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d7e09d03 PT |
1 | /* |
2 | * GPL HEADER START | |
3 | * | |
4 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 only, | |
8 | * as published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License version 2 for more details (a copy is included | |
14 | * in the LICENSE file that accompanied this code). | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * version 2 along with this program; If not, see | |
6a5b99a4 | 18 | * http://www.gnu.org/licenses/gpl-2.0.html |
d7e09d03 | 19 | * |
d7e09d03 PT |
20 | * GPL HEADER END |
21 | */ | |
22 | /* | |
23 | * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. | |
24 | * Use is subject to license terms. | |
25 | * | |
1dc563a6 | 26 | * Copyright (c) 2012, 2015, Intel Corporation. |
d7e09d03 PT |
27 | */ |
28 | /* | |
29 | * This file is part of Lustre, http://www.lustre.org/ | |
30 | * Lustre is a trademark of Sun Microsystems, Inc. | |
31 | * | |
32 | * lustre/obdclass/llog_cat.c | |
33 | * | |
34 | * OST<->MDS recovery logging infrastructure. | |
35 | * | |
36 | * Invariants in implementation: | |
37 | * - we do not share logs among different OST<->MDS connections, so that | |
38 | * if an OST or MDS fails it need only look at log(s) relevant to itself | |
39 | * | |
40 | * Author: Andreas Dilger <adilger@clusterfs.com> | |
41 | * Author: Alexey Zhuravlev <alexey.zhuravlev@intel.com> | |
42 | * Author: Mikhail Pershin <mike.pershin@intel.com> | |
43 | */ | |
44 | ||
45 | #define DEBUG_SUBSYSTEM S_LOG | |
46 | ||
610f7377 | 47 | #include "../include/obd_class.h" |
d7e09d03 PT |
48 | |
49 | #include "llog_internal.h" | |
50 | ||
d7e09d03 PT |
51 | /* Open an existent log handle and add it to the open list. |
52 | * This log handle will be closed when all of the records in it are removed. | |
53 | * | |
54 | * Assumes caller has already pushed us into the kernel context and is locking. | |
55 | * We return a lock on the handle to ensure nobody yanks it from us. | |
56 | * | |
57 | * This takes extra reference on llog_handle via llog_handle_get() and require | |
58 | * this reference to be put by caller using llog_handle_put() | |
59 | */ | |
17ad0ce6 SB |
60 | static int llog_cat_id2handle(const struct lu_env *env, |
61 | struct llog_handle *cathandle, | |
62 | struct llog_handle **res, | |
63 | struct llog_logid *logid) | |
d7e09d03 PT |
64 | { |
65 | struct llog_handle *loghandle; | |
66 | int rc = 0; | |
67 | ||
cce3c2da | 68 | if (!cathandle) |
0a3bdb00 | 69 | return -EBADF; |
d7e09d03 PT |
70 | |
71 | down_write(&cathandle->lgh_lock); | |
72 | list_for_each_entry(loghandle, &cathandle->u.chd.chd_head, | |
926d6fb2 | 73 | u.phd.phd_entry) { |
d7e09d03 PT |
74 | struct llog_logid *cgl = &loghandle->lgh_id; |
75 | ||
76 | if (ostid_id(&cgl->lgl_oi) == ostid_id(&logid->lgl_oi) && | |
77 | ostid_seq(&cgl->lgl_oi) == ostid_seq(&logid->lgl_oi)) { | |
78 | if (cgl->lgl_ogen != logid->lgl_ogen) { | |
79 | CERROR("%s: log "DOSTID" generation %x != %x\n", | |
80 | loghandle->lgh_ctxt->loc_obd->obd_name, | |
81 | POSTID(&logid->lgl_oi), cgl->lgl_ogen, | |
82 | logid->lgl_ogen); | |
83 | continue; | |
84 | } | |
85 | loghandle->u.phd.phd_cat_handle = cathandle; | |
86 | up_write(&cathandle->lgh_lock); | |
d212afd9 JL |
87 | rc = 0; |
88 | goto out; | |
d7e09d03 PT |
89 | } |
90 | } | |
91 | up_write(&cathandle->lgh_lock); | |
92 | ||
93 | rc = llog_open(env, cathandle->lgh_ctxt, &loghandle, logid, NULL, | |
94 | LLOG_OPEN_EXISTS); | |
95 | if (rc < 0) { | |
96 | CERROR("%s: error opening log id "DOSTID":%x: rc = %d\n", | |
97 | cathandle->lgh_ctxt->loc_obd->obd_name, | |
98 | POSTID(&logid->lgl_oi), logid->lgl_ogen, rc); | |
0a3bdb00 | 99 | return rc; |
d7e09d03 PT |
100 | } |
101 | ||
102 | rc = llog_init_handle(env, loghandle, LLOG_F_IS_PLAIN, NULL); | |
103 | if (rc < 0) { | |
104 | llog_close(env, loghandle); | |
105 | loghandle = NULL; | |
0a3bdb00 | 106 | return rc; |
d7e09d03 PT |
107 | } |
108 | ||
109 | down_write(&cathandle->lgh_lock); | |
110 | list_add(&loghandle->u.phd.phd_entry, &cathandle->u.chd.chd_head); | |
111 | up_write(&cathandle->lgh_lock); | |
112 | ||
113 | loghandle->u.phd.phd_cat_handle = cathandle; | |
114 | loghandle->u.phd.phd_cookie.lgc_lgl = cathandle->lgh_id; | |
115 | loghandle->u.phd.phd_cookie.lgc_index = | |
116 | loghandle->lgh_hdr->llh_cat_idx; | |
d7e09d03 PT |
117 | out: |
118 | llog_handle_get(loghandle); | |
119 | *res = loghandle; | |
120 | return 0; | |
121 | } | |
122 | ||
123 | int llog_cat_close(const struct lu_env *env, struct llog_handle *cathandle) | |
124 | { | |
125 | struct llog_handle *loghandle, *n; | |
d7e09d03 | 126 | |
d7e09d03 | 127 | list_for_each_entry_safe(loghandle, n, &cathandle->u.chd.chd_head, |
926d6fb2 | 128 | u.phd.phd_entry) { |
d7e09d03 PT |
129 | /* unlink open-not-created llogs */ |
130 | list_del_init(&loghandle->u.phd.phd_entry); | |
d7e09d03 PT |
131 | llog_close(env, loghandle); |
132 | } | |
133 | /* if handle was stored in ctxt, remove it too */ | |
134 | if (cathandle->lgh_ctxt->loc_handle == cathandle) | |
135 | cathandle->lgh_ctxt->loc_handle = NULL; | |
ac4455e0 | 136 | return llog_close(env, cathandle); |
d7e09d03 PT |
137 | } |
138 | EXPORT_SYMBOL(llog_cat_close); | |
139 | ||
89026cbc AA |
140 | static int llog_cat_process_cb(const struct lu_env *env, |
141 | struct llog_handle *cat_llh, | |
142 | struct llog_rec_hdr *rec, void *data) | |
d7e09d03 PT |
143 | { |
144 | struct llog_process_data *d = data; | |
145 | struct llog_logid_rec *lir = (struct llog_logid_rec *)rec; | |
146 | struct llog_handle *llh; | |
147 | int rc; | |
148 | ||
d7e09d03 PT |
149 | if (rec->lrh_type != LLOG_LOGID_MAGIC) { |
150 | CERROR("invalid record in catalog\n"); | |
0a3bdb00 | 151 | return -EINVAL; |
d7e09d03 PT |
152 | } |
153 | CDEBUG(D_HA, "processing log "DOSTID":%x at index %u of catalog " | |
154 | DOSTID"\n", POSTID(&lir->lid_id.lgl_oi), lir->lid_id.lgl_ogen, | |
155 | rec->lrh_index, POSTID(&cat_llh->lgh_id.lgl_oi)); | |
156 | ||
157 | rc = llog_cat_id2handle(env, cat_llh, &llh, &lir->lid_id); | |
158 | if (rc) { | |
159 | CERROR("%s: cannot find handle for llog "DOSTID": %d\n", | |
160 | cat_llh->lgh_ctxt->loc_obd->obd_name, | |
161 | POSTID(&lir->lid_id.lgl_oi), rc); | |
0a3bdb00 | 162 | return rc; |
d7e09d03 PT |
163 | } |
164 | ||
165 | if (rec->lrh_index < d->lpd_startcat) | |
166 | /* Skip processing of the logs until startcat */ | |
7345fb75 JH |
167 | rc = 0; |
168 | else if (d->lpd_startidx > 0) { | |
d7e09d03 PT |
169 | struct llog_process_cat_data cd; |
170 | ||
171 | cd.lpcd_first_idx = d->lpd_startidx; | |
172 | cd.lpcd_last_idx = 0; | |
173 | rc = llog_process_or_fork(env, llh, d->lpd_cb, d->lpd_data, | |
174 | &cd, false); | |
175 | /* Continue processing the next log from idx 0 */ | |
176 | d->lpd_startidx = 0; | |
177 | } else { | |
178 | rc = llog_process_or_fork(env, llh, d->lpd_cb, d->lpd_data, | |
179 | NULL, false); | |
180 | } | |
7345fb75 | 181 | |
d7e09d03 PT |
182 | llog_handle_put(llh); |
183 | ||
0a3bdb00 | 184 | return rc; |
d7e09d03 PT |
185 | } |
186 | ||
17ad0ce6 SB |
187 | static int llog_cat_process_or_fork(const struct lu_env *env, |
188 | struct llog_handle *cat_llh, | |
189 | llog_cb_t cb, void *data, int startcat, | |
190 | int startidx, bool fork) | |
d7e09d03 PT |
191 | { |
192 | struct llog_process_data d; | |
193 | struct llog_log_hdr *llh = cat_llh->lgh_hdr; | |
194 | int rc; | |
d7e09d03 PT |
195 | |
196 | LASSERT(llh->llh_flags & LLOG_F_IS_CAT); | |
197 | d.lpd_data = data; | |
198 | d.lpd_cb = cb; | |
199 | d.lpd_startcat = startcat; | |
200 | d.lpd_startidx = startidx; | |
201 | ||
202 | if (llh->llh_cat_idx > cat_llh->lgh_last_idx) { | |
203 | struct llog_process_cat_data cd; | |
204 | ||
205 | CWARN("catlog "DOSTID" crosses index zero\n", | |
206 | POSTID(&cat_llh->lgh_id.lgl_oi)); | |
207 | ||
208 | cd.lpcd_first_idx = llh->llh_cat_idx; | |
209 | cd.lpcd_last_idx = 0; | |
210 | rc = llog_process_or_fork(env, cat_llh, llog_cat_process_cb, | |
211 | &d, &cd, fork); | |
212 | if (rc != 0) | |
0a3bdb00 | 213 | return rc; |
d7e09d03 PT |
214 | |
215 | cd.lpcd_first_idx = 0; | |
216 | cd.lpcd_last_idx = cat_llh->lgh_last_idx; | |
217 | rc = llog_process_or_fork(env, cat_llh, llog_cat_process_cb, | |
218 | &d, &cd, fork); | |
219 | } else { | |
220 | rc = llog_process_or_fork(env, cat_llh, llog_cat_process_cb, | |
221 | &d, NULL, fork); | |
222 | } | |
223 | ||
0a3bdb00 | 224 | return rc; |
d7e09d03 | 225 | } |
d7e09d03 PT |
226 | |
227 | int llog_cat_process(const struct lu_env *env, struct llog_handle *cat_llh, | |
228 | llog_cb_t cb, void *data, int startcat, int startidx) | |
229 | { | |
230 | return llog_cat_process_or_fork(env, cat_llh, cb, data, startcat, | |
231 | startidx, false); | |
232 | } | |
233 | EXPORT_SYMBOL(llog_cat_process); |