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linux-2.6
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ceph: remove bad calls to ceph_con_shutdown 

We want to ceph_con_close when we're done with the connection, before
the ref count reaches 0.  Once it does, do not call ceph_con_shutdown,
as that takes the con mutex and may sleep, and besides that is
unnecessary.

Signed-off-by: Sage Weil <sage@newdream.net>
This commit is contained in:
Sage Weil 2009-11-18 11:22:36 -08:00
parent 11ea8eda06
commit 42ce56e50d
3 changed files with 19 additions and 16 deletions
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30
fs/ceph/mds_client.c
View File

@ -274,10 +274,8 @@ void ceph_put_mds_session(struct ceph_mds_session *s)
{
dout("mdsc put_session %p %d -> %d\n", s,
atomic_read(&s->s_ref), atomic_read(&s->s_ref)-1);
if (atomic_dec_and_test(&s->s_ref)) {
ceph_con_shutdown(&s->s_con);
if (atomic_dec_and_test(&s->s_ref))
kfree(s);
}
}
/*
@ -326,7 +324,6 @@ static struct ceph_mds_session *register_session(struct ceph_mds_client *mdsc,
s->s_con.ops = &mds_con_ops;
s->s_con.peer_name.type = CEPH_ENTITY_TYPE_MDS;
s->s_con.peer_name.num = cpu_to_le64(mds);
ceph_con_open(&s->s_con, ceph_mdsmap_get_addr(mdsc->mdsmap, mds));
spin_lock_init(&s->s_cap_lock);
s->s_cap_gen = 0;
@ -352,7 +349,7 @@ static struct ceph_mds_session *register_session(struct ceph_mds_client *mdsc,
dout("register_session realloc to %d\n", newmax);
sa = kcalloc(newmax, sizeof(void *), GFP_NOFS);
if (sa == NULL)
return ERR_PTR(-ENOMEM);
goto fail_realloc;
if (mdsc->sessions) {
memcpy(sa, mdsc->sessions,
mdsc->max_sessions * sizeof(void *));
@ -363,17 +360,26 @@ static struct ceph_mds_session *register_session(struct ceph_mds_client *mdsc,
}
mdsc->sessions[mds] = s;
atomic_inc(&s->s_ref); /* one ref to sessions[], one to caller */
ceph_con_open(&s->s_con, ceph_mdsmap_get_addr(mdsc->mdsmap, mds));
return s;
fail_realloc:
kfree(s);
return ERR_PTR(-ENOMEM);
}
/*
* called under mdsc->mutex
*/
static void unregister_session(struct ceph_mds_client *mdsc, int mds)
static void unregister_session(struct ceph_mds_client *mdsc,
struct ceph_mds_session *s)
{
dout("unregister_session mds%d %p\n", mds, mdsc->sessions[mds]);
ceph_put_mds_session(mdsc->sessions[mds]);
mdsc->sessions[mds] = NULL;
dout("unregister_session mds%d %p\n", s->s_mds, s);
mdsc->sessions[s->s_mds] = NULL;
ceph_con_close(&s->s_con);
ceph_put_mds_session(s);
}
/*
@ -1870,7 +1876,7 @@ static void handle_session(struct ceph_mds_session *session,
break;
case CEPH_SESSION_CLOSE:
unregister_session(mdsc, mds);
unregister_session(mdsc, session);
remove_session_caps(session);
wake = 1; /* for good measure */
complete(&mdsc->session_close_waiters);
@ -2199,7 +2205,7 @@ static void check_new_map(struct ceph_mds_client *mdsc,
/* the session never opened, just close it
* out now */
__wake_requests(mdsc, &s->s_waiting);
unregister_session(mdsc, i);
unregister_session(mdsc, s);
} else {
/* just close it */
mutex_unlock(&mdsc->mutex);
@ -2724,7 +2730,7 @@ void ceph_mdsc_close_sessions(struct ceph_mds_client *mdsc)
for (i = 0; i < mdsc->max_sessions; i++) {
if (mdsc->sessions[i]) {
session = get_session(mdsc->sessions[i]);
unregister_session(mdsc, i);
unregister_session(mdsc, session);
mutex_unlock(&mdsc->mutex);
mutex_lock(&session->s_mutex);
remove_session_caps(session);

1
fs/ceph/messenger.h
View File

@ -212,7 +212,6 @@ extern void ceph_messenger_destroy(struct ceph_messenger *);
extern void ceph_con_init(struct ceph_messenger *msgr,
struct ceph_connection *con);
extern void ceph_con_shutdown(struct ceph_connection *con);
extern void ceph_con_open(struct ceph_connection *con,
struct ceph_entity_addr *addr);
extern void ceph_con_close(struct ceph_connection *con);

4
fs/ceph/osd_client.c
View File

@ -350,10 +350,8 @@ static void put_osd(struct ceph_osd *osd)
{
dout("put_osd %p %d -> %d\n", osd, atomic_read(&osd->o_ref),
atomic_read(&osd->o_ref) - 1);
if (atomic_dec_and_test(&osd->o_ref)) {
ceph_con_shutdown(&osd->o_con);
if (atomic_dec_and_test(&osd->o_ref))
kfree(osd);
}
}
/*