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
9 * Portions Copyright (c) 2003 Apple Computer, Inc.
13 * afs_vnop_attrs.c - setattr and getattr vnodeops
23 #include <afsconfig.h>
24 #include "afs/param.h"
29 #include "afs/sysincludes.h" /* Standard vendor system headers */
30 #include "afsincludes.h" /* Afs-based standard headers */
31 #include "afs/afs_stats.h" /* statistics */
32 #include "afs/afs_cbqueue.h"
33 #include "afs/nfsclient.h"
34 #include "afs/afs_osidnlc.h"
36 extern afs_rwlock_t afs_xcbhash;
37 struct afs_exporter *afs_nfsexporter;
38 extern struct vcache *afs_globalVp;
39 #if defined(AFS_HPUX110_ENV)
40 extern struct vfs *afs_globalVFS;
43 /* copy out attributes from cache entry */
45 afs_CopyOutAttrs(register struct vcache *avc, register struct vattr *attrs)
47 register struct volume *tvp;
48 register struct cell *tcell;
51 AFS_STATCNT(afs_CopyOutAttrs);
52 if (afs_fakestat_enable && avc->mvstat == 1)
54 attrs->va_type = fakedir ? VDIR : vType(avc);
55 #if defined(AFS_SGI_ENV) || defined(AFS_AIX32_ENV) || defined(AFS_SUN5_ENV)
56 attrs->va_mode = fakedir ? 0755 : (mode_t) (avc->m.Mode & 0xffff);
58 attrs->va_mode = fakedir ? VDIR | 0755 : avc->m.Mode;
61 if (avc->m.Mode & (VSUID | VSGID)) {
62 /* setuid or setgid, make sure we're allowed to run them from this cell */
63 tcell = afs_GetCell(avc->fid.Cell, 0);
64 if (tcell && (tcell->states & CNoSUID))
65 attrs->va_mode &= ~(VSUID | VSGID);
67 #if defined(AFS_DARWIN_ENV)
69 extern u_int32_t afs_darwin_realmodes;
70 if (!afs_darwin_realmodes) {
71 /* Mac OS X uses the mode bits to determine whether a file or
72 * directory is accessible, and believes them, even though under
73 * AFS they're almost assuredly wrong, especially if the local uid
74 * does not match the AFS ID. So we set the mode bits
77 if (S_ISDIR(attrs->va_mode)) {
78 /* all access bits need to be set for directories, since even
79 * a mode 0 directory can still be used normally.
81 attrs->va_mode |= ACCESSPERMS;
83 /* for other files, replicate the user bits to group and other */
84 mode_t ubits = (attrs->va_mode & S_IRWXU) >> 6;
85 attrs->va_mode |= ubits | (ubits << 3);
89 #endif /* AFS_DARWIN_ENV */
90 attrs->va_uid = fakedir ? 0 : avc->m.Owner;
91 attrs->va_gid = fakedir ? 0 : avc->m.Group; /* yeah! */
92 #if defined(AFS_SUN56_ENV)
93 attrs->va_fsid = avc->v.v_vfsp->vfs_fsid.val[0];
94 #elif defined(AFS_OSF_ENV)
95 attrs->va_fsid = avc->v.v_mount->m_stat.f_fsid.val[0];
96 #elif defined(AFS_DARWIN80_ENV)
97 VATTR_RETURN(attrs, va_fsid, vfs_statfs(vnode_mount(AFSTOV(avc)))->f_fsid.val[0]);
98 #elif defined(AFS_DARWIN70_ENV)
99 attrs->va_fsid = avc->v->v_mount->mnt_stat.f_fsid.val[0];
100 #else /* ! AFS_DARWIN70_ENV */
103 if (avc->mvstat == 2) {
104 tvp = afs_GetVolume(&avc->fid, 0, READ_LOCK);
105 /* The mount point's vnode. */
108 afs_calc_inum (tvp->mtpoint.Fid.Volume,
109 tvp->mtpoint.Fid.Vnode);
110 if (FidCmp(&afs_rootFid, &avc->fid) && !attrs->va_nodeid)
111 attrs->va_nodeid = 2;
112 afs_PutVolume(tvp, READ_LOCK);
114 attrs->va_nodeid = 2;
117 afs_calc_inum (avc->fid.Fid.Volume,
119 attrs->va_nodeid &= 0x7fffffff; /* Saber C hates negative inode #s! */
120 attrs->va_nlink = fakedir ? 100 : avc->m.LinkCount;
121 attrs->va_size = fakedir ? 4096 : avc->m.Length;
122 attrs->va_atime.tv_sec = attrs->va_mtime.tv_sec = attrs->va_ctime.tv_sec =
123 fakedir ? 0 : (int)avc->m.Date;
124 /* set microseconds to be dataversion # so that we approximate NFS-style
125 * use of mtime as a dataversion #. We take it mod 512K because
126 * microseconds *must* be less than a million, and 512K is the biggest
127 * power of 2 less than such. DataVersions are typically pretty small
128 * anyway, so the difference between 512K and 1000000 shouldn't matter
129 * much, and "&" is a lot faster than "%".
131 #if defined(AFS_DARWIN_ENV) || defined(AFS_FBSD_ENV)
132 /* nfs on these systems puts an 0 in nsec and stores the nfs usec (aka
133 * dataversion) in va_gen */
135 attrs->va_atime.tv_nsec = attrs->va_mtime.tv_nsec =
136 attrs->va_ctime.tv_nsec = 0;
137 attrs->va_gen = hgetlo(avc->m.DataVersion);
138 #elif defined(AFS_SGI_ENV) || defined(AFS_SUN5_ENV) || defined(AFS_AIX41_ENV) || defined(AFS_OBSD_ENV)
139 attrs->va_atime.tv_nsec = attrs->va_mtime.tv_nsec =
140 attrs->va_ctime.tv_nsec =
141 (hgetlo(avc->m.DataVersion) & 0x7ffff) * 1000;
143 attrs->va_atime.tv_usec = attrs->va_mtime.tv_usec =
144 attrs->va_ctime.tv_usec = (hgetlo(avc->m.DataVersion) & 0x7ffff);
146 #if defined(AFS_DARWIN_ENV) || defined(AFS_XBSD_ENV) || defined(AFS_OSF_ENV)
149 #if defined(AFS_SGI_ENV) || defined(AFS_SUN5_ENV)
150 attrs->va_blksize = PAGESIZE; /* XXX Was 8192 XXX */
152 attrs->va_blocksize = PAGESIZE; /* XXX Was 8192 XXX */
155 #if defined(AFS_HPUX110_ENV)
157 attrs->va_fstype = afs_globalVFS->vfs_mtype;
161 * Below return 0 (and not 1) blocks if the file is zero length. This conforms
162 * better with the other filesystems that do return 0.
164 #if defined(AFS_OSF_ENV) || defined(AFS_DARWIN_ENV) || defined(AFS_XBSD_ENV)
165 attrs->va_bytes = (attrs->va_size ? (attrs->va_size + 1023) : 1024);
167 attrs->va_bytes_rsv = -1;
169 #elif defined(AFS_HPUX_ENV)
170 attrs->va_blocks = (attrs->va_size ? ((attrs->va_size + 1023)>>10) : 0);
171 #elif defined(AFS_SGI_ENV)
172 attrs->va_blocks = BTOBB(attrs->va_size);
173 #elif defined(AFS_SUN5_ENV)
174 attrs->va_nblocks = (attrs->va_size ? ((attrs->va_size + 1023)>>10)<<1:0);
175 #else /* everything else */
176 attrs->va_blocks = (attrs->va_size ? ((attrs->va_size + 1023)>>10)<<1:0);
183 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
185 afs_getattr(OSI_VC_DECL(avc), struct vattr *attrs, int flags,
186 struct AFS_UCRED *acred)
189 afs_getattr(OSI_VC_DECL(avc), struct vattr *attrs, struct AFS_UCRED *acred)
193 struct vrequest treq;
194 extern struct unixuser *afs_FindUser();
199 AFS_STATCNT(afs_getattr);
200 afs_Trace2(afs_iclSetp, CM_TRACE_GETATTR, ICL_TYPE_POINTER, avc,
201 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->m.Length));
203 if (afs_fakestat_enable && avc->mvstat == 1) {
204 struct afs_fakestat_state fakestat;
206 code = afs_InitReq(&treq, acred);
209 afs_InitFakeStat(&fakestat);
210 code = afs_TryEvalFakeStat(&avc, &fakestat, &treq);
212 afs_PutFakeStat(&fakestat);
216 code = afs_CopyOutAttrs(avc, attrs);
217 afs_PutFakeStat(&fakestat);
220 #if defined(AFS_SUN5_ENV)
221 if (flags & ATTR_HINT) {
222 code = afs_CopyOutAttrs(avc, attrs);
226 #if defined(AFS_DARWIN_ENV) && !defined(AFS_DARWIN80_ENV)
227 if (avc->states & CUBCinit) {
228 code = afs_CopyOutAttrs(avc, attrs);
233 #ifdef AFS_BOZONLOCK_ENV
234 afs_BozonLock(&avc->pvnLock, avc);
237 if (afs_shuttingdown)
240 if (!(avc->states & CStatd)) {
241 if (!(code = afs_InitReq(&treq, acred))) {
242 code = afs_VerifyVCache2(avc, &treq);
248 #ifdef AFS_BOZONLOCK_ENV
250 osi_FlushPages(avc, acred);
251 afs_BozonUnlock(&avc->pvnLock, avc);
256 osi_FlushText(avc); /* only needed to flush text if text locked last time */
257 code = afs_CopyOutAttrs(avc, attrs);
259 if (afs_nfsexporter) {
261 if ((code = afs_InitReq(&treq, acred)))
265 if (AFS_NFSXLATORREQ(acred)) {
266 if ((vType(avc) != VDIR)
267 && !afs_AccessOK(avc, PRSFS_READ, &treq,
269 CMB_ALLOW_EXEC_AS_READ)) {
273 if ((au = afs_FindUser(treq.uid, -1, READ_LOCK))) {
274 register struct afs_exporter *exporter = au->exporter;
276 if (exporter && !(afs_nfsexporter->exp_states & EXP_UNIXMODE)) {
279 * If the remote user wishes to enforce default Unix mode semantics,
280 * like in the nfs exporter case, we OR in the user bits
281 * into the group and other bits. We need to do this
282 * because there is no RFS_ACCESS call and thus nfs
283 * clients implement nfs_access by interpreting the
284 * mode bits in the traditional way, which of course
287 ubits = (attrs->va_mode & 0700) >> 6;
288 attrs->va_mode = attrs->va_mode | ubits | (ubits << 3);
289 /* If it's the root of AFS, replace the inode number with the
290 * inode number of the mounted on directory; otherwise this
291 * confuses getwd()... */
292 #ifdef AFS_LINUX22_ENV
293 if (avc == afs_globalVp) {
294 struct inode *ip = AFSTOV(avc)->i_sb->s_root->d_inode;
295 attrs->va_nodeid = ip->i_ino; /* VTOI()? */
299 #ifdef AFS_DARWIN_ENV
300 vnode_isvroot(AFSTOV(avc))
302 AFSTOV(avc)->v_flag & VROOT
305 struct vnode *vp = AFSTOV(avc);
307 #ifdef AFS_DARWIN80_ENV
308 /* XXX vp = vnode_mount(vp)->mnt_vnodecovered; */
311 vp = vp->v_vfsp->vfs_vnodecovered;
312 if (vp) { /* Ignore weird failures */
314 attrs->va_nodeid = VnodeToIno(vp);
318 ip = (struct inode *)VTOI(vp);
319 if (ip) /* Ignore weird failures */
320 attrs->va_nodeid = ip->i_number;
325 #endif /* AFS_LINUX22_ENV */
327 afs_PutUser(au, READ_LOCK);
333 code = afs_CheckCode(code, &treq, 14);
337 /* convert a Unix request into a status store request */
339 afs_VAttrToAS(register struct vcache *avc, register struct vattr *av,
340 register struct AFSStoreStatus *as)
344 AFS_STATCNT(afs_VAttrToAS);
345 #if defined(AFS_DARWIN80_ENV)
346 if (VATTR_IS_ACTIVE(av, va_mode)) {
347 #elif defined(AFS_AIX_ENV)
348 /* Boy, was this machine dependent bogosity hard to swallow????.... */
349 if (av->va_mode != -1) {
350 #elif defined(AFS_LINUX22_ENV)
351 if (av->va_mask & ATTR_MODE) {
352 #elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
353 if (av->va_mask & AT_MODE) {
354 #elif defined(AFS_XBSD_ENV)
355 if (av->va_mode != (mode_t)VNOVAL) {
357 if (av->va_mode != ((unsigned short)-1)) {
360 as->UnixModeBits = av->va_mode & 0xffff;
361 if (avc->states & CForeign) {
362 ObtainWriteLock(&avc->lock, 127);
363 afs_FreeAllAxs(&(avc->Access));
364 ReleaseWriteLock(&avc->lock);
367 #if defined(AFS_DARWIN80_ENV)
368 if (VATTR_IS_ACTIVE(av, va_gid)) {
369 #elif defined(AFS_LINUX22_ENV)
370 if (av->va_mask & ATTR_GID) {
371 #elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
372 if (av->va_mask & AT_GID) {
373 #elif defined(AFS_HPUX_ENV)
374 #if defined(AFS_HPUX102_ENV)
375 if (av->va_gid != GID_NO_CHANGE) {
377 if (av->va_gid != ((unsigned short)-1)) {
379 #elif defined(AFS_XBSD_ENV)
380 if (av->va_gid != (gid_t)VNOVAL) {
382 if (av->va_gid != -1) {
383 #endif /* AFS_LINUX22_ENV */
384 mask |= AFS_SETGROUP;
385 as->Group = av->va_gid;
387 #if defined(AFS_DARWIN80_ENV)
388 if (VATTR_IS_ACTIVE(av, va_uid)) {
389 #elif defined(AFS_LINUX22_ENV)
390 if (av->va_mask & ATTR_UID) {
391 #elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
392 if (av->va_mask & AT_UID) {
393 #elif defined(AFS_HPUX_ENV)
394 #if defined(AFS_HPUX102_ENV)
395 if (av->va_uid != UID_NO_CHANGE) {
396 #elif defined(AFS_XBSD_ENV)
397 if (av->va_uid != (uid_t)VNOVAL) {
399 if (av->va_uid != ((unsigned short)-1)) {
402 if (av->va_uid != -1) {
403 #endif /* AFS_LINUX22_ENV */
404 mask |= AFS_SETOWNER;
405 as->Owner = av->va_uid;
407 #if defined(AFS_DARWIN80_ENV)
408 if (VATTR_IS_ACTIVE(av, va_modify_time)) {
409 #elif defined(AFS_LINUX22_ENV)
410 if (av->va_mask & ATTR_MTIME) {
411 #elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
412 if (av->va_mask & AT_MTIME) {
414 if (av->va_mtime.tv_sec != -1) {
416 mask |= AFS_SETMODTIME;
418 #if defined(AFS_SUN5_ENV) || defined(AFS_AIX41_ENV) || defined(AFS_DARWIN_ENV) || defined(AFS_XBSD_ENV)
419 if (av->va_mtime.tv_nsec == -1)
421 if (av->va_mtime.tv_usec == -1)
423 as->ClientModTime = osi_Time(); /* special Sys V compat hack for Suns */
426 as->ClientModTime = av->va_mtime.tv_sec;
432 /* We don't set CDirty bit in avc->states because setattr calls WriteVCache
433 * synchronously, therefore, it's not needed.
435 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
437 afs_setattr(OSI_VC_DECL(avc), register struct vattr *attrs, int flags,
438 struct AFS_UCRED *acred)
441 afs_setattr(OSI_VC_DECL(avc), register struct vattr *attrs,
442 struct AFS_UCRED *acred)
445 struct vrequest treq;
446 struct AFSStoreStatus astat;
447 register afs_int32 code;
448 struct afs_fakestat_state fakestate;
451 AFS_STATCNT(afs_setattr);
452 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV) || defined(AFS_LINUX22_ENV)
453 afs_Trace4(afs_iclSetp, CM_TRACE_SETATTR, ICL_TYPE_POINTER, avc,
454 ICL_TYPE_INT32, attrs->va_mask, ICL_TYPE_OFFSET,
455 ICL_HANDLE_OFFSET(attrs->va_size), ICL_TYPE_OFFSET,
456 ICL_HANDLE_OFFSET(avc->m.Length));
458 afs_Trace4(afs_iclSetp, CM_TRACE_SETATTR, ICL_TYPE_POINTER, avc,
459 ICL_TYPE_INT32, attrs->va_mode, ICL_TYPE_OFFSET,
460 ICL_HANDLE_OFFSET(attrs->va_size), ICL_TYPE_OFFSET,
461 ICL_HANDLE_OFFSET(avc->m.Length));
463 if ((code = afs_InitReq(&treq, acred)))
466 afs_InitFakeStat(&fakestate);
467 code = afs_EvalFakeStat(&avc, &fakestate, &treq);
471 if (avc->states & CRO) {
475 #if defined(AFS_SGI_ENV)
476 /* ignore ATTR_LAZY calls - they are really only for keeping
477 * the access/mtime of mmaped files up to date
479 if (flags & ATTR_LAZY)
482 /* if file size has changed, we need write access, otherwise (e.g.
483 * chmod) give it a shot; if it fails, we'll discard the status
486 #if defined(AFS_DARWIN80_ENV)
487 if (VATTR_IS_ACTIVE(attrs, va_data_size)) {
488 #elif defined(AFS_LINUX22_ENV)
489 if (attrs->va_mask & ATTR_SIZE) {
490 #elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
491 if (attrs->va_mask & AT_SIZE) {
492 #elif defined(AFS_OSF_ENV) || defined(AFS_XBSD_ENV)
493 if (attrs->va_size != VNOVAL) {
494 #elif defined(AFS_AIX41_ENV)
495 if (attrs->va_size != -1) {
497 if (attrs->va_size != ~0) {
499 if (!afs_AccessOK(avc, PRSFS_WRITE, &treq, DONT_CHECK_MODE_BITS)) {
505 afs_VAttrToAS(avc, attrs, &astat); /* interpret request */
507 #ifdef AFS_BOZONLOCK_ENV
508 afs_BozonLock(&avc->pvnLock, avc);
510 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
511 if (AFS_NFSXLATORREQ(acred)) {
512 avc->execsOrWriters++;
516 #if defined(AFS_SGI_ENV)
517 AFS_RWLOCK((vnode_t *) avc, VRWLOCK_WRITE);
519 #if defined(AFS_DARWIN80_ENV)
520 if (VATTR_IS_ACTIVE(attrs, va_data_size)) {
521 #elif defined(AFS_LINUX22_ENV)
522 if (attrs->va_mask & ATTR_SIZE) {
523 #elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
524 if (attrs->va_mask & AT_SIZE) {
525 #elif defined(AFS_OSF_ENV) || defined(AFS_XBSD_ENV)
526 if (attrs->va_size != VNOVAL) {
528 if (attrs->va_size != -1) {
530 afs_size_t tsize = attrs->va_size;
531 ObtainWriteLock(&avc->lock, 128);
532 avc->states |= CDirty;
533 code = afs_TruncateAllSegments(avc, tsize, &treq, acred);
534 /* if date not explicitly set by this call, set it ourselves, since we
535 * changed the data */
536 if (!(astat.Mask & AFS_SETMODTIME)) {
537 astat.Mask |= AFS_SETMODTIME;
538 astat.ClientModTime = osi_Time();
541 if (((avc->execsOrWriters <= 0) && (avc->states & CCreating) == 0)
542 || (avc->execsOrWriters == 1 && AFS_NFSXLATORREQ(acred))) {
543 code = afs_StoreAllSegments(avc, &treq, AFS_ASYNC);
545 avc->states &= ~CDirty;
548 avc->states &= ~CDirty;
550 ReleaseWriteLock(&avc->lock);
552 osi_FlushText(avc); /* do this after releasing all locks */
555 ObtainSharedLock(&avc->lock, 16); /* lock entry */
556 code = afs_WriteVCache(avc, &astat, &treq); /* send request */
557 ReleaseSharedLock(&avc->lock); /* release lock */
560 ObtainWriteLock(&afs_xcbhash, 487);
561 afs_DequeueCallback(avc);
562 avc->states &= ~CStatd;
563 ReleaseWriteLock(&afs_xcbhash);
564 if (avc->fid.Fid.Vnode & 1 || (vType(avc) == VDIR))
565 osi_dnlc_purgedp(avc);
566 /* error? erase any changes we made to vcache entry */
568 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
569 if (AFS_NFSXLATORREQ(acred)) {
570 avc->execsOrWriters--;
573 #ifdef AFS_BOZONLOCK_ENV
574 afs_BozonUnlock(&avc->pvnLock, avc);
576 #if defined(AFS_SGI_ENV)
577 AFS_RWUNLOCK((vnode_t *) avc, VRWLOCK_WRITE);
580 afs_PutFakeStat(&fakestate);
581 code = afs_CheckCode(code, &treq, 15);