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Date: Thu, 19 Jun 2014 16:23:19 +0800
From: Chao Yu <chao2.yu@...sung.com>
To: Jaegeuk Kim <jaegeuk@...nel.org>,
Changman Lee <cm224.lee@...sung.com>
Cc: linux-f2fs-devel@...ts.sourceforge.net,
linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [f2fs-dev][PATCH] 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: Chao Yu <chao2.yu@...sung.com>
---
fs/f2fs/dir.c | 10 ++++++++-
fs/f2fs/namei.c | 64 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 73 insertions(+), 1 deletion(-)
diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c
index 966acb0..09760d5 100644
--- a/fs/f2fs/dir.c
+++ b/fs/f2fs/dir.c
@@ -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;
diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
index 9138c32..0d55517 100644
--- a/fs/f2fs/namei.c
+++ b/fs/f2fs/namei.c
@@ -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"
@@ -488,6 +489,68 @@ out:
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,
@@ -498,6 +561,7 @@ 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,
--
1.7.9.5
--
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