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#ifndef __BPF_EXPERIMENTAL__
#define __BPF_EXPERIMENTAL__
#include <vmlinux.h>
#include <bpf/bpf_tracing.h>
#include <bpf/bpf_helpers.h>
#include <bpf/bpf_core_read.h>
#define __contains(name, node) __attribute__((btf_decl_tag("contains:" #name ":" #node)))
/* Description
* Allocates an object of the type represented by 'local_type_id' in
* program BTF. User may use the bpf_core_type_id_local macro to pass the
* type ID of a struct in program BTF.
*
* The 'local_type_id' parameter must be a known constant.
* The 'meta' parameter is rewritten by the verifier, no need for BPF
* program to set it.
* Returns
* A pointer to an object of the type corresponding to the passed in
* 'local_type_id', or NULL on failure.
*/
extern void *bpf_obj_new_impl(__u64 local_type_id, void *meta) __ksym;
/* Convenience macro to wrap over bpf_obj_new_impl */
#define bpf_obj_new(type) ((type *)bpf_obj_new_impl(bpf_core_type_id_local(type), NULL))
/* Description
* Free an allocated object. All fields of the object that require
* destruction will be destructed before the storage is freed.
*
* The 'meta' parameter is rewritten by the verifier, no need for BPF
* program to set it.
* Returns
* Void.
*/
extern void bpf_obj_drop_impl(void *kptr, void *meta) __ksym;
/* Convenience macro to wrap over bpf_obj_drop_impl */
#define bpf_obj_drop(kptr) bpf_obj_drop_impl(kptr, NULL)
/* Description
* Increment the refcount on a refcounted local kptr, turning the
* non-owning reference input into an owning reference in the process.
*
* The 'meta' parameter is rewritten by the verifier, no need for BPF
* program to set it.
* Returns
* An owning reference to the object pointed to by 'kptr'
*/
extern void *bpf_refcount_acquire_impl(void *kptr, void *meta) __ksym;
/* Convenience macro to wrap over bpf_refcount_acquire_impl */
#define bpf_refcount_acquire(kptr) bpf_refcount_acquire_impl(kptr, NULL)
/* Description
* Add a new entry to the beginning of the BPF linked list.
*
* The 'meta' and 'off' parameters are rewritten by the verifier, no need
* for BPF programs to set them
* Returns
* 0 if the node was successfully added
* -EINVAL if the node wasn't added because it's already in a list
*/
extern int bpf_list_push_front_impl(struct bpf_list_head *head,
struct bpf_list_node *node,
void *meta, __u64 off) __ksym;
/* Convenience macro to wrap over bpf_list_push_front_impl */
#define bpf_list_push_front(head, node) bpf_list_push_front_impl(head, node, NULL, 0)
/* Description
* Add a new entry to the end of the BPF linked list.
*
* The 'meta' and 'off' parameters are rewritten by the verifier, no need
* for BPF programs to set them
* Returns
* 0 if the node was successfully added
* -EINVAL if the node wasn't added because it's already in a list
*/
extern int bpf_list_push_back_impl(struct bpf_list_head *head,
struct bpf_list_node *node,
void *meta, __u64 off) __ksym;
/* Convenience macro to wrap over bpf_list_push_back_impl */
#define bpf_list_push_back(head, node) bpf_list_push_back_impl(head, node, NULL, 0)
/* Description
* Remove the entry at the beginning of the BPF linked list.
* Returns
* Pointer to bpf_list_node of deleted entry, or NULL if list is empty.
*/
extern struct bpf_list_node *bpf_list_pop_front(struct bpf_list_head *head) __ksym;
/* Description
* Remove the entry at the end of the BPF linked list.
* Returns
* Pointer to bpf_list_node of deleted entry, or NULL if list is empty.
*/
extern struct bpf_list_node *bpf_list_pop_back(struct bpf_list_head *head) __ksym;
/* Description
* Remove 'node' from rbtree with root 'root'
* Returns
* Pointer to the removed node, or NULL if 'root' didn't contain 'node'
*/
extern struct bpf_rb_node *bpf_rbtree_remove(struct bpf_rb_root *root,
struct bpf_rb_node *node) __ksym;
/* Description
* Add 'node' to rbtree with root 'root' using comparator 'less'
*
* The 'meta' and 'off' parameters are rewritten by the verifier, no need
* for BPF programs to set them
* Returns
* 0 if the node was successfully added
* -EINVAL if the node wasn't added because it's already in a tree
*/
extern int bpf_rbtree_add_impl(struct bpf_rb_root *root, struct bpf_rb_node *node,
bool (less)(struct bpf_rb_node *a, const struct bpf_rb_node *b),
void *meta, __u64 off) __ksym;
/* Convenience macro to wrap over bpf_rbtree_add_impl */
#define bpf_rbtree_add(head, node, less) bpf_rbtree_add_impl(head, node, less, NULL, 0)
/* Description
* Return the first (leftmost) node in input tree
* Returns
* Pointer to the node, which is _not_ removed from the tree. If the tree
* contains no nodes, returns NULL.
*/
extern struct bpf_rb_node *bpf_rbtree_first(struct bpf_rb_root *root) __ksym;
/* Description
* Allocates a percpu object of the type represented by 'local_type_id' in
* program BTF. User may use the bpf_core_type_id_local macro to pass the
* type ID of a struct in program BTF.
*
* The 'local_type_id' parameter must be a known constant.
* The 'meta' parameter is rewritten by the verifier, no need for BPF
* program to set it.
* Returns
* A pointer to a percpu object of the type corresponding to the passed in
* 'local_type_id', or NULL on failure.
*/
extern void *bpf_percpu_obj_new_impl(__u64 local_type_id, void *meta) __ksym;
/* Convenience macro to wrap over bpf_percpu_obj_new_impl */
#define bpf_percpu_obj_new(type) ((type __percpu_kptr *)bpf_percpu_obj_new_impl(bpf_core_type_id_local(type), NULL))
/* Description
* Free an allocated percpu object. All fields of the object that require
* destruction will be destructed before the storage is freed.
*
* The 'meta' parameter is rewritten by the verifier, no need for BPF
* program to set it.
* Returns
* Void.
*/
extern void bpf_percpu_obj_drop_impl(void *kptr, void *meta) __ksym;
/* Convenience macro to wrap over bpf_obj_drop_impl */
#define bpf_percpu_obj_drop(kptr) bpf_percpu_obj_drop_impl(kptr, NULL)
/* Description
* Throw a BPF exception from the program, immediately terminating its
* execution and unwinding the stack. The supplied 'cookie' parameter
* will be the return value of the program when an exception is thrown,
* and the default exception callback is used. Otherwise, if an exception
* callback is set using the '__exception_cb(callback)' declaration tag
* on the main program, the 'cookie' parameter will be the callback's only
* input argument.
*
* Thus, in case of default exception callback, 'cookie' is subjected to
* constraints on the program's return value (as with R0 on exit).
* Otherwise, the return value of the marked exception callback will be
* subjected to the same checks.
*
* Note that throwing an exception with lingering resources (locks,
* references, etc.) will lead to a verification error.
*
* Note that callbacks *cannot* call this helper.
* Returns
* Never.
* Throws
* An exception with the specified 'cookie' value.
*/
extern void bpf_throw(u64 cookie) __ksym;
/* This macro must be used to mark the exception callback corresponding to the
* main program. For example:
*
* int exception_cb(u64 cookie) {
* return cookie;
* }
*
* SEC("tc")
* __exception_cb(exception_cb)
* int main_prog(struct __sk_buff *ctx) {
* ...
* return TC_ACT_OK;
* }
*
* Here, exception callback for the main program will be 'exception_cb'. Note
* that this attribute can only be used once, and multiple exception callbacks
* specified for the main program will lead to verification error.
*/
#define __exception_cb(name) __attribute__((btf_decl_tag("exception_callback:" #name)))
#endif
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