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1934 lines
65 KiB
1934 lines
65 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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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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#ifndef __XFS_FORMAT_H__ |
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#define __XFS_FORMAT_H__ |
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/* |
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* XFS On Disk Format Definitions |
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* |
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* This header file defines all the on-disk format definitions for |
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* general XFS objects. Directory and attribute related objects are defined in |
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* xfs_da_format.h, which log and log item formats are defined in |
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* xfs_log_format.h. Everything else goes here. |
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*/ |
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struct xfs_mount; |
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struct xfs_trans; |
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struct xfs_inode; |
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struct xfs_buf; |
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struct xfs_ifork; |
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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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#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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* The size of a single extended attribute on disk is limited by |
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* the size of index values within the attribute entries themselves. |
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* These are be16 fields, so we can only support attribute data |
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* sizes up to 2^16 bytes in length. |
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*/ |
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#define XFS_XATTR_SIZE_MAX (1 << 16) |
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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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/* Maximum size of the xfs filesystem label, no terminating NULL */ |
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#define XFSLABEL_MAX 12 |
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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; /* user-visible 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[XFSLABEL_MAX]; /* 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 structure to |
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* 64 bits. Some machines will be using this field for features2 bits. |
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* Easiest just to mark it bad and not use it for anything else. |
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* |
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* This is not kept up to date in memory; it is always overwritten by |
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* the value in sb_features2 when formatting the incore superblock to |
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* the disk buffer. |
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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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xfs_extlen_t sb_spino_align; /* sparse inode chunk alignment */ |
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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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uuid_t sb_meta_uuid; /* metadata file system unique id */ |
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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; /* user-visible 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[XFSLABEL_MAX]; /* 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_spino_align; /* sparse inode chunk alignment */ |
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__be64 sb_pquotino; /* project quota inode */ |
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__be64 sb_lsn; /* last write sequence */ |
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uuid_t sb_meta_uuid; /* metadata file system unique id */ |
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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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* 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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if (!(sbp->sb_versionnum & XFS_SB_VERSION_EXTFLGBIT)) |
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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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static inline bool xfs_sb_version_hasrealtime(struct xfs_sb *sbp) |
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{ |
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return sbp->sb_rblocks > 0; |
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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) |
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{ |
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sbp->sb_versionnum |= XFS_SB_VERSION_QUOTABIT; |
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} |
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static inline bool xfs_sb_version_hasalign(struct xfs_sb *sbp) |
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{ |
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return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 || |
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(sbp->sb_versionnum & XFS_SB_VERSION_ALIGNBIT)); |
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} |
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static inline bool xfs_sb_version_hasdalign(struct xfs_sb *sbp) |
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{ |
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return (sbp->sb_versionnum & XFS_SB_VERSION_DALIGNBIT); |
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} |
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static inline bool xfs_sb_version_haslogv2(struct xfs_sb *sbp) |
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{ |
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return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 || |
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(sbp->sb_versionnum & XFS_SB_VERSION_LOGV2BIT); |
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} |
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static inline bool xfs_sb_version_hassector(struct xfs_sb *sbp) |
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{ |
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return (sbp->sb_versionnum & XFS_SB_VERSION_SECTORBIT); |
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} |
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static inline bool xfs_sb_version_hasasciici(struct xfs_sb *sbp) |
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{ |
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return (sbp->sb_versionnum & XFS_SB_VERSION_BORGBIT); |
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} |
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static inline bool xfs_sb_version_hasmorebits(struct xfs_sb *sbp) |
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{ |
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return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 || |
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(sbp->sb_versionnum & XFS_SB_VERSION_MOREBITSBIT); |
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} |
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/* |
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* sb_features2 bit version macros. |
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*/ |
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static inline bool xfs_sb_version_haslazysbcount(struct xfs_sb *sbp) |
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{ |
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return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) || |
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(xfs_sb_version_hasmorebits(sbp) && |
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(sbp->sb_features2 & XFS_SB_VERSION2_LAZYSBCOUNTBIT)); |
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} |
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static inline bool xfs_sb_version_hasattr2(struct xfs_sb *sbp) |
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{ |
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return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) || |
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(xfs_sb_version_hasmorebits(sbp) && |
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(sbp->sb_features2 & XFS_SB_VERSION2_ATTR2BIT)); |
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} |
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static inline void xfs_sb_version_addattr2(struct xfs_sb *sbp) |
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{ |
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sbp->sb_versionnum |= XFS_SB_VERSION_MOREBITSBIT; |
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sbp->sb_features2 |= XFS_SB_VERSION2_ATTR2BIT; |
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} |
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static inline void xfs_sb_version_removeattr2(struct xfs_sb *sbp) |
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{ |
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sbp->sb_features2 &= ~XFS_SB_VERSION2_ATTR2BIT; |
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if (!sbp->sb_features2) |
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sbp->sb_versionnum &= ~XFS_SB_VERSION_MOREBITSBIT; |
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} |
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static inline bool xfs_sb_version_hasprojid32bit(struct xfs_sb *sbp) |
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{ |
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return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) || |
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(xfs_sb_version_hasmorebits(sbp) && |
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(sbp->sb_features2 & XFS_SB_VERSION2_PROJID32BIT)); |
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} |
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static inline void xfs_sb_version_addprojid32bit(struct xfs_sb *sbp) |
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{ |
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sbp->sb_versionnum |= XFS_SB_VERSION_MOREBITSBIT; |
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sbp->sb_features2 |= XFS_SB_VERSION2_PROJID32BIT; |
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} |
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/* |
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* Extended v5 superblock feature masks. These are to be used for new v5 |
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* superblock features only. |
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* |
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* Compat features are new features that old kernels will not notice or affect |
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* and so can mount read-write without issues. |
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* |
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* RO-Compat (read only) are features that old kernels can read but will break |
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* if they write. Hence only read-only mounts of such filesystems are allowed on |
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* kernels that don't support the feature bit. |
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* |
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* InCompat features are features which old kernels will not understand and so |
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* must not mount. |
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* |
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* Log-InCompat features are for changes to log formats or new transactions that |
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* can't be replayed on older kernels. The fields are set when the filesystem is |
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* mounted, and a clean unmount clears the fields. |
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*/ |
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#define XFS_SB_FEAT_COMPAT_ALL 0 |
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#define XFS_SB_FEAT_COMPAT_UNKNOWN ~XFS_SB_FEAT_COMPAT_ALL |
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static inline bool |
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xfs_sb_has_compat_feature( |
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struct xfs_sb *sbp, |
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uint32_t feature) |
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{ |
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return (sbp->sb_features_compat & feature) != 0; |
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} |
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#define XFS_SB_FEAT_RO_COMPAT_FINOBT (1 << 0) /* free inode btree */ |
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#define XFS_SB_FEAT_RO_COMPAT_RMAPBT (1 << 1) /* reverse map btree */ |
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#define XFS_SB_FEAT_RO_COMPAT_REFLINK (1 << 2) /* reflinked files */ |
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#define XFS_SB_FEAT_RO_COMPAT_INOBTCNT (1 << 3) /* inobt block counts */ |
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#define XFS_SB_FEAT_RO_COMPAT_ALL \ |
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(XFS_SB_FEAT_RO_COMPAT_FINOBT | \ |
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XFS_SB_FEAT_RO_COMPAT_RMAPBT | \ |
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XFS_SB_FEAT_RO_COMPAT_REFLINK| \ |
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XFS_SB_FEAT_RO_COMPAT_INOBTCNT) |
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#define XFS_SB_FEAT_RO_COMPAT_UNKNOWN ~XFS_SB_FEAT_RO_COMPAT_ALL |
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static inline bool |
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xfs_sb_has_ro_compat_feature( |
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struct xfs_sb *sbp, |
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uint32_t feature) |
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{ |
|
return (sbp->sb_features_ro_compat & feature) != 0; |
|
} |
|
|
|
#define XFS_SB_FEAT_INCOMPAT_FTYPE (1 << 0) /* filetype in dirent */ |
|
#define XFS_SB_FEAT_INCOMPAT_SPINODES (1 << 1) /* sparse inode chunks */ |
|
#define XFS_SB_FEAT_INCOMPAT_META_UUID (1 << 2) /* metadata UUID */ |
|
#define XFS_SB_FEAT_INCOMPAT_BIGTIME (1 << 3) /* large timestamps */ |
|
#define XFS_SB_FEAT_INCOMPAT_ALL \ |
|
(XFS_SB_FEAT_INCOMPAT_FTYPE| \ |
|
XFS_SB_FEAT_INCOMPAT_SPINODES| \ |
|
XFS_SB_FEAT_INCOMPAT_META_UUID| \ |
|
XFS_SB_FEAT_INCOMPAT_BIGTIME) |
|
|
|
#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 bool xfs_sb_version_hascrc(struct xfs_sb *sbp) |
|
{ |
|
return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5; |
|
} |
|
|
|
/* |
|
* v5 file systems support V3 inodes only, earlier file systems support |
|
* v2 and v1 inodes. |
|
*/ |
|
static inline bool xfs_sb_version_has_v3inode(struct xfs_sb *sbp) |
|
{ |
|
return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5; |
|
} |
|
|
|
static inline bool xfs_dinode_good_version(struct xfs_sb *sbp, |
|
uint8_t version) |
|
{ |
|
if (xfs_sb_version_has_v3inode(sbp)) |
|
return version == 3; |
|
return version == 1 || version == 2; |
|
} |
|
|
|
static inline bool 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 bool 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); |
|
} |
|
|
|
static inline bool xfs_sb_version_hassparseinodes(struct xfs_sb *sbp) |
|
{ |
|
return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 && |
|
xfs_sb_has_incompat_feature(sbp, XFS_SB_FEAT_INCOMPAT_SPINODES); |
|
} |
|
|
|
/* |
|
* XFS_SB_FEAT_INCOMPAT_META_UUID indicates that the metadata UUID |
|
* is stored separately from the user-visible UUID; this allows the |
|
* user-visible UUID to be changed on V5 filesystems which have a |
|
* filesystem UUID stamped into every piece of metadata. |
|
*/ |
|
static inline bool xfs_sb_version_hasmetauuid(struct xfs_sb *sbp) |
|
{ |
|
return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) && |
|
(sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_META_UUID); |
|
} |
|
|
|
static inline bool xfs_sb_version_hasrmapbt(struct xfs_sb *sbp) |
|
{ |
|
return (XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5) && |
|
(sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_RMAPBT); |
|
} |
|
|
|
static inline bool xfs_sb_version_hasreflink(struct xfs_sb *sbp) |
|
{ |
|
return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 && |
|
(sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_REFLINK); |
|
} |
|
|
|
static inline bool xfs_sb_version_hasbigtime(struct xfs_sb *sbp) |
|
{ |
|
return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 && |
|
(sbp->sb_features_incompat & XFS_SB_FEAT_INCOMPAT_BIGTIME); |
|
} |
|
|
|
/* |
|
* Inode btree block counter. We record the number of inobt and finobt blocks |
|
* in the AGI header so that we can skip the finobt walk at mount time when |
|
* setting up per-AG reservations. |
|
*/ |
|
static inline bool xfs_sb_version_hasinobtcounts(struct xfs_sb *sbp) |
|
{ |
|
return XFS_SB_VERSION_NUM(sbp) == XFS_SB_VERSION_5 && |
|
(sbp->sb_features_ro_compat & XFS_SB_FEAT_RO_COMPAT_INOBTCNT); |
|
} |
|
|
|
/* |
|
* 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_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) |
|
|
|
/* |
|
* Allocation group header |
|
* |
|
* This is divided into three structures, placed in sequential 512-byte |
|
* buffers after a copy of the superblock (also in a 512-byte buffer). |
|
*/ |
|
#define XFS_AGF_MAGIC 0x58414746 /* 'XAGF' */ |
|
#define XFS_AGI_MAGIC 0x58414749 /* 'XAGI' */ |
|
#define XFS_AGFL_MAGIC 0x5841464c /* 'XAFL' */ |
|
#define XFS_AGF_VERSION 1 |
|
#define XFS_AGI_VERSION 1 |
|
|
|
#define XFS_AGF_GOOD_VERSION(v) ((v) == XFS_AGF_VERSION) |
|
#define XFS_AGI_GOOD_VERSION(v) ((v) == XFS_AGI_VERSION) |
|
|
|
/* |
|
* Btree number 0 is bno, 1 is cnt, 2 is rmap. This value gives the size of the |
|
* arrays below. |
|
*/ |
|
#define XFS_BTNUM_AGF ((int)XFS_BTNUM_RMAPi + 1) |
|
|
|
/* |
|
* The second word of agf_levels in the first a.g. overlaps the EFS |
|
* superblock's magic number. Since the magic numbers valid for EFS |
|
* are > 64k, our value cannot be confused for an EFS superblock's. |
|
*/ |
|
|
|
typedef struct xfs_agf { |
|
/* |
|
* Common allocation group header information |
|
*/ |
|
__be32 agf_magicnum; /* magic number == XFS_AGF_MAGIC */ |
|
__be32 agf_versionnum; /* header version == XFS_AGF_VERSION */ |
|
__be32 agf_seqno; /* sequence # starting from 0 */ |
|
__be32 agf_length; /* size in blocks of a.g. */ |
|
/* |
|
* Freespace and rmap information |
|
*/ |
|
__be32 agf_roots[XFS_BTNUM_AGF]; /* root blocks */ |
|
__be32 agf_levels[XFS_BTNUM_AGF]; /* btree levels */ |
|
|
|
__be32 agf_flfirst; /* first freelist block's index */ |
|
__be32 agf_fllast; /* last freelist block's index */ |
|
__be32 agf_flcount; /* count of blocks in freelist */ |
|
__be32 agf_freeblks; /* total free blocks */ |
|
|
|
__be32 agf_longest; /* longest free space */ |
|
__be32 agf_btreeblks; /* # of blocks held in AGF btrees */ |
|
uuid_t agf_uuid; /* uuid of filesystem */ |
|
|
|
__be32 agf_rmap_blocks; /* rmapbt blocks used */ |
|
__be32 agf_refcount_blocks; /* refcountbt blocks used */ |
|
|
|
__be32 agf_refcount_root; /* refcount tree root block */ |
|
__be32 agf_refcount_level; /* refcount btree levels */ |
|
|
|
/* |
|
* reserve some contiguous space for future logged fields before we add |
|
* the unlogged fields. This makes the range logging via flags and |
|
* structure offsets much simpler. |
|
*/ |
|
__be64 agf_spare64[14]; |
|
|
|
/* unlogged fields, written during buffer writeback. */ |
|
__be64 agf_lsn; /* last write sequence */ |
|
__be32 agf_crc; /* crc of agf sector */ |
|
__be32 agf_spare2; |
|
|
|
/* structure must be padded to 64 bit alignment */ |
|
} xfs_agf_t; |
|
|
|
#define XFS_AGF_CRC_OFF offsetof(struct xfs_agf, agf_crc) |
|
|
|
#define XFS_AGF_MAGICNUM 0x00000001 |
|
#define XFS_AGF_VERSIONNUM 0x00000002 |
|
#define XFS_AGF_SEQNO 0x00000004 |
|
#define XFS_AGF_LENGTH 0x00000008 |
|
#define XFS_AGF_ROOTS 0x00000010 |
|
#define XFS_AGF_LEVELS 0x00000020 |
|
#define XFS_AGF_FLFIRST 0x00000040 |
|
#define XFS_AGF_FLLAST 0x00000080 |
|
#define XFS_AGF_FLCOUNT 0x00000100 |
|
#define XFS_AGF_FREEBLKS 0x00000200 |
|
#define XFS_AGF_LONGEST 0x00000400 |
|
#define XFS_AGF_BTREEBLKS 0x00000800 |
|
#define XFS_AGF_UUID 0x00001000 |
|
#define XFS_AGF_RMAP_BLOCKS 0x00002000 |
|
#define XFS_AGF_REFCOUNT_BLOCKS 0x00004000 |
|
#define XFS_AGF_REFCOUNT_ROOT 0x00008000 |
|
#define XFS_AGF_REFCOUNT_LEVEL 0x00010000 |
|
#define XFS_AGF_SPARE64 0x00020000 |
|
#define XFS_AGF_NUM_BITS 18 |
|
#define XFS_AGF_ALL_BITS ((1 << XFS_AGF_NUM_BITS) - 1) |
|
|
|
#define XFS_AGF_FLAGS \ |
|
{ XFS_AGF_MAGICNUM, "MAGICNUM" }, \ |
|
{ XFS_AGF_VERSIONNUM, "VERSIONNUM" }, \ |
|
{ XFS_AGF_SEQNO, "SEQNO" }, \ |
|
{ XFS_AGF_LENGTH, "LENGTH" }, \ |
|
{ XFS_AGF_ROOTS, "ROOTS" }, \ |
|
{ XFS_AGF_LEVELS, "LEVELS" }, \ |
|
{ XFS_AGF_FLFIRST, "FLFIRST" }, \ |
|
{ XFS_AGF_FLLAST, "FLLAST" }, \ |
|
{ XFS_AGF_FLCOUNT, "FLCOUNT" }, \ |
|
{ XFS_AGF_FREEBLKS, "FREEBLKS" }, \ |
|
{ XFS_AGF_LONGEST, "LONGEST" }, \ |
|
{ XFS_AGF_BTREEBLKS, "BTREEBLKS" }, \ |
|
{ XFS_AGF_UUID, "UUID" }, \ |
|
{ XFS_AGF_RMAP_BLOCKS, "RMAP_BLOCKS" }, \ |
|
{ XFS_AGF_REFCOUNT_BLOCKS, "REFCOUNT_BLOCKS" }, \ |
|
{ XFS_AGF_REFCOUNT_ROOT, "REFCOUNT_ROOT" }, \ |
|
{ XFS_AGF_REFCOUNT_LEVEL, "REFCOUNT_LEVEL" }, \ |
|
{ XFS_AGF_SPARE64, "SPARE64" } |
|
|
|
/* disk block (xfs_daddr_t) in the AG */ |
|
#define XFS_AGF_DADDR(mp) ((xfs_daddr_t)(1 << (mp)->m_sectbb_log)) |
|
#define XFS_AGF_BLOCK(mp) XFS_HDR_BLOCK(mp, XFS_AGF_DADDR(mp)) |
|
|
|
/* |
|
* Size of the unlinked inode hash table in the agi. |
|
*/ |
|
#define XFS_AGI_UNLINKED_BUCKETS 64 |
|
|
|
typedef struct xfs_agi { |
|
/* |
|
* Common allocation group header information |
|
*/ |
|
__be32 agi_magicnum; /* magic number == XFS_AGI_MAGIC */ |
|
__be32 agi_versionnum; /* header version == XFS_AGI_VERSION */ |
|
__be32 agi_seqno; /* sequence # starting from 0 */ |
|
__be32 agi_length; /* size in blocks of a.g. */ |
|
/* |
|
* Inode information |
|
* Inodes are mapped by interpreting the inode number, so no |
|
* mapping data is needed here. |
|
*/ |
|
__be32 agi_count; /* count of allocated inodes */ |
|
__be32 agi_root; /* root of inode btree */ |
|
__be32 agi_level; /* levels in inode btree */ |
|
__be32 agi_freecount; /* number of free inodes */ |
|
|
|
__be32 agi_newino; /* new inode just allocated */ |
|
__be32 agi_dirino; /* last directory inode chunk */ |
|
/* |
|
* Hash table of inodes which have been unlinked but are |
|
* still being referenced. |
|
*/ |
|
__be32 agi_unlinked[XFS_AGI_UNLINKED_BUCKETS]; |
|
/* |
|
* This marks the end of logging region 1 and start of logging region 2. |
|
*/ |
|
uuid_t agi_uuid; /* uuid of filesystem */ |
|
__be32 agi_crc; /* crc of agi sector */ |
|
__be32 agi_pad32; |
|
__be64 agi_lsn; /* last write sequence */ |
|
|
|
__be32 agi_free_root; /* root of the free inode btree */ |
|
__be32 agi_free_level;/* levels in free inode btree */ |
|
|
|
__be32 agi_iblocks; /* inobt blocks used */ |
|
__be32 agi_fblocks; /* finobt blocks used */ |
|
|
|
/* structure must be padded to 64 bit alignment */ |
|
} xfs_agi_t; |
|
|
|
#define XFS_AGI_CRC_OFF offsetof(struct xfs_agi, agi_crc) |
|
|
|
#define XFS_AGI_MAGICNUM (1 << 0) |
|
#define XFS_AGI_VERSIONNUM (1 << 1) |
|
#define XFS_AGI_SEQNO (1 << 2) |
|
#define XFS_AGI_LENGTH (1 << 3) |
|
#define XFS_AGI_COUNT (1 << 4) |
|
#define XFS_AGI_ROOT (1 << 5) |
|
#define XFS_AGI_LEVEL (1 << 6) |
|
#define XFS_AGI_FREECOUNT (1 << 7) |
|
#define XFS_AGI_NEWINO (1 << 8) |
|
#define XFS_AGI_DIRINO (1 << 9) |
|
#define XFS_AGI_UNLINKED (1 << 10) |
|
#define XFS_AGI_NUM_BITS_R1 11 /* end of the 1st agi logging region */ |
|
#define XFS_AGI_ALL_BITS_R1 ((1 << XFS_AGI_NUM_BITS_R1) - 1) |
|
#define XFS_AGI_FREE_ROOT (1 << 11) |
|
#define XFS_AGI_FREE_LEVEL (1 << 12) |
|
#define XFS_AGI_IBLOCKS (1 << 13) /* both inobt/finobt block counters */ |
|
#define XFS_AGI_NUM_BITS_R2 14 |
|
|
|
/* disk block (xfs_daddr_t) in the AG */ |
|
#define XFS_AGI_DADDR(mp) ((xfs_daddr_t)(2 << (mp)->m_sectbb_log)) |
|
#define XFS_AGI_BLOCK(mp) XFS_HDR_BLOCK(mp, XFS_AGI_DADDR(mp)) |
|
|
|
/* |
|
* The third a.g. block contains the a.g. freelist, an array |
|
* of block pointers to blocks owned by the allocation btree code. |
|
*/ |
|
#define XFS_AGFL_DADDR(mp) ((xfs_daddr_t)(3 << (mp)->m_sectbb_log)) |
|
#define XFS_AGFL_BLOCK(mp) XFS_HDR_BLOCK(mp, XFS_AGFL_DADDR(mp)) |
|
#define XFS_BUF_TO_AGFL(bp) ((struct xfs_agfl *)((bp)->b_addr)) |
|
|
|
struct xfs_agfl { |
|
__be32 agfl_magicnum; |
|
__be32 agfl_seqno; |
|
uuid_t agfl_uuid; |
|
__be64 agfl_lsn; |
|
__be32 agfl_crc; |
|
} __attribute__((packed)); |
|
|
|
#define XFS_AGFL_CRC_OFF offsetof(struct xfs_agfl, agfl_crc) |
|
|
|
#define XFS_AGB_TO_FSB(mp,agno,agbno) \ |
|
(((xfs_fsblock_t)(agno) << (mp)->m_sb.sb_agblklog) | (agbno)) |
|
#define XFS_FSB_TO_AGNO(mp,fsbno) \ |
|
((xfs_agnumber_t)((fsbno) >> (mp)->m_sb.sb_agblklog)) |
|
#define XFS_FSB_TO_AGBNO(mp,fsbno) \ |
|
((xfs_agblock_t)((fsbno) & xfs_mask32lo((mp)->m_sb.sb_agblklog))) |
|
#define XFS_AGB_TO_DADDR(mp,agno,agbno) \ |
|
((xfs_daddr_t)XFS_FSB_TO_BB(mp, \ |
|
(xfs_fsblock_t)(agno) * (mp)->m_sb.sb_agblocks + (agbno))) |
|
#define XFS_AG_DADDR(mp,agno,d) (XFS_AGB_TO_DADDR(mp, agno, 0) + (d)) |
|
|
|
/* |
|
* For checking for bad ranges of xfs_daddr_t's, covering multiple |
|
* allocation groups or a single xfs_daddr_t that's a superblock copy. |
|
*/ |
|
#define XFS_AG_CHECK_DADDR(mp,d,len) \ |
|
((len) == 1 ? \ |
|
ASSERT((d) == XFS_SB_DADDR || \ |
|
xfs_daddr_to_agbno(mp, d) != XFS_SB_DADDR) : \ |
|
ASSERT(xfs_daddr_to_agno(mp, d) == \ |
|
xfs_daddr_to_agno(mp, (d) + (len) - 1))) |
|
|
|
/* |
|
* XFS Timestamps |
|
* ============== |
|
* |
|
* Traditional ondisk inode timestamps consist of signed 32-bit counters for |
|
* seconds and nanoseconds; time zero is the Unix epoch, Jan 1 00:00:00 UTC |
|
* 1970, which means that the timestamp epoch is the same as the Unix epoch. |
|
* Therefore, the ondisk min and max defined here can be used directly to |
|
* constrain the incore timestamps on a Unix system. Note that we actually |
|
* encode a __be64 value on disk. |
|
* |
|
* When the bigtime feature is enabled, ondisk inode timestamps become an |
|
* unsigned 64-bit nanoseconds counter. This means that the bigtime inode |
|
* timestamp epoch is the start of the classic timestamp range, which is |
|
* Dec 31 20:45:52 UTC 1901. Because the epochs are not the same, callers |
|
* /must/ use the bigtime conversion functions when encoding and decoding raw |
|
* timestamps. |
|
*/ |
|
typedef __be64 xfs_timestamp_t; |
|
|
|
/* Legacy timestamp encoding format. */ |
|
struct xfs_legacy_timestamp { |
|
__be32 t_sec; /* timestamp seconds */ |
|
__be32 t_nsec; /* timestamp nanoseconds */ |
|
}; |
|
|
|
/* |
|
* Smallest possible ondisk seconds value with traditional timestamps. This |
|
* corresponds exactly with the incore timestamp Dec 13 20:45:52 UTC 1901. |
|
*/ |
|
#define XFS_LEGACY_TIME_MIN ((int64_t)S32_MIN) |
|
|
|
/* |
|
* Largest possible ondisk seconds value with traditional timestamps. This |
|
* corresponds exactly with the incore timestamp Jan 19 03:14:07 UTC 2038. |
|
*/ |
|
#define XFS_LEGACY_TIME_MAX ((int64_t)S32_MAX) |
|
|
|
/* |
|
* Smallest possible ondisk seconds value with bigtime timestamps. This |
|
* corresponds (after conversion to a Unix timestamp) with the traditional |
|
* minimum timestamp of Dec 13 20:45:52 UTC 1901. |
|
*/ |
|
#define XFS_BIGTIME_TIME_MIN ((int64_t)0) |
|
|
|
/* |
|
* Largest supported ondisk seconds value with bigtime timestamps. This |
|
* corresponds (after conversion to a Unix timestamp) with an incore timestamp |
|
* of Jul 2 20:20:24 UTC 2486. |
|
* |
|
* We round down the ondisk limit so that the bigtime quota and inode max |
|
* timestamps will be the same. |
|
*/ |
|
#define XFS_BIGTIME_TIME_MAX ((int64_t)((-1ULL / NSEC_PER_SEC) & ~0x3ULL)) |
|
|
|
/* |
|
* Bigtime epoch is set exactly to the minimum time value that a traditional |
|
* 32-bit timestamp can represent when using the Unix epoch as a reference. |
|
* Hence the Unix epoch is at a fixed offset into the supported bigtime |
|
* timestamp range. |
|
* |
|
* The bigtime epoch also matches the minimum value an on-disk 32-bit XFS |
|
* timestamp can represent so we will not lose any fidelity in converting |
|
* to/from unix and bigtime timestamps. |
|
* |
|
* The following conversion factor converts a seconds counter from the Unix |
|
* epoch to the bigtime epoch. |
|
*/ |
|
#define XFS_BIGTIME_EPOCH_OFFSET (-(int64_t)S32_MIN) |
|
|
|
/* Convert a timestamp from the Unix epoch to the bigtime epoch. */ |
|
static inline uint64_t xfs_unix_to_bigtime(time64_t unix_seconds) |
|
{ |
|
return (uint64_t)unix_seconds + XFS_BIGTIME_EPOCH_OFFSET; |
|
} |
|
|
|
/* Convert a timestamp from the bigtime epoch to the Unix epoch. */ |
|
static inline time64_t xfs_bigtime_to_unix(uint64_t ondisk_seconds) |
|
{ |
|
return (time64_t)ondisk_seconds - XFS_BIGTIME_EPOCH_OFFSET; |
|
} |
|
|
|
/* |
|
* On-disk inode structure. |
|
* |
|
* This is just the header or "dinode core", the inode is expanded to fill a |
|
* variable size the leftover area split into a data and an attribute fork. |
|
* The format of the data and attribute fork depends on the format of the |
|
* inode as indicated by di_format and di_aformat. To access the data and |
|
* attribute use the XFS_DFORK_DPTR, XFS_DFORK_APTR, and XFS_DFORK_PTR macros |
|
* below. |
|
* |
|
* There is a very similar struct icdinode in xfs_inode which matches the |
|
* layout of the first 96 bytes of this structure, but is kept in native |
|
* format instead of big endian. |
|
* |
|
* Note: di_flushiter is only used by v1/2 inodes - it's effectively a zeroed |
|
* padding field for v3 inodes. |
|
*/ |
|
#define XFS_DINODE_MAGIC 0x494e /* 'IN' */ |
|
typedef struct xfs_dinode { |
|
__be16 di_magic; /* inode magic # = XFS_DINODE_MAGIC */ |
|
__be16 di_mode; /* mode and type of file */ |
|
__u8 di_version; /* inode version */ |
|
__u8 di_format; /* format of di_c data */ |
|
__be16 di_onlink; /* old number of links to file */ |
|
__be32 di_uid; /* owner's user id */ |
|
__be32 di_gid; /* owner's group id */ |
|
__be32 di_nlink; /* number of links to file */ |
|
__be16 di_projid_lo; /* lower part of owner's project id */ |
|
__be16 di_projid_hi; /* higher part owner's project id */ |
|
__u8 di_pad[6]; /* unused, zeroed space */ |
|
__be16 di_flushiter; /* incremented on flush */ |
|
xfs_timestamp_t di_atime; /* time last accessed */ |
|
xfs_timestamp_t di_mtime; /* time last modified */ |
|
xfs_timestamp_t di_ctime; /* time created/inode modified */ |
|
__be64 di_size; /* number of bytes in file */ |
|
__be64 di_nblocks; /* # of direct & btree blocks used */ |
|
__be32 di_extsize; /* basic/minimum extent size for file */ |
|
__be32 di_nextents; /* number of extents in data fork */ |
|
__be16 di_anextents; /* number of extents in attribute fork*/ |
|
__u8 di_forkoff; /* attr fork offs, <<3 for 64b align */ |
|
__s8 di_aformat; /* format of attr fork's data */ |
|
__be32 di_dmevmask; /* DMIG event mask */ |
|
__be16 di_dmstate; /* DMIG state info */ |
|
__be16 di_flags; /* random flags, XFS_DIFLAG_... */ |
|
__be32 di_gen; /* generation number */ |
|
|
|
/* di_next_unlinked is the only non-core field in the old dinode */ |
|
__be32 di_next_unlinked;/* agi unlinked list ptr */ |
|
|
|
/* start of the extended dinode, writable fields */ |
|
__le32 di_crc; /* CRC of the inode */ |
|
__be64 di_changecount; /* number of attribute changes */ |
|
__be64 di_lsn; /* flush sequence */ |
|
__be64 di_flags2; /* more random flags */ |
|
__be32 di_cowextsize; /* basic cow extent size for file */ |
|
__u8 di_pad2[12]; /* more padding for future expansion */ |
|
|
|
/* fields only written to during inode creation */ |
|
xfs_timestamp_t di_crtime; /* time created */ |
|
__be64 di_ino; /* inode number */ |
|
uuid_t di_uuid; /* UUID of the filesystem */ |
|
|
|
/* structure must be padded to 64 bit alignment */ |
|
} xfs_dinode_t; |
|
|
|
#define XFS_DINODE_CRC_OFF offsetof(struct xfs_dinode, di_crc) |
|
|
|
#define DI_MAX_FLUSH 0xffff |
|
|
|
/* |
|
* Size of the core inode on disk. Version 1 and 2 inodes have |
|
* the same size, but version 3 has grown a few additional fields. |
|
*/ |
|
static inline uint xfs_dinode_size(int version) |
|
{ |
|
if (version == 3) |
|
return sizeof(struct xfs_dinode); |
|
return offsetof(struct xfs_dinode, di_crc); |
|
} |
|
|
|
/* |
|
* The 32 bit link count in the inode theoretically maxes out at UINT_MAX. |
|
* Since the pathconf interface is signed, we use 2^31 - 1 instead. |
|
*/ |
|
#define XFS_MAXLINK ((1U << 31) - 1U) |
|
|
|
/* |
|
* Values for di_format |
|
* |
|
* This enum is used in string mapping in xfs_trace.h; please keep the |
|
* TRACE_DEFINE_ENUMs for it up to date. |
|
*/ |
|
enum xfs_dinode_fmt { |
|
XFS_DINODE_FMT_DEV, /* xfs_dev_t */ |
|
XFS_DINODE_FMT_LOCAL, /* bulk data */ |
|
XFS_DINODE_FMT_EXTENTS, /* struct xfs_bmbt_rec */ |
|
XFS_DINODE_FMT_BTREE, /* struct xfs_bmdr_block */ |
|
XFS_DINODE_FMT_UUID /* added long ago, but never used */ |
|
}; |
|
|
|
#define XFS_INODE_FORMAT_STR \ |
|
{ XFS_DINODE_FMT_DEV, "dev" }, \ |
|
{ XFS_DINODE_FMT_LOCAL, "local" }, \ |
|
{ XFS_DINODE_FMT_EXTENTS, "extent" }, \ |
|
{ XFS_DINODE_FMT_BTREE, "btree" }, \ |
|
{ XFS_DINODE_FMT_UUID, "uuid" } |
|
|
|
/* |
|
* Inode minimum and maximum sizes. |
|
*/ |
|
#define XFS_DINODE_MIN_LOG 8 |
|
#define XFS_DINODE_MAX_LOG 11 |
|
#define XFS_DINODE_MIN_SIZE (1 << XFS_DINODE_MIN_LOG) |
|
#define XFS_DINODE_MAX_SIZE (1 << XFS_DINODE_MAX_LOG) |
|
|
|
/* |
|
* Inode size for given fs. |
|
*/ |
|
#define XFS_DINODE_SIZE(sbp) \ |
|
(xfs_sb_version_has_v3inode(sbp) ? \ |
|
sizeof(struct xfs_dinode) : \ |
|
offsetof(struct xfs_dinode, di_crc)) |
|
#define XFS_LITINO(mp) \ |
|
((mp)->m_sb.sb_inodesize - XFS_DINODE_SIZE(&(mp)->m_sb)) |
|
|
|
/* |
|
* Inode data & attribute fork sizes, per inode. |
|
*/ |
|
#define XFS_DFORK_BOFF(dip) ((int)((dip)->di_forkoff << 3)) |
|
|
|
#define XFS_DFORK_DSIZE(dip,mp) \ |
|
((dip)->di_forkoff ? XFS_DFORK_BOFF(dip) : XFS_LITINO(mp)) |
|
#define XFS_DFORK_ASIZE(dip,mp) \ |
|
((dip)->di_forkoff ? XFS_LITINO(mp) - XFS_DFORK_BOFF(dip) : 0) |
|
#define XFS_DFORK_SIZE(dip,mp,w) \ |
|
((w) == XFS_DATA_FORK ? \ |
|
XFS_DFORK_DSIZE(dip, mp) : \ |
|
XFS_DFORK_ASIZE(dip, mp)) |
|
|
|
#define XFS_DFORK_MAXEXT(dip, mp, w) \ |
|
(XFS_DFORK_SIZE(dip, mp, w) / sizeof(struct xfs_bmbt_rec)) |
|
|
|
/* |
|
* Return pointers to the data or attribute forks. |
|
*/ |
|
#define XFS_DFORK_DPTR(dip) \ |
|
((char *)dip + xfs_dinode_size(dip->di_version)) |
|
#define XFS_DFORK_APTR(dip) \ |
|
(XFS_DFORK_DPTR(dip) + XFS_DFORK_BOFF(dip)) |
|
#define XFS_DFORK_PTR(dip,w) \ |
|
((w) == XFS_DATA_FORK ? XFS_DFORK_DPTR(dip) : XFS_DFORK_APTR(dip)) |
|
|
|
#define XFS_DFORK_FORMAT(dip,w) \ |
|
((w) == XFS_DATA_FORK ? \ |
|
(dip)->di_format : \ |
|
(dip)->di_aformat) |
|
#define XFS_DFORK_NEXTENTS(dip,w) \ |
|
((w) == XFS_DATA_FORK ? \ |
|
be32_to_cpu((dip)->di_nextents) : \ |
|
be16_to_cpu((dip)->di_anextents)) |
|
|
|
/* |
|
* For block and character special files the 32bit dev_t is stored at the |
|
* beginning of the data fork. |
|
*/ |
|
static inline xfs_dev_t xfs_dinode_get_rdev(struct xfs_dinode *dip) |
|
{ |
|
return be32_to_cpu(*(__be32 *)XFS_DFORK_DPTR(dip)); |
|
} |
|
|
|
static inline void xfs_dinode_put_rdev(struct xfs_dinode *dip, xfs_dev_t rdev) |
|
{ |
|
*(__be32 *)XFS_DFORK_DPTR(dip) = cpu_to_be32(rdev); |
|
} |
|
|
|
/* |
|
* Values for di_flags |
|
*/ |
|
#define XFS_DIFLAG_REALTIME_BIT 0 /* file's blocks come from rt area */ |
|
#define XFS_DIFLAG_PREALLOC_BIT 1 /* file space has been preallocated */ |
|
#define XFS_DIFLAG_NEWRTBM_BIT 2 /* for rtbitmap inode, new format */ |
|
#define XFS_DIFLAG_IMMUTABLE_BIT 3 /* inode is immutable */ |
|
#define XFS_DIFLAG_APPEND_BIT 4 /* inode is append-only */ |
|
#define XFS_DIFLAG_SYNC_BIT 5 /* inode is written synchronously */ |
|
#define XFS_DIFLAG_NOATIME_BIT 6 /* do not update atime */ |
|
#define XFS_DIFLAG_NODUMP_BIT 7 /* do not dump */ |
|
#define XFS_DIFLAG_RTINHERIT_BIT 8 /* create with realtime bit set */ |
|
#define XFS_DIFLAG_PROJINHERIT_BIT 9 /* create with parents projid */ |
|
#define XFS_DIFLAG_NOSYMLINKS_BIT 10 /* disallow symlink creation */ |
|
#define XFS_DIFLAG_EXTSIZE_BIT 11 /* inode extent size allocator hint */ |
|
#define XFS_DIFLAG_EXTSZINHERIT_BIT 12 /* inherit inode extent size */ |
|
#define XFS_DIFLAG_NODEFRAG_BIT 13 /* do not reorganize/defragment */ |
|
#define XFS_DIFLAG_FILESTREAM_BIT 14 /* use filestream allocator */ |
|
/* Do not use bit 15, di_flags is legacy and unchanging now */ |
|
|
|
#define XFS_DIFLAG_REALTIME (1 << XFS_DIFLAG_REALTIME_BIT) |
|
#define XFS_DIFLAG_PREALLOC (1 << XFS_DIFLAG_PREALLOC_BIT) |
|
#define XFS_DIFLAG_NEWRTBM (1 << XFS_DIFLAG_NEWRTBM_BIT) |
|
#define XFS_DIFLAG_IMMUTABLE (1 << XFS_DIFLAG_IMMUTABLE_BIT) |
|
#define XFS_DIFLAG_APPEND (1 << XFS_DIFLAG_APPEND_BIT) |
|
#define XFS_DIFLAG_SYNC (1 << XFS_DIFLAG_SYNC_BIT) |
|
#define XFS_DIFLAG_NOATIME (1 << XFS_DIFLAG_NOATIME_BIT) |
|
#define XFS_DIFLAG_NODUMP (1 << XFS_DIFLAG_NODUMP_BIT) |
|
#define XFS_DIFLAG_RTINHERIT (1 << XFS_DIFLAG_RTINHERIT_BIT) |
|
#define XFS_DIFLAG_PROJINHERIT (1 << XFS_DIFLAG_PROJINHERIT_BIT) |
|
#define XFS_DIFLAG_NOSYMLINKS (1 << XFS_DIFLAG_NOSYMLINKS_BIT) |
|
#define XFS_DIFLAG_EXTSIZE (1 << XFS_DIFLAG_EXTSIZE_BIT) |
|
#define XFS_DIFLAG_EXTSZINHERIT (1 << XFS_DIFLAG_EXTSZINHERIT_BIT) |
|
#define XFS_DIFLAG_NODEFRAG (1 << XFS_DIFLAG_NODEFRAG_BIT) |
|
#define XFS_DIFLAG_FILESTREAM (1 << XFS_DIFLAG_FILESTREAM_BIT) |
|
|
|
#define XFS_DIFLAG_ANY \ |
|
(XFS_DIFLAG_REALTIME | XFS_DIFLAG_PREALLOC | XFS_DIFLAG_NEWRTBM | \ |
|
XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND | XFS_DIFLAG_SYNC | \ |
|
XFS_DIFLAG_NOATIME | XFS_DIFLAG_NODUMP | XFS_DIFLAG_RTINHERIT | \ |
|
XFS_DIFLAG_PROJINHERIT | XFS_DIFLAG_NOSYMLINKS | XFS_DIFLAG_EXTSIZE | \ |
|
XFS_DIFLAG_EXTSZINHERIT | XFS_DIFLAG_NODEFRAG | XFS_DIFLAG_FILESTREAM) |
|
|
|
/* |
|
* Values for di_flags2 These start by being exposed to userspace in the upper |
|
* 16 bits of the XFS_XFLAG_s range. |
|
*/ |
|
#define XFS_DIFLAG2_DAX_BIT 0 /* use DAX for this inode */ |
|
#define XFS_DIFLAG2_REFLINK_BIT 1 /* file's blocks may be shared */ |
|
#define XFS_DIFLAG2_COWEXTSIZE_BIT 2 /* copy on write extent size hint */ |
|
#define XFS_DIFLAG2_BIGTIME_BIT 3 /* big timestamps */ |
|
|
|
#define XFS_DIFLAG2_DAX (1 << XFS_DIFLAG2_DAX_BIT) |
|
#define XFS_DIFLAG2_REFLINK (1 << XFS_DIFLAG2_REFLINK_BIT) |
|
#define XFS_DIFLAG2_COWEXTSIZE (1 << XFS_DIFLAG2_COWEXTSIZE_BIT) |
|
#define XFS_DIFLAG2_BIGTIME (1 << XFS_DIFLAG2_BIGTIME_BIT) |
|
|
|
#define XFS_DIFLAG2_ANY \ |
|
(XFS_DIFLAG2_DAX | XFS_DIFLAG2_REFLINK | XFS_DIFLAG2_COWEXTSIZE | \ |
|
XFS_DIFLAG2_BIGTIME) |
|
|
|
static inline bool xfs_dinode_has_bigtime(const struct xfs_dinode *dip) |
|
{ |
|
return dip->di_version >= 3 && |
|
(dip->di_flags2 & cpu_to_be64(XFS_DIFLAG2_BIGTIME)); |
|
} |
|
|
|
/* |
|
* Inode number format: |
|
* low inopblog bits - offset in block |
|
* next agblklog bits - block number in ag |
|
* next agno_log bits - ag number |
|
* high agno_log-agblklog-inopblog bits - 0 |
|
*/ |
|
#define XFS_INO_MASK(k) (uint32_t)((1ULL << (k)) - 1) |
|
#define XFS_INO_OFFSET_BITS(mp) (mp)->m_sb.sb_inopblog |
|
#define XFS_INO_AGBNO_BITS(mp) (mp)->m_sb.sb_agblklog |
|
#define XFS_INO_AGINO_BITS(mp) ((mp)->m_ino_geo.agino_log) |
|
#define XFS_INO_AGNO_BITS(mp) (mp)->m_agno_log |
|
#define XFS_INO_BITS(mp) \ |
|
XFS_INO_AGNO_BITS(mp) + XFS_INO_AGINO_BITS(mp) |
|
#define XFS_INO_TO_AGNO(mp,i) \ |
|
((xfs_agnumber_t)((i) >> XFS_INO_AGINO_BITS(mp))) |
|
#define XFS_INO_TO_AGINO(mp,i) \ |
|
((xfs_agino_t)(i) & XFS_INO_MASK(XFS_INO_AGINO_BITS(mp))) |
|
#define XFS_INO_TO_AGBNO(mp,i) \ |
|
(((xfs_agblock_t)(i) >> XFS_INO_OFFSET_BITS(mp)) & \ |
|
XFS_INO_MASK(XFS_INO_AGBNO_BITS(mp))) |
|
#define XFS_INO_TO_OFFSET(mp,i) \ |
|
((int)(i) & XFS_INO_MASK(XFS_INO_OFFSET_BITS(mp))) |
|
#define XFS_INO_TO_FSB(mp,i) \ |
|
XFS_AGB_TO_FSB(mp, XFS_INO_TO_AGNO(mp,i), XFS_INO_TO_AGBNO(mp,i)) |
|
#define XFS_AGINO_TO_INO(mp,a,i) \ |
|
(((xfs_ino_t)(a) << XFS_INO_AGINO_BITS(mp)) | (i)) |
|
#define XFS_AGINO_TO_AGBNO(mp,i) ((i) >> XFS_INO_OFFSET_BITS(mp)) |
|
#define XFS_AGINO_TO_OFFSET(mp,i) \ |
|
((i) & XFS_INO_MASK(XFS_INO_OFFSET_BITS(mp))) |
|
#define XFS_OFFBNO_TO_AGINO(mp,b,o) \ |
|
((xfs_agino_t)(((b) << XFS_INO_OFFSET_BITS(mp)) | (o))) |
|
#define XFS_FSB_TO_INO(mp, b) ((xfs_ino_t)((b) << XFS_INO_OFFSET_BITS(mp))) |
|
#define XFS_AGB_TO_AGINO(mp, b) ((xfs_agino_t)((b) << XFS_INO_OFFSET_BITS(mp))) |
|
|
|
#define XFS_MAXINUMBER ((xfs_ino_t)((1ULL << 56) - 1ULL)) |
|
#define XFS_MAXINUMBER_32 ((xfs_ino_t)((1ULL << 32) - 1ULL)) |
|
|
|
/* |
|
* RealTime Device format definitions |
|
*/ |
|
|
|
/* Min and max rt extent sizes, specified in bytes */ |
|
#define XFS_MAX_RTEXTSIZE (1024 * 1024 * 1024) /* 1GB */ |
|
#define XFS_DFL_RTEXTSIZE (64 * 1024) /* 64kB */ |
|
#define XFS_MIN_RTEXTSIZE (4 * 1024) /* 4kB */ |
|
|
|
#define XFS_BLOCKSIZE(mp) ((mp)->m_sb.sb_blocksize) |
|
#define XFS_BLOCKMASK(mp) ((mp)->m_blockmask) |
|
#define XFS_BLOCKWSIZE(mp) ((mp)->m_blockwsize) |
|
#define XFS_BLOCKWMASK(mp) ((mp)->m_blockwmask) |
|
|
|
/* |
|
* RT Summary and bit manipulation macros. |
|
*/ |
|
#define XFS_SUMOFFS(mp,ls,bb) ((int)((ls) * (mp)->m_sb.sb_rbmblocks + (bb))) |
|
#define XFS_SUMOFFSTOBLOCK(mp,s) \ |
|
(((s) * (uint)sizeof(xfs_suminfo_t)) >> (mp)->m_sb.sb_blocklog) |
|
#define XFS_SUMPTR(mp,bp,so) \ |
|
((xfs_suminfo_t *)((bp)->b_addr + \ |
|
(((so) * (uint)sizeof(xfs_suminfo_t)) & XFS_BLOCKMASK(mp)))) |
|
|
|
#define XFS_BITTOBLOCK(mp,bi) ((bi) >> (mp)->m_blkbit_log) |
|
#define XFS_BLOCKTOBIT(mp,bb) ((bb) << (mp)->m_blkbit_log) |
|
#define XFS_BITTOWORD(mp,bi) \ |
|
((int)(((bi) >> XFS_NBWORDLOG) & XFS_BLOCKWMASK(mp))) |
|
|
|
#define XFS_RTMIN(a,b) ((a) < (b) ? (a) : (b)) |
|
#define XFS_RTMAX(a,b) ((a) > (b) ? (a) : (b)) |
|
|
|
#define XFS_RTLOBIT(w) xfs_lowbit32(w) |
|
#define XFS_RTHIBIT(w) xfs_highbit32(w) |
|
|
|
#define XFS_RTBLOCKLOG(b) xfs_highbit64(b) |
|
|
|
/* |
|
* Dquot and dquot block format definitions |
|
*/ |
|
#define XFS_DQUOT_MAGIC 0x4451 /* 'DQ' */ |
|
#define XFS_DQUOT_VERSION (uint8_t)0x01 /* latest version number */ |
|
|
|
#define XFS_DQTYPE_USER 0x01 /* user dquot record */ |
|
#define XFS_DQTYPE_PROJ 0x02 /* project dquot record */ |
|
#define XFS_DQTYPE_GROUP 0x04 /* group dquot record */ |
|
#define XFS_DQTYPE_BIGTIME 0x80 /* large expiry timestamps */ |
|
|
|
/* bitmask to determine if this is a user/group/project dquot */ |
|
#define XFS_DQTYPE_REC_MASK (XFS_DQTYPE_USER | \ |
|
XFS_DQTYPE_PROJ | \ |
|
XFS_DQTYPE_GROUP) |
|
|
|
#define XFS_DQTYPE_ANY (XFS_DQTYPE_REC_MASK | \ |
|
XFS_DQTYPE_BIGTIME) |
|
|
|
/* |
|
* XFS Quota Timers |
|
* ================ |
|
* |
|
* Traditional quota grace period expiration timers are an unsigned 32-bit |
|
* seconds counter; time zero is the Unix epoch, Jan 1 00:00:01 UTC 1970. |
|
* Note that an expiration value of zero means that the quota limit has not |
|
* been reached, and therefore no expiration has been set. Therefore, the |
|
* ondisk min and max defined here can be used directly to constrain the incore |
|
* quota expiration timestamps on a Unix system. |
|
* |
|
* When bigtime is enabled, we trade two bits of precision to expand the |
|
* expiration timeout range to match that of big inode timestamps. The min and |
|
* max recorded here are the on-disk limits, not a Unix timestamp. |
|
* |
|
* The grace period for each quota type is stored in the root dquot (id = 0) |
|
* and is applied to a non-root dquot when it exceeds the soft or hard limits. |
|
* The length of quota grace periods are unsigned 32-bit quantities measured in |
|
* units of seconds. A value of zero means to use the default period. |
|
*/ |
|
|
|
/* |
|
* Smallest possible ondisk quota expiration value with traditional timestamps. |
|
* This corresponds exactly with the incore expiration Jan 1 00:00:01 UTC 1970. |
|
*/ |
|
#define XFS_DQ_LEGACY_EXPIRY_MIN ((int64_t)1) |
|
|
|
/* |
|
* Largest possible ondisk quota expiration value with traditional timestamps. |
|
* This corresponds exactly with the incore expiration Feb 7 06:28:15 UTC 2106. |
|
*/ |
|
#define XFS_DQ_LEGACY_EXPIRY_MAX ((int64_t)U32_MAX) |
|
|
|
/* |
|
* Smallest possible ondisk quota expiration value with bigtime timestamps. |
|
* This corresponds (after conversion to a Unix timestamp) with the incore |
|
* expiration of Jan 1 00:00:04 UTC 1970. |
|
*/ |
|
#define XFS_DQ_BIGTIME_EXPIRY_MIN (XFS_DQ_LEGACY_EXPIRY_MIN) |
|
|
|
/* |
|
* Largest supported ondisk quota expiration value with bigtime timestamps. |
|
* This corresponds (after conversion to a Unix timestamp) with an incore |
|
* expiration of Jul 2 20:20:24 UTC 2486. |
|
* |
|
* The ondisk field supports values up to -1U, which corresponds to an incore |
|
* expiration in 2514. This is beyond the maximum the bigtime inode timestamp, |
|
* so we cap the maximum bigtime quota expiration to the max inode timestamp. |
|
*/ |
|
#define XFS_DQ_BIGTIME_EXPIRY_MAX ((int64_t)4074815106U) |
|
|
|
/* |
|
* The following conversion factors assist in converting a quota expiration |
|
* timestamp between the incore and ondisk formats. |
|
*/ |
|
#define XFS_DQ_BIGTIME_SHIFT (2) |
|
#define XFS_DQ_BIGTIME_SLACK ((int64_t)(1ULL << XFS_DQ_BIGTIME_SHIFT) - 1) |
|
|
|
/* Convert an incore quota expiration timestamp to an ondisk bigtime value. */ |
|
static inline uint32_t xfs_dq_unix_to_bigtime(time64_t unix_seconds) |
|
{ |
|
/* |
|
* Round the expiration timestamp up to the nearest bigtime timestamp |
|
* that we can store, to give users the most time to fix problems. |
|
*/ |
|
return ((uint64_t)unix_seconds + XFS_DQ_BIGTIME_SLACK) >> |
|
XFS_DQ_BIGTIME_SHIFT; |
|
} |
|
|
|
/* Convert an ondisk bigtime quota expiration value to an incore timestamp. */ |
|
static inline time64_t xfs_dq_bigtime_to_unix(uint32_t ondisk_seconds) |
|
{ |
|
return (time64_t)ondisk_seconds << XFS_DQ_BIGTIME_SHIFT; |
|
} |
|
|
|
/* |
|
* Default quota grace periods, ranging from zero (use the compiled defaults) |
|
* to ~136 years. These are applied to a non-root dquot that has exceeded |
|
* either limit. |
|
*/ |
|
#define XFS_DQ_GRACE_MIN ((int64_t)0) |
|
#define XFS_DQ_GRACE_MAX ((int64_t)U32_MAX) |
|
|
|
/* |
|
* This is the main portion of the on-disk representation of quota information |
|
* for a user. We pad this with some more expansion room to construct the on |
|
* disk structure. |
|
*/ |
|
struct xfs_disk_dquot { |
|
__be16 d_magic; /* dquot magic = XFS_DQUOT_MAGIC */ |
|
__u8 d_version; /* dquot version */ |
|
__u8 d_type; /* XFS_DQTYPE_USER/PROJ/GROUP */ |
|
__be32 d_id; /* user,project,group id */ |
|
__be64 d_blk_hardlimit;/* absolute limit on disk blks */ |
|
__be64 d_blk_softlimit;/* preferred limit on disk blks */ |
|
__be64 d_ino_hardlimit;/* maximum # allocated inodes */ |
|
__be64 d_ino_softlimit;/* preferred inode limit */ |
|
__be64 d_bcount; /* disk blocks owned by the user */ |
|
__be64 d_icount; /* inodes owned by the user */ |
|
__be32 d_itimer; /* zero if within inode limits if not, |
|
this is when we refuse service */ |
|
__be32 d_btimer; /* similar to above; for disk blocks */ |
|
__be16 d_iwarns; /* warnings issued wrt num inodes */ |
|
__be16 d_bwarns; /* warnings issued wrt disk blocks */ |
|
__be32 d_pad0; /* 64 bit align */ |
|
__be64 d_rtb_hardlimit;/* absolute limit on realtime blks */ |
|
__be64 d_rtb_softlimit;/* preferred limit on RT disk blks */ |
|
__be64 d_rtbcount; /* realtime blocks owned */ |
|
__be32 d_rtbtimer; /* similar to above; for RT disk blocks */ |
|
__be16 d_rtbwarns; /* warnings issued wrt RT disk blocks */ |
|
__be16 d_pad; |
|
}; |
|
|
|
/* |
|
* This is what goes on disk. This is separated from the xfs_disk_dquot because |
|
* carrying the unnecessary padding would be a waste of memory. |
|
*/ |
|
typedef struct xfs_dqblk { |
|
struct xfs_disk_dquot dd_diskdq; /* portion living incore as well */ |
|
char dd_fill[4];/* filling for posterity */ |
|
|
|
/* |
|
* These two are only present on filesystems with the CRC bits set. |
|
*/ |
|
__be32 dd_crc; /* checksum */ |
|
__be64 dd_lsn; /* last modification in log */ |
|
uuid_t dd_uuid; /* location information */ |
|
} xfs_dqblk_t; |
|
|
|
#define XFS_DQUOT_CRC_OFF offsetof(struct xfs_dqblk, dd_crc) |
|
|
|
/* |
|
* This defines the unit of allocation of dquots. |
|
* |
|
* Currently, it is just one file system block, and a 4K blk contains 30 |
|
* (136 * 30 = 4080) dquots. It's probably not worth trying to make |
|
* this more dynamic. |
|
* |
|
* However, if this number is changed, we have to make sure that we don't |
|
* implicitly assume that we do allocations in chunks of a single filesystem |
|
* block in the dquot/xqm code. |
|
* |
|
* This is part of the ondisk format because the structure size is not a power |
|
* of two, which leaves slack at the end of the disk block. |
|
*/ |
|
#define XFS_DQUOT_CLUSTER_SIZE_FSB (xfs_filblks_t)1 |
|
|
|
/* |
|
* Remote symlink format and access functions. |
|
*/ |
|
#define XFS_SYMLINK_MAGIC 0x58534c4d /* XSLM */ |
|
|
|
struct xfs_dsymlink_hdr { |
|
__be32 sl_magic; |
|
__be32 sl_offset; |
|
__be32 sl_bytes; |
|
__be32 sl_crc; |
|
uuid_t sl_uuid; |
|
__be64 sl_owner; |
|
__be64 sl_blkno; |
|
__be64 sl_lsn; |
|
}; |
|
|
|
#define XFS_SYMLINK_CRC_OFF offsetof(struct xfs_dsymlink_hdr, sl_crc) |
|
|
|
#define XFS_SYMLINK_MAXLEN 1024 |
|
/* |
|
* The maximum pathlen is 1024 bytes. Since the minimum file system |
|
* blocksize is 512 bytes, we can get a max of 3 extents back from |
|
* bmapi when crc headers are taken into account. |
|
*/ |
|
#define XFS_SYMLINK_MAPS 3 |
|
|
|
#define XFS_SYMLINK_BUF_SPACE(mp, bufsize) \ |
|
((bufsize) - (xfs_sb_version_hascrc(&(mp)->m_sb) ? \ |
|
sizeof(struct xfs_dsymlink_hdr) : 0)) |
|
|
|
|
|
/* |
|
* Allocation Btree format definitions |
|
* |
|
* There are two on-disk btrees, one sorted by blockno and one sorted |
|
* by blockcount and blockno. All blocks look the same to make the code |
|
* simpler; if we have time later, we'll make the optimizations. |
|
*/ |
|
#define XFS_ABTB_MAGIC 0x41425442 /* 'ABTB' for bno tree */ |
|
#define XFS_ABTB_CRC_MAGIC 0x41423342 /* 'AB3B' */ |
|
#define XFS_ABTC_MAGIC 0x41425443 /* 'ABTC' for cnt tree */ |
|
#define XFS_ABTC_CRC_MAGIC 0x41423343 /* 'AB3C' */ |
|
|
|
/* |
|
* Data record/key structure |
|
*/ |
|
typedef struct xfs_alloc_rec { |
|
__be32 ar_startblock; /* starting block number */ |
|
__be32 ar_blockcount; /* count of free blocks */ |
|
} xfs_alloc_rec_t, xfs_alloc_key_t; |
|
|
|
typedef struct xfs_alloc_rec_incore { |
|
xfs_agblock_t ar_startblock; /* starting block number */ |
|
xfs_extlen_t ar_blockcount; /* count of free blocks */ |
|
} xfs_alloc_rec_incore_t; |
|
|
|
/* btree pointer type */ |
|
typedef __be32 xfs_alloc_ptr_t; |
|
|
|
/* |
|
* Block numbers in the AG: |
|
* SB is sector 0, AGF is sector 1, AGI is sector 2, AGFL is sector 3. |
|
*/ |
|
#define XFS_BNO_BLOCK(mp) ((xfs_agblock_t)(XFS_AGFL_BLOCK(mp) + 1)) |
|
#define XFS_CNT_BLOCK(mp) ((xfs_agblock_t)(XFS_BNO_BLOCK(mp) + 1)) |
|
|
|
|
|
/* |
|
* Inode Allocation Btree format definitions |
|
* |
|
* There is a btree for the inode map per allocation group. |
|
*/ |
|
#define XFS_IBT_MAGIC 0x49414254 /* 'IABT' */ |
|
#define XFS_IBT_CRC_MAGIC 0x49414233 /* 'IAB3' */ |
|
#define XFS_FIBT_MAGIC 0x46494254 /* 'FIBT' */ |
|
#define XFS_FIBT_CRC_MAGIC 0x46494233 /* 'FIB3' */ |
|
|
|
typedef uint64_t xfs_inofree_t; |
|
#define XFS_INODES_PER_CHUNK (NBBY * sizeof(xfs_inofree_t)) |
|
#define XFS_INODES_PER_CHUNK_LOG (XFS_NBBYLOG + 3) |
|
#define XFS_INOBT_ALL_FREE ((xfs_inofree_t)-1) |
|
#define XFS_INOBT_MASK(i) ((xfs_inofree_t)1 << (i)) |
|
|
|
#define XFS_INOBT_HOLEMASK_FULL 0 /* holemask for full chunk */ |
|
#define XFS_INOBT_HOLEMASK_BITS (NBBY * sizeof(uint16_t)) |
|
#define XFS_INODES_PER_HOLEMASK_BIT \ |
|
(XFS_INODES_PER_CHUNK / (NBBY * sizeof(uint16_t))) |
|
|
|
static inline xfs_inofree_t xfs_inobt_maskn(int i, int n) |
|
{ |
|
return ((n >= XFS_INODES_PER_CHUNK ? 0 : XFS_INOBT_MASK(n)) - 1) << i; |
|
} |
|
|
|
/* |
|
* The on-disk inode record structure has two formats. The original "full" |
|
* format uses a 4-byte freecount. The "sparse" format uses a 1-byte freecount |
|
* and replaces the 3 high-order freecount bytes wth the holemask and inode |
|
* count. |
|
* |
|
* The holemask of the sparse record format allows an inode chunk to have holes |
|
* that refer to blocks not owned by the inode record. This facilitates inode |
|
* allocation in the event of severe free space fragmentation. |
|
*/ |
|
typedef struct xfs_inobt_rec { |
|
__be32 ir_startino; /* starting inode number */ |
|
union { |
|
struct { |
|
__be32 ir_freecount; /* count of free inodes */ |
|
} f; |
|
struct { |
|
__be16 ir_holemask;/* hole mask for sparse chunks */ |
|
__u8 ir_count; /* total inode count */ |
|
__u8 ir_freecount; /* count of free inodes */ |
|
} sp; |
|
} ir_u; |
|
__be64 ir_free; /* free inode mask */ |
|
} xfs_inobt_rec_t; |
|
|
|
typedef struct xfs_inobt_rec_incore { |
|
xfs_agino_t ir_startino; /* starting inode number */ |
|
uint16_t ir_holemask; /* hole mask for sparse chunks */ |
|
uint8_t ir_count; /* total inode count */ |
|
uint8_t ir_freecount; /* count of free inodes (set bits) */ |
|
xfs_inofree_t ir_free; /* free inode mask */ |
|
} xfs_inobt_rec_incore_t; |
|
|
|
static inline bool xfs_inobt_issparse(uint16_t holemask) |
|
{ |
|
/* non-zero holemask represents a sparse rec. */ |
|
return holemask; |
|
} |
|
|
|
/* |
|
* Key structure |
|
*/ |
|
typedef struct xfs_inobt_key { |
|
__be32 ir_startino; /* starting inode number */ |
|
} xfs_inobt_key_t; |
|
|
|
/* btree pointer type */ |
|
typedef __be32 xfs_inobt_ptr_t; |
|
|
|
/* |
|
* block numbers in the AG. |
|
*/ |
|
#define XFS_IBT_BLOCK(mp) ((xfs_agblock_t)(XFS_CNT_BLOCK(mp) + 1)) |
|
#define XFS_FIBT_BLOCK(mp) ((xfs_agblock_t)(XFS_IBT_BLOCK(mp) + 1)) |
|
|
|
/* |
|
* Reverse mapping btree format definitions |
|
* |
|
* There is a btree for the reverse map per allocation group |
|
*/ |
|
#define XFS_RMAP_CRC_MAGIC 0x524d4233 /* 'RMB3' */ |
|
|
|
/* |
|
* Ownership info for an extent. This is used to create reverse-mapping |
|
* entries. |
|
*/ |
|
#define XFS_OWNER_INFO_ATTR_FORK (1 << 0) |
|
#define XFS_OWNER_INFO_BMBT_BLOCK (1 << 1) |
|
struct xfs_owner_info { |
|
uint64_t oi_owner; |
|
xfs_fileoff_t oi_offset; |
|
unsigned int oi_flags; |
|
}; |
|
|
|
/* |
|
* Special owner types. |
|
* |
|
* Seeing as we only support up to 8EB, we have the upper bit of the owner field |
|
* to tell us we have a special owner value. We use these for static metadata |
|
* allocated at mkfs/growfs time, as well as for freespace management metadata. |
|
*/ |
|
#define XFS_RMAP_OWN_NULL (-1ULL) /* No owner, for growfs */ |
|
#define XFS_RMAP_OWN_UNKNOWN (-2ULL) /* Unknown owner, for EFI recovery */ |
|
#define XFS_RMAP_OWN_FS (-3ULL) /* static fs metadata */ |
|
#define XFS_RMAP_OWN_LOG (-4ULL) /* static fs metadata */ |
|
#define XFS_RMAP_OWN_AG (-5ULL) /* AG freespace btree blocks */ |
|
#define XFS_RMAP_OWN_INOBT (-6ULL) /* Inode btree blocks */ |
|
#define XFS_RMAP_OWN_INODES (-7ULL) /* Inode chunk */ |
|
#define XFS_RMAP_OWN_REFC (-8ULL) /* refcount tree */ |
|
#define XFS_RMAP_OWN_COW (-9ULL) /* cow allocations */ |
|
#define XFS_RMAP_OWN_MIN (-10ULL) /* guard */ |
|
|
|
#define XFS_RMAP_NON_INODE_OWNER(owner) (!!((owner) & (1ULL << 63))) |
|
|
|
/* |
|
* Data record structure |
|
*/ |
|
struct xfs_rmap_rec { |
|
__be32 rm_startblock; /* extent start block */ |
|
__be32 rm_blockcount; /* extent length */ |
|
__be64 rm_owner; /* extent owner */ |
|
__be64 rm_offset; /* offset within the owner */ |
|
}; |
|
|
|
/* |
|
* rmap btree record |
|
* rm_offset:63 is the attribute fork flag |
|
* rm_offset:62 is the bmbt block flag |
|
* rm_offset:61 is the unwritten extent flag (same as l0:63 in bmbt) |
|
* rm_offset:54-60 aren't used and should be zero |
|
* rm_offset:0-53 is the block offset within the inode |
|
*/ |
|
#define XFS_RMAP_OFF_ATTR_FORK ((uint64_t)1ULL << 63) |
|
#define XFS_RMAP_OFF_BMBT_BLOCK ((uint64_t)1ULL << 62) |
|
#define XFS_RMAP_OFF_UNWRITTEN ((uint64_t)1ULL << 61) |
|
|
|
#define XFS_RMAP_LEN_MAX ((uint32_t)~0U) |
|
#define XFS_RMAP_OFF_FLAGS (XFS_RMAP_OFF_ATTR_FORK | \ |
|
XFS_RMAP_OFF_BMBT_BLOCK | \ |
|
XFS_RMAP_OFF_UNWRITTEN) |
|
#define XFS_RMAP_OFF_MASK ((uint64_t)0x3FFFFFFFFFFFFFULL) |
|
|
|
#define XFS_RMAP_OFF(off) ((off) & XFS_RMAP_OFF_MASK) |
|
|
|
#define XFS_RMAP_IS_BMBT_BLOCK(off) (!!((off) & XFS_RMAP_OFF_BMBT_BLOCK)) |
|
#define XFS_RMAP_IS_ATTR_FORK(off) (!!((off) & XFS_RMAP_OFF_ATTR_FORK)) |
|
#define XFS_RMAP_IS_UNWRITTEN(len) (!!((off) & XFS_RMAP_OFF_UNWRITTEN)) |
|
|
|
#define RMAPBT_STARTBLOCK_BITLEN 32 |
|
#define RMAPBT_BLOCKCOUNT_BITLEN 32 |
|
#define RMAPBT_OWNER_BITLEN 64 |
|
#define RMAPBT_ATTRFLAG_BITLEN 1 |
|
#define RMAPBT_BMBTFLAG_BITLEN 1 |
|
#define RMAPBT_EXNTFLAG_BITLEN 1 |
|
#define RMAPBT_UNUSED_OFFSET_BITLEN 7 |
|
#define RMAPBT_OFFSET_BITLEN 54 |
|
|
|
#define XFS_RMAP_ATTR_FORK (1 << 0) |
|
#define XFS_RMAP_BMBT_BLOCK (1 << 1) |
|
#define XFS_RMAP_UNWRITTEN (1 << 2) |
|
#define XFS_RMAP_KEY_FLAGS (XFS_RMAP_ATTR_FORK | \ |
|
XFS_RMAP_BMBT_BLOCK) |
|
#define XFS_RMAP_REC_FLAGS (XFS_RMAP_UNWRITTEN) |
|
struct xfs_rmap_irec { |
|
xfs_agblock_t rm_startblock; /* extent start block */ |
|
xfs_extlen_t rm_blockcount; /* extent length */ |
|
uint64_t rm_owner; /* extent owner */ |
|
uint64_t rm_offset; /* offset within the owner */ |
|
unsigned int rm_flags; /* state flags */ |
|
}; |
|
|
|
/* |
|
* Key structure |
|
* |
|
* We don't use the length for lookups |
|
*/ |
|
struct xfs_rmap_key { |
|
__be32 rm_startblock; /* extent start block */ |
|
__be64 rm_owner; /* extent owner */ |
|
__be64 rm_offset; /* offset within the owner */ |
|
} __attribute__((packed)); |
|
|
|
/* btree pointer type */ |
|
typedef __be32 xfs_rmap_ptr_t; |
|
|
|
#define XFS_RMAP_BLOCK(mp) \ |
|
(xfs_sb_version_hasfinobt(&((mp)->m_sb)) ? \ |
|
XFS_FIBT_BLOCK(mp) + 1 : \ |
|
XFS_IBT_BLOCK(mp) + 1) |
|
|
|
/* |
|
* Reference Count Btree format definitions |
|
* |
|
*/ |
|
#define XFS_REFC_CRC_MAGIC 0x52334643 /* 'R3FC' */ |
|
|
|
unsigned int xfs_refc_block(struct xfs_mount *mp); |
|
|
|
/* |
|
* Data record/key structure |
|
* |
|
* Each record associates a range of physical blocks (starting at |
|
* rc_startblock and ending rc_blockcount blocks later) with a reference |
|
* count (rc_refcount). Extents that are being used to stage a copy on |
|
* write (CoW) operation are recorded in the refcount btree with a |
|
* refcount of 1. All other records must have a refcount > 1 and must |
|
* track an extent mapped only by file data forks. |
|
* |
|
* Extents with a single owner (attributes, metadata, non-shared file |
|
* data) are not tracked here. Free space is also not tracked here. |
|
* This is consistent with pre-reflink XFS. |
|
*/ |
|
|
|
/* |
|
* Extents that are being used to stage a copy on write are stored |
|
* in the refcount btree with a refcount of 1 and the upper bit set |
|
* on the startblock. This speeds up mount time deletion of stale |
|
* staging extents because they're all at the right side of the tree. |
|
*/ |
|
#define XFS_REFC_COW_START ((xfs_agblock_t)(1U << 31)) |
|
#define REFCNTBT_COWFLAG_BITLEN 1 |
|
#define REFCNTBT_AGBLOCK_BITLEN 31 |
|
|
|
struct xfs_refcount_rec { |
|
__be32 rc_startblock; /* starting block number */ |
|
__be32 rc_blockcount; /* count of blocks */ |
|
__be32 rc_refcount; /* number of inodes linked here */ |
|
}; |
|
|
|
struct xfs_refcount_key { |
|
__be32 rc_startblock; /* starting block number */ |
|
}; |
|
|
|
struct xfs_refcount_irec { |
|
xfs_agblock_t rc_startblock; /* starting block number */ |
|
xfs_extlen_t rc_blockcount; /* count of free blocks */ |
|
xfs_nlink_t rc_refcount; /* number of inodes linked here */ |
|
}; |
|
|
|
#define MAXREFCOUNT ((xfs_nlink_t)~0U) |
|
#define MAXREFCEXTLEN ((xfs_extlen_t)~0U) |
|
|
|
/* btree pointer type */ |
|
typedef __be32 xfs_refcount_ptr_t; |
|
|
|
|
|
/* |
|
* BMAP Btree format definitions |
|
* |
|
* This includes both the root block definition that sits inside an inode fork |
|
* and the record/pointer formats for the leaf/node in the blocks. |
|
*/ |
|
#define XFS_BMAP_MAGIC 0x424d4150 /* 'BMAP' */ |
|
#define XFS_BMAP_CRC_MAGIC 0x424d4133 /* 'BMA3' */ |
|
|
|
/* |
|
* Bmap root header, on-disk form only. |
|
*/ |
|
typedef struct xfs_bmdr_block { |
|
__be16 bb_level; /* 0 is a leaf */ |
|
__be16 bb_numrecs; /* current # of data records */ |
|
} xfs_bmdr_block_t; |
|
|
|
/* |
|
* Bmap btree record and extent descriptor. |
|
* l0:63 is an extent flag (value 1 indicates non-normal). |
|
* l0:9-62 are startoff. |
|
* l0:0-8 and l1:21-63 are startblock. |
|
* l1:0-20 are blockcount. |
|
*/ |
|
#define BMBT_EXNTFLAG_BITLEN 1 |
|
#define BMBT_STARTOFF_BITLEN 54 |
|
#define BMBT_STARTBLOCK_BITLEN 52 |
|
#define BMBT_BLOCKCOUNT_BITLEN 21 |
|
|
|
#define BMBT_STARTOFF_MASK ((1ULL << BMBT_STARTOFF_BITLEN) - 1) |
|
#define BMBT_BLOCKCOUNT_MASK ((1ULL << BMBT_BLOCKCOUNT_BITLEN) - 1) |
|
|
|
/* |
|
* bmbt records have a file offset (block) field that is 54 bits wide, so this |
|
* is the largest xfs_fileoff_t that we ever expect to see. |
|
*/ |
|
#define XFS_MAX_FILEOFF (BMBT_STARTOFF_MASK + BMBT_BLOCKCOUNT_MASK) |
|
|
|
typedef struct xfs_bmbt_rec { |
|
__be64 l0, l1; |
|
} xfs_bmbt_rec_t; |
|
|
|
typedef uint64_t xfs_bmbt_rec_base_t; /* use this for casts */ |
|
typedef xfs_bmbt_rec_t xfs_bmdr_rec_t; |
|
|
|
/* |
|
* Values and macros for delayed-allocation startblock fields. |
|
*/ |
|
#define STARTBLOCKVALBITS 17 |
|
#define STARTBLOCKMASKBITS (15 + 20) |
|
#define STARTBLOCKMASK \ |
|
(((((xfs_fsblock_t)1) << STARTBLOCKMASKBITS) - 1) << STARTBLOCKVALBITS) |
|
|
|
static inline int isnullstartblock(xfs_fsblock_t x) |
|
{ |
|
return ((x) & STARTBLOCKMASK) == STARTBLOCKMASK; |
|
} |
|
|
|
static inline xfs_fsblock_t nullstartblock(int k) |
|
{ |
|
ASSERT(k < (1 << STARTBLOCKVALBITS)); |
|
return STARTBLOCKMASK | (k); |
|
} |
|
|
|
static inline xfs_filblks_t startblockval(xfs_fsblock_t x) |
|
{ |
|
return (xfs_filblks_t)((x) & ~STARTBLOCKMASK); |
|
} |
|
|
|
/* |
|
* Key structure for non-leaf levels of the tree. |
|
*/ |
|
typedef struct xfs_bmbt_key { |
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__be64 br_startoff; /* starting file offset */ |
|
} xfs_bmbt_key_t, xfs_bmdr_key_t; |
|
|
|
/* btree pointer type */ |
|
typedef __be64 xfs_bmbt_ptr_t, xfs_bmdr_ptr_t; |
|
|
|
|
|
/* |
|
* Generic Btree block format definitions |
|
* |
|
* This is a combination of the actual format used on disk for short and long |
|
* format btrees. The first three fields are shared by both format, but the |
|
* pointers are different and should be used with care. |
|
* |
|
* To get the size of the actual short or long form headers please use the size |
|
* macros below. Never use sizeof(xfs_btree_block). |
|
* |
|
* The blkno, crc, lsn, owner and uuid fields are only available in filesystems |
|
* with the crc feature bit, and all accesses to them must be conditional on |
|
* that flag. |
|
*/ |
|
/* short form block header */ |
|
struct xfs_btree_block_shdr { |
|
__be32 bb_leftsib; |
|
__be32 bb_rightsib; |
|
|
|
__be64 bb_blkno; |
|
__be64 bb_lsn; |
|
uuid_t bb_uuid; |
|
__be32 bb_owner; |
|
__le32 bb_crc; |
|
}; |
|
|
|
/* long form block header */ |
|
struct xfs_btree_block_lhdr { |
|
__be64 bb_leftsib; |
|
__be64 bb_rightsib; |
|
|
|
__be64 bb_blkno; |
|
__be64 bb_lsn; |
|
uuid_t bb_uuid; |
|
__be64 bb_owner; |
|
__le32 bb_crc; |
|
__be32 bb_pad; /* padding for alignment */ |
|
}; |
|
|
|
struct xfs_btree_block { |
|
__be32 bb_magic; /* magic number for block type */ |
|
__be16 bb_level; /* 0 is a leaf */ |
|
__be16 bb_numrecs; /* current # of data records */ |
|
union { |
|
struct xfs_btree_block_shdr s; |
|
struct xfs_btree_block_lhdr l; |
|
} bb_u; /* rest */ |
|
}; |
|
|
|
/* size of a short form block */ |
|
#define XFS_BTREE_SBLOCK_LEN \ |
|
(offsetof(struct xfs_btree_block, bb_u) + \ |
|
offsetof(struct xfs_btree_block_shdr, bb_blkno)) |
|
/* size of a long form block */ |
|
#define XFS_BTREE_LBLOCK_LEN \ |
|
(offsetof(struct xfs_btree_block, bb_u) + \ |
|
offsetof(struct xfs_btree_block_lhdr, bb_blkno)) |
|
|
|
/* sizes of CRC enabled btree blocks */ |
|
#define XFS_BTREE_SBLOCK_CRC_LEN \ |
|
(offsetof(struct xfs_btree_block, bb_u) + \ |
|
sizeof(struct xfs_btree_block_shdr)) |
|
#define XFS_BTREE_LBLOCK_CRC_LEN \ |
|
(offsetof(struct xfs_btree_block, bb_u) + \ |
|
sizeof(struct xfs_btree_block_lhdr)) |
|
|
|
#define XFS_BTREE_SBLOCK_CRC_OFF \ |
|
offsetof(struct xfs_btree_block, bb_u.s.bb_crc) |
|
#define XFS_BTREE_LBLOCK_CRC_OFF \ |
|
offsetof(struct xfs_btree_block, bb_u.l.bb_crc) |
|
|
|
/* |
|
* On-disk XFS access control list structure. |
|
*/ |
|
struct xfs_acl_entry { |
|
__be32 ae_tag; |
|
__be32 ae_id; |
|
__be16 ae_perm; |
|
__be16 ae_pad; /* fill the implicit hole in the structure */ |
|
}; |
|
|
|
struct xfs_acl { |
|
__be32 acl_cnt; |
|
struct xfs_acl_entry acl_entry[]; |
|
}; |
|
|
|
/* |
|
* The number of ACL entries allowed is defined by the on-disk format. |
|
* For v4 superblocks, that is limited to 25 entries. For v5 superblocks, it is |
|
* limited only by the maximum size of the xattr that stores the information. |
|
*/ |
|
#define XFS_ACL_MAX_ENTRIES(mp) \ |
|
(xfs_sb_version_hascrc(&mp->m_sb) \ |
|
? (XFS_XATTR_SIZE_MAX - sizeof(struct xfs_acl)) / \ |
|
sizeof(struct xfs_acl_entry) \ |
|
: 25) |
|
|
|
#define XFS_ACL_SIZE(cnt) \ |
|
(sizeof(struct xfs_acl) + \ |
|
sizeof(struct xfs_acl_entry) * cnt) |
|
|
|
#define XFS_ACL_MAX_SIZE(mp) \ |
|
XFS_ACL_SIZE(XFS_ACL_MAX_ENTRIES((mp))) |
|
|
|
|
|
/* On-disk XFS extended attribute names */ |
|
#define SGI_ACL_FILE "SGI_ACL_FILE" |
|
#define SGI_ACL_DEFAULT "SGI_ACL_DEFAULT" |
|
#define SGI_ACL_FILE_SIZE (sizeof(SGI_ACL_FILE)-1) |
|
#define SGI_ACL_DEFAULT_SIZE (sizeof(SGI_ACL_DEFAULT)-1) |
|
|
|
#endif /* __XFS_FORMAT_H__ */
|
|
|