libceph: start separating connection flags from state
A ceph_connection holds a mixture of connection state (as in "state
machine" state) and connection flags in a single "state" field. To
make the distinction more clear, define a new "flags" field and use
it rather than the "state" field to hold Boolean flag values.
Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Sage Weil<sage@inktank.com>
diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c
index d8423a3..e84e4fd8 100644
--- a/net/ceph/messenger.c
+++ b/net/ceph/messenger.c
@@ -176,7 +176,7 @@
* buffer. See net/ipv4/tcp_input.c:tcp_check_space()
* and net/core/stream.c:sk_stream_write_space().
*/
- if (test_bit(WRITE_PENDING, &con->state)) {
+ if (test_bit(WRITE_PENDING, &con->flags)) {
if (sk_stream_wspace(sk) >= sk_stream_min_wspace(sk)) {
dout("%s %p queueing write work\n", __func__, con);
clear_bit(SOCK_NOSPACE, &sk->sk_socket->flags);
@@ -203,7 +203,7 @@
dout("%s TCP_CLOSE\n", __func__);
case TCP_CLOSE_WAIT:
dout("%s TCP_CLOSE_WAIT\n", __func__);
- if (test_and_set_bit(SOCK_CLOSED, &con->state) == 0) {
+ if (test_and_set_bit(SOCK_CLOSED, &con->flags) == 0) {
if (test_bit(CONNECTING, &con->state))
con->error_msg = "connection failed";
else
@@ -395,9 +395,9 @@
ceph_pr_addr(&con->peer_addr.in_addr));
set_bit(CLOSED, &con->state); /* in case there's queued work */
clear_bit(STANDBY, &con->state); /* avoid connect_seq bump */
- clear_bit(LOSSYTX, &con->state); /* so we retry next connect */
- clear_bit(KEEPALIVE_PENDING, &con->state);
- clear_bit(WRITE_PENDING, &con->state);
+ clear_bit(LOSSYTX, &con->flags); /* so we retry next connect */
+ clear_bit(KEEPALIVE_PENDING, &con->flags);
+ clear_bit(WRITE_PENDING, &con->flags);
mutex_lock(&con->mutex);
reset_connection(con);
con->peer_global_seq = 0;
@@ -614,7 +614,7 @@
prepare_write_message_footer(con);
}
- set_bit(WRITE_PENDING, &con->state);
+ set_bit(WRITE_PENDING, &con->flags);
}
/*
@@ -635,7 +635,7 @@
&con->out_temp_ack);
con->out_more = 1; /* more will follow.. eventually.. */
- set_bit(WRITE_PENDING, &con->state);
+ set_bit(WRITE_PENDING, &con->flags);
}
/*
@@ -646,7 +646,7 @@
dout("prepare_write_keepalive %p\n", con);
con_out_kvec_reset(con);
con_out_kvec_add(con, sizeof (tag_keepalive), &tag_keepalive);
- set_bit(WRITE_PENDING, &con->state);
+ set_bit(WRITE_PENDING, &con->flags);
}
/*
@@ -675,7 +675,7 @@
if (IS_ERR(auth))
return auth;
- if (test_bit(CLOSED, &con->state) || test_bit(OPENING, &con->state))
+ if (test_bit(CLOSED, &con->state) || test_bit(OPENING, &con->flags))
return ERR_PTR(-EAGAIN);
con->auth_reply_buf = auth->authorizer_reply_buf;
@@ -695,7 +695,7 @@
&con->msgr->my_enc_addr);
con->out_more = 0;
- set_bit(WRITE_PENDING, &con->state);
+ set_bit(WRITE_PENDING, &con->flags);
}
static int prepare_write_connect(struct ceph_connection *con)
@@ -745,7 +745,7 @@
auth->authorizer_buf);
con->out_more = 0;
- set_bit(WRITE_PENDING, &con->state);
+ set_bit(WRITE_PENDING, &con->flags);
return 0;
}
@@ -1492,7 +1492,7 @@
le32_to_cpu(con->in_reply.connect_seq));
if (con->in_reply.flags & CEPH_MSG_CONNECT_LOSSY)
- set_bit(LOSSYTX, &con->state);
+ set_bit(LOSSYTX, &con->flags);
prepare_read_tag(con);
break;
@@ -1933,14 +1933,14 @@
prepare_write_ack(con);
goto more;
}
- if (test_and_clear_bit(KEEPALIVE_PENDING, &con->state)) {
+ if (test_and_clear_bit(KEEPALIVE_PENDING, &con->flags)) {
prepare_write_keepalive(con);
goto more;
}
}
/* Nothing to do! */
- clear_bit(WRITE_PENDING, &con->state);
+ clear_bit(WRITE_PENDING, &con->flags);
dout("try_write nothing else to write.\n");
ret = 0;
out:
@@ -2106,7 +2106,7 @@
mutex_lock(&con->mutex);
restart:
- if (test_and_clear_bit(BACKOFF, &con->state)) {
+ if (test_and_clear_bit(BACKOFF, &con->flags)) {
dout("con_work %p backing off\n", con);
if (queue_delayed_work(ceph_msgr_wq, &con->work,
round_jiffies_relative(con->delay))) {
@@ -2135,7 +2135,7 @@
con_close_socket(con);
}
- if (test_and_clear_bit(SOCK_CLOSED, &con->state))
+ if (test_and_clear_bit(SOCK_CLOSED, &con->flags))
goto fault;
ret = try_read(con);
@@ -2174,7 +2174,7 @@
dout("fault %p state %lu to peer %s\n",
con, con->state, ceph_pr_addr(&con->peer_addr.in_addr));
- if (test_bit(LOSSYTX, &con->state)) {
+ if (test_bit(LOSSYTX, &con->flags)) {
dout("fault on LOSSYTX channel\n");
goto out;
}
@@ -2196,9 +2196,9 @@
/* If there are no messages queued or keepalive pending, place
* the connection in a STANDBY state */
if (list_empty(&con->out_queue) &&
- !test_bit(KEEPALIVE_PENDING, &con->state)) {
+ !test_bit(KEEPALIVE_PENDING, &con->flags)) {
dout("fault %p setting STANDBY clearing WRITE_PENDING\n", con);
- clear_bit(WRITE_PENDING, &con->state);
+ clear_bit(WRITE_PENDING, &con->flags);
set_bit(STANDBY, &con->state);
} else {
/* retry after a delay. */
@@ -2222,7 +2222,7 @@
* that when con_work restarts we schedule the
* delay then.
*/
- set_bit(BACKOFF, &con->state);
+ set_bit(BACKOFF, &con->flags);
}
}
@@ -2278,8 +2278,8 @@
mutex_lock(&con->mutex);
dout("clear_standby %p and ++connect_seq\n", con);
con->connect_seq++;
- WARN_ON(test_bit(WRITE_PENDING, &con->state));
- WARN_ON(test_bit(KEEPALIVE_PENDING, &con->state));
+ WARN_ON(test_bit(WRITE_PENDING, &con->flags));
+ WARN_ON(test_bit(KEEPALIVE_PENDING, &con->flags));
mutex_unlock(&con->mutex);
}
}
@@ -2317,7 +2317,7 @@
/* if there wasn't anything waiting to send before, queue
* new work */
clear_standby(con);
- if (test_and_set_bit(WRITE_PENDING, &con->state) == 0)
+ if (test_and_set_bit(WRITE_PENDING, &con->flags) == 0)
queue_con(con);
}
EXPORT_SYMBOL(ceph_con_send);
@@ -2384,8 +2384,8 @@
{
dout("con_keepalive %p\n", con);
clear_standby(con);
- if (test_and_set_bit(KEEPALIVE_PENDING, &con->state) == 0 &&
- test_and_set_bit(WRITE_PENDING, &con->state) == 0)
+ if (test_and_set_bit(KEEPALIVE_PENDING, &con->flags) == 0 &&
+ test_and_set_bit(WRITE_PENDING, &con->flags) == 0)
queue_con(con);
}
EXPORT_SYMBOL(ceph_con_keepalive);