include/linux/mount.h

   1 /*
   2  *
   3  * Definitions for mount interface. This describes the in the kernel build
   4  * linkedlist with mounted filesystems.
   5  *
   6  * Author:  Marco van Wieringen <mvw@planets.elm.net>
   7  *
   8  * Version: $Id: mount.h,v 2.0 1996/11/17 16:48:14 mvw Exp mvw $
   9  *
  10  */
  11 #ifndef _LINUX_MOUNT_H
  12 #define _LINUX_MOUNT_H
  13
  14 #define DQUOT_USR_ENABLED       0x01            /* User diskquotas enabled */
  15 #define DQUOT_GRP_ENABLED       0x02            /* Group diskquotas enabled */
  16
  17 struct quota_mount_options
  18 {
  19         unsigned int flags;                     /* Flags for diskquotas on this device */
  20         struct semaphore semaphore;             /* lock device while I/O in progress */
  21         struct file *files[MAXQUOTAS];          /* fp's to quotafiles */
  22         time_t inode_expire[MAXQUOTAS];         /* expiretime for inode-quota */
  23         time_t block_expire[MAXQUOTAS];         /* expiretime for block-quota */
  24         char rsquash[MAXQUOTAS];                /* for quotas threath root as any other user */
  25 };
  26
  27 struct vfsmount
  28 {
  29   kdev_t mnt_dev;                       /* Device this applies to */
  30   char *mnt_devname;                    /* Name of device e.g. /dev/dsk/hda1 */
  31   char *mnt_dirname;                    /* Name of directory mounted on */
  32   unsigned int mnt_flags;               /* Flags of this device */
  33   struct super_block *mnt_sb;           /* pointer to superblock */
  34   struct quota_mount_options mnt_dquot; /* Diskquota specific mount options */
  35   struct vfsmount *mnt_next;            /* pointer to next in linkedlist */
  36 };
  37
  38 struct vfsmount *lookup_vfsmnt(kdev_t dev);
  39
  40 /*
  41  *      Umount options
  42  */
  43
  44 #define MNT_FORCE       0x00000001      /* Attempt to forcibily umount */
  45
  46 #endif /* _LINUX_MOUNT_H */