diff options
Diffstat (limited to 'sys/fs/nfsclient/nfs_clbio.c')
| -rw-r--r-- | sys/fs/nfsclient/nfs_clbio.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/sys/fs/nfsclient/nfs_clbio.c b/sys/fs/nfsclient/nfs_clbio.c index 45a48cf..2649d95 100644 --- a/sys/fs/nfsclient/nfs_clbio.c +++ b/sys/fs/nfsclient/nfs_clbio.c @@ -78,6 +78,40 @@ static int nfs_directio_write(struct vnode *vp, struct uio *uiop, /* * Vnode op for VM getpages. */ +SYSCTL_DECL(_vfs_nfs); +static int use_buf_pager = 0; +SYSCTL_INT(_vfs_nfs, OID_AUTO, use_buf_pager, CTLFLAG_RWTUN, + &use_buf_pager, 0, + "Use buffer pager instead of direct readrpc call"); + +static daddr_t +ncl_gbp_getblkno(struct vnode *vp, vm_ooffset_t off) +{ + + return (off / vp->v_bufobj.bo_bsize); +} + +static int +ncl_gbp_getblksz(struct vnode *vp, daddr_t lbn) +{ + struct nfsnode *np; + u_quad_t nsize; + int biosize, bcount; + + np = VTONFS(vp); + mtx_lock(&np->n_mtx); + nsize = np->n_size; + mtx_unlock(&np->n_mtx); + + biosize = vp->v_bufobj.bo_bsize; + bcount = biosize; + if ((off_t)lbn * biosize >= nsize) + bcount = 0; + else if ((off_t)(lbn + 1) * biosize > nsize) + bcount = nsize - (off_t)lbn * biosize; + return (bcount); +} + int ncl_getpages(struct vop_getpages_args *ap) { @@ -126,6 +160,10 @@ ncl_getpages(struct vop_getpages_args *ap) } else mtx_unlock(&nmp->nm_mtx); + if (use_buf_pager) + return (vfs_bio_getpages(vp, pages, npages, ap->a_rbehind, + ap->a_rahead, ncl_gbp_getblkno, ncl_gbp_getblksz)); + /* * If the requested page is partially valid, just return it and * allow the pager to zero-out the blanks. Partially valid pages |
