]> git.ipfire.org Git - thirdparty/mdadm.git/blob - Build.c
Add 'quite' option and tidy up some tests.
[thirdparty/mdadm.git] / Build.c
1 /*
2 * mdadm - manage Linux "md" devices aka RAID arrays.
3 *
4 * Copyright (C) 2001-2002 Neil Brown <neilb@cse.unsw.edu.au>
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
30 #include "mdadm.h"
31
32 #define REGISTER_DEV _IO (MD_MAJOR, 1)
33 #define START_MD _IO (MD_MAJOR, 2)
34 #define STOP_MD _IO (MD_MAJOR, 3)
35
36 int Build(char *mddev, int mdfd, int chunk, int level, int layout,
37 int raiddisks,
38 mddev_dev_t devlist, int assume_clean,
39 char *bitmap_file, int bitmap_chunk, int write_behind, int delay, int verbose)
40 {
41 /* Build a linear or raid0 arrays without superblocks
42 * We cannot really do any checks, we just do it.
43 * For md_version < 0.90.0, we call REGISTER_DEV
44 * with the device numbers, and then
45 * START_MD giving the "geometry"
46 * geometry is 0xpp00cc
47 * where pp is personality: 1==linear, 2=raid0
48 * cc = chunk size factor: 0==4k, 1==8k etc.
49 *
50 * For md_version >= 0.90.0 we call
51 * SET_ARRAY_INFO, ADD_NEW_DISK, RUN_ARRAY
52 *
53 */
54 int i;
55 int vers;
56 struct stat stb;
57 int subdevs = 0, missing_disks = 0;
58 mddev_dev_t dv;
59 int bitmap_fd;
60 /* unsigned long long size = ~0ULL; / * needed for bitmap only */
61
62 /* scan all devices, make sure they really are block devices */
63 for (dv = devlist; dv; dv=dv->next) {
64 subdevs++;
65 if (strcmp("missing", dv->devname) == 0) {
66 missing_disks++;
67 continue;
68 }
69 if (stat(dv->devname, &stb)) {
70 fprintf(stderr, Name ": Cannot find %s: %s\n",
71 dv->devname, strerror(errno));
72 return 1;
73 }
74 if ((stb.st_mode & S_IFMT) != S_IFBLK) {
75 fprintf(stderr, Name ": %s is not a block device.\n",
76 dv->devname);
77 return 1;
78 }
79 }
80
81 if (raiddisks != subdevs) {
82 fprintf(stderr, Name ": requested %d devices in array but listed %d\n",
83 raiddisks, subdevs);
84 return 1;
85 }
86
87 if (layout == UnSet)
88 switch(level) {
89 default: /* no layout */
90 layout = 0;
91 break;
92 case 10:
93 layout = 0x102; /* near=2, far=1 */
94 if (verbose > 0)
95 fprintf(stderr,
96 Name ": layout defaults to n1\n");
97 break;
98 case 5:
99 case 6:
100 layout = map_name(r5layout, "default");
101 if (verbose > 0)
102 fprintf(stderr,
103 Name ": layout defaults to %s\n", map_num(r5layout, layout));
104 break;
105 case LEVEL_FAULTY:
106 layout = map_name(faultylayout, "default");
107
108 if (verbose > 0)
109 fprintf(stderr,
110 Name ": layout defaults to %s\n", map_num(faultylayout, layout));
111 break;
112 }
113
114
115 vers = md_get_version(mdfd);
116
117 /* looks Ok, go for it */
118 if (vers >= 9000) {
119 mdu_array_info_t array;
120 array.level = level;
121 array.size = 0;
122 array.nr_disks = raiddisks;
123 array.raid_disks = raiddisks;
124 array.md_minor = 0;
125 if (fstat(mdfd, &stb)==0)
126 array.md_minor = minor(stb.st_rdev);
127 array.not_persistent = 1;
128 array.state = 0; /* not clean, but no errors */
129 if (assume_clean)
130 array.state |= 1;
131 array.active_disks = raiddisks - missing_disks;
132 array.working_disks = raiddisks - missing_disks;
133 array.spare_disks = 0;
134 array.failed_disks = missing_disks;
135 if (chunk == 0 && (level==0 || level==LEVEL_LINEAR))
136 chunk = 64;
137 array.chunk_size = chunk*1024;
138 array.layout = layout;
139 if (ioctl(mdfd, SET_ARRAY_INFO, &array)) {
140 fprintf(stderr, Name ": SET_ARRAY_INFO failed for %s: %s\n",
141 mddev, strerror(errno));
142 return 1;
143 }
144 } else if (bitmap_file) {
145 fprintf(stderr, Name ": bitmaps not supported with this kernel\n");
146 return 1;
147 }
148 /* now add the devices */
149 for ((i=0), (dv = devlist) ; dv ; i++, dv=dv->next) {
150 if (strcmp("missing", dv->devname) == 0)
151 continue;
152 if (stat(dv->devname, &stb)) {
153 fprintf(stderr, Name ": Weird: %s has disappeared.\n",
154 dv->devname);
155 goto abort;
156 }
157 if ((stb.st_mode & S_IFMT)!= S_IFBLK) {
158 fprintf(stderr, Name ": Wierd: %s is no longer a block device.\n",
159 dv->devname);
160 goto abort;
161 }
162 if (vers>= 9000) {
163 mdu_disk_info_t disk;
164 disk.number = i;
165 disk.raid_disk = i;
166 disk.state = (1<<MD_DISK_SYNC) | (1<<MD_DISK_ACTIVE);
167 if (dv->writemostly)
168 disk.state |= 1<<MD_DISK_WRITEMOSTLY;
169 disk.major = major(stb.st_rdev);
170 disk.minor = minor(stb.st_rdev);
171 if (ioctl(mdfd, ADD_NEW_DISK, &disk)) {
172 fprintf(stderr, Name ": ADD_NEW_DISK failed for %s: %s\n",
173 dv->devname, strerror(errno));
174 goto abort;
175 }
176 } else {
177 if (ioctl(mdfd, REGISTER_DEV, &stb.st_rdev)) {
178 fprintf(stderr, Name ": REGISTER_DEV failed for %s: %s.\n",
179 dv->devname, strerror(errno));
180 goto abort;
181 }
182 }
183 }
184 /* now to start it */
185 if (vers >= 9000) {
186 mdu_param_t param; /* not used by syscall */
187 if (bitmap_file) {
188 bitmap_fd = open(bitmap_file, O_RDWR);
189 if (bitmap_fd < 0) {
190 if (bitmap_chunk == UnSet) {
191 fprintf(stderr, Name ": %s cannot be openned.",
192 bitmap_file);
193 return 1;
194 }
195 if (CreateBitmap(bitmap_file, 1, NULL, bitmap_chunk,
196 delay, write_behind, 0/* FIXME size */)) {
197 return 1;
198 }
199 bitmap_fd = open(bitmap_file, O_RDWR);
200 if (bitmap_fd < 0) {
201 fprintf(stderr, Name ": %s cannot be openned.",
202 bitmap_file);
203 return 1;
204 }
205 }
206 if (bitmap_fd >= 0) {
207 if (ioctl(mdfd, SET_BITMAP_FILE, bitmap_fd) < 0) {
208 fprintf(stderr, Name ": Cannot set bitmap file for %s: %s\n",
209 mddev, strerror(errno));
210 return 1;
211 }
212 }
213 }
214 if (ioctl(mdfd, RUN_ARRAY, &param)) {
215 fprintf(stderr, Name ": RUN_ARRAY failed: %s\n",
216 strerror(errno));
217 goto abort;
218 }
219 } else {
220 unsigned long arg;
221 arg=0;
222 while (chunk > 4096) {
223 arg++;
224 chunk >>= 1;
225 }
226 if (level == 0)
227 chunk |= 0x20000;
228 else chunk |= 0x10000;
229 if (ioctl(mdfd, START_MD, arg)) {
230 fprintf(stderr, Name ": START_MD failed: %s\n",
231 strerror(errno));
232 goto abort;
233 }
234 }
235 if (verbose >= 0)
236 fprintf(stderr, Name ": array %s built and started.\n",
237 mddev);
238 return 0;
239
240 abort:
241 if (vers >= 9000)
242 ioctl(mdfd, STOP_ARRAY, 0);
243 else
244 ioctl(mdfd, STOP_MD, 0);
245 return 1;
246
247 }