any thread doing an I/O RPC with a transfer size greater than NFS_UDPMAXDATA will be hung indefinitely, retrying the RPC. After a discussion on freebsd-fs@, I decided to add a warning message for this case, as suggested by Jeremy Chadwick. Suggested by: freebsd at jdc.parodius.com (Jeremy Chadwick) MFC after: 2 weeks
1580 lines
44 KiB
C
1580 lines
44 KiB
C
/*-
|
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* Copyright (c) 1989, 1993, 1995
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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_vfsops.c 8.12 (Berkeley) 5/20/95
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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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#include "opt_bootp.h"
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#include "opt_nfsroot.h"
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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/jail.h>
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#include <sys/limits.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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|
#include <sys/module.h>
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#include <sys/mount.h>
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#include <sys/proc.h>
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|
#include <sys/socket.h>
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#include <sys/socketvar.h>
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#include <sys/sockio.h>
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#include <sys/sysctl.h>
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#include <sys/syslog.h>
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#include <sys/vnode.h>
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#include <sys/signalvar.h>
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|
|
|
#include <vm/vm.h>
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#include <vm/vm_extern.h>
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#include <vm/uma.h>
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|
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#include <net/if.h>
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#include <net/route.h>
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#include <net/vnet.h>
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|
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|
#include <netinet/in.h>
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|
|
|
#include <rpc/rpc.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 <nfsclient/nfsmount.h>
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|
#include <nfs/xdr_subs.h>
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#include <nfsclient/nfsm_subs.h>
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#include <nfs/nfsdiskless.h>
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|
|
|
FEATURE(nfsclient, "NFS client");
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|
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MALLOC_DEFINE(M_NFSREQ, "nfsclient_req", "NFS request header");
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MALLOC_DEFINE(M_NFSBIGFH, "nfsclient_bigfh", "NFS version 3 file handle");
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MALLOC_DEFINE(M_NFSDIROFF, "nfsclient_diroff", "NFS directory offset data");
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|
MALLOC_DEFINE(M_NFSHASH, "nfsclient_hash", "NFS hash tables");
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MALLOC_DEFINE(M_NFSDIRECTIO, "nfsclient_directio", "NFS Direct IO async write state");
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|
|
|
uma_zone_t nfsmount_zone;
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|
|
|
struct nfsstats nfsstats;
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|
|
|
SYSCTL_NODE(_vfs, OID_AUTO, oldnfs, CTLFLAG_RW, 0, "Old NFS filesystem");
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SYSCTL_STRUCT(_vfs_oldnfs, NFS_NFSSTATS, nfsstats, CTLFLAG_RW,
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&nfsstats, nfsstats, "S,nfsstats");
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static int nfs_ip_paranoia = 1;
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SYSCTL_INT(_vfs_oldnfs, OID_AUTO, nfs_ip_paranoia, CTLFLAG_RW,
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&nfs_ip_paranoia, 0,
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"Disallow accepting replies from IPs which differ from those sent");
|
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#ifdef NFS_DEBUG
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int nfs_debug;
|
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SYSCTL_INT(_vfs_oldnfs, OID_AUTO, debug, CTLFLAG_RW, &nfs_debug, 0,
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"Toggle debug flag");
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|
#endif
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static int nfs_tprintf_initial_delay = NFS_TPRINTF_INITIAL_DELAY;
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SYSCTL_INT(_vfs_oldnfs, NFS_TPRINTF_INITIAL_DELAY,
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downdelayinitial, CTLFLAG_RW, &nfs_tprintf_initial_delay, 0,
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"Delay before printing \"nfs server not responding\" messages");
|
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/* how long between console messages "nfs server foo not responding" */
|
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static int nfs_tprintf_delay = NFS_TPRINTF_DELAY;
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SYSCTL_INT(_vfs_oldnfs, NFS_TPRINTF_DELAY,
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downdelayinterval, CTLFLAG_RW, &nfs_tprintf_delay, 0,
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|
"Delay between printing \"nfs server not responding\" messages");
|
|
|
|
static void nfs_decode_args(struct mount *mp, struct nfsmount *nmp,
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struct nfs_args *argp, const char *hostname);
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|
static int mountnfs(struct nfs_args *, struct mount *,
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struct sockaddr *, char *, struct vnode **,
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struct ucred *cred, int, int);
|
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static void nfs_getnlminfo(struct vnode *, uint8_t *, size_t *,
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struct sockaddr_storage *, int *, off_t *,
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|
struct timeval *);
|
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static vfs_mount_t nfs_mount;
|
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static vfs_cmount_t nfs_cmount;
|
|
static vfs_unmount_t nfs_unmount;
|
|
static vfs_root_t nfs_root;
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|
static vfs_statfs_t nfs_statfs;
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|
static vfs_sync_t nfs_sync;
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|
static vfs_sysctl_t nfs_sysctl;
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|
|
|
static int fake_wchan;
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|
|
|
/*
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* nfs vfs operations.
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*/
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static struct vfsops nfs_vfsops = {
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.vfs_init = nfs_init,
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.vfs_mount = nfs_mount,
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.vfs_cmount = nfs_cmount,
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.vfs_root = nfs_root,
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.vfs_statfs = nfs_statfs,
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|
.vfs_sync = nfs_sync,
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.vfs_uninit = nfs_uninit,
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.vfs_unmount = nfs_unmount,
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.vfs_sysctl = nfs_sysctl,
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|
};
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|
VFS_SET(nfs_vfsops, oldnfs, VFCF_NETWORK);
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|
|
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/* So that loader and kldload(2) can find us, wherever we are.. */
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MODULE_VERSION(oldnfs, 1);
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MODULE_DEPEND(oldnfs, krpc, 1, 1, 1);
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#ifdef KGSSAPI
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MODULE_DEPEND(oldnfs, kgssapi, 1, 1, 1);
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#endif
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MODULE_DEPEND(oldnfs, nfs_common, 1, 1, 1);
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MODULE_DEPEND(oldnfs, nfslock, 1, 1, 1);
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|
|
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static struct nfs_rpcops nfs_rpcops = {
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nfs_readrpc,
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nfs_writerpc,
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nfs_writebp,
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nfs_readlinkrpc,
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nfs_invaldir,
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nfs_commit,
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};
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|
|
|
/*
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|
* This structure is now defined in sys/nfs/nfs_diskless.c so that it
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* can be shared by both NFS clients. It is declared here so that it
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|
* will be defined for kernels built without NFS_ROOT, although it
|
|
* isn't used in that case.
|
|
*/
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|
#ifndef NFS_ROOT
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struct nfs_diskless nfs_diskless = { { { 0 } } };
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struct nfsv3_diskless nfsv3_diskless = { { { 0 } } };
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int nfs_diskless_valid = 0;
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#endif
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SYSCTL_INT(_vfs_oldnfs, OID_AUTO, diskless_valid, CTLFLAG_RD,
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&nfs_diskless_valid, 0,
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"Has the diskless struct been filled correctly");
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SYSCTL_STRING(_vfs_oldnfs, OID_AUTO, diskless_rootpath, CTLFLAG_RD,
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nfsv3_diskless.root_hostnam, 0, "Path to nfs root");
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|
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SYSCTL_OPAQUE(_vfs_oldnfs, OID_AUTO, diskless_rootaddr, CTLFLAG_RD,
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&nfsv3_diskless.root_saddr, sizeof nfsv3_diskless.root_saddr,
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"%Ssockaddr_in", "Diskless root nfs address");
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|
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void nfsargs_ntoh(struct nfs_args *);
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static int nfs_mountdiskless(char *,
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struct sockaddr_in *, struct nfs_args *,
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struct thread *, struct vnode **, struct mount *);
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static void nfs_convert_diskless(void);
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static void nfs_convert_oargs(struct nfs_args *args,
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struct onfs_args *oargs);
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int
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nfs_iosize(struct nfsmount *nmp)
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{
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int iosize;
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|
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/*
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* Calculate the size used for io buffers. Use the larger
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* of the two sizes to minimise nfs requests but make sure
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* that it is at least one VM page to avoid wasting buffer
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* space.
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|
*/
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iosize = imax(nmp->nm_rsize, nmp->nm_wsize);
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iosize = imax(iosize, PAGE_SIZE);
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return (iosize);
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}
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|
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static void
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nfs_convert_oargs(struct nfs_args *args, struct onfs_args *oargs)
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{
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args->version = NFS_ARGSVERSION;
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args->addr = oargs->addr;
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args->addrlen = oargs->addrlen;
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args->sotype = oargs->sotype;
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args->proto = oargs->proto;
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args->fh = oargs->fh;
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args->fhsize = oargs->fhsize;
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args->flags = oargs->flags;
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args->wsize = oargs->wsize;
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args->rsize = oargs->rsize;
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args->readdirsize = oargs->readdirsize;
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args->timeo = oargs->timeo;
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args->retrans = oargs->retrans;
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args->maxgrouplist = oargs->maxgrouplist;
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args->readahead = oargs->readahead;
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args->deadthresh = oargs->deadthresh;
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args->hostname = oargs->hostname;
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}
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static void
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nfs_convert_diskless(void)
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{
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bcopy(&nfs_diskless.myif, &nfsv3_diskless.myif,
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sizeof(struct ifaliasreq));
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bcopy(&nfs_diskless.mygateway, &nfsv3_diskless.mygateway,
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sizeof(struct sockaddr_in));
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nfs_convert_oargs(&nfsv3_diskless.root_args,&nfs_diskless.root_args);
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if (nfsv3_diskless.root_args.flags & NFSMNT_NFSV3) {
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nfsv3_diskless.root_fhsize = NFSX_V3FH;
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bcopy(nfs_diskless.root_fh, nfsv3_diskless.root_fh, NFSX_V3FH);
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} else {
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nfsv3_diskless.root_fhsize = NFSX_V2FH;
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bcopy(nfs_diskless.root_fh, nfsv3_diskless.root_fh, NFSX_V2FH);
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}
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bcopy(&nfs_diskless.root_saddr,&nfsv3_diskless.root_saddr,
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sizeof(struct sockaddr_in));
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bcopy(nfs_diskless.root_hostnam, nfsv3_diskless.root_hostnam, MNAMELEN);
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nfsv3_diskless.root_time = nfs_diskless.root_time;
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bcopy(nfs_diskless.my_hostnam, nfsv3_diskless.my_hostnam,
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MAXHOSTNAMELEN);
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nfs_diskless_valid = 3;
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}
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|
|
/*
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* nfs statfs call
|
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*/
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static int
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nfs_statfs(struct mount *mp, struct statfs *sbp)
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{
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struct vnode *vp;
|
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struct thread *td;
|
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struct nfs_statfs *sfp;
|
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caddr_t bpos, dpos;
|
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struct nfsmount *nmp = VFSTONFS(mp);
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int error = 0, v3 = (nmp->nm_flag & NFSMNT_NFSV3), retattr;
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struct mbuf *mreq, *mrep, *md, *mb;
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struct nfsnode *np;
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u_quad_t tquad;
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|
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td = curthread;
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#ifndef nolint
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sfp = NULL;
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#endif
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error = vfs_busy(mp, MBF_NOWAIT);
|
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if (error)
|
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return (error);
|
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error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np, LK_EXCLUSIVE);
|
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if (error) {
|
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vfs_unbusy(mp);
|
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return (error);
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}
|
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vp = NFSTOV(np);
|
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mtx_lock(&nmp->nm_mtx);
|
|
if (v3 && (nmp->nm_state & NFSSTA_GOTFSINFO) == 0) {
|
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mtx_unlock(&nmp->nm_mtx);
|
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(void)nfs_fsinfo(nmp, vp, td->td_ucred, td);
|
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} else
|
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mtx_unlock(&nmp->nm_mtx);
|
|
nfsstats.rpccnt[NFSPROC_FSSTAT]++;
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mreq = nfsm_reqhead(vp, NFSPROC_FSSTAT, NFSX_FH(v3));
|
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mb = mreq;
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bpos = mtod(mb, caddr_t);
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nfsm_fhtom(vp, v3);
|
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nfsm_request(vp, NFSPROC_FSSTAT, td, td->td_ucred);
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if (v3)
|
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nfsm_postop_attr(vp, retattr);
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if (error) {
|
|
if (mrep != NULL)
|
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m_freem(mrep);
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goto nfsmout;
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|
}
|
|
sfp = nfsm_dissect(struct nfs_statfs *, NFSX_STATFS(v3));
|
|
mtx_lock(&nmp->nm_mtx);
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|
sbp->f_iosize = nfs_iosize(nmp);
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
if (v3) {
|
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sbp->f_bsize = NFS_FABLKSIZE;
|
|
tquad = fxdr_hyper(&sfp->sf_tbytes);
|
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sbp->f_blocks = tquad / NFS_FABLKSIZE;
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|
tquad = fxdr_hyper(&sfp->sf_fbytes);
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sbp->f_bfree = tquad / NFS_FABLKSIZE;
|
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tquad = fxdr_hyper(&sfp->sf_abytes);
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sbp->f_bavail = tquad / NFS_FABLKSIZE;
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sbp->f_files = (fxdr_unsigned(int32_t,
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sfp->sf_tfiles.nfsuquad[1]) & 0x7fffffff);
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|
sbp->f_ffree = (fxdr_unsigned(int32_t,
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|
sfp->sf_ffiles.nfsuquad[1]) & 0x7fffffff);
|
|
} else {
|
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sbp->f_bsize = fxdr_unsigned(int32_t, sfp->sf_bsize);
|
|
sbp->f_blocks = fxdr_unsigned(int32_t, sfp->sf_blocks);
|
|
sbp->f_bfree = fxdr_unsigned(int32_t, sfp->sf_bfree);
|
|
sbp->f_bavail = fxdr_unsigned(int32_t, sfp->sf_bavail);
|
|
sbp->f_files = 0;
|
|
sbp->f_ffree = 0;
|
|
}
|
|
m_freem(mrep);
|
|
nfsmout:
|
|
vput(vp);
|
|
vfs_unbusy(mp);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* nfs version 3 fsinfo rpc call
|
|
*/
|
|
int
|
|
nfs_fsinfo(struct nfsmount *nmp, struct vnode *vp, struct ucred *cred,
|
|
struct thread *td)
|
|
{
|
|
struct nfsv3_fsinfo *fsp;
|
|
u_int32_t pref, max;
|
|
caddr_t bpos, dpos;
|
|
int error = 0, retattr;
|
|
struct mbuf *mreq, *mrep, *md, *mb;
|
|
u_int64_t maxfsize;
|
|
|
|
nfsstats.rpccnt[NFSPROC_FSINFO]++;
|
|
mreq = nfsm_reqhead(vp, NFSPROC_FSINFO, NFSX_FH(1));
|
|
mb = mreq;
|
|
bpos = mtod(mb, caddr_t);
|
|
nfsm_fhtom(vp, 1);
|
|
nfsm_request(vp, NFSPROC_FSINFO, td, cred);
|
|
nfsm_postop_attr(vp, retattr);
|
|
if (!error) {
|
|
fsp = nfsm_dissect(struct nfsv3_fsinfo *, NFSX_V3FSINFO);
|
|
pref = fxdr_unsigned(u_int32_t, fsp->fs_wtpref);
|
|
mtx_lock(&nmp->nm_mtx);
|
|
if (pref < nmp->nm_wsize && pref >= NFS_FABLKSIZE)
|
|
nmp->nm_wsize = (pref + NFS_FABLKSIZE - 1) &
|
|
~(NFS_FABLKSIZE - 1);
|
|
max = fxdr_unsigned(u_int32_t, fsp->fs_wtmax);
|
|
if (max < nmp->nm_wsize && max > 0) {
|
|
nmp->nm_wsize = max & ~(NFS_FABLKSIZE - 1);
|
|
if (nmp->nm_wsize == 0)
|
|
nmp->nm_wsize = max;
|
|
}
|
|
pref = fxdr_unsigned(u_int32_t, fsp->fs_rtpref);
|
|
if (pref < nmp->nm_rsize && pref >= NFS_FABLKSIZE)
|
|
nmp->nm_rsize = (pref + NFS_FABLKSIZE - 1) &
|
|
~(NFS_FABLKSIZE - 1);
|
|
max = fxdr_unsigned(u_int32_t, fsp->fs_rtmax);
|
|
if (max < nmp->nm_rsize && max > 0) {
|
|
nmp->nm_rsize = max & ~(NFS_FABLKSIZE - 1);
|
|
if (nmp->nm_rsize == 0)
|
|
nmp->nm_rsize = max;
|
|
}
|
|
pref = fxdr_unsigned(u_int32_t, fsp->fs_dtpref);
|
|
if (pref < nmp->nm_readdirsize && pref >= NFS_DIRBLKSIZ)
|
|
nmp->nm_readdirsize = (pref + NFS_DIRBLKSIZ - 1) &
|
|
~(NFS_DIRBLKSIZ - 1);
|
|
if (max < nmp->nm_readdirsize && max > 0) {
|
|
nmp->nm_readdirsize = max & ~(NFS_DIRBLKSIZ - 1);
|
|
if (nmp->nm_readdirsize == 0)
|
|
nmp->nm_readdirsize = max;
|
|
}
|
|
maxfsize = fxdr_hyper(&fsp->fs_maxfilesize);
|
|
if (maxfsize > 0 && maxfsize < nmp->nm_maxfilesize)
|
|
nmp->nm_maxfilesize = maxfsize;
|
|
nmp->nm_mountp->mnt_stat.f_iosize = nfs_iosize(nmp);
|
|
nmp->nm_state |= NFSSTA_GOTFSINFO;
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
}
|
|
m_freem(mrep);
|
|
nfsmout:
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Mount a remote root fs via. nfs. This depends on the info in the
|
|
* nfs_diskless structure that has been filled in properly by some primary
|
|
* bootstrap.
|
|
* It goes something like this:
|
|
* - do enough of "ifconfig" by calling ifioctl() so that the system
|
|
* can talk to the server
|
|
* - If nfs_diskless.mygateway is filled in, use that address as
|
|
* a default gateway.
|
|
* - build the rootfs mount point and call mountnfs() to do the rest.
|
|
*
|
|
* It is assumed to be safe to read, modify, and write the nfsv3_diskless
|
|
* structure, as well as other global NFS client variables here, as
|
|
* nfs_mountroot() will be called once in the boot before any other NFS
|
|
* client activity occurs.
|
|
*/
|
|
int
|
|
nfs_mountroot(struct mount *mp)
|
|
{
|
|
struct thread *td = curthread;
|
|
struct nfsv3_diskless *nd = &nfsv3_diskless;
|
|
struct socket *so;
|
|
struct vnode *vp;
|
|
struct ifreq ir;
|
|
int error;
|
|
u_long l;
|
|
char buf[128];
|
|
char *cp;
|
|
|
|
|
|
#if defined(BOOTP_NFSROOT) && defined(BOOTP)
|
|
bootpc_init(); /* use bootp to get nfs_diskless filled in */
|
|
#elif defined(NFS_ROOT)
|
|
nfs_setup_diskless();
|
|
#endif
|
|
|
|
if (nfs_diskless_valid == 0) {
|
|
return (-1);
|
|
}
|
|
if (nfs_diskless_valid == 1)
|
|
nfs_convert_diskless();
|
|
|
|
/*
|
|
* XXX splnet, so networks will receive...
|
|
*/
|
|
splnet();
|
|
|
|
/*
|
|
* Do enough of ifconfig(8) so that the critical net interface can
|
|
* talk to the server.
|
|
*/
|
|
error = socreate(nd->myif.ifra_addr.sa_family, &so, nd->root_args.sotype, 0,
|
|
td->td_ucred, td);
|
|
if (error)
|
|
panic("nfs_mountroot: socreate(%04x): %d",
|
|
nd->myif.ifra_addr.sa_family, error);
|
|
|
|
#if 0 /* XXX Bad idea */
|
|
/*
|
|
* We might not have been told the right interface, so we pass
|
|
* over the first ten interfaces of the same kind, until we get
|
|
* one of them configured.
|
|
*/
|
|
|
|
for (i = strlen(nd->myif.ifra_name) - 1;
|
|
nd->myif.ifra_name[i] >= '0' &&
|
|
nd->myif.ifra_name[i] <= '9';
|
|
nd->myif.ifra_name[i] ++) {
|
|
error = ifioctl(so, SIOCAIFADDR, (caddr_t)&nd->myif, td);
|
|
if(!error)
|
|
break;
|
|
}
|
|
#endif
|
|
|
|
error = ifioctl(so, SIOCAIFADDR, (caddr_t)&nd->myif, td);
|
|
if (error)
|
|
panic("nfs_mountroot: SIOCAIFADDR: %d", error);
|
|
|
|
if ((cp = getenv("boot.netif.mtu")) != NULL) {
|
|
ir.ifr_mtu = strtol(cp, NULL, 10);
|
|
bcopy(nd->myif.ifra_name, ir.ifr_name, IFNAMSIZ);
|
|
freeenv(cp);
|
|
error = ifioctl(so, SIOCSIFMTU, (caddr_t)&ir, td);
|
|
if (error)
|
|
printf("nfs_mountroot: SIOCSIFMTU: %d", error);
|
|
}
|
|
soclose(so);
|
|
|
|
/*
|
|
* If the gateway field is filled in, set it as the default route.
|
|
* Note that pxeboot will set a default route of 0 if the route
|
|
* is not set by the DHCP server. Check also for a value of 0
|
|
* to avoid panicking inappropriately in that situation.
|
|
*/
|
|
if (nd->mygateway.sin_len != 0 &&
|
|
nd->mygateway.sin_addr.s_addr != 0) {
|
|
struct sockaddr_in mask, sin;
|
|
|
|
bzero((caddr_t)&mask, sizeof(mask));
|
|
sin = mask;
|
|
sin.sin_family = AF_INET;
|
|
sin.sin_len = sizeof(sin);
|
|
/* XXX MRT use table 0 for this sort of thing */
|
|
CURVNET_SET(TD_TO_VNET(td));
|
|
error = rtrequest(RTM_ADD, (struct sockaddr *)&sin,
|
|
(struct sockaddr *)&nd->mygateway,
|
|
(struct sockaddr *)&mask,
|
|
RTF_UP | RTF_GATEWAY, NULL);
|
|
CURVNET_RESTORE();
|
|
if (error)
|
|
panic("nfs_mountroot: RTM_ADD: %d", error);
|
|
}
|
|
|
|
/*
|
|
* Create the rootfs mount point.
|
|
*/
|
|
nd->root_args.fh = nd->root_fh;
|
|
nd->root_args.fhsize = nd->root_fhsize;
|
|
l = ntohl(nd->root_saddr.sin_addr.s_addr);
|
|
snprintf(buf, sizeof(buf), "%ld.%ld.%ld.%ld:%s",
|
|
(l >> 24) & 0xff, (l >> 16) & 0xff,
|
|
(l >> 8) & 0xff, (l >> 0) & 0xff, nd->root_hostnam);
|
|
printf("NFS ROOT: %s\n", buf);
|
|
nd->root_args.hostname = buf;
|
|
if ((error = nfs_mountdiskless(buf,
|
|
&nd->root_saddr, &nd->root_args, td, &vp, mp)) != 0) {
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* This is not really an nfs issue, but it is much easier to
|
|
* set hostname here and then let the "/etc/rc.xxx" files
|
|
* mount the right /var based upon its preset value.
|
|
*/
|
|
mtx_lock(&prison0.pr_mtx);
|
|
strlcpy(prison0.pr_hostname, nd->my_hostnam,
|
|
sizeof (prison0.pr_hostname));
|
|
mtx_unlock(&prison0.pr_mtx);
|
|
inittodr(ntohl(nd->root_time));
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Internal version of mount system call for diskless setup.
|
|
*/
|
|
static int
|
|
nfs_mountdiskless(char *path,
|
|
struct sockaddr_in *sin, struct nfs_args *args, struct thread *td,
|
|
struct vnode **vpp, struct mount *mp)
|
|
{
|
|
struct sockaddr *nam;
|
|
int error;
|
|
|
|
nam = sodupsockaddr((struct sockaddr *)sin, M_WAITOK);
|
|
if ((error = mountnfs(args, mp, nam, path, vpp, td->td_ucred,
|
|
NFS_DEFAULT_NAMETIMEO, NFS_DEFAULT_NEGNAMETIMEO)) != 0) {
|
|
printf("nfs_mountroot: mount %s on /: %d\n", path, error);
|
|
return (error);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
nfs_sec_name_to_num(char *sec)
|
|
{
|
|
if (!strcmp(sec, "krb5"))
|
|
return (RPCSEC_GSS_KRB5);
|
|
if (!strcmp(sec, "krb5i"))
|
|
return (RPCSEC_GSS_KRB5I);
|
|
if (!strcmp(sec, "krb5p"))
|
|
return (RPCSEC_GSS_KRB5P);
|
|
if (!strcmp(sec, "sys"))
|
|
return (AUTH_SYS);
|
|
/*
|
|
* Userland should validate the string but we will try and
|
|
* cope with unexpected values.
|
|
*/
|
|
return (AUTH_SYS);
|
|
}
|
|
|
|
static void
|
|
nfs_decode_args(struct mount *mp, struct nfsmount *nmp, struct nfs_args *argp,
|
|
const char *hostname)
|
|
{
|
|
int s;
|
|
int adjsock;
|
|
int maxio;
|
|
char *p;
|
|
char *secname;
|
|
char *principal;
|
|
|
|
s = splnet();
|
|
|
|
/*
|
|
* Set read-only flag if requested; otherwise, clear it if this is
|
|
* an update. If this is not an update, then either the read-only
|
|
* flag is already clear, or this is a root mount and it was set
|
|
* intentionally at some previous point.
|
|
*/
|
|
if (vfs_getopt(mp->mnt_optnew, "ro", NULL, NULL) == 0) {
|
|
MNT_ILOCK(mp);
|
|
mp->mnt_flag |= MNT_RDONLY;
|
|
MNT_IUNLOCK(mp);
|
|
} else if (mp->mnt_flag & MNT_UPDATE) {
|
|
MNT_ILOCK(mp);
|
|
mp->mnt_flag &= ~MNT_RDONLY;
|
|
MNT_IUNLOCK(mp);
|
|
}
|
|
|
|
/*
|
|
* Silently clear NFSMNT_NOCONN if it's a TCP mount, it makes
|
|
* no sense in that context. Also, set up appropriate retransmit
|
|
* and soft timeout behavior.
|
|
*/
|
|
if (argp->sotype == SOCK_STREAM) {
|
|
nmp->nm_flag &= ~NFSMNT_NOCONN;
|
|
nmp->nm_flag |= NFSMNT_DUMBTIMR;
|
|
nmp->nm_timeo = NFS_MAXTIMEO;
|
|
nmp->nm_retry = NFS_RETRANS_TCP;
|
|
}
|
|
|
|
/* Also clear RDIRPLUS if not NFSv3, it crashes some servers */
|
|
if ((argp->flags & NFSMNT_NFSV3) == 0)
|
|
nmp->nm_flag &= ~NFSMNT_RDIRPLUS;
|
|
|
|
/* Re-bind if rsrvd port requested and wasn't on one */
|
|
adjsock = !(nmp->nm_flag & NFSMNT_RESVPORT)
|
|
&& (argp->flags & NFSMNT_RESVPORT);
|
|
/* Also re-bind if we're switching to/from a connected UDP socket */
|
|
adjsock |= ((nmp->nm_flag & NFSMNT_NOCONN) !=
|
|
(argp->flags & NFSMNT_NOCONN));
|
|
|
|
/* Update flags atomically. Don't change the lock bits. */
|
|
nmp->nm_flag = argp->flags | nmp->nm_flag;
|
|
splx(s);
|
|
|
|
if ((argp->flags & NFSMNT_TIMEO) && argp->timeo > 0) {
|
|
nmp->nm_timeo = (argp->timeo * NFS_HZ + 5) / 10;
|
|
if (nmp->nm_timeo < NFS_MINTIMEO)
|
|
nmp->nm_timeo = NFS_MINTIMEO;
|
|
else if (nmp->nm_timeo > NFS_MAXTIMEO)
|
|
nmp->nm_timeo = NFS_MAXTIMEO;
|
|
}
|
|
|
|
if ((argp->flags & NFSMNT_RETRANS) && argp->retrans > 1) {
|
|
nmp->nm_retry = argp->retrans;
|
|
if (nmp->nm_retry > NFS_MAXREXMIT)
|
|
nmp->nm_retry = NFS_MAXREXMIT;
|
|
}
|
|
|
|
if (argp->flags & NFSMNT_NFSV3) {
|
|
if (argp->sotype == SOCK_DGRAM)
|
|
maxio = NFS_MAXDGRAMDATA;
|
|
else
|
|
maxio = NFS_MAXDATA;
|
|
} else
|
|
maxio = NFS_V2MAXDATA;
|
|
|
|
if ((argp->flags & NFSMNT_WSIZE) && argp->wsize > 0) {
|
|
nmp->nm_wsize = argp->wsize;
|
|
/* Round down to multiple of blocksize */
|
|
nmp->nm_wsize &= ~(NFS_FABLKSIZE - 1);
|
|
if (nmp->nm_wsize <= 0)
|
|
nmp->nm_wsize = NFS_FABLKSIZE;
|
|
}
|
|
if (nmp->nm_wsize > maxio)
|
|
nmp->nm_wsize = maxio;
|
|
if (nmp->nm_wsize > MAXBSIZE)
|
|
nmp->nm_wsize = MAXBSIZE;
|
|
|
|
if ((argp->flags & NFSMNT_RSIZE) && argp->rsize > 0) {
|
|
nmp->nm_rsize = argp->rsize;
|
|
/* Round down to multiple of blocksize */
|
|
nmp->nm_rsize &= ~(NFS_FABLKSIZE - 1);
|
|
if (nmp->nm_rsize <= 0)
|
|
nmp->nm_rsize = NFS_FABLKSIZE;
|
|
}
|
|
if (nmp->nm_rsize > maxio)
|
|
nmp->nm_rsize = maxio;
|
|
if (nmp->nm_rsize > MAXBSIZE)
|
|
nmp->nm_rsize = MAXBSIZE;
|
|
|
|
if ((argp->flags & NFSMNT_READDIRSIZE) && argp->readdirsize > 0) {
|
|
nmp->nm_readdirsize = argp->readdirsize;
|
|
}
|
|
if (nmp->nm_readdirsize > maxio)
|
|
nmp->nm_readdirsize = maxio;
|
|
if (nmp->nm_readdirsize > nmp->nm_rsize)
|
|
nmp->nm_readdirsize = nmp->nm_rsize;
|
|
|
|
if ((argp->flags & NFSMNT_ACREGMIN) && argp->acregmin >= 0)
|
|
nmp->nm_acregmin = argp->acregmin;
|
|
else
|
|
nmp->nm_acregmin = NFS_MINATTRTIMO;
|
|
if ((argp->flags & NFSMNT_ACREGMAX) && argp->acregmax >= 0)
|
|
nmp->nm_acregmax = argp->acregmax;
|
|
else
|
|
nmp->nm_acregmax = NFS_MAXATTRTIMO;
|
|
if ((argp->flags & NFSMNT_ACDIRMIN) && argp->acdirmin >= 0)
|
|
nmp->nm_acdirmin = argp->acdirmin;
|
|
else
|
|
nmp->nm_acdirmin = NFS_MINDIRATTRTIMO;
|
|
if ((argp->flags & NFSMNT_ACDIRMAX) && argp->acdirmax >= 0)
|
|
nmp->nm_acdirmax = argp->acdirmax;
|
|
else
|
|
nmp->nm_acdirmax = NFS_MAXDIRATTRTIMO;
|
|
if (nmp->nm_acdirmin > nmp->nm_acdirmax)
|
|
nmp->nm_acdirmin = nmp->nm_acdirmax;
|
|
if (nmp->nm_acregmin > nmp->nm_acregmax)
|
|
nmp->nm_acregmin = nmp->nm_acregmax;
|
|
|
|
if ((argp->flags & NFSMNT_MAXGRPS) && argp->maxgrouplist >= 0) {
|
|
if (argp->maxgrouplist <= NFS_MAXGRPS)
|
|
nmp->nm_numgrps = argp->maxgrouplist;
|
|
else
|
|
nmp->nm_numgrps = NFS_MAXGRPS;
|
|
}
|
|
if ((argp->flags & NFSMNT_READAHEAD) && argp->readahead >= 0) {
|
|
if (argp->readahead <= NFS_MAXRAHEAD)
|
|
nmp->nm_readahead = argp->readahead;
|
|
else
|
|
nmp->nm_readahead = NFS_MAXRAHEAD;
|
|
}
|
|
if ((argp->flags & NFSMNT_WCOMMITSIZE) && argp->wcommitsize >= 0) {
|
|
if (argp->wcommitsize < nmp->nm_wsize)
|
|
nmp->nm_wcommitsize = nmp->nm_wsize;
|
|
else
|
|
nmp->nm_wcommitsize = argp->wcommitsize;
|
|
}
|
|
if ((argp->flags & NFSMNT_DEADTHRESH) && argp->deadthresh >= 0) {
|
|
if (argp->deadthresh <= NFS_MAXDEADTHRESH)
|
|
nmp->nm_deadthresh = argp->deadthresh;
|
|
else
|
|
nmp->nm_deadthresh = NFS_MAXDEADTHRESH;
|
|
}
|
|
|
|
adjsock |= ((nmp->nm_sotype != argp->sotype) ||
|
|
(nmp->nm_soproto != argp->proto));
|
|
nmp->nm_sotype = argp->sotype;
|
|
nmp->nm_soproto = argp->proto;
|
|
|
|
if (nmp->nm_client && adjsock) {
|
|
nfs_safedisconnect(nmp);
|
|
if (nmp->nm_sotype == SOCK_DGRAM)
|
|
while (nfs_connect(nmp)) {
|
|
printf("nfs_args: retrying connect\n");
|
|
(void) tsleep(&fake_wchan, PSOCK, "nfscon", hz);
|
|
}
|
|
}
|
|
|
|
if (hostname) {
|
|
strlcpy(nmp->nm_hostname, hostname,
|
|
sizeof(nmp->nm_hostname));
|
|
p = strchr(nmp->nm_hostname, ':');
|
|
if (p)
|
|
*p = '\0';
|
|
}
|
|
|
|
if (vfs_getopt(mp->mnt_optnew, "sec",
|
|
(void **) &secname, NULL) == 0) {
|
|
nmp->nm_secflavor = nfs_sec_name_to_num(secname);
|
|
} else {
|
|
nmp->nm_secflavor = AUTH_SYS;
|
|
}
|
|
|
|
if (vfs_getopt(mp->mnt_optnew, "principal",
|
|
(void **) &principal, NULL) == 0) {
|
|
strlcpy(nmp->nm_principal, principal,
|
|
sizeof(nmp->nm_principal));
|
|
} else {
|
|
snprintf(nmp->nm_principal, sizeof(nmp->nm_principal),
|
|
"nfs@%s", nmp->nm_hostname);
|
|
}
|
|
}
|
|
|
|
static const char *nfs_opts[] = { "from", "nfs_args",
|
|
"noatime", "noexec", "suiddir", "nosuid", "nosymfollow", "union",
|
|
"noclusterr", "noclusterw", "multilabel", "acls", "force", "update",
|
|
"async", "dumbtimer", "noconn", "nolockd", "intr", "rdirplus", "resvport",
|
|
"readahead", "readdirsize", "soft", "hard", "mntudp", "tcp", "udp",
|
|
"wsize", "rsize", "retrans", "acregmin", "acregmax", "acdirmin",
|
|
"acdirmax", "deadthresh", "hostname", "timeout", "addr", "fh", "nfsv3",
|
|
"sec", "maxgroups", "principal", "negnametimeo", "nocto", "wcommitsize",
|
|
"nametimeo",
|
|
NULL };
|
|
|
|
/*
|
|
* VFS Operations.
|
|
*
|
|
* mount system call
|
|
* It seems a bit dumb to copyinstr() the host and path here and then
|
|
* bcopy() them in mountnfs(), but I wanted to detect errors before
|
|
* doing the sockargs() call because sockargs() allocates an mbuf and
|
|
* an error after that means that I have to release the mbuf.
|
|
*/
|
|
/* ARGSUSED */
|
|
static int
|
|
nfs_mount(struct mount *mp)
|
|
{
|
|
struct nfs_args args = {
|
|
.version = NFS_ARGSVERSION,
|
|
.addr = NULL,
|
|
.addrlen = sizeof (struct sockaddr_in),
|
|
.sotype = SOCK_STREAM,
|
|
.proto = 0,
|
|
.fh = NULL,
|
|
.fhsize = 0,
|
|
.flags = NFSMNT_RESVPORT,
|
|
.wsize = NFS_WSIZE,
|
|
.rsize = NFS_RSIZE,
|
|
.readdirsize = NFS_READDIRSIZE,
|
|
.timeo = 10,
|
|
.retrans = NFS_RETRANS,
|
|
.maxgrouplist = NFS_MAXGRPS,
|
|
.readahead = NFS_DEFRAHEAD,
|
|
.wcommitsize = 0, /* was: NQ_DEFLEASE */
|
|
.deadthresh = NFS_MAXDEADTHRESH, /* was: NQ_DEADTHRESH */
|
|
.hostname = NULL,
|
|
/* args version 4 */
|
|
.acregmin = NFS_MINATTRTIMO,
|
|
.acregmax = NFS_MAXATTRTIMO,
|
|
.acdirmin = NFS_MINDIRATTRTIMO,
|
|
.acdirmax = NFS_MAXDIRATTRTIMO,
|
|
};
|
|
int error, ret, has_nfs_args_opt;
|
|
int has_addr_opt, has_fh_opt, has_hostname_opt;
|
|
struct sockaddr *nam;
|
|
struct vnode *vp;
|
|
char hst[MNAMELEN];
|
|
size_t len;
|
|
u_char nfh[NFSX_V3FHMAX];
|
|
char *opt;
|
|
int nametimeo = NFS_DEFAULT_NAMETIMEO;
|
|
int negnametimeo = NFS_DEFAULT_NEGNAMETIMEO;
|
|
|
|
has_nfs_args_opt = 0;
|
|
has_addr_opt = 0;
|
|
has_fh_opt = 0;
|
|
has_hostname_opt = 0;
|
|
|
|
if (vfs_filteropt(mp->mnt_optnew, nfs_opts)) {
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if ((mp->mnt_flag & (MNT_ROOTFS | MNT_UPDATE)) == MNT_ROOTFS) {
|
|
error = nfs_mountroot(mp);
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* The old mount_nfs program passed the struct nfs_args
|
|
* from userspace to kernel. The new mount_nfs program
|
|
* passes string options via nmount() from userspace to kernel
|
|
* and we populate the struct nfs_args in the kernel.
|
|
*/
|
|
if (vfs_getopt(mp->mnt_optnew, "nfs_args", NULL, NULL) == 0) {
|
|
error = vfs_copyopt(mp->mnt_optnew, "nfs_args", &args,
|
|
sizeof args);
|
|
if (error)
|
|
goto out;
|
|
|
|
if (args.version != NFS_ARGSVERSION) {
|
|
error = EPROGMISMATCH;
|
|
goto out;
|
|
}
|
|
has_nfs_args_opt = 1;
|
|
}
|
|
|
|
if (vfs_getopt(mp->mnt_optnew, "dumbtimer", NULL, NULL) == 0)
|
|
args.flags |= NFSMNT_DUMBTIMR;
|
|
if (vfs_getopt(mp->mnt_optnew, "noconn", NULL, NULL) == 0)
|
|
args.flags |= NFSMNT_NOCONN;
|
|
if (vfs_getopt(mp->mnt_optnew, "conn", NULL, NULL) == 0)
|
|
args.flags |= NFSMNT_NOCONN;
|
|
if (vfs_getopt(mp->mnt_optnew, "nolockd", NULL, NULL) == 0)
|
|
args.flags |= NFSMNT_NOLOCKD;
|
|
if (vfs_getopt(mp->mnt_optnew, "lockd", NULL, NULL) == 0)
|
|
args.flags &= ~NFSMNT_NOLOCKD;
|
|
if (vfs_getopt(mp->mnt_optnew, "intr", NULL, NULL) == 0)
|
|
args.flags |= NFSMNT_INT;
|
|
if (vfs_getopt(mp->mnt_optnew, "rdirplus", NULL, NULL) == 0)
|
|
args.flags |= NFSMNT_RDIRPLUS;
|
|
if (vfs_getopt(mp->mnt_optnew, "resvport", NULL, NULL) == 0)
|
|
args.flags |= NFSMNT_RESVPORT;
|
|
if (vfs_getopt(mp->mnt_optnew, "noresvport", NULL, NULL) == 0)
|
|
args.flags &= ~NFSMNT_RESVPORT;
|
|
if (vfs_getopt(mp->mnt_optnew, "soft", NULL, NULL) == 0)
|
|
args.flags |= NFSMNT_SOFT;
|
|
if (vfs_getopt(mp->mnt_optnew, "hard", NULL, NULL) == 0)
|
|
args.flags &= ~NFSMNT_SOFT;
|
|
if (vfs_getopt(mp->mnt_optnew, "mntudp", NULL, NULL) == 0)
|
|
args.sotype = SOCK_DGRAM;
|
|
if (vfs_getopt(mp->mnt_optnew, "udp", NULL, NULL) == 0)
|
|
args.sotype = SOCK_DGRAM;
|
|
if (vfs_getopt(mp->mnt_optnew, "tcp", NULL, NULL) == 0)
|
|
args.sotype = SOCK_STREAM;
|
|
if (vfs_getopt(mp->mnt_optnew, "nfsv3", NULL, NULL) == 0)
|
|
args.flags |= NFSMNT_NFSV3;
|
|
if (vfs_getopt(mp->mnt_optnew, "nocto", NULL, NULL) == 0)
|
|
args.flags |= NFSMNT_NOCTO;
|
|
if (vfs_getopt(mp->mnt_optnew, "readdirsize", (void **)&opt, NULL) == 0) {
|
|
if (opt == NULL) {
|
|
vfs_mount_error(mp, "illegal readdirsize");
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
ret = sscanf(opt, "%d", &args.readdirsize);
|
|
if (ret != 1 || args.readdirsize <= 0) {
|
|
vfs_mount_error(mp, "illegal readdirsize: %s",
|
|
opt);
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
args.flags |= NFSMNT_READDIRSIZE;
|
|
}
|
|
if (vfs_getopt(mp->mnt_optnew, "readahead", (void **)&opt, NULL) == 0) {
|
|
if (opt == NULL) {
|
|
vfs_mount_error(mp, "illegal readahead");
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
ret = sscanf(opt, "%d", &args.readahead);
|
|
if (ret != 1 || args.readahead <= 0) {
|
|
vfs_mount_error(mp, "illegal readahead: %s",
|
|
opt);
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
args.flags |= NFSMNT_READAHEAD;
|
|
}
|
|
if (vfs_getopt(mp->mnt_optnew, "wsize", (void **)&opt, NULL) == 0) {
|
|
if (opt == NULL) {
|
|
vfs_mount_error(mp, "illegal wsize");
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
ret = sscanf(opt, "%d", &args.wsize);
|
|
if (ret != 1 || args.wsize <= 0) {
|
|
vfs_mount_error(mp, "illegal wsize: %s",
|
|
opt);
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
args.flags |= NFSMNT_WSIZE;
|
|
}
|
|
if (vfs_getopt(mp->mnt_optnew, "rsize", (void **)&opt, NULL) == 0) {
|
|
if (opt == NULL) {
|
|
vfs_mount_error(mp, "illegal rsize");
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
ret = sscanf(opt, "%d", &args.rsize);
|
|
if (ret != 1 || args.rsize <= 0) {
|
|
vfs_mount_error(mp, "illegal wsize: %s",
|
|
opt);
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
args.flags |= NFSMNT_RSIZE;
|
|
}
|
|
if (vfs_getopt(mp->mnt_optnew, "retrans", (void **)&opt, NULL) == 0) {
|
|
if (opt == NULL) {
|
|
vfs_mount_error(mp, "illegal retrans");
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
ret = sscanf(opt, "%d", &args.retrans);
|
|
if (ret != 1 || args.retrans <= 0) {
|
|
vfs_mount_error(mp, "illegal retrans: %s",
|
|
opt);
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
args.flags |= NFSMNT_RETRANS;
|
|
}
|
|
if (vfs_getopt(mp->mnt_optnew, "acregmin", (void **)&opt, NULL) == 0) {
|
|
ret = sscanf(opt, "%d", &args.acregmin);
|
|
if (ret != 1 || args.acregmin < 0) {
|
|
vfs_mount_error(mp, "illegal acregmin: %s",
|
|
opt);
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
args.flags |= NFSMNT_ACREGMIN;
|
|
}
|
|
if (vfs_getopt(mp->mnt_optnew, "acregmax", (void **)&opt, NULL) == 0) {
|
|
ret = sscanf(opt, "%d", &args.acregmax);
|
|
if (ret != 1 || args.acregmax < 0) {
|
|
vfs_mount_error(mp, "illegal acregmax: %s",
|
|
opt);
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
args.flags |= NFSMNT_ACREGMAX;
|
|
}
|
|
if (vfs_getopt(mp->mnt_optnew, "acdirmin", (void **)&opt, NULL) == 0) {
|
|
ret = sscanf(opt, "%d", &args.acdirmin);
|
|
if (ret != 1 || args.acdirmin < 0) {
|
|
vfs_mount_error(mp, "illegal acdirmin: %s",
|
|
opt);
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
args.flags |= NFSMNT_ACDIRMIN;
|
|
}
|
|
if (vfs_getopt(mp->mnt_optnew, "acdirmax", (void **)&opt, NULL) == 0) {
|
|
ret = sscanf(opt, "%d", &args.acdirmax);
|
|
if (ret != 1 || args.acdirmax < 0) {
|
|
vfs_mount_error(mp, "illegal acdirmax: %s",
|
|
opt);
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
args.flags |= NFSMNT_ACDIRMAX;
|
|
}
|
|
if (vfs_getopt(mp->mnt_optnew, "wcommitsize", (void **)&opt, NULL) == 0) {
|
|
ret = sscanf(opt, "%d", &args.wcommitsize);
|
|
if (ret != 1 || args.wcommitsize < 0) {
|
|
vfs_mount_error(mp, "illegal wcommitsize: %s", opt);
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
args.flags |= NFSMNT_WCOMMITSIZE;
|
|
}
|
|
if (vfs_getopt(mp->mnt_optnew, "deadthresh", (void **)&opt, NULL) == 0) {
|
|
ret = sscanf(opt, "%d", &args.deadthresh);
|
|
if (ret != 1 || args.deadthresh <= 0) {
|
|
vfs_mount_error(mp, "illegal deadthresh: %s",
|
|
opt);
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
args.flags |= NFSMNT_DEADTHRESH;
|
|
}
|
|
if (vfs_getopt(mp->mnt_optnew, "timeout", (void **)&opt, NULL) == 0) {
|
|
ret = sscanf(opt, "%d", &args.timeo);
|
|
if (ret != 1 || args.timeo <= 0) {
|
|
vfs_mount_error(mp, "illegal timeout: %s",
|
|
opt);
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
args.flags |= NFSMNT_TIMEO;
|
|
}
|
|
if (vfs_getopt(mp->mnt_optnew, "maxgroups", (void **)&opt, NULL) == 0) {
|
|
ret = sscanf(opt, "%d", &args.maxgrouplist);
|
|
if (ret != 1 || args.maxgrouplist <= 0) {
|
|
vfs_mount_error(mp, "illegal maxgroups: %s",
|
|
opt);
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
args.flags |= NFSMNT_MAXGRPS;
|
|
}
|
|
if (vfs_getopt(mp->mnt_optnew, "nametimeo", (void **)&opt, NULL) == 0) {
|
|
ret = sscanf(opt, "%d", &nametimeo);
|
|
if (ret != 1 || nametimeo < 0) {
|
|
vfs_mount_error(mp, "illegal nametimeo: %s", opt);
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
}
|
|
if (vfs_getopt(mp->mnt_optnew, "negnametimeo", (void **)&opt, NULL)
|
|
== 0) {
|
|
ret = sscanf(opt, "%d", &negnametimeo);
|
|
if (ret != 1 || negnametimeo < 0) {
|
|
vfs_mount_error(mp, "illegal negnametimeo: %s",
|
|
opt);
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
}
|
|
if (vfs_getopt(mp->mnt_optnew, "addr", (void **)&args.addr,
|
|
&args.addrlen) == 0) {
|
|
has_addr_opt = 1;
|
|
if (args.addrlen > SOCK_MAXADDRLEN) {
|
|
error = ENAMETOOLONG;
|
|
goto out;
|
|
}
|
|
nam = malloc(args.addrlen, M_SONAME,
|
|
M_WAITOK);
|
|
bcopy(args.addr, nam, args.addrlen);
|
|
nam->sa_len = args.addrlen;
|
|
}
|
|
if (vfs_getopt(mp->mnt_optnew, "fh", (void **)&args.fh,
|
|
&args.fhsize) == 0) {
|
|
has_fh_opt = 1;
|
|
}
|
|
if (vfs_getopt(mp->mnt_optnew, "hostname", (void **)&args.hostname,
|
|
NULL) == 0) {
|
|
has_hostname_opt = 1;
|
|
}
|
|
if (args.hostname == NULL) {
|
|
vfs_mount_error(mp, "Invalid hostname");
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
if (args.fhsize < 0 || args.fhsize > NFSX_V3FHMAX) {
|
|
vfs_mount_error(mp, "Bad file handle");
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if (mp->mnt_flag & MNT_UPDATE) {
|
|
struct nfsmount *nmp = VFSTONFS(mp);
|
|
|
|
if (nmp == NULL) {
|
|
error = EIO;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* If a change from TCP->UDP is done and there are thread(s)
|
|
* that have I/O RPC(s) in progress with a tranfer size
|
|
* greater than NFS_MAXDGRAMDATA, those thread(s) will be
|
|
* hung, retrying the RPC(s) forever. Usually these threads
|
|
* will be seen doing an uninterruptible sleep on wait channel
|
|
* "newnfsreq" (truncated to "newnfsre" by procstat).
|
|
*/
|
|
if (args.sotype == SOCK_DGRAM && nmp->nm_sotype == SOCK_STREAM)
|
|
tprintf(curthread->td_proc, LOG_WARNING,
|
|
"Warning: mount -u that changes TCP->UDP can result in hung threads\n");
|
|
|
|
/*
|
|
* When doing an update, we can't change from or to
|
|
* v3, switch lockd strategies or change cookie translation
|
|
*/
|
|
args.flags = (args.flags &
|
|
~(NFSMNT_NFSV3 | NFSMNT_NOLOCKD /*|NFSMNT_XLATECOOKIE*/)) |
|
|
(nmp->nm_flag &
|
|
(NFSMNT_NFSV3 | NFSMNT_NOLOCKD /*|NFSMNT_XLATECOOKIE*/));
|
|
nfs_decode_args(mp, nmp, &args, NULL);
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Make the nfs_ip_paranoia sysctl serve as the default connection
|
|
* or no-connection mode for those protocols that support
|
|
* no-connection mode (the flag will be cleared later for protocols
|
|
* that do not support no-connection mode). This will allow a client
|
|
* to receive replies from a different IP then the request was
|
|
* sent to. Note: default value for nfs_ip_paranoia is 1 (paranoid),
|
|
* not 0.
|
|
*/
|
|
if (nfs_ip_paranoia == 0)
|
|
args.flags |= NFSMNT_NOCONN;
|
|
|
|
if (has_nfs_args_opt) {
|
|
/*
|
|
* In the 'nfs_args' case, the pointers in the args
|
|
* structure are in userland - we copy them in here.
|
|
*/
|
|
if (!has_fh_opt) {
|
|
error = copyin((caddr_t)args.fh, (caddr_t)nfh,
|
|
args.fhsize);
|
|
if (error) {
|
|
goto out;
|
|
}
|
|
args.fh = nfh;
|
|
}
|
|
if (!has_hostname_opt) {
|
|
error = copyinstr(args.hostname, hst, MNAMELEN-1, &len);
|
|
if (error) {
|
|
goto out;
|
|
}
|
|
bzero(&hst[len], MNAMELEN - len);
|
|
args.hostname = hst;
|
|
}
|
|
if (!has_addr_opt) {
|
|
/* sockargs() call must be after above copyin() calls */
|
|
error = getsockaddr(&nam, (caddr_t)args.addr,
|
|
args.addrlen);
|
|
if (error) {
|
|
goto out;
|
|
}
|
|
}
|
|
} else if (has_addr_opt == 0) {
|
|
vfs_mount_error(mp, "No server address");
|
|
error = EINVAL;
|
|
goto out;
|
|
}
|
|
error = mountnfs(&args, mp, nam, args.hostname, &vp,
|
|
curthread->td_ucred, nametimeo, negnametimeo);
|
|
out:
|
|
if (!error) {
|
|
MNT_ILOCK(mp);
|
|
mp->mnt_kern_flag |= (MNTK_MPSAFE|MNTK_LOOKUP_SHARED);
|
|
MNT_IUNLOCK(mp);
|
|
}
|
|
return (error);
|
|
}
|
|
|
|
|
|
/*
|
|
* VFS Operations.
|
|
*
|
|
* mount system call
|
|
* It seems a bit dumb to copyinstr() the host and path here and then
|
|
* bcopy() them in mountnfs(), but I wanted to detect errors before
|
|
* doing the sockargs() call because sockargs() allocates an mbuf and
|
|
* an error after that means that I have to release the mbuf.
|
|
*/
|
|
/* ARGSUSED */
|
|
static int
|
|
nfs_cmount(struct mntarg *ma, void *data, uint64_t flags)
|
|
{
|
|
int error;
|
|
struct nfs_args args;
|
|
|
|
error = copyin(data, &args, sizeof (struct nfs_args));
|
|
if (error)
|
|
return error;
|
|
|
|
ma = mount_arg(ma, "nfs_args", &args, sizeof args);
|
|
|
|
error = kernel_mount(ma, flags);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Common code for mount and mountroot
|
|
*/
|
|
static int
|
|
mountnfs(struct nfs_args *argp, struct mount *mp, struct sockaddr *nam,
|
|
char *hst, struct vnode **vpp, struct ucred *cred, int nametimeo,
|
|
int negnametimeo)
|
|
{
|
|
struct nfsmount *nmp;
|
|
struct nfsnode *np;
|
|
int error;
|
|
struct vattr attrs;
|
|
|
|
if (mp->mnt_flag & MNT_UPDATE) {
|
|
nmp = VFSTONFS(mp);
|
|
printf("%s: MNT_UPDATE is no longer handled here\n", __func__);
|
|
free(nam, M_SONAME);
|
|
return (0);
|
|
} else {
|
|
nmp = uma_zalloc(nfsmount_zone, M_WAITOK);
|
|
bzero((caddr_t)nmp, sizeof (struct nfsmount));
|
|
TAILQ_INIT(&nmp->nm_bufq);
|
|
mp->mnt_data = nmp;
|
|
nmp->nm_getinfo = nfs_getnlminfo;
|
|
nmp->nm_vinvalbuf = nfs_vinvalbuf;
|
|
}
|
|
vfs_getnewfsid(mp);
|
|
nmp->nm_mountp = mp;
|
|
mtx_init(&nmp->nm_mtx, "NFSmount lock", NULL, MTX_DEF);
|
|
|
|
/*
|
|
* V2 can only handle 32 bit filesizes. A 4GB-1 limit may be too
|
|
* high, depending on whether we end up with negative offsets in
|
|
* the client or server somewhere. 2GB-1 may be safer.
|
|
*
|
|
* For V3, nfs_fsinfo will adjust this as necessary. Assume maximum
|
|
* that we can handle until we find out otherwise.
|
|
*/
|
|
if ((argp->flags & NFSMNT_NFSV3) == 0)
|
|
nmp->nm_maxfilesize = 0xffffffffLL;
|
|
else
|
|
nmp->nm_maxfilesize = OFF_MAX;
|
|
|
|
nmp->nm_timeo = NFS_TIMEO;
|
|
nmp->nm_retry = NFS_RETRANS;
|
|
if ((argp->flags & NFSMNT_NFSV3) && argp->sotype == SOCK_STREAM) {
|
|
nmp->nm_wsize = nmp->nm_rsize = NFS_MAXDATA;
|
|
} else {
|
|
nmp->nm_wsize = NFS_WSIZE;
|
|
nmp->nm_rsize = NFS_RSIZE;
|
|
}
|
|
nmp->nm_wcommitsize = hibufspace / (desiredvnodes / 1000);
|
|
nmp->nm_readdirsize = NFS_READDIRSIZE;
|
|
nmp->nm_numgrps = NFS_MAXGRPS;
|
|
nmp->nm_readahead = NFS_DEFRAHEAD;
|
|
nmp->nm_deadthresh = NFS_MAXDEADTHRESH;
|
|
nmp->nm_nametimeo = nametimeo;
|
|
nmp->nm_negnametimeo = negnametimeo;
|
|
nmp->nm_tprintf_delay = nfs_tprintf_delay;
|
|
if (nmp->nm_tprintf_delay < 0)
|
|
nmp->nm_tprintf_delay = 0;
|
|
nmp->nm_tprintf_initial_delay = nfs_tprintf_initial_delay;
|
|
if (nmp->nm_tprintf_initial_delay < 0)
|
|
nmp->nm_tprintf_initial_delay = 0;
|
|
nmp->nm_fhsize = argp->fhsize;
|
|
bcopy((caddr_t)argp->fh, (caddr_t)nmp->nm_fh, argp->fhsize);
|
|
bcopy(hst, mp->mnt_stat.f_mntfromname, MNAMELEN);
|
|
nmp->nm_nam = nam;
|
|
/* Set up the sockets and per-host congestion */
|
|
nmp->nm_sotype = argp->sotype;
|
|
nmp->nm_soproto = argp->proto;
|
|
nmp->nm_rpcops = &nfs_rpcops;
|
|
|
|
nfs_decode_args(mp, nmp, argp, hst);
|
|
|
|
/*
|
|
* For Connection based sockets (TCP,...) defer the connect until
|
|
* the first request, in case the server is not responding.
|
|
*/
|
|
if (nmp->nm_sotype == SOCK_DGRAM &&
|
|
(error = nfs_connect(nmp)))
|
|
goto bad;
|
|
|
|
/*
|
|
* This is silly, but it has to be set so that vinifod() works.
|
|
* We do not want to do an nfs_statfs() here since we can get
|
|
* stuck on a dead server and we are holding a lock on the mount
|
|
* point.
|
|
*/
|
|
mtx_lock(&nmp->nm_mtx);
|
|
mp->mnt_stat.f_iosize = nfs_iosize(nmp);
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
/*
|
|
* A reference count is needed on the nfsnode representing the
|
|
* remote root. If this object is not persistent, then backward
|
|
* traversals of the mount point (i.e. "..") will not work if
|
|
* the nfsnode gets flushed out of the cache. Ufs does not have
|
|
* this problem, because one can identify root inodes by their
|
|
* number == ROOTINO (2).
|
|
*/
|
|
error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np, LK_EXCLUSIVE);
|
|
if (error)
|
|
goto bad;
|
|
*vpp = NFSTOV(np);
|
|
|
|
/*
|
|
* Get file attributes and transfer parameters for the
|
|
* mountpoint. This has the side effect of filling in
|
|
* (*vpp)->v_type with the correct value.
|
|
*/
|
|
if (argp->flags & NFSMNT_NFSV3)
|
|
nfs_fsinfo(nmp, *vpp, curthread->td_ucred, curthread);
|
|
else
|
|
VOP_GETATTR(*vpp, &attrs, curthread->td_ucred);
|
|
|
|
/*
|
|
* Lose the lock but keep the ref.
|
|
*/
|
|
VOP_UNLOCK(*vpp, 0);
|
|
|
|
return (0);
|
|
bad:
|
|
nfs_disconnect(nmp);
|
|
mtx_destroy(&nmp->nm_mtx);
|
|
uma_zfree(nfsmount_zone, nmp);
|
|
free(nam, M_SONAME);
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* unmount system call
|
|
*/
|
|
static int
|
|
nfs_unmount(struct mount *mp, int mntflags)
|
|
{
|
|
struct nfsmount *nmp;
|
|
int error, flags = 0;
|
|
|
|
if (mntflags & MNT_FORCE)
|
|
flags |= FORCECLOSE;
|
|
nmp = VFSTONFS(mp);
|
|
/*
|
|
* Goes something like this..
|
|
* - Call vflush() to clear out vnodes for this filesystem
|
|
* - Close the socket
|
|
* - Free up the data structures
|
|
*/
|
|
/* In the forced case, cancel any outstanding requests. */
|
|
if (flags & FORCECLOSE) {
|
|
error = nfs_nmcancelreqs(nmp);
|
|
if (error)
|
|
goto out;
|
|
}
|
|
/* We hold 1 extra ref on the root vnode; see comment in mountnfs(). */
|
|
error = vflush(mp, 1, flags, curthread);
|
|
if (error)
|
|
goto out;
|
|
|
|
/*
|
|
* We are now committed to the unmount.
|
|
*/
|
|
nfs_disconnect(nmp);
|
|
free(nmp->nm_nam, M_SONAME);
|
|
|
|
mtx_destroy(&nmp->nm_mtx);
|
|
uma_zfree(nfsmount_zone, nmp);
|
|
out:
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Return root of a filesystem
|
|
*/
|
|
static int
|
|
nfs_root(struct mount *mp, int flags, struct vnode **vpp)
|
|
{
|
|
struct vnode *vp;
|
|
struct nfsmount *nmp;
|
|
struct nfsnode *np;
|
|
int error;
|
|
|
|
nmp = VFSTONFS(mp);
|
|
error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np, flags);
|
|
if (error)
|
|
return error;
|
|
vp = NFSTOV(np);
|
|
/*
|
|
* Get transfer parameters and attributes for root vnode once.
|
|
*/
|
|
mtx_lock(&nmp->nm_mtx);
|
|
if ((nmp->nm_state & NFSSTA_GOTFSINFO) == 0 &&
|
|
(nmp->nm_flag & NFSMNT_NFSV3)) {
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
nfs_fsinfo(nmp, vp, curthread->td_ucred, curthread);
|
|
} else
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
if (vp->v_type == VNON)
|
|
vp->v_type = VDIR;
|
|
vp->v_vflag |= VV_ROOT;
|
|
*vpp = vp;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Flush out the buffer cache
|
|
*/
|
|
/* ARGSUSED */
|
|
static int
|
|
nfs_sync(struct mount *mp, int waitfor)
|
|
{
|
|
struct vnode *vp, *mvp;
|
|
struct thread *td;
|
|
int error, allerror = 0;
|
|
|
|
td = curthread;
|
|
|
|
MNT_ILOCK(mp);
|
|
/*
|
|
* If a forced dismount is in progress, return from here so that
|
|
* the umount(2) syscall doesn't get stuck in VFS_SYNC() before
|
|
* calling VFS_UNMOUNT().
|
|
*/
|
|
if ((mp->mnt_kern_flag & MNTK_UNMOUNTF) != 0) {
|
|
MNT_IUNLOCK(mp);
|
|
return (EBADF);
|
|
}
|
|
|
|
/*
|
|
* Force stale buffer cache information to be flushed.
|
|
*/
|
|
loop:
|
|
MNT_VNODE_FOREACH(vp, mp, mvp) {
|
|
VI_LOCK(vp);
|
|
MNT_IUNLOCK(mp);
|
|
/* XXX Racy bv_cnt check. */
|
|
if (VOP_ISLOCKED(vp) || vp->v_bufobj.bo_dirty.bv_cnt == 0 ||
|
|
waitfor == MNT_LAZY) {
|
|
VI_UNLOCK(vp);
|
|
MNT_ILOCK(mp);
|
|
continue;
|
|
}
|
|
if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) {
|
|
MNT_ILOCK(mp);
|
|
MNT_VNODE_FOREACH_ABORT_ILOCKED(mp, mvp);
|
|
goto loop;
|
|
}
|
|
error = VOP_FSYNC(vp, waitfor, td);
|
|
if (error)
|
|
allerror = error;
|
|
VOP_UNLOCK(vp, 0);
|
|
vrele(vp);
|
|
|
|
MNT_ILOCK(mp);
|
|
}
|
|
MNT_IUNLOCK(mp);
|
|
return (allerror);
|
|
}
|
|
|
|
static int
|
|
nfs_sysctl(struct mount *mp, fsctlop_t op, struct sysctl_req *req)
|
|
{
|
|
struct nfsmount *nmp = VFSTONFS(mp);
|
|
struct vfsquery vq;
|
|
int error;
|
|
|
|
bzero(&vq, sizeof(vq));
|
|
switch (op) {
|
|
#if 0
|
|
case VFS_CTL_NOLOCKS:
|
|
val = (nmp->nm_flag & NFSMNT_NOLOCKS) ? 1 : 0;
|
|
if (req->oldptr != NULL) {
|
|
error = SYSCTL_OUT(req, &val, sizeof(val));
|
|
if (error)
|
|
return (error);
|
|
}
|
|
if (req->newptr != NULL) {
|
|
error = SYSCTL_IN(req, &val, sizeof(val));
|
|
if (error)
|
|
return (error);
|
|
if (val)
|
|
nmp->nm_flag |= NFSMNT_NOLOCKS;
|
|
else
|
|
nmp->nm_flag &= ~NFSMNT_NOLOCKS;
|
|
}
|
|
break;
|
|
#endif
|
|
case VFS_CTL_QUERY:
|
|
mtx_lock(&nmp->nm_mtx);
|
|
if (nmp->nm_state & NFSSTA_TIMEO)
|
|
vq.vq_flags |= VQ_NOTRESP;
|
|
mtx_unlock(&nmp->nm_mtx);
|
|
#if 0
|
|
if (!(nmp->nm_flag & NFSMNT_NOLOCKS) &&
|
|
(nmp->nm_state & NFSSTA_LOCKTIMEO))
|
|
vq.vq_flags |= VQ_NOTRESPLOCK;
|
|
#endif
|
|
error = SYSCTL_OUT(req, &vq, sizeof(vq));
|
|
break;
|
|
case VFS_CTL_TIMEO:
|
|
if (req->oldptr != NULL) {
|
|
error = SYSCTL_OUT(req, &nmp->nm_tprintf_initial_delay,
|
|
sizeof(nmp->nm_tprintf_initial_delay));
|
|
if (error)
|
|
return (error);
|
|
}
|
|
if (req->newptr != NULL) {
|
|
error = vfs_suser(mp, req->td);
|
|
if (error)
|
|
return (error);
|
|
error = SYSCTL_IN(req, &nmp->nm_tprintf_initial_delay,
|
|
sizeof(nmp->nm_tprintf_initial_delay));
|
|
if (error)
|
|
return (error);
|
|
if (nmp->nm_tprintf_initial_delay < 0)
|
|
nmp->nm_tprintf_initial_delay = 0;
|
|
}
|
|
break;
|
|
default:
|
|
return (ENOTSUP);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Extract the information needed by the nlm from the nfs vnode.
|
|
*/
|
|
static void
|
|
nfs_getnlminfo(struct vnode *vp, uint8_t *fhp, size_t *fhlenp,
|
|
struct sockaddr_storage *sp, int *is_v3p, off_t *sizep,
|
|
struct timeval *timeop)
|
|
{
|
|
struct nfsmount *nmp;
|
|
struct nfsnode *np = VTONFS(vp);
|
|
|
|
nmp = VFSTONFS(vp->v_mount);
|
|
if (fhlenp != NULL)
|
|
*fhlenp = (size_t)np->n_fhsize;
|
|
if (fhp != NULL)
|
|
bcopy(np->n_fhp, fhp, np->n_fhsize);
|
|
if (sp != NULL)
|
|
bcopy(nmp->nm_nam, sp, min(nmp->nm_nam->sa_len, sizeof(*sp)));
|
|
if (is_v3p != NULL)
|
|
*is_v3p = NFS_ISV3(vp);
|
|
if (sizep != NULL)
|
|
*sizep = np->n_size;
|
|
if (timeop != NULL) {
|
|
timeop->tv_sec = nmp->nm_timeo / NFS_HZ;
|
|
timeop->tv_usec = (nmp->nm_timeo % NFS_HZ) * (1000000 / NFS_HZ);
|
|
}
|
|
}
|
|
|