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Commit | Line | Data |
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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 |
38 | int 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 | ||
75 | int 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, ¶m)) { | |
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 |
117 | int 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 |
137 | int 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 | 155 | int 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 */ | |
cd29a5c8 | 197 | if (ioctl(fd, HOT_ADD_DISK, (unsigned long)stb.st_rdev)==0) { |
682c7051 | 198 | fprintf(stderr, Name ": hot added %s\n", |
cd29a5c8 | 199 | dv->devname); |
682c7051 NB |
200 | continue; |
201 | } | |
cd29a5c8 NB |
202 | save_errno = errno; |
203 | if (read(fd, buf, sizeof(buf)) > 0) { | |
204 | /* array is active, so don't try to add. | |
205 | * i.e. something is wrong | |
206 | */ | |
207 | fprintf(stderr, Name ": hot add failed for %s: %s\n", | |
208 | dv->devname, strerror(save_errno)); | |
209 | return 1; | |
210 | } | |
682c7051 NB |
211 | /* try ADD_NEW_DISK. |
212 | * we might be creating, we might be assembling, | |
213 | * it is hard to tell. | |
214 | * set up number/raid_disk/state just | |
215 | * in case | |
216 | */ | |
217 | for (j=0; j<array.nr_disks; j++) { | |
aa88f531 | 218 | disc.number = j; |
682c7051 NB |
219 | if (ioctl(fd, GET_DISK_INFO, &disc)) |
220 | break; | |
221 | if (disc.major==0 && disc.minor==0) | |
222 | break; | |
223 | if (disc.state & 8) /* removed */ | |
224 | break; | |
225 | } | |
226 | disc.number =j; | |
227 | disc.raid_disk = j; | |
228 | disc.state = 0; | |
0df46c2a NB |
229 | disc.major = major(stb.st_rdev); |
230 | disc.minor = minor(stb.st_rdev); | |
682c7051 | 231 | if (ioctl(fd,ADD_NEW_DISK, &disc)) { |
b83d95f3 | 232 | fprintf(stderr, Name ": add new device failed for %s: %s\n", |
cd29a5c8 | 233 | dv->devname, strerror(errno)); |
682c7051 NB |
234 | return 1; |
235 | } | |
cd29a5c8 | 236 | fprintf(stderr, Name ": added %s\n", dv->devname); |
682c7051 NB |
237 | break; |
238 | ||
239 | case 'r': | |
240 | /* hot remove */ | |
82b27616 | 241 | /* FIXME check that it is a current member */ |
cd29a5c8 | 242 | if (ioctl(fd, HOT_REMOVE_DISK, (unsigned long)stb.st_rdev)) { |
682c7051 | 243 | fprintf(stderr, Name ": hot remove failed for %s: %s\n", |
cd29a5c8 | 244 | dv->devname, strerror(errno)); |
682c7051 NB |
245 | return 1; |
246 | } | |
cd29a5c8 | 247 | fprintf(stderr, Name ": hot removed %s\n", dv->devname); |
682c7051 NB |
248 | break; |
249 | ||
250 | case 'f': /* set faulty */ | |
251 | /* FIXME check current member */ | |
cd29a5c8 | 252 | if (ioctl(fd, SET_DISK_FAULTY, (unsigned long) stb.st_rdev)) { |
b83d95f3 | 253 | fprintf(stderr, Name ": set device faulty failed for %s: %s\n", |
cd29a5c8 | 254 | dv->devname, strerror(errno)); |
682c7051 NB |
255 | return 1; |
256 | } | |
257 | fprintf(stderr, Name ": set %s faulty in %s\n", | |
cd29a5c8 | 258 | dv->devname, devname); |
682c7051 NB |
259 | break; |
260 | } | |
261 | } | |
262 | return 0; | |
263 | ||
64c4757e | 264 | } |