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80750adb | 1 | /* SPDX-License-Identifier: LGPL-2.1+ */ |
80750adb ZJS |
2 | |
3 | #include <errno.h> | |
4 | #include <fcntl.h> | |
385de88a | 5 | #include <getopt.h> |
80750adb ZJS |
6 | #include <linux/magic.h> |
7 | #include <sys/ioctl.h> | |
8 | #include <sys/mount.h> | |
9 | #include <sys/stat.h> | |
10 | #include <sys/types.h> | |
11 | #include <sys/vfs.h> | |
12 | ||
18c528e9 | 13 | #include "blockdev-util.h" |
c34b75a1 | 14 | #include "crypt-util.h" |
80750adb | 15 | #include "device-nodes.h" |
c34b75a1 | 16 | #include "dissect-image.h" |
80750adb ZJS |
17 | #include "escape.h" |
18 | #include "fd-util.h" | |
19 | #include "format-util.h" | |
20 | #include "log.h" | |
21 | #include "missing.h" | |
049af8ad | 22 | #include "mountpoint-util.h" |
80750adb ZJS |
23 | #include "parse-util.h" |
24 | #include "path-util.h" | |
294bf0c3 | 25 | #include "pretty-print.h" |
54b22b26 | 26 | #include "stat-util.h" |
80750adb ZJS |
27 | #include "strv.h" |
28 | ||
088c49c3 LP |
29 | static const char *arg_target = NULL; |
30 | static bool arg_dry_run = false; | |
385de88a | 31 | |
76d3e083 | 32 | static int resize_ext4(const char *path, int mountfd, int devfd, uint64_t numblocks, uint64_t blocksize) { |
80750adb ZJS |
33 | assert((uint64_t) (int) blocksize == blocksize); |
34 | ||
385de88a ZJS |
35 | if (arg_dry_run) |
36 | return 0; | |
37 | ||
80750adb | 38 | if (ioctl(mountfd, EXT4_IOC_RESIZE_FS, &numblocks) != 0) |
76d3e083 ZJS |
39 | return log_error_errno(errno, "Failed to resize \"%s\" to %"PRIu64" blocks (ext4): %m", |
40 | path, numblocks); | |
80750adb ZJS |
41 | |
42 | return 0; | |
43 | } | |
44 | ||
76d3e083 | 45 | static int resize_btrfs(const char *path, int mountfd, int devfd, uint64_t numblocks, uint64_t blocksize) { |
80750adb ZJS |
46 | struct btrfs_ioctl_vol_args args = {}; |
47 | int r; | |
48 | ||
49 | assert((uint64_t) (int) blocksize == blocksize); | |
50 | ||
76d3e083 ZJS |
51 | /* https://bugzilla.kernel.org/show_bug.cgi?id=118111 */ |
52 | if (numblocks * blocksize < 256*1024*1024) { | |
53 | log_warning("%s: resizing of btrfs volumes smaller than 256M is not supported", path); | |
54 | return -EOPNOTSUPP; | |
55 | } | |
56 | ||
80750adb ZJS |
57 | r = snprintf(args.name, sizeof(args.name), "%"PRIu64, numblocks * blocksize); |
58 | /* The buffer is large enough for any number to fit... */ | |
59 | assert((size_t) r < sizeof(args.name)); | |
60 | ||
385de88a ZJS |
61 | if (arg_dry_run) |
62 | return 0; | |
63 | ||
80750adb | 64 | if (ioctl(mountfd, BTRFS_IOC_RESIZE, &args) != 0) |
76d3e083 ZJS |
65 | return log_error_errno(errno, "Failed to resize \"%s\" to %"PRIu64" blocks (btrfs): %m", |
66 | path, numblocks); | |
80750adb ZJS |
67 | |
68 | return 0; | |
69 | } | |
70 | ||
80088c7e | 71 | #if HAVE_LIBCRYPTSETUP |
c34b75a1 | 72 | static int resize_crypt_luks_device(dev_t devno, const char *fstype, dev_t main_devno) { |
54b22b26 | 73 | _cleanup_free_ char *devpath = NULL, *main_devpath = NULL; |
c34b75a1 | 74 | _cleanup_(crypt_freep) struct crypt_device *cd = NULL; |
54b22b26 | 75 | _cleanup_close_ int main_devfd = -1; |
c34b75a1 ZJS |
76 | uint64_t size; |
77 | int r; | |
78 | ||
54b22b26 LP |
79 | r = device_path_make_major_minor(S_IFBLK, main_devno, &main_devpath); |
80 | if (r < 0) | |
81 | return log_error_errno(r, "Failed to format device major/minor path: %m"); | |
82 | ||
c34b75a1 ZJS |
83 | main_devfd = open(main_devpath, O_RDONLY|O_CLOEXEC); |
84 | if (main_devfd < 0) | |
85 | return log_error_errno(errno, "Failed to open \"%s\": %m", main_devpath); | |
86 | ||
87 | if (ioctl(main_devfd, BLKGETSIZE64, &size) != 0) | |
88 | return log_error_errno(errno, "Failed to query size of \"%s\" (before resize): %m", | |
89 | main_devpath); | |
90 | ||
91 | log_debug("%s is %"PRIu64" bytes", main_devpath, size); | |
54b22b26 LP |
92 | r = device_path_make_major_minor(S_IFBLK, devno, &devpath); |
93 | if (r < 0) | |
94 | return log_error_errno(r, "Failed to format major/minor path: %m"); | |
c34b75a1 | 95 | |
c34b75a1 ZJS |
96 | r = crypt_init(&cd, devpath); |
97 | if (r < 0) | |
98 | return log_error_errno(r, "crypt_init(\"%s\") failed: %m", devpath); | |
99 | ||
100 | crypt_set_log_callback(cd, cryptsetup_log_glue, NULL); | |
101 | ||
102 | r = crypt_load(cd, CRYPT_LUKS, NULL); | |
103 | if (r < 0) | |
104 | return log_debug_errno(r, "Failed to load LUKS metadata for %s: %m", devpath); | |
105 | ||
385de88a ZJS |
106 | if (arg_dry_run) |
107 | return 0; | |
108 | ||
c34b75a1 ZJS |
109 | r = crypt_resize(cd, main_devpath, 0); |
110 | if (r < 0) | |
111 | return log_error_errno(r, "crypt_resize() of %s failed: %m", devpath); | |
112 | ||
113 | if (ioctl(main_devfd, BLKGETSIZE64, &size) != 0) | |
114 | log_warning_errno(errno, "Failed to query size of \"%s\" (after resize): %m", | |
115 | devpath); | |
116 | else | |
117 | log_debug("%s is now %"PRIu64" bytes", main_devpath, size); | |
118 | ||
119 | return 1; | |
120 | } | |
80088c7e | 121 | #endif |
c34b75a1 ZJS |
122 | |
123 | static int maybe_resize_slave_device(const char *mountpath, dev_t main_devno) { | |
54b22b26 | 124 | _cleanup_free_ char *fstype = NULL, *devpath = NULL; |
c34b75a1 | 125 | dev_t devno; |
c34b75a1 ZJS |
126 | int r; |
127 | ||
80088c7e | 128 | #if HAVE_LIBCRYPTSETUP |
c34b75a1 ZJS |
129 | crypt_set_log_callback(NULL, cryptsetup_log_glue, NULL); |
130 | crypt_set_debug_level(1); | |
80088c7e | 131 | #endif |
c34b75a1 ZJS |
132 | |
133 | r = get_block_device_harder(mountpath, &devno); | |
134 | if (r < 0) | |
135 | return log_error_errno(r, "Failed to determine underlying block device of \"%s\": %m", | |
136 | mountpath); | |
137 | ||
138 | log_debug("Underlying device %d:%d, main dev %d:%d, %s", | |
139 | major(devno), minor(devno), | |
140 | major(main_devno), minor(main_devno), | |
141 | devno == main_devno ? "same" : "different"); | |
142 | if (devno == main_devno) | |
143 | return 0; | |
144 | ||
54b22b26 LP |
145 | r = device_path_make_major_minor(S_IFBLK, devno, &devpath); |
146 | if (r < 0) | |
147 | return log_error_errno(r, "Failed to format device major/minor path: %m"); | |
148 | ||
c34b75a1 | 149 | r = probe_filesystem(devpath, &fstype); |
7cc84b2c ZJS |
150 | if (r == -EUCLEAN) |
151 | return log_warning_errno(r, "Cannot reliably determine probe \"%s\", refusing to proceed.", devpath); | |
c34b75a1 ZJS |
152 | if (r < 0) |
153 | return log_warning_errno(r, "Failed to probe \"%s\": %m", devpath); | |
154 | ||
80088c7e | 155 | #if HAVE_LIBCRYPTSETUP |
c34b75a1 ZJS |
156 | if (streq_ptr(fstype, "crypto_LUKS")) |
157 | return resize_crypt_luks_device(devno, fstype, main_devno); | |
80088c7e | 158 | #endif |
c34b75a1 ZJS |
159 | |
160 | log_debug("Don't know how to resize %s of type %s, ignoring", devpath, strnull(fstype)); | |
161 | return 0; | |
162 | } | |
163 | ||
37ec0fdd LP |
164 | static int help(void) { |
165 | _cleanup_free_ char *link = NULL; | |
166 | int r; | |
167 | ||
168 | r = terminal_urlify_man("systemd-growfs@.service", "8", &link); | |
169 | if (r < 0) | |
170 | return log_oom(); | |
171 | ||
385de88a ZJS |
172 | printf("%s [OPTIONS...] /path/to/mountpoint\n\n" |
173 | "Grow filesystem or encrypted payload to device size.\n\n" | |
174 | "Options:\n" | |
175 | " -h --help Show this help and exit\n" | |
176 | " --version Print version string and exit\n" | |
177 | " -n --dry-run Just print what would be done\n" | |
37ec0fdd LP |
178 | "\nSee the %s for details.\n" |
179 | , program_invocation_short_name | |
180 | , link | |
181 | ); | |
182 | ||
183 | return 0; | |
385de88a ZJS |
184 | } |
185 | ||
186 | static int parse_argv(int argc, char *argv[]) { | |
187 | enum { | |
188 | ARG_VERSION = 0x100, | |
189 | }; | |
190 | ||
191 | int c; | |
192 | ||
193 | static const struct option options[] = { | |
194 | { "help", no_argument, NULL, 'h' }, | |
195 | { "version" , no_argument, NULL, ARG_VERSION }, | |
196 | { "dry-run", no_argument, NULL, 'n' }, | |
197 | {} | |
198 | }; | |
199 | ||
200 | assert(argc >= 0); | |
201 | assert(argv); | |
202 | ||
203 | while ((c = getopt_long(argc, argv, "hn", options, NULL)) >= 0) | |
204 | switch(c) { | |
205 | case 'h': | |
37ec0fdd | 206 | return help(); |
385de88a ZJS |
207 | |
208 | case ARG_VERSION: | |
37ec0fdd | 209 | return version(); |
385de88a ZJS |
210 | |
211 | case 'n': | |
212 | arg_dry_run = true; | |
213 | break; | |
214 | ||
215 | case '?': | |
216 | return -EINVAL; | |
217 | ||
218 | default: | |
219 | assert_not_reached("Unhandled option"); | |
220 | } | |
221 | ||
baaa35ad ZJS |
222 | if (optind + 1 != argc) |
223 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
224 | "%s excepts exactly one argument (the mount point).", | |
225 | program_invocation_short_name); | |
385de88a ZJS |
226 | |
227 | arg_target = argv[optind]; | |
228 | ||
229 | return 1; | |
230 | } | |
231 | ||
80750adb | 232 | int main(int argc, char *argv[]) { |
80750adb | 233 | _cleanup_close_ int mountfd = -1, devfd = -1; |
54b22b26 | 234 | _cleanup_free_ char *devpath = NULL; |
80750adb | 235 | uint64_t size, numblocks; |
54b22b26 | 236 | char fb[FORMAT_BYTES_MAX]; |
80750adb | 237 | struct statfs sfs; |
54b22b26 LP |
238 | dev_t devno; |
239 | int blocksize; | |
80750adb ZJS |
240 | int r; |
241 | ||
6bf3c61c | 242 | log_setup_service(); |
80750adb | 243 | |
385de88a ZJS |
244 | r = parse_argv(argc, argv); |
245 | if (r < 0) | |
246 | return EXIT_FAILURE; | |
247 | if (r == 0) | |
248 | return EXIT_SUCCESS; | |
249 | ||
250 | r = path_is_mount_point(arg_target, NULL, 0); | |
80750adb | 251 | if (r < 0) { |
385de88a | 252 | log_error_errno(r, "Failed to check if \"%s\" is a mount point: %m", arg_target); |
80750adb ZJS |
253 | return EXIT_FAILURE; |
254 | } | |
255 | if (r == 0) { | |
385de88a | 256 | log_error_errno(r, "\"%s\" is not a mount point: %m", arg_target); |
80750adb ZJS |
257 | return EXIT_FAILURE; |
258 | } | |
259 | ||
385de88a | 260 | r = get_block_device(arg_target, &devno); |
80750adb | 261 | if (r < 0) { |
385de88a | 262 | log_error_errno(r, "Failed to determine block device of \"%s\": %m", arg_target); |
80750adb ZJS |
263 | return EXIT_FAILURE; |
264 | } | |
265 | ||
385de88a | 266 | r = maybe_resize_slave_device(arg_target, devno); |
c34b75a1 ZJS |
267 | if (r < 0) |
268 | return EXIT_FAILURE; | |
269 | ||
385de88a | 270 | mountfd = open(arg_target, O_RDONLY|O_CLOEXEC); |
80750adb | 271 | if (mountfd < 0) { |
385de88a | 272 | log_error_errno(errno, "Failed to open \"%s\": %m", arg_target); |
80750adb ZJS |
273 | return EXIT_FAILURE; |
274 | } | |
275 | ||
54b22b26 LP |
276 | r = device_path_make_major_minor(S_IFBLK, devno, &devpath); |
277 | if (r < 0) { | |
278 | log_error_errno(r, "Failed to format device major/minor path: %m"); | |
279 | return EXIT_FAILURE; | |
280 | } | |
281 | ||
80750adb ZJS |
282 | devfd = open(devpath, O_RDONLY|O_CLOEXEC); |
283 | if (devfd < 0) { | |
284 | log_error_errno(errno, "Failed to open \"%s\": %m", devpath); | |
285 | return EXIT_FAILURE; | |
286 | } | |
287 | ||
288 | if (ioctl(devfd, BLKBSZGET, &blocksize) != 0) { | |
289 | log_error_errno(errno, "Failed to query block size of \"%s\": %m", devpath); | |
290 | return EXIT_FAILURE; | |
291 | } | |
292 | ||
293 | if (ioctl(devfd, BLKGETSIZE64, &size) != 0) { | |
294 | log_error_errno(errno, "Failed to query size of \"%s\": %m", devpath); | |
295 | return EXIT_FAILURE; | |
296 | } | |
297 | ||
298 | if (size % blocksize != 0) | |
299 | log_notice("Partition size %"PRIu64" is not a multiple of the blocksize %d," | |
300 | " ignoring %"PRIu64" bytes", size, blocksize, size % blocksize); | |
301 | ||
302 | numblocks = size / blocksize; | |
303 | ||
304 | if (fstatfs(mountfd, &sfs) < 0) { | |
385de88a | 305 | log_error_errno(errno, "Failed to stat file system \"%s\": %m", arg_target); |
80750adb ZJS |
306 | return EXIT_FAILURE; |
307 | } | |
308 | ||
309 | switch(sfs.f_type) { | |
310 | case EXT4_SUPER_MAGIC: | |
385de88a | 311 | r = resize_ext4(arg_target, mountfd, devfd, numblocks, blocksize); |
80750adb ZJS |
312 | break; |
313 | case BTRFS_SUPER_MAGIC: | |
385de88a | 314 | r = resize_btrfs(arg_target, mountfd, devfd, numblocks, blocksize); |
80750adb ZJS |
315 | break; |
316 | default: | |
317 | log_error("Don't know how to resize fs %llx on \"%s\"", | |
385de88a | 318 | (long long unsigned) sfs.f_type, arg_target); |
80750adb ZJS |
319 | return EXIT_FAILURE; |
320 | } | |
321 | ||
76d3e083 | 322 | if (r < 0) |
80750adb | 323 | return EXIT_FAILURE; |
80750adb ZJS |
324 | |
325 | log_info("Successfully resized \"%s\" to %s bytes (%"PRIu64" blocks of %d bytes).", | |
385de88a | 326 | arg_target, format_bytes(fb, sizeof fb, size), numblocks, blocksize); |
80750adb ZJS |
327 | return EXIT_SUCCESS; |
328 | } |