7 files changed, 31 insertions, 16 deletions
diff --git a/include/asm-ia64/page.h b/include/asm-ia64/page.h
index ef436b9d06a..9d41548b7fe 100644
--- a/include/asm-ia64/page.h
+++ b/include/asm-ia64/page.h
@@ -120,6 +120,7 @@ extern unsigned long max_low_pfn;
 
 #define page_to_phys(page)	(page_to_pfn(page) << PAGE_SHIFT)
 #define virt_to_page(kaddr)	pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
+#define pfn_to_kaddr(pfn)	__va((pfn) << PAGE_SHIFT)
 
 typedef union ia64_va {
 	struct {
diff --git a/include/linux/acct.h b/include/linux/acct.h
index 19f70462b3b..93c5b3cdf95 100644
--- a/include/linux/acct.h
+++ b/include/linux/acct.h
@@ -117,12 +117,15 @@ struct acct_v3
 #include <linux/config.h>
 
 #ifdef CONFIG_BSD_PROCESS_ACCT
+struct vfsmount;
 struct super_block;
+extern void acct_auto_close_mnt(struct vfsmount *m);
 extern void acct_auto_close(struct super_block *sb);
 extern void acct_process(long exitcode);
 extern void acct_update_integrals(struct task_struct *tsk);
 extern void acct_clear_integrals(struct task_struct *tsk);
 #else
+#define acct_auto_close_mnt(x)	do { } while (0)
 #define acct_auto_close(x)	do { } while (0)
 #define acct_process(x)		do { } while (0)
 #define acct_update_integrals(x)		do { } while (0)
diff --git a/include/linux/dcache.h b/include/linux/dcache.h
index ab04b4f9b0d..46a2ba61759 100644
--- a/include/linux/dcache.h
+++ b/include/linux/dcache.h
@@ -329,6 +329,7 @@ static inline int d_mountpoint(struct dentry *dentry)
 }
 
 extern struct vfsmount *lookup_mnt(struct vfsmount *, struct dentry *);
+extern struct vfsmount *__lookup_mnt(struct vfsmount *, struct dentry *, int);
 extern struct dentry *lookup_create(struct nameidata *nd, int is_dir);
 
 extern int sysctl_vfs_cache_pressure;
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 9a593ef262e..1b5f502a4b8 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -104,6 +104,10 @@ extern int dir_notify_enable;
 #define MS_MOVE		8192
 #define MS_REC		16384
 #define MS_VERBOSE	32768
+#define MS_UNBINDABLE	(1<<17)	/* change to unbindable */
+#define MS_PRIVATE	(1<<18)	/* change to private */
+#define MS_SLAVE	(1<<19)	/* change to slave */
+#define MS_SHARED	(1<<20)	/* change to shared */
 #define MS_POSIXACL	(1<<16)	/* VFS does not apply the umask */
 #define MS_ACTIVE	(1<<30)
 #define MS_NOUSER	(1<<31)
@@ -1249,7 +1253,12 @@ extern int unregister_filesystem(struct file_system_type *);
 extern struct vfsmount *kern_mount(struct file_system_type *);
 extern int may_umount_tree(struct vfsmount *);
 extern int may_umount(struct vfsmount *);
+extern void umount_tree(struct vfsmount *, int, struct list_head *);
+extern void release_mounts(struct list_head *);
 extern long do_mount(char *, char *, char *, unsigned long, void *);
+extern struct vfsmount *copy_tree(struct vfsmount *, struct dentry *, int);
+extern void mnt_set_mountpoint(struct vfsmount *, struct dentry *,
+				  struct vfsmount *);
 
 extern int vfs_statfs(struct super_block *, struct kstatfs *);
 
diff --git a/include/linux/mount.h b/include/linux/mount.h
index f8f39937e30..dd4e83eba93 100644
--- a/include/linux/mount.h
+++ b/include/linux/mount.h
@@ -17,12 +17,14 @@
 #include <linux/spinlock.h>
 #include <asm/atomic.h>
 
-#define MNT_NOSUID	1
-#define MNT_NODEV	2
-#define MNT_NOEXEC	4
+#define MNT_NOSUID	0x01
+#define MNT_NODEV	0x02
+#define MNT_NOEXEC	0x04
+#define MNT_SHARED	0x10	/* if the vfsmount is a shared mount */
+#define MNT_UNBINDABLE	0x20	/* if the vfsmount is a unbindable mount */
+#define MNT_PNODE_MASK	0x30	/* propogation flag mask */
 
-struct vfsmount
-{
+struct vfsmount {
 	struct list_head mnt_hash;
 	struct vfsmount *mnt_parent;	/* fs we are mounted on */
 	struct dentry *mnt_mountpoint;	/* dentry of mountpoint */
@@ -36,7 +38,12 @@ struct vfsmount
 	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 */
+	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 namespace *mnt_namespace; /* containing namespace */
+	int mnt_pinned;
 };
 
 static inline struct vfsmount *mntget(struct vfsmount *mnt)
@@ -46,15 +53,9 @@ static inline struct vfsmount *mntget(struct vfsmount *mnt)
 	return mnt;
 }
 
-extern void __mntput(struct vfsmount *mnt);
-
-static inline void mntput_no_expire(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)
 {
diff --git a/include/linux/namespace.h b/include/linux/namespace.h
index 0e5a86f13b2..6731977c4c1 100644
--- a/include/linux/namespace.h
+++ b/include/linux/namespace.h
@@ -9,7 +9,8 @@ struct namespace {
 	atomic_t		count;
 	struct vfsmount *	root;
 	struct list_head	list;
-	struct rw_semaphore	sem;
+	wait_queue_head_t poll;
+	int event;
 };
 
 extern int copy_namespace(int, struct task_struct *);
diff --git a/include/linux/quota.h b/include/linux/quota.h
index 700ead45084..f33aeb22c26 100644
--- a/include/linux/quota.h
+++ b/include/linux/quota.h
@@ -289,7 +289,6 @@ struct quota_info {
 	struct semaphore dqonoff_sem;		/* Serialize quotaon & quotaoff */
 	struct rw_semaphore dqptr_sem;		/* serialize ops using quota_info struct, pointers from inode to dquots */
 	struct inode *files[MAXQUOTAS];		/* inodes of quotafiles */
-	struct vfsmount *mnt[MAXQUOTAS];	/* mountpoint entries of filesystems with quota files */
 	struct mem_dqinfo info[MAXQUOTAS];	/* Information for each quota type */
 	struct quota_format_ops *ops[MAXQUOTAS];	/* Operations for each type */
 };