1 // SPDX-License-Identifier: GPL-2.0-or-later 1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /* 2 /*
3 * Copyright (C) 2019-2023 Oracle. All Rights 3 * Copyright (C) 2019-2023 Oracle. All Rights Reserved.
4 * Author: Darrick J. Wong <djwong@kernel.org> 4 * Author: Darrick J. Wong <djwong@kernel.org>
5 */ 5 */
6 #include "xfs.h" 6 #include "xfs.h"
7 #include "xfs_fs.h" 7 #include "xfs_fs.h"
8 #include "xfs_shared.h" 8 #include "xfs_shared.h"
9 #include "xfs_format.h" 9 #include "xfs_format.h"
10 #include "xfs_trans_resv.h" 10 #include "xfs_trans_resv.h"
11 #include "xfs_mount.h" 11 #include "xfs_mount.h"
12 #include "xfs_btree.h" 12 #include "xfs_btree.h"
13 #include "xfs_ag.h" 13 #include "xfs_ag.h"
14 #include "xfs_health.h" 14 #include "xfs_health.h"
15 #include "scrub/scrub.h" 15 #include "scrub/scrub.h"
16 #include "scrub/health.h" 16 #include "scrub/health.h"
17 #include "scrub/common.h" 17 #include "scrub/common.h"
18 18
19 /* 19 /*
20 * Scrub and In-Core Filesystem Health Assessm 20 * Scrub and In-Core Filesystem Health Assessments
21 * =========================================== 21 * ===============================================
22 * 22 *
23 * Online scrub and repair have the time and t 23 * Online scrub and repair have the time and the ability to perform stronger
24 * checks than we can do from the metadata ver 24 * checks than we can do from the metadata verifiers, because they can
25 * cross-reference records between data struct 25 * cross-reference records between data structures. Therefore, scrub is in a
26 * good position to update the online filesyst 26 * good position to update the online filesystem health assessments to reflect
27 * the good/bad state of the data structure. 27 * the good/bad state of the data structure.
28 * 28 *
29 * We therefore extend scrub in the following 29 * We therefore extend scrub in the following ways to achieve this:
30 * 30 *
31 * 1. Create a "sick_mask" field in the scrub 31 * 1. Create a "sick_mask" field in the scrub context. When we're setting up a
32 * scrub call, set this to the default XFS_SIC 32 * scrub call, set this to the default XFS_SICK_* flag(s) for the selected
33 * scrub type (call it A). Scrub and repair f 33 * scrub type (call it A). Scrub and repair functions can override the default
34 * sick_mask value if they choose. 34 * sick_mask value if they choose.
35 * 35 *
36 * 2. If the scrubber returns a runtime error 36 * 2. If the scrubber returns a runtime error code, we exit making no changes
37 * to the incore sick state. 37 * to the incore sick state.
38 * 38 *
39 * 3. If the scrubber finds that A is clean, u 39 * 3. If the scrubber finds that A is clean, use sick_mask to clear the incore
40 * sick flags before exiting. 40 * sick flags before exiting.
41 * 41 *
42 * 4. If the scrubber finds that A is corrupt, 42 * 4. If the scrubber finds that A is corrupt, use sick_mask to set the incore
43 * sick flags. If the user didn't want to rep 43 * sick flags. If the user didn't want to repair then we exit, leaving the
44 * metadata structure unfixed and the sick fla 44 * metadata structure unfixed and the sick flag set.
45 * 45 *
46 * 5. Now we know that A is corrupt and the us 46 * 5. Now we know that A is corrupt and the user wants to repair, so run the
47 * repairer. If the repairer returns an error 47 * repairer. If the repairer returns an error code, we exit with that error
48 * code, having made no further changes to the 48 * code, having made no further changes to the incore sick state.
49 * 49 *
50 * 6. If repair rebuilds A correctly and the s 50 * 6. If repair rebuilds A correctly and the subsequent re-scrub of A is clean,
51 * use sick_mask to clear the incore sick flag 51 * use sick_mask to clear the incore sick flags. This should have the effect
52 * that A is no longer marked sick. 52 * that A is no longer marked sick.
53 * 53 *
54 * 7. If repair rebuilds A incorrectly, the re 54 * 7. If repair rebuilds A incorrectly, the re-scrub will find it corrupt and
55 * use sick_mask to set the incore sick flags. 55 * use sick_mask to set the incore sick flags. This should have no externally
56 * visible effect since we already set them in 56 * visible effect since we already set them in step (4).
57 * 57 *
58 * There are some complications to this story, 58 * There are some complications to this story, however. For certain types of
59 * complementary metadata indices (e.g. inobt/ 59 * complementary metadata indices (e.g. inobt/finobt), it is easier to rebuild
60 * both structures at the same time. The foll 60 * both structures at the same time. The following principles apply to this
61 * type of repair strategy: 61 * type of repair strategy:
62 * 62 *
63 * 8. Any repair function that rebuilds multip 63 * 8. Any repair function that rebuilds multiple structures should update
64 * sick_mask_visible to reflect whatever other 64 * sick_mask_visible to reflect whatever other structures are rebuilt, and
65 * verify that all the rebuilt structures can 65 * verify that all the rebuilt structures can pass a scrub check. The outcomes
66 * of 5-7 still apply, but with a sick_mask th 66 * of 5-7 still apply, but with a sick_mask that covers everything being
67 * rebuilt. 67 * rebuilt.
68 */ 68 */
69 69
70 /* Map our scrub type to a sick mask and a set 70 /* Map our scrub type to a sick mask and a set of health update functions. */
71 71
72 enum xchk_health_group { 72 enum xchk_health_group {
73 XHG_FS = 1, 73 XHG_FS = 1,
74 XHG_RT, 74 XHG_RT,
75 XHG_AG, 75 XHG_AG,
76 XHG_INO, 76 XHG_INO,
77 }; 77 };
78 78
79 struct xchk_health_map { 79 struct xchk_health_map {
80 enum xchk_health_group group; 80 enum xchk_health_group group;
81 unsigned int sick_mask; 81 unsigned int sick_mask;
82 }; 82 };
83 83
84 static const struct xchk_health_map type_to_he 84 static const struct xchk_health_map type_to_health_flag[XFS_SCRUB_TYPE_NR] = {
85 [XFS_SCRUB_TYPE_SB] = { XH 85 [XFS_SCRUB_TYPE_SB] = { XHG_AG, XFS_SICK_AG_SB },
86 [XFS_SCRUB_TYPE_AGF] = { XH 86 [XFS_SCRUB_TYPE_AGF] = { XHG_AG, XFS_SICK_AG_AGF },
87 [XFS_SCRUB_TYPE_AGFL] = { XH 87 [XFS_SCRUB_TYPE_AGFL] = { XHG_AG, XFS_SICK_AG_AGFL },
88 [XFS_SCRUB_TYPE_AGI] = { XH 88 [XFS_SCRUB_TYPE_AGI] = { XHG_AG, XFS_SICK_AG_AGI },
89 [XFS_SCRUB_TYPE_BNOBT] = { XH 89 [XFS_SCRUB_TYPE_BNOBT] = { XHG_AG, XFS_SICK_AG_BNOBT },
90 [XFS_SCRUB_TYPE_CNTBT] = { XH 90 [XFS_SCRUB_TYPE_CNTBT] = { XHG_AG, XFS_SICK_AG_CNTBT },
91 [XFS_SCRUB_TYPE_INOBT] = { XH 91 [XFS_SCRUB_TYPE_INOBT] = { XHG_AG, XFS_SICK_AG_INOBT },
92 [XFS_SCRUB_TYPE_FINOBT] = { XH 92 [XFS_SCRUB_TYPE_FINOBT] = { XHG_AG, XFS_SICK_AG_FINOBT },
93 [XFS_SCRUB_TYPE_RMAPBT] = { XH 93 [XFS_SCRUB_TYPE_RMAPBT] = { XHG_AG, XFS_SICK_AG_RMAPBT },
94 [XFS_SCRUB_TYPE_REFCNTBT] = { XH 94 [XFS_SCRUB_TYPE_REFCNTBT] = { XHG_AG, XFS_SICK_AG_REFCNTBT },
95 [XFS_SCRUB_TYPE_INODE] = { XH 95 [XFS_SCRUB_TYPE_INODE] = { XHG_INO, XFS_SICK_INO_CORE },
96 [XFS_SCRUB_TYPE_BMBTD] = { XH 96 [XFS_SCRUB_TYPE_BMBTD] = { XHG_INO, XFS_SICK_INO_BMBTD },
97 [XFS_SCRUB_TYPE_BMBTA] = { XH 97 [XFS_SCRUB_TYPE_BMBTA] = { XHG_INO, XFS_SICK_INO_BMBTA },
98 [XFS_SCRUB_TYPE_BMBTC] = { XH 98 [XFS_SCRUB_TYPE_BMBTC] = { XHG_INO, XFS_SICK_INO_BMBTC },
99 [XFS_SCRUB_TYPE_DIR] = { XH 99 [XFS_SCRUB_TYPE_DIR] = { XHG_INO, XFS_SICK_INO_DIR },
100 [XFS_SCRUB_TYPE_XATTR] = { XH 100 [XFS_SCRUB_TYPE_XATTR] = { XHG_INO, XFS_SICK_INO_XATTR },
101 [XFS_SCRUB_TYPE_SYMLINK] = { XH 101 [XFS_SCRUB_TYPE_SYMLINK] = { XHG_INO, XFS_SICK_INO_SYMLINK },
102 [XFS_SCRUB_TYPE_PARENT] = { XH 102 [XFS_SCRUB_TYPE_PARENT] = { XHG_INO, XFS_SICK_INO_PARENT },
103 [XFS_SCRUB_TYPE_RTBITMAP] = { XH 103 [XFS_SCRUB_TYPE_RTBITMAP] = { XHG_RT, XFS_SICK_RT_BITMAP },
104 [XFS_SCRUB_TYPE_RTSUM] = { XH 104 [XFS_SCRUB_TYPE_RTSUM] = { XHG_RT, XFS_SICK_RT_SUMMARY },
105 [XFS_SCRUB_TYPE_UQUOTA] = { XH 105 [XFS_SCRUB_TYPE_UQUOTA] = { XHG_FS, XFS_SICK_FS_UQUOTA },
106 [XFS_SCRUB_TYPE_GQUOTA] = { XH 106 [XFS_SCRUB_TYPE_GQUOTA] = { XHG_FS, XFS_SICK_FS_GQUOTA },
107 [XFS_SCRUB_TYPE_PQUOTA] = { XH 107 [XFS_SCRUB_TYPE_PQUOTA] = { XHG_FS, XFS_SICK_FS_PQUOTA },
108 [XFS_SCRUB_TYPE_FSCOUNTERS] = { XH 108 [XFS_SCRUB_TYPE_FSCOUNTERS] = { XHG_FS, XFS_SICK_FS_COUNTERS },
109 [XFS_SCRUB_TYPE_QUOTACHECK] = { XH 109 [XFS_SCRUB_TYPE_QUOTACHECK] = { XHG_FS, XFS_SICK_FS_QUOTACHECK },
110 [XFS_SCRUB_TYPE_NLINKS] = { XH 110 [XFS_SCRUB_TYPE_NLINKS] = { XHG_FS, XFS_SICK_FS_NLINKS },
111 [XFS_SCRUB_TYPE_DIRTREE] = { XH 111 [XFS_SCRUB_TYPE_DIRTREE] = { XHG_INO, XFS_SICK_INO_DIRTREE },
112 }; 112 };
113 113
114 /* Return the health status mask for this scru 114 /* Return the health status mask for this scrub type. */
115 unsigned int 115 unsigned int
116 xchk_health_mask_for_scrub_type( 116 xchk_health_mask_for_scrub_type(
117 __u32 scrub_type) 117 __u32 scrub_type)
118 { 118 {
119 return type_to_health_flag[scrub_type] 119 return type_to_health_flag[scrub_type].sick_mask;
120 } 120 }
121 121
122 /* 122 /*
123 * If the scrub state is clean, add @mask to t 123 * If the scrub state is clean, add @mask to the scrub sick mask to clear
124 * additional sick flags from the metadata obj 124 * additional sick flags from the metadata object's sick state.
125 */ 125 */
126 void 126 void
127 xchk_mark_healthy_if_clean( 127 xchk_mark_healthy_if_clean(
128 struct xfs_scrub *sc, 128 struct xfs_scrub *sc,
129 unsigned int mask) 129 unsigned int mask)
130 { 130 {
131 if (!(sc->sm->sm_flags & (XFS_SCRUB_OF 131 if (!(sc->sm->sm_flags & (XFS_SCRUB_OFLAG_CORRUPT |
132 XFS_SCRUB_OF 132 XFS_SCRUB_OFLAG_XCORRUPT)))
133 sc->sick_mask |= mask; 133 sc->sick_mask |= mask;
134 } 134 }
135 135
136 /* 136 /*
137 * If we're scrubbing a piece of file metadata 137 * If we're scrubbing a piece of file metadata for the first time, does it look
138 * like it has been zapped? Skip the check if 138 * like it has been zapped? Skip the check if we just repaired the metadata
139 * and are revalidating it. 139 * and are revalidating it.
140 */ 140 */
141 bool 141 bool
142 xchk_file_looks_zapped( 142 xchk_file_looks_zapped(
143 struct xfs_scrub *sc, 143 struct xfs_scrub *sc,
144 unsigned int mask) 144 unsigned int mask)
145 { 145 {
146 ASSERT((mask & ~XFS_SICK_INO_ZAPPED) = 146 ASSERT((mask & ~XFS_SICK_INO_ZAPPED) == 0);
147 147
148 if (sc->flags & XREP_ALREADY_FIXED) 148 if (sc->flags & XREP_ALREADY_FIXED)
149 return false; 149 return false;
150 150
151 return xfs_inode_has_sickness(sc->ip, 151 return xfs_inode_has_sickness(sc->ip, mask);
152 } 152 }
153 153
154 /* 154 /*
155 * Scrub gave the filesystem a clean bill of h 155 * Scrub gave the filesystem a clean bill of health, so clear all the indirect
156 * markers of past problems (at least for the 156 * markers of past problems (at least for the fs and ags) so that we can be
157 * healthy again. 157 * healthy again.
158 */ 158 */
159 STATIC void 159 STATIC void
160 xchk_mark_all_healthy( 160 xchk_mark_all_healthy(
161 struct xfs_mount *mp) 161 struct xfs_mount *mp)
162 { 162 {
163 struct xfs_perag *pag; 163 struct xfs_perag *pag;
164 xfs_agnumber_t agno; 164 xfs_agnumber_t agno;
165 165
166 xfs_fs_mark_healthy(mp, XFS_SICK_FS_IN 166 xfs_fs_mark_healthy(mp, XFS_SICK_FS_INDIRECT);
167 xfs_rt_mark_healthy(mp, XFS_SICK_RT_IN 167 xfs_rt_mark_healthy(mp, XFS_SICK_RT_INDIRECT);
168 for_each_perag(mp, agno, pag) 168 for_each_perag(mp, agno, pag)
169 xfs_ag_mark_healthy(pag, XFS_S 169 xfs_ag_mark_healthy(pag, XFS_SICK_AG_INDIRECT);
170 } 170 }
171 171
172 /* 172 /*
173 * Update filesystem health assessments based 173 * Update filesystem health assessments based on what we found and did.
174 * 174 *
175 * If the scrubber finds errors, we mark sick 175 * If the scrubber finds errors, we mark sick whatever's mentioned in
176 * sick_mask, no matter whether this is a firs 176 * sick_mask, no matter whether this is a first scan or an
177 * evaluation of repair effectiveness. 177 * evaluation of repair effectiveness.
178 * 178 *
179 * Otherwise, no direct corruption was found, 179 * Otherwise, no direct corruption was found, so mark whatever's in
180 * sick_mask as healthy. 180 * sick_mask as healthy.
181 */ 181 */
182 void 182 void
183 xchk_update_health( 183 xchk_update_health(
184 struct xfs_scrub *sc) 184 struct xfs_scrub *sc)
185 { 185 {
186 struct xfs_perag *pag; 186 struct xfs_perag *pag;
187 bool bad; 187 bool bad;
188 188
189 /* 189 /*
190 * The HEALTHY scrub type is a request 190 * The HEALTHY scrub type is a request from userspace to clear all the
191 * indirect flags after a clean scan o 191 * indirect flags after a clean scan of the entire filesystem. As such
192 * there's no sick flag defined for it 192 * there's no sick flag defined for it, so we branch here ahead of the
193 * mask check. 193 * mask check.
194 */ 194 */
195 if (sc->sm->sm_type == XFS_SCRUB_TYPE_ 195 if (sc->sm->sm_type == XFS_SCRUB_TYPE_HEALTHY &&
196 !(sc->sm->sm_flags & XFS_SCRUB_OFL 196 !(sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)) {
197 xchk_mark_all_healthy(sc->mp); 197 xchk_mark_all_healthy(sc->mp);
198 return; 198 return;
199 } 199 }
200 200
201 if (!sc->sick_mask) 201 if (!sc->sick_mask)
202 return; 202 return;
203 203
204 bad = (sc->sm->sm_flags & (XFS_SCRUB_O 204 bad = (sc->sm->sm_flags & (XFS_SCRUB_OFLAG_CORRUPT |
205 XFS_SCRUB_O 205 XFS_SCRUB_OFLAG_XCORRUPT));
206 switch (type_to_health_flag[sc->sm->sm 206 switch (type_to_health_flag[sc->sm->sm_type].group) {
207 case XHG_AG: 207 case XHG_AG:
208 pag = xfs_perag_get(sc->mp, sc 208 pag = xfs_perag_get(sc->mp, sc->sm->sm_agno);
209 if (bad) 209 if (bad)
210 xfs_ag_mark_corrupt(pa 210 xfs_ag_mark_corrupt(pag, sc->sick_mask);
211 else 211 else
212 xfs_ag_mark_healthy(pa 212 xfs_ag_mark_healthy(pag, sc->sick_mask);
213 xfs_perag_put(pag); 213 xfs_perag_put(pag);
214 break; 214 break;
215 case XHG_INO: 215 case XHG_INO:
216 if (!sc->ip) 216 if (!sc->ip)
217 return; 217 return;
218 if (bad) { 218 if (bad) {
219 unsigned int mask = 219 unsigned int mask = sc->sick_mask;
220 220
221 /* 221 /*
222 * If we're coming in 222 * If we're coming in for repairs then we don't want
223 * sickness flags to p 223 * sickness flags to propagate to the incore health
224 * status if the inode 224 * status if the inode gets inactivated before we can
225 * fix it. 225 * fix it.
226 */ 226 */
227 if (sc->sm->sm_flags & 227 if (sc->sm->sm_flags & XFS_SCRUB_IFLAG_REPAIR)
228 mask |= XFS_SI 228 mask |= XFS_SICK_INO_FORGET;
229 xfs_inode_mark_corrupt 229 xfs_inode_mark_corrupt(sc->ip, mask);
230 } else 230 } else
231 xfs_inode_mark_healthy 231 xfs_inode_mark_healthy(sc->ip, sc->sick_mask);
232 break; 232 break;
233 case XHG_FS: 233 case XHG_FS:
234 if (bad) 234 if (bad)
235 xfs_fs_mark_corrupt(sc 235 xfs_fs_mark_corrupt(sc->mp, sc->sick_mask);
236 else 236 else
237 xfs_fs_mark_healthy(sc 237 xfs_fs_mark_healthy(sc->mp, sc->sick_mask);
238 break; 238 break;
239 case XHG_RT: 239 case XHG_RT:
240 if (bad) 240 if (bad)
241 xfs_rt_mark_corrupt(sc 241 xfs_rt_mark_corrupt(sc->mp, sc->sick_mask);
242 else 242 else
243 xfs_rt_mark_healthy(sc 243 xfs_rt_mark_healthy(sc->mp, sc->sick_mask);
244 break; 244 break;
245 default: 245 default:
246 ASSERT(0); 246 ASSERT(0);
247 break; 247 break;
248 } 248 }
249 } 249 }
250 250
251 /* Is the given per-AG btree healthy enough fo 251 /* Is the given per-AG btree healthy enough for scanning? */
252 void 252 void
253 xchk_ag_btree_del_cursor_if_sick( 253 xchk_ag_btree_del_cursor_if_sick(
254 struct xfs_scrub *sc, 254 struct xfs_scrub *sc,
255 struct xfs_btree_cur **curp, 255 struct xfs_btree_cur **curp,
256 unsigned int sm_type) 256 unsigned int sm_type)
257 { 257 {
258 unsigned int mask = (*curp) 258 unsigned int mask = (*curp)->bc_ops->sick_mask;
259 259
260 /* 260 /*
261 * We always want the cursor if it's t 261 * We always want the cursor if it's the same type as whatever we're
262 * scrubbing, even if we already know 262 * scrubbing, even if we already know the structure is corrupt.
263 * 263 *
264 * Otherwise, we're only interested in 264 * Otherwise, we're only interested in the btree for cross-referencing.
265 * If we know the btree is bad then do 265 * If we know the btree is bad then don't bother, just set XFAIL.
266 */ 266 */
267 if (sc->sm->sm_type == sm_type) 267 if (sc->sm->sm_type == sm_type)
268 return; 268 return;
269 269
270 /* 270 /*
271 * If we just repaired some AG metadat 271 * If we just repaired some AG metadata, sc->sick_mask will reflect all
272 * the per-AG metadata types that were 272 * the per-AG metadata types that were repaired. Exclude these from
273 * the filesystem health query because 273 * the filesystem health query because we have not yet updated the
274 * health status and we want everythin 274 * health status and we want everything to be scanned.
275 */ 275 */
276 if ((sc->flags & XREP_ALREADY_FIXED) & 276 if ((sc->flags & XREP_ALREADY_FIXED) &&
277 type_to_health_flag[sc->sm->sm_typ 277 type_to_health_flag[sc->sm->sm_type].group == XHG_AG)
278 mask &= ~sc->sick_mask; 278 mask &= ~sc->sick_mask;
279 279
280 if (xfs_ag_has_sickness((*curp)->bc_ag 280 if (xfs_ag_has_sickness((*curp)->bc_ag.pag, mask)) {
281 sc->sm->sm_flags |= XFS_SCRUB_ 281 sc->sm->sm_flags |= XFS_SCRUB_OFLAG_XFAIL;
282 xfs_btree_del_cursor(*curp, XF 282 xfs_btree_del_cursor(*curp, XFS_BTREE_NOERROR);
283 *curp = NULL; 283 *curp = NULL;
284 } 284 }
285 } 285 }
286 286
287 /* 287 /*
288 * Quick scan to double-check that there isn't 288 * Quick scan to double-check that there isn't any evidence of lingering
289 * primary health problems. If we're still cl 289 * primary health problems. If we're still clear, then the health update will
290 * take care of clearing the indirect evidence 290 * take care of clearing the indirect evidence.
291 */ 291 */
292 int 292 int
293 xchk_health_record( 293 xchk_health_record(
294 struct xfs_scrub *sc) 294 struct xfs_scrub *sc)
295 { 295 {
296 struct xfs_mount *mp = sc->mp; 296 struct xfs_mount *mp = sc->mp;
297 struct xfs_perag *pag; 297 struct xfs_perag *pag;
298 xfs_agnumber_t agno; 298 xfs_agnumber_t agno;
299 299
300 unsigned int sick; 300 unsigned int sick;
301 unsigned int checked; 301 unsigned int checked;
302 302
303 xfs_fs_measure_sickness(mp, &sick, &ch 303 xfs_fs_measure_sickness(mp, &sick, &checked);
304 if (sick & XFS_SICK_FS_PRIMARY) 304 if (sick & XFS_SICK_FS_PRIMARY)
305 xchk_set_corrupt(sc); 305 xchk_set_corrupt(sc);
306 306
307 xfs_rt_measure_sickness(mp, &sick, &ch 307 xfs_rt_measure_sickness(mp, &sick, &checked);
308 if (sick & XFS_SICK_RT_PRIMARY) 308 if (sick & XFS_SICK_RT_PRIMARY)
309 xchk_set_corrupt(sc); 309 xchk_set_corrupt(sc);
310 310
311 for_each_perag(mp, agno, pag) { 311 for_each_perag(mp, agno, pag) {
312 xfs_ag_measure_sickness(pag, & 312 xfs_ag_measure_sickness(pag, &sick, &checked);
313 if (sick & XFS_SICK_AG_PRIMARY 313 if (sick & XFS_SICK_AG_PRIMARY)
314 xchk_set_corrupt(sc); 314 xchk_set_corrupt(sc);
315 } 315 }
316 316
317 return 0; 317 return 0;
318 } 318 }
319 319
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