diff options
| -rw-r--r-- | tools/lib/bpf/libbpf.h | 10 | ||||
| -rw-r--r-- | tools/lib/bpf/libbpf.map | 1 | ||||
| -rw-r--r-- | tools/lib/bpf/netlink.c | 84 |
3 files changed, 67 insertions, 28 deletions
diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h index 6ddc0419337b..f0947cc949d2 100644 --- a/tools/lib/bpf/libbpf.h +++ b/tools/lib/bpf/libbpf.h @@ -427,8 +427,18 @@ LIBBPF_API int bpf_prog_load_xattr(const struct bpf_prog_load_attr *attr, LIBBPF_API int bpf_prog_load(const char *file, enum bpf_prog_type type, struct bpf_object **pobj, int *prog_fd); +struct xdp_link_info { + __u32 prog_id; + __u32 drv_prog_id; + __u32 hw_prog_id; + __u32 skb_prog_id; + __u8 attach_mode; +}; + LIBBPF_API int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags); LIBBPF_API int bpf_get_link_xdp_id(int ifindex, __u32 *prog_id, __u32 flags); +LIBBPF_API int bpf_get_link_xdp_info(int ifindex, struct xdp_link_info *info, + size_t info_size, __u32 flags); struct perf_buffer; diff --git a/tools/lib/bpf/libbpf.map b/tools/lib/bpf/libbpf.map index 86173cbb159d..d1a782a3a58d 100644 --- a/tools/lib/bpf/libbpf.map +++ b/tools/lib/bpf/libbpf.map @@ -193,6 +193,7 @@ LIBBPF_0.0.5 { LIBBPF_0.0.6 { global: + bpf_get_link_xdp_info; bpf_map__get_pin_path; bpf_map__is_pinned; bpf_map__set_pin_path; diff --git a/tools/lib/bpf/netlink.c b/tools/lib/bpf/netlink.c index a261df9cb488..5065c1aa1061 100644 --- a/tools/lib/bpf/netlink.c +++ b/tools/lib/bpf/netlink.c @@ -25,7 +25,7 @@ typedef int (*__dump_nlmsg_t)(struct nlmsghdr *nlmsg, libbpf_dump_nlmsg_t, struct xdp_id_md { int ifindex; __u32 flags; - __u32 id; + struct xdp_link_info info; }; int libbpf_netlink_open(__u32 *nl_pid) @@ -203,26 +203,11 @@ static int __dump_link_nlmsg(struct nlmsghdr *nlh, return dump_link_nlmsg(cookie, ifi, tb); } -static unsigned char get_xdp_id_attr(unsigned char mode, __u32 flags) -{ - if (mode != XDP_ATTACHED_MULTI) - return IFLA_XDP_PROG_ID; - if (flags & XDP_FLAGS_DRV_MODE) - return IFLA_XDP_DRV_PROG_ID; - if (flags & XDP_FLAGS_HW_MODE) - return IFLA_XDP_HW_PROG_ID; - if (flags & XDP_FLAGS_SKB_MODE) - return IFLA_XDP_SKB_PROG_ID; - - return IFLA_XDP_UNSPEC; -} - -static int get_xdp_id(void *cookie, void *msg, struct nlattr **tb) +static int get_xdp_info(void *cookie, void *msg, struct nlattr **tb) { struct nlattr *xdp_tb[IFLA_XDP_MAX + 1]; struct xdp_id_md *xdp_id = cookie; struct ifinfomsg *ifinfo = msg; - unsigned char mode, xdp_attr; int ret; if (xdp_id->ifindex && xdp_id->ifindex != ifinfo->ifi_index) @@ -238,27 +223,40 @@ static int get_xdp_id(void *cookie, void *msg, struct nlattr **tb) if (!xdp_tb[IFLA_XDP_ATTACHED]) return 0; - mode = libbpf_nla_getattr_u8(xdp_tb[IFLA_XDP_ATTACHED]); - if (mode == XDP_ATTACHED_NONE) - return 0; + xdp_id->info.attach_mode = libbpf_nla_getattr_u8( + xdp_tb[IFLA_XDP_ATTACHED]); - xdp_attr = get_xdp_id_attr(mode, xdp_id->flags); - if (!xdp_attr || !xdp_tb[xdp_attr]) + if (xdp_id->info.attach_mode == XDP_ATTACHED_NONE) return 0; - xdp_id->id = libbpf_nla_getattr_u32(xdp_tb[xdp_attr]); + if (xdp_tb[IFLA_XDP_PROG_ID]) + xdp_id->info.prog_id = libbpf_nla_getattr_u32( + xdp_tb[IFLA_XDP_PROG_ID]); + + if (xdp_tb[IFLA_XDP_SKB_PROG_ID]) + xdp_id->info.skb_prog_id = libbpf_nla_getattr_u32( + xdp_tb[IFLA_XDP_SKB_PROG_ID]); + + if (xdp_tb[IFLA_XDP_DRV_PROG_ID]) + xdp_id->info.drv_prog_id = libbpf_nla_getattr_u32( + xdp_tb[IFLA_XDP_DRV_PROG_ID]); + + if (xdp_tb[IFLA_XDP_HW_PROG_ID]) + xdp_id->info.hw_prog_id = libbpf_nla_getattr_u32( + xdp_tb[IFLA_XDP_HW_PROG_ID]); return 0; } -int bpf_get_link_xdp_id(int ifindex, __u32 *prog_id, __u32 flags) +int bpf_get_link_xdp_info(int ifindex, struct xdp_link_info *info, + size_t info_size, __u32 flags) { struct xdp_id_md xdp_id = {}; int sock, ret; __u32 nl_pid; __u32 mask; - if (flags & ~XDP_FLAGS_MASK) + if (flags & ~XDP_FLAGS_MASK || !info_size) return -EINVAL; /* Check whether the single {HW,DRV,SKB} mode is set */ @@ -274,14 +272,44 @@ int bpf_get_link_xdp_id(int ifindex, __u32 *prog_id, __u32 flags) xdp_id.ifindex = ifindex; xdp_id.flags = flags; - ret = libbpf_nl_get_link(sock, nl_pid, get_xdp_id, &xdp_id); - if (!ret) - *prog_id = xdp_id.id; + ret = libbpf_nl_get_link(sock, nl_pid, get_xdp_info, &xdp_id); + if (!ret) { + size_t sz = min(info_size, sizeof(xdp_id.info)); + + memcpy(info, &xdp_id.info, sz); + memset((void *) info + sz, 0, info_size - sz); + } close(sock); return ret; } +static __u32 get_xdp_id(struct xdp_link_info *info, __u32 flags) +{ + if (info->attach_mode != XDP_ATTACHED_MULTI) + 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; + + return 0; +} + +int bpf_get_link_xdp_id(int ifindex, __u32 *prog_id, __u32 flags) +{ + struct xdp_link_info info; + int ret; + + ret = bpf_get_link_xdp_info(ifindex, &info, sizeof(info), flags); + if (!ret) + *prog_id = get_xdp_id(&info, flags); + + return ret; +} + int libbpf_nl_get_link(int sock, unsigned int nl_pid, libbpf_dump_nlmsg_t dump_link_nlmsg, void *cookie) { |