/*
* Copyright 2000, International Business Machines Corporation and others.
- * All Rights Reserved.
+ *$All Rights Reserved.
*
* This software has been released under the terms of the IBM Public
* License. For details, see the LICENSE file in the top-level source
* Implements:
*/
#include <afsconfig.h>
-#include "../afs/param.h"
+#include "afs/param.h"
-RCSID("$Header$");
+RCSID
+ ("$Header$");
-#include "../afs/sysincludes.h" /*Standard vendor system headers*/
-#include "../afs/afsincludes.h" /*AFS-based standard headers*/
-#include "../afs/afs_stats.h" /* statistics */
-#include "../afs/afs_cbqueue.h"
-#include "../afs/afs_osidnlc.h"
+#include "afs/sysincludes.h" /*Standard vendor system headers */
+#include "afsincludes.h" /*AFS-based standard headers */
+#include "afs/afs_stats.h" /* statistics */
+#include "afs/afs_cbqueue.h"
+#include "afs/afs_osidnlc.h"
/* Forward declarations. */
-static void afs_GetDownD(int anumber, int *aneedSpace);
+static void afs_GetDownD(int anumber, int *aneedSpace, afs_int32 buckethint);
static void afs_FreeDiscardedDCache(void);
static void afs_DiscardDCache(struct dcache *);
static void afs_FreeDCache(struct dcache *);
-
-/* Imported variables */
-extern afs_rwlock_t afs_xvcache;
-extern afs_rwlock_t afs_xcbhash;
-extern afs_int32 afs_mariner;
-extern afs_int32 cacheInfoModTime; /*Last time cache info modified*/
-
+/* For split cache */
+static afs_int32 afs_DCGetBucket(struct vcache *);
+static void afs_DCAdjustSize(struct dcache *, afs_int32, afs_int32);
+static void afs_DCMoveBucket(struct dcache *, afs_int32, afs_int32);
+static void afs_DCSizeInit(void);
+static afs_int32 afs_DCWhichBucket(afs_int32, afs_int32);
/*
* --------------------- Exported definitions ---------------------
*/
-afs_lock_t afs_xdcache; /*Lock: alloc new disk cache entries*/
-afs_int32 afs_freeDCList; /*Free list for disk cache entries*/
-afs_int32 afs_freeDCCount; /*Count of elts in freeDCList*/
-afs_int32 afs_discardDCList; /*Discarded disk cache entries*/
-afs_int32 afs_discardDCCount; /*Count of elts in discardDCList*/
-struct dcache *afs_freeDSList; /*Free list for disk slots */
-struct dcache *afs_Initial_freeDSList; /*Initial list for above*/
-ino_t cacheInode; /*Inode for CacheItems file*/
-struct osi_file *afs_cacheInodep = 0; /* file for CacheItems inode */
-struct afs_q afs_DLRU; /*dcache LRU*/
+/* For split cache */
+afs_int32 afs_blocksUsed_0; /*!< 1K blocks in cache - in theory is zero */
+afs_int32 afs_blocksUsed_1; /*!< 1K blocks in cache */
+afs_int32 afs_blocksUsed_2; /*!< 1K blocks in cache */
+afs_int32 afs_pct1 = -1;
+afs_int32 afs_pct2 = -1;
+afs_uint32 afs_tpct1 = 0;
+afs_uint32 afs_tpct2 = 0;
+afs_uint32 splitdcache = 0;
+
+afs_lock_t afs_xdcache; /*!< Lock: alloc new disk cache entries */
+afs_int32 afs_freeDCList; /*!< Free list for disk cache entries */
+afs_int32 afs_freeDCCount; /*!< Count of elts in freeDCList */
+afs_int32 afs_discardDCList; /*!< Discarded disk cache entries */
+afs_int32 afs_discardDCCount; /*!< Count of elts in discardDCList */
+struct dcache *afs_freeDSList; /*!< Free list for disk slots */
+struct dcache *afs_Initial_freeDSList; /*!< Initial list for above */
+#if defined(LINUX_USE_FH)
+struct fid cacheitems_fh;
+int cacheitems_fh_type;
+#else
+ino_t cacheInode; /*!< Inode for CacheItems file */
+#endif
+struct osi_file *afs_cacheInodep = 0; /*!< file for CacheItems inode */
+struct afs_q afs_DLRU; /*!< dcache LRU */
afs_int32 afs_dhashsize = 1024;
-afs_int32 *afs_dvhashTbl; /*Data cache hash table*/
-afs_int32 *afs_dchashTbl; /*Data cache hash table*/
-afs_int32 *afs_dvnextTbl; /*Dcache hash table links */
-afs_int32 *afs_dcnextTbl; /*Dcache hash table links */
-struct dcache **afs_indexTable; /*Pointers to dcache entries*/
-afs_hyper_t *afs_indexTimes; /*Dcache entry Access times*/
-afs_int32 *afs_indexUnique; /*dcache entry Fid.Unique */
-unsigned char *afs_indexFlags; /*(only one) Is there data there?*/
-afs_hyper_t afs_indexCounter; /*Fake time for marking index
- entries*/
-afs_int32 afs_cacheFiles =0; /*Size of afs_indexTable*/
-afs_int32 afs_cacheBlocks; /*1K blocks in cache*/
-afs_int32 afs_cacheStats; /*Stat entries in cache*/
-afs_int32 afs_blocksUsed; /*Number of blocks in use*/
-afs_int32 afs_blocksDiscarded; /*Blocks freed but not truncated */
-afs_int32 afs_fsfragsize = 1023; /*Underlying Filesystem minimum unit
+afs_int32 *afs_dvhashTbl; /*!< Data cache hash table: hashed by FID + chunk number. */
+afs_int32 *afs_dchashTbl; /*!< Data cache hash table: hashed by FID. */
+afs_int32 *afs_dvnextTbl; /*!< Dcache hash table links */
+afs_int32 *afs_dcnextTbl; /*!< Dcache hash table links */
+struct dcache **afs_indexTable; /*!< Pointers to dcache entries */
+afs_hyper_t *afs_indexTimes; /*!< Dcache entry Access times */
+afs_int32 *afs_indexUnique; /*!< dcache entry Fid.Unique */
+unsigned char *afs_indexFlags; /*!< (only one) Is there data there? */
+afs_hyper_t afs_indexCounter; /*!< Fake time for marking index
+ * entries */
+afs_int32 afs_cacheFiles = 0; /*!< Size of afs_indexTable */
+afs_int32 afs_cacheBlocks; /*!< 1K blocks in cache */
+afs_int32 afs_cacheStats; /*!< Stat entries in cache */
+afs_int32 afs_blocksUsed; /*!< Number of blocks in use */
+afs_int32 afs_blocksDiscarded; /*!<Blocks freed but not truncated */
+afs_int32 afs_fsfragsize = 1023; /*!< Underlying Filesystem minimum unit
*of disk allocation usually 1K
*this value is (truefrag -1 ) to
*save a bunch of subtracts... */
#ifdef AFS_64BIT_CLIENT
#ifdef AFS_VM_RDWR_ENV
-afs_size_t afs_vmMappingEnd; /* for large files (>= 2GB) the VM
- * mapping an 32bit addressing machines
- * can only be used below the 2 GB
- * line. From this point upwards we
- * must do direct I/O into the cache
- * files. The value should be on a
- * chunk boundary. */
+afs_size_t afs_vmMappingEnd; /* !< For large files (>= 2GB) the VM
+ * mapping an 32bit addressing machines
+ * can only be used below the 2 GB
+ * line. From this point upwards we
+ * must do direct I/O into the cache
+ * files. The value should be on a
+ * chunk boundary. */
#endif /* AFS_VM_RDWR_ENV */
#endif /* AFS_64BIT_CLIENT */
int afs_TruncateDaemonRunning = 0;
int afs_CacheTooFull = 0;
-afs_int32 afs_dcentries; /* In-memory dcache entries */
+afs_int32 afs_dcentries; /*!< In-memory dcache entries */
int dcacheDisabled = 0;
-extern struct dcache *afs_UFSGetDSlot();
-extern struct volume *afs_UFSGetVolSlot();
-extern int osi_UFSTruncate(), afs_osi_Read(), afs_osi_Write(), osi_UFSClose();
-extern int afs_UFSRead(), afs_UFSWrite();
-static int afs_UFSCacheFetchProc(), afs_UFSCacheStoreProc();
-extern int afs_UFSHandleLink();
+static int afs_UFSCacheFetchProc(struct rx_call *, struct osi_file *,
+ afs_size_t, struct dcache *,
+ struct vcache *, afs_size_t *,
+ afs_size_t *, afs_int32);
+
+static int afs_UFSCacheStoreProc(struct rx_call *, struct osi_file *,
+ afs_int32, struct vcache *,
+ int *, afs_size_t *,
+ afs_size_t *);
+
struct afs_cacheOps afs_UfsCacheOps = {
+#if defined(LINUX_USE_FH)
+ osi_UFSOpen_fh,
+#else
osi_UFSOpen,
+#endif
osi_UFSTruncate,
afs_osi_Read,
afs_osi_Write,
afs_UFSHandleLink,
};
-extern void *afs_MemCacheOpen();
-extern struct dcache *afs_MemGetDSlot();
-extern struct volume *afs_MemGetVolSlot();
-extern int afs_MemCacheTruncate(), afs_MemReadBlk(), afs_MemWriteBlk(), afs_MemCacheClose();
-extern int afs_MemRead(), afs_MemWrite(), afs_MemCacheFetchProc(), afs_MemCacheStoreProc();
-extern int afs_MemHandleLink();
struct afs_cacheOps afs_MemCacheOps = {
afs_MemCacheOpen,
afs_MemCacheTruncate,
afs_MemHandleLink,
};
-int cacheDiskType; /*Type of backing disk for cache*/
+int cacheDiskType; /*Type of backing disk for cache */
struct afs_cacheOps *afs_cacheType;
+/*!
+ * Where is this vcache's entry associated dcache located/
+ * \param avc The vcache entry.
+ * \return Bucket index:
+ * 1 : main
+ * 2 : RO
+ */
+static afs_int32
+afs_DCGetBucket(struct vcache *avc)
+{
+ if (!splitdcache)
+ return 1;
+
+ /* This should be replaced with some sort of user configurable function */
+ if (avc->states & CRO) {
+ return 2;
+ } else if (avc->states & CBackup) {
+ return 1;
+ } else {
+ /* RW */
+ }
+ /* main bucket */
+ return 1;
+}
+
+/*!
+ * Readjust a dcache's size.
+ *
+ * \param adc The dcache to be adjusted.
+ * \param oldSize Old size for the dcache.
+ * \param newSize The new size to be adjusted to.
+ *
+ */
+static void
+afs_DCAdjustSize(struct dcache *adc, afs_int32 oldSize, afs_int32 newSize)
+{
+ afs_int32 adjustSize = newSize - oldSize;
+
+ if (!splitdcache)
+ return;
+ switch (adc->bucket)
+ {
+ case 0:
+ afs_blocksUsed_0 += adjustSize;
+ afs_stats_cmperf.cacheBucket0_Discarded += oldSize;
+ break;
+ case 1:
+ afs_blocksUsed_1 += adjustSize;
+ afs_stats_cmperf.cacheBucket1_Discarded += oldSize;
+ break;
+ case 2:
+ afs_blocksUsed_2 += adjustSize;
+ afs_stats_cmperf.cacheBucket2_Discarded += oldSize;
+ break;
+ }
+ return;
+}
-/*
- * afs_StoreWarn
+/*!
+ * Move a dcache from one bucket to another.
+ *
+ * \param adc Operate on this dcache.
+ * \param size Size in bucket (?).
+ * \param newBucket Destination bucket.
*
- * Description:
- * Warn about failing to store a file.
+ */
+static void
+afs_DCMoveBucket(struct dcache *adc, afs_int32 size, afs_int32 newBucket)
+{
+ if (!splitdcache)
+ return;
+
+ /* Substract size from old bucket. */
+ switch (adc->bucket)
+ {
+ case 0:
+ afs_blocksUsed_0 -= size;
+ break;
+ case 1:
+ afs_blocksUsed_1 -= size;
+ break;
+ case 2:
+ afs_blocksUsed_2 -= size;
+ break;
+ }
+
+ /* Set new bucket and increase destination bucket size. */
+ adc->bucket = newBucket;
+
+ switch (adc->bucket)
+ {
+ case 0:
+ afs_blocksUsed_0 += size;
+ break;
+ case 1:
+ afs_blocksUsed_1 += size;
+ break;
+ case 2:
+ afs_blocksUsed_2 += size;
+ break;
+ }
+
+ return;
+}
+
+/*!
+ * Init split caches size.
+ */
+static void
+afs_DCSizeInit(void)
+{
+ afs_blocksUsed_0 = afs_blocksUsed_1 = afs_blocksUsed_2 = 0;
+}
+
+
+/*!
+ * \param phase
+ * \param bucket
+ */
+static afs_int32
+afs_DCWhichBucket(afs_int32 phase, afs_int32 bucket)
+{
+ if (!splitdcache)
+ return 0;
+
+ afs_pct1 = afs_blocksUsed_1 / (afs_cacheBlocks / 100);
+ afs_pct2 = afs_blocksUsed_2 / (afs_cacheBlocks / 100);
+
+ /* Short cut: if we don't know about it, try to kill it */
+ if (phase < 2 && afs_blocksUsed_0)
+ return 0;
+
+ if (afs_pct1 > afs_tpct1)
+ return 1;
+ if (afs_pct2 > afs_tpct2)
+ return 2;
+ return 0; /* unlikely */
+}
+
+
+/*!
+ * Warn about failing to store a file.
*
- * Parameters:
- * acode : Associated error code.
- * avolume : Volume involved.
- * aflags : How to handle the output:
- * aflags & 1: Print out on console
- * aflags & 2: Print out on controlling tty
+ * \param acode Associated error code.
+ * \param avolume Volume involved.
+ * \param aflags How to handle the output:
+ * aflags & 1: Print out on console
+ * aflags & 2: Print out on controlling tty
*
- * Environment:
- * Call this from close call when vnodeops is RCS unlocked.
+ * \note Environment: Call this from close call when vnodeops is RCS unlocked.
*/
void
-afs_StoreWarn(acode, avolume, aflags)
- register afs_int32 acode;
- afs_int32 avolume;
- register afs_int32 aflags;
-
-{ /*afs_StoreWarn*/
-
+afs_StoreWarn(register afs_int32 acode, afs_int32 avolume,
+ register afs_int32 aflags)
+{
static char problem_fmt[] =
"afs: failed to store file in volume %d (%s)\n";
static char problem_fmt_w_error[] =
"afs: failed to store file in volume %d (error %d)\n";
static char netproblems[] = "network problems";
- static char partfull[] = "partition full";
- static char overquota[] = "over quota";
- static char unknownerr[] = "unknown error";
+ static char partfull[] = "partition full";
+ static char overquota[] = "over quota";
AFS_STATCNT(afs_StoreWarn);
if (acode < 0) {
- /*
+ /*
* Network problems
*/
- if (aflags & 1)
+ if (aflags & 1)
afs_warn(problem_fmt, avolume, netproblems);
- if (aflags & 2)
+ if (aflags & 2)
afs_warnuser(problem_fmt, avolume, netproblems);
- }
- else
- if (acode == ENOSPC) {
- /*
- * Partition full
- */
- if (aflags & 1)
- afs_warn(problem_fmt, avolume, partfull);
- if (aflags & 2)
- afs_warnuser(problem_fmt, avolume, partfull);
- }
- else
-#ifndef AFS_SUN5_ENV
- /* EDQUOT doesn't exist on solaris and won't be sent by the server.
- * Instead ENOSPC will be sent...
- */
- if (acode == EDQUOT) {
- /*
- * Quota exceeded
- */
- if (aflags & 1)
- afs_warn(problem_fmt, avolume, overquota);
- if (aflags & 2)
- afs_warnuser(problem_fmt, avolume, overquota);
- } else
+ } else if (acode == ENOSPC) {
+ /*
+ * Partition full
+ */
+ if (aflags & 1)
+ afs_warn(problem_fmt, avolume, partfull);
+ if (aflags & 2)
+ afs_warnuser(problem_fmt, avolume, partfull);
+ } else
+#ifdef EDQUOT
+ /* EDQUOT doesn't exist on solaris and won't be sent by the server.
+ * Instead ENOSPC will be sent...
+ */
+ if (acode == EDQUOT) {
+ /*
+ * Quota exceeded
+ */
+ if (aflags & 1)
+ afs_warn(problem_fmt, avolume, overquota);
+ if (aflags & 2)
+ afs_warnuser(problem_fmt, avolume, overquota);
+ } else
#endif
- {
- /*
- * Unknown error
- */
- if (aflags & 1)
- afs_warn(problem_fmt_w_error, avolume, acode);
- if (aflags & 2)
- afs_warnuser(problem_fmt_w_error, avolume, acode);
- }
-} /*afs_StoreWarn*/
+ {
+ /*
+ * Unknown error
+ */
+ if (aflags & 1)
+ afs_warn(problem_fmt_w_error, avolume, acode);
+ if (aflags & 2)
+ afs_warnuser(problem_fmt_w_error, avolume, acode);
+ }
+} /*afs_StoreWarn */
-void afs_MaybeWakeupTruncateDaemon() {
+/*!
+ * Try waking up truncation daemon, if it's worth it.
+ */
+void
+afs_MaybeWakeupTruncateDaemon(void)
+{
if (!afs_CacheTooFull && afs_CacheIsTooFull()) {
afs_CacheTooFull = 1;
if (!afs_TruncateDaemonRunning)
- afs_osi_Wakeup((char *)afs_CacheTruncateDaemon);
- } else if (!afs_TruncateDaemonRunning &&
- afs_blocksDiscarded > CM_MAXDISCARDEDCHUNKS) {
- afs_osi_Wakeup((char *)afs_CacheTruncateDaemon);
+ afs_osi_Wakeup((int *)afs_CacheTruncateDaemon);
+ } else if (!afs_TruncateDaemonRunning
+ && afs_blocksDiscarded > CM_MAXDISCARDEDCHUNKS) {
+ afs_osi_Wakeup((int *)afs_CacheTruncateDaemon);
}
}
-/* Keep statistics on run time for afs_CacheTruncateDaemon. This is a
+/*!
+ * /struct CTD_stats
+ *
+ * Keep statistics on run time for afs_CacheTruncateDaemon. This is a
* struct so we need only export one symbol for AIX.
*/
-struct CTD_stats {
+static struct CTD_stats {
osi_timeval_t CTD_beforeSleep;
osi_timeval_t CTD_afterSleep;
osi_timeval_t CTD_sleepTime;
} CTD_stats;
u_int afs_min_cache = 0;
-void afs_CacheTruncateDaemon() {
+
+/*!
+ * Keeps the cache clean and free by truncating uneeded files, when used.
+ * \param
+ * \return
+ */
+void
+afs_CacheTruncateDaemon(void)
+{
osi_timeval_t CTD_tmpTime;
u_int counter;
u_int cb_lowat;
- u_int dc_hiwat = (100-CM_DCACHECOUNTFREEPCT+CM_DCACHEEXTRAPCT)*afs_cacheFiles/100;
- afs_min_cache = (((10 * AFS_CHUNKSIZE(0)) + afs_fsfragsize) & ~afs_fsfragsize)>>10;
+ u_int dc_hiwat =
+ PERCENT((100 - CM_DCACHECOUNTFREEPCT + CM_DCACHEEXTRAPCT), afs_cacheFiles);
+ afs_min_cache =
+ (((10 * AFS_CHUNKSIZE(0)) + afs_fsfragsize) & ~afs_fsfragsize) >> 10;
osi_GetuTime(&CTD_stats.CTD_afterSleep);
afs_TruncateDaemonRunning = 1;
while (1) {
- cb_lowat = ((CM_DCACHESPACEFREEPCT-CM_DCACHEEXTRAPCT)
- * afs_cacheBlocks) / 100;
- MObtainWriteLock(&afs_xdcache,266);
+ cb_lowat = PERCENT((CM_DCACHESPACEFREEPCT - CM_DCACHEEXTRAPCT), afs_cacheBlocks);
+ MObtainWriteLock(&afs_xdcache, 266);
if (afs_CacheTooFull) {
- int space_needed, slots_needed;
+ int space_needed, slots_needed;
/* if we get woken up, we should try to clean something out */
for (counter = 0; counter < 10; counter++) {
- space_needed = afs_blocksUsed - afs_blocksDiscarded - cb_lowat;
- slots_needed = dc_hiwat - afs_freeDCCount - afs_discardDCCount;
- afs_GetDownD(slots_needed, &space_needed);
+ space_needed =
+ afs_blocksUsed - afs_blocksDiscarded - cb_lowat;
+ slots_needed =
+ dc_hiwat - afs_freeDCCount - afs_discardDCCount;
+ afs_GetDownD(slots_needed, &space_needed, 0);
if ((space_needed <= 0) && (slots_needed <= 0)) {
break;
}
}
if (!afs_CacheIsTooFull())
afs_CacheTooFull = 0;
- }
+ } /* end of cache cleanup */
MReleaseWriteLock(&afs_xdcache);
/*
* any cache files then give up the global lock so other
* threads get a chance to run.
*/
- if ((afs_termState!=AFSOP_STOP_TRUNCDAEMON) && afs_CacheTooFull &&
- (!afs_blocksDiscarded || afs_WaitForCacheDrain)) {
- afs_osi_Wait(100, 0, 0); /* 100 milliseconds */
+ if ((afs_termState != AFSOP_STOP_TRUNCDAEMON) && afs_CacheTooFull
+ && (!afs_blocksDiscarded || afs_WaitForCacheDrain)) {
+ afs_osi_Wait(100, 0, 0); /* 100 milliseconds */
}
/*
* This is where we free the discarded cache elements.
*/
- while(afs_blocksDiscarded && !afs_WaitForCacheDrain &&
- (afs_termState!=AFSOP_STOP_TRUNCDAEMON))
- {
+ while (afs_blocksDiscarded && !afs_WaitForCacheDrain
+ && (afs_termState != AFSOP_STOP_TRUNCDAEMON)) {
afs_FreeDiscardedDCache();
}
/* See if we need to continue to run. Someone may have
* signalled us while we were executing.
*/
- if (!afs_WaitForCacheDrain && !afs_CacheTooFull &&
- (afs_termState!=AFSOP_STOP_TRUNCDAEMON))
- {
+ if (!afs_WaitForCacheDrain && !afs_CacheTooFull
+ && (afs_termState != AFSOP_STOP_TRUNCDAEMON)) {
/* Collect statistics on truncate daemon. */
CTD_stats.CTD_nSleeps++;
osi_GetuTime(&CTD_stats.CTD_beforeSleep);
afs_stats_AddTo(CTD_stats.CTD_runTime, CTD_tmpTime);
afs_TruncateDaemonRunning = 0;
- afs_osi_Sleep((char *)afs_CacheTruncateDaemon);
+ afs_osi_Sleep((int *)afs_CacheTruncateDaemon);
afs_TruncateDaemonRunning = 1;
osi_GetuTime(&CTD_stats.CTD_afterSleep);
}
-/*
- * afs_AdjustSize
- *
- * Description:
- * Make adjustment for the new size in the disk cache entry
+/*!
+ * Make adjustment for the new size in the disk cache entry
*
- * Major Assumptions Here:
+ * \note Major Assumptions Here:
* Assumes that frag size is an integral power of two, less one,
* and that this is a two's complement machine. I don't
* know of any filesystems which violate this assumption...
*
- * Parameters:
- * adc : Ptr to dcache entry.
- * anewsize : New size desired.
+ * \param adc Ptr to dcache entry.
+ * \param anewsize New size desired.
+ *
*/
void
-afs_AdjustSize(adc, newSize)
- register struct dcache *adc;
- register afs_int32 newSize;
-
-{ /*afs_AdjustSize*/
-
+afs_AdjustSize(register struct dcache *adc, register afs_int32 newSize)
+{
register afs_int32 oldSize;
AFS_STATCNT(afs_AdjustSize);
adc->dflags |= DFEntryMod;
- oldSize = ((adc->f.chunkBytes + afs_fsfragsize)^afs_fsfragsize)>>10;/* round up */
+ oldSize = ((adc->f.chunkBytes + afs_fsfragsize) ^ afs_fsfragsize) >> 10; /* round up */
adc->f.chunkBytes = newSize;
- newSize = ((newSize + afs_fsfragsize)^afs_fsfragsize)>>10;/* round up */
- if (newSize > oldSize) {
+ if (!newSize)
+ adc->validPos = 0;
+ newSize = ((newSize + afs_fsfragsize) ^ afs_fsfragsize) >> 10; /* round up */
+ afs_DCAdjustSize(adc, oldSize, newSize);
+ if ((newSize > oldSize) && !AFS_IS_DISCONNECTED) {
+
/* We're growing the file, wakeup the daemon */
afs_MaybeWakeupTruncateDaemon();
}
afs_blocksUsed += (newSize - oldSize);
afs_stats_cmperf.cacheBlocksInUse = afs_blocksUsed; /* XXX */
-
-} /*afs_AdjustSize*/
-
-
-
+}
-/*
- * afs_GetDownD
- *
- * Description:
- * This routine is responsible for moving at least one entry (but up
- * to some number of them) from the LRU queue to the free queue.
+/*!
+ * This routine is responsible for moving at least one entry (but up
+ * to some number of them) from the LRU queue to the free queue.
*
- * Parameters:
- * anumber : Number of entries that should ideally be moved.
- * aneedSpace : How much space we need (1K blocks);
+ * \param anumber Number of entries that should ideally be moved.
+ * \param aneedSpace How much space we need (1K blocks);
*
- * Environment:
+ * \note Environment:
* The anumber parameter is just a hint; at least one entry MUST be
* moved, or we'll panic. We must be called with afs_xdcache
* write-locked. We should try to satisfy both anumber and aneedspace,
* the whole set of MAXATONCE.
* 2. dynamically choose MAXATONCE to reflect severity of
* demand: something like (*aneedSpace >> (logChunk - 9))
- * N.B. if we're called with aneedSpace <= 0 and anumber > 0, that
+ *
+ * \note N.B. if we're called with aneedSpace <= 0 and anumber > 0, that
* indicates that the cache is not properly configured/tuned or
* something. We should be able to automatically correct that problem.
*/
#define MAXATONCE 16 /* max we can obtain at once */
-static void afs_GetDownD(int anumber, int *aneedSpace)
+static void
+afs_GetDownD(int anumber, int *aneedSpace, afs_int32 buckethint)
{
struct dcache *tdc;
struct VenusFid *afid;
- afs_int32 i, j, k;
+ afs_int32 i, j;
afs_hyper_t vtime;
int skip, phase;
register struct vcache *tvc;
afs_uint32 victims[MAXATONCE];
struct dcache *victimDCs[MAXATONCE];
- afs_hyper_t victimTimes[MAXATONCE];/* youngest (largest LRU time) first */
- afs_uint32 victimPtr; /* next free item in victim arrays */
- afs_hyper_t maxVictimTime; /* youngest (largest LRU time) victim */
- afs_uint32 maxVictimPtr; /* where it is */
+ afs_hyper_t victimTimes[MAXATONCE]; /* youngest (largest LRU time) first */
+ afs_uint32 victimPtr; /* next free item in victim arrays */
+ afs_hyper_t maxVictimTime; /* youngest (largest LRU time) victim */
+ afs_uint32 maxVictimPtr; /* where it is */
int discard;
+ int curbucket;
+ int vfslocked;
+
+#if defined(AFS_FBSD80_ENV) && !defined(UKERNEL)
+ vfslocked = VFS_LOCK_GIANT(afs_globalVFS);
+#endif
AFS_STATCNT(afs_GetDownD);
+
if (CheckLock(&afs_xdcache) != -1)
osi_Panic("getdownd nolock");
/* decrement anumber first for all dudes in free list */
* because we should try to free space even if anumber <=0 */
if (!aneedSpace || *aneedSpace <= 0) {
anumber -= afs_freeDCCount;
- if (anumber <= 0) return; /* enough already free */
+ if (anumber <= 0) {
+#if defined(AFS_FBSD80_ENV) && !defined(UKERNEL)
+ VFS_UNLOCK_GIANT(vfslocked);
+#endif
+ return; /* enough already free */
+ }
}
+
/* bounds check parameter */
- if (anumber > MAXATONCE)
- anumber = MAXATONCE; /* all we can do */
+ if (anumber > MAXATONCE)
+ anumber = MAXATONCE; /* all we can do */
+ /* rewrite so phases include a better eligiblity for gc test*/
/*
* The phase variable manages reclaims. Set to 0, the first pass,
- * we don't reclaim active entries. Set to 1, we reclaim even active
- * ones.
+ * we don't reclaim active entries, or other than target bucket.
+ * Set to 1, we reclaim even active ones in target bucket.
+ * Set to 2, we reclaim any inactive one.
+ * Set to 3, we reclaim even active ones.
*/
- phase = 0;
+ if (splitdcache) {
+ phase = 0;
+ } else {
+ phase = 4;
+ }
+
for (i = 0; i < afs_cacheFiles; i++)
/* turn off all flags */
afs_indexFlags[i] &= ~IFFlag;
- while (anumber > 0 || (aneedSpace && *aneedSpace >0)) {
+ while (anumber > 0 || (aneedSpace && *aneedSpace > 0)) {
/* find oldest entries for reclamation */
maxVictimPtr = victimPtr = 0;
hzero(maxVictimTime);
+ curbucket = afs_DCWhichBucket(phase, buckethint);
/* select victims from access time array */
for (i = 0; i < afs_cacheFiles; i++) {
if (afs_indexFlags[i] & (IFDataMod | IFFree | IFDiscarded)) {
- /* skip if dirty or already free */
- continue;
+ /* skip if dirty or already free */
+ continue;
}
tdc = afs_indexTable[i];
+ if (tdc && (curbucket != tdc->bucket) && (phase < 4))
+ {
+ /* Wrong bucket; can't use it! */
+ continue;
+ }
if (tdc && (tdc->refCount != 0)) {
- /* Referenced; can't use it! */
- continue;
+ /* Referenced; can't use it! */
+ continue;
}
hset(vtime, afs_indexTimes[i]);
/* if we've already looked at this one, skip it */
- if (afs_indexFlags[i] & IFFlag) continue;
+ if (afs_indexFlags[i] & IFFlag)
+ continue;
if (victimPtr < MAXATONCE) {
/* if there's at least one free victim slot left */
maxVictimPtr = victimPtr;
}
victimPtr++;
- }
- else if (hcmp(vtime, maxVictimTime) < 0) {
+ } else if (hcmp(vtime, maxVictimTime) < 0) {
/*
* We're older than youngest victim, so we replace at
* least one victim
*/
/* find youngest (largest LRU) victim */
- j = maxVictimPtr;
- if (j == victimPtr) osi_Panic("getdownd local");
+ j = maxVictimPtr;
+ if (j == victimPtr)
+ osi_Panic("getdownd local");
victims[j] = i;
hset(victimTimes[j], vtime);
/* recompute maxVictimTime */
hset(maxVictimTime, vtime);
- for(j = 0; j < victimPtr; j++)
+ for (j = 0; j < victimPtr; j++)
if (hcmp(maxVictimTime, victimTimes[j]) < 0) {
hset(maxVictimTime, victimTimes[j]);
maxVictimPtr = j;
}
}
- } /* big for loop */
+ } /* big for loop */
/* now really reclaim the victims */
- j = 0; /* flag to track if we actually got any of the victims */
+ j = 0; /* flag to track if we actually got any of the victims */
/* first, hold all the victims, since we're going to release the lock
* during the truncate operation.
*/
- for(i=0; i < victimPtr; i++) {
+ for (i = 0; i < victimPtr; i++) {
tdc = afs_GetDSlot(victims[i], 0);
/* We got tdc->tlock(R) here */
if (tdc->refCount == 1)
else
victimDCs[i] = 0;
ReleaseReadLock(&tdc->tlock);
- if (!victimDCs[i]) afs_PutDCache(tdc);
+ if (!victimDCs[i])
+ afs_PutDCache(tdc);
}
- for(i = 0; i < victimPtr; i++) {
+ for (i = 0; i < victimPtr; i++) {
/* q is first elt in dcache entry */
tdc = victimDCs[i];
/* now, since we're dropping the afs_xdcache lock below, we
*/
if (tdc && tdc->refCount == 1) {
unsigned char chunkFlags;
- afs_size_t tchunkoffset;
- afid = &tdc->f.fid;
+ afs_size_t tchunkoffset = 0;
+ afid = &tdc->f.fid;
/* xdcache is lower than the xvcache lock */
MReleaseWriteLock(&afs_xdcache);
MObtainReadLock(&afs_xvcache);
- tvc = afs_FindVCache(afid, 0,0, 0, 0 /* no stats, no vlru */ );
+ tvc = afs_FindVCache(afid, 0, 0 /* no stats, no vlru */ );
MReleaseReadLock(&afs_xvcache);
MObtainWriteLock(&afs_xdcache, 527);
skip = 0;
- if (tdc->refCount > 1) skip = 1;
+ if (tdc->refCount > 1)
+ skip = 1;
if (tvc) {
tchunkoffset = AFS_CHUNKTOBASE(tdc->f.chunk);
chunkFlags = afs_indexFlags[tdc->index];
- if (phase == 0 && osi_Active(tvc)) skip = 1;
- if (phase > 0 && osi_Active(tvc) && (tvc->states & CDCLock)
- && (chunkFlags & IFAnyPages)) skip = 1;
- if (chunkFlags & IFDataMod) skip = 1;
+ if (((phase & 1) == 0) && osi_Active(tvc))
+ skip = 1;
+ if (((phase & 1) == 1) && osi_Active(tvc)
+ && (tvc->states & CDCLock)
+ && (chunkFlags & IFAnyPages))
+ skip = 1;
+ if (chunkFlags & IFDataMod)
+ skip = 1;
afs_Trace4(afs_iclSetp, CM_TRACE_GETDOWND,
ICL_TYPE_POINTER, tvc, ICL_TYPE_INT32, skip,
- ICL_TYPE_INT32, tdc->index,
- ICL_TYPE_OFFSET,
+ ICL_TYPE_INT32, tdc->index, ICL_TYPE_OFFSET,
ICL_HANDLE_OFFSET(tchunkoffset));
#if defined(AFS_SUN5_ENV)
/* One last recheck */
MObtainWriteLock(&afs_xdcache, 333);
chunkFlags = afs_indexFlags[tdc->index];
- if (tdc->refCount > 1
- || (chunkFlags & IFDataMod)
+ if (tdc->refCount > 1 || (chunkFlags & IFDataMod)
|| (osi_Active(tvc) && (tvc->states & CDCLock)
- && (chunkFlags & IFAnyPages))) {
+ && (chunkFlags & IFAnyPages))) {
skip = 1;
MReleaseWriteLock(&afs_xdcache);
goto endputpage;
code = osi_VM_GetDownD(tvc, tdc);
- MObtainWriteLock(&afs_xdcache,269);
+ MObtainWriteLock(&afs_xdcache, 269);
/* we actually removed all pages, clean and dirty */
if (code == 0) {
- afs_indexFlags[tdc->index] &= ~(IFDirtyPages| IFAnyPages);
+ afs_indexFlags[tdc->index] &=
+ ~(IFDirtyPages | IFAnyPages);
} else
skip = 1;
MReleaseWriteLock(&afs_xdcache);
-endputpage:
+ endputpage:
MObtainWriteLock(&tvc->vlock, 544);
- if (--tvc->activeV == 0 && (tvc->vstates & VRevokeWait)) {
+ if (--tvc->activeV == 0
+ && (tvc->vstates & VRevokeWait)) {
tvc->vstates &= ~VRevokeWait;
afs_osi_Wakeup((char *)&tvc->vstates);
tvc->vstates &= ~VPageCleaning;
afs_osi_Wakeup((char *)&tvc->vstates);
}
-endmultipage:
+ endmultipage:
MReleaseWriteLock(&tvc->vlock);
} else
-#endif /* AFS_SUN5_ENV */
+#endif /* AFS_SUN5_ENV */
{
MReleaseWriteLock(&afs_xdcache);
}
- AFS_FAST_RELE(tvc);
+ afs_PutVCache(tvc); /*XXX was AFS_FAST_RELE?*/
MObtainWriteLock(&afs_xdcache, 528);
if (afs_indexFlags[tdc->index] &
- (IFDataMod | IFDirtyPages | IFAnyPages)) skip = 1;
- if (tdc->refCount > 1) skip = 1;
+ (IFDataMod | IFDirtyPages | IFAnyPages))
+ skip = 1;
+ if (tdc->refCount > 1)
+ skip = 1;
}
#if defined(AFS_SUN5_ENV)
else {
* Hold vcache lock to prevent vnode from being
* created while we're clearing IFDirtyPages.
*/
- afs_indexFlags[tdc->index] &= ~(IFDirtyPages | IFAnyPages);
+ afs_indexFlags[tdc->index] &=
+ ~(IFDirtyPages | IFAnyPages);
}
#endif
if (skip) {
afs_indexFlags[tdc->index] |= IFFlag;
afs_Trace4(afs_iclSetp, CM_TRACE_GETDOWND,
ICL_TYPE_POINTER, tvc, ICL_TYPE_INT32, 2,
- ICL_TYPE_INT32, tdc->index,
- ICL_TYPE_OFFSET,
+ ICL_TYPE_INT32, tdc->index, ICL_TYPE_OFFSET,
ICL_HANDLE_OFFSET(tchunkoffset));
- }
- else {
+ } else {
/* flush this dude from the data cache and reclaim;
- * first, make sure no one will care that we damage
- * it, by removing it from all hash tables. Then,
- * melt it down for parts. Note that any concurrent
- * (new possibility!) calls to GetDownD won't touch
- * this guy because his reference count is > 0. */
+ * first, make sure no one will care that we damage
+ * it, by removing it from all hash tables. Then,
+ * melt it down for parts. Note that any concurrent
+ * (new possibility!) calls to GetDownD won't touch
+ * this guy because his reference count is > 0. */
afs_Trace4(afs_iclSetp, CM_TRACE_GETDOWND,
ICL_TYPE_POINTER, tvc, ICL_TYPE_INT32, 3,
- ICL_TYPE_INT32, tdc->index,
- ICL_TYPE_OFFSET,
+ ICL_TYPE_INT32, tdc->index, ICL_TYPE_OFFSET,
ICL_HANDLE_OFFSET(tchunkoffset));
-#ifndef AFS_DEC_ENV
AFS_STATCNT(afs_gget);
-#endif
- afs_HashOutDCache(tdc);
+ afs_HashOutDCache(tdc, 1);
if (tdc->f.chunkBytes != 0) {
discard = 1;
if (aneedSpace)
- *aneedSpace -= (tdc->f.chunkBytes + afs_fsfragsize) >> 10;
+ *aneedSpace -=
+ (tdc->f.chunkBytes + afs_fsfragsize) >> 10;
} else {
discard = 0;
}
}
}
afs_PutDCache(tdc);
- }
-
- if (phase == 0) {
+ } /* end of for victims loop */
+
+ if (phase < 5) {
/* Phase is 0 and no one was found, so try phase 1 (ignore
* osi_Active flag) */
if (j == 0) {
- phase = 1;
+ phase++;
for (i = 0; i < afs_cacheFiles; i++)
/* turn off all flags */
afs_indexFlags[i] &= ~IFFlag;
}
+ } else {
+ /* found no one in phases 0-5, we're hosed */
+ if (victimPtr == 0)
+ break;
}
- else {
- /* found no one in phase 1, we're hosed */
- if (victimPtr == 0) break;
- }
- } /* big while loop */
+ } /* big while loop */
+
+#if defined(AFS_FBSD80_ENV) && !defined(UKERNEL)
+ VFS_UNLOCK_GIANT(vfslocked);
+#endif
+
return;
-} /*afs_GetDownD*/
+} /*afs_GetDownD */
-/*
- * Description: remove adc from any hash tables that would allow it to be located
+/*!
+ * Remove adc from any hash tables that would allow it to be located
* again by afs_FindDCache or afs_GetDCache.
*
- * Parameters: adc -- pointer to dcache entry to remove from hash tables.
+ * \param adc Pointer to dcache entry to remove from hash tables.
+ *
+ * \note Locks: Must have the afs_xdcache lock write-locked to call this function.
*
- * Locks: Must have the afs_xdcache lock write-locked to call this function.
*/
-afs_HashOutDCache(adc)
- struct dcache *adc;
-
-{ /*afs_HashOutDCache*/
-
+int
+afs_HashOutDCache(struct dcache *adc, int zap)
+{
int i, us;
-#ifndef AFS_DEC_ENV
AFS_STATCNT(afs_glink);
-#endif
- /* we know this guy's in the LRUQ. We'll move dude into DCQ below */
- DZap(&adc->f.inode);
+ if (zap)
+ /* we know this guy's in the LRUQ. We'll move dude into DCQ below */
+ DZap(adc);
/* if this guy is in the hash table, pull him out */
if (adc->f.fid.Fid.Volume != 0) {
/* remove entry from first hash chains */
if (us == adc->index) {
/* first dude in the list */
afs_dchashTbl[i] = afs_dcnextTbl[adc->index];
- }
- else {
+ } else {
/* somewhere on the chain */
while (us != NULLIDX) {
if (afs_dcnextTbl[us] == adc->index) {
}
us = afs_dcnextTbl[us];
}
- if (us == NULLIDX) osi_Panic("dcache hc");
+ if (us == NULLIDX)
+ osi_Panic("dcache hc");
}
/* remove entry from *other* hash chain */
i = DVHash(&adc->f.fid);
if (us == adc->index) {
/* first dude in the list */
afs_dvhashTbl[i] = afs_dvnextTbl[adc->index];
- }
- else {
+ } else {
/* somewhere on the chain */
while (us != NULLIDX) {
if (afs_dvnextTbl[us] == adc->index) {
}
us = afs_dvnextTbl[us];
}
- if (us == NULLIDX) osi_Panic("dcache hv");
+ if (us == NULLIDX)
+ osi_Panic("dcache hv");
}
}
- /* prevent entry from being found on a reboot (it is already out of
- * the hash table, but after a crash, we just look at fid fields of
- * stable (old) entries).
- */
- adc->f.fid.Fid.Volume = 0; /* invalid */
+ if (zap) {
+ /* prevent entry from being found on a reboot (it is already out of
+ * the hash table, but after a crash, we just look at fid fields of
+ * stable (old) entries).
+ */
+ adc->f.fid.Fid.Volume = 0; /* invalid */
- /* mark entry as modified */
- adc->dflags |= DFEntryMod;
+ /* mark entry as modified */
+ adc->dflags |= DFEntryMod;
+ }
/* all done */
return 0;
-} /*afs_HashOutDCache */
+} /*afs_HashOutDCache */
-
-/*
- * afs_FlushDCache
+/*!
+ * Flush the given dcache entry, pulling it from hash chains
+ * and truncating the associated cache file.
*
- * Description:
- * Flush the given dcache entry, pulling it from hash chains
- * and truncating the associated cache file.
- *
- * Arguments:
- * adc: Ptr to dcache entry to flush.
+ * \param adc Ptr to dcache entry to flush.
*
- * Environment:
+ * \note Environment:
* This routine must be called with the afs_xdcache lock held
- * (in write mode)
+ * (in write mode).
*/
-
void
-afs_FlushDCache(adc)
-register struct dcache *adc;
-{ /*afs_FlushDCache*/
-
+afs_FlushDCache(register struct dcache *adc)
+{
AFS_STATCNT(afs_FlushDCache);
/*
* Bump the number of cache files flushed.
afs_stats_cmperf.cacheFlushes++;
/* remove from all hash tables */
- afs_HashOutDCache(adc);
+ afs_HashOutDCache(adc, 1);
/* Free its space; special case null operation, since truncate operation
* in UFS is slow even in this case, and this allows us to pre-truncate
if (afs_WaitForCacheDrain) {
if (afs_blocksUsed <=
- (CM_CACHESIZEDRAINEDPCT*afs_cacheBlocks)/100) {
+ PERCENT(CM_CACHESIZEDRAINEDPCT, afs_cacheBlocks)) {
afs_WaitForCacheDrain = 0;
afs_osi_Wakeup(&afs_WaitForCacheDrain);
}
}
-} /*afs_FlushDCache*/
+} /*afs_FlushDCache */
-/*
- * afs_FreeDCache
- *
- * Description: put a dcache entry on the free dcache entry list.
+/*!
+ * Put a dcache entry on the free dcache entry list.
*
- * Parameters: adc -- dcache entry to free
+ * \param adc dcache entry to free.
*
- * Environment: called with afs_xdcache lock write-locked.
+ * \note Environment: called with afs_xdcache lock write-locked.
*/
-static void afs_FreeDCache(adc)
- register struct dcache *adc;
+static void
+afs_FreeDCache(register struct dcache *adc)
{
/* Thread on free list, update free list count and mark entry as
* freed in its indexFlags element. Also, ensure DCache entry gets
if (afs_WaitForCacheDrain) {
if ((afs_blocksUsed - afs_blocksDiscarded) <=
- (CM_CACHESIZEDRAINEDPCT*afs_cacheBlocks)/100) {
+ PERCENT(CM_CACHESIZEDRAINEDPCT, afs_cacheBlocks)) {
afs_WaitForCacheDrain = 0;
afs_osi_Wakeup(&afs_WaitForCacheDrain);
}
}
-}
+} /* afs_FreeDCache */
-/*
- * afs_DiscardDCache
- *
- * Description:
- * Discard the cache element by moving it to the discardDCList.
- * This puts the cache element into a quasi-freed state, where
- * the space may be reused, but the file has not been truncated.
+/*!
+ * Discard the cache element by moving it to the discardDCList.
+ * This puts the cache element into a quasi-freed state, where
+ * the space may be reused, but the file has not been truncated.
*
- * Major Assumptions Here:
+ * \note Major Assumptions Here:
* Assumes that frag size is an integral power of two, less one,
* and that this is a two's complement machine. I don't
* know of any filesystems which violate this assumption...
*
- * Parameters:
- * adc : Ptr to dcache entry.
+ * \param adr Ptr to dcache entry.
*
- * Environment:
+ * \note Environment:
* Must be called with afs_xdcache write-locked.
*/
static void
-afs_DiscardDCache(adc)
- register struct dcache *adc;
-
-{ /*afs_DiscardDCache*/
-
+afs_DiscardDCache(register struct dcache *adc)
+{
register afs_int32 size;
AFS_STATCNT(afs_DiscardDCache);
osi_Assert(adc->refCount == 1);
- size = ((adc->f.chunkBytes + afs_fsfragsize)^afs_fsfragsize)>>10;/* round up */
+ size = ((adc->f.chunkBytes + afs_fsfragsize) ^ afs_fsfragsize) >> 10; /* round up */
afs_blocksDiscarded += size;
afs_stats_cmperf.cacheBlocksDiscarded = afs_blocksDiscarded;
if (afs_WaitForCacheDrain) {
if ((afs_blocksUsed - afs_blocksDiscarded) <=
- (CM_CACHESIZEDRAINEDPCT*afs_cacheBlocks)/100) {
+ PERCENT(CM_CACHESIZEDRAINEDPCT, afs_cacheBlocks)) {
afs_WaitForCacheDrain = 0;
afs_osi_Wakeup(&afs_WaitForCacheDrain);
}
}
-} /*afs_DiscardDCache*/
+} /*afs_DiscardDCache */
-/*
- * afs_FreeDiscardedDCache
- *
- * Description:
- * Free the next element on the list of discarded cache elements.
+/*!
+ * Free the next element on the list of discarded cache elements.
*/
static void
-afs_FreeDiscardedDCache()
+afs_FreeDiscardedDCache(void)
{
register struct dcache *tdc;
- register struct osi_file *tfile;
+ register struct osi_file *tfile;
register afs_int32 size;
AFS_STATCNT(afs_FreeDiscardedDCache);
- MObtainWriteLock(&afs_xdcache,510);
+ MObtainWriteLock(&afs_xdcache, 510);
if (!afs_blocksDiscarded) {
MReleaseWriteLock(&afs_xdcache);
return;
afs_discardDCList = afs_dvnextTbl[tdc->index];
afs_dvnextTbl[tdc->index] = NULLIDX;
afs_discardDCCount--;
- size = ((tdc->f.chunkBytes + afs_fsfragsize)^afs_fsfragsize)>>10;/* round up */
+ size = ((tdc->f.chunkBytes + afs_fsfragsize) ^ afs_fsfragsize) >> 10; /* round up */
afs_blocksDiscarded -= size;
afs_stats_cmperf.cacheBlocksDiscarded = afs_blocksDiscarded;
/* We can lock because we just took it off the free list */
/*
* Truncate the element to reclaim its space
*/
+#if defined(LINUX_USE_FH)
+ tfile = afs_CFileOpen(&tdc->f.fh, tdc->f.fh_type);
+#else
tfile = afs_CFileOpen(tdc->f.inode);
+#endif
afs_CFileTruncate(tfile, 0);
afs_CFileClose(tfile);
afs_AdjustSize(tdc, 0);
+ afs_DCMoveBucket(tdc, 0, 0);
/*
* Free the element we just truncated
*/
- MObtainWriteLock(&afs_xdcache,511);
+ MObtainWriteLock(&afs_xdcache, 511);
afs_indexFlags[tdc->index] &= ~IFDiscarded;
afs_FreeDCache(tdc);
+ tdc->f.states &= ~(DRO|DBackup|DRW);
ReleaseWriteLock(&tdc->lock);
afs_PutDCache(tdc);
MReleaseWriteLock(&afs_xdcache);
}
-/*
- * afs_MaybeFreeDiscardedDCache
- *
- * Description:
- * Free as many entries from the list of discarded cache elements
- * as we need to get the free space down below CM_WAITFORDRAINPCT (98%).
+/*!
+ * Free as many entries from the list of discarded cache elements
+ * as we need to get the free space down below CM_WAITFORDRAINPCT (98%).
*
- * Parameters:
- * None
+ * \return 0
*/
-afs_MaybeFreeDiscardedDCache()
+int
+afs_MaybeFreeDiscardedDCache(void)
{
AFS_STATCNT(afs_MaybeFreeDiscardedDCache);
- while (afs_blocksDiscarded &&
- (afs_blocksUsed > (CM_WAITFORDRAINPCT*afs_cacheBlocks)/100)) {
+ while (afs_blocksDiscarded
+ && (afs_blocksUsed >
+ PERCENT(CM_WAITFORDRAINPCT, afs_cacheBlocks))) {
afs_FreeDiscardedDCache();
}
return 0;
}
-/*
- * afs_GetDownDSlot
- *
- * Description:
- * Try to free up a certain number of disk slots.
+/*!
+ * Try to free up a certain number of disk slots.
*
- * Parameters:
- * anumber : Targeted number of disk slots to free up.
+ * \param anumber Targeted number of disk slots to free up.
*
- * Environment:
+ * \note Environment:
* Must be called with afs_xdcache write-locked.
+ *
*/
-#if defined(AFS_SGI_ENV) && defined(AFS_SGI_SHORTSTACK)
-extern SV_TYPE afs_sgibksync;
-extern SV_TYPE afs_sgibkwait;
-extern lock_t afs_sgibklock;
-extern struct dcache *afs_sgibklist;
-#endif
-
static void
-afs_GetDownDSlot(anumber)
- int anumber;
-
-{ /*afs_GetDownDSlot*/
-
+afs_GetDownDSlot(int anumber)
+{
struct afs_q *tq, *nq;
struct dcache *tdc;
int ix;
- unsigned int i=0;
unsigned int cnt;
AFS_STATCNT(afs_GetDownDSlot);
osi_Panic("getdowndslot nolock");
/* decrement anumber first for all dudes in free list */
- for(tdc = afs_freeDSList; tdc; tdc = (struct dcache *)tdc->lruq.next)
+ for (tdc = afs_freeDSList; tdc; tdc = (struct dcache *)tdc->lruq.next)
anumber--;
- if (anumber <= 0)
- return; /* enough already free */
+ if (anumber <= 0)
+ return; /* enough already free */
- for(cnt=0, tq = afs_DLRU.prev; tq != &afs_DLRU && anumber > 0;
- tq = nq, cnt++) {
- tdc = (struct dcache *) tq; /* q is first elt in dcache entry */
- nq = QPrev(tq); /* in case we remove it */
+ for (cnt = 0, tq = afs_DLRU.prev; tq != &afs_DLRU && anumber > 0;
+ tq = nq, cnt++) {
+ tdc = (struct dcache *)tq; /* q is first elt in dcache entry */
+ nq = QPrev(tq); /* in case we remove it */
if (tdc->refCount == 0) {
- if ((ix=tdc->index) == NULLIDX) osi_Panic("getdowndslot");
+ if ((ix = tdc->index) == NULLIDX)
+ osi_Panic("getdowndslot");
/* pull the entry out of the lruq and put it on the free list */
QRemove(&tdc->lruq);
/*
* ask proxy to do this for us - we don't have the stack space
*/
- while (tdc->dflags & DFEntryMod) {
+ while (tdc->dflags & DFEntryMod) {
int s;
AFS_GUNLOCK();
s = SPLOCK(afs_sgibklock);
#endif
}
- tdc->stamp = 0;
-#ifdef IHINT
- if (tdc->ihint) {
- struct osi_file * f = (struct osi_file *)tdc->ihint;
- tdc->ihint = 0;
- afs_UFSClose(f);
- nihints--;
- }
-#endif /* IHINT */
-
-
/* finally put the entry in the free list */
- afs_indexTable[ix] = (struct dcache *) 0;
+ afs_indexTable[ix] = NULL;
afs_indexFlags[ix] &= ~IFEverUsed;
tdc->index = NULLIDX;
- tdc->lruq.next = (struct afs_q *) afs_freeDSList;
+ tdc->lruq.next = (struct afs_q *)afs_freeDSList;
afs_freeDSList = tdc;
anumber--;
}
}
-} /*afs_GetDownDSlot*/
+} /*afs_GetDownDSlot */
/*
* Environment:
* Nothing interesting.
*/
-afs_RefDCache(adc)
- struct dcache *adc;
+int
+afs_RefDCache(struct dcache *adc)
{
ObtainWriteLock(&adc->tlock, 627);
if (adc->refCount < 0)
* Environment:
* Nothing interesting.
*/
-afs_PutDCache(adc)
- register struct dcache *adc;
-
-{ /*afs_PutDCache*/
+int
+afs_PutDCache(register struct dcache *adc)
+{
AFS_STATCNT(afs_PutDCache);
ObtainWriteLock(&adc->tlock, 276);
if (adc->refCount <= 0)
--adc->refCount;
ReleaseWriteLock(&adc->tlock);
return 0;
-
-} /*afs_PutDCache*/
+}
/*
* Both pvnLock and lock are write held.
*/
void
-afs_TryToSmush(avc, acred, sync)
- register struct vcache *avc;
- struct AFS_UCRED *acred;
- int sync;
-{ /*afs_TryToSmush*/
-
+afs_TryToSmush(register struct vcache *avc, struct AFS_UCRED *acred, int sync)
+{
register struct dcache *tdc;
register int index;
register int i;
AFS_STATCNT(afs_TryToSmush);
afs_Trace2(afs_iclSetp, CM_TRACE_TRYTOSMUSH, ICL_TYPE_POINTER, avc,
ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->m.Length));
- sync = 1; /* XX Temp testing XX*/
+ sync = 1; /* XX Temp testing XX */
#if defined(AFS_SUN5_ENV)
ObtainWriteLock(&avc->vlock, 573);
- avc->activeV++; /* block new getpages */
+ avc->activeV++; /* block new getpages */
ReleaseWriteLock(&avc->vlock);
#endif
/*
* Get the hash chain containing all dce's for this fid
*/
- i = DVHash(&avc->fid);
- MObtainWriteLock(&afs_xdcache,277);
- for(index = afs_dvhashTbl[i]; index != NULLIDX; index=i) {
- i = afs_dvnextTbl[index]; /* next pointer this hash table */
- if (afs_indexUnique[index] == avc->fid.Fid.Unique) {
- int releaseTlock = 1;
- tdc = afs_GetDSlot(index, (struct dcache *)0);
- if (!FidCmp(&tdc->f.fid, &avc->fid)) {
- if (sync) {
- if ((afs_indexFlags[index] & IFDataMod) == 0 &&
- tdc->refCount == 1) {
- ReleaseReadLock(&tdc->tlock);
- releaseTlock = 0;
- afs_FlushDCache(tdc);
- }
- } else
- afs_indexTable[index] = 0;
+ i = DVHash(&avc->fid);
+ MObtainWriteLock(&afs_xdcache, 277);
+ for (index = afs_dvhashTbl[i]; index != NULLIDX; index = i) {
+ i = afs_dvnextTbl[index]; /* next pointer this hash table */
+ if (afs_indexUnique[index] == avc->fid.Fid.Unique) {
+ int releaseTlock = 1;
+ tdc = afs_GetDSlot(index, NULL);
+ if (!FidCmp(&tdc->f.fid, &avc->fid)) {
+ if (sync) {
+ if ((afs_indexFlags[index] & IFDataMod) == 0
+ && tdc->refCount == 1) {
+ ReleaseReadLock(&tdc->tlock);
+ releaseTlock = 0;
+ afs_FlushDCache(tdc);
+ }
+ } else
+ afs_indexTable[index] = 0;
+ }
+ if (releaseTlock)
+ ReleaseReadLock(&tdc->tlock);
+ afs_PutDCache(tdc);
}
- if (releaseTlock) ReleaseReadLock(&tdc->tlock);
- afs_PutDCache(tdc);
- }
}
#if defined(AFS_SUN5_ENV)
ObtainWriteLock(&avc->vlock, 545);
#endif
MReleaseWriteLock(&afs_xdcache);
/*
- * It's treated like a callback so that when we do lookups we'll invalidate the unique bit if any
+ * It's treated like a callback so that when we do lookups we'll
+ * invalidate the unique bit if any
* trytoSmush occured during the lookup call
*/
afs_allCBs++;
-} /*afs_TryToSmush*/
+}
+
+/*
+ * afs_DCacheMissingChunks
+ *
+ * Description
+ * Given the cached info for a file, return the number of chunks that
+ * are not available from the dcache.
+ *
+ * Parameters:
+ * avc: Pointer to the (held) vcache entry to look in.
+ *
+ * Returns:
+ * The number of chunks which are not currently cached.
+ *
+ * Environment:
+ * The vcache entry is held upon entry.
+ */
+
+int
+afs_DCacheMissingChunks(struct vcache *avc)
+{
+ int i, index;
+ afs_size_t totalLength = 0;
+ afs_uint32 totalChunks = 0;
+ struct dcache *tdc;
+
+ totalLength = avc->m.Length;
+ if (avc->truncPos < totalLength)
+ totalLength = avc->truncPos;
+
+ /* Length is 0, no chunk missing. */
+ if (totalLength == 0)
+ return 0;
+
+ /* If totalLength is a multiple of chunksize, the last byte appears
+ * as being part of the next chunk, which does not exist.
+ * Decrementing totalLength by one fixes that.
+ */
+ totalLength--;
+ totalChunks = (AFS_CHUNK(totalLength) + 1);
+
+ /*
+ printf("Should have %d chunks for %u bytes\n",
+ totalChunks, (totalLength + 1));
+ */
+ i = DVHash(&avc->fid);
+ MObtainWriteLock(&afs_xdcache, 1001);
+ for (index = afs_dvhashTbl[i]; index != NULLIDX; index = i) {
+ i = afs_dvnextTbl[index];
+ if (afs_indexUnique[index] == avc->fid.Fid.Unique) {
+ tdc = afs_GetDSlot(index, NULL);
+ if (!FidCmp(&tdc->f.fid, &avc->fid)) {
+ totalChunks--;
+ }
+ ReleaseReadLock(&tdc->tlock);
+ afs_PutDCache(tdc);
+ }
+ }
+ MReleaseWriteLock(&afs_xdcache);
+
+ /*printf("Missing %d chunks\n", totalChunks);*/
+
+ return (totalChunks);
+}
/*
* afs_FindDCache
* The vcache entry is held upon entry.
*/
-struct dcache *afs_FindDCache(avc, abyte)
- register struct vcache *avc;
- afs_size_t abyte;
-
-{ /*afs_FindDCache*/
-
+struct dcache *
+afs_FindDCache(register struct vcache *avc, afs_size_t abyte)
+{
afs_int32 chunk;
register afs_int32 i, index;
- register struct dcache *tdc;
+ register struct dcache *tdc = NULL;
AFS_STATCNT(afs_FindDCache);
chunk = AFS_CHUNK(abyte);
* after write-locking the dcache.
*/
i = DCHash(&avc->fid, chunk);
- MObtainWriteLock(&afs_xdcache,278);
- for(index = afs_dchashTbl[i]; index != NULLIDX;) {
- if (afs_indexUnique[index] == avc->fid.Fid.Unique) {
- tdc = afs_GetDSlot(index, (struct dcache *)0);
- ReleaseReadLock(&tdc->tlock);
- if (!FidCmp(&tdc->f.fid, &avc->fid) && chunk == tdc->f.chunk) {
- break; /* leaving refCount high for caller */
+ MObtainWriteLock(&afs_xdcache, 278);
+ for (index = afs_dchashTbl[i]; index != NULLIDX;) {
+ if (afs_indexUnique[index] == avc->fid.Fid.Unique) {
+ tdc = afs_GetDSlot(index, NULL);
+ ReleaseReadLock(&tdc->tlock);
+ if (!FidCmp(&tdc->f.fid, &avc->fid) && chunk == tdc->f.chunk) {
+ break; /* leaving refCount high for caller */
+ }
+ afs_PutDCache(tdc);
}
- afs_PutDCache(tdc);
- }
- index = afs_dcnextTbl[index];
+ index = afs_dcnextTbl[index];
}
- MReleaseWriteLock(&afs_xdcache);
if (index != NULLIDX) {
hset(afs_indexTimes[tdc->index], afs_indexCounter);
hadd32(afs_indexCounter, 1);
+ MReleaseWriteLock(&afs_xdcache);
return tdc;
- }
- else
- return(struct dcache *) 0;
-
-} /*afs_FindDCache*/
+ }
+ MReleaseWriteLock(&afs_xdcache);
+ return NULL;
+} /*afs_FindDCache */
/*
* Environment:
* Nothing interesting.
*/
-static int afs_UFSCacheStoreProc(acall, afile, alen, avc, shouldWake,
- abytesToXferP, abytesXferredP)
- register struct rx_call *acall;
- struct osi_file *afile;
- register afs_int32 alen;
- afs_size_t *abytesToXferP;
- afs_size_t *abytesXferredP;
- struct vcache *avc;
- int *shouldWake;
-{ /* afs_UFSCacheStoreProc*/
-
+static int
+afs_UFSCacheStoreProc(register struct rx_call *acall, struct osi_file *afile,
+ register afs_int32 alen, struct vcache *avc,
+ int *shouldWake, afs_size_t * abytesToXferP,
+ afs_size_t * abytesXferredP)
+{
afs_int32 code, got;
register char *tbuffer;
register int tlen;
* In this case, alen is *always* the amount of data we'll be trying
* to ship here.
*/
- (*abytesToXferP) = alen;
+ (*abytesToXferP) = alen;
(*abytesXferredP) = 0;
#endif /* AFS_NOSTATS */
afs_Trace4(afs_iclSetp, CM_TRACE_STOREPROC, ICL_TYPE_POINTER, avc,
- ICL_TYPE_FID, &(avc->fid),
- ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->m.Length),
- ICL_TYPE_INT32, alen);
+ ICL_TYPE_FID, &(avc->fid), ICL_TYPE_OFFSET,
+ ICL_HANDLE_OFFSET(avc->m.Length), ICL_TYPE_INT32, alen);
tbuffer = osi_AllocLargeSpace(AFS_LRALLOCSIZ);
while (alen > 0) {
tlen = (alen > AFS_LRALLOCSIZ ? AFS_LRALLOCSIZ : alen);
got = afs_osi_Read(afile, -1, tbuffer, tlen);
- if ((got < 0)
-#if !defined(AFS_SUN5_ENV) && !defined(AFS_OSF_ENV) && !defined(AFS_SGI64_ENV) && !defined(AFS_LINUX20_ENV) && !defined(AFS_DARWIN_ENV) && !defined(AFS_FBSD_ENV)
+ if ((got < 0)
+#if defined(KERNEL_HAVE_UERROR)
|| (got != tlen && getuerror())
#endif
) {
osi_FreeLargeSpace(tbuffer);
return EIO;
}
- afs_Trace1(afs_iclSetp, CM_TRACE_STOREPROC2, ICL_TYPE_INT32, got);
+ afs_Trace2(afs_iclSetp, CM_TRACE_STOREPROC2, ICL_TYPE_OFFSET,
+ ICL_HANDLE_OFFSET(*tbuffer), ICL_TYPE_INT32, got);
RX_AFS_GUNLOCK();
- code = rx_Write(acall, tbuffer, got); /* writing 0 bytes will
- * push a short packet. Is that really what we want, just because the
- * data didn't come back from the disk yet? Let's try it and see. */
+ code = rx_Write(acall, tbuffer, got); /* writing 0 bytes will
+ * push a short packet. Is that really what we want, just because the
+ * data didn't come back from the disk yet? Let's try it and see. */
RX_AFS_GLOCK();
#ifndef AFS_NOSTATS
(*abytesXferredP) += code;
#endif /* AFS_NOSTATS */
if (code != got) {
+ code = rx_Error(acall);
osi_FreeLargeSpace(tbuffer);
- return -33;
+ return code ? code : -33;
}
alen -= got;
/*
* to continue.
*/
if (shouldWake && *shouldWake && (rx_GetRemoteStatus(acall) & 1)) {
- *shouldWake = 0; /* only do this once */
+ *shouldWake = 0; /* only do this once */
afs_wakeup(avc);
}
}
afs_Trace4(afs_iclSetp, CM_TRACE_STOREPROC, ICL_TYPE_POINTER, avc,
- ICL_TYPE_FID, &(avc->fid),
- ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(avc->m.Length),
- ICL_TYPE_INT32, alen);
+ ICL_TYPE_FID, &(avc->fid), ICL_TYPE_OFFSET,
+ ICL_HANDLE_OFFSET(avc->m.Length), ICL_TYPE_INT32, alen);
osi_FreeLargeSpace(tbuffer);
return 0;
-} /* afs_UFSCacheStoreProc*/
+} /* afs_UFSCacheStoreProc */
/*
* Nothing interesting.
*/
-static int afs_UFSCacheFetchProc(acall, afile, abase, adc, avc,
- abytesToXferP, abytesXferredP, lengthFound)
- register struct rx_call *acall;
- afs_size_t abase;
- afs_size_t *abytesToXferP;
- afs_size_t *abytesXferredP;
- struct dcache *adc;
- struct vcache *avc;
- struct osi_file *afile;
- afs_int32 lengthFound;
-{ /*UFS_CacheFetchProc*/
+static int
+afs_UFSCacheFetchProc(register struct rx_call *acall, struct osi_file *afile,
+ afs_size_t abase, struct dcache *adc,
+ struct vcache *avc, afs_size_t * abytesToXferP,
+ afs_size_t * abytesXferredP, afs_int32 lengthFound)
+{
afs_int32 length;
register afs_int32 code;
register char *tbuffer;
AFS_STATCNT(UFS_CacheFetchProc);
osi_Assert(WriteLocked(&adc->lock));
- afile->offset = 0; /* Each time start from the beginning */
+ afile->offset = 0; /* Each time start from the beginning */
length = lengthFound;
#ifndef AFS_NOSTATS
- (*abytesToXferP) = 0;
+ (*abytesToXferP) = 0;
(*abytesXferredP) = 0;
#endif /* AFS_NOSTATS */
tbuffer = osi_AllocLargeSpace(AFS_LRALLOCSIZ);
+ adc->validPos = abase;
do {
if (moredata) {
RX_AFS_GUNLOCK();
- code = rx_Read(acall, (char *)&length, sizeof(afs_int32));
+ code = rx_Read(acall, (char *)&length, sizeof(afs_int32));
RX_AFS_GLOCK();
length = ntohl(length);
- if (code != sizeof(afs_int32)) {
- osi_FreeLargeSpace(tbuffer);
- code = rx_Error(acall);
- return (code?code:-1); /* try to return code, not -1 */
- }
+ if (code != sizeof(afs_int32)) {
+ osi_FreeLargeSpace(tbuffer);
+ code = rx_Error(acall);
+ return (code ? code : -1); /* try to return code, not -1 */
+ }
}
/*
* The fetch protocol is extended for the AFS/DFS translator
}
#ifndef AFS_NOSTATS
(*abytesToXferP) += length;
-#endif /* AFS_NOSTATS */
+#endif /* AFS_NOSTATS */
while (length > 0) {
tlen = (length > AFS_LRALLOCSIZ ? AFS_LRALLOCSIZ : length);
+#ifdef RX_KERNEL_TRACE
+ afs_Trace1(afs_iclSetp, CM_TRACE_TIMESTAMP, ICL_TYPE_STRING,
+ "before rx_Read");
+#endif
RX_AFS_GUNLOCK();
code = rx_Read(acall, tbuffer, tlen);
RX_AFS_GLOCK();
+#ifdef RX_KERNEL_TRACE
+ afs_Trace1(afs_iclSetp, CM_TRACE_TIMESTAMP, ICL_TYPE_STRING,
+ "after rx_Read");
+#endif
#ifndef AFS_NOSTATS
(*abytesXferredP) += code;
-#endif /* AFS_NOSTATS */
+#endif /* AFS_NOSTATS */
if (code != tlen) {
osi_FreeLargeSpace(tbuffer);
afs_Trace3(afs_iclSetp, CM_TRACE_FETCH64READ,
- ICL_TYPE_POINTER, avc, ICL_TYPE_INT32, code,
- ICL_TYPE_INT32, length);
+ ICL_TYPE_POINTER, avc, ICL_TYPE_INT32, code,
+ ICL_TYPE_INT32, length);
return -34;
}
code = afs_osi_Write(afile, -1, tbuffer, tlen);
abase += tlen;
length -= tlen;
adc->validPos = abase;
- afs_Trace4(afs_iclSetp, CM_TRACE_DCACHEWAIT,
- ICL_TYPE_STRING, __FILE__,
- ICL_TYPE_INT32, __LINE__,
- ICL_TYPE_POINTER, adc,
- ICL_TYPE_INT32, adc->dflags);
- afs_osi_Wakeup(&adc->validPos);
+ if (afs_osi_Wakeup(&adc->validPos) == 0)
+ afs_Trace4(afs_iclSetp, CM_TRACE_DCACHEWAKE, ICL_TYPE_STRING,
+ __FILE__, ICL_TYPE_INT32, __LINE__,
+ ICL_TYPE_POINTER, adc, ICL_TYPE_INT32,
+ adc->dflags);
}
} while (moredata);
osi_FreeLargeSpace(tbuffer);
return 0;
-} /* afs_UFSCacheFetchProc*/
+} /* afs_UFSCacheFetchProc */
-/*
- * afs_GetDCache
+/*!
+ * Get a fresh dcache from the free or discarded list.
*
- * Description:
- * This function is called to obtain a reference to data stored in
- * the disk cache, locating a chunk of data containing the desired
+ * \param avc Who's dcache is this going to be?
+ * \param chunk The position where it will be placed in.
+ * \param lock How are locks held.
+ * \param ashFid If this dcache going to be used for a shadow dir,
+ * this is it's fid.
+ *
+ * \note Required locks:
+ * - afs_xdcache (W)
+ * - avc (R if (lock & 1) set and W otherwise)
+ * \note It write locks the new dcache. The caller must unlock it.
+ *
+ * \return The new dcache.
+ */
+struct dcache *afs_AllocDCache(struct vcache *avc,
+ afs_int32 chunk,
+ afs_int32 lock,
+ struct VenusFid *ashFid)
+{
+ struct dcache *tdc = NULL;
+ afs_uint32 size = 0;
+ struct osi_file *file;
+
+ if (afs_discardDCList == NULLIDX
+ || ((lock & 2) && afs_freeDCList != NULLIDX)) {
+
+ afs_indexFlags[afs_freeDCList] &= ~IFFree;
+ tdc = afs_GetDSlot(afs_freeDCList, 0);
+ osi_Assert(tdc->refCount == 1);
+ ReleaseReadLock(&tdc->tlock);
+ ObtainWriteLock(&tdc->lock, 604);
+ afs_freeDCList = afs_dvnextTbl[tdc->index];
+ afs_freeDCCount--;
+ } else {
+ afs_indexFlags[afs_discardDCList] &= ~IFDiscarded;
+ tdc = afs_GetDSlot(afs_discardDCList, 0);
+ osi_Assert(tdc->refCount == 1);
+ ReleaseReadLock(&tdc->tlock);
+ ObtainWriteLock(&tdc->lock, 605);
+ afs_discardDCList = afs_dvnextTbl[tdc->index];
+ afs_discardDCCount--;
+ size =
+ ((tdc->f.chunkBytes +
+ afs_fsfragsize) ^ afs_fsfragsize) >> 10;
+ tdc->f.states &= ~(DRO|DBackup|DRW);
+ afs_DCMoveBucket(tdc, size, 0);
+ afs_blocksDiscarded -= size;
+ afs_stats_cmperf.cacheBlocksDiscarded = afs_blocksDiscarded;
+ if (lock & 2) {
+ /* Truncate the chunk so zeroes get filled properly */
+#if defined(LINUX_USE_FH)
+ file = afs_CFileOpen(&tdc->f.fh, tdc->f.fh_type);
+#else
+ file = afs_CFileOpen(tdc->f.inode);
+#endif
+ afs_CFileTruncate(file, 0);
+ afs_CFileClose(file);
+ afs_AdjustSize(tdc, 0);
+ }
+ }
+
+ /*
+ * Locks held:
+ * avc->lock(R) if setLocks
+ * avc->lock(W) if !setLocks
+ * tdc->lock(W)
+ * afs_xdcache(W)
+ */
+
+ /*
+ * Fill in the newly-allocated dcache record.
+ */
+ afs_indexFlags[tdc->index] &= ~(IFDirtyPages | IFAnyPages);
+ if (ashFid)
+ /* Use shadow fid if provided. */
+ tdc->f.fid = *ashFid;
+ else
+ /* Use normal vcache's fid otherwise. */
+ tdc->f.fid = avc->fid;
+ if (avc->states & CRO)
+ tdc->f.states = DRO;
+ else if (avc->states & CBackup)
+ tdc->f.states = DBackup;
+ else
+ tdc->f.states = DRW;
+ afs_DCMoveBucket(tdc, 0, afs_DCGetBucket(avc));
+ afs_indexUnique[tdc->index] = tdc->f.fid.Fid.Unique;
+ if (!ashFid)
+ hones(tdc->f.versionNo); /* invalid value */
+ tdc->f.chunk = chunk;
+ tdc->validPos = AFS_CHUNKTOBASE(chunk);
+ /* XXX */
+ if (tdc->lruq.prev == &tdc->lruq)
+ osi_Panic("lruq 1");
+
+ return tdc;
+}
+
+/*
+ * afs_GetDCache
+ *
+ * Description:
+ * This function is called to obtain a reference to data stored in
+ * the disk cache, locating a chunk of data containing the desired
* byte and returning a reference to the disk cache entry, with its
* reference count incremented.
*
* Update the vnode-to-dcache hint if we can get the vnode lock
* right away. Assumes dcache entry is at least read-locked.
*/
-void updateV2DC(int lockVc, struct vcache *v, struct dcache *d, int src) {
- if (!lockVc || 0 == NBObtainWriteLock(&v->lock,src)) {
- if (hsame(v->m.DataVersion, d->f.versionNo) && v->callback) {
- v->quick.dc = d;
- v->quick.stamp = d->stamp = MakeStamp();
- v->quick.minLoc = AFS_CHUNKTOBASE(d->f.chunk);
- /* Don't think I need these next two lines forever */
- v->quick.len = d->f.chunkBytes;
- v->h1.dchint = d;
- }
- if (lockVc) ReleaseWriteLock(&v->lock);
+void
+updateV2DC(int lockVc, struct vcache *v, struct dcache *d, int src)
+{
+ if (!lockVc || 0 == NBObtainWriteLock(&v->lock, src)) {
+ if (hsame(v->m.DataVersion, d->f.versionNo) && v->callback)
+ v->dchint = d;
+ if (lockVc)
+ ReleaseWriteLock(&v->lock);
}
}
-struct dcache *afs_GetDCache(avc, abyte, areq, aoffset, alen, aflags)
- register struct vcache *avc; /* Write-locked unless aflags & 1 */
- afs_size_t abyte;
- afs_size_t *aoffset, *alen;
- int aflags;
- register struct vrequest *areq;
-
-{ /*afs_GetDCache*/
-
- register afs_int32 i, code, code1, shortcut , adjustsize=0;
+/* avc - Write-locked unless aflags & 1 */
+struct dcache *
+afs_GetDCache(register struct vcache *avc, afs_size_t abyte,
+ register struct vrequest *areq, afs_size_t * aoffset,
+ afs_size_t * alen, int aflags)
+{
+ register afs_int32 i, code, code1 = 0, shortcut;
+#if defined(AFS_AIX32_ENV) || defined(AFS_SGI_ENV)
+ register afs_int32 adjustsize = 0;
+#endif
int setLocks;
afs_int32 index;
afs_int32 us;
afs_int32 chunk;
- afs_size_t maxGoodLength; /* amount of good data at server */
+ afs_size_t maxGoodLength; /* amount of good data at server */
struct rx_call *tcall;
afs_size_t Position = 0;
#ifdef AFS_64BIT_CLIENT
afs_size_t tsize;
+ afs_size_t lengthFound; /* as returned from server */
#endif /* AFS_64BIT_CLIENT */
- afs_int32 size, tlen; /* size of segment to transfer */
- afs_size_t lengthFound; /* as returned from server */
+ afs_int32 size, tlen; /* size of segment to transfer */
struct tlocal1 *tsmall = 0;
register struct dcache *tdc;
register struct osi_file *file;
register struct conn *tc;
int downDCount = 0;
- struct server *newCallback;
+ struct server *newCallback = NULL;
char setNewCallback;
char setVcacheStatus;
char doVcacheUpdate;
int doReallyAdjustSize = 0;
int overWriteWholeChunk = 0;
- XSTATS_DECLS
+ XSTATS_DECLS;
#ifndef AFS_NOSTATS
struct afs_stats_xferData *xferP; /* Ptr to this op's xfer struct */
- osi_timeval_t xferStartTime, /*FS xfer start time*/
- xferStopTime; /*FS xfer stop time*/
- afs_size_t bytesToXfer; /* # bytes to xfer*/
- afs_size_t bytesXferred; /* # bytes actually xferred*/
- struct afs_stats_AccessInfo *accP; /*Ptr to access record in stats*/
- int fromReplica; /*Are we reading from a replica?*/
- int numFetchLoops; /*# times around the fetch/analyze loop*/
+ osi_timeval_t xferStartTime, /*FS xfer start time */
+ xferStopTime; /*FS xfer stop time */
+ afs_size_t bytesToXfer; /* # bytes to xfer */
+ afs_size_t bytesXferred; /* # bytes actually xferred */
+ struct afs_stats_AccessInfo *accP; /*Ptr to access record in stats */
+ int fromReplica; /*Are we reading from a replica? */
+ int numFetchLoops; /*# times around the fetch/analyze loop */
#endif /* AFS_NOSTATS */
AFS_STATCNT(afs_GetDCache);
-
if (dcacheDisabled)
return NULL;
* Determine the chunk number and offset within the chunk corresponding
* to the desired byte.
*/
- if (avc->fid.Fid.Vnode & 1) { /* if (vType(avc) == VDIR) */
+ if (avc->fid.Fid.Vnode & 1) { /* if (vType(avc) == VDIR) */
chunk = 0;
- }
- else {
+ } else {
chunk = AFS_CHUNK(abyte);
}
/* come back to here if we waited for the cache to drain. */
-RetryGetDCache:
+ RetryGetDCache:
setNewCallback = setVcacheStatus = 0;
shortcut = 0;
/* check hints first! (might could use bcmp or some such...) */
- if (tdc = avc->h1.dchint) {
+ if ((tdc = avc->dchint)) {
int dcLocked;
/*
MObtainReadLock(&afs_xdcache);
dcLocked = (0 == NBObtainSharedLock(&tdc->lock, 601));
- if (dcLocked &&
- (tdc->index != NULLIDX) && !FidCmp(&tdc->f.fid, &avc->fid) &&
- chunk == tdc->f.chunk &&
- !(afs_indexFlags[tdc->index] & (IFFree|IFDiscarded))) {
+ if (dcLocked && (tdc->index != NULLIDX)
+ && !FidCmp(&tdc->f.fid, &avc->fid) && chunk == tdc->f.chunk
+ && !(afs_indexFlags[tdc->index] & (IFFree | IFDiscarded))) {
/* got the right one. It might not be the right version, and it
* might be fetching, but it's the right dcache entry.
*/
MReleaseReadLock(&afs_xdcache);
shortcut = 1;
- if (hsame(tdc->f.versionNo, avc->m.DataVersion) &&
- !(tdc->dflags & DFFetching)) {
+ if (hsame(tdc->f.versionNo, avc->m.DataVersion)
+ && !(tdc->dflags & DFFetching)) {
afs_stats_cmperf.dcacheHits++;
MObtainWriteLock(&afs_xdcache, 559);
goto done;
}
} else {
- if (dcLocked) ReleaseSharedLock(&tdc->lock);
+ if (dcLocked)
+ ReleaseSharedLock(&tdc->lock);
MReleaseReadLock(&afs_xdcache);
}
* tdc->lock(S) if tdc
*/
- if (!tdc) { /* If the hint wasn't the right dcache entry */
+ if (!tdc) { /* If the hint wasn't the right dcache entry */
/*
* Hash on the [fid, chunk] and get the corresponding dcache index
* after write-locking the dcache.
*/
-RetryLookup:
+ RetryLookup:
/* Locks held:
* avc->lock(R) if setLocks && !slowPass
/* check to make sure our space is fine */
afs_MaybeWakeupTruncateDaemon();
- MObtainWriteLock(&afs_xdcache,280);
+ MObtainWriteLock(&afs_xdcache, 280);
us = NULLIDX;
- for (index = afs_dchashTbl[i]; index != NULLIDX; ) {
+ for (index = afs_dchashTbl[i]; index != NULLIDX;) {
if (afs_indexUnique[index] == avc->fid.Fid.Unique) {
- tdc = afs_GetDSlot(index, (struct dcache *)0);
+ tdc = afs_GetDSlot(index, NULL);
ReleaseReadLock(&tdc->tlock);
/*
* Locks held:
*/
if (!FidCmp(&tdc->f.fid, &avc->fid) && chunk == tdc->f.chunk) {
/* Move it up in the beginning of the list */
- if (afs_dchashTbl[i] != index) {
+ if (afs_dchashTbl[i] != index) {
afs_dcnextTbl[us] = afs_dcnextTbl[index];
afs_dcnextTbl[index] = afs_dchashTbl[i];
afs_dchashTbl[i] = index;
}
MReleaseWriteLock(&afs_xdcache);
ObtainSharedLock(&tdc->lock, 606);
- break; /* leaving refCount high for caller */
+ break; /* leaving refCount high for caller */
}
afs_PutDCache(tdc);
tdc = 0;
/* Make sure there is a free dcache entry for us to use */
if (afs_discardDCList == NULLIDX && afs_freeDCList == NULLIDX) {
while (1) {
- if (!setLocks) avc->states |= CDCLock;
- afs_GetDownD(5, (int*)0); /* just need slots */
- if (!setLocks) avc->states &= ~CDCLock;
- if (afs_discardDCList != NULLIDX || afs_freeDCList != NULLIDX)
+ if (!setLocks)
+ avc->states |= CDCLock;
+ /* just need slots */
+ afs_GetDownD(5, (int *)0, afs_DCGetBucket(avc));
+ if (!setLocks)
+ avc->states &= ~CDCLock;
+ if (afs_discardDCList != NULLIDX
+ || afs_freeDCList != NULLIDX)
break;
/* If we can't get space for 5 mins we give up and panic */
- if (++downDCount > 300)
- osi_Panic("getdcache");
+ if (++downDCount > 300) {
+#if defined(AFS_CACHE_BYPASS)
+ afs_warn("GetDCache calling osi_Panic: No space in five minutes.\n downDCount: %d\n aoffset: %d alen: %d\n", downDCount, aoffset, alen);
+#endif
+ osi_Panic("getdcache");
+ }
MReleaseWriteLock(&afs_xdcache);
/*
* Locks held:
}
}
- if (afs_discardDCList == NULLIDX ||
- ((aflags & 2) && afs_freeDCList != NULLIDX)) {
-
- afs_indexFlags[afs_freeDCList] &= ~IFFree;
- tdc = afs_GetDSlot(afs_freeDCList, 0);
- osi_Assert(tdc->refCount == 1);
- ReleaseReadLock(&tdc->tlock);
- ObtainWriteLock(&tdc->lock, 604);
- afs_freeDCList = afs_dvnextTbl[tdc->index];
- afs_freeDCCount--;
- } else {
- afs_indexFlags[afs_discardDCList] &= ~IFDiscarded;
- tdc = afs_GetDSlot(afs_discardDCList, 0);
- osi_Assert(tdc->refCount == 1);
- ReleaseReadLock(&tdc->tlock);
- ObtainWriteLock(&tdc->lock, 605);
- afs_discardDCList = afs_dvnextTbl[tdc->index];
- afs_discardDCCount--;
- size = ((tdc->f.chunkBytes + afs_fsfragsize)^afs_fsfragsize)>>10;
- afs_blocksDiscarded -= size;
- afs_stats_cmperf.cacheBlocksDiscarded = afs_blocksDiscarded;
- if (aflags & 2) {
- /* Truncate the chunk so zeroes get filled properly */
- file = afs_CFileOpen(tdc->f.inode);
- afs_CFileTruncate(file, 0);
- afs_CFileClose(file);
- afs_AdjustSize(tdc, 0);
- }
- }
-
- /*
- * Locks held:
- * avc->lock(R) if setLocks
- * avc->lock(W) if !setLocks
- * tdc->lock(W)
- * afs_xdcache(W)
- */
-
- /*
- * Fill in the newly-allocated dcache record.
- */
- afs_indexFlags[tdc->index] &= ~(IFDirtyPages | IFAnyPages);
- tdc->f.fid = avc->fid;
- afs_indexUnique[tdc->index] = tdc->f.fid.Fid.Unique;
- hones(tdc->f.versionNo); /* invalid value */
- tdc->f.chunk = chunk;
- tdc->validPos = AFS_CHUNKTOBASE(chunk);
- /* XXX */
- if (tdc->lruq.prev == &tdc->lruq) osi_Panic("lruq 1");
+ tdc = afs_AllocDCache(avc, chunk, aflags, NULL);
/*
* Now add to the two hash chains - note that i is still set
afs_dvhashTbl[i] = tdc->index;
tdc->dflags = DFEntryMod;
tdc->mflags = 0;
- tdc->f.states = 0;
afs_MaybeWakeupTruncateDaemon();
MReleaseWriteLock(&afs_xdcache);
ConvertWToSLock(&tdc->lock);
}
- } /* vcache->dcache hint failed */
+ }
+
+ /* vcache->dcache hint failed */
/*
* Locks held:
* avc->lock(R) if setLocks && !slowPass
* avc->lock(W) if !setLocks || slowPass
* tdc->lock(S)
*/
-
afs_Trace4(afs_iclSetp, CM_TRACE_GETDCACHE2, ICL_TYPE_POINTER, avc,
- ICL_TYPE_POINTER, tdc,
- ICL_TYPE_INT32, hgetlo(tdc->f.versionNo),
- ICL_TYPE_INT32, hgetlo(avc->m.DataVersion));
+ ICL_TYPE_POINTER, tdc, ICL_TYPE_INT32,
+ hgetlo(tdc->f.versionNo), ICL_TYPE_INT32,
+ hgetlo(avc->m.DataVersion));
/*
* Here we have the entry in tdc, with its refCount incremented.
* Note: we don't use the S-lock on avc; it costs concurrency when
* that this chunk's data hasn't been filled by another client.
*/
size = AFS_CHUNKSIZE(abyte);
- if (aflags & 4) /* called from write */
+ if (aflags & 4) /* called from write */
tlen = *alen;
- else /* called from read */
+ else /* called from read */
tlen = tdc->validPos - abyte;
Position = AFS_CHUNKTOBASE(chunk);
- afs_Trace4(afs_iclSetp, CM_TRACE_GETDCACHE3,
- ICL_TYPE_INT32, tlen,
- ICL_TYPE_INT32, aflags,
- ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(abyte),
- ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(Position));
+ afs_Trace4(afs_iclSetp, CM_TRACE_GETDCACHE3, ICL_TYPE_INT32, tlen,
+ ICL_TYPE_INT32, aflags, ICL_TYPE_OFFSET,
+ ICL_HANDLE_OFFSET(abyte), ICL_TYPE_OFFSET,
+ ICL_HANDLE_OFFSET(Position));
if ((aflags & 4) && (hiszero(avc->m.DataVersion)))
doAdjustSize = 1;
- if ((aflags & 4) && (abyte == Position) && (tlen >= size))
+ if ((AFS_CHUNKTOBASE(chunk) >= avc->m.Length) ||
+ ((aflags & 4) && (abyte == Position) && (tlen >= size)))
overWriteWholeChunk = 1;
if (doAdjustSize || overWriteWholeChunk) {
#if defined(AFS_AIX32_ENV) || defined(AFS_SGI_ENV)
- #ifdef AFS_SGI_ENV
- #ifdef AFS_SGI64_ENV
- if (doAdjustSize) adjustsize = NBPP;
- #else /* AFS_SGI64_ENV */
- if (doAdjustSize) adjustsize = 8192;
- #endif /* AFS_SGI64_ENV */
- #else /* AFS_SGI_ENV */
- if (doAdjustSize) adjustsize = 4096;
- #endif /* AFS_SGI_ENV */
- if (AFS_CHUNKTOBASE(chunk)+adjustsize >= avc->m.Length &&
+#ifdef AFS_SGI_ENV
+#ifdef AFS_SGI64_ENV
+ if (doAdjustSize)
+ adjustsize = NBPP;
+#else /* AFS_SGI64_ENV */
+ if (doAdjustSize)
+ adjustsize = 8192;
+#endif /* AFS_SGI64_ENV */
+#else /* AFS_SGI_ENV */
+ if (doAdjustSize)
+ adjustsize = 4096;
+#endif /* AFS_SGI_ENV */
+ if (AFS_CHUNKTOBASE(chunk) + adjustsize >= avc->m.Length &&
#else /* defined(AFS_AIX32_ENV) || defined(AFS_SGI_ENV) */
- #if defined(AFS_SUN_ENV) || defined(AFS_OSF_ENV)
- if ((doAdjustSize || (AFS_CHUNKTOBASE(chunk) >= avc->m.Length)) &&
- #else
- if (AFS_CHUNKTOBASE(chunk) >= avc->m.Length &&
- #endif
+#if defined(AFS_SUN5_ENV) || defined(AFS_OSF_ENV)
+ if ((doAdjustSize || (AFS_CHUNKTOBASE(chunk) >= avc->m.Length)) &&
+#else
+ if (AFS_CHUNKTOBASE(chunk) >= avc->m.Length &&
+#endif
#endif /* defined(AFS_AIX32_ENV) || defined(AFS_SGI_ENV) */
- !hsame(avc->m.DataVersion, tdc->f.versionNo))
+ !hsame(avc->m.DataVersion, tdc->f.versionNo))
doReallyAdjustSize = 1;
if (doReallyAdjustSize || overWriteWholeChunk) {
/* no data in file to read at this position */
UpgradeSToWLock(&tdc->lock, 607);
+#if defined(LINUX_USE_FH)
+ file = afs_CFileOpen(&tdc->f.fh, tdc->f.fh_type);
+#else
file = afs_CFileOpen(tdc->f.inode);
+#endif
afs_CFileTruncate(file, 0);
afs_CFileClose(file);
afs_AdjustSize(tdc, 0);
else
ReleaseReadLock(&avc->lock);
}
- return tdc; /* check if we're done */
+ return tdc; /* check if we're done */
}
/*
/*
* Version number mismatch.
*/
+ /*
+ * If we are disconnected, then we can't do much of anything
+ * because the data doesn't match the file.
+ */
+ if (AFS_IS_DISCONNECTED) {
+ ReleaseSharedLock(&tdc->lock);
+ if (setLocks) {
+ if (slowPass)
+ ReleaseWriteLock(&avc->lock);
+ else
+ ReleaseReadLock(&avc->lock);
+ }
+ /* Flush the Dcache */
+ afs_PutDCache(tdc);
+
+ return NULL;
+ }
UpgradeSToWLock(&tdc->lock, 609);
/*
/* Watch for standard race condition around osi_FlushText */
if (hsame(avc->m.DataVersion, tdc->f.versionNo)) {
- updateV2DC(setLocks, avc, tdc, 569); /* set hint */
- afs_stats_cmperf.dcacheHits++;
+ updateV2DC(setLocks, avc, tdc, 569); /* set hint */
+ afs_stats_cmperf.dcacheHits++;
ConvertWToSLock(&tdc->lock);
goto done;
}
/* Sleep here when cache needs to be drained. */
- if (setLocks && !slowPass &&
- (afs_blocksUsed > (CM_WAITFORDRAINPCT*afs_cacheBlocks)/100)) {
+ if (setLocks && !slowPass
+ && (afs_blocksUsed >
+ PERCENT(CM_WAITFORDRAINPCT, afs_cacheBlocks))) {
/* Make sure truncate daemon is running */
afs_MaybeWakeupTruncateDaemon();
ObtainWriteLock(&tdc->tlock, 614);
- tdc->refCount--; /* we'll re-obtain the dcache when we re-try. */
+ tdc->refCount--; /* we'll re-obtain the dcache when we re-try. */
ReleaseWriteLock(&tdc->tlock);
ReleaseWriteLock(&tdc->lock);
ReleaseReadLock(&avc->lock);
- while ((afs_blocksUsed-afs_blocksDiscarded) >
- (CM_WAITFORDRAINPCT*afs_cacheBlocks)/100) {
+ while ((afs_blocksUsed - afs_blocksDiscarded) >
+ PERCENT(CM_WAITFORDRAINPCT, afs_cacheBlocks)) {
afs_WaitForCacheDrain = 1;
afs_osi_Sleep(&afs_WaitForCacheDrain);
}
/* Do not fetch data beyond truncPos. */
maxGoodLength = avc->m.Length;
- if (avc->truncPos < maxGoodLength) maxGoodLength = avc->truncPos;
+ if (avc->truncPos < maxGoodLength)
+ maxGoodLength = avc->truncPos;
Position = AFS_CHUNKBASE(abyte);
if (vType(avc) == VDIR) {
size = avc->m.Length;
/* pre-reserve space for file */
afs_AdjustSize(tdc, size);
}
- size = 999999999; /* max size for transfer */
- }
- else {
+ size = 999999999; /* max size for transfer */
+ } else {
size = AFS_CHUNKSIZE(abyte); /* expected max size */
/* don't read past end of good data on server */
if (Position + size > maxGoodLength)
size = maxGoodLength - Position;
- if (size < 0) size = 0; /* Handle random races */
+ if (size < 0)
+ size = 0; /* Handle random races */
if (size > tdc->f.chunkBytes) {
/* pre-reserve space for file */
afs_AdjustSize(tdc, size); /* changes chunkBytes */
/* max size for transfer still in size */
}
}
- if (afs_mariner && !tdc->f.chunk)
- afs_MarinerLog("fetch$Fetching", avc); /* , Position, size, afs_indexCounter );*/
+ if (afs_mariner && !tdc->f.chunk)
+ afs_MarinerLog("fetch$Fetching", avc); /* , Position, size, afs_indexCounter ); */
/*
* Right now, we only have one tool, and it's a hammer. So, we
* fetch the whole file.
*/
- DZap(&tdc->f.inode); /* pages in cache may be old */
-#ifdef IHINT
- if (file = tdc->ihint) {
- if (tdc->f.inode == file->inum )
- usedihint++;
- else {
- tdc->ihint = 0;
- afs_UFSClose(file);
- file = 0;
- nihints--;
- file = osi_UFSOpen(tdc->f.inode);
- }
- }
- else
-#endif /* IHINT */
+ DZap(tdc); /* pages in cache may be old */
+#if defined(LINUX_USE_FH)
+ file = afs_CFileOpen(&tdc->f.fh, tdc->f.fh_type);
+#else
file = afs_CFileOpen(tdc->f.inode);
+#endif
afs_RemoveVCB(&avc->fid);
tdc->f.states |= DWriting;
tdc->dflags |= DFFetching;
tdc->validPos = Position; /* which is AFS_CHUNKBASE(abyte) */
if (tdc->mflags & DFFetchReq) {
tdc->mflags &= ~DFFetchReq;
- afs_osi_Wakeup(&tdc->validPos);
+ if (afs_osi_Wakeup(&tdc->validPos) == 0)
+ afs_Trace4(afs_iclSetp, CM_TRACE_DCACHEWAKE, ICL_TYPE_STRING,
+ __FILE__, ICL_TYPE_INT32, __LINE__,
+ ICL_TYPE_POINTER, tdc, ICL_TYPE_INT32,
+ tdc->dflags);
}
- tsmall = (struct tlocal1 *) osi_AllocLargeSpace(sizeof(struct tlocal1));
+ tsmall =
+ (struct tlocal1 *)osi_AllocLargeSpace(sizeof(struct tlocal1));
setVcacheStatus = 0;
#ifndef AFS_NOSTATS
/*
#endif /* AFS_NOSTATS */
/* this is a cache miss */
afs_Trace4(afs_iclSetp, CM_TRACE_FETCHPROC, ICL_TYPE_POINTER, avc,
- ICL_TYPE_FID, &(avc->fid),
- ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(Position),
- ICL_TYPE_INT32, size);
+ ICL_TYPE_FID, &(avc->fid), ICL_TYPE_OFFSET,
+ ICL_HANDLE_OFFSET(Position), ICL_TYPE_INT32, size);
- if (size) afs_stats_cmperf.dcacheMisses++;
+ if (size)
+ afs_stats_cmperf.dcacheMisses++;
code = 0;
/*
* Dynamic root support: fetch data from local memory.
dynrootLen -= Position;
if (size > dynrootLen)
size = dynrootLen;
- if (size < 0) size = 0;
- code = afs_osi_Write(file, -1, dynrootDir, size);
+ if (size < 0)
+ size = 0;
+ code = afs_CFileWrite(file, 0, dynrootDir, size);
+ afs_PutDynroot();
+
+ if (code == size)
+ code = 0;
+ else
+ code = -1;
+
+ tdc->validPos = Position + size;
+ afs_CFileTruncate(file, size); /* prune it */
+ } else if (afs_IsDynrootMount(avc)) {
+ char *dynrootDir;
+ int dynrootLen;
+
+ afs_GetDynrootMount(&dynrootDir, &dynrootLen, &tsmall->OutStatus);
+
+ dynrootDir += Position;
+ dynrootLen -= Position;
+ if (size > dynrootLen)
+ size = dynrootLen;
+ if (size < 0)
+ size = 0;
+ code = afs_CFileWrite(file, 0, dynrootDir, size);
afs_PutDynroot();
if (code == size)
code = -1;
tdc->validPos = Position + size;
- afs_CFileTruncate(file, size); /* prune it */
+ afs_CFileTruncate(file, size); /* prune it */
} else
- /*
- * Not a dynamic vnode: do the real fetch.
- */
- if (size) do {
/*
- * Locks held:
- * avc->lock(R) if setLocks && !slowPass
- * avc->lock(W) if !setLocks || slowPass
- * tdc->lock(W)
+ * Not a dynamic vnode: do the real fetch.
*/
+ do {
+ /*
+ * Locks held:
+ * avc->lock(R) if setLocks && !slowPass
+ * avc->lock(W) if !setLocks || slowPass
+ * tdc->lock(W)
+ */
- tc = afs_Conn(&avc->fid, areq, SHARED_LOCK);
- if (tc) {
- afs_int32 length_hi, length, bytes;
+ tc = afs_Conn(&avc->fid, areq, SHARED_LOCK);
+ if (tc) {
+ afs_int32 length_hi, length, bytes;
#ifndef AFS_NOSTATS
- numFetchLoops++;
- if (fromReplica)
- (accP->numReplicasAccessed)++;
-
+ numFetchLoops++;
+ if (fromReplica)
+ (accP->numReplicasAccessed)++;
+
#endif /* AFS_NOSTATS */
- if (!setLocks || slowPass) {
- avc->callback = tc->srvr->server;
- } else {
- newCallback = tc->srvr->server;
- setNewCallback = 1;
- }
- i = osi_Time();
- RX_AFS_GUNLOCK();
- tcall = rx_NewCall(tc->id);
- RX_AFS_GLOCK();
+ if (!setLocks || slowPass) {
+ avc->callback = tc->srvr->server;
+ } else {
+ newCallback = tc->srvr->server;
+ setNewCallback = 1;
+ }
+ i = osi_Time();
+ RX_AFS_GUNLOCK();
+ tcall = rx_NewCall(tc->id);
+ RX_AFS_GLOCK();
- XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_FETCHDATA);
+ XSTATS_START_TIME(AFS_STATS_FS_RPCIDX_FETCHDATA);
#ifdef AFS_64BIT_CLIENT
- length_hi = code = 0;
- if (!afs_serverHasNo64Bit(tc)) {
- tsize = size;
- RX_AFS_GUNLOCK();
- code = StartRXAFS_FetchData64(tcall,
- (struct AFSFid *) &avc->fid.Fid,
- Position, tsize);
- if (code != 0) {
- RX_AFS_GLOCK();
- afs_Trace2(afs_iclSetp, CM_TRACE_FETCH64CODE,
- ICL_TYPE_POINTER, avc, ICL_TYPE_INT32, code);
- } else {
- bytes = rx_Read(tcall, (char *)&length_hi, sizeof(afs_int32));
- RX_AFS_GLOCK();
- afs_Trace2(afs_iclSetp, CM_TRACE_FETCH64CODE,
- ICL_TYPE_POINTER, avc, ICL_TYPE_INT32, code);
- if (bytes == sizeof(afs_int32)) {
- length_hi = ntohl(length_hi);
- } else {
- length_hi = 0;
- code = rx_Error(tcall);
+ length_hi = code = 0;
+ if (!afs_serverHasNo64Bit(tc)) {
+ tsize = size;
+ RX_AFS_GUNLOCK();
+ code =
+ StartRXAFS_FetchData64(tcall,
+ (struct AFSFid *)&avc->fid.
+ Fid, Position, tsize);
+ if (code != 0) {
+ RX_AFS_GLOCK();
+ afs_Trace2(afs_iclSetp, CM_TRACE_FETCH64CODE,
+ ICL_TYPE_POINTER, avc, ICL_TYPE_INT32,
+ code);
+ } else {
+ bytes =
+ rx_Read(tcall, (char *)&length_hi,
+ sizeof(afs_int32));
+ RX_AFS_GLOCK();
+ if (bytes == sizeof(afs_int32)) {
+ length_hi = ntohl(length_hi);
+ } else {
+ length_hi = 0;
+ code = rx_Error(tcall);
+ RX_AFS_GUNLOCK();
+ code1 = rx_EndCall(tcall, code);
+ RX_AFS_GLOCK();
+ tcall = (struct rx_call *)0;
+ }
+ }
+ }
+ if (code == RXGEN_OPCODE || afs_serverHasNo64Bit(tc)) {
+ if (Position > 0x7FFFFFFF) {
+ code = EFBIG;
+ } else {
+ afs_int32 pos;
+ pos = Position;
RX_AFS_GUNLOCK();
- code1 = rx_EndCall(tcall, code);
- RX_AFS_GLOCK();
- tcall = (struct rx_call *) 0;
+ if (!tcall)
+ tcall = rx_NewCall(tc->id);
+ code =
+ StartRXAFS_FetchData(tcall, (struct AFSFid *)
+ &avc->fid.Fid, pos,
+ size);
+ RX_AFS_GLOCK();
}
+ afs_serverSetNo64Bit(tc);
}
- }
- if (code == RXGEN_OPCODE || afs_serverHasNo64Bit(tc)) {
- if (Position > 0x7FFFFFFF) {
- code = EFBIG;
- } else {
- afs_int32 pos;
- pos = Position;
+ if (code == 0) {
RX_AFS_GUNLOCK();
- if (!tcall)
- tcall = rx_NewCall(tc->id);
- code = StartRXAFS_FetchData(tcall,
- (struct AFSFid *) &avc->fid.Fid, pos, size);
- RX_AFS_GLOCK();
- }
- afs_serverSetNo64Bit(tc);
- }
- if (code == 0) {
- RX_AFS_GUNLOCK();
- bytes = rx_Read(tcall, (char *)&length, sizeof(afs_int32));
- RX_AFS_GLOCK();
- if (bytes == sizeof(afs_int32)) {
- length = ntohl(length);
- } else {
- code = rx_Error(tcall);
+ bytes =
+ rx_Read(tcall, (char *)&length,
+ sizeof(afs_int32));
+ RX_AFS_GLOCK();
+ if (bytes == sizeof(afs_int32)) {
+ length = ntohl(length);
+ } else {
+ code = rx_Error(tcall);
+ }
}
- }
- FillInt64(lengthFound, length_hi, length);
- afs_Trace3(afs_iclSetp, CM_TRACE_FETCH64LENG,
- ICL_TYPE_POINTER, avc, ICL_TYPE_INT32, code,
- ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(lengthFound));
+ FillInt64(lengthFound, length_hi, length);
+ afs_Trace3(afs_iclSetp, CM_TRACE_FETCH64LENG,
+ ICL_TYPE_POINTER, avc, ICL_TYPE_INT32, code,
+ ICL_TYPE_OFFSET,
+ ICL_HANDLE_OFFSET(lengthFound));
#else /* AFS_64BIT_CLIENT */
- RX_AFS_GUNLOCK();
- code = StartRXAFS_FetchData(tcall,
- (struct AFSFid *) &avc->fid.Fid,
- Position, size);
- RX_AFS_GLOCK();
- if (code == 0) {
- RX_AFS_GUNLOCK();
- bytes = rx_Read(tcall, (char *)&length, sizeof(afs_int32));
+ RX_AFS_GUNLOCK();
+ code =
+ StartRXAFS_FetchData(tcall,
+ (struct AFSFid *)&avc->fid.Fid,
+ Position, size);
RX_AFS_GLOCK();
- if (bytes == sizeof(afs_int32)) {
- length = ntohl(length);
- } else {
- code = rx_Error(tcall);
+ if (code == 0) {
+ RX_AFS_GUNLOCK();
+ bytes =
+ rx_Read(tcall, (char *)&length,
+ sizeof(afs_int32));
+ RX_AFS_GLOCK();
+ if (bytes == sizeof(afs_int32)) {
+ length = ntohl(length);
+ } else {
+ code = rx_Error(tcall);
+ }
}
- }
#endif /* AFS_64BIT_CLIENT */
- if (code == 0) {
+ if (code == 0) {
#ifndef AFS_NOSTATS
- xferP = &(afs_stats_cmfullperf.rpc.fsXferTimes[AFS_STATS_FS_XFERIDX_FETCHDATA]);
- osi_GetuTime(&xferStartTime);
-
- code = afs_CacheFetchProc(tcall, file,
- (afs_size_t) Position, tdc, avc,
- &bytesToXfer, &bytesXferred, length);
-
- osi_GetuTime(&xferStopTime);
- (xferP->numXfers)++;
- if (!code) {
- (xferP->numSuccesses)++;
- afs_stats_XferSumBytes[AFS_STATS_FS_XFERIDX_FETCHDATA] += bytesXferred;
- (xferP->sumBytes) += (afs_stats_XferSumBytes[AFS_STATS_FS_XFERIDX_FETCHDATA] >> 10);
- afs_stats_XferSumBytes[AFS_STATS_FS_XFERIDX_FETCHDATA] &= 0x3FF;
- if (bytesXferred < xferP->minBytes)
- xferP->minBytes = bytesXferred;
- if (bytesXferred > xferP->maxBytes)
- xferP->maxBytes = bytesXferred;
-
- /*
- * Tally the size of the object. Note: we tally the actual size,
- * NOT the number of bytes that made it out over the wire.
- */
- if (bytesToXfer <= AFS_STATS_MAXBYTES_BUCKET0)
- (xferP->count[0])++;
- else
- if (bytesToXfer <= AFS_STATS_MAXBYTES_BUCKET1)
- (xferP->count[1])++;
- else
- if (bytesToXfer <= AFS_STATS_MAXBYTES_BUCKET2)
- (xferP->count[2])++;
- else
- if (bytesToXfer <= AFS_STATS_MAXBYTES_BUCKET3)
- (xferP->count[3])++;
- else
- if (bytesToXfer <= AFS_STATS_MAXBYTES_BUCKET4)
- (xferP->count[4])++;
- else
- if (bytesToXfer <= AFS_STATS_MAXBYTES_BUCKET5)
- (xferP->count[5])++;
- else
- if (bytesToXfer <= AFS_STATS_MAXBYTES_BUCKET6)
- (xferP->count[6])++;
- else
- if (bytesToXfer <= AFS_STATS_MAXBYTES_BUCKET7)
- (xferP->count[7])++;
- else
- (xferP->count[8])++;
-
- afs_stats_GetDiff(elapsedTime, xferStartTime, xferStopTime);
- afs_stats_AddTo((xferP->sumTime), elapsedTime);
- afs_stats_SquareAddTo((xferP->sqrTime), elapsedTime);
- if (afs_stats_TimeLessThan(elapsedTime, (xferP->minTime))) {
- afs_stats_TimeAssign((xferP->minTime), elapsedTime);
- }
- if (afs_stats_TimeGreaterThan(elapsedTime, (xferP->maxTime))) {
- afs_stats_TimeAssign((xferP->maxTime), elapsedTime);
- }
- }
+ xferP =
+ &(afs_stats_cmfullperf.rpc.
+ fsXferTimes[AFS_STATS_FS_XFERIDX_FETCHDATA]);
+ osi_GetuTime(&xferStartTime);
+
+ code =
+ afs_CacheFetchProc(tcall, file,
+ (afs_size_t) Position, tdc,
+ avc, &bytesToXfer,
+ &bytesXferred, length);
+
+ osi_GetuTime(&xferStopTime);
+ (xferP->numXfers)++;
+ if (!code) {
+ (xferP->numSuccesses)++;
+ afs_stats_XferSumBytes
+ [AFS_STATS_FS_XFERIDX_FETCHDATA] +=
+ bytesXferred;
+ (xferP->sumBytes) +=
+ (afs_stats_XferSumBytes
+ [AFS_STATS_FS_XFERIDX_FETCHDATA] >> 10);
+ afs_stats_XferSumBytes
+ [AFS_STATS_FS_XFERIDX_FETCHDATA] &= 0x3FF;
+ if (bytesXferred < xferP->minBytes)
+ xferP->minBytes = bytesXferred;
+ if (bytesXferred > xferP->maxBytes)
+ xferP->maxBytes = bytesXferred;
+
+ /*
+ * Tally the size of the object. Note: we tally the actual size,
+ * NOT the number of bytes that made it out over the wire.
+ */
+ if (bytesToXfer <= AFS_STATS_MAXBYTES_BUCKET0)
+ (xferP->count[0])++;
+ else if (bytesToXfer <=
+ AFS_STATS_MAXBYTES_BUCKET1)
+ (xferP->count[1])++;
+ else if (bytesToXfer <=
+ AFS_STATS_MAXBYTES_BUCKET2)
+ (xferP->count[2])++;
+ else if (bytesToXfer <=
+ AFS_STATS_MAXBYTES_BUCKET3)
+ (xferP->count[3])++;
+ else if (bytesToXfer <=
+ AFS_STATS_MAXBYTES_BUCKET4)
+ (xferP->count[4])++;
+ else if (bytesToXfer <=
+ AFS_STATS_MAXBYTES_BUCKET5)
+ (xferP->count[5])++;
+ else if (bytesToXfer <=
+ AFS_STATS_MAXBYTES_BUCKET6)
+ (xferP->count[6])++;
+ else if (bytesToXfer <=
+ AFS_STATS_MAXBYTES_BUCKET7)
+ (xferP->count[7])++;
+ else
+ (xferP->count[8])++;
+
+ afs_stats_GetDiff(elapsedTime, xferStartTime,
+ xferStopTime);
+ afs_stats_AddTo((xferP->sumTime), elapsedTime);
+ afs_stats_SquareAddTo((xferP->sqrTime),
+ elapsedTime);
+ if (afs_stats_TimeLessThan
+ (elapsedTime, (xferP->minTime))) {
+ afs_stats_TimeAssign((xferP->minTime),
+ elapsedTime);
+ }
+ if (afs_stats_TimeGreaterThan
+ (elapsedTime, (xferP->maxTime))) {
+ afs_stats_TimeAssign((xferP->maxTime),
+ elapsedTime);
+ }
+ }
#else
- code = afs_CacheFetchProc(tcall, file, Position, tdc, avc, 0, 0, length);
+ code =
+ afs_CacheFetchProc(tcall, file, Position, tdc,
+ avc, 0, 0, length);
#endif /* AFS_NOSTATS */
- }
- if (code == 0) {
+ }
+ if (code == 0) {
+ RX_AFS_GUNLOCK();
+ code =
+ EndRXAFS_FetchData(tcall, &tsmall->OutStatus,
+ &tsmall->CallBack,
+ &tsmall->tsync);
+ RX_AFS_GLOCK();
+ }
+ XSTATS_END_TIME;
RX_AFS_GUNLOCK();
- code = EndRXAFS_FetchData(tcall,
- &tsmall->OutStatus,
- &tsmall->CallBack,
- &tsmall->tsync);
+ if (tcall)
+ code1 = rx_EndCall(tcall, code);
RX_AFS_GLOCK();
- }
- XSTATS_END_TIME;
- RX_AFS_GUNLOCK();
- if (tcall)
- code1 = rx_EndCall(tcall, code);
- RX_AFS_GLOCK();
- }
- else {
- code = -1;
- }
- if ( !code && code1 )
- code = code1;
-
- if (code == 0) {
- /* callback could have been broken (or expired) in a race here,
- * but we return the data anyway. It's as good as we knew about
- * when we started. */
- /*
- * validPos is updated by CacheFetchProc, and can only be
- * modifed under a dcache write lock, which we've blocked out
- */
- size = tdc->validPos - Position; /* actual segment size */
- if (size < 0) size = 0;
- afs_CFileTruncate(file, size); /* prune it */
- }
- else {
- if (!setLocks || slowPass) {
- ObtainWriteLock(&afs_xcbhash, 453);
- afs_DequeueCallback(avc);
- avc->states &= ~(CStatd | CUnique);
- avc->callback = (struct server *)0;
- ReleaseWriteLock(&afs_xcbhash);
- if (avc->fid.Fid.Vnode & 1 || (vType(avc) == VDIR))
- osi_dnlc_purgedp(avc);
} else {
- /* Something lost. Forget about performance, and go
- * back with a vcache write lock.
+ code = -1;
+ }
+ if (!code && code1)
+ code = code1;
+
+ if (code == 0) {
+ /* callback could have been broken (or expired) in a race here,
+ * but we return the data anyway. It's as good as we knew about
+ * when we started. */
+ /*
+ * validPos is updated by CacheFetchProc, and can only be
+ * modifed under a dcache write lock, which we've blocked out
*/
- afs_CFileTruncate(file, 0);
- afs_AdjustSize(tdc, 0);
- afs_CFileClose(file);
- osi_FreeLargeSpace(tsmall);
- tsmall = 0;
- ReleaseWriteLock(&tdc->lock);
- afs_PutDCache(tdc);
- tdc = 0;
- ReleaseReadLock(&avc->lock);
- slowPass = 1;
- goto RetryGetDCache;
+ size = tdc->validPos - Position; /* actual segment size */
+ if (size < 0)
+ size = 0;
+ afs_CFileTruncate(file, size); /* prune it */
+ } else {
+ if (!setLocks || slowPass) {
+ ObtainWriteLock(&afs_xcbhash, 453);
+ afs_DequeueCallback(avc);
+ avc->states &= ~(CStatd | CUnique);
+ avc->callback = NULL;
+ ReleaseWriteLock(&afs_xcbhash);
+ if (avc->fid.Fid.Vnode & 1 || (vType(avc) == VDIR))
+ osi_dnlc_purgedp(avc);
+ } else {
+ /* Something lost. Forget about performance, and go
+ * back with a vcache write lock.
+ */
+ afs_CFileTruncate(file, 0);
+ afs_AdjustSize(tdc, 0);
+ afs_CFileClose(file);
+ osi_FreeLargeSpace(tsmall);
+ tsmall = 0;
+ ReleaseWriteLock(&tdc->lock);
+ afs_PutDCache(tdc);
+ tdc = 0;
+ ReleaseReadLock(&avc->lock);
+ slowPass = 1;
+ goto RetryGetDCache;
+ }
}
- }
- } while
- (afs_Analyze(tc, code, &avc->fid, areq,
- AFS_STATS_FS_RPCIDX_FETCHDATA,
- SHARED_LOCK, (struct cell *)0));
+ } while (afs_Analyze
+ (tc, code, &avc->fid, areq,
+ AFS_STATS_FS_RPCIDX_FETCHDATA, SHARED_LOCK, NULL));
/*
* Locks held:
#endif /* AFS_NOSTATS */
tdc->dflags &= ~DFFetching;
- afs_Trace4(afs_iclSetp, CM_TRACE_DCACHEWAIT,
- ICL_TYPE_STRING, __FILE__,
- ICL_TYPE_INT32, __LINE__,
- ICL_TYPE_POINTER, tdc,
- ICL_TYPE_INT32, tdc->dflags);
- afs_osi_Wakeup(&tdc->validPos);
- if (avc->execsOrWriters == 0) tdc->f.states &= ~DWriting;
+ if (afs_osi_Wakeup(&tdc->validPos) == 0)
+ afs_Trace4(afs_iclSetp, CM_TRACE_DCACHEWAKE, ICL_TYPE_STRING,
+ __FILE__, ICL_TYPE_INT32, __LINE__, ICL_TYPE_POINTER,
+ tdc, ICL_TYPE_INT32, tdc->dflags);
+ if (avc->execsOrWriters == 0)
+ tdc->f.states &= ~DWriting;
/* now, if code != 0, we have an error and should punt.
* note that we have the vcache write lock, either because
afs_CFileClose(file);
ZapDCE(tdc); /* sets DFEntryMod */
if (vType(avc) == VDIR) {
- DZap(&tdc->f.inode);
+ DZap(tdc);
}
+ tdc->f.states &= ~(DRO|DBackup|DRW);
+ afs_DCMoveBucket(tdc, 0, 0);
ReleaseWriteLock(&tdc->lock);
afs_PutDCache(tdc);
- ObtainWriteLock(&afs_xcbhash, 454);
- afs_DequeueCallback(avc);
- avc->states &= ~( CStatd | CUnique );
- ReleaseWriteLock(&afs_xcbhash);
- if (avc->fid.Fid.Vnode & 1 || (vType(avc) == VDIR))
- osi_dnlc_purgedp(avc);
- /*
- * Locks held:
- * avc->lock(W); assert(!setLocks || slowPass)
- */
- osi_Assert(!setLocks || slowPass);
- tdc = (struct dcache *) 0;
- goto done;
+ if (!afs_IsDynroot(avc)) {
+ ObtainWriteLock(&afs_xcbhash, 454);
+ afs_DequeueCallback(avc);
+ avc->states &= ~(CStatd | CUnique);
+ ReleaseWriteLock(&afs_xcbhash);
+ if (avc->fid.Fid.Vnode & 1 || (vType(avc) == VDIR))
+ osi_dnlc_purgedp(avc);
+ /*
+ * Locks held:
+ * avc->lock(W); assert(!setLocks || slowPass)
+ */
+ osi_Assert(!setLocks || slowPass);
+ }
+ tdc->f.states &= ~(DRO|DBackup|DRW);
+ afs_DCMoveBucket(tdc, 0, 0);
+ tdc = NULL;
+ goto done;
}
/* otherwise we copy in the just-fetched info */
afs_CFileClose(file);
- afs_AdjustSize(tdc, size); /* new size */
+ afs_AdjustSize(tdc, size); /* new size */
/*
* Copy appropriate fields into vcache. Status is
* copied later where we selectively acquire the
afs_ProcessFS(avc, &tsmall->OutStatus, areq);
else
setVcacheStatus = 1;
- hset64(tdc->f.versionNo, tsmall->OutStatus.dataVersionHigh, tsmall->OutStatus.DataVersion);
+ hset64(tdc->f.versionNo, tsmall->OutStatus.dataVersionHigh,
+ tsmall->OutStatus.DataVersion);
tdc->dflags |= DFEntryMod;
afs_indexFlags[tdc->index] |= IFEverUsed;
ConvertWToSLock(&tdc->lock);
- } /*Data version numbers don't match*/
+ } /*Data version numbers don't match */
else {
/*
* Data version numbers match.
*/
afs_stats_cmperf.dcacheHits++;
- } /*Data version numbers match*/
+ } /*Data version numbers match */
- updateV2DC(setLocks, avc, tdc, 335); /* set hint */
-done:
+ updateV2DC(setLocks, avc, tdc, 335); /* set hint */
+ done:
/*
* Locks held:
* avc->lock(R) if setLocks && !slowPass
/*
* See if this was a reference to a file in the local cell.
*/
- if (avc->fid.Cell == LOCALCELL)
+ if (afs_IsPrimaryCellNum(avc->fid.Cell))
afs_stats_cmperf.dlocalAccesses++;
else
afs_stats_cmperf.dremoteAccesses++;
*aoffset = abyte;
else
*aoffset = AFS_CHUNKOFFSET(abyte);
- *alen = *aoffset + tdc->f.chunkBytes - abyte;
+ *alen = (tdc->f.chunkBytes - *aoffset);
ReleaseSharedLock(&tdc->lock);
}
if (tsmall) {
hset64(statusDV, tsmall->OutStatus.dataVersionHigh,
- tsmall->OutStatus.DataVersion);
+ tsmall->OutStatus.DataVersion);
if (setVcacheStatus && avc->m.Length != tsmall->OutStatus.Length)
doVcacheUpdate = 1;
/* Check if we need to perform any last-minute fixes with a write-lock */
if (!setLocks || doVcacheUpdate) {
- if (setNewCallback) avc->callback = newCallback;
- if (tsmall) afs_ProcessFS(avc, &tsmall->OutStatus, areq);
- if (setLocks) ReleaseWriteLock(&avc->lock);
+ if (setNewCallback)
+ avc->callback = newCallback;
+ if (tsmall && setVcacheStatus)
+ afs_ProcessFS(avc, &tsmall->OutStatus, areq);
+ if (setLocks)
+ ReleaseWriteLock(&avc->lock);
}
- if (tsmall) osi_FreeLargeSpace(tsmall);
+ if (tsmall)
+ osi_FreeLargeSpace(tsmall);
return tdc;
-} /*afs_GetDCache*/
+} /*afs_GetDCache */
/*
* The afs_xdcache is write-locked through this whole affair.
*/
void
-afs_WriteThroughDSlots()
-
-{ /*afs_WriteThroughDSlots*/
-
+afs_WriteThroughDSlots(void)
+{
register struct dcache *tdc;
- register afs_int32 i, touchedit=0;
- struct dcache **ents;
- int entmax, entcount;
+ register afs_int32 i, touchedit = 0;
+
+ struct afs_q DirtyQ, *tq;
AFS_STATCNT(afs_WriteThroughDSlots);
* holding afs_xdcache. So we enter xdcache, get a reference
* for every dcache entry, and exit xdcache.
*/
- MObtainWriteLock(&afs_xdcache,283);
- entmax = afs_cacheFiles;
- ents = afs_osi_Alloc(entmax * sizeof(struct dcache *));
- entcount = 0;
- for(i = 0; i < afs_cacheFiles; i++) {
+ MObtainWriteLock(&afs_xdcache, 283);
+ QInit(&DirtyQ);
+ for (i = 0; i < afs_cacheFiles; i++) {
tdc = afs_indexTable[i];
/* Grab tlock in case the existing refcount isn't zero */
tdc->refCount++;
ReleaseWriteLock(&tdc->tlock);
- ents[entcount++] = tdc;
+ QAdd(&DirtyQ, &tdc->dirty);
}
}
MReleaseWriteLock(&afs_xdcache);
* afs_cacheInodep, and flush it. Don't forget to put back
* the refcounts.
*/
- for (i = 0; i < entcount; i++) {
- tdc = ents[i];
+#define DQTODC(q) ((struct dcache *)(((char *) (q)) - sizeof(struct afs_q)))
+
+ for (tq = DirtyQ.prev; tq != &DirtyQ; tq = QPrev(tq)) {
+ tdc = DQTODC(tq);
if (tdc->dflags & DFEntryMod) {
int wrLock;
MReleaseWriteLock(&afs_xdcache);
touchedit = 1;
}
- if (wrLock) ReleaseWriteLock(&tdc->lock);
+ if (wrLock)
+ ReleaseWriteLock(&tdc->lock);
}
afs_PutDCache(tdc);
}
- afs_osi_Free(ents, entmax * sizeof(struct dcache *));
MObtainWriteLock(&afs_xdcache, 617);
if (!touchedit && (cacheDiskType != AFS_FCACHE_TYPE_MEM)) {
afs_osi_Write(afs_cacheInodep, 0, &theader, sizeof(theader));
}
MReleaseWriteLock(&afs_xdcache);
-
-} /*afs_WriteThroughDSlots*/
+}
/*
* afs_MemGetDSlot
* Must be called with afs_xdcache write-locked.
*/
-struct dcache *afs_MemGetDSlot(aslot, tmpdc)
- register afs_int32 aslot;
- register struct dcache *tmpdc;
-
-{ /*afs_MemGetDSlot*/
-
- register afs_int32 code;
+struct dcache *
+afs_MemGetDSlot(register afs_int32 aslot, register struct dcache *tmpdc)
+{
register struct dcache *tdc;
- register char *tfile;
int existing = 0;
AFS_STATCNT(afs_MemGetDSlot);
- if (CheckLock(&afs_xdcache) != -1) osi_Panic("getdslot nolock");
- if (aslot < 0 || aslot >= afs_cacheFiles) osi_Panic("getdslot slot");
+ if (CheckLock(&afs_xdcache) != -1)
+ osi_Panic("getdslot nolock");
+ if (aslot < 0 || aslot >= afs_cacheFiles)
+ osi_Panic("getdslot slot %d (of %d)", aslot, afs_cacheFiles);
tdc = afs_indexTable[aslot];
if (tdc) {
- QRemove(&tdc->lruq); /* move to queue head */
+ QRemove(&tdc->lruq); /* move to queue head */
QAdd(&afs_DLRU, &tdc->lruq);
/* We're holding afs_xdcache, but get tlock in case refCount != 0 */
ObtainWriteLock(&tdc->tlock, 624);
ConvertWToRLock(&tdc->tlock);
return tdc;
}
- if (tmpdc == (struct dcache *)0) {
- if (!afs_freeDSList) afs_GetDownDSlot(4);
+ if (tmpdc == NULL) {
+ if (!afs_freeDSList)
+ afs_GetDownDSlot(4);
if (!afs_freeDSList) {
/* none free, making one is better than a panic */
afs_stats_cmperf.dcacheXAllocs++; /* count in case we have a leak */
- tdc = (struct dcache *) afs_osi_Alloc(sizeof (struct dcache));
-#ifdef AFS_AIX32_ENV
+ tdc = (struct dcache *)afs_osi_Alloc(sizeof(struct dcache));
+#ifdef KERNEL_HAVE_PIN
pin((char *)tdc, sizeof(struct dcache)); /* XXX */
#endif
} else {
tdc = afs_freeDSList;
- afs_freeDSList = (struct dcache *) tdc->lruq.next;
+ afs_freeDSList = (struct dcache *)tdc->lruq.next;
existing = 1;
}
tdc->dflags = 0; /* up-to-date, not in free q */
tdc->mflags = 0;
QAdd(&afs_DLRU, &tdc->lruq);
- if (tdc->lruq.prev == &tdc->lruq) osi_Panic("lruq 3");
- }
- else {
+ if (tdc->lruq.prev == &tdc->lruq)
+ osi_Panic("lruq 3");
+ } else {
tdc = tmpdc;
tdc->f.states = 0;
}
-
+
/* initialize entry */
tdc->f.fid.Cell = 0;
tdc->f.fid.Fid.Volume = 0;
osi_Assert(0 == NBObtainWriteLock(&tdc->tlock, 676));
}
- RWLOCK_INIT(&tdc->lock, "dcache lock");
- RWLOCK_INIT(&tdc->tlock, "dcache tlock");
- RWLOCK_INIT(&tdc->mflock, "dcache flock");
+ AFS_RWLOCK_INIT(&tdc->lock, "dcache lock");
+ AFS_RWLOCK_INIT(&tdc->tlock, "dcache tlock");
+ AFS_RWLOCK_INIT(&tdc->mflock, "dcache flock");
ObtainReadLock(&tdc->tlock);
-
- if (tmpdc == (struct dcache *)0)
+
+ if (tmpdc == NULL)
afs_indexTable[aslot] = tdc;
return tdc;
-} /*afs_MemGetDSlot*/
+} /*afs_MemGetDSlot */
unsigned int last_error = 0, lasterrtime = 0;
* Environment:
* afs_xdcache lock write-locked.
*/
-struct dcache *afs_UFSGetDSlot(aslot, tmpdc)
- register afs_int32 aslot;
- register struct dcache *tmpdc;
-
-{ /*afs_UFSGetDSlot*/
-
+struct dcache *
+afs_UFSGetDSlot(register afs_int32 aslot, register struct dcache *tmpdc)
+{
register afs_int32 code;
register struct dcache *tdc;
int existing = 0;
+ int entryok;
AFS_STATCNT(afs_UFSGetDSlot);
- if (CheckLock(&afs_xdcache) != -1) osi_Panic("getdslot nolock");
- if (aslot < 0 || aslot >= afs_cacheFiles) osi_Panic("getdslot slot");
+ if (CheckLock(&afs_xdcache) != -1)
+ osi_Panic("getdslot nolock");
+ if (aslot < 0 || aslot >= afs_cacheFiles)
+ osi_Panic("getdslot slot %d (of %d)", aslot, afs_cacheFiles);
tdc = afs_indexTable[aslot];
if (tdc) {
- QRemove(&tdc->lruq); /* move to queue head */
+ QRemove(&tdc->lruq); /* move to queue head */
QAdd(&afs_DLRU, &tdc->lruq);
/* Grab tlock in case refCount != 0 */
ObtainWriteLock(&tdc->tlock, 625);
* If we weren't passed an in-memory region to place the file info,
* we have to allocate one.
*/
- if (tmpdc == (struct dcache *)0) {
- if (!afs_freeDSList) afs_GetDownDSlot(4);
+ if (tmpdc == NULL) {
+ if (!afs_freeDSList)
+ afs_GetDownDSlot(4);
if (!afs_freeDSList) {
/* none free, making one is better than a panic */
afs_stats_cmperf.dcacheXAllocs++; /* count in case we have a leak */
- tdc = (struct dcache *) afs_osi_Alloc(sizeof (struct dcache));
-#ifdef AFS_AIX32_ENV
+ tdc = (struct dcache *)afs_osi_Alloc(sizeof(struct dcache));
+#ifdef KERNEL_HAVE_PIN
pin((char *)tdc, sizeof(struct dcache)); /* XXX */
#endif
} else {
tdc = afs_freeDSList;
- afs_freeDSList = (struct dcache *) tdc->lruq.next;
+ afs_freeDSList = (struct dcache *)tdc->lruq.next;
existing = 1;
}
tdc->dflags = 0; /* up-to-date, not in free q */
tdc->mflags = 0;
QAdd(&afs_DLRU, &tdc->lruq);
- if (tdc->lruq.prev == &tdc->lruq) osi_Panic("lruq 3");
- }
- else {
+ if (tdc->lruq.prev == &tdc->lruq)
+ osi_Panic("lruq 3");
+ } else {
tdc = tmpdc;
tdc->f.states = 0;
- tdc->ihint = 0;
}
/*
- * Seek to the aslot'th entry and read it in.
- */
- code = afs_osi_Read(afs_cacheInodep, sizeof(struct fcache) * aslot + sizeof(struct afs_fheader),
- (char *)(&tdc->f), sizeof(struct fcache));
- if (code != sizeof(struct fcache)) {
+ * Seek to the aslot'th entry and read it in.
+ */
+ code =
+ afs_osi_Read(afs_cacheInodep,
+ sizeof(struct fcache) * aslot +
+ sizeof(struct afs_fheader), (char *)(&tdc->f),
+ sizeof(struct fcache));
+ entryok = 1;
+ if (code != sizeof(struct fcache))
+ entryok = 0;
+ if (!afs_CellNumValid(tdc->f.fid.Cell))
+ entryok = 0;
+
+ if (!entryok) {
tdc->f.fid.Cell = 0;
tdc->f.fid.Fid.Volume = 0;
tdc->f.chunk = -1;
hones(tdc->f.versionNo);
tdc->dflags |= DFEntryMod;
-#if !defined(AFS_SUN5_ENV) && !defined(AFS_OSF_ENV) && !defined(AFS_SGI64_ENV) && !defined(AFS_LINUX20_ENV) && !defined(AFS_DARWIN_ENV) && !defined(AFS_FBSD_ENV)
+#if defined(KERNEL_HAVE_UERROR)
last_error = getuerror();
#endif
lasterrtime = osi_Time();
afs_indexUnique[aslot] = tdc->f.fid.Fid.Unique;
+ tdc->f.states &= ~(DRO|DBackup|DRW);
+ afs_DCMoveBucket(tdc, 0, 0);
+ } else {
+ if (&tdc->f != 0) {
+ if (tdc->f.states & DRO) {
+ afs_DCMoveBucket(tdc, 0, 2);
+ } else if (tdc->f.states & DBackup) {
+ afs_DCMoveBucket(tdc, 0, 1);
+ } else {
+ afs_DCMoveBucket(tdc, 0, 1);
+ }
+ }
}
tdc->refCount = 1;
tdc->index = aslot;
+ if (tdc->f.chunk >= 0)
+ tdc->validPos = AFS_CHUNKTOBASE(tdc->f.chunk) + tdc->f.chunkBytes;
+ else
+ tdc->validPos = 0;
if (existing) {
osi_Assert(0 == NBObtainWriteLock(&tdc->lock, 674));
osi_Assert(0 == NBObtainWriteLock(&tdc->tlock, 676));
}
- RWLOCK_INIT(&tdc->lock, "dcache lock");
- RWLOCK_INIT(&tdc->tlock, "dcache tlock");
- RWLOCK_INIT(&tdc->mflock, "dcache flock");
+ AFS_RWLOCK_INIT(&tdc->lock, "dcache lock");
+ AFS_RWLOCK_INIT(&tdc->tlock, "dcache tlock");
+ AFS_RWLOCK_INIT(&tdc->mflock, "dcache flock");
ObtainReadLock(&tdc->tlock);
/*
* If we didn't read into a temporary dcache region, update the
* slot pointer table.
*/
- if (tmpdc == (struct dcache *)0)
+ if (tmpdc == NULL)
afs_indexTable[aslot] = tdc;
return tdc;
-} /*afs_UFSGetDSlot*/
+} /*afs_UFSGetDSlot */
-/*
- * afs_WriteDCache
- *
- * Description:
- * write a particular dcache entry back to its home in the
- * CacheInfo file.
+/*!
+ * Write a particular dcache entry back to its home in the
+ * CacheInfo file.
*
- * Parameters:
- * adc : Pointer to the dcache entry to write.
- * atime : If true, set the modtime on the file to the current time.
+ * \param adc Pointer to the dcache entry to write.
+ * \param atime If true, set the modtime on the file to the current time.
*
- * Environment:
+ * \note Environment:
* Must be called with the afs_xdcache lock at least read-locked,
* and dcache entry at least read-locked.
* The reference count is not changed.
*/
-afs_WriteDCache(adc, atime)
- int atime;
- register struct dcache *adc;
-
-{ /*afs_WriteDCache*/
-
- register struct osi_file *tfile;
+int
+afs_WriteDCache(register struct dcache *adc, int atime)
+{
register afs_int32 code;
- if (cacheDiskType == AFS_FCACHE_TYPE_MEM) return 0;
+ if (cacheDiskType == AFS_FCACHE_TYPE_MEM)
+ return 0;
AFS_STATCNT(afs_WriteDCache);
+ osi_Assert(WriteLocked(&afs_xdcache));
if (atime)
adc->f.modTime = osi_Time();
/*
* Seek to the right dcache slot and write the in-memory image out to disk.
*/
- code = afs_osi_Write(afs_cacheInodep, sizeof(struct fcache) * adc->index + sizeof(struct afs_fheader),
- (char *)(&adc->f), sizeof(struct fcache));
- if (code != sizeof(struct fcache)) return EIO;
+ afs_cellname_write();
+ code =
+ afs_osi_Write(afs_cacheInodep,
+ sizeof(struct fcache) * adc->index +
+ sizeof(struct afs_fheader), (char *)(&adc->f),
+ sizeof(struct fcache));
+ if (code != sizeof(struct fcache))
+ return EIO;
return 0;
-
-} /*afs_WriteDCache*/
+}
-/*
- * afs_wakeup
+/*!
+ * Wake up users of a particular file waiting for stores to take
+ * place.
*
- * Description:
- * Wake up users of a particular file waiting for stores to take
- * place.
+ * \param avc Ptr to related vcache entry.
*
- * Parameters:
- * avc : Ptr to related vcache entry.
- *
- * Environment:
+ * \note Environment:
* Nothing interesting.
*/
-
-afs_wakeup(avc)
- register struct vcache *avc;
-
-{ /*afs_wakeup*/
-
+int
+afs_wakeup(register struct vcache *avc)
+{
register int i;
register struct brequest *tb;
tb = afs_brs;
AFS_STATCNT(afs_wakeup);
for (i = 0; i < NBRS; i++, tb++) {
/* if request is valid and for this file, we've found it */
- if (tb->refCount > 0 && avc == tb->vnode) {
+ if (tb->refCount > 0 && avc == tb->vc) {
/*
* If CSafeStore is on, then we don't awaken the guy
}
}
return 0;
-
-} /*afs_wakeup*/
+}
-/*
- * afs_InitCacheFile
+/*!
+ * Given a file name and inode, set up that file to be an
+ * active member in the AFS cache. This also involves checking
+ * the usability of its data.
*
- * Description:
- * Given a file name and inode, set up that file to be an
- * active member in the AFS cache. This also involves checking
- * the usability of its data.
- *
- * Parameters:
- * afile : Name of the cache file to initialize.
- * ainode : Inode of the file.
+ * \param afile Name of the cache file to initialize.
+ * \param ainode Inode of the file.
*
- * Environment:
+ * \note Environment:
* This function is called only during initialization.
*/
-
-int afs_InitCacheFile(afile, ainode)
- ino_t ainode;
- char *afile;
-
-{ /*afs_InitCacheFile*/
-
+int
+afs_InitCacheFile(char *afile, ino_t ainode)
+{
register afs_int32 code;
#if defined(AFS_LINUX22_ENV)
struct dentry *filevp;
struct osi_file *tfile;
struct osi_stat tstat;
register struct dcache *tdc;
+#if defined(LINUX_USE_FH)
+ int max_len = sizeof(struct fid);
+#endif
AFS_STATCNT(afs_InitCacheFile);
index = afs_stats_cmperf.cacheNumEntries;
- if (index >= afs_cacheFiles) return EINVAL;
+ if (index >= afs_cacheFiles)
+ return EINVAL;
- MObtainWriteLock(&afs_xdcache,282);
- tdc = afs_GetDSlot(index, (struct dcache *)0);
+ MObtainWriteLock(&afs_xdcache, 282);
+ tdc = afs_GetDSlot(index, NULL);
ReleaseReadLock(&tdc->tlock);
MReleaseWriteLock(&afs_xdcache);
ObtainWriteLock(&tdc->lock, 621);
MObtainWriteLock(&afs_xdcache, 622);
if (afile) {
- code = gop_lookupname(afile,
- AFS_UIOSYS,
- 0,
- (struct vnode **) 0,
- &filevp);
+ code = gop_lookupname(afile, AFS_UIOSYS, 0, &filevp);
if (code) {
ReleaseWriteLock(&afs_xdcache);
ReleaseWriteLock(&tdc->lock);
* UFS file system, and just record the inode number.
*/
#ifdef AFS_LINUX22_ENV
- tdc->f.inode = VTOI(filevp->d_inode)->i_number;
+#if defined(LINUX_USE_FH)
+ tdc->f.fh_type = osi_get_fh(filevp, &tdc->f.fh, &max_len);
+#else
+ tdc->f.inode = VTOI(filevp->d_inode)->i_number;
dput(filevp);
+#endif
#else
tdc->f.inode = afs_vnodeToInumber(filevp);
-#ifdef AFS_DEC_ENV
- grele(filevp);
-#else
- AFS_RELE((struct vnode *)filevp);
-#endif
+ AFS_RELE(filevp);
#endif /* AFS_LINUX22_ENV */
- }
- else {
+ } else {
tdc->f.inode = ainode;
}
fileIsBad = 0;
- if ((tdc->f.states & DWriting) ||
- tdc->f.fid.Fid.Volume == 0) fileIsBad = 1;
+ if ((tdc->f.states & DWriting) || tdc->f.fid.Fid.Volume == 0)
+ fileIsBad = 1;
+#if defined(LINUX_USE_FH)
+ tfile = osi_UFSOpen_fh(&tdc->f.fh, tdc->f.fh_type);
+#else
tfile = osi_UFSOpen(tdc->f.inode);
+#endif
code = afs_osi_Stat(tfile, &tstat);
- if (code) osi_Panic("initcachefile stat");
+ if (code)
+ osi_Panic("initcachefile stat");
/*
* If file size doesn't match the cache info file, it's probably bad.
*/
- if (tdc->f.chunkBytes != tstat.size) fileIsBad = 1;
+ if (tdc->f.chunkBytes != tstat.size)
+ fileIsBad = 1;
tdc->f.chunkBytes = 0;
/*
* the cache info file may be incorrectly identified, and so slot
* may be bad.
*/
- if (cacheInfoModTime < tstat.mtime + 120) fileIsBad = 1;
- if (cacheInfoModTime < tdc->f.modTime + 120) fileIsBad = 1;
+ if (cacheInfoModTime < tstat.mtime + 120)
+ fileIsBad = 1;
+ if (cacheInfoModTime < tdc->f.modTime + 120)
+ fileIsBad = 1;
/* In case write through is behind, make sure cache items entry is
* at least as new as the chunk.
*/
- if (tdc->f.modTime < tstat.mtime) fileIsBad = 1;
+ if (tdc->f.modTime < tstat.mtime)
+ fileIsBad = 1;
if (fileIsBad) {
- tdc->f.fid.Fid.Volume = 0; /* not in the hash table */
+ tdc->f.fid.Fid.Volume = 0; /* not in the hash table */
if (tstat.size != 0)
osi_UFSTruncate(tfile, 0);
+ tdc->f.states &= ~(DRO|DBackup|DRW);
+ afs_DCMoveBucket(tdc, 0, 0);
/* put entry in free cache slot list */
afs_dvnextTbl[tdc->index] = afs_freeDCList;
afs_freeDCList = index;
afs_freeDCCount++;
afs_indexFlags[index] |= IFFree;
afs_indexUnique[index] = 0;
- }
- else {
+ } else {
/*
* We must put this entry in the appropriate hash tables.
* Note that i is still set from the above DCHash call
*/
code = DCHash(&tdc->f.fid, tdc->f.chunk);
- afs_dcnextTbl[tdc->index] = afs_dchashTbl[code];
+ afs_dcnextTbl[tdc->index] = afs_dchashTbl[code];
afs_dchashTbl[code] = tdc->index;
code = DVHash(&tdc->f.fid);
afs_dvnextTbl[tdc->index] = afs_dvhashTbl[code];
afs_dvhashTbl[code] = tdc->index;
- afs_AdjustSize(tdc, tstat.size); /* adjust to new size */
+ afs_AdjustSize(tdc, tstat.size); /* adjust to new size */
if (tstat.size > 0)
/* has nontrivial amt of data */
afs_indexFlags[index] |= IFEverUsed;
hset32(afs_indexCounter, tstat.atime);
}
afs_indexUnique[index] = tdc->f.fid.Fid.Unique;
- } /*File is not bad*/
+ } /*File is not bad */
osi_UFSClose(tfile);
tdc->f.states &= ~DWriting;
afs_PutDCache(tdc);
afs_stats_cmperf.cacheNumEntries++;
return 0;
-
-} /*afs_InitCacheFile*/
+}
/*Max # of struct dcache's resident at any time*/
*/
#define DDSIZE 200
-/*
- * afs_dcacheInit
+/*!
+ * Initialize dcache related variables.
+ *
+ * \param afiles
+ * \param ablocks
+ * \param aDentries
+ * \param achunk
+ * \param aflags
*
- * Description:
- * Initialize dcache related variables.
*/
-void afs_dcacheInit(int afiles, int ablocks, int aDentries, int achunk,
- int aflags)
+void
+afs_dcacheInit(int afiles, int ablocks, int aDentries, int achunk, int aflags)
{
register struct dcache *tdp;
int i;
afs_freeDCList = NULLIDX;
afs_discardDCList = NULLIDX;
afs_freeDCCount = 0;
- afs_freeDSList = (struct dcache *)0;
+ afs_freeDSList = NULL;
hzero(afs_indexCounter);
LOCK_INIT(&afs_xdcache, "afs_xdcache");
-
+
/*
* Set chunk size
*/
if (achunk) {
if (achunk < 0 || achunk > 30)
- achunk = 13; /* Use default */
+ achunk = 13; /* Use default */
AFS_SETCHUNKSIZE(achunk);
}
-
- if(!aDentries)
+
+ if (!aDentries)
aDentries = DDSIZE;
-
- if(aflags & AFSCALL_INIT_MEMCACHE) {
+
+ if (aflags & AFSCALL_INIT_MEMCACHE) {
/*
* Use a memory cache instead of a disk cache
*/
cacheDiskType = AFS_FCACHE_TYPE_MEM;
afs_cacheType = &afs_MemCacheOps;
- afiles = (afiles < aDentries) ? afiles : aDentries; /* min */
- ablocks = afiles * (AFS_FIRSTCSIZE/1024);
+ afiles = (afiles < aDentries) ? afiles : aDentries; /* min */
+ ablocks = afiles * (AFS_FIRSTCSIZE / 1024);
/* ablocks is reported in 1K blocks */
- code = afs_InitMemCache(afiles * AFS_FIRSTCSIZE, AFS_FIRSTCSIZE, aflags);
+ code = afs_InitMemCache(afiles, AFS_FIRSTCSIZE, aflags);
if (code != 0) {
printf("afsd: memory cache too large for available memory.\n");
printf("afsd: AFS files cannot be accessed.\n\n");
dcacheDisabled = 1;
afiles = ablocks = 0;
- }
- else
- printf("Memory cache: Allocating %d dcache entries...", aDentries);
+ } else
+ printf("Memory cache: Allocating %d dcache entries...",
+ aDentries);
} else {
cacheDiskType = AFS_FCACHE_TYPE_UFS;
afs_cacheType = &afs_UfsCacheOps;
}
- if (aDentries > 512)
+ if (aDentries > 512)
afs_dhashsize = 2048;
/* initialize hash tables */
- afs_dvhashTbl = (afs_int32 *) afs_osi_Alloc(afs_dhashsize * sizeof(afs_int32));
- afs_dchashTbl = (afs_int32 *) afs_osi_Alloc(afs_dhashsize * sizeof(afs_int32));
- for(i=0;i< afs_dhashsize;i++) {
+ afs_dvhashTbl =
+ (afs_int32 *) afs_osi_Alloc(afs_dhashsize * sizeof(afs_int32));
+ afs_dchashTbl =
+ (afs_int32 *) afs_osi_Alloc(afs_dhashsize * sizeof(afs_int32));
+ for (i = 0; i < afs_dhashsize; i++) {
afs_dvhashTbl[i] = NULLIDX;
afs_dchashTbl[i] = NULLIDX;
}
afs_dvnextTbl = (afs_int32 *) afs_osi_Alloc(afiles * sizeof(afs_int32));
afs_dcnextTbl = (afs_int32 *) afs_osi_Alloc(afiles * sizeof(afs_int32));
- for(i=0;i< afiles;i++) {
+ for (i = 0; i < afiles; i++) {
afs_dvnextTbl[i] = NULLIDX;
afs_dcnextTbl[i] = NULLIDX;
}
-
+
/* Allocate and zero the pointer array to the dcache entries */
afs_indexTable = (struct dcache **)
afs_osi_Alloc(sizeof(struct dcache *) * afiles);
memset((char *)afs_indexTable, 0, sizeof(struct dcache *) * afiles);
- afs_indexTimes = (afs_hyper_t *) afs_osi_Alloc(afiles * sizeof(afs_hyper_t));
+ afs_indexTimes =
+ (afs_hyper_t *) afs_osi_Alloc(afiles * sizeof(afs_hyper_t));
memset((char *)afs_indexTimes, 0, afiles * sizeof(afs_hyper_t));
- afs_indexUnique = (afs_int32 *) afs_osi_Alloc(afiles * sizeof(afs_uint32));
+ afs_indexUnique =
+ (afs_int32 *) afs_osi_Alloc(afiles * sizeof(afs_uint32));
memset((char *)afs_indexUnique, 0, afiles * sizeof(afs_uint32));
afs_indexFlags = (u_char *) afs_osi_Alloc(afiles * sizeof(u_char));
memset((char *)afs_indexFlags, 0, afiles * sizeof(char));
-
+
/* Allocate and thread the struct dcache entries themselves */
tdp = afs_Initial_freeDSList =
- (struct dcache *) afs_osi_Alloc(aDentries * sizeof(struct dcache));
+ (struct dcache *)afs_osi_Alloc(aDentries * sizeof(struct dcache));
memset((char *)tdp, 0, aDentries * sizeof(struct dcache));
-#ifdef AFS_AIX32_ENV
- pin((char *)afs_indexTable, sizeof(struct dcache *) * afiles);/* XXX */
- pin((char *)afs_indexTimes, sizeof(afs_hyper_t) * afiles); /* XXX */
- pin((char *)afs_indexFlags, sizeof(char) * afiles); /* XXX */
- pin((char *)afs_indexUnique, sizeof(afs_int32) * afiles); /* XXX */
- pin((char *)tdp, aDentries * sizeof(struct dcache)); /* XXX */
- pin((char *)afs_dvhashTbl, sizeof(afs_int32) * afs_dhashsize); /* XXX */
- pin((char *)afs_dchashTbl, sizeof(afs_int32) * afs_dhashsize); /* XXX */
- pin((char *)afs_dcnextTbl, sizeof(afs_int32) * afiles); /* XXX */
- pin((char *)afs_dvnextTbl, sizeof(afs_int32) * afiles); /* XXX */
+#ifdef KERNEL_HAVE_PIN
+ pin((char *)afs_indexTable, sizeof(struct dcache *) * afiles); /* XXX */
+ pin((char *)afs_indexTimes, sizeof(afs_hyper_t) * afiles); /* XXX */
+ pin((char *)afs_indexFlags, sizeof(char) * afiles); /* XXX */
+ pin((char *)afs_indexUnique, sizeof(afs_int32) * afiles); /* XXX */
+ pin((char *)tdp, aDentries * sizeof(struct dcache)); /* XXX */
+ pin((char *)afs_dvhashTbl, sizeof(afs_int32) * afs_dhashsize); /* XXX */
+ pin((char *)afs_dchashTbl, sizeof(afs_int32) * afs_dhashsize); /* XXX */
+ pin((char *)afs_dcnextTbl, sizeof(afs_int32) * afiles); /* XXX */
+ pin((char *)afs_dvnextTbl, sizeof(afs_int32) * afiles); /* XXX */
#endif
afs_freeDSList = &tdp[0];
- for(i=0; i < aDentries-1; i++) {
- tdp[i].lruq.next = (struct afs_q *) (&tdp[i+1]);
+ for (i = 0; i < aDentries - 1; i++) {
+ tdp[i].lruq.next = (struct afs_q *)(&tdp[i + 1]);
+ AFS_RWLOCK_INIT(&tdp[i].lock, "dcache lock");
+ AFS_RWLOCK_INIT(&tdp[i].tlock, "dcache tlock");
+ AFS_RWLOCK_INIT(&tdp[i].mflock, "dcache flock");
}
- tdp[aDentries-1].lruq.next = (struct afs_q *) 0;
+ tdp[aDentries - 1].lruq.next = (struct afs_q *)0;
+ AFS_RWLOCK_INIT(&tdp[aDentries - 1].lock, "dcache lock");
+ AFS_RWLOCK_INIT(&tdp[aDentries - 1].tlock, "dcache tlock");
+ AFS_RWLOCK_INIT(&tdp[aDentries - 1].mflock, "dcache flock");
- afs_stats_cmperf.cacheBlocksOrig = afs_stats_cmperf.cacheBlocksTotal = afs_cacheBlocks = ablocks;
+ afs_stats_cmperf.cacheBlocksOrig = afs_stats_cmperf.cacheBlocksTotal =
+ afs_cacheBlocks = ablocks;
afs_ComputeCacheParms(); /* compute parms based on cache size */
afs_dcentries = aDentries;
afs_blocksUsed = 0;
+ afs_stats_cmperf.cacheBucket0_Discarded =
+ afs_stats_cmperf.cacheBucket1_Discarded =
+ afs_stats_cmperf.cacheBucket2_Discarded = 0;
+ afs_DCSizeInit();
QInit(&afs_DLRU);
}
-/*
- * shutdown_dcache
+/*!
+ * Shuts down the cache.
*
*/
-void shutdown_dcache(void)
+void
+shutdown_dcache(void)
{
int i;
afs_osi_Free(afs_indexTimes, afs_cacheFiles * sizeof(afs_hyper_t));
afs_osi_Free(afs_indexUnique, afs_cacheFiles * sizeof(afs_uint32));
afs_osi_Free(afs_indexFlags, afs_cacheFiles * sizeof(u_char));
- afs_osi_Free(afs_Initial_freeDSList, afs_dcentries * sizeof(struct dcache));
-#ifdef AFS_AIX32_ENV
+ afs_osi_Free(afs_Initial_freeDSList,
+ afs_dcentries * sizeof(struct dcache));
+#ifdef KERNEL_HAVE_PIN
unpin((char *)afs_dcnextTbl, afs_cacheFiles * sizeof(afs_int32));
unpin((char *)afs_dvnextTbl, afs_cacheFiles * sizeof(afs_int32));
unpin((char *)afs_indexTable, afs_cacheFiles * sizeof(struct dcache *));
unpin((char *)afs_indexTimes, afs_cacheFiles * sizeof(afs_hyper_t));
unpin((char *)afs_indexUnique, afs_cacheFiles * sizeof(afs_uint32));
- unpin((u_char *)afs_indexFlags, afs_cacheFiles * sizeof(u_char));
+ unpin((u_char *) afs_indexFlags, afs_cacheFiles * sizeof(u_char));
unpin(afs_Initial_freeDSList, afs_dcentries * sizeof(struct dcache));
#endif
- for(i=0;i< afs_dhashsize;i++) {
+ for (i = 0; i < afs_dhashsize; i++) {
afs_dvhashTbl[i] = NULLIDX;
afs_dchashTbl[i] = NULLIDX;
}
+ afs_osi_Free(afs_dvhashTbl, afs_dhashsize * sizeof(afs_int32));
+ afs_osi_Free(afs_dchashTbl, afs_dhashsize * sizeof(afs_int32));
afs_blocksUsed = afs_dcentries = 0;
+ afs_stats_cmperf.cacheBucket0_Discarded =
+ afs_stats_cmperf.cacheBucket1_Discarded =
+ afs_stats_cmperf.cacheBucket2_Discarded = 0;
hzero(afs_indexCounter);
- afs_freeDCCount = 0;
+ afs_freeDCCount = 0;
afs_freeDCList = NULLIDX;
afs_discardDCList = NULLIDX;
afs_freeDSList = afs_Initial_freeDSList = 0;
QInit(&afs_DLRU);
}
+
+#if defined(AFS_DISCON_ENV)
+
+/*!
+ * Make a shadow copy of a dir's dcaches. It's used for disconnected
+ * operations like remove/create/rename to keep the original directory data.
+ * On reconnection, we can diff the original data with the server and get the
+ * server changes and with the local data to get the local changes.
+ *
+ * \param avc The dir vnode.
+ *
+ * \return 0 for success.
+ *
+ * \note The only lock allowed to be set is the dir's vcache entry, and it
+ * must be set in write mode.
+ * \note The vcache entry must be write locked.
+ */
+int afs_MakeShadowDir(struct vcache *avc)
+{
+ int j, i, index, code, ret_code = 0, offset, trans_size, block;
+ struct dcache *tdc, *new_dc = NULL;
+ struct osi_file *tfile_src, *tfile_dst;
+ struct VenusFid shadow_fid;
+ char *data;
+ int lock_held = 0;
+
+ /* Is this a dir? */
+ if (vType(avc) != VDIR)
+ return ENOTDIR;
+
+ /* Generate a fid for the shadow dir. */
+ shadow_fid.Cell = avc->fid.Cell;
+ shadow_fid.Fid.Volume = avc->fid.Fid.Volume;
+ afs_GenShadowFid(&shadow_fid);
+
+ /* For each dcache, do copy it into a new fresh one. */
+ i = DVHash(&avc->fid);
+ for (index = afs_dvhashTbl[i]; index != NULLIDX; index = i) {
+ /* Making sure that this isn't going to get locked twice. */
+ if (!lock_held) {
+ /* XXX: Moved it from outside of the loop.
+ * Maybe it's not quite okay because of the use of
+ * dvhashTbl (once) in the for statement.
+ */
+ ObtainWriteLock(&afs_xdcache, 716);
+ lock_held = 1;
+ }
+
+ i = afs_dvnextTbl[index];
+ if (afs_indexUnique[index] == avc->fid.Fid.Unique) {
+ tdc = afs_GetDSlot(index, NULL);
+
+ ReleaseReadLock(&tdc->tlock);
+
+ if (!FidCmp(&tdc->f.fid, &avc->fid)) {
+
+ /* Got a dir's dcache. */
+ lock_held = 0;
+
+ /* Get a fresh dcache. */
+ new_dc = afs_AllocDCache(avc, 0, 0, &shadow_fid);
+
+ /* Unlock hash for now. Don't need it during operations on the
+ * dcache. Oh, and we can't use it because of the locking
+ * hierarchy...
+ */
+ /* XXX: So much for lock ierarchy, the afs_AllocDCache doesn't
+ * respect it.
+ */
+ //ReleaseWriteLock(&afs_xdcache);
+
+ ObtainReadLock(&tdc->lock);
+
+ /* Set up the new fid. */
+ /* Copy interesting data from original dir dcache. */
+ new_dc->mflags = tdc->mflags;
+ new_dc->dflags = tdc->dflags;
+ new_dc->f.modTime = tdc->f.modTime;
+ new_dc->f.versionNo = tdc->f.versionNo;
+ new_dc->f.states = tdc->f.states;
+ new_dc->f.chunk= tdc->f.chunk;
+ new_dc->f.chunkBytes = tdc->f.chunkBytes;
+
+ /*
+ * Now add to the two hash chains - note that i is still set
+ * from the above DCHash call.
+ */
+ //ObtainWriteLock(&afs_xdcache, 713);
+
+ j = DCHash(&shadow_fid, 0);
+ afs_dcnextTbl[new_dc->index] = afs_dchashTbl[j];
+ afs_dchashTbl[j] = new_dc->index;
+
+ j = DVHash(&shadow_fid);
+ afs_dvnextTbl[new_dc->index] = afs_dvhashTbl[j];
+ afs_dvhashTbl[j] = new_dc->index;
+ afs_MaybeWakeupTruncateDaemon();
+
+ ReleaseWriteLock(&afs_xdcache);
+
+ /* Make sure and flush dir buffers back into the disk cache */
+ DFlushDCache(tdc);
+
+ /* Alloc a 4k block. */
+ data = (char *) afs_osi_Alloc(4096);
+ if (!data) {
+ printf("afs_MakeShadowDir: could not alloc data\n");
+ ret_code = ENOMEM;
+ goto done;
+ }
+
+ /* Open the files. */
+ tfile_src = afs_CFileOpen(tdc->f.inode);
+ tfile_dst = afs_CFileOpen(new_dc->f.inode);
+
+ /* Init no of blocks to be read and offset. */
+ block = (tdc->f.chunkBytes / 4096);
+ offset = 0;
+
+ /* And now copy dir dcache data into this dcache,
+ * 4k at a time.
+ */
+ while (block >= 0) {
+
+ /* Last chunk might have less bytes to transfer. */
+ if (!block) {
+ /* Last block. */
+ trans_size = (tdc->f.chunkBytes % 4096);
+ if (!trans_size)
+ /* An exact no of 4k blocks. */
+ break;
+ } else
+ trans_size = 4096;
+
+ /* Read a chunk from the dcache. */
+ code = afs_CFileRead(tfile_src, offset, data, trans_size);
+ if (code < trans_size) {
+ /* Can't access file, stop doing stuff and return error. */
+ ret_code = EIO;
+ break;
+ }
+
+ /* Write it to the new dcache. */
+ code = afs_CFileWrite(tfile_dst, offset, data, trans_size);
+ if (code < trans_size) {
+ ret_code = EIO;
+ break;
+ }
+
+ block--;
+ offset += 4096;
+ } /* while (block) */
+
+ afs_CFileClose(tfile_dst);
+ afs_CFileClose(tfile_src);
+
+ afs_osi_Free(data, 4096);
+
+ ReleaseWriteLock(&new_dc->lock);
+ ReleaseReadLock(&tdc->lock);
+
+ afs_PutDCache(new_dc);
+ } /* if dcache fid match */
+ afs_PutDCache(tdc);
+ } /* if unuiquifier match */
+ }
+done:
+ if (lock_held)
+ ReleaseWriteLock(&afs_xdcache);
+
+ if (!ret_code) {
+ if (!avc->ddirty_flags) {
+ ObtainWriteLock(&afs_DDirtyVCListLock, 763);
+ AFS_DISCON_ADD_DIRTY(avc, 1);
+ ReleaseWriteLock(&afs_DDirtyVCListLock);
+ }
+ avc->shVnode = shadow_fid.Fid.Vnode;
+ avc->shUnique = shadow_fid.Fid.Unique;
+ avc->ddirty_flags |= VDisconShadowed;
+ }
+
+ return ret_code;
+}
+
+/*!
+ * Delete the dcaches of a shadow dir.
+ *
+ * \param avc The vcache containing the shadow fid.
+ *
+ * \note avc must be write locked.
+ */
+void afs_DeleteShadowDir(struct vcache *avc)
+{
+ struct dcache *tdc;
+ struct VenusFid shadow_fid;
+
+ shadow_fid.Cell = avc->fid.Cell;
+ shadow_fid.Fid.Volume = avc->fid.Fid.Volume;
+ shadow_fid.Fid.Vnode = avc->shVnode;
+ shadow_fid.Fid.Unique = avc->shUnique;
+
+ tdc = afs_FindDCacheByFid(&shadow_fid);
+ if (tdc) {
+ afs_HashOutDCache(tdc, 1);
+ afs_DiscardDCache(tdc);
+ afs_PutDCache(tdc);
+ }
+ /* Remove shadowed dir flag. */
+ avc->ddirty_flags &= ~VDisconShadowed;
+}
+#endif
git://git.openafs.org / openafs.git / blobdiff