diff options
author | Martin KaFai Lau <martin.lau@kernel.org> | 2022-09-02 03:28:15 +0300 |
---|---|---|
committer | Alexei Starovoitov <ast@kernel.org> | 2022-09-03 06:34:30 +0300 |
commit | 34704ef024ae6167c7ae9e67f671eb6bc1962c90 (patch) | |
tree | 9c429286709886721231623a0857cf6b2ce6d475 /net/ipv4 | |
parent | 2c5b6bf5cda048af896bb0e12a956783f7d6c835 (diff) | |
download | linux-34704ef024ae6167c7ae9e67f671eb6bc1962c90.tar.xz |
bpf: net: Change do_tcp_getsockopt() to take the sockptr_t argument
Similar to the earlier patch that changes sk_getsockopt() to
take the sockptr_t argument . This patch also changes
do_tcp_getsockopt() to take the sockptr_t argument such that
a latter patch can make bpf_getsockopt(SOL_TCP) to reuse
do_tcp_getsockopt().
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Link: https://lore.kernel.org/r/20220902002815.2889332-1-kafai@fb.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'net/ipv4')
-rw-r--r-- | net/ipv4/tcp.c | 72 |
1 files changed, 37 insertions, 35 deletions
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index f0d79ea45ac8..108c430a2a11 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -4044,14 +4044,14 @@ struct sk_buff *tcp_get_timestamping_opt_stats(const struct sock *sk, } static int do_tcp_getsockopt(struct sock *sk, int level, - int optname, char __user *optval, int __user *optlen) + int optname, sockptr_t optval, sockptr_t optlen) { struct inet_connection_sock *icsk = inet_csk(sk); struct tcp_sock *tp = tcp_sk(sk); struct net *net = sock_net(sk); int val, len; - if (get_user(len, optlen)) + if (copy_from_sockptr(&len, optlen, sizeof(int))) return -EFAULT; len = min_t(unsigned int, len, sizeof(int)); @@ -4101,15 +4101,15 @@ static int do_tcp_getsockopt(struct sock *sk, int level, case TCP_INFO: { struct tcp_info info; - if (get_user(len, optlen)) + if (copy_from_sockptr(&len, optlen, sizeof(int))) return -EFAULT; tcp_get_info(sk, &info); len = min_t(unsigned int, len, sizeof(info)); - if (put_user(len, optlen)) + if (copy_to_sockptr(optlen, &len, sizeof(int))) return -EFAULT; - if (copy_to_user(optval, &info, len)) + if (copy_to_sockptr(optval, &info, len)) return -EFAULT; return 0; } @@ -4119,7 +4119,7 @@ static int do_tcp_getsockopt(struct sock *sk, int level, size_t sz = 0; int attr; - if (get_user(len, optlen)) + if (copy_from_sockptr(&len, optlen, sizeof(int))) return -EFAULT; ca_ops = icsk->icsk_ca_ops; @@ -4127,9 +4127,9 @@ static int do_tcp_getsockopt(struct sock *sk, int level, sz = ca_ops->get_info(sk, ~0U, &attr, &info); len = min_t(unsigned int, len, sz); - if (put_user(len, optlen)) + if (copy_to_sockptr(optlen, &len, sizeof(int))) return -EFAULT; - if (copy_to_user(optval, &info, len)) + if (copy_to_sockptr(optval, &info, len)) return -EFAULT; return 0; } @@ -4138,27 +4138,28 @@ static int do_tcp_getsockopt(struct sock *sk, int level, break; case TCP_CONGESTION: - if (get_user(len, optlen)) + if (copy_from_sockptr(&len, optlen, sizeof(int))) return -EFAULT; len = min_t(unsigned int, len, TCP_CA_NAME_MAX); - if (put_user(len, optlen)) + if (copy_to_sockptr(optlen, &len, sizeof(int))) return -EFAULT; - if (copy_to_user(optval, icsk->icsk_ca_ops->name, len)) + if (copy_to_sockptr(optval, icsk->icsk_ca_ops->name, len)) return -EFAULT; return 0; case TCP_ULP: - if (get_user(len, optlen)) + if (copy_from_sockptr(&len, optlen, sizeof(int))) return -EFAULT; len = min_t(unsigned int, len, TCP_ULP_NAME_MAX); if (!icsk->icsk_ulp_ops) { - if (put_user(0, optlen)) + len = 0; + if (copy_to_sockptr(optlen, &len, sizeof(int))) return -EFAULT; return 0; } - if (put_user(len, optlen)) + if (copy_to_sockptr(optlen, &len, sizeof(int))) return -EFAULT; - if (copy_to_user(optval, icsk->icsk_ulp_ops->name, len)) + if (copy_to_sockptr(optval, icsk->icsk_ulp_ops->name, len)) return -EFAULT; return 0; @@ -4166,15 +4167,15 @@ static int do_tcp_getsockopt(struct sock *sk, int level, u64 key[TCP_FASTOPEN_KEY_BUF_LENGTH / sizeof(u64)]; unsigned int key_len; - if (get_user(len, optlen)) + if (copy_from_sockptr(&len, optlen, sizeof(int))) return -EFAULT; key_len = tcp_fastopen_get_cipher(net, icsk, key) * TCP_FASTOPEN_KEY_LENGTH; len = min_t(unsigned int, len, key_len); - if (put_user(len, optlen)) + if (copy_to_sockptr(optlen, &len, sizeof(int))) return -EFAULT; - if (copy_to_user(optval, key, len)) + if (copy_to_sockptr(optval, key, len)) return -EFAULT; return 0; } @@ -4200,7 +4201,7 @@ static int do_tcp_getsockopt(struct sock *sk, int level, case TCP_REPAIR_WINDOW: { struct tcp_repair_window opt; - if (get_user(len, optlen)) + if (copy_from_sockptr(&len, optlen, sizeof(int))) return -EFAULT; if (len != sizeof(opt)) @@ -4215,7 +4216,7 @@ static int do_tcp_getsockopt(struct sock *sk, int level, opt.rcv_wnd = tp->rcv_wnd; opt.rcv_wup = tp->rcv_wup; - if (copy_to_user(optval, &opt, len)) + if (copy_to_sockptr(optval, &opt, len)) return -EFAULT; return 0; } @@ -4261,14 +4262,14 @@ static int do_tcp_getsockopt(struct sock *sk, int level, val = tp->save_syn; break; case TCP_SAVED_SYN: { - if (get_user(len, optlen)) + if (copy_from_sockptr(&len, optlen, sizeof(int))) return -EFAULT; lock_sock(sk); if (tp->saved_syn) { if (len < tcp_saved_syn_len(tp->saved_syn)) { - if (put_user(tcp_saved_syn_len(tp->saved_syn), - optlen)) { + len = tcp_saved_syn_len(tp->saved_syn); + if (copy_to_sockptr(optlen, &len, sizeof(int))) { release_sock(sk); return -EFAULT; } @@ -4276,11 +4277,11 @@ static int do_tcp_getsockopt(struct sock *sk, int level, return -EINVAL; } len = tcp_saved_syn_len(tp->saved_syn); - if (put_user(len, optlen)) { + if (copy_to_sockptr(optlen, &len, sizeof(int))) { release_sock(sk); return -EFAULT; } - if (copy_to_user(optval, tp->saved_syn->data, len)) { + if (copy_to_sockptr(optval, tp->saved_syn->data, len)) { release_sock(sk); return -EFAULT; } @@ -4289,7 +4290,7 @@ static int do_tcp_getsockopt(struct sock *sk, int level, } else { release_sock(sk); len = 0; - if (put_user(len, optlen)) + if (copy_to_sockptr(optlen, &len, sizeof(int))) return -EFAULT; } return 0; @@ -4300,21 +4301,21 @@ static int do_tcp_getsockopt(struct sock *sk, int level, struct tcp_zerocopy_receive zc = {}; int err; - if (get_user(len, optlen)) + if (copy_from_sockptr(&len, optlen, sizeof(int))) return -EFAULT; if (len < 0 || len < offsetofend(struct tcp_zerocopy_receive, length)) return -EINVAL; if (unlikely(len > sizeof(zc))) { - err = check_zeroed_user(optval + sizeof(zc), - len - sizeof(zc)); + err = check_zeroed_sockptr(optval, sizeof(zc), + len - sizeof(zc)); if (err < 1) return err == 0 ? -EINVAL : err; len = sizeof(zc); - if (put_user(len, optlen)) + if (copy_to_sockptr(optlen, &len, sizeof(int))) return -EFAULT; } - if (copy_from_user(&zc, optval, len)) + if (copy_from_sockptr(&zc, optval, len)) return -EFAULT; if (zc.reserved) return -EINVAL; @@ -4354,7 +4355,7 @@ zerocopy_rcv_sk_err: zerocopy_rcv_inq: zc.inq = tcp_inq_hint(sk); zerocopy_rcv_out: - if (!err && copy_to_user(optval, &zc, len)) + if (!err && copy_to_sockptr(optval, &zc, len)) err = -EFAULT; return err; } @@ -4363,9 +4364,9 @@ zerocopy_rcv_out: return -ENOPROTOOPT; } - if (put_user(len, optlen)) + if (copy_to_sockptr(optlen, &len, sizeof(int))) return -EFAULT; - if (copy_to_user(optval, &val, len)) + if (copy_to_sockptr(optval, &val, len)) return -EFAULT; return 0; } @@ -4390,7 +4391,8 @@ int tcp_getsockopt(struct sock *sk, int level, int optname, char __user *optval, if (level != SOL_TCP) return icsk->icsk_af_ops->getsockopt(sk, level, optname, optval, optlen); - return do_tcp_getsockopt(sk, level, optname, optval, optlen); + return do_tcp_getsockopt(sk, level, optname, USER_SOCKPTR(optval), + USER_SOCKPTR(optlen)); } EXPORT_SYMBOL(tcp_getsockopt); |