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

• Lines: 155
• Date: 2004-02-18 05:36:32.000000000 -0800
• Orig file: linux-2.4.24/fs/xfs/xfs_rw.h
• Orig date: 1969-12-31 16:00:00.000000000 -0800

diff -urN linux-2.4.24/fs/xfs/xfs_rw.h linux-2.4.25/fs/xfs/xfs_rw.h
@@ -0,0 +1,154 @@
+/*
+ * Copyright (c) 2000-2003 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_RW_H__
+#define	__XFS_RW_H__
+
+struct xfs_buf;
+struct xfs_inode;
+struct xfs_mount;
+
+/*
+ * Maximum count of bmaps used by read and write paths.
+ */
+#define	XFS_MAX_RW_NBMAPS	4
+
+/*
+ * Counts of readahead buffers to use based on physical memory size.
+ * None of these should be more than XFS_MAX_RW_NBMAPS.
+ */
+#define	XFS_RW_NREADAHEAD_16MB	2
+#define	XFS_RW_NREADAHEAD_32MB	3
+#define	XFS_RW_NREADAHEAD_K32	4
+#define	XFS_RW_NREADAHEAD_K64	4
+
+/*
+ * Maximum size of a buffer that we\'ll map.  Making this
+ * too big will degrade performance due to the number of
+ * pages which need to be gathered.  Making it too small
+ * will prevent us from doing large I/O\'s to hardware that
+ * needs it.
+ *
+ * This is currently set to 512 KB.
+ */
+#define	XFS_MAX_BMAP_LEN_BB	1024
+#define	XFS_MAX_BMAP_LEN_BYTES	524288
+
+/*
+ * Convert the given file system block to a disk block.
+ * We have to treat it differently based on whether the
+ * file is a real time file or not, because the bmap code
+ * does.
+ */
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_FSB_TO_DB)
+xfs_daddr_t xfs_fsb_to_db(struct xfs_inode *ip, xfs_fsblock_t fsb);
+#define	XFS_FSB_TO_DB(ip,fsb)	xfs_fsb_to_db(ip,fsb)
+#else
+#define	XFS_FSB_TO_DB(ip,fsb) \
+		(((ip)->i_d.di_flags & XFS_DIFLAG_REALTIME) ? \
+		 (xfs_daddr_t)XFS_FSB_TO_BB((ip)->i_mount, (fsb)) : \
+		 XFS_FSB_TO_DADDR((ip)->i_mount, (fsb)))
+#endif
+
+#define XFS_FSB_TO_DB_IO(io,fsb) \
+		(((io)->io_flags & XFS_IOCORE_RT) ? \
+		 XFS_FSB_TO_BB((io)->io_mount, (fsb)) : \
+		 XFS_FSB_TO_DADDR((io)->io_mount, (fsb)))
+
+/*
+ * Prototypes for functions in xfs_rw.c.
+ */
+
+int
+xfs_write_clear_setuid(
+	struct xfs_inode	*ip);
+
+int
+xfs_bwrite(
+	struct xfs_mount	*mp,
+	struct xfs_buf		*bp);
+
+int
+xfs_bioerror(
+	struct xfs_buf		*b);
+
+int
+xfs_bioerror_relse(
+	struct xfs_buf		*b);
+
+int
+xfs_read_buf(
+	struct xfs_mount	*mp,
+	xfs_buftarg_t		*target,
+	xfs_daddr_t		blkno,
+	int			len,
+	uint			flags,
+	struct xfs_buf		**bpp);
+
+void
+xfs_ioerror_alert(
+	char			*func,
+	struct xfs_mount	*mp,
+	xfs_buf_t		*bp,
+	xfs_daddr_t		blkno);
+
+
+/*
+ * Prototypes for functions in xfs_vnodeops.c.
+ */
+
+int
+xfs_rwlock(
+	bhv_desc_t		*bdp,
+	vrwlock_t		write_lock);
+
+void
+xfs_rwunlock(
+	bhv_desc_t		*bdp,
+	vrwlock_t		write_lock);
+
+int
+xfs_change_file_space(
+	bhv_desc_t		*bdp,
+	int			cmd,
+	xfs_flock64_t		*bf,
+	xfs_off_t		offset,
+	cred_t			*credp,
+	int			flags);
+
+int
+xfs_set_dmattrs(
+	bhv_desc_t		*bdp,
+	u_int			evmask,
+	u_int16_t		state,
+	cred_t			*credp);
+
+#endif /* __XFS_RW_H__ */