#include <afs/param.h>
#include <afs/stds.h>
-#ifndef DJGPP
#include <windows.h>
#include <winsock2.h>
#include <nb30.h>
-#endif /* !DJGPP */
#include <malloc.h>
#include <string.h>
#include <stdlib.h>
#include <osi.h>
#include "afsd.h"
+#include "cm_btree.h"
/*extern void afsi_log(char *pattern, ...);*/
extern osi_hyper_t hzero;
-/* hash table stuff */
-cm_scache_t **cm_hashTablep;
-long cm_hashTableSize;
-long cm_maxSCaches;
-long cm_currentSCaches;
-
-/* LRU stuff */
-cm_scache_t *cm_scacheLRUFirstp;
-cm_scache_t *cm_scacheLRULastp;
-
/* File locks */
osi_queue_t *cm_allFileLocks;
+osi_queue_t *cm_freeFileLocks;
+unsigned long cm_lockRefreshCycle;
/* lock for globals */
osi_rwlock_t cm_scacheLock;
/* Dummy scache entry for use with pioctl fids */
cm_scache_t cm_fakeSCache;
+osi_queue_t * cm_allFreeWaiters; /* protected by cm_scacheLock */
+
#ifdef AFS_FREELANCE_CLIENT
extern osi_mutex_t cm_Freelance_Lock;
#endif
/* must be called with cm_scacheLock write-locked! */
-void cm_AdjustLRU(cm_scache_t *scp)
+void cm_AdjustScacheLRU(cm_scache_t *scp)
{
- if (scp == cm_scacheLRULastp)
- cm_scacheLRULastp = (cm_scache_t *) osi_QPrev(&scp->q);
- osi_QRemove((osi_queue_t **) &cm_scacheLRUFirstp, &scp->q);
- osi_QAdd((osi_queue_t **) &cm_scacheLRUFirstp, &scp->q);
- if (!cm_scacheLRULastp) cm_scacheLRULastp = scp;
+ if (scp == cm_data.scacheLRULastp)
+ cm_data.scacheLRULastp = (cm_scache_t *) osi_QPrev(&scp->q);
+ osi_QRemoveHT((osi_queue_t **) &cm_data.scacheLRUFirstp, (osi_queue_t **) &cm_data.scacheLRULastp, &scp->q);
+ osi_QAdd((osi_queue_t **) &cm_data.scacheLRUFirstp, &scp->q);
+ if (!cm_data.scacheLRULastp)
+ cm_data.scacheLRULastp = scp;
}
+/* call with scache write-locked and mutex held */
+void cm_RemoveSCacheFromHashTable(cm_scache_t *scp)
+{
+ cm_scache_t **lscpp;
+ cm_scache_t *tscp;
+ int i;
+
+ if (scp->flags & CM_SCACHEFLAG_INHASH) {
+ /* hash it out first */
+ i = CM_SCACHE_HASH(&scp->fid);
+ for (lscpp = &cm_data.scacheHashTablep[i], tscp = cm_data.scacheHashTablep[i];
+ tscp;
+ lscpp = &tscp->nextp, tscp = tscp->nextp) {
+ if (tscp == scp) {
+ *lscpp = scp->nextp;
+ scp->flags &= ~CM_SCACHEFLAG_INHASH;
+ break;
+ }
+ }
+ }
+}
+
+/* called with cm_scacheLock write-locked; recycles an existing scp.
+ *
+ * this function ignores all of the locking hierarchy.
+ */
+long cm_RecycleSCache(cm_scache_t *scp, afs_int32 flags)
+{
+ if (scp->refCount != 0) {
+ return -1;
+ }
+
+ if (scp->flags & CM_SCACHEFLAG_SMB_FID) {
+ osi_Log1(afsd_logp,"cm_RecycleSCache CM_SCACHEFLAG_SMB_FID detected scp 0x%p", scp);
+#ifdef DEBUG
+ osi_panic("cm_RecycleSCache CM_SCACHEFLAG_SMB_FID detected",__FILE__,__LINE__);
+#endif
+ return -1;
+ }
+
+ cm_RemoveSCacheFromHashTable(scp);
+
+#if 0
+ if (flags & CM_SCACHE_RECYCLEFLAG_DESTROY_BUFFERS) {
+ osi_queueData_t *qdp;
+ cm_buf_t *bufp;
+
+ while(qdp = scp->bufWritesp) {
+ bufp = osi_GetQData(qdp);
+ osi_QRemove((osi_queue_t **) &scp->bufWritesp, &qdp->q);
+ osi_QDFree(qdp);
+ if (bufp) {
+ lock_ObtainMutex(&bufp->mx);
+ bufp->cmFlags &= ~CM_BUF_CMSTORING;
+ bufp->flags &= ~CM_BUF_DIRTY;
+ bufp->dirty_offset = 0;
+ bufp->dirty_length = 0;
+ bufp->flags |= CM_BUF_ERROR;
+ bufp->error = VNOVNODE;
+ bufp->dataVersion = -1; /* bad */
+ bufp->dirtyCounter++;
+ if (bufp->flags & CM_BUF_WAITING) {
+ osi_Log2(afsd_logp, "CM RecycleSCache Waking [scp 0x%x] bufp 0x%x", scp, bufp);
+ osi_Wakeup((long) &bufp);
+ }
+ lock_ReleaseMutex(&bufp->mx);
+ buf_Release(bufp);
+ }
+ }
+ while(qdp = scp->bufReadsp) {
+ bufp = osi_GetQData(qdp);
+ osi_QRemove((osi_queue_t **) &scp->bufReadsp, &qdp->q);
+ osi_QDFree(qdp);
+ if (bufp) {
+ lock_ObtainMutex(&bufp->mx);
+ bufp->cmFlags &= ~CM_BUF_CMFETCHING;
+ bufp->flags &= ~CM_BUF_DIRTY;
+ bufp->dirty_offset = 0;
+ bufp->dirty_length = 0;
+ bufp->flags |= CM_BUF_ERROR;
+ bufp->error = VNOVNODE;
+ bufp->dataVersion = -1; /* bad */
+ bufp->dirtyCounter++;
+ if (bufp->flags & CM_BUF_WAITING) {
+ osi_Log2(afsd_logp, "CM RecycleSCache Waking [scp 0x%x] bufp 0x%x", scp, bufp);
+ osi_Wakeup((long) &bufp);
+ }
+ lock_ReleaseMutex(&bufp->mx);
+ buf_Release(bufp);
+ }
+ }
+ buf_CleanDirtyBuffers(scp);
+ } else {
+ /* look for things that shouldn't still be set */
+ osi_assertx(scp->bufWritesp == NULL, "non-null cm_scache_t bufWritesp");
+ osi_assertx(scp->bufReadsp == NULL, "non-null cm_scache_t bufReadsp");
+ }
+#endif
+
+ /* invalidate so next merge works fine;
+ * also initialize some flags */
+ scp->fileType = 0;
+ scp->flags &= ~(CM_SCACHEFLAG_STATD
+ | CM_SCACHEFLAG_DELETED
+ | CM_SCACHEFLAG_RO
+ | CM_SCACHEFLAG_PURERO
+ | CM_SCACHEFLAG_OVERQUOTA
+ | CM_SCACHEFLAG_OUTOFSPACE
+ | CM_SCACHEFLAG_EACCESS);
+ scp->serverModTime = 0;
+ scp->dataVersion = 0;
+ scp->bufDataVersionLow = 0;
+ scp->bulkStatProgress = hzero;
+ scp->waitCount = 0;
+ scp->waitQueueT = NULL;
+
+ if (scp->cbServerp) {
+ cm_PutServer(scp->cbServerp);
+ scp->cbServerp = NULL;
+ }
+ scp->cbExpires = 0;
+
+ scp->fid.vnode = 0;
+ scp->fid.volume = 0;
+ scp->fid.unique = 0;
+ scp->fid.cell = 0;
+ scp->fid.hash = 0;
+
+ /* remove from dnlc */
+ cm_dnlcPurgedp(scp);
+ cm_dnlcPurgevp(scp);
+
+ /* discard cached status; if non-zero, Close
+ * tried to store this to server but failed */
+ scp->mask = 0;
+
+ /* drop held volume ref */
+ if (scp->volp) {
+ cm_PutVolume(scp->volp);
+ scp->volp = NULL;
+ }
+
+ /* discard symlink info */
+ scp->mountPointStringp[0] = '\0';
+ memset(&scp->mountRootFid, 0, sizeof(cm_fid_t));
+ memset(&scp->dotdotFid, 0, sizeof(cm_fid_t));
+
+ /* reset locking info */
+ scp->fileLocksH = NULL;
+ scp->fileLocksT = NULL;
+ scp->serverLock = (-1);
+ scp->exclusiveLocks = 0;
+ scp->sharedLocks = 0;
+ scp->lockDataVersion = -1;
+
+ /* not locked, but there can be no references to this guy
+ * while we hold the global refcount lock.
+ */
+ cm_FreeAllACLEnts(scp);
+
+#ifdef USE_BPLUS
+ /* destroy directory Bplus Tree */
+ if (scp->dirBplus) {
+ LARGE_INTEGER start, end;
+ QueryPerformanceCounter(&start);
+ bplus_free_tree++;
+ freeBtree(scp->dirBplus);
+ scp->dirBplus = NULL;
+ QueryPerformanceCounter(&end);
+
+ bplus_free_time += (end.QuadPart - start.QuadPart);
+ }
+#endif
+ return 0;
+}
+
+
/* called with cm_scacheLock write-locked; find a vnode to recycle.
- * Can allocate a new one if desperate, or if below quota (cm_maxSCaches).
+ * Can allocate a new one if desperate, or if below quota (cm_data.maxSCaches).
*/
cm_scache_t *cm_GetNewSCache(void)
{
- cm_scache_t *scp;
- int i;
- cm_scache_t **lscpp;
- cm_scache_t *tscp;
-
- if (cm_currentSCaches >= cm_maxSCaches) {
- for (scp = cm_scacheLRULastp;
- scp;
- scp = (cm_scache_t *) osi_QPrev(&scp->q)) {
- if (scp->refCount == 0) break;
- }
-
- if (scp) {
- /* we found an entry, so return it */
- if (scp->flags & CM_SCACHEFLAG_INHASH) {
- /* hash it out first */
- i = CM_SCACHE_HASH(&scp->fid);
- lscpp = &cm_hashTablep[i];
- for (tscp = *lscpp;
- tscp;
- lscpp = &tscp->nextp, tscp = *lscpp) {
- if (tscp == scp) break;
- }
- osi_assertx(tscp, "afsd: scache hash screwup");
- *lscpp = scp->nextp;
- scp->flags &= ~CM_SCACHEFLAG_INHASH;
- }
-
- /* look for things that shouldn't still be set */
- osi_assert(scp->bufWritesp == NULL);
- osi_assert(scp->bufReadsp == NULL);
-
- /* invalidate so next merge works fine;
- * also initialize some flags */
- scp->flags &= ~(CM_SCACHEFLAG_STATD
- | CM_SCACHEFLAG_RO
- | CM_SCACHEFLAG_PURERO
- | CM_SCACHEFLAG_OVERQUOTA
- | CM_SCACHEFLAG_OUTOFSPACE);
- scp->serverModTime = 0;
- scp->dataVersion = 0;
- scp->bulkStatProgress = hzero;
-
- /* discard callback */
- scp->cbServerp = NULL;
- scp->cbExpires = 0;
-
- /* remove from dnlc */
- cm_dnlcPurgedp(scp);
- cm_dnlcPurgevp(scp);
-
- /* discard cached status; if non-zero, Close
- * tried to store this to server but failed */
- scp->mask = 0;
-
- /* drop held volume ref */
- if (scp->volp) {
- cm_PutVolume(scp->volp);
- scp->volp = NULL;
- }
-
- /* discard symlink info */
- if (scp->mountPointStringp) {
- free(scp->mountPointStringp);
- scp->mountPointStringp = NULL;
- }
- if (scp->mountRootFidp) {
- free(scp->mountRootFidp);
- scp->mountRootFidp = NULL;
- }
- if (scp->dotdotFidp) {
- free(scp->dotdotFidp);
- scp->dotdotFidp = NULL;
- }
-
- /* not locked, but there can be no references to this guy
- * while we hold the global refcount lock.
- */
- cm_FreeAllACLEnts(scp);
-
+ cm_scache_t *scp;
+ int retry = 0;
+
+#if 0
+ /* first pass - look for deleted objects */
+ for ( scp = cm_data.scacheLRULastp;
+ scp;
+ scp = (cm_scache_t *) osi_QPrev(&scp->q))
+ {
+ osi_assertx(scp >= cm_data.scacheBaseAddress && scp < (cm_scache_t *)cm_data.scacheHashTablep,
+ "invalid cm_scache_t address");
+
+ if (scp->refCount == 0) {
+ if (scp->flags & CM_SCACHEFLAG_DELETED) {
+ osi_Log1(afsd_logp, "GetNewSCache attempting to recycle deleted scp 0x%x", scp);
+ if (!cm_RecycleSCache(scp, CM_SCACHE_RECYCLEFLAG_DESTROY_BUFFERS)) {
+
+ /* we found an entry, so return it */
+ /* now remove from the LRU queue and put it back at the
+ * head of the LRU queue.
+ */
+ cm_AdjustScacheLRU(scp);
+
+ /* and we're done */
+ return scp;
+ }
+ osi_Log1(afsd_logp, "GetNewSCache recycled failed scp 0x%x", scp);
+ } else if (!(scp->flags & CM_SCACHEFLAG_INHASH)) {
+ /* we found an entry, so return it */
+ /* now remove from the LRU queue and put it back at the
+ * head of the LRU queue.
+ */
+ cm_AdjustScacheLRU(scp);
+
+ /* and we're done */
+ return scp;
+ }
+ }
+ }
+ osi_Log0(afsd_logp, "GetNewSCache no deleted or recycled entries available for reuse");
+#endif
+
+ if (cm_data.currentSCaches >= cm_data.maxSCaches) {
+ /* There were no deleted scache objects that we could use. Try to find
+ * one that simply hasn't been used in a while.
+ */
+ for ( scp = cm_data.scacheLRULastp;
+ scp;
+ scp = (cm_scache_t *) osi_QPrev(&scp->q))
+ {
+ /* It is possible for the refCount to be zero and for there still
+ * to be outstanding dirty buffers. If there are dirty buffers,
+ * we must not recycle the scp. */
+ if (scp->refCount == 0 && scp->bufReadsp == NULL && scp->bufWritesp == NULL) {
+ if (!buf_DirtyBuffersExist(&scp->fid)) {
+ if (!cm_RecycleSCache(scp, 0)) {
+ /* we found an entry, so return it */
/* now remove from the LRU queue and put it back at the
* head of the LRU queue.
*/
- cm_AdjustLRU(scp);
-
+ cm_AdjustScacheLRU(scp);
+
/* and we're done */
return scp;
+ }
+ } else {
+ osi_Log1(afsd_logp,"GetNewSCache dirty buffers exist scp 0x%x", scp);
}
- }
+ }
+ }
+ osi_Log1(afsd_logp, "GetNewSCache all scache entries in use (retry = %d)", retry);
+
+ return NULL;
+ }
- /* if we get here, we should allocate a new scache entry. We either are below
- * quota or we have a leak and need to allocate a new one to avoid panicing.
- */
- scp = malloc(sizeof(*scp));
- memset(scp, 0, sizeof(*scp));
- lock_InitializeMutex(&scp->mx, "cm_scache_t mutex");
- lock_InitializeRWLock(&scp->bufCreateLock, "cm_scache_t bufCreateLock");
-
- /* and put it in the LRU queue */
- osi_QAdd((osi_queue_t **) &cm_scacheLRUFirstp, &scp->q);
- if (!cm_scacheLRULastp) cm_scacheLRULastp = scp;
- cm_currentSCaches++;
- cm_dnlcPurgedp(scp); /* make doubly sure that this is not in dnlc */
- cm_dnlcPurgevp(scp);
- return scp;
+ /* if we get here, we should allocate a new scache entry. We either are below
+ * quota or we have a leak and need to allocate a new one to avoid panicing.
+ */
+ scp = cm_data.scacheBaseAddress + cm_data.currentSCaches;
+ osi_assertx(scp >= cm_data.scacheBaseAddress && scp < (cm_scache_t *)cm_data.scacheHashTablep,
+ "invalid cm_scache_t address");
+ memset(scp, 0, sizeof(cm_scache_t));
+ scp->magic = CM_SCACHE_MAGIC;
+ lock_InitializeRWLock(&scp->rw, "cm_scache_t rw");
+ lock_InitializeRWLock(&scp->bufCreateLock, "cm_scache_t bufCreateLock");
+#ifdef USE_BPLUS
+ lock_InitializeRWLock(&scp->dirlock, "cm_scache_t dirlock");
+#endif
+ scp->serverLock = -1;
+
+ /* and put it in the LRU queue */
+ osi_QAdd((osi_queue_t **) &cm_data.scacheLRUFirstp, &scp->q);
+ if (!cm_data.scacheLRULastp)
+ cm_data.scacheLRULastp = scp;
+ cm_data.currentSCaches++;
+ cm_dnlcPurgedp(scp); /* make doubly sure that this is not in dnlc */
+ cm_dnlcPurgevp(scp);
+ scp->allNextp = cm_data.allSCachesp;
+ cm_data.allSCachesp = scp;
+ return scp;
+}
+
+void cm_SetFid(cm_fid_t *fidp, afs_uint32 cell, afs_uint32 volume, afs_uint32 vnode, afs_uint32 unique)
+{
+ fidp->cell = cell;
+ fidp->volume = volume;
+ fidp->vnode = vnode;
+ fidp->unique = unique;
+ fidp->hash = ((cell & 0xF) << 28) | ((volume & 0x3F) << 22) | ((vnode & 0x7FF) << 11) | (unique & 0x7FF);
}
/* like strcmp, only for fids */
-int cm_FidCmp(cm_fid_t *ap, cm_fid_t *bp)
+__inline int cm_FidCmp(cm_fid_t *ap, cm_fid_t *bp)
{
- if (ap->vnode != bp->vnode) return 1;
- if (ap->volume != bp->volume) return 1;
- if (ap->unique != bp->unique) return 1;
- if (ap->cell != bp->cell) return 1;
- return 0;
+ if (ap->hash != bp->hash)
+ return 1;
+ if (ap->vnode != bp->vnode)
+ return 1;
+ if (ap->volume != bp->volume)
+ return 1;
+ if (ap->unique != bp->unique)
+ return 1;
+ if (ap->cell != bp->cell)
+ return 1;
+ return 0;
}
-void cm_fakeSCacheInit()
+void cm_fakeSCacheInit(int newFile)
{
- memset(&cm_fakeSCache, 0, sizeof(cm_fakeSCache));
- lock_InitializeMutex(&cm_fakeSCache.mx, "cm_scache_t mutex");
- cm_fakeSCache.cbServerp = (struct cm_server *)(-1);
- /* can leave clientModTime at 0 */
- cm_fakeSCache.fileType = CM_SCACHETYPE_FILE;
- cm_fakeSCache.unixModeBits = 0777;
- cm_fakeSCache.length.LowPart = 1000;
- cm_fakeSCache.linkCount = 1;
+ if ( newFile ) {
+ memset(&cm_data.fakeSCache, 0, sizeof(cm_scache_t));
+ cm_data.fakeSCache.cbServerp = (struct cm_server *)(-1);
+ /* can leave clientModTime at 0 */
+ cm_data.fakeSCache.fileType = CM_SCACHETYPE_FILE;
+ cm_data.fakeSCache.unixModeBits = 0777;
+ cm_data.fakeSCache.length.LowPart = 1000;
+ cm_data.fakeSCache.linkCount = 1;
+ cm_data.fakeSCache.refCount = 1;
+ }
+ lock_InitializeRWLock(&cm_data.fakeSCache.rw, "cm_scache_t rw");
}
-void cm_InitSCache(long maxSCaches)
+long
+cm_ValidateSCache(void)
{
- static osi_once_t once;
+ cm_scache_t * scp, *lscp;
+ long i;
+
+ if ( cm_data.scacheLRUFirstp == NULL && cm_data.scacheLRULastp != NULL ||
+ cm_data.scacheLRUFirstp != NULL && cm_data.scacheLRULastp == NULL) {
+ afsi_log("cm_ValidateSCache failure: inconsistent LRU pointers");
+ fprintf(stderr, "cm_ValidateSCache failure: inconsistent LRU pointers\n");
+ return -17;
+ }
+
+ for ( scp = cm_data.scacheLRUFirstp, lscp = NULL, i = 0;
+ scp;
+ lscp = scp, scp = (cm_scache_t *) osi_QNext(&scp->q), i++ ) {
+ if (scp->magic != CM_SCACHE_MAGIC) {
+ afsi_log("cm_ValidateSCache failure: scp->magic != CM_SCACHE_MAGIC");
+ fprintf(stderr, "cm_ValidateSCache failure: scp->magic != CM_SCACHE_MAGIC\n");
+ return -1;
+ }
+ if (scp->nextp && scp->nextp->magic != CM_SCACHE_MAGIC) {
+ afsi_log("cm_ValidateSCache failure: scp->nextp->magic != CM_SCACHE_MAGIC");
+ fprintf(stderr, "cm_ValidateSCache failure: scp->nextp->magic != CM_SCACHE_MAGIC\n");
+ return -2;
+ }
+ if (scp->randomACLp && scp->randomACLp->magic != CM_ACLENT_MAGIC) {
+ afsi_log("cm_ValidateSCache failure: scp->randomACLp->magic != CM_ACLENT_MAGIC");
+ fprintf(stderr, "cm_ValidateSCache failure: scp->randomACLp->magic != CM_ACLENT_MAGIC\n");
+ return -3;
+ }
+ if (scp->volp && scp->volp->magic != CM_VOLUME_MAGIC) {
+ afsi_log("cm_ValidateSCache failure: scp->volp->magic != CM_VOLUME_MAGIC");
+ fprintf(stderr, "cm_ValidateSCache failure: scp->volp->magic != CM_VOLUME_MAGIC\n");
+ return -4;
+ }
+ if (i > cm_data.currentSCaches ) {
+ afsi_log("cm_ValidateSCache failure: LRU First queue loops");
+ fprintf(stderr, "cm_ValidateSCache failure: LUR First queue loops\n");
+ return -13;
+ }
+ if (lscp != (cm_scache_t *) osi_QPrev(&scp->q)) {
+ afsi_log("cm_ValidateSCache failure: QPrev(scp) != previous");
+ fprintf(stderr, "cm_ValidateSCache failure: QPrev(scp) != previous\n");
+ return -15;
+ }
+ }
+
+ for ( scp = cm_data.scacheLRULastp, lscp = NULL, i = 0; scp;
+ lscp = scp, scp = (cm_scache_t *) osi_QPrev(&scp->q), i++ ) {
+ if (scp->magic != CM_SCACHE_MAGIC) {
+ afsi_log("cm_ValidateSCache failure: scp->magic != CM_SCACHE_MAGIC");
+ fprintf(stderr, "cm_ValidateSCache failure: scp->magic != CM_SCACHE_MAGIC\n");
+ return -5;
+ }
+ if (scp->nextp && scp->nextp->magic != CM_SCACHE_MAGIC) {
+ afsi_log("cm_ValidateSCache failure: scp->nextp->magic != CM_SCACHE_MAGIC");
+ fprintf(stderr, "cm_ValidateSCache failure: scp->nextp->magic != CM_SCACHE_MAGIC\n");
+ return -6;
+ }
+ if (scp->randomACLp && scp->randomACLp->magic != CM_ACLENT_MAGIC) {
+ afsi_log("cm_ValidateSCache failure: scp->randomACLp->magic != CM_ACLENT_MAGIC");
+ fprintf(stderr, "cm_ValidateSCache failure: scp->randomACLp->magic != CM_ACLENT_MAGIC\n");
+ return -7;
+ }
+ if (scp->volp && scp->volp->magic != CM_VOLUME_MAGIC) {
+ afsi_log("cm_ValidateSCache failure: scp->volp->magic != CM_VOLUME_MAGIC");
+ fprintf(stderr, "cm_ValidateSCache failure: scp->volp->magic != CM_VOLUME_MAGIC\n");
+ return -8;
+ }
+ if (i > cm_data.currentSCaches ) {
+ afsi_log("cm_ValidateSCache failure: LRU Last queue loops");
+ fprintf(stderr, "cm_ValidateSCache failure: LUR Last queue loops\n");
+ return -14;
+ }
+ if (lscp != (cm_scache_t *) osi_QNext(&scp->q)) {
+ afsi_log("cm_ValidateSCache failure: QNext(scp) != next");
+ fprintf(stderr, "cm_ValidateSCache failure: QNext(scp) != next\n");
+ return -16;
+ }
+ }
+
+ for ( i=0; i < cm_data.scacheHashTableSize; i++ ) {
+ for ( scp = cm_data.scacheHashTablep[i]; scp; scp = scp->nextp ) {
+ afs_uint32 hash;
+ hash = CM_SCACHE_HASH(&scp->fid);
+ if (scp->magic != CM_SCACHE_MAGIC) {
+ afsi_log("cm_ValidateSCache failure: scp->magic != CM_SCACHE_MAGIC");
+ fprintf(stderr, "cm_ValidateSCache failure: scp->magic != CM_SCACHE_MAGIC\n");
+ return -9;
+ }
+ if (scp->nextp && scp->nextp->magic != CM_SCACHE_MAGIC) {
+ afsi_log("cm_ValidateSCache failure: scp->nextp->magic != CM_SCACHE_MAGIC");
+ fprintf(stderr, "cm_ValidateSCache failure: scp->nextp->magic != CM_SCACHE_MAGIC\n");
+ return -10;
+ }
+ if (scp->randomACLp && scp->randomACLp->magic != CM_ACLENT_MAGIC) {
+ afsi_log("cm_ValidateSCache failure: scp->randomACLp->magic != CM_ACLENT_MAGIC");
+ fprintf(stderr, "cm_ValidateSCache failure: scp->randomACLp->magic != CM_ACLENT_MAGIC\n");
+ return -11;
+ }
+ if (scp->volp && scp->volp->magic != CM_VOLUME_MAGIC) {
+ afsi_log("cm_ValidateSCache failure: scp->volp->magic != CM_VOLUME_MAGIC");
+ fprintf(stderr, "cm_ValidateSCache failure: scp->volp->magic != CM_VOLUME_MAGIC\n");
+ return -12;
+ }
+ if (hash != i) {
+ afsi_log("cm_ValidateSCache failure: scp hash != hash index");
+ fprintf(stderr, "cm_ValidateSCache failure: scp hash != hash index\n");
+ return -13;
+ }
+ }
+ }
+
+ return cm_dnlcValidate();
+}
+
+void
+cm_SuspendSCache(void)
+{
+ cm_scache_t * scp;
+ time_t now;
+
+ cm_GiveUpAllCallbacksAllServers(TRUE);
+
+ /*
+ * After this call all servers are marked down.
+ * Do not clear the callbacks, instead change the
+ * expiration time so that the callbacks will be expired
+ * when the servers are marked back up. However, we
+ * want the callbacks to be preserved as long as the
+ * servers are down. That way if the machine resumes
+ * without network, the stat cache item will still be
+ * considered valid.
+ */
+ now = time(NULL);
+
+ lock_ObtainWrite(&cm_scacheLock);
+ for ( scp = cm_data.allSCachesp; scp; scp = scp->allNextp ) {
+ if (scp->cbServerp) {
+ if (scp->flags & CM_SCACHEFLAG_PURERO && scp->volp) {
+ if (scp->volp->cbExpiresRO == scp->cbExpires) {
+ scp->volp->cbExpiresRO = now+1;
+ }
+ }
+ scp->cbExpires = now+1;
+ }
+ }
+ lock_ReleaseWrite(&cm_scacheLock);
+}
+
+long
+cm_ShutdownSCache(void)
+{
+ cm_scache_t * scp;
+
+ lock_ObtainWrite(&cm_scacheLock);
+
+ for ( scp = cm_data.allSCachesp; scp;
+ scp = scp->allNextp ) {
+ if (scp->randomACLp) {
+ lock_ObtainWrite(&scp->rw);
+ cm_FreeAllACLEnts(scp);
+ lock_ReleaseWrite(&scp->rw);
+ }
+
+ if (scp->cbServerp) {
+ cm_PutServer(scp->cbServerp);
+ scp->cbServerp = NULL;
+ }
+ scp->cbExpires = 0;
+ scp->flags &= ~CM_SCACHEFLAG_CALLBACK;
+
+#ifdef USE_BPLUS
+ if (scp->dirBplus)
+ freeBtree(scp->dirBplus);
+ scp->dirBplus = NULL;
+ scp->dirDataVersion = -1;
+ lock_FinalizeRWLock(&scp->dirlock);
+#endif
+ lock_FinalizeRWLock(&scp->rw);
+ lock_FinalizeRWLock(&scp->bufCreateLock);
+ }
+ lock_ReleaseWrite(&cm_scacheLock);
+
+ cm_GiveUpAllCallbacksAllServers(FALSE);
+
+ return cm_dnlcShutdown();
+}
+
+void cm_InitSCache(int newFile, long maxSCaches)
+{
+ static osi_once_t once;
- if (osi_Once(&once)) {
- lock_InitializeRWLock(&cm_scacheLock, "cm_scacheLock");
- cm_hashTableSize = maxSCaches / 2;
- cm_hashTablep = malloc(sizeof(cm_scache_t *) * cm_hashTableSize);
- memset(cm_hashTablep, 0, sizeof(cm_scache_t *) * cm_hashTableSize);
- cm_allFileLocks = NULL;
- cm_currentSCaches = 0;
- cm_maxSCaches = maxSCaches;
- cm_fakeSCacheInit();
- cm_dnlcInit();
- osi_EndOnce(&once);
+ if (osi_Once(&once)) {
+ lock_InitializeRWLock(&cm_scacheLock, "cm_scacheLock");
+ if ( newFile ) {
+ memset(cm_data.scacheHashTablep, 0, sizeof(cm_scache_t *) * cm_data.scacheHashTableSize);
+ cm_data.allSCachesp = NULL;
+ cm_data.currentSCaches = 0;
+ cm_data.maxSCaches = maxSCaches;
+ cm_data.scacheLRUFirstp = cm_data.scacheLRULastp = NULL;
+ } else {
+ cm_scache_t * scp;
+
+ for ( scp = cm_data.allSCachesp; scp;
+ scp = scp->allNextp ) {
+ lock_InitializeRWLock(&scp->rw, "cm_scache_t rw");
+ lock_InitializeRWLock(&scp->bufCreateLock, "cm_scache_t bufCreateLock");
+#ifdef USE_BPLUS
+ lock_InitializeRWLock(&scp->dirlock, "cm_scache_t dirlock");
+#endif
+ scp->cbServerp = NULL;
+ scp->cbExpires = 0;
+ scp->fileLocksH = NULL;
+ scp->fileLocksT = NULL;
+ scp->serverLock = (-1);
+ scp->lastRefreshCycle = 0;
+ scp->exclusiveLocks = 0;
+ scp->sharedLocks = 0;
+ scp->openReads = 0;
+ scp->openWrites = 0;
+ scp->openShares = 0;
+ scp->openExcls = 0;
+ scp->waitCount = 0;
+#ifdef USE_BPLUS
+ scp->dirBplus = NULL;
+ scp->dirDataVersion = -1;
+#endif
+ scp->waitQueueT = NULL;
+ scp->flags &= ~CM_SCACHEFLAG_WAITING;
+ }
}
+ cm_allFileLocks = NULL;
+ cm_freeFileLocks = NULL;
+ cm_lockRefreshCycle = 0;
+ cm_fakeSCacheInit(newFile);
+ cm_allFreeWaiters = NULL;
+ cm_dnlcInit(newFile);
+ osi_EndOnce(&once);
+ }
}
/* version that doesn't bother creating the entry if we don't find it */
cm_scache_t *cm_FindSCache(cm_fid_t *fidp)
{
- long hash;
- cm_scache_t *scp;
-
- hash = CM_SCACHE_HASH(fidp);
-
- osi_assert(fidp->cell != 0);
+ long hash;
+ cm_scache_t *scp;
- lock_ObtainWrite(&cm_scacheLock);
- for(scp=cm_hashTablep[hash]; scp; scp=scp->nextp) {
- if (cm_FidCmp(fidp, &scp->fid) == 0) {
- scp->refCount++;
- cm_AdjustLRU(scp);
- lock_ReleaseWrite(&cm_scacheLock);
- return scp;
- }
+ hash = CM_SCACHE_HASH(fidp);
+
+ if (fidp->cell == 0) {
+ return NULL;
+ }
+
+ lock_ObtainWrite(&cm_scacheLock);
+ for (scp=cm_data.scacheHashTablep[hash]; scp; scp=scp->nextp) {
+ if (cm_FidCmp(fidp, &scp->fid) == 0) {
+ cm_HoldSCacheNoLock(scp);
+ cm_AdjustScacheLRU(scp);
+ lock_ReleaseWrite(&cm_scacheLock);
+ return scp;
}
- lock_ReleaseWrite(&cm_scacheLock);
- return NULL;
+ }
+ lock_ReleaseWrite(&cm_scacheLock);
+ return NULL;
}
+#ifdef DEBUG_REFCOUNT
+long cm_GetSCacheDbg(cm_fid_t *fidp, cm_scache_t **outScpp, cm_user_t *userp,
+ cm_req_t *reqp, char * file, long line)
+#else
long cm_GetSCache(cm_fid_t *fidp, cm_scache_t **outScpp, cm_user_t *userp,
- cm_req_t *reqp)
+ cm_req_t *reqp)
+#endif
{
- long hash;
+ long hash;
cm_scache_t *scp;
long code;
- cm_volume_t *volp;
+ cm_volume_t *volp = NULL;
cm_cell_t *cellp;
- char* mp;
- int special; // yj: boolean variable to test if file is on root.afs
- int isRoot;
+ int special = 0; // yj: boolean variable to test if file is on root.afs
+ int isRoot = 0;
+ extern cm_fid_t cm_rootFid;
hash = CM_SCACHE_HASH(fidp);
- osi_assert(fidp->cell != 0);
+ osi_assertx(fidp->cell != 0, "unassigned cell value");
+
+ if (fidp->cell== cm_data.rootFid.cell &&
+ fidp->volume==cm_data.rootFid.volume &&
+ fidp->vnode==0x0 && fidp->unique==0x0)
+ {
+ osi_Log0(afsd_logp,"cm_GetSCache called with root cell/volume and vnode=0 and unique=0");
+ }
- // yj: check if we have the scp, if so, we don't need
- // to do anything else
+ // yj: check if we have the scp, if so, we don't need
+ // to do anything else
lock_ObtainWrite(&cm_scacheLock);
- for(scp=cm_hashTablep[hash]; scp; scp=scp->nextp) {
- if (cm_FidCmp(fidp, &scp->fid) == 0) {
- scp->refCount++;
+ for (scp=cm_data.scacheHashTablep[hash]; scp; scp=scp->nextp) {
+ if (cm_FidCmp(fidp, &scp->fid) == 0) {
+#ifdef DEBUG_REFCOUNT
+ afsi_log("%s:%d cm_GetSCache (1) outScpp 0x%p ref %d", file, line, scp, scp->refCount);
+ osi_Log1(afsd_logp,"cm_GetSCache (1) outScpp 0x%p", scp);
+#endif
+ cm_HoldSCacheNoLock(scp);
*outScpp = scp;
- cm_AdjustLRU(scp);
+ cm_AdjustScacheLRU(scp);
lock_ReleaseWrite(&cm_scacheLock);
- return 0;
+ return 0;
}
}
-
- // yj: when we get here, it means we don't have an scp
- // so we need to either load it or fake it, depending
- // on whether the file is "special", see below.
-
- // yj: if we're trying to get an scp for a file that's
- // on root.afs of homecell, we want to handle it specially
- // because we have to fill in the status stuff 'coz we
- // don't want trybulkstat to fill it in for us
+
+ // yj: when we get here, it means we don't have an scp
+ // so we need to either load it or fake it, depending
+ // on whether the file is "special", see below.
+
+ // yj: if we're trying to get an scp for a file that's
+ // on root.afs of homecell, we want to handle it specially
+ // because we have to fill in the status stuff 'coz we
+ // don't want trybulkstat to fill it in for us
#ifdef AFS_FREELANCE_CLIENT
- special = (fidp->cell==AFS_FAKE_ROOT_CELL_ID &&
+ special = (fidp->cell==AFS_FAKE_ROOT_CELL_ID &&
fidp->volume==AFS_FAKE_ROOT_VOL_ID &&
- !(fidp->vnode==0x1 && fidp->unique==0x1));
- isRoot = (fidp->cell==AFS_FAKE_ROOT_CELL_ID &&
+ !(fidp->vnode==0x1 && fidp->unique==0x1));
+ isRoot = (fidp->cell==AFS_FAKE_ROOT_CELL_ID &&
fidp->volume==AFS_FAKE_ROOT_VOL_ID &&
- fidp->vnode==0x1 && fidp->unique==0x1);
- if (cm_freelanceEnabled && isRoot) {
- osi_Log0(afsd_logp,"cm_getSCache Freelance and isRoot");
- /* freelance: if we are trying to get the root scp for the first
- time, we will just put in a place holder entry. */
- volp = NULL;
- }
+ fidp->vnode==0x1 && fidp->unique==0x1);
+ if (cm_freelanceEnabled && isRoot) {
+ osi_Log0(afsd_logp,"cm_GetSCache Freelance and isRoot");
+ /* freelance: if we are trying to get the root scp for the first
+ * time, we will just put in a place holder entry.
+ */
+ volp = NULL;
+ }
- if (cm_freelanceEnabled && special) {
- osi_Log0(afsd_logp,"cm_getSCache Freelance and special");
- lock_ObtainMutex(&cm_Freelance_Lock);
- mp =(cm_localMountPoints+fidp->vnode-2)->mountPointStringp;
- lock_ReleaseMutex(&cm_Freelance_Lock);
-
- scp = cm_GetNewSCache();
-
- scp->fid = *fidp;
- scp->volp = cm_rootSCachep->volp;
- if (scp->dotdotFidp == (cm_fid_t *) NULL)
- scp->dotdotFidp = (cm_fid_t *) malloc (sizeof(cm_fid_t));
- scp->dotdotFidp->cell=AFS_FAKE_ROOT_CELL_ID;
- scp->dotdotFidp->volume=AFS_FAKE_ROOT_VOL_ID;
- scp->dotdotFidp->unique=1;
- scp->dotdotFidp->vnode=1;
- scp->flags |= (CM_SCACHEFLAG_PURERO | CM_SCACHEFLAG_RO);
- scp->nextp=cm_hashTablep[hash];
- cm_hashTablep[hash]=scp;
- scp->flags |= CM_SCACHEFLAG_INHASH;
- scp->refCount = 1;
- scp->fileType = CM_SCACHETYPE_MOUNTPOINT;
-
- lock_ObtainMutex(&cm_Freelance_Lock);
- scp->length.LowPart = strlen(mp)+4;
- scp->mountPointStringp=malloc(strlen(mp)+1);
- strcpy(scp->mountPointStringp,mp);
- lock_ReleaseMutex(&cm_Freelance_Lock);
-
- scp->owner=0x0;
- scp->unixModeBits=0x1ff;
- scp->clientModTime=FakeFreelanceModTime;
- scp->serverModTime=FakeFreelanceModTime;
- scp->parentUnique = 0x1;
- scp->parentVnode=0x1;
- scp->group=0;
- scp->dataVersion=0x8;
- *outScpp = scp;
- lock_ReleaseWrite(&cm_scacheLock);
- /*afsi_log(" getscache done");*/
- return 0;
+ if (cm_freelanceEnabled && special) {
+ char mp[MOUNTPOINTLEN] = "";
+ afs_uint32 fileType;
+
+ osi_Log0(afsd_logp,"cm_GetSCache Freelance and special");
+ lock_ObtainMutex(&cm_Freelance_Lock);
+ if (fidp->vnode >= 2 && fidp->vnode - 2 < cm_noLocalMountPoints) {
+ strncpy(mp,(cm_localMountPoints+fidp->vnode-2)->mountPointStringp, MOUNTPOINTLEN);
+ mp[MOUNTPOINTLEN-1] = '\0';
+ if ( !strnicmp(mp, "msdfs:", strlen("msdfs:")) )
+ fileType = CM_SCACHETYPE_DFSLINK;
+ else
+ fileType = (cm_localMountPoints+fidp->vnode-2)->fileType;
+ } else {
+ fileType = CM_SCACHETYPE_INVALID;
+ }
+ lock_ReleaseMutex(&cm_Freelance_Lock);
+
+ scp = cm_GetNewSCache();
+ if (scp == NULL) {
+ osi_Log0(afsd_logp,"cm_GetSCache unable to obtain *new* scache entry");
+ lock_ReleaseWrite(&cm_scacheLock);
+ return CM_ERROR_WOULDBLOCK;
}
- // end of yj code
+
+#if not_too_dangerous
+ /* dropping the cm_scacheLock allows more than one thread
+ * to obtain the same cm_scache_t from the LRU list. Since
+ * the refCount is known to be zero at this point we have to
+ * assume that no one else is using the one this is returned.
+ */
+ lock_ReleaseWrite(&cm_scacheLock);
+ lock_ObtainWrite(&scp->rw);
+ lock_ObtainWrite(&cm_scacheLock);
+#endif
+ scp->fid = *fidp;
+ scp->volp = cm_data.rootSCachep->volp;
+ if (scp->volp)
+ cm_GetVolume(scp->volp); /* grab an additional reference */
+ scp->dotdotFid.cell=AFS_FAKE_ROOT_CELL_ID;
+ scp->dotdotFid.volume=AFS_FAKE_ROOT_VOL_ID;
+ scp->dotdotFid.unique=1;
+ scp->dotdotFid.vnode=1;
+ scp->flags |= (CM_SCACHEFLAG_PURERO | CM_SCACHEFLAG_RO);
+ scp->nextp=cm_data.scacheHashTablep[hash];
+ cm_data.scacheHashTablep[hash]=scp;
+ scp->flags |= CM_SCACHEFLAG_INHASH;
+ scp->refCount = 1;
+ osi_Log1(afsd_logp,"cm_GetSCache (freelance) sets refCount to 1 scp 0x%x", scp);
+ scp->fileType = fileType;
+ scp->length.LowPart = (DWORD)strlen(mp)+4;
+ scp->length.HighPart = 0;
+ strncpy(scp->mountPointStringp,mp,MOUNTPOINTLEN);
+ scp->owner=0x0;
+ scp->unixModeBits=0777;
+ scp->clientModTime=FakeFreelanceModTime;
+ scp->serverModTime=FakeFreelanceModTime;
+ scp->parentUnique = 0x1;
+ scp->parentVnode=0x1;
+ scp->group=0;
+ scp->dataVersion=cm_data.fakeDirVersion;
+ scp->bufDataVersionLow=cm_data.fakeDirVersion;
+ scp->lockDataVersion=-1; /* no lock yet */
+#if not_too_dangerous
+ lock_ReleaseWrite(&scp->rw);
+#endif
+ *outScpp = scp;
+ lock_ReleaseWrite(&cm_scacheLock);
+#ifdef DEBUG_REFCOUNT
+ afsi_log("%s:%d cm_GetSCache (2) outScpp 0x%p ref %d", file, line, scp, scp->refCount);
+ osi_Log1(afsd_logp,"cm_GetSCache (2) outScpp 0x%p", scp);
+#endif
+ return 0;
+ }
+ // end of yj code
#endif /* AFS_FREELANCE_CLIENT */
/* otherwise, we need to find the volume */
- if (!cm_freelanceEnabled || !isRoot) {
+ if (!cm_freelanceEnabled || !isRoot) {
lock_ReleaseWrite(&cm_scacheLock); /* for perf. reasons */
- cellp = cm_FindCellByID(fidp->cell);
+ cellp = cm_FindCellByID(fidp->cell, 0);
if (!cellp)
return CM_ERROR_NOSUCHCELL;
- code = cm_GetVolumeByID(cellp, fidp->volume, userp, reqp, &volp);
+ code = cm_GetVolumeByID(cellp, fidp->volume, userp, reqp, CM_GETVOL_FLAG_CREATE, &volp);
if (code)
return code;
lock_ObtainWrite(&cm_scacheLock);
- }
+ }
- /* otherwise, we have the volume, now reverify that the scp doesn't
- * exist, and proceed.
- */
- for(scp=cm_hashTablep[hash]; scp; scp=scp->nextp) {
- if (cm_FidCmp(fidp, &scp->fid) == 0) {
- scp->refCount++;
- cm_AdjustLRU(scp);
+ /* otherwise, we have the volume, now reverify that the scp doesn't
+ * exist, and proceed.
+ */
+ for (scp=cm_data.scacheHashTablep[hash]; scp; scp=scp->nextp) {
+ if (cm_FidCmp(fidp, &scp->fid) == 0) {
+#ifdef DEBUG_REFCOUNT
+ afsi_log("%s:%d cm_GetSCache (3) outScpp 0x%p ref %d", file, line, scp, scp->refCount);
+ osi_Log1(afsd_logp,"cm_GetSCache (3) outScpp 0x%p", scp);
+#endif
+ cm_HoldSCacheNoLock(scp);
+ osi_assertx(scp->volp == volp, "cm_scache_t volume has unexpected value");
+ cm_AdjustScacheLRU(scp);
lock_ReleaseWrite(&cm_scacheLock);
- cm_PutVolume(volp);
+ if (volp)
+ cm_PutVolume(volp);
*outScpp = scp;
- return 0;
+ return 0;
}
}
/* now, if we don't have the fid, recycle something */
- scp = cm_GetNewSCache();
- osi_assert(!(scp->flags & CM_SCACHEFLAG_INHASH));
- scp->fid = *fidp;
- scp->volp = volp; /* a held reference */
-
- if (!cm_freelanceEnabled || !isRoot) {
- /* if this scache entry represents a volume root then we need
- * to copy the dotdotFipd from the volume structure where the
- * "master" copy is stored (defect 11489)
- */
- if(scp->fid.vnode == 1 && scp->fid.unique == 1 && volp->dotdotFidp) {
- if (scp->dotdotFidp == (cm_fid_t *) NULL)
- scp->dotdotFidp = (cm_fid_t *) malloc(sizeof(cm_fid_t));
- *(scp->dotdotFidp) = *volp->dotdotFidp;
- }
+ scp = cm_GetNewSCache();
+ if (scp == NULL) {
+ osi_Log0(afsd_logp,"cm_GetNewSCache unable to obtain *new* scache entry");
+ lock_ReleaseWrite(&cm_scacheLock);
+ if (volp)
+ cm_PutVolume(volp);
+ return CM_ERROR_WOULDBLOCK;
+ }
+ osi_Log2(afsd_logp,"cm_GetNewSCache returns scp 0x%x flags 0x%x", scp, scp->flags);
+
+ osi_assertx(!(scp->flags & CM_SCACHEFLAG_INHASH), "CM_SCACHEFLAG_INHASH set");
+
+#if not_too_dangerous
+ /* dropping the cm_scacheLock allows more than one thread
+ * to obtain the same cm_scache_t from the LRU list. Since
+ * the refCount is known to be zero at this point we have to
+ * assume that no one else is using the one this is returned.
+ */
+ lock_ReleaseWrite(&cm_scacheLock);
+ lock_ObtainWrite(&scp->rw);
+ lock_ObtainWrite(&cm_scacheLock);
+#endif
+ scp->fid = *fidp;
+ scp->volp = volp; /* a held reference */
+
+ if (!cm_freelanceEnabled || !isRoot) {
+ /* if this scache entry represents a volume root then we need
+ * to copy the dotdotFipd from the volume structure where the
+ * "master" copy is stored (defect 11489)
+ */
+ if (scp->fid.vnode == 1 && scp->fid.unique == 1) {
+ scp->dotdotFid = volp->dotdotFid;
+ }
- if (volp->roID == fidp->volume)
+ if (volp->ro.ID == fidp->volume)
scp->flags |= (CM_SCACHEFLAG_PURERO | CM_SCACHEFLAG_RO);
- else if (volp->bkID == fidp->volume)
+ else if (volp->bk.ID == fidp->volume)
scp->flags |= CM_SCACHEFLAG_RO;
- }
- scp->nextp = cm_hashTablep[hash];
- cm_hashTablep[hash] = scp;
+ }
+ scp->nextp = cm_data.scacheHashTablep[hash];
+ cm_data.scacheHashTablep[hash] = scp;
scp->flags |= CM_SCACHEFLAG_INHASH;
- scp->refCount = 1;
+ scp->refCount = 1;
+ osi_Log1(afsd_logp,"cm_GetSCache sets refCount to 1 scp 0x%x", scp);
+#if not_too_dangerous
+ lock_ReleaseWrite(&scp->rw);
+#endif
+
+ /* XXX - The following fields in the cm_scache are
+ * uninitialized:
+ * fileType
+ * parentVnode
+ * parentUnique
+ */
lock_ReleaseWrite(&cm_scacheLock);
/* now we have a held scache entry; just return it */
*outScpp = scp;
+#ifdef DEBUG_REFCOUNT
+ afsi_log("%s:%d cm_GetSCache (4) outScpp 0x%p ref %d", file, line, scp, scp->refCount);
+ osi_Log1(afsd_logp,"cm_GetSCache (4) outScpp 0x%p", scp);
+#endif
return 0;
}
+/* Returns a held reference to the scache's parent
+ * if it exists */
+cm_scache_t * cm_FindSCacheParent(cm_scache_t * scp)
+{
+ long code = 0;
+ int i;
+ cm_fid_t parent_fid;
+ cm_scache_t * pscp = NULL;
+
+ lock_ObtainWrite(&cm_scacheLock);
+ cm_SetFid(&parent_fid, scp->fid.cell, scp->fid.volume, scp->parentVnode, scp->parentUnique);
+
+ if (cm_FidCmp(&scp->fid, &parent_fid)) {
+ i = CM_SCACHE_HASH(&parent_fid);
+ for (pscp = cm_data.scacheHashTablep[i]; pscp; pscp = pscp->nextp) {
+ if (!cm_FidCmp(&pscp->fid, &parent_fid)) {
+ cm_HoldSCacheNoLock(pscp);
+ break;
+ }
+ }
+ }
+
+ lock_ReleaseWrite(&cm_scacheLock);
+
+ return pscp;
+}
+
+void cm_SyncOpAddToWaitQueue(cm_scache_t * scp, afs_int32 flags, cm_buf_t * bufp)
+{
+ cm_scache_waiter_t * w;
+
+ /* Do not use the queue for asynchronous store operations */
+ if (flags == CM_SCACHESYNC_ASYNCSTORE)
+ return;
+
+ lock_ObtainWrite(&cm_scacheLock);
+ if (cm_allFreeWaiters == NULL) {
+ w = malloc(sizeof(*w));
+ memset(w, 0, sizeof(*w));
+ } else {
+ w = (cm_scache_waiter_t *) cm_allFreeWaiters;
+ osi_QRemove(&cm_allFreeWaiters, (osi_queue_t *) w);
+ }
+
+ w->threadId = thrd_Current();
+ w->scp = scp;
+ cm_HoldSCacheNoLock(scp);
+ w->flags = flags;
+ w->bufp = bufp;
+
+ osi_QAddT(&scp->waitQueueH, &scp->waitQueueT, (osi_queue_t *) w);
+ lock_ReleaseWrite(&cm_scacheLock);
+
+ osi_Log2(afsd_logp, "cm_SyncOpAddToWaitQueue : Adding thread to wait queue scp 0x%p w 0x%p", scp, w);
+}
+
+int cm_SyncOpCheckContinue(cm_scache_t * scp, afs_int32 flags, cm_buf_t * bufp)
+{
+ cm_scache_waiter_t * w;
+ int this_is_me;
+
+ /* Do not use the queue for asynchronous store operations */
+ if (flags == CM_SCACHESYNC_ASYNCSTORE)
+ return 1;
+
+ osi_Log0(afsd_logp, "cm_SyncOpCheckContinue checking for continuation");
+
+ lock_ObtainRead(&cm_scacheLock);
+ for (w = (cm_scache_waiter_t *)scp->waitQueueH;
+ w;
+ w = (cm_scache_waiter_t *)osi_QNext((osi_queue_t *) w)) {
+ if (w->flags == flags && w->bufp == bufp) {
+ break;
+ }
+ }
+
+ osi_assertx(w != NULL, "null cm_scache_waiter_t");
+ this_is_me = (w->threadId == thrd_Current());
+ lock_ReleaseRead(&cm_scacheLock);
+
+ if (!this_is_me) {
+ osi_Log1(afsd_logp, "cm_SyncOpCheckContinue MISS: Waiter 0x%p", w);
+ return 0;
+ }
+
+ osi_Log1(afsd_logp, "cm_SyncOpCheckContinue HIT: Waiter 0x%p", w);
+
+ lock_ObtainWrite(&cm_scacheLock);
+ osi_QRemoveHT(&scp->waitQueueH, &scp->waitQueueT, (osi_queue_t *) w);
+ cm_ReleaseSCacheNoLock(scp);
+ memset(w, 0, sizeof(*w));
+ osi_QAdd(&cm_allFreeWaiters, (osi_queue_t *) w);
+ lock_ReleaseWrite(&cm_scacheLock);
+
+ return 1;
+}
+
+
/* synchronize a fetch, store, read, write, fetch status or store status.
* Called with scache mutex held, and returns with it held, but temporarily
* drops it during the fetch.
* is to serialize all StoreData RPC's. This is the reason we defined
* CM_SCACHESYNC_STOREDATA_EXCL and CM_SCACHEFLAG_DATASTORING.
*/
-long cm_SyncOp(cm_scache_t *scp, cm_buf_t *bufp, cm_user_t *up, cm_req_t *reqp,
- long rights, long flags)
+long cm_SyncOp(cm_scache_t *scp, cm_buf_t *bufp, cm_user_t *userp, cm_req_t *reqp,
+ afs_uint32 rights, afs_uint32 flags)
{
- osi_queueData_t *qdp;
- long code;
- cm_buf_t *tbufp;
- long outRights;
- int bufLocked;
-
- /* lookup this first */
- bufLocked = flags & CM_SCACHESYNC_BUFLOCKED;
-
- /* some minor assertions */
- if (flags & (CM_SCACHESYNC_STOREDATA | CM_SCACHESYNC_FETCHDATA
- | CM_SCACHESYNC_READ | CM_SCACHESYNC_WRITE
- | CM_SCACHESYNC_SETSIZE)) {
- if (bufp) {
- osi_assert(bufp->refCount > 0);
- /*
- osi_assert(cm_FidCmp(&bufp->fid, &scp->fid) == 0);
- */
- }
- }
- else osi_assert(bufp == NULL);
-
- /* Do the access check. Now we don't really do the access check
- * atomically, since the caller doesn't expect the parent dir to be
- * returned locked, and that is what we'd have to do to prevent a
- * callback breaking message on the parent due to a setacl call from
- * being processed while we're running. So, instead, we check things
- * here, and if things look fine with the access, we proceed to finish
- * the rest of this check. Sort of a hack, but probably good enough.
- */
-
- while (1) {
- if (flags & CM_SCACHESYNC_FETCHSTATUS) {
- /* if we're bringing in a new status block, ensure that
- * we aren't already doing so, and that no one is
- * changing the status concurrently, either. We need
- * to do this, even if the status is of a different
- * type, since we don't have the ability to figure out,
- * in the AFS 3 protocols, which status-changing
- * operation ran first, or even which order a read and
- * a write occurred in.
- */
- if (scp->flags & (CM_SCACHEFLAG_FETCHING | CM_SCACHEFLAG_STORING
- | CM_SCACHEFLAG_SIZESTORING | CM_SCACHEFLAG_GETCALLBACK))
- goto sleep;
- }
- if (flags & (CM_SCACHESYNC_STORESIZE | CM_SCACHESYNC_STORESTATUS
- | CM_SCACHESYNC_SETSIZE | CM_SCACHESYNC_GETCALLBACK)) {
- /* if we're going to make an RPC to change the status, make sure
- * that no one is bringing in or sending out the status.
- */
- if (scp->flags & (CM_SCACHEFLAG_FETCHING | CM_SCACHEFLAG_STORING
- | CM_SCACHEFLAG_SIZESTORING | CM_SCACHEFLAG_GETCALLBACK))
- goto sleep;
- if (scp->bufReadsp || scp->bufWritesp) goto sleep;
- }
- if (flags & CM_SCACHESYNC_FETCHDATA) {
- /* if we're bringing in a new chunk of data, make sure that
- * nothing is happening to that chunk, and that we aren't
- * changing the basic file status info, either.
- */
- if (scp->flags & (CM_SCACHEFLAG_FETCHING | CM_SCACHEFLAG_STORING
- | CM_SCACHEFLAG_SIZESTORING | CM_SCACHEFLAG_GETCALLBACK))
- goto sleep;
- if (bufp && (bufp->cmFlags & (CM_BUF_CMFETCHING | CM_BUF_CMSTORING)))
- goto sleep;
- }
- if (flags & CM_SCACHESYNC_STOREDATA) {
- /* same as fetch data */
- if (scp->flags & (CM_SCACHEFLAG_FETCHING | CM_SCACHEFLAG_STORING
- | CM_SCACHEFLAG_SIZESTORING | CM_SCACHEFLAG_GETCALLBACK))
- goto sleep;
- if (bufp && (bufp->cmFlags & (CM_BUF_CMFETCHING | CM_BUF_CMSTORING)))
- goto sleep;
- }
+ osi_queueData_t *qdp;
+ long code;
+ cm_buf_t *tbufp;
+ afs_uint32 outRights;
+ int bufLocked;
+ afs_uint32 sleep_scp_flags = 0;
+ afs_uint32 sleep_buf_cmflags = 0;
+ afs_uint32 sleep_scp_bufs = 0;
+ int wakeupCycle;
+
+ /* lookup this first */
+ bufLocked = flags & CM_SCACHESYNC_BUFLOCKED;
+
+ if (bufp)
+ osi_assertx(bufp->refCount > 0, "cm_buf_t refCount 0");
+
+
+ /* Do the access check. Now we don't really do the access check
+ * atomically, since the caller doesn't expect the parent dir to be
+ * returned locked, and that is what we'd have to do to prevent a
+ * callback breaking message on the parent due to a setacl call from
+ * being processed while we're running. So, instead, we check things
+ * here, and if things look fine with the access, we proceed to finish
+ * the rest of this check. Sort of a hack, but probably good enough.
+ */
+
+ while (1) {
+ if (flags & CM_SCACHESYNC_FETCHSTATUS) {
+ /* if we're bringing in a new status block, ensure that
+ * we aren't already doing so, and that no one is
+ * changing the status concurrently, either. We need
+ * to do this, even if the status is of a different
+ * type, since we don't have the ability to figure out,
+ * in the AFS 3 protocols, which status-changing
+ * operation ran first, or even which order a read and
+ * a write occurred in.
+ */
+ if (scp->flags & (CM_SCACHEFLAG_FETCHING | CM_SCACHEFLAG_STORING
+ | CM_SCACHEFLAG_SIZESTORING | CM_SCACHEFLAG_GETCALLBACK)) {
+ osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is FETCHING|STORING|SIZESTORING|GETCALLBACK want FETCHSTATUS", scp);
+ goto sleep;
+ }
+ }
+ if (flags & (CM_SCACHESYNC_STORESIZE | CM_SCACHESYNC_STORESTATUS
+ | CM_SCACHESYNC_SETSIZE | CM_SCACHESYNC_GETCALLBACK)) {
+ /* if we're going to make an RPC to change the status, make sure
+ * that no one is bringing in or sending out the status.
+ */
+ if (scp->flags & (CM_SCACHEFLAG_FETCHING | CM_SCACHEFLAG_STORING |
+ CM_SCACHEFLAG_SIZESTORING | CM_SCACHEFLAG_GETCALLBACK)) {
+ osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is FETCHING|STORING|SIZESTORING|GETCALLBACK want STORESIZE|STORESTATUS|SETSIZE|GETCALLBACK", scp);
+ goto sleep;
+ }
+ if (scp->bufReadsp || scp->bufWritesp) {
+ osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is bufRead|bufWrite want STORESIZE|STORESTATUS|SETSIZE|GETCALLBACK", scp);
+ goto sleep;
+ }
+ }
+ if (flags & CM_SCACHESYNC_FETCHDATA) {
+ /* if we're bringing in a new chunk of data, make sure that
+ * nothing is happening to that chunk, and that we aren't
+ * changing the basic file status info, either.
+ */
+ if (scp->flags & (CM_SCACHEFLAG_FETCHING | CM_SCACHEFLAG_STORING
+ | CM_SCACHEFLAG_SIZESTORING | CM_SCACHEFLAG_GETCALLBACK)) {
+ osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is FETCHING|STORING|SIZESTORING|GETCALLBACK want FETCHDATA", scp);
+ goto sleep;
+ }
+ if (bufp && (bufp->cmFlags & (CM_BUF_CMFETCHING | CM_BUF_CMSTORING | CM_BUF_CMWRITING))) {
+ osi_Log2(afsd_logp, "CM SyncOp scp 0x%p bufp 0x%p is BUF_CMFETCHING|BUF_CMSTORING|BUF_CMWRITING want FETCHDATA", scp, bufp);
+ goto sleep;
+ }
+ }
+ if (flags & CM_SCACHESYNC_STOREDATA) {
+ /* same as fetch data */
+ if (scp->flags & (CM_SCACHEFLAG_FETCHING | CM_SCACHEFLAG_STORING
+ | CM_SCACHEFLAG_SIZESTORING | CM_SCACHEFLAG_GETCALLBACK)) {
+ osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is FETCHING|STORING|SIZESTORING|GETCALLBACK want STOREDATA", scp);
+ goto sleep;
+ }
+ if (bufp && (bufp->cmFlags & (CM_BUF_CMFETCHING | CM_BUF_CMSTORING | CM_BUF_CMWRITING))) {
+ osi_Log2(afsd_logp, "CM SyncOp scp 0x%p bufp 0x%p is BUF_CMFETCHING|BUF_CMSTORING|BUF_CMWRITING want STOREDATA", scp, bufp);
+ goto sleep;
+ }
+ }
- if (flags & CM_SCACHESYNC_STOREDATA_EXCL) {
- /* Don't allow concurrent StoreData RPC's */
- if (scp->flags & CM_SCACHEFLAG_DATASTORING)
- goto sleep;
- }
+ if (flags & CM_SCACHESYNC_STOREDATA_EXCL) {
+ /* Don't allow concurrent StoreData RPC's */
+ if (scp->flags & CM_SCACHEFLAG_DATASTORING) {
+ osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is DATASTORING want STOREDATA_EXCL", scp);
+ goto sleep;
+ }
+ }
- if (flags & CM_SCACHESYNC_ASYNCSTORE) {
- /* Don't allow more than one BKG store request */
- if (scp->flags & CM_SCACHEFLAG_ASYNCSTORING)
- goto sleep;
- }
+ if (flags & CM_SCACHESYNC_ASYNCSTORE) {
+ /* Don't allow more than one BKG store request */
+ if (scp->flags & CM_SCACHEFLAG_ASYNCSTORING) {
+ osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is ASYNCSTORING want ASYNCSTORE", scp);
+ goto sleep;
+ }
+ }
- if (flags & CM_SCACHESYNC_LOCK) {
- /* Don't allow concurrent fiddling with lock lists */
- if (scp->flags & CM_SCACHEFLAG_LOCKING)
- goto sleep;
- }
+ if (flags & CM_SCACHESYNC_LOCK) {
+ /* Don't allow concurrent fiddling with lock lists */
+ if (scp->flags & CM_SCACHEFLAG_LOCKING) {
+ osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is LOCKING want LOCK", scp);
+ goto sleep;
+ }
+ }
- /* now the operations that don't correspond to making RPCs */
- if (flags & CM_SCACHESYNC_GETSTATUS) {
- /* we can use the status that's here, if we're not
- * bringing in new status.
- */
- if (scp->flags & (CM_SCACHEFLAG_FETCHING))
- goto sleep;
- }
- if (flags & CM_SCACHESYNC_SETSTATUS) {
- /* we can make a change to the local status, as long as
- * the status isn't changing now.
- *
- * If we're fetching or storing a chunk of data, we can
- * change the status locally, since the fetch/store
- * operations don't change any of the data that we're
- * changing here.
- */
- if (scp->flags & (CM_SCACHEFLAG_FETCHING | CM_SCACHEFLAG_STORING
- | CM_SCACHEFLAG_SIZESTORING))
- goto sleep;
- }
- if (flags & CM_SCACHESYNC_READ) {
- /* we're going to read the data, make sure that the
- * status is available, and that the data is here. It
- * is OK to read while storing the data back.
- */
- if (scp->flags & CM_SCACHEFLAG_FETCHING)
- goto sleep;
- if (bufp && ((bufp->cmFlags
- & (CM_BUF_CMFETCHING
- | CM_BUF_CMFULLYFETCHED))
- == CM_BUF_CMFETCHING))
- goto sleep;
- }
- if (flags & CM_SCACHESYNC_WRITE) {
- /* don't write unless the status is stable and the chunk
- * is stable.
- */
- if (scp->flags & (CM_SCACHEFLAG_FETCHING | CM_SCACHEFLAG_STORING
- | CM_SCACHEFLAG_SIZESTORING))
- goto sleep;
- if (bufp && (bufp->cmFlags & (CM_BUF_CMFETCHING | CM_BUF_CMSTORING)))
- goto sleep;
- }
+ /* now the operations that don't correspond to making RPCs */
+ if (flags & CM_SCACHESYNC_GETSTATUS) {
+ /* we can use the status that's here, if we're not
+ * bringing in new status.
+ */
+ if (scp->flags & (CM_SCACHEFLAG_FETCHING)) {
+ osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is FETCHING want GETSTATUS", scp);
+ goto sleep;
+ }
+ }
+ if (flags & CM_SCACHESYNC_SETSTATUS) {
+ /* we can make a change to the local status, as long as
+ * the status isn't changing now.
+ *
+ * If we're fetching or storing a chunk of data, we can
+ * change the status locally, since the fetch/store
+ * operations don't change any of the data that we're
+ * changing here.
+ */
+ if (scp->flags & (CM_SCACHEFLAG_FETCHING | CM_SCACHEFLAG_STORING | CM_SCACHEFLAG_SIZESTORING)) {
+ osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is FETCHING|STORING|SIZESTORING want SETSTATUS", scp);
+ goto sleep;
+ }
+ }
+ if (flags & CM_SCACHESYNC_READ) {
+ /* we're going to read the data, make sure that the
+ * status is available, and that the data is here. It
+ * is OK to read while storing the data back.
+ */
+ if (scp->flags & CM_SCACHEFLAG_FETCHING) {
+ osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is FETCHING want READ", scp);
+ goto sleep;
+ }
+ if (bufp && ((bufp->cmFlags & (CM_BUF_CMFETCHING | CM_BUF_CMFULLYFETCHED)) == CM_BUF_CMFETCHING)) {
+ osi_Log2(afsd_logp, "CM SyncOp scp 0x%p bufp 0x%p is BUF_CMFETCHING want READ", scp, bufp);
+ goto sleep;
+ }
+ if (bufp && (bufp->cmFlags & CM_BUF_CMWRITING)) {
+ osi_Log2(afsd_logp, "CM SyncOp scp 0x%p bufp 0x%p is BUF_CMWRITING want READ", scp, bufp);
+ goto sleep;
+ }
+ }
+ if (flags & CM_SCACHESYNC_WRITE) {
+ /* don't write unless the status is stable and the chunk
+ * is stable.
+ */
+ if (scp->flags & (CM_SCACHEFLAG_FETCHING | CM_SCACHEFLAG_STORING
+ | CM_SCACHEFLAG_SIZESTORING)) {
+ osi_Log1(afsd_logp, "CM SyncOp scp 0x%p is FETCHING|STORING|SIZESTORING want WRITE", scp);
+ goto sleep;
+ }
+ if (bufp && (bufp->cmFlags & (CM_BUF_CMFETCHING |
+ CM_BUF_CMSTORING |
+ CM_BUF_CMWRITING))) {
+ osi_Log3(afsd_logp, "CM SyncOp scp 0x%p bufp 0x%p is %s want WRITE",
+ scp, bufp,
+ ((bufp->cmFlags & CM_BUF_CMFETCHING) ? "CM_BUF_CMFETCHING":
+ ((bufp->cmFlags & CM_BUF_CMSTORING) ? "CM_BUF_CMSTORING" :
+ ((bufp->cmFlags & CM_BUF_CMWRITING) ? "CM_BUF_CMWRITING" :
+ "UNKNOWN!!!"))));
+ goto sleep;
+ }
+ }
- // yj: modified this so that callback only checked if we're
- // not checking something on /afs
- if ( (flags & CM_SCACHESYNC_NEEDCALLBACK)
+ // yj: modified this so that callback only checked if we're
+ // not checking something on /afs
+ /* fix the conditional to match the one in cm_HaveCallback */
+ if ((flags & CM_SCACHESYNC_NEEDCALLBACK)
#ifdef AFS_FREELANCE_CLIENT
- && (!cm_freelanceEnabled || !(!(scp->fid.vnode==0x1 &&
- scp->fid.unique==0x1) &&
- scp->fid.cell==AFS_FAKE_ROOT_CELL_ID &&
- scp->fid.volume==AFS_FAKE_ROOT_VOL_ID))
+ && (!cm_freelanceEnabled ||
+ !(scp->fid.vnode==0x1 && scp->fid.unique==0x1) ||
+ scp->fid.cell!=AFS_FAKE_ROOT_CELL_ID ||
+ scp->fid.volume!=AFS_FAKE_ROOT_VOL_ID ||
+ cm_fakeDirCallback < 2)
#endif /* AFS_FREELANCE_CLIENT */
- ) {
- if (!cm_HaveCallback(scp)) {
- osi_Log1(afsd_logp, "CM SyncOp getting callback on scp %x",
- (long) scp);
- if (bufLocked) lock_ReleaseMutex(&bufp->mx);
- code = cm_GetCallback(scp, up, reqp, 0);
- if (bufLocked) {
- lock_ReleaseMutex(&scp->mx);
- lock_ObtainMutex(&bufp->mx);
- lock_ObtainMutex(&scp->mx);
- }
- if (code) return code;
- continue;
- }
+ ) {
+ if ((flags & CM_SCACHESYNC_FORCECB) || !cm_HaveCallback(scp)) {
+ osi_Log1(afsd_logp, "CM SyncOp getting callback on scp 0x%p",
+ scp);
+ if (bufLocked)
+ lock_ReleaseMutex(&bufp->mx);
+ code = cm_GetCallback(scp, userp, reqp, (flags & CM_SCACHESYNC_FORCECB)?1:0);
+ if (bufLocked) {
+ lock_ReleaseWrite(&scp->rw);
+ lock_ObtainMutex(&bufp->mx);
+ lock_ObtainWrite(&scp->rw);
}
-
- if (rights) {
- /* can't check access rights without a callback */
- osi_assert(flags & CM_SCACHESYNC_NEEDCALLBACK);
-
- if ((rights & PRSFS_WRITE) && (scp->flags & CM_SCACHEFLAG_RO))
- return CM_ERROR_READONLY;
-
- if (cm_HaveAccessRights(scp, up, rights, &outRights)) {
- if (~outRights & rights) return CM_ERROR_NOACCESS;
- }
- else {
- /* we don't know the required access rights */
- if (bufLocked) lock_ReleaseMutex(&bufp->mx);
- code = cm_GetAccessRights(scp, up, reqp);
- if (code) return code;
- if (bufLocked) {
- lock_ReleaseMutex(&scp->mx);
- lock_ObtainMutex(&bufp->mx);
- lock_ObtainMutex(&scp->mx);
- }
- continue;
- }
+ if (code)
+ return code;
+ flags &= ~CM_SCACHESYNC_FORCECB; /* only force once */
+ continue;
+ }
+ }
+
+ if (rights) {
+ /* can't check access rights without a callback */
+ osi_assertx(flags & CM_SCACHESYNC_NEEDCALLBACK, "!CM_SCACHESYNC_NEEDCALLBACK");
+
+ if ((rights & PRSFS_WRITE) && (scp->flags & CM_SCACHEFLAG_RO))
+ return CM_ERROR_READONLY;
+
+ if (cm_HaveAccessRights(scp, userp, rights, &outRights)) {
+ if (~outRights & rights)
+ return CM_ERROR_NOACCESS;
+ }
+ else {
+ /* we don't know the required access rights */
+ if (bufLocked) lock_ReleaseMutex(&bufp->mx);
+ code = cm_GetAccessRights(scp, userp, reqp);
+ if (bufLocked) {
+ lock_ReleaseWrite(&scp->rw);
+ lock_ObtainMutex(&bufp->mx);
+ lock_ObtainWrite(&scp->rw);
}
+ if (code)
+ return code;
+ continue;
+ }
+ }
- /* if we get here, we're happy */
- break;
-
-sleep:
- /* first check if we're not supposed to wait: fail
- * in this case, returning with everything still locked.
- */
- if (flags & CM_SCACHESYNC_NOWAIT) return CM_ERROR_WOULDBLOCK;
-
- /* wait here, then try again */
- osi_Log1(afsd_logp, "CM SyncOp sleeping scp %x", (long) scp);
- if ( scp->flags & CM_SCACHEFLAG_WAITING )
- osi_Log1(afsd_logp, "CM SyncOp CM_SCACHEFLAG_WAITING already set for 0x%x", scp);
- else
- osi_Log1(afsd_logp, "CM SyncOp CM_SCACHEFLAG_WAITING set for 0x%x", scp);
- scp->flags |= CM_SCACHEFLAG_WAITING;
- if (bufLocked) lock_ReleaseMutex(&bufp->mx);
- osi_SleepM((long) &scp->flags, &scp->mx);
- osi_Log0(afsd_logp, "CM SyncOp woke!");
- if (bufLocked) lock_ObtainMutex(&bufp->mx);
- lock_ObtainMutex(&scp->mx);
- } /* big while loop */
-
- /* now, update the recorded state for RPC-type calls */
- if (flags & CM_SCACHESYNC_FETCHSTATUS)
- scp->flags |= CM_SCACHEFLAG_FETCHING;
- if (flags & CM_SCACHESYNC_STORESTATUS)
- scp->flags |= CM_SCACHEFLAG_STORING;
- if (flags & CM_SCACHESYNC_STORESIZE)
- scp->flags |= CM_SCACHEFLAG_SIZESTORING;
- if (flags & CM_SCACHESYNC_GETCALLBACK)
- scp->flags |= CM_SCACHEFLAG_GETCALLBACK;
- if (flags & CM_SCACHESYNC_STOREDATA_EXCL)
- scp->flags |= CM_SCACHEFLAG_DATASTORING;
- if (flags & CM_SCACHESYNC_ASYNCSTORE)
- scp->flags |= CM_SCACHEFLAG_ASYNCSTORING;
- if (flags & CM_SCACHESYNC_LOCK)
- scp->flags |= CM_SCACHEFLAG_LOCKING;
-
- /* now update the buffer pointer */
- if (flags & CM_SCACHESYNC_FETCHDATA) {
- /* ensure that the buffer isn't already in the I/O list */
- if (bufp) {
- for(qdp = scp->bufReadsp; qdp; qdp = (osi_queueData_t *) osi_QNext(&qdp->q)) {
- tbufp = osi_GetQData(qdp);
- osi_assert(tbufp != bufp);
- }
- }
-
- /* queue a held reference to the buffer in the "reading" I/O list */
- qdp = osi_QDAlloc();
- osi_SetQData(qdp, bufp);
- if (bufp) {
- buf_Hold(bufp);
- bufp->cmFlags |= CM_BUF_CMFETCHING;
- }
- osi_QAdd((osi_queue_t **) &scp->bufReadsp, &qdp->q);
+ /* if we get here, we're happy */
+ break;
+
+ sleep:
+ /* first check if we're not supposed to wait: fail
+ * in this case, returning with everything still locked.
+ */
+ if (flags & CM_SCACHESYNC_NOWAIT)
+ return CM_ERROR_WOULDBLOCK;
+
+ /* These are used for minidump debugging */
+ sleep_scp_flags = scp->flags; /* so we know why we slept */
+ sleep_buf_cmflags = bufp ? bufp->cmFlags : 0;
+ sleep_scp_bufs = (scp->bufReadsp ? 1 : 0) | (scp->bufWritesp ? 2 : 0);
+
+ /* wait here, then try again */
+ osi_Log1(afsd_logp, "CM SyncOp sleeping scp 0x%p", scp);
+ if ( scp->flags & CM_SCACHEFLAG_WAITING ) {
+ scp->waitCount++;
+ scp->waitRequests++;
+ osi_Log3(afsd_logp, "CM SyncOp CM_SCACHEFLAG_WAITING already set for 0x%p; %d threads; %d requests",
+ scp, scp->waitCount, scp->waitRequests);
+ } else {
+ osi_Log1(afsd_logp, "CM SyncOp CM_SCACHEFLAG_WAITING set for 0x%p", scp);
+ scp->flags |= CM_SCACHEFLAG_WAITING;
+ scp->waitCount = scp->waitRequests = 1;
}
- if (flags & CM_SCACHESYNC_STOREDATA) {
- /* ensure that the buffer isn't already in the I/O list */
- if (bufp) {
- for(qdp = scp->bufWritesp; qdp; qdp = (osi_queueData_t *) osi_QNext(&qdp->q)) {
- tbufp = osi_GetQData(qdp);
- osi_assert(tbufp != bufp);
- }
- }
-
- /* queue a held reference to the buffer in the "writing" I/O list */
- qdp = osi_QDAlloc();
- osi_SetQData(qdp, bufp);
- if (bufp) {
- buf_Hold(bufp);
- bufp->cmFlags |= CM_BUF_CMSTORING;
- }
- osi_QAdd((osi_queue_t **) &scp->bufWritesp, &qdp->q);
+ cm_SyncOpAddToWaitQueue(scp, flags, bufp);
+ wakeupCycle = 0;
+ do {
+ if (bufLocked)
+ lock_ReleaseMutex(&bufp->mx);
+ osi_SleepW((LONG_PTR) &scp->flags, &scp->rw);
+ if (bufLocked)
+ lock_ObtainMutex(&bufp->mx);
+ lock_ObtainWrite(&scp->rw);
+ } while (!cm_SyncOpCheckContinue(scp, flags, bufp));
+
+ smb_UpdateServerPriority();
+
+ scp->waitCount--;
+ osi_Log3(afsd_logp, "CM SyncOp woke! scp 0x%p; still waiting %d threads of %d requests",
+ scp, scp->waitCount, scp->waitRequests);
+ if (scp->waitCount == 0) {
+ osi_Log1(afsd_logp, "CM SyncOp CM_SCACHEFLAG_WAITING reset for 0x%p", scp);
+ scp->flags &= ~CM_SCACHEFLAG_WAITING;
+ scp->waitRequests = 0;
}
+ } /* big while loop */
- return 0;
+ /* now, update the recorded state for RPC-type calls */
+ if (flags & CM_SCACHESYNC_FETCHSTATUS)
+ scp->flags |= CM_SCACHEFLAG_FETCHING;
+ if (flags & CM_SCACHESYNC_STORESTATUS)
+ scp->flags |= CM_SCACHEFLAG_STORING;
+ if (flags & CM_SCACHESYNC_STORESIZE)
+ scp->flags |= CM_SCACHEFLAG_SIZESTORING;
+ if (flags & CM_SCACHESYNC_GETCALLBACK)
+ scp->flags |= CM_SCACHEFLAG_GETCALLBACK;
+ if (flags & CM_SCACHESYNC_STOREDATA_EXCL)
+ scp->flags |= CM_SCACHEFLAG_DATASTORING;
+ if (flags & CM_SCACHESYNC_ASYNCSTORE)
+ scp->flags |= CM_SCACHEFLAG_ASYNCSTORING;
+ if (flags & CM_SCACHESYNC_LOCK)
+ scp->flags |= CM_SCACHEFLAG_LOCKING;
+
+ /* now update the buffer pointer */
+ if (flags & CM_SCACHESYNC_FETCHDATA) {
+ /* ensure that the buffer isn't already in the I/O list */
+ if (bufp) {
+ for(qdp = scp->bufReadsp; qdp; qdp = (osi_queueData_t *) osi_QNext(&qdp->q)) {
+ tbufp = osi_GetQData(qdp);
+ osi_assertx(tbufp != bufp, "unexpected cm_buf_t value");
+ }
+ }
+
+ /* queue a held reference to the buffer in the "reading" I/O list */
+ qdp = osi_QDAlloc();
+ osi_SetQData(qdp, bufp);
+ if (bufp) {
+ buf_Hold(bufp);
+ bufp->cmFlags |= CM_BUF_CMFETCHING;
+ }
+ osi_QAdd((osi_queue_t **) &scp->bufReadsp, &qdp->q);
+ }
+
+ if (flags & CM_SCACHESYNC_STOREDATA) {
+ /* ensure that the buffer isn't already in the I/O list */
+ if (bufp) {
+ for(qdp = scp->bufWritesp; qdp; qdp = (osi_queueData_t *) osi_QNext(&qdp->q)) {
+ tbufp = osi_GetQData(qdp);
+ osi_assertx(tbufp != bufp, "unexpected cm_buf_t value");
+ }
+ }
+
+ /* queue a held reference to the buffer in the "writing" I/O list */
+ qdp = osi_QDAlloc();
+ osi_SetQData(qdp, bufp);
+ if (bufp) {
+ buf_Hold(bufp);
+ bufp->cmFlags |= CM_BUF_CMSTORING;
+ }
+ osi_QAdd((osi_queue_t **) &scp->bufWritesp, &qdp->q);
+ }
+
+ if (flags & CM_SCACHESYNC_WRITE) {
+ /* mark the buffer as being written to. */
+ if (bufp) {
+ bufp->cmFlags |= CM_BUF_CMWRITING;
+ }
+ }
+
+ return 0;
}
/* for those syncops that setup for RPCs.
* Called with scache locked.
*/
-void cm_SyncOpDone(cm_scache_t *scp, cm_buf_t *bufp, long flags)
+void cm_SyncOpDone(cm_scache_t *scp, cm_buf_t *bufp, afs_uint32 flags)
{
- osi_queueData_t *qdp;
- cm_buf_t *tbufp;
-
- /* now, update the recorded state for RPC-type calls */
- if (flags & CM_SCACHESYNC_FETCHSTATUS)
- scp->flags &= ~CM_SCACHEFLAG_FETCHING;
- if (flags & CM_SCACHESYNC_STORESTATUS)
- scp->flags &= ~CM_SCACHEFLAG_STORING;
- if (flags & CM_SCACHESYNC_STORESIZE)
- scp->flags &= ~CM_SCACHEFLAG_SIZESTORING;
- if (flags & CM_SCACHESYNC_GETCALLBACK)
- scp->flags &= ~CM_SCACHEFLAG_GETCALLBACK;
- if (flags & CM_SCACHESYNC_STOREDATA_EXCL)
- scp->flags &= ~CM_SCACHEFLAG_DATASTORING;
- if (flags & CM_SCACHESYNC_ASYNCSTORE)
- scp->flags &= ~CM_SCACHEFLAG_ASYNCSTORING;
- if (flags & CM_SCACHESYNC_LOCK)
- scp->flags &= ~CM_SCACHEFLAG_LOCKING;
-
- /* now update the buffer pointer */
- if (flags & CM_SCACHESYNC_FETCHDATA) {
- /* ensure that the buffer isn't already in the I/O list */
- for(qdp = scp->bufReadsp; qdp; qdp = (osi_queueData_t *) osi_QNext(&qdp->q)) {
- tbufp = osi_GetQData(qdp);
- if (tbufp == bufp) break;
- }
- osi_assert(qdp != NULL);
- osi_assert(osi_GetQData(qdp) == bufp);
- osi_QRemove((osi_queue_t **) &scp->bufReadsp, &qdp->q);
- osi_QDFree(qdp);
- if (bufp) {
- bufp->cmFlags &=
- ~(CM_BUF_CMFETCHING | CM_BUF_CMFULLYFETCHED);
- buf_Release(bufp);
- }
+ osi_queueData_t *qdp;
+ cm_buf_t *tbufp;
+
+ lock_AssertWrite(&scp->rw);
+
+ /* now, update the recorded state for RPC-type calls */
+ if (flags & CM_SCACHESYNC_FETCHSTATUS)
+ scp->flags &= ~CM_SCACHEFLAG_FETCHING;
+ if (flags & CM_SCACHESYNC_STORESTATUS)
+ scp->flags &= ~CM_SCACHEFLAG_STORING;
+ if (flags & CM_SCACHESYNC_STORESIZE)
+ scp->flags &= ~CM_SCACHEFLAG_SIZESTORING;
+ if (flags & CM_SCACHESYNC_GETCALLBACK)
+ scp->flags &= ~CM_SCACHEFLAG_GETCALLBACK;
+ if (flags & CM_SCACHESYNC_STOREDATA_EXCL)
+ scp->flags &= ~CM_SCACHEFLAG_DATASTORING;
+ if (flags & CM_SCACHESYNC_ASYNCSTORE)
+ scp->flags &= ~CM_SCACHEFLAG_ASYNCSTORING;
+ if (flags & CM_SCACHESYNC_LOCK)
+ scp->flags &= ~CM_SCACHEFLAG_LOCKING;
+
+ /* now update the buffer pointer */
+ if (flags & CM_SCACHESYNC_FETCHDATA) {
+ int release = 0;
+
+ /* ensure that the buffer isn't already in the I/O list */
+ for(qdp = scp->bufReadsp; qdp; qdp = (osi_queueData_t *) osi_QNext(&qdp->q)) {
+ tbufp = osi_GetQData(qdp);
+ if (tbufp == bufp)
+ break;
+ }
+ if (qdp) {
+ osi_QRemove((osi_queue_t **) &scp->bufReadsp, &qdp->q);
+ osi_QDFree(qdp);
+ release = 1;
+ }
+ if (bufp) {
+ bufp->cmFlags &= ~(CM_BUF_CMFETCHING | CM_BUF_CMFULLYFETCHED);
+ if (bufp->flags & CM_BUF_WAITING) {
+ osi_Log2(afsd_logp, "CM SyncOpDone Waking [scp 0x%p] bufp 0x%p", scp, bufp);
+ osi_Wakeup((LONG_PTR) &bufp);
+ }
+ if (release)
+ buf_Release(bufp);
}
+ }
- /* now update the buffer pointer */
- if (flags & CM_SCACHESYNC_STOREDATA) {
- /* ensure that the buffer isn't already in the I/O list */
- for(qdp = scp->bufWritesp; qdp; qdp = (osi_queueData_t *) osi_QNext(&qdp->q)) {
- tbufp = osi_GetQData(qdp);
- if (tbufp == bufp) break;
- }
- osi_assert(qdp != NULL);
- osi_assert(osi_GetQData(qdp) == bufp);
- osi_QRemove((osi_queue_t **) &scp->bufWritesp, &qdp->q);
- osi_QDFree(qdp);
- if (bufp) {
- bufp->cmFlags &= ~CM_BUF_CMSTORING;
- buf_Release(bufp);
- }
+ /* now update the buffer pointer */
+ if (flags & CM_SCACHESYNC_STOREDATA) {
+ int release = 0;
+ /* ensure that the buffer isn't already in the I/O list */
+ for(qdp = scp->bufWritesp; qdp; qdp = (osi_queueData_t *) osi_QNext(&qdp->q)) {
+ tbufp = osi_GetQData(qdp);
+ if (tbufp == bufp)
+ break;
}
-
- /* and wakeup anyone who is waiting */
- if (scp->flags & CM_SCACHEFLAG_WAITING) {
- osi_Log1(afsd_logp, "CM SyncOp CM_SCACHEFLAG_WAITING reset for 0x%x", scp);
- scp->flags &= ~CM_SCACHEFLAG_WAITING;
- osi_Wakeup((long) &scp->flags);
+ if (qdp) {
+ osi_QRemove((osi_queue_t **) &scp->bufWritesp, &qdp->q);
+ osi_QDFree(qdp);
+ release = 1;
+ }
+ if (bufp) {
+ bufp->cmFlags &= ~CM_BUF_CMSTORING;
+ if (bufp->flags & CM_BUF_WAITING) {
+ osi_Log2(afsd_logp, "CM SyncOpDone Waking [scp 0x%p] bufp 0x%p", scp, bufp);
+ osi_Wakeup((LONG_PTR) &bufp);
+ }
+ if (release)
+ buf_Release(bufp);
}
-}
+ }
+
+ if (flags & CM_SCACHESYNC_WRITE) {
+ if (bufp) {
+ osi_assertx(bufp->cmFlags & CM_BUF_CMWRITING, "!CM_BUF_CMWRITING");
+
+ bufp->cmFlags &= ~CM_BUF_CMWRITING;
+ }
+ }
+
+ /* and wakeup anyone who is waiting */
+ if (scp->flags & CM_SCACHEFLAG_WAITING) {
+ osi_Log1(afsd_logp, "CM SyncOpDone Waking scp 0x%p", scp);
+ osi_Wakeup((LONG_PTR) &scp->flags);
+ }
+}
/* merge in a response from an RPC. The scp must be locked, and the callback
* is optional.
* handled after the callback breaking is done, but only one of whose calls
* started before that, can cause old info to be merged from the first call.
*/
-void cm_MergeStatus(cm_scache_t *scp, AFSFetchStatus *statusp, AFSVolSync *volp,
- cm_user_t *userp, int flags)
+void cm_MergeStatus(cm_scache_t *dscp,
+ cm_scache_t *scp, AFSFetchStatus *statusp,
+ AFSVolSync *volsyncp,
+ cm_user_t *userp, afs_uint32 flags)
{
- // yj: i want to create some fake status for the /afs directory and the
- // entries under that directory
+ afs_uint64 dataVersion;
+
+ // yj: i want to create some fake status for the /afs directory and the
+ // entries under that directory
#ifdef AFS_FREELANCE_CLIENT
- if (cm_freelanceEnabled && scp == cm_rootSCachep) {
- osi_Log0(afsd_logp,"cm_MergeStatus Freelance cm_rootSCachep");
- statusp->InterfaceVersion = 0x1;
- statusp->FileType = 0x2;
- statusp->LinkCount = scp->linkCount;
- statusp->Length = cm_fakeDirSize;
- statusp->DataVersion = cm_fakeDirVersion;
- statusp->Author = 0x1;
- statusp->Owner = 0x0;
- statusp->CallerAccess = 0x9;
- statusp->AnonymousAccess = 0x9;
- statusp->UnixModeBits = 0x1ff;
- statusp->ParentVnode = 0x1;
- statusp->ParentUnique = 0x1;
- statusp->ResidencyMask = 0;
- statusp->ClientModTime = FakeFreelanceModTime;
- statusp->ServerModTime = FakeFreelanceModTime;
- statusp->Group = 0;
- statusp->SyncCounter = 0;
- statusp->dataVersionHigh = 0;
- }
+ if (cm_freelanceEnabled && scp == cm_data.rootSCachep) {
+ osi_Log0(afsd_logp,"cm_MergeStatus Freelance cm_data.rootSCachep");
+ statusp->InterfaceVersion = 0x1;
+ statusp->FileType = CM_SCACHETYPE_DIRECTORY;
+ statusp->LinkCount = scp->linkCount;
+ statusp->Length = cm_fakeDirSize;
+ statusp->Length_hi = 0;
+ statusp->DataVersion = (afs_uint32)(cm_data.fakeDirVersion & 0xFFFFFFFF);
+ statusp->Author = 0x1;
+ statusp->Owner = 0x0;
+ statusp->CallerAccess = 0x9;
+ statusp->AnonymousAccess = 0x9;
+ statusp->UnixModeBits = 0777;
+ statusp->ParentVnode = 0x1;
+ statusp->ParentUnique = 0x1;
+ statusp->ResidencyMask = 0;
+ statusp->ClientModTime = FakeFreelanceModTime;
+ statusp->ServerModTime = FakeFreelanceModTime;
+ statusp->Group = 0;
+ statusp->SyncCounter = 0;
+ statusp->dataVersionHigh = (afs_uint32)(cm_data.fakeDirVersion >> 32);
+ statusp->errorCode = 0;
+ }
#endif /* AFS_FREELANCE_CLIENT */
- if (!(flags & CM_MERGEFLAG_FORCE)
- && statusp->DataVersion < (unsigned long) scp->dataVersion) {
- struct cm_cell *cellp;
- struct cm_volume *volp;
-
- cellp = cm_FindCellByID(scp->fid.cell);
- cm_GetVolumeByID(cellp, scp->fid.volume, userp,
- (cm_req_t *) NULL, &volp);
- if (scp->cbServerp)
- osi_Log2(afsd_logp, "old data from server %x volume %s",
- scp->cbServerp->addr.sin_addr.s_addr,
- volp->namep);
- osi_Log3(afsd_logp, "Bad merge, scp %x, scp dv %d, RPC dv %d",
- scp, scp->dataVersion, statusp->DataVersion);
- /* we have a number of data fetch/store operations running
- * concurrently, and we can tell which one executed last at the
- * server by its mtime.
- * Choose the one with the largest mtime, and ignore the rest.
- *
- * These concurrent calls are incompatible with setting the
- * mtime, so we won't have a locally changed mtime here.
- *
- * We could also have ACL info for a different user than usual,
- * in which case we have to do that part of the merge, anyway.
- * We won't have to worry about the info being old, since we
- * won't have concurrent calls
- * that change file status running from this machine.
- *
- * Added 3/17/98: if we see data version regression on an RO
- * file, it's probably due to a server holding an out-of-date
- * replica, rather than to concurrent RPC's. Failures to
- * release replicas are now flagged by the volserver, but only
- * since AFS 3.4 5.22, so there are plenty of clients getting
- * out-of-date replicas out there.
- *
- * If we discover an out-of-date replica, by this time it's too
- * late to go to another server and retry. Also, we can't
- * reject the merge, because then there is no way for
- * GetAccess to do its work, and the caller gets into an
- * infinite loop. So we just grin and bear it.
- */
- if (!(scp->flags & CM_SCACHEFLAG_RO))
- return;
- }
- scp->serverModTime = statusp->ServerModTime;
+ if (statusp->errorCode != 0) {
+ scp->flags |= CM_SCACHEFLAG_EACCESS;
+ osi_Log2(afsd_logp, "Merge, Failure scp %x code 0x%x", scp, statusp->errorCode);
- if (!(scp->mask & CM_SCACHEMASK_CLIENTMODTIME)) {
- scp->clientModTime = statusp->ClientModTime;
- }
- if (!(scp->mask & CM_SCACHEMASK_LENGTH)) {
- scp->length.LowPart = statusp->Length;
- scp->length.HighPart = 0;
- }
+ scp->fileType = 0; /* unknown */
- scp->serverLength.LowPart = statusp->Length;
+ scp->serverModTime = 0;
+ scp->clientModTime = 0;
+ scp->length.LowPart = 0;
+ scp->length.HighPart = 0;
+ scp->serverLength.LowPart = 0;
scp->serverLength.HighPart = 0;
+ scp->linkCount = 0;
+ scp->owner = 0;
+ scp->group = 0;
+ scp->unixModeBits = 0;
+ scp->anyAccess = 0;
+ scp->dataVersion = 0;
+ scp->bufDataVersionLow = 0;
+
+ if (dscp) {
+ scp->parentVnode = dscp->fid.vnode;
+ scp->parentUnique = dscp->fid.unique;
+ } else {
+ scp->parentVnode = 0;
+ scp->parentUnique = 0;
+ }
+ return;
+ } else {
+ scp->flags &= ~CM_SCACHEFLAG_EACCESS;
+ }
- scp->linkCount = statusp->LinkCount;
- scp->dataVersion = statusp->DataVersion;
- scp->owner = statusp->Owner;
- scp->group = statusp->Group;
- scp->unixModeBits = statusp->UnixModeBits & 07777;
-
- if (statusp->FileType == File)
- scp->fileType = CM_SCACHETYPE_FILE;
- else if (statusp->FileType == Directory)
- scp->fileType = CM_SCACHETYPE_DIRECTORY;
- else if (statusp->FileType == SymbolicLink) {
- if ((scp->unixModeBits & 0111) == 0)
- scp->fileType = CM_SCACHETYPE_MOUNTPOINT;
- else
- scp->fileType = CM_SCACHETYPE_SYMLINK;
+ dataVersion = statusp->dataVersionHigh;
+ dataVersion <<= 32;
+ dataVersion |= statusp->DataVersion;
+
+ if (!(flags & CM_MERGEFLAG_FORCE) && dataVersion < scp->dataVersion) {
+ struct cm_cell *cellp;
+
+ cellp = cm_FindCellByID(scp->fid.cell, 0);
+ if (scp->cbServerp) {
+ struct cm_volume *volp = NULL;
+
+ cm_GetVolumeByID(cellp, scp->fid.volume, userp,
+ (cm_req_t *) NULL, CM_GETVOL_FLAG_CREATE, &volp);
+ osi_Log2(afsd_logp, "old data from server %x volume %s",
+ scp->cbServerp->addr.sin_addr.s_addr,
+ volp ? volp->namep : "(unknown)");
+ if (volp)
+ cm_PutVolume(volp);
}
- else scp->fileType = 0; /* invalid */
+ osi_Log3(afsd_logp, "Bad merge, scp %x, scp dv %d, RPC dv %d",
+ scp, scp->dataVersion, dataVersion);
+ /* we have a number of data fetch/store operations running
+ * concurrently, and we can tell which one executed last at the
+ * server by its mtime.
+ * Choose the one with the largest mtime, and ignore the rest.
+ *
+ * These concurrent calls are incompatible with setting the
+ * mtime, so we won't have a locally changed mtime here.
+ *
+ * We could also have ACL info for a different user than usual,
+ * in which case we have to do that part of the merge, anyway.
+ * We won't have to worry about the info being old, since we
+ * won't have concurrent calls
+ * that change file status running from this machine.
+ *
+ * Added 3/17/98: if we see data version regression on an RO
+ * file, it's probably due to a server holding an out-of-date
+ * replica, rather than to concurrent RPC's. Failures to
+ * release replicas are now flagged by the volserver, but only
+ * since AFS 3.4 5.22, so there are plenty of clients getting
+ * out-of-date replicas out there.
+ *
+ * If we discover an out-of-date replica, by this time it's too
+ * late to go to another server and retry. Also, we can't
+ * reject the merge, because then there is no way for
+ * GetAccess to do its work, and the caller gets into an
+ * infinite loop. So we just grin and bear it.
+ */
+ if (!(scp->flags & CM_SCACHEFLAG_RO))
+ return;
+ }
+
+ scp->serverModTime = statusp->ServerModTime;
- /* and other stuff */
- scp->parentVnode = statusp->ParentVnode;
- scp->parentUnique = statusp->ParentUnique;
+ if (!(scp->mask & CM_SCACHEMASK_CLIENTMODTIME)) {
+ scp->clientModTime = statusp->ClientModTime;
+ }
+ if (!(scp->mask & CM_SCACHEMASK_LENGTH)) {
+ scp->length.LowPart = statusp->Length;
+ scp->length.HighPart = statusp->Length_hi;
+ }
+
+ scp->serverLength.LowPart = statusp->Length;
+ scp->serverLength.HighPart = statusp->Length_hi;
+
+ scp->linkCount = statusp->LinkCount;
+ scp->owner = statusp->Owner;
+ scp->group = statusp->Group;
+ scp->unixModeBits = statusp->UnixModeBits & 07777;
+
+ if (statusp->FileType == File)
+ scp->fileType = CM_SCACHETYPE_FILE;
+ else if (statusp->FileType == Directory)
+ scp->fileType = CM_SCACHETYPE_DIRECTORY;
+ else if (statusp->FileType == SymbolicLink) {
+ if ((scp->unixModeBits & 0111) == 0)
+ scp->fileType = CM_SCACHETYPE_MOUNTPOINT;
+ else
+ scp->fileType = CM_SCACHETYPE_SYMLINK;
+ }
+ else {
+ osi_Log2(afsd_logp, "Merge, Invalid File Type (%d), scp %x", statusp->FileType, scp);
+ scp->fileType = CM_SCACHETYPE_INVALID; /* invalid */
+ }
+ /* and other stuff */
+ scp->parentVnode = statusp->ParentVnode;
+ scp->parentUnique = statusp->ParentUnique;
- /* and merge in the private acl cache info, if this is more than the public
- * info; merge in the public stuff in any case.
+ /* and merge in the private acl cache info, if this is more than the public
+ * info; merge in the public stuff in any case.
+ */
+ scp->anyAccess = statusp->AnonymousAccess;
+
+ if (userp != NULL) {
+ cm_AddACLCache(scp, userp, statusp->CallerAccess);
+ }
+
+ if (scp->dataVersion != 0 &&
+ (!(flags & CM_MERGEFLAG_DIROP) && dataVersion != scp->dataVersion ||
+ (flags & CM_MERGEFLAG_DIROP) && dataVersion - scp->dataVersion > 1)) {
+ /*
+ * We now know that all of the data buffers that we have associated
+ * with this scp are invalid. Subsequent operations will go faster
+ * if the buffers are removed from the hash tables.
+ *
+ * We do not remove directory buffers if the dataVersion delta is 1 because
+ * those version numbers will be updated as part of the directory operation.
*/
- scp->anyAccess = statusp->AnonymousAccess;
+ int i, j;
+ cm_buf_t **lbpp;
+ cm_buf_t *tbp;
+ cm_buf_t *bp, *prevBp, *nextBp;
+
+ lock_ObtainWrite(&buf_globalLock);
+ i = BUF_FILEHASH(&scp->fid);
+ for (bp = cm_data.buf_fileHashTablepp[i]; bp; bp=nextBp)
+ {
+ nextBp = bp->fileHashp;
+ /*
+ * if the buffer belongs to this stat cache entry
+ * and the buffer mutex can be obtained, check the
+ * reference count and if it is zero, remove the buffer
+ * from the hash tables. If there are references,
+ * the buffer might be updated to the current version
+ * so leave it in place.
+ */
+ if (cm_FidCmp(&scp->fid, &bp->fid) == 0 &&
+ lock_TryMutex(&bp->mx)) {
+ if (bp->refCount == 0 &&
+ !(bp->flags & CM_BUF_READING | CM_BUF_WRITING | CM_BUF_DIRTY)) {
+ prevBp = bp->fileHashBackp;
+ bp->fileHashBackp = bp->fileHashp = NULL;
+ if (prevBp)
+ prevBp->fileHashp = nextBp;
+ else
+ cm_data.buf_fileHashTablepp[i] = nextBp;
+ if (nextBp)
+ nextBp->fileHashBackp = prevBp;
+
+ j = BUF_HASH(&bp->fid, &bp->offset);
+ lbpp = &(cm_data.buf_scacheHashTablepp[j]);
+ for(tbp = *lbpp; tbp; lbpp = &tbp->hashp, tbp = *lbpp) {
+ if (tbp == bp)
+ break;
+ }
+
+ *lbpp = bp->hashp; /* hash out */
+ bp->hashp = NULL;
+
+ bp->flags &= ~CM_BUF_INHASH;
+ }
+ lock_ReleaseMutex(&bp->mx);
+ }
+ }
+ lock_ReleaseWrite(&buf_globalLock);
+ }
- if (userp != NULL) {
- cm_AddACLCache(scp, userp, statusp->CallerAccess);
- }
+ /* We maintain a range of buffer dataVersion values which are considered
+ * valid. This avoids the need to update the dataVersion on each buffer
+ * object during an uncontested storeData operation. As a result this
+ * merge status no longer has performance characteristics derived from
+ * the size of the file.
+ */
+ if (((flags & CM_MERGEFLAG_STOREDATA) && dataVersion - scp->dataVersion > 1) ||
+ (!(flags & CM_MERGEFLAG_STOREDATA) && scp->dataVersion != dataVersion) ||
+ scp->bufDataVersionLow == 0)
+ scp->bufDataVersionLow = dataVersion;
+
+ scp->dataVersion = dataVersion;
}
/* note that our stat cache info is incorrect, so force us eventually
*/
void cm_DiscardSCache(cm_scache_t *scp)
{
- lock_AssertMutex(&scp->mx);
+ lock_AssertWrite(&scp->rw);
+ if (scp->cbServerp) {
+ cm_PutServer(scp->cbServerp);
scp->cbServerp = NULL;
- scp->cbExpires = 0;
- cm_dnlcPurgedp(scp);
- cm_FreeAllACLEnts(scp);
+ }
+ scp->cbExpires = 0;
+ scp->flags &= ~CM_SCACHEFLAG_CALLBACK;
+ cm_dnlcPurgedp(scp);
+ cm_dnlcPurgevp(scp);
+ cm_FreeAllACLEnts(scp);
+
+ if (scp->fileType == CM_SCACHETYPE_DFSLINK)
+ cm_VolStatus_Invalidate_DFS_Mapping(scp);
+
+ /* Force mount points and symlinks to be re-evaluated */
+ scp->mountPointStringp[0] = '\0';
}
void cm_AFSFidFromFid(AFSFid *afsFidp, cm_fid_t *fidp)
{
- afsFidp->Volume = fidp->volume;
- afsFidp->Vnode = fidp->vnode;
- afsFidp->Unique = fidp->unique;
+ afsFidp->Volume = fidp->volume;
+ afsFidp->Vnode = fidp->vnode;
+ afsFidp->Unique = fidp->unique;
+}
+
+#ifdef DEBUG_REFCOUNT
+void cm_HoldSCacheNoLockDbg(cm_scache_t *scp, char * file, long line)
+#else
+void cm_HoldSCacheNoLock(cm_scache_t *scp)
+#endif
+{
+ afs_int32 refCount;
+
+ osi_assertx(scp != NULL, "null cm_scache_t");
+ lock_AssertAny(&cm_scacheLock);
+ refCount = InterlockedIncrement(&scp->refCount);
+#ifdef DEBUG_REFCOUNT
+ osi_Log2(afsd_logp,"cm_HoldSCacheNoLock scp 0x%p ref %d",scp, refCount);
+ afsi_log("%s:%d cm_HoldSCacheNoLock scp 0x%p, ref %d", file, line, scp, refCount);
+#endif
}
+#ifdef DEBUG_REFCOUNT
+void cm_HoldSCacheDbg(cm_scache_t *scp, char * file, long line)
+#else
void cm_HoldSCache(cm_scache_t *scp)
+#endif
{
- lock_ObtainWrite(&cm_scacheLock);
- osi_assert(scp->refCount > 0);
- scp->refCount++;
- lock_ReleaseWrite(&cm_scacheLock);
+ afs_int32 refCount;
+
+ osi_assertx(scp != NULL, "null cm_scache_t");
+ lock_ObtainRead(&cm_scacheLock);
+ refCount = InterlockedIncrement(&scp->refCount);
+#ifdef DEBUG_REFCOUNT
+ osi_Log2(afsd_logp,"cm_HoldSCache scp 0x%p ref %d",scp, refCount);
+ afsi_log("%s:%d cm_HoldSCache scp 0x%p ref %d", file, line, scp, refCount);
+#endif
+ lock_ReleaseRead(&cm_scacheLock);
}
-void cm_ReleaseSCache(cm_scache_t *scp)
+#ifdef DEBUG_REFCOUNT
+void cm_ReleaseSCacheNoLockDbg(cm_scache_t *scp, char * file, long line)
+#else
+void cm_ReleaseSCacheNoLock(cm_scache_t *scp)
+#endif
{
- lock_ObtainWrite(&cm_scacheLock);
- osi_assert(scp->refCount-- > 0);
- lock_ReleaseWrite(&cm_scacheLock);
+ afs_int32 refCount;
+ osi_assertx(scp != NULL, "null cm_scache_t");
+ lock_AssertAny(&cm_scacheLock);
+ refCount = InterlockedDecrement(&scp->refCount);
+#ifdef DEBUG_REFCOUNT
+ if (refCount < 0)
+ osi_Log1(afsd_logp,"cm_ReleaseSCacheNoLock about to panic scp 0x%x",scp);
+#endif
+ osi_assertx(refCount >= 0, "cm_scache_t refCount 0");
+#ifdef DEBUG_REFCOUNT
+ osi_Log2(afsd_logp,"cm_ReleaseSCacheNoLock scp 0x%p ref %d",scp, refCount);
+ afsi_log("%s:%d cm_ReleaseSCacheNoLock scp 0x%p ref %d", file, line, scp, refCount);
+#endif
+}
+
+#ifdef DEBUG_REFCOUNT
+void cm_ReleaseSCacheDbg(cm_scache_t *scp, char * file, long line)
+#else
+void cm_ReleaseSCache(cm_scache_t *scp)
+#endif
+{
+ afs_int32 refCount;
+
+ osi_assertx(scp != NULL, "null cm_scache_t");
+ lock_ObtainRead(&cm_scacheLock);
+ refCount = InterlockedDecrement(&scp->refCount);
+#ifdef DEBUG_REFCOUNT
+ if (refCount < 0)
+ osi_Log1(afsd_logp,"cm_ReleaseSCache about to panic scp 0x%x",scp);
+#endif
+ osi_assertx(refCount >= 0, "cm_scache_t refCount 0");
+#ifdef DEBUG_REFCOUNT
+ osi_Log2(afsd_logp,"cm_ReleaseSCache scp 0x%p ref %d",scp, refCount);
+ afsi_log("%s:%d cm_ReleaseSCache scp 0x%p ref %d", file, line, scp, refCount);
+#endif
+ lock_ReleaseRead(&cm_scacheLock);
}
/* just look for the scp entry to get filetype */
/* doesn't need to be perfectly accurate, so locking doesn't matter too much */
int cm_FindFileType(cm_fid_t *fidp)
{
- long hash;
- cm_scache_t *scp;
+ long hash;
+ cm_scache_t *scp;
- hash = CM_SCACHE_HASH(fidp);
+ hash = CM_SCACHE_HASH(fidp);
- osi_assert(fidp->cell != 0);
+ osi_assertx(fidp->cell != 0, "unassigned cell value");
- lock_ObtainWrite(&cm_scacheLock);
- for(scp=cm_hashTablep[hash]; scp; scp=scp->nextp) {
- if (cm_FidCmp(fidp, &scp->fid) == 0) {
- /*scp->refCount++;*/
- /*cm_AdjustLRU(scp);*/
- lock_ReleaseWrite(&cm_scacheLock);
- return scp->fileType;
- }
+ lock_ObtainWrite(&cm_scacheLock);
+ for (scp=cm_data.scacheHashTablep[hash]; scp; scp=scp->nextp) {
+ if (cm_FidCmp(fidp, &scp->fid) == 0) {
+ lock_ReleaseWrite(&cm_scacheLock);
+ return scp->fileType;
}
- lock_ReleaseWrite(&cm_scacheLock);
- return 0;
+ }
+ lock_ReleaseWrite(&cm_scacheLock);
+ return 0;
}
/* dump all scp's that have reference count > 0 to a file.
* cookie is used to identify this batch for easy parsing,
* and it a string provided by a caller
*/
-int cm_DumpSCache(FILE *outputFile, char *cookie)
+int cm_DumpSCache(FILE *outputFile, char *cookie, int lock)
{
int zilch;
cm_scache_t *scp;
- char output[1024];
+ char output[2048];
int i;
- lock_ObtainRead(&cm_scacheLock);
+ if (lock)
+ lock_ObtainRead(&cm_scacheLock);
- sprintf(output, "%s - dumping scache - cm_currentSCaches=%d, cm_maxSCaches=%d\n", cookie, cm_currentSCaches, cm_maxSCaches);
- WriteFile(outputFile, output, strlen(output), &zilch, NULL);
+ sprintf(output, "%s - dumping all scache - cm_data.currentSCaches=%d, cm_data.maxSCaches=%d\r\n", cookie, cm_data.currentSCaches, cm_data.maxSCaches);
+ WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
- for (scp = cm_scacheLRULastp; scp; scp = (cm_scache_t *) osi_QPrev(&scp->q))
+ for (scp = cm_data.allSCachesp; scp; scp = scp->allNextp)
{
- if (scp->refCount != 0)
- {
- sprintf(output, "%s fid (cell=%d, volume=%d, vnode=%d, unique=%d) refCount=%d\n",
- cookie, scp->fid.cell, scp->fid.volume, scp->fid.vnode, scp->fid.unique,
- scp->refCount);
- WriteFile(outputFile, output, strlen(output), &zilch, NULL);
- }
+ sprintf(output, "%s scp=0x%p, fid (cell=%d, volume=%d, vnode=%d, unique=%d) volp=0x%p type=%d dv=%I64d len=0x%I64x mp='%s' flags=0x%x cb=0x%x refCount=%u\r\n",
+ cookie, scp, scp->fid.cell, scp->fid.volume, scp->fid.vnode, scp->fid.unique,
+ scp->volp, scp->fileType, scp->dataVersion, scp->length.QuadPart, scp->mountPointStringp, scp->flags,
+ (unsigned long)scp->cbExpires, scp->refCount);
+ WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
}
- sprintf(output, "%s - dumping cm_hashTable - cm_hashTableSize=%d\n", cookie, cm_hashTableSize);
- WriteFile(outputFile, output, strlen(output), &zilch, NULL);
+ sprintf(output, "%s - Done dumping all scache.\r\n", cookie);
+ WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
+ sprintf(output, "%s - dumping cm_data.scacheHashTable - cm_data.scacheHashTableSize=%d\r\n", cookie, cm_data.scacheHashTableSize);
+ WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
- for (i = 0; i < cm_hashTableSize; i++)
+ for (i = 0; i < cm_data.scacheHashTableSize; i++)
{
- for(scp = cm_hashTablep[i]; scp; scp=scp->nextp)
+ for(scp = cm_data.scacheHashTablep[i]; scp; scp=scp->nextp)
{
- if (scp)
- {
- if (scp->refCount)
- {
- sprintf(output, "%s scp=0x%08X, hash=%d, fid (cell=%d, volume=%d, vnode=%d, unique=%d) refCount=%d\n",
- cookie, (void *)scp, i, scp->fid.cell, scp->fid.volume, scp->fid.vnode,
- scp->fid.unique, scp->refCount);
- WriteFile(outputFile, output, strlen(output), &zilch, NULL);
- }
- }
+ sprintf(output, "%s scp=0x%p, hash=%d, fid (cell=%d, volume=%d, vnode=%d, unique=%d)\r\n",
+ cookie, scp, i, scp->fid.cell, scp->fid.volume, scp->fid.vnode, scp->fid.unique);
+ WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
}
}
- sprintf(output, "%s - Done dumping scache.\n", cookie);
- WriteFile(outputFile, output, strlen(output), &zilch, NULL);
+ sprintf(output, "%s - Done dumping cm_data.scacheHashTable\r\n", cookie);
+ WriteFile(outputFile, output, (DWORD)strlen(output), &zilch, NULL);
- lock_ReleaseRead(&cm_scacheLock);
+ if (lock)
+ lock_ReleaseRead(&cm_scacheLock);
return (0);
}
git://git.openafs.org / openafs.git / blobdiff