netfilter: nf_conntrack: fix hash resizing with namespaces

[safe/jmp/linux-2.6] / include / linux / mount.h

diff --git a/include/linux/mount.h b/include/linux/mount.h
index 8c8e943..5d52753 100644 (file)
--- a/include/linux/mount.h
+++ b/include/linux/mount.h
@@ -5,12 +5,9 @@
  *
  * 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/types.h>
 #include <linux/list.h>
@@ -29,9 +26,11 @@ struct mnt_namespace;
 #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_STRICTATIME 0x80
 
 #define MNT_SHRINKABLE 0x100
-#define MNT_IMBALANCED_WRITE_COUNT     0x200 /* just for debugging */
+#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 */
@@ -47,7 +46,7 @@ struct vfsmount {
        struct list_head mnt_child;     /* and going through their mnt_child */
        int mnt_flags;
        /* 4 bytes hole on 64bits arches */
-       char *mnt_devname;              /* Name of device e.g. /dev/dsk/hda1 */
+       const char *mnt_devname;        /* Name of device e.g. /dev/dsk/hda1 */
        struct list_head mnt_list;
        struct list_head mnt_expire;    /* link in fs-specific expiry list */
        struct list_head mnt_share;     /* circular list of shared mounts */
@@ -55,6 +54,8 @@ struct vfsmount {
        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_id;                     /* mount identifier */
+       int mnt_group_id;               /* peer group identifier */
        /*
         * We put mnt_count & mnt_expiry_mark at the end of struct vfsmount
         * to let these frequently modified fields in a separate cache line
@@ -64,13 +65,22 @@ struct vfsmount {
        int mnt_expiry_mark;            /* true if marked for expiry */
        int mnt_pinned;
        int mnt_ghosts;
-       /*
-        * This value is not stable unless all of the mnt_writers[] spinlocks
-        * are held, and all mnt_writer[]s on this mount have 0 as their ->count
-        */
-       atomic_t __mnt_writers;
+#ifdef CONFIG_SMP
+       int *mnt_writers;
+#else
+       int mnt_writers;
+#endif
 };
 
+static inline int *get_mnt_writers_ptr(struct vfsmount *mnt)
+{
+#ifdef CONFIG_SMP
+       return mnt->mnt_writers;
+#else
+       return &mnt->mnt_writers;
+#endif
+}
+
 static inline struct vfsmount *mntget(struct vfsmount *mnt)
 {
        if (mnt)
@@ -78,7 +88,11 @@ static inline struct vfsmount *mntget(struct vfsmount *mnt)
        return mnt;
 }
 
+struct file; /* forward dec */
+
 extern int mnt_want_write(struct vfsmount *mnt);
+extern int mnt_want_write_file(struct file *file);
+extern int mnt_clone_write(struct vfsmount *mnt);
 extern void mnt_drop_write(struct vfsmount *mnt);
 extern void mntput_no_expire(struct vfsmount *mnt);
 extern void mnt_pin(struct vfsmount *mnt);
@@ -93,8 +107,6 @@ static inline void mntput(struct vfsmount *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);
 
@@ -105,7 +117,8 @@ extern struct vfsmount *vfs_kern_mount(struct file_system_type *type,
 
 struct nameidata;
 
-extern int do_add_mount(struct vfsmount *newmnt, struct nameidata *nd,
+struct path;
+extern int do_add_mount(struct vfsmount *newmnt, struct path *path,
                        int mnt_flags, struct list_head *fslist);
 
 extern void mark_mounts_for_expiry(struct list_head *mounts);
@@ -113,5 +126,4 @@ extern void mark_mounts_for_expiry(struct list_head *mounts);
 extern spinlock_t vfsmount_lock;
 extern dev_t name_to_dev_t(char *name);
 
-#endif
 #endif /* _LINUX_MOUNT_H */