include/vm/vnode_pager.c

82 static int vnode_pager_addr(struct vnode *vp, vm_ooffset_t address,
111 vnode_create_vobject(struct vnode *vp, off_t isize, struct thread *td)
117 	if (!vn_isdisk(vp, NULL) && vn_canvmio(vp) == FALSE)
120 	while ((object = vp->v_object) != NULL) {
126 		VOP_UNLOCK(vp, 0);
129 		vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
133 		if (vn_isdisk(vp, NULL)) {
136 			if (VOP_GETATTR(vp, &va, td->td_ucred))
142 	object = vnode_pager_alloc(vp, size, 0, 0, td->td_ucred);
145 	 * that the object is associated with the vp.
150 	vrele(vp);
152 	KASSERT(vp->v_object != NULL, ("vnode_create_vobject: NULL object"));
158 vnode_destroy_vobject(struct vnode *vp)
162 	obj = vp->v_object;
165 	ASSERT_VOP_ELOCKED(vp, "vnode_destroy_vobject");
184 			vp->v_object = NULL;
194 	KASSERT(vp->v_object == NULL, ("vp %p obj %p", vp, vp->v_object));
209 	struct vnode *vp;
217 	vp = (struct vnode *) handle;
224 	while ((object = vp->v_object) != NULL) {
232 	KASSERT(vp->v_usecount != 0, ("vnode_pager_alloc: no vnode reference"));
244 		VI_LOCK(vp);
245 		if (vp->v_object != NULL) {
249 			VI_UNLOCK(vp);
259 		vp->v_object = object;
260 		VI_UNLOCK(vp);
268 	vref(vp);
278 	struct vnode *vp;
281 	vp = object->handle;
282 	if (vp == NULL)
295 	ASSERT_VOP_ELOCKED(vp, "vnode_pager_dealloc");
298 		VOP_ADD_WRITECOUNT(vp, -1);
299 		CTR3(KTR_VFS, "%s: vp %p v_writecount decreased to %d",
300 		    __func__, vp, vp->v_writecount);
302 	vp->v_object = NULL;
303 	VOP_UNSET_TEXT(vp);
306 		vunref(vp);
314 	struct vnode *vp = object->handle;
324 	 * If no vp or vp is doomed or marked transparent to VM, we do not
327 	if (vp == NULL || vp->v_iflag & VI_DOOMED)
336 	bsize = vp->v_mount->mnt_stat.f_iosize;
346 	err = VOP_BMAP(vp, reqblock, NULL, &bn, after, before);
396 vnode_pager_setsize(struct vnode *vp, vm_ooffset_t nsize)
402 	if ((object = vp->v_object) == NULL)
404 /* 	ASSERT_VOP_ELOCKED(vp, "vnode_pager_setsize and not locked vnode"); */
485 vnode_pager_addr(struct vnode *vp, vm_ooffset_t address, daddr_t *rtaddress,
496 	if (vp->v_iflag & VI_DOOMED)
499 	bsize = vp->v_mount->mnt_stat.f_iosize;
503 	err = VOP_BMAP(vp, vblock, NULL, rtaddress, run, NULL);
523 	struct vnode *vp;
533 	vp = object->handle;
534 	if (vp->v_iflag & VI_DOOMED)
537 	bsize = vp->v_mount->mnt_stat.f_iosize;
539 	VOP_BMAP(vp, 0, &bo, 0, NULL, NULL);
554 			error = vnode_pager_addr(vp, address, &fileaddr, NULL);
571 			bp->b_vp = vp;
620 	struct vnode *vp;
634 		vp = object->handle;
653 		error = VOP_READ(vp, &auio, 0, curthread->td_ucred);
683  * backing vp's VOP_GETPAGES.
689 	struct vnode *vp;
692 	vp = object->handle;
694 	rtval = VOP_GETPAGES(vp, m, count, rbehind, rahead);
705 	struct vnode *vp;
708 	vp = object->handle;
710 	rtval = VOP_GETPAGES_ASYNC(vp, m, count, rbehind, rahead, iodone, arg);
743 vnode_pager_generic_getpages(struct vnode *vp, vm_page_t *m, int count,
754 	KASSERT(vp->v_type != VCHR && vp->v_type != VBLK,
757 	if (vp->v_iflag & VI_DOOMED)
760 	object = vp->v_object;
762 	bsize = vp->v_mount->mnt_stat.f_iosize;
766 	    ("%s: page %p offset beyond vp %p size", __func__, m[0], vp));
798 	error = VOP_BMAP(vp, foff / bsize, &bo, &bp->b_blkno, &after, &before);
839 		    count, vp));
977 	if ((vp->v_mount->mnt_kern_flag & MNTK_UNMAPPED_BUFS) != 0 &&
993 	bp->b_vp = vp;
1111  * backing vp's VOP_PUTPAGES.
1118 	struct vnode *vp;
1140 	vp = object->handle;
1142 	rtval = VOP_PUTPAGES(vp, m, bytes, flags, rtvals);
1159 vnode_pager_generic_putpages(struct vnode *vp, vm_page_t *ma, int bytecount,
1177 	object = vp->v_object;
1264 	error = VOP_WRITE(vp, &auio, ioflags, curthread->td_ucred);
1310 	struct vnode *vp;
1320 	vp = object->handle;
1322 		ASSERT_VOP_ELOCKED(vp, "v_writecount inc");
1323 		VOP_ADD_WRITECOUNT(vp, 1);
1324 		CTR3(KTR_VFS, "%s: vp %p v_writecount increased to %d",
1325 		    __func__, vp, vp->v_writecount);
1327 		ASSERT_VOP_ELOCKED(vp, "v_writecount dec");
1328 		VOP_ADD_WRITECOUNT(vp, -1);
1329 		CTR3(KTR_VFS, "%s: vp %p v_writecount decreased to %d",
1330 		    __func__, vp, vp->v_writecount);
1339 	struct vnode *vp;
1365 	vp = object->handle;
1366 	vhold(vp);
1369 	vn_start_write(vp, &mp, V_WAIT);
1370 	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
1379 	VOP_UNLOCK(vp, 0);
1380 	vdrop(vp);