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Diffstat (limited to 'include/linux/gfs2_ondisk.h')
| -rw-r--r-- | include/linux/gfs2_ondisk.h | 464 |
1 files changed, 0 insertions, 464 deletions
diff --git a/include/linux/gfs2_ondisk.h b/include/linux/gfs2_ondisk.h deleted file mode 100644 index b2de1f9..0000000 --- a/include/linux/gfs2_ondisk.h +++ /dev/null @@ -1,464 +0,0 @@ -/* - * 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 0x01161970 -#define GFS2_BASIC_BLOCK 512 -#define GFS2_BASIC_BLOCK_SHIFT 9 - -/* Lock numbers of the LM_TYPE_NONDISK type */ - -#define GFS2_MOUNT_LOCK 0 -#define GFS2_LIVE_LOCK 1 -#define GFS2_TRANS_LOCK 2 -#define GFS2_RENAME_LOCK 3 -#define GFS2_CONTROL_LOCK 4 -#define GFS2_MOUNTED_LOCK 5 - -/* Format numbers for various metadata types */ - -#define GFS2_FORMAT_NONE 0 -#define GFS2_FORMAT_SB 100 -#define GFS2_FORMAT_RG 200 -#define GFS2_FORMAT_RB 300 -#define GFS2_FORMAT_DI 400 -#define GFS2_FORMAT_IN 500 -#define GFS2_FORMAT_LF 600 -#define GFS2_FORMAT_JD 700 -#define GFS2_FORMAT_LH 800 -#define GFS2_FORMAT_LD 900 -#define GFS2_FORMAT_LB 1000 -#define GFS2_FORMAT_EA 1600 -#define GFS2_FORMAT_ED 1700 -#define GFS2_FORMAT_QC 1400 -/* These are format numbers for entities contained in files */ -#define GFS2_FORMAT_RI 1100 -#define GFS2_FORMAT_DE 1200 -#define GFS2_FORMAT_QU 1500 -/* These are part of the superblock */ -#define GFS2_FORMAT_FS 1801 -#define GFS2_FORMAT_MULTI 1900 - -/* - * An on-disk inode number - */ - -struct gfs2_inum { - __be64 no_formal_ino; - __be64 no_addr; -}; - -/* - * Generic metadata head structure - * Every inplace buffer logged in the journal must start with this. - */ - -#define GFS2_METATYPE_NONE 0 -#define GFS2_METATYPE_SB 1 -#define GFS2_METATYPE_RG 2 -#define GFS2_METATYPE_RB 3 -#define GFS2_METATYPE_DI 4 -#define GFS2_METATYPE_IN 5 -#define GFS2_METATYPE_LF 6 -#define GFS2_METATYPE_JD 7 -#define GFS2_METATYPE_LH 8 -#define GFS2_METATYPE_LD 9 -#define GFS2_METATYPE_LB 12 -#define GFS2_METATYPE_EA 10 -#define GFS2_METATYPE_ED 11 -#define GFS2_METATYPE_QC 14 - -struct gfs2_meta_header { - __be32 mh_magic; - __be32 mh_type; - __be64 __pad0; /* Was generation number in gfs1 */ - __be32 mh_format; - /* This union is to keep userspace happy */ - union { - __be32 mh_jid; /* Was incarnation number in gfs1 */ - __be32 __pad1; - }; -}; - -/* - * 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 128 - -/* The lock number for the superblock (must be zero) */ -#define GFS2_SB_LOCK 0 - -/* Requirement: GFS2_LOCKNAME_LEN % 8 == 0 - Includes: the fencing zero at the end */ -#define GFS2_LOCKNAME_LEN 64 - -struct gfs2_sb { - struct gfs2_meta_header sb_header; - - __be32 sb_fs_format; - __be32 sb_multihost_format; - __u32 __pad0; /* Was superblock flags in gfs1 */ - - __be32 sb_bsize; - __be32 sb_bsize_shift; - __u32 __pad1; /* Was journal segment size in gfs1 */ - - struct gfs2_inum sb_master_dir; /* Was jindex dinode in gfs1 */ - struct gfs2_inum __pad2; /* Was rindex dinode in gfs1 */ - struct gfs2_inum sb_root_dir; - - char sb_lockproto[GFS2_LOCKNAME_LEN]; - char sb_locktable[GFS2_LOCKNAME_LEN]; - - struct gfs2_inum __pad3; /* Was quota inode in gfs1 */ - struct gfs2_inum __pad4; /* Was licence inode in gfs1 */ -#define GFS2_HAS_UUID 1 - __u8 sb_uuid[16]; /* The UUID, maybe 0 for backwards compat */ -}; - -/* - * resource index structure - */ - -struct gfs2_rindex { - __be64 ri_addr; /* grp block disk address */ - __be32 ri_length; /* length of rgrp header in fs blocks */ - __u32 __pad; - - __be64 ri_data0; /* first data location */ - __be32 ri_data; /* num of data blocks in rgrp */ - - __be32 ri_bitbytes; /* number of bytes in data bitmaps */ - - __u8 ri_reserved[64]; -}; - -/* - * resource group header structure - */ - -/* Number of blocks per byte in rgrp */ -#define GFS2_NBBY 4 -#define GFS2_BIT_SIZE 2 -#define GFS2_BIT_MASK 0x00000003 - -#define GFS2_BLKST_FREE 0 -#define GFS2_BLKST_USED 1 -#define GFS2_BLKST_UNLINKED 2 -#define GFS2_BLKST_DINODE 3 - -#define GFS2_RGF_JOURNAL 0x00000001 -#define GFS2_RGF_METAONLY 0x00000002 -#define GFS2_RGF_DATAONLY 0x00000004 -#define GFS2_RGF_NOALLOC 0x00000008 -#define GFS2_RGF_TRIMMED 0x00000010 - -struct gfs2_rgrp_lvb { - __be32 rl_magic; - __be32 rl_flags; - __be32 rl_free; - __be32 rl_dinodes; - __be64 rl_igeneration; - __be32 rl_unlinked; - __be32 __pad; -}; - -struct gfs2_rgrp { - struct gfs2_meta_header rg_header; - - __be32 rg_flags; - __be32 rg_free; - __be32 rg_dinodes; - __be32 __pad; - __be64 rg_igeneration; - - __u8 rg_reserved[80]; /* Several fields from gfs1 now reserved */ -}; - -/* - * quota structure - */ - -struct gfs2_quota { - __be64 qu_limit; - __be64 qu_warn; - __be64 qu_value; - __u8 qu_reserved[64]; -}; - -/* - * dinode structure - */ - -#define GFS2_MAX_META_HEIGHT 10 -#define GFS2_DIR_MAX_DEPTH 17 - -#define DT2IF(dt) (((dt) << 12) & S_IFMT) -#define IF2DT(sif) (((sif) & S_IFMT) >> 12) - -enum { - gfs2fl_Jdata = 0, - gfs2fl_ExHash = 1, - gfs2fl_Unused = 2, - gfs2fl_EaIndirect = 3, - gfs2fl_Directio = 4, - gfs2fl_Immutable = 5, - gfs2fl_AppendOnly = 6, - gfs2fl_NoAtime = 7, - gfs2fl_Sync = 8, - gfs2fl_System = 9, - gfs2fl_TopLevel = 10, - gfs2fl_TruncInProg = 29, - gfs2fl_InheritDirectio = 30, - gfs2fl_InheritJdata = 31, -}; - -/* Dinode flags */ -#define GFS2_DIF_JDATA 0x00000001 -#define GFS2_DIF_EXHASH 0x00000002 -#define GFS2_DIF_UNUSED 0x00000004 /* only in gfs1 */ -#define GFS2_DIF_EA_INDIRECT 0x00000008 -#define GFS2_DIF_DIRECTIO 0x00000010 -#define GFS2_DIF_IMMUTABLE 0x00000020 -#define GFS2_DIF_APPENDONLY 0x00000040 -#define GFS2_DIF_NOATIME 0x00000080 -#define GFS2_DIF_SYNC 0x00000100 -#define GFS2_DIF_SYSTEM 0x00000200 /* New in gfs2 */ -#define GFS2_DIF_TOPDIR 0x00000400 /* New in gfs2 */ -#define GFS2_DIF_TRUNC_IN_PROG 0x20000000 /* New in gfs2 */ -#define GFS2_DIF_INHERIT_DIRECTIO 0x40000000 /* only in gfs1 */ -#define GFS2_DIF_INHERIT_JDATA 0x80000000 - -struct gfs2_dinode { - struct gfs2_meta_header di_header; - - struct gfs2_inum di_num; - - __be32 di_mode; /* mode of file */ - __be32 di_uid; /* owner's user id */ - __be32 di_gid; /* owner's group id */ - __be32 di_nlink; /* number of links to this file */ - __be64 di_size; /* number of bytes in file */ - __be64 di_blocks; /* number of blocks in file */ - __be64 di_atime; /* time last accessed */ - __be64 di_mtime; /* time last modified */ - __be64 di_ctime; /* time last changed */ - __be32 di_major; /* device major number */ - __be32 di_minor; /* device minor number */ - - /* This section varies from gfs1. Padding added to align with - * remainder of dinode - */ - __be64 di_goal_meta; /* rgrp to alloc from next */ - __be64 di_goal_data; /* data block goal */ - __be64 di_generation; /* generation number for NFS */ - - __be32 di_flags; /* GFS2_DIF_... */ - __be32 di_payload_format; /* GFS2_FORMAT_... */ - __u16 __pad1; /* Was ditype in gfs1 */ - __be16 di_height; /* height of metadata */ - __u32 __pad2; /* Unused incarnation number from gfs1 */ - - /* These only apply to directories */ - __u16 __pad3; /* Padding */ - __be16 di_depth; /* Number of bits in the table */ - __be32 di_entries; /* The number of entries in the directory */ - - struct gfs2_inum __pad4; /* Unused even in current gfs1 */ - - __be64 di_eattr; /* extended attribute block number */ - __be32 di_atime_nsec; /* nsec portion of atime */ - __be32 di_mtime_nsec; /* nsec portion of mtime */ - __be32 di_ctime_nsec; /* nsec portion of ctime */ - - __u8 di_reserved[44]; -}; - -/* - * directory structure - many of these per directory file - */ - -#define GFS2_FNAMESIZE 255 -#define GFS2_DIRENT_SIZE(name_len) ((sizeof(struct gfs2_dirent) + (name_len) + 7) & ~7) - -struct gfs2_dirent { - struct gfs2_inum de_inum; - __be32 de_hash; - __be16 de_rec_len; - __be16 de_name_len; - __be16 de_type; - __u8 __pad[14]; -}; - -/* - * Header of leaf directory nodes - */ - -struct gfs2_leaf { - struct gfs2_meta_header lf_header; - - __be16 lf_depth; /* Depth of leaf */ - __be16 lf_entries; /* Number of dirents in leaf */ - __be32 lf_dirent_format; /* Format of the dirents */ - __be64 lf_next; /* Next leaf, if overflow */ - - __u8 lf_reserved[64]; -}; - -/* - * 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 attribure headers. - * - * The maximim 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 255 -#define GFS2_EA_MAX_DATA_LEN 65536 - -#define GFS2_EATYPE_UNUSED 0 -#define GFS2_EATYPE_USR 1 -#define GFS2_EATYPE_SYS 2 -#define GFS2_EATYPE_SECURITY 3 - -#define GFS2_EATYPE_LAST 3 -#define GFS2_EATYPE_VALID(x) ((x) <= GFS2_EATYPE_LAST) - -#define GFS2_EAFLAG_LAST 0x01 /* last ea in block */ - -struct gfs2_ea_header { - __be32 ea_rec_len; - __be32 ea_data_len; - __u8 ea_name_len; /* no NULL pointer after the string */ - __u8 ea_type; /* GFS2_EATYPE_... */ - __u8 ea_flags; /* GFS2_EAFLAG_... */ - __u8 ea_num_ptrs; - __u32 __pad; -}; - -/* - * Log header structure - */ - -#define GFS2_LOG_HEAD_UNMOUNT 0x00000001 /* log is clean */ - -struct gfs2_log_header { - struct gfs2_meta_header lh_header; - - __be64 lh_sequence; /* Sequence number of this transaction */ - __be32 lh_flags; /* GFS2_LOG_HEAD_... */ - __be32 lh_tail; /* Block number of log tail */ - __be32 lh_blkno; - __be32 lh_hash; -}; - -/* - * Log type descriptor - */ - -#define GFS2_LOG_DESC_METADATA 300 -/* ld_data1 is the number of metadata blocks in the descriptor. - ld_data2 is unused. */ - -#define GFS2_LOG_DESC_REVOKE 301 -/* ld_data1 is the number of revoke blocks in the descriptor. - ld_data2 is unused. */ - -#define GFS2_LOG_DESC_JDATA 302 -/* ld_data1 is the number of data blocks in the descriptor. - ld_data2 is unused. */ - -struct gfs2_log_descriptor { - struct gfs2_meta_header ld_header; - - __be32 ld_type; /* GFS2_LOG_DESC_... */ - __be32 ld_length; /* Number of buffers in this chunk */ - __be32 ld_data1; /* descriptor-specific field */ - __be32 ld_data2; /* descriptor-specific field */ - - __u8 ld_reserved[32]; -}; - -/* - * Inum Range - * Describe a range of formal inode numbers allocated to - * one machine to assign to inodes. - */ - -#define GFS2_INUM_QUANTUM 1048576 - -struct gfs2_inum_range { - __be64 ir_start; - __be64 ir_length; -}; - -/* - * Statfs change - * Describes an change to the pool of free and allocated - * blocks. - */ - -struct gfs2_statfs_change { - __be64 sc_total; - __be64 sc_free; - __be64 sc_dinodes; -}; - -/* - * Quota change - * Describes an allocation change for a particular - * user or group. - */ - -#define GFS2_QCF_USER 0x00000001 - -struct gfs2_quota_change { - __be64 qc_change; - __be32 qc_flags; /* GFS2_QCF_... */ - __be32 qc_id; -}; - -struct gfs2_quota_lvb { - __be32 qb_magic; - __u32 __pad; - __be64 qb_limit; /* Hard limit of # blocks to alloc */ - __be64 qb_warn; /* Warn user when alloc is above this # */ - __be64 qb_value; /* Current # blocks allocated */ -}; - -#endif /* __GFS2_ONDISK_DOT_H__ */ |
