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mdadm/mdadm.c

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/*
* mdadm - manage Linux "md" devices aka RAID arrays.
*
* Copyright (C) 2001-2002 Neil Brown <neilb@cse.unsw.edu.au>
*
*
* 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@cse.unsw.edu.au>
* Paper: Neil Brown
* School of Computer Science and Engineering
* The University of New South Wales
* Sydney, 2052
* Australia
*/
#include "mdadm.h"
#include "md_p.h"
int open_mddev(char *dev)
{
int mdfd = open(dev, O_RDWR, 0);
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;
}
int main(int argc, char *argv[])
{
int mode = 0;
int opt;
int option_index;
char *help_text;
char *c;
int rv;
int chunk = 0;
int size = 0;
int level = -10;
int layout = -1;
int raiddisks = 0;
int sparedisks = 0;
struct mddev_ident_s ident;
char *configfile = NULL;
char *cp;
int scan = 0;
char devmode = 0;
int runstop = 0;
int readonly = 0;
mddev_dev_t devlist = NULL;
mddev_dev_t *devlistend = & devlist;
mddev_dev_t dv;
int devs_found = 0;
int verbose = 0;
int brief = 0;
int force = 0;
char *mailaddr = NULL;
char *program = NULL;
int delay = 0;
int mdfd = -1;
ident.uuid_set=0;
ident.level = -10;
ident.raid_disks = -1;
ident.super_minor= -1;
ident.devices=0;
while ((option_index = -1) ,
(opt=getopt_long(argc, argv,
short_options, long_options,
&option_index)) != -1) {
int newmode = mode;
/* firstly, so mode-independant options */
switch(opt) {
case 'h':
help_text = Help;
switch (mode) {
case ASSEMBLE : help_text = Help_assemble; break;
case BUILD : help_text = Help_build; break;
case CREATE : help_text = Help_create; break;
case MANAGE : help_text = Help_manage; break;
case MISC : help_text = Help_misc; break;
case MONITOR : help_text = Help_monitor; break;
}
fputs(help_text,stderr);
exit(0);
case 'V':
fputs(Version, stderr);
exit(0);
case 'v': verbose = 1;
continue;
case 'b': brief = 1;
continue;
case ':':
case '?':
fputs(Usage, stderr);
exit(2);
}
/* second, figure out the mode.
* Some options force the mode. Others
* set the mode if it isn't already
*/
switch(opt) {
case '@': /* just incase they say --manage */
newmode = MANAGE; break;
case 'a':
case 'r':
case 'f':
case 1 : if (!mode) newmode = MANAGE; break;
case 'A': newmode = ASSEMBLE; break;
case 'B': newmode = BUILD; break;
case 'C': newmode = CREATE; break;
case 'F': newmode = MONITOR;break;
case '#':
case 'D':
case 'E':
case 'Q': newmode = MISC; break;
case 'R':
case 'S':
case 'o':
case 'w':
case 'K': if (!mode) newmode = MISC; break;
}
if (mode && newmode == mode) {
/* everybody happy ! */
} else if (mode && newmode != mode) {
/* not allowed.. */
fprintf(stderr, Name ": ");
if (option_index >= 0)
fprintf(stderr, "--%s", long_options[option_index].name);
else
fprintf(stderr, "-%c", opt);
fprintf(stderr, " would set mode to %s, but it is already %s.\n",
map_num(modes, newmode),
map_num(modes, mode));
exit(2);
} else if (!mode && newmode) {
mode = newmode;
} else {
/* special case of -c --help */
if (opt == 'c' &&
( strncmp(optarg, "--h", 3)==0 ||
strncmp(optarg, "-h", 2)==0)) {
fputs(Help_config, stderr);
exit(0);
}
if (option_index >= 0)
fprintf(stderr, "--%s", long_options[option_index].name);
else
fprintf(stderr, "-%c", opt);
fprintf(stderr, " does not set the mode, and so cannot be first.\n");
exit(2);
}
/* if we just set the mode, then done */
switch(opt) {
case '@':
case '#':
case 'A':
case 'B':
case 'C':
case 'F':
continue;
}
if (opt == 1) {
/* an undecorated option - must be a device name.
*/
if (devs_found > 0 && mode == '@' && !devmode) {
fprintf(stderr, Name ": Must give on of -a/-r/-f for subsequent devices at %s\n", optarg);
exit(2);
}
dv = malloc(sizeof(*dv));
if (dv == NULL) {
fprintf(stderr, Name ": malloc failed\n");
exit(3);
}
dv->devname = optarg;
dv->disposition = devmode;
dv->next = NULL;
*devlistend = dv;
devlistend = &dv->next;
devs_found++;
continue;
}
/* We've got a mode, and opt is now something else which
* could depend on the mode */
#define O(a,b) ((a<<8)|b)
switch (O(mode,opt)) {
case O(CREATE,'c'):
case O(BUILD,'c'): /* chunk or rounding */
if (chunk) {
fprintf(stderr, Name ": chunk/rounding may only be specified once. "
"Second value is %s.\n", optarg);
exit(2);
}
chunk = strtol(optarg, &c, 10);
if (!optarg[0] || *c || chunk<4 || ((chunk-1)&chunk)) {
fprintf(stderr, Name ": invalid chunk/rounding value: %s\n",
optarg);
exit(2);
}
continue;
case O(CREATE,'z'): /* size */
if (size) {
fprintf(stderr, Name ": size may only be specified once. "
"Second value is %s.\n", optarg);
exit(2);
}
size = strtol(optarg, &c, 10);
if (!optarg[0] || *c || size < 4) {
fprintf(stderr, Name ": invalid size: %s\n",
optarg);
exit(2);
}
continue;
case O(CREATE,'l'):
case O(BUILD,'l'): /* set raid level*/
if (level != -10) {
fprintf(stderr, Name ": raid level may only be set once. "
"Second value is %s.\n", optarg);
exit(2);
}
level = map_name(pers, optarg);
if (level == -10) {
fprintf(stderr, Name ": invalid raid level: %s\n",
optarg);
exit(2);
}
if (level != 0 && level != -1 && mode == BUILD) {
fprintf(stderr, Name ": Raid level %s not permitted with --build.\n",
optarg);
exit(2);
}
if (sparedisks > 0 && level < 1 && level >= -1) {
fprintf(stderr, Name ": raid level %s is incompatible with spare-disks setting.\n",
optarg);
exit(2);
}
ident.level = level;
continue;
case O(CREATE,'p'): /* raid5 layout */
if (layout >= 0) {
fprintf(stderr,Name ": layout may only be sent once. "
"Second value was %s\n", optarg);
exit(2);
}
switch(level) {
default:
fprintf(stderr, Name ": layout not meaningful for %s arrays.\n",
map_num(pers, level));
exit(2);
case -10:
fprintf(stderr, Name ": raid level must be given before layout.\n");
exit(2);
case 5:
layout = map_name(r5layout, optarg);
if (layout==-10) {
fprintf(stderr, Name ": layout %s not understood for raid5.\n",
optarg);
exit(2);
}
break;
}
continue;
case O(CREATE,'n'):
case O(BUILD,'n'): /* number of raid disks */
if (raiddisks) {
fprintf(stderr, Name ": raid-disks set twice: %d and %s\n",
raiddisks, optarg);
exit(2);
}
raiddisks = strtol(optarg, &c, 10);
if (!optarg[0] || *c || raiddisks<=0 || raiddisks > MD_SB_DISKS) {
fprintf(stderr, Name ": invalid number of raid disks: %s\n",
optarg);
exit(2);
}
ident.raid_disks = raiddisks;
continue;
case O(CREATE,'x'): /* number of spare (eXtra) discs */
if (sparedisks) {
fprintf(stderr,Name ": spare-disks set twice: %d and %s\n",
sparedisks, optarg);
exit(2);
}
if (level > -10 && level <= 0 && level >= -1) {
fprintf(stderr, Name ": spare-disks setting is incompatible with raid level %d\n",
level);
exit(2);
}
sparedisks = strtol(optarg, &c, 10);
if (!optarg[0] || *c || sparedisks < 0 || sparedisks > MD_SB_DISKS - raiddisks) {
fprintf(stderr, Name ": invalid number of spare disks: %s\n",
optarg);
exit(2);
}
continue;
case O(CREATE,'f'): /* force honouring of device list */
case O(ASSEMBLE,'f'): /* force assembly */
case O(MISC,'f'): /* force zero */
force=1;
continue;
/* now for the Assemble options */
case O(ASSEMBLE,'u'): /* uuid of array */
if (ident.uuid_set) {
fprintf(stderr, Name ": uuid cannot be set twice. "
"Second value %s.\n", optarg);
exit(2);
}
if (parse_uuid(optarg, ident.uuid))
ident.uuid_set = 1;
else {
fprintf(stderr,Name ": Bad uuid: %s\n", optarg);
exit(2);
}
continue;
case O(ASSEMBLE,'m'): /* super-minor for array */
if (ident.super_minor >= 0) {
fprintf(stderr, Name ": super-minor cannot be set twice. "
"Second value: %s.\n", optarg);
exit(2);
}
ident.super_minor = strtoul(optarg, &cp, 10);
if (!optarg[0] || *cp) {
fprintf(stderr, Name ": Bad super-minor number: %s.\n", optarg);
exit(2);
}
continue;
case O(ASSEMBLE,'c'): /* config file */
case O(MONITOR,'c'):
if (configfile) {
fprintf(stderr, Name ": configfile cannot be set twice. "
"Second value is %s.\n", optarg);
exit(2);
}
configfile = optarg;
/* FIXME possibly check that config file exists. Even parse it */
continue;
case O(ASSEMBLE,'s'): /* scan */
case O(MISC,'s'):
case O(MONITOR,'s'):
scan = 1;
continue;
case O(MONITOR,'m'): /* mail address */
if (mailaddr)
fprintf(stderr, Name ": only specify one mailaddress. %s ignored.\n",
optarg);
else
mailaddr = optarg;
continue;
case O(MONITOR,'p'): /* alert program */
if (program)
fprintf(stderr, Name ": only specify one alter program. %s ignored.\n",
optarg);
else
program = optarg;
continue;
case O(MONITOR,'d'): /* delay in seconds */
if (delay)
fprintf(stderr, Name ": only specify delay once. %s ignored.\n",
optarg);
else {
delay = strtol(optarg, &c, 10);
if (!optarg[0] || *c || delay<1) {
fprintf(stderr, Name ": invalid delay: %s\n",
optarg);
exit(2);
}
}
continue;
/* now the general management options. Some are applicable
* to other modes. None have arguments.
*/
case O(MANAGE,'a'):
case O(CREATE,'a'):
case O(BUILD,'a'):
case O(ASSEMBLE,'a'): /* add a drive */
devmode = 'a';
continue;
case O(MANAGE,'r'): /* remove a drive */
devmode = 'r';
continue;
case O(MANAGE,'f'): /* set faulty */
devmode = 'f';
continue;
case O(MANAGE,'R'):
case O(ASSEMBLE,'R'):
case O(BUILD,'R'):
case O(CREATE,'R'): /* Run the array */
if (runstop < 0) {
fprintf(stderr, Name ": Cannot both Stop and Run an array\n");
exit(2);
}
runstop = 1;
continue;
case O(MANAGE,'S'):
if (runstop > 0) {
fprintf(stderr, Name ": Cannot both Run and Stop an array\n");
exit(2);
}
runstop = -1;
continue;
case O(MANAGE,'o'):
if (readonly < 0) {
fprintf(stderr, Name ": Cannot have both readonly and readwrite\n");
exit(2);
}
readonly = 1;
continue;
case O(MANAGE,'w'):
if (readonly > 0) {
fprintf(stderr, Name ": Cannot have both readwrite and readonly.\n");
exit(2);
}
readonly = -1;
continue;
case O(MISC,'Q'):
case O(MISC,'D'):
case O(MISC,'E'):
case O(MISC,'K'):
case O(MISC,'R'):
case O(MISC,'S'):
case O(MISC,'o'):
case O(MISC,'w'):
if (devmode && devmode != opt &&
(devmode == 'E' || (opt == 'E' && devmode != 'Q'))) {
fprintf(stderr, Name ": --examine/-E cannot be given with -%c\n",
devmode =='E'?opt:devmode);
exit(2);
}
devmode = opt;
continue;
}
/* We have now processed all the valid options. Anything else is
* an error
*/
fprintf(stderr, Name ": option %c not valid in %s mode\n",
opt, map_num(modes, mode));
exit(2);
}
if (!mode) {
fputs(Usage, stderr);
exit(2);
}
/* Ok, got the option parsing out of the way
* hopefully it's mostly right but there might be some stuff
* missing
*
* That is mosty checked in the per-mode stuff but...
*
* For @,B,C and A without -s, the first device listed must be an md device
* we check that here and open it.
*/
if (mode==MANAGE || mode == BUILD || mode == CREATE || (mode == ASSEMBLE && ! scan)) {
if (devs_found < 1) {
fprintf(stderr, Name ": an md device must be given in this mode\n");
exit(2);
}
mdfd = open_mddev(devlist->devname);
if (mdfd < 0)
exit(1);
}
rv = 0;
switch(mode) {
case MANAGE:
/* readonly, add/remove, readwrite, runstop */
if (readonly>0)
rv = Manage_ro(devlist->devname, mdfd, readonly);
if (!rv && devs_found>1)
rv = Manage_subdevs(devlist->devname, mdfd,
devlist->next);
if (!rv && readonly < 0)
rv = Manage_ro(devlist->devname, mdfd, readonly);
if (!rv && runstop)
rv = Manage_runstop(devlist->devname, mdfd, runstop);
break;
case ASSEMBLE:
if (!scan)
rv = Assemble(devlist->devname, mdfd, &ident, configfile,
devlist->next,
readonly, runstop, verbose, force);
else if (devs_found>0)
for (dv = devlist ; dv ; dv=dv->next) {
mddev_ident_t array_ident = conf_get_ident(configfile, dv->devname);
mdfd = open_mddev(dv->devname);
if (mdfd < 0) {
rv |= 1;
continue;
}
if (array_ident == NULL) {
fprintf(stderr, Name ": %s not identified in config file.\n",
dv->devname);
rv |= 1;
continue;
}
rv |= Assemble(dv->devname, mdfd, array_ident, configfile,
NULL,
readonly, runstop, verbose, force);
}
else {
mddev_ident_t array_list = conf_get_ident(configfile, NULL);
if (!array_list) {
fprintf(stderr, Name ": No arrays found in config file\n");
rv = 1;
} else
for (; array_list; array_list = array_list->next) {
mdu_array_info_t array;
mdfd = open_mddev(array_list->devname);
if (mdfd < 0) {
rv |= 1;
continue;
}
if (ioctl(mdfd, GET_ARRAY_INFO, &array)>=0)
/* already assembled, skip */
continue;
rv |= Assemble(array_list->devname, mdfd,
array_list, configfile,
NULL,
readonly, runstop, verbose, force);
}
}
break;
case BUILD:
rv = Build(devlist->devname, mdfd, chunk, level, raiddisks, devlist->next);
break;
case CREATE:
rv = Create(devlist->devname, mdfd, chunk, level, layout, size,
raiddisks, sparedisks,
devs_found-1, devlist->next, runstop, verbose, force);
break;
case MISC:
if (devmode == 'E') {
if (devlist == NULL && !scan) {
fprintf(stderr, Name ": No devices to examine\n");
exit(2);
}
if (devlist == NULL)
devlist = conf_get_devs(configfile);
if (devlist == NULL) {
fprintf(stderr, Name ": No devices listed in %s\n", configfile?configfile:DefaultConfFile);
exit(1);
}
rv = Examine(devlist, devlist?brief:!verbose, scan);
} else {
if (devlist == NULL) {
if ((devmode == 'S' ||devmode=='D') && scan) {
/* apply to all devices in /proc/mdstat */
struct mdstat_ent *ms = mdstat_read();
struct mdstat_ent *e;
for (e=ms ; e ; e=e->next) {
char *name = get_md_name(e->devnum);
if (!name) {
fprintf(stderr, Name ": cannot find device file for %s\n",
e->dev);
continue;
}
if (devmode == 'D')
rv |= Detail(name, !verbose);
else if (devmode=='S') {
mdfd = open_mddev(name);
if (mdfd >= 0)
rv |= Manage_runstop(name, mdfd, -1);
}
put_md_name(name);
}
} else {
fprintf(stderr, Name ": No devices given.\n");
exit(2);
}
}
for (dv=devlist ; dv; dv=dv->next) {
switch(dv->disposition) {
case 'D':
rv |= Detail(dv->devname, brief); continue;
case 'K': /* Zero superblock */
rv |= Kill(dv->devname, force); continue;
case 'Q':
rv |= Query(dv->devname); continue;
}
mdfd = open_mddev(dv->devname);
if (mdfd>=0)
switch(dv->disposition) {
case 'R':
rv |= Manage_runstop(dv->devname, mdfd, 1); break;
case 'S':
rv |= Manage_runstop(dv->devname, mdfd, -1); break;
case 'o':
rv |= Manage_ro(dv->devname, mdfd, 1); break;
case 'w':
rv |= Manage_ro(dv->devname, mdfd, -1); break;
}
}
}
break;
case MONITOR:
/*
if (!devlist && !scan) {
fprintf(stderr, Name ": Cannot monitor: need --scan or at least one device\n");
rv = 1;
break;
}
*/ rv= Monitor(devlist, mailaddr, program,
delay?delay:60, scan, configfile);
break;
}
exit(rv);
}
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