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_SUN56_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.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 #if defined(AFS_FBSD_ENV) || defined(AFS_DFBSD_ENV)
122 vnode_pager_setsize(vp, (u_long) attrs->va_size);
124 attrs->va_atime.tv_sec = attrs->va_mtime.tv_sec = attrs->va_ctime.tv_sec =
125 fakedir ? 0 : (int)avc->f.m.Date;
126 /* set microseconds to be dataversion # so that we approximate NFS-style
127 * use of mtime as a dataversion #. We take it mod 512K because
128 * microseconds *must* be less than a million, and 512K is the biggest
129 * power of 2 less than such. DataVersions are typically pretty small
130 * anyway, so the difference between 512K and 1000000 shouldn't matter
131 * much, and "&" is a lot faster than "%".
133 #if defined(AFS_DARWIN_ENV) || defined(AFS_FBSD_ENV)
134 /* nfs on these systems puts an 0 in nsec and stores the nfs usec (aka
135 * dataversion) in va_gen */
137 attrs->va_atime.tv_nsec = attrs->va_mtime.tv_nsec =
138 attrs->va_ctime.tv_nsec = 0;
139 attrs->va_gen = hgetlo(avc->f.m.DataVersion);
140 #elif defined(AFS_SGI_ENV) || defined(AFS_SUN5_ENV) || defined(AFS_AIX41_ENV) || defined(AFS_OBSD_ENV) || defined(AFS_NBSD_ENV)
141 attrs->va_atime.tv_nsec = attrs->va_mtime.tv_nsec =
142 attrs->va_ctime.tv_nsec =
143 (hgetlo(avc->f.m.DataVersion) & 0x7ffff) * 1000;
145 attrs->va_atime.tv_usec = attrs->va_mtime.tv_usec =
146 attrs->va_ctime.tv_usec = (hgetlo(avc->f.m.DataVersion) & 0x7ffff);
148 #if defined(AFS_DARWIN_ENV) || defined(AFS_XBSD_ENV)
151 #if defined(AFS_SGI_ENV) || defined(AFS_SUN5_ENV)
152 attrs->va_blksize = AFS_BLKSIZE; /* XXX Was 8192 XXX */
154 attrs->va_blocksize = AFS_BLKSIZE; /* XXX Was 8192 XXX */
157 #if defined(AFS_HPUX110_ENV)
159 attrs->va_fstype = afs_globalVFS->vfs_mtype;
163 * Below return 0 (and not 1) blocks if the file is zero length. This conforms
164 * better with the other filesystems that do return 0.
166 #if defined(AFS_DARWIN_ENV) || defined(AFS_XBSD_ENV)
167 attrs->va_bytes = (attrs->va_size ? (attrs->va_size + 1023) : 1024);
169 attrs->va_bytes_rsv = -1;
171 #elif defined(AFS_HPUX_ENV)
172 attrs->va_blocks = (attrs->va_size ? ((attrs->va_size + 1023)>>10) : 0);
173 #elif defined(AFS_SGI_ENV)
174 attrs->va_blocks = BTOBB(attrs->va_size);
175 #elif defined(AFS_SUN5_ENV)
176 attrs->va_nblocks = (attrs->va_size ? ((attrs->va_size + 1023)>>10)<<1:0);
177 #else /* everything else */
178 attrs->va_blocks = (attrs->va_size ? ((attrs->va_size + 1023)>>10)<<1:0);
185 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
187 afs_getattr(OSI_VC_DECL(avc), struct vattr *attrs, int flags,
191 afs_getattr(OSI_VC_DECL(avc), struct vattr *attrs, afs_ucred_t *acred)
195 struct vrequest treq;
200 AFS_STATCNT(afs_getattr);
201 afs_Trace2(afs_iclSetp, CM_TRACE_GETATTR, ICL_TYPE_POINTER, avc,
202 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->f.m.Length));
204 if (afs_fakestat_enable && avc->mvstat == 1) {
205 struct afs_fakestat_state fakestat;
207 code = afs_InitReq(&treq, acred);
210 afs_InitFakeStat(&fakestat);
211 code = afs_TryEvalFakeStat(&avc, &fakestat, &treq);
213 afs_PutFakeStat(&fakestat);
217 code = afs_CopyOutAttrs(avc, attrs);
218 afs_PutFakeStat(&fakestat);
221 #if defined(AFS_SUN5_ENV)
222 if (flags & ATTR_HINT) {
223 code = afs_CopyOutAttrs(avc, attrs);
227 #if defined(AFS_DARWIN_ENV) && !defined(AFS_DARWIN80_ENV)
228 if (avc->f.states & CUBCinit) {
229 code = afs_CopyOutAttrs(avc, attrs);
236 #ifdef AFS_BOZONLOCK_ENV
237 afs_BozonLock(&avc->pvnLock, avc);
240 if (afs_shuttingdown)
243 if (!(avc->f.states & CStatd)) {
244 if (!(code = afs_InitReq(&treq, acred))) {
245 code = afs_VerifyVCache2(avc, &treq);
251 #ifdef AFS_BOZONLOCK_ENV
253 osi_FlushPages(avc, acred);
254 afs_BozonUnlock(&avc->pvnLock, avc);
259 osi_FlushText(avc); /* only needed to flush text if text locked last time */
260 code = afs_CopyOutAttrs(avc, attrs);
262 if (afs_nfsexporter) {
264 if ((code = afs_InitReq(&treq, acred)))
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 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(struct vcache *avc, struct vattr *av,
346 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), struct vattr *attrs, int flags,
447 afs_setattr(OSI_VC_DECL(avc), struct vattr *attrs,
451 struct vrequest treq;
452 struct AFSStoreStatus astat;
454 #if defined(AFS_FBSD_ENV) || defined(AFS_DFBSD_ENV)
455 struct vnode *vp = AFSTOV(avc);
457 struct afs_fakestat_state fakestate;
460 AFS_STATCNT(afs_setattr);
461 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV) || defined(AFS_LINUX22_ENV)
462 afs_Trace4(afs_iclSetp, CM_TRACE_SETATTR, ICL_TYPE_POINTER, avc,
463 ICL_TYPE_INT32, attrs->va_mask, ICL_TYPE_OFFSET,
464 ICL_HANDLE_OFFSET(attrs->va_size), ICL_TYPE_OFFSET,
465 ICL_HANDLE_OFFSET(avc->f.m.Length));
467 afs_Trace4(afs_iclSetp, CM_TRACE_SETATTR, ICL_TYPE_POINTER, avc,
468 ICL_TYPE_INT32, attrs->va_mode, ICL_TYPE_OFFSET,
469 ICL_HANDLE_OFFSET(attrs->va_size), ICL_TYPE_OFFSET,
470 ICL_HANDLE_OFFSET(avc->f.m.Length));
472 if ((code = afs_InitReq(&treq, acred)))
477 afs_InitFakeStat(&fakestate);
478 code = afs_EvalFakeStat(&avc, &fakestate, &treq);
482 if (avc->f.states & CRO) {
486 #if defined(AFS_SGI_ENV)
487 /* ignore ATTR_LAZY calls - they are really only for keeping
488 * the access/mtime of mmaped files up to date
490 if (flags & ATTR_LAZY)
493 /* if file size has changed, we need write access, otherwise (e.g.
494 * chmod) give it a shot; if it fails, we'll discard the status
497 #if defined(AFS_DARWIN80_ENV)
498 if (VATTR_IS_ACTIVE(attrs, va_data_size)) {
499 #elif defined(AFS_LINUX22_ENV) || defined(UKERNEL)
500 if (attrs->va_mask & ATTR_SIZE) {
501 #elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
502 if (attrs->va_mask & AT_SIZE) {
503 #elif defined(AFS_XBSD_ENV)
504 if (attrs->va_size != VNOVAL) {
505 #elif defined(AFS_AIX41_ENV)
506 if (attrs->va_size != -1) {
508 if (attrs->va_size != ~0) {
510 if (!afs_AccessOK(avc, PRSFS_WRITE, &treq, DONT_CHECK_MODE_BITS)) {
516 if (AFS_IS_DISCONNECTED && !AFS_IS_DISCON_RW) {
521 afs_VAttrToAS(avc, attrs, &astat); /* interpret request */
523 #ifdef AFS_BOZONLOCK_ENV
524 afs_BozonLock(&avc->pvnLock, avc);
526 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
527 if (AFS_NFSXLATORREQ(acred)) {
528 avc->execsOrWriters++;
532 #if defined(AFS_SGI_ENV)
533 AFS_RWLOCK((vnode_t *) avc, VRWLOCK_WRITE);
535 #if defined(AFS_DARWIN80_ENV)
536 if (VATTR_IS_ACTIVE(attrs, va_data_size)) {
537 #elif defined(AFS_LINUX22_ENV) || defined(UKERNEL)
538 if (attrs->va_mask & ATTR_SIZE) {
539 #elif defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
540 if (attrs->va_mask & AT_SIZE) {
541 #elif defined(AFS_XBSD_ENV)
542 if (attrs->va_size != VNOVAL) {
543 #elif defined(AFS_AIX41_ENV)
544 if (attrs->va_size != -1) {
546 if (attrs->va_size != ~0) {
548 afs_size_t tsize = attrs->va_size;
549 ObtainWriteLock(&avc->lock, 128);
550 avc->f.states |= CDirty;
552 if (AFS_IS_DISCONNECTED && tsize >=avc->f.m.Length) {
553 /* If we're growing the file, and we're disconnected, we need
554 * to make the relevant dcache chunks appear ourselves. */
555 code = afs_ExtendSegments(avc, tsize, &treq);
557 code = afs_TruncateAllSegments(avc, tsize, &treq, acred);
559 #ifdef AFS_LINUX26_ENV
560 /* We must update the Linux kernel's idea of file size as soon as
561 * possible, to avoid racing with delayed writepages delivered by
564 i_size_write(AFSTOV(avc), tsize);
566 #if defined(AFS_FBSD_ENV) || defined(AFS_DFBSD_ENV)
567 vnode_pager_setsize(vp, (u_long) tsize);
569 /* if date not explicitly set by this call, set it ourselves, since we
570 * changed the data */
571 if (!(astat.Mask & AFS_SETMODTIME)) {
572 astat.Mask |= AFS_SETMODTIME;
573 astat.ClientModTime = osi_Time();
577 if (((avc->execsOrWriters <= 0) && (avc->f.states & CCreating) == 0)
578 || (avc->execsOrWriters == 1 && AFS_NFSXLATORREQ(acred))) {
580 /* Store files now if not disconnected. */
581 /* XXX: AFS_IS_DISCON_RW handled. */
582 if (!AFS_IS_DISCONNECTED) {
583 code = afs_StoreAllSegments(avc, &treq, AFS_ASYNC);
585 avc->f.states &= ~CDirty;
589 avc->f.states &= ~CDirty;
591 ReleaseWriteLock(&avc->lock);
593 osi_FlushText(avc); /* do this after releasing all locks */
596 if (!AFS_IS_DISCONNECTED) {
598 ObtainSharedLock(&avc->lock, 16); /* lock entry */
599 code = afs_WriteVCache(avc, &astat, &treq); /* send request */
600 ReleaseSharedLock(&avc->lock); /* release lock */
603 ObtainWriteLock(&afs_xcbhash, 487);
604 afs_DequeueCallback(avc);
605 avc->f.states &= ~CStatd;
606 ReleaseWriteLock(&afs_xcbhash);
607 if (avc->f.fid.Fid.Vnode & 1 || (vType(avc) == VDIR))
608 osi_dnlc_purgedp(avc);
609 /* error? erase any changes we made to vcache entry */
612 ObtainSharedLock(&avc->lock, 712);
613 /* Write changes locally. */
614 code = afs_WriteVCacheDiscon(avc, &astat, attrs);
615 ReleaseSharedLock(&avc->lock);
616 } /* if (!AFS_IS_DISCONNECTED) */
618 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
619 if (AFS_NFSXLATORREQ(acred)) {
620 avc->execsOrWriters--;
623 #ifdef AFS_BOZONLOCK_ENV
624 afs_BozonUnlock(&avc->pvnLock, avc);
626 #if defined(AFS_SGI_ENV)
627 AFS_RWUNLOCK((vnode_t *) avc, VRWLOCK_WRITE);
630 afs_PutFakeStat(&fakestate);
633 code = afs_CheckCode(code, &treq, 15);