1494 lines
40 KiB
C
1494 lines
40 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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*/
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#include <sys/cdefs.h>
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#include "opt_inet.h"
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#include "opt_inet6.h"
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#include <sys/capsicum.h>
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/*
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* generally, I don't like #includes inside .h files, but it seems to
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* be the easiest way to handle the port.
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*/
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#include <sys/fail.h>
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#include <sys/hash.h>
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#include <sys/sysctl.h>
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#include <fs/nfs/nfsport.h>
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#include <netinet/in_fib.h>
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#include <netinet/if_ether.h>
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#include <netinet6/ip6_var.h>
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#include <net/if_types.h>
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#include <net/route/nhop.h>
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#include <fs/nfsclient/nfs_kdtrace.h>
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#ifdef KDTRACE_HOOKS
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dtrace_nfsclient_attrcache_flush_probe_func_t
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dtrace_nfscl_attrcache_flush_done_probe;
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uint32_t nfscl_attrcache_flush_done_id;
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dtrace_nfsclient_attrcache_get_hit_probe_func_t
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dtrace_nfscl_attrcache_get_hit_probe;
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uint32_t nfscl_attrcache_get_hit_id;
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dtrace_nfsclient_attrcache_get_miss_probe_func_t
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dtrace_nfscl_attrcache_get_miss_probe;
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uint32_t nfscl_attrcache_get_miss_id;
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dtrace_nfsclient_attrcache_load_probe_func_t
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dtrace_nfscl_attrcache_load_done_probe;
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uint32_t nfscl_attrcache_load_done_id;
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#endif /* !KDTRACE_HOOKS */
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extern u_int32_t newnfs_true, newnfs_false, newnfs_xdrneg1;
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extern struct vop_vector newnfs_vnodeops;
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extern struct vop_vector newnfs_fifoops;
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extern uma_zone_t newnfsnode_zone;
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extern struct buf_ops buf_ops_newnfs;
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extern uma_zone_t ncl_pbuf_zone;
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extern short nfsv4_cbport;
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extern int nfscl_enablecallb;
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extern int nfs_numnfscbd;
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extern int nfscl_inited;
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struct mtx ncl_iod_mutex;
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NFSDLOCKMUTEX;
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extern struct mtx nfsrv_dslock_mtx;
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extern void (*ncl_call_invalcaches)(struct vnode *);
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SYSCTL_DECL(_vfs_nfs);
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static int ncl_fileid_maxwarnings = 10;
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SYSCTL_INT(_vfs_nfs, OID_AUTO, fileid_maxwarnings, CTLFLAG_RWTUN,
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&ncl_fileid_maxwarnings, 0,
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"Limit fileid corruption warnings; 0 is off; -1 is unlimited");
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static volatile int ncl_fileid_nwarnings;
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static void nfscl_warn_fileid(struct nfsmount *, struct nfsvattr *,
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struct nfsvattr *);
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/*
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* Comparison function for vfs_hash functions.
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*/
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int
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newnfs_vncmpf(struct vnode *vp, void *arg)
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{
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struct nfsfh *nfhp = (struct nfsfh *)arg;
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struct nfsnode *np = VTONFS(vp);
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if (np->n_fhp->nfh_len != nfhp->nfh_len ||
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NFSBCMP(np->n_fhp->nfh_fh, nfhp->nfh_fh, nfhp->nfh_len))
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return (1);
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return (0);
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}
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/*
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* Look up a vnode/nfsnode by file handle.
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* Callers must check for mount points!!
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* In all cases, a pointer to a
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* nfsnode structure is returned.
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* This variant takes a "struct nfsfh *" as second argument and uses
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* that structure up, either by hanging off the nfsnode or FREEing it.
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*/
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int
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nfscl_nget(struct mount *mntp, struct vnode *dvp, struct nfsfh *nfhp,
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struct componentname *cnp, struct thread *td, struct nfsnode **npp,
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int lkflags)
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{
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struct nfsnode *np, *dnp;
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struct vnode *vp, *nvp;
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struct nfsv4node *newd, *oldd;
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int error;
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u_int hash;
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struct nfsmount *nmp;
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nmp = VFSTONFS(mntp);
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dnp = VTONFS(dvp);
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*npp = NULL;
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/*
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* If this is the mount point fh and NFSMNTP_FAKEROOT is set, replace
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* it with the fake fh.
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*/
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if ((nmp->nm_privflag & NFSMNTP_FAKEROOTFH) != 0 &&
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nmp->nm_fhsize > 0 && nmp->nm_fhsize == nfhp->nfh_len &&
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!NFSBCMP(nmp->nm_fh, nfhp->nfh_fh, nmp->nm_fhsize)) {
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free(nfhp, M_NFSFH);
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nfhp = malloc(sizeof(struct nfsfh) + NFSX_FHMAX + 1,
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M_NFSFH, M_WAITOK | M_ZERO);
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nfhp->nfh_len = NFSX_FHMAX + 1;
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}
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hash = fnv_32_buf(nfhp->nfh_fh, nfhp->nfh_len, FNV1_32_INIT);
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error = vfs_hash_get(mntp, hash, lkflags,
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td, &nvp, newnfs_vncmpf, nfhp);
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if (error == 0 && nvp != NULL) {
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/*
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* I believe there is a slight chance that vgonel() could
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* get called on this vnode between when NFSVOPLOCK() drops
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* the VI_LOCK() and vget() acquires it again, so that it
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* hasn't yet had v_usecount incremented. If this were to
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* happen, the VIRF_DOOMED flag would be set, so check for
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* that here. Since we now have the v_usecount incremented,
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* we should be ok until we vrele() it, if the VIRF_DOOMED
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* flag isn't set now.
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*/
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VI_LOCK(nvp);
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if (VN_IS_DOOMED(nvp)) {
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VI_UNLOCK(nvp);
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vrele(nvp);
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error = ENOENT;
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} else {
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VI_UNLOCK(nvp);
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}
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}
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if (error) {
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free(nfhp, M_NFSFH);
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return (error);
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}
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if (nvp != NULL) {
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np = VTONFS(nvp);
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/*
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* For NFSv4, check to see if it is the same name and
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* replace the name, if it is different.
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*/
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oldd = newd = NULL;
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if ((nmp->nm_flag & NFSMNT_NFSV4) && np->n_v4 != NULL &&
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nvp->v_type == VREG &&
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(np->n_v4->n4_namelen != cnp->cn_namelen ||
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NFSBCMP(cnp->cn_nameptr, NFS4NODENAME(np->n_v4),
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cnp->cn_namelen) ||
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dnp->n_fhp->nfh_len != np->n_v4->n4_fhlen ||
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NFSBCMP(dnp->n_fhp->nfh_fh, np->n_v4->n4_data,
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dnp->n_fhp->nfh_len))) {
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newd = malloc(
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sizeof (struct nfsv4node) + dnp->n_fhp->nfh_len +
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+ cnp->cn_namelen - 1, M_NFSV4NODE, M_WAITOK);
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NFSLOCKNODE(np);
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if (newd != NULL && np->n_v4 != NULL && nvp->v_type == VREG
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&& (np->n_v4->n4_namelen != cnp->cn_namelen ||
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NFSBCMP(cnp->cn_nameptr, NFS4NODENAME(np->n_v4),
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cnp->cn_namelen) ||
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dnp->n_fhp->nfh_len != np->n_v4->n4_fhlen ||
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NFSBCMP(dnp->n_fhp->nfh_fh, np->n_v4->n4_data,
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dnp->n_fhp->nfh_len))) {
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oldd = np->n_v4;
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np->n_v4 = newd;
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newd = NULL;
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np->n_v4->n4_fhlen = dnp->n_fhp->nfh_len;
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np->n_v4->n4_namelen = cnp->cn_namelen;
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NFSBCOPY(dnp->n_fhp->nfh_fh, np->n_v4->n4_data,
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dnp->n_fhp->nfh_len);
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NFSBCOPY(cnp->cn_nameptr, NFS4NODENAME(np->n_v4),
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cnp->cn_namelen);
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}
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NFSUNLOCKNODE(np);
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}
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if (newd != NULL)
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free(newd, M_NFSV4NODE);
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if (oldd != NULL)
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free(oldd, M_NFSV4NODE);
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*npp = np;
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free(nfhp, M_NFSFH);
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return (0);
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}
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np = uma_zalloc(newnfsnode_zone, M_WAITOK | M_ZERO);
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error = getnewvnode(nfs_vnode_tag, mntp, &newnfs_vnodeops, &nvp);
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if (error) {
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uma_zfree(newnfsnode_zone, np);
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free(nfhp, M_NFSFH);
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return (error);
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}
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vp = nvp;
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KASSERT(vp->v_bufobj.bo_bsize != 0, ("nfscl_nget: bo_bsize == 0"));
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vp->v_bufobj.bo_ops = &buf_ops_newnfs;
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vp->v_data = np;
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np->n_vnode = vp;
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/*
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* Initialize the mutex even if the vnode is going to be a loser.
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* This simplifies the logic in reclaim, which can then unconditionally
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* destroy the mutex (in the case of the loser, or if hash_insert
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* happened to return an error no special casing is needed).
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*/
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mtx_init(&np->n_mtx, "NEWNFSnode lock", NULL, MTX_DEF | MTX_DUPOK);
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lockinit(&np->n_excl, PVFS, "nfsupg", VLKTIMEOUT, LK_NOSHARE |
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LK_CANRECURSE);
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/*
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* Are we getting the root? If so, make sure the vnode flags
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* are correct
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*/
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if (nfhp->nfh_len == NFSX_FHMAX + 1 ||
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(nfhp->nfh_len == nmp->nm_fhsize &&
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!bcmp(nfhp->nfh_fh, nmp->nm_fh, nfhp->nfh_len))) {
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if (vp->v_type == VNON)
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vp->v_type = VDIR;
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vp->v_vflag |= VV_ROOT;
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}
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vp->v_vflag |= VV_VMSIZEVNLOCK;
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np->n_fhp = nfhp;
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/*
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* For NFSv4, we have to attach the directory file handle and
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* file name, so that Open Ops can be done later.
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*/
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if (nmp->nm_flag & NFSMNT_NFSV4) {
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np->n_v4 = malloc(sizeof (struct nfsv4node)
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+ dnp->n_fhp->nfh_len + cnp->cn_namelen - 1, M_NFSV4NODE,
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M_WAITOK);
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np->n_v4->n4_fhlen = dnp->n_fhp->nfh_len;
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np->n_v4->n4_namelen = cnp->cn_namelen;
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NFSBCOPY(dnp->n_fhp->nfh_fh, np->n_v4->n4_data,
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dnp->n_fhp->nfh_len);
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NFSBCOPY(cnp->cn_nameptr, NFS4NODENAME(np->n_v4),
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cnp->cn_namelen);
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} else {
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np->n_v4 = NULL;
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}
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/*
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* NFS supports recursive and shared locking.
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*/
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lockmgr(vp->v_vnlock, LK_EXCLUSIVE | LK_NOWITNESS, NULL);
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VN_LOCK_AREC(vp);
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VN_LOCK_ASHARE(vp);
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error = insmntque(vp, mntp);
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if (error != 0) {
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*npp = NULL;
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mtx_destroy(&np->n_mtx);
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lockdestroy(&np->n_excl);
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free(nfhp, M_NFSFH);
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if (np->n_v4 != NULL)
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free(np->n_v4, M_NFSV4NODE);
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uma_zfree(newnfsnode_zone, np);
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return (error);
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}
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vn_set_state(vp, VSTATE_CONSTRUCTED);
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error = vfs_hash_insert(vp, hash, lkflags,
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td, &nvp, newnfs_vncmpf, nfhp);
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if (error)
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return (error);
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if (nvp != NULL) {
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*npp = VTONFS(nvp);
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/* vfs_hash_insert() vput()'s the losing vnode */
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return (0);
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}
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*npp = np;
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return (0);
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}
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/*
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* Another variant of nfs_nget(). This one is only used by reopen. It
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* takes almost the same args as nfs_nget(), but only succeeds if an entry
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* exists in the cache. (Since files should already be "open" with a
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* vnode ref cnt on the node when reopen calls this, it should always
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* succeed.)
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* Also, don't get a vnode lock, since it may already be locked by some
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* other process that is handling it. This is ok, since all other threads
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* on the client are blocked by the nfsc_lock being exclusively held by the
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* caller of this function.
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*/
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int
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nfscl_ngetreopen(struct mount *mntp, u_int8_t *fhp, int fhsize,
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struct thread *td, struct nfsnode **npp)
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{
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struct vnode *nvp;
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u_int hash;
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struct nfsfh *nfhp;
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int error;
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*npp = NULL;
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/* For forced dismounts, just return error. */
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if (NFSCL_FORCEDISM(mntp))
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return (EINTR);
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nfhp = malloc(sizeof (struct nfsfh) + fhsize,
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M_NFSFH, M_WAITOK);
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bcopy(fhp, &nfhp->nfh_fh[0], fhsize);
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nfhp->nfh_len = fhsize;
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hash = fnv_32_buf(fhp, fhsize, FNV1_32_INIT);
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/*
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* First, try to get the vnode locked, but don't block for the lock.
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*/
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error = vfs_hash_get(mntp, hash, (LK_EXCLUSIVE | LK_NOWAIT), td, &nvp,
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newnfs_vncmpf, nfhp);
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if (error == 0 && nvp != NULL) {
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NFSVOPUNLOCK(nvp);
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} else if (error == EBUSY) {
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/*
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* It is safe so long as a vflush() with
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* FORCECLOSE has not been done. Since the Renew thread is
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* stopped and the MNTK_UNMOUNTF flag is set before doing
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* a vflush() with FORCECLOSE, we should be ok here.
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*/
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if (NFSCL_FORCEDISM(mntp))
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error = EINTR;
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else {
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vfs_hash_ref(mntp, hash, td, &nvp, newnfs_vncmpf, nfhp);
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if (nvp == NULL) {
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error = ENOENT;
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} else if (VN_IS_DOOMED(nvp)) {
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error = ENOENT;
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vrele(nvp);
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} else {
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error = 0;
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}
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}
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}
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free(nfhp, M_NFSFH);
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if (error)
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return (error);
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if (nvp != NULL) {
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*npp = VTONFS(nvp);
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return (0);
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}
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return (EINVAL);
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}
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static void
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nfscl_warn_fileid(struct nfsmount *nmp, struct nfsvattr *oldnap,
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struct nfsvattr *newnap)
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{
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int off;
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if (ncl_fileid_maxwarnings >= 0 &&
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ncl_fileid_nwarnings >= ncl_fileid_maxwarnings)
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return;
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off = 0;
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if (ncl_fileid_maxwarnings >= 0) {
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if (++ncl_fileid_nwarnings >= ncl_fileid_maxwarnings)
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off = 1;
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}
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printf("newnfs: server '%s' error: fileid changed. "
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"fsid %jx:%jx: expected fileid %#jx, got %#jx. "
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"(BROKEN NFS SERVER OR MIDDLEWARE)\n",
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nmp->nm_com.nmcom_hostname,
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(uintmax_t)nmp->nm_fsid[0],
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(uintmax_t)nmp->nm_fsid[1],
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(uintmax_t)oldnap->na_fileid,
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(uintmax_t)newnap->na_fileid);
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if (off)
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printf("newnfs: Logged %d times about fileid corruption; "
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"going quiet to avoid spamming logs excessively. (Limit "
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"is: %d).\n", ncl_fileid_nwarnings,
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ncl_fileid_maxwarnings);
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}
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void
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ncl_copy_vattr(struct vattr *dst, struct vattr *src)
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{
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dst->va_type = src->va_type;
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dst->va_mode = src->va_mode;
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dst->va_nlink = src->va_nlink;
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dst->va_uid = src->va_uid;
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dst->va_gid = src->va_gid;
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dst->va_fsid = src->va_fsid;
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dst->va_fileid = src->va_fileid;
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dst->va_size = src->va_size;
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dst->va_blocksize = src->va_blocksize;
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dst->va_atime = src->va_atime;
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dst->va_mtime = src->va_mtime;
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dst->va_ctime = src->va_ctime;
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dst->va_birthtime = src->va_birthtime;
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dst->va_gen = src->va_gen;
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dst->va_flags = src->va_flags;
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dst->va_rdev = src->va_rdev;
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dst->va_bytes = src->va_bytes;
|
|
dst->va_filerev = src->va_filerev;
|
|
}
|
|
|
|
/*
|
|
* Load the attribute cache (that lives in the nfsnode entry) with
|
|
* the attributes of the second argument and
|
|
* Iff vaper not NULL
|
|
* copy the attributes to *vaper
|
|
* Similar to nfs_loadattrcache(), except the attributes are passed in
|
|
* instead of being parsed out of the mbuf list.
|
|
*/
|
|
int
|
|
nfscl_loadattrcache(struct vnode **vpp, struct nfsvattr *nap, void *nvaper,
|
|
int writeattr, int dontshrink)
|
|
{
|
|
struct vnode *vp = *vpp;
|
|
struct vattr *vap, *nvap = &nap->na_vattr, *vaper = nvaper;
|
|
struct nfsnode *np;
|
|
struct nfsmount *nmp;
|
|
struct timespec mtime_save;
|
|
int error, force_fid_err;
|
|
dev_t topfsid;
|
|
|
|
error = 0;
|
|
|
|
/*
|
|
* If v_type == VNON it is a new node, so fill in the v_type,
|
|
* n_mtime fields. Check to see if it represents a special
|
|
* device, and if so, check for a possible alias. Once the
|
|
* correct vnode has been obtained, fill in the rest of the
|
|
* information.
|
|
*/
|
|
np = VTONFS(vp);
|
|
NFSLOCKNODE(np);
|
|
if (vp->v_type != nvap->va_type) {
|
|
vp->v_type = nvap->va_type;
|
|
if (vp->v_type == VFIFO)
|
|
vp->v_op = &newnfs_fifoops;
|
|
np->n_mtime = nvap->va_mtime;
|
|
}
|
|
nmp = VFSTONFS(vp->v_mount);
|
|
vap = &np->n_vattr.na_vattr;
|
|
mtime_save = vap->va_mtime;
|
|
if (writeattr) {
|
|
np->n_vattr.na_filerev = nap->na_filerev;
|
|
np->n_vattr.na_size = nap->na_size;
|
|
np->n_vattr.na_mtime = nap->na_mtime;
|
|
np->n_vattr.na_ctime = nap->na_ctime;
|
|
np->n_vattr.na_btime = nap->na_btime;
|
|
np->n_vattr.na_fsid = nap->na_fsid;
|
|
np->n_vattr.na_mode = nap->na_mode;
|
|
} else {
|
|
force_fid_err = 0;
|
|
KFAIL_POINT_ERROR(DEBUG_FP, nfscl_force_fileid_warning,
|
|
force_fid_err);
|
|
/*
|
|
* BROKEN NFS SERVER OR MIDDLEWARE
|
|
*
|
|
* Certain NFS servers (certain old proprietary filers ca.
|
|
* 2006) or broken middleboxes (e.g. WAN accelerator products)
|
|
* will respond to GETATTR requests with results for a
|
|
* different fileid.
|
|
*
|
|
* The WAN accelerator we've observed not only serves stale
|
|
* cache results for a given file, it also occasionally serves
|
|
* results for wholly different files. This causes surprising
|
|
* problems; for example the cached size attribute of a file
|
|
* may truncate down and then back up, resulting in zero
|
|
* regions in file contents read by applications. We observed
|
|
* this reliably with Clang and .c files during parallel build.
|
|
* A pcap revealed packet fragmentation and GETATTR RPC
|
|
* responses with wholly wrong fileids.
|
|
* For the case where the file handle is a fake one
|
|
* generated via the "syskrb5" mount option and
|
|
* the old fileid is 2, ignore the test, since this might
|
|
* be replacing the fake attributes with correct ones.
|
|
*/
|
|
if ((np->n_vattr.na_fileid != 0 &&
|
|
np->n_vattr.na_fileid != nap->na_fileid &&
|
|
(np->n_vattr.na_fileid != 2 || !NFSHASSYSKRB5(nmp) ||
|
|
np->n_fhp->nfh_len != NFSX_FHMAX + 1)) ||
|
|
force_fid_err) {
|
|
nfscl_warn_fileid(nmp, &np->n_vattr, nap);
|
|
error = EIDRM;
|
|
goto out;
|
|
}
|
|
NFSBCOPY((caddr_t)nap, (caddr_t)&np->n_vattr,
|
|
sizeof (struct nfsvattr));
|
|
}
|
|
|
|
/*
|
|
* For NFSv4, the server's export may be a tree of file systems
|
|
* where a fileno is a unique value within each file system.
|
|
* na_filesid[0,1] uniquely identify the server file system
|
|
* and nm_fsid[0,1] is the value for the root file system mounted.
|
|
* As such, the value of va_fsid generated by vn_fsid() represents
|
|
* the root file system on the server and a different value for
|
|
* va_fsid is needed for the other server file systems. This
|
|
* va_fsid is ideally unique for all of the server file systems,
|
|
* so a 64bit hash on na_filesid[0,1] is calculated.
|
|
* Although highly unlikely that the fnv_64_hash() will be
|
|
* the same as the root, test for this case and recalculate the hash.
|
|
*/
|
|
vn_fsid(vp, vap);
|
|
if (NFSHASNFSV4(nmp) && NFSHASHASSETFSID(nmp) &&
|
|
(nmp->nm_fsid[0] != np->n_vattr.na_filesid[0] ||
|
|
nmp->nm_fsid[1] != np->n_vattr.na_filesid[1])) {
|
|
topfsid = vap->va_fsid;
|
|
vap->va_fsid = FNV1_64_INIT;
|
|
do {
|
|
vap->va_fsid = fnv_64_buf(np->n_vattr.na_filesid,
|
|
sizeof(np->n_vattr.na_filesid), vap->va_fsid);
|
|
} while (vap->va_fsid == topfsid);
|
|
}
|
|
|
|
np->n_attrstamp = time_second;
|
|
if (vap->va_size != np->n_size) {
|
|
if (vap->va_type == VREG) {
|
|
if (dontshrink && vap->va_size < np->n_size) {
|
|
/*
|
|
* We've been told not to shrink the file;
|
|
* zero np->n_attrstamp to indicate that
|
|
* the attributes are stale.
|
|
*/
|
|
vap->va_size = np->n_size;
|
|
np->n_attrstamp = 0;
|
|
KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
|
|
} else if (np->n_flag & NMODIFIED) {
|
|
/*
|
|
* We've modified the file: Use the larger
|
|
* of our size, and the server's size.
|
|
*/
|
|
if (vap->va_size < np->n_size) {
|
|
vap->va_size = np->n_size;
|
|
} else {
|
|
np->n_size = vap->va_size;
|
|
np->n_flag |= NSIZECHANGED;
|
|
}
|
|
} else {
|
|
np->n_size = vap->va_size;
|
|
np->n_flag |= NSIZECHANGED;
|
|
}
|
|
} else {
|
|
np->n_size = vap->va_size;
|
|
}
|
|
}
|
|
/*
|
|
* The following checks are added to prevent a race between (say)
|
|
* a READDIR+ and a WRITE.
|
|
* READDIR+, WRITE requests sent out.
|
|
* READDIR+ resp, WRITE resp received on client.
|
|
* However, the WRITE resp was handled before the READDIR+ resp
|
|
* causing the post op attrs from the write to be loaded first
|
|
* and the attrs from the READDIR+ to be loaded later. If this
|
|
* happens, we have stale attrs loaded into the attrcache.
|
|
* We detect this by for the mtime moving back. We invalidate the
|
|
* attrcache when this happens.
|
|
*/
|
|
if (timespeccmp(&mtime_save, &vap->va_mtime, >)) {
|
|
/* Size changed or mtime went backwards */
|
|
np->n_attrstamp = 0;
|
|
KDTRACE_NFS_ATTRCACHE_FLUSH_DONE(vp);
|
|
}
|
|
if (vaper != NULL) {
|
|
ncl_copy_vattr(vaper, vap);
|
|
if (np->n_flag & NCHG) {
|
|
if (np->n_flag & NACC)
|
|
vaper->va_atime = np->n_atim;
|
|
if (np->n_flag & NUPD)
|
|
vaper->va_mtime = np->n_mtim;
|
|
}
|
|
}
|
|
|
|
out:
|
|
#ifdef KDTRACE_HOOKS
|
|
if (np->n_attrstamp != 0)
|
|
KDTRACE_NFS_ATTRCACHE_LOAD_DONE(vp, vap, error);
|
|
#endif
|
|
(void)ncl_pager_setsize(vp, NULL);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Call vnode_pager_setsize() if the size of the node changed, as
|
|
* recorded in nfsnode vs. v_object, or delay the call if notifying
|
|
* the pager is not possible at the moment.
|
|
*
|
|
* If nsizep is non-NULL, the call is delayed and the new node size is
|
|
* provided. Caller should itself call vnode_pager_setsize() if
|
|
* function returned true. If nsizep is NULL, function tries to call
|
|
* vnode_pager_setsize() itself if needed and possible, and the nfs
|
|
* node is unlocked unconditionally, the return value is not useful.
|
|
*/
|
|
bool
|
|
ncl_pager_setsize(struct vnode *vp, u_quad_t *nsizep)
|
|
{
|
|
struct nfsnode *np;
|
|
vm_object_t object;
|
|
struct vattr *vap;
|
|
u_quad_t nsize;
|
|
bool setnsize;
|
|
|
|
np = VTONFS(vp);
|
|
NFSASSERTNODE(np);
|
|
|
|
vap = &np->n_vattr.na_vattr;
|
|
nsize = vap->va_size;
|
|
object = vp->v_object;
|
|
setnsize = false;
|
|
|
|
if (object != NULL && nsize != object->un_pager.vnp.vnp_size) {
|
|
if (VOP_ISLOCKED(vp) == LK_EXCLUSIVE &&
|
|
(curthread->td_pflags2 & TDP2_SBPAGES) == 0)
|
|
setnsize = true;
|
|
else
|
|
np->n_flag |= NVNSETSZSKIP;
|
|
}
|
|
if (nsizep == NULL) {
|
|
NFSUNLOCKNODE(np);
|
|
if (setnsize)
|
|
vnode_pager_setsize(vp, nsize);
|
|
setnsize = false;
|
|
} else {
|
|
*nsizep = nsize;
|
|
}
|
|
return (setnsize);
|
|
}
|
|
|
|
/*
|
|
* Fill in the client id name. For these bytes:
|
|
* 1 - they must be unique
|
|
* 2 - they should be persistent across client reboots
|
|
* 1 is more critical than 2
|
|
* Use the mount point's unique id plus either the uuid or, if that
|
|
* isn't set, random junk.
|
|
*/
|
|
void
|
|
nfscl_fillclid(u_int64_t clval, char *uuid, u_int8_t *cp, u_int16_t idlen)
|
|
{
|
|
int uuidlen;
|
|
|
|
/*
|
|
* First, put in the 64bit mount point identifier.
|
|
*/
|
|
if (idlen >= sizeof (u_int64_t)) {
|
|
NFSBCOPY((caddr_t)&clval, cp, sizeof (u_int64_t));
|
|
cp += sizeof (u_int64_t);
|
|
idlen -= sizeof (u_int64_t);
|
|
}
|
|
|
|
/*
|
|
* If uuid is non-zero length, use it.
|
|
*/
|
|
uuidlen = strlen(uuid);
|
|
if (uuidlen > 0 && idlen >= uuidlen) {
|
|
NFSBCOPY(uuid, cp, uuidlen);
|
|
cp += uuidlen;
|
|
idlen -= uuidlen;
|
|
}
|
|
|
|
/*
|
|
* This only normally happens if the uuid isn't set.
|
|
*/
|
|
while (idlen > 0) {
|
|
*cp++ = (u_int8_t)(arc4random() % 256);
|
|
idlen--;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Fill in a lock owner name. For now, pid + the process's creation time.
|
|
*/
|
|
void
|
|
nfscl_filllockowner(void *id, u_int8_t *cp, int flags)
|
|
{
|
|
union {
|
|
u_int32_t lval;
|
|
u_int8_t cval[4];
|
|
} tl;
|
|
struct proc *p;
|
|
|
|
if (id == NULL) {
|
|
/* Return the single open_owner of all 0 bytes. */
|
|
bzero(cp, NFSV4CL_LOCKNAMELEN);
|
|
return;
|
|
}
|
|
if ((flags & F_POSIX) != 0) {
|
|
p = (struct proc *)id;
|
|
tl.lval = p->p_pid;
|
|
*cp++ = tl.cval[0];
|
|
*cp++ = tl.cval[1];
|
|
*cp++ = tl.cval[2];
|
|
*cp++ = tl.cval[3];
|
|
tl.lval = p->p_stats->p_start.tv_sec;
|
|
*cp++ = tl.cval[0];
|
|
*cp++ = tl.cval[1];
|
|
*cp++ = tl.cval[2];
|
|
*cp++ = tl.cval[3];
|
|
tl.lval = p->p_stats->p_start.tv_usec;
|
|
*cp++ = tl.cval[0];
|
|
*cp++ = tl.cval[1];
|
|
*cp++ = tl.cval[2];
|
|
*cp = tl.cval[3];
|
|
} else if ((flags & F_FLOCK) != 0) {
|
|
bcopy(&id, cp, sizeof(id));
|
|
bzero(&cp[sizeof(id)], NFSV4CL_LOCKNAMELEN - sizeof(id));
|
|
} else {
|
|
printf("nfscl_filllockowner: not F_POSIX or F_FLOCK\n");
|
|
bzero(cp, NFSV4CL_LOCKNAMELEN);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Find the parent process for the thread passed in as an argument.
|
|
* If none exists, return NULL, otherwise return a thread for the parent.
|
|
* (Can be any of the threads, since it is only used for td->td_proc.)
|
|
*/
|
|
NFSPROC_T *
|
|
nfscl_getparent(struct thread *td)
|
|
{
|
|
struct proc *p;
|
|
struct thread *ptd;
|
|
|
|
if (td == NULL)
|
|
return (NULL);
|
|
p = td->td_proc;
|
|
if (p->p_pid == 0)
|
|
return (NULL);
|
|
p = p->p_pptr;
|
|
if (p == NULL)
|
|
return (NULL);
|
|
ptd = TAILQ_FIRST(&p->p_threads);
|
|
return (ptd);
|
|
}
|
|
|
|
/*
|
|
* Start up the renew kernel thread.
|
|
*/
|
|
static void
|
|
start_nfscl(void *arg)
|
|
{
|
|
struct nfsclclient *clp;
|
|
struct thread *td;
|
|
|
|
clp = (struct nfsclclient *)arg;
|
|
td = TAILQ_FIRST(&clp->nfsc_renewthread->p_threads);
|
|
nfscl_renewthread(clp, td);
|
|
kproc_exit(0);
|
|
}
|
|
|
|
void
|
|
nfscl_start_renewthread(struct nfsclclient *clp)
|
|
{
|
|
|
|
kproc_create(start_nfscl, (void *)clp, &clp->nfsc_renewthread, 0, 0,
|
|
"nfscl");
|
|
}
|
|
|
|
/*
|
|
* Handle wcc_data.
|
|
* For NFSv4, it assumes that nfsv4_wccattr() was used to set up the getattr
|
|
* as the first Op after PutFH.
|
|
* (For NFSv4, the postop attributes are after the Op, so they can't be
|
|
* parsed here. A separate call to nfscl_postop_attr() is required.)
|
|
*/
|
|
int
|
|
nfscl_wcc_data(struct nfsrv_descript *nd, struct vnode *vp,
|
|
struct nfsvattr *nap, int *flagp, int *wccflagp, uint64_t *repsizep)
|
|
{
|
|
u_int32_t *tl;
|
|
struct nfsnode *np = VTONFS(vp);
|
|
struct nfsvattr nfsva;
|
|
int error = 0;
|
|
|
|
if (wccflagp != NULL)
|
|
*wccflagp = 0;
|
|
if (nd->nd_flag & ND_NFSV3) {
|
|
*flagp = 0;
|
|
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
|
|
if (*tl == newnfs_true) {
|
|
NFSM_DISSECT(tl, u_int32_t *, 6 * NFSX_UNSIGNED);
|
|
if (wccflagp != NULL) {
|
|
NFSLOCKNODE(np);
|
|
*wccflagp = (np->n_mtime.tv_sec ==
|
|
fxdr_unsigned(u_int32_t, *(tl + 2)) &&
|
|
np->n_mtime.tv_nsec ==
|
|
fxdr_unsigned(u_int32_t, *(tl + 3)));
|
|
NFSUNLOCKNODE(np);
|
|
}
|
|
}
|
|
error = nfscl_postop_attr(nd, nap, flagp);
|
|
if (wccflagp != NULL && *flagp == 0)
|
|
*wccflagp = 0;
|
|
} else if ((nd->nd_flag & (ND_NOMOREDATA | ND_NFSV4 | ND_V4WCCATTR))
|
|
== (ND_NFSV4 | ND_V4WCCATTR)) {
|
|
error = nfsv4_loadattr(nd, NULL, &nfsva, NULL,
|
|
NULL, 0, NULL, NULL, NULL, NULL, NULL, 0,
|
|
NULL, NULL, NULL, NULL, NULL);
|
|
if (error)
|
|
return (error);
|
|
/*
|
|
* Get rid of Op# and status for next op.
|
|
*/
|
|
NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
|
|
if (*++tl)
|
|
nd->nd_flag |= ND_NOMOREDATA;
|
|
if (repsizep != NULL)
|
|
*repsizep = nfsva.na_size;
|
|
if (wccflagp != NULL &&
|
|
nfsva.na_vattr.va_mtime.tv_sec != 0) {
|
|
NFSLOCKNODE(np);
|
|
*wccflagp = (np->n_mtime.tv_sec ==
|
|
nfsva.na_vattr.va_mtime.tv_sec &&
|
|
np->n_mtime.tv_nsec ==
|
|
nfsva.na_vattr.va_mtime.tv_sec);
|
|
NFSUNLOCKNODE(np);
|
|
}
|
|
}
|
|
nfsmout:
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Get postop attributes.
|
|
*/
|
|
int
|
|
nfscl_postop_attr(struct nfsrv_descript *nd, struct nfsvattr *nap, int *retp)
|
|
{
|
|
u_int32_t *tl;
|
|
int error = 0;
|
|
|
|
*retp = 0;
|
|
if (nd->nd_flag & ND_NOMOREDATA)
|
|
return (error);
|
|
if (nd->nd_flag & ND_NFSV3) {
|
|
NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
|
|
*retp = fxdr_unsigned(int, *tl);
|
|
} else if (nd->nd_flag & ND_NFSV4) {
|
|
/*
|
|
* For NFSv4, the postop attr are at the end, so no point
|
|
* in looking if nd_repstat != 0.
|
|
*/
|
|
if (!nd->nd_repstat) {
|
|
NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
|
|
if (*(tl + 1))
|
|
/* should never happen since nd_repstat != 0 */
|
|
nd->nd_flag |= ND_NOMOREDATA;
|
|
else
|
|
*retp = 1;
|
|
}
|
|
} else if (!nd->nd_repstat) {
|
|
/* For NFSv2, the attributes are here iff nd_repstat == 0 */
|
|
*retp = 1;
|
|
}
|
|
if (*retp) {
|
|
error = nfsm_loadattr(nd, nap);
|
|
if (error)
|
|
*retp = 0;
|
|
}
|
|
nfsmout:
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* nfscl_request() - mostly a wrapper for newnfs_request().
|
|
*/
|
|
int
|
|
nfscl_request(struct nfsrv_descript *nd, struct vnode *vp, NFSPROC_T *p,
|
|
struct ucred *cred)
|
|
{
|
|
int ret, vers;
|
|
struct nfsmount *nmp;
|
|
|
|
nmp = VFSTONFS(vp->v_mount);
|
|
if (nd->nd_flag & ND_NFSV4)
|
|
vers = NFS_VER4;
|
|
else if (nd->nd_flag & ND_NFSV3)
|
|
vers = NFS_VER3;
|
|
else
|
|
vers = NFS_VER2;
|
|
ret = newnfs_request(nd, nmp, NULL, &nmp->nm_sockreq, vp, p, cred,
|
|
NFS_PROG, vers, NULL, 1, NULL, NULL);
|
|
return (ret);
|
|
}
|
|
|
|
/*
|
|
* fill in this bsden's variant of statfs using nfsstatfs.
|
|
*/
|
|
void
|
|
nfscl_loadsbinfo(struct nfsmount *nmp, struct nfsstatfs *sfp, void *statfs)
|
|
{
|
|
struct statfs *sbp = (struct statfs *)statfs;
|
|
|
|
if (nmp->nm_flag & (NFSMNT_NFSV3 | NFSMNT_NFSV4)) {
|
|
sbp->f_bsize = NFS_FABLKSIZE;
|
|
sbp->f_blocks = sfp->sf_tbytes / NFS_FABLKSIZE;
|
|
sbp->f_bfree = sfp->sf_fbytes / NFS_FABLKSIZE;
|
|
/*
|
|
* Although sf_abytes is uint64_t and f_bavail is int64_t,
|
|
* the value after dividing by NFS_FABLKSIZE is small
|
|
* enough that it will fit in 63bits, so it is ok to
|
|
* assign it to f_bavail without fear that it will become
|
|
* negative.
|
|
*/
|
|
sbp->f_bavail = sfp->sf_abytes / NFS_FABLKSIZE;
|
|
sbp->f_files = sfp->sf_tfiles;
|
|
/* Since f_ffree is int64_t, clip it to 63bits. */
|
|
if (sfp->sf_ffiles > INT64_MAX)
|
|
sbp->f_ffree = INT64_MAX;
|
|
else
|
|
sbp->f_ffree = sfp->sf_ffiles;
|
|
} else if ((nmp->nm_flag & NFSMNT_NFSV4) == 0) {
|
|
/*
|
|
* The type casts to (int32_t) ensure that this code is
|
|
* compatible with the old NFS client, in that it will
|
|
* propagate bit31 to the high order bits. This may or may
|
|
* not be correct for NFSv2, but since it is a legacy
|
|
* environment, I'd rather retain backwards compatibility.
|
|
*/
|
|
sbp->f_bsize = (int32_t)sfp->sf_bsize;
|
|
sbp->f_blocks = (int32_t)sfp->sf_blocks;
|
|
sbp->f_bfree = (int32_t)sfp->sf_bfree;
|
|
sbp->f_bavail = (int32_t)sfp->sf_bavail;
|
|
sbp->f_files = 0;
|
|
sbp->f_ffree = 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Use the fsinfo stuff to update the mount point.
|
|
*/
|
|
void
|
|
nfscl_loadfsinfo(struct nfsmount *nmp, struct nfsfsinfo *fsp)
|
|
{
|
|
|
|
if ((nmp->nm_wsize == 0 || fsp->fs_wtpref < nmp->nm_wsize) &&
|
|
fsp->fs_wtpref >= NFS_FABLKSIZE)
|
|
nmp->nm_wsize = (fsp->fs_wtpref + NFS_FABLKSIZE - 1) &
|
|
~(NFS_FABLKSIZE - 1);
|
|
if (fsp->fs_wtmax < nmp->nm_wsize && fsp->fs_wtmax > 0) {
|
|
nmp->nm_wsize = fsp->fs_wtmax & ~(NFS_FABLKSIZE - 1);
|
|
if (nmp->nm_wsize == 0)
|
|
nmp->nm_wsize = fsp->fs_wtmax;
|
|
}
|
|
if (nmp->nm_wsize < NFS_FABLKSIZE)
|
|
nmp->nm_wsize = NFS_FABLKSIZE;
|
|
if ((nmp->nm_rsize == 0 || fsp->fs_rtpref < nmp->nm_rsize) &&
|
|
fsp->fs_rtpref >= NFS_FABLKSIZE)
|
|
nmp->nm_rsize = (fsp->fs_rtpref + NFS_FABLKSIZE - 1) &
|
|
~(NFS_FABLKSIZE - 1);
|
|
if (fsp->fs_rtmax < nmp->nm_rsize && fsp->fs_rtmax > 0) {
|
|
nmp->nm_rsize = fsp->fs_rtmax & ~(NFS_FABLKSIZE - 1);
|
|
if (nmp->nm_rsize == 0)
|
|
nmp->nm_rsize = fsp->fs_rtmax;
|
|
}
|
|
if (nmp->nm_rsize < NFS_FABLKSIZE)
|
|
nmp->nm_rsize = NFS_FABLKSIZE;
|
|
if ((nmp->nm_readdirsize == 0 || fsp->fs_dtpref < nmp->nm_readdirsize)
|
|
&& fsp->fs_dtpref >= NFS_DIRBLKSIZ)
|
|
nmp->nm_readdirsize = (fsp->fs_dtpref + NFS_DIRBLKSIZ - 1) &
|
|
~(NFS_DIRBLKSIZ - 1);
|
|
if (fsp->fs_rtmax < nmp->nm_readdirsize && fsp->fs_rtmax > 0) {
|
|
nmp->nm_readdirsize = fsp->fs_rtmax & ~(NFS_DIRBLKSIZ - 1);
|
|
if (nmp->nm_readdirsize == 0)
|
|
nmp->nm_readdirsize = fsp->fs_rtmax;
|
|
}
|
|
if (nmp->nm_readdirsize < NFS_DIRBLKSIZ)
|
|
nmp->nm_readdirsize = NFS_DIRBLKSIZ;
|
|
if (fsp->fs_maxfilesize > 0 &&
|
|
fsp->fs_maxfilesize < nmp->nm_maxfilesize)
|
|
nmp->nm_maxfilesize = fsp->fs_maxfilesize;
|
|
nmp->nm_mountp->mnt_stat.f_iosize = newnfs_iosize(nmp);
|
|
nmp->nm_state |= NFSSTA_GOTFSINFO;
|
|
}
|
|
|
|
/*
|
|
* Lookups source address which should be used to communicate with
|
|
* @nmp and stores it inside @pdst.
|
|
*
|
|
* Returns 0 on success.
|
|
*/
|
|
u_int8_t *
|
|
nfscl_getmyip(struct nfsmount *nmp, struct in6_addr *paddr, int *isinet6p)
|
|
{
|
|
#if defined(INET6) || defined(INET)
|
|
int fibnum;
|
|
|
|
fibnum = curthread->td_proc->p_fibnum;
|
|
#endif
|
|
#ifdef INET
|
|
if (nmp->nm_nam->sa_family == AF_INET) {
|
|
struct epoch_tracker et;
|
|
struct nhop_object *nh;
|
|
struct sockaddr_in *sin;
|
|
struct in_addr addr = {};
|
|
|
|
sin = (struct sockaddr_in *)nmp->nm_nam;
|
|
NET_EPOCH_ENTER(et);
|
|
CURVNET_SET(CRED_TO_VNET(nmp->nm_sockreq.nr_cred));
|
|
nh = fib4_lookup(fibnum, sin->sin_addr, 0, NHR_NONE, 0);
|
|
if (nh != NULL) {
|
|
addr = IA_SIN(ifatoia(nh->nh_ifa))->sin_addr;
|
|
if (IN_LOOPBACK(ntohl(addr.s_addr))) {
|
|
/* Ignore loopback addresses */
|
|
nh = NULL;
|
|
}
|
|
}
|
|
CURVNET_RESTORE();
|
|
NET_EPOCH_EXIT(et);
|
|
|
|
if (nh == NULL)
|
|
return (NULL);
|
|
*isinet6p = 0;
|
|
*((struct in_addr *)paddr) = addr;
|
|
|
|
return (u_int8_t *)paddr;
|
|
}
|
|
#endif
|
|
#ifdef INET6
|
|
if (nmp->nm_nam->sa_family == AF_INET6) {
|
|
struct epoch_tracker et;
|
|
struct sockaddr_in6 *sin6;
|
|
int error;
|
|
|
|
sin6 = (struct sockaddr_in6 *)nmp->nm_nam;
|
|
|
|
NET_EPOCH_ENTER(et);
|
|
CURVNET_SET(CRED_TO_VNET(nmp->nm_sockreq.nr_cred));
|
|
error = in6_selectsrc_addr(fibnum, &sin6->sin6_addr,
|
|
sin6->sin6_scope_id, NULL, paddr, NULL);
|
|
CURVNET_RESTORE();
|
|
NET_EPOCH_EXIT(et);
|
|
if (error != 0)
|
|
return (NULL);
|
|
|
|
if (IN6_IS_ADDR_LOOPBACK(paddr))
|
|
return (NULL);
|
|
|
|
/* Scope is embedded in */
|
|
*isinet6p = 1;
|
|
|
|
return (u_int8_t *)paddr;
|
|
}
|
|
#endif
|
|
return (NULL);
|
|
}
|
|
|
|
/*
|
|
* Copy NFS uid, gids from the cred structure.
|
|
*/
|
|
void
|
|
newnfs_copyincred(struct ucred *cr, struct nfscred *nfscr)
|
|
{
|
|
int i;
|
|
|
|
KASSERT(cr->cr_ngroups >= 0,
|
|
("newnfs_copyincred: negative cr_ngroups"));
|
|
nfscr->nfsc_uid = cr->cr_uid;
|
|
nfscr->nfsc_ngroups = MIN(cr->cr_ngroups, NFS_MAXGRPS + 1);
|
|
for (i = 0; i < nfscr->nfsc_ngroups; i++)
|
|
nfscr->nfsc_groups[i] = cr->cr_groups[i];
|
|
}
|
|
|
|
/*
|
|
* Do any client specific initialization.
|
|
*/
|
|
void
|
|
nfscl_init(void)
|
|
{
|
|
static int inited = 0;
|
|
|
|
if (inited)
|
|
return;
|
|
inited = 1;
|
|
nfscl_inited = 1;
|
|
ncl_pbuf_zone = pbuf_zsecond_create("nfspbuf", nswbuf / 2);
|
|
}
|
|
|
|
/*
|
|
* Check each of the attributes to be set, to ensure they aren't already
|
|
* the correct value. Disable setting ones already correct.
|
|
*/
|
|
int
|
|
nfscl_checksattr(struct vattr *vap, struct nfsvattr *nvap)
|
|
{
|
|
|
|
if (vap->va_mode != (mode_t)VNOVAL) {
|
|
if (vap->va_mode == nvap->na_mode)
|
|
vap->va_mode = (mode_t)VNOVAL;
|
|
}
|
|
if (vap->va_uid != (uid_t)VNOVAL) {
|
|
if (vap->va_uid == nvap->na_uid)
|
|
vap->va_uid = (uid_t)VNOVAL;
|
|
}
|
|
if (vap->va_gid != (gid_t)VNOVAL) {
|
|
if (vap->va_gid == nvap->na_gid)
|
|
vap->va_gid = (gid_t)VNOVAL;
|
|
}
|
|
if (vap->va_size != VNOVAL) {
|
|
if (vap->va_size == nvap->na_size)
|
|
vap->va_size = VNOVAL;
|
|
}
|
|
|
|
/*
|
|
* We are normally called with only a partially initialized
|
|
* VAP. Since the NFSv3 spec says that server may use the
|
|
* file attributes to store the verifier, the spec requires
|
|
* us to do a SETATTR RPC. FreeBSD servers store the verifier
|
|
* in atime, but we can't really assume that all servers will
|
|
* so we ensure that our SETATTR sets both atime and mtime.
|
|
* Set the VA_UTIMES_NULL flag for this case, so that
|
|
* the server's time will be used. This is needed to
|
|
* work around a bug in some Solaris servers, where
|
|
* setting the time TOCLIENT causes the Setattr RPC
|
|
* to return NFS_OK, but not set va_mode.
|
|
*/
|
|
if (vap->va_mtime.tv_sec == VNOVAL) {
|
|
vfs_timestamp(&vap->va_mtime);
|
|
vap->va_vaflags |= VA_UTIMES_NULL;
|
|
}
|
|
if (vap->va_atime.tv_sec == VNOVAL)
|
|
vap->va_atime = vap->va_mtime;
|
|
return (1);
|
|
}
|
|
|
|
/*
|
|
* Map nfsv4 errors to errno.h errors.
|
|
* The uid and gid arguments are only used for NFSERR_BADOWNER and that
|
|
* error should only be returned for the Open, Create and Setattr Ops.
|
|
* As such, most calls can just pass in 0 for those arguments.
|
|
*/
|
|
int
|
|
nfscl_maperr(struct thread *td, int error, uid_t uid, gid_t gid)
|
|
{
|
|
struct proc *p;
|
|
|
|
if (error < 10000 || error >= NFSERR_STALEWRITEVERF)
|
|
return (error);
|
|
if (td != NULL)
|
|
p = td->td_proc;
|
|
else
|
|
p = NULL;
|
|
switch (error) {
|
|
case NFSERR_BADOWNER:
|
|
tprintf(p, LOG_INFO,
|
|
"No name and/or group mapping for uid,gid:(%d,%d)\n",
|
|
uid, gid);
|
|
return (EPERM);
|
|
case NFSERR_BADNAME:
|
|
case NFSERR_BADCHAR:
|
|
printf("nfsv4 char/name not handled by server\n");
|
|
return (ENOENT);
|
|
case NFSERR_STALECLIENTID:
|
|
case NFSERR_STALESTATEID:
|
|
case NFSERR_EXPIRED:
|
|
case NFSERR_BADSTATEID:
|
|
case NFSERR_BADSESSION:
|
|
printf("nfsv4 recover err returned %d\n", error);
|
|
return (EIO);
|
|
case NFSERR_BADHANDLE:
|
|
case NFSERR_SERVERFAULT:
|
|
case NFSERR_BADTYPE:
|
|
case NFSERR_FHEXPIRED:
|
|
case NFSERR_RESOURCE:
|
|
case NFSERR_MOVED:
|
|
case NFSERR_MINORVERMISMATCH:
|
|
case NFSERR_OLDSTATEID:
|
|
case NFSERR_BADSEQID:
|
|
case NFSERR_LEASEMOVED:
|
|
case NFSERR_RECLAIMBAD:
|
|
case NFSERR_BADXDR:
|
|
case NFSERR_OPILLEGAL:
|
|
printf("nfsv4 client/server protocol prob err=%d\n",
|
|
error);
|
|
return (EIO);
|
|
case NFSERR_NOFILEHANDLE:
|
|
printf("nfsv4 no file handle: usually means the file "
|
|
"system is not exported on the NFSv4 server\n");
|
|
return (EIO);
|
|
case NFSERR_WRONGSEC:
|
|
tprintf(p, LOG_INFO, "NFSv4 error WrongSec: You probably need a"
|
|
" Kerberos TGT\n");
|
|
return (EIO);
|
|
default:
|
|
tprintf(p, LOG_INFO, "nfsv4 err=%d\n", error);
|
|
return (EIO);
|
|
};
|
|
}
|
|
|
|
/*
|
|
* Check to see if the process for this owner exists. Return 1 if it doesn't
|
|
* and 0 otherwise.
|
|
*/
|
|
int
|
|
nfscl_procdoesntexist(u_int8_t *own)
|
|
{
|
|
union {
|
|
u_int32_t lval;
|
|
u_int8_t cval[4];
|
|
} tl;
|
|
struct proc *p;
|
|
pid_t pid;
|
|
int i, ret = 0;
|
|
|
|
/* For the single open_owner of all 0 bytes, just return 0. */
|
|
for (i = 0; i < NFSV4CL_LOCKNAMELEN; i++)
|
|
if (own[i] != 0)
|
|
break;
|
|
if (i == NFSV4CL_LOCKNAMELEN)
|
|
return (0);
|
|
|
|
tl.cval[0] = *own++;
|
|
tl.cval[1] = *own++;
|
|
tl.cval[2] = *own++;
|
|
tl.cval[3] = *own++;
|
|
pid = tl.lval;
|
|
p = pfind_any_locked(pid);
|
|
if (p == NULL)
|
|
return (1);
|
|
if (p->p_stats == NULL) {
|
|
PROC_UNLOCK(p);
|
|
return (0);
|
|
}
|
|
tl.cval[0] = *own++;
|
|
tl.cval[1] = *own++;
|
|
tl.cval[2] = *own++;
|
|
tl.cval[3] = *own++;
|
|
if (tl.lval != p->p_stats->p_start.tv_sec) {
|
|
ret = 1;
|
|
} else {
|
|
tl.cval[0] = *own++;
|
|
tl.cval[1] = *own++;
|
|
tl.cval[2] = *own++;
|
|
tl.cval[3] = *own;
|
|
if (tl.lval != p->p_stats->p_start.tv_usec)
|
|
ret = 1;
|
|
}
|
|
PROC_UNLOCK(p);
|
|
return (ret);
|
|
}
|
|
|
|
/*
|
|
* - nfs pseudo system call for the client
|
|
*/
|
|
/*
|
|
* MPSAFE
|
|
*/
|
|
static int
|
|
nfssvc_nfscl(struct thread *td, struct nfssvc_args *uap)
|
|
{
|
|
struct file *fp;
|
|
struct nfscbd_args nfscbdarg;
|
|
struct nfsd_nfscbd_args nfscbdarg2;
|
|
struct nameidata nd;
|
|
struct nfscl_dumpmntopts dumpmntopts;
|
|
cap_rights_t rights;
|
|
char *buf;
|
|
int error;
|
|
struct mount *mp;
|
|
struct nfsmount *nmp;
|
|
|
|
NFSD_CURVNET_SET(NFSD_TD_TO_VNET(td));
|
|
if (uap->flag & NFSSVC_CBADDSOCK) {
|
|
error = copyin(uap->argp, (caddr_t)&nfscbdarg, sizeof(nfscbdarg));
|
|
if (error)
|
|
goto out;
|
|
/*
|
|
* Since we don't know what rights might be required,
|
|
* pretend that we need them all. It is better to be too
|
|
* careful than too reckless.
|
|
*/
|
|
error = fget(td, nfscbdarg.sock,
|
|
cap_rights_init_one(&rights, CAP_SOCK_CLIENT), &fp);
|
|
if (error)
|
|
goto out;
|
|
if (fp->f_type != DTYPE_SOCKET) {
|
|
fdrop(fp, td);
|
|
error = EPERM;
|
|
goto out;
|
|
}
|
|
error = nfscbd_addsock(fp);
|
|
fdrop(fp, td);
|
|
if (!error && nfscl_enablecallb == 0) {
|
|
nfsv4_cbport = nfscbdarg.port;
|
|
nfscl_enablecallb = 1;
|
|
}
|
|
} else if (uap->flag & NFSSVC_NFSCBD) {
|
|
if (uap->argp == NULL) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
error = copyin(uap->argp, (caddr_t)&nfscbdarg2,
|
|
sizeof(nfscbdarg2));
|
|
if (error)
|
|
goto out;
|
|
error = nfscbd_nfsd(td, &nfscbdarg2);
|
|
} else if (uap->flag & NFSSVC_DUMPMNTOPTS) {
|
|
error = copyin(uap->argp, &dumpmntopts, sizeof(dumpmntopts));
|
|
if (error == 0 && (dumpmntopts.ndmnt_blen < 256 ||
|
|
dumpmntopts.ndmnt_blen > 1024))
|
|
error = EINVAL;
|
|
if (error == 0)
|
|
error = nfsrv_lookupfilename(&nd,
|
|
dumpmntopts.ndmnt_fname, td);
|
|
if (error == 0 && strcmp(nd.ni_vp->v_mount->mnt_vfc->vfc_name,
|
|
"nfs") != 0) {
|
|
vput(nd.ni_vp);
|
|
error = EINVAL;
|
|
}
|
|
if (error == 0) {
|
|
buf = malloc(dumpmntopts.ndmnt_blen, M_TEMP, M_WAITOK |
|
|
M_ZERO);
|
|
nfscl_retopts(VFSTONFS(nd.ni_vp->v_mount), buf,
|
|
dumpmntopts.ndmnt_blen);
|
|
vput(nd.ni_vp);
|
|
error = copyout(buf, dumpmntopts.ndmnt_buf,
|
|
dumpmntopts.ndmnt_blen);
|
|
free(buf, M_TEMP);
|
|
}
|
|
} else if (uap->flag & NFSSVC_FORCEDISM) {
|
|
buf = malloc(MNAMELEN + 1, M_TEMP, M_WAITOK);
|
|
error = copyinstr(uap->argp, buf, MNAMELEN + 1, NULL);
|
|
if (error == 0) {
|
|
nmp = NULL;
|
|
mtx_lock(&mountlist_mtx);
|
|
TAILQ_FOREACH(mp, &mountlist, mnt_list) {
|
|
if (strcmp(mp->mnt_stat.f_mntonname, buf) ==
|
|
0 && strcmp(mp->mnt_stat.f_fstypename,
|
|
"nfs") == 0 && mp->mnt_data != NULL) {
|
|
nmp = VFSTONFS(mp);
|
|
NFSDDSLOCK();
|
|
if (nfsv4_findmirror(nmp) != NULL) {
|
|
NFSDDSUNLOCK();
|
|
error = ENXIO;
|
|
nmp = NULL;
|
|
break;
|
|
}
|
|
mtx_lock(&nmp->nm_mtx);
|
|
if ((nmp->nm_privflag &
|
|
NFSMNTP_FORCEDISM) == 0) {
|
|
nmp->nm_privflag |=
|
|
(NFSMNTP_FORCEDISM |
|
|
NFSMNTP_CANCELRPCS);
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
} else {
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
nmp = NULL;
|
|
}
|
|
NFSDDSUNLOCK();
|
|
break;
|
|
}
|
|
}
|
|
mtx_unlock(&mountlist_mtx);
|
|
|
|
if (nmp != NULL) {
|
|
/*
|
|
* Call newnfs_nmcancelreqs() to cause
|
|
* any RPCs in progress on the mount point to
|
|
* fail.
|
|
* This will cause any process waiting for an
|
|
* RPC to complete while holding a vnode lock
|
|
* on the mounted-on vnode (such as "df" or
|
|
* a non-forced "umount") to fail.
|
|
* This will unlock the mounted-on vnode so
|
|
* a forced dismount can succeed.
|
|
* Then clear NFSMNTP_CANCELRPCS and wakeup(),
|
|
* so that nfs_unmount() can complete.
|
|
*/
|
|
newnfs_nmcancelreqs(nmp);
|
|
mtx_lock(&nmp->nm_mtx);
|
|
nmp->nm_privflag &= ~NFSMNTP_CANCELRPCS;
|
|
wakeup(nmp);
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
} else if (error == 0)
|
|
error = EINVAL;
|
|
}
|
|
free(buf, M_TEMP);
|
|
} else {
|
|
error = EINVAL;
|
|
}
|
|
out:
|
|
NFSD_CURVNET_RESTORE();
|
|
return (error);
|
|
}
|
|
|
|
extern int (*nfsd_call_nfscl)(struct thread *, struct nfssvc_args *);
|
|
|
|
/*
|
|
* Called once to initialize data structures...
|
|
*/
|
|
static int
|
|
nfscl_modevent(module_t mod, int type, void *data)
|
|
{
|
|
int error = 0;
|
|
static int loaded = 0;
|
|
|
|
switch (type) {
|
|
case MOD_LOAD:
|
|
if (loaded)
|
|
return (0);
|
|
newnfs_portinit();
|
|
mtx_init(&ncl_iod_mutex, "ncl_iod_mutex", NULL, MTX_DEF);
|
|
nfscl_init();
|
|
NFSD_LOCK();
|
|
nfsrvd_cbinit(0);
|
|
NFSD_UNLOCK();
|
|
ncl_call_invalcaches = ncl_invalcaches;
|
|
nfsd_call_nfscl = nfssvc_nfscl;
|
|
loaded = 1;
|
|
break;
|
|
|
|
case MOD_UNLOAD:
|
|
if (nfs_numnfscbd != 0) {
|
|
error = EBUSY;
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* XXX: Unloading of nfscl module is unsupported.
|
|
*/
|
|
#if 0
|
|
ncl_call_invalcaches = NULL;
|
|
nfsd_call_nfscl = NULL;
|
|
uma_zdestroy(ncl_pbuf_zone);
|
|
/* and get rid of the mutexes */
|
|
mtx_destroy(&ncl_iod_mutex);
|
|
loaded = 0;
|
|
break;
|
|
#else
|
|
/* FALLTHROUGH */
|
|
#endif
|
|
default:
|
|
error = EOPNOTSUPP;
|
|
break;
|
|
}
|
|
return error;
|
|
}
|
|
static moduledata_t nfscl_mod = {
|
|
"nfscl",
|
|
nfscl_modevent,
|
|
NULL,
|
|
};
|
|
/*
|
|
* This is the main module declaration for the NFS client. The
|
|
* nfscl_modevent() function is needed to ensure that the module
|
|
* cannot be unloaded, among other things.
|
|
* There is also a module declaration in sys/fs/nfsclient/nfs_clvfsops.c
|
|
* for the name "nfs" within the VFS_SET() macro that defines the "nfs"
|
|
* file system type.
|
|
*/
|
|
DECLARE_MODULE(nfscl, nfscl_mod, SI_SUB_VFS, SI_ORDER_FIRST);
|
|
|
|
/* So that loader and kldload(2) can find us, wherever we are.. */
|
|
MODULE_VERSION(nfscl, 1);
|
|
MODULE_DEPEND(nfscl, nfscommon, 1, 1, 1);
|
|
MODULE_DEPEND(nfscl, krpc, 1, 1, 1);
|
|
MODULE_DEPEND(nfscl, nfssvc, 1, 1, 1);
|
|
MODULE_DEPEND(nfscl, xdr, 1, 1, 1);
|