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-rw-r--r--include/linux/bpf.h44
-rw-r--r--include/linux/bpf_verifier.h8
-rw-r--r--include/linux/btf.h32
-rw-r--r--include/linux/extable.h10
-rw-r--r--include/linux/filter.h6
5 files changed, 92 insertions, 8 deletions
diff --git a/include/linux/bpf.h b/include/linux/bpf.h
index 282e28bf41ec..171be30fe0ae 100644
--- a/include/linux/bpf.h
+++ b/include/linux/bpf.h
@@ -16,6 +16,7 @@
#include <linux/u64_stats_sync.h>
struct bpf_verifier_env;
+struct bpf_verifier_log;
struct perf_event;
struct bpf_prog;
struct bpf_map;
@@ -23,6 +24,7 @@ struct sock;
struct seq_file;
struct btf;
struct btf_type;
+struct exception_table_entry;
extern struct idr btf_idr;
extern spinlock_t btf_idr_lock;
@@ -211,6 +213,7 @@ enum bpf_arg_type {
ARG_PTR_TO_INT, /* pointer to int */
ARG_PTR_TO_LONG, /* pointer to long */
ARG_PTR_TO_SOCKET, /* pointer to bpf_sock (fullsock) */
+ ARG_PTR_TO_BTF_ID, /* pointer to in-kernel struct */
};
/* type of values returned from helper functions */
@@ -233,11 +236,17 @@ struct bpf_func_proto {
bool gpl_only;
bool pkt_access;
enum bpf_return_type ret_type;
- enum bpf_arg_type arg1_type;
- enum bpf_arg_type arg2_type;
- enum bpf_arg_type arg3_type;
- enum bpf_arg_type arg4_type;
- enum bpf_arg_type arg5_type;
+ union {
+ struct {
+ enum bpf_arg_type arg1_type;
+ enum bpf_arg_type arg2_type;
+ enum bpf_arg_type arg3_type;
+ enum bpf_arg_type arg4_type;
+ enum bpf_arg_type arg5_type;
+ };
+ enum bpf_arg_type arg_type[5];
+ };
+ u32 *btf_id; /* BTF ids of arguments */
};
/* bpf_context is intentionally undefined structure. Pointer to bpf_context is
@@ -281,6 +290,7 @@ enum bpf_reg_type {
PTR_TO_TCP_SOCK_OR_NULL, /* reg points to struct tcp_sock or NULL */
PTR_TO_TP_BUFFER, /* reg points to a writable raw tp's buffer */
PTR_TO_XDP_SOCK, /* reg points to struct xdp_sock */
+ PTR_TO_BTF_ID, /* reg points to kernel struct */
};
/* The information passed from prog-specific *_is_valid_access
@@ -288,7 +298,11 @@ enum bpf_reg_type {
*/
struct bpf_insn_access_aux {
enum bpf_reg_type reg_type;
- int ctx_field_size;
+ union {
+ int ctx_field_size;
+ u32 btf_id;
+ };
+ struct bpf_verifier_log *log; /* for verbose logs */
};
static inline void
@@ -375,8 +389,14 @@ struct bpf_prog_aux {
u32 id;
u32 func_cnt; /* used by non-func prog as the number of func progs */
u32 func_idx; /* 0 for non-func prog, the index in func array for func prog */
+ u32 attach_btf_id; /* in-kernel BTF type id to attach to */
bool verifier_zext; /* Zero extensions has been inserted by verifier. */
bool offload_requested;
+ bool attach_btf_trace; /* true if attaching to BTF-enabled raw tp */
+ /* BTF_KIND_FUNC_PROTO for valid attach_btf_id */
+ const struct btf_type *attach_func_proto;
+ /* function name for valid attach_btf_id */
+ const char *attach_func_name;
struct bpf_prog **func;
void *jit_data; /* JIT specific data. arch dependent */
struct latch_tree_node ksym_tnode;
@@ -416,6 +436,8 @@ struct bpf_prog_aux {
* main prog always has linfo_idx == 0
*/
u32 linfo_idx;
+ u32 num_exentries;
+ struct exception_table_entry *extable;
struct bpf_prog_stats __percpu *stats;
union {
struct work_struct work;
@@ -482,6 +504,7 @@ struct bpf_event_entry {
bool bpf_prog_array_compatible(struct bpf_array *array, const struct bpf_prog *fp);
int bpf_prog_calc_tag(struct bpf_prog *fp);
+const char *kernel_type_name(u32 btf_type_id);
const struct bpf_func_proto *bpf_get_trace_printk_proto(void);
@@ -747,6 +770,15 @@ int bpf_prog_test_run_skb(struct bpf_prog *prog, const union bpf_attr *kattr,
int bpf_prog_test_run_flow_dissector(struct bpf_prog *prog,
const union bpf_attr *kattr,
union bpf_attr __user *uattr);
+bool btf_ctx_access(int off, int size, enum bpf_access_type type,
+ const struct bpf_prog *prog,
+ struct bpf_insn_access_aux *info);
+int btf_struct_access(struct bpf_verifier_log *log,
+ const struct btf_type *t, int off, int size,
+ enum bpf_access_type atype,
+ u32 *next_btf_id);
+u32 btf_resolve_helper_id(struct bpf_verifier_log *log, void *, int);
+
#else /* !CONFIG_BPF_SYSCALL */
static inline struct bpf_prog *bpf_prog_get(u32 ufd)
{
diff --git a/include/linux/bpf_verifier.h b/include/linux/bpf_verifier.h
index 26a6d58ca78c..6e7284ea1468 100644
--- a/include/linux/bpf_verifier.h
+++ b/include/linux/bpf_verifier.h
@@ -52,6 +52,8 @@ struct bpf_reg_state {
*/
struct bpf_map *map_ptr;
+ u32 btf_id; /* for PTR_TO_BTF_ID */
+
/* Max size from any of the above. */
unsigned long raw;
};
@@ -330,10 +332,12 @@ static inline bool bpf_verifier_log_full(const struct bpf_verifier_log *log)
#define BPF_LOG_STATS 4
#define BPF_LOG_LEVEL (BPF_LOG_LEVEL1 | BPF_LOG_LEVEL2)
#define BPF_LOG_MASK (BPF_LOG_LEVEL | BPF_LOG_STATS)
+#define BPF_LOG_KERNEL (BPF_LOG_MASK + 1) /* kernel internal flag */
static inline bool bpf_verifier_log_needed(const struct bpf_verifier_log *log)
{
- return log->level && log->ubuf && !bpf_verifier_log_full(log);
+ return (log->level && log->ubuf && !bpf_verifier_log_full(log)) ||
+ log->level == BPF_LOG_KERNEL;
}
#define BPF_MAX_SUBPROGS 256
@@ -397,6 +401,8 @@ __printf(2, 0) void bpf_verifier_vlog(struct bpf_verifier_log *log,
const char *fmt, va_list args);
__printf(2, 3) void bpf_verifier_log_write(struct bpf_verifier_env *env,
const char *fmt, ...);
+__printf(2, 3) void bpf_log(struct bpf_verifier_log *log,
+ const char *fmt, ...);
static inline struct bpf_func_state *cur_func(struct bpf_verifier_env *env)
{
diff --git a/include/linux/btf.h b/include/linux/btf.h
index 64cdf2a23d42..9dee00859c5f 100644
--- a/include/linux/btf.h
+++ b/include/linux/btf.h
@@ -5,6 +5,7 @@
#define _LINUX_BTF_H 1
#include <linux/types.h>
+#include <uapi/linux/btf.h>
struct btf;
struct btf_member;
@@ -53,9 +54,40 @@ bool btf_member_is_reg_int(const struct btf *btf, const struct btf_type *s,
int btf_find_spin_lock(const struct btf *btf, const struct btf_type *t);
bool btf_type_is_void(const struct btf_type *t);
+static inline bool btf_type_is_ptr(const struct btf_type *t)
+{
+ return BTF_INFO_KIND(t->info) == BTF_KIND_PTR;
+}
+
+static inline bool btf_type_is_int(const struct btf_type *t)
+{
+ return BTF_INFO_KIND(t->info) == BTF_KIND_INT;
+}
+
+static inline bool btf_type_is_enum(const struct btf_type *t)
+{
+ return BTF_INFO_KIND(t->info) == BTF_KIND_ENUM;
+}
+
+static inline bool btf_type_is_typedef(const struct btf_type *t)
+{
+ return BTF_INFO_KIND(t->info) == BTF_KIND_TYPEDEF;
+}
+
+static inline bool btf_type_is_func(const struct btf_type *t)
+{
+ return BTF_INFO_KIND(t->info) == BTF_KIND_FUNC;
+}
+
+static inline bool btf_type_is_func_proto(const struct btf_type *t)
+{
+ return BTF_INFO_KIND(t->info) == BTF_KIND_FUNC_PROTO;
+}
+
#ifdef CONFIG_BPF_SYSCALL
const struct btf_type *btf_type_by_id(const struct btf *btf, u32 type_id);
const char *btf_name_by_offset(const struct btf *btf, u32 offset);
+struct btf *btf_parse_vmlinux(void);
#else
static inline const struct btf_type *btf_type_by_id(const struct btf *btf,
u32 type_id)
diff --git a/include/linux/extable.h b/include/linux/extable.h
index 81ecfaa83ad3..4ab9e78f313b 100644
--- a/include/linux/extable.h
+++ b/include/linux/extable.h
@@ -33,4 +33,14 @@ search_module_extables(unsigned long addr)
}
#endif /*CONFIG_MODULES*/
+#ifdef CONFIG_BPF_JIT
+const struct exception_table_entry *search_bpf_extables(unsigned long addr);
+#else
+static inline const struct exception_table_entry *
+search_bpf_extables(unsigned long addr)
+{
+ return NULL;
+}
+#endif
+
#endif /* _LINUX_EXTABLE_H */
diff --git a/include/linux/filter.h b/include/linux/filter.h
index 2ce57645f3cd..22ebea2e64ea 100644
--- a/include/linux/filter.h
+++ b/include/linux/filter.h
@@ -65,6 +65,9 @@ struct ctl_table_header;
/* unused opcode to mark special call to bpf_tail_call() helper */
#define BPF_TAIL_CALL 0xf0
+/* unused opcode to mark special load instruction. Same as BPF_ABS */
+#define BPF_PROBE_MEM 0x20
+
/* unused opcode to mark call to interpreter with arguments */
#define BPF_CALL_ARGS 0xe0
@@ -464,10 +467,11 @@ static inline bool insn_is_zext(const struct bpf_insn *insn)
#define BPF_CALL_x(x, name, ...) \
static __always_inline \
u64 ____##name(__BPF_MAP(x, __BPF_DECL_ARGS, __BPF_V, __VA_ARGS__)); \
+ typedef u64 (*btf_##name)(__BPF_MAP(x, __BPF_DECL_ARGS, __BPF_V, __VA_ARGS__)); \
u64 name(__BPF_REG(x, __BPF_DECL_REGS, __BPF_N, __VA_ARGS__)); \
u64 name(__BPF_REG(x, __BPF_DECL_REGS, __BPF_N, __VA_ARGS__)) \
{ \
- return ____##name(__BPF_MAP(x,__BPF_CAST,__BPF_N,__VA_ARGS__));\
+ return ((btf_##name)____##name)(__BPF_MAP(x,__BPF_CAST,__BPF_N,__VA_ARGS__));\
} \
static __always_inline \
u64 ____##name(__BPF_MAP(x, __BPF_DECL_ARGS, __BPF_V, __VA_ARGS__))
generated by cgit v1.2.3 (git 2.39.0) at 2025-12-27 16:28:19 +0300