提交 42961d23 编写于 作者: S Sage Weil

libceph: fix socket write error handling

Pass errors from writing to the socket up the stack.  If we get -EAGAIN,
return 0 from the helper to simplify the callers' checks.
Signed-off-by: NSage Weil <sage@newdream.net>
上级 98bdb0aa
......@@ -268,13 +268,17 @@ static int ceph_tcp_sendmsg(struct socket *sock, struct kvec *iov,
size_t kvlen, size_t len, int more)
{
struct msghdr msg = { .msg_flags = MSG_DONTWAIT | MSG_NOSIGNAL };
int r;
if (more)
msg.msg_flags |= MSG_MORE;
else
msg.msg_flags |= MSG_EOR; /* superfluous, but what the hell */
return kernel_sendmsg(sock, &msg, iov, kvlen, len);
r = kernel_sendmsg(sock, &msg, iov, kvlen, len);
if (r == -EAGAIN)
r = 0;
return r;
}
......@@ -851,6 +855,8 @@ static int write_partial_msg_pages(struct ceph_connection *con)
(msg->pages || msg->pagelist || msg->bio || in_trail))
kunmap(page);
if (ret == -EAGAIN)
ret = 0;
if (ret <= 0)
goto out;
......@@ -1741,16 +1747,12 @@ static int try_write(struct ceph_connection *con)
if (con->out_skip) {
ret = write_partial_skip(con);
if (ret <= 0)
goto done;
if (ret < 0) {
dout("try_write write_partial_skip err %d\n", ret);
goto done;
}
goto out;
}
if (con->out_kvec_left) {
ret = write_partial_kvec(con);
if (ret <= 0)
goto done;
goto out;
}
/* msg pages? */
......@@ -1765,11 +1767,11 @@ static int try_write(struct ceph_connection *con)
if (ret == 1)
goto more_kvec; /* we need to send the footer, too! */
if (ret == 0)
goto done;
goto out;
if (ret < 0) {
dout("try_write write_partial_msg_pages err %d\n",
ret);
goto done;
goto out;
}
}
......@@ -1793,10 +1795,9 @@ static int try_write(struct ceph_connection *con)
/* Nothing to do! */
clear_bit(WRITE_PENDING, &con->state);
dout("try_write nothing else to write.\n");
done:
ret = 0;
out:
dout("try_write done on %p\n", con);
dout("try_write done on %p ret %d\n", con, ret);
return ret;
}
......
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