From patchwork Sun Oct 6 05:43:48 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrii Nakryiko X-Patchwork-Id: 1172344 X-Patchwork-Delegate: bpf@iogearbox.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=fb.com Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=fb.com header.i=@fb.com header.b="ClguIU76"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 46mCGV6Nbyz9sCJ for ; Sun, 6 Oct 2019 16:44:02 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726215AbfJFFoC (ORCPT ); Sun, 6 Oct 2019 01:44:02 -0400 Received: from mx0a-00082601.pphosted.com ([67.231.145.42]:43036 "EHLO mx0a-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726080AbfJFFoB (ORCPT ); Sun, 6 Oct 2019 01:44:01 -0400 Received: from pps.filterd (m0148461.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id x965hQPQ028698 for ; Sat, 5 Oct 2019 22:44:00 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fb.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type; s=facebook; bh=mXZaDbpWnMwPftxowO69SVcC0IStzLOuYnUNof4o4uc=; b=ClguIU764mFIAbL0jCZXU21PtjReoIJ3o6NXJvVYaxSfTNhohPB9a3HBR1ny1Hm+jlCh T/aglQwsq7SwjH98vpItIBHxHwV8pD7sMvY2vR1KXZUM4jrl+w283c8KHi+PKhOH9ate tGcX0RHAqTbLmYiWL2wqnS4vnIzT7C3QGZU= Received: from maileast.thefacebook.com ([163.114.130.16]) by mx0a-00082601.pphosted.com with ESMTP id 2ver9hb9an-2 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Sat, 05 Oct 2019 22:43:59 -0700 Received: from 2401:db00:12:9028:face:0:29:0 (2620:10d:c0a8:1b::d) by mail.thefacebook.com (2620:10d:c0a8:83::6) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1713.5; Sat, 5 Oct 2019 22:43:58 -0700 Received: by dev101.prn2.facebook.com (Postfix, from userid 137359) id C7C958618A5; Sat, 5 Oct 2019 22:43:56 -0700 (PDT) Smtp-Origin-Hostprefix: dev From: Andrii Nakryiko Smtp-Origin-Hostname: dev101.prn2.facebook.com To: , , , , CC: , , Andrii Nakryiko Smtp-Origin-Cluster: prn2c23 Subject: [PATCH v3 bpf-next 1/3] uapi/bpf: fix helper docs Date: Sat, 5 Oct 2019 22:43:48 -0700 Message-ID: <20191006054350.3014517-2-andriin@fb.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191006054350.3014517-1-andriin@fb.com> References: <20191006054350.3014517-1-andriin@fb.com> X-FB-Internal: Safe MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.95,1.0.8 definitions=2019-10-06_02:2019-10-03,2019-10-06 signatures=0 X-Proofpoint-Spam-Details: rule=fb_default_notspam policy=fb_default score=0 lowpriorityscore=0 phishscore=0 impostorscore=0 clxscore=1015 adultscore=0 priorityscore=1501 spamscore=0 malwarescore=0 mlxscore=0 mlxlogscore=999 bulkscore=0 suspectscore=8 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-1908290000 definitions=main-1910060059 X-FB-Internal: deliver Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Various small fixes to BPF helper documentation comments, enabling automatic header generation with a list of BPF helpers. Signed-off-by: Andrii Nakryiko --- include/uapi/linux/bpf.h | 32 ++++++++++++++++---------------- tools/include/uapi/linux/bpf.h | 32 ++++++++++++++++---------------- 2 files changed, 32 insertions(+), 32 deletions(-) diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h index 77c6be96d676..a65c3b0c6935 100644 --- a/include/uapi/linux/bpf.h +++ b/include/uapi/linux/bpf.h @@ -794,7 +794,7 @@ union bpf_attr { * A 64-bit integer containing the current GID and UID, and * created as such: *current_gid* **<< 32 \|** *current_uid*. * - * int bpf_get_current_comm(char *buf, u32 size_of_buf) + * int bpf_get_current_comm(void *buf, u32 size_of_buf) * Description * Copy the **comm** attribute of the current task into *buf* of * *size_of_buf*. The **comm** attribute contains the name of @@ -1023,7 +1023,7 @@ union bpf_attr { * The realm of the route for the packet associated to *skb*, or 0 * if none was found. * - * int bpf_perf_event_output(struct pt_regs *ctx, struct bpf_map *map, u64 flags, void *data, u64 size) + * int bpf_perf_event_output(void *ctx, struct bpf_map *map, u64 flags, void *data, u64 size) * Description * Write raw *data* blob into a special BPF perf event held by * *map* of type **BPF_MAP_TYPE_PERF_EVENT_ARRAY**. This perf @@ -1068,7 +1068,7 @@ union bpf_attr { * Return * 0 on success, or a negative error in case of failure. * - * int bpf_skb_load_bytes(const struct sk_buff *skb, u32 offset, void *to, u32 len) + * int bpf_skb_load_bytes(const void *skb, u32 offset, void *to, u32 len) * Description * This helper was provided as an easy way to load data from a * packet. It can be used to load *len* bytes from *offset* from @@ -1085,7 +1085,7 @@ union bpf_attr { * Return * 0 on success, or a negative error in case of failure. * - * int bpf_get_stackid(struct pt_regs *ctx, struct bpf_map *map, u64 flags) + * int bpf_get_stackid(void *ctx, struct bpf_map *map, u64 flags) * Description * Walk a user or a kernel stack and return its id. To achieve * this, the helper needs *ctx*, which is a pointer to the context @@ -1154,7 +1154,7 @@ union bpf_attr { * The checksum result, or a negative error code in case of * failure. * - * int bpf_skb_get_tunnel_opt(struct sk_buff *skb, u8 *opt, u32 size) + * int bpf_skb_get_tunnel_opt(struct sk_buff *skb, void *opt, u32 size) * Description * Retrieve tunnel options metadata for the packet associated to * *skb*, and store the raw tunnel option data to the buffer *opt* @@ -1172,7 +1172,7 @@ union bpf_attr { * Return * The size of the option data retrieved. * - * int bpf_skb_set_tunnel_opt(struct sk_buff *skb, u8 *opt, u32 size) + * int bpf_skb_set_tunnel_opt(struct sk_buff *skb, void *opt, u32 size) * Description * Set tunnel options metadata for the packet associated to *skb* * to the option data contained in the raw buffer *opt* of *size*. @@ -1511,7 +1511,7 @@ union bpf_attr { * Return * 0 * - * int bpf_setsockopt(struct bpf_sock_ops *bpf_socket, int level, int optname, char *optval, int optlen) + * int bpf_setsockopt(struct bpf_sock_ops *bpf_socket, int level, int optname, void *optval, int optlen) * Description * Emulate a call to **setsockopt()** on the socket associated to * *bpf_socket*, which must be a full socket. The *level* at @@ -1595,7 +1595,7 @@ union bpf_attr { * Return * **XDP_REDIRECT** on success, or **XDP_ABORTED** on error. * - * int bpf_sk_redirect_map(struct bpf_map *map, u32 key, u64 flags) + * int bpf_sk_redirect_map(struct sk_buff *skb, struct bpf_map *map, u32 key, u64 flags) * Description * Redirect the packet to the socket referenced by *map* (of type * **BPF_MAP_TYPE_SOCKMAP**) at index *key*. Both ingress and @@ -1715,7 +1715,7 @@ union bpf_attr { * Return * 0 on success, or a negative error in case of failure. * - * int bpf_getsockopt(struct bpf_sock_ops *bpf_socket, int level, int optname, char *optval, int optlen) + * int bpf_getsockopt(struct bpf_sock_ops *bpf_socket, int level, int optname, void *optval, int optlen) * Description * Emulate a call to **getsockopt()** on the socket associated to * *bpf_socket*, which must be a full socket. The *level* at @@ -1947,7 +1947,7 @@ union bpf_attr { * Return * 0 on success, or a negative error in case of failure. * - * int bpf_get_stack(struct pt_regs *regs, void *buf, u32 size, u64 flags) + * int bpf_get_stack(void *ctx, void *buf, u32 size, u64 flags) * Description * Return a user or a kernel stack in bpf program provided buffer. * To achieve this, the helper needs *ctx*, which is a pointer @@ -1980,7 +1980,7 @@ union bpf_attr { * A non-negative value equal to or less than *size* on success, * or a negative error in case of failure. * - * int bpf_skb_load_bytes_relative(const struct sk_buff *skb, u32 offset, void *to, u32 len, u32 start_header) + * int bpf_skb_load_bytes_relative(const void *skb, u32 offset, void *to, u32 len, u32 start_header) * Description * This helper is similar to **bpf_skb_load_bytes**\ () in that * it provides an easy way to load *len* bytes from *offset* @@ -2033,7 +2033,7 @@ union bpf_attr { * * > 0 one of **BPF_FIB_LKUP_RET_** codes explaining why the * packet is not forwarded or needs assist from full stack * - * int bpf_sock_hash_update(struct bpf_sock_ops_kern *skops, struct bpf_map *map, void *key, u64 flags) + * int bpf_sock_hash_update(struct bpf_sock_ops *skops, struct bpf_map *map, void *key, u64 flags) * Description * Add an entry to, or update a sockhash *map* referencing sockets. * The *skops* is used as a new value for the entry associated to @@ -2392,7 +2392,7 @@ union bpf_attr { * Return * 0 on success, or a negative error in case of failure. * - * int bpf_msg_push_data(struct sk_buff *skb, u32 start, u32 len, u64 flags) + * int bpf_msg_push_data(struct sk_msg_buff *msg, u32 start, u32 len, u64 flags) * Description * For socket policies, insert *len* bytes into *msg* at offset * *start*. @@ -2408,9 +2408,9 @@ union bpf_attr { * Return * 0 on success, or a negative error in case of failure. * - * int bpf_msg_pop_data(struct sk_msg_buff *msg, u32 start, u32 pop, u64 flags) + * int bpf_msg_pop_data(struct sk_msg_buff *msg, u32 start, u32 len, u64 flags) * Description - * Will remove *pop* bytes from a *msg* starting at byte *start*. + * Will remove *len* bytes from a *msg* starting at byte *start*. * This may result in **ENOMEM** errors under certain situations if * an allocation and copy are required due to a full ring buffer. * However, the helper will try to avoid doing the allocation @@ -2505,7 +2505,7 @@ union bpf_attr { * A **struct bpf_tcp_sock** pointer on success, or **NULL** in * case of failure. * - * int bpf_skb_ecn_set_ce(struct sk_buf *skb) + * int bpf_skb_ecn_set_ce(struct sk_buff *skb) * Description * Set ECN (Explicit Congestion Notification) field of IP header * to **CE** (Congestion Encountered) if current value is **ECT** diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h index 77c6be96d676..a65c3b0c6935 100644 --- a/tools/include/uapi/linux/bpf.h +++ b/tools/include/uapi/linux/bpf.h @@ -794,7 +794,7 @@ union bpf_attr { * A 64-bit integer containing the current GID and UID, and * created as such: *current_gid* **<< 32 \|** *current_uid*. * - * int bpf_get_current_comm(char *buf, u32 size_of_buf) + * int bpf_get_current_comm(void *buf, u32 size_of_buf) * Description * Copy the **comm** attribute of the current task into *buf* of * *size_of_buf*. The **comm** attribute contains the name of @@ -1023,7 +1023,7 @@ union bpf_attr { * The realm of the route for the packet associated to *skb*, or 0 * if none was found. * - * int bpf_perf_event_output(struct pt_regs *ctx, struct bpf_map *map, u64 flags, void *data, u64 size) + * int bpf_perf_event_output(void *ctx, struct bpf_map *map, u64 flags, void *data, u64 size) * Description * Write raw *data* blob into a special BPF perf event held by * *map* of type **BPF_MAP_TYPE_PERF_EVENT_ARRAY**. This perf @@ -1068,7 +1068,7 @@ union bpf_attr { * Return * 0 on success, or a negative error in case of failure. * - * int bpf_skb_load_bytes(const struct sk_buff *skb, u32 offset, void *to, u32 len) + * int bpf_skb_load_bytes(const void *skb, u32 offset, void *to, u32 len) * Description * This helper was provided as an easy way to load data from a * packet. It can be used to load *len* bytes from *offset* from @@ -1085,7 +1085,7 @@ union bpf_attr { * Return * 0 on success, or a negative error in case of failure. * - * int bpf_get_stackid(struct pt_regs *ctx, struct bpf_map *map, u64 flags) + * int bpf_get_stackid(void *ctx, struct bpf_map *map, u64 flags) * Description * Walk a user or a kernel stack and return its id. To achieve * this, the helper needs *ctx*, which is a pointer to the context @@ -1154,7 +1154,7 @@ union bpf_attr { * The checksum result, or a negative error code in case of * failure. * - * int bpf_skb_get_tunnel_opt(struct sk_buff *skb, u8 *opt, u32 size) + * int bpf_skb_get_tunnel_opt(struct sk_buff *skb, void *opt, u32 size) * Description * Retrieve tunnel options metadata for the packet associated to * *skb*, and store the raw tunnel option data to the buffer *opt* @@ -1172,7 +1172,7 @@ union bpf_attr { * Return * The size of the option data retrieved. * - * int bpf_skb_set_tunnel_opt(struct sk_buff *skb, u8 *opt, u32 size) + * int bpf_skb_set_tunnel_opt(struct sk_buff *skb, void *opt, u32 size) * Description * Set tunnel options metadata for the packet associated to *skb* * to the option data contained in the raw buffer *opt* of *size*. @@ -1511,7 +1511,7 @@ union bpf_attr { * Return * 0 * - * int bpf_setsockopt(struct bpf_sock_ops *bpf_socket, int level, int optname, char *optval, int optlen) + * int bpf_setsockopt(struct bpf_sock_ops *bpf_socket, int level, int optname, void *optval, int optlen) * Description * Emulate a call to **setsockopt()** on the socket associated to * *bpf_socket*, which must be a full socket. The *level* at @@ -1595,7 +1595,7 @@ union bpf_attr { * Return * **XDP_REDIRECT** on success, or **XDP_ABORTED** on error. * - * int bpf_sk_redirect_map(struct bpf_map *map, u32 key, u64 flags) + * int bpf_sk_redirect_map(struct sk_buff *skb, struct bpf_map *map, u32 key, u64 flags) * Description * Redirect the packet to the socket referenced by *map* (of type * **BPF_MAP_TYPE_SOCKMAP**) at index *key*. Both ingress and @@ -1715,7 +1715,7 @@ union bpf_attr { * Return * 0 on success, or a negative error in case of failure. * - * int bpf_getsockopt(struct bpf_sock_ops *bpf_socket, int level, int optname, char *optval, int optlen) + * int bpf_getsockopt(struct bpf_sock_ops *bpf_socket, int level, int optname, void *optval, int optlen) * Description * Emulate a call to **getsockopt()** on the socket associated to * *bpf_socket*, which must be a full socket. The *level* at @@ -1947,7 +1947,7 @@ union bpf_attr { * Return * 0 on success, or a negative error in case of failure. * - * int bpf_get_stack(struct pt_regs *regs, void *buf, u32 size, u64 flags) + * int bpf_get_stack(void *ctx, void *buf, u32 size, u64 flags) * Description * Return a user or a kernel stack in bpf program provided buffer. * To achieve this, the helper needs *ctx*, which is a pointer @@ -1980,7 +1980,7 @@ union bpf_attr { * A non-negative value equal to or less than *size* on success, * or a negative error in case of failure. * - * int bpf_skb_load_bytes_relative(const struct sk_buff *skb, u32 offset, void *to, u32 len, u32 start_header) + * int bpf_skb_load_bytes_relative(const void *skb, u32 offset, void *to, u32 len, u32 start_header) * Description * This helper is similar to **bpf_skb_load_bytes**\ () in that * it provides an easy way to load *len* bytes from *offset* @@ -2033,7 +2033,7 @@ union bpf_attr { * * > 0 one of **BPF_FIB_LKUP_RET_** codes explaining why the * packet is not forwarded or needs assist from full stack * - * int bpf_sock_hash_update(struct bpf_sock_ops_kern *skops, struct bpf_map *map, void *key, u64 flags) + * int bpf_sock_hash_update(struct bpf_sock_ops *skops, struct bpf_map *map, void *key, u64 flags) * Description * Add an entry to, or update a sockhash *map* referencing sockets. * The *skops* is used as a new value for the entry associated to @@ -2392,7 +2392,7 @@ union bpf_attr { * Return * 0 on success, or a negative error in case of failure. * - * int bpf_msg_push_data(struct sk_buff *skb, u32 start, u32 len, u64 flags) + * int bpf_msg_push_data(struct sk_msg_buff *msg, u32 start, u32 len, u64 flags) * Description * For socket policies, insert *len* bytes into *msg* at offset * *start*. @@ -2408,9 +2408,9 @@ union bpf_attr { * Return * 0 on success, or a negative error in case of failure. * - * int bpf_msg_pop_data(struct sk_msg_buff *msg, u32 start, u32 pop, u64 flags) + * int bpf_msg_pop_data(struct sk_msg_buff *msg, u32 start, u32 len, u64 flags) * Description - * Will remove *pop* bytes from a *msg* starting at byte *start*. + * Will remove *len* bytes from a *msg* starting at byte *start*. * This may result in **ENOMEM** errors under certain situations if * an allocation and copy are required due to a full ring buffer. * However, the helper will try to avoid doing the allocation @@ -2505,7 +2505,7 @@ union bpf_attr { * A **struct bpf_tcp_sock** pointer on success, or **NULL** in * case of failure. * - * int bpf_skb_ecn_set_ce(struct sk_buf *skb) + * int bpf_skb_ecn_set_ce(struct sk_buff *skb) * Description * Set ECN (Explicit Congestion Notification) field of IP header * to **CE** (Congestion Encountered) if current value is **ECT** From patchwork Sun Oct 6 05:43:49 2019 Content-Type: text/plain; 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Sat, 5 Oct 2019 22:44:00 -0700 Received: by dev101.prn2.facebook.com (Postfix, from userid 137359) id 8EB8A8618A5; Sat, 5 Oct 2019 22:43:58 -0700 (PDT) Smtp-Origin-Hostprefix: dev From: Andrii Nakryiko Smtp-Origin-Hostname: dev101.prn2.facebook.com To: , , , , CC: , , Andrii Nakryiko Smtp-Origin-Cluster: prn2c23 Subject: [PATCH v3 bpf-next 2/3] scripts/bpf: teach bpf_helpers_doc.py to dump BPF helper definitions Date: Sat, 5 Oct 2019 22:43:49 -0700 Message-ID: <20191006054350.3014517-3-andriin@fb.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191006054350.3014517-1-andriin@fb.com> References: <20191006054350.3014517-1-andriin@fb.com> X-FB-Internal: Safe MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.95,1.0.8 definitions=2019-10-06_02:2019-10-03,2019-10-06 signatures=0 X-Proofpoint-Spam-Details: rule=fb_default_notspam policy=fb_default score=0 phishscore=0 suspectscore=9 clxscore=1015 impostorscore=0 priorityscore=1501 lowpriorityscore=0 malwarescore=0 spamscore=0 adultscore=0 bulkscore=0 mlxscore=0 mlxlogscore=385 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-1908290000 definitions=main-1910060059 X-FB-Internal: deliver Sender: bpf-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org Enhance scripts/bpf_helpers_doc.py to emit C header with BPF helper definitions (to be included from libbpf's bpf_helpers.h). Signed-off-by: Andrii Nakryiko --- scripts/bpf_helpers_doc.py | 155 ++++++++++++++++++++++++++++++++++++- 1 file changed, 154 insertions(+), 1 deletion(-) diff --git a/scripts/bpf_helpers_doc.py b/scripts/bpf_helpers_doc.py index 894cc58c1a03..15d3d83d6297 100755 --- a/scripts/bpf_helpers_doc.py +++ b/scripts/bpf_helpers_doc.py @@ -391,6 +391,154 @@ SEE ALSO print('') +class PrinterHelpers(Printer): + """ + A printer for dumping collected information about helpers as C header to + be included from BPF program. + @helpers: array of Helper objects to print to standard output + """ + + type_fwds = [ + 'struct bpf_fib_lookup', + 'struct bpf_perf_event_data', + 'struct bpf_perf_event_value', + 'struct bpf_sock', + 'struct bpf_sock_addr', + 'struct bpf_sock_ops', + 'struct bpf_sock_tuple', + 'struct bpf_spin_lock', + 'struct bpf_sysctl', + 'struct bpf_tcp_sock', + 'struct bpf_tunnel_key', + 'struct bpf_xfrm_state', + 'struct pt_regs', + 'struct sk_reuseport_md', + 'struct sockaddr', + 'struct tcphdr', + + 'struct __sk_buff', + 'struct sk_msg_md', + 'struct xpd_md', + ] + known_types = { + '...', + 'void', + 'const void', + 'char', + 'const char', + 'int', + 'long', + 'unsigned long', + + '__be16', + '__be32', + '__wsum', + + 'struct bpf_fib_lookup', + 'struct bpf_perf_event_data', + 'struct bpf_perf_event_value', + 'struct bpf_sock', + 'struct bpf_sock_addr', + 'struct bpf_sock_ops', + 'struct bpf_sock_tuple', + 'struct bpf_spin_lock', + 'struct bpf_sysctl', + 'struct bpf_tcp_sock', + 'struct bpf_tunnel_key', + 'struct bpf_xfrm_state', + 'struct pt_regs', + 'struct sk_reuseport_md', + 'struct sockaddr', + 'struct tcphdr', + } + mapped_types = { + 'u8': '__u8', + 'u16': '__u16', + 'u32': '__u32', + 'u64': '__u64', + 's8': '__s8', + 's16': '__s16', + 's32': '__s32', + 's64': '__s64', + 'size_t': 'unsigned long', + 'struct bpf_map': 'void', + 'struct sk_buff': 'struct __sk_buff', + 'const struct sk_buff': 'const struct __sk_buff', + 'struct sk_msg_buff': 'struct sk_msg_md', + 'struct xdp_buff': 'struct xdp_md', + } + + def print_header(self): + header = '''\ +/* This is auto-generated file. See bpf_helpers_doc.py for details. */ + +/* Forward declarations of BPF structs */''' + + print(header) + for fwd in self.type_fwds: + print('%s;' % fwd) + print('') + + def print_footer(self): + footer = '' + print(footer) + + def map_type(self, t): + if t in self.known_types: + return t + if t in self.mapped_types: + return self.mapped_types[t] + print("") + print("Unrecognized type '%s', please add it to known types!" % t) + sys.exit(1) + + seen_helpers = set() + + def print_one(self, helper): + proto = helper.proto_break_down() + + if proto['name'] in self.seen_helpers: + return + self.seen_helpers.add(proto['name']) + + print('/*') + print(" * %s" % proto['name']) + print(" *") + if (helper.desc): + # Do not strip all newline characters: formatted code at the end of + # a section must be followed by a blank line. + for line in re.sub('\n$', '', helper.desc, count=1).split('\n'): + print(' *{}{}'.format(' \t' if line else '', line)) + + if (helper.ret): + print(' *') + print(' * Returns') + for line in helper.ret.rstrip().split('\n'): + print(' *{}{}'.format(' \t' if line else '', line)) + + print(' */') + print('static %s %s(*%s)(' % (self.map_type(proto['ret_type']), + proto['ret_star'], proto['name']), end='') + comma = '' + for i, a in enumerate(proto['args']): + t = a['type'] + n = a['name'] + if proto['name'] == 'bpf_get_socket_cookie' and i == 0: + t = 'void' + n = 'ctx' + one_arg = '{}{}'.format(comma, self.map_type(t)) + if n: + if a['star']: + one_arg += ' {}'.format(a['star']) + else: + one_arg += ' ' + one_arg += '{}'.format(n) + comma = ', ' + print(one_arg, end='') + + print(') = (void *) %d;' % len(self.seen_helpers)) + print('') + ############################################################################### # If script is launched from scripts/ from kernel tree and can access @@ -405,6 +553,8 @@ Parse eBPF header file and generate documentation for eBPF helper functions. The RST-formatted output produced can be turned into a manual page with the rst2man utility. """) +argParser.add_argument('--header', action='store_true', + help='generate C header file') if (os.path.isfile(bpfh)): argParser.add_argument('--filename', help='path to include/uapi/linux/bpf.h', default=bpfh) @@ -417,5 +567,8 @@ headerParser = HeaderParser(args.filename) headerParser.run() # Print formatted output to standard output. -printer = PrinterRST(headerParser.helpers) +if args.header: + printer = PrinterHelpers(headerParser.helpers) +else: + printer = PrinterRST(headerParser.helpers) printer.print_all() From patchwork Sun Oct 6 05:43:50 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrii Nakryiko X-Patchwork-Id: 1172345 X-Patchwork-Delegate: bpf@iogearbox.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=fb.com Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=fb.com header.i=@fb.com header.b="FVqsghhh"; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 46mCGq51vHz9sCJ for ; Sun, 6 Oct 2019 16:44:19 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726177AbfJFFoS (ORCPT ); Sun, 6 Oct 2019 01:44:18 -0400 Received: from mx0b-00082601.pphosted.com ([67.231.153.30]:17268 "EHLO mx0a-00082601.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726097AbfJFFoS (ORCPT ); Sun, 6 Oct 2019 01:44:18 -0400 Received: from pps.filterd (m0089730.ppops.net [127.0.0.1]) by m0089730.ppops.net (8.16.0.42/8.16.0.42) with SMTP id x965iFfx011986 for ; Sat, 5 Oct 2019 22:44:16 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fb.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type; s=facebook; bh=rKEaLORJBEiBk/gMfF3Y1WAMOozjn31EO5yGXj2/ZqE=; b=FVqsghhhJp4uTkKUMGAUqdPchx1tnNVEqp3lxBOgRkC+SmN75xXz3L0z5R4iAJZYqK0w j08Wjkg6IKy7hkYJMKpKV13cFY3Av1epOwKGvoSF+S7Yq1iy+nNaywtys44IIGxj89Hd sbaKdOO2l15w0VoK0s49Cw2y7DAmpXlsDjo= Received: from mail.thefacebook.com (mailout.thefacebook.com [199.201.64.23]) by m0089730.ppops.net with ESMTP id 2vepp1kerq-3 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-SHA384 bits=256 verify=NOT) for ; Sat, 05 Oct 2019 22:44:16 -0700 Received: from 2401:db00:30:600c:face:0:39:0 (2620:10d:c081:10::13) by mail.thefacebook.com (2620:10d:c081:35::130) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA) id 15.1.1713.5; Sat, 5 Oct 2019 22:44:09 -0700 Received: by dev101.prn2.facebook.com (Postfix, from userid 137359) id B59E58618A5; Sat, 5 Oct 2019 22:44:01 -0700 (PDT) Smtp-Origin-Hostprefix: dev From: Andrii Nakryiko Smtp-Origin-Hostname: dev101.prn2.facebook.com To: , , , , CC: , , Andrii Nakryiko Smtp-Origin-Cluster: prn2c23 Subject: [PATCH v3 bpf-next 3/3] libbpf: auto-generate list of BPF helper definitions Date: Sat, 5 Oct 2019 22:43:50 -0700 Message-ID: <20191006054350.3014517-4-andriin@fb.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191006054350.3014517-1-andriin@fb.com> References: <20191006054350.3014517-1-andriin@fb.com> X-FB-Internal: Safe MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.95,1.0.8 definitions=2019-10-06_02:2019-10-03,2019-10-06 signatures=0 X-Proofpoint-Spam-Details: rule=fb_default_notspam policy=fb_default score=0 malwarescore=0 clxscore=1015 suspectscore=9 bulkscore=0 adultscore=0 mlxlogscore=999 lowpriorityscore=0 spamscore=0 mlxscore=0 phishscore=0 impostorscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-1908290000 definitions=main-1910060059 X-FB-Internal: deliver Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Get rid of list of BPF helpers in bpf_helpers.h (irony...) and auto-generate it into bpf_helpers_defs.h, which is now included from bpf_helpers.h. Suggested-by: Alexei Starovoitov Signed-off-by: Andrii Nakryiko --- tools/lib/bpf/.gitignore | 1 + tools/lib/bpf/Makefile | 10 +- tools/lib/bpf/bpf_helpers.h | 264 +----------------------------------- 3 files changed, 10 insertions(+), 265 deletions(-) diff --git a/tools/lib/bpf/.gitignore b/tools/lib/bpf/.gitignore index 12382b0c71c7..35bf013e368c 100644 --- a/tools/lib/bpf/.gitignore +++ b/tools/lib/bpf/.gitignore @@ -6,3 +6,4 @@ libbpf.so.* TAGS tags cscope.* +/bpf_helper_defs.h diff --git a/tools/lib/bpf/Makefile b/tools/lib/bpf/Makefile index e7e346a5dda7..086147fc4659 100644 --- a/tools/lib/bpf/Makefile +++ b/tools/lib/bpf/Makefile @@ -157,7 +157,7 @@ all: fixdep all_cmd: $(CMD_TARGETS) check -$(BPF_IN): force elfdep bpfdep +$(BPF_IN): force elfdep bpfdep bpf_helper_defs.h @(test -f ../../include/uapi/linux/bpf.h -a -f ../../../include/uapi/linux/bpf.h && ( \ (diff -B ../../include/uapi/linux/bpf.h ../../../include/uapi/linux/bpf.h >/dev/null) || \ echo "Warning: Kernel ABI header at 'tools/include/uapi/linux/bpf.h' differs from latest version at 'include/uapi/linux/bpf.h'" >&2 )) || true @@ -175,6 +175,9 @@ $(BPF_IN): force elfdep bpfdep echo "Warning: Kernel ABI header at 'tools/include/uapi/linux/if_xdp.h' differs from latest version at 'include/uapi/linux/if_xdp.h'" >&2 )) || true $(Q)$(MAKE) $(build)=libbpf +bpf_helper_defs.h: $(srctree)/include/uapi/linux/bpf.h + $(srctree)/scripts/bpf_helpers_doc.py --header --file $(srctree)/include/uapi/linux/bpf.h > bpf_helper_defs.h + $(OUTPUT)libbpf.so: $(OUTPUT)libbpf.so.$(LIBBPF_VERSION) $(OUTPUT)libbpf.so.$(LIBBPF_VERSION): $(BPF_IN) @@ -236,7 +239,7 @@ install_lib: all_cmd $(call do_install_mkdir,$(libdir_SQ)); \ cp -fpR $(LIB_FILE) $(DESTDIR)$(libdir_SQ) -install_headers: +install_headers: bpf_helper_defs.h $(call QUIET_INSTALL, headers) \ $(call do_install,bpf.h,$(prefix)/include/bpf,644); \ $(call do_install,libbpf.h,$(prefix)/include/bpf,644); \ @@ -244,6 +247,7 @@ install_headers: $(call do_install,libbpf_util.h,$(prefix)/include/bpf,644); \ $(call do_install,xsk.h,$(prefix)/include/bpf,644); \ $(call do_install,bpf_helpers.h,$(prefix)/include/bpf,644); \ + $(call do_install,bpf_helper_defs.h,$(prefix)/include/bpf,644); \ $(call do_install,bpf_tracing.h,$(prefix)/include/bpf,644); \ $(call do_install,bpf_endian.h,$(prefix)/include/bpf,644); @@ -262,7 +266,7 @@ config-clean: clean: $(call QUIET_CLEAN, libbpf) $(RM) $(TARGETS) $(CXX_TEST_TARGET) \ *.o *~ *.a *.so *.so.$(LIBBPF_MAJOR_VERSION) .*.d .*.cmd \ - *.pc LIBBPF-CFLAGS + *.pc LIBBPF-CFLAGS bpf_helper_defs.h $(call QUIET_CLEAN, core-gen) $(RM) $(OUTPUT)FEATURE-DUMP.libbpf diff --git a/tools/lib/bpf/bpf_helpers.h b/tools/lib/bpf/bpf_helpers.h index 6f68e4d3aff7..f5d70ce729f6 100644 --- a/tools/lib/bpf/bpf_helpers.h +++ b/tools/lib/bpf/bpf_helpers.h @@ -2,6 +2,8 @@ #ifndef __BPF_HELPERS__ #define __BPF_HELPERS__ +#include "bpf_helper_defs.h" + #define __uint(name, val) int (*name)[val] #define __type(name, val) typeof(val) *name @@ -24,268 +26,6 @@ #define __always_inline __attribute__((always_inline)) #endif -/* helper functions called from eBPF programs written in C */ -static void *(*bpf_map_lookup_elem)(void *map, const void *key) = - (void *) BPF_FUNC_map_lookup_elem; -static int (*bpf_map_update_elem)(void *map, const void *key, const void *value, - unsigned long long flags) = - (void *) BPF_FUNC_map_update_elem; -static int (*bpf_map_delete_elem)(void *map, const void *key) = - (void *) BPF_FUNC_map_delete_elem; -static int (*bpf_map_push_elem)(void *map, const void *value, - unsigned long long flags) = - (void *) BPF_FUNC_map_push_elem; -static int (*bpf_map_pop_elem)(void *map, void *value) = - (void *) BPF_FUNC_map_pop_elem; -static int (*bpf_map_peek_elem)(void *map, void *value) = - (void *) BPF_FUNC_map_peek_elem; -static int (*bpf_probe_read)(void *dst, int size, const void *unsafe_ptr) = - (void *) BPF_FUNC_probe_read; -static unsigned long long (*bpf_ktime_get_ns)(void) = - (void *) BPF_FUNC_ktime_get_ns; -static int (*bpf_trace_printk)(const char *fmt, int fmt_size, ...) = - (void *) BPF_FUNC_trace_printk; -static void (*bpf_tail_call)(void *ctx, void *map, int index) = - (void *) BPF_FUNC_tail_call; -static unsigned long long (*bpf_get_smp_processor_id)(void) = - (void *) BPF_FUNC_get_smp_processor_id; -static unsigned long long (*bpf_get_current_pid_tgid)(void) = - (void *) BPF_FUNC_get_current_pid_tgid; -static unsigned long long (*bpf_get_current_uid_gid)(void) = - (void *) BPF_FUNC_get_current_uid_gid; -static int (*bpf_get_current_comm)(void *buf, int buf_size) = - (void *) BPF_FUNC_get_current_comm; -static unsigned long long (*bpf_perf_event_read)(void *map, - unsigned long long flags) = - (void *) BPF_FUNC_perf_event_read; -static int (*bpf_clone_redirect)(void *ctx, int ifindex, int flags) = - (void *) BPF_FUNC_clone_redirect; -static int (*bpf_redirect)(int ifindex, int flags) = - (void *) BPF_FUNC_redirect; -static int (*bpf_redirect_map)(void *map, int key, int flags) = - (void *) BPF_FUNC_redirect_map; -static int (*bpf_perf_event_output)(void *ctx, void *map, - unsigned long long flags, void *data, - int size) = - (void *) BPF_FUNC_perf_event_output; -static int (*bpf_get_stackid)(void *ctx, void *map, int flags) = - (void *) BPF_FUNC_get_stackid; -static int (*bpf_probe_write_user)(void *dst, const void *src, int size) = - (void *) BPF_FUNC_probe_write_user; -static int (*bpf_current_task_under_cgroup)(void *map, int index) = - (void *) BPF_FUNC_current_task_under_cgroup; -static int (*bpf_skb_get_tunnel_key)(void *ctx, void *key, int size, int flags) = - (void *) BPF_FUNC_skb_get_tunnel_key; -static int (*bpf_skb_set_tunnel_key)(void *ctx, void *key, int size, int flags) = - (void *) BPF_FUNC_skb_set_tunnel_key; -static int (*bpf_skb_get_tunnel_opt)(void *ctx, void *md, int size) = - (void *) BPF_FUNC_skb_get_tunnel_opt; -static int (*bpf_skb_set_tunnel_opt)(void *ctx, void *md, int size) = - (void *) BPF_FUNC_skb_set_tunnel_opt; -static unsigned long long (*bpf_get_prandom_u32)(void) = - (void *) BPF_FUNC_get_prandom_u32; -static int (*bpf_xdp_adjust_head)(void *ctx, int offset) = - (void *) BPF_FUNC_xdp_adjust_head; -static int (*bpf_xdp_adjust_meta)(void *ctx, int offset) = - (void *) BPF_FUNC_xdp_adjust_meta; -static int (*bpf_get_socket_cookie)(void *ctx) = - (void *) BPF_FUNC_get_socket_cookie; -static int (*bpf_setsockopt)(void *ctx, int level, int optname, void *optval, - int optlen) = - (void *) BPF_FUNC_setsockopt; -static int (*bpf_getsockopt)(void *ctx, int level, int optname, void *optval, - int optlen) = - (void *) BPF_FUNC_getsockopt; -static int (*bpf_sock_ops_cb_flags_set)(void *ctx, int flags) = - (void *) BPF_FUNC_sock_ops_cb_flags_set; -static int (*bpf_sk_redirect_map)(void *ctx, void *map, int key, int flags) = - (void *) BPF_FUNC_sk_redirect_map; -static int (*bpf_sk_redirect_hash)(void *ctx, void *map, void *key, int flags) = - (void *) BPF_FUNC_sk_redirect_hash; -static int (*bpf_sock_map_update)(void *map, void *key, void *value, - unsigned long long flags) = - (void *) BPF_FUNC_sock_map_update; -static int (*bpf_sock_hash_update)(void *map, void *key, void *value, - unsigned long long flags) = - (void *) BPF_FUNC_sock_hash_update; -static int (*bpf_perf_event_read_value)(void *map, unsigned long long flags, - void *buf, unsigned int buf_size) = - (void *) BPF_FUNC_perf_event_read_value; -static int (*bpf_perf_prog_read_value)(void *ctx, void *buf, - unsigned int buf_size) = - (void *) BPF_FUNC_perf_prog_read_value; -static int (*bpf_override_return)(void *ctx, unsigned long rc) = - (void *) BPF_FUNC_override_return; -static int (*bpf_msg_redirect_map)(void *ctx, void *map, int key, int flags) = - (void *) BPF_FUNC_msg_redirect_map; -static int (*bpf_msg_redirect_hash)(void *ctx, - void *map, void *key, int flags) = - (void *) BPF_FUNC_msg_redirect_hash; -static int (*bpf_msg_apply_bytes)(void *ctx, int len) = - (void *) BPF_FUNC_msg_apply_bytes; -static int (*bpf_msg_cork_bytes)(void *ctx, int len) = - (void *) BPF_FUNC_msg_cork_bytes; -static int (*bpf_msg_pull_data)(void *ctx, int start, int end, int flags) = - (void *) BPF_FUNC_msg_pull_data; -static int (*bpf_msg_push_data)(void *ctx, int start, int end, int flags) = - (void *) BPF_FUNC_msg_push_data; -static int (*bpf_msg_pop_data)(void *ctx, int start, int cut, int flags) = - (void *) BPF_FUNC_msg_pop_data; -static int (*bpf_bind)(void *ctx, void *addr, int addr_len) = - (void *) BPF_FUNC_bind; -static int (*bpf_xdp_adjust_tail)(void *ctx, int offset) = - (void *) BPF_FUNC_xdp_adjust_tail; -static int (*bpf_skb_get_xfrm_state)(void *ctx, int index, void *state, - int size, int flags) = - (void *) BPF_FUNC_skb_get_xfrm_state; -static int (*bpf_sk_select_reuseport)(void *ctx, void *map, void *key, __u32 flags) = - (void *) BPF_FUNC_sk_select_reuseport; -static int (*bpf_get_stack)(void *ctx, void *buf, int size, int flags) = - (void *) BPF_FUNC_get_stack; -static int (*bpf_fib_lookup)(void *ctx, struct bpf_fib_lookup *params, - int plen, __u32 flags) = - (void *) BPF_FUNC_fib_lookup; -static int (*bpf_lwt_push_encap)(void *ctx, unsigned int type, void *hdr, - unsigned int len) = - (void *) BPF_FUNC_lwt_push_encap; -static int (*bpf_lwt_seg6_store_bytes)(void *ctx, unsigned int offset, - void *from, unsigned int len) = - (void *) BPF_FUNC_lwt_seg6_store_bytes; -static int (*bpf_lwt_seg6_action)(void *ctx, unsigned int action, void *param, - unsigned int param_len) = - (void *) BPF_FUNC_lwt_seg6_action; -static int (*bpf_lwt_seg6_adjust_srh)(void *ctx, unsigned int offset, - unsigned int len) = - (void *) BPF_FUNC_lwt_seg6_adjust_srh; -static int (*bpf_rc_repeat)(void *ctx) = - (void *) BPF_FUNC_rc_repeat; -static int (*bpf_rc_keydown)(void *ctx, unsigned int protocol, - unsigned long long scancode, unsigned int toggle) = - (void *) BPF_FUNC_rc_keydown; -static unsigned long long (*bpf_get_current_cgroup_id)(void) = - (void *) BPF_FUNC_get_current_cgroup_id; -static void *(*bpf_get_local_storage)(void *map, unsigned long long flags) = - (void *) BPF_FUNC_get_local_storage; -static unsigned long long (*bpf_skb_cgroup_id)(void *ctx) = - (void *) BPF_FUNC_skb_cgroup_id; -static unsigned long long (*bpf_skb_ancestor_cgroup_id)(void *ctx, int level) = - (void *) BPF_FUNC_skb_ancestor_cgroup_id; -static struct bpf_sock *(*bpf_sk_lookup_tcp)(void *ctx, - struct bpf_sock_tuple *tuple, - int size, unsigned long long netns_id, - unsigned long long flags) = - (void *) BPF_FUNC_sk_lookup_tcp; -static struct bpf_sock *(*bpf_skc_lookup_tcp)(void *ctx, - struct bpf_sock_tuple *tuple, - int size, unsigned long long netns_id, - unsigned long long flags) = - (void *) BPF_FUNC_skc_lookup_tcp; -static struct bpf_sock *(*bpf_sk_lookup_udp)(void *ctx, - struct bpf_sock_tuple *tuple, - int size, unsigned long long netns_id, - unsigned long long flags) = - (void *) BPF_FUNC_sk_lookup_udp; -static int (*bpf_sk_release)(struct bpf_sock *sk) = - (void *) BPF_FUNC_sk_release; -static int (*bpf_skb_vlan_push)(void *ctx, __be16 vlan_proto, __u16 vlan_tci) = - (void *) BPF_FUNC_skb_vlan_push; -static int (*bpf_skb_vlan_pop)(void *ctx) = - (void *) BPF_FUNC_skb_vlan_pop; -static int (*bpf_rc_pointer_rel)(void *ctx, int rel_x, int rel_y) = - (void *) BPF_FUNC_rc_pointer_rel; -static void (*bpf_spin_lock)(struct bpf_spin_lock *lock) = - (void *) BPF_FUNC_spin_lock; -static void (*bpf_spin_unlock)(struct bpf_spin_lock *lock) = - (void *) BPF_FUNC_spin_unlock; -static struct bpf_sock *(*bpf_sk_fullsock)(struct bpf_sock *sk) = - (void *) BPF_FUNC_sk_fullsock; -static struct bpf_tcp_sock *(*bpf_tcp_sock)(struct bpf_sock *sk) = - (void *) BPF_FUNC_tcp_sock; -static struct bpf_sock *(*bpf_get_listener_sock)(struct bpf_sock *sk) = - (void *) BPF_FUNC_get_listener_sock; -static int (*bpf_skb_ecn_set_ce)(void *ctx) = - (void *) BPF_FUNC_skb_ecn_set_ce; -static int (*bpf_tcp_check_syncookie)(struct bpf_sock *sk, - void *ip, int ip_len, void *tcp, int tcp_len) = - (void *) BPF_FUNC_tcp_check_syncookie; -static int (*bpf_sysctl_get_name)(void *ctx, char *buf, - unsigned long long buf_len, - unsigned long long flags) = - (void *) BPF_FUNC_sysctl_get_name; -static int (*bpf_sysctl_get_current_value)(void *ctx, char *buf, - unsigned long long buf_len) = - (void *) BPF_FUNC_sysctl_get_current_value; -static int (*bpf_sysctl_get_new_value)(void *ctx, char *buf, - unsigned long long buf_len) = - (void *) BPF_FUNC_sysctl_get_new_value; -static int (*bpf_sysctl_set_new_value)(void *ctx, const char *buf, - unsigned long long buf_len) = - (void *) BPF_FUNC_sysctl_set_new_value; -static int (*bpf_strtol)(const char *buf, unsigned long long buf_len, - unsigned long long flags, long *res) = - (void *) BPF_FUNC_strtol; -static int (*bpf_strtoul)(const char *buf, unsigned long long buf_len, - unsigned long long flags, unsigned long *res) = - (void *) BPF_FUNC_strtoul; -static void *(*bpf_sk_storage_get)(void *map, struct bpf_sock *sk, - void *value, __u64 flags) = - (void *) BPF_FUNC_sk_storage_get; -static int (*bpf_sk_storage_delete)(void *map, struct bpf_sock *sk) = - (void *)BPF_FUNC_sk_storage_delete; -static int (*bpf_send_signal)(unsigned sig) = (void *)BPF_FUNC_send_signal; -static long long (*bpf_tcp_gen_syncookie)(struct bpf_sock *sk, void *ip, - int ip_len, void *tcp, int tcp_len) = - (void *) BPF_FUNC_tcp_gen_syncookie; - -static int (*bpf_skb_load_bytes)(void *ctx, int off, void *to, int len) = - (void *) BPF_FUNC_skb_load_bytes; -static int (*bpf_skb_load_bytes_relative)(void *ctx, int off, void *to, int len, __u32 start_header) = - (void *) BPF_FUNC_skb_load_bytes_relative; -static int (*bpf_skb_store_bytes)(void *ctx, int off, void *from, int len, int flags) = - (void *) BPF_FUNC_skb_store_bytes; -static int (*bpf_l3_csum_replace)(void *ctx, int off, int from, int to, int flags) = - (void *) BPF_FUNC_l3_csum_replace; -static int (*bpf_l4_csum_replace)(void *ctx, int off, int from, int to, int flags) = - (void *) BPF_FUNC_l4_csum_replace; -static int (*bpf_csum_diff)(void *from, int from_size, void *to, int to_size, int seed) = - (void *) BPF_FUNC_csum_diff; -static int (*bpf_skb_under_cgroup)(void *ctx, void *map, int index) = - (void *) BPF_FUNC_skb_under_cgroup; -static int (*bpf_skb_change_head)(void *, int len, int flags) = - (void *) BPF_FUNC_skb_change_head; -static int (*bpf_skb_pull_data)(void *, int len) = - (void *) BPF_FUNC_skb_pull_data; -static unsigned int (*bpf_get_cgroup_classid)(void *ctx) = - (void *) BPF_FUNC_get_cgroup_classid; -static unsigned int (*bpf_get_route_realm)(void *ctx) = - (void *) BPF_FUNC_get_route_realm; -static int (*bpf_skb_change_proto)(void *ctx, __be16 proto, __u64 flags) = - (void *) BPF_FUNC_skb_change_proto; -static int (*bpf_skb_change_type)(void *ctx, __u32 type) = - (void *) BPF_FUNC_skb_change_type; -static unsigned int (*bpf_get_hash_recalc)(void *ctx) = - (void *) BPF_FUNC_get_hash_recalc; -static unsigned long long (*bpf_get_current_task)(void) = - (void *) BPF_FUNC_get_current_task; -static int (*bpf_skb_change_tail)(void *ctx, __u32 len, __u64 flags) = - (void *) BPF_FUNC_skb_change_tail; -static long long (*bpf_csum_update)(void *ctx, __u32 csum) = - (void *) BPF_FUNC_csum_update; -static void (*bpf_set_hash_invalid)(void *ctx) = - (void *) BPF_FUNC_set_hash_invalid; -static int (*bpf_get_numa_node_id)(void) = - (void *) BPF_FUNC_get_numa_node_id; -static int (*bpf_probe_read_str)(void *ctx, __u32 size, - const void *unsafe_ptr) = - (void *) BPF_FUNC_probe_read_str; -static unsigned int (*bpf_get_socket_uid)(void *ctx) = - (void *) BPF_FUNC_get_socket_uid; -static unsigned int (*bpf_set_hash)(void *ctx, __u32 hash) = - (void *) BPF_FUNC_set_hash; -static int (*bpf_skb_adjust_room)(void *ctx, __s32 len_diff, __u32 mode, - unsigned long long flags) = - (void *) BPF_FUNC_skb_adjust_room; - /* * Helper structure used by eBPF C program * to describe BPF map attributes to libbpf loader