@@ -105,6 +105,7 @@ enum bpf_cmd {
BPF_BTF_GET_FD_BY_ID,
BPF_TASK_FD_QUERY,
BPF_MAP_LOOKUP_AND_DELETE_ELEM,
+ BPF_MAP_LOCK,
};
enum bpf_map_type {
@@ -255,8 +256,19 @@ enum bpf_attach_type {
*/
#define BPF_F_ANY_ALIGNMENT (1U << 1)
-/* when bpf_ldimm64->src_reg == BPF_PSEUDO_MAP_FD, bpf_ldimm64->imm == fd */
+/* When BPF ldimm64's insn[0].src_reg != 0 then this can have
+ * two extensions:
+ *
+ * insn[0].src_reg: BPF_PSEUDO_MAP_FD BPF_PSEUDO_MAP_VALUE
+ * insn[0].imm: map fd map fd
+ * insn[1].imm: 0 offset into value
+ * insn[0].off: 0 lower 16 bit of map index
+ * insn[1].off: 0 higher 16 bit of map index
+ * ldimm64 rewrite: address of map address of map[index]+offset
+ * verifier type: CONST_PTR_TO_MAP PTR_TO_MAP_VALUE
+ */
#define BPF_PSEUDO_MAP_FD 1
+#define BPF_PSEUDO_MAP_VALUE 2
/* when bpf_call->src_reg == BPF_PSEUDO_CALL, bpf_call->imm == pc-relative
* offset to another bpf function
@@ -283,7 +295,7 @@ enum bpf_attach_type {
#define BPF_OBJ_NAME_LEN 16U
-/* Flags for accessing BPF object */
+/* Flags for accessing BPF object from syscall side. */
#define BPF_F_RDONLY (1U << 3)
#define BPF_F_WRONLY (1U << 4)
@@ -293,6 +305,14 @@ enum bpf_attach_type {
/* Zero-initialize hash function seed. This should only be used for testing. */
#define BPF_F_ZERO_SEED (1U << 6)
+/* Flags for accessing BPF object from program side. */
+#define BPF_F_RDONLY_PROG (1U << 7)
+#define BPF_F_WRONLY_PROG (1U << 8)
+#define BPF_F_ACCESS_MASK (BPF_F_RDONLY | \
+ BPF_F_RDONLY_PROG | \
+ BPF_F_WRONLY | \
+ BPF_F_WRONLY_PROG)
+
/* flags for BPF_PROG_QUERY */
#define BPF_F_QUERY_EFFECTIVE (1U << 0)
@@ -39,11 +39,11 @@ struct btf_type {
* struct, union and fwd
*/
__u32 info;
- /* "size" is used by INT, ENUM, STRUCT and UNION.
+ /* "size" is used by INT, ENUM, STRUCT, UNION and DATASEC.
* "size" tells the size of the type it is describing.
*
* "type" is used by PTR, TYPEDEF, VOLATILE, CONST, RESTRICT,
- * FUNC and FUNC_PROTO.
+ * FUNC, FUNC_PROTO and VAR.
* "type" is a type_id referring to another type.
*/
union {
@@ -70,8 +70,10 @@ struct btf_type {
#define BTF_KIND_RESTRICT 11 /* Restrict */
#define BTF_KIND_FUNC 12 /* Function */
#define BTF_KIND_FUNC_PROTO 13 /* Function Proto */
-#define BTF_KIND_MAX 13
-#define NR_BTF_KINDS 14
+#define BTF_KIND_VAR 14 /* Variable */
+#define BTF_KIND_DATASEC 15 /* Section */
+#define BTF_KIND_MAX BTF_KIND_DATASEC
+#define NR_BTF_KINDS (BTF_KIND_MAX + 1)
/* For some specific BTF_KIND, "struct btf_type" is immediately
* followed by extra data.
@@ -138,4 +140,26 @@ struct btf_param {
__u32 type;
};
+enum {
+ BTF_VAR_STATIC = 0,
+ BTF_VAR_GLOBAL_ALLOCATED,
+};
+
+/* BTF_KIND_VAR is followed by a single "struct btf_var" to describe
+ * additional information related to the variable such as its linkage.
+ */
+struct btf_var {
+ __u32 linkage;
+};
+
+/* BTF_KIND_DATASEC is followed by multiple "struct btf_var_secinfo"
+ * to describe all BTF_KIND_VAR types it contains along with it's
+ * in-section offset as well as size.
+ */
+struct btf_var_secinfo {
+ __u32 type;
+ __u32 offset;
+ __u32 size;
+};
+
#endif /* _UAPI__LINUX_BTF_H__ */
Pull in latest changes from both headers, so we can make use of them in libbpf. Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> --- tools/include/uapi/linux/bpf.h | 24 ++++++++++++++++++++++-- tools/include/uapi/linux/btf.h | 32 ++++++++++++++++++++++++++++---- 2 files changed, 50 insertions(+), 6 deletions(-)