+ data.ioc_dev = cur_device;
+ data.ioc_inlbuf1 = logname;
+ data.ioc_inllen1 = strlen(logname) + 1;
+
+ /*
+ * Estimate about 128 characters per configuration record. Not all
+ * records will be printed in any case, so they should easily fit. If
+ * not, the kernel will return -EOVERFLOW and ask for fewer records.
+ *
+ * We don't want to request records from the kernel one-at-a-time, as
+ * it restarts the config llog iteration from the beginning, so we
+ * fetch multiple records from the kernel per call and split locally.
+ */
+ for (rec = start; rec < end; rec += inc) {
+ char *record = ((struct obd_ioctl_data *)buf)->ioc_bulk;
+ char *ptr;
+
+retry:
+ snprintf(startbuf, sizeof(startbuf), "%lu", rec);
+ snprintf(endbuf, sizeof(endbuf), "%lu",
+ end < rec + inc - 1 ? end : rec + inc - 1);
+
+ /* start and end record numbers are passed as ASCII digits */
+ data.ioc_inlbuf2 = startbuf;
+ data.ioc_inllen2 = strlen(startbuf) + 1;
+ data.ioc_inlbuf3 = endbuf;
+ data.ioc_inllen3 = strlen(endbuf) + 1;
+
+ data.ioc_inllen4 = sizeof(rawbuf) -
+ __ALIGN_KERNEL(sizeof(data), 8) -
+ __ALIGN_KERNEL(data.ioc_inllen1, 8) -
+ __ALIGN_KERNEL(data.ioc_inllen2, 8) -
+ __ALIGN_KERNEL(data.ioc_inllen3, 8);
+ memset(buf, 0, sizeof(rawbuf));
+ rc = llapi_ioctl_pack(&data, &buf, sizeof(rawbuf));
+ if (rc) {
+ fprintf(stderr, "%s: invalid ioctl data\n", logname);
+ goto out;
+ }
+
+ rc = l_ioctl(OBD_DEV_ID, OBD_IOC_LLOG_PRINT, buf);
+ if (rc == -EOVERFLOW && inc > 2) {
+ inc /= 2;
+ goto retry;
+ }
+ if (rc) {
+ fprintf(stderr, "%s: OBD_IOC_LLOG_PRINT failed: %s\n",
+ logname, strerror(errno));
+ rc = -errno;
+ goto out;
+ }
+
+ /* There is no "end of list" marker, record was not modified */
+ if (strcmp(record, logname) == 0)
+ break;
+
+ do {
+ ptr = strchr(record, '\n');
+ if (ptr)
+ *ptr = '\0';
+ rc = record_cb(record, private);
+ if (rc) {
+ if (rc > 0)
+ rc = 0;
+ goto out;
+ }
+
+ if (ptr)
+ record = ptr + 1;
+ } while (ptr && *(ptr + 1));
+ }
+
+out:
+ return rc;
+}
+
+static int llog_parse_catalog_start_end(int *argc, char **argv[],
+ char **catalog, long *start, long *end)
+{
+ const struct option long_opts[] = {
+ /* the --catalog option is not required, just for consistency */
+ { .val = 'c', .name = "catalog", .has_arg = required_argument },
+ { .val = 'e', .name = "end", .has_arg = required_argument },
+ { .val = 'h', .name = "help", .has_arg = no_argument },
+ { .val = 's', .name = "start", .has_arg = required_argument },
+ { .name = NULL } };
+ char *cmd = (*argv)[0];
+ char *endp;
+ int c;
+
+ if (catalog == NULL || start == NULL || end == NULL)
+ return -EINVAL;
+
+ /* now process command line arguments*/
+ while ((c = getopt_long(*argc, *argv, "c:e:hs:",
+ long_opts, NULL)) != -1) {
+ switch (c) {
+ case 'c':
+ *catalog = optarg;
+ break;
+ case 'e':
+ *end = strtol(optarg, &endp, 0);
+ if (*endp != '\0') {
+ fprintf(stderr, "%s: bad end value '%s'\n",
+ cmd, optarg);
+ return CMD_HELP;
+ }
+ break;
+ case 's':
+ *start = strtol(optarg, &endp, 0);
+ if (*endp != '\0') {
+ fprintf(stderr, "%s: bad start value '%s'\n",
+ cmd, optarg);
+ return CMD_HELP;
+ }
+ break;
+ case 'h':
+ default:
+ return CMD_HELP;
+ }
+ }
+ *argc -= optind;
+ *argv += optind;
+
+ /* support old optional positional parameters only if they were
+ * not already specified with named arguments: logname [start [end]]
+ */
+ if (*argc >= 1) {
+ if (*catalog) {
+ fprintf(stderr,
+ "%s: catalog is set, unknown argument '%s'\n",
+ cmd, (*argv)[0]);
+ return CMD_HELP;
+ }
+ *catalog = (*argv)[0];
+ (*argc)--;
+ (*argv)++;
+ }
+
+ if (*argc >= 1) {
+ if (*start != 1) {
+ fprintf(stderr,
+ "%s: --start is set, unknown argument '%s'\n",
+ cmd, (*argv)[0]);
+ return CMD_HELP;
+ }
+
+ *start = strtol((*argv)[0], &endp, 0);
+ if (*endp != '\0') {
+ fprintf(stderr, "%s: bad start value '%s'\n",
+ cmd, (*argv)[0]);
+ return CMD_HELP;
+ }
+ (*argc)--;
+ (*argv)++;
+ }
+ if (*argc >= 1) {
+ if (*end != -1) {
+ fprintf(stderr,
+ "%s: --end is set, unknown argument '%s'\n",
+ cmd, (*argv)[0]);
+ return CMD_HELP;
+ }
+
+ *end = strtol((*argv)[0], &endp, 0);
+ if (*endp != '\0') {
+ fprintf(stderr, "%s: bad end value '%s'\n",
+ cmd, (*argv)[0]);
+ return CMD_HELP;
+ }
+ (*argc)--;
+ (*argv)++;
+ }
+ if (*argc > 1) {
+ fprintf(stderr, "%s: unknown argument '%s'\n", cmd, (*argv)[0]);
+ return CMD_HELP;
+ }
+
+ if (*end != -1 && *end < *start) {
+ fprintf(stderr, "%s: end '%lu' less than than start '%lu'\n",
+ cmd, *end, *start);
+ return CMD_HELP;
+ }
+
+ return 0;
+}
+
+int jt_llog_print(int argc, char **argv)
+{
+ char *catalog = NULL;
+ long start = 1, end = -1;
+ int rc;
+
+ rc = llog_parse_catalog_start_end(&argc, &argv, &catalog, &start, &end);
+ if (rc)
+ return rc;
+
+ rc = jt_llog_print_iter(catalog, start, end, jt_llog_print_cb, NULL);
+
+ return rc;
git://git.whamcloud.com / fs / lustre-release.git / commitdiff