#define _LINUX_MOUNT_H
#ifdef __KERNEL__
+#include <linux/types.h>
#include <linux/list.h>
#include <linux/spinlock.h>
#include <asm/atomic.h>
-#define MNT_NOSUID 1
-#define MNT_NODEV 2
-#define MNT_NOEXEC 4
-#define MNT_RDONLY 8 /* MEF @ PlanetLab: bme patch */
-#define MNT_NOATIME 16 /* MEF @ PlanetLab: bme patch */
-#define MNT_NODIRATIME 32 /* MEF @ PlanetLab: bme patch */
-#define MNT_XID 256
+struct super_block;
+struct vfsmount;
+struct dentry;
+struct mnt_namespace;
-struct vfsmount
-{
+#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_RDONLY 0x40
+
+#define MNT_IS_RDONLY(m) ((m) && ((m)->mnt_flags & MNT_RDONLY))
+
+#define MNT_SHRINKABLE 0x100
+
+#define MNT_SHARED 0x1000 /* if the vfsmount is a shared mount */
+#define MNT_UNBINDABLE 0x2000 /* if the vfsmount is a unbindable mount */
+#define MNT_PNODE_MASK 0x3000 /* propogation flag mask */
+#define MNT_TAGID 0x8000
+
+struct vfsmount {
struct list_head mnt_hash;
struct vfsmount *mnt_parent; /* fs we are mounted on */
struct dentry *mnt_mountpoint; /* dentry of mountpoint */
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 */
- xid_t mnt_xid; /* xid tagging used for vfsmount */
+ struct list_head mnt_expire; /* link in fs-specific expiry list */
+ struct list_head mnt_share; /* circular list of shared mounts */
+ struct list_head mnt_slave_list;/* list of slave mounts */
+ struct list_head mnt_slave; /* slave list entry */
+ struct vfsmount *mnt_master; /* slave is on master->mnt_slave_list */
+ struct mnt_namespace *mnt_ns; /* containing namespace */
+ int mnt_pinned;
+ tag_t mnt_tag; /* tagging used for vfsmount */
};
-#define MNT_IS_RDONLY(m) ((m) && ((m)->mnt_flags & MNT_RDONLY))
-#define MNT_IS_NOATIME(m) ((m) && ((m)->mnt_flags & MNT_NOATIME))
-#define MNT_IS_NODIRATIME(m) ((m) && ((m)->mnt_flags & MNT_NODIRATIME))
-
static inline struct vfsmount *mntget(struct vfsmount *mnt)
{
if (mnt)
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);
- }
-}
+extern void mntput_no_expire(struct vfsmount *mnt);
+extern void mnt_pin(struct vfsmount *mnt);
+extern void mnt_unpin(struct vfsmount *mnt);
static inline void mntput(struct vfsmount *mnt)
{
if (mnt) {
mnt->mnt_expiry_mark = 0;
- _mntput(mnt);
+ mntput_no_expire(mnt);
}
}
extern struct vfsmount *do_kern_mount(const char *fstype, int flags,
const char *name, void *data);
+struct file_system_type;
+extern struct vfsmount *vfs_kern_mount(struct file_system_type *type,
+ 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 void shrink_submounts(struct vfsmount *mountpoint, struct list_head *mounts);
extern spinlock_t vfsmount_lock;
+extern dev_t name_to_dev_t(char *name);
#endif
#endif /* _LINUX_MOUNT_H */