621 lines
22 KiB
C
621 lines
22 KiB
C
/*
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* Copyright (c) 2000-2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef __XFS_SB_H__
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#define __XFS_SB_H__
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/*
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* Super block
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* Fits into a sector-sized buffer at address 0 of each allocation group.
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* Only the first of these is ever updated except during growfs.
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*/
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struct xfs_buf;
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struct xfs_mount;
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struct xfs_trans;
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#define XFS_SB_MAGIC 0x58465342 /* 'XFSB' */
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#define XFS_SB_VERSION_1 1 /* 5.3, 6.0.1, 6.1 */
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#define XFS_SB_VERSION_2 2 /* 6.2 - attributes */
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#define XFS_SB_VERSION_3 3 /* 6.2 - new inode version */
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#define XFS_SB_VERSION_4 4 /* 6.2+ - bitmask version */
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#define XFS_SB_VERSION_5 5 /* CRC enabled filesystem */
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#define XFS_SB_VERSION_NUMBITS 0x000f
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#define XFS_SB_VERSION_ALLFBITS 0xfff0
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#define XFS_SB_VERSION_ATTRBIT 0x0010
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#define XFS_SB_VERSION_NLINKBIT 0x0020
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#define XFS_SB_VERSION_QUOTABIT 0x0040
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#define XFS_SB_VERSION_ALIGNBIT 0x0080
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#define XFS_SB_VERSION_DALIGNBIT 0x0100
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#define XFS_SB_VERSION_SHAREDBIT 0x0200
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#define XFS_SB_VERSION_LOGV2BIT 0x0400
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#define XFS_SB_VERSION_SECTORBIT 0x0800
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#define XFS_SB_VERSION_EXTFLGBIT 0x1000
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#define XFS_SB_VERSION_DIRV2BIT 0x2000
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#define XFS_SB_VERSION_BORGBIT 0x4000 /* ASCII only case-insens. */
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#define XFS_SB_VERSION_MOREBITSBIT 0x8000
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/*
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* Supported feature bit list is just all bits in the versionnum field because
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* we've used them all up and understand them all. Except, of course, for the
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* shared superblock bit, which nobody knows what it does and so is unsupported.
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*/
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#define XFS_SB_VERSION_OKBITS \
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((XFS_SB_VERSION_NUMBITS | XFS_SB_VERSION_ALLFBITS) & \
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~XFS_SB_VERSION_SHAREDBIT)
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/*
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* There are two words to hold XFS "feature" bits: the original
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* word, sb_versionnum, and sb_features2. Whenever a bit is set in
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* sb_features2, the feature bit XFS_SB_VERSION_MOREBITSBIT must be set.
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*
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* These defines represent bits in sb_features2.
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*/
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#define XFS_SB_VERSION2_RESERVED1BIT 0x00000001
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#define XFS_SB_VERSION2_LAZYSBCOUNTBIT 0x00000002 /* Superblk counters */
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#define XFS_SB_VERSION2_RESERVED4BIT 0x00000004
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#define XFS_SB_VERSION2_ATTR2BIT 0x00000008 /* Inline attr rework */
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#define XFS_SB_VERSION2_PARENTBIT 0x00000010 /* parent pointers */
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#define XFS_SB_VERSION2_PROJID32BIT 0x00000080 /* 32 bit project id */
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#define XFS_SB_VERSION2_CRCBIT 0x00000100 /* metadata CRCs */
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#define XFS_SB_VERSION2_FTYPE 0x00000200 /* inode type in dir */
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#define XFS_SB_VERSION2_OKBITS \
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(XFS_SB_VERSION2_LAZYSBCOUNTBIT | \
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XFS_SB_VERSION2_ATTR2BIT | \
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XFS_SB_VERSION2_PROJID32BIT | \
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XFS_SB_VERSION2_FTYPE)
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/*
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* Superblock - in core version. Must match the ondisk version below.
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* Must be padded to 64 bit alignment.
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*/
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typedef struct xfs_sb {
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__uint32_t sb_magicnum; /* magic number == XFS_SB_MAGIC */
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__uint32_t sb_blocksize; /* logical block size, bytes */
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xfs_rfsblock_t sb_dblocks; /* number of data blocks */
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xfs_rfsblock_t sb_rblocks; /* number of realtime blocks */
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xfs_rtblock_t sb_rextents; /* number of realtime extents */
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uuid_t sb_uuid; /* file system unique id */
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xfs_fsblock_t sb_logstart; /* starting block of log if internal */
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xfs_ino_t sb_rootino; /* root inode number */
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xfs_ino_t sb_rbmino; /* bitmap inode for realtime extents */
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xfs_ino_t sb_rsumino; /* summary inode for rt bitmap */
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xfs_agblock_t sb_rextsize; /* realtime extent size, blocks */
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xfs_agblock_t sb_agblocks; /* size of an allocation group */
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xfs_agnumber_t sb_agcount; /* number of allocation groups */
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xfs_extlen_t sb_rbmblocks; /* number of rt bitmap blocks */
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xfs_extlen_t sb_logblocks; /* number of log blocks */
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__uint16_t sb_versionnum; /* header version == XFS_SB_VERSION */
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__uint16_t sb_sectsize; /* volume sector size, bytes */
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__uint16_t sb_inodesize; /* inode size, bytes */
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__uint16_t sb_inopblock; /* inodes per block */
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char sb_fname[12]; /* file system name */
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__uint8_t sb_blocklog; /* log2 of sb_blocksize */
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__uint8_t sb_sectlog; /* log2 of sb_sectsize */
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__uint8_t sb_inodelog; /* log2 of sb_inodesize */
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__uint8_t sb_inopblog; /* log2 of sb_inopblock */
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__uint8_t sb_agblklog; /* log2 of sb_agblocks (rounded up) */
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__uint8_t sb_rextslog; /* log2 of sb_rextents */
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__uint8_t sb_inprogress; /* mkfs is in progress, don't mount */
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__uint8_t sb_imax_pct; /* max % of fs for inode space */
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/* statistics */
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/*
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* These fields must remain contiguous. If you really
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* want to change their layout, make sure you fix the
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* code in xfs_trans_apply_sb_deltas().
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*/
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__uint64_t sb_icount; /* allocated inodes */
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__uint64_t sb_ifree; /* free inodes */
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__uint64_t sb_fdblocks; /* free data blocks */
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__uint64_t sb_frextents; /* free realtime extents */
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/*
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* End contiguous fields.
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*/
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xfs_ino_t sb_uquotino; /* user quota inode */
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xfs_ino_t sb_gquotino; /* group quota inode */
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__uint16_t sb_qflags; /* quota flags */
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__uint8_t sb_flags; /* misc. flags */
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__uint8_t sb_shared_vn; /* shared version number */
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xfs_extlen_t sb_inoalignmt; /* inode chunk alignment, fsblocks */
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__uint32_t sb_unit; /* stripe or raid unit */
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__uint32_t sb_width; /* stripe or raid width */
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__uint8_t sb_dirblklog; /* log2 of dir block size (fsbs) */
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__uint8_t sb_logsectlog; /* log2 of the log sector size */
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__uint16_t sb_logsectsize; /* sector size for the log, bytes */
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__uint32_t sb_logsunit; /* stripe unit size for the log */
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__uint32_t sb_features2; /* additional feature bits */
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/*
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* bad features2 field as a result of failing to pad the sb
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* structure to 64 bits. Some machines will be using this field
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* for features2 bits. Easiest just to mark it bad and not use
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* it for anything else.
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*/
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__uint32_t sb_bad_features2;
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/* version 5 superblock fields start here */
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/* feature masks */
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__uint32_t sb_features_compat;
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__uint32_t sb_features_ro_compat;
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__uint32_t sb_features_incompat;
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__uint32_t sb_features_log_incompat;
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__uint32_t sb_crc; /* superblock crc */
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__uint32_t sb_pad;
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xfs_ino_t sb_pquotino; /* project quota inode */
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xfs_lsn_t sb_lsn; /* last write sequence */
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/* must be padded to 64 bit alignment */
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} xfs_sb_t;
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#define XFS_SB_CRC_OFF offsetof(struct xfs_sb, sb_crc)
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/*
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* Superblock - on disk version. Must match the in core version above.
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* Must be padded to 64 bit alignment.
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*/
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typedef struct xfs_dsb {
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__be32 sb_magicnum; /* magic number == XFS_SB_MAGIC */
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__be32 sb_blocksize; /* logical block size, bytes */
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__be64 sb_dblocks; /* number of data blocks */
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__be64 sb_rblocks; /* number of realtime blocks */
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__be64 sb_rextents; /* number of realtime extents */
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uuid_t sb_uuid; /* file system unique id */
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__be64 sb_logstart; /* starting block of log if internal */
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__be64 sb_rootino; /* root inode number */
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__be64 sb_rbmino; /* bitmap inode for realtime extents */
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__be64 sb_rsumino; /* summary inode for rt bitmap */
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__be32 sb_rextsize; /* realtime extent size, blocks */
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__be32 sb_agblocks; /* size of an allocation group */
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__be32 sb_agcount; /* number of allocation groups */
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__be32 sb_rbmblocks; /* number of rt bitmap blocks */
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__be32 sb_logblocks; /* number of log blocks */
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__be16 sb_versionnum; /* header version == XFS_SB_VERSION */
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__be16 sb_sectsize; /* volume sector size, bytes */
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__be16 sb_inodesize; /* inode size, bytes */
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__be16 sb_inopblock; /* inodes per block */
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char sb_fname[12]; /* file system name */
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__u8 sb_blocklog; /* log2 of sb_blocksize */
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__u8 sb_sectlog; /* log2 of sb_sectsize */
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__u8 sb_inodelog; /* log2 of sb_inodesize */
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__u8 sb_inopblog; /* log2 of sb_inopblock */
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__u8 sb_agblklog; /* log2 of sb_agblocks (rounded up) */
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__u8 sb_rextslog; /* log2 of sb_rextents */
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__u8 sb_inprogress; /* mkfs is in progress, don't mount */
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__u8 sb_imax_pct; /* max % of fs for inode space */
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/* statistics */
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/*
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* These fields must remain contiguous. If you really
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* want to change their layout, make sure you fix the
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* code in xfs_trans_apply_sb_deltas().
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*/
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__be64 sb_icount; /* allocated inodes */
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__be64 sb_ifree; /* free inodes */
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__be64 sb_fdblocks; /* free data blocks */
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__be64 sb_frextents; /* free realtime extents */
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/*
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* End contiguous fields.
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*/
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__be64 sb_uquotino; /* user quota inode */
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__be64 sb_gquotino; /* group quota inode */
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__be16 sb_qflags; /* quota flags */
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__u8 sb_flags; /* misc. flags */
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__u8 sb_shared_vn; /* shared version number */
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__be32 sb_inoalignmt; /* inode chunk alignment, fsblocks */
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__be32 sb_unit; /* stripe or raid unit */
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__be32 sb_width; /* stripe or raid width */
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__u8 sb_dirblklog; /* log2 of dir block size (fsbs) */
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__u8 sb_logsectlog; /* log2 of the log sector size */
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__be16 sb_logsectsize; /* sector size for the log, bytes */
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__be32 sb_logsunit; /* stripe unit size for the log */
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__be32 sb_features2; /* additional feature bits */
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/*
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* bad features2 field as a result of failing to pad the sb
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* structure to 64 bits. Some machines will be using this field
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* for features2 bits. Easiest just to mark it bad and not use
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* it for anything else.
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*/
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__be32 sb_bad_features2;
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/* version 5 superblock fields start here */
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/* feature masks */
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__be32 sb_features_compat;
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__be32 sb_features_ro_compat;
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__be32 sb_features_incompat;
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__be32 sb_features_log_incompat;
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__le32 sb_crc; /* superblock crc */
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__be32 sb_pad;
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__be64 sb_pquotino; /* project quota inode */
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__be64 sb_lsn; /* last write sequence */
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/* must be padded to 64 bit alignment */
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} xfs_dsb_t;
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/*
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* Sequence number values for the fields.
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*/
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typedef enum {
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XFS_SBS_MAGICNUM, XFS_SBS_BLOCKSIZE, XFS_SBS_DBLOCKS, XFS_SBS_RBLOCKS,
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XFS_SBS_REXTENTS, XFS_SBS_UUID, XFS_SBS_LOGSTART, XFS_SBS_ROOTINO,
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XFS_SBS_RBMINO, XFS_SBS_RSUMINO, XFS_SBS_REXTSIZE, XFS_SBS_AGBLOCKS,
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XFS_SBS_AGCOUNT, XFS_SBS_RBMBLOCKS, XFS_SBS_LOGBLOCKS,
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XFS_SBS_VERSIONNUM, XFS_SBS_SECTSIZE, XFS_SBS_INODESIZE,
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XFS_SBS_INOPBLOCK, XFS_SBS_FNAME, XFS_SBS_BLOCKLOG,
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XFS_SBS_SECTLOG, XFS_SBS_INODELOG, XFS_SBS_INOPBLOG, XFS_SBS_AGBLKLOG,
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XFS_SBS_REXTSLOG, XFS_SBS_INPROGRESS, XFS_SBS_IMAX_PCT, XFS_SBS_ICOUNT,
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XFS_SBS_IFREE, XFS_SBS_FDBLOCKS, XFS_SBS_FREXTENTS, XFS_SBS_UQUOTINO,
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XFS_SBS_GQUOTINO, XFS_SBS_QFLAGS, XFS_SBS_FLAGS, XFS_SBS_SHARED_VN,
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XFS_SBS_INOALIGNMT, XFS_SBS_UNIT, XFS_SBS_WIDTH, XFS_SBS_DIRBLKLOG,
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XFS_SBS_LOGSECTLOG, XFS_SBS_LOGSECTSIZE, XFS_SBS_LOGSUNIT,
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XFS_SBS_FEATURES2, XFS_SBS_BAD_FEATURES2, XFS_SBS_FEATURES_COMPAT,
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XFS_SBS_FEATURES_RO_COMPAT, XFS_SBS_FEATURES_INCOMPAT,
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XFS_SBS_FEATURES_LOG_INCOMPAT, XFS_SBS_CRC, XFS_SBS_PAD,
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XFS_SBS_PQUOTINO, XFS_SBS_LSN,
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XFS_SBS_FIELDCOUNT
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} xfs_sb_field_t;
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/*
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* Mask values, defined based on the xfs_sb_field_t values.
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* Only define the ones we're using.
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*/
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#define XFS_SB_MVAL(x) (1LL << XFS_SBS_ ## x)
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#define XFS_SB_UUID XFS_SB_MVAL(UUID)
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#define XFS_SB_FNAME XFS_SB_MVAL(FNAME)
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#define XFS_SB_ROOTINO XFS_SB_MVAL(ROOTINO)
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#define XFS_SB_RBMINO XFS_SB_MVAL(RBMINO)
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#define XFS_SB_RSUMINO XFS_SB_MVAL(RSUMINO)
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#define XFS_SB_VERSIONNUM XFS_SB_MVAL(VERSIONNUM)
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#define XFS_SB_UQUOTINO XFS_SB_MVAL(UQUOTINO)
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#define XFS_SB_GQUOTINO XFS_SB_MVAL(GQUOTINO)
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#define XFS_SB_QFLAGS XFS_SB_MVAL(QFLAGS)
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#define XFS_SB_SHARED_VN XFS_SB_MVAL(SHARED_VN)
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#define XFS_SB_UNIT XFS_SB_MVAL(UNIT)
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#define XFS_SB_WIDTH XFS_SB_MVAL(WIDTH)
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#define XFS_SB_ICOUNT XFS_SB_MVAL(ICOUNT)
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#define XFS_SB_IFREE XFS_SB_MVAL(IFREE)
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#define XFS_SB_FDBLOCKS XFS_SB_MVAL(FDBLOCKS)
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#define XFS_SB_FEATURES2 XFS_SB_MVAL(FEATURES2)
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#define XFS_SB_BAD_FEATURES2 XFS_SB_MVAL(BAD_FEATURES2)
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#define XFS_SB_FEATURES_COMPAT XFS_SB_MVAL(FEATURES_COMPAT)
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#define XFS_SB_FEATURES_RO_COMPAT XFS_SB_MVAL(FEATURES_RO_COMPAT)
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#define XFS_SB_FEATURES_INCOMPAT XFS_SB_MVAL(FEATURES_INCOMPAT)
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#define XFS_SB_FEATURES_LOG_INCOMPAT XFS_SB_MVAL(FEATURES_LOG_INCOMPAT)
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#define XFS_SB_CRC XFS_SB_MVAL(CRC)
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#define XFS_SB_PQUOTINO XFS_SB_MVAL(PQUOTINO)
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#define XFS_SB_NUM_BITS ((int)XFS_SBS_FIELDCOUNT)
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#define XFS_SB_ALL_BITS ((1LL << XFS_SB_NUM_BITS) - 1)
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#define XFS_SB_MOD_BITS \
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(XFS_SB_UUID | XFS_SB_ROOTINO | XFS_SB_RBMINO | XFS_SB_RSUMINO | \
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XFS_SB_VERSIONNUM | XFS_SB_UQUOTINO | XFS_SB_GQUOTINO | \
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XFS_SB_QFLAGS | XFS_SB_SHARED_VN | XFS_SB_UNIT | XFS_SB_WIDTH | \
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XFS_SB_ICOUNT | XFS_SB_IFREE | XFS_SB_FDBLOCKS | XFS_SB_FEATURES2 | \
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XFS_SB_BAD_FEATURES2 | XFS_SB_FEATURES_COMPAT | \
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XFS_SB_FEATURES_RO_COMPAT | XFS_SB_FEATURES_INCOMPAT | \
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XFS_SB_FEATURES_LOG_INCOMPAT | XFS_SB_PQUOTINO)
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/*
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* Misc. Flags - warning - these will be cleared by xfs_repair unless
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* a feature bit is set when the flag is used.
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*/
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#define XFS_SBF_NOFLAGS 0x00 /* no flags set */
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#define XFS_SBF_READONLY 0x01 /* only read-only mounts allowed */
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/*
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* define max. shared version we can interoperate with
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*/
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#define XFS_SB_MAX_SHARED_VN 0
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#define XFS_SB_VERSION_NUM(sbp) ((sbp)->sb_versionnum & XFS_SB_VERSION_NUMBITS)
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/*
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* The first XFS version we support is a v4 superblock with V2 directories.
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*/
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static inline bool xfs_sb_good_v4_features(struct xfs_sb *sbp)
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{
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if (!(sbp->sb_versionnum & XFS_SB_VERSION_DIRV2BIT))
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return false;
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/* check for unknown features in the fs */
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if ((sbp->sb_versionnum & ~XFS_SB_VERSION_OKBITS) ||
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((sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT) &&
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(sbp->sb_features2 & ~XFS_SB_VERSION2_OKBITS)))
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return false;
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return true;
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}
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static inline bool xfs_sb_good_version(struct xfs_sb *sbp)
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{
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if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5)
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return true;
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if (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_4)
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return xfs_sb_good_v4_features(sbp);
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return false;
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}
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/*
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* Detect a mismatched features2 field. Older kernels read/wrote
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* this into the wrong slot, so to be safe we keep them in sync.
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*/
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static inline bool xfs_sb_has_mismatched_features2(struct xfs_sb *sbp)
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{
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return sbp->sb_bad_features2 != sbp->sb_features2;
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}
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static inline bool xfs_sb_version_hasattr(struct xfs_sb *sbp)
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{
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return (sbp->sb_versionnum & XFS_SB_VERSION_ATTRBIT);
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}
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static inline void xfs_sb_version_addattr(struct xfs_sb *sbp)
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{
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sbp->sb_versionnum |= XFS_SB_VERSION_ATTRBIT;
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}
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static inline bool xfs_sb_version_hasquota(struct xfs_sb *sbp)
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{
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return (sbp->sb_versionnum & XFS_SB_VERSION_QUOTABIT);
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}
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static inline void xfs_sb_version_addquota(struct xfs_sb *sbp)
|
|
{
|
|
sbp->sb_versionnum |= XFS_SB_VERSION_QUOTABIT;
|
|
}
|
|
|
|
static inline bool xfs_sb_version_hasalign(struct xfs_sb *sbp)
|
|
{
|
|
return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 ||
|
|
(sbp->sb_versionnum & XFS_SB_VERSION_ALIGNBIT));
|
|
}
|
|
|
|
static inline bool xfs_sb_version_hasdalign(struct xfs_sb *sbp)
|
|
{
|
|
return (sbp->sb_versionnum & XFS_SB_VERSION_DALIGNBIT);
|
|
}
|
|
|
|
static inline bool xfs_sb_version_haslogv2(struct xfs_sb *sbp)
|
|
{
|
|
return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 ||
|
|
(sbp->sb_versionnum & XFS_SB_VERSION_LOGV2BIT);
|
|
}
|
|
|
|
static inline bool xfs_sb_version_hasextflgbit(struct xfs_sb *sbp)
|
|
{
|
|
return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 ||
|
|
(sbp->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT);
|
|
}
|
|
|
|
static inline bool xfs_sb_version_hassector(struct xfs_sb *sbp)
|
|
{
|
|
return (sbp->sb_versionnum & XFS_SB_VERSION_SECTORBIT);
|
|
}
|
|
|
|
static inline bool xfs_sb_version_hasasciici(struct xfs_sb *sbp)
|
|
{
|
|
return (sbp->sb_versionnum & XFS_SB_VERSION_BORGBIT);
|
|
}
|
|
|
|
static inline bool xfs_sb_version_hasmorebits(struct xfs_sb *sbp)
|
|
{
|
|
return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 ||
|
|
(sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT);
|
|
}
|
|
|
|
/*
|
|
* sb_features2 bit version macros.
|
|
*/
|
|
static inline bool xfs_sb_version_haslazysbcount(struct xfs_sb *sbp)
|
|
{
|
|
return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
|
|
(xfs_sb_version_hasmorebits(sbp) &&
|
|
(sbp->sb_features2 & XFS_SB_VERSION2_LAZYSBCOUNTBIT));
|
|
}
|
|
|
|
static inline bool xfs_sb_version_hasattr2(struct xfs_sb *sbp)
|
|
{
|
|
return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
|
|
(xfs_sb_version_hasmorebits(sbp) &&
|
|
(sbp->sb_features2 & XFS_SB_VERSION2_ATTR2BIT));
|
|
}
|
|
|
|
static inline void xfs_sb_version_addattr2(struct xfs_sb *sbp)
|
|
{
|
|
sbp->sb_versionnum |= XFS_SB_VERSION_MOREBITSBIT;
|
|
sbp->sb_features2 |= XFS_SB_VERSION2_ATTR2BIT;
|
|
sbp->sb_bad_features2 |= XFS_SB_VERSION2_ATTR2BIT;
|
|
}
|
|
|
|
static inline void xfs_sb_version_removeattr2(struct xfs_sb *sbp)
|
|
{
|
|
sbp->sb_features2 &= ~XFS_SB_VERSION2_ATTR2BIT;
|
|
sbp->sb_bad_features2 &= ~XFS_SB_VERSION2_ATTR2BIT;
|
|
if (!sbp->sb_features2)
|
|
sbp->sb_versionnum &= ~XFS_SB_VERSION_MOREBITSBIT;
|
|
}
|
|
|
|
static inline bool xfs_sb_version_hasprojid32bit(struct xfs_sb *sbp)
|
|
{
|
|
return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) ||
|
|
(xfs_sb_version_hasmorebits(sbp) &&
|
|
(sbp->sb_features2 & XFS_SB_VERSION2_PROJID32BIT));
|
|
}
|
|
|
|
static inline void xfs_sb_version_addprojid32bit(struct xfs_sb *sbp)
|
|
{
|
|
sbp->sb_versionnum |= XFS_SB_VERSION_MOREBITSBIT;
|
|
sbp->sb_features2 |= XFS_SB_VERSION2_PROJID32BIT;
|
|
sbp->sb_bad_features2 |= XFS_SB_VERSION2_PROJID32BIT;
|
|
}
|
|
|
|
/*
|
|
* Extended v5 superblock feature masks. These are to be used for new v5
|
|
* superblock features only.
|
|
*
|
|
* Compat features are new features that old kernels will not notice or affect
|
|
* and so can mount read-write without issues.
|
|
*
|
|
* RO-Compat (read only) are features that old kernels can read but will break
|
|
* if they write. Hence only read-only mounts of such filesystems are allowed on
|
|
* kernels that don't support the feature bit.
|
|
*
|
|
* InCompat features are features which old kernels will not understand and so
|
|
* must not mount.
|
|
*
|
|
* Log-InCompat features are for changes to log formats or new transactions that
|
|
* can't be replayed on older kernels. The fields are set when the filesystem is
|
|
* mounted, and a clean unmount clears the fields.
|
|
*/
|
|
#define XFS_SB_FEAT_COMPAT_ALL 0
|
|
#define XFS_SB_FEAT_COMPAT_UNKNOWN ~XFS_SB_FEAT_COMPAT_ALL
|
|
static inline bool
|
|
xfs_sb_has_compat_feature(
|
|
struct xfs_sb *sbp,
|
|
__uint32_t feature)
|
|
{
|
|
return (sbp->sb_features_compat & feature) != 0;
|
|
}
|
|
|
|
#define XFS_SB_FEAT_RO_COMPAT_FINOBT (1 << 0) /* free inode btree */
|
|
#define XFS_SB_FEAT_RO_COMPAT_ALL \
|
|
(XFS_SB_FEAT_RO_COMPAT_FINOBT)
|
|
#define XFS_SB_FEAT_RO_COMPAT_UNKNOWN ~XFS_SB_FEAT_RO_COMPAT_ALL
|
|
static inline bool
|
|
xfs_sb_has_ro_compat_feature(
|
|
struct xfs_sb *sbp,
|
|
__uint32_t feature)
|
|
{
|
|
return (sbp->sb_features_ro_compat & feature) != 0;
|
|
}
|
|
|
|
#define XFS_SB_FEAT_INCOMPAT_FTYPE (1 << 0) /* filetype in dirent */
|
|
#define XFS_SB_FEAT_INCOMPAT_ALL \
|
|
(XFS_SB_FEAT_INCOMPAT_FTYPE)
|
|
|
|
#define XFS_SB_FEAT_INCOMPAT_UNKNOWN ~XFS_SB_FEAT_INCOMPAT_ALL
|
|
static inline bool
|
|
xfs_sb_has_incompat_feature(
|
|
struct xfs_sb *sbp,
|
|
__uint32_t feature)
|
|
{
|
|
return (sbp->sb_features_incompat & feature) != 0;
|
|
}
|
|
|
|
#define XFS_SB_FEAT_INCOMPAT_LOG_ALL 0
|
|
#define XFS_SB_FEAT_INCOMPAT_LOG_UNKNOWN ~XFS_SB_FEAT_INCOMPAT_LOG_ALL
|
|
static inline bool
|
|
xfs_sb_has_incompat_log_feature(
|
|
struct xfs_sb *sbp,
|
|
__uint32_t feature)
|
|
{
|
|
return (sbp->sb_features_log_incompat & feature) != 0;
|
|
}
|
|
|
|
/*
|
|
* V5 superblock specific feature checks
|
|
*/
|
|
static inline int xfs_sb_version_hascrc(struct xfs_sb *sbp)
|
|
{
|
|
return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5;
|
|
}
|
|
|
|
static inline int xfs_sb_version_has_pquotino(struct xfs_sb *sbp)
|
|
{
|
|
return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5;
|
|
}
|
|
|
|
static inline int xfs_sb_version_hasftype(struct xfs_sb *sbp)
|
|
{
|
|
return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 &&
|
|
xfs_sb_has_incompat_feature(sbp, XFS_SB_FEAT_INCOMPAT_FTYPE)) ||
|
|
(xfs_sb_version_hasmorebits(sbp) &&
|
|
(sbp->sb_features2 & XFS_SB_VERSION2_FTYPE));
|
|
}
|
|
|
|
static inline int xfs_sb_version_hasfinobt(xfs_sb_t *sbp)
|
|
{
|
|
return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) &&
|
|
(sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_FINOBT);
|
|
}
|
|
|
|
/*
|
|
* end of superblock version macros
|
|
*/
|
|
|
|
static inline bool
|
|
xfs_is_quota_inode(struct xfs_sb *sbp, xfs_ino_t ino)
|
|
{
|
|
return (ino == sbp->sb_uquotino ||
|
|
ino == sbp->sb_gquotino ||
|
|
ino == sbp->sb_pquotino);
|
|
}
|
|
|
|
#define XFS_SB_DADDR ((xfs_daddr_t)0) /* daddr in filesystem/ag */
|
|
#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)
|
|
|
|
/*
|
|
* perag get/put wrappers for ref counting
|
|
*/
|
|
extern struct xfs_perag *xfs_perag_get(struct xfs_mount *, xfs_agnumber_t);
|
|
extern struct xfs_perag *xfs_perag_get_tag(struct xfs_mount *, xfs_agnumber_t,
|
|
int tag);
|
|
extern void xfs_perag_put(struct xfs_perag *pag);
|
|
extern int xfs_initialize_perag_data(struct xfs_mount *, xfs_agnumber_t);
|
|
|
|
extern void xfs_sb_calc_crc(struct xfs_buf *);
|
|
extern void xfs_mod_sb(struct xfs_trans *, __int64_t);
|
|
extern void xfs_sb_mount_common(struct xfs_mount *, struct xfs_sb *);
|
|
extern void xfs_sb_from_disk(struct xfs_sb *, struct xfs_dsb *);
|
|
extern void xfs_sb_to_disk(struct xfs_dsb *, struct xfs_sb *, __int64_t);
|
|
extern void xfs_sb_quota_from_disk(struct xfs_sb *sbp);
|
|
|
|
#endif /* __XFS_SB_H__ */
|