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(register struct vcache *avc, struct vrequest *areq)
37 register afs_int32 nextChunk;
38 register struct dcache *tdc;
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(register struct vcache *adp, register struct dcache *tdc,
57 register struct vcache *tvc, char *aname, afs_ucred_t *acred,
58 struct vrequest *treqp)
60 register afs_int32 code = 0;
61 register struct afs_conn *tc;
62 struct AFSFetchStatus OutDirStatus;
63 struct AFSVolSync tsync;
65 if (!AFS_IS_DISCONNECTED) {
67 tc = afs_Conn(&adp->f.fid, treqp, SHARED_LOCK);
69 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_REMOVEFILE);
72 RXAFS_RemoveFile(tc->id, (struct AFSFid *)&adp->f.fid.Fid,
73 aname, &OutDirStatus, &tsync);
79 (tc, code, &adp->f.fid, treqp, AFS_STATS_FS_RPCIDX_REMOVEFILE,
83 osi_dnlc_remove(adp, aname, tvc);
87 ReleaseSharedLock(&tdc->lock);
95 ObtainWriteLock(&afs_xcbhash, 497);
96 afs_DequeueCallback(adp);
97 adp->f.states &= ~CStatd;
98 ReleaseWriteLock(&afs_xcbhash);
99 osi_dnlc_purgedp(adp);
101 ReleaseWriteLock(&adp->lock);
102 code = afs_CheckCode(code, treqp, 21);
106 UpgradeSToWLock(&tdc->lock, 637);
107 if (AFS_IS_DISCON_RW || afs_LocalHero(adp, tdc, &OutDirStatus, 1)) {
108 /* we can do it locally */
109 code = afs_dir_Delete(tdc, aname);
111 ZapDCE(tdc); /* surprise error -- invalid value */
116 ReleaseWriteLock(&tdc->lock);
117 afs_PutDCache(tdc); /* drop ref count */
119 ReleaseWriteLock(&adp->lock);
121 /* now, get vnode for unlinked dude, and see if we should force it
122 * from cache. adp is now the deleted files vnode. Note that we
123 * call FindVCache instead of GetVCache since if the file's really
124 * gone, we won't be able to fetch the status info anyway. */
126 #ifdef AFS_BOZONLOCK_ENV
127 afs_BozonLock(&tvc->pvnLock, tvc);
128 /* Since afs_TryToSmush will do a pvn_vptrunc */
130 ObtainWriteLock(&tvc->lock, 141);
131 /* note that callback will be broken on the deleted file if there are
132 * still >0 links left to it, so we'll get the stat right */
133 tvc->f.m.LinkCount--;
134 tvc->f.states &= ~CUnique; /* For the dfs xlator */
135 if (tvc->f.m.LinkCount == 0 && !osi_Active(tvc)) {
136 if (!AFS_NFSXLATORREQ(acred))
137 afs_TryToSmush(tvc, acred, 0);
139 ReleaseWriteLock(&tvc->lock);
140 #ifdef AFS_BOZONLOCK_ENV
141 afs_BozonUnlock(&tvc->pvnLock, tvc);
151 char *name, *sp, *p = ".__afs";
152 afs_int32 rd = afs_random() & 0xffff;
154 sp = name = osi_AllocSmallSpace(AFS_SMALLOCSIZ);
158 *sp++ = "0123456789ABCDEF"[rd & 0x0f];
165 /* these variables appear to exist for debugging purposes */
166 struct vcache *Tadp1, *Ttvc;
171 /* Note that we don't set CDirty here, this is OK because the unlink
172 * RPC is called synchronously */
174 afs_remove(OSI_VC_DECL(adp), char *aname, afs_ucred_t *acred)
176 struct vrequest treq;
177 register struct dcache *tdc;
178 struct VenusFid unlinkFid;
179 register afs_int32 code;
180 register struct vcache *tvc;
181 afs_size_t offset, len;
182 struct afs_fakestat_state fakestate;
185 AFS_STATCNT(afs_remove);
186 afs_Trace2(afs_iclSetp, CM_TRACE_REMOVE, ICL_TYPE_POINTER, adp,
187 ICL_TYPE_STRING, aname);
190 if ((code = afs_InitReq(&treq, acred))) {
194 afs_InitFakeStat(&fakestate);
195 code = afs_EvalFakeStat(&adp, &fakestate, &treq);
197 afs_PutFakeStat(&fakestate);
201 /* Check if this is dynroot */
202 if (afs_IsDynroot(adp)) {
203 code = afs_DynrootVOPRemove(adp, acred, aname);
204 afs_PutFakeStat(&fakestate);
207 if (afs_IsDynrootMount(adp)) {
211 if (strlen(aname) > AFSNAMEMAX) {
212 afs_PutFakeStat(&fakestate);
216 code = afs_VerifyVCache(adp, &treq);
219 code = afs_CheckCode(code, &treq, 23);
220 afs_PutFakeStat(&fakestate);
224 /** If the volume is read-only, return error without making an RPC to the
227 if (adp->f.states & CRO) {
229 afs_PutFakeStat(&fakestate);
233 /* If we're running disconnected without logging, go no further... */
234 if (AFS_IS_DISCONNECTED && !AFS_IS_DISCON_RW) {
236 afs_PutFakeStat(&fakestate);
240 tdc = afs_GetDCache(adp, (afs_size_t) 0, &treq, &offset, &len, 1); /* test for error below */
241 ObtainWriteLock(&adp->lock, 142);
243 ObtainSharedLock(&tdc->lock, 638);
246 * Make sure that the data in the cache is current. We may have
247 * received a callback while we were waiting for the write lock.
249 if (!(adp->f.states & CStatd)
250 || (tdc && !hsame(adp->f.m.DataVersion, tdc->f.versionNo))) {
251 ReleaseWriteLock(&adp->lock);
253 ReleaseSharedLock(&tdc->lock);
259 unlinkFid.Fid.Vnode = 0;
261 tvc = osi_dnlc_lookup(adp, aname, WRITE_LOCK);
263 /* This should not be necessary since afs_lookup() has already
268 code = afs_dir_Lookup(tdc, aname, &unlinkFid.Fid);
270 afs_int32 cached = 0;
272 unlinkFid.Cell = adp->f.fid.Cell;
273 unlinkFid.Fid.Volume = adp->f.fid.Fid.Volume;
274 if (unlinkFid.Fid.Unique == 0) {
276 afs_LookupVCache(&unlinkFid, &treq, &cached, adp,
279 ObtainReadLock(&afs_xvcache);
280 tvc = afs_FindVCache(&unlinkFid, 0, DO_STATS);
281 ReleaseReadLock(&afs_xvcache);
286 #if defined(AFS_DISCON_ENV)
287 if (AFS_IS_DISCON_RW) {
288 if (!adp->f.shadow.vnode && !(adp->f.ddirty_flags & VDisconCreate)) {
289 /* Make shadow copy of parent dir. */
290 afs_MakeShadowDir(adp, tdc);
293 /* Can't hold a dcache lock whilst we're getting a vcache one */
295 ReleaseSharedLock(&tdc->lock);
297 /* XXX - We're holding adp->lock still, and we've got no
298 * guarantee about whether the ordering matches the lock hierarchy */
299 ObtainWriteLock(&tvc->lock, 713);
301 /* If we were locally created, then we don't need to do very
302 * much beyond ensuring that we don't exist anymore */
303 if (tvc->f.ddirty_flags & VDisconCreate) {
304 afs_DisconRemoveDirty(tvc);
306 /* Add removed file vcache to dirty list. */
307 afs_DisconAddDirty(tvc, VDisconRemove, 1);
309 adp->f.m.LinkCount--;
310 ReleaseWriteLock(&tvc->lock);
312 ObtainSharedLock(&tdc->lock, 714);
316 if (tvc && osi_Active(tvc)) {
317 /* about to delete whole file, prefetch it first */
318 ReleaseWriteLock(&adp->lock);
320 ReleaseSharedLock(&tdc->lock);
321 ObtainWriteLock(&tvc->lock, 143);
322 FetchWholeEnchilada(tvc, &treq);
323 ReleaseWriteLock(&tvc->lock);
324 ObtainWriteLock(&adp->lock, 144);
325 /* Technically I don't think we need this back, but let's hold it
326 anyway; The "got" reference should actually be sufficient. */
328 ObtainSharedLock(&tdc->lock, 640);
331 osi_dnlc_remove(adp, aname, tvc);
334 #ifndef AFS_DARWIN80_ENV
335 Tadpr = VREFCOUNT(adp);
340 #ifndef AFS_DARWIN80_ENV
342 Ttvcr = VREFCOUNT(tvc);
345 if (tvc && VREFCOUNT_GT(tvc, 2) && tvc->opens > 0
346 && !(tvc->f.states & CUnlinked)) {
348 if (tvc && VREFCOUNT_GT(tvc, 1) && tvc->opens > 0
349 && !(tvc->f.states & CUnlinked)) {
351 char *unlname = afs_newname();
353 ReleaseWriteLock(&adp->lock);
355 ReleaseSharedLock(&tdc->lock);
356 code = afsrename(adp, aname, adp, unlname, acred, &treq);
359 struct VenusFid *oldmvid = NULL;
362 tvc->mvid = (struct VenusFid *)unlname;
364 osi_FreeSmallSpace(oldmvid);
370 tvc->f.states |= CUnlinked;
371 #if defined(AFS_DISCON_ENV)
372 /* if rename succeeded, remove should not */
373 ObtainWriteLock(&tvc->lock, 715);
374 if (tvc->f.ddirty_flags & VDisconRemove) {
375 tvc->f.ddirty_flags &= ~VDisconRemove;
377 ReleaseWriteLock(&tvc->lock);
380 osi_FreeSmallSpace(unlname);
386 code = afsremove(adp, tdc, tvc, aname, acred, &treq);
388 afs_PutFakeStat(&fakestate);
389 #ifndef AFS_DARWIN80_ENV
390 /* we can't track by thread, it's not exported in the KPI; only do
392 osi_Assert(!WriteLocked(&adp->lock) || (adp->lock.pid_writer != MyPidxx));
398 /* afs_remunlink -- This tries to delete the file at the server after it has
399 * been renamed when unlinked locally but now has been finally released.
401 * CAUTION -- may be called with avc unheld. */
404 afs_remunlink(register struct vcache *avc, register int doit)
409 struct vrequest treq;
410 struct VenusFid dirFid;
411 register struct dcache *tdc;
414 if (NBObtainWriteLock(&avc->lock, 423))
416 #if defined(AFS_DARWIN80_ENV)
417 if (vnode_get(AFSTOV(avc))) {
418 ReleaseWriteLock(&avc->lock);
423 if (avc->mvid && (doit || (avc->f.states & CUnlinkedDel))) {
424 if ((code = afs_InitReq(&treq, avc->uncred))) {
425 ReleaseWriteLock(&avc->lock);
427 /* Must bump the refCount because GetVCache may block.
428 * Also clear mvid so no other thread comes here if we block.
430 unlname = (char *)avc->mvid;
435 #if defined(AFS_DARWIN_ENV) && !defined(AFS_DARWIN80_ENV)
438 VN_HOLD(AFSTOV(avc));
441 /* We'll only try this once. If it fails, just release the vnode.
442 * Clear after doing hold so that NewVCache doesn't find us yet.
444 avc->f.states &= ~(CUnlinked | CUnlinkedDel);
446 ReleaseWriteLock(&avc->lock);
448 dirFid.Cell = avc->f.fid.Cell;
449 dirFid.Fid.Volume = avc->f.fid.Fid.Volume;
450 dirFid.Fid.Vnode = avc->f.parent.vnode;
451 dirFid.Fid.Unique = avc->f.parent.unique;
452 adp = afs_GetVCache(&dirFid, &treq, NULL, NULL);
455 tdc = afs_FindDCache(adp, (afs_size_t) 0);
456 ObtainWriteLock(&adp->lock, 159);
458 ObtainSharedLock(&tdc->lock, 639);
460 /* afsremove releases the adp & tdc locks, and does vn_rele(avc) */
461 code = afsremove(adp, tdc, avc, unlname, cred, &treq);
464 /* we failed - and won't be back to try again. */
467 osi_FreeSmallSpace(unlname);
471 #if defined(AFS_DARWIN80_ENV)
472 vnode_put(AFSTOV(avc));
474 ReleaseWriteLock(&avc->lock);