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 "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;
36 #if defined(AFS_HPUX110_ENV)
37 extern struct vfs *afs_globalVFS;
40 /* copy out attributes from cache entry */
41 int afs_CopyOutAttrs(register struct vcache *avc, register struct vattr *attrs)
43 register struct volume *tvp;
44 register struct cell *tcell;
47 AFS_STATCNT(afs_CopyOutAttrs);
48 if (afs_fakestat_enable && avc->mvstat == 1)
50 #if defined(AFS_MACH_ENV )
51 attrs->va_mode = fakedir ? VDIR | 0755 : vType(avc) | (avc->m.Mode&~VFMT);
52 #else /* AFS_MACH_ENV */
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->m.Mode & 0xffff);
57 attrs->va_mode = fakedir ? VDIR | 0755 : avc->m.Mode;
59 #endif /* AFS_MACH_ENV */
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)
68 /* Mac OS X uses the mode bits to determine whether a file or directory
69 * is accessible, and believes them, even though under AFS they're almost
70 * assuredly wrong, especially if the local uid does not match the AFS
71 * ID. So we set the mode bits conservatively.
73 if (S_ISDIR(attrs->va_mode)) {
74 /* all access bits need to be set for directories, since even
75 * a mode 0 directory can still be used normally.
77 attrs->va_mode |= ACCESSPERMS;
79 /* for other files, replicate the user bits to group and other */
80 mode_t ubits = (attrs->va_mode & S_IRWXU) >> 6;
81 attrs->va_mode |= ubits | (ubits << 3);
83 #endif /* AFS_DARWIN_ENV */
84 attrs->va_uid = fakedir ? 0 : avc->m.Owner;
85 attrs->va_gid = fakedir ? 0 : avc->m.Group; /* yeah! */
86 #if defined(AFS_SUN56_ENV)
87 attrs->va_fsid = avc->v.v_vfsp->vfs_fsid.val[0];
90 /* XXX We try making this match the vfs's dev field XXX */
94 attrs->va_fsid = avc->v.v_mount->m_stat.f_fsid.val[0];
99 #endif /* AFS_SUN56_ENV */
100 if (avc->mvstat == 2) {
101 tvp = afs_GetVolume(&avc->fid, 0, READ_LOCK);
102 /* The mount point's vnode. */
105 tvp->mtpoint.Fid.Vnode + (tvp->mtpoint.Fid.Volume << 16);
106 if (FidCmp(&afs_rootFid, &avc->fid) && !attrs->va_nodeid)
107 attrs->va_nodeid = 2;
108 afs_PutVolume(tvp, READ_LOCK);
110 else attrs->va_nodeid = 2;
112 else attrs->va_nodeid = avc->fid.Fid.Vnode + (avc->fid.Fid.Volume << 16);
113 attrs->va_nodeid &= 0x7fffffff; /* Saber C hates negative inode #s! */
114 attrs->va_nlink = fakedir ? 100 : avc->m.LinkCount;
115 attrs->va_size = fakedir ? 4096 : avc->m.Length;
116 attrs->va_atime.tv_sec = attrs->va_mtime.tv_sec = attrs->va_ctime.tv_sec =
117 fakedir ? 0 : (int)avc->m.Date;
118 /* set microseconds to be dataversion # so that we approximate NFS-style
119 * use of mtime as a dataversion #. We take it mod 512K because
120 * microseconds *must* be less than a million, and 512K is the biggest
121 * power of 2 less than such. DataVersions are typically pretty small
122 * anyway, so the difference between 512K and 1000000 shouldn't matter
123 * much, and "&" is a lot faster than "%".
125 #if defined(AFS_DARWIN_ENV) || defined(AFS_FBSD_ENV)
126 /* nfs on these systems puts an 0 in nsec and stores the nfs usec (aka
127 dataversion) in va_gen */
129 attrs->va_atime.tv_nsec = attrs->va_mtime.tv_nsec =
130 attrs->va_ctime.tv_nsec = 0;
131 attrs->va_gen = hgetlo(avc->m.DataVersion);
132 #elif defined(AFS_SGI_ENV) || defined(AFS_SUN5_ENV) || defined(AFS_AIX41_ENV) || defined(AFS_OBSD_ENV)
133 attrs->va_atime.tv_nsec = attrs->va_mtime.tv_nsec =
134 attrs->va_ctime.tv_nsec = (hgetlo(avc->m.DataVersion) & 0x7ffff) * 1000;
136 attrs->va_atime.tv_usec = attrs->va_mtime.tv_usec =
137 attrs->va_ctime.tv_usec = (hgetlo(avc->m.DataVersion) & 0x7ffff);
139 #if defined(AFS_DARWIN_ENV) || defined(AFS_XBSD_ENV) || defined(AFS_OSF_ENV)
142 #if defined(AFS_SGI_ENV) || defined(AFS_SUN5_ENV)
143 attrs->va_blksize = PAGESIZE; /* XXX Was 8192 XXX */
145 attrs->va_blocksize = PAGESIZE; /* XXX Was 8192 XXX */
148 /* Have to use real device #s in Ultrix, since that's how FS type is
149 * encoded. If rdev doesn't match Ultrix equivalent of statfs's rdev, then
150 * "df ." doesn't work.
152 if (afs_globalVFS && afs_globalVFS->vfs_data)
153 attrs->va_rdev = ((struct mount *)(afs_globalVFS->vfs_data))->m_dev;
155 attrs->va_rdev = 1; /* better than nothing */
159 #if defined(AFS_HPUX110_ENV)
160 if (afs_globalVFS) 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_OSF_ENV) && !defined(AFS_DARWIN_ENV) && !defined(AFS_XBSD_ENV)
168 #if !defined(AFS_HPUX_ENV)
170 attrs->va_nblocks = (attrs->va_size? ((attrs->va_size + 1023)>>10) << 1 : 0);
171 #elif defined(AFS_SGI_ENV)
172 attrs->va_blocks = BTOBB(attrs->va_size);
174 attrs->va_blocks = (attrs->va_size? ((attrs->va_size + 1023)>>10) << 1 : 0);
176 #else /* !defined(AFS_HPUX_ENV) */
177 attrs->va_blocks = (attrs->va_size? ((attrs->va_size + 1023)>>10) : 0);
178 #endif /* !defined(AFS_HPUX_ENV) */
179 #else /* ! AFS_OSF_ENV && !AFS_DARWIN_ENV && !AFS_XBSD_ENV */
180 attrs->va_bytes = (attrs->va_size? (attrs->va_size + 1023) : 1024);
182 attrs->va_bytes_rsv = -1;
184 #endif /* ! AFS_OSF_ENV && !AFS_DARWIN_ENV && !AFS_XBSD_ENV */
186 #ifdef AFS_LINUX22_ENV
187 /* And linux has its own stash as well. */
188 vattr2inode(AFSTOV(avc), attrs);
192 afs_Trace2(afs_iclSetp, CM_TRACE_STATACLX,
193 ICL_TYPE_POINTER, attrs->va_acl,
194 ICL_TYPE_INT32, attrs->va_aclsiz);
195 if (attrs->va_acl && attrs->va_aclsiz >= 12) {
198 ap = (struct acl *) attrs->va_acl;
200 ap->acl_mode = ACL_MODE;
204 /* temporary fix ? */
205 attrs->va_aclsiz = 1;
213 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
214 int afs_getattr(OSI_VC_DECL(avc), struct vattr *attrs, int flags, struct AFS_UCRED *acred)
216 int afs_getattr(OSI_VC_DECL(avc), struct vattr *attrs, struct AFS_UCRED *acred)
220 struct vrequest treq;
221 extern struct unixuser *afs_FindUser();
226 AFS_STATCNT(afs_getattr);
227 afs_Trace2(afs_iclSetp, CM_TRACE_GETATTR, ICL_TYPE_POINTER, avc,
228 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->m.Length));
230 if (afs_fakestat_enable && avc->mvstat == 1) {
231 struct afs_fakestat_state fakestat;
233 code = afs_InitReq(&treq, acred);
234 if (code) return code;
235 afs_InitFakeStat(&fakestat);
236 code = afs_TryEvalFakeStat(&avc, &fakestat, &treq);
238 afs_PutFakeStat(&fakestat);
242 code = afs_CopyOutAttrs(avc, attrs);
243 afs_PutFakeStat(&fakestat);
247 #if defined(AFS_SUN5_ENV)
248 if (flags & ATTR_HINT) {
249 code = afs_CopyOutAttrs(avc, attrs);
253 #if defined(AFS_DARWIN_ENV)
254 if (avc->states & CUBCinit) {
255 code = afs_CopyOutAttrs(avc, attrs);
260 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV) || defined(AFS_SUN5_ENV)
261 afs_BozonLock(&avc->pvnLock, avc);
264 if (afs_shuttingdown) return EIO;
266 if (!(avc->states & CStatd)) {
267 if (!(code = afs_InitReq(&treq, acred))) {
268 code = afs_VerifyVCache2(avc, &treq);
274 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV) || defined(AFS_SUN5_ENV)
275 if (code == 0) osi_FlushPages(avc, acred);
276 afs_BozonUnlock(&avc->pvnLock, avc);
281 osi_FlushText(avc); /* only needed to flush text if text locked last time */
282 code = afs_CopyOutAttrs(avc, attrs);
284 if (afs_nfsexporter) {
286 if ((code = afs_InitReq(&treq, acred)))
290 if (AFS_NFSXLATORREQ(acred)) {
291 if ((vType(avc) != VDIR) &&
292 !afs_AccessOK(avc, PRSFS_READ, &treq,
293 CHECK_MODE_BITS|CMB_ALLOW_EXEC_AS_READ)) {
296 if (avc->mvstat == 2) {
297 #if defined(AFS_SGI_ENV) || defined(AFS_SUN5_ENV) || defined(AFS_AIX41_ENV) || defined(AFS_DARWIN_ENV) || defined(AFS_XBSD_ENV)
298 attrs->va_mtime.tv_nsec += ((++avc->xlatordv) * 1000);
300 attrs->va_mtime.tv_usec += ++avc->xlatordv;
304 if ((au = afs_FindUser(treq.uid, -1, READ_LOCK))) {
305 register struct afs_exporter *exporter = au->exporter;
307 if (exporter && !(afs_nfsexporter->exp_states & EXP_UNIXMODE)) {
310 * If the remote user wishes to enforce default Unix mode semantics,
311 * like in the nfs exporter case, we OR in the user bits
312 * into the group and other bits. We need to do this
313 * because there is no RFS_ACCESS call and thus nfs
314 * clients implement nfs_access by interpreting the
315 * mode bits in the traditional way, which of course
318 ubits = (attrs->va_mode & 0700) >> 6;
319 attrs->va_mode = attrs->va_mode | ubits | (ubits << 3);
320 /* If it's the root of AFS, replace the inode number with the
321 * inode number of the mounted on directory; otherwise this
322 * confuses getwd()... */
323 #ifdef AFS_LINUX22_ENV
324 if (avc == afs_globalVp) {
325 struct inode *ip = avc->v.i_sb->s_root->d_inode;
326 attrs->va_nodeid = ip->i_ino;
329 if (AFSTOV(avc)->v_flag & VROOT) {
330 struct vnode *vp = AFSTOV(avc);
332 vp = vp->v_vfsp->vfs_vnodecovered;
333 if (vp) { /* Ignore weird failures */
335 attrs->va_nodeid = VnodeToIno(vp);
339 ip = (struct inode *) VTOI(vp);
340 if (ip) /* Ignore weird failures */
341 attrs->va_nodeid = ip->i_number;
345 #endif /* AFS_LINUX22_ENV */
347 afs_PutUser(au, READ_LOCK);
353 code = afs_CheckCode(code, &treq, 14);
357 /* convert a Unix request into a status store request */
358 int afs_VAttrToAS(register struct vcache *avc, register struct vattr *av,
359 register struct AFSStoreStatus *as)
363 AFS_STATCNT(afs_VAttrToAS);
364 #if defined(AFS_AIX_ENV)
365 /* Boy, was this machine dependent bogosity hard to swallow????.... */
366 if (av->va_mode != -1) {
368 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV) || defined(AFS_LINUX22_ENV)
369 if (av->va_mask & AT_MODE) {
371 if (av->va_mode != ((unsigned short)-1)) {
375 as->UnixModeBits = av->va_mode & 0xffff;
376 if (avc->states & CForeign) {
377 ObtainWriteLock(&avc->lock,127);
378 afs_FreeAllAxs(&(avc->Access));
379 ReleaseWriteLock(&avc->lock);
383 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV) || defined(AFS_LINUX22_ENV)
384 if (av->va_mask & AT_GID) {
386 #if (defined(AFS_HPUX_ENV) || defined(AFS_SUN_ENV))
387 #if defined(AFS_HPUX102_ENV)
388 if (av->va_gid != GID_NO_CHANGE) {
390 if (av->va_gid != ((unsigned short)-1)) {
393 if (av->va_gid != -1) {
395 #endif /* AFS_SUN5_ENV */
396 mask |= AFS_SETGROUP;
397 as->Group = av->va_gid;
400 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV) || defined(AFS_LINUX22_ENV)
401 if (av->va_mask & AT_UID) {
403 #if (defined(AFS_HPUX_ENV) || defined(AFS_SUN_ENV))
404 #if defined(AFS_HPUX102_ENV)
405 if (av->va_uid != UID_NO_CHANGE) {
407 if (av->va_uid != ((unsigned short)-1)) {
410 if (av->va_uid != -1) {
412 #endif /* AFS_SUN5_ENV */
413 mask |= AFS_SETOWNER;
414 as->Owner = av->va_uid;
416 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV) || defined(AFS_LINUX22_ENV)
417 if (av->va_mask & AT_MTIME) {
419 if (av->va_mtime.tv_sec != -1) {
421 mask |= AFS_SETMODTIME;
423 #if defined(AFS_SUN5_ENV) || defined(AFS_AIX41_ENV) || defined(AFS_DARWIN_ENV) || defined(AFS_XBSD_ENV)
424 if (av->va_mtime.tv_nsec == -1)
426 if (av->va_mtime.tv_usec == -1)
428 as->ClientModTime = osi_Time(); /* special Sys V compat hack for Suns */
431 as->ClientModTime = av->va_mtime.tv_sec;
437 /* We don't set CDirty bit in avc->states because setattr calls WriteVCache
438 * synchronously, therefore, it's not needed.
440 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
441 int afs_setattr(OSI_VC_DECL(avc), register struct vattr *attrs, int flags, struct AFS_UCRED *acred)
443 int afs_setattr(OSI_VC_DECL(avc), register struct vattr *attrs, struct AFS_UCRED *acred)
446 struct vrequest treq;
447 struct AFSStoreStatus astat;
448 register afs_int32 code;
449 struct afs_fakestat_state fakestate;
452 AFS_STATCNT(afs_setattr);
453 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV) || defined(AFS_LINUX22_ENV)
454 afs_Trace4(afs_iclSetp, CM_TRACE_SETATTR, ICL_TYPE_POINTER, avc,
455 ICL_TYPE_INT32, attrs->va_mask,
456 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(attrs->va_size),
457 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->m.Length));
459 afs_Trace4(afs_iclSetp, CM_TRACE_SETATTR, ICL_TYPE_POINTER, avc,
460 ICL_TYPE_INT32, attrs->va_mode,
461 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(attrs->va_size),
462 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->m.Length));
464 if ((code = afs_InitReq(&treq, acred))) return code;
466 afs_InitFakeStat(&fakestate);
467 code = afs_EvalFakeStat(&avc, &fakestate, &treq);
471 if (avc->states & CRO) {
475 #if defined(AFS_SGI_ENV)
476 /* ignore ATTR_LAZY calls - they are really only for keeping
477 * the access/mtime of mmaped files up to date
479 if (flags & ATTR_LAZY)
483 /* if file size has changed, we need write access, otherwise (e.g.
484 * chmod) give it a shot; if it fails, we'll discard the status
487 * Note that Ultrix actually defines ftruncate of a file you have open to
488 * be O.K., and does the proper access checks itself in the truncate
489 * path (unlike BSD or SUNOS), so we skip this check for Ultrix.
492 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV) || defined(AFS_LINUX22_ENV)
493 if (attrs->va_mask & AT_SIZE) {
496 if (attrs->va_size != VNOVAL) {
499 if (attrs->va_size != -1) {
501 if (attrs->va_size != ~0) {
505 if (!afs_AccessOK(avc, PRSFS_WRITE, &treq, DONT_CHECK_MODE_BITS)) {
512 afs_VAttrToAS(avc, attrs, &astat); /* interpret request */
514 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV) || defined(AFS_SUN5_ENV)
515 afs_BozonLock(&avc->pvnLock, avc);
517 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
518 if (AFS_NFSXLATORREQ(acred)) {
519 avc->execsOrWriters++;
523 #if defined(AFS_SGI_ENV)
524 AFS_RWLOCK((vnode_t *)avc, VRWLOCK_WRITE);
526 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV) || defined(AFS_LINUX22_ENV)
527 if (attrs->va_mask & AT_SIZE) {
529 #if defined(AFS_OSF_ENV)
530 if (attrs->va_size != VNOVAL) {
531 #else /* AFS_OSF_ENV */
532 if (attrs->va_size != -1) {
535 afs_size_t tsize = attrs->va_size;
536 ObtainWriteLock(&avc->lock,128);
537 avc->states |= CDirty;
538 code = afs_TruncateAllSegments(avc, tsize, &treq, acred);
539 /* if date not explicitly set by this call, set it ourselves, since we
540 * changed the data */
541 if (!(astat.Mask & AFS_SETMODTIME)) {
542 astat.Mask |= AFS_SETMODTIME;
543 astat.ClientModTime = osi_Time();
546 if ( ( (avc->execsOrWriters <= 0 ) && (avc->states & CCreating) == 0)
547 || ( avc->execsOrWriters == 1 && AFS_NFSXLATORREQ(acred)) ) {
548 code = afs_StoreAllSegments(avc, &treq, AFS_ASYNC);
550 avc->states &= ~CDirty;
553 avc->states &= ~CDirty;
555 ReleaseWriteLock(&avc->lock);
557 osi_FlushText(avc); /* do this after releasing all locks */
559 /* in case we changed the size here, propagate it to gp->g_size */
560 afs_gfshack((struct gnode *)avc);
564 ObtainSharedLock(&avc->lock,16); /* lock entry */
565 code = afs_WriteVCache(avc, &astat, &treq); /* send request */
566 ReleaseSharedLock(&avc->lock); /* release lock */
569 ObtainWriteLock(&afs_xcbhash, 487);
570 afs_DequeueCallback(avc);
571 avc->states &= ~CStatd;
572 ReleaseWriteLock(&afs_xcbhash);
573 if (avc->fid.Fid.Vnode & 1 || (vType(avc) == VDIR))
574 osi_dnlc_purgedp(avc);
575 /* error? erase any changes we made to vcache entry */
578 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
579 if (AFS_NFSXLATORREQ(acred)) {
580 avc->execsOrWriters--;
583 #if defined(AFS_SUN_ENV) || defined(AFS_OSF_ENV) || defined(AFS_SUN5_ENV)
584 afs_BozonUnlock(&avc->pvnLock, avc);
586 #if defined(AFS_SGI_ENV)
587 AFS_RWUNLOCK((vnode_t *)avc, VRWLOCK_WRITE);
590 afs_PutFakeStat(&fakestate);
591 code = afs_CheckCode(code, &treq, 15);