Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/include/linux/nfsd/cache.h b/include/linux/nfsd/cache.h
new file mode 100644
index 0000000..c3a3557
--- /dev/null
+++ b/include/linux/nfsd/cache.h
@@ -0,0 +1,81 @@
+/*
+ * include/linux/nfsd/cache.h
+ *
+ * Request reply cache. This was heavily inspired by the
+ * implementation in 4.3BSD/4.4BSD.
+ *
+ * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
+ */
+
+#ifndef NFSCACHE_H
+#define NFSCACHE_H
+
+#ifdef __KERNEL__
+#include <linux/in.h>
+#include <linux/uio.h>
+
+/*
+ * Representation of a reply cache entry. The first two members *must*
+ * be hash_next and hash_prev.
+ */
+struct svc_cacherep {
+ struct hlist_node c_hash;
+ struct list_head c_lru;
+
+ unsigned char c_state, /* unused, inprog, done */
+ c_type, /* status, buffer */
+ c_secure : 1; /* req came from port < 1024 */
+ struct sockaddr_in c_addr;
+ u32 c_xid;
+ u32 c_prot;
+ u32 c_proc;
+ u32 c_vers;
+ unsigned long c_timestamp;
+ union {
+ struct kvec u_vec;
+ u32 u_status;
+ } c_u;
+};
+
+#define c_replvec c_u.u_vec
+#define c_replstat c_u.u_status
+
+/* cache entry states */
+enum {
+ RC_UNUSED,
+ RC_INPROG,
+ RC_DONE
+};
+
+/* return values */
+enum {
+ RC_DROPIT,
+ RC_REPLY,
+ RC_DOIT,
+ RC_INTR
+};
+
+/*
+ * Cache types.
+ * We may want to add more types one day, e.g. for diropres and
+ * attrstat replies. Using cache entries with fixed length instead
+ * of buffer pointers may be more efficient.
+ */
+enum {
+ RC_NOCACHE,
+ RC_REPLSTAT,
+ RC_REPLBUFF,
+};
+
+/*
+ * If requests are retransmitted within this interval, they're dropped.
+ */
+#define RC_DELAY (HZ/5)
+
+void nfsd_cache_init(void);
+void nfsd_cache_shutdown(void);
+int nfsd_cache_lookup(struct svc_rqst *, int);
+void nfsd_cache_update(struct svc_rqst *, int, u32 *);
+
+#endif /* __KERNEL__ */
+#endif /* NFSCACHE_H */