Remove zfs_ctldir.[ch]

This code is used for snapshot and heavily leverages Solaris
functionality we do not want to reimplement.  These files have
been removed, including references to them, and will be replaced
by a zfs_snap.c/zpl_snap.c implementation which handles snapshots.

1 files changed, 29 insertions, 2 deletions

diff --git a/include/sys/zfs_vfsops.h b/include/sys/zfs_vfsops.h
index ec4097768..34a871587 100644
--- a/include/sys/zfs_vfsops.h
+++ b/include/sys/zfs_vfsops.h
@@ -67,7 +67,7 @@ struct zfsvfs {
 	krwlock_t	z_teardown_inactive_lock;
 	list_t		z_all_znodes;	/* all vnodes in the fs */
 	kmutex_t	z_znodes_lock;	/* lock for z_all_znodes */
-	vnode_t		*z_ctldir;	/* .zfs directory pointer */
+	struct inode	*z_ctldir;	/* .zfs directory inode */
 	boolean_t	z_show_ctldir;	/* expose .zfs in the root dir */
 	boolean_t	z_issnap;	/* true if this is a snapshot */
 	boolean_t	z_vscan;	/* virus scan on/off */
@@ -83,7 +83,34 @@ struct zfsvfs {
 	sa_attr_type_t	*z_attr_table;	/* SA attr mapping->id */
 #define	ZFS_OBJ_MTX_SZ	64
 	kmutex_t	z_hold_mtx[ZFS_OBJ_MTX_SZ];	/* znode hold locks */
-};
+} zfs_sb_t;
+
+#define	ZFS_SUPER_MAGIC	0x2fc12fc1
+
+
+/*
+ * Minimal snapshot helpers, the bulk of the Linux snapshot implementation
+ * lives in the zpl_snap.c file which is part of the zpl source.
+ */
+#define	ZFS_CTLDIR_NAME		".zfs"
+
+#define	zfs_has_ctldir(zdp)	\
+	((zdp)->z_id == ZTOZSB(zdp)->z_root && \
+	(ZTOZSB(zdp)->z_ctldir != NULL))
+#define	zfs_show_ctldir(zdp)	\
+	(zfs_has_ctldir(zdp) &&	\
+	(ZTOZSB(zdp)->z_show_ctldir))
+
+#define	ZFSCTL_INO_ROOT		0x1
+#define	ZFSCTL_INO_SNAPDIR	0x2
+#define	ZFSCTL_INO_SHARES	0x3
+
+/*
+ * Allow a maximum number of links.  While ZFS does not internally limit
+ * this most Linux filesystems do.  It's probably a good idea to limit
+ * this to a large value until it is validated that this is safe.
+ */
+#define ZFS_LINK_MAX		65536
 
 /*
  * Normal filesystems (those not under .zfs/snapshot) have a total