2 * SPDX-License-Identifier: BSD-3-Clause
4 * Copyright (c) 1989, 1993
5 * The Regents of the University of California. All rights reserved.
7 * This code is derived from software contributed to Berkeley by
8 * Rick Macklem at The University of Guelph.
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 #include <sys/cdefs.h>
37 __FBSDID("$FreeBSD$");
40 * These functions support the macros and help fiddle mbuf chains for
41 * the nfs op functions. They do things like create the rpc header and
42 * copy data between mbuf chains and uio lists.
45 #include <fs/nfs/nfsport.h>
47 extern struct nfsstatsv1 nfsstatsv1;
48 extern int ncl_mbuf_mlen;
49 extern enum vtype newnv2tov_type[8];
50 extern enum vtype nv34tov_type[8];
52 #endif /* !APPLEKEXT */
54 static nfsuint64 nfs_nullcookie = {{ 0, 0 }};
57 * copies a uio scatter/gather list to an mbuf chain.
58 * NOTE: can ony handle iovcnt == 1
61 nfsm_uiombuf(struct nfsrv_descript *nd, struct uio *uiop, int siz)
64 struct mbuf *mp, *mp2;
66 int uiosiz, clflg, rem;
69 KASSERT(uiop->uio_iovcnt == 1, ("nfsm_uiotombuf: iovcnt != 1"));
71 if (siz > ncl_mbuf_mlen) /* or should it >= MCLBYTES ?? */
75 rem = NFSM_RNDUP(siz) - siz;
78 left = uiop->uio_iov->iov_len;
79 uiocp = uiop->uio_iov->iov_base;
84 mlen = M_TRAILINGSPACE(mp);
87 NFSMCLGET(mp, M_WAITOK);
91 mbuf_setnext(mp2, mp);
93 mlen = M_TRAILINGSPACE(mp);
95 xfer = (left > mlen) ? mlen : left;
98 if (uiop->uio_iov->iov_op != NULL)
99 (*(uiop->uio_iov->iov_op))
100 (uiocp, NFSMTOD(mp, caddr_t) + mbuf_len(mp),
104 if (uiop->uio_segflg == UIO_SYSSPACE)
105 NFSBCOPY(uiocp, NFSMTOD(mp, caddr_t) + mbuf_len(mp),
108 copyin(CAST_USER_ADDR_T(uiocp), NFSMTOD(mp, caddr_t)
109 + mbuf_len(mp), xfer);
110 mbuf_setlen(mp, mbuf_len(mp) + xfer);
113 uiop->uio_offset += xfer;
114 uiop->uio_resid -= xfer;
116 tcp = (char *)uiop->uio_iov->iov_base;
118 uiop->uio_iov->iov_base = (void *)tcp;
119 uiop->uio_iov->iov_len -= uiosiz;
123 if (rem > M_TRAILINGSPACE(mp)) {
126 mbuf_setnext(mp2, mp);
128 cp = NFSMTOD(mp, caddr_t) + mbuf_len(mp);
129 for (left = 0; left < rem; left++)
131 mbuf_setlen(mp, mbuf_len(mp) + rem);
134 nd->nd_bpos = NFSMTOD(mp, caddr_t) + mbuf_len(mp);
139 * copies a uio scatter/gather list to an mbuf chain.
140 * This version returns the mbuf list and does not use "nd".
141 * NOTE: can ony handle iovcnt == 1
144 nfsm_uiombuflist(struct uio *uiop, int siz, struct mbuf **mbp, char **cpp)
147 struct mbuf *mp, *mp2, *firstmp;
148 int xfer, left, mlen;
152 KASSERT(uiop->uio_iovcnt == 1, ("nfsm_uiotombuf: iovcnt != 1"));
154 if (siz > ncl_mbuf_mlen) /* or should it >= MCLBYTES ?? */
159 NFSMCLGET(mp, M_WAITOK);
165 left = uiop->uio_iov->iov_len;
166 uiocp = uiop->uio_iov->iov_base;
171 mlen = M_TRAILINGSPACE(mp);
174 NFSMCLGET(mp, M_WAITOK);
178 mbuf_setnext(mp2, mp);
180 mlen = M_TRAILINGSPACE(mp);
182 xfer = (left > mlen) ? mlen : left;
183 if (uiop->uio_segflg == UIO_SYSSPACE)
184 NFSBCOPY(uiocp, NFSMTOD(mp, caddr_t) +
187 copyin(uiocp, NFSMTOD(mp, caddr_t) +
189 mbuf_setlen(mp, mbuf_len(mp) + xfer);
192 uiop->uio_offset += xfer;
193 uiop->uio_resid -= xfer;
195 tcp = (char *)uiop->uio_iov->iov_base;
197 uiop->uio_iov->iov_base = (void *)tcp;
198 uiop->uio_iov->iov_len -= uiosiz;
202 *cpp = NFSMTOD(mp, caddr_t) + mbuf_len(mp);
209 * Load vnode attributes from the xdr file attributes.
210 * Returns EBADRPC if they can't be parsed, 0 otherwise.
213 nfsm_loadattr(struct nfsrv_descript *nd, struct nfsvattr *nap)
215 struct nfs_fattr *fp;
218 if (nd->nd_flag & ND_NFSV4) {
219 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, NULL,
220 NULL, NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL);
221 } else if (nd->nd_flag & ND_NFSV3) {
222 NFSM_DISSECT(fp, struct nfs_fattr *, NFSX_V3FATTR);
223 nap->na_type = nfsv34tov_type(fp->fa_type);
224 nap->na_mode = fxdr_unsigned(u_short, fp->fa_mode);
225 nap->na_rdev = NFSMAKEDEV(
226 fxdr_unsigned(int, fp->fa3_rdev.specdata1),
227 fxdr_unsigned(int, fp->fa3_rdev.specdata2));
228 nap->na_nlink = fxdr_unsigned(uint32_t, fp->fa_nlink);
229 nap->na_uid = fxdr_unsigned(uid_t, fp->fa_uid);
230 nap->na_gid = fxdr_unsigned(gid_t, fp->fa_gid);
231 nap->na_size = fxdr_hyper(&fp->fa3_size);
232 nap->na_blocksize = NFS_FABLKSIZE;
233 nap->na_bytes = fxdr_hyper(&fp->fa3_used);
234 nap->na_fileid = fxdr_hyper(&fp->fa3_fileid);
235 fxdr_nfsv3time(&fp->fa3_atime, &nap->na_atime);
236 fxdr_nfsv3time(&fp->fa3_ctime, &nap->na_ctime);
237 fxdr_nfsv3time(&fp->fa3_mtime, &nap->na_mtime);
241 NFSM_DISSECT(fp, struct nfs_fattr *, NFSX_V2FATTR);
242 nap->na_type = nfsv2tov_type(fp->fa_type);
243 nap->na_mode = fxdr_unsigned(u_short, fp->fa_mode);
244 if (nap->na_type == VNON || nap->na_type == VREG)
245 nap->na_type = IFTOVT(nap->na_mode);
246 nap->na_rdev = fxdr_unsigned(dev_t, fp->fa2_rdev);
249 * Really ugly NFSv2 kludge.
251 if (nap->na_type == VCHR && nap->na_rdev == ((dev_t)-1))
252 nap->na_type = VFIFO;
253 nap->na_nlink = fxdr_unsigned(u_short, fp->fa_nlink);
254 nap->na_uid = fxdr_unsigned(uid_t, fp->fa_uid);
255 nap->na_gid = fxdr_unsigned(gid_t, fp->fa_gid);
256 nap->na_size = fxdr_unsigned(u_int32_t, fp->fa2_size);
257 nap->na_blocksize = fxdr_unsigned(int32_t, fp->fa2_blocksize);
259 (u_quad_t)fxdr_unsigned(int32_t, fp->fa2_blocks) *
261 nap->na_fileid = fxdr_unsigned(uint64_t, fp->fa2_fileid);
262 fxdr_nfsv2time(&fp->fa2_atime, &nap->na_atime);
263 fxdr_nfsv2time(&fp->fa2_mtime, &nap->na_mtime);
265 nap->na_ctime.tv_sec = fxdr_unsigned(u_int32_t,
266 fp->fa2_ctime.nfsv2_sec);
267 nap->na_ctime.tv_nsec = 0;
268 nap->na_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec);
276 * This function finds the directory cookie that corresponds to the
277 * logical byte offset given.
279 APPLESTATIC nfsuint64 *
280 nfscl_getcookie(struct nfsnode *np, off_t off, int add)
282 struct nfsdmap *dp, *dp2;
285 pos = off / NFS_DIRBLKSIZ;
287 KASSERT(!add, ("nfs getcookie add at 0"));
288 return (&nfs_nullcookie);
291 dp = LIST_FIRST(&np->n_cookies);
294 dp = malloc(sizeof (struct nfsdmap),
295 M_NFSDIROFF, M_WAITOK);
296 dp->ndm_eocookie = 0;
297 LIST_INSERT_HEAD(&np->n_cookies, dp, ndm_list);
301 while (pos >= NFSNUMCOOKIES) {
302 pos -= NFSNUMCOOKIES;
303 if (LIST_NEXT(dp, ndm_list) != NULL) {
304 if (!add && dp->ndm_eocookie < NFSNUMCOOKIES &&
305 pos >= dp->ndm_eocookie)
307 dp = LIST_NEXT(dp, ndm_list);
309 dp2 = malloc(sizeof (struct nfsdmap),
310 M_NFSDIROFF, M_WAITOK);
311 dp2->ndm_eocookie = 0;
312 LIST_INSERT_AFTER(dp, dp2, ndm_list);
317 if (pos >= dp->ndm_eocookie) {
319 dp->ndm_eocookie = pos + 1;
323 return (&dp->ndm_cookies[pos]);
327 * Gets a file handle out of an nfs reply sent to the client and returns
328 * the file handle and the file's attributes.
329 * For V4, it assumes that Getfh and Getattr Op's results are here.
332 nfscl_mtofh(struct nfsrv_descript *nd, struct nfsfh **nfhpp,
333 struct nfsvattr *nap, int *attrflagp)
336 int error = 0, flag = 1;
341 * First get the file handle and vnode.
343 if (nd->nd_flag & ND_NFSV3) {
344 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
345 flag = fxdr_unsigned(int, *tl);
346 } else if (nd->nd_flag & ND_NFSV4) {
347 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
348 /* If the GetFH failed, clear flag. */
350 nd->nd_flag |= ND_NOMOREDATA;
352 error = ENXIO; /* Return ENXIO so *nfhpp isn't used. */
356 error = nfsm_getfh(nd, nfhpp);
362 * Now, get the attributes.
364 if (flag != 0 && (nd->nd_flag & ND_NFSV4) != 0) {
365 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
367 nd->nd_flag |= ND_NOMOREDATA;
370 } else if (nd->nd_flag & ND_NFSV3) {
371 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
373 flag = fxdr_unsigned(int, *tl);
374 } else if (fxdr_unsigned(int, *tl)) {
375 error = nfsm_advance(nd, NFSX_V3FATTR, -1);
381 error = nfsm_loadattr(nd, nap);
390 * Initialize the owner/delegation sleep lock.
393 nfscl_lockinit(struct nfsv4lock *lckp)
396 lckp->nfslock_usecnt = 0;
397 lckp->nfslock_lock = 0;
401 * Get an exclusive lock. (Not needed for OpenBSD4, since there is only one
402 * thread for each posix process in the kernel.)
405 nfscl_lockexcl(struct nfsv4lock *lckp, void *mutex)
410 igotlock = nfsv4_lock(lckp, 1, NULL, mutex, NULL);
415 * Release an exclusive lock.
418 nfscl_lockunlock(struct nfsv4lock *lckp)
421 nfsv4_unlock(lckp, 0);
425 * Called to derefernce a lock on a stateid (delegation or open owner).
428 nfscl_lockderef(struct nfsv4lock *lckp)
432 lckp->nfslock_usecnt--;
433 if (lckp->nfslock_usecnt == 0 && (lckp->nfslock_lock & NFSV4LOCK_WANTED)) {
434 lckp->nfslock_lock &= ~NFSV4LOCK_WANTED;
435 wakeup((caddr_t)lckp);