| 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_serv.c 8.8 (Berkeley) 7/31/95 |
| 37 | * $FreeBSD: src/sys/nfs/nfs_serv.c,v 1.93.2.6 2002/12/29 18:19:53 dillon Exp $ |
| 38 | * $DragonFly: src/sys/vfs/nfs/nfs_serv.c,v 1.48 2008/09/17 21:44:24 dillon Exp $ |
| 39 | */ |
| 40 | |
| 41 | /* |
| 42 | * nfs version 2 and 3 server calls to vnode ops |
| 43 | * - these routines generally have 3 phases |
| 44 | * 1 - break down and validate rpc request in mbuf list |
| 45 | * 2 - do the vnode ops for the request |
| 46 | * (surprisingly ?? many are very similar to syscalls in vfs_syscalls.c) |
| 47 | * 3 - build the rpc reply in an mbuf list |
| 48 | * nb: |
| 49 | * - do not mix the phases, since the nfsm_?? macros can return failures |
| 50 | * on a bad rpc or similar and do not do any vrele() or vput()'s |
| 51 | * |
| 52 | * - the nfsm_reply() macro generates an nfs rpc reply with the nfs |
| 53 | * error number iff error != 0 whereas |
| 54 | * returning an error from the server function implies a fatal error |
| 55 | * such as a badly constructed rpc request that should be dropped without |
| 56 | * a reply. |
| 57 | * For Version 3, nfsm_reply() does not return for the error case, since |
| 58 | * most version 3 rpcs return more than the status for error cases. |
| 59 | * |
| 60 | * Other notes: |
| 61 | * Warning: always pay careful attention to resource cleanup on return |
| 62 | * and note that nfsm_*() macros can terminate a procedure on certain |
| 63 | * errors. |
| 64 | */ |
| 65 | |
| 66 | #include <sys/param.h> |
| 67 | #include <sys/systm.h> |
| 68 | #include <sys/proc.h> |
| 69 | #include <sys/priv.h> |
| 70 | #include <sys/nlookup.h> |
| 71 | #include <sys/namei.h> |
| 72 | #include <sys/unistd.h> |
| 73 | #include <sys/vnode.h> |
| 74 | #include <sys/mount.h> |
| 75 | #include <sys/socket.h> |
| 76 | #include <sys/socketvar.h> |
| 77 | #include <sys/malloc.h> |
| 78 | #include <sys/mbuf.h> |
| 79 | #include <sys/dirent.h> |
| 80 | #include <sys/stat.h> |
| 81 | #include <sys/kernel.h> |
| 82 | #include <sys/sysctl.h> |
| 83 | #include <sys/buf.h> |
| 84 | |
| 85 | #include <vm/vm.h> |
| 86 | #include <vm/vm_extern.h> |
| 87 | #include <vm/vm_zone.h> |
| 88 | #include <vm/vm_object.h> |
| 89 | |
| 90 | #include <sys/buf2.h> |
| 91 | |
| 92 | #include <sys/thread2.h> |
| 93 | |
| 94 | #include "nfsproto.h" |
| 95 | #include "rpcv2.h" |
| 96 | #include "nfs.h" |
| 97 | #include "xdr_subs.h" |
| 98 | #include "nfsm_subs.h" |
| 99 | |
| 100 | #ifdef NFSRV_DEBUG |
| 101 | #define nfsdbprintf(info) kprintf info |
| 102 | #else |
| 103 | #define nfsdbprintf(info) |
| 104 | #endif |
| 105 | |
| 106 | #define MAX_COMMIT_COUNT (1024 * 1024) |
| 107 | |
| 108 | #define NUM_HEURISTIC 1017 |
| 109 | #define NHUSE_INIT 64 |
| 110 | #define NHUSE_INC 16 |
| 111 | #define NHUSE_MAX 2048 |
| 112 | |
| 113 | static struct nfsheur { |
| 114 | struct vnode *nh_vp; /* vp to match (unreferenced pointer) */ |
| 115 | off_t nh_nextr; /* next offset for sequential detection */ |
| 116 | int nh_use; /* use count for selection */ |
| 117 | int nh_seqcount; /* heuristic */ |
| 118 | } nfsheur[NUM_HEURISTIC]; |
| 119 | |
| 120 | nfstype nfsv3_type[9] = { NFNON, NFREG, NFDIR, NFBLK, NFCHR, NFLNK, NFSOCK, |
| 121 | NFFIFO, NFNON }; |
| 122 | #ifndef NFS_NOSERVER |
| 123 | nfstype nfsv2_type[9] = { NFNON, NFREG, NFDIR, NFBLK, NFCHR, NFLNK, NFNON, |
| 124 | NFCHR, NFNON }; |
| 125 | |
| 126 | int nfsrvw_procrastinate = NFS_GATHERDELAY * 1000; |
| 127 | int nfsrvw_procrastinate_v3 = 0; |
| 128 | |
| 129 | static struct timespec nfsver; |
| 130 | |
| 131 | SYSCTL_DECL(_vfs_nfs); |
| 132 | |
| 133 | int nfs_async; |
| 134 | SYSCTL_INT(_vfs_nfs, OID_AUTO, async, CTLFLAG_RW, &nfs_async, 0, |
| 135 | "Enable unstable and fast writes"); |
| 136 | static int nfs_commit_blks; |
| 137 | static int nfs_commit_miss; |
| 138 | SYSCTL_INT(_vfs_nfs, OID_AUTO, commit_blks, CTLFLAG_RW, &nfs_commit_blks, 0, |
| 139 | "Number of commited blocks"); |
| 140 | SYSCTL_INT(_vfs_nfs, OID_AUTO, commit_miss, CTLFLAG_RW, &nfs_commit_miss, 0, |
| 141 | "Number of nfs blocks committed from dirty buffers"); |
| 142 | |
| 143 | static int nfsrv_access (struct mount *, struct vnode *, int, |
| 144 | struct ucred *, int, struct thread *, int); |
| 145 | static void nfsrvw_coalesce (struct nfsrv_descript *, |
| 146 | struct nfsrv_descript *); |
| 147 | |
| 148 | /* |
| 149 | * nfs v3 access service |
| 150 | */ |
| 151 | int |
| 152 | nfsrv3_access(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, |
| 153 | struct thread *td, struct mbuf **mrq) |
| 154 | { |
| 155 | struct sockaddr *nam = nfsd->nd_nam; |
| 156 | struct ucred *cred = &nfsd->nd_cr; |
| 157 | struct vnode *vp = NULL; |
| 158 | struct mount *mp = NULL; |
| 159 | nfsfh_t nfh; |
| 160 | fhandle_t *fhp; |
| 161 | int error = 0, rdonly, getret; |
| 162 | struct vattr vattr, *vap = &vattr; |
| 163 | u_long testmode, nfsmode; |
| 164 | struct nfsm_info info; |
| 165 | u_int32_t *tl; |
| 166 | |
| 167 | info.dpos = nfsd->nd_dpos; |
| 168 | info.md = nfsd->nd_md; |
| 169 | info.mrep = nfsd->nd_mrep; |
| 170 | info.mreq = NULL; |
| 171 | |
| 172 | nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); |
| 173 | fhp = &nfh.fh_generic; |
| 174 | NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, fhp, &error)); |
| 175 | NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED)); |
| 176 | error = nfsrv_fhtovp(fhp, 1, &mp, &vp, cred, slp, nam, &rdonly, |
| 177 | (nfsd->nd_flag & ND_KERBAUTH), TRUE); |
| 178 | if (error) { |
| 179 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_UNSIGNED, &error)); |
| 180 | nfsm_srvpostop_attr(&info, nfsd, 1, NULL); |
| 181 | error = 0; |
| 182 | goto nfsmout; |
| 183 | } |
| 184 | nfsmode = fxdr_unsigned(u_int32_t, *tl); |
| 185 | if ((nfsmode & NFSV3ACCESS_READ) && |
| 186 | nfsrv_access(mp, vp, VREAD, cred, rdonly, td, 0)) |
| 187 | nfsmode &= ~NFSV3ACCESS_READ; |
| 188 | if (vp->v_type == VDIR) |
| 189 | testmode = (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | |
| 190 | NFSV3ACCESS_DELETE); |
| 191 | else |
| 192 | testmode = (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); |
| 193 | if ((nfsmode & testmode) && |
| 194 | nfsrv_access(mp, vp, VWRITE, cred, rdonly, td, 0)) |
| 195 | nfsmode &= ~testmode; |
| 196 | if (vp->v_type == VDIR) |
| 197 | testmode = NFSV3ACCESS_LOOKUP; |
| 198 | else |
| 199 | testmode = NFSV3ACCESS_EXECUTE; |
| 200 | if ((nfsmode & testmode) && |
| 201 | nfsrv_access(mp, vp, VEXEC, cred, rdonly, td, 0)) |
| 202 | nfsmode &= ~testmode; |
| 203 | getret = VOP_GETATTR(vp, vap); |
| 204 | vput(vp); |
| 205 | vp = NULL; |
| 206 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, |
| 207 | NFSX_POSTOPATTR(1) + NFSX_UNSIGNED, &error)); |
| 208 | nfsm_srvpostop_attr(&info, nfsd, getret, vap); |
| 209 | tl = nfsm_build(&info, NFSX_UNSIGNED); |
| 210 | *tl = txdr_unsigned(nfsmode); |
| 211 | nfsmout: |
| 212 | *mrq = info.mreq; |
| 213 | if (vp) |
| 214 | vput(vp); |
| 215 | return(error); |
| 216 | } |
| 217 | |
| 218 | /* |
| 219 | * nfs getattr service |
| 220 | */ |
| 221 | int |
| 222 | nfsrv_getattr(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, |
| 223 | struct thread *td, struct mbuf **mrq) |
| 224 | { |
| 225 | struct sockaddr *nam = nfsd->nd_nam; |
| 226 | struct ucred *cred = &nfsd->nd_cr; |
| 227 | struct nfs_fattr *fp; |
| 228 | struct vattr va; |
| 229 | struct vattr *vap = &va; |
| 230 | struct vnode *vp = NULL; |
| 231 | struct mount *mp = NULL; |
| 232 | nfsfh_t nfh; |
| 233 | fhandle_t *fhp; |
| 234 | int error = 0, rdonly; |
| 235 | struct nfsm_info info; |
| 236 | |
| 237 | info.mrep = nfsd->nd_mrep; |
| 238 | info.md = nfsd->nd_md; |
| 239 | info.dpos = nfsd->nd_dpos; |
| 240 | info.mreq = NULL; |
| 241 | |
| 242 | nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); |
| 243 | fhp = &nfh.fh_generic; |
| 244 | NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, fhp, &error)); |
| 245 | error = nfsrv_fhtovp(fhp, 1, &mp, &vp, cred, slp, nam, |
| 246 | &rdonly, (nfsd->nd_flag & ND_KERBAUTH), TRUE); |
| 247 | if (error) { |
| 248 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, 0, &error)); |
| 249 | error = 0; |
| 250 | goto nfsmout; |
| 251 | } |
| 252 | error = VOP_GETATTR(vp, vap); |
| 253 | vput(vp); |
| 254 | vp = NULL; |
| 255 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, |
| 256 | NFSX_FATTR(nfsd->nd_flag & ND_NFSV3), &error)); |
| 257 | if (error) { |
| 258 | error = 0; |
| 259 | goto nfsmout; |
| 260 | } |
| 261 | fp = nfsm_build(&info, NFSX_FATTR(nfsd->nd_flag & ND_NFSV3)); |
| 262 | nfsm_srvfattr(nfsd, vap, fp); |
| 263 | /* fall through */ |
| 264 | |
| 265 | nfsmout: |
| 266 | *mrq = info.mreq; |
| 267 | if (vp) |
| 268 | vput(vp); |
| 269 | return(error); |
| 270 | } |
| 271 | |
| 272 | /* |
| 273 | * nfs setattr service |
| 274 | */ |
| 275 | int |
| 276 | nfsrv_setattr(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, |
| 277 | struct thread *td, struct mbuf **mrq) |
| 278 | { |
| 279 | struct sockaddr *nam = nfsd->nd_nam; |
| 280 | struct ucred *cred = &nfsd->nd_cr; |
| 281 | struct vattr va, preat; |
| 282 | struct vattr *vap = &va; |
| 283 | struct nfsv2_sattr *sp; |
| 284 | struct nfs_fattr *fp; |
| 285 | struct vnode *vp = NULL; |
| 286 | struct mount *mp = NULL; |
| 287 | nfsfh_t nfh; |
| 288 | fhandle_t *fhp; |
| 289 | u_int32_t *tl; |
| 290 | int error = 0, rdonly, preat_ret = 1, postat_ret = 1; |
| 291 | int gcheck = 0; |
| 292 | struct timespec guard; |
| 293 | struct nfsm_info info; |
| 294 | |
| 295 | info.mrep = nfsd->nd_mrep; |
| 296 | info.mreq = NULL; |
| 297 | info.md = nfsd->nd_md; |
| 298 | info.dpos = nfsd->nd_dpos; |
| 299 | info.v3 = (nfsd->nd_flag & ND_NFSV3); |
| 300 | |
| 301 | guard.tv_sec = 0; /* fix compiler warning */ |
| 302 | guard.tv_nsec = 0; |
| 303 | |
| 304 | nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); |
| 305 | fhp = &nfh.fh_generic; |
| 306 | NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, fhp, &error)); |
| 307 | VATTR_NULL(vap); |
| 308 | if (info.v3) { |
| 309 | ERROROUT(nfsm_srvsattr(&info, vap)); |
| 310 | NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED)); |
| 311 | gcheck = fxdr_unsigned(int, *tl); |
| 312 | if (gcheck) { |
| 313 | NULLOUT(tl = nfsm_dissect(&info, 2 * NFSX_UNSIGNED)); |
| 314 | fxdr_nfsv3time(tl, &guard); |
| 315 | } |
| 316 | } else { |
| 317 | NULLOUT(sp = nfsm_dissect(&info, NFSX_V2SATTR)); |
| 318 | /* |
| 319 | * Nah nah nah nah na nah |
| 320 | * There is a bug in the Sun client that puts 0xffff in the mode |
| 321 | * field of sattr when it should put in 0xffffffff. The u_short |
| 322 | * doesn't sign extend. |
| 323 | * --> check the low order 2 bytes for 0xffff |
| 324 | */ |
| 325 | if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) |
| 326 | vap->va_mode = nfstov_mode(sp->sa_mode); |
| 327 | if (sp->sa_uid != nfs_xdrneg1) |
| 328 | vap->va_uid = fxdr_unsigned(uid_t, sp->sa_uid); |
| 329 | if (sp->sa_gid != nfs_xdrneg1) |
| 330 | vap->va_gid = fxdr_unsigned(gid_t, sp->sa_gid); |
| 331 | if (sp->sa_size != nfs_xdrneg1) |
| 332 | vap->va_size = fxdr_unsigned(u_quad_t, sp->sa_size); |
| 333 | if (sp->sa_atime.nfsv2_sec != nfs_xdrneg1) { |
| 334 | #ifdef notyet |
| 335 | fxdr_nfsv2time(&sp->sa_atime, &vap->va_atime); |
| 336 | #else |
| 337 | vap->va_atime.tv_sec = |
| 338 | fxdr_unsigned(int32_t, sp->sa_atime.nfsv2_sec); |
| 339 | vap->va_atime.tv_nsec = 0; |
| 340 | #endif |
| 341 | } |
| 342 | if (sp->sa_mtime.nfsv2_sec != nfs_xdrneg1) |
| 343 | fxdr_nfsv2time(&sp->sa_mtime, &vap->va_mtime); |
| 344 | |
| 345 | } |
| 346 | |
| 347 | /* |
| 348 | * Now that we have all the fields, lets do it. |
| 349 | */ |
| 350 | error = nfsrv_fhtovp(fhp, 1, &mp, &vp, cred, slp, nam, &rdonly, |
| 351 | (nfsd->nd_flag & ND_KERBAUTH), TRUE); |
| 352 | if (error) { |
| 353 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, |
| 354 | 2 * NFSX_UNSIGNED, &error)); |
| 355 | nfsm_srvwcc_data(&info, nfsd, preat_ret, &preat, |
| 356 | postat_ret, vap); |
| 357 | error = 0; |
| 358 | goto nfsmout; |
| 359 | } |
| 360 | |
| 361 | /* |
| 362 | * vp now an active resource, pay careful attention to cleanup |
| 363 | */ |
| 364 | |
| 365 | if (info.v3) { |
| 366 | error = preat_ret = VOP_GETATTR(vp, &preat); |
| 367 | if (!error && gcheck && |
| 368 | (preat.va_ctime.tv_sec != guard.tv_sec || |
| 369 | preat.va_ctime.tv_nsec != guard.tv_nsec)) |
| 370 | error = NFSERR_NOT_SYNC; |
| 371 | if (error) { |
| 372 | vput(vp); |
| 373 | vp = NULL; |
| 374 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, |
| 375 | NFSX_WCCDATA(info.v3), &error)); |
| 376 | nfsm_srvwcc_data(&info, nfsd, preat_ret, &preat, |
| 377 | postat_ret, vap); |
| 378 | error = 0; |
| 379 | goto nfsmout; |
| 380 | } |
| 381 | } |
| 382 | |
| 383 | /* |
| 384 | * If the size is being changed write acces is required, otherwise |
| 385 | * just check for a read only file system. |
| 386 | */ |
| 387 | if (vap->va_size == ((u_quad_t)((quad_t) -1))) { |
| 388 | if (rdonly || (mp->mnt_flag & MNT_RDONLY)) { |
| 389 | error = EROFS; |
| 390 | goto out; |
| 391 | } |
| 392 | } else { |
| 393 | if (vp->v_type == VDIR) { |
| 394 | error = EISDIR; |
| 395 | goto out; |
| 396 | } else if ((error = nfsrv_access(mp, vp, VWRITE, cred, rdonly, |
| 397 | td, 0)) != 0){ |
| 398 | goto out; |
| 399 | } |
| 400 | } |
| 401 | error = VOP_SETATTR(vp, vap, cred); |
| 402 | postat_ret = VOP_GETATTR(vp, vap); |
| 403 | if (!error) |
| 404 | error = postat_ret; |
| 405 | out: |
| 406 | vput(vp); |
| 407 | vp = NULL; |
| 408 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, |
| 409 | NFSX_WCCORFATTR(info.v3), &error)); |
| 410 | if (info.v3) { |
| 411 | nfsm_srvwcc_data(&info, nfsd, preat_ret, &preat, |
| 412 | postat_ret, vap); |
| 413 | error = 0; |
| 414 | goto nfsmout; |
| 415 | } else { |
| 416 | fp = nfsm_build(&info, NFSX_V2FATTR); |
| 417 | nfsm_srvfattr(nfsd, vap, fp); |
| 418 | } |
| 419 | /* fall through */ |
| 420 | |
| 421 | nfsmout: |
| 422 | *mrq = info.mreq; |
| 423 | if (vp) |
| 424 | vput(vp); |
| 425 | return(error); |
| 426 | } |
| 427 | |
| 428 | /* |
| 429 | * nfs lookup rpc |
| 430 | */ |
| 431 | int |
| 432 | nfsrv_lookup(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, |
| 433 | struct thread *td, struct mbuf **mrq) |
| 434 | { |
| 435 | struct sockaddr *nam = nfsd->nd_nam; |
| 436 | struct ucred *cred = &nfsd->nd_cr; |
| 437 | struct nfs_fattr *fp; |
| 438 | struct nlookupdata nd; |
| 439 | struct vnode *vp; |
| 440 | struct vnode *dirp; |
| 441 | struct nchandle nch; |
| 442 | nfsfh_t nfh; |
| 443 | fhandle_t *fhp; |
| 444 | int error = 0, len, dirattr_ret = 1; |
| 445 | int pubflag; |
| 446 | struct vattr va, dirattr, *vap = &va; |
| 447 | struct nfsm_info info; |
| 448 | |
| 449 | info.mrep = nfsd->nd_mrep; |
| 450 | info.mreq = NULL; |
| 451 | info.md = nfsd->nd_md; |
| 452 | info.dpos = nfsd->nd_dpos; |
| 453 | info.v3 = (nfsd->nd_flag & ND_NFSV3); |
| 454 | |
| 455 | nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); |
| 456 | nlookup_zero(&nd); |
| 457 | dirp = NULL; |
| 458 | vp = NULL; |
| 459 | |
| 460 | fhp = &nfh.fh_generic; |
| 461 | NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, fhp, &error)); |
| 462 | NEGREPLYOUT(len = nfsm_srvnamesiz(&info, &error)); |
| 463 | |
| 464 | pubflag = nfs_ispublicfh(fhp); |
| 465 | |
| 466 | error = nfs_namei(&nd, cred, 0, NULL, &vp, |
| 467 | fhp, len, slp, nam, &info.md, &info.dpos, |
| 468 | &dirp, td, (nfsd->nd_flag & ND_KERBAUTH), pubflag); |
| 469 | |
| 470 | /* |
| 471 | * namei failure, only dirp to cleanup. Clear out garbarge from |
| 472 | * structure in case macros jump to nfsmout. |
| 473 | */ |
| 474 | |
| 475 | if (error) { |
| 476 | if (dirp) { |
| 477 | if (info.v3) |
| 478 | dirattr_ret = VOP_GETATTR(dirp, &dirattr); |
| 479 | vrele(dirp); |
| 480 | dirp = NULL; |
| 481 | } |
| 482 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, |
| 483 | NFSX_POSTOPATTR(info.v3), &error)); |
| 484 | nfsm_srvpostop_attr(&info, nfsd, dirattr_ret, &dirattr); |
| 485 | error = 0; |
| 486 | goto nfsmout; |
| 487 | } |
| 488 | |
| 489 | /* |
| 490 | * Locate index file for public filehandle |
| 491 | * |
| 492 | * error is 0 on entry and 0 on exit from this block. |
| 493 | */ |
| 494 | |
| 495 | if (pubflag) { |
| 496 | if (vp->v_type == VDIR && nfs_pub.np_index != NULL) { |
| 497 | /* |
| 498 | * Setup call to lookup() to see if we can find |
| 499 | * the index file. Arguably, this doesn't belong |
| 500 | * in a kernel.. Ugh. If an error occurs, do not |
| 501 | * try to install an index file and then clear the |
| 502 | * error. |
| 503 | * |
| 504 | * When we replace nd with ind and redirect ndp, |
| 505 | * maintenance of ni_startdir and ni_vp shift to |
| 506 | * ind and we have to clean them up in the old nd. |
| 507 | * However, the cnd resource continues to be maintained |
| 508 | * via the original nd. Confused? You aren't alone! |
| 509 | */ |
| 510 | vn_unlock(vp); |
| 511 | cache_copy(&nd.nl_nch, &nch); |
| 512 | nlookup_done(&nd); |
| 513 | error = nlookup_init_raw(&nd, nfs_pub.np_index, |
| 514 | UIO_SYSSPACE, 0, cred, &nch); |
| 515 | cache_drop(&nch); |
| 516 | if (error == 0) |
| 517 | error = nlookup(&nd); |
| 518 | |
| 519 | if (error == 0) { |
| 520 | /* |
| 521 | * Found an index file. Get rid of |
| 522 | * the old references. transfer vp and |
| 523 | * load up the new vp. Fortunately we do |
| 524 | * not have to deal with dvp, that would be |
| 525 | * a huge mess. |
| 526 | */ |
| 527 | if (dirp) |
| 528 | vrele(dirp); |
| 529 | dirp = vp; |
| 530 | vp = NULL; |
| 531 | error = cache_vget(&nd.nl_nch, nd.nl_cred, |
| 532 | LK_EXCLUSIVE, &vp); |
| 533 | KKASSERT(error == 0); |
| 534 | } |
| 535 | error = 0; |
| 536 | } |
| 537 | /* |
| 538 | * If the public filehandle was used, check that this lookup |
| 539 | * didn't result in a filehandle outside the publicly exported |
| 540 | * filesystem. We clear the poor vp here to avoid lockups due |
| 541 | * to NFS I/O. |
| 542 | */ |
| 543 | |
| 544 | if (vp->v_mount != nfs_pub.np_mount) { |
| 545 | vput(vp); |
| 546 | vp = NULL; |
| 547 | error = EPERM; |
| 548 | } |
| 549 | } |
| 550 | |
| 551 | if (dirp) { |
| 552 | if (info.v3) |
| 553 | dirattr_ret = VOP_GETATTR(dirp, &dirattr); |
| 554 | vrele(dirp); |
| 555 | dirp = NULL; |
| 556 | } |
| 557 | |
| 558 | /* |
| 559 | * Resources at this point: |
| 560 | * ndp->ni_vp may not be NULL |
| 561 | * |
| 562 | */ |
| 563 | |
| 564 | if (error) { |
| 565 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, |
| 566 | NFSX_POSTOPATTR(info.v3), &error)); |
| 567 | nfsm_srvpostop_attr(&info, nfsd, dirattr_ret, &dirattr); |
| 568 | error = 0; |
| 569 | goto nfsmout; |
| 570 | } |
| 571 | |
| 572 | /* |
| 573 | * Clear out some resources prior to potentially blocking. This |
| 574 | * is not as critical as ni_dvp resources in other routines, but |
| 575 | * it helps. |
| 576 | */ |
| 577 | nlookup_done(&nd); |
| 578 | |
| 579 | /* |
| 580 | * Get underlying attribute, then release remaining resources ( for |
| 581 | * the same potential blocking reason ) and reply. |
| 582 | */ |
| 583 | bzero(&fhp->fh_fid, sizeof(fhp->fh_fid)); |
| 584 | error = VFS_VPTOFH(vp, &fhp->fh_fid); |
| 585 | if (!error) |
| 586 | error = VOP_GETATTR(vp, vap); |
| 587 | |
| 588 | vput(vp); |
| 589 | vp = NULL; |
| 590 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, |
| 591 | NFSX_SRVFH(info.v3) + |
| 592 | NFSX_POSTOPORFATTR(info.v3) + |
| 593 | NFSX_POSTOPATTR(info.v3), |
| 594 | &error)); |
| 595 | if (error) { |
| 596 | nfsm_srvpostop_attr(&info, nfsd, dirattr_ret, &dirattr); |
| 597 | error = 0; |
| 598 | goto nfsmout; |
| 599 | } |
| 600 | nfsm_srvfhtom(&info, fhp); |
| 601 | if (info.v3) { |
| 602 | nfsm_srvpostop_attr(&info, nfsd, 0, vap); |
| 603 | nfsm_srvpostop_attr(&info, nfsd, dirattr_ret, &dirattr); |
| 604 | } else { |
| 605 | fp = nfsm_build(&info, NFSX_V2FATTR); |
| 606 | nfsm_srvfattr(nfsd, vap, fp); |
| 607 | } |
| 608 | |
| 609 | nfsmout: |
| 610 | *mrq = info.mreq; |
| 611 | if (dirp) |
| 612 | vrele(dirp); |
| 613 | nlookup_done(&nd); /* may be called twice */ |
| 614 | if (vp) |
| 615 | vput(vp); |
| 616 | return (error); |
| 617 | } |
| 618 | |
| 619 | /* |
| 620 | * nfs readlink service |
| 621 | */ |
| 622 | int |
| 623 | nfsrv_readlink(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, |
| 624 | struct thread *td, struct mbuf **mrq) |
| 625 | { |
| 626 | struct sockaddr *nam = nfsd->nd_nam; |
| 627 | struct ucred *cred = &nfsd->nd_cr; |
| 628 | struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; |
| 629 | struct iovec *ivp = iv; |
| 630 | u_int32_t *tl; |
| 631 | int error = 0, rdonly, i, tlen, len, getret; |
| 632 | struct mbuf *mp1, *mp2, *mp3; |
| 633 | struct vnode *vp = NULL; |
| 634 | struct mount *mp = NULL; |
| 635 | struct vattr attr; |
| 636 | nfsfh_t nfh; |
| 637 | fhandle_t *fhp; |
| 638 | struct uio io, *uiop = &io; |
| 639 | struct nfsm_info info; |
| 640 | |
| 641 | info.mrep = nfsd->nd_mrep; |
| 642 | info.mreq = NULL; |
| 643 | info.md = nfsd->nd_md; |
| 644 | info.dpos = nfsd->nd_dpos; |
| 645 | info.v3 = (nfsd->nd_flag & ND_NFSV3); |
| 646 | |
| 647 | nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); |
| 648 | #ifndef nolint |
| 649 | mp2 = NULL; |
| 650 | #endif |
| 651 | mp3 = NULL; |
| 652 | fhp = &nfh.fh_generic; |
| 653 | NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, fhp, &error)); |
| 654 | len = 0; |
| 655 | i = 0; |
| 656 | while (len < NFS_MAXPATHLEN) { |
| 657 | mp1 = m_getcl(MB_WAIT, MT_DATA, 0); |
| 658 | mp1->m_len = MCLBYTES; |
| 659 | if (len == 0) |
| 660 | mp3 = mp2 = mp1; |
| 661 | else { |
| 662 | mp2->m_next = mp1; |
| 663 | mp2 = mp1; |
| 664 | } |
| 665 | if ((len + mp1->m_len) > NFS_MAXPATHLEN) { |
| 666 | mp1->m_len = NFS_MAXPATHLEN-len; |
| 667 | len = NFS_MAXPATHLEN; |
| 668 | } else |
| 669 | len += mp1->m_len; |
| 670 | ivp->iov_base = mtod(mp1, caddr_t); |
| 671 | ivp->iov_len = mp1->m_len; |
| 672 | i++; |
| 673 | ivp++; |
| 674 | } |
| 675 | uiop->uio_iov = iv; |
| 676 | uiop->uio_iovcnt = i; |
| 677 | uiop->uio_offset = 0; |
| 678 | uiop->uio_resid = len; |
| 679 | uiop->uio_rw = UIO_READ; |
| 680 | uiop->uio_segflg = UIO_SYSSPACE; |
| 681 | uiop->uio_td = NULL; |
| 682 | error = nfsrv_fhtovp(fhp, 1, &mp, &vp, cred, slp, nam, |
| 683 | &rdonly, (nfsd->nd_flag & ND_KERBAUTH), TRUE); |
| 684 | if (error) { |
| 685 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, |
| 686 | 2 * NFSX_UNSIGNED, &error)); |
| 687 | nfsm_srvpostop_attr(&info, nfsd, 1, NULL); |
| 688 | error = 0; |
| 689 | goto nfsmout; |
| 690 | } |
| 691 | if (vp->v_type != VLNK) { |
| 692 | if (info.v3) |
| 693 | error = EINVAL; |
| 694 | else |
| 695 | error = ENXIO; |
| 696 | goto out; |
| 697 | } |
| 698 | error = VOP_READLINK(vp, uiop, cred); |
| 699 | out: |
| 700 | getret = VOP_GETATTR(vp, &attr); |
| 701 | vput(vp); |
| 702 | vp = NULL; |
| 703 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, |
| 704 | NFSX_POSTOPATTR(info.v3) + NFSX_UNSIGNED, |
| 705 | &error)); |
| 706 | if (info.v3) { |
| 707 | nfsm_srvpostop_attr(&info, nfsd, getret, &attr); |
| 708 | if (error) { |
| 709 | error = 0; |
| 710 | goto nfsmout; |
| 711 | } |
| 712 | } |
| 713 | if (uiop->uio_resid > 0) { |
| 714 | len -= uiop->uio_resid; |
| 715 | tlen = nfsm_rndup(len); |
| 716 | nfsm_adj(mp3, NFS_MAXPATHLEN-tlen, tlen-len); |
| 717 | } |
| 718 | tl = nfsm_build(&info, NFSX_UNSIGNED); |
| 719 | *tl = txdr_unsigned(len); |
| 720 | info.mb->m_next = mp3; |
| 721 | mp3 = NULL; |
| 722 | nfsmout: |
| 723 | *mrq = info.mreq; |
| 724 | if (mp3) |
| 725 | m_freem(mp3); |
| 726 | if (vp) |
| 727 | vput(vp); |
| 728 | return(error); |
| 729 | } |
| 730 | |
| 731 | /* |
| 732 | * nfs read service |
| 733 | */ |
| 734 | int |
| 735 | nfsrv_read(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, |
| 736 | struct thread *td, struct mbuf **mrq) |
| 737 | { |
| 738 | struct nfsm_info info; |
| 739 | struct sockaddr *nam = nfsd->nd_nam; |
| 740 | struct ucred *cred = &nfsd->nd_cr; |
| 741 | struct iovec *iv; |
| 742 | struct iovec *iv2; |
| 743 | struct mbuf *m; |
| 744 | struct nfs_fattr *fp; |
| 745 | u_int32_t *tl; |
| 746 | int i; |
| 747 | int reqlen; |
| 748 | int error = 0, rdonly, cnt, len, left, siz, tlen, getret; |
| 749 | struct mbuf *m2; |
| 750 | struct vnode *vp = NULL; |
| 751 | struct mount *mp = NULL; |
| 752 | nfsfh_t nfh; |
| 753 | fhandle_t *fhp; |
| 754 | struct uio io, *uiop = &io; |
| 755 | struct vattr va, *vap = &va; |
| 756 | struct nfsheur *nh; |
| 757 | off_t off; |
| 758 | int ioflag = 0; |
| 759 | |
| 760 | info.mrep = nfsd->nd_mrep; |
| 761 | info.mreq = NULL; |
| 762 | info.md = nfsd->nd_md; |
| 763 | info.dpos = nfsd->nd_dpos; |
| 764 | info.v3 = (nfsd->nd_flag & ND_NFSV3); |
| 765 | |
| 766 | nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); |
| 767 | fhp = &nfh.fh_generic; |
| 768 | NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, fhp, &error)); |
| 769 | if (info.v3) { |
| 770 | NULLOUT(tl = nfsm_dissect(&info, 2 * NFSX_UNSIGNED)); |
| 771 | off = fxdr_hyper(tl); |
| 772 | } else { |
| 773 | NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED)); |
| 774 | off = (off_t)fxdr_unsigned(u_int32_t, *tl); |
| 775 | } |
| 776 | NEGREPLYOUT(reqlen = nfsm_srvstrsiz(&info, |
| 777 | NFS_SRVMAXDATA(nfsd), &error)); |
| 778 | |
| 779 | /* |
| 780 | * Reference vp. If an error occurs, vp will be invalid, but we |
| 781 | * have to NULL it just in case. The macros might goto nfsmout |
| 782 | * as well. |
| 783 | */ |
| 784 | |
| 785 | error = nfsrv_fhtovp(fhp, 1, &mp, &vp, cred, slp, nam, |
| 786 | &rdonly, (nfsd->nd_flag & ND_KERBAUTH), TRUE); |
| 787 | if (error) { |
| 788 | vp = NULL; |
| 789 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, |
| 790 | 2 * NFSX_UNSIGNED, &error)); |
| 791 | nfsm_srvpostop_attr(&info, nfsd, 1, NULL); |
| 792 | error = 0; |
| 793 | goto nfsmout; |
| 794 | } |
| 795 | |
| 796 | if (vp->v_type != VREG) { |
| 797 | if (info.v3) |
| 798 | error = EINVAL; |
| 799 | else |
| 800 | error = (vp->v_type == VDIR) ? EISDIR : EACCES; |
| 801 | } |
| 802 | if (!error) { |
| 803 | if ((error = nfsrv_access(mp, vp, VREAD, cred, rdonly, td, 1)) != 0) |
| 804 | error = nfsrv_access(mp, vp, VEXEC, cred, rdonly, td, 1); |
| 805 | } |
| 806 | getret = VOP_GETATTR(vp, vap); |
| 807 | if (!error) |
| 808 | error = getret; |
| 809 | if (error) { |
| 810 | vput(vp); |
| 811 | vp = NULL; |
| 812 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, |
| 813 | NFSX_POSTOPATTR(info.v3), &error)); |
| 814 | nfsm_srvpostop_attr(&info, nfsd, getret, vap); |
| 815 | error = 0; |
| 816 | goto nfsmout; |
| 817 | } |
| 818 | |
| 819 | /* |
| 820 | * Calculate byte count to read |
| 821 | */ |
| 822 | |
| 823 | if (off >= vap->va_size) |
| 824 | cnt = 0; |
| 825 | else if ((off + reqlen) > vap->va_size) |
| 826 | cnt = vap->va_size - off; |
| 827 | else |
| 828 | cnt = reqlen; |
| 829 | |
| 830 | /* |
| 831 | * Calculate seqcount for heuristic |
| 832 | */ |
| 833 | |
| 834 | { |
| 835 | int hi; |
| 836 | int try = 32; |
| 837 | |
| 838 | /* |
| 839 | * Locate best candidate |
| 840 | */ |
| 841 | |
| 842 | hi = ((int)(vm_offset_t)vp / sizeof(struct vnode)) % NUM_HEURISTIC; |
| 843 | nh = &nfsheur[hi]; |
| 844 | |
| 845 | while (try--) { |
| 846 | if (nfsheur[hi].nh_vp == vp) { |
| 847 | nh = &nfsheur[hi]; |
| 848 | break; |
| 849 | } |
| 850 | if (nfsheur[hi].nh_use > 0) |
| 851 | --nfsheur[hi].nh_use; |
| 852 | hi = (hi + 1) % NUM_HEURISTIC; |
| 853 | if (nfsheur[hi].nh_use < nh->nh_use) |
| 854 | nh = &nfsheur[hi]; |
| 855 | } |
| 856 | |
| 857 | if (nh->nh_vp != vp) { |
| 858 | nh->nh_vp = vp; |
| 859 | nh->nh_nextr = off; |
| 860 | nh->nh_use = NHUSE_INIT; |
| 861 | if (off == 0) |
| 862 | nh->nh_seqcount = 4; |
| 863 | else |
| 864 | nh->nh_seqcount = 1; |
| 865 | } |
| 866 | |
| 867 | /* |
| 868 | * Calculate heuristic |
| 869 | */ |
| 870 | |
| 871 | if ((off == 0 && nh->nh_seqcount > 0) || off == nh->nh_nextr) { |
| 872 | if (++nh->nh_seqcount > IO_SEQMAX) |
| 873 | nh->nh_seqcount = IO_SEQMAX; |
| 874 | } else if (nh->nh_seqcount > 1) { |
| 875 | nh->nh_seqcount = 1; |
| 876 | } else { |
| 877 | nh->nh_seqcount = 0; |
| 878 | } |
| 879 | nh->nh_use += NHUSE_INC; |
| 880 | if (nh->nh_use > NHUSE_MAX) |
| 881 | nh->nh_use = NHUSE_MAX; |
| 882 | ioflag |= nh->nh_seqcount << IO_SEQSHIFT; |
| 883 | } |
| 884 | |
| 885 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, |
| 886 | NFSX_POSTOPORFATTR(info.v3) + |
| 887 | 3 * NFSX_UNSIGNED + nfsm_rndup(cnt), |
| 888 | &error)); |
| 889 | if (info.v3) { |
| 890 | tl = nfsm_build(&info, NFSX_V3FATTR + 4 * NFSX_UNSIGNED); |
| 891 | *tl++ = nfs_true; |
| 892 | fp = (struct nfs_fattr *)tl; |
| 893 | tl += (NFSX_V3FATTR / sizeof (u_int32_t)); |
| 894 | } else { |
| 895 | tl = nfsm_build(&info, NFSX_V2FATTR + NFSX_UNSIGNED); |
| 896 | fp = (struct nfs_fattr *)tl; |
| 897 | tl += (NFSX_V2FATTR / sizeof (u_int32_t)); |
| 898 | } |
| 899 | len = left = nfsm_rndup(cnt); |
| 900 | if (cnt > 0) { |
| 901 | /* |
| 902 | * Generate the mbuf list with the uio_iov ref. to it. |
| 903 | */ |
| 904 | i = 0; |
| 905 | m = m2 = info.mb; |
| 906 | while (left > 0) { |
| 907 | siz = min(M_TRAILINGSPACE(m), left); |
| 908 | if (siz > 0) { |
| 909 | left -= siz; |
| 910 | i++; |
| 911 | } |
| 912 | if (left > 0) { |
| 913 | m = m_getcl(MB_WAIT, MT_DATA, 0); |
| 914 | m->m_len = 0; |
| 915 | m2->m_next = m; |
| 916 | m2 = m; |
| 917 | } |
| 918 | } |
| 919 | MALLOC(iv, struct iovec *, i * sizeof (struct iovec), |
| 920 | M_TEMP, M_WAITOK); |
| 921 | uiop->uio_iov = iv2 = iv; |
| 922 | m = info.mb; |
| 923 | left = len; |
| 924 | i = 0; |
| 925 | while (left > 0) { |
| 926 | if (m == NULL) |
| 927 | panic("nfsrv_read iov"); |
| 928 | siz = min(M_TRAILINGSPACE(m), left); |
| 929 | if (siz > 0) { |
| 930 | iv->iov_base = mtod(m, caddr_t) + m->m_len; |
| 931 | iv->iov_len = siz; |
| 932 | m->m_len += siz; |
| 933 | left -= siz; |
| 934 | iv++; |
| 935 | i++; |
| 936 | } |
| 937 | m = m->m_next; |
| 938 | } |
| 939 | uiop->uio_iovcnt = i; |
| 940 | uiop->uio_offset = off; |
| 941 | uiop->uio_resid = len; |
| 942 | uiop->uio_rw = UIO_READ; |
| 943 | uiop->uio_segflg = UIO_SYSSPACE; |
| 944 | error = VOP_READ(vp, uiop, IO_NODELOCKED | ioflag, cred); |
| 945 | off = uiop->uio_offset; |
| 946 | nh->nh_nextr = off; |
| 947 | FREE((caddr_t)iv2, M_TEMP); |
| 948 | if (error || (getret = VOP_GETATTR(vp, vap))) { |
| 949 | if (!error) |
| 950 | error = getret; |
| 951 | m_freem(info.mreq); |
| 952 | info.mreq = NULL; |
| 953 | vput(vp); |
| 954 | vp = NULL; |
| 955 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, |
| 956 | NFSX_POSTOPATTR(info.v3), |
| 957 | &error)); |
| 958 | nfsm_srvpostop_attr(&info, nfsd, getret, vap); |
| 959 | error = 0; |
| 960 | goto nfsmout; |
| 961 | } |
| 962 | } else { |
| 963 | uiop->uio_resid = 0; |
| 964 | } |
| 965 | vput(vp); |
| 966 | vp = NULL; |
| 967 | nfsm_srvfattr(nfsd, vap, fp); |
| 968 | tlen = len - uiop->uio_resid; |
| 969 | cnt = cnt < tlen ? cnt : tlen; |
| 970 | tlen = nfsm_rndup(cnt); |
| 971 | if (len != tlen || tlen != cnt) |
| 972 | nfsm_adj(info.mb, len - tlen, tlen - cnt); |
| 973 | if (info.v3) { |
| 974 | *tl++ = txdr_unsigned(cnt); |
| 975 | if (len < reqlen) |
| 976 | *tl++ = nfs_true; |
| 977 | else |
| 978 | *tl++ = nfs_false; |
| 979 | } |
| 980 | *tl = txdr_unsigned(cnt); |
| 981 | nfsmout: |
| 982 | *mrq = info.mreq; |
| 983 | if (vp) |
| 984 | vput(vp); |
| 985 | return(error); |
| 986 | } |
| 987 | |
| 988 | /* |
| 989 | * nfs write service |
| 990 | */ |
| 991 | int |
| 992 | nfsrv_write(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, |
| 993 | struct thread *td, struct mbuf **mrq) |
| 994 | { |
| 995 | struct sockaddr *nam = nfsd->nd_nam; |
| 996 | struct ucred *cred = &nfsd->nd_cr; |
| 997 | struct iovec *ivp; |
| 998 | int i, cnt; |
| 999 | struct mbuf *mp1; |
| 1000 | struct nfs_fattr *fp; |
| 1001 | struct iovec *iv; |
| 1002 | struct vattr va, forat; |
| 1003 | struct vattr *vap = &va; |
| 1004 | u_int32_t *tl; |
| 1005 | int error = 0, rdonly, len, forat_ret = 1; |
| 1006 | int ioflags, aftat_ret = 1, retlen, zeroing, adjust; |
| 1007 | int stable = NFSV3WRITE_FILESYNC; |
| 1008 | struct vnode *vp = NULL; |
| 1009 | struct mount *mp = NULL; |
| 1010 | nfsfh_t nfh; |
| 1011 | fhandle_t *fhp; |
| 1012 | struct uio io, *uiop = &io; |
| 1013 | struct nfsm_info info; |
| 1014 | off_t off; |
| 1015 | |
| 1016 | info.mrep = nfsd->nd_mrep; |
| 1017 | info.mreq = NULL; |
| 1018 | info.md = nfsd->nd_md; |
| 1019 | info.dpos = nfsd->nd_dpos; |
| 1020 | info.v3 = (nfsd->nd_flag & ND_NFSV3); |
| 1021 | |
| 1022 | nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); |
| 1023 | if (info.mrep == NULL) { |
| 1024 | error = 0; |
| 1025 | goto nfsmout; |
| 1026 | } |
| 1027 | fhp = &nfh.fh_generic; |
| 1028 | NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, fhp, &error)); |
| 1029 | if (info.v3) { |
| 1030 | NULLOUT(tl = nfsm_dissect(&info, 5 * NFSX_UNSIGNED)); |
| 1031 | off = fxdr_hyper(tl); |
| 1032 | tl += 3; |
| 1033 | stable = fxdr_unsigned(int, *tl++); |
| 1034 | } else { |
| 1035 | NULLOUT(tl = nfsm_dissect(&info, 4 * NFSX_UNSIGNED)); |
| 1036 | off = (off_t)fxdr_unsigned(u_int32_t, *++tl); |
| 1037 | tl += 2; |
| 1038 | if (nfs_async) |
| 1039 | stable = NFSV3WRITE_UNSTABLE; |
| 1040 | } |
| 1041 | retlen = len = fxdr_unsigned(int32_t, *tl); |
| 1042 | cnt = i = 0; |
| 1043 | |
| 1044 | /* |
| 1045 | * For NFS Version 2, it is not obvious what a write of zero length |
| 1046 | * should do, but I might as well be consistent with Version 3, |
| 1047 | * which is to return ok so long as there are no permission problems. |
| 1048 | */ |
| 1049 | if (len > 0) { |
| 1050 | zeroing = 1; |
| 1051 | mp1 = info.mrep; |
| 1052 | while (mp1) { |
| 1053 | if (mp1 == info.md) { |
| 1054 | zeroing = 0; |
| 1055 | adjust = info.dpos - mtod(mp1, caddr_t); |
| 1056 | mp1->m_len -= adjust; |
| 1057 | if (mp1->m_len > 0 && adjust > 0) |
| 1058 | mp1->m_data += adjust; |
| 1059 | } |
| 1060 | if (zeroing) |
| 1061 | mp1->m_len = 0; |
| 1062 | else if (mp1->m_len > 0) { |
| 1063 | i += mp1->m_len; |
| 1064 | if (i > len) { |
| 1065 | mp1->m_len -= (i - len); |
| 1066 | zeroing = 1; |
| 1067 | } |
| 1068 | if (mp1->m_len > 0) |
| 1069 | cnt++; |
| 1070 | } |
| 1071 | mp1 = mp1->m_next; |
| 1072 | } |
| 1073 | } |
| 1074 | if (len > NFS_MAXDATA || len < 0 || i < len) { |
| 1075 | error = EIO; |
| 1076 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, |
| 1077 | 2 * NFSX_UNSIGNED, &error)); |
| 1078 | nfsm_srvwcc_data(&info, nfsd, forat_ret, &forat, |
| 1079 | aftat_ret, vap); |
| 1080 | error = 0; |
| 1081 | goto nfsmout; |
| 1082 | } |
| 1083 | error = nfsrv_fhtovp(fhp, 1, &mp, &vp, cred, slp, nam, |
| 1084 | &rdonly, (nfsd->nd_flag & ND_KERBAUTH), TRUE); |
| 1085 | if (error) { |
| 1086 | vp = NULL; |
| 1087 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, |
| 1088 | 2 * NFSX_UNSIGNED, &error)); |
| 1089 | nfsm_srvwcc_data(&info, nfsd, forat_ret, &forat, |
| 1090 | aftat_ret, vap); |
| 1091 | error = 0; |
| 1092 | goto nfsmout; |
| 1093 | } |
| 1094 | if (info.v3) |
| 1095 | forat_ret = VOP_GETATTR(vp, &forat); |
| 1096 | if (vp->v_type != VREG) { |
| 1097 | if (info.v3) |
| 1098 | error = EINVAL; |
| 1099 | else |
| 1100 | error = (vp->v_type == VDIR) ? EISDIR : EACCES; |
| 1101 | } |
| 1102 | if (!error) { |
| 1103 | error = nfsrv_access(mp, vp, VWRITE, cred, rdonly, td, 1); |
| 1104 | } |
| 1105 | if (error) { |
| 1106 | vput(vp); |
| 1107 | vp = NULL; |
| 1108 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, |
| 1109 | NFSX_WCCDATA(info.v3), &error)); |
| 1110 | nfsm_srvwcc_data(&info, nfsd, forat_ret, &forat, |
| 1111 | aftat_ret, vap); |
| 1112 | error = 0; |
| 1113 | goto nfsmout; |
| 1114 | } |
| 1115 | |
| 1116 | if (len > 0) { |
| 1117 | MALLOC(ivp, struct iovec *, cnt * sizeof (struct iovec), M_TEMP, |
| 1118 | M_WAITOK); |
| 1119 | uiop->uio_iov = iv = ivp; |
| 1120 | uiop->uio_iovcnt = cnt; |
| 1121 | mp1 = info.mrep; |
| 1122 | while (mp1) { |
| 1123 | if (mp1->m_len > 0) { |
| 1124 | ivp->iov_base = mtod(mp1, caddr_t); |
| 1125 | ivp->iov_len = mp1->m_len; |
| 1126 | ivp++; |
| 1127 | } |
| 1128 | mp1 = mp1->m_next; |
| 1129 | } |
| 1130 | |
| 1131 | /* |
| 1132 | * XXX |
| 1133 | * The IO_METASYNC flag indicates that all metadata (and not just |
| 1134 | * enough to ensure data integrity) mus be written to stable storage |
| 1135 | * synchronously. |
| 1136 | * (IO_METASYNC is not yet implemented in 4.4BSD-Lite.) |
| 1137 | */ |
| 1138 | if (stable == NFSV3WRITE_UNSTABLE) |
| 1139 | ioflags = IO_NODELOCKED; |
| 1140 | else if (stable == NFSV3WRITE_DATASYNC) |
| 1141 | ioflags = (IO_SYNC | IO_NODELOCKED); |
| 1142 | else |
| 1143 | ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); |
| 1144 | uiop->uio_resid = len; |
| 1145 | uiop->uio_rw = UIO_WRITE; |
| 1146 | uiop->uio_segflg = UIO_SYSSPACE; |
| 1147 | uiop->uio_td = NULL; |
| 1148 | uiop->uio_offset = off; |
| 1149 | error = VOP_WRITE(vp, uiop, ioflags, cred); |
| 1150 | nfsstats.srvvop_writes++; |
| 1151 | FREE((caddr_t)iv, M_TEMP); |
| 1152 | } |
| 1153 | aftat_ret = VOP_GETATTR(vp, vap); |
| 1154 | vput(vp); |
| 1155 | vp = NULL; |
| 1156 | if (!error) |
| 1157 | error = aftat_ret; |
| 1158 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, |
| 1159 | NFSX_PREOPATTR(info.v3) + |
| 1160 | NFSX_POSTOPORFATTR(info.v3) + |
| 1161 | 2 * NFSX_UNSIGNED + NFSX_WRITEVERF(info.v3), |
| 1162 | &error)); |
| 1163 | if (info.v3) { |
| 1164 | nfsm_srvwcc_data(&info, nfsd, forat_ret, &forat, |
| 1165 | aftat_ret, vap); |
| 1166 | if (error) { |
| 1167 | error = 0; |
| 1168 | goto nfsmout; |
| 1169 | } |
| 1170 | tl = nfsm_build(&info, 4 * NFSX_UNSIGNED); |
| 1171 | *tl++ = txdr_unsigned(retlen); |
| 1172 | /* |
| 1173 | * If nfs_async is set, then pretend the write was FILESYNC. |
| 1174 | */ |
| 1175 | if (stable == NFSV3WRITE_UNSTABLE && !nfs_async) |
| 1176 | *tl++ = txdr_unsigned(stable); |
| 1177 | else |
| 1178 | *tl++ = txdr_unsigned(NFSV3WRITE_FILESYNC); |
| 1179 | /* |
| 1180 | * Actually, there is no need to txdr these fields, |
| 1181 | * but it may make the values more human readable, |
| 1182 | * for debugging purposes. |
| 1183 | */ |
| 1184 | if (nfsver.tv_sec == 0) |
| 1185 | nfsver = boottime; |
| 1186 | *tl++ = txdr_unsigned(nfsver.tv_sec); |
| 1187 | *tl = txdr_unsigned(nfsver.tv_nsec / 1000); |
| 1188 | } else { |
| 1189 | fp = nfsm_build(&info, NFSX_V2FATTR); |
| 1190 | nfsm_srvfattr(nfsd, vap, fp); |
| 1191 | } |
| 1192 | nfsmout: |
| 1193 | *mrq = info.mreq; |
| 1194 | if (vp) |
| 1195 | vput(vp); |
| 1196 | return(error); |
| 1197 | } |
| 1198 | |
| 1199 | /* |
| 1200 | * NFS write service with write gathering support. Called when |
| 1201 | * nfsrvw_procrastinate > 0. |
| 1202 | * See: Chet Juszczak, "Improving the Write Performance of an NFS Server", |
| 1203 | * in Proc. of the Winter 1994 Usenix Conference, pg. 247-259, San Franscisco, |
| 1204 | * Jan. 1994. |
| 1205 | */ |
| 1206 | int |
| 1207 | nfsrv_writegather(struct nfsrv_descript **ndp, struct nfssvc_sock *slp, |
| 1208 | struct thread *td, struct mbuf **mrq) |
| 1209 | { |
| 1210 | struct iovec *ivp; |
| 1211 | struct nfsrv_descript *wp, *nfsd, *owp, *swp; |
| 1212 | struct nfs_fattr *fp; |
| 1213 | int i; |
| 1214 | struct iovec *iov; |
| 1215 | struct nfsrvw_delayhash *wpp; |
| 1216 | struct ucred *cred; |
| 1217 | struct vattr va, forat; |
| 1218 | u_int32_t *tl; |
| 1219 | int error = 0, rdonly, len, forat_ret = 1; |
| 1220 | int ioflags, aftat_ret = 1, adjust, zeroing; |
| 1221 | struct mbuf *mp1; |
| 1222 | struct vnode *vp = NULL; |
| 1223 | struct mount *mp = NULL; |
| 1224 | struct uio io, *uiop = &io; |
| 1225 | u_quad_t cur_usec; |
| 1226 | struct nfsm_info info; |
| 1227 | |
| 1228 | info.mreq = NULL; |
| 1229 | |
| 1230 | nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); |
| 1231 | #ifndef nolint |
| 1232 | i = 0; |
| 1233 | len = 0; |
| 1234 | #endif |
| 1235 | if (*ndp) { |
| 1236 | nfsd = *ndp; |
| 1237 | *ndp = NULL; |
| 1238 | info.mrep = nfsd->nd_mrep; |
| 1239 | info.mreq = NULL; |
| 1240 | info.md = nfsd->nd_md; |
| 1241 | info.dpos = nfsd->nd_dpos; |
| 1242 | info.v3 = (nfsd->nd_flag & ND_NFSV3); |
| 1243 | cred = &nfsd->nd_cr; |
| 1244 | LIST_INIT(&nfsd->nd_coalesce); |
| 1245 | nfsd->nd_mreq = NULL; |
| 1246 | nfsd->nd_stable = NFSV3WRITE_FILESYNC; |
| 1247 | cur_usec = nfs_curusec(); |
| 1248 | nfsd->nd_time = cur_usec + |
| 1249 | (info.v3 ? nfsrvw_procrastinate_v3 : nfsrvw_procrastinate); |
| 1250 | |
| 1251 | /* |
| 1252 | * Now, get the write header.. |
| 1253 | */ |
| 1254 | NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, &nfsd->nd_fh, &error)); |
| 1255 | if (info.v3) { |
| 1256 | NULLOUT(tl = nfsm_dissect(&info, 5 * NFSX_UNSIGNED)); |
| 1257 | nfsd->nd_off = fxdr_hyper(tl); |
| 1258 | tl += 3; |
| 1259 | nfsd->nd_stable = fxdr_unsigned(int, *tl++); |
| 1260 | } else { |
| 1261 | NULLOUT(tl = nfsm_dissect(&info, 4 * NFSX_UNSIGNED)); |
| 1262 | nfsd->nd_off = (off_t)fxdr_unsigned(u_int32_t, *++tl); |
| 1263 | tl += 2; |
| 1264 | if (nfs_async) |
| 1265 | nfsd->nd_stable = NFSV3WRITE_UNSTABLE; |
| 1266 | } |
| 1267 | len = fxdr_unsigned(int32_t, *tl); |
| 1268 | nfsd->nd_len = len; |
| 1269 | nfsd->nd_eoff = nfsd->nd_off + len; |
| 1270 | |
| 1271 | /* |
| 1272 | * Trim the header out of the mbuf list and trim off any trailing |
| 1273 | * junk so that the mbuf list has only the write data. |
| 1274 | */ |
| 1275 | zeroing = 1; |
| 1276 | i = 0; |
| 1277 | mp1 = info.mrep; |
| 1278 | while (mp1) { |
| 1279 | if (mp1 == info.md) { |
| 1280 | zeroing = 0; |
| 1281 | adjust = info.dpos - mtod(mp1, caddr_t); |
| 1282 | mp1->m_len -= adjust; |
| 1283 | if (mp1->m_len > 0 && adjust > 0) |
| 1284 | mp1->m_data += adjust; |
| 1285 | } |
| 1286 | if (zeroing) |
| 1287 | mp1->m_len = 0; |
| 1288 | else { |
| 1289 | i += mp1->m_len; |
| 1290 | if (i > len) { |
| 1291 | mp1->m_len -= (i - len); |
| 1292 | zeroing = 1; |
| 1293 | } |
| 1294 | } |
| 1295 | mp1 = mp1->m_next; |
| 1296 | } |
| 1297 | if (len > NFS_MAXDATA || len < 0 || i < len) { |
| 1298 | nfsmout: |
| 1299 | m_freem(info.mrep); |
| 1300 | info.mrep = NULL; |
| 1301 | error = EIO; |
| 1302 | nfsm_writereply(&info, nfsd, slp, error, 2 * NFSX_UNSIGNED); |
| 1303 | if (info.v3) { |
| 1304 | nfsm_srvwcc_data(&info, nfsd, forat_ret, &forat, |
| 1305 | aftat_ret, &va); |
| 1306 | } |
| 1307 | nfsd->nd_mreq = info.mreq; |
| 1308 | nfsd->nd_mrep = NULL; |
| 1309 | nfsd->nd_time = 0; |
| 1310 | } |
| 1311 | |
| 1312 | /* |
| 1313 | * Add this entry to the hash and time queues. |
| 1314 | */ |
| 1315 | owp = NULL; |
| 1316 | wp = slp->ns_tq.lh_first; |
| 1317 | while (wp && wp->nd_time < nfsd->nd_time) { |
| 1318 | owp = wp; |
| 1319 | wp = wp->nd_tq.le_next; |
| 1320 | } |
| 1321 | NFS_DPF(WG, ("Q%03x", nfsd->nd_retxid & 0xfff)); |
| 1322 | if (owp) { |
| 1323 | LIST_INSERT_AFTER(owp, nfsd, nd_tq); |
| 1324 | } else { |
| 1325 | LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); |
| 1326 | } |
| 1327 | if (nfsd->nd_mrep) { |
| 1328 | wpp = NWDELAYHASH(slp, nfsd->nd_fh.fh_fid.fid_data); |
| 1329 | owp = NULL; |
| 1330 | wp = wpp->lh_first; |
| 1331 | while (wp && |
| 1332 | bcmp((caddr_t)&nfsd->nd_fh,(caddr_t)&wp->nd_fh,NFSX_V3FH)) { |
| 1333 | owp = wp; |
| 1334 | wp = wp->nd_hash.le_next; |
| 1335 | } |
| 1336 | while (wp && wp->nd_off < nfsd->nd_off && |
| 1337 | !bcmp((caddr_t)&nfsd->nd_fh,(caddr_t)&wp->nd_fh,NFSX_V3FH)) { |
| 1338 | owp = wp; |
| 1339 | wp = wp->nd_hash.le_next; |
| 1340 | } |
| 1341 | if (owp) { |
| 1342 | LIST_INSERT_AFTER(owp, nfsd, nd_hash); |
| 1343 | |
| 1344 | /* |
| 1345 | * Search the hash list for overlapping entries and |
| 1346 | * coalesce. |
| 1347 | */ |
| 1348 | for(; nfsd && NFSW_CONTIG(owp, nfsd); nfsd = wp) { |
| 1349 | wp = nfsd->nd_hash.le_next; |
| 1350 | if (NFSW_SAMECRED(owp, nfsd)) |
| 1351 | nfsrvw_coalesce(owp, nfsd); |
| 1352 | } |
| 1353 | } else { |
| 1354 | LIST_INSERT_HEAD(wpp, nfsd, nd_hash); |
| 1355 | } |
| 1356 | } |
| 1357 | } |
| 1358 | |
| 1359 | /* |
| 1360 | * Now, do VOP_WRITE()s for any one(s) that need to be done now |
| 1361 | * and generate the associated reply mbuf list(s). |
| 1362 | */ |
| 1363 | loop1: |
| 1364 | cur_usec = nfs_curusec(); |
| 1365 | for (nfsd = slp->ns_tq.lh_first; nfsd; nfsd = owp) { |
| 1366 | owp = nfsd->nd_tq.le_next; |
| 1367 | if (nfsd->nd_time > cur_usec) |
| 1368 | break; |
| 1369 | if (nfsd->nd_mreq) |
| 1370 | continue; |
| 1371 | NFS_DPF(WG, ("P%03x", nfsd->nd_retxid & 0xfff)); |
| 1372 | LIST_REMOVE(nfsd, nd_tq); |
| 1373 | LIST_REMOVE(nfsd, nd_hash); |
| 1374 | info.mrep = nfsd->nd_mrep; |
| 1375 | info.mreq = NULL; |
| 1376 | info.v3 = (nfsd->nd_flag & ND_NFSV3); |
| 1377 | nfsd->nd_mrep = NULL; |
| 1378 | cred = &nfsd->nd_cr; |
| 1379 | forat_ret = aftat_ret = 1; |
| 1380 | error = nfsrv_fhtovp(&nfsd->nd_fh, 1, &mp, &vp, cred, slp, |
| 1381 | nfsd->nd_nam, &rdonly, |
| 1382 | (nfsd->nd_flag & ND_KERBAUTH), TRUE); |
| 1383 | if (!error) { |
| 1384 | if (info.v3) |
| 1385 | forat_ret = VOP_GETATTR(vp, &forat); |
| 1386 | if (vp->v_type != VREG) { |
| 1387 | if (info.v3) |
| 1388 | error = EINVAL; |
| 1389 | else |
| 1390 | error = (vp->v_type == VDIR) ? EISDIR : EACCES; |
| 1391 | } |
| 1392 | } else { |
| 1393 | vp = NULL; |
| 1394 | } |
| 1395 | if (!error) { |
| 1396 | error = nfsrv_access(mp, vp, VWRITE, cred, rdonly, td, 1); |
| 1397 | } |
| 1398 | |
| 1399 | if (nfsd->nd_stable == NFSV3WRITE_UNSTABLE) |
| 1400 | ioflags = IO_NODELOCKED; |
| 1401 | else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC) |
| 1402 | ioflags = (IO_SYNC | IO_NODELOCKED); |
| 1403 | else |
| 1404 | ioflags = (IO_METASYNC | IO_SYNC | IO_NODELOCKED); |
| 1405 | uiop->uio_rw = UIO_WRITE; |
| 1406 | uiop->uio_segflg = UIO_SYSSPACE; |
| 1407 | uiop->uio_td = NULL; |
| 1408 | uiop->uio_offset = nfsd->nd_off; |
| 1409 | uiop->uio_resid = nfsd->nd_eoff - nfsd->nd_off; |
| 1410 | if (uiop->uio_resid > 0) { |
| 1411 | mp1 = info.mrep; |
| 1412 | i = 0; |
| 1413 | while (mp1) { |
| 1414 | if (mp1->m_len > 0) |
| 1415 | i++; |
| 1416 | mp1 = mp1->m_next; |
| 1417 | } |
| 1418 | uiop->uio_iovcnt = i; |
| 1419 | MALLOC(iov, struct iovec *, i * sizeof (struct iovec), |
| 1420 | M_TEMP, M_WAITOK); |
| 1421 | uiop->uio_iov = ivp = iov; |
| 1422 | mp1 = info.mrep; |
| 1423 | while (mp1) { |
| 1424 | if (mp1->m_len > 0) { |
| 1425 | ivp->iov_base = mtod(mp1, caddr_t); |
| 1426 | ivp->iov_len = mp1->m_len; |
| 1427 | ivp++; |
| 1428 | } |
| 1429 | mp1 = mp1->m_next; |
| 1430 | } |
| 1431 | if (!error) { |
| 1432 | error = VOP_WRITE(vp, uiop, ioflags, cred); |
| 1433 | nfsstats.srvvop_writes++; |
| 1434 | } |
| 1435 | FREE((caddr_t)iov, M_TEMP); |
| 1436 | } |
| 1437 | m_freem(info.mrep); |
| 1438 | info.mrep = NULL; |
| 1439 | if (vp) { |
| 1440 | aftat_ret = VOP_GETATTR(vp, &va); |
| 1441 | vput(vp); |
| 1442 | vp = NULL; |
| 1443 | } |
| 1444 | |
| 1445 | /* |
| 1446 | * Loop around generating replies for all write rpcs that have |
| 1447 | * now been completed. |
| 1448 | */ |
| 1449 | swp = nfsd; |
| 1450 | do { |
| 1451 | NFS_DPF(WG, ("R%03x", nfsd->nd_retxid & 0xfff)); |
| 1452 | if (error) { |
| 1453 | nfsm_writereply(&info, nfsd, slp, error, |
| 1454 | NFSX_WCCDATA(info.v3)); |
| 1455 | if (info.v3) { |
| 1456 | nfsm_srvwcc_data(&info, nfsd, forat_ret, &forat, |
| 1457 | aftat_ret, &va); |
| 1458 | } |
| 1459 | } else { |
| 1460 | nfsm_writereply(&info, nfsd, slp, error, |
| 1461 | NFSX_PREOPATTR(info.v3) + |
| 1462 | NFSX_POSTOPORFATTR(info.v3) + |
| 1463 | 2 * NFSX_UNSIGNED + |
| 1464 | NFSX_WRITEVERF(info.v3)); |
| 1465 | if (info.v3) { |
| 1466 | nfsm_srvwcc_data(&info, nfsd, forat_ret, &forat, |
| 1467 | aftat_ret, &va); |
| 1468 | tl = nfsm_build(&info, 4 * NFSX_UNSIGNED); |
| 1469 | *tl++ = txdr_unsigned(nfsd->nd_len); |
| 1470 | *tl++ = txdr_unsigned(swp->nd_stable); |
| 1471 | /* |
| 1472 | * Actually, there is no need to txdr these fields, |
| 1473 | * but it may make the values more human readable, |
| 1474 | * for debugging purposes. |
| 1475 | */ |
| 1476 | if (nfsver.tv_sec == 0) |
| 1477 | nfsver = boottime; |
| 1478 | *tl++ = txdr_unsigned(nfsver.tv_sec); |
| 1479 | *tl = txdr_unsigned(nfsver.tv_nsec / 1000); |
| 1480 | } else { |
| 1481 | fp = nfsm_build(&info, NFSX_V2FATTR); |
| 1482 | nfsm_srvfattr(nfsd, &va, fp); |
| 1483 | } |
| 1484 | } |
| 1485 | nfsd->nd_mreq = info.mreq; |
| 1486 | if (nfsd->nd_mrep) |
| 1487 | panic("nfsrv_write: nd_mrep not free"); |
| 1488 | |
| 1489 | /* |
| 1490 | * Done. Put it at the head of the timer queue so that |
| 1491 | * the final phase can return the reply. |
| 1492 | */ |
| 1493 | if (nfsd != swp) { |
| 1494 | nfsd->nd_time = 0; |
| 1495 | LIST_INSERT_HEAD(&slp->ns_tq, nfsd, nd_tq); |
| 1496 | } |
| 1497 | nfsd = swp->nd_coalesce.lh_first; |
| 1498 | if (nfsd) { |
| 1499 | LIST_REMOVE(nfsd, nd_tq); |
| 1500 | } |
| 1501 | } while (nfsd); |
| 1502 | swp->nd_time = 0; |
| 1503 | LIST_INSERT_HEAD(&slp->ns_tq, swp, nd_tq); |
| 1504 | goto loop1; |
| 1505 | } |
| 1506 | |
| 1507 | /* |
| 1508 | * Search for a reply to return. |
| 1509 | */ |
| 1510 | for (nfsd = slp->ns_tq.lh_first; nfsd; nfsd = nfsd->nd_tq.le_next) { |
| 1511 | if (nfsd->nd_mreq) { |
| 1512 | NFS_DPF(WG, ("X%03x", nfsd->nd_retxid & 0xfff)); |
| 1513 | LIST_REMOVE(nfsd, nd_tq); |
| 1514 | break; |
| 1515 | } |
| 1516 | } |
| 1517 | if (nfsd) { |
| 1518 | *ndp = nfsd; |
| 1519 | *mrq = nfsd->nd_mreq; |
| 1520 | } else { |
| 1521 | *ndp = NULL; |
| 1522 | *mrq = NULL; |
| 1523 | } |
| 1524 | return (0); |
| 1525 | } |
| 1526 | |
| 1527 | /* |
| 1528 | * Coalesce the write request nfsd into owp. To do this we must: |
| 1529 | * - remove nfsd from the queues |
| 1530 | * - merge nfsd->nd_mrep into owp->nd_mrep |
| 1531 | * - update the nd_eoff and nd_stable for owp |
| 1532 | * - put nfsd on owp's nd_coalesce list |
| 1533 | * NB: Must be called at splsoftclock(). |
| 1534 | */ |
| 1535 | static void |
| 1536 | nfsrvw_coalesce(struct nfsrv_descript *owp, struct nfsrv_descript *nfsd) |
| 1537 | { |
| 1538 | int overlap; |
| 1539 | struct mbuf *mp1; |
| 1540 | struct nfsrv_descript *p; |
| 1541 | |
| 1542 | NFS_DPF(WG, ("C%03x-%03x", |
| 1543 | nfsd->nd_retxid & 0xfff, owp->nd_retxid & 0xfff)); |
| 1544 | LIST_REMOVE(nfsd, nd_hash); |
| 1545 | LIST_REMOVE(nfsd, nd_tq); |
| 1546 | if (owp->nd_eoff < nfsd->nd_eoff) { |
| 1547 | overlap = owp->nd_eoff - nfsd->nd_off; |
| 1548 | if (overlap < 0) |
| 1549 | panic("nfsrv_coalesce: bad off"); |
| 1550 | if (overlap > 0) |
| 1551 | m_adj(nfsd->nd_mrep, overlap); |
| 1552 | mp1 = owp->nd_mrep; |
| 1553 | while (mp1->m_next) |
| 1554 | mp1 = mp1->m_next; |
| 1555 | mp1->m_next = nfsd->nd_mrep; |
| 1556 | owp->nd_eoff = nfsd->nd_eoff; |
| 1557 | } else |
| 1558 | m_freem(nfsd->nd_mrep); |
| 1559 | nfsd->nd_mrep = NULL; |
| 1560 | if (nfsd->nd_stable == NFSV3WRITE_FILESYNC) |
| 1561 | owp->nd_stable = NFSV3WRITE_FILESYNC; |
| 1562 | else if (nfsd->nd_stable == NFSV3WRITE_DATASYNC && |
| 1563 | owp->nd_stable == NFSV3WRITE_UNSTABLE) |
| 1564 | owp->nd_stable = NFSV3WRITE_DATASYNC; |
| 1565 | LIST_INSERT_HEAD(&owp->nd_coalesce, nfsd, nd_tq); |
| 1566 | |
| 1567 | /* |
| 1568 | * If nfsd had anything else coalesced into it, transfer them |
| 1569 | * to owp, otherwise their replies will never get sent. |
| 1570 | */ |
| 1571 | for (p = nfsd->nd_coalesce.lh_first; p; |
| 1572 | p = nfsd->nd_coalesce.lh_first) { |
| 1573 | LIST_REMOVE(p, nd_tq); |
| 1574 | LIST_INSERT_HEAD(&owp->nd_coalesce, p, nd_tq); |
| 1575 | } |
| 1576 | } |
| 1577 | |
| 1578 | /* |
| 1579 | * nfs create service |
| 1580 | * now does a truncate to 0 length via. setattr if it already exists |
| 1581 | */ |
| 1582 | int |
| 1583 | nfsrv_create(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, |
| 1584 | struct thread *td, struct mbuf **mrq) |
| 1585 | { |
| 1586 | struct sockaddr *nam = nfsd->nd_nam; |
| 1587 | struct ucred *cred = &nfsd->nd_cr; |
| 1588 | struct nfs_fattr *fp; |
| 1589 | struct vattr va, dirfor, diraft; |
| 1590 | struct vattr *vap = &va; |
| 1591 | struct nfsv2_sattr *sp; |
| 1592 | u_int32_t *tl; |
| 1593 | struct nlookupdata nd; |
| 1594 | int error = 0, len, tsize, dirfor_ret = 1, diraft_ret = 1; |
| 1595 | udev_t rdev = NOUDEV; |
| 1596 | caddr_t cp; |
| 1597 | int how, exclusive_flag = 0; |
| 1598 | struct vnode *dirp; |
| 1599 | struct vnode *dvp; |
| 1600 | struct vnode *vp; |
| 1601 | struct mount *mp; |
| 1602 | nfsfh_t nfh; |
| 1603 | fhandle_t *fhp; |
| 1604 | u_quad_t tempsize; |
| 1605 | u_char cverf[NFSX_V3CREATEVERF]; |
| 1606 | struct nfsm_info info; |
| 1607 | |
| 1608 | nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); |
| 1609 | nlookup_zero(&nd); |
| 1610 | dirp = NULL; |
| 1611 | dvp = NULL; |
| 1612 | vp = NULL; |
| 1613 | |
| 1614 | info.mrep = nfsd->nd_mrep; |
| 1615 | info.mreq = NULL; |
| 1616 | info.md = nfsd->nd_md; |
| 1617 | info.dpos = nfsd->nd_dpos; |
| 1618 | info.v3 = (nfsd->nd_flag & ND_NFSV3); |
| 1619 | |
| 1620 | fhp = &nfh.fh_generic; |
| 1621 | NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, fhp, &error)); |
| 1622 | NEGREPLYOUT(len = nfsm_srvnamesiz(&info, &error)); |
| 1623 | |
| 1624 | /* |
| 1625 | * Call namei and do initial cleanup to get a few things |
| 1626 | * out of the way. If we get an initial error we cleanup |
| 1627 | * and return here to avoid special-casing the invalid nd |
| 1628 | * structure through the rest of the case. dirp may be |
| 1629 | * set even if an error occurs, but the nd structure will not |
| 1630 | * be valid at all if an error occurs so we have to invalidate it |
| 1631 | * prior to calling nfsm_reply ( which might goto nfsmout ). |
| 1632 | */ |
| 1633 | error = nfs_namei(&nd, cred, NLC_CREATE, &dvp, &vp, |
| 1634 | fhp, len, slp, nam, &info.md, &info.dpos, &dirp, |
| 1635 | td, (nfsd->nd_flag & ND_KERBAUTH), FALSE); |
| 1636 | mp = vfs_getvfs(&fhp->fh_fsid); |
| 1637 | |
| 1638 | if (dirp) { |
| 1639 | if (info.v3) { |
| 1640 | dirfor_ret = VOP_GETATTR(dirp, &dirfor); |
| 1641 | } else { |
| 1642 | vrele(dirp); |
| 1643 | dirp = NULL; |
| 1644 | } |
| 1645 | } |
| 1646 | if (error) { |
| 1647 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, |
| 1648 | NFSX_WCCDATA(info.v3), &error)); |
| 1649 | nfsm_srvwcc_data(&info, nfsd, dirfor_ret, &dirfor, |
| 1650 | diraft_ret, &diraft); |
| 1651 | error = 0; |
| 1652 | goto nfsmout; |
| 1653 | } |
| 1654 | |
| 1655 | /* |
| 1656 | * No error. Continue. State: |
| 1657 | * |
| 1658 | * dirp may be valid |
| 1659 | * vp may be valid or NULL if the target does not |
| 1660 | * exist. |
| 1661 | * dvp is valid |
| 1662 | * |
| 1663 | * The error state is set through the code and we may also do some |
| 1664 | * opportunistic releasing of vnodes to avoid holding locks through |
| 1665 | * NFS I/O. The cleanup at the end is a catch-all |
| 1666 | */ |
| 1667 | |
| 1668 | VATTR_NULL(vap); |
| 1669 | if (info.v3) { |
| 1670 | NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED)); |
| 1671 | how = fxdr_unsigned(int, *tl); |
| 1672 | switch (how) { |
| 1673 | case NFSV3CREATE_GUARDED: |
| 1674 | if (vp) { |
| 1675 | error = EEXIST; |
| 1676 | break; |
| 1677 | } |
| 1678 | /* fall through */ |
| 1679 | case NFSV3CREATE_UNCHECKED: |
| 1680 | ERROROUT(nfsm_srvsattr(&info, vap)); |
| 1681 | break; |
| 1682 | case NFSV3CREATE_EXCLUSIVE: |
| 1683 | NULLOUT(cp = nfsm_dissect(&info, NFSX_V3CREATEVERF)); |
| 1684 | bcopy(cp, cverf, NFSX_V3CREATEVERF); |
| 1685 | exclusive_flag = 1; |
| 1686 | break; |
| 1687 | }; |
| 1688 | vap->va_type = VREG; |
| 1689 | } else { |
| 1690 | NULLOUT(sp = nfsm_dissect(&info, NFSX_V2SATTR)); |
| 1691 | vap->va_type = IFTOVT(fxdr_unsigned(u_int32_t, sp->sa_mode)); |
| 1692 | if (vap->va_type == VNON) |
| 1693 | vap->va_type = VREG; |
| 1694 | vap->va_mode = nfstov_mode(sp->sa_mode); |
| 1695 | switch (vap->va_type) { |
| 1696 | case VREG: |
| 1697 | tsize = fxdr_unsigned(int32_t, sp->sa_size); |
| 1698 | if (tsize != -1) |
| 1699 | vap->va_size = (u_quad_t)tsize; |
| 1700 | break; |
| 1701 | case VCHR: |
| 1702 | case VBLK: |
| 1703 | case VFIFO: |
| 1704 | rdev = fxdr_unsigned(long, sp->sa_size); |
| 1705 | break; |
| 1706 | default: |
| 1707 | break; |
| 1708 | }; |
| 1709 | } |
| 1710 | |
| 1711 | /* |
| 1712 | * Iff doesn't exist, create it |
| 1713 | * otherwise just truncate to 0 length |
| 1714 | * should I set the mode too ? |
| 1715 | * |
| 1716 | * The only possible error we can have at this point is EEXIST. |
| 1717 | * nd.ni_vp will also be non-NULL in that case. |
| 1718 | */ |
| 1719 | if (vp == NULL) { |
| 1720 | if (vap->va_mode == (mode_t)VNOVAL) |
| 1721 | vap->va_mode = 0; |
| 1722 | if (vap->va_type == VREG || vap->va_type == VSOCK) { |
| 1723 | vn_unlock(dvp); |
| 1724 | error = VOP_NCREATE(&nd.nl_nch, dvp, &vp, |
| 1725 | nd.nl_cred, vap); |
| 1726 | vrele(dvp); |
| 1727 | dvp = NULL; |
| 1728 | if (error == 0) { |
| 1729 | if (exclusive_flag) { |
| 1730 | exclusive_flag = 0; |
| 1731 | VATTR_NULL(vap); |
| 1732 | bcopy(cverf, (caddr_t)&vap->va_atime, |
| 1733 | NFSX_V3CREATEVERF); |
| 1734 | error = VOP_SETATTR(vp, vap, cred); |
| 1735 | } |
| 1736 | } |
| 1737 | } else if ( |
| 1738 | vap->va_type == VCHR || |
| 1739 | vap->va_type == VBLK || |
| 1740 | vap->va_type == VFIFO |
| 1741 | ) { |
| 1742 | /* |
| 1743 | * Handle SysV FIFO node special cases. All other |
| 1744 | * devices require super user to access. |
| 1745 | */ |
| 1746 | if (vap->va_type == VCHR && rdev == 0xffffffff) |
| 1747 | vap->va_type = VFIFO; |
| 1748 | if (vap->va_type != VFIFO && |
| 1749 | (error = priv_check_cred(cred, PRIV_ROOT, 0))) { |
| 1750 | goto nfsmreply0; |
| 1751 | } |
| 1752 | vap->va_rmajor = umajor(rdev); |
| 1753 | vap->va_rminor = uminor(rdev); |
| 1754 | |
| 1755 | vn_unlock(dvp); |
| 1756 | error = VOP_NMKNOD(&nd.nl_nch, dvp, &vp, nd.nl_cred, vap); |
| 1757 | vrele(dvp); |
| 1758 | dvp = NULL; |
| 1759 | if (error) |
| 1760 | goto nfsmreply0; |
| 1761 | #if 0 |
| 1762 | /* |
| 1763 | * XXX what is this junk supposed to do ? |
| 1764 | */ |
| 1765 | |
| 1766 | vput(vp); |
| 1767 | vp = NULL; |
| 1768 | |
| 1769 | /* |
| 1770 | * release dvp prior to lookup |
| 1771 | */ |
| 1772 | vput(dvp); |
| 1773 | dvp = NULL; |
| 1774 | |
| 1775 | /* |
| 1776 | * Setup for lookup. |
| 1777 | * |
| 1778 | * Even though LOCKPARENT was cleared, ni_dvp may |
| 1779 | * be garbage. |
| 1780 | */ |
| 1781 | nd.ni_cnd.cn_nameiop = NAMEI_LOOKUP; |
| 1782 | nd.ni_cnd.cn_flags &= ~(CNP_LOCKPARENT); |
| 1783 | nd.ni_cnd.cn_td = td; |
| 1784 | nd.ni_cnd.cn_cred = cred; |
| 1785 | |
| 1786 | error = lookup(&nd); |
| 1787 | nd.ni_dvp = NULL; |
| 1788 | |
| 1789 | if (error != 0) { |
| 1790 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, |
| 1791 | 0, &error)); |
| 1792 | /* fall through on certain errors */ |
| 1793 | } |
| 1794 | nfsrv_object_create(nd.ni_vp); |
| 1795 | if (nd.ni_cnd.cn_flags & CNP_ISSYMLINK) { |
| 1796 | error = EINVAL; |
| 1797 | goto nfsmreply0; |
| 1798 | } |
| 1799 | #endif |
| 1800 | } else { |
| 1801 | error = ENXIO; |
| 1802 | } |
| 1803 | } else { |
| 1804 | if (vap->va_size != -1) { |
| 1805 | error = nfsrv_access(mp, vp, VWRITE, cred, |
| 1806 | (nd.nl_flags & NLC_NFS_RDONLY), td, 0); |
| 1807 | if (!error) { |
| 1808 | tempsize = vap->va_size; |
| 1809 | VATTR_NULL(vap); |
| 1810 | vap->va_size = tempsize; |
| 1811 | error = VOP_SETATTR(vp, vap, cred); |
| 1812 | } |
| 1813 | } |
| 1814 | } |
| 1815 | |
| 1816 | if (!error) { |
| 1817 | bzero(&fhp->fh_fid, sizeof(fhp->fh_fid)); |
| 1818 | error = VFS_VPTOFH(vp, &fhp->fh_fid); |
| 1819 | if (!error) |
| 1820 | error = VOP_GETATTR(vp, vap); |
| 1821 | } |
| 1822 | if (info.v3) { |
| 1823 | if (exclusive_flag && !error && |
| 1824 | bcmp(cverf, (caddr_t)&vap->va_atime, NFSX_V3CREATEVERF)) |
| 1825 | error = EEXIST; |
| 1826 | diraft_ret = VOP_GETATTR(dirp, &diraft); |
| 1827 | vrele(dirp); |
| 1828 | dirp = NULL; |
| 1829 | } |
| 1830 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, |
| 1831 | NFSX_SRVFH(info.v3) + NFSX_FATTR(info.v3) + |
| 1832 | NFSX_WCCDATA(info.v3), |
| 1833 | &error)); |
| 1834 | if (info.v3) { |
| 1835 | if (!error) { |
| 1836 | nfsm_srvpostop_fh(&info, fhp); |
| 1837 | nfsm_srvpostop_attr(&info, nfsd, 0, vap); |
| 1838 | } |
| 1839 | nfsm_srvwcc_data(&info, nfsd, dirfor_ret, &dirfor, |
| 1840 | diraft_ret, &diraft); |
| 1841 | error = 0; |
| 1842 | } else { |
| 1843 | nfsm_srvfhtom(&info, fhp); |
| 1844 | fp = nfsm_build(&info, NFSX_V2FATTR); |
| 1845 | nfsm_srvfattr(nfsd, vap, fp); |
| 1846 | } |
| 1847 | goto nfsmout; |
| 1848 | |
| 1849 | nfsmreply0: |
| 1850 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, 0, &error)); |
| 1851 | error = 0; |
| 1852 | /* fall through */ |
| 1853 | |
| 1854 | nfsmout: |
| 1855 | *mrq = info.mreq; |
| 1856 | if (dirp) |
| 1857 | vrele(dirp); |
| 1858 | nlookup_done(&nd); |
| 1859 | if (dvp) { |
| 1860 | if (dvp == vp) |
| 1861 | vrele(dvp); |
| 1862 | else |
| 1863 | vput(dvp); |
| 1864 | } |
| 1865 | if (vp) |
| 1866 | vput(vp); |
| 1867 | return (error); |
| 1868 | } |
| 1869 | |
| 1870 | /* |
| 1871 | * nfs v3 mknod service |
| 1872 | */ |
| 1873 | int |
| 1874 | nfsrv_mknod(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, |
| 1875 | struct thread *td, struct mbuf **mrq) |
| 1876 | { |
| 1877 | struct sockaddr *nam = nfsd->nd_nam; |
| 1878 | struct ucred *cred = &nfsd->nd_cr; |
| 1879 | struct vattr va, dirfor, diraft; |
| 1880 | struct vattr *vap = &va; |
| 1881 | u_int32_t *tl; |
| 1882 | struct nlookupdata nd; |
| 1883 | int error = 0, len, dirfor_ret = 1, diraft_ret = 1; |
| 1884 | enum vtype vtyp; |
| 1885 | struct vnode *dirp; |
| 1886 | struct vnode *dvp; |
| 1887 | struct vnode *vp; |
| 1888 | nfsfh_t nfh; |
| 1889 | fhandle_t *fhp; |
| 1890 | struct nfsm_info info; |
| 1891 | |
| 1892 | nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); |
| 1893 | nlookup_zero(&nd); |
| 1894 | dirp = NULL; |
| 1895 | dvp = NULL; |
| 1896 | vp = NULL; |
| 1897 | |
| 1898 | info.mrep = nfsd->nd_mrep; |
| 1899 | info.mreq = NULL; |
| 1900 | info.md = nfsd->nd_md; |
| 1901 | info.dpos = nfsd->nd_dpos; |
| 1902 | |
| 1903 | fhp = &nfh.fh_generic; |
| 1904 | NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, fhp, &error)); |
| 1905 | NEGREPLYOUT(len = nfsm_srvnamesiz(&info, &error)); |
| 1906 | |
| 1907 | /* |
| 1908 | * Handle nfs_namei() call. If an error occurs, the nd structure |
| 1909 | * is not valid. However, nfsm_*() routines may still jump to |
| 1910 | * nfsmout. |
| 1911 | */ |
| 1912 | |
| 1913 | error = nfs_namei(&nd, cred, NLC_CREATE, &dvp, &vp, |
| 1914 | fhp, len, slp, nam, &info.md, &info.dpos, &dirp, |
| 1915 | td, (nfsd->nd_flag & ND_KERBAUTH), FALSE); |
| 1916 | if (dirp) |
| 1917 | dirfor_ret = VOP_GETATTR(dirp, &dirfor); |
| 1918 | if (error) { |
| 1919 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, |
| 1920 | NFSX_WCCDATA(1), &error)); |
| 1921 | nfsm_srvwcc_data(&info, nfsd, dirfor_ret, &dirfor, |
| 1922 | diraft_ret, &diraft); |
| 1923 | error = 0; |
| 1924 | goto nfsmout; |
| 1925 | } |
| 1926 | NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED)); |
| 1927 | vtyp = nfsv3tov_type(*tl); |
| 1928 | if (vtyp != VCHR && vtyp != VBLK && vtyp != VSOCK && vtyp != VFIFO) { |
| 1929 | error = NFSERR_BADTYPE; |
| 1930 | goto out; |
| 1931 | } |
| 1932 | VATTR_NULL(vap); |
| 1933 | ERROROUT(nfsm_srvsattr(&info, vap)); |
| 1934 | if (vtyp == VCHR || vtyp == VBLK) { |
| 1935 | NULLOUT(tl = nfsm_dissect(&info, 2 * NFSX_UNSIGNED)); |
| 1936 | vap->va_rmajor = fxdr_unsigned(u_int32_t, *tl++); |
| 1937 | vap->va_rminor = fxdr_unsigned(u_int32_t, *tl); |
| 1938 | } |
| 1939 | |
| 1940 | /* |
| 1941 | * Iff doesn't exist, create it. |
| 1942 | */ |
| 1943 | if (vp) { |
| 1944 | error = EEXIST; |
| 1945 | goto out; |
| 1946 | } |
| 1947 | vap->va_type = vtyp; |
| 1948 | if (vap->va_mode == (mode_t)VNOVAL) |
| 1949 | vap->va_mode = 0; |
| 1950 | if (vtyp == VSOCK) { |
| 1951 | vn_unlock(dvp); |
| 1952 | error = VOP_NCREATE(&nd.nl_nch, dvp, &vp, nd.nl_cred, vap); |
| 1953 | vrele(dvp); |
| 1954 | dvp = NULL; |
| 1955 | } else { |
| 1956 | if (vtyp != VFIFO && (error = priv_check_cred(cred, PRIV_ROOT, 0))) |
| 1957 | goto out; |
| 1958 | |
| 1959 | vn_unlock(dvp); |
| 1960 | error = VOP_NMKNOD(&nd.nl_nch, dvp, &vp, nd.nl_cred, vap); |
| 1961 | vrele(dvp); |
| 1962 | dvp = NULL; |
| 1963 | if (error) |
| 1964 | goto out; |
| 1965 | } |
| 1966 | |
| 1967 | /* |
| 1968 | * send response, cleanup, return. |
| 1969 | */ |
| 1970 | out: |
| 1971 | nlookup_done(&nd); |
| 1972 | if (dvp) { |
| 1973 | if (dvp == vp) |
| 1974 | vrele(dvp); |
| 1975 | else |
| 1976 | vput(dvp); |
| 1977 | dvp = NULL; |
| 1978 | } |
| 1979 | if (!error) { |
| 1980 | bzero(&fhp->fh_fid, sizeof(fhp->fh_fid)); |
| 1981 | error = VFS_VPTOFH(vp, &fhp->fh_fid); |
| 1982 | if (!error) |
| 1983 | error = VOP_GETATTR(vp, vap); |
| 1984 | } |
| 1985 | if (vp) { |
| 1986 | vput(vp); |
| 1987 | vp = NULL; |
| 1988 | } |
| 1989 | diraft_ret = VOP_GETATTR(dirp, &diraft); |
| 1990 | if (dirp) { |
| 1991 | vrele(dirp); |
| 1992 | dirp = NULL; |
| 1993 | } |
| 1994 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, |
| 1995 | NFSX_SRVFH(1) + NFSX_POSTOPATTR(1) + |
| 1996 | NFSX_WCCDATA(1), &error)); |
| 1997 | if (!error) { |
| 1998 | nfsm_srvpostop_fh(&info, fhp); |
| 1999 | nfsm_srvpostop_attr(&info, nfsd, 0, vap); |
| 2000 | } |
| 2001 | nfsm_srvwcc_data(&info, nfsd, dirfor_ret, &dirfor, |
| 2002 | diraft_ret, &diraft); |
| 2003 | *mrq = info.mreq; |
| 2004 | return (0); |
| 2005 | nfsmout: |
| 2006 | *mrq = info.mreq; |
| 2007 | if (dirp) |
| 2008 | vrele(dirp); |
| 2009 | nlookup_done(&nd); |
| 2010 | if (dvp) { |
| 2011 | if (dvp == vp) |
| 2012 | vrele(dvp); |
| 2013 | else |
| 2014 | vput(dvp); |
| 2015 | } |
| 2016 | if (vp) |
| 2017 | vput(vp); |
| 2018 | return (error); |
| 2019 | } |
| 2020 | |
| 2021 | /* |
| 2022 | * nfs remove service |
| 2023 | */ |
| 2024 | int |
| 2025 | nfsrv_remove(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, |
| 2026 | struct thread *td, struct mbuf **mrq) |
| 2027 | { |
| 2028 | struct sockaddr *nam = nfsd->nd_nam; |
| 2029 | struct ucred *cred = &nfsd->nd_cr; |
| 2030 | struct nlookupdata nd; |
| 2031 | int error = 0, len, dirfor_ret = 1, diraft_ret = 1; |
| 2032 | struct vnode *dirp; |
| 2033 | struct vnode *dvp; |
| 2034 | struct vnode *vp; |
| 2035 | struct vattr dirfor, diraft; |
| 2036 | nfsfh_t nfh; |
| 2037 | fhandle_t *fhp; |
| 2038 | struct nfsm_info info; |
| 2039 | |
| 2040 | nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); |
| 2041 | nlookup_zero(&nd); |
| 2042 | dirp = NULL; |
| 2043 | dvp = NULL; |
| 2044 | vp = NULL; |
| 2045 | |
| 2046 | info.mrep = nfsd->nd_mrep; |
| 2047 | info.mreq = NULL; |
| 2048 | info.md = nfsd->nd_md; |
| 2049 | info.dpos = nfsd->nd_dpos; |
| 2050 | info.v3 = (nfsd->nd_flag & ND_NFSV3); |
| 2051 | |
| 2052 | fhp = &nfh.fh_generic; |
| 2053 | NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, fhp, &error)); |
| 2054 | NEGREPLYOUT(len = nfsm_srvnamesiz(&info, &error)); |
| 2055 | |
| 2056 | error = nfs_namei(&nd, cred, NLC_DELETE, &dvp, &vp, |
| 2057 | fhp, len, slp, nam, &info.md, &info.dpos, &dirp, |
| 2058 | td, (nfsd->nd_flag & ND_KERBAUTH), FALSE); |
| 2059 | if (dirp) { |
| 2060 | if (info.v3) |
| 2061 | dirfor_ret = VOP_GETATTR(dirp, &dirfor); |
| 2062 | } |
| 2063 | if (error == 0) { |
| 2064 | if (vp->v_type == VDIR) { |
| 2065 | error = EPERM; /* POSIX */ |
| 2066 | goto out; |
| 2067 | } |
| 2068 | /* |
| 2069 | * The root of a mounted filesystem cannot be deleted. |
| 2070 | */ |
| 2071 | if (vp->v_flag & VROOT) { |
| 2072 | error = EBUSY; |
| 2073 | goto out; |
| 2074 | } |
| 2075 | out: |
| 2076 | if (!error) { |
| 2077 | if (dvp != vp) |
| 2078 | vn_unlock(dvp); |
| 2079 | if (vp) { |
| 2080 | vput(vp); |
| 2081 | vp = NULL; |
| 2082 | } |
| 2083 | error = VOP_NREMOVE(&nd.nl_nch, dvp, nd.nl_cred); |
| 2084 | vrele(dvp); |
| 2085 | dvp = NULL; |
| 2086 | } |
| 2087 | } |
| 2088 | if (dirp && info.v3) |
| 2089 | diraft_ret = VOP_GETATTR(dirp, &diraft); |
| 2090 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_WCCDATA(info.v3), &error)); |
| 2091 | if (info.v3) { |
| 2092 | nfsm_srvwcc_data(&info, nfsd, dirfor_ret, &dirfor, |
| 2093 | diraft_ret, &diraft); |
| 2094 | error = 0; |
| 2095 | } |
| 2096 | nfsmout: |
| 2097 | *mrq = info.mreq; |
| 2098 | nlookup_done(&nd); |
| 2099 | if (dirp) |
| 2100 | vrele(dirp); |
| 2101 | if (dvp) { |
| 2102 | if (dvp == vp) |
| 2103 | vrele(dvp); |
| 2104 | else |
| 2105 | vput(dvp); |
| 2106 | } |
| 2107 | if (vp) |
| 2108 | vput(vp); |
| 2109 | return(error); |
| 2110 | } |
| 2111 | |
| 2112 | /* |
| 2113 | * nfs rename service |
| 2114 | */ |
| 2115 | int |
| 2116 | nfsrv_rename(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, |
| 2117 | struct thread *td, struct mbuf **mrq) |
| 2118 | { |
| 2119 | struct sockaddr *nam = nfsd->nd_nam; |
| 2120 | struct ucred *cred = &nfsd->nd_cr; |
| 2121 | int error = 0, len, len2, fdirfor_ret = 1, fdiraft_ret = 1; |
| 2122 | int tdirfor_ret = 1, tdiraft_ret = 1; |
| 2123 | struct nlookupdata fromnd, tond; |
| 2124 | struct vnode *fvp, *fdirp, *fdvp; |
| 2125 | struct vnode *tvp, *tdirp, *tdvp; |
| 2126 | struct namecache *ncp; |
| 2127 | struct vattr fdirfor, fdiraft, tdirfor, tdiraft; |
| 2128 | nfsfh_t fnfh, tnfh; |
| 2129 | fhandle_t *ffhp, *tfhp; |
| 2130 | uid_t saved_uid; |
| 2131 | struct nfsm_info info; |
| 2132 | |
| 2133 | info.mrep = nfsd->nd_mrep; |
| 2134 | info.mreq = NULL; |
| 2135 | info.md = nfsd->nd_md; |
| 2136 | info.dpos = nfsd->nd_dpos; |
| 2137 | info.v3 = (nfsd->nd_flag & ND_NFSV3); |
| 2138 | |
| 2139 | nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); |
| 2140 | #ifndef nolint |
| 2141 | fvp = NULL; |
| 2142 | #endif |
| 2143 | ffhp = &fnfh.fh_generic; |
| 2144 | tfhp = &tnfh.fh_generic; |
| 2145 | |
| 2146 | /* |
| 2147 | * Clear fields incase goto nfsmout occurs from macro. |
| 2148 | */ |
| 2149 | |
| 2150 | nlookup_zero(&fromnd); |
| 2151 | nlookup_zero(&tond); |
| 2152 | fdirp = NULL; |
| 2153 | tdirp = NULL; |
| 2154 | |
| 2155 | NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, ffhp, &error)); |
| 2156 | NEGREPLYOUT(len = nfsm_srvnamesiz(&info, &error)); |
| 2157 | |
| 2158 | /* |
| 2159 | * Remember our original uid so that we can reset cr_uid before |
| 2160 | * the second nfs_namei() call, in case it is remapped. |
| 2161 | */ |
| 2162 | saved_uid = cred->cr_uid; |
| 2163 | error = nfs_namei(&fromnd, cred, NLC_RENAME_SRC, |
| 2164 | NULL, NULL, |
| 2165 | ffhp, len, slp, nam, &info.md, &info.dpos, &fdirp, |
| 2166 | td, (nfsd->nd_flag & ND_KERBAUTH), FALSE); |
| 2167 | if (fdirp) { |
| 2168 | if (info.v3) |
| 2169 | fdirfor_ret = VOP_GETATTR(fdirp, &fdirfor); |
| 2170 | } |
| 2171 | if (error) { |
| 2172 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, |
| 2173 | 2 * NFSX_WCCDATA(info.v3), &error)); |
| 2174 | nfsm_srvwcc_data(&info, nfsd, fdirfor_ret, &fdirfor, |
| 2175 | fdiraft_ret, &fdiraft); |
| 2176 | nfsm_srvwcc_data(&info, nfsd, tdirfor_ret, &tdirfor, |
| 2177 | tdiraft_ret, &tdiraft); |
| 2178 | error = 0; |
| 2179 | goto nfsmout; |
| 2180 | } |
| 2181 | |
| 2182 | /* |
| 2183 | * We have to unlock the from ncp before we can safely lookup |
| 2184 | * the target ncp. |
| 2185 | */ |
| 2186 | KKASSERT(fromnd.nl_flags & NLC_NCPISLOCKED); |
| 2187 | cache_unlock(&fromnd.nl_nch); |
| 2188 | fromnd.nl_flags &= ~NLC_NCPISLOCKED; |
| 2189 | NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, tfhp, &error)); |
| 2190 | NEGATIVEOUT(len2 = nfsm_strsiz(&info, NFS_MAXNAMLEN)); |
| 2191 | cred->cr_uid = saved_uid; |
| 2192 | |
| 2193 | error = nfs_namei(&tond, cred, NLC_RENAME_DST, NULL, NULL, |
| 2194 | tfhp, len2, slp, nam, &info.md, &info.dpos, &tdirp, |
| 2195 | td, (nfsd->nd_flag & ND_KERBAUTH), FALSE); |
| 2196 | if (tdirp) { |
| 2197 | if (info.v3) |
| 2198 | tdirfor_ret = VOP_GETATTR(tdirp, &tdirfor); |
| 2199 | } |
| 2200 | if (error) |
| 2201 | goto out1; |
| 2202 | |
| 2203 | /* |
| 2204 | * relock the source |
| 2205 | */ |
| 2206 | if (cache_lock_nonblock(&fromnd.nl_nch) == 0) { |
| 2207 | cache_resolve(&fromnd.nl_nch, fromnd.nl_cred); |
| 2208 | } else if (fromnd.nl_nch.ncp > tond.nl_nch.ncp) { |
| 2209 | cache_lock(&fromnd.nl_nch); |
| 2210 | cache_resolve(&fromnd.nl_nch, fromnd.nl_cred); |
| 2211 | } else { |
| 2212 | cache_unlock(&tond.nl_nch); |
| 2213 | cache_lock(&fromnd.nl_nch); |
| 2214 | cache_resolve(&fromnd.nl_nch, fromnd.nl_cred); |
| 2215 | cache_lock(&tond.nl_nch); |
| 2216 | cache_resolve(&tond.nl_nch, tond.nl_cred); |
| 2217 | } |
| 2218 | fromnd.nl_flags |= NLC_NCPISLOCKED; |
| 2219 | |
| 2220 | fvp = fromnd.nl_nch.ncp->nc_vp; |
| 2221 | tvp = tond.nl_nch.ncp->nc_vp; |
| 2222 | |
| 2223 | /* |
| 2224 | * Set fdvp and tdvp. We haven't done all the topology checks |
| 2225 | * so these can wind up NULL (e.g. if either fvp or tvp is a mount |
| 2226 | * point). If we get through the checks these will be guarenteed |
| 2227 | * to be non-NULL. |
| 2228 | * |
| 2229 | * Holding the children ncp's should be sufficient to prevent |
| 2230 | * fdvp and tdvp ripouts. |
| 2231 | */ |
| 2232 | if (fromnd.nl_nch.ncp->nc_parent) |
| 2233 | fdvp = fromnd.nl_nch.ncp->nc_parent->nc_vp; |
| 2234 | else |
| 2235 | fdvp = NULL; |
| 2236 | if (tond.nl_nch.ncp->nc_parent) |
| 2237 | tdvp = tond.nl_nch.ncp->nc_parent->nc_vp; |
| 2238 | else |
| 2239 | tdvp = NULL; |
| 2240 | |
| 2241 | if (tvp != NULL) { |
| 2242 | if (fvp->v_type == VDIR && tvp->v_type != VDIR) { |
| 2243 | if (info.v3) |
| 2244 | error = EEXIST; |
| 2245 | else |
| 2246 | error = EISDIR; |
| 2247 | goto out; |
| 2248 | } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { |
| 2249 | if (info.v3) |
| 2250 | error = EEXIST; |
| 2251 | else |
| 2252 | error = ENOTDIR; |
| 2253 | goto out; |
| 2254 | } |
| 2255 | if (tvp->v_type == VDIR && (tond.nl_nch.ncp->nc_flag & NCF_ISMOUNTPT)) { |
| 2256 | if (info.v3) |
| 2257 | error = EXDEV; |
| 2258 | else |
| 2259 | error = ENOTEMPTY; |
| 2260 | goto out; |
| 2261 | } |
| 2262 | } |
| 2263 | if (fvp->v_type == VDIR && (fromnd.nl_nch.ncp->nc_flag & NCF_ISMOUNTPT)) { |
| 2264 | if (info.v3) |
| 2265 | error = EXDEV; |
| 2266 | else |
| 2267 | error = ENOTEMPTY; |
| 2268 | goto out; |
| 2269 | } |
| 2270 | if (fromnd.nl_nch.mount != tond.nl_nch.mount) { |
| 2271 | if (info.v3) |
| 2272 | error = EXDEV; |
| 2273 | else |
| 2274 | error = ENOTEMPTY; |
| 2275 | goto out; |
| 2276 | } |
| 2277 | if (fromnd.nl_nch.ncp == tond.nl_nch.ncp->nc_parent) { |
| 2278 | if (info.v3) |
| 2279 | error = EINVAL; |
| 2280 | else |
| 2281 | error = ENOTEMPTY; |
| 2282 | } |
| 2283 | |
| 2284 | /* |
| 2285 | * You cannot rename a source into itself or a subdirectory of itself. |
| 2286 | * We check this by travsering the target directory upwards looking |
| 2287 | * for a match against the source. |
| 2288 | */ |
| 2289 | if (error == 0) { |
| 2290 | for (ncp = tond.nl_nch.ncp; ncp; ncp = ncp->nc_parent) { |
| 2291 | if (fromnd.nl_nch.ncp == ncp) { |
| 2292 | error = EINVAL; |
| 2293 | break; |
| 2294 | } |
| 2295 | } |
| 2296 | } |
| 2297 | |
| 2298 | /* |
| 2299 | * If source is the same as the destination (that is the |
| 2300 | * same vnode with the same name in the same directory), |
| 2301 | * then there is nothing to do. |
| 2302 | */ |
| 2303 | if (fromnd.nl_nch.ncp == tond.nl_nch.ncp) |
| 2304 | error = -1; |
| 2305 | out: |
| 2306 | if (!error) { |
| 2307 | /* |
| 2308 | * The VOP_NRENAME function releases all vnode references & |
| 2309 | * locks prior to returning so we need to clear the pointers |
| 2310 | * to bypass cleanup code later on. |
| 2311 | */ |
| 2312 | error = VOP_NRENAME(&fromnd.nl_nch, &tond.nl_nch, |
| 2313 | fdvp, tdvp, tond.nl_cred); |
| 2314 | } else { |
| 2315 | if (error == -1) |
| 2316 | error = 0; |
| 2317 | } |
| 2318 | /* fall through */ |
| 2319 | |
| 2320 | out1: |
| 2321 | if (fdirp) |
| 2322 | fdiraft_ret = VOP_GETATTR(fdirp, &fdiraft); |
| 2323 | if (tdirp) |
| 2324 | tdiraft_ret = VOP_GETATTR(tdirp, &tdiraft); |
| 2325 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, |
| 2326 | 2 * NFSX_WCCDATA(info.v3), &error)); |
| 2327 | if (info.v3) { |
| 2328 | nfsm_srvwcc_data(&info, nfsd, fdirfor_ret, &fdirfor, |
| 2329 | fdiraft_ret, &fdiraft); |
| 2330 | nfsm_srvwcc_data(&info, nfsd, tdirfor_ret, &tdirfor, |
| 2331 | tdiraft_ret, &tdiraft); |
| 2332 | } |
| 2333 | error = 0; |
| 2334 | /* fall through */ |
| 2335 | |
| 2336 | nfsmout: |
| 2337 | *mrq = info.mreq; |
| 2338 | if (tdirp) |
| 2339 | vrele(tdirp); |
| 2340 | nlookup_done(&tond); |
| 2341 | if (fdirp) |
| 2342 | vrele(fdirp); |
| 2343 | nlookup_done(&fromnd); |
| 2344 | return (error); |
| 2345 | } |
| 2346 | |
| 2347 | /* |
| 2348 | * nfs link service |
| 2349 | */ |
| 2350 | int |
| 2351 | nfsrv_link(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, |
| 2352 | struct thread *td, struct mbuf **mrq) |
| 2353 | { |
| 2354 | struct sockaddr *nam = nfsd->nd_nam; |
| 2355 | struct ucred *cred = &nfsd->nd_cr; |
| 2356 | struct nlookupdata nd; |
| 2357 | int error = 0, rdonly, len, dirfor_ret = 1, diraft_ret = 1; |
| 2358 | int getret = 1; |
| 2359 | struct vnode *dirp; |
| 2360 | struct vnode *dvp; |
| 2361 | struct vnode *vp; |
| 2362 | struct vnode *xp; |
| 2363 | struct mount *mp; |
| 2364 | struct mount *xmp; |
| 2365 | struct vattr dirfor, diraft, at; |
| 2366 | nfsfh_t nfh, dnfh; |
| 2367 | fhandle_t *fhp, *dfhp; |
| 2368 | struct nfsm_info info; |
| 2369 | |
| 2370 | info.mrep = nfsd->nd_mrep; |
| 2371 | info.mreq = NULL; |
| 2372 | info.md = nfsd->nd_md; |
| 2373 | info.dpos = nfsd->nd_dpos; |
| 2374 | info.v3 = (nfsd->nd_flag & ND_NFSV3); |
| 2375 | |
| 2376 | nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); |
| 2377 | nlookup_zero(&nd); |
| 2378 | dirp = dvp = vp = xp = NULL; |
| 2379 | mp = xmp = NULL; |
| 2380 | |
| 2381 | fhp = &nfh.fh_generic; |
| 2382 | dfhp = &dnfh.fh_generic; |
| 2383 | NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, fhp, &error)); |
| 2384 | NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, dfhp, &error)); |
| 2385 | NEGREPLYOUT(len = nfsm_srvnamesiz(&info, &error)); |
| 2386 | |
| 2387 | error = nfsrv_fhtovp(fhp, FALSE, &xmp, &xp, cred, slp, nam, |
| 2388 | &rdonly, (nfsd->nd_flag & ND_KERBAUTH), TRUE); |
| 2389 | if (error) { |
| 2390 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, |
| 2391 | NFSX_POSTOPATTR(info.v3) + |
| 2392 | NFSX_WCCDATA(info.v3), |
| 2393 | &error)); |
| 2394 | nfsm_srvpostop_attr(&info, nfsd, getret, &at); |
| 2395 | nfsm_srvwcc_data(&info, nfsd, dirfor_ret, &dirfor, |
| 2396 | diraft_ret, &diraft); |
| 2397 | xp = NULL; |
| 2398 | error = 0; |
| 2399 | goto nfsmout; |
| 2400 | } |
| 2401 | if (xp->v_type == VDIR) { |
| 2402 | error = EPERM; /* POSIX */ |
| 2403 | goto out1; |
| 2404 | } |
| 2405 | |
| 2406 | error = nfs_namei(&nd, cred, NLC_CREATE, &dvp, &vp, |
| 2407 | dfhp, len, slp, nam, &info.md, &info.dpos, &dirp, |
| 2408 | td, (nfsd->nd_flag & ND_KERBAUTH), FALSE); |
| 2409 | if (dirp) { |
| 2410 | if (info.v3) |
| 2411 | dirfor_ret = VOP_GETATTR(dirp, &dirfor); |
| 2412 | } |
| 2413 | if (error) |
| 2414 | goto out1; |
| 2415 | |
| 2416 | if (vp != NULL) { |
| 2417 | error = EEXIST; |
| 2418 | goto out; |
| 2419 | } |
| 2420 | if (xp->v_mount != dvp->v_mount) |
| 2421 | error = EXDEV; |
| 2422 | out: |
| 2423 | if (!error) { |
| 2424 | vn_unlock(dvp); |
| 2425 | error = VOP_NLINK(&nd.nl_nch, dvp, xp, nd.nl_cred); |
| 2426 | vrele(dvp); |
| 2427 | dvp = NULL; |
| 2428 | } |
| 2429 | /* fall through */ |
| 2430 | |
| 2431 | out1: |
| 2432 | if (info.v3) |
| 2433 | getret = VOP_GETATTR(xp, &at); |
| 2434 | if (dirp) |
| 2435 | diraft_ret = VOP_GETATTR(dirp, &diraft); |
| 2436 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, |
| 2437 | NFSX_POSTOPATTR(info.v3) + NFSX_WCCDATA(info.v3), |
| 2438 | &error)); |
| 2439 | if (info.v3) { |
| 2440 | nfsm_srvpostop_attr(&info, nfsd, getret, &at); |
| 2441 | nfsm_srvwcc_data(&info, nfsd, dirfor_ret, &dirfor, |
| 2442 | diraft_ret, &diraft); |
| 2443 | error = 0; |
| 2444 | } |
| 2445 | /* fall through */ |
| 2446 | |
| 2447 | nfsmout: |
| 2448 | *mrq = info.mreq; |
| 2449 | nlookup_done(&nd); |
| 2450 | if (dirp) |
| 2451 | vrele(dirp); |
| 2452 | if (xp) |
| 2453 | vrele(xp); |
| 2454 | if (dvp) { |
| 2455 | if (dvp == vp) |
| 2456 | vrele(dvp); |
| 2457 | else |
| 2458 | vput(dvp); |
| 2459 | } |
| 2460 | if (vp) |
| 2461 | vput(vp); |
| 2462 | return(error); |
| 2463 | } |
| 2464 | |
| 2465 | /* |
| 2466 | * nfs symbolic link service |
| 2467 | */ |
| 2468 | int |
| 2469 | nfsrv_symlink(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, |
| 2470 | struct thread *td, struct mbuf **mrq) |
| 2471 | { |
| 2472 | struct sockaddr *nam = nfsd->nd_nam; |
| 2473 | struct ucred *cred = &nfsd->nd_cr; |
| 2474 | struct vattr va, dirfor, diraft; |
| 2475 | struct nlookupdata nd; |
| 2476 | struct vattr *vap = &va; |
| 2477 | struct nfsv2_sattr *sp; |
| 2478 | char *pathcp = NULL; |
| 2479 | struct uio io; |
| 2480 | struct iovec iv; |
| 2481 | int error = 0, len, len2, dirfor_ret = 1, diraft_ret = 1; |
| 2482 | struct vnode *dirp; |
| 2483 | struct vnode *vp; |
| 2484 | struct vnode *dvp; |
| 2485 | nfsfh_t nfh; |
| 2486 | fhandle_t *fhp; |
| 2487 | struct nfsm_info info; |
| 2488 | |
| 2489 | nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); |
| 2490 | nlookup_zero(&nd); |
| 2491 | dirp = NULL; |
| 2492 | dvp = NULL; |
| 2493 | vp = NULL; |
| 2494 | |
| 2495 | info.mrep = nfsd->nd_mrep; |
| 2496 | info.mreq = NULL; |
| 2497 | info.md = nfsd->nd_md; |
| 2498 | info.dpos = nfsd->nd_dpos; |
| 2499 | info.v3 = (nfsd->nd_flag & ND_NFSV3); |
| 2500 | |
| 2501 | fhp = &nfh.fh_generic; |
| 2502 | NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, fhp, &error)); |
| 2503 | NEGREPLYOUT(len = nfsm_srvnamesiz(&info, &error)); |
| 2504 | |
| 2505 | error = nfs_namei(&nd, cred, NLC_CREATE, &dvp, &vp, |
| 2506 | fhp, len, slp, nam, &info.md, &info.dpos, &dirp, |
| 2507 | td, (nfsd->nd_flag & ND_KERBAUTH), FALSE); |
| 2508 | if (dirp) { |
| 2509 | if (info.v3) |
| 2510 | dirfor_ret = VOP_GETATTR(dirp, &dirfor); |
| 2511 | } |
| 2512 | if (error) |
| 2513 | goto out; |
| 2514 | |
| 2515 | VATTR_NULL(vap); |
| 2516 | if (info.v3) { |
| 2517 | ERROROUT(nfsm_srvsattr(&info, vap)); |
| 2518 | } |
| 2519 | NEGATIVEOUT(len2 = nfsm_strsiz(&info, NFS_MAXPATHLEN)); |
| 2520 | MALLOC(pathcp, caddr_t, len2 + 1, M_TEMP, M_WAITOK); |
| 2521 | iv.iov_base = pathcp; |
| 2522 | iv.iov_len = len2; |
| 2523 | io.uio_resid = len2; |
| 2524 | io.uio_offset = 0; |
| 2525 | io.uio_iov = &iv; |
| 2526 | io.uio_iovcnt = 1; |
| 2527 | io.uio_segflg = UIO_SYSSPACE; |
| 2528 | io.uio_rw = UIO_READ; |
| 2529 | io.uio_td = NULL; |
| 2530 | ERROROUT(nfsm_mtouio(&info, &io, len2)); |
| 2531 | if (info.v3 == 0) { |
| 2532 | NULLOUT(sp = nfsm_dissect(&info, NFSX_V2SATTR)); |
| 2533 | vap->va_mode = nfstov_mode(sp->sa_mode); |
| 2534 | } |
| 2535 | *(pathcp + len2) = '\0'; |
| 2536 | if (vp) { |
| 2537 | error = EEXIST; |
| 2538 | goto out; |
| 2539 | } |
| 2540 | |
| 2541 | if (vap->va_mode == (mode_t)VNOVAL) |
| 2542 | vap->va_mode = 0; |
| 2543 | if (dvp != vp) |
| 2544 | vn_unlock(dvp); |
| 2545 | error = VOP_NSYMLINK(&nd.nl_nch, dvp, &vp, nd.nl_cred, vap, pathcp); |
| 2546 | vrele(dvp); |
| 2547 | dvp = NULL; |
| 2548 | if (error == 0) { |
| 2549 | bzero(&fhp->fh_fid, sizeof(fhp->fh_fid)); |
| 2550 | error = VFS_VPTOFH(vp, &fhp->fh_fid); |
| 2551 | if (!error) |
| 2552 | error = VOP_GETATTR(vp, vap); |
| 2553 | } |
| 2554 | |
| 2555 | out: |
| 2556 | if (dvp) { |
| 2557 | if (dvp == vp) |
| 2558 | vrele(dvp); |
| 2559 | else |
| 2560 | vput(dvp); |
| 2561 | } |
| 2562 | if (vp) { |
| 2563 | vput(vp); |
| 2564 | vp = NULL; |
| 2565 | } |
| 2566 | if (pathcp) { |
| 2567 | FREE(pathcp, M_TEMP); |
| 2568 | pathcp = NULL; |
| 2569 | } |
| 2570 | if (dirp) { |
| 2571 | diraft_ret = VOP_GETATTR(dirp, &diraft); |
| 2572 | vrele(dirp); |
| 2573 | dirp = NULL; |
| 2574 | } |
| 2575 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, |
| 2576 | NFSX_SRVFH(info.v3) + NFSX_POSTOPATTR(info.v3) + |
| 2577 | NFSX_WCCDATA(info.v3), |
| 2578 | &error)); |
| 2579 | if (info.v3) { |
| 2580 | if (!error) { |
| 2581 | nfsm_srvpostop_fh(&info, fhp); |
| 2582 | nfsm_srvpostop_attr(&info, nfsd, 0, vap); |
| 2583 | } |
| 2584 | nfsm_srvwcc_data(&info, nfsd, dirfor_ret, &dirfor, |
| 2585 | diraft_ret, &diraft); |
| 2586 | } |
| 2587 | error = 0; |
| 2588 | /* fall through */ |
| 2589 | |
| 2590 | nfsmout: |
| 2591 | *mrq = info.mreq; |
| 2592 | nlookup_done(&nd); |
| 2593 | if (vp) |
| 2594 | vput(vp); |
| 2595 | if (dirp) |
| 2596 | vrele(dirp); |
| 2597 | if (pathcp) |
| 2598 | FREE(pathcp, M_TEMP); |
| 2599 | return (error); |
| 2600 | } |
| 2601 | |
| 2602 | /* |
| 2603 | * nfs mkdir service |
| 2604 | */ |
| 2605 | int |
| 2606 | nfsrv_mkdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, |
| 2607 | struct thread *td, struct mbuf **mrq) |
| 2608 | { |
| 2609 | struct sockaddr *nam = nfsd->nd_nam; |
| 2610 | struct ucred *cred = &nfsd->nd_cr; |
| 2611 | struct vattr va, dirfor, diraft; |
| 2612 | struct vattr *vap = &va; |
| 2613 | struct nfs_fattr *fp; |
| 2614 | struct nlookupdata nd; |
| 2615 | u_int32_t *tl; |
| 2616 | int error = 0, len, dirfor_ret = 1, diraft_ret = 1; |
| 2617 | struct vnode *dirp; |
| 2618 | struct vnode *dvp; |
| 2619 | struct vnode *vp; |
| 2620 | nfsfh_t nfh; |
| 2621 | fhandle_t *fhp; |
| 2622 | struct nfsm_info info; |
| 2623 | |
| 2624 | nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); |
| 2625 | nlookup_zero(&nd); |
| 2626 | dirp = NULL; |
| 2627 | dvp = NULL; |
| 2628 | vp = NULL; |
| 2629 | |
| 2630 | info.dpos = nfsd->nd_dpos; |
| 2631 | info.mrep = nfsd->nd_mrep; |
| 2632 | info.mreq = NULL; |
| 2633 | info.md = nfsd->nd_md; |
| 2634 | info.v3 = (nfsd->nd_flag & ND_NFSV3); |
| 2635 | |
| 2636 | fhp = &nfh.fh_generic; |
| 2637 | NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, fhp, &error)); |
| 2638 | NEGREPLYOUT(len = nfsm_srvnamesiz(&info, &error)); |
| 2639 | |
| 2640 | error = nfs_namei(&nd, cred, NLC_CREATE, &dvp, &vp, |
| 2641 | fhp, len, slp, nam, &info.md, &info.dpos, &dirp, |
| 2642 | td, (nfsd->nd_flag & ND_KERBAUTH), FALSE); |
| 2643 | if (dirp) { |
| 2644 | if (info.v3) |
| 2645 | dirfor_ret = VOP_GETATTR(dirp, &dirfor); |
| 2646 | } |
| 2647 | if (error) { |
| 2648 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, |
| 2649 | NFSX_WCCDATA(info.v3), &error)); |
| 2650 | nfsm_srvwcc_data(&info, nfsd, dirfor_ret, &dirfor, |
| 2651 | diraft_ret, &diraft); |
| 2652 | error = 0; |
| 2653 | goto nfsmout; |
| 2654 | } |
| 2655 | VATTR_NULL(vap); |
| 2656 | if (info.v3) { |
| 2657 | ERROROUT(nfsm_srvsattr(&info, vap)); |
| 2658 | } else { |
| 2659 | NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED)); |
| 2660 | vap->va_mode = nfstov_mode(*tl++); |
| 2661 | } |
| 2662 | |
| 2663 | /* |
| 2664 | * At this point nd.ni_dvp is referenced and exclusively locked and |
| 2665 | * nd.ni_vp, if it exists, is referenced but not locked. |
| 2666 | */ |
| 2667 | |
| 2668 | vap->va_type = VDIR; |
| 2669 | if (vp != NULL) { |
| 2670 | error = EEXIST; |
| 2671 | goto out; |
| 2672 | } |
| 2673 | |
| 2674 | /* |
| 2675 | * Issue mkdir op. Since SAVESTART is not set, the pathname |
| 2676 | * component is freed by the VOP call. This will fill-in |
| 2677 | * nd.ni_vp, reference, and exclusively lock it. |
| 2678 | */ |
| 2679 | if (vap->va_mode == (mode_t)VNOVAL) |
| 2680 | vap->va_mode = 0; |
| 2681 | vn_unlock(dvp); |
| 2682 | error = VOP_NMKDIR(&nd.nl_nch, dvp, &vp, nd.nl_cred, vap); |
| 2683 | vrele(dvp); |
| 2684 | dvp = NULL; |
| 2685 | |
| 2686 | if (error == 0) { |
| 2687 | bzero(&fhp->fh_fid, sizeof(fhp->fh_fid)); |
| 2688 | error = VFS_VPTOFH(vp, &fhp->fh_fid); |
| 2689 | if (error == 0) |
| 2690 | error = VOP_GETATTR(vp, vap); |
| 2691 | } |
| 2692 | out: |
| 2693 | if (dirp) |
| 2694 | diraft_ret = VOP_GETATTR(dirp, &diraft); |
| 2695 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, |
| 2696 | NFSX_SRVFH(info.v3) + NFSX_POSTOPATTR(info.v3) + |
| 2697 | NFSX_WCCDATA(info.v3), |
| 2698 | &error)); |
| 2699 | if (info.v3) { |
| 2700 | if (!error) { |
| 2701 | nfsm_srvpostop_fh(&info, fhp); |
| 2702 | nfsm_srvpostop_attr(&info, nfsd, 0, vap); |
| 2703 | } |
| 2704 | nfsm_srvwcc_data(&info, nfsd, dirfor_ret, &dirfor, |
| 2705 | diraft_ret, &diraft); |
| 2706 | } else { |
| 2707 | nfsm_srvfhtom(&info, fhp); |
| 2708 | fp = nfsm_build(&info, NFSX_V2FATTR); |
| 2709 | nfsm_srvfattr(nfsd, vap, fp); |
| 2710 | } |
| 2711 | error = 0; |
| 2712 | /* fall through */ |
| 2713 | |
| 2714 | nfsmout: |
| 2715 | *mrq = info.mreq; |
| 2716 | nlookup_done(&nd); |
| 2717 | if (dirp) |
| 2718 | vrele(dirp); |
| 2719 | if (dvp) { |
| 2720 | if (dvp == vp) |
| 2721 | vrele(dvp); |
| 2722 | else |
| 2723 | vput(dvp); |
| 2724 | } |
| 2725 | if (vp) |
| 2726 | vput(vp); |
| 2727 | return (error); |
| 2728 | } |
| 2729 | |
| 2730 | /* |
| 2731 | * nfs rmdir service |
| 2732 | */ |
| 2733 | int |
| 2734 | nfsrv_rmdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, |
| 2735 | struct thread *td, struct mbuf **mrq) |
| 2736 | { |
| 2737 | struct sockaddr *nam = nfsd->nd_nam; |
| 2738 | struct ucred *cred = &nfsd->nd_cr; |
| 2739 | int error = 0, len, dirfor_ret = 1, diraft_ret = 1; |
| 2740 | struct vnode *dirp; |
| 2741 | struct vnode *dvp; |
| 2742 | struct vnode *vp; |
| 2743 | struct vattr dirfor, diraft; |
| 2744 | nfsfh_t nfh; |
| 2745 | fhandle_t *fhp; |
| 2746 | struct nlookupdata nd; |
| 2747 | struct nfsm_info info; |
| 2748 | |
| 2749 | nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); |
| 2750 | nlookup_zero(&nd); |
| 2751 | dirp = NULL; |
| 2752 | dvp = NULL; |
| 2753 | vp = NULL; |
| 2754 | |
| 2755 | info.mrep = nfsd->nd_mrep; |
| 2756 | info.mreq = NULL; |
| 2757 | info.md = nfsd->nd_md; |
| 2758 | info.dpos = nfsd->nd_dpos; |
| 2759 | info.v3 = (nfsd->nd_flag & ND_NFSV3); |
| 2760 | |
| 2761 | fhp = &nfh.fh_generic; |
| 2762 | NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, fhp, &error)); |
| 2763 | NEGREPLYOUT(len = nfsm_srvnamesiz(&info, &error)); |
| 2764 | |
| 2765 | error = nfs_namei(&nd, cred, NLC_DELETE, &dvp, &vp, |
| 2766 | fhp, len, slp, nam, &info.md, &info.dpos, &dirp, |
| 2767 | td, (nfsd->nd_flag & ND_KERBAUTH), FALSE); |
| 2768 | if (dirp) { |
| 2769 | if (info.v3) |
| 2770 | dirfor_ret = VOP_GETATTR(dirp, &dirfor); |
| 2771 | } |
| 2772 | if (error) { |
| 2773 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, |
| 2774 | NFSX_WCCDATA(info.v3), &error)); |
| 2775 | nfsm_srvwcc_data(&info, nfsd, dirfor_ret, &dirfor, |
| 2776 | diraft_ret, &diraft); |
| 2777 | error = 0; |
| 2778 | goto nfsmout; |
| 2779 | } |
| 2780 | if (vp->v_type != VDIR) { |
| 2781 | error = ENOTDIR; |
| 2782 | goto out; |
| 2783 | } |
| 2784 | |
| 2785 | /* |
| 2786 | * The root of a mounted filesystem cannot be deleted. |
| 2787 | */ |
| 2788 | if (vp->v_flag & VROOT) |
| 2789 | error = EBUSY; |
| 2790 | out: |
| 2791 | /* |
| 2792 | * Issue or abort op. Since SAVESTART is not set, path name |
| 2793 | * component is freed by the VOP after either. |
| 2794 | */ |
| 2795 | if (!error) { |
| 2796 | if (dvp != vp) |
| 2797 | vn_unlock(dvp); |
| 2798 | vput(vp); |
| 2799 | vp = NULL; |
| 2800 | error = VOP_NRMDIR(&nd.nl_nch, dvp, nd.nl_cred); |
| 2801 | vrele(dvp); |
| 2802 | dvp = NULL; |
| 2803 | } |
| 2804 | nlookup_done(&nd); |
| 2805 | |
| 2806 | if (dirp) |
| 2807 | diraft_ret = VOP_GETATTR(dirp, &diraft); |
| 2808 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_WCCDATA(info.v3), &error)); |
| 2809 | if (info.v3) { |
| 2810 | nfsm_srvwcc_data(&info, nfsd, dirfor_ret, &dirfor, |
| 2811 | diraft_ret, &diraft); |
| 2812 | error = 0; |
| 2813 | } |
| 2814 | /* fall through */ |
| 2815 | |
| 2816 | nfsmout: |
| 2817 | *mrq = info.mreq; |
| 2818 | if (dvp) { |
| 2819 | if (dvp == vp) |
| 2820 | vrele(dvp); |
| 2821 | else |
| 2822 | vput(dvp); |
| 2823 | } |
| 2824 | nlookup_done(&nd); |
| 2825 | if (dirp) |
| 2826 | vrele(dirp); |
| 2827 | if (vp) |
| 2828 | vput(vp); |
| 2829 | return(error); |
| 2830 | } |
| 2831 | |
| 2832 | /* |
| 2833 | * nfs readdir service |
| 2834 | * - mallocs what it thinks is enough to read |
| 2835 | * count rounded up to a multiple of NFS_DIRBLKSIZ <= NFS_MAXREADDIR |
| 2836 | * - calls VOP_READDIR() |
| 2837 | * - loops around building the reply |
| 2838 | * if the output generated exceeds count break out of loop |
| 2839 | * The nfsm_clget macro is used here so that the reply will be packed |
| 2840 | * tightly in mbuf clusters. |
| 2841 | * - it only knows that it has encountered eof when the VOP_READDIR() |
| 2842 | * reads nothing |
| 2843 | * - as such one readdir rpc will return eof false although you are there |
| 2844 | * and then the next will return eof |
| 2845 | * - it trims out records with d_fileno == 0 |
| 2846 | * this doesn't matter for Unix clients, but they might confuse clients |
| 2847 | * for other os'. |
| 2848 | * NB: It is tempting to set eof to true if the VOP_READDIR() reads less |
| 2849 | * than requested, but this may not apply to all filesystems. For |
| 2850 | * example, client NFS does not { although it is never remote mounted |
| 2851 | * anyhow } |
| 2852 | * The alternate call nfsrv_readdirplus() does lookups as well. |
| 2853 | * PS: The NFS protocol spec. does not clarify what the "count" byte |
| 2854 | * argument is a count of.. just name strings and file id's or the |
| 2855 | * entire reply rpc or ... |
| 2856 | * I tried just file name and id sizes and it confused the Sun client, |
| 2857 | * so I am using the full rpc size now. The "paranoia.." comment refers |
| 2858 | * to including the status longwords that are not a part of the dir. |
| 2859 | * "entry" structures, but are in the rpc. |
| 2860 | */ |
| 2861 | struct flrep { |
| 2862 | nfsuint64 fl_off; |
| 2863 | u_int32_t fl_postopok; |
| 2864 | u_int32_t fl_fattr[NFSX_V3FATTR / sizeof (u_int32_t)]; |
| 2865 | u_int32_t fl_fhok; |
| 2866 | u_int32_t fl_fhsize; |
| 2867 | u_int32_t fl_nfh[NFSX_V3FH / sizeof (u_int32_t)]; |
| 2868 | }; |
| 2869 | |
| 2870 | int |
| 2871 | nfsrv_readdir(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, |
| 2872 | struct thread *td, struct mbuf **mrq) |
| 2873 | { |
| 2874 | struct sockaddr *nam = nfsd->nd_nam; |
| 2875 | struct ucred *cred = &nfsd->nd_cr; |
| 2876 | char *bp, *be; |
| 2877 | struct dirent *dp; |
| 2878 | caddr_t cp; |
| 2879 | u_int32_t *tl; |
| 2880 | struct mbuf *mp1, *mp2; |
| 2881 | char *cpos, *cend, *rbuf; |
| 2882 | struct vnode *vp = NULL; |
| 2883 | struct mount *mp = NULL; |
| 2884 | struct vattr at; |
| 2885 | nfsfh_t nfh; |
| 2886 | fhandle_t *fhp; |
| 2887 | struct uio io; |
| 2888 | struct iovec iv; |
| 2889 | int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; |
| 2890 | int siz, cnt, fullsiz, eofflag, rdonly, ncookies; |
| 2891 | u_quad_t off, toff, verf; |
| 2892 | off_t *cookies = NULL, *cookiep; |
| 2893 | struct nfsm_info info; |
| 2894 | |
| 2895 | info.mrep = nfsd->nd_mrep; |
| 2896 | info.mreq = NULL; |
| 2897 | info.md = nfsd->nd_md; |
| 2898 | info.dpos = nfsd->nd_dpos; |
| 2899 | info.v3 = (nfsd->nd_flag & ND_NFSV3); |
| 2900 | |
| 2901 | nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); |
| 2902 | fhp = &nfh.fh_generic; |
| 2903 | NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, fhp, &error)); |
| 2904 | if (info.v3) { |
| 2905 | NULLOUT(tl = nfsm_dissect(&info, 5 * NFSX_UNSIGNED)); |
| 2906 | toff = fxdr_hyper(tl); |
| 2907 | tl += 2; |
| 2908 | verf = fxdr_hyper(tl); |
| 2909 | tl += 2; |
| 2910 | } else { |
| 2911 | NULLOUT(tl = nfsm_dissect(&info, 2 * NFSX_UNSIGNED)); |
| 2912 | toff = fxdr_unsigned(u_quad_t, *tl++); |
| 2913 | verf = 0; /* shut up gcc */ |
| 2914 | } |
| 2915 | off = toff; |
| 2916 | cnt = fxdr_unsigned(int, *tl); |
| 2917 | siz = ((cnt + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); |
| 2918 | xfer = NFS_SRVMAXDATA(nfsd); |
| 2919 | if ((unsigned)cnt > xfer) |
| 2920 | cnt = xfer; |
| 2921 | if ((unsigned)siz > xfer) |
| 2922 | siz = xfer; |
| 2923 | fullsiz = siz; |
| 2924 | error = nfsrv_fhtovp(fhp, 1, &mp, &vp, cred, slp, nam, |
| 2925 | &rdonly, (nfsd->nd_flag & ND_KERBAUTH), TRUE); |
| 2926 | if (!error && vp->v_type != VDIR) { |
| 2927 | error = ENOTDIR; |
| 2928 | vput(vp); |
| 2929 | vp = NULL; |
| 2930 | } |
| 2931 | if (error) { |
| 2932 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_UNSIGNED, &error)); |
| 2933 | nfsm_srvpostop_attr(&info, nfsd, getret, &at); |
| 2934 | error = 0; |
| 2935 | goto nfsmout; |
| 2936 | } |
| 2937 | |
| 2938 | /* |
| 2939 | * Obtain lock on vnode for this section of the code |
| 2940 | */ |
| 2941 | |
| 2942 | if (info.v3) { |
| 2943 | error = getret = VOP_GETATTR(vp, &at); |
| 2944 | #if 0 |
| 2945 | /* |
| 2946 | * XXX This check may be too strict for Solaris 2.5 clients. |
| 2947 | */ |
| 2948 | if (!error && toff && verf && verf != at.va_filerev) |
| 2949 | error = NFSERR_BAD_COOKIE; |
| 2950 | #endif |
| 2951 | } |
| 2952 | if (!error) |
| 2953 | error = nfsrv_access(mp, vp, VEXEC, cred, rdonly, td, 0); |
| 2954 | if (error) { |
| 2955 | vput(vp); |
| 2956 | vp = NULL; |
| 2957 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, |
| 2958 | NFSX_POSTOPATTR(info.v3), &error)); |
| 2959 | nfsm_srvpostop_attr(&info, nfsd, getret, &at); |
| 2960 | error = 0; |
| 2961 | goto nfsmout; |
| 2962 | } |
| 2963 | vn_unlock(vp); |
| 2964 | |
| 2965 | /* |
| 2966 | * end section. Allocate rbuf and continue |
| 2967 | */ |
| 2968 | MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); |
| 2969 | again: |
| 2970 | iv.iov_base = rbuf; |
| 2971 | iv.iov_len = fullsiz; |
| 2972 | io.uio_iov = &iv; |
| 2973 | io.uio_iovcnt = 1; |
| 2974 | io.uio_offset = (off_t)off; |
| 2975 | io.uio_resid = fullsiz; |
| 2976 | io.uio_segflg = UIO_SYSSPACE; |
| 2977 | io.uio_rw = UIO_READ; |
| 2978 | io.uio_td = NULL; |
| 2979 | eofflag = 0; |
| 2980 | if (cookies) { |
| 2981 | kfree((caddr_t)cookies, M_TEMP); |
| 2982 | cookies = NULL; |
| 2983 | } |
| 2984 | error = VOP_READDIR(vp, &io, cred, &eofflag, &ncookies, &cookies); |
| 2985 | off = (off_t)io.uio_offset; |
| 2986 | if (!cookies && !error) |
| 2987 | error = NFSERR_PERM; |
| 2988 | if (info.v3) { |
| 2989 | getret = VOP_GETATTR(vp, &at); |
| 2990 | if (!error) |
| 2991 | error = getret; |
| 2992 | } |
| 2993 | if (error) { |
| 2994 | vrele(vp); |
| 2995 | vp = NULL; |
| 2996 | kfree((caddr_t)rbuf, M_TEMP); |
| 2997 | if (cookies) |
| 2998 | kfree((caddr_t)cookies, M_TEMP); |
| 2999 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, |
| 3000 | NFSX_POSTOPATTR(info.v3), &error)); |
| 3001 | nfsm_srvpostop_attr(&info, nfsd, getret, &at); |
| 3002 | error = 0; |
| 3003 | goto nfsmout; |
| 3004 | } |
| 3005 | if (io.uio_resid) { |
| 3006 | siz -= io.uio_resid; |
| 3007 | |
| 3008 | /* |
| 3009 | * If nothing read, return eof |
| 3010 | * rpc reply |
| 3011 | */ |
| 3012 | if (siz == 0) { |
| 3013 | vrele(vp); |
| 3014 | vp = NULL; |
| 3015 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, |
| 3016 | NFSX_POSTOPATTR(info.v3) + |
| 3017 | NFSX_COOKIEVERF(info.v3) + |
| 3018 | 2 * NFSX_UNSIGNED, |
| 3019 | &error)); |
| 3020 | if (info.v3) { |
| 3021 | nfsm_srvpostop_attr(&info, nfsd, getret, &at); |
| 3022 | tl = nfsm_build(&info, 4 * NFSX_UNSIGNED); |
| 3023 | txdr_hyper(at.va_filerev, tl); |
| 3024 | tl += 2; |
| 3025 | } else |
| 3026 | tl = nfsm_build(&info, 2 * NFSX_UNSIGNED); |
| 3027 | *tl++ = nfs_false; |
| 3028 | *tl = nfs_true; |
| 3029 | FREE((caddr_t)rbuf, M_TEMP); |
| 3030 | FREE((caddr_t)cookies, M_TEMP); |
| 3031 | error = 0; |
| 3032 | goto nfsmout; |
| 3033 | } |
| 3034 | } |
| 3035 | |
| 3036 | /* |
| 3037 | * Check for degenerate cases of nothing useful read. |
| 3038 | * If so go try again |
| 3039 | */ |
| 3040 | cpos = rbuf; |
| 3041 | cend = rbuf + siz; |
| 3042 | dp = (struct dirent *)cpos; |
| 3043 | cookiep = cookies; |
| 3044 | /* |
| 3045 | * For some reason FreeBSD's ufs_readdir() chooses to back the |
| 3046 | * directory offset up to a block boundary, so it is necessary to |
| 3047 | * skip over the records that preceed the requested offset. This |
| 3048 | * requires the assumption that file offset cookies monotonically |
| 3049 | * increase. |
| 3050 | */ |
| 3051 | while (cpos < cend && ncookies > 0 && |
| 3052 | (dp->d_ino == 0 || dp->d_type == DT_WHT || |
| 3053 | ((u_quad_t)(*cookiep)) <= toff)) { |
| 3054 | dp = _DIRENT_NEXT(dp); |
| 3055 | cpos = (char *)dp; |
| 3056 | cookiep++; |
| 3057 | ncookies--; |
| 3058 | } |
| 3059 | if (cpos >= cend || ncookies == 0) { |
| 3060 | toff = off; |
| 3061 | siz = fullsiz; |
| 3062 | goto again; |
| 3063 | } |
| 3064 | |
| 3065 | len = 3 * NFSX_UNSIGNED; /* paranoia, probably can be 0 */ |
| 3066 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, |
| 3067 | NFSX_POSTOPATTR(info.v3) + |
| 3068 | NFSX_COOKIEVERF(info.v3) + siz, |
| 3069 | &error)); |
| 3070 | if (info.v3) { |
| 3071 | nfsm_srvpostop_attr(&info, nfsd, getret, &at); |
| 3072 | tl = nfsm_build(&info, 2 * NFSX_UNSIGNED); |
| 3073 | txdr_hyper(at.va_filerev, tl); |
| 3074 | } |
| 3075 | mp1 = mp2 = info.mb; |
| 3076 | bp = info.bpos; |
| 3077 | be = bp + M_TRAILINGSPACE(mp1); |
| 3078 | |
| 3079 | /* Loop through the records and build reply */ |
| 3080 | while (cpos < cend && ncookies > 0) { |
| 3081 | if (dp->d_ino != 0 && dp->d_type != DT_WHT) { |
| 3082 | nlen = dp->d_namlen; |
| 3083 | rem = nfsm_rndup(nlen) - nlen; |
| 3084 | len += (4 * NFSX_UNSIGNED + nlen + rem); |
| 3085 | if (info.v3) |
| 3086 | len += 2 * NFSX_UNSIGNED; |
| 3087 | if (len > cnt) { |
| 3088 | eofflag = 0; |
| 3089 | break; |
| 3090 | } |
| 3091 | /* |
| 3092 | * Build the directory record xdr from |
| 3093 | * the dirent entry. |
| 3094 | */ |
| 3095 | tl = nfsm_clget(&info, mp1, mp2, bp, be); |
| 3096 | *tl = nfs_true; |
| 3097 | bp += NFSX_UNSIGNED; |
| 3098 | if (info.v3) { |
| 3099 | tl = nfsm_clget(&info, mp1, mp2, bp, be); |
| 3100 | *tl = txdr_unsigned(dp->d_ino >> 32); |
| 3101 | bp += NFSX_UNSIGNED; |
| 3102 | } |
| 3103 | tl = nfsm_clget(&info, mp1, mp2, bp, be); |
| 3104 | *tl = txdr_unsigned(dp->d_ino); |
| 3105 | bp += NFSX_UNSIGNED; |
| 3106 | tl = nfsm_clget(&info, mp1, mp2, bp, be); |
| 3107 | *tl = txdr_unsigned(nlen); |
| 3108 | bp += NFSX_UNSIGNED; |
| 3109 | |
| 3110 | /* And loop around copying the name */ |
| 3111 | xfer = nlen; |
| 3112 | cp = dp->d_name; |
| 3113 | while (xfer > 0) { |
| 3114 | tl = nfsm_clget(&info, mp1, mp2, bp, be); |
| 3115 | if ((bp+xfer) > be) |
| 3116 | tsiz = be-bp; |
| 3117 | else |
| 3118 | tsiz = xfer; |
| 3119 | bcopy(cp, bp, tsiz); |
| 3120 | bp += tsiz; |
| 3121 | xfer -= tsiz; |
| 3122 | if (xfer > 0) |
| 3123 | cp += tsiz; |
| 3124 | } |
| 3125 | /* And null pad to a int32_t boundary */ |
| 3126 | for (i = 0; i < rem; i++) |
| 3127 | *bp++ = '\0'; |
| 3128 | tl = nfsm_clget(&info, mp1, mp2, bp, be); |
| 3129 | |
| 3130 | /* Finish off the record */ |
| 3131 | if (info.v3) { |
| 3132 | *tl = txdr_unsigned(*cookiep >> 32); |
| 3133 | bp += NFSX_UNSIGNED; |
| 3134 | tl = nfsm_clget(&info, mp1, mp2, bp, be); |
| 3135 | } |
| 3136 | *tl = txdr_unsigned(*cookiep); |
| 3137 | bp += NFSX_UNSIGNED; |
| 3138 | } |
| 3139 | dp = _DIRENT_NEXT(dp); |
| 3140 | cpos = (char *)dp; |
| 3141 | cookiep++; |
| 3142 | ncookies--; |
| 3143 | } |
| 3144 | vrele(vp); |
| 3145 | vp = NULL; |
| 3146 | tl = nfsm_clget(&info, mp1, mp2, bp, be); |
| 3147 | *tl = nfs_false; |
| 3148 | bp += NFSX_UNSIGNED; |
| 3149 | tl = nfsm_clget(&info, mp1, mp2, bp, be); |
| 3150 | if (eofflag) |
| 3151 | *tl = nfs_true; |
| 3152 | else |
| 3153 | *tl = nfs_false; |
| 3154 | bp += NFSX_UNSIGNED; |
| 3155 | if (mp1 != info.mb) { |
| 3156 | if (bp < be) |
| 3157 | mp1->m_len = bp - mtod(mp1, caddr_t); |
| 3158 | } else |
| 3159 | mp1->m_len += bp - info.bpos; |
| 3160 | FREE((caddr_t)rbuf, M_TEMP); |
| 3161 | FREE((caddr_t)cookies, M_TEMP); |
| 3162 | |
| 3163 | nfsmout: |
| 3164 | *mrq = info.mreq; |
| 3165 | if (vp) |
| 3166 | vrele(vp); |
| 3167 | return(error); |
| 3168 | } |
| 3169 | |
| 3170 | int |
| 3171 | nfsrv_readdirplus(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, |
| 3172 | struct thread *td, struct mbuf **mrq) |
| 3173 | { |
| 3174 | struct sockaddr *nam = nfsd->nd_nam; |
| 3175 | struct ucred *cred = &nfsd->nd_cr; |
| 3176 | char *bp, *be; |
| 3177 | struct dirent *dp; |
| 3178 | caddr_t cp; |
| 3179 | u_int32_t *tl; |
| 3180 | struct mbuf *mp1, *mp2; |
| 3181 | char *cpos, *cend, *rbuf; |
| 3182 | struct vnode *vp = NULL, *nvp; |
| 3183 | struct mount *mp = NULL; |
| 3184 | struct flrep fl; |
| 3185 | nfsfh_t nfh; |
| 3186 | fhandle_t *fhp, *nfhp = (fhandle_t *)fl.fl_nfh; |
| 3187 | struct uio io; |
| 3188 | struct iovec iv; |
| 3189 | struct vattr va, at, *vap = &va; |
| 3190 | struct nfs_fattr *fp; |
| 3191 | int len, nlen, rem, xfer, tsiz, i, error = 0, getret = 1; |
| 3192 | int siz, cnt, fullsiz, eofflag, rdonly, dirlen, ncookies; |
| 3193 | u_quad_t off, toff, verf; |
| 3194 | off_t *cookies = NULL, *cookiep; /* needs to be int64_t or off_t */ |
| 3195 | struct nfsm_info info; |
| 3196 | |
| 3197 | info.mrep = nfsd->nd_mrep; |
| 3198 | info.mreq = NULL; |
| 3199 | info.md = nfsd->nd_md; |
| 3200 | info.dpos = nfsd->nd_dpos; |
| 3201 | info.v3 = (nfsd->nd_flag & ND_NFSV3); |
| 3202 | |
| 3203 | nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); |
| 3204 | fhp = &nfh.fh_generic; |
| 3205 | NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, fhp, &error)); |
| 3206 | NULLOUT(tl = nfsm_dissect(&info, 6 * NFSX_UNSIGNED)); |
| 3207 | toff = fxdr_hyper(tl); |
| 3208 | tl += 2; |
| 3209 | verf = fxdr_hyper(tl); |
| 3210 | tl += 2; |
| 3211 | siz = fxdr_unsigned(int, *tl++); |
| 3212 | cnt = fxdr_unsigned(int, *tl); |
| 3213 | off = toff; |
| 3214 | siz = ((siz + DIRBLKSIZ - 1) & ~(DIRBLKSIZ - 1)); |
| 3215 | xfer = NFS_SRVMAXDATA(nfsd); |
| 3216 | if ((unsigned)cnt > xfer) |
| 3217 | cnt = xfer; |
| 3218 | if ((unsigned)siz > xfer) |
| 3219 | siz = xfer; |
| 3220 | fullsiz = siz; |
| 3221 | error = nfsrv_fhtovp(fhp, 1, &mp, &vp, cred, slp, nam, |
| 3222 | &rdonly, (nfsd->nd_flag & ND_KERBAUTH), TRUE); |
| 3223 | if (!error && vp->v_type != VDIR) { |
| 3224 | error = ENOTDIR; |
| 3225 | vput(vp); |
| 3226 | vp = NULL; |
| 3227 | } |
| 3228 | if (error) { |
| 3229 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_UNSIGNED, &error)); |
| 3230 | nfsm_srvpostop_attr(&info, nfsd, getret, &at); |
| 3231 | error = 0; |
| 3232 | goto nfsmout; |
| 3233 | } |
| 3234 | error = getret = VOP_GETATTR(vp, &at); |
| 3235 | #if 0 |
| 3236 | /* |
| 3237 | * XXX This check may be too strict for Solaris 2.5 clients. |
| 3238 | */ |
| 3239 | if (!error && toff && verf && verf != at.va_filerev) |
| 3240 | error = NFSERR_BAD_COOKIE; |
| 3241 | #endif |
| 3242 | if (!error) { |
| 3243 | error = nfsrv_access(mp, vp, VEXEC, cred, rdonly, td, 0); |
| 3244 | } |
| 3245 | if (error) { |
| 3246 | vput(vp); |
| 3247 | vp = NULL; |
| 3248 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, |
| 3249 | NFSX_V3POSTOPATTR, &error)); |
| 3250 | nfsm_srvpostop_attr(&info, nfsd, getret, &at); |
| 3251 | error = 0; |
| 3252 | goto nfsmout; |
| 3253 | } |
| 3254 | vn_unlock(vp); |
| 3255 | MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); |
| 3256 | again: |
| 3257 | iv.iov_base = rbuf; |
| 3258 | iv.iov_len = fullsiz; |
| 3259 | io.uio_iov = &iv; |
| 3260 | io.uio_iovcnt = 1; |
| 3261 | io.uio_offset = (off_t)off; |
| 3262 | io.uio_resid = fullsiz; |
| 3263 | io.uio_segflg = UIO_SYSSPACE; |
| 3264 | io.uio_rw = UIO_READ; |
| 3265 | io.uio_td = NULL; |
| 3266 | eofflag = 0; |
| 3267 | if (cookies) { |
| 3268 | kfree((caddr_t)cookies, M_TEMP); |
| 3269 | cookies = NULL; |
| 3270 | } |
| 3271 | error = VOP_READDIR(vp, &io, cred, &eofflag, &ncookies, &cookies); |
| 3272 | off = (u_quad_t)io.uio_offset; |
| 3273 | getret = VOP_GETATTR(vp, &at); |
| 3274 | if (!cookies && !error) |
| 3275 | error = NFSERR_PERM; |
| 3276 | if (!error) |
| 3277 | error = getret; |
| 3278 | if (error) { |
| 3279 | vrele(vp); |
| 3280 | vp = NULL; |
| 3281 | if (cookies) |
| 3282 | kfree((caddr_t)cookies, M_TEMP); |
| 3283 | kfree((caddr_t)rbuf, M_TEMP); |
| 3284 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, |
| 3285 | NFSX_V3POSTOPATTR, &error)); |
| 3286 | nfsm_srvpostop_attr(&info, nfsd, getret, &at); |
| 3287 | error = 0; |
| 3288 | goto nfsmout; |
| 3289 | } |
| 3290 | if (io.uio_resid) { |
| 3291 | siz -= io.uio_resid; |
| 3292 | |
| 3293 | /* |
| 3294 | * If nothing read, return eof |
| 3295 | * rpc reply |
| 3296 | */ |
| 3297 | if (siz == 0) { |
| 3298 | vrele(vp); |
| 3299 | vp = NULL; |
| 3300 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, |
| 3301 | NFSX_V3POSTOPATTR + |
| 3302 | NFSX_V3COOKIEVERF + |
| 3303 | 2 * NFSX_UNSIGNED, |
| 3304 | &error)); |
| 3305 | nfsm_srvpostop_attr(&info, nfsd, getret, &at); |
| 3306 | tl = nfsm_build(&info, 4 * NFSX_UNSIGNED); |
| 3307 | txdr_hyper(at.va_filerev, tl); |
| 3308 | tl += 2; |
| 3309 | *tl++ = nfs_false; |
| 3310 | *tl = nfs_true; |
| 3311 | FREE((caddr_t)cookies, M_TEMP); |
| 3312 | FREE((caddr_t)rbuf, M_TEMP); |
| 3313 | error = 0; |
| 3314 | goto nfsmout; |
| 3315 | } |
| 3316 | } |
| 3317 | |
| 3318 | /* |
| 3319 | * Check for degenerate cases of nothing useful read. |
| 3320 | * If so go try again |
| 3321 | */ |
| 3322 | cpos = rbuf; |
| 3323 | cend = rbuf + siz; |
| 3324 | dp = (struct dirent *)cpos; |
| 3325 | cookiep = cookies; |
| 3326 | /* |
| 3327 | * For some reason FreeBSD's ufs_readdir() chooses to back the |
| 3328 | * directory offset up to a block boundary, so it is necessary to |
| 3329 | * skip over the records that preceed the requested offset. This |
| 3330 | * requires the assumption that file offset cookies monotonically |
| 3331 | * increase. |
| 3332 | */ |
| 3333 | while (cpos < cend && ncookies > 0 && |
| 3334 | (dp->d_ino == 0 || dp->d_type == DT_WHT || |
| 3335 | ((u_quad_t)(*cookiep)) <= toff)) { |
| 3336 | dp = _DIRENT_NEXT(dp); |
| 3337 | cpos = (char *)dp; |
| 3338 | cookiep++; |
| 3339 | ncookies--; |
| 3340 | } |
| 3341 | if (cpos >= cend || ncookies == 0) { |
| 3342 | toff = off; |
| 3343 | siz = fullsiz; |
| 3344 | goto again; |
| 3345 | } |
| 3346 | |
| 3347 | /* |
| 3348 | * Probe one of the directory entries to see if the filesystem |
| 3349 | * supports VGET. |
| 3350 | */ |
| 3351 | if (VFS_VGET(vp->v_mount, vp, dp->d_ino, &nvp) == EOPNOTSUPP) { |
| 3352 | error = NFSERR_NOTSUPP; |
| 3353 | vrele(vp); |
| 3354 | vp = NULL; |
| 3355 | kfree((caddr_t)cookies, M_TEMP); |
| 3356 | kfree((caddr_t)rbuf, M_TEMP); |
| 3357 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, |
| 3358 | NFSX_V3POSTOPATTR, &error)); |
| 3359 | nfsm_srvpostop_attr(&info, nfsd, getret, &at); |
| 3360 | error = 0; |
| 3361 | goto nfsmout; |
| 3362 | } |
| 3363 | if (nvp) { |
| 3364 | vput(nvp); |
| 3365 | nvp = NULL; |
| 3366 | } |
| 3367 | |
| 3368 | dirlen = len = NFSX_V3POSTOPATTR + NFSX_V3COOKIEVERF + |
| 3369 | 2 * NFSX_UNSIGNED; |
| 3370 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, cnt, &error)); |
| 3371 | nfsm_srvpostop_attr(&info, nfsd, getret, &at); |
| 3372 | tl = nfsm_build(&info, 2 * NFSX_UNSIGNED); |
| 3373 | txdr_hyper(at.va_filerev, tl); |
| 3374 | mp1 = mp2 = info.mb; |
| 3375 | bp = info.bpos; |
| 3376 | be = bp + M_TRAILINGSPACE(mp1); |
| 3377 | |
| 3378 | /* Loop through the records and build reply */ |
| 3379 | while (cpos < cend && ncookies > 0) { |
| 3380 | if (dp->d_ino != 0 && dp->d_type != DT_WHT) { |
| 3381 | nlen = dp->d_namlen; |
| 3382 | rem = nfsm_rndup(nlen) - nlen; |
| 3383 | |
| 3384 | /* |
| 3385 | * For readdir_and_lookup get the vnode using |
| 3386 | * the file number. |
| 3387 | */ |
| 3388 | if (VFS_VGET(vp->v_mount, vp, dp->d_ino, &nvp)) |
| 3389 | goto invalid; |
| 3390 | bzero((caddr_t)nfhp, NFSX_V3FH); |
| 3391 | nfhp->fh_fsid = fhp->fh_fsid; |
| 3392 | if (VFS_VPTOFH(nvp, &nfhp->fh_fid)) { |
| 3393 | vput(nvp); |
| 3394 | nvp = NULL; |
| 3395 | goto invalid; |
| 3396 | } |
| 3397 | if (VOP_GETATTR(nvp, vap)) { |
| 3398 | vput(nvp); |
| 3399 | nvp = NULL; |
| 3400 | goto invalid; |
| 3401 | } |
| 3402 | vput(nvp); |
| 3403 | nvp = NULL; |
| 3404 | |
| 3405 | /* |
| 3406 | * If either the dircount or maxcount will be |
| 3407 | * exceeded, get out now. Both of these lengths |
| 3408 | * are calculated conservatively, including all |
| 3409 | * XDR overheads. |
| 3410 | */ |
| 3411 | len += (8 * NFSX_UNSIGNED + nlen + rem + NFSX_V3FH + |
| 3412 | NFSX_V3POSTOPATTR); |
| 3413 | dirlen += (6 * NFSX_UNSIGNED + nlen + rem); |
| 3414 | if (len > cnt || dirlen > fullsiz) { |
| 3415 | eofflag = 0; |
| 3416 | break; |
| 3417 | } |
| 3418 | |
| 3419 | /* |
| 3420 | * Build the directory record xdr from |
| 3421 | * the dirent entry. |
| 3422 | */ |
| 3423 | fp = (struct nfs_fattr *)&fl.fl_fattr; |
| 3424 | nfsm_srvfattr(nfsd, vap, fp); |
| 3425 | fl.fl_off.nfsuquad[0] = txdr_unsigned(*cookiep >> 32); |
| 3426 | fl.fl_off.nfsuquad[1] = txdr_unsigned(*cookiep); |
| 3427 | fl.fl_postopok = nfs_true; |
| 3428 | fl.fl_fhok = nfs_true; |
| 3429 | fl.fl_fhsize = txdr_unsigned(NFSX_V3FH); |
| 3430 | |
| 3431 | tl = nfsm_clget(&info, mp1, mp2, bp, be); |
| 3432 | *tl = nfs_true; |
| 3433 | bp += NFSX_UNSIGNED; |
| 3434 | tl = nfsm_clget(&info, mp1, mp2, bp, be); |
| 3435 | *tl = txdr_unsigned(dp->d_ino >> 32); |
| 3436 | bp += NFSX_UNSIGNED; |
| 3437 | tl = nfsm_clget(&info, mp1, mp2, bp, be); |
| 3438 | *tl = txdr_unsigned(dp->d_ino); |
| 3439 | bp += NFSX_UNSIGNED; |
| 3440 | tl = nfsm_clget(&info, mp1, mp2, bp, be); |
| 3441 | *tl = txdr_unsigned(nlen); |
| 3442 | bp += NFSX_UNSIGNED; |
| 3443 | |
| 3444 | /* And loop around copying the name */ |
| 3445 | xfer = nlen; |
| 3446 | cp = dp->d_name; |
| 3447 | while (xfer > 0) { |
| 3448 | tl = nfsm_clget(&info, mp1, mp2, bp, be); |
| 3449 | if ((bp + xfer) > be) |
| 3450 | tsiz = be - bp; |
| 3451 | else |
| 3452 | tsiz = xfer; |
| 3453 | bcopy(cp, bp, tsiz); |
| 3454 | bp += tsiz; |
| 3455 | xfer -= tsiz; |
| 3456 | cp += tsiz; |
| 3457 | } |
| 3458 | /* And null pad to a int32_t boundary */ |
| 3459 | for (i = 0; i < rem; i++) |
| 3460 | *bp++ = '\0'; |
| 3461 | |
| 3462 | /* |
| 3463 | * Now copy the flrep structure out. |
| 3464 | */ |
| 3465 | xfer = sizeof (struct flrep); |
| 3466 | cp = (caddr_t)&fl; |
| 3467 | while (xfer > 0) { |
| 3468 | tl = nfsm_clget(&info, mp1, mp2, bp, be); |
| 3469 | if ((bp + xfer) > be) |
| 3470 | tsiz = be - bp; |
| 3471 | else |
| 3472 | tsiz = xfer; |
| 3473 | bcopy(cp, bp, tsiz); |
| 3474 | bp += tsiz; |
| 3475 | xfer -= tsiz; |
| 3476 | cp += tsiz; |
| 3477 | } |
| 3478 | } |
| 3479 | invalid: |
| 3480 | dp = _DIRENT_NEXT(dp); |
| 3481 | cpos = (char *)dp; |
| 3482 | cookiep++; |
| 3483 | ncookies--; |
| 3484 | } |
| 3485 | vrele(vp); |
| 3486 | vp = NULL; |
| 3487 | tl = nfsm_clget(&info, mp1, mp2, bp, be); |
| 3488 | *tl = nfs_false; |
| 3489 | bp += NFSX_UNSIGNED; |
| 3490 | tl = nfsm_clget(&info, mp1, mp2, bp, be); |
| 3491 | if (eofflag) |
| 3492 | *tl = nfs_true; |
| 3493 | else |
| 3494 | *tl = nfs_false; |
| 3495 | bp += NFSX_UNSIGNED; |
| 3496 | if (mp1 != info.mb) { |
| 3497 | if (bp < be) |
| 3498 | mp1->m_len = bp - mtod(mp1, caddr_t); |
| 3499 | } else |
| 3500 | mp1->m_len += bp - info.bpos; |
| 3501 | FREE((caddr_t)cookies, M_TEMP); |
| 3502 | FREE((caddr_t)rbuf, M_TEMP); |
| 3503 | nfsmout: |
| 3504 | *mrq = info.mreq; |
| 3505 | if (vp) |
| 3506 | vrele(vp); |
| 3507 | return(error); |
| 3508 | } |
| 3509 | |
| 3510 | /* |
| 3511 | * nfs commit service |
| 3512 | */ |
| 3513 | int |
| 3514 | nfsrv_commit(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, |
| 3515 | struct thread *td, struct mbuf **mrq) |
| 3516 | { |
| 3517 | struct sockaddr *nam = nfsd->nd_nam; |
| 3518 | struct ucred *cred = &nfsd->nd_cr; |
| 3519 | struct vattr bfor, aft; |
| 3520 | struct vnode *vp = NULL; |
| 3521 | struct mount *mp = NULL; |
| 3522 | nfsfh_t nfh; |
| 3523 | fhandle_t *fhp; |
| 3524 | u_int32_t *tl; |
| 3525 | int error = 0, rdonly, for_ret = 1, aft_ret = 1, cnt; |
| 3526 | u_quad_t off; |
| 3527 | struct nfsm_info info; |
| 3528 | |
| 3529 | info.mrep = nfsd->nd_mrep; |
| 3530 | info.mreq = NULL; |
| 3531 | info.md = nfsd->nd_md; |
| 3532 | info.dpos = nfsd->nd_dpos; |
| 3533 | |
| 3534 | nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); |
| 3535 | fhp = &nfh.fh_generic; |
| 3536 | NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, fhp, &error)); |
| 3537 | NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED)); |
| 3538 | |
| 3539 | /* |
| 3540 | * XXX At this time VOP_FSYNC() does not accept offset and byte |
| 3541 | * count parameters, so these arguments are useless (someday maybe). |
| 3542 | */ |
| 3543 | off = fxdr_hyper(tl); |
| 3544 | tl += 2; |
| 3545 | cnt = fxdr_unsigned(int, *tl); |
| 3546 | error = nfsrv_fhtovp(fhp, 1, &mp, &vp, cred, slp, nam, |
| 3547 | &rdonly, (nfsd->nd_flag & ND_KERBAUTH), TRUE); |
| 3548 | if (error) { |
| 3549 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, |
| 3550 | 2 * NFSX_UNSIGNED, &error)); |
| 3551 | nfsm_srvwcc_data(&info, nfsd, for_ret, &bfor, |
| 3552 | aft_ret, &aft); |
| 3553 | error = 0; |
| 3554 | goto nfsmout; |
| 3555 | } |
| 3556 | for_ret = VOP_GETATTR(vp, &bfor); |
| 3557 | |
| 3558 | if (cnt > MAX_COMMIT_COUNT) { |
| 3559 | /* |
| 3560 | * Give up and do the whole thing |
| 3561 | */ |
| 3562 | if (vp->v_object && |
| 3563 | (vp->v_object->flags & OBJ_MIGHTBEDIRTY)) { |
| 3564 | vm_object_page_clean(vp->v_object, 0, 0, OBJPC_SYNC); |
| 3565 | } |
| 3566 | error = VOP_FSYNC(vp, MNT_WAIT, 0); |
| 3567 | } else { |
| 3568 | /* |
| 3569 | * Locate and synchronously write any buffers that fall |
| 3570 | * into the requested range. Note: we are assuming that |
| 3571 | * f_iosize is a power of 2. |
| 3572 | */ |
| 3573 | int iosize = vp->v_mount->mnt_stat.f_iosize; |
| 3574 | int iomask = iosize - 1; |
| 3575 | off_t loffset; |
| 3576 | |
| 3577 | /* |
| 3578 | * Align to iosize boundry, super-align to page boundry. |
| 3579 | */ |
| 3580 | if (off & iomask) { |
| 3581 | cnt += off & iomask; |
| 3582 | off &= ~(u_quad_t)iomask; |
| 3583 | } |
| 3584 | if (off & PAGE_MASK) { |
| 3585 | cnt += off & PAGE_MASK; |
| 3586 | off &= ~(u_quad_t)PAGE_MASK; |
| 3587 | } |
| 3588 | loffset = off; |
| 3589 | |
| 3590 | if (vp->v_object && |
| 3591 | (vp->v_object->flags & OBJ_MIGHTBEDIRTY)) { |
| 3592 | vm_object_page_clean(vp->v_object, off / PAGE_SIZE, |
| 3593 | (cnt + PAGE_MASK) / PAGE_SIZE, OBJPC_SYNC); |
| 3594 | } |
| 3595 | |
| 3596 | crit_enter(); |
| 3597 | while (cnt > 0) { |
| 3598 | struct buf *bp; |
| 3599 | |
| 3600 | /* |
| 3601 | * If we have a buffer and it is marked B_DELWRI we |
| 3602 | * have to lock and write it. Otherwise the prior |
| 3603 | * write is assumed to have already been committed. |
| 3604 | * |
| 3605 | * WARNING: FINDBLK_TEST buffers represent stable |
| 3606 | * storage but not necessarily stable |
| 3607 | * content. It is ok in this case. |
| 3608 | */ |
| 3609 | if ((bp = findblk(vp, loffset, FINDBLK_TEST)) != NULL) { |
| 3610 | if (bp->b_flags & B_DELWRI) |
| 3611 | bp = findblk(vp, loffset, 0); |
| 3612 | else |
| 3613 | bp = NULL; |
| 3614 | } |
| 3615 | if (bp) { |
| 3616 | if (bp->b_flags & B_DELWRI) { |
| 3617 | bremfree(bp); |
| 3618 | bwrite(bp); |
| 3619 | ++nfs_commit_miss; |
| 3620 | } else { |
| 3621 | BUF_UNLOCK(bp); |
| 3622 | } |
| 3623 | } |
| 3624 | ++nfs_commit_blks; |
| 3625 | if (cnt < iosize) |
| 3626 | break; |
| 3627 | cnt -= iosize; |
| 3628 | loffset += iosize; |
| 3629 | } |
| 3630 | crit_exit(); |
| 3631 | } |
| 3632 | |
| 3633 | aft_ret = VOP_GETATTR(vp, &aft); |
| 3634 | vput(vp); |
| 3635 | vp = NULL; |
| 3636 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, |
| 3637 | NFSX_V3WCCDATA + NFSX_V3WRITEVERF, |
| 3638 | &error)); |
| 3639 | nfsm_srvwcc_data(&info, nfsd, for_ret, &bfor, |
| 3640 | aft_ret, &aft); |
| 3641 | if (!error) { |
| 3642 | tl = nfsm_build(&info, NFSX_V3WRITEVERF); |
| 3643 | if (nfsver.tv_sec == 0) |
| 3644 | nfsver = boottime; |
| 3645 | *tl++ = txdr_unsigned(nfsver.tv_sec); |
| 3646 | *tl = txdr_unsigned(nfsver.tv_nsec / 1000); |
| 3647 | } else { |
| 3648 | error = 0; |
| 3649 | } |
| 3650 | nfsmout: |
| 3651 | *mrq = info.mreq; |
| 3652 | if (vp) |
| 3653 | vput(vp); |
| 3654 | return(error); |
| 3655 | } |
| 3656 | |
| 3657 | /* |
| 3658 | * nfs statfs service |
| 3659 | */ |
| 3660 | int |
| 3661 | nfsrv_statfs(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, |
| 3662 | struct thread *td, struct mbuf **mrq) |
| 3663 | { |
| 3664 | struct sockaddr *nam = nfsd->nd_nam; |
| 3665 | struct ucred *cred = &nfsd->nd_cr; |
| 3666 | struct statfs *sf; |
| 3667 | struct nfs_statfs *sfp; |
| 3668 | int error = 0, rdonly, getret = 1; |
| 3669 | struct vnode *vp = NULL; |
| 3670 | struct mount *mp = NULL; |
| 3671 | struct vattr at; |
| 3672 | nfsfh_t nfh; |
| 3673 | fhandle_t *fhp; |
| 3674 | struct statfs statfs; |
| 3675 | u_quad_t tval; |
| 3676 | struct nfsm_info info; |
| 3677 | |
| 3678 | info.mrep = nfsd->nd_mrep; |
| 3679 | info.mreq = NULL; |
| 3680 | info.md = nfsd->nd_md; |
| 3681 | info.dpos = nfsd->nd_dpos; |
| 3682 | info.v3 = (nfsd->nd_flag & ND_NFSV3); |
| 3683 | |
| 3684 | nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); |
| 3685 | fhp = &nfh.fh_generic; |
| 3686 | NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, fhp, &error)); |
| 3687 | error = nfsrv_fhtovp(fhp, 1, &mp, &vp, cred, slp, nam, |
| 3688 | &rdonly, (nfsd->nd_flag & ND_KERBAUTH), TRUE); |
| 3689 | if (error) { |
| 3690 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_UNSIGNED, &error)); |
| 3691 | nfsm_srvpostop_attr(&info, nfsd, getret, &at); |
| 3692 | error = 0; |
| 3693 | goto nfsmout; |
| 3694 | } |
| 3695 | sf = &statfs; |
| 3696 | error = VFS_STATFS(vp->v_mount, sf, proc0.p_ucred); |
| 3697 | getret = VOP_GETATTR(vp, &at); |
| 3698 | vput(vp); |
| 3699 | vp = NULL; |
| 3700 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, |
| 3701 | NFSX_POSTOPATTR(info.v3) + NFSX_STATFS(info.v3), |
| 3702 | &error)); |
| 3703 | if (info.v3) |
| 3704 | nfsm_srvpostop_attr(&info, nfsd, getret, &at); |
| 3705 | if (error) { |
| 3706 | error = 0; |
| 3707 | goto nfsmout; |
| 3708 | } |
| 3709 | sfp = nfsm_build(&info, NFSX_STATFS(info.v3)); |
| 3710 | if (info.v3) { |
| 3711 | tval = (u_quad_t)sf->f_blocks; |
| 3712 | tval *= (u_quad_t)sf->f_bsize; |
| 3713 | txdr_hyper(tval, &sfp->sf_tbytes); |
| 3714 | tval = (u_quad_t)sf->f_bfree; |
| 3715 | tval *= (u_quad_t)sf->f_bsize; |
| 3716 | txdr_hyper(tval, &sfp->sf_fbytes); |
| 3717 | tval = (u_quad_t)sf->f_bavail; |
| 3718 | tval *= (u_quad_t)sf->f_bsize; |
| 3719 | txdr_hyper(tval, &sfp->sf_abytes); |
| 3720 | sfp->sf_tfiles.nfsuquad[0] = 0; |
| 3721 | sfp->sf_tfiles.nfsuquad[1] = txdr_unsigned(sf->f_files); |
| 3722 | sfp->sf_ffiles.nfsuquad[0] = 0; |
| 3723 | sfp->sf_ffiles.nfsuquad[1] = txdr_unsigned(sf->f_ffree); |
| 3724 | sfp->sf_afiles.nfsuquad[0] = 0; |
| 3725 | sfp->sf_afiles.nfsuquad[1] = txdr_unsigned(sf->f_ffree); |
| 3726 | sfp->sf_invarsec = 0; |
| 3727 | } else { |
| 3728 | sfp->sf_tsize = txdr_unsigned(NFS_MAXDGRAMDATA); |
| 3729 | sfp->sf_bsize = txdr_unsigned(sf->f_bsize); |
| 3730 | sfp->sf_blocks = txdr_unsigned(sf->f_blocks); |
| 3731 | sfp->sf_bfree = txdr_unsigned(sf->f_bfree); |
| 3732 | sfp->sf_bavail = txdr_unsigned(sf->f_bavail); |
| 3733 | } |
| 3734 | nfsmout: |
| 3735 | *mrq = info.mreq; |
| 3736 | if (vp) |
| 3737 | vput(vp); |
| 3738 | return(error); |
| 3739 | } |
| 3740 | |
| 3741 | /* |
| 3742 | * nfs fsinfo service |
| 3743 | */ |
| 3744 | int |
| 3745 | nfsrv_fsinfo(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, |
| 3746 | struct thread *td, struct mbuf **mrq) |
| 3747 | { |
| 3748 | struct sockaddr *nam = nfsd->nd_nam; |
| 3749 | struct ucred *cred = &nfsd->nd_cr; |
| 3750 | struct nfsv3_fsinfo *sip; |
| 3751 | int error = 0, rdonly, getret = 1, pref; |
| 3752 | struct vnode *vp = NULL; |
| 3753 | struct mount *mp = NULL; |
| 3754 | struct vattr at; |
| 3755 | nfsfh_t nfh; |
| 3756 | fhandle_t *fhp; |
| 3757 | u_quad_t maxfsize; |
| 3758 | struct statfs sb; |
| 3759 | struct nfsm_info info; |
| 3760 | |
| 3761 | info.mrep = nfsd->nd_mrep; |
| 3762 | info.mreq = NULL; |
| 3763 | info.md = nfsd->nd_md; |
| 3764 | info.dpos = nfsd->nd_dpos; |
| 3765 | |
| 3766 | nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); |
| 3767 | fhp = &nfh.fh_generic; |
| 3768 | NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, fhp, &error)); |
| 3769 | error = nfsrv_fhtovp(fhp, 1, &mp, &vp, cred, slp, nam, |
| 3770 | &rdonly, (nfsd->nd_flag & ND_KERBAUTH), TRUE); |
| 3771 | if (error) { |
| 3772 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_UNSIGNED, &error)); |
| 3773 | nfsm_srvpostop_attr(&info, nfsd, getret, &at); |
| 3774 | error = 0; |
| 3775 | goto nfsmout; |
| 3776 | } |
| 3777 | |
| 3778 | /* XXX Try to make a guess on the max file size. */ |
| 3779 | VFS_STATFS(vp->v_mount, &sb, proc0.p_ucred); |
| 3780 | maxfsize = (u_quad_t)0x80000000 * sb.f_bsize - 1; |
| 3781 | |
| 3782 | getret = VOP_GETATTR(vp, &at); |
| 3783 | vput(vp); |
| 3784 | vp = NULL; |
| 3785 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, |
| 3786 | NFSX_V3POSTOPATTR + NFSX_V3FSINFO, &error)); |
| 3787 | nfsm_srvpostop_attr(&info, nfsd, getret, &at); |
| 3788 | sip = nfsm_build(&info, NFSX_V3FSINFO); |
| 3789 | |
| 3790 | /* |
| 3791 | * XXX |
| 3792 | * There should be file system VFS OP(s) to get this information. |
| 3793 | * For now, assume ufs. |
| 3794 | */ |
| 3795 | if (slp->ns_so->so_type == SOCK_DGRAM) |
| 3796 | pref = NFS_MAXDGRAMDATA; |
| 3797 | else |
| 3798 | pref = NFS_MAXDATA; |
| 3799 | sip->fs_rtmax = txdr_unsigned(NFS_MAXDATA); |
| 3800 | sip->fs_rtpref = txdr_unsigned(pref); |
| 3801 | sip->fs_rtmult = txdr_unsigned(NFS_FABLKSIZE); |
| 3802 | sip->fs_wtmax = txdr_unsigned(NFS_MAXDATA); |
| 3803 | sip->fs_wtpref = txdr_unsigned(pref); |
| 3804 | sip->fs_wtmult = txdr_unsigned(NFS_FABLKSIZE); |
| 3805 | sip->fs_dtpref = txdr_unsigned(pref); |
| 3806 | txdr_hyper(maxfsize, &sip->fs_maxfilesize); |
| 3807 | sip->fs_timedelta.nfsv3_sec = 0; |
| 3808 | sip->fs_timedelta.nfsv3_nsec = txdr_unsigned(1); |
| 3809 | sip->fs_properties = txdr_unsigned(NFSV3FSINFO_LINK | |
| 3810 | NFSV3FSINFO_SYMLINK | NFSV3FSINFO_HOMOGENEOUS | |
| 3811 | NFSV3FSINFO_CANSETTIME); |
| 3812 | nfsmout: |
| 3813 | *mrq = info.mreq; |
| 3814 | if (vp) |
| 3815 | vput(vp); |
| 3816 | return(error); |
| 3817 | } |
| 3818 | |
| 3819 | /* |
| 3820 | * nfs pathconf service |
| 3821 | */ |
| 3822 | int |
| 3823 | nfsrv_pathconf(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, |
| 3824 | struct thread *td, struct mbuf **mrq) |
| 3825 | { |
| 3826 | struct sockaddr *nam = nfsd->nd_nam; |
| 3827 | struct ucred *cred = &nfsd->nd_cr; |
| 3828 | struct nfsv3_pathconf *pc; |
| 3829 | int error = 0, rdonly, getret = 1; |
| 3830 | register_t linkmax, namemax, chownres, notrunc; |
| 3831 | struct vnode *vp = NULL; |
| 3832 | struct mount *mp = NULL; |
| 3833 | struct vattr at; |
| 3834 | nfsfh_t nfh; |
| 3835 | fhandle_t *fhp; |
| 3836 | struct nfsm_info info; |
| 3837 | |
| 3838 | info.mrep = nfsd->nd_mrep; |
| 3839 | info.mreq = NULL; |
| 3840 | info.md = nfsd->nd_md; |
| 3841 | info.dpos = nfsd->nd_dpos; |
| 3842 | |
| 3843 | nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); |
| 3844 | fhp = &nfh.fh_generic; |
| 3845 | NEGREPLYOUT(nfsm_srvmtofh(&info, nfsd, fhp, &error)); |
| 3846 | error = nfsrv_fhtovp(fhp, 1, &mp, &vp, cred, slp, nam, |
| 3847 | &rdonly, (nfsd->nd_flag & ND_KERBAUTH), TRUE); |
| 3848 | if (error) { |
| 3849 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, NFSX_UNSIGNED, &error)); |
| 3850 | nfsm_srvpostop_attr(&info, nfsd, getret, &at); |
| 3851 | error = 0; |
| 3852 | goto nfsmout; |
| 3853 | } |
| 3854 | error = VOP_PATHCONF(vp, _PC_LINK_MAX, &linkmax); |
| 3855 | if (!error) |
| 3856 | error = VOP_PATHCONF(vp, _PC_NAME_MAX, &namemax); |
| 3857 | if (!error) |
| 3858 | error = VOP_PATHCONF(vp, _PC_CHOWN_RESTRICTED, &chownres); |
| 3859 | if (!error) |
| 3860 | error = VOP_PATHCONF(vp, _PC_NO_TRUNC, ¬runc); |
| 3861 | getret = VOP_GETATTR(vp, &at); |
| 3862 | vput(vp); |
| 3863 | vp = NULL; |
| 3864 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, |
| 3865 | NFSX_V3POSTOPATTR + NFSX_V3PATHCONF, |
| 3866 | &error)); |
| 3867 | nfsm_srvpostop_attr(&info, nfsd, getret, &at); |
| 3868 | if (error) { |
| 3869 | error = 0; |
| 3870 | goto nfsmout; |
| 3871 | } |
| 3872 | pc = nfsm_build(&info, NFSX_V3PATHCONF); |
| 3873 | |
| 3874 | pc->pc_linkmax = txdr_unsigned(linkmax); |
| 3875 | pc->pc_namemax = txdr_unsigned(namemax); |
| 3876 | pc->pc_notrunc = txdr_unsigned(notrunc); |
| 3877 | pc->pc_chownrestricted = txdr_unsigned(chownres); |
| 3878 | |
| 3879 | /* |
| 3880 | * These should probably be supported by VOP_PATHCONF(), but |
| 3881 | * until msdosfs is exportable (why would you want to?), the |
| 3882 | * Unix defaults should be ok. |
| 3883 | */ |
| 3884 | pc->pc_caseinsensitive = nfs_false; |
| 3885 | pc->pc_casepreserving = nfs_true; |
| 3886 | nfsmout: |
| 3887 | *mrq = info.mreq; |
| 3888 | if (vp) |
| 3889 | vput(vp); |
| 3890 | return(error); |
| 3891 | } |
| 3892 | |
| 3893 | /* |
| 3894 | * Null operation, used by clients to ping server |
| 3895 | */ |
| 3896 | /* ARGSUSED */ |
| 3897 | int |
| 3898 | nfsrv_null(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, |
| 3899 | struct thread *td, struct mbuf **mrq) |
| 3900 | { |
| 3901 | struct nfsm_info info; |
| 3902 | int error = NFSERR_RETVOID; |
| 3903 | |
| 3904 | info.mrep = nfsd->nd_mrep; |
| 3905 | info.mreq = NULL; |
| 3906 | |
| 3907 | nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); |
| 3908 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, 0, &error)); |
| 3909 | nfsmout: |
| 3910 | *mrq = info.mreq; |
| 3911 | return (error); |
| 3912 | } |
| 3913 | |
| 3914 | /* |
| 3915 | * No operation, used for obsolete procedures |
| 3916 | */ |
| 3917 | /* ARGSUSED */ |
| 3918 | int |
| 3919 | nfsrv_noop(struct nfsrv_descript *nfsd, struct nfssvc_sock *slp, |
| 3920 | struct thread *td, struct mbuf **mrq) |
| 3921 | { |
| 3922 | struct nfsm_info info; |
| 3923 | int error; |
| 3924 | |
| 3925 | info.mrep = nfsd->nd_mrep; |
| 3926 | info.mreq = NULL; |
| 3927 | |
| 3928 | nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); |
| 3929 | if (nfsd->nd_repstat) |
| 3930 | error = nfsd->nd_repstat; |
| 3931 | else |
| 3932 | error = EPROCUNAVAIL; |
| 3933 | NEGKEEPOUT(nfsm_reply(&info, nfsd, slp, 0, &error)); |
| 3934 | error = 0; |
| 3935 | nfsmout: |
| 3936 | *mrq = info.mreq; |
| 3937 | return (error); |
| 3938 | } |
| 3939 | |
| 3940 | /* |
| 3941 | * Perform access checking for vnodes obtained from file handles that would |
| 3942 | * refer to files already opened by a Unix client. You cannot just use |
| 3943 | * vn_writechk() and VOP_ACCESS() for two reasons. |
| 3944 | * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write case |
| 3945 | * 2 - The owner is to be given access irrespective of mode bits for some |
| 3946 | * operations, so that processes that chmod after opening a file don't |
| 3947 | * break. I don't like this because it opens a security hole, but since |
| 3948 | * the nfs server opens a security hole the size of a barn door anyhow, |
| 3949 | * what the heck. |
| 3950 | * |
| 3951 | * The exception to rule 2 is EPERM. If a file is IMMUTABLE, VOP_ACCESS() |
| 3952 | * will return EPERM instead of EACCESS. EPERM is always an error. |
| 3953 | */ |
| 3954 | static int |
| 3955 | nfsrv_access(struct mount *mp, struct vnode *vp, int flags, struct ucred *cred, |
| 3956 | int rdonly, struct thread *td, int override) |
| 3957 | { |
| 3958 | struct vattr vattr; |
| 3959 | int error; |
| 3960 | |
| 3961 | nfsdbprintf(("%s %d\n", __FILE__, __LINE__)); |
| 3962 | if (flags & VWRITE) { |
| 3963 | /* Just vn_writechk() changed to check rdonly */ |
| 3964 | /* |
| 3965 | * Disallow write attempts on read-only file systems; |
| 3966 | * unless the file is a socket or a block or character |
| 3967 | * device resident on the file system. |
| 3968 | */ |
| 3969 | if (rdonly || |
| 3970 | ((mp->mnt_flag | vp->v_mount->mnt_flag) & MNT_RDONLY)) { |
| 3971 | switch (vp->v_type) { |
| 3972 | case VREG: |
| 3973 | case VDIR: |
| 3974 | case VLNK: |
| 3975 | return (EROFS); |
| 3976 | default: |
| 3977 | break; |
| 3978 | } |
| 3979 | } |
| 3980 | /* |
| 3981 | * If there's shared text associated with |
| 3982 | * the inode, we can't allow writing. |
| 3983 | */ |
| 3984 | if (vp->v_flag & VTEXT) |
| 3985 | return (ETXTBSY); |
| 3986 | } |
| 3987 | error = VOP_GETATTR(vp, &vattr); |
| 3988 | if (error) |
| 3989 | return (error); |
| 3990 | error = VOP_ACCESS(vp, flags, cred); /* XXX ruid/rgid vs uid/gid */ |
| 3991 | /* |
| 3992 | * Allow certain operations for the owner (reads and writes |
| 3993 | * on files that are already open). |
| 3994 | */ |
| 3995 | if (override && error == EACCES && cred->cr_uid == vattr.va_uid) |
| 3996 | error = 0; |
| 3997 | return error; |
| 3998 | } |
| 3999 | #endif /* NFS_NOSERVER */ |
| 4000 | |