ea26d58729
Removed dead code that assumed that M_TRYWAIT can return NULL; it's not true since the advent of MBUMA. Reviewed by: arch There are ongoing disputes as to whether we want to switch to directly using UMA flags M_WAITOK/M_NOWAIT for mbuf(9) allocation.
1200 lines
29 KiB
C
1200 lines
29 KiB
C
/*-
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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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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)nfs_subs.c 8.8 (Berkeley) 5/22/95
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* These functions support the macros and help fiddle mbuf chains for
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* the nfs op functions. They do things like create the rpc header and
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* copy data between mbuf chains and uio lists.
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/bio.h>
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#include <sys/buf.h>
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#include <sys/proc.h>
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#include <sys/mount.h>
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#include <sys/vnode.h>
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#include <sys/namei.h>
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#include <sys/mbuf.h>
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <sys/malloc.h>
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#include <sys/sysent.h>
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#include <sys/syscall.h>
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#include <sys/sysproto.h>
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#include <vm/vm.h>
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#include <vm/vm_object.h>
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#include <vm/vm_extern.h>
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#include <vm/uma.h>
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#include <rpc/rpcclnt.h>
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#include <nfs/rpcv2.h>
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#include <nfs/nfsproto.h>
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#include <nfsclient/nfs.h>
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#include <nfsclient/nfsnode.h>
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#include <nfs/xdr_subs.h>
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#include <nfsclient/nfsm_subs.h>
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#include <nfsclient/nfsmount.h>
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#include <netinet/in.h>
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/*
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* Note that stdarg.h and the ANSI style va_start macro is used for both
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* ANSI and traditional C compilers.
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*/
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#include <machine/stdarg.h>
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/*
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* Data items converted to xdr at startup, since they are constant
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* This is kinda hokey, but may save a little time doing byte swaps
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*/
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u_int32_t nfs_xdrneg1;
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u_int32_t rpc_call, rpc_vers, rpc_reply, rpc_msgdenied, rpc_autherr,
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rpc_mismatch, rpc_auth_unix, rpc_msgaccepted;
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u_int32_t nfs_true, nfs_false;
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/* And other global data */
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static u_int32_t nfs_xid = 0;
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static enum vtype nv2tov_type[8]= {
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VNON, VREG, VDIR, VBLK, VCHR, VLNK, VNON, VNON
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};
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int nfs_ticks;
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int nfs_pbuf_freecnt = -1; /* start out unlimited */
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struct nfs_reqq nfs_reqq;
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struct mtx nfs_reqq_mtx;
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struct nfs_bufq nfs_bufq;
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static struct mtx nfs_xid_mtx;
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/*
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* and the reverse mapping from generic to Version 2 procedure numbers
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*/
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int nfsv2_procid[NFS_NPROCS] = {
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NFSV2PROC_NULL,
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NFSV2PROC_GETATTR,
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NFSV2PROC_SETATTR,
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NFSV2PROC_LOOKUP,
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NFSV2PROC_NOOP,
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NFSV2PROC_READLINK,
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NFSV2PROC_READ,
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NFSV2PROC_WRITE,
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NFSV2PROC_CREATE,
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NFSV2PROC_MKDIR,
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NFSV2PROC_SYMLINK,
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NFSV2PROC_CREATE,
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NFSV2PROC_REMOVE,
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NFSV2PROC_RMDIR,
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NFSV2PROC_RENAME,
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NFSV2PROC_LINK,
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NFSV2PROC_READDIR,
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NFSV2PROC_NOOP,
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NFSV2PROC_STATFS,
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NFSV2PROC_NOOP,
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NFSV2PROC_NOOP,
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NFSV2PROC_NOOP,
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NFSV2PROC_NOOP,
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};
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LIST_HEAD(nfsnodehashhead, nfsnode);
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u_int32_t
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nfs_xid_gen(void)
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{
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uint32_t xid;
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mtx_lock(&nfs_xid_mtx);
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/* Get a pretty random xid to start with */
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if (!nfs_xid)
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nfs_xid = random();
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/*
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* Skip zero xid if it should ever happen.
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*/
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if (++nfs_xid == 0)
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nfs_xid++;
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xid = nfs_xid;
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mtx_unlock(&nfs_xid_mtx);
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return xid;
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}
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/*
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* Create the header for an rpc request packet
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* The hsiz is the size of the rest of the nfs request header.
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* (just used to decide if a cluster is a good idea)
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*/
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struct mbuf *
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nfsm_reqhead(struct vnode *vp, u_long procid, int hsiz)
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{
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struct mbuf *mb;
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MGET(mb, M_WAIT, MT_DATA);
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if (hsiz >= MINCLSIZE)
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MCLGET(mb, M_WAIT);
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mb->m_len = 0;
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return (mb);
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}
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/*
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* Build the RPC header and fill in the authorization info.
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* The authorization string argument is only used when the credentials
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* come from outside of the kernel.
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* Returns the head of the mbuf list.
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*/
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struct mbuf *
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nfsm_rpchead(struct ucred *cr, int nmflag, int procid, int auth_type,
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int auth_len, struct mbuf *mrest, int mrest_len, struct mbuf **mbp,
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u_int32_t **xidpp)
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{
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struct mbuf *mb;
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u_int32_t *tl;
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caddr_t bpos;
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int i;
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struct mbuf *mreq;
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int grpsiz, authsiz;
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authsiz = nfsm_rndup(auth_len);
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MGETHDR(mb, M_WAIT, MT_DATA);
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if ((authsiz + 10 * NFSX_UNSIGNED) >= MINCLSIZE) {
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MCLGET(mb, M_WAIT);
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} else if ((authsiz + 10 * NFSX_UNSIGNED) < MHLEN) {
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MH_ALIGN(mb, authsiz + 10 * NFSX_UNSIGNED);
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} else {
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MH_ALIGN(mb, 8 * NFSX_UNSIGNED);
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}
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mb->m_len = 0;
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mreq = mb;
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bpos = mtod(mb, caddr_t);
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/*
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* First the RPC header.
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*/
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tl = nfsm_build(u_int32_t *, 8 * NFSX_UNSIGNED);
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*xidpp = tl;
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*tl++ = txdr_unsigned(nfs_xid_gen());
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*tl++ = rpc_call;
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*tl++ = rpc_vers;
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*tl++ = txdr_unsigned(NFS_PROG);
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if (nmflag & NFSMNT_NFSV3) {
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*tl++ = txdr_unsigned(NFS_VER3);
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*tl++ = txdr_unsigned(procid);
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} else {
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*tl++ = txdr_unsigned(NFS_VER2);
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*tl++ = txdr_unsigned(nfsv2_procid[procid]);
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}
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/*
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* And then the authorization cred.
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*/
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*tl++ = txdr_unsigned(auth_type);
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*tl = txdr_unsigned(authsiz);
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switch (auth_type) {
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case RPCAUTH_UNIX:
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tl = nfsm_build(u_int32_t *, auth_len);
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*tl++ = 0; /* stamp ?? */
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*tl++ = 0; /* NULL hostname */
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*tl++ = txdr_unsigned(cr->cr_uid);
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*tl++ = txdr_unsigned(cr->cr_groups[0]);
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grpsiz = (auth_len >> 2) - 5;
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*tl++ = txdr_unsigned(grpsiz);
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for (i = 1; i <= grpsiz; i++)
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*tl++ = txdr_unsigned(cr->cr_groups[i]);
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break;
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}
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/*
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* And the verifier...
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*/
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tl = nfsm_build(u_int32_t *, 2 * NFSX_UNSIGNED);
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*tl++ = txdr_unsigned(RPCAUTH_NULL);
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*tl = 0;
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mb->m_next = mrest;
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mreq->m_pkthdr.len = authsiz + 10 * NFSX_UNSIGNED + mrest_len;
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mreq->m_pkthdr.rcvif = NULL;
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*mbp = mb;
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return (mreq);
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}
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/*
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* copies a uio scatter/gather list to an mbuf chain.
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* NOTE: can ony handle iovcnt == 1
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*/
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int
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nfsm_uiotombuf(struct uio *uiop, struct mbuf **mq, int siz, caddr_t *bpos)
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{
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char *uiocp;
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struct mbuf *mp, *mp2;
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int xfer, left, mlen;
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int uiosiz, clflg, rem;
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char *cp;
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#ifdef DIAGNOSTIC
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if (uiop->uio_iovcnt != 1)
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panic("nfsm_uiotombuf: iovcnt != 1");
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#endif
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if (siz > MLEN) /* or should it >= MCLBYTES ?? */
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clflg = 1;
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else
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clflg = 0;
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rem = nfsm_rndup(siz)-siz;
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mp = mp2 = *mq;
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while (siz > 0) {
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left = uiop->uio_iov->iov_len;
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uiocp = uiop->uio_iov->iov_base;
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if (left > siz)
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left = siz;
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uiosiz = left;
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while (left > 0) {
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mlen = M_TRAILINGSPACE(mp);
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if (mlen == 0) {
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MGET(mp, M_WAIT, MT_DATA);
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if (clflg)
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MCLGET(mp, M_WAIT);
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mp->m_len = 0;
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mp2->m_next = mp;
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mp2 = mp;
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mlen = M_TRAILINGSPACE(mp);
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}
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xfer = (left > mlen) ? mlen : left;
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#ifdef notdef
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/* Not Yet.. */
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if (uiop->uio_iov->iov_op != NULL)
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(*(uiop->uio_iov->iov_op))
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(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer);
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else
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#endif
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if (uiop->uio_segflg == UIO_SYSSPACE)
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bcopy(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer);
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else
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copyin(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer);
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mp->m_len += xfer;
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left -= xfer;
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uiocp += xfer;
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uiop->uio_offset += xfer;
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uiop->uio_resid -= xfer;
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}
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uiop->uio_iov->iov_base =
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(char *)uiop->uio_iov->iov_base + uiosiz;
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uiop->uio_iov->iov_len -= uiosiz;
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siz -= uiosiz;
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}
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if (rem > 0) {
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if (rem > M_TRAILINGSPACE(mp)) {
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MGET(mp, M_WAIT, MT_DATA);
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mp->m_len = 0;
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mp2->m_next = mp;
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}
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cp = mtod(mp, caddr_t)+mp->m_len;
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for (left = 0; left < rem; left++)
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*cp++ = '\0';
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mp->m_len += rem;
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*bpos = cp;
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} else
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*bpos = mtod(mp, caddr_t)+mp->m_len;
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*mq = mp;
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return (0);
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}
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/*
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* Copy a string into mbufs for the hard cases...
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*/
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int
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nfsm_strtmbuf(struct mbuf **mb, char **bpos, const char *cp, long siz)
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{
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struct mbuf *m1 = NULL, *m2;
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long left, xfer, len, tlen;
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u_int32_t *tl;
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int putsize;
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putsize = 1;
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m2 = *mb;
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left = M_TRAILINGSPACE(m2);
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if (left > 0) {
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tl = ((u_int32_t *)(*bpos));
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*tl++ = txdr_unsigned(siz);
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putsize = 0;
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left -= NFSX_UNSIGNED;
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m2->m_len += NFSX_UNSIGNED;
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if (left > 0) {
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bcopy(cp, (caddr_t) tl, left);
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siz -= left;
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cp += left;
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m2->m_len += left;
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left = 0;
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}
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}
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/* Loop around adding mbufs */
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while (siz > 0) {
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MGET(m1, M_WAIT, MT_DATA);
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if (siz > MLEN)
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MCLGET(m1, M_WAIT);
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m1->m_len = NFSMSIZ(m1);
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m2->m_next = m1;
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m2 = m1;
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tl = mtod(m1, u_int32_t *);
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tlen = 0;
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if (putsize) {
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*tl++ = txdr_unsigned(siz);
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m1->m_len -= NFSX_UNSIGNED;
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tlen = NFSX_UNSIGNED;
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putsize = 0;
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}
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if (siz < m1->m_len) {
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len = nfsm_rndup(siz);
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xfer = siz;
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if (xfer < len)
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*(tl+(xfer>>2)) = 0;
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} else {
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xfer = len = m1->m_len;
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}
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bcopy(cp, (caddr_t) tl, xfer);
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m1->m_len = len+tlen;
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siz -= xfer;
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cp += xfer;
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}
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*mb = m1;
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*bpos = mtod(m1, caddr_t)+m1->m_len;
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return (0);
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}
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/*
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* Called once to initialize data structures...
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*/
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int
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nfs_init(struct vfsconf *vfsp)
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{
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int i;
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nfsmount_zone = uma_zcreate("NFSMOUNT", sizeof(struct nfsmount),
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NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, 0);
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rpc_vers = txdr_unsigned(RPC_VER2);
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rpc_call = txdr_unsigned(RPC_CALL);
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rpc_reply = txdr_unsigned(RPC_REPLY);
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rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED);
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rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED);
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rpc_mismatch = txdr_unsigned(RPC_MISMATCH);
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rpc_autherr = txdr_unsigned(RPC_AUTHERR);
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rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX);
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nfs_true = txdr_unsigned(TRUE);
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nfs_false = txdr_unsigned(FALSE);
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nfs_xdrneg1 = txdr_unsigned(-1);
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nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000;
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if (nfs_ticks < 1)
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nfs_ticks = 1;
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/* Ensure async daemons disabled */
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for (i = 0; i < NFS_MAXASYNCDAEMON; i++) {
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nfs_iodwant[i] = NULL;
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nfs_iodmount[i] = NULL;
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}
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nfs_nhinit(); /* Init the nfsnode table */
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/*
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* Initialize reply list and start timer
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*/
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TAILQ_INIT(&nfs_reqq);
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callout_init(&nfs_callout, CALLOUT_MPSAFE);
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mtx_init(&nfs_reqq_mtx, "NFS reqq lock", NULL, MTX_DEF);
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mtx_init(&nfs_iod_mtx, "NFS iod lock", NULL, MTX_DEF);
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mtx_init(&nfs_xid_mtx, "NFS xid lock", NULL, MTX_DEF);
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nfs_pbuf_freecnt = nswbuf / 2 + 1;
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return (0);
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}
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int
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nfs_uninit(struct vfsconf *vfsp)
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{
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int i;
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callout_stop(&nfs_callout);
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KASSERT(TAILQ_EMPTY(&nfs_reqq),
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("nfs_uninit: request queue not empty"));
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/*
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* Tell all nfsiod processes to exit. Clear nfs_iodmax, and wakeup
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* any sleeping nfsiods so they check nfs_iodmax and exit.
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*/
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mtx_lock(&nfs_iod_mtx);
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nfs_iodmax = 0;
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for (i = 0; i < nfs_numasync; i++)
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if (nfs_iodwant[i])
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wakeup(&nfs_iodwant[i]);
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/* The last nfsiod to exit will wake us up when nfs_numasync hits 0 */
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while (nfs_numasync)
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msleep(&nfs_numasync, &nfs_iod_mtx, PWAIT, "ioddie", 0);
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mtx_unlock(&nfs_iod_mtx);
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nfs_nhuninit();
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uma_zdestroy(nfsmount_zone);
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return (0);
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}
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void
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nfs_dircookie_lock(struct nfsnode *np)
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{
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mtx_lock(&np->n_mtx);
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while (np->n_flag & NDIRCOOKIELK)
|
|
(void) msleep(&np->n_flag, &np->n_mtx, PZERO, "nfsdirlk", 0);
|
|
np->n_flag |= NDIRCOOKIELK;
|
|
mtx_unlock(&np->n_mtx);
|
|
}
|
|
|
|
void
|
|
nfs_dircookie_unlock(struct nfsnode *np)
|
|
{
|
|
mtx_lock(&np->n_mtx);
|
|
np->n_flag &= ~NDIRCOOKIELK;
|
|
wakeup(&np->n_flag);
|
|
mtx_unlock(&np->n_mtx);
|
|
}
|
|
|
|
int
|
|
nfs_upgrade_vnlock(struct vnode *vp)
|
|
{
|
|
int old_lock;
|
|
|
|
if ((old_lock = VOP_ISLOCKED(vp)) != LK_EXCLUSIVE) {
|
|
if (old_lock == LK_SHARED) {
|
|
/* Upgrade to exclusive lock, this might block */
|
|
vn_lock(vp, LK_UPGRADE | LK_RETRY);
|
|
} else {
|
|
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
|
|
}
|
|
}
|
|
return old_lock;
|
|
}
|
|
|
|
void
|
|
nfs_downgrade_vnlock(struct vnode *vp, int old_lock)
|
|
{
|
|
if (old_lock != LK_EXCLUSIVE) {
|
|
if (old_lock == LK_SHARED) {
|
|
/* Downgrade from exclusive lock, this might block */
|
|
vn_lock(vp, LK_DOWNGRADE);
|
|
} else {
|
|
VOP_UNLOCK(vp, 0);
|
|
}
|
|
}
|
|
}
|
|
|
|
void
|
|
nfs_printf(const char *fmt, ...)
|
|
{
|
|
va_list ap;
|
|
|
|
mtx_lock(&Giant);
|
|
va_start(ap, fmt);
|
|
printf(fmt, ap);
|
|
va_end(ap);
|
|
mtx_unlock(&Giant);
|
|
}
|
|
|
|
/*
|
|
* Attribute cache routines.
|
|
* nfs_loadattrcache() - loads or updates the cache contents from attributes
|
|
* that are on the mbuf list
|
|
* nfs_getattrcache() - returns valid attributes if found in cache, returns
|
|
* error otherwise
|
|
*/
|
|
|
|
/*
|
|
* Load the attribute cache (that lives in the nfsnode entry) with
|
|
* the values on the mbuf list and
|
|
* Iff vap not NULL
|
|
* copy the attributes to *vaper
|
|
*/
|
|
int
|
|
nfs_loadattrcache(struct vnode **vpp, struct mbuf **mdp, caddr_t *dposp,
|
|
struct vattr *vaper, int dontshrink)
|
|
{
|
|
struct vnode *vp = *vpp;
|
|
struct vattr *vap;
|
|
struct nfs_fattr *fp;
|
|
struct nfsnode *np;
|
|
int32_t t1;
|
|
caddr_t cp2;
|
|
int rdev;
|
|
struct mbuf *md;
|
|
enum vtype vtyp;
|
|
u_short vmode;
|
|
struct timespec mtime, mtime_save;
|
|
int v3 = NFS_ISV3(vp);
|
|
struct thread *td = curthread;
|
|
|
|
md = *mdp;
|
|
t1 = (mtod(md, caddr_t) + md->m_len) - *dposp;
|
|
cp2 = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, M_WAIT);
|
|
if (cp2 == NULL)
|
|
return EBADRPC;
|
|
fp = (struct nfs_fattr *)cp2;
|
|
if (v3) {
|
|
vtyp = nfsv3tov_type(fp->fa_type);
|
|
vmode = fxdr_unsigned(u_short, fp->fa_mode);
|
|
rdev = makedev(fxdr_unsigned(int, fp->fa3_rdev.specdata1),
|
|
fxdr_unsigned(int, fp->fa3_rdev.specdata2));
|
|
fxdr_nfsv3time(&fp->fa3_mtime, &mtime);
|
|
} else {
|
|
vtyp = nfsv2tov_type(fp->fa_type);
|
|
vmode = fxdr_unsigned(u_short, fp->fa_mode);
|
|
/*
|
|
* XXX
|
|
*
|
|
* The duplicate information returned in fa_type and fa_mode
|
|
* is an ambiguity in the NFS version 2 protocol.
|
|
*
|
|
* VREG should be taken literally as a regular file. If a
|
|
* server intents to return some type information differently
|
|
* in the upper bits of the mode field (e.g. for sockets, or
|
|
* FIFOs), NFSv2 mandates fa_type to be VNON. Anyway, we
|
|
* leave the examination of the mode bits even in the VREG
|
|
* case to avoid breakage for bogus servers, but we make sure
|
|
* that there are actually type bits set in the upper part of
|
|
* fa_mode (and failing that, trust the va_type field).
|
|
*
|
|
* NFSv3 cleared the issue, and requires fa_mode to not
|
|
* contain any type information (while also introduing sockets
|
|
* and FIFOs for fa_type).
|
|
*/
|
|
if (vtyp == VNON || (vtyp == VREG && (vmode & S_IFMT) != 0))
|
|
vtyp = IFTOVT(vmode);
|
|
rdev = fxdr_unsigned(int32_t, fp->fa2_rdev);
|
|
fxdr_nfsv2time(&fp->fa2_mtime, &mtime);
|
|
|
|
/*
|
|
* Really ugly NFSv2 kludge.
|
|
*/
|
|
if (vtyp == VCHR && rdev == 0xffffffff)
|
|
vtyp = VFIFO;
|
|
}
|
|
|
|
/*
|
|
* 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);
|
|
mtx_lock(&np->n_mtx);
|
|
if (vp->v_type != vtyp) {
|
|
vp->v_type = vtyp;
|
|
if (vp->v_type == VFIFO)
|
|
vp->v_op = &nfs_fifoops;
|
|
np->n_mtime = mtime;
|
|
}
|
|
vap = &np->n_vattr;
|
|
vap->va_type = vtyp;
|
|
vap->va_mode = (vmode & 07777);
|
|
vap->va_rdev = rdev;
|
|
mtime_save = vap->va_mtime;
|
|
vap->va_mtime = mtime;
|
|
vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0];
|
|
if (v3) {
|
|
vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink);
|
|
vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid);
|
|
vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid);
|
|
vap->va_size = fxdr_hyper(&fp->fa3_size);
|
|
vap->va_blocksize = NFS_FABLKSIZE;
|
|
vap->va_bytes = fxdr_hyper(&fp->fa3_used);
|
|
vap->va_fileid = fxdr_unsigned(int32_t,
|
|
fp->fa3_fileid.nfsuquad[1]);
|
|
fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime);
|
|
fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime);
|
|
vap->va_flags = 0;
|
|
vap->va_filerev = 0;
|
|
} else {
|
|
vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink);
|
|
vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid);
|
|
vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid);
|
|
vap->va_size = fxdr_unsigned(u_int32_t, fp->fa2_size);
|
|
vap->va_blocksize = fxdr_unsigned(int32_t, fp->fa2_blocksize);
|
|
vap->va_bytes = (u_quad_t)fxdr_unsigned(int32_t, fp->fa2_blocks)
|
|
* NFS_FABLKSIZE;
|
|
vap->va_fileid = fxdr_unsigned(int32_t, fp->fa2_fileid);
|
|
fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime);
|
|
vap->va_flags = 0;
|
|
vap->va_ctime.tv_sec = fxdr_unsigned(u_int32_t,
|
|
fp->fa2_ctime.nfsv2_sec);
|
|
vap->va_ctime.tv_nsec = 0;
|
|
vap->va_gen = fxdr_unsigned(u_int32_t, fp->fa2_ctime.nfsv2_usec);
|
|
vap->va_filerev = 0;
|
|
}
|
|
np->n_attrstamp = time_second;
|
|
/* Timestamp the NFS otw getattr fetch */
|
|
if (td->td_proc) {
|
|
np->n_ac_ts_tid = td->td_tid;
|
|
np->n_ac_ts_pid = td->td_proc->p_pid;
|
|
np->n_ac_ts_syscalls = td->td_syscalls;
|
|
} else
|
|
bzero(&np->n_ac_ts, sizeof(struct nfs_attrcache_timestamp));
|
|
|
|
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;
|
|
} 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;
|
|
}
|
|
vnode_pager_setsize(vp, np->n_size);
|
|
} 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;
|
|
if (vaper != NULL) {
|
|
bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*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;
|
|
}
|
|
}
|
|
mtx_unlock(&np->n_mtx);
|
|
return (0);
|
|
}
|
|
|
|
#ifdef NFS_ACDEBUG
|
|
#include <sys/sysctl.h>
|
|
SYSCTL_DECL(_vfs_nfs);
|
|
static int nfs_acdebug;
|
|
SYSCTL_INT(_vfs_nfs, OID_AUTO, acdebug, CTLFLAG_RW, &nfs_acdebug, 0, "");
|
|
#endif
|
|
|
|
/*
|
|
* Check the time stamp
|
|
* If the cache is valid, copy contents to *vap and return 0
|
|
* otherwise return an error
|
|
*/
|
|
int
|
|
nfs_getattrcache(struct vnode *vp, struct vattr *vaper)
|
|
{
|
|
struct nfsnode *np;
|
|
struct vattr *vap;
|
|
struct nfsmount *nmp;
|
|
int timeo;
|
|
|
|
np = VTONFS(vp);
|
|
vap = &np->n_vattr;
|
|
nmp = VFSTONFS(vp->v_mount);
|
|
#ifdef NFS_ACDEBUG
|
|
mtx_lock(&Giant); /* nfs_printf() */
|
|
#endif
|
|
mtx_lock(&np->n_mtx);
|
|
/* XXX n_mtime doesn't seem to be updated on a miss-and-reload */
|
|
timeo = (time_second - np->n_mtime.tv_sec) / 10;
|
|
|
|
#ifdef NFS_ACDEBUG
|
|
if (nfs_acdebug>1)
|
|
nfs_printf("nfs_getattrcache: initial timeo = %d\n", timeo);
|
|
#endif
|
|
|
|
if (vap->va_type == VDIR) {
|
|
if ((np->n_flag & NMODIFIED) || timeo < nmp->nm_acdirmin)
|
|
timeo = nmp->nm_acdirmin;
|
|
else if (timeo > nmp->nm_acdirmax)
|
|
timeo = nmp->nm_acdirmax;
|
|
} else {
|
|
if ((np->n_flag & NMODIFIED) || timeo < nmp->nm_acregmin)
|
|
timeo = nmp->nm_acregmin;
|
|
else if (timeo > nmp->nm_acregmax)
|
|
timeo = nmp->nm_acregmax;
|
|
}
|
|
|
|
#ifdef NFS_ACDEBUG
|
|
if (nfs_acdebug > 2)
|
|
nfs_printf("acregmin %d; acregmax %d; acdirmin %d; acdirmax %d\n",
|
|
nmp->nm_acregmin, nmp->nm_acregmax,
|
|
nmp->nm_acdirmin, nmp->nm_acdirmax);
|
|
|
|
if (nfs_acdebug)
|
|
nfs_printf("nfs_getattrcache: age = %d; final timeo = %d\n",
|
|
(time_second - np->n_attrstamp), timeo);
|
|
#endif
|
|
|
|
if ((time_second - np->n_attrstamp) >= timeo) {
|
|
nfsstats.attrcache_misses++;
|
|
mtx_unlock(&np->n_mtx);
|
|
return( ENOENT);
|
|
}
|
|
nfsstats.attrcache_hits++;
|
|
if (vap->va_size != np->n_size) {
|
|
if (vap->va_type == VREG) {
|
|
if (np->n_flag & NMODIFIED) {
|
|
if (vap->va_size < np->n_size)
|
|
vap->va_size = np->n_size;
|
|
else
|
|
np->n_size = vap->va_size;
|
|
} else {
|
|
np->n_size = vap->va_size;
|
|
}
|
|
vnode_pager_setsize(vp, np->n_size);
|
|
} else {
|
|
np->n_size = vap->va_size;
|
|
}
|
|
}
|
|
bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(struct vattr));
|
|
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;
|
|
}
|
|
mtx_unlock(&np->n_mtx);
|
|
#ifdef NFS_ACDEBUG
|
|
mtx_unlock(&Giant); /* nfs_printf() */
|
|
#endif
|
|
return (0);
|
|
}
|
|
|
|
static nfsuint64 nfs_nullcookie = { { 0, 0 } };
|
|
/*
|
|
* This function finds the directory cookie that corresponds to the
|
|
* logical byte offset given.
|
|
*/
|
|
nfsuint64 *
|
|
nfs_getcookie(struct nfsnode *np, off_t off, int add)
|
|
{
|
|
struct nfsdmap *dp, *dp2;
|
|
int pos;
|
|
nfsuint64 *retval = NULL;
|
|
|
|
pos = (uoff_t)off / NFS_DIRBLKSIZ;
|
|
if (pos == 0 || off < 0) {
|
|
#ifdef DIAGNOSTIC
|
|
if (add)
|
|
panic("nfs getcookie add at <= 0");
|
|
#endif
|
|
return (&nfs_nullcookie);
|
|
}
|
|
pos--;
|
|
dp = LIST_FIRST(&np->n_cookies);
|
|
if (!dp) {
|
|
if (add) {
|
|
MALLOC(dp, struct nfsdmap *, sizeof (struct nfsdmap),
|
|
M_NFSDIROFF, M_WAITOK);
|
|
dp->ndm_eocookie = 0;
|
|
LIST_INSERT_HEAD(&np->n_cookies, dp, ndm_list);
|
|
} else
|
|
goto out;
|
|
}
|
|
while (pos >= NFSNUMCOOKIES) {
|
|
pos -= NFSNUMCOOKIES;
|
|
if (LIST_NEXT(dp, ndm_list)) {
|
|
if (!add && dp->ndm_eocookie < NFSNUMCOOKIES &&
|
|
pos >= dp->ndm_eocookie)
|
|
goto out;
|
|
dp = LIST_NEXT(dp, ndm_list);
|
|
} else if (add) {
|
|
MALLOC(dp2, struct nfsdmap *, sizeof (struct nfsdmap),
|
|
M_NFSDIROFF, M_WAITOK);
|
|
dp2->ndm_eocookie = 0;
|
|
LIST_INSERT_AFTER(dp, dp2, ndm_list);
|
|
dp = dp2;
|
|
} else
|
|
goto out;
|
|
}
|
|
if (pos >= dp->ndm_eocookie) {
|
|
if (add)
|
|
dp->ndm_eocookie = pos + 1;
|
|
else
|
|
goto out;
|
|
}
|
|
retval = &dp->ndm_cookies[pos];
|
|
out:
|
|
return (retval);
|
|
}
|
|
|
|
/*
|
|
* Invalidate cached directory information, except for the actual directory
|
|
* blocks (which are invalidated separately).
|
|
* Done mainly to avoid the use of stale offset cookies.
|
|
*/
|
|
void
|
|
nfs_invaldir(struct vnode *vp)
|
|
{
|
|
struct nfsnode *np = VTONFS(vp);
|
|
|
|
#ifdef DIAGNOSTIC
|
|
if (vp->v_type != VDIR)
|
|
panic("nfs: invaldir not dir");
|
|
#endif
|
|
nfs_dircookie_lock(np);
|
|
np->n_direofoffset = 0;
|
|
np->n_cookieverf.nfsuquad[0] = 0;
|
|
np->n_cookieverf.nfsuquad[1] = 0;
|
|
if (LIST_FIRST(&np->n_cookies))
|
|
LIST_FIRST(&np->n_cookies)->ndm_eocookie = 0;
|
|
nfs_dircookie_unlock(np);
|
|
}
|
|
|
|
/*
|
|
* The write verifier has changed (probably due to a server reboot), so all
|
|
* B_NEEDCOMMIT blocks will have to be written again. Since they are on the
|
|
* dirty block list as B_DELWRI, all this takes is clearing the B_NEEDCOMMIT
|
|
* and B_CLUSTEROK flags. Once done the new write verifier can be set for the
|
|
* mount point.
|
|
*
|
|
* B_CLUSTEROK must be cleared along with B_NEEDCOMMIT because stage 1 data
|
|
* writes are not clusterable.
|
|
*/
|
|
void
|
|
nfs_clearcommit(struct mount *mp)
|
|
{
|
|
struct vnode *vp, *nvp;
|
|
struct buf *bp, *nbp;
|
|
struct bufobj *bo;
|
|
|
|
MNT_ILOCK(mp);
|
|
MNT_VNODE_FOREACH(vp, mp, nvp) {
|
|
bo = &vp->v_bufobj;
|
|
VI_LOCK(vp);
|
|
if (vp->v_iflag & VI_DOOMED) {
|
|
VI_UNLOCK(vp);
|
|
continue;
|
|
}
|
|
vholdl(vp);
|
|
VI_UNLOCK(vp);
|
|
MNT_IUNLOCK(mp);
|
|
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))
|
|
bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK);
|
|
}
|
|
BO_UNLOCK(bo);
|
|
vdrop(vp);
|
|
MNT_ILOCK(mp);
|
|
}
|
|
MNT_IUNLOCK(mp);
|
|
}
|
|
|
|
/*
|
|
* Helper functions for former macros. Some of these should be
|
|
* moved to their callers.
|
|
*/
|
|
|
|
int
|
|
nfsm_mtofh_xx(struct vnode *d, struct vnode **v, int v3, int *f,
|
|
struct mbuf **md, caddr_t *dpos)
|
|
{
|
|
struct nfsnode *ttnp;
|
|
struct vnode *ttvp;
|
|
nfsfh_t *ttfhp;
|
|
u_int32_t *tl;
|
|
int ttfhsize;
|
|
int t1;
|
|
|
|
if (v3) {
|
|
tl = nfsm_dissect_xx(NFSX_UNSIGNED, md, dpos);
|
|
if (tl == NULL)
|
|
return EBADRPC;
|
|
*f = fxdr_unsigned(int, *tl);
|
|
} else
|
|
*f = 1;
|
|
if (*f) {
|
|
t1 = nfsm_getfh_xx(&ttfhp, &ttfhsize, (v3), md, dpos);
|
|
if (t1 != 0)
|
|
return t1;
|
|
t1 = nfs_nget(d->v_mount, ttfhp, ttfhsize, &ttnp, LK_EXCLUSIVE);
|
|
if (t1 != 0)
|
|
return t1;
|
|
*v = NFSTOV(ttnp);
|
|
}
|
|
if (v3) {
|
|
tl = nfsm_dissect_xx(NFSX_UNSIGNED, md, dpos);
|
|
if (tl == NULL)
|
|
return EBADRPC;
|
|
if (*f)
|
|
*f = fxdr_unsigned(int, *tl);
|
|
else if (fxdr_unsigned(int, *tl))
|
|
nfsm_adv_xx(NFSX_V3FATTR, md, dpos);
|
|
}
|
|
if (*f) {
|
|
ttvp = *v;
|
|
t1 = nfs_loadattrcache(&ttvp, md, dpos, NULL, 0);
|
|
if (t1)
|
|
return t1;
|
|
*v = ttvp;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
nfsm_getfh_xx(nfsfh_t **f, int *s, int v3, struct mbuf **md, caddr_t *dpos)
|
|
{
|
|
u_int32_t *tl;
|
|
|
|
if (v3) {
|
|
tl = nfsm_dissect_xx(NFSX_UNSIGNED, md, dpos);
|
|
if (tl == NULL)
|
|
return EBADRPC;
|
|
*s = fxdr_unsigned(int, *tl);
|
|
if (*s <= 0 || *s > NFSX_V3FHMAX)
|
|
return EBADRPC;
|
|
} else
|
|
*s = NFSX_V2FH;
|
|
*f = nfsm_dissect_xx(nfsm_rndup(*s), md, dpos);
|
|
if (*f == NULL)
|
|
return EBADRPC;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
|
|
int
|
|
nfsm_loadattr_xx(struct vnode **v, struct vattr *va, struct mbuf **md,
|
|
caddr_t *dpos)
|
|
{
|
|
int t1;
|
|
|
|
struct vnode *ttvp = *v;
|
|
t1 = nfs_loadattrcache(&ttvp, md, dpos, va, 0);
|
|
if (t1 != 0)
|
|
return t1;
|
|
*v = ttvp;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
nfsm_postop_attr_xx(struct vnode **v, int *f, struct mbuf **md,
|
|
caddr_t *dpos)
|
|
{
|
|
u_int32_t *tl;
|
|
int t1;
|
|
|
|
struct vnode *ttvp = *v;
|
|
tl = nfsm_dissect_xx(NFSX_UNSIGNED, md, dpos);
|
|
if (tl == NULL)
|
|
return EBADRPC;
|
|
*f = fxdr_unsigned(int, *tl);
|
|
if (*f != 0) {
|
|
t1 = nfs_loadattrcache(&ttvp, md, dpos, NULL, 1);
|
|
if (t1 != 0) {
|
|
*f = 0;
|
|
return t1;
|
|
}
|
|
*v = ttvp;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
nfsm_wcc_data_xx(struct vnode **v, int *f, struct mbuf **md, caddr_t *dpos)
|
|
{
|
|
u_int32_t *tl;
|
|
int ttattrf, ttretf = 0;
|
|
int t1;
|
|
|
|
tl = nfsm_dissect_xx(NFSX_UNSIGNED, md, dpos);
|
|
if (tl == NULL)
|
|
return EBADRPC;
|
|
if (*tl == nfs_true) {
|
|
tl = nfsm_dissect_xx(6 * NFSX_UNSIGNED, md, dpos);
|
|
if (tl == NULL)
|
|
return EBADRPC;
|
|
mtx_lock(&(VTONFS(*v))->n_mtx);
|
|
if (*f)
|
|
ttretf = (VTONFS(*v)->n_mtime.tv_sec == fxdr_unsigned(u_int32_t, *(tl + 2)) &&
|
|
VTONFS(*v)->n_mtime.tv_nsec == fxdr_unsigned(u_int32_t, *(tl + 3)));
|
|
mtx_unlock(&(VTONFS(*v))->n_mtx);
|
|
}
|
|
t1 = nfsm_postop_attr_xx(v, &ttattrf, md, dpos);
|
|
if (t1)
|
|
return t1;
|
|
if (*f)
|
|
*f = ttretf;
|
|
else
|
|
*f = ttattrf;
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
nfsm_strtom_xx(const char *a, int s, int m, struct mbuf **mb, caddr_t *bpos)
|
|
{
|
|
u_int32_t *tl;
|
|
int t1;
|
|
|
|
if (s > m)
|
|
return ENAMETOOLONG;
|
|
t1 = nfsm_rndup(s) + NFSX_UNSIGNED;
|
|
if (t1 <= M_TRAILINGSPACE(*mb)) {
|
|
tl = nfsm_build_xx(t1, mb, bpos);
|
|
*tl++ = txdr_unsigned(s);
|
|
*(tl + ((t1 >> 2) - 2)) = 0;
|
|
bcopy(a, tl, s);
|
|
} else {
|
|
t1 = nfsm_strtmbuf(mb, bpos, a, s);
|
|
if (t1 != 0)
|
|
return t1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
nfsm_fhtom_xx(struct vnode *v, int v3, struct mbuf **mb, caddr_t *bpos)
|
|
{
|
|
u_int32_t *tl;
|
|
int t1;
|
|
caddr_t cp;
|
|
|
|
if (v3) {
|
|
t1 = nfsm_rndup(VTONFS(v)->n_fhsize) + NFSX_UNSIGNED;
|
|
if (t1 < M_TRAILINGSPACE(*mb)) {
|
|
tl = nfsm_build_xx(t1, mb, bpos);
|
|
*tl++ = txdr_unsigned(VTONFS(v)->n_fhsize);
|
|
*(tl + ((t1 >> 2) - 2)) = 0;
|
|
bcopy(VTONFS(v)->n_fhp, tl, VTONFS(v)->n_fhsize);
|
|
} else {
|
|
t1 = nfsm_strtmbuf(mb, bpos,
|
|
(const char *)VTONFS(v)->n_fhp,
|
|
VTONFS(v)->n_fhsize);
|
|
if (t1 != 0)
|
|
return t1;
|
|
}
|
|
} else {
|
|
cp = nfsm_build_xx(NFSX_V2FH, mb, bpos);
|
|
bcopy(VTONFS(v)->n_fhp, cp, NFSX_V2FH);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
nfsm_v3attrbuild_xx(struct vattr *va, int full, struct mbuf **mb,
|
|
caddr_t *bpos)
|
|
{
|
|
u_int32_t *tl;
|
|
|
|
if (va->va_mode != (mode_t)VNOVAL) {
|
|
tl = nfsm_build_xx(2 * NFSX_UNSIGNED, mb, bpos);
|
|
*tl++ = nfs_true;
|
|
*tl = txdr_unsigned(va->va_mode);
|
|
} else {
|
|
tl = nfsm_build_xx(NFSX_UNSIGNED, mb, bpos);
|
|
*tl = nfs_false;
|
|
}
|
|
if (full && va->va_uid != (uid_t)VNOVAL) {
|
|
tl = nfsm_build_xx(2 * NFSX_UNSIGNED, mb, bpos);
|
|
*tl++ = nfs_true;
|
|
*tl = txdr_unsigned(va->va_uid);
|
|
} else {
|
|
tl = nfsm_build_xx(NFSX_UNSIGNED, mb, bpos);
|
|
*tl = nfs_false;
|
|
}
|
|
if (full && va->va_gid != (gid_t)VNOVAL) {
|
|
tl = nfsm_build_xx(2 * NFSX_UNSIGNED, mb, bpos);
|
|
*tl++ = nfs_true;
|
|
*tl = txdr_unsigned(va->va_gid);
|
|
} else {
|
|
tl = nfsm_build_xx(NFSX_UNSIGNED, mb, bpos);
|
|
*tl = nfs_false;
|
|
}
|
|
if (full && va->va_size != VNOVAL) {
|
|
tl = nfsm_build_xx(3 * NFSX_UNSIGNED, mb, bpos);
|
|
*tl++ = nfs_true;
|
|
txdr_hyper(va->va_size, tl);
|
|
} else {
|
|
tl = nfsm_build_xx(NFSX_UNSIGNED, mb, bpos);
|
|
*tl = nfs_false;
|
|
}
|
|
if (va->va_atime.tv_sec != VNOVAL) {
|
|
if (va->va_atime.tv_sec != time_second) {
|
|
tl = nfsm_build_xx(3 * NFSX_UNSIGNED, mb, bpos);
|
|
*tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT);
|
|
txdr_nfsv3time(&va->va_atime, tl);
|
|
} else {
|
|
tl = nfsm_build_xx(NFSX_UNSIGNED, mb, bpos);
|
|
*tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER);
|
|
}
|
|
} else {
|
|
tl = nfsm_build_xx(NFSX_UNSIGNED, mb, bpos);
|
|
*tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE);
|
|
}
|
|
if (va->va_mtime.tv_sec != VNOVAL) {
|
|
if (va->va_mtime.tv_sec != time_second) {
|
|
tl = nfsm_build_xx(3 * NFSX_UNSIGNED, mb, bpos);
|
|
*tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT);
|
|
txdr_nfsv3time(&va->va_mtime, tl);
|
|
} else {
|
|
tl = nfsm_build_xx(NFSX_UNSIGNED, mb, bpos);
|
|
*tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER);
|
|
}
|
|
} else {
|
|
tl = nfsm_build_xx(NFSX_UNSIGNED, mb, bpos);
|
|
*tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE);
|
|
}
|
|
}
|