37
38/*
39 * These functions support the macros and help fiddle mbuf chains for
40 * the nfs op functions. They do things like create the rpc header and
41 * copy data between mbuf chains and uio lists.
42 */
43
44#include <sys/param.h>
45#include <sys/systm.h>
46#include <sys/kernel.h>
47#include <sys/bio.h>
48#include <sys/buf.h>
49#include <sys/proc.h>
50#include <sys/mount.h>
51#include <sys/vnode.h>
52#include <sys/namei.h>
53#include <sys/mbuf.h>
54#include <sys/socket.h>
55#include <sys/stat.h>
56#include <sys/malloc.h>
57#include <sys/sysent.h>
58#include <sys/syscall.h>
59#include <sys/sysproto.h>
60
61#include <vm/vm.h>
62#include <vm/vm_object.h>
63#include <vm/vm_extern.h>
64#include <vm/uma.h>
65
66#include <rpc/rpcclnt.h>
67
68#include <nfs/rpcv2.h>
69#include <nfs/nfsproto.h>
70#include <nfsclient/nfs.h>
71#include <nfsclient/nfsnode.h>
72#include <nfs/xdr_subs.h>
73#include <nfsclient/nfsm_subs.h>
74#include <nfsclient/nfsmount.h>
75
76#include <netinet/in.h>
77
78/*
79 * Note that stdarg.h and the ANSI style va_start macro is used for both
80 * ANSI and traditional C compilers.
81 */
82#include <machine/stdarg.h>
83
84/*
85 * Data items converted to xdr at startup, since they are constant
86 * This is kinda hokey, but may save a little time doing byte swaps
87 */
88u_int32_t nfs_xdrneg1;
89u_int32_t rpc_call, rpc_vers, rpc_reply, rpc_msgdenied, rpc_autherr,
90 rpc_mismatch, rpc_auth_unix, rpc_msgaccepted;
91u_int32_t nfs_true, nfs_false;
92
93/* And other global data */
94static u_int32_t nfs_xid = 0;
95static enum vtype nv2tov_type[8]= {
96 VNON, VREG, VDIR, VBLK, VCHR, VLNK, VNON, VNON
97};
98
99int nfs_ticks;
100int nfs_pbuf_freecnt = -1; /* start out unlimited */
101
102struct nfs_reqq nfs_reqq;
103struct mtx nfs_reqq_mtx;
104struct nfs_bufq nfs_bufq;
105static struct mtx nfs_xid_mtx;
106
107/*
108 * and the reverse mapping from generic to Version 2 procedure numbers
109 */
110int nfsv2_procid[NFS_NPROCS] = {
111 NFSV2PROC_NULL,
112 NFSV2PROC_GETATTR,
113 NFSV2PROC_SETATTR,
114 NFSV2PROC_LOOKUP,
115 NFSV2PROC_NOOP,
116 NFSV2PROC_READLINK,
117 NFSV2PROC_READ,
118 NFSV2PROC_WRITE,
119 NFSV2PROC_CREATE,
120 NFSV2PROC_MKDIR,
121 NFSV2PROC_SYMLINK,
122 NFSV2PROC_CREATE,
123 NFSV2PROC_REMOVE,
124 NFSV2PROC_RMDIR,
125 NFSV2PROC_RENAME,
126 NFSV2PROC_LINK,
127 NFSV2PROC_READDIR,
128 NFSV2PROC_NOOP,
129 NFSV2PROC_STATFS,
130 NFSV2PROC_NOOP,
131 NFSV2PROC_NOOP,
132 NFSV2PROC_NOOP,
133 NFSV2PROC_NOOP,
134};
135
136LIST_HEAD(nfsnodehashhead, nfsnode);
137
138u_int32_t
139nfs_xid_gen(void)
140{
141 uint32_t xid;
142
143 mtx_lock(&nfs_xid_mtx);
144
145 /* Get a pretty random xid to start with */
146 if (!nfs_xid)
147 nfs_xid = random();
148 /*
149 * Skip zero xid if it should ever happen.
150 */
151 if (++nfs_xid == 0)
152 nfs_xid++;
153 xid = nfs_xid;
154 mtx_unlock(&nfs_xid_mtx);
155 return xid;
156}
157
158/*
159 * Create the header for an rpc request packet
160 * The hsiz is the size of the rest of the nfs request header.
161 * (just used to decide if a cluster is a good idea)
162 */
163struct mbuf *
164nfsm_reqhead(struct vnode *vp, u_long procid, int hsiz)
165{
166 struct mbuf *mb;
167
168 MGET(mb, M_TRYWAIT, MT_DATA);
169 if (hsiz >= MINCLSIZE)
170 MCLGET(mb, M_TRYWAIT);
171 mb->m_len = 0;
172 return (mb);
173}
174
175/*
176 * Build the RPC header and fill in the authorization info.
177 * The authorization string argument is only used when the credentials
178 * come from outside of the kernel.
179 * Returns the head of the mbuf list.
180 */
181struct mbuf *
182nfsm_rpchead(struct ucred *cr, int nmflag, int procid, int auth_type,
183 int auth_len, struct mbuf *mrest, int mrest_len, struct mbuf **mbp,
184 u_int32_t **xidpp)
185{
186 struct mbuf *mb;
187 u_int32_t *tl;
188 caddr_t bpos;
189 int i;
190 struct mbuf *mreq;
191 int grpsiz, authsiz;
192
193 authsiz = nfsm_rndup(auth_len);
194 MGETHDR(mb, M_TRYWAIT, MT_DATA);
195 if ((authsiz + 10 * NFSX_UNSIGNED) >= MINCLSIZE) {
196 MCLGET(mb, M_TRYWAIT);
197 } else if ((authsiz + 10 * NFSX_UNSIGNED) < MHLEN) {
198 MH_ALIGN(mb, authsiz + 10 * NFSX_UNSIGNED);
199 } else {
200 MH_ALIGN(mb, 8 * NFSX_UNSIGNED);
201 }
202 mb->m_len = 0;
203 mreq = mb;
204 bpos = mtod(mb, caddr_t);
205
206 /*
207 * First the RPC header.
208 */
209 tl = nfsm_build(u_int32_t *, 8 * NFSX_UNSIGNED);
210
211 *xidpp = tl;
212 *tl++ = txdr_unsigned(nfs_xid_gen());
213 *tl++ = rpc_call;
214 *tl++ = rpc_vers;
215 *tl++ = txdr_unsigned(NFS_PROG);
216 if (nmflag & NFSMNT_NFSV3) {
217 *tl++ = txdr_unsigned(NFS_VER3);
218 *tl++ = txdr_unsigned(procid);
219 } else {
220 *tl++ = txdr_unsigned(NFS_VER2);
221 *tl++ = txdr_unsigned(nfsv2_procid[procid]);
222 }
223
224 /*
225 * And then the authorization cred.
226 */
227 *tl++ = txdr_unsigned(auth_type);
228 *tl = txdr_unsigned(authsiz);
229 switch (auth_type) {
230 case RPCAUTH_UNIX:
231 tl = nfsm_build(u_int32_t *, auth_len);
232 *tl++ = 0; /* stamp ?? */
233 *tl++ = 0; /* NULL hostname */
234 *tl++ = txdr_unsigned(cr->cr_uid);
235 *tl++ = txdr_unsigned(cr->cr_groups[0]);
236 grpsiz = (auth_len >> 2) - 5;
237 *tl++ = txdr_unsigned(grpsiz);
238 for (i = 1; i <= grpsiz; i++)
239 *tl++ = txdr_unsigned(cr->cr_groups[i]);
240 break;
241 }
242
243 /*
244 * And the verifier...
245 */
246 tl = nfsm_build(u_int32_t *, 2 * NFSX_UNSIGNED);
247 *tl++ = txdr_unsigned(RPCAUTH_NULL);
248 *tl = 0;
249 mb->m_next = mrest;
250 mreq->m_pkthdr.len = authsiz + 10 * NFSX_UNSIGNED + mrest_len;
251 mreq->m_pkthdr.rcvif = NULL;
252 *mbp = mb;
253 return (mreq);
254}
255
256/*
257 * copies a uio scatter/gather list to an mbuf chain.
258 * NOTE: can ony handle iovcnt == 1
259 */
260int
261nfsm_uiotombuf(struct uio *uiop, struct mbuf **mq, int siz, caddr_t *bpos)
262{
263 char *uiocp;
264 struct mbuf *mp, *mp2;
265 int xfer, left, mlen;
266 int uiosiz, clflg, rem;
267 char *cp;
268
269#ifdef DIAGNOSTIC
270 if (uiop->uio_iovcnt != 1)
271 panic("nfsm_uiotombuf: iovcnt != 1");
272#endif
273
274 if (siz > MLEN) /* or should it >= MCLBYTES ?? */
275 clflg = 1;
276 else
277 clflg = 0;
278 rem = nfsm_rndup(siz)-siz;
279 mp = mp2 = *mq;
280 while (siz > 0) {
281 left = uiop->uio_iov->iov_len;
282 uiocp = uiop->uio_iov->iov_base;
283 if (left > siz)
284 left = siz;
285 uiosiz = left;
286 while (left > 0) {
287 mlen = M_TRAILINGSPACE(mp);
288 if (mlen == 0) {
289 MGET(mp, M_TRYWAIT, MT_DATA);
290 if (clflg)
291 MCLGET(mp, M_TRYWAIT);
292 mp->m_len = 0;
293 mp2->m_next = mp;
294 mp2 = mp;
295 mlen = M_TRAILINGSPACE(mp);
296 }
297 xfer = (left > mlen) ? mlen : left;
298#ifdef notdef
299 /* Not Yet.. */
300 if (uiop->uio_iov->iov_op != NULL)
301 (*(uiop->uio_iov->iov_op))
302 (uiocp, mtod(mp, caddr_t)+mp->m_len, xfer);
303 else
304#endif
305 if (uiop->uio_segflg == UIO_SYSSPACE)
306 bcopy(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer);
307 else
308 copyin(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer);
309 mp->m_len += xfer;
310 left -= xfer;
311 uiocp += xfer;
312 uiop->uio_offset += xfer;
313 uiop->uio_resid -= xfer;
314 }
315 uiop->uio_iov->iov_base =
316 (char *)uiop->uio_iov->iov_base + uiosiz;
317 uiop->uio_iov->iov_len -= uiosiz;
318 siz -= uiosiz;
319 }
320 if (rem > 0) {
321 if (rem > M_TRAILINGSPACE(mp)) {
322 MGET(mp, M_TRYWAIT, MT_DATA);
323 mp->m_len = 0;
324 mp2->m_next = mp;
325 }
326 cp = mtod(mp, caddr_t)+mp->m_len;
327 for (left = 0; left < rem; left++)
328 *cp++ = '\0';
329 mp->m_len += rem;
330 *bpos = cp;
331 } else
332 *bpos = mtod(mp, caddr_t)+mp->m_len;
333 *mq = mp;
334 return (0);
335}
336
337/*
338 * Copy a string into mbufs for the hard cases...
339 */
340int
341nfsm_strtmbuf(struct mbuf **mb, char **bpos, const char *cp, long siz)
342{
343 struct mbuf *m1 = NULL, *m2;
344 long left, xfer, len, tlen;
345 u_int32_t *tl;
346 int putsize;
347
348 putsize = 1;
349 m2 = *mb;
350 left = M_TRAILINGSPACE(m2);
351 if (left > 0) {
352 tl = ((u_int32_t *)(*bpos));
353 *tl++ = txdr_unsigned(siz);
354 putsize = 0;
355 left -= NFSX_UNSIGNED;
356 m2->m_len += NFSX_UNSIGNED;
357 if (left > 0) {
358 bcopy(cp, (caddr_t) tl, left);
359 siz -= left;
360 cp += left;
361 m2->m_len += left;
362 left = 0;
363 }
364 }
365 /* Loop around adding mbufs */
366 while (siz > 0) {
367 MGET(m1, M_TRYWAIT, MT_DATA);
368 if (siz > MLEN)
369 MCLGET(m1, M_TRYWAIT);
370 m1->m_len = NFSMSIZ(m1);
371 m2->m_next = m1;
372 m2 = m1;
373 tl = mtod(m1, u_int32_t *);
374 tlen = 0;
375 if (putsize) {
376 *tl++ = txdr_unsigned(siz);
377 m1->m_len -= NFSX_UNSIGNED;
378 tlen = NFSX_UNSIGNED;
379 putsize = 0;
380 }
381 if (siz < m1->m_len) {
382 len = nfsm_rndup(siz);
383 xfer = siz;
384 if (xfer < len)
385 *(tl+(xfer>>2)) = 0;
386 } else {
387 xfer = len = m1->m_len;
388 }
389 bcopy(cp, (caddr_t) tl, xfer);
390 m1->m_len = len+tlen;
391 siz -= xfer;
392 cp += xfer;
393 }
394 *mb = m1;
395 *bpos = mtod(m1, caddr_t)+m1->m_len;
396 return (0);
397}
398
399/*
400 * Called once to initialize data structures...
401 */
402int
403nfs_init(struct vfsconf *vfsp)
404{
405 int i;
406
407 nfsmount_zone = uma_zcreate("NFSMOUNT", sizeof(struct nfsmount),
408 NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, 0);
409 rpc_vers = txdr_unsigned(RPC_VER2);
410 rpc_call = txdr_unsigned(RPC_CALL);
411 rpc_reply = txdr_unsigned(RPC_REPLY);
412 rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED);
413 rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED);
414 rpc_mismatch = txdr_unsigned(RPC_MISMATCH);
415 rpc_autherr = txdr_unsigned(RPC_AUTHERR);
416 rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX);
417 nfs_true = txdr_unsigned(TRUE);
418 nfs_false = txdr_unsigned(FALSE);
419 nfs_xdrneg1 = txdr_unsigned(-1);
420 nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000;
421 if (nfs_ticks < 1)
422 nfs_ticks = 1;
423 /* Ensure async daemons disabled */
424 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) {
425 nfs_iodwant[i] = NULL;
426 nfs_iodmount[i] = NULL;
427 }
428 nfs_nhinit(); /* Init the nfsnode table */
429
430 /*
431 * Initialize reply list and start timer
432 */
433 TAILQ_INIT(&nfs_reqq);
434 callout_init(&nfs_callout, CALLOUT_MPSAFE);
435 mtx_init(&nfs_reqq_mtx, "NFS reqq lock", NULL, MTX_DEF);
436 mtx_init(&nfs_iod_mtx, "NFS iod lock", NULL, MTX_DEF);
437 mtx_init(&nfs_xid_mtx, "NFS xid lock", NULL, MTX_DEF);
438
439 nfs_pbuf_freecnt = nswbuf / 2 + 1;
440
441 return (0);
442}
443
444int
445nfs_uninit(struct vfsconf *vfsp)
446{
447 int i;
448
449 callout_stop(&nfs_callout);
450
451 KASSERT(TAILQ_EMPTY(&nfs_reqq),
452 ("nfs_uninit: request queue not empty"));
453
454 /*
455 * Tell all nfsiod processes to exit. Clear nfs_iodmax, and wakeup
456 * any sleeping nfsiods so they check nfs_iodmax and exit.
457 */
458 mtx_lock(&nfs_iod_mtx);
459 nfs_iodmax = 0;
460 for (i = 0; i < nfs_numasync; i++)
461 if (nfs_iodwant[i])
462 wakeup(&nfs_iodwant[i]);
463 /* The last nfsiod to exit will wake us up when nfs_numasync hits 0 */
464 while (nfs_numasync)
465 msleep(&nfs_numasync, &nfs_iod_mtx, PWAIT, "ioddie", 0);
466 mtx_unlock(&nfs_iod_mtx);
467 nfs_nhuninit();
468 uma_zdestroy(nfsmount_zone);
469 return (0);
470}
471
472void
473nfs_dircookie_lock(struct nfsnode *np)
474{
475 mtx_lock(&np->n_mtx);
476 while (np->n_flag & NDIRCOOKIELK)
477 (void) msleep(&np->n_flag, &np->n_mtx, PZERO, "nfsdirlk", 0);
478 np->n_flag |= NDIRCOOKIELK;
479 mtx_unlock(&np->n_mtx);
480}
481
482void
483nfs_dircookie_unlock(struct nfsnode *np)
484{
485 mtx_lock(&np->n_mtx);
486 np->n_flag &= ~NDIRCOOKIELK;
487 wakeup(&np->n_flag);
488 mtx_unlock(&np->n_mtx);
489}
490
491int
492nfs_upgrade_vnlock(struct vnode *vp)
493{
494 int old_lock;
495
| 37
38/*
39 * These functions support the macros and help fiddle mbuf chains for
40 * the nfs op functions. They do things like create the rpc header and
41 * copy data between mbuf chains and uio lists.
42 */
43
44#include <sys/param.h>
45#include <sys/systm.h>
46#include <sys/kernel.h>
47#include <sys/bio.h>
48#include <sys/buf.h>
49#include <sys/proc.h>
50#include <sys/mount.h>
51#include <sys/vnode.h>
52#include <sys/namei.h>
53#include <sys/mbuf.h>
54#include <sys/socket.h>
55#include <sys/stat.h>
56#include <sys/malloc.h>
57#include <sys/sysent.h>
58#include <sys/syscall.h>
59#include <sys/sysproto.h>
60
61#include <vm/vm.h>
62#include <vm/vm_object.h>
63#include <vm/vm_extern.h>
64#include <vm/uma.h>
65
66#include <rpc/rpcclnt.h>
67
68#include <nfs/rpcv2.h>
69#include <nfs/nfsproto.h>
70#include <nfsclient/nfs.h>
71#include <nfsclient/nfsnode.h>
72#include <nfs/xdr_subs.h>
73#include <nfsclient/nfsm_subs.h>
74#include <nfsclient/nfsmount.h>
75
76#include <netinet/in.h>
77
78/*
79 * Note that stdarg.h and the ANSI style va_start macro is used for both
80 * ANSI and traditional C compilers.
81 */
82#include <machine/stdarg.h>
83
84/*
85 * Data items converted to xdr at startup, since they are constant
86 * This is kinda hokey, but may save a little time doing byte swaps
87 */
88u_int32_t nfs_xdrneg1;
89u_int32_t rpc_call, rpc_vers, rpc_reply, rpc_msgdenied, rpc_autherr,
90 rpc_mismatch, rpc_auth_unix, rpc_msgaccepted;
91u_int32_t nfs_true, nfs_false;
92
93/* And other global data */
94static u_int32_t nfs_xid = 0;
95static enum vtype nv2tov_type[8]= {
96 VNON, VREG, VDIR, VBLK, VCHR, VLNK, VNON, VNON
97};
98
99int nfs_ticks;
100int nfs_pbuf_freecnt = -1; /* start out unlimited */
101
102struct nfs_reqq nfs_reqq;
103struct mtx nfs_reqq_mtx;
104struct nfs_bufq nfs_bufq;
105static struct mtx nfs_xid_mtx;
106
107/*
108 * and the reverse mapping from generic to Version 2 procedure numbers
109 */
110int nfsv2_procid[NFS_NPROCS] = {
111 NFSV2PROC_NULL,
112 NFSV2PROC_GETATTR,
113 NFSV2PROC_SETATTR,
114 NFSV2PROC_LOOKUP,
115 NFSV2PROC_NOOP,
116 NFSV2PROC_READLINK,
117 NFSV2PROC_READ,
118 NFSV2PROC_WRITE,
119 NFSV2PROC_CREATE,
120 NFSV2PROC_MKDIR,
121 NFSV2PROC_SYMLINK,
122 NFSV2PROC_CREATE,
123 NFSV2PROC_REMOVE,
124 NFSV2PROC_RMDIR,
125 NFSV2PROC_RENAME,
126 NFSV2PROC_LINK,
127 NFSV2PROC_READDIR,
128 NFSV2PROC_NOOP,
129 NFSV2PROC_STATFS,
130 NFSV2PROC_NOOP,
131 NFSV2PROC_NOOP,
132 NFSV2PROC_NOOP,
133 NFSV2PROC_NOOP,
134};
135
136LIST_HEAD(nfsnodehashhead, nfsnode);
137
138u_int32_t
139nfs_xid_gen(void)
140{
141 uint32_t xid;
142
143 mtx_lock(&nfs_xid_mtx);
144
145 /* Get a pretty random xid to start with */
146 if (!nfs_xid)
147 nfs_xid = random();
148 /*
149 * Skip zero xid if it should ever happen.
150 */
151 if (++nfs_xid == 0)
152 nfs_xid++;
153 xid = nfs_xid;
154 mtx_unlock(&nfs_xid_mtx);
155 return xid;
156}
157
158/*
159 * Create the header for an rpc request packet
160 * The hsiz is the size of the rest of the nfs request header.
161 * (just used to decide if a cluster is a good idea)
162 */
163struct mbuf *
164nfsm_reqhead(struct vnode *vp, u_long procid, int hsiz)
165{
166 struct mbuf *mb;
167
168 MGET(mb, M_TRYWAIT, MT_DATA);
169 if (hsiz >= MINCLSIZE)
170 MCLGET(mb, M_TRYWAIT);
171 mb->m_len = 0;
172 return (mb);
173}
174
175/*
176 * Build the RPC header and fill in the authorization info.
177 * The authorization string argument is only used when the credentials
178 * come from outside of the kernel.
179 * Returns the head of the mbuf list.
180 */
181struct mbuf *
182nfsm_rpchead(struct ucred *cr, int nmflag, int procid, int auth_type,
183 int auth_len, struct mbuf *mrest, int mrest_len, struct mbuf **mbp,
184 u_int32_t **xidpp)
185{
186 struct mbuf *mb;
187 u_int32_t *tl;
188 caddr_t bpos;
189 int i;
190 struct mbuf *mreq;
191 int grpsiz, authsiz;
192
193 authsiz = nfsm_rndup(auth_len);
194 MGETHDR(mb, M_TRYWAIT, MT_DATA);
195 if ((authsiz + 10 * NFSX_UNSIGNED) >= MINCLSIZE) {
196 MCLGET(mb, M_TRYWAIT);
197 } else if ((authsiz + 10 * NFSX_UNSIGNED) < MHLEN) {
198 MH_ALIGN(mb, authsiz + 10 * NFSX_UNSIGNED);
199 } else {
200 MH_ALIGN(mb, 8 * NFSX_UNSIGNED);
201 }
202 mb->m_len = 0;
203 mreq = mb;
204 bpos = mtod(mb, caddr_t);
205
206 /*
207 * First the RPC header.
208 */
209 tl = nfsm_build(u_int32_t *, 8 * NFSX_UNSIGNED);
210
211 *xidpp = tl;
212 *tl++ = txdr_unsigned(nfs_xid_gen());
213 *tl++ = rpc_call;
214 *tl++ = rpc_vers;
215 *tl++ = txdr_unsigned(NFS_PROG);
216 if (nmflag & NFSMNT_NFSV3) {
217 *tl++ = txdr_unsigned(NFS_VER3);
218 *tl++ = txdr_unsigned(procid);
219 } else {
220 *tl++ = txdr_unsigned(NFS_VER2);
221 *tl++ = txdr_unsigned(nfsv2_procid[procid]);
222 }
223
224 /*
225 * And then the authorization cred.
226 */
227 *tl++ = txdr_unsigned(auth_type);
228 *tl = txdr_unsigned(authsiz);
229 switch (auth_type) {
230 case RPCAUTH_UNIX:
231 tl = nfsm_build(u_int32_t *, auth_len);
232 *tl++ = 0; /* stamp ?? */
233 *tl++ = 0; /* NULL hostname */
234 *tl++ = txdr_unsigned(cr->cr_uid);
235 *tl++ = txdr_unsigned(cr->cr_groups[0]);
236 grpsiz = (auth_len >> 2) - 5;
237 *tl++ = txdr_unsigned(grpsiz);
238 for (i = 1; i <= grpsiz; i++)
239 *tl++ = txdr_unsigned(cr->cr_groups[i]);
240 break;
241 }
242
243 /*
244 * And the verifier...
245 */
246 tl = nfsm_build(u_int32_t *, 2 * NFSX_UNSIGNED);
247 *tl++ = txdr_unsigned(RPCAUTH_NULL);
248 *tl = 0;
249 mb->m_next = mrest;
250 mreq->m_pkthdr.len = authsiz + 10 * NFSX_UNSIGNED + mrest_len;
251 mreq->m_pkthdr.rcvif = NULL;
252 *mbp = mb;
253 return (mreq);
254}
255
256/*
257 * copies a uio scatter/gather list to an mbuf chain.
258 * NOTE: can ony handle iovcnt == 1
259 */
260int
261nfsm_uiotombuf(struct uio *uiop, struct mbuf **mq, int siz, caddr_t *bpos)
262{
263 char *uiocp;
264 struct mbuf *mp, *mp2;
265 int xfer, left, mlen;
266 int uiosiz, clflg, rem;
267 char *cp;
268
269#ifdef DIAGNOSTIC
270 if (uiop->uio_iovcnt != 1)
271 panic("nfsm_uiotombuf: iovcnt != 1");
272#endif
273
274 if (siz > MLEN) /* or should it >= MCLBYTES ?? */
275 clflg = 1;
276 else
277 clflg = 0;
278 rem = nfsm_rndup(siz)-siz;
279 mp = mp2 = *mq;
280 while (siz > 0) {
281 left = uiop->uio_iov->iov_len;
282 uiocp = uiop->uio_iov->iov_base;
283 if (left > siz)
284 left = siz;
285 uiosiz = left;
286 while (left > 0) {
287 mlen = M_TRAILINGSPACE(mp);
288 if (mlen == 0) {
289 MGET(mp, M_TRYWAIT, MT_DATA);
290 if (clflg)
291 MCLGET(mp, M_TRYWAIT);
292 mp->m_len = 0;
293 mp2->m_next = mp;
294 mp2 = mp;
295 mlen = M_TRAILINGSPACE(mp);
296 }
297 xfer = (left > mlen) ? mlen : left;
298#ifdef notdef
299 /* Not Yet.. */
300 if (uiop->uio_iov->iov_op != NULL)
301 (*(uiop->uio_iov->iov_op))
302 (uiocp, mtod(mp, caddr_t)+mp->m_len, xfer);
303 else
304#endif
305 if (uiop->uio_segflg == UIO_SYSSPACE)
306 bcopy(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer);
307 else
308 copyin(uiocp, mtod(mp, caddr_t)+mp->m_len, xfer);
309 mp->m_len += xfer;
310 left -= xfer;
311 uiocp += xfer;
312 uiop->uio_offset += xfer;
313 uiop->uio_resid -= xfer;
314 }
315 uiop->uio_iov->iov_base =
316 (char *)uiop->uio_iov->iov_base + uiosiz;
317 uiop->uio_iov->iov_len -= uiosiz;
318 siz -= uiosiz;
319 }
320 if (rem > 0) {
321 if (rem > M_TRAILINGSPACE(mp)) {
322 MGET(mp, M_TRYWAIT, MT_DATA);
323 mp->m_len = 0;
324 mp2->m_next = mp;
325 }
326 cp = mtod(mp, caddr_t)+mp->m_len;
327 for (left = 0; left < rem; left++)
328 *cp++ = '\0';
329 mp->m_len += rem;
330 *bpos = cp;
331 } else
332 *bpos = mtod(mp, caddr_t)+mp->m_len;
333 *mq = mp;
334 return (0);
335}
336
337/*
338 * Copy a string into mbufs for the hard cases...
339 */
340int
341nfsm_strtmbuf(struct mbuf **mb, char **bpos, const char *cp, long siz)
342{
343 struct mbuf *m1 = NULL, *m2;
344 long left, xfer, len, tlen;
345 u_int32_t *tl;
346 int putsize;
347
348 putsize = 1;
349 m2 = *mb;
350 left = M_TRAILINGSPACE(m2);
351 if (left > 0) {
352 tl = ((u_int32_t *)(*bpos));
353 *tl++ = txdr_unsigned(siz);
354 putsize = 0;
355 left -= NFSX_UNSIGNED;
356 m2->m_len += NFSX_UNSIGNED;
357 if (left > 0) {
358 bcopy(cp, (caddr_t) tl, left);
359 siz -= left;
360 cp += left;
361 m2->m_len += left;
362 left = 0;
363 }
364 }
365 /* Loop around adding mbufs */
366 while (siz > 0) {
367 MGET(m1, M_TRYWAIT, MT_DATA);
368 if (siz > MLEN)
369 MCLGET(m1, M_TRYWAIT);
370 m1->m_len = NFSMSIZ(m1);
371 m2->m_next = m1;
372 m2 = m1;
373 tl = mtod(m1, u_int32_t *);
374 tlen = 0;
375 if (putsize) {
376 *tl++ = txdr_unsigned(siz);
377 m1->m_len -= NFSX_UNSIGNED;
378 tlen = NFSX_UNSIGNED;
379 putsize = 0;
380 }
381 if (siz < m1->m_len) {
382 len = nfsm_rndup(siz);
383 xfer = siz;
384 if (xfer < len)
385 *(tl+(xfer>>2)) = 0;
386 } else {
387 xfer = len = m1->m_len;
388 }
389 bcopy(cp, (caddr_t) tl, xfer);
390 m1->m_len = len+tlen;
391 siz -= xfer;
392 cp += xfer;
393 }
394 *mb = m1;
395 *bpos = mtod(m1, caddr_t)+m1->m_len;
396 return (0);
397}
398
399/*
400 * Called once to initialize data structures...
401 */
402int
403nfs_init(struct vfsconf *vfsp)
404{
405 int i;
406
407 nfsmount_zone = uma_zcreate("NFSMOUNT", sizeof(struct nfsmount),
408 NULL, NULL, NULL, NULL, UMA_ALIGN_PTR, 0);
409 rpc_vers = txdr_unsigned(RPC_VER2);
410 rpc_call = txdr_unsigned(RPC_CALL);
411 rpc_reply = txdr_unsigned(RPC_REPLY);
412 rpc_msgdenied = txdr_unsigned(RPC_MSGDENIED);
413 rpc_msgaccepted = txdr_unsigned(RPC_MSGACCEPTED);
414 rpc_mismatch = txdr_unsigned(RPC_MISMATCH);
415 rpc_autherr = txdr_unsigned(RPC_AUTHERR);
416 rpc_auth_unix = txdr_unsigned(RPCAUTH_UNIX);
417 nfs_true = txdr_unsigned(TRUE);
418 nfs_false = txdr_unsigned(FALSE);
419 nfs_xdrneg1 = txdr_unsigned(-1);
420 nfs_ticks = (hz * NFS_TICKINTVL + 500) / 1000;
421 if (nfs_ticks < 1)
422 nfs_ticks = 1;
423 /* Ensure async daemons disabled */
424 for (i = 0; i < NFS_MAXASYNCDAEMON; i++) {
425 nfs_iodwant[i] = NULL;
426 nfs_iodmount[i] = NULL;
427 }
428 nfs_nhinit(); /* Init the nfsnode table */
429
430 /*
431 * Initialize reply list and start timer
432 */
433 TAILQ_INIT(&nfs_reqq);
434 callout_init(&nfs_callout, CALLOUT_MPSAFE);
435 mtx_init(&nfs_reqq_mtx, "NFS reqq lock", NULL, MTX_DEF);
436 mtx_init(&nfs_iod_mtx, "NFS iod lock", NULL, MTX_DEF);
437 mtx_init(&nfs_xid_mtx, "NFS xid lock", NULL, MTX_DEF);
438
439 nfs_pbuf_freecnt = nswbuf / 2 + 1;
440
441 return (0);
442}
443
444int
445nfs_uninit(struct vfsconf *vfsp)
446{
447 int i;
448
449 callout_stop(&nfs_callout);
450
451 KASSERT(TAILQ_EMPTY(&nfs_reqq),
452 ("nfs_uninit: request queue not empty"));
453
454 /*
455 * Tell all nfsiod processes to exit. Clear nfs_iodmax, and wakeup
456 * any sleeping nfsiods so they check nfs_iodmax and exit.
457 */
458 mtx_lock(&nfs_iod_mtx);
459 nfs_iodmax = 0;
460 for (i = 0; i < nfs_numasync; i++)
461 if (nfs_iodwant[i])
462 wakeup(&nfs_iodwant[i]);
463 /* The last nfsiod to exit will wake us up when nfs_numasync hits 0 */
464 while (nfs_numasync)
465 msleep(&nfs_numasync, &nfs_iod_mtx, PWAIT, "ioddie", 0);
466 mtx_unlock(&nfs_iod_mtx);
467 nfs_nhuninit();
468 uma_zdestroy(nfsmount_zone);
469 return (0);
470}
471
472void
473nfs_dircookie_lock(struct nfsnode *np)
474{
475 mtx_lock(&np->n_mtx);
476 while (np->n_flag & NDIRCOOKIELK)
477 (void) msleep(&np->n_flag, &np->n_mtx, PZERO, "nfsdirlk", 0);
478 np->n_flag |= NDIRCOOKIELK;
479 mtx_unlock(&np->n_mtx);
480}
481
482void
483nfs_dircookie_unlock(struct nfsnode *np)
484{
485 mtx_lock(&np->n_mtx);
486 np->n_flag &= ~NDIRCOOKIELK;
487 wakeup(&np->n_flag);
488 mtx_unlock(&np->n_mtx);
489}
490
491int
492nfs_upgrade_vnlock(struct vnode *vp)
493{
494 int old_lock;
495
|
497 if (old_lock == LK_SHARED) {
498 /* Upgrade to exclusive lock, this might block */
499 vn_lock(vp, LK_UPGRADE | LK_RETRY);
500 } else {
501 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
502 }
503 }
504 return old_lock;
505}
506
507void
508nfs_downgrade_vnlock(struct vnode *vp, int old_lock)
509{
510 if (old_lock != LK_EXCLUSIVE) {
511 if (old_lock == LK_SHARED) {
512 /* Downgrade from exclusive lock, this might block */
513 vn_lock(vp, LK_DOWNGRADE);
514 } else {
515 VOP_UNLOCK(vp, 0);
516 }
517 }
518}
519
520void
521nfs_printf(const char *fmt, ...)
522{
523 va_list ap;
524
525 mtx_lock(&Giant);
526 va_start(ap, fmt);
527 printf(fmt, ap);
528 va_end(ap);
529 mtx_unlock(&Giant);
530}
531
532/*
533 * Attribute cache routines.
534 * nfs_loadattrcache() - loads or updates the cache contents from attributes
535 * that are on the mbuf list
536 * nfs_getattrcache() - returns valid attributes if found in cache, returns
537 * error otherwise
538 */
539
540/*
541 * Load the attribute cache (that lives in the nfsnode entry) with
542 * the values on the mbuf list and
543 * Iff vap not NULL
544 * copy the attributes to *vaper
545 */
546int
547nfs_loadattrcache(struct vnode **vpp, struct mbuf **mdp, caddr_t *dposp,
548 struct vattr *vaper, int dontshrink)
549{
550 struct vnode *vp = *vpp;
551 struct vattr *vap;
552 struct nfs_fattr *fp;
553 struct nfsnode *np;
554 int32_t t1;
555 caddr_t cp2;
556 int rdev;
557 struct mbuf *md;
558 enum vtype vtyp;
559 u_short vmode;
560 struct timespec mtime, mtime_save;
561 int v3 = NFS_ISV3(vp);
562 struct thread *td = curthread;
563
564 md = *mdp;
565 t1 = (mtod(md, caddr_t) + md->m_len) - *dposp;
566 cp2 = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, M_TRYWAIT);
567 if (cp2 == NULL)
568 return EBADRPC;
569 fp = (struct nfs_fattr *)cp2;
570 if (v3) {
571 vtyp = nfsv3tov_type(fp->fa_type);
572 vmode = fxdr_unsigned(u_short, fp->fa_mode);
573 rdev = makedev(fxdr_unsigned(int, fp->fa3_rdev.specdata1),
574 fxdr_unsigned(int, fp->fa3_rdev.specdata2));
575 fxdr_nfsv3time(&fp->fa3_mtime, &mtime);
576 } else {
577 vtyp = nfsv2tov_type(fp->fa_type);
578 vmode = fxdr_unsigned(u_short, fp->fa_mode);
579 /*
580 * XXX
581 *
582 * The duplicate information returned in fa_type and fa_mode
583 * is an ambiguity in the NFS version 2 protocol.
584 *
585 * VREG should be taken literally as a regular file. If a
586 * server intents to return some type information differently
587 * in the upper bits of the mode field (e.g. for sockets, or
588 * FIFOs), NFSv2 mandates fa_type to be VNON. Anyway, we
589 * leave the examination of the mode bits even in the VREG
590 * case to avoid breakage for bogus servers, but we make sure
591 * that there are actually type bits set in the upper part of
592 * fa_mode (and failing that, trust the va_type field).
593 *
594 * NFSv3 cleared the issue, and requires fa_mode to not
595 * contain any type information (while also introduing sockets
596 * and FIFOs for fa_type).
597 */
598 if (vtyp == VNON || (vtyp == VREG && (vmode & S_IFMT) != 0))
599 vtyp = IFTOVT(vmode);
600 rdev = fxdr_unsigned(int32_t, fp->fa2_rdev);
601 fxdr_nfsv2time(&fp->fa2_mtime, &mtime);
602
603 /*
604 * Really ugly NFSv2 kludge.
605 */
606 if (vtyp == VCHR && rdev == 0xffffffff)
607 vtyp = VFIFO;
608 }
609
610 /*
611 * If v_type == VNON it is a new node, so fill in the v_type,
612 * n_mtime fields. Check to see if it represents a special
613 * device, and if so, check for a possible alias. Once the
614 * correct vnode has been obtained, fill in the rest of the
615 * information.
616 */
617 np = VTONFS(vp);
618 mtx_lock(&np->n_mtx);
619 if (vp->v_type != vtyp) {
620 vp->v_type = vtyp;
621 if (vp->v_type == VFIFO)
622 vp->v_op = &nfs_fifoops;
623 np->n_mtime = mtime;
624 }
625 vap = &np->n_vattr;
626 vap->va_type = vtyp;
627 vap->va_mode = (vmode & 07777);
628 vap->va_rdev = rdev;
629 mtime_save = vap->va_mtime;
630 vap->va_mtime = mtime;
631 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0];
632 if (v3) {
633 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink);
634 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid);
635 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid);
636 vap->va_size = fxdr_hyper(&fp->fa3_size);
637 vap->va_blocksize = NFS_FABLKSIZE;
638 vap->va_bytes = fxdr_hyper(&fp->fa3_used);
639 vap->va_fileid = fxdr_unsigned(int32_t,
640 fp->fa3_fileid.nfsuquad[1]);
641 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime);
642 fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime);
643 vap->va_flags = 0;
644 vap->va_filerev = 0;
645 } else {
646 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink);
647 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid);
648 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid);
649 vap->va_size = fxdr_unsigned(u_int32_t, fp->fa2_size);
650 vap->va_blocksize = fxdr_unsigned(int32_t, fp->fa2_blocksize);
651 vap->va_bytes = (u_quad_t)fxdr_unsigned(int32_t, fp->fa2_blocks)
652 * NFS_FABLKSIZE;
653 vap->va_fileid = fxdr_unsigned(int32_t, fp->fa2_fileid);
654 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime);
655 vap->va_flags = 0;
656 vap->va_ctime.tv_sec = fxdr_unsigned(u_int32_t,
657 fp->fa2_ctime.nfsv2_sec);
658 vap->va_ctime.tv_nsec = 0;
659 vap->va_gen = fxdr_unsigned(u_int32_t, fp->fa2_ctime.nfsv2_usec);
660 vap->va_filerev = 0;
661 }
662 np->n_attrstamp = time_second;
663 /* Timestamp the NFS otw getattr fetch */
664 if (td->td_proc) {
665 np->n_ac_ts_tid = td->td_tid;
666 np->n_ac_ts_pid = td->td_proc->p_pid;
667 np->n_ac_ts_syscalls = td->td_syscalls;
668 } else
669 bzero(&np->n_ac_ts, sizeof(struct nfs_attrcache_timestamp));
670
671 if (vap->va_size != np->n_size) {
672 if (vap->va_type == VREG) {
673 if (dontshrink && vap->va_size < np->n_size) {
674 /*
675 * We've been told not to shrink the file;
676 * zero np->n_attrstamp to indicate that
677 * the attributes are stale.
678 */
679 vap->va_size = np->n_size;
680 np->n_attrstamp = 0;
681 } else if (np->n_flag & NMODIFIED) {
682 /*
683 * We've modified the file: Use the larger
684 * of our size, and the server's size.
685 */
686 if (vap->va_size < np->n_size) {
687 vap->va_size = np->n_size;
688 } else {
689 np->n_size = vap->va_size;
690 np->n_flag |= NSIZECHANGED;
691 }
692 } else {
693 np->n_size = vap->va_size;
694 np->n_flag |= NSIZECHANGED;
695 }
696 vnode_pager_setsize(vp, np->n_size);
697 } else {
698 np->n_size = vap->va_size;
699 }
700 }
701 /*
702 * The following checks are added to prevent a race between (say)
703 * a READDIR+ and a WRITE.
704 * READDIR+, WRITE requests sent out.
705 * READDIR+ resp, WRITE resp received on client.
706 * However, the WRITE resp was handled before the READDIR+ resp
707 * causing the post op attrs from the write to be loaded first
708 * and the attrs from the READDIR+ to be loaded later. If this
709 * happens, we have stale attrs loaded into the attrcache.
710 * We detect this by for the mtime moving back. We invalidate the
711 * attrcache when this happens.
712 */
713 if (timespeccmp(&mtime_save, &vap->va_mtime, >))
714 /* Size changed or mtime went backwards */
715 np->n_attrstamp = 0;
716 if (vaper != NULL) {
717 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap));
718 if (np->n_flag & NCHG) {
719 if (np->n_flag & NACC)
720 vaper->va_atime = np->n_atim;
721 if (np->n_flag & NUPD)
722 vaper->va_mtime = np->n_mtim;
723 }
724 }
725 mtx_unlock(&np->n_mtx);
726 return (0);
727}
728
729#ifdef NFS_ACDEBUG
730#include <sys/sysctl.h>
731SYSCTL_DECL(_vfs_nfs);
732static int nfs_acdebug;
733SYSCTL_INT(_vfs_nfs, OID_AUTO, acdebug, CTLFLAG_RW, &nfs_acdebug, 0, "");
734#endif
735
736/*
737 * Check the time stamp
738 * If the cache is valid, copy contents to *vap and return 0
739 * otherwise return an error
740 */
741int
742nfs_getattrcache(struct vnode *vp, struct vattr *vaper)
743{
744 struct nfsnode *np;
745 struct vattr *vap;
746 struct nfsmount *nmp;
747 int timeo;
748
749 np = VTONFS(vp);
750 vap = &np->n_vattr;
751 nmp = VFSTONFS(vp->v_mount);
752#ifdef NFS_ACDEBUG
753 mtx_lock(&Giant); /* nfs_printf() */
754#endif
755 mtx_lock(&np->n_mtx);
756 /* XXX n_mtime doesn't seem to be updated on a miss-and-reload */
757 timeo = (time_second - np->n_mtime.tv_sec) / 10;
758
759#ifdef NFS_ACDEBUG
760 if (nfs_acdebug>1)
761 nfs_printf("nfs_getattrcache: initial timeo = %d\n", timeo);
762#endif
763
764 if (vap->va_type == VDIR) {
765 if ((np->n_flag & NMODIFIED) || timeo < nmp->nm_acdirmin)
766 timeo = nmp->nm_acdirmin;
767 else if (timeo > nmp->nm_acdirmax)
768 timeo = nmp->nm_acdirmax;
769 } else {
770 if ((np->n_flag & NMODIFIED) || timeo < nmp->nm_acregmin)
771 timeo = nmp->nm_acregmin;
772 else if (timeo > nmp->nm_acregmax)
773 timeo = nmp->nm_acregmax;
774 }
775
776#ifdef NFS_ACDEBUG
777 if (nfs_acdebug > 2)
778 nfs_printf("acregmin %d; acregmax %d; acdirmin %d; acdirmax %d\n",
779 nmp->nm_acregmin, nmp->nm_acregmax,
780 nmp->nm_acdirmin, nmp->nm_acdirmax);
781
782 if (nfs_acdebug)
783 nfs_printf("nfs_getattrcache: age = %d; final timeo = %d\n",
784 (time_second - np->n_attrstamp), timeo);
785#endif
786
787 if ((time_second - np->n_attrstamp) >= timeo) {
788 nfsstats.attrcache_misses++;
789 mtx_unlock(&np->n_mtx);
790 return( ENOENT);
791 }
792 nfsstats.attrcache_hits++;
793 if (vap->va_size != np->n_size) {
794 if (vap->va_type == VREG) {
795 if (np->n_flag & NMODIFIED) {
796 if (vap->va_size < np->n_size)
797 vap->va_size = np->n_size;
798 else
799 np->n_size = vap->va_size;
800 } else {
801 np->n_size = vap->va_size;
802 }
803 vnode_pager_setsize(vp, np->n_size);
804 } else {
805 np->n_size = vap->va_size;
806 }
807 }
808 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(struct vattr));
809 if (np->n_flag & NCHG) {
810 if (np->n_flag & NACC)
811 vaper->va_atime = np->n_atim;
812 if (np->n_flag & NUPD)
813 vaper->va_mtime = np->n_mtim;
814 }
815 mtx_unlock(&np->n_mtx);
816#ifdef NFS_ACDEBUG
817 mtx_unlock(&Giant); /* nfs_printf() */
818#endif
819 return (0);
820}
821
822static nfsuint64 nfs_nullcookie = { { 0, 0 } };
823/*
824 * This function finds the directory cookie that corresponds to the
825 * logical byte offset given.
826 */
827nfsuint64 *
828nfs_getcookie(struct nfsnode *np, off_t off, int add)
829{
830 struct nfsdmap *dp, *dp2;
831 int pos;
832 nfsuint64 *retval = NULL;
833
834 pos = (uoff_t)off / NFS_DIRBLKSIZ;
835 if (pos == 0 || off < 0) {
836#ifdef DIAGNOSTIC
837 if (add)
838 panic("nfs getcookie add at <= 0");
839#endif
840 return (&nfs_nullcookie);
841 }
842 pos--;
843 dp = LIST_FIRST(&np->n_cookies);
844 if (!dp) {
845 if (add) {
846 MALLOC(dp, struct nfsdmap *, sizeof (struct nfsdmap),
847 M_NFSDIROFF, M_WAITOK);
848 dp->ndm_eocookie = 0;
849 LIST_INSERT_HEAD(&np->n_cookies, dp, ndm_list);
850 } else
851 goto out;
852 }
853 while (pos >= NFSNUMCOOKIES) {
854 pos -= NFSNUMCOOKIES;
855 if (LIST_NEXT(dp, ndm_list)) {
856 if (!add && dp->ndm_eocookie < NFSNUMCOOKIES &&
857 pos >= dp->ndm_eocookie)
858 goto out;
859 dp = LIST_NEXT(dp, ndm_list);
860 } else if (add) {
861 MALLOC(dp2, struct nfsdmap *, sizeof (struct nfsdmap),
862 M_NFSDIROFF, M_WAITOK);
863 dp2->ndm_eocookie = 0;
864 LIST_INSERT_AFTER(dp, dp2, ndm_list);
865 dp = dp2;
866 } else
867 goto out;
868 }
869 if (pos >= dp->ndm_eocookie) {
870 if (add)
871 dp->ndm_eocookie = pos + 1;
872 else
873 goto out;
874 }
875 retval = &dp->ndm_cookies[pos];
876out:
877 return (retval);
878}
879
880/*
881 * Invalidate cached directory information, except for the actual directory
882 * blocks (which are invalidated separately).
883 * Done mainly to avoid the use of stale offset cookies.
884 */
885void
886nfs_invaldir(struct vnode *vp)
887{
888 struct nfsnode *np = VTONFS(vp);
889
890#ifdef DIAGNOSTIC
891 if (vp->v_type != VDIR)
892 panic("nfs: invaldir not dir");
893#endif
894 nfs_dircookie_lock(np);
895 np->n_direofoffset = 0;
896 np->n_cookieverf.nfsuquad[0] = 0;
897 np->n_cookieverf.nfsuquad[1] = 0;
898 if (LIST_FIRST(&np->n_cookies))
899 LIST_FIRST(&np->n_cookies)->ndm_eocookie = 0;
900 nfs_dircookie_unlock(np);
901}
902
903/*
904 * The write verifier has changed (probably due to a server reboot), so all
905 * B_NEEDCOMMIT blocks will have to be written again. Since they are on the
906 * dirty block list as B_DELWRI, all this takes is clearing the B_NEEDCOMMIT
907 * and B_CLUSTEROK flags. Once done the new write verifier can be set for the
908 * mount point.
909 *
910 * B_CLUSTEROK must be cleared along with B_NEEDCOMMIT because stage 1 data
911 * writes are not clusterable.
912 */
913void
914nfs_clearcommit(struct mount *mp)
915{
916 struct vnode *vp, *nvp;
917 struct buf *bp, *nbp;
918 int s;
919
920 s = splbio();
921 MNT_ILOCK(mp);
922 MNT_VNODE_FOREACH(vp, mp, nvp) {
923 VI_LOCK(vp);
924 if (vp->v_iflag & VI_DOOMED) {
925 VI_UNLOCK(vp);
926 continue;
927 }
928 MNT_IUNLOCK(mp);
929 TAILQ_FOREACH_SAFE(bp, &vp->v_bufobj.bo_dirty.bv_hd, b_bobufs, nbp) {
930 if (!BUF_ISLOCKED(bp) &&
931 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT))
932 == (B_DELWRI | B_NEEDCOMMIT))
933 bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK);
934 }
935 VI_UNLOCK(vp);
936 MNT_ILOCK(mp);
937 }
938 MNT_IUNLOCK(mp);
939 splx(s);
940}
941
942/*
943 * Helper functions for former macros. Some of these should be
944 * moved to their callers.
945 */
946
947int
948nfsm_mtofh_xx(struct vnode *d, struct vnode **v, int v3, int *f,
949 struct mbuf **md, caddr_t *dpos)
950{
951 struct nfsnode *ttnp;
952 struct vnode *ttvp;
953 nfsfh_t *ttfhp;
954 u_int32_t *tl;
955 int ttfhsize;
956 int t1;
957
958 if (v3) {
959 tl = nfsm_dissect_xx(NFSX_UNSIGNED, md, dpos);
960 if (tl == NULL)
961 return EBADRPC;
962 *f = fxdr_unsigned(int, *tl);
963 } else
964 *f = 1;
965 if (*f) {
966 t1 = nfsm_getfh_xx(&ttfhp, &ttfhsize, (v3), md, dpos);
967 if (t1 != 0)
968 return t1;
969 t1 = nfs_nget(d->v_mount, ttfhp, ttfhsize, &ttnp, LK_EXCLUSIVE);
970 if (t1 != 0)
971 return t1;
972 *v = NFSTOV(ttnp);
973 }
974 if (v3) {
975 tl = nfsm_dissect_xx(NFSX_UNSIGNED, md, dpos);
976 if (tl == NULL)
977 return EBADRPC;
978 if (*f)
979 *f = fxdr_unsigned(int, *tl);
980 else if (fxdr_unsigned(int, *tl))
981 nfsm_adv_xx(NFSX_V3FATTR, md, dpos);
982 }
983 if (*f) {
984 ttvp = *v;
985 t1 = nfs_loadattrcache(&ttvp, md, dpos, NULL, 0);
986 if (t1)
987 return t1;
988 *v = ttvp;
989 }
990 return 0;
991}
992
993int
994nfsm_getfh_xx(nfsfh_t **f, int *s, int v3, struct mbuf **md, caddr_t *dpos)
995{
996 u_int32_t *tl;
997
998 if (v3) {
999 tl = nfsm_dissect_xx(NFSX_UNSIGNED, md, dpos);
1000 if (tl == NULL)
1001 return EBADRPC;
1002 *s = fxdr_unsigned(int, *tl);
1003 if (*s <= 0 || *s > NFSX_V3FHMAX)
1004 return EBADRPC;
1005 } else
1006 *s = NFSX_V2FH;
1007 *f = nfsm_dissect_xx(nfsm_rndup(*s), md, dpos);
1008 if (*f == NULL)
1009 return EBADRPC;
1010 else
1011 return 0;
1012}
1013
1014
1015int
1016nfsm_loadattr_xx(struct vnode **v, struct vattr *va, struct mbuf **md,
1017 caddr_t *dpos)
1018{
1019 int t1;
1020
1021 struct vnode *ttvp = *v;
1022 t1 = nfs_loadattrcache(&ttvp, md, dpos, va, 0);
1023 if (t1 != 0)
1024 return t1;
1025 *v = ttvp;
1026 return 0;
1027}
1028
1029int
1030nfsm_postop_attr_xx(struct vnode **v, int *f, struct mbuf **md,
1031 caddr_t *dpos)
1032{
1033 u_int32_t *tl;
1034 int t1;
1035
1036 struct vnode *ttvp = *v;
1037 tl = nfsm_dissect_xx(NFSX_UNSIGNED, md, dpos);
1038 if (tl == NULL)
1039 return EBADRPC;
1040 *f = fxdr_unsigned(int, *tl);
1041 if (*f != 0) {
1042 t1 = nfs_loadattrcache(&ttvp, md, dpos, NULL, 1);
1043 if (t1 != 0) {
1044 *f = 0;
1045 return t1;
1046 }
1047 *v = ttvp;
1048 }
1049 return 0;
1050}
1051
1052int
1053nfsm_wcc_data_xx(struct vnode **v, int *f, struct mbuf **md, caddr_t *dpos)
1054{
1055 u_int32_t *tl;
1056 int ttattrf, ttretf = 0;
1057 int t1;
1058
1059 tl = nfsm_dissect_xx(NFSX_UNSIGNED, md, dpos);
1060 if (tl == NULL)
1061 return EBADRPC;
1062 if (*tl == nfs_true) {
1063 tl = nfsm_dissect_xx(6 * NFSX_UNSIGNED, md, dpos);
1064 if (tl == NULL)
1065 return EBADRPC;
1066 mtx_lock(&(VTONFS(*v))->n_mtx);
1067 if (*f)
1068 ttretf = (VTONFS(*v)->n_mtime.tv_sec == fxdr_unsigned(u_int32_t, *(tl + 2)) &&
1069 VTONFS(*v)->n_mtime.tv_nsec == fxdr_unsigned(u_int32_t, *(tl + 3)));
1070 mtx_unlock(&(VTONFS(*v))->n_mtx);
1071 }
1072 t1 = nfsm_postop_attr_xx(v, &ttattrf, md, dpos);
1073 if (t1)
1074 return t1;
1075 if (*f)
1076 *f = ttretf;
1077 else
1078 *f = ttattrf;
1079 return 0;
1080}
1081
1082int
1083nfsm_strtom_xx(const char *a, int s, int m, struct mbuf **mb, caddr_t *bpos)
1084{
1085 u_int32_t *tl;
1086 int t1;
1087
1088 if (s > m)
1089 return ENAMETOOLONG;
1090 t1 = nfsm_rndup(s) + NFSX_UNSIGNED;
1091 if (t1 <= M_TRAILINGSPACE(*mb)) {
1092 tl = nfsm_build_xx(t1, mb, bpos);
1093 *tl++ = txdr_unsigned(s);
1094 *(tl + ((t1 >> 2) - 2)) = 0;
1095 bcopy(a, tl, s);
1096 } else {
1097 t1 = nfsm_strtmbuf(mb, bpos, a, s);
1098 if (t1 != 0)
1099 return t1;
1100 }
1101 return 0;
1102}
1103
1104int
1105nfsm_fhtom_xx(struct vnode *v, int v3, struct mbuf **mb, caddr_t *bpos)
1106{
1107 u_int32_t *tl;
1108 int t1;
1109 caddr_t cp;
1110
1111 if (v3) {
1112 t1 = nfsm_rndup(VTONFS(v)->n_fhsize) + NFSX_UNSIGNED;
1113 if (t1 < M_TRAILINGSPACE(*mb)) {
1114 tl = nfsm_build_xx(t1, mb, bpos);
1115 *tl++ = txdr_unsigned(VTONFS(v)->n_fhsize);
1116 *(tl + ((t1 >> 2) - 2)) = 0;
1117 bcopy(VTONFS(v)->n_fhp, tl, VTONFS(v)->n_fhsize);
1118 } else {
1119 t1 = nfsm_strtmbuf(mb, bpos,
1120 (const char *)VTONFS(v)->n_fhp,
1121 VTONFS(v)->n_fhsize);
1122 if (t1 != 0)
1123 return t1;
1124 }
1125 } else {
1126 cp = nfsm_build_xx(NFSX_V2FH, mb, bpos);
1127 bcopy(VTONFS(v)->n_fhp, cp, NFSX_V2FH);
1128 }
1129 return 0;
1130}
1131
1132void
1133nfsm_v3attrbuild_xx(struct vattr *va, int full, struct mbuf **mb,
1134 caddr_t *bpos)
1135{
1136 u_int32_t *tl;
1137
1138 if (va->va_mode != (mode_t)VNOVAL) {
1139 tl = nfsm_build_xx(2 * NFSX_UNSIGNED, mb, bpos);
1140 *tl++ = nfs_true;
1141 *tl = txdr_unsigned(va->va_mode);
1142 } else {
1143 tl = nfsm_build_xx(NFSX_UNSIGNED, mb, bpos);
1144 *tl = nfs_false;
1145 }
1146 if (full && va->va_uid != (uid_t)VNOVAL) {
1147 tl = nfsm_build_xx(2 * NFSX_UNSIGNED, mb, bpos);
1148 *tl++ = nfs_true;
1149 *tl = txdr_unsigned(va->va_uid);
1150 } else {
1151 tl = nfsm_build_xx(NFSX_UNSIGNED, mb, bpos);
1152 *tl = nfs_false;
1153 }
1154 if (full && va->va_gid != (gid_t)VNOVAL) {
1155 tl = nfsm_build_xx(2 * NFSX_UNSIGNED, mb, bpos);
1156 *tl++ = nfs_true;
1157 *tl = txdr_unsigned(va->va_gid);
1158 } else {
1159 tl = nfsm_build_xx(NFSX_UNSIGNED, mb, bpos);
1160 *tl = nfs_false;
1161 }
1162 if (full && va->va_size != VNOVAL) {
1163 tl = nfsm_build_xx(3 * NFSX_UNSIGNED, mb, bpos);
1164 *tl++ = nfs_true;
1165 txdr_hyper(va->va_size, tl);
1166 } else {
1167 tl = nfsm_build_xx(NFSX_UNSIGNED, mb, bpos);
1168 *tl = nfs_false;
1169 }
1170 if (va->va_atime.tv_sec != VNOVAL) {
1171 if (va->va_atime.tv_sec != time_second) {
1172 tl = nfsm_build_xx(3 * NFSX_UNSIGNED, mb, bpos);
1173 *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT);
1174 txdr_nfsv3time(&va->va_atime, tl);
1175 } else {
1176 tl = nfsm_build_xx(NFSX_UNSIGNED, mb, bpos);
1177 *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER);
1178 }
1179 } else {
1180 tl = nfsm_build_xx(NFSX_UNSIGNED, mb, bpos);
1181 *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE);
1182 }
1183 if (va->va_mtime.tv_sec != VNOVAL) {
1184 if (va->va_mtime.tv_sec != time_second) {
1185 tl = nfsm_build_xx(3 * NFSX_UNSIGNED, mb, bpos);
1186 *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT);
1187 txdr_nfsv3time(&va->va_mtime, tl);
1188 } else {
1189 tl = nfsm_build_xx(NFSX_UNSIGNED, mb, bpos);
1190 *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER);
1191 }
1192 } else {
1193 tl = nfsm_build_xx(NFSX_UNSIGNED, mb, bpos);
1194 *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE);
1195 }
1196}
| 497 if (old_lock == LK_SHARED) {
498 /* Upgrade to exclusive lock, this might block */
499 vn_lock(vp, LK_UPGRADE | LK_RETRY);
500 } else {
501 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
502 }
503 }
504 return old_lock;
505}
506
507void
508nfs_downgrade_vnlock(struct vnode *vp, int old_lock)
509{
510 if (old_lock != LK_EXCLUSIVE) {
511 if (old_lock == LK_SHARED) {
512 /* Downgrade from exclusive lock, this might block */
513 vn_lock(vp, LK_DOWNGRADE);
514 } else {
515 VOP_UNLOCK(vp, 0);
516 }
517 }
518}
519
520void
521nfs_printf(const char *fmt, ...)
522{
523 va_list ap;
524
525 mtx_lock(&Giant);
526 va_start(ap, fmt);
527 printf(fmt, ap);
528 va_end(ap);
529 mtx_unlock(&Giant);
530}
531
532/*
533 * Attribute cache routines.
534 * nfs_loadattrcache() - loads or updates the cache contents from attributes
535 * that are on the mbuf list
536 * nfs_getattrcache() - returns valid attributes if found in cache, returns
537 * error otherwise
538 */
539
540/*
541 * Load the attribute cache (that lives in the nfsnode entry) with
542 * the values on the mbuf list and
543 * Iff vap not NULL
544 * copy the attributes to *vaper
545 */
546int
547nfs_loadattrcache(struct vnode **vpp, struct mbuf **mdp, caddr_t *dposp,
548 struct vattr *vaper, int dontshrink)
549{
550 struct vnode *vp = *vpp;
551 struct vattr *vap;
552 struct nfs_fattr *fp;
553 struct nfsnode *np;
554 int32_t t1;
555 caddr_t cp2;
556 int rdev;
557 struct mbuf *md;
558 enum vtype vtyp;
559 u_short vmode;
560 struct timespec mtime, mtime_save;
561 int v3 = NFS_ISV3(vp);
562 struct thread *td = curthread;
563
564 md = *mdp;
565 t1 = (mtod(md, caddr_t) + md->m_len) - *dposp;
566 cp2 = nfsm_disct(mdp, dposp, NFSX_FATTR(v3), t1, M_TRYWAIT);
567 if (cp2 == NULL)
568 return EBADRPC;
569 fp = (struct nfs_fattr *)cp2;
570 if (v3) {
571 vtyp = nfsv3tov_type(fp->fa_type);
572 vmode = fxdr_unsigned(u_short, fp->fa_mode);
573 rdev = makedev(fxdr_unsigned(int, fp->fa3_rdev.specdata1),
574 fxdr_unsigned(int, fp->fa3_rdev.specdata2));
575 fxdr_nfsv3time(&fp->fa3_mtime, &mtime);
576 } else {
577 vtyp = nfsv2tov_type(fp->fa_type);
578 vmode = fxdr_unsigned(u_short, fp->fa_mode);
579 /*
580 * XXX
581 *
582 * The duplicate information returned in fa_type and fa_mode
583 * is an ambiguity in the NFS version 2 protocol.
584 *
585 * VREG should be taken literally as a regular file. If a
586 * server intents to return some type information differently
587 * in the upper bits of the mode field (e.g. for sockets, or
588 * FIFOs), NFSv2 mandates fa_type to be VNON. Anyway, we
589 * leave the examination of the mode bits even in the VREG
590 * case to avoid breakage for bogus servers, but we make sure
591 * that there are actually type bits set in the upper part of
592 * fa_mode (and failing that, trust the va_type field).
593 *
594 * NFSv3 cleared the issue, and requires fa_mode to not
595 * contain any type information (while also introduing sockets
596 * and FIFOs for fa_type).
597 */
598 if (vtyp == VNON || (vtyp == VREG && (vmode & S_IFMT) != 0))
599 vtyp = IFTOVT(vmode);
600 rdev = fxdr_unsigned(int32_t, fp->fa2_rdev);
601 fxdr_nfsv2time(&fp->fa2_mtime, &mtime);
602
603 /*
604 * Really ugly NFSv2 kludge.
605 */
606 if (vtyp == VCHR && rdev == 0xffffffff)
607 vtyp = VFIFO;
608 }
609
610 /*
611 * If v_type == VNON it is a new node, so fill in the v_type,
612 * n_mtime fields. Check to see if it represents a special
613 * device, and if so, check for a possible alias. Once the
614 * correct vnode has been obtained, fill in the rest of the
615 * information.
616 */
617 np = VTONFS(vp);
618 mtx_lock(&np->n_mtx);
619 if (vp->v_type != vtyp) {
620 vp->v_type = vtyp;
621 if (vp->v_type == VFIFO)
622 vp->v_op = &nfs_fifoops;
623 np->n_mtime = mtime;
624 }
625 vap = &np->n_vattr;
626 vap->va_type = vtyp;
627 vap->va_mode = (vmode & 07777);
628 vap->va_rdev = rdev;
629 mtime_save = vap->va_mtime;
630 vap->va_mtime = mtime;
631 vap->va_fsid = vp->v_mount->mnt_stat.f_fsid.val[0];
632 if (v3) {
633 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink);
634 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid);
635 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid);
636 vap->va_size = fxdr_hyper(&fp->fa3_size);
637 vap->va_blocksize = NFS_FABLKSIZE;
638 vap->va_bytes = fxdr_hyper(&fp->fa3_used);
639 vap->va_fileid = fxdr_unsigned(int32_t,
640 fp->fa3_fileid.nfsuquad[1]);
641 fxdr_nfsv3time(&fp->fa3_atime, &vap->va_atime);
642 fxdr_nfsv3time(&fp->fa3_ctime, &vap->va_ctime);
643 vap->va_flags = 0;
644 vap->va_filerev = 0;
645 } else {
646 vap->va_nlink = fxdr_unsigned(u_short, fp->fa_nlink);
647 vap->va_uid = fxdr_unsigned(uid_t, fp->fa_uid);
648 vap->va_gid = fxdr_unsigned(gid_t, fp->fa_gid);
649 vap->va_size = fxdr_unsigned(u_int32_t, fp->fa2_size);
650 vap->va_blocksize = fxdr_unsigned(int32_t, fp->fa2_blocksize);
651 vap->va_bytes = (u_quad_t)fxdr_unsigned(int32_t, fp->fa2_blocks)
652 * NFS_FABLKSIZE;
653 vap->va_fileid = fxdr_unsigned(int32_t, fp->fa2_fileid);
654 fxdr_nfsv2time(&fp->fa2_atime, &vap->va_atime);
655 vap->va_flags = 0;
656 vap->va_ctime.tv_sec = fxdr_unsigned(u_int32_t,
657 fp->fa2_ctime.nfsv2_sec);
658 vap->va_ctime.tv_nsec = 0;
659 vap->va_gen = fxdr_unsigned(u_int32_t, fp->fa2_ctime.nfsv2_usec);
660 vap->va_filerev = 0;
661 }
662 np->n_attrstamp = time_second;
663 /* Timestamp the NFS otw getattr fetch */
664 if (td->td_proc) {
665 np->n_ac_ts_tid = td->td_tid;
666 np->n_ac_ts_pid = td->td_proc->p_pid;
667 np->n_ac_ts_syscalls = td->td_syscalls;
668 } else
669 bzero(&np->n_ac_ts, sizeof(struct nfs_attrcache_timestamp));
670
671 if (vap->va_size != np->n_size) {
672 if (vap->va_type == VREG) {
673 if (dontshrink && vap->va_size < np->n_size) {
674 /*
675 * We've been told not to shrink the file;
676 * zero np->n_attrstamp to indicate that
677 * the attributes are stale.
678 */
679 vap->va_size = np->n_size;
680 np->n_attrstamp = 0;
681 } else if (np->n_flag & NMODIFIED) {
682 /*
683 * We've modified the file: Use the larger
684 * of our size, and the server's size.
685 */
686 if (vap->va_size < np->n_size) {
687 vap->va_size = np->n_size;
688 } else {
689 np->n_size = vap->va_size;
690 np->n_flag |= NSIZECHANGED;
691 }
692 } else {
693 np->n_size = vap->va_size;
694 np->n_flag |= NSIZECHANGED;
695 }
696 vnode_pager_setsize(vp, np->n_size);
697 } else {
698 np->n_size = vap->va_size;
699 }
700 }
701 /*
702 * The following checks are added to prevent a race between (say)
703 * a READDIR+ and a WRITE.
704 * READDIR+, WRITE requests sent out.
705 * READDIR+ resp, WRITE resp received on client.
706 * However, the WRITE resp was handled before the READDIR+ resp
707 * causing the post op attrs from the write to be loaded first
708 * and the attrs from the READDIR+ to be loaded later. If this
709 * happens, we have stale attrs loaded into the attrcache.
710 * We detect this by for the mtime moving back. We invalidate the
711 * attrcache when this happens.
712 */
713 if (timespeccmp(&mtime_save, &vap->va_mtime, >))
714 /* Size changed or mtime went backwards */
715 np->n_attrstamp = 0;
716 if (vaper != NULL) {
717 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(*vap));
718 if (np->n_flag & NCHG) {
719 if (np->n_flag & NACC)
720 vaper->va_atime = np->n_atim;
721 if (np->n_flag & NUPD)
722 vaper->va_mtime = np->n_mtim;
723 }
724 }
725 mtx_unlock(&np->n_mtx);
726 return (0);
727}
728
729#ifdef NFS_ACDEBUG
730#include <sys/sysctl.h>
731SYSCTL_DECL(_vfs_nfs);
732static int nfs_acdebug;
733SYSCTL_INT(_vfs_nfs, OID_AUTO, acdebug, CTLFLAG_RW, &nfs_acdebug, 0, "");
734#endif
735
736/*
737 * Check the time stamp
738 * If the cache is valid, copy contents to *vap and return 0
739 * otherwise return an error
740 */
741int
742nfs_getattrcache(struct vnode *vp, struct vattr *vaper)
743{
744 struct nfsnode *np;
745 struct vattr *vap;
746 struct nfsmount *nmp;
747 int timeo;
748
749 np = VTONFS(vp);
750 vap = &np->n_vattr;
751 nmp = VFSTONFS(vp->v_mount);
752#ifdef NFS_ACDEBUG
753 mtx_lock(&Giant); /* nfs_printf() */
754#endif
755 mtx_lock(&np->n_mtx);
756 /* XXX n_mtime doesn't seem to be updated on a miss-and-reload */
757 timeo = (time_second - np->n_mtime.tv_sec) / 10;
758
759#ifdef NFS_ACDEBUG
760 if (nfs_acdebug>1)
761 nfs_printf("nfs_getattrcache: initial timeo = %d\n", timeo);
762#endif
763
764 if (vap->va_type == VDIR) {
765 if ((np->n_flag & NMODIFIED) || timeo < nmp->nm_acdirmin)
766 timeo = nmp->nm_acdirmin;
767 else if (timeo > nmp->nm_acdirmax)
768 timeo = nmp->nm_acdirmax;
769 } else {
770 if ((np->n_flag & NMODIFIED) || timeo < nmp->nm_acregmin)
771 timeo = nmp->nm_acregmin;
772 else if (timeo > nmp->nm_acregmax)
773 timeo = nmp->nm_acregmax;
774 }
775
776#ifdef NFS_ACDEBUG
777 if (nfs_acdebug > 2)
778 nfs_printf("acregmin %d; acregmax %d; acdirmin %d; acdirmax %d\n",
779 nmp->nm_acregmin, nmp->nm_acregmax,
780 nmp->nm_acdirmin, nmp->nm_acdirmax);
781
782 if (nfs_acdebug)
783 nfs_printf("nfs_getattrcache: age = %d; final timeo = %d\n",
784 (time_second - np->n_attrstamp), timeo);
785#endif
786
787 if ((time_second - np->n_attrstamp) >= timeo) {
788 nfsstats.attrcache_misses++;
789 mtx_unlock(&np->n_mtx);
790 return( ENOENT);
791 }
792 nfsstats.attrcache_hits++;
793 if (vap->va_size != np->n_size) {
794 if (vap->va_type == VREG) {
795 if (np->n_flag & NMODIFIED) {
796 if (vap->va_size < np->n_size)
797 vap->va_size = np->n_size;
798 else
799 np->n_size = vap->va_size;
800 } else {
801 np->n_size = vap->va_size;
802 }
803 vnode_pager_setsize(vp, np->n_size);
804 } else {
805 np->n_size = vap->va_size;
806 }
807 }
808 bcopy((caddr_t)vap, (caddr_t)vaper, sizeof(struct vattr));
809 if (np->n_flag & NCHG) {
810 if (np->n_flag & NACC)
811 vaper->va_atime = np->n_atim;
812 if (np->n_flag & NUPD)
813 vaper->va_mtime = np->n_mtim;
814 }
815 mtx_unlock(&np->n_mtx);
816#ifdef NFS_ACDEBUG
817 mtx_unlock(&Giant); /* nfs_printf() */
818#endif
819 return (0);
820}
821
822static nfsuint64 nfs_nullcookie = { { 0, 0 } };
823/*
824 * This function finds the directory cookie that corresponds to the
825 * logical byte offset given.
826 */
827nfsuint64 *
828nfs_getcookie(struct nfsnode *np, off_t off, int add)
829{
830 struct nfsdmap *dp, *dp2;
831 int pos;
832 nfsuint64 *retval = NULL;
833
834 pos = (uoff_t)off / NFS_DIRBLKSIZ;
835 if (pos == 0 || off < 0) {
836#ifdef DIAGNOSTIC
837 if (add)
838 panic("nfs getcookie add at <= 0");
839#endif
840 return (&nfs_nullcookie);
841 }
842 pos--;
843 dp = LIST_FIRST(&np->n_cookies);
844 if (!dp) {
845 if (add) {
846 MALLOC(dp, struct nfsdmap *, sizeof (struct nfsdmap),
847 M_NFSDIROFF, M_WAITOK);
848 dp->ndm_eocookie = 0;
849 LIST_INSERT_HEAD(&np->n_cookies, dp, ndm_list);
850 } else
851 goto out;
852 }
853 while (pos >= NFSNUMCOOKIES) {
854 pos -= NFSNUMCOOKIES;
855 if (LIST_NEXT(dp, ndm_list)) {
856 if (!add && dp->ndm_eocookie < NFSNUMCOOKIES &&
857 pos >= dp->ndm_eocookie)
858 goto out;
859 dp = LIST_NEXT(dp, ndm_list);
860 } else if (add) {
861 MALLOC(dp2, struct nfsdmap *, sizeof (struct nfsdmap),
862 M_NFSDIROFF, M_WAITOK);
863 dp2->ndm_eocookie = 0;
864 LIST_INSERT_AFTER(dp, dp2, ndm_list);
865 dp = dp2;
866 } else
867 goto out;
868 }
869 if (pos >= dp->ndm_eocookie) {
870 if (add)
871 dp->ndm_eocookie = pos + 1;
872 else
873 goto out;
874 }
875 retval = &dp->ndm_cookies[pos];
876out:
877 return (retval);
878}
879
880/*
881 * Invalidate cached directory information, except for the actual directory
882 * blocks (which are invalidated separately).
883 * Done mainly to avoid the use of stale offset cookies.
884 */
885void
886nfs_invaldir(struct vnode *vp)
887{
888 struct nfsnode *np = VTONFS(vp);
889
890#ifdef DIAGNOSTIC
891 if (vp->v_type != VDIR)
892 panic("nfs: invaldir not dir");
893#endif
894 nfs_dircookie_lock(np);
895 np->n_direofoffset = 0;
896 np->n_cookieverf.nfsuquad[0] = 0;
897 np->n_cookieverf.nfsuquad[1] = 0;
898 if (LIST_FIRST(&np->n_cookies))
899 LIST_FIRST(&np->n_cookies)->ndm_eocookie = 0;
900 nfs_dircookie_unlock(np);
901}
902
903/*
904 * The write verifier has changed (probably due to a server reboot), so all
905 * B_NEEDCOMMIT blocks will have to be written again. Since they are on the
906 * dirty block list as B_DELWRI, all this takes is clearing the B_NEEDCOMMIT
907 * and B_CLUSTEROK flags. Once done the new write verifier can be set for the
908 * mount point.
909 *
910 * B_CLUSTEROK must be cleared along with B_NEEDCOMMIT because stage 1 data
911 * writes are not clusterable.
912 */
913void
914nfs_clearcommit(struct mount *mp)
915{
916 struct vnode *vp, *nvp;
917 struct buf *bp, *nbp;
918 int s;
919
920 s = splbio();
921 MNT_ILOCK(mp);
922 MNT_VNODE_FOREACH(vp, mp, nvp) {
923 VI_LOCK(vp);
924 if (vp->v_iflag & VI_DOOMED) {
925 VI_UNLOCK(vp);
926 continue;
927 }
928 MNT_IUNLOCK(mp);
929 TAILQ_FOREACH_SAFE(bp, &vp->v_bufobj.bo_dirty.bv_hd, b_bobufs, nbp) {
930 if (!BUF_ISLOCKED(bp) &&
931 (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT))
932 == (B_DELWRI | B_NEEDCOMMIT))
933 bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK);
934 }
935 VI_UNLOCK(vp);
936 MNT_ILOCK(mp);
937 }
938 MNT_IUNLOCK(mp);
939 splx(s);
940}
941
942/*
943 * Helper functions for former macros. Some of these should be
944 * moved to their callers.
945 */
946
947int
948nfsm_mtofh_xx(struct vnode *d, struct vnode **v, int v3, int *f,
949 struct mbuf **md, caddr_t *dpos)
950{
951 struct nfsnode *ttnp;
952 struct vnode *ttvp;
953 nfsfh_t *ttfhp;
954 u_int32_t *tl;
955 int ttfhsize;
956 int t1;
957
958 if (v3) {
959 tl = nfsm_dissect_xx(NFSX_UNSIGNED, md, dpos);
960 if (tl == NULL)
961 return EBADRPC;
962 *f = fxdr_unsigned(int, *tl);
963 } else
964 *f = 1;
965 if (*f) {
966 t1 = nfsm_getfh_xx(&ttfhp, &ttfhsize, (v3), md, dpos);
967 if (t1 != 0)
968 return t1;
969 t1 = nfs_nget(d->v_mount, ttfhp, ttfhsize, &ttnp, LK_EXCLUSIVE);
970 if (t1 != 0)
971 return t1;
972 *v = NFSTOV(ttnp);
973 }
974 if (v3) {
975 tl = nfsm_dissect_xx(NFSX_UNSIGNED, md, dpos);
976 if (tl == NULL)
977 return EBADRPC;
978 if (*f)
979 *f = fxdr_unsigned(int, *tl);
980 else if (fxdr_unsigned(int, *tl))
981 nfsm_adv_xx(NFSX_V3FATTR, md, dpos);
982 }
983 if (*f) {
984 ttvp = *v;
985 t1 = nfs_loadattrcache(&ttvp, md, dpos, NULL, 0);
986 if (t1)
987 return t1;
988 *v = ttvp;
989 }
990 return 0;
991}
992
993int
994nfsm_getfh_xx(nfsfh_t **f, int *s, int v3, struct mbuf **md, caddr_t *dpos)
995{
996 u_int32_t *tl;
997
998 if (v3) {
999 tl = nfsm_dissect_xx(NFSX_UNSIGNED, md, dpos);
1000 if (tl == NULL)
1001 return EBADRPC;
1002 *s = fxdr_unsigned(int, *tl);
1003 if (*s <= 0 || *s > NFSX_V3FHMAX)
1004 return EBADRPC;
1005 } else
1006 *s = NFSX_V2FH;
1007 *f = nfsm_dissect_xx(nfsm_rndup(*s), md, dpos);
1008 if (*f == NULL)
1009 return EBADRPC;
1010 else
1011 return 0;
1012}
1013
1014
1015int
1016nfsm_loadattr_xx(struct vnode **v, struct vattr *va, struct mbuf **md,
1017 caddr_t *dpos)
1018{
1019 int t1;
1020
1021 struct vnode *ttvp = *v;
1022 t1 = nfs_loadattrcache(&ttvp, md, dpos, va, 0);
1023 if (t1 != 0)
1024 return t1;
1025 *v = ttvp;
1026 return 0;
1027}
1028
1029int
1030nfsm_postop_attr_xx(struct vnode **v, int *f, struct mbuf **md,
1031 caddr_t *dpos)
1032{
1033 u_int32_t *tl;
1034 int t1;
1035
1036 struct vnode *ttvp = *v;
1037 tl = nfsm_dissect_xx(NFSX_UNSIGNED, md, dpos);
1038 if (tl == NULL)
1039 return EBADRPC;
1040 *f = fxdr_unsigned(int, *tl);
1041 if (*f != 0) {
1042 t1 = nfs_loadattrcache(&ttvp, md, dpos, NULL, 1);
1043 if (t1 != 0) {
1044 *f = 0;
1045 return t1;
1046 }
1047 *v = ttvp;
1048 }
1049 return 0;
1050}
1051
1052int
1053nfsm_wcc_data_xx(struct vnode **v, int *f, struct mbuf **md, caddr_t *dpos)
1054{
1055 u_int32_t *tl;
1056 int ttattrf, ttretf = 0;
1057 int t1;
1058
1059 tl = nfsm_dissect_xx(NFSX_UNSIGNED, md, dpos);
1060 if (tl == NULL)
1061 return EBADRPC;
1062 if (*tl == nfs_true) {
1063 tl = nfsm_dissect_xx(6 * NFSX_UNSIGNED, md, dpos);
1064 if (tl == NULL)
1065 return EBADRPC;
1066 mtx_lock(&(VTONFS(*v))->n_mtx);
1067 if (*f)
1068 ttretf = (VTONFS(*v)->n_mtime.tv_sec == fxdr_unsigned(u_int32_t, *(tl + 2)) &&
1069 VTONFS(*v)->n_mtime.tv_nsec == fxdr_unsigned(u_int32_t, *(tl + 3)));
1070 mtx_unlock(&(VTONFS(*v))->n_mtx);
1071 }
1072 t1 = nfsm_postop_attr_xx(v, &ttattrf, md, dpos);
1073 if (t1)
1074 return t1;
1075 if (*f)
1076 *f = ttretf;
1077 else
1078 *f = ttattrf;
1079 return 0;
1080}
1081
1082int
1083nfsm_strtom_xx(const char *a, int s, int m, struct mbuf **mb, caddr_t *bpos)
1084{
1085 u_int32_t *tl;
1086 int t1;
1087
1088 if (s > m)
1089 return ENAMETOOLONG;
1090 t1 = nfsm_rndup(s) + NFSX_UNSIGNED;
1091 if (t1 <= M_TRAILINGSPACE(*mb)) {
1092 tl = nfsm_build_xx(t1, mb, bpos);
1093 *tl++ = txdr_unsigned(s);
1094 *(tl + ((t1 >> 2) - 2)) = 0;
1095 bcopy(a, tl, s);
1096 } else {
1097 t1 = nfsm_strtmbuf(mb, bpos, a, s);
1098 if (t1 != 0)
1099 return t1;
1100 }
1101 return 0;
1102}
1103
1104int
1105nfsm_fhtom_xx(struct vnode *v, int v3, struct mbuf **mb, caddr_t *bpos)
1106{
1107 u_int32_t *tl;
1108 int t1;
1109 caddr_t cp;
1110
1111 if (v3) {
1112 t1 = nfsm_rndup(VTONFS(v)->n_fhsize) + NFSX_UNSIGNED;
1113 if (t1 < M_TRAILINGSPACE(*mb)) {
1114 tl = nfsm_build_xx(t1, mb, bpos);
1115 *tl++ = txdr_unsigned(VTONFS(v)->n_fhsize);
1116 *(tl + ((t1 >> 2) - 2)) = 0;
1117 bcopy(VTONFS(v)->n_fhp, tl, VTONFS(v)->n_fhsize);
1118 } else {
1119 t1 = nfsm_strtmbuf(mb, bpos,
1120 (const char *)VTONFS(v)->n_fhp,
1121 VTONFS(v)->n_fhsize);
1122 if (t1 != 0)
1123 return t1;
1124 }
1125 } else {
1126 cp = nfsm_build_xx(NFSX_V2FH, mb, bpos);
1127 bcopy(VTONFS(v)->n_fhp, cp, NFSX_V2FH);
1128 }
1129 return 0;
1130}
1131
1132void
1133nfsm_v3attrbuild_xx(struct vattr *va, int full, struct mbuf **mb,
1134 caddr_t *bpos)
1135{
1136 u_int32_t *tl;
1137
1138 if (va->va_mode != (mode_t)VNOVAL) {
1139 tl = nfsm_build_xx(2 * NFSX_UNSIGNED, mb, bpos);
1140 *tl++ = nfs_true;
1141 *tl = txdr_unsigned(va->va_mode);
1142 } else {
1143 tl = nfsm_build_xx(NFSX_UNSIGNED, mb, bpos);
1144 *tl = nfs_false;
1145 }
1146 if (full && va->va_uid != (uid_t)VNOVAL) {
1147 tl = nfsm_build_xx(2 * NFSX_UNSIGNED, mb, bpos);
1148 *tl++ = nfs_true;
1149 *tl = txdr_unsigned(va->va_uid);
1150 } else {
1151 tl = nfsm_build_xx(NFSX_UNSIGNED, mb, bpos);
1152 *tl = nfs_false;
1153 }
1154 if (full && va->va_gid != (gid_t)VNOVAL) {
1155 tl = nfsm_build_xx(2 * NFSX_UNSIGNED, mb, bpos);
1156 *tl++ = nfs_true;
1157 *tl = txdr_unsigned(va->va_gid);
1158 } else {
1159 tl = nfsm_build_xx(NFSX_UNSIGNED, mb, bpos);
1160 *tl = nfs_false;
1161 }
1162 if (full && va->va_size != VNOVAL) {
1163 tl = nfsm_build_xx(3 * NFSX_UNSIGNED, mb, bpos);
1164 *tl++ = nfs_true;
1165 txdr_hyper(va->va_size, tl);
1166 } else {
1167 tl = nfsm_build_xx(NFSX_UNSIGNED, mb, bpos);
1168 *tl = nfs_false;
1169 }
1170 if (va->va_atime.tv_sec != VNOVAL) {
1171 if (va->va_atime.tv_sec != time_second) {
1172 tl = nfsm_build_xx(3 * NFSX_UNSIGNED, mb, bpos);
1173 *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT);
1174 txdr_nfsv3time(&va->va_atime, tl);
1175 } else {
1176 tl = nfsm_build_xx(NFSX_UNSIGNED, mb, bpos);
1177 *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER);
1178 }
1179 } else {
1180 tl = nfsm_build_xx(NFSX_UNSIGNED, mb, bpos);
1181 *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE);
1182 }
1183 if (va->va_mtime.tv_sec != VNOVAL) {
1184 if (va->va_mtime.tv_sec != time_second) {
1185 tl = nfsm_build_xx(3 * NFSX_UNSIGNED, mb, bpos);
1186 *tl++ = txdr_unsigned(NFSV3SATTRTIME_TOCLIENT);
1187 txdr_nfsv3time(&va->va_mtime, tl);
1188 } else {
1189 tl = nfsm_build_xx(NFSX_UNSIGNED, mb, bpos);
1190 *tl = txdr_unsigned(NFSV3SATTRTIME_TOSERVER);
1191 }
1192 } else {
1193 tl = nfsm_build_xx(NFSX_UNSIGNED, mb, bpos);
1194 *tl = txdr_unsigned(NFSV3SATTRTIME_DONTCHANGE);
1195 }
1196}
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