f2fs: introduce f2fs_do_tmpfile for code consistency

This patch adds f2fs_do_tmpfile to eliminate the redundant init_inode_metadata
flow.
Throught this, we can provide the consistent lock usage, e.g., fi->i_sem,  and
this will enable better debugging stuffs.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

3 files changed, 33 insertions, 25 deletions

diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c
index 3677f4124541..fb7e01ed47dc 100644
--- a/fs/f2fs/dir.c
+++ b/fs/f2fs/dir.c
@@ -337,8 +337,7 @@ static struct page *init_inode_metadata(struct inode *inode,
         struct page *page;
         int err;
 
-        if (is_inode_flag_set(F2FS_I(inode), FI_NEW_INODE) &&
-                        inode->i_nlink) {
+        if (is_inode_flag_set(F2FS_I(inode), FI_NEW_INODE)) {
                 page = new_inode_page(inode, name);
                 if (IS_ERR(page))
                         return page;
@@ -364,7 +363,8 @@ static struct page *init_inode_metadata(struct inode *inode,
                 set_cold_node(inode, page);
         }
 
-        init_dent_inode(name, page);
+        if (name)
+                init_dent_inode(name, page);
 
         /*
          * This file should be checkpointed during fsync.
@@ -537,6 +537,27 @@ fail:
         return err;
 }
 
+int f2fs_do_tmpfile(struct inode *inode, struct inode *dir)
+{
+        struct page *page;
+        int err = 0;
+
+        down_write(&F2FS_I(inode)->i_sem);
+        page = init_inode_metadata(inode, dir, NULL);
+        if (IS_ERR(page)) {
+                err = PTR_ERR(page);
+                goto fail;
+        }
+        /* we don't need to mark_inode_dirty now */
+        update_inode(inode, page);
+        f2fs_put_page(page, 1);
+
+        clear_inode_flag(F2FS_I(inode), FI_NEW_INODE);
+fail:
+        up_write(&F2FS_I(inode)->i_sem);
+        return err;
+}
+
 /*
  * It only removes the dentry from the dentry page,corresponding name
  * entry in name page does not need to be touched during deletion.
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 58df97e174d0..ca421a8e47d9 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -1136,6 +1136,7 @@ void f2fs_set_link(struct inode *, struct f2fs_dir_entry *,
 int update_dent_inode(struct inode *, const struct qstr *);
 int __f2fs_add_link(struct inode *, const struct qstr *, struct inode *);
 void f2fs_delete_entry(struct f2fs_dir_entry *, struct page *, struct inode *);
+int f2fs_do_tmpfile(struct inode *, struct inode *);
 int f2fs_make_empty(struct inode *, struct inode *);
 bool f2fs_empty_dir(struct inode *);
 
diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
index 5c08c546e4c8..1994d2e449d6 100644
--- a/fs/f2fs/namei.c
+++ b/fs/f2fs/namei.c
@@ -493,7 +493,6 @@ 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);
@@ -508,38 +507,25 @@ static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
         err = acquire_orphan_inode(sbi);
         if (err)
                 goto out;
+
+        err = f2fs_do_tmpfile(inode, dir);
+        if (err)
+                goto release_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);
+
+release_out:
+        release_orphan_inode(sbi);
 out:
         f2fs_unlock_op(sbi);
         clear_nlink(inode);