From: Michael Vrable <mvrable@cs.ucsd.edu>
Date: Tue, 23 Feb 2010 01:12:14 +0000 (-0800)
Subject: Allow larger reads and writes.
X-Git-Url: http://git.vrable.net/?p=bluesky.git;a=commitdiff_plain;h=105feb97ef2173d6ea45df177599be6d4592640b

Allow larger reads and writes.

Support reads up to 1 MB now, instead of just 32 kB.
---

diff --git a/nfs3/nfs3.c b/nfs3/nfs3.c
index 2895e5b..818cd4b 100644
--- a/nfs3/nfs3.c
+++ b/nfs3/nfs3.c
@@ -9,6 +9,9 @@
 
 extern BlueSkyFS *fs;
 
+#define NFS_BLOCKSIZE 32768
+#define NFS_MAXSIZE (1 << 20)
+
 /* Check that a string is a valid file name.  We require that it be valid
  * UTF-8, that it not be empty, and that it not contain embedded forward
  * slashes.  Also checks that the length of the string is not more than the
@@ -323,7 +326,7 @@ void nfsproc3_read_3_svc(read3args *argp, RPCRequest *req)
 {
     read3res result;
     memset(&result, 0, sizeof(result));
-    char buf[32768];
+    char buf[NFS_MAXSIZE];
 
     BlueSkyInode *inode = lookup_fh(req, &argp->file);
     if (inode == NULL) {
@@ -340,6 +343,7 @@ void nfsproc3_read_3_svc(read3args *argp, RPCRequest *req)
         count = 0;
         result.read3res_u.resok.eof = TRUE;
     } else {
+        count = MIN(count, NFS_MAXSIZE);
         count = MIN(count, inode->size - argp->offset);
         if (argp->offset + count == inode->size)
             result.read3res_u.resok.eof = TRUE;
@@ -1048,13 +1052,13 @@ void nfsproc3_fsinfo_3_svc(nfs_fh3 *argp, RPCRequest *req)
     result.status = NFS3_OK;
     result.fsinfo3res_u.resok.obj_attributes.present = TRUE;
     encode_fattr3(&result.fsinfo3res_u.resok.obj_attributes.post_op_attr_u.attributes, inode);
-    result.fsinfo3res_u.resok.rtmax = 32768;
-    result.fsinfo3res_u.resok.rtpref = 32768;
-    result.fsinfo3res_u.resok.rtmult = 4096;
-    result.fsinfo3res_u.resok.wtmax = 32768;
-    result.fsinfo3res_u.resok.wtpref = 32768;
-    result.fsinfo3res_u.resok.wtmult = 4096;
-    result.fsinfo3res_u.resok.dtpref = 4096;
+    result.fsinfo3res_u.resok.rtmax = NFS_MAXSIZE;
+    result.fsinfo3res_u.resok.rtpref = NFS_MAXSIZE;
+    result.fsinfo3res_u.resok.rtmult = NFS_BLOCKSIZE;
+    result.fsinfo3res_u.resok.wtmax = NFS_MAXSIZE;
+    result.fsinfo3res_u.resok.wtpref = NFS_MAXSIZE;
+    result.fsinfo3res_u.resok.wtmult = NFS_BLOCKSIZE;
+    result.fsinfo3res_u.resok.dtpref = NFS_BLOCKSIZE;
     result.fsinfo3res_u.resok.maxfilesize = 0x7fffffffffffffffULL;
     result.fsinfo3res_u.resok.time_delta.seconds = 0;
     result.fsinfo3res_u.resok.time_delta.nseconds = 1000;