-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
+/*
* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
* GPL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
+ * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2012, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
static void lov_page_fini(const struct lu_env *env,
struct cl_page_slice *slice)
{
- struct lov_page *lp = cl2lov_page(slice);
struct cl_page *sub = lov_sub_page(slice);
LINVRNT(lov_page_invariant(slice));
slice->cpl_page->cp_child = NULL;
cl_page_put(env, sub);
}
- OBD_SLAB_FREE_PTR(lp, lov_page_kmem);
EXIT;
}
lov_page_own(env, slice, io, 0);
}
+static int lov_page_cache_add(const struct lu_env *env,
+ const struct cl_page_slice *slice,
+ struct cl_io *io)
+{
+ struct lov_io *lio = lov_env_io(env);
+ struct lov_io_sub *sub;
+ int rc = 0;
+
+ LINVRNT(lov_page_invariant(slice));
+ LINVRNT(!cl2lov_page(slice)->lps_invalid);
+ ENTRY;
+
+ sub = lov_page_subio(env, lio, slice);
+ if (!IS_ERR(sub)) {
+ rc = cl_page_cache_add(sub->sub_env, sub->sub_io,
+ slice->cpl_page->cp_child, CRT_WRITE);
+ lov_sub_put(sub);
+ } else {
+ rc = PTR_ERR(sub);
+ CL_PAGE_DEBUG(D_ERROR, env, slice->cpl_page, "rc = %d\n", rc);
+ }
+ RETURN(rc);
+}
+
static int lov_page_print(const struct lu_env *env,
const struct cl_page_slice *slice,
void *cookie, lu_printer_t printer)
.cpo_fini = lov_page_fini,
.cpo_own = lov_page_own,
.cpo_assume = lov_page_assume,
+ .io = {
+ [CRT_WRITE] = {
+ .cpo_cache_add = lov_page_cache_add
+ }
+ },
.cpo_print = lov_page_print
};
static void lov_empty_page_fini(const struct lu_env *env,
struct cl_page_slice *slice)
{
- struct lov_page *lp = cl2lov_page(slice);
-
LASSERT(slice->cpl_page->cp_child == NULL);
- ENTRY;
- OBD_SLAB_FREE_PTR(lp, lov_page_kmem);
- EXIT;
}
-struct cl_page *lov_page_init_raid0(const struct lu_env *env,
- struct cl_object *obj, struct cl_page *page,
- cfs_page_t *vmpage)
+int lov_page_init_raid0(const struct lu_env *env, struct cl_object *obj,
+ struct cl_page *page, cfs_page_t *vmpage)
{
- struct lov_page *lpg;
struct lov_object *loo = cl2lov(obj);
- int result;
-
+ struct lov_layout_raid0 *r0 = lov_r0(loo);
+ struct lov_io *lio = lov_env_io(env);
+ struct cl_page *subpage;
+ struct cl_object *subobj;
+ struct lov_io_sub *sub;
+ struct lov_page *lpg = cl_object_page_slice(obj, page);
+ loff_t offset;
+ obd_off suboff;
+ int stripe;
+ int rc;
ENTRY;
- OBD_SLAB_ALLOC_PTR_GFP(lpg, lov_page_kmem, CFS_ALLOC_IO);
- if (lpg != NULL) {
- loff_t offset;
- int stripe;
- obd_off suboff;
- struct cl_page *subpage;
- struct cl_object *subobj;
- struct lov_layout_raid0 *r0 = lov_r0(loo);
-
- offset = cl_offset(obj, page->cp_index);
- stripe = lov_stripe_number(r0->lo_lsm, offset);
- result = lov_stripe_offset(r0->lo_lsm, offset, stripe,
- &suboff);
- LASSERT(stripe < r0->lo_nr);
- LASSERT(result == 0);
-
- subobj = lovsub2cl(r0->lo_sub[stripe]);
- subpage = cl_page_find(env, subobj,
- cl_index(subobj, suboff), vmpage,
- page->cp_type);
- if (!IS_ERR(subpage)) {
- if (subpage->cp_parent != NULL) {
- /*
- * This is only possible when TRANSIENT page
- * is being created, and CACHEABLE sub-page
- * (attached to already existing top-page) has
- * been found. Tell cl_page_find() to use
- * existing page.
- */
- LASSERT(subpage->cp_type == CPT_CACHEABLE);
- LASSERT(page->cp_type == CPT_TRANSIENT);
- lpg->lps_invalid = 1;
- cl_page_put(env, subpage);
- /*
- * XXX This assumes that lov is in the topmost
- * cl_page.
- */
- result = PTR_ERR(cl_page_top(subpage));
- } else {
- lu_ref_add(&subpage->cp_reference, "lov", page);
- subpage->cp_parent = page;
- page->cp_child = subpage;
- }
- cl_page_slice_add(page, &lpg->lps_cl,
- obj, &lov_page_ops);
- } else
- result = PTR_ERR(subpage);
- } else
- result = -ENOMEM;
- RETURN(ERR_PTR(result));
+
+ offset = cl_offset(obj, page->cp_index);
+ stripe = lov_stripe_number(loo->lo_lsm, offset);
+ LASSERT(stripe < r0->lo_nr);
+ rc = lov_stripe_offset(loo->lo_lsm, offset, stripe,
+ &suboff);
+ LASSERT(rc == 0);
+
+ lpg->lps_invalid = 1;
+ cl_page_slice_add(page, &lpg->lps_cl, obj, &lov_page_ops);
+
+ sub = lov_sub_get(env, lio, stripe);
+ if (IS_ERR(sub))
+ GOTO(out, rc = PTR_ERR(sub));
+
+ subobj = lovsub2cl(r0->lo_sub[stripe]);
+ subpage = cl_page_find_sub(sub->sub_env, subobj,
+ cl_index(subobj, suboff), vmpage, page);
+ lov_sub_put(sub);
+ if (IS_ERR(subpage))
+ GOTO(out, rc = PTR_ERR(subpage));
+
+ if (likely(subpage->cp_parent == page)) {
+ lu_ref_add(&subpage->cp_reference, "lov", page);
+ lpg->lps_invalid = 0;
+ rc = 0;
+ } else {
+ CL_PAGE_DEBUG(D_ERROR, env, page, "parent page\n");
+ CL_PAGE_DEBUG(D_ERROR, env, subpage, "child page\n");
+ LASSERT(0);
+ }
+
+ EXIT;
+out:
+ return rc;
}
.cpo_print = lov_page_print
};
-struct cl_page *lov_page_init_empty(const struct lu_env *env,
- struct cl_object *obj, struct cl_page *page,
- cfs_page_t *vmpage)
+int lov_page_init_empty(const struct lu_env *env, struct cl_object *obj,
+ struct cl_page *page, cfs_page_t *vmpage)
{
- struct lov_page *lpg;
- int result = -ENOMEM;
+ struct lov_page *lpg = cl_object_page_slice(obj, page);
+ void *addr;
ENTRY;
- OBD_SLAB_ALLOC_PTR_GFP(lpg, lov_page_kmem, CFS_ALLOC_IO);
- if (lpg != NULL) {
- void *addr;
- cl_page_slice_add(page, &lpg->lps_cl,
- obj, &lov_empty_page_ops);
- addr = cfs_kmap(vmpage);
- memset(addr, 0, cl_page_size(obj));
- cfs_kunmap(vmpage);
- cl_page_export(env, page, 1);
- result = 0;
- }
- RETURN(ERR_PTR(result));
+ cl_page_slice_add(page, &lpg->lps_cl, obj, &lov_empty_page_ops);
+ addr = cfs_kmap(vmpage);
+ memset(addr, 0, cl_page_size(obj));
+ cfs_kunmap(vmpage);
+ cl_page_export(env, page, 1);
+ RETURN(0);
}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff