273 lines
8.2 KiB
C
273 lines
8.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
/*
|
|
* Copyright (C) International Business Machines Corp., 2000-2003
|
|
*/
|
|
#ifndef _H_JFS_FILSYS
|
|
#define _H_JFS_FILSYS
|
|
|
|
/*
|
|
* jfs_filsys.h
|
|
*
|
|
* file system (implementation-dependent) constants
|
|
*
|
|
* refer to <limits.h> for system wide implementation-dependent constants
|
|
*/
|
|
|
|
/*
|
|
* file system option (superblock flag)
|
|
*/
|
|
|
|
/* directory option */
|
|
#define JFS_UNICODE 0x00000001 /* unicode name */
|
|
|
|
/* mount time flags for error handling */
|
|
#define JFS_ERR_REMOUNT_RO 0x00000002 /* remount read-only */
|
|
#define JFS_ERR_CONTINUE 0x00000004 /* continue */
|
|
#define JFS_ERR_PANIC 0x00000008 /* panic */
|
|
|
|
/* Quota support */
|
|
#define JFS_USRQUOTA 0x00000010
|
|
#define JFS_GRPQUOTA 0x00000020
|
|
|
|
/* mount time flag to disable journaling to disk */
|
|
#define JFS_NOINTEGRITY 0x00000040
|
|
|
|
/* mount time flag to enable TRIM to ssd disks */
|
|
#define JFS_DISCARD 0x00000080
|
|
|
|
/* commit option */
|
|
#define JFS_COMMIT 0x00000f00 /* commit option mask */
|
|
#define JFS_GROUPCOMMIT 0x00000100 /* group (of 1) commit */
|
|
#define JFS_LAZYCOMMIT 0x00000200 /* lazy commit */
|
|
#define JFS_TMPFS 0x00000400 /* temporary file system -
|
|
* do not log/commit:
|
|
* Never implemented
|
|
*/
|
|
|
|
/* log logical volume option */
|
|
#define JFS_INLINELOG 0x00000800 /* inline log within file system */
|
|
#define JFS_INLINEMOVE 0x00001000 /* inline log being moved */
|
|
|
|
/* Secondary aggregate inode table */
|
|
#define JFS_BAD_SAIT 0x00010000 /* current secondary ait is bad */
|
|
|
|
/* sparse regular file support */
|
|
#define JFS_SPARSE 0x00020000 /* sparse regular file */
|
|
|
|
/* DASD Limits F226941 */
|
|
#define JFS_DASD_ENABLED 0x00040000 /* DASD limits enabled */
|
|
#define JFS_DASD_PRIME 0x00080000 /* Prime DASD usage on boot */
|
|
|
|
/* big endian flag */
|
|
#define JFS_SWAP_BYTES 0x00100000 /* running on big endian computer */
|
|
|
|
/* Directory index */
|
|
#define JFS_DIR_INDEX 0x00200000 /* Persistent index for */
|
|
|
|
/* platform options */
|
|
#define JFS_LINUX 0x10000000 /* Linux support */
|
|
#define JFS_DFS 0x20000000 /* DCE DFS LFS support */
|
|
/* Never implemented */
|
|
|
|
#define JFS_OS2 0x40000000 /* OS/2 support */
|
|
/* case-insensitive name/directory support */
|
|
|
|
#define JFS_AIX 0x80000000 /* AIX support */
|
|
|
|
/*
|
|
* buffer cache configuration
|
|
*/
|
|
/* page size */
|
|
#ifdef PSIZE
|
|
#undef PSIZE
|
|
#endif
|
|
#define PSIZE 4096 /* page size (in byte) */
|
|
#define L2PSIZE 12 /* log2(PSIZE) */
|
|
#define POFFSET 4095 /* offset within page */
|
|
|
|
/* buffer page size */
|
|
#define BPSIZE PSIZE
|
|
|
|
/*
|
|
* fs fundamental size
|
|
*
|
|
* PSIZE >= file system block size >= PBSIZE >= DISIZE
|
|
*/
|
|
#define PBSIZE 512 /* physical block size (in byte) */
|
|
#define L2PBSIZE 9 /* log2(PBSIZE) */
|
|
|
|
#define DISIZE 512 /* on-disk inode size (in byte) */
|
|
#define L2DISIZE 9 /* log2(DISIZE) */
|
|
|
|
#define IDATASIZE 256 /* inode inline data size */
|
|
#define IXATTRSIZE 128 /* inode inline extended attribute size */
|
|
|
|
#define XTPAGE_SIZE 4096
|
|
#define log2_PAGESIZE 12
|
|
|
|
#define IAG_SIZE 4096
|
|
#define IAG_EXTENT_SIZE 4096
|
|
#define INOSPERIAG 4096 /* number of disk inodes per iag */
|
|
#define L2INOSPERIAG 12 /* l2 number of disk inodes per iag */
|
|
#define INOSPEREXT 32 /* number of disk inode per extent */
|
|
#define L2INOSPEREXT 5 /* l2 number of disk inode per extent */
|
|
#define IXSIZE (DISIZE * INOSPEREXT) /* inode extent size */
|
|
#define INOSPERPAGE 8 /* number of disk inodes per 4K page */
|
|
#define L2INOSPERPAGE 3 /* log2(INOSPERPAGE) */
|
|
|
|
#define IAGFREELIST_LWM 64
|
|
|
|
#define INODE_EXTENT_SIZE IXSIZE /* inode extent size */
|
|
#define NUM_INODE_PER_EXTENT INOSPEREXT
|
|
#define NUM_INODE_PER_IAG INOSPERIAG
|
|
|
|
#define MINBLOCKSIZE 512
|
|
#define MAXBLOCKSIZE 4096
|
|
#define MAXFILESIZE ((s64)1 << 52)
|
|
|
|
#define JFS_LINK_MAX 0xffffffff
|
|
|
|
/* Minimum number of bytes supported for a JFS partition */
|
|
#define MINJFS (0x1000000)
|
|
#define MINJFSTEXT "16"
|
|
|
|
/*
|
|
* file system block size -> physical block size
|
|
*/
|
|
#define LBOFFSET(x) ((x) & (PBSIZE - 1))
|
|
#define LBNUMBER(x) ((x) >> L2PBSIZE)
|
|
#define LBLK2PBLK(sb,b) ((b) << (sb->s_blocksize_bits - L2PBSIZE))
|
|
#define PBLK2LBLK(sb,b) ((b) >> (sb->s_blocksize_bits - L2PBSIZE))
|
|
/* size in byte -> last page number */
|
|
#define SIZE2PN(size) ( ((s64)((size) - 1)) >> (L2PSIZE) )
|
|
/* size in byte -> last file system block number */
|
|
#define SIZE2BN(size, l2bsize) ( ((s64)((size) - 1)) >> (l2bsize) )
|
|
|
|
/*
|
|
* fixed physical block address (physical block size = 512 byte)
|
|
*
|
|
* NOTE: since we can't guarantee a physical block size of 512 bytes the use of
|
|
* these macros should be removed and the byte offset macros used instead.
|
|
*/
|
|
#define SUPER1_B 64 /* primary superblock */
|
|
#define AIMAP_B (SUPER1_B + 8) /* 1st extent of aggregate inode map */
|
|
#define AITBL_B (AIMAP_B + 16) /*
|
|
* 1st extent of aggregate inode table
|
|
*/
|
|
#define SUPER2_B (AITBL_B + 32) /* 2ndary superblock pbn */
|
|
#define BMAP_B (SUPER2_B + 8) /* block allocation map */
|
|
|
|
/*
|
|
* SIZE_OF_SUPER defines the total amount of space reserved on disk for the
|
|
* superblock. This is not the same as the superblock structure, since all of
|
|
* this space is not currently being used.
|
|
*/
|
|
#define SIZE_OF_SUPER PSIZE
|
|
|
|
/*
|
|
* SIZE_OF_AG_TABLE defines the amount of space reserved to hold the AG table
|
|
*/
|
|
#define SIZE_OF_AG_TABLE PSIZE
|
|
|
|
/*
|
|
* SIZE_OF_MAP_PAGE defines the amount of disk space reserved for each page of
|
|
* the inode allocation map (to hold iag)
|
|
*/
|
|
#define SIZE_OF_MAP_PAGE PSIZE
|
|
|
|
/*
|
|
* fixed byte offset address
|
|
*/
|
|
#define SUPER1_OFF 0x8000 /* primary superblock */
|
|
#define AIMAP_OFF (SUPER1_OFF + SIZE_OF_SUPER)
|
|
/*
|
|
* Control page of aggregate inode map
|
|
* followed by 1st extent of map
|
|
*/
|
|
#define AITBL_OFF (AIMAP_OFF + (SIZE_OF_MAP_PAGE << 1))
|
|
/*
|
|
* 1st extent of aggregate inode table
|
|
*/
|
|
#define SUPER2_OFF (AITBL_OFF + INODE_EXTENT_SIZE)
|
|
/*
|
|
* secondary superblock
|
|
*/
|
|
#define BMAP_OFF (SUPER2_OFF + SIZE_OF_SUPER)
|
|
/*
|
|
* block allocation map
|
|
*/
|
|
|
|
/*
|
|
* The following macro is used to indicate the number of reserved disk blocks at
|
|
* the front of an aggregate, in terms of physical blocks. This value is
|
|
* currently defined to be 32K. This turns out to be the same as the primary
|
|
* superblock's address, since it directly follows the reserved blocks.
|
|
*/
|
|
#define AGGR_RSVD_BLOCKS SUPER1_B
|
|
|
|
/*
|
|
* The following macro is used to indicate the number of reserved bytes at the
|
|
* front of an aggregate. This value is currently defined to be 32K. This
|
|
* turns out to be the same as the primary superblock's byte offset, since it
|
|
* directly follows the reserved blocks.
|
|
*/
|
|
#define AGGR_RSVD_BYTES SUPER1_OFF
|
|
|
|
/*
|
|
* The following macro defines the byte offset for the first inode extent in
|
|
* the aggregate inode table. This allows us to find the self inode to find the
|
|
* rest of the table. Currently this value is 44K.
|
|
*/
|
|
#define AGGR_INODE_TABLE_START AITBL_OFF
|
|
|
|
/*
|
|
* fixed reserved inode number
|
|
*/
|
|
/* aggregate inode */
|
|
#define AGGR_RESERVED_I 0 /* aggregate inode (reserved) */
|
|
#define AGGREGATE_I 1 /* aggregate inode map inode */
|
|
#define BMAP_I 2 /* aggregate block allocation map inode */
|
|
#define LOG_I 3 /* aggregate inline log inode */
|
|
#define BADBLOCK_I 4 /* aggregate bad block inode */
|
|
#define FILESYSTEM_I 16 /* 1st/only fileset inode in ait:
|
|
* fileset inode map inode
|
|
*/
|
|
|
|
/* per fileset inode */
|
|
#define FILESET_RSVD_I 0 /* fileset inode (reserved) */
|
|
#define FILESET_EXT_I 1 /* fileset inode extension */
|
|
#define ROOT_I 2 /* fileset root inode */
|
|
#define ACL_I 3 /* fileset ACL inode */
|
|
|
|
#define FILESET_OBJECT_I 4 /* the first fileset inode available for a file
|
|
* or directory or link...
|
|
*/
|
|
#define FIRST_FILESET_INO 16 /* the first aggregate inode which describes
|
|
* an inode. (To fsck this is also the first
|
|
* inode in part 2 of the agg inode table.)
|
|
*/
|
|
|
|
/*
|
|
* directory configuration
|
|
*/
|
|
#define JFS_NAME_MAX 255
|
|
#define JFS_PATH_MAX BPSIZE
|
|
|
|
|
|
/*
|
|
* file system state (superblock state)
|
|
*/
|
|
#define FM_CLEAN 0x00000000 /* file system is unmounted and clean */
|
|
#define FM_MOUNT 0x00000001 /* file system is mounted cleanly */
|
|
#define FM_DIRTY 0x00000002 /* file system was not unmounted and clean
|
|
* when mounted or
|
|
* commit failure occurred while being mounted:
|
|
* fsck() must be run to repair
|
|
*/
|
|
#define FM_LOGREDO 0x00000004 /* log based recovery (logredo()) failed:
|
|
* fsck() must be run to repair
|
|
*/
|
|
#define FM_EXTENDFS 0x00000008 /* file system extendfs() in progress */
|
|
|
|
#endif /* _H_JFS_FILSYS */
|