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;
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;
44 AFS_STATCNT(afs_CopyOutAttrs);
45 if (afs_fakestat_enable && avc->mvstat == 1)
47 #if defined(AFS_MACH_ENV )
48 attrs->va_mode = fakedir ? VDIR | 0755 : vType(avc) | (avc->m.Mode&~VFMT);
49 #else /* AFS_MACH_ENV */
50 attrs->va_type = fakedir ? VDIR : vType(avc);
51 #if defined(AFS_SGI_ENV) || defined(AFS_AIX32_ENV) || defined(AFS_SUN5_ENV)
52 attrs->va_mode = fakedir ? 0755 : (mode_t)(avc->m.Mode & 0xffff);
54 attrs->va_mode = fakedir ? VDIR | 0755 : avc->m.Mode;
56 #endif /* AFS_MACH_ENV */
58 if (avc->m.Mode & (VSUID|VSGID)) {
59 /* setuid or setgid, make sure we're allowed to run them from this cell */
60 tcell = afs_GetCell(avc->fid.Cell, 0);
61 if (tcell && (tcell->states & CNoSUID))
62 attrs->va_mode &= ~(VSUID|VSGID);
64 attrs->va_uid = fakedir ? 0 : avc->m.Owner;
65 attrs->va_gid = fakedir ? 0 : avc->m.Group; /* yeah! */
66 #if defined(AFS_SUN56_ENV)
67 attrs->va_fsid = avc->v.v_vfsp->vfs_fsid.val[0];
70 /* XXX We try making this match the vfs's dev field XXX */
74 attrs->va_fsid = avc->v.v_mount->m_stat.f_fsid.val[0];
79 #endif /* AFS_SUN56_ENV */
80 if (avc->mvstat == 2) {
81 tvp = afs_GetVolume(&avc->fid, 0, READ_LOCK);
82 /* The mount point's vnode. */
85 tvp->mtpoint.Fid.Vnode + (tvp->mtpoint.Fid.Volume << 16);
86 if (FidCmp(&afs_rootFid, &avc->fid) && !attrs->va_nodeid)
88 afs_PutVolume(tvp, READ_LOCK);
90 else attrs->va_nodeid = 2;
92 else attrs->va_nodeid = avc->fid.Fid.Vnode + (avc->fid.Fid.Volume << 16);
93 attrs->va_nodeid &= 0x7fffffff; /* Saber C hates negative inode #s! */
94 attrs->va_nlink = fakedir ? 100 : avc->m.LinkCount;
95 attrs->va_size = fakedir ? 4096 : avc->m.Length;
96 attrs->va_atime.tv_sec = attrs->va_mtime.tv_sec = attrs->va_ctime.tv_sec =
97 fakedir ? 0 : (int)avc->m.Date;
98 /* set microseconds to be dataversion # so that we approximate NFS-style
99 * use of mtime as a dataversion #. We take it mod 512K because
100 * microseconds *must* be less than a million, and 512K is the biggest
101 * power of 2 less than such. DataVersions are typically pretty small
102 * anyway, so the difference between 512K and 1000000 shouldn't matter
103 * much, and "&" is a lot faster than "%".
105 #if defined(AFS_DARWIN_ENV) || defined(AFS_FBSD_ENV)
106 /* nfs on these systems puts an 0 in nsec and stores the nfs usec (aka
107 dataversion) in va_gen */
109 attrs->va_atime.tv_nsec = attrs->va_mtime.tv_nsec =
110 attrs->va_ctime.tv_nsec = 0;
111 attrs->va_gen = hgetlo(avc->m.DataVersion);
112 #elif defined(AFS_SGI_ENV) || defined(AFS_SUN5_ENV) || defined(AFS_AIX41_ENV) || defined(AFS_OBSD_ENV)
113 attrs->va_atime.tv_nsec = attrs->va_mtime.tv_nsec =
114 attrs->va_ctime.tv_nsec = (hgetlo(avc->m.DataVersion) & 0x7ffff) * 1000;
116 attrs->va_atime.tv_usec = attrs->va_mtime.tv_usec =
117 attrs->va_ctime.tv_usec = (hgetlo(avc->m.DataVersion) & 0x7ffff);
119 #if defined(AFS_DARWIN_ENV) || defined(AFS_XBSD_ENV) || defined(AFS_OSF_ENV)
122 #if defined(AFS_SGI_ENV) || defined(AFS_SUN5_ENV)
123 attrs->va_blksize = PAGESIZE; /* XXX Was 8192 XXX */
125 attrs->va_blocksize = PAGESIZE; /* XXX Was 8192 XXX */
128 /* Have to use real device #s in Ultrix, since that's how FS type is
129 * encoded. If rdev doesn't match Ultrix equivalent of statfs's rdev, then
130 * "df ." doesn't work.
132 if (afs_globalVFS && afs_globalVFS->vfs_data)
133 attrs->va_rdev = ((struct mount *)(afs_globalVFS->vfs_data))->m_dev;
135 attrs->va_rdev = 1; /* better than nothing */
141 * Below return 0 (and not 1) blocks if the file is zero length. This conforms
142 * better with the other filesystems that do return 0.
144 #if !defined(AFS_OSF_ENV) && !defined(AFS_DARWIN_ENV) && !defined(AFS_XBSD_ENV)
145 #if !defined(AFS_HPUX_ENV)
147 attrs->va_nblocks = (attrs->va_size? ((attrs->va_size + 1023)>>10) << 1 : 0);
148 #elif defined(AFS_SGI_ENV)
149 attrs->va_blocks = BTOBB(attrs->va_size);
151 attrs->va_blocks = (attrs->va_size? ((attrs->va_size + 1023)>>10) << 1 : 0);
153 #else /* !defined(AFS_HPUX_ENV) */
154 attrs->va_blocks = (attrs->va_size? ((attrs->va_size + 1023)>>10) : 0);
155 #endif /* !defined(AFS_HPUX_ENV) */
156 #else /* ! AFS_OSF_ENV && !AFS_DARWIN_ENV && !AFS_XBSD_ENV */
157 attrs->va_bytes = (attrs->va_size? (attrs->va_size + 1023) : 1024);
159 attrs->va_bytes_rsv = -1;
161 #endif /* ! AFS_OSF_ENV && !AFS_DARWIN_ENV && !AFS_XBSD_ENV */
163 #ifdef AFS_LINUX22_ENV
164 /* And linux has its own stash as well. */
165 vattr2inode(AFSTOV(avc), attrs);
169 afs_Trace2(afs_iclSetp, CM_TRACE_STATACLX,
170 ICL_TYPE_POINTER, attrs->va_acl,
171 ICL_TYPE_INT32, attrs->va_aclsiz);
172 if (attrs->va_acl && attrs->va_aclsiz >= 12) {
175 ap = (struct acl *) attrs->va_acl;
177 ap->acl_mode = ACL_MODE;
181 /* temporary fix ? */
182 attrs->va_aclsiz = 1;
190 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
191 int afs_getattr(OSI_VC_DECL(avc), struct vattr *attrs, int flags, struct AFS_UCRED *acred)
193 int afs_getattr(OSI_VC_DECL(avc), struct vattr *attrs, struct AFS_UCRED *acred)
197 struct vrequest treq;
198 extern struct unixuser *afs_FindUser();
203 AFS_STATCNT(afs_getattr);
204 afs_Trace2(afs_iclSetp, CM_TRACE_GETATTR, ICL_TYPE_POINTER, avc,
205 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->m.Length));
207 if (afs_fakestat_enable && avc->mvstat == 1) {
208 struct afs_fakestat_state fakestat;
210 code = afs_InitReq(&treq, acred);
211 if (code) return code;
212 afs_InitFakeStat(&fakestat);
213 code = afs_TryEvalFakeStat(&avc, &fakestat, &treq);
215 afs_PutFakeStat(&fakestat);
219 code = afs_CopyOutAttrs(avc, attrs);
220 afs_PutFakeStat(&fakestat);
224 #if defined(AFS_SUN5_ENV)
225 if (flags & ATTR_HINT) {
226 code = afs_CopyOutAttrs(avc, attrs);
230 #if defined(AFS_DARWIN_ENV)
231 if (avc->states & CUBCinit) {
232 code = afs_CopyOutAttrs(avc, attrs);
237 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV) || defined(AFS_SUN5_ENV)
238 afs_BozonLock(&avc->pvnLock, avc);
241 if (afs_shuttingdown) return EIO;
243 if (!(avc->states & CStatd)) {
244 if (!(code = afs_InitReq(&treq, acred))) {
245 code = afs_VerifyVCache2(avc, &treq);
251 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV) || defined(AFS_SUN5_ENV)
252 if (code == 0) osi_FlushPages(avc, acred);
253 afs_BozonUnlock(&avc->pvnLock, avc);
258 osi_FlushText(avc); /* only needed to flush text if text locked last time */
259 code = afs_CopyOutAttrs(avc, attrs);
261 if (afs_nfsexporter) {
263 if ((code = afs_InitReq(&treq, acred)))
267 if (AFS_NFSXLATORREQ(acred)) {
268 if ((vType(avc) != VDIR) &&
269 !afs_AccessOK(avc, PRSFS_READ, &treq,
270 CHECK_MODE_BITS|CMB_ALLOW_EXEC_AS_READ)) {
273 if (avc->mvstat == 2) {
274 #if defined(AFS_SGI_ENV) || defined(AFS_SUN5_ENV) || defined(AFS_AIX41_ENV) || defined(AFS_DARWIN_ENV) || defined(AFS_XBSD_ENV)
275 attrs->va_mtime.tv_nsec += ((++avc->xlatordv) * 1000);
277 attrs->va_mtime.tv_usec += ++avc->xlatordv;
281 if ((au = afs_FindUser(treq.uid, -1, READ_LOCK))) {
282 register struct afs_exporter *exporter = au->exporter;
284 if (exporter && !(afs_nfsexporter->exp_states & EXP_UNIXMODE)) {
287 * If the remote user wishes to enforce default Unix mode semantics,
288 * like in the nfs exporter case, we OR in the user bits
289 * into the group and other bits. We need to do this
290 * because there is no RFS_ACCESS call and thus nfs
291 * clients implement nfs_access by interpreting the
292 * mode bits in the traditional way, which of course
295 ubits = (attrs->va_mode & 0700) >> 6;
296 attrs->va_mode = attrs->va_mode | ubits | (ubits << 3);
297 /* If it's the root of AFS, replace the inode number with the
298 * inode number of the mounted on directory; otherwise this
299 * confuses getwd()... */
300 #ifdef AFS_LINUX22_ENV
301 if (avc == afs_globalVp) {
302 struct inode *ip = avc->v.i_sb->s_root->d_inode;
303 attrs->va_nodeid = ip->i_ino;
306 if (AFSTOV(avc)->v_flag & VROOT) {
307 struct vnode *vp = AFSTOV(avc);
309 vp = vp->v_vfsp->vfs_vnodecovered;
310 if (vp) { /* Ignore weird failures */
312 attrs->va_nodeid = VnodeToIno(vp);
316 ip = (struct inode *) VTOI(vp);
317 if (ip) /* Ignore weird failures */
318 attrs->va_nodeid = ip->i_number;
322 #endif /* AFS_LINUX22_ENV */
324 afs_PutUser(au, READ_LOCK);
330 code = afs_CheckCode(code, &treq, 14);
334 /* convert a Unix request into a status store request */
335 int afs_VAttrToAS(register struct vcache *avc, register struct vattr *av,
336 register struct AFSStoreStatus *as)
340 AFS_STATCNT(afs_VAttrToAS);
341 #if defined(AFS_AIX_ENV)
342 /* Boy, was this machine dependent bogosity hard to swallow????.... */
343 if (av->va_mode != -1) {
345 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV) || defined(AFS_LINUX22_ENV)
346 if (av->va_mask & AT_MODE) {
348 if (av->va_mode != ((unsigned short)-1)) {
352 as->UnixModeBits = av->va_mode & 0xffff;
353 if (avc->states & CForeign) {
354 ObtainWriteLock(&avc->lock,127);
355 afs_FreeAllAxs(&(avc->Access));
356 ReleaseWriteLock(&avc->lock);
360 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV) || defined(AFS_LINUX22_ENV)
361 if (av->va_mask & AT_GID) {
363 #if (defined(AFS_HPUX_ENV) || defined(AFS_SUN_ENV))
364 #if defined(AFS_HPUX102_ENV)
365 if (av->va_gid != GID_NO_CHANGE) {
367 if (av->va_gid != ((unsigned short)-1)) {
370 if (av->va_gid != -1) {
372 #endif /* AFS_SUN5_ENV */
373 mask |= AFS_SETGROUP;
374 as->Group = av->va_gid;
377 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV) || defined(AFS_LINUX22_ENV)
378 if (av->va_mask & AT_UID) {
380 #if (defined(AFS_HPUX_ENV) || defined(AFS_SUN_ENV))
381 #if defined(AFS_HPUX102_ENV)
382 if (av->va_uid != UID_NO_CHANGE) {
384 if (av->va_uid != ((unsigned short)-1)) {
387 if (av->va_uid != -1) {
389 #endif /* AFS_SUN5_ENV */
390 mask |= AFS_SETOWNER;
391 as->Owner = av->va_uid;
393 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV) || defined(AFS_LINUX22_ENV)
394 if (av->va_mask & AT_MTIME) {
396 if (av->va_mtime.tv_sec != -1) {
398 mask |= AFS_SETMODTIME;
400 #if defined(AFS_SUN5_ENV) || defined(AFS_AIX41_ENV) || defined(AFS_DARWIN_ENV) || defined(AFS_XBSD_ENV)
401 if (av->va_mtime.tv_nsec == -1)
403 if (av->va_mtime.tv_usec == -1)
405 as->ClientModTime = osi_Time(); /* special Sys V compat hack for Suns */
408 as->ClientModTime = av->va_mtime.tv_sec;
414 /* We don't set CDirty bit in avc->states because setattr calls WriteVCache
415 * synchronously, therefore, it's not needed.
417 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
418 int afs_setattr(OSI_VC_DECL(avc), register struct vattr *attrs, int flags, struct AFS_UCRED *acred)
420 int afs_setattr(OSI_VC_DECL(avc), register struct vattr *attrs, struct AFS_UCRED *acred)
423 struct vrequest treq;
424 struct AFSStoreStatus astat;
425 register afs_int32 code;
426 struct afs_fakestat_state fakestate;
429 AFS_STATCNT(afs_setattr);
430 afs_Trace2(afs_iclSetp, CM_TRACE_SETATTR, ICL_TYPE_POINTER, avc,
431 ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->m.Length));
432 if ((code = afs_InitReq(&treq, acred))) return code;
434 afs_InitFakeStat(&fakestate);
435 code = afs_EvalFakeStat(&avc, &fakestate, &treq);
439 if (avc->states & CRO) {
443 #if defined(AFS_SGI_ENV)
444 /* ignore ATTR_LAZY calls - they are really only for keeping
445 * the access/mtime of mmaped files up to date
447 if (flags & ATTR_LAZY)
451 /* if file size has changed, we need write access, otherwise (e.g.
452 * chmod) give it a shot; if it fails, we'll discard the status
455 * Note that Ultrix actually defines ftruncate of a file you have open to
456 * be O.K., and does the proper access checks itself in the truncate
457 * path (unlike BSD or SUNOS), so we skip this check for Ultrix.
460 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV) || defined(AFS_LINUX22_ENV)
461 if (attrs->va_mask & AT_SIZE) {
464 if (attrs->va_size != VNOVAL) {
467 if (attrs->va_size != -1) {
469 if (attrs->va_size != ~0) {
473 if (!afs_AccessOK(avc, PRSFS_WRITE, &treq, DONT_CHECK_MODE_BITS)) {
480 afs_VAttrToAS(avc, attrs, &astat); /* interpret request */
482 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV) || defined(AFS_SUN5_ENV)
483 afs_BozonLock(&avc->pvnLock, avc);
485 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
486 if (AFS_NFSXLATORREQ(acred)) {
487 avc->execsOrWriters++;
491 #if defined(AFS_SGI_ENV)
492 AFS_RWLOCK((vnode_t *)avc, VRWLOCK_WRITE);
494 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV) || defined(AFS_LINUX22_ENV)
495 if (attrs->va_mask & AT_SIZE) {
497 #if defined(AFS_OSF_ENV)
498 if (attrs->va_size != VNOVAL) {
499 #else /* AFS_OSF_ENV */
500 if (attrs->va_size != -1) {
503 afs_size_t tsize = attrs->va_size;
504 ObtainWriteLock(&avc->lock,128);
505 avc->states |= CDirty;
506 code = afs_TruncateAllSegments(avc, tsize, &treq, acred);
507 /* if date not explicitly set by this call, set it ourselves, since we
508 * changed the data */
509 if (!(astat.Mask & AFS_SETMODTIME)) {
510 astat.Mask |= AFS_SETMODTIME;
511 astat.ClientModTime = osi_Time();
514 if ( ( (avc->execsOrWriters <= 0 ) && (avc->states & CCreating) == 0)
515 || ( avc->execsOrWriters == 1 && AFS_NFSXLATORREQ(acred)) ) {
516 code = afs_StoreAllSegments(avc, &treq, AFS_ASYNC);
518 avc->states &= ~CDirty;
521 avc->states &= ~CDirty;
523 ReleaseWriteLock(&avc->lock);
525 osi_FlushText(avc); /* do this after releasing all locks */
527 /* in case we changed the size here, propagate it to gp->g_size */
528 afs_gfshack((struct gnode *)avc);
532 ObtainSharedLock(&avc->lock,16); /* lock entry */
533 code = afs_WriteVCache(avc, &astat, &treq); /* send request */
534 ReleaseSharedLock(&avc->lock); /* release lock */
537 ObtainWriteLock(&afs_xcbhash, 487);
538 afs_DequeueCallback(avc);
539 avc->states &= ~CStatd;
540 ReleaseWriteLock(&afs_xcbhash);
541 if (avc->fid.Fid.Vnode & 1 || (vType(avc) == VDIR))
542 osi_dnlc_purgedp(avc);
543 /* error? erase any changes we made to vcache entry */
546 #if defined(AFS_SUN5_ENV) || defined(AFS_SGI_ENV)
547 if (AFS_NFSXLATORREQ(acred)) {
548 avc->execsOrWriters--;
551 #if defined(AFS_SUN_ENV) || defined(AFS_OSF_ENV) || defined(AFS_SUN5_ENV)
552 afs_BozonUnlock(&avc->pvnLock, avc);
554 #if defined(AFS_SGI_ENV)
555 AFS_RWUNLOCK((vnode_t *)avc, VRWLOCK_WRITE);
558 afs_PutFakeStat(&fakestate);
559 code = afs_CheckCode(code, &treq, 15);