Date: Fri, 27 Jan 2012 02:46:12 +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: r230605 - in head/sys: fs/nfsclient nfsclient Message-ID: <201201270246.q0R2kCpU017336@svn.freebsd.org>
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Author: rmacklem Date: Fri Jan 27 02:46:12 2012 New Revision: 230605 URL: http://svn.freebsd.org/changeset/base/230605 Log: A problem with respect to data read through the buffer cache for both NFS clients was reported to freebsd-fs@ under the subject "NFS corruption in recent HEAD" on Nov. 26, 2011. This problem occurred when a TCP mounted root fs was changed to using UDP. I believe that this problem was caused by the change in mnt_stat.f_iosize that occurred because rsize was decreased to the maximum supported by UDP. This patch fixes the problem by using v_bufobj.bo_bsize instead of f_iosize, since the latter is set to f_iosize when the vnode is allocated, but does not change for a given vnode when f_iosize changes. Reported by: pjd Reviewed by: kib MFC after: 2 weeks Modified: head/sys/fs/nfsclient/nfs_clbio.c head/sys/fs/nfsclient/nfs_clnode.c head/sys/fs/nfsclient/nfs_clport.c head/sys/nfsclient/nfs_bio.c Modified: head/sys/fs/nfsclient/nfs_clbio.c ============================================================================== --- head/sys/fs/nfsclient/nfs_clbio.c Fri Jan 27 02:13:27 2012 (r230604) +++ head/sys/fs/nfsclient/nfs_clbio.c Fri Jan 27 02:46:12 2012 (r230605) @@ -480,7 +480,7 @@ ncl_bioread(struct vnode *vp, struct uio /* No caching/ no readaheads. Just read data into the user buffer */ return ncl_readrpc(vp, uio, cred); - biosize = vp->v_mount->mnt_stat.f_iosize; + biosize = vp->v_bufobj.bo_bsize; seqcount = (int)((off_t)(ioflag >> IO_SEQSHIFT) * biosize / BKVASIZE); error = nfs_bioread_check_cons(vp, td, cred); @@ -960,7 +960,7 @@ flush_and_restart: if (vn_rlimit_fsize(vp, uio, td)) return (EFBIG); - biosize = vp->v_mount->mnt_stat.f_iosize; + biosize = vp->v_bufobj.bo_bsize; /* * Find all of this file's B_NEEDCOMMIT buffers. If our writes * would exceed the local maximum per-file write commit size when @@ -1264,12 +1264,8 @@ nfs_getcacheblk(struct vnode *vp, daddr_ bp = getblk(vp, bn, size, 0, 0, 0); } - if (vp->v_type == VREG) { - int biosize; - - biosize = mp->mnt_stat.f_iosize; - bp->b_blkno = bn * (biosize / DEV_BSIZE); - } + if (vp->v_type == VREG) + bp->b_blkno = bn * (vp->v_bufobj.bo_bsize / DEV_BSIZE); return (bp); } @@ -1785,7 +1781,7 @@ ncl_meta_setsize(struct vnode *vp, struc { struct nfsnode *np = VTONFS(vp); u_quad_t tsize; - int biosize = vp->v_mount->mnt_stat.f_iosize; + int biosize = vp->v_bufobj.bo_bsize; int error = 0; mtx_lock(&np->n_mtx); Modified: head/sys/fs/nfsclient/nfs_clnode.c ============================================================================== --- head/sys/fs/nfsclient/nfs_clnode.c Fri Jan 27 02:13:27 2012 (r230604) +++ head/sys/fs/nfsclient/nfs_clnode.c Fri Jan 27 02:46:12 2012 (r230605) @@ -136,6 +136,7 @@ ncl_nget(struct mount *mntp, u_int8_t *f return (error); } vp = nvp; + KASSERT(vp->v_bufobj.bo_bsize != 0, ("ncl_nget: bo_bsize == 0")); vp->v_bufobj.bo_ops = &buf_ops_newnfs; vp->v_data = np; np->n_vnode = vp; Modified: head/sys/fs/nfsclient/nfs_clport.c ============================================================================== --- head/sys/fs/nfsclient/nfs_clport.c Fri Jan 27 02:13:27 2012 (r230604) +++ head/sys/fs/nfsclient/nfs_clport.c Fri Jan 27 02:46:12 2012 (r230605) @@ -212,6 +212,7 @@ nfscl_nget(struct mount *mntp, struct vn return (error); } vp = nvp; + KASSERT(vp->v_bufobj.bo_bsize != 0, ("nfscl_nget: bo_bsize == 0")); vp->v_bufobj.bo_ops = &buf_ops_newnfs; vp->v_data = np; np->n_vnode = vp; Modified: head/sys/nfsclient/nfs_bio.c ============================================================================== --- head/sys/nfsclient/nfs_bio.c Fri Jan 27 02:13:27 2012 (r230604) +++ head/sys/nfsclient/nfs_bio.c Fri Jan 27 02:46:12 2012 (r230605) @@ -474,7 +474,7 @@ nfs_bioread(struct vnode *vp, struct uio /* No caching/ no readaheads. Just read data into the user buffer */ return nfs_readrpc(vp, uio, cred); - biosize = vp->v_mount->mnt_stat.f_iosize; + biosize = vp->v_bufobj.bo_bsize; seqcount = (int)((off_t)(ioflag >> IO_SEQSHIFT) * biosize / BKVASIZE); error = nfs_bioread_check_cons(vp, td, cred); @@ -951,7 +951,7 @@ flush_and_restart: if (vn_rlimit_fsize(vp, uio, td)) return (EFBIG); - biosize = vp->v_mount->mnt_stat.f_iosize; + biosize = vp->v_bufobj.bo_bsize; /* * Find all of this file's B_NEEDCOMMIT buffers. If our writes * would exceed the local maximum per-file write commit size when @@ -1255,12 +1255,8 @@ nfs_getcacheblk(struct vnode *vp, daddr_ bp = getblk(vp, bn, size, 0, 0, 0); } - if (vp->v_type == VREG) { - int biosize; - - biosize = mp->mnt_stat.f_iosize; - bp->b_blkno = bn * (biosize / DEV_BSIZE); - } + if (vp->v_type == VREG) + bp->b_blkno = bn * (vp->v_bufobj.bo_bsize / DEV_BSIZE); return (bp); } @@ -1767,7 +1763,7 @@ nfs_meta_setsize(struct vnode *vp, struc { struct nfsnode *np = VTONFS(vp); u_quad_t tsize; - int biosize = vp->v_mount->mnt_stat.f_iosize; + int biosize = vp->v_bufobj.bo_bsize; int error = 0; mtx_lock(&np->n_mtx);
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