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kernel/fs: Implement readv/writev for sockets.

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This is important for datagram sockets as we need to preserve
message boundaries. For stream sockets it's merely an optimization.
This commit is contained in:
Augustin Cavalier
2024-07-23 17:28:55 -04:00
parent 058f45b3c7
commit 3d2ea73c7b
1 changed files with 24 additions and 1 deletions
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src/system/kernel/fs/socket.cpp
+24 -1
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@@ -218,6 +218,28 @@ socket_write(struct file_descriptor *descriptor, off_t pos, const void *buffer,
}
static ssize_t
socket_readv(struct file_descriptor *descriptor, off_t pos,
const struct iovec *vecs, int count)
{
struct msghdr message = {};
message.msg_iov = (struct iovec*)vecs;
message.msg_iovlen = count;
return sStackInterface->recvmsg((net_socket*)descriptor->cookie, &message, 0);
}
static ssize_t
socket_writev(struct file_descriptor *descriptor, off_t pos,
const struct iovec *vecs, int count)
{
struct msghdr message = {};
message.msg_iov = (struct iovec*)vecs;
message.msg_iovlen = count;
return sStackInterface->sendmsg((net_socket*)descriptor->cookie, &message, 0);
}
static status_t
socket_ioctl(struct file_descriptor *descriptor, ulong op, void *buffer,
size_t length)
@@ -300,7 +322,8 @@ static struct fd_ops sSocketFDOps = {
&socket_free,
&socket_read,
&socket_write,
NULL, NULL, // readv(), writev()
&socket_readv,
&socket_writev,
NULL, // fd_seek
&socket_ioctl,
&socket_set_flags,