ceph/src/dpdk/app/test/resource.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2016 RehiveTech. All rights reserved.
   5  *   All rights reserved.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of RehiveTech nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include <stdio.h>
  35 #include <string.h>
  36 #include <errno.h>
  37 #include <sys/queue.h>
  38
  39 #include <rte_debug.h>
  40
  41 #include "resource.h"
  42
  43 struct resource_list resource_list = TAILQ_HEAD_INITIALIZER(resource_list);
  44
  45 size_t resource_size(const struct resource *r)
  46 {
  47         return r->end - r->begin;
  48 }
  49
  50 const struct resource *resource_find(const char *name)
  51 {
  52         struct resource *r;
  53
  54         TAILQ_FOREACH(r, &resource_list, next) {
  55                 RTE_VERIFY(r->name);
  56
  57                 if (!strcmp(r->name, name))
  58                         return r;
  59         }
  60
  61         return NULL;
  62 }
  63
  64 int resource_fwrite(const struct resource *r, FILE *f)
  65 {
  66         const size_t goal = resource_size(r);
  67         size_t total = 0;
  68
  69         while (total < goal) {
  70                 size_t wlen = fwrite(r->begin + total, 1, goal - total, f);
  71                 if (wlen == 0) {
  72                         perror(__func__);
  73                         return -1;
  74                 }
  75
  76                 total += wlen;
  77         }
  78
  79         return 0;
  80 }
  81
  82 int resource_fwrite_file(const struct resource *r, const char *fname)
  83 {
  84         FILE *f;
  85         int ret;
  86
  87         f = fopen(fname, "w");
  88         if (f == NULL) {
  89                 perror(__func__);
  90                 return -1;
  91         }
  92
  93         ret = resource_fwrite(r, f);
  94         fclose(f);
  95         return ret;
  96 }
  97
  98 #ifdef RTE_APP_TEST_RESOURCE_TAR
  99 #include <archive.h>
 100 #include <archive_entry.h>
 101
 102 static int do_copy(struct archive *r, struct archive *w)
 103 {
 104         const void *buf;
 105         size_t len;
 106 #if ARCHIVE_VERSION_NUMBER >= 3000000
 107         int64_t off;
 108 #else
 109         off_t off;
 110 #endif
 111         int ret;
 112
 113         while (1) {
 114                 ret = archive_read_data_block(r, &buf, &len, &off);
 115                 if (ret == ARCHIVE_RETRY)
 116                         continue;
 117
 118                 if (ret == ARCHIVE_EOF)
 119                         return 0;
 120
 121                 if (ret != ARCHIVE_OK)
 122                         return ret;
 123
 124                 do {
 125                         ret = archive_write_data_block(w, buf, len, off);
 126                         if (ret != ARCHIVE_OK && ret != ARCHIVE_RETRY)
 127                                 return ret;
 128                 } while (ret != ARCHIVE_OK);
 129         }
 130 }
 131
 132 int resource_untar(const struct resource *res)
 133 {
 134         struct archive *r;
 135         struct archive *w;
 136         struct archive_entry *e;
 137         void *p;
 138         int flags = 0;
 139         int ret;
 140
 141         p = malloc(resource_size(res));
 142         if (p == NULL)
 143                 rte_panic("Failed to malloc %zu B\n", resource_size(res));
 144
 145         memcpy(p, res->begin, resource_size(res));
 146
 147         r = archive_read_new();
 148         if (r == NULL) {
 149                 free(p);
 150                 return -1;
 151         }
 152
 153         archive_read_support_format_all(r);
 154         archive_read_support_filter_all(r);
 155
 156         w = archive_write_disk_new();
 157         if (w == NULL) {
 158                 archive_read_free(r);
 159                 free(p);
 160                 return -1;
 161         }
 162
 163         flags |= ARCHIVE_EXTRACT_PERM;
 164         flags |= ARCHIVE_EXTRACT_FFLAGS;
 165         archive_write_disk_set_options(w, flags);
 166         archive_write_disk_set_standard_lookup(w);
 167
 168         ret = archive_read_open_memory(r, p, resource_size(res));
 169         if (ret != ARCHIVE_OK)
 170                 goto fail;
 171
 172         while (1) {
 173                 ret = archive_read_next_header(r, &e);
 174                 if (ret == ARCHIVE_EOF)
 175                         break;
 176                 if (ret != ARCHIVE_OK)
 177                         goto fail;
 178
 179                 ret = archive_write_header(w, e);
 180                 if (ret == ARCHIVE_EOF)
 181                         break;
 182                 if (ret != ARCHIVE_OK)
 183                         goto fail;
 184
 185                 if (archive_entry_size(e) == 0)
 186                         continue;
 187
 188                 ret = do_copy(r, w);
 189                 if (ret != ARCHIVE_OK)
 190                         goto fail;
 191
 192                 ret = archive_write_finish_entry(w);
 193                 if (ret != ARCHIVE_OK)
 194                         goto fail;
 195         }
 196
 197         archive_write_free(w);
 198         archive_read_free(r);
 199         free(p);
 200         return 0;
 201
 202 fail:
 203         archive_write_free(w);
 204         archive_read_free(r);
 205         free(p);
 206         rte_panic("Failed: %s\n", archive_error_string(r));
 207         return -1;
 208 }
 209
 210 int resource_rm_by_tar(const struct resource *res)
 211 {
 212         struct archive *r;
 213         struct archive_entry *e;
 214         void *p;
 215         int try_again = 1;
 216         int attempts = 0;
 217         int ret;
 218
 219         p = malloc(resource_size(res));
 220         if (p == NULL)
 221                 rte_panic("Failed to malloc %zu B\n", resource_size(res));
 222
 223         memcpy(p, res->begin, resource_size(res));
 224
 225         /*
 226          * If somebody creates a file somewhere inside the extracted TAR
 227          * hierarchy during a test the resource_rm_by_tar might loop
 228          * infinitely. We prevent this by adding the attempts counter there.
 229          * In normal case, max N iteration is done where N is the depth of
 230          * the file-hierarchy.
 231          */
 232         while (try_again && attempts < 10000) {
 233                 r = archive_read_new();
 234                 if (r == NULL) {
 235                         free(p);
 236                         return -1;
 237                 }
 238
 239                 archive_read_support_format_all(r);
 240                 archive_read_support_filter_all(r);
 241
 242                 ret = archive_read_open_memory(r, p, resource_size(res));
 243                 if (ret != ARCHIVE_OK) {
 244                         fprintf(stderr, "Failed: %s\n",
 245                                         archive_error_string(r));
 246                         goto fail;
 247                 }
 248
 249                 try_again = 0;
 250
 251                 while (1) {
 252                         ret = archive_read_next_header(r, &e);
 253                         if (ret == ARCHIVE_EOF)
 254                                 break;
 255                         if (ret != ARCHIVE_OK)
 256                                 goto fail;
 257
 258                         ret = remove(archive_entry_pathname(e));
 259                         if (ret < 0) {
 260                                 switch (errno) {
 261                                 case ENOTEMPTY:
 262                                 case EEXIST:
 263                                         try_again = 1;
 264                                         break;
 265
 266                                 /* should not usually happen: */
 267                                 case ENOENT:
 268                                 case ENOTDIR:
 269                                 case EROFS:
 270                                         attempts += 1;
 271                                         continue;
 272                                 default:
 273                                         perror("Failed to remove file");
 274                                         goto fail;
 275                                 }
 276                         }
 277                 }
 278
 279                 archive_read_free(r);
 280                 attempts += 1;
 281         }
 282
 283         if (attempts >= 10000) {
 284                 fprintf(stderr, "Failed to remove archive\n");
 285                 free(p);
 286                 return -1;
 287         }
 288
 289         free(p);
 290         return 0;
 291
 292 fail:
 293         archive_read_free(r);
 294         free(p);
 295
 296         rte_panic("Failed: %s\n", archive_error_string(r));
 297         return -1;
 298 }
 299
 300 #endif /* RTE_APP_TEST_RESOURCE_TAR */
 301
 302 void resource_register(struct resource *r)
 303 {
 304         TAILQ_INSERT_TAIL(&resource_list, r, next);
 305 }