| /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
| |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <getopt.h> |
| #include <linux/magic.h> |
| #include <sys/ioctl.h> |
| #include <sys/mount.h> |
| #include <sys/types.h> |
| #include <sys/vfs.h> |
| /* This needs to be included after sys/mount.h, as since [0] linux/btrfs.h |
| * includes linux/fs.h causing build errors |
| * See: https://github.com/systemd/systemd/issues/8507 |
| * [0] https://github.com/torvalds/linux/commit/a28135303a669917002f569aecebd5758263e4aa |
| */ |
| #include <linux/btrfs.h> |
| |
| #include "sd-device.h" |
| |
| #include "blockdev-util.h" |
| #include "btrfs-util.h" |
| #include "build.h" |
| #include "cryptsetup-util.h" |
| #include "device-nodes.h" |
| #include "device-util.h" |
| #include "devnum-util.h" |
| #include "dissect-image.h" |
| #include "escape.h" |
| #include "fd-util.h" |
| #include "format-util.h" |
| #include "log.h" |
| #include "main-func.h" |
| #include "mountpoint-util.h" |
| #include "parse-util.h" |
| #include "pretty-print.h" |
| #include "resize-fs.h" |
| |
| static const char *arg_target = NULL; |
| static bool arg_dry_run = false; |
| |
| #if HAVE_LIBCRYPTSETUP |
| static int resize_crypt_luks_device(dev_t devno, const char *fstype, dev_t main_devno) { |
| _cleanup_free_ char *devpath = NULL, *main_devpath = NULL; |
| _cleanup_(sym_crypt_freep) struct crypt_device *cd = NULL; |
| _cleanup_close_ int main_devfd = -EBADF; |
| uint64_t size; |
| int r; |
| |
| r = dlopen_cryptsetup(); |
| if (r < 0) |
| return log_error_errno(r, "Cannot resize LUKS device: %m"); |
| |
| main_devfd = r = device_open_from_devnum(S_IFBLK, main_devno, O_RDONLY|O_CLOEXEC, &main_devpath); |
| if (r < 0) |
| return log_error_errno(r, "Failed to open main block device " DEVNUM_FORMAT_STR ": %m", |
| DEVNUM_FORMAT_VAL(main_devno)); |
| |
| if (ioctl(main_devfd, BLKGETSIZE64, &size) != 0) |
| return log_error_errno(errno, "Failed to query size of \"%s\" (before resize): %m", |
| main_devpath); |
| |
| log_debug("%s is %"PRIu64" bytes", main_devpath, size); |
| |
| r = devname_from_devnum(S_IFBLK, devno, &devpath); |
| if (r < 0) |
| return log_error_errno(r, "Failed to get devpath of " DEVNUM_FORMAT_STR ": %m", |
| DEVNUM_FORMAT_VAL(devno)); |
| |
| r = sym_crypt_init(&cd, devpath); |
| if (r < 0) |
| return log_error_errno(r, "crypt_init(\"%s\") failed: %m", devpath); |
| |
| cryptsetup_enable_logging(cd); |
| |
| r = sym_crypt_load(cd, CRYPT_LUKS, NULL); |
| if (r < 0) |
| return log_debug_errno(r, "Failed to load LUKS metadata for %s: %m", devpath); |
| |
| if (arg_dry_run) |
| return 0; |
| |
| r = sym_crypt_resize(cd, main_devpath, 0); |
| if (r < 0) |
| return log_error_errno(r, "crypt_resize() of %s failed: %m", devpath); |
| |
| if (ioctl(main_devfd, BLKGETSIZE64, &size) != 0) |
| log_warning_errno(errno, "Failed to query size of \"%s\" (after resize): %m", |
| devpath); |
| else |
| log_debug("%s is now %"PRIu64" bytes", main_devpath, size); |
| |
| return 1; |
| } |
| #endif |
| |
| static int maybe_resize_underlying_device( |
| int mountfd, |
| const char *mountpath, |
| dev_t main_devno) { |
| |
| _cleanup_free_ char *devpath = NULL, *fstype = NULL; |
| dev_t devno; |
| int r; |
| |
| assert(mountfd >= 0); |
| assert(mountpath); |
| |
| #if HAVE_LIBCRYPTSETUP |
| cryptsetup_enable_logging(NULL); |
| #endif |
| |
| r = get_block_device_harder_fd(mountfd, &devno); |
| if (r < 0) |
| return log_error_errno(r, "Failed to determine underlying block device of \"%s\": %m", |
| mountpath); |
| if (devno == 0) |
| return log_error_errno(SYNTHETIC_ERRNO(ENODEV), "File system \"%s\" not backed by block device.", arg_target); |
| |
| log_debug("Underlying device " DEVNUM_FORMAT_STR ", main dev " DEVNUM_FORMAT_STR ", %s", |
| DEVNUM_FORMAT_VAL(devno), |
| DEVNUM_FORMAT_VAL(main_devno), |
| devno == main_devno ? "same" : "different"); |
| if (devno == main_devno) |
| return 0; |
| |
| r = devname_from_devnum(S_IFBLK, devno, &devpath); |
| if (r < 0) |
| return log_error_errno(r, "Failed to get devpath for block device " DEVNUM_FORMAT_STR ": %m", |
| DEVNUM_FORMAT_VAL(devno)); |
| |
| r = probe_filesystem(devpath, &fstype); |
| if (r == -EUCLEAN) |
| return log_warning_errno(r, "Cannot reliably determine probe \"%s\", refusing to proceed.", devpath); |
| if (r < 0) |
| return log_warning_errno(r, "Failed to probe \"%s\": %m", devpath); |
| |
| #if HAVE_LIBCRYPTSETUP |
| if (streq_ptr(fstype, "crypto_LUKS")) |
| return resize_crypt_luks_device(devno, fstype, main_devno); |
| #endif |
| |
| log_debug("Don't know how to resize %s of type %s, ignoring.", devpath, strnull(fstype)); |
| return 0; |
| } |
| |
| static int help(void) { |
| _cleanup_free_ char *link = NULL; |
| int r; |
| |
| r = terminal_urlify_man("systemd-growfs@.service", "8", &link); |
| if (r < 0) |
| return log_oom(); |
| |
| printf("%s [OPTIONS...] /path/to/mountpoint\n\n" |
| "Grow filesystem or encrypted payload to device size.\n\n" |
| "Options:\n" |
| " -h --help Show this help and exit\n" |
| " --version Print version string and exit\n" |
| " -n --dry-run Just print what would be done\n" |
| "\nSee the %s for details.\n", |
| program_invocation_short_name, |
| link); |
| |
| return 0; |
| } |
| |
| static int parse_argv(int argc, char *argv[]) { |
| enum { |
| ARG_VERSION = 0x100, |
| }; |
| |
| int c; |
| |
| static const struct option options[] = { |
| { "help", no_argument, NULL, 'h' }, |
| { "version" , no_argument, NULL, ARG_VERSION }, |
| { "dry-run", no_argument, NULL, 'n' }, |
| {} |
| }; |
| |
| assert(argc >= 0); |
| assert(argv); |
| |
| while ((c = getopt_long(argc, argv, "hn", options, NULL)) >= 0) |
| switch (c) { |
| case 'h': |
| return help(); |
| |
| case ARG_VERSION: |
| return version(); |
| |
| case 'n': |
| arg_dry_run = true; |
| break; |
| |
| case '?': |
| return -EINVAL; |
| |
| default: |
| assert_not_reached(); |
| } |
| |
| if (optind + 1 != argc) |
| return log_error_errno(SYNTHETIC_ERRNO(EINVAL), |
| "%s excepts exactly one argument (the mount point).", |
| program_invocation_short_name); |
| |
| arg_target = argv[optind]; |
| |
| return 1; |
| } |
| |
| static int run(int argc, char *argv[]) { |
| _cleanup_close_ int mountfd = -EBADF, devfd = -EBADF; |
| _cleanup_free_ char *devpath = NULL; |
| uint64_t size, newsize; |
| dev_t devno; |
| int r; |
| |
| log_setup(); |
| |
| r = parse_argv(argc, argv); |
| if (r <= 0) |
| return r; |
| |
| r = path_is_mount_point(arg_target, NULL, 0); |
| if (r < 0) |
| return log_error_errno(r, "Failed to check if \"%s\" is a mount point: %m", arg_target); |
| if (r == 0) |
| return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "\"%s\" is not a mount point: %m", arg_target); |
| |
| mountfd = open(arg_target, O_RDONLY|O_CLOEXEC|O_DIRECTORY); |
| if (mountfd < 0) |
| return log_error_errno(errno, "Failed to open \"%s\": %m", arg_target); |
| |
| r = get_block_device_fd(mountfd, &devno); |
| if (r == -EUCLEAN) |
| return btrfs_log_dev_root(LOG_ERR, r, arg_target); |
| if (r < 0) |
| return log_error_errno(r, "Failed to determine block device of \"%s\": %m", arg_target); |
| if (devno == 0) |
| return log_error_errno(SYNTHETIC_ERRNO(ENODEV), "File system \"%s\" not backed by block device.", arg_target); |
| |
| r = maybe_resize_underlying_device(mountfd, arg_target, devno); |
| if (r < 0) |
| log_warning_errno(r, "Unable to resize underlying device of \"%s\", proceeding anyway: %m", arg_target); |
| |
| devfd = r = device_open_from_devnum(S_IFBLK, devno, O_RDONLY|O_CLOEXEC, &devpath); |
| if (r < 0) |
| return log_error_errno(r, "Failed to open block device " DEVNUM_FORMAT_STR ": %m", |
| DEVNUM_FORMAT_VAL(devno)); |
| |
| if (ioctl(devfd, BLKGETSIZE64, &size) != 0) |
| return log_error_errno(errno, "Failed to query size of \"%s\": %m", devpath); |
| |
| log_debug("Resizing \"%s\" to %"PRIu64" bytes...", arg_target, size); |
| |
| if (arg_dry_run) |
| return 0; |
| |
| r = resize_fs(mountfd, size, &newsize); |
| if (r < 0) |
| return log_error_errno(r, "Failed to resize \"%s\" to %"PRIu64" bytes: %m", |
| arg_target, size); |
| if (newsize == size) |
| log_info("Successfully resized \"%s\" to %s bytes.", |
| arg_target, |
| FORMAT_BYTES(newsize)); |
| else |
| log_info("Successfully resized \"%s\" to %s bytes (%"PRIu64" bytes lost due to blocksize).", |
| arg_target, |
| FORMAT_BYTES(newsize), |
| size - newsize); |
| return 0; |
| } |
| |
| DEFINE_MAIN_FUNCTION(run); |
