Institution: The Information Technology Center, Carnegie-Mellon University
*/
-#ifdef notdef
-
-/* All this is going away in early 1989 */
-int newVLDB; /* Compatibility flag */
-
-#endif
-static int newVLDB = 1;
-
-
#ifndef AFS_PTHREAD_ENV
#define USUAL_PRIORITY (LWP_MAX_PRIORITY - 2)
#include <afsconfig.h>
#include <afs/param.h>
-RCSID
- ("$Header$");
#include <sys/types.h>
#include <stdio.h>
#include <netinet/in.h>
#include <netdb.h>
#include <sys/time.h>
+#include <unistd.h>
#endif
#include <errno.h>
#ifdef AFS_PTHREAD_ENV
/*@printflike@*/ extern void Log(const char *format, ...);
-#ifdef osi_Assert
-#undef osi_Assert
-#endif
-#define osi_Assert(e) (void)(e)
-
-int (*V_BreakVolumeCallbacks) ();
+int (*V_BreakVolumeCallbacks) (VolumeId volume);
#define MAXHANDLERS 4 /* Up to 4 clients; must be at least 2, so that
* move = dump+restore can run on single server */
/* Forward declarations */
static void * FSYNC_sync(void *);
-static void FSYNC_newconnection();
-static void FSYNC_com();
-static void FSYNC_Drop();
-static void AcceptOn();
-static void AcceptOff();
-static void InitHandler();
-static int AddHandler();
-static int FindHandler();
-static int FindHandler_r();
-static int RemoveHandler();
+static void FSYNC_newconnection(osi_socket afd);
+static void FSYNC_com(osi_socket fd);
+static void FSYNC_Drop(osi_socket fd);
+static void AcceptOn(void);
+static void AcceptOff(void);
+static void InitHandler(void);
+static int AddHandler(osi_socket fd, void (*aproc)(osi_socket));
+static int FindHandler(osi_socket afd);
+static int FindHandler_r(osi_socket afd);
+static int RemoveHandler(osi_socket afd);
#if defined(HAVE_POLL) && defined (AFS_PTHREAD_ENV)
static void CallHandler(struct pollfd *fds, int nfds, int mask);
static void GetHandler(struct pollfd *fds, int maxfds, int events, int *nfds);
#endif
extern int LogLevel;
-static afs_int32 FSYNC_com_VolOp(int fd, SYNC_command * com, SYNC_response * res);
+static afs_int32 FSYNC_com_VolOp(osi_socket fd, SYNC_command * com, SYNC_response * res);
+#ifdef AFS_DEMAND_ATTACH_FS
static afs_int32 FSYNC_com_VolError(FSSYNC_VolOp_command * com, SYNC_response * res);
+#endif
static afs_int32 FSYNC_com_VolOn(FSSYNC_VolOp_command * com, SYNC_response * res);
static afs_int32 FSYNC_com_VolOff(FSSYNC_VolOp_command * com, SYNC_response * res);
static afs_int32 FSYNC_com_VolMove(FSSYNC_VolOp_command * com, SYNC_response * res);
static afs_int32 FSYNC_com_VolOpQuery(FSSYNC_VolOp_command * com, SYNC_response * res);
#endif /* AFS_DEMAND_ATTACH_FS */
-static afs_int32 FSYNC_com_VnQry(int fd, SYNC_command * com, SYNC_response * res);
+static afs_int32 FSYNC_com_VnQry(osi_socket fd, SYNC_command * com, SYNC_response * res);
-static afs_int32 FSYNC_com_StatsOp(int fd, SYNC_command * com, SYNC_response * res);
+static afs_int32 FSYNC_com_StatsOp(osi_socket fd, SYNC_command * com, SYNC_response * res);
static afs_int32 FSYNC_com_StatsOpGeneral(FSSYNC_StatsOp_command * scom, SYNC_response * res);
+
+#ifdef AFS_DEMAND_ATTACH_FS
static afs_int32 FSYNC_com_StatsOpViceP(FSSYNC_StatsOp_command * scom, SYNC_response * res);
static afs_int32 FSYNC_com_StatsOpHash(FSSYNC_StatsOp_command * scom, SYNC_response * res);
static afs_int32 FSYNC_com_StatsOpHdr(FSSYNC_StatsOp_command * scom, SYNC_response * res);
static afs_int32 FSYNC_com_StatsOpVLRU(FSSYNC_StatsOp_command * scom, SYNC_response * res);
-
+#endif
static void FSYNC_com_to_info(FSSYNC_VolOp_command * vcom, FSSYNC_VolOp_info * info);
+static int FSYNC_partMatch(FSSYNC_VolOp_command * vcom, Volume * vp, int match_anon);
+
/*
* This lock controls access to the handler array. The overhead
static void *
FSYNC_sync(void * args)
{
-#ifdef USE_UNIX_SOCKETS
- char tbuffer[AFSDIR_PATH_MAX];
-#endif /* USE_UNIX_SOCKETS */
- int on = 1;
extern int VInit;
int code;
- int numTries;
#ifdef AFS_PTHREAD_ENV
int tid;
#endif
SYNC_server_state_t * state = &fssync_server_state;
+#ifdef AFS_DEMAND_ATTACH_FS
+ VThreadOptions_t * thread_opts;
+#endif
SYNC_getAddr(&state->endpoint, &state->addr);
SYNC_cleanupSock(state);
LWP_DispatchProcess();
#endif /* AFS_PTHREAD_ENV */
}
-
state->fd = SYNC_getSock(&state->endpoint);
code = SYNC_bindSock(state);
assert(!code);
+#ifdef AFS_DEMAND_ATTACH_FS
+ /*
+ * make sure the volume package is incapable of recursively executing
+ * salvsync calls on this thread, since there is a possibility of
+ * deadlock.
+ */
+ thread_opts = malloc(sizeof(VThreadOptions_t));
+ if (thread_opts == NULL) {
+ Log("failed to allocate memory for thread-specific volume package options structure\n");
+ return NULL;
+ }
+ memcpy(thread_opts, &VThread_defaults, sizeof(VThread_defaults));
+ thread_opts->disallow_salvsync = 1;
+ assert(pthread_setspecific(VThread_key, thread_opts) == 0);
+#endif
+
InitHandler();
AcceptOn();
CallHandler(&FSYNC_readfds);
#endif
}
+ return NULL; /* hush now, little gcc */
}
static void
-FSYNC_newconnection(int afd)
+FSYNC_newconnection(osi_socket afd)
{
#ifdef USE_UNIX_SOCKETS
struct sockaddr_un other;
#else /* USE_UNIX_SOCKETS */
struct sockaddr_in other;
#endif
- int junk, fd;
+ osi_socket fd;
+ socklen_t junk;
junk = sizeof(other);
fd = accept(afd, (struct sockaddr *)&other, &junk);
if (fd == -1) {
/* this function processes commands from an fssync file descriptor (fd) */
afs_int32 FS_cnt = 0;
static void
-FSYNC_com(int fd)
+FSYNC_com(osi_socket fd)
{
SYNC_command com;
SYNC_response res;
com.payload.buf = (void *)com_buf;
com.payload.len = SYNC_PROTO_MAX_LEN;
res.hdr.response_len = sizeof(res.hdr);
- res.hdr.proto_version = FSYNC_PROTO_VERSION;
res.payload.len = SYNC_PROTO_MAX_LEN;
res.payload.buf = (void *)res_buf;
FS_cnt++;
- if (SYNC_getCom(fd, &com)) {
+ if (SYNC_getCom(&fssync_server_state, fd, &com)) {
Log("FSYNC_com: read failed; dropping connection (cnt=%d)\n", FS_cnt);
FSYNC_Drop(fd);
return;
if (com.hdr.command == SYNC_COM_CHANNEL_CLOSE) {
res.hdr.response = SYNC_OK;
res.hdr.flags |= SYNC_FLAG_CHANNEL_SHUTDOWN;
- goto respond;
+
+ /* don't respond, just drop; senders of SYNC_COM_CHANNEL_CLOSE
+ * never wait for a response. */
+ goto done;
}
+ res.hdr.com_seq = com.hdr.com_seq;
VOL_LOCK;
switch (com.hdr.command) {
VOL_UNLOCK;
respond:
- SYNC_putRes(fd, &res);
+ SYNC_putRes(&fssync_server_state, fd, &res);
+
+ done:
if (res.hdr.flags & SYNC_FLAG_CHANNEL_SHUTDOWN) {
FSYNC_Drop(fd);
}
}
static afs_int32
-FSYNC_com_VolOp(int fd, SYNC_command * com, SYNC_response * res)
+FSYNC_com_VolOp(osi_socket fd, SYNC_command * com, SYNC_response * res)
{
int i;
afs_int32 code = SYNC_OK;
return code;
}
+/**
+ * service an FSYNC request to bring a volume online.
+ *
+ * @param[in] vcom pointer command object
+ * @param[out] res object in which to store response packet
+ *
+ * @return operation status
+ * @retval SYNC_OK volume transitioned online
+ * @retval SYNC_FAILED invalid command protocol message
+ * @retval SYNC_DENIED operation could not be completed
+ *
+ * @note this is an FSYNC RPC server stub
+ *
+ * @note this procedure handles the following FSSYNC command codes:
+ * - FSYNC_VOL_ON
+ * - FSYNC_VOL_ATTACH
+ * - FSYNC_VOL_LEAVE_OFF
+ *
+ * @note the supplementary reason code contains additional details.
+ * When SYNC_DENIED is returned, the specific reason is
+ * placed in the response packet reason field.
+ *
+ * @internal
+ */
static afs_int32
FSYNC_com_VolOn(FSSYNC_VolOp_command * vcom, SYNC_response * res)
{
goto done;
}
- /*
- This is where a detatched volume gets reattached. However in the
- special case where the volume is merely busy, it is already
- attatched and it is only necessary to clear the busy flag. See
- defect #2080 for details.
- */
-
- /* is the volume already attatched? */
-#ifdef notdef
- /*
- * XXX With the following enabled we had bizarre problems where the backup id would
- * be reset to 0; that was due to the interaction between fileserver/volserver in that they
- * both keep volumes in memory and the changes wouldn't be made to the fileserver. Some of
- * the problems were due to refcnt changes as result of VGetVolume/VPutVolume which would call
- * VOffline, etc. when we don't want to; someday the whole #2080 issue should be revisited to
- * be done right XXX
- */
- vp = VGetVolume_r(&error, vcom->vop->volume);
- if (vp) {
- /* yep, is the BUSY flag set? */
- if (vp->specialStatus == VBUSY) {
-
- /* yep, clear BUSY flag */
-
- vp->specialStatus = 0;
- /* make sure vol is online */
- if (vcom->v) {
- vcom->v->volumeID = 0;
- V_inUse(vp) = 1; /* online */
- }
- VPutVolume_r(vp);
- break;
- }
- VPutVolume_r(vp);
- }
-#endif /* notdef */
-
/* so, we need to attach the volume */
#ifdef AFS_DEMAND_ATTACH_FS
/* check DAFS permissions */
vp = VLookupVolume_r(&error, vcom->vop->volume, NULL);
- if (vp && !strcmp(VPartitionPath(V_partition(vp)), vcom->vop->partName) &&
+ if (vp &&
+ FSYNC_partMatch(vcom, vp, 1) &&
vp->pending_vol_op &&
(vcom->hdr->programType != vp->pending_vol_op->com.programType)) {
/* a different program has this volume checked out. deny. */
if (vcom->hdr->command == FSYNC_VOL_LEAVE_OFF) {
/* nothing much to do if we're leaving the volume offline */
#ifdef AFS_DEMAND_ATTACH_FS
- if (vp &&
- !strcmp(VPartitionPath(V_partition(vp)), vcom->vop->partName)) {
- VDeregisterVolOp_r(vp);
- VChangeState_r(vp, VOL_STATE_UNATTACHED);
+ if (vp) {
+ if (FSYNC_partMatch(vcom, vp, 1)) {
+ if ((V_attachState(vp) == VOL_STATE_UNATTACHED) ||
+ (V_attachState(vp) == VOL_STATE_PREATTACHED)) {
+ VChangeState_r(vp, VOL_STATE_UNATTACHED);
+ VDeregisterVolOp_r(vp);
+ } else {
+ code = SYNC_DENIED;
+ res->hdr.reason = FSYNC_BAD_STATE;
+ }
+ } else {
+ code = SYNC_DENIED;
+ res->hdr.reason = FSYNC_WRONG_PART;
+ }
+ } else {
+ code = SYNC_DENIED;
+ res->hdr.reason = FSYNC_UNKNOWN_VOLID;
}
#endif
goto done;
}
#else /* !AFS_DEMAND_ATTACH_FS */
tvolName[0] = '/';
- snprintf(&tvolName[1], sizeof(tvolName)-1, VFORMAT, vcom->vop->volume);
+ snprintf(&tvolName[1], sizeof(tvolName)-1, VFORMAT, afs_printable_uint32_lu(vcom->vop->volume));
tvolName[sizeof(tvolName)-1] = '\0';
vp = VAttachVolumeByName_r(&error, vcom->vop->partName, tvolName,
return code;
}
+/**
+ * service an FSYNC request to take a volume offline.
+ *
+ * @param[in] vcom pointer command object
+ * @param[out] res object in which to store response packet
+ *
+ * @return operation status
+ * @retval SYNC_OK volume transitioned offline
+ * @retval SYNC_FAILED invalid command protocol message
+ * @retval SYNC_DENIED operation could not be completed
+ *
+ * @note this is an FSYNC RPC server stub
+ *
+ * @note this procedure handles the following FSSYNC command codes:
+ * - FSYNC_VOL_OFF
+ * - FSYNC_VOL_NEEDVOLUME
+ *
+ * @note the supplementary reason code contains additional details.
+ * When SYNC_DENIED is returned, the specific reason is
+ * placed in the response packet reason field.
+ *
+ * @internal
+ */
static afs_int32
FSYNC_com_VolOff(FSSYNC_VolOp_command * vcom, SYNC_response * res)
{
FSSYNC_VolOp_info info;
afs_int32 code = SYNC_OK;
int i;
- Volume * vp, * nvp;
+ Volume * vp;
Error error;
+#ifdef AFS_DEMAND_ATTACH_FS
+ int reserved = 0;
+ Volume *nvp;
+#endif
if (SYNC_verifyProtocolString(vcom->vop->partName, sizeof(vcom->vop->partName))) {
res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
#endif
if (vp) {
- if ((vcom->vop->partName[0] != 0) &&
- (strncmp(vcom->vop->partName, vp->partition->name,
- sizeof(vcom->vop->partName)) != 0)) {
+ if (!FSYNC_partMatch(vcom, vp, 1)) {
/* volume on desired partition is not online, so we
* should treat this as an offline volume.
*/
*/
switch (type) {
case salvageServer:
+ /* it is possible for the salvageserver to checkout a
+ * volume for salvage before its scheduling request
+ * has been sent to the salvageserver */
+ if (vp->salvage.requested && !vp->salvage.scheduled) {
+ vp->salvage.scheduled = 1;
+ }
case debugUtility:
- /* give the salvageserver lots of liberty */
break;
+
case volumeUtility:
- if ((V_attachState(vp) == VOL_STATE_ERROR) ||
- (V_attachState(vp) == VOL_STATE_SALVAGING)) {
+ if (VIsErrorState(V_attachState(vp))) {
goto deny;
}
+ if (vp->salvage.requested) {
+ goto deny;
+ }
break;
+
default:
Log("bad program type passed to FSSYNC\n");
goto deny;
* will evaluate the vol op metadata to determine whether
* attaching the volume would be safe */
VRegisterVolOp_r(vp, &info);
+ vp->pending_vol_op->vol_op_state = FSSYNC_VolOpRunningUnknown;
goto done;
default:
break;
/* convert to heavyweight ref */
nvp = VGetVolumeByVp_r(&error, vp);
- /* register the volume operation metadata with the volume */
- VRegisterVolOp_r(vp, &info);
-
if (!nvp) {
Log("FSYNC_com_VolOff: failed to get heavyweight reference to volume %u\n",
vcom->vop->volume);
res->hdr.reason = FSYNC_VOL_PKG_ERROR;
goto deny;
+ } else if (nvp != vp) {
+ /* i don't think this should ever happen, but just in case... */
+ Log("FSYNC_com_VolOff: warning: potentially dangerous race detected\n");
+ vp = nvp;
}
- vp = nvp;
+
+ /* register the volume operation metadata with the volume */
+ VRegisterVolOp_r(vp, &info);
+
}
#endif /* AFS_DEMAND_ATTACH_FS */
vcom->hdr->reason == V_DUMP ? "dump" :
"UNKNOWN");
}
+#ifdef AFS_DEMAND_ATTACH_FS
+ vp->pending_vol_op->vol_op_state = FSSYNC_VolOpRunningOnline;
+#endif
VPutVolume_r(vp);
} else {
if (VVolOpSetVBusy_r(vp, &info)) {
strlcpy(vcom->v->partName, vp->partition->name, sizeof(vcom->v->partName));
}
+#ifdef AFS_DEMAND_ATTACH_FS
+ VOfflineForVolOp_r(&error, vp, "A volume utility is running.");
+ if (error==0) {
+ assert(vp->nUsers==0);
+ vp->pending_vol_op->vol_op_state = FSSYNC_VolOpRunningOffline;
+ }
+ else {
+ VDeregisterVolOp_r(vp);
+ code = SYNC_DENIED;
+ }
+#else
VOffline_r(vp, "A volume utility is running.");
+#endif
vp = NULL;
}
}
return SYNC_DENIED;
}
+/**
+ * service an FSYNC request to mark a volume as moved.
+ *
+ * @param[in] vcom pointer command object
+ * @param[out] res object in which to store response packet
+ *
+ * @return operation status
+ * @retval SYNC_OK volume marked as moved to a remote server
+ * @retval SYNC_FAILED invalid command protocol message
+ * @retval SYNC_DENIED current volume state does not permit this operation
+ *
+ * @note this is an FSYNC RPC server stub
+ *
+ * @note this operation also breaks all callbacks for the given volume
+ *
+ * @note this procedure handles the following FSSYNC command codes:
+ * - FSYNC_VOL_MOVE
+ *
+ * @note the supplementary reason code contains additional details. For
+ * instance, SYNC_OK is still returned when the partition specified
+ * does not match the one registered in the volume object -- reason
+ * will be FSYNC_WRONG_PART in this case.
+ *
+ * @internal
+ */
static afs_int32
FSYNC_com_VolMove(FSSYNC_VolOp_command * vcom, SYNC_response * res)
{
+ afs_int32 code = SYNC_DENIED;
Error error;
Volume * vp;
+ if (SYNC_verifyProtocolString(vcom->vop->partName, sizeof(vcom->vop->partName))) {
+ res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
+ code = SYNC_FAILED;
+ goto done;
+ }
+
/* Yuch: the "reason" for the move is the site it got moved to... */
/* still set specialStatus so we stop sending back VBUSY.
* also should still break callbacks. Note that I don't know
vp = VGetVolume_r(&error, vcom->vop->volume);
#endif
if (vp) {
- vp->specialStatus = VMOVED;
+ if (FSYNC_partMatch(vcom, vp, 1)) {
+#ifdef AFS_DEMAND_ATTACH_FS
+ if ((V_attachState(vp) == VOL_STATE_UNATTACHED) ||
+ (V_attachState(vp) == VOL_STATE_PREATTACHED)) {
+#endif
+ code = SYNC_OK;
+ vp->specialStatus = VMOVED;
+#ifdef AFS_DEMAND_ATTACH_FS
+ } else {
+ res->hdr.reason = FSYNC_BAD_STATE;
+ }
+#endif
+ } else {
+ res->hdr.reason = FSYNC_WRONG_PART;
+ }
#ifndef AFS_DEMAND_ATTACH_FS
VPutVolume_r(vp);
-#endif
+#endif /* !AFS_DEMAND_ATTACH_FS */
+ } else {
+ res->hdr.reason = FSYNC_UNKNOWN_VOLID;
}
- if (V_BreakVolumeCallbacks) {
+ if ((code == SYNC_OK) && (V_BreakVolumeCallbacks != NULL)) {
Log("fssync: volume %u moved to %x; breaking all call backs\n",
vcom->vop->volume, vcom->hdr->reason);
VOL_UNLOCK;
VOL_LOCK;
}
- return SYNC_OK;
+
+ done:
+ return code;
}
+/**
+ * service an FSYNC request to mark a volume as destroyed.
+ *
+ * @param[in] vcom pointer command object
+ * @param[out] res object in which to store response packet
+ *
+ * @return operation status
+ * @retval SYNC_OK volume marked as destroyed
+ * @retval SYNC_FAILED invalid command protocol message
+ * @retval SYNC_DENIED current volume state does not permit this operation
+ *
+ * @note this is an FSYNC RPC server stub
+ *
+ * @note this procedure handles the following FSSYNC command codes:
+ * - FSYNC_VOL_DONE
+ *
+ * @note the supplementary reason code contains additional details. For
+ * instance, SYNC_OK is still returned when the partition specified
+ * does not match the one registered in the volume object -- reason
+ * will be FSYNC_WRONG_PART in this case.
+ *
+ * @internal
+ */
static afs_int32
FSYNC_com_VolDone(FSSYNC_VolOp_command * vcom, SYNC_response * res)
{
+ afs_int32 code = SYNC_FAILED;
#ifdef AFS_DEMAND_ATTACH_FS
Error error;
Volume * vp;
#endif
+ if (SYNC_verifyProtocolString(vcom->vop->partName, sizeof(vcom->vop->partName))) {
+ res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
+ goto done;
+ }
+
/* don't try to put online, this call is made only after deleting
* a volume, in which case we want to remove the vol # from the
* OfflineVolumes array only */
#ifdef AFS_DEMAND_ATTACH_FS
vp = VLookupVolume_r(&error, vcom->vop->volume, NULL);
if (vp) {
- VChangeState_r(vp, VOL_STATE_UNATTACHED);
- VDeregisterVolOp_r(vp);
+ if (FSYNC_partMatch(vcom, vp, 1)) {
+ if ((V_attachState(vp) == VOL_STATE_UNATTACHED) ||
+ (V_attachState(vp) == VOL_STATE_PREATTACHED)) {
+ VChangeState_r(vp, VOL_STATE_UNATTACHED);
+ VDeregisterVolOp_r(vp);
+ code = SYNC_OK;
+ } else {
+ code = SYNC_DENIED;
+ res->hdr.reason = FSYNC_BAD_STATE;
+ }
+ } else {
+ code = SYNC_OK; /* XXX is this really a good idea? */
+ res->hdr.reason = FSYNC_WRONG_PART;
+ }
+ } else {
+ res->hdr.reason = FSYNC_UNKNOWN_VOLID;
}
#endif
- return SYNC_OK;
+ done:
+ return code;
}
#ifdef AFS_DEMAND_ATTACH_FS
/**
- * force a volume into the hard error state.
+ * service an FSYNC request to transition a volume to the hard error state.
+ *
+ * @param[in] vcom pointer command object
+ * @param[out] res object in which to store response packet
+ *
+ * @return operation status
+ * @retval SYNC_OK volume transitioned to hard error state
+ * @retval SYNC_FAILED invalid command protocol message
+ * @retval SYNC_DENIED (see note)
+ *
+ * @note this is an FSYNC RPC server stub
+ *
+ * @note this procedure handles the following FSSYNC command codes:
+ * - FSYNC_VOL_FORCE_ERROR
+ *
+ * @note SYNC_DENIED is returned in the following cases:
+ * - no partition name is specified (reason field set to
+ * FSYNC_WRONG_PART).
+ * - volume id not known to fileserver (reason field set
+ * to FSYNC_UNKNOWN_VOLID).
+ *
+ * @note demand attach fileserver only
+ *
+ * @internal
*/
static afs_int32
FSYNC_com_VolError(FSSYNC_VolOp_command * vcom, SYNC_response * res)
{
Error error;
Volume * vp;
- afs_int32 code = SYNC_DENIED;
+ afs_int32 code = SYNC_FAILED;
+
+ if (SYNC_verifyProtocolString(vcom->vop->partName, sizeof(vcom->vop->partName))) {
+ res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
+ goto done;
+ }
vp = VLookupVolume_r(&error, vcom->vop->volume, NULL);
- if (vp && !strcmp(VPartitionPath(V_partition(vp)), vcom->vop->partName)) {
- memset(&vp->salvage, 0, sizeof(vp->salvage));
- VChangeState_r(vp, VOL_STATE_ERROR);
- code = SYNC_OK;
+ if (vp) {
+ if (FSYNC_partMatch(vcom, vp, 0)) {
+ /* null out salvsync control state, as it's no longer relevant */
+ memset(&vp->salvage, 0, sizeof(vp->salvage));
+ VChangeState_r(vp, VOL_STATE_ERROR);
+ code = SYNC_OK;
+ } else {
+ res->hdr.reason = FSYNC_WRONG_PART;
+ }
} else {
res->hdr.reason = FSYNC_UNKNOWN_VOLID;
}
-
+
+ done:
return code;
}
-#endif
+#endif /* AFS_DEMAND_ATTACH_FS */
+/**
+ * service an FSYNC request to break all callbacks for this volume.
+ *
+ * @param[in] vcom pointer command object
+ * @param[out] res object in which to store response packet
+ *
+ * @return operation status
+ * @retval SYNC_OK callback breaks scheduled for volume
+ *
+ * @note this is an FSYNC RPC server stub
+ *
+ * @note this procedure handles the following FSSYNC command codes:
+ * - FSYNC_VOL_BREAKCBKS
+ *
+ * @note demand attach fileserver only
+ *
+ * @todo should do partition matching
+ *
+ * @internal
+ */
static afs_int32
FSYNC_com_VolBreakCBKs(FSSYNC_VolOp_command * vcom, SYNC_response * res)
{
return SYNC_OK;
}
+/**
+ * service an FSYNC request to return the Volume object.
+ *
+ * @param[in] vcom pointer command object
+ * @param[out] res object in which to store response packet
+ *
+ * @return operation status
+ * @retval SYNC_OK volume object returned to caller
+ * @retval SYNC_FAILED bad command packet, or failed to locate volume object
+ *
+ * @note this is an FSYNC RPC server stub
+ *
+ * @note this procedure handles the following FSSYNC command codes:
+ * - FSYNC_VOL_QUERY
+ *
+ * @internal
+ */
static afs_int32
FSYNC_com_VolQuery(FSSYNC_VolOp_command * vcom, SYNC_response * res)
{
- afs_int32 code = SYNC_OK;
+ afs_int32 code = SYNC_FAILED;
Error error;
Volume * vp;
+ if (SYNC_verifyProtocolString(vcom->vop->partName, sizeof(vcom->vop->partName))) {
+ res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
+ goto done;
+ }
+
#ifdef AFS_DEMAND_ATTACH_FS
vp = VLookupVolume_r(&error, vcom->vop->volume, NULL);
#else /* !AFS_DEMAND_ATTACH_FS */
#endif /* !AFS_DEMAND_ATTACH_FS */
if (vp) {
- assert(sizeof(Volume) <= res->payload.len);
- memcpy(res->payload.buf, vp, sizeof(Volume));
- res->hdr.response_len += sizeof(Volume);
+ if (FSYNC_partMatch(vcom, vp, 1)) {
+ if (res->payload.len >= sizeof(Volume)) {
+ memcpy(res->payload.buf, vp, sizeof(Volume));
+ res->hdr.response_len += sizeof(Volume);
+ code = SYNC_OK;
+ } else {
+ res->hdr.reason = SYNC_REASON_PAYLOAD_TOO_BIG;
+ }
+ } else {
+ res->hdr.reason = FSYNC_WRONG_PART;
+ }
#ifndef AFS_DEMAND_ATTACH_FS
VPutVolume_r(vp);
#endif
} else {
res->hdr.reason = FSYNC_UNKNOWN_VOLID;
- code = SYNC_FAILED;
}
+
+ done:
return code;
}
+/**
+ * service an FSYNC request to return the Volume header.
+ *
+ * @param[in] vcom pointer command object
+ * @param[out] res object in which to store response packet
+ *
+ * @return operation status
+ * @retval SYNC_OK volume header returned to caller
+ * @retval SYNC_FAILED bad command packet, or failed to locate volume header
+ *
+ * @note this is an FSYNC RPC server stub
+ *
+ * @note this procedure handles the following FSSYNC command codes:
+ * - FSYNC_VOL_QUERY_HDR
+ *
+ * @internal
+ */
static afs_int32
FSYNC_com_VolHdrQuery(FSSYNC_VolOp_command * vcom, SYNC_response * res)
{
- afs_int32 code = SYNC_OK;
+ afs_int32 code = SYNC_FAILED;
Error error;
Volume * vp;
- int hdr_ok = 0;
+
+ if (SYNC_verifyProtocolString(vcom->vop->partName, sizeof(vcom->vop->partName))) {
+ res->hdr.reason = SYNC_REASON_MALFORMED_PACKET;
+ goto done;
+ }
+ if (res->payload.len < sizeof(VolumeDiskData)) {
+ res->hdr.reason = SYNC_REASON_PAYLOAD_TOO_BIG;
+ goto done;
+ }
#ifdef AFS_DEMAND_ATTACH_FS
vp = VLookupVolume_r(&error, vcom->vop->volume, NULL);
- if (vp &&
- (vp->header != NULL) &&
- (V_attachFlags(vp) & VOL_HDR_ATTACHED) &&
- (V_attachFlags(vp) & VOL_HDR_LOADED)) {
- hdr_ok = 1;
- }
#else /* !AFS_DEMAND_ATTACH_FS */
vp = VGetVolume_r(&error, vcom->vop->volume);
- if (vp && vp->header) {
- hdr_ok = 1;
- }
-#endif /* !AFS_DEMAND_ATTACH_FS */
-
- load_done:
- if (hdr_ok) {
- assert(sizeof(VolumeDiskData) <= res->payload.len);
- memcpy(res->payload.buf, &V_disk(vp), sizeof(VolumeDiskData));
- res->hdr.response_len += sizeof(VolumeDiskData);
-#ifndef AFS_DEMAND_ATTACH_FS
- VPutVolume_r(vp);
#endif
- } else {
- if (vp) {
- res->hdr.reason = FSYNC_HDR_NOT_ATTACHED;
+
+ if (vp) {
+ if (FSYNC_partMatch(vcom, vp, 1)) {
+#ifdef AFS_DEMAND_ATTACH_FS
+ if ((vp->header == NULL) ||
+ !(V_attachFlags(vp) & VOL_HDR_ATTACHED) ||
+ !(V_attachFlags(vp) & VOL_HDR_LOADED)) {
+ res->hdr.reason = FSYNC_HDR_NOT_ATTACHED;
+ goto cleanup;
+ }
+#else /* !AFS_DEMAND_ATTACH_FS */
+ if (!vp || !vp->header) {
+ res->hdr.reason = FSYNC_HDR_NOT_ATTACHED;
+ goto cleanup;
+ }
+#endif /* !AFS_DEMAND_ATTACH_FS */
} else {
- res->hdr.reason = FSYNC_UNKNOWN_VOLID;
+ res->hdr.reason = FSYNC_WRONG_PART;
+ goto cleanup;
}
- code = SYNC_FAILED;
+ } else {
+ res->hdr.reason = FSYNC_UNKNOWN_VOLID;
+ goto done;
}
+
+ memcpy(res->payload.buf, &V_disk(vp), sizeof(VolumeDiskData));
+ res->hdr.response_len += sizeof(VolumeDiskData);
+ code = SYNC_OK;
+
+ cleanup:
+#ifndef AFS_DEMAND_ATTACH_FS
+ VPutVolume_r(vp);
+#endif
+
+ done:
return code;
}
#endif /* AFS_DEMAND_ATTACH_FS */
static afs_int32
-FSYNC_com_VnQry(int fd, SYNC_command * com, SYNC_response * res)
+FSYNC_com_VnQry(osi_socket fd, SYNC_command * com, SYNC_response * res)
{
afs_int32 code = SYNC_OK;
FSSYNC_VnQry_hdr * qry = com->payload.buf;
}
static afs_int32
-FSYNC_com_StatsOp(int fd, SYNC_command * com, SYNC_response * res)
+FSYNC_com_StatsOp(osi_socket fd, SYNC_command * com, SYNC_response * res)
{
afs_int32 code = SYNC_OK;
FSSYNC_StatsOp_command scom;
}
#endif /* AFS_DEMAND_ATTACH_FS */
+/**
+ * populate an FSSYNC_VolOp_info object from a command packet object.
+ *
+ * @param[in] vcom pointer to command packet
+ * @param[out] info pointer to info object which will be populated
+ *
+ * @note FSSYNC_VolOp_info objects are attached to Volume objects when
+ * a volume operation is commenced.
+ *
+ * @internal
+ */
static void
FSYNC_com_to_info(FSSYNC_VolOp_command * vcom, FSSYNC_VolOp_info * info)
{
memcpy(&info->com, vcom->hdr, sizeof(SYNC_command_hdr));
memcpy(&info->vop, vcom->vop, sizeof(FSSYNC_VolOp_hdr));
+ info->vol_op_state = FSSYNC_VolOpPending;
}
+/**
+ * check whether command packet partition name matches volume
+ * object's partition name.
+ *
+ * @param[in] vcom pointer to command packet
+ * @param[in] vp pointer to volume object
+ * @param[in] match_anon anon matching control flag (see note below)
+ *
+ * @return whether partitions match
+ * @retval 0 partitions do NOT match
+ * @retval 1 partitions match
+ *
+ * @note if match_anon is non-zero, then this function will return a
+ * positive match for a zero-length partition string in the
+ * command packet.
+ *
+ * @internal
+ */
+static int
+FSYNC_partMatch(FSSYNC_VolOp_command * vcom, Volume * vp, int match_anon)
+{
+ return ((match_anon && vcom->vop->partName[0] == 0) ||
+ (strncmp(vcom->vop->partName, V_partition(vp)->name,
+ sizeof(vcom->vop->partName)) == 0));
+}
+
+
static void
-FSYNC_Drop(int fd)
+FSYNC_Drop(osi_socket fd)
{
struct offlineInfo *p;
int i;
Volume *vp;
tvolName[0] = '/';
- sprintf(&tvolName[1], VFORMAT, p[i].volumeID);
+ sprintf(&tvolName[1], VFORMAT, afs_printable_uint32_lu(p[i].volumeID));
vp = VAttachVolumeByName_r(&error, p[i].partName, tvolName,
V_VOLUPD);
if (vp)
static int AcceptHandler = -1; /* handler id for accept, if turned on */
static void
-AcceptOn()
+AcceptOn(void)
{
if (AcceptHandler == -1) {
assert(AddHandler(fssync_server_state.fd, FSYNC_newconnection));
}
static void
-AcceptOff()
+AcceptOff(void)
{
if (AcceptHandler != -1) {
assert(RemoveHandler(fssync_server_state.fd));
/* The multiple FD handling code. */
-static int HandlerFD[MAXHANDLERS];
-static int (*HandlerProc[MAXHANDLERS]) ();
+static osi_socket HandlerFD[MAXHANDLERS];
+static void (*HandlerProc[MAXHANDLERS]) (osi_socket);
static void
-InitHandler()
+InitHandler(void)
{
register int i;
ObtainWriteLock(&FSYNC_handler_lock);
#endif
static int
-AddHandler(int afd, int (*aproc) ())
+AddHandler(osi_socket afd, void (*aproc) (osi_socket))
{
register int i;
ObtainWriteLock(&FSYNC_handler_lock);
}
static int
-FindHandler(register int afd)
+FindHandler(register osi_socket afd)
{
register int i;
ObtainReadLock(&FSYNC_handler_lock);
}
static int
-FindHandler_r(register int afd)
+FindHandler_r(register osi_socket afd)
{
register int i;
for (i = 0; i < MAXHANDLERS; i++)
}
static int
-RemoveHandler(register int afd)
+RemoveHandler(register osi_socket afd)
{
ObtainWriteLock(&FSYNC_handler_lock);
HandlerFD[FindHandler_r(afd)] = -1;
for (i = 0; i < MAXHANDLERS; i++)
if (HandlerFD[i] != -1) {
FD_SET(HandlerFD[i], fdsetp);
- if (maxfd < HandlerFD[i])
+#ifndef AFS_NT40_ENV
+ /* On Windows the nfds parameter to select() is ignored */
+ if (maxfd < HandlerFD[i] || maxfd == (int)-1)
maxfd = HandlerFD[i];
+#endif /* AFS_NT40_ENV */
}
*maxfdp = maxfd;
ReleaseReadLock(&FSYNC_handler_lock); /* just in case */
git://git.openafs.org / openafs.git / blobdiff