Sanitize ->fsync() for FAT

* mark directory data blocks as assoc. metadata
* add new inode to deal with FAT, mark FAT blocks as assoc. metadata of that
* now ->fsync() is trivial both for files and directories

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

1 files changed, 6 insertions, 0 deletions

diff --git a/fs/fat/fat.h b/fs/fat/fat.h
index ea440d65819c..e4d88527b5dd 100644
--- a/fs/fat/fat.h
+++ b/fs/fat/fat.h
@@ -74,6 +74,7 @@ struct msdos_sb_info {
 
         int fatent_shift;
         struct fatent_operations *fatent_ops;
+        struct inode *fat_inode;
 
         spinlock_t inode_hash_lock;
         struct hlist_head inode_hashtable[FAT_HASH_SIZE];
@@ -251,6 +252,7 @@ struct fat_entry {
         } u;
         int nr_bhs;
         struct buffer_head *bhs[2];
+        struct inode *fat_inode;
 };
 
 static inline void fatent_init(struct fat_entry *fatent)
@@ -259,6 +261,7 @@ static inline void fatent_init(struct fat_entry *fatent)
         fatent->entry = 0;
         fatent->u.ent32_p = NULL;
         fatent->bhs[0] = fatent->bhs[1] = NULL;
+        fatent->fat_inode = NULL;
 }
 
 static inline void fatent_set_entry(struct fat_entry *fatent, int entry)
@@ -275,6 +278,7 @@ static inline void fatent_brelse(struct fat_entry *fatent)
                 brelse(fatent->bhs[i]);
         fatent->nr_bhs = 0;
         fatent->bhs[0] = fatent->bhs[1] = NULL;
+        fatent->fat_inode = NULL;
 }
 
 extern void fat_ent_access_init(struct super_block *sb);
@@ -296,6 +300,8 @@ extern int fat_setattr(struct dentry * dentry, struct iattr * attr);
 extern void fat_truncate(struct inode *inode);
 extern int fat_getattr(struct vfsmount *mnt, struct dentry *dentry,
                        struct kstat *stat);
+extern int fat_file_fsync(struct file *file, struct dentry *dentry,
+                          int datasync);
 
 /* fat/inode.c */
 extern void fat_attach(struct inode *inode, loff_t i_pos);