1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Copyright (c) 2021-2024 Oracle. All Rights Reserved. 4 * Author: Darrick J. Wong <djwong@kernel.org> 5 */ 6 #ifndef __XFS_SCRUB_ISCAN_H__ 7 #define __XFS_SCRUB_ISCAN_H__ 8 9 struct xchk_iscan { 10 struct xfs_scrub *sc; 11 12 /* Lock to protect the scan cursor. */ 13 struct mutex lock; 14 15 /* 16 * This is the first inode in the inumber address space that we 17 * examined. When the scan wraps around back to here, the scan is 18 * finished. 19 */ 20 xfs_ino_t scan_start_ino; 21 22 /* This is the inode that will be examined next. */ 23 xfs_ino_t cursor_ino; 24 25 /* If nonzero and non-NULL, skip this inode when scanning. */ 26 xfs_ino_t skip_ino; 27 28 /* 29 * This is the last inode that we've successfully scanned, either 30 * because the caller scanned it, or we moved the cursor past an empty 31 * part of the inode address space. Scan callers should only use the 32 * xchk_iscan_visit function to modify this. 33 */ 34 xfs_ino_t __visited_ino; 35 36 /* Operational state of the livescan. */ 37 unsigned long __opstate; 38 39 /* Give up on iterating @cursor_ino if we can't iget it by this time. */ 40 unsigned long __iget_deadline; 41 42 /* Amount of time (in ms) that we will try to iget an inode. */ 43 unsigned int iget_timeout; 44 45 /* Wait this many ms to retry an iget. */ 46 unsigned int iget_retry_delay; 47 48 /* 49 * The scan grabs batches of inodes and stashes them here before 50 * handing them out with _iter. Unallocated inodes are set in the 51 * mask so that all updates to that inode are selected for live 52 * update propagation. 53 */ 54 xfs_ino_t __batch_ino; 55 xfs_inofree_t __skipped_inomask; 56 struct xfs_inode *__inodes[XFS_INODES_PER_CHUNK]; 57 }; 58 59 /* Set if the scan has been aborted due to some event in the fs. */ 60 #define XCHK_ISCAN_OPSTATE_ABORTED (1) 61 62 static inline bool 63 xchk_iscan_aborted(const struct xchk_iscan *iscan) 64 { 65 return test_bit(XCHK_ISCAN_OPSTATE_ABORTED, &iscan->__opstate); 66 } 67 68 static inline void 69 xchk_iscan_abort(struct xchk_iscan *iscan) 70 { 71 set_bit(XCHK_ISCAN_OPSTATE_ABORTED, &iscan->__opstate); 72 } 73 74 void xchk_iscan_start(struct xfs_scrub *sc, unsigned int iget_timeout, 75 unsigned int iget_retry_delay, struct xchk_iscan *iscan); 76 void xchk_iscan_teardown(struct xchk_iscan *iscan); 77 78 int xchk_iscan_iter(struct xchk_iscan *iscan, struct xfs_inode **ipp); 79 void xchk_iscan_iter_finish(struct xchk_iscan *iscan); 80 81 void xchk_iscan_mark_visited(struct xchk_iscan *iscan, struct xfs_inode *ip); 82 bool xchk_iscan_want_live_update(struct xchk_iscan *iscan, xfs_ino_t ino); 83 84 #endif /* __XFS_SCRUB_ISCAN_H__ */ 85