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_OSF_ENV)
94 attrs->va_fsid = avc->v.v_mount->m_stat.f_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_DARWIN70_ENV)
98 attrs->va_fsid = avc->v->v_mount->mnt_stat.f_fsid.val[0];
99 #else /* ! AFS_DARWIN70_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.Fid.Volume,
108 tvp->mtpoint.Fid.Vnode);
109 if (FidCmp(&afs_rootFid, &avc->f.fid) && !attrs->va_nodeid)
110 attrs->va_nodeid = 2;
111 afs_PutVolume(tvp, READ_LOCK);
113 attrs->va_nodeid = 2;
116 afs_calc_inum (avc->f.fid.Fid.Volume,
117 avc->f.fid.Fid.Vnode);
118 attrs->va_nodeid &= 0x7fffffff; /* Saber C hates negative inode #s! */
119 attrs->va_nlink = fakedir ? 100 : avc->f.m.LinkCount;
120 attrs->va_size = fakedir ? 4096 : avc->f.m.Length;
121 attrs->va_atime.tv_sec = attrs->va_mtime.tv_sec = attrs->va_ctime.tv_sec =
122 fakedir ? 0 : (int)avc->f.m.Date;
123 /* set microseconds to be dataversion # so that we approximate NFS-style
124 * use of mtime as a dataversion #. We take it mod 512K because
125 * microseconds *must* be less than a million, and 512K is the biggest
126 * power of 2 less than such. DataVersions are typically pretty small
127 * anyway, so the difference between 512K and 1000000 shouldn't matter
128 * much, and "&" is a lot faster than "%".
130 #if defined(AFS_DARWIN_ENV) || defined(AFS_FBSD_ENV)
131 /* nfs on these systems puts an 0 in nsec and stores the nfs usec (aka
132 * dataversion) in va_gen */
134 attrs->va_atime.tv_nsec = attrs->va_mtime.tv_nsec =
135 attrs->va_ctime.tv_nsec = 0;
136 attrs->va_gen = hgetlo(avc->f.m.DataVersion);
137 #elif defined(AFS_SGI_ENV) || defined(AFS_SUN5_ENV) || defined(AFS_AIX41_ENV) || defined(AFS_OBSD_ENV)
138 attrs->va_atime.tv_nsec = attrs->va_mtime.tv_nsec =
139 attrs->va_ctime.tv_nsec =
140 (hgetlo(avc->f.m.DataVersion) & 0x7ffff) * 1000;
142 attrs->va_atime.tv_usec = attrs->va_mtime.tv_usec =
143 attrs->va_ctime.tv_usec = (hgetlo(avc->f.m.DataVersion) & 0x7ffff);
145 #if defined(AFS_DARWIN_ENV) || defined(AFS_XBSD_ENV) || defined(AFS_OSF_ENV)
148 #if defined(AFS_SGI_ENV) || defined(AFS_SUN5_ENV)
149 attrs->va_blksize = AFS_BLKSIZE; /* XXX Was 8192 XXX */
151 attrs->va_blocksize = AFS_BLKSIZE; /* XXX Was 8192 XXX */
154 #if defined(AFS_HPUX110_ENV)
156 attrs->va_fstype = afs_globalVFS->vfs_mtype;
160 * Below return 0 (and not 1) blocks if the file is zero length. This conforms
161 * better with the other filesystems that do return 0.
163 #if defined(AFS_OSF_ENV) || defined(AFS_DARWIN_ENV) || defined(AFS_XBSD_ENV)
164 attrs->va_bytes = (attrs->va_size ? (attrs->va_size + 1023) : 1024);
166 attrs->va_bytes_rsv = -1;
168 #elif defined(AFS_HPUX_ENV)
169 attrs->va_blocks = (attrs->va_size ? ((attrs->va_size + 1023)>>10) : 0);
170 #elif defined(AFS_SGI_ENV)
171 attrs->va_blocks = BTOBB(attrs->va_size);
172 #elif defined(AFS_SUN5_ENV)
173 attrs->va_nblocks = (attrs->va_size ? ((attrs->va_size + 1023)>>10)<<1:0);
174 #else /* everything else */
175 attrs->va_blocks = (attrs->va_size ? ((attrs->va_size + 1023)>>10)<<1:0);
182 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
184 afs_getattr(OSI_VC_DECL(avc), struct vattr *attrs, int flags,
188 afs_getattr(OSI_VC_DECL(avc), struct vattr *attrs, AFS_UCRED *acred)
192 struct vrequest treq;
197 AFS_STATCNT(afs_getattr);
198 afs_Trace2(afs_iclSetp, CM_TRACE_GETATTR, ICL_TYPE_POINTER, avc,
199 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->f.m.Length));
201 if (afs_fakestat_enable && avc->mvstat == 1) {
202 struct afs_fakestat_state fakestat;
204 code = afs_InitReq(&treq, acred);
207 afs_InitFakeStat(&fakestat);
208 code = afs_TryEvalFakeStat(&avc, &fakestat, &treq);
210 afs_PutFakeStat(&fakestat);
214 code = afs_CopyOutAttrs(avc, attrs);
215 afs_PutFakeStat(&fakestat);
218 #if defined(AFS_SUN5_ENV)
219 if (flags & ATTR_HINT) {
220 code = afs_CopyOutAttrs(avc, attrs);
224 #if defined(AFS_DARWIN_ENV) && !defined(AFS_DARWIN80_ENV)
225 if (avc->f.states & CUBCinit) {
226 code = afs_CopyOutAttrs(avc, attrs);
233 #ifdef AFS_BOZONLOCK_ENV
234 afs_BozonLock(&avc->pvnLock, avc);
237 if (afs_shuttingdown)
240 if (!(avc->f.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);
336 code = afs_CheckCode(code, &treq, 14);
340 /* convert a Unix request into a status store request */
342 afs_VAttrToAS(register struct vcache *avc, register struct vattr *av,
343 register struct AFSStoreStatus *as)
347 AFS_STATCNT(afs_VAttrToAS);
348 #if defined(AFS_DARWIN80_ENV)
349 if (VATTR_IS_ACTIVE(av, va_mode)) {
350 #elif defined(AFS_AIX_ENV)
351 /* Boy, was this machine dependent bogosity hard to swallow????.... */
352 if (av->va_mode != -1) {
353 #elif defined(AFS_LINUX22_ENV) || defined(UKERNEL)
354 if (av->va_mask & ATTR_MODE) {
355 #elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
356 if (av->va_mask & AT_MODE) {
357 #elif defined(AFS_XBSD_ENV)
358 if (av->va_mode != (mode_t)VNOVAL) {
360 if (av->va_mode != ((unsigned short)-1)) {
363 as->UnixModeBits = av->va_mode & 0xffff;
364 if (avc->f.states & CForeign) {
365 ObtainWriteLock(&avc->lock, 127);
366 afs_FreeAllAxs(&(avc->Access));
367 ReleaseWriteLock(&avc->lock);
370 #if defined(AFS_DARWIN80_ENV)
371 if (VATTR_IS_ACTIVE(av, va_gid)) {
372 #elif defined(AFS_LINUX22_ENV) || defined(UKERNEL)
373 if (av->va_mask & ATTR_GID) {
374 #elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
375 if (av->va_mask & AT_GID) {
376 #elif defined(AFS_HPUX_ENV)
377 #if defined(AFS_HPUX102_ENV)
378 if (av->va_gid != GID_NO_CHANGE) {
380 if (av->va_gid != ((unsigned short)-1)) {
382 #elif defined(AFS_XBSD_ENV)
383 if (av->va_gid != (gid_t)VNOVAL) {
385 if (av->va_gid != -1) {
386 #endif /* AFS_LINUX22_ENV */
387 mask |= AFS_SETGROUP;
388 as->Group = av->va_gid;
390 #if defined(AFS_DARWIN80_ENV)
391 if (VATTR_IS_ACTIVE(av, va_uid)) {
392 #elif defined(AFS_LINUX22_ENV) || defined(UKERNEL)
393 if (av->va_mask & ATTR_UID) {
394 #elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
395 if (av->va_mask & AT_UID) {
396 #elif defined(AFS_HPUX_ENV)
397 #if defined(AFS_HPUX102_ENV)
398 if (av->va_uid != UID_NO_CHANGE) {
399 #elif defined(AFS_XBSD_ENV)
400 if (av->va_uid != (uid_t)VNOVAL) {
402 if (av->va_uid != ((unsigned short)-1)) {
405 if (av->va_uid != -1) {
406 #endif /* AFS_LINUX22_ENV */
407 mask |= AFS_SETOWNER;
408 as->Owner = av->va_uid;
410 #if defined(AFS_DARWIN80_ENV)
411 if (VATTR_IS_ACTIVE(av, va_modify_time)) {
412 #elif defined(AFS_LINUX22_ENV) || defined(UKERNEL)
413 if (av->va_mask & ATTR_MTIME) {
414 #elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
415 if (av->va_mask & AT_MTIME) {
417 if (av->va_mtime.tv_sec != -1) {
419 mask |= AFS_SETMODTIME;
421 #if defined(AFS_SUN5_ENV) || defined(AFS_AIX41_ENV) || defined(AFS_DARWIN_ENV) || defined(AFS_XBSD_ENV)
422 if (av->va_mtime.tv_nsec == -1)
424 if (av->va_mtime.tv_usec == -1)
426 as->ClientModTime = osi_Time(); /* special Sys V compat hack for Suns */
429 as->ClientModTime = av->va_mtime.tv_sec;
435 /* We don't set CDirty bit in avc->f.states because setattr calls WriteVCache
436 * synchronously, therefore, it's not needed.
438 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
440 afs_setattr(OSI_VC_DECL(avc), register struct vattr *attrs, int flags,
444 afs_setattr(OSI_VC_DECL(avc), register struct vattr *attrs,
448 struct vrequest treq;
449 struct AFSStoreStatus astat;
450 register afs_int32 code;
451 struct afs_fakestat_state fakestate;
454 AFS_STATCNT(afs_setattr);
455 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV) || defined(AFS_LINUX22_ENV)
456 afs_Trace4(afs_iclSetp, CM_TRACE_SETATTR, ICL_TYPE_POINTER, avc,
457 ICL_TYPE_INT32, attrs->va_mask, ICL_TYPE_OFFSET,
458 ICL_HANDLE_OFFSET(attrs->va_size), ICL_TYPE_OFFSET,
459 ICL_HANDLE_OFFSET(avc->f.m.Length));
461 afs_Trace4(afs_iclSetp, CM_TRACE_SETATTR, ICL_TYPE_POINTER, avc,
462 ICL_TYPE_INT32, attrs->va_mode, ICL_TYPE_OFFSET,
463 ICL_HANDLE_OFFSET(attrs->va_size), ICL_TYPE_OFFSET,
464 ICL_HANDLE_OFFSET(avc->f.m.Length));
466 if ((code = afs_InitReq(&treq, acred)))
471 afs_InitFakeStat(&fakestate);
472 code = afs_EvalFakeStat(&avc, &fakestate, &treq);
476 if (avc->f.states & CRO) {
480 #if defined(AFS_SGI_ENV)
481 /* ignore ATTR_LAZY calls - they are really only for keeping
482 * the access/mtime of mmaped files up to date
484 if (flags & ATTR_LAZY)
487 /* if file size has changed, we need write access, otherwise (e.g.
488 * chmod) give it a shot; if it fails, we'll discard the status
491 #if defined(AFS_DARWIN80_ENV)
492 if (VATTR_IS_ACTIVE(attrs, va_data_size)) {
493 #elif defined(AFS_LINUX22_ENV) || defined(UKERNEL)
494 if (attrs->va_mask & ATTR_SIZE) {
495 #elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
496 if (attrs->va_mask & AT_SIZE) {
497 #elif defined(AFS_OSF_ENV) || defined(AFS_XBSD_ENV)
498 if (attrs->va_size != VNOVAL) {
499 #elif defined(AFS_AIX41_ENV)
500 if (attrs->va_size != -1) {
502 if (attrs->va_size != ~0) {
504 if (!afs_AccessOK(avc, PRSFS_WRITE, &treq, DONT_CHECK_MODE_BITS)) {
510 if (AFS_IS_DISCONNECTED && !AFS_IS_DISCON_RW) {
515 afs_VAttrToAS(avc, attrs, &astat); /* interpret request */
517 #ifdef AFS_BOZONLOCK_ENV
518 afs_BozonLock(&avc->pvnLock, avc);
520 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
521 if (AFS_NFSXLATORREQ(acred)) {
522 avc->execsOrWriters++;
526 #if defined(AFS_SGI_ENV)
527 AFS_RWLOCK((vnode_t *) avc, VRWLOCK_WRITE);
529 #if defined(AFS_DARWIN80_ENV)
530 if (VATTR_IS_ACTIVE(attrs, va_data_size)) {
531 #elif defined(AFS_LINUX22_ENV) || defined(UKERNEL)
532 if (attrs->va_mask & ATTR_SIZE) {
533 #elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
534 if (attrs->va_mask & AT_SIZE) {
535 #elif defined(AFS_OSF_ENV) || defined(AFS_XBSD_ENV)
536 if (attrs->va_size != VNOVAL) {
537 #elif defined(AFS_AIX41_ENV)
538 if (attrs->va_size != -1) {
540 if (attrs->va_size != ~0) {
542 afs_size_t tsize = attrs->va_size;
543 ObtainWriteLock(&avc->lock, 128);
544 avc->f.states |= CDirty;
546 if (AFS_IS_DISCONNECTED && tsize >=avc->f.m.Length) {
547 /* If we're growing the file, and we're disconnected, we need
548 * to make the relevant dcache chunks appear ourselves. */
549 code = afs_ExtendSegments(avc, tsize, &treq);
551 code = afs_TruncateAllSegments(avc, tsize, &treq, acred);
553 #ifdef AFS_LINUX26_ENV
554 /* We must update the Linux kernel's idea of file size as soon as
555 * possible, to avoid racing with delayed writepages delivered by
558 i_size_write(AFSTOV(avc), tsize);
560 /* if date not explicitly set by this call, set it ourselves, since we
561 * changed the data */
562 if (!(astat.Mask & AFS_SETMODTIME)) {
563 astat.Mask |= AFS_SETMODTIME;
564 astat.ClientModTime = osi_Time();
568 if (((avc->execsOrWriters <= 0) && (avc->f.states & CCreating) == 0)
569 || (avc->execsOrWriters == 1 && AFS_NFSXLATORREQ(acred))) {
571 /* Store files now if not disconnected. */
572 /* XXX: AFS_IS_DISCON_RW handled. */
573 if (!AFS_IS_DISCONNECTED) {
574 code = afs_StoreAllSegments(avc, &treq, AFS_ASYNC);
576 avc->f.states &= ~CDirty;
580 avc->f.states &= ~CDirty;
582 ReleaseWriteLock(&avc->lock);
584 osi_FlushText(avc); /* do this after releasing all locks */
587 if (!AFS_IS_DISCONNECTED) {
589 ObtainSharedLock(&avc->lock, 16); /* lock entry */
590 code = afs_WriteVCache(avc, &astat, &treq); /* send request */
591 ReleaseSharedLock(&avc->lock); /* release lock */
594 ObtainWriteLock(&afs_xcbhash, 487);
595 afs_DequeueCallback(avc);
596 avc->f.states &= ~CStatd;
597 ReleaseWriteLock(&afs_xcbhash);
598 if (avc->f.fid.Fid.Vnode & 1 || (vType(avc) == VDIR))
599 osi_dnlc_purgedp(avc);
600 /* error? erase any changes we made to vcache entry */
603 #if defined(AFS_DISCON_ENV)
606 ObtainSharedLock(&avc->lock, 712);
607 /* Write changes locally. */
608 code = afs_WriteVCacheDiscon(avc, &astat, attrs);
609 ReleaseSharedLock(&avc->lock);
611 } /* if (!AFS_IS_DISCONNECTED) */
613 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
614 if (AFS_NFSXLATORREQ(acred)) {
615 avc->execsOrWriters--;
618 #ifdef AFS_BOZONLOCK_ENV
619 afs_BozonUnlock(&avc->pvnLock, avc);
621 #if defined(AFS_SGI_ENV)
622 AFS_RWUNLOCK((vnode_t *) avc, VRWLOCK_WRITE);
625 afs_PutFakeStat(&fakestate);
628 code = afs_CheckCode(code, &treq, 15);