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Commit 50732df0 authored by Chao Yu's avatar Chao Yu Committed by Jaegeuk Kim
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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: default avatarChao Yu <chao2.yu@samsung.com>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent ca0a81b3

fs/f2fs/dir.c

+9 −1
Original line number Diff line number Diff line
@@ -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;

fs/f2fs/namei.c

+64 −0
Original line number Diff line number Diff line
@@ -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,