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db9ecf05 | 1 | /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
80750adb ZJS |
2 | |
3 | #include <errno.h> | |
4 | #include <fcntl.h> | |
385de88a | 5 | #include <getopt.h> |
01234e1f | 6 | #include <linux/btrfs.h> |
80750adb ZJS |
7 | #include <linux/magic.h> |
8 | #include <sys/ioctl.h> | |
9 | #include <sys/mount.h> | |
80750adb ZJS |
10 | #include <sys/types.h> |
11 | #include <sys/vfs.h> | |
12 | ||
0f79b346 DT |
13 | #include "sd-device.h" |
14 | ||
18c528e9 | 15 | #include "blockdev-util.h" |
67f0ac8c | 16 | #include "btrfs-util.h" |
d6b4d1c7 | 17 | #include "build.h" |
1e2f3230 | 18 | #include "cryptsetup-util.h" |
80750adb | 19 | #include "device-nodes.h" |
0f79b346 | 20 | #include "device-util.h" |
7176f06c | 21 | #include "devnum-util.h" |
c34b75a1 | 22 | #include "dissect-image.h" |
80750adb ZJS |
23 | #include "escape.h" |
24 | #include "fd-util.h" | |
25 | #include "format-util.h" | |
26 | #include "log.h" | |
2b82a99f | 27 | #include "main-func.h" |
049af8ad | 28 | #include "mountpoint-util.h" |
80750adb | 29 | #include "parse-util.h" |
294bf0c3 | 30 | #include "pretty-print.h" |
d6f1e660 | 31 | #include "resize-fs.h" |
80750adb | 32 | |
088c49c3 LP |
33 | static const char *arg_target = NULL; |
34 | static bool arg_dry_run = false; | |
385de88a | 35 | |
80088c7e | 36 | #if HAVE_LIBCRYPTSETUP |
c34b75a1 | 37 | static int resize_crypt_luks_device(dev_t devno, const char *fstype, dev_t main_devno) { |
ca822829 | 38 | _cleanup_free_ char *devpath = NULL, *main_devpath = NULL; |
0d12936d | 39 | _cleanup_(sym_crypt_freep) struct crypt_device *cd = NULL; |
254d1313 | 40 | _cleanup_close_ int main_devfd = -EBADF; |
c34b75a1 ZJS |
41 | uint64_t size; |
42 | int r; | |
43 | ||
0d12936d LP |
44 | r = dlopen_cryptsetup(); |
45 | if (r < 0) | |
46 | return log_error_errno(r, "Cannot resize LUKS device: %m"); | |
47 | ||
ca822829 | 48 | main_devfd = r = device_open_from_devnum(S_IFBLK, main_devno, O_RDONLY|O_CLOEXEC, &main_devpath); |
0f79b346 | 49 | if (r < 0) |
ca822829 | 50 | return log_error_errno(r, "Failed to open main block device " DEVNUM_FORMAT_STR ": %m", |
0f79b346 DT |
51 | DEVNUM_FORMAT_VAL(main_devno)); |
52 | ||
c34b75a1 ZJS |
53 | if (ioctl(main_devfd, BLKGETSIZE64, &size) != 0) |
54 | return log_error_errno(errno, "Failed to query size of \"%s\" (before resize): %m", | |
55 | main_devpath); | |
56 | ||
57 | log_debug("%s is %"PRIu64" bytes", main_devpath, size); | |
0f79b346 | 58 | |
4fe46c34 | 59 | r = devname_from_devnum(S_IFBLK, devno, &devpath); |
54b22b26 | 60 | if (r < 0) |
ca822829 YW |
61 | return log_error_errno(r, "Failed to get devpath of " DEVNUM_FORMAT_STR ": %m", |
62 | DEVNUM_FORMAT_VAL(devno)); | |
c34b75a1 | 63 | |
0d12936d | 64 | r = sym_crypt_init(&cd, devpath); |
c34b75a1 ZJS |
65 | if (r < 0) |
66 | return log_error_errno(r, "crypt_init(\"%s\") failed: %m", devpath); | |
67 | ||
efc3b12f | 68 | cryptsetup_enable_logging(cd); |
c34b75a1 | 69 | |
0d12936d | 70 | r = sym_crypt_load(cd, CRYPT_LUKS, NULL); |
c34b75a1 ZJS |
71 | if (r < 0) |
72 | return log_debug_errno(r, "Failed to load LUKS metadata for %s: %m", devpath); | |
73 | ||
385de88a ZJS |
74 | if (arg_dry_run) |
75 | return 0; | |
76 | ||
0d12936d | 77 | r = sym_crypt_resize(cd, main_devpath, 0); |
c34b75a1 ZJS |
78 | if (r < 0) |
79 | return log_error_errno(r, "crypt_resize() of %s failed: %m", devpath); | |
80 | ||
81 | if (ioctl(main_devfd, BLKGETSIZE64, &size) != 0) | |
82 | log_warning_errno(errno, "Failed to query size of \"%s\" (after resize): %m", | |
83 | devpath); | |
84 | else | |
85 | log_debug("%s is now %"PRIu64" bytes", main_devpath, size); | |
86 | ||
87 | return 1; | |
88 | } | |
80088c7e | 89 | #endif |
c34b75a1 | 90 | |
a39cc90d LP |
91 | static int maybe_resize_underlying_device( |
92 | int mountfd, | |
93 | const char *mountpath, | |
94 | dev_t main_devno) { | |
95 | ||
ca822829 | 96 | _cleanup_free_ char *devpath = NULL, *fstype = NULL; |
c34b75a1 | 97 | dev_t devno; |
c34b75a1 ZJS |
98 | int r; |
99 | ||
a39cc90d LP |
100 | assert(mountfd >= 0); |
101 | assert(mountpath); | |
102 | ||
80088c7e | 103 | #if HAVE_LIBCRYPTSETUP |
efc3b12f | 104 | cryptsetup_enable_logging(NULL); |
80088c7e | 105 | #endif |
c34b75a1 | 106 | |
a39cc90d | 107 | r = get_block_device_harder_fd(mountfd, &devno); |
c34b75a1 ZJS |
108 | if (r < 0) |
109 | return log_error_errno(r, "Failed to determine underlying block device of \"%s\": %m", | |
110 | mountpath); | |
d161680e LP |
111 | if (devno == 0) |
112 | return log_error_errno(SYNTHETIC_ERRNO(ENODEV), "File system \"%s\" not backed by block device.", arg_target); | |
c34b75a1 | 113 | |
0f79b346 DT |
114 | log_debug("Underlying device " DEVNUM_FORMAT_STR ", main dev " DEVNUM_FORMAT_STR ", %s", |
115 | DEVNUM_FORMAT_VAL(devno), | |
116 | DEVNUM_FORMAT_VAL(main_devno), | |
c34b75a1 ZJS |
117 | devno == main_devno ? "same" : "different"); |
118 | if (devno == main_devno) | |
119 | return 0; | |
120 | ||
4fe46c34 | 121 | r = devname_from_devnum(S_IFBLK, devno, &devpath); |
54b22b26 | 122 | if (r < 0) |
ca822829 | 123 | return log_error_errno(r, "Failed to get devpath for block device " DEVNUM_FORMAT_STR ": %m", |
0f79b346 DT |
124 | DEVNUM_FORMAT_VAL(devno)); |
125 | ||
c34b75a1 | 126 | r = probe_filesystem(devpath, &fstype); |
7cc84b2c ZJS |
127 | if (r == -EUCLEAN) |
128 | return log_warning_errno(r, "Cannot reliably determine probe \"%s\", refusing to proceed.", devpath); | |
c34b75a1 ZJS |
129 | if (r < 0) |
130 | return log_warning_errno(r, "Failed to probe \"%s\": %m", devpath); | |
131 | ||
80088c7e | 132 | #if HAVE_LIBCRYPTSETUP |
c34b75a1 ZJS |
133 | if (streq_ptr(fstype, "crypto_LUKS")) |
134 | return resize_crypt_luks_device(devno, fstype, main_devno); | |
80088c7e | 135 | #endif |
c34b75a1 | 136 | |
d6f1e660 | 137 | log_debug("Don't know how to resize %s of type %s, ignoring.", devpath, strnull(fstype)); |
c34b75a1 ZJS |
138 | return 0; |
139 | } | |
140 | ||
37ec0fdd LP |
141 | static int help(void) { |
142 | _cleanup_free_ char *link = NULL; | |
143 | int r; | |
144 | ||
145 | r = terminal_urlify_man("systemd-growfs@.service", "8", &link); | |
146 | if (r < 0) | |
147 | return log_oom(); | |
148 | ||
385de88a ZJS |
149 | printf("%s [OPTIONS...] /path/to/mountpoint\n\n" |
150 | "Grow filesystem or encrypted payload to device size.\n\n" | |
151 | "Options:\n" | |
152 | " -h --help Show this help and exit\n" | |
153 | " --version Print version string and exit\n" | |
154 | " -n --dry-run Just print what would be done\n" | |
bc556335 DDM |
155 | "\nSee the %s for details.\n", |
156 | program_invocation_short_name, | |
157 | link); | |
37ec0fdd LP |
158 | |
159 | return 0; | |
385de88a ZJS |
160 | } |
161 | ||
162 | static int parse_argv(int argc, char *argv[]) { | |
163 | enum { | |
164 | ARG_VERSION = 0x100, | |
165 | }; | |
166 | ||
167 | int c; | |
168 | ||
169 | static const struct option options[] = { | |
170 | { "help", no_argument, NULL, 'h' }, | |
171 | { "version" , no_argument, NULL, ARG_VERSION }, | |
172 | { "dry-run", no_argument, NULL, 'n' }, | |
173 | {} | |
174 | }; | |
175 | ||
176 | assert(argc >= 0); | |
177 | assert(argv); | |
178 | ||
179 | while ((c = getopt_long(argc, argv, "hn", options, NULL)) >= 0) | |
79893116 | 180 | switch (c) { |
385de88a | 181 | case 'h': |
37ec0fdd | 182 | return help(); |
385de88a ZJS |
183 | |
184 | case ARG_VERSION: | |
37ec0fdd | 185 | return version(); |
385de88a ZJS |
186 | |
187 | case 'n': | |
188 | arg_dry_run = true; | |
189 | break; | |
190 | ||
191 | case '?': | |
192 | return -EINVAL; | |
193 | ||
194 | default: | |
04499a70 | 195 | assert_not_reached(); |
385de88a ZJS |
196 | } |
197 | ||
baaa35ad ZJS |
198 | if (optind + 1 != argc) |
199 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), | |
200 | "%s excepts exactly one argument (the mount point).", | |
201 | program_invocation_short_name); | |
385de88a ZJS |
202 | |
203 | arg_target = argv[optind]; | |
204 | ||
205 | return 1; | |
206 | } | |
207 | ||
2b82a99f | 208 | static int run(int argc, char *argv[]) { |
254d1313 | 209 | _cleanup_close_ int mountfd = -EBADF, devfd = -EBADF; |
ca822829 | 210 | _cleanup_free_ char *devpath = NULL; |
d6f1e660 | 211 | uint64_t size, newsize; |
54b22b26 | 212 | dev_t devno; |
80750adb ZJS |
213 | int r; |
214 | ||
d2acb93d | 215 | log_setup(); |
80750adb | 216 | |
385de88a | 217 | r = parse_argv(argc, argv); |
2b82a99f ZJS |
218 | if (r <= 0) |
219 | return r; | |
385de88a ZJS |
220 | |
221 | r = path_is_mount_point(arg_target, NULL, 0); | |
2b82a99f ZJS |
222 | if (r < 0) |
223 | return log_error_errno(r, "Failed to check if \"%s\" is a mount point: %m", arg_target); | |
224 | if (r == 0) | |
225 | return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "\"%s\" is not a mount point: %m", arg_target); | |
80750adb | 226 | |
a39cc90d LP |
227 | mountfd = open(arg_target, O_RDONLY|O_CLOEXEC|O_DIRECTORY); |
228 | if (mountfd < 0) | |
229 | return log_error_errno(errno, "Failed to open \"%s\": %m", arg_target); | |
230 | ||
231 | r = get_block_device_fd(mountfd, &devno); | |
67f0ac8c LP |
232 | if (r == -EUCLEAN) |
233 | return btrfs_log_dev_root(LOG_ERR, r, arg_target); | |
2b82a99f ZJS |
234 | if (r < 0) |
235 | return log_error_errno(r, "Failed to determine block device of \"%s\": %m", arg_target); | |
d161680e LP |
236 | if (devno == 0) |
237 | return log_error_errno(SYNTHETIC_ERRNO(ENODEV), "File system \"%s\" not backed by block device.", arg_target); | |
80750adb | 238 | |
a39cc90d | 239 | r = maybe_resize_underlying_device(mountfd, arg_target, devno); |
c34b75a1 | 240 | if (r < 0) |
e9a28b8c | 241 | log_warning_errno(r, "Unable to resize underlying device of \"%s\", proceeding anyway: %m", arg_target); |
c34b75a1 | 242 | |
ca822829 | 243 | devfd = r = device_open_from_devnum(S_IFBLK, devno, O_RDONLY|O_CLOEXEC, &devpath); |
0f79b346 | 244 | if (r < 0) |
ca822829 | 245 | return log_error_errno(r, "Failed to open block device " DEVNUM_FORMAT_STR ": %m", |
0f79b346 DT |
246 | DEVNUM_FORMAT_VAL(devno)); |
247 | ||
2b82a99f ZJS |
248 | if (ioctl(devfd, BLKGETSIZE64, &size) != 0) |
249 | return log_error_errno(errno, "Failed to query size of \"%s\": %m", devpath); | |
80750adb | 250 | |
d6f1e660 | 251 | log_debug("Resizing \"%s\" to %"PRIu64" bytes...", arg_target, size); |
d26c0f72 | 252 | |
253 | if (arg_dry_run) | |
254 | return 0; | |
255 | ||
d6f1e660 ZJS |
256 | r = resize_fs(mountfd, size, &newsize); |
257 | if (r < 0) | |
258 | return log_error_errno(r, "Failed to resize \"%s\" to %"PRIu64" bytes: %m", | |
259 | arg_target, size); | |
260 | if (newsize == size) | |
261 | log_info("Successfully resized \"%s\" to %s bytes.", | |
262 | arg_target, | |
2b59bf51 | 263 | FORMAT_BYTES(newsize)); |
d6f1e660 ZJS |
264 | else |
265 | log_info("Successfully resized \"%s\" to %s bytes (%"PRIu64" bytes lost due to blocksize).", | |
266 | arg_target, | |
2b59bf51 | 267 | FORMAT_BYTES(newsize), |
d6f1e660 ZJS |
268 | size - newsize); |
269 | return 0; | |
80750adb | 270 | } |
2b82a99f ZJS |
271 | |
272 | DEFINE_MAIN_FUNCTION(run); |