/* * Taken from Linux kernel tree (linux/fs/xfs) * * Copyright (c) 2000-2005 Silicon Graphics, Inc. * All Rights Reserved. * * Copyright (c) 2012 Paulo Alcantara <pcacjr@zytor.com> * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation. * * This program is distributed in the hope that it would be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #ifndef XFS_SB_H_ #define XFS_SB_H_ #include <stddef.h> #include <sys/types.h> typedef unsigned char uuid_t[16]; /* * Super block * Fits into a sector-sized buffer at address 0 of each allocation group. * Only the first of these is ever updated except during growfs. */ struct xfs_buf; struct xfs_mount; #define XFS_SB_MAGIC "XFSB" /* 'XFSB' */ #define XFS_SB_VERSION_1 1 /* 5.3, 6.0.1, 6.1 */ #define XFS_SB_VERSION_2 2 /* 6.2 - attributes */ #define XFS_SB_VERSION_3 3 /* 6.2 - new inode version */ #define XFS_SB_VERSION_4 4 /* 6.2+ - bitmask version */ #define XFS_SB_VERSION_NUMBITS 0x000f #define XFS_SB_VERSION_ALLFBITS 0xfff0 #define XFS_SB_VERSION_SASHFBITS 0xf000 #define XFS_SB_VERSION_REALFBITS 0x0ff0 #define XFS_SB_VERSION_ATTRBIT 0x0010 #define XFS_SB_VERSION_NLINKBIT 0x0020 #define XFS_SB_VERSION_QUOTABIT 0x0040 #define XFS_SB_VERSION_ALIGNBIT 0x0080 #define XFS_SB_VERSION_DALIGNBIT 0x0100 #define XFS_SB_VERSION_SHAREDBIT 0x0200 #define XFS_SB_VERSION_LOGV2BIT 0x0400 #define XFS_SB_VERSION_SECTORBIT 0x0800 #define XFS_SB_VERSION_EXTFLGBIT 0x1000 #define XFS_SB_VERSION_DIRV2BIT 0x2000 #define XFS_SB_VERSION_BORGBIT 0x4000 /* ASCII only case-insens. */ #define XFS_SB_VERSION_MOREBITSBIT 0x8000 #define XFS_SB_VERSION_OKSASHFBITS \ (XFS_SB_VERSION_EXTFLGBIT | \ XFS_SB_VERSION_DIRV2BIT | \ XFS_SB_VERSION_BORGBIT) #define XFS_SB_VERSION_OKREALFBITS \ (XFS_SB_VERSION_ATTRBIT | \ XFS_SB_VERSION_NLINKBIT | \ XFS_SB_VERSION_QUOTABIT | \ XFS_SB_VERSION_ALIGNBIT | \ XFS_SB_VERSION_DALIGNBIT | \ XFS_SB_VERSION_SHAREDBIT | \ XFS_SB_VERSION_LOGV2BIT | \ XFS_SB_VERSION_SECTORBIT | \ XFS_SB_VERSION_MOREBITSBIT) #define XFS_SB_VERSION_OKREALBITS \ (XFS_SB_VERSION_NUMBITS | \ XFS_SB_VERSION_OKREALFBITS | \ XFS_SB_VERSION_OKSASHFBITS) /* * There are two words to hold XFS "feature" bits: the original * word, sb_versionnum, and sb_features2. Whenever a bit is set in * sb_features2, the feature bit XFS_SB_VERSION_MOREBITSBIT must be set. * * These defines represent bits in sb_features2. */ #define XFS_SB_VERSION2_REALFBITS 0x00ffffff /* Mask: features */ #define XFS_SB_VERSION2_RESERVED1BIT 0x00000001 #define XFS_SB_VERSION2_LAZYSBCOUNTBIT 0x00000002 /* Superblk counters */ #define XFS_SB_VERSION2_RESERVED4BIT 0x00000004 #define XFS_SB_VERSION2_ATTR2BIT 0x00000008 /* Inline attr rework */ #define XFS_SB_VERSION2_PARENTBIT 0x00000010 /* parent pointers */ #define XFS_SB_VERSION2_PROJID32BIT 0x00000080 /* 32 bit project id */ #define XFS_SB_VERSION2_OKREALFBITS \ (XFS_SB_VERSION2_LAZYSBCOUNTBIT | \ XFS_SB_VERSION2_ATTR2BIT | \ XFS_SB_VERSION2_PROJID32BIT) #define XFS_SB_VERSION2_OKSASHFBITS \ (0) #define XFS_SB_VERSION2_OKREALBITS \ (XFS_SB_VERSION2_OKREALFBITS | \ XFS_SB_VERSION2_OKSASHFBITS ) /* * Sequence number values for the fields. */ typedef enum { XFS_SBS_MAGICNUM, XFS_SBS_BLOCKSIZE, XFS_SBS_DBLOCKS, XFS_SBS_RBLOCKS, XFS_SBS_REXTENTS, XFS_SBS_UUID, XFS_SBS_LOGSTART, XFS_SBS_ROOTINO, XFS_SBS_RBMINO, XFS_SBS_RSUMINO, XFS_SBS_REXTSIZE, XFS_SBS_AGBLOCKS, XFS_SBS_AGCOUNT, XFS_SBS_RBMBLOCKS, XFS_SBS_LOGBLOCKS, XFS_SBS_VERSIONNUM, XFS_SBS_SECTSIZE, XFS_SBS_INODESIZE, XFS_SBS_INOPBLOCK, XFS_SBS_FNAME, XFS_SBS_BLOCKLOG, XFS_SBS_SECTLOG, XFS_SBS_INODELOG, XFS_SBS_INOPBLOG, XFS_SBS_AGBLKLOG, XFS_SBS_REXTSLOG, XFS_SBS_INPROGRESS, XFS_SBS_IMAX_PCT, XFS_SBS_ICOUNT, XFS_SBS_IFREE, XFS_SBS_FDBLOCKS, XFS_SBS_FREXTENTS, XFS_SBS_UQUOTINO, XFS_SBS_GQUOTINO, XFS_SBS_QFLAGS, XFS_SBS_FLAGS, XFS_SBS_SHARED_VN, XFS_SBS_INOALIGNMT, XFS_SBS_UNIT, XFS_SBS_WIDTH, XFS_SBS_DIRBLKLOG, XFS_SBS_LOGSECTLOG, XFS_SBS_LOGSECTSIZE, XFS_SBS_LOGSUNIT, XFS_SBS_FEATURES2, XFS_SBS_BAD_FEATURES2, XFS_SBS_FIELDCOUNT } xfs_sb_field_t; /* * Mask values, defined based on the xfs_sb_field_t values. * Only define the ones we're using. */ #define XFS_SB_MVAL(x) (1LL << XFS_SBS_ ## x) #define XFS_SB_UUID XFS_SB_MVAL(UUID) #define XFS_SB_FNAME XFS_SB_MVAL(FNAME) #define XFS_SB_ROOTINO XFS_SB_MVAL(ROOTINO) #define XFS_SB_RBMINO XFS_SB_MVAL(RBMINO) #define XFS_SB_RSUMINO XFS_SB_MVAL(RSUMINO) #define XFS_SB_VERSIONNUM XFS_SB_MVAL(VERSIONNUM) #define XFS_SB_UQUOTINO XFS_SB_MVAL(UQUOTINO) #define XFS_SB_GQUOTINO XFS_SB_MVAL(GQUOTINO) #define XFS_SB_QFLAGS XFS_SB_MVAL(QFLAGS) #define XFS_SB_SHARED_VN XFS_SB_MVAL(SHARED_VN) #define XFS_SB_UNIT XFS_SB_MVAL(UNIT) #define XFS_SB_WIDTH XFS_SB_MVAL(WIDTH) #define XFS_SB_ICOUNT XFS_SB_MVAL(ICOUNT) #define XFS_SB_IFREE XFS_SB_MVAL(IFREE) #define XFS_SB_FDBLOCKS XFS_SB_MVAL(FDBLOCKS) #define XFS_SB_FEATURES2 XFS_SB_MVAL(FEATURES2) #define XFS_SB_BAD_FEATURES2 XFS_SB_MVAL(BAD_FEATURES2) #define XFS_SB_NUM_BITS ((int)XFS_SBS_FIELDCOUNT) #define XFS_SB_ALL_BITS ((1LL << XFS_SB_NUM_BITS) - 1) #define XFS_SB_MOD_BITS \ (XFS_SB_UUID | XFS_SB_ROOTINO | XFS_SB_RBMINO | XFS_SB_RSUMINO | \ XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | XFS_SB_GQUOTINO | \ XFS_SB_QFLAGS | XFS_SB_SHARED_VN | XFS_SB_UNIT | XFS_SB_WIDTH | \ XFS_SB_ICOUNT | XFS_SB_IFREE | XFS_SB_FDBLOCKS | XFS_SB_FEATURES2 | \ XFS_SB_BAD_FEATURES2) /* * Misc. Flags - warning - these will be cleared by xfs_repair unless * a feature bit is set when the flag is used. */ #define XFS_SBF_NOFLAGS 0x00 /* no flags set */ #define XFS_SBF_READONLY 0x01 /* only read-only mounts allowed */ /* * define max. shared version we can interoperate with */ #define XFS_SB_MAX_SHARED_VN 0 #define XFS_SB_VERSION_NUM(sbp) ((sbp)->sb_versionnum & XFS_SB_VERSION_NUMBITS) /* * end of superblock version macros */ #define XFS_SB_BLOCK(mp) XFS_HDR_BLOCK(mp, XFS_SB_DADDR) #define XFS_BUF_TO_SBP(bp) ((xfs_dsb_t *)((bp)->b_addr)) #define XFS_HDR_BLOCK(mp,d) ((xfs_agblock_t)XFS_BB_TO_FSBT(mp,d)) #define XFS_DADDR_TO_FSB(mp,d) XFS_AGB_TO_FSB(mp, \ xfs_daddr_to_agno(mp,d), xfs_daddr_to_agbno(mp,d)) #define XFS_FSB_TO_DADDR(mp,fsbno) XFS_AGB_TO_DADDR(mp, \ XFS_FSB_TO_AGNO(mp,fsbno), XFS_FSB_TO_AGBNO(mp,fsbno)) /* * File system sector to basic block conversions. */ #define XFS_FSS_TO_BB(mp,sec) ((sec) << (mp)->m_sectbb_log) /* * File system block to basic block conversions. */ #define XFS_FSB_TO_BB(mp,fsbno) ((fsbno) << (mp)->m_blkbb_log) #define XFS_BB_TO_FSB(mp,bb) \ (((bb) + (XFS_FSB_TO_BB(mp,1) - 1)) >> (mp)->m_blkbb_log) #define XFS_BB_TO_FSBT(mp,bb) ((bb) >> (mp)->m_blkbb_log) /* * File system block to byte conversions. */ #define XFS_FSB_TO_B(mp,fsbno) ((xfs_fsize_t)(fsbno) << (mp)->m_sb.sb_blocklog) #define XFS_B_TO_FSB(mp,b) \ ((((uint64_t)(b)) + (mp)->m_blockmask) >> (mp)->m_sb.sb_blocklog) #define XFS_B_TO_FSBT(mp,b) (((uint64_t)(b)) >> (mp)->m_sb.sb_blocklog) #define XFS_B_FSB_OFFSET(mp,b) ((b) & (mp)->m_blockmask) #endif /* XFS_SB_H_ */