-/* -*- 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) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
- * Copyright (c) 2011 Whamcloud, Inc.
- *
+ * Copyright (c) 2011, 2012, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* Lustre Lite I/O page cache routines for the 2.5/2.6 kernel version
*/
-#ifndef AUTOCONF_INCLUDED
-#include <linux/config.h>
-#endif
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/string.h>
#include <linux/stat.h>
#include <linux/errno.h>
-#include <linux/smp_lock.h>
#include <linux/unistd.h>
-#include <linux/version.h>
-#include <asm/system.h>
#include <asm/uaccess.h>
+#ifdef HAVE_MIGRATE_H
+#include <linux/migrate.h>
+#elif defined(HAVE_MIGRATE_MODE_H)
+#include <linux/migrate_mode.h>
+#endif
#include <linux/fs.h>
#include <linux/buffer_head.h>
+#include <linux/mpage.h>
#include <linux/writeback.h>
#include <linux/stat.h>
#include <asm/uaccess.h>
#include <linux/mm.h>
#include <linux/pagemap.h>
-#include <linux/smp_lock.h>
#define DEBUG_SUBSYSTEM S_LLITE
* aligned truncate). Lustre leaves partially truncated page in the cache,
* relying on struct inode::i_size to limit further accesses.
*/
-static int cl_invalidatepage(struct page *vmpage, unsigned long offset)
+static void ll_invalidatepage(struct page *vmpage, unsigned long offset)
{
struct inode *inode;
struct lu_env *env;
struct cl_page *page;
struct cl_object *obj;
- int result;
int refcheck;
LASSERT(PageLocked(vmpage));
* below because they are run with page locked and all our io is
* happening with locked page too
*/
- result = 0;
if (offset == 0) {
env = cl_env_get(&refcheck);
if (!IS_ERR(env)) {
lu_ref_add(&page->cp_reference,
"delete", vmpage);
cl_page_delete(env, page);
- result = 1;
lu_ref_del(&page->cp_reference,
"delete", vmpage);
cl_page_put(env, page);
cl_env_put(env, &refcheck);
}
}
- return result;
}
-#ifdef HAVE_INVALIDATEPAGE_RETURN_INT
-static int ll_invalidatepage(struct page *page, unsigned long offset)
-{
- return cl_invalidatepage(page, offset);
-}
-#else /* !HAVE_INVALIDATEPAGE_RETURN_INT */
-static void ll_invalidatepage(struct page *page, unsigned long offset)
-{
- cl_invalidatepage(page, offset);
-}
-#endif
-
#ifdef HAVE_RELEASEPAGE_WITH_INT
#define RELEASEPAGE_ARG_TYPE int
#else
#define RELEASEPAGE_ARG_TYPE gfp_t
#endif
-static int ll_releasepage(struct page *page, RELEASEPAGE_ARG_TYPE gfp_mask)
+static int ll_releasepage(struct page *vmpage, RELEASEPAGE_ARG_TYPE gfp_mask)
{
- void *cookie;
+ struct cl_env_nest nest;
+ struct lu_env *env;
+ struct cl_object *obj;
+ struct cl_page *page;
+ struct address_space *mapping;
+ int result;
- cookie = cl_env_reenter();
- ll_invalidatepage(page, 0);
- cl_env_reexit(cookie);
- return 1;
+ LASSERT(PageLocked(vmpage));
+ if (PageWriteback(vmpage) || PageDirty(vmpage))
+ return 0;
+
+ mapping = vmpage->mapping;
+ if (mapping == NULL)
+ return 1;
+
+ obj = ll_i2info(mapping->host)->lli_clob;
+ if (obj == NULL)
+ return 1;
+
+ /* 1 for page allocator, 1 for cl_page and 1 for page cache */
+ if (page_count(vmpage) > 3)
+ return 0;
+
+ /* TODO: determine what gfp should be used by @gfp_mask. */
+ env = cl_env_nested_get(&nest);
+ if (IS_ERR(env))
+ /* If we can't allocate an env we won't call cl_page_put()
+ * later on which further means it's impossible to drop
+ * page refcount by cl_page, so ask kernel to not free
+ * this page. */
+ return 0;
+
+ page = cl_vmpage_page(vmpage, obj);
+ result = page == NULL;
+ if (page != NULL) {
+ if (!cl_page_in_use(page)) {
+ result = 1;
+ cl_page_delete(env, page);
+ }
+ cl_page_put(env, page);
+ }
+ cl_env_nested_put(&nest, env);
+ return result;
}
static int ll_set_page_dirty(struct page *vmpage)
src_page = (rw == WRITE) ? pages[i] : vmpage;
dst_page = (rw == WRITE) ? vmpage : pages[i];
- src = kmap_atomic(src_page, KM_USER0);
- dst = kmap_atomic(dst_page, KM_USER1);
+ src = ll_kmap_atomic(src_page, KM_USER0);
+ dst = ll_kmap_atomic(dst_page, KM_USER1);
memcpy(dst, src, min(page_size, size));
- kunmap_atomic(dst, KM_USER1);
- kunmap_atomic(src, KM_USER0);
+ ll_kunmap_atomic(dst, KM_USER1);
+ ll_kunmap_atomic(src, KM_USER0);
/* make sure page will be added to the transfer by
* cl_io_submit()->...->vvp_page_prep_write(). */
if (rc == 0 && io_pages) {
rc = cl_io_submit_sync(env, io,
rw == READ ? CRT_READ : CRT_WRITE,
- queue, CRP_NORMAL, 0);
+ queue, 0);
}
if (rc == 0)
rc = pv->ldp_size;
return ll_direct_rw_pages(env, io, rw, inode, &pvec);
}
-/* This is the maximum size of a single O_DIRECT request, based on a 128kB
+#ifdef KMALLOC_MAX_SIZE
+#define MAX_MALLOC KMALLOC_MAX_SIZE
+#else
+#define MAX_MALLOC (128 * 1024)
+#endif
+
+/* This is the maximum size of a single O_DIRECT request, based on the
* kmalloc limit. We need to fit all of the brw_page structs, each one
* representing PAGE_SIZE worth of user data, into a single buffer, and
- * then truncate this to be a full-sized RPC. This is 22MB for 4kB pages. */
-#define MAX_DIO_SIZE ((128 * 1024 / sizeof(struct brw_page) * CFS_PAGE_SIZE) & \
- ~(PTLRPC_MAX_BRW_SIZE - 1))
+ * then truncate this to be a full-sized RPC. For 4kB PAGE_SIZE this is
+ * up to 22MB for 128kB kmalloc and up to 682MB for 4MB kmalloc. */
+#define MAX_DIO_SIZE ((MAX_MALLOC / sizeof(struct brw_page) * CFS_PAGE_SIZE) & \
+ ~(DT_MAX_BRW_SIZE - 1))
static ssize_t ll_direct_IO_26(int rw, struct kiocb *iocb,
const struct iovec *iov, loff_t file_offset,
unsigned long nr_segs)
long count = iov_length(iov, nr_segs);
long tot_bytes = 0, result = 0;
struct ll_inode_info *lli = ll_i2info(inode);
- struct lov_stripe_md *lsm = lli->lli_smd;
unsigned long seg = 0;
long size = MAX_DIO_SIZE;
int refcheck;
ENTRY;
- if (!lli->lli_smd || !lli->lli_smd->lsm_object_id)
+ if (!lli->lli_has_smd)
RETURN(-EBADF);
/* FIXME: io smaller than PAGE_SIZE is broken on ia64 ??? */
io = ccc_env_io(env)->cui_cl.cis_io;
LASSERT(io != NULL);
- /* 0. Need locking between buffered and direct access. and race with
- *size changing by concurrent truncates and writes.
- * 1. Need inode sem to operate transient pages. */
- if (rw == READ)
- LOCK_INODE_MUTEX(inode);
+ /* 0. Need locking between buffered and direct access. and race with
+ * size changing by concurrent truncates and writes.
+ * 1. Need inode mutex to operate transient pages.
+ */
+ if (rw == READ)
+ mutex_lock(&inode->i_mutex);
LASSERT(obj->cob_transient_pages == 0);
for (seg = 0; seg < nr_segs; seg++) {
unsigned long user_addr = (unsigned long)iov[seg].iov_base;
if (rw == READ) {
- if (file_offset >= inode->i_size)
+ if (file_offset >= i_size_read(inode))
break;
- if (file_offset + iov_left > inode->i_size)
- iov_left = inode->i_size - file_offset;
+ if (file_offset + iov_left > i_size_read(inode))
+ iov_left = i_size_read(inode) - file_offset;
}
while (iov_left > 0) {
int page_count, max_pages = 0;
long bytes;
- bytes = min(size,iov_left);
+ bytes = min(size, iov_left);
page_count = ll_get_user_pages(rw, user_addr, bytes,
&pages, &max_pages);
if (likely(page_count > 0)) {
bytes = page_count << CFS_PAGE_SHIFT;
result = ll_direct_IO_26_seg(env, io, rw, inode,
file->f_mapping,
- bytes,
- file_offset, pages,
- page_count);
+ bytes, file_offset,
+ pages, page_count);
ll_free_user_pages(pages, max_pages, rw==READ);
} else if (page_count == 0) {
GOTO(out, result = -EFAULT);
}
}
out:
- LASSERT(obj->cob_transient_pages == 0);
- if (rw == READ)
- UNLOCK_INODE_MUTEX(inode);
+ LASSERT(obj->cob_transient_pages == 0);
+ if (rw == READ)
+ mutex_unlock(&inode->i_mutex);
if (tot_bytes > 0) {
if (rw == WRITE) {
- lov_stripe_lock(lsm);
- obd_adjust_kms(ll_i2dtexp(inode), lsm, file_offset, 0);
- lov_stripe_unlock(lsm);
- }
- }
-
- cl_env_put(env, &refcheck);
- RETURN(tot_bytes ? : result);
+ struct lov_stripe_md *lsm;
+
+ lsm = ccc_inode_lsm_get(inode);
+ LASSERT(lsm != NULL);
+ lov_stripe_lock(lsm);
+ obd_adjust_kms(ll_i2dtexp(inode), lsm, file_offset, 0);
+ lov_stripe_unlock(lsm);
+ ccc_inode_lsm_put(inode, lsm);
+ }
+ }
+
+ cl_env_put(env, &refcheck);
+ RETURN(tot_bytes ? : result);
}
#if defined(HAVE_KERNEL_WRITE_BEGIN_END) || defined(MS_HAS_NEW_AOPS)
#ifdef CONFIG_MIGRATION
int ll_migratepage(struct address_space *mapping,
- struct page *newpage, struct page *page)
+ struct page *newpage, struct page *page
+#ifdef HAVE_MIGRATEPAGE_4ARGS
+ , enum migrate_mode mode
+#endif
+ )
{
/* Always fail page migration until we have a proper implementation */
return -EIO;
// .readpages = ll_readpages,
.direct_IO = ll_direct_IO_26,
.writepage = ll_writepage,
- .writepages = generic_writepages,
+ .writepages = ll_writepages,
.set_page_dirty = ll_set_page_dirty,
- .sync_page = NULL,
#ifdef HAVE_KERNEL_WRITE_BEGIN_END
.write_begin = ll_write_begin,
.write_end = ll_write_end,
// .orig_aops.readpages = ll_readpages,
.orig_aops.direct_IO = ll_direct_IO_26,
.orig_aops.writepage = ll_writepage,
- .orig_aops.writepages = generic_writepages,
+ .orig_aops.writepages = ll_writepages,
.orig_aops.set_page_dirty = ll_set_page_dirty,
- .orig_aops.sync_page = NULL,
.orig_aops.prepare_write = ll_prepare_write,
.orig_aops.commit_write = ll_commit_write,
.orig_aops.invalidatepage = ll_invalidatepage,
git://git.whamcloud.com / fs / lustre-release.git / blobdiff