fs/isofs/blkdev.c

/* */
This source file includes following definitions.
blkdev_open
   1 /*
   2  *  linux/fs/isofs/blkdev.c
   3  *
   4  *  (C) 1992  Eric Youngdale Modified for ISO9660 filesystem.
   5  *
   6  *  Copyright (C) 1991, 1992  Linus Torvalds
   7  *
   8  *  isofs blkdev handling code.  This is only used with the Rock Ridge
   9  *  extensions to iso9660
  10  */
  11 
  12 #include <linux/errno.h>
  13 #include <linux/sched.h>
  14 #include <linux/iso_fs.h>
  15 #include <linux/tty.h>
  16 #include <linux/stat.h>
  17 #include <linux/fcntl.h>
  18 
  19 /*
  20  * Called every time a isofs block special file is opened
  21  */
  22 static int blkdev_open(struct inode * inode, struct file * filp)
     /*  */
  23 {
  24         int i;
  25 
  26         i = MAJOR(inode->i_rdev);
  27         if (i < MAX_BLKDEV) {
  28                 filp->f_op = blkdev_fops[i];
  29                 if (filp->f_op && filp->f_op->open)
  30                         return filp->f_op->open(inode,filp);
  31         }
  32         return 0;
  33 }       
  34 
  35 /*
  36  * Dummy default file-operations: the only thing this does
  37  * is contain the open that then fills in the correct operations
  38  * depending on the special file...
  39  */
  40 static struct file_operations def_blk_fops = {
  41         NULL,           /* lseek */
  42         NULL,           /* read */
  43         NULL,           /* write */
  44         NULL,           /* readdir */
  45         NULL,           /* select */
  46         NULL,           /* ioctl */
  47         NULL,           /* mmap */
  48         blkdev_open,    /* open */
  49         NULL,           /* release */
  50 };
  51 
  52 struct inode_operations isofs_blkdev_inode_operations = {
  53         &def_blk_fops,          /* default file operations */
  54         NULL,                   /* create */
  55         NULL,                   /* lookup */
  56         NULL,                   /* link */
  57         NULL,                   /* unlink */
  58         NULL,                   /* symlink */
  59         NULL,                   /* mkdir */
  60         NULL,                   /* rmdir */
  61         NULL,                   /* mknod */
  62         NULL,                   /* rename */
  63         NULL,                   /* readlink */
  64         NULL,                   /* follow_link */
  65         isofs_bmap,             /* bmap */
  66         NULL                    /* truncate */
  67 };
/* */
root/fs/isofs/blkdev.c

DEFINITIONS
