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>
49 #ifdef AFS_PTHREAD_ENV
50 # include <opr/lock.h>
52 #include <afs/afsint.h>
53 #include <rx/rx_queue.h>
55 #include <afs/errors.h>
56 #include "daemon_com.h"
57 #include "daemon_com_inline.h"
59 #include "fssync_inline.h"
63 #include <afs/afssyscalls.h>
67 #include "volume_inline.h"
68 #include "partition.h"
74 #endif /* HAVE_POLL */
76 #ifdef USE_UNIX_SOCKETS
78 #include <afs/afsutil.h>
79 #endif /* USE_UNIX_SOCKETS */
81 #ifdef FSSYNC_BUILD_SERVER
82 #define MAXHANDLERS 4 /* Up to 4 clients; must be at least 2, so that
83 * move = dump+restore can run on single server */
84 #define MAXOFFLINEVOLUMES 128 /* This needs to be as big as the maximum
85 * number that would be offline for 1 operation.
86 * Current winner is salvage, which needs all
87 * cloned read-only copies offline when salvaging
88 * a single read-write volume */
92 static struct offlineInfo OfflineVolumes[MAXHANDLERS][MAXOFFLINEVOLUMES];
95 * fssync server socket handle.
97 static SYNC_server_state_t fssync_server_state =
98 { OSI_NULLSOCKET, /* file descriptor */
99 FSSYNC_ENDPOINT_DECL, /* server endpoint */
100 FSYNC_PROTO_VERSION, /* protocol version */
101 5, /* bind() retry limit */
102 100, /* listen() queue depth */
103 "FSSYNC", /* protocol name string */
106 #ifdef AFS_DEMAND_ATTACH_FS
108 * a queue of volume pointers to salvage in the background.
110 struct fsync_salv_node {
112 Volume *vp; /**< volume to salvage */
113 unsigned char update_salv_prio; /**< whether we should update the salvage priority or not */
116 struct rx_queue head;
120 static void * FSYNC_salvageThread(void *);
121 static void FSYNC_backgroundSalvage(Volume *vp);
122 #endif /* AFS_DEMAND_ATTACH_FS */
124 /* Forward declarations */
125 static void * FSYNC_sync(void *);
126 static void FSYNC_newconnection(osi_socket afd);
127 static void FSYNC_com(osi_socket fd);
128 static void FSYNC_Drop(osi_socket fd);
129 static void AcceptOn(void);
130 static void AcceptOff(void);
131 static void InitHandler(void);
132 static int AddHandler(osi_socket fd, void (*aproc)(osi_socket));
133 static int FindHandler(osi_socket afd);
134 static int FindHandler_r(osi_socket afd);
135 static int RemoveHandler(osi_socket afd);
136 #if defined(HAVE_POLL) && defined (AFS_PTHREAD_ENV)
137 static void CallHandler(struct pollfd *fds, int nfds, int mask);
138 static void GetHandler(struct pollfd *fds, int maxfds, int events, int *nfds);
140 static void CallHandler(fd_set * fdsetp);
141 static void GetHandler(fd_set * fdsetp, int *maxfdp);
144 static afs_int32 FSYNC_com_VolOp(osi_socket fd, SYNC_command * com, SYNC_response * res);
146 #ifdef AFS_DEMAND_ATTACH_FS
147 static afs_int32 FSYNC_com_VolError(FSSYNC_VolOp_command * com, SYNC_response * res);
149 static afs_int32 FSYNC_com_VolOn(FSSYNC_VolOp_command * com, SYNC_response * res);
150 static afs_int32 FSYNC_com_VolOff(FSSYNC_VolOp_command * com, SYNC_response * res);
151 static afs_int32 FSYNC_com_VolMove(FSSYNC_VolOp_command * com, SYNC_response * res);
152 static afs_int32 FSYNC_com_VolBreakCBKs(FSSYNC_VolOp_command * com, SYNC_response * res);
153 static afs_int32 FSYNC_com_VolDone(FSSYNC_VolOp_command * com, SYNC_response * res);
154 static afs_int32 FSYNC_com_VolQuery(FSSYNC_VolOp_command * com, SYNC_response * res);
155 static afs_int32 FSYNC_com_VolHdrQuery(FSSYNC_VolOp_command * com, SYNC_response * res);
156 #ifdef AFS_DEMAND_ATTACH_FS
157 static afs_int32 FSYNC_com_VGUpdate(osi_socket fd, SYNC_command * com, SYNC_response * res);
158 static afs_int32 FSYNC_com_VolOpQuery(FSSYNC_VolOp_command * com, SYNC_response * res);
159 static afs_int32 FSYNC_com_VGQuery(FSSYNC_VolOp_command * com, SYNC_response * res);
160 static afs_int32 FSYNC_com_VGScan(FSSYNC_VolOp_command * com, SYNC_response * res);
161 static afs_int32 FSYNC_com_VGScanAll(FSSYNC_VolOp_command * com, SYNC_response * res);
162 #endif /* AFS_DEMAND_ATTACH_FS */
164 static afs_int32 FSYNC_com_VnQry(osi_socket fd, SYNC_command * com, SYNC_response * res);
166 static afs_int32 FSYNC_com_StatsOp(osi_socket fd, SYNC_command * com, SYNC_response * res);
168 static afs_int32 FSYNC_com_StatsOpGeneral(FSSYNC_StatsOp_command * scom, SYNC_response * res);
170 #ifdef AFS_DEMAND_ATTACH_FS
171 static afs_int32 FSYNC_com_StatsOpViceP(FSSYNC_StatsOp_command * scom, SYNC_response * res);
172 static afs_int32 FSYNC_com_StatsOpHash(FSSYNC_StatsOp_command * scom, SYNC_response * res);
173 static afs_int32 FSYNC_com_StatsOpHdr(FSSYNC_StatsOp_command * scom, SYNC_response * res);
174 static afs_int32 FSYNC_com_StatsOpVLRU(FSSYNC_StatsOp_command * scom, SYNC_response * res);
177 static void FSYNC_com_to_info(FSSYNC_VolOp_command * vcom, FSSYNC_VolOp_info * info);
179 static int FSYNC_partMatch(FSSYNC_VolOp_command * vcom, Volume * vp, int match_anon);
183 * This lock controls access to the handler array. The overhead
184 * is minimal in non-preemptive environments.
186 struct Lock FSYNC_handler_lock;
191 #ifdef AFS_PTHREAD_ENV
193 pthread_attr_t tattr;
194 #else /* AFS_PTHREAD_ENV */
196 #endif /* AFS_PTHREAD_ENV */
198 Lock_Init(&FSYNC_handler_lock);
200 #ifdef AFS_PTHREAD_ENV
201 opr_Verify(pthread_attr_init(&tattr) == 0);
202 opr_Verify(pthread_attr_setdetachstate(&tattr,
203 PTHREAD_CREATE_DETACHED) == 0);
204 opr_Verify(pthread_create(&tid, &tattr, FSYNC_sync, NULL) == 0);
205 #else /* AFS_PTHREAD_ENV */
206 opr_Verify(LWP_CreateProcess(FSYNC_sync, USUAL_STACK_SIZE,
207 USUAL_PRIORITY, NULL,
208 "FSYNC_sync", &pid) == LWP_SUCCESS);
209 #endif /* AFS_PTHREAD_ENV */
211 #ifdef AFS_DEMAND_ATTACH_FS
212 queue_Init(&fsync_salv.head);
213 opr_cv_init(&fsync_salv.cv);
214 opr_Verify(pthread_create(&tid, &tattr, FSYNC_salvageThread, NULL) == 0);
215 #endif /* AFS_DEMAND_ATTACH_FS */
218 #if defined(HAVE_POLL) && defined(AFS_PTHREAD_ENV)
219 static struct pollfd FSYNC_readfds[MAXHANDLERS];
221 static fd_set FSYNC_readfds;
226 FSYNC_sync(void * args)
230 #ifdef AFS_PTHREAD_ENV
233 SYNC_server_state_t * state = &fssync_server_state;
234 #ifdef AFS_DEMAND_ATTACH_FS
235 VThreadOptions_t * thread_opts;
239 * For non-DAFS, only wait until we begin attaching volumes (instead
240 * of waiting until all volumes are attached), since it can take
241 * awhile until VInit == 2.
244 #endif /* AFS_DEMAND_ATTACH_FS */
246 /* we must not be called before vol package initialization, since we use
247 * vol package mutexes and conds etc */
250 SYNC_getAddr(&state->endpoint, &state->addr);
251 SYNC_cleanupSock(state);
254 (void)signal(SIGPIPE, SIG_IGN);
257 #ifdef AFS_PTHREAD_ENV
258 /* set our 'thread-id' so that the host hold table works */
259 tid = rx_SetThreadNum();
260 Log("Set thread id %d for FSYNC_sync\n", tid);
261 opr_threadname_set("FSYNC_sync");
262 #endif /* AFS_PTHREAD_ENV */
266 while (VInit < min_vinit) {
267 /* Let somebody else run until all volumes have been preattached
268 * (DAFS), or we have started attaching volumes (non-DAFS). This
269 * doesn't mean that all volumes have been attached.
271 #ifdef AFS_PTHREAD_ENV
272 VOL_CV_WAIT(&vol_vinit_cond);
273 #else /* AFS_PTHREAD_ENV */
274 LWP_DispatchProcess();
275 #endif /* AFS_PTHREAD_ENV */
280 state->fd = SYNC_getSock(&state->endpoint);
281 code = SYNC_bindSock(state);
284 #ifdef AFS_DEMAND_ATTACH_FS
286 * make sure the volume package is incapable of recursively executing
287 * salvsync calls on this thread, since there is a possibility of
290 thread_opts = malloc(sizeof(VThreadOptions_t));
291 if (thread_opts == NULL) {
292 Log("failed to allocate memory for thread-specific volume package options structure\n");
295 memcpy(thread_opts, &VThread_defaults, sizeof(VThread_defaults));
296 thread_opts->disallow_salvsync = 1;
297 opr_Verify(pthread_setspecific(VThread_key, thread_opts) == 0);
299 code = VVGCache_PkgInit();
300 opr_Assert(code == 0);
307 #if defined(HAVE_POLL) && defined(AFS_PTHREAD_ENV)
309 GetHandler(FSYNC_readfds, MAXHANDLERS, POLLIN|POLLPRI, &nfds);
310 if (poll(FSYNC_readfds, nfds, -1) >=1)
311 CallHandler(FSYNC_readfds, nfds, POLLIN|POLLPRI);
314 #ifdef AFS_PTHREAD_ENV
315 struct timeval s_timeout;
317 GetHandler(&FSYNC_readfds, &maxfd);
318 /* Note: check for >= 1 below is essential since IOMGR_select
319 * doesn't have exactly same semantics as select.
321 #ifdef AFS_PTHREAD_ENV
322 s_timeout.tv_sec = SYNC_SELECT_TIMEOUT;
323 s_timeout.tv_usec = 0;
324 if (select(maxfd + 1, &FSYNC_readfds, NULL, NULL, &s_timeout) >= 1)
325 #else /* AFS_PTHREAD_ENV */
326 if (IOMGR_Select(maxfd + 1, &FSYNC_readfds, NULL, NULL, NULL) >= 1)
327 #endif /* AFS_PTHREAD_ENV */
328 CallHandler(&FSYNC_readfds);
331 AFS_UNREACHED(return(NULL)); /* hush now, little gcc */
334 #ifdef AFS_DEMAND_ATTACH_FS
336 * thread for salvaging volumes in the background.
338 * Since FSSYNC handlers cannot issue SALVSYNC requests in order to avoid
339 * deadlock issues, this thread exists so code in the FSSYNC handler thread
340 * can hand off volumes to be salvaged in the background.
342 * @param[in] args unused
344 * @note DEMAND_ATTACH_FS only
347 FSYNC_salvageThread(void * args)
350 struct fsync_salv_node *node;
355 while (queue_IsEmpty(&fsync_salv.head)) {
356 VOL_CV_WAIT(&fsync_salv.cv);
359 node = queue_First(&fsync_salv.head, fsync_salv_node);
363 if (node->update_salv_prio) {
364 if (VUpdateSalvagePriority_r(vp)) {
365 ViceLog(0, ("FSYNC_salvageThread: unable to raise salvage priority "
366 "for volume %" AFS_VOLID_FMT "\n", afs_printable_VolumeId_lu(vp->hashid)));
373 VCancelReservation_r(vp);
376 AFS_UNREACHED(VOL_UNLOCK);
377 AFS_UNREACHED(return(NULL));
381 * salvage a volume in the background.
383 * Salvages cannot be scheduled directly from the main FSYNC thread, so
384 * instead call this function to schedule a salvage asynchronously in the
385 * FSYNC_salvageThread thread.
387 * @param[in] vp volume to pointer to salvage
391 * @note DEMAND_ATTACH_FS only
394 FSYNC_backgroundSalvage(Volume *vp)
396 struct fsync_salv_node *node;
399 VCreateReservation_r(vp);
401 node = malloc(sizeof(struct fsync_salv_node));
404 /* Save this value, to know if we should VUpdateSalvagePriority_r.
405 * We need to save it here, snce VRequestSalvage_r will change it. */
406 node->update_salv_prio = vp->salvage.requested;
408 if (VRequestSalvage_r(&ec, vp, SALVSYNC_ERROR, 0)) {
409 ViceLog(0, ("FSYNC_backgroundSalvage: unable to request salvage for volume %" AFS_VOLID_FMT "\n",
410 afs_printable_VolumeId_lu(vp->hashid)));
413 queue_Append(&fsync_salv.head, node);
414 opr_cv_broadcast(&fsync_salv.cv);
416 #endif /* AFS_DEMAND_ATTACH_FS */
419 FSYNC_newconnection(osi_socket afd)
421 #ifdef USE_UNIX_SOCKETS
422 struct sockaddr_un other;
423 #else /* USE_UNIX_SOCKETS */
424 struct sockaddr_in other;
428 junk = sizeof(other);
429 fd = accept(afd, (struct sockaddr *)&other, &junk);
430 if (fd == OSI_NULLSOCKET) {
431 Log("FSYNC_newconnection: accept failed, errno==%d\n", errno);
433 } else if (!AddHandler(fd, FSYNC_com)) {
435 opr_Verify(AddHandler(fd, FSYNC_com));
439 /* this function processes commands from an fssync file descriptor (fd) */
440 afs_int32 FS_cnt = 0;
442 FSYNC_com(osi_socket fd)
446 SYNC_PROTO_BUF_DECL(com_buf);
447 SYNC_PROTO_BUF_DECL(res_buf);
449 memset(&res.hdr, 0, sizeof(res.hdr));
451 com.payload.buf = (void *)com_buf;
452 com.payload.len = SYNC_PROTO_MAX_LEN;
453 res.hdr.response_len = sizeof(res.hdr);
454 res.payload.len = SYNC_PROTO_MAX_LEN;
455 res.payload.buf = (void *)res_buf;
458 if (SYNC_getCom(&fssync_server_state, fd, &com)) {
459 Log("FSYNC_com: read failed; dropping connection (cnt=%d)\n", FS_cnt);
464 if (com.recv_len < sizeof(com.hdr)) {
465 Log("FSSYNC_com: invalid protocol message length (%u)\n", com.recv_len);
466 res.hdr.response = SYNC_COM_ERROR;
467 res.hdr.reason = SYNC_REASON_MALFORMED_PACKET;
468 res.hdr.flags |= SYNC_FLAG_CHANNEL_SHUTDOWN;
472 if (com.hdr.proto_version != FSYNC_PROTO_VERSION) {
473 Log("FSYNC_com: invalid protocol version (%u)\n", com.hdr.proto_version);
474 res.hdr.response = SYNC_COM_ERROR;
475 res.hdr.flags |= SYNC_FLAG_CHANNEL_SHUTDOWN;
479 if (com.hdr.command == SYNC_COM_CHANNEL_CLOSE) {
480 res.hdr.response = SYNC_OK;
481 res.hdr.flags |= SYNC_FLAG_CHANNEL_SHUTDOWN;
483 /* don't respond, just drop; senders of SYNC_COM_CHANNEL_CLOSE
484 * never wait for a response. */
488 ViceLog(125, ("FSYNC_com: from fd %d got command %ld (%s) reason %ld (%s) "
489 "pt %ld (%s) pid %ld\n", (int)fd,
490 afs_printable_int32_ld(com.hdr.command),
491 FSYNC_com2string(com.hdr.command),
492 afs_printable_int32_ld(com.hdr.reason),
493 FSYNC_reason2string(com.hdr.reason),
494 afs_printable_int32_ld(com.hdr.programType),
495 VPTypeToString(com.hdr.programType),
496 afs_printable_int32_ld(com.hdr.pid)));
498 res.hdr.com_seq = com.hdr.com_seq;
501 switch (com.hdr.command) {
503 case FSYNC_VOL_ATTACH:
504 case FSYNC_VOL_LEAVE_OFF:
506 case FSYNC_VOL_FORCE_ERROR:
507 case FSYNC_VOL_LISTVOLUMES:
508 case FSYNC_VOL_NEEDVOLUME:
510 case FSYNC_VOL_BREAKCBKS:
512 case FSYNC_VOL_QUERY:
513 case FSYNC_VOL_QUERY_HDR:
514 #ifdef AFS_DEMAND_ATTACH_FS
515 case FSYNC_VOL_QUERY_VOP:
518 case FSYNC_VG_SCAN_ALL:
520 res.hdr.response = FSYNC_com_VolOp(fd, &com, &res);
522 case FSYNC_VOL_STATS_GENERAL:
523 case FSYNC_VOL_STATS_VICEP:
524 case FSYNC_VOL_STATS_HASH:
525 case FSYNC_VOL_STATS_HDR:
526 case FSYNC_VOL_STATS_VLRU:
527 res.hdr.response = FSYNC_com_StatsOp(fd, &com, &res);
529 case FSYNC_VOL_QUERY_VNODE:
530 res.hdr.response = FSYNC_com_VnQry(fd, &com, &res);
532 #ifdef AFS_DEMAND_ATTACH_FS
535 res.hdr.response = FSYNC_com_VGUpdate(fd, &com, &res);
539 res.hdr.response = SYNC_BAD_COMMAND;
544 ViceLog(125, ("FSYNC_com: fd %d responding with code %ld (%s) reason %ld "
546 afs_printable_int32_ld(res.hdr.response),
547 SYNC_res2string(res.hdr.response),
548 afs_printable_int32_ld(res.hdr.reason),
549 FSYNC_reason2string(res.hdr.reason)));
552 SYNC_putRes(&fssync_server_state, fd, &res);
555 if (res.hdr.flags & SYNC_FLAG_CHANNEL_SHUTDOWN) {
561 FSYNC_com_VolOp(osi_socket fd, SYNC_command * com, SYNC_response * res)
564 afs_int32 code = SYNC_OK;
565 FSSYNC_VolOp_command vcom;
567 if (com->recv_len != (sizeof(com->hdr) + sizeof(FSSYNC_VolOp_hdr))) {
568 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
569 res->hdr.flags |= SYNC_FLAG_CHANNEL_SHUTDOWN;
570 return SYNC_COM_ERROR;
573 vcom.hdr = &com->hdr;
574 vcom.vop = (FSSYNC_VolOp_hdr *) com->payload.buf;
577 vcom.volumes = OfflineVolumes[FindHandler(fd)];
578 for (vcom.v = NULL, i = 0; i < MAXOFFLINEVOLUMES; i++) {
579 if ((vcom.volumes[i].volumeID == vcom.vop->volume) &&
580 (strncmp(vcom.volumes[i].partName, vcom.vop->partName,
581 sizeof(vcom.volumes[i].partName)) == 0)) {
582 vcom.v = &vcom.volumes[i];
587 ViceLog(125, ("FSYNC_com_VolOp: fd %d got command for vol %lu part %.16s\n",
588 (int)fd, afs_printable_uint32_lu(vcom.vop->volume),
589 vcom.vop->partName));
591 switch (com->hdr.command) {
593 case FSYNC_VOL_ATTACH:
594 case FSYNC_VOL_LEAVE_OFF:
595 code = FSYNC_com_VolOn(&vcom, res);
598 case FSYNC_VOL_NEEDVOLUME:
599 code = FSYNC_com_VolOff(&vcom, res);
601 case FSYNC_VOL_LISTVOLUMES:
605 code = FSYNC_com_VolMove(&vcom, res);
607 case FSYNC_VOL_BREAKCBKS:
608 code = FSYNC_com_VolBreakCBKs(&vcom, res);
611 code = FSYNC_com_VolDone(&vcom, res);
613 case FSYNC_VOL_QUERY:
614 code = FSYNC_com_VolQuery(&vcom, res);
616 case FSYNC_VOL_QUERY_HDR:
617 code = FSYNC_com_VolHdrQuery(&vcom, res);
619 #ifdef AFS_DEMAND_ATTACH_FS
620 case FSYNC_VOL_FORCE_ERROR:
621 code = FSYNC_com_VolError(&vcom, res);
623 case FSYNC_VOL_QUERY_VOP:
624 code = FSYNC_com_VolOpQuery(&vcom, res);
627 code = FSYNC_com_VGQuery(&vcom, res);
630 code = FSYNC_com_VGScan(&vcom, res);
632 case FSYNC_VG_SCAN_ALL:
633 code = FSYNC_com_VGScanAll(&vcom, res);
635 #endif /* AFS_DEMAND_ATTACH_FS */
637 code = SYNC_BAD_COMMAND;
644 * service an FSYNC request to bring a volume online.
646 * @param[in] vcom pointer command object
647 * @param[out] res object in which to store response packet
649 * @return operation status
650 * @retval SYNC_OK volume transitioned online
651 * @retval SYNC_FAILED invalid command protocol message
652 * @retval SYNC_DENIED operation could not be completed
654 * @note this is an FSYNC RPC server stub
656 * @note this procedure handles the following FSSYNC command codes:
659 * - FSYNC_VOL_LEAVE_OFF
661 * @note the supplementary reason code contains additional details.
662 * When SYNC_DENIED is returned, the specific reason is
663 * placed in the response packet reason field.
668 FSYNC_com_VolOn(FSSYNC_VolOp_command * vcom, SYNC_response * res)
670 afs_int32 code = SYNC_OK;
671 #ifndef AFS_DEMAND_ATTACH_FS
672 char tvolName[VMAXPATHLEN];
677 /* Verify the partition name is null terminated. */
678 if (SYNC_verifyProtocolString(vcom->vop->partName, sizeof(vcom->vop->partName))) {
679 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
684 /* so, we need to attach the volume */
686 #ifdef AFS_DEMAND_ATTACH_FS
687 /* Verify the partition name is not empty. */
688 if (*vcom->vop->partName == 0) {
689 res->hdr.reason = FSYNC_BAD_PART;
694 /* check DAFS permissions */
695 vp = VLookupVolume_r(&error, vcom->vop->volume, NULL);
697 FSYNC_partMatch(vcom, vp, 1) &&
698 vp->pending_vol_op &&
699 (vcom->hdr->programType != vp->pending_vol_op->com.programType)) {
700 /* a different program has this volume checked out. deny. */
701 Log("FSYNC_VolOn: WARNING: program type %u has attempted to manipulate "
702 "state for volume %" AFS_VOLID_FMT " using command code %u while the volume is "
703 "checked out by program type %u for command code %u.\n",
704 vcom->hdr->programType,
705 afs_printable_VolumeId_lu(vcom->vop->volume),
707 vp->pending_vol_op->com.programType,
708 vp->pending_vol_op->com.command);
710 res->hdr.reason = FSYNC_EXCLUSIVE;
716 vcom->v->volumeID = 0;
719 if (vcom->hdr->command == FSYNC_VOL_LEAVE_OFF) {
720 /* nothing much to do if we're leaving the volume offline */
721 #ifdef AFS_DEMAND_ATTACH_FS
723 VCreateReservation_r(vp);
724 VWaitExclusiveState_r(vp);
726 if (vp && V_attachState(vp) != VOL_STATE_DELETED) {
727 if (FSYNC_partMatch(vcom, vp, 1)) {
728 if ((V_attachState(vp) == VOL_STATE_UNATTACHED) ||
729 (V_attachState(vp) == VOL_STATE_PREATTACHED)) {
730 VChangeState_r(vp, VOL_STATE_UNATTACHED);
731 VDeregisterVolOp_r(vp);
734 res->hdr.reason = FSYNC_BAD_STATE;
738 res->hdr.reason = FSYNC_WRONG_PART;
742 res->hdr.reason = FSYNC_UNKNOWN_VOLID;
746 VCancelReservation_r(vp);
753 #ifdef AFS_DEMAND_ATTACH_FS
756 FSYNC_partMatch(vcom, vp, 0) &&
757 vp->pending_vol_op &&
758 vp->pending_vol_op->vol_op_state == FSSYNC_VolOpRunningOnline &&
759 V_attachState(vp) == VOL_STATE_ATTACHED) {
761 /* noop; the volume stayed online for the volume operation and we were
762 * simply told that the vol op is done. The vp we already have is fine,
763 * so avoid confusing volume routines with trying to preattach an
764 * attached volume. */
767 /* first, check to see whether we have such a volume defined */
768 vp = VPreAttachVolumeById_r(&error,
774 VCreateReservation_r(vp);
775 VWaitExclusiveState_r(vp);
776 VDeregisterVolOp_r(vp);
777 VCancelReservation_r(vp);
780 #else /* !AFS_DEMAND_ATTACH_FS */
781 tvolName[0] = OS_DIRSEPC;
782 snprintf(&tvolName[1], sizeof(tvolName)-1, VFORMAT, afs_printable_VolumeId_lu(vcom->vop->volume));
783 tvolName[sizeof(tvolName)-1] = '\0';
785 vp = VAttachVolumeByName_r(&error, vcom->vop->partName, tvolName,
789 #endif /* !AFS_DEMAND_ATTACH_FS */
792 res->hdr.reason = error;
800 * service an FSYNC request to take a volume offline.
802 * @param[in] vcom pointer command object
803 * @param[out] res object in which to store response packet
805 * @return operation status
806 * @retval SYNC_OK volume transitioned offline
807 * @retval SYNC_FAILED invalid command protocol message
808 * @retval SYNC_DENIED operation could not be completed
810 * @note this is an FSYNC RPC server stub
812 * @note this procedure handles the following FSSYNC command codes:
814 * - FSYNC_VOL_NEEDVOLUME
816 * @note the supplementary reason code contains additional details.
817 * When SYNC_DENIED is returned, the specific reason is
818 * placed in the response packet reason field.
823 FSYNC_com_VolOff(FSSYNC_VolOp_command * vcom, SYNC_response * res)
825 FSSYNC_VolOp_info info;
826 afs_int32 code = SYNC_OK;
830 #ifdef AFS_DEMAND_ATTACH_FS
831 Volume *nvp, *rvp = NULL;
834 if (SYNC_verifyProtocolString(vcom->vop->partName, sizeof(vcom->vop->partName))) {
835 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
840 /* not already offline, we need to find a slot for newly offline volume */
841 if (vcom->hdr->programType == debugUtility) {
842 /* debug utilities do not have their operations tracked */
846 for (i = 0; i < MAXOFFLINEVOLUMES; i++) {
847 if (vcom->volumes[i].volumeID == 0) {
848 vcom->v = &vcom->volumes[i];
858 FSYNC_com_to_info(vcom, &info);
860 #ifdef AFS_DEMAND_ATTACH_FS
861 vp = VLookupVolume_r(&error, vcom->vop->volume, NULL);
863 vp = VGetVolume_r(&error, vcom->vop->volume);
867 if (!FSYNC_partMatch(vcom, vp, 1)) {
868 /* volume on desired partition is not online, so we
869 * should treat this as an offline volume.
871 #ifndef AFS_DEMAND_ATTACH_FS
879 #ifdef AFS_DEMAND_ATTACH_FS
881 ProgramType type = (ProgramType) vcom->hdr->programType;
883 /* do initial filtering of requests */
885 /* enforce mutual exclusion for volume ops */
886 if (vp->pending_vol_op) {
887 if (vp->pending_vol_op->com.programType != type) {
888 if (vp->pending_vol_op->com.command == FSYNC_VOL_OFF &&
889 vp->pending_vol_op->com.reason == FSYNC_SALVAGE) {
891 Log("denying offline request for volume %" AFS_VOLID_FMT "; volume is salvaging\n",
892 afs_printable_VolumeId_lu(vp->hashid));
894 res->hdr.reason = FSYNC_SALVAGE;
897 Log("volume %" AFS_VOLID_FMT " already checked out\n",
898 afs_printable_VolumeId_lu(vp->hashid));
900 Log("vp->vop = { com = { ver=%u, prog=%d, com=%d, reason=%d, len=%u, flags=0x%x }, vop = { vol=%" AFS_VOLID_FMT ", part='%s' } }\n",
901 vp->pending_vol_op->com.proto_version,
902 vp->pending_vol_op->com.programType,
903 vp->pending_vol_op->com.command,
904 vp->pending_vol_op->com.reason,
905 vp->pending_vol_op->com.command_len,
906 vp->pending_vol_op->com.flags,
907 afs_printable_VolumeId_lu(vp->pending_vol_op->vop.volume),
908 vp->pending_vol_op->vop.partName );
909 Log("vcom = { com = { ver=%u, prog=%d, com=%d, reason=%d, len=%u, flags=0x%x } , vop = { vol=%" AFS_VOLID_FMT ", part='%s' } }\n",
910 vcom->hdr->proto_version,
911 vcom->hdr->programType,
914 vcom->hdr->command_len,
916 afs_printable_VolumeId_lu(vcom->vop->volume),
917 vcom->vop->partName);
918 res->hdr.reason = FSYNC_EXCLUSIVE;
921 Log("warning: volume %" AFS_VOLID_FMT " recursively checked out by programType id %d\n",
922 afs_printable_VolumeId_lu(vp->hashid), vcom->hdr->programType);
926 /* wait for exclusive ops, so we have an accurate picture of the
927 * vol attach state */
928 VCreateReservation_r(vp);
929 VWaitExclusiveState_r(vp);
932 /* filter based upon requestor
934 * volume utilities / volserver are not allowed to check out
935 * volumes which are in an error state
937 * unknown utility programs will be denied on principal
942 /* it is possible for the salvageserver to checkout a
943 * volume for salvage before its scheduling request
944 * has been sent to the salvageserver */
945 if (vp->salvage.requested && !vp->salvage.scheduled) {
946 vp->salvage.scheduled = 1;
949 /* If the volume is in VOL_STATE_SALVAGE_REQ, we need to wait
950 * for the vol to go offline before we can give it away. Also
951 * make sure we don't come out with vp in an excl state. */
952 while (V_attachState(vp) == VOL_STATE_SALVAGE_REQ ||
953 VIsExclusiveState(V_attachState(vp))) {
955 VOL_CV_WAIT(&V_attachCV(vp));
963 if (VIsSalvaging(vp)) {
964 Log("denying offline request for volume %" AFS_VOLID_FMT "; volume is in salvaging state\n",
965 afs_printable_VolumeId_lu(vp->hashid));
966 res->hdr.reason = FSYNC_SALVAGE;
968 /* the volume hasn't been checked out yet by the salvager,
969 * but we think the volume is salvaging; schedule a
970 * a salvage to update the salvage priority */
971 FSYNC_backgroundSalvage(vp);
975 if (VIsErrorState(V_attachState(vp))) {
981 Log("bad program type passed to FSSYNC\n");
985 /* short circuit for offline volume states
986 * so we can avoid I/O penalty of attachment */
987 switch (V_attachState(vp)) {
988 case VOL_STATE_UNATTACHED:
989 case VOL_STATE_PREATTACHED:
990 case VOL_STATE_SALVAGING:
991 case VOL_STATE_ERROR:
992 /* register the volume operation metadata with the volume
994 * if the volume is currently pre-attached, attach2()
995 * will evaluate the vol op metadata to determine whether
996 * attaching the volume would be safe */
997 VRegisterVolOp_r(vp, &info);
998 vp->pending_vol_op->vol_op_state = FSSYNC_VolOpRunningUnknown;
1001 case VOL_STATE_DELETED:
1007 /* convert to heavyweight ref */
1008 nvp = VGetVolumeByVp_r(&error, vp);
1011 * It's possible for VGetVolumeByVp_r to have dropped and
1012 * re-acquired VOL_LOCK, so volume state may have changed
1013 * back to one of the states we tested for above. Since
1014 * GetVolume can return NULL in some of those states, just
1015 * test for the states again here.
1017 switch (V_attachState(vp)) {
1018 case VOL_STATE_UNATTACHED:
1019 case VOL_STATE_PREATTACHED:
1020 case VOL_STATE_SALVAGING:
1021 case VOL_STATE_ERROR:
1022 /* register the volume operation metadata with the volume
1024 * if the volume is currently pre-attached, attach2()
1025 * will evaluate the vol op metadata to determine whether
1026 * attaching the volume would be safe */
1027 VRegisterVolOp_r(vp, &info);
1028 vp->pending_vol_op->vol_op_state = FSSYNC_VolOpRunningUnknown;
1031 case VOL_STATE_DELETED:
1037 Log("FSYNC_com_VolOff: failed to get heavyweight reference to volume %" AFS_VOLID_FMT " (state=%u, flags=0x%x)\n",
1038 afs_printable_VolumeId_lu(vcom->vop->volume),
1039 V_attachState(vp), V_attachFlags(vp));
1040 res->hdr.reason = FSYNC_VOL_PKG_ERROR;
1042 } else if (nvp != vp) {
1043 /* i don't think this should ever happen, but just in case... */
1044 Log("FSYNC_com_VolOff: warning: potentially dangerous race detected\n");
1048 /* kill off lightweight ref to ensure we can't deadlock against ourselves later... */
1049 VCancelReservation_r(rvp);
1052 /* register the volume operation metadata with the volume */
1053 VRegisterVolOp_r(vp, &info);
1056 #endif /* AFS_DEMAND_ATTACH_FS */
1059 if (VVolOpLeaveOnline_r(vp, &info)) {
1060 VUpdateVolume_r(&error, vp, VOL_UPDATE_WAIT); /* At least get volume stats right */
1061 if (GetLogLevel() > 0) {
1062 Log("FSYNC: Volume %" AFS_VOLID_FMT " (%s) was left on line for an external %s request\n",
1063 afs_printable_VolumeId_lu(V_id(vp)), V_name(vp),
1064 vcom->hdr->reason == V_CLONE ? "clone" :
1065 vcom->hdr->reason == V_READONLY ? "readonly" :
1066 vcom->hdr->reason == V_DUMP ? "dump" :
1067 vcom->hdr->reason == FSYNC_SALVAGE ? "salvage" :
1070 #ifdef AFS_DEMAND_ATTACH_FS
1071 vp->pending_vol_op->vol_op_state = FSSYNC_VolOpRunningOnline;
1075 if (VVolOpSetVBusy_r(vp, &info)) {
1076 vp->specialStatus = VBUSY;
1079 /* remember what volume we got, so we can keep track of how
1080 * many volumes the volserver or whatever is using. Note that
1081 * vp is valid since leaveonline is only set when vp is valid.
1084 vcom->v->volumeID = vcom->vop->volume;
1085 strlcpy(vcom->v->partName, vp->partition->name, sizeof(vcom->v->partName));
1088 #ifdef AFS_DEMAND_ATTACH_FS
1089 VCreateReservation_r(vp);
1090 VOfflineForVolOp_r(&error, vp, "A volume utility is running.");
1092 opr_Assert(vp->nUsers==0);
1093 vp->pending_vol_op->vol_op_state = FSSYNC_VolOpRunningOffline;
1096 VWaitExclusiveState_r(vp);
1097 VDeregisterVolOp_r(vp);
1100 VCancelReservation_r(vp);
1102 VOffline_r(vp, "A volume utility is running.");
1113 #ifdef AFS_DEMAND_ATTACH_FS
1115 VCancelReservation_r(rvp);
1122 * service an FSYNC request to mark a volume as moved.
1124 * @param[in] vcom pointer command object
1125 * @param[out] res object in which to store response packet
1127 * @return operation status
1128 * @retval SYNC_OK volume marked as moved to a remote server
1129 * @retval SYNC_FAILED invalid command protocol message
1130 * @retval SYNC_DENIED current volume state does not permit this operation
1132 * @note this is an FSYNC RPC server stub
1134 * @note this operation also breaks all callbacks for the given volume
1136 * @note this procedure handles the following FSSYNC command codes:
1139 * @note the supplementary reason code contains additional details. For
1140 * instance, SYNC_OK is still returned when the partition specified
1141 * does not match the one registered in the volume object -- reason
1142 * will be FSYNC_WRONG_PART in this case.
1147 FSYNC_com_VolMove(FSSYNC_VolOp_command * vcom, SYNC_response * res)
1149 afs_int32 code = SYNC_DENIED;
1153 if (SYNC_verifyProtocolString(vcom->vop->partName, sizeof(vcom->vop->partName))) {
1154 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
1159 /* Yuch: the "reason" for the move is the site it got moved to... */
1160 /* still set specialStatus so we stop sending back VBUSY.
1161 * also should still break callbacks. Note that I don't know
1162 * how to tell if we should break all or not, so we just do it
1163 * since it doesn't matter much if we do an extra break
1164 * volume callbacks on a volume move within the same server */
1165 #ifdef AFS_DEMAND_ATTACH_FS
1166 vp = VLookupVolume_r(&error, vcom->vop->volume, NULL);
1168 vp = VGetVolume_r(&error, vcom->vop->volume);
1171 if (FSYNC_partMatch(vcom, vp, 1)) {
1172 #ifdef AFS_DEMAND_ATTACH_FS
1173 if ((V_attachState(vp) == VOL_STATE_UNATTACHED) ||
1174 (V_attachState(vp) == VOL_STATE_PREATTACHED)) {
1177 vp->specialStatus = VMOVED;
1178 #ifdef AFS_DEMAND_ATTACH_FS
1180 res->hdr.reason = FSYNC_BAD_STATE;
1184 res->hdr.reason = FSYNC_WRONG_PART;
1186 #ifndef AFS_DEMAND_ATTACH_FS
1188 #endif /* !AFS_DEMAND_ATTACH_FS */
1190 res->hdr.reason = FSYNC_UNKNOWN_VOLID;
1193 if ((code == SYNC_OK) && (V_BreakVolumeCallbacks != NULL)) {
1194 Log("fssync: volume %" AFS_VOLID_FMT " moved to %x; breaking all call backs\n",
1195 afs_printable_VolumeId_lu(vcom->vop->volume), vcom->hdr->reason);
1197 (*V_BreakVolumeCallbacks) (vcom->vop->volume);
1207 * service an FSYNC request to mark a volume as destroyed.
1209 * @param[in] vcom pointer command object
1210 * @param[out] res object in which to store response packet
1212 * @return operation status
1213 * @retval SYNC_OK volume marked as destroyed
1214 * @retval SYNC_FAILED invalid command protocol message
1215 * @retval SYNC_DENIED current volume state does not permit this operation
1217 * @note this is an FSYNC RPC server stub
1219 * @note this procedure handles the following FSSYNC command codes:
1222 * @note the supplementary reason code contains additional details. For
1223 * instance, SYNC_OK is still returned when the partition specified
1224 * does not match the one registered in the volume object -- reason
1225 * will be FSYNC_WRONG_PART in this case.
1230 FSYNC_com_VolDone(FSSYNC_VolOp_command * vcom, SYNC_response * res)
1232 afs_int32 code = SYNC_FAILED;
1236 if (SYNC_verifyProtocolString(vcom->vop->partName, sizeof(vcom->vop->partName))) {
1237 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
1241 /* don't try to put online, this call is made only after deleting
1242 * a volume, in which case we want to remove the vol # from the
1243 * OfflineVolumes array only */
1245 vcom->v->volumeID = 0;
1247 vp = VLookupVolume_r(&error, vcom->vop->volume, NULL);
1249 if (FSYNC_partMatch(vcom, vp, 1)) {
1250 #ifdef AFS_DEMAND_ATTACH_FS
1251 VCreateReservation_r(vp);
1252 VWaitExclusiveState_r(vp);
1254 if ((V_attachState(vp) == VOL_STATE_UNATTACHED) ||
1255 (V_attachState(vp) == VOL_STATE_PREATTACHED) ||
1256 VIsErrorState(V_attachState(vp))) {
1258 /* Change state to DELETED, not UNATTACHED, so clients get
1259 * a VNOVOL error when they try to access from now on. */
1261 VChangeState_r(vp, VOL_STATE_DELETED);
1262 VDeregisterVolOp_r(vp);
1264 /* Volume is gone; clear out old salvage stats */
1265 memset(&vp->salvage, 0, sizeof(vp->salvage));
1267 /* Someday we should free the vp, too, after about 2 hours,
1268 * possibly by putting the vp back on the VLRU. */
1271 } else if (V_attachState(vp) == VOL_STATE_DELETED) {
1272 VDeregisterVolOp_r(vp);
1273 res->hdr.reason = FSYNC_UNKNOWN_VOLID;
1277 res->hdr.reason = FSYNC_BAD_STATE;
1280 VCancelReservation_r(vp);
1282 #else /* AFS_DEMAND_ATTACH_FS */
1283 if (!vp->specialStatus) {
1284 vp->specialStatus = VNOVOL;
1287 #endif /* !AFS_DEMAND_ATTACH_FS */
1289 code = SYNC_OK; /* XXX is this really a good idea? */
1290 res->hdr.reason = FSYNC_WRONG_PART;
1293 res->hdr.reason = FSYNC_UNKNOWN_VOLID;
1300 #ifdef AFS_DEMAND_ATTACH_FS
1302 * service an FSYNC request to transition a volume to the hard error state.
1304 * @param[in] vcom pointer command object
1305 * @param[out] res object in which to store response packet
1307 * @return operation status
1308 * @retval SYNC_OK volume transitioned to hard error state
1309 * @retval SYNC_FAILED invalid command protocol message
1310 * @retval SYNC_DENIED (see note)
1312 * @note this is an FSYNC RPC server stub
1314 * @note this procedure handles the following FSSYNC command codes:
1315 * - FSYNC_VOL_FORCE_ERROR
1317 * @note SYNC_DENIED is returned in the following cases:
1318 * - no partition name is specified (reason field set to
1319 * FSYNC_WRONG_PART).
1320 * - volume id not known to fileserver (reason field set
1321 * to FSYNC_UNKNOWN_VOLID).
1323 * @note demand attach fileserver only
1328 FSYNC_com_VolError(FSSYNC_VolOp_command * vcom, SYNC_response * res)
1332 afs_int32 code = SYNC_FAILED;
1334 if (SYNC_verifyProtocolString(vcom->vop->partName, sizeof(vcom->vop->partName))) {
1335 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
1339 vp = VLookupVolume_r(&error, vcom->vop->volume, NULL);
1341 if (!vp && vcom->hdr->reason == FSYNC_SALVAGE) {
1342 /* The requested volume doesn't seem to exist. However, it is possible
1343 * that this is triggered by trying to create or clone a volume that
1344 * was prevented from succeeding by a half-created volume in the way.
1345 * (e.g. we tried to create volume X, but volume X exists except that
1346 * its .vol header was deleted for some reason) So, still try to
1347 * a salvage for that volume ID. */
1349 Log("FSYNC_com_VolError: attempting to schedule salvage for unknown "
1350 "volume %lu part %s\n", afs_printable_uint32_lu(vcom->vop->volume),
1351 vcom->vop->partName);
1352 vp = VPreAttachVolumeById_r(&error, vcom->vop->partName,
1357 if (FSYNC_partMatch(vcom, vp, 0)) {
1358 VCreateReservation_r(vp);
1359 VWaitExclusiveState_r(vp);
1360 VDeregisterVolOp_r(vp);
1362 if (vcom->hdr->reason == FSYNC_SALVAGE) {
1363 FSYNC_backgroundSalvage(vp);
1365 /* null out salvsync control state, as it's no longer relevant */
1366 memset(&vp->salvage, 0, sizeof(vp->salvage));
1367 VChangeState_r(vp, VOL_STATE_ERROR);
1370 VCancelReservation_r(vp);
1375 res->hdr.reason = FSYNC_WRONG_PART;
1378 res->hdr.reason = FSYNC_UNKNOWN_VOLID;
1384 #endif /* AFS_DEMAND_ATTACH_FS */
1387 * service an FSYNC request to break all callbacks for this volume.
1389 * @param[in] vcom pointer command object
1390 * @param[out] res object in which to store response packet
1392 * @return operation status
1393 * @retval SYNC_OK callback breaks scheduled for volume
1395 * @note this is an FSYNC RPC server stub
1397 * @note this procedure handles the following FSSYNC command codes:
1398 * - FSYNC_VOL_BREAKCBKS
1400 * @note demand attach fileserver only
1402 * @todo should do partition matching
1407 FSYNC_com_VolBreakCBKs(FSSYNC_VolOp_command * vcom, SYNC_response * res)
1409 /* if the volume is being restored, break all callbacks on it */
1410 if (V_BreakVolumeCallbacks) {
1411 Log("fssync: breaking all call backs for volume %" AFS_VOLID_FMT "\n",
1412 afs_printable_VolumeId_lu(vcom->vop->volume));
1414 (*V_BreakVolumeCallbacks) (vcom->vop->volume);
1421 * service an FSYNC request to return the Volume object.
1423 * @param[in] vcom pointer command object
1424 * @param[out] res object in which to store response packet
1426 * @return operation status
1427 * @retval SYNC_OK volume object returned to caller
1428 * @retval SYNC_FAILED bad command packet, or failed to locate volume object
1430 * @note this is an FSYNC RPC server stub
1432 * @note this procedure handles the following FSSYNC command codes:
1438 FSYNC_com_VolQuery(FSSYNC_VolOp_command * vcom, SYNC_response * res)
1440 afs_int32 code = SYNC_FAILED;
1444 if (SYNC_verifyProtocolString(vcom->vop->partName, sizeof(vcom->vop->partName))) {
1445 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
1449 #ifdef AFS_DEMAND_ATTACH_FS
1450 vp = VLookupVolume_r(&error, vcom->vop->volume, NULL);
1451 #else /* !AFS_DEMAND_ATTACH_FS */
1452 vp = VGetVolume_r(&error, vcom->vop->volume);
1453 #endif /* !AFS_DEMAND_ATTACH_FS */
1456 if (FSYNC_partMatch(vcom, vp, 1)) {
1457 if (res->payload.len >= sizeof(Volume)) {
1458 memcpy(res->payload.buf, vp, sizeof(Volume));
1459 res->hdr.response_len += sizeof(Volume);
1462 res->hdr.reason = SYNC_REASON_PAYLOAD_TOO_BIG;
1465 res->hdr.reason = FSYNC_WRONG_PART;
1467 #ifndef AFS_DEMAND_ATTACH_FS
1471 res->hdr.reason = FSYNC_UNKNOWN_VOLID;
1479 * service an FSYNC request to return the Volume header.
1481 * @param[in] vcom pointer command object
1482 * @param[out] res object in which to store response packet
1484 * @return operation status
1485 * @retval SYNC_OK volume header returned to caller
1486 * @retval SYNC_FAILED bad command packet, or failed to locate volume header
1488 * @note this is an FSYNC RPC server stub
1490 * @note this procedure handles the following FSSYNC command codes:
1491 * - FSYNC_VOL_QUERY_HDR
1496 FSYNC_com_VolHdrQuery(FSSYNC_VolOp_command * vcom, SYNC_response * res)
1498 afs_int32 code = SYNC_FAILED;
1502 if (SYNC_verifyProtocolString(vcom->vop->partName, sizeof(vcom->vop->partName))) {
1503 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
1506 if (res->payload.len < sizeof(VolumeDiskData)) {
1507 res->hdr.reason = SYNC_REASON_PAYLOAD_TOO_BIG;
1511 #ifdef AFS_DEMAND_ATTACH_FS
1512 vp = VLookupVolume_r(&error, vcom->vop->volume, NULL);
1513 #else /* !AFS_DEMAND_ATTACH_FS */
1514 vp = VGetVolume_r(&error, vcom->vop->volume);
1518 if (FSYNC_partMatch(vcom, vp, 1)) {
1519 #ifdef AFS_DEMAND_ATTACH_FS
1520 if ((vp->header == NULL) ||
1521 !(V_attachFlags(vp) & VOL_HDR_ATTACHED) ||
1522 !(V_attachFlags(vp) & VOL_HDR_LOADED)) {
1523 res->hdr.reason = FSYNC_HDR_NOT_ATTACHED;
1526 #else /* !AFS_DEMAND_ATTACH_FS */
1527 if (!vp || !vp->header) {
1528 res->hdr.reason = FSYNC_HDR_NOT_ATTACHED;
1531 #endif /* !AFS_DEMAND_ATTACH_FS */
1533 res->hdr.reason = FSYNC_WRONG_PART;
1537 res->hdr.reason = FSYNC_UNKNOWN_VOLID;
1541 memcpy(res->payload.buf, &V_disk(vp), sizeof(VolumeDiskData));
1542 res->hdr.response_len += sizeof(VolumeDiskData);
1546 #ifndef AFS_DEMAND_ATTACH_FS
1554 #ifdef AFS_DEMAND_ATTACH_FS
1556 FSYNC_com_VolOpQuery(FSSYNC_VolOp_command * vcom, SYNC_response * res)
1558 afs_int32 code = SYNC_OK;
1562 vp = VLookupVolume_r(&error, vcom->vop->volume, NULL);
1565 VCreateReservation_r(vp);
1566 VWaitExclusiveState_r(vp);
1569 if (vp && vp->pending_vol_op) {
1570 if (!FSYNC_partMatch(vcom, vp, 1)) {
1571 res->hdr.reason = FSYNC_WRONG_PART;
1574 opr_Assert(sizeof(FSSYNC_VolOp_info) <= res->payload.len);
1575 memcpy(res->payload.buf, vp->pending_vol_op, sizeof(FSSYNC_VolOp_info));
1576 res->hdr.response_len += sizeof(FSSYNC_VolOp_info);
1579 if (!vp || V_attachState(vp) == VOL_STATE_DELETED) {
1580 res->hdr.reason = FSYNC_UNKNOWN_VOLID;
1581 } else if (!FSYNC_partMatch(vcom, vp, 1)) {
1582 res->hdr.reason = FSYNC_WRONG_PART;
1584 res->hdr.reason = FSYNC_NO_PENDING_VOL_OP;
1590 VCancelReservation_r(vp);
1596 FSYNC_com_VGQuery(FSSYNC_VolOp_command * vcom, SYNC_response * res)
1598 afs_int32 code = SYNC_FAILED;
1600 struct DiskPartition64 * dp;
1602 if (SYNC_verifyProtocolString(vcom->vop->partName, sizeof(vcom->vop->partName))) {
1603 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
1607 dp = VGetPartition_r(vcom->vop->partName, 0);
1609 res->hdr.reason = FSYNC_BAD_PART;
1613 opr_Assert(sizeof(FSSYNC_VGQry_response_t) <= res->payload.len);
1615 rc = VVGCache_query_r(dp, vcom->vop->volume, res->payload.buf);
1618 res->hdr.response_len += sizeof(FSSYNC_VGQry_response_t);
1622 res->hdr.reason = FSYNC_PART_SCANNING;
1625 res->hdr.reason = FSYNC_UNKNOWN_VOLID;
1636 FSYNC_com_VGUpdate(osi_socket fd, SYNC_command * com, SYNC_response * res)
1638 afs_int32 code = SYNC_FAILED;
1639 struct DiskPartition64 * dp;
1640 FSSYNC_VGUpdate_command_t * vgucom;
1643 if (com->recv_len != (sizeof(com->hdr) + sizeof(*vgucom))) {
1644 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
1645 res->hdr.flags |= SYNC_FLAG_CHANNEL_SHUTDOWN;
1646 code = SYNC_COM_ERROR;
1650 vgucom = com->payload.buf;
1652 ViceLog(125, ("FSYNC_com_VGUpdate: fd %d got command for parent %lu child "
1653 "%lu partName %.16s\n", (int)fd,
1654 afs_printable_uint32_lu(vgucom->parent),
1655 afs_printable_uint32_lu(vgucom->child),
1658 if (SYNC_verifyProtocolString(vgucom->partName, sizeof(vgucom->partName))) {
1659 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
1663 dp = VGetPartition_r(vgucom->partName, 0);
1665 res->hdr.reason = FSYNC_BAD_PART;
1669 switch(com->hdr.command) {
1671 rc = VVGCache_entry_add_r(dp, vgucom->parent, vgucom->child, NULL);
1675 rc = VVGCache_entry_del_r(dp, vgucom->parent, vgucom->child);
1679 Log("FSYNC_com_VGUpdate called improperly\n");
1684 /* EINVAL means the partition VGC doesn't exist at all; not really
1686 if (rc == 0 || rc == EINVAL) {
1691 res->hdr.reason = FSYNC_UNKNOWN_VOLID;
1693 res->hdr.reason = FSYNC_WHATEVER;
1701 FSYNC_com_VGScan(FSSYNC_VolOp_command * vcom, SYNC_response * res)
1703 afs_int32 code = SYNC_FAILED;
1704 struct DiskPartition64 * dp;
1706 if (SYNC_verifyProtocolString(vcom->vop->partName, sizeof(vcom->vop->partName))) {
1707 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
1711 dp = VGetPartition_r(vcom->vop->partName, 0);
1713 res->hdr.reason = FSYNC_BAD_PART;
1717 if (VVGCache_scanStart_r(dp) == 0) {
1726 FSYNC_com_VGScanAll(FSSYNC_VolOp_command * com, SYNC_response * res)
1728 afs_int32 code = SYNC_FAILED;
1730 if (VVGCache_scanStart_r(NULL) == 0) {
1736 #endif /* AFS_DEMAND_ATTACH_FS */
1739 FSYNC_com_VnQry(osi_socket fd, SYNC_command * com, SYNC_response * res)
1741 afs_int32 code = SYNC_OK;
1742 FSSYNC_VnQry_hdr * qry = com->payload.buf;
1747 if (com->recv_len != (sizeof(com->hdr) + sizeof(FSSYNC_VnQry_hdr))) {
1748 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
1749 res->hdr.flags |= SYNC_FLAG_CHANNEL_SHUTDOWN;
1750 return SYNC_COM_ERROR;
1753 ViceLog(125, ("FSYNC_com_VnQry: fd %d got command for vol %lu vnode %lu "
1754 "uniq %lu spare %lu partName %.16s\n", (int)fd,
1755 afs_printable_uint32_lu(qry->volume),
1756 afs_printable_uint32_lu(qry->vnode),
1757 afs_printable_uint32_lu(qry->unique),
1758 afs_printable_uint32_lu(qry->spare),
1761 #ifdef AFS_DEMAND_ATTACH_FS
1762 vp = VLookupVolume_r(&error, qry->volume, NULL);
1763 #else /* !AFS_DEMAND_ATTACH_FS */
1764 vp = VGetVolume_r(&error, qry->volume);
1765 #endif /* !AFS_DEMAND_ATTACH_FS */
1768 res->hdr.reason = FSYNC_UNKNOWN_VOLID;
1773 vnp = VLookupVnode(vp, qry->vnode);
1775 res->hdr.reason = FSYNC_UNKNOWN_VNID;
1780 if (Vn_class(vnp)->residentSize > res->payload.len) {
1781 res->hdr.reason = SYNC_REASON_ENCODING_ERROR;
1786 memcpy(res->payload.buf, vnp, Vn_class(vnp)->residentSize);
1787 res->hdr.response_len += Vn_class(vnp)->residentSize;
1790 #ifndef AFS_DEMAND_ATTACH_FS
1799 FSYNC_com_StatsOp(osi_socket fd, SYNC_command * com, SYNC_response * res)
1801 afs_int32 code = SYNC_OK;
1802 FSSYNC_StatsOp_command scom;
1804 if (com->recv_len != (sizeof(com->hdr) + sizeof(FSSYNC_StatsOp_hdr))) {
1805 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
1806 res->hdr.flags |= SYNC_FLAG_CHANNEL_SHUTDOWN;
1807 return SYNC_COM_ERROR;
1810 scom.hdr = &com->hdr;
1811 scom.sop = (FSSYNC_StatsOp_hdr *) com->payload.buf;
1814 ViceLog(125, ("FSYNC_com_StatsOp: fd %d got command for stats: "
1815 "{vlru_generation = %lu, hash_bucket = %lu, partName = "
1816 "%.16s}\n", (int)fd,
1817 afs_printable_uint32_lu(scom.sop->args.vlru_generation),
1818 afs_printable_uint32_lu(scom.sop->args.hash_bucket),
1819 scom.sop->args.partName));
1821 switch (com->hdr.command) {
1822 case FSYNC_VOL_STATS_GENERAL:
1823 code = FSYNC_com_StatsOpGeneral(&scom, res);
1825 #ifdef AFS_DEMAND_ATTACH_FS
1826 /* statistics for the following subsystems are only tracked
1827 * for demand attach fileservers */
1828 case FSYNC_VOL_STATS_VICEP:
1829 code = FSYNC_com_StatsOpViceP(&scom, res);
1831 case FSYNC_VOL_STATS_HASH:
1832 code = FSYNC_com_StatsOpHash(&scom, res);
1834 case FSYNC_VOL_STATS_HDR:
1835 code = FSYNC_com_StatsOpHdr(&scom, res);
1837 case FSYNC_VOL_STATS_VLRU:
1838 code = FSYNC_com_StatsOpVLRU(&scom, res);
1840 #endif /* AFS_DEMAND_ATTACH_FS */
1842 code = SYNC_BAD_COMMAND;
1849 FSYNC_com_StatsOpGeneral(FSSYNC_StatsOp_command * scom, SYNC_response * res)
1851 afs_int32 code = SYNC_OK;
1853 memcpy(res->payload.buf, &VStats, sizeof(VStats));
1854 res->hdr.response_len += sizeof(VStats);
1859 #ifdef AFS_DEMAND_ATTACH_FS
1861 FSYNC_com_StatsOpViceP(FSSYNC_StatsOp_command * scom, SYNC_response * res)
1863 afs_int32 code = SYNC_OK;
1864 struct DiskPartition64 * dp;
1865 struct DiskPartitionStats64 * stats;
1867 if (SYNC_verifyProtocolString(scom->sop->args.partName, sizeof(scom->sop->args.partName))) {
1868 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
1873 dp = VGetPartition_r(scom->sop->args.partName, 0);
1877 stats = (struct DiskPartitionStats64 *) res->payload.buf;
1878 stats->free = dp->free;
1879 stats->totalUsable = dp->totalUsable;
1880 stats->minFree = dp->minFree;
1881 stats->f_files = dp->f_files;
1882 stats->vol_list_len = dp->vol_list.len;
1884 res->hdr.response_len += sizeof(struct DiskPartitionStats64);
1892 FSYNC_com_StatsOpHash(FSSYNC_StatsOp_command * scom, SYNC_response * res)
1894 afs_int32 code = SYNC_OK;
1895 struct VolumeHashChainStats * stats;
1896 struct VolumeHashChainHead * head;
1898 if (scom->sop->args.hash_bucket >= VolumeHashTable.Size) {
1902 head = &VolumeHashTable.Table[scom->sop->args.hash_bucket];
1903 stats = (struct VolumeHashChainStats *) res->payload.buf;
1904 stats->table_size = VolumeHashTable.Size;
1905 stats->chain_len = head->len;
1906 stats->chain_cacheCheck = head->cacheCheck;
1907 stats->chain_busy = head->busy;
1908 AssignInt64(head->looks, &stats->chain_looks);
1909 AssignInt64(head->gets, &stats->chain_gets);
1910 AssignInt64(head->reorders, &stats->chain_reorders);
1912 res->hdr.response_len += sizeof(struct VolumeHashChainStats);
1918 FSYNC_com_StatsOpHdr(FSSYNC_StatsOp_command * scom, SYNC_response * res)
1920 afs_int32 code = SYNC_OK;
1922 memcpy(res->payload.buf, &volume_hdr_LRU.stats, sizeof(volume_hdr_LRU.stats));
1923 res->hdr.response_len += sizeof(volume_hdr_LRU.stats);
1929 FSYNC_com_StatsOpVLRU(FSSYNC_StatsOp_command * scom, SYNC_response * res)
1931 afs_int32 code = SYNC_OK;
1933 code = SYNC_BAD_COMMAND;
1937 #endif /* AFS_DEMAND_ATTACH_FS */
1940 * populate an FSSYNC_VolOp_info object from a command packet object.
1942 * @param[in] vcom pointer to command packet
1943 * @param[out] info pointer to info object which will be populated
1945 * @note FSSYNC_VolOp_info objects are attached to Volume objects when
1946 * a volume operation is commenced.
1951 FSYNC_com_to_info(FSSYNC_VolOp_command * vcom, FSSYNC_VolOp_info * info)
1953 memcpy(&info->com, vcom->hdr, sizeof(SYNC_command_hdr));
1954 memcpy(&info->vop, vcom->vop, sizeof(FSSYNC_VolOp_hdr));
1955 info->vol_op_state = FSSYNC_VolOpPending;
1959 * check whether command packet partition name matches volume
1960 * object's partition name.
1962 * @param[in] vcom pointer to command packet
1963 * @param[in] vp pointer to volume object
1964 * @param[in] match_anon anon matching control flag (see note below)
1966 * @return whether partitions match
1967 * @retval 0 partitions do NOT match
1968 * @retval 1 partitions match
1970 * @note if match_anon is non-zero, then this function will return a
1971 * positive match for a zero-length partition string in the
1977 FSYNC_partMatch(FSSYNC_VolOp_command * vcom, Volume * vp, int match_anon)
1979 return ((match_anon && vcom->vop->partName[0] == 0) ||
1980 (strncmp(vcom->vop->partName, V_partition(vp)->name,
1981 sizeof(vcom->vop->partName)) == 0));
1986 FSYNC_Drop(osi_socket fd)
1988 struct offlineInfo *p;
1991 #ifndef AFS_DEMAND_ATTACH_FS
1992 char tvolName[VMAXPATHLEN];
1996 p = OfflineVolumes[FindHandler(fd)];
1997 for (i = 0; i < MAXOFFLINEVOLUMES; i++) {
1998 if (p[i].volumeID) {
2001 #ifdef AFS_DEMAND_ATTACH_FS
2002 vp = VPreAttachVolumeById_r(&error, p[i].partName, p[i].volumeID);
2004 VCreateReservation_r(vp);
2005 VWaitExclusiveState_r(vp);
2006 VDeregisterVolOp_r(vp);
2007 VCancelReservation_r(vp);
2010 tvolName[0] = OS_DIRSEPC;
2011 sprintf(&tvolName[1], VFORMAT, afs_printable_VolumeId_lu(p[i].volumeID));
2012 vp = VAttachVolumeByName_r(&error, p[i].partName, tvolName,
2016 #endif /* !AFS_DEMAND_ATTACH_FS */
2026 static int AcceptHandler = -1; /* handler id for accept, if turned on */
2031 if (AcceptHandler == -1) {
2032 opr_Verify(AddHandler(fssync_server_state.fd, FSYNC_newconnection));
2033 AcceptHandler = FindHandler(fssync_server_state.fd);
2040 if (AcceptHandler != -1) {
2041 opr_Verify(RemoveHandler(fssync_server_state.fd));
2046 /* The multiple FD handling code. */
2048 static osi_socket HandlerFD[MAXHANDLERS];
2049 static void (*HandlerProc[MAXHANDLERS]) (osi_socket);
2055 ObtainWriteLock(&FSYNC_handler_lock);
2056 for (i = 0; i < MAXHANDLERS; i++) {
2057 HandlerFD[i] = OSI_NULLSOCKET;
2060 ReleaseWriteLock(&FSYNC_handler_lock);
2063 #if defined(HAVE_POLL) && defined(AFS_PTHREAD_ENV)
2065 CallHandler(struct pollfd *fds, int nfds, int mask)
2069 ObtainReadLock(&FSYNC_handler_lock);
2070 for (i = 0; i < nfds; i++) {
2071 if (fds[i].revents & mask) {
2072 handler = FindHandler_r(fds[i].fd);
2073 ReleaseReadLock(&FSYNC_handler_lock);
2074 (*HandlerProc[handler]) (fds[i].fd);
2075 ObtainReadLock(&FSYNC_handler_lock);
2078 ReleaseReadLock(&FSYNC_handler_lock);
2082 CallHandler(fd_set * fdsetp)
2085 ObtainReadLock(&FSYNC_handler_lock);
2086 for (i = 0; i < MAXHANDLERS; i++) {
2087 if (HandlerFD[i] >= 0 && FD_ISSET(HandlerFD[i], fdsetp)) {
2088 ReleaseReadLock(&FSYNC_handler_lock);
2089 (*HandlerProc[i]) (HandlerFD[i]);
2090 ObtainReadLock(&FSYNC_handler_lock);
2093 ReleaseReadLock(&FSYNC_handler_lock);
2098 AddHandler(osi_socket afd, void (*aproc) (osi_socket))
2101 ObtainWriteLock(&FSYNC_handler_lock);
2102 for (i = 0; i < MAXHANDLERS; i++)
2103 if (HandlerFD[i] == OSI_NULLSOCKET)
2105 if (i >= MAXHANDLERS) {
2106 ReleaseWriteLock(&FSYNC_handler_lock);
2110 HandlerProc[i] = aproc;
2111 ReleaseWriteLock(&FSYNC_handler_lock);
2116 FindHandler(osi_socket afd)
2119 ObtainReadLock(&FSYNC_handler_lock);
2120 for (i = 0; i < MAXHANDLERS; i++)
2121 if (HandlerFD[i] == afd) {
2122 ReleaseReadLock(&FSYNC_handler_lock);
2125 ReleaseReadLock(&FSYNC_handler_lock); /* just in case */
2127 AFS_UNREACHED(return(-1)); /* satisfy compiler */
2131 FindHandler_r(osi_socket afd)
2134 for (i = 0; i < MAXHANDLERS; i++)
2135 if (HandlerFD[i] == afd) {
2139 AFS_UNREACHED(return(-1)); /* satisfy compiler */
2143 RemoveHandler(osi_socket afd)
2145 ObtainWriteLock(&FSYNC_handler_lock);
2146 HandlerFD[FindHandler_r(afd)] = OSI_NULLSOCKET;
2147 ReleaseWriteLock(&FSYNC_handler_lock);
2151 #if defined(HAVE_POLL) && defined(AFS_PTHREAD_ENV)
2153 GetHandler(struct pollfd *fds, int maxfds, int events, int *nfds)
2157 ObtainReadLock(&FSYNC_handler_lock);
2158 for (i = 0; i < MAXHANDLERS; i++)
2159 if (HandlerFD[i] != OSI_NULLSOCKET) {
2160 opr_Assert(fdi<maxfds);
2161 fds[fdi].fd = HandlerFD[i];
2162 fds[fdi].events = events;
2163 fds[fdi].revents = 0;
2167 ReleaseReadLock(&FSYNC_handler_lock);
2171 GetHandler(fd_set * fdsetp, int *maxfdp)
2176 ObtainReadLock(&FSYNC_handler_lock); /* just in case */
2177 for (i = 0; i < MAXHANDLERS; i++)
2178 if (HandlerFD[i] != OSI_NULLSOCKET) {
2179 FD_SET(HandlerFD[i], fdsetp);
2180 #ifndef AFS_NT40_ENV
2181 /* On Windows the nfds parameter to select() is ignored */
2182 if (maxfd < HandlerFD[i] || maxfd == (int)-1)
2183 maxfd = HandlerFD[i];
2184 #endif /* AFS_NT40_ENV */
2187 ReleaseReadLock(&FSYNC_handler_lock); /* just in case */
2189 #endif /* HAVE_POLL && AFS_PTHREAD_ENV */
2191 #endif /* FSSYNC_BUILD_SERVER */