^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * Copyright (c) 2000-2001 Christoph Hellwig.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Redistribution and use in source and binary forms, with or without
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * modification, are permitted provided that the following conditions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * are met:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * 1. Redistributions of source code must retain the above copyright
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * notice, this list of conditions, and the following disclaimer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * without modification.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * 2. The name of the author may not be used to endorse or promote products
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * derived from this software without specific prior written permission.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * Alternatively, this software may be distributed under the terms of the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * GNU General Public License ("GPL").
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * SUCH DAMAGE.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #ifndef _VXFS_DIR_H_
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #define _VXFS_DIR_H_
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) * Veritas filesystem driver - directory structure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * This file contains the definition of the vxfs directory format.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) * VxFS directory block header.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) * This entry is the head of every filesystem block in a directory.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) * It is used for free space management and additionally includes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) * a hash for speeding up directory search (lookup).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) * The hash may be empty and in fact we do not use it all in the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) * Linux driver for now.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) struct vxfs_dirblk {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) __fs16 d_free; /* free space in dirblock */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) __fs16 d_nhash; /* no of hash chains */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) __fs16 d_hash[1]; /* hash chain */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) * VXFS_NAMELEN is the maximum length of the d_name field
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) * of an VxFS directory entry.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) #define VXFS_NAMELEN 256
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) * VxFS directory entry.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) struct vxfs_direct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) __fs32 d_ino; /* inode number */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) __fs16 d_reclen; /* record length */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) __fs16 d_namelen; /* d_name length */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) __fs16 d_hashnext; /* next hash entry */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) char d_name[VXFS_NAMELEN]; /* name */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) * VXFS_DIRPAD defines the directory entry boundaries, is _must_ be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) * a multiple of four.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) * VXFS_NAMEMIN is the length of a directory entry with a NULL d_name.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) * VXFS_DIRROUND is an internal macros that rounds a length to a value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) * usable for directory sizes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) * VXFS_DIRLEN calculates the directory entry size for an entry with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) * a d_name with size len.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) #define VXFS_DIRPAD 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) #define VXFS_NAMEMIN offsetof(struct vxfs_direct, d_name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) #define VXFS_DIRROUND(len) ((VXFS_DIRPAD + (len) - 1) & ~(VXFS_DIRPAD -1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) #define VXFS_DIRLEN(len) (VXFS_DIRROUND(VXFS_NAMEMIN + (len)))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) * VXFS_DIRBLKOV is the overhead of a specific dirblock.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) #define VXFS_DIRBLKOV(sbi, dbp) \
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) ((sizeof(short) * fs16_to_cpu(sbi, dbp->d_nhash)) + 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) #endif /* _VXFS_DIR_H_ */
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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