| 1 | /* |
| 2 | * Copyright (c) 1989 The Regents of the University of California. |
| 3 | * 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 7.41 (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 "param.h" |
| 32 | #include "proc.h" |
| 33 | #include "file.h" |
| 34 | #include "namei.h" |
| 35 | #include "vnode.h" |
| 36 | #include "mount.h" |
| 37 | #include "mbuf.h" |
| 38 | |
| 39 | #include "ufs/ufs/quota.h" |
| 40 | #include "ufs/ufs/inode.h" |
| 41 | #include "ufs/ufs/dir.h" |
| 42 | |
| 43 | #include "nfsv2.h" |
| 44 | #include "nfs.h" |
| 45 | #include "xdr_subs.h" |
| 46 | #include "nfsm_subs.h" |
| 47 | |
| 48 | /* Defs */ |
| 49 | #define TRUE 1 |
| 50 | #define FALSE 0 |
| 51 | |
| 52 | /* Global vars */ |
| 53 | extern u_long nfs_procids[NFS_NPROCS]; |
| 54 | extern u_long nfs_xdrneg1; |
| 55 | extern u_long nfs_false, nfs_true; |
| 56 | nfstype nfs_type[9]={ NFNON, NFREG, NFDIR, NFBLK, NFCHR, NFLNK, NFNON, |
| 57 | NFCHR, NFNON }; |
| 58 | |
| 59 | /* |
| 60 | * nfs getattr service |
| 61 | */ |
| 62 | nfsrv_getattr(mrep, md, dpos, cred, xid, mrq, repstat, p) |
| 63 | struct mbuf **mrq; |
| 64 | struct mbuf *mrep, *md; |
| 65 | caddr_t dpos; |
| 66 | struct ucred *cred; |
| 67 | u_long xid; |
| 68 | int *repstat; |
| 69 | struct proc *p; |
| 70 | { |
| 71 | register struct nfsv2_fattr *fp; |
| 72 | struct vattr va; |
| 73 | register struct vattr *vap = &va; |
| 74 | struct vnode *vp; |
| 75 | nfsv2fh_t nfh; |
| 76 | fhandle_t *fhp; |
| 77 | register u_long *tl; |
| 78 | register long t1; |
| 79 | caddr_t bpos; |
| 80 | int error = 0; |
| 81 | char *cp2; |
| 82 | struct mbuf *mb, *mb2, *mreq; |
| 83 | |
| 84 | fhp = &nfh.fh_generic; |
| 85 | nfsm_srvmtofh(fhp); |
| 86 | if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred)) |
| 87 | nfsm_reply(0); |
| 88 | error = VOP_GETATTR(vp, vap, cred, p); |
| 89 | vput(vp); |
| 90 | nfsm_reply(NFSX_FATTR); |
| 91 | nfsm_build(fp, struct nfsv2_fattr *, NFSX_FATTR); |
| 92 | nfsm_srvfillattr; |
| 93 | nfsm_srvdone; |
| 94 | } |
| 95 | |
| 96 | /* |
| 97 | * nfs setattr service |
| 98 | */ |
| 99 | nfsrv_setattr(mrep, md, dpos, cred, xid, mrq, repstat, p) |
| 100 | struct mbuf **mrq; |
| 101 | struct mbuf *mrep, *md; |
| 102 | caddr_t dpos; |
| 103 | struct ucred *cred; |
| 104 | u_long xid; |
| 105 | int *repstat; |
| 106 | struct proc *p; |
| 107 | { |
| 108 | struct vattr va; |
| 109 | register struct vattr *vap = &va; |
| 110 | register struct nfsv2_sattr *sp; |
| 111 | register struct nfsv2_fattr *fp; |
| 112 | struct vnode *vp; |
| 113 | nfsv2fh_t nfh; |
| 114 | fhandle_t *fhp; |
| 115 | register u_long *tl; |
| 116 | register long t1; |
| 117 | caddr_t bpos; |
| 118 | int error = 0; |
| 119 | char *cp2; |
| 120 | struct mbuf *mb, *mb2, *mreq; |
| 121 | |
| 122 | fhp = &nfh.fh_generic; |
| 123 | nfsm_srvmtofh(fhp); |
| 124 | nfsm_disect(sp, struct nfsv2_sattr *, NFSX_SATTR); |
| 125 | if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred)) |
| 126 | nfsm_reply(0); |
| 127 | if (error = nfsrv_access(vp, VWRITE, cred, p)) |
| 128 | goto out; |
| 129 | VATTR_NULL(vap); |
| 130 | /* |
| 131 | * Nah nah nah nah na nah |
| 132 | * There is a bug in the Sun client that puts 0xffff in the mode |
| 133 | * field of sattr when it should put in 0xffffffff. The u_short |
| 134 | * doesn't sign extend. |
| 135 | * --> check the low order 2 bytes for 0xffff |
| 136 | */ |
| 137 | if ((fxdr_unsigned(int, sp->sa_mode) & 0xffff) != 0xffff) |
| 138 | vap->va_mode = nfstov_mode(sp->sa_mode); |
| 139 | if (sp->sa_uid != nfs_xdrneg1) |
| 140 | vap->va_uid = fxdr_unsigned(uid_t, sp->sa_uid); |
| 141 | if (sp->sa_gid != nfs_xdrneg1) |
| 142 | vap->va_gid = fxdr_unsigned(gid_t, sp->sa_gid); |
| 143 | if (sp->sa_size != nfs_xdrneg1) |
| 144 | vap->va_size = fxdr_unsigned(u_long, sp->sa_size); |
| 145 | /* |
| 146 | * The usec field of sa_atime is overloaded with the va_flags field |
| 147 | * for 4.4BSD clients. Hopefully other clients always set both the |
| 148 | * sec and usec fields to -1 when not setting the atime. |
| 149 | */ |
| 150 | if (sp->sa_atime.tv_sec != nfs_xdrneg1) { |
| 151 | vap->va_atime.tv_sec = fxdr_unsigned(long, sp->sa_atime.tv_sec); |
| 152 | vap->va_atime.tv_usec = 0; |
| 153 | } |
| 154 | if (sp->sa_atime.tv_usec != nfs_xdrneg1) |
| 155 | vap->va_flags = fxdr_unsigned(u_long, sp->sa_atime.tv_usec); |
| 156 | if (sp->sa_mtime.tv_sec != nfs_xdrneg1) |
| 157 | fxdr_time(&sp->sa_mtime, &vap->va_mtime); |
| 158 | if (error = VOP_SETATTR(vp, vap, cred, p)) { |
| 159 | vput(vp); |
| 160 | nfsm_reply(0); |
| 161 | } |
| 162 | error = VOP_GETATTR(vp, vap, cred, p); |
| 163 | out: |
| 164 | vput(vp); |
| 165 | nfsm_reply(NFSX_FATTR); |
| 166 | nfsm_build(fp, struct nfsv2_fattr *, NFSX_FATTR); |
| 167 | nfsm_srvfillattr; |
| 168 | nfsm_srvdone; |
| 169 | } |
| 170 | |
| 171 | /* |
| 172 | * nfs lookup rpc |
| 173 | */ |
| 174 | nfsrv_lookup(mrep, md, dpos, cred, xid, mrq, repstat, p) |
| 175 | struct mbuf **mrq; |
| 176 | struct mbuf *mrep, *md; |
| 177 | caddr_t dpos; |
| 178 | struct ucred *cred; |
| 179 | u_long xid; |
| 180 | int *repstat; |
| 181 | struct proc *p; |
| 182 | { |
| 183 | register struct nfsv2_fattr *fp; |
| 184 | struct nameidata nd; |
| 185 | struct vnode *vp; |
| 186 | nfsv2fh_t nfh; |
| 187 | fhandle_t *fhp; |
| 188 | register caddr_t cp; |
| 189 | register u_long *tl; |
| 190 | register long t1; |
| 191 | caddr_t bpos; |
| 192 | int error = 0; |
| 193 | char *cp2; |
| 194 | struct mbuf *mb, *mb2, *mreq; |
| 195 | long len; |
| 196 | struct vattr va, *vap = &va; |
| 197 | |
| 198 | fhp = &nfh.fh_generic; |
| 199 | nfsm_srvmtofh(fhp); |
| 200 | nfsm_srvstrsiz(len, NFS_MAXNAMLEN); |
| 201 | nd.ni_cred = cred; |
| 202 | nd.ni_nameiop = LOOKUP | LOCKLEAF; |
| 203 | if (error = nfs_namei(&nd, fhp, len, &md, &dpos, p)) |
| 204 | nfsm_reply(0); |
| 205 | vp = nd.ni_vp; |
| 206 | bzero((caddr_t)fhp, sizeof(nfh)); |
| 207 | fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; |
| 208 | if (error = VFS_VPTOFH(vp, &fhp->fh_fid)) { |
| 209 | vput(vp); |
| 210 | nfsm_reply(0); |
| 211 | } |
| 212 | error = VOP_GETATTR(vp, vap, cred, p); |
| 213 | vput(vp); |
| 214 | nfsm_reply(NFSX_FH+NFSX_FATTR); |
| 215 | nfsm_srvfhtom(fhp); |
| 216 | nfsm_build(fp, struct nfsv2_fattr *, NFSX_FATTR); |
| 217 | nfsm_srvfillattr; |
| 218 | nfsm_srvdone; |
| 219 | } |
| 220 | |
| 221 | /* |
| 222 | * nfs readlink service |
| 223 | */ |
| 224 | nfsrv_readlink(mrep, md, dpos, cred, xid, mrq, repstat, p) |
| 225 | struct mbuf **mrq; |
| 226 | struct mbuf *mrep, *md; |
| 227 | caddr_t dpos; |
| 228 | struct ucred *cred; |
| 229 | u_long xid; |
| 230 | int *repstat; |
| 231 | struct proc *p; |
| 232 | { |
| 233 | struct iovec iv[(NFS_MAXPATHLEN+MLEN-1)/MLEN]; |
| 234 | register struct iovec *ivp = iv; |
| 235 | register struct mbuf *mp; |
| 236 | register u_long *tl; |
| 237 | register long t1; |
| 238 | caddr_t bpos; |
| 239 | int error = 0; |
| 240 | char *cp2; |
| 241 | struct mbuf *mb, *mb2, *mp2, *mp3, *mreq; |
| 242 | struct vnode *vp; |
| 243 | nfsv2fh_t nfh; |
| 244 | fhandle_t *fhp; |
| 245 | struct uio io, *uiop = &io; |
| 246 | int i, tlen, len; |
| 247 | |
| 248 | fhp = &nfh.fh_generic; |
| 249 | nfsm_srvmtofh(fhp); |
| 250 | len = 0; |
| 251 | i = 0; |
| 252 | while (len < NFS_MAXPATHLEN) { |
| 253 | MGET(mp, M_WAIT, MT_DATA); |
| 254 | MCLGET(mp, M_WAIT); |
| 255 | mp->m_len = NFSMSIZ(mp); |
| 256 | if (len == 0) |
| 257 | mp3 = mp2 = mp; |
| 258 | else { |
| 259 | mp2->m_next = mp; |
| 260 | mp2 = mp; |
| 261 | } |
| 262 | if ((len+mp->m_len) > NFS_MAXPATHLEN) { |
| 263 | mp->m_len = NFS_MAXPATHLEN-len; |
| 264 | len = NFS_MAXPATHLEN; |
| 265 | } else |
| 266 | len += mp->m_len; |
| 267 | ivp->iov_base = mtod(mp, caddr_t); |
| 268 | ivp->iov_len = mp->m_len; |
| 269 | i++; |
| 270 | ivp++; |
| 271 | } |
| 272 | uiop->uio_iov = iv; |
| 273 | uiop->uio_iovcnt = i; |
| 274 | uiop->uio_offset = 0; |
| 275 | uiop->uio_resid = len; |
| 276 | uiop->uio_rw = UIO_READ; |
| 277 | uiop->uio_segflg = UIO_SYSSPACE; |
| 278 | uiop->uio_procp = (struct proc *)0; |
| 279 | if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred)) { |
| 280 | m_freem(mp3); |
| 281 | nfsm_reply(0); |
| 282 | } |
| 283 | if (vp->v_type != VLNK) { |
| 284 | error = EINVAL; |
| 285 | goto out; |
| 286 | } |
| 287 | error = VOP_READLINK(vp, uiop, cred); |
| 288 | out: |
| 289 | vput(vp); |
| 290 | if (error) |
| 291 | m_freem(mp3); |
| 292 | nfsm_reply(NFSX_UNSIGNED); |
| 293 | if (uiop->uio_resid > 0) { |
| 294 | len -= uiop->uio_resid; |
| 295 | tlen = nfsm_rndup(len); |
| 296 | nfsm_adj(mp3, NFS_MAXPATHLEN-tlen, tlen-len); |
| 297 | } |
| 298 | nfsm_build(tl, u_long *, NFSX_UNSIGNED); |
| 299 | *tl = txdr_unsigned(len); |
| 300 | mb->m_next = mp3; |
| 301 | nfsm_srvdone; |
| 302 | } |
| 303 | |
| 304 | /* |
| 305 | * nfs read service |
| 306 | */ |
| 307 | nfsrv_read(mrep, md, dpos, cred, xid, mrq, repstat, p) |
| 308 | struct mbuf **mrq; |
| 309 | struct mbuf *mrep, *md; |
| 310 | caddr_t dpos; |
| 311 | struct ucred *cred; |
| 312 | u_long xid; |
| 313 | int *repstat; |
| 314 | struct proc *p; |
| 315 | { |
| 316 | register struct iovec *iv; |
| 317 | struct iovec *iv2; |
| 318 | register struct mbuf *m; |
| 319 | register struct nfsv2_fattr *fp; |
| 320 | register u_long *tl; |
| 321 | register long t1; |
| 322 | caddr_t bpos; |
| 323 | int error = 0; |
| 324 | char *cp2; |
| 325 | struct mbuf *mb, *mb2, *mreq; |
| 326 | struct mbuf *m2, *m3; |
| 327 | struct vnode *vp; |
| 328 | nfsv2fh_t nfh; |
| 329 | fhandle_t *fhp; |
| 330 | struct uio io, *uiop = &io; |
| 331 | struct vattr va, *vap = &va; |
| 332 | int i, cnt, len, left, siz, tlen; |
| 333 | off_t off; |
| 334 | |
| 335 | fhp = &nfh.fh_generic; |
| 336 | nfsm_srvmtofh(fhp); |
| 337 | nfsm_disect(tl, u_long *, NFSX_UNSIGNED); |
| 338 | off = fxdr_unsigned(off_t, *tl); |
| 339 | nfsm_srvstrsiz(cnt, NFS_MAXDATA); |
| 340 | if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred)) |
| 341 | nfsm_reply(0); |
| 342 | if (error = nfsrv_access(vp, VREAD | VEXEC, cred, p)) { |
| 343 | vput(vp); |
| 344 | nfsm_reply(0); |
| 345 | } |
| 346 | len = left = cnt; |
| 347 | /* |
| 348 | * Generate the mbuf list with the uio_iov ref. to it. |
| 349 | */ |
| 350 | i = 0; |
| 351 | m3 = (struct mbuf *)0; |
| 352 | #ifdef lint |
| 353 | m2 = (struct mbuf *)0; |
| 354 | #endif /* lint */ |
| 355 | MALLOC(iv, struct iovec *, |
| 356 | ((NFS_MAXDATA+MLEN-1)/MLEN) * sizeof (struct iovec), M_TEMP, |
| 357 | M_WAITOK); |
| 358 | iv2 = iv; |
| 359 | while (left > 0) { |
| 360 | MGET(m, M_WAIT, MT_DATA); |
| 361 | if (left > MINCLSIZE) |
| 362 | MCLGET(m, M_WAIT); |
| 363 | m->m_len = 0; |
| 364 | siz = min(M_TRAILINGSPACE(m), left); |
| 365 | m->m_len = siz; |
| 366 | iv->iov_base = mtod(m, caddr_t); |
| 367 | iv->iov_len = siz; |
| 368 | iv++; |
| 369 | i++; |
| 370 | left -= siz; |
| 371 | if (m3) { |
| 372 | m2->m_next = m; |
| 373 | m2 = m; |
| 374 | } else |
| 375 | m3 = m2 = m; |
| 376 | } |
| 377 | uiop->uio_iov = iv2; |
| 378 | uiop->uio_iovcnt = i; |
| 379 | uiop->uio_offset = off; |
| 380 | uiop->uio_resid = cnt; |
| 381 | uiop->uio_rw = UIO_READ; |
| 382 | uiop->uio_segflg = UIO_SYSSPACE; |
| 383 | uiop->uio_procp = (struct proc *)0; |
| 384 | error = VOP_READ(vp, uiop, IO_NODELOCKED, cred); |
| 385 | off = uiop->uio_offset; |
| 386 | FREE((caddr_t)iv2, M_TEMP); |
| 387 | if (error) { |
| 388 | m_freem(m3); |
| 389 | vput(vp); |
| 390 | nfsm_reply(0); |
| 391 | } |
| 392 | if (error = VOP_GETATTR(vp, vap, cred, p)) |
| 393 | m_freem(m3); |
| 394 | vput(vp); |
| 395 | nfsm_reply(NFSX_FATTR+NFSX_UNSIGNED); |
| 396 | nfsm_build(fp, struct nfsv2_fattr *, NFSX_FATTR); |
| 397 | nfsm_srvfillattr; |
| 398 | len -= uiop->uio_resid; |
| 399 | if (len > 0) { |
| 400 | tlen = nfsm_rndup(len); |
| 401 | if (cnt != tlen || tlen != len) |
| 402 | nfsm_adj(m3, cnt-tlen, tlen-len); |
| 403 | } else { |
| 404 | m_freem(m3); |
| 405 | m3 = (struct mbuf *)0; |
| 406 | } |
| 407 | nfsm_build(tl, u_long *, NFSX_UNSIGNED); |
| 408 | *tl = txdr_unsigned(len); |
| 409 | mb->m_next = m3; |
| 410 | nfsm_srvdone; |
| 411 | } |
| 412 | |
| 413 | /* |
| 414 | * nfs write service |
| 415 | */ |
| 416 | nfsrv_write(mrep, md, dpos, cred, xid, mrq, repstat, p) |
| 417 | struct mbuf *mrep, *md, **mrq; |
| 418 | caddr_t dpos; |
| 419 | struct ucred *cred; |
| 420 | u_long xid; |
| 421 | int *repstat; |
| 422 | struct proc *p; |
| 423 | { |
| 424 | register struct iovec *ivp; |
| 425 | register struct mbuf *mp; |
| 426 | register struct nfsv2_fattr *fp; |
| 427 | struct iovec iv[NFS_MAXIOVEC]; |
| 428 | struct vattr va; |
| 429 | register struct vattr *vap = &va; |
| 430 | register u_long *tl; |
| 431 | register long t1; |
| 432 | caddr_t bpos; |
| 433 | int error = 0; |
| 434 | char *cp2; |
| 435 | struct mbuf *mb, *mb2, *mreq; |
| 436 | struct vnode *vp; |
| 437 | nfsv2fh_t nfh; |
| 438 | fhandle_t *fhp; |
| 439 | struct uio io, *uiop = &io; |
| 440 | off_t off; |
| 441 | long siz, len, xfer; |
| 442 | |
| 443 | fhp = &nfh.fh_generic; |
| 444 | nfsm_srvmtofh(fhp); |
| 445 | nfsm_disect(tl, u_long *, 4*NFSX_UNSIGNED); |
| 446 | off = fxdr_unsigned(off_t, *++tl); |
| 447 | tl += 2; |
| 448 | len = fxdr_unsigned(long, *tl); |
| 449 | if (len > NFS_MAXDATA || len <= 0) { |
| 450 | error = EBADRPC; |
| 451 | nfsm_reply(0); |
| 452 | } |
| 453 | if (dpos == (mtod(md, caddr_t)+md->m_len)) { |
| 454 | mp = md->m_next; |
| 455 | if (mp == NULL) { |
| 456 | error = EBADRPC; |
| 457 | nfsm_reply(0); |
| 458 | } |
| 459 | } else { |
| 460 | mp = md; |
| 461 | siz = dpos-mtod(mp, caddr_t); |
| 462 | mp->m_len -= siz; |
| 463 | NFSMADV(mp, siz); |
| 464 | } |
| 465 | if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred)) |
| 466 | nfsm_reply(0); |
| 467 | if (error = nfsrv_access(vp, VWRITE, cred, p)) { |
| 468 | vput(vp); |
| 469 | nfsm_reply(0); |
| 470 | } |
| 471 | uiop->uio_resid = 0; |
| 472 | uiop->uio_rw = UIO_WRITE; |
| 473 | uiop->uio_segflg = UIO_SYSSPACE; |
| 474 | uiop->uio_procp = (struct proc *)0; |
| 475 | /* |
| 476 | * Do up to NFS_MAXIOVEC mbufs of write each iteration of the |
| 477 | * loop until done. |
| 478 | */ |
| 479 | while (len > 0 && uiop->uio_resid == 0) { |
| 480 | ivp = iv; |
| 481 | siz = 0; |
| 482 | uiop->uio_iov = ivp; |
| 483 | uiop->uio_iovcnt = 0; |
| 484 | uiop->uio_offset = off; |
| 485 | while (len > 0 && uiop->uio_iovcnt < NFS_MAXIOVEC && mp != NULL) { |
| 486 | ivp->iov_base = mtod(mp, caddr_t); |
| 487 | if (len < mp->m_len) |
| 488 | ivp->iov_len = xfer = len; |
| 489 | else |
| 490 | ivp->iov_len = xfer = mp->m_len; |
| 491 | #ifdef notdef |
| 492 | /* Not Yet .. */ |
| 493 | if (M_HASCL(mp) && (((u_long)ivp->iov_base) & CLOFSET) == 0) |
| 494 | ivp->iov_op = NULL; /* what should it be ?? */ |
| 495 | else |
| 496 | ivp->iov_op = NULL; |
| 497 | #endif |
| 498 | uiop->uio_iovcnt++; |
| 499 | ivp++; |
| 500 | len -= xfer; |
| 501 | siz += xfer; |
| 502 | mp = mp->m_next; |
| 503 | } |
| 504 | if (len > 0 && mp == NULL) { |
| 505 | error = EBADRPC; |
| 506 | vput(vp); |
| 507 | nfsm_reply(0); |
| 508 | } |
| 509 | uiop->uio_resid = siz; |
| 510 | if (error = VOP_WRITE(vp, uiop, IO_SYNC | IO_NODELOCKED, |
| 511 | cred)) { |
| 512 | vput(vp); |
| 513 | nfsm_reply(0); |
| 514 | } |
| 515 | off = uiop->uio_offset; |
| 516 | } |
| 517 | error = VOP_GETATTR(vp, vap, cred, p); |
| 518 | vput(vp); |
| 519 | nfsm_reply(NFSX_FATTR); |
| 520 | nfsm_build(fp, struct nfsv2_fattr *, NFSX_FATTR); |
| 521 | nfsm_srvfillattr; |
| 522 | nfsm_srvdone; |
| 523 | } |
| 524 | |
| 525 | /* |
| 526 | * nfs create service |
| 527 | * now does a truncate to 0 length via. setattr if it already exists |
| 528 | */ |
| 529 | nfsrv_create(mrep, md, dpos, cred, xid, mrq, repstat, p) |
| 530 | struct mbuf *mrep, *md, **mrq; |
| 531 | caddr_t dpos; |
| 532 | struct ucred *cred; |
| 533 | u_long xid; |
| 534 | int *repstat; |
| 535 | struct proc *p; |
| 536 | { |
| 537 | register struct nfsv2_fattr *fp; |
| 538 | struct vattr va; |
| 539 | register struct vattr *vap = &va; |
| 540 | struct nameidata nd; |
| 541 | register caddr_t cp; |
| 542 | register u_long *tl; |
| 543 | register long t1; |
| 544 | caddr_t bpos; |
| 545 | long rdev; |
| 546 | int error = 0; |
| 547 | char *cp2; |
| 548 | struct mbuf *mb, *mb2, *mreq; |
| 549 | struct vnode *vp; |
| 550 | nfsv2fh_t nfh; |
| 551 | fhandle_t *fhp; |
| 552 | long len; |
| 553 | |
| 554 | nd.ni_nameiop = 0; |
| 555 | fhp = &nfh.fh_generic; |
| 556 | nfsm_srvmtofh(fhp); |
| 557 | nfsm_srvstrsiz(len, NFS_MAXNAMLEN); |
| 558 | nd.ni_cred = cred; |
| 559 | nd.ni_nameiop = CREATE | LOCKPARENT | LOCKLEAF | SAVESTART; |
| 560 | if (error = nfs_namei(&nd, fhp, len, &md, &dpos, p)) |
| 561 | nfsm_reply(0); |
| 562 | VATTR_NULL(vap); |
| 563 | nfsm_disect(tl, u_long *, NFSX_SATTR); |
| 564 | /* |
| 565 | * Iff doesn't exist, create it |
| 566 | * otherwise just truncate to 0 length |
| 567 | * should I set the mode too ?? |
| 568 | */ |
| 569 | if (nd.ni_vp == NULL) { |
| 570 | vap->va_type = IFTOVT(fxdr_unsigned(u_long, *tl)); |
| 571 | if (vap->va_type == VNON) |
| 572 | vap->va_type = VREG; |
| 573 | vap->va_mode = nfstov_mode(*tl); |
| 574 | rdev = fxdr_unsigned(long, *(tl+3)); |
| 575 | if (vap->va_type == VREG || vap->va_type == VSOCK) { |
| 576 | p->p_spare[1]--; |
| 577 | vrele(nd.ni_startdir); |
| 578 | if (error = VOP_CREATE(&nd, vap, p)) |
| 579 | nfsm_reply(0); |
| 580 | FREE(nd.ni_pnbuf, M_NAMEI); |
| 581 | } else if (vap->va_type == VCHR || vap->va_type == VBLK || |
| 582 | vap->va_type == VFIFO) { |
| 583 | if (vap->va_type == VCHR && rdev == 0xffffffff) |
| 584 | vap->va_type = VFIFO; |
| 585 | if (vap->va_type == VFIFO) { |
| 586 | #ifndef FIFO |
| 587 | VOP_ABORTOP(&nd); |
| 588 | vput(nd.ni_dvp); |
| 589 | error = ENXIO; |
| 590 | goto out; |
| 591 | #endif /* FIFO */ |
| 592 | } else if (error = suser(cred, (short *)0)) { |
| 593 | VOP_ABORTOP(&nd); |
| 594 | vput(nd.ni_dvp); |
| 595 | goto out; |
| 596 | } else |
| 597 | vap->va_rdev = (dev_t)rdev; |
| 598 | if (error = VOP_MKNOD(&nd, vap, cred, p)) { |
| 599 | p->p_spare[1]--; |
| 600 | vrele(nd.ni_startdir); |
| 601 | nfsm_reply(0); |
| 602 | } |
| 603 | nd.ni_nameiop &= ~(OPMASK | LOCKPARENT | SAVESTART); |
| 604 | nd.ni_nameiop |= LOOKUP; |
| 605 | p->p_spare[1]--; |
| 606 | if (error = lookup(&nd, p)) { |
| 607 | free(nd.ni_pnbuf, M_NAMEI); |
| 608 | nfsm_reply(0); |
| 609 | } |
| 610 | FREE(nd.ni_pnbuf, M_NAMEI); |
| 611 | if (nd.ni_more) { |
| 612 | vrele(nd.ni_dvp); |
| 613 | vput(nd.ni_vp); |
| 614 | VOP_ABORTOP(&nd); |
| 615 | error = EINVAL; |
| 616 | nfsm_reply(0); |
| 617 | } |
| 618 | } else { |
| 619 | VOP_ABORTOP(&nd); |
| 620 | vput(nd.ni_dvp); |
| 621 | error = ENXIO; |
| 622 | goto out; |
| 623 | } |
| 624 | vp = nd.ni_vp; |
| 625 | } else { |
| 626 | p->p_spare[1]--; |
| 627 | vrele(nd.ni_startdir); |
| 628 | free(nd.ni_pnbuf, M_NAMEI); |
| 629 | vp = nd.ni_vp; |
| 630 | if (nd.ni_dvp == vp) |
| 631 | vrele(nd.ni_dvp); |
| 632 | else |
| 633 | vput(nd.ni_dvp); |
| 634 | VOP_ABORTOP(&nd); |
| 635 | vap->va_size = 0; |
| 636 | if (error = VOP_SETATTR(vp, vap, cred, p)) { |
| 637 | vput(vp); |
| 638 | nfsm_reply(0); |
| 639 | } |
| 640 | } |
| 641 | bzero((caddr_t)fhp, sizeof(nfh)); |
| 642 | fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; |
| 643 | if (error = VFS_VPTOFH(vp, &fhp->fh_fid)) { |
| 644 | vput(vp); |
| 645 | nfsm_reply(0); |
| 646 | } |
| 647 | error = VOP_GETATTR(vp, vap, cred, p); |
| 648 | vput(vp); |
| 649 | nfsm_reply(NFSX_FH+NFSX_FATTR); |
| 650 | nfsm_srvfhtom(fhp); |
| 651 | nfsm_build(fp, struct nfsv2_fattr *, NFSX_FATTR); |
| 652 | nfsm_srvfillattr; |
| 653 | return (error); |
| 654 | nfsmout: |
| 655 | if (nd.ni_nameiop) |
| 656 | p->p_spare[1]--, vrele(nd.ni_startdir); |
| 657 | VOP_ABORTOP(&nd); |
| 658 | if (nd.ni_dvp == nd.ni_vp) |
| 659 | vrele(nd.ni_dvp); |
| 660 | else |
| 661 | vput(nd.ni_dvp); |
| 662 | if (nd.ni_vp) |
| 663 | vput(nd.ni_vp); |
| 664 | return (error); |
| 665 | |
| 666 | out: |
| 667 | p->p_spare[1]--; |
| 668 | vrele(nd.ni_startdir); |
| 669 | free(nd.ni_pnbuf, M_NAMEI); |
| 670 | nfsm_reply(0); |
| 671 | } |
| 672 | |
| 673 | /* |
| 674 | * nfs remove service |
| 675 | */ |
| 676 | nfsrv_remove(mrep, md, dpos, cred, xid, mrq, repstat, p) |
| 677 | struct mbuf *mrep, *md, **mrq; |
| 678 | caddr_t dpos; |
| 679 | struct ucred *cred; |
| 680 | u_long xid; |
| 681 | int *repstat; |
| 682 | struct proc *p; |
| 683 | { |
| 684 | struct nameidata nd; |
| 685 | register u_long *tl; |
| 686 | register long t1; |
| 687 | caddr_t bpos; |
| 688 | int error = 0; |
| 689 | char *cp2; |
| 690 | struct mbuf *mb, *mreq; |
| 691 | struct vnode *vp; |
| 692 | nfsv2fh_t nfh; |
| 693 | fhandle_t *fhp; |
| 694 | long len; |
| 695 | |
| 696 | fhp = &nfh.fh_generic; |
| 697 | nfsm_srvmtofh(fhp); |
| 698 | nfsm_srvstrsiz(len, NFS_MAXNAMLEN); |
| 699 | nd.ni_cred = cred; |
| 700 | nd.ni_nameiop = DELETE | LOCKPARENT | LOCKLEAF; |
| 701 | if (error = nfs_namei(&nd, fhp, len, &md, &dpos, p)) |
| 702 | nfsm_reply(0); |
| 703 | vp = nd.ni_vp; |
| 704 | if (vp->v_type == VDIR && |
| 705 | (error = suser(cred, (short *)0))) |
| 706 | goto out; |
| 707 | /* |
| 708 | * The root of a mounted filesystem cannot be deleted. |
| 709 | */ |
| 710 | if (vp->v_flag & VROOT) { |
| 711 | error = EBUSY; |
| 712 | goto out; |
| 713 | } |
| 714 | if (vp->v_flag & VTEXT) |
| 715 | (void) vnode_pager_uncache(vp); |
| 716 | out: |
| 717 | if (!error) { |
| 718 | error = VOP_REMOVE(&nd, p); |
| 719 | } else { |
| 720 | VOP_ABORTOP(&nd); |
| 721 | if (nd.ni_dvp == vp) |
| 722 | vrele(nd.ni_dvp); |
| 723 | else |
| 724 | vput(nd.ni_dvp); |
| 725 | vput(vp); |
| 726 | } |
| 727 | nfsm_reply(0); |
| 728 | nfsm_srvdone; |
| 729 | } |
| 730 | |
| 731 | /* |
| 732 | * nfs rename service |
| 733 | */ |
| 734 | nfsrv_rename(mrep, md, dpos, cred, xid, mrq, repstat, p) |
| 735 | struct mbuf *mrep, *md, **mrq; |
| 736 | caddr_t dpos; |
| 737 | struct ucred *cred; |
| 738 | u_long xid; |
| 739 | int *repstat; |
| 740 | struct proc *p; |
| 741 | { |
| 742 | register u_long *tl; |
| 743 | register long t1; |
| 744 | caddr_t bpos; |
| 745 | int error = 0; |
| 746 | char *cp2; |
| 747 | struct mbuf *mb, *mreq; |
| 748 | struct nameidata fromnd, tond; |
| 749 | struct vnode *fvp, *tvp, *tdvp; |
| 750 | nfsv2fh_t fnfh, tnfh; |
| 751 | fhandle_t *ffhp, *tfhp; |
| 752 | long len, len2; |
| 753 | int rootflg = 0; |
| 754 | |
| 755 | ffhp = &fnfh.fh_generic; |
| 756 | tfhp = &tnfh.fh_generic; |
| 757 | fromnd.ni_nameiop = 0; |
| 758 | tond.ni_nameiop = 0; |
| 759 | nfsm_srvmtofh(ffhp); |
| 760 | nfsm_srvstrsiz(len, NFS_MAXNAMLEN); |
| 761 | /* |
| 762 | * Remember if we are root so that we can reset cr_uid before |
| 763 | * the second nfs_namei() call |
| 764 | */ |
| 765 | if (cred->cr_uid == 0) |
| 766 | rootflg++; |
| 767 | fromnd.ni_cred = cred; |
| 768 | fromnd.ni_nameiop = DELETE | WANTPARENT | SAVESTART; |
| 769 | if (error = nfs_namei(&fromnd, ffhp, len, &md, &dpos, p)) |
| 770 | nfsm_reply(0); |
| 771 | fvp = fromnd.ni_vp; |
| 772 | nfsm_srvmtofh(tfhp); |
| 773 | nfsm_strsiz(len2, NFS_MAXNAMLEN); |
| 774 | if (rootflg) |
| 775 | cred->cr_uid = 0; |
| 776 | tond.ni_cred = cred; |
| 777 | tond.ni_nameiop = RENAME | LOCKPARENT | LOCKLEAF | NOCACHE |
| 778 | | SAVESTART; |
| 779 | if (error = nfs_namei(&tond, tfhp, len2, &md, &dpos, p)) { |
| 780 | VOP_ABORTOP(&fromnd); |
| 781 | vrele(fromnd.ni_dvp); |
| 782 | vrele(fvp); |
| 783 | goto out1; |
| 784 | } |
| 785 | tdvp = tond.ni_dvp; |
| 786 | tvp = tond.ni_vp; |
| 787 | if (tvp != NULL) { |
| 788 | if (fvp->v_type == VDIR && tvp->v_type != VDIR) { |
| 789 | error = EISDIR; |
| 790 | goto out; |
| 791 | } else if (fvp->v_type != VDIR && tvp->v_type == VDIR) { |
| 792 | error = ENOTDIR; |
| 793 | goto out; |
| 794 | } |
| 795 | } |
| 796 | if (fvp->v_mount != tdvp->v_mount) { |
| 797 | error = EXDEV; |
| 798 | goto out; |
| 799 | } |
| 800 | if (fvp == tdvp) |
| 801 | error = EINVAL; |
| 802 | /* |
| 803 | * If source is the same as the destination (that is the |
| 804 | * same vnode with the same name in the same directory), |
| 805 | * then there is nothing to do. |
| 806 | */ |
| 807 | if (fvp == tvp && fromnd.ni_dvp == tdvp && |
| 808 | fromnd.ni_namelen == tond.ni_namelen && |
| 809 | !bcmp(fromnd.ni_ptr, tond.ni_ptr, fromnd.ni_namelen)) |
| 810 | error = -1; |
| 811 | out: |
| 812 | if (!error) { |
| 813 | error = VOP_RENAME(&fromnd, &tond, p); |
| 814 | } else { |
| 815 | VOP_ABORTOP(&tond); |
| 816 | if (tdvp == tvp) |
| 817 | vrele(tdvp); |
| 818 | else |
| 819 | vput(tdvp); |
| 820 | if (tvp) |
| 821 | vput(tvp); |
| 822 | VOP_ABORTOP(&fromnd); |
| 823 | vrele(fromnd.ni_dvp); |
| 824 | vrele(fvp); |
| 825 | } |
| 826 | p->p_spare[1]--; |
| 827 | vrele(tond.ni_startdir); |
| 828 | FREE(tond.ni_pnbuf, M_NAMEI); |
| 829 | out1: |
| 830 | p->p_spare[1]--; |
| 831 | vrele(fromnd.ni_startdir); |
| 832 | FREE(fromnd.ni_pnbuf, M_NAMEI); |
| 833 | nfsm_reply(0); |
| 834 | return (error); |
| 835 | |
| 836 | nfsmout: |
| 837 | if (tond.ni_nameiop) { |
| 838 | p->p_spare[1]--; |
| 839 | vrele(tond.ni_startdir); |
| 840 | FREE(tond.ni_pnbuf, M_NAMEI); |
| 841 | } |
| 842 | if (fromnd.ni_nameiop) { |
| 843 | p->p_spare[1]--; |
| 844 | vrele(fromnd.ni_startdir); |
| 845 | FREE(fromnd.ni_pnbuf, M_NAMEI); |
| 846 | VOP_ABORTOP(&fromnd); |
| 847 | vrele(fromnd.ni_dvp); |
| 848 | vrele(fvp); |
| 849 | } |
| 850 | return (error); |
| 851 | } |
| 852 | |
| 853 | /* |
| 854 | * nfs link service |
| 855 | */ |
| 856 | nfsrv_link(mrep, md, dpos, cred, xid, mrq, repstat, p) |
| 857 | struct mbuf *mrep, *md, **mrq; |
| 858 | caddr_t dpos; |
| 859 | struct ucred *cred; |
| 860 | u_long xid; |
| 861 | int *repstat; |
| 862 | struct proc *p; |
| 863 | { |
| 864 | struct nameidata nd; |
| 865 | register u_long *tl; |
| 866 | register long t1; |
| 867 | caddr_t bpos; |
| 868 | int error = 0; |
| 869 | char *cp2; |
| 870 | struct mbuf *mb, *mreq; |
| 871 | struct vnode *vp, *xp; |
| 872 | nfsv2fh_t nfh, dnfh; |
| 873 | fhandle_t *fhp, *dfhp; |
| 874 | long len; |
| 875 | |
| 876 | fhp = &nfh.fh_generic; |
| 877 | dfhp = &dnfh.fh_generic; |
| 878 | nfsm_srvmtofh(fhp); |
| 879 | nfsm_srvmtofh(dfhp); |
| 880 | nfsm_srvstrsiz(len, NFS_MAXNAMLEN); |
| 881 | if (error = nfsrv_fhtovp(fhp, FALSE, &vp, cred)) |
| 882 | nfsm_reply(0); |
| 883 | if (vp->v_type == VDIR && (error = suser(cred, NULL))) |
| 884 | goto out1; |
| 885 | nd.ni_cred = cred; |
| 886 | nd.ni_nameiop = CREATE | LOCKPARENT; |
| 887 | if (error = nfs_namei(&nd, dfhp, len, &md, &dpos, p)) |
| 888 | goto out1; |
| 889 | xp = nd.ni_vp; |
| 890 | if (xp != NULL) { |
| 891 | error = EEXIST; |
| 892 | goto out; |
| 893 | } |
| 894 | xp = nd.ni_dvp; |
| 895 | if (vp->v_mount != xp->v_mount) |
| 896 | error = EXDEV; |
| 897 | out: |
| 898 | if (!error) { |
| 899 | error = VOP_LINK(vp, &nd, p); |
| 900 | } else { |
| 901 | VOP_ABORTOP(&nd); |
| 902 | if (nd.ni_dvp == nd.ni_vp) |
| 903 | vrele(nd.ni_dvp); |
| 904 | else |
| 905 | vput(nd.ni_dvp); |
| 906 | if (nd.ni_vp) |
| 907 | vrele(nd.ni_vp); |
| 908 | } |
| 909 | out1: |
| 910 | vrele(vp); |
| 911 | nfsm_reply(0); |
| 912 | nfsm_srvdone; |
| 913 | } |
| 914 | |
| 915 | /* |
| 916 | * nfs symbolic link service |
| 917 | */ |
| 918 | nfsrv_symlink(mrep, md, dpos, cred, xid, mrq, repstat, p) |
| 919 | struct mbuf *mrep, *md, **mrq; |
| 920 | caddr_t dpos; |
| 921 | struct ucred *cred; |
| 922 | u_long xid; |
| 923 | int *repstat; |
| 924 | struct proc *p; |
| 925 | { |
| 926 | struct vattr va; |
| 927 | struct nameidata nd; |
| 928 | register struct vattr *vap = &va; |
| 929 | register u_long *tl; |
| 930 | register long t1; |
| 931 | struct nfsv2_sattr *sp; |
| 932 | caddr_t bpos; |
| 933 | struct uio io; |
| 934 | struct iovec iv; |
| 935 | int error = 0; |
| 936 | char *pathcp, *cp2; |
| 937 | struct mbuf *mb, *mreq; |
| 938 | nfsv2fh_t nfh; |
| 939 | fhandle_t *fhp; |
| 940 | long len, len2; |
| 941 | |
| 942 | pathcp = (char *)0; |
| 943 | fhp = &nfh.fh_generic; |
| 944 | nfsm_srvmtofh(fhp); |
| 945 | nfsm_srvstrsiz(len, NFS_MAXNAMLEN); |
| 946 | nd.ni_cred = cred; |
| 947 | nd.ni_nameiop = CREATE | LOCKPARENT; |
| 948 | if (error = nfs_namei(&nd, fhp, len, &md, &dpos, p)) |
| 949 | goto out; |
| 950 | nfsm_strsiz(len2, NFS_MAXPATHLEN); |
| 951 | MALLOC(pathcp, caddr_t, len2 + 1, M_TEMP, M_WAITOK); |
| 952 | iv.iov_base = pathcp; |
| 953 | iv.iov_len = len2; |
| 954 | io.uio_resid = len2; |
| 955 | io.uio_offset = 0; |
| 956 | io.uio_iov = &iv; |
| 957 | io.uio_iovcnt = 1; |
| 958 | io.uio_segflg = UIO_SYSSPACE; |
| 959 | io.uio_rw = UIO_READ; |
| 960 | io.uio_procp = (struct proc *)0; |
| 961 | nfsm_mtouio(&io, len2); |
| 962 | nfsm_disect(sp, struct nfsv2_sattr *, NFSX_SATTR); |
| 963 | *(pathcp + len2) = '\0'; |
| 964 | if (nd.ni_vp) { |
| 965 | VOP_ABORTOP(&nd); |
| 966 | if (nd.ni_dvp == nd.ni_vp) |
| 967 | vrele(nd.ni_dvp); |
| 968 | else |
| 969 | vput(nd.ni_dvp); |
| 970 | vrele(nd.ni_vp); |
| 971 | error = EEXIST; |
| 972 | goto out; |
| 973 | } |
| 974 | VATTR_NULL(vap); |
| 975 | vap->va_mode = fxdr_unsigned(u_short, sp->sa_mode); |
| 976 | error = VOP_SYMLINK(&nd, vap, pathcp, p); |
| 977 | out: |
| 978 | if (pathcp) |
| 979 | FREE(pathcp, M_TEMP); |
| 980 | nfsm_reply(0); |
| 981 | return (error); |
| 982 | nfsmout: |
| 983 | VOP_ABORTOP(&nd); |
| 984 | if (nd.ni_dvp == nd.ni_vp) |
| 985 | vrele(nd.ni_dvp); |
| 986 | else |
| 987 | vput(nd.ni_dvp); |
| 988 | if (nd.ni_vp) |
| 989 | vrele(nd.ni_vp); |
| 990 | if (pathcp) |
| 991 | FREE(pathcp, M_TEMP); |
| 992 | return (error); |
| 993 | } |
| 994 | |
| 995 | /* |
| 996 | * nfs mkdir service |
| 997 | */ |
| 998 | nfsrv_mkdir(mrep, md, dpos, cred, xid, mrq, repstat, p) |
| 999 | struct mbuf *mrep, *md, **mrq; |
| 1000 | caddr_t dpos; |
| 1001 | struct ucred *cred; |
| 1002 | u_long xid; |
| 1003 | int *repstat; |
| 1004 | struct proc *p; |
| 1005 | { |
| 1006 | struct vattr va; |
| 1007 | register struct vattr *vap = &va; |
| 1008 | register struct nfsv2_fattr *fp; |
| 1009 | struct nameidata nd; |
| 1010 | register caddr_t cp; |
| 1011 | register u_long *tl; |
| 1012 | register long t1; |
| 1013 | caddr_t bpos; |
| 1014 | int error = 0; |
| 1015 | char *cp2; |
| 1016 | struct mbuf *mb, *mb2, *mreq; |
| 1017 | struct vnode *vp; |
| 1018 | nfsv2fh_t nfh; |
| 1019 | fhandle_t *fhp; |
| 1020 | long len; |
| 1021 | |
| 1022 | fhp = &nfh.fh_generic; |
| 1023 | nfsm_srvmtofh(fhp); |
| 1024 | nfsm_srvstrsiz(len, NFS_MAXNAMLEN); |
| 1025 | nd.ni_cred = cred; |
| 1026 | nd.ni_nameiop = CREATE | LOCKPARENT; |
| 1027 | if (error = nfs_namei(&nd, fhp, len, &md, &dpos, p)) |
| 1028 | nfsm_reply(0); |
| 1029 | nfsm_disect(tl, u_long *, NFSX_UNSIGNED); |
| 1030 | VATTR_NULL(vap); |
| 1031 | vap->va_type = VDIR; |
| 1032 | vap->va_mode = nfstov_mode(*tl++); |
| 1033 | vp = nd.ni_vp; |
| 1034 | if (vp != NULL) { |
| 1035 | VOP_ABORTOP(&nd); |
| 1036 | if (nd.ni_dvp == vp) |
| 1037 | vrele(nd.ni_dvp); |
| 1038 | else |
| 1039 | vput(nd.ni_dvp); |
| 1040 | vrele(vp); |
| 1041 | error = EEXIST; |
| 1042 | nfsm_reply(0); |
| 1043 | } |
| 1044 | if (error = VOP_MKDIR(&nd, vap, p)) |
| 1045 | nfsm_reply(0); |
| 1046 | vp = nd.ni_vp; |
| 1047 | bzero((caddr_t)fhp, sizeof(nfh)); |
| 1048 | fhp->fh_fsid = vp->v_mount->mnt_stat.f_fsid; |
| 1049 | if (error = VFS_VPTOFH(vp, &fhp->fh_fid)) { |
| 1050 | vput(vp); |
| 1051 | nfsm_reply(0); |
| 1052 | } |
| 1053 | error = VOP_GETATTR(vp, vap, cred, p); |
| 1054 | vput(vp); |
| 1055 | nfsm_reply(NFSX_FH+NFSX_FATTR); |
| 1056 | nfsm_srvfhtom(fhp); |
| 1057 | nfsm_build(fp, struct nfsv2_fattr *, NFSX_FATTR); |
| 1058 | nfsm_srvfillattr; |
| 1059 | return (error); |
| 1060 | nfsmout: |
| 1061 | VOP_ABORTOP(&nd); |
| 1062 | if (nd.ni_dvp == nd.ni_vp) |
| 1063 | vrele(nd.ni_dvp); |
| 1064 | else |
| 1065 | vput(nd.ni_dvp); |
| 1066 | if (nd.ni_vp) |
| 1067 | vrele(nd.ni_vp); |
| 1068 | return (error); |
| 1069 | } |
| 1070 | |
| 1071 | /* |
| 1072 | * nfs rmdir service |
| 1073 | */ |
| 1074 | nfsrv_rmdir(mrep, md, dpos, cred, xid, mrq, repstat, p) |
| 1075 | struct mbuf *mrep, *md, **mrq; |
| 1076 | caddr_t dpos; |
| 1077 | struct ucred *cred; |
| 1078 | u_long xid; |
| 1079 | int *repstat; |
| 1080 | struct proc *p; |
| 1081 | { |
| 1082 | register u_long *tl; |
| 1083 | register long t1; |
| 1084 | caddr_t bpos; |
| 1085 | int error = 0; |
| 1086 | char *cp2; |
| 1087 | struct mbuf *mb, *mreq; |
| 1088 | struct vnode *vp; |
| 1089 | nfsv2fh_t nfh; |
| 1090 | fhandle_t *fhp; |
| 1091 | long len; |
| 1092 | struct nameidata nd; |
| 1093 | |
| 1094 | fhp = &nfh.fh_generic; |
| 1095 | nfsm_srvmtofh(fhp); |
| 1096 | nfsm_srvstrsiz(len, NFS_MAXNAMLEN); |
| 1097 | nd.ni_cred = cred; |
| 1098 | nd.ni_nameiop = DELETE | LOCKPARENT | LOCKLEAF; |
| 1099 | if (error = nfs_namei(&nd, fhp, len, &md, &dpos, p)) |
| 1100 | nfsm_reply(0); |
| 1101 | vp = nd.ni_vp; |
| 1102 | if (vp->v_type != VDIR) { |
| 1103 | error = ENOTDIR; |
| 1104 | goto out; |
| 1105 | } |
| 1106 | /* |
| 1107 | * No rmdir "." please. |
| 1108 | */ |
| 1109 | if (nd.ni_dvp == vp) { |
| 1110 | error = EINVAL; |
| 1111 | goto out; |
| 1112 | } |
| 1113 | /* |
| 1114 | * The root of a mounted filesystem cannot be deleted. |
| 1115 | */ |
| 1116 | if (vp->v_flag & VROOT) |
| 1117 | error = EBUSY; |
| 1118 | out: |
| 1119 | if (!error) { |
| 1120 | error = VOP_RMDIR(&nd, p); |
| 1121 | } else { |
| 1122 | VOP_ABORTOP(&nd); |
| 1123 | if (nd.ni_dvp == nd.ni_vp) |
| 1124 | vrele(nd.ni_dvp); |
| 1125 | else |
| 1126 | vput(nd.ni_dvp); |
| 1127 | vput(vp); |
| 1128 | } |
| 1129 | nfsm_reply(0); |
| 1130 | nfsm_srvdone; |
| 1131 | } |
| 1132 | |
| 1133 | /* |
| 1134 | * nfs readdir service |
| 1135 | * - mallocs what it thinks is enough to read |
| 1136 | * count rounded up to a multiple of NFS_DIRBLKSIZ <= NFS_MAXREADDIR |
| 1137 | * - calls VOP_READDIR() |
| 1138 | * - loops around building the reply |
| 1139 | * if the output generated exceeds count break out of loop |
| 1140 | * The nfsm_clget macro is used here so that the reply will be packed |
| 1141 | * tightly in mbuf clusters. |
| 1142 | * - it only knows that it has encountered eof when the VOP_READDIR() |
| 1143 | * reads nothing |
| 1144 | * - as such one readdir rpc will return eof false although you are there |
| 1145 | * and then the next will return eof |
| 1146 | * - it trims out records with d_ino == 0 |
| 1147 | * this doesn't matter for Unix clients, but they might confuse clients |
| 1148 | * for other os'. |
| 1149 | * NB: It is tempting to set eof to true if the VOP_READDIR() reads less |
| 1150 | * than requested, but this may not apply to all filesystems. For |
| 1151 | * example, client NFS does not { although it is never remote mounted |
| 1152 | * anyhow } |
| 1153 | * PS: The NFS protocol spec. does not clarify what the "count" byte |
| 1154 | * argument is a count of.. just name strings and file id's or the |
| 1155 | * entire reply rpc or ... |
| 1156 | * I tried just file name and id sizes and it confused the Sun client, |
| 1157 | * so I am using the full rpc size now. The "paranoia.." comment refers |
| 1158 | * to including the status longwords that are not a part of the dir. |
| 1159 | * "entry" structures, but are in the rpc. |
| 1160 | */ |
| 1161 | nfsrv_readdir(mrep, md, dpos, cred, xid, mrq, repstat, p) |
| 1162 | struct mbuf **mrq; |
| 1163 | struct mbuf *mrep, *md; |
| 1164 | caddr_t dpos; |
| 1165 | struct ucred *cred; |
| 1166 | u_long xid; |
| 1167 | int *repstat; |
| 1168 | struct proc *p; |
| 1169 | { |
| 1170 | register char *bp, *be; |
| 1171 | register struct mbuf *mp; |
| 1172 | register struct direct *dp; |
| 1173 | register caddr_t cp; |
| 1174 | register u_long *tl; |
| 1175 | register long t1; |
| 1176 | caddr_t bpos; |
| 1177 | int error = 0; |
| 1178 | char *cp2; |
| 1179 | struct mbuf *mb, *mb2, *mreq; |
| 1180 | char *cpos, *cend; |
| 1181 | int len, nlen, rem, xfer, tsiz, i; |
| 1182 | struct vnode *vp; |
| 1183 | struct mbuf *mp2, *mp3; |
| 1184 | nfsv2fh_t nfh; |
| 1185 | fhandle_t *fhp; |
| 1186 | struct uio io; |
| 1187 | struct iovec iv; |
| 1188 | int siz, cnt, fullsiz, eofflag; |
| 1189 | u_long on; |
| 1190 | char *rbuf; |
| 1191 | off_t off, toff; |
| 1192 | |
| 1193 | fhp = &nfh.fh_generic; |
| 1194 | nfsm_srvmtofh(fhp); |
| 1195 | nfsm_disect(tl, u_long *, 2*NFSX_UNSIGNED); |
| 1196 | toff = fxdr_unsigned(off_t, *tl++); |
| 1197 | off = (toff & ~(NFS_DIRBLKSIZ-1)); |
| 1198 | on = (toff & (NFS_DIRBLKSIZ-1)); |
| 1199 | cnt = fxdr_unsigned(int, *tl); |
| 1200 | siz = ((cnt+NFS_DIRBLKSIZ-1) & ~(NFS_DIRBLKSIZ-1)); |
| 1201 | if (cnt > NFS_MAXREADDIR) |
| 1202 | siz = NFS_MAXREADDIR; |
| 1203 | fullsiz = siz; |
| 1204 | if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred)) |
| 1205 | nfsm_reply(0); |
| 1206 | if (error = nfsrv_access(vp, VEXEC, cred, p)) { |
| 1207 | vput(vp); |
| 1208 | nfsm_reply(0); |
| 1209 | } |
| 1210 | VOP_UNLOCK(vp); |
| 1211 | MALLOC(rbuf, caddr_t, siz, M_TEMP, M_WAITOK); |
| 1212 | again: |
| 1213 | iv.iov_base = rbuf; |
| 1214 | iv.iov_len = fullsiz; |
| 1215 | io.uio_iov = &iv; |
| 1216 | io.uio_iovcnt = 1; |
| 1217 | io.uio_offset = off; |
| 1218 | io.uio_resid = fullsiz; |
| 1219 | io.uio_segflg = UIO_SYSSPACE; |
| 1220 | io.uio_rw = UIO_READ; |
| 1221 | io.uio_procp = (struct proc *)0; |
| 1222 | error = VOP_READDIR(vp, &io, cred, &eofflag); |
| 1223 | off = io.uio_offset; |
| 1224 | if (error) { |
| 1225 | vrele(vp); |
| 1226 | free((caddr_t)rbuf, M_TEMP); |
| 1227 | nfsm_reply(0); |
| 1228 | } |
| 1229 | if (io.uio_resid) { |
| 1230 | siz -= io.uio_resid; |
| 1231 | |
| 1232 | /* |
| 1233 | * If nothing read, return eof |
| 1234 | * rpc reply |
| 1235 | */ |
| 1236 | if (siz == 0) { |
| 1237 | vrele(vp); |
| 1238 | nfsm_reply(2*NFSX_UNSIGNED); |
| 1239 | nfsm_build(tl, u_long *, 2*NFSX_UNSIGNED); |
| 1240 | *tl++ = nfs_false; |
| 1241 | *tl = nfs_true; |
| 1242 | FREE((caddr_t)rbuf, M_TEMP); |
| 1243 | return (0); |
| 1244 | } |
| 1245 | } |
| 1246 | |
| 1247 | /* |
| 1248 | * Check for degenerate cases of nothing useful read. |
| 1249 | * If so go try again |
| 1250 | */ |
| 1251 | cpos = rbuf + on; |
| 1252 | cend = rbuf + siz; |
| 1253 | dp = (struct direct *)cpos; |
| 1254 | while (cpos < cend && dp->d_ino == 0) { |
| 1255 | cpos += dp->d_reclen; |
| 1256 | dp = (struct direct *)cpos; |
| 1257 | } |
| 1258 | if (cpos >= cend) { |
| 1259 | toff = off; |
| 1260 | siz = fullsiz; |
| 1261 | on = 0; |
| 1262 | goto again; |
| 1263 | } |
| 1264 | |
| 1265 | cpos = rbuf + on; |
| 1266 | cend = rbuf + siz; |
| 1267 | dp = (struct direct *)cpos; |
| 1268 | vrele(vp); |
| 1269 | len = 3*NFSX_UNSIGNED; /* paranoia, probably can be 0 */ |
| 1270 | bp = be = (caddr_t)0; |
| 1271 | mp3 = (struct mbuf *)0; |
| 1272 | nfsm_reply(siz); |
| 1273 | |
| 1274 | /* Loop through the records and build reply */ |
| 1275 | while (cpos < cend) { |
| 1276 | if (dp->d_ino != 0) { |
| 1277 | nlen = dp->d_namlen; |
| 1278 | rem = nfsm_rndup(nlen)-nlen; |
| 1279 | |
| 1280 | /* |
| 1281 | * As noted above, the NFS spec. is not clear about what |
| 1282 | * should be included in "count" as totalled up here in |
| 1283 | * "len". |
| 1284 | */ |
| 1285 | len += (4*NFSX_UNSIGNED+nlen+rem); |
| 1286 | if (len > cnt) { |
| 1287 | eofflag = 0; |
| 1288 | break; |
| 1289 | } |
| 1290 | |
| 1291 | /* Build the directory record xdr from the direct entry */ |
| 1292 | nfsm_clget; |
| 1293 | *tl = nfs_true; |
| 1294 | bp += NFSX_UNSIGNED; |
| 1295 | nfsm_clget; |
| 1296 | *tl = txdr_unsigned(dp->d_ino); |
| 1297 | bp += NFSX_UNSIGNED; |
| 1298 | nfsm_clget; |
| 1299 | *tl = txdr_unsigned(nlen); |
| 1300 | bp += NFSX_UNSIGNED; |
| 1301 | |
| 1302 | /* And loop arround copying the name */ |
| 1303 | xfer = nlen; |
| 1304 | cp = dp->d_name; |
| 1305 | while (xfer > 0) { |
| 1306 | nfsm_clget; |
| 1307 | if ((bp+xfer) > be) |
| 1308 | tsiz = be-bp; |
| 1309 | else |
| 1310 | tsiz = xfer; |
| 1311 | bcopy(cp, bp, tsiz); |
| 1312 | bp += tsiz; |
| 1313 | xfer -= tsiz; |
| 1314 | if (xfer > 0) |
| 1315 | cp += tsiz; |
| 1316 | } |
| 1317 | /* And null pad to a long boundary */ |
| 1318 | for (i = 0; i < rem; i++) |
| 1319 | *bp++ = '\0'; |
| 1320 | nfsm_clget; |
| 1321 | |
| 1322 | /* Finish off the record */ |
| 1323 | toff += dp->d_reclen; |
| 1324 | *tl = txdr_unsigned(toff); |
| 1325 | bp += NFSX_UNSIGNED; |
| 1326 | } else |
| 1327 | toff += dp->d_reclen; |
| 1328 | cpos += dp->d_reclen; |
| 1329 | dp = (struct direct *)cpos; |
| 1330 | } |
| 1331 | nfsm_clget; |
| 1332 | *tl = nfs_false; |
| 1333 | bp += NFSX_UNSIGNED; |
| 1334 | nfsm_clget; |
| 1335 | if (eofflag) |
| 1336 | *tl = nfs_true; |
| 1337 | else |
| 1338 | *tl = nfs_false; |
| 1339 | bp += NFSX_UNSIGNED; |
| 1340 | if (bp < be) |
| 1341 | mp->m_len = bp-mtod(mp, caddr_t); |
| 1342 | mb->m_next = mp3; |
| 1343 | FREE(rbuf, M_TEMP); |
| 1344 | nfsm_srvdone; |
| 1345 | } |
| 1346 | |
| 1347 | /* |
| 1348 | * nfs statfs service |
| 1349 | */ |
| 1350 | nfsrv_statfs(mrep, md, dpos, cred, xid, mrq, repstat, p) |
| 1351 | struct mbuf **mrq; |
| 1352 | struct mbuf *mrep, *md; |
| 1353 | caddr_t dpos; |
| 1354 | struct ucred *cred; |
| 1355 | u_long xid; |
| 1356 | int *repstat; |
| 1357 | struct proc *p; |
| 1358 | { |
| 1359 | register struct statfs *sf; |
| 1360 | register struct nfsv2_statfs *sfp; |
| 1361 | register u_long *tl; |
| 1362 | register long t1; |
| 1363 | caddr_t bpos; |
| 1364 | int error = 0; |
| 1365 | char *cp2; |
| 1366 | struct mbuf *mb, *mb2, *mreq; |
| 1367 | struct vnode *vp; |
| 1368 | nfsv2fh_t nfh; |
| 1369 | fhandle_t *fhp; |
| 1370 | struct statfs statfs; |
| 1371 | |
| 1372 | fhp = &nfh.fh_generic; |
| 1373 | nfsm_srvmtofh(fhp); |
| 1374 | if (error = nfsrv_fhtovp(fhp, TRUE, &vp, cred)) |
| 1375 | nfsm_reply(0); |
| 1376 | sf = &statfs; |
| 1377 | error = VFS_STATFS(vp->v_mount, sf, p); |
| 1378 | vput(vp); |
| 1379 | nfsm_reply(NFSX_STATFS); |
| 1380 | nfsm_build(sfp, struct nfsv2_statfs *, NFSX_STATFS); |
| 1381 | sfp->sf_tsize = txdr_unsigned(NFS_MAXDGRAMDATA); |
| 1382 | sfp->sf_bsize = txdr_unsigned(sf->f_fsize); |
| 1383 | sfp->sf_blocks = txdr_unsigned(sf->f_blocks); |
| 1384 | sfp->sf_bfree = txdr_unsigned(sf->f_bfree); |
| 1385 | sfp->sf_bavail = txdr_unsigned(sf->f_bavail); |
| 1386 | nfsm_srvdone; |
| 1387 | } |
| 1388 | |
| 1389 | /* |
| 1390 | * Null operation, used by clients to ping server |
| 1391 | */ |
| 1392 | /* ARGSUSED */ |
| 1393 | nfsrv_null(mrep, md, dpos, cred, xid, mrq, repstat, p) |
| 1394 | struct mbuf **mrq; |
| 1395 | struct mbuf *mrep, *md; |
| 1396 | caddr_t dpos; |
| 1397 | struct ucred *cred; |
| 1398 | u_long xid; |
| 1399 | int *repstat; |
| 1400 | struct proc *p; |
| 1401 | { |
| 1402 | caddr_t bpos; |
| 1403 | int error = 0; |
| 1404 | struct mbuf *mb, *mreq; |
| 1405 | |
| 1406 | error = VNOVAL; |
| 1407 | nfsm_reply(0); |
| 1408 | return (error); |
| 1409 | } |
| 1410 | |
| 1411 | /* |
| 1412 | * No operation, used for obsolete procedures |
| 1413 | */ |
| 1414 | /* ARGSUSED */ |
| 1415 | nfsrv_noop(mrep, md, dpos, cred, xid, mrq, repstat, p) |
| 1416 | struct mbuf **mrq; |
| 1417 | struct mbuf *mrep, *md; |
| 1418 | caddr_t dpos; |
| 1419 | struct ucred *cred; |
| 1420 | u_long xid; |
| 1421 | int *repstat; |
| 1422 | struct proc *p; |
| 1423 | { |
| 1424 | caddr_t bpos; |
| 1425 | int error = 0; |
| 1426 | struct mbuf *mb, *mreq; |
| 1427 | |
| 1428 | error = EPROCUNAVAIL; |
| 1429 | nfsm_reply(0); |
| 1430 | return (error); |
| 1431 | } |
| 1432 | |
| 1433 | /* |
| 1434 | * Perform access checking for vnodes obtained from file handles that would |
| 1435 | * refer to files already opened by a Unix client. You cannot just use |
| 1436 | * vn_writechk() and VOP_ACCESS() for two reasons. |
| 1437 | * 1 - You must check for MNT_EXRDONLY as well as MNT_RDONLY for the write case |
| 1438 | * 2 - The owner is to be given access irrespective of mode bits so that |
| 1439 | * processes that chmod after opening a file don't break. I don't like |
| 1440 | * this because it opens a security hole, but since the nfs server opens |
| 1441 | * a security hole the size of a barn door anyhow, what the heck. |
| 1442 | */ |
| 1443 | nfsrv_access(vp, flags, cred, p) |
| 1444 | register struct vnode *vp; |
| 1445 | int flags; |
| 1446 | register struct ucred *cred; |
| 1447 | struct proc *p; |
| 1448 | { |
| 1449 | struct vattr vattr; |
| 1450 | int error; |
| 1451 | if (flags & VWRITE) { |
| 1452 | /* Just vn_writechk() changed to check MNT_EXRDONLY */ |
| 1453 | /* |
| 1454 | * Disallow write attempts on read-only file systems; |
| 1455 | * unless the file is a socket or a block or character |
| 1456 | * device resident on the file system. |
| 1457 | */ |
| 1458 | if (vp->v_mount->mnt_flag & (MNT_RDONLY | MNT_EXRDONLY)) { |
| 1459 | switch (vp->v_type) { |
| 1460 | case VREG: case VDIR: case VLNK: |
| 1461 | return (EROFS); |
| 1462 | } |
| 1463 | } |
| 1464 | /* |
| 1465 | * If there's shared text associated with |
| 1466 | * the inode, try to free it up once. If |
| 1467 | * we fail, we can't allow writing. |
| 1468 | */ |
| 1469 | if ((vp->v_flag & VTEXT) && !vnode_pager_uncache(vp)) |
| 1470 | return (ETXTBSY); |
| 1471 | } |
| 1472 | if (error = VOP_GETATTR(vp, &vattr, cred, p)) |
| 1473 | return (error); |
| 1474 | if ((error = VOP_ACCESS(vp, flags, cred, p)) && |
| 1475 | cred->cr_uid != vattr.va_uid) |
| 1476 | return (error); |
| 1477 | return (0); |
| 1478 | } |