/*
* Copyright 2000, International Business Machines Corporation and others.
* 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
* directory or online at http://www.openafs.org/dl/license10.html
#include <afsconfig.h>
#include "afs/param.h"
-RCSID("$Header$");
-
#include "afs/sysincludes.h" /* Standard vendor system headers */
-#include "afsincludes.h" /* Afs-based standard headers */
-#include "afs/afs_stats.h" /* statistics */
-/* #include <vm/vm_ubc.h> */
-#include <limits.h>
-#include <float.h>
+#include "afs/afsincludes.h" /* Afs-based standard headers */
+#include "afs/afs_stats.h" /* statistics */
/* Try to discard pages, in order to recycle a vcache entry.
*
*
* OSF/1 Locking: VN_LOCK has been called.
*/
-int osi_VM_FlushVCache(struct vcache *avc, int *slept)
+int
+osi_VM_FlushVCache(struct vcache *avc, int *slept)
{
-#ifdef SECRETLY_OSF1
- if (avc->vrefCount > 1)
- return EBUSY;
+ struct vnode *vp = AFSTOV(avc);
- if (avc->opens)
- return EBUSY;
+ if ((afs_debug & AFSDEB_VNLAYER) != 0) {
+ printf("%s enter\n", __func__);
+ }
- /* if a lock is held, give up */
- if (CheckLock(&avc->lock) || afs_CheckBozonLock(&avc->pvnLock))
- return EBUSY;
+ if (vp == NULL) {
+ printf("%s NULL vp\n", __func__);
+ return 0;
+ }
AFS_GUNLOCK();
- ubc_invalidate(((struct vnode *)avc)->v_object, 0, 0, B_INVAL);
+ cache_purge(vp);
+ vflushbuf(vp, 1);
AFS_GLOCK();
-#endif /* SECRETLY_OSF1 */
- return 0;
-}
+ if ((afs_debug & AFSDEB_VNLAYER) != 0) {
+ printf("%s exit\n", __func__);
+ }
-/*
- * osi_ubc_flush_dirty_and_wait -- ensure all dirty pages cleaned
- *
- * Alpha OSF/1 doesn't make it easy to wait for all dirty pages to be cleaned.
- * NFS tries to do this by calling waitforio(), which waits for v_numoutput
- * to go to zero. But that isn't good enough, because afs_putpage() doesn't
- * increment v_numoutput until it has obtained the vcache entry lock. Suppose
- * that Process A, trying to flush a page, is waiting for that lock, and
- * Process B tries to close the file. Process B calls waitforio() which thinks
- * that everything is cool because v_numoutput is still zero. Process B then
- * proceeds to call afs_StoreAllSegments(). Finally when B is finished, A gets
- * to proceed and flush its page. But then it's too late because the file is
- * already closed.
- *
- * (I suspect that waitforio() is not adequate for NFS, just as it isn't
- * adequate for us. But that's not my problem.)
- *
- * The only way we can be sure that there are no more dirty pages is if there
- * are no more pages with pg_busy set. We look for them on the cleanpl.
- *
- * For some reason, ubc_flush_dirty() only looks at the dirtypl, not the
- * dirtywpl. I don't know why this is good enough, but I assume it is. By
- * the same token, I only look for busy pages on the cleanpl, not the cleanwpl.
- *
- * Called with the global lock NOT held.
- */
-static void osi_ubc_flush_dirty_and_wait(struct vnode *vp, int flags)
-{
- int retry;
- vm_page_t pp;
- int first;
-
-#ifdef SECRETLY_OSF1
- do {
- struct vm_ubc_object* vop;
- vop = (struct vm_ubc_object*)(vp->v_object);
- ubc_flush_dirty(vop, flags);
-
- vm_object_lock(vop);
- if (vop->vu_dirtypl)
- /* shouldn't happen, but who knows */
- retry = 1;
- else {
- retry = 0;
- if (vop->vu_cleanpl) {
- for (first = 1, pp = vop->vu_cleanpl;
- first || pp != vop->vu_cleanpl;
- first = 0, pp = pp->pg_onext) {
- if (pp->pg_busy) {
- retry = 1;
- pp->pg_wait = 1;
- assert_wait_mesg((vm_offset_t)pp, FALSE, "pg_wait");
- vm_object_unlock(vop);
- thread_block();
- break;
- }
- }
- }
- if (retry) continue;
- }
- vm_object_unlock(vop);
- } while (retry);
-#endif /* SECRETLY_OSF1 */
+ return 0;
}
/* Try to store pages to cache, in order to store a file back to the server.
* Locking: the vcache entry's lock is held. It will usually be dropped and
* re-obtained.
*/
-void osi_VM_StoreAllSegments(struct vcache *avc)
+void
+osi_VM_StoreAllSegments(struct vcache *avc)
{
-#ifdef SECRETLY_OSF1
+ struct vnode *vp;
+
+ if ((afs_debug & AFSDEB_VNLAYER) != 0) {
+ printf("%s enter\n", __func__);
+ }
+
ReleaseWriteLock(&avc->lock);
AFS_GUNLOCK();
- osi_ubc_flush_dirty_and_wait((struct vnode *)avc, 0);
+ vp = AFSTOV(avc);
+ mutex_enter(&vp->v_interlock);
+ VOP_PUTPAGES(vp, 0, 0, PGO_ALLPAGES|PGO_CLEANIT|PGO_SYNCIO);
AFS_GLOCK();
- ObtainWriteLock(&avc->lock,94);
-#endif /* SECRETLY_OSF1 */
+ ObtainWriteLock(&avc->lock, 94);
+ if ((afs_debug & AFSDEB_VNLAYER) != 0) {
+ printf("%s exit\n", __func__);
+ }
}
/* Try to invalidate pages, for "fs flush" or "fs flushv"; or
* try to free pages, when deleting a file.
*
- * Locking: the vcache entry's lock is held. It may be dropped and
+ * Locking: the vcache entry's lock is held. It may be dropped and
* re-obtained.
*
* Since we drop and re-obtain the lock, we can't guarantee that there won't
* be some pages around when we return, newly created by concurrent activity.
*/
-void osi_VM_TryToSmush(struct vcache *avc, struct AFS_UCRED *acred, int sync)
+void
+osi_VM_TryToSmush(struct vcache *avc, afs_ucred_t *acred, int sync)
{
-#ifdef SECRETLY_OSF1
+ if ((afs_debug & AFSDEB_VNLAYER) != 0) {
+ printf("%s enter\n", __func__);
+ }
+
ReleaseWriteLock(&avc->lock);
- AFS_GUNLOCK();
- osi_ubc_flush_dirty_and_wait((struct vnode *)avc, 0);
- ubc_invalidate(((struct vnode *)avc)->v_object, 0, 0, B_INVAL);
- AFS_GLOCK();
- ObtainWriteLock(&avc->lock,59);
-#endif /* SECRETLY_OSF1 */
+ osi_VM_FlushVCache(avc, NULL);
+ ObtainWriteLock(&avc->lock, 59);
+
+ if ((afs_debug & AFSDEB_VNLAYER) != 0) {
+ printf("%s exit\n", __func__);
+ }
}
/* Purge VM for a file when its callback is revoked.
*
* Locking: No lock is held, not even the global lock.
*/
-void osi_VM_FlushPages(struct vcache *avc, struct AFS_UCRED *credp)
+void
+osi_VM_FlushPages(struct vcache *avc, afs_ucred_t *credp)
{
-#ifdef SECRETLY_OSF1
- ubc_flush_dirty(((struct vnode *)avc)->v_object, 0);
- ubc_invalidate(((struct vnode *)avc)->v_object, 0, 0, B_INVAL);
-#endif /* SECRETLY_OSF1 */
+ struct vnode *vp = AFSTOV(avc);
+
+ if ((afs_debug & AFSDEB_VNLAYER) != 0) {
+ printf("%s enter\n", __func__);
+ }
+
+ if (!vp) {
+ printf("%s NULL vp\n", __func__);
+ return;
+ }
+
+ cache_purge(vp);
+ vinvalbuf(vp, 0, credp, curlwp, false, 1);
+
+ if ((afs_debug & AFSDEB_VNLAYER) != 0) {
+ printf("%s exit\n", __func__);
+ }
}
/* Purge pages beyond end-of-file, when truncating a file.
* activeV is raised. This is supposed to block pageins, but at present
* it only works on Solaris.
*/
-void osi_VM_Truncate(struct vcache *avc, int alen, struct AFS_UCRED *acred)
+void
+osi_VM_Truncate(struct vcache *avc, voff_t alen, afs_ucred_t *acred)
{
-#ifdef SECRETLY_OSF1
- ubc_invalidate(((struct vnode *)avc)->v_object, alen,
- MAXINT - alen, B_INVAL);
-#endif /* SECRETLY_OSF1 */
+ struct vnode *vp = AFSTOV(avc);
+
+ if ((afs_debug & AFSDEB_VNLAYER) != 0) {
+ printf("%s enter\n", __func__);
+ }
+
+ vtruncbuf(vp, alen, false, 0);
+
+ if ((afs_debug & AFSDEB_VNLAYER) != 0) {
+ printf("%s exit\n", __func__);
+ }
}
git://git.openafs.org / openafs.git / blobdiff