Beispiel #1
0
/* from mdopen.c */
int open_mddev(char *dev, int report_errors/*unused*/)
{
	int mdfd = open(dev, O_RDWR);
	if (mdfd < 0)
		fprintf(stderr, Name ": error opening %s: %s\n",
			dev, strerror(errno));
	else if (md_get_version(mdfd) <= 0) {
		fprintf(stderr, Name ": %s does not appear to be an md device\n",
			dev);
		close(mdfd);
		mdfd = -1;
	}
	return mdfd;
}
Beispiel #2
0
int Build(char *mddev, struct mddev_dev *devlist,
	  struct shape *s, struct context *c)
{
	/* Build a linear or raid0 arrays without superblocks
	 * We cannot really do any checks, we just do it.
	 * For md_version < 0.90.0, we call REGISTER_DEV
	 * with the device numbers, and then
	 * START_MD giving the "geometry"
	 * geometry is 0xpp00cc
	 * where pp is personality: 1==linear, 2=raid0
	 * cc = chunk size factor: 0==4k, 1==8k etc.
	 *
	 * For md_version >= 0.90.0 we call
	 * SET_ARRAY_INFO,  ADD_NEW_DISK, RUN_ARRAY
	 *
	 */
	int i;
	int vers;
	struct stat stb;
	int subdevs = 0, missing_disks = 0;
	struct mddev_dev *dv;
	int bitmap_fd;
	unsigned long long bitmapsize;
	int mdfd;
	char chosen_name[1024];
	int uuid[4] = {0,0,0,0};
	struct map_ent *map = NULL;

	/* scan all devices, make sure they really are block devices */
	for (dv = devlist; dv; dv=dv->next) {
		subdevs++;
		if (strcmp("missing", dv->devname) == 0) {
			missing_disks++;
			continue;
		}
		if (stat(dv->devname, &stb)) {
			pr_err("Cannot find %s: %s\n",
				dv->devname, strerror(errno));
			return 1;
		}
		if ((stb.st_mode & S_IFMT) != S_IFBLK) {
			pr_err("%s is not a block device.\n",
				dv->devname);
			return 1;
		}
	}

	if (s->raiddisks != subdevs) {
		pr_err("requested %d devices in array but listed %d\n",
			s->raiddisks, subdevs);
		return 1;
	}

	if (s->layout == UnSet)
		switch(s->level) {
		default: /* no layout */
			s->layout = 0;
			break;
		case 10:
			s->layout = 0x102; /* near=2, far=1 */
			if (c->verbose > 0)
				pr_err("layout defaults to n1\n");
			break;
		case 5:
		case 6:
			s->layout = map_name(r5layout, "default");
			if (c->verbose > 0)
				pr_err("layout defaults to %s\n", map_num(r5layout, s->layout));
			break;
		case LEVEL_FAULTY:
			s->layout = map_name(faultylayout, "default");

			if (c->verbose > 0)
				pr_err("layout defaults to %s\n", map_num(faultylayout, s->layout));
			break;
		}

	/* We need to create the device.  It can have no name. */
	map_lock(&map);
	mdfd = create_mddev(mddev, NULL, c->autof, LOCAL,
			    chosen_name);
	if (mdfd < 0) {
		map_unlock(&map);
		return 1;
	}
	mddev = chosen_name;

	map_update(&map, fd2devnm(mdfd), "none", uuid, chosen_name);
	map_unlock(&map);

	vers = md_get_version(mdfd);

	/* looks Ok, go for it */
	if (vers >= 9000) {
		mdu_array_info_t array;
		array.level = s->level;
		if (s->size == MAX_SIZE)
			s->size = 0;
		array.size = s->size;
		array.nr_disks = s->raiddisks;
		array.raid_disks = s->raiddisks;
		array.md_minor = 0;
		if (fstat(mdfd, &stb)==0)
			array.md_minor = minor(stb.st_rdev);
		array.not_persistent = 1;
		array.state = 0; /* not clean, but no errors */
		if (s->assume_clean)
			array.state |= 1;
		array.active_disks = s->raiddisks - missing_disks;
		array.working_disks = s->raiddisks - missing_disks;
		array.spare_disks = 0;
		array.failed_disks = missing_disks;
		if (s->chunk == 0 && (s->level==0 || s->level==LEVEL_LINEAR))
			s->chunk = 64;
		array.chunk_size = s->chunk*1024;
		array.layout = s->layout;
		if (ioctl(mdfd, SET_ARRAY_INFO, &array)) {
			pr_err("SET_ARRAY_INFO failed for %s: %s\n",
				mddev, strerror(errno));
			goto abort;
		}
	} else if (s->bitmap_file) {
		pr_err("bitmaps not supported with this kernel\n");
		goto abort;
	}

	if (s->bitmap_file && strcmp(s->bitmap_file, "none") == 0)
		s->bitmap_file = NULL;
	if (s->bitmap_file && s->level <= 0) {
		pr_err("bitmaps not meaningful with level %s\n",
			map_num(pers, s->level)?:"given");
		goto abort;
	}
Beispiel #3
0
static int mdmon(char *devnm, int must_fork, int takeover)
{
	int mdfd;
	struct mdinfo *mdi, *di;
	struct supertype *container;
	sigset_t set;
	struct sigaction act;
	int pfd[2];
	int status;
	int ignore;
	pid_t victim = -1;
	int victim_sock = -1;

	dprintf("starting mdmon for %s\n", devnm);

	mdfd = open_dev(devnm);
	if (mdfd < 0) {
		pr_err("%s: %s\n", devnm, strerror(errno));
		return 1;
	}
	if (md_get_version(mdfd) < 0) {
		pr_err("%s: Not an md device\n", devnm);
		return 1;
	}

	/* Fork, and have the child tell us when they are ready */
	if (must_fork) {
		if (pipe(pfd) != 0) {
			pr_err("failed to create pipe\n");
			return 1;
		}
		switch(fork()) {
		case -1:
			pr_err("failed to fork: %s\n", strerror(errno));
			return 1;
		case 0: /* child */
			close(pfd[0]);
			break;
		default: /* parent */
			close(pfd[1]);
			if (read(pfd[0], &status, sizeof(status)) != sizeof(status)) {
				wait(&status);
				status = WEXITSTATUS(status);
			}
			close(pfd[0]);
			return status;
		}
	} else
		pfd[0] = pfd[1] = -1;

	container = xcalloc(1, sizeof(*container));
	strcpy(container->devnm, devnm);
	container->arrays = NULL;
	container->sock = -1;

	mdi = sysfs_read(mdfd, container->devnm, GET_VERSION|GET_LEVEL|GET_DEVS);

	if (!mdi) {
		pr_err("failed to load sysfs info for %s\n", container->devnm);
		exit(3);
	}
	if (mdi->array.level != UnSet) {
		pr_err("%s is not a container - cannot monitor\n", devnm);
		exit(3);
	}
	if (mdi->array.major_version != -1 ||
	    mdi->array.minor_version != -2) {
		pr_err("%s does not use external metadata - cannot monitor\n",
			devnm);
		exit(3);
	}

	container->ss = version_to_superswitch(mdi->text_version);
	if (container->ss == NULL) {
		pr_err("%s uses unsupported metadata: %s\n",
			devnm, mdi->text_version);
		exit(3);
	}

	container->devs = NULL;
	for (di = mdi->devs; di; di = di->next) {
		struct mdinfo *cd = xmalloc(sizeof(*cd));
		*cd = *di;
		cd->next = container->devs;
		container->devs = cd;
	}
	sysfs_free(mdi);

	/* SIGUSR is sent between parent and child.  So both block it
	 * and enable it only with pselect.
	 */
	sigemptyset(&set);
	sigaddset(&set, SIGUSR1);
	sigaddset(&set, SIGTERM);
	sigprocmask(SIG_BLOCK, &set, NULL);
	act.sa_handler = wake_me;
	act.sa_flags = 0;
	sigaction(SIGUSR1, &act, NULL);
	act.sa_handler = term;
	sigaction(SIGTERM, &act, NULL);
	act.sa_handler = SIG_IGN;
	sigaction(SIGPIPE, &act, NULL);

	victim = mdmon_pid(container->devnm);
	if (victim >= 0)
		victim_sock = connect_monitor(container->devnm);

	ignore = chdir("/");
	if (!takeover && victim > 0 && victim_sock >= 0) {
		if (fping_monitor(victim_sock) == 0) {
			pr_err("%s already managed\n", container->devnm);
			exit(3);
		}
		close(victim_sock);
		victim_sock = -1;
	}
	if (container->ss->load_container(container, mdfd, devnm)) {
		pr_err("Cannot load metadata for %s\n", devnm);
		exit(3);
	}
	close(mdfd);

	/* Ok, this is close enough.  We can say goodbye to our parent now.
	 */
	if (victim > 0)
		remove_pidfile(devnm);
	if (make_pidfile(devnm) < 0) {
		exit(3);
	}
	container->sock = make_control_sock(devnm);

	status = 0;
	if (pfd[1] >= 0) {
		if (write(pfd[1], &status, sizeof(status)) < 0)
			pr_err("failed to notify our parent: %d\n",
			       getppid());
		close(pfd[1]);
	}

	mlockall(MCL_CURRENT | MCL_FUTURE);

	if (clone_monitor(container) < 0) {
		pr_err("failed to start monitor process: %s\n",
			strerror(errno));
		exit(2);
	}

	if (victim > 0) {
		try_kill_monitor(victim, container->devnm, victim_sock);
		if (victim_sock >= 0)
			close(victim_sock);
	}

	setsid();
	close(0);
	open("/dev/null", O_RDWR);
	close(1);
	ignore = dup(0);
#ifndef DEBUG
	close(2);
	ignore = dup(0);
#endif

	/* This silliness is to stop the compiler complaining
	 * that we ignore 'ignore'
	 */
	if (ignore)
		ignore++;

	do_manager(container);

	exit(0);
}
Beispiel #4
0
int Assemble(struct supertype *st, char *mddev, int mdfd,
	     mddev_ident_t ident, char *conffile,
	     mddev_dev_t devlist,
	     int readonly, int runstop,
	     char *update,
	     int verbose, int force)
{
	/*
	 * The task of Assemble is to find a collection of
	 * devices that should (according to their superblocks)
	 * form an array, and to give this collection to the MD driver.
	 * In Linux-2.4 and later, this involves submitting a
	 * SET_ARRAY_INFO ioctl with no arg - to prepare
	 * the array - and then submit a number of
	 * ADD_NEW_DISK ioctls to add disks into
	 * the array.  Finally RUN_ARRAY might
	 * be submitted to start the array.
	 *
	 * Much of the work of Assemble is in finding and/or
	 * checking the disks to make sure they look right.
	 *
	 * If mddev is not set, then scan must be set and we
	 *  read through the config file for dev+uuid mapping
	 *  We recurse, setting mddev, for each device that
	 *    - isn't running
	 *    - has a valid uuid (or any uuid if !uuidset)
	 *
	 * If mddev is set, we try to determine state of md.
	 *   check version - must be at least 0.90.0
	 *   check kernel version.  must be at least 2.4.
	 *    If not, we can possibly fall back on START_ARRAY
	 *   Try to GET_ARRAY_INFO.
	 *     If possible, give up
	 *     If not, try to STOP_ARRAY just to make sure
	 *
	 * If !uuidset and scan, look in conf-file for uuid
	 *       If not found, give up
	 * If !devlist and scan and uuidset, get list of devs from conf-file 
	 *
	 * For each device:
	 *   Check superblock - discard if bad
	 *   Check uuid (set if we don't have one) - discard if no match
	 *   Check superblock similarity if we have a superblock - discard if different
	 *   Record events, devicenum
	 * This should give us a list of devices for the array
	 * We should collect the most recent event number
	 *
	 * Count disks with recent enough event count
	 * While force && !enough disks
	 *    Choose newest rejected disks, update event count
	 *     mark clean and rewrite superblock
	 * If recent kernel:
	 *    SET_ARRAY_INFO
	 *    foreach device with recent events : ADD_NEW_DISK
	 *    if runstop == 1 || "enough" disks and runstop==0 -> RUN_ARRAY
	 * If old kernel:
	 *    Check the device numbers in superblock are right
	 *    update superblock if any changes
	 *    START_ARRAY
	 *
	 */
	int old_linux = 0;
	int vers;
	void *first_super = NULL, *super = NULL;
	struct {
		char *devname;
		unsigned int major, minor;
		unsigned int oldmajor, oldminor;
		long long events;
		int uptodate;
		int state;
		int raid_disk;
		int disk_nr;
	} *devices;
	int *best = NULL; /* indexed by raid_disk */
	unsigned int bestcnt = 0;
	int devcnt = 0;
	unsigned int okcnt, sparecnt;
	unsigned int req_cnt;
	unsigned int i;
	int most_recent = 0;
	int chosen_drive;
	int change = 0;
	int inargv = 0;
	int start_partial_ok = force || devlist==NULL;
	unsigned int num_devs;
	mddev_dev_t tmpdev;
	struct mdinfo info;
	struct mddev_ident_s ident2;
	char *avail;
	int nextspare = 0;
	
	vers = md_get_version(mdfd);
	if (vers <= 0) {
		fprintf(stderr, Name ": %s appears not to be an md device.\n", mddev);
		return 1;
	}
	if (vers < 9000) {
		fprintf(stderr, Name ": Assemble requires driver version 0.90.0 or later.\n"
			"    Upgrade your kernel or try --build\n");
		return 1;
	}
	if (get_linux_version() < 2004000)
		old_linux = 1;

	if (ioctl(mdfd, GET_ARRAY_INFO, &info.array)>=0) {
		fprintf(stderr, Name ": device %s already active - cannot assemble it\n",
			mddev);
		return 1;
	}
	ioctl(mdfd, STOP_ARRAY, NULL); /* just incase it was started but has no content */

	/*
	 * If any subdevs are listed, then any that don't
	 * match ident are discarded.  Remainder must all match and
	 * become the array.
	 * If no subdevs, then we scan all devices in the config file, but
	 * there must be something in the identity
	 */

	if (!devlist &&
	    ident->uuid_set == 0 &&
	    ident->super_minor < 0 &&
	    ident->devices == NULL) {
		fprintf(stderr, Name ": No identity information available for %s - cannot assemble.\n",
			mddev);
		return 1;
	}
	if (devlist == NULL)
		devlist = conf_get_devs(conffile);
	else inargv = 1;

	tmpdev = devlist; num_devs = 0;
	while (tmpdev) {
		num_devs++;
		tmpdev = tmpdev->next;
	}
	devices = malloc(num_devs * sizeof(*devices));

	if (!st && ident->st) st = ident->st;

	if (verbose>0)
	    fprintf(stderr, Name ": looking for devices for %s\n",
		    mddev);

	while ( devlist) {
		char *devname;
		int dfd;
		struct stat stb;
		struct supertype *tst = st;

		devname = devlist->devname;
		devlist = devlist->next;

		if (ident->devices &&
		    !match_oneof(ident->devices, devname)) {
			if ((inargv && verbose>=0) || verbose > 0)
				fprintf(stderr, Name ": %s is not one of %s\n", devname, ident->devices);
			continue;
		}

		if (super) {
			free(super);
			super = NULL;
		}
		
		dfd = dev_open(devname, O_RDONLY|O_EXCL);
		if (dfd < 0) {
			if ((inargv && verbose >= 0) || verbose > 0)
				fprintf(stderr, Name ": cannot open device %s: %s\n",
					devname, strerror(errno));
		} else if (fstat(dfd, &stb)< 0) {
			/* Impossible! */
			fprintf(stderr, Name ": fstat failed for %s: %s\n",
				devname, strerror(errno));
		} else if ((stb.st_mode & S_IFMT) != S_IFBLK) {
			fprintf(stderr, Name ": %s is not a block device.\n",
				devname);
		} else if (!tst && (tst = guess_super(dfd)) == NULL) {
			if ((inargv && verbose >= 0) || verbose > 0)
				fprintf(stderr, Name ": no recogniseable superblock\n");
		} else if (tst->ss->load_super(tst,dfd, &super, NULL)) {
			if ((inargv && verbose >= 0) || verbose > 0)
				fprintf( stderr, Name ": no RAID superblock on %s\n",
					 devname);
		} else {
			tst->ss->getinfo_super(&info, &ident2, super);
		}
		if (dfd >= 0) close(dfd);

		if (ident->uuid_set && (!update || strcmp(update, "uuid")!= 0) &&
		    (!super || same_uuid(info.uuid, ident->uuid, tst->ss->swapuuid)==0)) {
			if ((inargv && verbose >= 0) || verbose > 0)
				fprintf(stderr, Name ": %s has wrong uuid.\n",
					devname);
			continue;
		}
		if (ident->name[0] &&
		    (!super || strncmp(ident2.name, ident->name, 32)!=0)) {
			if ((inargv && verbose >= 0) || verbose > 0)
				fprintf(stderr, Name ": %s has wrong name.\n",
					devname);
			continue;
		}
		if (ident->super_minor != UnSet &&
		    (!super || ident->super_minor != info.array.md_minor)) {
			if ((inargv && verbose >= 0) || verbose > 0)
				fprintf(stderr, Name ": %s has wrong super-minor.\n",
					devname);
			continue;
		}
		if (ident->level != UnSet &&
		    (!super|| ident->level != info.array.level)) {
			if ((inargv && verbose >= 0) || verbose > 0)
				fprintf(stderr, Name ": %s has wrong raid level.\n",
					devname);
			continue;
		}
		if (ident->raid_disks != UnSet &&
		    (!super || ident->raid_disks!= info.array.raid_disks)) {
			if ((inargv && verbose >= 0) || verbose > 0)
				fprintf(stderr, Name ": %s requires wrong number of drives.\n",
					devname);
			continue;
		}

		/* If we are this far, then we are commited to this device.
		 * If the super_block doesn't exist, or doesn't match others,
		 * then we cannot continue
		 */

		if (!super) {
			fprintf(stderr, Name ": %s has no superblock - assembly aborted\n",
				devname);
			free(first_super);
			return 1;
		}


		st = tst; /* commit to this format, if haven't already */
		if (st->ss->compare_super(&first_super, super)) {
			fprintf(stderr, Name ": superblock on %s doesn't match others - assembly aborted\n",
				devname);
			free(super);
			free(first_super);
			return 1;
		}

		/* looks like a good enough match to update the super block if needed */
		if (update) {
			/* prepare useful information in info structures */
			struct stat stb2;
			fstat(mdfd, &stb2);
			info.array.md_minor = minor(stb2.st_rdev);

			if (strcmp(update, "uuid")==0 &&
			    !ident->uuid_set) {
				int rfd;
				if ((rfd = open("/dev/urandom", O_RDONLY)) < 0 ||
				    read(rfd, ident->uuid, 16) != 16) {
					*(__u32*)(ident->uuid) = random();
					*(__u32*)(ident->uuid+1) = random();
					*(__u32*)(ident->uuid+2) = random();
					*(__u32*)(ident->uuid+3) = random();
				}
				if (rfd >= 0) close(rfd);
				ident->uuid_set = 1;
			}
			memcpy(info.uuid, ident->uuid, 16);
			st->ss->update_super(&info, super, update, devname, verbose);
			
			dfd = dev_open(devname, O_RDWR|O_EXCL);
			if (dfd < 0) 
				fprintf(stderr, Name ": Cannot open %s for superblock update\n",
					devname);
			else if (st->ss->store_super(st, dfd, super))
				fprintf(stderr, Name ": Could not re-write superblock on %s.\n",
					devname);
			if (dfd >= 0)
				close(dfd);
		}

		if (verbose > 0)
			fprintf(stderr, Name ": %s is identified as a member of %s, slot %d.\n",
				devname, mddev, info.disk.raid_disk);
		devices[devcnt].devname = devname;
		devices[devcnt].major = major(stb.st_rdev);
		devices[devcnt].minor = minor(stb.st_rdev);
		devices[devcnt].oldmajor = info.disk.major;
		devices[devcnt].oldminor = info.disk.minor;
		devices[devcnt].events = info.events;
		devices[devcnt].raid_disk = info.disk.raid_disk;
		devices[devcnt].disk_nr = info.disk.number;
		devices[devcnt].uptodate = 0;
		devices[devcnt].state = info.disk.state;
		if (most_recent < devcnt) {
			if (devices[devcnt].events
			    > devices[most_recent].events)
				most_recent = devcnt;
		}
		if (info.array.level == -4) 
			/* with multipath, the raid_disk from the superblock is meaningless */
			i = devcnt;
		else
			i = devices[devcnt].raid_disk;
		if (i+1 == 0) {
			if (nextspare < info.array.raid_disks)
				nextspare = info.array.raid_disks;
			i = nextspare++;
		}
		if (i < 10000) {
			if (i >= bestcnt) {
				unsigned int newbestcnt = i+10;
				int *newbest = malloc(sizeof(int)*newbestcnt);
				unsigned int c;
				for (c=0; c < newbestcnt; c++)
					if (c < bestcnt)
						newbest[c] = best[c];
					else
						newbest[c] = -1;
				if (best)free(best);
				best = newbest;
				bestcnt = newbestcnt;
			}
			if (best[i] == -1
			    || devices[best[i]].events < devices[devcnt].events)
				best[i] = devcnt;
		}
		devcnt++;
	}

	if (super)
		free(super);
	super = NULL;

	if (update && strcmp(update, "byteorder")==0)
		st->minor_version = 90;

	if (devcnt == 0) {
		fprintf(stderr, Name ": no devices found for %s\n",
			mddev);
		free(first_super);
		return 1;
	}

	st->ss->getinfo_super(&info, &ident2, first_super);

	/* now we have some devices that might be suitable.
	 * I wonder how many
	 */
	avail = malloc(info.array.raid_disks);
	memset(avail, 0, info.array.raid_disks);
	okcnt = 0;
	sparecnt=0;
	for (i=0; i< bestcnt ;i++) {
		int j = best[i];
		int event_margin = 1; /* always allow a difference of '1'
				       * like the kernel does
				       */
		if (j < 0) continue;
		/* note: we ignore error flags in multipath arrays
		 * as they don't make sense
		 */
		if (info.array.level != -4)
			if (!(devices[j].state & (1<<MD_DISK_SYNC))) {
				if (!(devices[j].state & (1<<MD_DISK_FAULTY)))
					sparecnt++;
				continue;
			}
		if (devices[j].events+event_margin >=
		    devices[most_recent].events) {
			devices[j].uptodate = 1;
			if (i < info.array.raid_disks) {
				okcnt++;
				avail[i]=1;
			} else
				sparecnt++;
		}
	}
	while (force && !enough(info.array.level, info.array.raid_disks,
				info.array.layout,
				avail, okcnt)) {
		/* Choose the newest best drive which is
		 * not up-to-date, update the superblock
		 * and add it.
		 */
		int fd;
		chosen_drive = -1;
		for (i=0; i<info.array.raid_disks && i < bestcnt; i++) {
			int j = best[i];
			if (j>=0 &&
			    !devices[j].uptodate &&
			    devices[j].events > 0 &&
			    (chosen_drive < 0 ||
			     devices[j].events > devices[chosen_drive].events))
				chosen_drive = j;
		}
		if (chosen_drive < 0)
			break;
		if (verbose >= 0)
			fprintf(stderr, Name ": forcing event count in %s(%d) from %d upto %d\n",
				devices[chosen_drive].devname, devices[chosen_drive].raid_disk,
				(int)(devices[chosen_drive].events),
				(int)(devices[most_recent].events));
		fd = dev_open(devices[chosen_drive].devname, O_RDWR|O_EXCL);
		if (fd < 0) {
			fprintf(stderr, Name ": Couldn't open %s for write - not updating\n",
				devices[chosen_drive].devname);
			devices[chosen_drive].events = 0;
			continue;
		}
		if (st->ss->load_super(st,fd, &super, NULL)) {
			close(fd);
			fprintf(stderr, Name ": RAID superblock disappeared from %s - not updating.\n",
				devices[chosen_drive].devname);
			devices[chosen_drive].events = 0;
			continue;
		}
		info.events = devices[most_recent].events;
		st->ss->update_super(&info, super, "force", devices[chosen_drive].devname, verbose);

		if (st->ss->store_super(st, fd, super)) {
			close(fd);
			fprintf(stderr, Name ": Could not re-write superblock on %s\n",
				devices[chosen_drive].devname);
			devices[chosen_drive].events = 0;
			free(super);
			continue;
		}
		close(fd);
		devices[chosen_drive].events = devices[most_recent].events;
		devices[chosen_drive].uptodate = 1;
		avail[chosen_drive] = 1;
		okcnt++;
		free(super);
	}

	/* Now we want to look at the superblock which the kernel will base things on
	 * and compare the devices that we think are working with the devices that the
	 * superblock thinks are working.
	 * If there are differences and --force is given, then update this chosen
	 * superblock.
	 */
	chosen_drive = -1;
	super = NULL;
	for (i=0; chosen_drive < 0 && i<bestcnt; i++) {
		int j = best[i];
		int fd;

		if (j<0)
			continue;
		if (!devices[j].uptodate)
			continue;
		chosen_drive = j;
		if ((fd=dev_open(devices[j].devname, O_RDONLY|O_EXCL))< 0) {
			fprintf(stderr, Name ": Cannot open %s: %s\n",
				devices[j].devname, strerror(errno));
			return 1;
		}
		if (st->ss->load_super(st,fd, &super, NULL)) {
			close(fd);
			fprintf(stderr, Name ": RAID superblock has disappeared from %s\n",
				devices[j].devname);
			return 1;
		}
		close(fd);
	}
	if (super == NULL) {
		fprintf(stderr, Name ": No suitable drives found for %s\n", mddev);
		return 1;
	}
	st->ss->getinfo_super(&info, &ident2, super);
	for (i=0; i<bestcnt; i++) {
		int j = best[i];
		unsigned int desired_state;

		if (i < info.array.raid_disks)
			desired_state = (1<<MD_DISK_ACTIVE) | (1<<MD_DISK_SYNC);
		else
			desired_state = 0;

		if (j<0)
			continue;
		if (!devices[j].uptodate)
			continue;
		info.disk.number = devices[j].disk_nr;
		info.disk.raid_disk = i;
		info.disk.state = desired_state;

		if (devices[j].uptodate &&
		    st->ss->update_super(&info, super, "assemble", NULL, verbose)) {
			if (force) {
				if (verbose >= 0)
					fprintf(stderr, Name ": "
						"clearing FAULTY flag for device %d in %s for %s\n",
						j, mddev, devices[j].devname);
				change = 1;
			} else {
				if (verbose >= -1)
					fprintf(stderr, Name ": "
						"device %d in %s has wrong state in superblock, but %s seems ok\n",
						i, mddev, devices[j].devname);
			}
		}
#if 0
		if (!devices[j].uptodate &&
		    !(super.disks[i].state & (1 << MD_DISK_FAULTY))) {
			fprintf(stderr, Name ": devices %d of %s is not marked FAULTY in superblock, but cannot be found\n",
				i, mddev);
		}
#endif
	}
	if (force && okcnt == info.array.raid_disks-1) {
		/* FIXME check event count */
		change += st->ss->update_super(&info, super, "force", 
					devices[chosen_drive].devname, verbose);
	}

	if (change) {
		int fd;
		fd = dev_open(devices[chosen_drive].devname, O_RDWR|O_EXCL);
		if (fd < 0) {
			fprintf(stderr, Name ": Could open %s for write - cannot Assemble array.\n",
				devices[chosen_drive].devname);
			return 1;
		}
		if (st->ss->store_super(st, fd, super)) {
			close(fd);
			fprintf(stderr, Name ": Could not re-write superblock on %s\n",
				devices[chosen_drive].devname);
			return 1;
		}
		close(fd);
	}

	/* count number of in-sync devices according to the superblock.
	 * We must have this number to start the array without -s or -R
	 */
	req_cnt = info.array.working_disks;

	/* Almost ready to actually *do* something */
	if (!old_linux) {
		int rv;
		if ((vers % 100) >= 1) { /* can use different versions */
			mdu_array_info_t inf;
			memset(&inf, 0, sizeof(inf));
			inf.major_version = st->ss->major;
			inf.minor_version = st->minor_version;
			rv = ioctl(mdfd, SET_ARRAY_INFO, &inf);
		} else 
			rv = ioctl(mdfd, SET_ARRAY_INFO, NULL);

		if (rv) {
			fprintf(stderr, Name ": SET_ARRAY_INFO failed for %s: %s\n",
				mddev, strerror(errno));
			return 1;
		}
		if (ident->bitmap_fd >= 0) {
			if (ioctl(mdfd, SET_BITMAP_FILE, ident->bitmap_fd) != 0) {
				fprintf(stderr, Name ": SET_BITMAP_FILE failed.\n");
				return 1;
			}
		}
					
		/* First, add the raid disks, but add the chosen one last */
		for (i=0; i<= bestcnt; i++) {
			int j;
			if (i < bestcnt) {
				j = best[i];
				if (j == chosen_drive)
					continue;
			} else
				j = chosen_drive;

			if (j >= 0 /* && devices[j].uptodate */) {
				mdu_disk_info_t disk;
				memset(&disk, 0, sizeof(disk));
				disk.major = devices[j].major;
				disk.minor = devices[j].minor;
				if (ioctl(mdfd, ADD_NEW_DISK, &disk)!=0) {
					fprintf(stderr, Name ": failed to add %s to %s: %s\n",
						devices[j].devname,
						mddev,
						strerror(errno));
					if (i < info.array.raid_disks || i == bestcnt)
						okcnt--;
					else
						sparecnt--;
				} else if (verbose > 0)
					fprintf(stderr, Name ": added %s to %s as %d\n",
						devices[j].devname, mddev, devices[j].raid_disk);
			} else if (verbose > 0 && i < info.array.raid_disks)
				fprintf(stderr, Name ": no uptodate device for slot %d of %s\n",
					i, mddev);
		}
		
		if (runstop == 1 ||
		    (runstop == 0 && 
		     ( enough(info.array.level, info.array.raid_disks, info.array.layout, avail, okcnt) &&
		       (okcnt >= req_cnt || start_partial_ok)
			     ))) {
			if (ioctl(mdfd, RUN_ARRAY, NULL)==0) {
				if (verbose >= 0) {
					fprintf(stderr, Name ": %s has been started with %d drive%s",
						mddev, okcnt, okcnt==1?"":"s");
					if (okcnt < info.array.raid_disks) 
						fprintf(stderr, " (out of %d)", info.array.raid_disks);
					if (sparecnt)
						fprintf(stderr, " and %d spare%s", sparecnt, sparecnt==1?"":"s");
					fprintf(stderr, ".\n");
				}
				return 0;
			}
			fprintf(stderr, Name ": failed to RUN_ARRAY %s: %s\n",
				mddev, strerror(errno));
			return 1;
		}
		if (runstop == -1) {
			fprintf(stderr, Name ": %s assembled from %d drive%s, but not started.\n",
				mddev, okcnt, okcnt==1?"":"s");
			return 0;
		}
		if (verbose >= 0) {
			fprintf(stderr, Name ": %s assembled from %d drive%s", mddev, okcnt, okcnt==1?"":"s");
			if (sparecnt)
				fprintf(stderr, " and %d spare%s", sparecnt, sparecnt==1?"":"s");
			if (!enough(info.array.level, info.array.raid_disks, info.array.layout, avail, okcnt))
				fprintf(stderr, " - not enough to start the array.\n");
			else {
				if (req_cnt == info.array.raid_disks)
					fprintf(stderr, " - need all %d to start it", req_cnt);
				else
					fprintf(stderr, " - need %d of %d to start", req_cnt, info.array.raid_disks);
				fprintf(stderr, " (use --run to insist).\n");
			}
		}
		return 1;
	} else {
		/* The "chosen_drive" is a good choice, and if necessary, the superblock has
		 * been updated to point to the current locations of devices.
		 * so we can just start the array
		 */
		unsigned long dev;
		dev = makedev(devices[chosen_drive].major,
			    devices[chosen_drive].minor);
		if (ioctl(mdfd, START_ARRAY, dev)) {
		    fprintf(stderr, Name ": Cannot start array: %s\n",
			    strerror(errno));
		}
		
	}
	return 0;
}
Beispiel #5
0
int Query(char *dev)
{
	/* Give a brief description of the device,
	 * whether it is an md device and whether it has
	 * a superblock
	 */
	int fd = open(dev, O_RDONLY);
	int vers;
	int ioctlerr;
	int superror;
	struct mdinfo info;
	mdu_array_info_t array;
	struct supertype *st = NULL;

	unsigned long long larray_size;
	struct stat stb;
	char *mddev;
	mdu_disk_info_t disc;
	char *activity;

	if (fd < 0){
		pr_err("cannot open %s: %s\n",
			dev, strerror(errno));
		return 1;
	}

	vers = md_get_version(fd);
	if (ioctl(fd, GET_ARRAY_INFO, &array)<0)
		ioctlerr = errno;
	else ioctlerr = 0;

	fstat(fd, &stb);

	if (vers>=9000 && !ioctlerr) {
		if (!get_dev_size(fd, NULL, &larray_size))
			larray_size = 0;
	}

	if (vers < 0)
		printf("%s: is not an md array\n", dev);
	else if (vers < 9000)
		printf("%s: is an md device, but kernel cannot provide details\n", dev);
	else if (ioctlerr == ENODEV)
		printf("%s: is an md device which is not active\n", dev);
	else if (ioctlerr)
		printf("%s: is an md device, but gives \"%s\" when queried\n",
		       dev, strerror(ioctlerr));
	else {
		printf("%s: %s %s %d devices, %d spare%s. Use mdadm --detail for more detail.\n",
		       dev,
		       human_size_brief(larray_size),
		       map_num(pers, array.level),
		       array.raid_disks,
		       array.spare_disks, array.spare_disks==1?"":"s");
	}
	st = guess_super(fd);
	if (st)
		superror = st->ss->load_super(st, fd, dev);
	else
		superror = -1;
	close(fd);
	if (superror == 0) {
		/* array might be active... */
		st->ss->getinfo_super(st, &info, NULL);
		if (st->ss == &super0) {
			mddev = get_md_name(info.array.md_minor);
			disc.number = info.disk.number;
			activity = "undetected";
			if (mddev && (fd = open(mddev, O_RDONLY))>=0) {
				if (md_get_version(fd) >= 9000 &&
				    ioctl(fd, GET_ARRAY_INFO, &array)>= 0) {
					if (ioctl(fd, GET_DISK_INFO, &disc) >= 0 &&
					    makedev((unsigned)disc.major,(unsigned)disc.minor) == stb.st_rdev)
						activity = "active";
					else
						activity = "mismatch";
				}
				close(fd);
			}
		} else {
			activity = "unknown";
			mddev = "array";
		}
		printf("%s: device %d in %d device %s %s %s.  Use mdadm --examine for more detail.\n",
		       dev,
		       info.disk.number, info.array.raid_disks,
		       activity,
		       map_num(pers, info.array.level),
		       mddev);
		if (st->ss == &super0)
			put_md_name(mddev);
	}
	return 0;
}
Beispiel #6
0
int Manage_subdevs(char *devname, int fd,
		   struct mddev_dev *devlist, int verbose, int test,
		   char *update)
{
	/* do something to each dev.
	 * devmode can be
	 *  'a' - add the device
	 *	   try HOT_ADD_DISK
	 *         If that fails EINVAL, try ADD_NEW_DISK
	 *  'r' - remove the device HOT_REMOVE_DISK
	 *        device can be 'faulty' or 'detached' in which case all
	 *	  matching devices are removed.
	 *  'f' - set the device faulty SET_DISK_FAULTY
	 *        device can be 'detached' in which case any device that
	 *	  is inaccessible will be marked faulty.
	 * For 'f' and 'r', the device can also be a kernel-internal
	 * name such as 'sdb'.
	 */
	struct mddev_dev *add_devlist = NULL;
	mdu_array_info_t array;
	mdu_disk_info_t disc;
	unsigned long long array_size;
	struct mddev_dev *dv, *next = NULL;
	struct stat stb;
	int j, jnext = 0;
	int tfd = -1;
	struct supertype *st, *tst;
	char *subarray = NULL;
	int duuid[4];
	int ouuid[4];
	int lfd = -1;
	int sysfd = -1;
	int count = 0; /* number of actions taken */

	if (ioctl(fd, GET_ARRAY_INFO, &array)) {
		fprintf(stderr, Name ": cannot get array info for %s\n",
			devname);
		return 1;
	}

	/* array.size is only 32 bit and may be truncated.
	 * So read from sysfs if possible, and record number of sectors
	 */

	array_size = get_component_size(fd);
	if (array_size <= 0)
		array_size = array.size * 2;

	tst = super_by_fd(fd, &subarray);
	if (!tst) {
		fprintf(stderr, Name ": unsupport array - version %d.%d\n",
			array.major_version, array.minor_version);
		return 1;
	}

	stb.st_rdev = 0;
	for (dv = devlist, j=0 ; dv; dv = next, j = jnext) {
		unsigned long long ldsize;
		char dvname[20];
		char *dnprintable = dv->devname;
		char *add_dev = dv->devname;
		int err;
		int re_add_failed = 0;

		next = dv->next;
		jnext = 0;

		if (strcmp(dv->devname, "failed")==0 ||
		    strcmp(dv->devname, "faulty")==0) {
			int remaining_disks = array.nr_disks;
			if (dv->disposition != 'r') {
				fprintf(stderr, Name ": %s only meaningful "
					"with -r, not -%c\n",
					dv->devname, dv->disposition);
				return 1;
			}
			for (; j < 1024 && remaining_disks > 0; j++) {
				unsigned dev;
				disc.number = j;
				if (ioctl(fd, GET_DISK_INFO, &disc))
					continue;
				if (disc.major == 0 && disc.minor == 0)
					continue;
				remaining_disks --;
				if ((disc.state & 1) == 0) /* faulty */
					continue;
				dev = makedev(disc.major, disc.minor);
				if (stb.st_rdev == dev)
					/* already did that one */
					continue;
				stb.st_rdev = dev;
				next = dv;
				/* same slot again next time - things might
				 * have reshuffled */
				jnext = j;
				sprintf(dvname,"%d:%d", disc.major, disc.minor);
				dnprintable = dvname;
				break;
			}
			if (next != dv)
				continue;
		} else if (strcmp(dv->devname, "detached") == 0) {
			int remaining_disks = array.nr_disks;
			if (dv->disposition != 'r' && dv->disposition != 'f') {
				fprintf(stderr, Name ": %s only meaningful "
					"with -r of -f, not -%c\n",
					dv->devname, dv->disposition);
				return 1;
			}
			for (; j < 1024 && remaining_disks > 0; j++) {
				int sfd;
				unsigned dev;
				disc.number = j;
				if (ioctl(fd, GET_DISK_INFO, &disc))
					continue;
				if (disc.major == 0 && disc.minor == 0)
					continue;
				remaining_disks --;
				sprintf(dvname,"%d:%d", disc.major, disc.minor);
				sfd = dev_open(dvname, O_RDONLY);
				if (sfd >= 0) {
					close(sfd);
					continue;
				}
				if (dv->disposition == 'f' &&
				    (disc.state & 1) == 1) /* already faulty */
					continue;
				if (errno != ENXIO)
					continue;
				dev = makedev(disc.major, disc.minor);
				if (stb.st_rdev == dev)
					/* already did that one */
					continue;
				stb.st_rdev = dev;
				next = dv;
				/* same slot again next time - things might
				 * have reshuffled */
				jnext = j;
				dnprintable = dvname;
				break;
			}
			if (next != dv)
				continue;
		} else if (strcmp(dv->devname, "missing") == 0) {
			if (dv->disposition != 'a' || dv->re_add == 0) {
				fprintf(stderr, Name ": 'missing' only meaningful "
					"with --re-add\n");
				return 1;
			}
			if (add_devlist == NULL)
				add_devlist = conf_get_devs();
			if (add_devlist == NULL) {
				fprintf(stderr, Name ": no devices to scan for missing members.");
				continue;
			}
			add_dev = add_devlist->devname;
			add_devlist = add_devlist->next;
			if (add_devlist != NULL)
				next = dv;
			if (stat(add_dev, &stb) < 0)
				continue;
		} else if (strchr(dv->devname, '/') == NULL &&
			   strchr(dv->devname, ':') == NULL &&
			   strlen(dv->devname) < 50) {
			/* Assume this is a kernel-internal name like 'sda1' */
			int found = 0;
			char dname[55];
			if (dv->disposition != 'r' && dv->disposition != 'f') {
				fprintf(stderr, Name ": %s only meaningful "
					"with -r or -f, not -%c\n",
					dv->devname, dv->disposition);
				return 1;
			}

			sprintf(dname, "dev-%s", dv->devname);
			sysfd = sysfs_open(fd2devnum(fd), dname, "block/dev");
			if (sysfd >= 0) {
				char dn[20];
				int mj,mn;
				if (sysfs_fd_get_str(sysfd, dn, 20) > 0 &&
				    sscanf(dn, "%d:%d", &mj,&mn) == 2) {
					stb.st_rdev = makedev(mj,mn);
					found = 1;
				}
				close(sysfd);
				sysfd = -1;
			}
			if (!found) {
				sysfd = sysfs_open(fd2devnum(fd), dname, "state");
				if (sysfd < 0) {
					fprintf(stderr, Name ": %s does not appear "
						"to be a component of %s\n",
						dv->devname, devname);
					return 1;
				}
			}
		} else {
			j = 0;

			tfd = dev_open(dv->devname, O_RDONLY);
			if (tfd < 0 && dv->disposition == 'r' &&
			    lstat(dv->devname, &stb) == 0)
				/* Be happy, the lstat worked, that is
				 * enough for --remove
				 */
				;
			else {
				if (tfd < 0 || fstat(tfd, &stb) != 0) {
					fprintf(stderr, Name ": cannot find %s: %s\n",
						dv->devname, strerror(errno));
					if (tfd >= 0)
						close(tfd);
					return 1;
				}
				close(tfd);
				tfd = -1;
			}
			if ((stb.st_mode & S_IFMT) != S_IFBLK) {
				fprintf(stderr, Name ": %s is not a "
					"block device.\n",
					dv->devname);
				return 1;
			}
		}
		switch(dv->disposition){
		default:
			fprintf(stderr, Name ": internal error - devmode[%s]=%d\n",
				dv->devname, dv->disposition);
			return 1;
		case 'a':
			/* add the device */
			if (subarray) {
				fprintf(stderr, Name ": Cannot add disks to a"
					" \'member\' array, perform this"
					" operation on the parent container\n");
				return 1;
			}
			/* Make sure it isn't in use (in 2.6 or later) */
			tfd = dev_open(add_dev, O_RDONLY|O_EXCL|O_DIRECT);
			if (tfd < 0 && add_dev != dv->devname)
				continue;
			if (tfd < 0) {
				fprintf(stderr, Name ": Cannot open %s: %s\n",
					dv->devname, strerror(errno));
				return 1;
			}

			st = dup_super(tst);

			if (array.not_persistent==0)
				st->ss->load_super(st, tfd, NULL);

			if (add_dev == dv->devname) {
				if (!get_dev_size(tfd, dv->devname, &ldsize)) {
					close(tfd);
					return 1;
				}
			} else if (!get_dev_size(tfd, NULL, &ldsize)) {
				close(tfd);
				tfd = -1;
				continue;
			}

			if (!tst->ss->external &&
			    array.major_version == 0 &&
			    md_get_version(fd)%100 < 2) {
				close(tfd);
				tfd = -1;
				if (ioctl(fd, HOT_ADD_DISK,
					  (unsigned long)stb.st_rdev)==0) {
					if (verbose >= 0)
						fprintf(stderr, Name ": hot added %s\n",
							add_dev);
					continue;
				}

				fprintf(stderr, Name ": hot add failed for %s: %s\n",
					add_dev, strerror(errno));
				return 1;
			}

			if (array.not_persistent == 0 || tst->ss->external) {

				/* need to find a sample superblock to copy, and
				 * a spare slot to use.
				 * For 'external' array (well, container based),
				 * We can just load the metadata for the array.
				 */
				if (tst->sb)
					/* already loaded */;
				else if (tst->ss->external) {
					tst->ss->load_container(tst, fd, NULL);
				} else for (j = 0; j < tst->max_devs; j++) {
					char *dev;
					int dfd;
					disc.number = j;
					if (ioctl(fd, GET_DISK_INFO, &disc))
						continue;
					if (disc.major==0 && disc.minor==0)
						continue;
					if ((disc.state & 4)==0) continue; /* sync */
					/* Looks like a good device to try */
					dev = map_dev(disc.major, disc.minor, 1);
					if (!dev) continue;
					dfd = dev_open(dev, O_RDONLY);
					if (dfd < 0) continue;
					if (tst->ss->load_super(tst, dfd,
								NULL)) {
						close(dfd);
						continue;
					}
					close(dfd);
					break;
				}
				/* FIXME this is a bad test to be using */
				if (!tst->sb) {
					close(tfd);
					fprintf(stderr, Name ": cannot load array metadata from %s\n", devname);
					return 1;
				}

				/* Make sure device is large enough */
				if (tst->ss->avail_size(tst, ldsize/512) <
				    array_size) {
					close(tfd);
					tfd = -1;
					if (add_dev != dv->devname)
						continue;
					fprintf(stderr, Name ": %s not large enough to join array\n",
						dv->devname);
					return 1;
				}

				/* Possibly this device was recently part of the array
				 * and was temporarily removed, and is now being re-added.
				 * If so, we can simply re-add it.
				 */
				tst->ss->uuid_from_super(tst, duuid);

				if (st->sb) {
					struct mdinfo mdi;
					st->ss->getinfo_super(st, &mdi, NULL);
					st->ss->uuid_from_super(st, ouuid);
					if ((mdi.disk.state & (1<<MD_DISK_ACTIVE)) &&
					    !(mdi.disk.state & (1<<MD_DISK_FAULTY)) &&
					    memcmp(duuid, ouuid, sizeof(ouuid))==0) {
						/* look like it is worth a try.  Need to
						 * make sure kernel will accept it though.
						 */
						/* re-add doesn't work for version-1 superblocks
						 * before 2.6.18 :-(
						 */
						if (array.major_version == 1 &&
						    get_linux_version() <= 2006018)
							goto skip_re_add;
						disc.number = mdi.disk.number;
						if (ioctl(fd, GET_DISK_INFO, &disc) != 0
						    || disc.major != 0 || disc.minor != 0
						    || !enough_fd(fd))
							goto skip_re_add;
						disc.major = major(stb.st_rdev);
						disc.minor = minor(stb.st_rdev);
						disc.number = mdi.disk.number;
						disc.raid_disk = mdi.disk.raid_disk;
						disc.state = mdi.disk.state;
						if (dv->writemostly == 1)
							disc.state |= 1 << MD_DISK_WRITEMOSTLY;
						if (dv->writemostly == 2)
							disc.state &= ~(1 << MD_DISK_WRITEMOSTLY);
						remove_partitions(tfd);
						close(tfd);
						tfd = -1;
						if (update) {
							int rv = -1;
							tfd = dev_open(dv->devname, O_RDWR);

							if (tfd >= 0)
								rv = st->ss->update_super(
									st, NULL, update,
									devname, verbose, 0, NULL);
							if (rv == 0)
								rv = st->ss->store_super(st, tfd);
							close(tfd);
							tfd = -1;
							if (rv != 0) {
								fprintf(stderr, Name ": failed to update"
									" superblock during re-add\n");
								return 1;
							}
						}
						/* don't even try if disk is marked as faulty */
						errno = 0;
						if (ioctl(fd, ADD_NEW_DISK, &disc) == 0) {
							if (verbose >= 0)
								fprintf(stderr, Name ": re-added %s\n", add_dev);
							count++;
							continue;
						}
						if (errno == ENOMEM || errno == EROFS) {
							fprintf(stderr, Name ": add new device failed for %s: %s\n",
								add_dev, strerror(errno));
							if (add_dev != dv->devname)
								continue;
							return 1;
						}
					skip_re_add:
						re_add_failed = 1;
					}
					st->ss->free_super(st);
				}
				if (add_dev != dv->devname) {
					if (verbose > 0)
						fprintf(stderr, Name
							": --re-add for %s to %s is not possible\n",
							add_dev, devname);
					if (tfd >= 0) {
						close(tfd);
						tfd = -1;
					}
					continue;
				}
				if (dv->re_add) {
					if (tfd >= 0)
						close(tfd);
					fprintf(stderr, Name
						": --re-add for %s to %s is not possible\n",
						dv->devname, devname);
					return 1;
				}
				if (re_add_failed) {
					fprintf(stderr, Name ": %s reports being an active member for %s, but a --re-add fails.\n",
						dv->devname, devname);
					fprintf(stderr, Name ": not performing --add as that would convert %s in to a spare.\n",
						dv->devname);
					fprintf(stderr, Name ": To make this a spare, use \"mdadm --zero-superblock %s\" first.\n",	
						dv->devname);
					if (tfd >= 0)
						close(tfd);
					return 1;
				}
			} else {
				/* non-persistent. Must ensure that new drive
				 * is at least array.size big.
				 */
				if (ldsize/512 < array_size) {
					fprintf(stderr, Name ": %s not large enough to join array\n",
						dv->devname);
					if (tfd >= 0)
						close(tfd);
					return 1;
				}
			}
			/* committed to really trying this device now*/
			if (tfd >= 0) {
				remove_partitions(tfd);
				close(tfd);
				tfd = -1;
			}
			/* in 2.6.17 and earlier, version-1 superblocks won't
			 * use the number we write, but will choose a free number.
			 * we must choose the same free number, which requires
			 * starting at 'raid_disks' and counting up
			 */
			for (j = array.raid_disks; j< tst->max_devs; j++) {
				disc.number = j;
				if (ioctl(fd, GET_DISK_INFO, &disc))
					break;
				if (disc.major==0 && disc.minor==0)
					break;
				if (disc.state & 8) /* removed */
					break;
			}
			disc.major = major(stb.st_rdev);
			disc.minor = minor(stb.st_rdev);
			disc.number =j;
			disc.state = 0;
			if (array.not_persistent==0) {
				int dfd;
				if (dv->writemostly == 1)
					disc.state |= 1 << MD_DISK_WRITEMOSTLY;
				dfd = dev_open(dv->devname, O_RDWR | O_EXCL|O_DIRECT);
				if (tst->ss->add_to_super(tst, &disc, dfd,
							  dv->devname)) {
					close(dfd);
					return 1;
				}
				if (tst->ss->write_init_super(tst)) {
					close(dfd);
					return 1;
				}
			} else if (dv->re_add) {
				/*  this had better be raid1.
				 * As we are "--re-add"ing we must find a spare slot
				 * to fill.
				 */
				char *used = malloc(array.raid_disks);
				memset(used, 0, array.raid_disks);
				for (j=0; j< tst->max_devs; j++) {
					mdu_disk_info_t disc2;
					disc2.number = j;
					if (ioctl(fd, GET_DISK_INFO, &disc2))
						continue;
					if (disc2.major==0 && disc2.minor==0)
						continue;
					if (disc2.state & 8) /* removed */
						continue;
					if (disc2.raid_disk < 0)
						continue;
					if (disc2.raid_disk > array.raid_disks)
						continue;
					used[disc2.raid_disk] = 1;
				}
				for (j=0 ; j<array.raid_disks; j++)
					if (!used[j]) {
						disc.raid_disk = j;
						disc.state |= (1<<MD_DISK_SYNC);
						break;
					}
				free(used);
			}
			if (dv->writemostly == 1)
				disc.state |= (1 << MD_DISK_WRITEMOSTLY);
			if (tst->ss->external) {
				/* add a disk
				 * to an external metadata container */
				struct mdinfo new_mdi;
				struct mdinfo *sra;
				int container_fd;
				int devnum = fd2devnum(fd);
				int dfd;

				container_fd = open_dev_excl(devnum);
				if (container_fd < 0) {
					fprintf(stderr, Name ": add failed for %s:"
						" could not get exclusive access to container\n",
						dv->devname);
					tst->ss->free_super(tst);
					return 1;
				}

				dfd = dev_open(dv->devname, O_RDWR | O_EXCL|O_DIRECT);
				if (mdmon_running(tst->container_dev))
					tst->update_tail = &tst->updates;
				if (tst->ss->add_to_super(tst, &disc, dfd,
							  dv->devname)) {
					close(dfd);
					close(container_fd);
					return 1;
				}
				if (tst->update_tail)
					flush_metadata_updates(tst);
				else
					tst->ss->sync_metadata(tst);

				sra = sysfs_read(container_fd, -1, 0);
				if (!sra) {
					fprintf(stderr, Name ": add failed for %s: sysfs_read failed\n",
						dv->devname);
					close(container_fd);
					tst->ss->free_super(tst);
					return 1;
				}
				sra->array.level = LEVEL_CONTAINER;
				/* Need to set data_offset and component_size */
				tst->ss->getinfo_super(tst, &new_mdi, NULL);
				new_mdi.disk.major = disc.major;
				new_mdi.disk.minor = disc.minor;
				new_mdi.recovery_start = 0;
				/* Make sure fds are closed as they are O_EXCL which
				 * would block add_disk */
				tst->ss->free_super(tst);
				if (sysfs_add_disk(sra, &new_mdi, 0) != 0) {
					fprintf(stderr, Name ": add new device to external metadata"
						" failed for %s\n", dv->devname);
					close(container_fd);
					sysfs_free(sra);
					return 1;
				}
				ping_monitor_by_id(devnum);
				sysfs_free(sra);
				close(container_fd);
			} else {
				tst->ss->free_super(tst);
				if (ioctl(fd, ADD_NEW_DISK, &disc)) {
					fprintf(stderr, Name ": add new device failed for %s as %d: %s\n",
						dv->devname, j, strerror(errno));
					return 1;
				}
			}
			if (verbose >= 0)
				fprintf(stderr, Name ": added %s\n", dv->devname);
			break;

		case 'r':
			/* hot remove */
			if (subarray) {
				fprintf(stderr, Name ": Cannot remove disks from a"
					" \'member\' array, perform this"
					" operation on the parent container\n");
				if (sysfd >= 0)
					close(sysfd);
				return 1;
			}
			if (tst->ss->external) {
				/* To remove a device from a container, we must
				 * check that it isn't in use in an array.
				 * This involves looking in the 'holders'
				 * directory - there must be just one entry,
				 * the container.
				 * To ensure that it doesn't get used as a
				 * hold spare while we are checking, we
				 * get an O_EXCL open on the container
				 */
				int dnum = fd2devnum(fd);
				lfd = open_dev_excl(dnum);
				if (lfd < 0) {
					fprintf(stderr, Name
						": Cannot get exclusive access "
						" to container - odd\n");
					if (sysfd >= 0)
						close(sysfd);
					return 1;
				}
				/* in the detached case it is not possible to
				 * check if we are the unique holder, so just
				 * rely on the 'detached' checks
				 */
				if (strcmp(dv->devname, "detached") == 0 ||
				    sysfd >= 0 ||
				    sysfs_unique_holder(dnum, stb.st_rdev))
					/* pass */;
				else {
					fprintf(stderr, Name
						": %s is %s, cannot remove.\n",
						dnprintable,
						errno == EEXIST ? "still in use":
						"not a member");
					close(lfd);
					return 1;
				}
			}
			/* FIXME check that it is a current member */
			if (sysfd >= 0) {
				/* device has been removed and we don't know
				 * the major:minor number
				 */
				int n = write(sysfd, "remove", 6);
				if (n != 6)
					err = -1;
				else
					err = 0;
				close(sysfd);
				sysfd = -1;
			} else {
				err = ioctl(fd, HOT_REMOVE_DISK, (unsigned long)stb.st_rdev);
				if (err && errno == ENODEV) {
					/* Old kernels rejected this if no personality
					 * registered */
					struct mdinfo *sra = sysfs_read(fd, 0, GET_DEVS);
					struct mdinfo *dv = NULL;
					if (sra)
						dv = sra->devs;
					for ( ; dv ; dv=dv->next)
						if (dv->disk.major == (int)major(stb.st_rdev) &&
						    dv->disk.minor == (int)minor(stb.st_rdev))
							break;
					if (dv)
						err = sysfs_set_str(sra, dv,
								    "state", "remove");
					else
						err = -1;
					if (sra)
						sysfs_free(sra);
				}
			}
			if (err) {
				fprintf(stderr, Name ": hot remove failed "
					"for %s: %s\n",	dnprintable,
					strerror(errno));
				if (lfd >= 0)
					close(lfd);
				return 1;
			}
			if (tst->ss->external) {
				/*
				 * Before dropping our exclusive open we make an
				 * attempt at preventing mdmon from seeing an
				 * 'add' event before reconciling this 'remove'
				 * event.
				 */
				char *name = devnum2devname(fd2devnum(fd));

				if (!name) {
					fprintf(stderr, Name ": unable to get container name\n");
					return 1;
				}

				ping_manager(name);
				free(name);
			}
			if (lfd >= 0)
				close(lfd);
			count++;
			if (verbose >= 0)
				fprintf(stderr, Name ": hot removed %s from %s\n",
					dnprintable, devname);
			break;

		case 'f': /* set faulty */
			/* FIXME check current member */
			if ((sysfd >= 0 && write(sysfd, "faulty", 6) != 6) ||
			    (sysfd < 0 && ioctl(fd, SET_DISK_FAULTY,
						(unsigned long) stb.st_rdev))) {
				fprintf(stderr, Name ": set device faulty failed for %s:  %s\n",
					dnprintable, strerror(errno));
				if (sysfd >= 0)
					close(sysfd);
				return 1;
			}
			if (sysfd >= 0)
				close(sysfd);
			sysfd = -1;
			count++;
			if (verbose >= 0)
				fprintf(stderr, Name ": set %s faulty in %s\n",
					dnprintable, devname);
			break;
		}
	}
	if (test && count == 0)
		return 2;
	return 0;
}
Beispiel #7
0
int Manage_ro(char *devname, int fd, int readonly)
{
	/* switch to readonly or rw
	 *
	 * requires >= 0.90.0
	 * first check that array is runing
	 * use RESTART_ARRAY_RW or STOP_ARRAY_RO
	 *
	 */
	mdu_array_info_t array;
#ifndef MDASSEMBLE
	struct mdinfo *mdi;
#endif

	if (md_get_version(fd) < 9000) {
		fprintf(stderr, Name ": need md driver version 0.90.0 or later\n");
		return 1;
	}
#ifndef MDASSEMBLE
	/* If this is an externally-manage array, we need to modify the
	 * metadata_version so that mdmon doesn't undo our change.
	 */
	mdi = sysfs_read(fd, -1, GET_LEVEL|GET_VERSION);
	if (mdi &&
	    mdi->array.major_version == -1 &&
	    is_subarray(mdi->text_version)) {
		char vers[64];
		strcpy(vers, "external:");
		strcat(vers, mdi->text_version);
		if (readonly > 0) {
			int rv;
			/* We set readonly ourselves. */
			vers[9] = '-';
			sysfs_set_str(mdi, NULL, "metadata_version", vers);

			close(fd);
			rv = sysfs_set_str(mdi, NULL, "array_state", "readonly");

			if (rv < 0) {
				fprintf(stderr, Name ": failed to set readonly for %s: %s\n",
					devname, strerror(errno));

				vers[9] = mdi->text_version[0];
				sysfs_set_str(mdi, NULL, "metadata_version", vers);
				return 1;
			}
		} else {
			char *cp;
			/* We cannot set read/write - must signal mdmon */
			vers[9] = '/';
			sysfs_set_str(mdi, NULL, "metadata_version", vers);

			cp = strchr(vers+10, '/');
			if (*cp)
				*cp = 0;
			ping_monitor(vers+10);
			if (mdi->array.level <= 0)
				sysfs_set_str(mdi, NULL, "array_state", "active");
		}
		return 0;
	}
#endif
	if (ioctl(fd, GET_ARRAY_INFO, &array)) {
		fprintf(stderr, Name ": %s does not appear to be active.\n",
			devname);
		return 1;
	}

	if (readonly>0) {
		if (ioctl(fd, STOP_ARRAY_RO, NULL)) {
			fprintf(stderr, Name ": failed to set readonly for %s: %s\n",
				devname, strerror(errno));
			return 1;
		}
	} else if (readonly < 0) {
		if (ioctl(fd, RESTART_ARRAY_RW, NULL)) {
			fprintf(stderr, Name ": failed to set writable for %s: %s\n",
				devname, strerror(errno));
			return 1;
		}
	}
	return 0;
}
Beispiel #8
0
int Manage_runstop(char *devname, int fd, int runstop, int quiet)
{
	/* Run or stop the array. array must already be configured
	 * required >= 0.90.0
	 * Only print failure messages if quiet == 0;
	 * quiet > 0 means really be quiet
	 * quiet < 0 means we will try again if it fails.
	 */
	mdu_param_t param; /* unused */

	if (runstop == -1 && md_get_version(fd) < 9000) {
		if (ioctl(fd, STOP_MD, 0)) {
			if (quiet == 0) fprintf(stderr,
						Name ": stopping device %s "
						"failed: %s\n",
						devname, strerror(errno));
			return 1;
		}
	}

	if (md_get_version(fd) < 9000) {
		fprintf(stderr, Name ": need md driver version 0.90.0 or later\n");
		return 1;
	}
	/*
	if (ioctl(fd, GET_ARRAY_INFO, &array)) {
		fprintf(stderr, Name ": %s does not appear to be active.\n",
			devname);
		return 1;
	}
	*/
	if (runstop>0) {
		if (ioctl(fd, RUN_ARRAY, &param)) {
			fprintf(stderr, Name ": failed to run array %s: %s\n",
				devname, strerror(errno));
			return 1;
		}
		if (quiet <= 0)
			fprintf(stderr, Name ": started %s\n", devname);
	} else if (runstop < 0){
		struct map_ent *map = NULL;
		struct stat stb;
		struct mdinfo *mdi;
		int devnum;
		int err;
		int count;
		/* If this is an mdmon managed array, just write 'inactive'
		 * to the array state and let mdmon clear up.
		 */
		devnum = fd2devnum(fd);
		/* Get EXCL access first.  If this fails, then attempting
		 * to stop is probably a bad idea.
		 */
		close(fd);
		fd = open(devname, O_RDONLY|O_EXCL);
		if (fd < 0 || fd2devnum(fd) != devnum) {
			if (fd >= 0)
				close(fd);
			fprintf(stderr,
				Name ": Cannot get exclusive access to %s:"
				"Perhaps a running "
				"process, mounted filesystem "
				"or active volume group?\n",
				devname);
			return 1;
		}
		mdi = sysfs_read(fd, -1, GET_LEVEL|GET_VERSION);
		if (mdi &&
		    mdi->array.level > 0 &&
		    is_subarray(mdi->text_version)) {
			int err;
			/* This is mdmon managed. */
			close(fd);

			count = 25;
			while (count &&
			       (err = sysfs_set_str(mdi, NULL,
						    "array_state",
						    "inactive")) < 0
			       && errno == EBUSY) {
				usleep(200000);
				count--;
			}
			if (err && !quiet) {
				fprintf(stderr, Name
					": failed to stop array %s: %s\n",
					devname, strerror(errno));
				return 1;
			}

			/* Give monitor a chance to act */
			ping_monitor(mdi->text_version);

			fd = open_dev_excl(devnum);
			if (fd < 0) {
				fprintf(stderr, Name
					": failed to completely stop %s"
					": Device is busy\n",
					devname);
				return 1;
			}
		} else if (mdi &&
			   mdi->array.major_version == -1 &&
			   mdi->array.minor_version == -2 &&
			   !is_subarray(mdi->text_version)) {
			struct mdstat_ent *mds, *m;
			/* container, possibly mdmon-managed.
			 * Make sure mdmon isn't opening it, which
			 * would interfere with the 'stop'
			 */
			ping_monitor(mdi->sys_name);

			/* now check that there are no existing arrays
			 * which are members of this array
			 */
			mds = mdstat_read(0, 0);
			for (m=mds; m; m=m->next)
				if (m->metadata_version &&
				    strncmp(m->metadata_version, "external:", 9)==0 &&
				    is_subarray(m->metadata_version+9) &&
				    devname2devnum(m->metadata_version+10) == devnum) {
					if (!quiet)
						fprintf(stderr, Name
							": Cannot stop container %s: "
							"member %s still active\n",
							devname, m->dev);
					free_mdstat(mds);
					if (mdi)
						sysfs_free(mdi);
					return 1;
				}
		}

		/* As we have an O_EXCL open, any use of the device
		 * which blocks STOP_ARRAY is probably a transient use,
		 * so it is reasonable to retry for a while - 5 seconds.
		 */
		count = 25; err = 0;
		while (count && fd >= 0
		       && (err = ioctl(fd, STOP_ARRAY, NULL)) < 0
		       && errno == EBUSY) {
			usleep(200000);
			count --;
		}
		if (fd >= 0 && err) {
			if (quiet == 0) {
				fprintf(stderr, Name
					": failed to stop array %s: %s\n",
					devname, strerror(errno));
				if (errno == EBUSY)
					fprintf(stderr, "Perhaps a running "
						"process, mounted filesystem "
						"or active volume group?\n");
			}
			if (mdi)
				sysfs_free(mdi);
			return 1;
		}
		/* prior to 2.6.28, KOBJ_CHANGE was not sent when an md array
		 * was stopped, so We'll do it here just to be sure.  Drop any
		 * partitions as well...
		 */
		if (fd >= 0)
			ioctl(fd, BLKRRPART, 0);
		if (mdi)
			sysfs_uevent(mdi, "change");

		
		if (devnum != NoMdDev &&
		    (stat("/dev/.udev", &stb) != 0 ||
		     check_env("MDADM_NO_UDEV"))) {
			struct map_ent *mp = map_by_devnum(&map, devnum);
			remove_devices(devnum, mp ? mp->path : NULL);
		}


		if (quiet <= 0)
			fprintf(stderr, Name ": stopped %s\n", devname);
		map_lock(&map);
		map_remove(&map, devnum);
		map_unlock(&map);
	}
	return 0;
}