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"
19 #define dv_match(vc, fstat) \
20 ((vc->f.m.DataVersion.low == fstat.DataVersion) && \
21 (vc->f.m.DataVersion.high == fstat.dataVersionHigh))
23 /*! Circular queue of dirty vcaches */
24 struct afs_q afs_disconDirty;
26 /*! Circular queue of vcaches with shadow directories */
27 struct afs_q afs_disconShadow;
29 /*! Locks both of these lists. Must be write locked for anything other than
31 afs_rwlock_t afs_disconDirtyLock;
33 extern afs_int32 *afs_dvhashTbl; /*Data cache hash table */
34 extern afs_int32 *afs_dchashTbl; /*Data cache hash table */
35 extern afs_int32 *afs_dvnextTbl; /*Dcache hash table links */
36 extern afs_int32 *afs_dcnextTbl; /*Dcache hash table links */
37 extern struct dcache **afs_indexTable; /*Pointers to dcache entries */
39 /*! Vnode number. On file creation, use the current value and increment it.
41 afs_uint32 afs_DisconVnode = 2;
43 /*! Conflict policy. */
51 afs_int32 afs_ConflictPolicy = SERVER_WINS;
53 static void afs_DisconDiscardAllShadows(int, AFS_UCRED *);
54 void afs_DbgListDirEntries(struct VenusFid *afid);
58 * Find the first dcache of a file that has the specified fid.
59 * Similar to afs_FindDCache, only that it takes a fid instead
60 * of a vcache and it can get the first dcache.
64 * \return The found dcache or NULL.
66 struct dcache *afs_FindDCacheByFid(struct VenusFid *afid)
69 struct dcache *tdc = NULL;
72 ObtainWriteLock(&afs_xdcache, 758);
73 for (index = afs_dvhashTbl[i]; index != NULLIDX;) {
74 if (afs_indexUnique[index] == afid->Fid.Unique) {
75 tdc = afs_GetDSlot(index, NULL);
76 ReleaseReadLock(&tdc->tlock);
77 if (!FidCmp(&tdc->f.fid, afid)) {
78 break; /* leaving refCount high for caller */
82 index = afs_dvnextTbl[index];
84 ReleaseWriteLock(&afs_xdcache);
92 * Generate a store status from a dirty vcache entry.
94 * \param avc Dirty vcache entry.
97 * \note The vnode must be share locked. It is called only on resync,
98 * where the vnode is write locked locally and and the server.
100 * \return Mask of operations.
102 int 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.
132 int get_parent_dir_fid_hook(void *hdata,
137 struct VenusFid *tfid = (struct VenusFid *) hdata;
139 if ((aname[0] == '.') && (aname[1] == '.') && !aname[2]) {
140 tfid->Fid.Vnode = vnode;
141 tfid->Fid.Unique = unique;
149 * Get a the dir's fid by looking in the vcache for simple files and
150 * in the ".." entry for directories.
152 * \param avc The file's vhash entry.
153 * \param afid Put the fid here.
155 * \return 0 on success, -1 on failure
157 int 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.
206 int get_vnode_name_hook(void *hdata,
211 struct NameAndFid *nf = (struct NameAndFid *) hdata;
213 if ((nf->fid->Fid.Vnode == vnode) &&
214 (nf->fid->Fid.Unique == unique)) {
215 nf->name_len = strlen(aname);
216 memcpy(nf->name, aname, nf->name_len);
217 nf->name[nf->name_len] = 0;
226 * Try to get a vnode's name by comparing all parent dir's entries
227 * to the given fid. It can also return the dir's dcache.
229 * \param avc The file's vcache.
230 * \param afid The parent dir's fid.
231 * \param aname A preallocated string for the name.
232 * \param deleted Has this file been deleted? If yes, use the shadow
233 * dir for looking up the name.
235 int afs_GetVnodeName(struct vcache *avc,
236 struct VenusFid *afid,
242 struct vcache *parent_vc;
243 struct NameAndFid tnf;
244 struct VenusFid parent_fid;
245 struct VenusFid shadow_fid;
247 /* List dir contents and get it's tdc. */
249 /* For deleted files, get the shadow dir's tdc: */
251 /* Get the parent dir's vcache that contains the shadow fid. */
252 parent_fid.Cell = avc->f.fid.Cell;
253 parent_fid.Fid.Volume = avc->f.fid.Fid.Volume;
254 if (avc->f.ddirty_flags & VDisconRename) {
255 /* For renames the old dir fid is needed. */
256 parent_fid.Fid.Vnode = avc->f.oldParent.vnode;
257 parent_fid.Fid.Unique = avc->f.oldParent.unique;
259 parent_fid.Fid.Vnode = afid->Fid.Vnode;
260 parent_fid.Fid.Unique = afid->Fid.Unique;
263 /* Get the parent dir's vcache that contains the shadow fid. */
264 ObtainSharedLock(&afs_xvcache, 755);
265 parent_vc = afs_FindVCache(&parent_fid, 0, 1);
266 ReleaseSharedLock(&afs_xvcache);
271 shadow_fid.Cell = parent_vc->f.fid.Cell;
272 shadow_fid.Fid.Volume = parent_vc->f.fid.Fid.Volume;
273 shadow_fid.Fid.Vnode = parent_vc->f.shadow.vnode;
274 shadow_fid.Fid.Unique = parent_vc->f.shadow.unique;
276 afs_PutVCache(parent_vc);
278 /* Get shadow dir's dcache. */
279 tdc = afs_FindDCacheByFid(&shadow_fid);
283 /* For normal files, look into the current dir's entry. */
284 tdc = afs_FindDCacheByFid(afid);
288 tnf.fid = &avc->f.fid;
291 afs_dir_EnumerateDir(tdc, &get_vnode_name_hook, &tnf);
293 if (tnf.name_len == -1)
296 printf("Directory dcache not found!\n");
303 struct DirtyChildrenCount {
309 * Lookup dirty deleted vnodes in this dir.
311 int chk_del_children_hook(void *hdata,
316 struct VenusFid tfid;
317 struct DirtyChildrenCount *v = (struct DirtyChildrenCount *) hdata;
320 if ((aname[0] == '.') && !aname[1])
321 /* Skip processing this dir again.
322 * It would result in an endless loop.
326 if ((aname[0] == '.') && (aname[1] == '.') && !aname[2])
327 /* Don't process parent dir. */
330 /* Get this file's vcache. */
331 tfid.Cell = v->vc->f.fid.Cell;
332 tfid.Fid.Volume = v->vc->f.fid.Fid.Volume;
333 tfid.Fid.Vnode = vnode;
334 tfid.Fid.Unique = unique;
336 ObtainSharedLock(&afs_xvcache, 757);
337 tvc = afs_FindVCache(&tfid, 0, 1);
338 ReleaseSharedLock(&afs_xvcache);
340 /* Count unfinished dirty children. */
342 ObtainReadLock(&tvc->lock);
343 if (tvc->f.ddirty_flags)
345 ReleaseReadLock(&tvc->lock);
354 * Check if entries have been deleted in a vnode's shadow
357 * \return Returns the number of dirty children.
359 * \note afs_DDirtyVCListLock must be write locked.
361 int afs_CheckDeletedChildren(struct vcache *avc)
364 struct DirtyChildrenCount dcc;
365 struct VenusFid shadow_fid;
367 if (!avc->f.shadow.vnode)
371 shadow_fid.Cell = avc->f.fid.Cell;
372 shadow_fid.Fid.Volume = avc->f.fid.Fid.Volume;
373 shadow_fid.Fid.Vnode = avc->f.shadow.vnode;
374 shadow_fid.Fid.Unique = avc->f.shadow.unique;
378 /* Get shadow dir's dcache. */
379 tdc = afs_FindDCacheByFid(&shadow_fid);
382 afs_dir_EnumerateDir(tdc, &chk_del_children_hook, &dcc);
390 * Changes a file's parent fid references.
392 int fix_children_fids_hook(void *hdata,
397 struct VenusFid tfid;
398 struct VenusFid *afid = (struct VenusFid *) hdata;
400 struct dcache *tdc = NULL;
402 if ((aname[0] == '.') && !aname[1])
405 if ((aname[0] == '.') && (aname[1] == '.') && !aname[2])
408 tfid.Cell = afid->Cell;
409 tfid.Fid.Volume = afid->Fid.Volume;
410 tfid.Fid.Vnode = vnode;
411 tfid.Fid.Unique = unique;
414 /* vnode's parity indicates that it's a file. */
416 /* Get the vcache. */
417 ObtainSharedLock(&afs_xvcache, 759);
418 tvc = afs_FindVCache(&tfid, 0, 1);
419 ReleaseSharedLock(&afs_xvcache);
421 /* Change the fields. */
423 tvc->f.parent.vnode = afid->Fid.Vnode;
424 tvc->f.parent.unique = afid->Fid.Unique;
429 /* It's a dir. Fix this dir's .. entry to contain the new fid. */
430 /* Seek the dir's dcache. */
431 tdc = afs_FindDCacheByFid(&tfid);
433 /* Change the .. entry fid. */
434 afs_dir_ChangeFid(tdc, "..", NULL, &afid->Fid.Vnode);
437 } /* if (!(vnode % 2))*/
443 * Fixes the parentVnode and parentUnique fields of all
444 * files (not dirs) contained in the directory pointed by
445 * old_fid. This is useful on resync, when a locally created dir
446 * get's a new fid and all the children references must be updated
447 * to reflect the new fid.
449 * \note The dir's fid hasn't been changed yet, it is still referenced
452 * \param old_fid The current dir's fid.
453 * \param new_fid The new dir's fid.
455 void afs_FixChildrenFids(struct VenusFid *old_fid, struct VenusFid *new_fid)
459 /* Get shadow dir's dcache. */
460 tdc = afs_FindDCacheByFid(old_fid);
461 /* Change the fids. */
463 afs_dir_EnumerateDir(tdc, &fix_children_fids_hook, new_fid);
468 int list_dir_hook(void *hdata, char *aname, afs_int32 vnode, afs_int32 unique)
470 printf("list_dir_hook: %s v:%u u:%u\n", aname, vnode, unique);
474 void 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");
541 * Handles file renaming on reconnection:
542 * - Get the old name from the old dir's shadow dir.
543 * - Get the new name from the current dir.
544 * - Old dir fid and new dir fid are collected along the way.
546 int afs_ProcessOpRename(struct vcache *avc, struct vrequest *areq)
548 struct VenusFid old_pdir_fid, new_pdir_fid;
549 char *old_name = NULL, *new_name = NULL;
550 struct AFSFetchStatus OutOldDirStatus, OutNewDirStatus;
551 struct AFSVolSync tsync;
556 /* Get old dir vcache. */
557 old_pdir_fid.Cell = avc->f.fid.Cell;
558 old_pdir_fid.Fid.Volume = avc->f.fid.Fid.Volume;
559 old_pdir_fid.Fid.Vnode = avc->f.oldParent.vnode;
560 old_pdir_fid.Fid.Unique = avc->f.oldParent.unique;
563 old_name = (char *) afs_osi_Alloc(AFSNAMEMAX);
565 printf("afs_ProcessOpRename: Couldn't alloc space for old name.\n");
568 code = afs_GetVnodeName(avc, &old_pdir_fid, old_name, 1);
570 printf("afs_ProcessOpRename: Couldn't find old name.\n");
574 /* Alloc data first. */
575 new_name = (char *) afs_osi_Alloc(AFSNAMEMAX);
577 printf("afs_ProcessOpRename: Couldn't alloc space for new name.\n");
582 if (avc->f.ddirty_flags & VDisconRenameSameDir) {
583 /* If we're in the same dir, don't do the lookups all over again,
584 * just copy fid and vcache from the old dir.
586 memcpy(&new_pdir_fid, &old_pdir_fid, sizeof(struct VenusFid));
588 /* Get parent dir's FID.*/
589 if (afs_GetParentDirFid(avc, &new_pdir_fid)) {
590 printf("afs_ProcessOpRename: Couldn't find new parent dir FID.\n");
596 /* And finally get the new name. */
597 code = afs_GetVnodeName(avc, &new_pdir_fid, new_name, 0);
599 printf("afs_ProcessOpRename: Couldn't find new name.\n");
603 /* Send to data to server. */
605 tc = afs_Conn(&old_pdir_fid, areq, SHARED_LOCK);
607 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_RENAME);
609 code = RXAFS_Rename(tc->id,
610 (struct AFSFid *)&old_pdir_fid.Fid,
612 (struct AFSFid *)&new_pdir_fid.Fid,
622 } while (afs_Analyze(tc,
626 AFS_STATS_FS_RPCIDX_RENAME,
631 printf("afs_ProcessOpRename: server code=%u\n", code);
634 afs_osi_Free(new_name, AFSNAMEMAX);
636 afs_osi_Free(old_name, AFSNAMEMAX);
641 * Handles all the reconnection details:
642 * - Get all the details about the vnode: name, fid, and parent dir fid.
643 * - Send data to server.
645 * - Reorder vhash and dcaches in their hashes, using the newly acquired fid.
647 int afs_ProcessOpCreate(struct vcache *avc, struct vrequest *areq,
650 char *tname = NULL, *ttargetName = NULL;
651 struct AFSStoreStatus InStatus;
652 struct AFSFetchStatus OutFidStatus, OutDirStatus;
653 struct VenusFid pdir_fid, newFid;
654 struct AFSCallBack CallBack;
655 struct AFSVolSync tsync;
656 struct vcache *tdp = NULL, *tvc = NULL;
657 struct dcache *tdc = NULL;
659 afs_int32 hash, new_hash, index;
664 tname = afs_osi_Alloc(AFSNAMEMAX);
668 code = afs_GetParentVCache(avc, 0, &pdir_fid, tname, &tdp);
672 /* This data may also be in linkData, but then we have to deal with
673 * the joy of terminating NULLs and . and file modes. So just get
674 * it from the dcache where it won't have been fiddled with.
676 if (vType(avc) == VLNK) {
679 struct osi_file *tfile;
681 tdc = afs_GetDCache(avc, 0, areq, &offset, &tlen, 0);
693 tlen++; /* space for NULL */
694 ttargetName = afs_osi_Alloc(tlen);
699 ObtainReadLock(&tdc->lock);
700 tfile = afs_CFileOpen(&tdc->f.inode);
701 code = afs_CFileRead(tfile, 0, ttargetName, tlen);
702 ttargetName[tlen-1] = '\0';
703 afs_CFileClose(tfile);
704 ReleaseReadLock(&tdc->lock);
706 printf("Read target name as %s\n",ttargetName);
710 InStatus.Mask = AFS_SETMODTIME | AFS_SETMODE | AFS_SETGROUP;
711 InStatus.ClientModTime = avc->f.m.Date;
712 InStatus.Owner = avc->f.m.Owner;
713 InStatus.Group = (afs_int32) acred->cr_gid;
714 /* Only care about protection bits. */
715 InStatus.UnixModeBits = avc->f.m.Mode & 0xffff;
718 tc = afs_Conn(&tdp->f.fid, areq, SHARED_LOCK);
720 switch (vType(avc)) {
722 /* Make file on server. */
723 op = AFS_STATS_FS_RPCIDX_CREATEFILE;
724 XSTATS_START_TIME(op);
726 code = RXAFS_CreateFile(tc->id,
727 (struct AFSFid *)&tdp->f.fid.Fid,
729 (struct AFSFid *) &newFid.Fid,
730 &OutFidStatus, &OutDirStatus,
736 /* Make dir on server. */
737 op = AFS_STATS_FS_RPCIDX_MAKEDIR;
738 XSTATS_START_TIME(op);
740 code = RXAFS_MakeDir(tc->id, (struct AFSFid *) &tdp->f.fid.Fid,
742 (struct AFSFid *) &newFid.Fid,
743 &OutFidStatus, &OutDirStatus,
749 /* Make symlink on server. */
750 op = AFS_STATS_FS_RPCIDX_SYMLINK;
751 XSTATS_START_TIME(op);
753 code = RXAFS_Symlink(tc->id,
754 (struct AFSFid *) &tdp->f.fid.Fid,
755 tname, ttargetName, &InStatus,
756 (struct AFSFid *) &newFid.Fid,
757 &OutFidStatus, &OutDirStatus, &tsync);
762 op = AFS_STATS_FS_RPCIDX_CREATEFILE;
768 } while (afs_Analyze(tc, code, &tdp->f.fid, areq, op, SHARED_LOCK, NULL));
770 /* TODO: Handle errors. */
772 printf("afs_ProcessOpCreate: error while creating vnode on server, code=%d .\n", code);
776 /* The rpc doesn't set the cell number. */
777 newFid.Cell = avc->f.fid.Cell;
780 * Change the fid in the dir entry.
783 /* Seek the dir's dcache. */
784 tdc = afs_FindDCacheByFid(&tdp->f.fid);
786 /* And now change the fid in the parent dir entry. */
787 afs_dir_ChangeFid(tdc, tname, &avc->f.fid.Fid.Vnode, &newFid.Fid.Vnode);
791 if (vType(avc) == VDIR) {
792 /* Change fid in the dir for the "." entry. ".." has alredy been
793 * handled by afs_FixChildrenFids when processing the parent dir.
795 tdc = afs_FindDCacheByFid(&avc->f.fid);
797 afs_dir_ChangeFid(tdc, ".", &avc->f.fid.Fid.Vnode,
800 if (avc->f.m.LinkCount >= 2)
801 /* For non empty dirs, fix children's parentVnode and
802 * parentUnique reference.
804 afs_FixChildrenFids(&avc->f.fid, &newFid);
810 /* Recompute hash chain positions for vnode and dcaches.
811 * Then change to the new FID.
814 /* The vcache goes first. */
815 ObtainWriteLock(&afs_xvcache, 735);
818 hash = VCHash(&avc->f.fid);
820 new_hash = VCHash(&newFid);
822 /* Remove hash from old position. */
823 /* XXX: not checking array element contents. It shouldn't be empty.
824 * If it oopses, then something else might be wrong.
826 if (afs_vhashT[hash] == avc) {
827 /* First in hash chain (might be the only one). */
828 afs_vhashT[hash] = avc->hnext;
830 /* More elements in hash chain. */
831 for (tvc = afs_vhashT[hash]; tvc; tvc = tvc->hnext) {
832 if (tvc->hnext == avc) {
833 tvc->hnext = avc->hnext;
837 } /* if (!afs_vhashT[i]->hnext) */
838 QRemove(&avc->vhashq);
840 /* Insert hash in new position. */
841 avc->hnext = afs_vhashT[new_hash];
842 afs_vhashT[new_hash] = avc;
843 QAdd(&afs_vhashTV[VCHashV(&newFid)], &avc->vhashq);
845 ReleaseWriteLock(&afs_xvcache);
847 /* Do the same thing for all dcaches. */
848 hash = DVHash(&avc->f.fid);
849 ObtainWriteLock(&afs_xdcache, 743);
850 for (index = afs_dvhashTbl[hash]; index != NULLIDX; index = hash) {
851 hash = afs_dvnextTbl[index];
852 tdc = afs_GetDSlot(index, NULL);
853 ReleaseReadLock(&tdc->tlock);
854 if (afs_indexUnique[index] == avc->f.fid.Fid.Unique) {
855 if (!FidCmp(&tdc->f.fid, &avc->f.fid)) {
857 /* Safer but slower. */
858 afs_HashOutDCache(tdc, 0);
860 /* Put dcache in new positions in the dchash and dvhash. */
861 new_hash = DCHash(&newFid, tdc->f.chunk);
862 afs_dcnextTbl[tdc->index] = afs_dchashTbl[new_hash];
863 afs_dchashTbl[new_hash] = tdc->index;
865 new_hash = DVHash(&newFid);
866 afs_dvnextTbl[tdc->index] = afs_dvhashTbl[new_hash];
867 afs_dvhashTbl[new_hash] = tdc->index;
869 afs_indexUnique[tdc->index] = newFid.Fid.Unique;
870 memcpy(&tdc->f.fid, &newFid, sizeof(struct VenusFid));
872 } /* if uniquifier match */
875 } /* for all dcaches in this hash bucket */
876 ReleaseWriteLock(&afs_xdcache);
878 /* Now we can set the new fid. */
879 memcpy(&avc->f.fid, &newFid, sizeof(struct VenusFid));
884 afs_osi_Free(tname, AFSNAMEMAX);
886 afs_osi_Free(ttargetName, tlen);
891 * Remove a vnode on the server, be it file or directory.
892 * Not much to do here only get the parent dir's fid and call the
895 * \param avc The deleted vcache
898 * \note The vcache refcount should be dropped because it points to
899 * a deleted vnode and has served it's purpouse, but we drop refcount
900 * on shadow dir deletio (we still need it for that).
902 * \note avc must be write locked.
904 int afs_ProcessOpRemove(struct vcache *avc, struct vrequest *areq)
907 struct AFSFetchStatus OutDirStatus;
908 struct VenusFid pdir_fid;
909 struct AFSVolSync tsync;
911 struct vcache *tdp = NULL;
915 tname = afs_osi_Alloc(AFSNAMEMAX);
917 printf("afs_ProcessOpRemove: Couldn't alloc space for file name\n");
921 code = afs_GetParentVCache(avc, 1, &pdir_fid, tname, &tdp);
925 if ((vType(avc) == VDIR) && (afs_CheckDeletedChildren(avc))) {
926 /* Deleted children of this dir remain unsynchronized.
933 if (vType(avc) == VREG || vType(avc) == VLNK) {
934 /* Remove file on server. */
936 tc = afs_Conn(&pdir_fid, areq, SHARED_LOCK);
938 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_REMOVEFILE);
940 code = RXAFS_RemoveFile(tc->id,
950 } while (afs_Analyze(tc,
954 AFS_STATS_FS_RPCIDX_REMOVEFILE,
958 } else if (vType(avc) == VDIR) {
959 /* Remove dir on server. */
961 tc = afs_Conn(&pdir_fid, areq, SHARED_LOCK);
963 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_REMOVEDIR);
965 code = RXAFS_RemoveDir(tc->id,
974 } while (afs_Analyze(tc,
978 AFS_STATS_FS_RPCIDX_REMOVEDIR,
982 } /* if (vType(avc) == VREG) */
985 printf("afs_ProcessOpRemove: server returned code=%u\n", code);
988 afs_osi_Free(tname, AFSNAMEMAX);
993 * Send disconnected file changes to the server.
995 * \note Call with vnode locked both locally and on the server.
997 * \param avc Vnode that gets synchronized to the server.
998 * \param areq Used for obtaining a conn struct.
1000 * \return 0 for success. On failure, other error codes.
1002 int afs_SendChanges(struct vcache *avc, struct vrequest *areq)
1004 struct afs_conn *tc;
1005 struct AFSStoreStatus sstat;
1006 struct AFSFetchStatus fstat;
1007 struct AFSVolSync tsync;
1012 /* Start multiplexing dirty operations from ddirty_flags field: */
1013 if (avc->f.ddirty_flags & VDisconSetAttrMask) {
1015 /* Turn dirty vc data into a new store status... */
1016 if (afs_GenStoreStatus(avc, &sstat) > 0) {
1018 tc = afs_Conn(&avc->f.fid, areq, SHARED_LOCK);
1020 /* ... and send it. */
1021 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_STORESTATUS);
1023 code = RXAFS_StoreStatus(tc->id,
1024 (struct AFSFid *) &avc->f.fid.Fid,
1034 } while (afs_Analyze(tc,
1038 AFS_STATS_FS_RPCIDX_STORESTATUS,
1042 } /* if (afs_GenStoreStatus() > 0)*/
1043 } /* disconnected SETATTR */
1048 if (avc->f.ddirty_flags &
1052 | VDisconWriteOsiFlush)) {
1056 tc = afs_Conn(&avc->f.fid, areq, SHARED_LOCK);
1058 /* Set storing flags. XXX: A tad inefficient ... */
1059 if (avc->f.ddirty_flags & VDisconWriteClose)
1060 flags |= AFS_LASTSTORE;
1061 if (avc->f.ddirty_flags & VDisconWriteOsiFlush)
1062 flags |= (AFS_SYNC | AFS_LASTSTORE);
1063 if (avc->f.ddirty_flags & VDisconWriteFlush)
1066 /* Try to send store to server. */
1067 /* XXX: AFS_LASTSTORE for writes? Or just AFS_SYNC for all? */
1068 code = afs_StoreAllSegments(avc, areq, flags);
1072 } while (afs_Analyze(tc,
1076 AFS_STATS_FS_RPCIDX_STOREDATA,
1080 } /* disconnected TRUNC | WRITE */
1086 * All files that have been dirty before disconnection are going to
1087 * be replayed back to the server.
1089 * \param areq Request from the user.
1090 * \param acred User credentials.
1092 * \return If all files synchronized succesfully, return 0, otherwise
1095 * \note For now, it's the request from the PDiscon pioctl.
1098 int afs_ResyncDisconFiles(struct vrequest *areq, AFS_UCRED *acred)
1100 struct afs_conn *tc;
1102 struct AFSFetchStatus fstat;
1103 struct AFSCallBack callback;
1104 struct AFSVolSync tsync;
1106 afs_int32 start = 0;
1108 /*AFS_STATCNT(afs_ResyncDisconFiles);*/
1110 ObtainWriteLock(&afs_disconDirtyLock, 707);
1112 while (!QEmpty(&afs_disconDirty)) {
1113 tvc = QEntry(QPrev(&afs_disconDirty), struct vcache, dirtyq);
1115 /* Can't lock tvc whilst holding the discon dirty lock */
1116 ReleaseWriteLock(&afs_disconDirtyLock);
1118 /* Get local write lock. */
1119 ObtainWriteLock(&tvc->lock, 705);
1121 if (tvc->f.ddirty_flags & VDisconRemove) {
1122 /* Delete the file on the server and just move on
1123 * to the next file. After all, it has been deleted
1124 * we can't replay any other operation it.
1126 code = afs_ProcessOpRemove(tvc, areq);
1129 } else if (tvc->f.ddirty_flags & VDisconCreate) {
1130 /* For newly created files, we don't need a server lock. */
1131 code = afs_ProcessOpCreate(tvc, areq, acred);
1135 tvc->f.ddirty_flags &= ~VDisconCreate;
1136 tvc->f.ddirty_flags |= VDisconCreated;
1139 /* Get server write lock. */
1141 tc = afs_Conn(&tvc->f.fid, areq, SHARED_LOCK);
1143 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_SETLOCK);
1145 code = RXAFS_SetLock(tc->id,
1146 (struct AFSFid *)&tvc->f.fid.Fid,
1154 } while (afs_Analyze(tc,
1158 AFS_STATS_FS_RPCIDX_SETLOCK,
1165 if (tvc->f.ddirty_flags & VDisconRename) {
1166 /* If we're renaming the file, do so now */
1167 code = afs_ProcessOpRename(tvc, areq);
1169 goto unlock_srv_file;
1172 /* Issue a FetchStatus to get info about DV and callbacks. */
1174 tc = afs_Conn(&tvc->f.fid, areq, SHARED_LOCK);
1176 tvc->callback = tc->srvr->server;
1178 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_FETCHSTATUS);
1180 code = RXAFS_FetchStatus(tc->id,
1181 (struct AFSFid *)&tvc->f.fid.Fid,
1190 } while (afs_Analyze(tc,
1194 AFS_STATS_FS_RPCIDX_FETCHSTATUS,
1199 goto unlock_srv_file;
1202 if ((dv_match(tvc, fstat) && (tvc->f.m.Date == fstat.ServerModTime)) ||
1203 (afs_ConflictPolicy == CLIENT_WINS) ||
1204 (tvc->f.ddirty_flags & VDisconCreated)) {
1206 * Send changes to the server if there's data version match, or
1207 * client wins policy has been selected or file has been created
1208 * but doesn't have it's the contents on to the server yet.
1211 * XXX: Checking server attr changes by timestamp might not the
1212 * most elegant solution, but it's the most viable one that we could find.
1214 afs_UpdateStatus(tvc, &tvc->f.fid, areq, &fstat, &callback, start);
1215 code = afs_SendChanges(tvc, areq);
1217 } else if (afs_ConflictPolicy == SERVER_WINS) {
1218 /* DV mismatch, apply collision resolution policy. */
1219 /* Discard this files chunks and remove from current dir. */
1220 afs_ResetVCache(tvc, acred);
1221 tvc->f.truncPos = AFS_NOTRUNC;
1223 printf("afs_ResyncDisconFiles: no resolution policy selected.\n");
1224 } /* if DV match or client wins policy */
1227 /* Release server write lock. */
1230 tc = afs_Conn(&tvc->f.fid, areq, SHARED_LOCK);
1232 XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_RELEASELOCK);
1234 ucode = RXAFS_ReleaseLock(tc->id,
1235 (struct AFSFid *) &tvc->f.fid.Fid,
1241 } while (afs_Analyze(tc,
1245 AFS_STATS_FS_RPCIDX_RELEASELOCK,
1250 ObtainWriteLock(&afs_disconDirtyLock, 710);
1252 /* Replayed successfully - pull the vcache from the
1253 * disconnected list */
1254 tvc->f.ddirty_flags = 0;
1255 QRemove(&tvc->dirtyq);
1258 if (code == EAGAIN) {
1259 /* Operation was deferred. Pull it from the current place in
1260 * the list, and stick it at the end again */
1261 QRemove(&tvc->dirtyq);
1262 QAdd(&afs_disconDirty, &tvc->dirtyq);
1264 /* Failed - keep state as is, and let the user know we died */
1266 ReleaseWriteLock(&tvc->lock);
1271 /* Release local write lock. */
1272 ReleaseWriteLock(&tvc->lock);
1276 ReleaseWriteLock(&afs_disconDirtyLock);
1280 /* Dispose of all of the shadow directories */
1281 afs_DisconDiscardAllShadows(0, acred);
1283 ReleaseWriteLock(&afs_disconDirtyLock);
1288 * Discard all of our shadow directory copies. If squash is true, then
1289 * we also invalidate the vcache holding the shadow directory, to ensure
1290 * that any disconnected changes are deleted
1295 * \note afs_disconDirtyLock must be held on entry. It will be released
1300 afs_DisconDiscardAllShadows(int squash, AFS_UCRED *acred) {
1303 while (!QEmpty(&afs_disconShadow)) {
1304 tvc = QEntry(QNext(&afs_disconShadow), struct vcache, shadowq);
1306 /* Must release the dirty lock to be able to get a vcache lock */
1307 ReleaseWriteLock(&afs_disconDirtyLock);
1308 ObtainWriteLock(&tvc->lock, 706);
1310 afs_DeleteShadowDir(tvc);
1311 tvc->f.shadow.vnode = 0;
1312 tvc->f.shadow.unique = 0;
1315 afs_ResetVCache(tvc, acred);
1317 ReleaseWriteLock(&tvc->lock);
1318 ObtainWriteLock(&afs_disconDirtyLock, 709);
1323 * This function throws away the whole disconnected state, allowing
1324 * the cache manager to reconnect to a server if we get into a state
1325 * where reconiliation is impossible.
1331 afs_DisconDiscardAll(AFS_UCRED *acred) {
1334 ObtainWriteLock(&afs_disconDirtyLock, 717);
1335 while (!QEmpty(&afs_disconDirty)) {
1336 tvc = QEntry(QPrev(&afs_disconDirty), struct vcache, dirtyq);
1337 ReleaseWriteLock(&afs_disconDirtyLock);
1339 ObtainWriteLock(&tvc->lock, 718);
1340 afs_ResetVCache(tvc, acred);
1341 tvc->f.truncPos = AFS_NOTRUNC;
1342 ReleaseWriteLock(&tvc->lock);
1344 ObtainWriteLock(&afs_disconDirtyLock, 719);
1347 afs_DisconDiscardAllShadows(1, acred);
1349 ReleaseWriteLock(&afs_disconDirtyLock);
1353 * Print list of disconnected files.
1355 * \note Call with afs_DDirtyVCListLock read locked.
1357 void afs_DbgDisconFiles(void)
1363 printf("List of dirty files: \n");
1365 ObtainReadLock(&afs_disconDirtyLock);
1366 for (q = QPrev(&afs_disconDirty); q != &afs_disconDirty; q = QPrev(q)) {
1367 tvc = QEntry(q, struct vcache, dirtyq);
1369 printf("Cell=%u Volume=%u VNode=%u Unique=%u\n",
1371 tvc->f.fid.Fid.Volume,
1372 tvc->f.fid.Fid.Vnode,
1373 tvc->f.fid.Fid.Unique);
1377 osi_Panic("afs_DbgDisconFiles: loop in dirty list\n");
1379 ReleaseReadLock(&afs_disconDirtyLock);
1383 * Generate a fake fid for a disconnected shadow dir.
1384 * Similar to afs_GenFakeFid, only that it uses the dhash
1385 * to search for a uniquifier because a shadow dir lives only
1390 * \note Don't forget to fill in afid with Cell and Volume.
1392 void afs_GenShadowFid(struct VenusFid *afid)
1394 afs_uint32 i, index, max_unique = 1;
1395 struct vcache *tvc = NULL;
1397 /* Try generating a fid that isn't used in the vhash. */
1399 /* Shadow Fids are always directories */
1400 afid->Fid.Vnode = afs_DisconVnode + 1;
1403 ObtainWriteLock(&afs_xdcache, 737);
1404 for (index = afs_dvhashTbl[i]; index != NULLIDX; index = i) {
1405 i = afs_dvnextTbl[index];
1406 if (afs_indexUnique[index] > max_unique)
1407 max_unique = afs_indexUnique[index];
1410 ReleaseWriteLock(&afs_xdcache);
1411 afid->Fid.Unique = max_unique + 1;
1412 afs_DisconVnode += 2;
1413 if (!afs_DisconVnode)
1414 afs_DisconVnode = 2;
1416 /* Is this a used vnode? */
1417 ObtainSharedLock(&afs_xvcache, 762);
1418 tvc = afs_FindVCache(afid, 0, 1);
1419 ReleaseSharedLock(&afs_xvcache);
1426 * Generate a fake fid (vnode and uniquifier) for a vcache
1427 * (either dir or normal file). The vnode is generated via
1428 * afs_DisconVNode and the uniquifier by getting the highest
1429 * uniquifier on a hash chain and incrementing it by one.
1431 * \param afid The fid structre that will be filled.
1432 * \param avtype Vnode type: VDIR/VREG.
1433 * \param lock True indicates that xvcache may be obtained,
1434 * False that it is already held
1436 * \note The cell number must be completed somewhere else.
1438 void afs_GenFakeFid(struct VenusFid *afid, afs_uint32 avtype, int lock)
1441 afs_uint32 max_unique = 0, i;
1445 afid->Fid.Vnode = afs_DisconVnode + 1;
1449 afid->Fid.Vnode = afs_DisconVnode;
1454 ObtainWriteLock(&afs_xvcache, 736);
1456 for (tvc = afs_vhashT[i]; tvc; tvc = tvc->hnext) {
1457 if (tvc->f.fid.Fid.Unique > max_unique)
1458 max_unique = tvc->f.fid.Fid.Unique;
1461 ReleaseWriteLock(&afs_xvcache);
1463 afid->Fid.Unique = max_unique + 1;
1464 afs_DisconVnode += 2;
1465 if (!afs_DisconVnode)
1466 afs_DisconVnode = 2;
1470 * Fill in stats for a newly created file/directory.
1472 * \param adp The parent dir's vcache.
1473 * \param avc The created vnode.
1474 * \param afid The new fid.
1477 * \param file_type Specify if file or directory.
1479 * \note Call with avc write locked.
1481 void afs_GenDisconStatus(struct vcache *adp, struct vcache *avc,
1482 struct VenusFid *afid, struct vattr *attrs,
1483 struct vrequest *areq, int file_type)
1485 memcpy(&avc->f.fid, afid, sizeof(struct VenusFid));
1486 avc->f.m.Mode = attrs->va_mode;
1488 * avc->f.m.Owner = attrs->va_uid;
1489 * But now we use the parent dir's ownership,
1490 * there's no other way to get a server owner id.
1491 * XXX: Does it really matter?
1493 avc->f.m.Group = adp->f.m.Group;
1494 avc->f.m.Owner = adp->f.m.Owner;
1495 hset64(avc->f.m.DataVersion, 0, 0);
1496 avc->f.m.Length = attrs->va_size;
1497 avc->f.m.Date = osi_Time();
1500 vSetType(avc, VREG);
1501 avc->f.m.Mode |= S_IFREG;
1502 avc->f.m.LinkCount = 1;
1503 avc->f.parent.vnode = adp->f.fid.Fid.Vnode;
1504 avc->f.parent.unique = adp->f.fid.Fid.Unique;
1507 vSetType(avc, VDIR);
1508 avc->f.m.Mode |= S_IFDIR;
1509 avc->f.m.LinkCount = 2;
1512 vSetType(avc, VLNK);
1513 avc->f.m.Mode |= S_IFLNK;
1514 if ((avc->f.m.Mode & 0111) == 0)
1516 avc->f.parent.vnode = adp->f.fid.Fid.Vnode;
1517 avc->f.parent.unique = adp->f.fid.Fid.Unique;
1522 avc->f.anyAccess = adp->f.anyAccess;
1523 afs_AddAxs(avc->Access, areq->uid, adp->Access->axess);
1525 avc->callback = NULL;
1526 avc->f.states |= CStatd;
1527 avc->f.states &= ~CBulkFetching;