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, 8 insertions, 5 deletions

diff --git a/fs/fat/fatent.c b/fs/fat/fatent.c
index da6eea47872f..618f5305c2e4 100644
--- a/fs/fat/fatent.c
+++ b/fs/fat/fatent.c
@@ -73,6 +73,8 @@ static int fat12_ent_bread(struct super_block *sb, struct fat_entry *fatent,
         struct buffer_head **bhs = fatent->bhs;
 
         WARN_ON(blocknr < MSDOS_SB(sb)->fat_start);
+        fatent->fat_inode = MSDOS_SB(sb)->fat_inode;
+
         bhs[0] = sb_bread(sb, blocknr);
         if (!bhs[0])
                 goto err;
@@ -103,6 +105,7 @@ static int fat_ent_bread(struct super_block *sb, struct fat_entry *fatent,
         struct fatent_operations *ops = MSDOS_SB(sb)->fatent_ops;
 
         WARN_ON(blocknr < MSDOS_SB(sb)->fat_start);
+        fatent->fat_inode = MSDOS_SB(sb)->fat_inode;
         fatent->bhs[0] = sb_bread(sb, blocknr);
         if (!fatent->bhs[0]) {
                 printk(KERN_ERR "FAT: FAT read failed (blocknr %llu)\n",
@@ -167,9 +170,9 @@ static void fat12_ent_put(struct fat_entry *fatent, int new)
         }
         spin_unlock(&fat12_entry_lock);
 
-        mark_buffer_dirty(fatent->bhs[0]);
+        mark_buffer_dirty_inode(fatent->bhs[0], fatent->fat_inode);
         if (fatent->nr_bhs == 2)
-                mark_buffer_dirty(fatent->bhs[1]);
+                mark_buffer_dirty_inode(fatent->bhs[1], fatent->fat_inode);
 }
 
 static void fat16_ent_put(struct fat_entry *fatent, int new)
@@ -178,7 +181,7 @@ static void fat16_ent_put(struct fat_entry *fatent, int new)
                 new = EOF_FAT16;
 
         *fatent->u.ent16_p = cpu_to_le16(new);
-        mark_buffer_dirty(fatent->bhs[0]);
+        mark_buffer_dirty_inode(fatent->bhs[0], fatent->fat_inode);
 }
 
 static void fat32_ent_put(struct fat_entry *fatent, int new)
@@ -189,7 +192,7 @@ static void fat32_ent_put(struct fat_entry *fatent, int new)
         WARN_ON(new & 0xf0000000);
         new |= le32_to_cpu(*fatent->u.ent32_p) & ~0x0fffffff;
         *fatent->u.ent32_p = cpu_to_le32(new);
-        mark_buffer_dirty(fatent->bhs[0]);
+        mark_buffer_dirty_inode(fatent->bhs[0], fatent->fat_inode);
 }
 
 static int fat12_ent_next(struct fat_entry *fatent)
@@ -381,7 +384,7 @@ static int fat_mirror_bhs(struct super_block *sb, struct buffer_head **bhs,
                         }
                         memcpy(c_bh->b_data, bhs[n]->b_data, sb->s_blocksize);
                         set_buffer_uptodate(c_bh);
-                        mark_buffer_dirty(c_bh);
+                        mark_buffer_dirty_inode(c_bh, sbi->fat_inode);
                         if (sb->s_flags & MS_SYNCHRONOUS)
                                 err = sync_dirty_buffer(c_bh);
                         brelse(c_bh);