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-rw-r--r--fs/xfs/xfs_dir2_format.h51
1 files changed, 20 insertions, 31 deletions
diff --git a/fs/xfs/xfs_dir2_format.h b/fs/xfs/xfs_dir2_format.h
index a0961a61ac1a..9cf67381adf6 100644
--- a/fs/xfs/xfs_dir2_format.h
+++ b/fs/xfs/xfs_dir2_format.h
@@ -497,69 +497,58 @@ xfs_dir3_data_unused_p(struct xfs_dir2_data_hdr *hdr)
497/* 497/*
498 * Offsets of . and .. in data space (always block 0) 498 * Offsets of . and .. in data space (always block 0)
499 * 499 *
500 * The macros are used for shortform directories as they have no headers to read
501 * the magic number out of. Shortform directories need to know the size of the
502 * data block header because the sfe embeds the block offset of the entry into
503 * it so that it doesn't change when format conversion occurs. Bad Things Happen
504 * if we don't follow this rule.
505 *
506 * XXX: there is scope for significant optimisation of the logic here. Right 500 * XXX: there is scope for significant optimisation of the logic here. Right
507 * now we are checking for "dir3 format" over and over again. Ideally we should 501 * now we are checking for "dir3 format" over and over again. Ideally we should
508 * only do it once for each operation. 502 * only do it once for each operation.
509 */ 503 */
510#define XFS_DIR3_DATA_DOT_OFFSET(mp) \
511 xfs_dir3_data_hdr_size(xfs_sb_version_hascrc(&(mp)->m_sb))
512#define XFS_DIR3_DATA_DOTDOT_OFFSET(mp) \
513 (XFS_DIR3_DATA_DOT_OFFSET(mp) + xfs_dir3_data_entsize(mp, 1))
514#define XFS_DIR3_DATA_FIRST_OFFSET(mp) \
515 (XFS_DIR3_DATA_DOTDOT_OFFSET(mp) + xfs_dir3_data_entsize(mp, 2))
516
517static inline xfs_dir2_data_aoff_t 504static inline xfs_dir2_data_aoff_t
518xfs_dir3_data_dot_offset(struct xfs_dir2_data_hdr *hdr) 505xfs_dir3_data_dot_offset(struct xfs_mount *mp)
519{ 506{
520 return xfs_dir3_data_entry_offset(hdr); 507 return xfs_dir3_data_hdr_size(xfs_sb_version_hascrc(&mp->m_sb));
521} 508}
522 509
523static inline xfs_dir2_data_aoff_t 510static inline xfs_dir2_data_aoff_t
524xfs_dir3_data_dotdot_offset(struct xfs_dir2_data_hdr *hdr) 511xfs_dir3_data_dotdot_offset(struct xfs_mount *mp)
525{ 512{
526 bool dir3 = hdr->magic == cpu_to_be32(XFS_DIR3_DATA_MAGIC) || 513 return xfs_dir3_data_dot_offset(mp) +
527 hdr->magic == cpu_to_be32(XFS_DIR3_BLOCK_MAGIC); 514 xfs_dir3_data_entsize(mp, 1);
528 return xfs_dir3_data_dot_offset(hdr) +
529 __xfs_dir3_data_entsize(dir3, 1);
530} 515}
531 516
532static inline xfs_dir2_data_aoff_t 517static inline xfs_dir2_data_aoff_t
533xfs_dir3_data_first_offset(struct xfs_dir2_data_hdr *hdr) 518xfs_dir3_data_first_offset(struct xfs_mount *mp)
534{ 519{
535 bool dir3 = hdr->magic == cpu_to_be32(XFS_DIR3_DATA_MAGIC) || 520 return xfs_dir3_data_dotdot_offset(mp) +
536 hdr->magic == cpu_to_be32(XFS_DIR3_BLOCK_MAGIC); 521 xfs_dir3_data_entsize(mp, 2);
537 return xfs_dir3_data_dotdot_offset(hdr) +
538 __xfs_dir3_data_entsize(dir3, 2);
539} 522}
540 523
541/* 524/*
542 * location of . and .. in data space (always block 0) 525 * location of . and .. in data space (always block 0)
543 */ 526 */
544static inline struct xfs_dir2_data_entry * 527static inline struct xfs_dir2_data_entry *
545xfs_dir3_data_dot_entry_p(struct xfs_dir2_data_hdr *hdr) 528xfs_dir3_data_dot_entry_p(
529 struct xfs_mount *mp,
530 struct xfs_dir2_data_hdr *hdr)
546{ 531{
547 return (struct xfs_dir2_data_entry *) 532 return (struct xfs_dir2_data_entry *)
548 ((char *)hdr + xfs_dir3_data_dot_offset(hdr)); 533 ((char *)hdr + xfs_dir3_data_dot_offset(mp));
549} 534}
550 535
551static inline struct xfs_dir2_data_entry * 536static inline struct xfs_dir2_data_entry *
552xfs_dir3_data_dotdot_entry_p(struct xfs_dir2_data_hdr *hdr) 537xfs_dir3_data_dotdot_entry_p(
538 struct xfs_mount *mp,
539 struct xfs_dir2_data_hdr *hdr)
553{ 540{
554 return (struct xfs_dir2_data_entry *) 541 return (struct xfs_dir2_data_entry *)
555 ((char *)hdr + xfs_dir3_data_dotdot_offset(hdr)); 542 ((char *)hdr + xfs_dir3_data_dotdot_offset(mp));
556} 543}
557 544
558static inline struct xfs_dir2_data_entry * 545static inline struct xfs_dir2_data_entry *
559xfs_dir3_data_first_entry_p(struct xfs_dir2_data_hdr *hdr) 546xfs_dir3_data_first_entry_p(
547 struct xfs_mount *mp,
548 struct xfs_dir2_data_hdr *hdr)
560{ 549{
561 return (struct xfs_dir2_data_entry *) 550 return (struct xfs_dir2_data_entry *)
562 ((char *)hdr + xfs_dir3_data_first_offset(hdr)); 551 ((char *)hdr + xfs_dir3_data_first_offset(mp));
563} 552}
564 553
565/* 554/*