[PATCH v4 05/15] f2fs: move fscrypt to filesystem inode

[Christian Brauner <brauner@kernel.org>]

Move fscrypt data pointer into the filesystem's private inode and record
the offset from the embedded struct inode.

This will allow us to drop the fscrypt data pointer from struct inode
itself and move it into the filesystem's inode.

Signed-off-by: Christian Brauner <brauner@kernel.org>
---
 fs/f2fs/f2fs.h  | 3 +++
 fs/f2fs/super.c | 7 +++++++
 2 files changed, 10 insertions(+)

diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 9333a22b9a01..53cb6b6fc70b 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -905,6 +905,9 @@ struct f2fs_inode_info {
 
 	unsigned int atomic_write_cnt;
 	loff_t original_i_size;		/* original i_size before atomic write */
+#ifdef CONFIG_FS_ENCRYPTION
+	struct fscrypt_inode_info *i_crypt_info; /* filesystem encryption info */
+#endif
 };
 
 static inline void get_read_extent_info(struct extent_info *ext,
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index bbf1dad6843f..dab4078c2f6a 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -1453,6 +1453,9 @@ static struct inode *f2fs_alloc_inode(struct super_block *sb)
 
 	/* Will be used by directory only */
 	fi->i_dir_level = F2FS_SB(sb)->dir_level;
+#ifdef CONFIG_FS_ENCRYPTION
+	fi->i_crypt_info = NULL;
+#endif
 
 	return &fi->vfs_inode;
 }
@@ -3326,6 +3329,10 @@ static struct block_device **f2fs_get_devices(struct super_block *sb,
 }
 
 static const struct fscrypt_operations f2fs_cryptops = {
+#ifdef CONFIG_FS_ENCRYPTION
+	.inode_info_offs	= offsetof(struct f2fs_inode_info, i_crypt_info) -
+				  offsetof(struct f2fs_inode_info, vfs_inode),
+#endif
 	.needs_bounce_pages	= 1,
 	.has_32bit_inodes	= 1,
 	.supports_subblock_data_units = 1,

-- 
2.47.2