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mdadm/Detail.c

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/*
* mdadm - manage Linux "md" devices aka RAID arrays.
*
* Copyright (C) 2001-2009 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 "md_p.h"
#include "md_u.h"
#include <dirent.h>
int Detail(char *dev, int brief, int export, int test, char *homehost)
{
/*
* Print out details for an md array by using
* GET_ARRAY_INFO and GET_DISK_INFO ioctl calls
*/
int fd = open(dev, O_RDONLY);
int vers;
mdu_array_info_t array;
mdu_disk_info_t *disks;
int next;
int d;
time_t atime;
char *c;
char *devices = NULL;
int spares = 0;
struct stat stb;
int is_26 = get_linux_version() >= 2006000;
int is_rebuilding = 0;
int failed = 0;
struct supertype *st;
char *subarray = NULL;
int max_disks = MD_SB_DISKS; /* just a default */
struct mdinfo *info = NULL;
struct mdinfo *sra;
char *member = NULL;
char *container = NULL;
int rv = test ? 4 : 1;
int avail_disks = 0;
char *avail;
if (fd < 0) {
fprintf(stderr, Name ": cannot open %s: %s\n",
dev, strerror(errno));
return rv;
}
vers = md_get_version(fd);
if (vers < 0) {
fprintf(stderr, Name ": %s does not appear to be an md device\n",
dev);
close(fd);
return rv;
}
if (vers < 9000) {
fprintf(stderr, Name ": cannot get detail for md device %s: driver version too old.\n",
dev);
close(fd);
return rv;
}
if (ioctl(fd, GET_ARRAY_INFO, &array)<0) {
if (errno == ENODEV)
fprintf(stderr, Name ": md device %s does not appear to be active.\n",
dev);
else
fprintf(stderr, Name ": cannot get array detail for %s: %s\n",
dev, strerror(errno));
close(fd);
return rv;
}
sra = sysfs_read(fd, 0, GET_VERSION);
st = super_by_fd(fd, &subarray);
if (fstat(fd, &stb) != 0 && !S_ISBLK(stb.st_mode))
stb.st_rdev = 0;
rv = 0;
if (st)
max_disks = st->max_devs;
if (subarray) {
/* This is a subarray of some container.
* We want the name of the container, and the member
*/
int dn = st->container_dev;
member = subarray;
container = map_dev(dev2major(dn), dev2minor(dn), 1);
}
/* try to load a superblock */
if (st) for (d = 0; d < max_disks; d++) {
mdu_disk_info_t disk;
char *dv;
int fd2;
int err;
disk.number = d;
if (ioctl(fd, GET_DISK_INFO, &disk) < 0)
continue;
if (d >= array.raid_disks &&
disk.major == 0 &&
disk.minor == 0)
continue;
if (array.raid_disks > 0 &&
(disk.state & (1 << MD_DISK_ACTIVE)) == 0)
continue;
dv = map_dev(disk.major, disk.minor, 1);
if (!dv)
continue;
fd2 = dev_open(dv, O_RDONLY);
if (fd2 < 0)
continue;
if (st->sb)
st->ss->free_super(st);
err = st->ss->load_super(st, fd2, NULL);
close(fd2);
if (err)
continue;
if (info)
free(info);
if (subarray)
info = st->ss->container_content(st, subarray);
else {
info = malloc(sizeof(*info));
st->ss->getinfo_super(st, info, NULL);
}
if (!info)
continue;
if (array.raid_disks != 0 && /* container */
(info->array.ctime != array.ctime ||
info->array.level != array.level)) {
st->ss->free_super(st);
continue;
}
/* some formats (imsm) have free-floating-spares
* with a uuid of uuid_zero, they don't
* have very good info about the rest of the
* container, so keep searching when
* encountering such a device. Otherwise, stop
* after the first successful call to
* ->load_super.
*/
if (memcmp(uuid_zero,
info->uuid,
sizeof(uuid_zero)) == 0) {
st->ss->free_super(st);
continue;
}
break;
}
/* Ok, we have some info to print... */
c = map_num(pers, array.level);
if (export) {
if (array.raid_disks) {
if (c)
printf("MD_LEVEL=%s\n", c);
printf("MD_DEVICES=%d\n", array.raid_disks);
} else {
printf("MD_LEVEL=container\n");
printf("MD_DEVICES=%d\n", array.nr_disks);
}
if (container) {
printf("MD_CONTAINER=%s\n", container);
printf("MD_MEMBER=%s\n", member);
} else {
if (sra && sra->array.major_version < 0)
printf("MD_METADATA=%s\n", sra->text_version);
else
printf("MD_METADATA=%d.%d\n",
array.major_version, array.minor_version);
}
if (st && st->sb && info) {
char nbuf[64];
struct map_ent *mp, *map = NULL;
fname_from_uuid(st, info, nbuf, ':');
printf("MD_UUID=%s\n", nbuf+5);
mp = map_by_uuid(&map, info->uuid);
if (mp && mp->path &&
strncmp(mp->path, "/dev/md/", 8) == 0)
printf("MD_DEVNAME=%s\n", mp->path+8);
if (st->ss->export_detail_super)
st->ss->export_detail_super(st);
} else {
struct map_ent *mp, *map = NULL;
char nbuf[64];
mp = map_by_devnum(&map, fd2devnum(fd));
if (mp) {
__fname_from_uuid(mp->uuid, 0, nbuf, ':');
printf("MD_UUID=%s\n", nbuf+5);
}
if (mp && mp->path &&
strncmp(mp->path, "/dev/md/", 8) == 0)
printf("MD_DEVNAME=%s\n", mp->path+8);
}
goto out;
}
disks = malloc(max_disks * sizeof(mdu_disk_info_t));
for (d=0; d<max_disks; d++) {
disks[d].state = (1<<MD_DISK_REMOVED);
disks[d].major = disks[d].minor = 0;
disks[d].number = disks[d].raid_disk = d;
}
next = array.raid_disks;
for (d=0; d < max_disks; d++) {
mdu_disk_info_t disk;
disk.number = d;
if (ioctl(fd, GET_DISK_INFO, &disk) < 0) {
if (d < array.raid_disks)
fprintf(stderr, Name ": cannot get device detail for device %d: %s\n",
d, strerror(errno));
continue;
}
if (disk.major == 0 && disk.minor == 0)
continue;
if (disk.raid_disk >= 0 && disk.raid_disk < array.raid_disks)
disks[disk.raid_disk] = disk;
else if (next < max_disks)
disks[next++] = disk;
}
avail = calloc(array.raid_disks, 1);
for (d= 0; d < array.raid_disks; d++) {
mdu_disk_info_t disk = disks[d];
if ((disk.state & (1<<MD_DISK_SYNC))) {
avail_disks ++;
avail[d] = 1;
}
}
if (brief) {
mdu_bitmap_file_t bmf;
printf("ARRAY %s", dev);
if (brief > 1) {
if (array.raid_disks)
printf(" level=%s num-devices=%d",
c?c:"-unknown-",
array.raid_disks );
else
printf(" level=container num-devices=%d",
array.nr_disks);
}
if (container) {
printf(" container=%s", container);
printf(" member=%s", member);
} else {
if (sra && sra->array.major_version < 0)
printf(" metadata=%s", sra->text_version);
else
printf(" metadata=%d.%d",
array.major_version, array.minor_version);
}
/* Only try GET_BITMAP_FILE for 0.90.01 and later */
if (vers >= 9001 &&
ioctl(fd, GET_BITMAP_FILE, &bmf) == 0 &&
bmf.pathname[0]) {
printf(" bitmap=%s", bmf.pathname);
}
} else {
mdu_bitmap_file_t bmf;
unsigned long long larray_size;
struct mdstat_ent *ms = mdstat_read(0, 0);
struct mdstat_ent *e;
int devnum = array.md_minor;
if (major(stb.st_rdev) == (unsigned)get_mdp_major())
devnum = -1 - devnum;
for (e=ms; e; e=e->next)
if (e->devnum == devnum)
break;
if (!get_dev_size(fd, NULL, &larray_size))
larray_size = 0;
printf("%s:\n", dev);
if (container)
printf(" Container : %s, member %s\n", container, member);
else {
if (sra && sra->array.major_version < 0)
printf(" Version : %s\n", sra->text_version);
else
printf(" Version : %d.%d\n",
array.major_version, array.minor_version);
}
atime = array.ctime;
if (atime)
printf(" Creation Time : %.24s\n", ctime(&atime));
if (array.raid_disks == 0) c = "container";
printf(" Raid Level : %s\n", c?c:"-unknown-");
if (larray_size)
printf(" Array Size : %llu%s\n", (larray_size>>10), human_size(larray_size));
if (array.level >= 1) {
if (array.major_version != 0 &&
(larray_size >= 0xFFFFFFFFULL|| array.size == 0)) {
unsigned long long dsize = get_component_size(fd);
if (dsize > 0)
printf(" Used Dev Size : %llu%s\n",
dsize/2,
human_size((long long)dsize<<9));
else
printf(" Used Dev Size : unknown\n");
} else
printf(" Used Dev Size : %d%s\n", array.size,
human_size((long long)array.size<<10));
}
if (array.raid_disks)
printf(" Raid Devices : %d\n", array.raid_disks);
printf(" Total Devices : %d\n", array.nr_disks);
if (!container &&
((sra == NULL && array.major_version == 0) ||
(sra && sra->array.major_version == 0)))
printf("Preferred Minor : %d\n", array.md_minor);
if (sra == NULL || sra->array.major_version >= 0)
printf(" Persistence : Superblock is %spersistent\n",
array.not_persistent?"not ":"");
printf("\n");
/* Only try GET_BITMAP_FILE for 0.90.01 and later */
if (vers >= 9001 &&
ioctl(fd, GET_BITMAP_FILE, &bmf) == 0 &&
bmf.pathname[0]) {
printf(" Intent Bitmap : %s\n", bmf.pathname);
printf("\n");
} else if (array.state & (1<<MD_SB_BITMAP_PRESENT))
printf(" Intent Bitmap : Internal\n\n");
atime = array.utime;
if (atime)
printf(" Update Time : %.24s\n", ctime(&atime));
if (array.raid_disks) {
static char *sync_action[] = {", recovering",", resyncing",", reshaping",", checking"};
char *st;
if (avail_disks == array.raid_disks)
st = "";
else if (!enough(array.level, array.raid_disks,
array.layout, 1, avail, avail_disks))
st = ", FAILED";
else
st = ", degraded";
printf(" State : %s%s%s%s\n",
(array.state&(1<<MD_SB_CLEAN))?"clean":"active",
st,
(!e || e->percent < 0) ? "" : sync_action[e->resync],
larray_size ? "": ", Not Started");
}
if (array.raid_disks)
printf(" Active Devices : %d\n", array.active_disks);
printf("Working Devices : %d\n", array.working_disks);
if (array.raid_disks) {
printf(" Failed Devices : %d\n", array.failed_disks);
printf(" Spare Devices : %d\n", array.spare_disks);
}
printf("\n");
if (array.level == 5) {
c = map_num(r5layout, array.layout);
printf(" Layout : %s\n", c?c:"-unknown-");
}
if (array.level == 6) {
c = map_num(r6layout, array.layout);
printf(" Layout : %s\n", c?c:"-unknown-");
}
if (array.level == 10) {
printf(" Layout :");
print_r10_layout(array.layout);
printf("\n");
}
switch (array.level) {
case 0:
case 4:
case 5:
case 10:
case 6:
if (array.chunk_size)
printf(" Chunk Size : %dK\n\n",
array.chunk_size/1024);
break;
case -1:
printf(" Rounding : %dK\n\n", array.chunk_size/1024);
break;
default: break;
}
if (e && e->percent >= 0) {
printf(" Re%s Status : %d%% complete\n",
(st && st->sb && info->reshape_active)?
"shape":"build",
e->percent);
is_rebuilding = 1;
}
free_mdstat(ms);
if (st->sb && info->reshape_active) {
#if 0
This is pretty boring
printf(" Reshape pos'n : %llu%s\n", (unsigned long long) info->reshape_progress<<9,
human_size((unsigned long long)info->reshape_progress<<9));
#endif
if (info->delta_disks > 0)
printf(" Delta Devices : %d, (%d->%d)\n",
info->delta_disks, array.raid_disks - info->delta_disks, array.raid_disks);
if (info->delta_disks < 0)
printf(" Delta Devices : %d, (%d->%d)\n",
info->delta_disks, array.raid_disks, array.raid_disks + info->delta_disks);
if (info->new_level != array.level) {
char *c = map_num(pers, info->new_level);
printf(" New Level : %s\n", c?c:"-unknown-");
}
if (info->new_level != array.level ||
info->new_layout != array.layout) {
if (info->new_level == 5) {
char *c = map_num(r5layout, info->new_layout);
printf(" New Layout : %s\n",
c?c:"-unknown-");
}
if (info->new_level == 6) {
char *c = map_num(r6layout, info->new_layout);
printf(" New Layout : %s\n",
c?c:"-unknown-");
}
if (info->new_level == 10) {
printf(" New Layout : near=%d, %s=%d\n",
info->new_layout&255,
(info->new_layout&0x10000)?"offset":"far",
(info->new_layout>>8)&255);
}
}
if (info->new_chunk != array.chunk_size)
printf(" New Chunksize : %dK\n", info->new_chunk/1024);
printf("\n");
} else if (e && e->percent >= 0)
printf("\n");
if (st && st->sb)
st->ss->detail_super(st, homehost);
if (array.raid_disks == 0 && sra && sra->array.major_version == -1
&& sra->array.minor_version == -2 && sra->text_version[0] != '/') {
/* This looks like a container. Find any active arrays
* That claim to be a member.
*/
DIR *dir = opendir("/sys/block");
struct dirent *de;
printf(" Member Arrays :");
while (dir && (de = readdir(dir)) != NULL) {
char path[200];
char vbuf[1024];
int nlen = strlen(sra->sys_name);
int dn;
if (de->d_name[0] == '.')
continue;
sprintf(path, "/sys/block/%s/md/metadata_version",
de->d_name);
if (load_sys(path, vbuf) < 0)
continue;
if (strncmp(vbuf, "external:", 9) != 0 ||
!is_subarray(vbuf+9) ||
strncmp(vbuf+10, sra->sys_name, nlen) != 0 ||
vbuf[10+nlen] != '/')
continue;
dn = devname2devnum(de->d_name);
printf(" %s", map_dev(dev2major(dn),
dev2minor(dn), 1));
}
if (dir)
closedir(dir);
printf("\n\n");
}
if (array.raid_disks)
printf(" Number Major Minor RaidDevice State\n");
else
printf(" Number Major Minor RaidDevice\n");
}
free(info);
for (d= 0; d < max_disks; d++) {
char *dv;
mdu_disk_info_t disk = disks[d];
if (d >= array.raid_disks &&
disk.major == 0 &&
disk.minor == 0)
continue;
if (!brief) {
if (d == array.raid_disks) printf("\n");
if (disk.raid_disk < 0)
printf(" %5d %5d %5d - ",
disk.number, disk.major, disk.minor);
else
printf(" %5d %5d %5d %5d ",
disk.number, disk.major, disk.minor, disk.raid_disk);
}
if (!brief && array.raid_disks) {
if (disk.state & (1<<MD_DISK_FAULTY)) {
printf(" faulty");
if (disk.raid_disk < array.raid_disks &&
disk.raid_disk >= 0)
failed++;
}
if (disk.state & (1<<MD_DISK_ACTIVE)) printf(" active");
if (disk.state & (1<<MD_DISK_SYNC)) printf(" sync");
if (disk.state & (1<<MD_DISK_REMOVED)) printf(" removed");
if (disk.state & (1<<MD_DISK_WRITEMOSTLY)) printf(" writemostly");
if ((disk.state &
((1<<MD_DISK_ACTIVE)|(1<<MD_DISK_SYNC)|(1<<MD_DISK_REMOVED)))
== 0) {
printf(" spare");
if (is_26) {
if (disk.raid_disk < array.raid_disks && disk.raid_disk >= 0)
printf(" rebuilding");
} else if (is_rebuilding && failed) {
/* Taking a bit of a risk here, we remove the
* device from the array, and then put it back.
* If this fails, we are rebuilding
*/
int err = ioctl(fd, HOT_REMOVE_DISK, makedev(disk.major, disk.minor));
if (err == 0) ioctl(fd, HOT_ADD_DISK, makedev(disk.major, disk.minor));
if (err && errno == EBUSY)
printf(" rebuilding");
}
}
}
if (disk.state == 0) spares++;
if (test && d < array.raid_disks
&& !(disk.state & (1<<MD_DISK_SYNC)))
rv |= 1;
if ((dv=map_dev(disk.major, disk.minor, 0))) {
if (brief) {
if (devices) {
devices = realloc(devices,
strlen(devices)+1+strlen(dv)+1);
strcat(strcat(devices,","),dv);
} else
devices = strdup(dv);
} else
printf(" %s", dv);
}
if (!brief) printf("\n");
}
if (spares && brief && array.raid_disks) printf(" spares=%d", spares);
if (brief && st && st->sb)
st->ss->brief_detail_super(st);
st->ss->free_super(st);
if (brief > 1 && devices) printf("\n devices=%s", devices);
if (brief) printf("\n");
if (test &&
!enough(array.level, array.raid_disks, array.layout,
1, avail, avail_disks))
rv = 2;
free(disks);
out:
close(fd);
free(subarray);
return rv;
}
int Detail_Platform(struct superswitch *ss, int scan, int verbose)
{
/* display platform capabilities for the given metadata format
* 'scan' in this context means iterate over all metadata types
*/
int i;
int err = 1;
if (ss && ss->detail_platform)
err = ss->detail_platform(verbose, 0);
else if (ss) {
if (verbose)
fprintf(stderr, Name ": %s metadata is platform independent\n",
ss->name ? : "[no name]");
} else if (!scan) {
if (verbose)
fprintf(stderr, Name ": specify a metadata type or --scan\n");
}
if (!scan)
return err;
for (i = 0; superlist[i]; i++) {
struct superswitch *meta = superlist[i];
if (meta == ss)
continue;
if (verbose)
fprintf(stderr, Name ": checking metadata %s\n",
meta->name ? : "[no name]");
if (!meta->detail_platform) {
if (verbose)
fprintf(stderr, Name ": %s metadata is platform independent\n",
meta->name ? : "[no name]");
} else
err |= meta->detail_platform(verbose, 0);
}
return err;
}
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