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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-17 02:20:36 +0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-17 02:20:36 +0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /fs/xfs/xfs_dir2.h
downloadlinux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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+/*
+ * Copyright (c) 2000-2001 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_DIR2_H__
+#define __XFS_DIR2_H__
+
+struct uio;
+struct xfs_dabuf;
+struct xfs_da_args;
+struct xfs_dir2_put_args;
+struct xfs_inode;
+struct xfs_trans;
+
+/*
+ * Directory version 2.
+ * There are 4 possible formats:
+ * shortform
+ * single block - data with embedded leaf at the end
+ * multiple data blocks, single leaf+freeindex block
+ * data blocks, node&leaf blocks (btree), freeindex blocks
+ *
+ * The shortform format is in xfs_dir2_sf.h.
+ * The single block format is in xfs_dir2_block.h.
+ * The data block format is in xfs_dir2_data.h.
+ * The leaf and freeindex block formats are in xfs_dir2_leaf.h.
+ * Node blocks are the same as the other version, in xfs_da_btree.h.
+ */
+
+/*
+ * Byte offset in data block and shortform entry.
+ */
+typedef __uint16_t xfs_dir2_data_off_t;
+#define NULLDATAOFF 0xffffU
+typedef uint xfs_dir2_data_aoff_t; /* argument form */
+
+/*
+ * Directory block number (logical dirblk in file)
+ */
+typedef __uint32_t xfs_dir2_db_t;
+
+/*
+ * Byte offset in a directory.
+ */
+typedef xfs_off_t xfs_dir2_off_t;
+
+/*
+ * For getdents, argument struct for put routines.
+ */
+typedef int (*xfs_dir2_put_t)(struct xfs_dir2_put_args *pa);
+typedef struct xfs_dir2_put_args {
+ xfs_off_t cook; /* cookie of (next) entry */
+ xfs_intino_t ino; /* inode number */
+ struct xfs_dirent *dbp; /* buffer pointer */
+ char *name; /* directory entry name */
+ int namelen; /* length of name */
+ int done; /* output: set if value was stored */
+ xfs_dir2_put_t put; /* put function ptr (i/o) */
+ struct uio *uio; /* uio control structure */
+} xfs_dir2_put_args_t;
+
+#define XFS_DIR_IS_V2(mp) ((mp)->m_dirversion == 2)
+extern xfs_dirops_t xfsv2_dirops;
+
+/*
+ * Other interfaces used by the rest of the dir v2 code.
+ */
+extern int
+ xfs_dir2_grow_inode(struct xfs_da_args *args, int space,
+ xfs_dir2_db_t *dbp);
+
+extern int
+ xfs_dir2_isblock(struct xfs_trans *tp, struct xfs_inode *dp, int *vp);
+
+extern int
+ xfs_dir2_isleaf(struct xfs_trans *tp, struct xfs_inode *dp, int *vp);
+
+extern int
+ xfs_dir2_shrink_inode(struct xfs_da_args *args, xfs_dir2_db_t db,
+ struct xfs_dabuf *bp);
+
+#endif /* __XFS_DIR2_H__ */