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;
43 /* copy out attributes from cache entry */
45 afs_CopyOutAttrs(register struct vcache *avc, register struct vattr *attrs)
47 register struct volume *tvp;
48 register struct cell *tcell;
51 AFS_STATCNT(afs_CopyOutAttrs);
52 if (afs_fakestat_enable && avc->mvstat == 1)
54 attrs->va_type = fakedir ? VDIR : vType(avc);
55 #if defined(AFS_SGI_ENV) || defined(AFS_AIX32_ENV) || defined(AFS_SUN5_ENV)
56 attrs->va_mode = fakedir ? 0755 : (mode_t) (avc->m.Mode & 0xffff);
58 attrs->va_mode = fakedir ? VDIR | 0755 : avc->m.Mode;
61 if (avc->m.Mode & (VSUID | VSGID)) {
62 /* setuid or setgid, make sure we're allowed to run them from this cell */
63 tcell = afs_GetCell(avc->fid.Cell, 0);
64 if (tcell && (tcell->states & CNoSUID))
65 attrs->va_mode &= ~(VSUID | VSGID);
67 #if defined(AFS_DARWIN_ENV)
69 extern u_int32_t afs_darwin_realmodes;
70 if (!afs_darwin_realmodes) {
71 /* Mac OS X uses the mode bits to determine whether a file or
72 * directory is accessible, and believes them, even though under
73 * AFS they're almost assuredly wrong, especially if the local uid
74 * does not match the AFS ID. So we set the mode bits
77 if (S_ISDIR(attrs->va_mode)) {
78 /* all access bits need to be set for directories, since even
79 * a mode 0 directory can still be used normally.
81 attrs->va_mode |= ACCESSPERMS;
83 /* for other files, replicate the user bits to group and other */
84 mode_t ubits = (attrs->va_mode & S_IRWXU) >> 6;
85 attrs->va_mode |= ubits | (ubits << 3);
89 #endif /* AFS_DARWIN_ENV */
90 attrs->va_uid = fakedir ? 0 : avc->m.Owner;
91 attrs->va_gid = fakedir ? 0 : avc->m.Group; /* yeah! */
92 #if defined(AFS_SUN56_ENV)
93 attrs->va_fsid = avc->v.v_vfsp->vfs_fsid.val[0];
94 #elif defined(AFS_OSF_ENV)
95 attrs->va_fsid = avc->v.v_mount->m_stat.f_fsid.val[0];
96 #elif defined(AFS_DARWIN70_ENV)
97 attrs->va_fsid = avc->v->v_mount->mnt_stat.f_fsid.val[0];
98 #else /* ! AFS_DARWIN70_ENV */
101 if (avc->mvstat == 2) {
102 tvp = afs_GetVolume(&avc->fid, 0, READ_LOCK);
103 /* The mount point's vnode. */
106 tvp->mtpoint.Fid.Vnode + (tvp->mtpoint.Fid.Volume << 16);
107 if (FidCmp(&afs_rootFid, &avc->fid) && !attrs->va_nodeid)
108 attrs->va_nodeid = 2;
109 afs_PutVolume(tvp, READ_LOCK);
111 attrs->va_nodeid = 2;
113 attrs->va_nodeid = avc->fid.Fid.Vnode + (avc->fid.Fid.Volume << 16);
114 attrs->va_nodeid &= 0x7fffffff; /* Saber C hates negative inode #s! */
115 attrs->va_nlink = fakedir ? 100 : avc->m.LinkCount;
116 attrs->va_size = fakedir ? 4096 : avc->m.Length;
117 attrs->va_atime.tv_sec = attrs->va_mtime.tv_sec = attrs->va_ctime.tv_sec =
118 fakedir ? 0 : (int)avc->m.Date;
119 /* set microseconds to be dataversion # so that we approximate NFS-style
120 * use of mtime as a dataversion #. We take it mod 512K because
121 * microseconds *must* be less than a million, and 512K is the biggest
122 * power of 2 less than such. DataVersions are typically pretty small
123 * anyway, so the difference between 512K and 1000000 shouldn't matter
124 * much, and "&" is a lot faster than "%".
126 #if defined(AFS_DARWIN_ENV) || defined(AFS_FBSD_ENV)
127 /* nfs on these systems puts an 0 in nsec and stores the nfs usec (aka
128 * dataversion) in va_gen */
130 attrs->va_atime.tv_nsec = attrs->va_mtime.tv_nsec =
131 attrs->va_ctime.tv_nsec = 0;
132 attrs->va_gen = hgetlo(avc->m.DataVersion);
133 #elif defined(AFS_SGI_ENV) || defined(AFS_SUN5_ENV) || defined(AFS_AIX41_ENV) || defined(AFS_OBSD_ENV)
134 attrs->va_atime.tv_nsec = attrs->va_mtime.tv_nsec =
135 attrs->va_ctime.tv_nsec =
136 (hgetlo(avc->m.DataVersion) & 0x7ffff) * 1000;
138 attrs->va_atime.tv_usec = attrs->va_mtime.tv_usec =
139 attrs->va_ctime.tv_usec = (hgetlo(avc->m.DataVersion) & 0x7ffff);
141 #if defined(AFS_DARWIN_ENV) || defined(AFS_XBSD_ENV) || defined(AFS_OSF_ENV)
144 #if defined(AFS_SGI_ENV) || defined(AFS_SUN5_ENV)
145 attrs->va_blksize = PAGESIZE; /* XXX Was 8192 XXX */
147 attrs->va_blocksize = PAGESIZE; /* XXX Was 8192 XXX */
150 #if defined(AFS_HPUX110_ENV)
152 attrs->va_fstype = afs_globalVFS->vfs_mtype;
156 * Below return 0 (and not 1) blocks if the file is zero length. This conforms
157 * better with the other filesystems that do return 0.
159 #if !defined(AFS_OSF_ENV) && !defined(AFS_DARWIN_ENV) && !defined(AFS_XBSD_ENV)
160 #if !defined(AFS_HPUX_ENV)
163 (attrs->va_size ? ((attrs->va_size + 1023) >> 10) << 1 : 0);
164 #elif defined(AFS_SGI_ENV)
165 attrs->va_blocks = BTOBB(attrs->va_size);
168 (attrs->va_size ? ((attrs->va_size + 1023) >> 10) << 1 : 0);
170 #else /* !defined(AFS_HPUX_ENV) */
171 attrs->va_blocks = (attrs->va_size ? ((attrs->va_size + 1023) >> 10) : 0);
172 #endif /* !defined(AFS_HPUX_ENV) */
173 #else /* ! AFS_OSF_ENV && !AFS_DARWIN_ENV && !AFS_XBSD_ENV */
174 attrs->va_bytes = (attrs->va_size ? (attrs->va_size + 1023) : 1024);
176 attrs->va_bytes_rsv = -1;
178 #endif /* ! AFS_OSF_ENV && !AFS_DARWIN_ENV && !AFS_XBSD_ENV */
180 #ifdef AFS_LINUX22_ENV
181 /* And linux has its own stash as well. */
182 vattr2inode(AFSTOV(avc), attrs);
189 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
191 afs_getattr(OSI_VC_DECL(avc), struct vattr *attrs, int flags,
192 struct AFS_UCRED *acred)
195 afs_getattr(OSI_VC_DECL(avc), struct vattr *attrs, struct AFS_UCRED *acred)
199 struct vrequest treq;
200 extern struct unixuser *afs_FindUser();
205 AFS_STATCNT(afs_getattr);
206 afs_Trace2(afs_iclSetp, CM_TRACE_GETATTR, ICL_TYPE_POINTER, avc,
207 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->m.Length));
209 if (afs_fakestat_enable && avc->mvstat == 1) {
210 struct afs_fakestat_state fakestat;
212 code = afs_InitReq(&treq, acred);
215 afs_InitFakeStat(&fakestat);
216 code = afs_TryEvalFakeStat(&avc, &fakestat, &treq);
218 afs_PutFakeStat(&fakestat);
222 code = afs_CopyOutAttrs(avc, attrs);
223 afs_PutFakeStat(&fakestat);
226 #if defined(AFS_SUN5_ENV)
227 if (flags & ATTR_HINT) {
228 code = afs_CopyOutAttrs(avc, attrs);
232 #if defined(AFS_DARWIN_ENV)
233 if (avc->states & CUBCinit) {
234 code = afs_CopyOutAttrs(avc, attrs);
239 #ifdef AFS_BOZONLOCK_ENV
240 afs_BozonLock(&avc->pvnLock, avc);
243 if (afs_shuttingdown)
246 if (!(avc->states & CStatd)) {
247 if (!(code = afs_InitReq(&treq, acred))) {
248 code = afs_VerifyVCache2(avc, &treq);
254 #ifdef AFS_BOZONLOCK_ENV
256 osi_FlushPages(avc, acred);
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 register 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 = avc->v.i_sb->s_root->d_inode;
301 attrs->va_nodeid = ip->i_ino;
304 if (AFSTOV(avc)->v_flag & VROOT) {
305 struct vnode *vp = AFSTOV(avc);
307 vp = vp->v_vfsp->vfs_vnodecovered;
308 if (vp) { /* Ignore weird failures */
310 attrs->va_nodeid = VnodeToIno(vp);
314 ip = (struct inode *)VTOI(vp);
315 if (ip) /* Ignore weird failures */
316 attrs->va_nodeid = ip->i_number;
320 #endif /* AFS_LINUX22_ENV */
322 afs_PutUser(au, READ_LOCK);
328 code = afs_CheckCode(code, &treq, 14);
332 /* convert a Unix request into a status store request */
334 afs_VAttrToAS(register struct vcache *avc, register struct vattr *av,
335 register struct AFSStoreStatus *as)
339 AFS_STATCNT(afs_VAttrToAS);
340 #if defined(AFS_AIX_ENV)
341 /* Boy, was this machine dependent bogosity hard to swallow????.... */
342 if (av->va_mode != -1) {
343 #elif defined(AFS_LINUX22_ENV)
344 if (av->va_mask & ATTR_MODE) {
345 #elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
346 if (av->va_mask & AT_MODE) {
347 #elif defined(AFS_XBSD_ENV)
348 if (av->va_mode != (mode_t)VNOVAL) {
350 if (av->va_mode != ((unsigned short)-1)) {
353 as->UnixModeBits = av->va_mode & 0xffff;
354 if (avc->states & CForeign) {
355 ObtainWriteLock(&avc->lock, 127);
356 afs_FreeAllAxs(&(avc->Access));
357 ReleaseWriteLock(&avc->lock);
360 #if defined(AFS_LINUX22_ENV)
361 if (av->va_mask & ATTR_GID) {
362 #elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
363 if (av->va_mask & AT_GID) {
364 #elif defined(AFS_HPUX_ENV)
365 #if defined(AFS_HPUX102_ENV)
366 if (av->va_gid != GID_NO_CHANGE) {
368 if (av->va_gid != ((unsigned short)-1)) {
370 #elif defined(AFS_XBSD_ENV)
371 if (av->va_gid != (gid_t)VNOVAL) {
373 if (av->va_gid != -1) {
374 #endif /* AFS_LINUX22_ENV */
375 mask |= AFS_SETGROUP;
376 as->Group = av->va_gid;
378 #if defined(AFS_LINUX22_ENV)
379 if (av->va_mask & ATTR_UID) {
380 #elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
381 if (av->va_mask & AT_UID) {
382 #elif defined(AFS_HPUX_ENV)
383 #if defined(AFS_HPUX102_ENV)
384 if (av->va_uid != UID_NO_CHANGE) {
385 #elif defined(AFS_XBSD_ENV)
386 if (av->va_uid != (uid_t)VNOVAL) {
388 if (av->va_uid != ((unsigned short)-1)) {
391 if (av->va_uid != -1) {
392 #endif /* AFS_LINUX22_ENV */
393 mask |= AFS_SETOWNER;
394 as->Owner = av->va_uid;
396 #if defined(AFS_LINUX22_ENV)
397 if (av->va_mask & ATTR_MTIME) {
398 #elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
399 if (av->va_mask & AT_MTIME) {
401 if (av->va_mtime.tv_sec != -1) {
403 mask |= AFS_SETMODTIME;
405 #if defined(AFS_SUN5_ENV) || defined(AFS_AIX41_ENV) || defined(AFS_DARWIN_ENV) || defined(AFS_XBSD_ENV)
406 if (av->va_mtime.tv_nsec == -1)
408 if (av->va_mtime.tv_usec == -1)
410 as->ClientModTime = osi_Time(); /* special Sys V compat hack for Suns */
413 as->ClientModTime = av->va_mtime.tv_sec;
419 /* We don't set CDirty bit in avc->states because setattr calls WriteVCache
420 * synchronously, therefore, it's not needed.
422 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
424 afs_setattr(OSI_VC_DECL(avc), register struct vattr *attrs, int flags,
425 struct AFS_UCRED *acred)
428 afs_setattr(OSI_VC_DECL(avc), register struct vattr *attrs,
429 struct AFS_UCRED *acred)
432 struct vrequest treq;
433 struct AFSStoreStatus astat;
434 register afs_int32 code;
435 struct afs_fakestat_state fakestate;
438 AFS_STATCNT(afs_setattr);
439 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV) || defined(AFS_LINUX22_ENV)
440 afs_Trace4(afs_iclSetp, CM_TRACE_SETATTR, ICL_TYPE_POINTER, avc,
441 ICL_TYPE_INT32, attrs->va_mask, ICL_TYPE_OFFSET,
442 ICL_HANDLE_OFFSET(attrs->va_size), ICL_TYPE_OFFSET,
443 ICL_HANDLE_OFFSET(avc->m.Length));
445 afs_Trace4(afs_iclSetp, CM_TRACE_SETATTR, ICL_TYPE_POINTER, avc,
446 ICL_TYPE_INT32, attrs->va_mode, ICL_TYPE_OFFSET,
447 ICL_HANDLE_OFFSET(attrs->va_size), ICL_TYPE_OFFSET,
448 ICL_HANDLE_OFFSET(avc->m.Length));
450 if ((code = afs_InitReq(&treq, acred)))
453 afs_InitFakeStat(&fakestate);
454 code = afs_EvalFakeStat(&avc, &fakestate, &treq);
458 if (avc->states & CRO) {
462 #if defined(AFS_SGI_ENV)
463 /* ignore ATTR_LAZY calls - they are really only for keeping
464 * the access/mtime of mmaped files up to date
466 if (flags & ATTR_LAZY)
469 /* if file size has changed, we need write access, otherwise (e.g.
470 * chmod) give it a shot; if it fails, we'll discard the status
473 #if defined(AFS_LINUX22_ENV)
474 if (attrs->va_mask & ATTR_SIZE) {
475 #elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
476 if (attrs->va_mask & AT_SIZE) {
477 #elif defined(AFS_OSF_ENV) || defined(AFS_XBSD_ENV)
478 if (attrs->va_size != VNOVAL) {
479 #elif defined(AFS_AIX41_ENV)
480 if (attrs->va_size != -1) {
482 if (attrs->va_size != ~0) {
484 if (!afs_AccessOK(avc, PRSFS_WRITE, &treq, DONT_CHECK_MODE_BITS)) {
490 afs_VAttrToAS(avc, attrs, &astat); /* interpret request */
492 #ifdef AFS_BOZONLOCK_ENV
493 afs_BozonLock(&avc->pvnLock, avc);
495 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
496 if (AFS_NFSXLATORREQ(acred)) {
497 avc->execsOrWriters++;
501 #if defined(AFS_SGI_ENV)
502 AFS_RWLOCK((vnode_t *) avc, VRWLOCK_WRITE);
504 #if defined(AFS_LINUX22_ENV)
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_OSF_ENV) || defined(AFS_XBSD_ENV)
509 if (attrs->va_size != VNOVAL) {
511 if (attrs->va_size != -1) {
513 afs_size_t tsize = attrs->va_size;
514 ObtainWriteLock(&avc->lock, 128);
515 avc->states |= CDirty;
516 code = afs_TruncateAllSegments(avc, tsize, &treq, acred);
517 /* if date not explicitly set by this call, set it ourselves, since we
518 * changed the data */
519 if (!(astat.Mask & AFS_SETMODTIME)) {
520 astat.Mask |= AFS_SETMODTIME;
521 astat.ClientModTime = osi_Time();
524 if (((avc->execsOrWriters <= 0) && (avc->states & CCreating) == 0)
525 || (avc->execsOrWriters == 1 && AFS_NFSXLATORREQ(acred))) {
526 code = afs_StoreAllSegments(avc, &treq, AFS_ASYNC);
528 avc->states &= ~CDirty;
531 avc->states &= ~CDirty;
533 ReleaseWriteLock(&avc->lock);
535 osi_FlushText(avc); /* do this after releasing all locks */
538 ObtainSharedLock(&avc->lock, 16); /* lock entry */
539 code = afs_WriteVCache(avc, &astat, &treq); /* send request */
540 ReleaseSharedLock(&avc->lock); /* release lock */
543 ObtainWriteLock(&afs_xcbhash, 487);
544 afs_DequeueCallback(avc);
545 avc->states &= ~CStatd;
546 ReleaseWriteLock(&afs_xcbhash);
547 if (avc->fid.Fid.Vnode & 1 || (vType(avc) == VDIR))
548 osi_dnlc_purgedp(avc);
549 /* error? erase any changes we made to vcache entry */
551 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
552 if (AFS_NFSXLATORREQ(acred)) {
553 avc->execsOrWriters--;
556 #ifdef AFS_BOZONLOCK_ENV
557 afs_BozonUnlock(&avc->pvnLock, avc);
559 #if defined(AFS_SGI_ENV)
560 AFS_RWUNLOCK((vnode_t *) avc, VRWLOCK_WRITE);
563 afs_PutFakeStat(&fakestate);
564 code = afs_CheckCode(code, &treq, 15);