Bring in the ext2fs work done by Aditya Sarawgi during and after Google Summer

of Code 2009:

- BSDL block and inode allocation policies for ext2fs. This involves the use
  FFS1 style block and inode allocation for ext2fs. Preallocation was removed
  since it was GPL'd.
- Make ext2fs MPSAFE by introducing locks to per-mount datastructures.
- Fixes for kern/122047 PR.
- Various small bugfixes.
- Move out of gnu/ directory.

Sponsored by:   Google Inc.
Submitted by:	Aditya Sarawgi <sarawgi.aditya AT SPAMFREE gmail DOT com>

1 files changed, 93 insertions, 0 deletions

diff --git a/sys/fs/ext2fs/ext2_extern.h b/sys/fs/ext2fs/ext2_extern.h
new file mode 100644
index 0000000..60905cb
--- /dev/null
+++ b/sys/fs/ext2fs/ext2_extern.h
@@ -0,0 +1,93 @@
+/*-
+ *  modified for EXT2FS support in Lites 1.1
+ *
+ *  Aug 1995, Godmar Back (gback@cs.utah.edu)
+ *  University of Utah, Department of Computer Science
+ */
+/*-
+ * Copyright (c) 1991, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ *	@(#)ffs_extern.h	8.3 (Berkeley) 4/16/94
+ * $FreeBSD$
+ */
+
+#ifndef _FS_EXT2FS_EXT2_EXTERN_H_
+#define	_FS_EXT2FS_EXT2_EXTERN_H_
+
+struct ext2fs_dinode;
+struct indir;
+struct inode;
+struct mount;
+struct vfsconf;
+struct vnode;
+
+int	ext2_alloc(struct inode *,
+	    int32_t, int32_t, int, struct ucred *, int32_t *);
+int	ext2_balloc(struct inode *,
+	    int32_t, int, struct ucred *, struct buf **, int);
+int	ext2_blkatoff(struct vnode *, off_t, char **, struct buf **);
+void	ext2_blkfree(struct inode *, int32_t, long);
+int32_t	ext2_blkpref(struct inode *, int32_t, int, int32_t *, int32_t);
+int	ext2_bmap(struct vop_bmap_args *);
+int	ext2_bmaparray(struct vnode *, int32_t, int32_t *, int *, int *);
+void	ext2_dirbad(struct inode *ip, doff_t offset, char *how);
+void	ext2_ei2i(struct ext2fs_dinode *, struct inode *);
+int	ext2_getlbns(struct vnode *, int32_t, struct indir *, int *);
+void	ext2_i2ei(struct inode *, struct ext2fs_dinode *);
+void	ext2_itimes(struct vnode *vp);
+int	ext2_reallocblks(struct vop_reallocblks_args *);
+int	ext2_reclaim(struct vop_reclaim_args *);
+void	ext2_setblock(struct m_ext2fs *, u_char *, int32_t);
+int	ext2_truncate(struct vnode *, off_t, int, struct ucred *, struct thread *);
+int	ext2_update(struct vnode *, int);
+int	ext2_valloc(struct vnode *, int, struct ucred *, struct vnode **);
+int	ext2_vfree(struct vnode *, ino_t, int);
+int	ext2_vinit(struct mount *, struct vop_vector *, struct vnode **vpp);
+int 	ext2_lookup(struct vop_cachedlookup_args *);
+int 	ext2_readdir(struct vop_readdir_args *);
+void	ext2_print_inode(struct inode *);
+int	ext2_direnter(struct inode *, 
+		struct vnode *, struct componentname *);
+int	ext2_dirremove(struct vnode *, struct componentname *);
+int	ext2_dirrewrite(struct inode *,
+		struct inode *, struct componentname *);
+int	ext2_dirempty(struct inode *, ino_t, struct ucred *);
+int	ext2_checkpath(struct inode *, struct inode *, struct ucred *);
+int	cg_has_sb(int i);
+int	ext2_inactive(struct vop_inactive_args *);
+
+/* Flags to low-level allocation routines. */
+#define B_CLRBUF	0x01	/* Request allocated buffer be cleared. */
+#define B_SYNC		0x02	/* Do all allocations synchronously. */
+#define B_METAONLY	0x04	/* Return indirect block buffer. */
+#define B_NOWAIT	0x08	/* do not sleep to await lock */
+
+extern struct vop_vector ext2_vnodeops;
+extern struct vop_vector ext2_fifoops;
+
+#endif /* !_FS_EXT2FS_EXT2_EXTERN_H_ */