diff options
Diffstat (limited to 'sys/fs/nfsclient/nfs_clvfsops.c')
| -rw-r--r-- | sys/fs/nfsclient/nfs_clvfsops.c | 1257 |
1 files changed, 1257 insertions, 0 deletions
diff --git a/sys/fs/nfsclient/nfs_clvfsops.c b/sys/fs/nfsclient/nfs_clvfsops.c new file mode 100644 index 0000000..1ceba85 --- /dev/null +++ b/sys/fs/nfsclient/nfs_clvfsops.c @@ -0,0 +1,1257 @@ +/*- + * 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. + * 4. 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/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 <fs/nfsclient/nfsdiskless.h> + +extern int nfscl_ticks; +extern struct timeval nfsboottime; +extern struct nfsstats newnfsstats; + +MALLOC_DEFINE(M_NEWNFSREQ, "newnfsclient_req", "New NFS request header"); +MALLOC_DEFINE(M_NEWNFSMNT, "newnfsmnt", "New NFS mount struct"); + +SYSCTL_DECL(_vfs_newnfs); +SYSCTL_STRUCT(_vfs_newnfs, NFS_NFSSTATS, nfsstats, CTLFLAG_RW, + &newnfsstats, nfsstats, "S,nfsstats"); +static int nfs_ip_paranoia = 1; +SYSCTL_INT(_vfs_newnfs, OID_AUTO, nfs_ip_paranoia, CTLFLAG_RW, + &nfs_ip_paranoia, 0, ""); +static int nfs_tprintf_initial_delay = NFS_TPRINTF_INITIAL_DELAY; +SYSCTL_INT(_vfs_newnfs, 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_newnfs, NFS_TPRINTF_DELAY, + downdelayinterval, CTLFLAG_RW, &nfs_tprintf_delay, 0, ""); + +static void nfs_decode_args(struct mount *mp, struct nfsmount *nmp, + struct nfs_args *argp, struct ucred *, struct thread *); +static int mountnfs(struct nfs_args *, struct mount *, + struct sockaddr *, char *, u_char *, u_char *, u_char *, + struct vnode **, struct ucred *, struct thread *); +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; + +/* + * 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_SET(nfs_vfsops, newnfs, VFCF_NETWORK); + +/* So that loader and kldload(2) can find us, wherever we are.. */ +MODULE_VERSION(newnfs, 1); + +/* + * This structure must be filled in by a primary bootstrap or bootstrap + * server for a diskless/dataless machine. It is initialized below just + * to ensure that it is allocated to initialized data (.data not .bss). + */ +struct nfs_diskless newnfs_diskless = { { { 0 } } }; +struct nfsv3_diskless newnfsv3_diskless = { { { 0 } } }; +int newnfs_diskless_valid = 0; + +SYSCTL_INT(_vfs_newnfs, OID_AUTO, diskless_valid, CTLFLAG_RD, + &newnfs_diskless_valid, 0, ""); + +SYSCTL_STRING(_vfs_newnfs, OID_AUTO, diskless_rootpath, CTLFLAG_RD, + newnfsv3_diskless.root_hostnam, 0, ""); + +SYSCTL_OPAQUE(_vfs_newnfs, OID_AUTO, diskless_rootaddr, CTLFLAG_RD, + &newnfsv3_diskless.root_saddr, sizeof newnfsv3_diskless.root_saddr, + "%Ssockaddr_in", ""); + + +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 > MAXBSIZE) + nmp->nm_rsize = 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 > MAXBSIZE) + nmp->nm_wsize = 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. + */ + iosize = imax(nmp->nm_rsize, nmp->nm_wsize); + iosize = imax(iosize, PAGE_SIZE); + 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(&newnfs_diskless.myif, &newnfsv3_diskless.myif, + sizeof(struct ifaliasreq)); + bcopy(&newnfs_diskless.mygateway, &newnfsv3_diskless.mygateway, + sizeof(struct sockaddr_in)); + nfs_convert_oargs(&newnfsv3_diskless.root_args,&newnfs_diskless.root_args); + if (newnfsv3_diskless.root_args.flags & NFSMNT_NFSV3) { + newnfsv3_diskless.root_fhsize = NFSX_MYFH; + bcopy(newnfs_diskless.root_fh, newnfsv3_diskless.root_fh, NFSX_MYFH); + } else { + newnfsv3_diskless.root_fhsize = NFSX_V2FH; + bcopy(newnfs_diskless.root_fh, newnfsv3_diskless.root_fh, NFSX_V2FH); + } + bcopy(&newnfs_diskless.root_saddr,&newnfsv3_diskless.root_saddr, + sizeof(struct sockaddr_in)); + bcopy(newnfs_diskless.root_hostnam, newnfsv3_diskless.root_hostnam, MNAMELEN); + newnfsv3_diskless.root_time = newnfs_diskless.root_time; + bcopy(newnfs_diskless.my_hostnam, newnfsv3_diskless.my_hostnam, + MAXHOSTNAMELEN); + newnfs_diskless_valid = 3; +} + +/* + * nfs statfs call + */ +static int +nfs_statfs(struct mount *mp, struct statfs *sbp, struct thread *td) +{ + struct vnode *vp; + struct nfsmount *nmp = VFSTONFS(mp); + struct nfsvattr nfsva; + struct nfsfsinfo fs; + struct nfsstatfs sb; + int error = 0, attrflag, gotfsinfo = 0, ret; + struct nfsnode *np; + + error = vfs_busy(mp, MBF_NOWAIT); + if (error) + return (error); + error = ncl_nget(mp, nmp->nm_fh, nmp->nm_fhsize, &np); + 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 (attrflag == 0) { + ret = nfsrpc_getattrnovp(nmp, nmp->nm_fh, nmp->nm_fhsize, 1, + td->td_ucred, td, &nfsva, 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_flags = nmp->nm_flag; + 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 + * newnfs_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 newnfs_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 + * ncl_mountroot() will be called once in the boot before any other NFS + * client activity occurs. + */ +int +ncl_mountroot(struct mount *mp, struct thread *td) +{ + struct nfsv3_diskless *nd = &newnfsv3_diskless; + struct socket *so; + struct vnode *vp; + struct ifreq ir; + int error, i; + u_long l; + char buf[128]; + char *cp; + +#if defined(BOOTP_NFSROOT) && defined(BOOTP) + bootpc_init(); /* use bootp to get newnfs_diskless filled in */ +#elif defined(NFS_ROOT) + nfs_setup_diskless(); +#endif + + nfscl_init(); + + if (newnfs_diskless_valid == 0) + return (-1); + if (newnfs_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("ncl_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("ncl_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("ncl_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); + error = rtrequest(RTM_ADD, (struct sockaddr *)&sin, + (struct sockaddr *)&nd->mygateway, + (struct sockaddr *)&mask, + RTF_UP | RTF_GATEWAY, NULL); + if (error) + panic("ncl_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); + 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. + */ + bcopy(nd->my_hostnam, hostname, MAXHOSTNAMELEN); + hostname[MAXHOSTNAMELEN - 1] = '\0'; + for (i = 0; i < MAXHOSTNAMELEN; i++) + if (hostname[i] == '\0') + break; + 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, NULL, NULL, NULL, vpp, + td->td_ucred, td)) != 0) { + printf("ncl_mountroot: mount %s on /: %d\n", path, error); + return (error); + } + return (0); +} + +static void +nfs_decode_args(struct mount *mp, struct nfsmount *nmp, struct nfs_args *argp, + struct ucred *cred, struct thread *td) +{ + int s; + int adjsock; + + 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_timeo = NFS_MAXTIMEO; + } + + /* Also clear RDIRPLUS if not NFSv3, it crashes some servers */ + if ((argp->flags & NFSMNT_NFSV3) == 0) + nmp->nm_flag &= ~NFSMNT_RDIRPLUS; + + /* 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_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 ((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 ((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, "newnfscon"); + } + } + } else { + nmp->nm_sotype = argp->sotype; + nmp->nm_soproto = argp->proto; + } +} + +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", + "readdirsize", "soft", "hard", "mntudp", "tcp", "wsize", "rsize", + "retrans", "acregmin", "acregmax", "acdirmin", "acdirmax", + 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 thread *td) +{ + struct nfs_args args = { + .version = NFS_ARGSVERSION, + .addr = NULL, + .addrlen = sizeof (struct sockaddr_in), + .sotype = SOCK_STREAM, + .proto = 0, + .fh = NULL, + .fhsize = 0, + .flags = 0, + .wsize = NFS_WSIZE, + .rsize = NFS_RSIZE, + .readdirsize = NFS_READDIRSIZE, + .timeo = 10, + .retrans = NFS_RETRANS, + .readahead = NFS_DEFRAHEAD, + .wcommitsize = 0, /* was: NQ_DEFLEASE */ + .hostname = NULL, + /* args version 4 */ + .acregmin = NFS_MINATTRTIMO, + .acregmax = NFS_MAXATTRTIMO, + .acdirmin = NFS_MINDIRATTRTIMO, + .acdirmax = NFS_MAXDIRATTRTIMO, + .dirlen = 0, + .krbnamelen = 0, + }; + int error; + struct sockaddr *nam; + struct vnode *vp; + char hst[MNAMELEN]; + size_t len; + u_char nfh[NFSX_FHMAX], krbname[100], dirpath[100], srvkrbname[100]; + + if (vfs_filteropt(mp->mnt_optnew, nfs_opts)) { + error = EINVAL; + goto out; + } + + if ((mp->mnt_flag & (MNT_ROOTFS | MNT_UPDATE)) == MNT_ROOTFS) { + error = ncl_mountroot(mp, td); + goto out; + } + + error = vfs_copyopt(mp->mnt_optnew, "nfs_args", &args, sizeof args); + if (error) + goto out; + + if (args.version != NFS_ARGSVERSION) { + error = EPROGMISMATCH; + goto out; + } + + nfscl_init(); + + if (mp->mnt_flag & MNT_UPDATE) { + struct nfsmount *nmp = VFSTONFS(mp); + + if (nmp == NULL) { + error = EIO; + goto out; + } + /* + * When doing an update, we can't change version, + * security, switch lockd strategies or change cookie + * translation + */ + args.flags = (args.flags & + ~(NFSMNT_NFSV3 | + NFSMNT_NFSV4 | + NFSMNT_KERB | + NFSMNT_INTEGRITY | + NFSMNT_PRIVACY | + NFSMNT_NOLOCKD /*|NFSMNT_XLATECOOKIE*/)) | + (nmp->nm_flag & + (NFSMNT_NFSV3 | + NFSMNT_NFSV4 | + NFSMNT_KERB | + NFSMNT_INTEGRITY | + NFSMNT_PRIVACY | + NFSMNT_NOLOCKD /*|NFSMNT_XLATECOOKIE*/)); + nfs_decode_args(mp, nmp, &args, 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 (args.fhsize < 0 || args.fhsize > NFSX_FHMAX) { + error = EINVAL; + goto out; + } + if (args.fhsize > 0) { + error = copyin((caddr_t)args.fh, (caddr_t)nfh, args.fhsize); + if (error) + goto out; + } + error = copyinstr(args.hostname, hst, MNAMELEN-1, &len); + if (error) + goto out; + bzero(&hst[len], MNAMELEN - len); + if (args.krbnamelen > 0) { + if (args.krbnamelen >= 100) { + error = EINVAL; + goto out; + } + error = copyin(args.krbname, krbname, args.krbnamelen); + if (error) + goto out; + krbname[args.krbnamelen] = '\0'; + } else { + krbname[0] = '\0'; + args.krbnamelen = 0; + } + if (args.dirlen > 0) { + if (args.dirlen >= 100) { + error = EINVAL; + goto out; + } + error = copyin(args.dirpath, dirpath, args.dirlen); + if (error) + goto out; + dirpath[args.dirlen] = '\0'; + } else { + dirpath[0] = '\0'; + args.dirlen = 0; + } + if (args.srvkrbnamelen > 0) { + if (args.srvkrbnamelen >= 100) { + error = EINVAL; + goto out; + } + error = copyin(args.srvkrbname, srvkrbname, args.srvkrbnamelen); + if (error) + goto out; + srvkrbname[args.srvkrbnamelen] = '\0'; + } else { + srvkrbname[0] = '\0'; + args.srvkrbnamelen = 0; + } + /* sockargs() call must be after above copyin() calls */ + error = getsockaddr(&nam, (caddr_t)args.addr, args.addrlen); + if (error) + goto out; + args.fh = nfh; + error = mountnfs(&args, mp, nam, hst, krbname, dirpath, srvkrbname, + &vp, td->td_ucred, td); +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, int flags, struct thread *td) +{ + 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, u_char *dirpath, u_char *srvkrbname, + struct vnode **vpp, struct ucred *cred, struct thread *td) +{ + struct nfsmount *nmp; + struct nfsnode *np; + int error, trycnt, ret, clearintr; + struct nfsvattr nfsva; + static u_int64_t clval = 0; + + 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 { + MALLOC(nmp, struct nfsmount *, sizeof (struct nfsmount) + + argp->krbnamelen + argp->dirlen + argp->srvkrbnamelen + 2, + M_NEWNFSMNT, M_WAITOK); + bzero((caddr_t)nmp, sizeof (struct nfsmount) + + argp->krbnamelen + argp->dirlen + argp->srvkrbnamelen + 2); + TAILQ_INIT(&nmp->nm_bufq); + if (clval == 0) + clval = (u_int64_t)nfsboottime.tv_sec; + nmp->nm_clval = clval++; + nmp->nm_krbnamelen = argp->krbnamelen; + nmp->nm_dirpathlen = argp->dirlen; + nmp->nm_srvkrbnamelen = argp->srvkrbnamelen; + if (nmp->nm_dirpathlen > 0) { + /* + * Since we will be doing dirpath as root, + * set nm_uid to the real uid doing the mount, + * since that is normally the user with a valid TGT. + */ + nmp->nm_uid = td->td_ucred->cr_ruid; + } else { + /* + * Just set to -1, so the first Op + * will set it later, to the uid of + * the process doing that (usually + * from a first open in the mount + * point). + */ + 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; + } + vfs_getnewfsid(mp); + nmp->nm_mountp = mp; + mtx_init(&nmp->nm_mtx, "NFSmount lock", NULL, MTX_DEF | MTX_DUPOK); + + /* + * 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. + * XXX Our "safe" limit on the client is what we can store in our + * buffer cache using signed(!) block numbers. + */ + if ((argp->flags & (NFSMNT_NFSV3 | NFSMNT_NFSV4)) == 0) + nmp->nm_maxfilesize = 0xffffffffLL; + else + nmp->nm_maxfilesize = (u_int64_t)0x80000000 * DEV_BSIZE - 1; + + nmp->nm_timeo = NFS_TIMEO; + nmp->nm_retry = NFS_RETRANS; + 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_wcommitsize = hibufspace / (desiredvnodes / 1000); + nmp->nm_numgrps = NFS_MAXGRPS; + nmp->nm_readahead = NFS_DEFRAHEAD; + 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; + + nfs_decode_args(mp, nmp, argp, cred, td); + + /* + * For Connection based sockets (TCP,...) do the connect here, + * but make it interruptible, even for non-interuptible mounts. + */ + if ((nmp->nm_flag & NFSMNT_INT) == 0) { + nmp->nm_flag |= NFSMNT_INT; + clearintr = 1; + } else { + clearintr = 0; + } + if ((error = newnfs_connect(nmp, &nmp->nm_sockreq, cred, td, 0))) + goto bad; + if (clearintr) + nmp->nm_flag &= ~NFSMNT_INT; + + /* + * 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). + */ + if (nmp->nm_fhsize == 0 && (nmp->nm_flag & NFSMNT_NFSV4) && + nmp->nm_dirpathlen > 0) { + /* + * 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); + if (error) + (void) nfs_catnap(PZERO, "nfsgetdirp"); + } while (error && --trycnt > 0); + if (error) { + error = nfscl_maperr(td, error, (uid_t)0, (gid_t)0); + goto bad; + } + } + if (nmp->nm_fhsize > 0) { + error = ncl_nget(mp, nmp->nm_fh, nmp->nm_fhsize, &np); + 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); + 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(vpp, &nfsva, NULL, NULL, 0, 1); + if (argp->flags & NFSMNT_NFSV3) + ncl_fsinfo(nmp, *vpp, cred, td); + + /* + * Lose the lock but keep the ref. + */ + VOP_UNLOCK(*vpp, 0); + return (0); + } + error = EIO; + +bad: + newnfs_disconnect(&nmp->nm_sockreq); + crfree(nmp->nm_sockreq.nr_cred); + mtx_destroy(&nmp->nm_sockreq.nr_mtx); + mtx_destroy(&nmp->nm_mtx); + 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, trycnt = 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 (mntflags & MNT_FORCE) { + 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, "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); + newnfs_disconnect(&nmp->nm_sockreq); + crfree(nmp->nm_sockreq.nr_cred); + FREE(nmp->nm_nam, M_SONAME); + + mtx_destroy(&nmp->nm_sockreq.nr_mtx); + mtx_destroy(&nmp->nm_mtx); + 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 thread *td) +{ + 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); + 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 thread *td) +{ + struct vnode *vp, *mvp; + int error, allerror = 0; + + /* + * Force stale buffer cache information to be flushed. + */ + MNT_ILOCK(mp); +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); +} + |
