*/
#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 gathering code */
-#include "../afs/afs_cbqueue.h"
+#ifdef AFS_AIX51_ENV
+#define __FULL_PROTO
+#include <sys/sleep.h>
+#endif
+
+#include "afs/sysincludes.h" /* Standard vendor system headers */
+#include "afsincludes.h" /* Afs-based standard headers */
+#include "afs/afs_stats.h" /* statistics gathering code */
+#include "afs/afs_cbqueue.h"
#ifdef AFS_AIX_ENV
#include <sys/adspace.h> /* for vm_att(), vm_det() */
#endif
-
+#if defined(AFS_CACHE_BYPASS)
+#include "afs/afs_bypasscache.h"
+#endif// defined(AFS_CACHE_BYPASS)
/* background request queue size */
afs_lock_t afs_xbrs; /* lock for brs */
static int brsInit = 0;
short afs_brsWaiters = 0; /* number of users waiting for brs buffers */
short afs_brsDaemons = 0; /* number of daemons waiting for brs requests */
-struct brequest afs_brs[NBRS]; /* request structures */
+struct brequest afs_brs[NBRS]; /* request structures */
struct afs_osi_WaitHandle AFS_WaitHandler, AFS_CSWaitHandler;
+static int afs_brs_count = 0; /* request counter, to service reqs in order */
-static int rxepoch_checked=0;
+static int rxepoch_checked = 0;
#define afs_CheckRXEpoch() {if (rxepoch_checked == 0 && rxkad_EpochWasSet) { \
rxepoch_checked = 1; afs_GCUserData(/* force flag */ 1); } }
-extern char afs_rootVolumeName[];
-extern struct vcache *afs_globalVp;
-extern struct VenusFid afs_rootFid;
-extern struct osi_dev cacheDev;
-extern char *afs_indexFlags;
-extern afs_rwlock_t afs_xvcache;
-extern struct afs_exporter *afs_nfsexporter;
-extern int cacheDiskType;
-extern int afs_BumpBase();
-extern void afs_CheckCallbacks();
-
/* PAG garbage collection */
/* We induce a compile error if param.h does not define AFS_GCPAGS */
-afs_int32 afs_gcpags=AFS_GCPAGS;
-afs_int32 afs_gcpags_procsize;
+afs_int32 afs_gcpags = AFS_GCPAGS;
+afs_int32 afs_gcpags_procsize = 0;
afs_int32 afs_CheckServerDaemonStarted = 0;
-afs_int32 PROBE_INTERVAL=180; /* default to 3 min */
+#ifndef DEFAULT_PROBE_INTERVAL
+#define DEFAULT_PROBE_INTERVAL 30 /* default to 3 min */
+#endif
+afs_int32 afs_probe_interval = DEFAULT_PROBE_INTERVAL;
+afs_int32 afs_probe_all_interval = 600;
+afs_int32 afs_nat_probe_interval = 60;
+afs_int32 afs_preCache = 0;
-#define PROBE_WAIT() (1000 * (PROBE_INTERVAL - ((afs_random() & 0x7fffffff) \
- % (PROBE_INTERVAL/2))))
+#define PROBE_WAIT() (1000 * (afs_probe_interval - ((afs_random() & 0x7fffffff) \
+ % (afs_probe_interval/2))))
+
+void
+afs_SetCheckServerNATmode(int isnat)
+{
+ static afs_int32 old_intvl, old_all_intvl;
+ static int wasnat;
+
+ if (isnat && !wasnat) {
+ old_intvl = afs_probe_interval;
+ old_all_intvl = afs_probe_all_interval;
+ afs_probe_interval = afs_nat_probe_interval;
+ afs_probe_all_interval = afs_nat_probe_interval;
+ afs_osi_CancelWait(&AFS_CSWaitHandler);
+ } else if (!isnat && wasnat) {
+ afs_probe_interval = old_intvl;
+ afs_probe_all_interval = old_all_intvl;
+ }
+ wasnat = isnat;
+}
-afs_CheckServerDaemon()
+void
+afs_CheckServerDaemon(void)
{
afs_int32 now, delay, lastCheck, last10MinCheck;
afs_CheckServerDaemonStarted = 1;
- while (afs_initState < 101) afs_osi_Sleep(&afs_initState);
- afs_osi_Wait(PROBE_WAIT(), &AFS_CSWaitHandler, 0);
-
+ while (afs_initState < 101)
+ afs_osi_Sleep(&afs_initState);
+ afs_osi_Wait(PROBE_WAIT(), &AFS_CSWaitHandler, 0);
+
last10MinCheck = lastCheck = osi_Time();
- while ( 1 ) {
+ while (1) {
if (afs_termState == AFSOP_STOP_CS) {
afs_termState = AFSOP_STOP_BKG;
afs_osi_Wakeup(&afs_termState);
}
now = osi_Time();
- if (PROBE_INTERVAL + lastCheck <= now) {
- afs_CheckServers(1, (struct cell *) 0); /* check down servers */
+ if (afs_probe_interval + lastCheck <= now) {
+ afs_CheckServers(1, NULL); /* check down servers */
lastCheck = now = osi_Time();
}
- if (600 + last10MinCheck <= now) {
- afs_Trace1(afs_iclSetp, CM_TRACE_PROBEUP, ICL_TYPE_INT32, 600);
- afs_CheckServers(0, (struct cell *) 0);
+ if (afs_probe_all_interval + last10MinCheck <= now) {
+ afs_Trace1(afs_iclSetp, CM_TRACE_PROBEUP, ICL_TYPE_INT32, afs_probe_all_interval);
+ afs_CheckServers(0, NULL);
last10MinCheck = now = osi_Time();
}
/* shutdown check. */
}
/* Compute time to next probe. */
- delay = PROBE_INTERVAL + lastCheck;
- if (delay > 600 + last10MinCheck)
- delay = 600 + last10MinCheck;
+ delay = afs_probe_interval + lastCheck;
+ if (delay > afs_probe_all_interval + last10MinCheck)
+ delay = afs_probe_all_interval + last10MinCheck;
delay -= now;
if (delay < 1)
delay = 1;
- afs_osi_Wait(delay * 1000, &AFS_CSWaitHandler, 0);
+ afs_osi_Wait(delay * 1000, &AFS_CSWaitHandler, 0);
}
afs_CheckServerDaemonStarted = 0;
}
-void afs_Daemon() {
+extern int vfs_context_ref;
+
+void
+afs_Daemon(void)
+{
afs_int32 code;
- extern struct afs_exporter *root_exported;
struct afs_exporter *exporter;
afs_int32 now;
afs_int32 last3MinCheck, last10MinCheck, last60MinCheck, lastNMinCheck;
char cs_warned = 0;
AFS_STATCNT(afs_Daemon);
- last1MinCheck = last3MinCheck = last60MinCheck = last10MinCheck = lastNMinCheck = 0;
+ last1MinCheck = last3MinCheck = last60MinCheck = last10MinCheck =
+ lastNMinCheck = 0;
afs_rootFid.Fid.Volume = 0;
- while (afs_initState < 101) afs_osi_Sleep(&afs_initState);
-
+ while (afs_initState < 101)
+ afs_osi_Sleep(&afs_initState);
+
+#ifdef AFS_DARWIN80_ENV
+ if (afs_osi_ctxtp_initialized)
+ osi_Panic("vfs context already initialized");
+ while (afs_osi_ctxtp && vfs_context_ref)
+ afs_osi_Sleep(&afs_osi_ctxtp);
+ if (afs_osi_ctxtp && !vfs_context_ref)
+ vfs_context_rele(afs_osi_ctxtp);
+ afs_osi_ctxtp = vfs_context_create(NULL);
+ afs_osi_ctxtp_initialized = 1;
+#endif
now = osi_Time();
lastCBSlotBump = now;
/* when a lot of clients are booted simultaneously, they develop
* annoying synchronous VL server bashing behaviors. So we stagger them.
*/
- last1MinCheck = now + ((afs_random() & 0x7fffffff) % 60); /* an extra 30 */
+ last1MinCheck = now + ((afs_random() & 0x7fffffff) % 60); /* an extra 30 */
last3MinCheck = now - 90 + ((afs_random() & 0x7fffffff) % 180);
last60MinCheck = now - 1800 + ((afs_random() & 0x7fffffff) % 3600);
last10MinCheck = now - 300 + ((afs_random() & 0x7fffffff) % 600);
lastNMinCheck = now - 90 + ((afs_random() & 0x7fffffff) % 180);
/* start off with afs_initState >= 101 (basic init done) */
- while(1) {
- afs_CheckCallbacks(20); /* unstat anything which will expire soon */
-
+ while (1) {
+ afs_CheckCallbacks(20); /* unstat anything which will expire soon */
+
/* things to do every 20 seconds or less - required by protocol spec */
- if (afs_nfsexporter)
+ if (afs_nfsexporter)
afs_FlushActiveVcaches(0); /* flush NFS writes */
- afs_FlushVCBs(1); /* flush queued callbacks */
+ afs_FlushVCBs(1); /* flush queued callbacks */
afs_MaybeWakeupTruncateDaemon(); /* free cache space if have too */
- rx_CheckPackets(); /* Does RX need more packets? */
-#if defined(AFS_AIX32_ENV) || defined(AFS_HPUX_ENV)
- /*
- * Hack: We always want to make sure there are plenty free
- * entries in the small free pool so that we don't have to
- * worry about rx (with disabled interrupts) to have to call
- * malloc). So we do the dummy call below...
- */
- if (((afs_stats_cmperf.SmallBlocksAlloced - afs_stats_cmperf.SmallBlocksActive)
- <= AFS_SALLOC_LOW_WATER))
- osi_FreeSmallSpace(osi_AllocSmallSpace(AFS_SMALLOCSIZ));
- if (((afs_stats_cmperf.MediumBlocksAlloced - afs_stats_cmperf.MediumBlocksActive)
- <= AFS_MALLOC_LOW_WATER+50))
- osi_AllocMoreMSpace(AFS_MALLOC_LOW_WATER * 2);
-#endif
-
+ rx_CheckPackets(); /* Does RX need more packets? */
+
now = osi_Time();
- if (lastCBSlotBump + CBHTSLOTLEN < now) { /* pretty time-dependant */
+ if (lastCBSlotBump + CBHTSLOTLEN < now) { /* pretty time-dependant */
lastCBSlotBump = now;
if (afs_BumpBase()) {
- afs_CheckCallbacks(20); /* unstat anything which will expire soon */
+ afs_CheckCallbacks(20); /* unstat anything which will expire soon */
}
}
-
+
if (last1MinCheck + 60 < now) {
/* things to do every minute */
- DFlush(); /* write out dir buffers */
+ DFlush(); /* write out dir buffers */
afs_WriteThroughDSlots(); /* write through cacheinfo entries */
- afs_FlushActiveVcaches(1);/* keep flocks held & flush nfs writes */
+ ObtainWriteLock(&afs_xvcache, 736);
+ afs_FlushReclaimedVcaches();
+ ReleaseWriteLock(&afs_xvcache);
+ afs_FlushActiveVcaches(1); /* keep flocks held & flush nfs writes */
+#if 0
+#ifdef AFS_DISCON_ENV
+ afs_StoreDirtyVcaches();
+#endif
+#endif
afs_CheckRXEpoch();
last1MinCheck = now;
}
-
+
if (last3MinCheck + 180 < now) {
afs_CheckTokenCache(); /* check for access cache resets due to expired
- tickets */
+ * tickets */
last3MinCheck = now;
}
if (!afs_CheckServerDaemonStarted) {
cs_warned = 1;
printf("Please install afsd with check server daemon.\n");
}
- if (lastNMinCheck + PROBE_INTERVAL < now) {
+ if (lastNMinCheck + afs_probe_interval < now) {
/* only check down servers */
- afs_CheckServers(1, (struct cell *) 0);
+ afs_CheckServers(1, NULL);
lastNMinCheck = now;
}
}
if (last10MinCheck + 600 < now) {
-#ifdef AFS_USERSPACE_IP_ADDR
+#ifdef AFS_USERSPACE_IP_ADDR
extern int rxi_GetcbiInfo(void);
#endif
- afs_Trace1(afs_iclSetp, CM_TRACE_PROBEUP,
- ICL_TYPE_INT32, 600);
-#ifdef AFS_USERSPACE_IP_ADDR
- if (rxi_GetcbiInfo()) { /* addresses changed from last time */
+ afs_Trace1(afs_iclSetp, CM_TRACE_PROBEUP, ICL_TYPE_INT32, 600);
+#ifdef AFS_USERSPACE_IP_ADDR
+ if (rxi_GetcbiInfo()) { /* addresses changed from last time */
afs_FlushCBs();
}
-#else /* AFS_USERSPACE_IP_ADDR */
- if (rxi_GetIFInfo()) { /* addresses changed from last time */
+#else /* AFS_USERSPACE_IP_ADDR */
+ if (rxi_GetIFInfo()) { /* addresses changed from last time */
afs_FlushCBs();
}
#endif /* else AFS_USERSPACE_IP_ADDR */
if (!afs_CheckServerDaemonStarted)
- afs_CheckServers(0, (struct cell *) 0);
- afs_GCUserData(0); /* gc old conns */
+ afs_CheckServers(0, NULL);
+ afs_GCUserData(0); /* gc old conns */
/* This is probably the wrong way of doing GC for the various exporters but it will suffice for a while */
- for (exporter = root_exported; exporter; exporter = exporter->exp_next) {
- (void) EXP_GC(exporter, 0); /* Generalize params */
+ for (exporter = root_exported; exporter;
+ exporter = exporter->exp_next) {
+ (void)EXP_GC(exporter, 0); /* Generalize params */
}
{
- static int cnt=0;
+ static int cnt = 0;
if (++cnt < 12) {
afs_CheckVolumeNames(AFS_VOLCHECK_EXPIRED |
AFS_VOLCHECK_BUSY);
last10MinCheck = now;
}
if (last60MinCheck + 3600 < now) {
- afs_Trace1(afs_iclSetp, CM_TRACE_PROBEVOLUME,
- ICL_TYPE_INT32, 3600);
+ afs_Trace1(afs_iclSetp, CM_TRACE_PROBEVOLUME, ICL_TYPE_INT32,
+ 3600);
afs_CheckRootVolume();
#if AFS_GCPAGS
if (afs_gcpags == AFS_GCPAGS_OK) {
- afs_int32 didany;
+ afs_int32 didany;
afs_GCPAGs(&didany);
}
#endif
}
if (afs_initState < 300) { /* while things ain't rosy */
code = afs_CheckRootVolume();
- if (code == 0) afs_initState = 300; /* succeeded */
- if (afs_initState < 200) afs_initState = 200; /* tried once */
+ if (code == 0)
+ afs_initState = 300; /* succeeded */
+ if (afs_initState < 200)
+ afs_initState = 200; /* tried once */
afs_osi_Wakeup(&afs_initState);
}
-
+
/* 18285 is because we're trying to divide evenly into 128, that is,
* CBSlotLen, while staying just under 20 seconds. If CBSlotLen
* changes, should probably change this interval, too.
* might not want to wait the entire interval */
now = 18285 - (osi_Time() - now);
if (now > 0) {
- afs_osi_Wait(now, &AFS_WaitHandler, 0);
+ afs_osi_Wait(now, &AFS_WaitHandler, 0);
}
-
+
if (afs_termState == AFSOP_STOP_AFS) {
if (afs_CheckServerDaemonStarted)
afs_termState = AFSOP_STOP_CS;
}
}
-afs_CheckRootVolume () {
+int
+afs_CheckRootVolume(void)
+{
char rootVolName[32];
- register struct volume *tvp;
+ struct volume *tvp = NULL;
int usingDynroot = afs_GetDynrootEnable();
+ int localcell;
AFS_STATCNT(afs_CheckRootVolume);
if (*afs_rootVolumeName == 0) {
strcpy(rootVolName, "root.afs");
- }
- else {
+ } else {
strcpy(rootVolName, afs_rootVolumeName);
}
+
if (usingDynroot) {
afs_GetDynrootFid(&afs_rootFid);
- tvp = afs_GetVolume(&afs_rootFid, (struct vrequest *) 0, READ_LOCK);
+ tvp = afs_GetVolume(&afs_rootFid, NULL, READ_LOCK);
} else {
- tvp = afs_GetVolumeByName(rootVolName, LOCALCELL, 1, (struct vrequest *) 0, READ_LOCK);
- }
- if (!tvp) {
- char buf[128];
- int len = strlen(rootVolName);
-
- if ((len < 9) || strcmp(&rootVolName[len - 9], ".readonly")) {
- strcpy(buf, rootVolName);
- afs_strcat(buf, ".readonly");
- tvp = afs_GetVolumeByName(buf, LOCALCELL, 1, (struct vrequest *) 0, READ_LOCK);
+ struct cell *lc = afs_GetPrimaryCell(READ_LOCK);
+
+ if (!lc)
+ return ENOENT;
+ localcell = lc->cellNum;
+ afs_PutCell(lc, READ_LOCK);
+ tvp = afs_GetVolumeByName(rootVolName, localcell, 1, NULL, READ_LOCK);
+ if (!tvp) {
+ char buf[128];
+ int len = strlen(rootVolName);
+
+ if ((len < 9) || strcmp(&rootVolName[len - 9], ".readonly")) {
+ strcpy(buf, rootVolName);
+ afs_strcat(buf, ".readonly");
+ tvp = afs_GetVolumeByName(buf, localcell, 1, NULL, READ_LOCK);
+ }
}
- }
- if (tvp) {
- if (!usingDynroot) {
- int volid = (tvp->roVol? tvp->roVol : tvp->volume);
- afs_rootFid.Cell = LOCALCELL;
+ if (tvp) {
+ int volid = (tvp->roVol ? tvp->roVol : tvp->volume);
+ afs_rootFid.Cell = localcell;
if (afs_rootFid.Fid.Volume && afs_rootFid.Fid.Volume != volid
&& afs_globalVp) {
/* If we had a root fid before and it changed location we reset
* count to zero and fs checkv is executed when the current
* directory is /afs.
*/
+#ifdef AFS_LINUX20_ENV
+ {
+ struct vrequest treq;
+ struct vattr vattr;
+ cred_t *credp;
+ struct dentry *dp;
+ struct vcache *vcp;
+
+ afs_rootFid.Fid.Volume = volid;
+ afs_rootFid.Fid.Vnode = 1;
+ afs_rootFid.Fid.Unique = 1;
+
+ credp = crref();
+ if (afs_InitReq(&treq, credp))
+ goto out;
+ vcp = afs_GetVCache(&afs_rootFid, &treq, NULL, NULL);
+ if (!vcp)
+ goto out;
+ afs_getattr(vcp, &vattr, credp);
+ afs_fill_inode(AFSTOV(vcp), &vattr);
+
+ dp = d_find_alias(AFSTOV(afs_globalVp));
+
+#if defined(AFS_LINUX24_ENV)
+ spin_lock(&dcache_lock);
+#if defined(AFS_LINUX26_ENV)
+ spin_lock(&dp->d_lock);
+#endif
+#endif
+ list_del_init(&dp->d_alias);
+ list_add(&dp->d_alias, &(AFSTOV(vcp)->i_dentry));
+ dp->d_inode = AFSTOV(vcp);
+#if defined(AFS_LINUX24_ENV)
+#if defined(AFS_LINUX26_ENV)
+ spin_unlock(&dp->d_lock);
+#endif
+ spin_unlock(&dcache_lock);
+#endif
+ dput(dp);
+
+ AFS_FAST_RELE(afs_globalVp);
+ afs_globalVp = vcp;
+ out:
+ crfree(credp);
+ }
+#else
+#ifdef AFS_DARWIN80_ENV
+ afs_PutVCache(afs_globalVp);
+#else
AFS_FAST_RELE(afs_globalVp);
+#endif
afs_globalVp = 0;
+#endif
}
afs_rootFid.Fid.Volume = volid;
afs_rootFid.Fid.Vnode = 1;
afs_rootFid.Fid.Unique = 1;
}
- afs_initState = 300; /* won */
+ }
+ if (tvp) {
+ afs_initState = 300; /* won */
afs_osi_Wakeup(&afs_initState);
afs_PutVolume(tvp, READ_LOCK);
}
-#ifdef AFS_DEC_ENV
-/* This is to make sure that we update the root gnode */
-/* every time root volume gets released */
- {
- extern struct vfs *afs_globalVFS;
- extern int afs_root();
- struct gnode *rootgp;
- struct mount *mp;
- int code;
-
- /* Only do this if afs_globalVFS is properly set due to race conditions
- this routine could be called before the gfs_mount is performed!
- Furthermore, afs_root (called below) *waits* until
- initState >= 200, so we don't try this until we've gotten
- at least that far */
- if (afs_globalVFS && afs_initState >= 200) {
- if (code = afs_root(afs_globalVFS, &rootgp))
- return code;
- mp = (struct mount *) afs_globalVFS->vfs_data ;
- mp->m_rootgp = gget(mp, 0, 0, (char *)rootgp);
- afs_unlock(mp->m_rootgp); /* unlock basic gnode */
- afs_vrele((struct vcache *) rootgp); /* zap afs_root's vnode hold */
- }
- }
-#endif
- if (afs_rootFid.Fid.Volume) return 0;
- else return ENOENT;
+ if (afs_rootFid.Fid.Volume)
+ return 0;
+ else
+ return ENOENT;
}
-/* parm 0 is the pathname, parm 1 to the fetch is the chunk number */
-void BPath(ab)
- register struct brequest *ab; {
- register struct dcache *tdc;
- struct vcache *tvc;
- struct vnode *tvn;
+/* ptr_parm 0 is the pathname, size_parm 0 to the fetch is the chunk number */
+static void
+BPath(register struct brequest *ab)
+{
+ register struct dcache *tdc = NULL;
+ struct vcache *tvc = NULL;
+ struct vnode *tvn = NULL;
#ifdef AFS_LINUX22_ENV
struct dentry *dp = NULL;
#endif
afs_int32 code;
AFS_STATCNT(BPath);
- if (code = afs_InitReq(&treq, ab->cred)) return;
+ if ((code = afs_InitReq(&treq, ab->cred)))
+ return;
AFS_GUNLOCK();
#ifdef AFS_LINUX22_ENV
- code = gop_lookupname((char *)ab->parm[0], AFS_UIOSYS, 1, (struct vnode **) 0, &dp);
+ code = gop_lookupname((char *)ab->ptr_parm[0], AFS_UIOSYS, 1, &dp);
if (dp)
- tvn = (struct vnode*)dp->d_inode;
+ tvn = (struct vnode *)dp->d_inode;
#else
- code = gop_lookupname((char *)ab->parm[0], AFS_UIOSYS, 1, (struct vnode **) 0, (struct vnode **)&tvn);
+ code = gop_lookupname((char *)ab->ptr_parm[0], AFS_UIOSYS, 1, &tvn);
#endif
AFS_GLOCK();
- osi_FreeLargeSpace((char *)ab->parm[0]); /* free path name buffer here */
- if (code) return;
+ osi_FreeLargeSpace((char *)ab->ptr_parm[0]); /* free path name buffer here */
+ if (code)
+ return;
/* now path may not have been in afs, so check that before calling our cache manager */
- if (!tvn || !IsAfsVnode((struct vnode *) tvn)) {
+ if (!tvn || !IsAfsVnode(tvn)) {
/* release it and give up */
if (tvn) {
-#ifdef AFS_DEC_ENV
- grele(tvn);
-#else
#ifdef AFS_LINUX22_ENV
dput(dp);
#else
- AFS_RELE((struct vnode *) tvn);
-#endif
+ AFS_RELE(tvn);
#endif
}
return;
}
-#ifdef AFS_DEC_ENV
- tvc = (struct vcache *) afs_gntovn(tvn);
-#else
- tvc = (struct vcache *) tvn;
-#endif
+ tvc = VTOAFS(tvn);
/* here we know its an afs vnode, so we can get the data for the chunk */
- tdc = afs_GetDCache(tvc, (afs_size_t) ab->parm[1], &treq, &offset, &len, 1);
+ tdc = afs_GetDCache(tvc, ab->size_parm[0], &treq, &offset, &len, 1);
if (tdc) {
afs_PutDCache(tdc);
}
-#ifdef AFS_DEC_ENV
- grele(tvn);
-#else
#ifdef AFS_LINUX22_ENV
dput(dp);
#else
- AFS_RELE((struct vnode *) tvn);
-#endif
+ AFS_RELE(tvn);
#endif
}
-/* parm 0 to the fetch is the chunk number; parm 1 is the dcache entry to wakeup,
- * parm 2 is true iff we should release the dcache entry here.
+/* size_parm 0 to the fetch is the chunk number,
+ * ptr_parm 0 is the dcache entry to wakeup,
+ * size_parm 1 is true iff we should release the dcache entry here.
*/
-void BPrefetch(ab)
- register struct brequest *ab; {
+static void
+BPrefetch(register struct brequest *ab)
+{
register struct dcache *tdc;
register struct vcache *tvc;
- afs_size_t offset, len;
+ afs_size_t offset, len, abyte, totallen = 0;
struct vrequest treq;
AFS_STATCNT(BPrefetch);
- if (len = afs_InitReq(&treq, ab->cred)) return;
- tvc = ab->vnode;
- tdc = afs_GetDCache(tvc, (afs_size_t)ab->parm[0], &treq, &offset, &len, 1);
- if (tdc) {
- afs_PutDCache(tdc);
- }
+ if ((len = afs_InitReq(&treq, ab->cred)))
+ return;
+ abyte = ab->size_parm[0];
+ tvc = ab->vc;
+ do {
+ tdc = afs_GetDCache(tvc, abyte, &treq, &offset, &len, 1);
+ if (tdc) {
+ afs_PutDCache(tdc);
+ }
+ abyte+=len;
+ totallen += len;
+ } while ((totallen < afs_preCache) && tdc && (len > 0));
/* now, dude may be waiting for us to clear DFFetchReq bit; do so. Can't
* use tdc from GetDCache since afs_GetDCache may fail, but someone may
* be waiting for our wakeup anyway.
*/
- tdc = (struct dcache *) (ab->parm[1]);
- tdc->flags &= ~DFFetchReq;
+ tdc = (struct dcache *)(ab->ptr_parm[0]);
+ ObtainSharedLock(&tdc->lock, 640);
+ if (tdc->mflags & DFFetchReq) {
+ UpgradeSToWLock(&tdc->lock, 641);
+ tdc->mflags &= ~DFFetchReq;
+ ReleaseWriteLock(&tdc->lock);
+ } else {
+ ReleaseSharedLock(&tdc->lock);
+ }
afs_osi_Wakeup(&tdc->validPos);
- if ((afs_size_t)ab->parm[2]) {
-#ifdef AFS_SUN5_ENVX
- mutex_enter(&tdc->lock);
- tdc->refCount--;
- mutex_exit(&tdc->lock);
-#else
+ if (ab->size_parm[1]) {
afs_PutDCache(tdc); /* put this one back, too */
-#endif
}
}
+#if defined(AFS_CACHE_BYPASS)
+#if 1 /* XXX Matt debugging */
+static
+#endif
+void
+BPrefetchNoCache(register struct brequest *ab)
+{
+ struct vrequest treq;
+ afs_size_t len;
+
+ if ((len = afs_InitReq(&treq, ab->cred)))
+ return;
-void BStore(ab)
- register struct brequest *ab; {
+#ifndef UKERNEL
+ /* OS-specific prefetch routine */
+ afs_PrefetchNoCache(ab->vc, ab->cred, (struct nocache_read_request *) ab->ptr_parm[0]);
+#else
+#warning Cache-bypass code path not implemented in UKERNEL
+#endif
+}
+#endif
+
+static void
+BStore(register struct brequest *ab)
+{
register struct vcache *tvc;
register afs_int32 code;
struct vrequest treq;
#endif
AFS_STATCNT(BStore);
- if (code = afs_InitReq(&treq, ab->cred)) return;
+ if ((code = afs_InitReq(&treq, ab->cred)))
+ return;
code = 0;
- tvc = ab->vnode;
+ tvc = ab->vc;
#if defined(AFS_SGI_ENV)
/*
* Since StoreOnLastReference can end up calling osi_SyncVM which
* operations, we hold the VOP_RWLOCK across this transaction as
* do the other callers of StoreOnLastReference
*/
- AFS_RWLOCK((vnode_t *)tvc, 1);
+ AFS_RWLOCK((vnode_t *) tvc, 1);
#endif
- ObtainWriteLock(&tvc->lock,209);
+ ObtainWriteLock(&tvc->lock, 209);
code = afs_StoreOnLastReference(tvc, &treq);
ReleaseWriteLock(&tvc->lock);
#if defined(AFS_SGI_ENV)
OSI_SET_CURRENT_CRED(tmpcred);
- AFS_RWUNLOCK((vnode_t *)tvc, 1);
+ AFS_RWUNLOCK((vnode_t *) tvc, 1);
#endif
/* now set final return code, and wakeup anyone waiting */
if ((ab->flags & BUVALID) == 0) {
- ab->code = afs_CheckCode(code, &treq, 43); /* set final code, since treq doesn't go across processes */
+ ab->code = afs_CheckCode(code, &treq, 43); /* set final code, since treq doesn't go across processes */
ab->flags |= BUVALID;
if (ab->flags & BUWAIT) {
ab->flags &= ~BUWAIT;
}
/* release a held request buffer */
-void afs_BRelease(ab)
- register struct brequest *ab; {
+void
+afs_BRelease(register struct brequest *ab)
+{
AFS_STATCNT(afs_BRelease);
- MObtainWriteLock(&afs_xbrs,294);
+ MObtainWriteLock(&afs_xbrs, 294);
if (--ab->refCount <= 0) {
ab->flags = 0;
}
- if (afs_brsWaiters) afs_osi_Wakeup(&afs_brsWaiters);
+ if (afs_brsWaiters)
+ afs_osi_Wakeup(&afs_brsWaiters);
MReleaseWriteLock(&afs_xbrs);
}
/* return true if bkg fetch daemons are all busy */
-int afs_BBusy() {
+int
+afs_BBusy(void)
+{
AFS_STATCNT(afs_BBusy);
- if (afs_brsDaemons > 0) return 0;
+ if (afs_brsDaemons > 0)
+ return 0;
return 1;
}
-struct brequest *afs_BQueue(aopcode, avc, dontwait, ause, acred, aparm0, aparm1, aparm2, aparm3)
- register short aopcode;
- afs_int32 ause, dontwait;
- register struct vcache *avc;
- struct AFS_UCRED *acred;
- /* On 64 bit platforms, "long" does the right thing. */
- afs_size_t aparm0, aparm1, aparm2, aparm3;
+struct brequest *
+afs_BQueue(register short aopcode, register struct vcache *avc,
+ afs_int32 dontwait, afs_int32 ause, struct AFS_UCRED *acred,
+ afs_size_t asparm0, afs_size_t asparm1, void *apparm0)
{
register int i;
register struct brequest *tb;
AFS_STATCNT(afs_BQueue);
- MObtainWriteLock(&afs_xbrs,296);
+ MObtainWriteLock(&afs_xbrs, 296);
while (1) {
tb = afs_brs;
- for(i=0;i<NBRS;i++,tb++) {
- if (tb->refCount == 0) break;
+ for (i = 0; i < NBRS; i++, tb++) {
+ if (tb->refCount == 0)
+ break;
}
if (i < NBRS) {
/* found a buffer */
tb->opcode = aopcode;
- tb->vnode = avc;
+ tb->vc = avc;
tb->cred = acred;
crhold(tb->cred);
if (avc) {
-#ifdef AFS_DEC_ENV
- avc->vrefCount++;
-#else
- VN_HOLD((struct vnode *)avc);
-#endif
+ VN_HOLD(AFSTOV(avc));
}
- tb->refCount = ause+1;
- tb->parm[0] = aparm0;
- tb->parm[1] = aparm1;
- tb->parm[2] = aparm2;
- tb->parm[3] = aparm3;
+ tb->refCount = ause + 1;
+ tb->size_parm[0] = asparm0;
+ tb->size_parm[1] = asparm1;
+ tb->ptr_parm[0] = apparm0;
tb->flags = 0;
tb->code = 0;
+ tb->ts = afs_brs_count++;
/* if daemons are waiting for work, wake them up */
if (afs_brsDaemons > 0) {
afs_osi_Wakeup(&afs_brsDaemons);
MReleaseWriteLock(&afs_xbrs);
return tb;
}
- if (dontwait) {
+ if (dontwait) {
MReleaseWriteLock(&afs_xbrs);
- return (struct brequest *)0;
+ return NULL;
}
/* no free buffers, sleep a while */
afs_brsWaiters++;
MReleaseWriteLock(&afs_xbrs);
afs_osi_Sleep(&afs_brsWaiters);
- MObtainWriteLock(&afs_xbrs,301);
+ MObtainWriteLock(&afs_xbrs, 301);
afs_brsWaiters--;
}
}
-#ifdef AFS_AIX32_ENV
#ifdef AFS_AIX41_ENV
/* AIX 4.1 has a much different sleep/wakeup mechanism available for use.
* The modifications here will work for either a UP or MP machine.
*/
-struct buf *afs_asyncbuf = (struct buf*)0;
-afs_int32 afs_asyncbuf_cv = EVENT_NULL;
+struct buf *afs_asyncbuf = (struct buf *)0;
+tid_t afs_asyncbuf_cv = EVENT_NULL;
afs_int32 afs_biodcnt = 0;
/* in implementing this, I assumed that all external linked lists were
* This function obtains, and returns, a pointer to a buffer for
* processing by a daemon. It sleeps until such a buffer is available.
* The source of buffers for it is the list afs_asyncbuf (see also
- * naix_vm_strategy). This function may be invoked concurrently by
+ * afs_gn_strategy). This function may be invoked concurrently by
* several processes, that is, several instances of the same daemon.
- * naix_vm_strategy, which adds buffers to the list, runs at interrupt
+ * afs_gn_strategy, which adds buffers to the list, runs at interrupt
* level, while get_bioreq runs at process level.
*
* Since AIX 4.1 can wake just one process at a time, the separate sleep
* process and interrupts.
*/
Simple_lock afs_asyncbuf_lock;
-/*static*/ struct buf *afs_get_bioreq()
+struct buf *
+afs_get_bioreq()
{
- struct buf *bp = (struct buf *) 0;
+ struct buf *bp = NULL;
struct buf *bestbp;
struct buf **bestlbpP, **lbpP;
- int bestage, stop;
- struct buf *t1P, *t2P; /* temp pointers for list manipulation */
+ long bestage, stop;
+ struct buf *t1P, *t2P; /* temp pointers for list manipulation */
int oldPriority;
afs_uint32 wait_ret;
struct afs_bioqueue *s;
/* ??? Does the forward pointer of the returned buffer need to be NULL?
- */
-
+ */
+
/* Disable interrupts from the strategy function, and save the
* prior priority level and lock access to the afs_asyncbuf.
*/
AFS_GUNLOCK();
- oldPriority = disable_lock(INTMAX, &afs_asyncbuf_lock) ;
+ oldPriority = disable_lock(INTMAX, &afs_asyncbuf_lock);
- while(1) {
+ while (1) {
if (afs_asyncbuf) {
/* look for oldest buffer */
bp = bestbp = afs_asyncbuf;
- bestage = (int) bestbp->av_back;
+ bestage = (long)bestbp->av_back;
bestlbpP = &afs_asyncbuf;
while (1) {
lbpP = &bp->av_forw;
bp = *lbpP;
- if (!bp) break;
- if ((int) bp->av_back - bestage < 0) {
+ if (!bp)
+ break;
+ if ((long)bp->av_back - bestage < 0) {
bestbp = bp;
bestlbpP = lbpP;
- bestage = (int) bp->av_back;
+ bestage = (long)bp->av_back;
}
}
bp = bestbp;
*bestlbpP = bp->av_forw;
break;
- }
- else {
+ } else {
/* If afs_asyncbuf is null, it is necessary to go to sleep.
* e_wakeup_one() ensures that only one thread wakes.
*/
/* The LOCK_HANDLER indicates to e_sleep_thread to only drop the
* lock on an MP machine.
*/
- interrupted = e_sleep_thread(&afs_asyncbuf_cv,
- &afs_asyncbuf_lock,
- LOCK_HANDLER|INTERRUPTIBLE);
- if (interrupted==THREAD_INTERRUPTED) {
+ interrupted =
+ e_sleep_thread(&afs_asyncbuf_cv, &afs_asyncbuf_lock,
+ LOCK_HANDLER | INTERRUPTIBLE);
+ if (interrupted == THREAD_INTERRUPTED) {
/* re-enable interrupts from strategy */
unlock_enable(oldPriority, &afs_asyncbuf_lock);
AFS_GLOCK();
- return(NULL);
+ return (NULL);
}
- } /* end of "else asyncbuf is empty" */
- } /* end of "inner loop" */
-
- /*assert (bp);*/
-
+ } /* end of "else asyncbuf is empty" */
+ } /* end of "inner loop" */
+
+ /*assert (bp); */
+
unlock_enable(oldPriority, &afs_asyncbuf_lock);
AFS_GLOCK();
* ??? what happens to the gnodes? They're not just cut loose,
* are they?
*/
- for(t1P=bp;;) {
- t2P = (struct buf *) t1P->b_work;
- t1P->b_vp = ((struct gnode *) t1P->b_vp)->gn_vnode;
- if (!t2P)
+ for (t1P = bp;;) {
+ t2P = (struct buf *)t1P->b_work;
+ t1P->b_vp = ((struct gnode *)t1P->b_vp)->gn_vnode;
+ if (!t2P)
break;
- t1P = (struct buf *) t2P->b_work;
- t2P->b_vp = ((struct gnode *) t2P->b_vp)->gn_vnode;
+ t1P = (struct buf *)t2P->b_work;
+ t2P->b_vp = ((struct gnode *)t2P->b_vp)->gn_vnode;
if (!t1P)
break;
}
* violation, rather than a request for I/O. The remainder
* of the outer loop handles the case where the B_PFPROT bit is clear.
*/
- if (bp->b_flags & B_PFPROT) {
+ if (bp->b_flags & B_PFPROT) {
return (bp);
}
return (bp);
-} /* end of function get_bioreq() */
+} /* end of function get_bioreq() */
/* afs_BioDaemon
* each making the appropriate syscall, which will cause this
* function to be invoked.
*/
-static int afs_initbiod = 0; /* this is self-initializing code */
+static int afs_initbiod = 0; /* this is self-initializing code */
int DOvmlock = 0;
-afs_BioDaemon (nbiods)
- afs_int32 nbiods;
+int
+afs_BioDaemon(afs_int32 nbiods)
{
afs_int32 code, s, pflg = 0;
label_t jmpbuf;
- struct buf *bp, *bp1, *tbp1, *tbp2; /* temp pointers only */
+ struct buf *bp, *bp1, *tbp1, *tbp2; /* temp pointers only */
caddr_t tmpaddr;
struct vnode *vp;
struct vcache *vcp;
/* pin lock, since we'll be using it in an interrupt. */
lock_alloc(&afs_asyncbuf_lock, LOCK_ALLOC_PIN, 2, 1);
simple_lock_init(&afs_asyncbuf_lock);
- pin (&afs_asyncbuf, sizeof(struct buf*));
- pin (&afs_asyncbuf_cv, sizeof(afs_int32));
+ pin(&afs_asyncbuf, sizeof(struct buf *));
+ pin(&afs_asyncbuf_cv, sizeof(afs_int32));
}
/* Ignore HUP signals... */
-#ifdef AFS_AIX41_ENV
{
- sigset_t sigbits, osigbits;
- /*
- * add SIGHUP to the set of already masked signals
- */
- SIGFILLSET(sigbits); /* allow all signals */
- SIGDELSET(sigbits, SIGHUP); /* except SIGHUP */
- limit_sigs(&sigbits, &osigbits); /* and already masked */
+ sigset_t sigbits, osigbits;
+ /*
+ * add SIGHUP to the set of already masked signals
+ */
+ SIGFILLSET(sigbits); /* allow all signals */
+ SIGDELSET(sigbits, SIGHUP); /* except SIGHUP */
+ limit_sigs(&sigbits, &osigbits); /* and already masked */
}
-#else
- SIGDELSET(u.u_procp->p_sig, SIGHUP);
- SIGADDSET(u.u_procp->p_sigignore, SIGHUP);
- SIGDELSET(u.u_procp->p_sigcatch, SIGHUP);
-#endif
/* Main body starts here -- this is an intentional infinite loop, and
* should NEVER exit
*
while (1) {
bp = afs_get_bioreq();
if (!bp)
- break; /* we were interrupted */
+ break; /* we were interrupted */
if (code = setjmpx(&jmpbuf)) {
/* This should not have happend, maybe a lack of resources */
AFS_GUNLOCK();
s = disable_lock(INTMAX, &afs_asyncbuf_lock);
- for (bp1 = bp; bp ; bp = bp1) {
+ for (bp1 = bp; bp; bp = bp1) {
if (bp1)
- bp1 = (struct buf *) bp1->b_work;
+ bp1 = (struct buf *)bp1->b_work;
bp->b_actf = 0;
bp->b_error = code;
bp->b_flags |= B_ERROR;
AFS_GLOCK();
continue;
}
- vcp = (struct vcache *)bp->b_vp;
+ vcp = VTOAFS(bp->b_vp);
if (bp->b_flags & B_PFSTORE) { /* XXXX */
- ObtainWriteLock(&vcp->lock,404);
+ ObtainWriteLock(&vcp->lock, 404);
if (vcp->v.v_gnode->gn_mwrcnt) {
-#ifdef AFS_64BIT_CLIENT
- if (vcp->m.Length <
- (afs_offs_t)dbtob(bp->b_blkno) + bp->b_bcount)
- vcp->m.Length =
- (afs_offs_t)dbtob(bp->b_blkno) + bp->b_bcount;
-#else /* AFS_64BIT_CLIENT */
- if (vcp->m.Length < bp->b_bcount + (u_int)dbtob(bp->b_blkno))
- vcp->m.Length = bp->b_bcount + (u_int)dbtob(bp->b_blkno);
-#endif /* AFS_64BIT_CLIENT */
+ afs_offs_t newlength =
+ (afs_offs_t) dbtob(bp->b_blkno) + bp->b_bcount;
+ if (vcp->f.m.Length < newlength) {
+ afs_Trace4(afs_iclSetp, CM_TRACE_SETLENGTH,
+ ICL_TYPE_STRING, __FILE__, ICL_TYPE_LONG,
+ __LINE__, ICL_TYPE_OFFSET,
+ ICL_HANDLE_OFFSET(vcp->f.m.Length),
+ ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(newlength));
+ vcp->f.m.Length = newlength;
+ }
}
ReleaseWriteLock(&vcp->lock);
}
/* If the buffer represents a protection violation, rather than
* an actual request for I/O, no special action need be taken.
*/
- if ( bp->b_flags & B_PFPROT ) {
- iodone (bp); /* Notify all users of the buffer that we're done */
+ if (bp->b_flags & B_PFPROT) {
+ iodone(bp); /* Notify all users of the buffer that we're done */
clrjmpx(&jmpbuf);
continue;
- }
-if (DOvmlock)
- ObtainWriteLock(&vcp->pvmlock,211);
- /*
- * First map its data area to a region in the current address space
- * by calling vm_att with the subspace identifier, and a pointer to
- * the data area. vm_att returns a new data area pointer, but we
- * also want to hang onto the old one.
- */
- tmpaddr = bp->b_baddr;
- bp->b_baddr = vm_att (bp->b_xmemd.subspace_id, tmpaddr);
- tmperr = afs_ustrategy(bp); /* temp variable saves offset calculation */
- if (tmperr) { /* in non-error case */
- bp->b_flags |= B_ERROR; /* should other flags remain set ??? */
- bp->b_error = tmperr;
- }
-
- /* Unmap the buffer's data area by calling vm_det. Reset data area
- * to the value that we saved above.
- */
- vm_det(bp->b_un.b_addr);
- bp->b_baddr = tmpaddr;
-
- /*
- * buffer may be linked with other buffers via the b_work field.
- * See also naix_vm_strategy. For each buffer in the chain (including
- * bp) notify all users of the buffer that the daemon is finished
- * using it by calling iodone.
- * assumes iodone can modify the b_work field.
- */
- for(tbp1=bp;;) {
- tbp2 = (struct buf *) tbp1->b_work;
- iodone(tbp1);
- if (!tbp2)
- break;
-
- tbp1 = (struct buf *) tbp2->b_work;
- iodone(tbp2);
- if (!tbp1)
- break;
- }
-if (DOvmlock)
- ReleaseWriteLock(&vcp->pvmlock); /* Unlock the vnode. */
- clrjmpx(&jmpbuf);
- } /* infinite loop (unless we're interrupted) */
-} /* end of afs_BioDaemon() */
-
-#else /* AFS_AIX41_ENV */
-
-
-#define squeue afs_q
-struct afs_bioqueue {
- struct squeue lruq;
- int sleeper;
- int cnt;
-};
-struct afs_bioqueue afs_bioqueue;
-struct buf *afs_busyq = NULL;
-struct buf *afs_asyncbuf;
-afs_int32 afs_biodcnt = 0;
-
-/* in implementing this, I assumed that all external linked lists were
- * null-terminated.
- *
- * Several places in this code traverse a linked list. The algorithm
- * used here is probably unfamiliar to most people. Careful examination
- * will show that it eliminates an assignment inside the loop, as compared
- * to the standard algorithm, at the cost of occasionally using an extra
- * variable.
- */
-
-/* get_bioreq()
- *
- * This function obtains, and returns, a pointer to a buffer for
- * processing by a daemon. It sleeps until such a buffer is available.
- * The source of buffers for it is the list afs_asyncbuf (see also
- * naix_vm_strategy). This function may be invoked concurrently by
- * several processes, that is, several instances of the same daemon.
- * naix_vm_strategy, which adds buffers to the list, runs at interrupt
- * level, while get_bioreq runs at process level.
- *
- * The common kernel paradigm of sleeping and waking up, in which all the
- * competing processes sleep waiting for wakeups on one address, is not
- * followed here. Instead, the following paradigm is used: when a daemon
- * goes to sleep, it checks for other sleeping daemons. If there aren't any,
- * it sleeps on the address of variable afs_asyncbuf. But if there is
- * already a daemon sleeping on that address, it threads its own unique
- * address onto a list, and sleeps on that address. This way, every
- * sleeper is sleeping on a different address, and every wakeup wakes up
- * exactly one daemon. This prevents a whole bunch of daemons from waking
- * up and then immediately having to go back to sleep. This provides a
- * performance gain and makes the I/O scheduling a bit more deterministic.
- * The list of sleepers is variable afs_bioqueue. The unique address
- * on which to sleep is passed to get_bioreq as its parameter.
- */
-/*static*/ struct buf *afs_get_bioreq(self)
- struct afs_bioqueue *self; /* address on which to sleep */
-
-{
- struct buf *bp = (struct buf *) 0;
- struct buf *bestbp;
- struct buf **bestlbpP, **lbpP;
- int bestage, stop;
- struct buf *t1P, *t2P; /* temp pointers for list manipulation */
- int oldPriority;
- afs_uint32 wait_ret;
-struct afs_bioqueue *s;
-
- /* ??? Does the forward pointer of the returned buffer need to be NULL?
- */
-
- /* Disable interrupts from the strategy function, and save the
- * prior priority level
- */
- oldPriority = i_disable ( INTMAX ) ;
-
- /* Each iteration of following loop either pulls
- * a buffer off afs_asyncbuf, or sleeps.
- */
- while (1) { /* inner loop */
- if (afs_asyncbuf) {
- /* look for oldest buffer */
- bp = bestbp = afs_asyncbuf;
- bestage = (int) bestbp->av_back;
- bestlbpP = &afs_asyncbuf;
- while (1) {
- lbpP = &bp->av_forw;
- bp = *lbpP;
- if (!bp) break;
- if ((int) bp->av_back - bestage < 0) {
- bestbp = bp;
- bestlbpP = lbpP;
- bestage = (int) bp->av_back;
- }
- }
- bp = bestbp;
- *bestlbpP = bp->av_forw;
- break;
- }
- else {
- int interrupted;
-
- /* If afs_asyncbuf is null, it is necessary to go to sleep.
- * There are two possibilities: either there is already a
- * daemon that is sleeping on the address of afs_asyncbuf,
- * or there isn't.
- */
- if (afs_bioqueue.sleeper) {
- /* enqueue */
- QAdd (&(afs_bioqueue.lruq), &(self->lruq));
- interrupted = sleep ((caddr_t) self, PCATCH|(PZERO + 1));
- if (self->lruq.next != &self->lruq) { /* XXX ##3 XXX */
- QRemove (&(self->lruq)); /* dequeue */
- }
-self->cnt++;
- afs_bioqueue.sleeper = FALSE;
- if (interrupted) {
- /* re-enable interrupts from strategy */
- i_enable (oldPriority);
- return(NULL);
- }
- continue;
- } else {
- afs_bioqueue.sleeper = TRUE;
- interrupted = sleep ((caddr_t) &afs_asyncbuf, PCATCH|(PZERO + 1));
- afs_bioqueue.sleeper = FALSE;
- if (interrupted)
- {
- /*
- * We need to wakeup another daemon if present
- * since we were waiting on afs_asyncbuf.
- */
-#ifdef notdef /* The following doesn't work as advertised */
- if (afs_bioqueue.lruq.next != &afs_bioqueue.lruq)
- {
- struct squeue *bq = afs_bioqueue.lruq.next;
- QRemove (bq);
- wakeup (bq);
- }
-#endif
- /* re-enable interrupts from strategy */
- i_enable (oldPriority);
- return(NULL);
- }
- continue;
- }
-
- } /* end of "else asyncbuf is empty" */
- } /* end of "inner loop" */
-
- /*assert (bp);*/
-
- i_enable (oldPriority); /* re-enable interrupts from strategy */
-
- /* For the convenience of other code, replace the gnodes in
- * the b_vp field of bp and the other buffers on the b_work
- * chain with the corresponding vnodes.
- *
- * ??? what happens to the gnodes? They're not just cut loose,
- * are they?
- */
- for(t1P=bp;;) {
- t2P = (struct buf *) t1P->b_work;
- t1P->b_vp = ((struct gnode *) t1P->b_vp)->gn_vnode;
- if (!t2P)
- break;
-
- t1P = (struct buf *) t2P->b_work;
- t2P->b_vp = ((struct gnode *) t2P->b_vp)->gn_vnode;
- if (!t1P)
- break;
- }
-
- /* If the buffer does not specify I/O, it may immediately
- * be returned to the caller. This condition is detected
- * by examining the buffer's flags (the b_flags field). If
- * the B_PFPROT bit is set, the buffer represents a protection
- * violation, rather than a request for I/O. The remainder
- * of the outer loop handles the case where the B_PFPROT bit is clear.
- */
- if (bp->b_flags & B_PFPROT) {
- return (bp);
- }
-
- /* wake up another process to handle the next buffer, and return
- * bp to the caller.
- */
- oldPriority = i_disable ( INTMAX ) ;
-
- /* determine where to find the sleeping process.
- * There are two cases: either it is sleeping on
- * afs_asyncbuf, or it is sleeping on its own unique
- * address. These cases are distinguished by examining
- * the sleeper field of afs_bioqueue.
- */
- if (afs_bioqueue.sleeper) {
- wakeup (&afs_asyncbuf);
- }
- else {
- if (afs_bioqueue.lruq.next == &afs_bioqueue.lruq) {
- /* queue is empty, what now? ???*/
- /* Should this be impossible, or does */
- /* it just mean that nobody is sleeping? */;
- }
- else {
- struct squeue *bq = afs_bioqueue.lruq.next;
- QRemove (bq);
- QInit (bq);
- wakeup (bq);
- afs_bioqueue.sleeper = TRUE;
- }
- }
- i_enable (oldPriority); /* re-enable interrupts from strategy */
- return (bp);
-
-} /* end of function get_bioreq() */
-
-
-/* afs_BioDaemon
- *
- * This function is the daemon. It is called from the syscall
- * interface. Ordinarily, a script or an administrator will run a
- * daemon startup utility, specifying the number of I/O daemons to
- * run. The utility will fork off that number of processes,
- * each making the appropriate syscall, which will cause this
- * function to be invoked.
- */
-static int afs_initbiod = 0; /* this is self-initializing code */
-int DOvmlock = 0;
-afs_BioDaemon (nbiods)
- afs_int32 nbiods;
-{
- struct afs_bioqueue *self;
- afs_int32 code, s, pflg = 0;
- label_t jmpbuf;
- struct buf *bp, *bp1, *tbp1, *tbp2; /* temp pointers only */
- caddr_t tmpaddr;
- struct vnode *vp;
- struct vcache *vcp;
- char tmperr;
- if (!afs_initbiod) {
- /* XXX ###1 XXX */
- afs_initbiod = 1;
- /* Initialize the queue of waiting processes, afs_bioqueue. */
- QInit (&(afs_bioqueue.lruq));
- }
-
- /* establish ourself as a kernel process so shutdown won't kill us */
-/* u.u_procp->p_flag |= SKPROC;*/
-
- /* Initialize a token (self) to use in the queue of sleeping processes. */
- self = (struct afs_bioqueue *) afs_osi_Alloc (sizeof (struct afs_bioqueue));
- pin (self, sizeof (struct afs_bioqueue)); /* fix in memory */
- memset(self, 0, sizeof(*self));
- QInit (&(self->lruq)); /* initialize queue entry pointers */
-
-
- /* Ignore HUP signals... */
-#ifdef AFS_AIX41_ENV
- {
- sigset_t sigbits, osigbits;
- /*
- * add SIGHUP to the set of already masked signals
- */
- SIGFILLSET(sigbits); /* allow all signals */
- SIGDELSET(sigbits, SIGHUP); /* except SIGHUP */
- limit_sigs(&sigbits, &osigbits); /* and already masked */
- }
-#else
- SIGDELSET(u.u_procp->p_sig, SIGHUP);
- SIGADDSET(u.u_procp->p_sigignore, SIGHUP);
- SIGDELSET(u.u_procp->p_sigcatch, SIGHUP);
-#endif
- /* Main body starts here -- this is an intentional infinite loop, and
- * should NEVER exit
- *
- * Now, the loop will exit if get_bioreq() returns NULL, indicating
- * that we've been interrupted.
- */
- while (1) {
- bp = afs_get_bioreq(self);
- if (!bp)
- break; /* we were interrupted */
- if (code = setjmpx(&jmpbuf)) {
- /* This should not have happend, maybe a lack of resources */
- s = splimp();
- for (bp1 = bp; bp ; bp = bp1) {
- if (bp1)
- bp1 = bp1->b_work;
- bp->b_actf = 0;
- bp->b_error = code;
- bp->b_flags |= B_ERROR;
- iodone(bp);
- }
- splx(s);
- continue;
}
- vcp = (struct vcache *)bp->b_vp;
- if (bp->b_flags & B_PFSTORE) {
- ObtainWriteLock(&vcp->lock,210);
- if (vcp->v.v_gnode->gn_mwrcnt) {
- if (vcp->m.Length < bp->b_bcount + (u_int)dbtob(bp->b_blkno))
- vcp->m.Length = bp->b_bcount + (u_int)dbtob(bp->b_blkno);
- }
- ReleaseWriteLock(&vcp->lock);
- }
- /* If the buffer represents a protection violation, rather than
- * an actual request for I/O, no special action need be taken.
- */
- if ( bp->b_flags & B_PFPROT ) {
- iodone (bp); /* Notify all users of the buffer that we're done */
- continue;
- }
-if (DOvmlock)
- ObtainWriteLock(&vcp->pvmlock,558);
+ if (DOvmlock)
+ ObtainWriteLock(&vcp->pvmlock, 211);
/*
* First map its data area to a region in the current address space
* by calling vm_att with the subspace identifier, and a pointer to
* also want to hang onto the old one.
*/
tmpaddr = bp->b_baddr;
- bp->b_baddr = vm_att (bp->b_xmemd.subspace_id, tmpaddr);
+ bp->b_baddr = (caddr_t) vm_att(bp->b_xmemd.subspace_id, tmpaddr);
tmperr = afs_ustrategy(bp); /* temp variable saves offset calculation */
- if (tmperr) { /* in non-error case */
- bp->b_flags |= B_ERROR; /* should other flags remain set ??? */
+ if (tmperr) { /* in non-error case */
+ bp->b_flags |= B_ERROR; /* should other flags remain set ??? */
bp->b_error = tmperr;
}
/* Unmap the buffer's data area by calling vm_det. Reset data area
* to the value that we saved above.
*/
- vm_det(bp->b_un.b_addr);
+ vm_det(bp->b_baddr);
bp->b_baddr = tmpaddr;
/*
* buffer may be linked with other buffers via the b_work field.
- * See also naix_vm_strategy. For each buffer in the chain (including
+ * See also afs_gn_strategy. For each buffer in the chain (including
* bp) notify all users of the buffer that the daemon is finished
* using it by calling iodone.
* assumes iodone can modify the b_work field.
*/
- for(tbp1=bp;;) {
- tbp2 = (struct buf *) tbp1->b_work;
+ for (tbp1 = bp;;) {
+ tbp2 = (struct buf *)tbp1->b_work;
iodone(tbp1);
- if (!tbp2)
+ if (!tbp2)
break;
- tbp1 = (struct buf *) tbp2->b_work;
+ tbp1 = (struct buf *)tbp2->b_work;
iodone(tbp2);
if (!tbp1)
break;
}
-if (DOvmlock)
- ReleaseWriteLock(&vcp->pvmlock); /* Unlock the vnode. */
+ if (DOvmlock)
+ ReleaseWriteLock(&vcp->pvmlock); /* Unlock the vnode. */
clrjmpx(&jmpbuf);
- } /* infinite loop (unless we're interrupted) */
- unpin (self, sizeof (struct afs_bioqueue));
- afs_osi_Free (self, sizeof (struct afs_bioqueue));
-} /* end of afs_BioDaemon() */
-#endif /* AFS_AIX41_ENV */
-#endif /* AFS_AIX32_ENV */
+ } /* infinite loop (unless we're interrupted) */
+} /* end of afs_BioDaemon() */
+
+#endif /* AFS_AIX41_ENV */
int afs_nbrs = 0;
-void afs_BackgroundDaemon() {
+void
+afs_BackgroundDaemon(void)
+{
struct brequest *tb;
int i, foundAny;
- afs_int32 pid;
AFS_STATCNT(afs_BackgroundDaemon);
/* initialize subsystem */
memset((char *)afs_brs, 0, sizeof(afs_brs));
brsInit = 1;
#if defined (AFS_SGI_ENV) && defined(AFS_SGI_SHORTSTACK)
- /*
- * steal the first daemon for doing delayed DSlot flushing
- * (see afs_GetDownDSlot)
- */
+ /*
+ * steal the first daemon for doing delayed DSlot flushing
+ * (see afs_GetDownDSlot)
+ */
AFS_GUNLOCK();
- afs_sgidaemon();
- return;
+ afs_sgidaemon();
+ return;
#endif
}
afs_nbrs++;
- MObtainWriteLock(&afs_xbrs,302);
+ MObtainWriteLock(&afs_xbrs, 302);
while (1) {
+ int min_ts = 0;
+ struct brequest *min_tb = NULL;
+
if (afs_termState == AFSOP_STOP_BKG) {
if (--afs_nbrs <= 0)
afs_termState = AFSOP_STOP_TRUNCDAEMON;
afs_osi_Wakeup(&afs_termState);
return;
}
-
+
/* find a request */
tb = afs_brs;
foundAny = 0;
- for(i=0;i<NBRS;i++,tb++) {
- /* look for request */
+ for (i = 0; i < NBRS; i++, tb++) {
+ /* look for request with smallest ts */
if ((tb->refCount > 0) && !(tb->flags & BSTARTED)) {
/* new request, not yet picked up */
- tb->flags |= BSTARTED;
- MReleaseWriteLock(&afs_xbrs);
- foundAny = 1;
- afs_Trace1(afs_iclSetp, CM_TRACE_BKG1,
- ICL_TYPE_INT32, tb->opcode);
- if (tb->opcode == BOP_FETCH)
- BPrefetch(tb);
- else if (tb->opcode == BOP_STORE)
- BStore(tb);
- else if (tb->opcode == BOP_PATH)
- BPath(tb);
- else panic("background bop");
- if (tb->vnode) {
-#ifdef AFS_DEC_ENV
- tb->vnode->vrefCount--; /* fix up reference count */
-#else
- AFS_RELE((struct vnode *)(tb->vnode)); /* MUST call vnode layer or could lose vnodes */
-#endif
- tb->vnode = (struct vcache *) 0;
- }
- if (tb->cred) {
- crfree(tb->cred);
- tb->cred = (struct AFS_UCRED *) 0;
+ if ((min_tb && (min_ts - tb->ts > 0)) || !min_tb) {
+ min_tb = tb;
+ min_ts = tb->ts;
}
- afs_BRelease(tb); /* this grabs and releases afs_xbrs lock */
- MObtainWriteLock(&afs_xbrs,305);
}
}
+ if ((tb = min_tb)) {
+ /* claim and process this request */
+ tb->flags |= BSTARTED;
+ MReleaseWriteLock(&afs_xbrs);
+ foundAny = 1;
+ afs_Trace1(afs_iclSetp, CM_TRACE_BKG1, ICL_TYPE_INT32,
+ tb->opcode);
+ if (tb->opcode == BOP_FETCH)
+ BPrefetch(tb);
+#if defined(AFS_CACHE_BYPASS)
+ else if (tb->opcode == BOP_FETCH_NOCACHE)
+ BPrefetchNoCache(tb);
+#endif
+ else if (tb->opcode == BOP_STORE)
+ BStore(tb);
+ else if (tb->opcode == BOP_PATH)
+ BPath(tb);
+ else
+ panic("background bop");
+ if (tb->vc) {
+ AFS_RELE(AFSTOV(tb->vc)); /* MUST call vnode layer or could lose vnodes */
+ tb->vc = NULL;
+ }
+ if (tb->cred) {
+ crfree(tb->cred);
+ tb->cred = (struct AFS_UCRED *)0;
+ }
+ afs_BRelease(tb); /* this grabs and releases afs_xbrs lock */
+ MObtainWriteLock(&afs_xbrs, 305);
+ }
if (!foundAny) {
/* wait for new request */
afs_brsDaemons++;
MReleaseWriteLock(&afs_xbrs);
afs_osi_Sleep(&afs_brsDaemons);
- MObtainWriteLock(&afs_xbrs,307);
+ MObtainWriteLock(&afs_xbrs, 307);
afs_brsDaemons--;
}
}
}
-void shutdown_daemons()
+void
+shutdown_daemons(void)
{
- extern int afs_cold_shutdown;
- register int i;
- register struct brequest *tb;
-
- AFS_STATCNT(shutdown_daemons);
- if (afs_cold_shutdown) {
- afs_brsDaemons = brsInit = 0;
- rxepoch_checked = afs_nbrs = 0;
- memset((char *)afs_brs, 0, sizeof(afs_brs));
- memset((char *)&afs_xbrs, 0, sizeof(afs_lock_t));
- afs_brsWaiters = 0;
-#ifdef AFS_AIX32_ENV
+ AFS_STATCNT(shutdown_daemons);
+ if (afs_cold_shutdown) {
+ afs_brsDaemons = brsInit = 0;
+ rxepoch_checked = afs_nbrs = 0;
+ memset((char *)afs_brs, 0, sizeof(afs_brs));
+ memset((char *)&afs_xbrs, 0, sizeof(afs_lock_t));
+ afs_brsWaiters = 0;
#ifdef AFS_AIX41_ENV
- lock_free(&afs_asyncbuf_lock);
- unpin(&afs_asyncbuf, sizeof(struct buf*));
- pin (&afs_asyncbuf_cv, sizeof(afs_int32));
-#else /* AFS_AIX41_ENV */
- afs_busyq = NULL;
- afs_biodcnt = 0;
- memset((char *)&afs_bioqueue, 0, sizeof(struct afs_bioqueue));
-#endif
- afs_initbiod = 0;
+ lock_free(&afs_asyncbuf_lock);
+ unpin(&afs_asyncbuf, sizeof(struct buf *));
+ unpin(&afs_asyncbuf_cv, sizeof(afs_int32));
+ afs_initbiod = 0;
#endif
- }
+ }
}
#if defined(AFS_SGI_ENV) && defined(AFS_SGI_SHORTSTACK)
int
afs_sgidaemon(void)
{
- int s;
- struct dcache *tdc;
+ int s;
+ struct dcache *tdc;
- if (afs_sgibklock == NULL) {
- SV_INIT(&afs_sgibksync, "bksync", 0, 0);
- SV_INIT(&afs_sgibkwait, "bkwait", 0, 0);
- SPINLOCK_INIT(&afs_sgibklock, "bklock");
- }
- s = SPLOCK(afs_sgibklock);
- for (;;) {
- /* wait for something to do */
- SP_WAIT(afs_sgibklock, s, &afs_sgibksync, PINOD);
- osi_Assert(afs_sgibklist);
-
- /* XX will probably need to generalize to real list someday */
- s = SPLOCK(afs_sgibklock);
- while (afs_sgibklist) {
- tdc = afs_sgibklist;
- afs_sgibklist = NULL;
- SPUNLOCK(afs_sgibklock, s);
- AFS_GLOCK();
- tdc->flags &= ~DFEntryMod;
- afs_WriteDCache(tdc, 1);
- AFS_GUNLOCK();
- s = SPLOCK(afs_sgibklock);
- }
+ if (afs_sgibklock == NULL) {
+ SV_INIT(&afs_sgibksync, "bksync", 0, 0);
+ SV_INIT(&afs_sgibkwait, "bkwait", 0, 0);
+ SPINLOCK_INIT(&afs_sgibklock, "bklock");
+ }
+ s = SPLOCK(afs_sgibklock);
+ for (;;) {
+ /* wait for something to do */
+ SP_WAIT(afs_sgibklock, s, &afs_sgibksync, PINOD);
+ osi_Assert(afs_sgibklist);
- /* done all the work - wake everyone up */
- while (SV_SIGNAL(&afs_sgibkwait))
- ;
+ /* XX will probably need to generalize to real list someday */
+ s = SPLOCK(afs_sgibklock);
+ while (afs_sgibklist) {
+ tdc = afs_sgibklist;
+ afs_sgibklist = NULL;
+ SPUNLOCK(afs_sgibklock, s);
+ AFS_GLOCK();
+ tdc->dflags &= ~DFEntryMod;
+ afs_WriteDCache(tdc, 1);
+ AFS_GUNLOCK();
+ s = SPLOCK(afs_sgibklock);
}
+
+ /* done all the work - wake everyone up */
+ while (SV_SIGNAL(&afs_sgibkwait));
+ }
}
#endif
git://git.openafs.org / openafs.git / blobdiff