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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/fs/freevxfs/vxfs_dir.h
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/fs/freevxfs/vxfs_dir.h')
-rw-r--r--kernel/fs/freevxfs/vxfs_dir.h92
1 files changed, 92 insertions, 0 deletions
diff --git a/kernel/fs/freevxfs/vxfs_dir.h b/kernel/fs/freevxfs/vxfs_dir.h
new file mode 100644
index 000000000..aaf1fb098
--- /dev/null
+++ b/kernel/fs/freevxfs/vxfs_dir.h
@@ -0,0 +1,92 @@
+/*
+ * Copyright (c) 2000-2001 Christoph Hellwig.
+ * 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,
+ * without modification.
+ * 2. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL").
+ *
+ * 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.
+ *
+ */
+#ifndef _VXFS_DIR_H_
+#define _VXFS_DIR_H_
+
+/*
+ * Veritas filesystem driver - directory structure.
+ *
+ * This file contains the definition of the vxfs directory format.
+ */
+
+
+/*
+ * VxFS directory block header.
+ *
+ * This entry is the head of every filesystem block in a directory.
+ * It is used for free space management and additionally includes
+ * a hash for speeding up directory search (lookup).
+ *
+ * The hash may be empty and in fact we do not use it all in the
+ * Linux driver for now.
+ */
+struct vxfs_dirblk {
+ u_int16_t d_free; /* free space in dirblock */
+ u_int16_t d_nhash; /* no of hash chains */
+ u_int16_t d_hash[1]; /* hash chain */
+};
+
+/*
+ * VXFS_NAMELEN is the maximum length of the d_name field
+ * of an VxFS directory entry.
+ */
+#define VXFS_NAMELEN 256
+
+/*
+ * VxFS directory entry.
+ */
+struct vxfs_direct {
+ vx_ino_t d_ino; /* inode number */
+ u_int16_t d_reclen; /* record length */
+ u_int16_t d_namelen; /* d_name length */
+ u_int16_t d_hashnext; /* next hash entry */
+ char d_name[VXFS_NAMELEN]; /* name */
+};
+
+/*
+ * VXFS_DIRPAD defines the directory entry boundaries, is _must_ be
+ * a multiple of four.
+ * VXFS_NAMEMIN is the length of a directory entry with a NULL d_name.
+ * VXFS_DIRROUND is an internal macros that rounds a length to a value
+ * usable for directory sizes.
+ * VXFS_DIRLEN calculates the directory entry size for an entry with
+ * a d_name with size len.
+ */
+#define VXFS_DIRPAD 4
+#define VXFS_NAMEMIN offsetof(struct vxfs_direct, d_name)
+#define VXFS_DIRROUND(len) ((VXFS_DIRPAD + (len) - 1) & ~(VXFS_DIRPAD -1))
+#define VXFS_DIRLEN(len) (VXFS_DIRROUND(VXFS_NAMEMIN + (len)))
+
+/*
+ * VXFS_DIRBLKOV is the overhead of a specific dirblock.
+ */
+#define VXFS_DIRBLKOV(dbp) ((sizeof(short) * dbp->d_nhash) + 4)
+
+#endif /* _VXFS_DIR_H_ */