diff options
Diffstat (limited to 'lib/device/parse_vpd.c')
| -rw-r--r-- | lib/device/parse_vpd.c | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/lib/device/parse_vpd.c b/lib/device/parse_vpd.c new file mode 100644 index 000000000..4bafa7b9e --- /dev/null +++ b/lib/device/parse_vpd.c @@ -0,0 +1,199 @@ +/* + * Copyright (C) 2022 Red Hat, Inc. All rights reserved. + * + * This file is part of LVM2. + * + * This copyrighted material is made available to anyone wishing to use, + * modify, copy, or redistribute it subject to the terms and conditions + * of the GNU Lesser General Public License v.2.1. + * + * You should have received a copy of the GNU Lesser General Public License + * along with this program; if not, write to the Free Software Foundation, + * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include "base/memory/zalloc.h" +#include "lib/misc/lib.h" +#include "lib/device/device.h" + +#include <stdio.h> +#include <unistd.h> +#include <stdint.h> +#include <stdlib.h> +#include <stdarg.h> +#include <string.h> +#include <inttypes.h> +#include <sys/types.h> +#include <sys/ioctl.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <ctype.h> +#include <limits.h> +#include <dirent.h> +#include <errno.h> +#include <stdbool.h> +#include <assert.h> + +/* + * Replace series of spaces with a single _. + */ +int format_t10_id(const unsigned char *in, int in_bytes, unsigned char *out, int out_bytes) +{ + int in_space = 0; + int retlen = 0; + int j = 0; + int i; + + for (i = 0; i < in_bytes; i++) { + if (!in[i]) + break; + if (j >= (out_bytes - 2)) + break; + /* skip leading spaces */ + if (!retlen && (in[i] == ' ')) + continue; + /* replace one or more spaces with _ */ + if (in[i] == ' ') { + in_space = 1; + continue; + } + /* spaces are finished so insert _ */ + if (in_space) { + out[j++] = '_'; + in_space = 0; + retlen++; + } + out[j++] = in[i]; + retlen++; + } + return retlen; +} + +static int _to_hex(const unsigned char *in, int in_bytes, unsigned char *out, int out_bytes) +{ + int off = 0; + int num; + int i; + + for (i = 0; i < in_bytes; i++) { + num = sprintf((char *)out + off, "%02x", in[i]); + if (num < 0) + break; + off += num; + if (off + 2 >= out_bytes) + break; + } + return off; +} + +#define ID_BUFSIZE 1024 + +/* + * based on linux kernel function + */ +int parse_vpd_ids(const unsigned char *vpd_data, int vpd_datalen, struct dm_list *ids) +{ + char id[ID_BUFSIZE]; + unsigned char tmp_str[ID_BUFSIZE]; + const unsigned char *d, *cur_id_str; + size_t id_len = ID_BUFSIZE; + int id_size = -1; + uint8_t cur_id_size = 0; + + memset(id, 0, ID_BUFSIZE); + for (d = vpd_data + 4; + d < vpd_data + vpd_datalen; + d += d[3] + 4) { + memset(tmp_str, 0, sizeof(tmp_str)); + + switch (d[1] & 0xf) { + case 0x1: + /* T10 Vendor ID */ + cur_id_size = d[3]; + if (cur_id_size + 4 > id_len) + cur_id_size = id_len - 4; + cur_id_str = d + 4; + format_t10_id(cur_id_str, cur_id_size, tmp_str, sizeof(tmp_str)); + id_size = snprintf(id, ID_BUFSIZE, "t10.%s", tmp_str); + if (id_size < 0) + break; + if (id_size >= ID_BUFSIZE) + id_size = ID_BUFSIZE - 1; + add_wwid(id, 1, ids); + break; + case 0x2: + /* EUI-64 */ + cur_id_size = d[3]; + cur_id_str = d + 4; + switch (cur_id_size) { + case 8: + _to_hex(cur_id_str, 8, tmp_str, sizeof(tmp_str)); + id_size = snprintf(id, ID_BUFSIZE, "eui.%s", tmp_str); + break; + case 12: + _to_hex(cur_id_str, 12, tmp_str, sizeof(tmp_str)); + id_size = snprintf(id, ID_BUFSIZE, "eui.%s", tmp_str); + break; + case 16: + _to_hex(cur_id_str, 16, tmp_str, sizeof(tmp_str)); + id_size = snprintf(id, ID_BUFSIZE, "eui.%s", tmp_str); + break; + default: + break; + } + if (id_size < 0) + break; + if (id_size >= ID_BUFSIZE) + id_size = ID_BUFSIZE - 1; + add_wwid(id, 2, ids); + break; + case 0x3: + /* NAA */ + cur_id_size = d[3]; + cur_id_str = d + 4; + switch (cur_id_size) { + case 8: + _to_hex(cur_id_str, 8, tmp_str, sizeof(tmp_str)); + id_size = snprintf(id, ID_BUFSIZE, "naa.%s", tmp_str); + break; + case 16: + _to_hex(cur_id_str, 16, tmp_str, sizeof(tmp_str)); + id_size = snprintf(id, ID_BUFSIZE, "naa.%s", tmp_str); + break; + default: + break; + } + if (id_size < 0) + break; + if (id_size >= ID_BUFSIZE) + id_size = ID_BUFSIZE - 1; + add_wwid(id, 3, ids); + break; + case 0x8: + /* SCSI name string */ + cur_id_size = d[3]; + cur_id_str = d + 4; + if (cur_id_size >= id_len) + cur_id_size = id_len - 1; + memcpy(id, cur_id_str, cur_id_size); + id_size = cur_id_size; + + /* + * Not in the kernel version, copying multipath code, + * which checks if this string begins with naa or eui + * and if so does tolower() on the chars. + */ + if (!strncmp(id, "naa.", 4) || !strncmp(id, "eui.", 4)) { + int i; + for (i = 0; i < id_size; i++) + id[i] = tolower(id[i]); + } + add_wwid(id, 8, ids); + break; + default: + break; + } + } + + return id_size; +} |