#include <linux/types.h>
#include <linux/list.h>
#include <linux/nodemask.h>
#include <linux/spinlock.h>
#include <linux/seqlock.h>
#include <linux/atomic.h>

Data Structures
struct	vfsmount

Macros
#define	MNT_NOSUID 0x01

#define	MNT_NODEV 0x02

#define	MNT_NOEXEC 0x04

#define	MNT_NOATIME 0x08

#define	MNT_NODIRATIME 0x10

#define	MNT_RELATIME 0x20

#define	MNT_READONLY 0x40 /* does the user want this to be r/o? */

#define	MNT_SHRINKABLE 0x100

#define	MNT_WRITE_HOLD 0x200

#define	MNT_SHARED 0x1000 /* if the vfsmount is a shared mount */

#define	MNT_UNBINDABLE 0x2000 /* if the vfsmount is a unbindable mount */

#define	MNT_SHARED_MASK (MNT_UNBINDABLE)

#define	MNT_PROPAGATION_MASK (MNT_SHARED \| MNT_UNBINDABLE)

#define	MNT_INTERNAL 0x4000

Functions
int	mnt_want_write (struct vfsmount *mnt)

int	mnt_want_write_file (struct file *file)

int	mnt_clone_write (struct vfsmount *mnt)

void	mnt_drop_write (struct vfsmount *mnt)

void	mnt_drop_write_file (struct file *file)

void	mntput (struct vfsmount *mnt)

struct vfsmount *	mntget (struct vfsmount *mnt)

void	mnt_pin (struct vfsmount *mnt)

void	mnt_unpin (struct vfsmount *mnt)

int	__mnt_is_readonly (struct vfsmount *mnt)

struct vfsmount *	vfs_kern_mount (struct file_system_type type, int flags, const char name, void *data)

void	mnt_set_expiry (struct vfsmount mnt, struct list_head expiry_list)

void	mark_mounts_for_expiry (struct list_head *mounts)

dev_t	name_to_dev_t (char *name)

Macro Definition Documentation

#define MNT_INTERNAL 0x4000

Definition at line 48 of file mount.h.

#define MNT_NOATIME 0x08

Definition at line 27 of file mount.h.

#define MNT_NODEV 0x02

Definition at line 25 of file mount.h.

#define MNT_NODIRATIME 0x10

Definition at line 28 of file mount.h.

#define MNT_NOEXEC 0x04

Definition at line 26 of file mount.h.

#define MNT_NOSUID 0x01

Definition at line 24 of file mount.h.

#define MNT_PROPAGATION_MASK (MNT_SHARED | MNT_UNBINDABLE)

Definition at line 45 of file mount.h.

#define MNT_READONLY 0x40 /* does the user want this to be r/o? */

Definition at line 30 of file mount.h.

#define MNT_RELATIME 0x20

Definition at line 29 of file mount.h.

#define MNT_SHARED 0x1000 /* if the vfsmount is a shared mount */

Definition at line 35 of file mount.h.

#define MNT_SHARED_MASK (MNT_UNBINDABLE)

Definition at line 44 of file mount.h.

#define MNT_SHRINKABLE 0x100

Definition at line 32 of file mount.h.

#define MNT_UNBINDABLE 0x2000 /* if the vfsmount is a unbindable mount */

Definition at line 36 of file mount.h.

#define MNT_WRITE_HOLD 0x200

Definition at line 33 of file mount.h.

Function Documentation

int __mnt_is_readonly ( struct vfsmount * mnt )

Definition at line 232 of file namespace.c.

void mark_mounts_for_expiry ( struct list_head * mounts )

Definition at line 1997 of file namespace.c.

int mnt_clone_write ( struct vfsmount * mnt )

mnt_clone_write - get write access to a mount : the mount on which to take a write

This is effectively like mnt_want_write, except it must only be used to take an extra write reference on a mountpoint that we already know has a write reference on it. This allows some optimisation.

After finished, mnt_drop_write must be called as usual to drop the reference.

Definition at line 364 of file namespace.c.

void mnt_drop_write ( struct vfsmount * mnt )

mnt_drop_write - give up write access to a mount : the mount on which to give up write access

Tells the low-level filesystem that we are done performing writes to it and also allows filesystem to be frozen again. Must be matched with mnt_want_write() call above.

Definition at line 435 of file namespace.c.

void mnt_drop_write_file ( struct file * file )

Definition at line 447 of file namespace.c.

void mnt_pin ( struct vfsmount * mnt )

Definition at line 916 of file namespace.c.

void mnt_set_expiry	(	struct vfsmount *	mnt,
		struct list_head *	expiry_list
	)

mnt_set_expiry - Put a mount on an expiration list : The mount to list. : The list to add the mount to.

Definition at line 1980 of file namespace.c.

void mnt_unpin ( struct vfsmount * mnt )

Definition at line 924 of file namespace.c.

int mnt_want_write ( struct vfsmount * m )

mnt_want_write - get write access to a mount : the mount on which to take a write

This tells the low-level filesystem that a write is about to be performed to it, and makes sure that writes are allowed (mount is read-write, filesystem is not frozen) before returning success. When the write operation is finished, mnt_drop_write() must be called. This is effectively a refcount.

Definition at line 340 of file namespace.c.

int mnt_want_write_file ( struct file * file )

Definition at line 400 of file namespace.c.

struct vfsmount* mntget ( struct vfsmount * mnt )

read

Definition at line 908 of file namespace.c.

void mntput ( struct vfsmount * mnt )

Definition at line 896 of file namespace.c.

dev_t name_to_dev_t ( char * name )

Definition at line 186 of file do_mounts.c.

struct vfsmount* vfs_kern_mount	(	struct file_system_type *	type,
		int	flags,
		const char *	name,
		void *	data
	)

read

Definition at line 744 of file namespace.c.

Data Structures

Macros

Functions

Macro Definition Documentation

Function Documentation