void RebuildMap(void) { struct mdstat_ent *mdstat = mdstat_read(0, 0); struct mdstat_ent *md; struct map_ent *map = NULL; int require_homehost; char sys_hostname[256]; char *homehost = conf_get_homehost(&require_homehost); if (homehost == NULL || strcmp(homehost, "<system>")==0) { if (gethostname(sys_hostname, sizeof(sys_hostname)) == 0) { sys_hostname[sizeof(sys_hostname)-1] = 0; homehost = sys_hostname; } } for (md = mdstat ; md ; md = md->next) { struct mdinfo *sra = sysfs_read(-1, md->devnm, GET_DEVS); struct mdinfo *sd; if (!sra) continue; for (sd = sra->devs ; sd ; sd = sd->next) { char namebuf[100]; char dn[30]; int dfd; int ok; int devid; struct supertype *st; char *subarray = NULL; char *path; struct mdinfo *info; sprintf(dn, "%d:%d", sd->disk.major, sd->disk.minor); dfd = dev_open(dn, O_RDONLY); if (dfd < 0) continue; st = guess_super(dfd); if ( st == NULL) ok = -1; else { subarray = get_member_info(md); ok = st->ss->load_super(st, dfd, NULL); } close(dfd); if (ok != 0) continue; if (subarray) info = st->ss->container_content(st, subarray); else { info = xmalloc(sizeof(*info)); st->ss->getinfo_super(st, info, NULL); } if (!info) continue; devid = devnm2devid(md->devnm); path = map_dev(major(devid), minor(devid), 0); if (path == NULL || strncmp(path, "/dev/md/", 8) != 0) { /* We would really like a name that provides * an MD_DEVNAME for udev. * The name needs to be unique both in /dev/md/ * and in this mapfile. * It needs to match what -I or -As would come * up with. * That means: * Check if array is in mdadm.conf * - if so use that. * determine trustworthy from homehost etc * find a unique name based on metadata name. * */ struct mddev_ident *match = conf_match(st, info, NULL, 0, NULL); struct stat stb; if (match && match->devname && match->devname[0] == '/') { path = match->devname; if (path[0] != '/') { strcpy(namebuf, "/dev/md/"); strcat(namebuf, path); path = namebuf; } } else { int unum = 0; char *sep = "_"; const char *name; int conflict = 1; if ((homehost == NULL || st->ss->match_home(st, homehost) != 1) && st->ss->match_home(st, "any") != 1 && (require_homehost || ! conf_name_is_free(info->name))) /* require a numeric suffix */ unum = 0; else /* allow name to be used as-is if no conflict */ unum = -1; name = info->name; if (!*name) { name = st->ss->name; if (!isdigit(name[strlen(name)-1]) && unum == -1) { unum = 0; sep = ""; } } if (strchr(name, ':')) { /* Probably a uniquifying * hostname prefix. Allow * without a suffix, and strip * hostname if it is us. */ if (homehost && unum == -1 && strncmp(name, homehost, strlen(homehost)) == 0 && name[strlen(homehost)] == ':') name += strlen(homehost)+1; unum = -1; } while (conflict) { if (unum >= 0) sprintf(namebuf, "/dev/md/%s%s%d", name, sep, unum); else sprintf(namebuf, "/dev/md/%s", name); unum++; if (lstat(namebuf, &stb) != 0 && (map == NULL || !map_by_name(&map, namebuf+8))) conflict = 0; } path = namebuf; } } map_add(&map, md->devnm, info->text_version, info->uuid, path); st->ss->free_super(st); free(info); break; } sysfs_free(sra); } /* Only trigger a change if we wrote a new map file */ if (map_write(map)) for (md = mdstat ; md ; md = md->next) { struct mdinfo *sra = sysfs_read(-1, md->devnm, GET_VERSION); if (sra) sysfs_uevent(sra, "change"); sysfs_free(sra); } map_free(map); free_mdstat(mdstat); }
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, ¶m)) { 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; }