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authorPatrick McHardy <kaber@trash.net>2007-07-11 19:46:26 -0700
committerDavid S. Miller <davem@davemloft.net>2007-07-11 19:46:26 -0700
commitdb3d99c090e0cdb34b1274767e062bfddbb384bc (patch)
tree9130391307ac77b7f458db5d3994309df6c9877b
parent662ad4f8efd3ba2ed710d36003f968b500e6f123 (diff)
downloadlinux-db3d99c090e0cdb34b1274767e062bfddbb384bc.tar.bz2
[NET_SCHED]: ematch: module autoloading
Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--include/linux/pkt_cls.h17
-rw-r--r--include/net/pkt_cls.h2
-rw-r--r--net/sched/em_cmp.c1
-rw-r--r--net/sched/em_meta.c2
-rw-r--r--net/sched/em_nbyte.c2
-rw-r--r--net/sched/em_text.c2
-rw-r--r--net/sched/em_u32.c2
-rw-r--r--net/sched/ematch.c13
8 files changed, 31 insertions, 10 deletions
diff --git a/include/linux/pkt_cls.h b/include/linux/pkt_cls.h
index c3f01b3085a4..30b8571e6b34 100644
--- a/include/linux/pkt_cls.h
+++ b/include/linux/pkt_cls.h
@@ -403,16 +403,13 @@ enum
* 1..32767 Reserved for ematches inside kernel tree
* 32768..65535 Free to use, not reliable
*/
-enum
-{
- TCF_EM_CONTAINER,
- TCF_EM_CMP,
- TCF_EM_NBYTE,
- TCF_EM_U32,
- TCF_EM_META,
- TCF_EM_TEXT,
- __TCF_EM_MAX
-};
+#define TCF_EM_CONTAINER 0
+#define TCF_EM_CMP 1
+#define TCF_EM_NBYTE 2
+#define TCF_EM_U32 3
+#define TCF_EM_META 4
+#define TCF_EM_TEXT 5
+#define TCF_EM_MAX 5
enum
{
diff --git a/include/net/pkt_cls.h b/include/net/pkt_cls.h
index 4129df708079..6c29920cbe29 100644
--- a/include/net/pkt_cls.h
+++ b/include/net/pkt_cls.h
@@ -306,6 +306,8 @@ static inline int tcf_em_tree_match(struct sk_buff *skb,
return 1;
}
+#define MODULE_ALIAS_TCF_EMATCH(kind) MODULE_ALIAS("ematch-kind-" __stringify(kind))
+
#else /* CONFIG_NET_EMATCH */
struct tcf_ematch_tree
diff --git a/net/sched/em_cmp.c b/net/sched/em_cmp.c
index 8d6dacd81900..cc49c932641d 100644
--- a/net/sched/em_cmp.c
+++ b/net/sched/em_cmp.c
@@ -98,3 +98,4 @@ MODULE_LICENSE("GPL");
module_init(init_em_cmp);
module_exit(exit_em_cmp);
+MODULE_ALIAS_TCF_EMATCH(TCF_EM_CMP);
diff --git a/net/sched/em_meta.c b/net/sched/em_meta.c
index 60acf8cdb27b..650f09c8bd6a 100644
--- a/net/sched/em_meta.c
+++ b/net/sched/em_meta.c
@@ -848,3 +848,5 @@ MODULE_LICENSE("GPL");
module_init(init_em_meta);
module_exit(exit_em_meta);
+
+MODULE_ALIAS_TCF_EMATCH(TCF_EM_META);
diff --git a/net/sched/em_nbyte.c b/net/sched/em_nbyte.c
index b4b36efce292..370a1b2ea317 100644
--- a/net/sched/em_nbyte.c
+++ b/net/sched/em_nbyte.c
@@ -76,3 +76,5 @@ MODULE_LICENSE("GPL");
module_init(init_em_nbyte);
module_exit(exit_em_nbyte);
+
+MODULE_ALIAS_TCF_EMATCH(TCF_EM_NBYTE);
diff --git a/net/sched/em_text.c b/net/sched/em_text.c
index e8f46169449d..d5cd86efb7d0 100644
--- a/net/sched/em_text.c
+++ b/net/sched/em_text.c
@@ -150,3 +150,5 @@ MODULE_LICENSE("GPL");
module_init(init_em_text);
module_exit(exit_em_text);
+
+MODULE_ALIAS_TCF_EMATCH(TCF_EM_TEXT);
diff --git a/net/sched/em_u32.c b/net/sched/em_u32.c
index 0a2a7fe08de3..112796e4a7c4 100644
--- a/net/sched/em_u32.c
+++ b/net/sched/em_u32.c
@@ -60,3 +60,5 @@ MODULE_LICENSE("GPL");
module_init(init_em_u32);
module_exit(exit_em_u32);
+
+MODULE_ALIAS_TCF_EMATCH(TCF_EM_U32);
diff --git a/net/sched/ematch.c b/net/sched/ematch.c
index 24837391640d..f3a104e323bd 100644
--- a/net/sched/ematch.c
+++ b/net/sched/ematch.c
@@ -222,6 +222,19 @@ static int tcf_em_validate(struct tcf_proto *tp,
if (em->ops == NULL) {
err = -ENOENT;
+#ifdef CONFIG_KMOD
+ __rtnl_unlock();
+ request_module("ematch-kind-%u", em_hdr->kind);
+ rtnl_lock();
+ em->ops = tcf_em_lookup(em_hdr->kind);
+ if (em->ops) {
+ /* We dropped the RTNL mutex in order to
+ * perform the module load. Tell the caller
+ * to replay the request. */
+ module_put(em->ops->owner);
+ err = -EAGAIN;
+ }
+#endif
goto errout;
}