cm_scache_t *scp = vscp;
afs_int32 nbytes;
afs_int32 save_nbytes;
+ cm_scache_t save_scache;
long temp;
AFSFetchStatus outStatus;
AFSStoreStatus inStatus;
require_64bit_ops = 1;
}
+ /* now we're ready to do the store operation */
+ retry_rpc:
InterlockedIncrement(&scp->activeRPCs);
lock_ReleaseWrite(&scp->rw);
- /* now we're ready to do the store operation */
save_nbytes = nbytes;
+ save_scache = *scp;
+
do {
code = cm_ConnFromFID(&scp->fid, userp, reqp, &connp);
if (code)
_InterlockedOr(&scp->flags, CM_SCACHEFLAG_OVERQUOTA);
}
+ if ( cm_verifyData )
+ {
+ if (!cm_VerifyStoreData(&biod, &save_scache)) {
+ /* file server content doesn't match what we sent. */
+ nbytes = save_nbytes;
+ goto retry_rpc;
+ }
+ }
+
cm_ReleaseBIOD(&biod, 1, code, 1);
exit_storedata_excl:
/* clear things out */
biop->scp = scp; /* do not hold; held by caller */
biop->userp = userp; /* do not hold; held by caller */
+ biop->reqp = reqp;
biop->offset = *inOffsetp;
biop->length = 0;
biop->bufListp = NULL;
/* put this element in the list */
qdp = osi_QDAlloc();
osi_SetQData(qdp, bufp);
+
+ if ( cm_verifyData )
+ buf_ComputeCheckSum(bufp);
+
/* don't have to hold bufp, since held by buf_Find above */
osi_QAddH((osi_queue_t **) &biop->bufListp,
(osi_queue_t **) &biop->bufListEndp,
*/
qdp = osi_QDAlloc();
osi_SetQData(qdp, bufp);
+
+ if ( cm_verifyData )
+ buf_ComputeCheckSum(bufp);
+
/* no buf_hold necessary, since we have it held from buf_Find */
osi_QAddT((osi_queue_t **) &biop->bufListp,
(osi_queue_t **) &biop->bufListEndp,
*/
qdp = osi_QDAlloc();
osi_SetQData(qdp, bufp);
+
+ if ( cm_verifyData )
+ buf_ComputeCheckSum(bufp);
+
/* no buf_hold necessary, since we have it held from buf_Find */
osi_QAddH((osi_queue_t **) &biop->bufListp,
(osi_queue_t **) &biop->bufListEndp,
return code;
}
+
+/*
+ * cm_VerifyStoreData. Function passed a rw locked cm_scache_t and a store data biod.
+ *
+ * Return 1 if the data verifies; 0 if not.
+ */
+
+long
+cm_VerifyStoreData(cm_bulkIO_t *biod, cm_scache_t *savedScp)
+{
+ long code=0, code1=0;
+ afs_uint32 nbytes; /* bytes in transfer */
+ afs_uint32 nbytes_hi = 0; /* high-order 32 bits of bytes in transfer */
+ afs_uint64 length_found = 0;
+ long rbytes; /* bytes in rx_Read call */
+ long temp;
+ AFSFetchStatus afsStatus;
+ AFSCallBack callback;
+ AFSVolSync volSync;
+ AFSFid tfid;
+ struct rx_call *rxcallp;
+ struct rx_connection *rxconnp;
+ cm_conn_t *connp;
+ int require_64bit_ops = 0;
+ int call_was_64bit = 0;
+ int fs_fetchdata_offset_bug = 0;
+ int first_read = 1;
+ int scp_locked = 1;
+ char * bufferp = malloc(biod->length);
+ long verified = 0;
+ cm_scache_t *scp = biod->scp;
+ cm_user_t *userp = biod->userp;
+ cm_req_t *reqp = biod->reqp;
+ afs_uint64 dataVersion = scp->dataVersion;
+
+ memset(&volSync, 0, sizeof(volSync));
+ memset(bufferp, 0, biod->length);
+
+ cm_AFSFidFromFid(&tfid, &scp->fid);
+
+ if (LargeIntegerGreaterThan(LargeIntegerAdd(biod->offset,
+ ConvertLongToLargeInteger(biod->length)),
+ ConvertLongToLargeInteger(LONG_MAX))) {
+ require_64bit_ops = 1;
+ }
+
+ InterlockedIncrement(&scp->activeRPCs);
+ osi_Log2(afsd_logp, "cm_VerifyStoreData: fetching data scp %p DV 0x%x", scp, scp->dataVersion);
+
+ if (scp_locked) {
+ lock_ReleaseWrite(&scp->rw);
+ scp_locked = 0;
+ }
+
+ /* now make the call */
+ do {
+ code = cm_ConnFromFID(&scp->fid, userp, reqp, &connp);
+ if (code)
+ continue;
+
+ rxconnp = cm_GetRxConn(connp);
+ rxcallp = rx_NewCall(rxconnp);
+ rx_PutConnection(rxconnp);
+
+ nbytes = nbytes_hi = 0;
+
+ if (SERVERHAS64BIT(connp)) {
+ call_was_64bit = 1;
+
+ osi_Log4(afsd_logp, "CALL FetchData64 scp 0x%p, off 0x%x:%08x, size 0x%x",
+ scp, biod->offset.HighPart, biod->offset.LowPart, biod->length);
+
+ code = StartRXAFS_FetchData64(rxcallp, &tfid, biod->offset.QuadPart, biod->length);
+
+ if (code == 0) {
+ temp = rx_Read32(rxcallp, &nbytes_hi);
+ if (temp == sizeof(afs_int32)) {
+ nbytes_hi = ntohl(nbytes_hi);
+ } else {
+ nbytes_hi = 0;
+ code = rx_Error(rxcallp);
+ code1 = rx_EndCall(rxcallp, code);
+ rxcallp = NULL;
+ }
+ }
+ } else {
+ call_was_64bit = 0;
+ }
+
+ if (code == RXGEN_OPCODE || !SERVERHAS64BIT(connp)) {
+ if (require_64bit_ops) {
+ osi_Log0(afsd_logp, "Skipping FetchData. Operation requires FetchData64");
+ code = CM_ERROR_TOOBIG;
+ } else {
+ if (!rxcallp) {
+ rxconnp = cm_GetRxConn(connp);
+ rxcallp = rx_NewCall(rxconnp);
+ rx_PutConnection(rxconnp);
+ }
+
+ osi_Log3(afsd_logp, "CALL FetchData scp 0x%p, off 0x%x, size 0x%x",
+ scp, biod->offset.LowPart, biod->length);
+
+ code = StartRXAFS_FetchData(rxcallp, &tfid, biod->offset.LowPart, biod->length);
+
+ SET_SERVERHASNO64BIT(connp);
+ }
+ }
+
+ if (code == 0) {
+ temp = rx_Read32(rxcallp, &nbytes);
+ if (temp == sizeof(afs_int32)) {
+ nbytes = ntohl(nbytes);
+ FillInt64(length_found, nbytes_hi, nbytes);
+ if (length_found > biod->length) {
+ /*
+ * prior to 1.4.12 and 1.5.65 the file server would return
+ * (filesize - offset) if the requested offset was greater than
+ * the filesize. The correct return value would have been zero.
+ * Force a retry by returning an RX_PROTOCOL_ERROR. If the cause
+ * is a race between two RPCs issues by this cache manager, the
+ * correct thing will happen the second time.
+ */
+ osi_Log0(afsd_logp, "cm_GetData length_found > biod.length");
+ fs_fetchdata_offset_bug = 1;
+ }
+ } else {
+ osi_Log1(afsd_logp, "cm_GetData rx_Read32 returns %d != 4", temp);
+ code = (rx_Error(rxcallp) < 0) ? rx_Error(rxcallp) : RX_PROTOCOL_ERROR;
+ }
+ }
+ /* for the moment, nbytes_hi will always be 0 if code == 0
+ because data_length is a 32-bit quantity. */
+
+ if (code == 0) {
+ /* fill length_found of data from the pipe into the pages.
+ * When we stop, qdp will point at the last page we're
+ * dealing with, and bufferp will tell us where we
+ * stopped. We'll need this info below when we clear
+ * the remainder of the last page out (and potentially
+ * clear later pages out, if we fetch past EOF).
+ */
+ while (length_found > 0) {
+ /* assert that there are still more buffers;
+ * our check above for length_found being less than
+ * data_length should ensure this.
+ */
+ osi_assertx(bufferp != NULL, "null cm_buf_t");
+
+ /* read rbytes of data */
+ rbytes = (afs_uint32)(length_found > biod->length ? biod->length : length_found);
+ temp = rx_Read(rxcallp, bufferp, rbytes);
+ if (temp < rbytes) {
+ /*
+ * If the file server returned (filesize - offset),
+ * then the first rx_Read will return zero octets of data.
+ * If it does, do not treat it as an error. Correct the
+ * length_found and continue as if the file server said
+ * it was sending us zero octets of data.
+ */
+ if (fs_fetchdata_offset_bug && first_read)
+ length_found = 0;
+ else
+ code = (rx_Error(rxcallp) < 0) ? rx_Error(rxcallp) : RX_PROTOCOL_ERROR;
+ break;
+ }
+ first_read = 0;
+
+ /* and adjust counters */
+ length_found -= temp;
+ }
+ }
+
+ if (code == 0) {
+ if (call_was_64bit)
+ code = EndRXAFS_FetchData64(rxcallp, &afsStatus, &callback, &volSync);
+ else
+ code = EndRXAFS_FetchData(rxcallp, &afsStatus, &callback, &volSync);
+ } else {
+ if (call_was_64bit)
+ osi_Log1(afsd_logp, "CALL EndRXAFS_FetchData64 skipped due to error %d", code);
+ else
+ osi_Log1(afsd_logp, "CALL EndRXAFS_FetchData skipped due to error %d", code);
+ }
+
+ if (rxcallp)
+ code1 = rx_EndCall(rxcallp, code);
+
+ if (code1 == RXKADUNKNOWNKEY)
+ osi_Log0(afsd_logp, "CALL EndCall returns RXKADUNKNOWNKEY");
+
+ /* If we are avoiding a file server bug, ignore the error state */
+ if (fs_fetchdata_offset_bug && first_read && length_found == 0 && code == -451) {
+ /* Clone the current status info and clear the error state */
+ scp_locked = cm_CloneStatus(scp, userp, scp_locked, &afsStatus, &volSync);
+ if (scp_locked) {
+ lock_ReleaseWrite(&scp->rw);
+ scp_locked = 0;
+ }
+ code = 0;
+ /* Prefer the error value from FetchData over rx_EndCall */
+ } else if (code == 0 && code1 != 0)
+ code = code1;
+ osi_Log0(afsd_logp, "CALL FetchData DONE");
+
+ } while (cm_Analyze(connp, userp, reqp, &scp->fid, 0, &volSync, NULL, NULL, code));
+
+ fetchingcompleted:
+ code = cm_MapRPCError(code, reqp);
+
+ if (!scp_locked)
+ lock_ObtainWrite(&scp->rw);
+
+ if (code == 0)
+ cm_MergeStatus(NULL, scp, &afsStatus, &volSync, userp, reqp, CM_MERGEFLAG_FETCHDATA);
+ else
+ InterlockedDecrement(&scp->activeRPCs);
+
+ if (code == 0)
+ {
+ if (dataVersion == scp->dataVersion)
+ {
+ osi_queueData_t *qdp = NULL;
+ cm_buf_t *bufp;
+ afs_uint32 buf_offset;
+ afs_uint32 bytes_compared = 0;
+ afs_uint32 cmp_length;
+ int md5_match = 1;
+
+ verified = 1;
+
+ while ( bytes_compared < biod->length )
+ {
+ if (qdp == NULL) {
+ qdp = biod->bufListEndp;
+ buf_offset = biod->offset.LowPart % cm_data.buf_blockSize;
+ } else {
+ qdp = (osi_queueData_t *) osi_QPrev(&qdp->q);
+ buf_offset = 0;
+ }
+ cmp_length = cm_data.buf_blockSize - buf_offset;
+
+ osi_assertx(qdp != NULL, "null osi_queueData_t");
+ bufp = osi_GetQData(qdp);
+
+ if (memcmp(bufferp+bytes_compared, bufp->datap+buf_offset, cmp_length) != 0)
+ {
+ verified = 0;
+ md5_match = buf_ValidateCheckSum(bufp);
+
+ osi_Log5(afsd_logp, "cm_VerifyDataStore verification failed scp 0x%p bufp 0x%p offset 0x%x:%08x md5 %s",
+ scp, bufp, bufp->offset.HighPart, bufp->offset.LowPart, md5_match ? "match" : "no-match");
+ }
+ bytes_compared += cmp_length;
+ }
+ } else {
+ osi_Log4(afsd_logp, "cm_VerifyStoreData unable to verify due to data version change scp 0x%p, off 0x%x:%08x, size 0x%x",
+ scp, biod->offset.HighPart, biod->offset.LowPart, biod->length);
+ }
+ }
+
+ if (bufferp)
+ free(bufferp);
+
+ return verified;
+}
return error;
}
+static afs_int32
+SetDataVerifyCmd(struct cmd_syndesc *as, void *arock)
+{
+ afs_int32 code = 0, flag;
+ struct ViceIoctl blob;
+ char *tp;
+
+#ifdef WIN32
+ if ( !fs_IsAdmin() ) {
+ fprintf (stderr,"Permission denied: requires AFS Client Administrator access.\n");
+ return EACCES;
+ }
+#endif /* WIN32 */
+
+ tp = as->parms[0].items->data;
+ if (strcmp(tp, "on") == 0)
+ flag = 1;
+ else if (strcmp(tp, "off") == 0)
+ flag = 0;
+ else {
+ fprintf (stderr, "%s: %s must be \"on\" or \"off\".\n", pn, tp);
+ return EINVAL;
+ }
+
+ blob.in = (char *) &flag;
+ blob.in_size = sizeof(flag);
+ blob.out_size = 0;
+ code = pioctl_utf8(0, VIOC_SETVERIFYDATA, &blob, 1);
+ if (code)
+ fs_Die(code, NULL);
+ return 0;
+}
+
+static afs_int32
+GetDataVerifyCmd(struct cmd_syndesc *as, void *arock)
+{
+ afs_int32 code = 0, flag;
+ struct ViceIoctl blob;
+ char *tp;
+ errno_t err;
+
+ blob.in = NULL;
+ blob.in_size = 0;
+ blob.out_size = sizeof(flag);
+ blob.out = space;
+
+ code = pioctl_utf8(0, VIOC_GETVERIFYDATA, &blob, 1);
+
+ if (code || blob.out_size != sizeof(flag))
+ fs_Die(code, NULL);
+ else {
+ tp = space;
+#if _MSC_VER < 1400
+ memcpy(&flag, tp, sizeof(afs_int32));
+#else
+ err = memcpy_s(&flag, sizeof(flag), tp, sizeof(afs_int32));
+ if ( err ) {
+ fprintf (stderr, "memcpy_s failure on flag");
+ exit(1);
+ }
+#endif
+
+ printf("Data verify mode is currently ");
+ if (flag == 1)
+ printf("on.\n");
+ else
+ printf("off.\n");
+ }
+ return 0;
+}
+
#ifndef WIN32
#include "AFS_component_version_number.c"
#endif
cmd_AddParm(ts, "-path", CMD_LIST, CMD_OPTIONAL, "dir/file path");
cmd_AddParm(ts, "-literal", CMD_FLAG, CMD_OPTIONAL, "literal evaluation of mountpoints and symlinks");
+ ts = cmd_CreateSyntax("setverify", SetDataVerifyCmd, NULL, "set cache manager data verify mode");
+ cmd_AddParm(ts, "-verify", CMD_SINGLE, 0, "on or off");
+
+ ts = cmd_CreateSyntax("getverify", GetDataVerifyCmd, NULL, "get cache manager data verify mode");
+
code = cmd_Dispatch(argc, argv);
if (rxInitDone)
git://git.openafs.org / openafs.git / commitdiff