vol_id: add --offset option
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parent
573bdd7e75
commit
8b5238670d
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@ -13,7 +13,7 @@ INSTALL_DATA = ${INSTALL} -m 644
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INSTALL_LIB = ${INSTALL} -m 755
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SHLIB_CUR = 0
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SHLIB_REV = 82
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SHLIB_REV = 83
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SHLIB_AGE = 0
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SHLIB = libvolume_id.so.$(SHLIB_CUR).$(SHLIB_REV).$(SHLIB_AGE)
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@ -331,9 +331,9 @@ err:
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}
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/* run only once into a timeout for unreadable devices */
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static int device_is_readable(struct volume_id *id)
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static int device_is_readable(struct volume_id *id, uint64_t off)
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{
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if (volume_id_get_buffer(id, 0x00, 0x200) != NULL)
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if (volume_id_get_buffer(id, off, 0x200) != NULL)
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return 1;
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return 0;
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}
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@ -355,7 +355,7 @@ int volume_id_probe_raid(struct volume_id *id, uint64_t off, uint64_t size)
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if (id == NULL)
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return -EINVAL;
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if (!device_is_readable(id))
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if (!device_is_readable(id, off))
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return -1;
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info("probing at offset 0x%llx, size 0x%llx",
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@ -389,7 +389,7 @@ int volume_id_probe_filesystem(struct volume_id *id, uint64_t off, uint64_t size
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if (id == NULL)
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return -EINVAL;
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if (!device_is_readable(id))
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if (!device_is_readable(id, off))
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return -1;
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info("probing at offset 0x%llx, size 0x%llx",
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@ -421,7 +421,7 @@ int volume_id_probe_all(struct volume_id *id, uint64_t off, uint64_t size)
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if (id == NULL)
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return -EINVAL;
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if (!device_is_readable(id))
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if (!device_is_readable(id, off))
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return -1;
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/* probe for raid first, because fs probes may be successful on raid members */
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@ -134,6 +134,7 @@ int main(int argc, char *argv[])
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{ "export", 0, NULL, 'x' },
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{ "skip-raid", 0, NULL, 's' },
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{ "probe-all", 0, NULL, 'a' },
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{ "offset", 1, NULL, 'o' },
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{ "help", 0, NULL, 'h' },
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{}
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};
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@ -153,6 +154,7 @@ int main(int argc, char *argv[])
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uint64_t size;
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int skip_raid = 0;
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int probe_all = 0;
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uint64_t offset = 0;
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const char *node;
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int fd;
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const char *label, *uuid, *type, *type_version, *usage;
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@ -167,7 +169,7 @@ int main(int argc, char *argv[])
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while (1) {
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int option;
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option = getopt_long(argc, argv, "lLutxsah", options, NULL);
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option = getopt_long(argc, argv, "lLutxsaoh", options, NULL);
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if (option == -1)
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break;
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@ -193,6 +195,9 @@ int main(int argc, char *argv[])
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case 'a':
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probe_all = 1;
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break;
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case 'o':
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offset = strtoull(optarg, NULL, 0);
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break;
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case 'h':
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printf("Usage: vol_id [options] <device>\n"
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" --export export key/value pairs\n"
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@ -202,6 +207,7 @@ int main(int argc, char *argv[])
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" --uuid filesystem uuid\n"
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" --skip-raid don't probe for raid\n"
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" --probe-all find possibly conflicting signatures\n"
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" --offset skip given number of bytes of input\n"
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" --help\n\n");
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goto exit;
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default:
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@ -249,14 +255,14 @@ int main(int argc, char *argv[])
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}
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if (probe_all) {
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volume_id_all_probers(all_probers, vid, 0, size, NULL);
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volume_id_all_probers(all_probers, vid, offset, size, NULL);
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goto exit;
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}
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if (skip_raid)
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retval = volume_id_probe_filesystem(vid, 0, size);
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retval = volume_id_probe_filesystem(vid, offset, size);
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else
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retval = volume_id_probe_all(vid, 0, size);
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retval = volume_id_probe_all(vid, offset, size);
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if (retval != 0) {
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fprintf(stderr, "%s: unknown volume type\n", node);
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rc = 4;
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