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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 | ||
d38dd64a CB |
24 | #ifndef _GNU_SOURCE |
25 | #define _GNU_SOURCE 1 | |
26 | #endif | |
3ceb2820 | 27 | #define __STDC_FORMAT_MACROS /* Required for PRIu64 to work. */ |
7b22b3e9 | 28 | #include <inttypes.h> /* Required for PRIu64 to work. */ |
3ceb2820 CB |
29 | #include <stdint.h> |
30 | #include <stdio.h> | |
31 | #include <stdlib.h> | |
32 | #include <string.h> | |
33 | ||
d38dd64a | 34 | #include "config.h" |
3ceb2820 | 35 | #include "log.h" |
32068050 | 36 | #include "memory_utils.h" |
28d832c4 | 37 | #include "storage.h" |
f2d5a09d | 38 | #include "storage_utils.h" |
3ceb2820 CB |
39 | #include "utils.h" |
40 | ||
43f984ea DJ |
41 | #ifndef HAVE_STRLCPY |
42 | #include "include/strlcpy.h" | |
43 | #endif | |
44 | ||
10bc1861 | 45 | lxc_log_define(rbd, lxc); |
3ceb2820 | 46 | |
3b0e906f CB |
47 | struct rbd_args { |
48 | const char *osd_pool_name; | |
49 | const char *rbd_name; | |
50 | const char *size; | |
51 | }; | |
52 | ||
53 | int rbd_create_wrapper(void *data) | |
54 | { | |
55 | struct rbd_args *args = data; | |
56 | ||
57 | execlp("rbd", "rbd", "create", "--pool", args->osd_pool_name, | |
58 | args->rbd_name, "--size", args->size, (char *)NULL); | |
59 | ||
60 | return -1; | |
61 | } | |
62 | ||
63 | int rbd_map_wrapper(void *data) | |
64 | { | |
65 | struct rbd_args *args = data; | |
66 | ||
67 | execlp("rbd", "rbd", "map", "--pool", args->osd_pool_name, | |
68 | args->rbd_name, (char *)NULL); | |
69 | ||
70 | return -1; | |
71 | } | |
72 | ||
73 | int rbd_unmap_wrapper(void *data) | |
74 | { | |
75 | struct rbd_args *args = data; | |
76 | ||
77 | execlp("rbd", "rbd", "unmap", args->rbd_name, (char *)NULL); | |
78 | ||
79 | return -1; | |
80 | } | |
81 | ||
82 | int rbd_delete_wrapper(void *data) | |
83 | { | |
84 | struct rbd_args *args = data; | |
85 | ||
86 | execlp("rbd", "rbd", "rm", args->rbd_name, (char *)NULL); | |
87 | ||
88 | return -1; | |
89 | } | |
90 | ||
10bc1861 CB |
91 | int rbd_clonepaths(struct lxc_storage *orig, struct lxc_storage *new, |
92 | const char *oldname, const char *cname, const char *oldpath, | |
93 | const char *lxcpath, int snap, uint64_t newsize, | |
94 | struct lxc_conf *conf) | |
3ceb2820 CB |
95 | { |
96 | ERROR("rbd clonepaths not implemented"); | |
97 | return -1; | |
98 | } | |
99 | ||
10bc1861 | 100 | int rbd_create(struct lxc_storage *bdev, const char *dest, const char *n, |
7b22b3e9 | 101 | struct bdev_specs *specs) |
3ceb2820 | 102 | { |
3b0e906f | 103 | const char *rbdpool, *fstype; |
3ceb2820 CB |
104 | uint64_t size; |
105 | int ret, len; | |
106 | char sz[24]; | |
a5b18cb1 | 107 | const char *cmd_args[2]; |
339de297 | 108 | char cmd_output[PATH_MAX]; |
3b0e906f CB |
109 | const char *rbdname = n; |
110 | struct rbd_args args = {0}; | |
3ceb2820 CB |
111 | |
112 | if (!specs) | |
113 | return -1; | |
114 | ||
115 | rbdpool = specs->rbd.rbdpool; | |
116 | if (!rbdpool) | |
117 | rbdpool = lxc_global_config_value("lxc.bdev.rbd.rbdpool"); | |
118 | ||
119 | if (specs->rbd.rbdname) | |
120 | rbdname = specs->rbd.rbdname; | |
121 | ||
122 | /* source device /dev/rbd/lxc/ctn */ | |
43bd0ebf | 123 | len = strlen(rbdpool) + strlen(rbdname) + 4 + 11; |
3ceb2820 | 124 | bdev->src = malloc(len); |
3b0e906f CB |
125 | if (!bdev->src) { |
126 | ERROR("Failed to allocate memory"); | |
3ceb2820 | 127 | return -1; |
3b0e906f | 128 | } |
3ceb2820 | 129 | |
43bd0ebf | 130 | ret = snprintf(bdev->src, len, "rbd:/dev/rbd/%s/%s", rbdpool, rbdname); |
3b0e906f CB |
131 | if (ret < 0 || ret >= len) { |
132 | ERROR("Failed to create string"); | |
3ceb2820 | 133 | return -1; |
3b0e906f | 134 | } |
3ceb2820 | 135 | |
7b22b3e9 | 136 | /* fssize is in bytes */ |
3ceb2820 CB |
137 | size = specs->fssize; |
138 | if (!size) | |
139 | size = DEFAULT_FS_SIZE; | |
140 | ||
7b22b3e9 CB |
141 | /* in megabytes for rbd tool */ |
142 | ret = snprintf(sz, 24, "%" PRIu64, size / 1024 / 1024); | |
3b0e906f CB |
143 | if (ret < 0 || ret >= 24) { |
144 | ERROR("Failed to create string"); | |
3ceb2820 | 145 | return -1; |
3ceb2820 | 146 | } |
3ceb2820 | 147 | |
3b0e906f CB |
148 | args.osd_pool_name = rbdpool; |
149 | args.rbd_name = rbdname; | |
150 | args.size = sz; | |
151 | ret = run_command(cmd_output, sizeof(cmd_output), rbd_create_wrapper, | |
152 | (void *)&args); | |
153 | if (ret < 0) { | |
154 | ERROR("Failed to create rbd storage volume \"%s\": %s", rbdname, | |
155 | cmd_output); | |
3ceb2820 | 156 | return -1; |
3ceb2820 | 157 | } |
3b0e906f CB |
158 | |
159 | ret = run_command(cmd_output, sizeof(cmd_output), rbd_map_wrapper, | |
160 | (void *)&args); | |
161 | if (ret < 0) { | |
162 | ERROR("Failed to map rbd storage volume \"%s\": %s", rbdname, | |
163 | cmd_output); | |
3ceb2820 | 164 | return -1; |
3b0e906f | 165 | } |
3ceb2820 CB |
166 | |
167 | fstype = specs->fstype; | |
168 | if (!fstype) | |
169 | fstype = DEFAULT_FSTYPE; | |
170 | ||
a5b18cb1 | 171 | cmd_args[0] = fstype; |
3b0e906f | 172 | cmd_args[1] = lxc_storage_get_path(bdev->src, bdev->type); |
a5b18cb1 CB |
173 | ret = run_command(cmd_output, sizeof(cmd_output), do_mkfs_exec_wrapper, |
174 | (void *)cmd_args); | |
3b0e906f CB |
175 | if (ret < 0) { |
176 | ERROR("Failed to map rbd storage volume \"%s\": %s", rbdname, | |
177 | cmd_output); | |
3ceb2820 | 178 | return -1; |
3b0e906f | 179 | } |
a5b18cb1 | 180 | |
3b0e906f CB |
181 | bdev->dest = strdup(dest); |
182 | if (!bdev->dest) { | |
183 | ERROR("Failed to duplicate string \"%s\"", dest); | |
3ceb2820 | 184 | return -1; |
3b0e906f | 185 | } |
3ceb2820 | 186 | |
3b0e906f CB |
187 | ret = mkdir_p(bdev->dest, 0755); |
188 | if (ret < 0 && errno != EEXIST) { | |
189 | ERROR("Failed to create directory \"%s\"", bdev->dest); | |
3ceb2820 CB |
190 | return -1; |
191 | } | |
192 | ||
3b0e906f | 193 | TRACE("Created rbd storage volume \"%s\"", bdev->dest); |
3ceb2820 CB |
194 | return 0; |
195 | } | |
196 | ||
10bc1861 | 197 | int rbd_destroy(struct lxc_storage *orig) |
3ceb2820 | 198 | { |
32068050 | 199 | __do_free char *rbdfullname = NULL; |
3b0e906f | 200 | int ret; |
41dc7155 | 201 | const char *src; |
339de297 | 202 | char cmd_output[PATH_MAX]; |
3b0e906f | 203 | struct rbd_args args = {0}; |
43f984ea | 204 | size_t len; |
3ceb2820 | 205 | |
43bd0ebf CB |
206 | src = lxc_storage_get_path(orig->src, orig->type); |
207 | if (file_exists(src)) { | |
3b0e906f CB |
208 | args.rbd_name = src; |
209 | ret = run_command(cmd_output, sizeof(cmd_output), | |
210 | rbd_unmap_wrapper, (void *)&args); | |
211 | if (ret < 0) { | |
212 | ERROR("Failed to map rbd storage volume \"%s\": %s", | |
213 | src, cmd_output); | |
3ceb2820 | 214 | return -1; |
3ceb2820 | 215 | } |
3ceb2820 CB |
216 | } |
217 | ||
43f984ea | 218 | len = strlen(src); |
32068050 | 219 | rbdfullname = must_realloc(NULL, len - 8); |
43f984ea | 220 | (void)strlcpy(rbdfullname, &src[9], len - 8); |
3b0e906f | 221 | args.rbd_name = rbdfullname; |
43f984ea | 222 | |
3b0e906f CB |
223 | ret = run_command(cmd_output, sizeof(cmd_output), |
224 | rbd_delete_wrapper, (void *)&args); | |
225 | if (ret < 0) { | |
226 | ERROR("Failed to delete rbd storage volume \"%s\": %s", | |
227 | rbdfullname, cmd_output); | |
3ceb2820 | 228 | return -1; |
3ceb2820 | 229 | } |
3b0e906f CB |
230 | |
231 | return 0; | |
3ceb2820 CB |
232 | } |
233 | ||
3d2ae1e2 | 234 | bool rbd_detect(const char *path) |
3ceb2820 | 235 | { |
f7ac4459 | 236 | if (!strncmp(path, "rbd:", 4)) |
3d2ae1e2 | 237 | return true; |
f7ac4459 CB |
238 | |
239 | if (!strncmp(path, "/dev/rbd/", 9)) | |
3d2ae1e2 | 240 | return true; |
f7ac4459 | 241 | |
3d2ae1e2 | 242 | return false; |
3ceb2820 CB |
243 | } |
244 | ||
10bc1861 | 245 | int rbd_mount(struct lxc_storage *bdev) |
3ceb2820 | 246 | { |
41dc7155 | 247 | const char *src; |
3b0e906f | 248 | |
3ceb2820 CB |
249 | if (strcmp(bdev->type, "rbd")) |
250 | return -22; | |
43bd0ebf | 251 | |
3ceb2820 CB |
252 | if (!bdev->src || !bdev->dest) |
253 | return -22; | |
254 | ||
43bd0ebf CB |
255 | src = lxc_storage_get_path(bdev->src, bdev->type); |
256 | if (!file_exists(src)) { | |
7b22b3e9 CB |
257 | /* If blkdev does not exist it should be mapped, because it is |
258 | * not persistent on reboot. | |
259 | */ | |
3ceb2820 CB |
260 | ERROR("Block device %s is not mapped.", bdev->src); |
261 | return -1; | |
262 | } | |
263 | ||
3b0e906f | 264 | return mount_unknown_fs(src, bdev->dest, bdev->mntopts); |
3ceb2820 CB |
265 | } |
266 | ||
10bc1861 | 267 | int rbd_umount(struct lxc_storage *bdev) |
3ceb2820 CB |
268 | { |
269 | if (strcmp(bdev->type, "rbd")) | |
270 | return -22; | |
43bd0ebf | 271 | |
3ceb2820 CB |
272 | if (!bdev->src || !bdev->dest) |
273 | return -22; | |
43bd0ebf | 274 | |
3ceb2820 CB |
275 | return umount(bdev->dest); |
276 | } |