4565 lines
120 KiB
C
4565 lines
120 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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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. 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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* from nfs_vnops.c 8.16 (Berkeley) 5/27/95
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*/
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#include <sys/cdefs.h>
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/*
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* vnode op calls for Sun NFS version 2, 3 and 4
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*/
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#include "opt_inet.h"
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#include <sys/param.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/bio.h>
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#include <sys/buf.h>
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#include <sys/extattr.h>
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#include <sys/filio.h>
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#include <sys/jail.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/socket.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/sysctl.h>
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#include <sys/signalvar.h>
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#include <vm/vm.h>
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#include <vm/vm_extern.h>
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#include <vm/vm_object.h>
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#include <fs/nfs/nfsport.h>
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#include <fs/nfsclient/nfsnode.h>
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#include <fs/nfsclient/nfsmount.h>
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#include <fs/nfsclient/nfs.h>
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#include <fs/nfsclient/nfs_kdtrace.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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#include <nfs/nfs_lock.h>
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#ifdef KDTRACE_HOOKS
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#include <sys/dtrace_bsd.h>
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dtrace_nfsclient_accesscache_flush_probe_func_t
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dtrace_nfscl_accesscache_flush_done_probe;
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uint32_t nfscl_accesscache_flush_done_id;
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dtrace_nfsclient_accesscache_get_probe_func_t
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dtrace_nfscl_accesscache_get_hit_probe,
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dtrace_nfscl_accesscache_get_miss_probe;
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uint32_t nfscl_accesscache_get_hit_id;
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uint32_t nfscl_accesscache_get_miss_id;
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dtrace_nfsclient_accesscache_load_probe_func_t
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dtrace_nfscl_accesscache_load_done_probe;
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uint32_t nfscl_accesscache_load_done_id;
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#endif /* !KDTRACE_HOOKS */
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/* Defs */
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#define TRUE 1
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#define FALSE 0
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extern struct nfsstatsv1 nfsstatsv1;
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extern int nfsrv_useacl;
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extern int nfscl_debuglevel;
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MALLOC_DECLARE(M_NEWNFSREQ);
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static vop_read_t nfsfifo_read;
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static vop_write_t nfsfifo_write;
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static vop_close_t nfsfifo_close;
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static int nfs_setattrrpc(struct vnode *, struct vattr *, struct ucred *,
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struct thread *);
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static vop_lookup_t nfs_lookup;
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static vop_create_t nfs_create;
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static vop_mknod_t nfs_mknod;
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static vop_open_t nfs_open;
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static vop_pathconf_t nfs_pathconf;
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static vop_close_t nfs_close;
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static vop_access_t nfs_access;
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static vop_getattr_t nfs_getattr;
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static vop_setattr_t nfs_setattr;
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static vop_read_t nfs_read;
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static vop_fsync_t nfs_fsync;
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static vop_remove_t nfs_remove;
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static vop_link_t nfs_link;
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static vop_rename_t nfs_rename;
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static vop_mkdir_t nfs_mkdir;
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static vop_rmdir_t nfs_rmdir;
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static vop_symlink_t nfs_symlink;
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static vop_readdir_t nfs_readdir;
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static vop_strategy_t nfs_strategy;
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static int nfs_lookitup(struct vnode *, char *, int,
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struct ucred *, struct thread *, struct nfsnode **);
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static int nfs_sillyrename(struct vnode *, struct vnode *,
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struct componentname *);
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static vop_access_t nfsspec_access;
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static vop_readlink_t nfs_readlink;
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static vop_print_t nfs_print;
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static vop_advlock_t nfs_advlock;
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static vop_advlockasync_t nfs_advlockasync;
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static vop_getacl_t nfs_getacl;
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static vop_setacl_t nfs_setacl;
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static vop_advise_t nfs_advise;
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static vop_allocate_t nfs_allocate;
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static vop_deallocate_t nfs_deallocate;
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static vop_copy_file_range_t nfs_copy_file_range;
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static vop_ioctl_t nfs_ioctl;
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static vop_getextattr_t nfs_getextattr;
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static vop_setextattr_t nfs_setextattr;
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static vop_listextattr_t nfs_listextattr;
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static vop_deleteextattr_t nfs_deleteextattr;
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static vop_lock1_t nfs_lock;
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/*
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* Global vfs data structures for nfs
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*/
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static struct vop_vector newnfs_vnodeops_nosig = {
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.vop_default = &default_vnodeops,
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.vop_access = nfs_access,
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.vop_advlock = nfs_advlock,
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.vop_advlockasync = nfs_advlockasync,
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.vop_close = nfs_close,
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.vop_create = nfs_create,
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.vop_fsync = nfs_fsync,
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.vop_getattr = nfs_getattr,
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.vop_getpages = ncl_getpages,
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.vop_putpages = ncl_putpages,
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.vop_inactive = ncl_inactive,
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.vop_link = nfs_link,
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.vop_lock1 = nfs_lock,
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.vop_lookup = nfs_lookup,
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.vop_mkdir = nfs_mkdir,
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.vop_mknod = nfs_mknod,
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.vop_open = nfs_open,
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.vop_pathconf = nfs_pathconf,
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.vop_print = nfs_print,
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.vop_read = nfs_read,
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.vop_readdir = nfs_readdir,
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.vop_readlink = nfs_readlink,
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.vop_reclaim = ncl_reclaim,
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.vop_remove = nfs_remove,
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.vop_rename = nfs_rename,
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.vop_rmdir = nfs_rmdir,
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.vop_setattr = nfs_setattr,
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.vop_strategy = nfs_strategy,
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.vop_symlink = nfs_symlink,
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.vop_write = ncl_write,
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.vop_getacl = nfs_getacl,
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.vop_setacl = nfs_setacl,
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.vop_advise = nfs_advise,
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.vop_allocate = nfs_allocate,
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.vop_deallocate = nfs_deallocate,
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.vop_copy_file_range = nfs_copy_file_range,
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.vop_ioctl = nfs_ioctl,
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.vop_getextattr = nfs_getextattr,
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.vop_setextattr = nfs_setextattr,
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.vop_listextattr = nfs_listextattr,
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.vop_deleteextattr = nfs_deleteextattr,
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};
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VFS_VOP_VECTOR_REGISTER(newnfs_vnodeops_nosig);
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static int
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nfs_vnodeops_bypass(struct vop_generic_args *a)
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{
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return (vop_sigdefer(&newnfs_vnodeops_nosig, a));
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}
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struct vop_vector newnfs_vnodeops = {
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.vop_default = &default_vnodeops,
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.vop_bypass = nfs_vnodeops_bypass,
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};
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VFS_VOP_VECTOR_REGISTER(newnfs_vnodeops);
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static struct vop_vector newnfs_fifoops_nosig = {
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.vop_default = &fifo_specops,
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.vop_access = nfsspec_access,
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.vop_close = nfsfifo_close,
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.vop_fsync = nfs_fsync,
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.vop_getattr = nfs_getattr,
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.vop_inactive = ncl_inactive,
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.vop_pathconf = nfs_pathconf,
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.vop_print = nfs_print,
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.vop_read = nfsfifo_read,
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.vop_reclaim = ncl_reclaim,
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.vop_setattr = nfs_setattr,
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.vop_write = nfsfifo_write,
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};
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VFS_VOP_VECTOR_REGISTER(newnfs_fifoops_nosig);
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static int
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nfs_fifoops_bypass(struct vop_generic_args *a)
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{
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return (vop_sigdefer(&newnfs_fifoops_nosig, a));
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}
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struct vop_vector newnfs_fifoops = {
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.vop_default = &default_vnodeops,
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.vop_bypass = nfs_fifoops_bypass,
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};
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VFS_VOP_VECTOR_REGISTER(newnfs_fifoops);
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static int nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp,
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struct componentname *cnp, struct vattr *vap);
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static int nfs_removerpc(struct vnode *dvp, struct vnode *vp, char *name,
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int namelen, struct ucred *cred, struct thread *td);
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static int nfs_renamerpc(struct vnode *fdvp, struct vnode *fvp,
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char *fnameptr, int fnamelen, struct vnode *tdvp, struct vnode *tvp,
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char *tnameptr, int tnamelen, struct ucred *cred, struct thread *td);
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static int nfs_renameit(struct vnode *sdvp, struct vnode *svp,
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struct componentname *scnp, struct sillyrename *sp);
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/*
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* Global variables
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*/
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SYSCTL_DECL(_vfs_nfs);
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static int nfsaccess_cache_timeout = NFS_MAXATTRTIMO;
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SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_timeout, CTLFLAG_RW,
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&nfsaccess_cache_timeout, 0, "NFS ACCESS cache timeout");
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static int nfs_prime_access_cache = 0;
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SYSCTL_INT(_vfs_nfs, OID_AUTO, prime_access_cache, CTLFLAG_RW,
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&nfs_prime_access_cache, 0,
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"Prime NFS ACCESS cache when fetching attributes");
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static int newnfs_commit_on_close = 0;
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SYSCTL_INT(_vfs_nfs, OID_AUTO, commit_on_close, CTLFLAG_RW,
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&newnfs_commit_on_close, 0, "write+commit on close, else only write");
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static int nfs_clean_pages_on_close = 1;
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SYSCTL_INT(_vfs_nfs, OID_AUTO, clean_pages_on_close, CTLFLAG_RW,
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&nfs_clean_pages_on_close, 0, "NFS clean dirty pages on close");
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int newnfs_directio_enable = 0;
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SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs_directio_enable, CTLFLAG_RW,
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&newnfs_directio_enable, 0, "Enable NFS directio");
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int nfs_keep_dirty_on_error;
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SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs_keep_dirty_on_error, CTLFLAG_RW,
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&nfs_keep_dirty_on_error, 0, "Retry pageout if error returned");
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/*
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* This sysctl allows other processes to mmap a file that has been opened
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* O_DIRECT by a process. In general, having processes mmap the file while
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* Direct IO is in progress can lead to Data Inconsistencies. But, we allow
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* this by default to prevent DoS attacks - to prevent a malicious user from
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* opening up files O_DIRECT preventing other users from mmap'ing these
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* files. "Protected" environments where stricter consistency guarantees are
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* required can disable this knob. The process that opened the file O_DIRECT
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* cannot mmap() the file, because mmap'ed IO on an O_DIRECT open() is not
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* meaningful.
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*/
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int newnfs_directio_allow_mmap = 1;
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SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs_directio_allow_mmap, CTLFLAG_RW,
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&newnfs_directio_allow_mmap, 0, "Enable mmaped IO on file with O_DIRECT opens");
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static uint64_t nfs_maxalloclen = 64 * 1024 * 1024;
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SYSCTL_U64(_vfs_nfs, OID_AUTO, maxalloclen, CTLFLAG_RW,
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&nfs_maxalloclen, 0, "NFS max allocate/deallocate length");
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#define NFSACCESS_ALL (NFSACCESS_READ | NFSACCESS_MODIFY \
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| NFSACCESS_EXTEND | NFSACCESS_EXECUTE \
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| NFSACCESS_DELETE | NFSACCESS_LOOKUP)
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/*
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* SMP Locking Note :
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* The list of locks after the description of the lock is the ordering
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* of other locks acquired with the lock held.
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* np->n_mtx : Protects the fields in the nfsnode.
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VM Object Lock
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VI_MTX (acquired indirectly)
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* nmp->nm_mtx : Protects the fields in the nfsmount.
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rep->r_mtx
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* ncl_iod_mutex : Global lock, protects shared nfsiod state.
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* nfs_reqq_mtx : Global lock, protects the nfs_reqq list.
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nmp->nm_mtx
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rep->r_mtx
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* rep->r_mtx : Protects the fields in an nfsreq.
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*/
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static int
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nfs_lock(struct vop_lock1_args *ap)
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{
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struct vnode *vp;
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struct nfsnode *np;
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u_quad_t nsize;
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int error, lktype;
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bool onfault;
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vp = ap->a_vp;
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lktype = ap->a_flags & LK_TYPE_MASK;
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error = VOP_LOCK1_APV(&default_vnodeops, ap);
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if (error != 0 || vp->v_op != &newnfs_vnodeops)
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return (error);
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np = VTONFS(vp);
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if (np == NULL)
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return (0);
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NFSLOCKNODE(np);
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if ((np->n_flag & NVNSETSZSKIP) == 0 || (lktype != LK_SHARED &&
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lktype != LK_EXCLUSIVE && lktype != LK_UPGRADE &&
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lktype != LK_TRYUPGRADE)) {
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NFSUNLOCKNODE(np);
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return (0);
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}
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onfault = (ap->a_flags & LK_EATTR_MASK) == LK_NOWAIT &&
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(ap->a_flags & LK_INIT_MASK) == LK_CANRECURSE &&
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(lktype == LK_SHARED || lktype == LK_EXCLUSIVE);
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if (onfault && vp->v_vnlock->lk_recurse == 0) {
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/*
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* Force retry in vm_fault(), to make the lock request
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* sleepable, which allows us to piggy-back the
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* sleepable call to vnode_pager_setsize().
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*/
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NFSUNLOCKNODE(np);
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VOP_UNLOCK(vp);
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return (EBUSY);
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}
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if ((ap->a_flags & LK_NOWAIT) != 0 ||
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(lktype == LK_SHARED && vp->v_vnlock->lk_recurse > 0)) {
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NFSUNLOCKNODE(np);
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return (0);
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}
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if (lktype == LK_SHARED) {
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NFSUNLOCKNODE(np);
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VOP_UNLOCK(vp);
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ap->a_flags &= ~(LK_TYPE_MASK | LK_INTERLOCK);
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ap->a_flags |= LK_EXCLUSIVE;
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error = VOP_LOCK1_APV(&default_vnodeops, ap);
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if (error != 0 || vp->v_op != &newnfs_vnodeops)
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return (error);
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if (vp->v_data == NULL)
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goto downgrade;
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MPASS(vp->v_data == np);
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NFSLOCKNODE(np);
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if ((np->n_flag & NVNSETSZSKIP) == 0) {
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NFSUNLOCKNODE(np);
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goto downgrade;
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}
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}
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np->n_flag &= ~NVNSETSZSKIP;
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nsize = np->n_size;
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NFSUNLOCKNODE(np);
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vnode_pager_setsize(vp, nsize);
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downgrade:
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if (lktype == LK_SHARED) {
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ap->a_flags &= ~(LK_TYPE_MASK | LK_INTERLOCK);
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ap->a_flags |= LK_DOWNGRADE;
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(void)VOP_LOCK1_APV(&default_vnodeops, ap);
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}
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return (0);
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}
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static int
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nfs34_access_otw(struct vnode *vp, int wmode, struct thread *td,
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struct ucred *cred, u_int32_t *retmode)
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{
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int error = 0, attrflag, i, lrupos;
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u_int32_t rmode;
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struct nfsnode *np = VTONFS(vp);
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struct nfsvattr nfsva;
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error = nfsrpc_accessrpc(vp, wmode, cred, td, &nfsva, &attrflag,
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&rmode);
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if (attrflag)
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(void) nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1);
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if (!error) {
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lrupos = 0;
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NFSLOCKNODE(np);
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for (i = 0; i < NFS_ACCESSCACHESIZE; i++) {
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if (np->n_accesscache[i].uid == cred->cr_uid) {
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np->n_accesscache[i].mode = rmode;
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np->n_accesscache[i].stamp = time_second;
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break;
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}
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if (i > 0 && np->n_accesscache[i].stamp <
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np->n_accesscache[lrupos].stamp)
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lrupos = i;
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}
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if (i == NFS_ACCESSCACHESIZE) {
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np->n_accesscache[lrupos].uid = cred->cr_uid;
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np->n_accesscache[lrupos].mode = rmode;
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|
np->n_accesscache[lrupos].stamp = time_second;
|
|
}
|
|
NFSUNLOCKNODE(np);
|
|
if (retmode != NULL)
|
|
*retmode = rmode;
|
|
KDTRACE_NFS_ACCESSCACHE_LOAD_DONE(vp, cred->cr_uid, rmode, 0);
|
|
} else if (NFS_ISV4(vp)) {
|
|
error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
|
|
}
|
|
#ifdef KDTRACE_HOOKS
|
|
if (error != 0)
|
|
KDTRACE_NFS_ACCESSCACHE_LOAD_DONE(vp, cred->cr_uid, 0,
|
|
error);
|
|
#endif
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* nfs access vnode op.
|
|
* For nfs version 2, just return ok. File accesses may fail later.
|
|
* For nfs version 3, use the access rpc to check accessibility. If file modes
|
|
* are changed on the server, accesses might still fail later.
|
|
*/
|
|
static int
|
|
nfs_access(struct vop_access_args *ap)
|
|
{
|
|
struct vnode *vp = ap->a_vp;
|
|
int error = 0, i, gotahit;
|
|
u_int32_t mode, wmode, rmode;
|
|
int v34 = NFS_ISV34(vp);
|
|
struct nfsnode *np = VTONFS(vp);
|
|
|
|
/*
|
|
* 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_accmode & (VWRITE | VAPPEND | VWRITE_NAMED_ATTRS |
|
|
VDELETE_CHILD | VWRITE_ATTRIBUTES | VDELETE | VWRITE_ACL |
|
|
VWRITE_OWNER)) != 0 && (vp->v_mount->mnt_flag & MNT_RDONLY) != 0) {
|
|
switch (vp->v_type) {
|
|
case VREG:
|
|
case VDIR:
|
|
case VLNK:
|
|
return (EROFS);
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
/*
|
|
* For nfs v3 or v4, check to see if we have done this recently, and if
|
|
* so return our cached result instead of making an ACCESS call.
|
|
* If not, do an access rpc, otherwise you are stuck emulating
|
|
* ufs_access() locally using the vattr. This may not be correct,
|
|
* since the server may apply other access criteria such as
|
|
* client uid-->server uid mapping that we do not know about.
|
|
*/
|
|
if (v34) {
|
|
if (ap->a_accmode & VREAD)
|
|
mode = NFSACCESS_READ;
|
|
else
|
|
mode = 0;
|
|
if (vp->v_type != VDIR) {
|
|
if (ap->a_accmode & VWRITE)
|
|
mode |= (NFSACCESS_MODIFY | NFSACCESS_EXTEND);
|
|
if (ap->a_accmode & VAPPEND)
|
|
mode |= NFSACCESS_EXTEND;
|
|
if (ap->a_accmode & VEXEC)
|
|
mode |= NFSACCESS_EXECUTE;
|
|
if (ap->a_accmode & VDELETE)
|
|
mode |= NFSACCESS_DELETE;
|
|
} else {
|
|
if (ap->a_accmode & VWRITE)
|
|
mode |= (NFSACCESS_MODIFY | NFSACCESS_EXTEND);
|
|
if (ap->a_accmode & VAPPEND)
|
|
mode |= NFSACCESS_EXTEND;
|
|
if (ap->a_accmode & VEXEC)
|
|
mode |= NFSACCESS_LOOKUP;
|
|
if (ap->a_accmode & VDELETE)
|
|
mode |= NFSACCESS_DELETE;
|
|
if (ap->a_accmode & VDELETE_CHILD)
|
|
mode |= NFSACCESS_MODIFY;
|
|
}
|
|
/* XXX safety belt, only make blanket request if caching */
|
|
if (nfsaccess_cache_timeout > 0) {
|
|
wmode = NFSACCESS_READ | NFSACCESS_MODIFY |
|
|
NFSACCESS_EXTEND | NFSACCESS_EXECUTE |
|
|
NFSACCESS_DELETE | NFSACCESS_LOOKUP;
|
|
} else {
|
|
wmode = mode;
|
|
}
|
|
|
|
/*
|
|
* Does our cached result allow us to give a definite yes to
|
|
* this request?
|
|
*/
|
|
gotahit = 0;
|
|
NFSLOCKNODE(np);
|
|
for (i = 0; i < NFS_ACCESSCACHESIZE; i++) {
|
|
if (ap->a_cred->cr_uid == np->n_accesscache[i].uid) {
|
|
if (time_second < (np->n_accesscache[i].stamp
|
|
+ nfsaccess_cache_timeout) &&
|
|
(np->n_accesscache[i].mode & mode) == mode) {
|
|
NFSINCRGLOBAL(nfsstatsv1.accesscache_hits);
|
|
gotahit = 1;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
NFSUNLOCKNODE(np);
|
|
#ifdef KDTRACE_HOOKS
|
|
if (gotahit != 0)
|
|
KDTRACE_NFS_ACCESSCACHE_GET_HIT(vp,
|
|
ap->a_cred->cr_uid, mode);
|
|
else
|
|
KDTRACE_NFS_ACCESSCACHE_GET_MISS(vp,
|
|
ap->a_cred->cr_uid, mode);
|
|
#endif
|
|
if (gotahit == 0) {
|
|
/*
|
|
* Either a no, or a don't know. Go to the wire.
|
|
*/
|
|
NFSINCRGLOBAL(nfsstatsv1.accesscache_misses);
|
|
error = nfs34_access_otw(vp, wmode, ap->a_td,
|
|
ap->a_cred, &rmode);
|
|
if (!error &&
|
|
(rmode & mode) != mode)
|
|
error = EACCES;
|
|
}
|
|
return (error);
|
|
} else {
|
|
if ((error = nfsspec_access(ap)) != 0) {
|
|
return (error);
|
|
}
|
|
/*
|
|
* Attempt to prevent a mapped root from accessing a file
|
|
* which it shouldn't. We try to read a byte from the file
|
|
* if the user is root and the file is not zero length.
|
|
* After calling nfsspec_access, we should have the correct
|
|
* file size cached.
|
|
*/
|
|
NFSLOCKNODE(np);
|
|
if (ap->a_cred->cr_uid == 0 && (ap->a_accmode & VREAD)
|
|
&& VTONFS(vp)->n_size > 0) {
|
|
struct iovec aiov;
|
|
struct uio auio;
|
|
char buf[1];
|
|
|
|
NFSUNLOCKNODE(np);
|
|
aiov.iov_base = buf;
|
|
aiov.iov_len = 1;
|
|
auio.uio_iov = &aiov;
|
|
auio.uio_iovcnt = 1;
|
|
auio.uio_offset = 0;
|
|
auio.uio_resid = 1;
|
|
auio.uio_segflg = UIO_SYSSPACE;
|
|
auio.uio_rw = UIO_READ;
|
|
auio.uio_td = ap->a_td;
|
|
|
|
if (vp->v_type == VREG)
|
|
error = ncl_readrpc(vp, &auio, ap->a_cred);
|
|
else if (vp->v_type == VDIR) {
|
|
char* bp;
|
|
bp = malloc(NFS_DIRBLKSIZ, M_TEMP, M_WAITOK);
|
|
aiov.iov_base = bp;
|
|
aiov.iov_len = auio.uio_resid = NFS_DIRBLKSIZ;
|
|
error = ncl_readdirrpc(vp, &auio, ap->a_cred,
|
|
ap->a_td);
|
|
free(bp, M_TEMP);
|
|
} else if (vp->v_type == VLNK)
|
|
error = ncl_readlinkrpc(vp, &auio, ap->a_cred);
|
|
else
|
|
error = EACCES;
|
|
} else
|
|
NFSUNLOCKNODE(np);
|
|
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 */
|
|
static int
|
|
nfs_open(struct vop_open_args *ap)
|
|
{
|
|
struct vnode *vp = ap->a_vp;
|
|
struct nfsnode *np = VTONFS(vp);
|
|
struct vattr vattr;
|
|
int error;
|
|
int fmode = ap->a_mode;
|
|
struct ucred *cred;
|
|
vm_object_t obj;
|
|
|
|
if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK)
|
|
return (EOPNOTSUPP);
|
|
|
|
/*
|
|
* For NFSv4, we need to do the Open Op before cache validation,
|
|
* so that we conform to RFC3530 Sec. 9.3.1.
|
|
*/
|
|
if (NFS_ISV4(vp)) {
|
|
error = nfsrpc_open(vp, fmode, ap->a_cred, ap->a_td);
|
|
if (error) {
|
|
error = nfscl_maperr(ap->a_td, error, (uid_t)0,
|
|
(gid_t)0);
|
|
return (error);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Now, if this Open will be doing reading, re-validate/flush the
|
|
* cache, so that Close/Open coherency is maintained.
|
|
*/
|
|
NFSLOCKNODE(np);
|
|
if (np->n_flag & NMODIFIED) {
|
|
NFSUNLOCKNODE(np);
|
|
if (VOP_ISLOCKED(vp) != LK_EXCLUSIVE) {
|
|
NFSVOPLOCK(vp, LK_UPGRADE | LK_RETRY);
|
|
if (VN_IS_DOOMED(vp))
|
|
return (EBADF);
|
|
}
|
|
error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
|
|
if (error == EINTR || error == EIO) {
|
|
if (NFS_ISV4(vp))
|
|
(void) nfsrpc_close(vp, 0, ap->a_td);
|
|
return (error);
|
|
}
|
|
NFSLOCKNODE(np);
|
|
np->n_attrstamp = 0;
|
|
KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
|
|
if (vp->v_type == VDIR)
|
|
np->n_direofoffset = 0;
|
|
NFSUNLOCKNODE(np);
|
|
error = VOP_GETATTR(vp, &vattr, ap->a_cred);
|
|
if (error) {
|
|
if (NFS_ISV4(vp))
|
|
(void) nfsrpc_close(vp, 0, ap->a_td);
|
|
return (error);
|
|
}
|
|
NFSLOCKNODE(np);
|
|
np->n_mtime = vattr.va_mtime;
|
|
if (NFS_ISV4(vp))
|
|
np->n_change = vattr.va_filerev;
|
|
} else {
|
|
NFSUNLOCKNODE(np);
|
|
error = VOP_GETATTR(vp, &vattr, ap->a_cred);
|
|
if (error) {
|
|
if (NFS_ISV4(vp))
|
|
(void) nfsrpc_close(vp, 0, ap->a_td);
|
|
return (error);
|
|
}
|
|
NFSLOCKNODE(np);
|
|
if ((NFS_ISV4(vp) && np->n_change != vattr.va_filerev) ||
|
|
NFS_TIMESPEC_COMPARE(&np->n_mtime, &vattr.va_mtime)) {
|
|
if (vp->v_type == VDIR)
|
|
np->n_direofoffset = 0;
|
|
NFSUNLOCKNODE(np);
|
|
if (VOP_ISLOCKED(vp) != LK_EXCLUSIVE) {
|
|
NFSVOPLOCK(vp, LK_UPGRADE | LK_RETRY);
|
|
if (VN_IS_DOOMED(vp))
|
|
return (EBADF);
|
|
}
|
|
error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
|
|
if (error == EINTR || error == EIO) {
|
|
if (NFS_ISV4(vp))
|
|
(void) nfsrpc_close(vp, 0, ap->a_td);
|
|
return (error);
|
|
}
|
|
NFSLOCKNODE(np);
|
|
np->n_mtime = vattr.va_mtime;
|
|
if (NFS_ISV4(vp))
|
|
np->n_change = vattr.va_filerev;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If the object has >= 1 O_DIRECT active opens, we disable caching.
|
|
*/
|
|
if (newnfs_directio_enable && (fmode & O_DIRECT) &&
|
|
(vp->v_type == VREG)) {
|
|
if (np->n_directio_opens == 0) {
|
|
NFSUNLOCKNODE(np);
|
|
if (VOP_ISLOCKED(vp) != LK_EXCLUSIVE) {
|
|
NFSVOPLOCK(vp, LK_UPGRADE | LK_RETRY);
|
|
if (VN_IS_DOOMED(vp))
|
|
return (EBADF);
|
|
}
|
|
error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
|
|
if (error) {
|
|
if (NFS_ISV4(vp))
|
|
(void) nfsrpc_close(vp, 0, ap->a_td);
|
|
return (error);
|
|
}
|
|
NFSLOCKNODE(np);
|
|
np->n_flag |= NNONCACHE;
|
|
}
|
|
np->n_directio_opens++;
|
|
}
|
|
|
|
/* If opened for writing via NFSv4.1 or later, mark that for pNFS. */
|
|
if (NFSHASPNFS(VFSTONFS(vp->v_mount)) && (fmode & FWRITE) != 0)
|
|
np->n_flag |= NWRITEOPENED;
|
|
|
|
/*
|
|
* If this is an open for writing, capture a reference to the
|
|
* credentials, so they can be used by ncl_putpages(). Using
|
|
* these write credentials is preferable to the credentials of
|
|
* whatever thread happens to be doing the VOP_PUTPAGES() since
|
|
* the write RPCs are less likely to fail with EACCES.
|
|
*/
|
|
if ((fmode & FWRITE) != 0) {
|
|
cred = np->n_writecred;
|
|
np->n_writecred = crhold(ap->a_cred);
|
|
} else
|
|
cred = NULL;
|
|
NFSUNLOCKNODE(np);
|
|
|
|
if (cred != NULL)
|
|
crfree(cred);
|
|
vnode_create_vobject(vp, vattr.va_size, ap->a_td);
|
|
|
|
/*
|
|
* If the text file has been mmap'd, flush any dirty pages to the
|
|
* buffer cache and then...
|
|
* Make sure all writes are pushed to the NFS server. If this is not
|
|
* done, the modify time of the file can change while the text
|
|
* file is being executed. This will cause the process that is
|
|
* executing the text file to be terminated.
|
|
*/
|
|
if (vp->v_writecount <= -1) {
|
|
if ((obj = vp->v_object) != NULL &&
|
|
vm_object_mightbedirty(obj)) {
|
|
if (VOP_ISLOCKED(vp) != LK_EXCLUSIVE) {
|
|
NFSVOPLOCK(vp, LK_UPGRADE | LK_RETRY);
|
|
if (VN_IS_DOOMED(vp))
|
|
return (EBADF);
|
|
}
|
|
VM_OBJECT_WLOCK(obj);
|
|
vm_object_page_clean(obj, 0, 0, OBJPC_SYNC);
|
|
VM_OBJECT_WUNLOCK(obj);
|
|
}
|
|
|
|
/* Now, flush the buffer cache. */
|
|
ncl_flush(vp, MNT_WAIT, curthread, 0, 0);
|
|
|
|
/* And, finally, make sure that n_mtime is up to date. */
|
|
np = VTONFS(vp);
|
|
NFSLOCKNODE(np);
|
|
np->n_mtime = np->n_vattr.na_mtime;
|
|
NFSUNLOCKNODE(np);
|
|
}
|
|
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 ncl_flush() to
|
|
* a 1 would force a commit operation, if it is felt a
|
|
* commit is necessary now.
|
|
* for NFS Version 4 - flush the dirty buffers and commit them, if
|
|
* nfscl_mustflush() says this is necessary.
|
|
* It is necessary if there is no write delegation held,
|
|
* in order to satisfy open/close coherency.
|
|
* If the file isn't cached on local stable storage,
|
|
* it may be necessary in order to detect "out of space"
|
|
* errors from the server, if the write delegation
|
|
* issued by the server doesn't allow the file to grow.
|
|
*/
|
|
/* ARGSUSED */
|
|
static int
|
|
nfs_close(struct vop_close_args *ap)
|
|
{
|
|
struct vnode *vp = ap->a_vp;
|
|
struct nfsnode *np = VTONFS(vp);
|
|
struct nfsvattr nfsva;
|
|
struct ucred *cred;
|
|
int error = 0, ret, localcred = 0;
|
|
int fmode = ap->a_fflag;
|
|
|
|
if (NFSCL_FORCEDISM(vp->v_mount))
|
|
return (0);
|
|
/*
|
|
* During shutdown, a_cred isn't valid, so just use root.
|
|
*/
|
|
if (ap->a_cred == NOCRED) {
|
|
cred = newnfs_getcred();
|
|
localcred = 1;
|
|
} else {
|
|
cred = ap->a_cred;
|
|
}
|
|
if (vp->v_type == VREG) {
|
|
/*
|
|
* Examine and clean dirty pages, regardless of NMODIFIED.
|
|
* This closes a major hole in close-to-open consistency.
|
|
* We want to push out all dirty pages (and buffers) on
|
|
* close, regardless of whether they were dirtied by
|
|
* mmap'ed writes or via write().
|
|
*/
|
|
if (nfs_clean_pages_on_close && vp->v_object) {
|
|
if (VOP_ISLOCKED(vp) != LK_EXCLUSIVE) {
|
|
NFSVOPLOCK(vp, LK_UPGRADE | LK_RETRY);
|
|
if (VN_IS_DOOMED(vp) && ap->a_fflag != FNONBLOCK)
|
|
return (EBADF);
|
|
}
|
|
VM_OBJECT_WLOCK(vp->v_object);
|
|
vm_object_page_clean(vp->v_object, 0, 0, 0);
|
|
VM_OBJECT_WUNLOCK(vp->v_object);
|
|
}
|
|
NFSLOCKNODE(np);
|
|
if (np->n_flag & NMODIFIED) {
|
|
NFSUNLOCKNODE(np);
|
|
if (NFS_ISV3(vp)) {
|
|
/*
|
|
* Under NFSv3 we have dirty buffers to dispose of. We
|
|
* must flush them to the NFS server. We have the option
|
|
* of waiting all the way through the commit rpc or just
|
|
* waiting for the initial write. The default is to only
|
|
* wait through the initial write so the data is in the
|
|
* server's cache, which is roughly similar to the state
|
|
* a standard disk subsystem leaves the file in on close().
|
|
*
|
|
* We cannot clear the NMODIFIED bit in np->n_flag due to
|
|
* potential races with other processes, and certainly
|
|
* cannot clear it if we don't commit.
|
|
* These races occur when there is no longer the old
|
|
* traditional vnode locking implemented for Vnode Ops.
|
|
*/
|
|
int cm = newnfs_commit_on_close ? 1 : 0;
|
|
if (VOP_ISLOCKED(vp) != LK_EXCLUSIVE) {
|
|
NFSVOPLOCK(vp, LK_UPGRADE | LK_RETRY);
|
|
if (VN_IS_DOOMED(vp) && ap->a_fflag != FNONBLOCK)
|
|
return (EBADF);
|
|
}
|
|
error = ncl_flush(vp, MNT_WAIT, ap->a_td, cm, 0);
|
|
/* np->n_flag &= ~NMODIFIED; */
|
|
} else if (NFS_ISV4(vp)) {
|
|
if (nfscl_mustflush(vp) != 0) {
|
|
int cm = newnfs_commit_on_close ? 1 : 0;
|
|
if (VOP_ISLOCKED(vp) != LK_EXCLUSIVE) {
|
|
NFSVOPLOCK(vp, LK_UPGRADE | LK_RETRY);
|
|
if (VN_IS_DOOMED(vp) && ap->a_fflag !=
|
|
FNONBLOCK)
|
|
return (EBADF);
|
|
}
|
|
error = ncl_flush(vp, MNT_WAIT, ap->a_td,
|
|
cm, 0);
|
|
/*
|
|
* as above w.r.t races when clearing
|
|
* NMODIFIED.
|
|
* np->n_flag &= ~NMODIFIED;
|
|
*/
|
|
}
|
|
} else {
|
|
if (VOP_ISLOCKED(vp) != LK_EXCLUSIVE) {
|
|
NFSVOPLOCK(vp, LK_UPGRADE | LK_RETRY);
|
|
if (VN_IS_DOOMED(vp) && ap->a_fflag !=
|
|
FNONBLOCK)
|
|
return (EBADF);
|
|
}
|
|
error = ncl_vinvalbuf(vp, V_SAVE, ap->a_td, 1);
|
|
}
|
|
NFSLOCKNODE(np);
|
|
}
|
|
/*
|
|
* Invalidate the attribute cache in all cases.
|
|
* An open is going to fetch fresh attrs any way, other procs
|
|
* on this node that have file open will be forced to do an
|
|
* otw attr fetch, but this is safe.
|
|
* --> A user found that their RPC count dropped by 20% when
|
|
* this was commented out and I can't see any requirement
|
|
* for it, so I've disabled it when negative lookups are
|
|
* enabled. (What does this have to do with negative lookup
|
|
* caching? Well nothing, except it was reported by the
|
|
* same user that needed negative lookup caching and I wanted
|
|
* there to be a way to disable it to see if it
|
|
* is the cause of some caching/coherency issue that might
|
|
* crop up.)
|
|
*/
|
|
if (VFSTONFS(vp->v_mount)->nm_negnametimeo == 0) {
|
|
np->n_attrstamp = 0;
|
|
KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
|
|
}
|
|
if (np->n_flag & NWRITEERR) {
|
|
np->n_flag &= ~NWRITEERR;
|
|
error = np->n_error;
|
|
}
|
|
NFSUNLOCKNODE(np);
|
|
}
|
|
|
|
if (NFS_ISV4(vp)) {
|
|
/*
|
|
* Get attributes so "change" is up to date.
|
|
*/
|
|
if (error == 0 && nfscl_mustflush(vp) != 0 &&
|
|
vp->v_type == VREG &&
|
|
(VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NOCTO) == 0) {
|
|
ret = nfsrpc_getattr(vp, cred, ap->a_td, &nfsva);
|
|
if (!ret) {
|
|
np->n_change = nfsva.na_filerev;
|
|
(void) nfscl_loadattrcache(&vp, &nfsva, NULL,
|
|
0, 0);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* and do the close.
|
|
*/
|
|
ret = nfsrpc_close(vp, 0, ap->a_td);
|
|
if (!error && ret)
|
|
error = ret;
|
|
if (error)
|
|
error = nfscl_maperr(ap->a_td, error, (uid_t)0,
|
|
(gid_t)0);
|
|
}
|
|
if (newnfs_directio_enable)
|
|
KASSERT((np->n_directio_asyncwr == 0),
|
|
("nfs_close: dirty unflushed (%d) directio buffers\n",
|
|
np->n_directio_asyncwr));
|
|
if (newnfs_directio_enable && (fmode & O_DIRECT) && (vp->v_type == VREG)) {
|
|
NFSLOCKNODE(np);
|
|
KASSERT((np->n_directio_opens > 0),
|
|
("nfs_close: unexpectedly value (0) of n_directio_opens\n"));
|
|
np->n_directio_opens--;
|
|
if (np->n_directio_opens == 0)
|
|
np->n_flag &= ~NNONCACHE;
|
|
NFSUNLOCKNODE(np);
|
|
}
|
|
if (localcred)
|
|
NFSFREECRED(cred);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* nfs getattr call from vfs.
|
|
*/
|
|
static int
|
|
nfs_getattr(struct vop_getattr_args *ap)
|
|
{
|
|
struct vnode *vp = ap->a_vp;
|
|
struct thread *td = curthread; /* XXX */
|
|
struct nfsnode *np = VTONFS(vp);
|
|
int error = 0;
|
|
struct nfsvattr nfsva;
|
|
struct vattr *vap = ap->a_vap;
|
|
struct vattr vattr;
|
|
struct nfsmount *nmp;
|
|
|
|
nmp = VFSTONFS(vp->v_mount);
|
|
/*
|
|
* Update local times for special files.
|
|
*/
|
|
NFSLOCKNODE(np);
|
|
if (np->n_flag & (NACC | NUPD))
|
|
np->n_flag |= NCHG;
|
|
NFSUNLOCKNODE(np);
|
|
/*
|
|
* First look in the cache.
|
|
* For "syskrb5" mounts, nm_fhsize might still be zero and
|
|
* cached attributes should be ignored.
|
|
*/
|
|
if (nmp->nm_fhsize > 0 && ncl_getattrcache(vp, &vattr) == 0) {
|
|
ncl_copy_vattr(vap, &vattr);
|
|
|
|
/*
|
|
* Get the local modify time for the case of a write
|
|
* delegation.
|
|
*/
|
|
nfscl_deleggetmodtime(vp, &vap->va_mtime);
|
|
return (0);
|
|
}
|
|
|
|
if (NFS_ISV34(vp) && nfs_prime_access_cache &&
|
|
nfsaccess_cache_timeout > 0) {
|
|
NFSINCRGLOBAL(nfsstatsv1.accesscache_misses);
|
|
nfs34_access_otw(vp, NFSACCESS_ALL, td, ap->a_cred, NULL);
|
|
if (ncl_getattrcache(vp, ap->a_vap) == 0) {
|
|
nfscl_deleggetmodtime(vp, &ap->a_vap->va_mtime);
|
|
return (0);
|
|
}
|
|
}
|
|
error = nfsrpc_getattr(vp, ap->a_cred, td, &nfsva);
|
|
if (!error)
|
|
error = nfscl_loadattrcache(&vp, &nfsva, vap, 0, 0);
|
|
if (!error) {
|
|
/*
|
|
* Get the local modify time for the case of a write
|
|
* delegation.
|
|
*/
|
|
nfscl_deleggetmodtime(vp, &vap->va_mtime);
|
|
} else if (NFS_ISV4(vp)) {
|
|
error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* nfs setattr call.
|
|
*/
|
|
static int
|
|
nfs_setattr(struct vop_setattr_args *ap)
|
|
{
|
|
struct vnode *vp = ap->a_vp;
|
|
struct nfsnode *np = VTONFS(vp);
|
|
struct thread *td = curthread; /* XXX */
|
|
struct vattr *vap = ap->a_vap;
|
|
int error = 0;
|
|
u_quad_t tsize;
|
|
struct timespec ts;
|
|
|
|
#ifndef nolint
|
|
tsize = (u_quad_t)0;
|
|
#endif
|
|
|
|
/*
|
|
* Setting of flags and marking of atimes are not supported.
|
|
*/
|
|
if (vap->va_flags != VNOVAL)
|
|
return (EOPNOTSUPP);
|
|
|
|
/*
|
|
* Disallow write attempts if the filesystem is mounted read-only.
|
|
*/
|
|
if ((vap->va_flags != VNOVAL || 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_birthtime.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_birthtime.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);
|
|
/*
|
|
* We run vnode_pager_setsize() early (why?),
|
|
* we must set np->n_size now to avoid vinvalbuf
|
|
* V_SAVE races that might setsize a lower
|
|
* value.
|
|
*/
|
|
NFSLOCKNODE(np);
|
|
tsize = np->n_size;
|
|
NFSUNLOCKNODE(np);
|
|
error = ncl_meta_setsize(vp, td, vap->va_size);
|
|
NFSLOCKNODE(np);
|
|
if (np->n_flag & NMODIFIED) {
|
|
tsize = np->n_size;
|
|
NFSUNLOCKNODE(np);
|
|
error = ncl_vinvalbuf(vp, vap->va_size == 0 ?
|
|
0 : V_SAVE, td, 1);
|
|
if (error != 0) {
|
|
vnode_pager_setsize(vp, tsize);
|
|
return (error);
|
|
}
|
|
/*
|
|
* Call nfscl_delegmodtime() to set the modify time
|
|
* locally, as required.
|
|
*/
|
|
nfscl_delegmodtime(vp);
|
|
} else
|
|
NFSUNLOCKNODE(np);
|
|
/*
|
|
* np->n_size has already been set to vap->va_size
|
|
* in ncl_meta_setsize(). We must set it again since
|
|
* nfs_loadattrcache() could be called through
|
|
* ncl_meta_setsize() and could modify np->n_size.
|
|
*/
|
|
NFSLOCKNODE(np);
|
|
np->n_vattr.na_size = np->n_size = vap->va_size;
|
|
NFSUNLOCKNODE(np);
|
|
}
|
|
} else {
|
|
NFSLOCKNODE(np);
|
|
if ((vap->va_mtime.tv_sec != VNOVAL || vap->va_atime.tv_sec != VNOVAL) &&
|
|
(np->n_flag & NMODIFIED) && vp->v_type == VREG) {
|
|
NFSUNLOCKNODE(np);
|
|
error = ncl_vinvalbuf(vp, V_SAVE, td, 1);
|
|
if (error == EINTR || error == EIO)
|
|
return (error);
|
|
} else
|
|
NFSUNLOCKNODE(np);
|
|
}
|
|
error = nfs_setattrrpc(vp, vap, ap->a_cred, td);
|
|
if (vap->va_size != VNOVAL) {
|
|
if (error == 0) {
|
|
nanouptime(&ts);
|
|
NFSLOCKNODE(np);
|
|
np->n_localmodtime = ts;
|
|
NFSUNLOCKNODE(np);
|
|
} else {
|
|
NFSLOCKNODE(np);
|
|
np->n_size = np->n_vattr.na_size = tsize;
|
|
vnode_pager_setsize(vp, tsize);
|
|
NFSUNLOCKNODE(np);
|
|
}
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Do an nfs setattr rpc.
|
|
*/
|
|
static int
|
|
nfs_setattrrpc(struct vnode *vp, struct vattr *vap, struct ucred *cred,
|
|
struct thread *td)
|
|
{
|
|
struct nfsnode *np = VTONFS(vp);
|
|
int error, ret, attrflag, i;
|
|
struct nfsvattr nfsva;
|
|
|
|
if (NFS_ISV34(vp)) {
|
|
NFSLOCKNODE(np);
|
|
for (i = 0; i < NFS_ACCESSCACHESIZE; i++)
|
|
np->n_accesscache[i].stamp = 0;
|
|
np->n_flag |= NDELEGMOD;
|
|
NFSUNLOCKNODE(np);
|
|
KDTRACE_NFS_ACCESSCACHE_FLUSH_DONE(vp);
|
|
}
|
|
error = nfsrpc_setattr(vp, vap, NULL, cred, td, &nfsva, &attrflag);
|
|
if (attrflag) {
|
|
ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1);
|
|
if (ret && !error)
|
|
error = ret;
|
|
}
|
|
if (error && NFS_ISV4(vp))
|
|
error = nfscl_maperr(td, error, vap->va_uid, vap->va_gid);
|
|
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
|
|
*/
|
|
static int
|
|
nfs_lookup(struct vop_lookup_args *ap)
|
|
{
|
|
struct componentname *cnp = ap->a_cnp;
|
|
struct vnode *dvp = ap->a_dvp;
|
|
struct vnode **vpp = ap->a_vpp;
|
|
struct mount *mp = dvp->v_mount;
|
|
int flags = cnp->cn_flags;
|
|
struct vnode *newvp;
|
|
struct nfsmount *nmp;
|
|
struct nfsnode *np, *newnp;
|
|
int error = 0, attrflag, dattrflag, ltype, ncticks;
|
|
struct thread *td = curthread;
|
|
struct nfsfh *nfhp;
|
|
struct nfsvattr dnfsva, nfsva;
|
|
struct vattr vattr;
|
|
struct timespec nctime, ts;
|
|
uint32_t openmode;
|
|
|
|
*vpp = NULLVP;
|
|
if ((flags & ISLASTCN) && (mp->mnt_flag & MNT_RDONLY) &&
|
|
(cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME))
|
|
return (EROFS);
|
|
if (dvp->v_type != VDIR)
|
|
return (ENOTDIR);
|
|
nmp = VFSTONFS(mp);
|
|
np = VTONFS(dvp);
|
|
|
|
/* For NFSv4, wait until any remove is done. */
|
|
NFSLOCKNODE(np);
|
|
while (NFSHASNFSV4(nmp) && (np->n_flag & NREMOVEINPROG)) {
|
|
np->n_flag |= NREMOVEWANT;
|
|
(void) msleep((caddr_t)np, &np->n_mtx, PZERO, "nfslkup", 0);
|
|
}
|
|
NFSUNLOCKNODE(np);
|
|
|
|
error = vn_dir_check_exec(dvp, cnp);
|
|
if (error != 0)
|
|
return (error);
|
|
error = cache_lookup(dvp, vpp, cnp, &nctime, &ncticks);
|
|
if (error > 0 && error != ENOENT)
|
|
return (error);
|
|
if (error == -1) {
|
|
/*
|
|
* Lookups of "." are special and always return the
|
|
* current directory. cache_lookup() already handles
|
|
* associated locking bookkeeping, etc.
|
|
*/
|
|
if (cnp->cn_namelen == 1 && cnp->cn_nameptr[0] == '.') {
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* We only accept a positive hit in the cache if the
|
|
* change time of the file matches our cached copy.
|
|
* Otherwise, we discard the cache entry and fallback
|
|
* to doing a lookup RPC. We also only trust cache
|
|
* entries for less than nm_nametimeo seconds.
|
|
*
|
|
* To better handle stale file handles and attributes,
|
|
* clear the attribute cache of this node if it is a
|
|
* leaf component, part of an open() call, and not
|
|
* locally modified before fetching the attributes.
|
|
* This should allow stale file handles to be detected
|
|
* here where we can fall back to a LOOKUP RPC to
|
|
* recover rather than having nfs_open() detect the
|
|
* stale file handle and failing open(2) with ESTALE.
|
|
*/
|
|
newvp = *vpp;
|
|
newnp = VTONFS(newvp);
|
|
if (!(nmp->nm_flag & NFSMNT_NOCTO) &&
|
|
(flags & (ISLASTCN | ISOPEN)) == (ISLASTCN | ISOPEN) &&
|
|
!(newnp->n_flag & NMODIFIED)) {
|
|
NFSLOCKNODE(newnp);
|
|
newnp->n_attrstamp = 0;
|
|
KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(newvp);
|
|
NFSUNLOCKNODE(newnp);
|
|
}
|
|
if (nfscl_nodeleg(newvp, 0) == 0 ||
|
|
((u_int)(ticks - ncticks) < (nmp->nm_nametimeo * hz) &&
|
|
VOP_GETATTR(newvp, &vattr, cnp->cn_cred) == 0 &&
|
|
timespeccmp(&vattr.va_ctime, &nctime, ==))) {
|
|
NFSINCRGLOBAL(nfsstatsv1.lookupcache_hits);
|
|
return (0);
|
|
}
|
|
cache_purge(newvp);
|
|
if (dvp != newvp)
|
|
vput(newvp);
|
|
else
|
|
vrele(newvp);
|
|
*vpp = NULLVP;
|
|
} else if (error == ENOENT) {
|
|
if (VN_IS_DOOMED(dvp))
|
|
return (ENOENT);
|
|
/*
|
|
* We only accept a negative hit in the cache if the
|
|
* modification time of the parent directory matches
|
|
* the cached copy in the name cache entry.
|
|
* Otherwise, we discard all of the negative cache
|
|
* entries for this directory. We also only trust
|
|
* negative cache entries for up to nm_negnametimeo
|
|
* seconds.
|
|
*/
|
|
if ((u_int)(ticks - ncticks) < (nmp->nm_negnametimeo * hz) &&
|
|
VOP_GETATTR(dvp, &vattr, cnp->cn_cred) == 0 &&
|
|
timespeccmp(&vattr.va_mtime, &nctime, ==)) {
|
|
NFSINCRGLOBAL(nfsstatsv1.lookupcache_hits);
|
|
return (ENOENT);
|
|
}
|
|
cache_purge_negative(dvp);
|
|
}
|
|
|
|
openmode = 0;
|
|
/*
|
|
* If this an NFSv4.1/4.2 mount using the "oneopenown" mount
|
|
* option, it is possible to do the Open operation in the same
|
|
* compound as Lookup, so long as delegations are not being
|
|
* issued. This saves doing a separate RPC for Open.
|
|
* For pnfs, do not do this, since the Open+LayoutGet will
|
|
* be needed as a separate RPC.
|
|
*/
|
|
NFSLOCKMNT(nmp);
|
|
if (NFSHASNFSV4N(nmp) && NFSHASONEOPENOWN(nmp) && !NFSHASPNFS(nmp) &&
|
|
(nmp->nm_privflag & NFSMNTP_DELEGISSUED) == 0 &&
|
|
(!NFSMNT_RDONLY(mp) || (flags & OPENWRITE) == 0) &&
|
|
(flags & (ISLASTCN | ISOPEN)) == (ISLASTCN | ISOPEN)) {
|
|
if ((flags & OPENREAD) != 0)
|
|
openmode |= NFSV4OPEN_ACCESSREAD;
|
|
if ((flags & OPENWRITE) != 0)
|
|
openmode |= NFSV4OPEN_ACCESSWRITE;
|
|
}
|
|
NFSUNLOCKMNT(nmp);
|
|
|
|
newvp = NULLVP;
|
|
NFSINCRGLOBAL(nfsstatsv1.lookupcache_misses);
|
|
nanouptime(&ts);
|
|
error = nfsrpc_lookup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
|
|
cnp->cn_cred, td, &dnfsva, &nfsva, &nfhp, &attrflag, &dattrflag,
|
|
openmode);
|
|
if (dattrflag)
|
|
(void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, 0, 1);
|
|
if (error) {
|
|
if (newvp != NULLVP) {
|
|
vput(newvp);
|
|
*vpp = NULLVP;
|
|
}
|
|
|
|
if (error != ENOENT) {
|
|
if (NFS_ISV4(dvp))
|
|
error = nfscl_maperr(td, error, (uid_t)0,
|
|
(gid_t)0);
|
|
return (error);
|
|
}
|
|
|
|
/* The requested file was not found. */
|
|
if ((cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME) &&
|
|
(flags & ISLASTCN)) {
|
|
/*
|
|
* XXX: UFS does a full VOP_ACCESS(dvp,
|
|
* VWRITE) here instead of just checking
|
|
* MNT_RDONLY.
|
|
*/
|
|
if (mp->mnt_flag & MNT_RDONLY)
|
|
return (EROFS);
|
|
return (EJUSTRETURN);
|
|
}
|
|
|
|
if ((cnp->cn_flags & MAKEENTRY) != 0 && dattrflag) {
|
|
/*
|
|
* Cache the modification time of the parent
|
|
* directory from the post-op attributes in
|
|
* the name cache entry. The negative cache
|
|
* entry will be ignored once the directory
|
|
* has changed. Don't bother adding the entry
|
|
* if the directory has already changed.
|
|
*/
|
|
NFSLOCKNODE(np);
|
|
if (timespeccmp(&np->n_vattr.na_mtime,
|
|
&dnfsva.na_mtime, ==)) {
|
|
NFSUNLOCKNODE(np);
|
|
cache_enter_time(dvp, NULL, cnp,
|
|
&dnfsva.na_mtime, NULL);
|
|
} else
|
|
NFSUNLOCKNODE(np);
|
|
}
|
|
return (ENOENT);
|
|
}
|
|
|
|
/*
|
|
* Handle RENAME case...
|
|
*/
|
|
if (cnp->cn_nameiop == RENAME && (flags & ISLASTCN)) {
|
|
if (NFS_CMPFH(np, nfhp->nfh_fh, nfhp->nfh_len)) {
|
|
free(nfhp, M_NFSFH);
|
|
return (EISDIR);
|
|
}
|
|
error = nfscl_nget(mp, dvp, nfhp, cnp, td, &np, LK_EXCLUSIVE);
|
|
if (error)
|
|
return (error);
|
|
newvp = NFSTOV(np);
|
|
/*
|
|
* If n_localmodtime >= time before RPC, then
|
|
* a file modification operation, such as
|
|
* VOP_SETATTR() of size, has occurred while
|
|
* the Lookup RPC and acquisition of the vnode
|
|
* happened. As such, the attributes might
|
|
* be stale, with possibly an incorrect size.
|
|
*/
|
|
NFSLOCKNODE(np);
|
|
if (timespecisset(&np->n_localmodtime) &&
|
|
timespeccmp(&np->n_localmodtime, &ts, >=)) {
|
|
NFSCL_DEBUG(4, "nfs_lookup: rename localmod "
|
|
"stale attributes\n");
|
|
attrflag = 0;
|
|
}
|
|
NFSUNLOCKNODE(np);
|
|
if (attrflag)
|
|
(void) nfscl_loadattrcache(&newvp, &nfsva, NULL, 0, 1);
|
|
*vpp = newvp;
|
|
return (0);
|
|
}
|
|
|
|
if (flags & ISDOTDOT) {
|
|
ltype = NFSVOPISLOCKED(dvp);
|
|
error = vfs_busy(mp, MBF_NOWAIT);
|
|
if (error != 0) {
|
|
vfs_ref(mp);
|
|
NFSVOPUNLOCK(dvp);
|
|
error = vfs_busy(mp, 0);
|
|
NFSVOPLOCK(dvp, ltype | LK_RETRY);
|
|
vfs_rel(mp);
|
|
if (error == 0 && VN_IS_DOOMED(dvp)) {
|
|
vfs_unbusy(mp);
|
|
error = ENOENT;
|
|
}
|
|
if (error != 0)
|
|
return (error);
|
|
}
|
|
NFSVOPUNLOCK(dvp);
|
|
error = nfscl_nget(mp, dvp, nfhp, cnp, td, &np,
|
|
cnp->cn_lkflags);
|
|
if (error == 0)
|
|
newvp = NFSTOV(np);
|
|
vfs_unbusy(mp);
|
|
if (newvp != dvp)
|
|
NFSVOPLOCK(dvp, ltype | LK_RETRY);
|
|
if (VN_IS_DOOMED(dvp)) {
|
|
if (error == 0) {
|
|
if (newvp == dvp)
|
|
vrele(newvp);
|
|
else
|
|
vput(newvp);
|
|
}
|
|
error = ENOENT;
|
|
}
|
|
if (error != 0)
|
|
return (error);
|
|
if (attrflag)
|
|
(void) nfscl_loadattrcache(&newvp, &nfsva, NULL, 0, 1);
|
|
} else if (NFS_CMPFH(np, nfhp->nfh_fh, nfhp->nfh_len)) {
|
|
free(nfhp, M_NFSFH);
|
|
VREF(dvp);
|
|
newvp = dvp;
|
|
if (attrflag)
|
|
(void) nfscl_loadattrcache(&newvp, &nfsva, NULL, 0, 1);
|
|
} else {
|
|
error = nfscl_nget(mp, dvp, nfhp, cnp, td, &np,
|
|
cnp->cn_lkflags);
|
|
if (error)
|
|
return (error);
|
|
newvp = NFSTOV(np);
|
|
/*
|
|
* If n_localmodtime >= time before RPC, then
|
|
* a file modification operation, such as
|
|
* VOP_SETATTR() of size, has occurred while
|
|
* the Lookup RPC and acquisition of the vnode
|
|
* happened. As such, the attributes might
|
|
* be stale, with possibly an incorrect size.
|
|
*/
|
|
NFSLOCKNODE(np);
|
|
if (timespecisset(&np->n_localmodtime) &&
|
|
timespeccmp(&np->n_localmodtime, &ts, >=)) {
|
|
NFSCL_DEBUG(4, "nfs_lookup: localmod "
|
|
"stale attributes\n");
|
|
attrflag = 0;
|
|
}
|
|
NFSUNLOCKNODE(np);
|
|
if (attrflag)
|
|
(void) nfscl_loadattrcache(&newvp, &nfsva, NULL, 0, 1);
|
|
else if ((flags & (ISLASTCN | ISOPEN)) == (ISLASTCN | ISOPEN) &&
|
|
!(np->n_flag & NMODIFIED)) {
|
|
/*
|
|
* Flush the attribute cache when opening a
|
|
* leaf node to ensure that fresh attributes
|
|
* are fetched in nfs_open() since we did not
|
|
* fetch attributes from the LOOKUP reply.
|
|
*/
|
|
NFSLOCKNODE(np);
|
|
np->n_attrstamp = 0;
|
|
KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(newvp);
|
|
NFSUNLOCKNODE(np);
|
|
}
|
|
}
|
|
if ((cnp->cn_flags & MAKEENTRY) && dvp != newvp &&
|
|
(cnp->cn_nameiop != DELETE || !(flags & ISLASTCN)) &&
|
|
attrflag != 0 && (newvp->v_type != VDIR || dattrflag != 0))
|
|
cache_enter_time(dvp, newvp, cnp, &nfsva.na_ctime,
|
|
newvp->v_type != VDIR ? NULL : &dnfsva.na_ctime);
|
|
*vpp = newvp;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* nfs read call.
|
|
* Just call ncl_bioread() to do the work.
|
|
*/
|
|
static int
|
|
nfs_read(struct vop_read_args *ap)
|
|
{
|
|
struct vnode *vp = ap->a_vp;
|
|
|
|
switch (vp->v_type) {
|
|
case VREG:
|
|
return (ncl_bioread(vp, ap->a_uio, ap->a_ioflag, ap->a_cred));
|
|
case VDIR:
|
|
return (EISDIR);
|
|
default:
|
|
return (EOPNOTSUPP);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* nfs readlink call
|
|
*/
|
|
static int
|
|
nfs_readlink(struct vop_readlink_args *ap)
|
|
{
|
|
struct vnode *vp = ap->a_vp;
|
|
|
|
if (vp->v_type != VLNK)
|
|
return (EINVAL);
|
|
return (ncl_bioread(vp, ap->a_uio, 0, ap->a_cred));
|
|
}
|
|
|
|
/*
|
|
* Do a readlink rpc.
|
|
* Called by ncl_doio() from below the buffer cache.
|
|
*/
|
|
int
|
|
ncl_readlinkrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred)
|
|
{
|
|
int error, ret, attrflag;
|
|
struct nfsvattr nfsva;
|
|
|
|
error = nfsrpc_readlink(vp, uiop, cred, uiop->uio_td, &nfsva,
|
|
&attrflag);
|
|
if (attrflag) {
|
|
ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1);
|
|
if (ret && !error)
|
|
error = ret;
|
|
}
|
|
if (error && NFS_ISV4(vp))
|
|
error = nfscl_maperr(uiop->uio_td, error, (uid_t)0, (gid_t)0);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* nfs read rpc call
|
|
* Ditto above
|
|
*/
|
|
int
|
|
ncl_readrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred)
|
|
{
|
|
int error, ret, attrflag;
|
|
struct nfsvattr nfsva;
|
|
struct nfsmount *nmp;
|
|
|
|
nmp = VFSTONFS(vp->v_mount);
|
|
error = EIO;
|
|
attrflag = 0;
|
|
if (NFSHASPNFS(nmp))
|
|
error = nfscl_doiods(vp, uiop, NULL, NULL,
|
|
NFSV4OPEN_ACCESSREAD, 0, cred, uiop->uio_td);
|
|
NFSCL_DEBUG(4, "readrpc: aft doiods=%d\n", error);
|
|
if (error != 0)
|
|
error = nfsrpc_read(vp, uiop, cred, uiop->uio_td, &nfsva,
|
|
&attrflag);
|
|
if (attrflag) {
|
|
ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1);
|
|
if (ret && !error)
|
|
error = ret;
|
|
}
|
|
if (error && NFS_ISV4(vp))
|
|
error = nfscl_maperr(uiop->uio_td, error, (uid_t)0, (gid_t)0);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* nfs write call
|
|
*/
|
|
int
|
|
ncl_writerpc(struct vnode *vp, struct uio *uiop, struct ucred *cred,
|
|
int *iomode, int *must_commit, int called_from_strategy, int ioflag)
|
|
{
|
|
struct nfsvattr nfsva;
|
|
int error, attrflag, ret;
|
|
struct nfsmount *nmp;
|
|
|
|
nmp = VFSTONFS(vp->v_mount);
|
|
error = EIO;
|
|
attrflag = 0;
|
|
if (NFSHASPNFS(nmp))
|
|
error = nfscl_doiods(vp, uiop, iomode, must_commit,
|
|
NFSV4OPEN_ACCESSWRITE, 0, cred, uiop->uio_td);
|
|
NFSCL_DEBUG(4, "writerpc: aft doiods=%d\n", error);
|
|
if (error != 0)
|
|
error = nfsrpc_write(vp, uiop, iomode, must_commit, cred,
|
|
uiop->uio_td, &nfsva, &attrflag, called_from_strategy,
|
|
ioflag);
|
|
if (attrflag) {
|
|
if (VTONFS(vp)->n_flag & ND_NFSV4)
|
|
ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 1, 1);
|
|
else
|
|
ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1);
|
|
if (ret && !error)
|
|
error = ret;
|
|
}
|
|
if (DOINGASYNC(vp))
|
|
*iomode = NFSWRITE_FILESYNC;
|
|
if (error && NFS_ISV4(vp))
|
|
error = nfscl_maperr(uiop->uio_td, error, (uid_t)0, (gid_t)0);
|
|
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.
|
|
*/
|
|
static int
|
|
nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp,
|
|
struct vattr *vap)
|
|
{
|
|
struct nfsvattr nfsva, dnfsva;
|
|
struct vnode *newvp = NULL;
|
|
struct nfsnode *np = NULL, *dnp;
|
|
struct nfsfh *nfhp;
|
|
struct vattr vattr;
|
|
int error = 0, attrflag, dattrflag;
|
|
u_int32_t rdev;
|
|
|
|
if (vap->va_type == VCHR || vap->va_type == VBLK)
|
|
rdev = vap->va_rdev;
|
|
else if (vap->va_type == VFIFO || vap->va_type == VSOCK)
|
|
rdev = 0xffffffff;
|
|
else
|
|
return (EOPNOTSUPP);
|
|
if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred)))
|
|
return (error);
|
|
error = nfsrpc_mknod(dvp, cnp->cn_nameptr, cnp->cn_namelen, vap,
|
|
rdev, vap->va_type, cnp->cn_cred, curthread, &dnfsva,
|
|
&nfsva, &nfhp, &attrflag, &dattrflag);
|
|
if (!error) {
|
|
if (!nfhp)
|
|
(void) nfsrpc_lookup(dvp, cnp->cn_nameptr,
|
|
cnp->cn_namelen, cnp->cn_cred, curthread,
|
|
&dnfsva, &nfsva, &nfhp, &attrflag, &dattrflag, 0);
|
|
if (nfhp)
|
|
error = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp,
|
|
curthread, &np, LK_EXCLUSIVE);
|
|
}
|
|
if (dattrflag)
|
|
(void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, 0, 1);
|
|
if (!error) {
|
|
newvp = NFSTOV(np);
|
|
if (attrflag != 0) {
|
|
error = nfscl_loadattrcache(&newvp, &nfsva, NULL, 0, 1);
|
|
if (error != 0)
|
|
vput(newvp);
|
|
}
|
|
}
|
|
if (!error) {
|
|
*vpp = newvp;
|
|
} else if (NFS_ISV4(dvp)) {
|
|
error = nfscl_maperr(curthread, error, vap->va_uid,
|
|
vap->va_gid);
|
|
}
|
|
dnp = VTONFS(dvp);
|
|
NFSLOCKNODE(dnp);
|
|
dnp->n_flag |= NMODIFIED;
|
|
if (!dattrflag) {
|
|
dnp->n_attrstamp = 0;
|
|
KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
|
|
}
|
|
NFSUNLOCKNODE(dnp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* nfs mknod vop
|
|
* just call nfs_mknodrpc() to do the work.
|
|
*/
|
|
/* ARGSUSED */
|
|
static int
|
|
nfs_mknod(struct vop_mknod_args *ap)
|
|
{
|
|
return (nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap));
|
|
}
|
|
|
|
static struct mtx nfs_cverf_mtx;
|
|
MTX_SYSINIT(nfs_cverf_mtx, &nfs_cverf_mtx, "NFS create verifier mutex",
|
|
MTX_DEF);
|
|
|
|
static nfsquad_t
|
|
nfs_get_cverf(void)
|
|
{
|
|
static nfsquad_t cverf;
|
|
nfsquad_t ret;
|
|
static int cverf_initialized = 0;
|
|
|
|
mtx_lock(&nfs_cverf_mtx);
|
|
if (cverf_initialized == 0) {
|
|
cverf.lval[0] = arc4random();
|
|
cverf.lval[1] = arc4random();
|
|
cverf_initialized = 1;
|
|
} else
|
|
cverf.qval++;
|
|
ret = cverf;
|
|
mtx_unlock(&nfs_cverf_mtx);
|
|
|
|
return (ret);
|
|
}
|
|
|
|
/*
|
|
* nfs file create call
|
|
*/
|
|
static int
|
|
nfs_create(struct vop_create_args *ap)
|
|
{
|
|
struct vnode *dvp = ap->a_dvp;
|
|
struct vattr *vap = ap->a_vap;
|
|
struct componentname *cnp = ap->a_cnp;
|
|
struct nfsnode *np = NULL, *dnp;
|
|
struct vnode *newvp = NULL;
|
|
struct nfsmount *nmp;
|
|
struct nfsvattr dnfsva, nfsva;
|
|
struct nfsfh *nfhp;
|
|
nfsquad_t cverf;
|
|
int error = 0, attrflag, dattrflag, fmode = 0;
|
|
struct vattr vattr;
|
|
|
|
/*
|
|
* Oops, not for me..
|
|
*/
|
|
if (vap->va_type == VSOCK)
|
|
return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap));
|
|
|
|
if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred)))
|
|
return (error);
|
|
if (vap->va_vaflags & VA_EXCLUSIVE)
|
|
fmode |= O_EXCL;
|
|
dnp = VTONFS(dvp);
|
|
nmp = VFSTONFS(dvp->v_mount);
|
|
again:
|
|
/* For NFSv4, wait until any remove is done. */
|
|
NFSLOCKNODE(dnp);
|
|
while (NFSHASNFSV4(nmp) && (dnp->n_flag & NREMOVEINPROG)) {
|
|
dnp->n_flag |= NREMOVEWANT;
|
|
(void) msleep((caddr_t)dnp, &dnp->n_mtx, PZERO, "nfscrt", 0);
|
|
}
|
|
NFSUNLOCKNODE(dnp);
|
|
|
|
cverf = nfs_get_cverf();
|
|
error = nfsrpc_create(dvp, cnp->cn_nameptr, cnp->cn_namelen,
|
|
vap, cverf, fmode, cnp->cn_cred, curthread, &dnfsva, &nfsva,
|
|
&nfhp, &attrflag, &dattrflag);
|
|
if (!error) {
|
|
if (nfhp == NULL)
|
|
(void) nfsrpc_lookup(dvp, cnp->cn_nameptr,
|
|
cnp->cn_namelen, cnp->cn_cred, curthread,
|
|
&dnfsva, &nfsva, &nfhp, &attrflag, &dattrflag, 0);
|
|
if (nfhp != NULL)
|
|
error = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp,
|
|
curthread, &np, LK_EXCLUSIVE);
|
|
}
|
|
if (dattrflag)
|
|
(void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, 0, 1);
|
|
if (!error) {
|
|
newvp = NFSTOV(np);
|
|
if (attrflag == 0)
|
|
error = nfsrpc_getattr(newvp, cnp->cn_cred, curthread,
|
|
&nfsva);
|
|
if (error == 0)
|
|
error = nfscl_loadattrcache(&newvp, &nfsva, NULL, 0, 1);
|
|
}
|
|
if (error) {
|
|
if (newvp != NULL) {
|
|
vput(newvp);
|
|
newvp = NULL;
|
|
}
|
|
if (NFS_ISV34(dvp) && (fmode & O_EXCL) &&
|
|
error == NFSERR_NOTSUPP) {
|
|
fmode &= ~O_EXCL;
|
|
goto again;
|
|
}
|
|
} else if (NFS_ISV34(dvp) && (fmode & O_EXCL)) {
|
|
if (nfscl_checksattr(vap, &nfsva)) {
|
|
error = nfsrpc_setattr(newvp, vap, NULL, cnp->cn_cred,
|
|
curthread, &nfsva, &attrflag);
|
|
if (error && (vap->va_uid != (uid_t)VNOVAL ||
|
|
vap->va_gid != (gid_t)VNOVAL)) {
|
|
/* try again without setting uid/gid */
|
|
vap->va_uid = (uid_t)VNOVAL;
|
|
vap->va_gid = (uid_t)VNOVAL;
|
|
error = nfsrpc_setattr(newvp, vap, NULL,
|
|
cnp->cn_cred, curthread, &nfsva, &attrflag);
|
|
}
|
|
if (attrflag)
|
|
(void) nfscl_loadattrcache(&newvp, &nfsva, NULL,
|
|
0, 1);
|
|
if (error != 0)
|
|
vput(newvp);
|
|
}
|
|
}
|
|
if (!error) {
|
|
if ((cnp->cn_flags & MAKEENTRY) && attrflag) {
|
|
if (dvp != newvp)
|
|
cache_enter_time(dvp, newvp, cnp,
|
|
&nfsva.na_ctime, NULL);
|
|
else
|
|
printf("nfs_create: bogus NFS server returned "
|
|
"the directory as the new file object\n");
|
|
}
|
|
*ap->a_vpp = newvp;
|
|
} else if (NFS_ISV4(dvp)) {
|
|
error = nfscl_maperr(curthread, error, vap->va_uid,
|
|
vap->va_gid);
|
|
}
|
|
NFSLOCKNODE(dnp);
|
|
dnp->n_flag |= NMODIFIED;
|
|
if (!dattrflag) {
|
|
dnp->n_attrstamp = 0;
|
|
KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
|
|
}
|
|
NFSUNLOCKNODE(dnp);
|
|
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
|
|
*/
|
|
static int
|
|
nfs_remove(struct vop_remove_args *ap)
|
|
{
|
|
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;
|
|
|
|
KASSERT(vrefcnt(vp) > 0, ("nfs_remove: bad v_usecount"));
|
|
if (vp->v_type == VDIR)
|
|
error = EPERM;
|
|
else if (vrefcnt(vp) == 1 || (np->n_sillyrename &&
|
|
VOP_GETATTR(vp, &vattr, cnp->cn_cred) == 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 = ncl_vinvalbuf(vp, 0, curthread, 1);
|
|
if (error != EINTR && error != EIO)
|
|
/* Do the rpc */
|
|
error = nfs_removerpc(dvp, vp, cnp->cn_nameptr,
|
|
cnp->cn_namelen, cnp->cn_cred, curthread);
|
|
/*
|
|
* 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);
|
|
NFSLOCKNODE(np);
|
|
np->n_attrstamp = 0;
|
|
NFSUNLOCKNODE(np);
|
|
KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* nfs file remove rpc called from nfs_inactive
|
|
*/
|
|
int
|
|
ncl_removeit(struct sillyrename *sp, struct vnode *vp)
|
|
{
|
|
/*
|
|
* Make sure that the directory vnode is still valid.
|
|
* XXX we should lock sp->s_dvp here.
|
|
*/
|
|
if (sp->s_dvp->v_type == VBAD)
|
|
return (0);
|
|
return (nfs_removerpc(sp->s_dvp, vp, sp->s_name, sp->s_namlen,
|
|
sp->s_cred, NULL));
|
|
}
|
|
|
|
/*
|
|
* Nfs remove rpc, called from nfs_remove() and ncl_removeit().
|
|
*/
|
|
static int
|
|
nfs_removerpc(struct vnode *dvp, struct vnode *vp, char *name,
|
|
int namelen, struct ucred *cred, struct thread *td)
|
|
{
|
|
struct nfsvattr dnfsva;
|
|
struct nfsnode *dnp = VTONFS(dvp);
|
|
int error = 0, dattrflag;
|
|
|
|
NFSLOCKNODE(dnp);
|
|
dnp->n_flag |= NREMOVEINPROG;
|
|
NFSUNLOCKNODE(dnp);
|
|
error = nfsrpc_remove(dvp, name, namelen, vp, cred, td, &dnfsva,
|
|
&dattrflag);
|
|
NFSLOCKNODE(dnp);
|
|
if ((dnp->n_flag & NREMOVEWANT)) {
|
|
dnp->n_flag &= ~(NREMOVEWANT | NREMOVEINPROG);
|
|
NFSUNLOCKNODE(dnp);
|
|
wakeup((caddr_t)dnp);
|
|
} else {
|
|
dnp->n_flag &= ~NREMOVEINPROG;
|
|
NFSUNLOCKNODE(dnp);
|
|
}
|
|
if (dattrflag)
|
|
(void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, 0, 1);
|
|
NFSLOCKNODE(dnp);
|
|
dnp->n_flag |= NMODIFIED;
|
|
if (!dattrflag) {
|
|
dnp->n_attrstamp = 0;
|
|
KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
|
|
}
|
|
NFSUNLOCKNODE(dnp);
|
|
if (error && NFS_ISV4(dvp))
|
|
error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* nfs file rename call
|
|
*/
|
|
static int
|
|
nfs_rename(struct vop_rename_args *ap)
|
|
{
|
|
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;
|
|
struct nfsnode *fnp = VTONFS(ap->a_fvp);
|
|
struct nfsnode *tdnp = VTONFS(ap->a_tdvp);
|
|
struct nfsv4node *newv4 = NULL;
|
|
int error;
|
|
|
|
/* Check for cross-device rename */
|
|
if ((fvp->v_mount != tdvp->v_mount) ||
|
|
(tvp && (fvp->v_mount != tvp->v_mount))) {
|
|
error = EXDEV;
|
|
goto out;
|
|
}
|
|
|
|
if (fvp == tvp) {
|
|
printf("nfs_rename: fvp == tvp (can't happen)\n");
|
|
error = 0;
|
|
goto out;
|
|
}
|
|
if ((error = NFSVOPLOCK(fvp, LK_EXCLUSIVE)) != 0)
|
|
goto out;
|
|
|
|
/*
|
|
* We have to flush B_DELWRI data prior to renaming
|
|
* the file. If we don't, the delayed-write buffers
|
|
* can be flushed out later after the file has gone stale
|
|
* under NFSV3. NFSV2 does not have this problem because
|
|
* ( as far as I can tell ) it flushes dirty buffers more
|
|
* often.
|
|
*
|
|
* Skip the rename operation if the fsync fails, this can happen
|
|
* due to the server's volume being full, when we pushed out data
|
|
* that was written back to our cache earlier. Not checking for
|
|
* this condition can result in potential (silent) data loss.
|
|
*/
|
|
error = VOP_FSYNC(fvp, MNT_WAIT, curthread);
|
|
NFSVOPUNLOCK(fvp);
|
|
if (!error && tvp)
|
|
error = VOP_FSYNC(tvp, MNT_WAIT, curthread);
|
|
if (error)
|
|
goto out;
|
|
|
|
/*
|
|
* If the tvp exists and is in use, sillyrename it before doing the
|
|
* rename of the new file over it.
|
|
* XXX Can't sillyrename a directory.
|
|
*/
|
|
if (tvp && vrefcnt(tvp) > 1 && !VTONFS(tvp)->n_sillyrename &&
|
|
tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) {
|
|
vput(tvp);
|
|
tvp = NULL;
|
|
}
|
|
|
|
error = nfs_renamerpc(fdvp, fvp, fcnp->cn_nameptr, fcnp->cn_namelen,
|
|
tdvp, tvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred,
|
|
curthread);
|
|
|
|
if (error == 0 && NFS_ISV4(tdvp)) {
|
|
/*
|
|
* For NFSv4, check to see if it is the same name and
|
|
* replace the name, if it is different.
|
|
*/
|
|
newv4 = malloc(
|
|
sizeof (struct nfsv4node) +
|
|
tdnp->n_fhp->nfh_len + tcnp->cn_namelen - 1,
|
|
M_NFSV4NODE, M_WAITOK);
|
|
NFSLOCKNODE(tdnp);
|
|
NFSLOCKNODE(fnp);
|
|
if (fnp->n_v4 != NULL && fvp->v_type == VREG &&
|
|
(fnp->n_v4->n4_namelen != tcnp->cn_namelen ||
|
|
NFSBCMP(tcnp->cn_nameptr, NFS4NODENAME(fnp->n_v4),
|
|
tcnp->cn_namelen) ||
|
|
tdnp->n_fhp->nfh_len != fnp->n_v4->n4_fhlen ||
|
|
NFSBCMP(tdnp->n_fhp->nfh_fh, fnp->n_v4->n4_data,
|
|
tdnp->n_fhp->nfh_len))) {
|
|
#ifdef notdef
|
|
{ char nnn[100]; int nnnl;
|
|
nnnl = (tcnp->cn_namelen < 100) ? tcnp->cn_namelen : 99;
|
|
bcopy(tcnp->cn_nameptr, nnn, nnnl);
|
|
nnn[nnnl] = '\0';
|
|
printf("ren replace=%s\n",nnn);
|
|
}
|
|
#endif
|
|
free(fnp->n_v4, M_NFSV4NODE);
|
|
fnp->n_v4 = newv4;
|
|
newv4 = NULL;
|
|
fnp->n_v4->n4_fhlen = tdnp->n_fhp->nfh_len;
|
|
fnp->n_v4->n4_namelen = tcnp->cn_namelen;
|
|
NFSBCOPY(tdnp->n_fhp->nfh_fh, fnp->n_v4->n4_data,
|
|
tdnp->n_fhp->nfh_len);
|
|
NFSBCOPY(tcnp->cn_nameptr,
|
|
NFS4NODENAME(fnp->n_v4), tcnp->cn_namelen);
|
|
}
|
|
NFSUNLOCKNODE(tdnp);
|
|
NFSUNLOCKNODE(fnp);
|
|
if (newv4 != NULL)
|
|
free(newv4, M_NFSV4NODE);
|
|
}
|
|
|
|
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
|
|
*/
|
|
static int
|
|
nfs_renameit(struct vnode *sdvp, struct vnode *svp, struct componentname *scnp,
|
|
struct sillyrename *sp)
|
|
{
|
|
|
|
return (nfs_renamerpc(sdvp, svp, scnp->cn_nameptr, scnp->cn_namelen,
|
|
sdvp, NULL, sp->s_name, sp->s_namlen, scnp->cn_cred,
|
|
curthread));
|
|
}
|
|
|
|
/*
|
|
* Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit().
|
|
*/
|
|
static int
|
|
nfs_renamerpc(struct vnode *fdvp, struct vnode *fvp, char *fnameptr,
|
|
int fnamelen, struct vnode *tdvp, struct vnode *tvp, char *tnameptr,
|
|
int tnamelen, struct ucred *cred, struct thread *td)
|
|
{
|
|
struct nfsvattr fnfsva, tnfsva;
|
|
struct nfsnode *fdnp = VTONFS(fdvp);
|
|
struct nfsnode *tdnp = VTONFS(tdvp);
|
|
int error = 0, fattrflag, tattrflag;
|
|
|
|
error = nfsrpc_rename(fdvp, fvp, fnameptr, fnamelen, tdvp, tvp,
|
|
tnameptr, tnamelen, cred, td, &fnfsva, &tnfsva, &fattrflag,
|
|
&tattrflag);
|
|
NFSLOCKNODE(fdnp);
|
|
fdnp->n_flag |= NMODIFIED;
|
|
if (fattrflag != 0) {
|
|
NFSUNLOCKNODE(fdnp);
|
|
(void) nfscl_loadattrcache(&fdvp, &fnfsva, NULL, 0, 1);
|
|
} else {
|
|
fdnp->n_attrstamp = 0;
|
|
NFSUNLOCKNODE(fdnp);
|
|
KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(fdvp);
|
|
}
|
|
NFSLOCKNODE(tdnp);
|
|
tdnp->n_flag |= NMODIFIED;
|
|
if (tattrflag != 0) {
|
|
NFSUNLOCKNODE(tdnp);
|
|
(void) nfscl_loadattrcache(&tdvp, &tnfsva, NULL, 0, 1);
|
|
} else {
|
|
tdnp->n_attrstamp = 0;
|
|
NFSUNLOCKNODE(tdnp);
|
|
KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(tdvp);
|
|
}
|
|
if (error && NFS_ISV4(fdvp))
|
|
error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* nfs hard link create call
|
|
*/
|
|
static int
|
|
nfs_link(struct vop_link_args *ap)
|
|
{
|
|
struct vnode *vp = ap->a_vp;
|
|
struct vnode *tdvp = ap->a_tdvp;
|
|
struct componentname *cnp = ap->a_cnp;
|
|
struct nfsnode *np, *tdnp;
|
|
struct nfsvattr nfsva, dnfsva;
|
|
int error = 0, attrflag, dattrflag;
|
|
|
|
/*
|
|
* 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, MNT_WAIT, curthread);
|
|
|
|
error = nfsrpc_link(tdvp, vp, cnp->cn_nameptr, cnp->cn_namelen,
|
|
cnp->cn_cred, curthread, &dnfsva, &nfsva, &attrflag, &dattrflag);
|
|
tdnp = VTONFS(tdvp);
|
|
NFSLOCKNODE(tdnp);
|
|
tdnp->n_flag |= NMODIFIED;
|
|
if (dattrflag != 0) {
|
|
NFSUNLOCKNODE(tdnp);
|
|
(void) nfscl_loadattrcache(&tdvp, &dnfsva, NULL, 0, 1);
|
|
} else {
|
|
tdnp->n_attrstamp = 0;
|
|
NFSUNLOCKNODE(tdnp);
|
|
KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(tdvp);
|
|
}
|
|
if (attrflag)
|
|
(void) nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1);
|
|
else {
|
|
np = VTONFS(vp);
|
|
NFSLOCKNODE(np);
|
|
np->n_attrstamp = 0;
|
|
NFSUNLOCKNODE(np);
|
|
KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
|
|
}
|
|
/*
|
|
* If negative lookup caching is enabled, I might as well
|
|
* add an entry for this node. Not necessary for correctness,
|
|
* but if negative caching is enabled, then the system
|
|
* must care about lookup caching hit rate, so...
|
|
*/
|
|
if (VFSTONFS(vp->v_mount)->nm_negnametimeo != 0 &&
|
|
(cnp->cn_flags & MAKEENTRY) && attrflag != 0 && error == 0) {
|
|
if (tdvp != vp)
|
|
cache_enter_time(tdvp, vp, cnp, &nfsva.na_ctime, NULL);
|
|
else
|
|
printf("nfs_link: bogus NFS server returned "
|
|
"the directory as the new link\n");
|
|
}
|
|
if (error && NFS_ISV4(vp))
|
|
error = nfscl_maperr(curthread, error, (uid_t)0,
|
|
(gid_t)0);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* nfs symbolic link create call
|
|
*/
|
|
static int
|
|
nfs_symlink(struct vop_symlink_args *ap)
|
|
{
|
|
struct vnode *dvp = ap->a_dvp;
|
|
struct vattr *vap = ap->a_vap;
|
|
struct componentname *cnp = ap->a_cnp;
|
|
struct nfsvattr nfsva, dnfsva;
|
|
struct nfsfh *nfhp;
|
|
struct nfsnode *np = NULL, *dnp;
|
|
struct vnode *newvp = NULL;
|
|
int error = 0, attrflag, dattrflag, ret;
|
|
|
|
vap->va_type = VLNK;
|
|
error = nfsrpc_symlink(dvp, cnp->cn_nameptr, cnp->cn_namelen,
|
|
ap->a_target, vap, cnp->cn_cred, curthread, &dnfsva,
|
|
&nfsva, &nfhp, &attrflag, &dattrflag);
|
|
if (nfhp) {
|
|
ret = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp, curthread,
|
|
&np, LK_EXCLUSIVE);
|
|
if (!ret)
|
|
newvp = NFSTOV(np);
|
|
else if (!error)
|
|
error = ret;
|
|
}
|
|
if (newvp != NULL) {
|
|
if (attrflag)
|
|
(void) nfscl_loadattrcache(&newvp, &nfsva, NULL, 0, 1);
|
|
} else if (!error) {
|
|
/*
|
|
* If we do not have an error and we could not extract the
|
|
* newvp from the response due to the request being NFSv2, we
|
|
* have to do a lookup in order to obtain a newvp to return.
|
|
*/
|
|
error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
|
|
cnp->cn_cred, curthread, &np);
|
|
if (!error)
|
|
newvp = NFSTOV(np);
|
|
}
|
|
if (error) {
|
|
if (newvp)
|
|
vput(newvp);
|
|
if (NFS_ISV4(dvp))
|
|
error = nfscl_maperr(curthread, error,
|
|
vap->va_uid, vap->va_gid);
|
|
} else {
|
|
*ap->a_vpp = newvp;
|
|
}
|
|
|
|
dnp = VTONFS(dvp);
|
|
NFSLOCKNODE(dnp);
|
|
dnp->n_flag |= NMODIFIED;
|
|
if (dattrflag != 0) {
|
|
NFSUNLOCKNODE(dnp);
|
|
(void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, 0, 1);
|
|
} else {
|
|
dnp->n_attrstamp = 0;
|
|
NFSUNLOCKNODE(dnp);
|
|
KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
|
|
}
|
|
/*
|
|
* If negative lookup caching is enabled, I might as well
|
|
* add an entry for this node. Not necessary for correctness,
|
|
* but if negative caching is enabled, then the system
|
|
* must care about lookup caching hit rate, so...
|
|
*/
|
|
if (VFSTONFS(dvp->v_mount)->nm_negnametimeo != 0 &&
|
|
(cnp->cn_flags & MAKEENTRY) && attrflag != 0 && error == 0) {
|
|
if (dvp != newvp)
|
|
cache_enter_time(dvp, newvp, cnp, &nfsva.na_ctime,
|
|
NULL);
|
|
else
|
|
printf("nfs_symlink: bogus NFS server returned "
|
|
"the directory as the new file object\n");
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* nfs make dir call
|
|
*/
|
|
static int
|
|
nfs_mkdir(struct vop_mkdir_args *ap)
|
|
{
|
|
struct vnode *dvp = ap->a_dvp;
|
|
struct vattr *vap = ap->a_vap;
|
|
struct componentname *cnp = ap->a_cnp;
|
|
struct nfsnode *np = NULL, *dnp;
|
|
struct vnode *newvp = NULL;
|
|
struct vattr vattr;
|
|
struct nfsfh *nfhp;
|
|
struct nfsvattr nfsva, dnfsva;
|
|
int error = 0, attrflag, dattrflag, ret;
|
|
|
|
if ((error = VOP_GETATTR(dvp, &vattr, cnp->cn_cred)) != 0)
|
|
return (error);
|
|
vap->va_type = VDIR;
|
|
error = nfsrpc_mkdir(dvp, cnp->cn_nameptr, cnp->cn_namelen,
|
|
vap, cnp->cn_cred, curthread, &dnfsva, &nfsva, &nfhp,
|
|
&attrflag, &dattrflag);
|
|
dnp = VTONFS(dvp);
|
|
NFSLOCKNODE(dnp);
|
|
dnp->n_flag |= NMODIFIED;
|
|
if (dattrflag != 0) {
|
|
NFSUNLOCKNODE(dnp);
|
|
(void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, 0, 1);
|
|
} else {
|
|
dnp->n_attrstamp = 0;
|
|
NFSUNLOCKNODE(dnp);
|
|
KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
|
|
}
|
|
if (nfhp) {
|
|
ret = nfscl_nget(dvp->v_mount, dvp, nfhp, cnp, curthread,
|
|
&np, LK_EXCLUSIVE);
|
|
if (!ret) {
|
|
newvp = NFSTOV(np);
|
|
if (attrflag)
|
|
(void) nfscl_loadattrcache(&newvp, &nfsva, NULL,
|
|
0, 1);
|
|
} else if (!error)
|
|
error = ret;
|
|
}
|
|
if (!error && newvp == NULL) {
|
|
error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen,
|
|
cnp->cn_cred, curthread, &np);
|
|
if (!error) {
|
|
newvp = NFSTOV(np);
|
|
if (newvp->v_type != VDIR)
|
|
error = EEXIST;
|
|
}
|
|
}
|
|
if (error) {
|
|
if (newvp)
|
|
vput(newvp);
|
|
if (NFS_ISV4(dvp))
|
|
error = nfscl_maperr(curthread, error,
|
|
vap->va_uid, vap->va_gid);
|
|
} else {
|
|
/*
|
|
* If negative lookup caching is enabled, I might as well
|
|
* add an entry for this node. Not necessary for correctness,
|
|
* but if negative caching is enabled, then the system
|
|
* must care about lookup caching hit rate, so...
|
|
*/
|
|
if (VFSTONFS(dvp->v_mount)->nm_negnametimeo != 0 &&
|
|
(cnp->cn_flags & MAKEENTRY) &&
|
|
attrflag != 0 && dattrflag != 0) {
|
|
if (dvp != newvp)
|
|
cache_enter_time(dvp, newvp, cnp,
|
|
&nfsva.na_ctime, &dnfsva.na_ctime);
|
|
else
|
|
printf("nfs_mkdir: bogus NFS server returned "
|
|
"the directory that the directory was "
|
|
"created in as the new file object\n");
|
|
}
|
|
*ap->a_vpp = newvp;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* nfs remove directory call
|
|
*/
|
|
static int
|
|
nfs_rmdir(struct vop_rmdir_args *ap)
|
|
{
|
|
struct vnode *vp = ap->a_vp;
|
|
struct vnode *dvp = ap->a_dvp;
|
|
struct componentname *cnp = ap->a_cnp;
|
|
struct nfsnode *dnp;
|
|
struct nfsvattr dnfsva;
|
|
int error, dattrflag;
|
|
|
|
if (dvp == vp)
|
|
return (EINVAL);
|
|
error = nfsrpc_rmdir(dvp, cnp->cn_nameptr, cnp->cn_namelen,
|
|
cnp->cn_cred, curthread, &dnfsva, &dattrflag);
|
|
dnp = VTONFS(dvp);
|
|
NFSLOCKNODE(dnp);
|
|
dnp->n_flag |= NMODIFIED;
|
|
if (dattrflag != 0) {
|
|
NFSUNLOCKNODE(dnp);
|
|
(void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, 0, 1);
|
|
} else {
|
|
dnp->n_attrstamp = 0;
|
|
NFSUNLOCKNODE(dnp);
|
|
KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(dvp);
|
|
}
|
|
|
|
cache_purge(dvp);
|
|
cache_purge(vp);
|
|
if (error && NFS_ISV4(dvp))
|
|
error = nfscl_maperr(curthread, error, (uid_t)0,
|
|
(gid_t)0);
|
|
/*
|
|
* Kludge: Map ENOENT => 0 assuming that you have a reply to a retry.
|
|
*/
|
|
if (error == ENOENT)
|
|
error = 0;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* nfs readdir call
|
|
*/
|
|
static int
|
|
nfs_readdir(struct vop_readdir_args *ap)
|
|
{
|
|
struct vnode *vp = ap->a_vp;
|
|
struct nfsnode *np = VTONFS(vp);
|
|
struct uio *uio = ap->a_uio;
|
|
ssize_t tresid, left;
|
|
int error = 0;
|
|
struct vattr vattr;
|
|
|
|
if (ap->a_eofflag != NULL)
|
|
*ap->a_eofflag = 0;
|
|
if (vp->v_type != VDIR)
|
|
return(EPERM);
|
|
|
|
/*
|
|
* First, check for hit on the EOF offset cache
|
|
*/
|
|
NFSLOCKNODE(np);
|
|
if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset &&
|
|
(np->n_flag & NMODIFIED) == 0) {
|
|
NFSUNLOCKNODE(np);
|
|
if (VOP_GETATTR(vp, &vattr, ap->a_cred) == 0) {
|
|
NFSLOCKNODE(np);
|
|
if ((NFS_ISV4(vp) && np->n_change == vattr.va_filerev) ||
|
|
!NFS_TIMESPEC_COMPARE(&np->n_mtime, &vattr.va_mtime)) {
|
|
NFSUNLOCKNODE(np);
|
|
NFSINCRGLOBAL(nfsstatsv1.direofcache_hits);
|
|
if (ap->a_eofflag != NULL)
|
|
*ap->a_eofflag = 1;
|
|
return (0);
|
|
} else
|
|
NFSUNLOCKNODE(np);
|
|
}
|
|
} else
|
|
NFSUNLOCKNODE(np);
|
|
|
|
/*
|
|
* NFS always guarantees that directory entries don't straddle
|
|
* DIRBLKSIZ boundaries. As such, we need to limit the size
|
|
* to an exact multiple of DIRBLKSIZ, to avoid copying a partial
|
|
* directory entry.
|
|
*/
|
|
left = uio->uio_resid % DIRBLKSIZ;
|
|
if (left == uio->uio_resid)
|
|
return (EINVAL);
|
|
uio->uio_resid -= left;
|
|
|
|
/*
|
|
* Call ncl_bioread() to do the real work.
|
|
*/
|
|
tresid = uio->uio_resid;
|
|
error = ncl_bioread(vp, uio, 0, ap->a_cred);
|
|
|
|
if (!error && uio->uio_resid == tresid) {
|
|
NFSINCRGLOBAL(nfsstatsv1.direofcache_misses);
|
|
if (ap->a_eofflag != NULL)
|
|
*ap->a_eofflag = 1;
|
|
}
|
|
|
|
/* Add the partial DIRBLKSIZ (left) back in. */
|
|
uio->uio_resid += left;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Readdir rpc call.
|
|
* Called from below the buffer cache by ncl_doio().
|
|
*/
|
|
int
|
|
ncl_readdirrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred,
|
|
struct thread *td)
|
|
{
|
|
struct nfsvattr nfsva;
|
|
nfsuint64 *cookiep, cookie;
|
|
struct nfsnode *dnp = VTONFS(vp);
|
|
struct nfsmount *nmp = VFSTONFS(vp->v_mount);
|
|
int error = 0, eof, attrflag;
|
|
|
|
KASSERT(uiop->uio_iovcnt == 1 &&
|
|
(uiop->uio_offset & (DIRBLKSIZ - 1)) == 0 &&
|
|
(uiop->uio_resid & (DIRBLKSIZ - 1)) == 0,
|
|
("nfs readdirrpc bad uio"));
|
|
|
|
/*
|
|
* If there is no cookie, assume directory was stale.
|
|
*/
|
|
ncl_dircookie_lock(dnp);
|
|
NFSUNLOCKNODE(dnp);
|
|
cookiep = ncl_getcookie(dnp, uiop->uio_offset, 0);
|
|
if (cookiep) {
|
|
cookie = *cookiep;
|
|
ncl_dircookie_unlock(dnp);
|
|
} else {
|
|
ncl_dircookie_unlock(dnp);
|
|
return (NFSERR_BAD_COOKIE);
|
|
}
|
|
|
|
if (NFSHASNFSV3(nmp) && !NFSHASGOTFSINFO(nmp))
|
|
(void)ncl_fsinfo(nmp, vp, cred, td);
|
|
|
|
error = nfsrpc_readdir(vp, uiop, &cookie, cred, td, &nfsva,
|
|
&attrflag, &eof);
|
|
if (attrflag)
|
|
(void) nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1);
|
|
|
|
if (!error) {
|
|
/*
|
|
* We are now either at the end of the directory or have filled
|
|
* the block.
|
|
*/
|
|
if (eof) {
|
|
NFSLOCKNODE(dnp);
|
|
dnp->n_direofoffset = uiop->uio_offset;
|
|
NFSUNLOCKNODE(dnp);
|
|
} else {
|
|
if (uiop->uio_resid > 0)
|
|
printf("EEK! readdirrpc resid > 0\n");
|
|
ncl_dircookie_lock(dnp);
|
|
NFSUNLOCKNODE(dnp);
|
|
cookiep = ncl_getcookie(dnp, uiop->uio_offset, 1);
|
|
*cookiep = cookie;
|
|
ncl_dircookie_unlock(dnp);
|
|
}
|
|
} else if (NFS_ISV4(vp)) {
|
|
error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* NFS V3 readdir plus RPC. Used in place of ncl_readdirrpc().
|
|
*/
|
|
int
|
|
ncl_readdirplusrpc(struct vnode *vp, struct uio *uiop, struct ucred *cred,
|
|
struct thread *td)
|
|
{
|
|
struct nfsvattr nfsva;
|
|
nfsuint64 *cookiep, cookie;
|
|
struct nfsnode *dnp = VTONFS(vp);
|
|
struct nfsmount *nmp = VFSTONFS(vp->v_mount);
|
|
int error = 0, attrflag, eof;
|
|
|
|
KASSERT(uiop->uio_iovcnt == 1 &&
|
|
(uiop->uio_offset & (DIRBLKSIZ - 1)) == 0 &&
|
|
(uiop->uio_resid & (DIRBLKSIZ - 1)) == 0,
|
|
("nfs readdirplusrpc bad uio"));
|
|
|
|
/*
|
|
* If there is no cookie, assume directory was stale.
|
|
*/
|
|
ncl_dircookie_lock(dnp);
|
|
NFSUNLOCKNODE(dnp);
|
|
cookiep = ncl_getcookie(dnp, uiop->uio_offset, 0);
|
|
if (cookiep) {
|
|
cookie = *cookiep;
|
|
ncl_dircookie_unlock(dnp);
|
|
} else {
|
|
ncl_dircookie_unlock(dnp);
|
|
return (NFSERR_BAD_COOKIE);
|
|
}
|
|
|
|
if (NFSHASNFSV3(nmp) && !NFSHASGOTFSINFO(nmp))
|
|
(void)ncl_fsinfo(nmp, vp, cred, td);
|
|
error = nfsrpc_readdirplus(vp, uiop, &cookie, cred, td, &nfsva,
|
|
&attrflag, &eof);
|
|
if (attrflag)
|
|
(void) nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1);
|
|
|
|
if (!error) {
|
|
/*
|
|
* We are now either at end of the directory or have filled the
|
|
* the block.
|
|
*/
|
|
if (eof) {
|
|
NFSLOCKNODE(dnp);
|
|
dnp->n_direofoffset = uiop->uio_offset;
|
|
NFSUNLOCKNODE(dnp);
|
|
} else {
|
|
if (uiop->uio_resid > 0)
|
|
printf("EEK! readdirplusrpc resid > 0\n");
|
|
ncl_dircookie_lock(dnp);
|
|
NFSUNLOCKNODE(dnp);
|
|
cookiep = ncl_getcookie(dnp, uiop->uio_offset, 1);
|
|
*cookiep = cookie;
|
|
ncl_dircookie_unlock(dnp);
|
|
}
|
|
} else if (NFS_ISV4(vp)) {
|
|
error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* 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...
|
|
*/
|
|
static int
|
|
nfs_sillyrename(struct vnode *dvp, struct vnode *vp, struct componentname *cnp)
|
|
{
|
|
struct sillyrename *sp;
|
|
struct nfsnode *np;
|
|
int error;
|
|
short pid;
|
|
unsigned int lticks;
|
|
|
|
cache_purge(dvp);
|
|
np = VTONFS(vp);
|
|
KASSERT(vp->v_type != VDIR, ("nfs: sillyrename dir"));
|
|
sp = malloc(sizeof (struct sillyrename),
|
|
M_NEWNFSREQ, M_WAITOK);
|
|
sp->s_cred = crhold(cnp->cn_cred);
|
|
sp->s_dvp = dvp;
|
|
VREF(dvp);
|
|
|
|
/*
|
|
* Fudge together a funny name.
|
|
* Changing the format of the funny name to accommodate more
|
|
* sillynames per directory.
|
|
* The name is now changed to .nfs.<ticks>.<pid>.4, where ticks is
|
|
* CPU ticks since boot.
|
|
*/
|
|
pid = curthread->td_proc->p_pid;
|
|
lticks = (unsigned int)ticks;
|
|
for ( ; ; ) {
|
|
sp->s_namlen = sprintf(sp->s_name,
|
|
".nfs.%08x.%04x4.4", lticks,
|
|
pid);
|
|
if (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
|
|
curthread, NULL))
|
|
break;
|
|
lticks++;
|
|
}
|
|
error = nfs_renameit(dvp, vp, cnp, sp);
|
|
if (error)
|
|
goto bad;
|
|
error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred,
|
|
curthread, &np);
|
|
np->n_sillyrename = sp;
|
|
return (0);
|
|
bad:
|
|
vrele(sp->s_dvp);
|
|
crfree(sp->s_cred);
|
|
free(sp, M_NEWNFSREQ);
|
|
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
|
|
*/
|
|
static int
|
|
nfs_lookitup(struct vnode *dvp, char *name, int len, struct ucred *cred,
|
|
struct thread *td, struct nfsnode **npp)
|
|
{
|
|
struct vnode *newvp = NULL, *vp;
|
|
struct nfsnode *np, *dnp = VTONFS(dvp);
|
|
struct nfsfh *nfhp, *onfhp;
|
|
struct nfsvattr nfsva, dnfsva;
|
|
struct componentname cn;
|
|
int error = 0, attrflag, dattrflag;
|
|
u_int hash;
|
|
struct timespec ts;
|
|
|
|
nanouptime(&ts);
|
|
error = nfsrpc_lookup(dvp, name, len, cred, td, &dnfsva, &nfsva,
|
|
&nfhp, &attrflag, &dattrflag, 0);
|
|
if (dattrflag)
|
|
(void) nfscl_loadattrcache(&dvp, &dnfsva, NULL, 0, 1);
|
|
if (npp && !error) {
|
|
if (*npp != NULL) {
|
|
np = *npp;
|
|
vp = NFSTOV(np);
|
|
/*
|
|
* For NFSv4, check to see if it is the same name and
|
|
* replace the name, if it is different.
|
|
*/
|
|
if (np->n_v4 != NULL && nfsva.na_type == VREG &&
|
|
(np->n_v4->n4_namelen != len ||
|
|
NFSBCMP(name, NFS4NODENAME(np->n_v4), len) ||
|
|
dnp->n_fhp->nfh_len != np->n_v4->n4_fhlen ||
|
|
NFSBCMP(dnp->n_fhp->nfh_fh, np->n_v4->n4_data,
|
|
dnp->n_fhp->nfh_len))) {
|
|
#ifdef notdef
|
|
{ char nnn[100]; int nnnl;
|
|
nnnl = (len < 100) ? len : 99;
|
|
bcopy(name, nnn, nnnl);
|
|
nnn[nnnl] = '\0';
|
|
printf("replace=%s\n",nnn);
|
|
}
|
|
#endif
|
|
free(np->n_v4, M_NFSV4NODE);
|
|
np->n_v4 = malloc(
|
|
sizeof (struct nfsv4node) +
|
|
dnp->n_fhp->nfh_len + len - 1,
|
|
M_NFSV4NODE, M_WAITOK);
|
|
np->n_v4->n4_fhlen = dnp->n_fhp->nfh_len;
|
|
np->n_v4->n4_namelen = len;
|
|
NFSBCOPY(dnp->n_fhp->nfh_fh, np->n_v4->n4_data,
|
|
dnp->n_fhp->nfh_len);
|
|
NFSBCOPY(name, NFS4NODENAME(np->n_v4), len);
|
|
}
|
|
hash = fnv_32_buf(nfhp->nfh_fh, nfhp->nfh_len,
|
|
FNV1_32_INIT);
|
|
onfhp = np->n_fhp;
|
|
/*
|
|
* Rehash node for new file handle.
|
|
*/
|
|
vfs_hash_rehash(vp, hash);
|
|
np->n_fhp = nfhp;
|
|
if (onfhp != NULL)
|
|
free(onfhp, M_NFSFH);
|
|
newvp = NFSTOV(np);
|
|
} else if (NFS_CMPFH(dnp, nfhp->nfh_fh, nfhp->nfh_len)) {
|
|
free(nfhp, M_NFSFH);
|
|
VREF(dvp);
|
|
newvp = dvp;
|
|
} else {
|
|
cn.cn_nameptr = name;
|
|
cn.cn_namelen = len;
|
|
error = nfscl_nget(dvp->v_mount, dvp, nfhp, &cn, td,
|
|
&np, LK_EXCLUSIVE);
|
|
if (error)
|
|
return (error);
|
|
newvp = NFSTOV(np);
|
|
/*
|
|
* If n_localmodtime >= time before RPC, then
|
|
* a file modification operation, such as
|
|
* VOP_SETATTR() of size, has occurred while
|
|
* the Lookup RPC and acquisition of the vnode
|
|
* happened. As such, the attributes might
|
|
* be stale, with possibly an incorrect size.
|
|
*/
|
|
NFSLOCKNODE(np);
|
|
if (timespecisset(&np->n_localmodtime) &&
|
|
timespeccmp(&np->n_localmodtime, &ts, >=)) {
|
|
NFSCL_DEBUG(4, "nfs_lookitup: localmod "
|
|
"stale attributes\n");
|
|
attrflag = 0;
|
|
}
|
|
NFSUNLOCKNODE(np);
|
|
}
|
|
if (!attrflag && *npp == NULL) {
|
|
if (newvp == dvp)
|
|
vrele(newvp);
|
|
else
|
|
vput(newvp);
|
|
return (ENOENT);
|
|
}
|
|
if (attrflag)
|
|
(void) nfscl_loadattrcache(&newvp, &nfsva, NULL, 0, 1);
|
|
}
|
|
if (npp && *npp == NULL) {
|
|
if (error) {
|
|
if (newvp) {
|
|
if (newvp == dvp)
|
|
vrele(newvp);
|
|
else
|
|
vput(newvp);
|
|
}
|
|
} else
|
|
*npp = np;
|
|
}
|
|
if (error && NFS_ISV4(dvp))
|
|
error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Nfs Version 3 and 4 commit rpc
|
|
*/
|
|
int
|
|
ncl_commit(struct vnode *vp, u_quad_t offset, int cnt, struct ucred *cred,
|
|
struct thread *td)
|
|
{
|
|
struct nfsvattr nfsva;
|
|
struct nfsmount *nmp = VFSTONFS(vp->v_mount);
|
|
struct nfsnode *np;
|
|
struct uio uio;
|
|
int error, attrflag;
|
|
|
|
np = VTONFS(vp);
|
|
error = EIO;
|
|
attrflag = 0;
|
|
if (NFSHASPNFS(nmp) && (np->n_flag & NDSCOMMIT) != 0) {
|
|
uio.uio_offset = offset;
|
|
uio.uio_resid = cnt;
|
|
error = nfscl_doiods(vp, &uio, NULL, NULL,
|
|
NFSV4OPEN_ACCESSWRITE, 1, cred, td);
|
|
if (error != 0) {
|
|
NFSLOCKNODE(np);
|
|
np->n_flag &= ~NDSCOMMIT;
|
|
NFSUNLOCKNODE(np);
|
|
}
|
|
}
|
|
if (error != 0) {
|
|
mtx_lock(&nmp->nm_mtx);
|
|
if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0) {
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
return (0);
|
|
}
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
error = nfsrpc_commit(vp, offset, cnt, cred, td, &nfsva,
|
|
&attrflag);
|
|
}
|
|
if (attrflag != 0)
|
|
(void) nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1);
|
|
if (error != 0 && NFS_ISV4(vp))
|
|
error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Strategy routine.
|
|
* For async requests when nfsiod(s) are running, queue the request by
|
|
* calling ncl_asyncio(), otherwise just all ncl_doio() to do the
|
|
* request.
|
|
*/
|
|
static int
|
|
nfs_strategy(struct vop_strategy_args *ap)
|
|
{
|
|
struct buf *bp;
|
|
struct vnode *vp;
|
|
struct ucred *cr;
|
|
|
|
bp = ap->a_bp;
|
|
vp = ap->a_vp;
|
|
KASSERT(bp->b_vp == vp, ("missing b_getvp"));
|
|
KASSERT(!(bp->b_flags & B_DONE),
|
|
("nfs_strategy: buffer %p unexpectedly marked B_DONE", bp));
|
|
|
|
if (vp->v_type == VREG && bp->b_blkno == bp->b_lblkno)
|
|
bp->b_blkno = bp->b_lblkno * (vp->v_bufobj.bo_bsize /
|
|
DEV_BSIZE);
|
|
if (bp->b_iocmd == BIO_READ)
|
|
cr = bp->b_rcred;
|
|
else
|
|
cr = bp->b_wcred;
|
|
|
|
/*
|
|
* 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 ||
|
|
ncl_asyncio(VFSTONFS(vp->v_mount), bp, NOCRED, curthread))
|
|
(void) ncl_doio(vp, bp, cr, curthread, 1);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* fsync vnode op. Just call ncl_flush() with commit == 1.
|
|
*/
|
|
/* ARGSUSED */
|
|
static int
|
|
nfs_fsync(struct vop_fsync_args *ap)
|
|
{
|
|
|
|
if (ap->a_vp->v_type != VREG) {
|
|
/*
|
|
* For NFS, metadata is changed synchronously on the server,
|
|
* so there is nothing to flush. Also, ncl_flush() clears
|
|
* the NMODIFIED flag and that shouldn't be done here for
|
|
* directories.
|
|
*/
|
|
return (0);
|
|
}
|
|
return (ncl_flush(ap->a_vp, ap->a_waitfor, ap->a_td, 1, 0));
|
|
}
|
|
|
|
/*
|
|
* Flush all the blocks associated with a vnode.
|
|
* Walk through the buffer pool and push any dirty pages
|
|
* associated with the vnode.
|
|
* If the called_from_renewthread argument is TRUE, it has been called
|
|
* from the NFSv4 renew thread and, as such, cannot block indefinitely
|
|
* waiting for a buffer write to complete.
|
|
*/
|
|
int
|
|
ncl_flush(struct vnode *vp, int waitfor, struct thread *td,
|
|
int commit, int called_from_renewthread)
|
|
{
|
|
struct nfsnode *np = VTONFS(vp);
|
|
struct buf *bp;
|
|
int i;
|
|
struct buf *nbp;
|
|
struct nfsmount *nmp = VFSTONFS(vp->v_mount);
|
|
int error = 0, slptimeo = 0, slpflag = 0, retv, bvecpos;
|
|
int passone = 1, trycnt = 0;
|
|
u_quad_t off, endoff, toff;
|
|
struct ucred* wcred = NULL;
|
|
struct buf **bvec = NULL;
|
|
struct bufobj *bo;
|
|
#ifndef NFS_COMMITBVECSIZ
|
|
#define NFS_COMMITBVECSIZ 20
|
|
#endif
|
|
struct buf *bvec_on_stack[NFS_COMMITBVECSIZ];
|
|
u_int bvecsize = 0, bveccount;
|
|
struct timespec ts;
|
|
|
|
if (called_from_renewthread != 0)
|
|
slptimeo = hz;
|
|
if (nmp->nm_flag & NFSMNT_INT)
|
|
slpflag = PCATCH;
|
|
if (!commit)
|
|
passone = 0;
|
|
bo = &vp->v_bufobj;
|
|
/*
|
|
* A b_flags == (B_DELWRI | B_NEEDCOMMIT) block has been written to the
|
|
* server, but has not been committed to stable storage on the server
|
|
* yet. On the first pass, the byte range is worked out and the commit
|
|
* rpc is done. On the second pass, ncl_writebp() is called to do the
|
|
* job.
|
|
*/
|
|
again:
|
|
off = (u_quad_t)-1;
|
|
endoff = 0;
|
|
bvecpos = 0;
|
|
if (NFS_ISV34(vp) && commit) {
|
|
if (bvec != NULL && bvec != bvec_on_stack)
|
|
free(bvec, M_TEMP);
|
|
/*
|
|
* Count up how many buffers waiting for a commit.
|
|
*/
|
|
bveccount = 0;
|
|
BO_LOCK(bo);
|
|
TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) {
|
|
if (!BUF_ISLOCKED(bp) &&
|
|
(bp->b_flags & (B_DELWRI | B_NEEDCOMMIT))
|
|
== (B_DELWRI | B_NEEDCOMMIT))
|
|
bveccount++;
|
|
}
|
|
/*
|
|
* Allocate space to remember the list of bufs to commit. It is
|
|
* important to use M_NOWAIT here to avoid a race with nfs_write.
|
|
* If we can't get memory (for whatever reason), we will end up
|
|
* committing the buffers one-by-one in the loop below.
|
|
*/
|
|
if (bveccount > NFS_COMMITBVECSIZ) {
|
|
/*
|
|
* Release the vnode interlock to avoid a lock
|
|
* order reversal.
|
|
*/
|
|
BO_UNLOCK(bo);
|
|
bvec = (struct buf **)
|
|
malloc(bveccount * sizeof(struct buf *),
|
|
M_TEMP, M_NOWAIT);
|
|
BO_LOCK(bo);
|
|
if (bvec == NULL) {
|
|
bvec = bvec_on_stack;
|
|
bvecsize = NFS_COMMITBVECSIZ;
|
|
} else
|
|
bvecsize = bveccount;
|
|
} else {
|
|
bvec = bvec_on_stack;
|
|
bvecsize = NFS_COMMITBVECSIZ;
|
|
}
|
|
TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) {
|
|
if (bvecpos >= bvecsize)
|
|
break;
|
|
if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL)) {
|
|
nbp = TAILQ_NEXT(bp, b_bobufs);
|
|
continue;
|
|
}
|
|
if ((bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) !=
|
|
(B_DELWRI | B_NEEDCOMMIT)) {
|
|
BUF_UNLOCK(bp);
|
|
nbp = TAILQ_NEXT(bp, b_bobufs);
|
|
continue;
|
|
}
|
|
BO_UNLOCK(bo);
|
|
bremfree(bp);
|
|
/*
|
|
* Work out if all buffers are using the same cred
|
|
* so we can deal with them all with one commit.
|
|
*
|
|
* NOTE: we are not clearing B_DONE here, so we have
|
|
* to do it later on in this routine if we intend to
|
|
* initiate I/O on the bp.
|
|
*
|
|
* Note: to avoid loopback deadlocks, we do not
|
|
* assign b_runningbufspace.
|
|
*/
|
|
if (wcred == NULL)
|
|
wcred = bp->b_wcred;
|
|
else if (wcred != bp->b_wcred)
|
|
wcred = NOCRED;
|
|
vfs_busy_pages(bp, 0);
|
|
|
|
BO_LOCK(bo);
|
|
/*
|
|
* bp is protected by being locked, but nbp is not
|
|
* and vfs_busy_pages() may sleep. We have to
|
|
* recalculate nbp.
|
|
*/
|
|
nbp = TAILQ_NEXT(bp, b_bobufs);
|
|
|
|
/*
|
|
* A list of these buffers is kept so that the
|
|
* second loop knows which buffers have actually
|
|
* been committed. This is necessary, since there
|
|
* may be a race between the commit rpc and new
|
|
* uncommitted writes on the file.
|
|
*/
|
|
bvec[bvecpos++] = bp;
|
|
toff = ((u_quad_t)bp->b_blkno) * DEV_BSIZE +
|
|
bp->b_dirtyoff;
|
|
if (toff < off)
|
|
off = toff;
|
|
toff += (u_quad_t)(bp->b_dirtyend - bp->b_dirtyoff);
|
|
if (toff > endoff)
|
|
endoff = toff;
|
|
}
|
|
BO_UNLOCK(bo);
|
|
}
|
|
if (bvecpos > 0) {
|
|
/*
|
|
* Commit data on the server, as required.
|
|
* If all bufs are using the same wcred, then use that with
|
|
* one call for all of them, otherwise commit each one
|
|
* separately.
|
|
*/
|
|
if (wcred != NOCRED)
|
|
retv = ncl_commit(vp, off, (int)(endoff - off),
|
|
wcred, td);
|
|
else {
|
|
retv = 0;
|
|
for (i = 0; i < bvecpos; i++) {
|
|
off_t off, size;
|
|
bp = bvec[i];
|
|
off = ((u_quad_t)bp->b_blkno) * DEV_BSIZE +
|
|
bp->b_dirtyoff;
|
|
size = (u_quad_t)(bp->b_dirtyend
|
|
- bp->b_dirtyoff);
|
|
retv = ncl_commit(vp, off, (int)size,
|
|
bp->b_wcred, td);
|
|
if (retv) break;
|
|
}
|
|
}
|
|
|
|
if (retv == NFSERR_STALEWRITEVERF)
|
|
ncl_clearcommit(vp->v_mount);
|
|
|
|
/*
|
|
* Now, either mark the blocks I/O done or mark the
|
|
* blocks dirty, depending on whether the commit
|
|
* succeeded.
|
|
*/
|
|
for (i = 0; i < bvecpos; i++) {
|
|
bp = bvec[i];
|
|
bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK);
|
|
if (!NFSCL_FORCEDISM(vp->v_mount) && retv) {
|
|
/*
|
|
* Error, leave B_DELWRI intact
|
|
*/
|
|
vfs_unbusy_pages(bp);
|
|
brelse(bp);
|
|
} else {
|
|
/*
|
|
* Success, remove B_DELWRI ( bundirty() ).
|
|
*
|
|
* b_dirtyoff/b_dirtyend seem to be NFS
|
|
* specific. We should probably move that
|
|
* into bundirty(). XXX
|
|
*/
|
|
bufobj_wref(bo);
|
|
bp->b_flags |= B_ASYNC;
|
|
bundirty(bp);
|
|
bp->b_flags &= ~B_DONE;
|
|
bp->b_ioflags &= ~BIO_ERROR;
|
|
bp->b_dirtyoff = bp->b_dirtyend = 0;
|
|
bufdone(bp);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Start/do any write(s) that are required.
|
|
*/
|
|
loop:
|
|
BO_LOCK(bo);
|
|
TAILQ_FOREACH_SAFE(bp, &bo->bo_dirty.bv_hd, b_bobufs, nbp) {
|
|
if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT, NULL)) {
|
|
if (waitfor != MNT_WAIT || passone)
|
|
continue;
|
|
|
|
error = BUF_TIMELOCK(bp,
|
|
LK_EXCLUSIVE | LK_SLEEPFAIL | LK_INTERLOCK,
|
|
BO_LOCKPTR(bo), "nfsfsync", slpflag, slptimeo);
|
|
if (error == 0) {
|
|
BUF_UNLOCK(bp);
|
|
goto loop;
|
|
}
|
|
if (error == ENOLCK) {
|
|
error = 0;
|
|
goto loop;
|
|
}
|
|
if (called_from_renewthread != 0) {
|
|
/*
|
|
* Return EIO so the flush will be retried
|
|
* later.
|
|
*/
|
|
error = EIO;
|
|
goto done;
|
|
}
|
|
if (newnfs_sigintr(nmp, td)) {
|
|
error = EINTR;
|
|
goto done;
|
|
}
|
|
if (slpflag == PCATCH) {
|
|
slpflag = 0;
|
|
slptimeo = 2 * hz;
|
|
}
|
|
goto loop;
|
|
}
|
|
if ((bp->b_flags & B_DELWRI) == 0)
|
|
panic("nfs_fsync: not dirty");
|
|
if ((passone || !commit) && (bp->b_flags & B_NEEDCOMMIT)) {
|
|
BUF_UNLOCK(bp);
|
|
continue;
|
|
}
|
|
BO_UNLOCK(bo);
|
|
bremfree(bp);
|
|
bp->b_flags |= B_ASYNC;
|
|
bwrite(bp);
|
|
if (newnfs_sigintr(nmp, td)) {
|
|
error = EINTR;
|
|
goto done;
|
|
}
|
|
goto loop;
|
|
}
|
|
if (passone) {
|
|
passone = 0;
|
|
BO_UNLOCK(bo);
|
|
goto again;
|
|
}
|
|
if (waitfor == MNT_WAIT) {
|
|
while (bo->bo_numoutput) {
|
|
error = bufobj_wwait(bo, slpflag, slptimeo);
|
|
if (error) {
|
|
BO_UNLOCK(bo);
|
|
if (called_from_renewthread != 0) {
|
|
/*
|
|
* Return EIO so that the flush will be
|
|
* retried later.
|
|
*/
|
|
error = EIO;
|
|
goto done;
|
|
}
|
|
error = newnfs_sigintr(nmp, td);
|
|
if (error)
|
|
goto done;
|
|
if (slpflag == PCATCH) {
|
|
slpflag = 0;
|
|
slptimeo = 2 * hz;
|
|
}
|
|
BO_LOCK(bo);
|
|
}
|
|
}
|
|
if (bo->bo_dirty.bv_cnt != 0 && commit) {
|
|
BO_UNLOCK(bo);
|
|
goto loop;
|
|
}
|
|
/*
|
|
* Wait for all the async IO requests to drain
|
|
*/
|
|
BO_UNLOCK(bo);
|
|
NFSLOCKNODE(np);
|
|
while (np->n_directio_asyncwr > 0) {
|
|
np->n_flag |= NFSYNCWAIT;
|
|
error = newnfs_msleep(td, &np->n_directio_asyncwr,
|
|
&np->n_mtx, slpflag | (PRIBIO + 1),
|
|
"nfsfsync", 0);
|
|
if (error) {
|
|
if (newnfs_sigintr(nmp, td)) {
|
|
NFSUNLOCKNODE(np);
|
|
error = EINTR;
|
|
goto done;
|
|
}
|
|
}
|
|
}
|
|
NFSUNLOCKNODE(np);
|
|
} else
|
|
BO_UNLOCK(bo);
|
|
if (NFSHASPNFS(nmp)) {
|
|
nfscl_layoutcommit(vp, td);
|
|
/*
|
|
* Invalidate the attribute cache, since writes to a DS
|
|
* won't update the size attribute.
|
|
*/
|
|
NFSLOCKNODE(np);
|
|
np->n_attrstamp = 0;
|
|
} else
|
|
NFSLOCKNODE(np);
|
|
if (np->n_flag & NWRITEERR) {
|
|
error = np->n_error;
|
|
np->n_flag &= ~NWRITEERR;
|
|
}
|
|
if (commit && bo->bo_dirty.bv_cnt == 0 &&
|
|
bo->bo_numoutput == 0 && np->n_directio_asyncwr == 0)
|
|
np->n_flag &= ~NMODIFIED;
|
|
NFSUNLOCKNODE(np);
|
|
done:
|
|
if (bvec != NULL && bvec != bvec_on_stack)
|
|
free(bvec, M_TEMP);
|
|
if (error == 0 && commit != 0 && waitfor == MNT_WAIT &&
|
|
(bo->bo_dirty.bv_cnt != 0 || bo->bo_numoutput != 0 ||
|
|
np->n_directio_asyncwr != 0)) {
|
|
if (trycnt++ < 5) {
|
|
/* try, try again... */
|
|
passone = 1;
|
|
wcred = NULL;
|
|
bvec = NULL;
|
|
bvecsize = 0;
|
|
goto again;
|
|
}
|
|
vn_printf(vp, "ncl_flush failed");
|
|
error = called_from_renewthread != 0 ? EIO : EBUSY;
|
|
}
|
|
if (error == 0) {
|
|
nanouptime(&ts);
|
|
NFSLOCKNODE(np);
|
|
np->n_localmodtime = ts;
|
|
NFSUNLOCKNODE(np);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* NFS advisory byte-level locks.
|
|
*/
|
|
static int
|
|
nfs_advlock(struct vop_advlock_args *ap)
|
|
{
|
|
struct vnode *vp = ap->a_vp;
|
|
struct ucred *cred;
|
|
struct nfsnode *np = VTONFS(ap->a_vp);
|
|
struct proc *p = (struct proc *)ap->a_id;
|
|
struct thread *td = curthread; /* XXX */
|
|
struct vattr va;
|
|
int ret, error;
|
|
u_quad_t size;
|
|
struct nfsmount *nmp;
|
|
|
|
error = NFSVOPLOCK(vp, LK_SHARED);
|
|
if (error != 0)
|
|
return (EBADF);
|
|
nmp = VFSTONFS(vp->v_mount);
|
|
if (!NFS_ISV4(vp) || (nmp->nm_flag & NFSMNT_NOLOCKD) != 0) {
|
|
if ((nmp->nm_flag & NFSMNT_NOLOCKD) != 0) {
|
|
size = np->n_size;
|
|
NFSVOPUNLOCK(vp);
|
|
error = lf_advlock(ap, &(vp->v_lockf), size);
|
|
} else {
|
|
if (nfs_advlock_p != NULL)
|
|
error = nfs_advlock_p(ap);
|
|
else {
|
|
NFSVOPUNLOCK(vp);
|
|
error = ENOLCK;
|
|
}
|
|
}
|
|
if (error == 0 && ap->a_op == F_SETLK) {
|
|
error = NFSVOPLOCK(vp, LK_SHARED);
|
|
if (error == 0) {
|
|
/* Mark that a file lock has been acquired. */
|
|
NFSLOCKNODE(np);
|
|
np->n_flag |= NHASBEENLOCKED;
|
|
NFSUNLOCKNODE(np);
|
|
NFSVOPUNLOCK(vp);
|
|
}
|
|
}
|
|
return (error);
|
|
} else if ((ap->a_flags & (F_POSIX | F_FLOCK)) != 0) {
|
|
if (vp->v_type != VREG) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
if ((ap->a_flags & F_POSIX) != 0)
|
|
cred = p->p_ucred;
|
|
else
|
|
cred = td->td_ucred;
|
|
NFSVOPLOCK(vp, LK_UPGRADE | LK_RETRY);
|
|
if (VN_IS_DOOMED(vp)) {
|
|
error = EBADF;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* If this is unlocking a write locked region, flush and
|
|
* commit them before unlocking. This is required by
|
|
* RFC3530 Sec. 9.3.2.
|
|
*/
|
|
if (ap->a_op == F_UNLCK &&
|
|
nfscl_checkwritelocked(vp, ap->a_fl, cred, td, ap->a_id,
|
|
ap->a_flags))
|
|
(void) ncl_flush(vp, MNT_WAIT, td, 1, 0);
|
|
|
|
/*
|
|
* Mark NFS node as might have acquired a lock.
|
|
* This is separate from NHASBEENLOCKED, because it must
|
|
* be done before the nfsrpc_advlock() call, which might
|
|
* add a nfscllock structure to the client state.
|
|
* It is used to check for the case where a nfscllock
|
|
* state structure cannot exist for the file.
|
|
* Only done for "oneopenown" NFSv4.1/4.2 mounts.
|
|
*/
|
|
if (NFSHASNFSV4N(nmp) && NFSHASONEOPENOWN(nmp)) {
|
|
NFSLOCKNODE(np);
|
|
np->n_flag |= NMIGHTBELOCKED;
|
|
NFSUNLOCKNODE(np);
|
|
}
|
|
|
|
/*
|
|
* Loop around doing the lock op, while a blocking lock
|
|
* must wait for the lock op to succeed.
|
|
*/
|
|
do {
|
|
ret = nfsrpc_advlock(vp, np->n_size, ap->a_op,
|
|
ap->a_fl, 0, cred, td, ap->a_id, ap->a_flags);
|
|
if (ret == NFSERR_DENIED && (ap->a_flags & F_WAIT) &&
|
|
ap->a_op == F_SETLK) {
|
|
NFSVOPUNLOCK(vp);
|
|
error = nfs_catnap(PZERO | PCATCH, ret,
|
|
"ncladvl");
|
|
if (error)
|
|
return (EINTR);
|
|
NFSVOPLOCK(vp, LK_EXCLUSIVE | LK_RETRY);
|
|
if (VN_IS_DOOMED(vp)) {
|
|
error = EBADF;
|
|
goto out;
|
|
}
|
|
}
|
|
} while (ret == NFSERR_DENIED && (ap->a_flags & F_WAIT) &&
|
|
ap->a_op == F_SETLK);
|
|
if (ret == NFSERR_DENIED) {
|
|
error = EAGAIN;
|
|
goto out;
|
|
} else if (ret == EINVAL || ret == EBADF || ret == EINTR) {
|
|
error = ret;
|
|
goto out;
|
|
} else if (ret != 0) {
|
|
error = EACCES;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Now, if we just got a lock, invalidate data in the buffer
|
|
* cache, as required, so that the coherency conforms with
|
|
* RFC3530 Sec. 9.3.2.
|
|
*/
|
|
if (ap->a_op == F_SETLK) {
|
|
if ((np->n_flag & NMODIFIED) == 0) {
|
|
np->n_attrstamp = 0;
|
|
KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
|
|
ret = VOP_GETATTR(vp, &va, cred);
|
|
}
|
|
if ((np->n_flag & NMODIFIED) || ret ||
|
|
np->n_change != va.va_filerev) {
|
|
(void) ncl_vinvalbuf(vp, V_SAVE, td, 1);
|
|
np->n_attrstamp = 0;
|
|
KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
|
|
ret = VOP_GETATTR(vp, &va, cred);
|
|
if (!ret) {
|
|
np->n_mtime = va.va_mtime;
|
|
np->n_change = va.va_filerev;
|
|
}
|
|
}
|
|
/* Mark that a file lock has been acquired. */
|
|
NFSLOCKNODE(np);
|
|
np->n_flag |= NHASBEENLOCKED;
|
|
NFSUNLOCKNODE(np);
|
|
}
|
|
} else
|
|
error = EOPNOTSUPP;
|
|
out:
|
|
NFSVOPUNLOCK(vp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* NFS advisory byte-level locks.
|
|
*/
|
|
static int
|
|
nfs_advlockasync(struct vop_advlockasync_args *ap)
|
|
{
|
|
struct vnode *vp = ap->a_vp;
|
|
u_quad_t size;
|
|
int error;
|
|
|
|
error = NFSVOPLOCK(vp, LK_SHARED);
|
|
if (error)
|
|
return (error);
|
|
if (NFS_ISV4(vp)) {
|
|
NFSVOPUNLOCK(vp);
|
|
return (EOPNOTSUPP);
|
|
}
|
|
if ((VFSTONFS(vp->v_mount)->nm_flag & NFSMNT_NOLOCKD) != 0) {
|
|
size = VTONFS(vp)->n_size;
|
|
NFSVOPUNLOCK(vp);
|
|
error = lf_advlockasync(ap, &(vp->v_lockf), size);
|
|
} else {
|
|
NFSVOPUNLOCK(vp);
|
|
error = EOPNOTSUPP;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Print out the contents of an nfsnode.
|
|
*/
|
|
static int
|
|
nfs_print(struct vop_print_args *ap)
|
|
{
|
|
struct vnode *vp = ap->a_vp;
|
|
struct nfsnode *np = VTONFS(vp);
|
|
|
|
printf("\tfileid %jd fsid 0x%jx", (uintmax_t)np->n_vattr.na_fileid,
|
|
(uintmax_t)np->n_vattr.na_fsid);
|
|
if (vp->v_type == VFIFO)
|
|
fifo_printinfo(vp);
|
|
printf("\n");
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* This is the "real" nfs::bwrite(struct buf*).
|
|
* We set B_CACHE if this is a VMIO buffer.
|
|
*/
|
|
int
|
|
ncl_writebp(struct buf *bp, int force __unused, struct thread *td)
|
|
{
|
|
int oldflags, rtval;
|
|
|
|
if (bp->b_flags & B_INVAL) {
|
|
brelse(bp);
|
|
return (0);
|
|
}
|
|
|
|
oldflags = bp->b_flags;
|
|
bp->b_flags |= B_CACHE;
|
|
|
|
/*
|
|
* Undirty the bp. We will redirty it later if the I/O fails.
|
|
*/
|
|
bundirty(bp);
|
|
bp->b_flags &= ~B_DONE;
|
|
bp->b_ioflags &= ~BIO_ERROR;
|
|
bp->b_iocmd = BIO_WRITE;
|
|
|
|
bufobj_wref(bp->b_bufobj);
|
|
curthread->td_ru.ru_oublock++;
|
|
|
|
/*
|
|
* Note: to avoid loopback deadlocks, we do not
|
|
* assign b_runningbufspace.
|
|
*/
|
|
vfs_busy_pages(bp, 1);
|
|
|
|
BUF_KERNPROC(bp);
|
|
bp->b_iooffset = dbtob(bp->b_blkno);
|
|
bstrategy(bp);
|
|
|
|
if ((oldflags & B_ASYNC) != 0)
|
|
return (0);
|
|
|
|
rtval = bufwait(bp);
|
|
if (oldflags & B_DELWRI)
|
|
reassignbuf(bp);
|
|
brelse(bp);
|
|
return (rtval);
|
|
}
|
|
|
|
/*
|
|
* nfs special file access vnode op.
|
|
* Essentially just get vattr and then imitate iaccess() since the device is
|
|
* local to the client.
|
|
*/
|
|
static int
|
|
nfsspec_access(struct vop_access_args *ap)
|
|
{
|
|
struct vattr *vap;
|
|
struct ucred *cred = ap->a_cred;
|
|
struct vnode *vp = ap->a_vp;
|
|
accmode_t accmode = ap->a_accmode;
|
|
struct vattr vattr;
|
|
int 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 ((accmode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) {
|
|
switch (vp->v_type) {
|
|
case VREG:
|
|
case VDIR:
|
|
case VLNK:
|
|
return (EROFS);
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
vap = &vattr;
|
|
error = VOP_GETATTR(vp, vap, cred);
|
|
if (error)
|
|
goto out;
|
|
error = vaccess(vp->v_type, vap->va_mode, vap->va_uid, vap->va_gid,
|
|
accmode, cred);
|
|
out:
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Read wrapper for fifos.
|
|
*/
|
|
static int
|
|
nfsfifo_read(struct vop_read_args *ap)
|
|
{
|
|
struct nfsnode *np = VTONFS(ap->a_vp);
|
|
int error;
|
|
|
|
/*
|
|
* Set access flag.
|
|
*/
|
|
NFSLOCKNODE(np);
|
|
np->n_flag |= NACC;
|
|
vfs_timestamp(&np->n_atim);
|
|
NFSUNLOCKNODE(np);
|
|
error = fifo_specops.vop_read(ap);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Write wrapper for fifos.
|
|
*/
|
|
static int
|
|
nfsfifo_write(struct vop_write_args *ap)
|
|
{
|
|
struct nfsnode *np = VTONFS(ap->a_vp);
|
|
|
|
/*
|
|
* Set update flag.
|
|
*/
|
|
NFSLOCKNODE(np);
|
|
np->n_flag |= NUPD;
|
|
vfs_timestamp(&np->n_mtim);
|
|
NFSUNLOCKNODE(np);
|
|
return(fifo_specops.vop_write(ap));
|
|
}
|
|
|
|
/*
|
|
* Close wrapper for fifos.
|
|
*
|
|
* Update the times on the nfsnode then do fifo close.
|
|
*/
|
|
static int
|
|
nfsfifo_close(struct vop_close_args *ap)
|
|
{
|
|
struct vnode *vp = ap->a_vp;
|
|
struct nfsnode *np = VTONFS(vp);
|
|
struct vattr vattr;
|
|
struct timespec ts;
|
|
|
|
NFSLOCKNODE(np);
|
|
if (np->n_flag & (NACC | NUPD)) {
|
|
vfs_timestamp(&ts);
|
|
if (np->n_flag & NACC)
|
|
np->n_atim = ts;
|
|
if (np->n_flag & NUPD)
|
|
np->n_mtim = ts;
|
|
np->n_flag |= NCHG;
|
|
if (vrefcnt(vp) == 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;
|
|
NFSUNLOCKNODE(np);
|
|
(void)VOP_SETATTR(vp, &vattr, ap->a_cred);
|
|
goto out;
|
|
}
|
|
}
|
|
NFSUNLOCKNODE(np);
|
|
out:
|
|
return (fifo_specops.vop_close(ap));
|
|
}
|
|
|
|
/*
|
|
* Just call ncl_writebp() with the force argument set to 1.
|
|
*
|
|
* NOTE: B_DONE may or may not be set in a_bp on call.
|
|
*/
|
|
static int
|
|
nfs_bwrite(struct buf *bp)
|
|
{
|
|
|
|
return (ncl_writebp(bp, 1, curthread));
|
|
}
|
|
|
|
struct buf_ops buf_ops_newnfs = {
|
|
.bop_name = "buf_ops_nfs",
|
|
.bop_write = nfs_bwrite,
|
|
.bop_strategy = bufstrategy,
|
|
.bop_sync = bufsync,
|
|
.bop_bdflush = bufbdflush,
|
|
};
|
|
|
|
static int
|
|
nfs_getacl(struct vop_getacl_args *ap)
|
|
{
|
|
int error;
|
|
|
|
if (ap->a_type != ACL_TYPE_NFS4)
|
|
return (EOPNOTSUPP);
|
|
error = nfsrpc_getacl(ap->a_vp, ap->a_cred, ap->a_td, ap->a_aclp);
|
|
if (error > NFSERR_STALE) {
|
|
(void) nfscl_maperr(ap->a_td, error, (uid_t)0, (gid_t)0);
|
|
error = EPERM;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
nfs_setacl(struct vop_setacl_args *ap)
|
|
{
|
|
int error;
|
|
|
|
if (ap->a_type != ACL_TYPE_NFS4)
|
|
return (EOPNOTSUPP);
|
|
error = nfsrpc_setacl(ap->a_vp, ap->a_cred, ap->a_td, ap->a_aclp);
|
|
if (error > NFSERR_STALE) {
|
|
(void) nfscl_maperr(ap->a_td, error, (uid_t)0, (gid_t)0);
|
|
error = EPERM;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* VOP_ADVISE for NFS.
|
|
* Just return 0 for any errors, since it is just a hint.
|
|
*/
|
|
static int
|
|
nfs_advise(struct vop_advise_args *ap)
|
|
{
|
|
struct thread *td = curthread;
|
|
struct nfsmount *nmp;
|
|
uint64_t len;
|
|
int error;
|
|
|
|
/*
|
|
* First do vop_stdadvise() to handle the buffer cache.
|
|
*/
|
|
error = vop_stdadvise(ap);
|
|
if (error != 0)
|
|
return (error);
|
|
if (ap->a_start < 0 || ap->a_end < 0)
|
|
return (0);
|
|
if (ap->a_end == OFF_MAX)
|
|
len = 0;
|
|
else if (ap->a_end < ap->a_start)
|
|
return (0);
|
|
else
|
|
len = ap->a_end - ap->a_start + 1;
|
|
nmp = VFSTONFS(ap->a_vp->v_mount);
|
|
mtx_lock(&nmp->nm_mtx);
|
|
if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION ||
|
|
(NFSHASPNFS(nmp) && (nmp->nm_privflag & NFSMNTP_IOADVISETHRUMDS) ==
|
|
0) || (nmp->nm_privflag & NFSMNTP_NOADVISE) != 0) {
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
return (0);
|
|
}
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
error = nfsrpc_advise(ap->a_vp, ap->a_start, len, ap->a_advice,
|
|
td->td_ucred, td);
|
|
if (error == NFSERR_NOTSUPP) {
|
|
mtx_lock(&nmp->nm_mtx);
|
|
nmp->nm_privflag |= NFSMNTP_NOADVISE;
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* nfs allocate call
|
|
*/
|
|
static int
|
|
nfs_allocate(struct vop_allocate_args *ap)
|
|
{
|
|
struct vnode *vp = ap->a_vp;
|
|
struct thread *td = curthread;
|
|
struct nfsvattr nfsva;
|
|
struct nfsmount *nmp;
|
|
struct nfsnode *np;
|
|
off_t alen;
|
|
int attrflag, error, ret;
|
|
struct timespec ts;
|
|
struct uio io;
|
|
|
|
attrflag = 0;
|
|
nmp = VFSTONFS(vp->v_mount);
|
|
np = VTONFS(vp);
|
|
mtx_lock(&nmp->nm_mtx);
|
|
if (NFSHASNFSV4(nmp) && nmp->nm_minorvers >= NFSV42_MINORVERSION &&
|
|
(nmp->nm_privflag & NFSMNTP_NOALLOCATE) == 0) {
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
alen = *ap->a_len;
|
|
if ((uint64_t)alen > nfs_maxalloclen)
|
|
alen = nfs_maxalloclen;
|
|
|
|
/* Check the file size limit. */
|
|
io.uio_offset = *ap->a_offset;
|
|
io.uio_resid = alen;
|
|
error = vn_rlimit_fsize(vp, &io, td);
|
|
|
|
/*
|
|
* Flush first to ensure that the allocate adds to the
|
|
* file's allocation on the server.
|
|
*/
|
|
if (error == 0)
|
|
error = ncl_flush(vp, MNT_WAIT, td, 1, 0);
|
|
if (error == 0)
|
|
error = nfsrpc_allocate(vp, *ap->a_offset, alen,
|
|
&nfsva, &attrflag, ap->a_cred, td);
|
|
if (error == 0) {
|
|
*ap->a_offset += alen;
|
|
*ap->a_len -= alen;
|
|
nanouptime(&ts);
|
|
NFSLOCKNODE(np);
|
|
np->n_localmodtime = ts;
|
|
NFSUNLOCKNODE(np);
|
|
} else if (error == NFSERR_NOTSUPP) {
|
|
mtx_lock(&nmp->nm_mtx);
|
|
nmp->nm_privflag |= NFSMNTP_NOALLOCATE;
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
error = EINVAL;
|
|
}
|
|
} else {
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
error = EINVAL;
|
|
}
|
|
if (attrflag != 0) {
|
|
ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1);
|
|
if (error == 0 && ret != 0)
|
|
error = ret;
|
|
}
|
|
if (error != 0)
|
|
error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* nfs deallocate call
|
|
*/
|
|
static int
|
|
nfs_deallocate(struct vop_deallocate_args *ap)
|
|
{
|
|
struct vnode *vp = ap->a_vp;
|
|
struct thread *td = curthread;
|
|
struct nfsvattr nfsva;
|
|
struct nfsmount *nmp;
|
|
struct nfsnode *np;
|
|
off_t tlen, mlen;
|
|
int attrflag, error, ret;
|
|
bool clipped;
|
|
struct timespec ts;
|
|
|
|
error = 0;
|
|
attrflag = 0;
|
|
nmp = VFSTONFS(vp->v_mount);
|
|
np = VTONFS(vp);
|
|
mtx_lock(&nmp->nm_mtx);
|
|
if (NFSHASNFSV4(nmp) && nmp->nm_minorvers >= NFSV42_MINORVERSION &&
|
|
(nmp->nm_privflag & NFSMNTP_NODEALLOCATE) == 0) {
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
tlen = omin(OFF_MAX - *ap->a_offset, *ap->a_len);
|
|
NFSCL_DEBUG(4, "dealloc: off=%jd len=%jd maxfilesize=%ju\n",
|
|
(intmax_t)*ap->a_offset, (intmax_t)tlen,
|
|
(uintmax_t)nmp->nm_maxfilesize);
|
|
if ((uint64_t)*ap->a_offset >= nmp->nm_maxfilesize) {
|
|
/* Avoid EFBIG error return from the NFSv4.2 server. */
|
|
*ap->a_len = 0;
|
|
return (0);
|
|
}
|
|
clipped = false;
|
|
if ((uint64_t)*ap->a_offset + tlen > nmp->nm_maxfilesize)
|
|
tlen = nmp->nm_maxfilesize - *ap->a_offset;
|
|
if ((uint64_t)*ap->a_offset < np->n_size) {
|
|
/* Limit the len to nfs_maxalloclen before EOF. */
|
|
mlen = omin((off_t)np->n_size - *ap->a_offset, tlen);
|
|
if ((uint64_t)mlen > nfs_maxalloclen) {
|
|
NFSCL_DEBUG(4, "dealloc: tlen maxalloclen\n");
|
|
tlen = nfs_maxalloclen;
|
|
clipped = true;
|
|
}
|
|
}
|
|
if (error == 0)
|
|
error = ncl_vinvalbuf(vp, V_SAVE, td, 1);
|
|
if (error == 0) {
|
|
vnode_pager_purge_range(vp, *ap->a_offset,
|
|
*ap->a_offset + tlen);
|
|
error = nfsrpc_deallocate(vp, *ap->a_offset, tlen,
|
|
&nfsva, &attrflag, ap->a_cred, td);
|
|
NFSCL_DEBUG(4, "dealloc: rpc=%d\n", error);
|
|
}
|
|
if (error == 0) {
|
|
NFSCL_DEBUG(4, "dealloc: attrflag=%d na_size=%ju\n",
|
|
attrflag, (uintmax_t)nfsva.na_size);
|
|
nanouptime(&ts);
|
|
NFSLOCKNODE(np);
|
|
np->n_localmodtime = ts;
|
|
NFSUNLOCKNODE(np);
|
|
if (attrflag != 0) {
|
|
if ((uint64_t)*ap->a_offset < nfsva.na_size)
|
|
*ap->a_offset += omin((off_t)
|
|
nfsva.na_size - *ap->a_offset,
|
|
tlen);
|
|
}
|
|
if (clipped && tlen < *ap->a_len)
|
|
*ap->a_len -= tlen;
|
|
else
|
|
*ap->a_len = 0;
|
|
} else if (error == NFSERR_NOTSUPP) {
|
|
mtx_lock(&nmp->nm_mtx);
|
|
nmp->nm_privflag |= NFSMNTP_NODEALLOCATE;
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
}
|
|
} else {
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
error = EIO;
|
|
}
|
|
/*
|
|
* If the NFS server cannot perform the Deallocate operation, just call
|
|
* vop_stddeallocate() to perform it.
|
|
*/
|
|
if (error != 0 && error != NFSERR_FBIG && error != NFSERR_INVAL) {
|
|
error = vop_stddeallocate(ap);
|
|
NFSCL_DEBUG(4, "dealloc: stddeallocate=%d\n", error);
|
|
}
|
|
if (attrflag != 0) {
|
|
ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1);
|
|
if (error == 0 && ret != 0)
|
|
error = ret;
|
|
}
|
|
if (error != 0)
|
|
error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* nfs copy_file_range call
|
|
*/
|
|
static int
|
|
nfs_copy_file_range(struct vop_copy_file_range_args *ap)
|
|
{
|
|
struct vnode *invp = ap->a_invp;
|
|
struct vnode *outvp = ap->a_outvp;
|
|
struct mount *mp;
|
|
struct nfsvattr innfsva, outnfsva;
|
|
struct vattr *vap;
|
|
struct uio io;
|
|
struct nfsmount *nmp;
|
|
size_t len, len2;
|
|
ssize_t r;
|
|
int error, inattrflag, outattrflag, ret, ret2;
|
|
off_t inoff, outoff;
|
|
bool consecutive, must_commit, tryoutcred;
|
|
|
|
/* NFSv4.2 Copy is not permitted for infile == outfile. */
|
|
if (invp == outvp) {
|
|
generic_copy:
|
|
return (vn_generic_copy_file_range(invp, ap->a_inoffp,
|
|
outvp, ap->a_outoffp, ap->a_lenp, ap->a_flags,
|
|
ap->a_incred, ap->a_outcred, ap->a_fsizetd));
|
|
}
|
|
|
|
/* Lock both vnodes, avoiding risk of deadlock. */
|
|
do {
|
|
mp = NULL;
|
|
error = vn_start_write(outvp, &mp, V_WAIT);
|
|
if (error == 0) {
|
|
error = vn_lock(outvp, LK_EXCLUSIVE);
|
|
if (error == 0) {
|
|
error = vn_lock(invp, LK_SHARED | LK_NOWAIT);
|
|
if (error == 0)
|
|
break;
|
|
VOP_UNLOCK(outvp);
|
|
if (mp != NULL)
|
|
vn_finished_write(mp);
|
|
mp = NULL;
|
|
error = vn_lock(invp, LK_SHARED);
|
|
if (error == 0)
|
|
VOP_UNLOCK(invp);
|
|
}
|
|
}
|
|
if (mp != NULL)
|
|
vn_finished_write(mp);
|
|
} while (error == 0);
|
|
if (error != 0)
|
|
return (error);
|
|
|
|
/*
|
|
* More reasons to avoid nfs copy: not NFSv4.2, or explicitly
|
|
* disabled.
|
|
*/
|
|
nmp = VFSTONFS(invp->v_mount);
|
|
mtx_lock(&nmp->nm_mtx);
|
|
if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION ||
|
|
(nmp->nm_privflag & NFSMNTP_NOCOPY) != 0) {
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
VOP_UNLOCK(invp);
|
|
VOP_UNLOCK(outvp);
|
|
if (mp != NULL)
|
|
vn_finished_write(mp);
|
|
goto generic_copy;
|
|
}
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
|
|
/*
|
|
* Do the vn_rlimit_fsize() check. Should this be above the VOP layer?
|
|
*/
|
|
io.uio_offset = *ap->a_outoffp;
|
|
io.uio_resid = *ap->a_lenp;
|
|
error = vn_rlimit_fsizex(outvp, &io, 0, &r, ap->a_fsizetd);
|
|
*ap->a_lenp = io.uio_resid;
|
|
/*
|
|
* No need to call vn_rlimit_fsizex_res before return, since the uio is
|
|
* local.
|
|
*/
|
|
|
|
/*
|
|
* Flush the input file so that the data is up to date before
|
|
* the copy. Flush writes for the output file so that they
|
|
* do not overwrite the data copied to the output file by the Copy.
|
|
* Set the commit argument for both flushes so that the data is on
|
|
* stable storage before the Copy RPC. This is done in case the
|
|
* server reboots during the Copy and needs to be redone.
|
|
*/
|
|
if (error == 0)
|
|
error = ncl_flush(invp, MNT_WAIT, curthread, 1, 0);
|
|
if (error == 0)
|
|
error = ncl_flush(outvp, MNT_WAIT, curthread, 1, 0);
|
|
|
|
/* Do the actual NFSv4.2 RPC. */
|
|
ret = ret2 = 0;
|
|
len = *ap->a_lenp;
|
|
mtx_lock(&nmp->nm_mtx);
|
|
if ((nmp->nm_privflag & NFSMNTP_NOCONSECUTIVE) == 0)
|
|
consecutive = true;
|
|
else
|
|
consecutive = false;
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
inoff = *ap->a_inoffp;
|
|
outoff = *ap->a_outoffp;
|
|
tryoutcred = true;
|
|
must_commit = false;
|
|
if (error == 0) {
|
|
vap = &VTONFS(invp)->n_vattr.na_vattr;
|
|
error = VOP_GETATTR(invp, vap, ap->a_incred);
|
|
if (error == 0) {
|
|
/*
|
|
* Clip "len" at va_size so that RFC compliant servers
|
|
* will not reply NFSERR_INVAL.
|
|
* Setting "len == 0" for the RPC would be preferred,
|
|
* but some Linux servers do not support that.
|
|
*/
|
|
if (inoff >= vap->va_size)
|
|
*ap->a_lenp = len = 0;
|
|
else if (inoff + len > vap->va_size)
|
|
*ap->a_lenp = len = vap->va_size - inoff;
|
|
} else
|
|
error = 0;
|
|
}
|
|
|
|
/*
|
|
* len will be set to 0 upon a successful Copy RPC.
|
|
* As such, this only loops when the Copy RPC needs to be retried.
|
|
*/
|
|
while (len > 0 && error == 0) {
|
|
inattrflag = outattrflag = 0;
|
|
len2 = len;
|
|
if (tryoutcred)
|
|
error = nfsrpc_copy_file_range(invp, ap->a_inoffp,
|
|
outvp, ap->a_outoffp, &len2, ap->a_flags,
|
|
&inattrflag, &innfsva, &outattrflag, &outnfsva,
|
|
ap->a_outcred, consecutive, &must_commit);
|
|
else
|
|
error = nfsrpc_copy_file_range(invp, ap->a_inoffp,
|
|
outvp, ap->a_outoffp, &len2, ap->a_flags,
|
|
&inattrflag, &innfsva, &outattrflag, &outnfsva,
|
|
ap->a_incred, consecutive, &must_commit);
|
|
if (inattrflag != 0)
|
|
ret = nfscl_loadattrcache(&invp, &innfsva, NULL, 0, 1);
|
|
if (outattrflag != 0)
|
|
ret2 = nfscl_loadattrcache(&outvp, &outnfsva, NULL,
|
|
1, 1);
|
|
if (error == 0) {
|
|
if (consecutive == false) {
|
|
if (len2 == len) {
|
|
mtx_lock(&nmp->nm_mtx);
|
|
nmp->nm_privflag |=
|
|
NFSMNTP_NOCONSECUTIVE;
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
} else
|
|
error = NFSERR_OFFLOADNOREQS;
|
|
}
|
|
*ap->a_lenp = len2;
|
|
len = 0;
|
|
if (len2 > 0 && must_commit && error == 0)
|
|
error = ncl_commit(outvp, outoff, *ap->a_lenp,
|
|
ap->a_outcred, curthread);
|
|
if (error == 0 && ret != 0)
|
|
error = ret;
|
|
if (error == 0 && ret2 != 0)
|
|
error = ret2;
|
|
} else if (error == NFSERR_OFFLOADNOREQS && consecutive) {
|
|
/*
|
|
* Try consecutive == false, which is ok only if all
|
|
* bytes are copied.
|
|
* If only some bytes were copied when consecutive
|
|
* is false, there is no way to know which bytes
|
|
* still need to be written.
|
|
*/
|
|
consecutive = false;
|
|
error = 0;
|
|
} else if (error == NFSERR_ACCES && tryoutcred) {
|
|
/* Try again with incred. */
|
|
tryoutcred = false;
|
|
error = 0;
|
|
}
|
|
if (error == NFSERR_STALEWRITEVERF) {
|
|
/*
|
|
* Server rebooted, so do it all again.
|
|
*/
|
|
*ap->a_inoffp = inoff;
|
|
*ap->a_outoffp = outoff;
|
|
len = *ap->a_lenp;
|
|
must_commit = false;
|
|
error = 0;
|
|
}
|
|
}
|
|
VOP_UNLOCK(invp);
|
|
VOP_UNLOCK(outvp);
|
|
if (mp != NULL)
|
|
vn_finished_write(mp);
|
|
if (error == NFSERR_NOTSUPP || error == NFSERR_OFFLOADNOREQS ||
|
|
error == NFSERR_ACCES) {
|
|
/*
|
|
* Unlike the NFSv4.2 Copy, vn_generic_copy_file_range() can
|
|
* use a_incred for the read and a_outcred for the write, so
|
|
* try this for NFSERR_ACCES failures for the Copy.
|
|
* For NFSERR_NOTSUPP and NFSERR_OFFLOADNOREQS, the Copy can
|
|
* never succeed, so disable it.
|
|
*/
|
|
if (error != NFSERR_ACCES) {
|
|
/* Can never do Copy on this mount. */
|
|
mtx_lock(&nmp->nm_mtx);
|
|
nmp->nm_privflag |= NFSMNTP_NOCOPY;
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
}
|
|
*ap->a_inoffp = inoff;
|
|
*ap->a_outoffp = outoff;
|
|
error = vn_generic_copy_file_range(ap->a_invp, ap->a_inoffp,
|
|
ap->a_outvp, ap->a_outoffp, ap->a_lenp, ap->a_flags,
|
|
ap->a_incred, ap->a_outcred, ap->a_fsizetd);
|
|
} else if (error != 0)
|
|
*ap->a_lenp = 0;
|
|
|
|
if (error != 0)
|
|
error = nfscl_maperr(curthread, error, (uid_t)0, (gid_t)0);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* nfs ioctl call
|
|
*/
|
|
static int
|
|
nfs_ioctl(struct vop_ioctl_args *ap)
|
|
{
|
|
struct vnode *vp = ap->a_vp;
|
|
struct nfsvattr nfsva;
|
|
struct nfsmount *nmp;
|
|
int attrflag, content, error, ret;
|
|
bool eof = false; /* shut up compiler. */
|
|
|
|
/* Do the actual NFSv4.2 RPC. */
|
|
switch (ap->a_command) {
|
|
case FIOSEEKDATA:
|
|
content = NFSV4CONTENT_DATA;
|
|
break;
|
|
case FIOSEEKHOLE:
|
|
content = NFSV4CONTENT_HOLE;
|
|
break;
|
|
default:
|
|
return (ENOTTY);
|
|
}
|
|
|
|
error = vn_lock(vp, LK_SHARED);
|
|
if (error != 0)
|
|
return (EBADF);
|
|
|
|
if (vp->v_type != VREG) {
|
|
VOP_UNLOCK(vp);
|
|
return (ENOTTY);
|
|
}
|
|
nmp = VFSTONFS(vp->v_mount);
|
|
if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION) {
|
|
VOP_UNLOCK(vp);
|
|
error = vop_stdioctl(ap);
|
|
return (error);
|
|
}
|
|
|
|
attrflag = 0;
|
|
if (*((off_t *)ap->a_data) >= VTONFS(vp)->n_size)
|
|
error = ENXIO;
|
|
else {
|
|
/*
|
|
* Flush all writes, so that the server is up to date.
|
|
* Although a Commit is not required, the commit argument
|
|
* is set so that, for a pNFS File/Flexible File Layout
|
|
* server, the LayoutCommit will be done to ensure the file
|
|
* size is up to date on the Metadata Server.
|
|
*/
|
|
error = ncl_flush(vp, MNT_WAIT, ap->a_td, 1, 0);
|
|
if (error == 0)
|
|
error = nfsrpc_seek(vp, (off_t *)ap->a_data, &eof,
|
|
content, ap->a_cred, &nfsva, &attrflag);
|
|
/* If at eof for FIOSEEKDATA, return ENXIO. */
|
|
if (eof && error == 0 && content == NFSV4CONTENT_DATA)
|
|
error = ENXIO;
|
|
}
|
|
if (attrflag != 0) {
|
|
ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1);
|
|
if (error == 0 && ret != 0)
|
|
error = ret;
|
|
}
|
|
NFSVOPUNLOCK(vp);
|
|
|
|
if (error != 0)
|
|
error = ENXIO;
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* nfs getextattr call
|
|
*/
|
|
static int
|
|
nfs_getextattr(struct vop_getextattr_args *ap)
|
|
{
|
|
struct vnode *vp = ap->a_vp;
|
|
struct nfsmount *nmp;
|
|
struct ucred *cred;
|
|
struct thread *td = ap->a_td;
|
|
struct nfsvattr nfsva;
|
|
ssize_t len;
|
|
int attrflag, error, ret;
|
|
|
|
nmp = VFSTONFS(vp->v_mount);
|
|
mtx_lock(&nmp->nm_mtx);
|
|
if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION ||
|
|
(nmp->nm_privflag & NFSMNTP_NOXATTR) != 0 ||
|
|
ap->a_attrnamespace != EXTATTR_NAMESPACE_USER) {
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
return (EOPNOTSUPP);
|
|
}
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
|
|
cred = ap->a_cred;
|
|
if (cred == NULL)
|
|
cred = td->td_ucred;
|
|
/* Do the actual NFSv4.2 Optional Extended Attribute (RFC-8276) RPC. */
|
|
attrflag = 0;
|
|
error = nfsrpc_getextattr(vp, ap->a_name, ap->a_uio, &len, &nfsva,
|
|
&attrflag, cred, td);
|
|
if (attrflag != 0) {
|
|
ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1);
|
|
if (error == 0 && ret != 0)
|
|
error = ret;
|
|
}
|
|
if (error == 0 && ap->a_size != NULL)
|
|
*ap->a_size = len;
|
|
|
|
switch (error) {
|
|
case NFSERR_NOTSUPP:
|
|
case NFSERR_OPILLEGAL:
|
|
mtx_lock(&nmp->nm_mtx);
|
|
nmp->nm_privflag |= NFSMNTP_NOXATTR;
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
error = EOPNOTSUPP;
|
|
break;
|
|
case NFSERR_NOXATTR:
|
|
case NFSERR_XATTR2BIG:
|
|
error = ENOATTR;
|
|
break;
|
|
default:
|
|
error = nfscl_maperr(td, error, 0, 0);
|
|
break;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* nfs setextattr call
|
|
*/
|
|
static int
|
|
nfs_setextattr(struct vop_setextattr_args *ap)
|
|
{
|
|
struct vnode *vp = ap->a_vp;
|
|
struct nfsmount *nmp;
|
|
struct ucred *cred;
|
|
struct thread *td = ap->a_td;
|
|
struct nfsvattr nfsva;
|
|
int attrflag, error, ret;
|
|
|
|
nmp = VFSTONFS(vp->v_mount);
|
|
mtx_lock(&nmp->nm_mtx);
|
|
if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION ||
|
|
(nmp->nm_privflag & NFSMNTP_NOXATTR) != 0 ||
|
|
ap->a_attrnamespace != EXTATTR_NAMESPACE_USER) {
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
return (EOPNOTSUPP);
|
|
}
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
|
|
if (ap->a_uio->uio_resid < 0)
|
|
return (EINVAL);
|
|
cred = ap->a_cred;
|
|
if (cred == NULL)
|
|
cred = td->td_ucred;
|
|
/* Do the actual NFSv4.2 Optional Extended Attribute (RFC-8276) RPC. */
|
|
attrflag = 0;
|
|
error = nfsrpc_setextattr(vp, ap->a_name, ap->a_uio, &nfsva,
|
|
&attrflag, cred, td);
|
|
if (attrflag != 0) {
|
|
ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1);
|
|
if (error == 0 && ret != 0)
|
|
error = ret;
|
|
}
|
|
|
|
switch (error) {
|
|
case NFSERR_NOTSUPP:
|
|
case NFSERR_OPILLEGAL:
|
|
mtx_lock(&nmp->nm_mtx);
|
|
nmp->nm_privflag |= NFSMNTP_NOXATTR;
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
error = EOPNOTSUPP;
|
|
break;
|
|
case NFSERR_NOXATTR:
|
|
case NFSERR_XATTR2BIG:
|
|
error = ENOATTR;
|
|
break;
|
|
default:
|
|
error = nfscl_maperr(td, error, 0, 0);
|
|
break;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* nfs listextattr call
|
|
*/
|
|
static int
|
|
nfs_listextattr(struct vop_listextattr_args *ap)
|
|
{
|
|
struct vnode *vp = ap->a_vp;
|
|
struct nfsmount *nmp;
|
|
struct ucred *cred;
|
|
struct thread *td = ap->a_td;
|
|
struct nfsvattr nfsva;
|
|
size_t len, len2;
|
|
uint64_t cookie;
|
|
int attrflag, error, ret;
|
|
bool eof;
|
|
|
|
nmp = VFSTONFS(vp->v_mount);
|
|
mtx_lock(&nmp->nm_mtx);
|
|
if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION ||
|
|
(nmp->nm_privflag & NFSMNTP_NOXATTR) != 0 ||
|
|
ap->a_attrnamespace != EXTATTR_NAMESPACE_USER) {
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
return (EOPNOTSUPP);
|
|
}
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
|
|
cred = ap->a_cred;
|
|
if (cred == NULL)
|
|
cred = td->td_ucred;
|
|
|
|
/* Loop around doing List Extended Attribute RPCs. */
|
|
eof = false;
|
|
cookie = 0;
|
|
len2 = 0;
|
|
error = 0;
|
|
while (!eof && error == 0) {
|
|
len = nmp->nm_rsize;
|
|
attrflag = 0;
|
|
error = nfsrpc_listextattr(vp, &cookie, ap->a_uio, &len, &eof,
|
|
&nfsva, &attrflag, cred, td);
|
|
if (attrflag != 0) {
|
|
ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1);
|
|
if (error == 0 && ret != 0)
|
|
error = ret;
|
|
}
|
|
if (error == 0) {
|
|
len2 += len;
|
|
if (len2 > SSIZE_MAX)
|
|
error = ENOATTR;
|
|
}
|
|
}
|
|
if (error == 0 && ap->a_size != NULL)
|
|
*ap->a_size = len2;
|
|
|
|
switch (error) {
|
|
case NFSERR_NOTSUPP:
|
|
case NFSERR_OPILLEGAL:
|
|
mtx_lock(&nmp->nm_mtx);
|
|
nmp->nm_privflag |= NFSMNTP_NOXATTR;
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
error = EOPNOTSUPP;
|
|
break;
|
|
case NFSERR_NOXATTR:
|
|
case NFSERR_XATTR2BIG:
|
|
error = ENOATTR;
|
|
break;
|
|
default:
|
|
error = nfscl_maperr(td, error, 0, 0);
|
|
break;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* nfs setextattr call
|
|
*/
|
|
static int
|
|
nfs_deleteextattr(struct vop_deleteextattr_args *ap)
|
|
{
|
|
struct vnode *vp = ap->a_vp;
|
|
struct nfsmount *nmp;
|
|
struct nfsvattr nfsva;
|
|
int attrflag, error, ret;
|
|
|
|
nmp = VFSTONFS(vp->v_mount);
|
|
mtx_lock(&nmp->nm_mtx);
|
|
if (!NFSHASNFSV4(nmp) || nmp->nm_minorvers < NFSV42_MINORVERSION ||
|
|
(nmp->nm_privflag & NFSMNTP_NOXATTR) != 0 ||
|
|
ap->a_attrnamespace != EXTATTR_NAMESPACE_USER) {
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
return (EOPNOTSUPP);
|
|
}
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
|
|
/* Do the actual NFSv4.2 Optional Extended Attribute (RFC-8276) RPC. */
|
|
attrflag = 0;
|
|
error = nfsrpc_rmextattr(vp, ap->a_name, &nfsva, &attrflag, ap->a_cred,
|
|
ap->a_td);
|
|
if (attrflag != 0) {
|
|
ret = nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1);
|
|
if (error == 0 && ret != 0)
|
|
error = ret;
|
|
}
|
|
|
|
switch (error) {
|
|
case NFSERR_NOTSUPP:
|
|
case NFSERR_OPILLEGAL:
|
|
mtx_lock(&nmp->nm_mtx);
|
|
nmp->nm_privflag |= NFSMNTP_NOXATTR;
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
error = EOPNOTSUPP;
|
|
break;
|
|
case NFSERR_NOXATTR:
|
|
case NFSERR_XATTR2BIG:
|
|
error = ENOATTR;
|
|
break;
|
|
default:
|
|
error = nfscl_maperr(ap->a_td, error, 0, 0);
|
|
break;
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Return POSIX pathconf information applicable to nfs filesystems.
|
|
*/
|
|
static int
|
|
nfs_pathconf(struct vop_pathconf_args *ap)
|
|
{
|
|
struct nfsv3_pathconf pc;
|
|
struct nfsvattr nfsva;
|
|
struct vnode *vp = ap->a_vp;
|
|
struct nfsmount *nmp;
|
|
struct thread *td = curthread;
|
|
off_t off;
|
|
bool eof;
|
|
int attrflag, error;
|
|
|
|
if ((NFS_ISV34(vp) && (ap->a_name == _PC_LINK_MAX ||
|
|
ap->a_name == _PC_NAME_MAX || ap->a_name == _PC_CHOWN_RESTRICTED ||
|
|
ap->a_name == _PC_NO_TRUNC)) ||
|
|
(NFS_ISV4(vp) && ap->a_name == _PC_ACL_NFS4)) {
|
|
/*
|
|
* Since only the above 4 a_names are returned by the NFSv3
|
|
* Pathconf RPC, there is no point in doing it for others.
|
|
* For NFSv4, the Pathconf RPC (actually a Getattr Op.) can
|
|
* be used for _PC_NFS4_ACL as well.
|
|
*/
|
|
error = nfsrpc_pathconf(vp, &pc, td->td_ucred, td, &nfsva,
|
|
&attrflag);
|
|
if (attrflag != 0)
|
|
(void) nfscl_loadattrcache(&vp, &nfsva, NULL, 0, 1);
|
|
if (error != 0)
|
|
return (error);
|
|
} else {
|
|
/*
|
|
* For NFSv2 (or NFSv3 when not one of the above 4 a_names),
|
|
* just fake them.
|
|
*/
|
|
pc.pc_linkmax = NFS_LINK_MAX;
|
|
pc.pc_namemax = NFS_MAXNAMLEN;
|
|
pc.pc_notrunc = 1;
|
|
pc.pc_chownrestricted = 1;
|
|
pc.pc_caseinsensitive = 0;
|
|
pc.pc_casepreserving = 1;
|
|
error = 0;
|
|
}
|
|
switch (ap->a_name) {
|
|
case _PC_LINK_MAX:
|
|
#ifdef _LP64
|
|
*ap->a_retval = pc.pc_linkmax;
|
|
#else
|
|
*ap->a_retval = MIN(LONG_MAX, pc.pc_linkmax);
|
|
#endif
|
|
break;
|
|
case _PC_NAME_MAX:
|
|
*ap->a_retval = pc.pc_namemax;
|
|
break;
|
|
case _PC_PIPE_BUF:
|
|
if (ap->a_vp->v_type == VDIR || ap->a_vp->v_type == VFIFO)
|
|
*ap->a_retval = PIPE_BUF;
|
|
else
|
|
error = EINVAL;
|
|
break;
|
|
case _PC_CHOWN_RESTRICTED:
|
|
*ap->a_retval = pc.pc_chownrestricted;
|
|
break;
|
|
case _PC_NO_TRUNC:
|
|
*ap->a_retval = pc.pc_notrunc;
|
|
break;
|
|
case _PC_ACL_NFS4:
|
|
if (NFS_ISV4(vp) && nfsrv_useacl != 0 && attrflag != 0 &&
|
|
NFSISSET_ATTRBIT(&nfsva.na_suppattr, NFSATTRBIT_ACL))
|
|
*ap->a_retval = 1;
|
|
else
|
|
*ap->a_retval = 0;
|
|
break;
|
|
case _PC_ACL_PATH_MAX:
|
|
if (NFS_ISV4(vp))
|
|
*ap->a_retval = ACL_MAX_ENTRIES;
|
|
else
|
|
*ap->a_retval = 3;
|
|
break;
|
|
case _PC_PRIO_IO:
|
|
*ap->a_retval = 0;
|
|
break;
|
|
case _PC_SYNC_IO:
|
|
*ap->a_retval = 0;
|
|
break;
|
|
case _PC_ALLOC_SIZE_MIN:
|
|
*ap->a_retval = vp->v_mount->mnt_stat.f_bsize;
|
|
break;
|
|
case _PC_FILESIZEBITS:
|
|
if (NFS_ISV34(vp))
|
|
*ap->a_retval = 64;
|
|
else
|
|
*ap->a_retval = 32;
|
|
break;
|
|
case _PC_REC_INCR_XFER_SIZE:
|
|
*ap->a_retval = vp->v_mount->mnt_stat.f_iosize;
|
|
break;
|
|
case _PC_REC_MAX_XFER_SIZE:
|
|
*ap->a_retval = -1; /* means ``unlimited'' */
|
|
break;
|
|
case _PC_REC_MIN_XFER_SIZE:
|
|
*ap->a_retval = vp->v_mount->mnt_stat.f_iosize;
|
|
break;
|
|
case _PC_REC_XFER_ALIGN:
|
|
*ap->a_retval = PAGE_SIZE;
|
|
break;
|
|
case _PC_SYMLINK_MAX:
|
|
*ap->a_retval = NFS_MAXPATHLEN;
|
|
break;
|
|
case _PC_MIN_HOLE_SIZE:
|
|
/* Only some NFSv4.2 servers support Seek for Holes. */
|
|
*ap->a_retval = 0;
|
|
nmp = VFSTONFS(vp->v_mount);
|
|
if (NFS_ISV4(vp) && nmp->nm_minorvers == NFSV42_MINORVERSION) {
|
|
/*
|
|
* NFSv4.2 doesn't have an attribute for hole size,
|
|
* so all we can do is see if the Seek operation is
|
|
* supported and then use f_iosize as a "best guess".
|
|
*/
|
|
mtx_lock(&nmp->nm_mtx);
|
|
if ((nmp->nm_privflag & NFSMNTP_SEEKTESTED) == 0) {
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
off = 0;
|
|
attrflag = 0;
|
|
error = nfsrpc_seek(vp, &off, &eof,
|
|
NFSV4CONTENT_HOLE, td->td_ucred, &nfsva,
|
|
&attrflag);
|
|
if (attrflag != 0)
|
|
(void) nfscl_loadattrcache(&vp, &nfsva,
|
|
NULL, 0, 1);
|
|
mtx_lock(&nmp->nm_mtx);
|
|
if (error == NFSERR_NOTSUPP)
|
|
nmp->nm_privflag |= NFSMNTP_SEEKTESTED;
|
|
else
|
|
nmp->nm_privflag |= NFSMNTP_SEEKTESTED |
|
|
NFSMNTP_SEEK;
|
|
error = 0;
|
|
}
|
|
if ((nmp->nm_privflag & NFSMNTP_SEEK) != 0)
|
|
*ap->a_retval = vp->v_mount->mnt_stat.f_iosize;
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
error = vop_stdpathconf(ap);
|
|
break;
|
|
}
|
|
return (error);
|
|
}
|