#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;
afs_int32 afs_gcpags_procsize = 0;
afs_int32 afs_CheckServerDaemonStarted = 0;
-#ifdef DEFAULT_PROBE_INTERVAL
-afs_int32 PROBE_INTERVAL = DEFAULT_PROBE_INTERVAL; /* overridding during compile */
-#else
-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;
+}
void
afs_CheckServerDaemon(void)
}
now = osi_Time();
- if (PROBE_INTERVAL + lastCheck <= now) {
+ 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);
+ 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();
}
}
/* 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_CheckServerDaemonStarted = 0;
}
+extern int vfs_context_ref;
+
void
afs_Daemon(void)
{
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;
/* things to do every minute */
DFlush(); /* write out dir buffers */
afs_WriteThroughDSlots(); /* write through cacheinfo entries */
+ 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;
}
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, NULL);
lastNMinCheck = now;
* directory is /afs.
*/
#ifdef AFS_LINUX20_ENV
- printk("afs_CheckVolume(): afs_root changed.\n");
+ {
+ 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
}
{
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;
+ abyte = ab->size_parm[0];
tvc = ab->vc;
- tdc = afs_GetDCache(tvc, ab->size_parm[0], &treq, &offset, &len, 1);
- if (tdc) {
- afs_PutDCache(tdc);
- }
+ 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.
}
}
+#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;
+
+#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)
}
}
-#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.
* 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 *
+struct buf *
afs_get_bioreq()
{
struct buf *bp = NULL;
if (vcp->v.v_gnode->gn_mwrcnt) {
afs_offs_t newlength =
(afs_offs_t) dbtob(bp->b_blkno) + bp->b_bcount;
- if (vcp->m.Length < newlength) {
+ 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->m.Length),
+ ICL_HANDLE_OFFSET(vcp->f.m.Length),
ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(newlength));
- vcp->m.Length = newlength;
+ vcp->f.m.Length = newlength;
}
}
ReleaseWriteLock(&vcp->lock);
/*
* 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.
} /* 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 = NULL;
- 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... */
- SIGDELSET(u.u_procp->p_sig, SIGHUP);
- SIGADDSET(u.u_procp->p_sigignore, SIGHUP);
- SIGDELSET(u.u_procp->p_sigcatch, SIGHUP);
- /* 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 = VTOAFS(bp->b_vp);
- if (bp->b_flags & B_PFSTORE) {
- ObtainWriteLock(&vcp->lock, 210);
- if (vcp->v.v_gnode->gn_mwrcnt) {
- afs_offs_t newlength =
- (afs_offs_t) dbtob(bp->b_blkno) + bp->b_bcount;
- if (vcp->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->m.Length),
- ICL_TYPE_OFFSET, ICL_HANDLE_OFFSET(newlength));
- vcp->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 */
- continue;
- }
- if (DOvmlock)
- ObtainWriteLock(&vcp->pvmlock, 558);
- /*
- * 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) */
- 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 */
int afs_nbrs = 0;
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)
memset((char *)afs_brs, 0, sizeof(afs_brs));
memset((char *)&afs_xbrs, 0, sizeof(afs_lock_t));
afs_brsWaiters = 0;
-#ifdef AFS_AIX32_ENV
#ifdef AFS_AIX41_ENV
lock_free(&afs_asyncbuf_lock);
unpin(&afs_asyncbuf, sizeof(struct buf *));
unpin(&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;
#endif
}
git://git.openafs.org / openafs.git / blobdiff