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.
44 #include <fs/nfs/nfsport.h>
46 extern struct nfsstatsv1 nfsstatsv1;
47 extern int ncl_mbuf_mlen;
48 extern enum vtype newnv2tov_type[8];
49 extern enum vtype nv34tov_type[8];
53 * copies a uio scatter/gather list to an mbuf chain.
54 * NOTE: can only handle iovcnt == 1
57 nfsm_uiombuf(struct nfsrv_descript *nd, struct uio *uiop, int siz)
60 struct mbuf *mp, *mp2;
62 int uiosiz, clflg, rem;
65 KASSERT(uiop->uio_iovcnt == 1, ("nfsm_uiotombuf: iovcnt != 1"));
67 if (siz > ncl_mbuf_mlen) /* or should it >= MCLBYTES ?? */
71 rem = NFSM_RNDUP(siz) - siz;
75 KASSERT((nd->nd_flag & ND_EXTPG) != 0 || mcp ==
76 mtod(mp, char *) + mp->m_len, ("nfsm_uiombuf: mcp wrong"));
77 left = uiop->uio_iov->iov_len;
78 uiocp = uiop->uio_iov->iov_base;
83 if ((nd->nd_flag & ND_EXTPG) != 0)
84 mlen = nd->nd_bextpgsiz;
86 mlen = M_TRAILINGSPACE(mp);
88 if ((nd->nd_flag & ND_EXTPG) != 0) {
89 mp = nfsm_add_ext_pgs(mp,
90 nd->nd_maxextsiz, &nd->nd_bextpg);
91 mcp = (char *)(void *)PHYS_TO_DMAP(
92 mp->m_epg_pa[nd->nd_bextpg]);
93 nd->nd_bextpgsiz = mlen = PAGE_SIZE;
96 NFSMCLGET(mp, M_WAITOK);
100 mlen = M_TRAILINGSPACE(mp);
101 mcp = mtod(mp, char *);
106 xfer = (left > mlen) ? mlen : left;
107 if (uiop->uio_segflg == UIO_SYSSPACE)
108 NFSBCOPY(uiocp, mcp, xfer);
110 copyin(uiocp, mcp, xfer);
115 if ((nd->nd_flag & ND_EXTPG) != 0) {
116 nd->nd_bextpgsiz -= xfer;
117 mp->m_epg_last_len += xfer;
119 uiop->uio_offset += xfer;
120 uiop->uio_resid -= xfer;
122 tcp = (char *)uiop->uio_iov->iov_base;
124 uiop->uio_iov->iov_base = (void *)tcp;
125 uiop->uio_iov->iov_len -= uiosiz;
129 if ((nd->nd_flag & ND_EXTPG) == 0 && rem >
130 M_TRAILINGSPACE(mp)) {
134 mcp = mtod(mp, char *);
135 } else if ((nd->nd_flag & ND_EXTPG) != 0 && rem >
137 mp = nfsm_add_ext_pgs(mp, nd->nd_maxextsiz,
139 mcp = (char *)(void *)
140 PHYS_TO_DMAP(mp->m_epg_pa[nd->nd_bextpg]);
141 nd->nd_bextpgsiz = PAGE_SIZE;
143 for (left = 0; left < rem; left++)
146 if ((nd->nd_flag & ND_EXTPG) != 0) {
147 nd->nd_bextpgsiz -= rem;
148 mp->m_epg_last_len += rem;
156 * copies a uio scatter/gather list to an mbuf chain.
157 * This version returns the mbuf list and does not use "nd".
158 * NOTE: can only handle iovcnt == 1
161 nfsm_uiombuflist(struct uio *uiop, int siz, u_int maxext)
164 struct mbuf *mp, *mp2, *firstmp;
165 int extpg, extpgsiz = 0, i, left, mlen, rem, xfer;
169 KASSERT(uiop->uio_iovcnt == 1, ("nfsm_uiotombuf: iovcnt != 1"));
172 mp = mb_alloc_ext_plus_pages(PAGE_SIZE, M_WAITOK);
173 mcp = (char *)(void *)PHYS_TO_DMAP(mp->m_epg_pa[0]);
175 extpgsiz = PAGE_SIZE;
177 if (siz > ncl_mbuf_mlen) /* or should it >= MCLBYTES ?? */
182 NFSMCLGET(mp, M_WAITOK);
185 mcp = mtod(mp, char *);
189 rem = NFSM_RNDUP(siz) - siz;
191 left = uiop->uio_iov->iov_len;
192 uiocp = uiop->uio_iov->iov_base;
200 mlen = M_TRAILINGSPACE(mp);
203 mp = nfsm_add_ext_pgs(mp, maxext,
205 mlen = extpgsiz = PAGE_SIZE;
206 mcp = (char *)(void *)PHYS_TO_DMAP(
207 mp->m_epg_pa[extpg]);
210 NFSMCLGET(mp, M_WAITOK);
213 mcp = mtod(mp, char *);
214 mlen = M_TRAILINGSPACE(mp);
220 xfer = (left > mlen) ? mlen : left;
221 if (uiop->uio_segflg == UIO_SYSSPACE)
222 NFSBCOPY(uiocp, mcp, xfer);
224 copyin(uiocp, mcp, xfer);
229 mp->m_epg_last_len += xfer;
233 uiop->uio_offset += xfer;
234 uiop->uio_resid -= xfer;
236 tcp = (char *)uiop->uio_iov->iov_base;
238 uiop->uio_iov->iov_base = (void *)tcp;
239 uiop->uio_iov->iov_len -= uiosiz;
243 KASSERT((mp->m_flags & M_EXTPG) != 0 ||
244 rem <= M_TRAILINGSPACE(mp),
245 ("nfsm_uiombuflist: no space for padding"));
246 for (i = 0; i < rem; i++)
250 mp->m_epg_last_len += rem;
256 * Load vnode attributes from the xdr file attributes.
257 * Returns EBADRPC if they can't be parsed, 0 otherwise.
260 nfsm_loadattr(struct nfsrv_descript *nd, struct nfsvattr *nap)
262 struct nfs_fattr *fp;
265 if (nd->nd_flag & ND_NFSV4) {
266 error = nfsv4_loadattr(nd, NULL, nap, NULL, NULL, 0, NULL,
267 NULL, NULL, NULL, NULL, 0, NULL, NULL, NULL, NULL, NULL);
268 } else if (nd->nd_flag & ND_NFSV3) {
269 NFSM_DISSECT(fp, struct nfs_fattr *, NFSX_V3FATTR);
270 nap->na_type = nfsv34tov_type(fp->fa_type);
271 nap->na_mode = fxdr_unsigned(u_short, fp->fa_mode);
272 nap->na_rdev = NFSMAKEDEV(
273 fxdr_unsigned(int, fp->fa3_rdev.specdata1),
274 fxdr_unsigned(int, fp->fa3_rdev.specdata2));
275 nap->na_nlink = fxdr_unsigned(uint32_t, fp->fa_nlink);
276 nap->na_uid = fxdr_unsigned(uid_t, fp->fa_uid);
277 nap->na_gid = fxdr_unsigned(gid_t, fp->fa_gid);
278 nap->na_size = fxdr_hyper(&fp->fa3_size);
279 nap->na_blocksize = NFS_FABLKSIZE;
280 nap->na_bytes = fxdr_hyper(&fp->fa3_used);
281 nap->na_fileid = fxdr_hyper(&fp->fa3_fileid);
282 fxdr_nfsv3time(&fp->fa3_atime, &nap->na_atime);
283 fxdr_nfsv3time(&fp->fa3_ctime, &nap->na_ctime);
284 fxdr_nfsv3time(&fp->fa3_mtime, &nap->na_mtime);
285 nap->na_btime.tv_sec = -1;
286 nap->na_btime.tv_nsec = 0;
291 NFSM_DISSECT(fp, struct nfs_fattr *, NFSX_V2FATTR);
292 nap->na_type = nfsv2tov_type(fp->fa_type);
293 nap->na_mode = fxdr_unsigned(u_short, fp->fa_mode);
294 if (nap->na_type == VNON || nap->na_type == VREG)
295 nap->na_type = IFTOVT(nap->na_mode);
296 nap->na_rdev = fxdr_unsigned(dev_t, fp->fa2_rdev);
299 * Really ugly NFSv2 kludge.
301 if (nap->na_type == VCHR && nap->na_rdev == ((dev_t)-1))
302 nap->na_type = VFIFO;
303 nap->na_nlink = fxdr_unsigned(u_short, fp->fa_nlink);
304 nap->na_uid = fxdr_unsigned(uid_t, fp->fa_uid);
305 nap->na_gid = fxdr_unsigned(gid_t, fp->fa_gid);
306 nap->na_size = fxdr_unsigned(u_int32_t, fp->fa2_size);
307 nap->na_blocksize = fxdr_unsigned(int32_t, fp->fa2_blocksize);
309 (u_quad_t)fxdr_unsigned(int32_t, fp->fa2_blocks) *
311 nap->na_fileid = fxdr_unsigned(uint64_t, fp->fa2_fileid);
312 fxdr_nfsv2time(&fp->fa2_atime, &nap->na_atime);
313 fxdr_nfsv2time(&fp->fa2_mtime, &nap->na_mtime);
315 nap->na_ctime.tv_sec = fxdr_unsigned(u_int32_t,
316 fp->fa2_ctime.nfsv2_sec);
317 nap->na_ctime.tv_nsec = 0;
318 nap->na_btime.tv_sec = -1;
319 nap->na_btime.tv_nsec = 0;
320 nap->na_gen = fxdr_unsigned(u_int32_t,fp->fa2_ctime.nfsv2_usec);
328 * Gets a file handle out of an nfs reply sent to the client and returns
329 * the file handle and the file's attributes.
330 * For V4, it assumes that Getfh and Getattr Op's results are here.
333 nfscl_mtofh(struct nfsrv_descript *nd, struct nfsfh **nfhpp,
334 struct nfsvattr *nap, int *attrflagp)
337 int error = 0, flag = 1;
342 * First get the file handle and vnode.
344 if (nd->nd_flag & ND_NFSV3) {
345 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
346 flag = fxdr_unsigned(int, *tl);
347 } else if (nd->nd_flag & ND_NFSV4) {
348 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
349 /* If the GetFH failed, clear flag. */
351 nd->nd_flag |= ND_NOMOREDATA;
353 error = ENXIO; /* Return ENXIO so *nfhpp isn't used. */
357 error = nfsm_getfh(nd, nfhpp);
363 * Now, get the attributes.
365 if (flag != 0 && (nd->nd_flag & ND_NFSV4) != 0) {
366 NFSM_DISSECT(tl, u_int32_t *, 2 * NFSX_UNSIGNED);
368 nd->nd_flag |= ND_NOMOREDATA;
371 } else if (nd->nd_flag & ND_NFSV3) {
372 NFSM_DISSECT(tl, u_int32_t *, NFSX_UNSIGNED);
374 flag = fxdr_unsigned(int, *tl);
375 } else if (fxdr_unsigned(int, *tl)) {
376 error = nfsm_advance(nd, NFSX_V3FATTR, -1);
382 error = nfsm_loadattr(nd, nap);
391 * Initialize the owner/delegation sleep lock.
394 nfscl_lockinit(struct nfsv4lock *lckp)
397 lckp->nfslock_usecnt = 0;
398 lckp->nfslock_lock = 0;
402 * Get an exclusive lock. (Not needed for OpenBSD4, since there is only one
403 * thread for each posix process in the kernel.)
406 nfscl_lockexcl(struct nfsv4lock *lckp, void *mutex)
411 igotlock = nfsv4_lock(lckp, 1, NULL, mutex, NULL);
416 * Release an exclusive lock.
419 nfscl_lockunlock(struct nfsv4lock *lckp)
422 nfsv4_unlock(lckp, 0);
426 * Called to dereference a lock on a stateid (delegation or open owner).
429 nfscl_lockderef(struct nfsv4lock *lckp)
433 lckp->nfslock_usecnt--;
434 if (lckp->nfslock_usecnt == 0 && (lckp->nfslock_lock & NFSV4LOCK_WANTED)) {
435 lckp->nfslock_lock &= ~NFSV4LOCK_WANTED;
436 wakeup((caddr_t)lckp);