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;
195 AFS_STATCNT(afs_getattr);
196 afs_Trace2(afs_iclSetp, CM_TRACE_GETATTR, ICL_TYPE_POINTER, avc,
197 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->f.m.Length));
199 if (afs_fakestat_enable && avc->mvstat == 1) {
200 struct afs_fakestat_state fakestat;
202 code = afs_InitReq(&treq, acred);
205 afs_InitFakeStat(&fakestat);
206 code = afs_TryEvalFakeStat(&avc, &fakestat, &treq);
208 afs_PutFakeStat(&fakestat);
212 code = afs_CopyOutAttrs(avc, attrs);
213 afs_PutFakeStat(&fakestat);
216 #if defined(AFS_SUN5_ENV)
217 if (flags & ATTR_HINT) {
218 code = afs_CopyOutAttrs(avc, attrs);
222 #if defined(AFS_DARWIN_ENV) && !defined(AFS_DARWIN80_ENV)
223 if (avc->f.states & CUBCinit) {
224 code = afs_CopyOutAttrs(avc, attrs);
231 #ifdef AFS_BOZONLOCK_ENV
232 afs_BozonLock(&avc->pvnLock, avc);
235 if (afs_shuttingdown)
238 if (!(avc->f.states & CStatd)) {
239 if (!(code = afs_InitReq(&treq, acred))) {
240 code = afs_VerifyVCache2(avc, &treq);
246 #ifdef AFS_BOZONLOCK_ENV
248 osi_FlushPages(avc, acred);
249 afs_BozonUnlock(&avc->pvnLock, avc);
254 osi_FlushText(avc); /* only needed to flush text if text locked last time */
255 code = afs_CopyOutAttrs(avc, attrs);
257 if (afs_nfsexporter) {
259 if ((code = afs_InitReq(&treq, acred)))
263 if (AFS_NFSXLATORREQ(acred)) {
264 if ((vType(avc) != VDIR)
265 && !afs_AccessOK(avc, PRSFS_READ, &treq,
267 CMB_ALLOW_EXEC_AS_READ)) {
271 if ((au = afs_FindUser(treq.uid, -1, READ_LOCK))) {
272 register struct afs_exporter *exporter = au->exporter;
274 if (exporter && !(afs_nfsexporter->exp_states & EXP_UNIXMODE)) {
277 * If the remote user wishes to enforce default Unix mode semantics,
278 * like in the nfs exporter case, we OR in the user bits
279 * into the group and other bits. We need to do this
280 * because there is no RFS_ACCESS call and thus nfs
281 * clients implement nfs_access by interpreting the
282 * mode bits in the traditional way, which of course
285 ubits = (attrs->va_mode & 0700) >> 6;
286 attrs->va_mode = attrs->va_mode | ubits | (ubits << 3);
287 /* If it's the root of AFS, replace the inode number with the
288 * inode number of the mounted on directory; otherwise this
289 * confuses getwd()... */
290 #ifdef AFS_LINUX22_ENV
291 if (avc == afs_globalVp) {
292 struct inode *ip = AFSTOV(avc)->i_sb->s_root->d_inode;
293 attrs->va_nodeid = ip->i_ino; /* VTOI()? */
297 #ifdef AFS_DARWIN_ENV
298 vnode_isvroot(AFSTOV(avc))
300 AFSTOV(avc)->v_flag & VROOT
303 struct vnode *vp = AFSTOV(avc);
305 #ifdef AFS_DARWIN80_ENV
306 /* XXX vp = vnode_mount(vp)->mnt_vnodecovered; */
309 vp = vp->v_vfsp->vfs_vnodecovered;
310 if (vp) { /* Ignore weird failures */
312 attrs->va_nodeid = VnodeToIno(vp);
316 ip = (struct inode *)VTOI(vp);
317 if (ip) /* Ignore weird failures */
318 attrs->va_nodeid = ip->i_number;
323 #endif /* AFS_LINUX22_ENV */
325 afs_PutUser(au, READ_LOCK);
334 code = afs_CheckCode(code, &treq, 14);
338 /* convert a Unix request into a status store request */
340 afs_VAttrToAS(register struct vcache *avc, register struct vattr *av,
341 register struct AFSStoreStatus *as)
345 AFS_STATCNT(afs_VAttrToAS);
346 #if defined(AFS_DARWIN80_ENV)
347 if (VATTR_IS_ACTIVE(av, va_mode)) {
348 #elif defined(AFS_AIX_ENV)
349 /* Boy, was this machine dependent bogosity hard to swallow????.... */
350 if (av->va_mode != -1) {
351 #elif defined(AFS_LINUX22_ENV) || defined(UKERNEL)
352 if (av->va_mask & ATTR_MODE) {
353 #elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
354 if (av->va_mask & AT_MODE) {
355 #elif defined(AFS_XBSD_ENV)
356 if (av->va_mode != (mode_t)VNOVAL) {
358 if (av->va_mode != ((unsigned short)-1)) {
361 as->UnixModeBits = av->va_mode & 0xffff;
362 if (avc->f.states & CForeign) {
363 ObtainWriteLock(&avc->lock, 127);
364 afs_FreeAllAxs(&(avc->Access));
365 ReleaseWriteLock(&avc->lock);
368 #if defined(AFS_DARWIN80_ENV)
369 if (VATTR_IS_ACTIVE(av, va_gid)) {
370 #elif defined(AFS_LINUX22_ENV) || defined(UKERNEL)
371 if (av->va_mask & ATTR_GID) {
372 #elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
373 if (av->va_mask & AT_GID) {
374 #elif defined(AFS_HPUX_ENV)
375 #if defined(AFS_HPUX102_ENV)
376 if (av->va_gid != GID_NO_CHANGE) {
378 if (av->va_gid != ((unsigned short)-1)) {
380 #elif defined(AFS_XBSD_ENV)
381 if (av->va_gid != (gid_t)VNOVAL) {
383 if (av->va_gid != -1) {
384 #endif /* AFS_LINUX22_ENV */
385 mask |= AFS_SETGROUP;
386 as->Group = av->va_gid;
388 #if defined(AFS_DARWIN80_ENV)
389 if (VATTR_IS_ACTIVE(av, va_uid)) {
390 #elif defined(AFS_LINUX22_ENV) || defined(UKERNEL)
391 if (av->va_mask & ATTR_UID) {
392 #elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
393 if (av->va_mask & AT_UID) {
394 #elif defined(AFS_HPUX_ENV)
395 #if defined(AFS_HPUX102_ENV)
396 if (av->va_uid != UID_NO_CHANGE) {
397 #elif defined(AFS_XBSD_ENV)
398 if (av->va_uid != (uid_t)VNOVAL) {
400 if (av->va_uid != ((unsigned short)-1)) {
403 if (av->va_uid != -1) {
404 #endif /* AFS_LINUX22_ENV */
405 mask |= AFS_SETOWNER;
406 as->Owner = av->va_uid;
408 #if defined(AFS_DARWIN80_ENV)
409 if (VATTR_IS_ACTIVE(av, va_modify_time)) {
410 #elif defined(AFS_LINUX22_ENV) || defined(UKERNEL)
411 if (av->va_mask & ATTR_MTIME) {
412 #elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
413 if (av->va_mask & AT_MTIME) {
415 if (av->va_mtime.tv_sec != -1) {
417 mask |= AFS_SETMODTIME;
419 #if defined(AFS_SUN5_ENV) || defined(AFS_AIX41_ENV) || defined(AFS_DARWIN_ENV) || defined(AFS_XBSD_ENV)
420 if (av->va_mtime.tv_nsec == -1)
422 if (av->va_mtime.tv_usec == -1)
424 as->ClientModTime = osi_Time(); /* special Sys V compat hack for Suns */
427 as->ClientModTime = av->va_mtime.tv_sec;
433 /* We don't set CDirty bit in avc->f.states because setattr calls WriteVCache
434 * synchronously, therefore, it's not needed.
436 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
438 afs_setattr(OSI_VC_DECL(avc), register struct vattr *attrs, int flags,
442 afs_setattr(OSI_VC_DECL(avc), register struct vattr *attrs,
446 struct vrequest treq;
447 struct AFSStoreStatus astat;
448 register afs_int32 code;
449 struct afs_fakestat_state fakestate;
452 AFS_STATCNT(afs_setattr);
453 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV) || defined(AFS_LINUX22_ENV)
454 afs_Trace4(afs_iclSetp, CM_TRACE_SETATTR, ICL_TYPE_POINTER, avc,
455 ICL_TYPE_INT32, attrs->va_mask, ICL_TYPE_OFFSET,
456 ICL_HANDLE_OFFSET(attrs->va_size), ICL_TYPE_OFFSET,
457 ICL_HANDLE_OFFSET(avc->f.m.Length));
459 afs_Trace4(afs_iclSetp, CM_TRACE_SETATTR, ICL_TYPE_POINTER, avc,
460 ICL_TYPE_INT32, attrs->va_mode, ICL_TYPE_OFFSET,
461 ICL_HANDLE_OFFSET(attrs->va_size), ICL_TYPE_OFFSET,
462 ICL_HANDLE_OFFSET(avc->f.m.Length));
464 if ((code = afs_InitReq(&treq, acred)))
469 afs_InitFakeStat(&fakestate);
470 code = afs_EvalFakeStat(&avc, &fakestate, &treq);
474 if (avc->f.states & CRO) {
478 #if defined(AFS_SGI_ENV)
479 /* ignore ATTR_LAZY calls - they are really only for keeping
480 * the access/mtime of mmaped files up to date
482 if (flags & ATTR_LAZY)
485 /* if file size has changed, we need write access, otherwise (e.g.
486 * chmod) give it a shot; if it fails, we'll discard the status
489 #if defined(AFS_DARWIN80_ENV)
490 if (VATTR_IS_ACTIVE(attrs, va_data_size)) {
491 #elif defined(AFS_LINUX22_ENV) || defined(UKERNEL)
492 if (attrs->va_mask & ATTR_SIZE) {
493 #elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
494 if (attrs->va_mask & AT_SIZE) {
495 #elif defined(AFS_XBSD_ENV)
496 if (attrs->va_size != VNOVAL) {
497 #elif defined(AFS_AIX41_ENV)
498 if (attrs->va_size != -1) {
500 if (attrs->va_size != ~0) {
502 if (!afs_AccessOK(avc, PRSFS_WRITE, &treq, DONT_CHECK_MODE_BITS)) {
508 if (AFS_IS_DISCONNECTED && !AFS_IS_DISCON_RW) {
513 afs_VAttrToAS(avc, attrs, &astat); /* interpret request */
515 #ifdef AFS_BOZONLOCK_ENV
516 afs_BozonLock(&avc->pvnLock, avc);
518 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
519 if (AFS_NFSXLATORREQ(acred)) {
520 avc->execsOrWriters++;
524 #if defined(AFS_SGI_ENV)
525 AFS_RWLOCK((vnode_t *) avc, VRWLOCK_WRITE);
527 #if defined(AFS_DARWIN80_ENV)
528 if (VATTR_IS_ACTIVE(attrs, va_data_size)) {
529 #elif defined(AFS_LINUX22_ENV) || defined(UKERNEL)
530 if (attrs->va_mask & ATTR_SIZE) {
531 #elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
532 if (attrs->va_mask & AT_SIZE) {
533 #elif defined(AFS_XBSD_ENV)
534 if (attrs->va_size != VNOVAL) {
535 #elif defined(AFS_AIX41_ENV)
536 if (attrs->va_size != -1) {
538 if (attrs->va_size != ~0) {
540 afs_size_t tsize = attrs->va_size;
541 ObtainWriteLock(&avc->lock, 128);
542 avc->f.states |= CDirty;
544 if (AFS_IS_DISCONNECTED && tsize >=avc->f.m.Length) {
545 /* If we're growing the file, and we're disconnected, we need
546 * to make the relevant dcache chunks appear ourselves. */
547 code = afs_ExtendSegments(avc, tsize, &treq);
549 code = afs_TruncateAllSegments(avc, tsize, &treq, acred);
551 #ifdef AFS_LINUX26_ENV
552 /* We must update the Linux kernel's idea of file size as soon as
553 * possible, to avoid racing with delayed writepages delivered by
556 i_size_write(AFSTOV(avc), tsize);
558 /* if date not explicitly set by this call, set it ourselves, since we
559 * changed the data */
560 if (!(astat.Mask & AFS_SETMODTIME)) {
561 astat.Mask |= AFS_SETMODTIME;
562 astat.ClientModTime = osi_Time();
566 if (((avc->execsOrWriters <= 0) && (avc->f.states & CCreating) == 0)
567 || (avc->execsOrWriters == 1 && AFS_NFSXLATORREQ(acred))) {
569 /* Store files now if not disconnected. */
570 /* XXX: AFS_IS_DISCON_RW handled. */
571 if (!AFS_IS_DISCONNECTED) {
572 code = afs_StoreAllSegments(avc, &treq, AFS_ASYNC);
574 avc->f.states &= ~CDirty;
578 avc->f.states &= ~CDirty;
580 ReleaseWriteLock(&avc->lock);
582 osi_FlushText(avc); /* do this after releasing all locks */
585 if (!AFS_IS_DISCONNECTED) {
587 ObtainSharedLock(&avc->lock, 16); /* lock entry */
588 code = afs_WriteVCache(avc, &astat, &treq); /* send request */
589 ReleaseSharedLock(&avc->lock); /* release lock */
592 ObtainWriteLock(&afs_xcbhash, 487);
593 afs_DequeueCallback(avc);
594 avc->f.states &= ~CStatd;
595 ReleaseWriteLock(&afs_xcbhash);
596 if (avc->f.fid.Fid.Vnode & 1 || (vType(avc) == VDIR))
597 osi_dnlc_purgedp(avc);
598 /* error? erase any changes we made to vcache entry */
601 #if defined(AFS_DISCON_ENV)
604 ObtainSharedLock(&avc->lock, 712);
605 /* Write changes locally. */
606 code = afs_WriteVCacheDiscon(avc, &astat, attrs);
607 ReleaseSharedLock(&avc->lock);
609 } /* if (!AFS_IS_DISCONNECTED) */
611 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
612 if (AFS_NFSXLATORREQ(acred)) {
613 avc->execsOrWriters--;
616 #ifdef AFS_BOZONLOCK_ENV
617 afs_BozonUnlock(&avc->pvnLock, avc);
619 #if defined(AFS_SGI_ENV)
620 AFS_RWUNLOCK((vnode_t *) avc, VRWLOCK_WRITE);
623 afs_PutFakeStat(&fakestate);
626 code = afs_CheckCode(code, &treq, 15);