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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" |
64c4757e | 31 | |
82b27616 NB |
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 | ||
b5e64645 | 36 | int Build(char *mddev, int mdfd, int chunk, int level, int layout, |
64c4757e | 37 | int raiddisks, |
c82f047c NB |
38 | mddev_dev_t devlist, int assume_clean, |
39 | char *bitmap_file, int bitmap_chunk, int delay) | |
64c4757e | 40 | { |
82b27616 NB |
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 | */ | |
b5e64645 | 54 | int verbose = 0; |
82b27616 NB |
55 | int i; |
56 | int vers; | |
57 | struct stat stb; | |
98ce3849 | 58 | int subdevs = 0, missing_disks = 0; |
cd29a5c8 | 59 | mddev_dev_t dv; |
c82f047c | 60 | int bitmap_fd; |
98ce3849 | 61 | /* unsigned long long size = ~0ULL; / * needed for bitmap only */ |
82b27616 NB |
62 | |
63 | /* scan all devices, make sure they really are block devices */ | |
cd29a5c8 | 64 | for (dv = devlist; dv; dv=dv->next) { |
98ce3849 NB |
65 | subdevs++; |
66 | if (strcmp("missing", dv->devname) == 0) { | |
67 | missing_disks++; | |
68 | continue; | |
69 | } | |
cd29a5c8 | 70 | if (stat(dv->devname, &stb)) { |
82b27616 | 71 | fprintf(stderr, Name ": Cannot find %s: %s\n", |
cd29a5c8 | 72 | dv->devname, strerror(errno)); |
82b27616 NB |
73 | return 1; |
74 | } | |
75 | if ((stb.st_mode & S_IFMT) != S_IFBLK) { | |
76 | fprintf(stderr, Name ": %s is not a block device.\n", | |
cd29a5c8 | 77 | dv->devname); |
82b27616 NB |
78 | return 1; |
79 | } | |
cd29a5c8 NB |
80 | } |
81 | ||
82 | if (raiddisks != subdevs) { | |
83 | fprintf(stderr, Name ": requested %d devices in array but listed %d\n", | |
84 | raiddisks, subdevs); | |
85 | return 1; | |
82b27616 NB |
86 | } |
87 | ||
b5e64645 NB |
88 | if (layout == UnSet) |
89 | switch(level) { | |
90 | default: /* no layout */ | |
91 | layout = 0; | |
92 | break; | |
93 | case 10: | |
94 | layout = 0x102; /* near=2, far=1 */ | |
95 | if (verbose) | |
96 | fprintf(stderr, | |
97 | Name ": layout defaults to n1\n"); | |
98 | break; | |
99 | case 5: | |
100 | case 6: | |
101 | layout = map_name(r5layout, "default"); | |
102 | if (verbose) | |
103 | fprintf(stderr, | |
104 | Name ": layout defaults to %s\n", map_num(r5layout, layout)); | |
105 | break; | |
106 | case LEVEL_FAULTY: | |
107 | layout = map_name(faultylayout, "default"); | |
108 | ||
109 | if (verbose) | |
110 | fprintf(stderr, | |
111 | Name ": layout defaults to %s\n", map_num(faultylayout, layout)); | |
112 | break; | |
113 | } | |
114 | ||
115 | ||
82b27616 NB |
116 | vers = md_get_version(mdfd); |
117 | ||
118 | /* looks Ok, go for it */ | |
cd29a5c8 | 119 | if (vers >= 9000) { |
82b27616 NB |
120 | mdu_array_info_t array; |
121 | array.level = level; | |
122 | array.size = 0; | |
123 | array.nr_disks = raiddisks; | |
124 | array.raid_disks = raiddisks; | |
125 | array.md_minor = 0; | |
126 | if (fstat(mdfd, &stb)==0) | |
0df46c2a | 127 | array.md_minor = minor(stb.st_rdev); |
cd29a5c8 | 128 | array.not_persistent = 1; |
82b27616 | 129 | array.state = 0; /* not clean, but no errors */ |
dd0781e5 NB |
130 | if (assume_clean) |
131 | array.state |= 1; | |
98ce3849 NB |
132 | array.active_disks = raiddisks - missing_disks; |
133 | array.working_disks = raiddisks - missing_disks; | |
82b27616 | 134 | array.spare_disks = 0; |
98ce3849 | 135 | array.failed_disks = missing_disks; |
cd29a5c8 NB |
136 | if (chunk == 0) |
137 | chunk = 64; | |
82b27616 | 138 | array.chunk_size = chunk*1024; |
b5e64645 | 139 | array.layout = layout; |
82b27616 NB |
140 | if (ioctl(mdfd, SET_ARRAY_INFO, &array)) { |
141 | fprintf(stderr, Name ": SET_ARRAY_INFO failed for %s: %s\n", | |
142 | mddev, strerror(errno)); | |
143 | return 1; | |
144 | } | |
c82f047c NB |
145 | } else if (bitmap_file) { |
146 | fprintf(stderr, Name ": bitmaps not supported with this kernel\n"); | |
147 | return 1; | |
82b27616 NB |
148 | } |
149 | /* now add the devices */ | |
cd29a5c8 | 150 | for ((i=0), (dv = devlist) ; dv ; i++, dv=dv->next) { |
98ce3849 NB |
151 | if (strcmp("missing", dv->devname) == 0) |
152 | continue; | |
cd29a5c8 | 153 | if (stat(dv->devname, &stb)) { |
98ce3849 | 154 | fprintf(stderr, Name ": Weird: %s has disappeared.\n", |
cd29a5c8 | 155 | dv->devname); |
82b27616 NB |
156 | goto abort; |
157 | } | |
cd29a5c8 | 158 | if ((stb.st_mode & S_IFMT)!= S_IFBLK) { |
82b27616 | 159 | fprintf(stderr, Name ": Wierd: %s is no longer a block device.\n", |
cd29a5c8 | 160 | dv->devname); |
82b27616 NB |
161 | goto abort; |
162 | } | |
cd29a5c8 | 163 | if (vers>= 9000) { |
82b27616 NB |
164 | mdu_disk_info_t disk; |
165 | disk.number = i; | |
166 | disk.raid_disk = i; | |
167 | disk.state = 6; | |
0df46c2a NB |
168 | disk.major = major(stb.st_rdev); |
169 | disk.minor = minor(stb.st_rdev); | |
82b27616 NB |
170 | if (ioctl(mdfd, ADD_NEW_DISK, &disk)) { |
171 | fprintf(stderr, Name ": ADD_NEW_DISK failed for %s: %s\n", | |
cd29a5c8 | 172 | dv->devname, strerror(errno)); |
82b27616 NB |
173 | goto abort; |
174 | } | |
175 | } else { | |
176 | if (ioctl(mdfd, REGISTER_DEV, &stb.st_rdev)) { | |
e0d19036 | 177 | fprintf(stderr, Name ": REGISTER_DEV failed for %s: %s.\n", |
cd29a5c8 | 178 | dv->devname, strerror(errno)); |
82b27616 NB |
179 | goto abort; |
180 | } | |
181 | } | |
182 | } | |
183 | /* now to start it */ | |
cd29a5c8 | 184 | if (vers >= 9000) { |
82b27616 | 185 | mdu_param_t param; /* not used by syscall */ |
c82f047c NB |
186 | if (bitmap_file) { |
187 | bitmap_fd = open(bitmap_file, O_RDWR); | |
188 | if (bitmap_fd < 0) { | |
189 | if (bitmap_chunk == UnSet) { | |
190 | fprintf(stderr, Name ": %s cannot be openned.", | |
191 | bitmap_file); | |
192 | return 1; | |
193 | } | |
194 | if (CreateBitmap(bitmap_file, 1, NULL, bitmap_chunk, | |
195 | delay, 0/* FIXME size */)) { | |
196 | return 1; | |
197 | } | |
198 | bitmap_fd = open(bitmap_file, O_RDWR); | |
199 | if (bitmap_fd < 0) { | |
200 | fprintf(stderr, Name ": %s cannot be openned.", | |
201 | bitmap_file); | |
202 | return 1; | |
203 | } | |
204 | } | |
205 | if (bitmap_fd >= 0) { | |
206 | if (ioctl(mdfd, SET_BITMAP_FILE, bitmap_fd) < 0) { | |
207 | fprintf(stderr, Name ": Cannot set bitmap file for %s: %s\n", | |
208 | mddev, strerror(errno)); | |
209 | return 1; | |
210 | } | |
211 | } | |
212 | } | |
cd29a5c8 | 213 | if (ioctl(mdfd, RUN_ARRAY, ¶m)) { |
82b27616 NB |
214 | fprintf(stderr, Name ": RUN_ARRAY failed: %s\n", |
215 | strerror(errno)); | |
216 | goto abort; | |
217 | } | |
218 | } else { | |
cd29a5c8 | 219 | unsigned long arg; |
82b27616 NB |
220 | arg=0; |
221 | while (chunk > 4096) { | |
222 | arg++; | |
223 | chunk >>= 1; | |
224 | } | |
225 | if (level == 0) | |
226 | chunk |= 0x20000; | |
227 | else chunk |= 0x10000; | |
228 | if (ioctl(mdfd, START_MD, arg)) { | |
229 | fprintf(stderr, Name ": START_MD failed: %s\n", | |
230 | strerror(errno)); | |
231 | goto abort; | |
232 | } | |
233 | } | |
234 | fprintf(stderr, Name ": array %s built and started.\n", | |
235 | mddev); | |
236 | return 0; | |
237 | ||
238 | abort: | |
cd29a5c8 | 239 | if (vers >= 9000) |
82b27616 NB |
240 | ioctl(mdfd, STOP_ARRAY, 0); |
241 | else | |
242 | ioctl(mdfd, STOP_MD, 0); | |
243 | return 1; | |
244 | ||
64c4757e | 245 | } |