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
18 #include <afsconfig.h>
19 #include "afs/param.h"
22 #include "afs/sysincludes.h" /* Standard vendor system headers */
23 #include "afsincludes.h" /* Afs-based standard headers */
24 #include "afs/afs_stats.h" /* statistics */
25 #include "afs/afs_cbqueue.h"
26 #include "afs/nfsclient.h"
27 #include "afs/afs_osidnlc.h"
30 extern afs_rwlock_t afs_xvcache;
31 extern afs_rwlock_t afs_xcbhash;
35 FetchWholeEnchilada(struct vcache *avc, struct vrequest *areq)
39 afs_size_t pos, offset, len;
41 AFS_STATCNT(FetchWholeEnchilada);
42 if ((avc->f.states & CStatd) == 0)
43 return; /* don't know size */
44 for (nextChunk = 0; nextChunk < 1024; nextChunk++) { /* sanity check on N chunks */
45 pos = AFS_CHUNKTOBASE(nextChunk);
46 if (pos >= avc->f.m.Length)
47 return; /* all done */
48 tdc = afs_GetDCache(avc, pos, areq, &offset, &len, 0);
56 afsremove(struct vcache *adp, struct dcache *tdc,
57 struct vcache *tvc, char *aname, afs_ucred_t *acred,
58 struct vrequest *treqp)
62 struct AFSFetchStatus OutDirStatus;
63 struct AFSVolSync tsync;
64 struct rx_connection *rxconn;
66 if (!AFS_IS_DISCONNECTED) {
68 tc = afs_Conn(&adp->f.fid, treqp, SHARED_LOCK, &rxconn);
70 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_REMOVEFILE);
73 RXAFS_RemoveFile(rxconn, (struct AFSFid *)&adp->f.fid.Fid,
74 aname, &OutDirStatus, &tsync);
80 (tc, rxconn, code, &adp->f.fid, treqp, AFS_STATS_FS_RPCIDX_REMOVEFILE,
84 osi_dnlc_remove(adp, aname, tvc);
88 ReleaseSharedLock(&tdc->lock);
96 ObtainWriteLock(&afs_xcbhash, 497);
97 afs_DequeueCallback(adp);
98 adp->f.states &= ~CStatd;
99 ReleaseWriteLock(&afs_xcbhash);
100 osi_dnlc_purgedp(adp);
102 ReleaseWriteLock(&adp->lock);
103 code = afs_CheckCode(code, treqp, 21);
107 UpgradeSToWLock(&tdc->lock, 637);
108 if (AFS_IS_DISCON_RW || afs_LocalHero(adp, tdc, &OutDirStatus, 1)) {
109 /* we can do it locally */
110 code = afs_dir_Delete(tdc, aname);
112 ZapDCE(tdc); /* surprise error -- invalid value */
117 ReleaseWriteLock(&tdc->lock);
118 afs_PutDCache(tdc); /* drop ref count */
120 ReleaseWriteLock(&adp->lock);
122 /* now, get vnode for unlinked dude, and see if we should force it
123 * from cache. adp is now the deleted files vnode. Note that we
124 * call FindVCache instead of GetVCache since if the file's really
125 * gone, we won't be able to fetch the status info anyway. */
128 afs_MarinerLog("store$Removing", tvc);
129 #ifdef AFS_BOZONLOCK_ENV
130 afs_BozonLock(&tvc->pvnLock, tvc);
131 /* Since afs_TryToSmush will do a pvn_vptrunc */
133 ObtainWriteLock(&tvc->lock, 141);
134 /* note that callback will be broken on the deleted file if there are
135 * still >0 links left to it, so we'll get the stat right */
136 tvc->f.m.LinkCount--;
137 tvc->f.states &= ~CUnique; /* For the dfs xlator */
138 if (tvc->f.m.LinkCount == 0 && !osi_Active(tvc)) {
139 if (!AFS_NFSXLATORREQ(acred))
140 afs_TryToSmush(tvc, acred, 0);
142 ReleaseWriteLock(&tvc->lock);
143 #ifdef AFS_BOZONLOCK_ENV
144 afs_BozonUnlock(&tvc->pvnLock, tvc);
154 char *name, *sp, *p = ".__afs";
155 afs_int32 rd = afs_random() & 0xffff;
157 sp = name = osi_AllocSmallSpace(AFS_SMALLOCSIZ);
161 *sp++ = "0123456789ABCDEF"[rd & 0x0f];
168 /* these variables appear to exist for debugging purposes */
169 struct vcache *Tadp1, *Ttvc;
174 /* Note that we don't set CDirty here, this is OK because the unlink
175 * RPC is called synchronously */
177 afs_remove(OSI_VC_DECL(adp), char *aname, afs_ucred_t *acred)
179 struct vrequest *treq = NULL;
181 struct VenusFid unlinkFid;
184 afs_size_t offset, len;
185 struct afs_fakestat_state fakestate;
188 AFS_STATCNT(afs_remove);
189 afs_Trace2(afs_iclSetp, CM_TRACE_REMOVE, ICL_TYPE_POINTER, adp,
190 ICL_TYPE_STRING, aname);
193 if ((code = afs_CreateReq(&treq, acred))) {
197 afs_InitFakeStat(&fakestate);
199 code = afs_EvalFakeStat(&adp, &fakestate, treq);
203 /* Check if this is dynroot */
204 if (afs_IsDynroot(adp)) {
205 code = afs_DynrootVOPRemove(adp, acred, aname);
208 if (afs_IsDynrootMount(adp)) {
213 if (strlen(aname) > AFSNAMEMAX) {
218 code = afs_VerifyVCache(adp, treq);
221 code = afs_CheckCode(code, treq, 23);
225 /** If the volume is read-only, return error without making an RPC to the
228 if (adp->f.states & CRO) {
233 /* If we're running disconnected without logging, go no further... */
234 if (AFS_IS_DISCONNECTED && !AFS_IS_DISCON_RW) {
239 tdc = afs_GetDCache(adp, (afs_size_t) 0, treq, &offset, &len, 1); /* test for error below */
240 ObtainWriteLock(&adp->lock, 142);
242 ObtainSharedLock(&tdc->lock, 638);
245 * Make sure that the data in the cache is current. We may have
246 * received a callback while we were waiting for the write lock.
248 if (!(adp->f.states & CStatd)
249 || (tdc && !hsame(adp->f.m.DataVersion, tdc->f.versionNo))) {
250 ReleaseWriteLock(&adp->lock);
252 ReleaseSharedLock(&tdc->lock);
258 unlinkFid.Fid.Vnode = 0;
260 tvc = osi_dnlc_lookup(adp, aname, WRITE_LOCK);
262 /* This should not be necessary since afs_lookup() has already
267 code = afs_dir_Lookup(tdc, aname, &unlinkFid.Fid);
269 afs_int32 cached = 0;
271 unlinkFid.Cell = adp->f.fid.Cell;
272 unlinkFid.Fid.Volume = adp->f.fid.Fid.Volume;
273 if (unlinkFid.Fid.Unique == 0) {
275 afs_LookupVCache(&unlinkFid, treq, &cached, adp,
278 ObtainReadLock(&afs_xvcache);
279 tvc = afs_FindVCache(&unlinkFid, 0, DO_STATS);
280 ReleaseReadLock(&afs_xvcache);
285 if (AFS_IS_DISCON_RW) {
286 if (!adp->f.shadow.vnode && !(adp->f.ddirty_flags & VDisconCreate)) {
287 /* Make shadow copy of parent dir. */
288 afs_MakeShadowDir(adp, tdc);
291 /* Can't hold a dcache lock whilst we're getting a vcache one */
293 ReleaseSharedLock(&tdc->lock);
295 /* XXX - We're holding adp->lock still, and we've got no
296 * guarantee about whether the ordering matches the lock hierarchy */
297 ObtainWriteLock(&tvc->lock, 713);
299 /* If we were locally created, then we don't need to do very
300 * much beyond ensuring that we don't exist anymore */
301 if (tvc->f.ddirty_flags & VDisconCreate) {
302 afs_DisconRemoveDirty(tvc);
304 /* Add removed file vcache to dirty list. */
305 afs_DisconAddDirty(tvc, VDisconRemove, 1);
307 adp->f.m.LinkCount--;
308 ReleaseWriteLock(&tvc->lock);
310 ObtainSharedLock(&tdc->lock, 714);
313 if (tvc && osi_Active(tvc)) {
314 /* about to delete whole file, prefetch it first */
315 ReleaseWriteLock(&adp->lock);
317 ReleaseSharedLock(&tdc->lock);
318 ObtainWriteLock(&tvc->lock, 143);
319 FetchWholeEnchilada(tvc, treq);
320 ReleaseWriteLock(&tvc->lock);
321 ObtainWriteLock(&adp->lock, 144);
322 /* Technically I don't think we need this back, but let's hold it
323 anyway; The "got" reference should actually be sufficient. */
325 ObtainSharedLock(&tdc->lock, 640);
328 osi_dnlc_remove(adp, aname, tvc);
331 #ifndef AFS_DARWIN80_ENV
332 Tadpr = VREFCOUNT(adp);
337 #ifndef AFS_DARWIN80_ENV
339 Ttvcr = VREFCOUNT(tvc);
342 if (tvc && VREFCOUNT_GT(tvc, 2) && tvc->opens > 0
343 && !(tvc->f.states & CUnlinked)) {
345 if (tvc && VREFCOUNT_GT(tvc, 1) && tvc->opens > 0
346 && !(tvc->f.states & CUnlinked)) {
348 char *unlname = afs_newname();
350 ReleaseWriteLock(&adp->lock);
352 ReleaseSharedLock(&tdc->lock);
353 code = afsrename(adp, aname, adp, unlname, acred, treq);
356 struct VenusFid *oldmvid = NULL;
359 tvc->mvid = (struct VenusFid *)unlname;
361 osi_FreeSmallSpace(oldmvid);
367 tvc->f.states |= CUnlinked;
368 /* if rename succeeded, remove should not */
369 ObtainWriteLock(&tvc->lock, 715);
370 if (tvc->f.ddirty_flags & VDisconRemove) {
371 tvc->f.ddirty_flags &= ~VDisconRemove;
373 ReleaseWriteLock(&tvc->lock);
375 osi_FreeSmallSpace(unlname);
381 code = afsremove(adp, tdc, tvc, aname, acred, treq);
384 afs_PutFakeStat(&fakestate);
385 #if !defined(AFS_DARWIN80_ENV) && !defined(UKERNEL)
386 /* we can't track by thread, it's not exported in the KPI; only do
388 osi_Assert(!WriteLocked(&adp->lock) || (adp->lock.pid_writer != MyPidxx));
391 afs_DestroyReq(treq);
396 /* afs_remunlink -- This tries to delete the file at the server after it has
397 * been renamed when unlinked locally but now has been finally released.
399 * CAUTION -- may be called with avc unheld. */
402 afs_remunlink(struct vcache *avc, int doit)
407 struct VenusFid dirFid;
411 if (NBObtainWriteLock(&avc->lock, 423))
413 #if defined(AFS_DARWIN80_ENV)
414 if (vnode_get(AFSTOV(avc))) {
415 ReleaseWriteLock(&avc->lock);
420 if (avc->mvid && (doit || (avc->f.states & CUnlinkedDel))) {
421 struct vrequest *treq = NULL;
423 if ((code = afs_CreateReq(&treq, avc->uncred))) {
424 ReleaseWriteLock(&avc->lock);
426 /* Must bump the refCount because GetVCache may block.
427 * Also clear mvid so no other thread comes here if we block.
429 unlname = (char *)avc->mvid;
434 #if defined(AFS_DARWIN_ENV) && !defined(AFS_DARWIN80_ENV)
440 /* We'll only try this once. If it fails, just release the vnode.
441 * Clear after doing hold so that NewVCache doesn't find us yet.
443 avc->f.states &= ~(CUnlinked | CUnlinkedDel);
445 ReleaseWriteLock(&avc->lock);
447 dirFid.Cell = avc->f.fid.Cell;
448 dirFid.Fid.Volume = avc->f.fid.Fid.Volume;
449 dirFid.Fid.Vnode = avc->f.parent.vnode;
450 dirFid.Fid.Unique = avc->f.parent.unique;
451 adp = afs_GetVCache(&dirFid, treq, NULL, NULL);
454 tdc = afs_FindDCache(adp, (afs_size_t) 0);
455 ObtainWriteLock(&adp->lock, 159);
457 ObtainSharedLock(&tdc->lock, 639);
459 /* afsremove releases the adp & tdc locks, and does vn_rele(avc) */
460 code = afsremove(adp, tdc, avc, unlname, cred, treq);
463 /* we failed - and won't be back to try again. */
466 osi_FreeSmallSpace(unlname);
468 afs_DestroyReq(treq);
471 #if defined(AFS_DARWIN80_ENV)
472 vnode_put(AFSTOV(avc));
474 ReleaseWriteLock(&avc->lock);