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, 16);
  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, 16);
  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 = le32_to_cpu(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 & cpu_to_le32(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 != cpu_to_le32(LLOG_LOGID_MAGIC)) {
  98                         l = snprintf(out, remains,
  99                                      "[index]: %05d  [type]: %02x  [len]: %04d failed\n",
 100                                      cur_index, le32_to_cpu(rec->lrh_type),
 101                                      le32_to_cpu(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);
 107                 llog_close(log_handle);
 108         } else {
 109                 switch (le32_to_cpu(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,
 117                                      "[index]: %05d  [type]: %02x  [len]: %04d ok\n",
 118                                      cur_index, le32_to_cpu(rec->lrh_type),
 119                                      le32_to_cpu(rec->lrh_len));
 120                          out += l;
 121                          remains -= l;
 122                          if (remains <= 0) {
 123                                 CERROR("not enough space for print log records\n");
 124                                 RETURN(-LLOG_EEMPTY);
 125                          }
 126                          RETURN(0);
 127                 }
 128                 default: {
 129                          l = snprintf(out, remains,
 130                                      "[index]: %05d  [type]: %02x  [len]: %04d failed\n",
 131                                      cur_index, le32_to_cpu(rec->lrh_type),
 132                                      le32_to_cpu(rec->lrh_len));
 133                          out += l;
 134                          remains -= l;
 135                          if (remains <= 0) {
 136                                 CERROR("not enough space for 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 = le32_to_cpu(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 & cpu_to_le32(LLOG_F_IS_CAT)) {
 178                 struct llog_logid_rec *lir = (struct llog_logid_rec *)rec;
 179                 if (rec->lrh_type != cpu_to_le32(LLOG_LOGID_MAGIC)) {
 180                         CERROR("invalid record in catalog\n");
 181                         RETURN(-EINVAL);
 182                 }
 183
 184                 l = snprintf(out, remains,
 185                              "[index]: %05d  [logid]: #%llx#%llx#%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, le32_to_cpu(rec->lrh_type),
 192                              le32_to_cpu(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 #%0llx#%0llx#%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         rc = llog_cancel_rec(cat, index);
 224 out:
 225         llog_free_handle(log);
 226         up_write(&cat->lgh_lock);
 227         RETURN(rc);
 228
 229 }
 230 static int llog_delete_cb(struct llog_handle *handle, struct llog_rec_hdr *rec,
 231                          void *data)
 232 {
 233         struct  llog_logid_rec *lir = (struct llog_logid_rec*)rec;
 234         int     rc;
 235
 236         if (rec->lrh_type != cpu_to_le32(LLOG_LOGID_MAGIC))
 237               return (-EINVAL);
 238         rc = llog_remove_log(handle, &lir->lid_id);
 239
 240         RETURN(rc);
 241 }
 242
 243
 244 int llog_ioctl(struct llog_ctxt *ctxt, int cmd, struct obd_ioctl_data *data)
 245 {
 246         struct llog_logid logid;
 247         int err = 0;
 248         struct llog_handle *handle = NULL;
 249
 250         if (*data->ioc_inlbuf1 == '#') {
 251                 err = str2logid(&logid, data->ioc_inlbuf1, data->ioc_inllen1);
 252                 if (err)
 253                         GOTO(out, err);
 254                 err = llog_create(ctxt, &handle, &logid, NULL);
 255                 if (err)
 256                         GOTO(out, err);
 257         } else if (*data->ioc_inlbuf1 == '$') {
 258                 char *name = data->ioc_inlbuf1 + 1;
 259                 err = llog_create(ctxt, &handle, NULL, name);
 260                 if (err)
 261                         GOTO(out, err);
 262         } else {
 263                 GOTO(out, err = -EINVAL);
 264         }
 265
 266         err = llog_init_handle(handle, 0, NULL);
 267         if (err)
 268                 GOTO(out_close, err = -ENOENT);
 269
 270         switch (cmd) {
 271         case OBD_IOC_LLOG_INFO: {
 272                 int l;
 273                 int remains = data->ioc_inllen2 +
 274                         size_round(data->ioc_inllen1);
 275                 char *out = data->ioc_bulk;
 276
 277                 l = snprintf(out, remains,
 278                              "logid:            #%llx#%llx#%08x\n"
 279                              "flags:            %x (%s)\n"
 280                              "records count:    %d\n"
 281                              "last index:       %d\n",
 282                              handle->lgh_id.lgl_oid, handle->lgh_id.lgl_ogr,
 283                              handle->lgh_id.lgl_ogen,
 284                              le32_to_cpu(handle->lgh_hdr->llh_flags),
 285                              le32_to_cpu(handle->lgh_hdr->llh_flags) &
 286                              LLOG_F_IS_CAT ? "cat" : "plain",
 287                              le32_to_cpu(handle->lgh_hdr->llh_count),
 288                              handle->lgh_last_idx);
 289                 out += l;
 290                 remains -= l;
 291                 if (remains <= 0)
 292                         CERROR("not enough space for log header info\n");
 293
 294                 GOTO(out_close, err);
 295         }
 296         case OBD_IOC_LLOG_CHECK: {
 297                 LASSERT(data->ioc_inllen1);
 298                 err = llog_process(handle, llog_check_cb, data);
 299                 if (err == -LLOG_EEMPTY)
 300                         err = 0;
 301                 GOTO(out_close, err);
 302         }
 303
 304         case OBD_IOC_LLOG_PRINT: {
 305                 LASSERT(data->ioc_inllen1);
 306                 err = llog_process(handle, llog_print_cb, data);
 307                 if (err == -LLOG_EEMPTY)
 308                         err = 0;
 309
 310                 GOTO(out_close, err);
 311         }
 312         case OBD_IOC_LLOG_CANCEL: {
 313                 struct llog_cookie cookie;
 314                 struct llog_logid plain;
 315                 char *endp;
 316
 317                 if (!(handle->lgh_hdr->llh_flags & cpu_to_le32(LLOG_F_IS_CAT)))
 318                         GOTO(out_close, err = -EINVAL);
 319
 320                 err = str2logid(&plain, data->ioc_inlbuf2, data->ioc_inllen2);
 321                 if (err)
 322                         GOTO(out_close, err);
 323                 cookie.lgc_lgl = plain;
 324                 cookie.lgc_index = simple_strtoul(data->ioc_inlbuf3,
 325                                                   &endp, 0);
 326                 if (*endp != '\0')
 327                         GOTO(out_close, err = -EINVAL);
 328
 329                 err = llog_cat_cancel_records(handle, 1, &cookie);
 330                 GOTO(out_close, err);
 331         }
 332         case OBD_IOC_LLOG_REMOVE: {
 333                 struct llog_logid plain;
 334
 335                 if (!(handle->lgh_hdr->llh_flags & cpu_to_le32(LLOG_F_IS_CAT)))
 336                         GOTO(out_close, err = -EINVAL);
 337
 338                 if (data->ioc_inlbuf2) {
 339                         /*remove indicate log from the catalog*/
 340                         err = str2logid(&plain, data->ioc_inlbuf2, data->ioc_inllen2);
 341                         if (err)
 342                                 GOTO(out_close, err);
 343                         err = llog_remove_log(handle, &plain);
 344                 } else {
 345                         /*remove all the log of the catalog*/
 346                         llog_process(handle, llog_delete_cb, NULL);
 347                 }
 348                 GOTO(out_close, err);
 349         }
 350         }
 351
 352 out_close:
 353         if (handle->lgh_hdr &&
 354             handle->lgh_hdr->llh_flags & cpu_to_le32(LLOG_F_IS_CAT))
 355                 llog_cat_put(handle);
 356         else
 357                 llog_close(handle);
 358 out:
 359         RETURN(err);
 360 }
 361 EXPORT_SYMBOL(llog_ioctl);
 362
 363 int llog_catlog_list(struct obd_device *obd, int count,
 364                      struct obd_ioctl_data *data)
 365 {
 366         int size, i;
 367         struct llog_logid *idarray, *id;
 368         char name[32] = "CATLIST";
 369         char *out;
 370         int l, remains, rc = 0;
 371
 372         size = sizeof(*idarray) * count;
 373
 374         OBD_ALLOC(idarray, size);
 375         if (!idarray)
 376                 RETURN(-ENOMEM);
 377         memset(idarray, 0, size);
 378
 379         rc = llog_get_cat_list(obd, obd, name, count, idarray);
 380         if (rc) {
 381                 OBD_FREE(idarray, size);
 382                 RETURN(rc);
 383         }
 384
 385         out = data->ioc_bulk;
 386         remains = data->ioc_inllen1;
 387         id = idarray;
 388         for (i = 0; i < count; i++) {
 389                 l = snprintf(out, remains,
 390                              "catalog log: #%llx#%llx#%08x\n",
 391                              id->lgl_oid, id->lgl_ogr, id->lgl_ogen);
 392                 id++;
 393                 out += l;
 394                 remains -= l;
 395                 if (remains <= 0) {
 396                         CWARN("not enough memory for catlog list\n");
 397                         break;
 398                 }
 399         }
 400         OBD_FREE(idarray, size);
 401         RETURN(0);
 402
 403 }
 404 EXPORT_SYMBOL(llog_catlog_list);