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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 | ||
64c4757e NB |
36 | int Build(char *mddev, int mdfd, int chunk, int level, |
37 | int raiddisks, | |
cd29a5c8 | 38 | mddev_dev_t devlist) |
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 | */ | |
53 | int i; | |
54 | int vers; | |
55 | struct stat stb; | |
cd29a5c8 NB |
56 | int subdevs = 0; |
57 | mddev_dev_t dv; | |
82b27616 NB |
58 | |
59 | /* scan all devices, make sure they really are block devices */ | |
cd29a5c8 NB |
60 | for (dv = devlist; dv; dv=dv->next) { |
61 | if (stat(dv->devname, &stb)) { | |
82b27616 | 62 | fprintf(stderr, Name ": Cannot find %s: %s\n", |
cd29a5c8 | 63 | dv->devname, strerror(errno)); |
82b27616 NB |
64 | return 1; |
65 | } | |
66 | if ((stb.st_mode & S_IFMT) != S_IFBLK) { | |
67 | fprintf(stderr, Name ": %s is not a block device.\n", | |
cd29a5c8 | 68 | dv->devname); |
82b27616 NB |
69 | return 1; |
70 | } | |
cd29a5c8 NB |
71 | subdevs++; |
72 | } | |
73 | ||
74 | if (raiddisks != subdevs) { | |
75 | fprintf(stderr, Name ": requested %d devices in array but listed %d\n", | |
76 | raiddisks, subdevs); | |
77 | return 1; | |
82b27616 NB |
78 | } |
79 | ||
80 | vers = md_get_version(mdfd); | |
81 | ||
82 | /* looks Ok, go for it */ | |
cd29a5c8 | 83 | if (vers >= 9000) { |
82b27616 NB |
84 | mdu_array_info_t array; |
85 | array.level = level; | |
86 | array.size = 0; | |
87 | array.nr_disks = raiddisks; | |
88 | array.raid_disks = raiddisks; | |
89 | array.md_minor = 0; | |
90 | if (fstat(mdfd, &stb)==0) | |
91 | array.md_minor = MINOR(stb.st_rdev); | |
cd29a5c8 | 92 | array.not_persistent = 1; |
82b27616 NB |
93 | array.state = 0; /* not clean, but no errors */ |
94 | array.active_disks = raiddisks; | |
95 | array.working_disks = raiddisks; | |
96 | array.spare_disks = 0; | |
97 | array.failed_disks = 0; | |
cd29a5c8 NB |
98 | if (chunk == 0) |
99 | chunk = 64; | |
82b27616 NB |
100 | array.chunk_size = chunk*1024; |
101 | if (ioctl(mdfd, SET_ARRAY_INFO, &array)) { | |
102 | fprintf(stderr, Name ": SET_ARRAY_INFO failed for %s: %s\n", | |
103 | mddev, strerror(errno)); | |
104 | return 1; | |
105 | } | |
106 | } | |
107 | /* now add the devices */ | |
cd29a5c8 NB |
108 | for ((i=0), (dv = devlist) ; dv ; i++, dv=dv->next) { |
109 | if (stat(dv->devname, &stb)) { | |
82b27616 | 110 | fprintf(stderr, Name ": Wierd: %s has disappeared.\n", |
cd29a5c8 | 111 | dv->devname); |
82b27616 NB |
112 | goto abort; |
113 | } | |
cd29a5c8 | 114 | if ((stb.st_mode & S_IFMT)!= S_IFBLK) { |
82b27616 | 115 | fprintf(stderr, Name ": Wierd: %s is no longer a block device.\n", |
cd29a5c8 | 116 | dv->devname); |
82b27616 NB |
117 | goto abort; |
118 | } | |
cd29a5c8 | 119 | if (vers>= 9000) { |
82b27616 NB |
120 | mdu_disk_info_t disk; |
121 | disk.number = i; | |
122 | disk.raid_disk = i; | |
123 | disk.state = 6; | |
124 | disk.major = MAJOR(stb.st_rdev); | |
125 | disk.minor = MINOR(stb.st_rdev); | |
126 | if (ioctl(mdfd, ADD_NEW_DISK, &disk)) { | |
127 | fprintf(stderr, Name ": ADD_NEW_DISK failed for %s: %s\n", | |
cd29a5c8 | 128 | dv->devname, strerror(errno)); |
82b27616 NB |
129 | goto abort; |
130 | } | |
131 | } else { | |
132 | if (ioctl(mdfd, REGISTER_DEV, &stb.st_rdev)) { | |
e0d19036 | 133 | fprintf(stderr, Name ": REGISTER_DEV failed for %s: %s.\n", |
cd29a5c8 | 134 | dv->devname, strerror(errno)); |
82b27616 NB |
135 | goto abort; |
136 | } | |
137 | } | |
138 | } | |
139 | /* now to start it */ | |
cd29a5c8 | 140 | if (vers >= 9000) { |
82b27616 | 141 | mdu_param_t param; /* not used by syscall */ |
cd29a5c8 | 142 | if (ioctl(mdfd, RUN_ARRAY, ¶m)) { |
82b27616 NB |
143 | fprintf(stderr, Name ": RUN_ARRAY failed: %s\n", |
144 | strerror(errno)); | |
145 | goto abort; | |
146 | } | |
147 | } else { | |
cd29a5c8 | 148 | unsigned long arg; |
82b27616 NB |
149 | arg=0; |
150 | while (chunk > 4096) { | |
151 | arg++; | |
152 | chunk >>= 1; | |
153 | } | |
154 | if (level == 0) | |
155 | chunk |= 0x20000; | |
156 | else chunk |= 0x10000; | |
157 | if (ioctl(mdfd, START_MD, arg)) { | |
158 | fprintf(stderr, Name ": START_MD failed: %s\n", | |
159 | strerror(errno)); | |
160 | goto abort; | |
161 | } | |
162 | } | |
163 | fprintf(stderr, Name ": array %s built and started.\n", | |
164 | mddev); | |
165 | return 0; | |
166 | ||
167 | abort: | |
cd29a5c8 | 168 | if (vers >= 9000) |
82b27616 NB |
169 | ioctl(mdfd, STOP_ARRAY, 0); |
170 | else | |
171 | ioctl(mdfd, STOP_MD, 0); | |
172 | return 1; | |
173 | ||
64c4757e | 174 | } |
82b27616 | 175 |