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net: fix race on socket shutdown

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Thomas Schoebel-Theuer 2012-12-18 14:21:59 +01:00 committed by Thomas Schoebel-Theuer
parent 7e06125f6b
commit bdd4a975f2
1 changed files with 13 additions and 6 deletions
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19
mars_net.c
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@ -213,7 +213,12 @@ int mars_accept_socket(struct mars_socket *new_msock, struct mars_socket *old_ms
ok = mars_get_socket(old_msock);
if (likely(ok)) {
status = kernel_accept(old_msock->s_socket, &new_socket, O_NONBLOCK);
struct socket *sock = old_msock->s_socket;
if (unlikely(!sock)) {
goto err;
}
status = kernel_accept(sock, &new_socket, O_NONBLOCK);
if (unlikely(status < 0)) {
goto err;
}
@ -335,8 +340,9 @@ int _mars_send_raw(struct mars_socket *msock, const void *buf, int len)
while (len > 0) {
int this_len = len;
struct socket *sock = msock->s_socket;
if (!mars_net_is_alive || brick_thread_should_stop()) {
if (unlikely(!sock || !mars_net_is_alive || brick_thread_should_stop())) {
MARS_WRN("interrupting, sent = %d\n", sent);
status = -EIDRM;
break;
@ -357,7 +363,7 @@ int _mars_send_raw(struct mars_socket *msock, const void *buf, int len)
if (this_len < len)
flags |= MSG_MORE;
status = kernel_sendpage(msock->s_socket, page, page_offset, this_len, flags);
status = kernel_sendpage(sock, page, page_offset, this_len, flags);
if (status > 0 && status != this_len) {
MARS_WRN("#%d status = %d this_len = %d\n", msock->s_debug_nr, status, this_len);
}
@ -372,7 +378,7 @@ int _mars_send_raw(struct mars_socket *msock, const void *buf, int len)
.msg_iov = (struct iovec*)&iov,
.msg_flags = 0 | MSG_NOSIGNAL,
};
status = kernel_sendmsg(msock->s_socket, &msg, &iov, 1, this_len);
status = kernel_sendmsg(sock, &msg, &iov, 1, this_len);
}
#endif
@ -516,8 +522,9 @@ int mars_recv_raw(struct mars_socket *msock, void *buf, int minlen, int maxlen)
.msg_flags = 0 | MSG_DONTWAIT | MSG_NOSIGNAL,
#endif
};
struct socket *sock = msock->s_socket;
if (unlikely(!msock->s_socket)) {
if (unlikely(!sock)) {
MARS_WRN("#%d socket has disappeared\n", msock->s_debug_nr);
status = -EIDRM;
goto err;
@ -532,7 +539,7 @@ int mars_recv_raw(struct mars_socket *msock, void *buf, int minlen, int maxlen)
MARS_LOW("#%d done %d, fetching %d bytes\n", msock->s_debug_nr, done, maxlen-done);
status = kernel_recvmsg(msock->s_socket, &msg, &iov, 1, maxlen-done, msg.msg_flags);
status = kernel_recvmsg(sock, &msg, &iov, 1, maxlen-done, msg.msg_flags);
MARS_LOW("#%d status = %d\n", msock->s_debug_nr, status);