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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 | |
1011e834 N |
27 | #define REGISTER_DEV _IO (MD_MAJOR, 1) |
28 | #define START_MD _IO (MD_MAJOR, 2) | |
29 | #define STOP_MD _IO (MD_MAJOR, 3) | |
82b27616 | 30 | |
a4e8316a N |
31 | int Build(char *mddev, struct mddev_dev *devlist, |
32 | struct shape *s, struct context *c) | |
64c4757e | 33 | { |
82b27616 NB |
34 | /* Build a linear or raid0 arrays without superblocks |
35 | * We cannot really do any checks, we just do it. | |
36 | * For md_version < 0.90.0, we call REGISTER_DEV | |
37 | * with the device numbers, and then | |
38 | * START_MD giving the "geometry" | |
39 | * geometry is 0xpp00cc | |
40 | * where pp is personality: 1==linear, 2=raid0 | |
41 | * cc = chunk size factor: 0==4k, 1==8k etc. | |
82b27616 NB |
42 | */ |
43 | int i; | |
82b27616 | 44 | struct stat stb; |
98ce3849 | 45 | int subdevs = 0, missing_disks = 0; |
a655e550 | 46 | struct mddev_dev *dv; |
c82f047c | 47 | int bitmap_fd; |
f9c25f1d | 48 | unsigned long long bitmapsize; |
7f91af49 | 49 | int mdfd; |
a04d5763 N |
50 | char chosen_name[1024]; |
51 | int uuid[4] = {0,0,0,0}; | |
ad5bc697 | 52 | struct map_ent *map = NULL; |
e6e5f8f1 JS |
53 | mdu_array_info_t array; |
54 | mdu_param_t param; /* not used by syscall */ | |
82b27616 | 55 | |
1b4944f3 ZL |
56 | if (s->level == UnSet) { |
57 | pr_err("a RAID level is needed to Build an array.\n"); | |
58 | return 1; | |
59 | } | |
82b27616 | 60 | /* scan all devices, make sure they really are block devices */ |
cd29a5c8 | 61 | for (dv = devlist; dv; dv=dv->next) { |
98ce3849 NB |
62 | subdevs++; |
63 | if (strcmp("missing", dv->devname) == 0) { | |
64 | missing_disks++; | |
65 | continue; | |
66 | } | |
cd29a5c8 | 67 | if (stat(dv->devname, &stb)) { |
e7b84f9d | 68 | pr_err("Cannot find %s: %s\n", |
cd29a5c8 | 69 | dv->devname, strerror(errno)); |
82b27616 NB |
70 | return 1; |
71 | } | |
72 | if ((stb.st_mode & S_IFMT) != S_IFBLK) { | |
e7b84f9d | 73 | pr_err("%s is not a block device.\n", |
cd29a5c8 | 74 | dv->devname); |
82b27616 NB |
75 | return 1; |
76 | } | |
cd29a5c8 NB |
77 | } |
78 | ||
a4e8316a | 79 | if (s->raiddisks != subdevs) { |
e7b84f9d | 80 | pr_err("requested %d devices in array but listed %d\n", |
a4e8316a | 81 | s->raiddisks, subdevs); |
cd29a5c8 | 82 | return 1; |
82b27616 NB |
83 | } |
84 | ||
a4e8316a N |
85 | if (s->layout == UnSet) |
86 | switch(s->level) { | |
b5e64645 | 87 | default: /* no layout */ |
a4e8316a | 88 | s->layout = 0; |
b5e64645 NB |
89 | break; |
90 | case 10: | |
a4e8316a | 91 | s->layout = 0x102; /* near=2, far=1 */ |
0c9e4afb | 92 | if (c->verbose > 0) |
e7b84f9d | 93 | pr_err("layout defaults to n1\n"); |
b5e64645 NB |
94 | break; |
95 | case 5: | |
96 | case 6: | |
a4e8316a | 97 | s->layout = map_name(r5layout, "default"); |
0c9e4afb | 98 | if (c->verbose > 0) |
a4e8316a | 99 | pr_err("layout defaults to %s\n", map_num(r5layout, s->layout)); |
b5e64645 NB |
100 | break; |
101 | case LEVEL_FAULTY: | |
a4e8316a | 102 | s->layout = map_name(faultylayout, "default"); |
b5e64645 | 103 | |
0c9e4afb | 104 | if (c->verbose > 0) |
a4e8316a | 105 | pr_err("layout defaults to %s\n", map_num(faultylayout, s->layout)); |
b5e64645 NB |
106 | break; |
107 | } | |
108 | ||
69207ff6 | 109 | /* We need to create the device. It can have no name. */ |
ad5bc697 | 110 | map_lock(&map); |
0c9e4afb | 111 | mdfd = create_mddev(mddev, NULL, c->autof, LOCAL, |
a04d5763 | 112 | chosen_name); |
ad5bc697 N |
113 | if (mdfd < 0) { |
114 | map_unlock(&map); | |
7f91af49 | 115 | return 1; |
ad5bc697 | 116 | } |
a714580e | 117 | mddev = chosen_name; |
b5e64645 | 118 | |
4dd2df09 | 119 | map_update(&map, fd2devnm(mdfd), "none", uuid, chosen_name); |
ad5bc697 | 120 | map_unlock(&map); |
a04d5763 | 121 | |
e6e5f8f1 JS |
122 | array.level = s->level; |
123 | if (s->size == MAX_SIZE) | |
124 | s->size = 0; | |
125 | array.size = s->size; | |
126 | array.nr_disks = s->raiddisks; | |
127 | array.raid_disks = s->raiddisks; | |
128 | array.md_minor = 0; | |
129 | if (fstat(mdfd, &stb) == 0) | |
130 | array.md_minor = minor(stb.st_rdev); | |
131 | array.not_persistent = 1; | |
132 | array.state = 0; /* not clean, but no errors */ | |
133 | if (s->assume_clean) | |
134 | array.state |= 1; | |
135 | array.active_disks = s->raiddisks - missing_disks; | |
136 | array.working_disks = s->raiddisks - missing_disks; | |
137 | array.spare_disks = 0; | |
138 | array.failed_disks = missing_disks; | |
139 | if (s->chunk == 0 && (s->level==0 || s->level==LEVEL_LINEAR)) | |
140 | s->chunk = 64; | |
141 | array.chunk_size = s->chunk*1024; | |
142 | array.layout = s->layout; | |
143 | if (md_set_array_info(mdfd, &array)) { | |
144 | pr_err("md_set_array_info() failed for %s: %s\n", | |
145 | mddev, strerror(errno)); | |
7f91af49 | 146 | goto abort; |
82b27616 | 147 | } |
5b28bd56 | 148 | |
748952f7 N |
149 | if (s->bitmap_file && strcmp(s->bitmap_file, "none") == 0) |
150 | s->bitmap_file = NULL; | |
a4e8316a | 151 | if (s->bitmap_file && s->level <= 0) { |
e7b84f9d | 152 | pr_err("bitmaps not meaningful with level %s\n", |
a4e8316a | 153 | map_num(pers, s->level)?:"given"); |
7f91af49 | 154 | goto abort; |
5b28bd56 | 155 | } |
82b27616 | 156 | /* now add the devices */ |
cd29a5c8 | 157 | for ((i=0), (dv = devlist) ; dv ; i++, dv=dv->next) { |
e6e5f8f1 | 158 | mdu_disk_info_t disk; |
beae1dfe | 159 | unsigned long long dsize; |
fe80f49b | 160 | int fd; |
e6e5f8f1 | 161 | |
98ce3849 NB |
162 | if (strcmp("missing", dv->devname) == 0) |
163 | continue; | |
cd29a5c8 | 164 | if (stat(dv->devname, &stb)) { |
e7b84f9d | 165 | pr_err("Weird: %s has disappeared.\n", |
cd29a5c8 | 166 | dv->devname); |
82b27616 NB |
167 | goto abort; |
168 | } | |
cd29a5c8 | 169 | if ((stb.st_mode & S_IFMT)!= S_IFBLK) { |
dae45415 | 170 | pr_err("Weird: %s is no longer a block device.\n", |
cd29a5c8 | 171 | dv->devname); |
82b27616 NB |
172 | goto abort; |
173 | } | |
fe80f49b NB |
174 | fd = open(dv->devname, O_RDONLY|O_EXCL); |
175 | if (fd < 0) { | |
e7b84f9d | 176 | pr_err("Cannot open %s: %s\n", |
fe80f49b NB |
177 | dv->devname, strerror(errno)); |
178 | goto abort; | |
179 | } | |
beae1dfe | 180 | if (get_dev_size(fd, NULL, &dsize) && |
a4e8316a N |
181 | (s->size == 0 || s->size == MAX_SIZE || dsize < s->size)) |
182 | s->size = dsize; | |
fe80f49b | 183 | close(fd); |
e6e5f8f1 JS |
184 | disk.number = i; |
185 | disk.raid_disk = i; | |
186 | disk.state = (1<<MD_DISK_SYNC) | (1<<MD_DISK_ACTIVE); | |
187 | if (dv->writemostly == FlagSet) | |
188 | disk.state |= 1<<MD_DISK_WRITEMOSTLY; | |
189 | disk.major = major(stb.st_rdev); | |
190 | disk.minor = minor(stb.st_rdev); | |
191 | if (ioctl(mdfd, ADD_NEW_DISK, &disk)) { | |
192 | pr_err("ADD_NEW_DISK failed for %s: %s\n", | |
193 | dv->devname, strerror(errno)); | |
194 | goto abort; | |
82b27616 NB |
195 | } |
196 | } | |
197 | /* now to start it */ | |
e6e5f8f1 JS |
198 | if (s->bitmap_file) { |
199 | bitmap_fd = open(s->bitmap_file, O_RDWR); | |
200 | if (bitmap_fd < 0) { | |
201 | int major = BITMAP_MAJOR_HI; | |
1bfdbe01 | 202 | #if 0 |
e6e5f8f1 JS |
203 | if (s->bitmap_chunk == UnSet) { |
204 | pr_err("%s cannot be openned.", s->bitmap_file); | |
205 | goto abort; | |
206 | } | |
dcec9ee5 | 207 | #endif |
e6e5f8f1 JS |
208 | bitmapsize = s->size >> 9; /* FIXME wrong for RAID10 */ |
209 | if (CreateBitmap(s->bitmap_file, 1, NULL, | |
210 | s->bitmap_chunk, c->delay, | |
211 | s->write_behind, bitmapsize, major)) { | |
212 | goto abort; | |
aba69144 | 213 | } |
e6e5f8f1 JS |
214 | bitmap_fd = open(s->bitmap_file, O_RDWR); |
215 | if (bitmap_fd < 0) { | |
216 | pr_err("%s cannot be openned.", s->bitmap_file); | |
217 | goto abort; | |
c82f047c NB |
218 | } |
219 | } | |
e6e5f8f1 JS |
220 | if (bitmap_fd >= 0) { |
221 | if (ioctl(mdfd, SET_BITMAP_FILE, bitmap_fd) < 0) { | |
222 | pr_err("Cannot set bitmap file for %s: %s\n", | |
223 | mddev, strerror(errno)); | |
224 | goto abort; | |
a252c078 | 225 | } |
82b27616 | 226 | } |
e6e5f8f1 JS |
227 | } |
228 | if (ioctl(mdfd, RUN_ARRAY, ¶m)) { | |
229 | pr_err("RUN_ARRAY failed: %s\n", strerror(errno)); | |
230 | if (s->chunk & (s->chunk - 1)) { | |
231 | cont_err("Problem may be that chunk size is not a power of 2\n"); | |
82b27616 | 232 | } |
e6e5f8f1 | 233 | goto abort; |
82b27616 | 234 | } |
e6e5f8f1 | 235 | |
0c9e4afb | 236 | if (c->verbose >= 0) |
e7b84f9d | 237 | pr_err("array %s built and started.\n", |
dab6685f | 238 | mddev); |
a7c6e3fb | 239 | wait_for(mddev, mdfd); |
7f91af49 | 240 | close(mdfd); |
82b27616 NB |
241 | return 0; |
242 | ||
243 | abort: | |
e6e5f8f1 | 244 | ioctl(mdfd, STOP_ARRAY, 0); |
7f91af49 | 245 | close(mdfd); |
82b27616 | 246 | return 1; |
64c4757e | 247 | } |