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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, |
dd0781e5 | 38 | mddev_dev_t devlist, int assume_clean) |
64c4757e | 39 | { |
82b27616 NB |
40 | /* Build a linear or raid0 arrays without superblocks |
41 | * We cannot really do any checks, we just do it. | |
42 | * For md_version < 0.90.0, we call REGISTER_DEV | |
43 | * with the device numbers, and then | |
44 | * START_MD giving the "geometry" | |
45 | * geometry is 0xpp00cc | |
46 | * where pp is personality: 1==linear, 2=raid0 | |
47 | * cc = chunk size factor: 0==4k, 1==8k etc. | |
48 | * | |
49 | * For md_version >= 0.90.0 we call | |
50 | * SET_ARRAY_INFO, ADD_NEW_DISK, RUN_ARRAY | |
51 | * | |
52 | */ | |
b5e64645 | 53 | int verbose = 0; |
82b27616 NB |
54 | int i; |
55 | int vers; | |
56 | struct stat stb; | |
cd29a5c8 NB |
57 | int subdevs = 0; |
58 | mddev_dev_t dv; | |
82b27616 NB |
59 | |
60 | /* scan all devices, make sure they really are block devices */ | |
cd29a5c8 NB |
61 | for (dv = devlist; dv; dv=dv->next) { |
62 | if (stat(dv->devname, &stb)) { | |
82b27616 | 63 | fprintf(stderr, Name ": Cannot find %s: %s\n", |
cd29a5c8 | 64 | dv->devname, strerror(errno)); |
82b27616 NB |
65 | return 1; |
66 | } | |
67 | if ((stb.st_mode & S_IFMT) != S_IFBLK) { | |
68 | fprintf(stderr, Name ": %s is not a block device.\n", | |
cd29a5c8 | 69 | dv->devname); |
82b27616 NB |
70 | return 1; |
71 | } | |
cd29a5c8 NB |
72 | subdevs++; |
73 | } | |
74 | ||
75 | if (raiddisks != subdevs) { | |
76 | fprintf(stderr, Name ": requested %d devices in array but listed %d\n", | |
77 | raiddisks, subdevs); | |
78 | return 1; | |
82b27616 NB |
79 | } |
80 | ||
b5e64645 NB |
81 | if (layout == UnSet) |
82 | switch(level) { | |
83 | default: /* no layout */ | |
84 | layout = 0; | |
85 | break; | |
86 | case 10: | |
87 | layout = 0x102; /* near=2, far=1 */ | |
88 | if (verbose) | |
89 | fprintf(stderr, | |
90 | Name ": layout defaults to n1\n"); | |
91 | break; | |
92 | case 5: | |
93 | case 6: | |
94 | layout = map_name(r5layout, "default"); | |
95 | if (verbose) | |
96 | fprintf(stderr, | |
97 | Name ": layout defaults to %s\n", map_num(r5layout, layout)); | |
98 | break; | |
99 | case LEVEL_FAULTY: | |
100 | layout = map_name(faultylayout, "default"); | |
101 | ||
102 | if (verbose) | |
103 | fprintf(stderr, | |
104 | Name ": layout defaults to %s\n", map_num(faultylayout, layout)); | |
105 | break; | |
106 | } | |
107 | ||
108 | ||
82b27616 NB |
109 | vers = md_get_version(mdfd); |
110 | ||
111 | /* looks Ok, go for it */ | |
cd29a5c8 | 112 | if (vers >= 9000) { |
82b27616 NB |
113 | mdu_array_info_t array; |
114 | array.level = level; | |
115 | array.size = 0; | |
116 | array.nr_disks = raiddisks; | |
117 | array.raid_disks = raiddisks; | |
118 | array.md_minor = 0; | |
119 | if (fstat(mdfd, &stb)==0) | |
0df46c2a | 120 | array.md_minor = minor(stb.st_rdev); |
cd29a5c8 | 121 | array.not_persistent = 1; |
82b27616 | 122 | array.state = 0; /* not clean, but no errors */ |
dd0781e5 NB |
123 | if (assume_clean) |
124 | array.state |= 1; | |
82b27616 NB |
125 | array.active_disks = raiddisks; |
126 | array.working_disks = raiddisks; | |
127 | array.spare_disks = 0; | |
128 | array.failed_disks = 0; | |
cd29a5c8 NB |
129 | if (chunk == 0) |
130 | chunk = 64; | |
82b27616 | 131 | array.chunk_size = chunk*1024; |
b5e64645 | 132 | array.layout = layout; |
82b27616 NB |
133 | if (ioctl(mdfd, SET_ARRAY_INFO, &array)) { |
134 | fprintf(stderr, Name ": SET_ARRAY_INFO failed for %s: %s\n", | |
135 | mddev, strerror(errno)); | |
136 | return 1; | |
137 | } | |
138 | } | |
139 | /* now add the devices */ | |
cd29a5c8 NB |
140 | for ((i=0), (dv = devlist) ; dv ; i++, dv=dv->next) { |
141 | if (stat(dv->devname, &stb)) { | |
82b27616 | 142 | fprintf(stderr, Name ": Wierd: %s has disappeared.\n", |
cd29a5c8 | 143 | dv->devname); |
82b27616 NB |
144 | goto abort; |
145 | } | |
cd29a5c8 | 146 | if ((stb.st_mode & S_IFMT)!= S_IFBLK) { |
82b27616 | 147 | fprintf(stderr, Name ": Wierd: %s is no longer a block device.\n", |
cd29a5c8 | 148 | dv->devname); |
82b27616 NB |
149 | goto abort; |
150 | } | |
cd29a5c8 | 151 | if (vers>= 9000) { |
82b27616 NB |
152 | mdu_disk_info_t disk; |
153 | disk.number = i; | |
154 | disk.raid_disk = i; | |
155 | disk.state = 6; | |
0df46c2a NB |
156 | disk.major = major(stb.st_rdev); |
157 | disk.minor = minor(stb.st_rdev); | |
82b27616 NB |
158 | if (ioctl(mdfd, ADD_NEW_DISK, &disk)) { |
159 | fprintf(stderr, Name ": ADD_NEW_DISK failed for %s: %s\n", | |
cd29a5c8 | 160 | dv->devname, strerror(errno)); |
82b27616 NB |
161 | goto abort; |
162 | } | |
163 | } else { | |
164 | if (ioctl(mdfd, REGISTER_DEV, &stb.st_rdev)) { | |
e0d19036 | 165 | fprintf(stderr, Name ": REGISTER_DEV failed for %s: %s.\n", |
cd29a5c8 | 166 | dv->devname, strerror(errno)); |
82b27616 NB |
167 | goto abort; |
168 | } | |
169 | } | |
170 | } | |
171 | /* now to start it */ | |
cd29a5c8 | 172 | if (vers >= 9000) { |
82b27616 | 173 | mdu_param_t param; /* not used by syscall */ |
cd29a5c8 | 174 | if (ioctl(mdfd, RUN_ARRAY, ¶m)) { |
82b27616 NB |
175 | fprintf(stderr, Name ": RUN_ARRAY failed: %s\n", |
176 | strerror(errno)); | |
177 | goto abort; | |
178 | } | |
179 | } else { | |
cd29a5c8 | 180 | unsigned long arg; |
82b27616 NB |
181 | arg=0; |
182 | while (chunk > 4096) { | |
183 | arg++; | |
184 | chunk >>= 1; | |
185 | } | |
186 | if (level == 0) | |
187 | chunk |= 0x20000; | |
188 | else chunk |= 0x10000; | |
189 | if (ioctl(mdfd, START_MD, arg)) { | |
190 | fprintf(stderr, Name ": START_MD failed: %s\n", | |
191 | strerror(errno)); | |
192 | goto abort; | |
193 | } | |
194 | } | |
195 | fprintf(stderr, Name ": array %s built and started.\n", | |
196 | mddev); | |
197 | return 0; | |
198 | ||
199 | abort: | |
cd29a5c8 | 200 | if (vers >= 9000) |
82b27616 NB |
201 | ioctl(mdfd, STOP_ARRAY, 0); |
202 | else | |
203 | ioctl(mdfd, STOP_MD, 0); | |
204 | return 1; | |
205 | ||
64c4757e | 206 | } |
82b27616 | 207 |