| 1 | /* |
| 2 | * Copyright (c) 1989, 1993, 1995 |
| 3 | * The Regents of the University of California. All rights reserved. |
| 4 | * |
| 5 | * This code is derived from software contributed to Berkeley by |
| 6 | * Rick Macklem at The University of Guelph. |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions |
| 10 | * are met: |
| 11 | * 1. Redistributions of source code must retain the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer. |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer in the |
| 15 | * documentation and/or other materials provided with the distribution. |
| 16 | * 3. All advertising materials mentioning features or use of this software |
| 17 | * must display the following acknowledgement: |
| 18 | * This product includes software developed by the University of |
| 19 | * California, Berkeley and its contributors. |
| 20 | * 4. Neither the name of the University nor the names of its contributors |
| 21 | * may be used to endorse or promote products derived from this software |
| 22 | * without specific prior written permission. |
| 23 | * |
| 24 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 25 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 29 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 30 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 31 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 32 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 33 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 34 | * SUCH DAMAGE. |
| 35 | * |
| 36 | * @(#)nfs_vfsops.c 8.12 (Berkeley) 5/20/95 |
| 37 | * $FreeBSD: src/sys/nfs/nfs_vfsops.c,v 1.91.2.7 2003/01/27 20:04:08 dillon Exp $ |
| 38 | * $DragonFly: src/sys/vfs/nfs/nfs_vfsops.c,v 1.6 2003/07/26 21:48:49 rob Exp $ |
| 39 | */ |
| 40 | |
| 41 | #include "opt_bootp.h" |
| 42 | |
| 43 | #include <sys/param.h> |
| 44 | #include <sys/sockio.h> |
| 45 | #include <sys/proc.h> |
| 46 | #include <sys/vnode.h> |
| 47 | #include <sys/kernel.h> |
| 48 | #include <sys/sysctl.h> |
| 49 | #include <sys/malloc.h> |
| 50 | #include <sys/mount.h> |
| 51 | #include <sys/mbuf.h> |
| 52 | #include <sys/socket.h> |
| 53 | #include <sys/socketvar.h> |
| 54 | #include <sys/systm.h> |
| 55 | |
| 56 | #include <vm/vm.h> |
| 57 | #include <vm/vm_extern.h> |
| 58 | #include <vm/vm_zone.h> |
| 59 | |
| 60 | #include <net/if.h> |
| 61 | #include <net/route.h> |
| 62 | #include <netinet/in.h> |
| 63 | |
| 64 | #include <nfs/rpcv2.h> |
| 65 | #include <nfs/nfsproto.h> |
| 66 | #include <nfs/nfs.h> |
| 67 | #include <nfs/nfsnode.h> |
| 68 | #include <nfs/nfsmount.h> |
| 69 | #include <nfs/xdr_subs.h> |
| 70 | #include <nfs/nfsm_subs.h> |
| 71 | #include <nfs/nfsdiskless.h> |
| 72 | #include <nfs/nqnfs.h> |
| 73 | |
| 74 | extern int nfs_mountroot __P((struct mount *mp)); |
| 75 | |
| 76 | extern int nfs_ticks; |
| 77 | |
| 78 | MALLOC_DEFINE(M_NFSREQ, "NFS req", "NFS request header"); |
| 79 | MALLOC_DEFINE(M_NFSBIGFH, "NFSV3 bigfh", "NFS version 3 file handle"); |
| 80 | MALLOC_DEFINE(M_NFSD, "NFS daemon", "Nfs server daemon structure"); |
| 81 | MALLOC_DEFINE(M_NFSDIROFF, "NFSV3 diroff", "NFS directory offset data"); |
| 82 | MALLOC_DEFINE(M_NFSRVDESC, "NFSV3 srvdesc", "NFS server socket descriptor"); |
| 83 | MALLOC_DEFINE(M_NFSUID, "NFS uid", "Nfs uid mapping structure"); |
| 84 | MALLOC_DEFINE(M_NQLEASE, "NQNFS Lease", "Nqnfs lease"); |
| 85 | MALLOC_DEFINE(M_NFSHASH, "NFS hash", "NFS hash tables"); |
| 86 | |
| 87 | vm_zone_t nfsmount_zone; |
| 88 | |
| 89 | struct nfsstats nfsstats; |
| 90 | SYSCTL_NODE(_vfs, OID_AUTO, nfs, CTLFLAG_RW, 0, "NFS filesystem"); |
| 91 | SYSCTL_STRUCT(_vfs_nfs, NFS_NFSSTATS, nfsstats, CTLFLAG_RD, |
| 92 | &nfsstats, nfsstats, ""); |
| 93 | static int nfs_ip_paranoia = 1; |
| 94 | SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs_ip_paranoia, CTLFLAG_RW, |
| 95 | &nfs_ip_paranoia, 0, ""); |
| 96 | #ifdef NFS_DEBUG |
| 97 | int nfs_debug; |
| 98 | SYSCTL_INT(_vfs_nfs, OID_AUTO, debug, CTLFLAG_RW, &nfs_debug, 0, ""); |
| 99 | #endif |
| 100 | |
| 101 | static int nfs_iosize __P((struct nfsmount *nmp)); |
| 102 | static void nfs_decode_args __P((struct nfsmount *nmp, |
| 103 | struct nfs_args *argp)); |
| 104 | static int mountnfs __P((struct nfs_args *,struct mount *, |
| 105 | struct sockaddr *,char *,char *,struct vnode **)); |
| 106 | static int nfs_mount __P(( struct mount *mp, char *path, caddr_t data, |
| 107 | struct nameidata *ndp, struct thread *td)); |
| 108 | static int nfs_unmount __P(( struct mount *mp, int mntflags, |
| 109 | struct thread *td)); |
| 110 | static int nfs_root __P(( struct mount *mp, struct vnode **vpp)); |
| 111 | static int nfs_statfs __P(( struct mount *mp, struct statfs *sbp, |
| 112 | struct thread *td)); |
| 113 | static int nfs_sync __P(( struct mount *mp, int waitfor, |
| 114 | struct thread *td)); |
| 115 | |
| 116 | /* |
| 117 | * nfs vfs operations. |
| 118 | */ |
| 119 | static struct vfsops nfs_vfsops = { |
| 120 | nfs_mount, |
| 121 | vfs_stdstart, |
| 122 | nfs_unmount, |
| 123 | nfs_root, |
| 124 | vfs_stdquotactl, |
| 125 | nfs_statfs, |
| 126 | nfs_sync, |
| 127 | vfs_stdvget, |
| 128 | vfs_stdfhtovp, /* shouldn't happen */ |
| 129 | vfs_stdcheckexp, |
| 130 | vfs_stdvptofh, /* shouldn't happen */ |
| 131 | nfs_init, |
| 132 | nfs_uninit, |
| 133 | vfs_stdextattrctl, |
| 134 | }; |
| 135 | VFS_SET(nfs_vfsops, nfs, VFCF_NETWORK); |
| 136 | |
| 137 | /* |
| 138 | * This structure must be filled in by a primary bootstrap or bootstrap |
| 139 | * server for a diskless/dataless machine. It is initialized below just |
| 140 | * to ensure that it is allocated to initialized data (.data not .bss). |
| 141 | */ |
| 142 | struct nfs_diskless nfs_diskless = { { { 0 } } }; |
| 143 | struct nfsv3_diskless nfsv3_diskless = { { { 0 } } }; |
| 144 | int nfs_diskless_valid = 0; |
| 145 | |
| 146 | SYSCTL_INT(_vfs_nfs, OID_AUTO, diskless_valid, CTLFLAG_RD, |
| 147 | &nfs_diskless_valid, 0, ""); |
| 148 | |
| 149 | SYSCTL_STRING(_vfs_nfs, OID_AUTO, diskless_rootpath, CTLFLAG_RD, |
| 150 | nfsv3_diskless.root_hostnam, 0, ""); |
| 151 | |
| 152 | SYSCTL_OPAQUE(_vfs_nfs, OID_AUTO, diskless_rootaddr, CTLFLAG_RD, |
| 153 | &nfsv3_diskless.root_saddr, sizeof nfsv3_diskless.root_saddr, |
| 154 | "%Ssockaddr_in", ""); |
| 155 | |
| 156 | SYSCTL_STRING(_vfs_nfs, OID_AUTO, diskless_swappath, CTLFLAG_RD, |
| 157 | nfsv3_diskless.swap_hostnam, 0, ""); |
| 158 | |
| 159 | SYSCTL_OPAQUE(_vfs_nfs, OID_AUTO, diskless_swapaddr, CTLFLAG_RD, |
| 160 | &nfsv3_diskless.swap_saddr, sizeof nfsv3_diskless.swap_saddr, |
| 161 | "%Ssockaddr_in",""); |
| 162 | |
| 163 | |
| 164 | void nfsargs_ntoh __P((struct nfs_args *)); |
| 165 | static int nfs_mountdiskless __P((char *, char *, int, |
| 166 | struct sockaddr_in *, struct nfs_args *, |
| 167 | struct thread *, struct vnode **, |
| 168 | struct mount **)); |
| 169 | static void nfs_convert_diskless __P((void)); |
| 170 | static void nfs_convert_oargs __P((struct nfs_args *args, |
| 171 | struct onfs_args *oargs)); |
| 172 | |
| 173 | static int |
| 174 | nfs_iosize(nmp) |
| 175 | struct nfsmount* nmp; |
| 176 | { |
| 177 | int iosize; |
| 178 | |
| 179 | /* |
| 180 | * Calculate the size used for io buffers. Use the larger |
| 181 | * of the two sizes to minimise nfs requests but make sure |
| 182 | * that it is at least one VM page to avoid wasting buffer |
| 183 | * space. |
| 184 | */ |
| 185 | iosize = max(nmp->nm_rsize, nmp->nm_wsize); |
| 186 | if (iosize < PAGE_SIZE) iosize = PAGE_SIZE; |
| 187 | return iosize; |
| 188 | } |
| 189 | |
| 190 | static void |
| 191 | nfs_convert_oargs(args, oargs) |
| 192 | struct nfs_args *args; |
| 193 | struct onfs_args *oargs; |
| 194 | { |
| 195 | args->version = NFS_ARGSVERSION; |
| 196 | args->addr = oargs->addr; |
| 197 | args->addrlen = oargs->addrlen; |
| 198 | args->sotype = oargs->sotype; |
| 199 | args->proto = oargs->proto; |
| 200 | args->fh = oargs->fh; |
| 201 | args->fhsize = oargs->fhsize; |
| 202 | args->flags = oargs->flags; |
| 203 | args->wsize = oargs->wsize; |
| 204 | args->rsize = oargs->rsize; |
| 205 | args->readdirsize = oargs->readdirsize; |
| 206 | args->timeo = oargs->timeo; |
| 207 | args->retrans = oargs->retrans; |
| 208 | args->maxgrouplist = oargs->maxgrouplist; |
| 209 | args->readahead = oargs->readahead; |
| 210 | args->leaseterm = oargs->leaseterm; |
| 211 | args->deadthresh = oargs->deadthresh; |
| 212 | args->hostname = oargs->hostname; |
| 213 | } |
| 214 | |
| 215 | static void |
| 216 | nfs_convert_diskless() |
| 217 | { |
| 218 | bcopy(&nfs_diskless.myif, &nfsv3_diskless.myif, |
| 219 | sizeof(struct ifaliasreq)); |
| 220 | bcopy(&nfs_diskless.mygateway, &nfsv3_diskless.mygateway, |
| 221 | sizeof(struct sockaddr_in)); |
| 222 | nfs_convert_oargs(&nfsv3_diskless.swap_args,&nfs_diskless.swap_args); |
| 223 | nfsv3_diskless.swap_fhsize = NFSX_V2FH; |
| 224 | bcopy(nfs_diskless.swap_fh,nfsv3_diskless.swap_fh,NFSX_V2FH); |
| 225 | bcopy(&nfs_diskless.swap_saddr,&nfsv3_diskless.swap_saddr, |
| 226 | sizeof(struct sockaddr_in)); |
| 227 | bcopy(nfs_diskless.swap_hostnam,nfsv3_diskless.swap_hostnam, MNAMELEN); |
| 228 | nfsv3_diskless.swap_nblks = nfs_diskless.swap_nblks; |
| 229 | bcopy(&nfs_diskless.swap_ucred, &nfsv3_diskless.swap_ucred, |
| 230 | sizeof(struct ucred)); |
| 231 | nfs_convert_oargs(&nfsv3_diskless.root_args,&nfs_diskless.root_args); |
| 232 | nfsv3_diskless.root_fhsize = NFSX_V2FH; |
| 233 | bcopy(nfs_diskless.root_fh,nfsv3_diskless.root_fh,NFSX_V2FH); |
| 234 | bcopy(&nfs_diskless.root_saddr,&nfsv3_diskless.root_saddr, |
| 235 | sizeof(struct sockaddr_in)); |
| 236 | bcopy(nfs_diskless.root_hostnam,nfsv3_diskless.root_hostnam, MNAMELEN); |
| 237 | nfsv3_diskless.root_time = nfs_diskless.root_time; |
| 238 | bcopy(nfs_diskless.my_hostnam,nfsv3_diskless.my_hostnam, |
| 239 | MAXHOSTNAMELEN); |
| 240 | nfs_diskless_valid = 3; |
| 241 | } |
| 242 | |
| 243 | /* |
| 244 | * nfs statfs call |
| 245 | */ |
| 246 | int |
| 247 | nfs_statfs(struct mount *mp, struct statfs *sbp, struct thread *td) |
| 248 | { |
| 249 | struct vnode *vp; |
| 250 | struct nfs_statfs *sfp; |
| 251 | caddr_t cp; |
| 252 | u_int32_t *tl; |
| 253 | int32_t t1, t2; |
| 254 | caddr_t bpos, dpos, cp2; |
| 255 | struct nfsmount *nmp = VFSTONFS(mp); |
| 256 | int error = 0, v3 = (nmp->nm_flag & NFSMNT_NFSV3), retattr; |
| 257 | struct mbuf *mreq, *mrep, *md, *mb, *mb2; |
| 258 | struct ucred *cred; |
| 259 | struct nfsnode *np; |
| 260 | u_quad_t tquad; |
| 261 | |
| 262 | #ifndef nolint |
| 263 | sfp = (struct nfs_statfs *)0; |
| 264 | #endif |
| 265 | error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); |
| 266 | if (error) |
| 267 | return (error); |
| 268 | vp = NFSTOV(np); |
| 269 | cred = crget(); |
| 270 | cred->cr_ngroups = 1; |
| 271 | if (v3 && (nmp->nm_state & NFSSTA_GOTFSINFO) == 0) |
| 272 | (void)nfs_fsinfo(nmp, vp, td); |
| 273 | nfsstats.rpccnt[NFSPROC_FSSTAT]++; |
| 274 | nfsm_reqhead(vp, NFSPROC_FSSTAT, NFSX_FH(v3)); |
| 275 | nfsm_fhtom(vp, v3); |
| 276 | nfsm_request(vp, NFSPROC_FSSTAT, td, cred); |
| 277 | if (v3) |
| 278 | nfsm_postop_attr(vp, retattr); |
| 279 | if (error) { |
| 280 | if (mrep != NULL) |
| 281 | m_freem(mrep); |
| 282 | goto nfsmout; |
| 283 | } |
| 284 | nfsm_dissect(sfp, struct nfs_statfs *, NFSX_STATFS(v3)); |
| 285 | sbp->f_flags = nmp->nm_flag; |
| 286 | sbp->f_iosize = nfs_iosize(nmp); |
| 287 | if (v3) { |
| 288 | sbp->f_bsize = NFS_FABLKSIZE; |
| 289 | tquad = fxdr_hyper(&sfp->sf_tbytes); |
| 290 | sbp->f_blocks = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE)); |
| 291 | tquad = fxdr_hyper(&sfp->sf_fbytes); |
| 292 | sbp->f_bfree = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE)); |
| 293 | tquad = fxdr_hyper(&sfp->sf_abytes); |
| 294 | sbp->f_bavail = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE)); |
| 295 | sbp->f_files = (fxdr_unsigned(int32_t, |
| 296 | sfp->sf_tfiles.nfsuquad[1]) & 0x7fffffff); |
| 297 | sbp->f_ffree = (fxdr_unsigned(int32_t, |
| 298 | sfp->sf_ffiles.nfsuquad[1]) & 0x7fffffff); |
| 299 | } else { |
| 300 | sbp->f_bsize = fxdr_unsigned(int32_t, sfp->sf_bsize); |
| 301 | sbp->f_blocks = fxdr_unsigned(int32_t, sfp->sf_blocks); |
| 302 | sbp->f_bfree = fxdr_unsigned(int32_t, sfp->sf_bfree); |
| 303 | sbp->f_bavail = fxdr_unsigned(int32_t, sfp->sf_bavail); |
| 304 | sbp->f_files = 0; |
| 305 | sbp->f_ffree = 0; |
| 306 | } |
| 307 | if (sbp != &mp->mnt_stat) { |
| 308 | sbp->f_type = mp->mnt_vfc->vfc_typenum; |
| 309 | bcopy(mp->mnt_stat.f_mntonname, sbp->f_mntonname, MNAMELEN); |
| 310 | bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); |
| 311 | } |
| 312 | nfsm_reqdone; |
| 313 | vput(vp); |
| 314 | crfree(cred); |
| 315 | return (error); |
| 316 | } |
| 317 | |
| 318 | /* |
| 319 | * nfs version 3 fsinfo rpc call |
| 320 | */ |
| 321 | int |
| 322 | nfs_fsinfo(struct nfsmount *nmp, struct vnode *vp, struct thread *td) |
| 323 | { |
| 324 | struct nfsv3_fsinfo *fsp; |
| 325 | caddr_t cp; |
| 326 | int32_t t1, t2; |
| 327 | u_int32_t *tl, pref, max; |
| 328 | caddr_t bpos, dpos, cp2; |
| 329 | int error = 0, retattr; |
| 330 | struct mbuf *mreq, *mrep, *md, *mb, *mb2; |
| 331 | u_int64_t maxfsize; |
| 332 | |
| 333 | nfsstats.rpccnt[NFSPROC_FSINFO]++; |
| 334 | nfsm_reqhead(vp, NFSPROC_FSINFO, NFSX_FH(1)); |
| 335 | nfsm_fhtom(vp, 1); |
| 336 | nfsm_request(vp, NFSPROC_FSINFO, td, NFSVPCRED(vp)); |
| 337 | nfsm_postop_attr(vp, retattr); |
| 338 | if (!error) { |
| 339 | nfsm_dissect(fsp, struct nfsv3_fsinfo *, NFSX_V3FSINFO); |
| 340 | pref = fxdr_unsigned(u_int32_t, fsp->fs_wtpref); |
| 341 | if (pref < nmp->nm_wsize && pref >= NFS_FABLKSIZE) |
| 342 | nmp->nm_wsize = (pref + NFS_FABLKSIZE - 1) & |
| 343 | ~(NFS_FABLKSIZE - 1); |
| 344 | max = fxdr_unsigned(u_int32_t, fsp->fs_wtmax); |
| 345 | if (max < nmp->nm_wsize && max > 0) { |
| 346 | nmp->nm_wsize = max & ~(NFS_FABLKSIZE - 1); |
| 347 | if (nmp->nm_wsize == 0) |
| 348 | nmp->nm_wsize = max; |
| 349 | } |
| 350 | pref = fxdr_unsigned(u_int32_t, fsp->fs_rtpref); |
| 351 | if (pref < nmp->nm_rsize && pref >= NFS_FABLKSIZE) |
| 352 | nmp->nm_rsize = (pref + NFS_FABLKSIZE - 1) & |
| 353 | ~(NFS_FABLKSIZE - 1); |
| 354 | max = fxdr_unsigned(u_int32_t, fsp->fs_rtmax); |
| 355 | if (max < nmp->nm_rsize && max > 0) { |
| 356 | nmp->nm_rsize = max & ~(NFS_FABLKSIZE - 1); |
| 357 | if (nmp->nm_rsize == 0) |
| 358 | nmp->nm_rsize = max; |
| 359 | } |
| 360 | pref = fxdr_unsigned(u_int32_t, fsp->fs_dtpref); |
| 361 | if (pref < nmp->nm_readdirsize && pref >= NFS_DIRBLKSIZ) |
| 362 | nmp->nm_readdirsize = (pref + NFS_DIRBLKSIZ - 1) & |
| 363 | ~(NFS_DIRBLKSIZ - 1); |
| 364 | if (max < nmp->nm_readdirsize && max > 0) { |
| 365 | nmp->nm_readdirsize = max & ~(NFS_DIRBLKSIZ - 1); |
| 366 | if (nmp->nm_readdirsize == 0) |
| 367 | nmp->nm_readdirsize = max; |
| 368 | } |
| 369 | maxfsize = fxdr_hyper(&fsp->fs_maxfilesize); |
| 370 | if (maxfsize > 0 && maxfsize < nmp->nm_maxfilesize) |
| 371 | nmp->nm_maxfilesize = maxfsize; |
| 372 | nmp->nm_state |= NFSSTA_GOTFSINFO; |
| 373 | } |
| 374 | nfsm_reqdone; |
| 375 | return (error); |
| 376 | } |
| 377 | |
| 378 | /* |
| 379 | * Mount a remote root fs via. nfs. This depends on the info in the |
| 380 | * nfs_diskless structure that has been filled in properly by some primary |
| 381 | * bootstrap. |
| 382 | * It goes something like this: |
| 383 | * - do enough of "ifconfig" by calling ifioctl() so that the system |
| 384 | * can talk to the server |
| 385 | * - If nfs_diskless.mygateway is filled in, use that address as |
| 386 | * a default gateway. |
| 387 | * - build the rootfs mount point and call mountnfs() to do the rest. |
| 388 | */ |
| 389 | int |
| 390 | nfs_mountroot(mp) |
| 391 | struct mount *mp; |
| 392 | { |
| 393 | struct mount *swap_mp; |
| 394 | struct nfsv3_diskless *nd = &nfsv3_diskless; |
| 395 | struct socket *so; |
| 396 | struct vnode *vp; |
| 397 | struct thread *td = curthread; /* XXX */ |
| 398 | int error, i; |
| 399 | u_long l; |
| 400 | char buf[128]; |
| 401 | |
| 402 | #if defined(BOOTP_NFSROOT) && defined(BOOTP) |
| 403 | bootpc_init(); /* use bootp to get nfs_diskless filled in */ |
| 404 | #endif |
| 405 | |
| 406 | /* |
| 407 | * XXX time must be non-zero when we init the interface or else |
| 408 | * the arp code will wedge... |
| 409 | */ |
| 410 | while (time_second == 0) |
| 411 | tsleep(&time_second, 0, "arpkludge", 10); |
| 412 | |
| 413 | if (nfs_diskless_valid==1) |
| 414 | nfs_convert_diskless(); |
| 415 | |
| 416 | /* |
| 417 | * XXX splnet, so networks will receive... |
| 418 | */ |
| 419 | splnet(); |
| 420 | |
| 421 | #ifdef notyet |
| 422 | /* Set up swap credentials. */ |
| 423 | proc0.p_ucred->cr_uid = ntohl(nd->swap_ucred.cr_uid); |
| 424 | proc0.p_ucred->cr_gid = ntohl(nd->swap_ucred.cr_gid); |
| 425 | if ((proc0.p_ucred->cr_ngroups = ntohs(nd->swap_ucred.cr_ngroups)) > |
| 426 | NGROUPS) |
| 427 | proc0.p_ucred->cr_ngroups = NGROUPS; |
| 428 | for (i = 0; i < proc0.p_ucred->cr_ngroups; i++) |
| 429 | proc0.p_ucred->cr_groups[i] = ntohl(nd->swap_ucred.cr_groups[i]); |
| 430 | #endif |
| 431 | |
| 432 | /* |
| 433 | * Do enough of ifconfig(8) so that the critical net interface can |
| 434 | * talk to the server. |
| 435 | */ |
| 436 | error = socreate(nd->myif.ifra_addr.sa_family, &so, SOCK_DGRAM, 0, td); |
| 437 | if (error) |
| 438 | panic("nfs_mountroot: socreate(%04x): %d", |
| 439 | nd->myif.ifra_addr.sa_family, error); |
| 440 | |
| 441 | #if 0 /* XXX Bad idea */ |
| 442 | /* |
| 443 | * We might not have been told the right interface, so we pass |
| 444 | * over the first ten interfaces of the same kind, until we get |
| 445 | * one of them configured. |
| 446 | */ |
| 447 | |
| 448 | for (i = strlen(nd->myif.ifra_name) - 1; |
| 449 | nd->myif.ifra_name[i] >= '0' && |
| 450 | nd->myif.ifra_name[i] <= '9'; |
| 451 | nd->myif.ifra_name[i] ++) { |
| 452 | error = ifioctl(so, SIOCAIFADDR, (caddr_t)&nd->myif, td); |
| 453 | if(!error) |
| 454 | break; |
| 455 | } |
| 456 | #endif |
| 457 | error = ifioctl(so, SIOCAIFADDR, (caddr_t)&nd->myif, td); |
| 458 | if (error) |
| 459 | panic("nfs_mountroot: SIOCAIFADDR: %d", error); |
| 460 | soclose(so); |
| 461 | |
| 462 | /* |
| 463 | * If the gateway field is filled in, set it as the default route. |
| 464 | */ |
| 465 | if (nd->mygateway.sin_len != 0) { |
| 466 | struct sockaddr_in mask, sin; |
| 467 | |
| 468 | bzero((caddr_t)&mask, sizeof(mask)); |
| 469 | sin = mask; |
| 470 | sin.sin_family = AF_INET; |
| 471 | sin.sin_len = sizeof(sin); |
| 472 | error = rtrequest(RTM_ADD, (struct sockaddr *)&sin, |
| 473 | (struct sockaddr *)&nd->mygateway, |
| 474 | (struct sockaddr *)&mask, |
| 475 | RTF_UP | RTF_GATEWAY, (struct rtentry **)0); |
| 476 | if (error) |
| 477 | panic("nfs_mountroot: RTM_ADD: %d", error); |
| 478 | } |
| 479 | |
| 480 | /* |
| 481 | * Create the rootfs mount point. |
| 482 | */ |
| 483 | nd->root_args.fh = nd->root_fh; |
| 484 | nd->root_args.fhsize = nd->root_fhsize; |
| 485 | l = ntohl(nd->root_saddr.sin_addr.s_addr); |
| 486 | snprintf(buf, sizeof(buf), "%ld.%ld.%ld.%ld:%s", |
| 487 | (l >> 24) & 0xff, (l >> 16) & 0xff, |
| 488 | (l >> 8) & 0xff, (l >> 0) & 0xff,nd->root_hostnam); |
| 489 | printf("NFS ROOT: %s\n",buf); |
| 490 | if ((error = nfs_mountdiskless(buf, "/", MNT_RDONLY, |
| 491 | &nd->root_saddr, &nd->root_args, td, &vp, &mp)) != 0) { |
| 492 | if (swap_mp) { |
| 493 | mp->mnt_vfc->vfc_refcount--; |
| 494 | free(swap_mp, M_MOUNT); |
| 495 | } |
| 496 | return (error); |
| 497 | } |
| 498 | |
| 499 | swap_mp = NULL; |
| 500 | if (nd->swap_nblks) { |
| 501 | |
| 502 | /* Convert to DEV_BSIZE instead of Kilobyte */ |
| 503 | nd->swap_nblks *= 2; |
| 504 | |
| 505 | /* |
| 506 | * Create a fake mount point just for the swap vnode so that the |
| 507 | * swap file can be on a different server from the rootfs. |
| 508 | */ |
| 509 | nd->swap_args.fh = nd->swap_fh; |
| 510 | nd->swap_args.fhsize = nd->swap_fhsize; |
| 511 | l = ntohl(nd->swap_saddr.sin_addr.s_addr); |
| 512 | snprintf(buf, sizeof(buf), "%ld.%ld.%ld.%ld:%s", |
| 513 | (l >> 24) & 0xff, (l >> 16) & 0xff, |
| 514 | (l >> 8) & 0xff, (l >> 0) & 0xff,nd->swap_hostnam); |
| 515 | printf("NFS SWAP: %s\n",buf); |
| 516 | if ((error = nfs_mountdiskless(buf, "/swap", 0, |
| 517 | &nd->swap_saddr, &nd->swap_args, td, &vp, &swap_mp)) != 0) |
| 518 | return (error); |
| 519 | vfs_unbusy(swap_mp, td); |
| 520 | |
| 521 | VTONFS(vp)->n_size = VTONFS(vp)->n_vattr.va_size = |
| 522 | nd->swap_nblks * DEV_BSIZE ; |
| 523 | |
| 524 | /* |
| 525 | * Since the swap file is not the root dir of a file system, |
| 526 | * hack it to a regular file. |
| 527 | */ |
| 528 | vp->v_type = VREG; |
| 529 | vp->v_flag = 0; |
| 530 | VREF(vp); |
| 531 | swaponvp(td, vp, NODEV, nd->swap_nblks); |
| 532 | } |
| 533 | |
| 534 | mp->mnt_flag |= MNT_ROOTFS; |
| 535 | mp->mnt_vnodecovered = NULLVP; |
| 536 | rootvp = vp; |
| 537 | vfs_unbusy(mp, td); |
| 538 | |
| 539 | /* |
| 540 | * This is not really an nfs issue, but it is much easier to |
| 541 | * set hostname here and then let the "/etc/rc.xxx" files |
| 542 | * mount the right /var based upon its preset value. |
| 543 | */ |
| 544 | bcopy(nd->my_hostnam, hostname, MAXHOSTNAMELEN); |
| 545 | hostname[MAXHOSTNAMELEN - 1] = '\0'; |
| 546 | for (i = 0; i < MAXHOSTNAMELEN; i++) |
| 547 | if (hostname[i] == '\0') |
| 548 | break; |
| 549 | inittodr(ntohl(nd->root_time)); |
| 550 | return (0); |
| 551 | } |
| 552 | |
| 553 | /* |
| 554 | * Internal version of mount system call for diskless setup. |
| 555 | */ |
| 556 | static int |
| 557 | nfs_mountdiskless(char *path, char *which, int mountflag, |
| 558 | struct sockaddr_in *sin, struct nfs_args *args, struct thread *td, |
| 559 | struct vnode **vpp, struct mount **mpp) |
| 560 | { |
| 561 | struct mount *mp; |
| 562 | struct sockaddr *nam; |
| 563 | int error; |
| 564 | int didalloc = 0; |
| 565 | |
| 566 | mp = *mpp; |
| 567 | |
| 568 | if (mp == NULL) { |
| 569 | if ((error = vfs_rootmountalloc("nfs", path, &mp)) != 0) { |
| 570 | printf("nfs_mountroot: NFS not configured"); |
| 571 | return (error); |
| 572 | } |
| 573 | didalloc = 1; |
| 574 | } |
| 575 | |
| 576 | mp->mnt_kern_flag = 0; |
| 577 | mp->mnt_flag = mountflag; |
| 578 | nam = dup_sockaddr((struct sockaddr *)sin, 1); |
| 579 | if ((error = mountnfs(args, mp, nam, which, path, vpp)) != 0) { |
| 580 | printf("nfs_mountroot: mount %s on %s: %d", path, which, error); |
| 581 | mp->mnt_vfc->vfc_refcount--; |
| 582 | vfs_unbusy(mp, td); |
| 583 | if (didalloc) |
| 584 | free(mp, M_MOUNT); |
| 585 | FREE(nam, M_SONAME); |
| 586 | return (error); |
| 587 | } |
| 588 | (void) copystr(which, mp->mnt_stat.f_mntonname, MNAMELEN - 1, 0); |
| 589 | *mpp = mp; |
| 590 | return (0); |
| 591 | } |
| 592 | |
| 593 | static void |
| 594 | nfs_decode_args(nmp, argp) |
| 595 | struct nfsmount *nmp; |
| 596 | struct nfs_args *argp; |
| 597 | { |
| 598 | int s; |
| 599 | int adjsock; |
| 600 | int maxio; |
| 601 | |
| 602 | s = splnet(); |
| 603 | /* |
| 604 | * Silently clear NFSMNT_NOCONN if it's a TCP mount, it makes |
| 605 | * no sense in that context. |
| 606 | */ |
| 607 | if (argp->sotype == SOCK_STREAM) |
| 608 | nmp->nm_flag &= ~NFSMNT_NOCONN; |
| 609 | |
| 610 | /* Also clear RDIRPLUS if not NFSv3, it crashes some servers */ |
| 611 | if ((argp->flags & NFSMNT_NFSV3) == 0) |
| 612 | nmp->nm_flag &= ~NFSMNT_RDIRPLUS; |
| 613 | |
| 614 | /* Re-bind if rsrvd port requested and wasn't on one */ |
| 615 | adjsock = !(nmp->nm_flag & NFSMNT_RESVPORT) |
| 616 | && (argp->flags & NFSMNT_RESVPORT); |
| 617 | /* Also re-bind if we're switching to/from a connected UDP socket */ |
| 618 | adjsock |= ((nmp->nm_flag & NFSMNT_NOCONN) != |
| 619 | (argp->flags & NFSMNT_NOCONN)); |
| 620 | |
| 621 | /* Update flags atomically. Don't change the lock bits. */ |
| 622 | nmp->nm_flag = argp->flags | nmp->nm_flag; |
| 623 | splx(s); |
| 624 | |
| 625 | if ((argp->flags & NFSMNT_TIMEO) && argp->timeo > 0) { |
| 626 | nmp->nm_timeo = (argp->timeo * NFS_HZ + 5) / 10; |
| 627 | if (nmp->nm_timeo < NFS_MINTIMEO) |
| 628 | nmp->nm_timeo = NFS_MINTIMEO; |
| 629 | else if (nmp->nm_timeo > NFS_MAXTIMEO) |
| 630 | nmp->nm_timeo = NFS_MAXTIMEO; |
| 631 | } |
| 632 | |
| 633 | if ((argp->flags & NFSMNT_RETRANS) && argp->retrans > 1) { |
| 634 | nmp->nm_retry = argp->retrans; |
| 635 | if (nmp->nm_retry > NFS_MAXREXMIT) |
| 636 | nmp->nm_retry = NFS_MAXREXMIT; |
| 637 | } |
| 638 | |
| 639 | if (argp->flags & NFSMNT_NFSV3) { |
| 640 | if (argp->sotype == SOCK_DGRAM) |
| 641 | maxio = NFS_MAXDGRAMDATA; |
| 642 | else |
| 643 | maxio = NFS_MAXDATA; |
| 644 | } else |
| 645 | maxio = NFS_V2MAXDATA; |
| 646 | |
| 647 | if ((argp->flags & NFSMNT_WSIZE) && argp->wsize > 0) { |
| 648 | nmp->nm_wsize = argp->wsize; |
| 649 | /* Round down to multiple of blocksize */ |
| 650 | nmp->nm_wsize &= ~(NFS_FABLKSIZE - 1); |
| 651 | if (nmp->nm_wsize <= 0) |
| 652 | nmp->nm_wsize = NFS_FABLKSIZE; |
| 653 | } |
| 654 | if (nmp->nm_wsize > maxio) |
| 655 | nmp->nm_wsize = maxio; |
| 656 | if (nmp->nm_wsize > MAXBSIZE) |
| 657 | nmp->nm_wsize = MAXBSIZE; |
| 658 | |
| 659 | if ((argp->flags & NFSMNT_RSIZE) && argp->rsize > 0) { |
| 660 | nmp->nm_rsize = argp->rsize; |
| 661 | /* Round down to multiple of blocksize */ |
| 662 | nmp->nm_rsize &= ~(NFS_FABLKSIZE - 1); |
| 663 | if (nmp->nm_rsize <= 0) |
| 664 | nmp->nm_rsize = NFS_FABLKSIZE; |
| 665 | } |
| 666 | if (nmp->nm_rsize > maxio) |
| 667 | nmp->nm_rsize = maxio; |
| 668 | if (nmp->nm_rsize > MAXBSIZE) |
| 669 | nmp->nm_rsize = MAXBSIZE; |
| 670 | |
| 671 | if ((argp->flags & NFSMNT_READDIRSIZE) && argp->readdirsize > 0) { |
| 672 | nmp->nm_readdirsize = argp->readdirsize; |
| 673 | } |
| 674 | if (nmp->nm_readdirsize > maxio) |
| 675 | nmp->nm_readdirsize = maxio; |
| 676 | if (nmp->nm_readdirsize > nmp->nm_rsize) |
| 677 | nmp->nm_readdirsize = nmp->nm_rsize; |
| 678 | |
| 679 | if ((argp->flags & NFSMNT_ACREGMIN) && argp->acregmin >= 0) |
| 680 | nmp->nm_acregmin = argp->acregmin; |
| 681 | else |
| 682 | nmp->nm_acregmin = NFS_MINATTRTIMO; |
| 683 | if ((argp->flags & NFSMNT_ACREGMAX) && argp->acregmax >= 0) |
| 684 | nmp->nm_acregmax = argp->acregmax; |
| 685 | else |
| 686 | nmp->nm_acregmax = NFS_MAXATTRTIMO; |
| 687 | if ((argp->flags & NFSMNT_ACDIRMIN) && argp->acdirmin >= 0) |
| 688 | nmp->nm_acdirmin = argp->acdirmin; |
| 689 | else |
| 690 | nmp->nm_acdirmin = NFS_MINDIRATTRTIMO; |
| 691 | if ((argp->flags & NFSMNT_ACDIRMAX) && argp->acdirmax >= 0) |
| 692 | nmp->nm_acdirmax = argp->acdirmax; |
| 693 | else |
| 694 | nmp->nm_acdirmax = NFS_MAXDIRATTRTIMO; |
| 695 | if (nmp->nm_acdirmin > nmp->nm_acdirmax) |
| 696 | nmp->nm_acdirmin = nmp->nm_acdirmax; |
| 697 | if (nmp->nm_acregmin > nmp->nm_acregmax) |
| 698 | nmp->nm_acregmin = nmp->nm_acregmax; |
| 699 | |
| 700 | if ((argp->flags & NFSMNT_MAXGRPS) && argp->maxgrouplist >= 0) { |
| 701 | if (argp->maxgrouplist <= NFS_MAXGRPS) |
| 702 | nmp->nm_numgrps = argp->maxgrouplist; |
| 703 | else |
| 704 | nmp->nm_numgrps = NFS_MAXGRPS; |
| 705 | } |
| 706 | if ((argp->flags & NFSMNT_READAHEAD) && argp->readahead >= 0) { |
| 707 | if (argp->readahead <= NFS_MAXRAHEAD) |
| 708 | nmp->nm_readahead = argp->readahead; |
| 709 | else |
| 710 | nmp->nm_readahead = NFS_MAXRAHEAD; |
| 711 | } |
| 712 | if ((argp->flags & NFSMNT_LEASETERM) && argp->leaseterm >= 2) { |
| 713 | if (argp->leaseterm <= NQ_MAXLEASE) |
| 714 | nmp->nm_leaseterm = argp->leaseterm; |
| 715 | else |
| 716 | nmp->nm_leaseterm = NQ_MAXLEASE; |
| 717 | } |
| 718 | if ((argp->flags & NFSMNT_DEADTHRESH) && argp->deadthresh >= 1) { |
| 719 | if (argp->deadthresh <= NQ_NEVERDEAD) |
| 720 | nmp->nm_deadthresh = argp->deadthresh; |
| 721 | else |
| 722 | nmp->nm_deadthresh = NQ_NEVERDEAD; |
| 723 | } |
| 724 | |
| 725 | adjsock |= ((nmp->nm_sotype != argp->sotype) || |
| 726 | (nmp->nm_soproto != argp->proto)); |
| 727 | nmp->nm_sotype = argp->sotype; |
| 728 | nmp->nm_soproto = argp->proto; |
| 729 | |
| 730 | if (nmp->nm_so && adjsock) { |
| 731 | nfs_safedisconnect(nmp); |
| 732 | if (nmp->nm_sotype == SOCK_DGRAM) |
| 733 | while (nfs_connect(nmp, (struct nfsreq *)0)) { |
| 734 | printf("nfs_args: retrying connect\n"); |
| 735 | (void) tsleep((caddr_t)&lbolt, 0, "nfscon", 0); |
| 736 | } |
| 737 | } |
| 738 | } |
| 739 | |
| 740 | /* |
| 741 | * VFS Operations. |
| 742 | * |
| 743 | * mount system call |
| 744 | * It seems a bit dumb to copyinstr() the host and path here and then |
| 745 | * bcopy() them in mountnfs(), but I wanted to detect errors before |
| 746 | * doing the sockargs() call because sockargs() allocates an mbuf and |
| 747 | * an error after that means that I have to release the mbuf. |
| 748 | */ |
| 749 | /* ARGSUSED */ |
| 750 | static int |
| 751 | nfs_mount(struct mount *mp, char *path, caddr_t data, |
| 752 | struct nameidata *ndp, struct thread *td) |
| 753 | { |
| 754 | int error; |
| 755 | struct nfs_args args; |
| 756 | struct sockaddr *nam; |
| 757 | struct vnode *vp; |
| 758 | char pth[MNAMELEN], hst[MNAMELEN]; |
| 759 | size_t len; |
| 760 | u_char nfh[NFSX_V3FHMAX]; |
| 761 | |
| 762 | if (path == NULL) { |
| 763 | nfs_mountroot(mp); |
| 764 | return (0); |
| 765 | } |
| 766 | error = copyin(data, (caddr_t)&args, sizeof (struct nfs_args)); |
| 767 | if (error) |
| 768 | return (error); |
| 769 | if (args.version != NFS_ARGSVERSION) { |
| 770 | #ifdef COMPAT_PRELITE2 |
| 771 | /* |
| 772 | * If the argument version is unknown, then assume the |
| 773 | * caller is a pre-lite2 4.4BSD client and convert its |
| 774 | * arguments. |
| 775 | */ |
| 776 | struct onfs_args oargs; |
| 777 | error = copyin(data, (caddr_t)&oargs, sizeof (struct onfs_args)); |
| 778 | if (error) |
| 779 | return (error); |
| 780 | nfs_convert_oargs(&args,&oargs); |
| 781 | #else /* !COMPAT_PRELITE2 */ |
| 782 | return (EPROGMISMATCH); |
| 783 | #endif /* COMPAT_PRELITE2 */ |
| 784 | } |
| 785 | if (mp->mnt_flag & MNT_UPDATE) { |
| 786 | struct nfsmount *nmp = VFSTONFS(mp); |
| 787 | |
| 788 | if (nmp == NULL) |
| 789 | return (EIO); |
| 790 | /* |
| 791 | * When doing an update, we can't change from or to |
| 792 | * v3 and/or nqnfs, or change cookie translation |
| 793 | */ |
| 794 | args.flags = (args.flags & |
| 795 | ~(NFSMNT_NFSV3|NFSMNT_NQNFS /*|NFSMNT_XLATECOOKIE*/)) | |
| 796 | (nmp->nm_flag & |
| 797 | (NFSMNT_NFSV3|NFSMNT_NQNFS /*|NFSMNT_XLATECOOKIE*/)); |
| 798 | nfs_decode_args(nmp, &args); |
| 799 | return (0); |
| 800 | } |
| 801 | |
| 802 | /* |
| 803 | * Make the nfs_ip_paranoia sysctl serve as the default connection |
| 804 | * or no-connection mode for those protocols that support |
| 805 | * no-connection mode (the flag will be cleared later for protocols |
| 806 | * that do not support no-connection mode). This will allow a client |
| 807 | * to receive replies from a different IP then the request was |
| 808 | * sent to. Note: default value for nfs_ip_paranoia is 1 (paranoid), |
| 809 | * not 0. |
| 810 | */ |
| 811 | if (nfs_ip_paranoia == 0) |
| 812 | args.flags |= NFSMNT_NOCONN; |
| 813 | if (args.fhsize < 0 || args.fhsize > NFSX_V3FHMAX) |
| 814 | return (EINVAL); |
| 815 | error = copyin((caddr_t)args.fh, (caddr_t)nfh, args.fhsize); |
| 816 | if (error) |
| 817 | return (error); |
| 818 | error = copyinstr(path, pth, MNAMELEN-1, &len); |
| 819 | if (error) |
| 820 | return (error); |
| 821 | bzero(&pth[len], MNAMELEN - len); |
| 822 | error = copyinstr(args.hostname, hst, MNAMELEN-1, &len); |
| 823 | if (error) |
| 824 | return (error); |
| 825 | bzero(&hst[len], MNAMELEN - len); |
| 826 | /* sockargs() call must be after above copyin() calls */ |
| 827 | error = getsockaddr(&nam, (caddr_t)args.addr, args.addrlen); |
| 828 | if (error) |
| 829 | return (error); |
| 830 | args.fh = nfh; |
| 831 | error = mountnfs(&args, mp, nam, pth, hst, &vp); |
| 832 | return (error); |
| 833 | } |
| 834 | |
| 835 | /* |
| 836 | * Common code for mount and mountroot |
| 837 | */ |
| 838 | static int |
| 839 | mountnfs(struct nfs_args *argp, struct mount *mp, struct sockaddr *nam, |
| 840 | char *pth, char *hst, struct vnode **vpp) |
| 841 | { |
| 842 | struct nfsmount *nmp; |
| 843 | struct nfsnode *np; |
| 844 | int error; |
| 845 | struct vattr attrs; |
| 846 | |
| 847 | if (mp->mnt_flag & MNT_UPDATE) { |
| 848 | nmp = VFSTONFS(mp); |
| 849 | /* update paths, file handles, etc, here XXX */ |
| 850 | FREE(nam, M_SONAME); |
| 851 | return (0); |
| 852 | } else { |
| 853 | nmp = zalloc(nfsmount_zone); |
| 854 | bzero((caddr_t)nmp, sizeof (struct nfsmount)); |
| 855 | TAILQ_INIT(&nmp->nm_uidlruhead); |
| 856 | TAILQ_INIT(&nmp->nm_bufq); |
| 857 | mp->mnt_data = (qaddr_t)nmp; |
| 858 | } |
| 859 | vfs_getnewfsid(mp); |
| 860 | nmp->nm_mountp = mp; |
| 861 | if (argp->flags & NFSMNT_NQNFS) |
| 862 | /* |
| 863 | * We have to set mnt_maxsymlink to a non-zero value so |
| 864 | * that COMPAT_43 routines will know that we are setting |
| 865 | * the d_type field in directories (and can zero it for |
| 866 | * unsuspecting binaries). |
| 867 | */ |
| 868 | mp->mnt_maxsymlinklen = 1; |
| 869 | |
| 870 | /* |
| 871 | * V2 can only handle 32 bit filesizes. A 4GB-1 limit may be too |
| 872 | * high, depending on whether we end up with negative offsets in |
| 873 | * the client or server somewhere. 2GB-1 may be safer. |
| 874 | * |
| 875 | * For V3, nfs_fsinfo will adjust this as necessary. Assume maximum |
| 876 | * that we can handle until we find out otherwise. |
| 877 | * XXX Our "safe" limit on the client is what we can store in our |
| 878 | * buffer cache using signed(!) block numbers. |
| 879 | */ |
| 880 | if ((argp->flags & NFSMNT_NFSV3) == 0) |
| 881 | nmp->nm_maxfilesize = 0xffffffffLL; |
| 882 | else |
| 883 | nmp->nm_maxfilesize = (u_int64_t)0x80000000 * DEV_BSIZE - 1; |
| 884 | |
| 885 | nmp->nm_timeo = NFS_TIMEO; |
| 886 | nmp->nm_retry = NFS_RETRANS; |
| 887 | nmp->nm_wsize = NFS_WSIZE; |
| 888 | nmp->nm_rsize = NFS_RSIZE; |
| 889 | nmp->nm_readdirsize = NFS_READDIRSIZE; |
| 890 | nmp->nm_numgrps = NFS_MAXGRPS; |
| 891 | nmp->nm_readahead = NFS_DEFRAHEAD; |
| 892 | nmp->nm_leaseterm = NQ_DEFLEASE; |
| 893 | nmp->nm_deadthresh = NQ_DEADTHRESH; |
| 894 | CIRCLEQ_INIT(&nmp->nm_timerhead); |
| 895 | nmp->nm_inprog = NULLVP; |
| 896 | nmp->nm_fhsize = argp->fhsize; |
| 897 | bcopy((caddr_t)argp->fh, (caddr_t)nmp->nm_fh, argp->fhsize); |
| 898 | bcopy(hst, mp->mnt_stat.f_mntfromname, MNAMELEN); |
| 899 | bcopy(pth, mp->mnt_stat.f_mntonname, MNAMELEN); |
| 900 | nmp->nm_nam = nam; |
| 901 | /* Set up the sockets and per-host congestion */ |
| 902 | nmp->nm_sotype = argp->sotype; |
| 903 | nmp->nm_soproto = argp->proto; |
| 904 | nmp->nm_cred = crhold(proc0.p_ucred); |
| 905 | |
| 906 | nfs_decode_args(nmp, argp); |
| 907 | |
| 908 | /* |
| 909 | * For Connection based sockets (TCP,...) defer the connect until |
| 910 | * the first request, in case the server is not responding. |
| 911 | */ |
| 912 | if (nmp->nm_sotype == SOCK_DGRAM && |
| 913 | (error = nfs_connect(nmp, (struct nfsreq *)0))) |
| 914 | goto bad; |
| 915 | |
| 916 | /* |
| 917 | * This is silly, but it has to be set so that vinifod() works. |
| 918 | * We do not want to do an nfs_statfs() here since we can get |
| 919 | * stuck on a dead server and we are holding a lock on the mount |
| 920 | * point. |
| 921 | */ |
| 922 | mp->mnt_stat.f_iosize = nfs_iosize(nmp); |
| 923 | /* |
| 924 | * A reference count is needed on the nfsnode representing the |
| 925 | * remote root. If this object is not persistent, then backward |
| 926 | * traversals of the mount point (i.e. "..") will not work if |
| 927 | * the nfsnode gets flushed out of the cache. Ufs does not have |
| 928 | * this problem, because one can identify root inodes by their |
| 929 | * number == ROOTINO (2). |
| 930 | */ |
| 931 | error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); |
| 932 | if (error) |
| 933 | goto bad; |
| 934 | *vpp = NFSTOV(np); |
| 935 | |
| 936 | /* |
| 937 | * Get file attributes for the mountpoint. This has the side |
| 938 | * effect of filling in (*vpp)->v_type with the correct value. |
| 939 | */ |
| 940 | VOP_GETATTR(*vpp, &attrs, curthread); |
| 941 | |
| 942 | /* |
| 943 | * Lose the lock but keep the ref. |
| 944 | */ |
| 945 | VOP_UNLOCK(*vpp, 0, curthread); |
| 946 | |
| 947 | return (0); |
| 948 | bad: |
| 949 | nfs_disconnect(nmp); |
| 950 | nfs_free_mount(nmp); |
| 951 | FREE(nam, M_SONAME); |
| 952 | return (error); |
| 953 | } |
| 954 | |
| 955 | /* |
| 956 | * unmount system call |
| 957 | */ |
| 958 | static int |
| 959 | nfs_unmount(struct mount *mp, int mntflags, struct thread *td) |
| 960 | { |
| 961 | struct nfsmount *nmp; |
| 962 | int error, flags = 0; |
| 963 | |
| 964 | if (mntflags & MNT_FORCE) |
| 965 | flags |= FORCECLOSE; |
| 966 | nmp = VFSTONFS(mp); |
| 967 | /* |
| 968 | * Goes something like this.. |
| 969 | * - Call vflush() to clear out vnodes for this file system |
| 970 | * - Close the socket |
| 971 | * - Free up the data structures |
| 972 | */ |
| 973 | /* In the forced case, cancel any outstanding requests. */ |
| 974 | if (flags & FORCECLOSE) { |
| 975 | error = nfs_nmcancelreqs(nmp); |
| 976 | if (error) |
| 977 | return (error); |
| 978 | } |
| 979 | /* |
| 980 | * Must handshake with nqnfs_clientd() if it is active. |
| 981 | */ |
| 982 | nmp->nm_state |= NFSSTA_DISMINPROG; |
| 983 | while (nmp->nm_inprog != NULLVP) |
| 984 | (void) tsleep((caddr_t)&lbolt, 0, "nfsdism", 0); |
| 985 | |
| 986 | /* We hold 1 extra ref on the root vnode; see comment in mountnfs(). */ |
| 987 | error = vflush(mp, 1, flags); |
| 988 | if (error) { |
| 989 | nmp->nm_state &= ~NFSSTA_DISMINPROG; |
| 990 | return (error); |
| 991 | } |
| 992 | |
| 993 | /* |
| 994 | * We are now committed to the unmount. |
| 995 | * For NQNFS, let the server daemon free the nfsmount structure. |
| 996 | */ |
| 997 | if (nmp->nm_flag & (NFSMNT_NQNFS | NFSMNT_KERB)) |
| 998 | nmp->nm_state |= NFSSTA_DISMNT; |
| 999 | |
| 1000 | nfs_disconnect(nmp); |
| 1001 | FREE(nmp->nm_nam, M_SONAME); |
| 1002 | |
| 1003 | if ((nmp->nm_flag & (NFSMNT_NQNFS | NFSMNT_KERB)) == 0) |
| 1004 | nfs_free_mount(nmp); |
| 1005 | return (0); |
| 1006 | } |
| 1007 | |
| 1008 | void |
| 1009 | nfs_free_mount(struct nfsmount *nmp) |
| 1010 | { |
| 1011 | if (nmp->nm_cred) { |
| 1012 | crfree(nmp->nm_cred); |
| 1013 | nmp->nm_cred = NULL; |
| 1014 | } |
| 1015 | zfree(nfsmount_zone, nmp); |
| 1016 | } |
| 1017 | |
| 1018 | /* |
| 1019 | * Return root of a filesystem |
| 1020 | */ |
| 1021 | static int |
| 1022 | nfs_root(mp, vpp) |
| 1023 | struct mount *mp; |
| 1024 | struct vnode **vpp; |
| 1025 | { |
| 1026 | struct vnode *vp; |
| 1027 | struct nfsmount *nmp; |
| 1028 | struct nfsnode *np; |
| 1029 | int error; |
| 1030 | |
| 1031 | nmp = VFSTONFS(mp); |
| 1032 | error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); |
| 1033 | if (error) |
| 1034 | return (error); |
| 1035 | vp = NFSTOV(np); |
| 1036 | if (vp->v_type == VNON) |
| 1037 | vp->v_type = VDIR; |
| 1038 | vp->v_flag = VROOT; |
| 1039 | *vpp = vp; |
| 1040 | return (0); |
| 1041 | } |
| 1042 | |
| 1043 | extern int syncprt; |
| 1044 | |
| 1045 | /* |
| 1046 | * Flush out the buffer cache |
| 1047 | */ |
| 1048 | /* ARGSUSED */ |
| 1049 | static int |
| 1050 | nfs_sync(struct mount *mp, int waitfor, struct thread *td) |
| 1051 | { |
| 1052 | struct vnode *vp; |
| 1053 | int error, allerror = 0; |
| 1054 | |
| 1055 | /* |
| 1056 | * Force stale buffer cache information to be flushed. |
| 1057 | */ |
| 1058 | loop: |
| 1059 | for (vp = TAILQ_FIRST(&mp->mnt_nvnodelist); |
| 1060 | vp != NULL; |
| 1061 | vp = TAILQ_NEXT(vp, v_nmntvnodes)) { |
| 1062 | /* |
| 1063 | * If the vnode that we are about to sync is no longer |
| 1064 | * associated with this mount point, start over. |
| 1065 | */ |
| 1066 | if (vp->v_mount != mp) |
| 1067 | goto loop; |
| 1068 | if (VOP_ISLOCKED(vp, NULL) || TAILQ_EMPTY(&vp->v_dirtyblkhd) || |
| 1069 | waitfor == MNT_LAZY) |
| 1070 | continue; |
| 1071 | if (vget(vp, LK_EXCLUSIVE, td)) |
| 1072 | goto loop; |
| 1073 | error = VOP_FSYNC(vp, waitfor, td); |
| 1074 | if (error) |
| 1075 | allerror = error; |
| 1076 | vput(vp); |
| 1077 | } |
| 1078 | return (allerror); |
| 1079 | } |
| 1080 | |