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"
27 #include "afs/sysincludes.h" /* Standard vendor system headers */
28 #include "afsincludes.h" /* Afs-based standard headers */
29 #include "afs/afs_stats.h" /* statistics */
30 #include "afs/afs_cbqueue.h"
31 #include "afs/nfsclient.h"
32 #include "afs/afs_osidnlc.h"
34 extern afs_rwlock_t afs_xcbhash;
35 struct afs_exporter *afs_nfsexporter;
36 extern struct vcache *afs_globalVp;
37 #if defined(AFS_HPUX110_ENV)
38 extern struct vfs *afs_globalVFS;
42 /* copy out attributes from cache entry */
44 afs_CopyOutAttrs(register struct vcache *avc, register struct vattr *attrs)
46 register struct volume *tvp;
47 register struct cell *tcell;
50 AFS_STATCNT(afs_CopyOutAttrs);
51 if (afs_fakestat_enable && avc->mvstat == 1)
53 attrs->va_type = fakedir ? VDIR : vType(avc);
54 #if defined(AFS_SGI_ENV) || defined(AFS_AIX32_ENV) || defined(AFS_SUN5_ENV)
55 attrs->va_mode = fakedir ? 0755 : (mode_t) (avc->f.m.Mode & 0xffff);
57 attrs->va_mode = fakedir ? VDIR | 0755 : avc->f.m.Mode;
60 if (avc->f.m.Mode & (VSUID | VSGID)) {
61 /* setuid or setgid, make sure we're allowed to run them from this cell */
62 tcell = afs_GetCell(avc->f.fid.Cell, 0);
63 if (tcell && (tcell->states & CNoSUID))
64 attrs->va_mode &= ~(VSUID | VSGID);
66 #if defined(AFS_DARWIN_ENV)
68 extern u_int32_t afs_darwin_realmodes;
69 if (!afs_darwin_realmodes) {
70 /* Mac OS X uses the mode bits to determine whether a file or
71 * directory is accessible, and believes them, even though under
72 * AFS they're almost assuredly wrong, especially if the local uid
73 * does not match the AFS ID. So we set the mode bits
76 if (S_ISDIR(attrs->va_mode)) {
77 /* all access bits need to be set for directories, since even
78 * a mode 0 directory can still be used normally.
80 attrs->va_mode |= ACCESSPERMS;
82 /* for other files, replicate the user bits to group and other */
83 mode_t ubits = (attrs->va_mode & S_IRWXU) >> 6;
84 attrs->va_mode |= ubits | (ubits << 3);
88 #endif /* AFS_DARWIN_ENV */
89 attrs->va_uid = fakedir ? 0 : avc->f.m.Owner;
90 attrs->va_gid = fakedir ? 0 : avc->f.m.Group; /* yeah! */
91 #if defined(AFS_SUN56_ENV)
92 attrs->va_fsid = avc->v.v_vfsp->vfs_fsid.val[0];
93 #elif defined(AFS_DARWIN80_ENV)
94 VATTR_RETURN(attrs, va_fsid, vfs_statfs(vnode_mount(AFSTOV(avc)))->f_fsid.val[0]);
95 #elif defined(AFS_DARWIN_ENV)
96 attrs->va_fsid = avc->v->v_mount->mnt_stat.f_fsid.val[0];
97 #else /* ! AFS_DARWIN_ENV */
100 if (avc->mvstat == 2) {
101 tvp = afs_GetVolume(&avc->f.fid, 0, READ_LOCK);
102 /* The mount point's vnode. */
105 afs_calc_inum (tvp->mtpoint.Fid.Volume,
106 tvp->mtpoint.Fid.Vnode);
107 if (FidCmp(&afs_rootFid, &avc->f.fid) && !attrs->va_nodeid)
108 attrs->va_nodeid = 2;
109 afs_PutVolume(tvp, READ_LOCK);
111 attrs->va_nodeid = 2;
114 afs_calc_inum (avc->f.fid.Fid.Volume,
115 avc->f.fid.Fid.Vnode);
116 attrs->va_nodeid &= 0x7fffffff; /* Saber C hates negative inode #s! */
117 attrs->va_nlink = fakedir ? 100 : avc->f.m.LinkCount;
118 attrs->va_size = fakedir ? 4096 : avc->f.m.Length;
119 attrs->va_atime.tv_sec = attrs->va_mtime.tv_sec = attrs->va_ctime.tv_sec =
120 fakedir ? 0 : (int)avc->f.m.Date;
121 /* set microseconds to be dataversion # so that we approximate NFS-style
122 * use of mtime as a dataversion #. We take it mod 512K because
123 * microseconds *must* be less than a million, and 512K is the biggest
124 * power of 2 less than such. DataVersions are typically pretty small
125 * anyway, so the difference between 512K and 1000000 shouldn't matter
126 * much, and "&" is a lot faster than "%".
128 #if defined(AFS_DARWIN_ENV) || defined(AFS_FBSD_ENV)
129 /* nfs on these systems puts an 0 in nsec and stores the nfs usec (aka
130 * dataversion) in va_gen */
132 attrs->va_atime.tv_nsec = attrs->va_mtime.tv_nsec =
133 attrs->va_ctime.tv_nsec = 0;
134 attrs->va_gen = hgetlo(avc->f.m.DataVersion);
135 #elif defined(AFS_SGI_ENV) || defined(AFS_SUN5_ENV) || defined(AFS_AIX41_ENV) || defined(AFS_OBSD_ENV)
136 attrs->va_atime.tv_nsec = attrs->va_mtime.tv_nsec =
137 attrs->va_ctime.tv_nsec =
138 (hgetlo(avc->f.m.DataVersion) & 0x7ffff) * 1000;
140 attrs->va_atime.tv_usec = attrs->va_mtime.tv_usec =
141 attrs->va_ctime.tv_usec = (hgetlo(avc->f.m.DataVersion) & 0x7ffff);
143 #if defined(AFS_DARWIN_ENV) || defined(AFS_XBSD_ENV)
146 #if defined(AFS_SGI_ENV) || defined(AFS_SUN5_ENV)
147 attrs->va_blksize = AFS_BLKSIZE; /* XXX Was 8192 XXX */
149 attrs->va_blocksize = AFS_BLKSIZE; /* XXX Was 8192 XXX */
152 #if defined(AFS_HPUX110_ENV)
154 attrs->va_fstype = afs_globalVFS->vfs_mtype;
158 * Below return 0 (and not 1) blocks if the file is zero length. This conforms
159 * better with the other filesystems that do return 0.
161 #if defined(AFS_DARWIN_ENV) || defined(AFS_XBSD_ENV)
162 attrs->va_bytes = (attrs->va_size ? (attrs->va_size + 1023) : 1024);
164 attrs->va_bytes_rsv = -1;
166 #elif defined(AFS_HPUX_ENV)
167 attrs->va_blocks = (attrs->va_size ? ((attrs->va_size + 1023)>>10) : 0);
168 #elif defined(AFS_SGI_ENV)
169 attrs->va_blocks = BTOBB(attrs->va_size);
170 #elif defined(AFS_SUN5_ENV)
171 attrs->va_nblocks = (attrs->va_size ? ((attrs->va_size + 1023)>>10)<<1:0);
172 #else /* everything else */
173 attrs->va_blocks = (attrs->va_size ? ((attrs->va_size + 1023)>>10)<<1:0);
180 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
182 afs_getattr(OSI_VC_DECL(avc), struct vattr *attrs, int flags,
186 afs_getattr(OSI_VC_DECL(avc), struct vattr *attrs, afs_ucred_t *acred)
190 struct vrequest treq;
194 AFS_STATCNT(afs_getattr);
195 afs_Trace2(afs_iclSetp, CM_TRACE_GETATTR, ICL_TYPE_POINTER, avc,
196 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->f.m.Length));
198 if (afs_fakestat_enable && avc->mvstat == 1) {
199 struct afs_fakestat_state fakestat;
201 code = afs_InitReq(&treq, acred);
204 afs_InitFakeStat(&fakestat);
205 code = afs_TryEvalFakeStat(&avc, &fakestat, &treq);
207 afs_PutFakeStat(&fakestat);
211 code = afs_CopyOutAttrs(avc, attrs);
212 afs_PutFakeStat(&fakestat);
216 #if defined(AFS_SUN5_ENV) || defined(AFS_DARWIN_ENV) && !defined(AFS_DARWIN80_ENV)
217 #if defined(AFS_SUN5_ENV)
218 if (flags & ATTR_HINT)
220 if (avc->f.states & CUBCinit)
223 if (!(code = afs_InitReq(&treq, acred))) {
224 if (vType(avc) != VDIR && vType(avc) != VLNK &&
225 !afs_AccessOK(avc, PRSFS_READ, &treq, DONT_CHECK_MODE_BITS)) {
230 code = afs_CopyOutAttrs(avc, attrs);
238 #ifdef AFS_BOZONLOCK_ENV
239 afs_BozonLock(&avc->pvnLock, avc);
242 if (afs_shuttingdown)
245 code = afs_InitReq(&treq, acred);
247 if (code == 0 && !(avc->f.states & CStatd)) {
248 code = afs_VerifyVCache2(avc, &treq);
251 #ifdef AFS_BOZONLOCK_ENV
253 osi_FlushPages(avc, acred);
254 afs_BozonUnlock(&avc->pvnLock, avc);
257 if (code == 0 && vType(avc) != VDIR && vType(avc) != VLNK &&
258 !afs_AccessOK(avc, PRSFS_READ, &treq, DONT_CHECK_MODE_BITS)) {
264 osi_FlushText(avc); /* only needed to flush text if text locked last time */
265 code = afs_CopyOutAttrs(avc, attrs);
267 if (afs_nfsexporter) {
268 if (AFS_NFSXLATORREQ(acred)) {
269 if ((vType(avc) != VDIR)
270 && !afs_AccessOK(avc, PRSFS_READ, &treq,
272 CMB_ALLOW_EXEC_AS_READ)) {
276 if ((au = afs_FindUser(treq.uid, -1, READ_LOCK))) {
277 register struct afs_exporter *exporter = au->exporter;
279 if (exporter && !(afs_nfsexporter->exp_states & EXP_UNIXMODE)) {
282 * If the remote user wishes to enforce default Unix mode semantics,
283 * like in the nfs exporter case, we OR in the user bits
284 * into the group and other bits. We need to do this
285 * because there is no RFS_ACCESS call and thus nfs
286 * clients implement nfs_access by interpreting the
287 * mode bits in the traditional way, which of course
290 ubits = (attrs->va_mode & 0700) >> 6;
291 attrs->va_mode = attrs->va_mode | ubits | (ubits << 3);
292 /* If it's the root of AFS, replace the inode number with the
293 * inode number of the mounted on directory; otherwise this
294 * confuses getwd()... */
295 #ifdef AFS_LINUX22_ENV
296 if (avc == afs_globalVp) {
297 struct inode *ip = AFSTOV(avc)->i_sb->s_root->d_inode;
298 attrs->va_nodeid = ip->i_ino; /* VTOI()? */
302 #ifdef AFS_DARWIN_ENV
303 vnode_isvroot(AFSTOV(avc))
305 AFSTOV(avc)->v_flag & VROOT
308 struct vnode *vp = AFSTOV(avc);
310 #ifdef AFS_DARWIN80_ENV
311 /* XXX vp = vnode_mount(vp)->mnt_vnodecovered; */
314 vp = vp->v_vfsp->vfs_vnodecovered;
315 if (vp) { /* Ignore weird failures */
317 attrs->va_nodeid = VnodeToIno(vp);
321 ip = (struct inode *)VTOI(vp);
322 if (ip) /* Ignore weird failures */
323 attrs->va_nodeid = ip->i_number;
328 #endif /* AFS_LINUX22_ENV */
330 afs_PutUser(au, READ_LOCK);
339 code = afs_CheckCode(code, &treq, 14);
343 /* convert a Unix request into a status store request */
345 afs_VAttrToAS(register struct vcache *avc, register struct vattr *av,
346 register struct AFSStoreStatus *as)
350 AFS_STATCNT(afs_VAttrToAS);
351 #if defined(AFS_DARWIN80_ENV)
352 if (VATTR_IS_ACTIVE(av, va_mode)) {
353 #elif defined(AFS_AIX_ENV)
354 /* Boy, was this machine dependent bogosity hard to swallow????.... */
355 if (av->va_mode != -1) {
356 #elif defined(AFS_LINUX22_ENV) || defined(UKERNEL)
357 if (av->va_mask & ATTR_MODE) {
358 #elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
359 if (av->va_mask & AT_MODE) {
360 #elif defined(AFS_XBSD_ENV)
361 if (av->va_mode != (mode_t)VNOVAL) {
363 if (av->va_mode != ((unsigned short)-1)) {
366 as->UnixModeBits = av->va_mode & 0xffff;
367 if (avc->f.states & CForeign) {
368 ObtainWriteLock(&avc->lock, 127);
369 afs_FreeAllAxs(&(avc->Access));
370 ReleaseWriteLock(&avc->lock);
373 #if defined(AFS_DARWIN80_ENV)
374 if (VATTR_IS_ACTIVE(av, va_gid)) {
375 #elif defined(AFS_LINUX22_ENV) || defined(UKERNEL)
376 if (av->va_mask & ATTR_GID) {
377 #elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
378 if (av->va_mask & AT_GID) {
379 #elif defined(AFS_HPUX_ENV)
380 #if defined(AFS_HPUX102_ENV)
381 if (av->va_gid != GID_NO_CHANGE) {
383 if (av->va_gid != ((unsigned short)-1)) {
385 #elif defined(AFS_XBSD_ENV)
386 if (av->va_gid != (gid_t)VNOVAL) {
388 if (av->va_gid != -1) {
389 #endif /* AFS_LINUX22_ENV */
390 mask |= AFS_SETGROUP;
391 as->Group = av->va_gid;
393 #if defined(AFS_DARWIN80_ENV)
394 if (VATTR_IS_ACTIVE(av, va_uid)) {
395 #elif defined(AFS_LINUX22_ENV) || defined(UKERNEL)
396 if (av->va_mask & ATTR_UID) {
397 #elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
398 if (av->va_mask & AT_UID) {
399 #elif defined(AFS_HPUX_ENV)
400 #if defined(AFS_HPUX102_ENV)
401 if (av->va_uid != UID_NO_CHANGE) {
402 #elif defined(AFS_XBSD_ENV)
403 if (av->va_uid != (uid_t)VNOVAL) {
405 if (av->va_uid != ((unsigned short)-1)) {
408 if (av->va_uid != -1) {
409 #endif /* AFS_LINUX22_ENV */
410 mask |= AFS_SETOWNER;
411 as->Owner = av->va_uid;
413 #if defined(AFS_DARWIN80_ENV)
414 if (VATTR_IS_ACTIVE(av, va_modify_time)) {
415 #elif defined(AFS_LINUX22_ENV) || defined(UKERNEL)
416 if (av->va_mask & ATTR_MTIME) {
417 #elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
418 if (av->va_mask & AT_MTIME) {
420 if (av->va_mtime.tv_sec != -1) {
422 mask |= AFS_SETMODTIME;
424 #if defined(AFS_SUN5_ENV) || defined(AFS_AIX41_ENV) || defined(AFS_DARWIN_ENV) || defined(AFS_XBSD_ENV)
425 if (av->va_mtime.tv_nsec == -1)
427 if (av->va_mtime.tv_usec == -1)
429 as->ClientModTime = osi_Time(); /* special Sys V compat hack for Suns */
432 as->ClientModTime = av->va_mtime.tv_sec;
438 /* We don't set CDirty bit in avc->f.states because setattr calls WriteVCache
439 * synchronously, therefore, it's not needed.
441 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
443 afs_setattr(OSI_VC_DECL(avc), register struct vattr *attrs, int flags,
447 afs_setattr(OSI_VC_DECL(avc), register struct vattr *attrs,
451 struct vrequest treq;
452 struct AFSStoreStatus astat;
453 register afs_int32 code;
454 struct afs_fakestat_state fakestate;
457 AFS_STATCNT(afs_setattr);
458 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV) || defined(AFS_LINUX22_ENV)
459 afs_Trace4(afs_iclSetp, CM_TRACE_SETATTR, ICL_TYPE_POINTER, avc,
460 ICL_TYPE_INT32, attrs->va_mask, ICL_TYPE_OFFSET,
461 ICL_HANDLE_OFFSET(attrs->va_size), ICL_TYPE_OFFSET,
462 ICL_HANDLE_OFFSET(avc->f.m.Length));
464 afs_Trace4(afs_iclSetp, CM_TRACE_SETATTR, ICL_TYPE_POINTER, avc,
465 ICL_TYPE_INT32, attrs->va_mode, ICL_TYPE_OFFSET,
466 ICL_HANDLE_OFFSET(attrs->va_size), ICL_TYPE_OFFSET,
467 ICL_HANDLE_OFFSET(avc->f.m.Length));
469 if ((code = afs_InitReq(&treq, acred)))
474 afs_InitFakeStat(&fakestate);
475 code = afs_EvalFakeStat(&avc, &fakestate, &treq);
479 if (avc->f.states & CRO) {
483 #if defined(AFS_SGI_ENV)
484 /* ignore ATTR_LAZY calls - they are really only for keeping
485 * the access/mtime of mmaped files up to date
487 if (flags & ATTR_LAZY)
490 /* if file size has changed, we need write access, otherwise (e.g.
491 * chmod) give it a shot; if it fails, we'll discard the status
494 #if defined(AFS_DARWIN80_ENV)
495 if (VATTR_IS_ACTIVE(attrs, va_data_size)) {
496 #elif defined(AFS_LINUX22_ENV) || defined(UKERNEL)
497 if (attrs->va_mask & ATTR_SIZE) {
498 #elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
499 if (attrs->va_mask & AT_SIZE) {
500 #elif defined(AFS_XBSD_ENV)
501 if (attrs->va_size != VNOVAL) {
502 #elif defined(AFS_AIX41_ENV)
503 if (attrs->va_size != -1) {
505 if (attrs->va_size != ~0) {
507 if (!afs_AccessOK(avc, PRSFS_WRITE, &treq, DONT_CHECK_MODE_BITS)) {
513 if (AFS_IS_DISCONNECTED && !AFS_IS_DISCON_RW) {
518 afs_VAttrToAS(avc, attrs, &astat); /* interpret request */
520 #ifdef AFS_BOZONLOCK_ENV
521 afs_BozonLock(&avc->pvnLock, avc);
523 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
524 if (AFS_NFSXLATORREQ(acred)) {
525 avc->execsOrWriters++;
529 #if defined(AFS_SGI_ENV)
530 AFS_RWLOCK((vnode_t *) avc, VRWLOCK_WRITE);
532 #if defined(AFS_DARWIN80_ENV)
533 if (VATTR_IS_ACTIVE(attrs, va_data_size)) {
534 #elif defined(AFS_LINUX22_ENV) || defined(UKERNEL)
535 if (attrs->va_mask & ATTR_SIZE) {
536 #elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
537 if (attrs->va_mask & AT_SIZE) {
538 #elif defined(AFS_XBSD_ENV)
539 if (attrs->va_size != VNOVAL) {
540 #elif defined(AFS_AIX41_ENV)
541 if (attrs->va_size != -1) {
543 if (attrs->va_size != ~0) {
545 afs_size_t tsize = attrs->va_size;
546 ObtainWriteLock(&avc->lock, 128);
547 avc->f.states |= CDirty;
549 if (AFS_IS_DISCONNECTED && tsize >=avc->f.m.Length) {
550 /* If we're growing the file, and we're disconnected, we need
551 * to make the relevant dcache chunks appear ourselves. */
552 code = afs_ExtendSegments(avc, tsize, &treq);
554 code = afs_TruncateAllSegments(avc, tsize, &treq, acred);
556 #ifdef AFS_LINUX26_ENV
557 /* We must update the Linux kernel's idea of file size as soon as
558 * possible, to avoid racing with delayed writepages delivered by
561 i_size_write(AFSTOV(avc), tsize);
563 /* if date not explicitly set by this call, set it ourselves, since we
564 * changed the data */
565 if (!(astat.Mask & AFS_SETMODTIME)) {
566 astat.Mask |= AFS_SETMODTIME;
567 astat.ClientModTime = osi_Time();
571 if (((avc->execsOrWriters <= 0) && (avc->f.states & CCreating) == 0)
572 || (avc->execsOrWriters == 1 && AFS_NFSXLATORREQ(acred))) {
574 /* Store files now if not disconnected. */
575 /* XXX: AFS_IS_DISCON_RW handled. */
576 if (!AFS_IS_DISCONNECTED) {
577 code = afs_StoreAllSegments(avc, &treq, AFS_ASYNC);
579 avc->f.states &= ~CDirty;
583 avc->f.states &= ~CDirty;
585 ReleaseWriteLock(&avc->lock);
587 osi_FlushText(avc); /* do this after releasing all locks */
590 if (!AFS_IS_DISCONNECTED) {
592 ObtainSharedLock(&avc->lock, 16); /* lock entry */
593 code = afs_WriteVCache(avc, &astat, &treq); /* send request */
594 ReleaseSharedLock(&avc->lock); /* release lock */
597 ObtainWriteLock(&afs_xcbhash, 487);
598 afs_DequeueCallback(avc);
599 avc->f.states &= ~CStatd;
600 ReleaseWriteLock(&afs_xcbhash);
601 if (avc->f.fid.Fid.Vnode & 1 || (vType(avc) == VDIR))
602 osi_dnlc_purgedp(avc);
603 /* error? erase any changes we made to vcache entry */
606 #if defined(AFS_DISCON_ENV)
609 ObtainSharedLock(&avc->lock, 712);
610 /* Write changes locally. */
611 code = afs_WriteVCacheDiscon(avc, &astat, attrs);
612 ReleaseSharedLock(&avc->lock);
614 } /* if (!AFS_IS_DISCONNECTED) */
616 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
617 if (AFS_NFSXLATORREQ(acred)) {
618 avc->execsOrWriters--;
621 #ifdef AFS_BOZONLOCK_ENV
622 afs_BozonUnlock(&avc->pvnLock, avc);
624 #if defined(AFS_SGI_ENV)
625 AFS_RWUNLOCK((vnode_t *) avc, VRWLOCK_WRITE);
628 afs_PutFakeStat(&fakestate);
631 code = afs_CheckCode(code, &treq, 15);