Adding upstream version 255.4.upstream/255.4

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 277 insertions, 0 deletions

diff --git a/src/partition/growfs.c b/src/partition/growfs.c
new file mode 100644
index 0000000..62f3ee6
--- /dev/null
+++ b/src/partition/growfs.c
@@ -0,0 +1,277 @@
+/* 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);