diff options
Diffstat (limited to 'fs/btrfs/ctree.h')
| -rw-r--r-- | fs/btrfs/ctree.h | 84 |
1 files changed, 49 insertions, 35 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 9417713542a2..ad96495dedc5 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -143,12 +143,15 @@ static int btrfs_csum_sizes[] = { 4, 0 }; #define BTRFS_FT_MAX 9 /* - * the key defines the order in the tree, and so it also defines (optimal) - * block layout. objectid corresonds to the inode number. The flags - * tells us things about the object, and is a kind of stream selector. - * so for a given inode, keys with flags of 1 might refer to the inode - * data, flags of 2 may point to file data in the btree and flags == 3 - * may point to extents. + * The key defines the order in the tree, and so it also defines (optimal) + * block layout. + * + * objectid corresponds to the inode number. + * + * type tells us things about the object, and is a kind of stream selector. + * so for a given inode, keys with type of 1 might refer to the inode data, + * type of 2 may point to file data in the btree and type == 3 may point to + * extents. * * offset is the starting byte offset for this key in the stream. * @@ -200,7 +203,7 @@ struct btrfs_dev_item { /* * starting byte of this partition on the device, - * to allowr for stripe alignment in the future + * to allow for stripe alignment in the future */ __le64 start_offset; @@ -633,18 +636,35 @@ struct btrfs_space_info { struct rw_semaphore groups_sem; }; -struct btrfs_free_space { - struct rb_node bytes_index; - struct rb_node offset_index; - u64 offset; - u64 bytes; +/* + * free clusters are used to claim free space in relatively large chunks, + * allowing us to do less seeky writes. They are used for all metadata + * allocations and data allocations in ssd mode. + */ +struct btrfs_free_cluster { + spinlock_t lock; + spinlock_t refill_lock; + struct rb_root root; + + /* largest extent in this cluster */ + u64 max_size; + + /* first extent starting offset */ + u64 window_start; + + struct btrfs_block_group_cache *block_group; + /* + * when a cluster is allocated from a block group, we put the + * cluster onto a list in the block group so that it can + * be freed before the block group is freed. + */ + struct list_head block_group_list; }; struct btrfs_block_group_cache { struct btrfs_key key; struct btrfs_block_group_item item; spinlock_t lock; - struct mutex alloc_mutex; struct mutex cache_mutex; u64 pinned; u64 reserved; @@ -656,6 +676,7 @@ struct btrfs_block_group_cache { struct btrfs_space_info *space_info; /* free space cache stuff */ + spinlock_t tree_lock; struct rb_root free_space_bytes; struct rb_root free_space_offset; @@ -667,6 +688,11 @@ struct btrfs_block_group_cache { /* usage count */ atomic_t count; + + /* List of struct btrfs_free_clusters for this block group. + * Today it will only have one thing on it, but that may change + */ + struct list_head cluster_list; }; struct btrfs_leaf_ref_tree { @@ -728,7 +754,6 @@ struct btrfs_fs_info { struct mutex tree_log_mutex; struct mutex transaction_kthread_mutex; struct mutex cleaner_mutex; - struct mutex pinned_mutex; struct mutex chunk_mutex; struct mutex drop_mutex; struct mutex volume_mutex; @@ -839,8 +864,12 @@ struct btrfs_fs_info { spinlock_t delalloc_lock; spinlock_t new_trans_lock; u64 delalloc_bytes; - u64 last_alloc; - u64 last_data_alloc; + + /* data_alloc_cluster is only used in ssd mode */ + struct btrfs_free_cluster data_alloc_cluster; + + /* all metadata allocations go through this cluster */ + struct btrfs_free_cluster meta_alloc_cluster; spinlock_t ref_cache_lock; u64 total_ref_cache_size; @@ -932,7 +961,6 @@ struct btrfs_root { }; /* - * inode items have the data typically returned from stat and store other * info about object characteristics. There is one for every file and dir in * the FS @@ -963,7 +991,7 @@ struct btrfs_root { #define BTRFS_EXTENT_CSUM_KEY 128 /* - * root items point to tree roots. There are typically in the root + * root items point to tree roots. They are typically in the root * tree used by the super block to find all the other trees */ #define BTRFS_ROOT_ITEM_KEY 132 @@ -1010,6 +1038,8 @@ struct btrfs_root { #define BTRFS_MOUNT_SSD (1 << 3) #define BTRFS_MOUNT_DEGRADED (1 << 4) #define BTRFS_MOUNT_COMPRESS (1 << 5) +#define BTRFS_MOUNT_NOTREELOG (1 << 6) +#define BTRFS_MOUNT_FLUSHONCOMMIT (1 << 7) #define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt) #define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt) @@ -1748,6 +1778,7 @@ static inline struct dentry *fdentry(struct file *file) } /* extent-tree.c */ +void btrfs_put_block_group(struct btrfs_block_group_cache *cache); 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); @@ -2174,21 +2205,4 @@ int btrfs_check_acl(struct inode *inode, int mask); int btrfs_init_acl(struct inode *inode, struct inode *dir); int btrfs_acl_chmod(struct inode *inode); -/* free-space-cache.c */ -int btrfs_add_free_space(struct btrfs_block_group_cache *block_group, - u64 bytenr, u64 size); -int btrfs_add_free_space_lock(struct btrfs_block_group_cache *block_group, - u64 offset, u64 bytes); -int btrfs_remove_free_space(struct btrfs_block_group_cache *block_group, - u64 bytenr, u64 size); -int btrfs_remove_free_space_lock(struct btrfs_block_group_cache *block_group, - u64 offset, u64 bytes); -void btrfs_remove_free_space_cache(struct btrfs_block_group_cache - *block_group); -struct btrfs_free_space *btrfs_find_free_space(struct btrfs_block_group_cache - *block_group, u64 offset, - u64 bytes); -void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group, - u64 bytes); -u64 btrfs_block_group_free_space(struct btrfs_block_group_cache *block_group); #endif |