geom_raid3.c revision 139295
112772Speter/*- 212772Speter * Copyright (c) 2004 Pawel Jakub Dawidek <pjd@FreeBSD.org> 312772Speter * All rights reserved. 412772Speter * 512772Speter * Redistribution and use in source and binary forms, with or without 612772Speter * modification, are permitted provided that the following conditions 712772Speter * are met: 812772Speter * 1. Redistributions of source code must retain the above copyright 912772Speter * notice, this list of conditions and the following disclaimer. 1012772Speter * 2. Redistributions in binary form must reproduce the above copyright 1112772Speter * notice, this list of conditions and the following disclaimer in the 1212772Speter * documentation and/or other materials provided with the distribution. 1312772Speter * 1412772Speter * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 1512772Speter * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1612772Speter * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1712772Speter * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 1812772Speter * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 1912772Speter * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2012772Speter * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2112772Speter * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2212772Speter * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2312772Speter * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2412772Speter * SUCH DAMAGE. 2512772Speter */ 2612772Speter 2712772Speter#include <sys/cdefs.h> 2812772Speter__FBSDID("$FreeBSD: head/sbin/geom/class/raid3/geom_raid3.c 139295 2004-12-25 19:17:47Z pjd $"); 2912772Speter 3012772Speter#include <sys/param.h> 3112772Speter#include <errno.h> 3229451Scharnier#include <paths.h> 3312772Speter#include <stdio.h> 3429451Scharnier#include <stdlib.h> 3529451Scharnier#include <stdint.h> 3650479Speter#include <string.h> 3712772Speter#include <strings.h> 3812772Speter#include <assert.h> 3912772Speter#include <libgeom.h> 4012772Speter#include <geom/raid3/g_raid3.h> 4112772Speter#include <core/geom.h> 4212772Speter#include <misc/subr.h> 4329451Scharnier 4429451Scharnier 4512772Speteruint32_t lib_version = G_LIB_VERSION; 4620458Sjoerguint32_t version = G_RAID3_VERSION; 4769004Simp 4812772Speterstatic void raid3_main(struct gctl_req *req, unsigned f); 4916073Sphkstatic void raid3_clear(struct gctl_req *req); 5012772Speterstatic void raid3_dump(struct gctl_req *req); 5137578Sbdestatic void raid3_label(struct gctl_req *req); 5237578Sbde 5337578Sbdestruct g_command class_commands[] = { 5437578Sbde { "clear", G_FLAG_VERBOSE, raid3_main, G_NULL_OPTS }, 55125935Sdes { "configure", G_FLAG_VERBOSE, NULL, 5637578Sbde { 5761640Speter { 'a', "autosync", NULL, G_TYPE_NONE }, 5861640Speter { 'd', "dynamic", NULL, G_TYPE_NONE }, 5961640Speter { 'h', "hardcode", NULL, G_TYPE_NONE }, 6061640Speter { 'n', "noautosync", NULL, G_TYPE_NONE }, 6120458Sjoerg { 'r', "round_robin", NULL, G_TYPE_NONE }, 6229451Scharnier { 'R', "noround_robin", NULL, G_TYPE_NONE }, 6361640Speter { 'w', "verify", NULL, G_TYPE_NONE }, 6412772Speter { 'W', "noverify", NULL, G_TYPE_NONE }, 6537578Sbde G_OPT_SENTINEL 6637578Sbde } 6712772Speter }, 6837578Sbde { "dump", 0, raid3_main, G_NULL_OPTS }, 6912772Speter { "insert", G_FLAG_VERBOSE, NULL, 7037578Sbde { 71110895Sru { 'h', "hardcode", NULL, G_TYPE_NONE }, 72159362Sdelphij { 'n', "number", NULL, G_TYPE_NUMBER }, 73205880Sru G_OPT_SENTINEL 74205880Sru } 7520458Sjoerg }, 76110895Sru { "label", G_FLAG_VERBOSE, raid3_main, 7712772Speter { 7812772Speter { 'h', "hardcode", NULL, G_TYPE_NONE }, 7937578Sbde { 'n', "noautosync", NULL, G_TYPE_NONE }, 80210144Simp { 'r', "round_robin", NULL, G_TYPE_NONE }, 8172000Speter { 'w', "verify", NULL, G_TYPE_NONE }, 82210144Simp G_OPT_SENTINEL 83210144Simp } 8472000Speter }, 8572000Speter { "rebuild", G_FLAG_VERBOSE, NULL, G_NULL_OPTS }, 86210144Simp { "remove", G_FLAG_VERBOSE, NULL, 87210144Simp { 8837578Sbde { 'n', "number", NULL, G_TYPE_NUMBER }, 8937578Sbde G_OPT_SENTINEL 90159362Sdelphij } 91205880Sru }, 92205880Sru { "stop", G_FLAG_VERBOSE, NULL, 9372684Speter { 9446021Speter { 'f', "force", NULL, G_TYPE_NONE }, 9537578Sbde G_OPT_SENTINEL 96110895Sru } 9737578Sbde }, 9812772Speter G_CMD_SENTINEL 99209969Snwhitehorn}; 100209969Snwhitehorn 101209969Snwhitehornstatic int verbose = 0; 102209969Snwhitehorn 103209969Snwhitehornvoid usage(const char *); 104209969Snwhitehornvoid 105209969Snwhitehornusage(const char *comm) 106209969Snwhitehorn{ 107209969Snwhitehorn fprintf(stderr, 108209969Snwhitehorn "usage: %s label [-hnrvw] name prov prov prov [prov [...]]\n" 109209969Snwhitehorn " %s clear [-v] prov [prov [...]]\n" 110209969Snwhitehorn " %s dump prov [prov [...]]\n" 111209969Snwhitehorn " %s configure [-adhnrRvwW] name\n" 112209969Snwhitehorn " %s rebuild [-v] name prov\n" 113206664Simp " %s insert [-hv] <-n number> name prov\n" 114206664Simp " %s remove [-v] <-n number> name\n" 115206664Simp " %s stop [-fv] name [...]\n", 116206664Simp comm, comm, comm, comm, comm, comm, comm, comm); 117210144Simp} 118206664Simp 119206664Simpstatic void 120206664Simpraid3_main(struct gctl_req *req, unsigned flags) 121206664Simp{ 122206664Simp const char *name; 123206664Simp 124110895Sru if ((flags & G_FLAG_VERBOSE) != 0) 12512772Speter verbose = 1; 126110895Sru 12771251Speter name = gctl_get_asciiparam(req, "verb"); 128210144Simp if (name == NULL) { 12972841Speter gctl_error(req, "No '%s' argument.", "verb"); 13061523Speter return; 13161523Speter } 13261523Speter if (strcmp(name, "label") == 0) 13312772Speter raid3_label(req); 13412772Speter else if (strcmp(name, "clear") == 0) 13512772Speter raid3_clear(req); 13612772Speter else if (strcmp(name, "dump") == 0) 13712772Speter raid3_dump(req); 13812772Speter else 13945744Speter gctl_error(req, "Unknown command: %s.", name); 14061640Speter} 14112772Speter 14272684Speterstatic void 14372684Speterraid3_label(struct gctl_req *req) 14448401Speter{ 145110895Sru struct g_raid3_metadata md; 146110895Sru u_char sector[512]; 14712772Speter const char *str; 14812772Speter char param[16]; 14912772Speter int *hardcode, *nargs, *noautosync, *round_robin, *verify; 15012772Speter int error, i; 15148401Speter unsigned sectorsize, ssize; 15212772Speter off_t mediasize, msize; 15312772Speter 15412772Speter nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 15512772Speter if (nargs == NULL) { 15612772Speter gctl_error(req, "No '%s' argument.", "nargs"); 15712772Speter return; 158110895Sru } 15912772Speter if (*nargs < 4) { 16037577Sbde gctl_error(req, "Too few arguments."); 16112772Speter return; 16237577Sbde } 16312772Speter#ifndef BITCOUNT 16437577Sbde#define BITCOUNT(x) (((BX_(x) + (BX_(x) >> 4)) & 0x0F0F0F0F) % 255) 165210144Simp#define BX_(x) ((x) - (((x) >> 1) & 0x77777777) - \ 16672841Speter (((x) >> 2) & 0x33333333) - (((x) >> 3) & 0x11111111)) 16772841Speter#endif 16837577Sbde if (BITCOUNT(*nargs - 2) != 1) { 16912772Speter gctl_error(req, "Invalid number of components."); 17012772Speter return; 17112772Speter } 17212772Speter 17371866Speter strlcpy(md.md_magic, G_RAID3_MAGIC, sizeof(md.md_magic)); 17412772Speter md.md_version = G_RAID3_VERSION; 17512772Speter str = gctl_get_asciiparam(req, "arg0"); 17612772Speter if (str == NULL) { 17729451Scharnier gctl_error(req, "No 'arg%u' argument.", 0); 17829451Scharnier return; 17912772Speter } 18012772Speter strlcpy(md.md_name, str, sizeof(md.md_name)); 18112772Speter md.md_all = *nargs - 1; 18212772Speter md.md_mflags = 0; 18312772Speter md.md_dflags = 0; 18412772Speter md.md_genid = 0; 185207263Simp md.md_syncid = 1; 18612772Speter md.md_sync_offset = 0; 18712772Speter noautosync = gctl_get_paraml(req, "noautosync", sizeof(*noautosync)); 18855659Sbde if (noautosync == NULL) { 189110895Sru gctl_error(req, "No '%s' argument.", "noautosync"); 19055659Sbde return; 19155659Sbde } 19255659Sbde if (*noautosync) 19355659Sbde md.md_mflags |= G_RAID3_DEVICE_FLAG_NOAUTOSYNC; 19412772Speter round_robin = gctl_get_paraml(req, "round_robin", sizeof(*round_robin)); 195110895Sru if (round_robin == NULL) { 19612772Speter gctl_error(req, "No '%s' argument.", "round_robin"); 19748401Speter return; 19812772Speter } 19912772Speter if (*round_robin) 20012772Speter md.md_mflags |= G_RAID3_DEVICE_FLAG_ROUND_ROBIN; 20112772Speter verify = gctl_get_paraml(req, "verify", sizeof(*verify)); 20212772Speter if (verify == NULL) { 20312772Speter gctl_error(req, "No '%s' argument.", "verify"); 20412772Speter return; 20512772Speter } 20612772Speter if (*verify) 20712772Speter md.md_mflags |= G_RAID3_DEVICE_FLAG_VERIFY; 20812772Speter if (*round_robin && *verify) { 20948401Speter gctl_error(req, "Both '%c' and '%c' options given.", 'r', 'w'); 21048401Speter return; 21112772Speter } 21212772Speter hardcode = gctl_get_paraml(req, "hardcode", sizeof(*hardcode)); 21312772Speter if (hardcode == NULL) { 21412772Speter gctl_error(req, "No '%s' argument.", "hardcode"); 21512772Speter return; 21612772Speter } 21712772Speter 21812772Speter /* 219110895Sru * Calculate sectorsize by finding least common multiple from 22048401Speter * sectorsizes of every disk and find the smallest mediasize. 22148401Speter */ 22255603Sbde mediasize = 0; 223210144Simp sectorsize = 0; 224210144Simp for (i = 1; i < *nargs; i++) { 225210144Simp snprintf(param, sizeof(param), "arg%u", i); 22648401Speter str = gctl_get_asciiparam(req, param); 22755659Sbde 228210144Simp msize = g_get_mediasize(str); 229210144Simp ssize = g_get_sectorsize(str); 230210144Simp if (msize == 0 || ssize == 0) { 23155659Sbde gctl_error(req, "Can't get informations about %s: %s.", 23248401Speter str, strerror(errno)); 233159362Sdelphij return; 234205880Sru } 235205880Sru msize -= ssize; 23648401Speter if (mediasize == 0 || (mediasize > 0 && msize < mediasize)) 23748401Speter mediasize = msize; 238110895Sru if (sectorsize == 0) 23948401Speter sectorsize = ssize; 24012772Speter else 24112772Speter sectorsize = g_lcm(sectorsize, ssize); 24212772Speter } 24312772Speter md.md_mediasize = mediasize * (*nargs - 2); 24412772Speter md.md_sectorsize = sectorsize * (*nargs - 2); 24512772Speter 246207263Simp /* 24748401Speter * Clear last sector first, to spoil all components if device exists. 24848401Speter */ 249110895Sru for (i = 1; i < *nargs; i++) { 250110895Sru snprintf(param, sizeof(param), "arg%u", i); 251110895Sru str = gctl_get_asciiparam(req, param); 25212772Speter 25312772Speter error = g_metadata_clear(str, NULL); 25412772Speter if (error != 0) { 25512772Speter gctl_error(req, "Can't store metadata on %s: %s.", str, 25612772Speter strerror(error)); 25712772Speter return; 25812772Speter } 25912772Speter } 26012772Speter 261159362Sdelphij /* 262205880Sru * Ok, store metadata (use disk number as priority). 263205880Sru */ 26412772Speter for (i = 1; i < *nargs; i++) { 26512772Speter snprintf(param, sizeof(param), "arg%u", i); 266110895Sru str = gctl_get_asciiparam(req, param); 26712772Speter 26812772Speter msize = g_get_mediasize(str) - g_get_sectorsize(str); 26912772Speter if (mediasize < msize) { 27029451Scharnier fprintf(stderr, 27129451Scharnier "warning: %s: only %jd bytes from %jd bytes used.\n", 272110895Sru str, (intmax_t)mediasize, (intmax_t)msize); 273110895Sru } 27412772Speter 27512772Speter md.md_no = i - 1; 27612772Speter if (!*hardcode) 27712772Speter bzero(md.md_provider, sizeof(md.md_provider)); 27812772Speter else { 279110895Sru if (strncmp(str, _PATH_DEV, strlen(_PATH_DEV)) == 0) 28012772Speter str += strlen(_PATH_DEV); 28112772Speter strlcpy(md.md_provider, str, sizeof(md.md_provider)); 28212772Speter } 28312772Speter if (*verify && md.md_no == md.md_all - 1) { 284207263Simp /* 28512772Speter * In "verify" mode, force synchronization of parity 28612772Speter * component on start. 28712772Speter */ 28812772Speter md.md_syncid = 0; 28912772Speter } 29045744Speter raid3_metadata_encode(&md, sector); 29161640Speter error = g_metadata_store(str, sector, sizeof(sector)); 29212772Speter if (error != 0) { 29369004Simp fprintf(stderr, "Can't store metadata on %s: %s.\n", 29469004Simp str, strerror(error)); 29512772Speter gctl_error(req, "Not fully done."); 29612772Speter continue; 29712772Speter } 298207263Simp if (verbose) 29912772Speter printf("Metadata value stored on %s.\n", str); 300110895Sru } 30112772Speter} 30269004Simp 30312772Speterstatic void 30412772Speterraid3_clear(struct gctl_req *req) 30512772Speter{ 30612772Speter const char *name; 307207263Simp char param[16]; 30812772Speter int *nargs, error, i; 30912772Speter 31012772Speter nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 311207263Simp if (nargs == NULL) { 31245744Speter gctl_error(req, "No '%s' argument.", "nargs"); 313207265Simp return; 31412772Speter } 315207263Simp if (*nargs < 1) { 316207263Simp gctl_error(req, "Too few arguments."); 317207265Simp return; 318207265Simp } 319210144Simp 320210144Simp for (i = 0; i < *nargs; i++) { 321207265Simp snprintf(param, sizeof(param), "arg%u", i); 322207265Simp name = gctl_get_asciiparam(req, param); 323207265Simp 324207265Simp error = g_metadata_clear(name, G_RAID3_MAGIC); 325207265Simp if (error != 0) { 326207265Simp fprintf(stderr, "Can't clear metadata on %s: %s.\n", 327207265Simp name, strerror(error)); 328207265Simp gctl_error(req, "Not fully done."); 329207265Simp continue; 330207265Simp } 331207265Simp if (verbose) 332207263Simp printf("Metadata cleared on %s.\n", name); 333207263Simp } 334207263Simp} 335207263Simp 336207263Simpstatic void 337207265Simpraid3_dump(struct gctl_req *req) 338207263Simp{ 339207263Simp struct g_raid3_metadata md, tmpmd; 340207263Simp const char *name; 341207263Simp char param[16]; 342207265Simp int *nargs, error, i; 343207263Simp 344207263Simp nargs = gctl_get_paraml(req, "nargs", sizeof(*nargs)); 345207263Simp if (nargs == NULL) { 346207263Simp gctl_error(req, "No '%s' argument.", "nargs"); 347207263Simp return; 348207265Simp } 349207265Simp if (*nargs < 1) { 350207265Simp gctl_error(req, "Too few arguments."); 351207265Simp return; 352207263Simp } 353207263Simp 354211325Simp for (i = 0; i < *nargs; i++) { 355211325Simp snprintf(param, sizeof(param), "arg%u", i); 356211325Simp name = gctl_get_asciiparam(req, param); 357211325Simp 358211325Simp error = g_metadata_read(name, (u_char *)&tmpmd, sizeof(tmpmd), 359207263Simp G_RAID3_MAGIC); 360207263Simp if (error != 0) { 361207263Simp fprintf(stderr, "Can't read metadata from %s: %s.\n", 362207263Simp name, strerror(error)); 363207263Simp gctl_error(req, "Not fully done."); 36412772Speter continue; 36512772Speter } 36669004Simp if (raid3_metadata_decode((u_char *)&tmpmd, &md) != 0) { 36712772Speter fprintf(stderr, "MD5 hash mismatch for %s, skipping.\n", 36812772Speter name); 369207263Simp gctl_error(req, "Not fully done."); 370207263Simp continue; 371207263Simp } 372207263Simp printf("Metadata on %s:\n", name); 373207263Simp raid3_metadata_dump(&md); 374207263Simp printf("\n"); 375207263Simp } 376207263Simp} 377207263Simp