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
9 * Portions Copyright (c) 2006-2010 Sine Nomine Associates
15 Institution: The Information Technology Center, Carnegie-Mellon University
18 #ifndef AFS_PTHREAD_ENV
19 #define USUAL_PRIORITY (LWP_MAX_PRIORITY - 2)
22 * stack size increased from 8K because the HP machine seemed to have trouble
23 * with the smaller stack
25 #define USUAL_STACK_SIZE (24 * 1024)
26 #endif /* !AFS_PTHREAD_ENV */
30 File server synchronization with external volume utilities.
31 server-side implementation
34 /* This controls the size of an fd_set; it must be defined early before
35 * the system headers define that type and the macros that operate on it.
36 * Its value should be as large as the maximum file descriptor limit we
37 * are likely to run into on any platform. Right now, that is 65536
38 * which is the default hard fd limit on Solaris 9 */
40 #define FD_SETSIZE 65536
43 #include <afsconfig.h>
44 #include <afs/param.h>
48 #include <sys/types.h>
57 #include <sys/param.h>
58 #include <sys/socket.h>
59 #include <netinet/in.h>
65 #include <afs/afs_assert.h>
70 #include <afs/afsint.h>
72 #include <afs/errors.h>
73 #include "daemon_com.h"
74 #include "daemon_com_inline.h"
76 #include "fssync_inline.h"
80 #include <afs/afssyscalls.h>
84 #include "volume_inline.h"
85 #include "partition.h"
91 #endif /* HAVE_POLL */
93 #ifdef USE_UNIX_SOCKETS
95 #include <afs/afsutil.h>
96 #endif /* USE_UNIX_SOCKETS */
98 #ifdef FSSYNC_BUILD_SERVER
100 int (*V_BreakVolumeCallbacks) (VolumeId volume);
102 #define MAXHANDLERS 4 /* Up to 4 clients; must be at least 2, so that
103 * move = dump+restore can run on single server */
104 #define MAXOFFLINEVOLUMES 128 /* This needs to be as big as the maximum
105 * number that would be offline for 1 operation.
106 * Current winner is salvage, which needs all
107 * cloned read-only copies offline when salvaging
108 * a single read-write volume */
112 static struct offlineInfo OfflineVolumes[MAXHANDLERS][MAXOFFLINEVOLUMES];
115 * fssync server socket handle.
117 static SYNC_server_state_t fssync_server_state =
118 { OSI_NULLSOCKET, /* file descriptor */
119 FSSYNC_ENDPOINT_DECL, /* server endpoint */
120 FSYNC_PROTO_VERSION, /* protocol version */
121 5, /* bind() retry limit */
122 100, /* listen() queue depth */
123 "FSSYNC", /* protocol name string */
126 #ifdef AFS_DEMAND_ATTACH_FS
128 * a queue of volume pointers to salvage in the background.
130 struct fsync_salv_node {
132 Volume *vp; /**< volume to salvage */
133 unsigned char update_salv_prio; /**< whether we should update the salvage priority or not */
136 struct rx_queue head;
140 static void * FSYNC_salvageThread(void *);
141 static void FSYNC_backgroundSalvage(Volume *vp);
142 #endif /* AFS_DEMAND_ATTACH_FS */
144 /* Forward declarations */
145 static void * FSYNC_sync(void *);
146 static void FSYNC_newconnection(osi_socket afd);
147 static void FSYNC_com(osi_socket fd);
148 static void FSYNC_Drop(osi_socket fd);
149 static void AcceptOn(void);
150 static void AcceptOff(void);
151 static void InitHandler(void);
152 static int AddHandler(osi_socket fd, void (*aproc)(osi_socket));
153 static int FindHandler(osi_socket afd);
154 static int FindHandler_r(osi_socket afd);
155 static int RemoveHandler(osi_socket afd);
156 #if defined(HAVE_POLL) && defined (AFS_PTHREAD_ENV)
157 static void CallHandler(struct pollfd *fds, int nfds, int mask);
158 static void GetHandler(struct pollfd *fds, int maxfds, int events, int *nfds);
160 static void CallHandler(fd_set * fdsetp);
161 static void GetHandler(fd_set * fdsetp, int *maxfdp);
165 static afs_int32 FSYNC_com_VolOp(osi_socket fd, SYNC_command * com, SYNC_response * res);
167 #ifdef AFS_DEMAND_ATTACH_FS
168 static afs_int32 FSYNC_com_VolError(FSSYNC_VolOp_command * com, SYNC_response * res);
170 static afs_int32 FSYNC_com_VolOn(FSSYNC_VolOp_command * com, SYNC_response * res);
171 static afs_int32 FSYNC_com_VolOff(FSSYNC_VolOp_command * com, SYNC_response * res);
172 static afs_int32 FSYNC_com_VolMove(FSSYNC_VolOp_command * com, SYNC_response * res);
173 static afs_int32 FSYNC_com_VolBreakCBKs(FSSYNC_VolOp_command * com, SYNC_response * res);
174 static afs_int32 FSYNC_com_VolDone(FSSYNC_VolOp_command * com, SYNC_response * res);
175 static afs_int32 FSYNC_com_VolQuery(FSSYNC_VolOp_command * com, SYNC_response * res);
176 static afs_int32 FSYNC_com_VolHdrQuery(FSSYNC_VolOp_command * com, SYNC_response * res);
177 #ifdef AFS_DEMAND_ATTACH_FS
178 static afs_int32 FSYNC_com_VGUpdate(osi_socket fd, SYNC_command * com, SYNC_response * res);
179 static afs_int32 FSYNC_com_VolOpQuery(FSSYNC_VolOp_command * com, SYNC_response * res);
180 static afs_int32 FSYNC_com_VGQuery(FSSYNC_VolOp_command * com, SYNC_response * res);
181 static afs_int32 FSYNC_com_VGScan(FSSYNC_VolOp_command * com, SYNC_response * res);
182 static afs_int32 FSYNC_com_VGScanAll(FSSYNC_VolOp_command * com, SYNC_response * res);
183 #endif /* AFS_DEMAND_ATTACH_FS */
185 static afs_int32 FSYNC_com_VnQry(osi_socket fd, SYNC_command * com, SYNC_response * res);
187 static afs_int32 FSYNC_com_StatsOp(osi_socket fd, SYNC_command * com, SYNC_response * res);
189 static afs_int32 FSYNC_com_StatsOpGeneral(FSSYNC_StatsOp_command * scom, SYNC_response * res);
191 #ifdef AFS_DEMAND_ATTACH_FS
192 static afs_int32 FSYNC_com_StatsOpViceP(FSSYNC_StatsOp_command * scom, SYNC_response * res);
193 static afs_int32 FSYNC_com_StatsOpHash(FSSYNC_StatsOp_command * scom, SYNC_response * res);
194 static afs_int32 FSYNC_com_StatsOpHdr(FSSYNC_StatsOp_command * scom, SYNC_response * res);
195 static afs_int32 FSYNC_com_StatsOpVLRU(FSSYNC_StatsOp_command * scom, SYNC_response * res);
198 static void FSYNC_com_to_info(FSSYNC_VolOp_command * vcom, FSSYNC_VolOp_info * info);
200 static int FSYNC_partMatch(FSSYNC_VolOp_command * vcom, Volume * vp, int match_anon);
204 * This lock controls access to the handler array. The overhead
205 * is minimal in non-preemptive environments.
207 struct Lock FSYNC_handler_lock;
212 #ifdef AFS_PTHREAD_ENV
214 pthread_attr_t tattr;
215 #else /* AFS_PTHREAD_ENV */
217 #endif /* AFS_PTHREAD_ENV */
219 Lock_Init(&FSYNC_handler_lock);
221 #ifdef AFS_PTHREAD_ENV
222 osi_Assert(pthread_attr_init(&tattr) == 0);
223 osi_Assert(pthread_attr_setdetachstate(&tattr, PTHREAD_CREATE_DETACHED) == 0);
224 osi_Assert(pthread_create(&tid, &tattr, FSYNC_sync, NULL) == 0);
225 #else /* AFS_PTHREAD_ENV */
226 osi_Assert(LWP_CreateProcess
227 (FSYNC_sync, USUAL_STACK_SIZE, USUAL_PRIORITY, (void *)0,
228 "FSYNC_sync", &pid) == LWP_SUCCESS);
229 #endif /* AFS_PTHREAD_ENV */
231 #ifdef AFS_DEMAND_ATTACH_FS
232 queue_Init(&fsync_salv.head);
233 CV_INIT(&fsync_salv.cv, "fsync salv", CV_DEFAULT, 0);
234 osi_Assert(pthread_create(&tid, &tattr, FSYNC_salvageThread, NULL) == 0);
235 #endif /* AFS_DEMAND_ATTACH_FS */
238 #if defined(HAVE_POLL) && defined(AFS_PTHREAD_ENV)
239 static struct pollfd FSYNC_readfds[MAXHANDLERS];
241 static fd_set FSYNC_readfds;
246 FSYNC_sync(void * args)
250 #ifdef AFS_PTHREAD_ENV
253 SYNC_server_state_t * state = &fssync_server_state;
254 #ifdef AFS_DEMAND_ATTACH_FS
255 VThreadOptions_t * thread_opts;
259 * For non-DAFS, only wait until we begin attaching volumes (instead
260 * of waiting until all volumes are attached), since it can take
261 * awhile until VInit == 2.
264 #endif /* AFS_DEMAND_ATTACH_FS */
266 /* we must not be called before vol package initialization, since we use
267 * vol package mutexes and conds etc */
270 SYNC_getAddr(&state->endpoint, &state->addr);
271 SYNC_cleanupSock(state);
274 (void)signal(SIGPIPE, SIG_IGN);
277 #ifdef AFS_PTHREAD_ENV
278 /* set our 'thread-id' so that the host hold table works */
279 tid = rx_NewThreadId();
280 pthread_setspecific(rx_thread_id_key, (void *)(intptr_t)tid);
281 Log("Set thread id %d for FSYNC_sync\n", tid);
282 #endif /* AFS_PTHREAD_ENV */
286 while (VInit < min_vinit) {
287 /* Let somebody else run until all volumes have been preattached
288 * (DAFS), or we have started attaching volumes (non-DAFS). This
289 * doesn't mean that all volumes have been attached.
291 #ifdef AFS_PTHREAD_ENV
292 VOL_CV_WAIT(&vol_vinit_cond);
293 #else /* AFS_PTHREAD_ENV */
294 LWP_DispatchProcess();
295 #endif /* AFS_PTHREAD_ENV */
300 state->fd = SYNC_getSock(&state->endpoint);
301 code = SYNC_bindSock(state);
304 #ifdef AFS_DEMAND_ATTACH_FS
306 * make sure the volume package is incapable of recursively executing
307 * salvsync calls on this thread, since there is a possibility of
310 thread_opts = malloc(sizeof(VThreadOptions_t));
311 if (thread_opts == NULL) {
312 Log("failed to allocate memory for thread-specific volume package options structure\n");
315 memcpy(thread_opts, &VThread_defaults, sizeof(VThread_defaults));
316 thread_opts->disallow_salvsync = 1;
317 osi_Assert(pthread_setspecific(VThread_key, thread_opts) == 0);
319 code = VVGCache_PkgInit();
320 osi_Assert(code == 0);
327 #if defined(HAVE_POLL) && defined(AFS_PTHREAD_ENV)
329 GetHandler(FSYNC_readfds, MAXHANDLERS, POLLIN|POLLPRI, &nfds);
330 if (poll(FSYNC_readfds, nfds, -1) >=1)
331 CallHandler(FSYNC_readfds, nfds, POLLIN|POLLPRI);
334 GetHandler(&FSYNC_readfds, &maxfd);
335 /* Note: check for >= 1 below is essential since IOMGR_select
336 * doesn't have exactly same semantics as select.
338 #ifdef AFS_PTHREAD_ENV
339 if (select(maxfd + 1, &FSYNC_readfds, NULL, NULL, NULL) >= 1)
340 #else /* AFS_PTHREAD_ENV */
341 if (IOMGR_Select(maxfd + 1, &FSYNC_readfds, NULL, NULL, NULL) >= 1)
342 #endif /* AFS_PTHREAD_ENV */
343 CallHandler(&FSYNC_readfds);
346 return NULL; /* hush now, little gcc */
349 #ifdef AFS_DEMAND_ATTACH_FS
351 * thread for salvaging volumes in the background.
353 * Since FSSYNC handlers cannot issue SALVSYNC requests in order to avoid
354 * deadlock issues, this thread exists so code in the FSSYNC handler thread
355 * can hand off volumes to be salvaged in the background.
357 * @param[in] args unused
359 * @note DEMAND_ATTACH_FS only
362 FSYNC_salvageThread(void * args)
365 struct fsync_salv_node *node;
370 while (queue_IsEmpty(&fsync_salv.head)) {
371 VOL_CV_WAIT(&fsync_salv.cv);
374 node = queue_First(&fsync_salv.head, fsync_salv_node);
378 if (node->update_salv_prio) {
379 if (VUpdateSalvagePriority_r(vp)) {
380 ViceLog(0, ("FSYNC_salvageThread: unable to raise salvage priority "
381 "for volume %lu\n", afs_printable_uint32_lu(vp->hashid)));
388 VCancelReservation_r(vp);
397 * salvage a volume in the background.
399 * Salvages cannot be scheduled directly from the main FSYNC thread, so
400 * instead call this function to schedule a salvage asynchronously in the
401 * FSYNC_salvageThread thread.
403 * @param[in] vp volume to pointer to salvage
407 * @note DEMAND_ATTACH_FS only
410 FSYNC_backgroundSalvage(Volume *vp)
412 struct fsync_salv_node *node;
415 VCreateReservation_r(vp);
417 node = malloc(sizeof(struct fsync_salv_node));
420 /* Save this value, to know if we should VUpdateSalvagePriority_r.
421 * We need to save it here, snce VRequestSalvage_r will change it. */
422 node->update_salv_prio = vp->salvage.requested;
424 if (VRequestSalvage_r(&ec, vp, SALVSYNC_ERROR, 0)) {
425 ViceLog(0, ("FSYNC_backgroundSalvage: unable to request salvage for volume %lu\n",
426 afs_printable_uint32_lu(vp->hashid)));
429 queue_Append(&fsync_salv.head, node);
430 CV_BROADCAST(&fsync_salv.cv);
432 #endif /* AFS_DEMAND_ATTACH_FS */
435 FSYNC_newconnection(osi_socket afd)
437 #ifdef USE_UNIX_SOCKETS
438 struct sockaddr_un other;
439 #else /* USE_UNIX_SOCKETS */
440 struct sockaddr_in other;
444 junk = sizeof(other);
445 fd = accept(afd, (struct sockaddr *)&other, &junk);
446 if (fd == OSI_NULLSOCKET) {
447 Log("FSYNC_newconnection: accept failed, errno==%d\n", errno);
449 } else if (!AddHandler(fd, FSYNC_com)) {
451 osi_Assert(AddHandler(fd, FSYNC_com));
455 /* this function processes commands from an fssync file descriptor (fd) */
456 afs_int32 FS_cnt = 0;
458 FSYNC_com(osi_socket fd)
462 SYNC_PROTO_BUF_DECL(com_buf);
463 SYNC_PROTO_BUF_DECL(res_buf);
465 memset(&res.hdr, 0, sizeof(res.hdr));
467 com.payload.buf = (void *)com_buf;
468 com.payload.len = SYNC_PROTO_MAX_LEN;
469 res.hdr.response_len = sizeof(res.hdr);
470 res.payload.len = SYNC_PROTO_MAX_LEN;
471 res.payload.buf = (void *)res_buf;
474 if (SYNC_getCom(&fssync_server_state, fd, &com)) {
475 Log("FSYNC_com: read failed; dropping connection (cnt=%d)\n", FS_cnt);
480 if (com.recv_len < sizeof(com.hdr)) {
481 Log("FSSYNC_com: invalid protocol message length (%u)\n", com.recv_len);
482 res.hdr.response = SYNC_COM_ERROR;
483 res.hdr.reason = SYNC_REASON_MALFORMED_PACKET;
484 res.hdr.flags |= SYNC_FLAG_CHANNEL_SHUTDOWN;
488 if (com.hdr.proto_version != FSYNC_PROTO_VERSION) {
489 Log("FSYNC_com: invalid protocol version (%u)\n", com.hdr.proto_version);
490 res.hdr.response = SYNC_COM_ERROR;
491 res.hdr.flags |= SYNC_FLAG_CHANNEL_SHUTDOWN;
495 if (com.hdr.command == SYNC_COM_CHANNEL_CLOSE) {
496 res.hdr.response = SYNC_OK;
497 res.hdr.flags |= SYNC_FLAG_CHANNEL_SHUTDOWN;
499 /* don't respond, just drop; senders of SYNC_COM_CHANNEL_CLOSE
500 * never wait for a response. */
504 ViceLog(125, ("FSYNC_com: from fd %d got command %ld (%s) reason %ld (%s) "
505 "pt %ld (%s) pid %ld\n", (int)fd,
506 afs_printable_int32_ld(com.hdr.command),
507 FSYNC_com2string(com.hdr.command),
508 afs_printable_int32_ld(com.hdr.reason),
509 FSYNC_reason2string(com.hdr.reason),
510 afs_printable_int32_ld(com.hdr.programType),
511 VPTypeToString(com.hdr.programType),
512 afs_printable_int32_ld(com.hdr.pid)));
514 res.hdr.com_seq = com.hdr.com_seq;
517 switch (com.hdr.command) {
519 case FSYNC_VOL_ATTACH:
520 case FSYNC_VOL_LEAVE_OFF:
522 case FSYNC_VOL_FORCE_ERROR:
523 case FSYNC_VOL_LISTVOLUMES:
524 case FSYNC_VOL_NEEDVOLUME:
526 case FSYNC_VOL_BREAKCBKS:
528 case FSYNC_VOL_QUERY:
529 case FSYNC_VOL_QUERY_HDR:
530 case FSYNC_VOL_QUERY_VOP:
531 #ifdef AFS_DEMAND_ATTACH_FS
534 case FSYNC_VG_SCAN_ALL:
536 res.hdr.response = FSYNC_com_VolOp(fd, &com, &res);
538 case FSYNC_VOL_STATS_GENERAL:
539 case FSYNC_VOL_STATS_VICEP:
540 case FSYNC_VOL_STATS_HASH:
541 case FSYNC_VOL_STATS_HDR:
542 case FSYNC_VOL_STATS_VLRU:
543 res.hdr.response = FSYNC_com_StatsOp(fd, &com, &res);
545 case FSYNC_VOL_QUERY_VNODE:
546 res.hdr.response = FSYNC_com_VnQry(fd, &com, &res);
548 #ifdef AFS_DEMAND_ATTACH_FS
551 res.hdr.response = FSYNC_com_VGUpdate(fd, &com, &res);
555 res.hdr.response = SYNC_BAD_COMMAND;
560 ViceLog(125, ("FSYNC_com: fd %d responding with code %ld (%s) reason %ld "
562 afs_printable_int32_ld(res.hdr.response),
563 SYNC_res2string(res.hdr.response),
564 afs_printable_int32_ld(res.hdr.reason),
565 FSYNC_reason2string(res.hdr.reason)));
568 SYNC_putRes(&fssync_server_state, fd, &res);
571 if (res.hdr.flags & SYNC_FLAG_CHANNEL_SHUTDOWN) {
577 FSYNC_com_VolOp(osi_socket fd, SYNC_command * com, SYNC_response * res)
580 afs_int32 code = SYNC_OK;
581 FSSYNC_VolOp_command vcom;
583 if (com->recv_len != (sizeof(com->hdr) + sizeof(FSSYNC_VolOp_hdr))) {
584 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
585 res->hdr.flags |= SYNC_FLAG_CHANNEL_SHUTDOWN;
586 return SYNC_COM_ERROR;
589 vcom.hdr = &com->hdr;
590 vcom.vop = (FSSYNC_VolOp_hdr *) com->payload.buf;
593 vcom.volumes = OfflineVolumes[FindHandler(fd)];
594 for (vcom.v = NULL, i = 0; i < MAXOFFLINEVOLUMES; i++) {
595 if ((vcom.volumes[i].volumeID == vcom.vop->volume) &&
596 (strncmp(vcom.volumes[i].partName, vcom.vop->partName,
597 sizeof(vcom.volumes[i].partName)) == 0)) {
598 vcom.v = &vcom.volumes[i];
603 ViceLog(125, ("FSYNC_com_VolOp: fd %d got command for vol %lu part %.16s\n",
604 (int)fd, afs_printable_uint32_lu(vcom.vop->volume),
605 vcom.vop->partName));
607 switch (com->hdr.command) {
609 case FSYNC_VOL_ATTACH:
610 case FSYNC_VOL_LEAVE_OFF:
611 code = FSYNC_com_VolOn(&vcom, res);
614 case FSYNC_VOL_NEEDVOLUME:
615 code = FSYNC_com_VolOff(&vcom, res);
617 case FSYNC_VOL_LISTVOLUMES:
621 code = FSYNC_com_VolMove(&vcom, res);
623 case FSYNC_VOL_BREAKCBKS:
624 code = FSYNC_com_VolBreakCBKs(&vcom, res);
627 code = FSYNC_com_VolDone(&vcom, res);
629 case FSYNC_VOL_QUERY:
630 code = FSYNC_com_VolQuery(&vcom, res);
632 case FSYNC_VOL_QUERY_HDR:
633 code = FSYNC_com_VolHdrQuery(&vcom, res);
635 #ifdef AFS_DEMAND_ATTACH_FS
636 case FSYNC_VOL_FORCE_ERROR:
637 code = FSYNC_com_VolError(&vcom, res);
639 case FSYNC_VOL_QUERY_VOP:
640 code = FSYNC_com_VolOpQuery(&vcom, res);
643 code = FSYNC_com_VGQuery(&vcom, res);
646 code = FSYNC_com_VGScan(&vcom, res);
648 case FSYNC_VG_SCAN_ALL:
649 code = FSYNC_com_VGScanAll(&vcom, res);
651 #endif /* AFS_DEMAND_ATTACH_FS */
653 code = SYNC_BAD_COMMAND;
660 * service an FSYNC request to bring a volume online.
662 * @param[in] vcom pointer command object
663 * @param[out] res object in which to store response packet
665 * @return operation status
666 * @retval SYNC_OK volume transitioned online
667 * @retval SYNC_FAILED invalid command protocol message
668 * @retval SYNC_DENIED operation could not be completed
670 * @note this is an FSYNC RPC server stub
672 * @note this procedure handles the following FSSYNC command codes:
675 * - FSYNC_VOL_LEAVE_OFF
677 * @note the supplementary reason code contains additional details.
678 * When SYNC_DENIED is returned, the specific reason is
679 * placed in the response packet reason field.
684 FSYNC_com_VolOn(FSSYNC_VolOp_command * vcom, SYNC_response * res)
686 afs_int32 code = SYNC_OK;
687 #ifndef AFS_DEMAND_ATTACH_FS
688 char tvolName[VMAXPATHLEN];
693 if (SYNC_verifyProtocolString(vcom->vop->partName, sizeof(vcom->vop->partName))) {
694 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
699 /* so, we need to attach the volume */
701 #ifdef AFS_DEMAND_ATTACH_FS
702 /* check DAFS permissions */
703 vp = VLookupVolume_r(&error, vcom->vop->volume, NULL);
705 FSYNC_partMatch(vcom, vp, 1) &&
706 vp->pending_vol_op &&
707 (vcom->hdr->programType != vp->pending_vol_op->com.programType)) {
708 /* a different program has this volume checked out. deny. */
709 Log("FSYNC_VolOn: WARNING: program type %u has attempted to manipulate "
710 "state for volume %u using command code %u while the volume is "
711 "checked out by program type %u for command code %u.\n",
712 vcom->hdr->programType,
715 vp->pending_vol_op->com.programType,
716 vp->pending_vol_op->com.command);
718 res->hdr.reason = FSYNC_EXCLUSIVE;
724 vcom->v->volumeID = 0;
727 if (vcom->hdr->command == FSYNC_VOL_LEAVE_OFF) {
728 /* nothing much to do if we're leaving the volume offline */
729 #ifdef AFS_DEMAND_ATTACH_FS
731 if (FSYNC_partMatch(vcom, vp, 1)) {
732 if ((V_attachState(vp) == VOL_STATE_UNATTACHED) ||
733 (V_attachState(vp) == VOL_STATE_PREATTACHED)) {
734 VChangeState_r(vp, VOL_STATE_UNATTACHED);
735 VDeregisterVolOp_r(vp);
738 res->hdr.reason = FSYNC_BAD_STATE;
742 res->hdr.reason = FSYNC_WRONG_PART;
746 res->hdr.reason = FSYNC_UNKNOWN_VOLID;
752 #ifdef AFS_DEMAND_ATTACH_FS
753 /* first, check to see whether we have such a volume defined */
754 vp = VPreAttachVolumeById_r(&error,
758 VDeregisterVolOp_r(vp);
760 #else /* !AFS_DEMAND_ATTACH_FS */
762 snprintf(&tvolName[1], sizeof(tvolName)-1, VFORMAT, afs_printable_uint32_lu(vcom->vop->volume));
763 tvolName[sizeof(tvolName)-1] = '\0';
765 vp = VAttachVolumeByName_r(&error, vcom->vop->partName, tvolName,
771 res->hdr.reason = error;
773 #endif /* !AFS_DEMAND_ATTACH_FS */
780 * service an FSYNC request to take a volume offline.
782 * @param[in] vcom pointer command object
783 * @param[out] res object in which to store response packet
785 * @return operation status
786 * @retval SYNC_OK volume transitioned offline
787 * @retval SYNC_FAILED invalid command protocol message
788 * @retval SYNC_DENIED operation could not be completed
790 * @note this is an FSYNC RPC server stub
792 * @note this procedure handles the following FSSYNC command codes:
794 * - FSYNC_VOL_NEEDVOLUME
796 * @note the supplementary reason code contains additional details.
797 * When SYNC_DENIED is returned, the specific reason is
798 * placed in the response packet reason field.
803 FSYNC_com_VolOff(FSSYNC_VolOp_command * vcom, SYNC_response * res)
805 FSSYNC_VolOp_info info;
806 afs_int32 code = SYNC_OK;
810 #ifdef AFS_DEMAND_ATTACH_FS
811 Volume *nvp, *rvp = NULL;
814 if (SYNC_verifyProtocolString(vcom->vop->partName, sizeof(vcom->vop->partName))) {
815 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
820 /* not already offline, we need to find a slot for newly offline volume */
821 if (vcom->hdr->programType == debugUtility) {
822 /* debug utilities do not have their operations tracked */
826 for (i = 0; i < MAXOFFLINEVOLUMES; i++) {
827 if (vcom->volumes[i].volumeID == 0) {
828 vcom->v = &vcom->volumes[i];
838 FSYNC_com_to_info(vcom, &info);
840 #ifdef AFS_DEMAND_ATTACH_FS
841 vp = VLookupVolume_r(&error, vcom->vop->volume, NULL);
843 vp = VGetVolume_r(&error, vcom->vop->volume);
847 if (!FSYNC_partMatch(vcom, vp, 1)) {
848 /* volume on desired partition is not online, so we
849 * should treat this as an offline volume.
851 #ifndef AFS_DEMAND_ATTACH_FS
859 #ifdef AFS_DEMAND_ATTACH_FS
861 ProgramType type = (ProgramType) vcom->hdr->programType;
863 /* do initial filtering of requests */
865 /* enforce mutual exclusion for volume ops */
866 if (vp->pending_vol_op) {
867 if (vp->pending_vol_op->com.programType != type) {
868 if (vp->pending_vol_op->com.command == FSYNC_VOL_OFF &&
869 vp->pending_vol_op->com.reason == FSYNC_SALVAGE) {
871 Log("denying offline request for volume %lu; volume is salvaging\n",
872 afs_printable_uint32_lu(vp->hashid));
874 res->hdr.reason = FSYNC_SALVAGE;
877 Log("volume %u already checked out\n", vp->hashid);
879 Log("vp->vop = { com = { ver=%u, prog=%d, com=%d, reason=%d, len=%u, flags=0x%x }, vop = { vol=%u, part='%s' } }\n",
880 vp->pending_vol_op->com.proto_version,
881 vp->pending_vol_op->com.programType,
882 vp->pending_vol_op->com.command,
883 vp->pending_vol_op->com.reason,
884 vp->pending_vol_op->com.command_len,
885 vp->pending_vol_op->com.flags,
886 vp->pending_vol_op->vop.volume,
887 vp->pending_vol_op->vop.partName );
888 Log("vcom = { com = { ver=%u, prog=%d, com=%d, reason=%d, len=%u, flags=0x%x } , vop = { vol=%u, part='%s' } }\n",
889 vcom->hdr->proto_version,
890 vcom->hdr->programType,
893 vcom->hdr->command_len,
896 vcom->vop->partName);
897 res->hdr.reason = FSYNC_EXCLUSIVE;
900 Log("warning: volume %u recursively checked out by programType id %d\n",
901 vp->hashid, vcom->hdr->programType);
905 /* wait for exclusive ops, so we have an accurate picture of the
906 * vol attach state */
907 VCreateReservation_r(vp);
908 VWaitExclusiveState_r(vp);
911 /* filter based upon requestor
913 * volume utilities / volserver are not allowed to check out
914 * volumes which are in an error state
916 * unknown utility programs will be denied on principal
920 /* it is possible for the salvageserver to checkout a
921 * volume for salvage before its scheduling request
922 * has been sent to the salvageserver */
923 if (vp->salvage.requested && !vp->salvage.scheduled) {
924 vp->salvage.scheduled = 1;
927 /* If the volume is in VOL_STATE_SALVAGE_REQ, we need to wait
928 * for the vol to go offline before we can give it away. Also
929 * make sure we don't come out with vp in an excl state. */
930 while (V_attachState(vp) == VOL_STATE_SALVAGE_REQ ||
931 VIsExclusiveState(V_attachState(vp))) {
933 VOL_CV_WAIT(&V_attachCV(vp));
941 if (VIsSalvaging(vp)) {
942 Log("denying offline request for volume %lu; volume is in salvaging state\n",
943 afs_printable_uint32_lu(vp->hashid));
944 res->hdr.reason = FSYNC_SALVAGE;
946 /* the volume hasn't been checked out yet by the salvager,
947 * but we think the volume is salvaging; schedule a
948 * a salvage to update the salvage priority */
949 FSYNC_backgroundSalvage(vp);
953 if (VIsErrorState(V_attachState(vp))) {
959 Log("bad program type passed to FSSYNC\n");
963 /* short circuit for offline volume states
964 * so we can avoid I/O penalty of attachment */
965 switch (V_attachState(vp)) {
966 case VOL_STATE_UNATTACHED:
967 case VOL_STATE_PREATTACHED:
968 case VOL_STATE_SALVAGING:
969 case VOL_STATE_ERROR:
970 case VOL_STATE_DELETED:
971 /* register the volume operation metadata with the volume
973 * if the volume is currently pre-attached, attach2()
974 * will evaluate the vol op metadata to determine whether
975 * attaching the volume would be safe */
976 VRegisterVolOp_r(vp, &info);
977 vp->pending_vol_op->vol_op_state = FSSYNC_VolOpRunningUnknown;
983 /* convert to heavyweight ref */
984 nvp = VGetVolumeByVp_r(&error, vp);
987 * It's possible for VGetVolumeByVp_r to have dropped and
988 * re-acquired VOL_LOCK, so volume state may have changed
989 * back to one of the states we tested for above. Since
990 * GetVolume can return NULL in some of those states, just
991 * test for the states again here.
993 switch (V_attachState(vp)) {
994 case VOL_STATE_UNATTACHED:
995 case VOL_STATE_PREATTACHED:
996 case VOL_STATE_SALVAGING:
997 case VOL_STATE_ERROR:
998 case VOL_STATE_DELETED:
999 /* register the volume operation metadata with the volume
1001 * if the volume is currently pre-attached, attach2()
1002 * will evaluate the vol op metadata to determine whether
1003 * attaching the volume would be safe */
1004 VRegisterVolOp_r(vp, &info);
1005 vp->pending_vol_op->vol_op_state = FSSYNC_VolOpRunningUnknown;
1011 Log("FSYNC_com_VolOff: failed to get heavyweight reference to volume %u\n",
1013 res->hdr.reason = FSYNC_VOL_PKG_ERROR;
1015 } else if (nvp != vp) {
1016 /* i don't think this should ever happen, but just in case... */
1017 Log("FSYNC_com_VolOff: warning: potentially dangerous race detected\n");
1021 /* kill off lightweight ref to ensure we can't deadlock against ourselves later... */
1022 VCancelReservation_r(rvp);
1025 /* register the volume operation metadata with the volume */
1026 VRegisterVolOp_r(vp, &info);
1029 #endif /* AFS_DEMAND_ATTACH_FS */
1032 if (VVolOpLeaveOnline_r(vp, &info)) {
1033 VUpdateVolume_r(&error, vp, VOL_UPDATE_WAIT); /* At least get volume stats right */
1035 Log("FSYNC: Volume %u (%s) was left on line for an external %s request\n",
1036 V_id(vp), V_name(vp),
1037 vcom->hdr->reason == V_CLONE ? "clone" :
1038 vcom->hdr->reason == V_READONLY ? "readonly" :
1039 vcom->hdr->reason == V_DUMP ? "dump" :
1040 vcom->hdr->reason == FSYNC_SALVAGE ? "salvage" :
1043 #ifdef AFS_DEMAND_ATTACH_FS
1044 vp->pending_vol_op->vol_op_state = FSSYNC_VolOpRunningOnline;
1048 if (VVolOpSetVBusy_r(vp, &info)) {
1049 vp->specialStatus = VBUSY;
1052 /* remember what volume we got, so we can keep track of how
1053 * many volumes the volserver or whatever is using. Note that
1054 * vp is valid since leaveonline is only set when vp is valid.
1057 vcom->v->volumeID = vcom->vop->volume;
1058 strlcpy(vcom->v->partName, vp->partition->name, sizeof(vcom->v->partName));
1061 #ifdef AFS_DEMAND_ATTACH_FS
1062 VOfflineForVolOp_r(&error, vp, "A volume utility is running.");
1064 osi_Assert(vp->nUsers==0);
1065 vp->pending_vol_op->vol_op_state = FSSYNC_VolOpRunningOffline;
1068 VDeregisterVolOp_r(vp);
1072 VOffline_r(vp, "A volume utility is running.");
1083 #ifdef AFS_DEMAND_ATTACH_FS
1085 VCancelReservation_r(rvp);
1092 * service an FSYNC request to mark a volume as moved.
1094 * @param[in] vcom pointer command object
1095 * @param[out] res object in which to store response packet
1097 * @return operation status
1098 * @retval SYNC_OK volume marked as moved to a remote server
1099 * @retval SYNC_FAILED invalid command protocol message
1100 * @retval SYNC_DENIED current volume state does not permit this operation
1102 * @note this is an FSYNC RPC server stub
1104 * @note this operation also breaks all callbacks for the given volume
1106 * @note this procedure handles the following FSSYNC command codes:
1109 * @note the supplementary reason code contains additional details. For
1110 * instance, SYNC_OK is still returned when the partition specified
1111 * does not match the one registered in the volume object -- reason
1112 * will be FSYNC_WRONG_PART in this case.
1117 FSYNC_com_VolMove(FSSYNC_VolOp_command * vcom, SYNC_response * res)
1119 afs_int32 code = SYNC_DENIED;
1123 if (SYNC_verifyProtocolString(vcom->vop->partName, sizeof(vcom->vop->partName))) {
1124 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
1129 /* Yuch: the "reason" for the move is the site it got moved to... */
1130 /* still set specialStatus so we stop sending back VBUSY.
1131 * also should still break callbacks. Note that I don't know
1132 * how to tell if we should break all or not, so we just do it
1133 * since it doesn't matter much if we do an extra break
1134 * volume callbacks on a volume move within the same server */
1135 #ifdef AFS_DEMAND_ATTACH_FS
1136 vp = VLookupVolume_r(&error, vcom->vop->volume, NULL);
1138 vp = VGetVolume_r(&error, vcom->vop->volume);
1141 if (FSYNC_partMatch(vcom, vp, 1)) {
1142 #ifdef AFS_DEMAND_ATTACH_FS
1143 if ((V_attachState(vp) == VOL_STATE_UNATTACHED) ||
1144 (V_attachState(vp) == VOL_STATE_PREATTACHED)) {
1147 vp->specialStatus = VMOVED;
1148 #ifdef AFS_DEMAND_ATTACH_FS
1150 res->hdr.reason = FSYNC_BAD_STATE;
1154 res->hdr.reason = FSYNC_WRONG_PART;
1156 #ifndef AFS_DEMAND_ATTACH_FS
1158 #endif /* !AFS_DEMAND_ATTACH_FS */
1160 res->hdr.reason = FSYNC_UNKNOWN_VOLID;
1163 if ((code == SYNC_OK) && (V_BreakVolumeCallbacks != NULL)) {
1164 Log("fssync: volume %u moved to %x; breaking all call backs\n",
1165 vcom->vop->volume, vcom->hdr->reason);
1167 (*V_BreakVolumeCallbacks) (vcom->vop->volume);
1177 * service an FSYNC request to mark a volume as destroyed.
1179 * @param[in] vcom pointer command object
1180 * @param[out] res object in which to store response packet
1182 * @return operation status
1183 * @retval SYNC_OK volume marked as destroyed
1184 * @retval SYNC_FAILED invalid command protocol message
1185 * @retval SYNC_DENIED current volume state does not permit this operation
1187 * @note this is an FSYNC RPC server stub
1189 * @note this procedure handles the following FSSYNC command codes:
1192 * @note the supplementary reason code contains additional details. For
1193 * instance, SYNC_OK is still returned when the partition specified
1194 * does not match the one registered in the volume object -- reason
1195 * will be FSYNC_WRONG_PART in this case.
1200 FSYNC_com_VolDone(FSSYNC_VolOp_command * vcom, SYNC_response * res)
1202 afs_int32 code = SYNC_FAILED;
1206 if (SYNC_verifyProtocolString(vcom->vop->partName, sizeof(vcom->vop->partName))) {
1207 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
1211 /* don't try to put online, this call is made only after deleting
1212 * a volume, in which case we want to remove the vol # from the
1213 * OfflineVolumes array only */
1215 vcom->v->volumeID = 0;
1217 vp = VLookupVolume_r(&error, vcom->vop->volume, NULL);
1219 if (FSYNC_partMatch(vcom, vp, 1)) {
1220 #ifdef AFS_DEMAND_ATTACH_FS
1221 if ((V_attachState(vp) == VOL_STATE_UNATTACHED) ||
1222 (V_attachState(vp) == VOL_STATE_PREATTACHED)) {
1224 /* Change state to DELETED, not UNATTACHED, so clients get
1225 * a VNOVOL error when they try to access from now on. */
1227 VChangeState_r(vp, VOL_STATE_DELETED);
1228 VDeregisterVolOp_r(vp);
1230 /* Someday we should free the vp, too, after about 2 hours,
1231 * possibly by putting the vp back on the VLRU. */
1236 res->hdr.reason = FSYNC_BAD_STATE;
1238 #else /* AFS_DEMAND_ATTACH_FS */
1239 if (!vp->specialStatus) {
1240 vp->specialStatus = VNOVOL;
1243 #endif /* !AFS_DEMAND_ATTACH_FS */
1245 code = SYNC_OK; /* XXX is this really a good idea? */
1246 res->hdr.reason = FSYNC_WRONG_PART;
1249 res->hdr.reason = FSYNC_UNKNOWN_VOLID;
1256 #ifdef AFS_DEMAND_ATTACH_FS
1258 * service an FSYNC request to transition a volume to the hard error state.
1260 * @param[in] vcom pointer command object
1261 * @param[out] res object in which to store response packet
1263 * @return operation status
1264 * @retval SYNC_OK volume transitioned to hard error state
1265 * @retval SYNC_FAILED invalid command protocol message
1266 * @retval SYNC_DENIED (see note)
1268 * @note this is an FSYNC RPC server stub
1270 * @note this procedure handles the following FSSYNC command codes:
1271 * - FSYNC_VOL_FORCE_ERROR
1273 * @note SYNC_DENIED is returned in the following cases:
1274 * - no partition name is specified (reason field set to
1275 * FSYNC_WRONG_PART).
1276 * - volume id not known to fileserver (reason field set
1277 * to FSYNC_UNKNOWN_VOLID).
1279 * @note demand attach fileserver only
1284 FSYNC_com_VolError(FSSYNC_VolOp_command * vcom, SYNC_response * res)
1288 afs_int32 code = SYNC_FAILED;
1290 if (SYNC_verifyProtocolString(vcom->vop->partName, sizeof(vcom->vop->partName))) {
1291 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
1295 vp = VLookupVolume_r(&error, vcom->vop->volume, NULL);
1297 if (!vp && vcom->hdr->reason == FSYNC_SALVAGE) {
1298 /* The requested volume doesn't seem to exist. However, it is possible
1299 * that this is triggered by trying to create or clone a volume that
1300 * was prevented from succeeding by a half-created volume in the way.
1301 * (e.g. we tried to create volume X, but volume X exists except that
1302 * its .vol header was deleted for some reason) So, still try to
1303 * a salvage for that volume ID. */
1305 Log("FSYNC_com_VolError: attempting to schedule salvage for unknown "
1306 "volume %lu part %s\n", afs_printable_uint32_lu(vcom->vop->volume),
1307 vcom->vop->partName);
1308 vp = VPreAttachVolumeById_r(&error, vcom->vop->partName,
1313 if (FSYNC_partMatch(vcom, vp, 0)) {
1314 /* null out salvsync control state, as it's no longer relevant */
1315 memset(&vp->salvage, 0, sizeof(vp->salvage));
1316 VDeregisterVolOp_r(vp);
1318 if (vcom->hdr->reason == FSYNC_SALVAGE) {
1319 FSYNC_backgroundSalvage(vp);
1321 VChangeState_r(vp, VOL_STATE_ERROR);
1326 res->hdr.reason = FSYNC_WRONG_PART;
1329 res->hdr.reason = FSYNC_UNKNOWN_VOLID;
1335 #endif /* AFS_DEMAND_ATTACH_FS */
1338 * service an FSYNC request to break all callbacks for this volume.
1340 * @param[in] vcom pointer command object
1341 * @param[out] res object in which to store response packet
1343 * @return operation status
1344 * @retval SYNC_OK callback breaks scheduled for volume
1346 * @note this is an FSYNC RPC server stub
1348 * @note this procedure handles the following FSSYNC command codes:
1349 * - FSYNC_VOL_BREAKCBKS
1351 * @note demand attach fileserver only
1353 * @todo should do partition matching
1358 FSYNC_com_VolBreakCBKs(FSSYNC_VolOp_command * vcom, SYNC_response * res)
1360 /* if the volume is being restored, break all callbacks on it */
1361 if (V_BreakVolumeCallbacks) {
1362 Log("fssync: breaking all call backs for volume %u\n",
1365 (*V_BreakVolumeCallbacks) (vcom->vop->volume);
1372 * service an FSYNC request to return the Volume object.
1374 * @param[in] vcom pointer command object
1375 * @param[out] res object in which to store response packet
1377 * @return operation status
1378 * @retval SYNC_OK volume object returned to caller
1379 * @retval SYNC_FAILED bad command packet, or failed to locate volume object
1381 * @note this is an FSYNC RPC server stub
1383 * @note this procedure handles the following FSSYNC command codes:
1389 FSYNC_com_VolQuery(FSSYNC_VolOp_command * vcom, SYNC_response * res)
1391 afs_int32 code = SYNC_FAILED;
1395 if (SYNC_verifyProtocolString(vcom->vop->partName, sizeof(vcom->vop->partName))) {
1396 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
1400 #ifdef AFS_DEMAND_ATTACH_FS
1401 vp = VLookupVolume_r(&error, vcom->vop->volume, NULL);
1402 #else /* !AFS_DEMAND_ATTACH_FS */
1403 vp = VGetVolume_r(&error, vcom->vop->volume);
1404 #endif /* !AFS_DEMAND_ATTACH_FS */
1407 if (FSYNC_partMatch(vcom, vp, 1)) {
1408 if (res->payload.len >= sizeof(Volume)) {
1409 memcpy(res->payload.buf, vp, sizeof(Volume));
1410 res->hdr.response_len += sizeof(Volume);
1413 res->hdr.reason = SYNC_REASON_PAYLOAD_TOO_BIG;
1416 res->hdr.reason = FSYNC_WRONG_PART;
1418 #ifndef AFS_DEMAND_ATTACH_FS
1422 res->hdr.reason = FSYNC_UNKNOWN_VOLID;
1430 * service an FSYNC request to return the Volume header.
1432 * @param[in] vcom pointer command object
1433 * @param[out] res object in which to store response packet
1435 * @return operation status
1436 * @retval SYNC_OK volume header returned to caller
1437 * @retval SYNC_FAILED bad command packet, or failed to locate volume header
1439 * @note this is an FSYNC RPC server stub
1441 * @note this procedure handles the following FSSYNC command codes:
1442 * - FSYNC_VOL_QUERY_HDR
1447 FSYNC_com_VolHdrQuery(FSSYNC_VolOp_command * vcom, SYNC_response * res)
1449 afs_int32 code = SYNC_FAILED;
1453 if (SYNC_verifyProtocolString(vcom->vop->partName, sizeof(vcom->vop->partName))) {
1454 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
1457 if (res->payload.len < sizeof(VolumeDiskData)) {
1458 res->hdr.reason = SYNC_REASON_PAYLOAD_TOO_BIG;
1462 #ifdef AFS_DEMAND_ATTACH_FS
1463 vp = VLookupVolume_r(&error, vcom->vop->volume, NULL);
1464 #else /* !AFS_DEMAND_ATTACH_FS */
1465 vp = VGetVolume_r(&error, vcom->vop->volume);
1469 if (FSYNC_partMatch(vcom, vp, 1)) {
1470 #ifdef AFS_DEMAND_ATTACH_FS
1471 if ((vp->header == NULL) ||
1472 !(V_attachFlags(vp) & VOL_HDR_ATTACHED) ||
1473 !(V_attachFlags(vp) & VOL_HDR_LOADED)) {
1474 res->hdr.reason = FSYNC_HDR_NOT_ATTACHED;
1477 #else /* !AFS_DEMAND_ATTACH_FS */
1478 if (!vp || !vp->header) {
1479 res->hdr.reason = FSYNC_HDR_NOT_ATTACHED;
1482 #endif /* !AFS_DEMAND_ATTACH_FS */
1484 res->hdr.reason = FSYNC_WRONG_PART;
1488 res->hdr.reason = FSYNC_UNKNOWN_VOLID;
1492 memcpy(res->payload.buf, &V_disk(vp), sizeof(VolumeDiskData));
1493 res->hdr.response_len += sizeof(VolumeDiskData);
1497 #ifndef AFS_DEMAND_ATTACH_FS
1505 #ifdef AFS_DEMAND_ATTACH_FS
1507 FSYNC_com_VolOpQuery(FSSYNC_VolOp_command * vcom, SYNC_response * res)
1509 afs_int32 code = SYNC_OK;
1513 vp = VLookupVolume_r(&error, vcom->vop->volume, NULL);
1515 if (vp && vp->pending_vol_op) {
1516 osi_Assert(sizeof(FSSYNC_VolOp_info) <= res->payload.len);
1517 memcpy(res->payload.buf, vp->pending_vol_op, sizeof(FSSYNC_VolOp_info));
1518 res->hdr.response_len += sizeof(FSSYNC_VolOp_info);
1521 res->hdr.reason = FSYNC_NO_PENDING_VOL_OP;
1523 res->hdr.reason = FSYNC_UNKNOWN_VOLID;
1531 FSYNC_com_VGQuery(FSSYNC_VolOp_command * vcom, SYNC_response * res)
1533 afs_int32 code = SYNC_FAILED;
1535 struct DiskPartition64 * dp;
1537 if (SYNC_verifyProtocolString(vcom->vop->partName, sizeof(vcom->vop->partName))) {
1538 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
1542 dp = VGetPartition_r(vcom->vop->partName, 0);
1544 res->hdr.reason = FSYNC_BAD_PART;
1548 osi_Assert(sizeof(FSSYNC_VGQry_response_t) <= res->payload.len);
1550 rc = VVGCache_query_r(dp, vcom->vop->volume, res->payload.buf);
1553 res->hdr.response_len += sizeof(FSSYNC_VGQry_response_t);
1557 res->hdr.reason = FSYNC_PART_SCANNING;
1560 res->hdr.reason = FSYNC_UNKNOWN_VOLID;
1571 FSYNC_com_VGUpdate(osi_socket fd, SYNC_command * com, SYNC_response * res)
1573 afs_int32 code = SYNC_FAILED;
1574 struct DiskPartition64 * dp;
1575 FSSYNC_VGUpdate_command_t * vgucom;
1578 if (com->recv_len != (sizeof(com->hdr) + sizeof(*vgucom))) {
1579 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
1580 res->hdr.flags |= SYNC_FLAG_CHANNEL_SHUTDOWN;
1581 code = SYNC_COM_ERROR;
1585 vgucom = com->payload.buf;
1587 ViceLog(125, ("FSYNC_com_VGUpdate: fd %d got command for parent %lu child "
1588 "%lu partName %.16s\n", (int)fd,
1589 afs_printable_uint32_lu(vgucom->parent),
1590 afs_printable_uint32_lu(vgucom->child),
1593 if (SYNC_verifyProtocolString(vgucom->partName, sizeof(vgucom->partName))) {
1594 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
1598 dp = VGetPartition_r(vgucom->partName, 0);
1600 res->hdr.reason = FSYNC_BAD_PART;
1604 switch(com->hdr.command) {
1606 rc = VVGCache_entry_add_r(dp, vgucom->parent, vgucom->child, NULL);
1610 rc = VVGCache_entry_del_r(dp, vgucom->parent, vgucom->child);
1614 Log("FSYNC_com_VGUpdate called improperly\n");
1619 /* EINVAL means the partition VGC doesn't exist at all; not really
1621 if (rc == 0 || rc == EINVAL) {
1626 res->hdr.reason = FSYNC_UNKNOWN_VOLID;
1628 res->hdr.reason = FSYNC_WHATEVER;
1636 FSYNC_com_VGScan(FSSYNC_VolOp_command * vcom, SYNC_response * res)
1638 afs_int32 code = SYNC_FAILED;
1639 struct DiskPartition64 * dp;
1641 if (SYNC_verifyProtocolString(vcom->vop->partName, sizeof(vcom->vop->partName))) {
1642 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
1646 dp = VGetPartition_r(vcom->vop->partName, 0);
1648 res->hdr.reason = FSYNC_BAD_PART;
1652 if (VVGCache_scanStart_r(dp) == 0) {
1661 FSYNC_com_VGScanAll(FSSYNC_VolOp_command * com, SYNC_response * res)
1663 afs_int32 code = SYNC_FAILED;
1665 if (VVGCache_scanStart_r(NULL) == 0) {
1671 #endif /* AFS_DEMAND_ATTACH_FS */
1674 FSYNC_com_VnQry(osi_socket fd, SYNC_command * com, SYNC_response * res)
1676 afs_int32 code = SYNC_OK;
1677 FSSYNC_VnQry_hdr * qry = com->payload.buf;
1682 if (com->recv_len != (sizeof(com->hdr) + sizeof(FSSYNC_VnQry_hdr))) {
1683 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
1684 res->hdr.flags |= SYNC_FLAG_CHANNEL_SHUTDOWN;
1685 return SYNC_COM_ERROR;
1688 ViceLog(125, ("FSYNC_com_VnQry: fd %d got command for vol %lu vnode %lu "
1689 "uniq %lu spare %lu partName %.16s\n", (int)fd,
1690 afs_printable_uint32_lu(qry->volume),
1691 afs_printable_uint32_lu(qry->vnode),
1692 afs_printable_uint32_lu(qry->unique),
1693 afs_printable_uint32_lu(qry->spare),
1696 #ifdef AFS_DEMAND_ATTACH_FS
1697 vp = VLookupVolume_r(&error, qry->volume, NULL);
1698 #else /* !AFS_DEMAND_ATTACH_FS */
1699 vp = VGetVolume_r(&error, qry->volume);
1700 #endif /* !AFS_DEMAND_ATTACH_FS */
1703 res->hdr.reason = FSYNC_UNKNOWN_VOLID;
1708 vnp = VLookupVnode(vp, qry->vnode);
1710 res->hdr.reason = FSYNC_UNKNOWN_VNID;
1715 if (Vn_class(vnp)->residentSize > res->payload.len) {
1716 res->hdr.reason = SYNC_REASON_ENCODING_ERROR;
1721 memcpy(res->payload.buf, vnp, Vn_class(vnp)->residentSize);
1722 res->hdr.response_len += Vn_class(vnp)->residentSize;
1725 #ifndef AFS_DEMAND_ATTACH_FS
1734 FSYNC_com_StatsOp(osi_socket fd, SYNC_command * com, SYNC_response * res)
1736 afs_int32 code = SYNC_OK;
1737 FSSYNC_StatsOp_command scom;
1739 if (com->recv_len != (sizeof(com->hdr) + sizeof(FSSYNC_StatsOp_hdr))) {
1740 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
1741 res->hdr.flags |= SYNC_FLAG_CHANNEL_SHUTDOWN;
1742 return SYNC_COM_ERROR;
1745 scom.hdr = &com->hdr;
1746 scom.sop = (FSSYNC_StatsOp_hdr *) com->payload.buf;
1749 ViceLog(125, ("FSYNC_com_StatsOp: fd %d got command for stats: "
1750 "{vlru_generation = %lu, hash_bucket = %lu, partName = "
1751 "%.16s}\n", (int)fd,
1752 afs_printable_uint32_lu(scom.sop->args.vlru_generation),
1753 afs_printable_uint32_lu(scom.sop->args.hash_bucket),
1754 scom.sop->args.partName));
1756 switch (com->hdr.command) {
1757 case FSYNC_VOL_STATS_GENERAL:
1758 code = FSYNC_com_StatsOpGeneral(&scom, res);
1760 #ifdef AFS_DEMAND_ATTACH_FS
1761 /* statistics for the following subsystems are only tracked
1762 * for demand attach fileservers */
1763 case FSYNC_VOL_STATS_VICEP:
1764 code = FSYNC_com_StatsOpViceP(&scom, res);
1766 case FSYNC_VOL_STATS_HASH:
1767 code = FSYNC_com_StatsOpHash(&scom, res);
1769 case FSYNC_VOL_STATS_HDR:
1770 code = FSYNC_com_StatsOpHdr(&scom, res);
1772 case FSYNC_VOL_STATS_VLRU:
1773 code = FSYNC_com_StatsOpVLRU(&scom, res);
1775 #endif /* AFS_DEMAND_ATTACH_FS */
1777 code = SYNC_BAD_COMMAND;
1784 FSYNC_com_StatsOpGeneral(FSSYNC_StatsOp_command * scom, SYNC_response * res)
1786 afs_int32 code = SYNC_OK;
1788 memcpy(res->payload.buf, &VStats, sizeof(VStats));
1789 res->hdr.response_len += sizeof(VStats);
1794 #ifdef AFS_DEMAND_ATTACH_FS
1796 FSYNC_com_StatsOpViceP(FSSYNC_StatsOp_command * scom, SYNC_response * res)
1798 afs_int32 code = SYNC_OK;
1799 struct DiskPartition64 * dp;
1800 struct DiskPartitionStats64 * stats;
1802 if (SYNC_verifyProtocolString(scom->sop->args.partName, sizeof(scom->sop->args.partName))) {
1803 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
1808 dp = VGetPartition_r(scom->sop->args.partName, 0);
1812 stats = (struct DiskPartitionStats64 *) res->payload.buf;
1813 stats->free = dp->free;
1814 stats->totalUsable = dp->totalUsable;
1815 stats->minFree = dp->minFree;
1816 stats->f_files = dp->f_files;
1817 stats->vol_list_len = dp->vol_list.len;
1819 res->hdr.response_len += sizeof(struct DiskPartitionStats64);
1827 FSYNC_com_StatsOpHash(FSSYNC_StatsOp_command * scom, SYNC_response * res)
1829 afs_int32 code = SYNC_OK;
1830 struct VolumeHashChainStats * stats;
1831 struct VolumeHashChainHead * head;
1833 if (scom->sop->args.hash_bucket >= VolumeHashTable.Size) {
1837 head = &VolumeHashTable.Table[scom->sop->args.hash_bucket];
1838 stats = (struct VolumeHashChainStats *) res->payload.buf;
1839 stats->table_size = VolumeHashTable.Size;
1840 stats->chain_len = head->len;
1841 stats->chain_cacheCheck = head->cacheCheck;
1842 stats->chain_busy = head->busy;
1843 AssignInt64(head->looks, &stats->chain_looks);
1844 AssignInt64(head->gets, &stats->chain_gets);
1845 AssignInt64(head->reorders, &stats->chain_reorders);
1847 res->hdr.response_len += sizeof(struct VolumeHashChainStats);
1853 FSYNC_com_StatsOpHdr(FSSYNC_StatsOp_command * scom, SYNC_response * res)
1855 afs_int32 code = SYNC_OK;
1857 memcpy(res->payload.buf, &volume_hdr_LRU.stats, sizeof(volume_hdr_LRU.stats));
1858 res->hdr.response_len += sizeof(volume_hdr_LRU.stats);
1864 FSYNC_com_StatsOpVLRU(FSSYNC_StatsOp_command * scom, SYNC_response * res)
1866 afs_int32 code = SYNC_OK;
1868 code = SYNC_BAD_COMMAND;
1872 #endif /* AFS_DEMAND_ATTACH_FS */
1875 * populate an FSSYNC_VolOp_info object from a command packet object.
1877 * @param[in] vcom pointer to command packet
1878 * @param[out] info pointer to info object which will be populated
1880 * @note FSSYNC_VolOp_info objects are attached to Volume objects when
1881 * a volume operation is commenced.
1886 FSYNC_com_to_info(FSSYNC_VolOp_command * vcom, FSSYNC_VolOp_info * info)
1888 memcpy(&info->com, vcom->hdr, sizeof(SYNC_command_hdr));
1889 memcpy(&info->vop, vcom->vop, sizeof(FSSYNC_VolOp_hdr));
1890 info->vol_op_state = FSSYNC_VolOpPending;
1894 * check whether command packet partition name matches volume
1895 * object's partition name.
1897 * @param[in] vcom pointer to command packet
1898 * @param[in] vp pointer to volume object
1899 * @param[in] match_anon anon matching control flag (see note below)
1901 * @return whether partitions match
1902 * @retval 0 partitions do NOT match
1903 * @retval 1 partitions match
1905 * @note if match_anon is non-zero, then this function will return a
1906 * positive match for a zero-length partition string in the
1912 FSYNC_partMatch(FSSYNC_VolOp_command * vcom, Volume * vp, int match_anon)
1914 return ((match_anon && vcom->vop->partName[0] == 0) ||
1915 (strncmp(vcom->vop->partName, V_partition(vp)->name,
1916 sizeof(vcom->vop->partName)) == 0));
1921 FSYNC_Drop(osi_socket fd)
1923 struct offlineInfo *p;
1926 char tvolName[VMAXPATHLEN];
1929 p = OfflineVolumes[FindHandler(fd)];
1930 for (i = 0; i < MAXOFFLINEVOLUMES; i++) {
1931 if (p[i].volumeID) {
1936 sprintf(&tvolName[1], VFORMAT, afs_printable_uint32_lu(p[i].volumeID));
1937 vp = VAttachVolumeByName_r(&error, p[i].partName, tvolName,
1954 static int AcceptHandler = -1; /* handler id for accept, if turned on */
1959 if (AcceptHandler == -1) {
1960 osi_Assert(AddHandler(fssync_server_state.fd, FSYNC_newconnection));
1961 AcceptHandler = FindHandler(fssync_server_state.fd);
1968 if (AcceptHandler != -1) {
1969 osi_Assert(RemoveHandler(fssync_server_state.fd));
1974 /* The multiple FD handling code. */
1976 static osi_socket HandlerFD[MAXHANDLERS];
1977 static void (*HandlerProc[MAXHANDLERS]) (osi_socket);
1983 ObtainWriteLock(&FSYNC_handler_lock);
1984 for (i = 0; i < MAXHANDLERS; i++) {
1985 HandlerFD[i] = OSI_NULLSOCKET;
1988 ReleaseWriteLock(&FSYNC_handler_lock);
1991 #if defined(HAVE_POLL) && defined(AFS_PTHREAD_ENV)
1993 CallHandler(struct pollfd *fds, int nfds, int mask)
1997 ObtainReadLock(&FSYNC_handler_lock);
1998 for (i = 0; i < nfds; i++) {
1999 if (fds[i].revents & mask) {
2000 handler = FindHandler_r(fds[i].fd);
2001 ReleaseReadLock(&FSYNC_handler_lock);
2002 (*HandlerProc[handler]) (fds[i].fd);
2003 ObtainReadLock(&FSYNC_handler_lock);
2006 ReleaseReadLock(&FSYNC_handler_lock);
2010 CallHandler(fd_set * fdsetp)
2013 ObtainReadLock(&FSYNC_handler_lock);
2014 for (i = 0; i < MAXHANDLERS; i++) {
2015 if (HandlerFD[i] >= 0 && FD_ISSET(HandlerFD[i], fdsetp)) {
2016 ReleaseReadLock(&FSYNC_handler_lock);
2017 (*HandlerProc[i]) (HandlerFD[i]);
2018 ObtainReadLock(&FSYNC_handler_lock);
2021 ReleaseReadLock(&FSYNC_handler_lock);
2026 AddHandler(osi_socket afd, void (*aproc) (osi_socket))
2029 ObtainWriteLock(&FSYNC_handler_lock);
2030 for (i = 0; i < MAXHANDLERS; i++)
2031 if (HandlerFD[i] == OSI_NULLSOCKET)
2033 if (i >= MAXHANDLERS) {
2034 ReleaseWriteLock(&FSYNC_handler_lock);
2038 HandlerProc[i] = aproc;
2039 ReleaseWriteLock(&FSYNC_handler_lock);
2044 FindHandler(osi_socket afd)
2047 ObtainReadLock(&FSYNC_handler_lock);
2048 for (i = 0; i < MAXHANDLERS; i++)
2049 if (HandlerFD[i] == afd) {
2050 ReleaseReadLock(&FSYNC_handler_lock);
2053 ReleaseReadLock(&FSYNC_handler_lock); /* just in case */
2055 return -1; /* satisfy compiler */
2059 FindHandler_r(osi_socket afd)
2062 for (i = 0; i < MAXHANDLERS; i++)
2063 if (HandlerFD[i] == afd) {
2067 return -1; /* satisfy compiler */
2071 RemoveHandler(osi_socket afd)
2073 ObtainWriteLock(&FSYNC_handler_lock);
2074 HandlerFD[FindHandler_r(afd)] = OSI_NULLSOCKET;
2075 ReleaseWriteLock(&FSYNC_handler_lock);
2079 #if defined(HAVE_POLL) && defined(AFS_PTHREAD_ENV)
2081 GetHandler(struct pollfd *fds, int maxfds, int events, int *nfds)
2085 ObtainReadLock(&FSYNC_handler_lock);
2086 for (i = 0; i < MAXHANDLERS; i++)
2087 if (HandlerFD[i] != OSI_NULLSOCKET) {
2088 osi_Assert(fdi<maxfds);
2089 fds[fdi].fd = HandlerFD[i];
2090 fds[fdi].events = events;
2091 fds[fdi].revents = 0;
2095 ReleaseReadLock(&FSYNC_handler_lock);
2099 GetHandler(fd_set * fdsetp, int *maxfdp)
2104 ObtainReadLock(&FSYNC_handler_lock); /* just in case */
2105 for (i = 0; i < MAXHANDLERS; i++)
2106 if (HandlerFD[i] != OSI_NULLSOCKET) {
2107 FD_SET(HandlerFD[i], fdsetp);
2108 #ifndef AFS_NT40_ENV
2109 /* On Windows the nfds parameter to select() is ignored */
2110 if (maxfd < HandlerFD[i] || maxfd == (int)-1)
2111 maxfd = HandlerFD[i];
2112 #endif /* AFS_NT40_ENV */
2115 ReleaseReadLock(&FSYNC_handler_lock); /* just in case */
2117 #endif /* HAVE_POLL && AFS_PTHREAD_ENV */
2119 #endif /* FSSYNC_BUILD_SERVER */