提交 50732df0 编写于 作者: C Chao Yu 提交者: Jaegeuk Kim

f2fs: support ->tmpfile()

Add function f2fs_tmpfile() to support O_TMPFILE file creation, and modify logic
of init_inode_metadata to enable linkat temp file.
Signed-off-by: NChao Yu <chao2.yu@samsung.com>
Signed-off-by: NJaegeuk Kim <jaegeuk@kernel.org>
上级 ca0a81b3
......@@ -333,10 +333,12 @@ static int make_empty_dir(struct inode *inode,
static struct page *init_inode_metadata(struct inode *inode,
struct inode *dir, const struct qstr *name)
{
struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
struct page *page;
int err;
if (is_inode_flag_set(F2FS_I(inode), FI_NEW_INODE)) {
if (is_inode_flag_set(F2FS_I(inode), FI_NEW_INODE) &&
inode->i_nlink) {
page = new_inode_page(inode, name);
if (IS_ERR(page))
return page;
......@@ -370,6 +372,12 @@ static struct page *init_inode_metadata(struct inode *inode,
*/
if (is_inode_flag_set(F2FS_I(inode), FI_INC_LINK)) {
file_lost_pino(inode);
/*
* If link the tmpfile to alias through linkat path,
* we should remove this inode from orphan list.
*/
if (inode->i_nlink == 0)
remove_orphan_inode(sbi, inode->i_ino);
inc_nlink(inode);
}
return page;
......
......@@ -13,6 +13,7 @@
#include <linux/pagemap.h>
#include <linux/sched.h>
#include <linux/ctype.h>
#include <linux/dcache.h>
#include "f2fs.h"
#include "node.h"
......@@ -487,6 +488,68 @@ static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry,
return err;
}
static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
{
struct super_block *sb = dir->i_sb;
struct f2fs_sb_info *sbi = F2FS_SB(sb);
struct inode *inode;
struct page *page;
int err;
inode = f2fs_new_inode(dir, mode);
if (IS_ERR(inode))
return PTR_ERR(inode);
inode->i_op = &f2fs_file_inode_operations;
inode->i_fop = &f2fs_file_operations;
inode->i_mapping->a_ops = &f2fs_dblock_aops;
f2fs_lock_op(sbi);
err = acquire_orphan_inode(sbi);
if (err)
goto out;
/*
* add this non-linked tmpfile to orphan list, in this way we could
* remove all unused data of tmpfile after abnormal power-off.
*/
add_orphan_inode(sbi, inode->i_ino);
page = new_inode_page(inode, NULL);
if (IS_ERR(page)) {
err = PTR_ERR(page);
goto remove_out;
}
err = f2fs_init_acl(inode, dir, page);
if (err)
goto unlock_out;
err = f2fs_init_security(inode, dir, NULL, page);
if (err)
goto unlock_out;
f2fs_put_page(page, 1);
f2fs_unlock_op(sbi);
alloc_nid_done(sbi, inode->i_ino);
mark_inode_dirty(inode);
d_tmpfile(dentry, inode);
unlock_new_inode(inode);
return 0;
unlock_out:
f2fs_put_page(page, 1);
remove_out:
remove_orphan_inode(sbi, inode->i_ino);
out:
f2fs_unlock_op(sbi);
clear_nlink(inode);
unlock_new_inode(inode);
make_bad_inode(inode);
iput(inode);
alloc_nid_failed(sbi, inode->i_ino);
return err;
}
const struct inode_operations f2fs_dir_inode_operations = {
.create = f2fs_create,
.lookup = f2fs_lookup,
......@@ -497,6 +560,7 @@ const struct inode_operations f2fs_dir_inode_operations = {
.rmdir = f2fs_rmdir,
.mknod = f2fs_mknod,
.rename = f2fs_rename,
.tmpfile = f2fs_tmpfile,
.getattr = f2fs_getattr,
.setattr = f2fs_setattr,
.get_acl = f2fs_get_acl,
......
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