diff options
Diffstat (limited to 'freebsd/sys/fs/nfsclient/nfs_clvfsops.c')
| -rw-r--r-- | freebsd/sys/fs/nfsclient/nfs_clvfsops.c | 2051 |
1 files changed, 2051 insertions, 0 deletions
diff --git a/freebsd/sys/fs/nfsclient/nfs_clvfsops.c b/freebsd/sys/fs/nfsclient/nfs_clvfsops.c new file mode 100644 index 00000000..348a64ab --- /dev/null +++ b/freebsd/sys/fs/nfsclient/nfs_clvfsops.c @@ -0,0 +1,2051 @@ +/*- + * SPDX-License-Identifier: BSD-3-Clause + * + * Copyright (c) 1989, 1993, 1995 + * The Regents of the University of California. All rights reserved. + * + * This code is derived from software contributed to Berkeley by + * Rick Macklem at The University of Guelph. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * from nfs_vfsops.c 8.12 (Berkeley) 5/20/95 + */ + +#include <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + + +#include "opt_bootp.h" +#include "opt_nfsroot.h" + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/kernel.h> +#include <sys/bio.h> +#include <sys/buf.h> +#include <sys/clock.h> +#include <sys/jail.h> +#include <sys/limits.h> +#include <sys/lock.h> +#include <sys/malloc.h> +#include <sys/mbuf.h> +#include <sys/module.h> +#include <sys/mount.h> +#include <sys/proc.h> +#include <sys/socket.h> +#include <sys/socketvar.h> +#include <sys/sockio.h> +#include <sys/sysctl.h> +#include <sys/vnode.h> +#include <sys/signalvar.h> + +#include <vm/vm.h> +#include <vm/vm_extern.h> +#include <vm/uma.h> + +#include <net/if.h> +#include <net/route.h> +#include <netinet/in.h> + +#include <fs/nfs/nfsport.h> +#include <fs/nfsclient/nfsnode.h> +#include <fs/nfsclient/nfsmount.h> +#include <fs/nfsclient/nfs.h> +#include <nfs/nfsdiskless.h> + +FEATURE(nfscl, "NFSv4 client"); + +extern int nfscl_ticks; +extern struct timeval nfsboottime; +extern int nfsrv_useacl; +extern int nfscl_debuglevel; +extern enum nfsiod_state ncl_iodwant[NFS_MAXASYNCDAEMON]; +extern struct nfsmount *ncl_iodmount[NFS_MAXASYNCDAEMON]; +extern struct mtx ncl_iod_mutex; +NFSCLSTATEMUTEX; +extern struct mtx nfsrv_dslock_mtx; + +MALLOC_DEFINE(M_NEWNFSREQ, "newnfsclient_req", "NFS request header"); +MALLOC_DEFINE(M_NEWNFSMNT, "newnfsmnt", "NFS mount struct"); + +SYSCTL_DECL(_vfs_nfs); +static int nfs_ip_paranoia = 1; +SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs_ip_paranoia, CTLFLAG_RW, + &nfs_ip_paranoia, 0, ""); +static int nfs_tprintf_initial_delay = NFS_TPRINTF_INITIAL_DELAY; +SYSCTL_INT(_vfs_nfs, NFS_TPRINTF_INITIAL_DELAY, + downdelayinitial, CTLFLAG_RW, &nfs_tprintf_initial_delay, 0, ""); +/* how long between console messages "nfs server foo not responding" */ +static int nfs_tprintf_delay = NFS_TPRINTF_DELAY; +SYSCTL_INT(_vfs_nfs, NFS_TPRINTF_DELAY, + downdelayinterval, CTLFLAG_RW, &nfs_tprintf_delay, 0, ""); +#ifdef NFS_DEBUG +int nfs_debug; +SYSCTL_INT(_vfs_nfs, OID_AUTO, debug, CTLFLAG_RW, &nfs_debug, 0, + "Toggle debug flag"); +#endif + +static int nfs_mountroot(struct mount *); +static void nfs_sec_name(char *, int *); +static void nfs_decode_args(struct mount *mp, struct nfsmount *nmp, + struct nfs_args *argp, const char *, struct ucred *, + struct thread *); +static int mountnfs(struct nfs_args *, struct mount *, + struct sockaddr *, char *, u_char *, int, u_char *, int, + u_char *, int, struct vnode **, struct ucred *, + struct thread *, int, int, int); +static void nfs_getnlminfo(struct vnode *, uint8_t *, size_t *, + struct sockaddr_storage *, int *, off_t *, + struct timeval *); +static vfs_mount_t nfs_mount; +static vfs_cmount_t nfs_cmount; +static vfs_unmount_t nfs_unmount; +static vfs_root_t nfs_root; +static vfs_statfs_t nfs_statfs; +static vfs_sync_t nfs_sync; +static vfs_sysctl_t nfs_sysctl; +static vfs_purge_t nfs_purge; + +/* + * nfs vfs operations. + */ +static struct vfsops nfs_vfsops = { + .vfs_init = ncl_init, + .vfs_mount = nfs_mount, + .vfs_cmount = nfs_cmount, + .vfs_root = nfs_root, + .vfs_statfs = nfs_statfs, + .vfs_sync = nfs_sync, + .vfs_uninit = ncl_uninit, + .vfs_unmount = nfs_unmount, + .vfs_sysctl = nfs_sysctl, + .vfs_purge = nfs_purge, +}; +VFS_SET(nfs_vfsops, nfs, VFCF_NETWORK | VFCF_SBDRY); + +/* So that loader and kldload(2) can find us, wherever we are.. */ +MODULE_VERSION(nfs, 1); +MODULE_DEPEND(nfs, nfscommon, 1, 1, 1); +MODULE_DEPEND(nfs, krpc, 1, 1, 1); +MODULE_DEPEND(nfs, nfssvc, 1, 1, 1); +MODULE_DEPEND(nfs, nfslock, 1, 1, 1); + +/* + * This structure is now defined in sys/nfs/nfs_diskless.c so that it + * can be shared by both NFS clients. It is declared here so that it + * will be defined for kernels built without NFS_ROOT, although it + * isn't used in that case. + */ +#if !defined(NFS_ROOT) +struct nfs_diskless nfs_diskless = { { { 0 } } }; +struct nfsv3_diskless nfsv3_diskless = { { { 0 } } }; +int nfs_diskless_valid = 0; +#endif + +SYSCTL_INT(_vfs_nfs, OID_AUTO, diskless_valid, CTLFLAG_RD, + &nfs_diskless_valid, 0, + "Has the diskless struct been filled correctly"); + +SYSCTL_STRING(_vfs_nfs, OID_AUTO, diskless_rootpath, CTLFLAG_RD, + nfsv3_diskless.root_hostnam, 0, "Path to nfs root"); + +SYSCTL_OPAQUE(_vfs_nfs, OID_AUTO, diskless_rootaddr, CTLFLAG_RD, + &nfsv3_diskless.root_saddr, sizeof(nfsv3_diskless.root_saddr), + "%Ssockaddr_in", "Diskless root nfs address"); + + +void newnfsargs_ntoh(struct nfs_args *); +static int nfs_mountdiskless(char *, + struct sockaddr_in *, struct nfs_args *, + struct thread *, struct vnode **, struct mount *); +static void nfs_convert_diskless(void); +static void nfs_convert_oargs(struct nfs_args *args, + struct onfs_args *oargs); + +int +newnfs_iosize(struct nfsmount *nmp) +{ + int iosize, maxio; + + /* First, set the upper limit for iosize */ + if (nmp->nm_flag & NFSMNT_NFSV4) { + maxio = NFS_MAXBSIZE; + } else if (nmp->nm_flag & NFSMNT_NFSV3) { + if (nmp->nm_sotype == SOCK_DGRAM) + maxio = NFS_MAXDGRAMDATA; + else + maxio = NFS_MAXBSIZE; + } else { + maxio = NFS_V2MAXDATA; + } + if (nmp->nm_rsize > maxio || nmp->nm_rsize == 0) + nmp->nm_rsize = maxio; + if (nmp->nm_rsize > NFS_MAXBSIZE) + nmp->nm_rsize = NFS_MAXBSIZE; + if (nmp->nm_readdirsize > maxio || nmp->nm_readdirsize == 0) + nmp->nm_readdirsize = maxio; + if (nmp->nm_readdirsize > nmp->nm_rsize) + nmp->nm_readdirsize = nmp->nm_rsize; + if (nmp->nm_wsize > maxio || nmp->nm_wsize == 0) + nmp->nm_wsize = maxio; + if (nmp->nm_wsize > NFS_MAXBSIZE) + nmp->nm_wsize = NFS_MAXBSIZE; + + /* + * Calculate the size used for io buffers. Use the larger + * of the two sizes to minimise nfs requests but make sure + * that it is at least one VM page to avoid wasting buffer + * space. It must also be at least NFS_DIRBLKSIZ, since + * that is the buffer size used for directories. + */ + iosize = imax(nmp->nm_rsize, nmp->nm_wsize); + iosize = imax(iosize, PAGE_SIZE); + iosize = imax(iosize, NFS_DIRBLKSIZ); + nmp->nm_mountp->mnt_stat.f_iosize = iosize; + return (iosize); +} + +static void +nfs_convert_oargs(struct nfs_args *args, struct onfs_args *oargs) +{ + + args->version = NFS_ARGSVERSION; + args->addr = oargs->addr; + args->addrlen = oargs->addrlen; + args->sotype = oargs->sotype; + args->proto = oargs->proto; + args->fh = oargs->fh; + args->fhsize = oargs->fhsize; + args->flags = oargs->flags; + args->wsize = oargs->wsize; + args->rsize = oargs->rsize; + args->readdirsize = oargs->readdirsize; + args->timeo = oargs->timeo; + args->retrans = oargs->retrans; + args->readahead = oargs->readahead; + args->hostname = oargs->hostname; +} + +static void +nfs_convert_diskless(void) +{ + + bcopy(&nfs_diskless.myif, &nfsv3_diskless.myif, + sizeof(struct ifaliasreq)); + bcopy(&nfs_diskless.mygateway, &nfsv3_diskless.mygateway, + sizeof(struct sockaddr_in)); + nfs_convert_oargs(&nfsv3_diskless.root_args,&nfs_diskless.root_args); + if (nfsv3_diskless.root_args.flags & NFSMNT_NFSV3) { + nfsv3_diskless.root_fhsize = NFSX_MYFH; + bcopy(nfs_diskless.root_fh, nfsv3_diskless.root_fh, NFSX_MYFH); + } else { + nfsv3_diskless.root_fhsize = NFSX_V2FH; + bcopy(nfs_diskless.root_fh, nfsv3_diskless.root_fh, NFSX_V2FH); + } + bcopy(&nfs_diskless.root_saddr,&nfsv3_diskless.root_saddr, + sizeof(struct sockaddr_in)); + bcopy(nfs_diskless.root_hostnam, nfsv3_diskless.root_hostnam, MNAMELEN); + nfsv3_diskless.root_time = nfs_diskless.root_time; + bcopy(nfs_diskless.my_hostnam, nfsv3_diskless.my_hostnam, + MAXHOSTNAMELEN); + nfs_diskless_valid = 3; +} + +/* + * nfs statfs call + */ +static int +nfs_statfs(struct mount *mp, struct statfs *sbp) +{ + struct vnode *vp; + struct thread *td; + struct nfsmount *nmp = VFSTONFS(mp); + struct nfsvattr nfsva; + struct nfsfsinfo fs; + struct nfsstatfs sb; + int error = 0, attrflag, gotfsinfo = 0, ret; + struct nfsnode *np; + + td = curthread; + + error = vfs_busy(mp, MBF_NOWAIT); + if (error) + return (error); + error = ncl_nget(mp, nmp->nm_fh, nmp->nm_fhsize, &np, LK_EXCLUSIVE); + if (error) { + vfs_unbusy(mp); + return (error); + } + vp = NFSTOV(np); + mtx_lock(&nmp->nm_mtx); + if (NFSHASNFSV3(nmp) && !NFSHASGOTFSINFO(nmp)) { + mtx_unlock(&nmp->nm_mtx); + error = nfsrpc_fsinfo(vp, &fs, td->td_ucred, td, &nfsva, + &attrflag, NULL); + if (!error) + gotfsinfo = 1; + } else + mtx_unlock(&nmp->nm_mtx); + if (!error) + error = nfsrpc_statfs(vp, &sb, &fs, td->td_ucred, td, &nfsva, + &attrflag, NULL); + if (error != 0) + NFSCL_DEBUG(2, "statfs=%d\n", error); + if (attrflag == 0) { + ret = nfsrpc_getattrnovp(nmp, nmp->nm_fh, nmp->nm_fhsize, 1, + td->td_ucred, td, &nfsva, NULL, NULL); + if (ret) { + /* + * Just set default values to get things going. + */ + NFSBZERO((caddr_t)&nfsva, sizeof (struct nfsvattr)); + nfsva.na_vattr.va_type = VDIR; + nfsva.na_vattr.va_mode = 0777; + nfsva.na_vattr.va_nlink = 100; + nfsva.na_vattr.va_uid = (uid_t)0; + nfsva.na_vattr.va_gid = (gid_t)0; + nfsva.na_vattr.va_fileid = 2; + nfsva.na_vattr.va_gen = 1; + nfsva.na_vattr.va_blocksize = NFS_FABLKSIZE; + nfsva.na_vattr.va_size = 512 * 1024; + } + } + (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, 1); + if (!error) { + mtx_lock(&nmp->nm_mtx); + if (gotfsinfo || (nmp->nm_flag & NFSMNT_NFSV4)) + nfscl_loadfsinfo(nmp, &fs); + nfscl_loadsbinfo(nmp, &sb, sbp); + sbp->f_iosize = newnfs_iosize(nmp); + mtx_unlock(&nmp->nm_mtx); + if (sbp != &mp->mnt_stat) { + bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); + bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); + } + strncpy(&sbp->f_fstypename[0], mp->mnt_vfc->vfc_name, MFSNAMELEN); + } else if (NFS_ISV4(vp)) { + error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); + } + vput(vp); + vfs_unbusy(mp); + return (error); +} + +/* + * nfs version 3 fsinfo rpc call + */ +int +ncl_fsinfo(struct nfsmount *nmp, struct vnode *vp, struct ucred *cred, + struct thread *td) +{ + struct nfsfsinfo fs; + struct nfsvattr nfsva; + int error, attrflag; + + error = nfsrpc_fsinfo(vp, &fs, cred, td, &nfsva, &attrflag, NULL); + if (!error) { + if (attrflag) + (void) nfscl_loadattrcache(&vp, &nfsva, NULL, NULL, 0, + 1); + mtx_lock(&nmp->nm_mtx); + nfscl_loadfsinfo(nmp, &fs); + mtx_unlock(&nmp->nm_mtx); + } + 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. + */ +static 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(); + + /* + * 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 = kern_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_fib(RTM_ADD, (struct sockaddr *)&sin, + (struct sockaddr *)&nd->mygateway, + (struct sockaddr *)&mask, + RTF_UP | RTF_GATEWAY, NULL, RT_DEFAULT_FIB); + 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 dirlen, error; + char *dirpath; + + /* + * Find the directory path in "path", which also has the server's + * name/ip address in it. + */ + dirpath = strchr(path, ':'); + if (dirpath != NULL) + dirlen = strlen(++dirpath); + else + dirlen = 0; + nam = sodupsockaddr((struct sockaddr *)sin, M_WAITOK); + if ((error = mountnfs(args, mp, nam, path, NULL, 0, dirpath, dirlen, + NULL, 0, vpp, td->td_ucred, td, NFS_DEFAULT_NAMETIMEO, + NFS_DEFAULT_NEGNAMETIMEO, 0)) != 0) { + printf("nfs_mountroot: mount %s on /: %d\n", path, error); + return (error); + } + return (0); +} + +static void +nfs_sec_name(char *sec, int *flagsp) +{ + if (!strcmp(sec, "krb5")) + *flagsp |= NFSMNT_KERB; + else if (!strcmp(sec, "krb5i")) + *flagsp |= (NFSMNT_KERB | NFSMNT_INTEGRITY); + else if (!strcmp(sec, "krb5p")) + *flagsp |= (NFSMNT_KERB | NFSMNT_PRIVACY); +} + +static void +nfs_decode_args(struct mount *mp, struct nfsmount *nmp, struct nfs_args *argp, + const char *hostname, struct ucred *cred, struct thread *td) +{ + int adjsock; + char *p; + + /* + * 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_timeo = NFS_MAXTIMEO; + if ((argp->flags & NFSMNT_NFSV4) != 0) + nmp->nm_retry = INT_MAX; + else + nmp->nm_retry = NFS_RETRANS_TCP; + } + + /* Also clear RDIRPLUS if NFSv2, it crashes some servers */ + if ((argp->flags & (NFSMNT_NFSV3 | NFSMNT_NFSV4)) == 0) { + argp->flags &= ~NFSMNT_RDIRPLUS; + nmp->nm_flag &= ~NFSMNT_RDIRPLUS; + } + + /* Clear ONEOPENOWN for NFSv2, 3 and 4.0. */ + if (nmp->nm_minorvers == 0) { + argp->flags &= ~NFSMNT_ONEOPENOWN; + nmp->nm_flag &= ~NFSMNT_ONEOPENOWN; + } + + /* 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; + + 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_WSIZE) && argp->wsize > 0) { + nmp->nm_wsize = argp->wsize; + /* + * Clip at the power of 2 below the size. There is an + * issue (not isolated) that causes intermittent page + * faults if this is not done. + */ + if (nmp->nm_wsize > NFS_FABLKSIZE) + nmp->nm_wsize = 1 << (fls(nmp->nm_wsize) - 1); + else + nmp->nm_wsize = NFS_FABLKSIZE; + } + + if ((argp->flags & NFSMNT_RSIZE) && argp->rsize > 0) { + nmp->nm_rsize = argp->rsize; + /* + * Clip at the power of 2 below the size. There is an + * issue (not isolated) that causes intermittent page + * faults if this is not done. + */ + if (nmp->nm_rsize > NFS_FABLKSIZE) + nmp->nm_rsize = 1 << (fls(nmp->nm_rsize) - 1); + else + nmp->nm_rsize = NFS_FABLKSIZE; + } + + if ((argp->flags & NFSMNT_READDIRSIZE) && argp->readdirsize > 0) { + nmp->nm_readdirsize = argp->readdirsize; + } + + 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_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; + } + + adjsock |= ((nmp->nm_sotype != argp->sotype) || + (nmp->nm_soproto != argp->proto)); + + if (nmp->nm_client != NULL && adjsock) { + int haslock = 0, error = 0; + + if (nmp->nm_sotype == SOCK_STREAM) { + error = newnfs_sndlock(&nmp->nm_sockreq.nr_lock); + if (!error) + haslock = 1; + } + if (!error) { + newnfs_disconnect(&nmp->nm_sockreq); + if (haslock) + newnfs_sndunlock(&nmp->nm_sockreq.nr_lock); + nmp->nm_sotype = argp->sotype; + nmp->nm_soproto = argp->proto; + if (nmp->nm_sotype == SOCK_DGRAM) + while (newnfs_connect(nmp, &nmp->nm_sockreq, + cred, td, 0)) { + printf("newnfs_args: retrying connect\n"); + (void) nfs_catnap(PSOCK, 0, "nfscon"); + } + } + } else { + nmp->nm_sotype = argp->sotype; + nmp->nm_soproto = argp->proto; + } + + if (hostname != NULL) { + strlcpy(nmp->nm_hostname, hostname, + sizeof(nmp->nm_hostname)); + p = strchr(nmp->nm_hostname, ':'); + if (p != NULL) + *p = '\0'; + } +} + +static const char *nfs_opts[] = { "from", "nfs_args", + "noac", "noatime", "noexec", "suiddir", "nosuid", "nosymfollow", "union", + "noclusterr", "noclusterw", "multilabel", "acls", "force", "update", + "async", "noconn", "nolockd", "conn", "lockd", "intr", "rdirplus", + "readdirsize", "soft", "hard", "mntudp", "tcp", "udp", "wsize", "rsize", + "retrans", "actimeo", "acregmin", "acregmax", "acdirmin", "acdirmax", + "resvport", "readahead", "hostname", "timeo", "timeout", "addr", "fh", + "nfsv3", "sec", "principal", "nfsv4", "gssname", "allgssname", "dirpath", + "minorversion", "nametimeo", "negnametimeo", "nocto", "noncontigwr", + "pnfs", "wcommitsize", "oneopenown", + NULL }; + +/* + * Parse the "from" mountarg, passed by the generic mount(8) program + * or the mountroot code. This is used when rerooting into NFS. + * + * Note that the "hostname" is actually a "hostname:/share/path" string. + */ +static int +nfs_mount_parse_from(struct vfsoptlist *opts, char **hostnamep, + struct sockaddr_in **sinp, char *dirpath, size_t dirpathsize, int *dirlenp) +{ + char *nam, *delimp, *hostp, *spec; + int error, have_bracket = 0, offset, rv, speclen; + struct sockaddr_in *sin; + size_t len; + + error = vfs_getopt(opts, "from", (void **)&spec, &speclen); + if (error != 0) + return (error); + nam = malloc(MNAMELEN + 1, M_TEMP, M_WAITOK); + + /* + * This part comes from sbin/mount_nfs/mount_nfs.c:getnfsargs(). + */ + if (*spec == '[' && (delimp = strchr(spec + 1, ']')) != NULL && + *(delimp + 1) == ':') { + hostp = spec + 1; + spec = delimp + 2; + have_bracket = 1; + } else if ((delimp = strrchr(spec, ':')) != NULL) { + hostp = spec; + spec = delimp + 1; + } else if ((delimp = strrchr(spec, '@')) != NULL) { + printf("%s: path@server syntax is deprecated, " + "use server:path\n", __func__); + hostp = delimp + 1; + } else { + printf("%s: no <host>:<dirpath> nfs-name\n", __func__); + free(nam, M_TEMP); + return (EINVAL); + } + *delimp = '\0'; + + /* + * If there has been a trailing slash at mounttime it seems + * that some mountd implementations fail to remove the mount + * entries from their mountlist while unmounting. + */ + for (speclen = strlen(spec); + speclen > 1 && spec[speclen - 1] == '/'; + speclen--) + spec[speclen - 1] = '\0'; + if (strlen(hostp) + strlen(spec) + 1 > MNAMELEN) { + printf("%s: %s:%s: name too long", __func__, hostp, spec); + free(nam, M_TEMP); + return (EINVAL); + } + /* Make both '@' and ':' notations equal */ + if (*hostp != '\0') { + len = strlen(hostp); + offset = 0; + if (have_bracket) + nam[offset++] = '['; + memmove(nam + offset, hostp, len); + if (have_bracket) + nam[len + offset++] = ']'; + nam[len + offset++] = ':'; + memmove(nam + len + offset, spec, speclen); + nam[len + speclen + offset] = '\0'; + } else + nam[0] = '\0'; + + /* + * XXX: IPv6 + */ + sin = malloc(sizeof(*sin), M_SONAME, M_WAITOK); + rv = inet_pton(AF_INET, hostp, &sin->sin_addr); + if (rv != 1) { + printf("%s: cannot parse '%s', inet_pton() returned %d\n", + __func__, hostp, rv); + free(nam, M_TEMP); + free(sin, M_SONAME); + return (EINVAL); + } + + sin->sin_len = sizeof(*sin); + sin->sin_family = AF_INET; + /* + * XXX: hardcoded port number. + */ + sin->sin_port = htons(2049); + + *hostnamep = strdup(nam, M_NEWNFSMNT); + *sinp = sin; + strlcpy(dirpath, spec, dirpathsize); + *dirlenp = strlen(dirpath); + + free(nam, M_TEMP); + return (0); +} + +/* + * 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 getsockaddr() call because getsockaddr() 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, + .readahead = NFS_DEFRAHEAD, + .wcommitsize = 0, /* was: NQ_DEFLEASE */ + .hostname = NULL, + .acregmin = NFS_MINATTRTIMO, + .acregmax = NFS_MAXATTRTIMO, + .acdirmin = NFS_MINDIRATTRTIMO, + .acdirmax = NFS_MAXDIRATTRTIMO, + }; + int error = 0, ret, len; + struct sockaddr *nam = NULL; + struct vnode *vp; + struct thread *td; + char *hst; + u_char nfh[NFSX_FHMAX], krbname[100], dirpath[100], srvkrbname[100]; + char *cp, *opt, *name, *secname; + int nametimeo = NFS_DEFAULT_NAMETIMEO; + int negnametimeo = NFS_DEFAULT_NEGNAMETIMEO; + int minvers = 0; + int dirlen, has_nfs_args_opt, has_nfs_from_opt, + krbnamelen, srvkrbnamelen; + size_t hstlen; + + has_nfs_args_opt = 0; + has_nfs_from_opt = 0; + hst = malloc(MNAMELEN, M_TEMP, M_WAITOK); + if (vfs_filteropt(mp->mnt_optnew, nfs_opts)) { + error = EINVAL; + goto out; + } + + td = curthread; + if ((mp->mnt_flag & (MNT_ROOTFS | MNT_UPDATE)) == MNT_ROOTFS && + nfs_diskless_valid != 0) { + error = nfs_mountroot(mp); + goto out; + } + + nfscl_init(); + + /* + * 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 != 0) + goto out; + + if (args.version != NFS_ARGSVERSION) { + error = EPROGMISMATCH; + goto out; + } + has_nfs_args_opt = 1; + } + + /* Handle the new style options. */ + if (vfs_getopt(mp->mnt_optnew, "noac", NULL, NULL) == 0) { + args.acdirmin = args.acdirmax = + args.acregmin = args.acregmax = 0; + args.flags |= NFSMNT_ACDIRMIN | NFSMNT_ACDIRMAX | + NFSMNT_ACREGMIN | NFSMNT_ACREGMAX; + } + 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, "nfsv4", NULL, NULL) == 0) { + args.flags |= NFSMNT_NFSV4; + args.sotype = SOCK_STREAM; + } + if (vfs_getopt(mp->mnt_optnew, "allgssname", NULL, NULL) == 0) + args.flags |= NFSMNT_ALLGSSNAME; + if (vfs_getopt(mp->mnt_optnew, "nocto", NULL, NULL) == 0) + args.flags |= NFSMNT_NOCTO; + if (vfs_getopt(mp->mnt_optnew, "noncontigwr", NULL, NULL) == 0) + args.flags |= NFSMNT_NONCONTIGWR; + if (vfs_getopt(mp->mnt_optnew, "pnfs", NULL, NULL) == 0) + args.flags |= NFSMNT_PNFS; + if (vfs_getopt(mp->mnt_optnew, "oneopenown", NULL, NULL) == 0) + args.flags |= NFSMNT_ONEOPENOWN; + 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, "actimeo", (void **)&opt, NULL) == 0) { + ret = sscanf(opt, "%d", &args.acregmin); + if (ret != 1 || args.acregmin < 0) { + vfs_mount_error(mp, "illegal actimeo: %s", + opt); + error = EINVAL; + goto out; + } + args.acdirmin = args.acdirmax = args.acregmax = args.acregmin; + args.flags |= NFSMNT_ACDIRMIN | NFSMNT_ACDIRMAX | + NFSMNT_ACREGMIN | NFSMNT_ACREGMAX; + } + 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, "timeo", (void **)&opt, NULL) == 0) { + ret = sscanf(opt, "%d", &args.timeo); + if (ret != 1 || args.timeo <= 0) { + vfs_mount_error(mp, "illegal timeo: %s", + opt); + error = EINVAL; + goto out; + } + args.flags |= NFSMNT_TIMEO; + } + 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, "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, "minorversion", (void **)&opt, NULL) == + 0) { + ret = sscanf(opt, "%d", &minvers); + if (ret != 1 || minvers < 0 || minvers > 1 || + (args.flags & NFSMNT_NFSV4) == 0) { + vfs_mount_error(mp, "illegal minorversion: %s", opt); + error = EINVAL; + goto out; + } + } + if (vfs_getopt(mp->mnt_optnew, "sec", + (void **) &secname, NULL) == 0) + nfs_sec_name(secname, &args.flags); + + 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 transfer 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 + * "nfsreq". + */ + if (args.sotype == SOCK_DGRAM && nmp->nm_sotype == SOCK_STREAM) + tprintf(td->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 version, + * security, switch lockd strategies, change cookie + * translation or switch oneopenown. + */ + args.flags = (args.flags & + ~(NFSMNT_NFSV3 | + NFSMNT_NFSV4 | + NFSMNT_KERB | + NFSMNT_INTEGRITY | + NFSMNT_PRIVACY | + NFSMNT_ONEOPENOWN | + NFSMNT_NOLOCKD /*|NFSMNT_XLATECOOKIE*/)) | + (nmp->nm_flag & + (NFSMNT_NFSV3 | + NFSMNT_NFSV4 | + NFSMNT_KERB | + NFSMNT_INTEGRITY | + NFSMNT_PRIVACY | + NFSMNT_ONEOPENOWN | + NFSMNT_NOLOCKD /*|NFSMNT_XLATECOOKIE*/)); + nfs_decode_args(mp, nmp, &args, NULL, td->td_ucred, td); + 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 != 0) { + /* + * In the 'nfs_args' case, the pointers in the args + * structure are in userland - we copy them in here. + */ + if (args.fhsize < 0 || args.fhsize > NFSX_V3FHMAX) { + vfs_mount_error(mp, "Bad file handle"); + error = EINVAL; + goto out; + } + error = copyin((caddr_t)args.fh, (caddr_t)nfh, + args.fhsize); + if (error != 0) + goto out; + error = copyinstr(args.hostname, hst, MNAMELEN - 1, &hstlen); + if (error != 0) + goto out; + bzero(&hst[hstlen], MNAMELEN - hstlen); + args.hostname = hst; + /* getsockaddr() call must be after above copyin() calls */ + error = getsockaddr(&nam, (caddr_t)args.addr, + args.addrlen); + if (error != 0) + goto out; + } else if (nfs_mount_parse_from(mp->mnt_optnew, + &args.hostname, (struct sockaddr_in **)&nam, dirpath, + sizeof(dirpath), &dirlen) == 0) { + has_nfs_from_opt = 1; + bcopy(args.hostname, hst, MNAMELEN); + hst[MNAMELEN - 1] = '\0'; + + /* + * This only works with NFSv4 for now. + */ + args.fhsize = 0; + args.flags |= NFSMNT_NFSV4; + args.sotype = SOCK_STREAM; + } else { + if (vfs_getopt(mp->mnt_optnew, "fh", (void **)&args.fh, + &args.fhsize) == 0) { + if (args.fhsize < 0 || args.fhsize > NFSX_FHMAX) { + vfs_mount_error(mp, "Bad file handle"); + error = EINVAL; + goto out; + } + bcopy(args.fh, nfh, args.fhsize); + } else { + args.fhsize = 0; + } + (void) vfs_getopt(mp->mnt_optnew, "hostname", + (void **)&args.hostname, &len); + if (args.hostname == NULL) { + vfs_mount_error(mp, "Invalid hostname"); + error = EINVAL; + goto out; + } + if (len >= MNAMELEN) { + vfs_mount_error(mp, "Hostname too long"); + error = EINVAL; + goto out; + } + bcopy(args.hostname, hst, len); + hst[len] = '\0'; + } + + if (vfs_getopt(mp->mnt_optnew, "principal", (void **)&name, NULL) == 0) + strlcpy(srvkrbname, name, sizeof (srvkrbname)); + else { + snprintf(srvkrbname, sizeof (srvkrbname), "nfs@%s", hst); + cp = strchr(srvkrbname, ':'); + if (cp != NULL) + *cp = '\0'; + } + srvkrbnamelen = strlen(srvkrbname); + + if (vfs_getopt(mp->mnt_optnew, "gssname", (void **)&name, NULL) == 0) + strlcpy(krbname, name, sizeof (krbname)); + else + krbname[0] = '\0'; + krbnamelen = strlen(krbname); + + if (has_nfs_from_opt == 0) { + if (vfs_getopt(mp->mnt_optnew, + "dirpath", (void **)&name, NULL) == 0) + strlcpy(dirpath, name, sizeof (dirpath)); + else + dirpath[0] = '\0'; + dirlen = strlen(dirpath); + } + + if (has_nfs_args_opt == 0 && has_nfs_from_opt == 0) { + if (vfs_getopt(mp->mnt_optnew, "addr", + (void **)&args.addr, &args.addrlen) == 0) { + 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; + } else { + vfs_mount_error(mp, "No server address"); + error = EINVAL; + goto out; + } + } + + args.fh = nfh; + error = mountnfs(&args, mp, nam, hst, krbname, krbnamelen, dirpath, + dirlen, srvkrbname, srvkrbnamelen, &vp, td->td_ucred, td, + nametimeo, negnametimeo, minvers); +out: + if (!error) { + MNT_ILOCK(mp); + mp->mnt_kern_flag |= MNTK_LOOKUP_SHARED | MNTK_NO_IOPF | + MNTK_USES_BCACHE; + if ((VFSTONFS(mp)->nm_flag & NFSMNT_NFSV4) != 0) + mp->mnt_kern_flag |= MNTK_NULL_NOCACHE; + MNT_IUNLOCK(mp); + } + free(hst, M_TEMP); + 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 getsockaddr() call because getsockaddr() 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, u_char *krbname, int krbnamelen, u_char *dirpath, int dirlen, + u_char *srvkrbname, int srvkrbnamelen, struct vnode **vpp, + struct ucred *cred, struct thread *td, int nametimeo, int negnametimeo, + int minvers) +{ + struct nfsmount *nmp; + struct nfsnode *np; + int error, trycnt, ret; + struct nfsvattr nfsva; + struct nfsclclient *clp; + struct nfsclds *dsp, *tdsp; + uint32_t lease; + static u_int64_t clval = 0; + + NFSCL_DEBUG(3, "in mnt\n"); + clp = NULL; + 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 = malloc(sizeof (struct nfsmount) + + krbnamelen + dirlen + srvkrbnamelen + 2, + M_NEWNFSMNT, M_WAITOK | M_ZERO); + TAILQ_INIT(&nmp->nm_bufq); + TAILQ_INIT(&nmp->nm_sess); + if (clval == 0) + clval = (u_int64_t)nfsboottime.tv_sec; + nmp->nm_clval = clval++; + nmp->nm_krbnamelen = krbnamelen; + nmp->nm_dirpathlen = dirlen; + nmp->nm_srvkrbnamelen = srvkrbnamelen; + if (td->td_ucred->cr_uid != (uid_t)0) { + /* + * nm_uid is used to get KerberosV credentials for + * the nfsv4 state handling operations if there is + * no host based principal set. Use the uid of + * this user if not root, since they are doing the + * mount. I don't think setting this for root will + * work, since root normally does not have user + * credentials in a credentials cache. + */ + nmp->nm_uid = td->td_ucred->cr_uid; + } else { + /* + * Just set to -1, so it won't be used. + */ + nmp->nm_uid = (uid_t)-1; + } + + /* Copy and null terminate all the names */ + if (nmp->nm_krbnamelen > 0) { + bcopy(krbname, nmp->nm_krbname, nmp->nm_krbnamelen); + nmp->nm_name[nmp->nm_krbnamelen] = '\0'; + } + if (nmp->nm_dirpathlen > 0) { + bcopy(dirpath, NFSMNT_DIRPATH(nmp), + nmp->nm_dirpathlen); + nmp->nm_name[nmp->nm_krbnamelen + nmp->nm_dirpathlen + + 1] = '\0'; + } + if (nmp->nm_srvkrbnamelen > 0) { + bcopy(srvkrbname, NFSMNT_SRVKRBNAME(nmp), + nmp->nm_srvkrbnamelen); + nmp->nm_name[nmp->nm_krbnamelen + nmp->nm_dirpathlen + + nmp->nm_srvkrbnamelen + 2] = '\0'; + } + nmp->nm_sockreq.nr_cred = crhold(cred); + mtx_init(&nmp->nm_sockreq.nr_mtx, "nfssock", NULL, MTX_DEF); + mp->mnt_data = nmp; + nmp->nm_getinfo = nfs_getnlminfo; + nmp->nm_vinvalbuf = ncl_vinvalbuf; + } + vfs_getnewfsid(mp); + nmp->nm_mountp = mp; + mtx_init(&nmp->nm_mtx, "NFSmount lock", NULL, MTX_DEF | MTX_DUPOK); + + /* + * Since nfs_decode_args() might optionally set them, these + * need to be set to defaults before the call, so that the + * optional settings aren't overwritten. + */ + nmp->nm_nametimeo = nametimeo; + nmp->nm_negnametimeo = negnametimeo; + nmp->nm_timeo = NFS_TIMEO; + nmp->nm_retry = NFS_RETRANS; + nmp->nm_readahead = NFS_DEFRAHEAD; + + /* This is empirical approximation of sqrt(hibufspace) * 256. */ + nmp->nm_wcommitsize = NFS_MAXBSIZE / 256; + while ((long)nmp->nm_wcommitsize * nmp->nm_wcommitsize < hibufspace) + nmp->nm_wcommitsize *= 2; + nmp->nm_wcommitsize *= 256; + + if ((argp->flags & NFSMNT_NFSV4) != 0) + nmp->nm_minorvers = minvers; + else + nmp->nm_minorvers = 0; + + nfs_decode_args(mp, nmp, argp, hst, cred, td); + + /* + * 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, ncl_fsinfo will adjust this as necessary. Assume maximum + * that we can handle until we find out otherwise. + */ + if ((argp->flags & (NFSMNT_NFSV3 | NFSMNT_NFSV4)) == 0) + nmp->nm_maxfilesize = 0xffffffffLL; + else + nmp->nm_maxfilesize = OFF_MAX; + + if ((argp->flags & (NFSMNT_NFSV3 | NFSMNT_NFSV4)) == 0) { + nmp->nm_wsize = NFS_WSIZE; + nmp->nm_rsize = NFS_RSIZE; + nmp->nm_readdirsize = NFS_READDIRSIZE; + } + nmp->nm_numgrps = NFS_MAXGRPS; + 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; + if (nmp->nm_fhsize > 0) + 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_sockreq.nr_prog = NFS_PROG; + if ((argp->flags & NFSMNT_NFSV4)) + nmp->nm_sockreq.nr_vers = NFS_VER4; + else if ((argp->flags & NFSMNT_NFSV3)) + nmp->nm_sockreq.nr_vers = NFS_VER3; + else + nmp->nm_sockreq.nr_vers = NFS_VER2; + + + if ((error = newnfs_connect(nmp, &nmp->nm_sockreq, cred, td, 0))) + goto bad; + /* For NFSv4.1, get the clientid now. */ + if (nmp->nm_minorvers > 0) { + NFSCL_DEBUG(3, "at getcl\n"); + error = nfscl_getcl(mp, cred, td, 0, &clp); + NFSCL_DEBUG(3, "aft getcl=%d\n", error); + if (error != 0) + goto bad; + } + + if (nmp->nm_fhsize == 0 && (nmp->nm_flag & NFSMNT_NFSV4) && + nmp->nm_dirpathlen > 0) { + NFSCL_DEBUG(3, "in dirp\n"); + /* + * If the fhsize on the mount point == 0 for V4, the mount + * path needs to be looked up. + */ + trycnt = 3; + do { + error = nfsrpc_getdirpath(nmp, NFSMNT_DIRPATH(nmp), + cred, td); + NFSCL_DEBUG(3, "aft dirp=%d\n", error); + if (error) + (void) nfs_catnap(PZERO, error, "nfsgetdirp"); + } while (error && --trycnt > 0); + if (error) + goto bad; + } + + /* + * 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 == UFS_ROOTINO (2). + */ + if (nmp->nm_fhsize > 0) { + /* + * Set f_iosize to NFS_DIRBLKSIZ so that bo_bsize gets set + * non-zero for the root vnode. f_iosize will be set correctly + * by nfs_statfs() before any I/O occurs. + */ + mp->mnt_stat.f_iosize = NFS_DIRBLKSIZ; + error = ncl_nget(mp, 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. + */ + ret = nfsrpc_getattrnovp(nmp, nmp->nm_fh, nmp->nm_fhsize, 1, + cred, td, &nfsva, NULL, &lease); + if (ret) { + /* + * Just set default values to get things going. + */ + NFSBZERO((caddr_t)&nfsva, sizeof (struct nfsvattr)); + nfsva.na_vattr.va_type = VDIR; + nfsva.na_vattr.va_mode = 0777; + nfsva.na_vattr.va_nlink = 100; + nfsva.na_vattr.va_uid = (uid_t)0; + nfsva.na_vattr.va_gid = (gid_t)0; + nfsva.na_vattr.va_fileid = 2; + nfsva.na_vattr.va_gen = 1; + nfsva.na_vattr.va_blocksize = NFS_FABLKSIZE; + nfsva.na_vattr.va_size = 512 * 1024; + lease = 60; + } + (void) nfscl_loadattrcache(vpp, &nfsva, NULL, NULL, 0, 1); + if (nmp->nm_minorvers > 0) { + NFSCL_DEBUG(3, "lease=%d\n", (int)lease); + NFSLOCKCLSTATE(); + clp->nfsc_renew = NFSCL_RENEW(lease); + clp->nfsc_expire = NFSD_MONOSEC + clp->nfsc_renew; + clp->nfsc_clientidrev++; + if (clp->nfsc_clientidrev == 0) + clp->nfsc_clientidrev++; + NFSUNLOCKCLSTATE(); + /* + * Mount will succeed, so the renew thread can be + * started now. + */ + nfscl_start_renewthread(clp); + nfscl_clientrelease(clp); + } + if (argp->flags & NFSMNT_NFSV3) + ncl_fsinfo(nmp, *vpp, cred, td); + + /* Mark if the mount point supports NFSv4 ACLs. */ + if ((argp->flags & NFSMNT_NFSV4) != 0 && nfsrv_useacl != 0 && + ret == 0 && + NFSISSET_ATTRBIT(&nfsva.na_suppattr, NFSATTRBIT_ACL)) { + MNT_ILOCK(mp); + mp->mnt_flag |= MNT_NFS4ACLS; + MNT_IUNLOCK(mp); + } + + /* + * Lose the lock but keep the ref. + */ + NFSVOPUNLOCK(*vpp, 0); + return (0); + } + error = EIO; + +bad: + if (clp != NULL) + nfscl_clientrelease(clp); + newnfs_disconnect(&nmp->nm_sockreq); + crfree(nmp->nm_sockreq.nr_cred); + if (nmp->nm_sockreq.nr_auth != NULL) + AUTH_DESTROY(nmp->nm_sockreq.nr_auth); + mtx_destroy(&nmp->nm_sockreq.nr_mtx); + mtx_destroy(&nmp->nm_mtx); + if (nmp->nm_clp != NULL) { + NFSLOCKCLSTATE(); + LIST_REMOVE(nmp->nm_clp, nfsc_list); + NFSUNLOCKCLSTATE(); + free(nmp->nm_clp, M_NFSCLCLIENT); + } + TAILQ_FOREACH_SAFE(dsp, &nmp->nm_sess, nfsclds_list, tdsp) { + if (dsp != TAILQ_FIRST(&nmp->nm_sess) && + dsp->nfsclds_sockp != NULL) + newnfs_disconnect(dsp->nfsclds_sockp); + nfscl_freenfsclds(dsp); + } + free(nmp, M_NEWNFSMNT); + free(nam, M_SONAME); + return (error); +} + +/* + * unmount system call + */ +static int +nfs_unmount(struct mount *mp, int mntflags) +{ + struct thread *td; + struct nfsmount *nmp; + int error, flags = 0, i, trycnt = 0; + struct nfsclds *dsp, *tdsp; + + td = curthread; + + if (mntflags & MNT_FORCE) + flags |= FORCECLOSE; + nmp = VFSTONFS(mp); + error = 0; + /* + * 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 (mntflags & MNT_FORCE) { + NFSDDSLOCK(); + if (nfsv4_findmirror(nmp) != NULL) + error = ENXIO; + NFSDDSUNLOCK(); + if (error) + goto out; + error = newnfs_nmcancelreqs(nmp); + if (error) + goto out; + /* For a forced close, get rid of the renew thread now */ + nfscl_umount(nmp, td); + } + /* We hold 1 extra ref on the root vnode; see comment in mountnfs(). */ + do { + error = vflush(mp, 1, flags, td); + if ((mntflags & MNT_FORCE) && error != 0 && ++trycnt < 30) + (void) nfs_catnap(PSOCK, error, "newndm"); + } while ((mntflags & MNT_FORCE) && error != 0 && trycnt < 30); + if (error) + goto out; + + /* + * We are now committed to the unmount. + */ + if ((mntflags & MNT_FORCE) == 0) + nfscl_umount(nmp, td); + else { + mtx_lock(&nmp->nm_mtx); + nmp->nm_privflag |= NFSMNTP_FORCEDISM; + mtx_unlock(&nmp->nm_mtx); + } + /* Make sure no nfsiods are assigned to this mount. */ + NFSLOCKIOD(); + for (i = 0; i < NFS_MAXASYNCDAEMON; i++) + if (ncl_iodmount[i] == nmp) { + ncl_iodwant[i] = NFSIOD_AVAILABLE; + ncl_iodmount[i] = NULL; + } + NFSUNLOCKIOD(); + + /* + * We can now set mnt_data to NULL and wait for + * nfssvc(NFSSVC_FORCEDISM) to complete. + */ + mtx_lock(&mountlist_mtx); + mtx_lock(&nmp->nm_mtx); + mp->mnt_data = NULL; + mtx_unlock(&mountlist_mtx); + while ((nmp->nm_privflag & NFSMNTP_CANCELRPCS) != 0) + msleep(nmp, &nmp->nm_mtx, PVFS, "nfsfdism", 0); + mtx_unlock(&nmp->nm_mtx); + + newnfs_disconnect(&nmp->nm_sockreq); + crfree(nmp->nm_sockreq.nr_cred); + free(nmp->nm_nam, M_SONAME); + if (nmp->nm_sockreq.nr_auth != NULL) + AUTH_DESTROY(nmp->nm_sockreq.nr_auth); + mtx_destroy(&nmp->nm_sockreq.nr_mtx); + mtx_destroy(&nmp->nm_mtx); + TAILQ_FOREACH_SAFE(dsp, &nmp->nm_sess, nfsclds_list, tdsp) { + if (dsp != TAILQ_FIRST(&nmp->nm_sess) && + dsp->nfsclds_sockp != NULL) + newnfs_disconnect(dsp->nfsclds_sockp); + nfscl_freenfsclds(dsp); + } + free(nmp, M_NEWNFSMNT); +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 = ncl_nget(mp, 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 (NFSHASNFSV3(nmp) && !NFSHASGOTFSINFO(nmp)) { + mtx_unlock(&nmp->nm_mtx); + ncl_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 (NFSCL_FORCEDISM(mp)) { + MNT_IUNLOCK(mp); + return (EBADF); + } + MNT_IUNLOCK(mp); + + /* + * Force stale buffer cache information to be flushed. + */ +loop: + MNT_VNODE_FOREACH_ALL(vp, mp, mvp) { + /* XXX Racy bv_cnt check. */ + if (NFSVOPISLOCKED(vp) || vp->v_bufobj.bo_dirty.bv_cnt == 0 || + waitfor == MNT_LAZY) { + VI_UNLOCK(vp); + continue; + } + if (vget(vp, LK_EXCLUSIVE | LK_INTERLOCK, td)) { + MNT_VNODE_FOREACH_ALL_ABORT(mp, mvp); + goto loop; + } + error = VOP_FSYNC(vp, waitfor, td); + if (error) + allerror = error; + NFSVOPUNLOCK(vp, 0); + vrele(vp); + } + 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); +} + +/* + * Purge any RPCs in progress, so that they will all return errors. + * This allows dounmount() to continue as far as VFS_UNMOUNT() for a + * forced dismount. + */ +static void +nfs_purge(struct mount *mp) +{ + struct nfsmount *nmp = VFSTONFS(mp); + + newnfs_nmcancelreqs(nmp); +} + +/* + * 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_fhp->nfh_len; + if (fhp != NULL) + bcopy(np->n_fhp->nfh_fh, fhp, np->n_fhp->nfh_len); + 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); + } +} + +/* + * This function prints out an option name, based on the conditional + * argument. + */ +static __inline void nfscl_printopt(struct nfsmount *nmp, int testval, + char *opt, char **buf, size_t *blen) +{ + int len; + + if (testval != 0 && *blen > strlen(opt)) { + len = snprintf(*buf, *blen, "%s", opt); + if (len != strlen(opt)) + printf("EEK!!\n"); + *buf += len; + *blen -= len; + } +} + +/* + * This function printf out an options integer value. + */ +static __inline void nfscl_printoptval(struct nfsmount *nmp, int optval, + char *opt, char **buf, size_t *blen) +{ + int len; + + if (*blen > strlen(opt) + 1) { + /* Could result in truncated output string. */ + len = snprintf(*buf, *blen, "%s=%d", opt, optval); + if (len < *blen) { + *buf += len; + *blen -= len; + } + } +} + +/* + * Load the option flags and values into the buffer. + */ +void nfscl_retopts(struct nfsmount *nmp, char *buffer, size_t buflen) +{ + char *buf; + size_t blen; + + buf = buffer; + blen = buflen; + nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_NFSV4) != 0, "nfsv4", &buf, + &blen); + if ((nmp->nm_flag & NFSMNT_NFSV4) != 0) { + nfscl_printoptval(nmp, nmp->nm_minorvers, ",minorversion", &buf, + &blen); + nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_PNFS) != 0, ",pnfs", + &buf, &blen); + nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_ONEOPENOWN) != 0 && + nmp->nm_minorvers > 0, ",oneopenown", &buf, &blen); + } + nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_NFSV3) != 0, "nfsv3", &buf, + &blen); + nfscl_printopt(nmp, (nmp->nm_flag & (NFSMNT_NFSV3 | NFSMNT_NFSV4)) == 0, + "nfsv2", &buf, &blen); + nfscl_printopt(nmp, nmp->nm_sotype == SOCK_STREAM, ",tcp", &buf, &blen); + nfscl_printopt(nmp, nmp->nm_sotype != SOCK_STREAM, ",udp", &buf, &blen); + nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_RESVPORT) != 0, ",resvport", + &buf, &blen); + nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_NOCONN) != 0, ",noconn", + &buf, &blen); + nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_SOFT) == 0, ",hard", &buf, + &blen); + nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_SOFT) != 0, ",soft", &buf, + &blen); + nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_INT) != 0, ",intr", &buf, + &blen); + nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_NOCTO) == 0, ",cto", &buf, + &blen); + nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_NOCTO) != 0, ",nocto", &buf, + &blen); + nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_NONCONTIGWR) != 0, + ",noncontigwr", &buf, &blen); + nfscl_printopt(nmp, (nmp->nm_flag & (NFSMNT_NOLOCKD | NFSMNT_NFSV4)) == + 0, ",lockd", &buf, &blen); + nfscl_printopt(nmp, (nmp->nm_flag & (NFSMNT_NOLOCKD | NFSMNT_NFSV4)) == + NFSMNT_NOLOCKD, ",nolockd", &buf, &blen); + nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_RDIRPLUS) != 0, ",rdirplus", + &buf, &blen); + nfscl_printopt(nmp, (nmp->nm_flag & NFSMNT_KERB) == 0, ",sec=sys", + &buf, &blen); + nfscl_printopt(nmp, (nmp->nm_flag & (NFSMNT_KERB | NFSMNT_INTEGRITY | + NFSMNT_PRIVACY)) == NFSMNT_KERB, ",sec=krb5", &buf, &blen); + nfscl_printopt(nmp, (nmp->nm_flag & (NFSMNT_KERB | NFSMNT_INTEGRITY | + NFSMNT_PRIVACY)) == (NFSMNT_KERB | NFSMNT_INTEGRITY), ",sec=krb5i", + &buf, &blen); + nfscl_printopt(nmp, (nmp->nm_flag & (NFSMNT_KERB | NFSMNT_INTEGRITY | + NFSMNT_PRIVACY)) == (NFSMNT_KERB | NFSMNT_PRIVACY), ",sec=krb5p", + &buf, &blen); + nfscl_printoptval(nmp, nmp->nm_acdirmin, ",acdirmin", &buf, &blen); + nfscl_printoptval(nmp, nmp->nm_acdirmax, ",acdirmax", &buf, &blen); + nfscl_printoptval(nmp, nmp->nm_acregmin, ",acregmin", &buf, &blen); + nfscl_printoptval(nmp, nmp->nm_acregmax, ",acregmax", &buf, &blen); + nfscl_printoptval(nmp, nmp->nm_nametimeo, ",nametimeo", &buf, &blen); + nfscl_printoptval(nmp, nmp->nm_negnametimeo, ",negnametimeo", &buf, + &blen); + nfscl_printoptval(nmp, nmp->nm_rsize, ",rsize", &buf, &blen); + nfscl_printoptval(nmp, nmp->nm_wsize, ",wsize", &buf, &blen); + nfscl_printoptval(nmp, nmp->nm_readdirsize, ",readdirsize", &buf, + &blen); + nfscl_printoptval(nmp, nmp->nm_readahead, ",readahead", &buf, &blen); + nfscl_printoptval(nmp, nmp->nm_wcommitsize, ",wcommitsize", &buf, + &blen); + nfscl_printoptval(nmp, nmp->nm_timeo, ",timeout", &buf, &blen); + nfscl_printoptval(nmp, nmp->nm_retry, ",retrans", &buf, &blen); +} + |