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ocfs2/cluster: Pin the remote node item in configfs 

o2net pins the node item of the remote node in configfs before initiating
the connection. It is unpinned on disconnect. This is to prevent the node
item from being unlinked while it is still in use.

Signed-off-by: Sunil Mushran <sunil.mushran@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
This commit is contained in:
Sunil Mushran 2010-12-14 14:14:27 -08:00 committed by Joel Becker
parent 66f4500573
commit 2b190ce9bf
1 changed files with 9 additions and 0 deletions
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9
fs/ocfs2/cluster/tcp.c
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@ -355,6 +355,7 @@ static void sc_kref_release(struct kref *kref)
sc->sc_sock = NULL;
}
o2nm_undepend_item(&sc->sc_node->nd_item);
o2nm_node_put(sc->sc_node);
sc->sc_node = NULL;
@ -376,6 +377,7 @@ static struct o2net_sock_container *sc_alloc(struct o2nm_node *node)
{
struct o2net_sock_container *sc, *ret = NULL;
struct page *page = NULL;
int status = 0;
page = alloc_page(GFP_NOFS);
sc = kzalloc(sizeof(*sc), GFP_NOFS);
@ -386,6 +388,13 @@ static struct o2net_sock_container *sc_alloc(struct o2nm_node *node)
o2nm_node_get(node);
sc->sc_node = node;
/* pin the node item of the remote node */
status = o2nm_depend_item(&node->nd_item);
if (status) {
mlog_errno(status);
o2nm_node_put(node);
goto out;
}
INIT_WORK(&sc->sc_connect_work, o2net_sc_connect_completed);
INIT_WORK(&sc->sc_rx_work, o2net_rx_until_empty);
INIT_WORK(&sc->sc_shutdown_work, o2net_shutdown_sc);