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libceph: encapsulate connection backoff

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Collect the code that tests for and implements a backoff delay for a
ceph connection into a new function, ceph_backoff().

Make the debug output messages in that part of the code report
things consistently by reporting a message in the socket closed
case, and by making the one for PREOPEN state report the connection
pointer like the rest.

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
This commit is contained in:
Alex Elder 2013-02-19 12:25:57 -06:00
parent 1541716789
commit f20a39fd6e
1 changed files with 24 additions and 13 deletions
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37
net/ceph/messenger.c
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@ -2345,6 +2345,24 @@ static bool con_sock_closed(struct ceph_connection *con)
return true;
}
static bool con_backoff(struct ceph_connection *con)
{
int ret;
if (!con_flag_test_and_clear(con, CON_FLAG_BACKOFF))
return false;
ret = queue_con_delay(con, round_jiffies_relative(con->delay));
if (ret) {
dout("%s: con %p FAILED to back off %lu\n", __func__,
con, con->delay);
BUG_ON(ret == -ENOENT);
con_flag_set(con, CON_FLAG_BACKOFF);
}
return true;
}
/*
* Do some work on a connection. Drop a connection ref when we're done.
*/
@ -2356,21 +2374,14 @@ static void con_work(struct work_struct *work)
mutex_lock(&con->mutex);
restart:
if (con_sock_closed(con))
if (con_sock_closed(con)) {
dout("%s: con %p SOCK_CLOSED\n", __func__, con);
goto fault;
if (con_flag_test_and_clear(con, CON_FLAG_BACKOFF)) {
dout("con_work %p backing off\n", con);
ret = queue_con_delay(con, round_jiffies_relative(con->delay));
if (ret) {
dout("con_work %p FAILED to back off %lu\n", con,
con->delay);
BUG_ON(ret == -ENOENT);
con_flag_set(con, CON_FLAG_BACKOFF);
}
}
if (con_backoff(con)) {
dout("%s: con %p BACKOFF\n", __func__, con);
goto done;
}
if (con->state == CON_STATE_STANDBY) {
dout("con_work %p STANDBY\n", con);
goto done;
@ -2381,7 +2392,7 @@ restart:
goto done;
}
if (con->state == CON_STATE_PREOPEN) {
dout("con_work OPENING\n");
dout("%s: con %p OPENING\n", __func__, con);
BUG_ON(con->sock);
}