Commit | Line | Data |
---|---|---|
984263bc MD |
1 | /* |
2 | * Copyright (c) 1989, 1993 | |
3 | * The Regents of the University of California. All rights reserved. | |
4 | * | |
5 | * This code is derived from software contributed to Berkeley by | |
6 | * Rick Macklem at The University of Guelph. | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * 1. Redistributions of source code must retain the above copyright | |
12 | * notice, this list of conditions and the following disclaimer. | |
13 | * 2. Redistributions in binary form must reproduce the above copyright | |
14 | * notice, this list of conditions and the following disclaimer in the | |
15 | * documentation and/or other materials provided with the distribution. | |
16 | * 3. All advertising materials mentioning features or use of this software | |
17 | * must display the following acknowledgement: | |
18 | * This product includes software developed by the University of | |
19 | * California, Berkeley and its contributors. | |
20 | * 4. Neither the name of the University nor the names of its contributors | |
21 | * may be used to endorse or promote products derived from this software | |
22 | * without specific prior written permission. | |
23 | * | |
24 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
25 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
29 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
30 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
31 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
32 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
33 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
34 | * SUCH DAMAGE. | |
35 | * | |
36 | * @(#)nfs_vnops.c 8.16 (Berkeley) 5/27/95 | |
37 | * $FreeBSD: src/sys/nfs/nfs_vnops.c,v 1.150.2.5 2001/12/20 19:56:28 dillon Exp $ | |
bb7bf7b2 | 38 | * $DragonFly: src/sys/vfs/nfs/nfs_vnops.c,v 1.80 2008/10/18 01:13:54 dillon Exp $ |
984263bc MD |
39 | */ |
40 | ||
41 | ||
42 | /* | |
43 | * vnode op calls for Sun NFS version 2 and 3 | |
44 | */ | |
45 | ||
46 | #include "opt_inet.h" | |
47 | ||
48 | #include <sys/param.h> | |
49 | #include <sys/kernel.h> | |
50 | #include <sys/systm.h> | |
51 | #include <sys/resourcevar.h> | |
52 | #include <sys/proc.h> | |
53 | #include <sys/mount.h> | |
54 | #include <sys/buf.h> | |
55 | #include <sys/malloc.h> | |
56 | #include <sys/mbuf.h> | |
57 | #include <sys/namei.h> | |
fad57d0e | 58 | #include <sys/nlookup.h> |
984263bc MD |
59 | #include <sys/socket.h> |
60 | #include <sys/vnode.h> | |
61 | #include <sys/dirent.h> | |
62 | #include <sys/fcntl.h> | |
63 | #include <sys/lockf.h> | |
64 | #include <sys/stat.h> | |
65 | #include <sys/sysctl.h> | |
66 | #include <sys/conf.h> | |
67 | ||
68 | #include <vm/vm.h> | |
69 | #include <vm/vm_extern.h> | |
70 | #include <vm/vm_zone.h> | |
71 | ||
3020e3be MD |
72 | #include <sys/buf2.h> |
73 | ||
1f2de5d4 | 74 | #include <vfs/fifofs/fifo.h> |
01f31ab3 JS |
75 | #include <vfs/ufs/dir.h> |
76 | ||
77 | #undef DIRBLKSIZ | |
984263bc | 78 | |
1f2de5d4 MD |
79 | #include "rpcv2.h" |
80 | #include "nfsproto.h" | |
81 | #include "nfs.h" | |
1f2de5d4 | 82 | #include "nfsmount.h" |
c1cf1e59 | 83 | #include "nfsnode.h" |
1f2de5d4 MD |
84 | #include "xdr_subs.h" |
85 | #include "nfsm_subs.h" | |
984263bc MD |
86 | |
87 | #include <net/if.h> | |
88 | #include <netinet/in.h> | |
89 | #include <netinet/in_var.h> | |
90 | ||
165dba55 DR |
91 | #include <sys/thread2.h> |
92 | ||
984263bc MD |
93 | /* Defs */ |
94 | #define TRUE 1 | |
95 | #define FALSE 0 | |
96 | ||
a6ee311a RG |
97 | static int nfsspec_read (struct vop_read_args *); |
98 | static int nfsspec_write (struct vop_write_args *); | |
99 | static int nfsfifo_read (struct vop_read_args *); | |
100 | static int nfsfifo_write (struct vop_write_args *); | |
101 | static int nfsspec_close (struct vop_close_args *); | |
102 | static int nfsfifo_close (struct vop_close_args *); | |
984263bc | 103 | #define nfs_poll vop_nopoll |
a6ee311a | 104 | static int nfs_setattrrpc (struct vnode *,struct vattr *,struct ucred *,struct thread *); |
e62afb5f MD |
105 | static int nfs_lookup (struct vop_old_lookup_args *); |
106 | static int nfs_create (struct vop_old_create_args *); | |
107 | static int nfs_mknod (struct vop_old_mknod_args *); | |
a6ee311a RG |
108 | static int nfs_open (struct vop_open_args *); |
109 | static int nfs_close (struct vop_close_args *); | |
110 | static int nfs_access (struct vop_access_args *); | |
111 | static int nfs_getattr (struct vop_getattr_args *); | |
112 | static int nfs_setattr (struct vop_setattr_args *); | |
113 | static int nfs_read (struct vop_read_args *); | |
114 | static int nfs_mmap (struct vop_mmap_args *); | |
115 | static int nfs_fsync (struct vop_fsync_args *); | |
e62afb5f MD |
116 | static int nfs_remove (struct vop_old_remove_args *); |
117 | static int nfs_link (struct vop_old_link_args *); | |
118 | static int nfs_rename (struct vop_old_rename_args *); | |
119 | static int nfs_mkdir (struct vop_old_mkdir_args *); | |
120 | static int nfs_rmdir (struct vop_old_rmdir_args *); | |
121 | static int nfs_symlink (struct vop_old_symlink_args *); | |
a6ee311a RG |
122 | static int nfs_readdir (struct vop_readdir_args *); |
123 | static int nfs_bmap (struct vop_bmap_args *); | |
124 | static int nfs_strategy (struct vop_strategy_args *); | |
125 | static int nfs_lookitup (struct vnode *, const char *, int, | |
126 | struct ucred *, struct thread *, struct nfsnode **); | |
127 | static int nfs_sillyrename (struct vnode *,struct vnode *,struct componentname *); | |
128 | static int nfsspec_access (struct vop_access_args *); | |
129 | static int nfs_readlink (struct vop_readlink_args *); | |
130 | static int nfs_print (struct vop_print_args *); | |
131 | static int nfs_advlock (struct vop_advlock_args *); | |
fad57d0e MD |
132 | |
133 | static int nfs_nresolve (struct vop_nresolve_args *); | |
984263bc MD |
134 | /* |
135 | * Global vfs data structures for nfs | |
136 | */ | |
66a1ddf5 MD |
137 | struct vop_ops nfsv2_vnode_vops = { |
138 | .vop_default = vop_defaultop, | |
139 | .vop_access = nfs_access, | |
140 | .vop_advlock = nfs_advlock, | |
141 | .vop_bmap = nfs_bmap, | |
142 | .vop_close = nfs_close, | |
143 | .vop_old_create = nfs_create, | |
144 | .vop_fsync = nfs_fsync, | |
145 | .vop_getattr = nfs_getattr, | |
146 | .vop_getpages = nfs_getpages, | |
147 | .vop_putpages = nfs_putpages, | |
148 | .vop_inactive = nfs_inactive, | |
66a1ddf5 | 149 | .vop_old_link = nfs_link, |
66a1ddf5 MD |
150 | .vop_old_lookup = nfs_lookup, |
151 | .vop_old_mkdir = nfs_mkdir, | |
152 | .vop_old_mknod = nfs_mknod, | |
153 | .vop_mmap = nfs_mmap, | |
154 | .vop_open = nfs_open, | |
155 | .vop_poll = nfs_poll, | |
156 | .vop_print = nfs_print, | |
157 | .vop_read = nfs_read, | |
158 | .vop_readdir = nfs_readdir, | |
159 | .vop_readlink = nfs_readlink, | |
160 | .vop_reclaim = nfs_reclaim, | |
161 | .vop_old_remove = nfs_remove, | |
162 | .vop_old_rename = nfs_rename, | |
163 | .vop_old_rmdir = nfs_rmdir, | |
164 | .vop_setattr = nfs_setattr, | |
165 | .vop_strategy = nfs_strategy, | |
166 | .vop_old_symlink = nfs_symlink, | |
66a1ddf5 MD |
167 | .vop_write = nfs_write, |
168 | .vop_nresolve = nfs_nresolve | |
984263bc | 169 | }; |
984263bc MD |
170 | |
171 | /* | |
172 | * Special device vnode ops | |
173 | */ | |
66a1ddf5 MD |
174 | struct vop_ops nfsv2_spec_vops = { |
175 | .vop_default = spec_vnoperate, | |
176 | .vop_access = nfsspec_access, | |
177 | .vop_close = nfsspec_close, | |
178 | .vop_fsync = nfs_fsync, | |
179 | .vop_getattr = nfs_getattr, | |
180 | .vop_inactive = nfs_inactive, | |
66a1ddf5 MD |
181 | .vop_print = nfs_print, |
182 | .vop_read = nfsspec_read, | |
183 | .vop_reclaim = nfs_reclaim, | |
184 | .vop_setattr = nfs_setattr, | |
66a1ddf5 | 185 | .vop_write = nfsspec_write |
984263bc | 186 | }; |
984263bc | 187 | |
66a1ddf5 MD |
188 | struct vop_ops nfsv2_fifo_vops = { |
189 | .vop_default = fifo_vnoperate, | |
190 | .vop_access = nfsspec_access, | |
191 | .vop_close = nfsfifo_close, | |
192 | .vop_fsync = nfs_fsync, | |
193 | .vop_getattr = nfs_getattr, | |
194 | .vop_inactive = nfs_inactive, | |
66a1ddf5 MD |
195 | .vop_print = nfs_print, |
196 | .vop_read = nfsfifo_read, | |
197 | .vop_reclaim = nfs_reclaim, | |
198 | .vop_setattr = nfs_setattr, | |
66a1ddf5 | 199 | .vop_write = nfsfifo_write |
984263bc | 200 | }; |
984263bc | 201 | |
a6ee311a | 202 | static int nfs_mknodrpc (struct vnode *dvp, struct vnode **vpp, |
984263bc | 203 | struct componentname *cnp, |
a6ee311a RG |
204 | struct vattr *vap); |
205 | static int nfs_removerpc (struct vnode *dvp, const char *name, | |
984263bc | 206 | int namelen, |
a6ee311a RG |
207 | struct ucred *cred, struct thread *td); |
208 | static int nfs_renamerpc (struct vnode *fdvp, const char *fnameptr, | |
984263bc MD |
209 | int fnamelen, struct vnode *tdvp, |
210 | const char *tnameptr, int tnamelen, | |
a6ee311a RG |
211 | struct ucred *cred, struct thread *td); |
212 | static int nfs_renameit (struct vnode *sdvp, | |
984263bc | 213 | struct componentname *scnp, |
a6ee311a | 214 | struct sillyrename *sp); |
984263bc | 215 | |
984263bc MD |
216 | SYSCTL_DECL(_vfs_nfs); |
217 | ||
a482a28a MD |
218 | static int nfs_flush_on_rename = 1; |
219 | SYSCTL_INT(_vfs_nfs, OID_AUTO, flush_on_rename, CTLFLAG_RW, | |
220 | &nfs_flush_on_rename, 0, "flush fvp prior to rename"); | |
bb7bf7b2 MD |
221 | static int nfs_flush_on_hlink = 0; |
222 | SYSCTL_INT(_vfs_nfs, OID_AUTO, flush_on_hlink, CTLFLAG_RW, | |
223 | &nfs_flush_on_hlink, 0, "flush fvp prior to hard link"); | |
a482a28a | 224 | |
97100839 | 225 | static int nfsaccess_cache_timeout = NFS_DEFATTRTIMO; |
984263bc MD |
226 | SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_timeout, CTLFLAG_RW, |
227 | &nfsaccess_cache_timeout, 0, "NFS ACCESS cache timeout"); | |
228 | ||
4d17b298 MD |
229 | static int nfsneg_cache_timeout = NFS_MINATTRTIMO; |
230 | SYSCTL_INT(_vfs_nfs, OID_AUTO, neg_cache_timeout, CTLFLAG_RW, | |
a15b4eef MD |
231 | &nfsneg_cache_timeout, 0, "NFS NEGATIVE NAMECACHE timeout"); |
232 | ||
233 | static int nfspos_cache_timeout = NFS_MINATTRTIMO; | |
234 | SYSCTL_INT(_vfs_nfs, OID_AUTO, pos_cache_timeout, CTLFLAG_RW, | |
235 | &nfspos_cache_timeout, 0, "NFS POSITIVE NAMECACHE timeout"); | |
4d17b298 | 236 | |
984263bc MD |
237 | static int nfsv3_commit_on_close = 0; |
238 | SYSCTL_INT(_vfs_nfs, OID_AUTO, nfsv3_commit_on_close, CTLFLAG_RW, | |
239 | &nfsv3_commit_on_close, 0, "write+commit on close, else only write"); | |
240 | #if 0 | |
241 | SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_hits, CTLFLAG_RD, | |
242 | &nfsstats.accesscache_hits, 0, "NFS ACCESS cache hit count"); | |
243 | ||
244 | SYSCTL_INT(_vfs_nfs, OID_AUTO, access_cache_misses, CTLFLAG_RD, | |
245 | &nfsstats.accesscache_misses, 0, "NFS ACCESS cache miss count"); | |
246 | #endif | |
247 | ||
248 | #define NFSV3ACCESS_ALL (NFSV3ACCESS_READ | NFSV3ACCESS_MODIFY \ | |
249 | | NFSV3ACCESS_EXTEND | NFSV3ACCESS_EXECUTE \ | |
250 | | NFSV3ACCESS_DELETE | NFSV3ACCESS_LOOKUP) | |
251 | static int | |
dadab5e9 | 252 | nfs3_access_otw(struct vnode *vp, int wmode, |
e851b29e | 253 | struct thread *td, struct ucred *cred) |
984263bc | 254 | { |
42edf14f MD |
255 | struct nfsnode *np = VTONFS(vp); |
256 | int attrflag; | |
257 | int error = 0; | |
984263bc | 258 | u_int32_t *tl; |
984263bc | 259 | u_int32_t rmode; |
42edf14f MD |
260 | struct nfsm_info info; |
261 | ||
262 | info.mrep = NULL; | |
263 | info.v3 = 1; | |
984263bc MD |
264 | |
265 | nfsstats.rpccnt[NFSPROC_ACCESS]++; | |
42edf14f MD |
266 | nfsm_reqhead(&info, vp, NFSPROC_ACCESS, |
267 | NFSX_FH(info.v3) + NFSX_UNSIGNED); | |
268 | ERROROUT(nfsm_fhtom(&info, vp)); | |
269 | tl = nfsm_build(&info, NFSX_UNSIGNED); | |
984263bc | 270 | *tl = txdr_unsigned(wmode); |
42edf14f MD |
271 | NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_ACCESS, td, cred, &error)); |
272 | ERROROUT(nfsm_postop_attr(&info, vp, &attrflag, NFS_LATTR_NOSHRINK)); | |
273 | if (error == 0) { | |
274 | NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED)); | |
984263bc MD |
275 | rmode = fxdr_unsigned(u_int32_t, *tl); |
276 | np->n_mode = rmode; | |
277 | np->n_modeuid = cred->cr_uid; | |
3a6f9faf | 278 | np->n_modestamp = mycpu->gd_time_seconds; |
984263bc | 279 | } |
42edf14f MD |
280 | m_freem(info.mrep); |
281 | info.mrep = NULL; | |
6b08710e | 282 | nfsmout: |
984263bc MD |
283 | return error; |
284 | } | |
285 | ||
286 | /* | |
287 | * nfs access vnode op. | |
288 | * For nfs version 2, just return ok. File accesses may fail later. | |
289 | * For nfs version 3, use the access rpc to check accessibility. If file modes | |
290 | * are changed on the server, accesses might still fail later. | |
e851b29e | 291 | * |
b478fdce | 292 | * nfs_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred) |
984263bc MD |
293 | */ |
294 | static int | |
e851b29e | 295 | nfs_access(struct vop_access_args *ap) |
984263bc | 296 | { |
40393ded | 297 | struct vnode *vp = ap->a_vp; |
87de5057 | 298 | thread_t td = curthread; |
984263bc MD |
299 | int error = 0; |
300 | u_int32_t mode, wmode; | |
984263bc | 301 | struct nfsnode *np = VTONFS(vp); |
42edf14f | 302 | int v3 = NFS_ISV3(vp); |
984263bc MD |
303 | |
304 | /* | |
305 | * Disallow write attempts on filesystems mounted read-only; | |
306 | * unless the file is a socket, fifo, or a block or character | |
307 | * device resident on the filesystem. | |
308 | */ | |
309 | if ((ap->a_mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { | |
310 | switch (vp->v_type) { | |
311 | case VREG: | |
312 | case VDIR: | |
313 | case VLNK: | |
314 | return (EROFS); | |
315 | default: | |
316 | break; | |
317 | } | |
318 | } | |
319 | /* | |
320 | * For nfs v3, check to see if we have done this recently, and if | |
321 | * so return our cached result instead of making an ACCESS call. | |
322 | * If not, do an access rpc, otherwise you are stuck emulating | |
323 | * ufs_access() locally using the vattr. This may not be correct, | |
324 | * since the server may apply other access criteria such as | |
325 | * client uid-->server uid mapping that we do not know about. | |
326 | */ | |
327 | if (v3) { | |
328 | if (ap->a_mode & VREAD) | |
329 | mode = NFSV3ACCESS_READ; | |
330 | else | |
331 | mode = 0; | |
332 | if (vp->v_type != VDIR) { | |
333 | if (ap->a_mode & VWRITE) | |
334 | mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND); | |
335 | if (ap->a_mode & VEXEC) | |
336 | mode |= NFSV3ACCESS_EXECUTE; | |
337 | } else { | |
338 | if (ap->a_mode & VWRITE) | |
339 | mode |= (NFSV3ACCESS_MODIFY | NFSV3ACCESS_EXTEND | | |
340 | NFSV3ACCESS_DELETE); | |
341 | if (ap->a_mode & VEXEC) | |
342 | mode |= NFSV3ACCESS_LOOKUP; | |
343 | } | |
344 | /* XXX safety belt, only make blanket request if caching */ | |
345 | if (nfsaccess_cache_timeout > 0) { | |
346 | wmode = NFSV3ACCESS_READ | NFSV3ACCESS_MODIFY | | |
347 | NFSV3ACCESS_EXTEND | NFSV3ACCESS_EXECUTE | | |
348 | NFSV3ACCESS_DELETE | NFSV3ACCESS_LOOKUP; | |
349 | } else { | |
350 | wmode = mode; | |
351 | } | |
352 | ||
353 | /* | |
354 | * Does our cached result allow us to give a definite yes to | |
355 | * this request? | |
356 | */ | |
fad57d0e MD |
357 | if (np->n_modestamp && |
358 | (mycpu->gd_time_seconds < (np->n_modestamp + nfsaccess_cache_timeout)) && | |
359 | (ap->a_cred->cr_uid == np->n_modeuid) && | |
360 | ((np->n_mode & mode) == mode)) { | |
984263bc MD |
361 | nfsstats.accesscache_hits++; |
362 | } else { | |
363 | /* | |
364 | * Either a no, or a don't know. Go to the wire. | |
365 | */ | |
366 | nfsstats.accesscache_misses++; | |
87de5057 | 367 | error = nfs3_access_otw(vp, wmode, td, ap->a_cred); |
984263bc MD |
368 | if (!error) { |
369 | if ((np->n_mode & mode) != mode) { | |
370 | error = EACCES; | |
371 | } | |
372 | } | |
373 | } | |
984263bc MD |
374 | } else { |
375 | if ((error = nfsspec_access(ap)) != 0) | |
376 | return (error); | |
377 | ||
378 | /* | |
379 | * Attempt to prevent a mapped root from accessing a file | |
380 | * which it shouldn't. We try to read a byte from the file | |
381 | * if the user is root and the file is not zero length. | |
382 | * After calling nfsspec_access, we should have the correct | |
383 | * file size cached. | |
384 | */ | |
385 | if (ap->a_cred->cr_uid == 0 && (ap->a_mode & VREAD) | |
386 | && VTONFS(vp)->n_size > 0) { | |
387 | struct iovec aiov; | |
388 | struct uio auio; | |
389 | char buf[1]; | |
390 | ||
391 | aiov.iov_base = buf; | |
392 | aiov.iov_len = 1; | |
393 | auio.uio_iov = &aiov; | |
394 | auio.uio_iovcnt = 1; | |
395 | auio.uio_offset = 0; | |
396 | auio.uio_resid = 1; | |
397 | auio.uio_segflg = UIO_SYSSPACE; | |
398 | auio.uio_rw = UIO_READ; | |
87de5057 | 399 | auio.uio_td = td; |
984263bc | 400 | |
c1cf1e59 | 401 | if (vp->v_type == VREG) { |
3b568787 | 402 | error = nfs_readrpc(vp, &auio); |
c1cf1e59 | 403 | } else if (vp->v_type == VDIR) { |
984263bc | 404 | char* bp; |
efda3bd0 | 405 | bp = kmalloc(NFS_DIRBLKSIZ, M_TEMP, M_WAITOK); |
984263bc MD |
406 | aiov.iov_base = bp; |
407 | aiov.iov_len = auio.uio_resid = NFS_DIRBLKSIZ; | |
3b568787 | 408 | error = nfs_readdirrpc(vp, &auio); |
efda3bd0 | 409 | kfree(bp, M_TEMP); |
c1cf1e59 | 410 | } else if (vp->v_type == VLNK) { |
3b568787 | 411 | error = nfs_readlinkrpc(vp, &auio); |
c1cf1e59 | 412 | } else { |
984263bc | 413 | error = EACCES; |
c1cf1e59 | 414 | } |
984263bc | 415 | } |
984263bc | 416 | } |
c1cf1e59 MD |
417 | /* |
418 | * [re]record creds for reading and/or writing if access | |
09b1ee9b MD |
419 | * was granted. Assume the NFS server will grant read access |
420 | * for execute requests. | |
c1cf1e59 MD |
421 | */ |
422 | if (error == 0) { | |
09b1ee9b | 423 | if ((ap->a_mode & (VREAD|VEXEC)) && ap->a_cred != np->n_rucred) { |
c1cf1e59 MD |
424 | crhold(ap->a_cred); |
425 | if (np->n_rucred) | |
426 | crfree(np->n_rucred); | |
427 | np->n_rucred = ap->a_cred; | |
428 | } | |
429 | if ((ap->a_mode & VWRITE) && ap->a_cred != np->n_wucred) { | |
430 | crhold(ap->a_cred); | |
431 | if (np->n_wucred) | |
432 | crfree(np->n_wucred); | |
433 | np->n_wucred = ap->a_cred; | |
434 | } | |
435 | } | |
436 | return(error); | |
984263bc MD |
437 | } |
438 | ||
439 | /* | |
440 | * nfs open vnode op | |
441 | * Check to see if the type is ok | |
442 | * and that deletion is not in progress. | |
443 | * For paged in text files, you will need to flush the page cache | |
444 | * if consistency is lost. | |
e851b29e | 445 | * |
b478fdce SW |
446 | * nfs_open(struct vnode *a_vp, int a_mode, struct ucred *a_cred, |
447 | * struct file *a_fp) | |
984263bc MD |
448 | */ |
449 | /* ARGSUSED */ | |
450 | static int | |
e851b29e | 451 | nfs_open(struct vop_open_args *ap) |
984263bc | 452 | { |
40393ded | 453 | struct vnode *vp = ap->a_vp; |
984263bc | 454 | struct nfsnode *np = VTONFS(vp); |
984263bc MD |
455 | struct vattr vattr; |
456 | int error; | |
457 | ||
458 | if (vp->v_type != VREG && vp->v_type != VDIR && vp->v_type != VLNK) { | |
459 | #ifdef DIAGNOSTIC | |
086c1d7e | 460 | kprintf("open eacces vtyp=%d\n",vp->v_type); |
984263bc | 461 | #endif |
ca3a2b2f | 462 | return (EOPNOTSUPP); |
984263bc | 463 | } |
5a9187cb | 464 | |
ed94161f MD |
465 | /* |
466 | * Save valid creds for reading and writing for later RPCs. | |
467 | */ | |
468 | if ((ap->a_mode & FREAD) && ap->a_cred != np->n_rucred) { | |
469 | crhold(ap->a_cred); | |
470 | if (np->n_rucred) | |
471 | crfree(np->n_rucred); | |
472 | np->n_rucred = ap->a_cred; | |
473 | } | |
474 | if ((ap->a_mode & FWRITE) && ap->a_cred != np->n_wucred) { | |
475 | crhold(ap->a_cred); | |
476 | if (np->n_wucred) | |
477 | crfree(np->n_wucred); | |
478 | np->n_wucred = ap->a_cred; | |
479 | } | |
480 | ||
984263bc | 481 | /* |
5a9187cb MD |
482 | * Clear the attribute cache only if opening with write access. It |
483 | * is unclear if we should do this at all here, but we certainly | |
484 | * should not clear the cache unconditionally simply because a file | |
485 | * is being opened. | |
984263bc | 486 | */ |
5a9187cb MD |
487 | if (ap->a_mode & FWRITE) |
488 | np->n_attrstamp = 0; | |
489 | ||
e07fef60 MD |
490 | /* |
491 | * For normal NFS, reconcile changes made locally verses | |
492 | * changes made remotely. Note that VOP_GETATTR only goes | |
493 | * to the wire if the cached attribute has timed out or been | |
494 | * cleared. | |
495 | * | |
496 | * If local modifications have been made clear the attribute | |
497 | * cache to force an attribute and modified time check. If | |
498 | * GETATTR detects that the file has been changed by someone | |
499 | * other then us it will set NRMODIFIED. | |
500 | * | |
501 | * If we are opening a directory and local changes have been | |
502 | * made we have to invalidate the cache in order to ensure | |
503 | * that we get the most up-to-date information from the | |
504 | * server. XXX | |
505 | */ | |
506 | if (np->n_flag & NLMODIFIED) { | |
507 | np->n_attrstamp = 0; | |
508 | if (vp->v_type == VDIR) { | |
87de5057 | 509 | error = nfs_vinvalbuf(vp, V_SAVE, 1); |
5a9187cb MD |
510 | if (error == EINTR) |
511 | return (error); | |
e07fef60 | 512 | nfs_invaldir(vp); |
5a9187cb | 513 | } |
984263bc | 514 | } |
87de5057 | 515 | error = VOP_GETATTR(vp, &vattr); |
e07fef60 MD |
516 | if (error) |
517 | return (error); | |
518 | if (np->n_flag & NRMODIFIED) { | |
519 | if (vp->v_type == VDIR) | |
520 | nfs_invaldir(vp); | |
87de5057 | 521 | error = nfs_vinvalbuf(vp, V_SAVE, 1); |
e07fef60 MD |
522 | if (error == EINTR) |
523 | return (error); | |
524 | np->n_flag &= ~NRMODIFIED; | |
525 | } | |
fad57d0e | 526 | |
8ddc6004 | 527 | return (vop_stdopen(ap)); |
984263bc MD |
528 | } |
529 | ||
530 | /* | |
531 | * nfs close vnode op | |
532 | * What an NFS client should do upon close after writing is a debatable issue. | |
533 | * Most NFS clients push delayed writes to the server upon close, basically for | |
534 | * two reasons: | |
535 | * 1 - So that any write errors may be reported back to the client process | |
536 | * doing the close system call. By far the two most likely errors are | |
537 | * NFSERR_NOSPC and NFSERR_DQUOT to indicate space allocation failure. | |
538 | * 2 - To put a worst case upper bound on cache inconsistency between | |
539 | * multiple clients for the file. | |
540 | * There is also a consistency problem for Version 2 of the protocol w.r.t. | |
541 | * not being able to tell if other clients are writing a file concurrently, | |
542 | * since there is no way of knowing if the changed modify time in the reply | |
543 | * is only due to the write for this client. | |
544 | * (NFS Version 3 provides weak cache consistency data in the reply that | |
545 | * should be sufficient to detect and handle this case.) | |
546 | * | |
547 | * The current code does the following: | |
548 | * for NFS Version 2 - play it safe and flush/invalidate all dirty buffers | |
549 | * for NFS Version 3 - flush dirty buffers to the server but don't invalidate | |
550 | * or commit them (this satisfies 1 and 2 except for the | |
551 | * case where the server crashes after this close but | |
552 | * before the commit RPC, which is felt to be "good | |
553 | * enough". Changing the last argument to nfs_flush() to | |
554 | * a 1 would force a commit operation, if it is felt a | |
555 | * commit is necessary now. | |
556 | * for NQNFS - do nothing now, since 2 is dealt with via leases and | |
557 | * 1 should be dealt with via an fsync() system call for | |
558 | * cases where write errors are important. | |
e851b29e | 559 | * |
b478fdce | 560 | * nfs_close(struct vnode *a_vp, int a_fflag) |
984263bc MD |
561 | */ |
562 | /* ARGSUSED */ | |
563 | static int | |
e851b29e | 564 | nfs_close(struct vop_close_args *ap) |
984263bc | 565 | { |
40393ded RG |
566 | struct vnode *vp = ap->a_vp; |
567 | struct nfsnode *np = VTONFS(vp); | |
984263bc | 568 | int error = 0; |
87de5057 | 569 | thread_t td = curthread; |
984263bc MD |
570 | |
571 | if (vp->v_type == VREG) { | |
e07fef60 | 572 | if (np->n_flag & NLMODIFIED) { |
984263bc MD |
573 | if (NFS_ISV3(vp)) { |
574 | /* | |
575 | * Under NFSv3 we have dirty buffers to dispose of. We | |
576 | * must flush them to the NFS server. We have the option | |
577 | * of waiting all the way through the commit rpc or just | |
578 | * waiting for the initial write. The default is to only | |
579 | * wait through the initial write so the data is in the | |
580 | * server's cache, which is roughly similar to the state | |
581 | * a standard disk subsystem leaves the file in on close(). | |
582 | * | |
5a9187cb | 583 | * We cannot clear the NLMODIFIED bit in np->n_flag due to |
984263bc MD |
584 | * potential races with other processes, and certainly |
585 | * cannot clear it if we don't commit. | |
586 | */ | |
587 | int cm = nfsv3_commit_on_close ? 1 : 0; | |
87de5057 | 588 | error = nfs_flush(vp, MNT_WAIT, td, cm); |
5a9187cb | 589 | /* np->n_flag &= ~NLMODIFIED; */ |
984263bc | 590 | } else { |
87de5057 | 591 | error = nfs_vinvalbuf(vp, V_SAVE, 1); |
984263bc MD |
592 | } |
593 | np->n_attrstamp = 0; | |
594 | } | |
595 | if (np->n_flag & NWRITEERR) { | |
596 | np->n_flag &= ~NWRITEERR; | |
597 | error = np->n_error; | |
598 | } | |
599 | } | |
8ddc6004 | 600 | vop_stdclose(ap); |
984263bc MD |
601 | return (error); |
602 | } | |
603 | ||
604 | /* | |
605 | * nfs getattr call from vfs. | |
e851b29e | 606 | * |
b478fdce | 607 | * nfs_getattr(struct vnode *a_vp, struct vattr *a_vap) |
984263bc MD |
608 | */ |
609 | static int | |
e851b29e | 610 | nfs_getattr(struct vop_getattr_args *ap) |
984263bc | 611 | { |
40393ded RG |
612 | struct vnode *vp = ap->a_vp; |
613 | struct nfsnode *np = VTONFS(vp); | |
984263bc | 614 | int error = 0; |
87de5057 | 615 | thread_t td = curthread; |
42edf14f MD |
616 | struct nfsm_info info; |
617 | ||
618 | info.mrep = NULL; | |
619 | info.v3 = NFS_ISV3(vp); | |
984263bc MD |
620 | |
621 | /* | |
622 | * Update local times for special files. | |
623 | */ | |
624 | if (np->n_flag & (NACC | NUPD)) | |
625 | np->n_flag |= NCHG; | |
626 | /* | |
627 | * First look in the cache. | |
628 | */ | |
629 | if (nfs_getattrcache(vp, ap->a_vap) == 0) | |
630 | return (0); | |
631 | ||
42edf14f | 632 | if (info.v3 && nfsaccess_cache_timeout > 0) { |
984263bc | 633 | nfsstats.accesscache_misses++; |
87de5057 | 634 | nfs3_access_otw(vp, NFSV3ACCESS_ALL, td, nfs_vpcred(vp, ND_CHECK)); |
984263bc MD |
635 | if (nfs_getattrcache(vp, ap->a_vap) == 0) |
636 | return (0); | |
637 | } | |
638 | ||
639 | nfsstats.rpccnt[NFSPROC_GETATTR]++; | |
42edf14f MD |
640 | nfsm_reqhead(&info, vp, NFSPROC_GETATTR, NFSX_FH(info.v3)); |
641 | ERROROUT(nfsm_fhtom(&info, vp)); | |
642 | NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_GETATTR, td, | |
643 | nfs_vpcred(vp, ND_CHECK), &error)); | |
644 | if (error == 0) { | |
645 | ERROROUT(nfsm_loadattr(&info, vp, ap->a_vap)); | |
984263bc | 646 | } |
42edf14f MD |
647 | m_freem(info.mrep); |
648 | info.mrep = NULL; | |
6b08710e | 649 | nfsmout: |
984263bc MD |
650 | return (error); |
651 | } | |
652 | ||
653 | /* | |
654 | * nfs setattr call. | |
e851b29e | 655 | * |
31bd717a | 656 | * nfs_setattr(struct vnode *a_vp, struct vattr *a_vap, struct ucred *a_cred) |
984263bc MD |
657 | */ |
658 | static int | |
e851b29e | 659 | nfs_setattr(struct vop_setattr_args *ap) |
984263bc | 660 | { |
40393ded RG |
661 | struct vnode *vp = ap->a_vp; |
662 | struct nfsnode *np = VTONFS(vp); | |
663 | struct vattr *vap = ap->a_vap; | |
984263bc MD |
664 | int error = 0; |
665 | u_quad_t tsize; | |
87de5057 | 666 | thread_t td = curthread; |
984263bc MD |
667 | |
668 | #ifndef nolint | |
669 | tsize = (u_quad_t)0; | |
670 | #endif | |
671 | ||
672 | /* | |
673 | * Setting of flags is not supported. | |
674 | */ | |
675 | if (vap->va_flags != VNOVAL) | |
676 | return (EOPNOTSUPP); | |
677 | ||
678 | /* | |
679 | * Disallow write attempts if the filesystem is mounted read-only. | |
680 | */ | |
681 | if ((vap->va_flags != VNOVAL || vap->va_uid != (uid_t)VNOVAL || | |
682 | vap->va_gid != (gid_t)VNOVAL || vap->va_atime.tv_sec != VNOVAL || | |
683 | vap->va_mtime.tv_sec != VNOVAL || vap->va_mode != (mode_t)VNOVAL) && | |
684 | (vp->v_mount->mnt_flag & MNT_RDONLY)) | |
685 | return (EROFS); | |
a482a28a | 686 | |
984263bc | 687 | if (vap->va_size != VNOVAL) { |
a482a28a MD |
688 | /* |
689 | * truncation requested | |
690 | */ | |
984263bc MD |
691 | switch (vp->v_type) { |
692 | case VDIR: | |
693 | return (EISDIR); | |
694 | case VCHR: | |
695 | case VBLK: | |
696 | case VSOCK: | |
697 | case VFIFO: | |
698 | if (vap->va_mtime.tv_sec == VNOVAL && | |
699 | vap->va_atime.tv_sec == VNOVAL && | |
700 | vap->va_mode == (mode_t)VNOVAL && | |
701 | vap->va_uid == (uid_t)VNOVAL && | |
702 | vap->va_gid == (gid_t)VNOVAL) | |
703 | return (0); | |
704 | vap->va_size = VNOVAL; | |
705 | break; | |
706 | default: | |
707 | /* | |
708 | * Disallow write attempts if the filesystem is | |
709 | * mounted read-only. | |
710 | */ | |
711 | if (vp->v_mount->mnt_flag & MNT_RDONLY) | |
712 | return (EROFS); | |
713 | ||
714 | /* | |
a004bca6 MD |
715 | * This is nasty. The RPCs we send to flush pending |
716 | * data often return attribute information which is | |
717 | * cached via a callback to nfs_loadattrcache(), which | |
718 | * has the effect of changing our notion of the file | |
719 | * size. Due to flushed appends and other operations | |
720 | * the file size can be set to virtually anything, | |
721 | * including values that do not match either the old | |
722 | * or intended file size. | |
723 | * | |
724 | * When this condition is detected we must loop to | |
725 | * try the operation again. Hopefully no more | |
726 | * flushing is required on the loop so it works the | |
727 | * second time around. THIS CASE ALMOST ALWAYS | |
728 | * HAPPENS! | |
984263bc | 729 | */ |
984263bc | 730 | tsize = np->n_size; |
a004bca6 | 731 | again: |
87de5057 | 732 | error = nfs_meta_setsize(vp, td, vap->va_size); |
984263bc | 733 | |
5a9187cb | 734 | if (np->n_flag & NLMODIFIED) { |
984263bc | 735 | if (vap->va_size == 0) |
87de5057 | 736 | error = nfs_vinvalbuf(vp, 0, 1); |
984263bc | 737 | else |
87de5057 | 738 | error = nfs_vinvalbuf(vp, V_SAVE, 1); |
984263bc | 739 | } |
a004bca6 MD |
740 | /* |
741 | * note: this loop case almost always happens at | |
742 | * least once per truncation. | |
b07fc55c | 743 | */ |
a004bca6 MD |
744 | if (error == 0 && np->n_size != vap->va_size) |
745 | goto again; | |
746 | np->n_vattr.va_size = vap->va_size; | |
5a9187cb MD |
747 | break; |
748 | } | |
a482a28a MD |
749 | } else if ((np->n_flag & NLMODIFIED) && vp->v_type == VREG) { |
750 | /* | |
751 | * What to do. If we are modifying the mtime we lose | |
752 | * mtime detection of changes made by the server or other | |
753 | * clients. But programs like rsync/rdist/cpdup are going | |
754 | * to call utimes a lot. We don't want to piecemeal sync. | |
755 | * | |
756 | * For now sync if any prior remote changes were detected, | |
757 | * but allow us to lose track of remote changes made during | |
758 | * the utimes operation. | |
759 | */ | |
760 | if (np->n_flag & NRMODIFIED) | |
761 | error = nfs_vinvalbuf(vp, V_SAVE, 1); | |
762 | if (error == EINTR) | |
763 | return (error); | |
764 | if (error == 0) { | |
765 | if (vap->va_mtime.tv_sec != VNOVAL) { | |
766 | np->n_mtime = vap->va_mtime.tv_sec; | |
767 | } | |
768 | } | |
a004bca6 | 769 | } |
87de5057 | 770 | error = nfs_setattrrpc(vp, vap, ap->a_cred, td); |
a004bca6 MD |
771 | |
772 | /* | |
773 | * Sanity check if a truncation was issued. This should only occur | |
774 | * if multiple processes are racing on the same file. | |
775 | */ | |
776 | if (error == 0 && vap->va_size != VNOVAL && | |
777 | np->n_size != vap->va_size) { | |
973c11b9 MD |
778 | kprintf("NFS ftruncate: server disagrees on the file size: " |
779 | "%lld/%lld/%lld\n", | |
780 | (long long)tsize, | |
781 | (long long)vap->va_size, | |
782 | (long long)np->n_size); | |
a004bca6 MD |
783 | goto again; |
784 | } | |
984263bc MD |
785 | if (error && vap->va_size != VNOVAL) { |
786 | np->n_size = np->n_vattr.va_size = tsize; | |
787 | vnode_pager_setsize(vp, np->n_size); | |
788 | } | |
789 | return (error); | |
790 | } | |
791 | ||
792 | /* | |
793 | * Do an nfs setattr rpc. | |
794 | */ | |
795 | static int | |
dadab5e9 | 796 | nfs_setattrrpc(struct vnode *vp, struct vattr *vap, |
e851b29e | 797 | struct ucred *cred, struct thread *td) |
984263bc | 798 | { |
40393ded | 799 | struct nfsv2_sattr *sp; |
999914df | 800 | struct nfsnode *np = VTONFS(vp); |
984263bc MD |
801 | u_int32_t *tl; |
802 | int error = 0, wccflag = NFSV3_WCCRATTR; | |
42edf14f MD |
803 | struct nfsm_info info; |
804 | ||
805 | info.mrep = NULL; | |
806 | info.v3 = NFS_ISV3(vp); | |
984263bc MD |
807 | |
808 | nfsstats.rpccnt[NFSPROC_SETATTR]++; | |
42edf14f MD |
809 | nfsm_reqhead(&info, vp, NFSPROC_SETATTR, |
810 | NFSX_FH(info.v3) + NFSX_SATTR(info.v3)); | |
811 | ERROROUT(nfsm_fhtom(&info, vp)); | |
812 | if (info.v3) { | |
813 | nfsm_v3attrbuild(&info, vap, TRUE); | |
814 | tl = nfsm_build(&info, NFSX_UNSIGNED); | |
984263bc MD |
815 | *tl = nfs_false; |
816 | } else { | |
42edf14f | 817 | sp = nfsm_build(&info, NFSX_V2SATTR); |
984263bc MD |
818 | if (vap->va_mode == (mode_t)VNOVAL) |
819 | sp->sa_mode = nfs_xdrneg1; | |
820 | else | |
821 | sp->sa_mode = vtonfsv2_mode(vp->v_type, vap->va_mode); | |
822 | if (vap->va_uid == (uid_t)VNOVAL) | |
823 | sp->sa_uid = nfs_xdrneg1; | |
824 | else | |
825 | sp->sa_uid = txdr_unsigned(vap->va_uid); | |
826 | if (vap->va_gid == (gid_t)VNOVAL) | |
827 | sp->sa_gid = nfs_xdrneg1; | |
828 | else | |
829 | sp->sa_gid = txdr_unsigned(vap->va_gid); | |
830 | sp->sa_size = txdr_unsigned(vap->va_size); | |
831 | txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); | |
832 | txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); | |
833 | } | |
42edf14f MD |
834 | NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_SETATTR, td, cred, &error)); |
835 | if (info.v3) { | |
999914df | 836 | np->n_modestamp = 0; |
42edf14f MD |
837 | ERROROUT(nfsm_wcc_data(&info, vp, &wccflag)); |
838 | } else { | |
839 | ERROROUT(nfsm_loadattr(&info, vp, NULL)); | |
840 | } | |
841 | m_freem(info.mrep); | |
842 | info.mrep = NULL; | |
6b08710e | 843 | nfsmout: |
984263bc MD |
844 | return (error); |
845 | } | |
846 | ||
a15b4eef MD |
847 | static |
848 | void | |
849 | nfs_cache_setvp(struct nchandle *nch, struct vnode *vp, int nctimeout) | |
850 | { | |
851 | if (nctimeout == 0) | |
852 | nctimeout = 1; | |
853 | else | |
854 | nctimeout *= hz; | |
855 | cache_setvp(nch, vp); | |
856 | cache_settimeout(nch, nctimeout); | |
857 | } | |
858 | ||
fad57d0e MD |
859 | /* |
860 | * NEW API CALL - replaces nfs_lookup(). However, we cannot remove | |
861 | * nfs_lookup() until all remaining new api calls are implemented. | |
862 | * | |
863 | * Resolve a namecache entry. This function is passed a locked ncp and | |
a15b4eef | 864 | * must call nfs_cache_setvp() on it as appropriate to resolve the entry. |
fad57d0e MD |
865 | */ |
866 | static int | |
867 | nfs_nresolve(struct vop_nresolve_args *ap) | |
868 | { | |
869 | struct thread *td = curthread; | |
870 | struct namecache *ncp; | |
871 | struct ucred *cred; | |
872 | struct nfsnode *np; | |
873 | struct vnode *dvp; | |
874 | struct vnode *nvp; | |
875 | nfsfh_t *fhp; | |
876 | int attrflag; | |
877 | int fhsize; | |
878 | int error; | |
046b7e33 | 879 | int tmp_error; |
fad57d0e | 880 | int len; |
42edf14f | 881 | struct nfsm_info info; |
fad57d0e MD |
882 | |
883 | cred = ap->a_cred; | |
dff430ab | 884 | dvp = ap->a_dvp; |
fad57d0e | 885 | |
87de5057 | 886 | if ((error = vget(dvp, LK_SHARED)) != 0) |
fad57d0e MD |
887 | return (error); |
888 | ||
42edf14f MD |
889 | info.mrep = NULL; |
890 | info.v3 = NFS_ISV3(dvp); | |
891 | ||
fad57d0e | 892 | nvp = NULL; |
fad57d0e MD |
893 | nfsstats.lookupcache_misses++; |
894 | nfsstats.rpccnt[NFSPROC_LOOKUP]++; | |
dff430ab | 895 | ncp = ap->a_nch->ncp; |
fad57d0e | 896 | len = ncp->nc_nlen; |
42edf14f MD |
897 | nfsm_reqhead(&info, dvp, NFSPROC_LOOKUP, |
898 | NFSX_FH(info.v3) + NFSX_UNSIGNED + nfsm_rndup(len)); | |
899 | ERROROUT(nfsm_fhtom(&info, dvp)); | |
900 | ERROROUT(nfsm_strtom(&info, ncp->nc_name, len, NFS_MAXNAMLEN)); | |
901 | NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_LOOKUP, td, | |
902 | ap->a_cred, &error)); | |
fad57d0e MD |
903 | if (error) { |
904 | /* | |
905 | * Cache negatve lookups to reduce NFS traffic, but use | |
906 | * a fast timeout. Otherwise use a timeout of 1 tick. | |
907 | * XXX we should add a namecache flag for no-caching | |
908 | * to uncache the negative hit as soon as possible, but | |
909 | * we cannot simply destroy the entry because it is used | |
910 | * as a placeholder by the caller. | |
046b7e33 MD |
911 | * |
912 | * The refactored nfs code will overwrite a non-zero error | |
913 | * with 0 when we use ERROROUT(), so don't here. | |
fad57d0e | 914 | */ |
a15b4eef MD |
915 | if (error == ENOENT) |
916 | nfs_cache_setvp(ap->a_nch, NULL, nfsneg_cache_timeout); | |
046b7e33 MD |
917 | tmp_error = nfsm_postop_attr(&info, dvp, &attrflag, |
918 | NFS_LATTR_NOSHRINK); | |
919 | if (tmp_error) { | |
920 | error = tmp_error; | |
921 | goto nfsmout; | |
922 | } | |
42edf14f MD |
923 | m_freem(info.mrep); |
924 | info.mrep = NULL; | |
fad57d0e MD |
925 | goto nfsmout; |
926 | } | |
927 | ||
928 | /* | |
929 | * Success, get the file handle, do various checks, and load | |
930 | * post-operation data from the reply packet. Theoretically | |
931 | * we should never be looking up "." so, theoretically, we | |
932 | * should never get the same file handle as our directory. But | |
933 | * we check anyway. XXX | |
934 | * | |
935 | * Note that no timeout is set for the positive cache hit. We | |
936 | * assume, theoretically, that ESTALE returns will be dealt with | |
937 | * properly to handle NFS races and in anycase we cannot depend | |
938 | * on a timeout to deal with NFS open/create/excl issues so instead | |
939 | * of a bad hack here the rest of the NFS client code needs to do | |
940 | * the right thing. | |
941 | */ | |
42edf14f | 942 | NEGATIVEOUT(fhsize = nfsm_getfh(&info, &fhp)); |
fad57d0e MD |
943 | |
944 | np = VTONFS(dvp); | |
945 | if (NFS_CMPFH(np, fhp, fhsize)) { | |
946 | vref(dvp); | |
947 | nvp = dvp; | |
948 | } else { | |
949 | error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); | |
950 | if (error) { | |
42edf14f MD |
951 | m_freem(info.mrep); |
952 | info.mrep = NULL; | |
fad57d0e MD |
953 | vput(dvp); |
954 | return (error); | |
955 | } | |
956 | nvp = NFSTOV(np); | |
957 | } | |
42edf14f MD |
958 | if (info.v3) { |
959 | ERROROUT(nfsm_postop_attr(&info, nvp, &attrflag, | |
960 | NFS_LATTR_NOSHRINK)); | |
961 | ERROROUT(nfsm_postop_attr(&info, dvp, &attrflag, | |
962 | NFS_LATTR_NOSHRINK)); | |
fad57d0e | 963 | } else { |
42edf14f | 964 | ERROROUT(nfsm_loadattr(&info, nvp, NULL)); |
fad57d0e | 965 | } |
a15b4eef | 966 | nfs_cache_setvp(ap->a_nch, nvp, nfspos_cache_timeout); |
42edf14f MD |
967 | m_freem(info.mrep); |
968 | info.mrep = NULL; | |
fad57d0e MD |
969 | nfsmout: |
970 | vput(dvp); | |
971 | if (nvp) { | |
972 | if (nvp == dvp) | |
973 | vrele(nvp); | |
974 | else | |
975 | vput(nvp); | |
976 | } | |
977 | return (error); | |
978 | } | |
979 | ||
984263bc | 980 | /* |
4d17b298 | 981 | * 'cached' nfs directory lookup |
e851b29e | 982 | * |
fad57d0e MD |
983 | * NOTE: cannot be removed until NFS implements all the new n*() API calls. |
984 | * | |
31bd717a MD |
985 | * nfs_lookup(struct vnode *a_dvp, struct vnode **a_vpp, |
986 | * struct componentname *a_cnp) | |
984263bc MD |
987 | */ |
988 | static int | |
e62afb5f | 989 | nfs_lookup(struct vop_old_lookup_args *ap) |
984263bc MD |
990 | { |
991 | struct componentname *cnp = ap->a_cnp; | |
992 | struct vnode *dvp = ap->a_dvp; | |
993 | struct vnode **vpp = ap->a_vpp; | |
994 | int flags = cnp->cn_flags; | |
995 | struct vnode *newvp; | |
984263bc | 996 | struct nfsmount *nmp; |
984263bc MD |
997 | long len; |
998 | nfsfh_t *fhp; | |
999 | struct nfsnode *np; | |
046b7e33 MD |
1000 | int lockparent, wantparent, attrflag, fhsize; |
1001 | int error; | |
1002 | int tmp_error; | |
42edf14f MD |
1003 | struct nfsm_info info; |
1004 | ||
1005 | info.mrep = NULL; | |
1006 | info.v3 = NFS_ISV3(dvp); | |
046b7e33 | 1007 | error = 0; |
984263bc | 1008 | |
4d17b298 MD |
1009 | /* |
1010 | * Read-only mount check and directory check. | |
1011 | */ | |
984263bc | 1012 | *vpp = NULLVP; |
fad57d0e | 1013 | if ((dvp->v_mount->mnt_flag & MNT_RDONLY) && |
2b69e610 | 1014 | (cnp->cn_nameiop == NAMEI_DELETE || cnp->cn_nameiop == NAMEI_RENAME)) |
984263bc | 1015 | return (EROFS); |
4d17b298 | 1016 | |
984263bc MD |
1017 | if (dvp->v_type != VDIR) |
1018 | return (ENOTDIR); | |
4d17b298 MD |
1019 | |
1020 | /* | |
1021 | * Look it up in the cache. Note that ENOENT is only returned if we | |
1022 | * previously entered a negative hit (see later on). The additional | |
1023 | * nfsneg_cache_timeout check causes previously cached results to | |
1024 | * be instantly ignored if the negative caching is turned off. | |
1025 | */ | |
2b69e610 MD |
1026 | lockparent = flags & CNP_LOCKPARENT; |
1027 | wantparent = flags & (CNP_LOCKPARENT|CNP_WANTPARENT); | |
984263bc MD |
1028 | nmp = VFSTONFS(dvp->v_mount); |
1029 | np = VTONFS(dvp); | |
984263bc | 1030 | |
4d17b298 | 1031 | /* |
fad57d0e | 1032 | * Go to the wire. |
4d17b298 | 1033 | */ |
984263bc MD |
1034 | error = 0; |
1035 | newvp = NULLVP; | |
1036 | nfsstats.lookupcache_misses++; | |
1037 | nfsstats.rpccnt[NFSPROC_LOOKUP]++; | |
1038 | len = cnp->cn_namelen; | |
42edf14f MD |
1039 | nfsm_reqhead(&info, dvp, NFSPROC_LOOKUP, |
1040 | NFSX_FH(info.v3) + NFSX_UNSIGNED + nfsm_rndup(len)); | |
1041 | ERROROUT(nfsm_fhtom(&info, dvp)); | |
1042 | ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, len, NFS_MAXNAMLEN)); | |
1043 | NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_LOOKUP, cnp->cn_td, | |
1044 | cnp->cn_cred, &error)); | |
984263bc | 1045 | if (error) { |
046b7e33 MD |
1046 | tmp_error = nfsm_postop_attr(&info, dvp, &attrflag, |
1047 | NFS_LATTR_NOSHRINK); | |
1048 | if (tmp_error) { | |
1049 | error = tmp_error; | |
1050 | goto nfsmout; | |
1051 | } | |
1052 | ||
42edf14f MD |
1053 | m_freem(info.mrep); |
1054 | info.mrep = NULL; | |
984263bc MD |
1055 | goto nfsmout; |
1056 | } | |
42edf14f | 1057 | NEGATIVEOUT(fhsize = nfsm_getfh(&info, &fhp)); |
984263bc MD |
1058 | |
1059 | /* | |
1060 | * Handle RENAME case... | |
1061 | */ | |
fad57d0e | 1062 | if (cnp->cn_nameiop == NAMEI_RENAME && wantparent) { |
984263bc | 1063 | if (NFS_CMPFH(np, fhp, fhsize)) { |
42edf14f MD |
1064 | m_freem(info.mrep); |
1065 | info.mrep = NULL; | |
984263bc MD |
1066 | return (EISDIR); |
1067 | } | |
1068 | error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); | |
1069 | if (error) { | |
42edf14f MD |
1070 | m_freem(info.mrep); |
1071 | info.mrep = NULL; | |
984263bc MD |
1072 | return (error); |
1073 | } | |
1074 | newvp = NFSTOV(np); | |
42edf14f MD |
1075 | if (info.v3) { |
1076 | ERROROUT(nfsm_postop_attr(&info, newvp, &attrflag, | |
1077 | NFS_LATTR_NOSHRINK)); | |
1078 | ERROROUT(nfsm_postop_attr(&info, dvp, &attrflag, | |
1079 | NFS_LATTR_NOSHRINK)); | |
1080 | } else { | |
1081 | ERROROUT(nfsm_loadattr(&info, newvp, NULL)); | |
1082 | } | |
984263bc | 1083 | *vpp = newvp; |
42edf14f MD |
1084 | m_freem(info.mrep); |
1085 | info.mrep = NULL; | |
7ab77df6 | 1086 | if (!lockparent) { |
a11aaa81 | 1087 | vn_unlock(dvp); |
7ab77df6 MD |
1088 | cnp->cn_flags |= CNP_PDIRUNLOCK; |
1089 | } | |
984263bc MD |
1090 | return (0); |
1091 | } | |
1092 | ||
2b69e610 | 1093 | if (flags & CNP_ISDOTDOT) { |
a11aaa81 | 1094 | vn_unlock(dvp); |
7ab77df6 | 1095 | cnp->cn_flags |= CNP_PDIRUNLOCK; |
984263bc MD |
1096 | error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); |
1097 | if (error) { | |
ca466bae | 1098 | vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY); |
7ab77df6 MD |
1099 | cnp->cn_flags &= ~CNP_PDIRUNLOCK; |
1100 | return (error); /* NOTE: return error from nget */ | |
984263bc MD |
1101 | } |
1102 | newvp = NFSTOV(np); | |
fad57d0e | 1103 | if (lockparent) { |
ca466bae | 1104 | error = vn_lock(dvp, LK_EXCLUSIVE); |
7ab77df6 MD |
1105 | if (error) { |
1106 | vput(newvp); | |
1107 | return (error); | |
1108 | } | |
1109 | cnp->cn_flags |= CNP_PDIRUNLOCK; | |
984263bc MD |
1110 | } |
1111 | } else if (NFS_CMPFH(np, fhp, fhsize)) { | |
597aea93 | 1112 | vref(dvp); |
984263bc MD |
1113 | newvp = dvp; |
1114 | } else { | |
1115 | error = nfs_nget(dvp->v_mount, fhp, fhsize, &np); | |
1116 | if (error) { | |
42edf14f MD |
1117 | m_freem(info.mrep); |
1118 | info.mrep = NULL; | |
984263bc MD |
1119 | return (error); |
1120 | } | |
fad57d0e | 1121 | if (!lockparent) { |
a11aaa81 | 1122 | vn_unlock(dvp); |
7ab77df6 MD |
1123 | cnp->cn_flags |= CNP_PDIRUNLOCK; |
1124 | } | |
984263bc MD |
1125 | newvp = NFSTOV(np); |
1126 | } | |
42edf14f MD |
1127 | if (info.v3) { |
1128 | ERROROUT(nfsm_postop_attr(&info, newvp, &attrflag, | |
1129 | NFS_LATTR_NOSHRINK)); | |
1130 | ERROROUT(nfsm_postop_attr(&info, dvp, &attrflag, | |
1131 | NFS_LATTR_NOSHRINK)); | |
1132 | } else { | |
1133 | ERROROUT(nfsm_loadattr(&info, newvp, NULL)); | |
1134 | } | |
fad57d0e MD |
1135 | #if 0 |
1136 | /* XXX MOVE TO nfs_nremove() */ | |
2b69e610 | 1137 | if ((cnp->cn_flags & CNP_MAKEENTRY) && |
fad57d0e MD |
1138 | cnp->cn_nameiop != NAMEI_DELETE) { |
1139 | np->n_ctime = np->n_vattr.va_ctime.tv_sec; /* XXX */ | |
984263bc | 1140 | } |
fad57d0e | 1141 | #endif |
984263bc | 1142 | *vpp = newvp; |
42edf14f MD |
1143 | m_freem(info.mrep); |
1144 | info.mrep = NULL; | |
6b08710e | 1145 | nfsmout: |
984263bc MD |
1146 | if (error) { |
1147 | if (newvp != NULLVP) { | |
1148 | vrele(newvp); | |
1149 | *vpp = NULLVP; | |
1150 | } | |
fad57d0e MD |
1151 | if ((cnp->cn_nameiop == NAMEI_CREATE || |
1152 | cnp->cn_nameiop == NAMEI_RENAME) && | |
1153 | error == ENOENT) { | |
7ab77df6 | 1154 | if (!lockparent) { |
a11aaa81 | 1155 | vn_unlock(dvp); |
7ab77df6 MD |
1156 | cnp->cn_flags |= CNP_PDIRUNLOCK; |
1157 | } | |
984263bc MD |
1158 | if (dvp->v_mount->mnt_flag & MNT_RDONLY) |
1159 | error = EROFS; | |
1160 | else | |
1161 | error = EJUSTRETURN; | |
1162 | } | |
984263bc MD |
1163 | } |
1164 | return (error); | |
1165 | } | |
1166 | ||
1167 | /* | |
1168 | * nfs read call. | |
1169 | * Just call nfs_bioread() to do the work. | |
e851b29e CP |
1170 | * |
1171 | * nfs_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, | |
1172 | * struct ucred *a_cred) | |
984263bc MD |
1173 | */ |
1174 | static int | |
e851b29e | 1175 | nfs_read(struct vop_read_args *ap) |
984263bc | 1176 | { |
40393ded | 1177 | struct vnode *vp = ap->a_vp; |
984263bc | 1178 | |
3b568787 | 1179 | return (nfs_bioread(vp, ap->a_uio, ap->a_ioflag)); |
984263bc MD |
1180 | } |
1181 | ||
1182 | /* | |
1183 | * nfs readlink call | |
e851b29e CP |
1184 | * |
1185 | * nfs_readlink(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred) | |
984263bc MD |
1186 | */ |
1187 | static int | |
e851b29e | 1188 | nfs_readlink(struct vop_readlink_args *ap) |
984263bc | 1189 | { |
40393ded | 1190 | struct vnode *vp = ap->a_vp; |
984263bc MD |
1191 | |
1192 | if (vp->v_type != VLNK) | |
1193 | return (EINVAL); | |
3b568787 | 1194 | return (nfs_bioread(vp, ap->a_uio, 0)); |
984263bc MD |
1195 | } |
1196 | ||
1197 | /* | |
1198 | * Do a readlink rpc. | |
1199 | * Called by nfs_doio() from below the buffer cache. | |
1200 | */ | |
1201 | int | |
3b568787 | 1202 | nfs_readlinkrpc(struct vnode *vp, struct uio *uiop) |
984263bc | 1203 | { |
984263bc | 1204 | int error = 0, len, attrflag; |
42edf14f MD |
1205 | struct nfsm_info info; |
1206 | ||
1207 | info.mrep = NULL; | |
1208 | info.v3 = NFS_ISV3(vp); | |
984263bc MD |
1209 | |
1210 | nfsstats.rpccnt[NFSPROC_READLINK]++; | |
42edf14f MD |
1211 | nfsm_reqhead(&info, vp, NFSPROC_READLINK, NFSX_FH(info.v3)); |
1212 | ERROROUT(nfsm_fhtom(&info, vp)); | |
1213 | NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_READLINK, uiop->uio_td, | |
1214 | nfs_vpcred(vp, ND_CHECK), &error)); | |
1215 | if (info.v3) { | |
1216 | ERROROUT(nfsm_postop_attr(&info, vp, &attrflag, | |
1217 | NFS_LATTR_NOSHRINK)); | |
1218 | } | |
984263bc | 1219 | if (!error) { |
42edf14f | 1220 | NEGATIVEOUT(len = nfsm_strsiz(&info, NFS_MAXPATHLEN)); |
984263bc MD |
1221 | if (len == NFS_MAXPATHLEN) { |
1222 | struct nfsnode *np = VTONFS(vp); | |
1223 | if (np->n_size && np->n_size < NFS_MAXPATHLEN) | |
1224 | len = np->n_size; | |
1225 | } | |
42edf14f | 1226 | ERROROUT(nfsm_mtouio(&info, uiop, len)); |
984263bc | 1227 | } |
42edf14f MD |
1228 | m_freem(info.mrep); |
1229 | info.mrep = NULL; | |
6b08710e | 1230 | nfsmout: |
984263bc MD |
1231 | return (error); |
1232 | } | |
1233 | ||
1234 | /* | |
1235 | * nfs read rpc call | |
1236 | * Ditto above | |
1237 | */ | |
1238 | int | |
3b568787 | 1239 | nfs_readrpc(struct vnode *vp, struct uio *uiop) |
984263bc | 1240 | { |
40393ded | 1241 | u_int32_t *tl; |
984263bc MD |
1242 | struct nfsmount *nmp; |
1243 | int error = 0, len, retlen, tsiz, eof, attrflag; | |
42edf14f MD |
1244 | struct nfsm_info info; |
1245 | ||
1246 | info.mrep = NULL; | |
1247 | info.v3 = NFS_ISV3(vp); | |
984263bc MD |
1248 | |
1249 | #ifndef nolint | |
1250 | eof = 0; | |
1251 | #endif | |
1252 | nmp = VFSTONFS(vp->v_mount); | |
1253 | tsiz = uiop->uio_resid; | |
1254 | if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) | |
1255 | return (EFBIG); | |
1256 | while (tsiz > 0) { | |
1257 | nfsstats.rpccnt[NFSPROC_READ]++; | |
1258 | len = (tsiz > nmp->nm_rsize) ? nmp->nm_rsize : tsiz; | |
42edf14f MD |
1259 | nfsm_reqhead(&info, vp, NFSPROC_READ, |
1260 | NFSX_FH(info.v3) + NFSX_UNSIGNED * 3); | |
1261 | ERROROUT(nfsm_fhtom(&info, vp)); | |
1262 | tl = nfsm_build(&info, NFSX_UNSIGNED * 3); | |
1263 | if (info.v3) { | |
984263bc MD |
1264 | txdr_hyper(uiop->uio_offset, tl); |
1265 | *(tl + 2) = txdr_unsigned(len); | |
1266 | } else { | |
1267 | *tl++ = txdr_unsigned(uiop->uio_offset); | |
1268 | *tl++ = txdr_unsigned(len); | |
1269 | *tl = 0; | |
1270 | } | |
42edf14f MD |
1271 | NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_READ, uiop->uio_td, |
1272 | nfs_vpcred(vp, ND_READ), &error)); | |
1273 | if (info.v3) { | |
1274 | ERROROUT(nfsm_postop_attr(&info, vp, &attrflag, | |
1275 | NFS_LATTR_NOSHRINK)); | |
1276 | NULLOUT(tl = nfsm_dissect(&info, 2 * NFSX_UNSIGNED)); | |
984263bc | 1277 | eof = fxdr_unsigned(int, *(tl + 1)); |
42edf14f MD |
1278 | } else { |
1279 | ERROROUT(nfsm_loadattr(&info, vp, NULL)); | |
1280 | } | |
1281 | NEGATIVEOUT(retlen = nfsm_strsiz(&info, nmp->nm_rsize)); | |
1282 | ERROROUT(nfsm_mtouio(&info, uiop, retlen)); | |
1283 | m_freem(info.mrep); | |
1284 | info.mrep = NULL; | |
984263bc | 1285 | tsiz -= retlen; |
42edf14f | 1286 | if (info.v3) { |
984263bc MD |
1287 | if (eof || retlen == 0) { |
1288 | tsiz = 0; | |
1289 | } | |
1290 | } else if (retlen < len) { | |
1291 | tsiz = 0; | |
1292 | } | |
1293 | } | |
1294 | nfsmout: | |
1295 | return (error); | |
1296 | } | |
1297 | ||
1298 | /* | |
1299 | * nfs write call | |
1300 | */ | |
1301 | int | |
e851b29e | 1302 | nfs_writerpc(struct vnode *vp, struct uio *uiop, int *iomode, int *must_commit) |
984263bc | 1303 | { |
40393ded | 1304 | u_int32_t *tl; |
42edf14f | 1305 | int32_t backup; |
984263bc MD |
1306 | struct nfsmount *nmp = VFSTONFS(vp->v_mount); |
1307 | int error = 0, len, tsiz, wccflag = NFSV3_WCCRATTR, rlen, commit; | |
42edf14f MD |
1308 | int committed = NFSV3WRITE_FILESYNC; |
1309 | struct nfsm_info info; | |
1310 | ||
1311 | info.mrep = NULL; | |
1312 | info.v3 = NFS_ISV3(vp); | |
984263bc MD |
1313 | |
1314 | #ifndef DIAGNOSTIC | |
1315 | if (uiop->uio_iovcnt != 1) | |
1316 | panic("nfs: writerpc iovcnt > 1"); | |
1317 | #endif | |
1318 | *must_commit = 0; | |
1319 | tsiz = uiop->uio_resid; | |
1320 | if (uiop->uio_offset + tsiz > nmp->nm_maxfilesize) | |
1321 | return (EFBIG); | |
1322 | while (tsiz > 0) { | |
1323 | nfsstats.rpccnt[NFSPROC_WRITE]++; | |
1324 | len = (tsiz > nmp->nm_wsize) ? nmp->nm_wsize : tsiz; | |
42edf14f MD |
1325 | nfsm_reqhead(&info, vp, NFSPROC_WRITE, |
1326 | NFSX_FH(info.v3) + 5 * NFSX_UNSIGNED + nfsm_rndup(len)); | |
1327 | ERROROUT(nfsm_fhtom(&info, vp)); | |
1328 | if (info.v3) { | |
1329 | tl = nfsm_build(&info, 5 * NFSX_UNSIGNED); | |
984263bc MD |
1330 | txdr_hyper(uiop->uio_offset, tl); |
1331 | tl += 2; | |
1332 | *tl++ = txdr_unsigned(len); | |
1333 | *tl++ = txdr_unsigned(*iomode); | |
1334 | *tl = txdr_unsigned(len); | |
1335 | } else { | |
40393ded | 1336 | u_int32_t x; |
984263bc | 1337 | |
42edf14f | 1338 | tl = nfsm_build(&info, 4 * NFSX_UNSIGNED); |
984263bc MD |
1339 | /* Set both "begin" and "current" to non-garbage. */ |
1340 | x = txdr_unsigned((u_int32_t)uiop->uio_offset); | |
1341 | *tl++ = x; /* "begin offset" */ | |
1342 | *tl++ = x; /* "current offset" */ | |
1343 | x = txdr_unsigned(len); | |
1344 | *tl++ = x; /* total to this offset */ | |
1345 | *tl = x; /* size of this write */ | |
1346 | } | |
42edf14f MD |
1347 | ERROROUT(nfsm_uiotom(&info, uiop, len)); |
1348 | NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_WRITE, uiop->uio_td, | |
1349 | nfs_vpcred(vp, ND_WRITE), &error)); | |
1350 | if (info.v3) { | |
5a9187cb MD |
1351 | /* |
1352 | * The write RPC returns a before and after mtime. The | |
1353 | * nfsm_wcc_data() macro checks the before n_mtime | |
1354 | * against the before time and stores the after time | |
1355 | * in the nfsnode's cached vattr and n_mtime field. | |
1356 | * The NRMODIFIED bit will be set if the before | |
1357 | * time did not match the original mtime. | |
1358 | */ | |
984263bc | 1359 | wccflag = NFSV3_WCCCHK; |
42edf14f MD |
1360 | ERROROUT(nfsm_wcc_data(&info, vp, &wccflag)); |
1361 | if (error == 0) { | |
1362 | NULLOUT(tl = nfsm_dissect(&info, 2 * NFSX_UNSIGNED + NFSX_V3WRITEVERF)); | |
984263bc MD |
1363 | rlen = fxdr_unsigned(int, *tl++); |
1364 | if (rlen == 0) { | |
1365 | error = NFSERR_IO; | |
42edf14f MD |
1366 | m_freem(info.mrep); |
1367 | info.mrep = NULL; | |
984263bc MD |
1368 | break; |
1369 | } else if (rlen < len) { | |
1370 | backup = len - rlen; | |
656849c6 | 1371 | uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base - backup; |
984263bc MD |
1372 | uiop->uio_iov->iov_len += backup; |
1373 | uiop->uio_offset -= backup; | |
1374 | uiop->uio_resid += backup; | |
1375 | len = rlen; | |
1376 | } | |
1377 | commit = fxdr_unsigned(int, *tl++); | |
1378 | ||
1379 | /* | |
1380 | * Return the lowest committment level | |
1381 | * obtained by any of the RPCs. | |
1382 | */ | |
1383 | if (committed == NFSV3WRITE_FILESYNC) | |
1384 | committed = commit; | |
1385 | else if (committed == NFSV3WRITE_DATASYNC && | |
1386 | commit == NFSV3WRITE_UNSTABLE) | |
1387 | committed = commit; | |
1388 | if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0){ | |
1389 | bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf, | |
1390 | NFSX_V3WRITEVERF); | |
1391 | nmp->nm_state |= NFSSTA_HASWRITEVERF; | |
1392 | } else if (bcmp((caddr_t)tl, | |
1393 | (caddr_t)nmp->nm_verf, NFSX_V3WRITEVERF)) { | |
1394 | *must_commit = 1; | |
1395 | bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf, | |
1396 | NFSX_V3WRITEVERF); | |
1397 | } | |
1398 | } | |
5a9187cb | 1399 | } else { |
42edf14f | 1400 | ERROROUT(nfsm_loadattr(&info, vp, NULL)); |
5a9187cb | 1401 | } |
42edf14f MD |
1402 | m_freem(info.mrep); |
1403 | info.mrep = NULL; | |
984263bc MD |
1404 | if (error) |
1405 | break; | |
1406 | tsiz -= len; | |
1407 | } | |
1408 | nfsmout: | |
1409 | if (vp->v_mount->mnt_flag & MNT_ASYNC) | |
1410 | committed = NFSV3WRITE_FILESYNC; | |
1411 | *iomode = committed; | |
1412 | if (error) | |
1413 | uiop->uio_resid = tsiz; | |
1414 | return (error); | |
1415 | } | |
1416 | ||
1417 | /* | |
1418 | * nfs mknod rpc | |
1419 | * For NFS v2 this is a kludge. Use a create rpc but with the IFMT bits of the | |
1420 | * mode set to specify the file type and the size field for rdev. | |
1421 | */ | |
1422 | static int | |
e851b29e CP |
1423 | nfs_mknodrpc(struct vnode *dvp, struct vnode **vpp, struct componentname *cnp, |
1424 | struct vattr *vap) | |
984263bc | 1425 | { |
40393ded RG |
1426 | struct nfsv2_sattr *sp; |
1427 | u_int32_t *tl; | |
60233e58 SW |
1428 | struct vnode *newvp = NULL; |
1429 | struct nfsnode *np = NULL; | |
984263bc | 1430 | struct vattr vattr; |
984263bc | 1431 | int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0; |
0e9b9130 | 1432 | int rmajor, rminor; |
42edf14f MD |
1433 | struct nfsm_info info; |
1434 | ||
1435 | info.mrep = NULL; | |
1436 | info.v3 = NFS_ISV3(dvp); | |
984263bc | 1437 | |
0e9b9130 MD |
1438 | if (vap->va_type == VCHR || vap->va_type == VBLK) { |
1439 | rmajor = txdr_unsigned(vap->va_rmajor); | |
1440 | rminor = txdr_unsigned(vap->va_rminor); | |
1441 | } else if (vap->va_type == VFIFO || vap->va_type == VSOCK) { | |
1442 | rmajor = nfs_xdrneg1; | |
1443 | rminor = nfs_xdrneg1; | |
1444 | } else { | |
984263bc MD |
1445 | return (EOPNOTSUPP); |
1446 | } | |
87de5057 | 1447 | if ((error = VOP_GETATTR(dvp, &vattr)) != 0) { |
984263bc MD |
1448 | return (error); |
1449 | } | |
1450 | nfsstats.rpccnt[NFSPROC_MKNOD]++; | |
42edf14f MD |
1451 | nfsm_reqhead(&info, dvp, NFSPROC_MKNOD, |
1452 | NFSX_FH(info.v3) + 4 * NFSX_UNSIGNED + | |
1453 | nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(info.v3)); | |
1454 | ERROROUT(nfsm_fhtom(&info, dvp)); | |
1455 | ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, cnp->cn_namelen, | |
1456 | NFS_MAXNAMLEN)); | |
1457 | if (info.v3) { | |
1458 | tl = nfsm_build(&info, NFSX_UNSIGNED); | |
984263bc | 1459 | *tl++ = vtonfsv3_type(vap->va_type); |
42edf14f | 1460 | nfsm_v3attrbuild(&info, vap, FALSE); |
984263bc | 1461 | if (vap->va_type == VCHR || vap->va_type == VBLK) { |
42edf14f | 1462 | tl = nfsm_build(&info, 2 * NFSX_UNSIGNED); |
0e9b9130 MD |
1463 | *tl++ = txdr_unsigned(vap->va_rmajor); |
1464 | *tl = txdr_unsigned(vap->va_rminor); | |
984263bc MD |
1465 | } |
1466 | } else { | |
42edf14f | 1467 | sp = nfsm_build(&info, NFSX_V2SATTR); |
984263bc MD |
1468 | sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); |
1469 | sp->sa_uid = nfs_xdrneg1; | |
1470 | sp->sa_gid = nfs_xdrneg1; | |
0e9b9130 | 1471 | sp->sa_size = makeudev(rmajor, rminor); |
984263bc MD |
1472 | txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); |
1473 | txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); | |
1474 | } | |
42edf14f MD |
1475 | NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_MKNOD, cnp->cn_td, |
1476 | cnp->cn_cred, &error)); | |
984263bc | 1477 | if (!error) { |
42edf14f | 1478 | ERROROUT(nfsm_mtofh(&info, dvp, &newvp, &gotvp)); |
984263bc MD |
1479 | if (!gotvp) { |
1480 | if (newvp) { | |
1481 | vput(newvp); | |
60233e58 | 1482 | newvp = NULL; |
984263bc MD |
1483 | } |
1484 | error = nfs_lookitup(dvp, cnp->cn_nameptr, | |
dadab5e9 | 1485 | cnp->cn_namelen, cnp->cn_cred, cnp->cn_td, &np); |
984263bc MD |
1486 | if (!error) |
1487 | newvp = NFSTOV(np); | |
1488 | } | |
1489 | } | |
42edf14f MD |
1490 | if (info.v3) { |
1491 | ERROROUT(nfsm_wcc_data(&info, dvp, &wccflag)); | |
1492 | } | |
1493 | m_freem(info.mrep); | |
1494 | info.mrep = NULL; | |
6b08710e | 1495 | nfsmout: |
984263bc MD |
1496 | if (error) { |
1497 | if (newvp) | |
1498 | vput(newvp); | |
1499 | } else { | |
984263bc MD |
1500 | *vpp = newvp; |
1501 | } | |
5a9187cb | 1502 | VTONFS(dvp)->n_flag |= NLMODIFIED; |
984263bc MD |
1503 | if (!wccflag) |
1504 | VTONFS(dvp)->n_attrstamp = 0; | |
1505 | return (error); | |
1506 | } | |
1507 | ||
1508 | /* | |
1509 | * nfs mknod vop | |
1510 | * just call nfs_mknodrpc() to do the work. | |
e851b29e CP |
1511 | * |
1512 | * nfs_mknod(struct vnode *a_dvp, struct vnode **a_vpp, | |
1513 | * struct componentname *a_cnp, struct vattr *a_vap) | |
984263bc MD |
1514 | */ |
1515 | /* ARGSUSED */ | |
1516 | static int | |
e62afb5f | 1517 | nfs_mknod(struct vop_old_mknod_args *ap) |
984263bc MD |
1518 | { |
1519 | return nfs_mknodrpc(ap->a_dvp, ap->a_vpp, ap->a_cnp, ap->a_vap); | |
1520 | } | |
1521 | ||
1522 | static u_long create_verf; | |
1523 | /* | |
1524 | * nfs file create call | |
e851b29e CP |
1525 | * |
1526 | * nfs_create(struct vnode *a_dvp, struct vnode **a_vpp, | |
1527 | * struct componentname *a_cnp, struct vattr *a_vap) | |
984263bc MD |
1528 | */ |
1529 | static int | |
e62afb5f | 1530 | nfs_create(struct vop_old_create_args *ap) |
984263bc | 1531 | { |
40393ded RG |
1532 | struct vnode *dvp = ap->a_dvp; |
1533 | struct vattr *vap = ap->a_vap; | |
1534 | struct componentname *cnp = ap->a_cnp; | |
1535 | struct nfsv2_sattr *sp; | |
1536 | u_int32_t *tl; | |
60233e58 SW |
1537 | struct nfsnode *np = NULL; |
1538 | struct vnode *newvp = NULL; | |
984263bc | 1539 | int error = 0, wccflag = NFSV3_WCCRATTR, gotvp = 0, fmode = 0; |
984263bc | 1540 | struct vattr vattr; |
42edf14f MD |
1541 | struct nfsm_info info; |
1542 | ||
1543 | info.mrep = NULL; | |
1544 | info.v3 = NFS_ISV3(dvp); | |
984263bc MD |
1545 | |
1546 | /* | |
1547 | * Oops, not for me.. | |
1548 | */ | |
1549 | if (vap->va_type == VSOCK) | |
1550 | return (nfs_mknodrpc(dvp, ap->a_vpp, cnp, vap)); | |
1551 | ||
87de5057 | 1552 | if ((error = VOP_GETATTR(dvp, &vattr)) != 0) { |
984263bc MD |
1553 | return (error); |
1554 | } | |
1555 | if (vap->va_vaflags & VA_EXCLUSIVE) | |
1556 | fmode |= O_EXCL; | |
1557 | again: | |
1558 | nfsstats.rpccnt[NFSPROC_CREATE]++; | |
42edf14f MD |
1559 | nfsm_reqhead(&info, dvp, NFSPROC_CREATE, |
1560 | NFSX_FH(info.v3) + 2 * NFSX_UNSIGNED + | |
1561 | nfsm_rndup(cnp->cn_namelen) + NFSX_SATTR(info.v3)); | |
1562 | ERROROUT(nfsm_fhtom(&info, dvp)); | |
1563 | ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, cnp->cn_namelen, | |
1564 | NFS_MAXNAMLEN)); | |
1565 | if (info.v3) { | |
1566 | tl = nfsm_build(&info, NFSX_UNSIGNED); | |
984263bc MD |
1567 | if (fmode & O_EXCL) { |
1568 | *tl = txdr_unsigned(NFSV3CREATE_EXCLUSIVE); | |
42edf14f | 1569 | tl = nfsm_build(&info, NFSX_V3CREATEVERF); |
984263bc | 1570 | #ifdef INET |
1b562c24 SZ |
1571 | if (!TAILQ_EMPTY(&in_ifaddrheads[mycpuid])) |
1572 | *tl++ = IA_SIN(TAILQ_FIRST(&in_ifaddrheads[mycpuid])->ia)->sin_addr.s_addr; | |
984263bc MD |
1573 | else |
1574 | #endif | |
1575 | *tl++ = create_verf; | |
1576 | *tl = ++create_verf; | |
1577 | } else { | |
1578 | *tl = txdr_unsigned(NFSV3CREATE_UNCHECKED); | |
42edf14f | 1579 | nfsm_v3attrbuild(&info, vap, FALSE); |
984263bc MD |
1580 | } |
1581 | } else { | |
42edf14f | 1582 | sp = nfsm_build(&info, NFSX_V2SATTR); |
984263bc MD |
1583 | sp->sa_mode = vtonfsv2_mode(vap->va_type, vap->va_mode); |
1584 | sp->sa_uid = nfs_xdrneg1; | |
1585 | sp->sa_gid = nfs_xdrneg1; | |
1586 | sp->sa_size = 0; | |
1587 | txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); | |
1588 | txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); | |
1589 | } | |
42edf14f MD |
1590 | NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_CREATE, cnp->cn_td, |
1591 | cnp->cn_cred, &error)); | |
1592 | if (error == 0) { | |
1593 | ERROROUT(nfsm_mtofh(&info, dvp, &newvp, &gotvp)); | |
984263bc MD |
1594 | if (!gotvp) { |
1595 | if (newvp) { | |
1596 | vput(newvp); | |
60233e58 | 1597 | newvp = NULL; |
984263bc MD |
1598 | } |
1599 | error = nfs_lookitup(dvp, cnp->cn_nameptr, | |
dadab5e9 | 1600 | cnp->cn_namelen, cnp->cn_cred, cnp->cn_td, &np); |
984263bc MD |
1601 | if (!error) |
1602 | newvp = NFSTOV(np); | |
1603 | } | |
1604 | } | |
42edf14f MD |
1605 | if (info.v3) { |
1606 | ERROROUT(nfsm_wcc_data(&info, dvp, &wccflag)); | |
1607 | } | |
1608 | m_freem(info.mrep); | |
1609 | info.mrep = NULL; | |
6b08710e | 1610 | nfsmout: |
984263bc | 1611 | if (error) { |
42edf14f | 1612 | if (info.v3 && (fmode & O_EXCL) && error == NFSERR_NOTSUPP) { |
c5c4cc5d | 1613 | KKASSERT(newvp == NULL); |
984263bc MD |
1614 | fmode &= ~O_EXCL; |
1615 | goto again; | |
1616 | } | |
42edf14f | 1617 | } else if (info.v3 && (fmode & O_EXCL)) { |
984263bc MD |
1618 | /* |
1619 | * We are normally called with only a partially initialized | |
1620 | * VAP. Since the NFSv3 spec says that server may use the | |
1621 | * file attributes to store the verifier, the spec requires | |
1622 | * us to do a SETATTR RPC. FreeBSD servers store the verifier | |
1623 | * in atime, but we can't really assume that all servers will | |
1624 | * so we ensure that our SETATTR sets both atime and mtime. | |
1625 | */ | |
1626 | if (vap->va_mtime.tv_sec == VNOVAL) | |
1627 | vfs_timestamp(&vap->va_mtime); | |
1628 | if (vap->va_atime.tv_sec == VNOVAL) | |
1629 | vap->va_atime = vap->va_mtime; | |
dadab5e9 | 1630 | error = nfs_setattrrpc(newvp, vap, cnp->cn_cred, cnp->cn_td); |
984263bc | 1631 | } |
c5c4cc5d | 1632 | if (error == 0) { |
c1cf1e59 MD |
1633 | /* |
1634 | * The new np may have enough info for access | |
1635 | * checks, make sure rucred and wucred are | |
1636 | * initialized for read and write rpc's. | |
1637 | */ | |
1638 | np = VTONFS(newvp); | |
1639 | if (np->n_rucred == NULL) | |
1640 | np->n_rucred = crhold(cnp->cn_cred); | |
1641 | if (np->n_wucred == NULL) | |
1642 | np->n_wucred = crhold(cnp->cn_cred); | |
984263bc | 1643 | *ap->a_vpp = newvp; |
c5c4cc5d MD |
1644 | } else if (newvp) { |
1645 | vput(newvp); | |
984263bc | 1646 | } |
5a9187cb | 1647 | VTONFS(dvp)->n_flag |= NLMODIFIED; |
984263bc MD |
1648 | if (!wccflag) |
1649 | VTONFS(dvp)->n_attrstamp = 0; | |
1650 | return (error); | |
1651 | } | |
1652 | ||
1653 | /* | |
1654 | * nfs file remove call | |
1655 | * To try and make nfs semantics closer to ufs semantics, a file that has | |
1656 | * other processes using the vnode is renamed instead of removed and then | |
1657 | * removed later on the last close. | |
3c37c940 | 1658 | * - If v_sysref.refcnt > 1 |
984263bc MD |
1659 | * If a rename is not already in the works |
1660 | * call nfs_sillyrename() to set it up | |
1661 | * else | |
1662 | * do the remove rpc | |
e851b29e | 1663 | * |
31bd717a MD |
1664 | * nfs_remove(struct vnode *a_dvp, struct vnode *a_vp, |
1665 | * struct componentname *a_cnp) | |
984263bc MD |
1666 | */ |
1667 | static int | |
e62afb5f | 1668 | nfs_remove(struct vop_old_remove_args *ap) |
984263bc | 1669 | { |
40393ded RG |
1670 | struct vnode *vp = ap->a_vp; |
1671 | struct vnode *dvp = ap->a_dvp; | |
1672 | struct componentname *cnp = ap->a_cnp; | |
1673 | struct nfsnode *np = VTONFS(vp); | |
984263bc MD |
1674 | int error = 0; |
1675 | struct vattr vattr; | |
1676 | ||
1677 | #ifndef DIAGNOSTIC | |
3c37c940 MD |
1678 | if (vp->v_sysref.refcnt < 1) |
1679 | panic("nfs_remove: bad v_sysref.refcnt"); | |
984263bc MD |
1680 | #endif |
1681 | if (vp->v_type == VDIR) | |
1682 | error = EPERM; | |
3c37c940 | 1683 | else if (vp->v_sysref.refcnt == 1 || (np->n_sillyrename && |
87de5057 | 1684 | VOP_GETATTR(vp, &vattr) == 0 && |
984263bc | 1685 | vattr.va_nlink > 1)) { |
984263bc MD |
1686 | /* |
1687 | * throw away biocache buffers, mainly to avoid | |
1688 | * unnecessary delayed writes later. | |
1689 | */ | |
87de5057 | 1690 | error = nfs_vinvalbuf(vp, 0, 1); |
984263bc MD |
1691 | /* Do the rpc */ |
1692 | if (error != EINTR) | |
1693 | error = nfs_removerpc(dvp, cnp->cn_nameptr, | |
dadab5e9 | 1694 | cnp->cn_namelen, cnp->cn_cred, cnp->cn_td); |
984263bc MD |
1695 | /* |
1696 | * Kludge City: If the first reply to the remove rpc is lost.. | |
1697 | * the reply to the retransmitted request will be ENOENT | |
1698 | * since the file was in fact removed | |
1699 | * Therefore, we cheat and return success. | |
1700 | */ | |
1701 | if (error == ENOENT) | |
1702 | error = 0; | |
fad57d0e | 1703 | } else if (!np->n_sillyrename) { |
984263bc | 1704 | error = nfs_sillyrename(dvp, vp, cnp); |
fad57d0e | 1705 | } |
984263bc MD |
1706 | np->n_attrstamp = 0; |
1707 | return (error); | |
1708 | } | |
1709 | ||
1710 | /* | |
1711 | * nfs file remove rpc called from nfs_inactive | |
1712 | */ | |
1713 | int | |
dadab5e9 | 1714 | nfs_removeit(struct sillyrename *sp) |
984263bc | 1715 | { |
dadab5e9 MD |
1716 | return (nfs_removerpc(sp->s_dvp, sp->s_name, sp->s_namlen, |
1717 | sp->s_cred, NULL)); | |
984263bc MD |
1718 | } |
1719 | ||
1720 | /* | |
1721 | * Nfs remove rpc, called from nfs_remove() and nfs_removeit(). | |
1722 | */ | |
1723 | static int | |
e851b29e CP |
1724 | nfs_removerpc(struct vnode *dvp, const char *name, int namelen, |
1725 | struct ucred *cred, struct thread *td) | |
984263bc | 1726 | { |
984263bc | 1727 | int error = 0, wccflag = NFSV3_WCCRATTR; |
42edf14f MD |
1728 | struct nfsm_info info; |
1729 | ||
1730 | info.mrep = NULL; | |
1731 | info.v3 = NFS_ISV3(dvp); | |
984263bc MD |
1732 | |
1733 | nfsstats.rpccnt[NFSPROC_REMOVE]++; | |
42edf14f MD |
1734 | nfsm_reqhead(&info, dvp, NFSPROC_REMOVE, |
1735 | NFSX_FH(info.v3) + NFSX_UNSIGNED + nfsm_rndup(namelen)); | |
1736 | ERROROUT(nfsm_fhtom(&info, dvp)); | |
1737 | ERROROUT(nfsm_strtom(&info, name, namelen, NFS_MAXNAMLEN)); | |
1738 | NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_REMOVE, td, cred, &error)); | |
1739 | if (info.v3) { | |
1740 | ERROROUT(nfsm_wcc_data(&info, dvp, &wccflag)); | |
1741 | } | |
1742 | m_freem(info.mrep); | |
1743 | info.mrep = NULL; | |
6b08710e | 1744 | nfsmout: |
5a9187cb | 1745 | VTONFS(dvp)->n_flag |= NLMODIFIED; |
984263bc MD |
1746 | if (!wccflag) |
1747 | VTONFS(dvp)->n_attrstamp = 0; | |
1748 | return (error); | |
1749 | } | |
1750 | ||
1751 | /* | |
1752 | * nfs file rename call | |
e851b29e CP |
1753 | * |
1754 | * nfs_rename(struct vnode *a_fdvp, struct vnode *a_fvp, | |
1755 | * struct componentname *a_fcnp, struct vnode *a_tdvp, | |
1756 | * struct vnode *a_tvp, struct componentname *a_tcnp) | |
984263bc MD |
1757 | */ |
1758 | static int | |
e62afb5f | 1759 | nfs_rename(struct vop_old_rename_args *ap) |
984263bc | 1760 | { |
40393ded RG |
1761 | struct vnode *fvp = ap->a_fvp; |
1762 | struct vnode *tvp = ap->a_tvp; | |
1763 | struct vnode *fdvp = ap->a_fdvp; | |
1764 | struct vnode *tdvp = ap->a_tdvp; | |
1765 | struct componentname *tcnp = ap->a_tcnp; | |
1766 | struct componentname *fcnp = ap->a_fcnp; | |
984263bc MD |
1767 | int error; |
1768 | ||
984263bc MD |
1769 | /* Check for cross-device rename */ |
1770 | if ((fvp->v_mount != tdvp->v_mount) || | |
1771 | (tvp && (fvp->v_mount != tvp->v_mount))) { | |
1772 | error = EXDEV; | |
1773 | goto out; | |
1774 | } | |
1775 | ||
1776 | /* | |
bb7bf7b2 MD |
1777 | * We shouldn't have to flush fvp on rename for most server-side |
1778 | * filesystems as the file handle should not change. Unfortunately | |
1779 | * the inode for some filesystems (msdosfs) might be tied to the | |
1780 | * file name or directory position so to be completely safe | |
1781 | * vfs.nfs.flush_on_rename is set by default. Clear to improve | |
1782 | * performance. | |
a482a28a MD |
1783 | * |
1784 | * We must flush tvp on rename because it might become stale on the | |
1785 | * server after the rename. | |
984263bc | 1786 | */ |
a482a28a MD |
1787 | if (nfs_flush_on_rename) |
1788 | VOP_FSYNC(fvp, MNT_WAIT); | |
984263bc | 1789 | if (tvp) |
87de5057 | 1790 | VOP_FSYNC(tvp, MNT_WAIT); |
984263bc MD |
1791 | |
1792 | /* | |
1793 | * If the tvp exists and is in use, sillyrename it before doing the | |
1794 | * rename of the new file over it. | |
fad57d0e | 1795 | * |
984263bc | 1796 | * XXX Can't sillyrename a directory. |
5fd012e0 | 1797 | * |
fad57d0e MD |
1798 | * We do not attempt to do any namecache purges in this old API |
1799 | * routine. The new API compat functions have access to the actual | |
1800 | * namecache structures and will do it for us. | |
984263bc | 1801 | */ |
3c37c940 | 1802 | if (tvp && tvp->v_sysref.refcnt > 1 && !VTONFS(tvp)->n_sillyrename && |
984263bc MD |
1803 | tvp->v_type != VDIR && !nfs_sillyrename(tdvp, tvp, tcnp)) { |
1804 | vput(tvp); | |
1805 | tvp = NULL; | |
5fd012e0 | 1806 | } else if (tvp) { |
fad57d0e | 1807 | ; |
984263bc MD |
1808 | } |
1809 | ||
1810 | error = nfs_renamerpc(fdvp, fcnp->cn_nameptr, fcnp->cn_namelen, | |
1811 | tdvp, tcnp->cn_nameptr, tcnp->cn_namelen, tcnp->cn_cred, | |
dadab5e9 | 1812 | tcnp->cn_td); |
984263bc | 1813 | |
984263bc MD |
1814 | out: |
1815 | if (tdvp == tvp) | |
1816 | vrele(tdvp); | |
1817 | else | |
1818 | vput(tdvp); | |
1819 | if (tvp) | |
1820 | vput(tvp); | |
1821 | vrele(fdvp); | |
1822 | vrele(fvp); | |
1823 | /* | |
1824 | * Kludge: Map ENOENT => 0 assuming that it is a reply to a retry. | |
1825 | */ | |
1826 | if (error == ENOENT) | |
1827 | error = 0; | |
1828 | return (error); | |
1829 | } | |
1830 | ||
1831 | /* | |
1832 | * nfs file rename rpc called from nfs_remove() above | |
1833 | */ | |
1834 | static int | |
e851b29e CP |
1835 | nfs_renameit(struct vnode *sdvp, struct componentname *scnp, |
1836 | struct sillyrename *sp) | |
984263bc MD |
1837 | { |
1838 | return (nfs_renamerpc(sdvp, scnp->cn_nameptr, scnp->cn_namelen, | |
dadab5e9 | 1839 | sdvp, sp->s_name, sp->s_namlen, scnp->cn_cred, scnp->cn_td)); |
984263bc MD |
1840 | } |
1841 | ||
1842 | /* | |
1843 | * Do an nfs rename rpc. Called from nfs_rename() and nfs_renameit(). | |
1844 | */ | |
1845 | static int | |
e851b29e CP |
1846 | nfs_renamerpc(struct vnode *fdvp, const char *fnameptr, int fnamelen, |
1847 | struct vnode *tdvp, const char *tnameptr, int tnamelen, | |
1848 | struct ucred *cred, struct thread *td) | |
984263bc | 1849 | { |
984263bc | 1850 | int error = 0, fwccflag = NFSV3_WCCRATTR, twccflag = NFSV3_WCCRATTR; |
42edf14f MD |
1851 | struct nfsm_info info; |
1852 | ||
1853 | info.mrep = NULL; | |
1854 | info.v3 = NFS_ISV3(fdvp); | |
984263bc MD |
1855 | |
1856 | nfsstats.rpccnt[NFSPROC_RENAME]++; | |
42edf14f MD |
1857 | nfsm_reqhead(&info, fdvp, NFSPROC_RENAME, |
1858 | (NFSX_FH(info.v3) + NFSX_UNSIGNED)*2 + | |
1859 | nfsm_rndup(fnamelen) + nfsm_rndup(tnamelen)); | |
1860 | ERROROUT(nfsm_fhtom(&info, fdvp)); | |
1861 | ERROROUT(nfsm_strtom(&info, fnameptr, fnamelen, NFS_MAXNAMLEN)); | |
1862 | ERROROUT(nfsm_fhtom(&info, tdvp)); | |
1863 | ERROROUT(nfsm_strtom(&info, tnameptr, tnamelen, NFS_MAXNAMLEN)); | |
1864 | NEGKEEPOUT(nfsm_request(&info, fdvp, NFSPROC_RENAME, td, cred, &error)); | |
1865 | if (info.v3) { | |
1866 | ERROROUT(nfsm_wcc_data(&info, fdvp, &fwccflag)); | |
1867 | ERROROUT(nfsm_wcc_data(&info, tdvp, &twccflag)); | |
1868 | } | |
1869 | m_freem(info.mrep); | |
1870 | info.mrep = NULL; | |
6b08710e | 1871 | nfsmout: |
5a9187cb MD |
1872 | VTONFS(fdvp)->n_flag |= NLMODIFIED; |
1873 | VTONFS(tdvp)->n_flag |= NLMODIFIED; | |
984263bc MD |
1874 | if (!fwccflag) |
1875 | VTONFS(fdvp)->n_attrstamp = 0; | |
1876 | if (!twccflag) | |
1877 | VTONFS(tdvp)->n_attrstamp = 0; | |
1878 | return (error); | |
1879 | } | |
1880 | ||
1881 | /* | |
1882 | * nfs hard link create call | |
e851b29e CP |
1883 | * |
1884 | * nfs_link(struct vnode *a_tdvp, struct vnode *a_vp, | |
1885 | * struct componentname *a_cnp) | |
984263bc MD |
1886 | */ |
1887 | static int | |
e62afb5f | 1888 | nfs_link(struct vop_old_link_args *ap) |
984263bc | 1889 | { |
40393ded RG |
1890 | struct vnode *vp = ap->a_vp; |
1891 | struct vnode *tdvp = ap->a_tdvp; | |
1892 | struct componentname *cnp = ap->a_cnp; | |
984263bc | 1893 | int error = 0, wccflag = NFSV3_WCCRATTR, attrflag = 0; |
42edf14f | 1894 | struct nfsm_info info; |
984263bc MD |
1895 | |
1896 | if (vp->v_mount != tdvp->v_mount) { | |
1897 | return (EXDEV); | |
1898 | } | |
1899 | ||
1900 | /* | |
bb7bf7b2 MD |
1901 | * The attribute cache may get out of sync with the server on link. |
1902 | * Pushing writes to the server before handle was inherited from | |
1903 | * long long ago and it is unclear if we still need to do this. | |
1904 | * Defaults to off. | |
984263bc | 1905 | */ |
bb7bf7b2 MD |
1906 | if (nfs_flush_on_hlink) |
1907 | VOP_FSYNC(vp, MNT_WAIT); | |
984263bc | 1908 | |
42edf14f MD |
1909 | info.mrep = NULL; |
1910 | info.v3 = NFS_ISV3(vp); | |
1911 | ||
984263bc | 1912 | nfsstats.rpccnt[NFSPROC_LINK]++; |
42edf14f MD |
1913 | nfsm_reqhead(&info, vp, NFSPROC_LINK, |
1914 | NFSX_FH(info.v3) * 2 + NFSX_UNSIGNED + | |
1915 | nfsm_rndup(cnp->cn_namelen)); | |
1916 | ERROROUT(nfsm_fhtom(&info, vp)); | |
1917 | ERROROUT(nfsm_fhtom(&info, tdvp)); | |
1918 | ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, cnp->cn_namelen, | |
1919 | NFS_MAXNAMLEN)); | |
1920 | NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_LINK, cnp->cn_td, | |
1921 | cnp->cn_cred, &error)); | |
1922 | if (info.v3) { | |
1923 | ERROROUT(nfsm_postop_attr(&info, vp, &attrflag, | |
1924 | NFS_LATTR_NOSHRINK)); | |
1925 | ERROROUT(nfsm_wcc_data(&info, tdvp, &wccflag)); | |
1926 | } | |
1927 | m_freem(info.mrep); | |
1928 | info.mrep = NULL; | |
6b08710e | 1929 | nfsmout: |
5a9187cb | 1930 | VTONFS(tdvp)->n_flag |= NLMODIFIED; |
984263bc MD |
1931 | if (!attrflag) |
1932 | VTONFS(vp)->n_attrstamp = 0; | |
1933 | if (!wccflag) | |
1934 | VTONFS(tdvp)->n_attrstamp = 0; | |
1935 | /* | |
1936 | * Kludge: Map EEXIST => 0 assuming that it is a reply to a retry. | |
1937 | */ | |
1938 | if (error == EEXIST) | |
1939 | error = 0; | |
1940 | return (error); | |
1941 | } | |
1942 | ||
1943 | /* | |
1944 | * nfs symbolic link create call | |
e851b29e CP |
1945 | * |
1946 | * nfs_symlink(struct vnode *a_dvp, struct vnode **a_vpp, | |
1947 | * struct componentname *a_cnp, struct vattr *a_vap, | |
1948 | * char *a_target) | |
984263bc MD |
1949 | */ |
1950 | static int | |
e62afb5f | 1951 | nfs_symlink(struct vop_old_symlink_args *ap) |
984263bc | 1952 | { |
40393ded RG |
1953 | struct vnode *dvp = ap->a_dvp; |
1954 | struct vattr *vap = ap->a_vap; | |
1955 | struct componentname *cnp = ap->a_cnp; | |
1956 | struct nfsv2_sattr *sp; | |
984263bc | 1957 | int slen, error = 0, wccflag = NFSV3_WCCRATTR, gotvp; |
60233e58 | 1958 | struct vnode *newvp = NULL; |
42edf14f MD |
1959 | struct nfsm_info info; |
1960 | ||
1961 | info.mrep = NULL; | |
1962 | info.v3 = NFS_ISV3(dvp); | |
984263bc MD |
1963 | |
1964 | nfsstats.rpccnt[NFSPROC_SYMLINK]++; | |
1965 | slen = strlen(ap->a_target); | |
42edf14f MD |
1966 | nfsm_reqhead(&info, dvp, NFSPROC_SYMLINK, |
1967 | NFSX_FH(info.v3) + 2*NFSX_UNSIGNED + | |
1968 | nfsm_rndup(cnp->cn_namelen) + | |
1969 | nfsm_rndup(slen) + NFSX_SATTR(info.v3)); | |
1970 | ERROROUT(nfsm_fhtom(&info, dvp)); | |
1971 | ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, cnp->cn_namelen, | |
1972 | NFS_MAXNAMLEN)); | |
1973 | if (info.v3) { | |
1974 | nfsm_v3attrbuild(&info, vap, FALSE); | |
1975 | } | |
1976 | ERROROUT(nfsm_strtom(&info, ap->a_target, slen, NFS_MAXPATHLEN)); | |
1977 | if (info.v3 == 0) { | |
1978 | sp = nfsm_build(&info, NFSX_V2SATTR); | |
984263bc MD |
1979 | sp->sa_mode = vtonfsv2_mode(VLNK, vap->va_mode); |
1980 | sp->sa_uid = nfs_xdrneg1; | |
1981 | sp->sa_gid = nfs_xdrneg1; | |
1982 | sp->sa_size = nfs_xdrneg1; | |
1983 | txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); | |
1984 | txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); | |
1985 | } | |
1986 | ||
1987 | /* | |
1988 | * Issue the NFS request and get the rpc response. | |
1989 | * | |
1990 | * Only NFSv3 responses returning an error of 0 actually return | |
1991 | * a file handle that can be converted into newvp without having | |
1992 | * to do an extra lookup rpc. | |
1993 | */ | |
42edf14f MD |
1994 | NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_SYMLINK, cnp->cn_td, |
1995 | cnp->cn_cred, &error)); | |
1996 | if (info.v3) { | |
1997 | if (error == 0) { | |
1998 | ERROROUT(nfsm_mtofh(&info, dvp, &newvp, &gotvp)); | |
1999 | } | |
2000 | ERROROUT(nfsm_wcc_data(&info, dvp, &wccflag)); | |
984263bc MD |
2001 | } |
2002 | ||
2003 | /* | |
2004 | * out code jumps -> here, mrep is also freed. | |
2005 | */ | |
2006 | ||
42edf14f MD |
2007 | m_freem(info.mrep); |
2008 | info.mrep = NULL; | |
6b08710e | 2009 | nfsmout: |
984263bc MD |
2010 | |
2011 | /* | |
2012 | * If we get an EEXIST error, silently convert it to no-error | |
2013 | * in case of an NFS retry. | |
2014 | */ | |
2015 | if (error == EEXIST) | |
2016 | error = 0; | |
2017 | ||
2018 | /* | |
2019 | * If we do not have (or no longer have) an error, and we could | |
2020 | * not extract the newvp from the response due to the request being | |
2021 | * NFSv2 or the error being EEXIST. We have to do a lookup in order | |
2022 | * to obtain a newvp to return. | |
2023 | */ | |
2024 | if (error == 0 && newvp == NULL) { | |
2025 | struct nfsnode *np = NULL; | |
2026 | ||
2027 | error = nfs_lookitup(dvp, cnp->cn_nameptr, cnp->cn_namelen, | |
dadab5e9 | 2028 | cnp->cn_cred, cnp->cn_td, &np); |
984263bc MD |
2029 | if (!error) |
2030 | newvp = NFSTOV(np); | |
2031 | } | |
2032 | if (error) { | |
2033 | if (newvp) | |
2034 | vput(newvp); | |
2035 | } else { | |
2036 | *ap->a_vpp = newvp; | |
2037 | } | |
5a9187cb | 2038 | VTONFS(dvp)->n_flag |= NLMODIFIED; |
984263bc MD |
2039 | if (!wccflag) |
2040 | VTONFS(dvp)->n_attrstamp = 0; | |
2041 | return (error); | |
2042 | } | |
2043 | ||
2044 | /* | |
2045 | * nfs make dir call | |
e851b29e CP |
2046 | * |
2047 | * nfs_mkdir(struct vnode *a_dvp, struct vnode **a_vpp, | |
2048 | * struct componentname *a_cnp, struct vattr *a_vap) | |
984263bc MD |
2049 | */ |
2050 | static int | |
e62afb5f | 2051 | nfs_mkdir(struct vop_old_mkdir_args *ap) |
984263bc | 2052 | { |
40393ded RG |
2053 | struct vnode *dvp = ap->a_dvp; |
2054 | struct vattr *vap = ap->a_vap; | |
2055 | struct componentname *cnp = ap->a_cnp; | |
2056 | struct nfsv2_sattr *sp; | |
60233e58 SW |
2057 | struct nfsnode *np = NULL; |
2058 | struct vnode *newvp = NULL; | |
42edf14f | 2059 | struct vattr vattr; |
984263bc MD |
2060 | int error = 0, wccflag = NFSV3_WCCRATTR; |
2061 | int gotvp = 0; | |
42edf14f MD |
2062 | int len; |
2063 | struct nfsm_info info; | |
2064 | ||
2065 | info.mrep = NULL; | |
2066 | info.v3 = NFS_ISV3(dvp); | |
984263bc | 2067 | |
87de5057 | 2068 | if ((error = VOP_GETATTR(dvp, &vattr)) != 0) { |
984263bc MD |
2069 | return (error); |
2070 | } | |
2071 | len = cnp->cn_namelen; | |
2072 | nfsstats.rpccnt[NFSPROC_MKDIR]++; | |
42edf14f MD |
2073 | nfsm_reqhead(&info, dvp, NFSPROC_MKDIR, |
2074 | NFSX_FH(info.v3) + NFSX_UNSIGNED + | |
2075 | nfsm_rndup(len) + NFSX_SATTR(info.v3)); | |
2076 | ERROROUT(nfsm_fhtom(&info, dvp)); | |
2077 | ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, len, NFS_MAXNAMLEN)); | |
2078 | if (info.v3) { | |
2079 | nfsm_v3attrbuild(&info, vap, FALSE); | |
984263bc | 2080 | } else { |
42edf14f | 2081 | sp = nfsm_build(&info, NFSX_V2SATTR); |
984263bc MD |
2082 | sp->sa_mode = vtonfsv2_mode(VDIR, vap->va_mode); |
2083 | sp->sa_uid = nfs_xdrneg1; | |
2084 | sp->sa_gid = nfs_xdrneg1; | |
2085 | sp->sa_size = nfs_xdrneg1; | |
2086 | txdr_nfsv2time(&vap->va_atime, &sp->sa_atime); | |
2087 | txdr_nfsv2time(&vap->va_mtime, &sp->sa_mtime); | |
2088 | } | |
42edf14f MD |
2089 | NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_MKDIR, cnp->cn_td, |
2090 | cnp->cn_cred, &error)); | |
2091 | if (error == 0) { | |
2092 | ERROROUT(nfsm_mtofh(&info, dvp, &newvp, &gotvp)); | |
2093 | } | |
2094 | if (info.v3) { | |
2095 | ERROROUT(nfsm_wcc_data(&info, dvp, &wccflag)); | |
2096 | } | |
2097 | m_freem(info.mrep); | |
2098 | info.mrep = NULL; | |
6b08710e | 2099 | nfsmout: |
5a9187cb | 2100 | VTONFS(dvp)->n_flag |= NLMODIFIED; |
984263bc MD |
2101 | if (!wccflag) |
2102 | VTONFS(dvp)->n_attrstamp = 0; | |
2103 | /* | |
2104 | * Kludge: Map EEXIST => 0 assuming that you have a reply to a retry | |
2105 | * if we can succeed in looking up the directory. | |
2106 | */ | |
2107 | if (error == EEXIST || (!error && !gotvp)) { | |
2108 | if (newvp) { | |
2109 | vrele(newvp); | |
60233e58 | 2110 | newvp = NULL; |
984263bc MD |
2111 | } |
2112 | error = nfs_lookitup(dvp, cnp->cn_nameptr, len, cnp->cn_cred, | |
dadab5e9 | 2113 | cnp->cn_td, &np); |
984263bc MD |
2114 | if (!error) { |
2115 | newvp = NFSTOV(np); | |
2116 | if (newvp->v_type != VDIR) | |
2117 | error = EEXIST; | |
2118 | } | |
2119 | } | |
2120 | if (error) { | |
2121 | if (newvp) | |
2122 | vrele(newvp); | |
2123 | } else | |
2124 | *ap->a_vpp = newvp; | |
2125 | return (error); | |
2126 | } | |
2127 | ||
2128 | /* | |
2129 | * nfs remove directory call | |
e851b29e CP |
2130 | * |
2131 | * nfs_rmdir(struct vnode *a_dvp, struct vnode *a_vp, | |
2132 | * struct componentname *a_cnp) | |
984263bc MD |
2133 | */ |
2134 | static int | |
e62afb5f | 2135 | nfs_rmdir(struct vop_old_rmdir_args *ap) |
984263bc | 2136 | { |
40393ded RG |
2137 | struct vnode *vp = ap->a_vp; |
2138 | struct vnode *dvp = ap->a_dvp; | |
2139 | struct componentname *cnp = ap->a_cnp; | |
984263bc | 2140 | int error = 0, wccflag = NFSV3_WCCRATTR; |
42edf14f MD |
2141 | struct nfsm_info info; |
2142 | ||
2143 | info.mrep = NULL; | |
2144 | info.v3 = NFS_ISV3(dvp); | |
984263bc MD |
2145 | |
2146 | if (dvp == vp) | |
2147 | return (EINVAL); | |
2148 | nfsstats.rpccnt[NFSPROC_RMDIR]++; | |
42edf14f MD |
2149 | nfsm_reqhead(&info, dvp, NFSPROC_RMDIR, |
2150 | NFSX_FH(info.v3) + NFSX_UNSIGNED + | |
2151 | nfsm_rndup(cnp->cn_namelen)); | |
2152 | ERROROUT(nfsm_fhtom(&info, dvp)); | |
2153 | ERROROUT(nfsm_strtom(&info, cnp->cn_nameptr, cnp->cn_namelen, | |
2154 | NFS_MAXNAMLEN)); | |
2155 | NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_RMDIR, cnp->cn_td, | |
2156 | cnp->cn_cred, &error)); | |
2157 | if (info.v3) { | |
2158 | ERROROUT(nfsm_wcc_data(&info, dvp, &wccflag)); | |
2159 | } | |
2160 | m_freem(info.mrep); | |
2161 | info.mrep = NULL; | |
6b08710e | 2162 | nfsmout: |
5a9187cb | 2163 | VTONFS(dvp)->n_flag |= NLMODIFIED; |
984263bc MD |
2164 | if (!wccflag) |
2165 | VTONFS(dvp)->n_attrstamp = 0; | |
984263bc MD |
2166 | /* |
2167 | * Kludge: Map ENOENT => 0 assuming that you have a reply to a retry. | |
2168 | */ | |
2169 | if (error == ENOENT) | |
2170 | error = 0; | |
2171 | return (error); | |
2172 | } | |
2173 | ||
2174 | /* | |
2175 | * nfs readdir call | |
e851b29e CP |
2176 | * |
2177 | * nfs_readdir(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred) | |
984263bc MD |
2178 | */ |
2179 | static int | |
e851b29e | 2180 | nfs_readdir(struct vop_readdir_args *ap) |
984263bc | 2181 | { |
40393ded RG |
2182 | struct vnode *vp = ap->a_vp; |
2183 | struct nfsnode *np = VTONFS(vp); | |
2184 | struct uio *uio = ap->a_uio; | |
984263bc MD |
2185 | int tresid, error; |
2186 | struct vattr vattr; | |
2187 | ||
2188 | if (vp->v_type != VDIR) | |
2189 | return (EPERM); | |
5a9187cb | 2190 | |
885ecb13 MD |
2191 | if ((error = vn_lock(vp, LK_EXCLUSIVE | LK_RETRY)) != 0) |
2192 | return (error); | |
2193 | ||
984263bc | 2194 | /* |
5a9187cb MD |
2195 | * If we have a valid EOF offset cache we must call VOP_GETATTR() |
2196 | * and then check that is still valid, or if this is an NQNFS mount | |
2197 | * we call NQNFS_CKCACHEABLE() instead of VOP_GETATTR(). Note that | |
2198 | * VOP_GETATTR() does not necessarily go to the wire. | |
984263bc MD |
2199 | */ |
2200 | if (np->n_direofoffset > 0 && uio->uio_offset >= np->n_direofoffset && | |
5a9187cb | 2201 | (np->n_flag & (NLMODIFIED|NRMODIFIED)) == 0) { |
87de5057 | 2202 | if (VOP_GETATTR(vp, &vattr) == 0 && |
e07fef60 | 2203 | (np->n_flag & (NLMODIFIED|NRMODIFIED)) == 0 |
5a9187cb | 2204 | ) { |
984263bc | 2205 | nfsstats.direofcache_hits++; |
885ecb13 | 2206 | goto done; |
984263bc MD |
2207 | } |
2208 | } | |
2209 | ||
2210 | /* | |
5a9187cb MD |
2211 | * Call nfs_bioread() to do the real work. nfs_bioread() does its |
2212 | * own cache coherency checks so we do not have to. | |
984263bc MD |
2213 | */ |
2214 | tresid = uio->uio_resid; | |
3b568787 | 2215 | error = nfs_bioread(vp, uio, 0); |
984263bc MD |
2216 | |
2217 | if (!error && uio->uio_resid == tresid) | |
2218 | nfsstats.direofcache_misses++; | |
885ecb13 MD |
2219 | done: |
2220 | vn_unlock(vp); | |
984263bc MD |
2221 | return (error); |
2222 | } | |
2223 | ||
2224 | /* | |
7d877edf MD |
2225 | * Readdir rpc call. nfs_bioread->nfs_doio->nfs_readdirrpc. |
2226 | * | |
2227 | * Note that for directories, nfs_bioread maintains the underlying nfs-centric | |
2228 | * offset/block and converts the nfs formatted directory entries for userland | |
2229 | * consumption as well as deals with offsets into the middle of blocks. | |
2230 | * nfs_doio only deals with logical blocks. In particular, uio_offset will | |
2231 | * be block-bounded. It must convert to cookies for the actual RPC. | |
984263bc MD |
2232 | */ |
2233 | int | |
3b568787 | 2234 | nfs_readdirrpc(struct vnode *vp, struct uio *uiop) |
984263bc | 2235 | { |
40393ded | 2236 | int len, left; |
01f31ab3 | 2237 | struct nfs_dirent *dp = NULL; |
40393ded | 2238 | u_int32_t *tl; |
40393ded | 2239 | nfsuint64 *cookiep; |
42edf14f | 2240 | caddr_t cp; |
984263bc MD |
2241 | nfsuint64 cookie; |
2242 | struct nfsmount *nmp = VFSTONFS(vp->v_mount); | |
2243 | struct nfsnode *dnp = VTONFS(vp); | |
2244 | u_quad_t fileno; | |
2245 | int error = 0, tlen, more_dirs = 1, blksiz = 0, bigenough = 1; | |
2246 | int attrflag; | |
42edf14f MD |
2247 | struct nfsm_info info; |
2248 | ||
2249 | info.mrep = NULL; | |
2250 | info.v3 = NFS_ISV3(vp); | |
984263bc MD |
2251 | |
2252 | #ifndef DIAGNOSTIC | |
2253 | if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) || | |
2254 | (uiop->uio_resid & (DIRBLKSIZ - 1))) | |
2255 | panic("nfs readdirrpc bad uio"); | |
2256 | #endif | |
2257 | ||
2258 | /* | |
2259 | * If there is no cookie, assume directory was stale. | |
2260 | */ | |
2261 | cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0); | |
2262 | if (cookiep) | |
2263 | cookie = *cookiep; | |
2264 | else | |
2265 | return (NFSERR_BAD_COOKIE); | |
2266 | /* | |
2267 | * Loop around doing readdir rpc's of size nm_readdirsize | |
2268 | * truncated to a multiple of DIRBLKSIZ. | |
2269 | * The stopping criteria is EOF or buffer full. | |
2270 | */ | |
2271 | while (more_dirs && bigenough) { | |
2272 | nfsstats.rpccnt[NFSPROC_READDIR]++; | |
42edf14f MD |
2273 | nfsm_reqhead(&info, vp, NFSPROC_READDIR, |
2274 | NFSX_FH(info.v3) + NFSX_READDIR(info.v3)); | |
2275 | ERROROUT(nfsm_fhtom(&info, vp)); | |
2276 | if (info.v3) { | |
2277 | tl = nfsm_build(&info, 5 * NFSX_UNSIGNED); | |
984263bc MD |
2278 | *tl++ = cookie.nfsuquad[0]; |
2279 | *tl++ = cookie.nfsuquad[1]; | |
2280 | *tl++ = dnp->n_cookieverf.nfsuquad[0]; | |
2281 | *tl++ = dnp->n_cookieverf.nfsuquad[1]; | |
2282 | } else { | |
42edf14f | 2283 | tl = nfsm_build(&info, 2 * NFSX_UNSIGNED); |
984263bc MD |
2284 | *tl++ = cookie.nfsuquad[0]; |
2285 | } | |
2286 | *tl = txdr_unsigned(nmp->nm_readdirsize); | |
42edf14f MD |
2287 | NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_READDIR, |
2288 | uiop->uio_td, | |
2289 | nfs_vpcred(vp, ND_READ), &error)); | |
2290 | if (info.v3) { | |
2291 | ERROROUT(nfsm_postop_attr(&info, vp, &attrflag, | |
2292 | NFS_LATTR_NOSHRINK)); | |
2293 | NULLOUT(tl = nfsm_dissect(&info, 2 * NFSX_UNSIGNED)); | |
2294 | dnp->n_cookieverf.nfsuquad[0] = *tl++; | |
2295 | dnp->n_cookieverf.nfsuquad[1] = *tl; | |
984263bc | 2296 | } |
42edf14f | 2297 | NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED)); |
984263bc MD |
2298 | more_dirs = fxdr_unsigned(int, *tl); |
2299 | ||
7d877edf | 2300 | /* loop thru the dir entries, converting them to std form */ |
984263bc | 2301 | while (more_dirs && bigenough) { |
42edf14f MD |
2302 | if (info.v3) { |
2303 | NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED)); | |
984263bc MD |
2304 | fileno = fxdr_hyper(tl); |
2305 | len = fxdr_unsigned(int, *(tl + 2)); | |
2306 | } else { | |
42edf14f | 2307 | NULLOUT(tl = nfsm_dissect(&info, 2 * NFSX_UNSIGNED)); |
984263bc MD |
2308 | fileno = fxdr_unsigned(u_quad_t, *tl++); |
2309 | len = fxdr_unsigned(int, *tl); | |
2310 | } | |
2311 | if (len <= 0 || len > NFS_MAXNAMLEN) { | |
2312 | error = EBADRPC; | |
42edf14f MD |
2313 | m_freem(info.mrep); |
2314 | info.mrep = NULL; | |
984263bc MD |
2315 | goto nfsmout; |
2316 | } | |
7d877edf MD |
2317 | |
2318 | /* | |
2319 | * len is the number of bytes in the path element | |
2320 | * name, not including the \0 termination. | |
2321 | * | |
2322 | * tlen is the number of bytes w have to reserve for | |
2323 | * the path element name. | |
2324 | */ | |
984263bc MD |
2325 | tlen = nfsm_rndup(len); |
2326 | if (tlen == len) | |
2327 | tlen += 4; /* To ensure null termination */ | |
7d877edf MD |
2328 | |
2329 | /* | |
2330 | * If the entry would cross a DIRBLKSIZ boundary, | |
2331 | * extend the previous nfs_dirent to cover the | |
2332 | * remaining space. | |
2333 | */ | |
984263bc | 2334 | left = DIRBLKSIZ - blksiz; |
01f31ab3 JS |
2335 | if ((tlen + sizeof(struct nfs_dirent)) > left) { |
2336 | dp->nfs_reclen += left; | |
656849c6 | 2337 | uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + left; |
984263bc MD |
2338 | uiop->uio_iov->iov_len -= left; |
2339 | uiop->uio_offset += left; | |
2340 | uiop->uio_resid -= left; | |
2341 | blksiz = 0; | |
2342 | } | |
01f31ab3 | 2343 | if ((tlen + sizeof(struct nfs_dirent)) > uiop->uio_resid) |
984263bc MD |
2344 | bigenough = 0; |
2345 | if (bigenough) { | |
01f31ab3 JS |
2346 | dp = (struct nfs_dirent *)uiop->uio_iov->iov_base; |
2347 | dp->nfs_ino = fileno; | |
2348 | dp->nfs_namlen = len; | |
2349 | dp->nfs_reclen = tlen + sizeof(struct nfs_dirent); | |
2350 | dp->nfs_type = DT_UNKNOWN; | |
2351 | blksiz += dp->nfs_reclen; | |
984263bc MD |
2352 | if (blksiz == DIRBLKSIZ) |
2353 | blksiz = 0; | |
01f31ab3 JS |
2354 | uiop->uio_offset += sizeof(struct nfs_dirent); |
2355 | uiop->uio_resid -= sizeof(struct nfs_dirent); | |
656849c6 | 2356 | uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + sizeof(struct nfs_dirent); |
01f31ab3 | 2357 | uiop->uio_iov->iov_len -= sizeof(struct nfs_dirent); |
42edf14f | 2358 | ERROROUT(nfsm_mtouio(&info, uiop, len)); |
7d877edf MD |
2359 | |
2360 | /* | |
2361 | * The uiop has advanced by nfs_dirent + len | |
2362 | * but really needs to advance by | |
2363 | * nfs_dirent + tlen | |
2364 | */ | |
984263bc MD |
2365 | cp = uiop->uio_iov->iov_base; |
2366 | tlen -= len; | |
2367 | *cp = '\0'; /* null terminate */ | |
656849c6 | 2368 | uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + tlen; |
984263bc MD |
2369 | uiop->uio_iov->iov_len -= tlen; |
2370 | uiop->uio_offset += tlen; | |
2371 | uiop->uio_resid -= tlen; | |
7d877edf MD |
2372 | } else { |
2373 | /* | |
2374 | * NFS strings must be rounded up (nfsm_myouio | |
2375 | * handled that in the bigenough case). | |
2376 | */ | |
42edf14f | 2377 | ERROROUT(nfsm_adv(&info, nfsm_rndup(len))); |
7d877edf | 2378 | } |
42edf14f MD |
2379 | if (info.v3) { |
2380 | NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED)); | |
984263bc | 2381 | } else { |
42edf14f | 2382 | NULLOUT(tl = nfsm_dissect(&info, 2 * NFSX_UNSIGNED)); |
984263bc | 2383 | } |
7d877edf MD |
2384 | |
2385 | /* | |
2386 | * If we were able to accomodate the last entry, | |
2387 | * get the cookie for the next one. Otherwise | |
2388 | * hold-over the cookie for the one we were not | |
2389 | * able to accomodate. | |
2390 | */ | |
984263bc MD |
2391 | if (bigenough) { |
2392 | cookie.nfsuquad[0] = *tl++; | |
42edf14f | 2393 | if (info.v3) |
984263bc | 2394 | cookie.nfsuquad[1] = *tl++; |
42edf14f | 2395 | } else if (info.v3) { |
984263bc | 2396 | tl += 2; |
7d877edf | 2397 | } else { |
984263bc | 2398 | tl++; |
7d877edf | 2399 | } |
984263bc MD |
2400 | more_dirs = fxdr_unsigned(int, *tl); |
2401 | } | |
2402 | /* | |
2403 | * If at end of rpc data, get the eof boolean | |
2404 | */ | |
2405 | if (!more_dirs) { | |
42edf14f | 2406 | NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED)); |
984263bc MD |
2407 | more_dirs = (fxdr_unsigned(int, *tl) == 0); |
2408 | } | |
42edf14f MD |
2409 | m_freem(info.mrep); |
2410 | info.mrep = NULL; | |
984263bc MD |
2411 | } |
2412 | /* | |
2413 | * Fill last record, iff any, out to a multiple of DIRBLKSIZ | |
2414 | * by increasing d_reclen for the last record. | |
2415 | */ | |
2416 | if (blksiz > 0) { | |
2417 | left = DIRBLKSIZ - blksiz; | |
01f31ab3 | 2418 | dp->nfs_reclen += left; |
656849c6 | 2419 | uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + left; |
984263bc MD |
2420 | uiop->uio_iov->iov_len -= left; |
2421 | uiop->uio_offset += left; | |
2422 | uiop->uio_resid -= left; | |
2423 | } | |
2424 | ||
7d877edf MD |
2425 | if (bigenough) { |
2426 | /* | |
2427 | * We hit the end of the directory, update direofoffset. | |
2428 | */ | |
984263bc | 2429 | dnp->n_direofoffset = uiop->uio_offset; |
7d877edf MD |
2430 | } else { |
2431 | /* | |
2432 | * There is more to go, insert the link cookie so the | |
2433 | * next block can be read. | |
2434 | */ | |
984263bc | 2435 | if (uiop->uio_resid > 0) |
086c1d7e | 2436 | kprintf("EEK! readdirrpc resid > 0\n"); |
984263bc MD |
2437 | cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1); |
2438 | *cookiep = cookie; | |
2439 | } | |
2440 | nfsmout: | |
2441 | return (error); | |
2442 | } | |
2443 | ||
2444 | /* | |
2445 | * NFS V3 readdir plus RPC. Used in place of nfs_readdirrpc(). | |
2446 | */ | |
2447 | int | |
3b568787 | 2448 | nfs_readdirplusrpc(struct vnode *vp, struct uio *uiop) |
984263bc | 2449 | { |
40393ded | 2450 | int len, left; |
01f31ab3 | 2451 | struct nfs_dirent *dp; |
40393ded | 2452 | u_int32_t *tl; |
40393ded RG |
2453 | struct vnode *newvp; |
2454 | nfsuint64 *cookiep; | |
42edf14f MD |
2455 | caddr_t dpossav1, dpossav2; |
2456 | caddr_t cp; | |
2457 | struct mbuf *mdsav1, *mdsav2; | |
984263bc MD |
2458 | nfsuint64 cookie; |
2459 | struct nfsmount *nmp = VFSTONFS(vp->v_mount); | |
2460 | struct nfsnode *dnp = VTONFS(vp), *np; | |
2461 | nfsfh_t *fhp; | |
2462 | u_quad_t fileno; | |
2463 | int error = 0, tlen, more_dirs = 1, blksiz = 0, doit, bigenough = 1, i; | |
2464 | int attrflag, fhsize; | |
28623bf9 MD |
2465 | struct nchandle nch; |
2466 | struct nchandle dnch; | |
fad57d0e | 2467 | struct nlcomponent nlc; |
42edf14f MD |
2468 | struct nfsm_info info; |
2469 | ||
2470 | info.mrep = NULL; | |
2471 | info.v3 = 1; | |
984263bc MD |
2472 | |
2473 | #ifndef nolint | |
01f31ab3 | 2474 | dp = NULL; |
984263bc MD |
2475 | #endif |
2476 | #ifndef DIAGNOSTIC | |
2477 | if (uiop->uio_iovcnt != 1 || (uiop->uio_offset & (DIRBLKSIZ - 1)) || | |
2478 | (uiop->uio_resid & (DIRBLKSIZ - 1))) | |
2479 | panic("nfs readdirplusrpc bad uio"); | |
2480 | #endif | |
fad57d0e MD |
2481 | /* |
2482 | * Obtain the namecache record for the directory so we have something | |
2483 | * to use as a basis for creating the entries. This function will | |
2484 | * return a held (but not locked) ncp. The ncp may be disconnected | |
2485 | * from the tree and cannot be used for upward traversals, and the | |
2486 | * ncp may be unnamed. Note that other unrelated operations may | |
2487 | * cause the ncp to be named at any time. | |
2488 | */ | |
28623bf9 | 2489 | cache_fromdvp(vp, NULL, 0, &dnch); |
fad57d0e | 2490 | bzero(&nlc, sizeof(nlc)); |
984263bc MD |
2491 | newvp = NULLVP; |
2492 | ||
2493 | /* | |
2494 | * If there is no cookie, assume directory was stale. | |
2495 | */ | |
2496 | cookiep = nfs_getcookie(dnp, uiop->uio_offset, 0); | |
2497 | if (cookiep) | |
2498 | cookie = *cookiep; | |
2499 | else | |
2500 | return (NFSERR_BAD_COOKIE); | |
2501 | /* | |
2502 | * Loop around doing readdir rpc's of size nm_readdirsize | |
2503 | * truncated to a multiple of DIRBLKSIZ. | |
2504 | * The stopping criteria is EOF or buffer full. | |
2505 | */ | |
2506 | while (more_dirs && bigenough) { | |
2507 | nfsstats.rpccnt[NFSPROC_READDIRPLUS]++; | |
42edf14f MD |
2508 | nfsm_reqhead(&info, vp, NFSPROC_READDIRPLUS, |
2509 | NFSX_FH(1) + 6 * NFSX_UNSIGNED); | |
2510 | ERROROUT(nfsm_fhtom(&info, vp)); | |
2511 | tl = nfsm_build(&info, 6 * NFSX_UNSIGNED); | |
984263bc MD |
2512 | *tl++ = cookie.nfsuquad[0]; |
2513 | *tl++ = cookie.nfsuquad[1]; | |
2514 | *tl++ = dnp->n_cookieverf.nfsuquad[0]; | |
2515 | *tl++ = dnp->n_cookieverf.nfsuquad[1]; | |
2516 | *tl++ = txdr_unsigned(nmp->nm_readdirsize); | |
2517 | *tl = txdr_unsigned(nmp->nm_rsize); | |
42edf14f MD |
2518 | NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_READDIRPLUS, |
2519 | uiop->uio_td, | |
2520 | nfs_vpcred(vp, ND_READ), &error)); | |
2521 | ERROROUT(nfsm_postop_attr(&info, vp, &attrflag, | |
2522 | NFS_LATTR_NOSHRINK)); | |
2523 | NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED)); | |
984263bc MD |
2524 | dnp->n_cookieverf.nfsuquad[0] = *tl++; |
2525 | dnp->n_cookieverf.nfsuquad[1] = *tl++; | |
2526 | more_dirs = fxdr_unsigned(int, *tl); | |
2527 | ||
2528 | /* loop thru the dir entries, doctoring them to 4bsd form */ | |
2529 | while (more_dirs && bigenough) { | |
42edf14f | 2530 | NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED)); |
984263bc MD |
2531 | fileno = fxdr_hyper(tl); |
2532 | len = fxdr_unsigned(int, *(tl + 2)); | |
2533 | if (len <= 0 || len > NFS_MAXNAMLEN) { | |
2534 | error = EBADRPC; | |
42edf14f MD |
2535 | m_freem(info.mrep); |
2536 | info.mrep = NULL; | |
984263bc MD |
2537 | goto nfsmout; |
2538 | } | |
2539 | tlen = nfsm_rndup(len); | |
2540 | if (tlen == len) | |
2541 | tlen += 4; /* To ensure null termination*/ | |
2542 | left = DIRBLKSIZ - blksiz; | |
01f31ab3 JS |
2543 | if ((tlen + sizeof(struct nfs_dirent)) > left) { |
2544 | dp->nfs_reclen += left; | |
656849c6 | 2545 | uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + left; |
984263bc MD |
2546 | uiop->uio_iov->iov_len -= left; |
2547 | uiop->uio_offset += left; | |
2548 | uiop->uio_resid -= left; | |
2549 | blksiz = 0; | |
2550 | } | |
01f31ab3 | 2551 | if ((tlen + sizeof(struct nfs_dirent)) > uiop->uio_resid) |
984263bc MD |
2552 | bigenough = 0; |
2553 | if (bigenough) { | |
01f31ab3 JS |
2554 | dp = (struct nfs_dirent *)uiop->uio_iov->iov_base; |
2555 | dp->nfs_ino = fileno; | |
2556 | dp->nfs_namlen = len; | |
2557 | dp->nfs_reclen = tlen + sizeof(struct nfs_dirent); | |
2558 | dp->nfs_type = DT_UNKNOWN; | |
2559 | blksiz += dp->nfs_reclen; | |
984263bc MD |
2560 | if (blksiz == DIRBLKSIZ) |
2561 | blksiz = 0; | |
01f31ab3 JS |
2562 | uiop->uio_offset += sizeof(struct nfs_dirent); |
2563 | uiop->uio_resid -= sizeof(struct nfs_dirent); | |
656849c6 | 2564 | uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + sizeof(struct nfs_dirent); |
01f31ab3 | 2565 | uiop->uio_iov->iov_len -= sizeof(struct nfs_dirent); |
fad57d0e MD |
2566 | nlc.nlc_nameptr = uiop->uio_iov->iov_base; |
2567 | nlc.nlc_namelen = len; | |
42edf14f | 2568 | ERROROUT(nfsm_mtouio(&info, uiop, len)); |
984263bc MD |
2569 | cp = uiop->uio_iov->iov_base; |
2570 | tlen -= len; | |
2571 | *cp = '\0'; | |
656849c6 | 2572 | uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + tlen; |
984263bc MD |
2573 | uiop->uio_iov->iov_len -= tlen; |
2574 | uiop->uio_offset += tlen; | |
2575 | uiop->uio_resid -= tlen; | |
42edf14f MD |
2576 | } else { |
2577 | ERROROUT(nfsm_adv(&info, nfsm_rndup(len))); | |
2578 | } | |
2579 | NULLOUT(tl = nfsm_dissect(&info, 3 * NFSX_UNSIGNED)); | |
984263bc MD |
2580 | if (bigenough) { |
2581 | cookie.nfsuquad[0] = *tl++; | |
2582 | cookie.nfsuquad[1] = *tl++; | |
2583 | } else | |
2584 | tl += 2; | |
2585 | ||
2586 | /* | |
2587 | * Since the attributes are before the file handle | |
2588 | * (sigh), we must skip over the attributes and then | |
2589 | * come back and get them. | |
2590 | */ | |
2591 | attrflag = fxdr_unsigned(int, *tl); | |
2592 | if (attrflag) { | |
42edf14f MD |
2593 | dpossav1 = info.dpos; |
2594 | mdsav1 = info.md; | |
2595 | ERROROUT(nfsm_adv(&info, NFSX_V3FATTR)); | |
2596 | NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED)); | |
984263bc MD |
2597 | doit = fxdr_unsigned(int, *tl); |
2598 | if (doit) { | |
42edf14f | 2599 | NEGATIVEOUT(fhsize = nfsm_getfh(&info, &fhp)); |
984263bc | 2600 | if (NFS_CMPFH(dnp, fhp, fhsize)) { |
597aea93 | 2601 | vref(vp); |
984263bc MD |
2602 | newvp = vp; |
2603 | np = dnp; | |
2604 | } else { | |
2605 | error = nfs_nget(vp->v_mount, fhp, | |
2606 | fhsize, &np); | |
2607 | if (error) | |
2608 | doit = 0; | |
2609 | else | |
2610 | newvp = NFSTOV(np); | |
2611 | } | |
2612 | } | |
2613 | if (doit && bigenough) { | |
42edf14f MD |
2614 | dpossav2 = info.dpos; |
2615 | info.dpos = dpossav1; | |
2616 | mdsav2 = info.md; | |
2617 | info.md = mdsav1; | |
2618 | ERROROUT(nfsm_loadattr(&info, newvp, NULL)); | |
2619 | info.dpos = dpossav2; | |
2620 | info.md = mdsav2; | |
01f31ab3 | 2621 | dp->nfs_type = |
984263bc | 2622 | IFTODT(VTTOIF(np->n_vattr.va_type)); |
28623bf9 | 2623 | if (dnch.ncp) { |
086c1d7e | 2624 | kprintf("NFS/READDIRPLUS, ENTER %*.*s\n", |
fad57d0e MD |
2625 | nlc.nlc_namelen, nlc.nlc_namelen, |
2626 | nlc.nlc_nameptr); | |
28623bf9 MD |
2627 | nch = cache_nlookup(&dnch, &nlc); |
2628 | cache_setunresolved(&nch); | |
a15b4eef MD |
2629 | nfs_cache_setvp(&nch, newvp, |
2630 | nfspos_cache_timeout); | |
28623bf9 | 2631 | cache_put(&nch); |
fad57d0e | 2632 | } else { |
086c1d7e | 2633 | kprintf("NFS/READDIRPLUS, UNABLE TO ENTER" |
fad57d0e MD |
2634 | " %*.*s\n", |
2635 | nlc.nlc_namelen, nlc.nlc_namelen, | |
2636 | nlc.nlc_nameptr); | |
2637 | } | |
984263bc MD |
2638 | } |
2639 | } else { | |
2640 | /* Just skip over the file handle */ | |
42edf14f | 2641 | NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED)); |
984263bc | 2642 | i = fxdr_unsigned(int, *tl); |
42edf14f | 2643 | ERROROUT(nfsm_adv(&info, nfsm_rndup(i))); |
984263bc MD |
2644 | } |
2645 | if (newvp != NULLVP) { | |
2646 | if (newvp == vp) | |
2647 | vrele(newvp); | |
2648 | else | |
2649 | vput(newvp); | |
2650 | newvp = NULLVP; | |
2651 | } | |
42edf14f | 2652 | NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED)); |
984263bc MD |
2653 | more_dirs = fxdr_unsigned(int, *tl); |
2654 | } | |
2655 | /* | |
2656 | * If at end of rpc data, get the eof boolean | |
2657 | */ | |
2658 | if (!more_dirs) { | |
42edf14f | 2659 | NULLOUT(tl = nfsm_dissect(&info, NFSX_UNSIGNED)); |
984263bc MD |
2660 | more_dirs = (fxdr_unsigned(int, *tl) == 0); |
2661 | } | |
42edf14f MD |
2662 | m_freem(info.mrep); |
2663 | info.mrep = NULL; | |
984263bc MD |
2664 | } |
2665 | /* | |
2666 | * Fill last record, iff any, out to a multiple of DIRBLKSIZ | |
2667 | * by increasing d_reclen for the last record. | |
2668 | */ | |
2669 | if (blksiz > 0) { | |
2670 | left = DIRBLKSIZ - blksiz; | |
01f31ab3 | 2671 | dp->nfs_reclen += left; |
656849c6 | 2672 | uiop->uio_iov->iov_base = (char *)uiop->uio_iov->iov_base + left; |
984263bc MD |
2673 | uiop->uio_iov->iov_len -= left; |
2674 | uiop->uio_offset += left; | |
2675 | uiop->uio_resid -= left; | |
2676 | } | |
2677 | ||
2678 | /* | |
2679 | * We are now either at the end of the directory or have filled the | |
2680 | * block. | |
2681 | */ | |
2682 | if (bigenough) | |
2683 | dnp->n_direofoffset = uiop->uio_offset; | |
2684 | else { | |
2685 | if (uiop->uio_resid > 0) | |
086c1d7e | 2686 | kprintf("EEK! readdirplusrpc resid > 0\n"); |
984263bc MD |
2687 | cookiep = nfs_getcookie(dnp, uiop->uio_offset, 1); |
2688 | *cookiep = cookie; | |
2689 | } | |
2690 | nfsmout: | |
2691 | if (newvp != NULLVP) { | |
2692 | if (newvp == vp) | |
2693 | vrele(newvp); | |
2694 | else | |
2695 | vput(newvp); | |
2696 | newvp = NULLVP; | |
2697 | } | |
28623bf9 MD |
2698 | if (dnch.ncp) |
2699 | cache_drop(&dnch); | |
984263bc MD |
2700 | return (error); |
2701 | } | |
2702 | ||
2703 | /* | |
2704 | * Silly rename. To make the NFS filesystem that is stateless look a little | |
2705 | * more like the "ufs" a remove of an active vnode is translated to a rename | |
2706 | * to a funny looking filename that is removed by nfs_inactive on the | |
2707 | * nfsnode. There is the potential for another process on a different client | |
2708 | * to create the same funny name between the nfs_lookitup() fails and the | |
2709 | * nfs_rename() completes, but... | |
2710 | */ | |
2711 | static int | |
e851b29e | 2712 | nfs_sillyrename(struct vnode *dvp, struct vnode *vp, struct componentname *cnp) |
984263bc | 2713 | { |
40393ded | 2714 | struct sillyrename *sp; |
984263bc MD |
2715 | struct nfsnode *np; |
2716 | int error; | |
984263bc | 2717 | |
8c361dda MD |
2718 | /* |
2719 | * We previously purged dvp instead of vp. I don't know why, it | |
2720 | * completely destroys performance. We can't do it anyway with the | |
2721 | * new VFS API since we would be breaking the namecache topology. | |
2722 | */ | |
fad57d0e | 2723 | cache_purge(vp); /* XXX */ |
984263bc MD |
2724 | np = VTONFS(vp); |
2725 | #ifndef DIAGNOSTIC | |
2726 | if (vp->v_type == VDIR) | |
2727 | panic("nfs: sillyrename dir"); | |
2728 | #endif | |
2729 | MALLOC(sp, struct sillyrename *, sizeof (struct sillyrename), | |
2730 | M_NFSREQ, M_WAITOK); | |
2731 | sp->s_cred = crdup(cnp->cn_cred); | |
2732 | sp->s_dvp = dvp; | |
597aea93 | 2733 | vref(dvp); |
984263bc MD |
2734 | |
2735 | /* Fudge together a funny name */ | |
973c11b9 MD |
2736 | sp->s_namlen = ksprintf(sp->s_name, ".nfsA%08x4.4", |
2737 | (int)(intptr_t)cnp->cn_td); | |
984263bc MD |
2738 | |
2739 | /* Try lookitups until we get one that isn't there */ | |
2740 | while (nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, | |
60233e58 | 2741 | cnp->cn_td, NULL) == 0) { |
984263bc MD |
2742 | sp->s_name[4]++; |
2743 | if (sp->s_name[4] > 'z') { | |
2744 | error = EINVAL; | |
2745 | goto bad; | |
2746 | } | |
2747 | } | |
2748 | error = nfs_renameit(dvp, cnp, sp); | |
2749 | if (error) | |
2750 | goto bad; | |
2751 | error = nfs_lookitup(dvp, sp->s_name, sp->s_namlen, sp->s_cred, | |
dadab5e9 | 2752 | cnp->cn_td, &np); |
984263bc MD |
2753 | np->n_sillyrename = sp; |
2754 | return (0); | |
2755 | bad: | |
2756 | vrele(sp->s_dvp); | |
2757 | crfree(sp->s_cred); | |
efda3bd0 | 2758 | kfree((caddr_t)sp, M_NFSREQ); |
984263bc MD |
2759 | return (error); |
2760 | } | |
2761 | ||
2762 | /* | |
2763 | * Look up a file name and optionally either update the file handle or | |
2764 | * allocate an nfsnode, depending on the value of npp. | |
2765 | * npp == NULL --> just do the lookup | |
2766 | * *npp == NULL --> allocate a new nfsnode and make sure attributes are | |
2767 | * handled too | |
2768 | * *npp != NULL --> update the file handle in the vnode | |
2769 | */ | |
2770 | static int | |
e851b29e CP |
2771 | nfs_lookitup(struct vnode *dvp, const char *name, int len, struct ucred *cred, |
2772 | struct thread *td, struct nfsnode **npp) | |
984263bc | 2773 | { |
60233e58 | 2774 | struct vnode *newvp = NULL; |
984263bc | 2775 | struct nfsnode *np, *dnp = VTONFS(dvp); |
984263bc | 2776 | int error = 0, fhlen, attrflag; |
984263bc | 2777 | nfsfh_t *nfhp; |
42edf14f MD |
2778 | struct nfsm_info info; |
2779 | ||
2780 | info.mrep = NULL; | |
2781 | info.v3 = NFS_ISV3(dvp); | |
984263bc MD |
2782 | |
2783 | nfsstats.rpccnt[NFSPROC_LOOKUP]++; | |
42edf14f MD |
2784 | nfsm_reqhead(&info, dvp, NFSPROC_LOOKUP, |
2785 | NFSX_FH(info.v3) + NFSX_UNSIGNED + nfsm_rndup(len)); | |
2786 | ERROROUT(nfsm_fhtom(&info, dvp)); | |
2787 | ERROROUT(nfsm_strtom(&info, name, len, NFS_MAXNAMLEN)); | |
2788 | NEGKEEPOUT(nfsm_request(&info, dvp, NFSPROC_LOOKUP, td, cred, &error)); | |
984263bc | 2789 | if (npp && !error) { |
42edf14f | 2790 | NEGATIVEOUT(fhlen = nfsm_getfh(&info, &nfhp)); |
984263bc MD |
2791 | if (*npp) { |
2792 | np = *npp; | |
2793 | if (np->n_fhsize > NFS_SMALLFH && fhlen <= NFS_SMALLFH) { | |
efda3bd0 | 2794 | kfree((caddr_t)np->n_fhp, M_NFSBIGFH); |
984263bc MD |
2795 | np->n_fhp = &np->n_fh; |
2796 | } else if (np->n_fhsize <= NFS_SMALLFH && fhlen>NFS_SMALLFH) | |
efda3bd0 | 2797 | np->n_fhp =(nfsfh_t *)kmalloc(fhlen,M_NFSBIGFH,M_WAITOK); |
984263bc MD |
2798 | bcopy((caddr_t)nfhp, (caddr_t)np->n_fhp, fhlen); |
2799 | np->n_fhsize = fhlen; | |
2800 | newvp = NFSTOV(np); | |
2801 | } else if (NFS_CMPFH(dnp, nfhp, fhlen)) { | |
597aea93 | 2802 | vref(dvp); |
984263bc MD |
2803 | newvp = dvp; |
2804 | } else { | |
2805 | error = nfs_nget(dvp->v_mount, nfhp, fhlen, &np); | |
2806 | if (error) { | |
42edf14f MD |
2807 | m_freem(info.mrep); |
2808 | info.mrep = NULL; | |
984263bc MD |
2809 | return (error); |
2810 | } | |
2811 | newvp = NFSTOV(np); | |
2812 | } | |
42edf14f MD |
2813 | if (info.v3) { |
2814 | ERROROUT(nfsm_postop_attr(&info, newvp, &attrflag, | |
2815 | NFS_LATTR_NOSHRINK)); | |
984263bc | 2816 | if (!attrflag && *npp == NULL) { |
42edf14f MD |
2817 | m_freem(info.mrep); |
2818 | info.mrep = NULL; | |
984263bc MD |
2819 | if (newvp == dvp) |
2820 | vrele(newvp); | |
2821 | else | |
2822 | vput(newvp); | |
2823 | return (ENOENT); | |
2824 | } | |
42edf14f MD |
2825 | } else { |
2826 | ERROROUT(error = nfsm_loadattr(&info, newvp, NULL)); | |
2827 | } | |
984263bc | 2828 | } |
42edf14f MD |
2829 | m_freem(info.mrep); |
2830 | info.mrep = NULL; | |
6b08710e | 2831 | nfsmout: |
984263bc MD |
2832 | if (npp && *npp == NULL) { |
2833 | if (error) { | |
2834 | if (newvp) { | |
2835 | if (newvp == dvp) | |
2836 | vrele(newvp); | |
2837 | else | |
2838 | vput(newvp); | |
2839 | } | |
2840 | } else | |
2841 | *npp = np; | |
2842 | } | |
2843 | return (error); | |
2844 | } | |
2845 | ||
2846 | /* | |
2847 | * Nfs Version 3 commit rpc | |
2848 | */ | |
2849 | int | |
3b568787 | 2850 | nfs_commit(struct vnode *vp, u_quad_t offset, int cnt, struct thread *td) |
984263bc | 2851 | { |
40393ded | 2852 | struct nfsmount *nmp = VFSTONFS(vp->v_mount); |
984263bc | 2853 | int error = 0, wccflag = NFSV3_WCCRATTR; |
42edf14f MD |
2854 | struct nfsm_info info; |
2855 | u_int32_t *tl; | |
2856 | ||
2857 | info.mrep = NULL; | |
2858 | info.v3 = 1; | |
984263bc MD |
2859 | |
2860 | if ((nmp->nm_state & NFSSTA_HASWRITEVERF) == 0) | |
2861 | return (0); | |
2862 | nfsstats.rpccnt[NFSPROC_COMMIT]++; | |
42edf14f MD |
2863 | nfsm_reqhead(&info, vp, NFSPROC_COMMIT, NFSX_FH(1)); |
2864 | ERROROUT(nfsm_fhtom(&info, vp)); | |
2865 | tl = nfsm_build(&info, 3 * NFSX_UNSIGNED); | |
984263bc MD |
2866 | txdr_hyper(offset, tl); |
2867 | tl += 2; | |
2868 | *tl = txdr_unsigned(cnt); | |
42edf14f MD |
2869 | NEGKEEPOUT(nfsm_request(&info, vp, NFSPROC_COMMIT, td, |
2870 | nfs_vpcred(vp, ND_WRITE), &error)); | |
2871 | ERROROUT(nfsm_wcc_data(&info, vp, &wccflag)); | |
984263bc | 2872 | if (!error) { |
42edf14f | 2873 | NULLOUT(tl = nfsm_dissect(&info, NFSX_V3WRITEVERF)); |
984263bc MD |
2874 | if (bcmp((caddr_t)nmp->nm_verf, (caddr_t)tl, |
2875 | NFSX_V3WRITEVERF)) { | |
2876 | bcopy((caddr_t)tl, (caddr_t)nmp->nm_verf, | |
2877 | NFSX_V3WRITEVERF); | |
2878 | error = NFSERR_STALEWRITEVERF; | |
2879 | } | |
2880 | } | |
42edf14f MD |
2881 | m_freem(info.mrep); |
2882 | info.mrep = NULL; | |
6b08710e | 2883 | nfsmout: |
984263bc MD |
2884 | return (error); |
2885 | } | |
2886 | ||
2887 | /* | |
2888 | * Kludge City.. | |
2889 | * - make nfs_bmap() essentially a no-op that does no translation | |
2890 | * - do nfs_strategy() by doing I/O with nfs_readrpc/nfs_writerpc | |
2891 | * (Maybe I could use the process's page mapping, but I was concerned that | |
2892 | * Kernel Write might not be enabled and also figured copyout() would do | |
2893 | * a lot more work than bcopy() and also it currently happens in the | |
2894 | * context of the swapper process (2). | |
e851b29e | 2895 | * |
08daea96 | 2896 | * nfs_bmap(struct vnode *a_vp, off_t a_loffset, |
54078292 | 2897 | * off_t *a_doffsetp, int *a_runp, int *a_runb) |
984263bc MD |
2898 | */ |
2899 | static int | |
e851b29e | 2900 | nfs_bmap(struct vop_bmap_args *ap) |
984263bc | 2901 | { |
54078292 MD |
2902 | if (ap->a_doffsetp != NULL) |
2903 | *ap->a_doffsetp = ap->a_loffset; | |
984263bc MD |
2904 | if (ap->a_runp != NULL) |
2905 | *ap->a_runp = 0; | |
2906 | if (ap->a_runb != NULL) | |
2907 | *ap->a_runb = 0; | |
2908 | return (0); | |
2909 | } | |
2910 | ||
2911 | /* | |
2912 | * Strategy routine. | |
81b5c339 | 2913 | * |
984263bc MD |
2914 | * For async requests when nfsiod(s) are running, queue the request by |
2915 | * calling nfs_asyncio(), otherwise just all nfs_doio() to do the | |
2916 | * request. | |
2917 | */ | |
2918 | static int | |
e851b29e | 2919 | nfs_strategy(struct vop_strategy_args *ap) |
984263bc | 2920 | { |
81b5c339 MD |
2921 | struct bio *bio = ap->a_bio; |
2922 | struct bio *nbio; | |
2923 | struct buf *bp = bio->bio_buf; | |
dadab5e9 | 2924 | struct thread *td; |
984263bc MD |
2925 | int error = 0; |
2926 | ||
10f3fee5 MD |
2927 | KASSERT(bp->b_cmd != BUF_CMD_DONE, |
2928 | ("nfs_strategy: buffer %p unexpectedly marked done", bp)); | |
81b5c339 MD |
2929 | KASSERT(BUF_REFCNT(bp) > 0, |
2930 | ("nfs_strategy: buffer %p not locked", bp)); | |
984263bc | 2931 | |
ae8e83e6 | 2932 | if (bio->bio_flags & BIO_SYNC) |
dadab5e9 | 2933 | td = curthread; /* XXX */ |
ae8e83e6 MD |
2934 | else |
2935 | td = NULL; | |
984263bc | 2936 | |
81b5c339 | 2937 | /* |
54078292 MD |
2938 | * We probably don't need to push an nbio any more since no |
2939 | * block conversion is required due to the use of 64 bit byte | |
2940 | * offsets, but do it anyway. | |
81b5c339 MD |
2941 | */ |
2942 | nbio = push_bio(bio); | |
54078292 | 2943 | nbio->bio_offset = bio->bio_offset; |
81b5c339 | 2944 | |
984263bc MD |
2945 | /* |
2946 | * If the op is asynchronous and an i/o daemon is waiting | |
2947 | * queue the request, wake it up and wait for completion | |
2948 | * otherwise just do it ourselves. | |
2949 | */ | |
ae8e83e6 | 2950 | if ((bio->bio_flags & BIO_SYNC) || nfs_asyncio(ap->a_vp, nbio, td)) |
81b5c339 | 2951 | error = nfs_doio(ap->a_vp, nbio, td); |
984263bc MD |
2952 | return (error); |
2953 | } | |
2954 | ||
2955 | /* | |
2956 | * Mmap a file | |
2957 | * | |
2958 | * NB Currently unsupported. | |
e851b29e | 2959 | * |
b478fdce | 2960 | * nfs_mmap(struct vnode *a_vp, int a_fflags, struct ucred *a_cred) |
984263bc MD |
2961 | */ |
2962 | /* ARGSUSED */ | |
2963 | static int | |
e851b29e | 2964 | nfs_mmap(struct vop_mmap_args *ap) |
984263bc | 2965 | { |
984263bc MD |
2966 | return (EINVAL); |
2967 | } | |
2968 | ||
2969 | /* | |
2970 | * fsync vnode op. Just call nfs_flush() with commit == 1. | |
e851b29e | 2971 | * |
b478fdce | 2972 | * nfs_fsync(struct vnode *a_vp, int a_waitfor) |
984263bc MD |
2973 | */ |
2974 | /* ARGSUSED */ | |
2975 | static int | |
e851b29e | 2976 | nfs_fsync(struct vop_fsync_args *ap) |
984263bc | 2977 | { |
87de5057 | 2978 | return (nfs_flush(ap->a_vp, ap->a_waitfor, curthread, 1)); |
984263bc MD |
2979 | } |
2980 | ||
2981 | /* | |
6bae6177 MD |
2982 | * Flush all the blocks associated with a vnode. Dirty NFS buffers may be |
2983 | * in one of two states: If B_NEEDCOMMIT is clear then the buffer contains | |
2984 | * new NFS data which needs to be written to the server. If B_NEEDCOMMIT is | |
2985 | * set the buffer contains data that has already been written to the server | |
2986 | * and which now needs a commit RPC. | |
2987 | * | |
2988 | * If commit is 0 we only take one pass and only flush buffers containing new | |
2989 | * dirty data. | |
2990 | * | |
2991 | * If commit is 1 we take two passes, issuing a commit RPC in the second | |
2992 | * pass. | |
2993 | * | |
2994 | * If waitfor is MNT_WAIT and commit is 1, we loop as many times as required | |
2995 | * to completely flush all pending data. | |
2996 | * | |
2997 | * Note that the RB_SCAN code properly handles the case where the | |
2998 | * callback might block and directly or indirectly (another thread) cause | |
2999 | * the RB tree to change. | |
984263bc | 3000 | */ |
6bae6177 MD |
3001 | |
3002 | #ifndef NFS_COMMITBVECSIZ | |
3003 | #define NFS_COMMITBVECSIZ 16 | |
3004 | #endif | |
3005 | ||
3006 | struct nfs_flush_info { | |
3007 | enum { NFI_FLUSHNEW, NFI_COMMIT } mode; | |
3008 | struct thread *td; | |
3009 | struct vnode *vp; | |
3010 | int waitfor; | |
3011 | int slpflag; | |
3012 | int slptimeo; | |
3013 | int loops; | |
3014 | struct buf *bvary[NFS_COMMITBVECSIZ]; | |
3015 | int bvsize; | |
3016 | off_t beg_off; | |
3017 | off_t end_off; | |
3018 | }; | |
3019 | ||
3020 | static int nfs_flush_bp(struct buf *bp, void *data); | |
3021 | static int nfs_flush_docommit(struct nfs_flush_info *info, int error); | |
3022 | ||
5a9187cb | 3023 | int |
e851b29e | 3024 | nfs_flush(struct vnode *vp, int waitfor, struct thread *td, int commit) |
984263bc | 3025 | { |
40393ded | 3026 | struct nfsnode *np = VTONFS(vp); |
984263bc | 3027 | struct nfsmount *nmp = VFSTONFS(vp->v_mount); |
6bae6177 | 3028 | struct nfs_flush_info info; |
0202303b | 3029 | lwkt_tokref vlock; |
6bae6177 | 3030 | int error; |
984263bc | 3031 | |
6bae6177 MD |
3032 | bzero(&info, sizeof(info)); |
3033 | info.td = td; | |
3034 | info.vp = vp; | |
3035 | info.waitfor = waitfor; | |
3036 | info.slpflag = (nmp->nm_flag & NFSMNT_INT) ? PCATCH : 0; | |
3037 | info.loops = 0; | |
0202303b | 3038 | lwkt_gettoken(&vlock, &vp->v_token); |
6bae6177 MD |
3039 | |
3040 | do { | |
984263bc | 3041 | /* |
6bae6177 | 3042 | * Flush mode |
984263bc | 3043 | */ |
6bae6177 MD |
3044 | info.mode = NFI_FLUSHNEW; |
3045 | error = RB_SCAN(buf_rb_tree, &vp->v_rbdirty_tree, NULL, | |
3046 | nfs_flush_bp, &info); | |
3047 | ||
3048 | /* | |
3049 | * Take a second pass if committing and no error occured. | |
3050 | * Clean up any left over collection (whether an error | |
3051 | * occurs or not). | |
3052 | */ | |
3053 | if (commit && error == 0) { | |
3054 | info.mode = NFI_COMMIT; | |
3055 | error = RB_SCAN(buf_rb_tree, &vp->v_rbdirty_tree, NULL, | |
3056 | nfs_flush_bp, &info); | |
3057 | if (info.bvsize) | |
3058 | error = nfs_flush_docommit(&info, error); | |
984263bc | 3059 | } |
6bae6177 | 3060 | |
984263bc | 3061 | /* |
6bae6177 MD |
3062 | * Wait for pending I/O to complete before checking whether |
3063 | * any further dirty buffers exist. | |
984263bc | 3064 | */ |
a9a20f98 MD |
3065 | while (waitfor == MNT_WAIT && |
3066 | bio_track_active(&vp->v_track_write)) { | |
3067 | error = bio_track_wait(&vp->v_track_write, | |
3068 | info.slpflag, info.slptimeo); | |
6bae6177 MD |
3069 | if (error) { |
3070 | /* | |
3071 | * We have to be able to break out if this | |
3072 | * is an 'intr' mount. | |
3073 | */ | |
60233e58 | 3074 | if (nfs_sigintr(nmp, NULL, td)) { |
6bae6177 MD |
3075 | error = -EINTR; |
3076 | break; | |
3077 | } | |
3078 | ||
3079 | /* | |
3080 | * Since we do not process pending signals, | |
3081 | * once we get a PCATCH our tsleep() will no | |
3082 | * longer sleep, switch to a fixed timeout | |
3083 | * instead. | |
3084 | */ | |
3085 | if (info.slpflag == PCATCH) { | |
3086 | info.slpflag = 0; | |
3087 | info.slptimeo = 2 * hz; | |
3088 | } | |
3089 | error = 0; | |
3090 | } | |
3091 | } | |
3092 | ++info.loops; | |
3093 | /* | |
3094 | * Loop if we are flushing synchronous as well as committing, | |
3095 | * and dirty buffers are still present. Otherwise we might livelock. | |
3096 | */ | |
3097 | } while (waitfor == MNT_WAIT && commit && | |
3098 | error == 0 && !RB_EMPTY(&vp->v_rbdirty_tree)); | |
3099 | ||
3100 | /* | |
3101 | * The callbacks have to return a negative error to terminate the | |
3102 | * RB scan. | |
3103 | */ | |
3104 | if (error < 0) | |
3105 | error = -error; | |
3106 | ||
3107 | /* | |
3108 | * Deal with any error collection | |
3109 | */ | |
3110 | if (np->n_flag & NWRITEERR) { | |
3111 | error = np->n_error; | |
3112 | np->n_flag &= ~NWRITEERR; | |
3113 | } | |
0202303b | 3114 | lwkt_reltoken(&vlock); |
6bae6177 MD |
3115 | return (error); |
3116 | } | |
3117 | ||
6bae6177 MD |
3118 | static |
3119 | int | |
3120 | nfs_flush_bp(struct buf *bp, void *data) | |
3121 | { | |
3122 | struct nfs_flush_info *info = data; | |
b1c20cfa | 3123 | int lkflags; |
6bae6177 | 3124 | int error; |
b1c20cfa | 3125 | off_t toff; |
6bae6177 MD |
3126 | |
3127 | error = 0; | |
3128 | switch(info->mode) { | |
3129 | case NFI_FLUSHNEW: | |
b1c20cfa MD |
3130 | error = BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT); |
3131 | if (error && info->loops && info->waitfor == MNT_WAIT) { | |
6bae6177 MD |
3132 | error = BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT); |
3133 | if (error) { | |
b1c20cfa | 3134 | lkflags = LK_EXCLUSIVE | LK_SLEEPFAIL; |
f2770c70 MD |
3135 | if (info->slpflag & PCATCH) |
3136 | lkflags |= LK_PCATCH; | |
3137 | error = BUF_TIMELOCK(bp, lkflags, "nfsfsync", | |
3138 | info->slptimeo); | |
6bae6177 | 3139 | } |
984263bc | 3140 | } |
984263bc | 3141 | |
b1c20cfa MD |
3142 | /* |
3143 | * Ignore locking errors | |
3144 | */ | |
3145 | if (error) { | |
3146 | error = 0; | |
3147 | break; | |
3148 | } | |
3149 | ||
3150 | /* | |
3151 | * The buffer may have changed out from under us, even if | |
3152 | * we did not block (MPSAFE). Check again now that it is | |
3153 | * locked. | |
3154 | */ | |
3155 | if (bp->b_vp == info->vp && | |
3156 | (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) == B_DELWRI) { | |
3157 | bremfree(bp); | |
a482a28a | 3158 | bawrite(bp); |
6bae6177 | 3159 | } else { |
b1c20cfa | 3160 | BUF_UNLOCK(bp); |
6bae6177 MD |
3161 | } |
3162 | break; | |
3163 | case NFI_COMMIT: | |
3164 | /* | |
3165 | * Only process buffers in need of a commit which we can | |
3166 | * immediately lock. This may prevent a buffer from being | |
3167 | * committed, but the normal flush loop will block on the | |
3168 | * same buffer so we shouldn't get into an endless loop. | |
3169 | */ | |
6bae6177 | 3170 | if ((bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) != |
b1c20cfa | 3171 | (B_DELWRI | B_NEEDCOMMIT)) { |
6bae6177 MD |
3172 | break; |
3173 | } | |
b1c20cfa MD |
3174 | if (BUF_LOCK(bp, LK_EXCLUSIVE | LK_NOWAIT)) |
3175 | break; | |
984263bc | 3176 | |
b1c20cfa MD |
3177 | /* |
3178 | * We must recheck after successfully locking the buffer. | |
3179 | */ | |
3180 | if (bp->b_vp != info->vp || | |
3181 | (bp->b_flags & (B_DELWRI | B_NEEDCOMMIT)) != | |
3182 | (B_DELWRI | B_NEEDCOMMIT)) { | |
3183 | BUF_UNLOCK(bp); | |
3184 | break; | |
3185 | } | |
6bae6177 MD |
3186 | |
3187 | /* | |
10f3fee5 MD |
3188 | * NOTE: storing the bp in the bvary[] basically sets |
3189 | * it up for a commit operation. | |
3190 | * | |
3191 | * We must call vfs_busy_pages() now so the commit operation | |
3192 | * is interlocked with user modifications to memory mapped | |
3193 | * pages. | |
6bae6177 MD |
3194 | * |
3195 | * Note: to avoid loopback deadlocks, we do not | |
3196 | * assign b_runningbufspace. | |
3197 | */ | |
b1c20cfa | 3198 | bremfree(bp); |
10f3fee5 MD |
3199 | bp->b_cmd = BUF_CMD_WRITE; |
3200 | vfs_busy_pages(bp->b_vp, bp); | |
6bae6177 | 3201 | info->bvary[info->bvsize] = bp; |
54078292 | 3202 | toff = bp->b_bio2.bio_offset + bp->b_dirtyoff; |
6bae6177 MD |
3203 | if (info->bvsize == 0 || toff < info->beg_off) |
3204 | info->beg_off = toff; | |
54078292 | 3205 | toff += (off_t)(bp->b_dirtyend - bp->b_dirtyoff); |
6bae6177 MD |
3206 | if (info->bvsize == 0 || toff > info->end_off) |
3207 | info->end_off = toff; | |
3208 | ++info->bvsize; | |
3209 | if (info->bvsize == NFS_COMMITBVECSIZ) { | |
3210 | error = nfs_flush_docommit(info, 0); | |
3211 | KKASSERT(info->bvsize == 0); | |
984263bc | 3212 | } |
984263bc | 3213 | } |
6bae6177 MD |
3214 | return (error); |
3215 | } | |
3216 | ||
3217 | static | |
3218 | int | |
3219 | nfs_flush_docommit(struct nfs_flush_info *info, int error) | |
3220 | { | |
3221 | struct vnode *vp; | |
3222 | struct buf *bp; | |
3223 | off_t bytes; | |
3224 | int retv; | |
3225 | int i; | |
6bae6177 MD |
3226 | |
3227 | vp = info->vp; | |
3228 | ||
3229 | if (info->bvsize > 0) { | |
984263bc | 3230 | /* |
3b568787 MD |
3231 | * Commit data on the server, as required. Note that |
3232 | * nfs_commit will use the vnode's cred for the commit. | |
6bae6177 | 3233 | * The NFSv3 commit RPC is limited to a 32 bit byte count. |
984263bc | 3234 | */ |
6bae6177 MD |
3235 | bytes = info->end_off - info->beg_off; |
3236 | if (bytes > 0x40000000) | |
3237 | bytes = 0x40000000; | |
3238 | if (error) { | |
3239 | retv = -error; | |
3240 | } else { | |
3241 | retv = nfs_commit(vp, info->beg_off, | |
b1c20cfa | 3242 | (int)bytes, info->td); |
6bae6177 MD |
3243 | if (retv == NFSERR_STALEWRITEVERF) |
3244 | nfs_clearcommit(vp->v_mount); | |
3245 | } | |
984263bc MD |
3246 | |
3247 | /* | |
3248 | * Now, either mark the blocks I/O done or mark the | |
3249 | * blocks dirty, depending on whether the commit | |
3250 | * succeeded. | |
3251 | */ | |
6bae6177 MD |
3252 | for (i = 0; i < info->bvsize; ++i) { |
3253 | bp = info->bvary[i]; | |
3254 | bp->b_flags &= ~(B_NEEDCOMMIT | B_CLUSTEROK); | |
984263bc MD |
3255 | if (retv) { |
3256 | /* | |
3257 | * Error, leave B_DELWRI intact | |
3258 | */ | |
3259 | vfs_unbusy_pages(bp); | |
10f3fee5 | 3260 | bp->b_cmd = BUF_CMD_DONE; |
984263bc MD |
3261 | brelse(bp); |
3262 | } else { | |
3263 | /* | |
3264 | * Success, remove B_DELWRI ( bundirty() ). | |
3265 | * | |
3266 | * b_dirtyoff/b_dirtyend seem to be NFS | |
3267 | * specific. We should probably move that | |
3268 | * into bundirty(). XXX | |
81b5c339 MD |
3269 | * |
3270 | * We are faking an I/O write, we have to | |
3271 | * start the transaction in order to | |
3272 | * immediately biodone() it. | |
984263bc | 3273 | */ |
984263bc | 3274 | bundirty(bp); |
10f3fee5 | 3275 | bp->b_flags &= ~B_ERROR; |
984263bc | 3276 | bp->b_dirtyoff = bp->b_dirtyend = 0; |
81b5c339 | 3277 | biodone(&bp->b_bio1); |
984263bc MD |
3278 | } |
3279 | } | |
6bae6177 | 3280 | info->bvsize = 0; |
984263bc | 3281 | } |
984263bc MD |
3282 | return (error); |
3283 | } | |
3284 | ||
3285 | /* | |
3286 | * NFS advisory byte-level locks. | |
3287 | * Currently unsupported. | |
e851b29e CP |
3288 | * |
3289 | * nfs_advlock(struct vnode *a_vp, caddr_t a_id, int a_op, struct flock *a_fl, | |
3290 | * int a_flags) | |
984263bc MD |
3291 | */ |
3292 | static int | |
e851b29e | 3293 | nfs_advlock(struct vop_advlock_args *ap) |
984263bc | 3294 | { |
40393ded | 3295 | struct nfsnode *np = VTONFS(ap->a_vp); |
984263bc MD |
3296 | |
3297 | /* | |
3298 | * The following kludge is to allow diskless support to work | |
3299 | * until a real NFS lockd is implemented. Basically, just pretend | |
3300 | * that this is a local lock. | |
3301 | */ | |
3302 | return (lf_advlock(ap, &(np->n_lockf), np->n_size)); | |
3303 | } | |
3304 | ||
3305 | /* | |
3306 | * Print out the contents of an nfsnode. | |
e851b29e CP |
3307 | * |
3308 | * nfs_print(struct vnode *a_vp) | |
984263bc MD |
3309 | */ |
3310 | static int | |
e851b29e | 3311 | nfs_print(struct vop_print_args *ap) |
984263bc | 3312 | { |
40393ded RG |
3313 | struct vnode *vp = ap->a_vp; |
3314 | struct nfsnode *np = VTONFS(vp); | |
984263bc | 3315 | |
50626622 | 3316 | kprintf("tag VT_NFS, fileid %lld fsid 0x%x", |
973c11b9 | 3317 | (long long)np->n_vattr.va_fileid, np->n_vattr.va_fsid); |
984263bc MD |
3318 | if (vp->v_type == VFIFO) |
3319 | fifo_printinfo(vp); | |
086c1d7e | 3320 | kprintf("\n"); |
984263bc MD |
3321 | return (0); |
3322 | } | |
3323 | ||
984263bc MD |
3324 | /* |
3325 | * nfs special file access vnode op. | |
3326 | * Essentially just get vattr and then imitate iaccess() since the device is | |
3327 | * local to the client. | |
e851b29e | 3328 | * |
b478fdce | 3329 | * nfsspec_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred) |
984263bc MD |
3330 | */ |
3331 | static int | |
e851b29e | 3332 | nfsspec_access(struct vop_access_args *ap) |
984263bc | 3333 | { |
40393ded RG |
3334 | struct vattr *vap; |
3335 | gid_t *gp; | |
3336 | struct ucred *cred = ap->a_cred; | |
984263bc MD |
3337 | struct vnode *vp = ap->a_vp; |
3338 | mode_t mode = ap->a_mode; | |
3339 | struct vattr vattr; | |
40393ded | 3340 | int i; |
984263bc MD |
3341 | int error; |
3342 | ||
3343 | /* | |
3344 | * Disallow write attempts on filesystems mounted read-only; | |
3345 | * unless the file is a socket, fifo, or a block or character | |
3346 | * device resident on the filesystem. | |
3347 | */ | |
3348 | if ((mode & VWRITE) && (vp->v_mount->mnt_flag & MNT_RDONLY)) { | |
3349 | switch (vp->v_type) { | |
3350 | case VREG: | |
3351 | case VDIR: | |
3352 | case VLNK: | |
3353 | return (EROFS); | |
3354 | default: | |
3355 | break; | |
3356 | } | |
3357 | } | |
3358 | /* | |
3359 | * If you're the super-user, | |
3360 | * you always get access. | |
3361 | */ | |
3362 | if (cred->cr_uid == 0) | |
3363 | return (0); | |
3364 | vap = &vattr; | |
87de5057 | 3365 | error = VOP_GETATTR(vp, vap); |
984263bc MD |
3366 | if (error) |
3367 | return (error); | |
3368 | /* | |
3369 | * Access check is based on only one of owner, group, public. | |
3370 | * If not owner, then check group. If not a member of the | |
3371 | * group, then check public access. | |
3372 | */ | |
3373 | if (cred->cr_uid != vap->va_uid) { | |
3374 | mode >>= 3; | |
3375 | gp = cred->cr_groups; | |
3376 | for (i = 0; i < cred->cr_ngroups; i++, gp++) | |
3377 | if (vap->va_gid == *gp) | |
3378 | goto found; | |
3379 | mode >>= 3; | |
3380 | found: | |
3381 | ; | |
3382 | } | |
3383 | error = (vap->va_mode & mode) == mode ? 0 : EACCES; | |
3384 | return (error); | |
3385 | } | |
3386 | ||
3387 | /* | |
3388 | * Read wrapper for special devices. | |
e851b29e CP |
3389 | * |
3390 | * nfsspec_read(struct vnode *a_vp, struct uio *a_uio, int a_ioflag, | |
3391 | * struct ucred *a_cred) | |
984263bc MD |
3392 | */ |
3393 | static int | |
e851b29e | 3394 | nfsspec_read(struct vop_read_args *ap) |
984263bc | 3395 | { |
40393ded | 3396 | struct nfsnode *np = VTONFS(ap->a_vp); |
984263bc MD |
3397 | |
3398 | /* | |
3399 | * Set access flag. | |
3400 | */ | |
3401 | np->n_flag |= NACC; | |
3402 | getnanotime(&np->n_atim); | |
66a1ddf5 | 3403 | return (VOCALL(&spec_vnode_vops, &ap->a_head)); |
984263bc MD |
3404 | } |
3405 | ||
3406 | /* | |
3407 | * Write wrapper for special devices. | |
e |