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

• Lines: 179
• Date: 2004-02-18 05:36:32.000000000 -0800
• Orig file: linux-2.4.24/fs/xfs/xfs_dir_sf.h
• Orig date: 1969-12-31 16:00:00.000000000 -0800

diff -urN linux-2.4.24/fs/xfs/xfs_dir_sf.h linux-2.4.25/fs/xfs/xfs_dir_sf.h
@@ -0,0 +1,178 @@
+/*
+ * 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_DIR_SF_H__
+#define	__XFS_DIR_SF_H__
+
+/*
+ * Directory layout when stored internal to an inode.
+ *
+ * Small directories are packed as tightly as possible so as to
+ * fit into the literal area of the inode.
+ */
+
+typedef struct { __uint8_t i[sizeof(xfs_ino_t)]; } xfs_dir_ino_t;
+
+/*
+ * The parent directory has a dedicated field, and the self-pointer must
+ * be calculated on the fly.
+ *
+ * Entries are packed toward the top as tight as possible.  The header
+ * and the elements much be memcpy'd out into a work area to get correct
+ * alignment for the inode number fields.
+ */
+typedef struct xfs_dir_shortform {
+	struct xfs_dir_sf_hdr {		/* constant-structure header block */
+		xfs_dir_ino_t parent;	/* parent dir inode number */
+		__uint8_t count;	/* count of active entries */
+	} hdr;
+	struct xfs_dir_sf_entry {
+		xfs_dir_ino_t inumber;	/* referenced inode number */
+		__uint8_t namelen;	/* actual length of name (no NULL) */
+		__uint8_t name[1];	/* name */
+	} list[1];			/* variable sized array */
+} xfs_dir_shortform_t;
+typedef struct xfs_dir_sf_hdr xfs_dir_sf_hdr_t;
+typedef struct xfs_dir_sf_entry xfs_dir_sf_entry_t;
+
+/*
+ * We generate this then sort it, so that readdirs are returned in
+ * hash-order.  Else seekdir won't work.
+ */
+typedef struct xfs_dir_sf_sort {
+	__uint8_t	entno;		/* .=0, ..=1, else entry# + 2 */
+	__uint8_t	seqno;		/* sequence # with same hash value */
+	__uint8_t	namelen;	/* length of name value (no null) */
+	xfs_dahash_t	hash;		/* this entry's hash value */
+	xfs_intino_t	ino;		/* this entry's inode number */
+	char		*name;		/* name value, pointer into buffer */
+} xfs_dir_sf_sort_t;
+
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR_SF_GET_DIRINO)
+void xfs_dir_sf_get_dirino_arch(xfs_dir_ino_t *from, xfs_ino_t *to, xfs_arch_t arch);
+void xfs_dir_sf_get_dirino(xfs_dir_ino_t *from, xfs_ino_t *to);
+#define	XFS_DIR_SF_GET_DIRINO_ARCH(from,to,arch)    xfs_dir_sf_get_dirino_arch(from, to, arch)
+#define	XFS_DIR_SF_GET_DIRINO(from,to)		    xfs_dir_sf_get_dirino(from, to)
+#else
+#define	XFS_DIR_SF_GET_DIRINO_ARCH(from,to,arch)    DIRINO_COPY_ARCH(from,to,arch)
+#define	XFS_DIR_SF_GET_DIRINO(from,to)	            DIRINO_COPY_ARCH(from,to,ARCH_NOCONVERT)
+#endif
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR_SF_PUT_DIRINO)
+void xfs_dir_sf_put_dirino_arch(xfs_ino_t *from, xfs_dir_ino_t *to, xfs_arch_t arch);
+void xfs_dir_sf_put_dirino(xfs_ino_t *from, xfs_dir_ino_t *to);
+#define	XFS_DIR_SF_PUT_DIRINO_ARCH(from,to,arch)    xfs_dir_sf_put_dirino_arch(from, to, arch)
+#define	XFS_DIR_SF_PUT_DIRINO(from,to)		    xfs_dir_sf_put_dirino(from, to)
+#else
+#define	XFS_DIR_SF_PUT_DIRINO_ARCH(from,to,arch)    DIRINO_COPY_ARCH(from,to,arch)
+#define	XFS_DIR_SF_PUT_DIRINO(from,to)	            DIRINO_COPY_ARCH(from,to,ARCH_NOCONVERT)
+#endif
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR_SF_ENTSIZE_BYNAME)
+int xfs_dir_sf_entsize_byname(int len);
+#define XFS_DIR_SF_ENTSIZE_BYNAME(len)		xfs_dir_sf_entsize_byname(len)
+#else
+#define XFS_DIR_SF_ENTSIZE_BYNAME(len)		/* space a name uses */ \
+	((uint)sizeof(xfs_dir_sf_entry_t)-1 + (len))
+#endif
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR_SF_ENTSIZE_BYENTRY)
+int xfs_dir_sf_entsize_byentry(xfs_dir_sf_entry_t *sfep);
+#define XFS_DIR_SF_ENTSIZE_BYENTRY(sfep)	xfs_dir_sf_entsize_byentry(sfep)
+#else
+#define XFS_DIR_SF_ENTSIZE_BYENTRY(sfep)	/* space an entry uses */ \
+	((uint)sizeof(xfs_dir_sf_entry_t)-1 + (sfep)->namelen)
+#endif
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR_SF_NEXTENTRY)
+xfs_dir_sf_entry_t *xfs_dir_sf_nextentry(xfs_dir_sf_entry_t *sfep);
+#define XFS_DIR_SF_NEXTENTRY(sfep)		xfs_dir_sf_nextentry(sfep)
+#else
+#define XFS_DIR_SF_NEXTENTRY(sfep)		/* next entry in struct */ \
+	((xfs_dir_sf_entry_t *) \
+		((char *)(sfep) + XFS_DIR_SF_ENTSIZE_BYENTRY(sfep)))
+#endif
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DIR_SF_ALLFIT)
+int xfs_dir_sf_allfit(int count, int totallen);
+#define XFS_DIR_SF_ALLFIT(count,totallen)	\
+	xfs_dir_sf_allfit(count,totallen)
+#else
+#define XFS_DIR_SF_ALLFIT(count,totallen)	/* will all entries fit? */ \
+	((uint)sizeof(xfs_dir_sf_hdr_t) + \
+	       ((uint)sizeof(xfs_dir_sf_entry_t)-1)*(count) + (totallen))
+#endif
+
+#if defined(XFS_DIR_TRACE)
+
+/*
+ * Kernel tracing support for directories.
+ */
+struct uio;
+struct xfs_inode;
+struct xfs_da_intnode;
+struct xfs_dinode;
+struct xfs_dir_leafblock;
+struct xfs_dir_leaf_entry;
+
+#define	XFS_DIR_TRACE_SIZE	4096	/* size of global trace buffer */
+extern ktrace_t	*xfs_dir_trace_buf;
+
+/*
+ * Trace record types.
+ */
+#define	XFS_DIR_KTRACE_G_DU	1	/* dp, uio */
+#define	XFS_DIR_KTRACE_G_DUB	2	/* dp, uio, bno */
+#define	XFS_DIR_KTRACE_G_DUN	3	/* dp, uio, node */
+#define	XFS_DIR_KTRACE_G_DUL	4	/* dp, uio, leaf */
+#define	XFS_DIR_KTRACE_G_DUE	5	/* dp, uio, leaf entry */
+#define	XFS_DIR_KTRACE_G_DUC	6	/* dp, uio, cookie */
+
+void xfs_dir_trace_g_du(char *where, struct xfs_inode *dp, struct uio *uio);
+void xfs_dir_trace_g_dub(char *where, struct xfs_inode *dp, struct uio *uio,
+			      xfs_dablk_t bno);
+void xfs_dir_trace_g_dun(char *where, struct xfs_inode *dp, struct uio *uio,
+			      struct xfs_da_intnode *node);
+void xfs_dir_trace_g_dul(char *where, struct xfs_inode *dp, struct uio *uio,
+			      struct xfs_dir_leafblock *leaf);
+void xfs_dir_trace_g_due(char *where, struct xfs_inode *dp, struct uio *uio,
+			      struct xfs_dir_leaf_entry *entry);
+void xfs_dir_trace_g_duc(char *where, struct xfs_inode *dp, struct uio *uio,
+			      xfs_off_t cookie);
+void xfs_dir_trace_enter(int type, char *where,
+			     void *a0, void *a1, void *a2, void *a3,
+			     void *a4, void *a5, void *a6, void *a7,
+			     void *a8, void *a9, void *a10, void *a11);
+#else
+#define	xfs_dir_trace_g_du(w,d,u)
+#define	xfs_dir_trace_g_dub(w,d,u,b)
+#define	xfs_dir_trace_g_dun(w,d,u,n)
+#define	xfs_dir_trace_g_dul(w,d,u,l)
+#define	xfs_dir_trace_g_due(w,d,u,e)
+#define	xfs_dir_trace_g_duc(w,d,u,c)
+#endif /* DEBUG */
+
+#endif	/* __XFS_DIR_SF_H__ */