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Date: Thu, 7 Dec 2023 14:27:53 -0800
From: Andrii Nakryiko <andrii@...nel.org>
To: <bpf@...r.kernel.org>, <netdev@...r.kernel.org>, <paul@...l-moore.com>,
<brauner@...nel.org>
CC: <linux-fsdevel@...r.kernel.org>, <linux-security-module@...r.kernel.org>,
<keescook@...omium.org>, <kernel-team@...a.com>, <sargun@...gun.me>
Subject: [PATCH RFC bpf-next 1/3] bpf: add mapper macro for bpf_cmd enum
Use similar approach to enum bpf_func_id and generate enumerators using
a macro with macro callback. This approach allows to generate derivative
tables for string-based lookups and whatnot. In this particular case,
this mapper macro will be used for parsing BPF FS delegate_cmds mount
option and their human-readable output format in mount info.
Validated no regressions using before/after BTF through
`bpftool btf dump <file> format c` command.
Signed-off-by: Andrii Nakryiko <andrii@...nel.org>
---
include/uapi/linux/bpf.h | 81 ++++++++++++++++++----------------
tools/include/uapi/linux/bpf.h | 81 ++++++++++++++++++----------------
2 files changed, 86 insertions(+), 76 deletions(-)
diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
index e0545201b55f..d05ea24ace3f 100644
--- a/include/uapi/linux/bpf.h
+++ b/include/uapi/linux/bpf.h
@@ -893,47 +893,52 @@ union bpf_iter_link_info {
* to the object have been closed and no references remain pinned to the
* filesystem or attached (for example, bound to a program or device).
*/
+#define __BPF_CMD_MAPPER(FN, ctx...) \
+ FN(BPF_MAP_CREATE, 0) \
+ FN(BPF_MAP_LOOKUP_ELEM, 1) \
+ FN(BPF_MAP_UPDATE_ELEM, 2) \
+ FN(BPF_MAP_DELETE_ELEM, 3) \
+ FN(BPF_MAP_GET_NEXT_KEY, 4) \
+ FN(BPF_PROG_LOAD, 5) \
+ FN(BPF_OBJ_PIN, 6) \
+ FN(BPF_OBJ_GET, 7) \
+ FN(BPF_PROG_ATTACH, 8) \
+ FN(BPF_PROG_DETACH, 9) \
+ FN(BPF_PROG_TEST_RUN, 10) \
+ FN(BPF_PROG_RUN, 10) /* alias for BPF_PROG_TEST_RUN */ \
+ FN(BPF_PROG_GET_NEXT_ID, 11) \
+ FN(BPF_MAP_GET_NEXT_ID, 12) \
+ FN(BPF_PROG_GET_FD_BY_ID, 13) \
+ FN(BPF_MAP_GET_FD_BY_ID, 14) \
+ FN(BPF_OBJ_GET_INFO_BY_FD, 15) \
+ FN(BPF_PROG_QUERY, 16) \
+ FN(BPF_RAW_TRACEPOINT_OPEN, 17) \
+ FN(BPF_BTF_LOAD, 18) \
+ FN(BPF_BTF_GET_FD_BY_ID, 19) \
+ FN(BPF_TASK_FD_QUERY, 20) \
+ FN(BPF_MAP_LOOKUP_AND_DELETE_ELEM, 21) \
+ FN(BPF_MAP_FREEZE, 22) \
+ FN(BPF_BTF_GET_NEXT_ID, 23) \
+ FN(BPF_MAP_LOOKUP_BATCH, 24) \
+ FN(BPF_MAP_LOOKUP_AND_DELETE_BATCH, 25) \
+ FN(BPF_MAP_UPDATE_BATCH, 26) \
+ FN(BPF_MAP_DELETE_BATCH, 27) \
+ FN(BPF_LINK_CREATE, 28) \
+ FN(BPF_LINK_UPDATE, 29) \
+ FN(BPF_LINK_GET_FD_BY_ID, 30) \
+ FN(BPF_LINK_GET_NEXT_ID, 31) \
+ FN(BPF_ENABLE_STATS, 32) \
+ FN(BPF_ITER_CREATE, 33) \
+ FN(BPF_LINK_DETACH, 34) \
+ FN(BPF_PROG_BIND_MAP, 35) \
+ FN(BPF_TOKEN_CREATE, 36) \
+ /* */
+#define __BPF_CMD_FN(x, y) x = y,
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_RUN = 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,
- BPF_BTF_GET_NEXT_ID,
- BPF_MAP_LOOKUP_BATCH,
- BPF_MAP_LOOKUP_AND_DELETE_BATCH,
- BPF_MAP_UPDATE_BATCH,
- BPF_MAP_DELETE_BATCH,
- BPF_LINK_CREATE,
- BPF_LINK_UPDATE,
- BPF_LINK_GET_FD_BY_ID,
- BPF_LINK_GET_NEXT_ID,
- BPF_ENABLE_STATS,
- BPF_ITER_CREATE,
- BPF_LINK_DETACH,
- BPF_PROG_BIND_MAP,
- BPF_TOKEN_CREATE,
+ __BPF_CMD_MAPPER(__BPF_CMD_FN)
__MAX_BPF_CMD,
};
+#undef __BPF_CMD_FN
enum bpf_map_type {
BPF_MAP_TYPE_UNSPEC,
diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h
index e0545201b55f..d05ea24ace3f 100644
--- a/tools/include/uapi/linux/bpf.h
+++ b/tools/include/uapi/linux/bpf.h
@@ -893,47 +893,52 @@ union bpf_iter_link_info {
* to the object have been closed and no references remain pinned to the
* filesystem or attached (for example, bound to a program or device).
*/
+#define __BPF_CMD_MAPPER(FN, ctx...) \
+ FN(BPF_MAP_CREATE, 0) \
+ FN(BPF_MAP_LOOKUP_ELEM, 1) \
+ FN(BPF_MAP_UPDATE_ELEM, 2) \
+ FN(BPF_MAP_DELETE_ELEM, 3) \
+ FN(BPF_MAP_GET_NEXT_KEY, 4) \
+ FN(BPF_PROG_LOAD, 5) \
+ FN(BPF_OBJ_PIN, 6) \
+ FN(BPF_OBJ_GET, 7) \
+ FN(BPF_PROG_ATTACH, 8) \
+ FN(BPF_PROG_DETACH, 9) \
+ FN(BPF_PROG_TEST_RUN, 10) \
+ FN(BPF_PROG_RUN, 10) /* alias for BPF_PROG_TEST_RUN */ \
+ FN(BPF_PROG_GET_NEXT_ID, 11) \
+ FN(BPF_MAP_GET_NEXT_ID, 12) \
+ FN(BPF_PROG_GET_FD_BY_ID, 13) \
+ FN(BPF_MAP_GET_FD_BY_ID, 14) \
+ FN(BPF_OBJ_GET_INFO_BY_FD, 15) \
+ FN(BPF_PROG_QUERY, 16) \
+ FN(BPF_RAW_TRACEPOINT_OPEN, 17) \
+ FN(BPF_BTF_LOAD, 18) \
+ FN(BPF_BTF_GET_FD_BY_ID, 19) \
+ FN(BPF_TASK_FD_QUERY, 20) \
+ FN(BPF_MAP_LOOKUP_AND_DELETE_ELEM, 21) \
+ FN(BPF_MAP_FREEZE, 22) \
+ FN(BPF_BTF_GET_NEXT_ID, 23) \
+ FN(BPF_MAP_LOOKUP_BATCH, 24) \
+ FN(BPF_MAP_LOOKUP_AND_DELETE_BATCH, 25) \
+ FN(BPF_MAP_UPDATE_BATCH, 26) \
+ FN(BPF_MAP_DELETE_BATCH, 27) \
+ FN(BPF_LINK_CREATE, 28) \
+ FN(BPF_LINK_UPDATE, 29) \
+ FN(BPF_LINK_GET_FD_BY_ID, 30) \
+ FN(BPF_LINK_GET_NEXT_ID, 31) \
+ FN(BPF_ENABLE_STATS, 32) \
+ FN(BPF_ITER_CREATE, 33) \
+ FN(BPF_LINK_DETACH, 34) \
+ FN(BPF_PROG_BIND_MAP, 35) \
+ FN(BPF_TOKEN_CREATE, 36) \
+ /* */
+#define __BPF_CMD_FN(x, y) x = y,
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_RUN = 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,
- BPF_BTF_GET_NEXT_ID,
- BPF_MAP_LOOKUP_BATCH,
- BPF_MAP_LOOKUP_AND_DELETE_BATCH,
- BPF_MAP_UPDATE_BATCH,
- BPF_MAP_DELETE_BATCH,
- BPF_LINK_CREATE,
- BPF_LINK_UPDATE,
- BPF_LINK_GET_FD_BY_ID,
- BPF_LINK_GET_NEXT_ID,
- BPF_ENABLE_STATS,
- BPF_ITER_CREATE,
- BPF_LINK_DETACH,
- BPF_PROG_BIND_MAP,
- BPF_TOKEN_CREATE,
+ __BPF_CMD_MAPPER(__BPF_CMD_FN)
__MAX_BPF_CMD,
};
+#undef __BPF_CMD_FN
enum bpf_map_type {
BPF_MAP_TYPE_UNSPEC,
--
2.34.1
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