[LTP] [PATCH v2 1/4] BPF: Essential headers for map creation
Richard Palethorpe
rpalethorpe@suse.com
Tue Jul 30 15:44:54 CEST 2019
Signed-off-by: Richard Palethorpe <rpalethorpe@suse.com>
---
V2:
* Added bpf_prog01 test
* Removed root check and instead signal TCONF if bpf fails with EPERM
* Added more headers, including for byte code and old distro's
include/lapi/bpf.h | 242 +++++++++++++++++++++++++++++++
include/lapi/syscalls/aarch64.in | 1 +
include/lapi/syscalls/i386.in | 1 +
include/lapi/syscalls/s390.in | 1 +
include/lapi/syscalls/sparc.in | 1 +
include/lapi/syscalls/x86_64.in | 1 +
6 files changed, 247 insertions(+)
create mode 100644 include/lapi/bpf.h
diff --git a/include/lapi/bpf.h b/include/lapi/bpf.h
new file mode 100644
index 000000000..369de0175
--- /dev/null
+++ b/include/lapi/bpf.h
@@ -0,0 +1,242 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2019 Richard Palethorpe <rpalethorpe@suse.com>
+ *
+ * Essential Extended Berkeley Packet Filter (eBPF) headers
+ *
+ * Mostly copied/adapted from linux/bpf.h and libbpf so that we can perform
+ * some eBPF testing without any external dependencies.
+ */
+
+#ifndef BPF_H
+# define BPF_H
+
+#include <stdint.h>
+
+#include "lapi/syscalls.h"
+
+/* Start copy from linux/bpf.h */
+enum bpf_cmd {
+ BPF_MAP_CREATE,
+ BPF_MAP_LOOKUP_ELEM,
+ BPF_MAP_UPDATE_ELEM,
+ BPF_MAP_DELETE_ELEM,
+ BPF_MAP_GET_NEXT_KEY,
+ BPF_PROG_LOAD,
+ BPF_OBJ_PIN,
+ BPF_OBJ_GET,
+ BPF_PROG_ATTACH,
+ BPF_PROG_DETACH,
+ BPF_PROG_TEST_RUN,
+ BPF_PROG_GET_NEXT_ID,
+ BPF_MAP_GET_NEXT_ID,
+ BPF_PROG_GET_FD_BY_ID,
+ BPF_MAP_GET_FD_BY_ID,
+ BPF_OBJ_GET_INFO_BY_FD,
+ BPF_PROG_QUERY,
+ BPF_RAW_TRACEPOINT_OPEN,
+ BPF_BTF_LOAD,
+ BPF_BTF_GET_FD_BY_ID,
+ BPF_TASK_FD_QUERY,
+ BPF_MAP_LOOKUP_AND_DELETE_ELEM,
+ BPF_MAP_FREEZE,
+};
+
+enum bpf_map_type {
+ BPF_MAP_TYPE_UNSPEC,
+ BPF_MAP_TYPE_HASH,
+ BPF_MAP_TYPE_ARRAY,
+ BPF_MAP_TYPE_PROG_ARRAY,
+ BPF_MAP_TYPE_PERF_EVENT_ARRAY,
+ BPF_MAP_TYPE_PERCPU_HASH,
+ BPF_MAP_TYPE_PERCPU_ARRAY,
+ BPF_MAP_TYPE_STACK_TRACE,
+ BPF_MAP_TYPE_CGROUP_ARRAY,
+ BPF_MAP_TYPE_LRU_HASH,
+ BPF_MAP_TYPE_LRU_PERCPU_HASH,
+ BPF_MAP_TYPE_LPM_TRIE,
+ BPF_MAP_TYPE_ARRAY_OF_MAPS,
+ BPF_MAP_TYPE_HASH_OF_MAPS,
+ BPF_MAP_TYPE_DEVMAP,
+ BPF_MAP_TYPE_SOCKMAP,
+ BPF_MAP_TYPE_CPUMAP,
+ BPF_MAP_TYPE_XSKMAP,
+ BPF_MAP_TYPE_SOCKHASH,
+ BPF_MAP_TYPE_CGROUP_STORAGE,
+ BPF_MAP_TYPE_REUSEPORT_SOCKARRAY,
+ BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE,
+ BPF_MAP_TYPE_QUEUE,
+ BPF_MAP_TYPE_STACK,
+ BPF_MAP_TYPE_SK_STORAGE,
+};
+
+#define BPF_OBJ_NAME_LEN 16U
+
+#define BPF_ANY 0 /* create new element or update existing */
+#define BPF_NOEXIST 1 /* create new element if it didn't exist */
+#define BPF_EXIST 2 /* update existing element */
+#define BPF_F_LOCK 4 /* spin_lock-ed map_lookup/map_update */
+
+#define aligned_uint64_t uint64_t __attribute__((aligned(8)))
+
+union bpf_attr {
+ struct { /* anonymous struct used by BPF_MAP_CREATE command */
+ uint32_t map_type; /* one of enum bpf_map_type */
+ uint32_t key_size; /* size of key in bytes */
+ uint32_t value_size; /* size of value in bytes */
+ uint32_t max_entries; /* max number of entries in a map */
+ uint32_t map_flags; /* BPF_MAP_CREATE related
+ * flags defined above.
+ */
+ uint32_t inner_map_fd; /* fd pointing to the inner map */
+ uint32_t numa_node; /* numa node (effective only if
+ * BPF_F_NUMA_NODE is set).
+ */
+ char map_name[BPF_OBJ_NAME_LEN];
+ uint32_t map_ifindex; /* ifindex of netdev to create on */
+ uint32_t btf_fd; /* fd pointing to a BTF type data */
+ uint32_t btf_key_type_id; /* BTF type_id of the key */
+ uint32_t btf_value_type_id; /* BTF type_id of the value */
+ };
+
+ struct { /* anonymous struct used by BPF_MAP_*_ELEM commands */
+ uint32_t map_fd;
+ aligned_uint64_t key;
+ union {
+ aligned_uint64_t value;
+ aligned_uint64_t next_key;
+ };
+ uint64_t flags;
+ };
+
+ struct { /* anonymous struct used by BPF_PROG_LOAD command */
+ uint32_t prog_type; /* one of enum bpf_prog_type */
+ uint32_t insn_cnt;
+ aligned_uint64_t insns;
+ aligned_uint64_t license;
+ uint32_t log_level; /* verbosity level of verifier */
+ uint32_t log_size; /* size of user buffer */
+ aligned_uint64_t log_buf; /* user supplied buffer */
+ uint32_t kern_version; /* not used */
+ uint32_t prog_flags;
+ char prog_name[BPF_OBJ_NAME_LEN];
+ uint32_t prog_ifindex; /* ifindex of netdev to prep for */
+ /* For some prog types expected attach type must be known at
+ * load time to verify attach type specific parts of prog
+ * (context accesses, allowed helpers, etc).
+ */
+ uint32_t expected_attach_type;
+ uint32_t prog_btf_fd; /* fd pointing to BTF type data */
+ uint32_t func_info_rec_size; /* userspace bpf_func_info size */
+ aligned_uint64_t func_info; /* func info */
+ uint32_t func_info_cnt; /* number of bpf_func_info records */
+ uint32_t line_info_rec_size; /* userspace bpf_line_info size */
+ aligned_uint64_t line_info; /* line info */
+ uint32_t line_info_cnt; /* number of bpf_line_info records */
+ };
+
+ struct { /* anonymous struct used by BPF_OBJ_* commands */
+ aligned_uint64_t pathname;
+ uint32_t bpf_fd;
+ uint32_t file_flags;
+ };
+
+ struct { /* anonymous struct used by BPF_PROG_ATTACH/DETACH commands */
+ uint32_t target_fd; /* container object to attach to */
+ uint32_t attach_bpf_fd; /* eBPF program to attach */
+ uint32_t attach_type;
+ uint32_t attach_flags;
+ };
+
+ struct { /* anonymous struct used by BPF_PROG_TEST_RUN command */
+ uint32_t prog_fd;
+ uint32_t retval;
+ uint32_t data_size_in; /* input: len of data_in */
+ uint32_t data_size_out; /* input/output: len of data_out
+ * returns ENOSPC if data_out
+ * is too small.
+ */
+ aligned_uint64_t data_in;
+ aligned_uint64_t data_out;
+ uint32_t repeat;
+ uint32_t duration;
+ uint32_t ctx_size_in; /* input: len of ctx_in */
+ uint32_t ctx_size_out; /* input/output: len of ctx_out
+ * returns ENOSPC if ctx_out
+ * is too small.
+ */
+ aligned_uint64_t ctx_in;
+ aligned_uint64_t ctx_out;
+ } test;
+
+ struct { /* anonymous struct used by BPF_*_GET_*_ID */
+ union {
+ uint32_t start_id;
+ uint32_t prog_id;
+ uint32_t map_id;
+ uint32_t btf_id;
+ };
+ uint32_t next_id;
+ uint32_t open_flags;
+ };
+
+ struct { /* anonymous struct used by BPF_OBJ_GET_INFO_BY_FD */
+ uint32_t bpf_fd;
+ uint32_t info_len;
+ aligned_uint64_t info;
+ } info;
+
+ struct { /* anonymous struct used by BPF_PROG_QUERY command */
+ uint32_t target_fd; /* container object to query */
+ uint32_t attach_type;
+ uint32_t query_flags;
+ uint32_t attach_flags;
+ aligned_uint64_t prog_ids;
+ uint32_t prog_cnt;
+ } query;
+
+ struct {
+ uint64_t name;
+ uint32_t prog_fd;
+ } raw_tracepoint;
+
+ struct { /* anonymous struct for BPF_BTF_LOAD */
+ aligned_uint64_t btf;
+ aligned_uint64_t btf_log_buf;
+ uint32_t btf_size;
+ uint32_t btf_log_size;
+ uint32_t btf_log_level;
+ };
+
+ struct {
+ uint32_t pid; /* input: pid */
+ uint32_t fd; /* input: fd */
+ uint32_t flags; /* input: flags */
+ uint32_t buf_len; /* input/output: buf len */
+ aligned_uint64_t buf; /* input/output:
+ * tp_name for tracepoint
+ * symbol for kprobe
+ * filename for uprobe
+ */
+ uint32_t prog_id; /* output: prod_id */
+ uint32_t fd_type; /* output: BPF_FD_TYPE_* */
+ uint64_t probe_offset; /* output: probe_offset */
+ uint64_t probe_addr; /* output: probe_addr */
+ } task_fd_query;
+} __attribute__((aligned(8)));
+
+/* End copy from linux/bpf.h */
+
+/* Start copy from tools/lib/bpf */
+inline uint64_t ptr_to_u64(const void *ptr)
+{
+ return (uint64_t) (unsigned long) ptr;
+}
+
+inline int bpf(enum bpf_cmd cmd, union bpf_attr *attr, unsigned int size)
+{
+ return tst_syscall(__NR_bpf, cmd, attr, size);
+}
+/* End copy from tools/lib/bpf */
+
+#endif /* BPF_H */
diff --git a/include/lapi/syscalls/aarch64.in b/include/lapi/syscalls/aarch64.in
index 7db6e281c..0e00641bc 100644
--- a/include/lapi/syscalls/aarch64.in
+++ b/include/lapi/syscalls/aarch64.in
@@ -258,6 +258,7 @@ process_vm_writev 271
kcmp 272
getrandom 278
memfd_create 279
+bpf 280
userfaultfd 282
membarrier 283
execveat 281
diff --git a/include/lapi/syscalls/i386.in b/include/lapi/syscalls/i386.in
index 02f3955ba..87ab46933 100644
--- a/include/lapi/syscalls/i386.in
+++ b/include/lapi/syscalls/i386.in
@@ -340,6 +340,7 @@ sched_getattr 352
renameat2 354
getrandom 355
memfd_create 356
+bpf 357
execveat 358
userfaultfd 374
membarrier 375
diff --git a/include/lapi/syscalls/s390.in b/include/lapi/syscalls/s390.in
index c304ef4b7..d3f7eb1f6 100644
--- a/include/lapi/syscalls/s390.in
+++ b/include/lapi/syscalls/s390.in
@@ -331,6 +331,7 @@ sched_getattr 346
renameat2 347
getrandom 349
memfd_create 350
+bpf 351
userfaultfd 355
membarrier 356
execveat 354
diff --git a/include/lapi/syscalls/sparc.in b/include/lapi/syscalls/sparc.in
index ab7204663..94a672428 100644
--- a/include/lapi/syscalls/sparc.in
+++ b/include/lapi/syscalls/sparc.in
@@ -336,6 +336,7 @@ kcmp 341
renameat2 345
getrandom 347
memfd_create 348
+bpf 349
membarrier 351
userfaultfd 352
execveat 350
diff --git a/include/lapi/syscalls/x86_64.in b/include/lapi/syscalls/x86_64.in
index fdb414c10..b1cbd4f2f 100644
--- a/include/lapi/syscalls/x86_64.in
+++ b/include/lapi/syscalls/x86_64.in
@@ -307,6 +307,7 @@ sched_getattr 315
renameat2 316
getrandom 318
memfd_create 319
+bpf 321
execveat 322
userfaultfd 323
membarrier 324
--
2.22.0
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