filesystem freeze: add error handling of write_super_lockfs/unlockfs

[linux-2.6-omap-h63xx.git] / include / linux / fs.h

diff --git a/include/linux/fs.h b/include/linux/fs.h
index d7eba77f666e9558e31061b3a63d7b5d720c4a82..3e59182de9df4cff5c5e4166323a7c91edf80188 100644 (file)
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -565,6 +565,7 @@ struct address_space {
 struct block_device {
        dev_t                   bd_dev;  /* not a kdev_t - it's a search key */
        struct inode *          bd_inode;       /* will die */
+       struct super_block *    bd_super;
        int                     bd_openers;
        struct mutex            bd_mutex;       /* open/close mutex */
        struct semaphore        bd_mount_sem;
@@ -1184,6 +1185,11 @@ struct super_block {
         * generic_show_options()
         */
        char *s_options;
+
+       /*
+        * storage for asynchronous operations
+        */
+       struct list_head s_async_list;
 };
 
 extern struct timespec current_fs_time(struct super_block *sb);
@@ -1371,8 +1377,8 @@ struct super_operations {
        void (*put_super) (struct super_block *);
        void (*write_super) (struct super_block *);
        int (*sync_fs)(struct super_block *sb, int wait);
-       void (*write_super_lockfs) (struct super_block *);
-       void (*unlockfs) (struct super_block *);
+       int (*freeze_fs) (struct super_block *);
+       int (*unfreeze_fs) (struct super_block *);
        int (*statfs) (struct dentry *, struct kstatfs *);
        int (*remount_fs) (struct super_block *, int *, char *);
        void (*clear_inode) (struct inode *);
@@ -1384,6 +1390,7 @@ struct super_operations {
        ssize_t (*quota_read)(struct super_block *, int, char *, size_t, loff_t);
        ssize_t (*quota_write)(struct super_block *, int, const char *, size_t, loff_t);
 #endif
+       int (*bdev_try_to_free_page)(struct super_block*, struct page*, gfp_t);
 };
 
 /*