diff options
Diffstat (limited to 'src/shared/extension-release.c')
| -rw-r--r-- | src/shared/extension-release.c | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/src/shared/extension-release.c b/src/shared/extension-release.c new file mode 100644 index 0000000..2da8e7e --- /dev/null +++ b/src/shared/extension-release.c @@ -0,0 +1,137 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ + +#include "alloc-util.h" +#include "architecture.h" +#include "env-util.h" +#include "extension-release.h" +#include "log.h" +#include "os-util.h" +#include "strv.h" + +int extension_release_validate( + const char *name, + const char *host_os_release_id, + const char *host_os_release_version_id, + const char *host_os_release_sysext_level, + const char *host_sysext_scope, + char **extension_release) { + + const char *extension_release_id = NULL, *extension_release_sysext_level = NULL, *extension_architecture = NULL; + + assert(name); + assert(!isempty(host_os_release_id)); + + /* Now that we can look into the extension image, let's see if the OS version is compatible */ + if (strv_isempty(extension_release)) { + log_debug("Extension '%s' carries no extension-release data, ignoring extension.", name); + return 0; + } + + if (host_sysext_scope) { + _cleanup_strv_free_ char **extension_sysext_scope_list = NULL; + const char *extension_sysext_scope; + bool valid; + + extension_sysext_scope = strv_env_pairs_get(extension_release, "SYSEXT_SCOPE"); + if (extension_sysext_scope) { + extension_sysext_scope_list = strv_split(extension_sysext_scope, WHITESPACE); + if (!extension_sysext_scope_list) + return -ENOMEM; + } + + /* by default extension are good for attachment in portable service and on the system */ + valid = strv_contains( + extension_sysext_scope_list ?: STRV_MAKE("system", "portable"), + host_sysext_scope); + if (!valid) { + log_debug("Extension '%s' is not suitable for scope %s, ignoring extension.", name, host_sysext_scope); + return 0; + } + } + + /* When the architecture field is present and not '_any' it must match the host - for now just look at uname but in + * the future we could check if the kernel also supports 32 bit or binfmt has a translator set up for the architecture */ + extension_architecture = strv_env_pairs_get(extension_release, "ARCHITECTURE"); + if (!isempty(extension_architecture) && !streq(extension_architecture, "_any") && + !streq(architecture_to_string(uname_architecture()), extension_architecture)) { + log_debug("Extension '%s' is for architecture '%s', but deployed on top of '%s'.", + name, extension_architecture, architecture_to_string(uname_architecture())); + return 0; + } + + extension_release_id = strv_env_pairs_get(extension_release, "ID"); + if (isempty(extension_release_id)) { + log_debug("Extension '%s' does not contain ID in extension-release but requested to match '%s' or be '_any'", + name, host_os_release_id); + return 0; + } + + /* A sysext with no host OS dependency (static binaries or scripts) can match + * '_any' host OS, and VERSION_ID or SYSEXT_LEVEL are not required anywhere */ + if (streq(extension_release_id, "_any")) { + log_debug("Extension '%s' matches '_any' OS.", name); + return 1; + } + + if (!streq(host_os_release_id, extension_release_id)) { + log_debug("Extension '%s' is for OS '%s', but deployed on top of '%s'.", + name, extension_release_id, host_os_release_id); + return 0; + } + + /* Rolling releases do not typically set VERSION_ID (eg: ArchLinux) */ + if (isempty(host_os_release_version_id) && isempty(host_os_release_sysext_level)) { + log_debug("No version info on the host (rolling release?), but ID in %s matched.", name); + return 1; + } + + /* If the extension has a sysext API level declared, then it must match the host API + * level. Otherwise, compare OS version as a whole */ + extension_release_sysext_level = strv_env_pairs_get(extension_release, "SYSEXT_LEVEL"); + if (!isempty(host_os_release_sysext_level) && !isempty(extension_release_sysext_level)) { + if (!streq_ptr(host_os_release_sysext_level, extension_release_sysext_level)) { + log_debug("Extension '%s' is for sysext API level '%s', but running on sysext API level '%s'", + name, strna(extension_release_sysext_level), strna(host_os_release_sysext_level)); + return 0; + } + } else if (!isempty(host_os_release_version_id)) { + const char *extension_release_version_id; + + extension_release_version_id = strv_env_pairs_get(extension_release, "VERSION_ID"); + if (isempty(extension_release_version_id)) { + log_debug("Extension '%s' does not contain VERSION_ID in extension-release but requested to match '%s'", + name, strna(host_os_release_version_id)); + return 0; + } + + if (!streq_ptr(host_os_release_version_id, extension_release_version_id)) { + log_debug("Extension '%s' is for OS '%s', but deployed on top of '%s'.", + name, strna(extension_release_version_id), strna(host_os_release_version_id)); + return 0; + } + } else if (isempty(host_os_release_version_id) && isempty(host_os_release_sysext_level)) { + /* Rolling releases do not typically set VERSION_ID (eg: ArchLinux) */ + log_debug("No version info on the host (rolling release?), but ID in %s matched.", name); + return 1; + } + + log_debug("Version info of extension '%s' matches host.", name); + return 1; +} + +int parse_env_extension_hierarchies(char ***ret_hierarchies) { + _cleanup_free_ char **l = NULL; + int r; + + r = getenv_path_list("SYSTEMD_SYSEXT_HIERARCHIES", &l); + if (r == -ENXIO) { + /* Default when unset */ + l = strv_new("/usr", "/opt"); + if (!l) + return -ENOMEM; + } else if (r < 0) + return r; + + *ret_hierarchies = TAKE_PTR(l); + return 0; +} |