lustre/tests/ll_dirstripe_verify.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.gnu.org/licenses/gpl-2.0.html
  19  *
  20  * GPL HEADER END
  21  */
  22 /*
  23  * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Use is subject to license terms.
  25  *
  26  * Copyright (c) 2011, 2017, Intel Corporation.
  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/tests/ll_dirstripe_verify.c
  33  *
  34  * ll_dirstripe_verify <dir> <file>:
  35  * - to verify if the file has the same lov_user_md setting as the parent dir.
  36  * - if dir's offset is set -1, ll_dirstripe_verify <dir> <file1> <file2>
  37  *      is used to further verify if file1 and file2's obdidx is continuous.
  38  */
  39
  40 #include <stdio.h>
  41 #include <stdlib.h>
  42 #include <string.h>
  43 #include <ctype.h>
  44 #include <sys/ioctl.h>
  45 #include <unistd.h>
  46 #include <fcntl.h>
  47 #include <errno.h>
  48 #include <dirent.h>
  49
  50 #include <libcfs/util/param.h>
  51 #include <libcfs/util/string.h>
  52 #include <lustre/lustreapi.h>
  53 #include <linux/lustre/lustre_idl.h>
  54
  55 #define MAX_LOV_UUID_COUNT      1000
  56
  57 /*
  58  * Returns bytes read on success and a negative value on failure.
  59  * If zero bytes are read it will be treated as failure as such
  60  * zero cannot be returned from this function.
  61  */
  62 int read_proc_entry(char *proc_path, char *buf, int len)
  63 {
  64         int rc, fd;
  65
  66         memset(buf, 0, len);
  67
  68         fd = open(proc_path, O_RDONLY);
  69         if (fd < 0) {
  70                 llapi_error(LLAPI_MSG_ERROR, -errno, "cannot open '%s'",
  71                             proc_path);
  72                 return -2;
  73         }
  74
  75         rc = read(fd, buf, len - 1);
  76         if (rc < 0) {
  77                 llapi_error(LLAPI_MSG_ERROR, -errno,
  78                             "error reading from '%s'", proc_path);
  79                 rc = -3;
  80         } else if (rc == 0) {
  81                 llapi_err_noerrno(LLAPI_MSG_ERROR,
  82                                   "read zero bytes from '%s'", proc_path);
  83                 rc = -4;
  84         } else if (buf[rc - 1] == '\n') {
  85                 buf[rc - 1] = '\0'; /* Remove trailing newline */
  86         }
  87
  88         close(fd);
  89
  90         return rc;
  91 }
  92
  93 int compare(struct obd_uuid *puuid, struct lov_user_md *lum_dir,
  94             struct lov_user_md *lum_file1, struct lov_user_md *lum_file2)
  95 {
  96         int stripe_count = 0, min_stripe_count = 0, def_stripe_count = 1;
  97         int stripe_size = 0;
  98         int stripe_offset = -1;
  99         int ost_count;
 100         char buf[128];
 101         glob_t path;
 102         int i;
 103
 104         if (cfs_get_param_paths(&path, "lov/%s/stripecount", puuid->uuid) != 0)
 105                 return 2;
 106         if (read_proc_entry(path.gl_pathv[0], buf, sizeof(buf)) < 0) {
 107                 cfs_free_param_data(&path);
 108                 return 5;
 109         }
 110         cfs_free_param_data(&path);
 111         def_stripe_count = (short)atoi(buf);
 112
 113         if (cfs_get_param_paths(&path, "lov/%s/numobd", puuid->uuid) != 0)
 114                 return 2;
 115         if (read_proc_entry(path.gl_pathv[0], buf, sizeof(buf)) < 0) {
 116                 cfs_free_param_data(&path);
 117                 return 6;
 118         }
 119         cfs_free_param_data(&path);
 120         ost_count = atoi(buf);
 121
 122         if (!lum_dir) {
 123                 stripe_count = def_stripe_count;
 124                 min_stripe_count = -1;
 125         } else {
 126                 stripe_count = (signed short)lum_dir->lmm_stripe_count;
 127                 printf("dir stripe %d, ", stripe_count);
 128                 min_stripe_count = 1;
 129         }
 130
 131         printf("default stripe %d, ost count %d\n",
 132                def_stripe_count, ost_count);
 133
 134         if (stripe_count == 0) {
 135                 min_stripe_count = -1;
 136                 stripe_count = 1;
 137         }
 138
 139         stripe_count = (stripe_count > 0 && stripe_count <= ost_count) ?
 140                                                 stripe_count : ost_count;
 141         min_stripe_count = min_stripe_count > 0 ? stripe_count :
 142                                                 ((stripe_count + 1) / 2);
 143
 144         if (lum_file1->lmm_stripe_count != stripe_count ||
 145             lum_file1->lmm_stripe_count < min_stripe_count) {
 146                 llapi_err_noerrno(LLAPI_MSG_ERROR,
 147                                   "file1 stripe count %d != dir %d\n",
 148                                   lum_file1->lmm_stripe_count, stripe_count);
 149                 return 7;
 150         }
 151
 152         if (lum_file1->lmm_stripe_count < stripe_count)
 153                 llapi_err_noerrno(LLAPI_MSG_WARN,
 154                                   "warning: file1 used fewer stripes %d < dir %d (likely due to bug 4900)\n",
 155                                   lum_file1->lmm_stripe_count, stripe_count);
 156
 157         if (lum_dir)
 158                 stripe_size = (int)lum_dir->lmm_stripe_size;
 159         if (stripe_size == 0) {
 160                 if (cfs_get_param_paths(&path, "lov/%s/stripesize",
 161                                         puuid->uuid) != 0)
 162                         return 2;
 163                 if (read_proc_entry(path.gl_pathv[0], buf, sizeof(buf)) < 0) {
 164                         cfs_free_param_data(&path);
 165                         return 5;
 166                 }
 167                 cfs_free_param_data(&path);
 168
 169                 stripe_size = atoi(buf);
 170         }
 171
 172         if (lum_file1->lmm_stripe_size != stripe_size) {
 173                 llapi_err_noerrno(LLAPI_MSG_ERROR,
 174                                   "file1 stripe size %d != dir %d\n",
 175                                   lum_file1->lmm_stripe_size, stripe_size);
 176                 return 8;
 177         }
 178
 179         if (lum_dir)
 180                 stripe_offset = (short int)lum_dir->lmm_stripe_offset;
 181         if (stripe_offset != -1) {
 182                 for (i = 0; i < stripe_count; i++)
 183                         if (lum_file1->lmm_objects[i].l_ost_idx !=
 184                             (stripe_offset + i) % ost_count) {
 185                                 llapi_err_noerrno(LLAPI_MSG_WARN,
 186                                                   "warning: file1 non-sequential stripe[%d] %d != %d\n",
 187                                                   i, lum_file1->lmm_objects[i].l_ost_idx,
 188                                                   (stripe_offset + i) %
 189                                                   ost_count);
 190                         }
 191         } else if (lum_file2) {
 192                 int next, idx, stripe = stripe_count - 1;
 193
 194                 next = (lum_file1->lmm_objects[stripe].l_ost_idx + 1) %
 195                         ost_count;
 196                 idx = lum_file2->lmm_objects[0].l_ost_idx;
 197                 if (idx != next) {
 198                         llapi_err_noerrno(LLAPI_MSG_WARN,
 199                                           "warning: non-sequential file1 stripe[%d] %d != file2 stripe[0] %d\n",
 200                                           stripe,
 201                                           lum_file1->lmm_objects[stripe].l_ost_idx,
 202                                           idx);
 203                 }
 204         }
 205
 206         return 0;
 207 }
 208
 209 int compare_lum(struct obd_uuid *puuid, struct lov_user_md *lum_dir,
 210                 struct lov_user_md *lum_file1, struct lov_user_md *lum_file2)
 211 {
 212         struct lov_comp_md_v1 *comp_dir, *comp_file1;
 213         struct lov_user_md *sub_dir, *sub_file1;
 214         int i, rc = 0;
 215
 216         if (!lum_dir || lum_dir->lmm_magic != LOV_MAGIC_COMP_V1)
 217                 return compare(puuid, lum_dir, lum_file1, lum_file2);
 218
 219         comp_dir = (struct lov_comp_md_v1 *)lum_dir;
 220         comp_file1 = (struct lov_comp_md_v1 *)lum_file1;
 221
 222         if (lum_file1->lmm_magic != lum_dir->lmm_magic) {
 223                 llapi_err_noerrno(LLAPI_MSG_ERROR, "file1 magic %#x != %#x\n",
 224                                   lum_file1->lmm_magic, lum_dir->lmm_magic);
 225                 return 10;
 226         }
 227
 228         if (comp_file1->lcm_entry_count != comp_dir->lcm_entry_count) {
 229                 llapi_err_noerrno(LLAPI_MSG_ERROR, "file1 comp cnt %d != %d\n",
 230                                   comp_file1->lcm_entry_count,
 231                                   comp_dir->lcm_entry_count);
 232                 return 11;
 233         }
 234
 235         for (i = 0; i < comp_dir->lcm_entry_count; i++) {
 236                 sub_dir = (struct lov_user_md *)((char *)comp_dir +
 237                                 comp_dir->lcm_entries[i].lcme_offset);
 238                 sub_file1 = (struct lov_user_md *)((char *)comp_file1 +
 239                                 comp_file1->lcm_entries[i].lcme_offset);
 240
 241                 rc = compare(puuid, sub_dir, sub_file1, NULL);
 242                 if (rc)
 243                         break;
 244         }
 245
 246         return rc;
 247 }
 248
 249 int main(int argc, char **argv)
 250 {
 251         struct lov_user_md *lum_dir, *lum_file1 = NULL, *lum_file2 = NULL;
 252         struct obd_uuid uuid;
 253         int lum_size, rc;
 254         DIR *dir;
 255
 256         if (argc < 3) {
 257                 llapi_err_noerrno(LLAPI_MSG_ERROR,
 258                                   "Usage: %s <dirname> <filename1> [filename2]\n",
 259                                   argv[0]);
 260                 return 1;
 261         }
 262
 263         dir = opendir(argv[1]);
 264         if (!dir) {
 265                 rc = -errno;
 266                 llapi_error(LLAPI_MSG_ERROR, rc,
 267                             "error: %s opendir failed", argv[1]);
 268                 return rc;
 269         }
 270
 271         lum_size = lov_user_md_size(MAX_LOV_UUID_COUNT, LOV_USER_MAGIC);
 272         lum_dir = (struct lov_user_md *)malloc(lum_size);
 273         if (!lum_dir) {
 274                 rc = -ENOMEM;
 275                 llapi_error(LLAPI_MSG_ERROR, rc,
 276                             "error: can't allocate %d bytes for dir EA",
 277                             lum_size);
 278                 goto cleanup;
 279         }
 280
 281         rc = llapi_file_get_stripe(argv[1], lum_dir);
 282         if (rc == -ENODATA) {
 283                 char root[PATH_MAX], path[PATH_MAX + 2];
 284
 285                 rc = llapi_search_mounts(argv[1], 0, root, NULL);
 286                 if (rc) {
 287                         llapi_error(LLAPI_MSG_ERROR, rc,
 288                                     "error: can't get root path for %s\n",
 289                                     argv[1]);
 290                         goto cleanup;
 291                 }
 292
 293                 snprintf(path, sizeof(path), "%s/.", root);
 294                 rc = llapi_file_get_stripe(path, lum_dir);
 295                 if (rc == -ENODATA) {
 296                         free(lum_dir);
 297                         lum_dir = NULL;
 298                 } else if (rc) {
 299                         llapi_error(LLAPI_MSG_ERROR, rc,
 300                                     "error: cant't get root's LOVEA for %s\n",
 301                                     path);
 302                         goto cleanup;
 303                 }
 304         } else if (rc) {
 305                 llapi_error(LLAPI_MSG_ERROR, rc,
 306                             "error: can't get LOVEA for %s", argv[1]);
 307                 goto cleanup;
 308         }
 309
 310         /* XXX should be llapi_lov_getname() */
 311         rc = llapi_file_get_lov_uuid(argv[1], &uuid);
 312         if (rc) {
 313                 llapi_error(LLAPI_MSG_ERROR, rc,
 314                             "error: can't get lov name for %s",
 315                             argv[1]);
 316                 return rc;
 317         }
 318
 319         lum_file1 = malloc(lum_size);
 320         if (!lum_file1) {
 321                 rc = -ENOMEM;
 322                 llapi_error(LLAPI_MSG_ERROR, rc,
 323                             "error: can't allocate %d bytes for EA",
 324                             lum_size);
 325                 goto cleanup;
 326         }
 327
 328         rc = llapi_file_get_stripe(argv[2], lum_file1);
 329         if (rc) {
 330                 llapi_error(LLAPI_MSG_ERROR, rc,
 331                             "error: unable to get EA for %s", argv[2]);
 332                 goto cleanup;
 333         }
 334
 335         if (argc == 4) {
 336                 lum_file2 = (struct lov_user_md *)malloc(lum_size);
 337                 if (!lum_file2) {
 338                         rc = -ENOMEM;
 339                         llapi_error(LLAPI_MSG_ERROR, rc,
 340                                     "error: can't allocate %d bytes for file2 EA",
 341                                     lum_size);
 342                         goto cleanup;
 343                 }
 344
 345                 rc = llapi_file_get_stripe(argv[3], lum_file2);
 346                 if (rc) {
 347                         llapi_error(LLAPI_MSG_ERROR, rc,
 348                                     "error: can't get EA for %s", argv[3]);
 349                         goto cleanup;
 350                 }
 351         }
 352
 353         rc = compare_lum(&uuid, lum_dir, lum_file1, lum_file2);
 354
 355 cleanup:
 356         closedir(dir);
 357         if (lum_dir)
 358                 free(lum_dir);
 359         if (lum_file1)
 360                 free(lum_file1);
 361         if (lum_file2)
 362                 free(lum_file2);
 363
 364         return rc;
 365 }