]> git.neil.brown.name Git - mdadm.git/blob - Detail.c
Fix memory leak
[mdadm.git] / Detail.c
1 /*
2  * mdadm - manage Linux "md" devices aka RAID arrays.
3  *
4  * Copyright (C) 2001-2009 Neil Brown <neilb@suse.de>
5  *
6  *
7  *    This program is free software; you can redistribute it and/or modify
8  *    it under the terms of the GNU General Public License as published by
9  *    the Free Software Foundation; either version 2 of the License, or
10  *    (at your option) any later version.
11  *
12  *    This program is distributed in the hope that it will be useful,
13  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
14  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15  *    GNU General Public License for more details.
16  *
17  *    You should have received a copy of the GNU General Public License
18  *    along with this program; if not, write to the Free Software
19  *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
20  *
21  *    Author: Neil Brown
22  *    Email: <neilb@suse.de>
23  */
24
25 #include        "mdadm.h"
26 #include        "md_p.h"
27 #include        "md_u.h"
28 #include        <dirent.h>
29
30 int Detail(char *dev, int brief, int export, int test, char *homehost)
31 {
32         /*
33          * Print out details for an md array by using
34          * GET_ARRAY_INFO and GET_DISK_INFO ioctl calls
35          */
36
37         int fd = open(dev, O_RDONLY);
38         int vers;
39         mdu_array_info_t array;
40         mdu_disk_info_t *disks;
41         int next;
42         int d;
43         time_t atime;
44         char *c;
45         char *devices = NULL;
46         int spares = 0;
47         struct stat stb;
48         int is_26 = get_linux_version() >= 2006000;
49         int is_rebuilding = 0;
50         int failed = 0;
51         struct supertype *st;
52         char *subarray = NULL;
53         int max_disks = MD_SB_DISKS; /* just a default */
54         struct mdinfo *info = NULL;
55         struct mdinfo *sra;
56         char *member = NULL;
57         char *container = NULL;
58
59         int rv = test ? 4 : 1;
60         int avail_disks = 0;
61         char *avail;
62
63         if (fd < 0) {
64                 fprintf(stderr, Name ": cannot open %s: %s\n",
65                         dev, strerror(errno));
66                 return rv;
67         }
68         vers = md_get_version(fd);
69         if (vers < 0) {
70                 fprintf(stderr, Name ": %s does not appear to be an md device\n",
71                         dev);
72                 close(fd);
73                 return rv;
74         }
75         if (vers < 9000) {
76                 fprintf(stderr, Name ": cannot get detail for md device %s: driver version too old.\n",
77                         dev);
78                 close(fd);
79                 return rv;
80         }
81         if (ioctl(fd, GET_ARRAY_INFO, &array)<0) {
82                 if (errno == ENODEV)
83                         fprintf(stderr, Name ": md device %s does not appear to be active.\n",
84                                 dev);
85                 else
86                         fprintf(stderr, Name ": cannot get array detail for %s: %s\n",
87                                 dev, strerror(errno));
88                 close(fd);
89                 return rv;
90         }
91         sra = sysfs_read(fd, 0, GET_VERSION);
92         st = super_by_fd(fd, &subarray);
93
94         if (fstat(fd, &stb) != 0 && !S_ISBLK(stb.st_mode))
95                 stb.st_rdev = 0;
96         rv = 0;
97
98         if (st)
99                 max_disks = st->max_devs;
100
101         if (subarray) {
102                 /* This is a subarray of some container.
103                  * We want the name of the container, and the member
104                  */
105                 int dn = st->container_dev;
106
107                 member = subarray;
108                 container = map_dev(dev2major(dn), dev2minor(dn), 1);
109         }
110
111         /* try to load a superblock */
112         if (st) for (d = 0; d < max_disks; d++) {
113                 mdu_disk_info_t disk;
114                 char *dv;
115                 int fd2;
116                 int err;
117                 disk.number = d;
118                 if (ioctl(fd, GET_DISK_INFO, &disk) < 0)
119                         continue;
120                 if (d >= array.raid_disks &&
121                     disk.major == 0 &&
122                     disk.minor == 0)
123                         continue;
124
125                 if (array.raid_disks > 0 &&
126                     (disk.state & (1 << MD_DISK_ACTIVE)) == 0)
127                         continue;
128
129                 dv = map_dev(disk.major, disk.minor, 1);
130                 if (!dv)
131                         continue;
132
133                 fd2 = dev_open(dv, O_RDONLY);
134                 if (fd2 < 0)
135                         continue;
136
137                 if (st->sb)
138                         st->ss->free_super(st);
139
140                 err = st->ss->load_super(st, fd2, NULL);
141                 close(fd2);
142                 if (err)
143                         continue;
144                 if (info)
145                         free(info);
146                 if (subarray)
147                         info = st->ss->container_content(st, subarray);
148                 else {
149                         info = malloc(sizeof(*info));
150                         st->ss->getinfo_super(st, info, NULL);
151                 }
152                 if (!info)
153                         continue;
154
155                 if (array.raid_disks != 0 && /* container */
156                     (info->array.ctime != array.ctime ||
157                      info->array.level != array.level)) {
158                         st->ss->free_super(st);
159                         continue;
160                 }
161                 /* some formats (imsm) have free-floating-spares
162                  * with a uuid of uuid_zero, they don't
163                  * have very good info about the rest of the
164                  * container, so keep searching when
165                  * encountering such a device.  Otherwise, stop
166                  * after the first successful call to
167                  * ->load_super.
168                  */
169                 if (memcmp(uuid_zero,
170                            info->uuid,
171                            sizeof(uuid_zero)) == 0) {
172                         st->ss->free_super(st);
173                         continue;
174                 }
175                 break;
176         }
177
178         /* Ok, we have some info to print... */
179         c = map_num(pers, array.level);
180
181         if (export) {
182                 if (array.raid_disks) {
183                         if (c)
184                                 printf("MD_LEVEL=%s\n", c);
185                         printf("MD_DEVICES=%d\n", array.raid_disks);
186                 } else {
187                         printf("MD_LEVEL=container\n");
188                         printf("MD_DEVICES=%d\n", array.nr_disks);
189                 }
190                 if (container) {
191                         printf("MD_CONTAINER=%s\n", container);
192                         printf("MD_MEMBER=%s\n", member);
193                 } else {
194                         if (sra && sra->array.major_version < 0)
195                                 printf("MD_METADATA=%s\n", sra->text_version);
196                         else
197                                 printf("MD_METADATA=%d.%d\n",
198                                        array.major_version, array.minor_version);
199                 }
200                 
201                 if (st && st->sb && info) {
202                         char nbuf[64];
203                         struct map_ent *mp, *map = NULL;
204
205                         fname_from_uuid(st, info, nbuf, ':');
206                         printf("MD_UUID=%s\n", nbuf+5);
207                         mp = map_by_uuid(&map, info->uuid);
208                         if (mp && mp->path &&
209                             strncmp(mp->path, "/dev/md/", 8) == 0)
210                                 printf("MD_DEVNAME=%s\n", mp->path+8);
211
212                         if (st->ss->export_detail_super)
213                                 st->ss->export_detail_super(st);
214                 } else {
215                         struct map_ent *mp, *map = NULL;
216                         char nbuf[64];
217                         mp = map_by_devnum(&map, fd2devnum(fd));
218                         if (mp) {
219                                 __fname_from_uuid(mp->uuid, 0, nbuf, ':');
220                                 printf("MD_UUID=%s\n", nbuf+5);
221                         }
222                         if (mp && mp->path &&
223                             strncmp(mp->path, "/dev/md/", 8) == 0)
224                                 printf("MD_DEVNAME=%s\n", mp->path+8);
225                 }
226                 goto out;
227         }
228
229         disks = malloc(max_disks * sizeof(mdu_disk_info_t));
230         for (d=0; d<max_disks; d++) {
231                 disks[d].state = (1<<MD_DISK_REMOVED);
232                 disks[d].major = disks[d].minor = 0;
233                 disks[d].number = disks[d].raid_disk = d;
234         }
235
236         next = array.raid_disks;
237         for (d=0; d < max_disks; d++) {
238                 mdu_disk_info_t disk;
239                 disk.number = d;
240                 if (ioctl(fd, GET_DISK_INFO, &disk) < 0) {
241                         if (d < array.raid_disks)
242                                 fprintf(stderr, Name ": cannot get device detail for device %d: %s\n",
243                                         d, strerror(errno));
244                         continue;
245                 }
246                 if (disk.major == 0 && disk.minor == 0)
247                         continue;
248                 if (disk.raid_disk >= 0 && disk.raid_disk < array.raid_disks)
249                         disks[disk.raid_disk] = disk;
250                 else if (next < max_disks)
251                         disks[next++] = disk;
252         }
253
254         avail = calloc(array.raid_disks, 1);
255
256         for (d= 0; d < array.raid_disks; d++) {
257                 mdu_disk_info_t disk = disks[d];
258
259                 if ((disk.state & (1<<MD_DISK_SYNC))) {
260                         avail_disks ++;
261                         avail[d] = 1;
262                 }
263         }
264
265         if (brief) {
266                 mdu_bitmap_file_t bmf;
267                 printf("ARRAY %s", dev);
268                 if (brief > 1) {
269                         if (array.raid_disks)
270                                 printf(" level=%s num-devices=%d",
271                                        c?c:"-unknown-",
272                                        array.raid_disks );
273                         else
274                                 printf(" level=container num-devices=%d",
275                                        array.nr_disks);
276                 }
277                 if (container) {
278                         printf(" container=%s", container);
279                         printf(" member=%s", member);
280                 } else {
281                         if (sra && sra->array.major_version < 0)
282                                 printf(" metadata=%s", sra->text_version);
283                         else
284                                 printf(" metadata=%d.%d",
285                                        array.major_version, array.minor_version);
286                 }
287
288                 /* Only try GET_BITMAP_FILE for 0.90.01 and later */
289                 if (vers >= 9001 &&
290                     ioctl(fd, GET_BITMAP_FILE, &bmf) == 0 &&
291                     bmf.pathname[0]) {
292                         printf(" bitmap=%s", bmf.pathname);
293                 }
294         } else {
295                 mdu_bitmap_file_t bmf;
296                 unsigned long long larray_size;
297                 struct mdstat_ent *ms = mdstat_read(0, 0);
298                 struct mdstat_ent *e;
299                 int devnum = array.md_minor;
300                 if (major(stb.st_rdev) == (unsigned)get_mdp_major())
301                         devnum = -1 - devnum;
302
303                 for (e=ms; e; e=e->next)
304                         if (e->devnum == devnum)
305                                 break;
306                 if (!get_dev_size(fd, NULL, &larray_size))
307                         larray_size = 0;
308
309                 printf("%s:\n", dev);
310
311                 if (container)
312                         printf("      Container : %s, member %s\n", container, member);
313                 else {
314                 if (sra && sra->array.major_version < 0)
315                         printf("        Version : %s\n", sra->text_version);
316                 else
317                         printf("        Version : %d.%d\n",
318                                array.major_version, array.minor_version);
319                 }
320
321                 atime = array.ctime;
322                 if (atime)
323                         printf("  Creation Time : %.24s\n", ctime(&atime));
324                 if (array.raid_disks == 0) c = "container";
325                 printf("     Raid Level : %s\n", c?c:"-unknown-");
326                 if (larray_size)
327                         printf("     Array Size : %llu%s\n", (larray_size>>10), human_size(larray_size));
328                 if (array.level >= 1) {
329                         if (array.major_version != 0 &&
330                             (larray_size >= 0xFFFFFFFFULL|| array.size == 0)) {
331                                 unsigned long long dsize = get_component_size(fd);
332                                 if (dsize > 0)
333                                         printf("  Used Dev Size : %llu%s\n",
334                                                dsize/2,
335                                          human_size((long long)dsize<<9));
336                                 else
337                                         printf("  Used Dev Size : unknown\n");
338                         } else
339                                 printf("  Used Dev Size : %d%s\n", array.size,
340                                        human_size((long long)array.size<<10));
341                 }
342                 if (array.raid_disks)
343                         printf("   Raid Devices : %d\n", array.raid_disks);
344                 printf("  Total Devices : %d\n", array.nr_disks);
345                 if (!container && 
346                     ((sra == NULL && array.major_version == 0) ||
347                      (sra && sra->array.major_version == 0)))
348                         printf("Preferred Minor : %d\n", array.md_minor);
349                 if (sra == NULL || sra->array.major_version >= 0)
350                         printf("    Persistence : Superblock is %spersistent\n",
351                                array.not_persistent?"not ":"");
352                 printf("\n");
353                 /* Only try GET_BITMAP_FILE for 0.90.01 and later */
354                 if (vers >= 9001 &&
355                     ioctl(fd, GET_BITMAP_FILE, &bmf) == 0 &&
356                     bmf.pathname[0]) {
357                         printf("  Intent Bitmap : %s\n", bmf.pathname);
358                         printf("\n");
359                 } else if (array.state & (1<<MD_SB_BITMAP_PRESENT))
360                         printf("  Intent Bitmap : Internal\n\n");
361                 atime = array.utime;
362                 if (atime)
363                         printf("    Update Time : %.24s\n", ctime(&atime));
364                 if (array.raid_disks) {
365                         static char *sync_action[] = {", recovering",", resyncing",", reshaping",", checking"};
366                         char *st;
367                         if (avail_disks == array.raid_disks)
368                                 st = "";
369                         else if (!enough(array.level, array.raid_disks,
370                                          array.layout, 1, avail, avail_disks))
371                                 st = ", FAILED";
372                         else
373                                 st = ", degraded";
374
375                         printf("          State : %s%s%s%s%s%s \n",
376                                (array.state&(1<<MD_SB_CLEAN))?"clean":"active", st,
377                                (!e || (e->percent < 0 && e->percent != PROCESS_PENDING &&
378                                e->percent != PROCESS_DELAYED)) ? "" : sync_action[e->resync],
379                                larray_size ? "": ", Not Started",
380                                e->percent == PROCESS_DELAYED ? " (DELAYED)": "",
381                                e->percent == PROCESS_PENDING ? " (PENDING)": "");
382                 }
383                 if (array.raid_disks)
384                         printf(" Active Devices : %d\n", array.active_disks);
385                 printf("Working Devices : %d\n", array.working_disks);
386                 if (array.raid_disks) {
387                         printf(" Failed Devices : %d\n", array.failed_disks);
388                         printf("  Spare Devices : %d\n", array.spare_disks);
389                 }
390                 printf("\n");
391                 if (array.level == 5) {
392                         c = map_num(r5layout, array.layout);
393                         printf("         Layout : %s\n", c?c:"-unknown-");
394                 }
395                 if (array.level == 6) {
396                         c = map_num(r6layout, array.layout);
397                         printf("         Layout : %s\n", c?c:"-unknown-");
398                 }
399                 if (array.level == 10) {
400                         printf("         Layout :");
401                         print_r10_layout(array.layout);
402                         printf("\n");
403                 }
404                 switch (array.level) {
405                 case 0:
406                 case 4:
407                 case 5:
408                 case 10:
409                 case 6:
410                         if (array.chunk_size)
411                                 printf("     Chunk Size : %dK\n\n",
412                                        array.chunk_size/1024);
413                         break;
414                 case -1:
415                         printf("       Rounding : %dK\n\n", array.chunk_size/1024);
416                         break;
417                 default: break;
418                 }
419
420                 if (e && e->percent >= 0) {
421                         static char *sync_action[] = {"Rebuild", "Resync", "Reshape", "Check"};
422                         printf(" %7s Status : %d%% complete\n", sync_action[e->resync], e->percent);
423                         is_rebuilding = 1;
424                 }
425                 free_mdstat(ms);
426
427                 if (st->sb && info->reshape_active) {
428 #if 0
429 This is pretty boring
430                         printf("  Reshape pos'n : %llu%s\n", (unsigned long long) info->reshape_progress<<9,
431                                human_size((unsigned long long)info->reshape_progress<<9));
432 #endif
433                         if (info->delta_disks != 0)
434                                 printf("  Delta Devices : %d, (%d->%d)\n",
435                                        info->delta_disks, array.raid_disks - info->delta_disks, array.raid_disks);
436                         if (info->new_level != array.level) {
437                                 char *c = map_num(pers, info->new_level);
438                                 printf("      New Level : %s\n", c?c:"-unknown-");
439                         }
440                         if (info->new_level != array.level ||
441                             info->new_layout != array.layout) {
442                                 if (info->new_level == 5) {
443                                         char *c = map_num(r5layout, info->new_layout);
444                                         printf("     New Layout : %s\n",
445                                                c?c:"-unknown-");
446                                 }
447                                 if (info->new_level == 6) {
448                                         char *c = map_num(r6layout, info->new_layout);
449                                         printf("     New Layout : %s\n",
450                                                c?c:"-unknown-");
451                                 }
452                                 if (info->new_level == 10) {
453                                         printf("     New Layout : near=%d, %s=%d\n",
454                                                info->new_layout&255,
455                                                (info->new_layout&0x10000)?"offset":"far",
456                                                (info->new_layout>>8)&255);
457                                 }
458                         }
459                         if (info->new_chunk != array.chunk_size)
460                                 printf("  New Chunksize : %dK\n", info->new_chunk/1024);
461                         printf("\n");
462                 } else if (e && e->percent >= 0)
463                         printf("\n");
464                 if (st && st->sb)
465                         st->ss->detail_super(st, homehost);
466
467                 if (array.raid_disks == 0 && sra && sra->array.major_version == -1
468                     && sra->array.minor_version == -2 && sra->text_version[0] != '/') {
469                         /* This looks like a container.  Find any active arrays
470                          * That claim to be a member.
471                          */
472                         DIR *dir = opendir("/sys/block");
473                         struct dirent *de;
474
475                         printf("  Member Arrays :");
476
477                         while (dir && (de = readdir(dir)) != NULL) {
478                                 char path[200];
479                                 char vbuf[1024];
480                                 int nlen = strlen(sra->sys_name);
481                                 int dn;
482                                 if (de->d_name[0] == '.')
483                                         continue;
484                                 sprintf(path, "/sys/block/%s/md/metadata_version",
485                                         de->d_name);
486                                 if (load_sys(path, vbuf) < 0)
487                                         continue;
488                                 if (strncmp(vbuf, "external:", 9) != 0 ||
489                                     !is_subarray(vbuf+9) ||
490                                     strncmp(vbuf+10, sra->sys_name, nlen) != 0 ||
491                                     vbuf[10+nlen] != '/')
492                                         continue;
493                                 dn = devname2devnum(de->d_name);
494                                 printf(" %s", map_dev(dev2major(dn),
495                                                       dev2minor(dn), 1));
496                         }
497                         if (dir)
498                                 closedir(dir);
499                         printf("\n\n");
500                 }
501
502                 if (array.raid_disks)
503                         printf("    Number   Major   Minor   RaidDevice State\n");
504                 else
505                         printf("    Number   Major   Minor   RaidDevice\n");
506         }
507         free(info);
508
509         for (d= 0; d < max_disks; d++) {
510                 char *dv;
511                 mdu_disk_info_t disk = disks[d];
512
513                 if (d >= array.raid_disks &&
514                     disk.major == 0 &&
515                     disk.minor == 0)
516                         continue;
517                 if (!brief) {
518                         if (d == array.raid_disks) printf("\n");
519                         if (disk.raid_disk < 0)
520                                 printf("   %5d   %5d    %5d        -     ",
521                                        disk.number, disk.major, disk.minor);
522                         else
523                                 printf("   %5d   %5d    %5d    %5d     ",
524                                        disk.number, disk.major, disk.minor, disk.raid_disk);
525                 }
526                 if (!brief && array.raid_disks) {
527
528                         if (disk.state & (1<<MD_DISK_FAULTY)) {
529                                 printf(" faulty");
530                                 if (disk.raid_disk < array.raid_disks &&
531                                     disk.raid_disk >= 0)
532                                         failed++;
533                         }
534                         if (disk.state & (1<<MD_DISK_ACTIVE)) printf(" active");
535                         if (disk.state & (1<<MD_DISK_SYNC)) printf(" sync");
536                         if (disk.state & (1<<MD_DISK_REMOVED)) printf(" removed");
537                         if (disk.state & (1<<MD_DISK_WRITEMOSTLY)) printf(" writemostly");
538                         if ((disk.state &
539                              ((1<<MD_DISK_ACTIVE)|(1<<MD_DISK_SYNC)|(1<<MD_DISK_REMOVED)))
540                             == 0) {
541                                 printf(" spare");
542                                 if (is_26) {
543                                         if (disk.raid_disk < array.raid_disks && disk.raid_disk >= 0)
544                                                 printf(" rebuilding");
545                                 } else if (is_rebuilding && failed) {
546                                         /* Taking a bit of a risk here, we remove the
547                                          * device from the array, and then put it back.
548                                          * If this fails, we are rebuilding
549                                          */
550                                         int err = ioctl(fd, HOT_REMOVE_DISK, makedev(disk.major, disk.minor));
551                                         if (err == 0) ioctl(fd, HOT_ADD_DISK, makedev(disk.major, disk.minor));
552                                         if (err && errno ==  EBUSY)
553                                                 printf(" rebuilding");
554                                 }
555                         }
556                 }
557                 if (disk.state == 0) spares++;
558                 if (test && d < array.raid_disks
559                     && !(disk.state & (1<<MD_DISK_SYNC)))
560                         rv |= 1;
561                 if ((dv=map_dev(disk.major, disk.minor, 0))) {
562                         if (brief) {
563                                 if (devices) {
564                                         devices = realloc(devices,
565                                                           strlen(devices)+1+strlen(dv)+1);
566                                         strcat(strcat(devices,","),dv);
567                                 } else
568                                         devices = strdup(dv);
569                         } else
570                                 printf("   %s", dv);
571                 }
572                 if (!brief) printf("\n");
573         }
574         if (spares && brief && array.raid_disks) printf(" spares=%d", spares);
575         if (brief && st && st->sb)
576                 st->ss->brief_detail_super(st);
577         st->ss->free_super(st);
578
579         if (brief > 1 && devices) printf("\n   devices=%s", devices);
580         if (brief) printf("\n");
581         if (test &&
582             !enough(array.level, array.raid_disks, array.layout,
583                     1, avail, avail_disks))
584                 rv = 2;
585
586         free(disks);
587 out:
588         close(fd);
589         free(subarray);
590         sysfs_free(sra);
591         return rv;
592 }
593
594 int Detail_Platform(struct superswitch *ss, int scan, int verbose)
595 {
596         /* display platform capabilities for the given metadata format
597          * 'scan' in this context means iterate over all metadata types
598          */
599         int i;
600         int err = 1;
601
602         if (ss && ss->detail_platform)
603                 err = ss->detail_platform(verbose, 0);
604         else if (ss) {
605                 if (verbose)
606                         fprintf(stderr, Name ": %s metadata is platform independent\n",
607                                 ss->name ? : "[no name]");
608         } else if (!scan) {
609                 if (verbose)
610                         fprintf(stderr, Name ": specify a metadata type or --scan\n");
611         }
612
613         if (!scan)
614                 return err;
615
616         for (i = 0; superlist[i]; i++) {
617                 struct superswitch *meta = superlist[i];
618
619                 if (meta == ss)
620                         continue;
621                 if (verbose)
622                         fprintf(stderr, Name ": checking metadata %s\n",
623                                 meta->name ? : "[no name]");
624                 if (!meta->detail_platform) {
625                         if (verbose)
626                                 fprintf(stderr, Name ": %s metadata is platform independent\n",
627                                         meta->name ? : "[no name]");
628                 } else
629                         err |= meta->detail_platform(verbose, 0);
630         }
631
632         return err;
633 }