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f2fs: refactor f2fs_convert_inline_data

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Change log from v1:
 o handle NULL pointer of grab_cache_page_write_begin() pointed by Chao Yu.

This patch refactors f2fs_convert_inline_data to check a couple of conditions
internally for deciding whether it needs to convert inline_data or not.

So, the new f2fs_convert_inline_data initially checks:
1) f2fs_has_inline_data(), and
2) the data size to be changed.

If the inode has inline_data but the size to fill is less than MAX_INLINE_DATA,
then we don't need to convert the inline_data with data allocation.

Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
This commit is contained in:
Jaegeuk Kim 2013-12-27 12:28:59 +09:00
parent 26f466f4a9
commit 9e09fc855d
4 changed files with 28 additions and 41 deletions
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16
fs/f2fs/data.c
View file

@ -906,21 +906,17 @@ static int f2fs_write_begin(struct file *file, struct address_space *mapping,
f2fs_balance_fs(sbi);
repeat:
err = f2fs_convert_inline_data(inode, pos + len);
if (err)
return err;
page = grab_cache_page_write_begin(mapping, index, flags);
if (!page)
return -ENOMEM;
*pagep = page;
if ((pos + len) < MAX_INLINE_DATA) {
if (f2fs_has_inline_data(inode))
goto inline_data;
} else if (f2fs_has_inline_data(inode)) {
err = f2fs_convert_inline_data(inode, page, flags);
if (err) {
f2fs_put_page(page, 1);
return err;
}
}
if (f2fs_has_inline_data(inode) && (pos + len) <= MAX_INLINE_DATA)
goto inline_data;
f2fs_lock_op(sbi);
set_new_dnode(&dn, inode, NULL, NULL, 0);

2
fs/f2fs/f2fs.h
View file

@ -1302,6 +1302,6 @@ extern const struct inode_operations f2fs_special_inode_operations;
inline int f2fs_has_inline_data(struct inode *);
bool f2fs_may_inline(struct inode *);
int f2fs_read_inline_data(struct inode *, struct page *);
int f2fs_convert_inline_data(struct inode *, struct page *, unsigned);
int f2fs_convert_inline_data(struct inode *, pgoff_t);
int f2fs_write_inline_data(struct inode *, struct page *, unsigned int);
#endif

25
fs/f2fs/file.c
View file

@ -370,17 +370,12 @@ int f2fs_setattr(struct dentry *dentry, struct iattr *attr)
if ((attr->ia_valid & ATTR_SIZE) &&
attr->ia_size != i_size_read(inode)) {
if (f2fs_has_inline_data(inode) &&
(attr->ia_size > MAX_INLINE_DATA)) {
unsigned flags = AOP_FLAG_NOFS;
err = f2fs_convert_inline_data(inode, NULL, flags);
if (err)
return err;
}
err = f2fs_convert_inline_data(inode, attr->ia_size);
if (err)
return err;
truncate_setsize(inode, attr->ia_size);
if (!f2fs_has_inline_data(inode))
f2fs_truncate(inode);
f2fs_truncate(inode);
f2fs_balance_fs(F2FS_SB(inode->i_sb));
}
@ -462,7 +457,7 @@ static int punch_hole(struct inode *inode, loff_t offset, loff_t len)
loff_t off_start, off_end;
int ret = 0;
ret = f2fs_convert_inline_data(inode, NULL, AOP_FLAG_NOFS);
ret = f2fs_convert_inline_data(inode, MAX_INLINE_DATA + 1);
if (ret)
return ret;
@ -512,16 +507,14 @@ static int expand_inode_data(struct inode *inode, loff_t offset,
loff_t off_start, off_end;
int ret = 0;
if (f2fs_has_inline_data(inode) && (offset + len > MAX_INLINE_DATA)) {
ret = f2fs_convert_inline_data(inode, NULL, AOP_FLAG_NOFS);
if (ret)
return ret;
}
ret = inode_newsize_ok(inode, (len + offset));
if (ret)
return ret;
ret = f2fs_convert_inline_data(inode, offset + len);
if (ret)
return ret;
pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT;
pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT;

26
fs/f2fs/inline.c
View file

@ -101,6 +101,7 @@ static int __f2fs_convert_inline_data(struct inode *inode, struct page *page)
dst_addr = kmap(page);
memcpy(dst_addr, src_addr, MAX_INLINE_DATA);
kunmap(page);
SetPageUptodate(page);
/* write data page to try to make data consistent */
set_page_writeback(page);
@ -120,25 +121,22 @@ static int __f2fs_convert_inline_data(struct inode *inode, struct page *page)
return err;
}
int f2fs_convert_inline_data(struct inode *inode,
struct page *p, unsigned flags)
int f2fs_convert_inline_data(struct inode *inode, pgoff_t to_size)
{
int err;
struct page *page;
int err;
if (!p || p->index) {
page = grab_cache_page_write_begin(inode->i_mapping, 0, flags);
if (IS_ERR(page))
return PTR_ERR(page);
} else {
page = p;
}
if (!f2fs_has_inline_data(inode))
return 0;
else if (to_size <= MAX_INLINE_DATA)
return 0;
page = grab_cache_page_write_begin(inode->i_mapping, 0, AOP_FLAG_NOFS);
if (!page)
return -ENOMEM;
err = __f2fs_convert_inline_data(inode, page);
if (!p || p->index)
f2fs_put_page(page, 1);
f2fs_put_page(page, 1);
return err;
}