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
17 #include <afsconfig.h>
18 #include "afs/param.h"
23 #include "afs/sysincludes.h" /* Standard vendor system headers */
24 #include "afsincludes.h" /* Afs-based standard headers */
25 #include "afs/afs_stats.h" /* statistics */
26 #include "afs/afs_cbqueue.h"
27 #include "afs/nfsclient.h"
28 #include "afs/afs_osidnlc.h"
30 extern afs_rwlock_t afs_xcbhash;
32 /* Note that we don't set CDirty here, this is OK because the rename
33 * RPC is called synchronously. */
36 afsrename(struct vcache *aodp, char *aname1, struct vcache *andp,
37 char *aname2, struct AFS_UCRED *acred, struct vrequest *areq)
39 register struct conn *tc;
40 register afs_int32 code;
42 int oneDir, doLocally;
43 afs_size_t offset, len;
44 struct VenusFid unlinkFid, fileFid;
46 struct dcache *tdc1, *tdc2;
47 struct AFSFetchStatus OutOldDirStatus, OutNewDirStatus;
48 struct AFSVolSync tsync;
49 XSTATS_DECLS AFS_STATCNT(afs_rename);
50 afs_Trace4(afs_iclSetp, CM_TRACE_RENAME, ICL_TYPE_POINTER, aodp,
51 ICL_TYPE_STRING, aname1, ICL_TYPE_POINTER, andp,
52 ICL_TYPE_STRING, aname2);
54 if (strlen(aname1) > AFSNAMEMAX || strlen(aname2) > AFSNAMEMAX) {
59 /* verify the latest versions of the stat cache entries */
61 code = afs_VerifyVCache(aodp, areq);
64 code = afs_VerifyVCache(andp, areq);
68 /* lock in appropriate order, after some checks */
69 if (aodp->fid.Cell != andp->fid.Cell
70 || aodp->fid.Fid.Volume != andp->fid.Fid.Volume) {
76 if (andp->fid.Fid.Vnode == aodp->fid.Fid.Vnode) {
77 if (!strcmp(aname1, aname2)) {
78 /* Same directory and same name; this is a noop and just return success
79 * to save cycles and follow posix standards */
84 ObtainWriteLock(&andp->lock, 147);
85 tdc1 = afs_GetDCache(aodp, (afs_size_t) 0, areq, &offset, &len, 0);
89 ObtainWriteLock(&tdc1->lock, 643);
92 oneDir = 1; /* only one dude locked */
93 } else if ((andp->states & CRO) || (aodp->states & CRO)) {
96 } else if (andp->fid.Fid.Vnode < aodp->fid.Fid.Vnode) {
97 ObtainWriteLock(&andp->lock, 148); /* lock smaller one first */
98 ObtainWriteLock(&aodp->lock, 149);
99 tdc2 = afs_FindDCache(andp, (afs_size_t) 0);
101 ObtainWriteLock(&tdc2->lock, 644);
102 tdc1 = afs_GetDCache(aodp, (afs_size_t) 0, areq, &offset, &len, 0);
104 ObtainWriteLock(&tdc1->lock, 645);
108 ObtainWriteLock(&aodp->lock, 150); /* lock smaller one first */
109 ObtainWriteLock(&andp->lock, 557);
110 tdc1 = afs_GetDCache(aodp, (afs_size_t) 0, areq, &offset, &len, 0);
112 ObtainWriteLock(&tdc1->lock, 646);
115 tdc2 = afs_FindDCache(andp, (afs_size_t) 0);
117 ObtainWriteLock(&tdc2->lock, 647);
120 osi_dnlc_remove(aodp, aname1, 0);
121 osi_dnlc_remove(andp, aname2, 0);
122 afs_symhint_inval(aodp);
123 afs_symhint_inval(andp);
126 * Make sure that the data in the cache is current. We may have
127 * received a callback while we were waiting for the write lock.
130 if (!(aodp->states & CStatd)
131 || !hsame(aodp->m.DataVersion, tdc1->f.versionNo)) {
133 ReleaseWriteLock(&aodp->lock);
136 ReleaseWriteLock(&tdc2->lock);
139 ReleaseWriteLock(&andp->lock);
141 ReleaseWriteLock(&tdc1->lock);
148 code = afs_dir_Lookup(&tdc1->f.inode, aname1, &fileFid.Fid);
151 ReleaseWriteLock(&tdc1->lock);
154 ReleaseWriteLock(&aodp->lock);
157 ReleaseWriteLock(&tdc2->lock);
160 ReleaseWriteLock(&andp->lock);
165 /* locks are now set, proceed to do the real work */
167 tc = afs_Conn(&aodp->fid, areq, SHARED_LOCK);
169 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_RENAME);
172 RXAFS_Rename(tc->id, (struct AFSFid *)&aodp->fid.Fid, aname1,
173 (struct AFSFid *)&andp->fid.Fid, aname2,
174 &OutOldDirStatus, &OutNewDirStatus, &tsync);
181 (tc, code, &andp->fid, areq, AFS_STATS_FS_RPCIDX_RENAME,
184 returnCode = code; /* remember for later */
186 /* Now we try to do things locally. This is really loathsome code. */
187 unlinkFid.Fid.Vnode = 0;
189 /* In any event, we don't really care if the data (tdc2) is not
190 * in the cache; if it isn't, we won't do the update locally. */
191 /* see if version numbers increased properly */
194 /* number increases by 1 for whole rename operation */
195 if (!afs_LocalHero(aodp, tdc1, &OutOldDirStatus, 1)) {
199 /* two separate dirs, each increasing by 1 */
200 if (!afs_LocalHero(aodp, tdc1, &OutOldDirStatus, 1))
202 if (!afs_LocalHero(andp, tdc2, &OutNewDirStatus, 1))
207 DZap(&tdc1->f.inode);
211 DZap(&tdc2->f.inode);
215 /* now really do the work */
217 /* first lookup the fid of the dude we're moving */
218 code = afs_dir_Lookup(&tdc1->f.inode, aname1, &fileFid.Fid);
220 /* delete the source */
221 code = afs_dir_Delete(&tdc1->f.inode, aname1);
223 /* first see if target is there */
225 && afs_dir_Lookup(&tdc2->f.inode, aname2,
226 &unlinkFid.Fid) == 0) {
227 /* target already exists, and will be unlinked by server */
228 code = afs_dir_Delete(&tdc2->f.inode, aname2);
231 code = afs_dir_Create(&tdc2->f.inode, aname2, &fileFid.Fid);
235 DZap(&tdc1->f.inode);
238 DZap(&tdc2->f.inode);
243 /* update dir link counts */
244 aodp->m.LinkCount = OutOldDirStatus.LinkCount;
246 andp->m.LinkCount = OutNewDirStatus.LinkCount;
248 } else { /* operation failed (code != 0) */
250 /* if failed, server might have done something anyway, and
251 * assume that we know about it */
252 ObtainWriteLock(&afs_xcbhash, 498);
253 afs_DequeueCallback(aodp);
254 afs_DequeueCallback(andp);
255 andp->states &= ~CStatd;
256 aodp->states &= ~CStatd;
257 ReleaseWriteLock(&afs_xcbhash);
258 osi_dnlc_purgedp(andp);
259 osi_dnlc_purgedp(aodp);
265 ReleaseWriteLock(&tdc1->lock);
269 if ((!oneDir) && tdc2) {
270 ReleaseWriteLock(&tdc2->lock);
274 ReleaseWriteLock(&aodp->lock);
276 ReleaseWriteLock(&andp->lock);
283 /* now, some more details. if unlinkFid.Fid.Vnode then we should decrement
284 * the link count on this file. Note that if fileFid is a dir, then we don't
285 * have to invalidate its ".." entry, since its DataVersion # should have
286 * changed. However, interface is not good enough to tell us the
287 * *file*'s new DataVersion, so we're stuck. Our hack: delete mark
288 * the data as having an "unknown" version (effectively discarding the ".."
290 if (unlinkFid.Fid.Vnode) {
291 unlinkFid.Fid.Volume = aodp->fid.Fid.Volume;
292 unlinkFid.Cell = aodp->fid.Cell;
294 if (!unlinkFid.Fid.Unique) {
295 tvc = afs_LookupVCache(&unlinkFid, areq, NULL, aodp, aname1);
297 if (!tvc) /* lookup failed or wasn't called */
298 tvc = afs_GetVCache(&unlinkFid, areq, NULL, NULL);
301 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV) || defined(AFS_SUN5_ENV)
302 afs_BozonLock(&tvc->pvnLock, tvc); /* Since afs_TryToSmush will do a pvn_vptrunc */
304 ObtainWriteLock(&tvc->lock, 151);
306 tvc->states &= ~CUnique; /* For the dfs xlator */
307 if (tvc->m.LinkCount == 0 && !osi_Active(tvc)) {
308 /* if this was last guy (probably) discard from cache.
309 * We have to be careful to not get rid of the stat
310 * information, since otherwise operations will start
311 * failing even if the file was still open (or
312 * otherwise active), and the server no longer has the
313 * info. If the file still has valid links, we'll get
314 * a break-callback msg from the server, so it doesn't
315 * matter that we don't discard the status info */
316 if (!AFS_NFSXLATORREQ(acred))
317 afs_TryToSmush(tvc, acred, 0);
319 ReleaseWriteLock(&tvc->lock);
320 #if defined(AFS_SUN_ENV) || defined(AFS_ALPHA_ENV) || defined(AFS_SUN5_ENV)
321 afs_BozonUnlock(&tvc->pvnLock, tvc);
327 /* now handle ".." invalidation */
329 fileFid.Fid.Volume = aodp->fid.Fid.Volume;
330 fileFid.Cell = aodp->fid.Cell;
331 if (!fileFid.Fid.Unique)
332 tvc = afs_LookupVCache(&fileFid, areq, NULL, andp, aname2);
334 tvc = afs_GetVCache(&fileFid, areq, NULL, (struct vcache *)0);
335 if (tvc && (vType(tvc) == VDIR)) {
336 ObtainWriteLock(&tvc->lock, 152);
337 tdc1 = afs_FindDCache(tvc, (afs_size_t) 0);
339 ObtainWriteLock(&tdc1->lock, 648);
340 ZapDCE(tdc1); /* mark as unknown */
341 DZap(&tdc1->f.inode);
342 ReleaseWriteLock(&tdc1->lock);
343 afs_PutDCache(tdc1); /* put it back */
345 osi_dnlc_remove(tvc, "..", 0);
346 ReleaseWriteLock(&tvc->lock);
349 /* True we shouldn't come here since tvc SHOULD be a dir, but we
350 * 'syntactically' need to unless we change the 'if' above...
361 afs_rename(fndp, tndp)
362 struct nameidata *fndp, *tndp;
364 struct vcache *aodp = VTOAFS(fndp->ni_dvp);
365 char *aname1 = fndp->ni_dent.d_name;
366 struct vcache *andp = VTOAFS(tndp->ni_dvp);
367 char *aname2 = tndp->ni_dent.d_name;
368 struct ucred *acred = tndp->ni_cred;
369 #else /* AFS_OSF_ENV */
370 #if defined(AFS_SGI_ENV)
371 afs_rename(OSI_VC_ARG(aodp), aname1, andp, aname2, npnp, acred)
372 struct pathname *npnp;
374 afs_rename(OSI_VC_ARG(aodp), aname1, andp, aname2, acred)
378 char *aname1, *aname2;
379 struct AFS_UCRED *acred;
382 register afs_int32 code;
383 struct afs_fakestat_state ofakestate;
384 struct afs_fakestat_state nfakestate;
385 struct vrequest treq;
388 code = afs_InitReq(&treq, acred);
391 afs_InitFakeStat(&ofakestate);
392 afs_InitFakeStat(&nfakestate);
393 code = afs_EvalFakeStat(&aodp, &ofakestate, &treq);
396 code = afs_EvalFakeStat(&andp, &nfakestate, &treq);
399 code = afsrename(aodp, aname1, andp, aname2, acred, &treq);
401 afs_PutFakeStat(&ofakestate);
402 afs_PutFakeStat(&nfakestate);
404 AFS_RELE(tndp->ni_dvp);
405 if (tndp->ni_vp != NULL) {
406 AFS_RELE(tndp->ni_vp);
408 AFS_RELE(fndp->ni_dvp);
409 AFS_RELE(fndp->ni_vp);
410 #endif /* AFS_OSF_ENV */
411 code = afs_CheckCode(code, &treq, 25);