| 1 | /* |
| 2 | * Copyright (c) 1989, 1993 |
| 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_syscalls.c 8.5 (Berkeley) 3/30/95 |
| 37 | * $FreeBSD: src/sys/nfs/nfs_syscalls.c,v 1.58.2.1 2000/11/26 02:30:06 dillon Exp $ |
| 38 | * $DragonFly: src/sys/vfs/nfs/nfs_syscalls.c,v 1.31 2008/01/05 14:02:41 swildner Exp $ |
| 39 | */ |
| 40 | |
| 41 | #include <sys/param.h> |
| 42 | #include <sys/systm.h> |
| 43 | #include <sys/sysproto.h> |
| 44 | #include <sys/kernel.h> |
| 45 | #include <sys/sysctl.h> |
| 46 | #include <sys/file.h> |
| 47 | #include <sys/filedesc.h> |
| 48 | #include <sys/vnode.h> |
| 49 | #include <sys/malloc.h> |
| 50 | #include <sys/mount.h> |
| 51 | #include <sys/proc.h> |
| 52 | #include <sys/priv.h> |
| 53 | #include <sys/buf.h> |
| 54 | #include <sys/mbuf.h> |
| 55 | #include <sys/resourcevar.h> |
| 56 | #include <sys/socket.h> |
| 57 | #include <sys/socketvar.h> |
| 58 | #include <sys/domain.h> |
| 59 | #include <sys/protosw.h> |
| 60 | #include <sys/nlookup.h> |
| 61 | #include <vm/vm_zone.h> |
| 62 | |
| 63 | #include <sys/mutex2.h> |
| 64 | #include <sys/thread2.h> |
| 65 | |
| 66 | #include <netinet/in.h> |
| 67 | #include <netinet/tcp.h> |
| 68 | #include "xdr_subs.h" |
| 69 | #include "rpcv2.h" |
| 70 | #include "nfsproto.h" |
| 71 | #include "nfs.h" |
| 72 | #include "nfsm_subs.h" |
| 73 | #include "nfsrvcache.h" |
| 74 | #include "nfsmount.h" |
| 75 | #include "nfsnode.h" |
| 76 | #include "nfsrtt.h" |
| 77 | |
| 78 | #include <sys/thread2.h> |
| 79 | |
| 80 | static MALLOC_DEFINE(M_NFSSVC, "NFS srvsock", "Nfs server structure"); |
| 81 | |
| 82 | static int nuidhash_max = NFS_MAXUIDHASH; |
| 83 | |
| 84 | #ifndef NFS_NOSERVER |
| 85 | static void nfsrv_zapsock (struct nfssvc_sock *slp); |
| 86 | #endif |
| 87 | |
| 88 | #define TRUE 1 |
| 89 | #define FALSE 0 |
| 90 | |
| 91 | SYSCTL_DECL(_vfs_nfs); |
| 92 | |
| 93 | #ifndef NFS_NOSERVER |
| 94 | int nfsd_waiting = 0; |
| 95 | static struct nfsdrt nfsdrt; |
| 96 | static int nfs_numnfsd = 0; |
| 97 | static void nfsd_rt (int sotype, struct nfsrv_descript *nd, |
| 98 | int cacherep); |
| 99 | static int nfssvc_addsock (struct file *, struct sockaddr *, |
| 100 | struct thread *); |
| 101 | static int nfssvc_nfsd (struct nfsd_srvargs *,caddr_t,struct thread *); |
| 102 | |
| 103 | static int nfs_privport = 0; |
| 104 | SYSCTL_INT(_vfs_nfs, NFS_NFSPRIVPORT, nfs_privport, CTLFLAG_RW, &nfs_privport, |
| 105 | 0, "Enable privileged source port checks"); |
| 106 | SYSCTL_INT(_vfs_nfs, OID_AUTO, gatherdelay, CTLFLAG_RW, &nfsrvw_procrastinate, 0, |
| 107 | "Enable NFS request procrastination"); |
| 108 | SYSCTL_INT(_vfs_nfs, OID_AUTO, gatherdelay_v3, CTLFLAG_RW, &nfsrvw_procrastinate_v3, 0, |
| 109 | "Enable NFSv3 request procrastination"); |
| 110 | int nfs_soreserve = NFS_MAXPACKET * NFS_MAXASYNCBIO; |
| 111 | SYSCTL_INT(_vfs_nfs, OID_AUTO, soreserve, CTLFLAG_RW, &nfs_soreserve, 0, |
| 112 | "Minimum NFS socket buffer size reservation"); |
| 113 | |
| 114 | /* |
| 115 | * NFS server system calls |
| 116 | */ |
| 117 | |
| 118 | #endif /* NFS_NOSERVER */ |
| 119 | /* |
| 120 | * nfssvc_args(int flag, caddr_t argp) |
| 121 | * |
| 122 | * Nfs server psuedo system call for the nfsd's |
| 123 | * Based on the flag value it either: |
| 124 | * - adds a socket to the selection list |
| 125 | * - remains in the kernel as an nfsd |
| 126 | * - remains in the kernel as an nfsiod |
| 127 | * |
| 128 | * MPALMOSTSAFE |
| 129 | */ |
| 130 | int |
| 131 | sys_nfssvc(struct nfssvc_args *uap) |
| 132 | { |
| 133 | #ifndef NFS_NOSERVER |
| 134 | struct nlookupdata nd; |
| 135 | struct file *fp; |
| 136 | struct sockaddr *nam; |
| 137 | struct nfsd_args nfsdarg; |
| 138 | struct nfsd_srvargs nfsd_srvargs, *nsd = &nfsd_srvargs; |
| 139 | struct nfsd_cargs ncd; |
| 140 | struct nfsd *nfsd; |
| 141 | struct nfssvc_sock *slp; |
| 142 | struct nfsuid *nuidp; |
| 143 | struct nfsmount *nmp; |
| 144 | struct vnode *vp; |
| 145 | #endif /* NFS_NOSERVER */ |
| 146 | int error; |
| 147 | struct thread *td = curthread; |
| 148 | |
| 149 | /* |
| 150 | * Must be super user |
| 151 | */ |
| 152 | error = priv_check(td, PRIV_ROOT); |
| 153 | if (error) |
| 154 | return (error); |
| 155 | |
| 156 | lwkt_gettoken(&nfs_token); |
| 157 | |
| 158 | while (nfssvc_sockhead_flag & SLP_INIT) { |
| 159 | nfssvc_sockhead_flag |= SLP_WANTINIT; |
| 160 | tsleep((caddr_t)&nfssvc_sockhead, 0, "nfsd init", 0); |
| 161 | } |
| 162 | if (uap->flag & NFSSVC_BIOD) |
| 163 | error = ENXIO; /* no longer need nfsiod's */ |
| 164 | #ifdef NFS_NOSERVER |
| 165 | else |
| 166 | error = ENXIO; |
| 167 | #else /* !NFS_NOSERVER */ |
| 168 | else if (uap->flag & NFSSVC_MNTD) { |
| 169 | error = copyin(uap->argp, (caddr_t)&ncd, sizeof (ncd)); |
| 170 | if (error) |
| 171 | goto done; |
| 172 | vp = NULL; |
| 173 | error = nlookup_init(&nd, ncd.ncd_dirp, UIO_USERSPACE, |
| 174 | NLC_FOLLOW); |
| 175 | if (error == 0) |
| 176 | error = nlookup(&nd); |
| 177 | if (error == 0) |
| 178 | error = cache_vget(&nd.nl_nch, nd.nl_cred, LK_EXCLUSIVE, &vp); |
| 179 | nlookup_done(&nd); |
| 180 | if (error) |
| 181 | goto done; |
| 182 | |
| 183 | if ((vp->v_flag & VROOT) == 0) |
| 184 | error = EINVAL; |
| 185 | nmp = VFSTONFS(vp->v_mount); |
| 186 | vput(vp); |
| 187 | if (error) |
| 188 | goto done; |
| 189 | if ((nmp->nm_state & NFSSTA_MNTD) && |
| 190 | (uap->flag & NFSSVC_GOTAUTH) == 0) { |
| 191 | error = 0; |
| 192 | goto done; |
| 193 | } |
| 194 | nmp->nm_state |= NFSSTA_MNTD; |
| 195 | error = nfs_clientd(nmp, td->td_ucred, &ncd, uap->flag, |
| 196 | uap->argp, td); |
| 197 | } else if (uap->flag & NFSSVC_ADDSOCK) { |
| 198 | error = copyin(uap->argp, (caddr_t)&nfsdarg, sizeof(nfsdarg)); |
| 199 | if (error) |
| 200 | goto done; |
| 201 | error = holdsock(td->td_proc->p_fd, nfsdarg.sock, &fp); |
| 202 | if (error) |
| 203 | goto done; |
| 204 | /* |
| 205 | * Get the client address for connected sockets. |
| 206 | */ |
| 207 | if (nfsdarg.name == NULL || nfsdarg.namelen == 0) |
| 208 | nam = NULL; |
| 209 | else { |
| 210 | error = getsockaddr(&nam, nfsdarg.name, |
| 211 | nfsdarg.namelen); |
| 212 | if (error) { |
| 213 | fdrop(fp); |
| 214 | goto done; |
| 215 | } |
| 216 | } |
| 217 | error = nfssvc_addsock(fp, nam, td); |
| 218 | fdrop(fp); |
| 219 | } else { |
| 220 | error = copyin(uap->argp, (caddr_t)nsd, sizeof (*nsd)); |
| 221 | if (error) |
| 222 | goto done; |
| 223 | if ((uap->flag & NFSSVC_AUTHIN) && |
| 224 | ((nfsd = nsd->nsd_nfsd)) != NULL && |
| 225 | (nfsd->nfsd_slp->ns_flag & SLP_VALID)) { |
| 226 | slp = nfsd->nfsd_slp; |
| 227 | |
| 228 | /* |
| 229 | * First check to see if another nfsd has already |
| 230 | * added this credential. |
| 231 | */ |
| 232 | for (nuidp = NUIDHASH(slp,nsd->nsd_cr.cr_uid)->lh_first; |
| 233 | nuidp != 0; nuidp = nuidp->nu_hash.le_next) { |
| 234 | if (nuidp->nu_cr.cr_uid == nsd->nsd_cr.cr_uid && |
| 235 | (!nfsd->nfsd_nd->nd_nam2 || |
| 236 | netaddr_match(NU_NETFAM(nuidp), |
| 237 | &nuidp->nu_haddr, nfsd->nfsd_nd->nd_nam2))) |
| 238 | break; |
| 239 | } |
| 240 | if (nuidp) { |
| 241 | nfsrv_setcred(&nuidp->nu_cr,&nfsd->nfsd_nd->nd_cr); |
| 242 | nfsd->nfsd_nd->nd_flag |= ND_KERBFULL; |
| 243 | } else { |
| 244 | /* |
| 245 | * Nope, so we will. |
| 246 | */ |
| 247 | if (slp->ns_numuids < nuidhash_max) { |
| 248 | slp->ns_numuids++; |
| 249 | nuidp = (struct nfsuid *) |
| 250 | kmalloc(sizeof (struct nfsuid), M_NFSUID, |
| 251 | M_WAITOK); |
| 252 | } else |
| 253 | nuidp = NULL; |
| 254 | if ((slp->ns_flag & SLP_VALID) == 0) { |
| 255 | if (nuidp) |
| 256 | kfree((caddr_t)nuidp, M_NFSUID); |
| 257 | } else { |
| 258 | if (nuidp == NULL) { |
| 259 | nuidp = TAILQ_FIRST(&slp->ns_uidlruhead); |
| 260 | LIST_REMOVE(nuidp, nu_hash); |
| 261 | TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, |
| 262 | nu_lru); |
| 263 | if (nuidp->nu_flag & NU_NAM) |
| 264 | FREE(nuidp->nu_nam, M_SONAME); |
| 265 | } |
| 266 | nuidp->nu_flag = 0; |
| 267 | nuidp->nu_cr = nsd->nsd_cr; |
| 268 | if (nuidp->nu_cr.cr_ngroups > NGROUPS) |
| 269 | nuidp->nu_cr.cr_ngroups = NGROUPS; |
| 270 | nuidp->nu_cr.cr_ref = 1; |
| 271 | nuidp->nu_timestamp = nsd->nsd_timestamp; |
| 272 | nuidp->nu_expire = time_second + nsd->nsd_ttl; |
| 273 | /* |
| 274 | * and save the session key in nu_key. |
| 275 | */ |
| 276 | bcopy(nsd->nsd_key, nuidp->nu_key, |
| 277 | sizeof (nsd->nsd_key)); |
| 278 | if (nfsd->nfsd_nd->nd_nam2) { |
| 279 | struct sockaddr_in *saddr; |
| 280 | |
| 281 | saddr = (struct sockaddr_in *) |
| 282 | nfsd->nfsd_nd->nd_nam2; |
| 283 | switch (saddr->sin_family) { |
| 284 | case AF_INET: |
| 285 | nuidp->nu_flag |= NU_INETADDR; |
| 286 | nuidp->nu_inetaddr = |
| 287 | saddr->sin_addr.s_addr; |
| 288 | break; |
| 289 | case AF_ISO: |
| 290 | default: |
| 291 | nuidp->nu_flag |= NU_NAM; |
| 292 | nuidp->nu_nam = |
| 293 | dup_sockaddr(nfsd->nfsd_nd->nd_nam2); |
| 294 | break; |
| 295 | }; |
| 296 | } |
| 297 | TAILQ_INSERT_TAIL(&slp->ns_uidlruhead, nuidp, |
| 298 | nu_lru); |
| 299 | LIST_INSERT_HEAD(NUIDHASH(slp, nsd->nsd_uid), |
| 300 | nuidp, nu_hash); |
| 301 | nfsrv_setcred(&nuidp->nu_cr, |
| 302 | &nfsd->nfsd_nd->nd_cr); |
| 303 | nfsd->nfsd_nd->nd_flag |= ND_KERBFULL; |
| 304 | } |
| 305 | } |
| 306 | } |
| 307 | if ((uap->flag & NFSSVC_AUTHINFAIL) && (nfsd = nsd->nsd_nfsd)) |
| 308 | nfsd->nfsd_flag |= NFSD_AUTHFAIL; |
| 309 | error = nfssvc_nfsd(nsd, uap->argp, td); |
| 310 | } |
| 311 | #endif /* NFS_NOSERVER */ |
| 312 | if (error == EINTR || error == ERESTART) |
| 313 | error = 0; |
| 314 | done: |
| 315 | lwkt_reltoken(&nfs_token); |
| 316 | return (error); |
| 317 | } |
| 318 | |
| 319 | #ifndef NFS_NOSERVER |
| 320 | /* |
| 321 | * Adds a socket to the list for servicing by nfsds. |
| 322 | */ |
| 323 | static int |
| 324 | nfssvc_addsock(struct file *fp, struct sockaddr *mynam, struct thread *td) |
| 325 | { |
| 326 | int siz; |
| 327 | struct nfssvc_sock *slp; |
| 328 | struct socket *so; |
| 329 | int error; |
| 330 | |
| 331 | so = (struct socket *)fp->f_data; |
| 332 | #if 0 |
| 333 | tslp = NULL; |
| 334 | /* |
| 335 | * Add it to the list, as required. |
| 336 | */ |
| 337 | if (so->so_proto->pr_protocol == IPPROTO_UDP) { |
| 338 | tslp = nfs_udpsock; |
| 339 | if (tslp->ns_flag & SLP_VALID) { |
| 340 | if (mynam != NULL) |
| 341 | FREE(mynam, M_SONAME); |
| 342 | return (EPERM); |
| 343 | } |
| 344 | } |
| 345 | #endif |
| 346 | /* |
| 347 | * Reserve buffer space in the socket. Note that due to bugs in |
| 348 | * Linux's delayed-ack code, serious performance degredation may |
| 349 | * occur with linux hosts if the minimum is used. |
| 350 | * |
| 351 | * NFS sockets are not limited to the standard sb_max or by |
| 352 | * resource limits. |
| 353 | */ |
| 354 | if (so->so_type == SOCK_STREAM) |
| 355 | siz = NFS_MAXPACKET + sizeof (u_long); |
| 356 | else |
| 357 | siz = NFS_MAXPACKET; |
| 358 | if (siz < nfs_soreserve) |
| 359 | siz = nfs_soreserve; |
| 360 | |
| 361 | error = soreserve(so, siz, siz, NULL); |
| 362 | if (error) { |
| 363 | if (mynam != NULL) |
| 364 | FREE(mynam, M_SONAME); |
| 365 | return (error); |
| 366 | } |
| 367 | |
| 368 | /* |
| 369 | * Set protocol specific options { for now TCP only } and |
| 370 | * reserve some space. For datagram sockets, this can get called |
| 371 | * repeatedly for the same socket, but that isn't harmful. |
| 372 | */ |
| 373 | if (so->so_type == SOCK_STREAM) { |
| 374 | struct sockopt sopt; |
| 375 | int val; |
| 376 | |
| 377 | bzero(&sopt, sizeof sopt); |
| 378 | sopt.sopt_level = SOL_SOCKET; |
| 379 | sopt.sopt_name = SO_KEEPALIVE; |
| 380 | sopt.sopt_val = &val; |
| 381 | sopt.sopt_valsize = sizeof val; |
| 382 | val = 1; |
| 383 | sosetopt(so, &sopt); |
| 384 | } |
| 385 | if (so->so_proto->pr_domain->dom_family == AF_INET && |
| 386 | so->so_proto->pr_protocol == IPPROTO_TCP) { |
| 387 | struct sockopt sopt; |
| 388 | int val; |
| 389 | |
| 390 | bzero(&sopt, sizeof sopt); |
| 391 | sopt.sopt_level = IPPROTO_TCP; |
| 392 | sopt.sopt_name = TCP_NODELAY; |
| 393 | sopt.sopt_val = &val; |
| 394 | sopt.sopt_valsize = sizeof val; |
| 395 | val = 1; |
| 396 | sosetopt(so, &sopt); |
| 397 | |
| 398 | bzero(&sopt, sizeof sopt); |
| 399 | sopt.sopt_level = IPPROTO_TCP; |
| 400 | sopt.sopt_name = TCP_FASTKEEP; |
| 401 | sopt.sopt_val = &val; |
| 402 | sopt.sopt_valsize = sizeof val; |
| 403 | val = 1; |
| 404 | sosetopt(so, &sopt); |
| 405 | } |
| 406 | atomic_clear_int(&so->so_rcv.ssb_flags, SSB_NOINTR); |
| 407 | so->so_rcv.ssb_timeo = 0; |
| 408 | atomic_clear_int(&so->so_snd.ssb_flags, SSB_NOINTR); |
| 409 | so->so_snd.ssb_timeo = 0; |
| 410 | |
| 411 | slp = kmalloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK | M_ZERO); |
| 412 | mtx_init(&slp->ns_solock); |
| 413 | STAILQ_INIT(&slp->ns_rec); |
| 414 | TAILQ_INIT(&slp->ns_uidlruhead); |
| 415 | lwkt_token_init(&slp->ns_token, 1, "nfssrv_token"); |
| 416 | |
| 417 | lwkt_gettoken(&nfs_token); |
| 418 | nfsrv_slpref(slp); |
| 419 | TAILQ_INSERT_TAIL(&nfssvc_sockhead, slp, ns_chain); |
| 420 | lwkt_gettoken(&slp->ns_token); |
| 421 | |
| 422 | slp->ns_so = so; |
| 423 | slp->ns_nam = mynam; |
| 424 | fp->f_count++; |
| 425 | slp->ns_fp = fp; |
| 426 | |
| 427 | so->so_upcallarg = (caddr_t)slp; |
| 428 | so->so_upcall = nfsrv_rcv_upcall; |
| 429 | atomic_set_int(&so->so_rcv.ssb_flags, SSB_UPCALL); |
| 430 | slp->ns_flag = (SLP_VALID | SLP_NEEDQ); |
| 431 | nfsrv_wakenfsd(slp, 1); |
| 432 | |
| 433 | lwkt_reltoken(&slp->ns_token); |
| 434 | lwkt_reltoken(&nfs_token); |
| 435 | |
| 436 | return (0); |
| 437 | } |
| 438 | |
| 439 | /* |
| 440 | * Called by nfssvc() for nfsds. Just loops around servicing rpc requests |
| 441 | * until it is killed by a signal. |
| 442 | */ |
| 443 | static int |
| 444 | nfssvc_nfsd(struct nfsd_srvargs *nsd, caddr_t argp, struct thread *td) |
| 445 | { |
| 446 | int siz; |
| 447 | struct nfssvc_sock *slp; |
| 448 | struct nfsd *nfsd = nsd->nsd_nfsd; |
| 449 | struct nfsrv_descript *nd = NULL; |
| 450 | struct mbuf *m, *mreq; |
| 451 | int error, cacherep, sotype, writes_todo; |
| 452 | int procrastinate; |
| 453 | u_quad_t cur_usec; |
| 454 | |
| 455 | #ifndef nolint |
| 456 | cacherep = RC_DOIT; |
| 457 | writes_todo = 0; |
| 458 | #endif |
| 459 | lwkt_gettoken(&nfs_token); |
| 460 | |
| 461 | if (nfsd == NULL) { |
| 462 | nsd->nsd_nfsd = nfsd = (struct nfsd *) |
| 463 | kmalloc(sizeof (struct nfsd), M_NFSD, M_WAITOK|M_ZERO); |
| 464 | nfsd->nfsd_td = td; |
| 465 | TAILQ_INSERT_TAIL(&nfsd_head, nfsd, nfsd_chain); |
| 466 | nfs_numnfsd++; |
| 467 | } |
| 468 | |
| 469 | /* |
| 470 | * Loop getting rpc requests until SIGKILL. |
| 471 | */ |
| 472 | for (;;) { |
| 473 | if ((nfsd->nfsd_flag & NFSD_REQINPROG) == 0) { |
| 474 | while (nfsd->nfsd_slp == NULL && |
| 475 | (nfsd_head_flag & NFSD_CHECKSLP) == 0) { |
| 476 | nfsd->nfsd_flag |= NFSD_WAITING; |
| 477 | nfsd_waiting++; |
| 478 | error = tsleep(nfsd, PCATCH, "nfsd", 0); |
| 479 | nfsd_waiting--; |
| 480 | if (error && nfsd->nfsd_slp == NULL) |
| 481 | goto done; |
| 482 | } |
| 483 | if (nfsd->nfsd_slp == NULL && |
| 484 | (nfsd_head_flag & NFSD_CHECKSLP)) { |
| 485 | TAILQ_FOREACH(slp, &nfssvc_sockhead, ns_chain) { |
| 486 | if ((slp->ns_flag & SLP_ACTION_MASK) || |
| 487 | slp->ns_needq_upcall) { |
| 488 | nfsrv_slpref(slp); |
| 489 | nfsd->nfsd_slp = slp; |
| 490 | break; |
| 491 | } |
| 492 | } |
| 493 | if (slp == NULL) |
| 494 | nfsd_head_flag &= ~NFSD_CHECKSLP; |
| 495 | } |
| 496 | if ((slp = nfsd->nfsd_slp) == NULL) |
| 497 | continue; |
| 498 | |
| 499 | lwkt_reltoken(&nfs_token); |
| 500 | lwkt_gettoken(&slp->ns_token); |
| 501 | |
| 502 | if (slp->ns_needq_upcall) { |
| 503 | slp->ns_needq_upcall = 0; |
| 504 | slp->ns_flag |= SLP_NEEDQ; |
| 505 | } |
| 506 | |
| 507 | if (slp->ns_flag & SLP_VALID) { |
| 508 | /* |
| 509 | * We can both process additional received |
| 510 | * data into new records and process existing |
| 511 | * records. This keeps the pipeline hot by |
| 512 | * allowing the tcp socket to continue to |
| 513 | * drain while we are processing records. |
| 514 | */ |
| 515 | if (slp->ns_flag & SLP_DISCONN) { |
| 516 | nfsrv_zapsock(slp); |
| 517 | } else if (slp->ns_flag & SLP_NEEDQ) { |
| 518 | (void)nfs_slplock(slp, 1); |
| 519 | nfsrv_rcv(slp->ns_so, (caddr_t)slp, |
| 520 | MB_WAIT); |
| 521 | nfs_slpunlock(slp); |
| 522 | } |
| 523 | error = nfsrv_dorec(slp, nfsd, &nd); |
| 524 | cur_usec = nfs_curusec(); |
| 525 | if (error && slp->ns_tq.lh_first && |
| 526 | slp->ns_tq.lh_first->nd_time <= cur_usec) { |
| 527 | error = 0; |
| 528 | cacherep = RC_DOIT; |
| 529 | writes_todo = 1; |
| 530 | } else { |
| 531 | writes_todo = 0; |
| 532 | } |
| 533 | nfsd->nfsd_flag |= NFSD_REQINPROG; |
| 534 | } else { |
| 535 | slp->ns_flag &= ~SLP_ACTION_MASK; |
| 536 | error = 0; |
| 537 | } |
| 538 | } else { |
| 539 | error = 0; |
| 540 | slp = nfsd->nfsd_slp; |
| 541 | |
| 542 | lwkt_reltoken(&nfs_token); |
| 543 | lwkt_gettoken(&slp->ns_token); |
| 544 | |
| 545 | if (slp->ns_needq_upcall) { |
| 546 | slp->ns_needq_upcall = 0; |
| 547 | slp->ns_flag |= SLP_NEEDQ; |
| 548 | } |
| 549 | if (NFSRV_RECLIMIT(slp) == 0 && |
| 550 | (slp->ns_flag & SLP_NEEDQ)) { |
| 551 | (void)nfs_slplock(slp, 1); |
| 552 | nfsrv_rcv(slp->ns_so, (caddr_t)slp, |
| 553 | MB_WAIT); |
| 554 | nfs_slpunlock(slp); |
| 555 | } |
| 556 | } |
| 557 | |
| 558 | /* |
| 559 | * nfs_token not held here. slp token is held. |
| 560 | */ |
| 561 | if (error || (slp->ns_flag & SLP_VALID) == 0) { |
| 562 | if (nd) { |
| 563 | kfree((caddr_t)nd, M_NFSRVDESC); |
| 564 | nd = NULL; |
| 565 | } |
| 566 | nfsd->nfsd_flag &= ~NFSD_REQINPROG; |
| 567 | if (slp->ns_flag & SLP_ACTION_MASK) { |
| 568 | lwkt_reltoken(&slp->ns_token); |
| 569 | lwkt_gettoken(&nfs_token); |
| 570 | } else { |
| 571 | nfsd->nfsd_slp = NULL; |
| 572 | lwkt_reltoken(&slp->ns_token); |
| 573 | lwkt_gettoken(&nfs_token); |
| 574 | nfsrv_slpderef(slp); |
| 575 | } |
| 576 | continue; |
| 577 | } |
| 578 | |
| 579 | /* |
| 580 | * Execute the NFS request - handle the server side cache |
| 581 | * |
| 582 | * nfs_token not held here. slp token is held. |
| 583 | */ |
| 584 | sotype = slp->ns_so->so_type; |
| 585 | if (nd) { |
| 586 | getmicrotime(&nd->nd_starttime); |
| 587 | if (nd->nd_nam2) |
| 588 | nd->nd_nam = nd->nd_nam2; |
| 589 | else |
| 590 | nd->nd_nam = slp->ns_nam; |
| 591 | |
| 592 | /* |
| 593 | * Check to see if authorization is needed. |
| 594 | */ |
| 595 | if (nfsd->nfsd_flag & NFSD_NEEDAUTH) { |
| 596 | nfsd->nfsd_flag &= ~NFSD_NEEDAUTH; |
| 597 | nsd->nsd_haddr = |
| 598 | ((struct sockaddr_in *) |
| 599 | nd->nd_nam)->sin_addr.s_addr; |
| 600 | nsd->nsd_authlen = nfsd->nfsd_authlen; |
| 601 | nsd->nsd_verflen = nfsd->nfsd_verflen; |
| 602 | if (!copyout(nfsd->nfsd_authstr,nsd->nsd_authstr, |
| 603 | nfsd->nfsd_authlen) && |
| 604 | !copyout(nfsd->nfsd_verfstr, nsd->nsd_verfstr, |
| 605 | nfsd->nfsd_verflen) && |
| 606 | !copyout((caddr_t)nsd, argp, sizeof (*nsd))) |
| 607 | lwkt_reltoken(&slp->ns_token); |
| 608 | return (ENEEDAUTH); |
| 609 | cacherep = RC_DROPIT; |
| 610 | } else { |
| 611 | cacherep = nfsrv_getcache(nd, slp, &mreq); |
| 612 | } |
| 613 | |
| 614 | if (nfsd->nfsd_flag & NFSD_AUTHFAIL) { |
| 615 | nfsd->nfsd_flag &= ~NFSD_AUTHFAIL; |
| 616 | nd->nd_procnum = NFSPROC_NOOP; |
| 617 | nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK); |
| 618 | cacherep = RC_DOIT; |
| 619 | } else if (nfs_privport) { |
| 620 | /* Check if source port is privileged */ |
| 621 | u_short port; |
| 622 | struct sockaddr *nam = nd->nd_nam; |
| 623 | struct sockaddr_in *sin; |
| 624 | |
| 625 | sin = (struct sockaddr_in *)nam; |
| 626 | port = ntohs(sin->sin_port); |
| 627 | if (port >= IPPORT_RESERVED && |
| 628 | nd->nd_procnum != NFSPROC_NULL) { |
| 629 | nd->nd_procnum = NFSPROC_NOOP; |
| 630 | nd->nd_repstat = (NFSERR_AUTHERR | AUTH_TOOWEAK); |
| 631 | cacherep = RC_DOIT; |
| 632 | kprintf("NFS request from unprivileged port (%s:%d)\n", |
| 633 | inet_ntoa(sin->sin_addr), port); |
| 634 | } |
| 635 | } |
| 636 | |
| 637 | } |
| 638 | |
| 639 | /* |
| 640 | * Execute the NFS request - direct execution |
| 641 | * |
| 642 | * Loop to get all the write rpc replies that have been |
| 643 | * gathered together. |
| 644 | * |
| 645 | * nfs_token not held here. slp token is held. |
| 646 | */ |
| 647 | do { |
| 648 | switch (cacherep) { |
| 649 | case RC_DOIT: |
| 650 | if (nd && (nd->nd_flag & ND_NFSV3)) |
| 651 | procrastinate = nfsrvw_procrastinate_v3; |
| 652 | else |
| 653 | procrastinate = nfsrvw_procrastinate; |
| 654 | if (writes_todo || (nd->nd_procnum == NFSPROC_WRITE && |
| 655 | procrastinate > 0) |
| 656 | ) { |
| 657 | error = nfsrv_writegather(&nd, slp, |
| 658 | nfsd->nfsd_td, &mreq); |
| 659 | } else { |
| 660 | /* NOT YET lwkt_reltoken(&slp->ns_token); */ |
| 661 | error = (*(nfsrv3_procs[nd->nd_procnum]))(nd, |
| 662 | slp, nfsd->nfsd_td, &mreq); |
| 663 | /* NOT YET lwkt_gettoken(&slp->ns_token); */ |
| 664 | } |
| 665 | if (mreq == NULL) |
| 666 | break; |
| 667 | if (error != 0 && error != NFSERR_RETVOID) { |
| 668 | if (nd->nd_procnum != NQNFSPROC_VACATED) |
| 669 | nfsstats.srv_errs++; |
| 670 | nfsrv_updatecache(nd, FALSE, mreq); |
| 671 | if (nd->nd_nam2) |
| 672 | FREE(nd->nd_nam2, M_SONAME); |
| 673 | break; |
| 674 | } |
| 675 | nfsstats.srvrpccnt[nd->nd_procnum]++; |
| 676 | nfsrv_updatecache(nd, TRUE, mreq); |
| 677 | nd->nd_mrep = NULL; |
| 678 | /* FALL THROUGH */ |
| 679 | case RC_REPLY: |
| 680 | m = mreq; |
| 681 | siz = 0; |
| 682 | while (m) { |
| 683 | siz += m->m_len; |
| 684 | m = m->m_next; |
| 685 | } |
| 686 | if (siz <= 0 || siz > NFS_MAXPACKET) { |
| 687 | kprintf("mbuf siz=%d\n",siz); |
| 688 | panic("Bad nfs svc reply"); |
| 689 | } |
| 690 | m = mreq; |
| 691 | m->m_pkthdr.len = siz; |
| 692 | m->m_pkthdr.rcvif = NULL; |
| 693 | /* |
| 694 | * For stream protocols, prepend a Sun RPC |
| 695 | * Record Mark. |
| 696 | */ |
| 697 | if (sotype == SOCK_STREAM) { |
| 698 | M_PREPEND(m, NFSX_UNSIGNED, MB_WAIT); |
| 699 | if (m == NULL) { |
| 700 | error = ENOBUFS; |
| 701 | goto skip; |
| 702 | } |
| 703 | *mtod(m, u_int32_t *) = htonl(0x80000000 | siz); |
| 704 | } |
| 705 | if (slp->ns_so->so_proto->pr_flags & PR_CONNREQUIRED) |
| 706 | (void) nfs_slplock(slp, 1); |
| 707 | if (slp->ns_flag & SLP_VALID) |
| 708 | error = nfs_send(slp->ns_so, nd->nd_nam2, m, NULL); |
| 709 | else { |
| 710 | error = EPIPE; |
| 711 | m_freem(m); |
| 712 | } |
| 713 | skip: |
| 714 | if (nfsrtton) |
| 715 | nfsd_rt(sotype, nd, cacherep); |
| 716 | if (nd->nd_nam2) |
| 717 | FREE(nd->nd_nam2, M_SONAME); |
| 718 | if (nd->nd_mrep) |
| 719 | m_freem(nd->nd_mrep); |
| 720 | if (error == EPIPE || error == ENOBUFS) |
| 721 | nfsrv_zapsock(slp); |
| 722 | if (slp->ns_so->so_proto->pr_flags & PR_CONNREQUIRED) |
| 723 | nfs_slpunlock(slp); |
| 724 | if (error == EINTR || error == ERESTART) { |
| 725 | kfree((caddr_t)nd, M_NFSRVDESC); |
| 726 | lwkt_reltoken(&slp->ns_token); |
| 727 | lwkt_gettoken(&nfs_token); |
| 728 | nfsd->nfsd_slp = NULL; |
| 729 | nfsrv_slpderef(slp); |
| 730 | goto done; |
| 731 | } |
| 732 | break; |
| 733 | case RC_DROPIT: |
| 734 | if (nfsrtton) |
| 735 | nfsd_rt(sotype, nd, cacherep); |
| 736 | m_freem(nd->nd_mrep); |
| 737 | if (nd->nd_nam2) |
| 738 | FREE(nd->nd_nam2, M_SONAME); |
| 739 | break; |
| 740 | }; |
| 741 | if (nd) { |
| 742 | FREE((caddr_t)nd, M_NFSRVDESC); |
| 743 | nd = NULL; |
| 744 | } |
| 745 | |
| 746 | /* |
| 747 | * Check to see if there are outstanding writes that |
| 748 | * need to be serviced. |
| 749 | */ |
| 750 | cur_usec = nfs_curusec(); |
| 751 | if (slp->ns_tq.lh_first && |
| 752 | slp->ns_tq.lh_first->nd_time <= cur_usec) { |
| 753 | cacherep = RC_DOIT; |
| 754 | writes_todo = 1; |
| 755 | } else { |
| 756 | writes_todo = 0; |
| 757 | } |
| 758 | } while (writes_todo); |
| 759 | |
| 760 | /* |
| 761 | * nfs_token not held here. slp token is held. |
| 762 | */ |
| 763 | if (nfsrv_dorec(slp, nfsd, &nd)) { |
| 764 | nfsd->nfsd_flag &= ~NFSD_REQINPROG; |
| 765 | if (slp->ns_flag & SLP_ACTION_MASK) { |
| 766 | lwkt_reltoken(&slp->ns_token); |
| 767 | lwkt_gettoken(&nfs_token); |
| 768 | } else { |
| 769 | nfsd->nfsd_slp = NULL; |
| 770 | lwkt_reltoken(&slp->ns_token); |
| 771 | lwkt_gettoken(&nfs_token); |
| 772 | nfsrv_slpderef(slp); |
| 773 | } |
| 774 | } else { |
| 775 | lwkt_reltoken(&slp->ns_token); |
| 776 | lwkt_gettoken(&nfs_token); |
| 777 | } |
| 778 | } |
| 779 | done: |
| 780 | TAILQ_REMOVE(&nfsd_head, nfsd, nfsd_chain); |
| 781 | kfree((caddr_t)nfsd, M_NFSD); |
| 782 | nsd->nsd_nfsd = NULL; |
| 783 | if (--nfs_numnfsd == 0) |
| 784 | nfsrv_init(TRUE); /* Reinitialize everything */ |
| 785 | |
| 786 | lwkt_reltoken(&nfs_token); |
| 787 | return (error); |
| 788 | } |
| 789 | |
| 790 | /* |
| 791 | * Shut down a socket associated with an nfssvc_sock structure. |
| 792 | * Should be called with the send lock set, if required. |
| 793 | * The trick here is to increment the sref at the start, so that the nfsds |
| 794 | * will stop using it and clear ns_flag at the end so that it will not be |
| 795 | * reassigned during cleanup. |
| 796 | */ |
| 797 | static void |
| 798 | nfsrv_zapsock(struct nfssvc_sock *slp) |
| 799 | { |
| 800 | struct nfsuid *nuidp, *nnuidp; |
| 801 | struct nfsrv_descript *nwp, *nnwp; |
| 802 | struct socket *so; |
| 803 | struct file *fp; |
| 804 | struct nfsrv_rec *rec; |
| 805 | |
| 806 | slp->ns_flag &= ~SLP_ALLFLAGS; |
| 807 | fp = slp->ns_fp; |
| 808 | if (fp) { |
| 809 | slp->ns_fp = NULL; |
| 810 | so = slp->ns_so; |
| 811 | atomic_clear_int(&so->so_rcv.ssb_flags, SSB_UPCALL); |
| 812 | so->so_upcall = NULL; |
| 813 | so->so_upcallarg = NULL; |
| 814 | soshutdown(so, SHUT_RDWR); |
| 815 | closef(fp, NULL); |
| 816 | if (slp->ns_nam) |
| 817 | FREE(slp->ns_nam, M_SONAME); |
| 818 | m_freem(slp->ns_raw); |
| 819 | while ((rec = STAILQ_FIRST(&slp->ns_rec)) != NULL) { |
| 820 | --slp->ns_numrec; |
| 821 | STAILQ_REMOVE_HEAD(&slp->ns_rec, nr_link); |
| 822 | if (rec->nr_address) |
| 823 | FREE(rec->nr_address, M_SONAME); |
| 824 | m_freem(rec->nr_packet); |
| 825 | kfree(rec, M_NFSRVDESC); |
| 826 | } |
| 827 | KKASSERT(slp->ns_numrec == 0); |
| 828 | |
| 829 | TAILQ_FOREACH_MUTABLE(nuidp, &slp->ns_uidlruhead, nu_lru, |
| 830 | nnuidp) { |
| 831 | LIST_REMOVE(nuidp, nu_hash); |
| 832 | TAILQ_REMOVE(&slp->ns_uidlruhead, nuidp, nu_lru); |
| 833 | if (nuidp->nu_flag & NU_NAM) |
| 834 | FREE(nuidp->nu_nam, M_SONAME); |
| 835 | kfree((caddr_t)nuidp, M_NFSUID); |
| 836 | } |
| 837 | crit_enter(); |
| 838 | for (nwp = slp->ns_tq.lh_first; nwp; nwp = nnwp) { |
| 839 | nnwp = nwp->nd_tq.le_next; |
| 840 | LIST_REMOVE(nwp, nd_tq); |
| 841 | kfree((caddr_t)nwp, M_NFSRVDESC); |
| 842 | } |
| 843 | LIST_INIT(&slp->ns_tq); |
| 844 | crit_exit(); |
| 845 | nfsrv_slpderef(slp); |
| 846 | } |
| 847 | } |
| 848 | |
| 849 | /* |
| 850 | * Derefence a server socket structure. If it has no more references and |
| 851 | * is no longer valid, you can throw it away. |
| 852 | * |
| 853 | * Must be holding nfs_token! |
| 854 | */ |
| 855 | void |
| 856 | nfsrv_slpderef(struct nfssvc_sock *slp) |
| 857 | { |
| 858 | ASSERT_LWKT_TOKEN_HELD(&nfs_token); |
| 859 | if (slp->ns_sref == 1) { |
| 860 | KKASSERT((slp->ns_flag & SLP_VALID) == 0); |
| 861 | TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain); |
| 862 | slp->ns_sref = 0; |
| 863 | kfree((caddr_t)slp, M_NFSSVC); |
| 864 | } else { |
| 865 | --slp->ns_sref; |
| 866 | } |
| 867 | } |
| 868 | |
| 869 | void |
| 870 | nfsrv_slpref(struct nfssvc_sock *slp) |
| 871 | { |
| 872 | ASSERT_LWKT_TOKEN_HELD(&nfs_token); |
| 873 | ++slp->ns_sref; |
| 874 | } |
| 875 | |
| 876 | /* |
| 877 | * Lock a socket against others. |
| 878 | * |
| 879 | * Returns 0 on failure, 1 on success. |
| 880 | */ |
| 881 | int |
| 882 | nfs_slplock(struct nfssvc_sock *slp, int wait) |
| 883 | { |
| 884 | mtx_t mtx = &slp->ns_solock; |
| 885 | |
| 886 | if (wait) { |
| 887 | mtx_lock_ex(mtx, "nfsslplck", 0, 0); |
| 888 | return(1); |
| 889 | } else if (mtx_lock_ex_try(mtx) == 0) { |
| 890 | return(1); |
| 891 | } else { |
| 892 | return(0); |
| 893 | } |
| 894 | } |
| 895 | |
| 896 | /* |
| 897 | * Unlock the stream socket for others. |
| 898 | */ |
| 899 | void |
| 900 | nfs_slpunlock(struct nfssvc_sock *slp) |
| 901 | { |
| 902 | mtx_t mtx = &slp->ns_solock; |
| 903 | |
| 904 | mtx_unlock(mtx); |
| 905 | } |
| 906 | |
| 907 | /* |
| 908 | * Initialize the data structures for the server. |
| 909 | * Handshake with any new nfsds starting up to avoid any chance of |
| 910 | * corruption. |
| 911 | */ |
| 912 | void |
| 913 | nfsrv_init(int terminating) |
| 914 | { |
| 915 | struct nfssvc_sock *slp, *nslp; |
| 916 | |
| 917 | lwkt_gettoken(&nfs_token); |
| 918 | if (nfssvc_sockhead_flag & SLP_INIT) |
| 919 | panic("nfsd init"); |
| 920 | nfssvc_sockhead_flag |= SLP_INIT; |
| 921 | |
| 922 | if (terminating) { |
| 923 | TAILQ_FOREACH_MUTABLE(slp, &nfssvc_sockhead, ns_chain, nslp) { |
| 924 | if (slp->ns_flag & SLP_VALID) |
| 925 | nfsrv_zapsock(slp); |
| 926 | /* |
| 927 | TAILQ_REMOVE(&nfssvc_sockhead, slp, ns_chain); |
| 928 | kfree((caddr_t)slp, M_NFSSVC); |
| 929 | */ |
| 930 | } |
| 931 | nfsrv_cleancache(); /* And clear out server cache */ |
| 932 | } else { |
| 933 | nfs_pub.np_valid = 0; |
| 934 | } |
| 935 | |
| 936 | TAILQ_INIT(&nfssvc_sockhead); |
| 937 | nfssvc_sockhead_flag &= ~SLP_INIT; |
| 938 | if (nfssvc_sockhead_flag & SLP_WANTINIT) { |
| 939 | nfssvc_sockhead_flag &= ~SLP_WANTINIT; |
| 940 | wakeup((caddr_t)&nfssvc_sockhead); |
| 941 | } |
| 942 | |
| 943 | TAILQ_INIT(&nfsd_head); |
| 944 | nfsd_head_flag &= ~NFSD_CHECKSLP; |
| 945 | |
| 946 | lwkt_reltoken(&nfs_token); |
| 947 | |
| 948 | #if 0 |
| 949 | nfs_udpsock = (struct nfssvc_sock *) |
| 950 | kmalloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK | M_ZERO); |
| 951 | mtx_init(&nfs_udpsock->ns_solock); |
| 952 | STAILQ_INIT(&nfs_udpsock->ns_rec); |
| 953 | TAILQ_INIT(&nfs_udpsock->ns_uidlruhead); |
| 954 | TAILQ_INSERT_HEAD(&nfssvc_sockhead, nfs_udpsock, ns_chain); |
| 955 | |
| 956 | nfs_cltpsock = (struct nfssvc_sock *) |
| 957 | kmalloc(sizeof (struct nfssvc_sock), M_NFSSVC, M_WAITOK | M_ZERO); |
| 958 | mtx_init(&nfs_cltpsock->ns_solock); |
| 959 | STAILQ_INIT(&nfs_cltpsock->ns_rec); |
| 960 | TAILQ_INIT(&nfs_cltpsock->ns_uidlruhead); |
| 961 | TAILQ_INSERT_TAIL(&nfssvc_sockhead, nfs_cltpsock, ns_chain); |
| 962 | #endif |
| 963 | } |
| 964 | |
| 965 | /* |
| 966 | * Add entries to the server monitor log. |
| 967 | */ |
| 968 | static void |
| 969 | nfsd_rt(int sotype, struct nfsrv_descript *nd, int cacherep) |
| 970 | { |
| 971 | struct drt *rt; |
| 972 | |
| 973 | rt = &nfsdrt.drt[nfsdrt.pos]; |
| 974 | if (cacherep == RC_DOIT) |
| 975 | rt->flag = 0; |
| 976 | else if (cacherep == RC_REPLY) |
| 977 | rt->flag = DRT_CACHEREPLY; |
| 978 | else |
| 979 | rt->flag = DRT_CACHEDROP; |
| 980 | if (sotype == SOCK_STREAM) |
| 981 | rt->flag |= DRT_TCP; |
| 982 | if (nd->nd_flag & ND_NFSV3) |
| 983 | rt->flag |= DRT_NFSV3; |
| 984 | rt->proc = nd->nd_procnum; |
| 985 | if (nd->nd_nam->sa_family == AF_INET) |
| 986 | rt->ipadr = ((struct sockaddr_in *)nd->nd_nam)->sin_addr.s_addr; |
| 987 | else |
| 988 | rt->ipadr = INADDR_ANY; |
| 989 | rt->resptime = nfs_curusec() - (nd->nd_starttime.tv_sec * 1000000 + nd->nd_starttime.tv_usec); |
| 990 | getmicrotime(&rt->tstamp); |
| 991 | nfsdrt.pos = (nfsdrt.pos + 1) % NFSRTTLOGSIZ; |
| 992 | } |
| 993 | #endif /* NFS_NOSERVER */ |
| 994 | |
| 995 | /* |
| 996 | * Get an authorization string for the uid by having the mount_nfs sitting |
| 997 | * on this mount point porpous out of the kernel and do it. |
| 998 | */ |
| 999 | int |
| 1000 | nfs_getauth(struct nfsmount *nmp, struct nfsreq *rep, |
| 1001 | struct ucred *cred, char **auth_str, int *auth_len, char *verf_str, |
| 1002 | int *verf_len, NFSKERBKEY_T key /* return session key */) |
| 1003 | { |
| 1004 | int error = 0; |
| 1005 | |
| 1006 | while ((nmp->nm_state & NFSSTA_WAITAUTH) == 0) { |
| 1007 | nmp->nm_state |= NFSSTA_WANTAUTH; |
| 1008 | (void) tsleep((caddr_t)&nmp->nm_authtype, 0, |
| 1009 | "nfsauth1", 2 * hz); |
| 1010 | error = nfs_sigintr(nmp, rep, rep->r_td); |
| 1011 | if (error) { |
| 1012 | nmp->nm_state &= ~NFSSTA_WANTAUTH; |
| 1013 | return (error); |
| 1014 | } |
| 1015 | } |
| 1016 | nmp->nm_state &= ~(NFSSTA_WAITAUTH | NFSSTA_WANTAUTH); |
| 1017 | nmp->nm_authstr = *auth_str = (char *)kmalloc(RPCAUTH_MAXSIZ, M_TEMP, M_WAITOK); |
| 1018 | nmp->nm_authlen = RPCAUTH_MAXSIZ; |
| 1019 | nmp->nm_verfstr = verf_str; |
| 1020 | nmp->nm_verflen = *verf_len; |
| 1021 | nmp->nm_authuid = cred->cr_uid; |
| 1022 | wakeup((caddr_t)&nmp->nm_authstr); |
| 1023 | |
| 1024 | /* |
| 1025 | * And wait for mount_nfs to do its stuff. |
| 1026 | */ |
| 1027 | while ((nmp->nm_state & NFSSTA_HASAUTH) == 0 && error == 0) { |
| 1028 | (void) tsleep((caddr_t)&nmp->nm_authlen, 0, |
| 1029 | "nfsauth2", 2 * hz); |
| 1030 | error = nfs_sigintr(nmp, rep, rep->r_td); |
| 1031 | } |
| 1032 | if (nmp->nm_state & NFSSTA_AUTHERR) { |
| 1033 | nmp->nm_state &= ~NFSSTA_AUTHERR; |
| 1034 | error = EAUTH; |
| 1035 | } |
| 1036 | if (error) |
| 1037 | kfree((caddr_t)*auth_str, M_TEMP); |
| 1038 | else { |
| 1039 | *auth_len = nmp->nm_authlen; |
| 1040 | *verf_len = nmp->nm_verflen; |
| 1041 | bcopy((caddr_t)nmp->nm_key, (caddr_t)key, sizeof (key)); |
| 1042 | } |
| 1043 | nmp->nm_state &= ~NFSSTA_HASAUTH; |
| 1044 | nmp->nm_state |= NFSSTA_WAITAUTH; |
| 1045 | if (nmp->nm_state & NFSSTA_WANTAUTH) { |
| 1046 | nmp->nm_state &= ~NFSSTA_WANTAUTH; |
| 1047 | wakeup((caddr_t)&nmp->nm_authtype); |
| 1048 | } |
| 1049 | return (error); |
| 1050 | } |
| 1051 | |
| 1052 | /* |
| 1053 | * Get a nickname authenticator and verifier. |
| 1054 | */ |
| 1055 | int |
| 1056 | nfs_getnickauth(struct nfsmount *nmp, struct ucred *cred, char **auth_str, |
| 1057 | int *auth_len, char *verf_str, int verf_len) |
| 1058 | { |
| 1059 | struct nfsuid *nuidp; |
| 1060 | u_int32_t *nickp, *verfp; |
| 1061 | struct timeval ktvin, ktvout; |
| 1062 | |
| 1063 | #ifdef DIAGNOSTIC |
| 1064 | if (verf_len < (4 * NFSX_UNSIGNED)) |
| 1065 | panic("nfs_getnickauth verf too small"); |
| 1066 | #endif |
| 1067 | for (nuidp = NMUIDHASH(nmp, cred->cr_uid)->lh_first; |
| 1068 | nuidp != 0; nuidp = nuidp->nu_hash.le_next) { |
| 1069 | if (nuidp->nu_cr.cr_uid == cred->cr_uid) |
| 1070 | break; |
| 1071 | } |
| 1072 | if (!nuidp || nuidp->nu_expire < time_second) |
| 1073 | return (EACCES); |
| 1074 | |
| 1075 | /* |
| 1076 | * Move to the end of the lru list (end of lru == most recently used). |
| 1077 | */ |
| 1078 | TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, nu_lru); |
| 1079 | TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, nu_lru); |
| 1080 | |
| 1081 | nickp = (u_int32_t *)kmalloc(2 * NFSX_UNSIGNED, M_TEMP, M_WAITOK); |
| 1082 | *nickp++ = txdr_unsigned(RPCAKN_NICKNAME); |
| 1083 | *nickp = txdr_unsigned(nuidp->nu_nickname); |
| 1084 | *auth_str = (char *)nickp; |
| 1085 | *auth_len = 2 * NFSX_UNSIGNED; |
| 1086 | |
| 1087 | /* |
| 1088 | * Now we must encrypt the verifier and package it up. |
| 1089 | */ |
| 1090 | verfp = (u_int32_t *)verf_str; |
| 1091 | *verfp++ = txdr_unsigned(RPCAKN_NICKNAME); |
| 1092 | if (time_second > nuidp->nu_timestamp.tv_sec || |
| 1093 | (time_second == nuidp->nu_timestamp.tv_sec && |
| 1094 | time_second > nuidp->nu_timestamp.tv_usec)) |
| 1095 | getmicrotime(&nuidp->nu_timestamp); |
| 1096 | else |
| 1097 | nuidp->nu_timestamp.tv_usec++; |
| 1098 | ktvin.tv_sec = txdr_unsigned(nuidp->nu_timestamp.tv_sec); |
| 1099 | ktvin.tv_usec = txdr_unsigned(nuidp->nu_timestamp.tv_usec); |
| 1100 | |
| 1101 | /* |
| 1102 | * Now encrypt the timestamp verifier in ecb mode using the session |
| 1103 | * key. |
| 1104 | */ |
| 1105 | #ifdef NFSKERB |
| 1106 | XXX |
| 1107 | #else |
| 1108 | ktvout.tv_sec = 0; |
| 1109 | ktvout.tv_usec = 0; |
| 1110 | #endif |
| 1111 | |
| 1112 | *verfp++ = ktvout.tv_sec; |
| 1113 | *verfp++ = ktvout.tv_usec; |
| 1114 | *verfp = 0; |
| 1115 | return (0); |
| 1116 | } |
| 1117 | |
| 1118 | /* |
| 1119 | * Save the current nickname in a hash list entry on the mount point. |
| 1120 | */ |
| 1121 | int |
| 1122 | nfs_savenickauth(struct nfsmount *nmp, struct ucred *cred, int len, |
| 1123 | NFSKERBKEY_T key, struct mbuf **mdp, char **dposp, |
| 1124 | struct mbuf *mrep) |
| 1125 | { |
| 1126 | struct nfsuid *nuidp; |
| 1127 | u_int32_t *tl; |
| 1128 | struct timeval ktvin, ktvout; |
| 1129 | u_int32_t nick; |
| 1130 | int deltasec, error = 0; |
| 1131 | struct nfsm_info info; |
| 1132 | |
| 1133 | info.md = *mdp; |
| 1134 | info.dpos = *dposp; |
| 1135 | info.mrep = mrep; |
| 1136 | |
| 1137 | if (len == (3 * NFSX_UNSIGNED)) { |
| 1138 | NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED)); |
| 1139 | ktvin.tv_sec = *tl++; |
| 1140 | ktvin.tv_usec = *tl++; |
| 1141 | nick = fxdr_unsigned(u_int32_t, *tl); |
| 1142 | |
| 1143 | /* |
| 1144 | * Decrypt the timestamp in ecb mode. |
| 1145 | */ |
| 1146 | #ifdef NFSKERB |
| 1147 | XXX |
| 1148 | #else |
| 1149 | ktvout.tv_sec = 0; |
| 1150 | ktvout.tv_usec = 0; |
| 1151 | #endif |
| 1152 | ktvout.tv_sec = fxdr_unsigned(long, ktvout.tv_sec); |
| 1153 | ktvout.tv_usec = fxdr_unsigned(long, ktvout.tv_usec); |
| 1154 | deltasec = time_second - ktvout.tv_sec; |
| 1155 | if (deltasec < 0) |
| 1156 | deltasec = -deltasec; |
| 1157 | /* |
| 1158 | * If ok, add it to the hash list for the mount point. |
| 1159 | */ |
| 1160 | if (deltasec <= NFS_KERBCLOCKSKEW) { |
| 1161 | if (nmp->nm_numuids < nuidhash_max) { |
| 1162 | nmp->nm_numuids++; |
| 1163 | nuidp = (struct nfsuid *) |
| 1164 | kmalloc(sizeof (struct nfsuid), M_NFSUID, |
| 1165 | M_WAITOK); |
| 1166 | } else { |
| 1167 | nuidp = TAILQ_FIRST(&nmp->nm_uidlruhead); |
| 1168 | LIST_REMOVE(nuidp, nu_hash); |
| 1169 | TAILQ_REMOVE(&nmp->nm_uidlruhead, nuidp, |
| 1170 | nu_lru); |
| 1171 | } |
| 1172 | nuidp->nu_flag = 0; |
| 1173 | nuidp->nu_cr.cr_uid = cred->cr_uid; |
| 1174 | nuidp->nu_expire = time_second + NFS_KERBTTL; |
| 1175 | nuidp->nu_timestamp = ktvout; |
| 1176 | nuidp->nu_nickname = nick; |
| 1177 | bcopy(key, nuidp->nu_key, sizeof (key)); |
| 1178 | TAILQ_INSERT_TAIL(&nmp->nm_uidlruhead, nuidp, |
| 1179 | nu_lru); |
| 1180 | LIST_INSERT_HEAD(NMUIDHASH(nmp, cred->cr_uid), |
| 1181 | nuidp, nu_hash); |
| 1182 | } |
| 1183 | } else { |
| 1184 | ERROROUT(nfsm_adv(&info, nfsm_rndup(len))); |
| 1185 | } |
| 1186 | nfsmout: |
| 1187 | *mdp = info.md; |
| 1188 | *dposp = info.dpos; |
| 1189 | return (error); |
| 1190 | } |