2 * Copyright 2000, International Business Machines Corporation and others.
5 * This software has been released under the terms of the IBM Public
6 * License. For details, see the LICENSE file in the top-level source
7 * directory or online at http://www.openafs.org/dl/license10.html
11 * afs_vnop_attrs.c - setattr and getattr vnodeops
21 #include <afsconfig.h>
22 #include "../afs/param.h"
26 #include "../afs/sysincludes.h" /* Standard vendor system headers */
27 #include "../afs/afsincludes.h" /* Afs-based standard headers */
28 #include "../afs/afs_stats.h" /* statistics */
29 #include "../afs/afs_cbqueue.h"
30 #include "../afs/nfsclient.h"
31 #include "../afs/afs_osidnlc.h"
33 extern afs_rwlock_t afs_xcbhash;
34 struct afs_exporter *afs_nfsexporter;
35 extern struct vcache *afs_globalVp;
37 /* copy out attributes from cache entry */
38 afs_CopyOutAttrs(avc, attrs)
39 register struct vattr *attrs;
40 register struct vcache *avc; {
41 register struct volume *tvp;
42 register struct cell *tcell;
45 AFS_STATCNT(afs_CopyOutAttrs);
46 #if defined(AFS_MACH_ENV )
47 attrs->va_mode = vType(avc) | (avc->m.Mode&~VFMT);
48 #else /* AFS_MACH_ENV */
49 attrs->va_type = vType(avc);
50 #if defined(AFS_SGI_ENV) || defined(AFS_AIX32_ENV) || defined(AFS_SUN5_ENV)
51 attrs->va_mode = (mode_t)(avc->m.Mode & 0xffff);
53 attrs->va_mode = avc->m.Mode;
55 #endif /* AFS_MACH_ENV */
57 if (avc->m.Mode & (VSUID|VSGID)) {
58 /* setuid or setgid, make sure we're allowed to run them from this cell */
59 tcell = afs_GetCell(avc->fid.Cell, 0);
60 if (tcell && (tcell->states & CNoSUID))
61 attrs->va_mode &= ~(VSUID|VSGID);
63 attrs->va_uid = avc->m.Owner;
64 attrs->va_gid = avc->m.Group; /* yeah! */
65 #if defined(AFS_SUN56_ENV)
66 attrs->va_fsid = avc->v.v_vfsp->vfs_fsid.val[0];
69 /* XXX We try making this match the vfs's dev field XXX */
73 attrs->va_fsid = avc->v.v_mount->m_stat.f_fsid.val[0];
78 #endif /* AFS_SUN56_ENV */
79 if (avc->mvstat == 2) {
80 tvp = afs_GetVolume(&avc->fid, 0, READ_LOCK);
81 /* The mount point's vnode. */
84 tvp->mtpoint.Fid.Vnode + (tvp->mtpoint.Fid.Volume << 16);
85 if (FidCmp(&afs_rootFid, &avc->fid) && !attrs->va_nodeid)
87 afs_PutVolume(tvp, READ_LOCK);
89 else attrs->va_nodeid = 2;
91 else attrs->va_nodeid = avc->fid.Fid.Vnode + (avc->fid.Fid.Volume << 16);
92 attrs->va_nodeid &= 0x7fffffff; /* Saber C hates negative inode #s! */
93 attrs->va_nlink = avc->m.LinkCount;
94 attrs->va_size = avc->m.Length;
95 attrs->va_atime.tv_sec = attrs->va_mtime.tv_sec = attrs->va_ctime.tv_sec =
97 /* set microseconds to be dataversion # so that we approximate NFS-style
98 * use of mtime as a dataversion #. We take it mod 512K because
99 * microseconds *must* be less than a million, and 512K is the biggest
100 * power of 2 less than such. DataVersions are typically pretty small
101 * anyway, so the difference between 512K and 1000000 shouldn't matter
102 * much, and "&" is a lot faster than "%".
104 #if defined(AFS_DARWIN_ENV) || defined(AFS_FBSD_ENV)
105 /* nfs on these systems puts an 0 in nsec and stores the nfs usec (aka
106 dataversion) in va_gen */
108 attrs->va_atime.tv_nsec = attrs->va_mtime.tv_nsec =
109 attrs->va_ctime.tv_nsec =0;
110 attrs->va_blocksize = PAGESIZE; /* XXX Was 8192 XXX */
111 attrs->va_gen = hgetlo(avc->m.DataVersion);
114 #if defined(AFS_SGI_ENV) || defined(AFS_SUN5_ENV) || defined(AFS_AIX41_ENV)
115 attrs->va_atime.tv_nsec = attrs->va_mtime.tv_nsec =
116 attrs->va_ctime.tv_nsec =
117 (hgetlo(avc->m.DataVersion) & 0x7ffff) * 1000;
118 #if defined(AFS_AIX41_ENV) || defined(AFS_DARWIN_ENV) || defined(AFS_FBSD_ENV)
119 attrs->va_blocksize = PAGESIZE; /* XXX Was 8192 XXX */
121 attrs->va_blksize = PAGESIZE; /* XXX Was 8192 XXX */
124 attrs->va_atime.tv_usec = attrs->va_mtime.tv_usec =
125 attrs->va_ctime.tv_usec =
126 (hgetlo(avc->m.DataVersion) & 0x7ffff);
127 attrs->va_blocksize = PAGESIZE; /* XXX Was 8192 XXX */
131 /* Have to use real device #s in Ultrix, since that's how FS type is
132 * encoded. If rdev doesn't match Ultrix equivalent of statfs's rdev, then
133 * "df ." doesn't work.
135 if (afs_globalVFS && afs_globalVFS->vfs_data)
136 attrs->va_rdev = ((struct mount *)(afs_globalVFS->vfs_data))->m_dev;
138 attrs->va_rdev = 1; /* better than nothing */
143 * Below return 0 (and not 1) blocks if the file is zero length. This conforms
144 * better with the other filesystems that do return 0.
146 #if defined(AFS_OSF_ENV)
148 attrs->va_size_rsv = 0;
151 /* attrs->va_gen = avc->m.DataVersion;*/
153 #endif /* AFS_OSF_ENV || AFS_DARWIN_ENV */
155 #if !defined(AFS_OSF_ENV) && !defined(AFS_DARWIN_ENV) && !defined(AFS_FBSD_ENV)
156 #if !defined(AFS_HPUX_ENV)
158 attrs->va_nblocks = (attrs->va_size? ((attrs->va_size + 1023)>>10) << 1 : 0);
160 #if defined(AFS_SGI_ENV)
161 attrs->va_blocks = BTOBB(attrs->va_size);
163 attrs->va_blocks = (attrs->va_size? ((attrs->va_size + 1023)>>10) << 1 : 0);
166 #else /* !defined(AFS_HPUX_ENV) */
167 attrs->va_blocks = (attrs->va_size? ((attrs->va_size + 1023)>>10) : 0);
168 #endif /* !defined(AFS_HPUX_ENV) */
169 #else /* ! AFS_OSF_ENV && !AFS_FBSD_ENV */
170 attrs->va_bytes = (attrs->va_size? (attrs->va_size + 1023) : 1024);
172 attrs->va_bytes_rsv = -1;
174 #endif /* ! AFS_OSF_ENV */
176 #ifdef AFS_LINUX22_ENV
177 /* And linux has it's own stash as well. */
178 vattr2inode((struct inode*)avc, attrs);
185 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
186 afs_getattr(OSI_VC_ARG(avc), attrs, flags, acred)
189 afs_getattr(OSI_VC_ARG(avc), attrs, acred)
193 struct AFS_UCRED *acred;
196 struct vrequest treq;
197 extern struct unixuser *afs_FindUser();
202 AFS_STATCNT(afs_getattr);
203 afs_Trace2(afs_iclSetp, CM_TRACE_GETATTR, ICL_TYPE_POINTER, avc,
204 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->m.Length));
206 #if defined(AFS_SUN5_ENV)
207 if (flags & ATTR_HINT) {
208 code = afs_CopyOutAttrs(avc, attrs);
213 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV) || defined(AFS_SUN5_ENV)
214 afs_BozonLock(&avc->pvnLock, avc);
217 if (afs_shuttingdown) return EIO;
219 if (!(avc->states & CStatd)) {
220 if (!(code = afs_InitReq(&treq, acred))) {
221 code = afs_VerifyVCache2(avc, &treq);
227 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV) || defined(AFS_SUN5_ENV)
228 if (code == 0) osi_FlushPages(avc, acred);
229 afs_BozonUnlock(&avc->pvnLock, avc);
234 osi_FlushText(avc); /* only needed to flush text if text locked last time */
235 code = afs_CopyOutAttrs(avc, attrs);
237 if (afs_nfsexporter) {
239 if (code = afs_InitReq(&treq, acred))
243 if (AFS_NFSXLATORREQ(acred)) {
244 if ((vType(avc) != VDIR) &&
245 !afs_AccessOK(avc, PRSFS_READ, &treq,
246 CHECK_MODE_BITS|CMB_ALLOW_EXEC_AS_READ)) {
249 if (avc->mvstat == 2) {
250 #if defined(AFS_SGI_ENV) || defined(AFS_SUN5_ENV) || defined(AFS_AIX41_ENV) || defined(AFS_DARWIN_ENV) || defined(AFS_FBSD_ENV)
251 attrs->va_mtime.tv_nsec += ((++avc->xlatordv) * 1000);
253 attrs->va_mtime.tv_usec += ++avc->xlatordv;
257 if (au = afs_FindUser(treq.uid, -1, READ_LOCK)) {
258 register struct afs_exporter *exporter = au->exporter;
260 if (exporter && !(afs_nfsexporter->exp_states & EXP_UNIXMODE)) {
263 * If the remote user wishes to enforce default Unix mode semantics,
264 * like in the nfs exporter case, we OR in the user bits
265 * into the group and other bits. We need to do this
266 * because there is no RFS_ACCESS call and thus nfs
267 * clients implement nfs_access by interpreting the
268 * mode bits in the traditional way, which of course
271 ubits = (attrs->va_mode & 0700) >> 6;
272 attrs->va_mode = attrs->va_mode | ubits | (ubits << 3);
273 /* If it's the root of AFS, replace the inode number with the
274 * inode number of the mounted on directory; otherwise this
275 * confuses getwd()... */
276 #ifdef AFS_LINUX22_ENV
277 if (avc == afs_globalVp) {
278 struct inode *ip = avc->v.i_sb->s_root->d_inode;
279 attrs->va_nodeid = ip->i_ino;
282 if (avc->v.v_flag & VROOT) {
283 struct vnode *vp = (struct vnode *)avc;
285 vp = vp->v_vfsp->vfs_vnodecovered;
286 if (vp) { /* Ignore weird failures */
288 attrs->va_nodeid = VnodeToIno(vp);
292 ip = (struct inode *) VTOI(vp);
293 if (ip) /* Ignore weird failures */
294 attrs->va_nodeid = ip->i_number;
298 #endif /* AFS_LINUX22_ENV */
300 afs_PutUser(au, READ_LOCK);
306 code = afs_CheckCode(code, &treq, 14);
310 /* convert a Unix request into a status store request */
311 afs_VAttrToAS(avc, av, as)
312 register struct vcache *avc;
313 register struct vattr *av;
314 register struct AFSStoreStatus *as; {
317 AFS_STATCNT(afs_VAttrToAS);
318 #if defined(AFS_AIX_ENV)
319 /* Boy, was this machine dependent bogosity hard to swallow????.... */
320 if (av->va_mode != -1) {
322 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV) || defined(AFS_LINUX22_ENV)
323 if (av->va_mask & AT_MODE) {
325 if (av->va_mode != ((unsigned short)-1)) {
329 as->UnixModeBits = av->va_mode & 0xffff;
330 if (avc->states & CForeign) {
331 ObtainWriteLock(&avc->lock,127);
332 afs_FreeAllAxs(&(avc->Access));
333 ReleaseWriteLock(&avc->lock);
337 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV) || defined(AFS_LINUX22_ENV)
338 if (av->va_mask & AT_GID) {
340 #if (defined(AFS_HPUX_ENV) || defined(AFS_SUN_ENV))
341 #if defined(AFS_HPUX102_ENV)
342 if (av->va_gid != GID_NO_CHANGE) {
344 if (av->va_gid != ((unsigned short)-1)) {
347 if (av->va_gid != -1) {
349 #endif /* AFS_SUN5_ENV */
350 mask |= AFS_SETGROUP;
351 as->Group = av->va_gid;
354 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV) || defined(AFS_LINUX22_ENV)
355 if (av->va_mask & AT_UID) {
357 #if (defined(AFS_HPUX_ENV) || defined(AFS_SUN_ENV))
358 #if defined(AFS_HPUX102_ENV)
359 if (av->va_uid != UID_NO_CHANGE) {
361 if (av->va_uid != ((unsigned short)-1)) {
364 if (av->va_uid != -1) {
366 #endif /* AFS_SUN5_ENV */
367 mask |= AFS_SETOWNER;
368 as->Owner = av->va_uid;
370 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV) || defined(AFS_LINUX22_ENV)
371 if (av->va_mask & AT_MTIME) {
373 if (av->va_mtime.tv_sec != -1) {
375 mask |= AFS_SETMODTIME;
377 #if defined(AFS_SUN5_ENV) || defined(AFS_AIX41_ENV) || defined(AFS_DARWIN_ENV) || defined(AFS_FBSD_ENV)
378 if (av->va_mtime.tv_nsec == -1)
380 if (av->va_mtime.tv_usec == -1)
382 as->ClientModTime = osi_Time(); /* special Sys V compat hack for Suns */
385 as->ClientModTime = av->va_mtime.tv_sec;
391 /* We don't set CDirty bit in avc->states because setattr calls WriteVCache
392 * synchronously, therefore, it's not needed.
394 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
395 afs_setattr(OSI_VC_ARG(avc), attrs, flags, acred)
398 afs_setattr(avc, attrs, acred)
401 register struct vattr *attrs;
402 struct AFS_UCRED *acred; {
403 struct vrequest treq;
404 struct AFSStoreStatus astat;
405 register afs_int32 code;
408 AFS_STATCNT(afs_setattr);
409 afs_Trace2(afs_iclSetp, CM_TRACE_SETATTR, ICL_TYPE_POINTER, avc,
410 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->m.Length));
411 if (code = afs_InitReq(&treq, acred)) return code;
412 if (avc->states & CRO) {
416 #if defined(AFS_SGI_ENV)
417 /* ignore ATTR_LAZY calls - they are really only for keeping
418 * the access/mtime of mmaped files up to date
420 if (flags & ATTR_LAZY)
424 /* if file size has changed, we need write access, otherwise (e.g.
425 * chmod) give it a shot; if it fails, we'll discard the status
428 * Note that Ultrix actually defines ftruncate of a file you have open to
429 * be O.K., and does the proper access checks itself in the truncate
430 * path (unlike BSD or SUNOS), so we skip this check for Ultrix.
433 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV) || defined(AFS_LINUX22_ENV)
434 if (attrs->va_mask & AT_SIZE) {
437 if (attrs->va_size != VNOVAL) {
440 if (attrs->va_size != -1) {
442 if (attrs->va_size != ~0) {
446 if (!afs_AccessOK(avc, PRSFS_WRITE, &treq, DONT_CHECK_MODE_BITS)) {
453 afs_VAttrToAS(avc, attrs, &astat); /* interpret request */
455 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV) || defined(AFS_SUN5_ENV)
456 afs_BozonLock(&avc->pvnLock, avc);
458 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
459 if (AFS_NFSXLATORREQ(acred)) {
460 avc->execsOrWriters++;
464 #if defined(AFS_SGI_ENV)
465 AFS_RWLOCK((vnode_t *)avc, VRWLOCK_WRITE);
467 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV) || defined(AFS_LINUX22_ENV)
468 if (attrs->va_mask & AT_SIZE) {
470 #if defined(AFS_OSF_ENV)
471 if (attrs->va_size != VNOVAL) {
472 #else /* AFS_OSF_ENV */
473 if (attrs->va_size != -1) {
476 afs_size_t tsize = attrs->va_size;
477 ObtainWriteLock(&avc->lock,128);
478 avc->states |= CDirty;
479 code = afs_TruncateAllSegments(avc, tsize, &treq, acred);
480 /* if date not explicitly set by this call, set it ourselves, since we
481 * changed the data */
482 if (!(astat.Mask & AFS_SETMODTIME)) {
483 astat.Mask |= AFS_SETMODTIME;
484 astat.ClientModTime = osi_Time();
487 if ( ( (avc->execsOrWriters <= 0 ) && (avc->states & CCreating) == 0)
488 || ( avc->execsOrWriters == 1 && AFS_NFSXLATORREQ(acred)) ) {
489 code = afs_StoreAllSegments(avc, &treq, AFS_ASYNC);
491 avc->states &= ~CDirty;
494 avc->states &= ~CDirty;
496 ReleaseWriteLock(&avc->lock);
498 osi_FlushText(avc); /* do this after releasing all locks */
500 /* in case we changed the size here, propagate it to gp->g_size */
501 afs_gfshack((struct gnode *)avc);
505 ObtainSharedLock(&avc->lock,16); /* lock entry */
506 code = afs_WriteVCache(avc, &astat, &treq); /* send request */
507 ReleaseSharedLock(&avc->lock); /* release lock */
510 ObtainWriteLock(&afs_xcbhash, 487);
511 afs_DequeueCallback(avc);
512 avc->states &= ~CStatd;
513 ReleaseWriteLock(&afs_xcbhash);
514 if (avc->fid.Fid.Vnode & 1 || (vType(avc) == VDIR))
515 osi_dnlc_purgedp(avc);
516 /* error? erase any changes we made to vcache entry */
519 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
520 if (AFS_NFSXLATORREQ(acred)) {
521 avc->execsOrWriters--;
524 #if defined(AFS_SUN_ENV) || defined(AFS_OSF_ENV) || defined(AFS_SUN5_ENV)
525 afs_BozonUnlock(&avc->pvnLock, avc);
527 #if defined(AFS_SGI_ENV)
528 AFS_RWUNLOCK((vnode_t *)avc, VRWLOCK_WRITE);
531 code = afs_CheckCode(code, &treq, 15);