| /* SPDX-License-Identifier: LGPL-2.1+ */ |
| |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <getopt.h> |
| #include <linux/magic.h> |
| #include <sys/ioctl.h> |
| #include <sys/mount.h> |
| #include <sys/stat.h> |
| #include <sys/types.h> |
| #include <sys/vfs.h> |
| |
| #include "blockdev-util.h" |
| #include "crypt-util.h" |
| #include "device-nodes.h" |
| #include "dissect-image.h" |
| #include "escape.h" |
| #include "fd-util.h" |
| #include "format-util.h" |
| #include "log.h" |
| #include "missing.h" |
| #include "mountpoint-util.h" |
| #include "parse-util.h" |
| #include "path-util.h" |
| #include "pretty-print.h" |
| #include "stat-util.h" |
| #include "strv.h" |
| #include "util.h" |
| |
| static const char *arg_target = NULL; |
| static bool arg_dry_run = false; |
| |
| static int resize_ext4(const char *path, int mountfd, int devfd, uint64_t numblocks, uint64_t blocksize) { |
| assert((uint64_t) (int) blocksize == blocksize); |
| |
| if (arg_dry_run) |
| return 0; |
| |
| if (ioctl(mountfd, EXT4_IOC_RESIZE_FS, &numblocks) != 0) |
| return log_error_errno(errno, "Failed to resize \"%s\" to %"PRIu64" blocks (ext4): %m", |
| path, numblocks); |
| |
| return 0; |
| } |
| |
| static int resize_btrfs(const char *path, int mountfd, int devfd, uint64_t numblocks, uint64_t blocksize) { |
| struct btrfs_ioctl_vol_args args = {}; |
| int r; |
| |
| assert((uint64_t) (int) blocksize == blocksize); |
| |
| /* https://bugzilla.kernel.org/show_bug.cgi?id=118111 */ |
| if (numblocks * blocksize < 256*1024*1024) { |
| log_warning("%s: resizing of btrfs volumes smaller than 256M is not supported", path); |
| return -EOPNOTSUPP; |
| } |
| |
| r = snprintf(args.name, sizeof(args.name), "%"PRIu64, numblocks * blocksize); |
| /* The buffer is large enough for any number to fit... */ |
| assert((size_t) r < sizeof(args.name)); |
| |
| if (arg_dry_run) |
| return 0; |
| |
| if (ioctl(mountfd, BTRFS_IOC_RESIZE, &args) != 0) |
| return log_error_errno(errno, "Failed to resize \"%s\" to %"PRIu64" blocks (btrfs): %m", |
| path, numblocks); |
| |
| return 0; |
| } |
| |
| #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_(crypt_freep) struct crypt_device *cd = NULL; |
| _cleanup_close_ int main_devfd = -1; |
| uint64_t size; |
| int r; |
| |
| r = device_path_make_major_minor(S_IFBLK, main_devno, &main_devpath); |
| if (r < 0) |
| return log_error_errno(r, "Failed to format device major/minor path: %m"); |
| |
| main_devfd = open(main_devpath, O_RDONLY|O_CLOEXEC); |
| if (main_devfd < 0) |
| return log_error_errno(errno, "Failed to open \"%s\": %m", main_devpath); |
| |
| 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 = device_path_make_major_minor(S_IFBLK, devno, &devpath); |
| if (r < 0) |
| return log_error_errno(r, "Failed to format major/minor path: %m"); |
| |
| r = crypt_init(&cd, devpath); |
| if (r < 0) |
| return log_error_errno(r, "crypt_init(\"%s\") failed: %m", devpath); |
| |
| crypt_set_log_callback(cd, cryptsetup_log_glue, NULL); |
| |
| r = 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 = 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_slave_device(const char *mountpath, dev_t main_devno) { |
| _cleanup_free_ char *fstype = NULL, *devpath = NULL; |
| dev_t devno; |
| int r; |
| |
| #if HAVE_LIBCRYPTSETUP |
| crypt_set_log_callback(NULL, cryptsetup_log_glue, NULL); |
| crypt_set_debug_level(1); |
| #endif |
| |
| r = get_block_device_harder(mountpath, &devno); |
| if (r < 0) |
| return log_error_errno(r, "Failed to determine underlying block device of \"%s\": %m", |
| mountpath); |
| |
| log_debug("Underlying device %d:%d, main dev %d:%d, %s", |
| major(devno), minor(devno), |
| major(main_devno), minor(main_devno), |
| devno == main_devno ? "same" : "different"); |
| if (devno == main_devno) |
| return 0; |
| |
| r = device_path_make_major_minor(S_IFBLK, devno, &devpath); |
| if (r < 0) |
| return log_error_errno(r, "Failed to format device major/minor path: %m"); |
| |
| 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("Unhandled option"); |
| } |
| |
| 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; |
| } |
| |
| int main(int argc, char *argv[]) { |
| _cleanup_close_ int mountfd = -1, devfd = -1; |
| _cleanup_free_ char *devpath = NULL; |
| uint64_t size, numblocks; |
| char fb[FORMAT_BYTES_MAX]; |
| struct statfs sfs; |
| dev_t devno; |
| int blocksize; |
| int r; |
| |
| log_setup_service(); |
| |
| r = parse_argv(argc, argv); |
| if (r < 0) |
| return EXIT_FAILURE; |
| if (r == 0) |
| return EXIT_SUCCESS; |
| |
| r = path_is_mount_point(arg_target, NULL, 0); |
| if (r < 0) { |
| log_error_errno(r, "Failed to check if \"%s\" is a mount point: %m", arg_target); |
| return EXIT_FAILURE; |
| } |
| if (r == 0) { |
| log_error_errno(r, "\"%s\" is not a mount point: %m", arg_target); |
| return EXIT_FAILURE; |
| } |
| |
| r = get_block_device(arg_target, &devno); |
| if (r < 0) { |
| log_error_errno(r, "Failed to determine block device of \"%s\": %m", arg_target); |
| return EXIT_FAILURE; |
| } |
| |
| r = maybe_resize_slave_device(arg_target, devno); |
| if (r < 0) |
| return EXIT_FAILURE; |
| |
| mountfd = open(arg_target, O_RDONLY|O_CLOEXEC); |
| if (mountfd < 0) { |
| log_error_errno(errno, "Failed to open \"%s\": %m", arg_target); |
| return EXIT_FAILURE; |
| } |
| |
| r = device_path_make_major_minor(S_IFBLK, devno, &devpath); |
| if (r < 0) { |
| log_error_errno(r, "Failed to format device major/minor path: %m"); |
| return EXIT_FAILURE; |
| } |
| |
| devfd = open(devpath, O_RDONLY|O_CLOEXEC); |
| if (devfd < 0) { |
| log_error_errno(errno, "Failed to open \"%s\": %m", devpath); |
| return EXIT_FAILURE; |
| } |
| |
| if (ioctl(devfd, BLKBSZGET, &blocksize) != 0) { |
| log_error_errno(errno, "Failed to query block size of \"%s\": %m", devpath); |
| return EXIT_FAILURE; |
| } |
| |
| if (ioctl(devfd, BLKGETSIZE64, &size) != 0) { |
| log_error_errno(errno, "Failed to query size of \"%s\": %m", devpath); |
| return EXIT_FAILURE; |
| } |
| |
| if (size % blocksize != 0) |
| log_notice("Partition size %"PRIu64" is not a multiple of the blocksize %d," |
| " ignoring %"PRIu64" bytes", size, blocksize, size % blocksize); |
| |
| numblocks = size / blocksize; |
| |
| if (fstatfs(mountfd, &sfs) < 0) { |
| log_error_errno(errno, "Failed to stat file system \"%s\": %m", arg_target); |
| return EXIT_FAILURE; |
| } |
| |
| switch(sfs.f_type) { |
| case EXT4_SUPER_MAGIC: |
| r = resize_ext4(arg_target, mountfd, devfd, numblocks, blocksize); |
| break; |
| case BTRFS_SUPER_MAGIC: |
| r = resize_btrfs(arg_target, mountfd, devfd, numblocks, blocksize); |
| break; |
| default: |
| log_error("Don't know how to resize fs %llx on \"%s\"", |
| (long long unsigned) sfs.f_type, arg_target); |
| return EXIT_FAILURE; |
| } |
| |
| if (r < 0) |
| return EXIT_FAILURE; |
| |
| log_info("Successfully resized \"%s\" to %s bytes (%"PRIu64" blocks of %d bytes).", |
| arg_target, format_bytes(fb, sizeof fb, size), numblocks, blocksize); |
| return EXIT_SUCCESS; |
| } |