| /* |
| * 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 |
| |
| 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_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_TRUNC_IN_PROG 0x20000000 /* New in gfs2 */ |
| #define GFS2_DIF_INHERIT_DIRECTIO 0x40000000 |
| #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__ */ |