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lib/device/parse_vpd.c
307 строк
7 KB
Zdenek Kabelac
lvm: indent updates
23 апр 2026, 13:07
23 апр 2026, 13:07
1e11ec1
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/* * 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/commands/toolcontext.h" #include "lib/device/device.h" #include "lib/device/device_id.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/stat.h> #include <fcntl.h> #include <ctype.h> #include <limits.h> #include <dirent.h> #include <errno.h> #include <stdbool.h> #include <assert.h> /* * Remove leading spaces. * Remove trailing spaces. * Replace each space with underscore. * Skip quotes, non-ascii, non-printable. */ int format_general_id(const char *in, size_t in_bytes, unsigned char *out, size_t out_bytes) { const char *end; size_t end_bytes = strlen(in); int retlen = 0; unsigned j = 0; unsigned i; if (!end_bytes) return 0; end = in + end_bytes - 1; while ((end > in) && (*end == ' ')) { end--; end_bytes--; } for (i = 0; i < end_bytes; i++) { if (!in[i]) break; if (j >= (out_bytes - 2)) break; /* skip leading spaces */ if (!retlen && (in[i] == ' ')) continue; /* skip non-ascii non-printable characters */ if (!isascii(in[i]) || !isprint(in[i])) continue; /* skip quote */ if (in[i] == '"') continue; /* replace each space with _ */ if (in[i] == ' ') out[j++] = '_'; else out[j++] = in[i]; retlen++; } return retlen; } /* * Remove leading spaces. * Remove trailing spaces. * Replace series of spaces with a single _. * Skip quotes, non-ascii, non-printable. */ int format_t10_id(const unsigned char *in, size_t in_bytes, unsigned char *out, size_t out_bytes) { int in_space = 0; int retlen = 0; unsigned j = 0; unsigned 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; /* skip non-ascii non-printable characters */ if (!isascii(in[i]) || !isprint(in[i])) continue; /* skip quote */ if (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; const unsigned char *vpd_end = vpd_data + vpd_datalen; int id_size = -1; int type; uint8_t cur_id_size = 0; for (d = vpd_data + 4; d + 4 <= vpd_end; d += d[3] + 4) { memset(id, 0, ID_BUFSIZE); memset(tmp_str, 0, sizeof(tmp_str)); switch (d[1] & 0xf) { case 0x1: /* T10 Vendor ID */ cur_id_size = d[3]; if (d + 4 + cur_id_size > vpd_end) cur_id_size = vpd_end - d - 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; dev_add_scsi_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; dev_add_scsi_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; dev_add_scsi_wwid(id, 3, ids); break; case 0x8: /* SCSI name string */ cur_id_size = d[3]; if (d + 4 + cur_id_size > vpd_end) cur_id_size = vpd_end - d - 4; cur_id_str = d + 4; memcpy(id, cur_id_str, cur_id_size); id_size = cur_id_size; /* * if naa or eui ids are provided as scsi names, * consider them to be naa/eui types. */ if (!memcmp(id, "eui.", 4)) type = 2; else if (!memcmp(id, "naa.", 4)) type = 3; else type = 8; /* * 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 ((type == 2) || (type == 3)) { unsigned i; for (i = 0; i < strlen(id); i++) id[i] = tolower(id[i]); } dev_add_scsi_wwid(id, type, ids); break; default: break; } } return id_size; } int parse_vpd_serial(const unsigned char *in, char *out, size_t outsize) { uint8_t len_buf[2] __attribute__((aligned(8))) = { 0 }; size_t len; /* parsing code from multipath tools */ /* ignore in[0] and in[1] */ /* len is in[2] and in[3] */ /* serial begins at in[4] */ len_buf[0] = in[2]; len_buf[1] = in[3]; len = len_buf[0] << 8 | len_buf[1]; if (outsize == 0) return 0; if (len > DEV_WWID_SIZE) len = DEV_WWID_SIZE; /* * Strip leading and trailing whitespace */ while (len > 0 && in[len + 3] == ' ') --len; while (len > 0 && in[4] == ' ') { ++in; --len; } if (len >= outsize) len = outsize - 1; if (len > 0) { memcpy(out, in + 4, len); out[len] = '\0'; } return len; }