* Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
- * Copyright (c) 2011, 2012, Intel Corporation.
+ * Copyright (c) 2011, 2013, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
static void vvp_page_fini_common(struct ccc_page *cp)
{
- cfs_page_t *vmpage = cp->cpg_page;
+ struct page *vmpage = cp->cpg_page;
- LASSERT(vmpage != NULL);
- page_cache_release(vmpage);
- OBD_SLAB_FREE_PTR(cp, vvp_page_kmem);
+ LASSERT(vmpage != NULL);
+ page_cache_release(vmpage);
}
static void vvp_page_fini(const struct lu_env *env,
- struct cl_page_slice *slice)
+ struct cl_page_slice *slice)
{
- struct ccc_page *cp = cl2ccc_page(slice);
- cfs_page_t *vmpage = cp->cpg_page;
+ struct ccc_page *cp = cl2ccc_page(slice);
+ struct page *vmpage = cp->cpg_page;
- /*
- * vmpage->private was already cleared when page was moved into
- * VPG_FREEING state.
- */
- LASSERT((struct cl_page *)vmpage->private != slice->cpl_page);
- vvp_page_fini_common(cp);
+ /*
+ * vmpage->private was already cleared when page was moved into
+ * VPG_FREEING state.
+ */
+ LASSERT((struct cl_page *)vmpage->private != slice->cpl_page);
+ vvp_page_fini_common(cp);
}
static int vvp_page_own(const struct lu_env *env,
const struct cl_page_slice *slice, struct cl_io *io,
int nonblock)
{
- struct ccc_page *vpg = cl2ccc_page(slice);
- cfs_page_t *vmpage = vpg->cpg_page;
+ struct ccc_page *vpg = cl2ccc_page(slice);
+ struct page *vmpage = vpg->cpg_page;
LASSERT(vmpage != NULL);
if (nonblock) {
}
static void vvp_page_assume(const struct lu_env *env,
- const struct cl_page_slice *slice,
- struct cl_io *unused)
+ const struct cl_page_slice *slice,
+ struct cl_io *unused)
{
- cfs_page_t *vmpage = cl2vm_page(slice);
+ struct page *vmpage = cl2vm_page(slice);
- LASSERT(vmpage != NULL);
- LASSERT(PageLocked(vmpage));
- wait_on_page_writeback(vmpage);
+ LASSERT(vmpage != NULL);
+ LASSERT(PageLocked(vmpage));
+ wait_on_page_writeback(vmpage);
}
static void vvp_page_unassume(const struct lu_env *env,
- const struct cl_page_slice *slice,
- struct cl_io *unused)
+ const struct cl_page_slice *slice,
+ struct cl_io *unused)
{
- cfs_page_t *vmpage = cl2vm_page(slice);
+ struct page *vmpage = cl2vm_page(slice);
- LASSERT(vmpage != NULL);
- LASSERT(PageLocked(vmpage));
+ LASSERT(vmpage != NULL);
+ LASSERT(PageLocked(vmpage));
}
static void vvp_page_disown(const struct lu_env *env,
- const struct cl_page_slice *slice, struct cl_io *io)
+ const struct cl_page_slice *slice, struct cl_io *io)
{
- cfs_page_t *vmpage = cl2vm_page(slice);
+ struct page *vmpage = cl2vm_page(slice);
- LASSERT(vmpage != NULL);
- LASSERT(PageLocked(vmpage));
+ LASSERT(vmpage != NULL);
+ LASSERT(PageLocked(vmpage));
- unlock_page(cl2vm_page(slice));
+ unlock_page(cl2vm_page(slice));
}
static void vvp_page_discard(const struct lu_env *env,
const struct cl_page_slice *slice,
struct cl_io *unused)
{
- cfs_page_t *vmpage = cl2vm_page(slice);
- struct address_space *mapping = vmpage->mapping;
- struct ccc_page *cpg = cl2ccc_page(slice);
+ struct page *vmpage = cl2vm_page(slice);
+ struct address_space *mapping;
+ struct ccc_page *cpg = cl2ccc_page(slice);
+ __u64 offset;
- LASSERT(vmpage != NULL);
- LASSERT(PageLocked(vmpage));
+ LASSERT(vmpage != NULL);
+ LASSERT(PageLocked(vmpage));
- if (cpg->cpg_defer_uptodate && !cpg->cpg_ra_used)
- ll_ra_stats_inc(mapping, RA_STAT_DISCARDED);
+ mapping = vmpage->mapping;
- /*
- * truncate_complete_page() calls
- * a_ops->invalidatepage()->cl_page_delete()->vvp_page_delete().
- */
- truncate_complete_page(mapping, vmpage);
-}
+ if (cpg->cpg_defer_uptodate && !cpg->cpg_ra_used)
+ ll_ra_stats_inc(mapping, RA_STAT_DISCARDED);
-static int vvp_page_unmap(const struct lu_env *env,
- const struct cl_page_slice *slice,
- struct cl_io *unused)
-{
- cfs_page_t *vmpage = cl2vm_page(slice);
- __u64 offset = vmpage->index << CFS_PAGE_SHIFT;
+ offset = vmpage->index << PAGE_SHIFT;
+ ll_teardown_mmaps(vmpage->mapping, offset, offset + PAGE_SIZE);
- LASSERT(vmpage != NULL);
- LASSERT(PageLocked(vmpage));
- /*
- * XXX is it safe to call this with the page lock held?
- */
- ll_teardown_mmaps(vmpage->mapping, offset, offset + CFS_PAGE_SIZE);
- return 0;
+ /*
+ * truncate_complete_page() calls
+ * a_ops->invalidatepage()->cl_page_delete()->vvp_page_delete().
+ */
+ truncate_complete_page(mapping, vmpage);
}
static void vvp_page_delete(const struct lu_env *env,
const struct cl_page_slice *slice)
{
- cfs_page_t *vmpage = cl2vm_page(slice);
- struct inode *inode = vmpage->mapping->host;
- struct cl_object *obj = slice->cpl_obj;
-
- LASSERT(PageLocked(vmpage));
- LASSERT((struct cl_page *)vmpage->private == slice->cpl_page);
- LASSERT(inode == ccc_object_inode(obj));
+ struct page *vmpage = cl2vm_page(slice);
+ struct inode *inode = vmpage->mapping->host;
+ struct cl_object *obj = slice->cpl_obj;
+ struct cl_page *page = slice->cpl_page;
+ int refc;
- vvp_write_complete(cl2ccc(obj), cl2ccc_page(slice));
- ClearPagePrivate(vmpage);
- vmpage->private = 0;
- /*
- * Reference from vmpage to cl_page is removed, but the reference back
- * is still here. It is removed later in vvp_page_fini().
- */
+ LASSERT(PageLocked(vmpage));
+ LASSERT((struct cl_page *)vmpage->private == page);
+ LASSERT(inode == ccc_object_inode(obj));
+
+ vvp_write_complete(cl2ccc(obj), cl2ccc_page(slice));
+
+ /* Drop the reference count held in vvp_page_init */
+ refc = atomic_dec_return(&page->cp_ref);
+ LASSERTF(refc >= 1, "page = %p, refc = %d\n", page, refc);
+
+ ClearPageUptodate(vmpage);
+ ClearPagePrivate(vmpage);
+ vmpage->private = 0;
+ /*
+ * Reference from vmpage to cl_page is removed, but the reference back
+ * is still here. It is removed later in vvp_page_fini().
+ */
}
static void vvp_page_export(const struct lu_env *env,
- const struct cl_page_slice *slice,
- int uptodate)
+ const struct cl_page_slice *slice,
+ int uptodate)
{
- cfs_page_t *vmpage = cl2vm_page(slice);
+ struct page *vmpage = cl2vm_page(slice);
- LASSERT(vmpage != NULL);
- LASSERT(PageLocked(vmpage));
- if (uptodate)
- SetPageUptodate(vmpage);
- else
- ClearPageUptodate(vmpage);
+ LASSERT(vmpage != NULL);
+ LASSERT(PageLocked(vmpage));
+ if (uptodate)
+ SetPageUptodate(vmpage);
+ else
+ ClearPageUptodate(vmpage);
}
static int vvp_page_is_vmlocked(const struct lu_env *env,
const struct cl_page_slice *slice,
struct cl_io *unused)
{
- cfs_page_t *vmpage = cl2vm_page(slice);
+ struct page *vmpage = cl2vm_page(slice);
LASSERT(PageLocked(vmpage));
LASSERT(!PageDirty(vmpage));
* This takes inode as a separate argument, because inode on which error is to
* be set can be different from \a vmpage inode in case of direct-io.
*/
-static void vvp_vmpage_error(struct inode *inode, cfs_page_t *vmpage, int ioret)
+static void vvp_vmpage_error(struct inode *inode, struct page *vmpage, int ioret)
{
struct ccc_object *obj = cl_inode2ccc(inode);
int ioret)
{
struct ccc_page *cp = cl2ccc_page(slice);
- cfs_page_t *vmpage = cp->cpg_page;
+ struct page *vmpage = cp->cpg_page;
struct cl_page *page = cl_page_top(slice->cpl_page);
struct inode *inode = ccc_object_inode(page->cp_obj);
ENTRY;
const struct cl_page_slice *slice,
int ioret)
{
- struct ccc_page *cp = cl2ccc_page(slice);
- struct cl_page *pg = slice->cpl_page;
- cfs_page_t *vmpage = cp->cpg_page;
- ENTRY;
+ struct ccc_page *cp = cl2ccc_page(slice);
+ struct cl_page *pg = slice->cpl_page;
+ struct page *vmpage = cp->cpg_page;
+ ENTRY;
LASSERT(ergo(pg->cp_sync_io != NULL, PageLocked(vmpage)));
LASSERT(PageWriteback(vmpage));
static int vvp_page_make_ready(const struct lu_env *env,
const struct cl_page_slice *slice)
{
- cfs_page_t *vmpage = cl2vm_page(slice);
+ struct page *vmpage = cl2vm_page(slice);
struct cl_page *pg = slice->cpl_page;
int result = 0;
const struct cl_page_slice *slice,
void *cookie, lu_printer_t printer)
{
- struct ccc_page *vp = cl2ccc_page(slice);
- cfs_page_t *vmpage = vp->cpg_page;
+ struct ccc_page *vp = cl2ccc_page(slice);
+ struct page *vmpage = vp->cpg_page;
(*printer)(env, cookie, LUSTRE_VVP_NAME"-page@%p(%d:%d:%d) "
"vm@%p ",
.cpo_vmpage = ccc_page_vmpage,
.cpo_discard = vvp_page_discard,
.cpo_delete = vvp_page_delete,
- .cpo_unmap = vvp_page_unmap,
.cpo_export = vvp_page_export,
.cpo_is_vmlocked = vvp_page_is_vmlocked,
.cpo_fini = vvp_page_fini,
}
};
-struct cl_page *vvp_page_init(const struct lu_env *env, struct cl_object *obj,
- struct cl_page *page, cfs_page_t *vmpage)
+int vvp_page_init(const struct lu_env *env, struct cl_object *obj,
+ struct cl_page *page, struct page *vmpage)
{
- struct ccc_page *cpg;
- int result;
+ struct ccc_page *cpg = cl_object_page_slice(obj, page);
CLOBINVRNT(env, obj, ccc_object_invariant(obj));
- OBD_SLAB_ALLOC_PTR_GFP(cpg, vvp_page_kmem, CFS_ALLOC_IO);
- if (cpg != NULL) {
- cpg->cpg_page = vmpage;
- page_cache_get(vmpage);
-
- CFS_INIT_LIST_HEAD(&cpg->cpg_pending_linkage);
- if (page->cp_type == CPT_CACHEABLE) {
- SetPagePrivate(vmpage);
- vmpage->private = (unsigned long)page;
- cl_page_slice_add(page, &cpg->cpg_cl, obj,
- &vvp_page_ops);
- } else {
- struct ccc_object *clobj = cl2ccc(obj);
-
- LASSERT(!mutex_trylock(&clobj->cob_inode->i_mutex));
- cl_page_slice_add(page, &cpg->cpg_cl, obj,
- &vvp_transient_page_ops);
- clobj->cob_transient_pages++;
- }
- result = 0;
- } else
- result = -ENOMEM;
- return ERR_PTR(result);
+ cpg->cpg_page = vmpage;
+ page_cache_get(vmpage);
+
+ CFS_INIT_LIST_HEAD(&cpg->cpg_pending_linkage);
+ if (page->cp_type == CPT_CACHEABLE) {
+ /* in cache, decref in vvp_page_delete */
+ atomic_inc(&page->cp_ref);
+ SetPagePrivate(vmpage);
+ vmpage->private = (unsigned long)page;
+ cl_page_slice_add(page, &cpg->cpg_cl, obj,
+ &vvp_page_ops);
+ } else {
+ struct ccc_object *clobj = cl2ccc(obj);
+
+ LASSERT(!mutex_trylock(&clobj->cob_inode->i_mutex));
+ cl_page_slice_add(page, &cpg->cpg_cl, obj,
+ &vvp_transient_page_ops);
+ clobj->cob_transient_pages++;
+ }
+ return 0;
}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff