-/* -*- 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.
*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
+ * http://www.gnu.org/licenses/gpl-2.0.html
*
* 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, 2017, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* Implementation of cl_page for VVP layer.
*
* Author: Nikita Danilov <nikita.danilov@sun.com>
+ * Author: Jinshan Xiong <jinshan.xiong@whamcloud.com>
*/
#define DEBUG_SUBSYSTEM S_LLITE
-#ifndef __KERNEL__
-# error This file is kernel only.
-#endif
-
-#include <obd.h>
-#include <lustre_lite.h>
+#include <linux/atomic.h>
+#include <linux/bitops.h>
+#include <linux/mm.h>
+#include <linux/mutex.h>
+#include <linux/page-flags.h>
+#include <linux/pagemap.h>
+#include <libcfs/libcfs.h>
+#include "llite_internal.h"
#include "vvp_internal.h"
/*****************************************************************************
*
*/
-static void vvp_page_fini_common(struct ccc_page *cp)
+static void vvp_page_fini_common(struct vvp_page *vpg, struct pagevec *pvec)
{
- cfs_page_t *vmpage = cp->cpg_page;
-
- LASSERT(vmpage != NULL);
- page_cache_release(vmpage);
- OBD_SLAB_FREE_PTR(cp, vvp_page_kmem);
+ struct page *vmpage = vpg->vpg_page;
+
+ LASSERT(vmpage != NULL);
+ if (pvec) {
+ if (!pagevec_add(pvec, vmpage))
+ pagevec_release(pvec);
+ } else {
+ put_page(vmpage);
+ }
}
static void vvp_page_fini(const struct lu_env *env,
- struct cl_page_slice *slice)
+ struct cl_page_slice *slice,
+ struct pagevec *pvec)
{
- struct ccc_page *cp = cl2ccc_page(slice);
- cfs_page_t *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);
+ struct vvp_page *vpg = cl2vvp_page(slice);
+ struct page *vmpage = vpg->vpg_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(vpg, pvec);
}
-static void vvp_page_own(const struct lu_env *env,
- const struct cl_page_slice *slice, struct cl_io *_)
+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 vvp_page *vpg = cl2vvp_page(slice);
+ struct page *vmpage = vpg->vpg_page;
- LASSERT(vmpage != NULL);
- lock_page(vmpage);
- wait_on_page_writeback(vmpage);
+ LASSERT(vmpage != NULL);
+ if (nonblock) {
+ if (!trylock_page(vmpage))
+ return -EAGAIN;
+
+ if (unlikely(PageWriteback(vmpage))) {
+ unlock_page(vmpage);
+ return -EAGAIN;
+ }
+
+ return 0;
+ }
+
+ lock_page(vmpage);
+ wait_on_page_writeback(vmpage);
+
+ return 0;
}
static void vvp_page_assume(const struct lu_env *env,
- const struct cl_page_slice *slice, struct cl_io *_)
+ 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 *_)
+ 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 *_)
+ 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 vvp_page *vpg = cl2vvp_page(slice);
- 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);
+ if (vpg->vpg_defer_uptodate && !vpg->vpg_ra_used)
+ ll_ra_stats_inc(vmpage->mapping->host, RA_STAT_DISCARDED);
- /*
- * truncate_complete_page() calls
- * a_ops->invalidatepage()->cl_page_delete()->vvp_page_delete().
- */
- truncate_complete_page(mapping, vmpage);
-}
-
-static int vvp_page_unmap(const struct lu_env *env,
- const struct cl_page_slice *slice, struct cl_io *_)
-{
- cfs_page_t *vmpage = cl2vm_page(slice);
- __u64 offset = vmpage->index << CFS_PAGE_SHIFT;
-
- 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;
+ generic_error_remove_page(vmpage->mapping, vmpage);
}
static void vvp_page_delete(const struct lu_env *env,
- const struct cl_page_slice *slice)
+ 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));
-
- 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().
- */
+ 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;
+
+ LASSERT(PageLocked(vmpage));
+ LASSERT((struct cl_page *)vmpage->private == page);
+ LASSERT(inode == vvp_object_inode(obj));
+
+ /* 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);
+
+ 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)
+ const struct cl_page_slice *slice,
+ int uptodate)
{
- cfs_page_t *vmpage = cl2vm_page(slice);
-
- LASSERT(vmpage != NULL);
- LASSERT(PageLocked(vmpage));
- SetPageUptodate(vmpage);
+ struct page *vmpage = cl2vm_page(slice);
+
+ LASSERT(vmpage != NULL);
+ LASSERT(PageLocked(vmpage));
+ if (uptodate)
+ SetPageUptodate(vmpage);
+ else
+ ClearPageUptodate(vmpage);
}
static int vvp_page_is_vmlocked(const struct lu_env *env,
static int vvp_page_prep_read(const struct lu_env *env,
const struct cl_page_slice *slice,
- struct cl_io *_)
+ struct cl_io *unused)
{
ENTRY;
/* Skip the page already marked as PG_uptodate. */
static int vvp_page_prep_write(const struct lu_env *env,
const struct cl_page_slice *slice,
- struct cl_io *_)
+ struct cl_io *unused)
{
- cfs_page_t *vmpage = cl2vm_page(slice);
- int result;
-
- if (clear_page_dirty_for_io(vmpage)) {
- set_page_writeback(vmpage);
- result = 0;
- } else
- result = -EALREADY;
- return result;
+ struct page *vmpage = cl2vm_page(slice);
+ struct cl_page *pg = slice->cpl_page;
+
+ LASSERT(PageLocked(vmpage));
+ LASSERT(!PageDirty(vmpage));
+
+ /* ll_writepage path is not a sync write, so need to set page writeback
+ * flag */
+ if (pg->cp_sync_io == NULL)
+ set_page_writeback(vmpage);
+
+ return 0;
}
/**
* 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)
{
- if (ioret == 0)
- ClearPageError(vmpage);
- else if (ioret != -EINTR) {
- SetPageError(vmpage);
- if (ioret == -ENOSPC)
- set_bit(AS_ENOSPC, &inode->i_mapping->flags);
- else
- set_bit(AS_EIO, &inode->i_mapping->flags);
- }
-}
-
-static void vvp_page_completion_common(const struct lu_env *env,
- struct ccc_page *cp, int ioret)
-{
- struct cl_page *clp = cp->cpg_cl.cpl_page;
- cfs_page_t *vmpage = cp->cpg_page;
- struct inode *inode = ccc_object_inode(clp->cp_obj);
- struct cl_sync_io *anchor = cp->cpg_sync_io;
-
- LINVRNT(cl_page_is_vmlocked(env, clp));
- KLASSERT(!PageWriteback(vmpage));
-
- vvp_vmpage_error(inode, vmpage, ioret);
-
- if (anchor != NULL) {
- cp->cpg_sync_io = NULL;
- cl_sync_io_note(anchor, ioret);
- } else if (clp->cp_type == CPT_CACHEABLE)
- unlock_page(vmpage);
+ struct vvp_object *obj = cl_inode2vvp(inode);
+
+ if (ioret == 0) {
+ ClearPageError(vmpage);
+ obj->vob_discard_page_warned = 0;
+ } else {
+ SetPageError(vmpage);
+ if (ioret == -ENOSPC)
+ set_bit(AS_ENOSPC, &inode->i_mapping->flags);
+ else
+ set_bit(AS_EIO, &inode->i_mapping->flags);
+
+ if ((ioret == -ESHUTDOWN || ioret == -EINTR ||
+ ioret == -EIO) && obj->vob_discard_page_warned == 0) {
+ obj->vob_discard_page_warned = 1;
+ ll_dirty_page_discard_warn(vmpage, ioret);
+ }
+ }
}
static void vvp_page_completion_read(const struct lu_env *env,
- const struct cl_page_slice *slice,
- int ioret)
-{
- struct ccc_page *cp = cl2ccc_page(slice);
- struct cl_page *page = cl_page_top(slice->cpl_page);
- struct inode *inode = ccc_object_inode(page->cp_obj);
- ENTRY;
-
- CL_PAGE_HEADER(D_PAGE, env, page, "completing READ with %d\n", ioret);
-
- if (cp->cpg_defer_uptodate)
- ll_ra_count_put(ll_i2sbi(inode), 1);
-
- if (ioret == 0) {
- /* XXX: do we need this for transient pages? */
- if (!cp->cpg_defer_uptodate)
- cl_page_export(env, page);
- } else
- cp->cpg_defer_uptodate = 0;
- vvp_page_completion_common(env, cp, ioret);
-
- EXIT;
-}
-
-static void vvp_page_completion_write_common(const struct lu_env *env,
- const struct cl_page_slice *slice,
- int ioret)
+ const struct cl_page_slice *slice,
+ int ioret)
{
- struct ccc_page *cp = cl2ccc_page(slice);
-
- if (ioret == 0) {
- cp->cpg_write_queued = 0;
- /*
- * Only ioret == 0, write succeed, then this page could be
- * deleted from the pending_writing count.
- */
- vvp_write_complete(cl2ccc(slice->cpl_obj), cp);
- }
- vvp_page_completion_common(env, cp, ioret);
+ struct vvp_page *vpg = cl2vvp_page(slice);
+ struct page *vmpage = vpg->vpg_page;
+ struct cl_page *page = slice->cpl_page;
+ struct inode *inode = vvp_object_inode(page->cp_obj);
+ ENTRY;
+
+ LASSERT(PageLocked(vmpage));
+ CL_PAGE_HEADER(D_PAGE, env, page, "completing READ with %d\n", ioret);
+
+ if (vpg->vpg_defer_uptodate)
+ ll_ra_count_put(ll_i2sbi(inode), 1);
+
+ if (ioret == 0) {
+ if (!vpg->vpg_defer_uptodate)
+ cl_page_export(env, page, 1);
+ } else if (vpg->vpg_defer_uptodate) {
+ vpg->vpg_defer_uptodate = 0;
+ if (ioret == -EWOULDBLOCK) {
+ /* mirror read failed, it needs to destroy the page
+ * because subpage would be from wrong osc when trying
+ * to read from a new mirror */
+ generic_error_remove_page(vmpage->mapping, vmpage);
+ }
+ }
+
+ if (page->cp_sync_io == NULL)
+ unlock_page(vmpage);
+
+ EXIT;
}
static void vvp_page_completion_write(const struct lu_env *env,
- const struct cl_page_slice *slice,
- int ioret)
+ 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;
-
- LINVRNT(cl_page_is_vmlocked(env, pg));
- LASSERT(PageWriteback(vmpage));
-
- CL_PAGE_HEADER(D_PAGE, env, pg, "completing WRITE with %d\n", ioret);
-
- end_page_writeback(vmpage);
- LASSERT(!PageWriteback(vmpage));
-
- vvp_page_completion_write_common(env, slice, ioret);
- EXIT;
+ struct vvp_page *vpg = cl2vvp_page(slice);
+ struct cl_page *pg = slice->cpl_page;
+ struct page *vmpage = vpg->vpg_page;
+ ENTRY;
+
+ CL_PAGE_HEADER(D_PAGE, env, pg, "completing WRITE with %d\n", ioret);
+
+ if (pg->cp_sync_io != NULL) {
+ LASSERT(PageLocked(vmpage));
+ LASSERT(!PageWriteback(vmpage));
+ } else {
+ LASSERT(PageWriteback(vmpage));
+ /*
+ * Only mark the page error only when it's an async write
+ * because applications won't wait for IO to finish.
+ */
+ vvp_vmpage_error(vvp_object_inode(pg->cp_obj), vmpage, ioret);
+
+ end_page_writeback(vmpage);
+ }
+ EXIT;
}
/**
* truncated. Skip it.
*/
static int vvp_page_make_ready(const struct lu_env *env,
- const struct cl_page_slice *slice)
+ const struct cl_page_slice *slice)
{
- cfs_page_t *vmpage = cl2vm_page(slice);
- struct cl_page *pg = slice->cpl_page;
- int result;
-
- result = -EAGAIN;
- /* we're trying to write, but the page is locked.. come back later */
- if (!TestSetPageLocked(vmpage)) {
- if (pg->cp_state == CPS_CACHED) {
- /*
- * We can cancel IO if page wasn't dirty after all.
- */
- clear_page_dirty_for_io(vmpage);
- /*
- * This actually clears the dirty bit in the radix
- * tree.
- */
- set_page_writeback(vmpage);
-
- CL_PAGE_HEADER(D_PAGE, env, pg, "readied\n");
- result = 0;
- } else
- /*
- * Page was concurrently truncated.
- */
- LASSERT(pg->cp_state == CPS_FREEING);
- }
- RETURN(result);
+ struct page *vmpage = cl2vm_page(slice);
+ struct cl_page *pg = slice->cpl_page;
+ int result = 0;
+
+ lock_page(vmpage);
+ if (clear_page_dirty_for_io(vmpage)) {
+ LASSERT(pg->cp_state == CPS_CACHED);
+ /* This actually clears the dirty bit in the radix
+ * tree. */
+ set_page_writeback(vmpage);
+ CL_PAGE_HEADER(D_PAGE, env, pg, "readied\n");
+ } else if (pg->cp_state == CPS_PAGEOUT) {
+ /* is it possible for osc_flush_async_page() to already
+ * make it ready? */
+ result = -EALREADY;
+ } else {
+ CL_PAGE_DEBUG(D_ERROR, env, pg, "Unexpecting page state %d.\n",
+ pg->cp_state);
+ LBUG();
+ }
+ unlock_page(vmpage);
+ RETURN(result);
}
static int vvp_page_print(const struct lu_env *env,
- const struct cl_page_slice *slice,
- void *cookie, lu_printer_t printer)
+ 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;
-
- (*printer)(env, cookie, LUSTRE_VVP_NAME"-page@%p(%d:%d:%d) "
- "vm@%p ",
- vp, vp->cpg_defer_uptodate, vp->cpg_ra_used,
- vp->cpg_write_queued, vmpage);
- if (vmpage != NULL) {
- (*printer)(env, cookie, "%lx %d:%d %lx %lu %slru",
- (long)vmpage->flags, page_count(vmpage),
- page_mapcount(vmpage), vmpage->private,
- page_index(vmpage),
- list_empty(&vmpage->lru) ? "not-" : "");
- }
- (*printer)(env, cookie, "\n");
- return 0;
-}
+ struct vvp_page *vpg = cl2vvp_page(slice);
+ struct page *vmpage = vpg->vpg_page;
-static const struct cl_page_operations vvp_page_ops = {
- .cpo_own = vvp_page_own,
- .cpo_assume = vvp_page_assume,
- .cpo_unassume = vvp_page_unassume,
- .cpo_disown = vvp_page_disown,
- .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,
- .cpo_print = vvp_page_print,
- .cpo_is_under_lock = ccc_page_is_under_lock,
- .io = {
- [CRT_READ] = {
- .cpo_prep = vvp_page_prep_read,
- .cpo_completion = vvp_page_completion_read,
- .cpo_make_ready = ccc_fail,
- },
- [CRT_WRITE] = {
- .cpo_prep = vvp_page_prep_write,
- .cpo_completion = vvp_page_completion_write,
- .cpo_make_ready = vvp_page_make_ready,
- }
- }
-};
+ (*printer)(env, cookie, LUSTRE_VVP_NAME"-page@%p(%d:%d) "
+ "vm@%p ",
+ vpg, vpg->vpg_defer_uptodate, vpg->vpg_ra_used, vmpage);
-static void vvp_transient_page_verify(const struct cl_page *page)
-{
- struct inode *inode = ccc_object_inode(page->cp_obj);
+ if (vmpage != NULL) {
+ (*printer)(env, cookie, "%lx %d:%d %lx %lu %slru",
+ (long)vmpage->flags, page_count(vmpage),
+ page_mapcount(vmpage), vmpage->private,
+ page_index(vmpage),
+ list_empty(&vmpage->lru) ? "not-" : "");
+ }
- LASSERT(!TRYLOCK_INODE_MUTEX(inode));
- /* LASSERT_SEM_LOCKED(&inode->i_alloc_sem); */
-}
+ (*printer)(env, cookie, "\n");
-static void vvp_transient_page_own(const struct lu_env *env,
- const struct cl_page_slice *slice,
- struct cl_io *_)
-{
- vvp_transient_page_verify(slice->cpl_page);
+ return 0;
}
-static void vvp_transient_page_assume(const struct lu_env *env,
- const struct cl_page_slice *slice,
- struct cl_io *_)
+static int vvp_page_fail(const struct lu_env *env,
+ const struct cl_page_slice *slice)
{
- vvp_transient_page_verify(slice->cpl_page);
-}
+ /*
+ * Cached read?
+ */
+ LBUG();
-static void vvp_transient_page_unassume(const struct lu_env *env,
- const struct cl_page_slice *slice,
- struct cl_io *_)
-{
- vvp_transient_page_verify(slice->cpl_page);
+ return 0;
}
-static void vvp_transient_page_disown(const struct lu_env *env,
- const struct cl_page_slice *slice,
- struct cl_io *_)
-{
- vvp_transient_page_verify(slice->cpl_page);
-}
+static const struct cl_page_operations vvp_page_ops = {
+ .cpo_own = vvp_page_own,
+ .cpo_assume = vvp_page_assume,
+ .cpo_unassume = vvp_page_unassume,
+ .cpo_disown = vvp_page_disown,
+ .cpo_discard = vvp_page_discard,
+ .cpo_delete = vvp_page_delete,
+ .cpo_export = vvp_page_export,
+ .cpo_is_vmlocked = vvp_page_is_vmlocked,
+ .cpo_fini = vvp_page_fini,
+ .cpo_print = vvp_page_print,
+ .io = {
+ [CRT_READ] = {
+ .cpo_prep = vvp_page_prep_read,
+ .cpo_completion = vvp_page_completion_read,
+ .cpo_make_ready = vvp_page_fail,
+ },
+ [CRT_WRITE] = {
+ .cpo_prep = vvp_page_prep_write,
+ .cpo_completion = vvp_page_completion_write,
+ .cpo_make_ready = vvp_page_make_ready,
+ },
+ },
+};
static void vvp_transient_page_discard(const struct lu_env *env,
const struct cl_page_slice *slice,
- struct cl_io *_)
+ struct cl_io *unused)
{
struct cl_page *page = slice->cpl_page;
- vvp_transient_page_verify(slice->cpl_page);
-
/*
* For transient pages, remove it from the radix tree.
*/
}
static int vvp_transient_page_is_vmlocked(const struct lu_env *env,
- const struct cl_page_slice *slice)
-{
- struct inode *inode = ccc_object_inode(slice->cpl_obj);
- int locked;
-
- locked = !TRYLOCK_INODE_MUTEX(inode);
- if (!locked)
- UNLOCK_INODE_MUTEX(inode);
- return locked ? -EBUSY : -ENODATA;
-}
-
-static void
-vvp_transient_page_completion_write(const struct lu_env *env,
- const struct cl_page_slice *slice,
- int ioret)
+ const struct cl_page_slice *slice)
{
- vvp_transient_page_verify(slice->cpl_page);
- vvp_page_completion_write_common(env, slice, ioret);
+ return -EBUSY;
}
-
static void vvp_transient_page_fini(const struct lu_env *env,
- struct cl_page_slice *slice)
+ struct cl_page_slice *slice,
+ struct pagevec *pvec)
{
- struct ccc_page *cp = cl2ccc_page(slice);
- struct cl_page *clp = slice->cpl_page;
- struct ccc_object *clobj = cl2ccc(clp->cp_obj);
+ struct vvp_page *vpg = cl2vvp_page(slice);
+ struct vvp_object *clobj = cl2vvp(slice->cpl_obj);
- vvp_page_fini_common(cp);
- LASSERT(!TRYLOCK_INODE_MUTEX(clobj->cob_inode));
- clobj->cob_transient_pages--;
+ vvp_page_fini_common(vpg, pvec);
+ atomic_dec(&clobj->vob_transient_pages);
}
static const struct cl_page_operations vvp_transient_page_ops = {
- .cpo_own = vvp_transient_page_own,
- .cpo_assume = vvp_transient_page_assume,
- .cpo_unassume = vvp_transient_page_unassume,
- .cpo_disown = vvp_transient_page_disown,
- .cpo_discard = vvp_transient_page_discard,
- .cpo_vmpage = ccc_page_vmpage,
- .cpo_fini = vvp_transient_page_fini,
- .cpo_is_vmlocked = vvp_transient_page_is_vmlocked,
- .cpo_print = vvp_page_print,
- .cpo_is_under_lock = ccc_page_is_under_lock,
- .io = {
- [CRT_READ] = {
- .cpo_prep = ccc_transient_page_prep,
- .cpo_completion = vvp_page_completion_read,
- },
- [CRT_WRITE] = {
- .cpo_prep = ccc_transient_page_prep,
- .cpo_completion = vvp_transient_page_completion_write,
- }
- }
+ .cpo_discard = vvp_transient_page_discard,
+ .cpo_fini = vvp_transient_page_fini,
+ .cpo_is_vmlocked = vvp_transient_page_is_vmlocked,
+ .cpo_print = vvp_page_print,
};
-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, pgoff_t index)
{
- struct ccc_page *cpg;
- int result;
-
- CLOBINVRNT(env, obj, ccc_object_invariant(obj));
-
- OBD_SLAB_ALLOC_PTR(cpg, vvp_page_kmem);
- 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(!TRYLOCK_INODE_MUTEX(clobj->cob_inode));
- 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);
+ struct vvp_page *vpg = cl_object_page_slice(obj, page);
+ struct page *vmpage = page->cp_vmpage;
+
+ CLOBINVRNT(env, obj, vvp_object_invariant(obj));
+
+ vpg->vpg_page = vmpage;
+ get_page(vmpage);
+
+ 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, &vpg->vpg_cl, obj, index,
+ &vvp_page_ops);
+ } else {
+ struct vvp_object *clobj = cl2vvp(obj);
+
+ cl_page_slice_add(page, &vpg->vpg_cl, obj, index,
+ &vvp_transient_page_ops);
+ atomic_inc(&clobj->vob_transient_pages);
+ }
+ return 0;
}
-
git://git.whamcloud.com / fs / lustre-release.git / blobdiff