| 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 | * %sccs.include.redist.c% |
| 9 | * |
| 10 | * @(#)nfs_serv.c 8.4 (Berkeley) %G% |
| 11 | */ |
| 12 | |
| 13 | /* |
| 14 | * nfs version 2 server calls to vnode ops |
| 15 | * - these routines generally have 3 phases |
| 16 | * 1 - break down and validate rpc request in mbuf list |
| 17 | * 2 - do the vnode ops for the request |
| 18 | * (surprisingly ?? many are very similar to syscalls in vfs_syscalls.c) |
| 19 | * 3 - build the rpc reply in an mbuf list |
| 20 | * nb: |
| 21 | * - do not mix the phases, since the nfsm_?? macros can return failures |
| 22 | * on a bad rpc or similar and do not do any vrele() or vput()'s |
| 23 | * |
| 24 | * - the nfsm_reply() macro generates an nfs rpc reply with the nfs |
| 25 | * error number iff error != 0 whereas |
| 26 | * returning an error from the server function implies a fatal error |
| 27 | * such as a badly constructed rpc request that should be dropped without |
| 28 | * a reply. |
| 29 | */ |
| 30 | |
| 31 | #include <sys/param.h> |
| 32 | #include <sys/systm.h> |
| 33 | #include <sys/proc.h> |
| 34 | #include <sys/file.h> |
| 35 | #include <sys/namei.h> |
| 36 | #include <sys/vnode.h> |
| 37 | #include <sys/mount.h> |
| 38 | #include <sys/mbuf.h> |
| 39 | #include <sys/dirent.h> |
| 40 | #include <sys/stat.h> |
| 41 | |
| 42 | #include <vm/vm.h> |
| 43 | |
| 44 | #include <nfs/nfsv2.h> |
| 45 | #include <nfs/rpcv2.h> |
| 46 | #include <nfs/nfs.h> |
| 47 | #include <nfs/xdr_subs.h> |
| 48 | #include <nfs/nfsm_subs.h> |
| 49 | #include <nfs/nqnfs.h> |
| 50 | |
| 51 | /* Defs */ |
| 52 | #define TRUE 1 |
| 53 | #define FALSE 0 |
| 54 | |
| 55 | /* Global vars */ |
| 56 | extern u_long nfs_procids[NFS_NPROCS]; |
| 57 | extern u_long nfs_xdrneg1; |
| 58 | extern u_long nfs_false, nfs_true; |
| 59 | nfstype nfs_type[9] = { NFNON, NFREG, NFDIR, NFBLK, NFCHR, NFLNK, NFNON, |
| 60 | NFCHR, NFNON }; |
| 61 | |
| 62 | /* |
| 63 | * nqnfs access service |
| 64 | */ |
| 65 | nqnfsrv_access(nfsd, mrep, md, dpos, cred, nam, mrq) |
| 66 | struct nfsd *nfsd; |
| 67 | struct mbuf *mrep, *md; |
| 68 | caddr_t dpos; |
| 69 | struct ucred *cred; |
| 70 | struct mbuf *nam, **mrq; |
| 71 | { |
| 72 | struct vnode *vp; |
| 73 | nfsv2fh_t nfh; |
| 74 | fhandle_t *fhp; |
| 75 | register u_long *tl; |
| 76 | register long t1; |
| 77 | caddr_t bpos; |
| 78 | int error = 0, rdonly, cache, mode = 0; |
| 79 | char *cp2; |
| 80 | struct mbuf *mb, *mreq; |
| 81 | u_quad_t frev; |
| 82 | |
| 83 | fhp = &nfh.fh_generic; |
| 84 | nfsm_srvmtofh(fhp); |
| 85 | nfsm_dissect(tl, u_long *, 3 * NFSX_UNSIGNED); |
| 86 | if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred, nfsd->nd_slp, nam, &rdonly)) |
| 87 | nfsm_reply(0); |
| 88 | if (*tl++ == nfs_true) |
| 89 | mode |= VREAD; |
| 90 | if (*tl++ == nfs_true) |
| 91 | mode |= VWRITE; |
| 92 | if (*tl == nfs_true) |
| 93 | mode |= VEXEC; |
| 94 | error = nfsrv_access(vp, mode, cred, rdonly, nfsd->nd_procp); |
| 95 | vput(vp); |
| 96 | nfsm_reply(0); |
| 97 | nfsm_srvdone; |
| 98 | } |
| 99 | |
| 100 | /* |
| 101 | * nfs getattr service |
| 102 | */ |
| 103 | nfsrv_getattr(nfsd, mrep, md, dpos, cred, nam, mrq) |
| 104 | struct nfsd *nfsd; |
| 105 | struct mbuf *mrep, *md; |
| 106 | caddr_t dpos; |
| 107 | struct ucred *cred; |
| 108 | struct mbuf *nam, **mrq; |
| 109 | { |
| 110 | register struct nfsv2_fattr *fp; |
| 111 | struct vattr va; |
| 112 | register struct vattr *vap = &va; |
| 113 | struct vnode *vp; |
| 114 | nfsv2fh_t nfh; |
| 115 | fhandle_t *fhp; |
| 116 | register u_long *tl; |
| 117 | register long t1; |
| 118 | caddr_t bpos; |
| 119 | int error = 0, rdonly, cache; |
| 120 | char *cp2; |
| 121 | struct mbuf *mb, *mb2, *mreq; |
| 122 | u_quad_t frev; |
| 123 | |
| 124 | fhp = &nfh.fh_generic; |
| 125 | nfsm_srvmtofh(fhp); |
| 126 | if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred, nfsd->nd_slp, nam, &rdonly)) |
| 127 | nfsm_reply(0); |
| 128 | nqsrv_getl(vp, NQL_READ); |
| 129 | error = VOP_GETATTR(vp, vap, cred, nfsd->nd_procp); |
| 130 | vput(vp); |
| 131 | nfsm_reply(NFSX_FATTR(nfsd->nd_nqlflag != NQL_NOVAL)); |
| 132 | nfsm_build(fp, struct nfsv2_fattr *, NFSX_FATTR(nfsd->nd_nqlflag != NQL_NOVAL)); |
| 133 | nfsm_srvfillattr; |
| 134 | nfsm_srvdone; |
| 135 | } |
| 136 | |
| 137 | /* |
| 138 | * nfs setattr service |
| 139 | */ |
| 140 | nfsrv_setattr(nfsd, mrep, md, dpos, cred, nam, mrq) |
| 141 | struct nfsd *nfsd; |
| 142 | struct mbuf *mrep, *md; |
| 143 | caddr_t dpos; |
| 144 | struct ucred *cred; |
| 145 | struct mbuf *nam, **mrq; |
| 146 | { |
| 147 | struct vattr va; |
| 148 | register struct vattr *vap = &va; |
| 149 | register struct nfsv2_sattr *sp; |
| 150 | register struct nfsv2_fattr *fp; |
| 151 | struct vnode *vp; |
| 152 | nfsv2fh_t nfh; |
| 153 | fhandle_t *fhp; |
| 154 | register u_long *tl; |
| 155 | register long t1; |
| 156 | caddr_t bpos; |
| 157 | int error = 0, rdonly, cache; |
| 158 | char *cp2; |
| 159 | struct mbuf *mb, *mb2, *mreq; |
| 160 | u_quad_t frev, frev2; |
| 161 | |
| 162 | fhp = &nfh.fh_generic; |
| 163 | nfsm_srvmtofh(fhp); |
| 164 | nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_SATTR(nfsd->nd_nqlflag != NQL_NOVAL)); |
| 165 | if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred, nfsd->nd_slp, nam, &rdonly)) |
| 166 | nfsm_reply(0); |
| 167 | nqsrv_getl(vp, NQL_WRITE); |
| 168 | VATTR_NULL(vap); |
| 169 | /* |
| 170 | * Nah nah nah nah na nah |
| 171 | * There is a bug in the Sun client that puts 0xffff in the mode |
| 172 | * field of sattr when it should put in 0xffffffff. The u_short |
| 173 | * doesn't sign extend. |
| 174 | * --> check the low order 2 bytes for 0xffff |
| 175 | */ |
| 176 | if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) |
| 177 | vap->va_mode = nfstov_mode(sp->sa_mode); |
| 178 | if (sp->sa_uid != nfs_xdrneg1) |
| 179 | vap->va_uid = fxdr_unsigned(uid_t, sp->sa_uid); |
| 180 | if (sp->sa_gid != nfs_xdrneg1) |
| 181 | vap->va_gid = fxdr_unsigned(gid_t, sp->sa_gid); |
| 182 | if (nfsd->nd_nqlflag == NQL_NOVAL) { |
| 183 | if (sp->sa_nfssize != nfs_xdrneg1) |
| 184 | vap->va_size = fxdr_unsigned(u_quad_t, sp->sa_nfssize); |
| 185 | if (sp->sa_nfsatime.nfs_sec != nfs_xdrneg1) { |
| 186 | #ifdef notyet |
| 187 | fxdr_nfstime(&sp->sa_nfsatime, &vap->va_atime); |
| 188 | #else |
| 189 | vap->va_atime.ts_sec = |
| 190 | fxdr_unsigned(long, sp->sa_nfsatime.nfs_sec); |
| 191 | vap->va_atime.ts_nsec = 0; |
| 192 | #endif |
| 193 | } |
| 194 | if (sp->sa_nfsmtime.nfs_sec != nfs_xdrneg1) |
| 195 | fxdr_nfstime(&sp->sa_nfsmtime, &vap->va_mtime); |
| 196 | } else { |
| 197 | fxdr_hyper(&sp->sa_nqsize, &vap->va_size); |
| 198 | fxdr_nqtime(&sp->sa_nqatime, &vap->va_atime); |
| 199 | fxdr_nqtime(&sp->sa_nqmtime, &vap->va_mtime); |
| 200 | vap->va_flags = fxdr_unsigned(u_long, sp->sa_nqflags); |
| 201 | } |
| 202 | |
| 203 | /* |
| 204 | * If the size is being changed write acces is required, otherwise |
| 205 | * just check for a read only file system. |
| 206 | */ |
| 207 | if (vap->va_size == ((u_quad_t)((quad_t) -1))) { |
| 208 | if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { |
| 209 | error = EROFS; |
| 210 | goto out; |
| 211 | } |
| 212 | } else { |
| 213 | if (vp->v_type == VDIR) { |
| 214 | error = EISDIR; |
| 215 | goto out; |
| 216 | } else if (error = nfsrv_access(vp, VWRITE, cred, rdonly, |
| 217 | nfsd->nd_procp)) |
| 218 | goto out; |
| 219 | } |
| 220 | if (error = VOP_SETATTR(vp, vap, cred, nfsd->nd_procp)) { |
| 221 | vput(vp); |
| 222 | nfsm_reply(0); |
| 223 | } |
| 224 | error = VOP_GETATTR(vp, vap, cred, nfsd->nd_procp); |
| 225 | out: |
| 226 | vput(vp); |
| 227 | nfsm_reply(NFSX_FATTR(nfsd->nd_nqlflag != NQL_NOVAL) + 2*NFSX_UNSIGNED); |
| 228 | nfsm_build(fp, struct nfsv2_fattr *, NFSX_FATTR(nfsd->nd_nqlflag != NQL_NOVAL)); |
| 229 | nfsm_srvfillattr; |
| 230 | if (nfsd->nd_nqlflag != NQL_NOVAL) { |
| 231 | nfsm_build(tl, u_long *, 2*NFSX_UNSIGNED); |
| 232 | txdr_hyper(&frev2, tl); |
| 233 | } |
| 234 | nfsm_srvdone; |
| 235 | } |
| 236 | |
| 237 | /* |
| 238 | * nfs lookup rpc |
| 239 | */ |
| 240 | nfsrv_lookup(nfsd, mrep, md, dpos, cred, nam, mrq) |
| 241 | struct nfsd *nfsd; |
| 242 | struct mbuf *mrep, *md; |
| 243 | caddr_t dpos; |
| 244 | struct ucred *cred; |
| 245 | struct mbuf *nam, **mrq; |
| 246 | { |
| 247 | register struct nfsv2_fattr *fp; |
| 248 | struct nameidata nd; |
| 249 | struct vnode *vp; |
| 250 | nfsv2fh_t nfh; |
| 251 | fhandle_t *fhp; |
| 252 | register caddr_t cp; |
| 253 | register u_long *tl; |
| 254 | register long t1; |
| 255 | caddr_t bpos; |
| 256 | int error = 0, cache, duration2, cache2, len; |
| 257 | char *cp2; |
| 258 | struct mbuf *mb, *mb2, *mreq; |
| 259 | struct vattr va, *vap = &va; |
| 260 | u_quad_t frev, frev2; |
| 261 | |
| 262 | fhp = &nfh.fh_generic; |
| 263 | duration2 = 0; |
| 264 | if (nfsd->nd_nqlflag != NQL_NOVAL) { |
| 265 | nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); |
| 266 | duration2 = fxdr_unsigned(int, *tl); |
| 267 | } |
| 268 | nfsm_srvmtofh(fhp); |
| 269 | nfsm_srvstrsiz(len, NFS_MAXNAMLEN); |
| 270 | nd.ni_cnd.cn_cred = cred; |
| 271 | nd.ni_cnd.cn_nameiop = LOOKUP; |
| 272 | nd.ni_cnd.cn_flags = LOCKLEAF | SAVESTART; |
| 273 | if (error = nfs_namei(&nd, fhp, len, nfsd->nd_slp, nam, &md, &dpos, |
| 274 | nfsd->nd_procp)) |
| 275 | nfsm_reply(0); |
| 276 | nqsrv_getl(nd.ni_startdir, NQL_READ); |
| 277 | vrele(nd.ni_startdir); |
| 278 | FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI); |
| 279 | vp = nd.ni_vp; |
| 280 | bzero((caddr_t)fhp, sizeof(nfh)); |
| 281 | fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; |
| 282 | if (error = VFS_VPTOFH(vp, &fhp->fh_fid)) { |
| 283 | vput(vp); |
| 284 | nfsm_reply(0); |
| 285 | } |
| 286 | if (duration2) |
| 287 | (void) nqsrv_getlease(vp, &duration2, NQL_READ, nfsd, |
| 288 | nam, &cache2, &frev2, cred); |
| 289 | error = VOP_GETATTR(vp, vap, cred, nfsd->nd_procp); |
| 290 | vput(vp); |
| 291 | nfsm_reply(NFSX_FH + NFSX_FATTR(nfsd->nd_nqlflag != NQL_NOVAL) + 5*NFSX_UNSIGNED); |
| 292 | if (nfsd->nd_nqlflag != NQL_NOVAL) { |
| 293 | if (duration2) { |
| 294 | nfsm_build(tl, u_long *, 5*NFSX_UNSIGNED); |
| 295 | *tl++ = txdr_unsigned(NQL_READ); |
| 296 | *tl++ = txdr_unsigned(cache2); |
| 297 | *tl++ = txdr_unsigned(duration2); |
| 298 | txdr_hyper(&frev2, tl); |
| 299 | } else { |
| 300 | nfsm_build(tl, u_long *, NFSX_UNSIGNED); |
| 301 | *tl = 0; |
| 302 | } |
| 303 | } |
| 304 | nfsm_srvfhtom(fhp); |
| 305 | nfsm_build(fp, struct nfsv2_fattr *, NFSX_FATTR(nfsd->nd_nqlflag != NQL_NOVAL)); |
| 306 | nfsm_srvfillattr; |
| 307 | nfsm_srvdone; |
| 308 | } |
| 309 | |
| 310 | /* |
| 311 | * nfs readlink service |
| 312 | */ |
| 313 | nfsrv_readlink(nfsd, mrep, md, dpos, cred, nam, mrq) |
| 314 | struct nfsd *nfsd; |
| 315 | struct mbuf *mrep, *md; |
| 316 | caddr_t dpos; |
| 317 | struct ucred *cred; |
| 318 | struct mbuf *nam, **mrq; |
| 319 | { |
| 320 | struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; |
| 321 | register struct iovec *ivp = iv; |
| 322 | register struct mbuf *mp; |
| 323 | register u_long *tl; |
| 324 | register long t1; |
| 325 | caddr_t bpos; |
| 326 | int error = 0, rdonly, cache, i, tlen, len; |
| 327 | char *cp2; |
| 328 | struct mbuf *mb, *mb2, *mp2, *mp3, *mreq; |
| 329 | struct vnode *vp; |
| 330 | nfsv2fh_t nfh; |
| 331 | fhandle_t *fhp; |
| 332 | struct uio io, *uiop = &io; |
| 333 | u_quad_t frev; |
| 334 | |
| 335 | fhp = &nfh.fh_generic; |
| 336 | nfsm_srvmtofh(fhp); |
| 337 | len = 0; |
| 338 | i = 0; |
| 339 | while (len < NFS_MAXPATHLEN) { |
| 340 | MGET(mp, M_WAIT, MT_DATA); |
| 341 | MCLGET(mp, M_WAIT); |
| 342 | mp->m_len = NFSMSIZ(mp); |
| 343 | if (len == 0) |
| 344 | mp3 = mp2 = mp; |
| 345 | else { |
| 346 | mp2->m_next = mp; |
| 347 | mp2 = mp; |
| 348 | } |
| 349 | if ((len+mp->m_len) > NFS_MAXPATHLEN) { |
| 350 | mp->m_len = NFS_MAXPATHLEN-len; |
| 351 | len = NFS_MAXPATHLEN; |
| 352 | } else |
| 353 | len += mp->m_len; |
| 354 | ivp->iov_base = mtod(mp, caddr_t); |
| 355 | ivp->iov_len = mp->m_len; |
| 356 | i++; |
| 357 | ivp++; |
| 358 | } |
| 359 | uiop->uio_iov = iv; |
| 360 | uiop->uio_iovcnt = i; |
| 361 | uiop->uio_offset = 0; |
| 362 | uiop->uio_resid = len; |
| 363 | uiop->uio_rw = UIO_READ; |
| 364 | uiop->uio_segflg = UIO_SYSSPACE; |
| 365 | uiop->uio_procp = (struct proc *)0; |
| 366 | if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred, nfsd->nd_slp, nam, &rdonly)) { |
| 367 | m_freem(mp3); |
| 368 | nfsm_reply(0); |
| 369 | } |
| 370 | if (vp->v_type != VLNK) { |
| 371 | error = EINVAL; |
| 372 | goto out; |
| 373 | } |
| 374 | nqsrv_getl(vp, NQL_READ); |
| 375 | error = VOP_READLINK(vp, uiop, cred); |
| 376 | out: |
| 377 | vput(vp); |
| 378 | if (error) |
| 379 | m_freem(mp3); |
| 380 | nfsm_reply(NFSX_UNSIGNED); |
| 381 | if (uiop->uio_resid > 0) { |
| 382 | len -= uiop->uio_resid; |
| 383 | tlen = nfsm_rndup(len); |
| 384 | nfsm_adj(mp3, NFS_MAXPATHLEN-tlen, tlen-len); |
| 385 | } |
| 386 | nfsm_build(tl, u_long *, NFSX_UNSIGNED); |
| 387 | *tl = txdr_unsigned(len); |
| 388 | mb->m_next = mp3; |
| 389 | nfsm_srvdone; |
| 390 | } |
| 391 | |
| 392 | /* |
| 393 | * nfs read service |
| 394 | */ |
| 395 | nfsrv_read(nfsd, mrep, md, dpos, cred, nam, mrq) |
| 396 | struct nfsd *nfsd; |
| 397 | struct mbuf *mrep, *md; |
| 398 | caddr_t dpos; |
| 399 | struct ucred *cred; |
| 400 | struct mbuf *nam, **mrq; |
| 401 | { |
| 402 | register struct iovec *iv; |
| 403 | struct iovec *iv2; |
| 404 | register struct mbuf *m; |
| 405 | register struct nfsv2_fattr *fp; |
| 406 | register u_long *tl; |
| 407 | register long t1; |
| 408 | caddr_t bpos; |
| 409 | int error = 0, rdonly, cache, i, cnt, len, left, siz, tlen; |
| 410 | char *cp2; |
| 411 | struct mbuf *mb, *mb2, *mreq; |
| 412 | struct mbuf *m2; |
| 413 | struct vnode *vp; |
| 414 | nfsv2fh_t nfh; |
| 415 | fhandle_t *fhp; |
| 416 | struct uio io, *uiop = &io; |
| 417 | struct vattr va, *vap = &va; |
| 418 | off_t off; |
| 419 | u_quad_t frev; |
| 420 | |
| 421 | fhp = &nfh.fh_generic; |
| 422 | nfsm_srvmtofh(fhp); |
| 423 | if (nfsd->nd_nqlflag == NQL_NOVAL) { |
| 424 | nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); |
| 425 | off = (off_t)fxdr_unsigned(u_long, *tl); |
| 426 | } else { |
| 427 | nfsm_dissect(tl, u_long *, 2 * NFSX_UNSIGNED); |
| 428 | fxdr_hyper(tl, &off); |
| 429 | } |
| 430 | nfsm_srvstrsiz(cnt, NFS_MAXDATA); |
| 431 | if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred, nfsd->nd_slp, nam, &rdonly)) |
| 432 | nfsm_reply(0); |
| 433 | if (vp->v_type != VREG) { |
| 434 | error = (vp->v_type == VDIR) ? EISDIR : EACCES; |
| 435 | vput(vp); |
| 436 | nfsm_reply(0); |
| 437 | } |
| 438 | nqsrv_getl(vp, NQL_READ); |
| 439 | if ((error = nfsrv_access(vp, VREAD, cred, rdonly, nfsd->nd_procp)) && |
| 440 | (error = nfsrv_access(vp, VEXEC, cred, rdonly, nfsd->nd_procp))) { |
| 441 | vput(vp); |
| 442 | nfsm_reply(0); |
| 443 | } |
| 444 | if (error = VOP_GETATTR(vp, vap, cred, nfsd->nd_procp)) { |
| 445 | vput(vp); |
| 446 | nfsm_reply(0); |
| 447 | } |
| 448 | if (off >= vap->va_size) |
| 449 | cnt = 0; |
| 450 | else if ((off + cnt) > vap->va_size) |
| 451 | cnt = nfsm_rndup(vap->va_size - off); |
| 452 | nfsm_reply(NFSX_FATTR(nfsd->nd_nqlflag != NQL_NOVAL)+NFSX_UNSIGNED+nfsm_rndup(cnt)); |
| 453 | nfsm_build(fp, struct nfsv2_fattr *, NFSX_FATTR(nfsd->nd_nqlflag != NQL_NOVAL)); |
| 454 | nfsm_build(tl, u_long *, NFSX_UNSIGNED); |
| 455 | len = left = cnt; |
| 456 | if (cnt > 0) { |
| 457 | /* |
| 458 | * Generate the mbuf list with the uio_iov ref. to it. |
| 459 | */ |
| 460 | i = 0; |
| 461 | m = m2 = mb; |
| 462 | MALLOC(iv, struct iovec *, |
| 463 | ((NFS_MAXDATA+MLEN-1)/MLEN) * sizeof (struct iovec), |
| 464 | M_TEMP, M_WAITOK); |
| 465 | iv2 = iv; |
| 466 | while (left > 0) { |
| 467 | siz = min(M_TRAILINGSPACE(m), left); |
| 468 | if (siz > 0) { |
| 469 | m->m_len += siz; |
| 470 | iv->iov_base = bpos; |
| 471 | iv->iov_len = siz; |
| 472 | iv++; |
| 473 | i++; |
| 474 | left -= siz; |
| 475 | } |
| 476 | if (left > 0) { |
| 477 | MGET(m, M_WAIT, MT_DATA); |
| 478 | MCLGET(m, M_WAIT); |
| 479 | m->m_len = 0; |
| 480 | m2->m_next = m; |
| 481 | m2 = m; |
| 482 | bpos = mtod(m, caddr_t); |
| 483 | } |
| 484 | } |
| 485 | uiop->uio_iov = iv2; |
| 486 | uiop->uio_iovcnt = i; |
| 487 | uiop->uio_offset = off; |
| 488 | uiop->uio_resid = cnt; |
| 489 | uiop->uio_rw = UIO_READ; |
| 490 | uiop->uio_segflg = UIO_SYSSPACE; |
| 491 | error = VOP_READ(vp, uiop, IO_NODELOCKED, cred); |
| 492 | off = uiop->uio_offset; |
| 493 | FREE((caddr_t)iv2, M_TEMP); |
| 494 | if (error || (error = VOP_GETATTR(vp, vap, cred, nfsd->nd_procp))) { |
| 495 | m_freem(mreq); |
| 496 | vput(vp); |
| 497 | nfsm_reply(0); |
| 498 | } |
| 499 | } else |
| 500 | uiop->uio_resid = 0; |
| 501 | vput(vp); |
| 502 | nfsm_srvfillattr; |
| 503 | len -= uiop->uio_resid; |
| 504 | tlen = nfsm_rndup(len); |
| 505 | if (cnt != tlen || tlen != len) |
| 506 | nfsm_adj(mb, cnt-tlen, tlen-len); |
| 507 | *tl = txdr_unsigned(len); |
| 508 | nfsm_srvdone; |
| 509 | } |
| 510 | |
| 511 | /* |
| 512 | * nfs write service |
| 513 | */ |
| 514 | nfsrv_write(nfsd, mrep, md, dpos, cred, nam, mrq) |
| 515 | struct nfsd *nfsd; |
| 516 | struct mbuf *mrep, *md; |
| 517 | caddr_t dpos; |
| 518 | struct ucred *cred; |
| 519 | struct mbuf *nam, **mrq; |
| 520 | { |
| 521 | register struct iovec *ivp; |
| 522 | register struct mbuf *mp; |
| 523 | register struct nfsv2_fattr *fp; |
| 524 | struct iovec iv[NFS_MAXIOVEC]; |
| 525 | struct vattr va; |
| 526 | register struct vattr *vap = &va; |
| 527 | register u_long *tl; |
| 528 | register long t1; |
| 529 | caddr_t bpos; |
| 530 | int error = 0, rdonly, cache, siz, len, xfer; |
| 531 | int ioflags = IO_SYNC | IO_NODELOCKED; |
| 532 | char *cp2; |
| 533 | struct mbuf *mb, *mb2, *mreq; |
| 534 | struct vnode *vp; |
| 535 | nfsv2fh_t nfh; |
| 536 | fhandle_t *fhp; |
| 537 | struct uio io, *uiop = &io; |
| 538 | off_t off; |
| 539 | u_quad_t frev; |
| 540 | |
| 541 | fhp = &nfh.fh_generic; |
| 542 | nfsm_srvmtofh(fhp); |
| 543 | nfsm_dissect(tl, u_long *, 4 * NFSX_UNSIGNED); |
| 544 | if (nfsd->nd_nqlflag == NQL_NOVAL) { |
| 545 | off = (off_t)fxdr_unsigned(u_long, *++tl); |
| 546 | tl += 2; |
| 547 | } else { |
| 548 | fxdr_hyper(tl, &off); |
| 549 | tl += 2; |
| 550 | if (fxdr_unsigned(u_long, *tl++)) |
| 551 | ioflags |= IO_APPEND; |
| 552 | } |
| 553 | len = fxdr_unsigned(long, *tl); |
| 554 | if (len > NFS_MAXDATA || len <= 0) { |
| 555 | error = EBADRPC; |
| 556 | nfsm_reply(0); |
| 557 | } |
| 558 | if (dpos == (mtod(md, caddr_t)+md->m_len)) { |
| 559 | mp = md->m_next; |
| 560 | if (mp == NULL) { |
| 561 | error = EBADRPC; |
| 562 | nfsm_reply(0); |
| 563 | } |
| 564 | } else { |
| 565 | mp = md; |
| 566 | siz = dpos-mtod(mp, caddr_t); |
| 567 | mp->m_len -= siz; |
| 568 | NFSMADV(mp, siz); |
| 569 | } |
| 570 | if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred, nfsd->nd_slp, nam, &rdonly)) |
| 571 | nfsm_reply(0); |
| 572 | if (vp->v_type != VREG) { |
| 573 | error = (vp->v_type == VDIR) ? EISDIR : EACCES; |
| 574 | vput(vp); |
| 575 | nfsm_reply(0); |
| 576 | } |
| 577 | nqsrv_getl(vp, NQL_WRITE); |
| 578 | if (error = nfsrv_access(vp, VWRITE, cred, rdonly, nfsd->nd_procp)) { |
| 579 | vput(vp); |
| 580 | nfsm_reply(0); |
| 581 | } |
| 582 | uiop->uio_resid = 0; |
| 583 | uiop->uio_rw = UIO_WRITE; |
| 584 | uiop->uio_segflg = UIO_SYSSPACE; |
| 585 | uiop->uio_procp = (struct proc *)0; |
| 586 | /* |
| 587 | * Do up to NFS_MAXIOVEC mbufs of write each iteration of the |
| 588 | * loop until done. |
| 589 | */ |
| 590 | while (len > 0 && uiop->uio_resid == 0) { |
| 591 | ivp = iv; |
| 592 | siz = 0; |
| 593 | uiop->uio_iov = ivp; |
| 594 | uiop->uio_iovcnt = 0; |
| 595 | uiop->uio_offset = off; |
| 596 | while (len > 0 && uiop->uio_iovcnt < NFS_MAXIOVEC && mp != NULL) { |
| 597 | ivp->iov_base = mtod(mp, caddr_t); |
| 598 | if (len < mp->m_len) |
| 599 | ivp->iov_len = xfer = len; |
| 600 | else |
| 601 | ivp->iov_len = xfer = mp->m_len; |
| 602 | #ifdef notdef |
| 603 | /* Not Yet .. */ |
| 604 | if (M_HASCL(mp) && (((u_long)ivp->iov_base) & CLOFSET) == 0) |
| 605 | ivp->iov_op = NULL; /* what should it be ?? */ |
| 606 | else |
| 607 | ivp->iov_op = NULL; |
| 608 | #endif |
| 609 | uiop->uio_iovcnt++; |
| 610 | ivp++; |
| 611 | len -= xfer; |
| 612 | siz += xfer; |
| 613 | mp = mp->m_next; |
| 614 | } |
| 615 | if (len > 0 && mp == NULL) { |
| 616 | error = EBADRPC; |
| 617 | vput(vp); |
| 618 | nfsm_reply(0); |
| 619 | } |
| 620 | uiop->uio_resid = siz; |
| 621 | if (error = VOP_WRITE(vp, uiop, ioflags, cred)) { |
| 622 | vput(vp); |
| 623 | nfsm_reply(0); |
| 624 | } |
| 625 | off = uiop->uio_offset; |
| 626 | } |
| 627 | error = VOP_GETATTR(vp, vap, cred, nfsd->nd_procp); |
| 628 | vput(vp); |
| 629 | nfsm_reply(NFSX_FATTR(nfsd->nd_nqlflag != NQL_NOVAL)); |
| 630 | nfsm_build(fp, struct nfsv2_fattr *, NFSX_FATTR(nfsd->nd_nqlflag != NQL_NOVAL)); |
| 631 | nfsm_srvfillattr; |
| 632 | if (nfsd->nd_nqlflag != NQL_NOVAL) { |
| 633 | nfsm_build(tl, u_long *, 2*NFSX_UNSIGNED); |
| 634 | txdr_hyper(&vap->va_filerev, tl); |
| 635 | } |
| 636 | nfsm_srvdone; |
| 637 | } |
| 638 | |
| 639 | /* |
| 640 | * nfs create service |
| 641 | * now does a truncate to 0 length via. setattr if it already exists |
| 642 | */ |
| 643 | nfsrv_create(nfsd, mrep, md, dpos, cred, nam, mrq) |
| 644 | struct nfsd *nfsd; |
| 645 | struct mbuf *mrep, *md; |
| 646 | caddr_t dpos; |
| 647 | struct ucred *cred; |
| 648 | struct mbuf *nam, **mrq; |
| 649 | { |
| 650 | register struct nfsv2_fattr *fp; |
| 651 | struct vattr va; |
| 652 | register struct vattr *vap = &va; |
| 653 | register struct nfsv2_sattr *sp; |
| 654 | register u_long *tl; |
| 655 | struct nameidata nd; |
| 656 | register caddr_t cp; |
| 657 | register long t1; |
| 658 | caddr_t bpos; |
| 659 | int error = 0, rdev, cache, len, tsize; |
| 660 | char *cp2; |
| 661 | struct mbuf *mb, *mb2, *mreq; |
| 662 | struct vnode *vp; |
| 663 | nfsv2fh_t nfh; |
| 664 | fhandle_t *fhp; |
| 665 | u_quad_t frev; |
| 666 | |
| 667 | nd.ni_cnd.cn_nameiop = 0; |
| 668 | fhp = &nfh.fh_generic; |
| 669 | nfsm_srvmtofh(fhp); |
| 670 | nfsm_srvstrsiz(len, NFS_MAXNAMLEN); |
| 671 | nd.ni_cnd.cn_cred = cred; |
| 672 | nd.ni_cnd.cn_nameiop = CREATE; |
| 673 | nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | SAVESTART; |
| 674 | if (error = nfs_namei(&nd, fhp, len, nfsd->nd_slp, nam, &md, &dpos, |
| 675 | nfsd->nd_procp)) |
| 676 | nfsm_reply(0); |
| 677 | VATTR_NULL(vap); |
| 678 | nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_SATTR(nfsd->nd_nqlflag != NQL_NOVAL)); |
| 679 | /* |
| 680 | * Iff doesn't exist, create it |
| 681 | * otherwise just truncate to 0 length |
| 682 | * should I set the mode too ?? |
| 683 | */ |
| 684 | if (nd.ni_vp == NULL) { |
| 685 | vap->va_type = IFTOVT(fxdr_unsigned(u_long, sp->sa_mode)); |
| 686 | if (vap->va_type == VNON) |
| 687 | vap->va_type = VREG; |
| 688 | vap->va_mode = nfstov_mode(sp->sa_mode); |
| 689 | if (nfsd->nd_nqlflag == NQL_NOVAL) |
| 690 | rdev = fxdr_unsigned(long, sp->sa_nfssize); |
| 691 | else |
| 692 | rdev = fxdr_unsigned(long, sp->sa_nqrdev); |
| 693 | if (vap->va_type == VREG || vap->va_type == VSOCK) { |
| 694 | p->p_spare[1]--; |
| 695 | vrele(nd.ni_startdir); |
| 696 | nqsrv_getl(nd.ni_dvp, NQL_WRITE); |
| 697 | if (error = VOP_CREATE(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, vap)) |
| 698 | nfsm_reply(0); |
| 699 | FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI); |
| 700 | } else if (vap->va_type == VCHR || vap->va_type == VBLK || |
| 701 | vap->va_type == VFIFO) { |
| 702 | if (vap->va_type == VCHR && rdev == 0xffffffff) |
| 703 | vap->va_type = VFIFO; |
| 704 | if (vap->va_type == VFIFO) { |
| 705 | #ifndef FIFO |
| 706 | VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); |
| 707 | vput(nd.ni_dvp); |
| 708 | error = ENXIO; |
| 709 | goto out; |
| 710 | #endif /* FIFO */ |
| 711 | } else if (error = suser(cred, (u_short *)0)) { |
| 712 | VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); |
| 713 | vput(nd.ni_dvp); |
| 714 | goto out; |
| 715 | } else |
| 716 | vap->va_rdev = (dev_t)rdev; |
| 717 | nqsrv_getl(nd.ni_dvp, NQL_WRITE); |
| 718 | if (error = VOP_MKNOD(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, vap)) { |
| 719 | p->p_spare[1]--; |
| 720 | vrele(nd.ni_startdir); |
| 721 | nfsm_reply(0); |
| 722 | } |
| 723 | nd.ni_cnd.cn_nameiop = LOOKUP; |
| 724 | nd.ni_cnd.cn_flags &= ~(LOCKPARENT | SAVESTART); |
| 725 | nd.ni_cnd.cn_proc = nfsd->nd_procp; |
| 726 | nd.ni_cnd.cn_cred = nfsd->nd_procp->p_ucred; |
| 727 | if (error = lookup(&nd)) { |
| 728 | free(nd.ni_cnd.cn_pnbuf, M_NAMEI); |
| 729 | nfsm_reply(0); |
| 730 | } |
| 731 | FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI); |
| 732 | if (nd.ni_cnd.cn_flags & ISSYMLINK) { |
| 733 | vrele(nd.ni_dvp); |
| 734 | vput(nd.ni_vp); |
| 735 | VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); |
| 736 | error = EINVAL; |
| 737 | nfsm_reply(0); |
| 738 | } |
| 739 | } else { |
| 740 | VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); |
| 741 | vput(nd.ni_dvp); |
| 742 | error = ENXIO; |
| 743 | goto out; |
| 744 | } |
| 745 | vp = nd.ni_vp; |
| 746 | } else { |
| 747 | p->p_spare[1]--; |
| 748 | vrele(nd.ni_startdir); |
| 749 | free(nd.ni_cnd.cn_pnbuf, M_NAMEI); |
| 750 | vp = nd.ni_vp; |
| 751 | if (nd.ni_dvp == vp) |
| 752 | vrele(nd.ni_dvp); |
| 753 | else |
| 754 | vput(nd.ni_dvp); |
| 755 | VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); |
| 756 | if (nfsd->nd_nqlflag == NQL_NOVAL) { |
| 757 | tsize = fxdr_unsigned(long, sp->sa_nfssize); |
| 758 | if (tsize != -1) |
| 759 | vap->va_size = (u_quad_t)tsize; |
| 760 | else |
| 761 | vap->va_size = -1; |
| 762 | } else |
| 763 | fxdr_hyper(&sp->sa_nqsize, &vap->va_size); |
| 764 | if (vap->va_size != -1) { |
| 765 | if (error = nfsrv_access(vp, VWRITE, cred, |
| 766 | (nd.ni_cnd.cn_flags & RDONLY), nfsd->nd_procp)) { |
| 767 | vput(vp); |
| 768 | nfsm_reply(0); |
| 769 | } |
| 770 | nqsrv_getl(vp, NQL_WRITE); |
| 771 | if (error = VOP_SETATTR(vp, vap, cred, nfsd->nd_procp)) { |
| 772 | vput(vp); |
| 773 | nfsm_reply(0); |
| 774 | } |
| 775 | } |
| 776 | } |
| 777 | bzero((caddr_t)fhp, sizeof(nfh)); |
| 778 | fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; |
| 779 | if (error = VFS_VPTOFH(vp, &fhp->fh_fid)) { |
| 780 | vput(vp); |
| 781 | nfsm_reply(0); |
| 782 | } |
| 783 | error = VOP_GETATTR(vp, vap, cred, nfsd->nd_procp); |
| 784 | vput(vp); |
| 785 | nfsm_reply(NFSX_FH+NFSX_FATTR(nfsd->nd_nqlflag != NQL_NOVAL)); |
| 786 | nfsm_srvfhtom(fhp); |
| 787 | nfsm_build(fp, struct nfsv2_fattr *, NFSX_FATTR(nfsd->nd_nqlflag != NQL_NOVAL)); |
| 788 | nfsm_srvfillattr; |
| 789 | return (error); |
| 790 | nfsmout: |
| 791 | if (nd.ni_cnd.cn_nameiop || nd.ni_cnd.cn_flags) |
| 792 | p->p_spare[1]--, vrele(nd.ni_startdir); |
| 793 | VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); |
| 794 | if (nd.ni_dvp == nd.ni_vp) |
| 795 | vrele(nd.ni_dvp); |
| 796 | else |
| 797 | vput(nd.ni_dvp); |
| 798 | if (nd.ni_vp) |
| 799 | vput(nd.ni_vp); |
| 800 | return (error); |
| 801 | |
| 802 | out: |
| 803 | p->p_spare[1]--; |
| 804 | vrele(nd.ni_startdir); |
| 805 | free(nd.ni_cnd.cn_pnbuf, M_NAMEI); |
| 806 | nfsm_reply(0); |
| 807 | } |
| 808 | |
| 809 | /* |
| 810 | * nfs remove service |
| 811 | */ |
| 812 | nfsrv_remove(nfsd, mrep, md, dpos, cred, nam, mrq) |
| 813 | struct nfsd *nfsd; |
| 814 | struct mbuf *mrep, *md; |
| 815 | caddr_t dpos; |
| 816 | struct ucred *cred; |
| 817 | struct mbuf *nam, **mrq; |
| 818 | { |
| 819 | struct nameidata nd; |
| 820 | register u_long *tl; |
| 821 | register long t1; |
| 822 | caddr_t bpos; |
| 823 | int error = 0, cache, len; |
| 824 | char *cp2; |
| 825 | struct mbuf *mb, *mreq; |
| 826 | struct vnode *vp; |
| 827 | nfsv2fh_t nfh; |
| 828 | fhandle_t *fhp; |
| 829 | u_quad_t frev; |
| 830 | |
| 831 | fhp = &nfh.fh_generic; |
| 832 | nfsm_srvmtofh(fhp); |
| 833 | nfsm_srvstrsiz(len, NFS_MAXNAMLEN); |
| 834 | nd.ni_cnd.cn_cred = cred; |
| 835 | nd.ni_cnd.cn_nameiop = DELETE; |
| 836 | nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; |
| 837 | if (error = nfs_namei(&nd, fhp, len, nfsd->nd_slp, nam, &md, &dpos, |
| 838 | nfsd->nd_procp)) |
| 839 | nfsm_reply(0); |
| 840 | vp = nd.ni_vp; |
| 841 | if (vp->v_type == VDIR && |
| 842 | (error = suser(cred, (u_short *)0))) |
| 843 | goto out; |
| 844 | /* |
| 845 | * The root of a mounted filesystem cannot be deleted. |
| 846 | */ |
| 847 | if (vp->v_flag & VROOT) { |
| 848 | error = EBUSY; |
| 849 | goto out; |
| 850 | } |
| 851 | if (vp->v_flag & VTEXT) |
| 852 | (void) vnode_pager_uncache(vp); |
| 853 | out: |
| 854 | if (!error) { |
| 855 | nqsrv_getl(nd.ni_dvp, NQL_WRITE); |
| 856 | nqsrv_getl(vp, NQL_WRITE); |
| 857 | error = VOP_REMOVE(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); |
| 858 | } else { |
| 859 | VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); |
| 860 | if (nd.ni_dvp == vp) |
| 861 | vrele(nd.ni_dvp); |
| 862 | else |
| 863 | vput(nd.ni_dvp); |
| 864 | vput(vp); |
| 865 | } |
| 866 | nfsm_reply(0); |
| 867 | nfsm_srvdone; |
| 868 | } |
| 869 | |
| 870 | /* |
| 871 | * nfs rename service |
| 872 | */ |
| 873 | nfsrv_rename(nfsd, mrep, md, dpos, cred, nam, mrq) |
| 874 | struct nfsd *nfsd; |
| 875 | struct mbuf *mrep, *md; |
| 876 | caddr_t dpos; |
| 877 | struct ucred *cred; |
| 878 | struct mbuf *nam, **mrq; |
| 879 | { |
| 880 | register u_long *tl; |
| 881 | register long t1; |
| 882 | caddr_t bpos; |
| 883 | int error = 0, cache, len, len2; |
| 884 | char *cp2; |
| 885 | struct mbuf *mb, *mreq; |
| 886 | struct nameidata fromnd, tond; |
| 887 | struct vnode *fvp, *tvp, *tdvp; |
| 888 | nfsv2fh_t fnfh, tnfh; |
| 889 | fhandle_t *ffhp, *tfhp; |
| 890 | u_quad_t frev; |
| 891 | uid_t saved_uid; |
| 892 | |
| 893 | ffhp = &fnfh.fh_generic; |
| 894 | tfhp = &tnfh.fh_generic; |
| 895 | fromnd.ni_cnd.cn_nameiop = 0; |
| 896 | tond.ni_cnd.cn_nameiop = 0; |
| 897 | nfsm_srvmtofh(ffhp); |
| 898 | nfsm_srvstrsiz(len, NFS_MAXNAMLEN); |
| 899 | /* |
| 900 | * Remember our original uid so that we can reset cr_uid before |
| 901 | * the second nfs_namei() call, in case it is remapped. |
| 902 | */ |
| 903 | saved_uid = cred->cr_uid; |
| 904 | fromnd.ni_cnd.cn_cred = cred; |
| 905 | fromnd.ni_cnd.cn_nameiop = DELETE; |
| 906 | fromnd.ni_cnd.cn_flags = WANTPARENT | SAVESTART; |
| 907 | if (error = nfs_namei(&fromnd, ffhp, len, nfsd->nd_slp, nam, &md, |
| 908 | &dpos, nfsd->nd_procp)) |
| 909 | nfsm_reply(0); |
| 910 | fvp = fromnd.ni_vp; |
| 911 | nfsm_srvmtofh(tfhp); |
| 912 | nfsm_strsiz(len2, NFS_MAXNAMLEN); |
| 913 | cred->cr_uid = saved_uid; |
| 914 | tond.ni_cnd.cn_cred = cred; |
| 915 | tond.ni_cnd.cn_nameiop = RENAME; |
| 916 | tond.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF | NOCACHE | SAVESTART; |
| 917 | if (error = nfs_namei(&tond, tfhp, len2, nfsd->nd_slp, nam, &md, |
| 918 | &dpos, nfsd->nd_procp)) { |
| 919 | VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); |
| 920 | vrele(fromnd.ni_dvp); |
| 921 | vrele(fvp); |
| 922 | goto out1; |
| 923 | } |
| 924 | tdvp = tond.ni_dvp; |
| 925 | tvp = tond.ni_vp; |
| 926 | if (tvp != NULL) { |
| 927 | if (fvp->v_type == VDIR && tvp->v_type != VDIR) { |
| 928 | error = EISDIR; |
| 929 | goto out; |
| 930 | } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { |
| 931 | error = ENOTDIR; |
| 932 | goto out; |
| 933 | } |
| 934 | if (tvp->v_type == VDIR && tvp->v_mountedhere) { |
| 935 | error = EXDEV; |
| 936 | goto out; |
| 937 | } |
| 938 | } |
| 939 | if (fvp->v_type == VDIR && fvp->v_mountedhere) { |
| 940 | error = EBUSY; |
| 941 | goto out; |
| 942 | } |
| 943 | if (fvp->v_mount != tdvp->v_mount) { |
| 944 | error = EXDEV; |
| 945 | goto out; |
| 946 | } |
| 947 | if (fvp == tdvp) |
| 948 | error = EINVAL; |
| 949 | /* |
| 950 | * If source is the same as the destination (that is the |
| 951 | * same vnode with the same name in the same directory), |
| 952 | * then there is nothing to do. |
| 953 | */ |
| 954 | if (fvp == tvp && fromnd.ni_dvp == tdvp && |
| 955 | fromnd.ni_cnd.cn_namelen == tond.ni_cnd.cn_namelen && |
| 956 | !bcmp(fromnd.ni_cnd.cn_nameptr, tond.ni_cnd.cn_nameptr, |
| 957 | fromnd.ni_cnd.cn_namelen)) |
| 958 | error = -1; |
| 959 | out: |
| 960 | if (!error) { |
| 961 | nqsrv_getl(fromnd.ni_dvp, NQL_WRITE); |
| 962 | nqsrv_getl(tdvp, NQL_WRITE); |
| 963 | if (tvp) |
| 964 | nqsrv_getl(tvp, NQL_WRITE); |
| 965 | error = VOP_RENAME(fromnd.ni_dvp, fromnd.ni_vp, &fromnd.ni_cnd, |
| 966 | tond.ni_dvp, tond.ni_vp, &tond.ni_cnd); |
| 967 | } else { |
| 968 | VOP_ABORTOP(tond.ni_dvp, &tond.ni_cnd); |
| 969 | if (tdvp == tvp) |
| 970 | vrele(tdvp); |
| 971 | else |
| 972 | vput(tdvp); |
| 973 | if (tvp) |
| 974 | vput(tvp); |
| 975 | VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); |
| 976 | vrele(fromnd.ni_dvp); |
| 977 | vrele(fvp); |
| 978 | } |
| 979 | p->p_spare[1]--; |
| 980 | vrele(tond.ni_startdir); |
| 981 | FREE(tond.ni_cnd.cn_pnbuf, M_NAMEI); |
| 982 | out1: |
| 983 | p->p_spare[1]--; |
| 984 | vrele(fromnd.ni_startdir); |
| 985 | FREE(fromnd.ni_cnd.cn_pnbuf, M_NAMEI); |
| 986 | nfsm_reply(0); |
| 987 | return (error); |
| 988 | |
| 989 | nfsmout: |
| 990 | if (tond.ni_cnd.cn_nameiop || tond.ni_cnd.cn_flags) { |
| 991 | p->p_spare[1]--; |
| 992 | vrele(tond.ni_startdir); |
| 993 | FREE(tond.ni_cnd.cn_pnbuf, M_NAMEI); |
| 994 | } |
| 995 | if (fromnd.ni_cnd.cn_nameiop || fromnd.ni_cnd.cn_flags) { |
| 996 | p->p_spare[1]--; |
| 997 | vrele(fromnd.ni_startdir); |
| 998 | FREE(fromnd.ni_cnd.cn_pnbuf, M_NAMEI); |
| 999 | VOP_ABORTOP(fromnd.ni_dvp, &fromnd.ni_cnd); |
| 1000 | vrele(fromnd.ni_dvp); |
| 1001 | vrele(fvp); |
| 1002 | } |
| 1003 | return (error); |
| 1004 | } |
| 1005 | |
| 1006 | /* |
| 1007 | * nfs link service |
| 1008 | */ |
| 1009 | nfsrv_link(nfsd, mrep, md, dpos, cred, nam, mrq) |
| 1010 | struct nfsd *nfsd; |
| 1011 | struct mbuf *mrep, *md; |
| 1012 | caddr_t dpos; |
| 1013 | struct ucred *cred; |
| 1014 | struct mbuf *nam, **mrq; |
| 1015 | { |
| 1016 | struct nameidata nd; |
| 1017 | register u_long *tl; |
| 1018 | register long t1; |
| 1019 | caddr_t bpos; |
| 1020 | int error = 0, rdonly, cache, len; |
| 1021 | char *cp2; |
| 1022 | struct mbuf *mb, *mreq; |
| 1023 | struct vnode *vp, *xp; |
| 1024 | nfsv2fh_t nfh, dnfh; |
| 1025 | fhandle_t *fhp, *dfhp; |
| 1026 | u_quad_t frev; |
| 1027 | |
| 1028 | fhp = &nfh.fh_generic; |
| 1029 | dfhp = &dnfh.fh_generic; |
| 1030 | nfsm_srvmtofh(fhp); |
| 1031 | nfsm_srvmtofh(dfhp); |
| 1032 | nfsm_srvstrsiz(len, NFS_MAXNAMLEN); |
| 1033 | if (error = nfsrv_fhtovp(fhp, FALSE, &vp, cred, nfsd->nd_slp, nam, &rdonly)) |
| 1034 | nfsm_reply(0); |
| 1035 | if (vp->v_type == VDIR && (error = suser(cred, (u_short *)0))) |
| 1036 | goto out1; |
| 1037 | nd.ni_cnd.cn_cred = cred; |
| 1038 | nd.ni_cnd.cn_nameiop = CREATE; |
| 1039 | nd.ni_cnd.cn_flags = LOCKPARENT; |
| 1040 | if (error = nfs_namei(&nd, dfhp, len, nfsd->nd_slp, nam, &md, &dpos, |
| 1041 | nfsd->nd_procp)) |
| 1042 | goto out1; |
| 1043 | xp = nd.ni_vp; |
| 1044 | if (xp != NULL) { |
| 1045 | error = EEXIST; |
| 1046 | goto out; |
| 1047 | } |
| 1048 | xp = nd.ni_dvp; |
| 1049 | if (vp->v_mount != xp->v_mount) |
| 1050 | error = EXDEV; |
| 1051 | out: |
| 1052 | if (!error) { |
| 1053 | nqsrv_getl(vp, NQL_WRITE); |
| 1054 | nqsrv_getl(xp, NQL_WRITE); |
| 1055 | error = VOP_LINK(nd.ni_dvp, vp, &nd.ni_cnd); |
| 1056 | } else { |
| 1057 | VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); |
| 1058 | if (nd.ni_dvp == nd.ni_vp) |
| 1059 | vrele(nd.ni_dvp); |
| 1060 | else |
| 1061 | vput(nd.ni_dvp); |
| 1062 | if (nd.ni_vp) |
| 1063 | vrele(nd.ni_vp); |
| 1064 | } |
| 1065 | out1: |
| 1066 | vrele(vp); |
| 1067 | nfsm_reply(0); |
| 1068 | nfsm_srvdone; |
| 1069 | } |
| 1070 | |
| 1071 | /* |
| 1072 | * nfs symbolic link service |
| 1073 | */ |
| 1074 | nfsrv_symlink(nfsd, mrep, md, dpos, cred, nam, mrq) |
| 1075 | struct nfsd *nfsd; |
| 1076 | struct mbuf *mrep, *md; |
| 1077 | caddr_t dpos; |
| 1078 | struct ucred *cred; |
| 1079 | struct mbuf *nam, **mrq; |
| 1080 | { |
| 1081 | struct vattr va; |
| 1082 | struct nameidata nd; |
| 1083 | register struct vattr *vap = &va; |
| 1084 | register u_long *tl; |
| 1085 | register long t1; |
| 1086 | struct nfsv2_sattr *sp; |
| 1087 | caddr_t bpos; |
| 1088 | struct uio io; |
| 1089 | struct iovec iv; |
| 1090 | int error = 0, cache, len, len2; |
| 1091 | char *pathcp, *cp2; |
| 1092 | struct mbuf *mb, *mreq; |
| 1093 | nfsv2fh_t nfh; |
| 1094 | fhandle_t *fhp; |
| 1095 | u_quad_t frev; |
| 1096 | |
| 1097 | pathcp = (char *)0; |
| 1098 | fhp = &nfh.fh_generic; |
| 1099 | nfsm_srvmtofh(fhp); |
| 1100 | nfsm_srvstrsiz(len, NFS_MAXNAMLEN); |
| 1101 | nd.ni_cnd.cn_cred = cred; |
| 1102 | nd.ni_cnd.cn_nameiop = CREATE; |
| 1103 | nd.ni_cnd.cn_flags = LOCKPARENT; |
| 1104 | if (error = nfs_namei(&nd, fhp, len, nfsd->nd_slp, nam, &md, &dpos, |
| 1105 | nfsd->nd_procp)) |
| 1106 | goto out; |
| 1107 | nfsm_strsiz(len2, NFS_MAXPATHLEN); |
| 1108 | MALLOC(pathcp, caddr_t, len2 + 1, M_TEMP, M_WAITOK); |
| 1109 | iv.iov_base = pathcp; |
| 1110 | iv.iov_len = len2; |
| 1111 | io.uio_resid = len2; |
| 1112 | io.uio_offset = 0; |
| 1113 | io.uio_iov = &iv; |
| 1114 | io.uio_iovcnt = 1; |
| 1115 | io.uio_segflg = UIO_SYSSPACE; |
| 1116 | io.uio_rw = UIO_READ; |
| 1117 | io.uio_procp = (struct proc *)0; |
| 1118 | nfsm_mtouio(&io, len2); |
| 1119 | nfsm_dissect(sp, struct nfsv2_sattr *, NFSX_SATTR(nfsd->nd_nqlflag != NQL_NOVAL)); |
| 1120 | *(pathcp + len2) = '\0'; |
| 1121 | if (nd.ni_vp) { |
| 1122 | VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); |
| 1123 | if (nd.ni_dvp == nd.ni_vp) |
| 1124 | vrele(nd.ni_dvp); |
| 1125 | else |
| 1126 | vput(nd.ni_dvp); |
| 1127 | vrele(nd.ni_vp); |
| 1128 | error = EEXIST; |
| 1129 | goto out; |
| 1130 | } |
| 1131 | VATTR_NULL(vap); |
| 1132 | vap->va_mode = fxdr_unsigned(u_short, sp->sa_mode); |
| 1133 | nqsrv_getl(nd.ni_dvp, NQL_WRITE); |
| 1134 | error = VOP_SYMLINK(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, vap, pathcp); |
| 1135 | out: |
| 1136 | if (pathcp) |
| 1137 | FREE(pathcp, M_TEMP); |
| 1138 | nfsm_reply(0); |
| 1139 | return (error); |
| 1140 | nfsmout: |
| 1141 | VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); |
| 1142 | if (nd.ni_dvp == nd.ni_vp) |
| 1143 | vrele(nd.ni_dvp); |
| 1144 | else |
| 1145 | vput(nd.ni_dvp); |
| 1146 | if (nd.ni_vp) |
| 1147 | vrele(nd.ni_vp); |
| 1148 | if (pathcp) |
| 1149 | FREE(pathcp, M_TEMP); |
| 1150 | return (error); |
| 1151 | } |
| 1152 | |
| 1153 | /* |
| 1154 | * nfs mkdir service |
| 1155 | */ |
| 1156 | nfsrv_mkdir(nfsd, mrep, md, dpos, cred, nam, mrq) |
| 1157 | struct nfsd *nfsd; |
| 1158 | struct mbuf *mrep, *md; |
| 1159 | caddr_t dpos; |
| 1160 | struct ucred *cred; |
| 1161 | struct mbuf *nam, **mrq; |
| 1162 | { |
| 1163 | struct vattr va; |
| 1164 | register struct vattr *vap = &va; |
| 1165 | register struct nfsv2_fattr *fp; |
| 1166 | struct nameidata nd; |
| 1167 | register caddr_t cp; |
| 1168 | register u_long *tl; |
| 1169 | register long t1; |
| 1170 | caddr_t bpos; |
| 1171 | int error = 0, cache, len; |
| 1172 | char *cp2; |
| 1173 | struct mbuf *mb, *mb2, *mreq; |
| 1174 | struct vnode *vp; |
| 1175 | nfsv2fh_t nfh; |
| 1176 | fhandle_t *fhp; |
| 1177 | u_quad_t frev; |
| 1178 | |
| 1179 | fhp = &nfh.fh_generic; |
| 1180 | nfsm_srvmtofh(fhp); |
| 1181 | nfsm_srvstrsiz(len, NFS_MAXNAMLEN); |
| 1182 | nd.ni_cnd.cn_cred = cred; |
| 1183 | nd.ni_cnd.cn_nameiop = CREATE; |
| 1184 | nd.ni_cnd.cn_flags = LOCKPARENT; |
| 1185 | if (error = nfs_namei(&nd, fhp, len, nfsd->nd_slp, nam, &md, &dpos, |
| 1186 | nfsd->nd_procp)) |
| 1187 | nfsm_reply(0); |
| 1188 | nfsm_dissect(tl, u_long *, NFSX_UNSIGNED); |
| 1189 | VATTR_NULL(vap); |
| 1190 | vap->va_type = VDIR; |
| 1191 | vap->va_mode = nfstov_mode(*tl++); |
| 1192 | vp = nd.ni_vp; |
| 1193 | if (vp != NULL) { |
| 1194 | VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); |
| 1195 | if (nd.ni_dvp == vp) |
| 1196 | vrele(nd.ni_dvp); |
| 1197 | else |
| 1198 | vput(nd.ni_dvp); |
| 1199 | vrele(vp); |
| 1200 | error = EEXIST; |
| 1201 | nfsm_reply(0); |
| 1202 | } |
| 1203 | nqsrv_getl(nd.ni_dvp, NQL_WRITE); |
| 1204 | if (error = VOP_MKDIR(nd.ni_dvp, &nd.ni_vp, &nd.ni_cnd, vap)) |
| 1205 | nfsm_reply(0); |
| 1206 | vp = nd.ni_vp; |
| 1207 | bzero((caddr_t)fhp, sizeof(nfh)); |
| 1208 | fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; |
| 1209 | if (error = VFS_VPTOFH(vp, &fhp->fh_fid)) { |
| 1210 | vput(vp); |
| 1211 | nfsm_reply(0); |
| 1212 | } |
| 1213 | error = VOP_GETATTR(vp, vap, cred, nfsd->nd_procp); |
| 1214 | vput(vp); |
| 1215 | nfsm_reply(NFSX_FH+NFSX_FATTR(nfsd->nd_nqlflag != NQL_NOVAL)); |
| 1216 | nfsm_srvfhtom(fhp); |
| 1217 | nfsm_build(fp, struct nfsv2_fattr *, NFSX_FATTR(nfsd->nd_nqlflag != NQL_NOVAL)); |
| 1218 | nfsm_srvfillattr; |
| 1219 | return (error); |
| 1220 | nfsmout: |
| 1221 | VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); |
| 1222 | if (nd.ni_dvp == nd.ni_vp) |
| 1223 | vrele(nd.ni_dvp); |
| 1224 | else |
| 1225 | vput(nd.ni_dvp); |
| 1226 | if (nd.ni_vp) |
| 1227 | vrele(nd.ni_vp); |
| 1228 | return (error); |
| 1229 | } |
| 1230 | |
| 1231 | /* |
| 1232 | * nfs rmdir service |
| 1233 | */ |
| 1234 | nfsrv_rmdir(nfsd, mrep, md, dpos, cred, nam, mrq) |
| 1235 | struct nfsd *nfsd; |
| 1236 | struct mbuf *mrep, *md; |
| 1237 | caddr_t dpos; |
| 1238 | struct ucred *cred; |
| 1239 | struct mbuf *nam, **mrq; |
| 1240 | { |
| 1241 | register u_long *tl; |
| 1242 | register long t1; |
| 1243 | caddr_t bpos; |
| 1244 | int error = 0, cache, len; |
| 1245 | char *cp2; |
| 1246 | struct mbuf *mb, *mreq; |
| 1247 | struct vnode *vp; |
| 1248 | nfsv2fh_t nfh; |
| 1249 | fhandle_t *fhp; |
| 1250 | struct nameidata nd; |
| 1251 | u_quad_t frev; |
| 1252 | |
| 1253 | fhp = &nfh.fh_generic; |
| 1254 | nfsm_srvmtofh(fhp); |
| 1255 | nfsm_srvstrsiz(len, NFS_MAXNAMLEN); |
| 1256 | nd.ni_cnd.cn_cred = cred; |
| 1257 | nd.ni_cnd.cn_nameiop = DELETE; |
| 1258 | nd.ni_cnd.cn_flags = LOCKPARENT | LOCKLEAF; |
| 1259 | if (error = nfs_namei(&nd, fhp, len, nfsd->nd_slp, nam, &md, &dpos, |
| 1260 | nfsd->nd_procp)) |
| 1261 | nfsm_reply(0); |
| 1262 | vp = nd.ni_vp; |
| 1263 | if (vp->v_type != VDIR) { |
| 1264 | error = ENOTDIR; |
| 1265 | goto out; |
| 1266 | } |
| 1267 | /* |
| 1268 | * No rmdir "." please. |
| 1269 | */ |
| 1270 | if (nd.ni_dvp == vp) { |
| 1271 | error = EINVAL; |
| 1272 | goto out; |
| 1273 | } |
| 1274 | /* |
| 1275 | * The root of a mounted filesystem cannot be deleted. |
| 1276 | */ |
| 1277 | if (vp->v_flag & VROOT) |
| 1278 | error = EBUSY; |
| 1279 | out: |
| 1280 | if (!error) { |
| 1281 | nqsrv_getl(nd.ni_dvp, NQL_WRITE); |
| 1282 | nqsrv_getl(vp, NQL_WRITE); |
| 1283 | error = VOP_RMDIR(nd.ni_dvp, nd.ni_vp, &nd.ni_cnd); |
| 1284 | } else { |
| 1285 | VOP_ABORTOP(nd.ni_dvp, &nd.ni_cnd); |
| 1286 | if (nd.ni_dvp == nd.ni_vp) |
| 1287 | vrele(nd.ni_dvp); |
| 1288 | else |
| 1289 | vput(nd.ni_dvp); |
| 1290 | vput(vp); |
| 1291 | } |
| 1292 | nfsm_reply(0); |
| 1293 | nfsm_srvdone; |
| 1294 | } |
| 1295 | |
| 1296 | /* |
| 1297 | * nfs readdir service |
| 1298 | * - mallocs what it thinks is enough to read |
| 1299 | * count rounded up to a multiple of NFS_DIRBLKSIZ <= NFS_MAXREADDIR |
| 1300 | * - calls VOP_READDIR() |
| 1301 | * - loops around building the reply |
| 1302 | * if the output generated exceeds count break out of loop |
| 1303 | * The nfsm_clget macro is used here so that the reply will be packed |
| 1304 | * tightly in mbuf clusters. |
| 1305 | * - it only knows that it has encountered eof when the VOP_READDIR() |
| 1306 | * reads nothing |
| 1307 | * - as such one readdir rpc will return eof false although you are there |
| 1308 | * and then the next will return eof |
| 1309 | * - it trims out records with d_fileno == 0 |
| 1310 | * this doesn't matter for Unix clients, but they might confuse clients |
| 1311 | * for other os'. |
| 1312 | * NB: It is tempting to set eof to true if the VOP_READDIR() reads less |
| 1313 | * than requested, but this may not apply to all filesystems. For |
| 1314 | * example, client NFS does not { although it is never remote mounted |
| 1315 | * anyhow } |
| 1316 | * The alternate call nqnfsrv_readdirlook() does lookups as well. |
| 1317 | * PS: The NFS protocol spec. does not clarify what the "count" byte |
| 1318 | * argument is a count of.. just name strings and file id's or the |
| 1319 | * entire reply rpc or ... |
| 1320 | * I tried just file name and id sizes and it confused the Sun client, |
| 1321 | * so I am using the full rpc size now. The "paranoia.." comment refers |
| 1322 | * to including the status longwords that are not a part of the dir. |
| 1323 | * "entry" structures, but are in the rpc. |
| 1324 | */ |
| 1325 | struct flrep { |
| 1326 | u_long fl_cachable; |
| 1327 | u_long fl_duration; |
| 1328 | u_long fl_frev[2]; |
| 1329 | nfsv2fh_t fl_nfh; |
| 1330 | u_long fl_fattr[NFSX_NQFATTR / sizeof (u_long)]; |
| 1331 | }; |
| 1332 | |
| 1333 | nfsrv_readdir(nfsd, mrep, md, dpos, cred, nam, mrq) |
| 1334 | struct nfsd *nfsd; |
| 1335 | struct mbuf *mrep, *md; |
| 1336 | caddr_t dpos; |
| 1337 | struct ucred *cred; |
| 1338 | struct mbuf *nam, **mrq; |
| 1339 | { |
| 1340 | register char *bp, *be; |
| 1341 | register struct mbuf *mp; |
| 1342 | register struct dirent *dp; |
| 1343 | register caddr_t cp; |
| 1344 | register u_long *tl; |
| 1345 | register long t1; |
| 1346 | caddr_t bpos; |
| 1347 | struct mbuf *mb, *mb2, *mreq, *mp2; |
| 1348 | char *cpos, *cend, *cp2, *rbuf; |
| 1349 | struct vnode *vp; |
| 1350 | nfsv2fh_t nfh; |
| 1351 | fhandle_t *fhp; |
| 1352 | struct uio io; |
| 1353 | struct iovec iv; |
| 1354 | int len, nlen, rem, xfer, tsiz, i, error = 0; |
| 1355 | int siz, cnt, fullsiz, eofflag, rdonly, cache; |
| 1356 | u_quad_t frev; |
| 1357 | u_long off, *cookiebuf, *cookie; |
| 1358 | int ncookies; |
| 1359 | |
| 1360 | fhp = &nfh.fh_generic; |
| 1361 | nfsm_srvmtofh(fhp); |
| 1362 | nfsm_dissect(tl, u_long *, 2*NFSX_UNSIGNED); |
| 1363 | off = fxdr_unsigned(u_long, *tl++); |
| 1364 | cnt = fxdr_unsigned(int, *tl); |
| 1365 | siz = ((cnt+NFS_DIRBLKSIZ-1) & ~(NFS_DIRBLKSIZ-1)); |
| 1366 | if (cnt > NFS_MAXREADDIR) |
| 1367 | siz = NFS_MAXREADDIR; |
| 1368 | fullsiz = siz; |
| 1369 | ncookies = siz / 16; /* Guess at the number of cookies needed. */ |
| 1370 | if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred, nfsd->nd_slp, nam, &rdonly)) |
| 1371 | nfsm_reply(0); |
| 1372 | nqsrv_getl(vp, NQL_READ); |
| 1373 | if (error = nfsrv_access(vp, VEXEC, cred, rdonly, nfsd->nd_procp)) { |
| 1374 | vput(vp); |
| 1375 | nfsm_reply(0); |
| 1376 | } |
| 1377 | VOP_UNLOCK(vp); |
| 1378 | MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); |
| 1379 | MALLOC(cookiebuf, u_long *, ncookies * sizeof(*cookiebuf), M_TEMP, |
| 1380 | M_WAITOK); |
| 1381 | again: |
| 1382 | iv.iov_base = rbuf; |
| 1383 | iv.iov_len = fullsiz; |
| 1384 | io.uio_iov = &iv; |
| 1385 | io.uio_iovcnt = 1; |
| 1386 | io.uio_offset = (off_t)off; |
| 1387 | io.uio_resid = fullsiz; |
| 1388 | io.uio_segflg = UIO_SYSSPACE; |
| 1389 | io.uio_rw = UIO_READ; |
| 1390 | io.uio_procp = (struct proc *)0; |
| 1391 | error = VOP_READDIR(vp, &io, cred, &eofflag, cookiebuf, ncookies); |
| 1392 | cookie = cookiebuf; |
| 1393 | off = (off_t)io.uio_offset; |
| 1394 | if (error) { |
| 1395 | vrele(vp); |
| 1396 | free((caddr_t)cookiebuf, M_TEMP); |
| 1397 | free((caddr_t)rbuf, M_TEMP); |
| 1398 | nfsm_reply(0); |
| 1399 | } |
| 1400 | if (io.uio_resid) { |
| 1401 | siz -= io.uio_resid; |
| 1402 | |
| 1403 | /* |
| 1404 | * If nothing read, return eof |
| 1405 | * rpc reply |
| 1406 | */ |
| 1407 | if (siz == 0) { |
| 1408 | vrele(vp); |
| 1409 | nfsm_reply(2*NFSX_UNSIGNED); |
| 1410 | nfsm_build(tl, u_long *, 2*NFSX_UNSIGNED); |
| 1411 | *tl++ = nfs_false; |
| 1412 | *tl = nfs_true; |
| 1413 | FREE((caddr_t)cookiebuf, M_TEMP); |
| 1414 | FREE((caddr_t)rbuf, M_TEMP); |
| 1415 | return (0); |
| 1416 | } |
| 1417 | } |
| 1418 | |
| 1419 | /* |
| 1420 | * Check for degenerate cases of nothing useful read. |
| 1421 | * If so go try again |
| 1422 | */ |
| 1423 | cpos = rbuf; |
| 1424 | cend = rbuf + siz; |
| 1425 | while (cpos < cend) { |
| 1426 | dp = (struct dirent *)cpos; |
| 1427 | if (dp->d_fileno == 0) { |
| 1428 | cpos += dp->d_reclen; |
| 1429 | cookie++; |
| 1430 | } else |
| 1431 | break; |
| 1432 | } |
| 1433 | if (cpos >= cend) { |
| 1434 | siz = fullsiz; |
| 1435 | goto again; |
| 1436 | } |
| 1437 | |
| 1438 | len = 3*NFSX_UNSIGNED; /* paranoia, probably can be 0 */ |
| 1439 | nfsm_reply(siz); |
| 1440 | mp = mp2 = mb; |
| 1441 | bp = bpos; |
| 1442 | be = bp + M_TRAILINGSPACE(mp); |
| 1443 | |
| 1444 | /* Loop through the records and build reply */ |
| 1445 | while (cpos < cend) { |
| 1446 | if (dp->d_fileno != 0) { |
| 1447 | nlen = dp->d_namlen; |
| 1448 | rem = nfsm_rndup(nlen)-nlen; |
| 1449 | len += (4*NFSX_UNSIGNED + nlen + rem); |
| 1450 | if (len > cnt) { |
| 1451 | eofflag = 0; |
| 1452 | break; |
| 1453 | } |
| 1454 | /* |
| 1455 | * Build the directory record xdr from |
| 1456 | * the dirent entry. |
| 1457 | */ |
| 1458 | nfsm_clget; |
| 1459 | *tl = nfs_true; |
| 1460 | bp += NFSX_UNSIGNED; |
| 1461 | nfsm_clget; |
| 1462 | *tl = txdr_unsigned(dp->d_fileno); |
| 1463 | bp += NFSX_UNSIGNED; |
| 1464 | nfsm_clget; |
| 1465 | *tl = txdr_unsigned(nlen); |
| 1466 | bp += NFSX_UNSIGNED; |
| 1467 | |
| 1468 | /* And loop around copying the name */ |
| 1469 | xfer = nlen; |
| 1470 | cp = dp->d_name; |
| 1471 | while (xfer > 0) { |
| 1472 | nfsm_clget; |
| 1473 | if ((bp+xfer) > be) |
| 1474 | tsiz = be-bp; |
| 1475 | else |
| 1476 | tsiz = xfer; |
| 1477 | bcopy(cp, bp, tsiz); |
| 1478 | bp += tsiz; |
| 1479 | xfer -= tsiz; |
| 1480 | if (xfer > 0) |
| 1481 | cp += tsiz; |
| 1482 | } |
| 1483 | /* And null pad to a long boundary */ |
| 1484 | for (i = 0; i < rem; i++) |
| 1485 | *bp++ = '\0'; |
| 1486 | nfsm_clget; |
| 1487 | |
| 1488 | /* Finish off the record */ |
| 1489 | *tl = txdr_unsigned(*cookie); |
| 1490 | bp += NFSX_UNSIGNED; |
| 1491 | } |
| 1492 | cpos += dp->d_reclen; |
| 1493 | dp = (struct dirent *)cpos; |
| 1494 | cookie++; |
| 1495 | } |
| 1496 | vrele(vp); |
| 1497 | nfsm_clget; |
| 1498 | *tl = nfs_false; |
| 1499 | bp += NFSX_UNSIGNED; |
| 1500 | nfsm_clget; |
| 1501 | if (eofflag) |
| 1502 | *tl = nfs_true; |
| 1503 | else |
| 1504 | *tl = nfs_false; |
| 1505 | bp += NFSX_UNSIGNED; |
| 1506 | if (mp != mb) { |
| 1507 | if (bp < be) |
| 1508 | mp->m_len = bp - mtod(mp, caddr_t); |
| 1509 | } else |
| 1510 | mp->m_len += bp - bpos; |
| 1511 | FREE(cookiebuf, M_TEMP); |
| 1512 | FREE(rbuf, M_TEMP); |
| 1513 | nfsm_srvdone; |
| 1514 | } |
| 1515 | |
| 1516 | nqnfsrv_readdirlook(nfsd, mrep, md, dpos, cred, nam, mrq) |
| 1517 | struct nfsd *nfsd; |
| 1518 | struct mbuf *mrep, *md; |
| 1519 | caddr_t dpos; |
| 1520 | struct ucred *cred; |
| 1521 | struct mbuf *nam, **mrq; |
| 1522 | { |
| 1523 | register char *bp, *be; |
| 1524 | register struct mbuf *mp; |
| 1525 | register struct dirent *dp; |
| 1526 | register caddr_t cp; |
| 1527 | register u_long *tl; |
| 1528 | register long t1; |
| 1529 | caddr_t bpos; |
| 1530 | struct mbuf *mb, *mb2, *mreq, *mp2; |
| 1531 | char *cpos, *cend, *cp2, *rbuf; |
| 1532 | struct vnode *vp, *nvp; |
| 1533 | struct flrep fl; |
| 1534 | nfsv2fh_t nfh; |
| 1535 | fhandle_t *fhp; |
| 1536 | struct uio io; |
| 1537 | struct iovec iv; |
| 1538 | struct vattr va, *vap = &va; |
| 1539 | struct nfsv2_fattr *fp; |
| 1540 | int len, nlen, rem, xfer, tsiz, i, error = 0, duration2, cache2; |
| 1541 | int siz, cnt, fullsiz, eofflag, rdonly, cache; |
| 1542 | u_quad_t frev, frev2; |
| 1543 | u_long off, *cookiebuf, *cookie; |
| 1544 | int ncookies; |
| 1545 | |
| 1546 | fhp = &nfh.fh_generic; |
| 1547 | nfsm_srvmtofh(fhp); |
| 1548 | nfsm_dissect(tl, u_long *, 3*NFSX_UNSIGNED); |
| 1549 | off = fxdr_unsigned(u_long, *tl++); |
| 1550 | cnt = fxdr_unsigned(int, *tl++); |
| 1551 | duration2 = fxdr_unsigned(int, *tl); |
| 1552 | siz = ((cnt+NFS_DIRBLKSIZ-1) & ~(NFS_DIRBLKSIZ-1)); |
| 1553 | if (cnt > NFS_MAXREADDIR) |
| 1554 | siz = NFS_MAXREADDIR; |
| 1555 | fullsiz = siz; |
| 1556 | ncookies = siz / 16; /* Guess at the number of cookies needed. */ |
| 1557 | if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred, nfsd->nd_slp, nam, &rdonly)) |
| 1558 | nfsm_reply(0); |
| 1559 | nqsrv_getl(vp, NQL_READ); |
| 1560 | if (error = nfsrv_access(vp, VEXEC, cred, rdonly, nfsd->nd_procp)) { |
| 1561 | vput(vp); |
| 1562 | nfsm_reply(0); |
| 1563 | } |
| 1564 | VOP_UNLOCK(vp); |
| 1565 | MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); |
| 1566 | MALLOC(cookiebuf, u_long *, ncookies * sizeof(*cookiebuf), M_TEMP, |
| 1567 | M_WAITOK); |
| 1568 | again: |
| 1569 | iv.iov_base = rbuf; |
| 1570 | iv.iov_len = fullsiz; |
| 1571 | io.uio_iov = &iv; |
| 1572 | io.uio_iovcnt = 1; |
| 1573 | io.uio_offset = (off_t)off; |
| 1574 | io.uio_resid = fullsiz; |
| 1575 | io.uio_segflg = UIO_SYSSPACE; |
| 1576 | io.uio_rw = UIO_READ; |
| 1577 | io.uio_procp = (struct proc *)0; |
| 1578 | error = VOP_READDIR(vp, &io, cred, &eofflag, cookiebuf, ncookies); |
| 1579 | cookie = cookiebuf; |
| 1580 | off = (u_long)io.uio_offset; |
| 1581 | if (error) { |
| 1582 | vrele(vp); |
| 1583 | free((caddr_t)cookiebuf, M_TEMP); |
| 1584 | free((caddr_t)rbuf, M_TEMP); |
| 1585 | nfsm_reply(0); |
| 1586 | } |
| 1587 | if (io.uio_resid) { |
| 1588 | siz -= io.uio_resid; |
| 1589 | |
| 1590 | /* |
| 1591 | * If nothing read, return eof |
| 1592 | * rpc reply |
| 1593 | */ |
| 1594 | if (siz == 0) { |
| 1595 | vrele(vp); |
| 1596 | nfsm_reply(2 * NFSX_UNSIGNED); |
| 1597 | nfsm_build(tl, u_long *, 2 * NFSX_UNSIGNED); |
| 1598 | *tl++ = nfs_false; |
| 1599 | *tl = nfs_true; |
| 1600 | FREE((caddr_t)cookiebuf, M_TEMP); |
| 1601 | FREE((caddr_t)rbuf, M_TEMP); |
| 1602 | return (0); |
| 1603 | } |
| 1604 | } |
| 1605 | |
| 1606 | /* |
| 1607 | * Check for degenerate cases of nothing useful read. |
| 1608 | * If so go try again |
| 1609 | */ |
| 1610 | cpos = rbuf; |
| 1611 | cend = rbuf + siz; |
| 1612 | while (cpos < cend) { |
| 1613 | dp = (struct dirent *)cpos; |
| 1614 | if (dp->d_fileno == 0) { |
| 1615 | cpos += dp->d_reclen; |
| 1616 | cookie++; |
| 1617 | } else |
| 1618 | break; |
| 1619 | } |
| 1620 | if (cpos >= cend) { |
| 1621 | siz = fullsiz; |
| 1622 | goto again; |
| 1623 | } |
| 1624 | |
| 1625 | len = 3 * NFSX_UNSIGNED; /* paranoia, probably can be 0 */ |
| 1626 | nfsm_reply(siz); |
| 1627 | mp = mp2 = mb; |
| 1628 | bp = bpos; |
| 1629 | be = bp + M_TRAILINGSPACE(mp); |
| 1630 | |
| 1631 | /* Loop through the records and build reply */ |
| 1632 | while (cpos < cend) { |
| 1633 | if (dp->d_fileno != 0) { |
| 1634 | nlen = dp->d_namlen; |
| 1635 | rem = nfsm_rndup(nlen)-nlen; |
| 1636 | |
| 1637 | /* |
| 1638 | * For readdir_and_lookup get the vnode using |
| 1639 | * the file number. |
| 1640 | */ |
| 1641 | if (VFS_VGET(vp->v_mount, dp->d_fileno, &nvp)) |
| 1642 | goto invalid; |
| 1643 | bzero((caddr_t)&fl.fl_nfh, sizeof (nfsv2fh_t)); |
| 1644 | fl.fl_nfh.fh_generic.fh_fsid = |
| 1645 | nvp->v_mount->mnt_stat.f_fsid; |
| 1646 | if (VFS_VPTOFH(nvp, &fl.fl_nfh.fh_generic.fh_fid)) { |
| 1647 | vput(nvp); |
| 1648 | goto invalid; |
| 1649 | } |
| 1650 | if (duration2) { |
| 1651 | (void) nqsrv_getlease(nvp, &duration2, NQL_READ, |
| 1652 | nfsd, nam, &cache2, &frev2, cred); |
| 1653 | fl.fl_duration = txdr_unsigned(duration2); |
| 1654 | fl.fl_cachable = txdr_unsigned(cache2); |
| 1655 | txdr_hyper(&frev2, fl.fl_frev); |
| 1656 | } else |
| 1657 | fl.fl_duration = 0; |
| 1658 | if (VOP_GETATTR(nvp, vap, cred, nfsd->nd_procp)) { |
| 1659 | vput(nvp); |
| 1660 | goto invalid; |
| 1661 | } |
| 1662 | vput(nvp); |
| 1663 | fp = (struct nfsv2_fattr *)&fl.fl_fattr; |
| 1664 | nfsm_srvfillattr; |
| 1665 | len += (4*NFSX_UNSIGNED + nlen + rem + NFSX_FH |
| 1666 | + NFSX_NQFATTR); |
| 1667 | if (len > cnt) { |
| 1668 | eofflag = 0; |
| 1669 | break; |
| 1670 | } |
| 1671 | /* |
| 1672 | * Build the directory record xdr from |
| 1673 | * the dirent entry. |
| 1674 | */ |
| 1675 | nfsm_clget; |
| 1676 | *tl = nfs_true; |
| 1677 | bp += NFSX_UNSIGNED; |
| 1678 | |
| 1679 | /* |
| 1680 | * For readdir_and_lookup copy the stuff out. |
| 1681 | */ |
| 1682 | xfer = sizeof (struct flrep); |
| 1683 | cp = (caddr_t)&fl; |
| 1684 | while (xfer > 0) { |
| 1685 | nfsm_clget; |
| 1686 | if ((bp+xfer) > be) |
| 1687 | tsiz = be-bp; |
| 1688 | else |
| 1689 | tsiz = xfer; |
| 1690 | bcopy(cp, bp, tsiz); |
| 1691 | bp += tsiz; |
| 1692 | xfer -= tsiz; |
| 1693 | if (xfer > 0) |
| 1694 | cp += tsiz; |
| 1695 | } |
| 1696 | nfsm_clget; |
| 1697 | *tl = txdr_unsigned(dp->d_fileno); |
| 1698 | bp += NFSX_UNSIGNED; |
| 1699 | nfsm_clget; |
| 1700 | *tl = txdr_unsigned(nlen); |
| 1701 | bp += NFSX_UNSIGNED; |
| 1702 | |
| 1703 | /* And loop around copying the name */ |
| 1704 | xfer = nlen; |
| 1705 | cp = dp->d_name; |
| 1706 | while (xfer > 0) { |
| 1707 | nfsm_clget; |
| 1708 | if ((bp+xfer) > be) |
| 1709 | tsiz = be-bp; |
| 1710 | else |
| 1711 | tsiz = xfer; |
| 1712 | bcopy(cp, bp, tsiz); |
| 1713 | bp += tsiz; |
| 1714 | xfer -= tsiz; |
| 1715 | if (xfer > 0) |
| 1716 | cp += tsiz; |
| 1717 | } |
| 1718 | /* And null pad to a long boundary */ |
| 1719 | for (i = 0; i < rem; i++) |
| 1720 | *bp++ = '\0'; |
| 1721 | nfsm_clget; |
| 1722 | |
| 1723 | /* Finish off the record */ |
| 1724 | *tl = txdr_unsigned(*cookie); |
| 1725 | bp += NFSX_UNSIGNED; |
| 1726 | } |
| 1727 | invalid: |
| 1728 | cpos += dp->d_reclen; |
| 1729 | dp = (struct dirent *)cpos; |
| 1730 | cookie++; |
| 1731 | } |
| 1732 | vrele(vp); |
| 1733 | nfsm_clget; |
| 1734 | *tl = nfs_false; |
| 1735 | bp += NFSX_UNSIGNED; |
| 1736 | nfsm_clget; |
| 1737 | if (eofflag) |
| 1738 | *tl = nfs_true; |
| 1739 | else |
| 1740 | *tl = nfs_false; |
| 1741 | bp += NFSX_UNSIGNED; |
| 1742 | if (mp != mb) { |
| 1743 | if (bp < be) |
| 1744 | mp->m_len = bp - mtod(mp, caddr_t); |
| 1745 | } else |
| 1746 | mp->m_len += bp - bpos; |
| 1747 | FREE(cookiebuf, M_TEMP); |
| 1748 | FREE(rbuf, M_TEMP); |
| 1749 | nfsm_srvdone; |
| 1750 | } |
| 1751 | |
| 1752 | /* |
| 1753 | * nfs statfs service |
| 1754 | */ |
| 1755 | nfsrv_statfs(nfsd, mrep, md, dpos, cred, nam, mrq) |
| 1756 | struct nfsd *nfsd; |
| 1757 | struct mbuf *mrep, *md; |
| 1758 | caddr_t dpos; |
| 1759 | struct ucred *cred; |
| 1760 | struct mbuf *nam, **mrq; |
| 1761 | { |
| 1762 | register struct statfs *sf; |
| 1763 | register struct nfsv2_statfs *sfp; |
| 1764 | register u_long *tl; |
| 1765 | register long t1; |
| 1766 | caddr_t bpos; |
| 1767 | int error = 0, rdonly, cache, isnq; |
| 1768 | char *cp2; |
| 1769 | struct mbuf *mb, *mb2, *mreq; |
| 1770 | struct vnode *vp; |
| 1771 | nfsv2fh_t nfh; |
| 1772 | fhandle_t *fhp; |
| 1773 | struct statfs statfs; |
| 1774 | u_quad_t frev; |
| 1775 | |
| 1776 | fhp = &nfh.fh_generic; |
| 1777 | isnq = (nfsd->nd_nqlflag != NQL_NOVAL); |
| 1778 | nfsm_srvmtofh(fhp); |
| 1779 | if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred, nfsd->nd_slp, nam, &rdonly)) |
| 1780 | nfsm_reply(0); |
| 1781 | sf = &statfs; |
| 1782 | error = VFS_STATFS(vp->v_mount, sf, nfsd->nd_procp); |
| 1783 | vput(vp); |
| 1784 | nfsm_reply(NFSX_STATFS(isnq)); |
| 1785 | nfsm_build(sfp, struct nfsv2_statfs *, NFSX_STATFS(isnq)); |
| 1786 | sfp->sf_tsize = txdr_unsigned(NFS_MAXDGRAMDATA); |
| 1787 | sfp->sf_bsize = txdr_unsigned(sf->f_bsize); |
| 1788 | sfp->sf_blocks = txdr_unsigned(sf->f_blocks); |
| 1789 | sfp->sf_bfree = txdr_unsigned(sf->f_bfree); |
| 1790 | sfp->sf_bavail = txdr_unsigned(sf->f_bavail); |
| 1791 | if (isnq) { |
| 1792 | sfp->sf_files = txdr_unsigned(sf->f_files); |
| 1793 | sfp->sf_ffree = txdr_unsigned(sf->f_ffree); |
| 1794 | } |
| 1795 | nfsm_srvdone; |
| 1796 | } |
| 1797 | |
| 1798 | /* |
| 1799 | * Null operation, used by clients to ping server |
| 1800 | */ |
| 1801 | /* ARGSUSED */ |
| 1802 | nfsrv_null(nfsd, mrep, md, dpos, cred, nam, mrq) |
| 1803 | struct nfsd *nfsd; |
| 1804 | struct mbuf *mrep, *md; |
| 1805 | caddr_t dpos; |
| 1806 | struct ucred *cred; |
| 1807 | struct mbuf *nam, **mrq; |
| 1808 | { |
| 1809 | caddr_t bpos; |
| 1810 | int error = VNOVAL, cache; |
| 1811 | struct mbuf *mb, *mreq; |
| 1812 | u_quad_t frev; |
| 1813 | |
| 1814 | nfsm_reply(0); |
| 1815 | return (error); |
| 1816 | } |
| 1817 | |
| 1818 | /* |
| 1819 | * No operation, used for obsolete procedures |
| 1820 | */ |
| 1821 | /* ARGSUSED */ |
| 1822 | nfsrv_noop(nfsd, mrep, md, dpos, cred, nam, mrq) |
| 1823 | struct nfsd *nfsd; |
| 1824 | struct mbuf *mrep, *md; |
| 1825 | caddr_t dpos; |
| 1826 | struct ucred *cred; |
| 1827 | struct mbuf *nam, **mrq; |
| 1828 | { |
| 1829 | caddr_t bpos; |
| 1830 | int error, cache; |
| 1831 | struct mbuf *mb, *mreq; |
| 1832 | u_quad_t frev; |
| 1833 | |
| 1834 | if (nfsd->nd_repstat) |
| 1835 | error = nfsd->nd_repstat; |
| 1836 | else |
| 1837 | error = EPROCUNAVAIL; |
| 1838 | nfsm_reply(0); |
| 1839 | return (error); |
| 1840 | } |
| 1841 | |
| 1842 | /* |
| 1843 | * Perform access checking for vnodes obtained from file handles that would |
| 1844 | * refer to files already opened by a Unix client. You cannot just use |
| 1845 | * vn_writechk() and VOP_ACCESS() for two reasons. |
| 1846 | * 1 - You must check for exported rdonly as well as MNT_RDONLY for the write case |
| 1847 | * 2 - The owner is to be given access irrespective of mode bits so that |
| 1848 | * processes that chmod after opening a file don't break. I don't like |
| 1849 | * this because it opens a security hole, but since the nfs server opens |
| 1850 | * a security hole the size of a barn door anyhow, what the heck. |
| 1851 | */ |
| 1852 | nfsrv_access(vp, flags, cred, rdonly, p) |
| 1853 | register struct vnode *vp; |
| 1854 | int flags; |
| 1855 | register struct ucred *cred; |
| 1856 | int rdonly; |
| 1857 | struct proc *p; |
| 1858 | { |
| 1859 | struct vattr vattr; |
| 1860 | int error; |
| 1861 | if (flags & VWRITE) { |
| 1862 | /* Just vn_writechk() changed to check rdonly */ |
| 1863 | /* |
| 1864 | * Disallow write attempts on read-only file systems; |
| 1865 | * unless the file is a socket or a block or character |
| 1866 | * device resident on the file system. |
| 1867 | */ |
| 1868 | if (rdonly || (vp->v_mount->mnt_flag & MNT_RDONLY)) { |
| 1869 | switch (vp->v_type) { |
| 1870 | case VREG: case VDIR: case VLNK: |
| 1871 | return (EROFS); |
| 1872 | } |
| 1873 | } |
| 1874 | /* |
| 1875 | * If there's shared text associated with |
| 1876 | * the inode, try to free it up once. If |
| 1877 | * we fail, we can't allow writing. |
| 1878 | */ |
| 1879 | if ((vp->v_flag & VTEXT) && !vnode_pager_uncache(vp)) |
| 1880 | return (ETXTBSY); |
| 1881 | } |
| 1882 | if (error = VOP_GETATTR(vp, &vattr, cred, p)) |
| 1883 | return (error); |
| 1884 | if ((error = VOP_ACCESS(vp, flags, cred, p)) && |
| 1885 | cred->cr_uid != vattr.va_uid) |
| 1886 | return (error); |
| 1887 | return (0); |
| 1888 | } |