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(struct vcache *avc, struct vattr *attrs)
48 #if defined(AFS_FBSD_ENV) || defined(AFS_DFBSD_ENV)
49 struct vnode *vp = AFSTOV(avc);
53 AFS_STATCNT(afs_CopyOutAttrs);
54 if (afs_fakestat_enable && avc->mvstat == 1)
56 attrs->va_type = fakedir ? VDIR : vType(avc);
57 #if defined(AFS_SGI_ENV) || defined(AFS_AIX32_ENV) || defined(AFS_SUN5_ENV)
58 attrs->va_mode = fakedir ? 0755 : (mode_t) (avc->f.m.Mode & 0xffff);
60 attrs->va_mode = fakedir ? VDIR | 0755 : avc->f.m.Mode;
63 if (avc->f.m.Mode & (VSUID | VSGID)) {
64 /* setuid or setgid, make sure we're allowed to run them from this cell */
65 tcell = afs_GetCell(avc->f.fid.Cell, 0);
66 if (tcell && (tcell->states & CNoSUID))
67 attrs->va_mode &= ~(VSUID | VSGID);
69 #if defined(AFS_DARWIN_ENV)
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->f.m.Owner;
92 attrs->va_gid = fakedir ? 0 : avc->f.m.Group; /* yeah! */
93 #if defined(AFS_SUN5_ENV)
94 attrs->va_fsid = avc->v.v_vfsp->vfs_fsid.val[0];
95 #elif defined(AFS_DARWIN80_ENV)
96 VATTR_RETURN(attrs, va_fsid, vfs_statfs(vnode_mount(AFSTOV(avc)))->f_fsid.val[0]);
97 #elif defined(AFS_DARWIN_ENV)
98 attrs->va_fsid = avc->v->v_mount->mnt_stat.f_fsid.val[0];
99 #else /* ! AFS_DARWIN_ENV */
102 if (avc->mvstat == 2) {
103 tvp = afs_GetVolume(&avc->f.fid, 0, READ_LOCK);
104 /* The mount point's vnode. */
107 afs_calc_inum(tvp->mtpoint.Cell,
108 tvp->mtpoint.Fid.Volume,
109 tvp->mtpoint.Fid.Vnode);
110 if (FidCmp(&afs_rootFid, &avc->f.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->f.fid.Cell,
118 avc->f.fid.Fid.Volume,
119 avc->f.fid.Fid.Vnode);
120 attrs->va_nlink = fakedir ? 100 : avc->f.m.LinkCount;
121 attrs->va_size = fakedir ? 4096 : avc->f.m.Length;
122 #if defined(AFS_FBSD_ENV) || defined(AFS_DFBSD_ENV)
123 vnode_pager_setsize(vp, (u_long) attrs->va_size);
125 attrs->va_atime.tv_sec = attrs->va_mtime.tv_sec = attrs->va_ctime.tv_sec =
126 fakedir ? 0 : (int)avc->f.m.Date;
127 /* set microseconds to be dataversion # so that we approximate NFS-style
128 * use of mtime as a dataversion #. We take it mod 512K because
129 * microseconds *must* be less than a million, and 512K is the biggest
130 * power of 2 less than such. DataVersions are typically pretty small
131 * anyway, so the difference between 512K and 1000000 shouldn't matter
132 * much, and "&" is a lot faster than "%".
134 #if defined(AFS_DARWIN_ENV) || defined(AFS_FBSD_ENV)
135 /* nfs on these systems puts an 0 in nsec and stores the nfs usec (aka
136 * dataversion) in va_gen */
138 attrs->va_atime.tv_nsec = attrs->va_mtime.tv_nsec =
139 attrs->va_ctime.tv_nsec = 0;
140 attrs->va_gen = hgetlo(avc->f.m.DataVersion);
141 #elif defined(AFS_SGI_ENV) || defined(AFS_SUN5_ENV) || defined(AFS_AIX41_ENV) || defined(AFS_OBSD_ENV) || defined(AFS_NBSD_ENV)
142 attrs->va_atime.tv_nsec = attrs->va_mtime.tv_nsec =
143 attrs->va_ctime.tv_nsec =
144 (hgetlo(avc->f.m.DataVersion) & 0x7ffff) * 1000;
146 attrs->va_atime.tv_usec = attrs->va_mtime.tv_usec =
147 attrs->va_ctime.tv_usec = (hgetlo(avc->f.m.DataVersion) & 0x7ffff);
149 #if defined(AFS_DARWIN_ENV) || defined(AFS_XBSD_ENV)
152 #if defined(AFS_SGI_ENV) || defined(AFS_SUN5_ENV)
153 attrs->va_blksize = AFS_BLKSIZE; /* XXX Was 8192 XXX */
155 attrs->va_blocksize = AFS_BLKSIZE; /* XXX Was 8192 XXX */
158 #if defined(AFS_HPUX110_ENV)
160 attrs->va_fstype = afs_globalVFS->vfs_mtype;
164 * Below return 0 (and not 1) blocks if the file is zero length. This conforms
165 * better with the other filesystems that do return 0.
167 #if defined(AFS_DARWIN_ENV) || defined(AFS_XBSD_ENV)
168 attrs->va_bytes = (attrs->va_size ? (attrs->va_size + 1023) : 1024);
170 attrs->va_bytes_rsv = -1;
172 #elif defined(AFS_HPUX_ENV)
173 attrs->va_blocks = (attrs->va_size ? ((attrs->va_size + 1023)>>10) : 0);
174 #elif defined(AFS_SGI_ENV)
175 attrs->va_blocks = BTOBB(attrs->va_size);
176 #elif defined(AFS_SUN5_ENV)
177 attrs->va_nblocks = (attrs->va_size ? ((attrs->va_size + 1023)>>10)<<1:0);
178 #else /* everything else */
179 attrs->va_blocks = (attrs->va_size ? ((attrs->va_size + 1023)>>10)<<1:0);
186 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
188 afs_getattr(OSI_VC_DECL(avc), struct vattr *attrs, int flags,
192 afs_getattr(OSI_VC_DECL(avc), struct vattr *attrs, afs_ucred_t *acred)
196 struct vrequest treq;
201 AFS_STATCNT(afs_getattr);
202 afs_Trace2(afs_iclSetp, CM_TRACE_GETATTR, ICL_TYPE_POINTER, avc,
203 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->f.m.Length));
205 if (afs_fakestat_enable && avc->mvstat == 1) {
206 struct afs_fakestat_state fakestat;
208 code = afs_InitReq(&treq, acred);
211 afs_InitFakeStat(&fakestat);
212 code = afs_TryEvalFakeStat(&avc, &fakestat, &treq);
214 afs_PutFakeStat(&fakestat);
218 code = afs_CopyOutAttrs(avc, attrs);
219 afs_PutFakeStat(&fakestat);
222 #if defined(AFS_SUN5_ENV)
223 if (flags & ATTR_HINT) {
224 code = afs_CopyOutAttrs(avc, attrs);
228 #if defined(AFS_DARWIN_ENV) && !defined(AFS_DARWIN80_ENV)
229 if (avc->f.states & CUBCinit) {
230 code = afs_CopyOutAttrs(avc, attrs);
237 #ifdef AFS_BOZONLOCK_ENV
238 afs_BozonLock(&avc->pvnLock, avc);
241 if (afs_shuttingdown)
244 if (!(avc->f.states & CStatd)) {
245 if (!(code = afs_InitReq(&treq, acred))) {
246 code = afs_VerifyVCache2(avc, &treq);
252 #if defined(AFS_SUN5_ENV) || defined(AFS_BOZONLOCK_ENV)
254 osi_FlushPages(avc, acred);
256 #ifdef AFS_BOZONLOCK_ENV
257 afs_BozonUnlock(&avc->pvnLock, avc);
262 osi_FlushText(avc); /* only needed to flush text if text locked last time */
263 code = afs_CopyOutAttrs(avc, attrs);
265 if (afs_nfsexporter) {
267 if ((code = afs_InitReq(&treq, acred)))
271 if (AFS_NFSXLATORREQ(acred)) {
272 if ((vType(avc) != VDIR)
273 && !afs_AccessOK(avc, PRSFS_READ, &treq,
275 CMB_ALLOW_EXEC_AS_READ)) {
279 if ((au = afs_FindUser(treq.uid, -1, READ_LOCK))) {
280 struct afs_exporter *exporter = au->exporter;
282 if (exporter && !(afs_nfsexporter->exp_states & EXP_UNIXMODE)) {
285 * If the remote user wishes to enforce default Unix mode semantics,
286 * like in the nfs exporter case, we OR in the user bits
287 * into the group and other bits. We need to do this
288 * because there is no RFS_ACCESS call and thus nfs
289 * clients implement nfs_access by interpreting the
290 * mode bits in the traditional way, which of course
293 ubits = (attrs->va_mode & 0700) >> 6;
294 attrs->va_mode = attrs->va_mode | ubits | (ubits << 3);
295 /* If it's the root of AFS, replace the inode number with the
296 * inode number of the mounted on directory; otherwise this
297 * confuses getwd()... */
298 #ifdef AFS_LINUX22_ENV
299 if (avc == afs_globalVp) {
300 struct inode *ip = AFSTOV(avc)->i_sb->s_root->d_inode;
301 attrs->va_nodeid = ip->i_ino; /* VTOI()? */
305 #if defined(AFS_DARWIN_ENV)
306 vnode_isvroot(AFSTOV(avc))
307 #elif defined(AFS_NBSD50_ENV)
308 AFSTOV(avc)->v_vflag & VV_ROOT
310 AFSTOV(avc)->v_flag & VROOT
313 struct vnode *vp = AFSTOV(avc);
315 #ifdef AFS_DARWIN80_ENV
316 /* XXX vp = vnode_mount(vp)->mnt_vnodecovered; */
319 vp = vp->v_vfsp->vfs_vnodecovered;
320 if (vp) { /* Ignore weird failures */
322 attrs->va_nodeid = VnodeToIno(vp);
326 ip = (struct inode *)VTOI(vp);
327 if (ip) /* Ignore weird failures */
328 attrs->va_nodeid = ip->i_number;
333 #endif /* AFS_LINUX22_ENV */
335 afs_PutUser(au, READ_LOCK);
344 code = afs_CheckCode(code, &treq, 14);
348 /* convert a Unix request into a status store request */
350 afs_VAttrToAS(struct vcache *avc, struct vattr *av,
351 struct AFSStoreStatus *as)
355 AFS_STATCNT(afs_VAttrToAS);
356 #if defined(AFS_DARWIN80_ENV)
357 if (VATTR_IS_ACTIVE(av, va_mode)) {
358 #elif defined(AFS_AIX_ENV)
359 /* Boy, was this machine dependent bogosity hard to swallow????.... */
360 if (av->va_mode != -1) {
361 #elif defined(AFS_LINUX22_ENV) || defined(UKERNEL)
362 if (av->va_mask & ATTR_MODE) {
363 #elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
364 if (av->va_mask & AT_MODE) {
365 #elif defined(AFS_XBSD_ENV)
366 if (av->va_mode != (mode_t)VNOVAL) {
368 if (av->va_mode != ((unsigned short)-1)) {
371 as->UnixModeBits = av->va_mode & 0xffff;
372 if (avc->f.states & CForeign) {
373 ObtainWriteLock(&avc->lock, 127);
374 afs_FreeAllAxs(&(avc->Access));
375 ReleaseWriteLock(&avc->lock);
378 #if defined(AFS_DARWIN80_ENV)
379 if (VATTR_IS_ACTIVE(av, va_gid)) {
380 #elif defined(AFS_LINUX22_ENV) || defined(UKERNEL)
381 if (av->va_mask & ATTR_GID) {
382 #elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
383 if (av->va_mask & AT_GID) {
384 #elif defined(AFS_HPUX_ENV)
385 #if defined(AFS_HPUX102_ENV)
386 if (av->va_gid != GID_NO_CHANGE) {
388 if (av->va_gid != ((unsigned short)-1)) {
390 #elif defined(AFS_XBSD_ENV)
391 if (av->va_gid != (gid_t)VNOVAL) {
393 if (av->va_gid != -1) {
394 #endif /* AFS_LINUX22_ENV */
395 mask |= AFS_SETGROUP;
396 as->Group = av->va_gid;
398 #if defined(AFS_DARWIN80_ENV)
399 if (VATTR_IS_ACTIVE(av, va_uid)) {
400 #elif defined(AFS_LINUX22_ENV) || defined(UKERNEL)
401 if (av->va_mask & ATTR_UID) {
402 #elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
403 if (av->va_mask & AT_UID) {
404 #elif defined(AFS_HPUX_ENV)
405 #if defined(AFS_HPUX102_ENV)
406 if (av->va_uid != UID_NO_CHANGE) {
407 #elif defined(AFS_XBSD_ENV)
408 if (av->va_uid != (uid_t)VNOVAL) {
410 if (av->va_uid != ((unsigned short)-1)) {
413 if (av->va_uid != -1) {
414 #endif /* AFS_LINUX22_ENV */
415 mask |= AFS_SETOWNER;
416 as->Owner = av->va_uid;
418 #if defined(AFS_DARWIN80_ENV)
419 if (VATTR_IS_ACTIVE(av, va_modify_time)) {
420 #elif defined(AFS_LINUX22_ENV) || defined(UKERNEL)
421 if (av->va_mask & ATTR_MTIME) {
422 #elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
423 if (av->va_mask & AT_MTIME) {
425 if (av->va_mtime.tv_sec != -1) {
427 mask |= AFS_SETMODTIME;
429 #if defined(AFS_SUN5_ENV) || defined(AFS_AIX41_ENV) || defined(AFS_DARWIN_ENV) || defined(AFS_XBSD_ENV)
430 if (av->va_mtime.tv_nsec == -1)
432 if (av->va_mtime.tv_usec == -1)
434 as->ClientModTime = osi_Time(); /* special Sys V compat hack for Suns */
437 as->ClientModTime = av->va_mtime.tv_sec;
443 /* We don't set CDirty bit in avc->f.states because setattr calls WriteVCache
444 * synchronously, therefore, it's not needed.
446 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
448 afs_setattr(OSI_VC_DECL(avc), struct vattr *attrs, int flags,
452 afs_setattr(OSI_VC_DECL(avc), struct vattr *attrs,
456 struct vrequest treq;
457 struct AFSStoreStatus astat;
459 #if defined(AFS_FBSD_ENV) || defined(AFS_DFBSD_ENV)
460 struct vnode *vp = AFSTOV(avc);
462 struct afs_fakestat_state fakestate;
465 AFS_STATCNT(afs_setattr);
466 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV) || defined(AFS_LINUX22_ENV)
467 afs_Trace4(afs_iclSetp, CM_TRACE_SETATTR, ICL_TYPE_POINTER, avc,
468 ICL_TYPE_INT32, attrs->va_mask, ICL_TYPE_OFFSET,
469 ICL_HANDLE_OFFSET(attrs->va_size), ICL_TYPE_OFFSET,
470 ICL_HANDLE_OFFSET(avc->f.m.Length));
472 afs_Trace4(afs_iclSetp, CM_TRACE_SETATTR, ICL_TYPE_POINTER, avc,
473 ICL_TYPE_INT32, attrs->va_mode, ICL_TYPE_OFFSET,
474 ICL_HANDLE_OFFSET(attrs->va_size), ICL_TYPE_OFFSET,
475 ICL_HANDLE_OFFSET(avc->f.m.Length));
477 if ((code = afs_InitReq(&treq, acred)))
482 afs_InitFakeStat(&fakestate);
483 code = afs_EvalFakeStat(&avc, &fakestate, &treq);
487 if (avc->f.states & CRO) {
491 #if defined(AFS_SGI_ENV)
492 /* ignore ATTR_LAZY calls - they are really only for keeping
493 * the access/mtime of mmaped files up to date
495 if (flags & ATTR_LAZY)
498 /* if file size has changed, we need write access, otherwise (e.g.
499 * chmod) give it a shot; if it fails, we'll discard the status
502 #if defined(AFS_DARWIN80_ENV)
503 if (VATTR_IS_ACTIVE(attrs, va_data_size)) {
504 #elif defined(AFS_LINUX22_ENV) || defined(UKERNEL)
505 if (attrs->va_mask & ATTR_SIZE) {
506 #elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
507 if (attrs->va_mask & AT_SIZE) {
508 #elif defined(AFS_XBSD_ENV)
509 if (attrs->va_size != VNOVAL) {
510 #elif defined(AFS_AIX41_ENV)
511 if (attrs->va_size != -1) {
513 if (attrs->va_size != ~0) {
515 if (!afs_AccessOK(avc, PRSFS_WRITE, &treq, DONT_CHECK_MODE_BITS)) {
521 if (AFS_IS_DISCONNECTED && !AFS_IS_DISCON_RW) {
526 afs_VAttrToAS(avc, attrs, &astat); /* interpret request */
528 #ifdef AFS_BOZONLOCK_ENV
529 afs_BozonLock(&avc->pvnLock, avc);
531 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
532 if (AFS_NFSXLATORREQ(acred)) {
533 avc->execsOrWriters++;
537 #if defined(AFS_SGI_ENV)
538 AFS_RWLOCK((vnode_t *) avc, VRWLOCK_WRITE);
540 #if defined(AFS_DARWIN80_ENV)
541 if (VATTR_IS_ACTIVE(attrs, va_data_size)) {
542 #elif defined(AFS_LINUX22_ENV) || defined(UKERNEL)
543 if (attrs->va_mask & ATTR_SIZE) {
544 #elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
545 if (attrs->va_mask & AT_SIZE) {
546 #elif defined(AFS_XBSD_ENV)
547 if (attrs->va_size != VNOVAL) {
548 #elif defined(AFS_AIX41_ENV)
549 if (attrs->va_size != -1) {
551 if (attrs->va_size != ~0) {
553 afs_size_t tsize = attrs->va_size;
554 ObtainWriteLock(&avc->lock, 128);
555 avc->f.states |= CDirty;
557 if (AFS_IS_DISCONNECTED && tsize >=avc->f.m.Length) {
558 /* If we're growing the file, and we're disconnected, we need
559 * to make the relevant dcache chunks appear ourselves. */
560 code = afs_ExtendSegments(avc, tsize, &treq);
562 code = afs_TruncateAllSegments(avc, tsize, &treq, acred);
564 #ifdef AFS_LINUX26_ENV
565 /* We must update the Linux kernel's idea of file size as soon as
566 * possible, to avoid racing with delayed writepages delivered by
569 i_size_write(AFSTOV(avc), tsize);
571 #if defined(AFS_FBSD_ENV) || defined(AFS_DFBSD_ENV)
572 vnode_pager_setsize(vp, (u_long) tsize);
574 /* if date not explicitly set by this call, set it ourselves, since we
575 * changed the data */
576 if (!(astat.Mask & AFS_SETMODTIME)) {
577 astat.Mask |= AFS_SETMODTIME;
578 astat.ClientModTime = osi_Time();
582 if (((avc->execsOrWriters <= 0) && (avc->f.states & CCreating) == 0)
583 || (avc->execsOrWriters == 1 && AFS_NFSXLATORREQ(acred))) {
585 /* Store files now if not disconnected. */
586 /* XXX: AFS_IS_DISCON_RW handled. */
587 if (!AFS_IS_DISCONNECTED) {
588 code = afs_StoreAllSegments(avc, &treq, AFS_ASYNC);
590 avc->f.states &= ~CDirty;
594 avc->f.states &= ~CDirty;
596 ReleaseWriteLock(&avc->lock);
598 osi_FlushText(avc); /* do this after releasing all locks */
601 if (!AFS_IS_DISCONNECTED) {
603 ObtainSharedLock(&avc->lock, 16); /* lock entry */
604 code = afs_WriteVCache(avc, &astat, &treq); /* send request */
605 ReleaseSharedLock(&avc->lock); /* release lock */
608 ObtainWriteLock(&afs_xcbhash, 487);
609 afs_DequeueCallback(avc);
610 avc->f.states &= ~CStatd;
611 ReleaseWriteLock(&afs_xcbhash);
612 if (avc->f.fid.Fid.Vnode & 1 || (vType(avc) == VDIR))
613 osi_dnlc_purgedp(avc);
614 /* error? erase any changes we made to vcache entry */
617 ObtainSharedLock(&avc->lock, 712);
618 /* Write changes locally. */
619 code = afs_WriteVCacheDiscon(avc, &astat, attrs);
620 ReleaseSharedLock(&avc->lock);
621 } /* if (!AFS_IS_DISCONNECTED) */
623 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
624 if (AFS_NFSXLATORREQ(acred)) {
625 avc->execsOrWriters--;
628 #ifdef AFS_BOZONLOCK_ENV
629 afs_BozonUnlock(&avc->pvnLock, avc);
631 #if defined(AFS_SGI_ENV)
632 AFS_RWUNLOCK((vnode_t *) avc, VRWLOCK_WRITE);
635 afs_PutFakeStat(&fakestate);
638 code = afs_CheckCode(code, &treq, 15);