f2fs: add infra struct and helper for inline dir

This patch defines macro/inline dentry structure, and adds some helpers for
inline dir infrastructure.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

1 files changed, 19 insertions, 2 deletions

diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index d41d1b725919..4fa0df5f54ea 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -46,8 +46,9 @@
 #define F2FS_MOUNT_DISABLE_EXT_IDENTIFY 0x00000040
 #define F2FS_MOUNT_INLINE_XATTR         0x00000080
 #define F2FS_MOUNT_INLINE_DATA          0x00000100
-#define F2FS_MOUNT_FLUSH_MERGE          0x00000200
-#define F2FS_MOUNT_NOBARRIER            0x00000400
+#define F2FS_MOUNT_INLINE_DENTRY        0x00000200
+#define F2FS_MOUNT_FLUSH_MERGE          0x00000400
+#define F2FS_MOUNT_NOBARRIER            0x00000800
 
 #define clear_opt(sbi, option)  (sbi->mount_opt.opt &= ~F2FS_MOUNT_##option)
 #define set_opt(sbi, option)    (sbi->mount_opt.opt |= F2FS_MOUNT_##option)
@@ -1058,6 +1059,7 @@ enum {
         FI_NO_EXTENT,           /* not to use the extent cache */
         FI_INLINE_XATTR,        /* used for inline xattr */
         FI_INLINE_DATA,         /* used for inline data*/
+        FI_INLINE_DENTRY,       /* used for inline dentry */
         FI_APPEND_WRITE,        /* inode has appended data */
         FI_UPDATE_WRITE,        /* inode has in-place-update data */
         FI_NEED_IPU,            /* used for ipu per file */
@@ -1104,6 +1106,8 @@ static inline void get_inline_info(struct f2fs_inode_info *fi,
                 set_inode_flag(fi, FI_INLINE_XATTR);
         if (ri->i_inline & F2FS_INLINE_DATA)
                 set_inode_flag(fi, FI_INLINE_DATA);
+        if (ri->i_inline & F2FS_INLINE_DENTRY)
+                set_inode_flag(fi, FI_INLINE_DENTRY);
 }
 
 static inline void set_raw_inline(struct f2fs_inode_info *fi,
@@ -1115,6 +1119,8 @@ static inline void set_raw_inline(struct f2fs_inode_info *fi,
                 ri->i_inline |= F2FS_INLINE_XATTR;
         if (is_inode_flag_set(fi, FI_INLINE_DATA))
                 ri->i_inline |= F2FS_INLINE_DATA;
+        if (is_inode_flag_set(fi, FI_INLINE_DENTRY))
+                ri->i_inline |= F2FS_INLINE_DENTRY;
 }
 
 static inline int f2fs_has_inline_xattr(struct inode *inode)
@@ -1165,6 +1171,17 @@ static inline void *inline_data_addr(struct page *page)
         return (void *)&(ri->i_addr[1]);
 }
 
+static inline int f2fs_has_inline_dentry(struct inode *inode)
+{
+        return is_inode_flag_set(F2FS_I(inode), FI_INLINE_DENTRY);
+}
+
+static inline void *inline_dentry_addr(struct page *page)
+{
+        struct f2fs_inode *ri = F2FS_INODE(page);
+        return (void *)&(ri->i_addr[1]);
+}
+
 static inline int f2fs_readonly(struct super_block *sb)
 {
         return sb->s_flags & MS_RDONLY;