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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 422 | giacomo | 1 | /* |
| 2 | * |
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| 3 | * Definitions for mount interface. This describes the in the kernel build |
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| 4 | * linkedlist with mounted filesystems. |
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| 5 | * |
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| 6 | * Author: Marco van Wieringen <mvw@planets.elm.net> |
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| 7 | * |
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| 8 | * Version: $Id: mount.h,v 1.1 2004-01-28 15:26:00 giacomo Exp $ |
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| 9 | * |
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| 10 | */ |
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| 11 | #ifndef _LINUX_MOUNT_H |
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| 12 | #define _LINUX_MOUNT_H |
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| 13 | #ifdef __KERNEL__ |
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| 14 | |||
| 15 | #include <linux/list.h> |
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| 16 | |||
| 17 | #define MNT_NOSUID 1 |
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| 18 | #define MNT_NODEV 2 |
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| 19 | #define MNT_NOEXEC 4 |
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| 20 | |||
| 21 | struct vfsmount |
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| 22 | { |
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| 23 | struct list_head mnt_hash; |
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| 24 | struct vfsmount *mnt_parent; /* fs we are mounted on */ |
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| 25 | struct dentry *mnt_mountpoint; /* dentry of mountpoint */ |
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| 26 | struct dentry *mnt_root; /* root of the mounted tree */ |
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| 27 | struct super_block *mnt_sb; /* pointer to superblock */ |
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| 28 | struct list_head mnt_mounts; /* list of children, anchored here */ |
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| 29 | struct list_head mnt_child; /* and going through their mnt_child */ |
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| 30 | atomic_t mnt_count; |
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| 31 | int mnt_flags; |
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| 32 | char *mnt_devname; /* Name of device e.g. /dev/dsk/hda1 */ |
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| 33 | struct list_head mnt_list; |
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| 34 | }; |
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| 35 | |||
| 36 | static inline struct vfsmount *mntget(struct vfsmount *mnt) |
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| 37 | { |
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| 38 | if (mnt) |
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| 39 | atomic_inc(&mnt->mnt_count); |
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| 40 | return mnt; |
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| 41 | } |
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| 42 | |||
| 43 | extern void __mntput(struct vfsmount *mnt); |
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| 44 | |||
| 45 | static inline void mntput(struct vfsmount *mnt) |
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| 46 | { |
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| 47 | if (mnt) { |
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| 48 | if (atomic_dec_and_test(&mnt->mnt_count)) |
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| 49 | __mntput(mnt); |
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| 50 | } |
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| 51 | } |
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| 52 | |||
| 53 | extern void free_vfsmnt(struct vfsmount *mnt); |
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| 54 | extern struct vfsmount *alloc_vfsmnt(const char *name); |
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| 55 | extern struct vfsmount *do_kern_mount(const char *fstype, int flags, |
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| 56 | const char *name, void *data); |
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| 57 | extern spinlock_t vfsmount_lock; |
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| 58 | |||
| 59 | #endif |
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| 60 | #endif /* _LINUX_MOUNT_H */ |