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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/linux/mount.h | |
download | lwn-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz lwn-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'include/linux/mount.h')
-rw-r--r-- | include/linux/mount.h | 81 |
1 files changed, 81 insertions, 0 deletions
diff --git a/include/linux/mount.h b/include/linux/mount.h new file mode 100644 index 000000000000..8b8d3b9beefd --- /dev/null +++ b/include/linux/mount.h @@ -0,0 +1,81 @@ +/* + * + * Definitions for mount interface. This describes the in the kernel build + * linkedlist with mounted filesystems. + * + * Author: Marco van Wieringen <mvw@planets.elm.net> + * + * Version: $Id: mount.h,v 2.0 1996/11/17 16:48:14 mvw Exp mvw $ + * + */ +#ifndef _LINUX_MOUNT_H +#define _LINUX_MOUNT_H +#ifdef __KERNEL__ + +#include <linux/list.h> +#include <linux/spinlock.h> +#include <asm/atomic.h> + +#define MNT_NOSUID 1 +#define MNT_NODEV 2 +#define MNT_NOEXEC 4 + +struct vfsmount +{ + struct list_head mnt_hash; + struct vfsmount *mnt_parent; /* fs we are mounted on */ + struct dentry *mnt_mountpoint; /* dentry of mountpoint */ + struct dentry *mnt_root; /* root of the mounted tree */ + struct super_block *mnt_sb; /* pointer to superblock */ + struct list_head mnt_mounts; /* list of children, anchored here */ + struct list_head mnt_child; /* and going through their mnt_child */ + atomic_t mnt_count; + int mnt_flags; + int mnt_expiry_mark; /* true if marked for expiry */ + char *mnt_devname; /* Name of device e.g. /dev/dsk/hda1 */ + struct list_head mnt_list; + struct list_head mnt_fslink; /* link in fs-specific expiry list */ + struct namespace *mnt_namespace; /* containing namespace */ +}; + +static inline struct vfsmount *mntget(struct vfsmount *mnt) +{ + if (mnt) + atomic_inc(&mnt->mnt_count); + return mnt; +} + +extern void __mntput(struct vfsmount *mnt); + +static inline void _mntput(struct vfsmount *mnt) +{ + if (mnt) { + if (atomic_dec_and_test(&mnt->mnt_count)) + __mntput(mnt); + } +} + +static inline void mntput(struct vfsmount *mnt) +{ + if (mnt) { + mnt->mnt_expiry_mark = 0; + _mntput(mnt); + } +} + +extern void free_vfsmnt(struct vfsmount *mnt); +extern struct vfsmount *alloc_vfsmnt(const char *name); +extern struct vfsmount *do_kern_mount(const char *fstype, int flags, + const char *name, void *data); + +struct nameidata; + +extern int do_add_mount(struct vfsmount *newmnt, struct nameidata *nd, + int mnt_flags, struct list_head *fslist); + +extern void mark_mounts_for_expiry(struct list_head *mounts); + +extern spinlock_t vfsmount_lock; + +#endif +#endif /* _LINUX_MOUNT_H */ |