/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ /* * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. * * This copyrighted material is made available to anyone wishing to use, * modify, copy, or redistribute it subject to the terms and conditions * of the GNU General Public License v.2. */ #ifndef __GFS2_ONDISK_DOT_H__ #define __GFS2_ONDISK_DOT_H__ #include <linux/types.h> #define GFS2_MAGIC … #define GFS2_BASIC_BLOCK … #define GFS2_BASIC_BLOCK_SHIFT … /* Lock numbers of the LM_TYPE_NONDISK type */ #define GFS2_MOUNT_LOCK … #define GFS2_LIVE_LOCK … #define GFS2_FREEZE_LOCK … #define GFS2_RENAME_LOCK … #define GFS2_CONTROL_LOCK … #define GFS2_MOUNTED_LOCK … /* Format numbers for various metadata types */ #define GFS2_FORMAT_NONE … #define GFS2_FORMAT_SB … #define GFS2_FORMAT_RG … #define GFS2_FORMAT_RB … #define GFS2_FORMAT_DI … #define GFS2_FORMAT_IN … #define GFS2_FORMAT_LF … #define GFS2_FORMAT_JD … #define GFS2_FORMAT_LH … #define GFS2_FORMAT_LD … #define GFS2_FORMAT_LB … #define GFS2_FORMAT_EA … #define GFS2_FORMAT_ED … #define GFS2_FORMAT_QC … /* These are format numbers for entities contained in files */ #define GFS2_FORMAT_RI … #define GFS2_FORMAT_DE … #define GFS2_FORMAT_QU … /* These are part of the superblock */ #define GFS2_FORMAT_FS … #define GFS2_FORMAT_MULTI … /* * An on-disk inode number */ struct gfs2_inum { … }; /* * Generic metadata head structure * Every inplace buffer logged in the journal must start with this. */ #define GFS2_METATYPE_NONE … #define GFS2_METATYPE_SB … #define GFS2_METATYPE_RG … #define GFS2_METATYPE_RB … #define GFS2_METATYPE_DI … #define GFS2_METATYPE_IN … #define GFS2_METATYPE_LF … #define GFS2_METATYPE_JD … #define GFS2_METATYPE_LH … #define GFS2_METATYPE_LD … #define GFS2_METATYPE_LB … #define GFS2_METATYPE_EA … #define GFS2_METATYPE_ED … #define GFS2_METATYPE_QC … struct gfs2_meta_header { … }; /* * super-block structure * * It's probably good if SIZEOF_SB <= GFS2_BASIC_BLOCK (512 bytes) * * Order is important, need to be able to read old superblocks to do on-disk * version upgrades. */ /* Address of superblock in GFS2 basic blocks */ #define GFS2_SB_ADDR … /* The lock number for the superblock (must be zero) */ #define GFS2_SB_LOCK … /* Requirement: GFS2_LOCKNAME_LEN % 8 == 0 Includes: the fencing zero at the end */ #define GFS2_LOCKNAME_LEN … struct gfs2_sb { … }; /* * resource index structure */ struct gfs2_rindex { … }; /* * resource group header structure */ /* Number of blocks per byte in rgrp */ #define GFS2_NBBY … #define GFS2_BIT_SIZE … #define GFS2_BIT_MASK … #define GFS2_BLKST_FREE … #define GFS2_BLKST_USED … #define GFS2_BLKST_UNLINKED … #define GFS2_BLKST_DINODE … #define GFS2_RGF_JOURNAL … #define GFS2_RGF_METAONLY … #define GFS2_RGF_DATAONLY … #define GFS2_RGF_NOALLOC … #define GFS2_RGF_TRIMMED … struct gfs2_inode_lvb { … }; struct gfs2_rgrp_lvb { … }; struct gfs2_rgrp { … }; /* * quota structure */ struct gfs2_quota { … }; /* * dinode structure */ #define GFS2_MAX_META_HEIGHT … #define GFS2_DIR_MAX_DEPTH … #define DT2IF(dt) … #define IF2DT(sif) … enum { … }; /* Dinode flags */ #define GFS2_DIF_JDATA … #define GFS2_DIF_EXHASH … #define GFS2_DIF_UNUSED … #define GFS2_DIF_EA_INDIRECT … #define GFS2_DIF_DIRECTIO … #define GFS2_DIF_IMMUTABLE … #define GFS2_DIF_APPENDONLY … #define GFS2_DIF_NOATIME … #define GFS2_DIF_SYNC … #define GFS2_DIF_SYSTEM … #define GFS2_DIF_TOPDIR … #define GFS2_DIF_TRUNC_IN_PROG … #define GFS2_DIF_INHERIT_DIRECTIO … #define GFS2_DIF_INHERIT_JDATA … struct gfs2_dinode { … }; /* * directory structure - many of these per directory file */ #define GFS2_FNAMESIZE … #define GFS2_DIRENT_SIZE(name_len) … #define GFS2_MIN_DIRENT_SIZE … struct gfs2_dirent { … }; /* * Header of leaf directory nodes */ struct gfs2_leaf { … }; /* * Extended attribute header format * * This works in a similar way to dirents. There is a fixed size header * followed by a variable length section made up of the name and the * associated data. In the case of a "stuffed" entry, the value is * inline directly after the name, the ea_num_ptrs entry will be * zero in that case. For non-"stuffed" entries, there will be * a set of pointers (aligned to 8 byte boundary) to the block(s) * containing the value. * * The blocks containing the values and the blocks containing the * extended attribute headers themselves all start with the common * metadata header. Each inode, if it has extended attributes, will * have either a single block containing the extended attribute headers * or a single indirect block pointing to blocks containing the * extended attribute headers. * * The maximum size of the data part of an extended attribute is 64k * so the number of blocks required depends upon block size. Since the * block size also determines the number of pointers in an indirect * block, its a fairly complicated calculation to work out the maximum * number of blocks that an inode may have relating to extended attributes. * */ #define GFS2_EA_MAX_NAME_LEN … #define GFS2_EA_MAX_DATA_LEN … #define GFS2_EATYPE_UNUSED … #define GFS2_EATYPE_USR … #define GFS2_EATYPE_SYS … #define GFS2_EATYPE_SECURITY … #define GFS2_EATYPE_TRUSTED … #define GFS2_EATYPE_LAST … #define GFS2_EATYPE_VALID(x) … #define GFS2_EAFLAG_LAST … struct gfs2_ea_header { … }; /* * Log header structure */ #define GFS2_LOG_HEAD_UNMOUNT … #define GFS2_LOG_HEAD_FLUSH_NORMAL … #define GFS2_LOG_HEAD_FLUSH_SYNC … #define GFS2_LOG_HEAD_FLUSH_SHUTDOWN … #define GFS2_LOG_HEAD_FLUSH_FREEZE … #define GFS2_LOG_HEAD_RECOVERY … #define GFS2_LOG_HEAD_USERSPACE … /* Log flush callers */ #define GFS2_LFC_SHUTDOWN … #define GFS2_LFC_JDATA_WPAGES … #define GFS2_LFC_SET_FLAGS … #define GFS2_LFC_AIL_EMPTY_GL … #define GFS2_LFC_AIL_FLUSH … #define GFS2_LFC_RGRP_GO_SYNC … #define GFS2_LFC_INODE_GO_SYNC … #define GFS2_LFC_INODE_GO_INVAL … #define GFS2_LFC_FREEZE_GO_SYNC … #define GFS2_LFC_KILL_SB … #define GFS2_LFC_DO_SYNC … #define GFS2_LFC_INPLACE_RESERVE … #define GFS2_LFC_WRITE_INODE … #define GFS2_LFC_MAKE_FS_RO … #define GFS2_LFC_SYNC_FS … #define GFS2_LFC_EVICT_INODE … #define GFS2_LFC_TRANS_END … #define GFS2_LFC_LOGD_JFLUSH_REQD … #define GFS2_LFC_LOGD_AIL_FLUSH_REQD … #define LH_V1_SIZE … struct gfs2_log_header { … }; /* * Log type descriptor */ #define GFS2_LOG_DESC_METADATA … /* ld_data1 is the number of metadata blocks in the descriptor. ld_data2 is unused. */ #define GFS2_LOG_DESC_REVOKE … /* ld_data1 is the number of revoke blocks in the descriptor. ld_data2 is unused. */ #define GFS2_LOG_DESC_JDATA … /* ld_data1 is the number of data blocks in the descriptor. ld_data2 is unused. */ struct gfs2_log_descriptor { … }; /* * Inum Range * Describe a range of formal inode numbers allocated to * one machine to assign to inodes. */ #define GFS2_INUM_QUANTUM … struct gfs2_inum_range { … }; /* * Statfs change * Describes an change to the pool of free and allocated * blocks. */ struct gfs2_statfs_change { … }; /* * Quota change * Describes an allocation change for a particular * user or group. */ #define GFS2_QCF_USER … struct gfs2_quota_change { … }; struct gfs2_quota_lvb { … }; #endif /* __GFS2_ONDISK_DOT_H__ */
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