Date: Thu, 1 Mar 2012 03:53:08 +0000 (UTC) From: Rick Macklem <rmacklem@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r232327 - in head/sys: fs/nfsclient nfsclient Message-ID: <201203010353.q213r8YQ059222@svn.freebsd.org>
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Author: rmacklem Date: Thu Mar 1 03:53:07 2012 New Revision: 232327 URL: http://svn.freebsd.org/changeset/base/232327 Log: 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. Submitted by: kib (earlier version) Reviewed by: kib MFC after: 1 week Modified: head/sys/fs/nfsclient/nfs_clbio.c head/sys/nfsclient/nfs_bio.c Modified: head/sys/fs/nfsclient/nfs_clbio.c ============================================================================== --- head/sys/fs/nfsclient/nfs_clbio.c Thu Mar 1 00:54:08 2012 (r232326) +++ head/sys/fs/nfsclient/nfs_clbio.c Thu Mar 1 03:53:07 2012 (r232327) @@ -820,7 +820,21 @@ 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) { @@ -831,6 +845,7 @@ 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: head/sys/nfsclient/nfs_bio.c ============================================================================== --- head/sys/nfsclient/nfs_bio.c Thu Mar 1 00:54:08 2012 (r232326) +++ head/sys/nfsclient/nfs_bio.c Thu Mar 1 03:53:07 2012 (r232327) @@ -814,7 +814,21 @@ 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) { @@ -825,6 +839,7 @@ 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);
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