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;
44 /* copy out attributes from cache entry */
46 afs_CopyOutAttrs(register struct vcache *avc, register struct vattr *attrs)
48 register struct volume *tvp;
49 register struct cell *tcell;
52 AFS_STATCNT(afs_CopyOutAttrs);
53 if (afs_fakestat_enable && avc->mvstat == 1)
55 attrs->va_type = fakedir ? VDIR : vType(avc);
56 #if defined(AFS_SGI_ENV) || defined(AFS_AIX32_ENV) || defined(AFS_SUN5_ENV)
57 attrs->va_mode = fakedir ? 0755 : (mode_t) (avc->m.Mode & 0xffff);
59 attrs->va_mode = fakedir ? VDIR | 0755 : avc->m.Mode;
62 if (avc->m.Mode & (VSUID | VSGID)) {
63 /* setuid or setgid, make sure we're allowed to run them from this cell */
64 tcell = afs_GetCell(avc->fid.Cell, 0);
65 if (tcell && (tcell->states & CNoSUID))
66 attrs->va_mode &= ~(VSUID | VSGID);
68 #if defined(AFS_DARWIN_ENV)
70 extern u_int32_t afs_darwin_realmodes;
71 if (!afs_darwin_realmodes) {
72 /* Mac OS X uses the mode bits to determine whether a file or
73 * directory is accessible, and believes them, even though under
74 * AFS they're almost assuredly wrong, especially if the local uid
75 * does not match the AFS ID. So we set the mode bits
78 if (S_ISDIR(attrs->va_mode)) {
79 /* all access bits need to be set for directories, since even
80 * a mode 0 directory can still be used normally.
82 attrs->va_mode |= ACCESSPERMS;
84 /* for other files, replicate the user bits to group and other */
85 mode_t ubits = (attrs->va_mode & S_IRWXU) >> 6;
86 attrs->va_mode |= ubits | (ubits << 3);
90 #endif /* AFS_DARWIN_ENV */
91 attrs->va_uid = fakedir ? 0 : avc->m.Owner;
92 attrs->va_gid = fakedir ? 0 : avc->m.Group; /* yeah! */
93 #if defined(AFS_SUN56_ENV)
94 attrs->va_fsid = avc->v.v_vfsp->vfs_fsid.val[0];
95 #elif defined(AFS_OSF_ENV)
96 attrs->va_fsid = avc->v.v_mount->m_stat.f_fsid.val[0];
97 #elif defined(AFS_DARWIN80_ENV)
98 VATTR_RETURN(attrs, va_fsid, vfs_statfs(vnode_mount(AFSTOV(avc)))->f_fsid.val[0]);
99 #elif defined(AFS_DARWIN70_ENV)
100 attrs->va_fsid = avc->v->v_mount->mnt_stat.f_fsid.val[0];
101 #else /* ! AFS_DARWIN70_ENV */
104 if (avc->mvstat == 2) {
105 tvp = afs_GetVolume(&avc->fid, 0, READ_LOCK);
106 /* The mount point's vnode. */
109 afs_calc_inum (tvp->mtpoint.Fid.Volume,
110 tvp->mtpoint.Fid.Vnode);
111 if (FidCmp(&afs_rootFid, &avc->fid) && !attrs->va_nodeid)
112 attrs->va_nodeid = 2;
113 afs_PutVolume(tvp, READ_LOCK);
115 attrs->va_nodeid = 2;
118 afs_calc_inum (avc->fid.Fid.Volume,
120 attrs->va_nodeid &= 0x7fffffff; /* Saber C hates negative inode #s! */
121 attrs->va_nlink = fakedir ? 100 : avc->m.LinkCount;
122 attrs->va_size = fakedir ? 4096 : avc->m.Length;
123 attrs->va_atime.tv_sec = attrs->va_mtime.tv_sec = attrs->va_ctime.tv_sec =
124 fakedir ? 0 : (int)avc->m.Date;
125 /* set microseconds to be dataversion # so that we approximate NFS-style
126 * use of mtime as a dataversion #. We take it mod 512K because
127 * microseconds *must* be less than a million, and 512K is the biggest
128 * power of 2 less than such. DataVersions are typically pretty small
129 * anyway, so the difference between 512K and 1000000 shouldn't matter
130 * much, and "&" is a lot faster than "%".
132 #if defined(AFS_DARWIN_ENV) || defined(AFS_FBSD_ENV)
133 /* nfs on these systems puts an 0 in nsec and stores the nfs usec (aka
134 * dataversion) in va_gen */
136 attrs->va_atime.tv_nsec = attrs->va_mtime.tv_nsec =
137 attrs->va_ctime.tv_nsec = 0;
138 attrs->va_gen = hgetlo(avc->m.DataVersion);
139 #elif defined(AFS_SGI_ENV) || defined(AFS_SUN5_ENV) || defined(AFS_AIX41_ENV) || defined(AFS_OBSD_ENV)
140 attrs->va_atime.tv_nsec = attrs->va_mtime.tv_nsec =
141 attrs->va_ctime.tv_nsec =
142 (hgetlo(avc->m.DataVersion) & 0x7ffff) * 1000;
144 attrs->va_atime.tv_usec = attrs->va_mtime.tv_usec =
145 attrs->va_ctime.tv_usec = (hgetlo(avc->m.DataVersion) & 0x7ffff);
147 #if defined(AFS_DARWIN_ENV) || defined(AFS_XBSD_ENV) || defined(AFS_OSF_ENV)
150 #if defined(AFS_SGI_ENV) || defined(AFS_SUN5_ENV)
151 attrs->va_blksize = AFS_BLKSIZE; /* XXX Was 8192 XXX */
153 attrs->va_blocksize = AFS_BLKSIZE; /* XXX Was 8192 XXX */
156 #if defined(AFS_HPUX110_ENV)
158 attrs->va_fstype = afs_globalVFS->vfs_mtype;
162 * Below return 0 (and not 1) blocks if the file is zero length. This conforms
163 * better with the other filesystems that do return 0.
165 #if defined(AFS_OSF_ENV) || defined(AFS_DARWIN_ENV) || defined(AFS_XBSD_ENV)
166 attrs->va_bytes = (attrs->va_size ? (attrs->va_size + 1023) : 1024);
168 attrs->va_bytes_rsv = -1;
170 #elif defined(AFS_HPUX_ENV)
171 attrs->va_blocks = (attrs->va_size ? ((attrs->va_size + 1023)>>10) : 0);
172 #elif defined(AFS_SGI_ENV)
173 attrs->va_blocks = BTOBB(attrs->va_size);
174 #elif defined(AFS_SUN5_ENV)
175 attrs->va_nblocks = (attrs->va_size ? ((attrs->va_size + 1023)>>10)<<1:0);
176 #else /* everything else */
177 attrs->va_blocks = (attrs->va_size ? ((attrs->va_size + 1023)>>10)<<1:0);
184 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
186 afs_getattr(OSI_VC_DECL(avc), struct vattr *attrs, int flags,
187 struct AFS_UCRED *acred)
190 afs_getattr(OSI_VC_DECL(avc), struct vattr *attrs, struct AFS_UCRED *acred)
194 struct vrequest treq;
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);
235 #ifdef AFS_BOZONLOCK_ENV
236 afs_BozonLock(&avc->pvnLock, avc);
239 if (afs_shuttingdown)
242 if (!(avc->states & CStatd)) {
243 if (!(code = afs_InitReq(&treq, acred))) {
244 code = afs_VerifyVCache2(avc, &treq);
250 #ifdef AFS_BOZONLOCK_ENV
252 osi_FlushPages(avc, acred);
253 afs_BozonUnlock(&avc->pvnLock, avc);
258 osi_FlushText(avc); /* only needed to flush text if text locked last time */
259 code = afs_CopyOutAttrs(avc, attrs);
261 if (afs_nfsexporter) {
263 if ((code = afs_InitReq(&treq, acred)))
267 if (AFS_NFSXLATORREQ(acred)) {
268 if ((vType(avc) != VDIR)
269 && !afs_AccessOK(avc, PRSFS_READ, &treq,
271 CMB_ALLOW_EXEC_AS_READ)) {
275 if ((au = afs_FindUser(treq.uid, -1, READ_LOCK))) {
276 register struct afs_exporter *exporter = au->exporter;
278 if (exporter && !(afs_nfsexporter->exp_states & EXP_UNIXMODE)) {
281 * If the remote user wishes to enforce default Unix mode semantics,
282 * like in the nfs exporter case, we OR in the user bits
283 * into the group and other bits. We need to do this
284 * because there is no RFS_ACCESS call and thus nfs
285 * clients implement nfs_access by interpreting the
286 * mode bits in the traditional way, which of course
289 ubits = (attrs->va_mode & 0700) >> 6;
290 attrs->va_mode = attrs->va_mode | ubits | (ubits << 3);
291 /* If it's the root of AFS, replace the inode number with the
292 * inode number of the mounted on directory; otherwise this
293 * confuses getwd()... */
294 #ifdef AFS_LINUX22_ENV
295 if (avc == afs_globalVp) {
296 struct inode *ip = AFSTOV(avc)->i_sb->s_root->d_inode;
297 attrs->va_nodeid = ip->i_ino; /* VTOI()? */
301 #ifdef AFS_DARWIN_ENV
302 vnode_isvroot(AFSTOV(avc))
304 AFSTOV(avc)->v_flag & VROOT
307 struct vnode *vp = AFSTOV(avc);
309 #ifdef AFS_DARWIN80_ENV
310 /* XXX vp = vnode_mount(vp)->mnt_vnodecovered; */
313 vp = vp->v_vfsp->vfs_vnodecovered;
314 if (vp) { /* Ignore weird failures */
316 attrs->va_nodeid = VnodeToIno(vp);
320 ip = (struct inode *)VTOI(vp);
321 if (ip) /* Ignore weird failures */
322 attrs->va_nodeid = ip->i_number;
327 #endif /* AFS_LINUX22_ENV */
329 afs_PutUser(au, READ_LOCK);
338 code = afs_CheckCode(code, &treq, 14);
342 /* convert a Unix request into a status store request */
344 afs_VAttrToAS(register struct vcache *avc, register struct vattr *av,
345 register struct AFSStoreStatus *as)
349 AFS_STATCNT(afs_VAttrToAS);
350 #if defined(AFS_DARWIN80_ENV)
351 if (VATTR_IS_ACTIVE(av, va_mode)) {
352 #elif defined(AFS_AIX_ENV)
353 /* Boy, was this machine dependent bogosity hard to swallow????.... */
354 if (av->va_mode != -1) {
355 #elif defined(AFS_LINUX22_ENV)
356 if (av->va_mask & ATTR_MODE) {
357 #elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
358 if (av->va_mask & AT_MODE) {
359 #elif defined(AFS_XBSD_ENV)
360 if (av->va_mode != (mode_t)VNOVAL) {
362 if (av->va_mode != ((unsigned short)-1)) {
365 as->UnixModeBits = av->va_mode & 0xffff;
366 if (avc->states & CForeign) {
367 ObtainWriteLock(&avc->lock, 127);
368 afs_FreeAllAxs(&(avc->Access));
369 ReleaseWriteLock(&avc->lock);
372 #if defined(AFS_DARWIN80_ENV)
373 if (VATTR_IS_ACTIVE(av, va_gid)) {
374 #elif defined(AFS_LINUX22_ENV)
375 if (av->va_mask & ATTR_GID) {
376 #elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
377 if (av->va_mask & AT_GID) {
378 #elif defined(AFS_HPUX_ENV)
379 #if defined(AFS_HPUX102_ENV)
380 if (av->va_gid != GID_NO_CHANGE) {
382 if (av->va_gid != ((unsigned short)-1)) {
384 #elif defined(AFS_XBSD_ENV)
385 if (av->va_gid != (gid_t)VNOVAL) {
387 if (av->va_gid != -1) {
388 #endif /* AFS_LINUX22_ENV */
389 mask |= AFS_SETGROUP;
390 as->Group = av->va_gid;
392 #if defined(AFS_DARWIN80_ENV)
393 if (VATTR_IS_ACTIVE(av, va_uid)) {
394 #elif defined(AFS_LINUX22_ENV)
395 if (av->va_mask & ATTR_UID) {
396 #elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
397 if (av->va_mask & AT_UID) {
398 #elif defined(AFS_HPUX_ENV)
399 #if defined(AFS_HPUX102_ENV)
400 if (av->va_uid != UID_NO_CHANGE) {
401 #elif defined(AFS_XBSD_ENV)
402 if (av->va_uid != (uid_t)VNOVAL) {
404 if (av->va_uid != ((unsigned short)-1)) {
407 if (av->va_uid != -1) {
408 #endif /* AFS_LINUX22_ENV */
409 mask |= AFS_SETOWNER;
410 as->Owner = av->va_uid;
412 #if defined(AFS_DARWIN80_ENV)
413 if (VATTR_IS_ACTIVE(av, va_modify_time)) {
414 #elif defined(AFS_LINUX22_ENV)
415 if (av->va_mask & ATTR_MTIME) {
416 #elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
417 if (av->va_mask & AT_MTIME) {
419 if (av->va_mtime.tv_sec != -1) {
421 mask |= AFS_SETMODTIME;
423 #if defined(AFS_SUN5_ENV) || defined(AFS_AIX41_ENV) || defined(AFS_DARWIN_ENV) || defined(AFS_XBSD_ENV)
424 if (av->va_mtime.tv_nsec == -1)
426 if (av->va_mtime.tv_usec == -1)
428 as->ClientModTime = osi_Time(); /* special Sys V compat hack for Suns */
431 as->ClientModTime = av->va_mtime.tv_sec;
437 /* We don't set CDirty bit in avc->states because setattr calls WriteVCache
438 * synchronously, therefore, it's not needed.
440 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
442 afs_setattr(OSI_VC_DECL(avc), register struct vattr *attrs, int flags,
443 struct AFS_UCRED *acred)
446 afs_setattr(OSI_VC_DECL(avc), register struct vattr *attrs,
447 struct AFS_UCRED *acred)
450 struct vrequest treq;
451 struct AFSStoreStatus astat;
452 register afs_int32 code;
453 struct afs_fakestat_state fakestate;
456 AFS_STATCNT(afs_setattr);
457 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV) || defined(AFS_LINUX22_ENV)
458 afs_Trace4(afs_iclSetp, CM_TRACE_SETATTR, ICL_TYPE_POINTER, avc,
459 ICL_TYPE_INT32, attrs->va_mask, ICL_TYPE_OFFSET,
460 ICL_HANDLE_OFFSET(attrs->va_size), ICL_TYPE_OFFSET,
461 ICL_HANDLE_OFFSET(avc->m.Length));
463 afs_Trace4(afs_iclSetp, CM_TRACE_SETATTR, ICL_TYPE_POINTER, avc,
464 ICL_TYPE_INT32, attrs->va_mode, ICL_TYPE_OFFSET,
465 ICL_HANDLE_OFFSET(attrs->va_size), ICL_TYPE_OFFSET,
466 ICL_HANDLE_OFFSET(avc->m.Length));
468 if ((code = afs_InitReq(&treq, acred)))
473 afs_InitFakeStat(&fakestate);
474 code = afs_EvalFakeStat(&avc, &fakestate, &treq);
478 if (avc->states & CRO) {
482 #if defined(AFS_SGI_ENV)
483 /* ignore ATTR_LAZY calls - they are really only for keeping
484 * the access/mtime of mmaped files up to date
486 if (flags & ATTR_LAZY)
489 /* if file size has changed, we need write access, otherwise (e.g.
490 * chmod) give it a shot; if it fails, we'll discard the status
493 #if defined(AFS_DARWIN80_ENV)
494 if (VATTR_IS_ACTIVE(attrs, va_data_size)) {
495 #elif defined(AFS_LINUX22_ENV)
496 if (attrs->va_mask & ATTR_SIZE) {
497 #elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
498 if (attrs->va_mask & AT_SIZE) {
499 #elif defined(AFS_OSF_ENV) || defined(AFS_XBSD_ENV)
500 if (attrs->va_size != VNOVAL) {
501 #elif defined(AFS_AIX41_ENV)
502 if (attrs->va_size != -1) {
504 if (attrs->va_size != ~0) {
506 if (!afs_AccessOK(avc, PRSFS_WRITE, &treq, DONT_CHECK_MODE_BITS)) {
512 if (AFS_IS_DISCONNECTED && !AFS_IS_DISCON_RW) {
517 afs_VAttrToAS(avc, attrs, &astat); /* interpret request */
519 #ifdef AFS_BOZONLOCK_ENV
520 afs_BozonLock(&avc->pvnLock, avc);
522 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
523 if (AFS_NFSXLATORREQ(acred)) {
524 avc->execsOrWriters++;
528 #if defined(AFS_SGI_ENV)
529 AFS_RWLOCK((vnode_t *) avc, VRWLOCK_WRITE);
531 #if defined(AFS_DARWIN80_ENV)
532 if (VATTR_IS_ACTIVE(attrs, va_data_size)) {
533 #elif defined(AFS_LINUX22_ENV)
534 if (attrs->va_mask & ATTR_SIZE) {
535 #elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
536 if (attrs->va_mask & AT_SIZE) {
537 #elif defined(AFS_OSF_ENV) || defined(AFS_XBSD_ENV)
538 if (attrs->va_size != VNOVAL) {
540 if (attrs->va_size != -1) {
542 afs_size_t tsize = attrs->va_size;
543 ObtainWriteLock(&avc->lock, 128);
544 avc->states |= CDirty;
546 code = afs_TruncateAllSegments(avc, tsize, &treq, acred);
547 /* if date not explicitly set by this call, set it ourselves, since we
548 * changed the data */
549 if (!(astat.Mask & AFS_SETMODTIME)) {
550 astat.Mask |= AFS_SETMODTIME;
551 astat.ClientModTime = osi_Time();
555 if (((avc->execsOrWriters <= 0) && (avc->states & CCreating) == 0)
556 || (avc->execsOrWriters == 1 && AFS_NFSXLATORREQ(acred))) {
558 /* Store files now if not disconnected. */
559 /* XXX: AFS_IS_DISCON_RW handled. */
560 if (!AFS_IS_DISCONNECTED) {
561 code = afs_StoreAllSegments(avc, &treq, AFS_ASYNC);
563 avc->states &= ~CDirty;
567 avc->states &= ~CDirty;
569 ReleaseWriteLock(&avc->lock);
571 osi_FlushText(avc); /* do this after releasing all locks */
574 if (!AFS_IS_DISCONNECTED) {
576 ObtainSharedLock(&avc->lock, 16); /* lock entry */
577 code = afs_WriteVCache(avc, &astat, &treq); /* send request */
578 ReleaseSharedLock(&avc->lock); /* release lock */
581 ObtainWriteLock(&afs_xcbhash, 487);
582 afs_DequeueCallback(avc);
583 avc->states &= ~CStatd;
584 ReleaseWriteLock(&afs_xcbhash);
585 if (avc->fid.Fid.Vnode & 1 || (vType(avc) == VDIR))
586 osi_dnlc_purgedp(avc);
587 /* error? erase any changes we made to vcache entry */
590 #if defined(AFS_DISCON_ENV)
593 ObtainSharedLock(&avc->lock, 712);
594 /* Write changes locally. */
595 code = afs_WriteVCacheDiscon(avc, &astat, attrs);
596 ReleaseSharedLock(&avc->lock);
598 } /* if (!AFS_IS_DISCONNECTED) */
600 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
601 if (AFS_NFSXLATORREQ(acred)) {
602 avc->execsOrWriters--;
605 #ifdef AFS_BOZONLOCK_ENV
606 afs_BozonUnlock(&avc->pvnLock, avc);
608 #if defined(AFS_SGI_ENV)
609 AFS_RWUNLOCK((vnode_t *) avc, VRWLOCK_WRITE);
612 afs_PutFakeStat(&fakestate);
615 code = afs_CheckCode(code, &treq, 15);