[IPSEC]: Make xfrm_lookup flags argument a bit-field
This patch introduces an enum for bits in the flags argument of xfrm_lookup.
This is so that we can cram more information into it later.
Since all current users use just the values 0 and 1, XFRM_LOOKUP_WAIT has
been added with the value 1 << 0 to represent the current meaning of flags.
The test in __xfrm_lookup has been changed accordingly.
Signed-off-by: Herbert Xu <[EMAIL PROTECTED]>
---
include/net/dst.h | 5 +++++
net/xfrm/xfrm_policy.c | 2 +-
2 files changed, 6 insertions(+), 1 deletion(-)
diff --git a/include/net/dst.h b/include/net/dst.h
index e86b9a0..aaa2dbb 100644
--- a/include/net/dst.h
+++ b/include/net/dst.h
@@ -265,6 +265,11 @@ static inline struct dst_entry *dst_check(struct dst_entry
*dst, u32 cookie)
extern void dst_init(void);
+/* Flags for xfrm_lookup flags argument. */
+enum {
+ XFRM_LOOKUP_WAIT = 1 << 0,
+};
+
struct flowi;
#ifndef CONFIG_XFRM
static inline int xfrm_lookup(struct dst_entry **dst_p, struct flowi *fl,
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c
index 39805b4..265c679 100644
--- a/net/xfrm/xfrm_policy.c
+++ b/net/xfrm/xfrm_policy.c
@@ -1565,7 +1565,7 @@ restart:
xfrm_pol_put(policy);
return -EREMOTE;
}
- if (err == -EAGAIN && flags) {
+ if (err == -EAGAIN && (flags & XFRM_LOOKUP_WAIT)) {
DECLARE_WAITQUEUE(wait, current);
add_wait_queue(&km_waitq, &wait);
--
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