/*
* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
- * Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
+ * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
#include <linux/swap.h>
#include <linux/gfs2_ondisk.h>
#include <linux/lm_interface.h>
-#include <linux/swap.h>
-#include <linux/pagevec.h>
+#include <linux/backing-dev.h>
#include "gfs2.h"
#include "incore.h"
}
}
-/**
- * gfs2_get_block - Fills in a buffer head with details about a block
- * @inode: The inode
- * @lblock: The block number to look up
- * @bh_result: The buffer head to return the result in
- * @create: Non-zero if we may add block to the file
- *
- * Returns: errno
- */
-
-int gfs2_get_block(struct inode *inode, sector_t lblock,
- struct buffer_head *bh_result, int create)
-{
- return gfs2_block_map(inode, lblock, create, bh_result);
-}
-
/**
* gfs2_get_block_noalloc - Fills in a buffer head with details about a block
* @inode: The inode
{
int error;
- error = gfs2_block_map(inode, lblock, 0, bh_result);
+ error = gfs2_block_map(inode, lblock, bh_result, 0);
if (error)
return error;
if (!buffer_mapped(bh_result))
static int gfs2_get_block_direct(struct inode *inode, sector_t lblock,
struct buffer_head *bh_result, int create)
{
- return gfs2_block_map(inode, lblock, 0, bh_result);
+ return gfs2_block_map(inode, lblock, bh_result, 0);
}
/**
loff_t i_size = i_size_read(inode);
pgoff_t end_index = i_size >> PAGE_CACHE_SHIFT;
unsigned offset;
- int ret = -EIO;
if (gfs2_assert_withdraw(sdp, gfs2_glock_is_held_excl(ip->i_gl)))
goto out;
- ret = 0;
if (current->journal_info)
goto redirty;
/* Is the page fully outside i_size? (truncate in progress) */
int i;
int ret;
- ret = gfs2_trans_begin(sdp, nrblocks, 0);
+ ret = gfs2_trans_begin(sdp, nrblocks, nrblocks);
if (ret < 0)
return ret;
* so we need to supply one here. It doesn't happen often.
*/
if (unlikely(page->index)) {
- zero_user_page(page, 0, PAGE_CACHE_SIZE, KM_USER0);
+ zero_user(page, 0, PAGE_CACHE_SIZE);
return 0;
}
error = stuffed_readpage(ip, page);
unlock_page(page);
} else {
- error = mpage_readpage(page, gfs2_get_block);
+ error = mpage_readpage(page, gfs2_block_map);
}
if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
static int gfs2_readpage(struct file *file, struct page *page)
{
struct gfs2_inode *ip = GFS2_I(page->mapping->host);
- struct gfs2_holder gh;
+ struct gfs2_holder *gh;
int error;
- gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME|LM_FLAG_TRY_1CB, &gh);
- error = gfs2_glock_nq_atime(&gh);
- if (unlikely(error)) {
+ gh = gfs2_glock_is_locked_by_me(ip->i_gl);
+ if (!gh) {
+ gh = kmalloc(sizeof(struct gfs2_holder), GFP_NOFS);
+ if (!gh)
+ return -ENOBUFS;
+ gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME, gh);
unlock_page(page);
- goto out;
+ error = gfs2_glock_nq_atime(gh);
+ if (likely(error != 0))
+ goto out;
+ return AOP_TRUNCATED_PAGE;
}
error = __gfs2_readpage(file, page);
- gfs2_glock_dq(&gh);
+ gfs2_glock_dq(gh);
out:
- gfs2_holder_uninit(&gh);
- if (error == GLR_TRYFAILED) {
- yield();
- return AOP_TRUNCATED_PAGE;
- }
+ gfs2_holder_uninit(gh);
+ kfree(gh);
return error;
}
* Any I/O we ignore at this time will be done via readpage later.
* 2. We don't handle stuffed files here we let readpage do the honours.
* 3. mpage_readpages() does most of the heavy lifting in the common case.
- * 4. gfs2_get_block() is relied upon to set BH_Boundary in the right places.
+ * 4. gfs2_block_map() is relied upon to set BH_Boundary in the right places.
*/
static int gfs2_readpages(struct file *file, struct address_space *mapping,
if (unlikely(ret))
goto out_uninit;
if (!gfs2_is_stuffed(ip))
- ret = mpage_readpages(mapping, pages, nr_pages, gfs2_get_block);
+ ret = mpage_readpages(mapping, pages, nr_pages, gfs2_block_map);
gfs2_glock_dq(&gh);
out_uninit:
gfs2_holder_uninit(&gh);
if (error)
goto out_unlock;
- ip->i_alloc.al_requested = 0;
if (alloc_required) {
al = gfs2_alloc_get(ip);
+ if (!al) {
+ error = -ENOMEM;
+ goto out_unlock;
+ }
- error = gfs2_quota_lock(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
+ error = gfs2_quota_lock_check(ip);
if (error)
goto out_alloc_put;
- error = gfs2_quota_check(ip, ip->i_inode.i_uid, ip->i_inode.i_gid);
- if (error)
- goto out_qunlock;
-
al->al_requested = data_blocks + ind_blocks;
error = gfs2_inplace_reserve(ip);
if (error)
}
prepare_write:
- error = block_prepare_write(page, from, to, gfs2_get_block);
+ error = block_prepare_write(page, from, to, gfs2_block_map);
out:
if (error == 0)
return 0;
struct gfs2_inode *ip = GFS2_I(inode);
struct gfs2_sbd *sdp = GFS2_SB(inode);
struct buffer_head *dibh;
- struct gfs2_alloc *al = &ip->i_alloc;
+ struct gfs2_alloc *al = ip->i_alloc;
struct gfs2_dinode *di;
unsigned int from = pos & (PAGE_CACHE_SIZE - 1);
unsigned int to = from + len;
int ret;
- BUG_ON(gfs2_glock_is_locked_by_me(ip->i_gl) == 0);
+ BUG_ON(gfs2_glock_is_locked_by_me(ip->i_gl) == NULL);
ret = gfs2_meta_inode_buffer(ip, &dibh);
if (unlikely(ret)) {
ret = generic_write_end(file, mapping, pos, len, copied, page, fsdata);
- if (likely(ret >= 0)) {
- copied = ret;
- if ((pos + copied) > inode->i_size) {
- di = (struct gfs2_dinode *)dibh->b_data;
- ip->i_di.di_size = inode->i_size;
- di->di_size = cpu_to_be64(inode->i_size);
- mark_inode_dirty(inode);
- }
+ if (likely(ret >= 0) && (inode->i_size > ip->i_di.di_size)) {
+ di = (struct gfs2_dinode *)dibh->b_data;
+ ip->i_di.di_size = inode->i_size;
+ di->di_size = cpu_to_be64(inode->i_size);
+ mark_inode_dirty(inode);
}
if (inode == sdp->sd_rindex)
brelse(dibh);
gfs2_trans_end(sdp);
failed:
- if (al->al_requested) {
+ if (al) {
gfs2_inplace_release(ip);
gfs2_quota_unlock(ip);
gfs2_alloc_put(ip);
return 0;
if (!gfs2_is_stuffed(ip))
- dblock = generic_block_bmap(mapping, lblock, gfs2_get_block);
+ dblock = generic_block_bmap(mapping, lblock, gfs2_block_map);
gfs2_glock_dq_uninit(&i_gh);
.invalidatepage = gfs2_invalidatepage,
.releasepage = gfs2_releasepage,
.direct_IO = gfs2_direct_IO,
+ .migratepage = buffer_migrate_page,
};
static const struct address_space_operations gfs2_ordered_aops = {
.invalidatepage = gfs2_invalidatepage,
.releasepage = gfs2_releasepage,
.direct_IO = gfs2_direct_IO,
+ .migratepage = buffer_migrate_page,
};
static const struct address_space_operations gfs2_jdata_aops = {
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