#define BTRFS_MAX_LEVEL 8
+/*
+ * files bigger than this get some pre-flushing when they are added
+ * to the ordered operations list. That way we limit the total
+ * work done by the commit
+ */
+#define BTRFS_ORDERED_OPERATIONS_FLUSH_LIMIT (8 * 1024 * 1024)
+
/* holds pointers to all of the tree roots */
#define BTRFS_ROOT_TREE_OBJECTID 1ULL
int locks[BTRFS_MAX_LEVEL];
int reada;
/* keep some upper locks as we walk down */
- int keep_locks;
- int skip_locking;
int lowest_level;
/*
* set by btrfs_split_item, tells search_slot to keep all locks
* and to force calls to keep space in the nodes
*/
- int search_for_split;
+ unsigned int search_for_split:1;
+ unsigned int keep_locks:1;
+ unsigned int skip_locking:1;
+ unsigned int leave_spinning:1;
};
/*
struct rb_root block_group_cache_tree;
struct extent_io_tree pinned_extents;
- struct extent_io_tree pending_del;
- struct extent_io_tree extent_ins;
/* logical->physical extent mapping */
struct btrfs_mapping_tree mapping_tree;
u64 generation;
u64 last_trans_committed;
- u64 last_trans_new_blockgroup;
+
+ /*
+ * this is updated to the current trans every time a full commit
+ * is required instead of the faster short fsync log commits
+ */
+ u64 last_trans_log_full_commit;
u64 open_ioctl_trans;
unsigned long mount_opt;
u64 max_extent;
struct mutex tree_log_mutex;
struct mutex transaction_kthread_mutex;
struct mutex cleaner_mutex;
- struct mutex extent_ins_mutex;
struct mutex pinned_mutex;
struct mutex chunk_mutex;
struct mutex drop_mutex;
struct mutex volume_mutex;
struct mutex tree_reloc_mutex;
+
+ /*
+ * this protects the ordered operations list only while we are
+ * processing all of the entries on it. This way we make
+ * sure the commit code doesn't find the list temporarily empty
+ * because another function happens to be doing non-waiting preflush
+ * before jumping into the main commit.
+ */
+ struct mutex ordered_operations_mutex;
+
struct list_head trans_list;
struct list_head hashers;
struct list_head dead_roots;
* ordered extents
*/
spinlock_t ordered_extent_lock;
+
+ /*
+ * all of the data=ordered extents pending writeback
+ * these can span multiple transactions and basically include
+ * every dirty data page that isn't from nodatacow
+ */
struct list_head ordered_extents;
+
+ /*
+ * all of the inodes that have delalloc bytes. It is possible for
+ * this list to be empty even when there is still dirty data=ordered
+ * extents waiting to finish IO.
+ */
struct list_head delalloc_inodes;
+ /*
+ * special rename and truncate targets that must be on disk before
+ * we're allowed to commit. This is basically the ext3 style
+ * data=ordered list.
+ */
+ struct list_head ordered_operations;
+
/*
* there is a pool of worker threads for checksumming during writes
* and a pool for checksumming after reads. This is because readers
atomic_t throttle_gen;
u64 total_pinned;
+
+ /* protected by the delalloc lock, used to keep from writing
+ * metadata until there is a nice batch
+ */
+ u64 dirty_metadata_bytes;
struct list_head dirty_cowonly_roots;
struct btrfs_fs_devices *fs_devices;
}
/* extent-tree.c */
+int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
+ struct btrfs_root *root, unsigned long count);
int btrfs_lookup_extent(struct btrfs_root *root, u64 start, u64 len);
-int btrfs_lookup_extent_ref(struct btrfs_trans_handle *trans,
- struct btrfs_root *root, u64 bytenr,
- u64 num_bytes, u32 *refs);
int btrfs_update_pinned_extents(struct btrfs_root *root,
u64 bytenr, u64 num, int pin);
int btrfs_drop_leaf_ref(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct extent_buffer *leaf);
int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
struct btrfs_root *root, u64 objectid, u64 bytenr);
-int btrfs_extent_post_op(struct btrfs_trans_handle *trans,
- struct btrfs_root *root);
int btrfs_copy_pinned(struct btrfs_root *root, struct extent_io_tree *copy);
struct btrfs_block_group_cache *btrfs_lookup_block_group(
struct btrfs_fs_info *info,
u64 root_objectid, u64 ref_generation,
u64 owner_objectid);
int btrfs_update_extent_ref(struct btrfs_trans_handle *trans,
- struct btrfs_root *root, u64 bytenr,
+ struct btrfs_root *root, u64 bytenr, u64 num_bytes,
u64 orig_parent, u64 parent,
u64 root_objectid, u64 ref_generation,
u64 owner_objectid);
int btrfs_cow_block(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct extent_buffer *buf,
struct extent_buffer *parent, int parent_slot,
- struct extent_buffer **cow_ret, u64 prealloc_dest);
+ struct extent_buffer **cow_ret);
int btrfs_copy_root(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct extent_buffer *buf,
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_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);
git.samba.org / sfrench / cifs-2.6.git / blobdiff