |
| p = (char *) buffer; |
| while (left) { |
| char c; |
| if(get_user(c, p++)) |
| return -EFAULT; |
| if (!isspace(c)) |
| break; |
| left--; |
| } |
| } |
| if (write && first) |
| return -EINVAL; |
| *lenp -= left; |
| filp->f_pos += *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 |
| * |
| * 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 *buffer, size_t *lenp) |
| { |
| return do_proc_doulongvec_minmax(table, write, filp, buffer, lenp, 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 |
| * |
| * 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 *buffer, size_t *lenp) |
| { |
| return do_proc_doulongvec_minmax(table, write, filp, buffer, |
| lenp, HZ, 1000l); |
| } |
| |
| |
| /** |
| * 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 |
| * |
| * 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 *buffer, size_t *lenp) |
| { |
| return do_proc_dointvec(table,write,filp,buffer,lenp,HZ,OP_SET); |
| } |
| |
| #else /* CONFIG_PROC_FS */ |
| |
| int proc_dostring(ctl_table *table, int write, struct file *filp, |
| void *buffer, size_t *lenp) |
| { |
| return -ENOSYS; |
| } |
| |
| static int proc_doutsstring(ctl_table *table, int write, struct file *filp, |
| void *buffer, size_t *lenp) |
| { |
| return -ENOSYS; |
| } |
| |
| int proc_dointvec(ctl_table *table, int write, struct file *filp, |
| void *buffer, size_t *lenp) |
| { |
| return -ENOSYS; |
| } |
| |
| int proc_dointvec_bset(ctl_table *table, int write, struct file *filp, |
| void *buffer, size_t *lenp) |
| { |
| return -ENOSYS; |
| } |
| |
| int proc_dointvec_minmax(ctl_table *table, int write, struct file *filp, |
| void *buffer, size_t *lenp) |
| { |
| return -ENOSYS; |
| } |
| |
| int proc_dointvec_jiffies(ctl_table *table, int write, struct file *filp, |
| void *buffer, size_t *lenp) |
| { |
| return -ENOSYS; |
| } |
| |
| int proc_doulongvec_minmax(ctl_table *table, int write, struct file *filp, |
| void *buffer, size_t *lenp) |
| { |
| return -ENOSYS; |
| } |
| |
| int proc_doulongvec_ms_jiffies_minmax(ctl_table *table, int write, |
| struct file *filp, |
| void *buffer, size_t *lenp) |
| { |
| return -ENOSYS; |
| } |
| |
| |
| #endif /* CONFIG_PROC_FS */ |
| |
| |
| /* |
| * General sysctl support routines |
| */ |
| |
| /* The generic string strategy routine: */ |
| int sysctl_string(ctl_table *table, int *name, int nlen, |
| void *oldval, size_t *oldlenp, |
| void *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 *) 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 *name, int nlen, |
| void *oldval, size_t *oldlenp, |
| void *newval, size_t newlen, void **context) |
| { |
| int i, *vec, *min, *max; |
| size_t length; |
| |
| if (newval && newlen) { |
| 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); |
| |
| vec = (int *) newval; |
| min = (int *) table->extra1; |
| max = (int *) table->extra2; |
| |
| for (i = 0; i < length; i++) { |
| int value; |
| get_user(value, vec + i); |
| 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 *name, int nlen, |
| void *oldval, size_t *oldlenp, |
| void *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 *)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 *)newval)) |
| return -EFAULT; |
| *(int *)(table->data) = new*HZ; |
| } |
| return 1; |
| } |
| |
| |
| #else /* CONFIG_SYSCTL */ |
| |
| |
| extern asmlinkage long sys_sysctl(struct __sysctl_args *args) |
| { |
| return -ENOSYS; |
| } |
| |
| int sysctl_string(ctl_table *table, int *name, int nlen, |
| void *oldval, size_t *oldlenp, |
| void *newval, size_t newlen, void **context) |
| { |
| return -ENOSYS; |
| } |
| |
| int sysctl_intvec(ctl_table *table, int *name, int nlen, |
| void *oldval, size_t *oldlenp, |
| void *newval, size_t newlen, void **context) |
| { |
| return -ENOSYS; |
| } |
| |
| int sysctl_jiffies(ctl_table *table, int *name, int nlen, |
| void *oldval, size_t *oldlenp, |
| void *newval, size_t newlen, void **context) |
| { |
| return -ENOSYS; |
| } |
| |
| int proc_dostring(ctl_table *table, int write, struct file *filp, |
| void *buffer, size_t *lenp) |
| { |
| return -ENOSYS; |
| } |
| |
| int proc_dointvec(ctl_table *table, int write, struct file *filp, |
| void *buffer, size_t *lenp) |
| { |
| return -ENOSYS; |
| } |
| |
| int proc_dointvec_bset(ctl_table *table, int write, struct file *filp, |
| void *buffer, size_t *lenp) |
| { |
| return -ENOSYS; |
| } |
| |
| int proc_dointvec_minmax(ctl_table *table, int write, struct file *filp, |
| void *buffer, size_t *lenp) |
| { |
| return -ENOSYS; |
| } |
| |
| int proc_dointvec_jiffies(ctl_table *table, int write, struct file *filp, |
| void *buffer, size_t *lenp) |
| { |
| return -ENOSYS; |
| } |
| |
| int proc_doulongvec_minmax(ctl_table *table, int write, struct file *filp, |
| void *buffer, size_t *lenp) |
| { |
| return -ENOSYS; |
| } |
| |
| int proc_doulongvec_ms_jiffies_minmax(ctl_table *table, int write, |
| struct file *filp, |
| void *buffer, size_t *lenp) |
| { |
| return -ENOSYS; |
| } |
| |
| struct ctl_table_header * register_sysctl_table(ctl_table * table, |
| int insert_at_head) |
| { |
| return 0; |
| } |
| |
| void unregister_sysctl_table(struct ctl_table_header * table) |
| { |
| } |
| |
| #endif /* CONFIG_SYSCTL */ |