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-rw-r--r--tools/lib/bpf/libbpf.h29
-rw-r--r--tools/lib/bpf/libbpf.map4
-rw-r--r--tools/lib/bpf/netlink.c117
3 files changed, 117 insertions, 33 deletions
diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h
index 9728551501ae..94670066de62 100644
--- a/tools/lib/bpf/libbpf.h
+++ b/tools/lib/bpf/libbpf.h
@@ -833,13 +833,42 @@ struct bpf_xdp_set_link_opts {
};
#define bpf_xdp_set_link_opts__last_field old_fd
+LIBBPF_DEPRECATED_SINCE(0, 8, "use bpf_xdp_attach() instead")
LIBBPF_API int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags);
+LIBBPF_DEPRECATED_SINCE(0, 8, "use bpf_xdp_attach() instead")
LIBBPF_API int bpf_set_link_xdp_fd_opts(int ifindex, int fd, __u32 flags,
const struct bpf_xdp_set_link_opts *opts);
+LIBBPF_DEPRECATED_SINCE(0, 8, "use bpf_xdp_query_id() instead")
LIBBPF_API int bpf_get_link_xdp_id(int ifindex, __u32 *prog_id, __u32 flags);
+LIBBPF_DEPRECATED_SINCE(0, 8, "use bpf_xdp_query() instead")
LIBBPF_API int bpf_get_link_xdp_info(int ifindex, struct xdp_link_info *info,
size_t info_size, __u32 flags);
+struct bpf_xdp_attach_opts {
+ size_t sz;
+ int old_prog_fd;
+ size_t :0;
+};
+#define bpf_xdp_attach_opts__last_field old_prog_fd
+
+struct bpf_xdp_query_opts {
+ size_t sz;
+ __u32 prog_id; /* output */
+ __u32 drv_prog_id; /* output */
+ __u32 hw_prog_id; /* output */
+ __u32 skb_prog_id; /* output */
+ __u8 attach_mode; /* output */
+ size_t :0;
+};
+#define bpf_xdp_query_opts__last_field attach_mode
+
+LIBBPF_API int bpf_xdp_attach(int ifindex, int prog_fd, __u32 flags,
+ const struct bpf_xdp_attach_opts *opts);
+LIBBPF_API int bpf_xdp_detach(int ifindex, __u32 flags,
+ const struct bpf_xdp_attach_opts *opts);
+LIBBPF_API int bpf_xdp_query(int ifindex, int flags, struct bpf_xdp_query_opts *opts);
+LIBBPF_API int bpf_xdp_query_id(int ifindex, int flags, __u32 *prog_id);
+
/* TC related API */
enum bpf_tc_attach_point {
BPF_TC_INGRESS = 1 << 0,
diff --git a/tools/lib/bpf/libbpf.map b/tools/lib/bpf/libbpf.map
index 8262cfca2240..e10f0822845a 100644
--- a/tools/lib/bpf/libbpf.map
+++ b/tools/lib/bpf/libbpf.map
@@ -428,6 +428,10 @@ LIBBPF_0.7.0 {
bpf_program__log_level;
bpf_program__set_log_buf;
bpf_program__set_log_level;
+ bpf_xdp_attach;
+ bpf_xdp_detach;
+ bpf_xdp_query;
+ bpf_xdp_query_id;
libbpf_probe_bpf_helper;
libbpf_probe_bpf_map_type;
libbpf_probe_bpf_prog_type;
diff --git a/tools/lib/bpf/netlink.c b/tools/lib/bpf/netlink.c
index 39f25e09b51e..c39c37f99d5c 100644
--- a/tools/lib/bpf/netlink.c
+++ b/tools/lib/bpf/netlink.c
@@ -217,6 +217,28 @@ static int __bpf_set_link_xdp_fd_replace(int ifindex, int fd, int old_fd,
return libbpf_netlink_send_recv(&req, NULL, NULL, NULL);
}
+int bpf_xdp_attach(int ifindex, int prog_fd, __u32 flags, const struct bpf_xdp_attach_opts *opts)
+{
+ int old_prog_fd, err;
+
+ if (!OPTS_VALID(opts, bpf_xdp_attach_opts))
+ return libbpf_err(-EINVAL);
+
+ old_prog_fd = OPTS_GET(opts, old_prog_fd, 0);
+ if (old_prog_fd)
+ flags |= XDP_FLAGS_REPLACE;
+ else
+ old_prog_fd = -1;
+
+ err = __bpf_set_link_xdp_fd_replace(ifindex, prog_fd, old_prog_fd, flags);
+ return libbpf_err(err);
+}
+
+int bpf_xdp_detach(int ifindex, __u32 flags, const struct bpf_xdp_attach_opts *opts)
+{
+ return bpf_xdp_attach(ifindex, -1, flags, opts);
+}
+
int bpf_set_link_xdp_fd_opts(int ifindex, int fd, __u32 flags,
const struct bpf_xdp_set_link_opts *opts)
{
@@ -303,69 +325,98 @@ static int get_xdp_info(void *cookie, void *msg, struct nlattr **tb)
return 0;
}
-int bpf_get_link_xdp_info(int ifindex, struct xdp_link_info *info,
- size_t info_size, __u32 flags)
+int bpf_xdp_query(int ifindex, int xdp_flags, struct bpf_xdp_query_opts *opts)
{
- struct xdp_id_md xdp_id = {};
- __u32 mask;
- int ret;
struct libbpf_nla_req req = {
.nh.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg)),
.nh.nlmsg_type = RTM_GETLINK,
.nh.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST,
.ifinfo.ifi_family = AF_PACKET,
};
+ struct xdp_id_md xdp_id = {};
+ int err;
- if (flags & ~XDP_FLAGS_MASK || !info_size)
+ if (!OPTS_VALID(opts, bpf_xdp_query_opts))
+ return libbpf_err(-EINVAL);
+
+ if (xdp_flags & ~XDP_FLAGS_MASK)
return libbpf_err(-EINVAL);
/* Check whether the single {HW,DRV,SKB} mode is set */
- flags &= (XDP_FLAGS_SKB_MODE | XDP_FLAGS_DRV_MODE | XDP_FLAGS_HW_MODE);
- mask = flags - 1;
- if (flags && flags & mask)
+ xdp_flags &= XDP_FLAGS_SKB_MODE | XDP_FLAGS_DRV_MODE | XDP_FLAGS_HW_MODE;
+ if (xdp_flags & (xdp_flags - 1))
return libbpf_err(-EINVAL);
xdp_id.ifindex = ifindex;
- xdp_id.flags = flags;
+ xdp_id.flags = xdp_flags;
- ret = libbpf_netlink_send_recv(&req, __dump_link_nlmsg,
+ err = libbpf_netlink_send_recv(&req, __dump_link_nlmsg,
get_xdp_info, &xdp_id);
- if (!ret) {
- size_t sz = min(info_size, sizeof(xdp_id.info));
+ if (err)
+ return libbpf_err(err);
- memcpy(info, &xdp_id.info, sz);
- memset((void *) info + sz, 0, info_size - sz);
- }
+ OPTS_SET(opts, prog_id, xdp_id.info.prog_id);
+ OPTS_SET(opts, drv_prog_id, xdp_id.info.drv_prog_id);
+ OPTS_SET(opts, hw_prog_id, xdp_id.info.hw_prog_id);
+ OPTS_SET(opts, skb_prog_id, xdp_id.info.skb_prog_id);
+ OPTS_SET(opts, attach_mode, xdp_id.info.attach_mode);
- return libbpf_err(ret);
+ return 0;
}
-static __u32 get_xdp_id(struct xdp_link_info *info, __u32 flags)
+int bpf_get_link_xdp_info(int ifindex, struct xdp_link_info *info,
+ size_t info_size, __u32 flags)
{
- flags &= XDP_FLAGS_MODES;
+ LIBBPF_OPTS(bpf_xdp_query_opts, opts);
+ size_t sz;
+ int err;
+
+ if (!info_size)
+ return libbpf_err(-EINVAL);
- if (info->attach_mode != XDP_ATTACHED_MULTI && !flags)
- return info->prog_id;
- if (flags & XDP_FLAGS_DRV_MODE)
- return info->drv_prog_id;
- if (flags & XDP_FLAGS_HW_MODE)
- return info->hw_prog_id;
- if (flags & XDP_FLAGS_SKB_MODE)
- return info->skb_prog_id;
+ err = bpf_xdp_query(ifindex, flags, &opts);
+ if (err)
+ return libbpf_err(err);
+
+ /* struct xdp_link_info field layout matches struct bpf_xdp_query_opts
+ * layout after sz field
+ */
+ sz = min(info_size, offsetofend(struct xdp_link_info, attach_mode));
+ memcpy(info, &opts.prog_id, sz);
+ memset((void *)info + sz, 0, info_size - sz);
return 0;
}
-int bpf_get_link_xdp_id(int ifindex, __u32 *prog_id, __u32 flags)
+int bpf_xdp_query_id(int ifindex, int flags, __u32 *prog_id)
{
- struct xdp_link_info info;
+ LIBBPF_OPTS(bpf_xdp_query_opts, opts);
int ret;
- ret = bpf_get_link_xdp_info(ifindex, &info, sizeof(info), flags);
- if (!ret)
- *prog_id = get_xdp_id(&info, flags);
+ ret = bpf_xdp_query(ifindex, flags, &opts);
+ if (ret)
+ return libbpf_err(ret);
+
+ flags &= XDP_FLAGS_MODES;
- return libbpf_err(ret);
+ if (opts.attach_mode != XDP_ATTACHED_MULTI && !flags)
+ *prog_id = opts.prog_id;
+ else if (flags & XDP_FLAGS_DRV_MODE)
+ *prog_id = opts.drv_prog_id;
+ else if (flags & XDP_FLAGS_HW_MODE)
+ *prog_id = opts.hw_prog_id;
+ else if (flags & XDP_FLAGS_SKB_MODE)
+ *prog_id = opts.skb_prog_id;
+ else
+ *prog_id = 0;
+
+ return 0;
+}
+
+
+int bpf_get_link_xdp_id(int ifindex, __u32 *prog_id, __u32 flags)
+{
+ return bpf_xdp_query_id(ifindex, flags, prog_id);
}
typedef int (*qdisc_config_t)(struct libbpf_nla_req *req);
generated by cgit v1.2.3 (git 2.39.1) at 2025-02-06 05:32:09 +0100