aboutsummaryrefslogtreecommitdiff
path: root/net/9p/trans_fd.c
diff options
context:
space:
mode:
authorTejun Heo <tj@kernel.org>2008-09-24 16:22:23 -0500
committerEric Van Hensbergen <ericvh@ericvh-desktop.austin.ibm.com>2008-09-24 16:22:23 -0500
commit72029fe85d8d060b3f966f2dbc36b3c75b5a6532 (patch)
treeef8948240b0aff2a366136a8303afc70e6c84da8 /net/9p/trans_fd.c
parent72d31053f62c4bc464c2783974926969614a8649 (diff)
downloadlinux-2.6.38-lt-ux500-72029fe85d8d060b3f966f2dbc36b3c75b5a6532.tar.gz
9p: implement proper trans module refcounting and unregistration
9p trans modules aren't refcounted nor were they unregistered properly. Fix it. * Add 9p_trans_module->owner and reference the module on each trans instance creation and put it on destruction. * Protect v9fs_trans_list with a spinlock. This isn't strictly necessary as the list is manipulated only during module loading / unloading but it's a good idea to make the API safe. * Unregister trans modules when the corresponding module is being unloaded. * While at it, kill unnecessary EXPORT_SYMBOL on p9_trans_fd_init(). Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
Diffstat (limited to 'net/9p/trans_fd.c')
-rw-r--r--net/9p/trans_fd.c11
1 files changed, 10 insertions, 1 deletions
diff --git a/net/9p/trans_fd.c b/net/9p/trans_fd.c
index cdf137af7ad..6a32ffdb942 100644
--- a/net/9p/trans_fd.c
+++ b/net/9p/trans_fd.c
@@ -1629,6 +1629,7 @@ static struct p9_trans_module p9_tcp_trans = {
.maxsize = MAX_SOCK_BUF,
.def = 1,
.create = p9_trans_create_tcp,
+ .owner = THIS_MODULE,
};
static struct p9_trans_module p9_unix_trans = {
@@ -1636,6 +1637,7 @@ static struct p9_trans_module p9_unix_trans = {
.maxsize = MAX_SOCK_BUF,
.def = 0,
.create = p9_trans_create_unix,
+ .owner = THIS_MODULE,
};
static struct p9_trans_module p9_fd_trans = {
@@ -1643,6 +1645,7 @@ static struct p9_trans_module p9_fd_trans = {
.maxsize = MAX_SOCK_BUF,
.def = 0,
.create = p9_trans_create_fd,
+ .owner = THIS_MODULE,
};
int p9_trans_fd_init(void)
@@ -1659,4 +1662,10 @@ int p9_trans_fd_init(void)
return 0;
}
-EXPORT_SYMBOL(p9_trans_fd_init);
+
+void p9_trans_fd_exit(void)
+{
+ v9fs_unregister_trans(&p9_tcp_trans);
+ v9fs_unregister_trans(&p9_unix_trans);
+ v9fs_unregister_trans(&p9_fd_trans);
+}