hfsplus: add per-superblock lock for volume header updates

[pandora-kernel.git] / fs / hfsplus / hfsplus_fs.h

diff --git a/fs/hfsplus/hfsplus_fs.h b/fs/hfsplus/hfsplus_fs.h
index dc856be..08865ed 100644 (file)
--- a/fs/hfsplus/hfsplus_fs.h
+++ b/fs/hfsplus/hfsplus_fs.h
@@ -121,16 +121,21 @@ struct hfsplus_sb_info {
        u32 sect_count;
        int fs_shift;
 
-       /* Stuff in host order from Vol Header */
+       /* immutable data from the volume header */
        u32 alloc_blksz;
        int alloc_blksz_shift;
        u32 total_blocks;
+       u32 data_clump_blocks, rsrc_clump_blocks;
+
+       /* mutable data from the volume header, protected by alloc_mutex */
        u32 free_blocks;
-       u32 next_alloc;
+       struct mutex alloc_mutex;
+
+       /* mutable data from the volume header, protected by vh_mutex */
        u32 next_cnid;
        u32 file_count;
        u32 folder_count;
-       u32 data_clump_blocks, rsrc_clump_blocks;
+       struct mutex vh_mutex;
 
        /* Config options */
        u32 creator;
@@ -143,8 +148,6 @@ struct hfsplus_sb_info {
        int part, session;
 
        unsigned long flags;
-
-       struct hlist_head rsrc_inodes;
 };
 
 #define HFSPLUS_SB_WRITEBACKUP 0x0001
@@ -184,8 +187,8 @@ struct hfsplus_inode_info {
 #define HFSPLUS_FLG_EXT_DIRTY  0x0002
 #define HFSPLUS_FLG_EXT_NEW    0x0004
 
-#define HFSPLUS_IS_DATA(inode)   (!(HFSPLUS_I(inode).flags & HFSPLUS_FLG_RSRC))
-#define HFSPLUS_IS_RSRC(inode)   (HFSPLUS_I(inode).flags & HFSPLUS_FLG_RSRC)
+#define HFSPLUS_IS_DATA(inode)   (!(HFSPLUS_I(inode)->flags & HFSPLUS_FLG_RSRC))
+#define HFSPLUS_IS_RSRC(inode)   (HFSPLUS_I(inode)->flags & HFSPLUS_FLG_RSRC)
 
 struct hfs_find_data {
        /* filled by caller */
@@ -372,18 +375,15 @@ int hfsplus_read_wrapper(struct super_block *);
 int hfs_part_find(struct super_block *, sector_t *, sector_t *);
 
 /* access macros */
-/*
 static inline struct hfsplus_sb_info *HFSPLUS_SB(struct super_block *sb)
 {
        return sb->s_fs_info;
 }
+
 static inline struct hfsplus_inode_info *HFSPLUS_I(struct inode *inode)
 {
        return list_entry(inode, struct hfsplus_inode_info, vfs_inode);
 }
-*/
-#define HFSPLUS_SB(super)      (*(struct hfsplus_sb_info *)(super)->s_fs_info)
-#define HFSPLUS_I(inode)       (*list_entry(inode, struct hfsplus_inode_info, vfs_inode))
 
 #if 1
 #define hfsplus_kmap(p)                ({ struct page *__p = (p); kmap(__p); })