Revert "proc: revert /proc/uptime to ->read_proc hook"

[safe/jmp/linux-2.6] / fs / proc / proc_sysctl.c

diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c
index 945a810..9b1e4e9 100644 (file)
--- a/fs/proc/proc_sysctl.c
+++ b/fs/proc/proc_sysctl.c
@@ -1,13 +1,13 @@
 /*
  * /proc/sys support
  */
-
+#include <linux/init.h>
 #include <linux/sysctl.h>
 #include <linux/proc_fs.h>
 #include <linux/security.h>
 #include "internal.h"
 
-static struct dentry_operations proc_sys_dentry_operations;
+static const struct dentry_operations proc_sys_dentry_operations;
 static const struct file_operations proc_sys_file_operations;
 static const struct inode_operations proc_sys_inode_operations;
 static const struct file_operations proc_sys_dir_file_operations;
@@ -298,13 +298,19 @@ static int proc_sys_permission(struct inode *inode, int mask)
         * sysctl entries that are not writeable,
         * are _NOT_ writeable, capabilities or not.
         */
-       struct ctl_table_header *head = grab_header(inode);
-       struct ctl_table *table = PROC_I(inode)->sysctl_entry;
+       struct ctl_table_header *head;
+       struct ctl_table *table;
        int error;
 
+       /* Executable files are not allowed under /proc/sys/ */
+       if ((mask & MAY_EXEC) && S_ISREG(inode->i_mode))
+               return -EACCES;
+
+       head = grab_header(inode);
        if (IS_ERR(head))
                return PTR_ERR(head);
 
+       table = PROC_I(inode)->sysctl_entry;
        if (!table) /* global root - r-xr-xr-x */
                error = mask & MAY_WRITE ? -EACCES : 0;
        else /* Use the permissions on the sysctl table entry */
@@ -353,6 +359,7 @@ static const struct file_operations proc_sys_file_operations = {
 
 static const struct file_operations proc_sys_dir_file_operations = {
        .readdir        = proc_sys_readdir,
+       .llseek         = generic_file_llseek,
 };
 
 static const struct inode_operations proc_sys_inode_operations = {
@@ -389,13 +396,13 @@ static int proc_sys_compare(struct dentry *dir, struct qstr *qstr,
        return !sysctl_is_seen(PROC_I(dentry->d_inode)->sysctl);
 }
 
-static struct dentry_operations proc_sys_dentry_operations = {
+static const struct dentry_operations proc_sys_dentry_operations = {
        .d_revalidate   = proc_sys_revalidate,
        .d_delete       = proc_sys_delete,
        .d_compare      = proc_sys_compare,
 };
 
-int proc_sys_init(void)
+int __init proc_sys_init(void)
 {
        struct proc_dir_entry *proc_sys_root;