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f2fs: add a new function: f2fs_reserve_block()

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Add the function f2fs_reserve_block() to easily reserve new blocks, and
use it to clean up more codes.

Signed-off-by: Huajun Li <huajun.li@intel.com>
Signed-off-by: Haicheng Li <haicheng.li@linux.intel.com>
Signed-off-by: Weihong Xu <weihong.xu@intel.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
This commit is contained in:
Huajun Li 2013-11-10 23:13:18 +08:00 committed by Jaegeuk Kim
parent 0daaad97dc
commit b600965c43
3 changed files with 31 additions and 60 deletions
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50
fs/f2fs/data.c
View file

@ -64,6 +64,22 @@ int reserve_new_block(struct dnode_of_data *dn)
return 0;
}
int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index)
{
bool need_put = dn->inode_page ? false : true;
int err;
err = get_dnode_of_data(dn, index, ALLOC_NODE);
if (err)
return err;
if (dn->data_blkaddr == NULL_ADDR)
err = reserve_new_block(dn);
if (need_put)
f2fs_put_dnode(dn);
return err;
}
static int check_extent_cache(struct inode *inode, pgoff_t pgofs,
struct buffer_head *bh_result)
{
@ -314,19 +330,10 @@ struct page *get_new_data_page(struct inode *inode,
int err;
set_new_dnode(&dn, inode, npage, npage, 0);
err = get_dnode_of_data(&dn, index, ALLOC_NODE);
err = f2fs_reserve_block(&dn, index);
if (err)
return ERR_PTR(err);
if (dn.data_blkaddr == NULL_ADDR) {
if (reserve_new_block(&dn)) {
if (!npage)
f2fs_put_dnode(&dn);
return ERR_PTR(-ENOSPC);
}
}
if (!npage)
f2fs_put_dnode(&dn);
repeat:
page = grab_cache_page(mapping, index);
if (!page)
@ -707,21 +714,15 @@ static int f2fs_write_begin(struct file *file, struct address_space *mapping,
*pagep = page;
f2fs_lock_op(sbi);
set_new_dnode(&dn, inode, NULL, NULL, 0);
err = get_dnode_of_data(&dn, index, ALLOC_NODE);
if (err)
goto err;
if (dn.data_blkaddr == NULL_ADDR)
err = reserve_new_block(&dn);
f2fs_put_dnode(&dn);
if (err)
goto err;
err = f2fs_reserve_block(&dn, index);
f2fs_unlock_op(sbi);
if (err) {
f2fs_put_page(page, 1);
return err;
}
if ((len == PAGE_CACHE_SIZE) || PageUptodate(page))
return 0;
@ -754,11 +755,6 @@ static int f2fs_write_begin(struct file *file, struct address_space *mapping,
SetPageUptodate(page);
clear_cold_data(page);
return 0;
err:
f2fs_unlock_op(sbi);
f2fs_put_page(page, 1);
return err;
}
static int f2fs_write_end(struct file *file,

1
fs/f2fs/f2fs.h
View file

@ -1130,6 +1130,7 @@ void destroy_checkpoint_caches(void);
* data.c
*/
int reserve_new_block(struct dnode_of_data *);
int f2fs_reserve_block(struct dnode_of_data *, pgoff_t);
void update_extent_cache(block_t, struct dnode_of_data *);
struct page *find_data_page(struct inode *, pgoff_t, bool);
struct page *get_lock_data_page(struct inode *, pgoff_t);

40
fs/f2fs/file.c
View file

@ -33,7 +33,6 @@ static int f2fs_vm_page_mkwrite(struct vm_area_struct *vma,
struct page *page = vmf->page;
struct inode *inode = file_inode(vma->vm_file);
struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb);
block_t old_blk_addr;
struct dnode_of_data dn;
int err;
@ -44,24 +43,10 @@ static int f2fs_vm_page_mkwrite(struct vm_area_struct *vma,
/* block allocation */
f2fs_lock_op(sbi);
set_new_dnode(&dn, inode, NULL, NULL, 0);
err = get_dnode_of_data(&dn, page->index, ALLOC_NODE);
if (err) {
f2fs_unlock_op(sbi);
goto out;
}
old_blk_addr = dn.data_blkaddr;
if (old_blk_addr == NULL_ADDR) {
err = reserve_new_block(&dn);
if (err) {
f2fs_put_dnode(&dn);
f2fs_unlock_op(sbi);
goto out;
}
}
f2fs_put_dnode(&dn);
err = f2fs_reserve_block(&dn, page->index);
f2fs_unlock_op(sbi);
if (err)
goto out;
file_update_time(vma->vm_file);
lock_page(page);
@ -532,22 +517,11 @@ static int expand_inode_data(struct inode *inode, loff_t offset,
f2fs_lock_op(sbi);
set_new_dnode(&dn, inode, NULL, NULL, 0);
ret = get_dnode_of_data(&dn, index, ALLOC_NODE);
if (ret) {
f2fs_unlock_op(sbi);
break;
}
if (dn.data_blkaddr == NULL_ADDR) {
ret = reserve_new_block(&dn);
if (ret) {
f2fs_put_dnode(&dn);
f2fs_unlock_op(sbi);
break;
}
}
f2fs_put_dnode(&dn);
ret = f2fs_reserve_block(&dn, index);
f2fs_unlock_op(sbi);
if (ret)
break;
if (pg_start == pg_end)
new_size = offset + len;