Initial file dump from open source releaseHEADmaster

1 files changed, 147 insertions, 0 deletions

diff --git a/include/linux/filter.h b/include/linux/filter.h
new file mode 100644
index 00000000..f65f5a69
--- /dev/null
+++ b/include/linux/filter.h
@@ -0,0 +1,147 @@
+/*
+ * Linux Socket Filter Data Structures
+ */
+#ifndef __LINUX_FILTER_H__
+#define __LINUX_FILTER_H__
+
+#include <linux/atomic.h>
+#include <linux/compat.h>
+#include <uapi/linux/filter.h>
+
+#ifdef CONFIG_COMPAT
+/*
+ * A struct sock_filter is architecture independent.
+ */
+struct compat_sock_fprog {
+	u16		len;
+	compat_uptr_t	filter;		/* struct sock_filter * */
+};
+#endif
+
+struct sk_buff;
+struct sock;
+
+struct sk_filter
+{
+	atomic_t		refcnt;
+	unsigned int         	len;	/* Number of filter blocks */
+	unsigned int		(*bpf_func)(const struct sk_buff *skb,
+					    const struct sock_filter *filter);
+	struct rcu_head		rcu;
+	struct sock_filter     	insns[0];
+};
+
+static inline unsigned int sk_filter_len(const struct sk_filter *fp)
+{
+	return fp->len * sizeof(struct sock_filter) + sizeof(*fp);
+}
+
+extern int sk_filter(struct sock *sk, struct sk_buff *skb);
+extern unsigned int sk_run_filter(const struct sk_buff *skb,
+				  const struct sock_filter *filter);
+extern int sk_unattached_filter_create(struct sk_filter **pfp,
+				       struct sock_fprog *fprog);
+extern void sk_unattached_filter_destroy(struct sk_filter *fp);
+extern int sk_attach_filter(struct sock_fprog *fprog, struct sock *sk);
+extern int sk_detach_filter(struct sock *sk);
+extern int sk_chk_filter(struct sock_filter *filter, unsigned int flen);
+extern int sk_get_filter(struct sock *sk, struct sock_filter __user *filter, unsigned len);
+extern void sk_decode_filter(struct sock_filter *filt, struct sock_filter *to);
+
+#ifdef CONFIG_BPF_JIT
+#include <stdarg.h>
+#include <linux/linkage.h>
+#include <linux/printk.h>
+
+extern void bpf_jit_compile(struct sk_filter *fp);
+extern void bpf_jit_free(struct sk_filter *fp);
+
+static inline void bpf_jit_dump(unsigned int flen, unsigned int proglen,
+				u32 pass, void *image)
+{
+	pr_err("flen=%u proglen=%u pass=%u image=%p\n",
+	       flen, proglen, pass, image);
+	if (image)
+		print_hex_dump(KERN_ERR, "JIT code: ", DUMP_PREFIX_ADDRESS,
+			       16, 1, image, proglen, false);
+}
+#define SK_RUN_FILTER(FILTER, SKB) (*FILTER->bpf_func)(SKB, FILTER->insns)
+#else
+static inline void bpf_jit_compile(struct sk_filter *fp)
+{
+}
+static inline void bpf_jit_free(struct sk_filter *fp)
+{
+}
+#define SK_RUN_FILTER(FILTER, SKB) sk_run_filter(SKB, FILTER->insns)
+#endif
+
+enum {
+	BPF_S_RET_K = 1,
+	BPF_S_RET_A,
+	BPF_S_ALU_ADD_K,
+	BPF_S_ALU_ADD_X,
+	BPF_S_ALU_SUB_K,
+	BPF_S_ALU_SUB_X,
+	BPF_S_ALU_MUL_K,
+	BPF_S_ALU_MUL_X,
+	BPF_S_ALU_DIV_X,
+	BPF_S_ALU_MOD_K,
+	BPF_S_ALU_MOD_X,
+	BPF_S_ALU_AND_K,
+	BPF_S_ALU_AND_X,
+	BPF_S_ALU_OR_K,
+	BPF_S_ALU_OR_X,
+	BPF_S_ALU_XOR_K,
+	BPF_S_ALU_XOR_X,
+	BPF_S_ALU_LSH_K,
+	BPF_S_ALU_LSH_X,
+	BPF_S_ALU_RSH_K,
+	BPF_S_ALU_RSH_X,
+	BPF_S_ALU_NEG,
+	BPF_S_LD_W_ABS,
+	BPF_S_LD_H_ABS,
+	BPF_S_LD_B_ABS,
+	BPF_S_LD_W_LEN,
+	BPF_S_LD_W_IND,
+	BPF_S_LD_H_IND,
+	BPF_S_LD_B_IND,
+	BPF_S_LD_IMM,
+	BPF_S_LDX_W_LEN,
+	BPF_S_LDX_B_MSH,
+	BPF_S_LDX_IMM,
+	BPF_S_MISC_TAX,
+	BPF_S_MISC_TXA,
+	BPF_S_ALU_DIV_K,
+	BPF_S_LD_MEM,
+	BPF_S_LDX_MEM,
+	BPF_S_ST,
+	BPF_S_STX,
+	BPF_S_JMP_JA,
+	BPF_S_JMP_JEQ_K,
+	BPF_S_JMP_JEQ_X,
+	BPF_S_JMP_JGE_K,
+	BPF_S_JMP_JGE_X,
+	BPF_S_JMP_JGT_K,
+	BPF_S_JMP_JGT_X,
+	BPF_S_JMP_JSET_K,
+	BPF_S_JMP_JSET_X,
+	/* Ancillary data */
+	BPF_S_ANC_PROTOCOL,
+	BPF_S_ANC_PKTTYPE,
+	BPF_S_ANC_IFINDEX,
+	BPF_S_ANC_NLATTR,
+	BPF_S_ANC_NLATTR_NEST,
+	BPF_S_ANC_MARK,
+	BPF_S_ANC_QUEUE,
+	BPF_S_ANC_HATYPE,
+	BPF_S_ANC_RXHASH,
+	BPF_S_ANC_CPU,
+	BPF_S_ANC_ALU_XOR_X,
+	BPF_S_ANC_SECCOMP_LD_W,
+	BPF_S_ANC_VLAN_TAG,
+	BPF_S_ANC_VLAN_TAG_PRESENT,
+	BPF_S_ANC_PAY_OFFSET,
+};
+
+#endif /* __LINUX_FILTER_H__ */