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 *)(intptr_t)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;
364 /* don't respond, just drop; senders of SYNC_COM_CHANNEL_CLOSE
365 * never wait for a response. */
369 res.hdr.com_seq = com.hdr.com_seq;
372 switch (com.hdr.command) {
374 case FSYNC_VOL_ATTACH:
375 case FSYNC_VOL_LEAVE_OFF:
377 case FSYNC_VOL_FORCE_ERROR:
378 case FSYNC_VOL_LISTVOLUMES:
379 case FSYNC_VOL_NEEDVOLUME:
381 case FSYNC_VOL_BREAKCBKS:
383 case FSYNC_VOL_QUERY:
384 case FSYNC_VOL_QUERY_HDR:
385 case FSYNC_VOL_QUERY_VOP:
386 res.hdr.response = FSYNC_com_VolOp(fd, &com, &res);
388 case FSYNC_VOL_STATS_GENERAL:
389 case FSYNC_VOL_STATS_VICEP:
390 case FSYNC_VOL_STATS_HASH:
391 case FSYNC_VOL_STATS_HDR:
392 case FSYNC_VOL_STATS_VLRU:
393 res.hdr.response = FSYNC_com_StatsOp(fd, &com, &res);
395 case FSYNC_VOL_QUERY_VNODE:
396 res.hdr.response = FSYNC_com_VnQry(fd, &com, &res);
399 res.hdr.response = SYNC_BAD_COMMAND;
405 SYNC_putRes(&fssync_server_state, fd, &res);
408 if (res.hdr.flags & SYNC_FLAG_CHANNEL_SHUTDOWN) {
414 FSYNC_com_VolOp(osi_socket fd, SYNC_command * com, SYNC_response * res)
417 afs_int32 code = SYNC_OK;
418 FSSYNC_VolOp_command vcom;
420 if (com->recv_len != (sizeof(com->hdr) + sizeof(FSSYNC_VolOp_hdr))) {
421 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
422 res->hdr.flags |= SYNC_FLAG_CHANNEL_SHUTDOWN;
423 return SYNC_COM_ERROR;
426 vcom.hdr = &com->hdr;
427 vcom.vop = (FSSYNC_VolOp_hdr *) com->payload.buf;
430 vcom.volumes = OfflineVolumes[FindHandler(fd)];
431 for (vcom.v = NULL, i = 0; i < MAXOFFLINEVOLUMES; i++) {
432 if ((vcom.volumes[i].volumeID == vcom.vop->volume) &&
433 (strncmp(vcom.volumes[i].partName, vcom.vop->partName,
434 sizeof(vcom.volumes[i].partName)) == 0)) {
435 vcom.v = &vcom.volumes[i];
440 switch (com->hdr.command) {
442 case FSYNC_VOL_ATTACH:
443 case FSYNC_VOL_LEAVE_OFF:
444 code = FSYNC_com_VolOn(&vcom, res);
447 case FSYNC_VOL_NEEDVOLUME:
448 code = FSYNC_com_VolOff(&vcom, res);
450 case FSYNC_VOL_LISTVOLUMES:
454 code = FSYNC_com_VolMove(&vcom, res);
456 case FSYNC_VOL_BREAKCBKS:
457 code = FSYNC_com_VolBreakCBKs(&vcom, res);
460 code = FSYNC_com_VolDone(&vcom, res);
462 case FSYNC_VOL_QUERY:
463 code = FSYNC_com_VolQuery(&vcom, res);
465 case FSYNC_VOL_QUERY_HDR:
466 code = FSYNC_com_VolHdrQuery(&vcom, res);
468 #ifdef AFS_DEMAND_ATTACH_FS
469 case FSYNC_VOL_FORCE_ERROR:
470 code = FSYNC_com_VolError(&vcom, res);
472 case FSYNC_VOL_QUERY_VOP:
473 code = FSYNC_com_VolOpQuery(&vcom, res);
475 #endif /* AFS_DEMAND_ATTACH_FS */
477 code = SYNC_BAD_COMMAND;
484 * service an FSYNC request to bring a volume online.
486 * @param[in] vcom pointer command object
487 * @param[out] res object in which to store response packet
489 * @return operation status
490 * @retval SYNC_OK volume transitioned online
491 * @retval SYNC_FAILED invalid command protocol message
492 * @retval SYNC_DENIED operation could not be completed
494 * @note this is an FSYNC RPC server stub
496 * @note this procedure handles the following FSSYNC command codes:
499 * - FSYNC_VOL_LEAVE_OFF
501 * @note the supplementary reason code contains additional details.
502 * When SYNC_DENIED is returned, the specific reason is
503 * placed in the response packet reason field.
508 FSYNC_com_VolOn(FSSYNC_VolOp_command * vcom, SYNC_response * res)
510 afs_int32 code = SYNC_OK;
511 char tvolName[VMAXPATHLEN];
515 if (SYNC_verifyProtocolString(vcom->vop->partName, sizeof(vcom->vop->partName))) {
516 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
521 /* so, we need to attach the volume */
523 #ifdef AFS_DEMAND_ATTACH_FS
524 /* check DAFS permissions */
525 vp = VLookupVolume_r(&error, vcom->vop->volume, NULL);
527 FSYNC_partMatch(vcom, vp, 1) &&
528 vp->pending_vol_op &&
529 (vcom->hdr->programType != vp->pending_vol_op->com.programType)) {
530 /* a different program has this volume checked out. deny. */
531 Log("FSYNC_VolOn: WARNING: program type %u has attempted to manipulate "
532 "state for volume %u using command code %u while the volume is "
533 "checked out by program type %u for command code %u.\n",
534 vcom->hdr->programType,
537 vp->pending_vol_op->com.programType,
538 vp->pending_vol_op->com.command);
540 res->hdr.reason = FSYNC_EXCLUSIVE;
546 vcom->v->volumeID = 0;
549 if (vcom->hdr->command == FSYNC_VOL_LEAVE_OFF) {
550 /* nothing much to do if we're leaving the volume offline */
551 #ifdef AFS_DEMAND_ATTACH_FS
553 if (FSYNC_partMatch(vcom, vp, 1)) {
554 if ((V_attachState(vp) == VOL_STATE_UNATTACHED) ||
555 (V_attachState(vp) == VOL_STATE_PREATTACHED)) {
556 VChangeState_r(vp, VOL_STATE_UNATTACHED);
557 VDeregisterVolOp_r(vp);
560 res->hdr.reason = FSYNC_BAD_STATE;
564 res->hdr.reason = FSYNC_WRONG_PART;
568 res->hdr.reason = FSYNC_UNKNOWN_VOLID;
574 #ifdef AFS_DEMAND_ATTACH_FS
575 /* first, check to see whether we have such a volume defined */
576 vp = VPreAttachVolumeById_r(&error,
580 VDeregisterVolOp_r(vp);
582 #else /* !AFS_DEMAND_ATTACH_FS */
584 snprintf(&tvolName[1], sizeof(tvolName)-1, VFORMAT, afs_printable_uint32_lu(vcom->vop->volume));
585 tvolName[sizeof(tvolName)-1] = '\0';
587 vp = VAttachVolumeByName_r(&error, vcom->vop->partName, tvolName,
593 res->hdr.reason = error;
595 #endif /* !AFS_DEMAND_ATTACH_FS */
602 * service an FSYNC request to take a volume offline.
604 * @param[in] vcom pointer command object
605 * @param[out] res object in which to store response packet
607 * @return operation status
608 * @retval SYNC_OK volume transitioned offline
609 * @retval SYNC_FAILED invalid command protocol message
610 * @retval SYNC_DENIED operation could not be completed
612 * @note this is an FSYNC RPC server stub
614 * @note this procedure handles the following FSSYNC command codes:
616 * - FSYNC_VOL_NEEDVOLUME
618 * @note the supplementary reason code contains additional details.
619 * When SYNC_DENIED is returned, the specific reason is
620 * placed in the response packet reason field.
625 FSYNC_com_VolOff(FSSYNC_VolOp_command * vcom, SYNC_response * res)
627 FSSYNC_VolOp_info info;
628 afs_int32 code = SYNC_OK;
632 #ifdef AFS_DEMAND_ATTACH_FS
637 if (SYNC_verifyProtocolString(vcom->vop->partName, sizeof(vcom->vop->partName))) {
638 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
643 /* not already offline, we need to find a slot for newly offline volume */
644 if (vcom->hdr->programType == debugUtility) {
645 /* debug utilities do not have their operations tracked */
649 for (i = 0; i < MAXOFFLINEVOLUMES; i++) {
650 if (vcom->volumes[i].volumeID == 0) {
651 vcom->v = &vcom->volumes[i];
661 FSYNC_com_to_info(vcom, &info);
663 #ifdef AFS_DEMAND_ATTACH_FS
664 vp = VLookupVolume_r(&error, vcom->vop->volume, NULL);
666 vp = VGetVolume_r(&error, vcom->vop->volume);
670 if (!FSYNC_partMatch(vcom, vp, 1)) {
671 /* volume on desired partition is not online, so we
672 * should treat this as an offline volume.
674 #ifndef AFS_DEMAND_ATTACH_FS
682 #ifdef AFS_DEMAND_ATTACH_FS
684 ProgramType type = (ProgramType) vcom->hdr->programType;
686 /* do initial filtering of requests */
688 /* enforce mutual exclusion for volume ops */
689 if (vp->pending_vol_op) {
690 if (vp->pending_vol_op->com.programType != type) {
691 Log("volume %u already checked out\n", vp->hashid);
693 Log("vp->vop = { com = { ver=%u, prog=%d, com=%d, reason=%d, len=%u, flags=0x%x }, vop = { vol=%u, part='%s' } }\n",
694 vp->pending_vol_op->com.proto_version,
695 vp->pending_vol_op->com.programType,
696 vp->pending_vol_op->com.command,
697 vp->pending_vol_op->com.reason,
698 vp->pending_vol_op->com.command_len,
699 vp->pending_vol_op->com.flags,
700 vp->pending_vol_op->vop.volume,
701 vp->pending_vol_op->vop.partName );
702 Log("vcom = { com = { ver=%u, prog=%d, com=%d, reason=%d, len=%u, flags=0x%x } , vop = { vol=%u, part='%s' } }\n",
703 vcom->hdr->proto_version,
704 vcom->hdr->programType,
707 vcom->hdr->command_len,
710 vcom->vop->partName);
711 res->hdr.reason = FSYNC_EXCLUSIVE;
714 Log("warning: volume %u recursively checked out by programType id %d\n",
715 vp->hashid, vcom->hdr->programType);
719 /* filter based upon requestor
721 * volume utilities are not allowed to check out volumes
722 * which are in an error state
724 * unknown utility programs will be denied on principal
728 /* it is possible for the salvageserver to checkout a
729 * volume for salvage before its scheduling request
730 * has been sent to the salvageserver */
731 if (vp->salvage.requested && !vp->salvage.scheduled) {
732 vp->salvage.scheduled = 1;
738 if (VIsErrorState(V_attachState(vp))) {
741 if (vp->salvage.requested) {
747 Log("bad program type passed to FSSYNC\n");
751 /* short circuit for offline volume states
752 * so we can avoid I/O penalty of attachment */
753 switch (V_attachState(vp)) {
754 case VOL_STATE_UNATTACHED:
755 case VOL_STATE_PREATTACHED:
756 case VOL_STATE_SALVAGING:
757 case VOL_STATE_ERROR:
758 /* register the volume operation metadata with the volume
760 * if the volume is currently pre-attached, attach2()
761 * will evaluate the vol op metadata to determine whether
762 * attaching the volume would be safe */
763 VRegisterVolOp_r(vp, &info);
764 vp->pending_vol_op->vol_op_state = FSSYNC_VolOpRunningUnknown;
770 /* convert to heavyweight ref */
771 nvp = VGetVolumeByVp_r(&error, vp);
774 Log("FSYNC_com_VolOff: failed to get heavyweight reference to volume %u\n",
776 res->hdr.reason = FSYNC_VOL_PKG_ERROR;
778 } else if (nvp != vp) {
779 /* i don't think this should ever happen, but just in case... */
780 Log("FSYNC_com_VolOff: warning: potentially dangerous race detected\n");
784 /* register the volume operation metadata with the volume */
785 VRegisterVolOp_r(vp, &info);
788 #endif /* AFS_DEMAND_ATTACH_FS */
791 if (VVolOpLeaveOnline_r(vp, &info)) {
792 VUpdateVolume_r(&error, vp, VOL_UPDATE_WAIT); /* At least get volume stats right */
794 Log("FSYNC: Volume %u (%s) was left on line for an external %s request\n",
795 V_id(vp), V_name(vp),
796 vcom->hdr->reason == V_CLONE ? "clone" :
797 vcom->hdr->reason == V_READONLY ? "readonly" :
798 vcom->hdr->reason == V_DUMP ? "dump" :
801 #ifdef AFS_DEMAND_ATTACH_FS
802 vp->pending_vol_op->vol_op_state = FSSYNC_VolOpRunningOnline;
806 if (VVolOpSetVBusy_r(vp, &info)) {
807 vp->specialStatus = VBUSY;
810 /* remember what volume we got, so we can keep track of how
811 * many volumes the volserver or whatever is using. Note that
812 * vp is valid since leaveonline is only set when vp is valid.
815 vcom->v->volumeID = vcom->vop->volume;
816 strlcpy(vcom->v->partName, vp->partition->name, sizeof(vcom->v->partName));
819 #ifdef AFS_DEMAND_ATTACH_FS
820 VOfflineForVolOp_r(&error, vp, "A volume utility is running.");
822 assert(vp->nUsers==0);
823 vp->pending_vol_op->vol_op_state = FSSYNC_VolOpRunningOffline;
826 VDeregisterVolOp_r(vp);
830 VOffline_r(vp, "A volume utility is running.");
844 * service an FSYNC request to mark a volume as moved.
846 * @param[in] vcom pointer command object
847 * @param[out] res object in which to store response packet
849 * @return operation status
850 * @retval SYNC_OK volume marked as moved to a remote server
851 * @retval SYNC_FAILED invalid command protocol message
852 * @retval SYNC_DENIED current volume state does not permit this operation
854 * @note this is an FSYNC RPC server stub
856 * @note this operation also breaks all callbacks for the given volume
858 * @note this procedure handles the following FSSYNC command codes:
861 * @note the supplementary reason code contains additional details. For
862 * instance, SYNC_OK is still returned when the partition specified
863 * does not match the one registered in the volume object -- reason
864 * will be FSYNC_WRONG_PART in this case.
869 FSYNC_com_VolMove(FSSYNC_VolOp_command * vcom, SYNC_response * res)
871 afs_int32 code = SYNC_DENIED;
875 if (SYNC_verifyProtocolString(vcom->vop->partName, sizeof(vcom->vop->partName))) {
876 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
881 /* Yuch: the "reason" for the move is the site it got moved to... */
882 /* still set specialStatus so we stop sending back VBUSY.
883 * also should still break callbacks. Note that I don't know
884 * how to tell if we should break all or not, so we just do it
885 * since it doesn't matter much if we do an extra break
886 * volume callbacks on a volume move within the same server */
887 #ifdef AFS_DEMAND_ATTACH_FS
888 vp = VLookupVolume_r(&error, vcom->vop->volume, NULL);
890 vp = VGetVolume_r(&error, vcom->vop->volume);
893 if (FSYNC_partMatch(vcom, vp, 1)) {
894 #ifdef AFS_DEMAND_ATTACH_FS
895 if ((V_attachState(vp) == VOL_STATE_UNATTACHED) ||
896 (V_attachState(vp) == VOL_STATE_PREATTACHED)) {
899 vp->specialStatus = VMOVED;
900 #ifdef AFS_DEMAND_ATTACH_FS
902 res->hdr.reason = FSYNC_BAD_STATE;
906 res->hdr.reason = FSYNC_WRONG_PART;
908 #ifndef AFS_DEMAND_ATTACH_FS
910 #endif /* !AFS_DEMAND_ATTACH_FS */
912 res->hdr.reason = FSYNC_UNKNOWN_VOLID;
915 if ((code == SYNC_OK) && (V_BreakVolumeCallbacks != NULL)) {
916 Log("fssync: volume %u moved to %x; breaking all call backs\n",
917 vcom->vop->volume, vcom->hdr->reason);
919 (*V_BreakVolumeCallbacks) (vcom->vop->volume);
929 * service an FSYNC request to mark a volume as destroyed.
931 * @param[in] vcom pointer command object
932 * @param[out] res object in which to store response packet
934 * @return operation status
935 * @retval SYNC_OK volume marked as destroyed
936 * @retval SYNC_FAILED invalid command protocol message
937 * @retval SYNC_DENIED current volume state does not permit this operation
939 * @note this is an FSYNC RPC server stub
941 * @note this procedure handles the following FSSYNC command codes:
944 * @note the supplementary reason code contains additional details. For
945 * instance, SYNC_OK is still returned when the partition specified
946 * does not match the one registered in the volume object -- reason
947 * will be FSYNC_WRONG_PART in this case.
952 FSYNC_com_VolDone(FSSYNC_VolOp_command * vcom, SYNC_response * res)
954 afs_int32 code = SYNC_FAILED;
955 #ifdef AFS_DEMAND_ATTACH_FS
960 if (SYNC_verifyProtocolString(vcom->vop->partName, sizeof(vcom->vop->partName))) {
961 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
965 /* don't try to put online, this call is made only after deleting
966 * a volume, in which case we want to remove the vol # from the
967 * OfflineVolumes array only */
969 vcom->v->volumeID = 0;
971 #ifdef AFS_DEMAND_ATTACH_FS
972 vp = VLookupVolume_r(&error, vcom->vop->volume, NULL);
974 if (FSYNC_partMatch(vcom, vp, 1)) {
975 if ((V_attachState(vp) == VOL_STATE_UNATTACHED) ||
976 (V_attachState(vp) == VOL_STATE_PREATTACHED)) {
977 VChangeState_r(vp, VOL_STATE_UNATTACHED);
978 VDeregisterVolOp_r(vp);
982 res->hdr.reason = FSYNC_BAD_STATE;
985 code = SYNC_OK; /* XXX is this really a good idea? */
986 res->hdr.reason = FSYNC_WRONG_PART;
989 res->hdr.reason = FSYNC_UNKNOWN_VOLID;
997 #ifdef AFS_DEMAND_ATTACH_FS
999 * service an FSYNC request to transition a volume to the hard error state.
1001 * @param[in] vcom pointer command object
1002 * @param[out] res object in which to store response packet
1004 * @return operation status
1005 * @retval SYNC_OK volume transitioned to hard error state
1006 * @retval SYNC_FAILED invalid command protocol message
1007 * @retval SYNC_DENIED (see note)
1009 * @note this is an FSYNC RPC server stub
1011 * @note this procedure handles the following FSSYNC command codes:
1012 * - FSYNC_VOL_FORCE_ERROR
1014 * @note SYNC_DENIED is returned in the following cases:
1015 * - no partition name is specified (reason field set to
1016 * FSYNC_WRONG_PART).
1017 * - volume id not known to fileserver (reason field set
1018 * to FSYNC_UNKNOWN_VOLID).
1020 * @note demand attach fileserver only
1025 FSYNC_com_VolError(FSSYNC_VolOp_command * vcom, SYNC_response * res)
1029 afs_int32 code = SYNC_FAILED;
1031 if (SYNC_verifyProtocolString(vcom->vop->partName, sizeof(vcom->vop->partName))) {
1032 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
1036 vp = VLookupVolume_r(&error, vcom->vop->volume, NULL);
1038 if (FSYNC_partMatch(vcom, vp, 0)) {
1039 /* null out salvsync control state, as it's no longer relevant */
1040 memset(&vp->salvage, 0, sizeof(vp->salvage));
1041 VChangeState_r(vp, VOL_STATE_ERROR);
1044 res->hdr.reason = FSYNC_WRONG_PART;
1047 res->hdr.reason = FSYNC_UNKNOWN_VOLID;
1053 #endif /* AFS_DEMAND_ATTACH_FS */
1056 * service an FSYNC request to break all callbacks for this volume.
1058 * @param[in] vcom pointer command object
1059 * @param[out] res object in which to store response packet
1061 * @return operation status
1062 * @retval SYNC_OK callback breaks scheduled for volume
1064 * @note this is an FSYNC RPC server stub
1066 * @note this procedure handles the following FSSYNC command codes:
1067 * - FSYNC_VOL_BREAKCBKS
1069 * @note demand attach fileserver only
1071 * @todo should do partition matching
1076 FSYNC_com_VolBreakCBKs(FSSYNC_VolOp_command * vcom, SYNC_response * res)
1078 /* if the volume is being restored, break all callbacks on it */
1079 if (V_BreakVolumeCallbacks) {
1080 Log("fssync: breaking all call backs for volume %u\n",
1083 (*V_BreakVolumeCallbacks) (vcom->vop->volume);
1090 * service an FSYNC request to return the Volume object.
1092 * @param[in] vcom pointer command object
1093 * @param[out] res object in which to store response packet
1095 * @return operation status
1096 * @retval SYNC_OK volume object returned to caller
1097 * @retval SYNC_FAILED bad command packet, or failed to locate volume object
1099 * @note this is an FSYNC RPC server stub
1101 * @note this procedure handles the following FSSYNC command codes:
1107 FSYNC_com_VolQuery(FSSYNC_VolOp_command * vcom, SYNC_response * res)
1109 afs_int32 code = SYNC_FAILED;
1113 if (SYNC_verifyProtocolString(vcom->vop->partName, sizeof(vcom->vop->partName))) {
1114 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
1118 #ifdef AFS_DEMAND_ATTACH_FS
1119 vp = VLookupVolume_r(&error, vcom->vop->volume, NULL);
1120 #else /* !AFS_DEMAND_ATTACH_FS */
1121 vp = VGetVolume_r(&error, vcom->vop->volume);
1122 #endif /* !AFS_DEMAND_ATTACH_FS */
1125 if (FSYNC_partMatch(vcom, vp, 1)) {
1126 if (res->payload.len >= sizeof(Volume)) {
1127 memcpy(res->payload.buf, vp, sizeof(Volume));
1128 res->hdr.response_len += sizeof(Volume);
1131 res->hdr.reason = SYNC_REASON_PAYLOAD_TOO_BIG;
1134 res->hdr.reason = FSYNC_WRONG_PART;
1136 #ifndef AFS_DEMAND_ATTACH_FS
1140 res->hdr.reason = FSYNC_UNKNOWN_VOLID;
1148 * service an FSYNC request to return the Volume header.
1150 * @param[in] vcom pointer command object
1151 * @param[out] res object in which to store response packet
1153 * @return operation status
1154 * @retval SYNC_OK volume header returned to caller
1155 * @retval SYNC_FAILED bad command packet, or failed to locate volume header
1157 * @note this is an FSYNC RPC server stub
1159 * @note this procedure handles the following FSSYNC command codes:
1160 * - FSYNC_VOL_QUERY_HDR
1165 FSYNC_com_VolHdrQuery(FSSYNC_VolOp_command * vcom, SYNC_response * res)
1167 afs_int32 code = SYNC_FAILED;
1171 if (SYNC_verifyProtocolString(vcom->vop->partName, sizeof(vcom->vop->partName))) {
1172 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
1175 if (res->payload.len < sizeof(VolumeDiskData)) {
1176 res->hdr.reason = SYNC_REASON_PAYLOAD_TOO_BIG;
1180 #ifdef AFS_DEMAND_ATTACH_FS
1181 vp = VLookupVolume_r(&error, vcom->vop->volume, NULL);
1182 #else /* !AFS_DEMAND_ATTACH_FS */
1183 vp = VGetVolume_r(&error, vcom->vop->volume);
1187 if (FSYNC_partMatch(vcom, vp, 1)) {
1188 #ifdef AFS_DEMAND_ATTACH_FS
1189 if ((vp->header == NULL) ||
1190 !(V_attachFlags(vp) & VOL_HDR_ATTACHED) ||
1191 !(V_attachFlags(vp) & VOL_HDR_LOADED)) {
1192 res->hdr.reason = FSYNC_HDR_NOT_ATTACHED;
1195 #else /* !AFS_DEMAND_ATTACH_FS */
1196 if (!vp || !vp->header) {
1197 res->hdr.reason = FSYNC_HDR_NOT_ATTACHED;
1200 #endif /* !AFS_DEMAND_ATTACH_FS */
1202 res->hdr.reason = FSYNC_WRONG_PART;
1206 res->hdr.reason = FSYNC_UNKNOWN_VOLID;
1210 memcpy(res->payload.buf, &V_disk(vp), sizeof(VolumeDiskData));
1211 res->hdr.response_len += sizeof(VolumeDiskData);
1215 #ifndef AFS_DEMAND_ATTACH_FS
1223 #ifdef AFS_DEMAND_ATTACH_FS
1225 FSYNC_com_VolOpQuery(FSSYNC_VolOp_command * vcom, SYNC_response * res)
1227 afs_int32 code = SYNC_OK;
1231 vp = VLookupVolume_r(&error, vcom->vop->volume, NULL);
1233 if (vp && vp->pending_vol_op) {
1234 assert(sizeof(FSSYNC_VolOp_info) <= res->payload.len);
1235 memcpy(res->payload.buf, vp->pending_vol_op, sizeof(FSSYNC_VolOp_info));
1236 res->hdr.response_len += sizeof(FSSYNC_VolOp_info);
1239 res->hdr.reason = FSYNC_NO_PENDING_VOL_OP;
1241 res->hdr.reason = FSYNC_UNKNOWN_VOLID;
1247 #endif /* AFS_DEMAND_ATTACH_FS */
1250 FSYNC_com_VnQry(osi_socket fd, SYNC_command * com, SYNC_response * res)
1252 afs_int32 code = SYNC_OK;
1253 FSSYNC_VnQry_hdr * qry = com->payload.buf;
1258 if (com->recv_len != (sizeof(com->hdr) + sizeof(FSSYNC_VnQry_hdr))) {
1259 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
1260 res->hdr.flags |= SYNC_FLAG_CHANNEL_SHUTDOWN;
1261 return SYNC_COM_ERROR;
1264 #ifdef AFS_DEMAND_ATTACH_FS
1265 vp = VLookupVolume_r(&error, qry->volume, NULL);
1266 #else /* !AFS_DEMAND_ATTACH_FS */
1267 vp = VGetVolume_r(&error, qry->volume);
1268 #endif /* !AFS_DEMAND_ATTACH_FS */
1271 res->hdr.reason = FSYNC_UNKNOWN_VOLID;
1276 vnp = VLookupVnode(vp, qry->vnode);
1278 res->hdr.reason = FSYNC_UNKNOWN_VNID;
1283 if (Vn_class(vnp)->residentSize > res->payload.len) {
1284 res->hdr.reason = SYNC_REASON_ENCODING_ERROR;
1289 memcpy(res->payload.buf, vnp, Vn_class(vnp)->residentSize);
1290 res->hdr.response_len += Vn_class(vnp)->residentSize;
1293 #ifndef AFS_DEMAND_ATTACH_FS
1302 FSYNC_com_StatsOp(osi_socket fd, SYNC_command * com, SYNC_response * res)
1304 afs_int32 code = SYNC_OK;
1305 FSSYNC_StatsOp_command scom;
1307 if (com->recv_len != (sizeof(com->hdr) + sizeof(FSSYNC_StatsOp_hdr))) {
1308 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
1309 res->hdr.flags |= SYNC_FLAG_CHANNEL_SHUTDOWN;
1310 return SYNC_COM_ERROR;
1313 scom.hdr = &com->hdr;
1314 scom.sop = (FSSYNC_StatsOp_hdr *) com->payload.buf;
1317 switch (com->hdr.command) {
1318 case FSYNC_VOL_STATS_GENERAL:
1319 code = FSYNC_com_StatsOpGeneral(&scom, res);
1321 #ifdef AFS_DEMAND_ATTACH_FS
1322 /* statistics for the following subsystems are only tracked
1323 * for demand attach fileservers */
1324 case FSYNC_VOL_STATS_VICEP:
1325 code = FSYNC_com_StatsOpViceP(&scom, res);
1327 case FSYNC_VOL_STATS_HASH:
1328 code = FSYNC_com_StatsOpHash(&scom, res);
1330 case FSYNC_VOL_STATS_HDR:
1331 code = FSYNC_com_StatsOpHdr(&scom, res);
1333 case FSYNC_VOL_STATS_VLRU:
1334 code = FSYNC_com_StatsOpVLRU(&scom, res);
1336 #endif /* AFS_DEMAND_ATTACH_FS */
1338 code = SYNC_BAD_COMMAND;
1345 FSYNC_com_StatsOpGeneral(FSSYNC_StatsOp_command * scom, SYNC_response * res)
1347 afs_int32 code = SYNC_OK;
1349 memcpy(res->payload.buf, &VStats, sizeof(VStats));
1350 res->hdr.response_len += sizeof(VStats);
1355 #ifdef AFS_DEMAND_ATTACH_FS
1357 FSYNC_com_StatsOpViceP(FSSYNC_StatsOp_command * scom, SYNC_response * res)
1359 afs_int32 code = SYNC_OK;
1360 struct DiskPartition64 * dp;
1361 struct DiskPartitionStats64 * stats;
1363 if (SYNC_verifyProtocolString(scom->sop->args.partName, sizeof(scom->sop->args.partName))) {
1364 res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
1369 dp = VGetPartition_r(scom->sop->args.partName, 0);
1373 stats = (struct DiskPartitionStats64 *) res->payload.buf;
1374 stats->free = dp->free;
1375 stats->totalUsable = dp->totalUsable;
1376 stats->minFree = dp->minFree;
1377 stats->f_files = dp->f_files;
1378 stats->vol_list_len = dp->vol_list.len;
1380 res->hdr.response_len += sizeof(struct DiskPartitionStats64);
1388 FSYNC_com_StatsOpHash(FSSYNC_StatsOp_command * scom, SYNC_response * res)
1390 afs_int32 code = SYNC_OK;
1391 struct VolumeHashChainStats * stats;
1392 struct VolumeHashChainHead * head;
1394 if (scom->sop->args.hash_bucket >= VolumeHashTable.Size) {
1398 head = &VolumeHashTable.Table[scom->sop->args.hash_bucket];
1399 stats = (struct VolumeHashChainStats *) res->payload.buf;
1400 stats->table_size = VolumeHashTable.Size;
1401 stats->chain_len = head->len;
1402 stats->chain_cacheCheck = head->cacheCheck;
1403 stats->chain_busy = head->busy;
1404 AssignInt64(head->looks, &stats->chain_looks);
1405 AssignInt64(head->gets, &stats->chain_gets);
1406 AssignInt64(head->reorders, &stats->chain_reorders);
1408 res->hdr.response_len += sizeof(struct VolumeHashChainStats);
1414 FSYNC_com_StatsOpHdr(FSSYNC_StatsOp_command * scom, SYNC_response * res)
1416 afs_int32 code = SYNC_OK;
1418 memcpy(res->payload.buf, &volume_hdr_LRU.stats, sizeof(volume_hdr_LRU.stats));
1419 res->hdr.response_len += sizeof(volume_hdr_LRU.stats);
1425 FSYNC_com_StatsOpVLRU(FSSYNC_StatsOp_command * scom, SYNC_response * res)
1427 afs_int32 code = SYNC_OK;
1429 code = SYNC_BAD_COMMAND;
1433 #endif /* AFS_DEMAND_ATTACH_FS */
1436 * populate an FSSYNC_VolOp_info object from a command packet object.
1438 * @param[in] vcom pointer to command packet
1439 * @param[out] info pointer to info object which will be populated
1441 * @note FSSYNC_VolOp_info objects are attached to Volume objects when
1442 * a volume operation is commenced.
1447 FSYNC_com_to_info(FSSYNC_VolOp_command * vcom, FSSYNC_VolOp_info * info)
1449 memcpy(&info->com, vcom->hdr, sizeof(SYNC_command_hdr));
1450 memcpy(&info->vop, vcom->vop, sizeof(FSSYNC_VolOp_hdr));
1451 info->vol_op_state = FSSYNC_VolOpPending;
1455 * check whether command packet partition name matches volume
1456 * object's partition name.
1458 * @param[in] vcom pointer to command packet
1459 * @param[in] vp pointer to volume object
1460 * @param[in] match_anon anon matching control flag (see note below)
1462 * @return whether partitions match
1463 * @retval 0 partitions do NOT match
1464 * @retval 1 partitions match
1466 * @note if match_anon is non-zero, then this function will return a
1467 * positive match for a zero-length partition string in the
1473 FSYNC_partMatch(FSSYNC_VolOp_command * vcom, Volume * vp, int match_anon)
1475 return ((match_anon && vcom->vop->partName[0] == 0) ||
1476 (strncmp(vcom->vop->partName, V_partition(vp)->name,
1477 sizeof(vcom->vop->partName)) == 0));
1482 FSYNC_Drop(osi_socket fd)
1484 struct offlineInfo *p;
1487 char tvolName[VMAXPATHLEN];
1490 p = OfflineVolumes[FindHandler(fd)];
1491 for (i = 0; i < MAXOFFLINEVOLUMES; i++) {
1492 if (p[i].volumeID) {
1497 sprintf(&tvolName[1], VFORMAT, afs_printable_uint32_lu(p[i].volumeID));
1498 vp = VAttachVolumeByName_r(&error, p[i].partName, tvolName,
1515 static int AcceptHandler = -1; /* handler id for accept, if turned on */
1520 if (AcceptHandler == -1) {
1521 assert(AddHandler(fssync_server_state.fd, FSYNC_newconnection));
1522 AcceptHandler = FindHandler(fssync_server_state.fd);
1529 if (AcceptHandler != -1) {
1530 assert(RemoveHandler(fssync_server_state.fd));
1535 /* The multiple FD handling code. */
1537 static osi_socket HandlerFD[MAXHANDLERS];
1538 static void (*HandlerProc[MAXHANDLERS]) (osi_socket);
1544 ObtainWriteLock(&FSYNC_handler_lock);
1545 for (i = 0; i < MAXHANDLERS; i++) {
1549 ReleaseWriteLock(&FSYNC_handler_lock);
1552 #if defined(HAVE_POLL) && defined(AFS_PTHREAD_ENV)
1554 CallHandler(struct pollfd *fds, int nfds, int mask)
1558 ObtainReadLock(&FSYNC_handler_lock);
1559 for (i = 0; i < nfds; i++) {
1560 if (fds[i].revents & mask) {
1561 handler = FindHandler_r(fds[i].fd);
1562 ReleaseReadLock(&FSYNC_handler_lock);
1563 (*HandlerProc[handler]) (fds[i].fd);
1564 ObtainReadLock(&FSYNC_handler_lock);
1567 ReleaseReadLock(&FSYNC_handler_lock);
1571 CallHandler(fd_set * fdsetp)
1574 ObtainReadLock(&FSYNC_handler_lock);
1575 for (i = 0; i < MAXHANDLERS; i++) {
1576 if (HandlerFD[i] >= 0 && FD_ISSET(HandlerFD[i], fdsetp)) {
1577 ReleaseReadLock(&FSYNC_handler_lock);
1578 (*HandlerProc[i]) (HandlerFD[i]);
1579 ObtainReadLock(&FSYNC_handler_lock);
1582 ReleaseReadLock(&FSYNC_handler_lock);
1587 AddHandler(osi_socket afd, void (*aproc) (osi_socket))
1590 ObtainWriteLock(&FSYNC_handler_lock);
1591 for (i = 0; i < MAXHANDLERS; i++)
1592 if (HandlerFD[i] == -1)
1594 if (i >= MAXHANDLERS) {
1595 ReleaseWriteLock(&FSYNC_handler_lock);
1599 HandlerProc[i] = aproc;
1600 ReleaseWriteLock(&FSYNC_handler_lock);
1605 FindHandler(register osi_socket afd)
1608 ObtainReadLock(&FSYNC_handler_lock);
1609 for (i = 0; i < MAXHANDLERS; i++)
1610 if (HandlerFD[i] == afd) {
1611 ReleaseReadLock(&FSYNC_handler_lock);
1614 ReleaseReadLock(&FSYNC_handler_lock); /* just in case */
1616 return -1; /* satisfy compiler */
1620 FindHandler_r(register osi_socket afd)
1623 for (i = 0; i < MAXHANDLERS; i++)
1624 if (HandlerFD[i] == afd) {
1628 return -1; /* satisfy compiler */
1632 RemoveHandler(register osi_socket afd)
1634 ObtainWriteLock(&FSYNC_handler_lock);
1635 HandlerFD[FindHandler_r(afd)] = -1;
1636 ReleaseWriteLock(&FSYNC_handler_lock);
1640 #if defined(HAVE_POLL) && defined(AFS_PTHREAD_ENV)
1642 GetHandler(struct pollfd *fds, int maxfds, int events, int *nfds)
1646 ObtainReadLock(&FSYNC_handler_lock);
1647 for (i = 0; i < MAXHANDLERS; i++)
1648 if (HandlerFD[i] != -1) {
1650 fds[fdi].fd = HandlerFD[i];
1651 fds[fdi].events = events;
1652 fds[fdi].revents = 0;
1656 ReleaseReadLock(&FSYNC_handler_lock);
1660 GetHandler(fd_set * fdsetp, int *maxfdp)
1663 register int maxfd = -1;
1665 ObtainReadLock(&FSYNC_handler_lock); /* just in case */
1666 for (i = 0; i < MAXHANDLERS; i++)
1667 if (HandlerFD[i] != -1) {
1668 FD_SET(HandlerFD[i], fdsetp);
1669 #ifndef AFS_NT40_ENV
1670 /* On Windows the nfds parameter to select() is ignored */
1671 if (maxfd < HandlerFD[i] || maxfd == (int)-1)
1672 maxfd = HandlerFD[i];
1673 #endif /* AFS_NT40_ENV */
1676 ReleaseReadLock(&FSYNC_handler_lock); /* just in case */
1678 #endif /* HAVE_POLL && AFS_PTHREAD_ENV */
1680 #endif /* FSSYNC_BUILD_SERVER */