Release 1.10.0
[thirdparty/mdadm.git] / Manage.c
CommitLineData
64c4757e 1/*
9a9dab36 2 * mdadm - manage Linux "md" devices aka RAID arrays.
64c4757e 3 *
cd29a5c8 4 * Copyright (C) 2001-2002 Neil Brown <neilb@cse.unsw.edu.au>
64c4757e
NB
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@cse.unsw.edu.au>
23 * Paper: Neil Brown
24 * School of Computer Science and Engineering
25 * The University of New South Wales
26 * Sydney, 2052
27 * Australia
28 */
29
9a9dab36 30#include "mdadm.h"
682c7051
NB
31#include "md_u.h"
32#include "md_p.h"
64c4757e 33
82b27616
NB
34#define REGISTER_DEV _IO (MD_MAJOR, 1)
35#define START_MD _IO (MD_MAJOR, 2)
36#define STOP_MD _IO (MD_MAJOR, 3)
37
64c4757e
NB
38int Manage_ro(char *devname, int fd, int readonly)
39{
682c7051
NB
40 /* switch to readonly or rw
41 *
42 * requires >= 0.90.0
43 * first check that array is runing
44 * use RESTART_ARRAY_RW or STOP_ARRAY_RO
45 *
46 */
47 mdu_array_info_t array;
48
49 if (md_get_version(fd) < 9000) {
50 fprintf(stderr, Name ": need md driver version 0.90.0 or later\n");
51 return 1;
52 }
53 if (ioctl(fd, GET_ARRAY_INFO, &array)) {
54 fprintf(stderr, Name ": %s does not appear to be active.\n",
55 devname);
56 return 1;
57 }
58
59 if (readonly>0) {
60 if (ioctl(fd, STOP_ARRAY_RO, NULL)) {
61 fprintf(stderr, Name ": failed to set readonly for %s: %s\n",
62 devname, strerror(errno));
63 return 1;
64 }
65 } else if (readonly < 0) {
66 if (ioctl(fd, RESTART_ARRAY_RW, NULL)) {
82b27616 67 fprintf(stderr, Name ": failed to set writable for %s: %s\n",
682c7051
NB
68 devname, strerror(errno));
69 return 1;
70 }
71 }
72 return 0;
64c4757e
NB
73}
74
75int Manage_runstop(char *devname, int fd, int runstop)
76{
682c7051
NB
77 /* Run or stop the array. array must already be configured
78 * required >= 0.90.0
79 */
682c7051 80 mdu_param_t param; /* unused */
82b27616
NB
81
82 if (runstop == -1 && md_get_version(fd) < 9000) {
83 if (ioctl(fd, STOP_MD, 0)) {
84 fprintf(stderr, Name ": stopping device %s failed: %s\n",
85 devname, strerror(errno));
86 return 1;
87 }
88 }
682c7051
NB
89
90 if (md_get_version(fd) < 9000) {
91 fprintf(stderr, Name ": need md driver version 0.90.0 or later\n");
92 return 1;
93 }
82b27616 94 /*
682c7051
NB
95 if (ioctl(fd, GET_ARRAY_INFO, &array)) {
96 fprintf(stderr, Name ": %s does not appear to be active.\n",
97 devname);
98 return 1;
99 }
82b27616 100 */
682c7051
NB
101 if (runstop>0) {
102 if (ioctl(fd, RUN_ARRAY, &param)) {
103 fprintf(stderr, Name ": failed to run array %s: %s\n",
104 devname, strerror(errno));
105 return 1;
106 }
107 } else if (runstop < 0){
108 if (ioctl(fd, STOP_ARRAY, NULL)) {
52826846 109 fprintf(stderr, Name ": fail to stop array %s: %s\n",
682c7051
NB
110 devname, strerror(errno));
111 return 1;
112 }
113 }
114 return 0;
64c4757e
NB
115}
116
dd0781e5
NB
117int Manage_resize(char *devname, int fd, long long size, int raid_disks)
118{
119 mdu_array_info_t info;
120 if (ioctl(fd, GET_ARRAY_INFO, &info) != 0) {
121 fprintf(stderr, Name ": Cannot get array information for %s: %s\n",
122 devname, strerror(errno));
123 return 1;
124 }
125 if (size >= 0)
126 info.size = size;
127 if (raid_disks > 0)
128 info.raid_disks = raid_disks;
129 if (ioctl(fd, SET_ARRAY_INFO, &info) != 0) {
130 fprintf(stderr, Name ": Cannot set device size/shape for %s: %s\n",
131 devname, strerror(errno));
132 return 1;
133 }
134 return 0;
135}
136
b5e64645
NB
137int Manage_reconfig(char *devname, int fd, int layout)
138{
139 mdu_array_info_t info;
140 if (ioctl(fd, GET_ARRAY_INFO, &info) != 0) {
141 fprintf(stderr, Name ": Cannot get array information for %s: %s\n",
142 devname, strerror(errno));
143 return 1;
144 }
145 info.layout = layout;
146 printf("layout set to %d\n", info.layout);
147 if (ioctl(fd, SET_ARRAY_INFO, &info) != 0) {
148 fprintf(stderr, Name ": Cannot set layout for %s: %s\n",
149 devname, strerror(errno));
150 return 1;
151 }
152 return 0;
153}
dd0781e5 154
64c4757e 155int Manage_subdevs(char *devname, int fd,
cd29a5c8
NB
156 mddev_dev_t devlist)
157{
682c7051
NB
158 /* do something to each dev.
159 * devmode can be
160 * 'a' - add the device
161 * try HOT_ADD_DISK
162 * If that fails EINVAL, try ADD_NEW_DISK
163 * 'r' - remove the device HOT_REMOVE_DISK
164 * 'f' - set the device faulty SET_DISK_FAULTY
165 */
166 mdu_array_info_t array;
167 mdu_disk_info_t disc;
cd29a5c8 168 mddev_dev_t dv;
682c7051 169 struct stat stb;
c913b90e 170 int j;
cd29a5c8 171 int save_errno;
e0d19036 172 static char buf[4096];
682c7051
NB
173
174 if (ioctl(fd, GET_ARRAY_INFO, &array)) {
175 fprintf(stderr, Name ": cannot get array info for %s\n",
176 devname);
177 return 1;
178 }
cd29a5c8
NB
179 for (dv = devlist ; dv; dv=dv->next) {
180 if (stat(dv->devname, &stb)) {
682c7051 181 fprintf(stderr, Name ": cannot find %s: %s\n",
cd29a5c8 182 dv->devname, strerror(errno));
682c7051
NB
183 return 1;
184 }
185 if ((stb.st_mode & S_IFMT) != S_IFBLK) {
186 fprintf(stderr, Name ": %s is not a block device.\n",
cd29a5c8 187 dv->devname);
682c7051
NB
188 return 1;
189 }
cd29a5c8 190 switch(dv->disposition){
682c7051 191 default:
c913b90e
NB
192 fprintf(stderr, Name ": internal error - devmode[%s]=%d\n",
193 dv->devname, dv->disposition);
682c7051
NB
194 return 1;
195 case 'a':
196 /* add the device - hot or cold */
d7eaf49f
NB
197 /* Make sure it isn' in use (in 2.6 or later) */
198 fd = open(dv->devname, O_RDONLY|O_EXCL);
199 if (fd < 0) {
200 fprintf(stderr, Name ": Cannot open %s: %s\n",
201 dv->devname, strerror(errno));
202 return 1;
203 }
204 close(fd);
cd29a5c8 205 if (ioctl(fd, HOT_ADD_DISK, (unsigned long)stb.st_rdev)==0) {
682c7051 206 fprintf(stderr, Name ": hot added %s\n",
cd29a5c8 207 dv->devname);
682c7051
NB
208 continue;
209 }
cd29a5c8
NB
210 save_errno = errno;
211 if (read(fd, buf, sizeof(buf)) > 0) {
212 /* array is active, so don't try to add.
213 * i.e. something is wrong
214 */
215 fprintf(stderr, Name ": hot add failed for %s: %s\n",
216 dv->devname, strerror(save_errno));
217 return 1;
218 }
682c7051
NB
219 /* try ADD_NEW_DISK.
220 * we might be creating, we might be assembling,
221 * it is hard to tell.
222 * set up number/raid_disk/state just
223 * in case
224 */
225 for (j=0; j<array.nr_disks; j++) {
aa88f531 226 disc.number = j;
682c7051
NB
227 if (ioctl(fd, GET_DISK_INFO, &disc))
228 break;
229 if (disc.major==0 && disc.minor==0)
230 break;
231 if (disc.state & 8) /* removed */
232 break;
233 }
234 disc.number =j;
235 disc.raid_disk = j;
236 disc.state = 0;
0df46c2a
NB
237 disc.major = major(stb.st_rdev);
238 disc.minor = minor(stb.st_rdev);
682c7051 239 if (ioctl(fd,ADD_NEW_DISK, &disc)) {
b83d95f3 240 fprintf(stderr, Name ": add new device failed for %s: %s\n",
cd29a5c8 241 dv->devname, strerror(errno));
682c7051
NB
242 return 1;
243 }
cd29a5c8 244 fprintf(stderr, Name ": added %s\n", dv->devname);
682c7051
NB
245 break;
246
247 case 'r':
248 /* hot remove */
82b27616 249 /* FIXME check that it is a current member */
cd29a5c8 250 if (ioctl(fd, HOT_REMOVE_DISK, (unsigned long)stb.st_rdev)) {
682c7051 251 fprintf(stderr, Name ": hot remove failed for %s: %s\n",
cd29a5c8 252 dv->devname, strerror(errno));
682c7051
NB
253 return 1;
254 }
cd29a5c8 255 fprintf(stderr, Name ": hot removed %s\n", dv->devname);
682c7051
NB
256 break;
257
258 case 'f': /* set faulty */
259 /* FIXME check current member */
cd29a5c8 260 if (ioctl(fd, SET_DISK_FAULTY, (unsigned long) stb.st_rdev)) {
b83d95f3 261 fprintf(stderr, Name ": set device faulty failed for %s: %s\n",
cd29a5c8 262 dv->devname, strerror(errno));
682c7051
NB
263 return 1;
264 }
265 fprintf(stderr, Name ": set %s faulty in %s\n",
cd29a5c8 266 dv->devname, devname);
682c7051
NB
267 break;
268 }
269 }
270 return 0;
271
64c4757e 272}