Add Hooks for Linux File Operations

The Linux specific file operations have all been located in the
file zpl_file.c.  These functions primarily rely on the reworked
zfs_* functions to do their job.  They are also responsible for
converting the possible Solaris style error codes to negative
Linux errors.

This first zpl_* commit also includes a common zpl.h header with
minimal entries to register the Linux specific hooks.  In also
adds all the new zpl_* file to the Makefile.in.  This is not a
standalone commit, you required the following zpl_* commits.

include/sys/Makefile.am

@@ -75,6 +75,7 @@ KERNEL_H = \
 	$(top_srcdir)/include/sys/blkdev.h \
 	$(top_srcdir)/include/sys/zfs_ioctl.h \
 	$(top_srcdir)/include/sys/zfs_onexit.h \
+	${top_srcdir}/include/sys/zpl.h \
 	$(top_srcdir)/include/sys/zvol.h
 
 USER_H =

include/sys/Makefile.in

@@ -163,6 +163,7 @@ am__kernel_HEADERS_DIST = $(top_srcdir)/include/sys/arc.h \
 	$(top_srcdir)/include/sys/blkdev.h \
 	$(top_srcdir)/include/sys/zfs_ioctl.h \
 	$(top_srcdir)/include/sys/zfs_onexit.h \
+	${top_srcdir}/include/sys/zpl.h \
 	$(top_srcdir)/include/sys/zvol.h
 am__vpath_adj_setup = srcdirstrip=`echo "$(srcdir)" | sed 's|.|.|g'`;
 am__vpath_adj = case $$p in \
@@ -531,6 +532,7 @@ KERNEL_H = \
 	$(top_srcdir)/include/sys/blkdev.h \
 	$(top_srcdir)/include/sys/zfs_ioctl.h \
 	$(top_srcdir)/include/sys/zfs_onexit.h \
+	${top_srcdir}/include/sys/zpl.h \
 	$(top_srcdir)/include/sys/zvol.h
 
 USER_H = 

include/sys/zpl.h

@@ -0,0 +1,63 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2011, Lawrence Livermore National Security, LLC.
+ */
+
+#ifndef	_SYS_ZPL_H
+#define	_SYS_ZPL_H
+
+#include <sys/vfs.h>
+
+/* zpl_inode.c */
+extern const struct inode_operations zpl_inode_operations;
+extern const struct inode_operations zpl_dir_inode_operations;
+extern const struct inode_operations zpl_symlink_inode_operations;
+extern const struct inode_operations zpl_special_inode_operations;
+
+/* zpl_file.c */
+extern ssize_t zpl_read_common(struct inode *ip, const char *buf,
+    size_t len, loff_t pos, uio_seg_t segment, int flags, cred_t *cr);
+extern ssize_t zpl_write_common(struct inode *ip, const char *buf,
+    size_t len, loff_t pos, uio_seg_t segment, int flags, cred_t *cr);
+
+extern const struct address_space_operations zpl_address_space_operations;
+extern const struct file_operations zpl_file_operations;
+extern const struct file_operations zpl_dir_file_operations;
+
+/* zpl_super.c */
+typedef struct zpl_mount_data {
+	const char *z_osname;	/* Dataset name */
+	void *z_data;		/* Mount options string */
+	struct vfsmount *z_vfs;	/* VFS mount point */
+} zpl_mount_data_t;
+
+extern const struct super_operations zpl_super_operations;
+/* extern const struct export_operations zpl_export_operations; */
+extern struct file_system_type zpl_fs_type;
+
+/* zpl_xattr.c */
+extern ssize_t zpl_xattr_list(struct dentry *dentry, char *buf, size_t size);
+extern int zpl_xattr_security_init(struct inode *ip, struct inode *dip);
+
+extern struct xattr_handler *zpl_xattr_handlers[];
+
+#endif	/* _SYS_ZPL_H */