X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=include%2Flinux%2Fmount.h;h=6d3047d8c91c877b9243a5093557ef77c5e61774;hb=b11115c15351faba978ce1b9e75068e77f6ef48d;hp=8eadd3b658990678f2b4672a0fcedce7f7a587be;hpb=07b20889e3052c7e77d6a6a54e7e83446eb1ba84;p=safe%2Fjmp%2Flinux-2.6

diff --git a/include/linux/mount.h b/include/linux/mount.h
index 8eadd3b..6d3047d 100644
--- a/include/linux/mount.h
+++ b/include/linux/mount.h
@@ -17,10 +17,23 @@
 #include <linux/spinlock.h>
 #include <asm/atomic.h>
 
+struct super_block;
+struct vfsmount;
+struct dentry;
+struct mnt_namespace;
+
 #define MNT_NOSUID	0x01
 #define MNT_NODEV	0x02
 #define MNT_NOEXEC	0x04
-#define MNT_PNODE_MASK	0x30	/* propogation flag mask */
+#define MNT_NOATIME	0x08
+#define MNT_NODIRATIME	0x10
+#define MNT_RELATIME	0x20
+
+#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	/* propagation flag mask */
 
 struct vfsmount {
 	struct list_head mnt_hash;
@@ -30,13 +43,23 @@ struct vfsmount {
 	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 */
+	/* 4 bytes hole on 64bits arches */
 	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 namespace *mnt_namespace; /* containing namespace */
+	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 */
+	/*
+	 * We put mnt_count & mnt_expiry_mark at the end of struct vfsmount
+	 * to let these frequently modified fields in a separate cache line
+	 * (so that reads of mnt_flags wont ping-pong on SMP machines)
+	 */
+	atomic_t mnt_count;
+	int mnt_expiry_mark;		/* true if marked for expiry */
 	int mnt_pinned;
 };
 
@@ -64,12 +87,18 @@ 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 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);