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3ceb2820 CB |
1 | /* |
2 | * lxc: linux Container library | |
3 | * | |
4 | * (C) Copyright IBM Corp. 2007, 2008 | |
5 | * | |
6 | * Authors: | |
7 | * Daniel Lezcano <daniel.lezcano at free.fr> | |
8 | * | |
9 | * This library is free software; you can redistribute it and/or | |
10 | * modify it under the terms of the GNU Lesser General Public | |
11 | * License as published by the Free Software Foundation; either | |
12 | * version 2.1 of the License, or (at your option) any later version. | |
13 | * | |
14 | * This library is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * Lesser General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU Lesser General Public | |
20 | * License along with this library; if not, write to the Free Software | |
21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
22 | */ | |
23 | ||
24 | #define _GNU_SOURCE | |
25 | #define __STDC_FORMAT_MACROS /* Required for PRIu64 to work. */ | |
7b22b3e9 | 26 | #include <inttypes.h> /* Required for PRIu64 to work. */ |
3ceb2820 CB |
27 | #include <stdint.h> |
28 | #include <stdio.h> | |
29 | #include <stdlib.h> | |
30 | #include <string.h> | |
31 | ||
3ceb2820 | 32 | #include "log.h" |
28d832c4 | 33 | #include "storage.h" |
f2d5a09d | 34 | #include "storage_utils.h" |
3ceb2820 CB |
35 | #include "utils.h" |
36 | ||
10bc1861 | 37 | lxc_log_define(rbd, lxc); |
3ceb2820 | 38 | |
3b0e906f CB |
39 | struct rbd_args { |
40 | const char *osd_pool_name; | |
41 | const char *rbd_name; | |
42 | const char *size; | |
43 | }; | |
44 | ||
45 | int rbd_create_wrapper(void *data) | |
46 | { | |
47 | struct rbd_args *args = data; | |
48 | ||
49 | execlp("rbd", "rbd", "create", "--pool", args->osd_pool_name, | |
50 | args->rbd_name, "--size", args->size, (char *)NULL); | |
51 | ||
52 | return -1; | |
53 | } | |
54 | ||
55 | int rbd_map_wrapper(void *data) | |
56 | { | |
57 | struct rbd_args *args = data; | |
58 | ||
59 | execlp("rbd", "rbd", "map", "--pool", args->osd_pool_name, | |
60 | args->rbd_name, (char *)NULL); | |
61 | ||
62 | return -1; | |
63 | } | |
64 | ||
65 | int rbd_unmap_wrapper(void *data) | |
66 | { | |
67 | struct rbd_args *args = data; | |
68 | ||
69 | execlp("rbd", "rbd", "unmap", args->rbd_name, (char *)NULL); | |
70 | ||
71 | return -1; | |
72 | } | |
73 | ||
74 | int rbd_delete_wrapper(void *data) | |
75 | { | |
76 | struct rbd_args *args = data; | |
77 | ||
78 | execlp("rbd", "rbd", "rm", args->rbd_name, (char *)NULL); | |
79 | ||
80 | return -1; | |
81 | } | |
82 | ||
10bc1861 CB |
83 | int rbd_clonepaths(struct lxc_storage *orig, struct lxc_storage *new, |
84 | const char *oldname, const char *cname, const char *oldpath, | |
85 | const char *lxcpath, int snap, uint64_t newsize, | |
86 | struct lxc_conf *conf) | |
3ceb2820 CB |
87 | { |
88 | ERROR("rbd clonepaths not implemented"); | |
89 | return -1; | |
90 | } | |
91 | ||
10bc1861 | 92 | int rbd_create(struct lxc_storage *bdev, const char *dest, const char *n, |
7b22b3e9 | 93 | struct bdev_specs *specs) |
3ceb2820 | 94 | { |
3b0e906f | 95 | const char *rbdpool, *fstype; |
3ceb2820 CB |
96 | uint64_t size; |
97 | int ret, len; | |
98 | char sz[24]; | |
a5b18cb1 CB |
99 | const char *cmd_args[2]; |
100 | char cmd_output[MAXPATHLEN]; | |
3b0e906f CB |
101 | const char *rbdname = n; |
102 | struct rbd_args args = {0}; | |
3ceb2820 CB |
103 | |
104 | if (!specs) | |
105 | return -1; | |
106 | ||
107 | rbdpool = specs->rbd.rbdpool; | |
108 | if (!rbdpool) | |
109 | rbdpool = lxc_global_config_value("lxc.bdev.rbd.rbdpool"); | |
110 | ||
111 | if (specs->rbd.rbdname) | |
112 | rbdname = specs->rbd.rbdname; | |
113 | ||
114 | /* source device /dev/rbd/lxc/ctn */ | |
43bd0ebf | 115 | len = strlen(rbdpool) + strlen(rbdname) + 4 + 11; |
3ceb2820 | 116 | bdev->src = malloc(len); |
3b0e906f CB |
117 | if (!bdev->src) { |
118 | ERROR("Failed to allocate memory"); | |
3ceb2820 | 119 | return -1; |
3b0e906f | 120 | } |
3ceb2820 | 121 | |
43bd0ebf | 122 | ret = snprintf(bdev->src, len, "rbd:/dev/rbd/%s/%s", rbdpool, rbdname); |
3b0e906f CB |
123 | if (ret < 0 || ret >= len) { |
124 | ERROR("Failed to create string"); | |
3ceb2820 | 125 | return -1; |
3b0e906f | 126 | } |
3ceb2820 | 127 | |
7b22b3e9 | 128 | /* fssize is in bytes */ |
3ceb2820 CB |
129 | size = specs->fssize; |
130 | if (!size) | |
131 | size = DEFAULT_FS_SIZE; | |
132 | ||
7b22b3e9 CB |
133 | /* in megabytes for rbd tool */ |
134 | ret = snprintf(sz, 24, "%" PRIu64, size / 1024 / 1024); | |
3b0e906f CB |
135 | if (ret < 0 || ret >= 24) { |
136 | ERROR("Failed to create string"); | |
3ceb2820 | 137 | return -1; |
3ceb2820 | 138 | } |
3ceb2820 | 139 | |
3b0e906f CB |
140 | args.osd_pool_name = rbdpool; |
141 | args.rbd_name = rbdname; | |
142 | args.size = sz; | |
143 | ret = run_command(cmd_output, sizeof(cmd_output), rbd_create_wrapper, | |
144 | (void *)&args); | |
145 | if (ret < 0) { | |
146 | ERROR("Failed to create rbd storage volume \"%s\": %s", rbdname, | |
147 | cmd_output); | |
3ceb2820 | 148 | return -1; |
3ceb2820 | 149 | } |
3b0e906f CB |
150 | |
151 | ret = run_command(cmd_output, sizeof(cmd_output), rbd_map_wrapper, | |
152 | (void *)&args); | |
153 | if (ret < 0) { | |
154 | ERROR("Failed to map rbd storage volume \"%s\": %s", rbdname, | |
155 | cmd_output); | |
3ceb2820 | 156 | return -1; |
3b0e906f | 157 | } |
3ceb2820 CB |
158 | |
159 | fstype = specs->fstype; | |
160 | if (!fstype) | |
161 | fstype = DEFAULT_FSTYPE; | |
162 | ||
a5b18cb1 | 163 | cmd_args[0] = fstype; |
3b0e906f | 164 | cmd_args[1] = lxc_storage_get_path(bdev->src, bdev->type); |
a5b18cb1 CB |
165 | ret = run_command(cmd_output, sizeof(cmd_output), do_mkfs_exec_wrapper, |
166 | (void *)cmd_args); | |
3b0e906f CB |
167 | if (ret < 0) { |
168 | ERROR("Failed to map rbd storage volume \"%s\": %s", rbdname, | |
169 | cmd_output); | |
3ceb2820 | 170 | return -1; |
3b0e906f | 171 | } |
a5b18cb1 | 172 | |
3b0e906f CB |
173 | bdev->dest = strdup(dest); |
174 | if (!bdev->dest) { | |
175 | ERROR("Failed to duplicate string \"%s\"", dest); | |
3ceb2820 | 176 | return -1; |
3b0e906f | 177 | } |
3ceb2820 | 178 | |
3b0e906f CB |
179 | ret = mkdir_p(bdev->dest, 0755); |
180 | if (ret < 0 && errno != EEXIST) { | |
181 | ERROR("Failed to create directory \"%s\"", bdev->dest); | |
3ceb2820 CB |
182 | return -1; |
183 | } | |
184 | ||
3b0e906f | 185 | TRACE("Created rbd storage volume \"%s\"", bdev->dest); |
3ceb2820 CB |
186 | return 0; |
187 | } | |
188 | ||
10bc1861 | 189 | int rbd_destroy(struct lxc_storage *orig) |
3ceb2820 | 190 | { |
3b0e906f | 191 | int ret; |
43bd0ebf | 192 | char *src; |
3ceb2820 | 193 | char *rbdfullname; |
3b0e906f CB |
194 | char cmd_output[MAXPATHLEN]; |
195 | struct rbd_args args = {0}; | |
3ceb2820 | 196 | |
43bd0ebf CB |
197 | src = lxc_storage_get_path(orig->src, orig->type); |
198 | if (file_exists(src)) { | |
3b0e906f CB |
199 | args.rbd_name = src; |
200 | ret = run_command(cmd_output, sizeof(cmd_output), | |
201 | rbd_unmap_wrapper, (void *)&args); | |
202 | if (ret < 0) { | |
203 | ERROR("Failed to map rbd storage volume \"%s\": %s", | |
204 | src, cmd_output); | |
3ceb2820 | 205 | return -1; |
3ceb2820 | 206 | } |
3ceb2820 CB |
207 | } |
208 | ||
3b0e906f CB |
209 | rbdfullname = alloca(strlen(src) - 8); |
210 | strcpy(rbdfullname, &src[9]); | |
211 | args.rbd_name = rbdfullname; | |
212 | ret = run_command(cmd_output, sizeof(cmd_output), | |
213 | rbd_delete_wrapper, (void *)&args); | |
214 | if (ret < 0) { | |
215 | ERROR("Failed to delete rbd storage volume \"%s\": %s", | |
216 | rbdfullname, cmd_output); | |
3ceb2820 | 217 | return -1; |
3ceb2820 | 218 | } |
3b0e906f CB |
219 | |
220 | return 0; | |
3ceb2820 CB |
221 | } |
222 | ||
3d2ae1e2 | 223 | bool rbd_detect(const char *path) |
3ceb2820 | 224 | { |
f7ac4459 | 225 | if (!strncmp(path, "rbd:", 4)) |
3d2ae1e2 | 226 | return true; |
f7ac4459 CB |
227 | |
228 | if (!strncmp(path, "/dev/rbd/", 9)) | |
3d2ae1e2 | 229 | return true; |
f7ac4459 | 230 | |
3d2ae1e2 | 231 | return false; |
3ceb2820 CB |
232 | } |
233 | ||
10bc1861 | 234 | int rbd_mount(struct lxc_storage *bdev) |
3ceb2820 | 235 | { |
43bd0ebf | 236 | char *src; |
3b0e906f | 237 | |
3ceb2820 CB |
238 | if (strcmp(bdev->type, "rbd")) |
239 | return -22; | |
43bd0ebf | 240 | |
3ceb2820 CB |
241 | if (!bdev->src || !bdev->dest) |
242 | return -22; | |
243 | ||
43bd0ebf CB |
244 | src = lxc_storage_get_path(bdev->src, bdev->type); |
245 | if (!file_exists(src)) { | |
7b22b3e9 CB |
246 | /* If blkdev does not exist it should be mapped, because it is |
247 | * not persistent on reboot. | |
248 | */ | |
3ceb2820 CB |
249 | ERROR("Block device %s is not mapped.", bdev->src); |
250 | return -1; | |
251 | } | |
252 | ||
3b0e906f | 253 | return mount_unknown_fs(src, bdev->dest, bdev->mntopts); |
3ceb2820 CB |
254 | } |
255 | ||
10bc1861 | 256 | int rbd_umount(struct lxc_storage *bdev) |
3ceb2820 CB |
257 | { |
258 | if (strcmp(bdev->type, "rbd")) | |
259 | return -22; | |
43bd0ebf | 260 | |
3ceb2820 CB |
261 | if (!bdev->src || !bdev->dest) |
262 | return -22; | |
43bd0ebf | 263 | |
3ceb2820 CB |
264 | return umount(bdev->dest); |
265 | } |