svn commit: r234061 - in stable/8/sys: fs/nfsclient i386/conf nfsclient

[Rick Macklem]

Author: rmacklem
Date: Mon Apr  9 15:34:23 2012
New Revision: 234061
URL: http://svn.freebsd.org/changeset/base/234061

Log:
  MFC: r232327
  Fix the NFS clients so that they use copyin() instead of bcopy(),
  when doing direct I/O. This direct I/O code is not enabled by default.

Modified:
  stable/8/sys/fs/nfsclient/nfs_clbio.c
  stable/8/sys/nfsclient/nfs_bio.c
Directory Properties:
  stable/8/sys/   (props changed)
  stable/8/sys/amd64/include/xen/   (props changed)
  stable/8/sys/boot/   (props changed)
  stable/8/sys/cddl/contrib/opensolaris/   (props changed)
  stable/8/sys/contrib/dev/acpica/   (props changed)
  stable/8/sys/contrib/pf/   (props changed)
  stable/8/sys/dev/e1000/   (props changed)
  stable/8/sys/i386/conf/XENHVM   (props changed)

Modified: stable/8/sys/fs/nfsclient/nfs_clbio.c
==============================================================================
--- stable/8/sys/fs/nfsclient/nfs_clbio.c	Mon Apr  9 15:34:22 2012	(r234060)
+++ stable/8/sys/fs/nfsclient/nfs_clbio.c	Mon Apr  9 15:34:23 2012	(r234061)
@@ -812,7 +812,21 @@ do_sync:
 			t_uio->uio_segflg = UIO_SYSSPACE;
 			t_uio->uio_rw = UIO_WRITE;
 			t_uio->uio_td = td;
-			bcopy(uiop->uio_iov->iov_base, t_iov->iov_base, size);
+			KASSERT(uiop->uio_segflg == UIO_USERSPACE ||
+			    uiop->uio_segflg == UIO_SYSSPACE,
+			    ("nfs_directio_write: Bad uio_segflg"));
+			if (uiop->uio_segflg == UIO_USERSPACE) {
+				error = copyin(uiop->uio_iov->iov_base,
+				    t_iov->iov_base, size);
+				if (error != 0)
+					goto err_free;
+			} else
+				/*
+				 * UIO_SYSSPACE may never happen, but handle
+				 * it just in case it does.
+				 */
+				bcopy(uiop->uio_iov->iov_base, t_iov->iov_base,
+				    size);
 			bp->b_flags |= B_DIRECT;
 			bp->b_iocmd = BIO_WRITE;
 			if (cred != NOCRED) {
@@ -823,6 +837,7 @@ do_sync:
 			bp->b_caller1 = (void *)t_uio;
 			bp->b_vp = vp;
 			error = ncl_asyncio(nmp, bp, NOCRED, td);
+err_free:
 			if (error) {
 				free(t_iov->iov_base, M_NFSDIRECTIO);
 				free(t_iov, M_NFSDIRECTIO);

Modified: stable/8/sys/nfsclient/nfs_bio.c
==============================================================================
--- stable/8/sys/nfsclient/nfs_bio.c	Mon Apr  9 15:34:22 2012	(r234060)
+++ stable/8/sys/nfsclient/nfs_bio.c	Mon Apr  9 15:34:23 2012	(r234061)
@@ -807,7 +807,21 @@ do_sync:
 			t_uio->uio_segflg = UIO_SYSSPACE;
 			t_uio->uio_rw = UIO_WRITE;
 			t_uio->uio_td = td;
-			bcopy(uiop->uio_iov->iov_base, t_iov->iov_base, size);
+			KASSERT(uiop->uio_segflg == UIO_USERSPACE ||
+			    uiop->uio_segflg == UIO_SYSSPACE,
+			    ("nfs_directio_write: Bad uio_segflg"));
+			if (uiop->uio_segflg == UIO_USERSPACE) {
+				error = copyin(uiop->uio_iov->iov_base,
+				    t_iov->iov_base, size);
+				if (error != 0)
+					goto err_free;
+			} else
+				/*
+				 * UIO_SYSSPACE may never happen, but handle
+				 * it just in case it does.
+				 */
+				bcopy(uiop->uio_iov->iov_base, t_iov->iov_base,
+				    size);
 			bp->b_flags |= B_DIRECT;
 			bp->b_iocmd = BIO_WRITE;
 			if (cred != NOCRED) {
@@ -818,6 +832,7 @@ do_sync:
 			bp->b_caller1 = (void *)t_uio;
 			bp->b_vp = vp;
 			error = nfs_asyncio(nmp, bp, NOCRED, td);
+err_free:
 			if (error) {
 				free(t_iov->iov_base, M_NFSDIRECTIO);
 				free(t_iov, M_NFSDIRECTIO);