From: Andrii Nakryiko <andrii@kernel.org>
To: bpf@vger.kernel.org, netdev@vger.kernel.org, paul@paul-moore.com,
brauner@kernel.org
Cc: torvalds@linux-foundation.org, linux-fsdevel@vger.kernel.org,
linux-security-module@vger.kernel.org, kernel-team@meta.com
Subject: [PATCH v2 bpf-next 12/30] libbpf: add bpf_token_create() API
Date: Tue, 23 Jan 2024 18:21:09 -0800 [thread overview]
Message-ID: <20240124022127.2379740-13-andrii@kernel.org> (raw)
In-Reply-To: <20240124022127.2379740-1-andrii@kernel.org>
Add low-level wrapper API for BPF_TOKEN_CREATE command in bpf() syscall.
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
---
tools/lib/bpf/bpf.c | 17 +++++++++++++++++
tools/lib/bpf/bpf.h | 24 ++++++++++++++++++++++++
tools/lib/bpf/libbpf.map | 1 +
3 files changed, 42 insertions(+)
diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index 9dc9625651dc..d4019928a864 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -1287,3 +1287,20 @@ int bpf_prog_bind_map(int prog_fd, int map_fd,
ret = sys_bpf(BPF_PROG_BIND_MAP, &attr, attr_sz);
return libbpf_err_errno(ret);
}
+
+int bpf_token_create(int bpffs_fd, struct bpf_token_create_opts *opts)
+{
+ const size_t attr_sz = offsetofend(union bpf_attr, token_create);
+ union bpf_attr attr;
+ int fd;
+
+ if (!OPTS_VALID(opts, bpf_token_create_opts))
+ return libbpf_err(-EINVAL);
+
+ memset(&attr, 0, attr_sz);
+ attr.token_create.bpffs_fd = bpffs_fd;
+ attr.token_create.flags = OPTS_GET(opts, flags, 0);
+
+ fd = sys_bpf_fd(BPF_TOKEN_CREATE, &attr, attr_sz);
+ return libbpf_err_errno(fd);
+}
diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h
index d0f53772bdc0..e49254c9f68f 100644
--- a/tools/lib/bpf/bpf.h
+++ b/tools/lib/bpf/bpf.h
@@ -640,6 +640,30 @@ struct bpf_test_run_opts {
LIBBPF_API int bpf_prog_test_run_opts(int prog_fd,
struct bpf_test_run_opts *opts);
+struct bpf_token_create_opts {
+ size_t sz; /* size of this struct for forward/backward compatibility */
+ __u32 flags;
+ size_t :0;
+};
+#define bpf_token_create_opts__last_field flags
+
+/**
+ * @brief **bpf_token_create()** creates a new instance of BPF token derived
+ * from specified BPF FS mount point.
+ *
+ * BPF token created with this API can be passed to bpf() syscall for
+ * commands like BPF_PROG_LOAD, BPF_MAP_CREATE, etc.
+ *
+ * @param bpffs_fd FD for BPF FS instance from which to derive a BPF token
+ * instance.
+ * @param opts optional BPF token creation options, can be NULL
+ *
+ * @return BPF token FD > 0, on success; negative error code, otherwise (errno
+ * is also set to the error code)
+ */
+LIBBPF_API int bpf_token_create(int bpffs_fd,
+ struct bpf_token_create_opts *opts);
+
#ifdef __cplusplus
} /* extern "C" */
#endif
diff --git a/tools/lib/bpf/libbpf.map b/tools/lib/bpf/libbpf.map
index 91c5aef7dae7..d9e1f57534fa 100644
--- a/tools/lib/bpf/libbpf.map
+++ b/tools/lib/bpf/libbpf.map
@@ -411,4 +411,5 @@ LIBBPF_1.3.0 {
} LIBBPF_1.2.0;
LIBBPF_1.4.0 {
+ bpf_token_create;
} LIBBPF_1.3.0;
--
2.34.1
next prev parent reply other threads:[~2024-01-24 2:22 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-24 2:20 [PATCH v2 bpf-next 00/30] BPF token Andrii Nakryiko
2024-01-24 2:20 ` [PATCH v2 bpf-next 01/30] bpf: align CAP_NET_ADMIN checks with bpf_capable() approach Andrii Nakryiko
2024-01-24 2:20 ` [PATCH v2 bpf-next 02/30] bpf: add BPF token delegation mount options to BPF FS Andrii Nakryiko
2024-01-24 2:21 ` [PATCH v2 bpf-next 03/30] bpf: introduce BPF token object Andrii Nakryiko
2024-01-24 2:21 ` [PATCH v2 bpf-next 04/30] bpf: add BPF token support to BPF_MAP_CREATE command Andrii Nakryiko
2024-01-24 2:21 ` [PATCH v2 bpf-next 05/30] bpf: add BPF token support to BPF_BTF_LOAD command Andrii Nakryiko
2024-01-24 2:21 ` [PATCH v2 bpf-next 06/30] bpf: add BPF token support to BPF_PROG_LOAD command Andrii Nakryiko
2024-01-24 2:21 ` [PATCH v2 bpf-next 07/30] bpf: take into account BPF token when fetching helper protos Andrii Nakryiko
2024-01-24 2:21 ` [PATCH v2 bpf-next 08/30] bpf: consistently use BPF token throughout BPF verifier logic Andrii Nakryiko
2024-01-24 2:21 ` [PATCH v2 bpf-next 09/30] bpf,lsm: refactor bpf_prog_alloc/bpf_prog_free LSM hooks Andrii Nakryiko
2024-01-24 2:21 ` [PATCH v2 bpf-next 10/30] bpf,lsm: refactor bpf_map_alloc/bpf_map_free " Andrii Nakryiko
2024-01-24 2:21 ` [PATCH v2 bpf-next 11/30] bpf,lsm: add BPF token " Andrii Nakryiko
2024-01-24 2:21 ` Andrii Nakryiko [this message]
2024-01-24 2:21 ` [PATCH v2 bpf-next 13/30] libbpf: add BPF token support to bpf_map_create() API Andrii Nakryiko
2024-01-24 2:21 ` [PATCH v2 bpf-next 14/30] libbpf: add BPF token support to bpf_btf_load() API Andrii Nakryiko
2024-01-24 2:21 ` [PATCH v2 bpf-next 15/30] libbpf: add BPF token support to bpf_prog_load() API Andrii Nakryiko
2024-01-24 2:21 ` [PATCH v2 bpf-next 16/30] selftests/bpf: add BPF token-enabled tests Andrii Nakryiko
2024-01-24 2:21 ` [PATCH v2 bpf-next 17/30] bpf,selinux: allocate bpf_security_struct per BPF token Andrii Nakryiko
2024-01-24 2:21 ` [PATCH v2 bpf-next 18/30] bpf: fail BPF_TOKEN_CREATE if no delegation option was set on BPF FS Andrii Nakryiko
2024-01-24 2:21 ` [PATCH v2 bpf-next 19/30] bpf: support symbolic BPF FS delegation mount options Andrii Nakryiko
2024-01-24 2:21 ` [PATCH v2 bpf-next 20/30] selftests/bpf: utilize string values for delegate_xxx " Andrii Nakryiko
2024-01-24 2:21 ` [PATCH v2 bpf-next 21/30] libbpf: split feature detectors definitions from cached results Andrii Nakryiko
2024-01-24 2:21 ` [PATCH v2 bpf-next 22/30] libbpf: further decouple feature checking logic from bpf_object Andrii Nakryiko
2024-01-24 2:21 ` [PATCH v2 bpf-next 23/30] libbpf: move feature detection code into its own file Andrii Nakryiko
2024-01-24 2:21 ` [PATCH v2 bpf-next 24/30] libbpf: wire up token_fd into feature probing logic Andrii Nakryiko
2024-01-24 2:21 ` [PATCH v2 bpf-next 25/30] libbpf: wire up BPF token support at BPF object level Andrii Nakryiko
2024-01-24 2:21 ` [PATCH v2 bpf-next 26/30] selftests/bpf: add BPF object loading tests with explicit token passing Andrii Nakryiko
2024-01-24 2:21 ` [PATCH v2 bpf-next 27/30] selftests/bpf: add tests for BPF object load with implicit token Andrii Nakryiko
2024-01-24 2:21 ` [PATCH v2 bpf-next 28/30] libbpf: support BPF token path setting through LIBBPF_BPF_TOKEN_PATH envvar Andrii Nakryiko
2024-01-24 2:21 ` [PATCH v2 bpf-next 29/30] selftests/bpf: add tests for " Andrii Nakryiko
2024-01-24 2:21 ` [PATCH v2 bpf-next 30/30] selftests/bpf: incorporate LSM policy to token-based tests Andrii Nakryiko
2024-01-25 0:10 ` [PATCH v2 bpf-next 00/30] BPF token patchwork-bot+netdevbpf
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