| /* SPDX-License-Identifier: LGPL-2.1-or-later */ |
| |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <sys/stat.h> |
| #include <sys/types.h> |
| |
| #include "alloc-util.h" |
| #include "dropin.h" |
| #include "escape.h" |
| #include "fd-util.h" |
| #include "fileio.h" |
| #include "fstab-util.h" |
| #include "generator.h" |
| #include "hashmap.h" |
| #include "id128-util.h" |
| #include "log.h" |
| #include "mkdir.h" |
| #include "parse-util.h" |
| #include "path-util.h" |
| #include "proc-cmdline.h" |
| #include "specifier.h" |
| #include "string-util.h" |
| #include "strv.h" |
| #include "unit-name.h" |
| #include "util.h" |
| |
| typedef struct crypto_device { |
| char *uuid; |
| char *keyfile; |
| char *keydev; |
| char *headerdev; |
| char *datadev; |
| char *name; |
| char *options; |
| bool create; |
| } crypto_device; |
| |
| static const char *arg_dest = NULL; |
| static bool arg_enabled = true; |
| static bool arg_read_crypttab = true; |
| static const char *arg_crypttab = NULL; |
| static const char *arg_runtime_directory = NULL; |
| static bool arg_allow_list = false; |
| static Hashmap *arg_disks = NULL; |
| static char *arg_default_options = NULL; |
| static char *arg_default_keyfile = NULL; |
| |
| STATIC_DESTRUCTOR_REGISTER(arg_disks, hashmap_freep); |
| STATIC_DESTRUCTOR_REGISTER(arg_default_options, freep); |
| STATIC_DESTRUCTOR_REGISTER(arg_default_keyfile, freep); |
| |
| static int split_locationspec(const char *locationspec, char **ret_file, char **ret_device) { |
| _cleanup_free_ char *file = NULL, *device = NULL; |
| const char *c; |
| |
| assert(ret_file); |
| assert(ret_device); |
| |
| if (!locationspec) { |
| *ret_file = *ret_device = NULL; |
| return 0; |
| } |
| |
| c = strrchr(locationspec, ':'); |
| if (c) { |
| /* The device part has to be either an absolute path to device node (/dev/something, |
| * /dev/foo/something, or even possibly /dev/foo/something:part), or a fstab device |
| * specification starting with LABEL= or similar. The file part has the same syntax. |
| * |
| * Let's try to guess if the second part looks like a device specification, or just part of a |
| * filename with a colon. fstab_node_to_udev_node() will convert the fstab device syntax to |
| * an absolute path. If we didn't get an absolute path, assume that it is just part of the |
| * first file argument. */ |
| |
| device = fstab_node_to_udev_node(c + 1); |
| if (!device) |
| return log_oom(); |
| |
| if (path_is_absolute(device)) |
| file = strndup(locationspec, c-locationspec); |
| else { |
| log_debug("Location specification argument contains a colon, but \"%s\" doesn't look like a device specification.\n" |
| "Assuming that \"%s\" is a single device specification.", |
| c + 1, locationspec); |
| device = mfree(device); |
| c = NULL; |
| } |
| } |
| |
| if (!c) |
| /* No device specified */ |
| file = strdup(locationspec); |
| |
| if (!file) |
| return log_oom(); |
| |
| *ret_file = TAKE_PTR(file); |
| *ret_device = TAKE_PTR(device); |
| |
| return 0; |
| } |
| |
| static int generate_device_mount( |
| const char *name, |
| const char *device, |
| const char *type_prefix, /* "keydev" or "headerdev" */ |
| const char *device_timeout, |
| bool canfail, |
| bool readonly, |
| char **unit, |
| char **mount) { |
| |
| _cleanup_free_ char *u = NULL, *where = NULL, *name_escaped = NULL, *device_unit = NULL; |
| _cleanup_fclose_ FILE *f = NULL; |
| int r; |
| usec_t timeout_us; |
| |
| assert(name); |
| assert(device); |
| assert(unit); |
| assert(mount); |
| |
| r = mkdir_parents(arg_runtime_directory, 0755); |
| if (r < 0) |
| return r; |
| |
| r = mkdir(arg_runtime_directory, 0700); |
| if (r < 0 && errno != EEXIST) |
| return -errno; |
| |
| name_escaped = cescape(name); |
| if (!name_escaped) |
| return -ENOMEM; |
| |
| where = strjoin(arg_runtime_directory, "/", type_prefix, "-", name_escaped); |
| if (!where) |
| return -ENOMEM; |
| |
| r = mkdir(where, 0700); |
| if (r < 0 && errno != EEXIST) |
| return -errno; |
| |
| r = unit_name_from_path(where, ".mount", &u); |
| if (r < 0) |
| return r; |
| |
| r = generator_open_unit_file(arg_dest, NULL, u, &f); |
| if (r < 0) |
| return r; |
| |
| fprintf(f, |
| "[Unit]\n" |
| "DefaultDependencies=no\n\n" |
| "[Mount]\n" |
| "What=%s\n" |
| "Where=%s\n" |
| "Options=%s%s\n", device, where, readonly ? "ro" : "rw", canfail ? ",nofail" : ""); |
| |
| if (device_timeout) { |
| r = parse_sec_fix_0(device_timeout, &timeout_us); |
| if (r >= 0) { |
| r = unit_name_from_path(device, ".device", &device_unit); |
| if (r < 0) |
| return log_error_errno(r, "Failed to generate unit name: %m"); |
| |
| r = write_drop_in_format(arg_dest, device_unit, 90, "device-timeout", |
| "# Automatically generated by systemd-cryptsetup-generator \n\n" |
| "[Unit]\nJobRunningTimeoutSec=%s", device_timeout); |
| if (r < 0) |
| return log_error_errno(r, "Failed to write device drop-in: %m"); |
| |
| } else |
| log_warning_errno(r, "Failed to parse %s, ignoring: %m", device_timeout); |
| |
| } |
| |
| r = fflush_and_check(f); |
| if (r < 0) |
| return r; |
| |
| *unit = TAKE_PTR(u); |
| *mount = TAKE_PTR(where); |
| |
| return 0; |
| } |
| |
| static int generate_device_umount(const char *name, |
| const char *device_mount, |
| const char *type_prefix, /* "keydev" or "headerdev" */ |
| char **ret_umount_unit) { |
| _cleanup_fclose_ FILE *f = NULL; |
| _cleanup_free_ char *u = NULL, *name_escaped = NULL, *mount = NULL; |
| int r; |
| |
| assert(name); |
| assert(ret_umount_unit); |
| |
| name_escaped = cescape(name); |
| if (!name_escaped) |
| return -ENOMEM; |
| |
| u = strjoin(type_prefix, "-", name_escaped, "-umount.service"); |
| if (!u) |
| return -ENOMEM; |
| |
| r = unit_name_from_path(device_mount, ".mount", &mount); |
| if (r < 0) |
| return r; |
| |
| r = generator_open_unit_file(arg_dest, NULL, u, &f); |
| if (r < 0) |
| return r; |
| |
| fprintf(f, |
| "[Unit]\n" |
| "DefaultDependencies=no\n" |
| "After=%s\n\n" |
| "[Service]\n" |
| "ExecStart=-" UMOUNT_PATH " %s\n\n", mount, device_mount); |
| |
| r = fflush_and_check(f); |
| if (r < 0) |
| return r; |
| |
| *ret_umount_unit = TAKE_PTR(u); |
| return 0; |
| } |
| |
| static int print_dependencies(FILE *f, const char* device_path) { |
| int r; |
| |
| if (STR_IN_SET(device_path, "-", "none")) |
| /* None, nothing to do */ |
| return 0; |
| |
| if (PATH_IN_SET(device_path, |
| "/dev/urandom", |
| "/dev/random", |
| "/dev/hw_random", |
| "/dev/hwrng")) { |
| /* RNG device, add random dep */ |
| fputs("After=systemd-random-seed.service\n", f); |
| return 0; |
| } |
| |
| _cleanup_free_ char *udev_node = fstab_node_to_udev_node(device_path); |
| if (!udev_node) |
| return log_oom(); |
| |
| if (path_equal(udev_node, "/dev/null")) |
| return 0; |
| |
| if (path_startswith(udev_node, "/dev/")) { |
| /* We are dealing with a block device, add dependency for corresponding unit */ |
| _cleanup_free_ char *unit = NULL; |
| |
| r = unit_name_from_path(udev_node, ".device", &unit); |
| if (r < 0) |
| return log_error_errno(r, "Failed to generate unit name: %m"); |
| |
| fprintf(f, |
| "After=%1$s\n" |
| "Requires=%1$s\n", unit); |
| } else { |
| /* Regular file, add mount dependency */ |
| _cleanup_free_ char *escaped_path = specifier_escape(device_path); |
| if (!escaped_path) |
| return log_oom(); |
| |
| fprintf(f, "RequiresMountsFor=%s\n", escaped_path); |
| } |
| |
| return 0; |
| } |
| |
| static int create_disk( |
| const char *name, |
| const char *device, |
| const char *password, |
| const char *keydev, |
| const char *headerdev, |
| const char *options, |
| const char *source) { |
| |
| _cleanup_free_ char *n = NULL, *d = NULL, *u = NULL, *e = NULL, |
| *keydev_mount = NULL, *keyfile_timeout_value = NULL, |
| *filtered = NULL, *u_escaped = NULL, *name_escaped = NULL, *header_path = NULL, *password_buffer = NULL, |
| *tmp_fstype = NULL, *filtered_header = NULL, *headerdev_mount = NULL; |
| _cleanup_fclose_ FILE *f = NULL; |
| const char *dmname; |
| bool noauto, nofail, swap, netdev, attach_in_initrd; |
| int r, detached_header, keyfile_can_timeout, tmp; |
| |
| assert(name); |
| assert(device); |
| |
| noauto = fstab_test_yes_no_option(options, "noauto\0" "auto\0"); |
| nofail = fstab_test_yes_no_option(options, "nofail\0" "fail\0"); |
| swap = fstab_test_option(options, "swap\0"); |
| netdev = fstab_test_option(options, "_netdev\0"); |
| attach_in_initrd = fstab_test_option(options, "x-initrd.attach\0"); |
| |
| keyfile_can_timeout = fstab_filter_options(options, |
| "keyfile-timeout\0", |
| NULL, &keyfile_timeout_value, NULL, NULL); |
| if (keyfile_can_timeout < 0) |
| return log_error_errno(keyfile_can_timeout, "Failed to parse keyfile-timeout= option value: %m"); |
| |
| detached_header = fstab_filter_options( |
| options, |
| "header\0", |
| NULL, |
| &header_path, |
| NULL, |
| headerdev ? &filtered_header : NULL); |
| if (detached_header < 0) |
| return log_error_errno(detached_header, "Failed to parse header= option value: %m"); |
| |
| tmp = fstab_filter_options(options, "tmp\0", NULL, &tmp_fstype, NULL, NULL); |
| if (tmp < 0) |
| return log_error_errno(tmp, "Failed to parse tmp= option value: %m"); |
| |
| if (tmp && swap) |
| return log_error_errno(SYNTHETIC_ERRNO(EINVAL), |
| "Device '%s' cannot be both 'tmp' and 'swap'. Ignoring.", |
| name); |
| |
| name_escaped = specifier_escape(name); |
| if (!name_escaped) |
| return log_oom(); |
| |
| e = unit_name_escape(name); |
| if (!e) |
| return log_oom(); |
| |
| u = fstab_node_to_udev_node(device); |
| if (!u) |
| return log_oom(); |
| |
| r = unit_name_build("systemd-cryptsetup", e, ".service", &n); |
| if (r < 0) |
| return log_error_errno(r, "Failed to generate unit name: %m"); |
| |
| u_escaped = specifier_escape(u); |
| if (!u_escaped) |
| return log_oom(); |
| |
| r = unit_name_from_path(u, ".device", &d); |
| if (r < 0) |
| return log_error_errno(r, "Failed to generate unit name: %m"); |
| |
| if (keydev && !password) |
| return log_error_errno(SYNTHETIC_ERRNO(EINVAL), |
| "Key device is specified, but path to the password file is missing."); |
| |
| r = generator_open_unit_file(arg_dest, NULL, n, &f); |
| if (r < 0) |
| return r; |
| |
| r = generator_write_cryptsetup_unit_section(f, source); |
| if (r < 0) |
| return r; |
| |
| if (netdev) |
| fprintf(f, "After=remote-fs-pre.target\n"); |
| |
| /* If initrd takes care of attaching the disk then it should also detach it during shutdown. */ |
| if (!attach_in_initrd) |
| fprintf(f, "Conflicts=umount.target\n"); |
| |
| if (keydev) { |
| _cleanup_free_ char *unit = NULL, *umount_unit = NULL; |
| |
| r = generate_device_mount( |
| name, |
| keydev, |
| "keydev", |
| keyfile_timeout_value, |
| /* canfail = */ keyfile_can_timeout > 0, |
| /* readonly= */ true, |
| &unit, |
| &keydev_mount); |
| if (r < 0) |
| return log_error_errno(r, "Failed to generate keydev mount unit: %m"); |
| |
| r = generate_device_umount(name, keydev_mount, "keydev", &umount_unit); |
| if (r < 0) |
| return log_error_errno(r, "Failed to generate keydev umount unit: %m"); |
| |
| password_buffer = path_join(keydev_mount, password); |
| if (!password_buffer) |
| return log_oom(); |
| |
| password = password_buffer; |
| |
| fprintf(f, "After=%s\n", unit); |
| if (keyfile_can_timeout > 0) |
| fprintf(f, "Wants=%s\n", unit); |
| else |
| fprintf(f, "Requires=%s\n", unit); |
| |
| if (umount_unit) |
| fprintf(f, |
| "Wants=%s\n" |
| "Before=%s\n", |
| umount_unit, |
| umount_unit |
| ); |
| } |
| |
| if (headerdev) { |
| _cleanup_free_ char *unit = NULL, *umount_unit = NULL, *p = NULL; |
| |
| r = generate_device_mount( |
| name, |
| headerdev, |
| "headerdev", |
| NULL, |
| /* canfail= */ false, /* header is always necessary */ |
| /* readonly= */ false, /* LUKS2 recovery requires rw header access */ |
| &unit, |
| &headerdev_mount); |
| if (r < 0) |
| return log_error_errno(r, "Failed to generate header device mount unit: %m"); |
| |
| r = generate_device_umount(name, headerdev_mount, "headerdev", &umount_unit); |
| if (r < 0) |
| return log_error_errno(r, "Failed to generate header device umount unit: %m"); |
| |
| p = path_join(headerdev_mount, header_path); |
| if (!p) |
| return log_oom(); |
| |
| free_and_replace(header_path, p); |
| |
| if (isempty(filtered_header)) |
| p = strjoin("header=", header_path); |
| else |
| p = strjoin(filtered_header, ",header=", header_path); |
| |
| if (!p) |
| return log_oom(); |
| |
| free_and_replace(filtered_header, p); |
| options = filtered_header; |
| |
| fprintf(f, "After=%s\n" |
| "Requires=%s\n", unit, unit); |
| |
| if (umount_unit) |
| fprintf(f, |
| "Wants=%s\n" |
| "Before=%s\n", |
| umount_unit, |
| umount_unit |
| ); |
| } |
| |
| if (!nofail) |
| fprintf(f, |
| "Before=%s\n", |
| netdev ? "remote-cryptsetup.target" : "cryptsetup.target"); |
| |
| if (password && !keydev) { |
| r = print_dependencies(f, password); |
| if (r < 0) |
| return r; |
| } |
| |
| /* Check if a header option was specified */ |
| if (detached_header > 0 && !headerdev) { |
| r = print_dependencies(f, header_path); |
| if (r < 0) |
| return r; |
| } |
| |
| if (path_startswith(u, "/dev/")) |
| fprintf(f, |
| "BindsTo=%s\n" |
| "After=%s\n" |
| "Before=umount.target\n", |
| d, d); |
| else |
| /* For loopback devices, add systemd-tmpfiles-setup-dev.service |
| dependency to ensure that loopback support is available in |
| the kernel (/dev/loop-control needs to exist) */ |
| fprintf(f, |
| "RequiresMountsFor=%s\n" |
| "Requires=systemd-tmpfiles-setup-dev.service\n" |
| "After=systemd-tmpfiles-setup-dev.service\n", |
| u_escaped); |
| |
| r = generator_write_timeouts(arg_dest, device, name, options, &filtered); |
| if (r < 0) |
| log_warning_errno(r, "Failed to write device timeout drop-in: %m"); |
| |
| r = generator_write_cryptsetup_service_section(f, name, u, password, filtered); |
| if (r < 0) |
| return r; |
| |
| if (tmp) { |
| _cleanup_free_ char *tmp_fstype_escaped = NULL; |
| |
| if (tmp_fstype) { |
| tmp_fstype_escaped = specifier_escape(tmp_fstype); |
| if (!tmp_fstype_escaped) |
| return log_oom(); |
| } |
| |
| fprintf(f, |
| "ExecStartPost=" ROOTLIBEXECDIR "/systemd-makefs '%s' '/dev/mapper/%s'\n", |
| tmp_fstype_escaped ?: "ext4", name_escaped); |
| } |
| |
| if (swap) |
| fprintf(f, |
| "ExecStartPost=" ROOTLIBEXECDIR "/systemd-makefs swap '/dev/mapper/%s'\n", |
| name_escaped); |
| |
| r = fflush_and_check(f); |
| if (r < 0) |
| return log_error_errno(r, "Failed to write unit file %s: %m", n); |
| |
| if (!noauto) { |
| r = generator_add_symlink(arg_dest, |
| netdev ? "remote-cryptsetup.target" : "cryptsetup.target", |
| nofail ? "wants" : "requires", n); |
| if (r < 0) |
| return r; |
| } |
| |
| dmname = strjoina("dev-mapper-", e, ".device"); |
| r = generator_add_symlink(arg_dest, dmname, "requires", n); |
| if (r < 0) |
| return r; |
| |
| if (!noauto && !nofail) { |
| r = write_drop_in(arg_dest, dmname, 40, "device-timeout", |
| "# Automatically generated by systemd-cryptsetup-generator\n\n" |
| "[Unit]\nJobTimeoutSec=0"); |
| if (r < 0) |
| log_warning_errno(r, "Failed to write device timeout drop-in: %m"); |
| } |
| |
| return 0; |
| } |
| |
| static crypto_device* crypt_device_free(crypto_device *d) { |
| if (!d) |
| return NULL; |
| |
| free(d->uuid); |
| free(d->keyfile); |
| free(d->keydev); |
| free(d->name); |
| free(d->options); |
| return mfree(d); |
| } |
| |
| static crypto_device *get_crypto_device(const char *uuid) { |
| int r; |
| crypto_device *d; |
| |
| assert(uuid); |
| |
| d = hashmap_get(arg_disks, uuid); |
| if (!d) { |
| d = new0(struct crypto_device, 1); |
| if (!d) |
| return NULL; |
| |
| d->uuid = strdup(uuid); |
| if (!d->uuid) |
| return mfree(d); |
| |
| r = hashmap_put(arg_disks, d->uuid, d); |
| if (r < 0) { |
| free(d->uuid); |
| return mfree(d); |
| } |
| } |
| |
| return d; |
| } |
| |
| static bool warn_uuid_invalid(const char *uuid, const char *key) { |
| assert(key); |
| |
| if (!id128_is_valid(uuid)) { |
| log_warning("Failed to parse %s= kernel command line switch. UUID is invalid, ignoring.", key); |
| return true; |
| } |
| |
| return false; |
| } |
| |
| static int filter_header_device(const char *options, |
| char **ret_headerdev, |
| char **ret_filtered_headerdev_options) { |
| int r; |
| _cleanup_free_ char *headerfile = NULL, *headerdev = NULL, *headerspec = NULL, |
| *filtered_headerdev = NULL, *filtered_headerspec = NULL; |
| |
| assert(ret_headerdev); |
| assert(ret_filtered_headerdev_options); |
| |
| r = fstab_filter_options(options, "header\0", NULL, &headerspec, NULL, &filtered_headerspec); |
| if (r < 0) |
| return log_error_errno(r, "Failed to parse header= option value: %m"); |
| |
| if (r > 0) { |
| r = split_locationspec(headerspec, &headerfile, &headerdev); |
| if (r < 0) |
| return r; |
| |
| if (isempty(filtered_headerspec)) |
| filtered_headerdev = strjoin("header=", headerfile); |
| else |
| filtered_headerdev = strjoin(filtered_headerspec, ",header=", headerfile); |
| |
| if (!filtered_headerdev) |
| return log_oom(); |
| } else |
| filtered_headerdev = TAKE_PTR(filtered_headerspec); |
| |
| *ret_filtered_headerdev_options = TAKE_PTR(filtered_headerdev); |
| *ret_headerdev = TAKE_PTR(headerdev); |
| |
| return 0; |
| } |
| |
| static int parse_proc_cmdline_item(const char *key, const char *value, void *data) { |
| _cleanup_free_ char *uuid = NULL, *uuid_value = NULL; |
| crypto_device *d; |
| int r; |
| |
| if (streq(key, "luks")) { |
| |
| r = value ? parse_boolean(value) : 1; |
| if (r < 0) |
| log_warning("Failed to parse luks= kernel command line switch %s. Ignoring.", value); |
| else |
| arg_enabled = r; |
| |
| } else if (streq(key, "luks.crypttab")) { |
| |
| r = value ? parse_boolean(value) : 1; |
| if (r < 0) |
| log_warning("Failed to parse luks.crypttab= kernel command line switch %s. Ignoring.", value); |
| else |
| arg_read_crypttab = r; |
| |
| } else if (streq(key, "luks.uuid")) { |
| |
| if (proc_cmdline_value_missing(key, value)) |
| return 0; |
| |
| d = get_crypto_device(startswith(value, "luks-") ?: value); |
| if (!d) |
| return log_oom(); |
| |
| d->create = arg_allow_list = true; |
| |
| } else if (streq(key, "luks.options")) { |
| _cleanup_free_ char *headerdev = NULL, *filtered_headerdev_options = NULL; |
| |
| if (proc_cmdline_value_missing(key, value)) |
| return 0; |
| |
| r = sscanf(value, "%m[0-9a-fA-F-]=%ms", &uuid, &uuid_value); |
| if (r != 2) |
| return free_and_strdup_warn(&arg_default_options, value); |
| |
| if (warn_uuid_invalid(uuid, key)) |
| return 0; |
| |
| d = get_crypto_device(uuid); |
| if (!d) |
| return log_oom(); |
| |
| r = filter_header_device(uuid_value, &headerdev, &filtered_headerdev_options); |
| if (r < 0) |
| return r; |
| |
| free_and_replace(d->options, filtered_headerdev_options); |
| free_and_replace(d->headerdev, headerdev); |
| } else if (streq(key, "luks.key")) { |
| size_t n; |
| _cleanup_free_ char *keyfile = NULL, *keydev = NULL; |
| const char *keyspec; |
| |
| if (proc_cmdline_value_missing(key, value)) |
| return 0; |
| |
| n = strspn(value, ALPHANUMERICAL "-"); |
| if (value[n] != '=') |
| return free_and_strdup_warn(&arg_default_keyfile, value); |
| |
| uuid = strndup(value, n); |
| if (!uuid) |
| return log_oom(); |
| |
| if (warn_uuid_invalid(uuid, key)) |
| return 0; |
| |
| d = get_crypto_device(uuid); |
| if (!d) |
| return log_oom(); |
| |
| keyspec = value + n + 1; |
| r = split_locationspec(keyspec, &keyfile, &keydev); |
| if (r < 0) |
| return r; |
| |
| free_and_replace(d->keyfile, keyfile); |
| free_and_replace(d->keydev, keydev); |
| } else if (streq(key, "luks.data")) { |
| size_t n; |
| _cleanup_free_ char *datadev = NULL; |
| |
| if (proc_cmdline_value_missing(key, value)) |
| return 0; |
| |
| n = strspn(value, ALPHANUMERICAL "-"); |
| if (value[n] != '=') { |
| log_warning("Failed to parse luks.data= kernel command line switch. UUID is invalid, ignoring."); |
| return 0; |
| } |
| |
| uuid = strndup(value, n); |
| if (!uuid) |
| return log_oom(); |
| |
| if (warn_uuid_invalid(uuid, key)) |
| return 0; |
| |
| d = get_crypto_device(uuid); |
| if (!d) |
| return log_oom(); |
| |
| datadev = fstab_node_to_udev_node(value + n + 1); |
| if (!datadev) |
| return log_oom(); |
| |
| free_and_replace(d->datadev, datadev); |
| } else if (streq(key, "luks.name")) { |
| |
| if (proc_cmdline_value_missing(key, value)) |
| return 0; |
| |
| r = sscanf(value, "%m[0-9a-fA-F-]=%ms", &uuid, &uuid_value); |
| if (r == 2) { |
| d = get_crypto_device(uuid); |
| if (!d) |
| return log_oom(); |
| |
| d->create = arg_allow_list = true; |
| |
| free_and_replace(d->name, uuid_value); |
| } else |
| log_warning("Failed to parse luks name switch %s. Ignoring.", value); |
| } |
| |
| return 0; |
| } |
| |
| static int add_crypttab_devices(void) { |
| _cleanup_fclose_ FILE *f = NULL; |
| unsigned crypttab_line = 0; |
| int r; |
| |
| if (!arg_read_crypttab) |
| return 0; |
| |
| r = fopen_unlocked(arg_crypttab, "re", &f); |
| if (r < 0) { |
| if (errno != ENOENT) |
| log_error_errno(errno, "Failed to open %s: %m", arg_crypttab); |
| return 0; |
| } |
| |
| for (;;) { |
| _cleanup_free_ char *line = NULL, *name = NULL, *device = NULL, *keyspec = NULL, *options = NULL, |
| *keyfile = NULL, *keydev = NULL, *headerdev = NULL, *filtered_header = NULL; |
| crypto_device *d = NULL; |
| char *l, *uuid; |
| int k; |
| |
| r = read_line(f, LONG_LINE_MAX, &line); |
| if (r < 0) |
| return log_error_errno(r, "Failed to read %s: %m", arg_crypttab); |
| if (r == 0) |
| break; |
| |
| crypttab_line++; |
| |
| l = strstrip(line); |
| if (IN_SET(l[0], 0, '#')) |
| continue; |
| |
| k = sscanf(l, "%ms %ms %ms %ms", &name, &device, &keyspec, &options); |
| if (k < 2 || k > 4) { |
| log_error("Failed to parse %s:%u, ignoring.", arg_crypttab, crypttab_line); |
| continue; |
| } |
| |
| uuid = startswith(device, "UUID="); |
| if (!uuid) |
| uuid = path_startswith(device, "/dev/disk/by-uuid/"); |
| if (!uuid) |
| uuid = startswith(name, "luks-"); |
| if (uuid) |
| d = hashmap_get(arg_disks, uuid); |
| |
| if (arg_allow_list && !d) { |
| log_info("Not creating device '%s' because it was not specified on the kernel command line.", name); |
| continue; |
| } |
| |
| r = split_locationspec(keyspec, &keyfile, &keydev); |
| if (r < 0) |
| return r; |
| |
| if (options && (!d || !d->options)) { |
| r = filter_header_device(options, &headerdev, &filtered_header); |
| if (r < 0) |
| return r; |
| free_and_replace(options, filtered_header); |
| } |
| |
| r = create_disk(name, |
| device, |
| keyfile, |
| keydev, |
| (d && d->options) ? d->headerdev : headerdev, |
| (d && d->options) ? d->options : options, |
| arg_crypttab); |
| if (r < 0) |
| return r; |
| |
| if (d) |
| d->create = false; |
| } |
| |
| return 0; |
| } |
| |
| static int add_proc_cmdline_devices(void) { |
| int r; |
| crypto_device *d; |
| |
| HASHMAP_FOREACH(d, arg_disks) { |
| _cleanup_free_ char *device = NULL; |
| |
| if (!d->create) |
| continue; |
| |
| if (!d->name) { |
| d->name = strjoin("luks-", d->uuid); |
| if (!d->name) |
| return log_oom(); |
| } |
| |
| device = strjoin("UUID=", d->uuid); |
| if (!device) |
| return log_oom(); |
| |
| r = create_disk(d->name, |
| d->datadev ?: device, |
| d->keyfile ?: arg_default_keyfile, |
| d->keydev, |
| d->headerdev, |
| d->options ?: arg_default_options, |
| "/proc/cmdline"); |
| if (r < 0) |
| return r; |
| } |
| |
| return 0; |
| } |
| |
| DEFINE_PRIVATE_HASH_OPS_WITH_VALUE_DESTRUCTOR(crypt_device_hash_ops, char, string_hash_func, string_compare_func, |
| crypto_device, crypt_device_free); |
| |
| static int run(const char *dest, const char *dest_early, const char *dest_late) { |
| int r; |
| |
| assert_se(arg_dest = dest); |
| |
| arg_crypttab = getenv("SYSTEMD_CRYPTTAB") ?: "/etc/crypttab"; |
| arg_runtime_directory = getenv("RUNTIME_DIRECTORY") ?: "/run/systemd/cryptsetup"; |
| |
| arg_disks = hashmap_new(&crypt_device_hash_ops); |
| if (!arg_disks) |
| return log_oom(); |
| |
| r = proc_cmdline_parse(parse_proc_cmdline_item, NULL, PROC_CMDLINE_STRIP_RD_PREFIX); |
| if (r < 0) |
| return log_warning_errno(r, "Failed to parse kernel command line: %m"); |
| |
| if (!arg_enabled) |
| return 0; |
| |
| r = add_crypttab_devices(); |
| if (r < 0) |
| return r; |
| |
| r = add_proc_cmdline_devices(); |
| if (r < 0) |
| return r; |
| |
| return 0; |
| } |
| |
| DEFINE_MAIN_GENERATOR_FUNCTION(run); |
