#include <linux/in.h>
#include <linux/sunrpc/types.h>
#include <linux/sunrpc/xdr.h>
+#include <linux/sunrpc/auth.h>
#include <linux/sunrpc/svcauth.h>
#include <linux/wait.h>
#include <linux/mm.h>
* Maximum payload size supported by a kernel RPC server.
* This is use to determine the max number of pages nfsd is
* willing to return in a single READ operation.
+ *
+ * These happen to all be powers of 2, which is not strictly
+ * necessary but helps enforce the real limitation, which is
+ * that they should be multiples of PAGE_CACHE_SIZE.
+ *
+ * For UDP transports, a block plus NFS,RPC, and UDP headers
+ * has to fit into the IP datagram limit of 64K. The largest
+ * feasible number for all known page sizes is probably 48K,
+ * but we choose 32K here. This is the same as the historical
+ * Linux limit; someone who cares more about NFS/UDP performance
+ * can test a larger number.
+ *
+ * For TCP transports we have more freedom. A size of 1MB is
+ * chosen to match the client limit. Other OSes are known to
+ * have larger limits, but those numbers are probably beyond
+ * the point of diminishing returns.
*/
-#define RPCSVC_MAXPAYLOAD (64*1024u)
+#define RPCSVC_MAXPAYLOAD (1*1024*1024u)
+#define RPCSVC_MAXPAYLOAD_TCP RPCSVC_MAXPAYLOAD
+#define RPCSVC_MAXPAYLOAD_UDP (32*1024u)
+
+extern u32 svc_max_payload(const struct svc_rqst *rqstp);
/*
* RPC Requsts and replies are stored in one or more pages.
/*
* The context of a single thread, including the request currently being
* processed.
- * NOTE: First two items must be prev/next.
*/
struct svc_rqst {
struct list_head rq_list; /* idle list */
struct xdr_buf rq_arg;
struct xdr_buf rq_res;
- struct page * rq_argpages[RPCSVC_MAXPAGES];
- struct page * rq_respages[RPCSVC_MAXPAGES];
- int rq_restailpage;
- short rq_argused; /* pages used for argument */
- short rq_arghi; /* pages available in argument page list */
- short rq_resused; /* pages used for result */
+ struct page * rq_pages[RPCSVC_MAXPAGES];
+ struct page * *rq_respages; /* points into rq_pages */
+ int rq_resused; /* number of pages used for result */
+
+ struct kvec rq_vec[RPCSVC_MAXPAGES]; /* generally useful.. */
__be32 rq_xid; /* transmission id */
u32 rq_prog; /* program number */
return vec->iov_len <= PAGE_SIZE;
}
-static inline struct page *
-svc_take_res_page(struct svc_rqst *rqstp)
-{
- if (rqstp->rq_arghi <= rqstp->rq_argused)
- return NULL;
- rqstp->rq_arghi--;
- rqstp->rq_respages[rqstp->rq_resused] =
- rqstp->rq_argpages[rqstp->rq_arghi];
- return rqstp->rq_respages[rqstp->rq_resused++];
-}
-
-static inline void svc_take_page(struct svc_rqst *rqstp)
-{
- if (rqstp->rq_arghi <= rqstp->rq_argused) {
- WARN_ON(1);
- return;
- }
- rqstp->rq_arghi--;
- rqstp->rq_respages[rqstp->rq_resused] =
- rqstp->rq_argpages[rqstp->rq_arghi];
- rqstp->rq_resused++;
-}
-
-static inline void svc_pushback_allpages(struct svc_rqst *rqstp)
-{
- while (rqstp->rq_resused) {
- if (rqstp->rq_respages[--rqstp->rq_resused] == NULL)
- continue;
- rqstp->rq_argpages[rqstp->rq_arghi++] =
- rqstp->rq_respages[rqstp->rq_resused];
- rqstp->rq_respages[rqstp->rq_resused] = NULL;
- }
-}
-
-static inline void svc_pushback_unused_pages(struct svc_rqst *rqstp)
+static inline void svc_free_res_pages(struct svc_rqst *rqstp)
{
- while (rqstp->rq_resused &&
- rqstp->rq_res.pages != &rqstp->rq_respages[rqstp->rq_resused]) {
-
- if (rqstp->rq_respages[--rqstp->rq_resused] != NULL) {
- rqstp->rq_argpages[rqstp->rq_arghi++] =
- rqstp->rq_respages[rqstp->rq_resused];
- rqstp->rq_respages[rqstp->rq_resused] = NULL;
+ while (rqstp->rq_resused) {
+ struct page **pp = (rqstp->rq_respages +
+ --rqstp->rq_resused);
+ if (*pp) {
+ put_page(*pp);
+ *pp = NULL;
}
}
}
-static inline void svc_free_allpages(struct svc_rqst *rqstp)
-{
- while (rqstp->rq_resused) {
- if (rqstp->rq_respages[--rqstp->rq_resused] == NULL)
- continue;
- put_page(rqstp->rq_respages[rqstp->rq_resused]);
- rqstp->rq_respages[rqstp->rq_resused] = NULL;
- }
-}
-
struct svc_deferred_req {
u32 prot; /* protocol (UDP or TCP) */
struct sockaddr_in addr;
struct svc_procedure * vs_proc; /* per-procedure info */
u32 vs_xdrsize; /* xdrsize needed for this version */
+ unsigned int vs_hidden : 1; /* Don't register with portmapper.
+ * Only used for nfsacl so far. */
+
/* Override dispatch function (e.g. when caching replies).
* A return value of 0 means drop the request.
* vs_dispatch == NULL means use default dispatcher.
int svc_register(struct svc_serv *, int, unsigned short);
void svc_wake_up(struct svc_serv *);
void svc_reserve(struct svc_rqst *rqstp, int space);
+struct svc_pool * svc_pool_for_cpu(struct svc_serv *serv, int cpu);
#endif /* SUNRPC_SVC_H */
projects / linux-2.6 / blobdiff