| 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 1.54 2008/07/31 20:23:40 swildner Exp $ |
| 39 | */ |
| 40 | |
| 41 | #include "opt_bootp.h" |
| 42 | #include "opt_nfsroot.h" |
| 43 | |
| 44 | #include <sys/param.h> |
| 45 | #include <sys/sockio.h> |
| 46 | #include <sys/proc.h> |
| 47 | #include <sys/vnode.h> |
| 48 | #include <sys/fcntl.h> |
| 49 | #include <sys/kernel.h> |
| 50 | #include <sys/sysctl.h> |
| 51 | #include <sys/malloc.h> |
| 52 | #include <sys/mount.h> |
| 53 | #include <sys/mbuf.h> |
| 54 | #include <sys/socket.h> |
| 55 | #include <sys/socketvar.h> |
| 56 | #include <sys/systm.h> |
| 57 | |
| 58 | #include <vm/vm.h> |
| 59 | #include <vm/vm_extern.h> |
| 60 | #include <vm/vm_zone.h> |
| 61 | |
| 62 | #include <net/if.h> |
| 63 | #include <net/route.h> |
| 64 | #include <netinet/in.h> |
| 65 | |
| 66 | #include <sys/thread2.h> |
| 67 | #include <sys/mutex2.h> |
| 68 | |
| 69 | #include "rpcv2.h" |
| 70 | #include "nfsproto.h" |
| 71 | #include "nfs.h" |
| 72 | #include "nfsmount.h" |
| 73 | #include "nfsnode.h" |
| 74 | #include "xdr_subs.h" |
| 75 | #include "nfsm_subs.h" |
| 76 | #include "nfsdiskless.h" |
| 77 | #include "nfsmountrpc.h" |
| 78 | |
| 79 | extern int nfs_mountroot(struct mount *mp); |
| 80 | extern void bootpc_init(void); |
| 81 | |
| 82 | extern struct vop_ops nfsv2_vnode_vops; |
| 83 | extern struct vop_ops nfsv2_fifo_vops; |
| 84 | extern struct vop_ops nfsv2_spec_vops; |
| 85 | |
| 86 | MALLOC_DEFINE(M_NFSREQ, "NFS req", "NFS request header"); |
| 87 | MALLOC_DEFINE(M_NFSBIGFH, "NFSV3 bigfh", "NFS version 3 file handle"); |
| 88 | MALLOC_DEFINE(M_NFSD, "NFS daemon", "Nfs server daemon structure"); |
| 89 | MALLOC_DEFINE(M_NFSDIROFF, "NFSV3 diroff", "NFS directory offset data"); |
| 90 | MALLOC_DEFINE(M_NFSRVDESC, "NFSV3 srvdesc", "NFS server socket descriptor"); |
| 91 | MALLOC_DEFINE(M_NFSUID, "NFS uid", "Nfs uid mapping structure"); |
| 92 | MALLOC_DEFINE(M_NFSHASH, "NFS hash", "NFS hash tables"); |
| 93 | |
| 94 | vm_zone_t nfsmount_zone; |
| 95 | |
| 96 | struct nfsstats nfsstats; |
| 97 | SYSCTL_NODE(_vfs, OID_AUTO, nfs, CTLFLAG_RW, 0, "NFS filesystem"); |
| 98 | SYSCTL_STRUCT(_vfs_nfs, NFS_NFSSTATS, nfsstats, CTLFLAG_RD, |
| 99 | &nfsstats, nfsstats, ""); |
| 100 | static int nfs_ip_paranoia = 1; |
| 101 | SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs_ip_paranoia, CTLFLAG_RW, |
| 102 | &nfs_ip_paranoia, 0, ""); |
| 103 | #ifdef NFS_DEBUG |
| 104 | int nfs_debug; |
| 105 | SYSCTL_INT(_vfs_nfs, OID_AUTO, debug, CTLFLAG_RW, &nfs_debug, 0, ""); |
| 106 | #endif |
| 107 | |
| 108 | /* |
| 109 | * Tunable to determine the Read/Write unit size. Maximum value |
| 110 | * is NFS_MAXDATA. We also default to NFS_MAXDATA. |
| 111 | */ |
| 112 | static int nfs_io_size = NFS_MAXDATA; |
| 113 | SYSCTL_INT(_vfs_nfs, OID_AUTO, nfs_io_size, CTLFLAG_RW, |
| 114 | &nfs_io_size, 0, "NFS optimal I/O unit size"); |
| 115 | |
| 116 | static void nfs_decode_args (struct nfsmount *nmp, |
| 117 | struct nfs_args *argp); |
| 118 | static int mountnfs (struct nfs_args *,struct mount *, |
| 119 | struct sockaddr *,char *,char *,struct vnode **); |
| 120 | static int nfs_mount ( struct mount *mp, char *path, caddr_t data, |
| 121 | struct ucred *cred); |
| 122 | static int nfs_unmount ( struct mount *mp, int mntflags); |
| 123 | static int nfs_root ( struct mount *mp, struct vnode **vpp); |
| 124 | static int nfs_statfs ( struct mount *mp, struct statfs *sbp, |
| 125 | struct ucred *cred); |
| 126 | static int nfs_statvfs(struct mount *mp, struct statvfs *sbp, |
| 127 | struct ucred *cred); |
| 128 | static int nfs_sync ( struct mount *mp, int waitfor); |
| 129 | |
| 130 | /* |
| 131 | * nfs vfs operations. |
| 132 | */ |
| 133 | static struct vfsops nfs_vfsops = { |
| 134 | .vfs_mount = nfs_mount, |
| 135 | .vfs_unmount = nfs_unmount, |
| 136 | .vfs_root = nfs_root, |
| 137 | .vfs_statfs = nfs_statfs, |
| 138 | .vfs_statvfs = nfs_statvfs, |
| 139 | .vfs_sync = nfs_sync, |
| 140 | .vfs_init = nfs_init, |
| 141 | .vfs_uninit = nfs_uninit |
| 142 | }; |
| 143 | VFS_SET(nfs_vfsops, nfs, VFCF_NETWORK); |
| 144 | |
| 145 | /* |
| 146 | * This structure must be filled in by a primary bootstrap or bootstrap |
| 147 | * server for a diskless/dataless machine. It is initialized below just |
| 148 | * to ensure that it is allocated to initialized data (.data not .bss). |
| 149 | */ |
| 150 | struct nfs_diskless nfs_diskless = { { { 0 } } }; |
| 151 | struct nfsv3_diskless nfsv3_diskless = { { { 0 } } }; |
| 152 | int nfs_diskless_valid = 0; |
| 153 | |
| 154 | SYSCTL_INT(_vfs_nfs, OID_AUTO, diskless_valid, CTLFLAG_RD, |
| 155 | &nfs_diskless_valid, 0, ""); |
| 156 | |
| 157 | SYSCTL_STRING(_vfs_nfs, OID_AUTO, diskless_rootpath, CTLFLAG_RD, |
| 158 | nfsv3_diskless.root_hostnam, 0, ""); |
| 159 | |
| 160 | SYSCTL_OPAQUE(_vfs_nfs, OID_AUTO, diskless_rootaddr, CTLFLAG_RD, |
| 161 | &nfsv3_diskless.root_saddr, sizeof nfsv3_diskless.root_saddr, |
| 162 | "%Ssockaddr_in", ""); |
| 163 | |
| 164 | SYSCTL_STRING(_vfs_nfs, OID_AUTO, diskless_swappath, CTLFLAG_RD, |
| 165 | nfsv3_diskless.swap_hostnam, 0, ""); |
| 166 | |
| 167 | SYSCTL_OPAQUE(_vfs_nfs, OID_AUTO, diskless_swapaddr, CTLFLAG_RD, |
| 168 | &nfsv3_diskless.swap_saddr, sizeof nfsv3_diskless.swap_saddr, |
| 169 | "%Ssockaddr_in",""); |
| 170 | |
| 171 | |
| 172 | void nfsargs_ntoh (struct nfs_args *); |
| 173 | static int nfs_mountdiskless (char *, char *, int, |
| 174 | struct sockaddr_in *, struct nfs_args *, |
| 175 | struct thread *, struct vnode **, |
| 176 | struct mount **); |
| 177 | static void nfs_convert_diskless (void); |
| 178 | static void nfs_convert_oargs (struct nfs_args *args, |
| 179 | struct onfs_args *oargs); |
| 180 | |
| 181 | /* |
| 182 | * Calculate the buffer I/O block size to use. The maximum V2 block size |
| 183 | * is typically 8K, the maximum datagram size is typically 16K, and the |
| 184 | * maximum V3 block size is typically 32K. The buffer cache tends to work |
| 185 | * best with 16K blocks but we allow 32K for TCP connections. |
| 186 | * |
| 187 | * We force the block size to be at least a page for buffer cache efficiency. |
| 188 | */ |
| 189 | static int |
| 190 | nfs_iosize(int v3, int sotype) |
| 191 | { |
| 192 | int iosize; |
| 193 | int iomax; |
| 194 | |
| 195 | if (v3) { |
| 196 | if (sotype == SOCK_STREAM) |
| 197 | iomax = NFS_MAXDATA; |
| 198 | else |
| 199 | iomax = NFS_MAXDGRAMDATA; |
| 200 | } else { |
| 201 | iomax = NFS_V2MAXDATA; |
| 202 | } |
| 203 | if ((iosize = nfs_io_size) > iomax) |
| 204 | iosize = iomax; |
| 205 | if (iosize < PAGE_SIZE) |
| 206 | iosize = PAGE_SIZE; |
| 207 | |
| 208 | /* |
| 209 | * This is an aweful hack but until the buffer cache is rewritten |
| 210 | * we need it. The problem is that when you combine write() with |
| 211 | * mmap() the vm_page->valid bits can become weird looking |
| 212 | * (e.g. 0xfc). This occurs because NFS uses piecemeal buffers |
| 213 | * at the file EOF. To solve the problem the BIO system needs to |
| 214 | * be guarenteed that the NFS iosize for regular files will be a |
| 215 | * multiple of PAGE_SIZE so it can invalidate the whole page |
| 216 | * rather then just the piece of it owned by the buffer when |
| 217 | * NFS does vinvalbuf() calls. |
| 218 | */ |
| 219 | if (iosize & PAGE_MASK) |
| 220 | iosize = (iosize & ~PAGE_MASK) + PAGE_SIZE; |
| 221 | return iosize; |
| 222 | } |
| 223 | |
| 224 | static void |
| 225 | nfs_convert_oargs(struct nfs_args *args, struct onfs_args *oargs) |
| 226 | { |
| 227 | args->version = NFS_ARGSVERSION; |
| 228 | args->addr = oargs->addr; |
| 229 | args->addrlen = oargs->addrlen; |
| 230 | args->sotype = oargs->sotype; |
| 231 | args->proto = oargs->proto; |
| 232 | args->fh = oargs->fh; |
| 233 | args->fhsize = oargs->fhsize; |
| 234 | args->flags = oargs->flags; |
| 235 | args->wsize = oargs->wsize; |
| 236 | args->rsize = oargs->rsize; |
| 237 | args->readdirsize = oargs->readdirsize; |
| 238 | args->timeo = oargs->timeo; |
| 239 | args->retrans = oargs->retrans; |
| 240 | args->maxgrouplist = oargs->maxgrouplist; |
| 241 | args->readahead = oargs->readahead; |
| 242 | args->deadthresh = oargs->deadthresh; |
| 243 | args->hostname = oargs->hostname; |
| 244 | } |
| 245 | |
| 246 | static void |
| 247 | nfs_convert_diskless(void) |
| 248 | { |
| 249 | int i; |
| 250 | |
| 251 | bcopy(&nfs_diskless.myif, &nfsv3_diskless.myif, |
| 252 | sizeof(struct ifaliasreq)); |
| 253 | bcopy(&nfs_diskless.mygateway, &nfsv3_diskless.mygateway, |
| 254 | sizeof(struct sockaddr_in)); |
| 255 | nfs_convert_oargs(&nfsv3_diskless.swap_args,&nfs_diskless.swap_args); |
| 256 | |
| 257 | bcopy(nfs_diskless.swap_fh,nfsv3_diskless.swap_fh,NFSX_V2FH); |
| 258 | nfsv3_diskless.swap_fhsize = NFSX_V2FH; |
| 259 | for (i = NFSX_V2FH - 1; i >= 0; --i) { |
| 260 | if (nfs_diskless.swap_fh[i]) |
| 261 | break; |
| 262 | } |
| 263 | if (i < 0) |
| 264 | nfsv3_diskless.swap_fhsize = 0; |
| 265 | |
| 266 | bcopy(&nfs_diskless.swap_saddr,&nfsv3_diskless.swap_saddr, |
| 267 | sizeof(struct sockaddr_in)); |
| 268 | bcopy(nfs_diskless.swap_hostnam,nfsv3_diskless.swap_hostnam, MNAMELEN); |
| 269 | nfsv3_diskless.swap_nblks = nfs_diskless.swap_nblks; |
| 270 | bcopy(&nfs_diskless.swap_ucred, &nfsv3_diskless.swap_ucred, |
| 271 | sizeof(struct ucred)); |
| 272 | nfs_convert_oargs(&nfsv3_diskless.root_args,&nfs_diskless.root_args); |
| 273 | |
| 274 | bcopy(nfs_diskless.root_fh,nfsv3_diskless.root_fh,NFSX_V2FH); |
| 275 | nfsv3_diskless.root_fhsize = NFSX_V2FH; |
| 276 | for (i = NFSX_V2FH - 1; i >= 0; --i) { |
| 277 | if (nfs_diskless.root_fh[i]) |
| 278 | break; |
| 279 | } |
| 280 | if (i < 0) |
| 281 | nfsv3_diskless.root_fhsize = 0; |
| 282 | |
| 283 | bcopy(&nfs_diskless.root_saddr,&nfsv3_diskless.root_saddr, |
| 284 | sizeof(struct sockaddr_in)); |
| 285 | bcopy(nfs_diskless.root_hostnam,nfsv3_diskless.root_hostnam, MNAMELEN); |
| 286 | nfsv3_diskless.root_time = nfs_diskless.root_time; |
| 287 | bcopy(nfs_diskless.my_hostnam,nfsv3_diskless.my_hostnam, |
| 288 | MAXHOSTNAMELEN); |
| 289 | nfs_diskless_valid = 3; |
| 290 | } |
| 291 | |
| 292 | /* |
| 293 | * nfs statfs call |
| 294 | */ |
| 295 | int |
| 296 | nfs_statfs(struct mount *mp, struct statfs *sbp, struct ucred *cred) |
| 297 | { |
| 298 | struct vnode *vp; |
| 299 | struct nfs_statfs *sfp; |
| 300 | struct nfsmount *nmp = VFSTONFS(mp); |
| 301 | thread_t td = curthread; |
| 302 | int error = 0, retattr; |
| 303 | struct nfsnode *np; |
| 304 | u_quad_t tquad; |
| 305 | struct nfsm_info info; |
| 306 | |
| 307 | info.mrep = NULL; |
| 308 | info.v3 = (nmp->nm_flag & NFSMNT_NFSV3); |
| 309 | |
| 310 | #ifndef nolint |
| 311 | sfp = NULL; |
| 312 | #endif |
| 313 | error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); |
| 314 | if (error) |
| 315 | return (error); |
| 316 | vp = NFSTOV(np); |
| 317 | /* ignore the passed cred */ |
| 318 | cred = crget(); |
| 319 | cred->cr_ngroups = 1; |
| 320 | if (info.v3 && (nmp->nm_state & NFSSTA_GOTFSINFO) == 0) |
| 321 | (void)nfs_fsinfo(nmp, vp, td); |
| 322 | nfsstats.rpccnt[NFSPROC_FSSTAT]++; |
| 323 | nfsm_reqhead(&info, vp, NFSPROC_FSSTAT, NFSX_FH(info.v3)); |
| 324 | ERROROUT(nfsm_fhtom(&info, vp)); |
| 325 | NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_FSSTAT, td, cred, &error)); |
| 326 | if (info.v3) { |
| 327 | ERROROUT(nfsm_postop_attr(&info, vp, &retattr, |
| 328 | NFS_LATTR_NOSHRINK)); |
| 329 | } |
| 330 | if (error) { |
| 331 | if (info.mrep != NULL) |
| 332 | m_freem(info.mrep); |
| 333 | goto nfsmout; |
| 334 | } |
| 335 | NULLOUT(sfp = nfsm_dissect(&info, NFSX_STATFS(info.v3))); |
| 336 | sbp->f_flags = nmp->nm_flag; |
| 337 | |
| 338 | if (info.v3) { |
| 339 | sbp->f_bsize = NFS_FABLKSIZE; |
| 340 | tquad = fxdr_hyper(&sfp->sf_tbytes); |
| 341 | sbp->f_blocks = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE)); |
| 342 | tquad = fxdr_hyper(&sfp->sf_fbytes); |
| 343 | sbp->f_bfree = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE)); |
| 344 | tquad = fxdr_hyper(&sfp->sf_abytes); |
| 345 | sbp->f_bavail = (long)(tquad / ((u_quad_t)NFS_FABLKSIZE)); |
| 346 | sbp->f_files = (fxdr_unsigned(int32_t, |
| 347 | sfp->sf_tfiles.nfsuquad[1]) & 0x7fffffff); |
| 348 | sbp->f_ffree = (fxdr_unsigned(int32_t, |
| 349 | sfp->sf_ffiles.nfsuquad[1]) & 0x7fffffff); |
| 350 | } else { |
| 351 | sbp->f_bsize = fxdr_unsigned(int32_t, sfp->sf_bsize); |
| 352 | sbp->f_blocks = fxdr_unsigned(int32_t, sfp->sf_blocks); |
| 353 | sbp->f_bfree = fxdr_unsigned(int32_t, sfp->sf_bfree); |
| 354 | sbp->f_bavail = fxdr_unsigned(int32_t, sfp->sf_bavail); |
| 355 | sbp->f_files = 0; |
| 356 | sbp->f_ffree = 0; |
| 357 | } |
| 358 | |
| 359 | /* |
| 360 | * Some values are pre-set in mnt_stat. Note in particular f_iosize |
| 361 | * cannot be changed once the filesystem is mounted as it is used |
| 362 | * as the basis for BIOs. |
| 363 | */ |
| 364 | if (sbp != &mp->mnt_stat) { |
| 365 | sbp->f_type = mp->mnt_vfc->vfc_typenum; |
| 366 | bcopy(mp->mnt_stat.f_mntfromname, sbp->f_mntfromname, MNAMELEN); |
| 367 | sbp->f_iosize = mp->mnt_stat.f_iosize; |
| 368 | } |
| 369 | m_freem(info.mrep); |
| 370 | info.mrep = NULL; |
| 371 | nfsmout: |
| 372 | vput(vp); |
| 373 | crfree(cred); |
| 374 | return (error); |
| 375 | } |
| 376 | |
| 377 | static int |
| 378 | nfs_statvfs(struct mount *mp, struct statvfs *sbp, struct ucred *cred) |
| 379 | { |
| 380 | struct vnode *vp; |
| 381 | struct nfs_statfs *sfp; |
| 382 | struct nfsmount *nmp = VFSTONFS(mp); |
| 383 | thread_t td = curthread; |
| 384 | int error = 0, retattr; |
| 385 | struct nfsnode *np; |
| 386 | struct nfsm_info info; |
| 387 | |
| 388 | info.mrep = NULL; |
| 389 | info.v3 = (nmp->nm_flag & NFSMNT_NFSV3); |
| 390 | |
| 391 | #ifndef nolint |
| 392 | sfp = NULL; |
| 393 | #endif |
| 394 | error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); |
| 395 | if (error) |
| 396 | return (error); |
| 397 | vp = NFSTOV(np); |
| 398 | /* ignore the passed cred */ |
| 399 | cred = crget(); |
| 400 | cred->cr_ngroups = 1; |
| 401 | if (info.v3 && (nmp->nm_state & NFSSTA_GOTFSINFO) == 0) |
| 402 | (void)nfs_fsinfo(nmp, vp, td); |
| 403 | nfsstats.rpccnt[NFSPROC_FSSTAT]++; |
| 404 | nfsm_reqhead(&info, vp, NFSPROC_FSSTAT, NFSX_FH(info.v3)); |
| 405 | ERROROUT(nfsm_fhtom(&info, vp)); |
| 406 | NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_FSSTAT, td, cred, &error)); |
| 407 | if (info.v3) { |
| 408 | ERROROUT(nfsm_postop_attr(&info, vp, &retattr, |
| 409 | NFS_LATTR_NOSHRINK)); |
| 410 | } |
| 411 | if (error) { |
| 412 | if (info.mrep != NULL) |
| 413 | m_freem(info.mrep); |
| 414 | goto nfsmout; |
| 415 | } |
| 416 | NULLOUT(sfp = nfsm_dissect(&info, NFSX_STATFS(info.v3))); |
| 417 | sbp->f_flag = nmp->nm_flag; |
| 418 | sbp->f_owner = nmp->nm_cred->cr_ruid; |
| 419 | |
| 420 | if (info.v3) { |
| 421 | sbp->f_bsize = NFS_FABLKSIZE; |
| 422 | sbp->f_frsize = NFS_FABLKSIZE; |
| 423 | sbp->f_blocks = (fxdr_hyper(&sfp->sf_tbytes) / |
| 424 | ((u_quad_t)NFS_FABLKSIZE)); |
| 425 | sbp->f_bfree = (fxdr_hyper(&sfp->sf_fbytes) / |
| 426 | ((u_quad_t)NFS_FABLKSIZE)); |
| 427 | sbp->f_bavail = (fxdr_hyper(&sfp->sf_abytes) / |
| 428 | ((u_quad_t)NFS_FABLKSIZE)); |
| 429 | sbp->f_files = fxdr_hyper(&sfp->sf_tfiles); |
| 430 | sbp->f_ffree = fxdr_hyper(&sfp->sf_ffiles); |
| 431 | sbp->f_favail = fxdr_hyper(&sfp->sf_afiles); |
| 432 | } else { |
| 433 | sbp->f_bsize = fxdr_unsigned(int32_t, sfp->sf_bsize); |
| 434 | sbp->f_blocks = fxdr_unsigned(int32_t, sfp->sf_blocks); |
| 435 | sbp->f_bfree = fxdr_unsigned(int32_t, sfp->sf_bfree); |
| 436 | sbp->f_bavail = fxdr_unsigned(int32_t, sfp->sf_bavail); |
| 437 | sbp->f_files = 0; |
| 438 | sbp->f_ffree = 0; |
| 439 | sbp->f_favail = 0; |
| 440 | } |
| 441 | sbp->f_syncreads = 0; |
| 442 | sbp->f_syncwrites = 0; |
| 443 | sbp->f_asyncreads = 0; |
| 444 | sbp->f_asyncwrites = 0; |
| 445 | sbp->f_type = mp->mnt_vfc->vfc_typenum; |
| 446 | |
| 447 | m_freem(info.mrep); |
| 448 | info.mrep = NULL; |
| 449 | nfsmout: |
| 450 | vput(vp); |
| 451 | crfree(cred); |
| 452 | return (error); |
| 453 | } |
| 454 | |
| 455 | /* |
| 456 | * nfs version 3 fsinfo rpc call |
| 457 | */ |
| 458 | int |
| 459 | nfs_fsinfo(struct nfsmount *nmp, struct vnode *vp, struct thread *td) |
| 460 | { |
| 461 | struct nfsv3_fsinfo *fsp; |
| 462 | u_int32_t pref, max; |
| 463 | int error = 0, retattr; |
| 464 | u_int64_t maxfsize; |
| 465 | struct nfsm_info info; |
| 466 | |
| 467 | info.v3 = 1; |
| 468 | nfsstats.rpccnt[NFSPROC_FSINFO]++; |
| 469 | nfsm_reqhead(&info, vp, NFSPROC_FSINFO, NFSX_FH(1)); |
| 470 | ERROROUT(nfsm_fhtom(&info, vp)); |
| 471 | NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_FSINFO, td, |
| 472 | nfs_vpcred(vp, ND_READ), &error)); |
| 473 | ERROROUT(nfsm_postop_attr(&info, vp, &retattr, NFS_LATTR_NOSHRINK)); |
| 474 | if (error == 0) { |
| 475 | NULLOUT(fsp = nfsm_dissect(&info, NFSX_V3FSINFO)); |
| 476 | pref = fxdr_unsigned(u_int32_t, fsp->fs_wtpref); |
| 477 | if (pref < nmp->nm_wsize && pref >= NFS_FABLKSIZE) |
| 478 | nmp->nm_wsize = (pref + NFS_FABLKSIZE - 1) & |
| 479 | ~(NFS_FABLKSIZE - 1); |
| 480 | max = fxdr_unsigned(u_int32_t, fsp->fs_wtmax); |
| 481 | if (max < nmp->nm_wsize && max > 0) { |
| 482 | nmp->nm_wsize = max & ~(NFS_FABLKSIZE - 1); |
| 483 | if (nmp->nm_wsize == 0) |
| 484 | nmp->nm_wsize = max; |
| 485 | } |
| 486 | pref = fxdr_unsigned(u_int32_t, fsp->fs_rtpref); |
| 487 | if (pref < nmp->nm_rsize && pref >= NFS_FABLKSIZE) |
| 488 | nmp->nm_rsize = (pref + NFS_FABLKSIZE - 1) & |
| 489 | ~(NFS_FABLKSIZE - 1); |
| 490 | max = fxdr_unsigned(u_int32_t, fsp->fs_rtmax); |
| 491 | if (max < nmp->nm_rsize && max > 0) { |
| 492 | nmp->nm_rsize = max & ~(NFS_FABLKSIZE - 1); |
| 493 | if (nmp->nm_rsize == 0) |
| 494 | nmp->nm_rsize = max; |
| 495 | } |
| 496 | pref = fxdr_unsigned(u_int32_t, fsp->fs_dtpref); |
| 497 | if (pref < nmp->nm_readdirsize && pref >= NFS_DIRBLKSIZ) |
| 498 | nmp->nm_readdirsize = (pref + NFS_DIRBLKSIZ - 1) & |
| 499 | ~(NFS_DIRBLKSIZ - 1); |
| 500 | if (max < nmp->nm_readdirsize && max > 0) { |
| 501 | nmp->nm_readdirsize = max & ~(NFS_DIRBLKSIZ - 1); |
| 502 | if (nmp->nm_readdirsize == 0) |
| 503 | nmp->nm_readdirsize = max; |
| 504 | } |
| 505 | maxfsize = fxdr_hyper(&fsp->fs_maxfilesize); |
| 506 | if (maxfsize > 0 && maxfsize < nmp->nm_maxfilesize) |
| 507 | nmp->nm_maxfilesize = maxfsize; |
| 508 | nmp->nm_state |= NFSSTA_GOTFSINFO; |
| 509 | |
| 510 | /* |
| 511 | * Use the smaller of rsize/wsize for the biosize. |
| 512 | */ |
| 513 | if (nmp->nm_rsize < nmp->nm_wsize) |
| 514 | nmp->nm_mountp->mnt_stat.f_iosize = nmp->nm_rsize; |
| 515 | else |
| 516 | nmp->nm_mountp->mnt_stat.f_iosize = nmp->nm_wsize; |
| 517 | } |
| 518 | m_freem(info.mrep); |
| 519 | info.mrep = NULL; |
| 520 | nfsmout: |
| 521 | return (error); |
| 522 | } |
| 523 | |
| 524 | /* |
| 525 | * Mount a remote root fs via. nfs. This depends on the info in the |
| 526 | * nfs_diskless structure that has been filled in properly by some primary |
| 527 | * bootstrap. |
| 528 | * It goes something like this: |
| 529 | * - do enough of "ifconfig" by calling ifioctl() so that the system |
| 530 | * can talk to the server |
| 531 | * - If nfs_diskless.mygateway is filled in, use that address as |
| 532 | * a default gateway. |
| 533 | * - build the rootfs mount point and call mountnfs() to do the rest. |
| 534 | */ |
| 535 | int |
| 536 | nfs_mountroot(struct mount *mp) |
| 537 | { |
| 538 | struct mount *swap_mp; |
| 539 | struct nfsv3_diskless *nd = &nfsv3_diskless; |
| 540 | struct socket *so; |
| 541 | struct vnode *vp; |
| 542 | struct thread *td = curthread; /* XXX */ |
| 543 | int error, i; |
| 544 | u_long l; |
| 545 | char buf[128]; |
| 546 | |
| 547 | #if defined(BOOTP_NFSROOT) && defined(BOOTP) |
| 548 | bootpc_init(); /* use bootp to get nfs_diskless filled in */ |
| 549 | #endif |
| 550 | |
| 551 | /* |
| 552 | * XXX time must be non-zero when we init the interface or else |
| 553 | * the arp code will wedge... |
| 554 | */ |
| 555 | while (mycpu->gd_time_seconds == 0) |
| 556 | tsleep(mycpu, 0, "arpkludge", 10); |
| 557 | |
| 558 | /* |
| 559 | * The boot code may have passed us a diskless structure. |
| 560 | */ |
| 561 | if (nfs_diskless_valid == 1) |
| 562 | nfs_convert_diskless(); |
| 563 | |
| 564 | #define SINP(sockaddr) ((struct sockaddr_in *)(sockaddr)) |
| 565 | kprintf("nfs_mountroot: interface %s ip %s", |
| 566 | nd->myif.ifra_name, |
| 567 | inet_ntoa(SINP(&nd->myif.ifra_addr)->sin_addr)); |
| 568 | kprintf(" bcast %s", |
| 569 | inet_ntoa(SINP(&nd->myif.ifra_broadaddr)->sin_addr)); |
| 570 | kprintf(" mask %s\n", |
| 571 | inet_ntoa(SINP(&nd->myif.ifra_mask)->sin_addr)); |
| 572 | #undef SINP |
| 573 | |
| 574 | /* |
| 575 | * XXX splnet, so networks will receive... |
| 576 | */ |
| 577 | crit_enter(); |
| 578 | |
| 579 | /* |
| 580 | * BOOTP does not necessarily have to be compiled into the kernel |
| 581 | * for an NFS root to work. If we inherited the network |
| 582 | * configuration for PXEBOOT then pxe_setup_nfsdiskless() has figured |
| 583 | * out our interface for us and all we need to do is ifconfig the |
| 584 | * interface. We only do this if the interface has not already been |
| 585 | * ifconfig'd by e.g. BOOTP. |
| 586 | */ |
| 587 | error = socreate(nd->myif.ifra_addr.sa_family, &so, SOCK_DGRAM, 0, td); |
| 588 | if (error) { |
| 589 | panic("nfs_mountroot: socreate(%04x): %d", |
| 590 | nd->myif.ifra_addr.sa_family, error); |
| 591 | } |
| 592 | |
| 593 | error = ifioctl(so, SIOCAIFADDR, (caddr_t)&nd->myif, proc0.p_ucred); |
| 594 | if (error) |
| 595 | panic("nfs_mountroot: SIOCAIFADDR: %d", error); |
| 596 | |
| 597 | soclose(so, FNONBLOCK); |
| 598 | |
| 599 | /* |
| 600 | * If the gateway field is filled in, set it as the default route. |
| 601 | */ |
| 602 | if (nd->mygateway.sin_len != 0) { |
| 603 | struct sockaddr_in mask, sin; |
| 604 | |
| 605 | bzero((caddr_t)&mask, sizeof(mask)); |
| 606 | sin = mask; |
| 607 | sin.sin_family = AF_INET; |
| 608 | sin.sin_len = sizeof(sin); |
| 609 | kprintf("nfs_mountroot: gateway %s\n", |
| 610 | inet_ntoa(nd->mygateway.sin_addr)); |
| 611 | error = rtrequest_global(RTM_ADD, (struct sockaddr *)&sin, |
| 612 | (struct sockaddr *)&nd->mygateway, |
| 613 | (struct sockaddr *)&mask, |
| 614 | RTF_UP | RTF_GATEWAY); |
| 615 | if (error) |
| 616 | kprintf("nfs_mountroot: unable to set gateway, error %d, continuing anyway\n", error); |
| 617 | } |
| 618 | |
| 619 | /* |
| 620 | * Create the rootfs mount point. |
| 621 | */ |
| 622 | nd->root_args.fh = nd->root_fh; |
| 623 | nd->root_args.fhsize = nd->root_fhsize; |
| 624 | l = ntohl(nd->root_saddr.sin_addr.s_addr); |
| 625 | ksnprintf(buf, sizeof(buf), "%ld.%ld.%ld.%ld:%s", |
| 626 | (l >> 24) & 0xff, (l >> 16) & 0xff, |
| 627 | (l >> 8) & 0xff, (l >> 0) & 0xff,nd->root_hostnam); |
| 628 | kprintf("NFS_ROOT: %s\n",buf); |
| 629 | if ((error = nfs_mountdiskless(buf, "/", MNT_RDONLY, |
| 630 | &nd->root_saddr, &nd->root_args, td, &vp, &mp)) != 0) { |
| 631 | mp->mnt_vfc->vfc_refcount--; |
| 632 | crit_exit(); |
| 633 | return (error); |
| 634 | } |
| 635 | |
| 636 | swap_mp = NULL; |
| 637 | if (nd->swap_nblks) { |
| 638 | |
| 639 | /* Convert to DEV_BSIZE instead of Kilobyte */ |
| 640 | nd->swap_nblks *= 2; |
| 641 | |
| 642 | /* |
| 643 | * Create a fake mount point just for the swap vnode so that the |
| 644 | * swap file can be on a different server from the rootfs. |
| 645 | */ |
| 646 | nd->swap_args.fh = nd->swap_fh; |
| 647 | nd->swap_args.fhsize = nd->swap_fhsize; |
| 648 | l = ntohl(nd->swap_saddr.sin_addr.s_addr); |
| 649 | ksnprintf(buf, sizeof(buf), "%ld.%ld.%ld.%ld:%s", |
| 650 | (l >> 24) & 0xff, (l >> 16) & 0xff, |
| 651 | (l >> 8) & 0xff, (l >> 0) & 0xff,nd->swap_hostnam); |
| 652 | kprintf("NFS SWAP: %s\n",buf); |
| 653 | if ((error = nfs_mountdiskless(buf, "/swap", 0, |
| 654 | &nd->swap_saddr, &nd->swap_args, td, &vp, &swap_mp)) != 0) { |
| 655 | crit_exit(); |
| 656 | return (error); |
| 657 | } |
| 658 | vfs_unbusy(swap_mp); |
| 659 | |
| 660 | VTONFS(vp)->n_size = VTONFS(vp)->n_vattr.va_size = |
| 661 | nd->swap_nblks * DEV_BSIZE ; |
| 662 | |
| 663 | /* |
| 664 | * Since the swap file is not the root dir of a file system, |
| 665 | * hack it to a regular file. |
| 666 | */ |
| 667 | vclrflags(vp, VROOT); |
| 668 | vref(vp); |
| 669 | nfs_setvtype(vp, VREG); |
| 670 | swaponvp(td, vp, nd->swap_nblks); |
| 671 | } |
| 672 | |
| 673 | mp->mnt_flag |= MNT_ROOTFS; |
| 674 | vfs_unbusy(mp); |
| 675 | |
| 676 | /* |
| 677 | * This is not really an nfs issue, but it is much easier to |
| 678 | * set hostname here and then let the "/etc/rc.xxx" files |
| 679 | * mount the right /var based upon its preset value. |
| 680 | */ |
| 681 | bcopy(nd->my_hostnam, hostname, MAXHOSTNAMELEN); |
| 682 | hostname[MAXHOSTNAMELEN - 1] = '\0'; |
| 683 | for (i = 0; i < MAXHOSTNAMELEN; i++) |
| 684 | if (hostname[i] == '\0') |
| 685 | break; |
| 686 | inittodr(ntohl(nd->root_time)); |
| 687 | crit_exit(); |
| 688 | return (0); |
| 689 | } |
| 690 | |
| 691 | /* |
| 692 | * Internal version of mount system call for diskless setup. |
| 693 | */ |
| 694 | static int |
| 695 | nfs_mountdiskless(char *path, char *which, int mountflag, |
| 696 | struct sockaddr_in *sin, struct nfs_args *args, struct thread *td, |
| 697 | struct vnode **vpp, struct mount **mpp) |
| 698 | { |
| 699 | struct mount *mp; |
| 700 | struct sockaddr *nam; |
| 701 | int didalloc = 0; |
| 702 | int error; |
| 703 | |
| 704 | mp = *mpp; |
| 705 | |
| 706 | if (mp == NULL) { |
| 707 | if ((error = vfs_rootmountalloc("nfs", path, &mp)) != 0) { |
| 708 | kprintf("nfs_mountroot: NFS not configured"); |
| 709 | return (error); |
| 710 | } |
| 711 | didalloc = 1; |
| 712 | } |
| 713 | mp->mnt_kern_flag = 0; |
| 714 | mp->mnt_flag = mountflag; |
| 715 | nam = dup_sockaddr((struct sockaddr *)sin); |
| 716 | |
| 717 | #if defined(BOOTP) || defined(NFS_ROOT) |
| 718 | if (args->fhsize == 0) { |
| 719 | char *xpath = path; |
| 720 | |
| 721 | kprintf("NFS_ROOT: No FH passed from loader, attempting mount rpc..."); |
| 722 | while (*xpath && *xpath != ':') |
| 723 | ++xpath; |
| 724 | if (*xpath) |
| 725 | ++xpath; |
| 726 | args->fhsize = 0; |
| 727 | error = md_mount(sin, xpath, args->fh, &args->fhsize, args, td); |
| 728 | if (error) { |
| 729 | kprintf("failed error %d.\n", error); |
| 730 | goto haderror; |
| 731 | } |
| 732 | kprintf("success!\n"); |
| 733 | } |
| 734 | #endif |
| 735 | |
| 736 | if ((error = mountnfs(args, mp, nam, which, path, vpp)) != 0) { |
| 737 | #if defined(BOOTP) || defined(NFS_ROOT) |
| 738 | haderror: |
| 739 | #endif |
| 740 | kprintf("nfs_mountroot: mount %s on %s: %d", path, which, error); |
| 741 | mp->mnt_vfc->vfc_refcount--; |
| 742 | vfs_unbusy(mp); |
| 743 | if (didalloc) |
| 744 | kfree(mp, M_MOUNT); |
| 745 | FREE(nam, M_SONAME); |
| 746 | return (error); |
| 747 | } |
| 748 | *mpp = mp; |
| 749 | return (0); |
| 750 | } |
| 751 | |
| 752 | static void |
| 753 | nfs_decode_args(struct nfsmount *nmp, struct nfs_args *argp) |
| 754 | { |
| 755 | int adjsock; |
| 756 | int maxio; |
| 757 | |
| 758 | crit_enter(); |
| 759 | /* |
| 760 | * Silently clear NFSMNT_NOCONN if it's a TCP mount, it makes |
| 761 | * no sense in that context. |
| 762 | */ |
| 763 | if (nmp->nm_sotype == SOCK_STREAM) |
| 764 | nmp->nm_flag &= ~NFSMNT_NOCONN; |
| 765 | |
| 766 | /* Also clear RDIRPLUS if not NFSv3, it crashes some servers */ |
| 767 | if ((argp->flags & NFSMNT_NFSV3) == 0) |
| 768 | nmp->nm_flag &= ~NFSMNT_RDIRPLUS; |
| 769 | |
| 770 | /* |
| 771 | * Re-bind if rsrvd port flag has changed |
| 772 | */ |
| 773 | adjsock = (nmp->nm_flag & NFSMNT_RESVPORT) != |
| 774 | (argp->flags & NFSMNT_RESVPORT); |
| 775 | |
| 776 | /* Update flags atomically. Don't change the lock bits. */ |
| 777 | nmp->nm_flag = argp->flags | nmp->nm_flag; |
| 778 | crit_exit(); |
| 779 | |
| 780 | if ((argp->flags & NFSMNT_TIMEO) && argp->timeo > 0) { |
| 781 | nmp->nm_timeo = (argp->timeo * NFS_HZ + 5) / 10; |
| 782 | if (nmp->nm_timeo < NFS_MINTIMEO) |
| 783 | nmp->nm_timeo = NFS_MINTIMEO; |
| 784 | else if (nmp->nm_timeo > NFS_MAXTIMEO) |
| 785 | nmp->nm_timeo = NFS_MAXTIMEO; |
| 786 | } |
| 787 | |
| 788 | if ((argp->flags & NFSMNT_RETRANS) && argp->retrans > 1) { |
| 789 | nmp->nm_retry = argp->retrans; |
| 790 | if (nmp->nm_retry > NFS_MAXREXMIT) |
| 791 | nmp->nm_retry = NFS_MAXREXMIT; |
| 792 | } |
| 793 | |
| 794 | /* |
| 795 | * These parameters effect the buffer cache and cannot be changed |
| 796 | * once we've successfully mounted. |
| 797 | */ |
| 798 | if ((nmp->nm_state & NFSSTA_GOTFSINFO) == 0) { |
| 799 | maxio = nfs_iosize(argp->flags & NFSMNT_NFSV3, nmp->nm_sotype); |
| 800 | |
| 801 | if ((argp->flags & NFSMNT_WSIZE) && argp->wsize > 0) { |
| 802 | nmp->nm_wsize = argp->wsize; |
| 803 | /* Round down to multiple of blocksize */ |
| 804 | nmp->nm_wsize &= ~(NFS_FABLKSIZE - 1); |
| 805 | if (nmp->nm_wsize <= 0) |
| 806 | nmp->nm_wsize = NFS_FABLKSIZE; |
| 807 | } |
| 808 | if (nmp->nm_wsize > maxio) |
| 809 | nmp->nm_wsize = maxio; |
| 810 | if (nmp->nm_wsize > MAXBSIZE) |
| 811 | nmp->nm_wsize = MAXBSIZE; |
| 812 | |
| 813 | if ((argp->flags & NFSMNT_RSIZE) && argp->rsize > 0) { |
| 814 | nmp->nm_rsize = argp->rsize; |
| 815 | /* Round down to multiple of blocksize */ |
| 816 | nmp->nm_rsize &= ~(NFS_FABLKSIZE - 1); |
| 817 | if (nmp->nm_rsize <= 0) |
| 818 | nmp->nm_rsize = NFS_FABLKSIZE; |
| 819 | } |
| 820 | if (nmp->nm_rsize > maxio) |
| 821 | nmp->nm_rsize = maxio; |
| 822 | if (nmp->nm_rsize > MAXBSIZE) |
| 823 | nmp->nm_rsize = MAXBSIZE; |
| 824 | |
| 825 | if ((argp->flags & NFSMNT_READDIRSIZE) && |
| 826 | argp->readdirsize > 0) { |
| 827 | nmp->nm_readdirsize = argp->readdirsize; |
| 828 | } |
| 829 | if (nmp->nm_readdirsize > maxio) |
| 830 | nmp->nm_readdirsize = maxio; |
| 831 | if (nmp->nm_readdirsize > nmp->nm_rsize) |
| 832 | nmp->nm_readdirsize = nmp->nm_rsize; |
| 833 | } |
| 834 | |
| 835 | if ((argp->flags & NFSMNT_ACREGMIN) && argp->acregmin >= 0) |
| 836 | nmp->nm_acregmin = argp->acregmin; |
| 837 | else |
| 838 | nmp->nm_acregmin = NFS_MINATTRTIMO; |
| 839 | if ((argp->flags & NFSMNT_ACREGMAX) && argp->acregmax >= 0) |
| 840 | nmp->nm_acregmax = argp->acregmax; |
| 841 | else |
| 842 | nmp->nm_acregmax = NFS_MAXATTRTIMO; |
| 843 | if ((argp->flags & NFSMNT_ACDIRMIN) && argp->acdirmin >= 0) |
| 844 | nmp->nm_acdirmin = argp->acdirmin; |
| 845 | else |
| 846 | nmp->nm_acdirmin = NFS_MINDIRATTRTIMO; |
| 847 | if ((argp->flags & NFSMNT_ACDIRMAX) && argp->acdirmax >= 0) |
| 848 | nmp->nm_acdirmax = argp->acdirmax; |
| 849 | else |
| 850 | nmp->nm_acdirmax = NFS_MAXDIRATTRTIMO; |
| 851 | if (nmp->nm_acdirmin > nmp->nm_acdirmax) |
| 852 | nmp->nm_acdirmin = nmp->nm_acdirmax; |
| 853 | if (nmp->nm_acregmin > nmp->nm_acregmax) |
| 854 | nmp->nm_acregmin = nmp->nm_acregmax; |
| 855 | |
| 856 | if ((argp->flags & NFSMNT_MAXGRPS) && argp->maxgrouplist >= 0) { |
| 857 | if (argp->maxgrouplist <= NFS_MAXGRPS) |
| 858 | nmp->nm_numgrps = argp->maxgrouplist; |
| 859 | else |
| 860 | nmp->nm_numgrps = NFS_MAXGRPS; |
| 861 | } |
| 862 | if ((argp->flags & NFSMNT_READAHEAD) && argp->readahead >= 0) { |
| 863 | if (argp->readahead <= NFS_MAXRAHEAD) |
| 864 | nmp->nm_readahead = argp->readahead; |
| 865 | else |
| 866 | nmp->nm_readahead = NFS_MAXRAHEAD; |
| 867 | } |
| 868 | if ((argp->flags & NFSMNT_DEADTHRESH) && argp->deadthresh >= 1) { |
| 869 | if (argp->deadthresh <= NFS_NEVERDEAD) |
| 870 | nmp->nm_deadthresh = argp->deadthresh; |
| 871 | else |
| 872 | nmp->nm_deadthresh = NFS_NEVERDEAD; |
| 873 | } |
| 874 | |
| 875 | if (nmp->nm_so && adjsock) { |
| 876 | nfs_safedisconnect(nmp); |
| 877 | if (nmp->nm_sotype == SOCK_DGRAM) |
| 878 | while (nfs_connect(nmp, NULL)) { |
| 879 | kprintf("nfs_args: retrying connect\n"); |
| 880 | (void) tsleep((caddr_t)&lbolt, 0, "nfscon", 0); |
| 881 | } |
| 882 | } |
| 883 | } |
| 884 | |
| 885 | /* |
| 886 | * VFS Operations. |
| 887 | * |
| 888 | * mount system call |
| 889 | * It seems a bit dumb to copyinstr() the host and path here and then |
| 890 | * bcopy() them in mountnfs(), but I wanted to detect errors before |
| 891 | * doing the sockargs() call because sockargs() allocates an mbuf and |
| 892 | * an error after that means that I have to release the mbuf. |
| 893 | */ |
| 894 | /* ARGSUSED */ |
| 895 | static int |
| 896 | nfs_mount(struct mount *mp, char *path, caddr_t data, struct ucred *cred) |
| 897 | { |
| 898 | int error; |
| 899 | struct nfs_args args; |
| 900 | struct sockaddr *nam; |
| 901 | struct vnode *vp; |
| 902 | char pth[MNAMELEN], hst[MNAMELEN]; |
| 903 | size_t len; |
| 904 | u_char nfh[NFSX_V3FHMAX]; |
| 905 | |
| 906 | if (path == NULL) { |
| 907 | nfs_mountroot(mp); |
| 908 | return (0); |
| 909 | } |
| 910 | error = copyin(data, (caddr_t)&args, sizeof (struct nfs_args)); |
| 911 | if (error) |
| 912 | return (error); |
| 913 | if (args.version != NFS_ARGSVERSION) { |
| 914 | #ifdef COMPAT_PRELITE2 |
| 915 | /* |
| 916 | * If the argument version is unknown, then assume the |
| 917 | * caller is a pre-lite2 4.4BSD client and convert its |
| 918 | * arguments. |
| 919 | */ |
| 920 | struct onfs_args oargs; |
| 921 | error = copyin(data, (caddr_t)&oargs, sizeof (struct onfs_args)); |
| 922 | if (error) |
| 923 | return (error); |
| 924 | nfs_convert_oargs(&args,&oargs); |
| 925 | #else /* !COMPAT_PRELITE2 */ |
| 926 | return (EPROGMISMATCH); |
| 927 | #endif /* COMPAT_PRELITE2 */ |
| 928 | } |
| 929 | if (mp->mnt_flag & MNT_UPDATE) { |
| 930 | struct nfsmount *nmp = VFSTONFS(mp); |
| 931 | |
| 932 | if (nmp == NULL) |
| 933 | return (EIO); |
| 934 | /* |
| 935 | * When doing an update, we can't change from or to |
| 936 | * v3, or change cookie translation, or rsize or wsize. |
| 937 | */ |
| 938 | args.flags &= ~(NFSMNT_NFSV3 | NFSMNT_RSIZE | NFSMNT_WSIZE); |
| 939 | args.flags |= nmp->nm_flag & (NFSMNT_NFSV3); |
| 940 | nfs_decode_args(nmp, &args); |
| 941 | return (0); |
| 942 | } |
| 943 | |
| 944 | /* |
| 945 | * Make the nfs_ip_paranoia sysctl serve as the default connection |
| 946 | * or no-connection mode for those protocols that support |
| 947 | * no-connection mode (the flag will be cleared later for protocols |
| 948 | * that do not support no-connection mode). This will allow a client |
| 949 | * to receive replies from a different IP then the request was |
| 950 | * sent to. Note: default value for nfs_ip_paranoia is 1 (paranoid), |
| 951 | * not 0. |
| 952 | */ |
| 953 | if (nfs_ip_paranoia == 0) |
| 954 | args.flags |= NFSMNT_NOCONN; |
| 955 | if (args.fhsize < 0 || args.fhsize > NFSX_V3FHMAX) |
| 956 | return (EINVAL); |
| 957 | error = copyin((caddr_t)args.fh, (caddr_t)nfh, args.fhsize); |
| 958 | if (error) |
| 959 | return (error); |
| 960 | error = copyinstr(path, pth, MNAMELEN-1, &len); |
| 961 | if (error) |
| 962 | return (error); |
| 963 | bzero(&pth[len], MNAMELEN - len); |
| 964 | error = copyinstr(args.hostname, hst, MNAMELEN-1, &len); |
| 965 | if (error) |
| 966 | return (error); |
| 967 | bzero(&hst[len], MNAMELEN - len); |
| 968 | /* sockargs() call must be after above copyin() calls */ |
| 969 | error = getsockaddr(&nam, (caddr_t)args.addr, args.addrlen); |
| 970 | if (error) |
| 971 | return (error); |
| 972 | args.fh = nfh; |
| 973 | error = mountnfs(&args, mp, nam, pth, hst, &vp); |
| 974 | return (error); |
| 975 | } |
| 976 | |
| 977 | /* |
| 978 | * Common code for mount and mountroot |
| 979 | */ |
| 980 | static int |
| 981 | mountnfs(struct nfs_args *argp, struct mount *mp, struct sockaddr *nam, |
| 982 | char *pth, char *hst, struct vnode **vpp) |
| 983 | { |
| 984 | struct nfsmount *nmp; |
| 985 | struct nfsnode *np; |
| 986 | int error; |
| 987 | int rxcpu; |
| 988 | int txcpu; |
| 989 | |
| 990 | if (mp->mnt_flag & MNT_UPDATE) { |
| 991 | nmp = VFSTONFS(mp); |
| 992 | /* update paths, file handles, etc, here XXX */ |
| 993 | FREE(nam, M_SONAME); |
| 994 | return (0); |
| 995 | } else { |
| 996 | nmp = zalloc(nfsmount_zone); |
| 997 | bzero((caddr_t)nmp, sizeof (struct nfsmount)); |
| 998 | mtx_init(&nmp->nm_rxlock); |
| 999 | mtx_init(&nmp->nm_txlock); |
| 1000 | TAILQ_INIT(&nmp->nm_uidlruhead); |
| 1001 | TAILQ_INIT(&nmp->nm_bioq); |
| 1002 | TAILQ_INIT(&nmp->nm_reqq); |
| 1003 | TAILQ_INIT(&nmp->nm_reqtxq); |
| 1004 | TAILQ_INIT(&nmp->nm_reqrxq); |
| 1005 | mp->mnt_data = (qaddr_t)nmp; |
| 1006 | } |
| 1007 | vfs_getnewfsid(mp); |
| 1008 | nmp->nm_mountp = mp; |
| 1009 | |
| 1010 | /* |
| 1011 | * V2 can only handle 32 bit filesizes. A 4GB-1 limit may be too |
| 1012 | * high, depending on whether we end up with negative offsets in |
| 1013 | * the client or server somewhere. 2GB-1 may be safer. |
| 1014 | * |
| 1015 | * For V3, nfs_fsinfo will adjust this as necessary. Assume maximum |
| 1016 | * that we can handle until we find out otherwise. |
| 1017 | * XXX Our "safe" limit on the client is what we can store in our |
| 1018 | * buffer cache using signed(!) block numbers. |
| 1019 | */ |
| 1020 | if ((argp->flags & NFSMNT_NFSV3) == 0) |
| 1021 | nmp->nm_maxfilesize = 0xffffffffLL; |
| 1022 | else |
| 1023 | nmp->nm_maxfilesize = (u_int64_t)0x80000000 * DEV_BSIZE - 1; |
| 1024 | |
| 1025 | nmp->nm_timeo = NFS_TIMEO; |
| 1026 | nmp->nm_retry = NFS_RETRANS; |
| 1027 | nmp->nm_wsize = nfs_iosize(argp->flags & NFSMNT_NFSV3, argp->sotype); |
| 1028 | nmp->nm_rsize = nmp->nm_wsize; |
| 1029 | nmp->nm_readdirsize = NFS_READDIRSIZE; |
| 1030 | nmp->nm_numgrps = NFS_MAXGRPS; |
| 1031 | nmp->nm_readahead = NFS_DEFRAHEAD; |
| 1032 | nmp->nm_deadthresh = NFS_DEADTHRESH; |
| 1033 | nmp->nm_fhsize = argp->fhsize; |
| 1034 | bcopy((caddr_t)argp->fh, (caddr_t)nmp->nm_fh, argp->fhsize); |
| 1035 | bcopy(hst, mp->mnt_stat.f_mntfromname, MNAMELEN); |
| 1036 | nmp->nm_nam = nam; |
| 1037 | /* Set up the sockets and per-host congestion */ |
| 1038 | nmp->nm_sotype = argp->sotype; |
| 1039 | nmp->nm_soproto = argp->proto; |
| 1040 | nmp->nm_cred = crhold(proc0.p_ucred); |
| 1041 | |
| 1042 | nfs_decode_args(nmp, argp); |
| 1043 | |
| 1044 | /* |
| 1045 | * For Connection based sockets (TCP,...) defer the connect until |
| 1046 | * the first request, in case the server is not responding. |
| 1047 | */ |
| 1048 | if (nmp->nm_sotype == SOCK_DGRAM && |
| 1049 | (error = nfs_connect(nmp, NULL))) |
| 1050 | goto bad; |
| 1051 | |
| 1052 | /* |
| 1053 | * This is silly, but it has to be set so that vinifod() works. |
| 1054 | * We do not want to do an nfs_statfs() here since we can get |
| 1055 | * stuck on a dead server and we are holding a lock on the mount |
| 1056 | * point. |
| 1057 | */ |
| 1058 | mp->mnt_stat.f_iosize = |
| 1059 | nfs_iosize(nmp->nm_flag & NFSMNT_NFSV3, nmp->nm_sotype); |
| 1060 | |
| 1061 | /* |
| 1062 | * Install vop_ops for our vnops |
| 1063 | */ |
| 1064 | vfs_add_vnodeops(mp, &nfsv2_vnode_vops, &mp->mnt_vn_norm_ops); |
| 1065 | vfs_add_vnodeops(mp, &nfsv2_spec_vops, &mp->mnt_vn_spec_ops); |
| 1066 | vfs_add_vnodeops(mp, &nfsv2_fifo_vops, &mp->mnt_vn_fifo_ops); |
| 1067 | |
| 1068 | /* |
| 1069 | * A reference count is needed on the nfsnode representing the |
| 1070 | * remote root. If this object is not persistent, then backward |
| 1071 | * traversals of the mount point (i.e. "..") will not work if |
| 1072 | * the nfsnode gets flushed out of the cache. Ufs does not have |
| 1073 | * this problem, because one can identify root inodes by their |
| 1074 | * number == ROOTINO (2). |
| 1075 | */ |
| 1076 | error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); |
| 1077 | if (error) |
| 1078 | goto bad; |
| 1079 | *vpp = NFSTOV(np); |
| 1080 | |
| 1081 | /* |
| 1082 | * Retrieval of mountpoint attributes is delayed until nfs_rot |
| 1083 | * or nfs_statfs are first called. This will happen either when |
| 1084 | * we first traverse the mount point or if somebody does a df(1). |
| 1085 | * |
| 1086 | * NFSSTA_GOTFSINFO is used to flag if we have successfully |
| 1087 | * retrieved mountpoint attributes. In the case of NFSv3 we |
| 1088 | * also flag static fsinfo. |
| 1089 | */ |
| 1090 | if (*vpp != NULL) |
| 1091 | (*vpp)->v_type = VNON; |
| 1092 | |
| 1093 | /* |
| 1094 | * Lose the lock but keep the ref. |
| 1095 | */ |
| 1096 | vn_unlock(*vpp); |
| 1097 | TAILQ_INSERT_TAIL(&nfs_mountq, nmp, nm_entry); |
| 1098 | |
| 1099 | #ifdef SMP |
| 1100 | switch(ncpus) { |
| 1101 | case 0: |
| 1102 | case 1: |
| 1103 | rxcpu = 0; |
| 1104 | txcpu = 0; |
| 1105 | break; |
| 1106 | case 2: |
| 1107 | rxcpu = 0; |
| 1108 | txcpu = 1; |
| 1109 | break; |
| 1110 | default: |
| 1111 | rxcpu = 1; |
| 1112 | txcpu = 2; |
| 1113 | break; |
| 1114 | } |
| 1115 | #else |
| 1116 | rxcpu = 0; |
| 1117 | txcpu = 0; |
| 1118 | #endif |
| 1119 | |
| 1120 | /* |
| 1121 | * Start the reader and writer threads. |
| 1122 | */ |
| 1123 | lwkt_create(nfssvc_iod_reader, nmp, &nmp->nm_rxthread, |
| 1124 | NULL, 0, rxcpu, "nfsiod_rx"); |
| 1125 | lwkt_create(nfssvc_iod_writer, nmp, &nmp->nm_txthread, |
| 1126 | NULL, 0, txcpu, "nfsiod_tx"); |
| 1127 | |
| 1128 | return (0); |
| 1129 | bad: |
| 1130 | nfs_disconnect(nmp); |
| 1131 | nfs_free_mount(nmp); |
| 1132 | return (error); |
| 1133 | } |
| 1134 | |
| 1135 | /* |
| 1136 | * unmount system call |
| 1137 | */ |
| 1138 | static int |
| 1139 | nfs_unmount(struct mount *mp, int mntflags) |
| 1140 | { |
| 1141 | struct nfsmount *nmp; |
| 1142 | int error, flags = 0; |
| 1143 | |
| 1144 | nmp = VFSTONFS(mp); |
| 1145 | if (mntflags & MNT_FORCE) { |
| 1146 | flags |= FORCECLOSE; |
| 1147 | nmp->nm_flag |= NFSMNT_FORCE; |
| 1148 | } |
| 1149 | |
| 1150 | /* |
| 1151 | * Goes something like this.. |
| 1152 | * - Call vflush() to clear out vnodes for this file system |
| 1153 | * - Close the socket |
| 1154 | * - Free up the data structures |
| 1155 | */ |
| 1156 | /* In the forced case, cancel any outstanding requests. */ |
| 1157 | if (flags & FORCECLOSE) { |
| 1158 | error = nfs_nmcancelreqs(nmp); |
| 1159 | if (error) { |
| 1160 | kprintf("NFS: %s: Unable to cancel all requests\n", |
| 1161 | mp->mnt_stat.f_mntfromname); |
| 1162 | /* continue anyway */ |
| 1163 | } |
| 1164 | } |
| 1165 | |
| 1166 | /* |
| 1167 | * Must handshake with nfs_clientd() if it is active. XXX |
| 1168 | */ |
| 1169 | nmp->nm_state |= NFSSTA_DISMINPROG; |
| 1170 | |
| 1171 | /* |
| 1172 | * We hold 1 extra ref on the root vnode; see comment in mountnfs(). |
| 1173 | * |
| 1174 | * If this doesn't work and we are doing a forced unmount we continue |
| 1175 | * anyway. |
| 1176 | */ |
| 1177 | error = vflush(mp, 1, flags); |
| 1178 | if (error) { |
| 1179 | nmp->nm_state &= ~NFSSTA_DISMINPROG; |
| 1180 | if ((flags & FORCECLOSE) == 0) |
| 1181 | return (error); |
| 1182 | } |
| 1183 | |
| 1184 | /* |
| 1185 | * We are now committed to the unmount. |
| 1186 | * For NQNFS, let the server daemon free the nfsmount structure. |
| 1187 | */ |
| 1188 | if (nmp->nm_flag & NFSMNT_KERB) |
| 1189 | nmp->nm_state |= NFSSTA_DISMNT; |
| 1190 | nfssvc_iod_stop1(nmp); |
| 1191 | nfs_disconnect(nmp); |
| 1192 | nfssvc_iod_stop2(nmp); |
| 1193 | TAILQ_REMOVE(&nfs_mountq, nmp, nm_entry); |
| 1194 | |
| 1195 | if ((nmp->nm_flag & NFSMNT_KERB) == 0) { |
| 1196 | nfs_free_mount(nmp); |
| 1197 | } |
| 1198 | return (0); |
| 1199 | } |
| 1200 | |
| 1201 | void |
| 1202 | nfs_free_mount(struct nfsmount *nmp) |
| 1203 | { |
| 1204 | if (nmp->nm_cred) { |
| 1205 | crfree(nmp->nm_cred); |
| 1206 | nmp->nm_cred = NULL; |
| 1207 | } |
| 1208 | if (nmp->nm_nam) { |
| 1209 | FREE(nmp->nm_nam, M_SONAME); |
| 1210 | nmp->nm_nam = NULL; |
| 1211 | } |
| 1212 | zfree(nfsmount_zone, nmp); |
| 1213 | } |
| 1214 | |
| 1215 | /* |
| 1216 | * Return root of a filesystem |
| 1217 | */ |
| 1218 | static int |
| 1219 | nfs_root(struct mount *mp, struct vnode **vpp) |
| 1220 | { |
| 1221 | struct vnode *vp; |
| 1222 | struct nfsmount *nmp; |
| 1223 | struct vattr attrs; |
| 1224 | struct nfsnode *np; |
| 1225 | int error; |
| 1226 | |
| 1227 | nmp = VFSTONFS(mp); |
| 1228 | error = nfs_nget(mp, (nfsfh_t *)nmp->nm_fh, nmp->nm_fhsize, &np); |
| 1229 | if (error) |
| 1230 | return (error); |
| 1231 | vp = NFSTOV(np); |
| 1232 | |
| 1233 | /* |
| 1234 | * Get transfer parameters and root vnode attributes |
| 1235 | * |
| 1236 | * NOTE: nfs_fsinfo() is expected to override the default |
| 1237 | * f_iosize we set. |
| 1238 | */ |
| 1239 | if ((nmp->nm_state & NFSSTA_GOTFSINFO) == 0) { |
| 1240 | if (nmp->nm_flag & NFSMNT_NFSV3) { |
| 1241 | mp->mnt_stat.f_iosize = nfs_iosize(1, nmp->nm_sotype); |
| 1242 | error = nfs_fsinfo(nmp, vp, curthread); |
| 1243 | } else { |
| 1244 | if ((error = VOP_GETATTR(vp, &attrs)) == 0) |
| 1245 | nmp->nm_state |= NFSSTA_GOTFSINFO; |
| 1246 | |
| 1247 | } |
| 1248 | } else { |
| 1249 | /* |
| 1250 | * The root vnode is usually cached by the namecache so do not |
| 1251 | * try to avoid going over the wire even if we have previous |
| 1252 | * information cached. A stale NFS mount can loop |
| 1253 | * forever resolving the root vnode if we return no-error when |
| 1254 | * there is in fact an error. |
| 1255 | */ |
| 1256 | np->n_attrstamp = 0; |
| 1257 | error = VOP_GETATTR(vp, &attrs); |
| 1258 | } |
| 1259 | if (vp->v_type == VNON) |
| 1260 | nfs_setvtype(vp, VDIR); |
| 1261 | vsetflags(vp, VROOT); |
| 1262 | if (error) |
| 1263 | vput(vp); |
| 1264 | else |
| 1265 | *vpp = vp; |
| 1266 | return (error); |
| 1267 | } |
| 1268 | |
| 1269 | struct scaninfo { |
| 1270 | int rescan; |
| 1271 | int waitfor; |
| 1272 | int allerror; |
| 1273 | }; |
| 1274 | |
| 1275 | static int nfs_sync_scan1(struct mount *mp, struct vnode *vp, void *data); |
| 1276 | static int nfs_sync_scan2(struct mount *mp, struct vnode *vp, void *data); |
| 1277 | |
| 1278 | /* |
| 1279 | * Flush out the buffer cache |
| 1280 | */ |
| 1281 | /* ARGSUSED */ |
| 1282 | static int |
| 1283 | nfs_sync(struct mount *mp, int waitfor) |
| 1284 | { |
| 1285 | struct scaninfo scaninfo; |
| 1286 | int error; |
| 1287 | |
| 1288 | scaninfo.rescan = 1; |
| 1289 | scaninfo.waitfor = waitfor; |
| 1290 | scaninfo.allerror = 0; |
| 1291 | |
| 1292 | /* |
| 1293 | * Force stale buffer cache information to be flushed. |
| 1294 | */ |
| 1295 | error = 0; |
| 1296 | while (error == 0 && scaninfo.rescan) { |
| 1297 | scaninfo.rescan = 0; |
| 1298 | error = vmntvnodescan(mp, VMSC_GETVP, nfs_sync_scan1, |
| 1299 | nfs_sync_scan2, &scaninfo); |
| 1300 | } |
| 1301 | return(error); |
| 1302 | } |
| 1303 | |
| 1304 | static int |
| 1305 | nfs_sync_scan1(struct mount *mp, struct vnode *vp, void *data) |
| 1306 | { |
| 1307 | struct scaninfo *info = data; |
| 1308 | |
| 1309 | if (vn_islocked(vp) || RB_EMPTY(&vp->v_rbdirty_tree)) |
| 1310 | return(-1); |
| 1311 | if (info->waitfor == MNT_LAZY) |
| 1312 | return(-1); |
| 1313 | return(0); |
| 1314 | } |
| 1315 | |
| 1316 | static int |
| 1317 | nfs_sync_scan2(struct mount *mp, struct vnode *vp, void *data) |
| 1318 | { |
| 1319 | struct scaninfo *info = data; |
| 1320 | int error; |
| 1321 | |
| 1322 | error = VOP_FSYNC(vp, info->waitfor, 0); |
| 1323 | if (error) |
| 1324 | info->allerror = error; |
| 1325 | return(0); |
| 1326 | } |
| 1327 | |