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
11 * afs_vnop_attrs.c - setattr and getattr vnodeops
21 #include <afsconfig.h>
22 #include "../afs/param.h"
26 #include "../afs/sysincludes.h" /* Standard vendor system headers */
27 #include "../afs/afsincludes.h" /* Afs-based standard headers */
28 #include "../afs/afs_stats.h" /* statistics */
29 #include "../afs/afs_cbqueue.h"
30 #include "../afs/nfsclient.h"
31 #include "../afs/afs_osidnlc.h"
33 extern afs_rwlock_t afs_xcbhash;
34 struct afs_exporter *afs_nfsexporter;
35 extern struct vcache *afs_globalVp;
37 /* copy out attributes from cache entry */
38 int afs_CopyOutAttrs(register struct vcache *avc, register struct vattr *attrs)
40 register struct volume *tvp;
41 register struct cell *tcell;
45 AFS_STATCNT(afs_CopyOutAttrs);
46 if (afs_fakestat_enable && avc->mvstat == 1)
48 #if defined(AFS_MACH_ENV )
49 attrs->va_mode = fakedir ? VDIR | 0755 : vType(avc) | (avc->m.Mode&~VFMT);
50 #else /* AFS_MACH_ENV */
51 attrs->va_type = fakedir ? VDIR : vType(avc);
52 #if defined(AFS_SGI_ENV) || defined(AFS_AIX32_ENV) || defined(AFS_SUN5_ENV)
53 attrs->va_mode = fakedir ? 0755 : (mode_t)(avc->m.Mode & 0xffff);
55 attrs->va_mode = fakedir ? VDIR | 0755 : avc->m.Mode;
57 #endif /* AFS_MACH_ENV */
59 if (avc->m.Mode & (VSUID|VSGID)) {
60 /* setuid or setgid, make sure we're allowed to run them from this cell */
61 tcell = afs_GetCell(avc->fid.Cell, 0);
62 if (tcell && (tcell->states & CNoSUID))
63 attrs->va_mode &= ~(VSUID|VSGID);
65 attrs->va_uid = fakedir ? 0 : avc->m.Owner;
66 attrs->va_gid = fakedir ? 0 : avc->m.Group; /* yeah! */
67 #if defined(AFS_SUN56_ENV)
68 attrs->va_fsid = avc->v.v_vfsp->vfs_fsid.val[0];
71 /* XXX We try making this match the vfs's dev field XXX */
75 attrs->va_fsid = avc->v.v_mount->m_stat.f_fsid.val[0];
80 #endif /* AFS_SUN56_ENV */
81 if (avc->mvstat == 2) {
82 tvp = afs_GetVolume(&avc->fid, 0, READ_LOCK);
83 /* The mount point's vnode. */
86 tvp->mtpoint.Fid.Vnode + (tvp->mtpoint.Fid.Volume << 16);
87 if (FidCmp(&afs_rootFid, &avc->fid) && !attrs->va_nodeid)
89 afs_PutVolume(tvp, READ_LOCK);
91 else attrs->va_nodeid = 2;
93 else attrs->va_nodeid = avc->fid.Fid.Vnode + (avc->fid.Fid.Volume << 16);
94 attrs->va_nodeid &= 0x7fffffff; /* Saber C hates negative inode #s! */
95 attrs->va_nlink = fakedir ? 100 : avc->m.LinkCount;
96 attrs->va_size = fakedir ? 4096 : avc->m.Length;
97 attrs->va_atime.tv_sec = attrs->va_mtime.tv_sec = attrs->va_ctime.tv_sec =
98 fakedir ? 0 : (int)avc->m.Date;
99 /* set microseconds to be dataversion # so that we approximate NFS-style
100 * use of mtime as a dataversion #. We take it mod 512K because
101 * microseconds *must* be less than a million, and 512K is the biggest
102 * power of 2 less than such. DataVersions are typically pretty small
103 * anyway, so the difference between 512K and 1000000 shouldn't matter
104 * much, and "&" is a lot faster than "%".
106 #if defined(AFS_DARWIN_ENV) || defined(AFS_FBSD_ENV)
107 /* nfs on these systems puts an 0 in nsec and stores the nfs usec (aka
108 dataversion) in va_gen */
110 attrs->va_atime.tv_nsec = attrs->va_mtime.tv_nsec =
111 attrs->va_ctime.tv_nsec =0;
112 attrs->va_blocksize = PAGESIZE; /* XXX Was 8192 XXX */
113 attrs->va_gen = hgetlo(avc->m.DataVersion);
116 #if defined(AFS_SGI_ENV) || defined(AFS_SUN5_ENV) || defined(AFS_AIX41_ENV)
117 attrs->va_atime.tv_nsec = attrs->va_mtime.tv_nsec =
118 attrs->va_ctime.tv_nsec =
119 (hgetlo(avc->m.DataVersion) & 0x7ffff) * 1000;
120 #if defined(AFS_AIX41_ENV) || defined(AFS_DARWIN_ENV) || defined(AFS_FBSD_ENV)
121 attrs->va_blocksize = PAGESIZE; /* XXX Was 8192 XXX */
123 attrs->va_blksize = PAGESIZE; /* XXX Was 8192 XXX */
126 attrs->va_atime.tv_usec = attrs->va_mtime.tv_usec =
127 attrs->va_ctime.tv_usec =
128 (hgetlo(avc->m.DataVersion) & 0x7ffff);
129 attrs->va_blocksize = PAGESIZE; /* XXX Was 8192 XXX */
133 /* Have to use real device #s in Ultrix, since that's how FS type is
134 * encoded. If rdev doesn't match Ultrix equivalent of statfs's rdev, then
135 * "df ." doesn't work.
137 if (afs_globalVFS && afs_globalVFS->vfs_data)
138 attrs->va_rdev = ((struct mount *)(afs_globalVFS->vfs_data))->m_dev;
140 attrs->va_rdev = 1; /* better than nothing */
145 * Below return 0 (and not 1) blocks if the file is zero length. This conforms
146 * better with the other filesystems that do return 0.
148 #if defined(AFS_OSF_ENV)
150 attrs->va_size_rsv = 0;
153 /* attrs->va_gen = avc->m.DataVersion;*/
155 #endif /* AFS_OSF_ENV || AFS_DARWIN_ENV */
157 #if !defined(AFS_OSF_ENV) && !defined(AFS_DARWIN_ENV) && !defined(AFS_FBSD_ENV)
158 #if !defined(AFS_HPUX_ENV)
160 attrs->va_nblocks = (attrs->va_size? ((attrs->va_size + 1023)>>10) << 1 : 0);
162 #if defined(AFS_SGI_ENV)
163 attrs->va_blocks = BTOBB(attrs->va_size);
165 attrs->va_blocks = (attrs->va_size? ((attrs->va_size + 1023)>>10) << 1 : 0);
168 #else /* !defined(AFS_HPUX_ENV) */
169 attrs->va_blocks = (attrs->va_size? ((attrs->va_size + 1023)>>10) : 0);
170 #endif /* !defined(AFS_HPUX_ENV) */
171 #else /* ! AFS_OSF_ENV && !AFS_FBSD_ENV */
172 attrs->va_bytes = (attrs->va_size? (attrs->va_size + 1023) : 1024);
174 attrs->va_bytes_rsv = -1;
176 #endif /* ! AFS_OSF_ENV */
178 #ifdef AFS_LINUX22_ENV
179 /* And linux has it's own stash as well. */
180 vattr2inode(AFSTOV(avc), attrs);
187 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
188 int afs_getattr(OSI_VC_DECL(avc), struct vattr *attrs, int flags, struct AFS_UCRED *acred)
190 int afs_getattr(OSI_VC_DECL(avc), struct vattr *attrs, struct AFS_UCRED *acred)
194 struct vrequest treq;
195 extern struct unixuser *afs_FindUser();
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->m.Length));
204 if (afs_fakestat_enable && avc->mvstat == 1) {
205 struct afs_fakestat_state fakestat;
207 code = afs_InitReq(&treq, acred);
208 if (code) return code;
209 afs_InitFakeStat(&fakestat);
210 code = afs_TryEvalFakeStat(&avc, &fakestat, &treq);
212 afs_PutFakeStat(&fakestat);
216 code = afs_CopyOutAttrs(avc, attrs);
217 afs_PutFakeStat(&fakestat);
221 #if defined(AFS_SUN5_ENV)
222 if (flags & ATTR_HINT) {
223 code = afs_CopyOutAttrs(avc, attrs);
228 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV) || defined(AFS_SUN5_ENV)
229 afs_BozonLock(&avc->pvnLock, avc);
232 if (afs_shuttingdown) return EIO;
234 if (!(avc->states & CStatd)) {
235 if (!(code = afs_InitReq(&treq, acred))) {
236 code = afs_VerifyVCache2(avc, &treq);
242 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV) || defined(AFS_SUN5_ENV)
243 if (code == 0) osi_FlushPages(avc, acred);
244 afs_BozonUnlock(&avc->pvnLock, avc);
249 osi_FlushText(avc); /* only needed to flush text if text locked last time */
250 code = afs_CopyOutAttrs(avc, attrs);
252 if (afs_nfsexporter) {
254 if ((code = afs_InitReq(&treq, acred)))
258 if (AFS_NFSXLATORREQ(acred)) {
259 if ((vType(avc) != VDIR) &&
260 !afs_AccessOK(avc, PRSFS_READ, &treq,
261 CHECK_MODE_BITS|CMB_ALLOW_EXEC_AS_READ)) {
264 if (avc->mvstat == 2) {
265 #if defined(AFS_SGI_ENV) || defined(AFS_SUN5_ENV) || defined(AFS_AIX41_ENV) || defined(AFS_DARWIN_ENV) || defined(AFS_FBSD_ENV)
266 attrs->va_mtime.tv_nsec += ((++avc->xlatordv) * 1000);
268 attrs->va_mtime.tv_usec += ++avc->xlatordv;
272 if ((au = afs_FindUser(treq.uid, -1, READ_LOCK))) {
273 register struct afs_exporter *exporter = au->exporter;
275 if (exporter && !(afs_nfsexporter->exp_states & EXP_UNIXMODE)) {
278 * If the remote user wishes to enforce default Unix mode semantics,
279 * like in the nfs exporter case, we OR in the user bits
280 * into the group and other bits. We need to do this
281 * because there is no RFS_ACCESS call and thus nfs
282 * clients implement nfs_access by interpreting the
283 * mode bits in the traditional way, which of course
286 ubits = (attrs->va_mode & 0700) >> 6;
287 attrs->va_mode = attrs->va_mode | ubits | (ubits << 3);
288 /* If it's the root of AFS, replace the inode number with the
289 * inode number of the mounted on directory; otherwise this
290 * confuses getwd()... */
291 #ifdef AFS_LINUX22_ENV
292 if (avc == afs_globalVp) {
293 struct inode *ip = avc->v.i_sb->s_root->d_inode;
294 attrs->va_nodeid = ip->i_ino;
297 if (AFSTOV(avc)->v_flag & VROOT) {
298 struct vnode *vp = AFSTOV(avc);
300 vp = vp->v_vfsp->vfs_vnodecovered;
301 if (vp) { /* Ignore weird failures */
303 attrs->va_nodeid = VnodeToIno(vp);
307 ip = (struct inode *) VTOI(vp);
308 if (ip) /* Ignore weird failures */
309 attrs->va_nodeid = ip->i_number;
313 #endif /* AFS_LINUX22_ENV */
315 afs_PutUser(au, READ_LOCK);
321 code = afs_CheckCode(code, &treq, 14);
325 /* convert a Unix request into a status store request */
326 int afs_VAttrToAS(register struct vcache *avc, register struct vattr *av,
327 register struct AFSStoreStatus *as)
331 AFS_STATCNT(afs_VAttrToAS);
332 #if defined(AFS_AIX_ENV)
333 /* Boy, was this machine dependent bogosity hard to swallow????.... */
334 if (av->va_mode != -1) {
336 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV) || defined(AFS_LINUX22_ENV)
337 if (av->va_mask & AT_MODE) {
339 if (av->va_mode != ((unsigned short)-1)) {
343 as->UnixModeBits = av->va_mode & 0xffff;
344 if (avc->states & CForeign) {
345 ObtainWriteLock(&avc->lock,127);
346 afs_FreeAllAxs(&(avc->Access));
347 ReleaseWriteLock(&avc->lock);
351 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV) || defined(AFS_LINUX22_ENV)
352 if (av->va_mask & AT_GID) {
354 #if (defined(AFS_HPUX_ENV) || defined(AFS_SUN_ENV))
355 #if defined(AFS_HPUX102_ENV)
356 if (av->va_gid != GID_NO_CHANGE) {
358 if (av->va_gid != ((unsigned short)-1)) {
361 if (av->va_gid != -1) {
363 #endif /* AFS_SUN5_ENV */
364 mask |= AFS_SETGROUP;
365 as->Group = av->va_gid;
368 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV) || defined(AFS_LINUX22_ENV)
369 if (av->va_mask & AT_UID) {
371 #if (defined(AFS_HPUX_ENV) || defined(AFS_SUN_ENV))
372 #if defined(AFS_HPUX102_ENV)
373 if (av->va_uid != UID_NO_CHANGE) {
375 if (av->va_uid != ((unsigned short)-1)) {
378 if (av->va_uid != -1) {
380 #endif /* AFS_SUN5_ENV */
381 mask |= AFS_SETOWNER;
382 as->Owner = av->va_uid;
384 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV) || defined(AFS_LINUX22_ENV)
385 if (av->va_mask & AT_MTIME) {
387 if (av->va_mtime.tv_sec != -1) {
389 mask |= AFS_SETMODTIME;
391 #if defined(AFS_SUN5_ENV) || defined(AFS_AIX41_ENV) || defined(AFS_DARWIN_ENV) || defined(AFS_FBSD_ENV)
392 if (av->va_mtime.tv_nsec == -1)
394 if (av->va_mtime.tv_usec == -1)
396 as->ClientModTime = osi_Time(); /* special Sys V compat hack for Suns */
399 as->ClientModTime = av->va_mtime.tv_sec;
405 /* We don't set CDirty bit in avc->states because setattr calls WriteVCache
406 * synchronously, therefore, it's not needed.
408 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
409 int afs_setattr(OSI_VC_DECL(avc), register struct vattr *attrs, int flags, struct AFS_UCRED *acred)
411 int afs_setattr(OSI_VC_DECL(avc), register struct vattr *attrs, struct AFS_UCRED *acred)
414 struct vrequest treq;
415 struct AFSStoreStatus astat;
416 register afs_int32 code;
417 struct afs_fakestat_state fakestate;
420 AFS_STATCNT(afs_setattr);
421 afs_Trace2(afs_iclSetp, CM_TRACE_SETATTR, ICL_TYPE_POINTER, avc,
422 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->m.Length));
423 if ((code = afs_InitReq(&treq, acred))) return code;
425 afs_InitFakeStat(&fakestate);
426 code = afs_EvalFakeStat(&avc, &fakestate, &treq);
430 if (avc->states & CRO) {
434 #if defined(AFS_SGI_ENV)
435 /* ignore ATTR_LAZY calls - they are really only for keeping
436 * the access/mtime of mmaped files up to date
438 if (flags & ATTR_LAZY)
442 /* if file size has changed, we need write access, otherwise (e.g.
443 * chmod) give it a shot; if it fails, we'll discard the status
446 * Note that Ultrix actually defines ftruncate of a file you have open to
447 * be O.K., and does the proper access checks itself in the truncate
448 * path (unlike BSD or SUNOS), so we skip this check for Ultrix.
451 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV) || defined(AFS_LINUX22_ENV)
452 if (attrs->va_mask & AT_SIZE) {
455 if (attrs->va_size != VNOVAL) {
458 if (attrs->va_size != -1) {
460 if (attrs->va_size != ~0) {
464 if (!afs_AccessOK(avc, PRSFS_WRITE, &treq, DONT_CHECK_MODE_BITS)) {
471 afs_VAttrToAS(avc, attrs, &astat); /* interpret request */
473 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV) || defined(AFS_SUN5_ENV)
474 afs_BozonLock(&avc->pvnLock, avc);
476 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
477 if (AFS_NFSXLATORREQ(acred)) {
478 avc->execsOrWriters++;
482 #if defined(AFS_SGI_ENV)
483 AFS_RWLOCK((vnode_t *)avc, VRWLOCK_WRITE);
485 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV) || defined(AFS_LINUX22_ENV)
486 if (attrs->va_mask & AT_SIZE) {
488 #if defined(AFS_OSF_ENV)
489 if (attrs->va_size != VNOVAL) {
490 #else /* AFS_OSF_ENV */
491 if (attrs->va_size != -1) {
494 afs_size_t tsize = attrs->va_size;
495 ObtainWriteLock(&avc->lock,128);
496 avc->states |= CDirty;
497 code = afs_TruncateAllSegments(avc, tsize, &treq, acred);
498 /* if date not explicitly set by this call, set it ourselves, since we
499 * changed the data */
500 if (!(astat.Mask & AFS_SETMODTIME)) {
501 astat.Mask |= AFS_SETMODTIME;
502 astat.ClientModTime = osi_Time();
505 if ( ( (avc->execsOrWriters <= 0 ) && (avc->states & CCreating) == 0)
506 || ( avc->execsOrWriters == 1 && AFS_NFSXLATORREQ(acred)) ) {
507 code = afs_StoreAllSegments(avc, &treq, AFS_ASYNC);
509 avc->states &= ~CDirty;
512 avc->states &= ~CDirty;
514 ReleaseWriteLock(&avc->lock);
516 osi_FlushText(avc); /* do this after releasing all locks */
518 /* in case we changed the size here, propagate it to gp->g_size */
519 afs_gfshack((struct gnode *)avc);
523 ObtainSharedLock(&avc->lock,16); /* lock entry */
524 code = afs_WriteVCache(avc, &astat, &treq); /* send request */
525 ReleaseSharedLock(&avc->lock); /* release lock */
528 ObtainWriteLock(&afs_xcbhash, 487);
529 afs_DequeueCallback(avc);
530 avc->states &= ~CStatd;
531 ReleaseWriteLock(&afs_xcbhash);
532 if (avc->fid.Fid.Vnode & 1 || (vType(avc) == VDIR))
533 osi_dnlc_purgedp(avc);
534 /* error? erase any changes we made to vcache entry */
537 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
538 if (AFS_NFSXLATORREQ(acred)) {
539 avc->execsOrWriters--;
542 #if defined(AFS_SUN_ENV) || defined(AFS_OSF_ENV) || defined(AFS_SUN5_ENV)
543 afs_BozonUnlock(&avc->pvnLock, avc);
545 #if defined(AFS_SGI_ENV)
546 AFS_RWUNLOCK((vnode_t *)avc, VRWLOCK_WRITE);
549 afs_PutFakeStat(&fakestate);
550 code = afs_CheckCode(code, &treq, 15);