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) 2006-2008 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>
47 #include <sys/types.h>
53 #include <sys/param.h>
54 #include <sys/socket.h>
55 #include <netinet/in.h>
61 #ifdef AFS_PTHREAD_ENV
63 #else /* AFS_PTHREAD_ENV */
64 #include <afs/assert.h>
65 #endif /* AFS_PTHREAD_ENV */
70 #include <afs/afsint.h>
72 #include <afs/errors.h>
73 #include "daemon_com.h"
77 #include <afs/afssyscalls.h>
81 #include "volume_inline.h"
82 #include "partition.h"
86 #endif /* HAVE_POLL */
88 #ifdef USE_UNIX_SOCKETS
90 #include <afs/afsutil.h>
91 #endif /* USE_UNIX_SOCKETS */
93 #ifdef FSSYNC_BUILD_SERVER
95 /*@printflike@*/ extern void Log(const char *format, ...);
97 int (*V_BreakVolumeCallbacks) (VolumeId volume);
99 #define MAXHANDLERS 4 /* Up to 4 clients; must be at least 2, so that
100 * move = dump+restore can run on single server */
101 #define MAXOFFLINEVOLUMES 128 /* This needs to be as big as the maximum
102 * number that would be offline for 1 operation.
103 * Current winner is salvage, which needs all
104 * cloned read-only copies offline when salvaging
105 * a single read-write volume */
109 static struct offlineInfo OfflineVolumes[MAXHANDLERS][MAXOFFLINEVOLUMES];
112 * fssync server socket handle.
114 static SYNC_server_state_t fssync_server_state =
115 { -1, /* file descriptor */
116 FSSYNC_ENDPOINT_DECL, /* server endpoint */
117 FSYNC_PROTO_VERSION, /* protocol version */
118 5, /* bind() retry limit */
119 100, /* listen() queue depth */
120 "FSSYNC", /* protocol name string */
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);
145 static afs_int32 FSYNC_com_VolOp(osi_socket fd, SYNC_command * com, SYNC_response * res);
147 #ifdef AFS_DEMAND_ATTACH_FS
148 static afs_int32 FSYNC_com_VolError(FSSYNC_VolOp_command * com, SYNC_response * res);
150 static afs_int32 FSYNC_com_VolOn(FSSYNC_VolOp_command * com, SYNC_response * res);
151 static afs_int32 FSYNC_com_VolOff(FSSYNC_VolOp_command * com, SYNC_response * res);
152 static afs_int32 FSYNC_com_VolMove(FSSYNC_VolOp_command * com, SYNC_response * res);
153 static afs_int32 FSYNC_com_VolBreakCBKs(FSSYNC_VolOp_command * com, SYNC_response * res);
154 static afs_int32 FSYNC_com_VolDone(FSSYNC_VolOp_command * com, SYNC_response * res);
155 static afs_int32 FSYNC_com_VolQuery(FSSYNC_VolOp_command * com, SYNC_response * res);
156 static afs_int32 FSYNC_com_VolHdrQuery(FSSYNC_VolOp_command * com, SYNC_response * res);
157 #ifdef AFS_DEMAND_ATTACH_FS
158 static afs_int32 FSYNC_com_VolOpQuery(FSSYNC_VolOp_command * com, SYNC_response * res);
159 #endif /* AFS_DEMAND_ATTACH_FS */
161 static afs_int32 FSYNC_com_VnQry(osi_socket fd, SYNC_command * com, SYNC_response * res);
163 static afs_int32 FSYNC_com_StatsOp(osi_socket fd, SYNC_command * com, SYNC_response * res);
165 static afs_int32 FSYNC_com_StatsOpGeneral(FSSYNC_StatsOp_command * scom, SYNC_response * res);
167 #ifdef AFS_DEMAND_ATTACH_FS
168 static afs_int32 FSYNC_com_StatsOpViceP(FSSYNC_StatsOp_command * scom, SYNC_response * res);
169 static afs_int32 FSYNC_com_StatsOpHash(FSSYNC_StatsOp_command * scom, SYNC_response * res);
170 static afs_int32 FSYNC_com_StatsOpHdr(FSSYNC_StatsOp_command * scom, SYNC_response * res);
171 static afs_int32 FSYNC_com_StatsOpVLRU(FSSYNC_StatsOp_command * scom, SYNC_response * res);
174 static void FSYNC_com_to_info(FSSYNC_VolOp_command * vcom, FSSYNC_VolOp_info * info);
176 static int FSYNC_partMatch(FSSYNC_VolOp_command * vcom, Volume * vp, int match_anon);
180 * This lock controls access to the handler array. The overhead
181 * is minimal in non-preemptive environments.
183 struct Lock FSYNC_handler_lock;
188 #ifdef AFS_PTHREAD_ENV
190 pthread_attr_t tattr;
191 #else /* AFS_PTHREAD_ENV */
193 #endif /* AFS_PTHREAD_ENV */
195 Lock_Init(&FSYNC_handler_lock);
197 #ifdef AFS_PTHREAD_ENV
198 assert(pthread_attr_init(&tattr) == 0);
199 assert(pthread_attr_setdetachstate(&tattr, PTHREAD_CREATE_DETACHED) == 0);
200 assert(pthread_create(&tid, &tattr, FSYNC_sync, NULL) == 0);
201 #else /* AFS_PTHREAD_ENV */
202 assert(LWP_CreateProcess
203 (FSYNC_sync, USUAL_STACK_SIZE, USUAL_PRIORITY, (void *)0,
204 "FSYNC_sync", &pid) == LWP_SUCCESS);
205 #endif /* AFS_PTHREAD_ENV */
208 #if defined(HAVE_POLL) && defined(AFS_PTHREAD_ENV)
209 static struct pollfd FSYNC_readfds[MAXHANDLERS];
211 static fd_set FSYNC_readfds;
216 FSYNC_sync(void * args)
220 #ifdef AFS_PTHREAD_ENV
223 SYNC_server_state_t * state = &fssync_server_state;
224 #ifdef AFS_DEMAND_ATTACH_FS
225 VThreadOptions_t * thread_opts;
228 SYNC_getAddr(&state->endpoint, &state->addr);
229 SYNC_cleanupSock(state);
232 (void)signal(SIGPIPE, SIG_IGN);
235 #ifdef AFS_PTHREAD_ENV
236 /* set our 'thread-id' so that the host hold table works */
237 MUTEX_ENTER(&rx_stats_mutex); /* protects rxi_pthread_hinum */
238 tid = ++rxi_pthread_hinum;
239 MUTEX_EXIT(&rx_stats_mutex);
240 pthread_setspecific(rx_thread_id_key, (void *)tid);
241 Log("Set thread id %d for FSYNC_sync\n", tid);
242 #endif /* AFS_PTHREAD_ENV */
245 /* Let somebody else run until level > 0. That doesn't mean that
246 * all volumes have been attached. */
247 #ifdef AFS_PTHREAD_ENV
249 #else /* AFS_PTHREAD_ENV */
250 LWP_DispatchProcess();
251 #endif /* AFS_PTHREAD_ENV */
253 state->fd = SYNC_getSock(&state->endpoint);
254 code = SYNC_bindSock(state);
257 #ifdef AFS_DEMAND_ATTACH_FS
259 * make sure the volume package is incapable of recursively executing
260 * salvsync calls on this thread, since there is a possibility of
263 thread_opts = malloc(sizeof(VThreadOptions_t));
264 if (thread_opts == NULL) {
265 Log("failed to allocate memory for thread-specific volume package options structure\n");
268 memcpy(thread_opts, &VThread_defaults, sizeof(VThread_defaults));
269 thread_opts->disallow_salvsync = 1;
270 assert(pthread_setspecific(VThread_key, thread_opts) == 0);
277 #if defined(HAVE_POLL) && defined(AFS_PTHREAD_ENV)
279 GetHandler(FSYNC_readfds, MAXHANDLERS, POLLIN|POLLPRI, &nfds);
280 if (poll(FSYNC_readfds, nfds, -1) >=1)
281 CallHandler(FSYNC_readfds, nfds, POLLIN|POLLPRI);
284 GetHandler(&FSYNC_readfds, &maxfd);
285 /* Note: check for >= 1 below is essential since IOMGR_select
286 * doesn't have exactly same semantics as select.
288 #ifdef AFS_PTHREAD_ENV
289 if (select(maxfd + 1, &FSYNC_readfds, NULL, NULL, NULL) >= 1)
290 #else /* AFS_PTHREAD_ENV */
291 if (IOMGR_Select(maxfd + 1, &FSYNC_readfds, NULL, NULL, NULL) >= 1)
292 #endif /* AFS_PTHREAD_ENV */
293 CallHandler(&FSYNC_readfds);
296 return NULL; /* hush now, little gcc */
300 FSYNC_newconnection(osi_socket afd)
302 #ifdef USE_UNIX_SOCKETS
303 struct sockaddr_un other;
304 #else /* USE_UNIX_SOCKETS */
305 struct sockaddr_in other;
309 junk = sizeof(other);
310 fd = accept(afd, (struct sockaddr *)&other, &junk);
312 Log("FSYNC_newconnection: accept failed, errno==%d\n", errno);
314 } else if (!AddHandler(fd, FSYNC_com)) {
316 assert(AddHandler(fd, FSYNC_com));
320 /* this function processes commands from an fssync file descriptor (fd) */
321 afs_int32 FS_cnt = 0;
323 FSYNC_com(osi_socket fd)
327 SYNC_PROTO_BUF_DECL(com_buf);
328 SYNC_PROTO_BUF_DECL(res_buf);
330 memset(&res.hdr, 0, sizeof(res.hdr));
332 com.payload.buf = (void *)com_buf;
333 com.payload.len = SYNC_PROTO_MAX_LEN;
334 res.hdr.response_len = sizeof(res.hdr);
335 res.payload.len = SYNC_PROTO_MAX_LEN;
336 res.payload.buf = (void *)res_buf;
339 if (SYNC_getCom(&fssync_server_state, fd, &com)) {
340 Log("FSYNC_com: read failed; dropping connection (cnt=%d)\n", FS_cnt);
345 if (com.recv_len < sizeof(com.hdr)) {
346 Log("FSSYNC_com: invalid protocol message length (%u)\n", com.recv_len);
347 res.hdr.response = SYNC_COM_ERROR;
348 res.hdr.reason = SYNC_REASON_MALFORMED_PACKET;
349 res.hdr.flags |= SYNC_FLAG_CHANNEL_SHUTDOWN;
353 if (com.hdr.proto_version != FSYNC_PROTO_VERSION) {
354 Log("FSYNC_com: invalid protocol version (%u)\n", com.hdr.proto_version);
355 res.hdr.response = SYNC_COM_ERROR;
356 res.hdr.flags |= SYNC_FLAG_CHANNEL_SHUTDOWN;
360 if (com.hdr.command == SYNC_COM_CHANNEL_CLOSE) {
361 res.hdr.response = SYNC_OK;
362 res.hdr.flags |= SYNC_FLAG_CHANNEL_SHUTDOWN;
366 res.hdr.com_seq = com.hdr.com_seq;
369 switch (com.hdr.command) {
371 case FSYNC_VOL_ATTACH:
372 case FSYNC_VOL_LEAVE_OFF:
374 case FSYNC_VOL_FORCE_ERROR:
375 case FSYNC_VOL_LISTVOLUMES:
376 case FSYNC_VOL_NEEDVOLUME:
378 case FSYNC_VOL_BREAKCBKS:
380 case FSYNC_VOL_QUERY:
381 case FSYNC_VOL_QUERY_HDR:
382 case FSYNC_VOL_QUERY_VOP:
383 res.hdr.response = FSYNC_com_VolOp(fd, &com, &res);
385 case FSYNC_VOL_STATS_GENERAL:
386 case FSYNC_VOL_STATS_VICEP:
387 case FSYNC_VOL_STATS_HASH:
388 case FSYNC_VOL_STATS_HDR:
389 case FSYNC_VOL_STATS_VLRU:
390 res.hdr.response = FSYNC_com_StatsOp(fd, &com, &res);
392 case FSYNC_VOL_QUERY_VNODE:
393 res.hdr.response = FSYNC_com_VnQry(fd, &com, &res);
396 res.hdr.response = SYNC_BAD_COMMAND;
402 SYNC_putRes(&fssync_server_state, fd, &res);
403 if (res.hdr.flags & SYNC_FLAG_CHANNEL_SHUTDOWN) {
409 FSYNC_com_VolOp(osi_socket fd, SYNC_command * com, SYNC_response * res)
412 afs_int32 code = SYNC_OK;
413 FSSYNC_VolOp_command vcom;
415 if (com->recv_len != (sizeof(com->hdr) + sizeof(FSSYNC_VolOp_hdr))) {
416 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
417 res->hdr.flags |= SYNC_FLAG_CHANNEL_SHUTDOWN;
418 return SYNC_COM_ERROR;
421 vcom.hdr = &com->hdr;
422 vcom.vop = (FSSYNC_VolOp_hdr *) com->payload.buf;
425 vcom.volumes = OfflineVolumes[FindHandler(fd)];
426 for (vcom.v = NULL, i = 0; i < MAXOFFLINEVOLUMES; i++) {
427 if ((vcom.volumes[i].volumeID == vcom.vop->volume) &&
428 (strncmp(vcom.volumes[i].partName, vcom.vop->partName,
429 sizeof(vcom.volumes[i].partName)) == 0)) {
430 vcom.v = &vcom.volumes[i];
435 switch (com->hdr.command) {
437 case FSYNC_VOL_ATTACH:
438 case FSYNC_VOL_LEAVE_OFF:
439 code = FSYNC_com_VolOn(&vcom, res);
442 case FSYNC_VOL_NEEDVOLUME:
443 code = FSYNC_com_VolOff(&vcom, res);
445 case FSYNC_VOL_LISTVOLUMES:
449 code = FSYNC_com_VolMove(&vcom, res);
451 case FSYNC_VOL_BREAKCBKS:
452 code = FSYNC_com_VolBreakCBKs(&vcom, res);
455 code = FSYNC_com_VolDone(&vcom, res);
457 case FSYNC_VOL_QUERY:
458 code = FSYNC_com_VolQuery(&vcom, res);
460 case FSYNC_VOL_QUERY_HDR:
461 code = FSYNC_com_VolHdrQuery(&vcom, res);
463 #ifdef AFS_DEMAND_ATTACH_FS
464 case FSYNC_VOL_FORCE_ERROR:
465 code = FSYNC_com_VolError(&vcom, res);
467 case FSYNC_VOL_QUERY_VOP:
468 code = FSYNC_com_VolOpQuery(&vcom, res);
470 #endif /* AFS_DEMAND_ATTACH_FS */
472 code = SYNC_BAD_COMMAND;
479 * service an FSYNC request to bring a volume online.
481 * @param[in] vcom pointer command object
482 * @param[out] res object in which to store response packet
484 * @return operation status
485 * @retval SYNC_OK volume transitioned online
486 * @retval SYNC_FAILED invalid command protocol message
487 * @retval SYNC_DENIED operation could not be completed
489 * @note this is an FSYNC RPC server stub
491 * @note this procedure handles the following FSSYNC command codes:
494 * - FSYNC_VOL_LEAVE_OFF
496 * @note the supplementary reason code contains additional details.
497 * When SYNC_DENIED is returned, the specific reason is
498 * placed in the response packet reason field.
503 FSYNC_com_VolOn(FSSYNC_VolOp_command * vcom, SYNC_response * res)
505 afs_int32 code = SYNC_OK;
506 char tvolName[VMAXPATHLEN];
510 if (SYNC_verifyProtocolString(vcom->vop->partName, sizeof(vcom->vop->partName))) {
511 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
516 /* so, we need to attach the volume */
518 #ifdef AFS_DEMAND_ATTACH_FS
519 /* check DAFS permissions */
520 vp = VLookupVolume_r(&error, vcom->vop->volume, NULL);
522 FSYNC_partMatch(vcom, vp, 1) &&
523 vp->pending_vol_op &&
524 (vcom->hdr->programType != vp->pending_vol_op->com.programType)) {
525 /* a different program has this volume checked out. deny. */
526 Log("FSYNC_VolOn: WARNING: program type %u has attempted to manipulate "
527 "state for volume %u using command code %u while the volume is "
528 "checked out by program type %u for command code %u.\n",
529 vcom->hdr->programType,
532 vp->pending_vol_op->com.programType,
533 vp->pending_vol_op->com.command);
535 res->hdr.reason = FSYNC_EXCLUSIVE;
541 vcom->v->volumeID = 0;
544 if (vcom->hdr->command == FSYNC_VOL_LEAVE_OFF) {
545 /* nothing much to do if we're leaving the volume offline */
546 #ifdef AFS_DEMAND_ATTACH_FS
548 if (FSYNC_partMatch(vcom, vp, 1)) {
549 if ((V_attachState(vp) == VOL_STATE_UNATTACHED) ||
550 (V_attachState(vp) == VOL_STATE_PREATTACHED)) {
551 VChangeState_r(vp, VOL_STATE_UNATTACHED);
552 VDeregisterVolOp_r(vp);
555 res->hdr.reason = FSYNC_BAD_STATE;
559 res->hdr.reason = FSYNC_WRONG_PART;
563 res->hdr.reason = FSYNC_UNKNOWN_VOLID;
569 #ifdef AFS_DEMAND_ATTACH_FS
570 /* first, check to see whether we have such a volume defined */
571 vp = VPreAttachVolumeById_r(&error,
575 VDeregisterVolOp_r(vp);
577 #else /* !AFS_DEMAND_ATTACH_FS */
579 snprintf(&tvolName[1], sizeof(tvolName)-1, VFORMAT, afs_printable_uint32_lu(vcom->vop->volume));
580 tvolName[sizeof(tvolName)-1] = '\0';
582 vp = VAttachVolumeByName_r(&error, vcom->vop->partName, tvolName,
588 res->hdr.reason = error;
590 #endif /* !AFS_DEMAND_ATTACH_FS */
597 * service an FSYNC request to take a volume offline.
599 * @param[in] vcom pointer command object
600 * @param[out] res object in which to store response packet
602 * @return operation status
603 * @retval SYNC_OK volume transitioned offline
604 * @retval SYNC_FAILED invalid command protocol message
605 * @retval SYNC_DENIED operation could not be completed
607 * @note this is an FSYNC RPC server stub
609 * @note this procedure handles the following FSSYNC command codes:
611 * - FSYNC_VOL_NEEDVOLUME
613 * @note the supplementary reason code contains additional details.
614 * When SYNC_DENIED is returned, the specific reason is
615 * placed in the response packet reason field.
620 FSYNC_com_VolOff(FSSYNC_VolOp_command * vcom, SYNC_response * res)
622 FSSYNC_VolOp_info info;
623 afs_int32 code = SYNC_OK;
627 #ifdef AFS_DEMAND_ATTACH_FS
632 if (SYNC_verifyProtocolString(vcom->vop->partName, sizeof(vcom->vop->partName))) {
633 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
638 /* not already offline, we need to find a slot for newly offline volume */
639 if (vcom->hdr->programType == debugUtility) {
640 /* debug utilities do not have their operations tracked */
644 for (i = 0; i < MAXOFFLINEVOLUMES; i++) {
645 if (vcom->volumes[i].volumeID == 0) {
646 vcom->v = &vcom->volumes[i];
656 FSYNC_com_to_info(vcom, &info);
658 #ifdef AFS_DEMAND_ATTACH_FS
659 vp = VLookupVolume_r(&error, vcom->vop->volume, NULL);
661 vp = VGetVolume_r(&error, vcom->vop->volume);
665 if (!FSYNC_partMatch(vcom, vp, 1)) {
666 /* volume on desired partition is not online, so we
667 * should treat this as an offline volume.
669 #ifndef AFS_DEMAND_ATTACH_FS
677 #ifdef AFS_DEMAND_ATTACH_FS
679 ProgramType type = (ProgramType) vcom->hdr->programType;
681 /* do initial filtering of requests */
683 /* enforce mutual exclusion for volume ops */
684 if (vp->pending_vol_op) {
685 if (vp->pending_vol_op->com.programType != type) {
686 Log("volume %u already checked out\n", vp->hashid);
688 Log("vp->vop = { com = { ver=%u, prog=%d, com=%d, reason=%d, len=%u, flags=0x%x }, vop = { vol=%u, part='%s' } }\n",
689 vp->pending_vol_op->com.proto_version,
690 vp->pending_vol_op->com.programType,
691 vp->pending_vol_op->com.command,
692 vp->pending_vol_op->com.reason,
693 vp->pending_vol_op->com.command_len,
694 vp->pending_vol_op->com.flags,
695 vp->pending_vol_op->vop.volume,
696 vp->pending_vol_op->vop.partName );
697 Log("vcom = { com = { ver=%u, prog=%d, com=%d, reason=%d, len=%u, flags=0x%x } , vop = { vol=%u, part='%s' } }\n",
698 vcom->hdr->proto_version,
699 vcom->hdr->programType,
702 vcom->hdr->command_len,
705 vcom->vop->partName);
706 res->hdr.reason = FSYNC_EXCLUSIVE;
709 Log("warning: volume %u recursively checked out by programType id %d\n",
710 vp->hashid, vcom->hdr->programType);
714 /* filter based upon requestor
716 * volume utilities are not allowed to check out volumes
717 * which are in an error state
719 * unknown utility programs will be denied on principal
723 /* it is possible for the salvageserver to checkout a
724 * volume for salvage before its scheduling request
725 * has been sent to the salvageserver */
726 if (vp->salvage.requested && !vp->salvage.scheduled) {
727 vp->salvage.scheduled = 1;
733 if (VIsErrorState(V_attachState(vp))) {
736 if (vp->salvage.requested) {
742 Log("bad program type passed to FSSYNC\n");
746 /* short circuit for offline volume states
747 * so we can avoid I/O penalty of attachment */
748 switch (V_attachState(vp)) {
749 case VOL_STATE_UNATTACHED:
750 case VOL_STATE_PREATTACHED:
751 case VOL_STATE_SALVAGING:
752 case VOL_STATE_ERROR:
753 /* register the volume operation metadata with the volume
755 * if the volume is currently pre-attached, attach2()
756 * will evaluate the vol op metadata to determine whether
757 * attaching the volume would be safe */
758 VRegisterVolOp_r(vp, &info);
759 vp->pending_vol_op->vol_op_state = FSSYNC_VolOpRunningUnknown;
765 /* convert to heavyweight ref */
766 nvp = VGetVolumeByVp_r(&error, vp);
769 Log("FSYNC_com_VolOff: failed to get heavyweight reference to volume %u\n",
771 res->hdr.reason = FSYNC_VOL_PKG_ERROR;
773 } else if (nvp != vp) {
774 /* i don't think this should ever happen, but just in case... */
775 Log("FSYNC_com_VolOff: warning: potentially dangerous race detected\n");
779 /* register the volume operation metadata with the volume */
780 VRegisterVolOp_r(vp, &info);
783 #endif /* AFS_DEMAND_ATTACH_FS */
786 if (VVolOpLeaveOnline_r(vp, &info)) {
787 VUpdateVolume_r(&error, vp, VOL_UPDATE_WAIT); /* At least get volume stats right */
789 Log("FSYNC: Volume %u (%s) was left on line for an external %s request\n",
790 V_id(vp), V_name(vp),
791 vcom->hdr->reason == V_CLONE ? "clone" :
792 vcom->hdr->reason == V_READONLY ? "readonly" :
793 vcom->hdr->reason == V_DUMP ? "dump" :
796 #ifdef AFS_DEMAND_ATTACH_FS
797 vp->pending_vol_op->vol_op_state = FSSYNC_VolOpRunningOnline;
801 if (VVolOpSetVBusy_r(vp, &info)) {
802 vp->specialStatus = VBUSY;
805 /* remember what volume we got, so we can keep track of how
806 * many volumes the volserver or whatever is using. Note that
807 * vp is valid since leaveonline is only set when vp is valid.
810 vcom->v->volumeID = vcom->vop->volume;
811 strlcpy(vcom->v->partName, vp->partition->name, sizeof(vcom->v->partName));
814 #ifdef AFS_DEMAND_ATTACH_FS
815 VOfflineForVolOp_r(&error, vp, "A volume utility is running.");
817 assert(vp->nUsers==0);
818 vp->pending_vol_op->vol_op_state = FSSYNC_VolOpRunningOffline;
821 VDeregisterVolOp_r(vp);
825 VOffline_r(vp, "A volume utility is running.");
839 * service an FSYNC request to mark a volume as moved.
841 * @param[in] vcom pointer command object
842 * @param[out] res object in which to store response packet
844 * @return operation status
845 * @retval SYNC_OK volume marked as moved to a remote server
846 * @retval SYNC_FAILED invalid command protocol message
847 * @retval SYNC_DENIED current volume state does not permit this operation
849 * @note this is an FSYNC RPC server stub
851 * @note this operation also breaks all callbacks for the given volume
853 * @note this procedure handles the following FSSYNC command codes:
856 * @note the supplementary reason code contains additional details. For
857 * instance, SYNC_OK is still returned when the partition specified
858 * does not match the one registered in the volume object -- reason
859 * will be FSYNC_WRONG_PART in this case.
864 FSYNC_com_VolMove(FSSYNC_VolOp_command * vcom, SYNC_response * res)
866 afs_int32 code = SYNC_DENIED;
870 if (SYNC_verifyProtocolString(vcom->vop->partName, sizeof(vcom->vop->partName))) {
871 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
876 /* Yuch: the "reason" for the move is the site it got moved to... */
877 /* still set specialStatus so we stop sending back VBUSY.
878 * also should still break callbacks. Note that I don't know
879 * how to tell if we should break all or not, so we just do it
880 * since it doesn't matter much if we do an extra break
881 * volume callbacks on a volume move within the same server */
882 #ifdef AFS_DEMAND_ATTACH_FS
883 vp = VLookupVolume_r(&error, vcom->vop->volume, NULL);
885 vp = VGetVolume_r(&error, vcom->vop->volume);
888 if (FSYNC_partMatch(vcom, vp, 1)) {
889 #ifdef AFS_DEMAND_ATTACH_FS
890 if ((V_attachState(vp) == VOL_STATE_UNATTACHED) ||
891 (V_attachState(vp) == VOL_STATE_PREATTACHED)) {
894 vp->specialStatus = VMOVED;
895 #ifdef AFS_DEMAND_ATTACH_FS
897 res->hdr.reason = FSYNC_BAD_STATE;
901 res->hdr.reason = FSYNC_WRONG_PART;
905 res->hdr.reason = FSYNC_UNKNOWN_VOLID;
908 if ((code == SYNC_OK) && (V_BreakVolumeCallbacks != NULL)) {
909 Log("fssync: volume %u moved to %x; breaking all call backs\n",
910 vcom->vop->volume, vcom->hdr->reason);
912 (*V_BreakVolumeCallbacks) (vcom->vop->volume);
922 * service an FSYNC request to mark a volume as destroyed.
924 * @param[in] vcom pointer command object
925 * @param[out] res object in which to store response packet
927 * @return operation status
928 * @retval SYNC_OK volume marked as destroyed
929 * @retval SYNC_FAILED invalid command protocol message
930 * @retval SYNC_DENIED current volume state does not permit this operation
932 * @note this is an FSYNC RPC server stub
934 * @note this procedure handles the following FSSYNC command codes:
937 * @note the supplementary reason code contains additional details. For
938 * instance, SYNC_OK is still returned when the partition specified
939 * does not match the one registered in the volume object -- reason
940 * will be FSYNC_WRONG_PART in this case.
945 FSYNC_com_VolDone(FSSYNC_VolOp_command * vcom, SYNC_response * res)
947 afs_int32 code = SYNC_FAILED;
948 #ifdef AFS_DEMAND_ATTACH_FS
953 if (SYNC_verifyProtocolString(vcom->vop->partName, sizeof(vcom->vop->partName))) {
954 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
958 /* don't try to put online, this call is made only after deleting
959 * a volume, in which case we want to remove the vol # from the
960 * OfflineVolumes array only */
962 vcom->v->volumeID = 0;
964 #ifdef AFS_DEMAND_ATTACH_FS
965 vp = VLookupVolume_r(&error, vcom->vop->volume, NULL);
967 if (FSYNC_partMatch(vcom, vp, 1)) {
968 if ((V_attachState(vp) == VOL_STATE_UNATTACHED) ||
969 (V_attachState(vp) == VOL_STATE_PREATTACHED)) {
970 VChangeState_r(vp, VOL_STATE_UNATTACHED);
971 VDeregisterVolOp_r(vp);
975 res->hdr.reason = FSYNC_BAD_STATE;
978 code = SYNC_OK; /* XXX is this really a good idea? */
979 res->hdr.reason = FSYNC_WRONG_PART;
982 res->hdr.reason = FSYNC_UNKNOWN_VOLID;
990 #ifdef AFS_DEMAND_ATTACH_FS
992 * service an FSYNC request to transition a volume to the hard error state.
994 * @param[in] vcom pointer command object
995 * @param[out] res object in which to store response packet
997 * @return operation status
998 * @retval SYNC_OK volume transitioned to hard error state
999 * @retval SYNC_FAILED invalid command protocol message
1000 * @retval SYNC_DENIED (see note)
1002 * @note this is an FSYNC RPC server stub
1004 * @note this procedure handles the following FSSYNC command codes:
1005 * - FSYNC_VOL_FORCE_ERROR
1007 * @note SYNC_DENIED is returned in the following cases:
1008 * - no partition name is specified (reason field set to
1009 * FSYNC_WRONG_PART).
1010 * - volume id not known to fileserver (reason field set
1011 * to FSYNC_UNKNOWN_VOLID).
1013 * @note demand attach fileserver only
1018 FSYNC_com_VolError(FSSYNC_VolOp_command * vcom, SYNC_response * res)
1022 afs_int32 code = SYNC_FAILED;
1024 if (SYNC_verifyProtocolString(vcom->vop->partName, sizeof(vcom->vop->partName))) {
1025 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
1029 vp = VLookupVolume_r(&error, vcom->vop->volume, NULL);
1031 if (FSYNC_partMatch(vcom, vp, 0)) {
1032 /* null out salvsync control state, as it's no longer relevant */
1033 memset(&vp->salvage, 0, sizeof(vp->salvage));
1034 VChangeState_r(vp, VOL_STATE_ERROR);
1037 res->hdr.reason = FSYNC_WRONG_PART;
1040 res->hdr.reason = FSYNC_UNKNOWN_VOLID;
1046 #endif /* AFS_DEMAND_ATTACH_FS */
1049 * service an FSYNC request to break all callbacks for this volume.
1051 * @param[in] vcom pointer command object
1052 * @param[out] res object in which to store response packet
1054 * @return operation status
1055 * @retval SYNC_OK callback breaks scheduled for volume
1057 * @note this is an FSYNC RPC server stub
1059 * @note this procedure handles the following FSSYNC command codes:
1060 * - FSYNC_VOL_BREAKCBKS
1062 * @note demand attach fileserver only
1064 * @todo should do partition matching
1069 FSYNC_com_VolBreakCBKs(FSSYNC_VolOp_command * vcom, SYNC_response * res)
1071 /* if the volume is being restored, break all callbacks on it */
1072 if (V_BreakVolumeCallbacks) {
1073 Log("fssync: breaking all call backs for volume %u\n",
1076 (*V_BreakVolumeCallbacks) (vcom->vop->volume);
1083 * service an FSYNC request to return the Volume object.
1085 * @param[in] vcom pointer command object
1086 * @param[out] res object in which to store response packet
1088 * @return operation status
1089 * @retval SYNC_OK volume object returned to caller
1090 * @retval SYNC_FAILED bad command packet, or failed to locate volume object
1092 * @note this is an FSYNC RPC server stub
1094 * @note this procedure handles the following FSSYNC command codes:
1100 FSYNC_com_VolQuery(FSSYNC_VolOp_command * vcom, SYNC_response * res)
1102 afs_int32 code = SYNC_FAILED;
1106 if (SYNC_verifyProtocolString(vcom->vop->partName, sizeof(vcom->vop->partName))) {
1107 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
1111 #ifdef AFS_DEMAND_ATTACH_FS
1112 vp = VLookupVolume_r(&error, vcom->vop->volume, NULL);
1113 #else /* !AFS_DEMAND_ATTACH_FS */
1114 vp = VGetVolume_r(&error, vcom->vop->volume);
1115 #endif /* !AFS_DEMAND_ATTACH_FS */
1118 if (FSYNC_partMatch(vcom, vp, 1)) {
1119 if (res->payload.len >= sizeof(Volume)) {
1120 memcpy(res->payload.buf, vp, sizeof(Volume));
1121 res->hdr.response_len += sizeof(Volume);
1124 res->hdr.reason = SYNC_REASON_PAYLOAD_TOO_BIG;
1127 res->hdr.reason = FSYNC_WRONG_PART;
1129 #ifndef AFS_DEMAND_ATTACH_FS
1133 res->hdr.reason = FSYNC_UNKNOWN_VOLID;
1141 * service an FSYNC request to return the Volume header.
1143 * @param[in] vcom pointer command object
1144 * @param[out] res object in which to store response packet
1146 * @return operation status
1147 * @retval SYNC_OK volume header returned to caller
1148 * @retval SYNC_FAILED bad command packet, or failed to locate volume header
1150 * @note this is an FSYNC RPC server stub
1152 * @note this procedure handles the following FSSYNC command codes:
1153 * - FSYNC_VOL_QUERY_HDR
1158 FSYNC_com_VolHdrQuery(FSSYNC_VolOp_command * vcom, SYNC_response * res)
1160 afs_int32 code = SYNC_FAILED;
1164 if (SYNC_verifyProtocolString(vcom->vop->partName, sizeof(vcom->vop->partName))) {
1165 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
1168 if (res->payload.len < sizeof(VolumeDiskData)) {
1169 res->hdr.reason = SYNC_REASON_PAYLOAD_TOO_BIG;
1173 #ifdef AFS_DEMAND_ATTACH_FS
1174 vp = VLookupVolume_r(&error, vcom->vop->volume, NULL);
1175 #else /* !AFS_DEMAND_ATTACH_FS */
1176 vp = VGetVolume_r(&error, vcom->vop->volume);
1180 if (FSYNC_partMatch(vcom, vp, 1)) {
1181 #ifdef AFS_DEMAND_ATTACH_FS
1182 if ((vp->header == NULL) ||
1183 !(V_attachFlags(vp) & VOL_HDR_ATTACHED) ||
1184 !(V_attachFlags(vp) & VOL_HDR_LOADED)) {
1185 res->hdr.reason = FSYNC_HDR_NOT_ATTACHED;
1188 #else /* !AFS_DEMAND_ATTACH_FS */
1189 if (!vp || !vp->header) {
1190 res->hdr.reason = FSYNC_HDR_NOT_ATTACHED;
1193 #endif /* !AFS_DEMAND_ATTACH_FS */
1195 res->hdr.reason = FSYNC_WRONG_PART;
1199 res->hdr.reason = FSYNC_UNKNOWN_VOLID;
1203 memcpy(res->payload.buf, &V_disk(vp), sizeof(VolumeDiskData));
1204 res->hdr.response_len += sizeof(VolumeDiskData);
1205 #ifndef AFS_DEMAND_ATTACH_FS
1214 #ifdef AFS_DEMAND_ATTACH_FS
1216 FSYNC_com_VolOpQuery(FSSYNC_VolOp_command * vcom, SYNC_response * res)
1218 afs_int32 code = SYNC_OK;
1222 vp = VLookupVolume_r(&error, vcom->vop->volume, NULL);
1224 if (vp && vp->pending_vol_op) {
1225 assert(sizeof(FSSYNC_VolOp_info) <= res->payload.len);
1226 memcpy(res->payload.buf, vp->pending_vol_op, sizeof(FSSYNC_VolOp_info));
1227 res->hdr.response_len += sizeof(FSSYNC_VolOp_info);
1230 res->hdr.reason = FSYNC_NO_PENDING_VOL_OP;
1232 res->hdr.reason = FSYNC_UNKNOWN_VOLID;
1238 #endif /* AFS_DEMAND_ATTACH_FS */
1241 FSYNC_com_VnQry(osi_socket fd, SYNC_command * com, SYNC_response * res)
1243 afs_int32 code = SYNC_OK;
1244 FSSYNC_VnQry_hdr * qry = com->payload.buf;
1249 if (com->recv_len != (sizeof(com->hdr) + sizeof(FSSYNC_VnQry_hdr))) {
1250 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
1251 res->hdr.flags |= SYNC_FLAG_CHANNEL_SHUTDOWN;
1252 return SYNC_COM_ERROR;
1255 #ifdef AFS_DEMAND_ATTACH_FS
1256 vp = VLookupVolume_r(&error, qry->volume, NULL);
1257 #else /* !AFS_DEMAND_ATTACH_FS */
1258 vp = VGetVolume_r(&error, qry->volume);
1259 #endif /* !AFS_DEMAND_ATTACH_FS */
1262 res->hdr.reason = FSYNC_UNKNOWN_VOLID;
1267 vnp = VLookupVnode(vp, qry->vnode);
1269 res->hdr.reason = FSYNC_UNKNOWN_VNID;
1274 if (Vn_class(vnp)->residentSize > res->payload.len) {
1275 res->hdr.reason = SYNC_REASON_ENCODING_ERROR;
1280 memcpy(res->payload.buf, vnp, Vn_class(vnp)->residentSize);
1281 res->hdr.response_len += Vn_class(vnp)->residentSize;
1284 #ifndef AFS_DEMAND_ATTACH_FS
1293 FSYNC_com_StatsOp(osi_socket fd, SYNC_command * com, SYNC_response * res)
1295 afs_int32 code = SYNC_OK;
1296 FSSYNC_StatsOp_command scom;
1298 if (com->recv_len != (sizeof(com->hdr) + sizeof(FSSYNC_StatsOp_hdr))) {
1299 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
1300 res->hdr.flags |= SYNC_FLAG_CHANNEL_SHUTDOWN;
1301 return SYNC_COM_ERROR;
1304 scom.hdr = &com->hdr;
1305 scom.sop = (FSSYNC_StatsOp_hdr *) com->payload.buf;
1308 switch (com->hdr.command) {
1309 case FSYNC_VOL_STATS_GENERAL:
1310 code = FSYNC_com_StatsOpGeneral(&scom, res);
1312 #ifdef AFS_DEMAND_ATTACH_FS
1313 /* statistics for the following subsystems are only tracked
1314 * for demand attach fileservers */
1315 case FSYNC_VOL_STATS_VICEP:
1316 code = FSYNC_com_StatsOpViceP(&scom, res);
1318 case FSYNC_VOL_STATS_HASH:
1319 code = FSYNC_com_StatsOpHash(&scom, res);
1321 case FSYNC_VOL_STATS_HDR:
1322 code = FSYNC_com_StatsOpHdr(&scom, res);
1324 case FSYNC_VOL_STATS_VLRU:
1325 code = FSYNC_com_StatsOpVLRU(&scom, res);
1327 #endif /* AFS_DEMAND_ATTACH_FS */
1329 code = SYNC_BAD_COMMAND;
1336 FSYNC_com_StatsOpGeneral(FSSYNC_StatsOp_command * scom, SYNC_response * res)
1338 afs_int32 code = SYNC_OK;
1340 memcpy(res->payload.buf, &VStats, sizeof(VStats));
1341 res->hdr.response_len += sizeof(VStats);
1346 #ifdef AFS_DEMAND_ATTACH_FS
1348 FSYNC_com_StatsOpViceP(FSSYNC_StatsOp_command * scom, SYNC_response * res)
1350 afs_int32 code = SYNC_OK;
1351 struct DiskPartition64 * dp;
1352 struct DiskPartitionStats64 * stats;
1354 if (SYNC_verifyProtocolString(scom->sop->args.partName, sizeof(scom->sop->args.partName))) {
1355 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
1360 dp = VGetPartition_r(scom->sop->args.partName, 0);
1364 stats = (struct DiskPartitionStats64 *) res->payload.buf;
1365 stats->free = dp->free;
1366 stats->totalUsable = dp->totalUsable;
1367 stats->minFree = dp->minFree;
1368 stats->f_files = dp->f_files;
1369 stats->vol_list_len = dp->vol_list.len;
1371 res->hdr.response_len += sizeof(struct DiskPartitionStats64);
1379 FSYNC_com_StatsOpHash(FSSYNC_StatsOp_command * scom, SYNC_response * res)
1381 afs_int32 code = SYNC_OK;
1382 struct VolumeHashChainStats * stats;
1383 struct VolumeHashChainHead * head;
1385 if (scom->sop->args.hash_bucket >= VolumeHashTable.Size) {
1389 head = &VolumeHashTable.Table[scom->sop->args.hash_bucket];
1390 stats = (struct VolumeHashChainStats *) res->payload.buf;
1391 stats->table_size = VolumeHashTable.Size;
1392 stats->chain_len = head->len;
1393 stats->chain_cacheCheck = head->cacheCheck;
1394 stats->chain_busy = head->busy;
1395 AssignInt64(head->looks, &stats->chain_looks);
1396 AssignInt64(head->gets, &stats->chain_gets);
1397 AssignInt64(head->reorders, &stats->chain_reorders);
1399 res->hdr.response_len += sizeof(struct VolumeHashChainStats);
1405 FSYNC_com_StatsOpHdr(FSSYNC_StatsOp_command * scom, SYNC_response * res)
1407 afs_int32 code = SYNC_OK;
1409 memcpy(res->payload.buf, &volume_hdr_LRU.stats, sizeof(volume_hdr_LRU.stats));
1410 res->hdr.response_len += sizeof(volume_hdr_LRU.stats);
1416 FSYNC_com_StatsOpVLRU(FSSYNC_StatsOp_command * scom, SYNC_response * res)
1418 afs_int32 code = SYNC_OK;
1420 code = SYNC_BAD_COMMAND;
1424 #endif /* AFS_DEMAND_ATTACH_FS */
1427 * populate an FSSYNC_VolOp_info object from a command packet object.
1429 * @param[in] vcom pointer to command packet
1430 * @param[out] info pointer to info object which will be populated
1432 * @note FSSYNC_VolOp_info objects are attached to Volume objects when
1433 * a volume operation is commenced.
1438 FSYNC_com_to_info(FSSYNC_VolOp_command * vcom, FSSYNC_VolOp_info * info)
1440 memcpy(&info->com, vcom->hdr, sizeof(SYNC_command_hdr));
1441 memcpy(&info->vop, vcom->vop, sizeof(FSSYNC_VolOp_hdr));
1442 info->vol_op_state = FSSYNC_VolOpPending;
1446 * check whether command packet partition name matches volume
1447 * object's partition name.
1449 * @param[in] vcom pointer to command packet
1450 * @param[in] vp pointer to volume object
1451 * @param[in] match_anon anon matching control flag (see note below)
1453 * @return whether partitions match
1454 * @retval 0 partitions do NOT match
1455 * @retval 1 partitions match
1457 * @note if match_anon is non-zero, then this function will return a
1458 * positive match for a zero-length partition string in the
1464 FSYNC_partMatch(FSSYNC_VolOp_command * vcom, Volume * vp, int match_anon)
1466 return ((match_anon && vcom->vop->partName[0] == 0) ||
1467 (strncmp(vcom->vop->partName, V_partition(vp)->name,
1468 sizeof(vcom->vop->partName)) == 0));
1473 FSYNC_Drop(osi_socket fd)
1475 struct offlineInfo *p;
1478 char tvolName[VMAXPATHLEN];
1481 p = OfflineVolumes[FindHandler(fd)];
1482 for (i = 0; i < MAXOFFLINEVOLUMES; i++) {
1483 if (p[i].volumeID) {
1488 sprintf(&tvolName[1], VFORMAT, afs_printable_uint32_lu(p[i].volumeID));
1489 vp = VAttachVolumeByName_r(&error, p[i].partName, tvolName,
1506 static int AcceptHandler = -1; /* handler id for accept, if turned on */
1511 if (AcceptHandler == -1) {
1512 assert(AddHandler(fssync_server_state.fd, FSYNC_newconnection));
1513 AcceptHandler = FindHandler(fssync_server_state.fd);
1520 if (AcceptHandler != -1) {
1521 assert(RemoveHandler(fssync_server_state.fd));
1526 /* The multiple FD handling code. */
1528 static osi_socket HandlerFD[MAXHANDLERS];
1529 static void (*HandlerProc[MAXHANDLERS]) (osi_socket);
1535 ObtainWriteLock(&FSYNC_handler_lock);
1536 for (i = 0; i < MAXHANDLERS; i++) {
1540 ReleaseWriteLock(&FSYNC_handler_lock);
1543 #if defined(HAVE_POLL) && defined(AFS_PTHREAD_ENV)
1545 CallHandler(struct pollfd *fds, int nfds, int mask)
1549 ObtainReadLock(&FSYNC_handler_lock);
1550 for (i = 0; i < nfds; i++) {
1551 if (fds[i].revents & mask) {
1552 handler = FindHandler_r(fds[i].fd);
1553 ReleaseReadLock(&FSYNC_handler_lock);
1554 (*HandlerProc[handler]) (fds[i].fd);
1555 ObtainReadLock(&FSYNC_handler_lock);
1558 ReleaseReadLock(&FSYNC_handler_lock);
1562 CallHandler(fd_set * fdsetp)
1565 ObtainReadLock(&FSYNC_handler_lock);
1566 for (i = 0; i < MAXHANDLERS; i++) {
1567 if (HandlerFD[i] >= 0 && FD_ISSET(HandlerFD[i], fdsetp)) {
1568 ReleaseReadLock(&FSYNC_handler_lock);
1569 (*HandlerProc[i]) (HandlerFD[i]);
1570 ObtainReadLock(&FSYNC_handler_lock);
1573 ReleaseReadLock(&FSYNC_handler_lock);
1578 AddHandler(osi_socket afd, void (*aproc) (osi_socket))
1581 ObtainWriteLock(&FSYNC_handler_lock);
1582 for (i = 0; i < MAXHANDLERS; i++)
1583 if (HandlerFD[i] == -1)
1585 if (i >= MAXHANDLERS) {
1586 ReleaseWriteLock(&FSYNC_handler_lock);
1590 HandlerProc[i] = aproc;
1591 ReleaseWriteLock(&FSYNC_handler_lock);
1596 FindHandler(register osi_socket afd)
1599 ObtainReadLock(&FSYNC_handler_lock);
1600 for (i = 0; i < MAXHANDLERS; i++)
1601 if (HandlerFD[i] == afd) {
1602 ReleaseReadLock(&FSYNC_handler_lock);
1605 ReleaseReadLock(&FSYNC_handler_lock); /* just in case */
1607 return -1; /* satisfy compiler */
1611 FindHandler_r(register osi_socket afd)
1614 for (i = 0; i < MAXHANDLERS; i++)
1615 if (HandlerFD[i] == afd) {
1619 return -1; /* satisfy compiler */
1623 RemoveHandler(register osi_socket afd)
1625 ObtainWriteLock(&FSYNC_handler_lock);
1626 HandlerFD[FindHandler_r(afd)] = -1;
1627 ReleaseWriteLock(&FSYNC_handler_lock);
1631 #if defined(HAVE_POLL) && defined(AFS_PTHREAD_ENV)
1633 GetHandler(struct pollfd *fds, int maxfds, int events, int *nfds)
1637 ObtainReadLock(&FSYNC_handler_lock);
1638 for (i = 0; i < MAXHANDLERS; i++)
1639 if (HandlerFD[i] != -1) {
1641 fds[fdi].fd = HandlerFD[i];
1642 fds[fdi].events = events;
1643 fds[fdi].revents = 0;
1647 ReleaseReadLock(&FSYNC_handler_lock);
1651 GetHandler(fd_set * fdsetp, int *maxfdp)
1654 register int maxfd = -1;
1656 ObtainReadLock(&FSYNC_handler_lock); /* just in case */
1657 for (i = 0; i < MAXHANDLERS; i++)
1658 if (HandlerFD[i] != -1) {
1659 FD_SET(HandlerFD[i], fdsetp);
1660 #ifndef AFS_NT40_ENV
1661 /* On Windows the nfds parameter to select() is ignored */
1662 if (maxfd < HandlerFD[i] || maxfd == (int)-1)
1663 maxfd = HandlerFD[i];
1664 #endif /* AFS_NT40_ENV */
1667 ReleaseReadLock(&FSYNC_handler_lock); /* just in case */
1669 #endif /* HAVE_POLL && AFS_PTHREAD_ENV */
1671 #endif /* FSSYNC_BUILD_SERVER */