diff options
author | Al Viro <viro@zeniv.linux.org.uk> | 2014-11-24 16:42:55 +0100 |
---|---|---|
committer | Al Viro <viro@zeniv.linux.org.uk> | 2014-12-09 22:29:03 +0100 |
commit | c0371da6047abd261bc483c744dbc7d81a116172 (patch) | |
tree | 73b4d685f311a83e04f3a684ce18225b409b3f5f /net | |
parent | vmci: propagate msghdr all way down to __qp_memcpy_from_queue() (diff) | |
download | linux-c0371da6047abd261bc483c744dbc7d81a116172.tar.xz linux-c0371da6047abd261bc483c744dbc7d81a116172.zip |
put iov_iter into msghdr
Note that the code _using_ ->msg_iter at that point will be very
unhappy with anything other than unshifted iovec-backed iov_iter.
We still need to convert users to proper primitives.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'net')
-rw-r--r-- | net/atm/common.c | 5 | ||||
-rw-r--r-- | net/bluetooth/6lowpan.c | 6 | ||||
-rw-r--r-- | net/bluetooth/a2mp.c | 3 | ||||
-rw-r--r-- | net/bluetooth/smp.c | 3 | ||||
-rw-r--r-- | net/caif/caif_socket.c | 2 | ||||
-rw-r--r-- | net/compat.c | 10 | ||||
-rw-r--r-- | net/ipv4/ip_output.c | 6 | ||||
-rw-r--r-- | net/ipv4/ping.c | 3 | ||||
-rw-r--r-- | net/ipv4/raw.c | 3 | ||||
-rw-r--r-- | net/ipv4/tcp.c | 6 | ||||
-rw-r--r-- | net/ipv4/tcp_output.c | 2 | ||||
-rw-r--r-- | net/ipv6/ping.c | 3 | ||||
-rw-r--r-- | net/ipv6/raw.c | 3 | ||||
-rw-r--r-- | net/netlink/af_netlink.c | 2 | ||||
-rw-r--r-- | net/packet/af_packet.c | 7 | ||||
-rw-r--r-- | net/rds/recv.c | 7 | ||||
-rw-r--r-- | net/rds/send.c | 4 | ||||
-rw-r--r-- | net/rxrpc/ar-output.c | 8 | ||||
-rw-r--r-- | net/sctp/socket.c | 5 | ||||
-rw-r--r-- | net/socket.c | 27 | ||||
-rw-r--r-- | net/tipc/msg.c | 4 | ||||
-rw-r--r-- | net/unix/af_unix.c | 10 | ||||
-rw-r--r-- | net/vmw_vsock/vmci_transport.c | 3 |
23 files changed, 59 insertions, 73 deletions
diff --git a/net/atm/common.c b/net/atm/common.c index f59112944c91..b84057e41bd6 100644 --- a/net/atm/common.c +++ b/net/atm/common.c @@ -577,9 +577,6 @@ int vcc_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *m, struct atm_vcc *vcc; struct sk_buff *skb; int eff, error; - struct iov_iter from; - - iov_iter_init(&from, WRITE, m->msg_iov, m->msg_iovlen, size); lock_sock(sk); if (sock->state != SS_CONNECTED) { @@ -634,7 +631,7 @@ int vcc_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *m, goto out; skb->dev = NULL; /* for paths shared with net_device interfaces */ ATM_SKB(skb)->atm_options = vcc->atm_options; - if (copy_from_iter(skb_put(skb, size), size, &from) != size) { + if (copy_from_iter(skb_put(skb, size), size, &m->msg_iter) != size) { kfree_skb(skb); error = -EFAULT; goto out; diff --git a/net/bluetooth/6lowpan.c b/net/bluetooth/6lowpan.c index bdcaefd2db12..d8c67a5e7a02 100644 --- a/net/bluetooth/6lowpan.c +++ b/net/bluetooth/6lowpan.c @@ -537,12 +537,12 @@ static int send_pkt(struct l2cap_chan *chan, struct sk_buff *skb, */ chan->data = skb; - memset(&msg, 0, sizeof(msg)); - msg.msg_iov = (struct iovec *) &iv; - msg.msg_iovlen = 1; iv.iov_base = skb->data; iv.iov_len = skb->len; + memset(&msg, 0, sizeof(msg)); + iov_iter_init(&msg.msg_iter, WRITE, (struct iovec *) &iv, 1, skb->len); + err = l2cap_chan_send(chan, &msg, skb->len); if (err > 0) { netdev->stats.tx_bytes += err; diff --git a/net/bluetooth/a2mp.c b/net/bluetooth/a2mp.c index 5dcade511fdb..716d2a388858 100644 --- a/net/bluetooth/a2mp.c +++ b/net/bluetooth/a2mp.c @@ -60,8 +60,7 @@ void a2mp_send(struct amp_mgr *mgr, u8 code, u8 ident, u16 len, void *data) memset(&msg, 0, sizeof(msg)); - msg.msg_iov = (struct iovec *) &iv; - msg.msg_iovlen = 1; + iov_iter_init(&msg.msg_iter, WRITE, (struct iovec *)&iv, 1, total_len); l2cap_chan_send(chan, &msg, total_len); diff --git a/net/bluetooth/smp.c b/net/bluetooth/smp.c index 069b76e03b57..21f555b4df17 100644 --- a/net/bluetooth/smp.c +++ b/net/bluetooth/smp.c @@ -268,8 +268,7 @@ static void smp_send_cmd(struct l2cap_conn *conn, u8 code, u16 len, void *data) memset(&msg, 0, sizeof(msg)); - msg.msg_iov = (struct iovec *) &iv; - msg.msg_iovlen = 2; + iov_iter_init(&msg.msg_iter, WRITE, (struct iovec *)iv, 2, 1 + len); l2cap_chan_send(chan, &msg, 1 + len); diff --git a/net/caif/caif_socket.c b/net/caif/caif_socket.c index ac618b0b8a4f..769b185fefbd 100644 --- a/net/caif/caif_socket.c +++ b/net/caif/caif_socket.c @@ -535,7 +535,7 @@ static int caif_seqpkt_sendmsg(struct kiocb *kiocb, struct socket *sock, goto err; ret = -EINVAL; - if (unlikely(msg->msg_iov->iov_base == NULL)) + if (unlikely(msg->msg_iter.iov->iov_base == NULL)) goto err; noblock = msg->msg_flags & MSG_DONTWAIT; diff --git a/net/compat.c b/net/compat.c index 062f157d2a6b..3236b4167a32 100644 --- a/net/compat.c +++ b/net/compat.c @@ -37,13 +37,14 @@ ssize_t get_compat_msghdr(struct msghdr *kmsg, struct iovec **iov) { compat_uptr_t uaddr, uiov, tmp3; + compat_size_t nr_segs; ssize_t err; if (!access_ok(VERIFY_READ, umsg, sizeof(*umsg)) || __get_user(uaddr, &umsg->msg_name) || __get_user(kmsg->msg_namelen, &umsg->msg_namelen) || __get_user(uiov, &umsg->msg_iov) || - __get_user(kmsg->msg_iovlen, &umsg->msg_iovlen) || + __get_user(nr_segs, &umsg->msg_iovlen) || __get_user(tmp3, &umsg->msg_control) || __get_user(kmsg->msg_controllen, &umsg->msg_controllen) || __get_user(kmsg->msg_flags, &umsg->msg_flags)) @@ -68,14 +69,15 @@ ssize_t get_compat_msghdr(struct msghdr *kmsg, kmsg->msg_namelen = 0; } - if (kmsg->msg_iovlen > UIO_MAXIOV) + if (nr_segs > UIO_MAXIOV) return -EMSGSIZE; err = compat_rw_copy_check_uvector(save_addr ? READ : WRITE, - compat_ptr(uiov), kmsg->msg_iovlen, + compat_ptr(uiov), nr_segs, UIO_FASTIOV, *iov, iov); if (err >= 0) - kmsg->msg_iov = *iov; + iov_iter_init(&kmsg->msg_iter, save_addr ? READ : WRITE, + *iov, nr_segs, err); return err; } diff --git a/net/ipv4/ip_output.c b/net/ipv4/ip_output.c index cdedcf144463..b50861b22b6b 100644 --- a/net/ipv4/ip_output.c +++ b/net/ipv4/ip_output.c @@ -755,11 +755,13 @@ ip_generic_getfrag(void *from, char *to, int offset, int len, int odd, struct sk struct msghdr *msg = from; if (skb->ip_summed == CHECKSUM_PARTIAL) { - if (memcpy_fromiovecend(to, msg->msg_iov, offset, len) < 0) + /* XXX: stripping const */ + if (memcpy_fromiovecend(to, (struct iovec *)msg->msg_iter.iov, offset, len) < 0) return -EFAULT; } else { __wsum csum = 0; - if (csum_partial_copy_fromiovecend(to, msg->msg_iov, offset, len, &csum) < 0) + /* XXX: stripping const */ + if (csum_partial_copy_fromiovecend(to, (struct iovec *)msg->msg_iter.iov, offset, len, &csum) < 0) return -EFAULT; skb->csum = csum_block_add(skb->csum, csum, odd); } diff --git a/net/ipv4/ping.c b/net/ipv4/ping.c index 8dd4ae0424fc..c0d82f78d364 100644 --- a/net/ipv4/ping.c +++ b/net/ipv4/ping.c @@ -811,7 +811,8 @@ back_from_confirm: pfh.icmph.checksum = 0; pfh.icmph.un.echo.id = inet->inet_sport; pfh.icmph.un.echo.sequence = user_icmph.un.echo.sequence; - pfh.iov = msg->msg_iov; + /* XXX: stripping const */ + pfh.iov = (struct iovec *)msg->msg_iter.iov; pfh.wcheck = 0; pfh.family = AF_INET; diff --git a/net/ipv4/raw.c b/net/ipv4/raw.c index 5d83bd2fcedb..0bb68df5055d 100644 --- a/net/ipv4/raw.c +++ b/net/ipv4/raw.c @@ -625,7 +625,8 @@ static int raw_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, back_from_confirm: if (inet->hdrincl) - err = raw_send_hdrinc(sk, &fl4, msg->msg_iov, len, + /* XXX: stripping const */ + err = raw_send_hdrinc(sk, &fl4, (struct iovec *)msg->msg_iter.iov, len, &rt, msg->msg_flags); else { diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c index 4a96f3730170..54ba6209eea9 100644 --- a/net/ipv4/tcp.c +++ b/net/ipv4/tcp.c @@ -1085,7 +1085,7 @@ static int tcp_sendmsg_fastopen(struct sock *sk, struct msghdr *msg, int tcp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, size_t size) { - struct iovec *iov; + const struct iovec *iov; struct tcp_sock *tp = tcp_sk(sk); struct sk_buff *skb; int iovlen, flags, err, copied = 0; @@ -1136,8 +1136,8 @@ int tcp_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, mss_now = tcp_send_mss(sk, &size_goal, flags); /* Ok commence sending. */ - iovlen = msg->msg_iovlen; - iov = msg->msg_iov; + iovlen = msg->msg_iter.nr_segs; + iov = msg->msg_iter.iov; copied = 0; err = -EPIPE; diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c index f5bd4bd3f7e6..3e225b03eb95 100644 --- a/net/ipv4/tcp_output.c +++ b/net/ipv4/tcp_output.c @@ -3050,7 +3050,7 @@ static int tcp_send_syn_data(struct sock *sk, struct sk_buff *syn) syn_data->ip_summed = CHECKSUM_PARTIAL; memcpy(syn_data->cb, syn->cb, sizeof(syn->cb)); if (unlikely(memcpy_fromiovecend(skb_put(syn_data, space), - fo->data->msg_iov, 0, space))) { + fo->data->msg_iter.iov, 0, space))) { kfree_skb(syn_data); goto fallback; } diff --git a/net/ipv6/ping.c b/net/ipv6/ping.c index 5b7a1ed2aba9..2d3148378a1f 100644 --- a/net/ipv6/ping.c +++ b/net/ipv6/ping.c @@ -163,7 +163,8 @@ int ping_v6_sendmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg, pfh.icmph.checksum = 0; pfh.icmph.un.echo.id = inet->inet_sport; pfh.icmph.un.echo.sequence = user_icmph.icmp6_sequence; - pfh.iov = msg->msg_iov; + /* XXX: stripping const */ + pfh.iov = (struct iovec *)msg->msg_iter.iov; pfh.wcheck = 0; pfh.family = AF_INET6; diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c index 11a9283fda51..ee25631f8c29 100644 --- a/net/ipv6/raw.c +++ b/net/ipv6/raw.c @@ -886,7 +886,8 @@ static int rawv6_sendmsg(struct kiocb *iocb, struct sock *sk, back_from_confirm: if (inet->hdrincl) - err = rawv6_send_hdrinc(sk, msg->msg_iov, len, &fl6, &dst, msg->msg_flags); + /* XXX: stripping const */ + err = rawv6_send_hdrinc(sk, (struct iovec *)msg->msg_iter.iov, len, &fl6, &dst, msg->msg_flags); else { lock_sock(sk); err = ip6_append_data(sk, raw6_getfrag, &rfv, diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c index 63aa5c8acf12..cc9bcf008b03 100644 --- a/net/netlink/af_netlink.c +++ b/net/netlink/af_netlink.c @@ -2305,7 +2305,7 @@ static int netlink_sendmsg(struct kiocb *kiocb, struct socket *sock, } if (netlink_tx_is_mmaped(sk) && - msg->msg_iov->iov_base == NULL) { + msg->msg_iter.iov->iov_base == NULL) { err = netlink_mmap_sendmsg(sk, msg, dst_portid, dst_group, siocb); goto out; diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c index efa844501136..ed2e620b61df 100644 --- a/net/packet/af_packet.c +++ b/net/packet/af_packet.c @@ -2408,11 +2408,8 @@ static int packet_snd(struct socket *sock, struct msghdr *msg, size_t len) unsigned short gso_type = 0; int hlen, tlen; int extra_len = 0; - struct iov_iter from; ssize_t n; - iov_iter_init(&from, WRITE, msg->msg_iov, msg->msg_iovlen, len); - /* * Get and verify the address. */ @@ -2451,7 +2448,7 @@ static int packet_snd(struct socket *sock, struct msghdr *msg, size_t len) len -= vnet_hdr_len; err = -EFAULT; - n = copy_from_iter(&vnet_hdr, vnet_hdr_len, &from); + n = copy_from_iter(&vnet_hdr, vnet_hdr_len, &msg->msg_iter); if (n != vnet_hdr_len) goto out_unlock; @@ -2522,7 +2519,7 @@ static int packet_snd(struct socket *sock, struct msghdr *msg, size_t len) } /* Returns -EFAULT on error */ - err = skb_copy_datagram_from_iter(skb, offset, &from, len); + err = skb_copy_datagram_from_iter(skb, offset, &msg->msg_iter, len); if (err) goto out_free; diff --git a/net/rds/recv.c b/net/rds/recv.c index 47d7b1029b33..f9ec1acd801c 100644 --- a/net/rds/recv.c +++ b/net/rds/recv.c @@ -404,7 +404,6 @@ int rds_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, int ret = 0, nonblock = msg_flags & MSG_DONTWAIT; DECLARE_SOCKADDR(struct sockaddr_in *, sin, msg->msg_name); struct rds_incoming *inc = NULL; - struct iov_iter to; /* udp_recvmsg()->sock_recvtimeo() gets away without locking too.. */ timeo = sock_rcvtimeo(sk, nonblock); @@ -415,6 +414,7 @@ int rds_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, goto out; while (1) { + struct iov_iter save; /* If there are pending notifications, do those - and nothing else */ if (!list_empty(&rs->rs_notify_queue)) { ret = rds_notify_queue_get(rs, msg); @@ -450,8 +450,8 @@ int rds_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, rdsdebug("copying inc %p from %pI4:%u to user\n", inc, &inc->i_conn->c_faddr, ntohs(inc->i_hdr.h_sport)); - iov_iter_init(&to, READ, msg->msg_iov, msg->msg_iovlen, size); - ret = inc->i_conn->c_trans->inc_copy_to_user(inc, &to); + save = msg->msg_iter; + ret = inc->i_conn->c_trans->inc_copy_to_user(inc, &msg->msg_iter); if (ret < 0) break; @@ -464,6 +464,7 @@ int rds_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, rds_inc_put(inc); inc = NULL; rds_stats_inc(s_recv_deliver_raced); + msg->msg_iter = save; continue; } diff --git a/net/rds/send.c b/net/rds/send.c index 4de62ead1c71..40a5629a0a13 100644 --- a/net/rds/send.c +++ b/net/rds/send.c @@ -934,9 +934,7 @@ int rds_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, int queued = 0, allocated_mr = 0; int nonblock = msg->msg_flags & MSG_DONTWAIT; long timeo = sock_sndtimeo(sk, nonblock); - struct iov_iter from; - iov_iter_init(&from, WRITE, msg->msg_iov, msg->msg_iovlen, payload_len); /* Mirror Linux UDP mirror of BSD error message compatibility */ /* XXX: Perhaps MSG_MORE someday */ if (msg->msg_flags & ~(MSG_DONTWAIT | MSG_CMSG_COMPAT)) { @@ -984,7 +982,7 @@ int rds_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, ret = -ENOMEM; goto out; } - ret = rds_message_copy_from_user(rm, &from); + ret = rds_message_copy_from_user(rm, &msg->msg_iter); if (ret) goto out; } diff --git a/net/rxrpc/ar-output.c b/net/rxrpc/ar-output.c index 0b4b9a79f5ab..86e0f10aa2c0 100644 --- a/net/rxrpc/ar-output.c +++ b/net/rxrpc/ar-output.c @@ -531,14 +531,12 @@ static int rxrpc_send_data(struct kiocb *iocb, struct rxrpc_skb_priv *sp; unsigned char __user *from; struct sk_buff *skb; - struct iovec *iov; + const struct iovec *iov; struct sock *sk = &rx->sk; long timeo; bool more; int ret, ioc, segment, copied; - _enter(",,,{%zu},%zu", msg->msg_iovlen, len); - timeo = sock_sndtimeo(sk, msg->msg_flags & MSG_DONTWAIT); /* this should be in poll */ @@ -547,8 +545,8 @@ static int rxrpc_send_data(struct kiocb *iocb, if (sk->sk_err || (sk->sk_shutdown & SEND_SHUTDOWN)) return -EPIPE; - iov = msg->msg_iov; - ioc = msg->msg_iovlen - 1; + iov = msg->msg_iter.iov; + ioc = msg->msg_iter.nr_segs - 1; from = iov->iov_base; segment = iov->iov_len; iov++; diff --git a/net/sctp/socket.c b/net/sctp/socket.c index 0397ac9fd98c..c92f96cda699 100644 --- a/net/sctp/socket.c +++ b/net/sctp/socket.c @@ -1609,9 +1609,6 @@ static int sctp_sendmsg(struct kiocb *iocb, struct sock *sk, __u16 sinfo_flags = 0; long timeo; int err; - struct iov_iter from; - - iov_iter_init(&from, WRITE, msg->msg_iov, msg->msg_iovlen, msg_len); err = 0; sp = sctp_sk(sk); @@ -1950,7 +1947,7 @@ static int sctp_sendmsg(struct kiocb *iocb, struct sock *sk, } /* Break the message into multiple chunks of maximum size. */ - datamsg = sctp_datamsg_from_user(asoc, sinfo, &from); + datamsg = sctp_datamsg_from_user(asoc, sinfo, &msg->msg_iter); if (IS_ERR(datamsg)) { err = PTR_ERR(datamsg); goto out_free; diff --git a/net/socket.c b/net/socket.c index f676ac4a3701..8809afccf7fa 100644 --- a/net/socket.c +++ b/net/socket.c @@ -689,8 +689,7 @@ int kernel_sendmsg(struct socket *sock, struct msghdr *msg, * the following is safe, since for compiler definitions of kvec and * iovec are identical, yielding the same in-core layout and alignment */ - msg->msg_iov = (struct iovec *)vec; - msg->msg_iovlen = num; + iov_iter_init(&msg->msg_iter, WRITE, (struct iovec *)vec, num, size); result = sock_sendmsg(sock, msg, size); set_fs(oldfs); return result; @@ -853,7 +852,7 @@ int kernel_recvmsg(struct socket *sock, struct msghdr *msg, * the following is safe, since for compiler definitions of kvec and * iovec are identical, yielding the same in-core layout and alignment */ - msg->msg_iov = (struct iovec *)vec, msg->msg_iovlen = num; + iov_iter_init(&msg->msg_iter, READ, (struct iovec *)vec, num, size); result = sock_recvmsg(sock, msg, size, flags); set_fs(oldfs); return result; @@ -913,8 +912,7 @@ static ssize_t do_sock_read(struct msghdr *msg, struct kiocb *iocb, msg->msg_namelen = 0; msg->msg_control = NULL; msg->msg_controllen = 0; - msg->msg_iov = (struct iovec *)iov; - msg->msg_iovlen = nr_segs; + iov_iter_init(&msg->msg_iter, READ, iov, nr_segs, size); msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; return __sock_recvmsg(iocb, sock, msg, size, msg->msg_flags); @@ -953,8 +951,7 @@ static ssize_t do_sock_write(struct msghdr *msg, struct kiocb *iocb, msg->msg_namelen = 0; msg->msg_control = NULL; msg->msg_controllen = 0; - msg->msg_iov = (struct iovec *)iov; - msg->msg_iovlen = nr_segs; + iov_iter_init(&msg->msg_iter, WRITE, iov, nr_segs, size); msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; if (sock->type == SOCK_SEQPACKET) msg->msg_flags |= MSG_EOR; @@ -1798,8 +1795,7 @@ SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len, iov.iov_base = buff; iov.iov_len = len; msg.msg_name = NULL; - msg.msg_iov = &iov; - msg.msg_iovlen = 1; + iov_iter_init(&msg.msg_iter, WRITE, &iov, 1, len); msg.msg_control = NULL; msg.msg_controllen = 0; msg.msg_namelen = 0; @@ -1856,10 +1852,9 @@ SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size, msg.msg_control = NULL; msg.msg_controllen = 0; - msg.msg_iovlen = 1; - msg.msg_iov = &iov; iov.iov_len = size; iov.iov_base = ubuf; + iov_iter_init(&msg.msg_iter, READ, &iov, 1, size); /* Save some cycles and don't copy the address if not needed */ msg.msg_name = addr ? (struct sockaddr *)&address : NULL; /* We assume all kernel code knows the size of sockaddr_storage */ @@ -1993,13 +1988,14 @@ static ssize_t copy_msghdr_from_user(struct msghdr *kmsg, { struct sockaddr __user *uaddr; struct iovec __user *uiov; + size_t nr_segs; ssize_t err; if (!access_ok(VERIFY_READ, umsg, sizeof(*umsg)) || __get_user(uaddr, &umsg->msg_name) || __get_user(kmsg->msg_namelen, &umsg->msg_namelen) || __get_user(uiov, &umsg->msg_iov) || - __get_user(kmsg->msg_iovlen, &umsg->msg_iovlen) || + __get_user(nr_segs, &umsg->msg_iovlen) || __get_user(kmsg->msg_control, &umsg->msg_control) || __get_user(kmsg->msg_controllen, &umsg->msg_controllen) || __get_user(kmsg->msg_flags, &umsg->msg_flags)) @@ -2029,14 +2025,15 @@ static ssize_t copy_msghdr_from_user(struct msghdr *kmsg, kmsg->msg_namelen = 0; } - if (kmsg->msg_iovlen > UIO_MAXIOV) + if (nr_segs > UIO_MAXIOV) return -EMSGSIZE; err = rw_copy_check_uvector(save_addr ? READ : WRITE, - uiov, kmsg->msg_iovlen, + uiov, nr_segs, UIO_FASTIOV, *iov, iov); if (err >= 0) - kmsg->msg_iov = *iov; + iov_iter_init(&kmsg->msg_iter, save_addr ? READ : WRITE, + *iov, nr_segs, err); return err; } diff --git a/net/tipc/msg.c b/net/tipc/msg.c index 5b0659791c07..a687b30a699c 100644 --- a/net/tipc/msg.c +++ b/net/tipc/msg.c @@ -194,7 +194,7 @@ int tipc_msg_build(struct tipc_msg *mhdr, struct msghdr *m, int offset, __skb_queue_tail(list, skb); skb_copy_to_linear_data(skb, mhdr, mhsz); pktpos = skb->data + mhsz; - if (!dsz || !memcpy_fromiovecend(pktpos, m->msg_iov, offset, + if (!dsz || !memcpy_fromiovecend(pktpos, m->msg_iter.iov, offset, dsz)) return dsz; rc = -EFAULT; @@ -224,7 +224,7 @@ int tipc_msg_build(struct tipc_msg *mhdr, struct msghdr *m, int offset, if (drem < pktrem) pktrem = drem; - if (memcpy_fromiovecend(pktpos, m->msg_iov, offset, pktrem)) { + if (memcpy_fromiovecend(pktpos, m->msg_iter.iov, offset, pktrem)) { rc = -EFAULT; goto error; } diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c index 4450d6226602..8e1b10274b02 100644 --- a/net/unix/af_unix.c +++ b/net/unix/af_unix.c @@ -1459,9 +1459,6 @@ static int unix_dgram_sendmsg(struct kiocb *kiocb, struct socket *sock, struct scm_cookie tmp_scm; int max_level; int data_len = 0; - struct iov_iter from; - - iov_iter_init(&from, WRITE, msg->msg_iov, msg->msg_iovlen, len); if (NULL == siocb->scm) siocb->scm = &tmp_scm; @@ -1519,7 +1516,7 @@ static int unix_dgram_sendmsg(struct kiocb *kiocb, struct socket *sock, skb_put(skb, len - data_len); skb->data_len = data_len; skb->len = len; - err = skb_copy_datagram_from_iter(skb, 0, &from, len); + err = skb_copy_datagram_from_iter(skb, 0, &msg->msg_iter, len); if (err) goto out_free; @@ -1641,9 +1638,6 @@ static int unix_stream_sendmsg(struct kiocb *kiocb, struct socket *sock, bool fds_sent = false; int max_level; int data_len; - struct iov_iter from; - - iov_iter_init(&from, WRITE, msg->msg_iov, msg->msg_iovlen, len); if (NULL == siocb->scm) siocb->scm = &tmp_scm; @@ -1700,7 +1694,7 @@ static int unix_stream_sendmsg(struct kiocb *kiocb, struct socket *sock, skb_put(skb, size - data_len); skb->data_len = data_len; skb->len = size; - err = skb_copy_datagram_from_iter(skb, 0, &from, size); + err = skb_copy_datagram_from_iter(skb, 0, &msg->msg_iter, size); if (err) { kfree_skb(skb); goto out_err; diff --git a/net/vmw_vsock/vmci_transport.c b/net/vmw_vsock/vmci_transport.c index 20a0ba3bfff6..02d2e5229240 100644 --- a/net/vmw_vsock/vmci_transport.c +++ b/net/vmw_vsock/vmci_transport.c @@ -1850,7 +1850,8 @@ static ssize_t vmci_transport_stream_enqueue( struct msghdr *msg, size_t len) { - return vmci_qpair_enquev(vmci_trans(vsk)->qpair, msg->msg_iov, len, 0); + /* XXX: stripping const */ + return vmci_qpair_enquev(vmci_trans(vsk)->qpair, (struct iovec *)msg->msg_iter.iov, len, 0); } static s64 vmci_transport_stream_has_data(struct vsock_sock *vsk) |