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ceph: don't set WRITE_PENDING too early 

prepare_write_connect() prepares a connect message, then sets
WRITE_PENDING on the connection.  Then *after* this, it calls
prepare_connect_authorizer(), which updates the content of the
connection buffer already queued for sending.  It's also possible it
will result in prepare_write_connect() returning -EAGAIN despite the
WRITE_PENDING big getting set.

Fix this by preparing the connect authorizer first, setting the
WRITE_PENDING bit only after that is done.

Partially addresses http://tracker.newdream.net/issues/2424

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Sage Weil <sage@inktank.com>
This commit is contained in:
Alex Elder 2012-05-16 15:16:38 -05:00 committed by Alex Elder
parent e825a66df9
commit e10c758e40
1 changed files with 5 additions and 1 deletions
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6
net/ceph/messenger.c
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@ -697,6 +697,7 @@ static int prepare_write_connect(struct ceph_connection *con)
{
unsigned global_seq = get_global_seq(con->msgr, 0);
int proto;
int ret;
switch (con->peer_name.type) {
case CEPH_ENTITY_TYPE_MON:
@ -723,11 +724,14 @@ static int prepare_write_connect(struct ceph_connection *con)
con->out_connect.flags = 0;
ceph_con_out_kvec_add(con, sizeof (con->out_connect), &con->out_connect);
ret = prepare_connect_authorizer(con);
if (ret)
return ret;
con->out_more = 0;
set_bit(WRITE_PENDING, &con->state);
return prepare_connect_authorizer(con);
return 0;
}
/*