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authorEric Van Hensbergen <ericvh@opteron.9grid.us>2008-05-08 20:26:37 -0500
committerEric Van Hensbergen <ericvh@opteron.9grid.us>2008-05-14 19:23:27 -0500
commit887b3ece65be7b643dfdae0d433c91a26a3f437d (patch)
tree471889dcdd3f7eb6762d863fef236014c63a0301 /net/9p/trans_fd.c
parent332c421e67045343de74e644cdf389f559f0d83f (diff)
downloadlinux-2.6.38-lt-ux500-887b3ece65be7b643dfdae0d433c91a26a3f437d.tar.gz
9p: fix error path during early mount
There was some cleanup issues during early mount which would trigger a kernel bug for certain types of failure. This patch reorganizes the cleanup to get rid of the bad behavior. This also merges the 9pnet and 9pnet_fd modules for the purpose of configuration and initialization. Keeping the fd transport separate from the core 9pnet code seemed like a good idea at the time, but in practice has caused more harm and confusion than good. Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
Diffstat (limited to 'net/9p/trans_fd.c')
-rw-r--r--net/9p/trans_fd.c29
1 files changed, 22 insertions, 7 deletions
diff --git a/net/9p/trans_fd.c b/net/9p/trans_fd.c
index 97b103b7049..4507f744f44 100644
--- a/net/9p/trans_fd.c
+++ b/net/9p/trans_fd.c
@@ -1433,6 +1433,23 @@ static void p9_fd_close(struct p9_trans *trans)
kfree(ts);
}
+/*
+ * stolen from NFS - maybe should be made a generic function?
+ */
+static inline int valid_ipaddr4(const char *buf)
+{
+ int rc, count, in[4];
+
+ rc = sscanf(buf, "%d.%d.%d.%d", &in[0], &in[1], &in[2], &in[3]);
+ if (rc != 4)
+ return -EINVAL;
+ for (count = 0; count < 4; count++) {
+ if (in[count] > 255)
+ return -EINVAL;
+ }
+ return 0;
+}
+
static struct p9_trans *
p9_trans_create_tcp(const char *addr, char *args, int msize, unsigned char dotu)
{
@@ -1447,6 +1464,9 @@ p9_trans_create_tcp(const char *addr, char *args, int msize, unsigned char dotu)
if (err < 0)
return ERR_PTR(err);
+ if (valid_ipaddr4(addr) < 0)
+ return ERR_PTR(-EINVAL);
+
csocket = NULL;
trans = kmalloc(sizeof(struct p9_trans), GFP_KERNEL);
if (!trans)
@@ -1625,7 +1645,7 @@ static struct p9_trans_module p9_fd_trans = {
.create = p9_trans_create_fd,
};
-static int __init p9_trans_fd_init(void)
+int p9_trans_fd_init(void)
{
int ret = p9_mux_global_init();
if (ret) {
@@ -1639,9 +1659,4 @@ static int __init p9_trans_fd_init(void)
return 0;
}
-
-module_init(p9_trans_fd_init);
-
-MODULE_AUTHOR("Latchesar Ionkov <lucho@ionkov.net>");
-MODULE_AUTHOR("Eric Van Hensbergen <ericvh@gmail.com>");
-MODULE_LICENSE("GPL");
+EXPORT_SYMBOL(p9_trans_fd_init);