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-rw-r--r--drivers/net/macvtap.c46
-rw-r--r--drivers/net/tun.c65
2 files changed, 51 insertions, 60 deletions
diff --git a/drivers/net/macvtap.c b/drivers/net/macvtap.c
index 880cc090dc44..cea99d4a8263 100644
--- a/drivers/net/macvtap.c
+++ b/drivers/net/macvtap.c
@@ -15,6 +15,7 @@
#include <linux/cdev.h>
#include <linux/idr.h>
#include <linux/fs.h>
+#include <linux/uio.h>
#include <net/ipv6.h>
#include <net/net_namespace.h>
@@ -778,31 +779,29 @@ static ssize_t macvtap_aio_write(struct kiocb *iocb, const struct iovec *iv,
/* Put packet to the user space buffer */
static ssize_t macvtap_put_user(struct macvtap_queue *q,
const struct sk_buff *skb,
- const struct iovec *iv, int len)
+ struct iov_iter *iter)
{
int ret;
int vnet_hdr_len = 0;
int vlan_offset = 0;
- int copied, total;
+ int total;
if (q->flags & IFF_VNET_HDR) {
struct virtio_net_hdr vnet_hdr;
vnet_hdr_len = q->vnet_hdr_sz;
- if ((len -= vnet_hdr_len) < 0)
+ if (iov_iter_count(iter) < vnet_hdr_len)
return -EINVAL;
macvtap_skb_to_vnet_hdr(skb, &vnet_hdr);
- if (memcpy_toiovecend(iv, (void *)&vnet_hdr, 0, sizeof(vnet_hdr)))
+ if (copy_to_iter(&vnet_hdr, sizeof(vnet_hdr), iter) !=
+ sizeof(vnet_hdr))
return -EFAULT;
}
- total = copied = vnet_hdr_len;
+ total = vnet_hdr_len;
total += skb->len;
- if (!vlan_tx_tag_present(skb))
- len = min_t(int, skb->len, len);
- else {
- int copy;
+ if (vlan_tx_tag_present(skb)) {
struct {
__be16 h_vlan_proto;
__be16 h_vlan_TCI;
@@ -811,37 +810,33 @@ static ssize_t macvtap_put_user(struct macvtap_queue *q,
veth.h_vlan_TCI = htons(vlan_tx_tag_get(skb));
vlan_offset = offsetof(struct vlan_ethhdr, h_vlan_proto);
- len = min_t(int, skb->len + VLAN_HLEN, len);
total += VLAN_HLEN;
- copy = min_t(int, vlan_offset, len);
- ret = skb_copy_datagram_const_iovec(skb, 0, iv, copied, copy);
- len -= copy;
- copied += copy;
- if (ret || !len)
+ ret = skb_copy_datagram_iter(skb, 0, iter, vlan_offset);
+ if (ret || !iov_iter_count(iter))
goto done;
- copy = min_t(int, sizeof(veth), len);
- ret = memcpy_toiovecend(iv, (void *)&veth, copied, copy);
- len -= copy;
- copied += copy;
- if (ret || !len)
+ ret = copy_to_iter(&veth, sizeof(veth), iter);
+ if (ret != sizeof(veth) || !iov_iter_count(iter))
goto done;
}
- ret = skb_copy_datagram_const_iovec(skb, vlan_offset, iv, copied, len);
+ ret = skb_copy_datagram_iter(skb, vlan_offset, iter,
+ skb->len - vlan_offset);
done:
return ret ? ret : total;
}
static ssize_t macvtap_do_read(struct macvtap_queue *q,
- const struct iovec *iv, unsigned long len,
+ const struct iovec *iv, unsigned long segs,
+ unsigned long len,
int noblock)
{
DEFINE_WAIT(wait);
struct sk_buff *skb;
ssize_t ret = 0;
+ struct iov_iter iter;
while (len) {
if (!noblock)
@@ -863,7 +858,8 @@ static ssize_t macvtap_do_read(struct macvtap_queue *q,
schedule();
continue;
}
- ret = macvtap_put_user(q, skb, iv, len);
+ iov_iter_init(&iter, READ, iv, segs, len);
+ ret = macvtap_put_user(q, skb, &iter);
kfree_skb(skb);
break;
}
@@ -886,7 +882,7 @@ static ssize_t macvtap_aio_read(struct kiocb *iocb, const struct iovec *iv,
goto out;
}
- ret = macvtap_do_read(q, iv, len, file->f_flags & O_NONBLOCK);
+ ret = macvtap_do_read(q, iv, count, len, file->f_flags & O_NONBLOCK);
ret = min_t(ssize_t, ret, len);
if (ret > 0)
iocb->ki_pos = ret;
@@ -1117,7 +1113,7 @@ static int macvtap_recvmsg(struct kiocb *iocb, struct socket *sock,
int ret;
if (flags & ~(MSG_DONTWAIT|MSG_TRUNC))
return -EINVAL;
- ret = macvtap_do_read(q, m->msg_iov, total_len,
+ ret = macvtap_do_read(q, m->msg_iov, m->msg_iovlen, total_len,
flags & MSG_DONTWAIT);
if (ret > total_len) {
m->msg_flags |= MSG_TRUNC;
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 9dd3746994a4..2ff769bf3f35 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -71,6 +71,7 @@
#include <net/rtnetlink.h>
#include <net/sock.h>
#include <linux/seq_file.h>
+#include <linux/uio.h>
#include <asm/uaccess.h>
@@ -1230,11 +1231,11 @@ static ssize_t tun_chr_aio_write(struct kiocb *iocb, const struct iovec *iv,
static ssize_t tun_put_user(struct tun_struct *tun,
struct tun_file *tfile,
struct sk_buff *skb,
- const struct iovec *iv, int len)
+ struct iov_iter *iter)
{
struct tun_pi pi = { 0, skb->protocol };
- ssize_t total = 0;
- int vlan_offset = 0, copied;
+ ssize_t total;
+ int vlan_offset;
int vlan_hlen = 0;
int vnet_hdr_sz = 0;
@@ -1244,23 +1245,25 @@ static ssize_t tun_put_user(struct tun_struct *tun,
if (tun->flags & TUN_VNET_HDR)
vnet_hdr_sz = tun->vnet_hdr_sz;
+ total = skb->len + vlan_hlen + vnet_hdr_sz;
+
if (!(tun->flags & TUN_NO_PI)) {
- if ((len -= sizeof(pi)) < 0)
+ if (iov_iter_count(iter) < sizeof(pi))
return -EINVAL;
- if (len < skb->len + vlan_hlen + vnet_hdr_sz) {
+ total += sizeof(pi);
+ if (iov_iter_count(iter) < total) {
/* Packet will be striped */
pi.flags |= TUN_PKT_STRIP;
}
- if (memcpy_toiovecend(iv, (void *) &pi, 0, sizeof(pi)))
+ if (copy_to_iter(&pi, sizeof(pi), iter) != sizeof(pi))
return -EFAULT;
- total += sizeof(pi);
}
if (vnet_hdr_sz) {
struct virtio_net_hdr gso = { 0 }; /* no info leak */
- if ((len -= vnet_hdr_sz) < 0)
+ if (iov_iter_count(iter) < vnet_hdr_sz)
return -EINVAL;
if (skb_is_gso(skb)) {
@@ -1299,17 +1302,12 @@ static ssize_t tun_put_user(struct tun_struct *tun,
gso.flags = VIRTIO_NET_HDR_F_DATA_VALID;
} /* else everything is zero */
- if (unlikely(memcpy_toiovecend(iv, (void *)&gso, total,
- sizeof(gso))))
+ if (copy_to_iter(&gso, sizeof(gso), iter) != sizeof(gso))
return -EFAULT;
- total += vnet_hdr_sz;
}
- copied = total;
- len = min_t(int, skb->len + vlan_hlen, len);
- total += skb->len + vlan_hlen;
if (vlan_hlen) {
- int copy, ret;
+ int ret;
struct {
__be16 h_vlan_proto;
__be16 h_vlan_TCI;
@@ -1320,36 +1318,32 @@ static ssize_t tun_put_user(struct tun_struct *tun,
vlan_offset = offsetof(struct vlan_ethhdr, h_vlan_proto);
- copy = min_t(int, vlan_offset, len);
- ret = skb_copy_datagram_const_iovec(skb, 0, iv, copied, copy);
- len -= copy;
- copied += copy;
- if (ret || !len)
+ ret = skb_copy_datagram_iter(skb, 0, iter, vlan_offset);
+ if (ret || !iov_iter_count(iter))
goto done;
- copy = min_t(int, sizeof(veth), len);
- ret = memcpy_toiovecend(iv, (void *)&veth, copied, copy);
- len -= copy;
- copied += copy;
- if (ret || !len)
+ ret = copy_to_iter(&veth, sizeof(veth), iter);
+ if (ret != sizeof(veth) || !iov_iter_count(iter))
goto done;
}
- skb_copy_datagram_const_iovec(skb, vlan_offset, iv, copied, len);
+ skb_copy_datagram_iter(skb, vlan_offset, iter, skb->len - vlan_offset);
done:
tun->dev->stats.tx_packets++;
- tun->dev->stats.tx_bytes += len;
+ tun->dev->stats.tx_bytes += skb->len + vlan_hlen;
return total;
}
static ssize_t tun_do_read(struct tun_struct *tun, struct tun_file *tfile,
- const struct iovec *iv, ssize_t len, int noblock)
+ const struct iovec *iv, unsigned long segs,
+ ssize_t len, int noblock)
{
struct sk_buff *skb;
ssize_t ret = 0;
int peeked, err, off = 0;
+ struct iov_iter iter;
tun_debug(KERN_INFO, tun, "tun_do_read\n");
@@ -1362,11 +1356,12 @@ static ssize_t tun_do_read(struct tun_struct *tun, struct tun_file *tfile,
/* Read frames from queue */
skb = __skb_recv_datagram(tfile->socket.sk, noblock ? MSG_DONTWAIT : 0,
&peeked, &off, &err);
- if (skb) {
- ret = tun_put_user(tun, tfile, skb, iv, len);
- kfree_skb(skb);
- } else
- ret = err;
+ if (!skb)
+ return ret;
+
+ iov_iter_init(&iter, READ, iv, segs, len);
+ ret = tun_put_user(tun, tfile, skb, &iter);
+ kfree_skb(skb);
return ret;
}
@@ -1387,7 +1382,7 @@ static ssize_t tun_chr_aio_read(struct kiocb *iocb, const struct iovec *iv,
goto out;
}
- ret = tun_do_read(tun, tfile, iv, len,
+ ret = tun_do_read(tun, tfile, iv, count, len,
file->f_flags & O_NONBLOCK);
ret = min_t(ssize_t, ret, len);
if (ret > 0)
@@ -1488,7 +1483,7 @@ static int tun_recvmsg(struct kiocb *iocb, struct socket *sock,
SOL_PACKET, TUN_TX_TIMESTAMP);
goto out;
}
- ret = tun_do_read(tun, tfile, m->msg_iov, total_len,
+ ret = tun_do_read(tun, tfile, m->msg_iov, m->msg_iovlen, total_len,
flags & MSG_DONTWAIT);
if (ret > total_len) {
m->msg_flags |= MSG_TRUNC;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-20 08:54:50 +0000