diff options
Diffstat (limited to 'Examine.c')
| -rw-r--r-- | Examine.c | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/Examine.c b/Examine.c new file mode 100644 index 0000000..c9605a6 --- /dev/null +++ b/Examine.c @@ -0,0 +1,228 @@ +/* + * mdadm - manage Linux "md" devices aka RAID arrays. + * + * Copyright (C) 2001-2013 Neil Brown <neilb@suse.de> + * + * + * 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 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + * + * Author: Neil Brown + * Email: <neilb@suse.de> + */ + +#include "mdadm.h" +#include "dlink.h" + +#if ! defined(__BIG_ENDIAN) && ! defined(__LITTLE_ENDIAN) +#error no endian defined +#endif +#include "md_u.h" +#include "md_p.h" +int Examine(struct mddev_dev *devlist, + struct context *c, + struct supertype *forcest) +{ + + /* Read the raid superblock from a device and + * display important content. + * + * If cannot be found, print reason: too small, bad magic + * + * Print: + * version, ctime, level, size, raid+spare+ + * prefered minor + * uuid + * + * utime, state etc + * + * If (brief) gather devices for same array and just print a mdadm.conf + * line including devices= + * if devlist==NULL, use conf_get_devs() + */ + int fd; + int rv = 0; + + struct array { + struct supertype *st; + struct mdinfo info; + void *devs; + struct array *next; + int spares; + } *arrays = NULL; + + for (; devlist ; devlist = devlist->next) { + struct supertype *st; + int have_container = 0; + int err = 0; + int container = 0; + + fd = dev_open(devlist->devname, O_RDONLY); + if (fd < 0) { + if (!c->scan) { + pr_err("cannot open %s: %s\n", + devlist->devname, strerror(errno)); + rv = 1; + } + continue; + } + + if (forcest) + st = dup_super(forcest); + else if (must_be_container(fd)) { + /* might be a container */ + st = super_by_fd(fd, NULL); + container = 1; + } else + st = guess_super(fd); + if (st) { + err = 1; + st->ignore_hw_compat = 1; + if (!container) + err = st->ss->load_super(st, fd, + (c->brief||c->scan) ? NULL + :devlist->devname); + if (err && st->ss->load_container) { + err = st->ss->load_container(st, fd, + (c->brief||c->scan) ? NULL + :devlist->devname); + if (!err) + have_container = 1; + } + st->ignore_hw_compat = 0; + } else { + if (!c->brief) { + pr_err("No md superblock detected on %s.\n", devlist->devname); + rv = 1; + } + err = 1; + } + close(fd); + + if (err) { + if (st) + st->ss->free_super(st); + continue; + } + + if (c->SparcAdjust) + st->ss->update_super(st, NULL, UOPT_SPARC22, + devlist->devname, 0, 0, NULL); + /* Ok, its good enough to try, though the checksum could be wrong */ + + if (c->brief && st->ss->brief_examine_super == NULL) { + if (!c->scan) + pr_err("No brief listing for %s on %s\n", + st->ss->name, devlist->devname); + } else if (c->brief) { + struct array *ap; + char *d; + for (ap = arrays; ap; ap = ap->next) { + if (st->ss == ap->st->ss && + st->ss->compare_super(ap->st, st, 0) == 0) + break; + } + if (!ap) { + ap = xmalloc(sizeof(*ap)); + ap->devs = dl_head(); + ap->next = arrays; + ap->spares = 0; + ap->st = st; + arrays = ap; + st->ss->getinfo_super(st, &ap->info, NULL); + } else + st->ss->getinfo_super(st, &ap->info, NULL); + if (!have_container && + !(ap->info.disk.state & (1<<MD_DISK_SYNC))) + ap->spares++; + d = dl_strdup(devlist->devname); + dl_add(ap->devs, d); + } else if (c->export) { + if (st->ss->export_examine_super) + st->ss->export_examine_super(st); + st->ss->free_super(st); + } else { + printf("%s:\n",devlist->devname); + st->ss->examine_super(st, c->homehost); + st->ss->free_super(st); + } + } + if (c->brief) { + struct array *ap; + for (ap = arrays; ap; ap = ap->next) { + char sep='='; + char *d; + int newline = 0; + + ap->st->ss->brief_examine_super(ap->st, c->verbose > 0); + if (ap->spares && !ap->st->ss->external) + newline += printf(" spares=%d", ap->spares); + if (c->verbose > 0) { + newline += printf(" devices"); + for (d = dl_next(ap->devs); + d != ap->devs; + d=dl_next(d)) { + printf("%c%s", sep, d); + sep=','; + } + } + if (ap->st->ss->brief_examine_subarrays) { + if (newline) + printf("\n"); + ap->st->ss->brief_examine_subarrays(ap->st, c->verbose); + } + ap->st->ss->free_super(ap->st); + /* FIXME free ap */ + if (ap->spares || c->verbose > 0) + printf("\n"); + } + } + return rv; +} + +int ExamineBadblocks(char *devname, int brief, struct supertype *forcest) +{ + int fd = dev_open(devname, O_RDONLY); + struct supertype *st = forcest; + int err = 1; + + if (fd < 0) { + pr_err("cannot open %s: %s\n", devname, strerror(errno)); + return 1; + } + if (!st) + st = guess_super(fd); + if (!st) { + if (!brief) + pr_err("No md superblock detected on %s\n", devname); + goto out; + } + if (!st->ss->examine_badblocks) { + pr_err("%s metadata does not support badblocks\n", st->ss->name); + goto out; + } + err = st->ss->load_super(st, fd, brief ? NULL : devname); + if (err) + goto out; + err = st->ss->examine_badblocks(st, fd, devname); + +out: + if (fd >= 0) + close(fd); + if (st) { + st->ss->free_super(st); + free(st); + } + return err; +} |