| /* |
| * sg_rdac |
| * |
| * Retrieve / set RDAC options. |
| * |
| * Copyright (C) 2006-2015 Hannes Reinecke <hare@suse.de> |
| * |
| * Based on sg_modes.c and sg_emc_trespass.c; credits from there apply. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2, or (at your option) |
| * any later version. |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| #include <string.h> |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| #include "sg_lib.h" |
| #include "sg_cmds_basic.h" |
| #include "sg_unaligned.h" |
| #include "sg_pr2serr.h" |
| |
| |
| static const char * version_str = "1.10 20151219"; |
| |
| unsigned char mode6_hdr[] = { |
| 0x75, /* Length */ |
| 0, /* medium */ |
| 0, /* params */ |
| 8, /* Block descriptor length */ |
| }; |
| |
| unsigned char mode10_hdr[] = { |
| 0x01, 0x18, /* Length */ |
| 0, /* medium */ |
| 0, /* params */ |
| 0, 0, /* reserved */ |
| 0, 0, /* block descriptor length */ |
| }; |
| |
| unsigned char block_descriptor[] = { |
| 0, /* Density code */ |
| 0, 0, 0, /* Number of blocks */ |
| 0, /* Reserved */ |
| 0, 0x02, 0, /* 512 byte blocks */ |
| }; |
| |
| struct rdac_page_common { |
| unsigned char current_serial[16]; |
| unsigned char alternate_serial[16]; |
| unsigned char current_mode_msb; |
| unsigned char current_mode_lsb; |
| unsigned char alternate_mode_msb; |
| unsigned char alternate_mode_lsb; |
| unsigned char quiescence; |
| unsigned char options; |
| }; |
| |
| struct rdac_legacy_page { |
| unsigned char page_code; |
| unsigned char page_length; |
| struct rdac_page_common attr; |
| unsigned char lun_table[32]; |
| unsigned char lun_table_exp[32]; |
| unsigned short reserved; |
| }; |
| |
| struct rdac_expanded_page { |
| unsigned char page_code; |
| unsigned char subpage_code; |
| unsigned char page_length[2]; |
| struct rdac_page_common attr; |
| unsigned char lun_table[256]; |
| unsigned char reserved[2]; |
| }; |
| |
| static int do_verbose = 0; |
| |
| static void dump_mode_page( unsigned char *page, int len ) |
| { |
| int i, k; |
| |
| for (k = 0; k < len; k += 16) { |
| |
| printf("%x:",k / 16); |
| for (i = 0; i < 16; i++) { |
| printf(" %02x", page[k + i]); |
| if (k + i >= len) { |
| printf("\n"); |
| break; |
| } |
| } |
| printf("\n"); |
| } |
| |
| } |
| |
| #define MX_ALLOC_LEN (1024 * 4) |
| #define RDAC_CONTROLLER_PAGE 0x2c |
| #define RDAC_CONTROLLER_PAGE_LEN 0x68 |
| #define LEGACY_PAGE 0x00 |
| #define EXPANDED_LUN_SPACE_PAGE 0x01 |
| #define EXPANDED_LUN_SPACE_PAGE_LEN 0x128 |
| #define RDAC_FAIL_ALL_PATHS 0x1 |
| #define RDAC_FAIL_SELECTED_PATHS 0x2 |
| #define RDAC_FORCE_QUIESCENCE 0x2 |
| #define RDAC_QUIESCENCE_TIME 10 |
| |
| static int fail_all_paths(int fd, int use_6_byte) |
| { |
| unsigned char fail_paths_pg[308]; |
| struct rdac_legacy_page *rdac_page; |
| struct rdac_expanded_page *rdac_page_exp; |
| struct rdac_page_common *rdac_common = NULL; |
| |
| int res; |
| char b[80]; |
| |
| memset(fail_paths_pg, 0, 308); |
| if (use_6_byte) { |
| memcpy(fail_paths_pg, mode6_hdr, 4); |
| memcpy(fail_paths_pg + 4, block_descriptor, 8); |
| rdac_page = (struct rdac_legacy_page *)(fail_paths_pg + 4 + 8); |
| rdac_page->page_code = RDAC_CONTROLLER_PAGE; |
| rdac_page->page_length = RDAC_CONTROLLER_PAGE_LEN; |
| rdac_common = &rdac_page->attr; |
| } else { |
| memcpy(fail_paths_pg, mode10_hdr, 8); |
| rdac_page_exp = (struct rdac_expanded_page *) |
| (fail_paths_pg + 8); |
| rdac_page_exp->page_code = RDAC_CONTROLLER_PAGE | 0x40; |
| rdac_page_exp->subpage_code = 0x1; |
| sg_put_unaligned_be16(EXPANDED_LUN_SPACE_PAGE_LEN, |
| rdac_page_exp->page_length + 0); |
| rdac_common = &rdac_page_exp->attr; |
| } |
| |
| rdac_common->current_mode_lsb = RDAC_FAIL_ALL_PATHS; |
| rdac_common->quiescence = RDAC_QUIESCENCE_TIME; |
| rdac_common->options = RDAC_FORCE_QUIESCENCE; |
| |
| if (use_6_byte) { |
| res = sg_ll_mode_select6(fd, 1 /* pf */, 0 /* sp */, |
| fail_paths_pg, 118, |
| 1, (do_verbose ? 2 : 0)); |
| } else { |
| res = sg_ll_mode_select10(fd, 1 /* pf */, 0 /* sp */, |
| fail_paths_pg, 308, |
| 1, (do_verbose ? 2: 0)); |
| } |
| |
| switch (res) { |
| case 0: |
| if (do_verbose) |
| pr2serr("fail paths successful\n"); |
| break; |
| default: |
| sg_get_category_sense_str(res, sizeof(b), b, do_verbose); |
| pr2serr("fail paths failed: %s\n", b); |
| break; |
| } |
| |
| return res; |
| } |
| |
| static int fail_this_path(int fd, int lun, int use_6_byte) |
| { |
| unsigned char fail_paths_pg[308]; |
| struct rdac_legacy_page *rdac_page; |
| struct rdac_expanded_page *rdac_page_exp; |
| struct rdac_page_common *rdac_common = NULL; |
| int res; |
| char b[80]; |
| |
| if (use_6_byte && lun > 32) { |
| pr2serr("must use 10 byte cdb to fail luns over 32\n"); |
| return -1; |
| } |
| |
| memset(fail_paths_pg, 0, 308); |
| if (use_6_byte) { |
| memcpy(fail_paths_pg, mode6_hdr, 4); |
| memcpy(fail_paths_pg + 4, block_descriptor, 8); |
| rdac_page = (struct rdac_legacy_page *)(fail_paths_pg + 4 + 8); |
| rdac_page->page_code = RDAC_CONTROLLER_PAGE; |
| rdac_page->page_length = RDAC_CONTROLLER_PAGE_LEN; |
| rdac_common = &rdac_page->attr; |
| memset(rdac_page->lun_table, 0x0, 32); |
| rdac_page->lun_table[lun] = 0x81; |
| } else { |
| memcpy(fail_paths_pg, mode10_hdr, 8); |
| rdac_page_exp = (struct rdac_expanded_page *) |
| (fail_paths_pg + 8); |
| rdac_page_exp->page_code = RDAC_CONTROLLER_PAGE | 0x40; |
| rdac_page_exp->subpage_code = 0x1; |
| sg_put_unaligned_be16(EXPANDED_LUN_SPACE_PAGE_LEN, |
| rdac_page_exp->page_length + 0); |
| rdac_common = &rdac_page_exp->attr; |
| memset(rdac_page_exp->lun_table, 0x0, 256); |
| rdac_page_exp->lun_table[lun] = 0x81; |
| } |
| |
| rdac_common->current_mode_lsb = RDAC_FAIL_SELECTED_PATHS; |
| rdac_common->quiescence = RDAC_QUIESCENCE_TIME; |
| rdac_common->options = RDAC_FORCE_QUIESCENCE; |
| |
| if (use_6_byte) { |
| res = sg_ll_mode_select6(fd, 1 /* pf */, 0 /* sp */, |
| fail_paths_pg, 118, |
| 1, (do_verbose ? 2 : 0)); |
| } else { |
| res = sg_ll_mode_select10(fd, 1 /* pf */, 0 /* sp */, |
| fail_paths_pg, 308, |
| 1, (do_verbose ? 2: 0)); |
| } |
| |
| switch (res) { |
| case 0: |
| if (do_verbose) |
| pr2serr("fail paths successful\n"); |
| break; |
| default: |
| sg_get_category_sense_str(res, sizeof(b), b, do_verbose); |
| pr2serr("fail paths page (lun=%d) failed: %s\n", lun, b); |
| break; |
| } |
| |
| return res; |
| } |
| |
| static void print_rdac_mode( unsigned char *ptr, int subpg) |
| { |
| struct rdac_legacy_page *legacy; |
| struct rdac_expanded_page *expanded; |
| struct rdac_page_common *rdac_ptr = NULL; |
| unsigned char * lun_table = NULL; |
| int i, k, bd_len, lun_table_len; |
| |
| if (subpg == 1) { |
| bd_len = ptr[7]; |
| expanded = (struct rdac_expanded_page *)(ptr + 8 + bd_len); |
| rdac_ptr = &expanded->attr; |
| lun_table = expanded->lun_table; |
| lun_table_len = 256; |
| } else { |
| bd_len = ptr[3]; |
| legacy = (struct rdac_legacy_page *)(ptr + 4 + bd_len); |
| rdac_ptr = &legacy->attr; |
| lun_table = legacy->lun_table; |
| lun_table_len = 32; |
| } |
| |
| printf("RDAC %s page\n", (subpg == 1) ? "Expanded" : "Legacy"); |
| printf(" Controller serial: %s\n", |
| rdac_ptr->current_serial); |
| printf(" Alternate controller serial: %s\n", |
| rdac_ptr->alternate_serial); |
| printf(" RDAC mode (redundant processor): "); |
| switch (rdac_ptr->current_mode_msb) { |
| case 0x00: |
| printf("alternate controller not present; "); |
| break; |
| case 0x01: |
| printf("alternate controller present; "); |
| break; |
| default: |
| printf("(Unknown controller status 0x%x); ", |
| rdac_ptr->current_mode_msb); |
| break; |
| } |
| switch (rdac_ptr->current_mode_lsb) { |
| case 0x0: |
| printf("inactive\n"); |
| break; |
| case 0x1: |
| printf("active\n"); |
| break; |
| case 0x2: |
| printf("Dual active mode\n"); |
| break; |
| default: |
| printf("(Unknown mode 0x%x)\n", |
| rdac_ptr->current_mode_lsb); |
| } |
| |
| printf(" RDAC mode (alternate processor): "); |
| switch (rdac_ptr->alternate_mode_msb) { |
| case 0x00: |
| printf("alternate controller not present; "); |
| break; |
| case 0x01: |
| printf("alternate controller present; "); |
| break; |
| default: |
| printf("(Unknown status 0x%x); ", |
| rdac_ptr->alternate_mode_msb); |
| break; |
| } |
| switch (rdac_ptr->alternate_mode_lsb) { |
| case 0x0: |
| printf("inactive\n"); |
| break; |
| case 0x1: |
| printf("active\n"); |
| break; |
| case 0x2: |
| printf("Dual active mode\n"); |
| break; |
| case 0x3: |
| printf("Not present\n"); |
| break; |
| case 0x4: |
| printf("held in reset\n"); |
| break; |
| default: |
| printf("(Unknown mode 0x%x)\n", |
| rdac_ptr->alternate_mode_lsb); |
| } |
| printf(" Quiescence timeout: %d\n", rdac_ptr->quiescence); |
| printf(" RDAC option 0x%x\n", rdac_ptr->options); |
| printf(" ALUA: %s\n", (rdac_ptr->options & 0x4 ? "Enabled" : |
| "Disabled" )); |
| printf(" Force Quiescence: %s\n", (rdac_ptr->options & 0x2 ? |
| "Enabled" : "Disabled" )); |
| printf (" LUN Table: (p = preferred, a = alternate, u = utm lun)\n"); |
| printf(" 0 1 2 3 4 5 6 7 8 9 a b c d e f\n"); |
| for (k = 0; k < lun_table_len; k += 16) { |
| printf(" 0x%x:",k / 16); |
| for (i = 0; i < 16; i++) { |
| switch (lun_table[k + i]) { |
| case 0x0: |
| printf(" x"); |
| break; |
| case 0x1: |
| printf(" p"); |
| break; |
| case 0x2: |
| printf(" a"); |
| break; |
| case 0x3: |
| printf(" u"); |
| break; |
| default: |
| printf(" ?"); |
| break; |
| } |
| if (i == 7) { |
| printf(" "); |
| } |
| } |
| printf("\n"); |
| } |
| } |
| |
| static void usage() |
| { |
| printf("Usage: sg_rdac [-6] [-a] [-f=LUN] [-v] [-V] DEVICE\n" |
| " where:\n" |
| " -6 use 6 byte cdbs for mode sense/select\n" |
| " -a transfer all devices to the controller\n" |
| " serving DEVICE.\n" |
| " -f=LUN transfer the device at LUN to the\n" |
| " controller serving DEVICE\n" |
| " -v verbose\n" |
| " -V print version then exit\n\n" |
| " Display/Modify RDAC Redundant Controller Page 0x2c.\n" |
| " If [-a] or [-f] is not specified the current settings" |
| " are displayed.\n"); |
| } |
| |
| int main(int argc, char * argv[]) |
| { |
| unsigned char rsp_buff[MX_ALLOC_LEN]; |
| char **argptr; |
| char * file_name = 0; |
| int res, fd, k, lun = -1; |
| int fail_all = 0; |
| int fail_path = 0; |
| int ret = 0; |
| int use_6_byte = 0; |
| |
| if (argc < 2) { |
| usage (); |
| return SG_LIB_SYNTAX_ERROR; |
| } |
| |
| for (k = 1; k < argc; ++k) { |
| argptr = argv + k; |
| if (!strcmp (*argptr, "-v")) |
| ++do_verbose; |
| else if (!strncmp(*argptr, "-f=",3)) { |
| ++fail_path; |
| lun = strtoul(*argptr + 3, NULL, 0); |
| } |
| else if (!strcmp(*argptr, "-a")) { |
| ++fail_all; |
| } |
| else if (!strcmp(*argptr, "-6")) { |
| use_6_byte = 1; |
| } |
| else if (!strcmp(*argptr, "-V")) { |
| pr2serr("sg_rdac version: %s\n", version_str); |
| return 0; |
| } |
| else if (*argv[k] == '-') { |
| pr2serr("Unrecognized switch: %s\n", argv[k]); |
| file_name = 0; |
| break; |
| } |
| else if (0 == file_name) |
| file_name = argv[k]; |
| else { |
| pr2serr("too many arguments\n"); |
| file_name = 0; |
| break; |
| } |
| } |
| if (0 == file_name) { |
| usage(); |
| return SG_LIB_SYNTAX_ERROR; |
| } |
| |
| fd = sg_cmds_open_device(file_name, 0 /* rw */, do_verbose); |
| if (fd < 0) { |
| pr2serr("open error: %s: %s\n", file_name, safe_strerror(-fd)); |
| usage(); |
| return SG_LIB_FILE_ERROR; |
| } |
| |
| if (fail_all) { |
| res = fail_all_paths(fd, use_6_byte); |
| } else if (fail_path) { |
| res = fail_this_path(fd, lun, use_6_byte); |
| } else { |
| if (use_6_byte) |
| res = sg_ll_mode_sense6(fd, /* DBD */ 0, /* PC */0, |
| 0x2c, 0, rsp_buff, 252, |
| 1, do_verbose); |
| else |
| res = sg_ll_mode_sense10(fd, /* llbaa */ 0, |
| /* DBD */ 0, |
| /* page control */0, |
| 0x2c, 0x1, rsp_buff, 308, |
| 1, do_verbose); |
| |
| if (!res) { |
| if (do_verbose) |
| dump_mode_page(rsp_buff, rsp_buff[0]); |
| print_rdac_mode(rsp_buff, !use_6_byte); |
| } else { |
| if (SG_LIB_CAT_INVALID_OP == res) |
| pr2serr(">>>>>> try again without the '-6' " |
| "switch for a 10 byte MODE SENSE " |
| "command\n"); |
| else if (SG_LIB_CAT_ILLEGAL_REQ == res) |
| pr2serr("mode sense: invalid field in cdb " |
| "(perhaps subpages or page control " |
| "(PC) not supported)\n"); |
| else { |
| char b[80]; |
| |
| sg_get_category_sense_str(res, sizeof(b), b, |
| do_verbose); |
| pr2serr("mode sense failed: %s\n", b); |
| } |
| } |
| } |
| ret = res; |
| |
| res = sg_cmds_close_device(fd); |
| if (res < 0) { |
| pr2serr("close error: %s\n", safe_strerror(-res)); |
| if (0 == ret) |
| return SG_LIB_FILE_ERROR; |
| } |
| return (ret >= 0) ? ret : SG_LIB_CAT_OTHER; |
| } |
