3297 lines
83 KiB
C
3297 lines
83 KiB
C
/* $NetBSD: nfs_vnops.c,v 1.141 2001/10/13 23:25:58 simonb Exp $ */
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/*
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* Copyright (c) 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Rick Macklem at The University of Guelph.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)nfs_vnops.c 8.19 (Berkeley) 7/31/95
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*/
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/*
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* vnode op calls for Sun NFS version 2 and 3
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*/
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#include "opt_nfs.h"
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#include "opt_uvmhist.h"
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#include <sys/param.h>
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#include <sys/proc.h>
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#include <sys/kernel.h>
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#include <sys/systm.h>
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#include <sys/resourcevar.h>
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#include <sys/proc.h>
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#include <sys/mount.h>
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#include <sys/buf.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/namei.h>
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#include <sys/vnode.h>
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#include <sys/dirent.h>
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#include <sys/fcntl.h>
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#include <sys/lockf.h>
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#include <sys/stat.h>
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#include <sys/unistd.h>
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#include <uvm/uvm_extern.h>
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#include <uvm/uvm.h>
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#include <miscfs/fifofs/fifo.h>
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#include <miscfs/genfs/genfs.h>
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#include <miscfs/specfs/specdev.h>
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#include <nfs/rpcv2.h>
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#include <nfs/nfsproto.h>
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#include <nfs/nfs.h>
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#include <nfs/nfsnode.h>
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#include <nfs/nfsmount.h>
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#include <nfs/xdr_subs.h>
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#include <nfs/nfsm_subs.h>
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#include <nfs/nqnfs.h>
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#include <nfs/nfs_var.h>
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#include <net/if.h>
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#include <netinet/in.h>
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#include <netinet/in_var.h>
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/* Defs */
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#define TRUE 1
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#define FALSE 0
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/*
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* Global vfs data structures for nfs
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*/
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int (**nfsv2_vnodeop_p) __P((void *));
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const struct vnodeopv_entry_desc nfsv2_vnodeop_entries[] = {
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{ &vop_default_desc, vn_default_error },
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{ &vop_lookup_desc, nfs_lookup }, /* lookup */
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{ &vop_create_desc, nfs_create }, /* create */
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{ &vop_mknod_desc, nfs_mknod }, /* mknod */
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{ &vop_open_desc, nfs_open }, /* open */
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{ &vop_close_desc, nfs_close }, /* close */
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{ &vop_access_desc, nfs_access }, /* access */
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{ &vop_getattr_desc, nfs_getattr }, /* getattr */
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{ &vop_setattr_desc, nfs_setattr }, /* setattr */
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{ &vop_read_desc, nfs_read }, /* read */
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{ &vop_write_desc, nfs_write }, /* write */
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{ &vop_lease_desc, nfs_lease_check }, /* lease */
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{ &vop_fcntl_desc, genfs_fcntl }, /* fcntl */
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{ &vop_ioctl_desc, nfs_ioctl }, /* ioctl */
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{ &vop_poll_desc, nfs_poll }, /* poll */
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{ &vop_revoke_desc, nfs_revoke }, /* revoke */
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{ &vop_mmap_desc, nfs_mmap }, /* mmap */
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{ &vop_fsync_desc, nfs_fsync }, /* fsync */
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{ &vop_seek_desc, nfs_seek }, /* seek */
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{ &vop_remove_desc, nfs_remove }, /* remove */
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{ &vop_link_desc, nfs_link }, /* link */
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{ &vop_rename_desc, nfs_rename }, /* rename */
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{ &vop_mkdir_desc, nfs_mkdir }, /* mkdir */
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{ &vop_rmdir_desc, nfs_rmdir }, /* rmdir */
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{ &vop_symlink_desc, nfs_symlink }, /* symlink */
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{ &vop_readdir_desc, nfs_readdir }, /* readdir */
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{ &vop_readlink_desc, nfs_readlink }, /* readlink */
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{ &vop_abortop_desc, nfs_abortop }, /* abortop */
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{ &vop_inactive_desc, nfs_inactive }, /* inactive */
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{ &vop_reclaim_desc, nfs_reclaim }, /* reclaim */
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{ &vop_lock_desc, nfs_lock }, /* lock */
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{ &vop_unlock_desc, nfs_unlock }, /* unlock */
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{ &vop_bmap_desc, nfs_bmap }, /* bmap */
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{ &vop_strategy_desc, nfs_strategy }, /* strategy */
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{ &vop_print_desc, nfs_print }, /* print */
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{ &vop_islocked_desc, nfs_islocked }, /* islocked */
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{ &vop_pathconf_desc, nfs_pathconf }, /* pathconf */
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{ &vop_advlock_desc, nfs_advlock }, /* advlock */
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{ &vop_blkatoff_desc, nfs_blkatoff }, /* blkatoff */
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{ &vop_valloc_desc, nfs_valloc }, /* valloc */
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{ &vop_reallocblks_desc, nfs_reallocblks }, /* reallocblks */
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{ &vop_vfree_desc, nfs_vfree }, /* vfree */
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{ &vop_truncate_desc, nfs_truncate }, /* truncate */
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{ &vop_update_desc, nfs_update }, /* update */
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{ &vop_bwrite_desc, nfs_bwrite }, /* bwrite */
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{ &vop_getpages_desc, nfs_getpages }, /* getpages */
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{ &vop_putpages_desc, genfs_putpages }, /* putpages */
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{ NULL, NULL }
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};
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const struct vnodeopv_desc nfsv2_vnodeop_opv_desc =
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{ &nfsv2_vnodeop_p, nfsv2_vnodeop_entries };
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/*
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* Special device vnode ops
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*/
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int (**spec_nfsv2nodeop_p) __P((void *));
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const struct vnodeopv_entry_desc spec_nfsv2nodeop_entries[] = {
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{ &vop_default_desc, vn_default_error },
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{ &vop_lookup_desc, spec_lookup }, /* lookup */
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{ &vop_create_desc, spec_create }, /* create */
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{ &vop_mknod_desc, spec_mknod }, /* mknod */
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{ &vop_open_desc, spec_open }, /* open */
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{ &vop_close_desc, nfsspec_close }, /* close */
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{ &vop_access_desc, nfsspec_access }, /* access */
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{ &vop_getattr_desc, nfs_getattr }, /* getattr */
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{ &vop_setattr_desc, nfs_setattr }, /* setattr */
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{ &vop_read_desc, nfsspec_read }, /* read */
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{ &vop_write_desc, nfsspec_write }, /* write */
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{ &vop_lease_desc, spec_lease_check }, /* lease */
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{ &vop_fcntl_desc, genfs_fcntl }, /* fcntl */
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{ &vop_ioctl_desc, spec_ioctl }, /* ioctl */
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{ &vop_poll_desc, spec_poll }, /* poll */
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{ &vop_revoke_desc, spec_revoke }, /* revoke */
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{ &vop_mmap_desc, spec_mmap }, /* mmap */
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{ &vop_fsync_desc, spec_fsync }, /* fsync */
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{ &vop_seek_desc, spec_seek }, /* seek */
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{ &vop_remove_desc, spec_remove }, /* remove */
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{ &vop_link_desc, spec_link }, /* link */
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{ &vop_rename_desc, spec_rename }, /* rename */
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{ &vop_mkdir_desc, spec_mkdir }, /* mkdir */
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{ &vop_rmdir_desc, spec_rmdir }, /* rmdir */
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{ &vop_symlink_desc, spec_symlink }, /* symlink */
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{ &vop_readdir_desc, spec_readdir }, /* readdir */
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{ &vop_readlink_desc, spec_readlink }, /* readlink */
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{ &vop_abortop_desc, spec_abortop }, /* abortop */
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{ &vop_inactive_desc, nfs_inactive }, /* inactive */
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{ &vop_reclaim_desc, nfs_reclaim }, /* reclaim */
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{ &vop_lock_desc, nfs_lock }, /* lock */
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{ &vop_unlock_desc, nfs_unlock }, /* unlock */
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{ &vop_bmap_desc, spec_bmap }, /* bmap */
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{ &vop_strategy_desc, spec_strategy }, /* strategy */
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{ &vop_print_desc, nfs_print }, /* print */
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{ &vop_islocked_desc, nfs_islocked }, /* islocked */
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{ &vop_pathconf_desc, spec_pathconf }, /* pathconf */
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{ &vop_advlock_desc, spec_advlock }, /* advlock */
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{ &vop_blkatoff_desc, spec_blkatoff }, /* blkatoff */
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{ &vop_valloc_desc, spec_valloc }, /* valloc */
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{ &vop_reallocblks_desc, spec_reallocblks }, /* reallocblks */
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{ &vop_vfree_desc, spec_vfree }, /* vfree */
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{ &vop_truncate_desc, spec_truncate }, /* truncate */
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{ &vop_update_desc, nfs_update }, /* update */
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{ &vop_bwrite_desc, vn_bwrite }, /* bwrite */
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{ &vop_getpages_desc, spec_getpages }, /* getpages */
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{ &vop_putpages_desc, spec_putpages }, /* putpages */
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{ NULL, NULL }
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};
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const struct vnodeopv_desc spec_nfsv2nodeop_opv_desc =
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{ &spec_nfsv2nodeop_p, spec_nfsv2nodeop_entries };
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int (**fifo_nfsv2nodeop_p) __P((void *));
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const struct vnodeopv_entry_desc fifo_nfsv2nodeop_entries[] = {
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{ &vop_default_desc, vn_default_error },
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{ &vop_lookup_desc, fifo_lookup }, /* lookup */
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{ &vop_create_desc, fifo_create }, /* create */
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{ &vop_mknod_desc, fifo_mknod }, /* mknod */
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{ &vop_open_desc, fifo_open }, /* open */
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{ &vop_close_desc, nfsfifo_close }, /* close */
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{ &vop_access_desc, nfsspec_access }, /* access */
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{ &vop_getattr_desc, nfs_getattr }, /* getattr */
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{ &vop_setattr_desc, nfs_setattr }, /* setattr */
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{ &vop_read_desc, nfsfifo_read }, /* read */
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{ &vop_write_desc, nfsfifo_write }, /* write */
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{ &vop_lease_desc, fifo_lease_check }, /* lease */
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{ &vop_fcntl_desc, genfs_fcntl }, /* fcntl */
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{ &vop_ioctl_desc, fifo_ioctl }, /* ioctl */
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{ &vop_poll_desc, fifo_poll }, /* poll */
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{ &vop_revoke_desc, fifo_revoke }, /* revoke */
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{ &vop_mmap_desc, fifo_mmap }, /* mmap */
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{ &vop_fsync_desc, nfs_fsync }, /* fsync */
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{ &vop_seek_desc, fifo_seek }, /* seek */
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{ &vop_remove_desc, fifo_remove }, /* remove */
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{ &vop_link_desc, fifo_link }, /* link */
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{ &vop_rename_desc, fifo_rename }, /* rename */
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{ &vop_mkdir_desc, fifo_mkdir }, /* mkdir */
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{ &vop_rmdir_desc, fifo_rmdir }, /* rmdir */
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{ &vop_symlink_desc, fifo_symlink }, /* symlink */
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{ &vop_readdir_desc, fifo_readdir }, /* readdir */
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{ &vop_readlink_desc, fifo_readlink }, /* readlink */
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{ &vop_abortop_desc, fifo_abortop }, /* abortop */
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{ &vop_inactive_desc, nfs_inactive }, /* inactive */
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{ &vop_reclaim_desc, nfs_reclaim }, /* reclaim */
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{ &vop_lock_desc, nfs_lock }, /* lock */
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{ &vop_unlock_desc, nfs_unlock }, /* unlock */
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{ &vop_bmap_desc, fifo_bmap }, /* bmap */
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{ &vop_strategy_desc, genfs_badop }, /* strategy */
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{ &vop_print_desc, nfs_print }, /* print */
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{ &vop_islocked_desc, nfs_islocked }, /* islocked */
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{ &vop_pathconf_desc, fifo_pathconf }, /* pathconf */
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{ &vop_advlock_desc, fifo_advlock }, /* advlock */
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{ &vop_blkatoff_desc, fifo_blkatoff }, /* blkatoff */
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{ &vop_valloc_desc, fifo_valloc }, /* valloc */
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{ &vop_reallocblks_desc, fifo_reallocblks }, /* reallocblks */
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{ &vop_vfree_desc, fifo_vfree }, /* vfree */
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{ &vop_truncate_desc, fifo_truncate }, /* truncate */
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{ &vop_update_desc, nfs_update }, /* update */
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{ &vop_bwrite_desc, vn_bwrite }, /* bwrite */
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{ &vop_putpages_desc, fifo_putpages }, /* putpages */
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{ NULL, NULL }
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};
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const struct vnodeopv_desc fifo_nfsv2nodeop_opv_desc =
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{ &fifo_nfsv2nodeop_p, fifo_nfsv2nodeop_entries };
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/*
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* Global variables
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*/
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extern u_int32_t nfs_true, nfs_false;
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extern u_int32_t nfs_xdrneg1;
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extern struct nfsstats nfsstats;
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extern nfstype nfsv3_type[9];
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struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON];
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struct nfsmount *nfs_iodmount[NFS_MAXASYNCDAEMON];
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int nfs_numasync = 0;
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#define DIRHDSIZ (sizeof (struct dirent) - (MAXNAMLEN + 1))
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/*
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* nfs null call from vfs.
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*/
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int
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nfs_null(vp, cred, procp)
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struct vnode *vp;
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struct ucred *cred;
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struct proc *procp;
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{
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caddr_t bpos, dpos;
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int error = 0;
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struct mbuf *mreq, *mrep, *md, *mb;
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nfsm_reqhead(vp, NFSPROC_NULL, 0);
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nfsm_request(vp, NFSPROC_NULL, procp, cred);
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nfsm_reqdone;
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return (error);
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}
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/*
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* nfs access vnode op.
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* For nfs version 2, just return ok. File accesses may fail later.
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* For nfs version 3, use the access rpc to check accessibility. If file modes
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* are changed on the server, accesses might still fail later.
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*/
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int
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nfs_access(v)
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void *v;
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{
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struct vop_access_args /* {
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struct vnode *a_vp;
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int a_mode;
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struct ucred *a_cred;
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struct proc *a_p;
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} */ *ap = v;
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struct vnode *vp = ap->a_vp;
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u_int32_t *tl;
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caddr_t cp;
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int32_t t1, t2;
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caddr_t bpos, dpos, cp2;
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int error = 0, attrflag, cachevalid;
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struct mbuf *mreq, *mrep, *md, *mb, *mb2;
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u_int32_t mode, rmode;
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const int v3 = NFS_ISV3(vp);
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struct nfsnode *np = VTONFS(vp);
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cachevalid = (np->n_accstamp != -1 &&
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(time.tv_sec - np->n_accstamp) < NFS_ATTRTIMEO(np) &&
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np->n_accuid == ap->a_cred->cr_uid);
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/*
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* Check access cache first. If this request has been made for this
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* uid shortly before, use the cached result.
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*/
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if (cachevalid) {
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if (!np->n_accerror) {
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if ((np->n_accmode & ap->a_mode) == ap->a_mode)
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return np->n_accerror;
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} else if ((np->n_accmode & ap->a_mode) == np->n_accmode)
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return np->n_accerror;
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}
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/*
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* For nfs v3, do an access rpc, otherwise you are stuck emulating
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* ufs_access() locally using the vattr. This may not be correct,
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* since the server may apply other access criteria such as
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* client uid-->server uid mapping that we do not know about, but
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* this is better than just returning anything that is lying about
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* in the cache.
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*/
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if (v3) {
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nfsstats.rpccnt[NFSPROC_ACCESS]++;
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nfsm_reqhead(vp, NFSPROC_ACCESS, NFSX_FH(v3) + NFSX_UNSIGNED);
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nfsm_fhtom(vp, v3);
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nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
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if (ap->a_mode & VREAD)
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mode = NFSV3ACCESS_READ;
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else
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mode = 0;
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if (vp->v_type != VDIR) {
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if (ap->a_mode & VWRITE)
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mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND);
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if (ap->a_mode & VEXEC)
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mode |= NFSV3ACCESS_EXECUTE;
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} else {
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if (ap->a_mode & VWRITE)
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mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND |
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NFSV3ACCESS_DELETE);
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if (ap->a_mode & VEXEC)
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mode |= NFSV3ACCESS_LOOKUP;
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}
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*tl = txdr_unsigned(mode);
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nfsm_request(vp, NFSPROC_ACCESS, ap->a_p, ap->a_cred);
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nfsm_postop_attr(vp, attrflag);
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if (!error) {
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nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
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rmode = fxdr_unsigned(u_int32_t, *tl);
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/*
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* The NFS V3 spec does not clarify whether or not
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* the returned access bits can be a superset of
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* the ones requested, so...
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*/
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if ((rmode & mode) != mode)
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error = EACCES;
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}
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nfsm_reqdone;
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} else
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return (nfsspec_access(ap));
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/*
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* Disallow write attempts on filesystems mounted read-only;
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* unless the file is a socket, fifo, or a block or character
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* device resident on the filesystem.
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*/
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if (!error && (ap->a_mode & VWRITE) &&
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(vp->v_mount->mnt_flag & MNT_RDONLY)) {
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switch (vp->v_type) {
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case VREG:
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case VDIR:
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case VLNK:
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error = EROFS;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!error || error == EACCES) {
|
|
/*
|
|
* If we got the same result as for a previous,
|
|
* different request, OR it in. Don't update
|
|
* the timestamp in that case.
|
|
*/
|
|
if (cachevalid && error == np->n_accerror) {
|
|
if (!error)
|
|
np->n_accmode |= ap->a_mode;
|
|
else if ((np->n_accmode & ap->a_mode) == ap->a_mode)
|
|
np->n_accmode = ap->a_mode;
|
|
} else {
|
|
np->n_accstamp = time.tv_sec;
|
|
np->n_accuid = ap->a_cred->cr_uid;
|
|
np->n_accmode = ap->a_mode;
|
|
np->n_accerror = error;
|
|
}
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* nfs open vnode op
|
|
* Check to see if the type is ok
|
|
* and that deletion is not in progress.
|
|
* For paged in text files, you will need to flush the page cache
|
|
* if consistency is lost.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
nfs_open(v)
|
|
void *v;
|
|
{
|
|
struct vop_open_args /* {
|
|
struct vnode *a_vp;
|
|
int a_mode;
|
|
struct ucred *a_cred;
|
|
struct proc *a_p;
|
|
} */ *ap = v;
|
|
struct vnode *vp = ap->a_vp;
|
|
struct nfsnode *np = VTONFS(vp);
|
|
struct nfsmount *nmp = VFSTONFS(vp->v_mount);
|
|
struct vattr vattr;
|
|
int error;
|
|
|
|
if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) {
|
|
return (EACCES);
|
|
}
|
|
|
|
/*
|
|
* Initialize read and write creds here, for swapfiles
|
|
* and other paths that don't set the creds themselves.
|
|
*/
|
|
|
|
if (ap->a_mode & FREAD) {
|
|
if (np->n_rcred) {
|
|
crfree(np->n_rcred);
|
|
}
|
|
np->n_rcred = ap->a_cred;
|
|
crhold(np->n_rcred);
|
|
}
|
|
if (ap->a_mode & FWRITE) {
|
|
if (np->n_wcred) {
|
|
crfree(np->n_wcred);
|
|
}
|
|
np->n_wcred = ap->a_cred;
|
|
crhold(np->n_wcred);
|
|
}
|
|
|
|
#ifndef NFS_V2_ONLY
|
|
/*
|
|
* Get a valid lease. If cached data is stale, flush it.
|
|
*/
|
|
if (nmp->nm_flag & NFSMNT_NQNFS) {
|
|
if (NQNFS_CKINVALID(vp, np, ND_READ)) {
|
|
do {
|
|
error = nqnfs_getlease(vp, ND_READ, ap->a_cred,
|
|
ap->a_p);
|
|
} while (error == NQNFS_EXPIRED);
|
|
if (error)
|
|
return (error);
|
|
if (np->n_lrev != np->n_brev ||
|
|
(np->n_flag & NQNFSNONCACHE)) {
|
|
if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred,
|
|
ap->a_p, 1)) == EINTR)
|
|
return (error);
|
|
np->n_brev = np->n_lrev;
|
|
}
|
|
}
|
|
} else
|
|
#endif
|
|
{
|
|
if (np->n_flag & NMODIFIED) {
|
|
if ((error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred,
|
|
ap->a_p, 1)) == EINTR)
|
|
return (error);
|
|
np->n_attrstamp = 0;
|
|
if (vp->v_type == VDIR) {
|
|
nfs_invaldircache(vp, 0);
|
|
np->n_direofoffset = 0;
|
|
}
|
|
error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p);
|
|
if (error)
|
|
return (error);
|
|
np->n_mtime = vattr.va_mtime.tv_sec;
|
|
} else {
|
|
error = VOP_GETATTR(vp, &vattr, ap->a_cred, ap->a_p);
|
|
if (error)
|
|
return (error);
|
|
if (np->n_mtime != vattr.va_mtime.tv_sec) {
|
|
if (vp->v_type == VDIR) {
|
|
nfs_invaldircache(vp, 0);
|
|
np->n_direofoffset = 0;
|
|
}
|
|
if ((error = nfs_vinvalbuf(vp, V_SAVE,
|
|
ap->a_cred, ap->a_p, 1)) == EINTR)
|
|
return (error);
|
|
np->n_mtime = vattr.va_mtime.tv_sec;
|
|
}
|
|
}
|
|
}
|
|
if ((nmp->nm_flag & NFSMNT_NQNFS) == 0)
|
|
np->n_attrstamp = 0; /* For Open/Close consistency */
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* nfs close vnode op
|
|
* What an NFS client should do upon close after writing is a debatable issue.
|
|
* Most NFS clients push delayed writes to the server upon close, basically for
|
|
* two reasons:
|
|
* 1 - So that any write errors may be reported back to the client process
|
|
* doing the close system call. By far the two most likely errors are
|
|
* NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure.
|
|
* 2 - To put a worst case upper bound on cache inconsistency between
|
|
* multiple clients for the file.
|
|
* There is also a consistency problem for Version 2 of the protocol w.r.t.
|
|
* not being able to tell if other clients are writing a file concurrently,
|
|
* since there is no way of knowing if the changed modify time in the reply
|
|
* is only due to the write for this client.
|
|
* (NFS Version 3 provides weak cache consistency data in the reply that
|
|
* should be sufficient to detect and handle this case.)
|
|
*
|
|
* The current code does the following:
|
|
* for NFS Version 2 - play it safe and flush/invalidate all dirty buffers
|
|
* for NFS Version 3 - flush dirty buffers to the server but don't invalidate
|
|
* or commit them (this satisfies 1 and 2 except for the
|
|
* case where the server crashes after this close but
|
|
* before the commit RPC, which is felt to be "good
|
|
* enough". Changing the last argument to nfs_flush() to
|
|
* a 1 would force a commit operation, if it is felt a
|
|
* commit is necessary now.
|
|
* for NQNFS - do nothing now, since 2 is dealt with via leases and
|
|
* 1 should be dealt with via an fsync() system call for
|
|
* cases where write errors are important.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
nfs_close(v)
|
|
void *v;
|
|
{
|
|
struct vop_close_args /* {
|
|
struct vnodeop_desc *a_desc;
|
|
struct vnode *a_vp;
|
|
int a_fflag;
|
|
struct ucred *a_cred;
|
|
struct proc *a_p;
|
|
} */ *ap = v;
|
|
struct vnode *vp = ap->a_vp;
|
|
struct nfsnode *np = VTONFS(vp);
|
|
int error = 0;
|
|
UVMHIST_FUNC("nfs_close"); UVMHIST_CALLED(ubchist);
|
|
|
|
if (vp->v_type == VREG) {
|
|
if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NQNFS) == 0 &&
|
|
(np->n_flag & NMODIFIED)) {
|
|
if (NFS_ISV3(vp)) {
|
|
error = nfs_flush(vp, ap->a_cred, MNT_WAIT, ap->a_p, 0);
|
|
np->n_flag &= ~NMODIFIED;
|
|
} else
|
|
error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred, ap->a_p, 1);
|
|
np->n_attrstamp = 0;
|
|
}
|
|
if (np->n_flag & NWRITEERR) {
|
|
np->n_flag &= ~NWRITEERR;
|
|
error = np->n_error;
|
|
}
|
|
}
|
|
UVMHIST_LOG(ubchist, "returning %d", error,0,0,0);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* nfs getattr call from vfs.
|
|
*/
|
|
int
|
|
nfs_getattr(v)
|
|
void *v;
|
|
{
|
|
struct vop_getattr_args /* {
|
|
struct vnode *a_vp;
|
|
struct vattr *a_vap;
|
|
struct ucred *a_cred;
|
|
struct proc *a_p;
|
|
} */ *ap = v;
|
|
struct vnode *vp = ap->a_vp;
|
|
struct nfsnode *np = VTONFS(vp);
|
|
caddr_t cp;
|
|
u_int32_t *tl;
|
|
int32_t t1, t2;
|
|
caddr_t bpos, dpos;
|
|
int error = 0;
|
|
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
|
|
const int v3 = NFS_ISV3(vp);
|
|
|
|
/*
|
|
* Update local times for special files.
|
|
*/
|
|
if (np->n_flag & (NACC | NUPD))
|
|
np->n_flag |= NCHG;
|
|
/*
|
|
* First look in the cache.
|
|
*/
|
|
if (nfs_getattrcache(vp, ap->a_vap) == 0)
|
|
return (0);
|
|
nfsstats.rpccnt[NFSPROC_GETATTR]++;
|
|
nfsm_reqhead(vp, NFSPROC_GETATTR, NFSX_FH(v3));
|
|
nfsm_fhtom(vp, v3);
|
|
nfsm_request(vp, NFSPROC_GETATTR, ap->a_p, ap->a_cred);
|
|
if (!error) {
|
|
nfsm_loadattr(vp, ap->a_vap);
|
|
if (vp->v_type == VDIR &&
|
|
ap->a_vap->va_blocksize < NFS_DIRFRAGSIZ)
|
|
ap->a_vap->va_blocksize = NFS_DIRFRAGSIZ;
|
|
}
|
|
nfsm_reqdone;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* nfs setattr call.
|
|
*/
|
|
int
|
|
nfs_setattr(v)
|
|
void *v;
|
|
{
|
|
struct vop_setattr_args /* {
|
|
struct vnodeop_desc *a_desc;
|
|
struct vnode *a_vp;
|
|
struct vattr *a_vap;
|
|
struct ucred *a_cred;
|
|
struct proc *a_p;
|
|
} */ *ap = v;
|
|
struct vnode *vp = ap->a_vp;
|
|
struct nfsnode *np = VTONFS(vp);
|
|
struct vattr *vap = ap->a_vap;
|
|
int error = 0;
|
|
u_quad_t tsize = 0;
|
|
|
|
/*
|
|
* Setting of flags is not supported.
|
|
*/
|
|
if (vap->va_flags != VNOVAL)
|
|
return (EOPNOTSUPP);
|
|
|
|
/*
|
|
* Disallow write attempts if the filesystem is mounted read-only.
|
|
*/
|
|
if ((vap->va_uid != (uid_t)VNOVAL ||
|
|
vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL ||
|
|
vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) &&
|
|
(vp->v_mount->mnt_flag & MNT_RDONLY))
|
|
return (EROFS);
|
|
if (vap->va_size != VNOVAL) {
|
|
switch (vp->v_type) {
|
|
case VDIR:
|
|
return (EISDIR);
|
|
case VCHR:
|
|
case VBLK:
|
|
case VSOCK:
|
|
case VFIFO:
|
|
if (vap->va_mtime.tv_sec == VNOVAL &&
|
|
vap->va_atime.tv_sec == VNOVAL &&
|
|
vap->va_mode == (mode_t)VNOVAL &&
|
|
vap->va_uid == (uid_t)VNOVAL &&
|
|
vap->va_gid == (gid_t)VNOVAL)
|
|
return (0);
|
|
vap->va_size = VNOVAL;
|
|
break;
|
|
default:
|
|
/*
|
|
* Disallow write attempts if the filesystem is
|
|
* mounted read-only.
|
|
*/
|
|
if (vp->v_mount->mnt_flag & MNT_RDONLY)
|
|
return (EROFS);
|
|
uvm_vnp_setsize(vp, vap->va_size);
|
|
if (vap->va_size == 0)
|
|
error = nfs_vinvalbuf(vp, 0,
|
|
ap->a_cred, ap->a_p, 1);
|
|
else
|
|
error = nfs_vinvalbuf(vp, V_SAVE,
|
|
ap->a_cred, ap->a_p, 1);
|
|
if (error) {
|
|
uvm_vnp_setsize(vp, np->n_size);
|
|
return (error);
|
|
}
|
|
tsize = np->n_size;
|
|
np->n_size = np->n_vattr->va_size = vap->va_size;
|
|
}
|
|
} else if ((vap->va_mtime.tv_sec != VNOVAL ||
|
|
vap->va_atime.tv_sec != VNOVAL) &&
|
|
vp->v_type == VREG &&
|
|
(error = nfs_vinvalbuf(vp, V_SAVE, ap->a_cred,
|
|
ap->a_p, 1)) == EINTR)
|
|
return (error);
|
|
error = nfs_setattrrpc(vp, vap, ap->a_cred, ap->a_p);
|
|
if (error && vap->va_size != VNOVAL) {
|
|
np->n_size = np->n_vattr->va_size = tsize;
|
|
uvm_vnp_setsize(vp, np->n_size);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Do an nfs setattr rpc.
|
|
*/
|
|
int
|
|
nfs_setattrrpc(vp, vap, cred, procp)
|
|
struct vnode *vp;
|
|
struct vattr *vap;
|
|
struct ucred *cred;
|
|
struct proc *procp;
|
|
{
|
|
struct nfsv2_sattr *sp;
|
|
caddr_t cp;
|
|
int32_t t1, t2;
|
|
caddr_t bpos, dpos, cp2;
|
|
u_int32_t *tl;
|
|
int error = 0, wccflag = NFSV3_WCCRATTR;
|
|
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
|
|
const int v3 = NFS_ISV3(vp);
|
|
|
|
nfsstats.rpccnt[NFSPROC_SETATTR]++;
|
|
nfsm_reqhead(vp, NFSPROC_SETATTR, NFSX_FH(v3) + NFSX_SATTR(v3));
|
|
nfsm_fhtom(vp, v3);
|
|
if (v3) {
|
|
nfsm_v3attrbuild(vap, TRUE);
|
|
nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
|
|
*tl = nfs_false;
|
|
} else {
|
|
nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
|
|
if (vap->va_mode == (mode_t)VNOVAL)
|
|
sp->sa_mode = nfs_xdrneg1;
|
|
else
|
|
sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode);
|
|
if (vap->va_uid == (uid_t)VNOVAL)
|
|
sp->sa_uid = nfs_xdrneg1;
|
|
else
|
|
sp->sa_uid = txdr_unsigned(vap->va_uid);
|
|
if (vap->va_gid == (gid_t)VNOVAL)
|
|
sp->sa_gid = nfs_xdrneg1;
|
|
else
|
|
sp->sa_gid = txdr_unsigned(vap->va_gid);
|
|
sp->sa_size = txdr_unsigned(vap->va_size);
|
|
txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
|
|
txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
|
|
}
|
|
nfsm_request(vp, NFSPROC_SETATTR, procp, cred);
|
|
if (v3) {
|
|
nfsm_wcc_data(vp, wccflag);
|
|
} else
|
|
nfsm_loadattr(vp, (struct vattr *)0);
|
|
nfsm_reqdone;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* nfs lookup call, one step at a time...
|
|
* First look in cache
|
|
* If not found, unlock the directory nfsnode and do the rpc
|
|
*
|
|
* This code is full of lock/unlock statements and checks, because
|
|
* we continue after cache_lookup has finished (we need to check
|
|
* with the attr cache and do an rpc if it has timed out). This means
|
|
* that the locking effects of cache_lookup have to be taken into
|
|
* account.
|
|
*/
|
|
int
|
|
nfs_lookup(v)
|
|
void *v;
|
|
{
|
|
struct vop_lookup_args /* {
|
|
struct vnodeop_desc *a_desc;
|
|
struct vnode *a_dvp;
|
|
struct vnode **a_vpp;
|
|
struct componentname *a_cnp;
|
|
} */ *ap = v;
|
|
struct componentname *cnp = ap->a_cnp;
|
|
struct vnode *dvp = ap->a_dvp;
|
|
struct vnode **vpp = ap->a_vpp;
|
|
int flags;
|
|
struct vnode *newvp;
|
|
u_int32_t *tl;
|
|
caddr_t cp;
|
|
int32_t t1, t2;
|
|
struct nfsmount *nmp;
|
|
caddr_t bpos, dpos, cp2;
|
|
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
|
|
long len;
|
|
nfsfh_t *fhp;
|
|
struct nfsnode *np;
|
|
int lockparent, wantparent, error = 0, attrflag, fhsize;
|
|
const int v3 = NFS_ISV3(dvp);
|
|
|
|
cnp->cn_flags &= ~PDIRUNLOCK;
|
|
flags = cnp->cn_flags;
|
|
|
|
*vpp = NULLVP;
|
|
newvp = NULLVP;
|
|
if ((flags & ISLASTCN) && (dvp->v_mount->mnt_flag & MNT_RDONLY) &&
|
|
(cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME))
|
|
return (EROFS);
|
|
if (dvp->v_type != VDIR)
|
|
return (ENOTDIR);
|
|
|
|
lockparent = flags & LOCKPARENT;
|
|
wantparent = flags & (LOCKPARENT|WANTPARENT);
|
|
nmp = VFSTONFS(dvp->v_mount);
|
|
np = VTONFS(dvp);
|
|
|
|
/*
|
|
* Before tediously performing a linear scan of the directory,
|
|
* check the name cache to see if the directory/name pair
|
|
* we are looking for is known already.
|
|
* If the directory/name pair is found in the name cache,
|
|
* we have to ensure the directory has not changed from
|
|
* the time the cache entry has been created. If it has,
|
|
* the cache entry has to be ignored
|
|
*/
|
|
if ((error = cache_lookup(dvp, vpp, cnp)) >= 0) {
|
|
struct vattr vattr;
|
|
int err2;
|
|
|
|
if (error && error != ENOENT) {
|
|
*vpp = NULLVP;
|
|
return error;
|
|
}
|
|
|
|
if (cnp->cn_flags & PDIRUNLOCK) {
|
|
err2 = vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY);
|
|
if (err2 != 0) {
|
|
*vpp = NULLVP;
|
|
return err2;
|
|
}
|
|
cnp->cn_flags &= ~PDIRUNLOCK;
|
|
}
|
|
|
|
err2 = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, cnp->cn_proc);
|
|
if (err2 != 0) {
|
|
if (error == 0) {
|
|
if (*vpp != dvp)
|
|
vput(*vpp);
|
|
else
|
|
vrele(*vpp);
|
|
}
|
|
*vpp = NULLVP;
|
|
return err2;
|
|
}
|
|
|
|
if (error == ENOENT) {
|
|
if (!VOP_GETATTR(dvp, &vattr, cnp->cn_cred,
|
|
cnp->cn_proc) && vattr.va_mtime.tv_sec ==
|
|
VTONFS(dvp)->n_nctime)
|
|
return ENOENT;
|
|
cache_purge(dvp);
|
|
np->n_nctime = 0;
|
|
goto dorpc;
|
|
}
|
|
|
|
newvp = *vpp;
|
|
if (!VOP_GETATTR(newvp, &vattr, cnp->cn_cred, cnp->cn_proc)
|
|
&& vattr.va_ctime.tv_sec == VTONFS(newvp)->n_ctime)
|
|
{
|
|
nfsstats.lookupcache_hits++;
|
|
if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN))
|
|
cnp->cn_flags |= SAVENAME;
|
|
if ((!lockparent || !(flags & ISLASTCN)) &&
|
|
newvp != dvp)
|
|
VOP_UNLOCK(dvp, 0);
|
|
return (0);
|
|
}
|
|
cache_purge(newvp);
|
|
if (newvp != dvp)
|
|
vput(newvp);
|
|
else
|
|
vrele(newvp);
|
|
*vpp = NULLVP;
|
|
}
|
|
dorpc:
|
|
error = 0;
|
|
newvp = NULLVP;
|
|
nfsstats.lookupcache_misses++;
|
|
nfsstats.rpccnt[NFSPROC_LOOKUP]++;
|
|
len = cnp->cn_namelen;
|
|
nfsm_reqhead(dvp, NFSPROC_LOOKUP,
|
|
NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len));
|
|
nfsm_fhtom(dvp, v3);
|
|
nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN);
|
|
nfsm_request(dvp, NFSPROC_LOOKUP, cnp->cn_proc, cnp->cn_cred);
|
|
if (error) {
|
|
nfsm_postop_attr(dvp, attrflag);
|
|
m_freem(mrep);
|
|
goto nfsmout;
|
|
}
|
|
nfsm_getfh(fhp, fhsize, v3);
|
|
|
|
/*
|
|
* Handle RENAME case...
|
|
*/
|
|
if (cnp->cn_nameiop == RENAME && wantparent && (flags & ISLASTCN)) {
|
|
if (NFS_CMPFH(np, fhp, fhsize)) {
|
|
m_freem(mrep);
|
|
return (EISDIR);
|
|
}
|
|
error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
|
|
if (error) {
|
|
m_freem(mrep);
|
|
return error;
|
|
}
|
|
newvp = NFSTOV(np);
|
|
if (v3) {
|
|
nfsm_postop_attr(newvp, attrflag);
|
|
nfsm_postop_attr(dvp, attrflag);
|
|
} else
|
|
nfsm_loadattr(newvp, (struct vattr *)0);
|
|
*vpp = newvp;
|
|
m_freem(mrep);
|
|
cnp->cn_flags |= SAVENAME;
|
|
if (!lockparent) {
|
|
VOP_UNLOCK(dvp, 0);
|
|
cnp->cn_flags |= PDIRUNLOCK;
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* The postop attr handling is duplicated for each if case,
|
|
* because it should be done while dvp is locked (unlocking
|
|
* dvp is different for each case).
|
|
*/
|
|
|
|
if (NFS_CMPFH(np, fhp, fhsize)) {
|
|
/*
|
|
* "." lookup
|
|
*/
|
|
VREF(dvp);
|
|
newvp = dvp;
|
|
if (v3) {
|
|
nfsm_postop_attr(newvp, attrflag);
|
|
nfsm_postop_attr(dvp, attrflag);
|
|
} else
|
|
nfsm_loadattr(newvp, (struct vattr *)0);
|
|
} else if (flags & ISDOTDOT) {
|
|
/*
|
|
* ".." lookup
|
|
*/
|
|
VOP_UNLOCK(dvp, 0);
|
|
cnp->cn_flags |= PDIRUNLOCK;
|
|
|
|
error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
|
|
if (error) {
|
|
if (vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY) == 0)
|
|
cnp->cn_flags &= ~PDIRUNLOCK;
|
|
m_freem(mrep);
|
|
return error;
|
|
}
|
|
newvp = NFSTOV(np);
|
|
|
|
if (v3) {
|
|
nfsm_postop_attr(newvp, attrflag);
|
|
nfsm_postop_attr(dvp, attrflag);
|
|
} else
|
|
nfsm_loadattr(newvp, (struct vattr *)0);
|
|
|
|
if (lockparent && (flags & ISLASTCN)) {
|
|
if ((error = vn_lock(dvp, LK_EXCLUSIVE))) {
|
|
m_freem(mrep);
|
|
vput(newvp);
|
|
return error;
|
|
}
|
|
cnp->cn_flags &= ~PDIRUNLOCK;
|
|
}
|
|
} else {
|
|
/*
|
|
* Other lookups.
|
|
*/
|
|
error = nfs_nget(dvp->v_mount, fhp, fhsize, &np);
|
|
if (error) {
|
|
m_freem(mrep);
|
|
return error;
|
|
}
|
|
newvp = NFSTOV(np);
|
|
if (v3) {
|
|
nfsm_postop_attr(newvp, attrflag);
|
|
nfsm_postop_attr(dvp, attrflag);
|
|
} else
|
|
nfsm_loadattr(newvp, (struct vattr *)0);
|
|
if (!lockparent || !(flags & ISLASTCN)) {
|
|
VOP_UNLOCK(dvp, 0);
|
|
cnp->cn_flags |= PDIRUNLOCK;
|
|
}
|
|
}
|
|
if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN))
|
|
cnp->cn_flags |= SAVENAME;
|
|
if ((cnp->cn_flags & MAKEENTRY) &&
|
|
(cnp->cn_nameiop != DELETE || !(flags & ISLASTCN))) {
|
|
np->n_ctime = np->n_vattr->va_ctime.tv_sec;
|
|
cache_enter(dvp, newvp, cnp);
|
|
}
|
|
*vpp = newvp;
|
|
nfsm_reqdone;
|
|
if (error) {
|
|
/*
|
|
* We get here only because of errors returned by
|
|
* the RPC. Otherwise we'll have returned above
|
|
* (the nfsm_* macros will jump to nfsm_reqdone
|
|
* on error).
|
|
*/
|
|
if (error == ENOENT && (cnp->cn_flags & MAKEENTRY) &&
|
|
cnp->cn_nameiop != CREATE) {
|
|
if (VTONFS(dvp)->n_nctime == 0)
|
|
VTONFS(dvp)->n_nctime =
|
|
VTONFS(dvp)->n_vattr->va_mtime.tv_sec;
|
|
cache_enter(dvp, NULL, cnp);
|
|
}
|
|
if (newvp != NULLVP) {
|
|
vrele(newvp);
|
|
if (newvp != dvp)
|
|
VOP_UNLOCK(newvp, 0);
|
|
}
|
|
if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) &&
|
|
(flags & ISLASTCN) && error == ENOENT) {
|
|
if (dvp->v_mount->mnt_flag & MNT_RDONLY)
|
|
error = EROFS;
|
|
else
|
|
error = EJUSTRETURN;
|
|
}
|
|
if (cnp->cn_nameiop != LOOKUP && (flags & ISLASTCN))
|
|
cnp->cn_flags |= SAVENAME;
|
|
*vpp = NULL;
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* nfs read call.
|
|
* Just call nfs_bioread() to do the work.
|
|
*/
|
|
int
|
|
nfs_read(v)
|
|
void *v;
|
|
{
|
|
struct vop_read_args /* {
|
|
struct vnode *a_vp;
|
|
struct uio *a_uio;
|
|
int a_ioflag;
|
|
struct ucred *a_cred;
|
|
} */ *ap = v;
|
|
struct vnode *vp = ap->a_vp;
|
|
|
|
if (vp->v_type != VREG)
|
|
return (EPERM);
|
|
return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred, 0));
|
|
}
|
|
|
|
/*
|
|
* nfs readlink call
|
|
*/
|
|
int
|
|
nfs_readlink(v)
|
|
void *v;
|
|
{
|
|
struct vop_readlink_args /* {
|
|
struct vnode *a_vp;
|
|
struct uio *a_uio;
|
|
struct ucred *a_cred;
|
|
} */ *ap = v;
|
|
struct vnode *vp = ap->a_vp;
|
|
|
|
if (vp->v_type != VLNK)
|
|
return (EPERM);
|
|
return (nfs_bioread(vp, ap->a_uio, 0, ap->a_cred, 0));
|
|
}
|
|
|
|
/*
|
|
* Do a readlink rpc.
|
|
* Called by nfs_doio() from below the buffer cache.
|
|
*/
|
|
int
|
|
nfs_readlinkrpc(vp, uiop, cred)
|
|
struct vnode *vp;
|
|
struct uio *uiop;
|
|
struct ucred *cred;
|
|
{
|
|
u_int32_t *tl;
|
|
caddr_t cp;
|
|
int32_t t1, t2;
|
|
caddr_t bpos, dpos, cp2;
|
|
int error = 0, len, attrflag;
|
|
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
|
|
const int v3 = NFS_ISV3(vp);
|
|
|
|
nfsstats.rpccnt[NFSPROC_READLINK]++;
|
|
nfsm_reqhead(vp, NFSPROC_READLINK, NFSX_FH(v3));
|
|
nfsm_fhtom(vp, v3);
|
|
nfsm_request(vp, NFSPROC_READLINK, uiop->uio_procp, cred);
|
|
if (v3)
|
|
nfsm_postop_attr(vp, attrflag);
|
|
if (!error) {
|
|
nfsm_strsiz(len, NFS_MAXPATHLEN);
|
|
nfsm_mtouio(uiop, len);
|
|
}
|
|
nfsm_reqdone;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* nfs read rpc call
|
|
* Ditto above
|
|
*/
|
|
int
|
|
nfs_readrpc(vp, uiop)
|
|
struct vnode *vp;
|
|
struct uio *uiop;
|
|
{
|
|
u_int32_t *tl;
|
|
caddr_t cp;
|
|
int32_t t1, t2;
|
|
caddr_t bpos, dpos, cp2;
|
|
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
|
|
struct nfsmount *nmp;
|
|
int error = 0, len, retlen, tsiz, eof, attrflag;
|
|
const int v3 = NFS_ISV3(vp);
|
|
|
|
#ifndef nolint
|
|
eof = 0;
|
|
#endif
|
|
nmp = VFSTONFS(vp->v_mount);
|
|
tsiz = uiop->uio_resid;
|
|
if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize)
|
|
return (EFBIG);
|
|
while (tsiz > 0) {
|
|
nfsstats.rpccnt[NFSPROC_READ]++;
|
|
len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz;
|
|
nfsm_reqhead(vp, NFSPROC_READ, NFSX_FH(v3) + NFSX_UNSIGNED * 3);
|
|
nfsm_fhtom(vp, v3);
|
|
nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED * 3);
|
|
if (v3) {
|
|
txdr_hyper(uiop->uio_offset, tl);
|
|
*(tl + 2) = txdr_unsigned(len);
|
|
} else {
|
|
*tl++ = txdr_unsigned(uiop->uio_offset);
|
|
*tl++ = txdr_unsigned(len);
|
|
*tl = 0;
|
|
}
|
|
nfsm_request(vp, NFSPROC_READ, uiop->uio_procp,
|
|
VTONFS(vp)->n_rcred);
|
|
if (v3) {
|
|
nfsm_postop_attr(vp, attrflag);
|
|
if (error) {
|
|
m_freem(mrep);
|
|
goto nfsmout;
|
|
}
|
|
nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
|
|
eof = fxdr_unsigned(int, *(tl + 1));
|
|
} else
|
|
nfsm_loadattr(vp, (struct vattr *)0);
|
|
nfsm_strsiz(retlen, nmp->nm_rsize);
|
|
nfsm_mtouio(uiop, retlen);
|
|
m_freem(mrep);
|
|
tsiz -= retlen;
|
|
if (v3) {
|
|
if (eof || retlen == 0)
|
|
tsiz = 0;
|
|
} else if (retlen < len)
|
|
tsiz = 0;
|
|
}
|
|
nfsmout:
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* nfs write call
|
|
*/
|
|
int
|
|
nfs_writerpc(vp, uiop, iomode, must_commit)
|
|
struct vnode *vp;
|
|
struct uio *uiop;
|
|
int *iomode, *must_commit;
|
|
{
|
|
u_int32_t *tl;
|
|
caddr_t cp;
|
|
int32_t t1, t2, backup;
|
|
caddr_t bpos, dpos, cp2;
|
|
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
|
|
struct nfsmount *nmp = VFSTONFS(vp->v_mount);
|
|
int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit;
|
|
const int v3 = NFS_ISV3(vp);
|
|
int committed = NFSV3WRITE_FILESYNC;
|
|
|
|
if (vp->v_mount->mnt_flag & MNT_RDONLY) {
|
|
panic("writerpc readonly vp %p", vp);
|
|
}
|
|
|
|
#ifndef DIAGNOSTIC
|
|
if (uiop->uio_iovcnt != 1)
|
|
panic("nfs: writerpc iovcnt > 1");
|
|
#endif
|
|
*must_commit = 0;
|
|
tsiz = uiop->uio_resid;
|
|
if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize)
|
|
return (EFBIG);
|
|
while (tsiz > 0) {
|
|
nfsstats.rpccnt[NFSPROC_WRITE]++;
|
|
len = min(tsiz, nmp->nm_wsize);
|
|
nfsm_reqhead(vp, NFSPROC_WRITE,
|
|
NFSX_FH(v3) + 5 * NFSX_UNSIGNED + nfsm_rndup(len));
|
|
nfsm_fhtom(vp, v3);
|
|
if (v3) {
|
|
nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
|
|
txdr_hyper(uiop->uio_offset, tl);
|
|
tl += 2;
|
|
*tl++ = txdr_unsigned(len);
|
|
*tl++ = txdr_unsigned(*iomode);
|
|
*tl = txdr_unsigned(len);
|
|
} else {
|
|
u_int32_t x;
|
|
|
|
nfsm_build(tl, u_int32_t *, 4 * NFSX_UNSIGNED);
|
|
/* Set both "begin" and "current" to non-garbage. */
|
|
x = txdr_unsigned((u_int32_t)uiop->uio_offset);
|
|
*tl++ = x; /* "begin offset" */
|
|
*tl++ = x; /* "current offset" */
|
|
x = txdr_unsigned(len);
|
|
*tl++ = x; /* total to this offset */
|
|
*tl = x; /* size of this write */
|
|
|
|
}
|
|
nfsm_uiotom(uiop, len);
|
|
nfsm_request(vp, NFSPROC_WRITE, uiop->uio_procp,
|
|
VTONFS(vp)->n_wcred);
|
|
if (v3) {
|
|
wccflag = NFSV3_WCCCHK;
|
|
nfsm_wcc_data(vp, wccflag);
|
|
if (!error) {
|
|
nfsm_dissect(tl, u_int32_t *, 2 * NFSX_UNSIGNED
|
|
+ NFSX_V3WRITEVERF);
|
|
rlen = fxdr_unsigned(int, *tl++);
|
|
if (rlen == 0) {
|
|
error = NFSERR_IO;
|
|
m_freem(mrep);
|
|
break;
|
|
} else if (rlen < len) {
|
|
backup = len - rlen;
|
|
uiop->uio_iov->iov_base =
|
|
(caddr_t)uiop->uio_iov->iov_base -
|
|
backup;
|
|
uiop->uio_iov->iov_len += backup;
|
|
uiop->uio_offset -= backup;
|
|
uiop->uio_resid += backup;
|
|
len = rlen;
|
|
}
|
|
commit = fxdr_unsigned(int, *tl++);
|
|
|
|
/*
|
|
* Return the lowest committment level
|
|
* obtained by any of the RPCs.
|
|
*/
|
|
if (committed == NFSV3WRITE_FILESYNC)
|
|
committed = commit;
|
|
else if (committed == NFSV3WRITE_DATASYNC &&
|
|
commit == NFSV3WRITE_UNSTABLE)
|
|
committed = commit;
|
|
if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0){
|
|
memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl,
|
|
NFSX_V3WRITEVERF);
|
|
nmp->nm_iflag |= NFSMNT_HASWRITEVERF;
|
|
} else if (memcmp((caddr_t)tl,
|
|
(caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) {
|
|
*must_commit = 1;
|
|
memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl,
|
|
NFSX_V3WRITEVERF);
|
|
}
|
|
}
|
|
} else
|
|
nfsm_loadattr(vp, (struct vattr *)0);
|
|
if (wccflag)
|
|
VTONFS(vp)->n_mtime = VTONFS(vp)->n_vattr->va_mtime.tv_sec;
|
|
m_freem(mrep);
|
|
if (error)
|
|
break;
|
|
tsiz -= len;
|
|
}
|
|
nfsmout:
|
|
*iomode = committed;
|
|
if (error)
|
|
uiop->uio_resid = tsiz;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* nfs mknod rpc
|
|
* For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the
|
|
* mode set to specify the file type and the size field for rdev.
|
|
*/
|
|
int
|
|
nfs_mknodrpc(dvp, vpp, cnp, vap)
|
|
struct vnode *dvp;
|
|
struct vnode **vpp;
|
|
struct componentname *cnp;
|
|
struct vattr *vap;
|
|
{
|
|
struct nfsv2_sattr *sp;
|
|
u_int32_t *tl;
|
|
caddr_t cp;
|
|
int32_t t1, t2;
|
|
struct vnode *newvp = (struct vnode *)0;
|
|
struct nfsnode *np;
|
|
char *cp2;
|
|
caddr_t bpos, dpos;
|
|
int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0;
|
|
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
|
|
u_int32_t rdev;
|
|
const int v3 = NFS_ISV3(dvp);
|
|
|
|
if (vap->va_type == VCHR || vap->va_type == VBLK)
|
|
rdev = txdr_unsigned(vap->va_rdev);
|
|
else if (vap->va_type == VFIFO || vap->va_type == VSOCK)
|
|
rdev = nfs_xdrneg1;
|
|
else {
|
|
VOP_ABORTOP(dvp, cnp);
|
|
vput(dvp);
|
|
return (EOPNOTSUPP);
|
|
}
|
|
nfsstats.rpccnt[NFSPROC_MKNOD]++;
|
|
nfsm_reqhead(dvp, NFSPROC_MKNOD, NFSX_FH(v3) + 4 * NFSX_UNSIGNED +
|
|
+ nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3));
|
|
nfsm_fhtom(dvp, v3);
|
|
nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
|
|
if (v3) {
|
|
nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
|
|
*tl++ = vtonfsv3_type(vap->va_type);
|
|
nfsm_v3attrbuild(vap, FALSE);
|
|
if (vap->va_type == VCHR || vap->va_type == VBLK) {
|
|
nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
|
|
*tl++ = txdr_unsigned(major(vap->va_rdev));
|
|
*tl = txdr_unsigned(minor(vap->va_rdev));
|
|
}
|
|
} else {
|
|
nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
|
|
sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode);
|
|
sp->sa_uid = nfs_xdrneg1;
|
|
sp->sa_gid = nfs_xdrneg1;
|
|
sp->sa_size = rdev;
|
|
txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
|
|
txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
|
|
}
|
|
nfsm_request(dvp, NFSPROC_MKNOD, cnp->cn_proc, cnp->cn_cred);
|
|
if (!error) {
|
|
nfsm_mtofh(dvp, newvp, v3, gotvp);
|
|
if (!gotvp) {
|
|
error = nfs_lookitup(dvp, cnp->cn_nameptr,
|
|
cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np);
|
|
if (!error)
|
|
newvp = NFSTOV(np);
|
|
}
|
|
}
|
|
if (v3)
|
|
nfsm_wcc_data(dvp, wccflag);
|
|
nfsm_reqdone;
|
|
if (error) {
|
|
if (newvp)
|
|
vput(newvp);
|
|
} else {
|
|
if (cnp->cn_flags & MAKEENTRY)
|
|
cache_enter(dvp, newvp, cnp);
|
|
*vpp = newvp;
|
|
}
|
|
PNBUF_PUT(cnp->cn_pnbuf);
|
|
VTONFS(dvp)->n_flag |= NMODIFIED;
|
|
if (!wccflag)
|
|
VTONFS(dvp)->n_attrstamp = 0;
|
|
vput(dvp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* nfs mknod vop
|
|
* just call nfs_mknodrpc() to do the work.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
nfs_mknod(v)
|
|
void *v;
|
|
{
|
|
struct vop_mknod_args /* {
|
|
struct vnode *a_dvp;
|
|
struct vnode **a_vpp;
|
|
struct componentname *a_cnp;
|
|
struct vattr *a_vap;
|
|
} */ *ap = v;
|
|
int error;
|
|
|
|
error = nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap);
|
|
return (error);
|
|
}
|
|
|
|
static u_long create_verf;
|
|
/*
|
|
* nfs file create call
|
|
*/
|
|
int
|
|
nfs_create(v)
|
|
void *v;
|
|
{
|
|
struct vop_create_args /* {
|
|
struct vnode *a_dvp;
|
|
struct vnode **a_vpp;
|
|
struct componentname *a_cnp;
|
|
struct vattr *a_vap;
|
|
} */ *ap = v;
|
|
struct vnode *dvp = ap->a_dvp;
|
|
struct vattr *vap = ap->a_vap;
|
|
struct componentname *cnp = ap->a_cnp;
|
|
struct nfsv2_sattr *sp;
|
|
u_int32_t *tl;
|
|
caddr_t cp;
|
|
int32_t t1, t2;
|
|
struct nfsnode *np = (struct nfsnode *)0;
|
|
struct vnode *newvp = (struct vnode *)0;
|
|
caddr_t bpos, dpos, cp2;
|
|
int error, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0;
|
|
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
|
|
const int v3 = NFS_ISV3(dvp);
|
|
|
|
/*
|
|
* Oops, not for me..
|
|
*/
|
|
if (vap->va_type == VSOCK)
|
|
return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap));
|
|
|
|
#ifdef VA_EXCLUSIVE
|
|
if (vap->va_vaflags & VA_EXCLUSIVE)
|
|
fmode |= O_EXCL;
|
|
#endif
|
|
again:
|
|
error = 0;
|
|
nfsstats.rpccnt[NFSPROC_CREATE]++;
|
|
nfsm_reqhead(dvp, NFSPROC_CREATE, NFSX_FH(v3) + 2 * NFSX_UNSIGNED +
|
|
nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(v3));
|
|
nfsm_fhtom(dvp, v3);
|
|
nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
|
|
if (v3) {
|
|
nfsm_build(tl, u_int32_t *, NFSX_UNSIGNED);
|
|
if (fmode & O_EXCL) {
|
|
*tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE);
|
|
nfsm_build(tl, u_int32_t *, NFSX_V3CREATEVERF);
|
|
#ifdef INET
|
|
if (in_ifaddr.tqh_first)
|
|
*tl++ = in_ifaddr.tqh_first->ia_addr.sin_addr.s_addr;
|
|
else
|
|
*tl++ = create_verf;
|
|
#else
|
|
*tl++ = create_verf;
|
|
#endif
|
|
*tl = ++create_verf;
|
|
} else {
|
|
*tl = txdr_unsigned(NFSV3CREATE_UNCHECKED);
|
|
nfsm_v3attrbuild(vap, FALSE);
|
|
}
|
|
} else {
|
|
nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
|
|
sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode);
|
|
sp->sa_uid = nfs_xdrneg1;
|
|
sp->sa_gid = nfs_xdrneg1;
|
|
sp->sa_size = 0;
|
|
txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
|
|
txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
|
|
}
|
|
nfsm_request(dvp, NFSPROC_CREATE, cnp->cn_proc, cnp->cn_cred);
|
|
if (!error) {
|
|
nfsm_mtofh(dvp, newvp, v3, gotvp);
|
|
if (!gotvp) {
|
|
error = nfs_lookitup(dvp, cnp->cn_nameptr,
|
|
cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc, &np);
|
|
if (!error)
|
|
newvp = NFSTOV(np);
|
|
}
|
|
}
|
|
if (v3)
|
|
nfsm_wcc_data(dvp, wccflag);
|
|
nfsm_reqdone;
|
|
if (error) {
|
|
if (v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) {
|
|
fmode &= ~O_EXCL;
|
|
goto again;
|
|
}
|
|
if (newvp)
|
|
vput(newvp);
|
|
} else if (v3 && (fmode & O_EXCL))
|
|
error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_proc);
|
|
if (!error) {
|
|
if (cnp->cn_flags & MAKEENTRY)
|
|
cache_enter(dvp, newvp, cnp);
|
|
*ap->a_vpp = newvp;
|
|
}
|
|
PNBUF_PUT(cnp->cn_pnbuf);
|
|
VTONFS(dvp)->n_flag |= NMODIFIED;
|
|
if (!wccflag)
|
|
VTONFS(dvp)->n_attrstamp = 0;
|
|
vput(dvp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* nfs file remove call
|
|
* To try and make nfs semantics closer to ufs semantics, a file that has
|
|
* other processes using the vnode is renamed instead of removed and then
|
|
* removed later on the last close.
|
|
* - If v_usecount > 1
|
|
* If a rename is not already in the works
|
|
* call nfs_sillyrename() to set it up
|
|
* else
|
|
* do the remove rpc
|
|
*/
|
|
int
|
|
nfs_remove(v)
|
|
void *v;
|
|
{
|
|
struct vop_remove_args /* {
|
|
struct vnodeop_desc *a_desc;
|
|
struct vnode * a_dvp;
|
|
struct vnode * a_vp;
|
|
struct componentname * a_cnp;
|
|
} */ *ap = v;
|
|
struct vnode *vp = ap->a_vp;
|
|
struct vnode *dvp = ap->a_dvp;
|
|
struct componentname *cnp = ap->a_cnp;
|
|
struct nfsnode *np = VTONFS(vp);
|
|
int error = 0;
|
|
struct vattr vattr;
|
|
|
|
#ifndef DIAGNOSTIC
|
|
if ((cnp->cn_flags & HASBUF) == 0)
|
|
panic("nfs_remove: no name");
|
|
if (vp->v_usecount < 1)
|
|
panic("nfs_remove: bad v_usecount");
|
|
#endif
|
|
if (vp->v_type == VDIR)
|
|
error = EPERM;
|
|
else if (vp->v_usecount == 1 || (np->n_sillyrename &&
|
|
VOP_GETATTR(vp, &vattr, cnp->cn_cred, cnp->cn_proc) == 0 &&
|
|
vattr.va_nlink > 1)) {
|
|
/*
|
|
* Purge the name cache so that the chance of a lookup for
|
|
* the name succeeding while the remove is in progress is
|
|
* minimized. Without node locking it can still happen, such
|
|
* that an I/O op returns ESTALE, but since you get this if
|
|
* another host removes the file..
|
|
*/
|
|
cache_purge(vp);
|
|
/*
|
|
* throw away biocache buffers, mainly to avoid
|
|
* unnecessary delayed writes later.
|
|
*/
|
|
error = nfs_vinvalbuf(vp, 0, cnp->cn_cred, cnp->cn_proc, 1);
|
|
/* Do the rpc */
|
|
if (error != EINTR)
|
|
error = nfs_removerpc(dvp, cnp->cn_nameptr,
|
|
cnp->cn_namelen, cnp->cn_cred, cnp->cn_proc);
|
|
/*
|
|
* Kludge City: If the first reply to the remove rpc is lost..
|
|
* the reply to the retransmitted request will be ENOENT
|
|
* since the file was in fact removed
|
|
* Therefore, we cheat and return success.
|
|
*/
|
|
if (error == ENOENT)
|
|
error = 0;
|
|
} else if (!np->n_sillyrename)
|
|
error = nfs_sillyrename(dvp, vp, cnp);
|
|
PNBUF_PUT(cnp->cn_pnbuf);
|
|
np->n_attrstamp = 0;
|
|
vput(dvp);
|
|
vput(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* nfs file remove rpc called from nfs_inactive
|
|
*/
|
|
int
|
|
nfs_removeit(sp)
|
|
struct sillyrename *sp;
|
|
{
|
|
|
|
return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, sp->s_cred,
|
|
(struct proc *)0));
|
|
}
|
|
|
|
/*
|
|
* Nfs remove rpc, called from nfs_remove() and nfs_removeit().
|
|
*/
|
|
int
|
|
nfs_removerpc(dvp, name, namelen, cred, proc)
|
|
struct vnode *dvp;
|
|
const char *name;
|
|
int namelen;
|
|
struct ucred *cred;
|
|
struct proc *proc;
|
|
{
|
|
u_int32_t *tl;
|
|
caddr_t cp;
|
|
int32_t t1, t2;
|
|
caddr_t bpos, dpos, cp2;
|
|
int error = 0, wccflag = NFSV3_WCCRATTR;
|
|
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
|
|
const int v3 = NFS_ISV3(dvp);
|
|
|
|
nfsstats.rpccnt[NFSPROC_REMOVE]++;
|
|
nfsm_reqhead(dvp, NFSPROC_REMOVE,
|
|
NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(namelen));
|
|
nfsm_fhtom(dvp, v3);
|
|
nfsm_strtom(name, namelen, NFS_MAXNAMLEN);
|
|
nfsm_request(dvp, NFSPROC_REMOVE, proc, cred);
|
|
if (v3)
|
|
nfsm_wcc_data(dvp, wccflag);
|
|
nfsm_reqdone;
|
|
VTONFS(dvp)->n_flag |= NMODIFIED;
|
|
if (!wccflag)
|
|
VTONFS(dvp)->n_attrstamp = 0;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* nfs file rename call
|
|
*/
|
|
int
|
|
nfs_rename(v)
|
|
void *v;
|
|
{
|
|
struct vop_rename_args /* {
|
|
struct vnode *a_fdvp;
|
|
struct vnode *a_fvp;
|
|
struct componentname *a_fcnp;
|
|
struct vnode *a_tdvp;
|
|
struct vnode *a_tvp;
|
|
struct componentname *a_tcnp;
|
|
} */ *ap = v;
|
|
struct vnode *fvp = ap->a_fvp;
|
|
struct vnode *tvp = ap->a_tvp;
|
|
struct vnode *fdvp = ap->a_fdvp;
|
|
struct vnode *tdvp = ap->a_tdvp;
|
|
struct componentname *tcnp = ap->a_tcnp;
|
|
struct componentname *fcnp = ap->a_fcnp;
|
|
int error;
|
|
|
|
#ifndef DIAGNOSTIC
|
|
if ((tcnp->cn_flags & HASBUF) == 0 ||
|
|
(fcnp->cn_flags & HASBUF) == 0)
|
|
panic("nfs_rename: no name");
|
|
#endif
|
|
/* Check for cross-device rename */
|
|
if ((fvp->v_mount != tdvp->v_mount) ||
|
|
(tvp && (fvp->v_mount != tvp->v_mount))) {
|
|
error = EXDEV;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* If the tvp exists and is in use, sillyrename it before doing the
|
|
* rename of the new file over it.
|
|
*/
|
|
if (tvp && tvp->v_usecount > 1 && !VTONFS(tvp)->n_sillyrename &&
|
|
tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) {
|
|
vput(tvp);
|
|
tvp = NULL;
|
|
}
|
|
|
|
error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen,
|
|
tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred,
|
|
tcnp->cn_proc);
|
|
|
|
if (fvp->v_type == VDIR) {
|
|
if (tvp != NULL && tvp->v_type == VDIR)
|
|
cache_purge(tdvp);
|
|
cache_purge(fdvp);
|
|
}
|
|
out:
|
|
if (tdvp == tvp)
|
|
vrele(tdvp);
|
|
else
|
|
vput(tdvp);
|
|
if (tvp)
|
|
vput(tvp);
|
|
vrele(fdvp);
|
|
vrele(fvp);
|
|
/*
|
|
* Kludge: Map ENOENT => 0 assuming that it is a reply to a retry.
|
|
*/
|
|
if (error == ENOENT)
|
|
error = 0;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* nfs file rename rpc called from nfs_remove() above
|
|
*/
|
|
int
|
|
nfs_renameit(sdvp, scnp, sp)
|
|
struct vnode *sdvp;
|
|
struct componentname *scnp;
|
|
struct sillyrename *sp;
|
|
{
|
|
return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen,
|
|
sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_proc));
|
|
}
|
|
|
|
/*
|
|
* Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit().
|
|
*/
|
|
int
|
|
nfs_renamerpc(fdvp, fnameptr, fnamelen, tdvp, tnameptr, tnamelen, cred, proc)
|
|
struct vnode *fdvp;
|
|
const char *fnameptr;
|
|
int fnamelen;
|
|
struct vnode *tdvp;
|
|
const char *tnameptr;
|
|
int tnamelen;
|
|
struct ucred *cred;
|
|
struct proc *proc;
|
|
{
|
|
u_int32_t *tl;
|
|
caddr_t cp;
|
|
int32_t t1, t2;
|
|
caddr_t bpos, dpos, cp2;
|
|
int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR;
|
|
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
|
|
const int v3 = NFS_ISV3(fdvp);
|
|
|
|
nfsstats.rpccnt[NFSPROC_RENAME]++;
|
|
nfsm_reqhead(fdvp, NFSPROC_RENAME,
|
|
(NFSX_FH(v3) + NFSX_UNSIGNED)*2 + nfsm_rndup(fnamelen) +
|
|
nfsm_rndup(tnamelen));
|
|
nfsm_fhtom(fdvp, v3);
|
|
nfsm_strtom(fnameptr, fnamelen, NFS_MAXNAMLEN);
|
|
nfsm_fhtom(tdvp, v3);
|
|
nfsm_strtom(tnameptr, tnamelen, NFS_MAXNAMLEN);
|
|
nfsm_request(fdvp, NFSPROC_RENAME, proc, cred);
|
|
if (v3) {
|
|
nfsm_wcc_data(fdvp, fwccflag);
|
|
nfsm_wcc_data(tdvp, twccflag);
|
|
}
|
|
nfsm_reqdone;
|
|
VTONFS(fdvp)->n_flag |= NMODIFIED;
|
|
VTONFS(tdvp)->n_flag |= NMODIFIED;
|
|
if (!fwccflag)
|
|
VTONFS(fdvp)->n_attrstamp = 0;
|
|
if (!twccflag)
|
|
VTONFS(tdvp)->n_attrstamp = 0;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* nfs hard link create call
|
|
*/
|
|
int
|
|
nfs_link(v)
|
|
void *v;
|
|
{
|
|
struct vop_link_args /* {
|
|
struct vnode *a_dvp;
|
|
struct vnode *a_vp;
|
|
struct componentname *a_cnp;
|
|
} */ *ap = v;
|
|
struct vnode *vp = ap->a_vp;
|
|
struct vnode *dvp = ap->a_dvp;
|
|
struct componentname *cnp = ap->a_cnp;
|
|
u_int32_t *tl;
|
|
caddr_t cp;
|
|
int32_t t1, t2;
|
|
caddr_t bpos, dpos, cp2;
|
|
int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0;
|
|
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
|
|
/* XXX Should be const and initialised? */
|
|
int v3;
|
|
|
|
if (dvp->v_mount != vp->v_mount) {
|
|
VOP_ABORTOP(vp, cnp);
|
|
vput(dvp);
|
|
return (EXDEV);
|
|
}
|
|
if (dvp != vp) {
|
|
error = vn_lock(vp, LK_EXCLUSIVE);
|
|
if (error != 0) {
|
|
VOP_ABORTOP(dvp, cnp);
|
|
vput(dvp);
|
|
return error;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Push all writes to the server, so that the attribute cache
|
|
* doesn't get "out of sync" with the server.
|
|
* XXX There should be a better way!
|
|
*/
|
|
VOP_FSYNC(vp, cnp->cn_cred, FSYNC_WAIT, 0, 0, cnp->cn_proc);
|
|
|
|
v3 = NFS_ISV3(vp);
|
|
nfsstats.rpccnt[NFSPROC_LINK]++;
|
|
nfsm_reqhead(vp, NFSPROC_LINK,
|
|
NFSX_FH(v3)*2 + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen));
|
|
nfsm_fhtom(vp, v3);
|
|
nfsm_fhtom(dvp, v3);
|
|
nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
|
|
nfsm_request(vp, NFSPROC_LINK, cnp->cn_proc, cnp->cn_cred);
|
|
if (v3) {
|
|
nfsm_postop_attr(vp, attrflag);
|
|
nfsm_wcc_data(dvp, wccflag);
|
|
}
|
|
nfsm_reqdone;
|
|
PNBUF_PUT(cnp->cn_pnbuf);
|
|
VTONFS(dvp)->n_flag |= NMODIFIED;
|
|
if (!attrflag)
|
|
VTONFS(vp)->n_attrstamp = 0;
|
|
if (!wccflag)
|
|
VTONFS(dvp)->n_attrstamp = 0;
|
|
if (dvp != vp)
|
|
VOP_UNLOCK(vp, 0);
|
|
vput(dvp);
|
|
/*
|
|
* Kludge: Map EEXIST => 0 assuming that it is a reply to a retry.
|
|
*/
|
|
if (error == EEXIST)
|
|
error = 0;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* nfs symbolic link create call
|
|
*/
|
|
int
|
|
nfs_symlink(v)
|
|
void *v;
|
|
{
|
|
struct vop_symlink_args /* {
|
|
struct vnode *a_dvp;
|
|
struct vnode **a_vpp;
|
|
struct componentname *a_cnp;
|
|
struct vattr *a_vap;
|
|
char *a_target;
|
|
} */ *ap = v;
|
|
struct vnode *dvp = ap->a_dvp;
|
|
struct vattr *vap = ap->a_vap;
|
|
struct componentname *cnp = ap->a_cnp;
|
|
struct nfsv2_sattr *sp;
|
|
u_int32_t *tl;
|
|
caddr_t cp;
|
|
int32_t t1, t2;
|
|
caddr_t bpos, dpos, cp2;
|
|
int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp;
|
|
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
|
|
struct vnode *newvp = (struct vnode *)0;
|
|
const int v3 = NFS_ISV3(dvp);
|
|
|
|
*ap->a_vpp = NULL;
|
|
nfsstats.rpccnt[NFSPROC_SYMLINK]++;
|
|
slen = strlen(ap->a_target);
|
|
nfsm_reqhead(dvp, NFSPROC_SYMLINK, NFSX_FH(v3) + 2*NFSX_UNSIGNED +
|
|
nfsm_rndup(cnp->cn_namelen) + nfsm_rndup(slen) + NFSX_SATTR(v3));
|
|
nfsm_fhtom(dvp, v3);
|
|
nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
|
|
if (v3)
|
|
nfsm_v3attrbuild(vap, FALSE);
|
|
nfsm_strtom(ap->a_target, slen, NFS_MAXPATHLEN);
|
|
if (!v3) {
|
|
nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
|
|
sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode);
|
|
sp->sa_uid = nfs_xdrneg1;
|
|
sp->sa_gid = nfs_xdrneg1;
|
|
sp->sa_size = nfs_xdrneg1;
|
|
txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
|
|
txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
|
|
}
|
|
nfsm_request(dvp, NFSPROC_SYMLINK, cnp->cn_proc, cnp->cn_cred);
|
|
if (v3) {
|
|
if (!error)
|
|
nfsm_mtofh(dvp, newvp, v3, gotvp);
|
|
nfsm_wcc_data(dvp, wccflag);
|
|
}
|
|
nfsm_reqdone;
|
|
/*
|
|
* Kludge: Map EEXIST => 0 assuming that it is a reply to a retry.
|
|
*/
|
|
if (error == EEXIST)
|
|
error = 0;
|
|
if (error == 0 && newvp == NULL) {
|
|
struct nfsnode *np = NULL;
|
|
|
|
error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
|
|
cnp->cn_cred, cnp->cn_proc, &np);
|
|
if (error == 0)
|
|
newvp = NFSTOV(np);
|
|
}
|
|
if (error) {
|
|
if (newvp != NULL)
|
|
vput(newvp);
|
|
} else {
|
|
*ap->a_vpp = newvp;
|
|
}
|
|
PNBUF_PUT(cnp->cn_pnbuf);
|
|
VTONFS(dvp)->n_flag |= NMODIFIED;
|
|
if (!wccflag)
|
|
VTONFS(dvp)->n_attrstamp = 0;
|
|
vput(dvp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* nfs make dir call
|
|
*/
|
|
int
|
|
nfs_mkdir(v)
|
|
void *v;
|
|
{
|
|
struct vop_mkdir_args /* {
|
|
struct vnode *a_dvp;
|
|
struct vnode **a_vpp;
|
|
struct componentname *a_cnp;
|
|
struct vattr *a_vap;
|
|
} */ *ap = v;
|
|
struct vnode *dvp = ap->a_dvp;
|
|
struct vattr *vap = ap->a_vap;
|
|
struct componentname *cnp = ap->a_cnp;
|
|
struct nfsv2_sattr *sp;
|
|
u_int32_t *tl;
|
|
caddr_t cp;
|
|
int32_t t1, t2;
|
|
int len;
|
|
struct nfsnode *np = (struct nfsnode *)0;
|
|
struct vnode *newvp = (struct vnode *)0;
|
|
caddr_t bpos, dpos, cp2;
|
|
int error = 0, wccflag = NFSV3_WCCRATTR;
|
|
int gotvp = 0;
|
|
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
|
|
const int v3 = NFS_ISV3(dvp);
|
|
|
|
len = cnp->cn_namelen;
|
|
nfsstats.rpccnt[NFSPROC_MKDIR]++;
|
|
nfsm_reqhead(dvp, NFSPROC_MKDIR,
|
|
NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len) + NFSX_SATTR(v3));
|
|
nfsm_fhtom(dvp, v3);
|
|
nfsm_strtom(cnp->cn_nameptr, len, NFS_MAXNAMLEN);
|
|
if (v3) {
|
|
nfsm_v3attrbuild(vap, FALSE);
|
|
} else {
|
|
nfsm_build(sp, struct nfsv2_sattr *, NFSX_V2SATTR);
|
|
sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode);
|
|
sp->sa_uid = nfs_xdrneg1;
|
|
sp->sa_gid = nfs_xdrneg1;
|
|
sp->sa_size = nfs_xdrneg1;
|
|
txdr_nfsv2time(&vap->va_atime, &sp->sa_atime);
|
|
txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime);
|
|
}
|
|
nfsm_request(dvp, NFSPROC_MKDIR, cnp->cn_proc, cnp->cn_cred);
|
|
if (!error)
|
|
nfsm_mtofh(dvp, newvp, v3, gotvp);
|
|
if (v3)
|
|
nfsm_wcc_data(dvp, wccflag);
|
|
nfsm_reqdone;
|
|
VTONFS(dvp)->n_flag |= NMODIFIED;
|
|
if (!wccflag)
|
|
VTONFS(dvp)->n_attrstamp = 0;
|
|
/*
|
|
* Kludge: Map EEXIST => 0 assuming that you have a reply to a retry
|
|
* if we can succeed in looking up the directory.
|
|
*/
|
|
if (error == EEXIST || (!error && !gotvp)) {
|
|
if (newvp) {
|
|
vput(newvp);
|
|
newvp = (struct vnode *)0;
|
|
}
|
|
error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred,
|
|
cnp->cn_proc, &np);
|
|
if (!error) {
|
|
newvp = NFSTOV(np);
|
|
if (newvp->v_type != VDIR)
|
|
error = EEXIST;
|
|
}
|
|
}
|
|
if (error) {
|
|
if (newvp)
|
|
vput(newvp);
|
|
} else {
|
|
if (cnp->cn_flags & MAKEENTRY)
|
|
cache_enter(dvp, newvp, cnp);
|
|
*ap->a_vpp = newvp;
|
|
}
|
|
PNBUF_PUT(cnp->cn_pnbuf);
|
|
vput(dvp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* nfs remove directory call
|
|
*/
|
|
int
|
|
nfs_rmdir(v)
|
|
void *v;
|
|
{
|
|
struct vop_rmdir_args /* {
|
|
struct vnode *a_dvp;
|
|
struct vnode *a_vp;
|
|
struct componentname *a_cnp;
|
|
} */ *ap = v;
|
|
struct vnode *vp = ap->a_vp;
|
|
struct vnode *dvp = ap->a_dvp;
|
|
struct componentname *cnp = ap->a_cnp;
|
|
u_int32_t *tl;
|
|
caddr_t cp;
|
|
int32_t t1, t2;
|
|
caddr_t bpos, dpos, cp2;
|
|
int error = 0, wccflag = NFSV3_WCCRATTR;
|
|
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
|
|
const int v3 = NFS_ISV3(dvp);
|
|
|
|
if (dvp == vp) {
|
|
vrele(dvp);
|
|
vput(dvp);
|
|
PNBUF_PUT(cnp->cn_pnbuf);
|
|
return (EINVAL);
|
|
}
|
|
nfsstats.rpccnt[NFSPROC_RMDIR]++;
|
|
nfsm_reqhead(dvp, NFSPROC_RMDIR,
|
|
NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(cnp->cn_namelen));
|
|
nfsm_fhtom(dvp, v3);
|
|
nfsm_strtom(cnp->cn_nameptr, cnp->cn_namelen, NFS_MAXNAMLEN);
|
|
nfsm_request(dvp, NFSPROC_RMDIR, cnp->cn_proc, cnp->cn_cred);
|
|
if (v3)
|
|
nfsm_wcc_data(dvp, wccflag);
|
|
nfsm_reqdone;
|
|
PNBUF_PUT(cnp->cn_pnbuf);
|
|
VTONFS(dvp)->n_flag |= NMODIFIED;
|
|
if (!wccflag)
|
|
VTONFS(dvp)->n_attrstamp = 0;
|
|
cache_purge(dvp);
|
|
cache_purge(vp);
|
|
vput(vp);
|
|
vput(dvp);
|
|
/*
|
|
* Kludge: Map ENOENT => 0 assuming that you have a reply to a retry.
|
|
*/
|
|
if (error == ENOENT)
|
|
error = 0;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* nfs readdir call
|
|
*/
|
|
int
|
|
nfs_readdir(v)
|
|
void *v;
|
|
{
|
|
struct vop_readdir_args /* {
|
|
struct vnode *a_vp;
|
|
struct uio *a_uio;
|
|
struct ucred *a_cred;
|
|
int *a_eofflag;
|
|
off_t **a_cookies;
|
|
int *a_ncookies;
|
|
} */ *ap = v;
|
|
struct vnode *vp = ap->a_vp;
|
|
struct uio *uio = ap->a_uio;
|
|
struct nfsmount *nmp = VFSTONFS(vp->v_mount);
|
|
char *base = uio->uio_iov->iov_base;
|
|
int tresid, error;
|
|
size_t count, lost;
|
|
struct dirent *dp;
|
|
off_t *cookies = NULL;
|
|
int ncookies = 0, nc;
|
|
|
|
if (vp->v_type != VDIR)
|
|
return (EPERM);
|
|
|
|
lost = uio->uio_resid & (NFS_DIRFRAGSIZ - 1);
|
|
count = uio->uio_resid - lost;
|
|
if (count <= 0)
|
|
return (EINVAL);
|
|
|
|
/*
|
|
* Call nfs_bioread() to do the real work.
|
|
*/
|
|
tresid = uio->uio_resid = count;
|
|
error = nfs_bioread(vp, uio, 0, ap->a_cred,
|
|
ap->a_cookies ? NFSBIO_CACHECOOKIES : 0);
|
|
|
|
if (!error && ap->a_cookies) {
|
|
ncookies = count / 16;
|
|
cookies = malloc(sizeof (off_t) * ncookies, M_TEMP, M_WAITOK);
|
|
*ap->a_cookies = cookies;
|
|
}
|
|
|
|
if (!error && uio->uio_resid == tresid) {
|
|
uio->uio_resid += lost;
|
|
nfsstats.direofcache_misses++;
|
|
if (ap->a_cookies)
|
|
*ap->a_ncookies = 0;
|
|
*ap->a_eofflag = 1;
|
|
return (0);
|
|
}
|
|
|
|
if (!error && ap->a_cookies) {
|
|
/*
|
|
* Only the NFS server and emulations use cookies, and they
|
|
* load the directory block into system space, so we can
|
|
* just look at it directly.
|
|
*/
|
|
if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1)
|
|
panic("nfs_readdir: lost in space");
|
|
for (nc = 0; ncookies-- &&
|
|
base < (char *)uio->uio_iov->iov_base; nc++){
|
|
dp = (struct dirent *) base;
|
|
if (dp->d_reclen == 0)
|
|
break;
|
|
if (nmp->nm_flag & NFSMNT_XLATECOOKIE)
|
|
*(cookies++) = (off_t)NFS_GETCOOKIE32(dp);
|
|
else
|
|
*(cookies++) = NFS_GETCOOKIE(dp);
|
|
base += dp->d_reclen;
|
|
}
|
|
uio->uio_resid +=
|
|
((caddr_t)uio->uio_iov->iov_base - base);
|
|
uio->uio_iov->iov_len +=
|
|
((caddr_t)uio->uio_iov->iov_base - base);
|
|
uio->uio_iov->iov_base = base;
|
|
*ap->a_ncookies = nc;
|
|
}
|
|
|
|
uio->uio_resid += lost;
|
|
*ap->a_eofflag = 0;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Readdir rpc call.
|
|
* Called from below the buffer cache by nfs_doio().
|
|
*/
|
|
int
|
|
nfs_readdirrpc(vp, uiop, cred)
|
|
struct vnode *vp;
|
|
struct uio *uiop;
|
|
struct ucred *cred;
|
|
{
|
|
int len, left;
|
|
struct dirent *dp = NULL;
|
|
u_int32_t *tl;
|
|
caddr_t cp;
|
|
int32_t t1, t2;
|
|
caddr_t bpos, dpos, cp2;
|
|
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
|
|
struct nfsmount *nmp = VFSTONFS(vp->v_mount);
|
|
struct nfsnode *dnp = VTONFS(vp);
|
|
u_quad_t fileno;
|
|
int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1;
|
|
int attrflag, nrpcs = 0, reclen;
|
|
const int v3 = NFS_ISV3(vp);
|
|
|
|
#ifdef DIAGNOSTIC
|
|
/*
|
|
* Should be called from buffer cache, so only amount of
|
|
* NFS_DIRBLKSIZ will be requested.
|
|
*/
|
|
if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1)))
|
|
panic("nfs readdirrpc bad uio");
|
|
#endif
|
|
|
|
/*
|
|
* Loop around doing readdir rpc's of size nm_readdirsize
|
|
* truncated to a multiple of NFS_DIRFRAGSIZ.
|
|
* The stopping criteria is EOF or buffer full.
|
|
*/
|
|
while (more_dirs && bigenough) {
|
|
/*
|
|
* Heuristic: don't bother to do another RPC to further
|
|
* fill up this block if there is not much room left. (< 50%
|
|
* of the readdir RPC size). This wastes some buffer space
|
|
* but can save up to 50% in RPC calls.
|
|
*/
|
|
if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) {
|
|
bigenough = 0;
|
|
break;
|
|
}
|
|
nfsstats.rpccnt[NFSPROC_READDIR]++;
|
|
nfsm_reqhead(vp, NFSPROC_READDIR, NFSX_FH(v3) +
|
|
NFSX_READDIR(v3));
|
|
nfsm_fhtom(vp, v3);
|
|
if (v3) {
|
|
nfsm_build(tl, u_int32_t *, 5 * NFSX_UNSIGNED);
|
|
if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) {
|
|
txdr_swapcookie3(uiop->uio_offset, tl);
|
|
} else {
|
|
txdr_cookie3(uiop->uio_offset, tl);
|
|
}
|
|
tl += 2;
|
|
*tl++ = dnp->n_cookieverf.nfsuquad[0];
|
|
*tl++ = dnp->n_cookieverf.nfsuquad[1];
|
|
} else {
|
|
nfsm_build(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
|
|
*tl++ = txdr_unsigned(uiop->uio_offset);
|
|
}
|
|
*tl = txdr_unsigned(nmp->nm_readdirsize);
|
|
nfsm_request(vp, NFSPROC_READDIR, uiop->uio_procp, cred);
|
|
nrpcs++;
|
|
if (v3) {
|
|
nfsm_postop_attr(vp, attrflag);
|
|
if (!error) {
|
|
nfsm_dissect(tl, u_int32_t *,
|
|
2 * NFSX_UNSIGNED);
|
|
dnp->n_cookieverf.nfsuquad[0] = *tl++;
|
|
dnp->n_cookieverf.nfsuquad[1] = *tl;
|
|
} else {
|
|
m_freem(mrep);
|
|
goto nfsmout;
|
|
}
|
|
}
|
|
nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
|
|
more_dirs = fxdr_unsigned(int, *tl);
|
|
|
|
/* loop thru the dir entries, doctoring them to 4bsd form */
|
|
while (more_dirs && bigenough) {
|
|
if (v3) {
|
|
nfsm_dissect(tl, u_int32_t *,
|
|
3 * NFSX_UNSIGNED);
|
|
fileno = fxdr_hyper(tl);
|
|
len = fxdr_unsigned(int, *(tl + 2));
|
|
} else {
|
|
nfsm_dissect(tl, u_int32_t *,
|
|
2 * NFSX_UNSIGNED);
|
|
fileno = fxdr_unsigned(u_quad_t, *tl++);
|
|
len = fxdr_unsigned(int, *tl);
|
|
}
|
|
if (len <= 0 || len > NFS_MAXNAMLEN) {
|
|
error = EBADRPC;
|
|
m_freem(mrep);
|
|
goto nfsmout;
|
|
}
|
|
tlen = nfsm_rndup(len);
|
|
if (tlen == len)
|
|
tlen += 4; /* To ensure null termination */
|
|
tlen += sizeof (off_t) + sizeof (int);
|
|
reclen = ALIGN(tlen + DIRHDSIZ);
|
|
tlen = reclen - DIRHDSIZ;
|
|
left = NFS_DIRFRAGSIZ - blksiz;
|
|
if (reclen > left) {
|
|
dp->d_reclen += left;
|
|
uiop->uio_iov->iov_base =
|
|
(caddr_t)uiop->uio_iov->iov_base + left;
|
|
uiop->uio_iov->iov_len -= left;
|
|
uiop->uio_resid -= left;
|
|
blksiz = 0;
|
|
NFS_STASHCOOKIE(dp, uiop->uio_offset);
|
|
}
|
|
if (reclen > uiop->uio_resid)
|
|
bigenough = 0;
|
|
if (bigenough) {
|
|
dp = (struct dirent *)uiop->uio_iov->iov_base;
|
|
dp->d_fileno = (int)fileno;
|
|
dp->d_namlen = len;
|
|
dp->d_reclen = reclen;
|
|
dp->d_type = DT_UNKNOWN;
|
|
blksiz += dp->d_reclen;
|
|
if (blksiz == NFS_DIRFRAGSIZ)
|
|
blksiz = 0;
|
|
uiop->uio_resid -= DIRHDSIZ;
|
|
uiop->uio_iov->iov_base =
|
|
(caddr_t)uiop->uio_iov->iov_base + DIRHDSIZ;
|
|
uiop->uio_iov->iov_len -= DIRHDSIZ;
|
|
nfsm_mtouio(uiop, len);
|
|
cp = uiop->uio_iov->iov_base;
|
|
tlen -= len;
|
|
*cp = '\0'; /* null terminate */
|
|
uiop->uio_iov->iov_base =
|
|
(caddr_t)uiop->uio_iov->iov_base + tlen;
|
|
uiop->uio_iov->iov_len -= tlen;
|
|
uiop->uio_resid -= tlen;
|
|
} else
|
|
nfsm_adv(nfsm_rndup(len));
|
|
if (v3) {
|
|
nfsm_dissect(tl, u_int32_t *,
|
|
3 * NFSX_UNSIGNED);
|
|
} else {
|
|
nfsm_dissect(tl, u_int32_t *,
|
|
2 * NFSX_UNSIGNED);
|
|
}
|
|
if (bigenough) {
|
|
if (v3) {
|
|
if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE)
|
|
uiop->uio_offset =
|
|
fxdr_swapcookie3(tl);
|
|
else
|
|
uiop->uio_offset =
|
|
fxdr_cookie3(tl);
|
|
}
|
|
else {
|
|
uiop->uio_offset =
|
|
fxdr_unsigned(off_t, *tl);
|
|
}
|
|
NFS_STASHCOOKIE(dp, uiop->uio_offset);
|
|
}
|
|
if (v3)
|
|
tl += 2;
|
|
else
|
|
tl++;
|
|
more_dirs = fxdr_unsigned(int, *tl);
|
|
}
|
|
/*
|
|
* If at end of rpc data, get the eof boolean
|
|
*/
|
|
if (!more_dirs) {
|
|
nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
|
|
more_dirs = (fxdr_unsigned(int, *tl) == 0);
|
|
}
|
|
m_freem(mrep);
|
|
}
|
|
/*
|
|
* Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ
|
|
* by increasing d_reclen for the last record.
|
|
*/
|
|
if (blksiz > 0) {
|
|
left = NFS_DIRFRAGSIZ - blksiz;
|
|
dp->d_reclen += left;
|
|
NFS_STASHCOOKIE(dp, uiop->uio_offset);
|
|
uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base +
|
|
left;
|
|
uiop->uio_iov->iov_len -= left;
|
|
uiop->uio_resid -= left;
|
|
}
|
|
|
|
/*
|
|
* We are now either at the end of the directory or have filled the
|
|
* block.
|
|
*/
|
|
if (bigenough)
|
|
dnp->n_direofoffset = uiop->uio_offset;
|
|
nfsmout:
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc().
|
|
*/
|
|
int
|
|
nfs_readdirplusrpc(vp, uiop, cred)
|
|
struct vnode *vp;
|
|
struct uio *uiop;
|
|
struct ucred *cred;
|
|
{
|
|
int len, left;
|
|
struct dirent *dp = NULL;
|
|
u_int32_t *tl;
|
|
caddr_t cp;
|
|
int32_t t1, t2;
|
|
struct vnode *newvp;
|
|
caddr_t bpos, dpos, cp2;
|
|
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
|
|
struct nameidata nami, *ndp = &nami;
|
|
struct componentname *cnp = &ndp->ni_cnd;
|
|
struct nfsmount *nmp = VFSTONFS(vp->v_mount);
|
|
struct nfsnode *dnp = VTONFS(vp), *np;
|
|
const unsigned char *hcp;
|
|
nfsfh_t *fhp;
|
|
u_quad_t fileno;
|
|
int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i;
|
|
int attrflag, fhsize, nrpcs = 0, reclen;
|
|
struct nfs_fattr fattr, *fp;
|
|
|
|
#ifdef DIAGNOSTIC
|
|
if (uiop->uio_iovcnt != 1 || (uiop->uio_resid & (NFS_DIRBLKSIZ - 1)))
|
|
panic("nfs readdirplusrpc bad uio");
|
|
#endif
|
|
ndp->ni_dvp = vp;
|
|
newvp = NULLVP;
|
|
|
|
/*
|
|
* Loop around doing readdir rpc's of size nm_readdirsize
|
|
* truncated to a multiple of NFS_DIRFRAGSIZ.
|
|
* The stopping criteria is EOF or buffer full.
|
|
*/
|
|
while (more_dirs && bigenough) {
|
|
if (nrpcs > 0 && uiop->uio_resid < (nmp->nm_readdirsize / 2)) {
|
|
bigenough = 0;
|
|
break;
|
|
}
|
|
nfsstats.rpccnt[NFSPROC_READDIRPLUS]++;
|
|
nfsm_reqhead(vp, NFSPROC_READDIRPLUS,
|
|
NFSX_FH(1) + 6 * NFSX_UNSIGNED);
|
|
nfsm_fhtom(vp, 1);
|
|
nfsm_build(tl, u_int32_t *, 6 * NFSX_UNSIGNED);
|
|
if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE) {
|
|
txdr_swapcookie3(uiop->uio_offset, tl);
|
|
} else {
|
|
txdr_cookie3(uiop->uio_offset, tl);
|
|
}
|
|
tl += 2;
|
|
*tl++ = dnp->n_cookieverf.nfsuquad[0];
|
|
*tl++ = dnp->n_cookieverf.nfsuquad[1];
|
|
*tl++ = txdr_unsigned(nmp->nm_readdirsize);
|
|
*tl = txdr_unsigned(nmp->nm_rsize);
|
|
nfsm_request(vp, NFSPROC_READDIRPLUS, uiop->uio_procp, cred);
|
|
nfsm_postop_attr(vp, attrflag);
|
|
if (error) {
|
|
m_freem(mrep);
|
|
goto nfsmout;
|
|
}
|
|
nrpcs++;
|
|
nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
|
|
dnp->n_cookieverf.nfsuquad[0] = *tl++;
|
|
dnp->n_cookieverf.nfsuquad[1] = *tl++;
|
|
more_dirs = fxdr_unsigned(int, *tl);
|
|
|
|
/* loop thru the dir entries, doctoring them to 4bsd form */
|
|
while (more_dirs && bigenough) {
|
|
nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
|
|
fileno = fxdr_hyper(tl);
|
|
len = fxdr_unsigned(int, *(tl + 2));
|
|
if (len <= 0 || len > NFS_MAXNAMLEN) {
|
|
error = EBADRPC;
|
|
m_freem(mrep);
|
|
goto nfsmout;
|
|
}
|
|
tlen = nfsm_rndup(len);
|
|
if (tlen == len)
|
|
tlen += 4; /* To ensure null termination*/
|
|
tlen += sizeof (off_t) + sizeof (int);
|
|
reclen = ALIGN(tlen + DIRHDSIZ);
|
|
tlen = reclen - DIRHDSIZ;
|
|
left = NFS_DIRFRAGSIZ - blksiz;
|
|
if (reclen > left) {
|
|
/*
|
|
* DIRFRAGSIZ is aligned, no need to align
|
|
* again here.
|
|
*/
|
|
dp->d_reclen += left;
|
|
uiop->uio_iov->iov_base =
|
|
(caddr_t)uiop->uio_iov->iov_base + left;
|
|
uiop->uio_iov->iov_len -= left;
|
|
uiop->uio_resid -= left;
|
|
NFS_STASHCOOKIE(dp, uiop->uio_offset);
|
|
blksiz = 0;
|
|
}
|
|
if (reclen > uiop->uio_resid)
|
|
bigenough = 0;
|
|
if (bigenough) {
|
|
dp = (struct dirent *)uiop->uio_iov->iov_base;
|
|
dp->d_fileno = (int)fileno;
|
|
dp->d_namlen = len;
|
|
dp->d_reclen = reclen;
|
|
dp->d_type = DT_UNKNOWN;
|
|
blksiz += dp->d_reclen;
|
|
if (blksiz == NFS_DIRFRAGSIZ)
|
|
blksiz = 0;
|
|
uiop->uio_resid -= DIRHDSIZ;
|
|
uiop->uio_iov->iov_base =
|
|
(caddr_t)uiop->uio_iov->iov_base +
|
|
DIRHDSIZ;
|
|
uiop->uio_iov->iov_len -= DIRHDSIZ;
|
|
cnp->cn_nameptr = uiop->uio_iov->iov_base;
|
|
cnp->cn_namelen = len;
|
|
nfsm_mtouio(uiop, len);
|
|
cp = uiop->uio_iov->iov_base;
|
|
tlen -= len;
|
|
*cp = '\0';
|
|
uiop->uio_iov->iov_base =
|
|
(caddr_t)uiop->uio_iov->iov_base + tlen;
|
|
uiop->uio_iov->iov_len -= tlen;
|
|
uiop->uio_resid -= tlen;
|
|
} else
|
|
nfsm_adv(nfsm_rndup(len));
|
|
nfsm_dissect(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
|
|
if (bigenough) {
|
|
if (nmp->nm_iflag & NFSMNT_SWAPCOOKIE)
|
|
uiop->uio_offset =
|
|
fxdr_swapcookie3(tl);
|
|
else
|
|
uiop->uio_offset =
|
|
fxdr_cookie3(tl);
|
|
NFS_STASHCOOKIE(dp, uiop->uio_offset);
|
|
}
|
|
tl += 2;
|
|
|
|
/*
|
|
* Since the attributes are before the file handle
|
|
* (sigh), we must skip over the attributes and then
|
|
* come back and get them.
|
|
*/
|
|
attrflag = fxdr_unsigned(int, *tl);
|
|
if (attrflag) {
|
|
nfsm_dissect(fp, struct nfs_fattr *, NFSX_V3FATTR);
|
|
memcpy(&fattr, fp, NFSX_V3FATTR);
|
|
nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
|
|
doit = fxdr_unsigned(int, *tl);
|
|
if (doit) {
|
|
nfsm_getfh(fhp, fhsize, 1);
|
|
if (NFS_CMPFH(dnp, fhp, fhsize)) {
|
|
VREF(vp);
|
|
newvp = vp;
|
|
np = dnp;
|
|
} else {
|
|
error = nfs_nget(vp->v_mount, fhp,
|
|
fhsize, &np);
|
|
if (!error)
|
|
newvp = NFSTOV(np);
|
|
}
|
|
if (!error) {
|
|
nfs_loadattrcache(&newvp, &fattr, 0);
|
|
dp->d_type =
|
|
IFTODT(VTTOIF(np->n_vattr->va_type));
|
|
ndp->ni_vp = newvp;
|
|
cnp->cn_hash = 0;
|
|
for (hcp = cnp->cn_nameptr, i = 1; i <= len;
|
|
i++, hcp++)
|
|
cnp->cn_hash += *hcp * i;
|
|
if (cnp->cn_namelen <= NCHNAMLEN)
|
|
cache_enter(ndp->ni_dvp, ndp->ni_vp,
|
|
cnp);
|
|
}
|
|
}
|
|
} else {
|
|
/* Just skip over the file handle */
|
|
nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
|
|
i = fxdr_unsigned(int, *tl);
|
|
nfsm_adv(nfsm_rndup(i));
|
|
}
|
|
if (newvp != NULLVP) {
|
|
vrele(newvp);
|
|
if (newvp != vp)
|
|
VOP_UNLOCK(vp, 0);
|
|
newvp = NULLVP;
|
|
}
|
|
nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
|
|
more_dirs = fxdr_unsigned(int, *tl);
|
|
}
|
|
/*
|
|
* If at end of rpc data, get the eof boolean
|
|
*/
|
|
if (!more_dirs) {
|
|
nfsm_dissect(tl, u_int32_t *, NFSX_UNSIGNED);
|
|
more_dirs = (fxdr_unsigned(int, *tl) == 0);
|
|
}
|
|
m_freem(mrep);
|
|
}
|
|
/*
|
|
* Fill last record, iff any, out to a multiple of NFS_DIRFRAGSIZ
|
|
* by increasing d_reclen for the last record.
|
|
*/
|
|
if (blksiz > 0) {
|
|
left = NFS_DIRFRAGSIZ - blksiz;
|
|
dp->d_reclen += left;
|
|
NFS_STASHCOOKIE(dp, uiop->uio_offset);
|
|
uiop->uio_iov->iov_base = (caddr_t)uiop->uio_iov->iov_base +
|
|
left;
|
|
uiop->uio_iov->iov_len -= left;
|
|
uiop->uio_resid -= left;
|
|
}
|
|
|
|
/*
|
|
* We are now either at the end of the directory or have filled the
|
|
* block.
|
|
*/
|
|
if (bigenough)
|
|
dnp->n_direofoffset = uiop->uio_offset;
|
|
nfsmout:
|
|
if (newvp != NULLVP) {
|
|
vrele(newvp);
|
|
if (newvp != vp)
|
|
VOP_UNLOCK(vp, 0);
|
|
}
|
|
return (error);
|
|
}
|
|
static char hextoasc[] = "0123456789abcdef";
|
|
|
|
/*
|
|
* Silly rename. To make the NFS filesystem that is stateless look a little
|
|
* more like the "ufs" a remove of an active vnode is translated to a rename
|
|
* to a funny looking filename that is removed by nfs_inactive on the
|
|
* nfsnode. There is the potential for another process on a different client
|
|
* to create the same funny name between the nfs_lookitup() fails and the
|
|
* nfs_rename() completes, but...
|
|
*/
|
|
int
|
|
nfs_sillyrename(dvp, vp, cnp)
|
|
struct vnode *dvp, *vp;
|
|
struct componentname *cnp;
|
|
{
|
|
struct sillyrename *sp;
|
|
struct nfsnode *np;
|
|
int error;
|
|
short pid;
|
|
|
|
cache_purge(dvp);
|
|
np = VTONFS(vp);
|
|
#ifndef DIAGNOSTIC
|
|
if (vp->v_type == VDIR)
|
|
panic("nfs: sillyrename dir");
|
|
#endif
|
|
MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename),
|
|
M_NFSREQ, M_WAITOK);
|
|
sp->s_cred = crdup(cnp->cn_cred);
|
|
sp->s_dvp = dvp;
|
|
VREF(dvp);
|
|
|
|
/* Fudge together a funny name */
|
|
pid = cnp->cn_proc->p_pid;
|
|
memcpy(sp->s_name, ".nfsAxxxx4.4", 13);
|
|
sp->s_namlen = 12;
|
|
sp->s_name[8] = hextoasc[pid & 0xf];
|
|
sp->s_name[7] = hextoasc[(pid >> 4) & 0xf];
|
|
sp->s_name[6] = hextoasc[(pid >> 8) & 0xf];
|
|
sp->s_name[5] = hextoasc[(pid >> 12) & 0xf];
|
|
|
|
/* Try lookitups until we get one that isn't there */
|
|
while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
|
|
cnp->cn_proc, (struct nfsnode **)0) == 0) {
|
|
sp->s_name[4]++;
|
|
if (sp->s_name[4] > 'z') {
|
|
error = EINVAL;
|
|
goto bad;
|
|
}
|
|
}
|
|
error = nfs_renameit(dvp, cnp, sp);
|
|
if (error)
|
|
goto bad;
|
|
error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
|
|
cnp->cn_proc, &np);
|
|
np->n_sillyrename = sp;
|
|
return (0);
|
|
bad:
|
|
vrele(sp->s_dvp);
|
|
crfree(sp->s_cred);
|
|
free((caddr_t)sp, M_NFSREQ);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Look up a file name and optionally either update the file handle or
|
|
* allocate an nfsnode, depending on the value of npp.
|
|
* npp == NULL --> just do the lookup
|
|
* *npp == NULL --> allocate a new nfsnode and make sure attributes are
|
|
* handled too
|
|
* *npp != NULL --> update the file handle in the vnode
|
|
*/
|
|
int
|
|
nfs_lookitup(dvp, name, len, cred, procp, npp)
|
|
struct vnode *dvp;
|
|
const char *name;
|
|
int len;
|
|
struct ucred *cred;
|
|
struct proc *procp;
|
|
struct nfsnode **npp;
|
|
{
|
|
u_int32_t *tl;
|
|
caddr_t cp;
|
|
int32_t t1, t2;
|
|
struct vnode *newvp = (struct vnode *)0;
|
|
struct nfsnode *np, *dnp = VTONFS(dvp);
|
|
caddr_t bpos, dpos, cp2;
|
|
int error = 0, fhlen, attrflag;
|
|
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
|
|
nfsfh_t *nfhp;
|
|
const int v3 = NFS_ISV3(dvp);
|
|
|
|
nfsstats.rpccnt[NFSPROC_LOOKUP]++;
|
|
nfsm_reqhead(dvp, NFSPROC_LOOKUP,
|
|
NFSX_FH(v3) + NFSX_UNSIGNED + nfsm_rndup(len));
|
|
nfsm_fhtom(dvp, v3);
|
|
nfsm_strtom(name, len, NFS_MAXNAMLEN);
|
|
nfsm_request(dvp, NFSPROC_LOOKUP, procp, cred);
|
|
if (npp && !error) {
|
|
nfsm_getfh(nfhp, fhlen, v3);
|
|
if (*npp) {
|
|
np = *npp;
|
|
if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) {
|
|
free((caddr_t)np->n_fhp, M_NFSBIGFH);
|
|
np->n_fhp = &np->n_fh;
|
|
} else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH)
|
|
np->n_fhp =(nfsfh_t *)malloc(fhlen,M_NFSBIGFH,M_WAITOK);
|
|
memcpy((caddr_t)np->n_fhp, (caddr_t)nfhp, fhlen);
|
|
np->n_fhsize = fhlen;
|
|
newvp = NFSTOV(np);
|
|
} else if (NFS_CMPFH(dnp, nfhp, fhlen)) {
|
|
VREF(dvp);
|
|
newvp = dvp;
|
|
} else {
|
|
error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np);
|
|
if (error) {
|
|
m_freem(mrep);
|
|
return (error);
|
|
}
|
|
newvp = NFSTOV(np);
|
|
}
|
|
if (v3) {
|
|
nfsm_postop_attr(newvp, attrflag);
|
|
if (!attrflag && *npp == NULL) {
|
|
m_freem(mrep);
|
|
vput(newvp);
|
|
return (ENOENT);
|
|
}
|
|
} else
|
|
nfsm_loadattr(newvp, (struct vattr *)0);
|
|
}
|
|
nfsm_reqdone;
|
|
if (npp && *npp == NULL) {
|
|
if (error) {
|
|
if (newvp)
|
|
vput(newvp);
|
|
} else
|
|
*npp = np;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Nfs Version 3 commit rpc
|
|
*/
|
|
int
|
|
nfs_commit(vp, offset, cnt, procp)
|
|
struct vnode *vp;
|
|
off_t offset;
|
|
uint32_t cnt;
|
|
struct proc *procp;
|
|
{
|
|
caddr_t cp;
|
|
u_int32_t *tl;
|
|
int32_t t1, t2;
|
|
struct nfsmount *nmp = VFSTONFS(vp->v_mount);
|
|
caddr_t bpos, dpos, cp2;
|
|
int error = 0, wccflag = NFSV3_WCCRATTR;
|
|
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
|
|
|
|
#ifdef fvdl_debug
|
|
printf("commit %lu - %lu\n", (unsigned long)offset,
|
|
(unsigned long)(offset + cnt));
|
|
#endif
|
|
|
|
if ((nmp->nm_iflag & NFSMNT_HASWRITEVERF) == 0)
|
|
return (0);
|
|
nfsstats.rpccnt[NFSPROC_COMMIT]++;
|
|
nfsm_reqhead(vp, NFSPROC_COMMIT, NFSX_FH(1));
|
|
nfsm_fhtom(vp, 1);
|
|
nfsm_build(tl, u_int32_t *, 3 * NFSX_UNSIGNED);
|
|
txdr_hyper(offset, tl);
|
|
tl += 2;
|
|
*tl = txdr_unsigned(cnt);
|
|
nfsm_request(vp, NFSPROC_COMMIT, procp, VTONFS(vp)->n_wcred);
|
|
nfsm_wcc_data(vp, wccflag);
|
|
if (!error) {
|
|
nfsm_dissect(tl, u_int32_t *, NFSX_V3WRITEVERF);
|
|
if (memcmp((caddr_t)nmp->nm_verf, (caddr_t)tl,
|
|
NFSX_V3WRITEVERF)) {
|
|
memcpy((caddr_t)nmp->nm_verf, (caddr_t)tl,
|
|
NFSX_V3WRITEVERF);
|
|
error = NFSERR_STALEWRITEVERF;
|
|
}
|
|
}
|
|
nfsm_reqdone;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Kludge City..
|
|
* - make nfs_bmap() essentially a no-op that does no translation
|
|
* - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc
|
|
* (Maybe I could use the process's page mapping, but I was concerned that
|
|
* Kernel Write might not be enabled and also figured copyout() would do
|
|
* a lot more work than memcpy() and also it currently happens in the
|
|
* context of the swapper process (2).
|
|
*/
|
|
int
|
|
nfs_bmap(v)
|
|
void *v;
|
|
{
|
|
struct vop_bmap_args /* {
|
|
struct vnode *a_vp;
|
|
daddr_t a_bn;
|
|
struct vnode **a_vpp;
|
|
daddr_t *a_bnp;
|
|
int *a_runp;
|
|
} */ *ap = v;
|
|
struct vnode *vp = ap->a_vp;
|
|
int bshift = vp->v_mount->mnt_fs_bshift - vp->v_mount->mnt_dev_bshift;
|
|
|
|
if (ap->a_vpp != NULL)
|
|
*ap->a_vpp = vp;
|
|
if (ap->a_bnp != NULL)
|
|
*ap->a_bnp = ap->a_bn << bshift;
|
|
if (ap->a_runp != NULL)
|
|
*ap->a_runp = 1024 * 1024; /* XXX */
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Strategy routine.
|
|
* For async requests when nfsiod(s) are running, queue the request by
|
|
* calling nfs_asyncio(), otherwise just all nfs_doio() to do the
|
|
* request.
|
|
*/
|
|
int
|
|
nfs_strategy(v)
|
|
void *v;
|
|
{
|
|
struct vop_strategy_args *ap = v;
|
|
struct buf *bp = ap->a_bp;
|
|
struct proc *p;
|
|
int error = 0;
|
|
|
|
if ((bp->b_flags & (B_PHYS|B_ASYNC)) == (B_PHYS|B_ASYNC))
|
|
panic("nfs physio/async");
|
|
if (bp->b_flags & B_ASYNC)
|
|
p = NULL;
|
|
else
|
|
p = curproc; /* XXX */
|
|
|
|
/*
|
|
* If the op is asynchronous and an i/o daemon is waiting
|
|
* queue the request, wake it up and wait for completion
|
|
* otherwise just do it ourselves.
|
|
*/
|
|
|
|
if ((bp->b_flags & B_ASYNC) == 0 ||
|
|
nfs_asyncio(bp))
|
|
error = nfs_doio(bp, p);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* fsync vnode op. Just call nfs_flush() with commit == 1.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
nfs_fsync(v)
|
|
void *v;
|
|
{
|
|
struct vop_fsync_args /* {
|
|
struct vnodeop_desc *a_desc;
|
|
struct vnode * a_vp;
|
|
struct ucred * a_cred;
|
|
int a_flags;
|
|
off_t offlo;
|
|
off_t offhi;
|
|
struct proc * a_p;
|
|
} */ *ap = v;
|
|
|
|
return (nfs_flush(ap->a_vp, ap->a_cred,
|
|
(ap->a_flags & FSYNC_WAIT) != 0 ? MNT_WAIT : 0, ap->a_p, 1));
|
|
}
|
|
|
|
/*
|
|
* Flush all the data associated with a vnode.
|
|
*/
|
|
int
|
|
nfs_flush(vp, cred, waitfor, p, commit)
|
|
struct vnode *vp;
|
|
struct ucred *cred;
|
|
int waitfor;
|
|
struct proc *p;
|
|
int commit;
|
|
{
|
|
struct uvm_object *uobj = &vp->v_uobj;
|
|
struct nfsnode *np = VTONFS(vp);
|
|
int error;
|
|
int flushflags = PGO_ALLPAGES|PGO_CLEANIT|PGO_SYNCIO;
|
|
UVMHIST_FUNC("nfs_flush"); UVMHIST_CALLED(ubchist);
|
|
|
|
simple_lock(&uobj->vmobjlock);
|
|
error = (uobj->pgops->pgo_put)(uobj, 0, 0, flushflags);
|
|
if (np->n_flag & NWRITEERR) {
|
|
error = np->n_error;
|
|
np->n_flag &= ~NWRITEERR;
|
|
}
|
|
UVMHIST_LOG(ubchist, "returning %d", error,0,0,0);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Return POSIX pathconf information applicable to nfs.
|
|
*
|
|
* N.B. The NFS V2 protocol doesn't support this RPC.
|
|
*/
|
|
/* ARGSUSED */
|
|
int
|
|
nfs_pathconf(v)
|
|
void *v;
|
|
{
|
|
struct vop_pathconf_args /* {
|
|
struct vnode *a_vp;
|
|
int a_name;
|
|
register_t *a_retval;
|
|
} */ *ap = v;
|
|
struct nfsv3_pathconf *pcp;
|
|
struct vnode *vp = ap->a_vp;
|
|
struct nfsmount *nmp;
|
|
struct mbuf *mreq, *mrep, *md, *mb, *mb2;
|
|
int32_t t1, t2;
|
|
u_int32_t *tl;
|
|
caddr_t bpos, dpos, cp, cp2;
|
|
int error = 0, attrflag;
|
|
unsigned int l;
|
|
u_int64_t maxsize;
|
|
const int v3 = NFS_ISV3(vp);
|
|
|
|
switch (ap->a_name) {
|
|
/* Names that can be resolved locally. */
|
|
case _PC_PIPE_BUF:
|
|
*ap->a_retval = PIPE_BUF;
|
|
break;
|
|
case _PC_SYNC_IO:
|
|
*ap->a_retval = 1;
|
|
break;
|
|
/* Names that cannot be resolved locally; do an RPC, if possible. */
|
|
case _PC_LINK_MAX:
|
|
case _PC_NAME_MAX:
|
|
case _PC_CHOWN_RESTRICTED:
|
|
case _PC_NO_TRUNC:
|
|
if (!v3) {
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
nfsstats.rpccnt[NFSPROC_PATHCONF]++;
|
|
nfsm_reqhead(vp, NFSPROC_PATHCONF, NFSX_FH(1));
|
|
nfsm_fhtom(vp, 1);
|
|
nfsm_request(vp, NFSPROC_PATHCONF,
|
|
curproc, curproc->p_ucred); /* XXX */
|
|
nfsm_postop_attr(vp, attrflag);
|
|
if (!error) {
|
|
nfsm_dissect(pcp, struct nfsv3_pathconf *,
|
|
NFSX_V3PATHCONF);
|
|
switch (ap->a_name) {
|
|
case _PC_LINK_MAX:
|
|
*ap->a_retval =
|
|
fxdr_unsigned(register_t, pcp->pc_linkmax);
|
|
break;
|
|
case _PC_NAME_MAX:
|
|
*ap->a_retval =
|
|
fxdr_unsigned(register_t, pcp->pc_namemax);
|
|
break;
|
|
case _PC_CHOWN_RESTRICTED:
|
|
*ap->a_retval =
|
|
(pcp->pc_chownrestricted == nfs_true);
|
|
break;
|
|
case _PC_NO_TRUNC:
|
|
*ap->a_retval =
|
|
(pcp->pc_notrunc == nfs_true);
|
|
break;
|
|
}
|
|
}
|
|
nfsm_reqdone;
|
|
break;
|
|
case _PC_FILESIZEBITS:
|
|
if (v3) {
|
|
nmp = VFSTONFS(vp->v_mount);
|
|
if ((nmp->nm_iflag & NFSMNT_GOTFSINFO) == 0)
|
|
if ((error = nfs_fsinfo(nmp, vp,
|
|
curproc->p_ucred, curproc)) != 0) /* XXX */
|
|
break;
|
|
for (l = 0, maxsize = nmp->nm_maxfilesize;
|
|
(maxsize >> l) > 0; l++)
|
|
;
|
|
*ap->a_retval = l + 1;
|
|
} else {
|
|
*ap->a_retval = 32; /* NFS V2 limitation */
|
|
}
|
|
break;
|
|
default:
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* NFS advisory byte-level locks.
|
|
*/
|
|
int
|
|
nfs_advlock(v)
|
|
void *v;
|
|
{
|
|
struct vop_advlock_args /* {
|
|
struct vnode *a_vp;
|
|
caddr_t a_id;
|
|
int a_op;
|
|
struct flock *a_fl;
|
|
int a_flags;
|
|
} */ *ap = v;
|
|
struct nfsnode *np = VTONFS(ap->a_vp);
|
|
|
|
return lf_advlock(ap, &np->n_lockf, np->n_size);
|
|
}
|
|
|
|
/*
|
|
* Print out the contents of an nfsnode.
|
|
*/
|
|
int
|
|
nfs_print(v)
|
|
void *v;
|
|
{
|
|
struct vop_print_args /* {
|
|
struct vnode *a_vp;
|
|
} */ *ap = v;
|
|
struct vnode *vp = ap->a_vp;
|
|
struct nfsnode *np = VTONFS(vp);
|
|
|
|
printf("tag VT_NFS, fileid %ld fsid 0x%lx",
|
|
np->n_vattr->va_fileid, np->n_vattr->va_fsid);
|
|
if (vp->v_type == VFIFO)
|
|
fifo_printinfo(vp);
|
|
printf("\n");
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* NFS file truncation.
|
|
*/
|
|
int
|
|
nfs_truncate(v)
|
|
void *v;
|
|
{
|
|
#if 0
|
|
struct vop_truncate_args /* {
|
|
struct vnode *a_vp;
|
|
off_t a_length;
|
|
int a_flags;
|
|
struct ucred *a_cred;
|
|
struct proc *a_p;
|
|
} */ *ap = v;
|
|
#endif
|
|
|
|
/* Use nfs_setattr */
|
|
return (EOPNOTSUPP);
|
|
}
|
|
|
|
/*
|
|
* NFS update.
|
|
*/
|
|
int
|
|
nfs_update(v)
|
|
void *v;
|
|
#if 0
|
|
struct vop_update_args /* {
|
|
struct vnode *a_vp;
|
|
struct timespec *a_ta;
|
|
struct timespec *a_tm;
|
|
int a_waitfor;
|
|
} */ *ap = v;
|
|
#endif
|
|
{
|
|
|
|
/* Use nfs_setattr */
|
|
return (EOPNOTSUPP);
|
|
}
|
|
|
|
/*
|
|
* Just call bwrite().
|
|
*/
|
|
int
|
|
nfs_bwrite(v)
|
|
void *v;
|
|
{
|
|
struct vop_bwrite_args /* {
|
|
struct vnode *a_bp;
|
|
} */ *ap = v;
|
|
|
|
return (bwrite(ap->a_bp));
|
|
}
|
|
|
|
/*
|
|
* nfs special file access vnode op.
|
|
* Essentially just get vattr and then imitate iaccess() since the device is
|
|
* local to the client.
|
|
*/
|
|
int
|
|
nfsspec_access(v)
|
|
void *v;
|
|
{
|
|
struct vop_access_args /* {
|
|
struct vnode *a_vp;
|
|
int a_mode;
|
|
struct ucred *a_cred;
|
|
struct proc *a_p;
|
|
} */ *ap = v;
|
|
struct vattr va;
|
|
struct vnode *vp = ap->a_vp;
|
|
int error;
|
|
|
|
error = VOP_GETATTR(vp, &va, ap->a_cred, ap->a_p);
|
|
if (error)
|
|
return (error);
|
|
|
|
/*
|
|
* Disallow write attempts on filesystems mounted read-only;
|
|
* unless the file is a socket, fifo, or a block or character
|
|
* device resident on the filesystem.
|
|
*/
|
|
if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
|
|
switch (vp->v_type) {
|
|
case VREG:
|
|
case VDIR:
|
|
case VLNK:
|
|
return (EROFS);
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
return (vaccess(va.va_type, va.va_mode,
|
|
va.va_uid, va.va_gid, ap->a_mode, ap->a_cred));
|
|
}
|
|
|
|
/*
|
|
* Read wrapper for special devices.
|
|
*/
|
|
int
|
|
nfsspec_read(v)
|
|
void *v;
|
|
{
|
|
struct vop_read_args /* {
|
|
struct vnode *a_vp;
|
|
struct uio *a_uio;
|
|
int a_ioflag;
|
|
struct ucred *a_cred;
|
|
} */ *ap = v;
|
|
struct nfsnode *np = VTONFS(ap->a_vp);
|
|
|
|
/*
|
|
* Set access flag.
|
|
*/
|
|
np->n_flag |= NACC;
|
|
np->n_atim.tv_sec = time.tv_sec;
|
|
np->n_atim.tv_nsec = time.tv_usec * 1000;
|
|
return (VOCALL(spec_vnodeop_p, VOFFSET(vop_read), ap));
|
|
}
|
|
|
|
/*
|
|
* Write wrapper for special devices.
|
|
*/
|
|
int
|
|
nfsspec_write(v)
|
|
void *v;
|
|
{
|
|
struct vop_write_args /* {
|
|
struct vnode *a_vp;
|
|
struct uio *a_uio;
|
|
int a_ioflag;
|
|
struct ucred *a_cred;
|
|
} */ *ap = v;
|
|
struct nfsnode *np = VTONFS(ap->a_vp);
|
|
|
|
/*
|
|
* Set update flag.
|
|
*/
|
|
np->n_flag |= NUPD;
|
|
np->n_mtim.tv_sec = time.tv_sec;
|
|
np->n_mtim.tv_nsec = time.tv_usec * 1000;
|
|
return (VOCALL(spec_vnodeop_p, VOFFSET(vop_write), ap));
|
|
}
|
|
|
|
/*
|
|
* Close wrapper for special devices.
|
|
*
|
|
* Update the times on the nfsnode then do device close.
|
|
*/
|
|
int
|
|
nfsspec_close(v)
|
|
void *v;
|
|
{
|
|
struct vop_close_args /* {
|
|
struct vnode *a_vp;
|
|
int a_fflag;
|
|
struct ucred *a_cred;
|
|
struct proc *a_p;
|
|
} */ *ap = v;
|
|
struct vnode *vp = ap->a_vp;
|
|
struct nfsnode *np = VTONFS(vp);
|
|
struct vattr vattr;
|
|
|
|
if (np->n_flag & (NACC | NUPD)) {
|
|
np->n_flag |= NCHG;
|
|
if (vp->v_usecount == 1 &&
|
|
(vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
|
|
VATTR_NULL(&vattr);
|
|
if (np->n_flag & NACC)
|
|
vattr.va_atime = np->n_atim;
|
|
if (np->n_flag & NUPD)
|
|
vattr.va_mtime = np->n_mtim;
|
|
(void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p);
|
|
}
|
|
}
|
|
return (VOCALL(spec_vnodeop_p, VOFFSET(vop_close), ap));
|
|
}
|
|
|
|
/*
|
|
* Read wrapper for fifos.
|
|
*/
|
|
int
|
|
nfsfifo_read(v)
|
|
void *v;
|
|
{
|
|
struct vop_read_args /* {
|
|
struct vnode *a_vp;
|
|
struct uio *a_uio;
|
|
int a_ioflag;
|
|
struct ucred *a_cred;
|
|
} */ *ap = v;
|
|
struct nfsnode *np = VTONFS(ap->a_vp);
|
|
|
|
/*
|
|
* Set access flag.
|
|
*/
|
|
np->n_flag |= NACC;
|
|
np->n_atim.tv_sec = time.tv_sec;
|
|
np->n_atim.tv_nsec = time.tv_usec * 1000;
|
|
return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_read), ap));
|
|
}
|
|
|
|
/*
|
|
* Write wrapper for fifos.
|
|
*/
|
|
int
|
|
nfsfifo_write(v)
|
|
void *v;
|
|
{
|
|
struct vop_write_args /* {
|
|
struct vnode *a_vp;
|
|
struct uio *a_uio;
|
|
int a_ioflag;
|
|
struct ucred *a_cred;
|
|
} */ *ap = v;
|
|
struct nfsnode *np = VTONFS(ap->a_vp);
|
|
|
|
/*
|
|
* Set update flag.
|
|
*/
|
|
np->n_flag |= NUPD;
|
|
np->n_mtim.tv_sec = time.tv_sec;
|
|
np->n_mtim.tv_nsec = time.tv_usec * 1000;
|
|
return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_write), ap));
|
|
}
|
|
|
|
/*
|
|
* Close wrapper for fifos.
|
|
*
|
|
* Update the times on the nfsnode then do fifo close.
|
|
*/
|
|
int
|
|
nfsfifo_close(v)
|
|
void *v;
|
|
{
|
|
struct vop_close_args /* {
|
|
struct vnode *a_vp;
|
|
int a_fflag;
|
|
struct ucred *a_cred;
|
|
struct proc *a_p;
|
|
} */ *ap = v;
|
|
struct vnode *vp = ap->a_vp;
|
|
struct nfsnode *np = VTONFS(vp);
|
|
struct vattr vattr;
|
|
|
|
if (np->n_flag & (NACC | NUPD)) {
|
|
if (np->n_flag & NACC) {
|
|
np->n_atim.tv_sec = time.tv_sec;
|
|
np->n_atim.tv_nsec = time.tv_usec * 1000;
|
|
}
|
|
if (np->n_flag & NUPD) {
|
|
np->n_mtim.tv_sec = time.tv_sec;
|
|
np->n_mtim.tv_nsec = time.tv_usec * 1000;
|
|
}
|
|
np->n_flag |= NCHG;
|
|
if (vp->v_usecount == 1 &&
|
|
(vp->v_mount->mnt_flag & MNT_RDONLY) == 0) {
|
|
VATTR_NULL(&vattr);
|
|
if (np->n_flag & NACC)
|
|
vattr.va_atime = np->n_atim;
|
|
if (np->n_flag & NUPD)
|
|
vattr.va_mtime = np->n_mtim;
|
|
(void)VOP_SETATTR(vp, &vattr, ap->a_cred, ap->a_p);
|
|
}
|
|
}
|
|
return (VOCALL(fifo_vnodeop_p, VOFFSET(vop_close), ap));
|
|
}
|