X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=lib%2Flibrte_bpf%2Frte_bpf.h;h=69116f36ba8b71424cbf030bebe65ea7e10da2b0;hb=3127f99274b679124658afdbfc49210730c50617;hp=1d6c4a9d22d8cc44ac34a501e76e36fd5a40a427;hpb=5dba93ae5f2dc38a13f373634bd06926716d150a;p=dpdk.git

diff --git a/lib/librte_bpf/rte_bpf.h b/lib/librte_bpf/rte_bpf.h
index 1d6c4a9d22..69116f36ba 100644
--- a/lib/librte_bpf/rte_bpf.h
+++ b/lib/librte_bpf/rte_bpf.h
@@ -6,9 +6,10 @@
 #define _RTE_BPF_H_
 
 /**
- * @file
+ * @file rte_bpf.h
  *
  * RTE BPF support.
+ *
  * librte_bpf provides a framework to load and execute eBPF bytecode
  * inside user-space dpdk based applications.
  * It supports basic set of features from eBPF spec
@@ -31,7 +32,7 @@ enum rte_bpf_arg_type {
 	RTE_BPF_ARG_RAW,        /**< scalar value */
 	RTE_BPF_ARG_PTR = 0x10, /**< pointer to data buffer */
 	RTE_BPF_ARG_PTR_MBUF,   /**< pointer to rte_mbuf */
-	RTE_BPF_ARG_PTR_STACK,
+	RTE_BPF_ARG_RESERVED    /**< reserved for internal use */
 };
 
 /**
@@ -39,7 +40,11 @@ enum rte_bpf_arg_type {
  */
 struct rte_bpf_arg {
 	enum rte_bpf_arg_type type;
-	size_t size;     /**< for pointer types, size of data it points to */
+	/**
+	 * for ptr type - max size of data buffer it points to
+	 * for raw type - the size (in bytes) of the value
+	 */
+	size_t size;
 	size_t buf_size;
 	/**< for mbuf ptr type, max size of rte_mbuf data buffer */
 };
@@ -54,8 +59,7 @@ struct rte_bpf_arg {
  */
 enum rte_bpf_xtype {
 	RTE_BPF_XTYPE_FUNC, /**< function */
-	RTE_BPF_XTYPE_VAR,  /**< variable */
-	RTE_BPF_XTYPE_NUM
+	RTE_BPF_XTYPE_VAR   /**< variable */
 };
 
 /**
@@ -65,10 +69,19 @@ struct rte_bpf_xsym {
 	const char *name;        /**< name */
 	enum rte_bpf_xtype type; /**< type */
 	union {
-		uint64_t (*func)(uint64_t, uint64_t, uint64_t,
+		struct {
+			uint64_t (*val)(uint64_t, uint64_t, uint64_t,
 				uint64_t, uint64_t);
-		void *var;
-	}; /**< value */
+			uint32_t nb_args;
+			struct rte_bpf_arg args[EBPF_FUNC_MAX_ARGS];
+			/**< Function arguments descriptions. */
+			struct rte_bpf_arg ret; /**< function return value. */
+		} func;
+		struct {
+			void *val; /**< actual memory location */
+			struct rte_bpf_arg desc; /**< type, size, etc. */
+		} var; /**< external variable */
+	};
 };
 
 /**
@@ -99,13 +112,14 @@ struct rte_bpf;
  * @param bpf
  *   BPF handle to destroy.
  */
-void rte_bpf_destroy(struct rte_bpf *bpf);
+void
+rte_bpf_destroy(struct rte_bpf *bpf);
 
 /**
  * Create a new eBPF execution context and load given BPF code into it.
  *
  * @param prm
- *  Parameters used to create and initialise the BPF exeution context.
+ *  Parameters used to create and initialise the BPF execution context.
  * @return
  *   BPF handle that is used in future BPF operations,
  *   or NULL on error, with error code set in rte_errno.
@@ -113,14 +127,18 @@ void rte_bpf_destroy(struct rte_bpf *bpf);
  *   - EINVAL - invalid parameter passed to function
  *   - ENOMEM - can't reserve enough memory
  */
-struct rte_bpf *rte_bpf_load(const struct rte_bpf_prm *prm);
+struct rte_bpf *
+rte_bpf_load(const struct rte_bpf_prm *prm);
 
 /**
  * Create a new eBPF execution context and load BPF code from given ELF
  * file into it.
+ * Note that if the function will encounter EBPF_PSEUDO_CALL instruction
+ * that references external symbol, it will treat is as standard BPF_CALL
+ * to the external helper function.
  *
  * @param prm
- *  Parameters used to create and initialise the BPF exeution context.
+ *  Parameters used to create and initialise the BPF execution context.
  * @param fname
  *  Pathname for a ELF file.
  * @param sname
@@ -132,9 +150,9 @@ struct rte_bpf *rte_bpf_load(const struct rte_bpf_prm *prm);
  *   - EINVAL - invalid parameter passed to function
  *   - ENOMEM - can't reserve enough memory
  */
-struct rte_bpf *rte_bpf_elf_load(const struct rte_bpf_prm *prm,
-	const char *fname, const char *sname);
-
+struct rte_bpf *
+rte_bpf_elf_load(const struct rte_bpf_prm *prm, const char *fname,
+		const char *sname);
 /**
  * Execute given BPF bytecode.
  *
@@ -145,7 +163,8 @@ struct rte_bpf *rte_bpf_elf_load(const struct rte_bpf_prm *prm,
  * @return
  *   BPF execution return value.
  */
-uint64_t rte_bpf_exec(const struct rte_bpf *bpf, void *ctx);
+uint64_t
+rte_bpf_exec(const struct rte_bpf *bpf, void *ctx);
 
 /**
  * Execute given BPF bytecode over a set of input contexts.
@@ -161,11 +180,12 @@ uint64_t rte_bpf_exec(const struct rte_bpf *bpf, void *ctx);
  * @return
  *   number of successfully processed inputs.
  */
-uint32_t rte_bpf_exec_burst(const struct rte_bpf *bpf, void *ctx[],
-	uint64_t rc[], uint32_t num);
+uint32_t
+rte_bpf_exec_burst(const struct rte_bpf *bpf, void *ctx[], uint64_t rc[],
+		uint32_t num);
 
 /**
- * Provide information about natively compield code for given BPF handle.
+ * Provide information about natively compiled code for given BPF handle.
  *
  * @param bpf
  *   handle for the BPF code.
@@ -175,7 +195,8 @@ uint32_t rte_bpf_exec_burst(const struct rte_bpf *bpf, void *ctx[],
  *   - -EINVAL if the parameters are invalid.
  *   - Zero if operation completed successfully.
  */
-int rte_bpf_get_jit(const struct rte_bpf *bpf, struct rte_bpf_jit *jit);
+int
+rte_bpf_get_jit(const struct rte_bpf *bpf, struct rte_bpf_jit *jit);
 
 #ifdef __cplusplus
 }