X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=src%2Fcryptsetup%2Fcryptsetup-generator.c;h=c6bc65aecfa73dd6a8aa9335fbd0a51e299eaf89;hb=dfcc5c33f42554a5293e68e7093da2403e363997;hp=3961d5d965425fc6d9233efd58a9b5c8e17bac68;hpb=d2e54fae5ca7a0f71b5ac8b356a589ff0a09ea0a;p=elogind.git diff --git a/src/cryptsetup/cryptsetup-generator.c b/src/cryptsetup/cryptsetup-generator.c index 3961d5d96..c6bc65aec 100644 --- a/src/cryptsetup/cryptsetup-generator.c +++ b/src/cryptsetup/cryptsetup-generator.c @@ -27,8 +27,13 @@ #include "util.h" #include "unit-name.h" #include "mkdir.h" +#include "virt.h" +#include "strv.h" -const char *arg_dest = "/tmp"; +static const char *arg_dest = "/tmp"; +static bool arg_enabled = true; +static bool arg_read_crypttab = true; +static char **arg_proc_cmdline_disks = NULL; static bool has_option(const char *haystack, const char *needle) { const char *f = haystack; @@ -76,14 +81,14 @@ static int create_disk( noauto = has_option(options, "noauto"); nofail = has_option(options, "nofail"); - n = unit_name_build_escape("cryptsetup", name, ".service"); + n = unit_name_from_path_instance("systemd-cryptsetup", name, ".service"); if (!n) { r = -ENOMEM; log_error("Failed to allocate unit name."); goto fail; } - p = join(arg_dest, "/", n, NULL); + p = strjoin(arg_dest, "/", n, NULL); if (!p) { r = -ENOMEM; log_error("Failed to allocate unit file name."); @@ -115,10 +120,11 @@ static int create_disk( "# Automatically generated by systemd-cryptsetup-generator\n\n" "[Unit]\n" "Description=Cryptography Setup for %%I\n" + "Documentation=man:systemd-cryptsetup@.service(8) man:crypttab(5)\n" "SourcePath=/etc/crypttab\n" "Conflicts=umount.target\n" "DefaultDependencies=no\n" - "BindTo=%s dev-mapper-%%i.device\n" + "BindsTo=%s dev-mapper-%%i.device\n" "After=systemd-readahead-collect.service systemd-readahead-replay.service %s\n" "Before=umount.target\n", d, d); @@ -169,7 +175,7 @@ static int create_disk( if (!noauto) { - to = join(arg_dest, "/", d, ".wants/", n, NULL); + to = strjoin(arg_dest, "/", d, ".wants/", n, NULL); if (!to) { r = -ENOMEM; goto fail; @@ -185,9 +191,9 @@ static int create_disk( free(to); if (!nofail) - to = join(arg_dest, "/cryptsetup.target.requires/", n, NULL); + to = strjoin(arg_dest, "/cryptsetup.target.requires/", n, NULL); else - to = join(arg_dest, "/cryptsetup.target.wants/", n, NULL); + to = strjoin(arg_dest, "/cryptsetup.target.wants/", n, NULL); if (!to) { r = -ENOMEM; goto fail; @@ -205,7 +211,7 @@ static int create_disk( } e = unit_name_escape(name); - to = join(arg_dest, "/dev-mapper-", e, ".device.requires/", n, NULL); + to = strjoin(arg_dest, "/dev-mapper-", e, ".device.requires/", n, NULL); if (!to) { r = -ENOMEM; goto fail; @@ -235,10 +241,109 @@ fail: return r; } +static int parse_proc_cmdline(void) { + char *line, *w, *state; + int r; + size_t l; + + if (detect_container(NULL) > 0) + return 0; + + r = read_one_line_file("/proc/cmdline", &line); + if (r < 0) { + log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r)); + return 0; + } + + FOREACH_WORD_QUOTED(w, l, line, state) { + char *word; + + word = strndup(w, l); + if (!word) { + r = -ENOMEM; + goto finish; + } + + if (startswith(word, "luks=")) { + r = parse_boolean(word + 5); + if (r < 0) + log_warning("Failed to parse luks switch %s. Ignoring.", word + 5); + else + arg_enabled = r; + + } else if (startswith(word, "rd.luks=")) { + + if (in_initrd()) { + r = parse_boolean(word + 8); + if (r < 0) + log_warning("Failed to parse luks switch %s. Ignoring.", word + 8); + else + arg_enabled = r; + } + + } else if (startswith(word, "luks.crypttab=")) { + r = parse_boolean(word + 14); + if (r < 0) + log_warning("Failed to parse luks crypttab switch %s. Ignoring.", word + 14); + else + arg_read_crypttab = r; + + } else if (startswith(word, "rd.luks.crypttab=")) { + + if (in_initrd()) { + r = parse_boolean(word + 17); + if (r < 0) + log_warning("Failed to parse luks crypttab switch %s. Ignoring.", word + 17); + else + arg_read_crypttab = r; + } + + } else if (startswith(word, "luks.uuid=")) { + char **t; + + t = strv_append(arg_proc_cmdline_disks, word + 10); + if (!t) { + r = log_oom(); + goto finish; + } + strv_free(arg_proc_cmdline_disks); + arg_proc_cmdline_disks = t; + + } else if (startswith(word, "rd.luks.uuid=")) { + + if (in_initrd()) { + char **t; + + t = strv_append(arg_proc_cmdline_disks, word + 13); + if (!t) { + r = log_oom(); + goto finish; + } + strv_free(arg_proc_cmdline_disks); + arg_proc_cmdline_disks = t; + } + + } else if (startswith(word, "luks.") || + (in_initrd() && startswith(word, "rd.luks."))) { + + log_warning("Unknown kernel switch %s. Ignoring.", word); + } + + free(word); + } + + r = 0; + +finish: + free(line); + return r; +} + int main(int argc, char *argv[]) { - FILE *f; + FILE *f = NULL; int r = EXIT_SUCCESS; unsigned n = 0; + char **i; if (argc > 1 && argc != 4) { log_error("This program takes three or no arguments."); @@ -254,6 +359,42 @@ int main(int argc, char *argv[]) { umask(0022); + if (parse_proc_cmdline() < 0) + return EXIT_FAILURE; + + if (!arg_enabled) { + r = EXIT_SUCCESS; + goto finish; + } + + STRV_FOREACH(i, arg_proc_cmdline_disks) { + char *name, *device; + const char *p = *i; + + if (startswith(p, "luks-")) + p += 5; + + name = strappend("luks-", *i); + device = strappend("UUID=", *i); + + if (!name || !device) { + log_oom(); + r = EXIT_FAILURE; + free(name); + free(device); + goto finish; + } + + if (create_disk(name, device, NULL, NULL) < 0) + r = EXIT_FAILURE; + + free(name); + free(device); + } + + if (!arg_read_crypttab) + return r; + f = fopen("/etc/crypttab", "re"); if (!f) { @@ -299,5 +440,10 @@ int main(int argc, char *argv[]) { } finish: + if (f) + fclose(f); + + strv_free(arg_proc_cmdline_disks); + return r; }