mm: page_mkwrite change prototype to match fault

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

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 766b31ae3186e46f54d5d9fbe6fed621651c6520..7dd1b6d0bf323cf7e006fd309e76fc61bccfa58f 100644 (file)
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -596,13 +596,27 @@ struct btrfs_block_group_item {
 
 struct btrfs_space_info {
        u64 flags;
-       u64 total_bytes;
-       u64 bytes_used;
-       u64 bytes_pinned;
-       u64 bytes_reserved;
-       u64 bytes_readonly;
-       int full;
-       int force_alloc;
+
+       u64 total_bytes;        /* total bytes in the space */
+       u64 bytes_used;         /* total bytes used on disk */
+       u64 bytes_pinned;       /* total bytes pinned, will be freed when the
+                                  transaction finishes */
+       u64 bytes_reserved;     /* total bytes the allocator has reserved for
+                                  current allocations */
+       u64 bytes_readonly;     /* total bytes that are read only */
+
+       /* delalloc accounting */
+       u64 bytes_delalloc;     /* number of bytes reserved for allocation,
+                                  this space is not necessarily reserved yet
+                                  by the allocator */
+       u64 bytes_may_use;      /* number of bytes that may be used for
+                                  delalloc */
+
+       int full;               /* indicates that we cannot allocate any more
+                                  chunks for this space */
+       int force_alloc;        /* set if we need to force a chunk alloc for
+                                  this space */
+
        struct list_head list;
 
        /* for block groups in our same type */
@@ -770,7 +784,14 @@ struct btrfs_fs_info {
        struct list_head dirty_cowonly_roots;
 
        struct btrfs_fs_devices *fs_devices;
+
+       /*
+        * the space_info list is almost entirely read only.  It only changes
+        * when we add a new raid type to the FS, and that happens
+        * very rarely.  RCU is used to protect it.
+        */
        struct list_head space_info;
+
        spinlock_t delalloc_lock;
        spinlock_t new_trans_lock;
        u64 delalloc_bytes;
@@ -1782,6 +1803,18 @@ int btrfs_add_dead_reloc_root(struct btrfs_root *root);
 int btrfs_cleanup_reloc_trees(struct btrfs_root *root);
 int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len);
 u64 btrfs_reduce_alloc_profile(struct btrfs_root *root, u64 flags);
+void btrfs_set_inode_space_info(struct btrfs_root *root, struct inode *ionde);
+void btrfs_clear_space_info_full(struct btrfs_fs_info *info);
+
+int btrfs_check_metadata_free_space(struct btrfs_root *root);
+int btrfs_check_data_free_space(struct btrfs_root *root, struct inode *inode,
+                               u64 bytes);
+void btrfs_free_reserved_data_space(struct btrfs_root *root,
+                                   struct inode *inode, u64 bytes);
+void btrfs_delalloc_reserve_space(struct btrfs_root *root, struct inode *inode,
+                                u64 bytes);
+void btrfs_delalloc_free_space(struct btrfs_root *root, struct inode *inode,
+                             u64 bytes);
 /* ctree.c */
 int btrfs_previous_item(struct btrfs_root *root,
                        struct btrfs_path *path, u64 min_objectid,
@@ -2027,9 +2060,7 @@ int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
 unsigned long btrfs_force_ra(struct address_space *mapping,
                              struct file_ra_state *ra, struct file *file,
                              pgoff_t offset, pgoff_t last_index);
-int btrfs_check_free_space(struct btrfs_root *root, u64 num_required,
-                          int for_del);
-int btrfs_page_mkwrite(struct vm_area_struct *vma, struct page *page);
+int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
 int btrfs_readpage(struct file *file, struct page *page);
 void btrfs_delete_inode(struct inode *inode);
 void btrfs_put_inode(struct inode *inode);