1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (C) 2017-2023 Oracle. All Rights Reserved. 4 * Author: Darrick J. Wong <djwong@kernel.org> 5 */ 6 #ifndef __XFS_SCRUB_COMMON_H__ 7 #define __XFS_SCRUB_COMMON_H__ 8 9 /* 10 * We /could/ terminate a scrub/repair operation early. If we're not 11 * in a good place to continue (fatal signal, etc.) then bail out. 12 * Note that we're careful not to make any judgements about *error. 13 */ 14 static inline bool 15 xchk_should_terminate( 16 struct xfs_scrub *sc, 17 int *error) 18 { 19 /* 20 * If preemption is disabled, we need to yield to the scheduler every 21 * few seconds so that we don't run afoul of the soft lockup watchdog 22 * or RCU stall detector. 23 */ 24 cond_resched(); 25 26 if (fatal_signal_pending(current)) { 27 if (*error == 0) 28 *error = -EINTR; 29 return true; 30 } 31 return false; 32 } 33 34 int xchk_trans_alloc(struct xfs_scrub *sc, uint resblks); 35 void xchk_trans_cancel(struct xfs_scrub *sc); 36 37 bool xchk_process_error(struct xfs_scrub *sc, xfs_agnumber_t agno, 38 xfs_agblock_t bno, int *error); 39 bool xchk_fblock_process_error(struct xfs_scrub *sc, int whichfork, 40 xfs_fileoff_t offset, int *error); 41 42 bool xchk_xref_process_error(struct xfs_scrub *sc, 43 xfs_agnumber_t agno, xfs_agblock_t bno, int *error); 44 bool xchk_fblock_xref_process_error(struct xfs_scrub *sc, 45 int whichfork, xfs_fileoff_t offset, int *error); 46 47 void xchk_block_set_preen(struct xfs_scrub *sc, 48 struct xfs_buf *bp); 49 void xchk_ino_set_preen(struct xfs_scrub *sc, xfs_ino_t ino); 50 51 void xchk_set_corrupt(struct xfs_scrub *sc); 52 void xchk_block_set_corrupt(struct xfs_scrub *sc, 53 struct xfs_buf *bp); 54 void xchk_ino_set_corrupt(struct xfs_scrub *sc, xfs_ino_t ino); 55 void xchk_fblock_set_corrupt(struct xfs_scrub *sc, int whichfork, 56 xfs_fileoff_t offset); 57 58 void xchk_block_xref_set_corrupt(struct xfs_scrub *sc, 59 struct xfs_buf *bp); 60 void xchk_ino_xref_set_corrupt(struct xfs_scrub *sc, 61 xfs_ino_t ino); 62 void xchk_fblock_xref_set_corrupt(struct xfs_scrub *sc, 63 int whichfork, xfs_fileoff_t offset); 64 65 void xchk_ino_set_warning(struct xfs_scrub *sc, xfs_ino_t ino); 66 void xchk_fblock_set_warning(struct xfs_scrub *sc, int whichfork, 67 xfs_fileoff_t offset); 68 69 void xchk_set_incomplete(struct xfs_scrub *sc); 70 int xchk_checkpoint_log(struct xfs_mount *mp); 71 72 /* Are we set up for a cross-referencing check? */ 73 bool xchk_should_check_xref(struct xfs_scrub *sc, int *error, 74 struct xfs_btree_cur **curpp); 75 76 /* Setup functions */ 77 int xchk_setup_agheader(struct xfs_scrub *sc); 78 int xchk_setup_fs(struct xfs_scrub *sc); 79 int xchk_setup_ag_allocbt(struct xfs_scrub *sc); 80 int xchk_setup_ag_iallocbt(struct xfs_scrub *sc); 81 int xchk_setup_ag_rmapbt(struct xfs_scrub *sc); 82 int xchk_setup_ag_refcountbt(struct xfs_scrub *sc); 83 int xchk_setup_inode(struct xfs_scrub *sc); 84 int xchk_setup_inode_bmap(struct xfs_scrub *sc); 85 int xchk_setup_inode_bmap_data(struct xfs_scrub *sc); 86 int xchk_setup_directory(struct xfs_scrub *sc); 87 int xchk_setup_xattr(struct xfs_scrub *sc); 88 int xchk_setup_symlink(struct xfs_scrub *sc); 89 int xchk_setup_parent(struct xfs_scrub *sc); 90 #ifdef CONFIG_XFS_RT 91 int xchk_setup_rt(struct xfs_scrub *sc); 92 #else 93 static inline int 94 xchk_setup_rt(struct xfs_scrub *sc) 95 { 96 return -ENOENT; 97 } 98 #endif 99 #ifdef CONFIG_XFS_QUOTA 100 int xchk_setup_quota(struct xfs_scrub *sc); 101 #else 102 static inline int 103 xchk_setup_quota(struct xfs_scrub *sc) 104 { 105 return -ENOENT; 106 } 107 #endif 108 int xchk_setup_fscounters(struct xfs_scrub *sc); 109 110 void xchk_ag_free(struct xfs_scrub *sc, struct xchk_ag *sa); 111 int xchk_ag_init(struct xfs_scrub *sc, xfs_agnumber_t agno, 112 struct xchk_ag *sa); 113 114 /* 115 * Grab all AG resources, treating the inability to grab the perag structure as 116 * a fs corruption. This is intended for callers checking an ondisk reference 117 * to a given AG, which means that the AG must still exist. 118 */ 119 static inline int 120 xchk_ag_init_existing( 121 struct xfs_scrub *sc, 122 xfs_agnumber_t agno, 123 struct xchk_ag *sa) 124 { 125 int error = xchk_ag_init(sc, agno, sa); 126 127 return error == -ENOENT ? -EFSCORRUPTED : error; 128 } 129 130 int xchk_ag_read_headers(struct xfs_scrub *sc, xfs_agnumber_t agno, 131 struct xchk_ag *sa); 132 void xchk_ag_btcur_free(struct xchk_ag *sa); 133 void xchk_ag_btcur_init(struct xfs_scrub *sc, struct xchk_ag *sa); 134 int xchk_count_rmap_ownedby_ag(struct xfs_scrub *sc, struct xfs_btree_cur *cur, 135 const struct xfs_owner_info *oinfo, xfs_filblks_t *blocks); 136 137 int xchk_setup_ag_btree(struct xfs_scrub *sc, bool force_log); 138 int xchk_iget_for_scrubbing(struct xfs_scrub *sc); 139 int xchk_setup_inode_contents(struct xfs_scrub *sc, unsigned int resblks); 140 void xchk_buffer_recheck(struct xfs_scrub *sc, struct xfs_buf *bp); 141 142 int xchk_iget(struct xfs_scrub *sc, xfs_ino_t inum, struct xfs_inode **ipp); 143 int xchk_iget_agi(struct xfs_scrub *sc, xfs_ino_t inum, 144 struct xfs_buf **agi_bpp, struct xfs_inode **ipp); 145 void xchk_irele(struct xfs_scrub *sc, struct xfs_inode *ip); 146 int xchk_install_handle_inode(struct xfs_scrub *sc, struct xfs_inode *ip); 147 148 /* 149 * Don't bother cross-referencing if we already found corruption or cross 150 * referencing discrepancies. 151 */ 152 static inline bool xchk_skip_xref(struct xfs_scrub_metadata *sm) 153 { 154 return sm->sm_flags & (XFS_SCRUB_OFLAG_CORRUPT | 155 XFS_SCRUB_OFLAG_XCORRUPT); 156 } 157 158 int xchk_metadata_inode_forks(struct xfs_scrub *sc); 159 160 /* 161 * Setting up a hook to wait for intents to drain is costly -- we have to take 162 * the CPU hotplug lock and force an i-cache flush on all CPUs once to set it 163 * up, and again to tear it down. These costs add up quickly, so we only want 164 * to enable the drain waiter if the drain actually detected a conflict with 165 * running intent chains. 166 */ 167 static inline bool xchk_need_intent_drain(struct xfs_scrub *sc) 168 { 169 return sc->flags & XCHK_NEED_DRAIN; 170 } 171 172 void xchk_fsgates_enable(struct xfs_scrub *sc, unsigned int scrub_fshooks); 173 174 #endif /* __XFS_SCRUB_COMMON_H__ */ 175