[PATCH] knfsd: Correct reserved reply space for read requests.

NFSd makes sure there is enough space to hold the maximum possible reply
before accepting a request.  The units for this maximum is (4byte) words.
However in three places, particularly for read request, the number given is
a number of bytes.

This means too much space is reserved which is slightly wasteful.

This is the sort of patch that could uncover a deeper bug, and it is not
critical, so it would be best for it to spend a while in -mm before going
in to mainline.

(akpm: target 2.6.17-rc2, 2.6.16.3 (approx))

Discovered-by: "Eivind  Sarto" <ivan@kasenna.com>
Signed-off-by: Neil Brown <neilb@suse.de>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

3 files changed, 3 insertions, 3 deletions

diff --git a/fs/nfsd/nfs3proc.c b/fs/nfsd/nfs3proc.c
index 6d2dfed1de08..f61142afea44 100644
--- a/fs/nfsd/nfs3proc.c
+++ b/fs/nfsd/nfs3proc.c
@@ -682,7 +682,7 @@ static struct svc_procedure		nfsd_procedures3[22] = {
   PROC(lookup,   dirop,         dirop,          fhandle2, RC_NOCACHE, ST+FH+pAT+pAT),
   PROC(access,   access,        access,         fhandle,  RC_NOCACHE, ST+pAT+1),
   PROC(readlink, readlink,      readlink,       fhandle,  RC_NOCACHE, ST+pAT+1+NFS3_MAXPATHLEN/4),
-  PROC(read,     read,          read,           fhandle,  RC_NOCACHE, ST+pAT+4+NFSSVC_MAXBLKSIZE),
+  PROC(read,     read,          read,           fhandle,  RC_NOCACHE, ST+pAT+4+NFSSVC_MAXBLKSIZE/4),
   PROC(write,    write,         write,          fhandle,  RC_REPLBUFF, ST+WC+4),
   PROC(create,   create,        create,         fhandle2, RC_REPLBUFF, ST+(1+FH+pAT)+WC),
   PROC(mkdir,    mkdir,         create,         fhandle2, RC_REPLBUFF, ST+(1+FH+pAT)+WC),
diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index 6d63f1d9e5f5..ca8a4c410de3 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -975,7 +975,7 @@ struct nfsd4_voidargs { int dummy; };
  */
 static struct svc_procedure             nfsd_procedures4[2] = {
   PROC(null,     void,          void,           void,     RC_NOCACHE, 1),
-  PROC(compound, compound,      compound,       compound, RC_NOCACHE, NFSD_BUFSIZE)
+  PROC(compound, compound,      compound,       compound, RC_NOCACHE, NFSD_BUFSIZE/4)
 };
 
 struct svc_version      nfsd_version4 = {
diff --git a/fs/nfsd/nfsproc.c b/fs/nfsd/nfsproc.c
index 3e6b75cd90fd..06cd0db0f32b 100644
--- a/fs/nfsd/nfsproc.c
+++ b/fs/nfsd/nfsproc.c
@@ -553,7 +553,7 @@ static struct svc_procedure		nfsd_procedures2[18] = {
   PROC(none,     void,          void,           none,           RC_NOCACHE, ST),
   PROC(lookup,   diropargs,     diropres,       fhandle,        RC_NOCACHE, ST+FH+AT),
   PROC(readlink, readlinkargs,  readlinkres,    none,           RC_NOCACHE, ST+1+NFS_MAXPATHLEN/4),
-  PROC(read,     readargs,      readres,        fhandle,        RC_NOCACHE, ST+AT+1+NFSSVC_MAXBLKSIZE),
+  PROC(read,     readargs,      readres,        fhandle,        RC_NOCACHE, ST+AT+1+NFSSVC_MAXBLKSIZE/4),
   PROC(none,     void,          void,           none,           RC_NOCACHE, ST),
   PROC(write,    writeargs,     attrstat,       fhandle,        RC_REPLBUFF, ST+AT),
   PROC(create,   createargs,    diropres,       fhandle,        RC_REPLBUFF, ST+FH+AT),