13addd248SDarrick J. Wong /* SPDX-License-Identifier: GPL-2.0-or-later */ 23addd248SDarrick J. Wong /* 33addd248SDarrick J. Wong * Copyright (C) 2019 Oracle. All Rights Reserved. 43addd248SDarrick J. Wong * Author: Darrick J. Wong <darrick.wong@oracle.com> 53addd248SDarrick J. Wong */ 63addd248SDarrick J. Wong #ifndef __XFS_SCRUB_ATTR_H__ 73addd248SDarrick J. Wong #define __XFS_SCRUB_ATTR_H__ 83addd248SDarrick J. Wong 93addd248SDarrick J. Wong /* 103addd248SDarrick J. Wong * Temporary storage for online scrub and repair of extended attributes. 113addd248SDarrick J. Wong */ 123addd248SDarrick J. Wong struct xchk_xattr_buf { 133addd248SDarrick J. Wong /* 143addd248SDarrick J. Wong * Memory buffer -- either used for extracting attr values while 153addd248SDarrick J. Wong * walking the attributes; or for computing attr block bitmaps when 163addd248SDarrick J. Wong * checking the attribute tree. 173addd248SDarrick J. Wong * 183addd248SDarrick J. Wong * Each bitmap contains enough bits to track every byte in an attr 193addd248SDarrick J. Wong * block (rounded up to the size of an unsigned long). The attr block 203addd248SDarrick J. Wong * used space bitmap starts at the beginning of the buffer; the free 213addd248SDarrick J. Wong * space bitmap follows immediately after; and we have a third buffer 223addd248SDarrick J. Wong * for storing intermediate bitmap results. 233addd248SDarrick J. Wong */ 243addd248SDarrick J. Wong uint8_t buf[0]; 253addd248SDarrick J. Wong }; 263addd248SDarrick J. Wong 273addd248SDarrick J. Wong /* A place to store attribute values. */ 283addd248SDarrick J. Wong static inline uint8_t * 293addd248SDarrick J. Wong xchk_xattr_valuebuf( 303addd248SDarrick J. Wong struct xfs_scrub *sc) 313addd248SDarrick J. Wong { 323addd248SDarrick J. Wong struct xchk_xattr_buf *ab = sc->buf; 333addd248SDarrick J. Wong 343addd248SDarrick J. Wong return ab->buf; 353addd248SDarrick J. Wong } 363addd248SDarrick J. Wong 373addd248SDarrick J. Wong /* A bitmap of space usage computed by walking an attr leaf block. */ 383addd248SDarrick J. Wong static inline unsigned long * 393addd248SDarrick J. Wong xchk_xattr_usedmap( 403addd248SDarrick J. Wong struct xfs_scrub *sc) 413addd248SDarrick J. Wong { 423addd248SDarrick J. Wong struct xchk_xattr_buf *ab = sc->buf; 433addd248SDarrick J. Wong 443addd248SDarrick J. Wong return (unsigned long *)ab->buf; 453addd248SDarrick J. Wong } 463addd248SDarrick J. Wong 473addd248SDarrick J. Wong /* A bitmap of free space computed by walking attr leaf block free info. */ 483addd248SDarrick J. Wong static inline unsigned long * 493addd248SDarrick J. Wong xchk_xattr_freemap( 503addd248SDarrick J. Wong struct xfs_scrub *sc) 513addd248SDarrick J. Wong { 523addd248SDarrick J. Wong return xchk_xattr_usedmap(sc) + 533addd248SDarrick J. Wong BITS_TO_LONGS(sc->mp->m_attr_geo->blksize); 543addd248SDarrick J. Wong } 553addd248SDarrick J. Wong 563addd248SDarrick J. Wong /* A bitmap used to hold temporary results. */ 573addd248SDarrick J. Wong static inline unsigned long * 583addd248SDarrick J. Wong xchk_xattr_dstmap( 593addd248SDarrick J. Wong struct xfs_scrub *sc) 603addd248SDarrick J. Wong { 613addd248SDarrick J. Wong return xchk_xattr_freemap(sc) + 623addd248SDarrick J. Wong BITS_TO_LONGS(sc->mp->m_attr_geo->blksize); 633addd248SDarrick J. Wong } 643addd248SDarrick J. Wong 653addd248SDarrick J. Wong #endif /* __XFS_SCRUB_ATTR_H__ */ 66