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
22 #include <afsconfig.h>
23 #include "../afs/param.h"
27 #include "../afs/sysincludes.h" /* Standard vendor system headers */
28 #include "../afs/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"
35 extern afs_rwlock_t afs_xvcache;
36 extern afs_rwlock_t afs_xcbhash;
41 * Wire down file in cache: prefetch all data, and turn on CWired flag
42 * so that callbacks/callback expirations are (temporarily) ignored
43 * and cache file(s) are kept in cache. File will be unwired when
44 * afs_inactive is called (ie no one has VN_HOLD on vnode), or when
45 * afs_IsWired notices that the file is no longer Active.
48 #else /* AFS_OSF_ENV */
49 static void FetchWholeEnchilada(avc, areq)
51 struct vrequest *areq;
52 register struct vcache *avc; {
53 register afs_int32 nextChunk;
54 register struct dcache *tdc;
55 afs_size_t pos, offset, len;
57 AFS_STATCNT(FetchWholeEnchilada);
58 if ((avc->states & CStatd) == 0) return; /* don't know size */
59 for(nextChunk=0;nextChunk<1024;nextChunk++) { /* sanity check on N chunks */
60 pos = AFS_CHUNKTOBASE(nextChunk);
61 #if defined(AFS_OSF_ENV)
62 if (pos >= avc->m.Length) break; /* all done */
63 #else /* AFS_OSF_ENV */
64 if (pos >= avc->m.Length) return; /* all done */
66 tdc = afs_GetDCache(avc, pos, areq, &offset, &len, 0);
68 #if defined(AFS_OSF_ENV)
70 #else /* AFS_OSF_ENV */
75 #if defined(AFS_OSF_ENV)
76 avc->states |= CWired;
77 #endif /* AFS_OSF_ENV */
80 #if defined(AFS_OSF_ENV)
82 * Tests whether file is wired down, after unwiring the file if it
83 * is found to be inactive (ie not open and not being paged from).
86 register struct vcache *avc; {
87 if (avc->states & CWired) {
88 if (osi_Active(avc)) {
91 avc->states &= ~CWired;
95 #endif /* AFS_OSF_ENV */
97 afsremove(adp, tdc, tvc, aname, acred, treqp)
98 register struct vcache *adp;
99 register struct dcache *tdc;
100 register struct vcache *tvc;
102 struct vrequest *treqp;
103 struct AFS_UCRED *acred; {
104 register afs_int32 code;
105 register struct conn *tc;
106 struct AFSFetchStatus OutDirStatus;
107 struct AFSVolSync tsync;
111 tc = afs_Conn(&adp->fid, treqp, SHARED_LOCK);
113 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_REMOVEFILE);
114 #ifdef RX_ENABLE_LOCKS
116 #endif /* RX_ENABLE_LOCKS */
117 code = RXAFS_RemoveFile(tc->id, (struct AFSFid *) &adp->fid.Fid,
118 aname, &OutDirStatus, &tsync);
119 #ifdef RX_ENABLE_LOCKS
121 #endif /* RX_ENABLE_LOCKS */
126 (afs_Analyze(tc, code, &adp->fid, treqp,
127 AFS_STATS_FS_RPCIDX_REMOVEFILE, SHARED_LOCK, (struct cell *)0));
129 osi_dnlc_remove (adp, aname, tvc);
130 if (tvc) afs_symhint_inval(tvc); /* XXX: don't really need to be so extreme */
134 ReleaseSharedLock(&tdc->lock);
137 if (tvc) afs_PutVCache(tvc, WRITE_LOCK);
140 ObtainWriteLock(&afs_xcbhash, 497);
141 afs_DequeueCallback(adp);
142 adp->states &= ~CStatd;
143 ReleaseWriteLock(&afs_xcbhash);
144 osi_dnlc_purgedp(adp);
146 ReleaseWriteLock(&adp->lock);
147 code = afs_CheckCode(code, treqp, 21);
150 if (tdc) UpgradeSToWLock(&tdc->lock, 637);
151 if (afs_LocalHero(adp, tdc, &OutDirStatus, 1)) {
152 /* we can do it locally */
153 code = afs_dir_Delete(&tdc->f.inode, aname);
155 ZapDCE(tdc); /* surprise error -- invalid value */
160 ReleaseWriteLock(&tdc->lock);
161 afs_PutDCache(tdc); /* drop ref count */
163 ReleaseWriteLock(&adp->lock);
165 /* now, get vnode for unlinked dude, and see if we should force it
166 * from cache. adp is now the deleted files vnode. Note that we
167 * call FindVCache instead of GetVCache since if the file's really
168 * gone, we won't be able to fetch the status info anyway. */
170 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV) || defined(AFS_SUN5_ENV)
171 afs_BozonLock(&tvc->pvnLock, tvc);
172 /* Since afs_TryToSmush will do a pvn_vptrunc */
174 ObtainWriteLock(&tvc->lock,141);
175 /* note that callback will be broken on the deleted file if there are
176 * still >0 links left to it, so we'll get the stat right */
178 tvc->states &= ~CUnique; /* For the dfs xlator */
179 if (tvc->m.LinkCount == 0 && !osi_Active(tvc)) {
180 if (!AFS_NFSXLATORREQ(acred)) afs_TryToSmush(tvc, acred, 0);
182 ReleaseWriteLock(&tvc->lock);
183 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV) || defined(AFS_SUN5_ENV)
184 afs_BozonUnlock(&tvc->pvnLock, tvc);
186 afs_PutVCache(tvc, WRITE_LOCK);
191 static char *newname() {
192 char *name, *sp, *p = ".__afs";
193 afs_int32 rd = afs_random() & 0xffff;
195 sp = name = osi_AllocSmallSpace(AFS_SMALLOCSIZ);
196 while (*p != '\0') *sp++ = *p++;
198 *sp++= "0123456789ABCDEF"[rd & 0x0f];
205 /* these variables appear to exist for debugging purposes */
206 struct vcache * Tadp1, * Ttvc;
211 /* Note that we don't set CDirty here, this is OK because the unlink
212 * RPC is called synchronously */
215 struct nameidata *ndp; {
216 register struct vcache *adp = (struct vcache *)ndp->ni_dvp;
217 char *aname = ndp->ni_dent.d_name;
218 struct ucred *acred = ndp->ni_cred;
219 #else /* AFS_OSF_ENV */
220 afs_remove(OSI_VC_ARG(adp), aname, acred)
223 struct AFS_UCRED *acred; {
225 struct vrequest treq;
226 register struct dcache *tdc;
227 struct VenusFid unlinkFid;
228 register afs_int32 code;
229 register struct vcache *tvc;
230 afs_size_t offset, len;
231 struct AFSFetchStatus OutDirStatus;
232 struct AFSVolSync tsync;
236 AFS_STATCNT(afs_remove);
237 afs_Trace2(afs_iclSetp, CM_TRACE_REMOVE, ICL_TYPE_POINTER, adp,
238 ICL_TYPE_STRING, aname);
241 tvc = (struct vcache *)ndp->ni_vp; /* should never be null */
244 /* Check if this is dynroot */
245 if (afs_IsDynroot(adp)) {
247 afs_PutVCache(adp, 0);
248 afs_PutVCache(tvc, 0);
250 return afs_DynrootVOPRemove(adp, acred, aname);
253 if (code = afs_InitReq(&treq, acred)) {
255 afs_PutVCache(adp, 0);
256 afs_PutVCache(tvc, 0);
260 if (strlen(aname) > AFSNAMEMAX) {
262 afs_PutVCache(adp, 0);
263 afs_PutVCache(tvc, 0);
268 code = afs_VerifyVCache(adp, &treq);
270 tvc = (struct vcache *)ndp->ni_vp; /* should never be null */
272 afs_PutVCache(adp, 0);
273 afs_PutVCache(tvc, 0);
274 return afs_CheckCode(code, &treq, 22);
276 #else /* AFS_OSF_ENV */
277 tvc = (struct vcache *) 0;
279 code = afs_CheckCode(code, &treq, 23);
284 /** If the volume is read-only, return error without making an RPC to the
287 if ( adp->states & CRO ) {
289 afs_PutVCache(adp, 0);
290 afs_PutVCache(tvc, 0);
296 tdc = afs_GetDCache(adp, (afs_size_t) 0, &treq, &offset, &len, 1); /* test for error below */
297 ObtainWriteLock(&adp->lock,142);
298 ObtainSharedLock(&tdc->lock, 638);
301 * Make sure that the data in the cache is current. We may have
302 * received a callback while we were waiting for the write lock.
304 if (!(adp->states & CStatd)
305 || (tdc && !hsame(adp->m.DataVersion, tdc->f.versionNo))) {
306 ReleaseWriteLock(&adp->lock);
308 ReleaseSharedLock(&tdc->lock);
314 unlinkFid.Fid.Vnode = 0;
316 tvc = osi_dnlc_lookup (adp, aname, WRITE_LOCK);
318 /* This should not be necessary since afs_lookup() has already
322 code = afs_dir_Lookup(&tdc->f.inode, aname, &unlinkFid.Fid);
326 unlinkFid.Cell = adp->fid.Cell;
327 unlinkFid.Fid.Volume = adp->fid.Fid.Volume;
328 if (unlinkFid.Fid.Unique == 0) {
329 tvc = afs_LookupVCache(&unlinkFid, &treq, &cached,
330 WRITE_LOCK, adp, aname);
332 ObtainReadLock(&afs_xvcache);
333 tvc = afs_FindVCache(&unlinkFid, 1, WRITE_LOCK,
335 ReleaseReadLock(&afs_xvcache);
340 if (tvc && osi_Active(tvc)) {
341 /* about to delete whole file, prefetch it first */
342 ReleaseWriteLock(&adp->lock);
343 ObtainWriteLock(&tvc->lock,143);
344 #if defined(AFS_OSF_ENV)
345 afs_Wire(tvc, &treq);
346 #else /* AFS_OSF_ENV */
347 FetchWholeEnchilada(tvc, &treq);
349 ReleaseWriteLock(&tvc->lock);
350 ObtainWriteLock(&adp->lock,144);
353 osi_dnlc_remove ( adp, aname, tvc);
354 if (tvc) afs_symhint_inval(tvc);
356 Tadp1 = adp; Tadpr = VREFCOUNT(adp); Ttvc = tvc; Tnam = aname; Tnam1 = 0;
357 if (tvc) Ttvcr = VREFCOUNT(tvc);
359 if (tvc && (VREFCOUNT(tvc) > 2) && tvc->opens > 0 && !(tvc->states & CUnlinked)) {
361 if (tvc && (VREFCOUNT(tvc) > 1) && tvc->opens > 0 && !(tvc->states & CUnlinked)) {
363 char *unlname = newname();
365 ReleaseWriteLock(&adp->lock);
366 if (tdc) ReleaseSharedLock(&tdc->lock);
367 code = afsrename(adp, aname, adp, unlname, acred);
370 tvc->mvid = (struct VenusFid *)unlname;
376 tvc->states |= CUnlinked;
378 osi_FreeSmallSpace(unlname);
382 afs_PutVCache(tvc, WRITE_LOCK);
384 code = afsremove(adp, tdc, tvc, aname, acred, &treq);
387 afs_PutVCache(adp, WRITE_LOCK);
388 #endif /* AFS_OSF_ENV */
393 /* afs_remunlink -- This tries to delete the file at the server after it has
394 * been renamed when unlinked locally but now has been finally released.
396 * CAUTION -- may be called with avc unheld. */
398 afs_remunlink(avc, doit)
399 register struct vcache *avc;
402 struct AFS_UCRED *cred;
405 struct vrequest treq;
406 struct VenusFid dirFid;
407 register struct dcache *tdc;
410 if (NBObtainWriteLock(&avc->lock, 423))
413 if (avc->mvid && (doit || (avc->states & CUnlinkedDel))) {
414 if (code = afs_InitReq(&treq, avc->uncred)) {
415 ReleaseWriteLock(&avc->lock);
418 /* Must bump the refCount because GetVCache may block.
419 * Also clear mvid so no other thread comes here if we block.
421 unlname = (char *)avc->mvid;
428 /* We'll only try this once. If it fails, just release the vnode.
429 * Clear after doing hold so that NewVCache doesn't find us yet.
431 avc->states &= ~(CUnlinked | CUnlinkedDel);
433 ReleaseWriteLock(&avc->lock);
435 dirFid.Cell = avc->fid.Cell;
436 dirFid.Fid.Volume = avc->fid.Fid.Volume;
437 dirFid.Fid.Vnode = avc->parentVnode;
438 dirFid.Fid.Unique = avc->parentUnique;
439 adp = afs_GetVCache(&dirFid, &treq, (afs_int32 *)0,
440 (struct vcache *)0, WRITE_LOCK);
443 tdc = afs_FindDCache(adp, 0);
444 ObtainWriteLock(&adp->lock, 159);
445 if (tdc) ObtainSharedLock(&tdc->lock, 639);
447 /* afsremove releases the adp & tdc locks, and does vn_rele(avc) */
448 code = afsremove(adp, tdc, avc, unlname, cred, &treq);
449 afs_PutVCache(adp, WRITE_LOCK);
451 /* we failed - and won't be back to try again. */
452 afs_PutVCache(avc, WRITE_LOCK);
454 osi_FreeSmallSpace(unlname);
459 ReleaseWriteLock(&avc->lock);