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-rw-r--r--include/linux/nfsd/const.h15
1 files changed, 14 insertions, 1 deletions
diff --git a/include/linux/nfsd/const.h b/include/linux/nfsd/const.h
index b75bb1b38d0..adbddf00789 100644
--- a/include/linux/nfsd/const.h
+++ b/include/linux/nfsd/const.h
@@ -13,6 +13,7 @@
#include <linux/nfs2.h>
#include <linux/nfs3.h>
#include <linux/nfs4.h>
+#include <linux/sunrpc/msg_prot.h>
/*
* Maximum protocol version supported by knfsd
@@ -23,6 +24,8 @@
* Maximum blocksize supported by daemon currently at 32K
*/
#define NFSSVC_MAXBLKSIZE (32*1024)
+/* NFSv2 is limited by the protocol specification, see RFC 1094 */
+#define NFSSVC_MAXBLKSIZE_V2 (8*1024)
#ifdef __KERNEL__
@@ -30,7 +33,17 @@
# define NFS_SUPER_MAGIC 0x6969
#endif
-#define NFSD_BUFSIZE (1024 + NFSSVC_MAXBLKSIZE)
+/*
+ * Largest number of bytes we need to allocate for an NFS
+ * call or reply. Used to control buffer sizes. We use
+ * the length of v3 WRITE, READDIR and READDIR replies
+ * which are an RPC header, up to 26 XDR units of reply
+ * data, and some page data.
+ *
+ * Note that accuracy here doesn't matter too much as the
+ * size is rounded up to a page size when allocating space.
+ */
+#define NFSD_BUFSIZE ((RPC_MAX_HEADER_WITH_AUTH+26)*XDR_UNIT + NFSSVC_MAXBLKSIZE)
#ifdef CONFIG_NFSD_V4
# define NFSSVC_XDRSIZE NFS4_SVC_XDRSIZE