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-rw-r--r--net/ipv4/af_inet.c1
-rw-r--r--net/ipv4/bpf_tcp_ca.c43
-rw-r--r--net/ipv4/tcp_bpf.c130
-rw-r--r--net/ipv4/tcp_cubic.c24
-rw-r--r--net/ipv4/tcp_ipv4.c3
-rw-r--r--net/ipv4/udp.c32
-rw-r--r--net/ipv4/udp_bpf.c79
7 files changed, 190 insertions, 122 deletions
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index 1355e6c0d567..f17870ee558b 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -1070,6 +1070,7 @@ const struct proto_ops inet_dgram_ops = {
.setsockopt = sock_common_setsockopt,
.getsockopt = sock_common_getsockopt,
.sendmsg = inet_sendmsg,
+ .read_sock = udp_read_sock,
.recvmsg = inet_recvmsg,
.mmap = sock_no_mmap,
.sendpage = inet_sendpage,
diff --git a/net/ipv4/bpf_tcp_ca.c b/net/ipv4/bpf_tcp_ca.c
index d520e61649c8..dff4f0eb96b0 100644
--- a/net/ipv4/bpf_tcp_ca.c
+++ b/net/ipv4/bpf_tcp_ca.c
@@ -5,6 +5,7 @@
#include <linux/bpf_verifier.h>
#include <linux/bpf.h>
#include <linux/btf.h>
+#include <linux/btf_ids.h>
#include <linux/filter.h>
#include <net/tcp.h>
#include <net/bpf_sk_storage.h>
@@ -178,10 +179,52 @@ bpf_tcp_ca_get_func_proto(enum bpf_func_id func_id,
}
}
+BTF_SET_START(bpf_tcp_ca_kfunc_ids)
+BTF_ID(func, tcp_reno_ssthresh)
+BTF_ID(func, tcp_reno_cong_avoid)
+BTF_ID(func, tcp_reno_undo_cwnd)
+BTF_ID(func, tcp_slow_start)
+BTF_ID(func, tcp_cong_avoid_ai)
+#ifdef CONFIG_DYNAMIC_FTRACE
+#if IS_BUILTIN(CONFIG_TCP_CONG_CUBIC)
+BTF_ID(func, cubictcp_init)
+BTF_ID(func, cubictcp_recalc_ssthresh)
+BTF_ID(func, cubictcp_cong_avoid)
+BTF_ID(func, cubictcp_state)
+BTF_ID(func, cubictcp_cwnd_event)
+BTF_ID(func, cubictcp_acked)
+#endif
+#if IS_BUILTIN(CONFIG_TCP_CONG_DCTCP)
+BTF_ID(func, dctcp_init)
+BTF_ID(func, dctcp_update_alpha)
+BTF_ID(func, dctcp_cwnd_event)
+BTF_ID(func, dctcp_ssthresh)
+BTF_ID(func, dctcp_cwnd_undo)
+BTF_ID(func, dctcp_state)
+#endif
+#if IS_BUILTIN(CONFIG_TCP_CONG_BBR)
+BTF_ID(func, bbr_init)
+BTF_ID(func, bbr_main)
+BTF_ID(func, bbr_sndbuf_expand)
+BTF_ID(func, bbr_undo_cwnd)
+BTF_ID(func, bbr_cwnd_event)
+BTF_ID(func, bbr_ssthresh)
+BTF_ID(func, bbr_min_tso_segs)
+BTF_ID(func, bbr_set_state)
+#endif
+#endif /* CONFIG_DYNAMIC_FTRACE */
+BTF_SET_END(bpf_tcp_ca_kfunc_ids)
+
+static bool bpf_tcp_ca_check_kfunc_call(u32 kfunc_btf_id)
+{
+ return btf_id_set_contains(&bpf_tcp_ca_kfunc_ids, kfunc_btf_id);
+}
+
static const struct bpf_verifier_ops bpf_tcp_ca_verifier_ops = {
.get_func_proto = bpf_tcp_ca_get_func_proto,
.is_valid_access = bpf_tcp_ca_is_valid_access,
.btf_struct_access = bpf_tcp_ca_btf_struct_access,
+ .check_kfunc_call = bpf_tcp_ca_check_kfunc_call,
};
static int bpf_tcp_ca_init_member(const struct btf_type *t,
diff --git a/net/ipv4/tcp_bpf.c b/net/ipv4/tcp_bpf.c
index 17c322b875fd..3d622a0d0753 100644
--- a/net/ipv4/tcp_bpf.c
+++ b/net/ipv4/tcp_bpf.c
@@ -10,86 +10,6 @@
#include <net/inet_common.h>
#include <net/tls.h>
-int __tcp_bpf_recvmsg(struct sock *sk, struct sk_psock *psock,
- struct msghdr *msg, int len, int flags)
-{
- struct iov_iter *iter = &msg->msg_iter;
- int peek = flags & MSG_PEEK;
- struct sk_msg *msg_rx;
- int i, copied = 0;
-
- msg_rx = list_first_entry_or_null(&psock->ingress_msg,
- struct sk_msg, list);
-
- while (copied != len) {
- struct scatterlist *sge;
-
- if (unlikely(!msg_rx))
- break;
-
- i = msg_rx->sg.start;
- do {
- struct page *page;
- int copy;
-
- sge = sk_msg_elem(msg_rx, i);
- copy = sge->length;
- page = sg_page(sge);
- if (copied + copy > len)
- copy = len - copied;
- copy = copy_page_to_iter(page, sge->offset, copy, iter);
- if (!copy)
- return copied ? copied : -EFAULT;
-
- copied += copy;
- if (likely(!peek)) {
- sge->offset += copy;
- sge->length -= copy;
- if (!msg_rx->skb)
- sk_mem_uncharge(sk, copy);
- msg_rx->sg.size -= copy;
-
- if (!sge->length) {
- sk_msg_iter_var_next(i);
- if (!msg_rx->skb)
- put_page(page);
- }
- } else {
- /* Lets not optimize peek case if copy_page_to_iter
- * didn't copy the entire length lets just break.
- */
- if (copy != sge->length)
- return copied;
- sk_msg_iter_var_next(i);
- }
-
- if (copied == len)
- break;
- } while (i != msg_rx->sg.end);
-
- if (unlikely(peek)) {
- if (msg_rx == list_last_entry(&psock->ingress_msg,
- struct sk_msg, list))
- break;
- msg_rx = list_next_entry(msg_rx, list);
- continue;
- }
-
- msg_rx->sg.start = i;
- if (!sge->length && msg_rx->sg.start == msg_rx->sg.end) {
- list_del(&msg_rx->list);
- if (msg_rx->skb)
- consume_skb(msg_rx->skb);
- kfree(msg_rx);
- }
- msg_rx = list_first_entry_or_null(&psock->ingress_msg,
- struct sk_msg, list);
- }
-
- return copied;
-}
-EXPORT_SYMBOL_GPL(__tcp_bpf_recvmsg);
-
static int bpf_tcp_ingress(struct sock *sk, struct sk_psock *psock,
struct sk_msg *msg, u32 apply_bytes, int flags)
{
@@ -243,28 +163,6 @@ static bool tcp_bpf_stream_read(const struct sock *sk)
return !empty;
}
-static int tcp_bpf_wait_data(struct sock *sk, struct sk_psock *psock,
- int flags, long timeo, int *err)
-{
- DEFINE_WAIT_FUNC(wait, woken_wake_function);
- int ret = 0;
-
- if (sk->sk_shutdown & RCV_SHUTDOWN)
- return 1;
-
- if (!timeo)
- return ret;
-
- add_wait_queue(sk_sleep(sk), &wait);
- sk_set_bit(SOCKWQ_ASYNC_WAITDATA, sk);
- ret = sk_wait_event(sk, &timeo,
- !list_empty(&psock->ingress_msg) ||
- !skb_queue_empty(&sk->sk_receive_queue), &wait);
- sk_clear_bit(SOCKWQ_ASYNC_WAITDATA, sk);
- remove_wait_queue(sk_sleep(sk), &wait);
- return ret;
-}
-
static int tcp_bpf_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
int nonblock, int flags, int *addr_len)
{
@@ -284,13 +182,13 @@ static int tcp_bpf_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
}
lock_sock(sk);
msg_bytes_ready:
- copied = __tcp_bpf_recvmsg(sk, psock, msg, len, flags);
+ copied = sk_msg_recvmsg(sk, psock, msg, len, flags);
if (!copied) {
int data, err = 0;
long timeo;
timeo = sock_rcvtimeo(sk, nonblock);
- data = tcp_bpf_wait_data(sk, psock, flags, timeo, &err);
+ data = sk_msg_wait_data(sk, psock, flags, timeo, &err);
if (data) {
if (!sk_psock_queue_empty(psock))
goto msg_bytes_ready;
@@ -601,20 +499,38 @@ static int tcp_bpf_assert_proto_ops(struct proto *ops)
ops->sendpage == tcp_sendpage ? 0 : -ENOTSUPP;
}
-struct proto *tcp_bpf_get_proto(struct sock *sk, struct sk_psock *psock)
+int tcp_bpf_update_proto(struct sock *sk, bool restore)
{
+ struct sk_psock *psock = sk_psock(sk);
int family = sk->sk_family == AF_INET6 ? TCP_BPF_IPV6 : TCP_BPF_IPV4;
int config = psock->progs.msg_parser ? TCP_BPF_TX : TCP_BPF_BASE;
+ if (restore) {
+ if (inet_csk_has_ulp(sk)) {
+ tcp_update_ulp(sk, psock->sk_proto, psock->saved_write_space);
+ } else {
+ sk->sk_write_space = psock->saved_write_space;
+ /* Pairs with lockless read in sk_clone_lock() */
+ WRITE_ONCE(sk->sk_prot, psock->sk_proto);
+ }
+ return 0;
+ }
+
+ if (inet_csk_has_ulp(sk))
+ return -EINVAL;
+
if (sk->sk_family == AF_INET6) {
if (tcp_bpf_assert_proto_ops(psock->sk_proto))
- return ERR_PTR(-EINVAL);
+ return -EINVAL;
tcp_bpf_check_v6_needs_rebuild(psock->sk_proto);
}
- return &tcp_bpf_prots[family][config];
+ /* Pairs with lockless read in sk_clone_lock() */
+ WRITE_ONCE(sk->sk_prot, &tcp_bpf_prots[family][config]);
+ return 0;
}
+EXPORT_SYMBOL_GPL(tcp_bpf_update_proto);
/* If a child got cloned from a listening socket that had tcp_bpf
* protocol callbacks installed, we need to restore the callbacks to
diff --git a/net/ipv4/tcp_cubic.c b/net/ipv4/tcp_cubic.c
index ffcbe46dacdb..4a30deaa9a37 100644
--- a/net/ipv4/tcp_cubic.c
+++ b/net/ipv4/tcp_cubic.c
@@ -124,7 +124,7 @@ static inline void bictcp_hystart_reset(struct sock *sk)
ca->sample_cnt = 0;
}
-static void bictcp_init(struct sock *sk)
+static void cubictcp_init(struct sock *sk)
{
struct bictcp *ca = inet_csk_ca(sk);
@@ -137,7 +137,7 @@ static void bictcp_init(struct sock *sk)
tcp_sk(sk)->snd_ssthresh = initial_ssthresh;
}
-static void bictcp_cwnd_event(struct sock *sk, enum tcp_ca_event event)
+static void cubictcp_cwnd_event(struct sock *sk, enum tcp_ca_event event)
{
if (event == CA_EVENT_TX_START) {
struct bictcp *ca = inet_csk_ca(sk);
@@ -319,7 +319,7 @@ tcp_friendliness:
ca->cnt = max(ca->cnt, 2U);
}
-static void bictcp_cong_avoid(struct sock *sk, u32 ack, u32 acked)
+static void cubictcp_cong_avoid(struct sock *sk, u32 ack, u32 acked)
{
struct tcp_sock *tp = tcp_sk(sk);
struct bictcp *ca = inet_csk_ca(sk);
@@ -338,7 +338,7 @@ static void bictcp_cong_avoid(struct sock *sk, u32 ack, u32 acked)
tcp_cong_avoid_ai(tp, ca->cnt, acked);
}
-static u32 bictcp_recalc_ssthresh(struct sock *sk)
+static u32 cubictcp_recalc_ssthresh(struct sock *sk)
{
const struct tcp_sock *tp = tcp_sk(sk);
struct bictcp *ca = inet_csk_ca(sk);
@@ -355,7 +355,7 @@ static u32 bictcp_recalc_ssthresh(struct sock *sk)
return max((tp->snd_cwnd * beta) / BICTCP_BETA_SCALE, 2U);
}
-static void bictcp_state(struct sock *sk, u8 new_state)
+static void cubictcp_state(struct sock *sk, u8 new_state)
{
if (new_state == TCP_CA_Loss) {
bictcp_reset(inet_csk_ca(sk));
@@ -442,7 +442,7 @@ static void hystart_update(struct sock *sk, u32 delay)
}
}
-static void bictcp_acked(struct sock *sk, const struct ack_sample *sample)
+static void cubictcp_acked(struct sock *sk, const struct ack_sample *sample)
{
const struct tcp_sock *tp = tcp_sk(sk);
struct bictcp *ca = inet_csk_ca(sk);
@@ -471,13 +471,13 @@ static void bictcp_acked(struct sock *sk, const struct ack_sample *sample)
}
static struct tcp_congestion_ops cubictcp __read_mostly = {
- .init = bictcp_init,
- .ssthresh = bictcp_recalc_ssthresh,
- .cong_avoid = bictcp_cong_avoid,
- .set_state = bictcp_state,
+ .init = cubictcp_init,
+ .ssthresh = cubictcp_recalc_ssthresh,
+ .cong_avoid = cubictcp_cong_avoid,
+ .set_state = cubictcp_state,
.undo_cwnd = tcp_reno_undo_cwnd,
- .cwnd_event = bictcp_cwnd_event,
- .pkts_acked = bictcp_acked,
+ .cwnd_event = cubictcp_cwnd_event,
+ .pkts_acked = cubictcp_acked,
.owner = THIS_MODULE,
.name = "cubic",
};
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index daad4f99db32..dfc6d1c0e710 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -2806,6 +2806,9 @@ struct proto tcp_prot = {
.hash = inet_hash,
.unhash = inet_unhash,
.get_port = inet_csk_get_port,
+#ifdef CONFIG_BPF_SYSCALL
+ .psock_update_sk_prot = tcp_bpf_update_proto,
+#endif
.enter_memory_pressure = tcp_enter_memory_pressure,
.leave_memory_pressure = tcp_leave_memory_pressure,
.stream_memory_free = tcp_stream_memory_free,
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index c0695ce42dc5..bfcc7f1a8a7f 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -1782,6 +1782,35 @@ busy_check:
}
EXPORT_SYMBOL(__skb_recv_udp);
+int udp_read_sock(struct sock *sk, read_descriptor_t *desc,
+ sk_read_actor_t recv_actor)
+{
+ int copied = 0;
+
+ while (1) {
+ struct sk_buff *skb;
+ int err, used;
+
+ skb = skb_recv_udp(sk, 0, 1, &err);
+ if (!skb)
+ return err;
+ used = recv_actor(desc, skb, 0, skb->len);
+ if (used <= 0) {
+ if (!copied)
+ copied = used;
+ break;
+ } else if (used <= skb->len) {
+ copied += used;
+ }
+
+ if (!desc->count)
+ break;
+ }
+
+ return copied;
+}
+EXPORT_SYMBOL(udp_read_sock);
+
/*
* This should be easy, if there is something there we
* return it, otherwise we block.
@@ -2854,6 +2883,9 @@ struct proto udp_prot = {
.unhash = udp_lib_unhash,
.rehash = udp_v4_rehash,
.get_port = udp_v4_get_port,
+#ifdef CONFIG_BPF_SYSCALL
+ .psock_update_sk_prot = udp_bpf_update_proto,
+#endif
.memory_allocated = &udp_memory_allocated,
.sysctl_mem = sysctl_udp_mem,
.sysctl_wmem_offset = offsetof(struct net, ipv4.sysctl_udp_wmem_min),
diff --git a/net/ipv4/udp_bpf.c b/net/ipv4/udp_bpf.c
index 7a94791efc1a..7d5c4ebf42fe 100644
--- a/net/ipv4/udp_bpf.c
+++ b/net/ipv4/udp_bpf.c
@@ -4,6 +4,68 @@
#include <linux/skmsg.h>
#include <net/sock.h>
#include <net/udp.h>
+#include <net/inet_common.h>
+
+#include "udp_impl.h"
+
+static struct proto *udpv6_prot_saved __read_mostly;
+
+static int sk_udp_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
+ int noblock, int flags, int *addr_len)
+{
+#if IS_ENABLED(CONFIG_IPV6)
+ if (sk->sk_family == AF_INET6)
+ return udpv6_prot_saved->recvmsg(sk, msg, len, noblock, flags,
+ addr_len);
+#endif
+ return udp_prot.recvmsg(sk, msg, len, noblock, flags, addr_len);
+}
+
+static int udp_bpf_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
+ int nonblock, int flags, int *addr_len)
+{
+ struct sk_psock *psock;
+ int copied, ret;
+
+ if (unlikely(flags & MSG_ERRQUEUE))
+ return inet_recv_error(sk, msg, len, addr_len);
+
+ psock = sk_psock_get(sk);
+ if (unlikely(!psock))
+ return sk_udp_recvmsg(sk, msg, len, nonblock, flags, addr_len);
+
+ lock_sock(sk);
+ if (sk_psock_queue_empty(psock)) {
+ ret = sk_udp_recvmsg(sk, msg, len, nonblock, flags, addr_len);
+ goto out;
+ }
+
+msg_bytes_ready:
+ copied = sk_msg_recvmsg(sk, psock, msg, len, flags);
+ if (!copied) {
+ int data, err = 0;
+ long timeo;
+
+ timeo = sock_rcvtimeo(sk, nonblock);
+ data = sk_msg_wait_data(sk, psock, flags, timeo, &err);
+ if (data) {
+ if (!sk_psock_queue_empty(psock))
+ goto msg_bytes_ready;
+ ret = sk_udp_recvmsg(sk, msg, len, nonblock, flags, addr_len);
+ goto out;
+ }
+ if (err) {
+ ret = err;
+ goto out;
+ }
+ copied = -EAGAIN;
+ }
+ ret = copied;
+out:
+ release_sock(sk);
+ sk_psock_put(sk, psock);
+ return ret;
+}
enum {
UDP_BPF_IPV4,
@@ -11,7 +73,6 @@ enum {
UDP_BPF_NUM_PROTS,
};
-static struct proto *udpv6_prot_saved __read_mostly;
static DEFINE_SPINLOCK(udpv6_prot_lock);
static struct proto udp_bpf_prots[UDP_BPF_NUM_PROTS];
@@ -20,6 +81,7 @@ static void udp_bpf_rebuild_protos(struct proto *prot, const struct proto *base)
*prot = *base;
prot->unhash = sock_map_unhash;
prot->close = sock_map_close;
+ prot->recvmsg = udp_bpf_recvmsg;
}
static void udp_bpf_check_v6_needs_rebuild(struct proto *ops)
@@ -41,12 +103,23 @@ static int __init udp_bpf_v4_build_proto(void)
}
core_initcall(udp_bpf_v4_build_proto);
-struct proto *udp_bpf_get_proto(struct sock *sk, struct sk_psock *psock)
+int udp_bpf_update_proto(struct sock *sk, bool restore)
{
int family = sk->sk_family == AF_INET ? UDP_BPF_IPV4 : UDP_BPF_IPV6;
+ struct sk_psock *psock = sk_psock(sk);
+
+ if (restore) {
+ sk->sk_write_space = psock->saved_write_space;
+ /* Pairs with lockless read in sk_clone_lock() */
+ WRITE_ONCE(sk->sk_prot, psock->sk_proto);
+ return 0;
+ }
if (sk->sk_family == AF_INET6)
udp_bpf_check_v6_needs_rebuild(psock->sk_proto);
- return &udp_bpf_prots[family];
+ /* Pairs with lockless read in sk_clone_lock() */
+ WRITE_ONCE(sk->sk_prot, &udp_bpf_prots[family]);
+ return 0;
}
+EXPORT_SYMBOL_GPL(udp_bpf_update_proto);
generated by cgit v1.2.3 (git 2.39.1) at 2024-10-10 07:37:12 +0000