[PATCH] knfsd: Allow max size of NFSd payload to be configured

The max possible is the maximum RPC payload.  The default depends on amount of
total memory.

The value can be set within reason as long as no nfsd threads are currently
running.  The value can also be ready, allowing the default to be determined
after nfsd has started.

Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

2 files changed, 3 insertions, 2 deletions

diff --git a/include/linux/nfsd/const.h b/include/linux/nfsd/const.h
index adbddf007898..f478066f9cd5 100644
--- a/include/linux/nfsd/const.h
+++ b/include/linux/nfsd/const.h
@@ -21,9 +21,9 @@
 #define NFSSVC_MAXVERS          3
 
 /*
- * Maximum blocksize supported by daemon currently at 32K
+ * Maximum blocksizes supported by daemon under various circumstances.
  */
-#define NFSSVC_MAXBLKSIZE       (32*1024)
+#define NFSSVC_MAXBLKSIZE       RPCSVC_MAXPAYLOAD
 /* NFSv2 is limited by the protocol specification, see RFC 1094 */
 #define NFSSVC_MAXBLKSIZE_V2    (8*1024)
 
diff --git a/include/linux/nfsd/nfsd.h b/include/linux/nfsd/nfsd.h
index e1dbc86c270b..259841bb2f6c 100644
--- a/include/linux/nfsd/nfsd.h
+++ b/include/linux/nfsd/nfsd.h
@@ -145,6 +145,7 @@ int nfsd_vers(int vers, enum vers_op change);
 void nfsd_reset_versions(void);
 int nfsd_create_serv(void);
 
+extern int nfsd_max_blksize;
 
 /* 
  * NFSv4 State