Add the rt linux 4.1.3-rt3 as base
[kvmfornfv.git] / kernel / drivers / staging / lustre / lustre / obdclass / llog_swab.c
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
18  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
19  *
20  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21  * CA 95054 USA or visit www.sun.com if you need additional information or
22  * have any questions.
23  *
24  * GPL HEADER END
25  */
26 /*
27  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
28  * Use is subject to license terms.
29  *
30  * Copyright (c) 2012, Intel Corporation.
31  */
32 /*
33  * This file is part of Lustre, http://www.lustre.org/
34  * Lustre is a trademark of Sun Microsystems, Inc.
35  *
36  * lustre/obdclass/llog_swab.c
37  *
38  * Swabbing of llog datatypes (from disk or over the wire).
39  *
40  * Author: jacob berkman  <jacob@clusterfs.com>
41  */
42
43 #define DEBUG_SUBSYSTEM S_LOG
44
45
46 #include "../include/lustre_log.h"
47
48 static void print_llogd_body(struct llogd_body *d)
49 {
50         CDEBUG(D_OTHER, "llogd body: %p\n", d);
51         CDEBUG(D_OTHER, "\tlgd_logid.lgl_oi: "DOSTID"\n",
52                POSTID(&d->lgd_logid.lgl_oi));
53         CDEBUG(D_OTHER, "\tlgd_logid.lgl_ogen: %#x\n", d->lgd_logid.lgl_ogen);
54         CDEBUG(D_OTHER, "\tlgd_ctxt_idx: %#x\n", d->lgd_ctxt_idx);
55         CDEBUG(D_OTHER, "\tlgd_llh_flags: %#x\n", d->lgd_llh_flags);
56         CDEBUG(D_OTHER, "\tlgd_index: %#x\n", d->lgd_index);
57         CDEBUG(D_OTHER, "\tlgd_saved_index: %#x\n", d->lgd_saved_index);
58         CDEBUG(D_OTHER, "\tlgd_len: %#x\n", d->lgd_len);
59         CDEBUG(D_OTHER, "\tlgd_cur_offset: %#llx\n", d->lgd_cur_offset);
60 }
61
62 void lustre_swab_lu_fid(struct lu_fid *fid)
63 {
64         __swab64s(&fid->f_seq);
65         __swab32s(&fid->f_oid);
66         __swab32s(&fid->f_ver);
67 }
68 EXPORT_SYMBOL(lustre_swab_lu_fid);
69
70 void lustre_swab_ost_id(struct ost_id *oid)
71 {
72         if (fid_seq_is_mdt0(oid->oi.oi_seq)) {
73                 __swab64s(&oid->oi.oi_id);
74                 __swab64s(&oid->oi.oi_seq);
75         } else {
76                 lustre_swab_lu_fid(&oid->oi_fid);
77         }
78 }
79 EXPORT_SYMBOL(lustre_swab_ost_id);
80
81 void lustre_swab_llog_id(struct llog_logid *log_id)
82 {
83         __swab64s(&log_id->lgl_oi.oi.oi_id);
84         __swab64s(&log_id->lgl_oi.oi.oi_seq);
85         __swab32s(&log_id->lgl_ogen);
86 }
87 EXPORT_SYMBOL(lustre_swab_llog_id);
88
89 void lustre_swab_llogd_body(struct llogd_body *d)
90 {
91         print_llogd_body(d);
92         lustre_swab_llog_id(&d->lgd_logid);
93         __swab32s(&d->lgd_ctxt_idx);
94         __swab32s(&d->lgd_llh_flags);
95         __swab32s(&d->lgd_index);
96         __swab32s(&d->lgd_saved_index);
97         __swab32s(&d->lgd_len);
98         __swab64s(&d->lgd_cur_offset);
99         print_llogd_body(d);
100 }
101 EXPORT_SYMBOL(lustre_swab_llogd_body);
102
103 void lustre_swab_llogd_conn_body(struct llogd_conn_body *d)
104 {
105         __swab64s(&d->lgdc_gen.mnt_cnt);
106         __swab64s(&d->lgdc_gen.conn_cnt);
107         lustre_swab_llog_id(&d->lgdc_logid);
108         __swab32s(&d->lgdc_ctxt_idx);
109 }
110 EXPORT_SYMBOL(lustre_swab_llogd_conn_body);
111
112 void lustre_swab_ll_fid(struct ll_fid *fid)
113 {
114         __swab64s(&fid->id);
115         __swab32s(&fid->generation);
116         __swab32s(&fid->f_type);
117 }
118 EXPORT_SYMBOL(lustre_swab_ll_fid);
119
120 void lustre_swab_lu_seq_range(struct lu_seq_range *range)
121 {
122         __swab64s(&range->lsr_start);
123         __swab64s(&range->lsr_end);
124         __swab32s(&range->lsr_index);
125         __swab32s(&range->lsr_flags);
126 }
127 EXPORT_SYMBOL(lustre_swab_lu_seq_range);
128
129 void lustre_swab_llog_rec(struct llog_rec_hdr *rec)
130 {
131         struct llog_rec_tail *tail = NULL;
132
133         __swab32s(&rec->lrh_len);
134         __swab32s(&rec->lrh_index);
135         __swab32s(&rec->lrh_type);
136         __swab32s(&rec->lrh_id);
137
138         switch (rec->lrh_type) {
139         case OST_SZ_REC:
140         {
141                 struct llog_size_change_rec *lsc =
142                         (struct llog_size_change_rec *)rec;
143
144                 lustre_swab_ll_fid(&lsc->lsc_fid);
145                 __swab32s(&lsc->lsc_ioepoch);
146                 tail = &lsc->lsc_tail;
147                 break;
148         }
149         case MDS_UNLINK_REC:
150         {
151                 struct llog_unlink_rec *lur = (struct llog_unlink_rec *)rec;
152
153                 __swab64s(&lur->lur_oid);
154                 __swab32s(&lur->lur_oseq);
155                 __swab32s(&lur->lur_count);
156                 tail = &lur->lur_tail;
157                 break;
158         }
159         case MDS_UNLINK64_REC:
160         {
161                 struct llog_unlink64_rec *lur =
162                         (struct llog_unlink64_rec *)rec;
163
164                 lustre_swab_lu_fid(&lur->lur_fid);
165                 __swab32s(&lur->lur_count);
166                 tail = &lur->lur_tail;
167                 break;
168         }
169         case CHANGELOG_REC:
170         {
171                 struct llog_changelog_rec *cr =
172                         (struct llog_changelog_rec *)rec;
173
174                 __swab16s(&cr->cr.cr_namelen);
175                 __swab16s(&cr->cr.cr_flags);
176                 __swab32s(&cr->cr.cr_type);
177                 __swab64s(&cr->cr.cr_index);
178                 __swab64s(&cr->cr.cr_prev);
179                 __swab64s(&cr->cr.cr_time);
180                 lustre_swab_lu_fid(&cr->cr.cr_tfid);
181                 lustre_swab_lu_fid(&cr->cr.cr_pfid);
182                 if (CHANGELOG_REC_EXTENDED(&cr->cr)) {
183                         struct llog_changelog_ext_rec *ext =
184                                 (struct llog_changelog_ext_rec *)rec;
185
186                         lustre_swab_lu_fid(&ext->cr.cr_sfid);
187                         lustre_swab_lu_fid(&ext->cr.cr_spfid);
188                         tail = &ext->cr_tail;
189                 } else {
190                         tail = &cr->cr_tail;
191                 }
192                 tail = (struct llog_rec_tail *)((char *)tail +
193                                                 cr->cr.cr_namelen);
194                 break;
195         }
196         case CHANGELOG_USER_REC:
197         {
198                 struct llog_changelog_user_rec *cur =
199                         (struct llog_changelog_user_rec *)rec;
200
201                 __swab32s(&cur->cur_id);
202                 __swab64s(&cur->cur_endrec);
203                 tail = &cur->cur_tail;
204                 break;
205         }
206
207         case HSM_AGENT_REC: {
208                 struct llog_agent_req_rec *arr =
209                         (struct llog_agent_req_rec *)rec;
210
211                 __swab32s(&arr->arr_hai.hai_len);
212                 __swab32s(&arr->arr_hai.hai_action);
213                 lustre_swab_lu_fid(&arr->arr_hai.hai_fid);
214                 lustre_swab_lu_fid(&arr->arr_hai.hai_dfid);
215                 __swab64s(&arr->arr_hai.hai_cookie);
216                 __swab64s(&arr->arr_hai.hai_extent.offset);
217                 __swab64s(&arr->arr_hai.hai_extent.length);
218                 __swab64s(&arr->arr_hai.hai_gid);
219                 /* no swabing for opaque data */
220                 /* hai_data[0]; */
221                 break;
222         }
223
224         case MDS_SETATTR64_REC:
225         {
226                 struct llog_setattr64_rec *lsr =
227                         (struct llog_setattr64_rec *)rec;
228
229                 lustre_swab_ost_id(&lsr->lsr_oi);
230                 __swab32s(&lsr->lsr_uid);
231                 __swab32s(&lsr->lsr_uid_h);
232                 __swab32s(&lsr->lsr_gid);
233                 __swab32s(&lsr->lsr_gid_h);
234                 tail = &lsr->lsr_tail;
235                 break;
236         }
237         case OBD_CFG_REC:
238                 /* these are swabbed as they are consumed */
239                 break;
240         case LLOG_HDR_MAGIC:
241         {
242                 struct llog_log_hdr *llh = (struct llog_log_hdr *)rec;
243
244                 __swab64s(&llh->llh_timestamp);
245                 __swab32s(&llh->llh_count);
246                 __swab32s(&llh->llh_bitmap_offset);
247                 __swab32s(&llh->llh_flags);
248                 __swab32s(&llh->llh_size);
249                 __swab32s(&llh->llh_cat_idx);
250                 tail = &llh->llh_tail;
251                 break;
252         }
253         case LLOG_LOGID_MAGIC:
254         {
255                 struct llog_logid_rec *lid = (struct llog_logid_rec *)rec;
256
257                 lustre_swab_llog_id(&lid->lid_id);
258                 tail = &lid->lid_tail;
259                 break;
260         }
261         case LLOG_GEN_REC:
262         {
263                 struct llog_gen_rec *lgr = (struct llog_gen_rec *)rec;
264
265                 __swab64s(&lgr->lgr_gen.mnt_cnt);
266                 __swab64s(&lgr->lgr_gen.conn_cnt);
267                 tail = &lgr->lgr_tail;
268                 break;
269         }
270         case LLOG_PAD_MAGIC:
271                 break;
272         default:
273                 CERROR("Unknown llog rec type %#x swabbing rec %p\n",
274                        rec->lrh_type, rec);
275         }
276
277         if (tail) {
278                 __swab32s(&tail->lrt_len);
279                 __swab32s(&tail->lrt_index);
280         }
281 }
282 EXPORT_SYMBOL(lustre_swab_llog_rec);
283
284 static void print_llog_hdr(struct llog_log_hdr *h)
285 {
286         CDEBUG(D_OTHER, "llog header: %p\n", h);
287         CDEBUG(D_OTHER, "\tllh_hdr.lrh_index: %#x\n", h->llh_hdr.lrh_index);
288         CDEBUG(D_OTHER, "\tllh_hdr.lrh_len: %#x\n", h->llh_hdr.lrh_len);
289         CDEBUG(D_OTHER, "\tllh_hdr.lrh_type: %#x\n", h->llh_hdr.lrh_type);
290         CDEBUG(D_OTHER, "\tllh_timestamp: %#llx\n", h->llh_timestamp);
291         CDEBUG(D_OTHER, "\tllh_count: %#x\n", h->llh_count);
292         CDEBUG(D_OTHER, "\tllh_bitmap_offset: %#x\n", h->llh_bitmap_offset);
293         CDEBUG(D_OTHER, "\tllh_flags: %#x\n", h->llh_flags);
294         CDEBUG(D_OTHER, "\tllh_size: %#x\n", h->llh_size);
295         CDEBUG(D_OTHER, "\tllh_cat_idx: %#x\n", h->llh_cat_idx);
296         CDEBUG(D_OTHER, "\tllh_tail.lrt_index: %#x\n", h->llh_tail.lrt_index);
297         CDEBUG(D_OTHER, "\tllh_tail.lrt_len: %#x\n", h->llh_tail.lrt_len);
298 }
299
300 void lustre_swab_llog_hdr(struct llog_log_hdr *h)
301 {
302         print_llog_hdr(h);
303
304         lustre_swab_llog_rec(&h->llh_hdr);
305
306         print_llog_hdr(h);
307 }
308 EXPORT_SYMBOL(lustre_swab_llog_hdr);
309
310 static void print_lustre_cfg(struct lustre_cfg *lcfg)
311 {
312         int i;
313
314         if (!(libcfs_debug & D_OTHER)) /* don't loop on nothing */
315                 return;
316         CDEBUG(D_OTHER, "lustre_cfg: %p\n", lcfg);
317         CDEBUG(D_OTHER, "\tlcfg->lcfg_version: %#x\n", lcfg->lcfg_version);
318
319         CDEBUG(D_OTHER, "\tlcfg->lcfg_command: %#x\n", lcfg->lcfg_command);
320         CDEBUG(D_OTHER, "\tlcfg->lcfg_num: %#x\n", lcfg->lcfg_num);
321         CDEBUG(D_OTHER, "\tlcfg->lcfg_flags: %#x\n", lcfg->lcfg_flags);
322         CDEBUG(D_OTHER, "\tlcfg->lcfg_nid: %s\n", libcfs_nid2str(lcfg->lcfg_nid));
323
324         CDEBUG(D_OTHER, "\tlcfg->lcfg_bufcount: %d\n", lcfg->lcfg_bufcount);
325         if (lcfg->lcfg_bufcount < LUSTRE_CFG_MAX_BUFCOUNT)
326                 for (i = 0; i < lcfg->lcfg_bufcount; i++)
327                         CDEBUG(D_OTHER, "\tlcfg->lcfg_buflens[%d]: %d\n",
328                                i, lcfg->lcfg_buflens[i]);
329 }
330
331 void lustre_swab_lustre_cfg(struct lustre_cfg *lcfg)
332 {
333         int i;
334
335         __swab32s(&lcfg->lcfg_version);
336
337         if (lcfg->lcfg_version != LUSTRE_CFG_VERSION) {
338                 CERROR("not swabbing lustre_cfg version %#x (expecting %#x)\n",
339                        lcfg->lcfg_version, LUSTRE_CFG_VERSION);
340                 return;
341         }
342
343         __swab32s(&lcfg->lcfg_command);
344         __swab32s(&lcfg->lcfg_num);
345         __swab32s(&lcfg->lcfg_flags);
346         __swab64s(&lcfg->lcfg_nid);
347         __swab32s(&lcfg->lcfg_bufcount);
348         for (i = 0; i < lcfg->lcfg_bufcount && i < LUSTRE_CFG_MAX_BUFCOUNT; i++)
349                 __swab32s(&lcfg->lcfg_buflens[i]);
350
351         print_lustre_cfg(lcfg);
352         return;
353 }
354 EXPORT_SYMBOL(lustre_swab_lustre_cfg);
355
356 /* used only for compatibility with old on-disk cfg_marker data */
357 struct cfg_marker32 {
358         __u32   cm_step;
359         __u32   cm_flags;
360         __u32   cm_vers;
361         __u32   padding;
362         __u32   cm_createtime;
363         __u32   cm_canceltime;
364         char    cm_tgtname[MTI_NAME_MAXLEN];
365         char    cm_comment[MTI_NAME_MAXLEN];
366 };
367
368 #define MTI_NAMELEN32    (MTI_NAME_MAXLEN - \
369         (sizeof(struct cfg_marker) - sizeof(struct cfg_marker32)))
370
371 void lustre_swab_cfg_marker(struct cfg_marker *marker, int swab, int size)
372 {
373         struct cfg_marker32 *cm32 = (struct cfg_marker32 *)marker;
374
375         if (swab) {
376                 __swab32s(&marker->cm_step);
377                 __swab32s(&marker->cm_flags);
378                 __swab32s(&marker->cm_vers);
379         }
380         if (size == sizeof(*cm32)) {
381                 __u32 createtime, canceltime;
382                 /* There was a problem with the original declaration of
383                  * cfg_marker on 32-bit systems because it used time_t as
384                  * a wire protocol structure, and didn't verify this in
385                  * wirecheck.  We now have to convert the offsets of the
386                  * later fields in order to work on 32- and 64-bit systems.
387                  *
388                  * Fortunately, the cm_comment field has no functional use
389                  * so can be sacrificed when converting the timestamp size.
390                  *
391                  * Overwrite fields from the end first, so they are not
392                  * clobbered, and use memmove() instead of memcpy() because
393                  * the source and target buffers overlap.  bug 16771 */
394                 createtime = cm32->cm_createtime;
395                 canceltime = cm32->cm_canceltime;
396                 memmove(marker->cm_comment, cm32->cm_comment, MTI_NAMELEN32);
397                 marker->cm_comment[MTI_NAMELEN32 - 1] = '\0';
398                 memmove(marker->cm_tgtname, cm32->cm_tgtname,
399                         sizeof(marker->cm_tgtname));
400                 if (swab) {
401                         __swab32s(&createtime);
402                         __swab32s(&canceltime);
403                 }
404                 marker->cm_createtime = createtime;
405                 marker->cm_canceltime = canceltime;
406                 CDEBUG(D_CONFIG, "Find old cfg_marker(Srv32b,Clt64b) for target %s, converting\n",
407                        marker->cm_tgtname);
408         } else if (swab) {
409                 __swab64s(&marker->cm_createtime);
410                 __swab64s(&marker->cm_canceltime);
411         }
412
413         return;
414 }
415 EXPORT_SYMBOL(lustre_swab_cfg_marker);