-/* -*- 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.
/*
* Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2012, Whamcloud, Inc.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
*/
#define DEBUG_SUBSYSTEM S_CLASS
-#ifndef EXPORT_SYMTAB
-# define EXPORT_SYMTAB
-#endif
#include <libcfs/libcfs.h>
#include <obd_class.h>
*/
int cl_page_gang_lookup(const struct lu_env *env, struct cl_object *obj,
struct cl_io *io, pgoff_t start, pgoff_t end,
- struct cl_page_list *queue)
+ cl_page_gang_cb_t cb, void *cbdata)
{
struct cl_object_header *hdr;
struct cl_page *page;
*/
cl_page_get_trust(page);
lu_ref_add_atomic(&page->cp_reference,
- "page_list", cfs_current());
+ "gang_lookup", cfs_current());
pvec[j++] = page;
}
for (i = 0; i < j; ++i) {
page = pvec[i];
- if (res == CLP_GANG_OKAY) {
- typeof(cl_page_own) *page_own;
-
- page_own = queue->pl_nr ?
- cl_page_own_try : cl_page_own;
- if (page_own(env, io, page) == 0) {
- cl_page_list_add(queue, page);
- } else if (page->cp_state != CPS_FREEING) {
- /* cl_page_own() won't fail unless
- * the page is being freed. */
- LASSERT(queue->pl_nr != 0);
- res = CLP_GANG_AGAIN;
- }
- }
+ if (res == CLP_GANG_OKAY)
+ res = (*cb)(env, io, page, cbdata);
lu_ref_del(&page->cp_reference,
- "page_list", cfs_current());
+ "gang_lookup", cfs_current());
cl_page_put(env, page);
}
if (nr < CLT_PVEC_SIZE || end_of_region)
break;
- /* if the number of pages is zero, this will mislead the caller
- * that there is no page any more. */
- if (queue->pl_nr && cfs_need_resched())
+ if (res == CLP_GANG_OKAY && cfs_need_resched())
res = CLP_GANG_RESCHED;
if (res != CLP_GANG_OKAY)
break;
struct cl_site *site = cl_object_site(o);
int err;
- LINVRNT(type == CPT_CACHEABLE || type == CPT_TRANSIENT);
+ LASSERT(type == CPT_CACHEABLE || type == CPT_TRANSIENT);
cfs_might_sleep();
ENTRY;
* Either page is early in initialization (has neither child
* nor parent yet), or it is in the object radix tree.
*/
- ergo(pg->cp_state < CPS_FREEING,
+ ergo(pg->cp_state < CPS_FREEING && pg->cp_type == CPT_CACHEABLE,
(void *)radix_tree_lookup(&header->coh_tree,
pg->cp_index) == pg ||
(child == NULL && parent == NULL));
static void cl_page_state_set(const struct lu_env *env,
struct cl_page *page, enum cl_page_state state)
{
- PINVRNT(env, page, cl_page_invariant(page));
cl_page_state_set0(env, page, state);
}
void cl_page_assume(const struct lu_env *env,
struct cl_io *io, struct cl_page *pg)
{
- PASSERT(env, pg, pg->cp_state < CPS_OWNED);
- PASSERT(env, pg, pg->cp_owner == NULL);
PINVRNT(env, pg, cl_object_same(pg->cp_obj, io->ci_obj));
- PINVRNT(env, pg, cl_page_invariant(pg));
ENTRY;
pg = cl_page_top(pg);
io = cl_io_top(io);
cl_page_invoid(env, io, pg, CL_PAGE_OP(cpo_assume));
+ PASSERT(env, pg, pg->cp_owner == NULL);
pg->cp_owner = io;
pg->cp_task = current;
cl_page_owner_set(pg);
/* cl_page::cp_req already cleared by the caller (osc_completion()) */
PASSERT(env, pg, pg->cp_req == NULL);
PASSERT(env, pg, pg->cp_state == cl_req_type_state(crt));
- PINVRNT(env, pg, cl_page_invariant(pg));
ENTRY;
CL_PAGE_HEADER(D_TRACE, env, pg, "%d %d\n", crt, ioret);
(const struct lu_env *,
const struct cl_page_slice *, int), ioret);
if (anchor) {
+ LASSERT(cl_page_is_vmlocked(env, pg));
LASSERT(pg->cp_sync_io == anchor);
pg->cp_sync_io = NULL;
cl_sync_io_note(anchor, ioret);
* its queues.
*
* \pre cl_page_is_owned(pg, io)
- * \post ergo(result == 0,
- * pg->cp_state == CPS_PAGEIN || pg->cp_state == CPS_PAGEOUT)
+ * \post cl_page_is_owned(pg, io)
*
* \see cl_page_operations::cpo_cache_add()
*/
int cl_page_cache_add(const struct lu_env *env, struct cl_io *io,
struct cl_page *pg, enum cl_req_type crt)
{
- int result;
+ const struct cl_page_slice *scan;
+ int result = 0;
- PINVRNT(env, pg, crt < CRT_NR);
- PINVRNT(env, pg, cl_page_is_owned(pg, io));
- PINVRNT(env, pg, cl_page_invariant(pg));
+ PINVRNT(env, pg, crt < CRT_NR);
+ PINVRNT(env, pg, cl_page_is_owned(pg, io));
+ PINVRNT(env, pg, cl_page_invariant(pg));
- ENTRY;
- result = cl_page_invoke(env, io, pg, CL_PAGE_OP(io[crt].cpo_cache_add));
- if (result == 0) {
- cl_page_owner_clear(pg);
- cl_page_state_set(env, pg, CPS_CACHED);
- }
- CL_PAGE_HEADER(D_TRACE, env, pg, "%d %d\n", crt, result);
- RETURN(result);
+ ENTRY;
+
+ cfs_list_for_each_entry(scan, &pg->cp_layers, cpl_linkage) {
+ if (scan->cpl_ops->io[crt].cpo_cache_add == NULL)
+ continue;
+
+ result = scan->cpl_ops->io[crt].cpo_cache_add(env, scan, io);
+ if (result != 0)
+ break;
+ }
+ CL_PAGE_HEADER(D_TRACE, env, pg, "%d %d\n", crt, result);
+ RETURN(result);
}
EXPORT_SYMBOL(cl_page_cache_add);
/**
+ * Called if a pge is being written back by kernel's intention.
+ *
+ * \pre cl_page_is_owned(pg, io)
+ * \post ergo(result == 0, pg->cp_state == CPS_PAGEOUT)
+ *
+ * \see cl_page_operations::cpo_flush()
+ */
+int cl_page_flush(const struct lu_env *env, struct cl_io *io,
+ struct cl_page *pg)
+{
+ int result;
+
+ PINVRNT(env, pg, cl_page_is_owned(pg, io));
+ PINVRNT(env, pg, cl_page_invariant(pg));
+
+ ENTRY;
+
+ result = cl_page_invoke(env, io, pg, CL_PAGE_OP(cpo_flush));
+
+ CL_PAGE_HEADER(D_TRACE, env, pg, "%d\n", result);
+ RETURN(result);
+}
+EXPORT_SYMBOL(cl_page_flush);
+
+/**
* Checks whether page is protected by any extent lock is at least required
* mode.
*
}
EXPORT_SYMBOL(cl_page_is_under_lock);
+static int page_prune_cb(const struct lu_env *env, struct cl_io *io,
+ struct cl_page *page, void *cbdata)
+{
+ cl_page_own(env, io, page);
+ cl_page_unmap(env, io, page);
+ cl_page_discard(env, io, page);
+ cl_page_disown(env, io, page);
+ return CLP_GANG_OKAY;
+}
+
/**
* Purges all cached pages belonging to the object \a obj.
*/
struct cl_thread_info *info;
struct cl_object *obj = cl_object_top(clobj);
struct cl_io *io;
- struct cl_page_list *plist;
int result;
ENTRY;
info = cl_env_info(env);
- plist = &info->clt_list;
io = &info->clt_io;
/*
* function, we just make cl_page_list functions happy. -jay
*/
io->ci_obj = obj;
+ io->ci_ignore_layout = 1;
result = cl_io_init(env, io, CIT_MISC, obj);
if (result != 0) {
cl_io_fini(env, io);
}
do {
- cl_page_list_init(plist);
result = cl_page_gang_lookup(env, obj, io, 0, CL_PAGE_EOF,
- plist);
- /*
- * Since we're purging the pages of an object, we don't care
- * the possible outcomes of the following functions.
- */
- cl_page_list_unmap(env, io, plist);
- cl_page_list_discard(env, io, plist);
- cl_page_list_disown(env, io, plist);
- cl_page_list_fini(env, plist);
-
+ page_prune_cb, NULL);
if (result == CLP_GANG_RESCHED)
cfs_cond_resched();
} while (result != CLP_GANG_OKAY);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff