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dlopen-note: move all dlopen notes to dlopen-note.h

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This also switches all these notes to be defined via SD_ELF_NOTE_DLOPEN_ANCHORED().
Consequently, any notes added within unreachable or unused functions will be
automatically garbage-collected by the linker (--gc-sections) instead of
bloating the final binary.

E.g. unused p11-kit library dependency is now dropped from
systemd-repart.standalone binary.

Before:
```
$ systemd-analyze dlopen-metadata build/systemd-repart.standalone
FEATURE    DESCRIPTION                                                SONAME                        PRIORITY
cryptsetup Support for disk encryption, integrity, and authentication libcryptsetup.so.12           recommended
blkid      Support for block device identification                    libblkid.so.1                 required
libcrypto  Support for cryptographic operations                       libcrypto.so.4 libcrypto.so.3 recommended
mount      Support for mount enumeration                              libmount.so.1                 required
fdisk      Support for reading and writing partition tables           libfdisk.so.1                 required
blkid      Support for block device identification                    libblkid.so.1                 recommended
libcrypto  Support for cryptographic operations                       libcrypto.so.4 libcrypto.so.3 suggested
cryptsetup Support for disk encryption, integrity, and authentication libcryptsetup.so.12           suggested
fdisk      Support for reading and writing partition tables           libfdisk.so.1                 suggested
idn        Support for internationalized domain names                 libidn2.so.0                  suggested
mount      Support for mount enumeration                              libmount.so.1                 recommended
selinux    Support for SELinux                                        libselinux.so.1               recommended
tpm        Support for TPM                                            libtss2-esys.so.0             suggested
tpm        Support for TPM                                            libtss2-rc.so.0               suggested
tpm        Support for TPM                                            libtss2-mu.so.0               suggested
tpm        Support for TPM                                            libtss2-tcti-device.so.0      suggested
p11-kit    Support for PKCS11 hardware tokens                         libp11-kit.so.0               suggested
```

After:
```
$ systemd-analyze dlopen-metadata build/systemd-repart.standalone
FEATURE    DESCRIPTION                                                SONAME                        PRIORITY
cryptsetup Support for disk encryption, integrity, and authentication libcryptsetup.so.12           recommended
blkid      Support for block device identification                    libblkid.so.1                 required
libcrypto  Support for cryptographic operations                       libcrypto.so.4 libcrypto.so.3 recommended
mount      Support for mount enumeration                              libmount.so.1                 required
fdisk      Support for reading and writing partition tables           libfdisk.so.1                 required
blkid      Support for block device identification                    libblkid.so.1                 recommended
libcrypto  Support for cryptographic operations                       libcrypto.so.4 libcrypto.so.3 suggested
cryptsetup Support for disk encryption, integrity, and authentication libcryptsetup.so.12           suggested
fdisk      Support for reading and writing partition tables           libfdisk.so.1                 suggested
mount      Support for mount enumeration                              libmount.so.1                 recommended
selinux    Support for SELinux                                        libselinux.so.1               recommended
tpm        Support for TPM                                            libtss2-esys.so.0             suggested
tpm        Support for TPM                                            libtss2-rc.so.0               suggested
tpm        Support for TPM                                            libtss2-mu.so.0               suggested
tpm        Support for TPM                                            libtss2-tcti-device.so.0      suggested
```
This commit is contained in:
Yu Watanabe
2026-07-10 16:34:26 +09:00
parent aa0db003cf
commit a74b3e1778
114 changed files with 772 additions and 575 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/shared/seccomp-util.h
+7 -14
View File
@@ -1,8 +1,7 @@
/* SPDX-License-Identifier: LGPL-2.1-or-later */
#pragma once
#include "sd-dlopen.h"
#include "dlopen-note.h"
#include "errno-util.h"
#include "shared-forward.h"
@@ -161,17 +160,6 @@ int parse_syscall_and_errno(const char *in, char **name, int *error);
int seccomp_suppress_sync(void);
#define LIBSECCOMP_NOTE(priority) \
SD_ELF_NOTE_DLOPEN("seccomp", \
"Support for Seccomp Sandboxes", \
priority, \
"libseccomp.so.2")
#define DLOPEN_LIBSECCOMP(log_level, priority) \
({ \
LIBSECCOMP_NOTE(priority); \
dlopen_libseccomp(log_level); \
})
#else
static inline bool is_seccomp_available(void) {
@@ -179,11 +167,16 @@ static inline bool is_seccomp_available(void) {
}
#define DLOPEN_LIBSECCOMP(log_level, priority) dlopen_libseccomp(log_level)
#endif
int dlopen_libseccomp(int log_level);
#define DLOPEN_LIBSECCOMP(log_level, priority) \
({ \
LIBSECCOMP_NOTE(priority); \
dlopen_libseccomp(log_level); \
})
/* This is a special value to be used where syscall filters otherwise expect errno numbers, will be
replaced with real seccomp action. */
enum {