#include <afsconfig.h>
#include "afs/param.h"
+#ifdef AFS_FBSD70_ENV
+#include <sys/param.h>
+#include <sys/vnode.h>
+ void
+ vgonel(struct vnode *vp, struct thread *td);
+#endif
-RCSID
- ("$Header$");
#include "afs/sysincludes.h" /* Standard vendor system headers */
#include "afsincludes.h" /* Afs-based standard headers */
#define VOP_GETVOBJECT(vp, objp) (*(objp) = (vp)->v_object)
#endif
-#ifdef AFS_FBSD50_ENV
+#if defined(AFS_FBSD80_ENV)
+#define lock_vnode(v) vn_lock((v), LK_EXCLUSIVE | LK_RETRY)
+#define unlock_vnode(v) VOP_UNLOCK((v), 0)
+#else
#define lock_vnode(v) vn_lock((v), LK_EXCLUSIVE | LK_RETRY, curthread)
#define unlock_vnode(v) VOP_UNLOCK((v), 0, curthread)
-#else
-#define lock_vnode(v) vn_lock((v), LK_EXCLUSIVE | LK_RETRY, curproc)
-#define unlock_vnode(v) VOP_UNLOCK((v), 0, curproc)
-/* need splvm() protection? */
-#define VM_OBJECT_LOCK(o)
-#define VM_OBJECT_UNLOCK(o)
#endif
/* Try to discard pages, in order to recycle a vcache entry.
* therefore obsolescent.
*
* OSF/1 Locking: VN_LOCK has been called.
- * XXX - should FreeBSD have done this, too? Certainly looks like it.
+ * We do not lock the vnode here, but instead require that it be exclusive
+ * locked by code calling osi_VM_StoreAllSegments directly, or scheduling it
+ * from the bqueue - Matt
* Maybe better to just call vnode_pager_setsize()?
*/
int
{
struct vm_object *obj;
struct vnode *vp;
- if (VREFCOUNT_GT(avc, 1))
+ if (VREFCOUNT(avc) > 1) {
return EBUSY;
+ }
- if (avc->opens)
+ /* XXX
+ * The value of avc->opens here came to be, at some point,
+ * typically -1. This was caused by incorrectly performing afs_close
+ * processing on vnodes being recycled */
+ if (avc->opens) {
return EBUSY;
+ }
/* if a lock is held, give up */
- if (CheckLock(&avc->lock))
+ if (CheckLock(&avc->lock)) {
return EBUSY;
+ }
+
+ return(0);
AFS_GUNLOCK();
vp = AFSTOV(avc);
+#ifndef AFS_FBSD70_ENV
lock_vnode(vp);
+#endif
if (VOP_GETVOBJECT(vp, &obj) == 0) {
VM_OBJECT_LOCK(obj);
vm_object_page_remove(obj, 0, 0, FALSE);
-#if 0
+#if 1
if (obj->ref_count == 0) {
- vgonel(vp, curproc);
simple_lock(&vp->v_interlock);
+ vgonel(vp, curthread);
vp->v_tag = VT_AFS;
SetAfsVnode(vp);
}
#endif
VM_OBJECT_UNLOCK(obj);
}
+#ifndef AFS_FBSD70_ENV
unlock_vnode(vp);
+#endif
AFS_GLOCK();
return 0;
*/
do {
anyio = 0;
- lock_vnode(vp);
if (VOP_GETVOBJECT(vp, &obj) == 0 && (obj->flags & OBJ_MIGHTBEDIRTY)) {
- /* XXX - obj locking? */
- unlock_vnode(vp);
-#ifdef AFS_FBSD50_ENV
if (!vget(vp, LK_EXCLUSIVE | LK_RETRY, curthread)) {
-#else
- if (!vget(vp, LK_EXCLUSIVE | LK_RETRY | LK_NOOBJ, curproc)) {
-#endif
- if (VOP_GETVOBJECT(vp, &obj) == 0) {
- VM_OBJECT_LOCK(obj);
- vm_object_page_clean(obj, 0, 0, OBJPC_SYNC);
- VM_OBJECT_UNLOCK(obj);
- anyio = 1;
+ if (VOP_GETVOBJECT(vp, &obj) == 0) {
+ VM_OBJECT_LOCK(obj);
+ vm_object_page_clean(obj, 0, 0, OBJPC_SYNC);
+ VM_OBJECT_UNLOCK(obj);
+ anyio = 1;
+ }
+ vput(vp);
}
- vput(vp);
}
- } else
- unlock_vnode(vp);
} while (anyio && (--tries > 0));
AFS_GLOCK();
ObtainWriteLock(&avc->lock, 94);
* 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)
+osi_VM_TryToSmush(struct vcache *avc, afs_ucred_t *acred, int sync)
{
struct vnode *vp;
- struct vm_object *obj;
- int anyio, tries;
+ int tries, code;
+ int islocked;
+
+ SPLVAR;
- ReleaseWriteLock(&avc->lock);
- AFS_GUNLOCK();
- tries = 5;
vp = AFSTOV(avc);
- do {
- anyio = 0;
- lock_vnode(vp);
- /* See the comments above. */
- if (VOP_GETVOBJECT(vp, &obj) == 0 && (obj->flags & OBJ_MIGHTBEDIRTY)) {
- /* XXX - obj locking */
- unlock_vnode(vp);
-#ifdef AFS_FBSD50_ENV
- if (!vget(vp, LK_EXCLUSIVE | LK_RETRY, curthread)) {
-#else
- if (!vget(vp, LK_EXCLUSIVE | LK_RETRY | LK_NOOBJ, curproc)) {
-#endif
- if (VOP_GETVOBJECT(vp, &obj) == 0) {
- VM_OBJECT_LOCK(obj);
- /*
- * Do we really want OBJPC_SYNC? OBJPC_INVAL would be
- * faster, if invalidation is really what we are being
- * asked to do. (It would make more sense, too, since
- * otherwise this function is practically identical to
- * osi_VM_StoreAllSegments().) -GAW
- */
- vm_object_page_clean(obj, 0, 0, OBJPC_SYNC);
- VM_OBJECT_UNLOCK(obj);
- anyio = 1;
- }
- vput(vp);
- }
- } else
- unlock_vnode(vp);
- } while (anyio && (--tries > 0));
- lock_vnode(vp);
- if (VOP_GETVOBJECT(vp, &obj) == 0) {
- VM_OBJECT_LOCK(obj);
- vm_object_page_remove(obj, 0, 0, FALSE);
- VM_OBJECT_UNLOCK(obj);
+
+ VI_LOCK(vp);
+ if (vp->v_iflag & VI_DOOMED) {
+ VI_UNLOCK(vp);
+ USERPRI;
+ return;
}
- unlock_vnode(vp);
- /*vinvalbuf(AFSTOV(avc),0, NOCRED, curproc, 0,0); */
- AFS_GLOCK();
- ObtainWriteLock(&avc->lock, 59);
+ VI_UNLOCK(vp);
+
+ islocked = VOP_ISLOCKED(vp);
+ if (islocked == LK_EXCLOTHER)
+ panic("Trying to Smush over someone else's lock");
+ else if (islocked == LK_SHARED) {
+ afs_warn("Trying to Smush with a shared lock");
+ vn_lock(vp, LK_UPGRADE);
+ } else if (!islocked)
+ vn_lock(vp, LK_EXCLUSIVE);
+
+ if (vp->v_bufobj.bo_object != NULL) {
+ VM_OBJECT_LOCK(vp->v_bufobj.bo_object);
+ /*
+ * Do we really want OBJPC_SYNC? OBJPC_INVAL would be
+ * faster, if invalidation is really what we are being
+ * asked to do. (It would make more sense, too, since
+ * otherwise this function is practically identical to
+ * osi_VM_StoreAllSegments().) -GAW
+ */
+
+ /*
+ * Dunno. We no longer resemble osi_VM_StoreAllSegments,
+ * though maybe that's wrong, now. And OBJPC_SYNC is the
+ * common thing in 70 file systems, it seems. Matt.
+ */
+
+ vm_object_page_clean(vp->v_bufobj.bo_object, 0, 0, OBJPC_SYNC);
+ VM_OBJECT_UNLOCK(vp->v_bufobj.bo_object);
+ }
+
+ tries = 5;
+ code = osi_vinvalbuf(vp, V_SAVE, PCATCH, 0);
+ while (code && (tries > 0)) {
+ afs_warn("TryToSmush retrying vinvalbuf");
+ code = osi_vinvalbuf(vp, V_SAVE, PCATCH, 0);
+ --tries;
+ }
+ if (islocked == LK_SHARED)
+ vn_lock(vp, LK_DOWNGRADE);
+ else if (!islocked)
+ VOP_UNLOCK(vp, 0);
+ USERPRI;
}
/* 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)
+osi_VM_FlushPages(struct vcache *avc, afs_ucred_t *credp)
{
struct vnode *vp;
struct vm_object *obj;
vm_object_page_remove(obj, 0, 0, FALSE);
VM_OBJECT_UNLOCK(obj);
}
- /*vinvalbuf(AFSTOV(avc),0, NOCRED, curproc, 0,0); */
+ osi_vinvalbuf(vp, 0, 0, 0);
}
/* Purge pages beyond end-of-file, when truncating a file.
* it only works on Solaris.
*/
void
-osi_VM_Truncate(struct vcache *avc, int alen, struct AFS_UCRED *acred)
+osi_VM_Truncate(struct vcache *avc, int alen, afs_ucred_t *acred)
{
vnode_pager_setsize(AFSTOV(avc), alen);
}
git://git.openafs.org / openafs.git / blobdiff