lustre/obdclass/llog_ioctl.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * GPL HEADER START
   5  *
   6  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 only,
  10  * as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License version 2 for more details (a copy is included
  16  * in the LICENSE file that accompanied this code).
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * version 2 along with this program; If not, see
  20  * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
  21  *
  22  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  23  * CA 95054 USA or visit www.sun.com if you need additional information or
  24  * have any questions.
  25  *
  26  * GPL HEADER END
  27  */
  28 /*
  29  * Copyright  2008 Sun Microsystems, Inc. All rights reserved
  30  * Use is subject to license terms.
  31  */
  32 /*
  33  * This file is part of Lustre, http://www.lustre.org/
  34  * Lustre is a trademark of Sun Microsystems, Inc.
  35  */
  36
  37 #define DEBUG_SUBSYSTEM S_LOG
  38
  39 #ifndef EXPORT_SYMTAB
  40 #define EXPORT_SYMTAB
  41 #endif
  42
  43 #include <obd_class.h>
  44 #include <lustre_log.h>
  45 #include <libcfs/list.h>
  46 #include "llog_internal.h"
  47
  48 static int str2logid(struct llog_logid *logid, char *str, int len)
  49 {
  50         char *start, *end, *endp;
  51
  52         ENTRY;
  53         start = str;
  54         if (*start != '#')
  55                 RETURN(-EINVAL);
  56
  57         start++;
  58         if (start - str >= len - 1)
  59                 RETURN(-EINVAL);
  60         end = strchr(start, '#');
  61         if (end == NULL || end == start)
  62                 RETURN(-EINVAL);
  63
  64         *end = '\0';
  65         logid->lgl_oid = simple_strtoull(start, &endp, 0);
  66         if (endp != end)
  67                 RETURN(-EINVAL);
  68
  69         start = ++end;
  70         if (start - str >= len - 1)
  71                 RETURN(-EINVAL);
  72         end = strchr(start, '#');
  73         if (end == NULL || end == start)
  74                 RETURN(-EINVAL);
  75
  76         *end = '\0';
  77         logid->lgl_ogr = simple_strtoull(start, &endp, 0);
  78         if (endp != end)
  79                 RETURN(-EINVAL);
  80
  81         start = ++end;
  82         if (start - str >= len - 1)
  83                 RETURN(-EINVAL);
  84         logid->lgl_ogen = simple_strtoul(start, &endp, 16);
  85         if (*endp != '\0')
  86                 RETURN(-EINVAL);
  87
  88         RETURN(0);
  89 }
  90
  91 static int llog_check_cb(struct llog_handle *handle, struct llog_rec_hdr *rec,
  92                          void *data)
  93 {
  94         struct obd_ioctl_data *ioc_data = (struct obd_ioctl_data *)data;
  95         static int l, remains, from, to;
  96         static char *out;
  97         char *endp;
  98         int cur_index, rc = 0;
  99
 100         ENTRY;
 101         cur_index = rec->lrh_index;
 102
 103         if (ioc_data && (ioc_data->ioc_inllen1)) {
 104                 l = 0;
 105                 remains = ioc_data->ioc_inllen4 +
 106                         size_round(ioc_data->ioc_inllen1) +
 107                         size_round(ioc_data->ioc_inllen2) +
 108                         size_round(ioc_data->ioc_inllen3);
 109                 from = simple_strtol(ioc_data->ioc_inlbuf2, &endp, 0);
 110                 if (*endp != '\0')
 111                         RETURN(-EINVAL);
 112                 to = simple_strtol(ioc_data->ioc_inlbuf3, &endp, 0);
 113                 if (*endp != '\0')
 114                         RETURN(-EINVAL);
 115                 ioc_data->ioc_inllen1 = 0;
 116                 out = ioc_data->ioc_bulk;
 117                 if (cur_index < from)
 118                         RETURN(0);
 119                 if (to > 0 && cur_index > to)
 120                         RETURN(-LLOG_EEMPTY);
 121         }
 122         if (handle->lgh_hdr->llh_flags & LLOG_F_IS_CAT) {
 123                 struct llog_logid_rec *lir = (struct llog_logid_rec *)rec;
 124                 struct llog_handle *log_handle;
 125
 126                 if (rec->lrh_type != LLOG_LOGID_MAGIC) {
 127                         l = snprintf(out, remains, "[index]: %05d  [type]: "
 128                                      "%02x  [len]: %04d failed\n",
 129                                      cur_index, rec->lrh_type,
 130                                      rec->lrh_len);
 131                 }
 132                 if (handle->lgh_ctxt == NULL)
 133                         RETURN(-EOPNOTSUPP);
 134                 rc = llog_cat_id2handle(handle, &log_handle, &lir->lid_id);
 135                 if (rc) {
 136                         CDEBUG(D_IOCTL,
 137                                "cannot find log #"LPX64"#"LPX64"#%08x\n",
 138                                lir->lid_id.lgl_oid, lir->lid_id.lgl_ogr,
 139                                lir->lid_id.lgl_ogen);
 140                         RETURN(rc);
 141                 }
 142                 rc = llog_process(log_handle, llog_check_cb, NULL, NULL);
 143                 llog_close(log_handle);
 144         } else {
 145                 switch (rec->lrh_type) {
 146                 case OST_SZ_REC:
 147                 case OST_RAID1_REC:
 148                 case MDS_UNLINK_REC:
 149                 case MDS_SETATTR_REC:
 150                 case OBD_CFG_REC:
 151                 case LLOG_HDR_MAGIC: {
 152                          l = snprintf(out, remains, "[index]: %05d  [type]: "
 153                                       "%02x  [len]: %04d ok\n",
 154                                       cur_index, rec->lrh_type,
 155                                       rec->lrh_len);
 156                          out += l;
 157                          remains -= l;
 158                          if (remains <= 0) {
 159                                 CERROR("no space to print log records\n");
 160                                 RETURN(-LLOG_EEMPTY);
 161                          }
 162                          RETURN(0);
 163                 }
 164                 default: {
 165                          l = snprintf(out, remains, "[index]: %05d  [type]: "
 166                                       "%02x  [len]: %04d failed\n",
 167                                       cur_index, rec->lrh_type,
 168                                       rec->lrh_len);
 169                          out += l;
 170                          remains -= l;
 171                          if (remains <= 0) {
 172                                 CERROR("no space to print log records\n");
 173                                 RETURN(-LLOG_EEMPTY);
 174                          }
 175                          RETURN(0);
 176                 }
 177                 }
 178         }
 179         RETURN(rc);
 180 }
 181
 182 static int llog_print_cb(struct llog_handle *handle, struct llog_rec_hdr *rec,
 183                          void *data)
 184 {
 185         struct obd_ioctl_data *ioc_data = (struct obd_ioctl_data *)data;
 186         static int l, remains, from, to;
 187         static char *out;
 188         char *endp;
 189         int cur_index;
 190
 191         ENTRY;
 192         if (ioc_data->ioc_inllen1) {
 193                 l = 0;
 194                 remains = ioc_data->ioc_inllen4 +
 195                         size_round(ioc_data->ioc_inllen1) +
 196                         size_round(ioc_data->ioc_inllen2) +
 197                         size_round(ioc_data->ioc_inllen3);
 198                 from = simple_strtol(ioc_data->ioc_inlbuf2, &endp, 0);
 199                 if (*endp != '\0')
 200                         RETURN(-EINVAL);
 201                 to = simple_strtol(ioc_data->ioc_inlbuf3, &endp, 0);
 202                 if (*endp != '\0')
 203                         RETURN(-EINVAL);
 204                 out = ioc_data->ioc_bulk;
 205                 ioc_data->ioc_inllen1 = 0;
 206         }
 207
 208         cur_index = rec->lrh_index;
 209         if (cur_index < from)
 210                 RETURN(0);
 211         if (to > 0 && cur_index > to)
 212                 RETURN(-LLOG_EEMPTY);
 213
 214         if (handle->lgh_hdr->llh_flags & LLOG_F_IS_CAT) {
 215                 struct llog_logid_rec *lir = (struct llog_logid_rec *)rec;
 216                 if (rec->lrh_type != LLOG_LOGID_MAGIC) {
 217                         CERROR("invalid record in catalog\n");
 218                         RETURN(-EINVAL);
 219                 }
 220
 221                 l = snprintf(out, remains,
 222                              "[index]: %05d  [logid]: #"LPX64"#"LPX64"#%08x\n",
 223                              cur_index, lir->lid_id.lgl_oid,
 224                              lir->lid_id.lgl_ogr, lir->lid_id.lgl_ogen);
 225         } else {
 226                 l = snprintf(out, remains,
 227                              "[index]: %05d  [type]: %02x  [len]: %04d\n",
 228                              cur_index, rec->lrh_type,
 229                              rec->lrh_len);
 230         }
 231         out += l;
 232         remains -= l;
 233         if (remains <= 0) {
 234                 CERROR("not enough space for print log records\n");
 235                 RETURN(-LLOG_EEMPTY);
 236         }
 237
 238         RETURN(0);
 239 }
 240 static int llog_remove_log(struct llog_handle *cat, struct llog_logid *logid)
 241 {
 242         struct llog_handle *log;
 243         int rc, index = 0;
 244
 245         ENTRY;
 246         down_write(&cat->lgh_lock);
 247         rc = llog_cat_id2handle(cat, &log, logid);
 248         if (rc) {
 249                 CDEBUG(D_IOCTL, "cannot find log #"LPX64"#"LPX64"#%08x\n",
 250                        logid->lgl_oid, logid->lgl_ogr, logid->lgl_ogen);
 251                 GOTO(out, rc = -ENOENT);
 252         }
 253
 254         index = log->u.phd.phd_cookie.lgc_index;
 255         LASSERT(index);
 256         rc = llog_destroy(log);
 257         if (rc) {
 258                 CDEBUG(D_IOCTL, "cannot destroy log\n");
 259                 GOTO(out, rc);
 260         }
 261         llog_cat_set_first_idx(cat, index);
 262         rc = llog_cancel_rec(cat, index);
 263 out:
 264         llog_free_handle(log);
 265         up_write(&cat->lgh_lock);
 266         RETURN(rc);
 267
 268 }
 269
 270 static int llog_delete_cb(struct llog_handle *handle, struct llog_rec_hdr *rec,
 271                           void *data)
 272 {
 273         struct  llog_logid_rec *lir = (struct llog_logid_rec*)rec;
 274         int     rc;
 275
 276         ENTRY;
 277         if (rec->lrh_type != LLOG_LOGID_MAGIC)
 278               RETURN (-EINVAL);
 279         rc = llog_remove_log(handle, &lir->lid_id);
 280
 281         RETURN(rc);
 282 }
 283
 284
 285 int llog_ioctl(struct llog_ctxt *ctxt, int cmd, struct obd_ioctl_data *data)
 286 {
 287         struct llog_logid logid;
 288         int err = 0;
 289         struct llog_handle *handle = NULL;
 290
 291         ENTRY;
 292         if (*data->ioc_inlbuf1 == '#') {
 293                 err = str2logid(&logid, data->ioc_inlbuf1, data->ioc_inllen1);
 294                 if (err)
 295                         GOTO(out, err);
 296                 err = llog_create(ctxt, &handle, &logid, NULL);
 297                 if (err)
 298                         GOTO(out, err);
 299         } else if (*data->ioc_inlbuf1 == '$') {
 300                 char *name = data->ioc_inlbuf1 + 1;
 301                 err = llog_create(ctxt, &handle, NULL, name);
 302                 if (err)
 303                         GOTO(out, err);
 304         } else {
 305                 GOTO(out, err = -EINVAL);
 306         }
 307
 308         err = llog_init_handle(handle, 0, NULL);
 309         if (err)
 310                 GOTO(out_close, err = -ENOENT);
 311
 312         switch (cmd) {
 313         case OBD_IOC_LLOG_INFO: {
 314                 int l;
 315                 int remains = data->ioc_inllen2 +
 316                         size_round(data->ioc_inllen1);
 317                 char *out = data->ioc_bulk;
 318
 319                 l = snprintf(out, remains,
 320                              "logid:            #"LPX64"#"LPX64"#%08x\n"
 321                              "flags:            %x (%s)\n"
 322                              "records count:    %d\n"
 323                              "last index:       %d\n",
 324                              handle->lgh_id.lgl_oid, handle->lgh_id.lgl_ogr,
 325                              handle->lgh_id.lgl_ogen,
 326                              handle->lgh_hdr->llh_flags,
 327                              handle->lgh_hdr->llh_flags &
 328                              LLOG_F_IS_CAT ? "cat" : "plain",
 329                              handle->lgh_hdr->llh_count,
 330                              handle->lgh_last_idx);
 331                 out += l;
 332                 remains -= l;
 333                 if (remains <= 0)
 334                         CERROR("not enough space for log header info\n");
 335
 336                 GOTO(out_close, err);
 337         }
 338         case OBD_IOC_LLOG_CHECK: {
 339                 LASSERT(data->ioc_inllen1);
 340                 err = llog_process(handle, llog_check_cb, data, NULL);
 341                 if (err == -LLOG_EEMPTY)
 342                         err = 0;
 343                 GOTO(out_close, err);
 344         }
 345
 346         case OBD_IOC_LLOG_PRINT: {
 347                 LASSERT(data->ioc_inllen1);
 348                 err = llog_process(handle, class_config_dump_handler,data,NULL);
 349                 if (err == -LLOG_EEMPTY)
 350                         err = 0;
 351                 else
 352                         err = llog_process(handle, llog_print_cb, data, NULL);
 353
 354                 GOTO(out_close, err);
 355         }
 356         case OBD_IOC_LLOG_CANCEL: {
 357                 struct llog_cookie cookie;
 358                 struct llog_logid plain;
 359                 char *endp;
 360
 361                 cookie.lgc_index = simple_strtoul(data->ioc_inlbuf3, &endp, 0);
 362                 if (*endp != '\0')
 363                         GOTO(out_close, err = -EINVAL);
 364
 365                 if (handle->lgh_hdr->llh_flags & LLOG_F_IS_CAT) {
 366                         down_write(&handle->lgh_lock);
 367                         err = llog_cancel_rec(handle, cookie.lgc_index);
 368                         up_write(&handle->lgh_lock);
 369                         GOTO(out_close, err);
 370                 }
 371
 372                 err = str2logid(&plain, data->ioc_inlbuf2, data->ioc_inllen2);
 373                 if (err)
 374                         GOTO(out_close, err);
 375                 cookie.lgc_lgl = plain;
 376
 377                 if (!(handle->lgh_hdr->llh_flags & LLOG_F_IS_CAT))
 378                         GOTO(out_close, err = -EINVAL);
 379
 380                 err = llog_cat_cancel_records(handle, 1, &cookie);
 381                 GOTO(out_close, err);
 382         }
 383         case OBD_IOC_LLOG_REMOVE: {
 384                 struct llog_logid plain;
 385
 386                 if (handle->lgh_hdr->llh_flags & LLOG_F_IS_PLAIN) {
 387                         err = llog_destroy(handle);
 388                         if (!err)
 389                                 llog_free_handle(handle);
 390                         GOTO(out, err);
 391                 }
 392
 393                 if (!(handle->lgh_hdr->llh_flags & LLOG_F_IS_CAT))
 394                         GOTO(out_close, err = -EINVAL);
 395
 396                 if (data->ioc_inlbuf2) {
 397                         /*remove indicate log from the catalog*/
 398                         err = str2logid(&plain, data->ioc_inlbuf2,
 399                                         data->ioc_inllen2);
 400                         if (err)
 401                                 GOTO(out_close, err);
 402                         err = llog_remove_log(handle, &plain);
 403                 } else {
 404                         /*remove all the log of the catalog*/
 405                         llog_process(handle, llog_delete_cb, NULL, NULL);
 406                 }
 407                 GOTO(out_close, err);
 408         }
 409         }
 410
 411 out_close:
 412         if (handle->lgh_hdr &&
 413             handle->lgh_hdr->llh_flags & LLOG_F_IS_CAT)
 414                 llog_cat_put(handle);
 415         else
 416                 llog_close(handle);
 417 out:
 418         RETURN(err);
 419 }
 420 EXPORT_SYMBOL(llog_ioctl);
 421
 422 int llog_catalog_list(struct obd_device *obd, int count,
 423                       struct obd_ioctl_data *data)
 424 {
 425         int size, i;
 426         struct llog_catid *idarray;
 427         struct llog_logid *id;
 428         char name[32] = CATLIST;
 429         char *out;
 430         int l, remains, rc = 0;
 431
 432         ENTRY;
 433         size = sizeof(*idarray) * count;
 434
 435         OBD_VMALLOC(idarray, size);
 436         if (!idarray)
 437                 RETURN(-ENOMEM);
 438
 439         rc = llog_get_cat_list(obd, obd, name, 0, count, idarray);
 440         if (rc) {
 441                 OBD_FREE(idarray, size);
 442                 RETURN(rc);
 443         }
 444
 445         out = data->ioc_bulk;
 446         remains = data->ioc_inllen1;
 447         for (i = 0; i < count; i++) {
 448                 id = &idarray[i].lci_logid;
 449                 l = snprintf(out, remains,
 450                              "catalog log: #"LPX64"#"LPX64"#%08x\n",
 451                              id->lgl_oid, id->lgl_ogr, id->lgl_ogen);
 452                 out += l;
 453                 remains -= l;
 454                 if (remains <= 0) {
 455                         CWARN("not enough memory for catlog list\n");
 456                         break;
 457                 }
 458         }
 459         OBD_VFREE(idarray, size);
 460         RETURN(0);
 461
 462 }
 463 EXPORT_SYMBOL(llog_catalog_list);