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Lock socket buffers when processing setting socket options SO_SNDLOWAT

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or SO_RCVLOWAT for read-modify-write.
This commit is contained in:
Robert Watson 2004-06-24 04:28:30 +00:00
parent 63a9224f4c
commit c6b93bf29a
1 changed files with 4 additions and 0 deletions
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4
sys/kern/uipc_socket.c
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@ -1495,14 +1495,18 @@ sosetopt(so, sopt)
* the high-water.
*/
case SO_SNDLOWAT:
SOCKBUF_LOCK(&so->so_snd);
so->so_snd.sb_lowat =
(optval > so->so_snd.sb_hiwat) ?
so->so_snd.sb_hiwat : optval;
SOCKBUF_UNLOCK(&so->so_snd);
break;
case SO_RCVLOWAT:
SOCKBUF_LOCK(&so->so_rcv);
so->so_rcv.sb_lowat =
(optval > so->so_rcv.sb_hiwat) ?
so->so_rcv.sb_hiwat : optval;
SOCKBUF_UNLOCK(&so->so_rcv);
break;
}
break;