2 * This software has been released under the terms of the IBM Public
3 * License. For details, see the LICENSE file in the top-level source
4 * directory or online at http://www.openafs.org/dl/license10.html
11 #include "afs/sysincludes.h"
12 #include "afsincludes.h"
13 #include "afs/afs_stats.h" /* statistics */
15 #include "afs/afs_cbqueue.h"
17 #define dv_match(vc, fstat) \
18 ((vc->f.m.DataVersion.low == fstat.DataVersion) && \
19 (vc->f.m.DataVersion.high == fstat.dataVersionHigh))
21 /*! Circular queue of dirty vcaches */
22 struct afs_q afs_disconDirty;
24 /*! Circular queue of vcaches with shadow directories */
25 struct afs_q afs_disconShadow;
27 /*! Locks both of these lists. Must be write locked for anything other than
29 afs_rwlock_t afs_disconDirtyLock;
31 extern afs_int32 *afs_dvhashTbl; /*Data cache hash table */
32 extern afs_int32 *afs_dchashTbl; /*Data cache hash table */
33 extern afs_int32 *afs_dvnextTbl; /*Dcache hash table links */
34 extern afs_int32 *afs_dcnextTbl; /*Dcache hash table links */
35 extern struct dcache **afs_indexTable; /*Pointers to dcache entries */
37 /*! Vnode number. On file creation, use the current value and increment it.
39 afs_uint32 afs_DisconVnode = 2;
41 /*! Conflict policy. */
49 afs_int32 afs_ConflictPolicy = SERVER_WINS;
51 static void afs_DisconDiscardAllShadows(int, afs_ucred_t *);
52 void afs_DbgListDirEntries(struct VenusFid *afid);
56 * Find the first dcache of a file that has the specified fid.
57 * Similar to afs_FindDCache, only that it takes a fid instead
58 * of a vcache and it can get the first dcache.
62 * \return The found dcache or NULL.
65 afs_FindDCacheByFid(struct VenusFid *afid)
68 struct dcache *tdc = NULL;
71 ObtainWriteLock(&afs_xdcache, 758);
72 for (index = afs_dvhashTbl[i]; index != NULLIDX;) {
73 if (afs_indexUnique[index] == afid->Fid.Unique) {
74 tdc = afs_GetDSlot(index, NULL);
75 ReleaseReadLock(&tdc->tlock);
76 if (!FidCmp(&tdc->f.fid, afid)) {
77 break; /* leaving refCount high for caller */
81 index = afs_dvnextTbl[index];
83 ReleaseWriteLock(&afs_xdcache);
91 * Generate a store status from a dirty vcache entry.
93 * \param avc Dirty vcache entry.
96 * \note The vnode must be share locked. It is called only on resync,
97 * where the vnode is write locked locally and and the server.
99 * \return Mask of operations.
102 afs_GenStoreStatus(struct vcache *avc, struct AFSStoreStatus *astat)
104 if (!avc || !astat || !avc->f.ddirty_flags)
107 /* Clean up store stat. */
108 memset(astat, 0, sizeof(struct AFSStoreStatus));
110 if (avc->f.ddirty_flags & VDisconSetTime) {
111 /* Update timestamp. */
112 astat->ClientModTime = avc->f.m.Date;
113 astat->Mask |= AFS_SETMODTIME;
116 if (avc->f.ddirty_flags & VDisconSetMode) {
117 /* Copy the mode bits. */
118 astat->UnixModeBits = avc->f.m.Mode;
119 astat->Mask |= AFS_SETMODE;
122 /* XXX: more to come... ?*/
128 * Hook for filtering the local dir fid by searching the "." entry.
130 * \param hdata The fid to be filled.
133 get_parent_dir_fid_hook(void *hdata, char *aname, afs_int32 vnode,
136 struct VenusFid *tfid = (struct VenusFid *) hdata;
138 if ((aname[0] == '.') && (aname[1] == '.') && !aname[2]) {
139 tfid->Fid.Vnode = vnode;
140 tfid->Fid.Unique = unique;
148 * Get a the dir's fid by looking in the vcache for simple files and
149 * in the ".." entry for directories.
151 * \param avc The file's vhash entry.
152 * \param afid Put the fid here.
154 * \return 0 on success, -1 on failure
157 afs_GetParentDirFid(struct vcache *avc, struct VenusFid *afid)
161 afid->Cell = avc->f.fid.Cell;
162 afid->Fid.Volume = avc->f.fid.Fid.Volume;
164 switch (vType(avc)) {
167 /* Normal files have the dir fid embedded in the vcache. */
168 afid->Fid.Vnode = avc->f.parent.vnode;
169 afid->Fid.Unique = avc->f.parent.unique;
172 /* If dir or parent dir created locally*/
173 tdc = afs_FindDCacheByFid(&avc->f.fid);
175 afid->Fid.Unique = 0;
176 /* Lookup each entry for the fid. It should be the first. */
177 afs_dir_EnumerateDir(tdc, &get_parent_dir_fid_hook, afid);
179 if (afid->Fid.Unique == 0) {
195 struct VenusFid *fid;
201 * Hook that searches a certain fid's name.
203 * \param hdata NameAndFid structure containin a pointer to a fid
204 * and an allocate name. The name will be filled when hit.
207 get_vnode_name_hook(void *hdata, char *aname, afs_int32 vnode,
210 struct NameAndFid *nf = (struct NameAndFid *) hdata;
212 if ((nf->fid->Fid.Vnode == vnode) &&
213 (nf->fid->Fid.Unique == unique)) {
214 nf->name_len = strlen(aname);
215 memcpy(nf->name, aname, nf->name_len);
216 nf->name[nf->name_len] = 0;
225 * Try to get a vnode's name by comparing all parent dir's entries
226 * to the given fid. It can also return the dir's dcache.
228 * \param avc The file's vcache.
229 * \param afid The parent dir's fid.
230 * \param aname A preallocated string for the name.
231 * \param deleted Has this file been deleted? If yes, use the shadow
232 * dir for looking up the name.
235 afs_GetVnodeName(struct vcache *avc, struct VenusFid *afid, char *aname,
240 struct vcache *parent_vc;
241 struct NameAndFid tnf;
242 struct VenusFid parent_fid;
243 struct VenusFid shadow_fid;
245 /* List dir contents and get it's tdc. */
247 /* For deleted files, get the shadow dir's tdc: */
249 /* Get the parent dir's vcache that contains the shadow fid. */
250 parent_fid.Cell = avc->f.fid.Cell;
251 parent_fid.Fid.Volume = avc->f.fid.Fid.Volume;
252 if (avc->f.ddirty_flags & VDisconRename) {
253 /* For renames the old dir fid is needed. */
254 parent_fid.Fid.Vnode = avc->f.oldParent.vnode;
255 parent_fid.Fid.Unique = avc->f.oldParent.unique;
257 parent_fid.Fid.Vnode = afid->Fid.Vnode;
258 parent_fid.Fid.Unique = afid->Fid.Unique;
261 /* Get the parent dir's vcache that contains the shadow fid. */
262 ObtainSharedLock(&afs_xvcache, 755);
263 parent_vc = afs_FindVCache(&parent_fid, 0, 1);
264 ReleaseSharedLock(&afs_xvcache);
269 shadow_fid.Cell = parent_vc->f.fid.Cell;
270 shadow_fid.Fid.Volume = parent_vc->f.fid.Fid.Volume;
271 shadow_fid.Fid.Vnode = parent_vc->f.shadow.vnode;
272 shadow_fid.Fid.Unique = parent_vc->f.shadow.unique;
274 afs_PutVCache(parent_vc);
276 /* Get shadow dir's dcache. */
277 tdc = afs_FindDCacheByFid(&shadow_fid);
281 /* For normal files, look into the current dir's entry. */
282 tdc = afs_FindDCacheByFid(afid);
286 tnf.fid = &avc->f.fid;
289 afs_dir_EnumerateDir(tdc, &get_vnode_name_hook, &tnf);
291 if (tnf.name_len == -1)
294 /* printf("Directory dcache not found!\n"); */
301 struct DirtyChildrenCount {
307 * Lookup dirty deleted vnodes in this dir.
310 chk_del_children_hook(void *hdata, char *aname, afs_int32 vnode,
313 struct VenusFid tfid;
314 struct DirtyChildrenCount *v = (struct DirtyChildrenCount *) hdata;
317 if ((aname[0] == '.') && !aname[1])
318 /* Skip processing this dir again.
319 * It would result in an endless loop.
323 if ((aname[0] == '.') && (aname[1] == '.') && !aname[2])
324 /* Don't process parent dir. */
327 /* Get this file's vcache. */
328 tfid.Cell = v->vc->f.fid.Cell;
329 tfid.Fid.Volume = v->vc->f.fid.Fid.Volume;
330 tfid.Fid.Vnode = vnode;
331 tfid.Fid.Unique = unique;
333 ObtainSharedLock(&afs_xvcache, 757);
334 tvc = afs_FindVCache(&tfid, 0, 1);
335 ReleaseSharedLock(&afs_xvcache);
337 /* Count unfinished dirty children. */
339 ObtainReadLock(&tvc->lock);
340 if (tvc->f.ddirty_flags)
342 ReleaseReadLock(&tvc->lock);
351 * Check if entries have been deleted in a vnode's shadow
354 * \return Returns the number of dirty children.
356 * \note afs_DDirtyVCListLock must be write locked.
359 afs_CheckDeletedChildren(struct vcache *avc)
362 struct DirtyChildrenCount dcc;
363 struct VenusFid shadow_fid;
365 if (!avc->f.shadow.vnode)
369 shadow_fid.Cell = avc->f.fid.Cell;
370 shadow_fid.Fid.Volume = avc->f.fid.Fid.Volume;
371 shadow_fid.Fid.Vnode = avc->f.shadow.vnode;
372 shadow_fid.Fid.Unique = avc->f.shadow.unique;
376 /* Get shadow dir's dcache. */
377 tdc = afs_FindDCacheByFid(&shadow_fid);
380 afs_dir_EnumerateDir(tdc, &chk_del_children_hook, &dcc);
388 * Changes a file's parent fid references.
391 fix_children_fids_hook(void *hdata, char *aname, afs_int32 vnode,
394 struct VenusFid tfid;
395 struct VenusFid *afid = (struct VenusFid *) hdata;
397 struct dcache *tdc = NULL;
399 if ((aname[0] == '.') && !aname[1])
402 if ((aname[0] == '.') && (aname[1] == '.') && !aname[2])
405 tfid.Cell = afid->Cell;
406 tfid.Fid.Volume = afid->Fid.Volume;
407 tfid.Fid.Vnode = vnode;
408 tfid.Fid.Unique = unique;
411 /* vnode's parity indicates that it's a file. */
413 /* Get the vcache. */
414 ObtainSharedLock(&afs_xvcache, 759);
415 tvc = afs_FindVCache(&tfid, 0, 1);
416 ReleaseSharedLock(&afs_xvcache);
418 /* Change the fields. */
420 tvc->f.parent.vnode = afid->Fid.Vnode;
421 tvc->f.parent.unique = afid->Fid.Unique;
426 /* It's a dir. Fix this dir's .. entry to contain the new fid. */
427 /* Seek the dir's dcache. */
428 tdc = afs_FindDCacheByFid(&tfid);
430 /* Change the .. entry fid. */
431 afs_dir_ChangeFid(tdc, "..", NULL, &afid->Fid.Vnode);
434 } /* if (!(vnode % 2))*/
440 * Fixes the parentVnode and parentUnique fields of all
441 * files (not dirs) contained in the directory pointed by
442 * old_fid. This is useful on resync, when a locally created dir
443 * get's a new fid and all the children references must be updated
444 * to reflect the new fid.
446 * \note The dir's fid hasn't been changed yet, it is still referenced
449 * \param old_fid The current dir's fid.
450 * \param new_fid The new dir's fid.
453 afs_FixChildrenFids(struct VenusFid *old_fid, struct VenusFid *new_fid)
457 /* Get shadow dir's dcache. */
458 tdc = afs_FindDCacheByFid(old_fid);
459 /* Change the fids. */
461 afs_dir_EnumerateDir(tdc, &fix_children_fids_hook, new_fid);
467 list_dir_hook(void *hdata, char *aname, afs_int32 vnode, afs_int32 unique)
469 /* printf("list_dir_hook: %s v:%u u:%u\n", aname, vnode, unique); */
474 afs_DbgListDirEntries(struct VenusFid *afid)
478 /* Get shadow dir's dcache. */
479 tdc = afs_FindDCacheByFid(afid);
481 afs_dir_EnumerateDir(tdc, &list_dir_hook, NULL);
487 * Find the parent vcache for a given child
489 * \param avc The vcache whose parent is required
490 * \param afid Fid structure in which parent's fid should be stored
491 * \param aname An AFSNAMEMAX sized buffer to hold the parents name
492 * \param adp A pointer to a struct vcache* which will be set to the
495 * \return An error code. 0 indicates success, EAGAIN that the vnode should
496 * be deferred to later in the resync process
500 afs_GetParentVCache(struct vcache *avc, int deleted, struct VenusFid *afid,
501 char *aname, struct vcache **adp)
507 if (afs_GetParentDirFid(avc, afid)) {
508 /* printf("afs_GetParentVCache: Couldn't find parent dir's FID.\n"); */
512 code = afs_GetVnodeName(avc, afid, aname, deleted);
514 /* printf("afs_GetParentVCache: Couldn't find file name\n"); */
518 ObtainSharedLock(&afs_xvcache, 766);
519 *adp = afs_FindVCache(afid, 0, 1);
520 ReleaseSharedLock(&afs_xvcache);
522 /* printf("afs_GetParentVCache: Couldn't find parent dir's vcache\n"); */
527 if ((*adp)->f.ddirty_flags & VDisconCreate) {
528 /* printf("afs_GetParentVCache: deferring until parent exists\n"); */
543 * Handles file renaming on reconnection:
544 * - Get the old name from the old dir's shadow dir.
545 * - Get the new name from the current dir.
546 * - Old dir fid and new dir fid are collected along the way.
549 afs_ProcessOpRename(struct vcache *avc, struct vrequest *areq)
551 struct VenusFid old_pdir_fid, new_pdir_fid;
552 char *old_name = NULL, *new_name = NULL;
553 struct AFSFetchStatus OutOldDirStatus, OutNewDirStatus;
554 struct AFSVolSync tsync;
559 /* Get old dir vcache. */
560 old_pdir_fid.Cell = avc->f.fid.Cell;
561 old_pdir_fid.Fid.Volume = avc->f.fid.Fid.Volume;
562 old_pdir_fid.Fid.Vnode = avc->f.oldParent.vnode;
563 old_pdir_fid.Fid.Unique = avc->f.oldParent.unique;
566 old_name = (char *) afs_osi_Alloc(AFSNAMEMAX);
568 /* printf("afs_ProcessOpRename: Couldn't alloc space for old name.\n"); */
571 code = afs_GetVnodeName(avc, &old_pdir_fid, old_name, 1);
573 /* printf("afs_ProcessOpRename: Couldn't find old name.\n"); */
577 /* Alloc data first. */
578 new_name = (char *) afs_osi_Alloc(AFSNAMEMAX);
580 /* printf("afs_ProcessOpRename: Couldn't alloc space for new name.\n"); */
585 if (avc->f.ddirty_flags & VDisconRenameSameDir) {
586 /* If we're in the same dir, don't do the lookups all over again,
587 * just copy fid and vcache from the old dir.
589 memcpy(&new_pdir_fid, &old_pdir_fid, sizeof(struct VenusFid));
591 /* Get parent dir's FID.*/
592 if (afs_GetParentDirFid(avc, &new_pdir_fid)) {
593 /* printf("afs_ProcessOpRename: Couldn't find new parent dir FID.\n"); */
599 /* And finally get the new name. */
600 code = afs_GetVnodeName(avc, &new_pdir_fid, new_name, 0);
602 /* printf("afs_ProcessOpRename: Couldn't find new name.\n"); */
606 /* Send to data to server. */
608 tc = afs_Conn(&old_pdir_fid, areq, SHARED_LOCK);
610 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_RENAME);
612 code = RXAFS_Rename(tc->id,
613 (struct AFSFid *)&old_pdir_fid.Fid,
615 (struct AFSFid *)&new_pdir_fid.Fid,
625 } while (afs_Analyze(tc,
629 AFS_STATS_FS_RPCIDX_RENAME,
633 /* if (code) printf("afs_ProcessOpRename: server code=%u\n", code); */
636 afs_osi_Free(new_name, AFSNAMEMAX);
638 afs_osi_Free(old_name, AFSNAMEMAX);
643 * Handles all the reconnection details:
644 * - Get all the details about the vnode: name, fid, and parent dir fid.
645 * - Send data to server.
647 * - Reorder vhash and dcaches in their hashes, using the newly acquired fid.
650 afs_ProcessOpCreate(struct vcache *avc, struct vrequest *areq,
653 char *tname = NULL, *ttargetName = NULL;
654 struct AFSStoreStatus InStatus;
655 struct AFSFetchStatus OutFidStatus, OutDirStatus;
656 struct VenusFid pdir_fid, newFid;
657 struct AFSCallBack CallBack;
658 struct AFSVolSync tsync;
659 struct vcache *tdp = NULL, *tvc = NULL;
660 struct dcache *tdc = NULL;
662 afs_int32 hash, new_hash, index;
667 tname = afs_osi_Alloc(AFSNAMEMAX);
671 code = afs_GetParentVCache(avc, 0, &pdir_fid, tname, &tdp);
675 /* This data may also be in linkData, but then we have to deal with
676 * the joy of terminating NULLs and . and file modes. So just get
677 * it from the dcache where it won't have been fiddled with.
679 if (vType(avc) == VLNK) {
682 struct osi_file *tfile;
684 tdc = afs_GetDCache(avc, 0, areq, &offset, &tlen, 0);
696 tlen++; /* space for NULL */
697 ttargetName = afs_osi_Alloc(tlen);
702 ObtainReadLock(&tdc->lock);
703 tfile = afs_CFileOpen(&tdc->f.inode);
704 code = afs_CFileRead(tfile, 0, ttargetName, tlen);
705 ttargetName[tlen-1] = '\0';
706 afs_CFileClose(tfile);
707 ReleaseReadLock(&tdc->lock);
712 InStatus.Mask = AFS_SETMODTIME | AFS_SETMODE | AFS_SETGROUP;
713 InStatus.ClientModTime = avc->f.m.Date;
714 InStatus.Owner = avc->f.m.Owner;
715 InStatus.Group = (afs_int32) afs_cr_gid(acred);
716 /* Only care about protection bits. */
717 InStatus.UnixModeBits = avc->f.m.Mode & 0xffff;
720 tc = afs_Conn(&tdp->f.fid, areq, SHARED_LOCK);
722 switch (vType(avc)) {
724 /* Make file on server. */
725 op = AFS_STATS_FS_RPCIDX_CREATEFILE;
726 XSTATS_START_TIME(op);
728 code = RXAFS_CreateFile(tc->id,
729 (struct AFSFid *)&tdp->f.fid.Fid,
731 (struct AFSFid *) &newFid.Fid,
732 &OutFidStatus, &OutDirStatus,
738 /* Make dir on server. */
739 op = AFS_STATS_FS_RPCIDX_MAKEDIR;
740 XSTATS_START_TIME(op);
742 code = RXAFS_MakeDir(tc->id, (struct AFSFid *) &tdp->f.fid.Fid,
744 (struct AFSFid *) &newFid.Fid,
745 &OutFidStatus, &OutDirStatus,
751 /* Make symlink on server. */
752 op = AFS_STATS_FS_RPCIDX_SYMLINK;
753 XSTATS_START_TIME(op);
755 code = RXAFS_Symlink(tc->id,
756 (struct AFSFid *) &tdp->f.fid.Fid,
757 tname, ttargetName, &InStatus,
758 (struct AFSFid *) &newFid.Fid,
759 &OutFidStatus, &OutDirStatus, &tsync);
764 op = AFS_STATS_FS_RPCIDX_CREATEFILE;
770 } while (afs_Analyze(tc, code, &tdp->f.fid, areq, op, SHARED_LOCK, NULL));
772 /* TODO: Handle errors. */
774 /* printf("afs_ProcessOpCreate: error while creating vnode on server, code=%d .\n", code); */
778 /* The rpc doesn't set the cell number. */
779 newFid.Cell = avc->f.fid.Cell;
782 * Change the fid in the dir entry.
785 /* Seek the dir's dcache. */
786 tdc = afs_FindDCacheByFid(&tdp->f.fid);
788 /* And now change the fid in the parent dir entry. */
789 afs_dir_ChangeFid(tdc, tname, &avc->f.fid.Fid.Vnode, &newFid.Fid.Vnode);
793 if (vType(avc) == VDIR) {
794 /* Change fid in the dir for the "." entry. ".." has alredy been
795 * handled by afs_FixChildrenFids when processing the parent dir.
797 tdc = afs_FindDCacheByFid(&avc->f.fid);
799 afs_dir_ChangeFid(tdc, ".", &avc->f.fid.Fid.Vnode,
802 if (avc->f.m.LinkCount >= 2)
803 /* For non empty dirs, fix children's parentVnode and
804 * parentUnique reference.
806 afs_FixChildrenFids(&avc->f.fid, &newFid);
812 /* Recompute hash chain positions for vnode and dcaches.
813 * Then change to the new FID.
816 /* The vcache goes first. */
817 ObtainWriteLock(&afs_xvcache, 735);
820 hash = VCHash(&avc->f.fid);
822 new_hash = VCHash(&newFid);
824 /* Remove hash from old position. */
825 /* XXX: not checking array element contents. It shouldn't be empty.
826 * If it oopses, then something else might be wrong.
828 if (afs_vhashT[hash] == avc) {
829 /* First in hash chain (might be the only one). */
830 afs_vhashT[hash] = avc->hnext;
832 /* More elements in hash chain. */
833 for (tvc = afs_vhashT[hash]; tvc; tvc = tvc->hnext) {
834 if (tvc->hnext == avc) {
835 tvc->hnext = avc->hnext;
839 } /* if (!afs_vhashT[i]->hnext) */
840 QRemove(&avc->vhashq);
842 /* Insert hash in new position. */
843 avc->hnext = afs_vhashT[new_hash];
844 afs_vhashT[new_hash] = avc;
845 QAdd(&afs_vhashTV[VCHashV(&newFid)], &avc->vhashq);
847 ReleaseWriteLock(&afs_xvcache);
849 /* Do the same thing for all dcaches. */
850 hash = DVHash(&avc->f.fid);
851 ObtainWriteLock(&afs_xdcache, 743);
852 for (index = afs_dvhashTbl[hash]; index != NULLIDX; index = hash) {
853 hash = afs_dvnextTbl[index];
854 tdc = afs_GetDSlot(index, NULL);
855 ReleaseReadLock(&tdc->tlock);
856 if (afs_indexUnique[index] == avc->f.fid.Fid.Unique) {
857 if (!FidCmp(&tdc->f.fid, &avc->f.fid)) {
859 /* Safer but slower. */
860 afs_HashOutDCache(tdc, 0);
862 /* Put dcache in new positions in the dchash and dvhash. */
863 new_hash = DCHash(&newFid, tdc->f.chunk);
864 afs_dcnextTbl[tdc->index] = afs_dchashTbl[new_hash];
865 afs_dchashTbl[new_hash] = tdc->index;
867 new_hash = DVHash(&newFid);
868 afs_dvnextTbl[tdc->index] = afs_dvhashTbl[new_hash];
869 afs_dvhashTbl[new_hash] = tdc->index;
871 afs_indexUnique[tdc->index] = newFid.Fid.Unique;
872 memcpy(&tdc->f.fid, &newFid, sizeof(struct VenusFid));
874 } /* if uniquifier match */
877 } /* for all dcaches in this hash bucket */
878 ReleaseWriteLock(&afs_xdcache);
880 /* Now we can set the new fid. */
881 memcpy(&avc->f.fid, &newFid, sizeof(struct VenusFid));
886 afs_osi_Free(tname, AFSNAMEMAX);
888 afs_osi_Free(ttargetName, tlen);
893 * Remove a vnode on the server, be it file or directory.
894 * Not much to do here only get the parent dir's fid and call the
897 * \param avc The deleted vcache
900 * \note The vcache refcount should be dropped because it points to
901 * a deleted vnode and has served it's purpouse, but we drop refcount
902 * on shadow dir deletio (we still need it for that).
904 * \note avc must be write locked.
907 afs_ProcessOpRemove(struct vcache *avc, struct vrequest *areq)
910 struct AFSFetchStatus OutDirStatus;
911 struct VenusFid pdir_fid;
912 struct AFSVolSync tsync;
914 struct vcache *tdp = NULL;
918 tname = afs_osi_Alloc(AFSNAMEMAX);
920 /* printf("afs_ProcessOpRemove: Couldn't alloc space for file name\n"); */
924 code = afs_GetParentVCache(avc, 1, &pdir_fid, tname, &tdp);
928 if ((vType(avc) == VDIR) && (afs_CheckDeletedChildren(avc))) {
929 /* Deleted children of this dir remain unsynchronized.
936 if (vType(avc) == VREG || vType(avc) == VLNK) {
937 /* Remove file on server. */
939 tc = afs_Conn(&pdir_fid, areq, SHARED_LOCK);
941 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_REMOVEFILE);
943 code = RXAFS_RemoveFile(tc->id,
953 } while (afs_Analyze(tc,
957 AFS_STATS_FS_RPCIDX_REMOVEFILE,
961 } else if (vType(avc) == VDIR) {
962 /* Remove dir on server. */
964 tc = afs_Conn(&pdir_fid, areq, SHARED_LOCK);
966 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_REMOVEDIR);
968 code = RXAFS_RemoveDir(tc->id,
977 } while (afs_Analyze(tc,
981 AFS_STATS_FS_RPCIDX_REMOVEDIR,
985 } /* if (vType(avc) == VREG) */
987 /* if (code) printf("afs_ProcessOpRemove: server returned code=%u\n", code); */
990 afs_osi_Free(tname, AFSNAMEMAX);
995 * Send disconnected file changes to the server.
997 * \note Call with vnode locked both locally and on the server.
999 * \param avc Vnode that gets synchronized to the server.
1000 * \param areq Used for obtaining a conn struct.
1002 * \return 0 for success. On failure, other error codes.
1005 afs_SendChanges(struct vcache *avc, struct vrequest *areq)
1007 struct afs_conn *tc;
1008 struct AFSStoreStatus sstat;
1009 struct AFSFetchStatus fstat;
1010 struct AFSVolSync tsync;
1015 /* Start multiplexing dirty operations from ddirty_flags field: */
1016 if (avc->f.ddirty_flags & VDisconSetAttrMask) {
1018 /* Turn dirty vc data into a new store status... */
1019 if (afs_GenStoreStatus(avc, &sstat) > 0) {
1021 tc = afs_Conn(&avc->f.fid, areq, SHARED_LOCK);
1023 /* ... and send it. */
1024 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_STORESTATUS);
1026 code = RXAFS_StoreStatus(tc->id,
1027 (struct AFSFid *) &avc->f.fid.Fid,
1037 } while (afs_Analyze(tc,
1041 AFS_STATS_FS_RPCIDX_STORESTATUS,
1045 } /* if (afs_GenStoreStatus() > 0)*/
1046 } /* disconnected SETATTR */
1051 if (avc->f.ddirty_flags &
1055 | VDisconWriteOsiFlush)) {
1059 tc = afs_Conn(&avc->f.fid, areq, SHARED_LOCK);
1061 /* Set storing flags. XXX: A tad inefficient ... */
1062 if (avc->f.ddirty_flags & VDisconWriteClose)
1063 flags |= AFS_LASTSTORE;
1064 if (avc->f.ddirty_flags & VDisconWriteOsiFlush)
1065 flags |= (AFS_SYNC | AFS_LASTSTORE);
1066 if (avc->f.ddirty_flags & VDisconWriteFlush)
1069 /* Try to send store to server. */
1070 /* XXX: AFS_LASTSTORE for writes? Or just AFS_SYNC for all? */
1071 code = afs_StoreAllSegments(avc, areq, flags);
1075 } while (afs_Analyze(tc,
1079 AFS_STATS_FS_RPCIDX_STOREDATA,
1083 } /* disconnected TRUNC | WRITE */
1089 * All files that have been dirty before disconnection are going to
1090 * be replayed back to the server.
1092 * \param areq Request from the user.
1093 * \param acred User credentials.
1095 * \return If all files synchronized succesfully, return 0, otherwise
1098 * \note For now, it's the request from the PDiscon pioctl.
1102 afs_ResyncDisconFiles(struct vrequest *areq, afs_ucred_t *acred)
1104 struct afs_conn *tc;
1106 struct AFSFetchStatus fstat;
1107 struct AFSCallBack callback;
1108 struct AFSVolSync tsync;
1110 afs_int32 start = 0;
1112 /*AFS_STATCNT(afs_ResyncDisconFiles);*/
1114 ObtainWriteLock(&afs_disconDirtyLock, 707);
1116 while (!QEmpty(&afs_disconDirty)) {
1117 tvc = QEntry(QPrev(&afs_disconDirty), struct vcache, dirtyq);
1119 /* Can't lock tvc whilst holding the discon dirty lock */
1120 ReleaseWriteLock(&afs_disconDirtyLock);
1122 /* Get local write lock. */
1123 ObtainWriteLock(&tvc->lock, 705);
1125 if (tvc->f.ddirty_flags & VDisconRemove) {
1126 /* Delete the file on the server and just move on
1127 * to the next file. After all, it has been deleted
1128 * we can't replay any other operation it.
1130 code = afs_ProcessOpRemove(tvc, areq);
1133 } else if (tvc->f.ddirty_flags & VDisconCreate) {
1134 /* For newly created files, we don't need a server lock. */
1135 code = afs_ProcessOpCreate(tvc, areq, acred);
1139 tvc->f.ddirty_flags &= ~VDisconCreate;
1140 tvc->f.ddirty_flags |= VDisconCreated;
1143 /* Get server write lock. */
1145 tc = afs_Conn(&tvc->f.fid, areq, SHARED_LOCK);
1147 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_SETLOCK);
1149 code = RXAFS_SetLock(tc->id,
1150 (struct AFSFid *)&tvc->f.fid.Fid,
1158 } while (afs_Analyze(tc,
1162 AFS_STATS_FS_RPCIDX_SETLOCK,
1169 if (tvc->f.ddirty_flags & VDisconRename) {
1170 /* If we're renaming the file, do so now */
1171 code = afs_ProcessOpRename(tvc, areq);
1173 goto unlock_srv_file;
1176 /* Issue a FetchStatus to get info about DV and callbacks. */
1178 tc = afs_Conn(&tvc->f.fid, areq, SHARED_LOCK);
1180 tvc->callback = tc->srvr->server;
1182 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_FETCHSTATUS);
1184 code = RXAFS_FetchStatus(tc->id,
1185 (struct AFSFid *)&tvc->f.fid.Fid,
1194 } while (afs_Analyze(tc,
1198 AFS_STATS_FS_RPCIDX_FETCHSTATUS,
1203 goto unlock_srv_file;
1206 if ((dv_match(tvc, fstat) && (tvc->f.m.Date == fstat.ServerModTime)) ||
1207 (afs_ConflictPolicy == CLIENT_WINS) ||
1208 (tvc->f.ddirty_flags & VDisconCreated)) {
1210 * Send changes to the server if there's data version match, or
1211 * client wins policy has been selected or file has been created
1212 * but doesn't have it's the contents on to the server yet.
1215 * XXX: Checking server attr changes by timestamp might not the
1216 * most elegant solution, but it's the most viable one that we could find.
1218 afs_UpdateStatus(tvc, &tvc->f.fid, areq, &fstat, &callback, start);
1219 code = afs_SendChanges(tvc, areq);
1221 } else if (afs_ConflictPolicy == SERVER_WINS) {
1222 /* DV mismatch, apply collision resolution policy. */
1223 /* Discard this files chunks and remove from current dir. */
1224 afs_ResetVCache(tvc, acred);
1225 tvc->f.truncPos = AFS_NOTRUNC;
1227 /* printf("afs_ResyncDisconFiles: no resolution policy selected.\n"); */
1228 } /* if DV match or client wins policy */
1231 /* Release server write lock. */
1234 tc = afs_Conn(&tvc->f.fid, areq, SHARED_LOCK);
1236 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_RELEASELOCK);
1238 ucode = RXAFS_ReleaseLock(tc->id,
1239 (struct AFSFid *) &tvc->f.fid.Fid,
1245 } while (afs_Analyze(tc,
1249 AFS_STATS_FS_RPCIDX_RELEASELOCK,
1254 ObtainWriteLock(&afs_disconDirtyLock, 710);
1256 /* Replayed successfully - pull the vcache from the
1257 * disconnected list */
1258 tvc->f.ddirty_flags = 0;
1259 QRemove(&tvc->dirtyq);
1262 if (code == EAGAIN) {
1263 /* Operation was deferred. Pull it from the current place in
1264 * the list, and stick it at the end again */
1265 QRemove(&tvc->dirtyq);
1266 QAdd(&afs_disconDirty, &tvc->dirtyq);
1268 /* Failed - keep state as is, and let the user know we died */
1270 ReleaseWriteLock(&tvc->lock);
1275 /* Release local write lock. */
1276 ReleaseWriteLock(&tvc->lock);
1280 ReleaseWriteLock(&afs_disconDirtyLock);
1284 /* Dispose of all of the shadow directories */
1285 afs_DisconDiscardAllShadows(0, acred);
1287 ReleaseWriteLock(&afs_disconDirtyLock);
1292 * Discard all of our shadow directory copies. If squash is true, then
1293 * we also invalidate the vcache holding the shadow directory, to ensure
1294 * that any disconnected changes are deleted
1299 * \note afs_disconDirtyLock must be held on entry. It will be released
1304 afs_DisconDiscardAllShadows(int squash, afs_ucred_t *acred)
1308 while (!QEmpty(&afs_disconShadow)) {
1309 tvc = QEntry(QNext(&afs_disconShadow), struct vcache, shadowq);
1311 /* Must release the dirty lock to be able to get a vcache lock */
1312 ReleaseWriteLock(&afs_disconDirtyLock);
1313 ObtainWriteLock(&tvc->lock, 706);
1316 afs_ResetVCache(tvc, acred);
1318 afs_DeleteShadowDir(tvc);
1320 ReleaseWriteLock(&tvc->lock);
1321 ObtainWriteLock(&afs_disconDirtyLock, 709);
1326 * This function throws away the whole disconnected state, allowing
1327 * the cache manager to reconnect to a server if we get into a state
1328 * where reconiliation is impossible.
1334 afs_DisconDiscardAll(afs_ucred_t *acred)
1338 ObtainWriteLock(&afs_disconDirtyLock, 717);
1339 while (!QEmpty(&afs_disconDirty)) {
1340 tvc = QEntry(QPrev(&afs_disconDirty), struct vcache, dirtyq);
1341 QRemove(&tvc->dirtyq);
1342 ReleaseWriteLock(&afs_disconDirtyLock);
1344 ObtainWriteLock(&tvc->lock, 718);
1345 afs_ResetVCache(tvc, acred);
1346 tvc->f.truncPos = AFS_NOTRUNC;
1347 ReleaseWriteLock(&tvc->lock);
1348 ObtainWriteLock(&afs_disconDirtyLock, 719);
1352 afs_DisconDiscardAllShadows(1, acred);
1354 ReleaseWriteLock(&afs_disconDirtyLock);
1358 * Print list of disconnected files.
1360 * \note Call with afs_DDirtyVCListLock read locked.
1363 afs_DbgDisconFiles(void)
1369 afs_warn("List of dirty files: \n");
1371 ObtainReadLock(&afs_disconDirtyLock);
1372 for (q = QPrev(&afs_disconDirty); q != &afs_disconDirty; q = QPrev(q)) {
1373 tvc = QEntry(q, struct vcache, dirtyq);
1375 afs_warn("Cell=%u Volume=%u VNode=%u Unique=%u\n",
1377 tvc->f.fid.Fid.Volume,
1378 tvc->f.fid.Fid.Vnode,
1379 tvc->f.fid.Fid.Unique);
1383 osi_Panic("afs_DbgDisconFiles: loop in dirty list\n");
1385 ReleaseReadLock(&afs_disconDirtyLock);
1389 * Generate a fake fid for a disconnected shadow dir.
1390 * Similar to afs_GenFakeFid, only that it uses the dhash
1391 * to search for a uniquifier because a shadow dir lives only
1396 * \note Don't forget to fill in afid with Cell and Volume.
1399 afs_GenShadowFid(struct VenusFid *afid)
1401 afs_uint32 i, index, max_unique = 1;
1402 struct vcache *tvc = NULL;
1404 /* Try generating a fid that isn't used in the vhash. */
1406 /* Shadow Fids are always directories */
1407 afid->Fid.Vnode = afs_DisconVnode + 1;
1410 ObtainWriteLock(&afs_xdcache, 737);
1411 for (index = afs_dvhashTbl[i]; index != NULLIDX; index = i) {
1412 i = afs_dvnextTbl[index];
1413 if (afs_indexUnique[index] > max_unique)
1414 max_unique = afs_indexUnique[index];
1417 ReleaseWriteLock(&afs_xdcache);
1418 afid->Fid.Unique = max_unique + 1;
1419 afs_DisconVnode += 2;
1420 if (!afs_DisconVnode)
1421 afs_DisconVnode = 2;
1423 /* Is this a used vnode? */
1424 ObtainSharedLock(&afs_xvcache, 762);
1425 tvc = afs_FindVCache(afid, 0, 1);
1426 ReleaseSharedLock(&afs_xvcache);
1433 * Generate a fake fid (vnode and uniquifier) for a vcache
1434 * (either dir or normal file). The vnode is generated via
1435 * afs_DisconVNode and the uniquifier by getting the highest
1436 * uniquifier on a hash chain and incrementing it by one.
1438 * \param afid The fid structre that will be filled.
1439 * \param avtype Vnode type: VDIR/VREG.
1440 * \param lock True indicates that xvcache may be obtained,
1441 * False that it is already held
1443 * \note The cell number must be completed somewhere else.
1446 afs_GenFakeFid(struct VenusFid *afid, afs_uint32 avtype, int lock)
1449 afs_uint32 max_unique = 0, i;
1453 afid->Fid.Vnode = afs_DisconVnode + 1;
1457 afid->Fid.Vnode = afs_DisconVnode;
1462 ObtainWriteLock(&afs_xvcache, 736);
1464 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
1465 if (tvc->f.fid.Fid.Unique > max_unique)
1466 max_unique = tvc->f.fid.Fid.Unique;
1469 ReleaseWriteLock(&afs_xvcache);
1471 afid->Fid.Unique = max_unique + 1;
1472 afs_DisconVnode += 2;
1473 if (!afs_DisconVnode)
1474 afs_DisconVnode = 2;
1478 * Fill in stats for a newly created file/directory.
1480 * \param adp The parent dir's vcache.
1481 * \param avc The created vnode.
1482 * \param afid The new fid.
1485 * \param file_type Specify if file or directory.
1487 * \note Call with avc write locked.
1490 afs_GenDisconStatus(struct vcache *adp, struct vcache *avc,
1491 struct VenusFid *afid, struct vattr *attrs,
1492 struct vrequest *areq, int file_type)
1494 memcpy(&avc->f.fid, afid, sizeof(struct VenusFid));
1495 avc->f.m.Mode = attrs->va_mode;
1497 * avc->f.m.Owner = attrs->va_uid;
1498 * But now we use the parent dir's ownership,
1499 * there's no other way to get a server owner id.
1500 * XXX: Does it really matter?
1502 avc->f.m.Group = adp->f.m.Group;
1503 avc->f.m.Owner = adp->f.m.Owner;
1504 hset64(avc->f.m.DataVersion, 0, 0);
1505 avc->f.m.Length = attrs->va_size;
1506 avc->f.m.Date = osi_Time();
1509 vSetType(avc, VREG);
1510 avc->f.m.Mode |= S_IFREG;
1511 avc->f.m.LinkCount = 1;
1512 avc->f.parent.vnode = adp->f.fid.Fid.Vnode;
1513 avc->f.parent.unique = adp->f.fid.Fid.Unique;
1516 vSetType(avc, VDIR);
1517 avc->f.m.Mode |= S_IFDIR;
1518 avc->f.m.LinkCount = 2;
1521 vSetType(avc, VLNK);
1522 avc->f.m.Mode |= S_IFLNK;
1523 if ((avc->f.m.Mode & 0111) == 0)
1525 avc->f.parent.vnode = adp->f.fid.Fid.Vnode;
1526 avc->f.parent.unique = adp->f.fid.Fid.Unique;
1531 avc->f.anyAccess = adp->f.anyAccess;
1532 afs_AddAxs(avc->Access, areq->uid, adp->Access->axess);
1534 avc->callback = NULL;
1535 avc->f.states |= CStatd;
1536 avc->f.states &= ~CBulkFetching;