Btrfs: proper -ENOSPC handling

[net-next-2.6.git] / fs / btrfs / ctree.h

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 80599b4e42bd350f5e6b7a094c3711a3dd32e8a8..b3959a150c3b331e327593dbc202171f94c71446 100644 (file)
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -675,18 +675,19 @@ struct btrfs_space_info {
                                   current allocations */
        u64 bytes_readonly;     /* total bytes that are read only */
        u64 bytes_super;        /* total bytes reserved for the super blocks */
-
-       /* delalloc accounting */
-       u64 bytes_delalloc;     /* number of bytes reserved for allocation,
-                                  this space is not necessarily reserved yet
-                                  by the allocator */
+       u64 bytes_root;         /* the number of bytes needed to commit a
+                                  transaction */
        u64 bytes_may_use;      /* number of bytes that may be used for
-                                  delalloc */
+                                  delalloc/allocations */
+       u64 bytes_delalloc;     /* number of bytes currently reserved for
+                                  delayed allocation */
 
        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 */
+       int force_delalloc;     /* make people start doing filemap_flush until
+                                  we're under a threshold */
 
        struct list_head list;
 
@@ -695,6 +696,9 @@ struct btrfs_space_info {
        spinlock_t lock;
        struct rw_semaphore groups_sem;
        atomic_t caching_threads;
+
+       int allocating_chunk;
+       wait_queue_head_t wait;
 };
 
 /*
@@ -2022,7 +2026,12 @@ 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_reserve_metadata_space(struct btrfs_root *root, int num_items);
+int btrfs_unreserve_metadata_space(struct btrfs_root *root, int num_items);
+int btrfs_unreserve_metadata_for_delalloc(struct btrfs_root *root,
+                                         struct inode *inode, int num_items);
+int btrfs_reserve_metadata_for_delalloc(struct btrfs_root *root,
+                                       struct inode *inode, int num_items);
 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,