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64c4757e | 1 | /* |
9a9dab36 | 2 | * mdadm - manage Linux "md" devices aka RAID arrays. |
64c4757e | 3 | * |
e736b623 | 4 | * Copyright (C) 2001-2009 Neil Brown <neilb@suse.de> |
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 | |
e736b623 | 22 | * Email: <neilb@suse.de> |
64c4757e NB |
23 | */ |
24 | ||
9a9dab36 | 25 | #include "mdadm.h" |
64c4757e | 26 | |
a4e8316a N |
27 | int Build(char *mddev, struct mddev_dev *devlist, |
28 | struct shape *s, struct context *c) | |
64c4757e | 29 | { |
82b27616 NB |
30 | /* Build a linear or raid0 arrays without superblocks |
31 | * We cannot really do any checks, we just do it. | |
32 | * For md_version < 0.90.0, we call REGISTER_DEV | |
33 | * with the device numbers, and then | |
34 | * START_MD giving the "geometry" | |
35 | * geometry is 0xpp00cc | |
36 | * where pp is personality: 1==linear, 2=raid0 | |
37 | * cc = chunk size factor: 0==4k, 1==8k etc. | |
82b27616 NB |
38 | */ |
39 | int i; | |
0a6bff09 | 40 | dev_t rdev; |
98ce3849 | 41 | int subdevs = 0, missing_disks = 0; |
a655e550 | 42 | struct mddev_dev *dv; |
c82f047c | 43 | int bitmap_fd; |
f9c25f1d | 44 | unsigned long long bitmapsize; |
7f91af49 | 45 | int mdfd; |
a04d5763 N |
46 | char chosen_name[1024]; |
47 | int uuid[4] = {0,0,0,0}; | |
ad5bc697 | 48 | struct map_ent *map = NULL; |
e6e5f8f1 JS |
49 | mdu_array_info_t array; |
50 | mdu_param_t param; /* not used by syscall */ | |
82b27616 | 51 | |
1b4944f3 ZL |
52 | if (s->level == UnSet) { |
53 | pr_err("a RAID level is needed to Build an array.\n"); | |
54 | return 1; | |
55 | } | |
82b27616 | 56 | /* scan all devices, make sure they really are block devices */ |
cd29a5c8 | 57 | for (dv = devlist; dv; dv=dv->next) { |
98ce3849 NB |
58 | subdevs++; |
59 | if (strcmp("missing", dv->devname) == 0) { | |
60 | missing_disks++; | |
61 | continue; | |
62 | } | |
9e04ac1c | 63 | if (!stat_is_blkdev(dv->devname, NULL)) |
82b27616 | 64 | return 1; |
cd29a5c8 NB |
65 | } |
66 | ||
a4e8316a | 67 | if (s->raiddisks != subdevs) { |
e7b84f9d | 68 | pr_err("requested %d devices in array but listed %d\n", |
a4e8316a | 69 | s->raiddisks, subdevs); |
cd29a5c8 | 70 | return 1; |
82b27616 NB |
71 | } |
72 | ||
a4e8316a N |
73 | if (s->layout == UnSet) |
74 | switch(s->level) { | |
b5e64645 | 75 | default: /* no layout */ |
a4e8316a | 76 | s->layout = 0; |
b5e64645 NB |
77 | break; |
78 | case 10: | |
a4e8316a | 79 | s->layout = 0x102; /* near=2, far=1 */ |
0c9e4afb | 80 | if (c->verbose > 0) |
e7b84f9d | 81 | pr_err("layout defaults to n1\n"); |
b5e64645 NB |
82 | break; |
83 | case 5: | |
84 | case 6: | |
a4e8316a | 85 | s->layout = map_name(r5layout, "default"); |
0c9e4afb | 86 | if (c->verbose > 0) |
a4e8316a | 87 | pr_err("layout defaults to %s\n", map_num(r5layout, s->layout)); |
b5e64645 NB |
88 | break; |
89 | case LEVEL_FAULTY: | |
a4e8316a | 90 | s->layout = map_name(faultylayout, "default"); |
b5e64645 | 91 | |
0c9e4afb | 92 | if (c->verbose > 0) |
a4e8316a | 93 | pr_err("layout defaults to %s\n", map_num(faultylayout, s->layout)); |
b5e64645 NB |
94 | break; |
95 | } | |
96 | ||
69207ff6 | 97 | /* We need to create the device. It can have no name. */ |
ad5bc697 | 98 | map_lock(&map); |
0c9e4afb | 99 | mdfd = create_mddev(mddev, NULL, c->autof, LOCAL, |
cd6cbb08 | 100 | chosen_name, 0); |
ad5bc697 N |
101 | if (mdfd < 0) { |
102 | map_unlock(&map); | |
7f91af49 | 103 | return 1; |
ad5bc697 | 104 | } |
a714580e | 105 | mddev = chosen_name; |
b5e64645 | 106 | |
4dd2df09 | 107 | map_update(&map, fd2devnm(mdfd), "none", uuid, chosen_name); |
ad5bc697 | 108 | map_unlock(&map); |
a04d5763 | 109 | |
e6e5f8f1 JS |
110 | array.level = s->level; |
111 | if (s->size == MAX_SIZE) | |
112 | s->size = 0; | |
113 | array.size = s->size; | |
114 | array.nr_disks = s->raiddisks; | |
115 | array.raid_disks = s->raiddisks; | |
116 | array.md_minor = 0; | |
0a6bff09 ZL |
117 | if (fstat_is_blkdev(mdfd, mddev, &rdev)) |
118 | array.md_minor = minor(rdev); | |
e6e5f8f1 JS |
119 | array.not_persistent = 1; |
120 | array.state = 0; /* not clean, but no errors */ | |
121 | if (s->assume_clean) | |
122 | array.state |= 1; | |
123 | array.active_disks = s->raiddisks - missing_disks; | |
124 | array.working_disks = s->raiddisks - missing_disks; | |
125 | array.spare_disks = 0; | |
126 | array.failed_disks = missing_disks; | |
127 | if (s->chunk == 0 && (s->level==0 || s->level==LEVEL_LINEAR)) | |
128 | s->chunk = 64; | |
129 | array.chunk_size = s->chunk*1024; | |
130 | array.layout = s->layout; | |
131 | if (md_set_array_info(mdfd, &array)) { | |
132 | pr_err("md_set_array_info() failed for %s: %s\n", | |
133 | mddev, strerror(errno)); | |
7f91af49 | 134 | goto abort; |
82b27616 | 135 | } |
5b28bd56 | 136 | |
748952f7 N |
137 | if (s->bitmap_file && strcmp(s->bitmap_file, "none") == 0) |
138 | s->bitmap_file = NULL; | |
a4e8316a | 139 | if (s->bitmap_file && s->level <= 0) { |
e7b84f9d | 140 | pr_err("bitmaps not meaningful with level %s\n", |
a4e8316a | 141 | map_num(pers, s->level)?:"given"); |
7f91af49 | 142 | goto abort; |
5b28bd56 | 143 | } |
82b27616 | 144 | /* now add the devices */ |
cd29a5c8 | 145 | for ((i=0), (dv = devlist) ; dv ; i++, dv=dv->next) { |
e6e5f8f1 | 146 | mdu_disk_info_t disk; |
beae1dfe | 147 | unsigned long long dsize; |
fe80f49b | 148 | int fd; |
e6e5f8f1 | 149 | |
98ce3849 NB |
150 | if (strcmp("missing", dv->devname) == 0) |
151 | continue; | |
9e04ac1c | 152 | if (!stat_is_blkdev(dv->devname, &rdev)) |
82b27616 | 153 | goto abort; |
fe80f49b NB |
154 | fd = open(dv->devname, O_RDONLY|O_EXCL); |
155 | if (fd < 0) { | |
e7b84f9d | 156 | pr_err("Cannot open %s: %s\n", |
fe80f49b NB |
157 | dv->devname, strerror(errno)); |
158 | goto abort; | |
159 | } | |
beae1dfe | 160 | if (get_dev_size(fd, NULL, &dsize) && |
a4e8316a N |
161 | (s->size == 0 || s->size == MAX_SIZE || dsize < s->size)) |
162 | s->size = dsize; | |
fe80f49b | 163 | close(fd); |
e6e5f8f1 JS |
164 | disk.number = i; |
165 | disk.raid_disk = i; | |
166 | disk.state = (1<<MD_DISK_SYNC) | (1<<MD_DISK_ACTIVE); | |
167 | if (dv->writemostly == FlagSet) | |
168 | disk.state |= 1<<MD_DISK_WRITEMOSTLY; | |
9e04ac1c ZL |
169 | disk.major = major(rdev); |
170 | disk.minor = minor(rdev); | |
e6e5f8f1 JS |
171 | if (ioctl(mdfd, ADD_NEW_DISK, &disk)) { |
172 | pr_err("ADD_NEW_DISK failed for %s: %s\n", | |
173 | dv->devname, strerror(errno)); | |
174 | goto abort; | |
82b27616 NB |
175 | } |
176 | } | |
177 | /* now to start it */ | |
e6e5f8f1 JS |
178 | if (s->bitmap_file) { |
179 | bitmap_fd = open(s->bitmap_file, O_RDWR); | |
180 | if (bitmap_fd < 0) { | |
181 | int major = BITMAP_MAJOR_HI; | |
1bfdbe01 | 182 | #if 0 |
e6e5f8f1 JS |
183 | if (s->bitmap_chunk == UnSet) { |
184 | pr_err("%s cannot be openned.", s->bitmap_file); | |
185 | goto abort; | |
186 | } | |
dcec9ee5 | 187 | #endif |
e6e5f8f1 JS |
188 | bitmapsize = s->size >> 9; /* FIXME wrong for RAID10 */ |
189 | if (CreateBitmap(s->bitmap_file, 1, NULL, | |
190 | s->bitmap_chunk, c->delay, | |
191 | s->write_behind, bitmapsize, major)) { | |
192 | goto abort; | |
aba69144 | 193 | } |
e6e5f8f1 JS |
194 | bitmap_fd = open(s->bitmap_file, O_RDWR); |
195 | if (bitmap_fd < 0) { | |
196 | pr_err("%s cannot be openned.", s->bitmap_file); | |
197 | goto abort; | |
c82f047c NB |
198 | } |
199 | } | |
e6e5f8f1 JS |
200 | if (bitmap_fd >= 0) { |
201 | if (ioctl(mdfd, SET_BITMAP_FILE, bitmap_fd) < 0) { | |
202 | pr_err("Cannot set bitmap file for %s: %s\n", | |
203 | mddev, strerror(errno)); | |
204 | goto abort; | |
a252c078 | 205 | } |
82b27616 | 206 | } |
e6e5f8f1 JS |
207 | } |
208 | if (ioctl(mdfd, RUN_ARRAY, ¶m)) { | |
209 | pr_err("RUN_ARRAY failed: %s\n", strerror(errno)); | |
210 | if (s->chunk & (s->chunk - 1)) { | |
211 | cont_err("Problem may be that chunk size is not a power of 2\n"); | |
82b27616 | 212 | } |
e6e5f8f1 | 213 | goto abort; |
82b27616 | 214 | } |
e6e5f8f1 | 215 | |
0c9e4afb | 216 | if (c->verbose >= 0) |
e7b84f9d | 217 | pr_err("array %s built and started.\n", |
dab6685f | 218 | mddev); |
a7c6e3fb | 219 | wait_for(mddev, mdfd); |
7f91af49 | 220 | close(mdfd); |
82b27616 NB |
221 | return 0; |
222 | ||
223 | abort: | |
e6e5f8f1 | 224 | ioctl(mdfd, STOP_ARRAY, 0); |
7f91af49 | 225 | close(mdfd); |
82b27616 | 226 | return 1; |
64c4757e | 227 | } |