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[TCP] tcp_read_sock: Allow recv_actor() return return negative error value.

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tcp_read_sock() currently assumes that the recv_actor() only returns
number of bytes copied. For network splice receive, we may have to
return an error in some cases. So allow the actor to return a negative
error value.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jens Axboe 2007-06-23 23:07:50 -07:00 committed by David S. Miller
parent 4b2a8fb3a7
commit ddb61a57bb
1 changed files with 6 additions and 2 deletions
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8
net/ipv4/tcp.c
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@ -1064,7 +1064,11 @@ int tcp_read_sock(struct sock *sk, read_descriptor_t *desc,
break; break;
} }
used = recv_actor(desc, skb, offset, len); used = recv_actor(desc, skb, offset, len);
if (used <= len) { if (used < 0) {
if (!copied)
copied = used;
break;
} else if (used <= len) {
seq += used; seq += used;
copied += used; copied += used;
offset += used; offset += used;
@ -1086,7 +1090,7 @@ int tcp_read_sock(struct sock *sk, read_descriptor_t *desc,
tcp_rcv_space_adjust(sk); tcp_rcv_space_adjust(sk);
/* Clean up data we have read: This will do ACK frames. */ /* Clean up data we have read: This will do ACK frames. */
if (copied) if (copied > 0)
tcp_cleanup_rbuf(sk, copied); tcp_cleanup_rbuf(sk, copied);
return copied; return copied;
} }