patch-2.4.25 linux-2.4.25/fs/xfs/xfs_extfree_item.h

• Lines: 124
• Date: 2004-02-18 05:36:32.000000000 -0800
• Orig file: linux-2.4.24/fs/xfs/xfs_extfree_item.h
• Orig date: 1969-12-31 16:00:00.000000000 -0800

diff -urN linux-2.4.24/fs/xfs/xfs_extfree_item.h linux-2.4.25/fs/xfs/xfs_extfree_item.h
@@ -0,0 +1,123 @@
+/*
+ * Copyright (c) 2000 Silicon Graphics, Inc.  All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Further, this software is distributed without any warranty that it is
+ * free of the rightful claim of any third person regarding infringement
+ * or the like.  Any license provided herein, whether implied or
+ * otherwise, applies only to this software file.  Patent licenses, if
+ * any, provided herein do not apply to combinations of this program with
+ * other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write the Free Software Foundation, Inc., 59
+ * Temple Place - Suite 330, Boston MA 02111-1307, USA.
+ *
+ * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
+ * Mountain View, CA  94043, or:
+ *
+ * http://www.sgi.com
+ *
+ * For further information regarding this notice, see:
+ *
+ * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
+ */
+#ifndef	__XFS_EXTFREE_ITEM_H__
+#define	__XFS_EXTFREE_ITEM_H__
+
+struct xfs_mount;
+struct kmem_zone;
+
+typedef struct xfs_extent {
+	xfs_dfsbno_t	ext_start;
+	xfs_extlen_t	ext_len;
+} xfs_extent_t;
+
+/*
+ * This is the structure used to lay out an efi log item in the
+ * log.  The efi_extents field is a variable size array whose
+ * size is given by efi_nextents.
+ */
+typedef struct xfs_efi_log_format {
+	unsigned short		efi_type;	/* efi log item type */
+	unsigned short		efi_size;	/* size of this item */
+	uint			efi_nextents;	/* # extents to free */
+	__uint64_t		efi_id;		/* efi identifier */
+	xfs_extent_t		efi_extents[1];	/* array of extents to free */
+} xfs_efi_log_format_t;
+
+/*
+ * This is the structure used to lay out an efd log item in the
+ * log.  The efd_extents array is a variable size array whose
+ * size is given by efd_nextents;
+ */
+typedef struct xfs_efd_log_format {
+	unsigned short		efd_type;	/* efd log item type */
+	unsigned short		efd_size;	/* size of this item */
+	uint			efd_nextents;	/* # of extents freed */
+	__uint64_t		efd_efi_id;	/* id of corresponding efi */
+	xfs_extent_t		efd_extents[1];	/* array of extents freed */
+} xfs_efd_log_format_t;
+
+
+#ifdef __KERNEL__
+
+/*
+ * Max number of extents in fast allocation path.
+ */
+#define	XFS_EFI_MAX_FAST_EXTENTS	16
+
+/*
+ * Define EFI flags.
+ */
+#define	XFS_EFI_RECOVERED	0x1
+#define	XFS_EFI_COMMITTED	0x2
+#define	XFS_EFI_CANCELED	0x4
+
+/*
+ * This is the "extent free intention" log item.  It is used
+ * to log the fact that some extents need to be free.  It is
+ * used in conjunction with the "extent free done" log item
+ * described below.
+ */
+typedef struct xfs_efi_log_item {
+	xfs_log_item_t		efi_item;
+	uint			efi_flags;	/* misc flags */
+	uint			efi_next_extent;
+	xfs_efi_log_format_t	efi_format;
+} xfs_efi_log_item_t;
+
+/*
+ * This is the "extent free done" log item.  It is used to log
+ * the fact that some extents earlier mentioned in an efi item
+ * have been freed.
+ */
+typedef struct xfs_efd_log_item {
+	xfs_log_item_t		efd_item;
+	xfs_efi_log_item_t	*efd_efip;
+	uint			efd_next_extent;
+	xfs_efd_log_format_t	efd_format;
+} xfs_efd_log_item_t;
+
+/*
+ * Max number of extents in fast allocation path.
+ */
+#define	XFS_EFD_MAX_FAST_EXTENTS	16
+
+extern struct kmem_zone	*xfs_efi_zone;
+extern struct kmem_zone	*xfs_efd_zone;
+
+xfs_efi_log_item_t	*xfs_efi_init(struct xfs_mount *, uint);
+xfs_efd_log_item_t	*xfs_efd_init(struct xfs_mount *, xfs_efi_log_item_t *,
+				      uint);
+
+#endif	/* __KERNEL__ */
+
+#endif	/* __XFS_EXTFREE_ITEM_H__ */