fs/ext2/ioctl.c

/* */
This source file includes following definitions.
ext2_ioctl
   1 /*
   2  * linux/fs/ext2/ioctl.c
   3  *
   4  * Copyright (C) 1993, 1994  Remy Card (card@masi.ibp.fr)
   5  *                           Laboratoire MASI - Institut Blaise Pascal
   6  *                           Universite Pierre et Marie Curie (Paris VI)
   7  */
   8 
   9 #include <asm/segment.h>
  10 
  11 #include <linux/errno.h>
  12 #include <linux/fs.h>
  13 #include <linux/ext2_fs.h>
  14 #include <linux/ioctl.h>
  15 #include <linux/sched.h>
  16 
  17 int ext2_ioctl (struct inode * inode, struct file * filp, unsigned int cmd,
     /*  */
  18                 unsigned long arg)
  19 {
  20         int err;
  21 
  22         ext2_debug ("cmd = %u, arg = %lu\n", cmd, arg);
  23 
  24         switch (cmd) {
  25         case EXT2_IOC_GETFLAGS:
  26                 if ((err = verify_area (VERIFY_WRITE, (long *) arg, sizeof(long))))
  27                         return err;
  28                 put_fs_long (inode->u.ext2_i.i_flags, (long *) arg);
  29                 return 0;
  30         case EXT2_IOC_SETFLAGS:
  31                 if ((current->euid != inode->i_uid) && !suser())
  32                         return -EPERM;
  33                 if (IS_RDONLY(inode))
  34                         return -EROFS;
  35                 inode->u.ext2_i.i_flags = get_fs_long ((long *) arg);
  36                 inode->i_ctime = CURRENT_TIME;
  37                 inode->i_dirt = 1;
  38                 return 0;
  39         case EXT2_IOC_GETVERSION:
  40                 if ((err = verify_area (VERIFY_WRITE, (long *) arg, sizeof(long))))
  41                         return err;
  42                 put_fs_long (inode->u.ext2_i.i_version, (long *) arg);
  43                 return 0;
  44         case EXT2_IOC_SETVERSION:
  45                 if ((current->euid != inode->i_uid) && !suser())
  46                         return -EPERM;
  47                 if (IS_RDONLY(inode))
  48                         return -EROFS;
  49                 inode->u.ext2_i.i_version = get_fs_long ((long *) arg);
  50                 inode->i_ctime = CURRENT_TIME;
  51                 inode->i_dirt = 1;
  52                 return 0;
  53         default:
  54                 return -EINVAL;
  55         }
  56 }
/* */
root/fs/ext2/ioctl.c

DEFINITIONS
