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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 15:35:18 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 15:35:18 +0000 |
commit | b750101eb236130cf056c675997decbac904cc49 (patch) | |
tree | a5df1a06754bdd014cb975c051c83b01c9a97532 /src/import/import.c | |
parent | Initial commit. (diff) | |
download | systemd-b750101eb236130cf056c675997decbac904cc49.tar.xz systemd-b750101eb236130cf056c675997decbac904cc49.zip |
Adding upstream version 252.22.upstream/252.22upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/import/import.c | 491 |
1 files changed, 491 insertions, 0 deletions
diff --git a/src/import/import.c b/src/import/import.c new file mode 100644 index 0000000..c762124 --- /dev/null +++ b/src/import/import.c @@ -0,0 +1,491 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ + +#include <getopt.h> +#include <locale.h> + +#include "sd-event.h" +#include "sd-id128.h" + +#include "alloc-util.h" +#include "discover-image.h" +#include "env-util.h" +#include "fd-util.h" +#include "fs-util.h" +#include "hostname-util.h" +#include "import-raw.h" +#include "import-tar.h" +#include "import-util.h" +#include "io-util.h" +#include "main-func.h" +#include "parse-argument.h" +#include "parse-util.h" +#include "signal-util.h" +#include "string-util.h" +#include "terminal-util.h" +#include "verbs.h" + +static const char *arg_image_root = "/var/lib/machines"; +static ImportFlags arg_import_flags = IMPORT_BTRFS_SUBVOL | IMPORT_BTRFS_QUOTA | IMPORT_CONVERT_QCOW2 | IMPORT_SYNC; +static uint64_t arg_offset = UINT64_MAX, arg_size_max = UINT64_MAX; + +static int normalize_local(const char *local, char **ret) { + _cleanup_free_ char *ll = NULL; + int r; + + assert(ret); + + if (arg_import_flags & IMPORT_DIRECT) { + + if (!local) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "No local path specified."); + + if (!path_is_absolute(local)) { + ll = path_join(arg_image_root, local); + if (!ll) + return log_oom(); + + local = ll; + } + + if (!path_is_valid(local)) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), + "Local path name '%s' is not valid.", local); + } else { + if (local) { + if (!hostname_is_valid(local, 0)) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), + "Local image name '%s' is not valid.", + local); + } else + local = "imported"; + + if (!FLAGS_SET(arg_import_flags, IMPORT_FORCE)) { + r = image_find(IMAGE_MACHINE, local, NULL, NULL); + if (r < 0) { + if (r != -ENOENT) + return log_error_errno(r, "Failed to check whether image '%s' exists: %m", local); + } else + return log_error_errno(SYNTHETIC_ERRNO(EEXIST), + "Image '%s' already exists.", + local); + } + } + + if (!ll) { + ll = strdup(local); + if (!ll) + return log_oom(); + } + + *ret = TAKE_PTR(ll); + return 0; +} + +static int open_source(const char *path, const char *local, int *ret_open_fd) { + _cleanup_close_ int open_fd = -1; + int retval; + + assert(local); + assert(ret_open_fd); + + if (path) { + open_fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY); + if (open_fd < 0) + return log_error_errno(errno, "Failed to open source file '%s': %m", path); + + retval = open_fd; + + if (arg_offset != UINT64_MAX) + log_info("Importing '%s', saving at offset %" PRIu64 " in '%s'.", path, arg_offset, local); + else + log_info("Importing '%s', saving as '%s'.", path, local); + } else { + _cleanup_free_ char *pretty = NULL; + + retval = STDIN_FILENO; + + (void) fd_get_path(STDIN_FILENO, &pretty); + + if (arg_offset != UINT64_MAX) + log_info("Importing '%s', saving at offset %" PRIu64 " in '%s'.", strempty(pretty), arg_offset, local); + else + log_info("Importing '%s', saving as '%s'.", strempty(pretty), local); + } + + *ret_open_fd = TAKE_FD(open_fd); + return retval; +} + +static void on_tar_finished(TarImport *import, int error, void *userdata) { + sd_event *event = userdata; + assert(import); + + if (error == 0) + log_info("Operation completed successfully."); + + sd_event_exit(event, abs(error)); +} + +static int import_tar(int argc, char *argv[], void *userdata) { + _cleanup_(tar_import_unrefp) TarImport *import = NULL; + _cleanup_free_ char *ll = NULL, *normalized = NULL; + _cleanup_(sd_event_unrefp) sd_event *event = NULL; + const char *path = NULL, *local = NULL; + _cleanup_close_ int open_fd = -1; + int r, fd; + + if (argc >= 2) + path = empty_or_dash_to_null(argv[1]); + + if (argc >= 3) + local = empty_or_dash_to_null(argv[2]); + else if (path) { + _cleanup_free_ char *l = NULL; + + r = path_extract_filename(path, &l); + if (r < 0) + return log_error_errno(r, "Failed to extract filename from path '%s': %m", path); + + r = tar_strip_suffixes(l, &ll); + if (r < 0) + return log_oom(); + + local = ll; + } + + r = normalize_local(local, &normalized); + if (r < 0) + return r; + + fd = open_source(path, normalized, &open_fd); + if (fd < 0) + return r; + + r = import_allocate_event_with_signals(&event); + if (r < 0) + return r; + + if (!FLAGS_SET(arg_import_flags, IMPORT_SYNC)) + log_info("File system synchronization on completion is off."); + + r = tar_import_new(&import, event, arg_image_root, on_tar_finished, event); + if (r < 0) + return log_error_errno(r, "Failed to allocate importer: %m"); + + r = tar_import_start( + import, + fd, + normalized, + arg_import_flags & IMPORT_FLAGS_MASK_TAR); + if (r < 0) + return log_error_errno(r, "Failed to import image: %m"); + + r = sd_event_loop(event); + if (r < 0) + return log_error_errno(r, "Failed to run event loop: %m"); + + log_info("Exiting."); + return -r; +} + +static void on_raw_finished(RawImport *import, int error, void *userdata) { + sd_event *event = userdata; + assert(import); + + if (error == 0) + log_info("Operation completed successfully."); + + sd_event_exit(event, abs(error)); +} + +static int import_raw(int argc, char *argv[], void *userdata) { + _cleanup_(raw_import_unrefp) RawImport *import = NULL; + _cleanup_free_ char *ll = NULL, *normalized = NULL; + _cleanup_(sd_event_unrefp) sd_event *event = NULL; + const char *path = NULL, *local = NULL; + _cleanup_close_ int open_fd = -1; + int r, fd; + + if (argc >= 2) + path = empty_or_dash_to_null(argv[1]); + + if (argc >= 3) + local = empty_or_dash_to_null(argv[2]); + else if (path) { + _cleanup_free_ char *l = NULL; + + r = path_extract_filename(path, &l); + if (r < 0) + return log_error_errno(r, "Failed to extract filename from path '%s': %m", path); + + r = raw_strip_suffixes(l, &ll); + if (r < 0) + return log_oom(); + + local = ll; + } + + r = normalize_local(local, &normalized); + if (r < 0) + return r; + + fd = open_source(path, normalized, &open_fd); + if (fd < 0) + return fd; + + r = import_allocate_event_with_signals(&event); + if (r < 0) + return r; + + if (!FLAGS_SET(arg_import_flags, IMPORT_SYNC)) + log_info("File system synchronization on completion is off."); + + r = raw_import_new(&import, event, arg_image_root, on_raw_finished, event); + if (r < 0) + return log_error_errno(r, "Failed to allocate importer: %m"); + + r = raw_import_start( + import, + fd, + normalized, + arg_offset, + arg_size_max, + arg_import_flags & IMPORT_FLAGS_MASK_RAW); + if (r < 0) + return log_error_errno(r, "Failed to import image: %m"); + + r = sd_event_loop(event); + if (r < 0) + return log_error_errno(r, "Failed to run event loop: %m"); + + log_info("Exiting."); + return -r; +} + +static int help(int argc, char *argv[], void *userdata) { + + printf("%1$s [OPTIONS...] {COMMAND} ...\n" + "\n%4$sImport container or virtual machine images.%5$s\n" + "\n%2$sCommands:%3$s\n" + " tar FILE [NAME] Import a TAR image\n" + " raw FILE [NAME] Import a RAW image\n" + "\n%2$sOptions:%3$s\n" + " -h --help Show this help\n" + " --version Show package version\n" + " --force Force creation of image\n" + " --image-root=PATH Image root directory\n" + " --read-only Create a read-only image\n" + " --direct Import directly to specified file\n" + " --btrfs-subvol=BOOL Controls whether to create a btrfs subvolume\n" + " instead of a directory\n" + " --btrfs-quota=BOOL Controls whether to set up quota for btrfs\n" + " subvolume\n" + " --convert-qcow2=BOOL Controls whether to convert QCOW2 images to\n" + " regular disk images\n" + " --sync=BOOL Controls whether to sync() before completing\n" + " --offset=BYTES Offset to seek to in destination\n" + " --size-max=BYTES Maximum number of bytes to write to destination\n", + program_invocation_short_name, + ansi_underline(), + ansi_normal(), + ansi_highlight(), + ansi_normal()); + + return 0; +} + +static int parse_argv(int argc, char *argv[]) { + + enum { + ARG_VERSION = 0x100, + ARG_FORCE, + ARG_IMAGE_ROOT, + ARG_READ_ONLY, + ARG_DIRECT, + ARG_BTRFS_SUBVOL, + ARG_BTRFS_QUOTA, + ARG_CONVERT_QCOW2, + ARG_SYNC, + ARG_OFFSET, + ARG_SIZE_MAX, + }; + + static const struct option options[] = { + { "help", no_argument, NULL, 'h' }, + { "version", no_argument, NULL, ARG_VERSION }, + { "force", no_argument, NULL, ARG_FORCE }, + { "image-root", required_argument, NULL, ARG_IMAGE_ROOT }, + { "read-only", no_argument, NULL, ARG_READ_ONLY }, + { "direct", no_argument, NULL, ARG_DIRECT }, + { "btrfs-subvol", required_argument, NULL, ARG_BTRFS_SUBVOL }, + { "btrfs-quota", required_argument, NULL, ARG_BTRFS_QUOTA }, + { "convert-qcow2", required_argument, NULL, ARG_CONVERT_QCOW2 }, + { "sync", required_argument, NULL, ARG_SYNC }, + { "offset", required_argument, NULL, ARG_OFFSET }, + { "size-max", required_argument, NULL, ARG_SIZE_MAX }, + {} + }; + + int r, c; + + assert(argc >= 0); + assert(argv); + + while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) + + switch (c) { + + case 'h': + return help(0, NULL, NULL); + + case ARG_VERSION: + return version(); + + case ARG_FORCE: + arg_import_flags |= IMPORT_FORCE; + break; + + case ARG_IMAGE_ROOT: + arg_image_root = optarg; + break; + + case ARG_READ_ONLY: + arg_import_flags |= IMPORT_READ_ONLY; + break; + + case ARG_DIRECT: + arg_import_flags |= IMPORT_DIRECT; + break; + + case ARG_BTRFS_SUBVOL: + r = parse_boolean_argument("--btrfs-subvol=", optarg, NULL); + if (r < 0) + return r; + + SET_FLAG(arg_import_flags, IMPORT_BTRFS_SUBVOL, r); + break; + + case ARG_BTRFS_QUOTA: + r = parse_boolean_argument("--btrfs-quota=", optarg, NULL); + if (r < 0) + return r; + + SET_FLAG(arg_import_flags, IMPORT_BTRFS_QUOTA, r); + break; + + case ARG_CONVERT_QCOW2: + r = parse_boolean_argument("--convert-qcow2=", optarg, NULL); + if (r < 0) + return r; + + SET_FLAG(arg_import_flags, IMPORT_CONVERT_QCOW2, r); + break; + + case ARG_SYNC: + r = parse_boolean_argument("--sync=", optarg, NULL); + if (r < 0) + return r; + + SET_FLAG(arg_import_flags, IMPORT_SYNC, r); + break; + + case ARG_OFFSET: { + uint64_t u; + + r = safe_atou64(optarg, &u); + if (r < 0) + return log_error_errno(r, "Failed to parse --offset= argument: %s", optarg); + if (!FILE_SIZE_VALID(u)) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Argument to --offset= switch too large: %s", optarg); + + arg_offset = u; + break; + } + + case ARG_SIZE_MAX: { + uint64_t u; + + r = parse_size(optarg, 1024, &u); + if (r < 0) + return log_error_errno(r, "Failed to parse --size-max= argument: %s", optarg); + if (!FILE_SIZE_VALID(u)) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Argument to --size-max= switch too large: %s", optarg); + + arg_size_max = u; + break; + } + + case '?': + return -EINVAL; + + default: + assert_not_reached(); + } + + /* Make sure offset+size is still in the valid range if both set */ + if (arg_offset != UINT64_MAX && arg_size_max != UINT64_MAX && + ((arg_size_max > (UINT64_MAX - arg_offset)) || + !FILE_SIZE_VALID(arg_offset + arg_size_max))) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "File offset und maximum size out of range."); + + if (arg_offset != UINT64_MAX && !FLAGS_SET(arg_import_flags, IMPORT_DIRECT)) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "File offset only supported in --direct mode."); + + return 1; +} + +static int import_main(int argc, char *argv[]) { + static const Verb verbs[] = { + { "help", VERB_ANY, VERB_ANY, 0, help }, + { "tar", 2, 3, 0, import_tar }, + { "raw", 2, 3, 0, import_raw }, + {} + }; + + return dispatch_verb(argc, argv, verbs, NULL); +} + +static void parse_env(void) { + int r; + + /* Let's make these relatively low-level settings also controllable via env vars. User can then set + * them to systemd-import if they like to tweak behaviour */ + + r = getenv_bool("SYSTEMD_IMPORT_BTRFS_SUBVOL"); + if (r >= 0) + SET_FLAG(arg_import_flags, IMPORT_BTRFS_SUBVOL, r); + else if (r != -ENXIO) + log_warning_errno(r, "Failed to parse $SYSTEMD_IMPORT_BTRFS_SUBVOL: %m"); + + r = getenv_bool("SYSTEMD_IMPORT_BTRFS_QUOTA"); + if (r >= 0) + SET_FLAG(arg_import_flags, IMPORT_BTRFS_QUOTA, r); + else if (r != -ENXIO) + log_warning_errno(r, "Failed to parse $SYSTEMD_IMPORT_BTRFS_QUOTA: %m"); + + r = getenv_bool("SYSTEMD_IMPORT_SYNC"); + if (r >= 0) + SET_FLAG(arg_import_flags, IMPORT_SYNC, r); + else if (r != -ENXIO) + log_warning_errno(r, "Failed to parse $SYSTEMD_IMPORT_SYNC: %m"); +} + +static int run(int argc, char *argv[]) { + int r; + + setlocale(LC_ALL, ""); + log_parse_environment(); + log_open(); + + parse_env(); + + r = parse_argv(argc, argv); + if (r <= 0) + return r; + + (void) ignore_signals(SIGPIPE); + + return import_main(argc, argv); +} + +DEFINE_MAIN_FUNCTION(run); |