/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=8:tabstop=8:
*
- * Lustre Lite I/O page cache routines for the 2.5/2.6 kernel version
+ * GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
*
- * Copyright (c) 2001-2003 Cluster File Systems, Inc.
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
*
- * This file is part of Lustre, http://www.lustre.org.
+ * 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
*
- * Lustre is free software; you can redistribute it and/or
- * modify it under the terms of version 2 of the GNU General Public
- * License as published by the Free Software Foundation.
+ * 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.
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
*
- * Lustre is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
+ * lustre/lustre/llite/rw26.c
*
- * You should have received a copy of the GNU General Public License
- * along with Lustre; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * Lustre Lite I/O page cache routines for the 2.5/2.6 kernel version
*/
-#ifdef HAVE_KERNEL_CONFIG_H
+
+#ifndef AUTOCONF_INCLUDED
#include <linux/config.h>
#endif
#include <linux/kernel.h>
#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 <asm/segment.h>
#include <linux/mm.h>
#include <linux/pagemap.h>
#include <linux/smp_lock.h>
#define DEBUG_SUBSYSTEM S_LLITE
+//#include <lustre_mdc.h>
#include <lustre_lite.h>
#include "llite_internal.h"
#include <linux/lustre_compat25.h>
-static int ll_writepage_26(struct page *page, struct writeback_control *wbc)
+/**
+ * Implements Linux VM address_space::invalidatepage() method. This method is
+ * called when the page is truncate from a file, either as a result of
+ * explicit truncate, or when inode is removed from memory (as a result of
+ * final iput(), umount, or memory pressure induced icache shrinking).
+ *
+ * [0, offset] bytes of the page remain valid (this is for a case of not-page
+ * 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)
{
- return ll_writepage(page);
+ struct inode *inode;
+ struct lu_env *env;
+ struct cl_page *page;
+ struct cl_object *obj;
+
+ int result;
+ int refcheck;
+
+ LASSERT(PageLocked(vmpage));
+ LASSERT(!PageWriteback(vmpage));
+
+ /*
+ * It is safe to not check anything in invalidatepage/releasepage
+ * 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)) {
+ inode = vmpage->mapping->host;
+ obj = ll_i2info(inode)->lli_clob;
+ if (obj != NULL) {
+ page = cl_vmpage_page(vmpage, obj);
+ if (page != NULL) {
+ 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);
+ }
+ } else
+ LASSERT(vmpage->private == 0);
+ cl_env_put(env, &refcheck);
+ }
+ }
+ return result;
}
-/* It is safe to not check anything in invalidatepage/releasepage below
- because they are run with page locked and all our io is happening with
- locked page too */
#ifdef HAVE_INVALIDATEPAGE_RETURN_INT
static int ll_invalidatepage(struct page *page, unsigned long offset)
{
- if (offset)
- return 0;
- if (PagePrivate(page))
- ll_removepage(page);
- return 1;
+ return cl_invalidatepage(page, offset);
}
-#else
+#else /* !HAVE_INVALIDATEPAGE_RETURN_INT */
static void ll_invalidatepage(struct page *page, unsigned long offset)
{
- if (offset)
- return;
- if (PagePrivate(page))
- ll_removepage(page);
+ cl_invalidatepage(page, offset);
}
#endif
-static int ll_releasepage(struct page *page, gfp_t gfp_mask)
+#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)
{
- if (PagePrivate(page))
- ll_removepage(page);
+ void *cookie;
+
+ cookie = cl_env_reenter();
+ ll_invalidatepage(page, 0);
+ cl_env_reexit(cookie);
return 1;
}
+static int ll_set_page_dirty(struct page *vmpage)
+{
+#if 0
+ struct cl_page *page = vvp_vmpage_page_transient(vmpage);
+ struct vvp_object *obj = cl_inode2vvp(vmpage->mapping->host);
+ struct vvp_page *cpg;
+
+ /*
+ * XXX should page method be called here?
+ */
+ LASSERT(&obj->co_cl == page->cp_obj);
+ cpg = cl2vvp_page(cl_page_at(page, &vvp_device_type));
+ /*
+ * XXX cannot do much here, because page is possibly not locked:
+ * sys_munmap()->...
+ * ->unmap_page_range()->zap_pte_range()->set_page_dirty().
+ */
+ vvp_write_pending(obj, cpg);
+#endif
+ RETURN(__set_page_dirty_nobuffers(vmpage));
+}
+
#define MAX_DIRECTIO_SIZE 2*1024*1024*1024UL
static inline int ll_get_user_pages(int rw, unsigned long user_addr,
- size_t size, struct page ***pages)
+ size_t size, struct page ***pages,
+ int *max_pages)
{
int result = -ENOMEM;
- unsigned long page_count;
/* set an arbitrary limit to prevent arithmetic overflow */
if (size > MAX_DIRECTIO_SIZE) {
return -EFBIG;
}
- page_count = (user_addr + size + CFS_PAGE_SIZE - 1) >> CFS_PAGE_SHIFT;
- page_count -= user_addr >> CFS_PAGE_SHIFT;
+ *max_pages = (user_addr + size + CFS_PAGE_SIZE - 1) >> CFS_PAGE_SHIFT;
+ *max_pages -= user_addr >> CFS_PAGE_SHIFT;
- OBD_ALLOC_GFP(*pages, page_count * sizeof(**pages), GFP_KERNEL);
+ OBD_ALLOC_LARGE(*pages, *max_pages * sizeof(**pages));
if (*pages) {
down_read(¤t->mm->mmap_sem);
result = get_user_pages(current, current->mm, user_addr,
- page_count, (rw == READ), 0, *pages,
+ *max_pages, (rw == READ), 0, *pages,
NULL);
up_read(¤t->mm->mmap_sem);
+ if (unlikely(result <= 0))
+ OBD_FREE_LARGE(*pages, *max_pages * sizeof(**pages));
}
return result;
int i;
for (i = 0; i < npages; i++) {
+ if (pages[i] == NULL)
+ break;
if (do_dirty)
set_page_dirty_lock(pages[i]);
page_cache_release(pages[i]);
}
- OBD_FREE(pages, npages * sizeof(*pages));
+ OBD_FREE_LARGE(pages, npages * sizeof(*pages));
}
-static ssize_t ll_direct_IO_26_seg(int rw, struct file *file,
- struct address_space *mapping,
- struct inode *inode,
- struct lov_stripe_md *lsm,
- unsigned long user_addr, size_t size,
- loff_t file_offset, struct page **pages,
- int page_count)
+ssize_t ll_direct_rw_pages(const struct lu_env *env, struct cl_io *io,
+ int rw, struct inode *inode,
+ struct ll_dio_pages *pv)
{
- struct brw_page *pga;
- struct obdo oa;
- int i, rc = 0;
- size_t length;
+ struct cl_page *clp;
+ struct cl_2queue *queue;
+ struct cl_object *obj = io->ci_obj;
+ int i;
+ ssize_t rc = 0;
+ loff_t file_offset = pv->ldp_start_offset;
+ long size = pv->ldp_size;
+ int page_count = pv->ldp_nr;
+ struct page **pages = pv->ldp_pages;
+ long page_size = cl_page_size(obj);
+ bool do_io;
+ int io_pages = 0;
ENTRY;
- OBD_ALLOC(pga, sizeof(*pga) * page_count);
- if (!pga)
- RETURN(-ENOMEM);
+ queue = &io->ci_queue;
+ cl_2queue_init(queue);
+ for (i = 0; i < page_count; i++) {
+ if (pv->ldp_offsets)
+ file_offset = pv->ldp_offsets[i];
+
+ LASSERT(!(file_offset & (page_size - 1)));
+ clp = cl_page_find(env, obj, cl_index(obj, file_offset),
+ pv->ldp_pages[i], CPT_TRANSIENT);
+ if (IS_ERR(clp)) {
+ rc = PTR_ERR(clp);
+ break;
+ }
- for (i = 0, length = size; length > 0;
- length -=pga[i].count, file_offset +=pga[i].count,i++) {/*i last!*/
- pga[i].pg = pages[i];
- pga[i].off = file_offset;
- /* To the end of the page, or the length, whatever is less */
- pga[i].count = min_t(int, CFS_PAGE_SIZE -(file_offset & ~CFS_PAGE_MASK),
- length);
- pga[i].flag = 0;
- if (rw == READ)
- POISON_PAGE(pages[i], 0x0d);
- }
+ rc = cl_page_own(env, io, clp);
+ if (rc) {
+ LASSERT(clp->cp_state == CPS_FREEING);
+ cl_page_put(env, clp);
+ break;
+ }
- ll_inode_fill_obdo(inode, rw, &oa);
-
- if (rw == WRITE)
- lprocfs_counter_add(ll_i2sbi(inode)->ll_stats,
- LPROC_LL_DIRECT_WRITE, size);
- else
- lprocfs_counter_add(ll_i2sbi(inode)->ll_stats,
- LPROC_LL_DIRECT_READ, size);
- rc = obd_brw_rqset(rw == WRITE ? OBD_BRW_WRITE : OBD_BRW_READ,
- ll_i2obdexp(inode), &oa, lsm, page_count, pga, NULL);
- if (rc == 0) {
- rc = size;
- if (rw == WRITE) {
- lov_stripe_lock(lsm);
- obd_adjust_kms(ll_i2obdexp(inode), lsm, file_offset, 0);
- lov_stripe_unlock(lsm);
+ do_io = true;
+
+ /* check the page type: if the page is a host page, then do
+ * write directly */
+ if (clp->cp_type == CPT_CACHEABLE) {
+ cfs_page_t *vmpage = cl_page_vmpage(env, clp);
+ cfs_page_t *src_page;
+ cfs_page_t *dst_page;
+ void *src;
+ void *dst;
+
+ 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);
+ memcpy(dst, src, min(page_size, size));
+ kunmap_atomic(dst, KM_USER1);
+ kunmap_atomic(src, KM_USER0);
+
+ /* make sure page will be added to the transfer by
+ * cl_io_submit()->...->vvp_page_prep_write(). */
+ if (rw == WRITE)
+ set_page_dirty(vmpage);
+
+ if (rw == READ) {
+ /* do not issue the page for read, since it
+ * may reread a ra page which has NOT uptodate
+ * bit set. */
+ cl_page_disown(env, io, clp);
+ do_io = false;
+ }
}
+
+ if (likely(do_io)) {
+ cl_2queue_add(queue, clp);
+
+ /*
+ * Set page clip to tell transfer formation engine
+ * that page has to be sent even if it is beyond KMS.
+ */
+ cl_page_clip(env, clp, 0, min(size, page_size));
+
+ ++io_pages;
+ }
+
+ /* drop the reference count for cl_page_find */
+ cl_page_put(env, clp);
+ size -= page_size;
+ file_offset += page_size;
}
- OBD_FREE(pga, sizeof(*pga) * page_count);
+ if (rc == 0 && io_pages) {
+ rc = cl_io_submit_sync(env, io,
+ rw == READ ? CRT_READ : CRT_WRITE,
+ queue, CRP_NORMAL, 0);
+ }
+ if (rc == 0)
+ rc = pv->ldp_size;
+
+ cl_2queue_discard(env, io, queue);
+ cl_2queue_disown(env, io, queue);
+ cl_2queue_fini(env, queue);
RETURN(rc);
}
+EXPORT_SYMBOL(ll_direct_rw_pages);
+static ssize_t ll_direct_IO_26_seg(const struct lu_env *env, struct cl_io *io,
+ int rw, struct inode *inode,
+ struct address_space *mapping,
+ size_t size, loff_t file_offset,
+ struct page **pages, int page_count)
+{
+ struct ll_dio_pages pvec = { .ldp_pages = pages,
+ .ldp_nr = page_count,
+ .ldp_size = size,
+ .ldp_offsets = NULL,
+ .ldp_start_offset = file_offset
+ };
+
+ 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
+ * 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))
static ssize_t ll_direct_IO_26(int rw, struct kiocb *iocb,
const struct iovec *iov, loff_t file_offset,
unsigned long nr_segs)
{
+ struct lu_env *env;
+ struct cl_io *io;
struct file *file = iocb->ki_filp;
- ssize_t count = iov_length(iov, nr_segs), tot_bytes = 0;
- struct ll_inode_info *lli = ll_i2info(file->f_mapping->host);
- unsigned long seg;
+ struct inode *inode = file->f_mapping->host;
+ struct ccc_object *obj = cl_inode2ccc(inode);
+ 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)
RETURN(-EBADF);
- /* FIXME: io smaller than CFS_PAGE_SIZE is broken on ia64 ??? */
- if ((file_offset & (~CFS_PAGE_MASK)) || (count & ~CFS_PAGE_MASK))
+ /* FIXME: io smaller than PAGE_SIZE is broken on ia64 ??? */
+ if ((file_offset & ~CFS_PAGE_MASK) || (count & ~CFS_PAGE_MASK))
RETURN(-EINVAL);
+ CDEBUG(D_VFSTRACE, "VFS Op:inode=%lu/%u(%p), size=%lu (max %lu), "
+ "offset=%lld=%llx, pages %lu (max %lu)\n",
+ inode->i_ino, inode->i_generation, inode, count, MAX_DIO_SIZE,
+ file_offset, file_offset, count >> CFS_PAGE_SHIFT,
+ MAX_DIO_SIZE >> CFS_PAGE_SHIFT);
+
/* Check that all user buffers are aligned as well */
for (seg = 0; seg < nr_segs; seg++) {
- unsigned long user_addr = (unsigned long)iov[seg].iov_base;
- size_t size = iov[seg].iov_len;
- if ((user_addr & ~CFS_PAGE_MASK) || (size & ~CFS_PAGE_MASK))
+ if (((unsigned long)iov[seg].iov_base & ~CFS_PAGE_MASK) ||
+ (iov[seg].iov_len & ~CFS_PAGE_MASK))
RETURN(-EINVAL);
}
- seg = 0;
- while ((seg < nr_segs) && (tot_bytes >= 0)) {
- const struct iovec *vec = &iov[seg++];
- unsigned long user_addr = (unsigned long)vec->iov_base;
- size_t size = vec->iov_len;
- struct page **pages;
- int page_count;
- ssize_t result;
-
- page_count = ll_get_user_pages(rw, user_addr, size, &pages);
- if (page_count < 0) {
- ll_free_user_pages(pages, 0, 0);
- if (tot_bytes > 0)
- break;
- return page_count;
- }
+ env = cl_env_get(&refcheck);
+ LASSERT(!IS_ERR(env));
+ 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);
- result = ll_direct_IO_26_seg(rw, file, file->f_mapping,
- file->f_mapping->host,
- lli->lli_smd, user_addr, size,
- file_offset, pages, page_count);
- ll_free_user_pages(pages, page_count, rw == READ);
+ LASSERT(obj->cob_transient_pages == 0);
+ for (seg = 0; seg < nr_segs; seg++) {
+ long iov_left = iov[seg].iov_len;
+ unsigned long user_addr = (unsigned long)iov[seg].iov_base;
- if (result <= 0) {
- if (tot_bytes > 0)
+ if (rw == READ) {
+ if (file_offset >= inode->i_size)
break;
- return result;
+ if (file_offset + iov_left > inode->i_size)
+ iov_left = inode->i_size - file_offset;
}
- tot_bytes += result;
- file_offset += result;
- if (result < size)
- break;
+ while (iov_left > 0) {
+ struct page **pages;
+ int page_count, max_pages = 0;
+ long bytes;
+
+ bytes = min(size,iov_left);
+ page_count = ll_get_user_pages(rw, user_addr, bytes,
+ &pages, &max_pages);
+ if (likely(page_count > 0)) {
+ if (unlikely(page_count < max_pages))
+ 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);
+ ll_free_user_pages(pages, max_pages, rw==READ);
+ } else if (page_count == 0) {
+ GOTO(out, result = -EFAULT);
+ } else {
+ result = page_count;
+ }
+ if (unlikely(result <= 0)) {
+ /* If we can't allocate a large enough buffer
+ * for the request, shrink it to a smaller
+ * PAGE_SIZE multiple and try again.
+ * We should always be able to kmalloc for a
+ * page worth of page pointers = 4MB on i386. */
+ if (result == -ENOMEM &&
+ size > (CFS_PAGE_SIZE / sizeof(*pages)) *
+ CFS_PAGE_SIZE) {
+ size = ((((size / 2) - 1) |
+ ~CFS_PAGE_MASK) + 1) &
+ CFS_PAGE_MASK;
+ CDEBUG(D_VFSTRACE,"DIO size now %lu\n",
+ size);
+ continue;
+ }
+
+ GOTO(out, result);
+ }
+
+ tot_bytes += result;
+ file_offset += result;
+ iov_left -= result;
+ user_addr += result;
+ }
}
- return tot_bytes;
-}
+out:
+ LASSERT(obj->cob_transient_pages == 0);
+ if (rw == READ)
+ UNLOCK_INODE_MUTEX(inode);
-struct address_space_operations ll_aops = {
- .readpage = ll_readpage,
-// .readpages = ll_readpages,
- .direct_IO = ll_direct_IO_26,
- .writepage = ll_writepage_26,
- .writepages = generic_writepages,
- .set_page_dirty = __set_page_dirty_nobuffers,
- .sync_page = NULL,
- .prepare_write = ll_prepare_write,
- .commit_write = ll_commit_write,
- .invalidatepage = ll_invalidatepage,
- .releasepage = ll_releasepage,
- .bmap = NULL
-};
+ 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);
+ }
+ }
-static int wait_on_page_locked_range(struct address_space *mapping,
- pgoff_t start, pgoff_t end)
+ cl_env_put(env, &refcheck);
+ RETURN(tot_bytes ? : result);
+}
+
+#ifdef HAVE_KERNEL_WRITE_BEGIN_END
+static int ll_write_begin(struct file *file, struct address_space *mapping,
+ loff_t pos, unsigned len, unsigned flags,
+ struct page **pagep, void **fsdata)
{
- pgoff_t index;
+ pgoff_t index = pos >> PAGE_CACHE_SHIFT;
struct page *page;
- int ret = 0;
+ int rc;
+ unsigned from = pos & (PAGE_CACHE_SIZE - 1);
+ ENTRY;
- if (end < start)
- return 0;
+ page = grab_cache_page_write_begin(mapping, index, flags);
+ if (!page)
+ RETURN(-ENOMEM);
- for(index = start; index < end; index++) {
- page = find_get_page(mapping, index);
- if (page == NULL)
- continue;
+ *pagep = page;
- wait_on_page_locked(page);
- if (PageError(page))
- ret = -EIO;
- cond_resched();
+ rc = ll_prepare_write(file, page, from, from + len);
+ if (rc) {
+ unlock_page(page);
+ page_cache_release(page);
}
+ RETURN(rc);
+}
- /* Check for outstanding write errors */
- if (test_and_clear_bit(AS_ENOSPC, &mapping->flags))
- ret = -ENOSPC;
- if (test_and_clear_bit(AS_EIO, &mapping->flags))
- ret = -EIO;
+static int ll_write_end(struct file *file, struct address_space *mapping,
+ loff_t pos, unsigned len, unsigned copied,
+ struct page *page, void *fsdata)
+{
+ unsigned from = pos & (PAGE_CACHE_SIZE - 1);
+ int rc;
+ rc = ll_commit_write(file, page, from, from + copied);
- return ret;
+ unlock_page(page);
+ page_cache_release(page);
+ return rc?rc:copied;
}
+#endif
-int ll_sync_page_range(struct inode *inode, struct address_space *mapping,
- loff_t pos, size_t count)
+#ifdef CONFIG_MIGRATION
+int ll_migratepage(struct address_space *mapping,
+ struct page *newpage, struct page *page)
{
- pgoff_t start = pos >> CFS_PAGE_SHIFT;
- pgoff_t end = (pos + count - 1) >> CFS_PAGE_SHIFT;
- struct writeback_control wbc;
- int ret;
-
- wbc.sync_mode = WB_SYNC_ALL;
- wbc.nr_to_write = mapping->nrpages * 2;
- wbc.start = start;
- wbc.end = end;
- ret = generic_writepages(mapping, &wbc);
-
- if (ret == 0)
- ret = wait_on_page_locked_range(mapping, start, end);
- return ret;
+ /* Always fail page migration until we have a proper implementation */
+ return -EIO;
}
+#endif
+struct address_space_operations ll_aops = {
+ .readpage = ll_readpage,
+// .readpages = ll_readpages,
+ .direct_IO = ll_direct_IO_26,
+ .writepage = ll_writepage,
+ .writepages = generic_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,
+#else
+ .prepare_write = ll_prepare_write,
+ .commit_write = ll_commit_write,
+#endif
+ .invalidatepage = ll_invalidatepage,
+ .releasepage = (void *)ll_releasepage,
+#ifdef CONFIG_MIGRATION
+ .migratepage = ll_migratepage,
+#endif
+ .bmap = NULL
+};
git://git.whamcloud.com / fs / lustre-release.git / blobdiff