Move rtems/freebsd to freebsd and contrib to freebsd/contrib

1 files changed, 131 insertions, 0 deletions

diff --git a/freebsd/sys/bufobj.h b/freebsd/sys/bufobj.h
new file mode 100644
index 00000000..8cc459e9
--- /dev/null
+++ b/freebsd/sys/bufobj.h
@@ -0,0 +1,131 @@
+/*-
+ * Copyright (c) 2004 Poul-Henning Kamp
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+ *
+ * $FreeBSD$
+ */
+
+/*
+ * Architectural notes:
+ *
+ * bufobj is a new object which is what buffers hang from in the buffer
+ * cache.
+ *
+ * This used to be vnodes, but we need non-vnode code to be able
+ * to use the buffer cache as well, specifically geom classes like gbde,
+ * raid3 and raid5.
+ *
+ * All vnodes will contain a bufobj initially, but down the road we may
+ * want to only allocate bufobjs when they are needed.  There could be a
+ * large number of vnodes in the system which wouldn't need a bufobj during
+ * their lifetime.
+ *
+ * The exact relationship to the vmobject is not determined at this point,
+ * it may in fact be that we find them to be two sides of the same object 
+ * once things starts to crystalize.
+ */
+
+#ifndef _SYS_BUFOBJ_HH_
+#define _SYS_BUFOBJ_HH_
+
+#if defined(_KERNEL) || defined(_KVM_VNODE)
+
+#include <rtems/freebsd/sys/queue.h>
+#include <rtems/freebsd/sys/_lock.h>
+#include <rtems/freebsd/sys/_mutex.h>
+
+struct bufobj;
+struct buf_ops;
+
+extern struct buf_ops buf_ops_bio;
+
+TAILQ_HEAD(buflists, buf);
+
+/* A Buffer splay list */
+struct bufv {
+	struct buflists	bv_hd;		/* Sorted blocklist */
+	struct buf	*bv_root;	/* Buf splay tree */
+	int		bv_cnt;		/* Number of buffers */
+};
+
+typedef void b_strategy_t(struct bufobj *, struct buf *);
+typedef int b_write_t(struct buf *);
+typedef int b_sync_t(struct bufobj *, int waitfor);
+typedef void b_bdflush_t(struct bufobj *, struct buf *);
+
+struct buf_ops {
+	char		*bop_name;
+	b_write_t	*bop_write;
+	b_strategy_t	*bop_strategy;
+	b_sync_t	*bop_sync;
+	b_bdflush_t	*bop_bdflush;
+};
+
+#define BO_STRATEGY(bo, bp)	((bo)->bo_ops->bop_strategy((bo), (bp)))
+#define BO_SYNC(bo, w)		((bo)->bo_ops->bop_sync((bo), (w)))
+#define BO_WRITE(bo, bp)	((bo)->bo_ops->bop_write((bp)))
+#define BO_BDFLUSH(bo, bp)	((bo)->bo_ops->bop_bdflush((bo), (bp)))
+
+struct bufobj {
+	struct mtx	bo_mtx;		/* Mutex which protects "i" things */
+	struct bufv	bo_clean;	/* i Clean buffers */
+	struct bufv	bo_dirty;	/* i Dirty buffers */
+	long		bo_numoutput;	/* i Writes in progress */
+	u_int		bo_flag;	/* i Flags */
+	struct buf_ops	*bo_ops;	/* - Buffer operations */
+	int		bo_bsize;	/* - Block size for i/o */
+	struct vm_object *bo_object;	/* v Place to store VM object */
+	LIST_ENTRY(bufobj) bo_synclist;	/* S dirty vnode list */
+	void		*bo_private;	/* private pointer */
+	struct vnode	*__bo_vnode;	/*
+					 * XXX: This vnode pointer is here
+					 * XXX: only to keep the syncer working
+					 * XXX: for now.
+					 */
+};
+
+/*
+ * XXX BO_ONWORKLST could be replaced with a check for NULL list elements
+ * in v_synclist.
+ */
+#define	BO_ONWORKLST	(1 << 0)	/* On syncer work-list */
+#define	BO_WWAIT	(1 << 1)	/* Wait for output to complete */
+#define	BO_NEEDSGIANT	(1 << 2)	/* Require giant for child buffers. */
+
+#define	BO_MTX(bo)		(&(bo)->bo_mtx)
+#define	BO_LOCK(bo)		mtx_lock(BO_MTX((bo)))
+#define	BO_UNLOCK(bo)		mtx_unlock(BO_MTX((bo)))
+#define	ASSERT_BO_LOCKED(bo)	mtx_assert(BO_MTX((bo)), MA_OWNED)
+#define	ASSERT_BO_UNLOCKED(bo)	mtx_assert(BO_MTX((bo)), MA_NOTOWNED)
+
+void bufobj_wdrop(struct bufobj *bo);
+void bufobj_wref(struct bufobj *bo);
+void bufobj_wrefl(struct bufobj *bo);
+int bufobj_invalbuf(struct bufobj *bo, int flags, int slpflag, int slptimeo);
+int bufobj_wwait(struct bufobj *bo, int slpflag, int timeo);
+int bufsync(struct bufobj *bo, int waitfor);
+void bufbdflush(struct bufobj *bo, struct buf *bp);
+
+#endif /* defined(_KERNEL) || defined(_KVM_VNODE) */
+#endif /* _SYS_BUFOBJ_HH_ */