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  *   You should have received a copy of the GNU General Public License
   5  *   along with Lustre; if not, write to the Free Software
   6  *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
   7  */
   8
   9 #define DEBUG_SUBSYSTEM S_LOG
  10
  11 #ifndef EXPORT_SYMTAB
  12 #define EXPORT_SYMTAB
  13 #endif
  14
  15 #include <linux/fs.h>
  16 #include <linux/obd_class.h>
  17 #include <linux/lustre_log.h>
  18 #include <portals/list.h>
  19 #include "llog_internal.h"
  20
  21 static int str2logid(struct llog_logid *logid, char *str, int len)
  22 {
  23         char *start, *end, *endp;
  24
  25         start = str;
  26         if (*start != '#')
  27                 RETURN(-EINVAL);
  28
  29         start++;
  30         if (start - str >= len - 1)
  31                 RETURN(-EINVAL);
  32         end = strchr(start, '#');
  33         if (end == NULL || end == start)
  34                 RETURN(-EINVAL);
  35
  36         *end = '\0';
  37         logid->lgl_oid = simple_strtoull(start, &endp, 0);
  38         if (endp != end)
  39                 RETURN(-EINVAL);
  40
  41         start = ++end;
  42         if (start - str >= len - 1)
  43                 RETURN(-EINVAL);
  44         end = strchr(start, '#');
  45         if (end == NULL || end == start)
  46                 RETURN(-EINVAL);
  47
  48         *end = '\0';
  49         logid->lgl_ogr = simple_strtoull(start, &endp, 0);
  50         if (endp != end)
  51                 RETURN(-EINVAL);
  52
  53         start = ++end;
  54         if (start - str >= len - 1)
  55                 RETURN(-EINVAL);
  56         logid->lgl_ogen = simple_strtoul(start, &endp, 16);
  57         if (*endp != '\0')
  58                 RETURN(-EINVAL);
  59
  60         RETURN(0);
  61 }
  62
  63 static int llog_check_cb(struct llog_handle *handle, struct llog_rec_hdr *rec,
  64                          void *data)
  65 {
  66         struct obd_ioctl_data *ioc_data = (struct obd_ioctl_data *)data;
  67         static int l, remains, from, to;
  68         static char *out;
  69         char *endp;
  70         int cur_index, rc = 0;
  71
  72         cur_index = rec->lrh_index;
  73
  74         if (ioc_data && (ioc_data->ioc_inllen1)) {
  75                 l = 0;
  76                 remains = ioc_data->ioc_inllen4 +
  77                         size_round(ioc_data->ioc_inllen1) +
  78                         size_round(ioc_data->ioc_inllen2) +
  79                         size_round(ioc_data->ioc_inllen3);
  80                 from = simple_strtol(ioc_data->ioc_inlbuf2, &endp, 0);
  81                 if (*endp != '\0')
  82                         RETURN(-EINVAL);
  83                 to = simple_strtol(ioc_data->ioc_inlbuf3, &endp, 0);
  84                 if (*endp != '\0')
  85                         RETURN(-EINVAL);
  86                 ioc_data->ioc_inllen1 = 0;
  87                 out = ioc_data->ioc_bulk;
  88                 if (cur_index < from)
  89                         RETURN(0);
  90                 if (to > 0 && cur_index > to)
  91                         RETURN(-LLOG_EEMPTY);
  92         }
  93         if (handle->lgh_hdr->llh_flags & LLOG_F_IS_CAT) {
  94                 struct llog_logid_rec *lir = (struct llog_logid_rec *)rec;
  95                 struct llog_handle *log_handle;
  96
  97                 if (rec->lrh_type != LLOG_LOGID_MAGIC) {
  98                         l = snprintf(out, remains, "[index]: %05d  [type]: "
  99                                      "%02x  [len]: %04d failed\n",
 100                                      cur_index, rec->lrh_type,
 101                                      rec->lrh_len);
 102                 }
 103                 if (handle->lgh_ctxt == NULL)
 104                         RETURN(-EOPNOTSUPP);
 105                 llog_cat_id2handle(handle, &log_handle, &lir->lid_id);
 106                 rc = llog_process(log_handle, llog_check_cb, NULL, NULL);
 107                 llog_close(log_handle);
 108         } else {
 109                 switch (rec->lrh_type) {
 110                 case OST_SZ_REC:
 111                 case OST_RAID1_REC:
 112                 case MDS_UNLINK_REC:
 113                 case OBD_CFG_REC:
 114                 case PTL_CFG_REC:
 115                 case LLOG_HDR_MAGIC: {
 116                          l = snprintf(out, remains, "[index]: %05d  [type]: "
 117                                       "%02x  [len]: %04d ok\n",
 118                                       cur_index, rec->lrh_type,
 119                                       rec->lrh_len);
 120                          out += l;
 121                          remains -= l;
 122                          if (remains <= 0) {
 123                                 CERROR("no space to print log records\n");
 124                                 RETURN(-LLOG_EEMPTY);
 125                          }
 126                          RETURN(0);
 127                 }
 128                 default: {
 129                          l = snprintf(out, remains, "[index]: %05d  [type]: "
 130                                       "%02x  [len]: %04d failed\n",
 131                                       cur_index, rec->lrh_type,
 132                                       rec->lrh_len);
 133                          out += l;
 134                          remains -= l;
 135                          if (remains <= 0) {
 136                                 CERROR("no space to print log records\n");
 137                                 RETURN(-LLOG_EEMPTY);
 138                          }
 139                          RETURN(0);
 140                 }
 141                 }
 142         }
 143         RETURN(rc);
 144 }
 145
 146 static int llog_print_cb(struct llog_handle *handle, struct llog_rec_hdr *rec,
 147                          void *data)
 148 {
 149         struct obd_ioctl_data *ioc_data = (struct obd_ioctl_data *)data;
 150         static int l, remains, from, to;
 151         static char *out;
 152         char *endp;
 153         int cur_index;
 154
 155         if (ioc_data->ioc_inllen1) {
 156                 l = 0;
 157                 remains = ioc_data->ioc_inllen4 +
 158                         size_round(ioc_data->ioc_inllen1) +
 159                         size_round(ioc_data->ioc_inllen2) +
 160                         size_round(ioc_data->ioc_inllen3);
 161                 from = simple_strtol(ioc_data->ioc_inlbuf2, &endp, 0);
 162                 if (*endp != '\0')
 163                         RETURN(-EINVAL);
 164                 to = simple_strtol(ioc_data->ioc_inlbuf3, &endp, 0);
 165                 if (*endp != '\0')
 166                         RETURN(-EINVAL);
 167                 out = ioc_data->ioc_bulk;
 168                 ioc_data->ioc_inllen1 = 0;
 169         }
 170
 171         cur_index = rec->lrh_index;
 172         if (cur_index < from)
 173                 RETURN(0);
 174         if (to > 0 && cur_index > to)
 175                 RETURN(-LLOG_EEMPTY);
 176
 177         if (handle->lgh_hdr->llh_flags & LLOG_F_IS_CAT) {
 178                 struct llog_logid_rec *lir = (struct llog_logid_rec *)rec;
 179                 if (rec->lrh_type != LLOG_LOGID_MAGIC) {
 180                         CERROR("invalid record in catalog\n");
 181                         RETURN(-EINVAL);
 182                 }
 183
 184                 l = snprintf(out, remains,
 185                              "[index]: %05d  [logid]: #"LPX64"#"LPX64"#%08x\n",
 186                              cur_index, lir->lid_id.lgl_oid,
 187                              lir->lid_id.lgl_ogr, lir->lid_id.lgl_ogen);
 188         } else {
 189                 l = snprintf(out, remains,
 190                              "[index]: %05d  [type]: %02x  [len]: %04d\n",
 191                              cur_index, rec->lrh_type,
 192                              rec->lrh_len);
 193         }
 194         out += l;
 195         remains -= l;
 196         if (remains <= 0) {
 197                 CERROR("not enough space for print log records\n");
 198                 RETURN(-LLOG_EEMPTY);
 199         }
 200
 201         RETURN(0);
 202 }
 203 static int llog_remove_log(struct llog_handle *cat, struct llog_logid *logid)
 204 {
 205         struct llog_handle *log;
 206         int rc, index = 0;
 207
 208         down_write(&cat->lgh_lock);
 209         rc = llog_cat_id2handle(cat, &log, logid);
 210         if (rc) {
 211                 CDEBUG(D_IOCTL, "cannot find log #"LPX64"#"LPX64"#%08x\n",
 212                        logid->lgl_oid, logid->lgl_ogr, logid->lgl_ogen);
 213                 GOTO(out, rc = -ENOENT);
 214         }
 215
 216         index = log->u.phd.phd_cookie.lgc_index;
 217         LASSERT(index);
 218         rc = llog_destroy(log);
 219         if (rc) {
 220                 CDEBUG(D_IOCTL, "cannot destroy log\n");
 221                 GOTO(out, rc);
 222         }
 223         llog_cat_set_first_idx(cat, index);
 224         rc = llog_cancel_rec(cat, index);
 225 out:
 226         llog_free_handle(log);
 227         up_write(&cat->lgh_lock);
 228         RETURN(rc);
 229
 230 }
 231
 232 static int llog_delete_cb(struct llog_handle *handle, struct llog_rec_hdr *rec,
 233                           void *data)
 234 {
 235         struct  llog_logid_rec *lir = (struct llog_logid_rec*)rec;
 236         int     rc;
 237
 238         if (rec->lrh_type != LLOG_LOGID_MAGIC)
 239               return (-EINVAL);
 240         rc = llog_remove_log(handle, &lir->lid_id);
 241
 242         RETURN(rc);
 243 }
 244
 245
 246 int llog_ioctl(struct llog_ctxt *ctxt, int cmd, struct obd_ioctl_data *data)
 247 {
 248         struct llog_logid logid;
 249         int err = 0;
 250         struct llog_handle *handle = NULL;
 251
 252         if (*data->ioc_inlbuf1 == '#') {
 253                 err = str2logid(&logid, data->ioc_inlbuf1, data->ioc_inllen1);
 254                 if (err)
 255                         GOTO(out, err);
 256                 err = llog_create(ctxt, &handle, &logid, NULL);
 257                 if (err)
 258                         GOTO(out, err);
 259         } else if (*data->ioc_inlbuf1 == '$') {
 260                 char *name = data->ioc_inlbuf1 + 1;
 261                 err = llog_create(ctxt, &handle, NULL, name);
 262                 if (err)
 263                         GOTO(out, err);
 264         } else {
 265                 GOTO(out, err = -EINVAL);
 266         }
 267
 268         err = llog_init_handle(handle, 0, NULL);
 269         if (err)
 270                 GOTO(out_close, err = -ENOENT);
 271
 272         switch (cmd) {
 273         case OBD_IOC_LLOG_INFO: {
 274                 int l;
 275                 int remains = data->ioc_inllen2 +
 276                         size_round(data->ioc_inllen1);
 277                 char *out = data->ioc_bulk;
 278
 279                 l = snprintf(out, remains,
 280                              "logid:            #"LPX64"#"LPX64"#%08x\n"
 281                              "flags:            %x (%s)\n"
 282                              "records count:    %d\n"
 283                              "last index:       %d\n",
 284                              handle->lgh_id.lgl_oid, handle->lgh_id.lgl_ogr,
 285                              handle->lgh_id.lgl_ogen,
 286                              handle->lgh_hdr->llh_flags,
 287                              handle->lgh_hdr->llh_flags &
 288                              LLOG_F_IS_CAT ? "cat" : "plain",
 289                              handle->lgh_hdr->llh_count,
 290                              handle->lgh_last_idx);
 291                 out += l;
 292                 remains -= l;
 293                 if (remains <= 0)
 294                         CERROR("not enough space for log header info\n");
 295
 296                 GOTO(out_close, err);
 297         }
 298         case OBD_IOC_LLOG_CHECK: {
 299                 LASSERT(data->ioc_inllen1);
 300                 err = llog_process(handle, llog_check_cb, data, NULL);
 301                 if (err == -LLOG_EEMPTY)
 302                         err = 0;
 303                 GOTO(out_close, err);
 304         }
 305
 306         case OBD_IOC_LLOG_PRINT: {
 307                 LASSERT(data->ioc_inllen1);
 308                 err = llog_process(handle, llog_print_cb, data, NULL);
 309                 if (err == -LLOG_EEMPTY)
 310                         err = 0;
 311
 312                 GOTO(out_close, err);
 313         }
 314         case OBD_IOC_LLOG_CANCEL: {
 315                 struct llog_cookie cookie;
 316                 struct llog_logid plain;
 317                 char *endp;
 318
 319                 cookie.lgc_index = simple_strtoul(data->ioc_inlbuf3, &endp, 0);
 320                 if (*endp != '\0')
 321                         GOTO(out_close, err = -EINVAL);
 322
 323                 if (handle->lgh_hdr->llh_flags & LLOG_F_IS_CAT) {
 324                         down_write(&handle->lgh_lock);
 325                         err = llog_cancel_rec(handle, cookie.lgc_index);
 326                         up_write(&handle->lgh_lock);
 327                         GOTO(out_close, err);
 328                 }
 329
 330                 err = str2logid(&plain, data->ioc_inlbuf2, data->ioc_inllen2);
 331                 if (err)
 332                         GOTO(out_close, err);
 333                 cookie.lgc_lgl = plain;
 334
 335                 if (!(handle->lgh_hdr->llh_flags & LLOG_F_IS_CAT))
 336                         GOTO(out_close, err = -EINVAL);
 337
 338                 err = llog_cat_cancel_records(handle, 1, &cookie);
 339                 GOTO(out_close, err);
 340         }
 341         case OBD_IOC_LLOG_REMOVE: {
 342                 struct llog_logid plain;
 343
 344                 if (handle->lgh_hdr->llh_flags & cpu_to_le32(LLOG_F_IS_PLAIN)) {
 345                         err = llog_destroy(handle);
 346                         if (!err)
 347                                 llog_free_handle(handle);
 348                         GOTO(out, err);
 349                 }
 350
 351                 if (!(handle->lgh_hdr->llh_flags & LLOG_F_IS_CAT))
 352                         GOTO(out_close, err = -EINVAL);
 353
 354                 if (data->ioc_inlbuf2) {
 355                         /*remove indicate log from the catalog*/
 356                         err = str2logid(&plain, data->ioc_inlbuf2,
 357                                         data->ioc_inllen2);
 358                         if (err)
 359                                 GOTO(out_close, err);
 360                         err = llog_remove_log(handle, &plain);
 361                 } else {
 362                         /*remove all the log of the catalog*/
 363                         llog_process(handle, llog_delete_cb, NULL, NULL);
 364                 }
 365                 GOTO(out_close, err);
 366         }
 367         }
 368
 369 out_close:
 370         if (handle->lgh_hdr &&
 371             handle->lgh_hdr->llh_flags & LLOG_F_IS_CAT)
 372                 llog_cat_put(handle);
 373         else
 374                 llog_close(handle);
 375 out:
 376         RETURN(err);
 377 }
 378 EXPORT_SYMBOL(llog_ioctl);
 379
 380 int llog_catlog_list(struct obd_device *obd, int count,
 381                      struct obd_ioctl_data *data)
 382 {
 383         int size, i;
 384         struct llog_catid *idarray;
 385         struct llog_logid *id;
 386         char name[32] = CATLIST;
 387         char *out;
 388         int l, remains, rc = 0;
 389
 390         size = sizeof(*idarray) * count;
 391
 392         OBD_ALLOC(idarray, size);
 393         if (!idarray)
 394                 RETURN(-ENOMEM);
 395         memset(idarray, 0, size);
 396
 397         rc = llog_get_cat_list(obd, obd, name, count, idarray);
 398         if (rc) {
 399                 OBD_FREE(idarray, size);
 400                 RETURN(rc);
 401         }
 402
 403         out = data->ioc_bulk;
 404         remains = data->ioc_inllen1;
 405         for (i = 0; i < count; i++) {
 406                 id = &idarray[i].lci_logid;
 407                 l = snprintf(out, remains,
 408                              "catalog log: #"LPX64"#"LPX64"#%08x\n",
 409                              id->lgl_oid, id->lgl_ogr, id->lgl_ogen);
 410                 out += l;
 411                 remains -= l;
 412                 if (remains <= 0) {
 413                         CWARN("not enough memory for catlog list\n");
 414                         break;
 415                 }
 416         }
 417         OBD_FREE(idarray, size);
 418         RETURN(0);
 419
 420 }
 421 EXPORT_SYMBOL(llog_catlog_list);