[RFC][PATCH 3/3] nfsd:modify the nfsd's DRC to use sunrpc's universal DRC

Mi Jinlong
2009-10-27T03:30:09Z

Modify the nfsd's DRC to use sunrpc's universal DRC

Signed-off-by: Mi Jinlong <mijinlong@cn.fujitsu.com>
---
arch/parisc/kernel/sys_parisc32.c | 2 +-
arch/s390/kernel/compat_linux.c | 2 +-
arch/sparc/kernel/sys_sparc32.c | 2 +-
fs/nfsd/Makefile | 2 +-
fs/nfsd/nfs2acl.c | 2 +-
fs/nfsd/nfs3acl.c | 2 +-
fs/nfsd/nfs3proc.c | 2 +-
fs/nfsd/nfs4proc.c | 2 +-
fs/nfsd/nfs4state.c | 2 +-
fs/nfsd/nfscache.c | 330 -------------------------------------
fs/nfsd/nfsctl.c | 10 +-
fs/nfsd/nfsproc.c | 2 +-
fs/nfsd/nfssvc.c | 13 +-
fs/nfsd/stats.c | 9 +-
include/linux/nfsd/cache.h | 62 -------
include/linux/nfsd/stats.h | 3 -
16 files changed, 30 insertions(+), 417 deletions(-)
delete mode 100644 fs/nfsd/nfscache.c

diff --git a/arch/parisc/kernel/sys_parisc32.c b/arch/parisc/kernel/sys_parisc32.c
index 561388b..3c7498e 100644
--- a/arch/parisc/kernel/sys_parisc32.c
+++ b/arch/parisc/kernel/sys_parisc32.c
@@ -29,8 +29,8 @@
#include <linux/nfs_fs.h>
#include <linux/ncp_fs.h>
#include <linux/sunrpc/svc.h>
+#include <linux/sunrpc/drc.h>
#include <linux/nfsd/nfsd.h>
-#include <linux/nfsd/cache.h>
#include <linux/nfsd/xdr.h>
#include <linux/nfsd/syscall.h>
#include <linux/poll.h>
diff --git a/arch/s390/kernel/compat_linux.c b/arch/s390/kernel/compat_linux.c
index 0debcec..d441e48 100644
--- a/arch/s390/kernel/compat_linux.c
+++ b/arch/s390/kernel/compat_linux.c
@@ -35,8 +35,8 @@
#include <linux/quota.h>
#include <linux/module.h>
#include <linux/sunrpc/svc.h>
+#include <linux/sunrpc/drc.h>
#include <linux/nfsd/nfsd.h>
-#include <linux/nfsd/cache.h>
#include <linux/nfsd/xdr.h>
#include <linux/nfsd/syscall.h>
#include <linux/poll.h>
diff --git a/arch/sparc/kernel/sys_sparc32.c b/arch/sparc/kernel/sys_sparc32.c
index 04e28b2..dca7244 100644
--- a/arch/sparc/kernel/sys_sparc32.c
+++ b/arch/sparc/kernel/sys_sparc32.c
@@ -27,8 +27,8 @@
#include <linux/quota.h>
#include <linux/module.h>
#include <linux/sunrpc/svc.h>
+#include <linux/sunrpc/drc.h>
#include <linux/nfsd/nfsd.h>
-#include <linux/nfsd/cache.h>
#include <linux/nfsd/xdr.h>
#include <linux/nfsd/syscall.h>
#include <linux/poll.h>
diff --git a/fs/nfsd/Makefile b/fs/nfsd/Makefile
index 9b118ee..fdddb23 100644
--- a/fs/nfsd/Makefile
+++ b/fs/nfsd/Makefile
@@ -5,7 +5,7 @@
obj-$(CONFIG_NFSD) += nfsd.o

nfsd-y := nfssvc.o nfsctl.o nfsproc.o nfsfh.o vfs.o \
- export.o auth.o lockd.o nfscache.o nfsxdr.o stats.o
+ export.o auth.o lockd.o nfsxdr.o stats.o
nfsd-$(CONFIG_NFSD_V2_ACL) += nfs2acl.o
nfsd-$(CONFIG_NFSD_V3) += nfs3proc.o nfs3xdr.o
nfsd-$(CONFIG_NFSD_V3_ACL) += nfs3acl.o
diff --git a/fs/nfsd/nfs2acl.c b/fs/nfsd/nfs2acl.c
index 4e3219e..06c7293 100644
--- a/fs/nfsd/nfs2acl.c
+++ b/fs/nfsd/nfs2acl.c
@@ -7,9 +7,9 @@
*/

#include <linux/sunrpc/svc.h>
+#include <linux/sunrpc/drc.h>
#include <linux/nfs.h>
#include <linux/nfsd/nfsd.h>
-#include <linux/nfsd/cache.h>
#include <linux/nfsd/xdr.h>
#include <linux/nfsd/xdr3.h>
#include <linux/posix_acl.h>
diff --git a/fs/nfsd/nfs3acl.c b/fs/nfsd/nfs3acl.c
index 9981dbb..f6527d3 100644
--- a/fs/nfsd/nfs3acl.c
+++ b/fs/nfsd/nfs3acl.c
@@ -7,9 +7,9 @@
*/

#include <linux/sunrpc/svc.h>
+#include <linux/sunrpc/drc.h>
#include <linux/nfs3.h>
#include <linux/nfsd/nfsd.h>
-#include <linux/nfsd/cache.h>
#include <linux/nfsd/xdr3.h>
#include <linux/posix_acl.h>
#include <linux/nfsacl.h>
diff --git a/fs/nfsd/nfs3proc.c b/fs/nfsd/nfs3proc.c
index a713c41..932a343 100644
--- a/fs/nfsd/nfs3proc.c
+++ b/fs/nfsd/nfs3proc.c
@@ -21,8 +21,8 @@
#include <linux/magic.h>

#include <linux/sunrpc/svc.h>
+#include <linux/sunrpc/drc.h>
#include <linux/nfsd/nfsd.h>
-#include <linux/nfsd/cache.h>
#include <linux/nfsd/xdr3.h>
#include <linux/nfs3.h>

diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index bebc0c2..5ad2212 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -41,8 +41,8 @@
#include <linux/file.h>

#include <linux/sunrpc/svc.h>
+#include <linux/sunrpc/drc.h>
#include <linux/nfsd/nfsd.h>
-#include <linux/nfsd/cache.h>
#include <linux/nfs4.h>
#include <linux/nfsd/state.h>
#include <linux/nfsd/xdr4.h>
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 2153f9b..efde9c8 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -39,8 +39,8 @@
#include <linux/slab.h>

#include <linux/sunrpc/svc.h>
+#include <linux/sunrpc/drc.h>
#include <linux/nfsd/nfsd.h>
-#include <linux/nfsd/cache.h>
#include <linux/file.h>
#include <linux/mount.h>
#include <linux/workqueue.h>
diff --git a/fs/nfsd/nfscache.c b/fs/nfsd/nfscache.c
deleted file mode 100644
index 4638635..0000000
--- a/fs/nfsd/nfscache.c
+++ /dev/null
@@ -1,330 +0,0 @@
-/*
- * linux/fs/nfsd/nfscache.c
- *
- * Request reply cache. This is currently a global cache, but this may
- * change in the future and be a per-client cache.
- *
- * This code is heavily inspired by the 44BSD implementation, although
- * it does things a bit differently.
- *
- * Copyright (C) 1995, 1996 Olaf Kirch <okir-pn4DOG8n3UYbFoVRYvo4fw@public.gmane.org>
- */
-
-#include <linux/kernel.h>
-#include <linux/time.h>
-#include <linux/slab.h>
-#include <linux/string.h>
-#include <linux/spinlock.h>
-#include <linux/list.h>
-
-#include <linux/sunrpc/svc.h>
-#include <linux/nfsd/nfsd.h>
-#include <linux/nfsd/cache.h>
-
-/* Size of reply cache. Common values are:
- * 4.3BSD: 128
- * 4.4BSD: 256
- * Solaris2: 1024
- * DEC Unix: 512-4096
- */
-#define CACHESIZE 1024
-#define HASHSIZE 64
-
-static struct hlist_head * cache_hash;
-static struct list_head lru_head;
-static int cache_disabled = 1;
-
-/*
- * Calculate the hash index from an XID.
- */
-static inline u32 request_hash(u32 xid)
-{
- u32 h = xid;
- h ^= (xid >> 24);
- return h & (HASHSIZE-1);
-}
-
-static int nfsd_cache_append(struct svc_rqst *rqstp, struct kvec *vec);
-
-/*
- * locking for the reply cache:
- * A cache entry is "single use" if c_state == RC_INPROG
- * Otherwise, it when accessing _prev or _next, the lock must be held.
- */
-static DEFINE_SPINLOCK(cache_lock);
-
-int nfsd_reply_cache_init(void)
-{
- struct svc_cacherep *rp;
- int i;
-
- INIT_LIST_HEAD(&lru_head);
- i = CACHESIZE;
- while (i) {
- rp = kmalloc(sizeof(*rp), GFP_KERNEL);
- if (!rp)
- goto out_nomem;
- list_add(&rp->c_lru, &lru_head);
- rp->c_state = RC_UNUSED;
- rp->c_type = RC_NOCACHE;
- INIT_HLIST_NODE(&rp->c_hash);
- i--;
- }
-
- cache_hash = kcalloc (HASHSIZE, sizeof(struct hlist_head), GFP_KERNEL);
- if (!cache_hash)
- goto out_nomem;
-
- cache_disabled = 0;
- return 0;
-out_nomem:
- printk(KERN_ERR "nfsd: failed to allocate reply cache\n");
- nfsd_reply_cache_shutdown();
- return -ENOMEM;
-}
-
-void nfsd_reply_cache_shutdown(void)
-{
- struct svc_cacherep *rp;
-
- while (!list_empty(&lru_head)) {
- rp = list_entry(lru_head.next, struct svc_cacherep, c_lru);
- if (rp->c_state == RC_DONE && rp->c_type == RC_REPLBUFF)
- kfree(rp->c_replvec.iov_base);
- list_del(&rp->c_lru);
- kfree(rp);
- }
-
- cache_disabled = 1;
-
- kfree (cache_hash);
- cache_hash = NULL;
-}
-
-/*
- * Move cache entry to end of LRU list
- */
-static void
-lru_put_end(struct svc_cacherep *rp)
-{
- list_move_tail(&rp->c_lru, &lru_head);
-}
-
-/*
- * Move a cache entry from one hash list to another
- */
-static void
-hash_refile(struct svc_cacherep *rp)
-{
- hlist_del_init(&rp->c_hash);
- hlist_add_head(&rp->c_hash, cache_hash + request_hash(rp->c_xid));
-}
-
-/*
- * Try to find an entry matching the current call in the cache. When none
- * is found, we grab the oldest unlocked entry off the LRU list.
- * Note that no operation within the loop may sleep.
- */
-int
-nfsd_cache_lookup(struct svc_rqst *rqstp, int type)
-{
- struct hlist_node *hn;
- struct hlist_head *rh;
- struct svc_cacherep *rp;
- __be32 xid = rqstp->rq_xid;
- u32 proto = rqstp->rq_prot,
- vers = rqstp->rq_vers,
- proc = rqstp->rq_proc;
- unsigned long age;
- int rtn;
-
- rqstp->rq_cacherep = NULL;
- if (cache_disabled || type == RC_NOCACHE) {
- nfsdstats.rcnocache++;
- return RC_DOIT;
- }
-
- spin_lock(&cache_lock);
- rtn = RC_DOIT;
-
- rh = &cache_hash[request_hash(xid)];
- hlist_for_each_entry(rp, hn, rh, c_hash) {
- if (rp->c_state != RC_UNUSED &&
- xid == rp->c_xid && proc == rp->c_proc &&
- proto == rp->c_prot && vers == rp->c_vers &&
- time_before(jiffies, rp->c_timestamp + 120*HZ) &&
- memcmp((char*)&rqstp->rq_addr, (char*)&rp->c_addr, sizeof(rp->c_addr))==0) {
- nfsdstats.rchits++;
- goto found_entry;
- }
- }
- nfsdstats.rcmisses++;
-
- /* This loop shouldn't take more than a few iterations normally */
- {
- int safe = 0;
- list_for_each_entry(rp, &lru_head, c_lru) {
- if (rp->c_state != RC_INPROG)
- break;
- if (safe++ > CACHESIZE) {
- printk("nfsd: loop in repcache LRU list\n");
- cache_disabled = 1;
- goto out;
- }
- }
- }
-
- /* All entries on the LRU are in-progress. This should not happen */
- if (&rp->c_lru == &lru_head) {
- static int complaints;
-
- printk(KERN_WARNING "nfsd: all repcache entries locked!\n");
- if (++complaints > 5) {
- printk(KERN_WARNING "nfsd: disabling repcache.\n");
- cache_disabled = 1;
- }
- goto out;
- }
-
- rqstp->rq_cacherep = rp;
- rp->c_state = RC_INPROG;
- rp->c_xid = xid;
- rp->c_proc = proc;
- memcpy(&rp->c_addr, svc_addr_in(rqstp), sizeof(rp->c_addr));
- rp->c_prot = proto;
- rp->c_vers = vers;
- rp->c_timestamp = jiffies;
-
- hash_refile(rp);
-
- /* release any buffer */
- if (rp->c_type == RC_REPLBUFF) {
- kfree(rp->c_replvec.iov_base);
- rp->c_replvec.iov_base = NULL;
- }
- rp->c_type = RC_NOCACHE;
- out:
- spin_unlock(&cache_lock);
- return rtn;
-
-found_entry:
- /* We found a matching entry which is either in progress or done. */
- age = jiffies - rp->c_timestamp;
- rp->c_timestamp = jiffies;
- lru_put_end(rp);
-
- rtn = RC_DROPIT;
- /* Request being processed or excessive rexmits */
- if (rp->c_state == RC_INPROG || age < RC_DELAY)
- goto out;
-
- /* From the hall of fame of impractical attacks:
- * Is this a user who tries to snoop on the cache? */
- rtn = RC_DOIT;
- if (!rqstp->rq_secure && rp->c_secure)
- goto out;
-
- /* Compose RPC reply header */
- switch (rp->c_type) {
- case RC_NOCACHE:
- break;
- case RC_REPLSTAT:
- svc_putu32(&rqstp->rq_res.head[0], rp->c_replstat);
- rtn = RC_REPLY;
- break;
- case RC_REPLBUFF:
- if (!nfsd_cache_append(rqstp, &rp->c_replvec))
- goto out; /* should not happen */
- rtn = RC_REPLY;
- break;
- default:
- printk(KERN_WARNING "nfsd: bad repcache type %d\n", rp->c_type);
- rp->c_state = RC_UNUSED;
- }
-
- goto out;
-}
-
-/*
- * Update a cache entry. This is called from nfsd_dispatch when
- * the procedure has been executed and the complete reply is in
- * rqstp->rq_res.
- *
- * We're copying around data here rather than swapping buffers because
- * the toplevel loop requires max-sized buffers, which would be a waste
- * of memory for a cache with a max reply size of 100 bytes (diropokres).
- *
- * If we should start to use different types of cache entries tailored
- * specifically for attrstat and fh's, we may save even more space.
- *
- * Also note that a cachetype of RC_NOCACHE can legally be passed when
- * nfsd failed to encode a reply that otherwise would have been cached.
- * In this case, nfsd_cache_update is called with statp == NULL.
- */
-void
-nfsd_cache_update(struct svc_rqst *rqstp, int cachetype, __be32 *statp)
-{
- struct svc_cacherep *rp;
- struct kvec *resv = &rqstp->rq_res.head[0], *cachv;
- int len;
-
- if (!(rp = rqstp->rq_cacherep) || cache_disabled)
- return;
-
- len = resv->iov_len - ((char*)statp - (char*)resv->iov_base);
- len >>= 2;
-
- /* Don't cache excessive amounts of data and XDR failures */
- if (!statp || len > (256 >> 2)) {
- rp->c_state = RC_UNUSED;
- return;
- }
-
- switch (cachetype) {
- case RC_REPLSTAT:
- if (len != 1)
- printk("nfsd: RC_REPLSTAT/reply len %d!\n",len);
- rp->c_replstat = *statp;
- break;
- case RC_REPLBUFF:
- cachv = &rp->c_replvec;
- cachv->iov_base = kmalloc(len << 2, GFP_KERNEL);
- if (!cachv->iov_base) {
- spin_lock(&cache_lock);
- rp->c_state = RC_UNUSED;
- spin_unlock(&cache_lock);
- return;
- }
- cachv->iov_len = len << 2;
- memcpy(cachv->iov_base, statp, len << 2);
- break;
- }
- spin_lock(&cache_lock);
- lru_put_end(rp);
- rp->c_secure = rqstp->rq_secure;
- rp->c_type = cachetype;
- rp->c_state = RC_DONE;
- rp->c_timestamp = jiffies;
- spin_unlock(&cache_lock);
- return;
-}
-
-/*
- * Copy cached reply to current reply buffer. Should always fit.
- * FIXME as reply is in a page, we should just attach the page, and
- * keep a refcount....
- */
-static int
-nfsd_cache_append(struct svc_rqst *rqstp, struct kvec *data)
-{
- struct kvec *vec = &rqstp->rq_res.head[0];
-
- if (vec->iov_len + data->iov_len > PAGE_SIZE) {
- printk(KERN_WARNING "nfsd: cached reply too large (%Zd).\n",
- data->iov_len);
- return 0;
- }
- memcpy((char*)vec->iov_base + vec->iov_len, data->iov_base, data->iov_len);
- vec->iov_len += data->iov_len;
- return 1;
-}
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index 5c01fc1..100bb9f 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -31,9 +31,9 @@
#include <linux/nfsd_idmap.h>
#include <linux/lockd/bind.h>
#include <linux/sunrpc/svc.h>
+#include <linux/sunrpc/drc.h>
#include <linux/sunrpc/svcsock.h>
#include <linux/nfsd/nfsd.h>
-#include <linux/nfsd/cache.h>
#include <linux/nfsd/xdr.h>
#include <linux/nfsd/syscall.h>
#include <linux/lockd/lockd.h>
@@ -42,6 +42,8 @@
#include <asm/uaccess.h>
#include <net/ipv6.h>

+struct drc_cache nfsd_dc;
+
/*
* We have a single directory with 9 nodes in it.
*/
@@ -1392,7 +1394,7 @@ static int __init init_nfsd(void)
if (retval)
return retval;
nfsd_stat_init(); /* Statistics */
- retval = nfsd_reply_cache_init();
+ retval = drc_reply_cache_init(&nfsd_dc);
if (retval)
goto out_free_stat;
retval = nfsd_export_init();
@@ -1418,7 +1420,7 @@ out_free_lockd:
nfsd_lockd_shutdown();
nfsd_export_shutdown();
out_free_cache:
- nfsd_reply_cache_shutdown();
+ drc_reply_cache_shutdown(&nfsd_dc);
out_free_stat:
nfsd_stat_shutdown();
nfsd4_free_slabs();
@@ -1428,7 +1430,7 @@ out_free_stat:
static void __exit exit_nfsd(void)
{
nfsd_export_shutdown();
- nfsd_reply_cache_shutdown();
+ drc_reply_cache_shutdown(&nfsd_dc);
remove_proc_entry("fs/nfs/exports", NULL);
remove_proc_entry("fs/nfs", NULL);
nfsd_stat_shutdown();
diff --git a/fs/nfsd/nfsproc.c b/fs/nfsd/nfsproc.c
index 0eb9c82..4be2996 100644
--- a/fs/nfsd/nfsproc.c
+++ b/fs/nfsd/nfsproc.c
@@ -21,8 +21,8 @@

#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/svc.h>
+#include <linux/sunrpc/drc.h>
#include <linux/nfsd/nfsd.h>
-#include <linux/nfsd/cache.h>
#include <linux/nfsd/xdr.h>

typedef struct svc_rqst svc_rqst;
diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c
index 67ea83e..6206018 100644
--- a/fs/nfsd/nfssvc.c
+++ b/fs/nfsd/nfssvc.c
@@ -26,6 +26,7 @@
#include <linux/sunrpc/types.h>
#include <linux/sunrpc/stats.h>
#include <linux/sunrpc/svc.h>
+#include <linux/sunrpc/drc.h>
#include <linux/sunrpc/svcsock.h>
#include <linux/sunrpc/cache.h>
#include <linux/nfsd/nfsd.h>
@@ -42,6 +43,8 @@ extern struct svc_program nfsd_program;
static int nfsd(void *vrqstp);
struct timeval nfssvc_boot;

+extern struct drc_cache nfsd_dc;
+
/*
* nfsd_mutex protects nfsd_serv -- both the pointer itself and the members
* of the svc_serv struct. In particular, ->sv_nrthreads but also to some
@@ -554,7 +557,7 @@ nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp)
proc = rqstp->rq_procinfo;

/* Check whether we have this call in the cache. */
- switch (nfsd_cache_lookup(rqstp, proc->pc_cachetype)) {
+ switch (drc_cache_lookup(rqstp, proc->pc_cachetype, &nfsd_dc)) {
case RC_INTR:
case RC_DROPIT:
return 0;
@@ -569,7 +572,7 @@ nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp)
if (xdr && !xdr(rqstp, (__be32*)rqstp->rq_arg.head[0].iov_base,
rqstp->rq_argp)) {
dprintk("nfsd: failed to decode arguments!\n");
- nfsd_cache_update(rqstp, RC_NOCACHE, NULL);
+ drc_cache_update(rqstp, RC_NOCACHE, NULL, &nfsd_dc);
*statp = rpc_garbage_args;
return 1;
}
@@ -586,7 +589,7 @@ nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp)
nfserr = map_new_errors(rqstp->rq_vers, nfserr);
if (nfserr == nfserr_dropit) {
dprintk("nfsd: Dropping request; may be revisited later\n");
- nfsd_cache_update(rqstp, RC_NOCACHE, NULL);
+ drc_cache_update(rqstp, RC_NOCACHE, NULL, &nfsd_dc);
return 0;
}

@@ -602,14 +605,14 @@ nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp)
rqstp->rq_resp)) {
/* Failed to encode result. Release cache entry */
dprintk("nfsd: failed to encode result!\n");
- nfsd_cache_update(rqstp, RC_NOCACHE, NULL);
+ drc_cache_update(rqstp, RC_NOCACHE, NULL, &nfsd_dc);
*statp = rpc_system_err;
return 1;
}
}

/* Store reply in cache. */
- nfsd_cache_update(rqstp, proc->pc_cachetype, statp + 1);
+ drc_cache_update(rqstp, proc->pc_cachetype, statp + 1, &nfsd_dc);
return 1;
}

diff --git a/fs/nfsd/stats.c b/fs/nfsd/stats.c
index 71944cd..c671a1e 100644
--- a/fs/nfsd/stats.c
+++ b/fs/nfsd/stats.c
@@ -31,10 +31,13 @@
#include <linux/module.h>

#include <linux/sunrpc/svc.h>
+#include <linux/sunrpc/drc.h>
#include <linux/sunrpc/stats.h>
#include <linux/nfsd/nfsd.h>
#include <linux/nfsd/stats.h>

+extern struct drc_cache nfsd_dc;
+
struct nfsd_stats nfsdstats;
struct svc_stat nfsd_svcstats = {
.program = &nfsd_program,
@@ -45,9 +48,9 @@ static int nfsd_proc_show(struct seq_file *seq, void *v)
int i;

seq_printf(seq, "rc %u %u %u\nfh %u %u %u %u %u\nio %u %u\n",
- nfsdstats.rchits,
- nfsdstats.rcmisses,
- nfsdstats.rcnocache,
+ nfsd_dc.rchits,
+ nfsd_dc.rcmisses,
+ nfsd_dc.rcnocache,
nfsdstats.fh_stale,
nfsdstats.fh_lookup,
nfsdstats.fh_anon,
diff --git a/include/linux/nfsd/cache.h b/include/linux/nfsd/cache.h
index 3a3f589..a8cbcde 100644
--- a/include/linux/nfsd/cache.h
+++ b/include/linux/nfsd/cache.h
@@ -13,68 +13,6 @@
#include <linux/in.h>
#include <linux/uio.h>

-/*
- * Representation of a reply cache entry.
- */
-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;
- __be32 c_xid;
- u32 c_prot;
- u32 c_proc;
- u32 c_vers;
- unsigned long c_timestamp;
- union {
- struct kvec u_vec;
- __be32 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)
-
-int nfsd_reply_cache_init(void);
-void nfsd_reply_cache_shutdown(void);
-int nfsd_cache_lookup(struct svc_rqst *, int);
-void nfsd_cache_update(struct svc_rqst *, int, __be32 *);
-
#ifdef CONFIG_NFSD_V4
void nfsd4_set_statp(struct svc_rqst *rqstp, __be32 *statp);
#else /* CONFIG_NFSD_V4 */
diff --git a/include/linux/nfsd/stats.h b/include/linux/nfsd/stats.h
index 2693ef6..7c5bf0e 100644
--- a/include/linux/nfsd/stats.h
+++ b/include/linux/nfsd/stats.h
@@ -17,9 +17,6 @@
#ifdef __KERNEL__

struct nfsd_stats {
- unsigned int rchits; /* repcache hits */
- unsigned int rcmisses; /* repcache hits */
- unsigned int rcnocache; /* uncached reqs */
unsigned int fh_stale; /* FH stale error */
unsigned int fh_lookup; /* dentry cached */
unsigned int fh_anon; /* anon file dentry returned */
--
1.6.2