Merge tag 'trace-v5.6-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt...

[linux.git] / fs / btrfs / free-space-cache.h

diff --git a/fs/btrfs/free-space-cache.h b/fs/btrfs/free-space-cache.h
index ba9a2324110180f99d3889e8e2274accd0ded097..2e0a8077aa747c9654dfa172d52a829bc27c10af 100644 (file)
--- a/fs/btrfs/free-space-cache.h
+++ b/fs/btrfs/free-space-cache.h
@@ -6,6 +6,20 @@
 #ifndef BTRFS_FREE_SPACE_CACHE_H
 #define BTRFS_FREE_SPACE_CACHE_H
 
+/*
+ * This is the trim state of an extent or bitmap.
+ *
+ * BTRFS_TRIM_STATE_TRIMMING is special and used to maintain the state of a
+ * bitmap as we may need several trims to fully trim a single bitmap entry.
+ * This is reset should any free space other than trimmed space be added to the
+ * bitmap.
+ */
+enum btrfs_trim_state {
+       BTRFS_TRIM_STATE_UNTRIMMED,
+       BTRFS_TRIM_STATE_TRIMMED,
+       BTRFS_TRIM_STATE_TRIMMING,
+};
+
 struct btrfs_free_space {
        struct rb_node offset_index;
        u64 offset;
@@ -13,8 +27,21 @@ struct btrfs_free_space {
        u64 max_extent_size;
        unsigned long *bitmap;
        struct list_head list;
+       enum btrfs_trim_state trim_state;
+       s32 bitmap_extents;
 };
 
+static inline bool btrfs_free_space_trimmed(struct btrfs_free_space *info)
+{
+       return (info->trim_state == BTRFS_TRIM_STATE_TRIMMED);
+}
+
+static inline bool btrfs_free_space_trimming_bitmap(
+                                           struct btrfs_free_space *info)
+{
+       return (info->trim_state == BTRFS_TRIM_STATE_TRIMMING);
+}
+
 struct btrfs_free_space_ctl {
        spinlock_t tree_lock;
        struct rb_root free_space_offset;
@@ -24,6 +51,8 @@ struct btrfs_free_space_ctl {
        int total_bitmaps;
        int unit;
        u64 start;
+       s32 discardable_extents[BTRFS_STAT_NR_ENTRIES];
+       s64 discardable_bytes[BTRFS_STAT_NR_ENTRIES];
        const struct btrfs_free_space_op *op;
        void *private;
        struct mutex cache_writeout_mutex;
@@ -83,13 +112,17 @@ int btrfs_write_out_ino_cache(struct btrfs_root *root,
 void btrfs_init_free_space_ctl(struct btrfs_block_group *block_group);
 int __btrfs_add_free_space(struct btrfs_fs_info *fs_info,
                           struct btrfs_free_space_ctl *ctl,
-                          u64 bytenr, u64 size);
+                          u64 bytenr, u64 size,
+                          enum btrfs_trim_state trim_state);
 int btrfs_add_free_space(struct btrfs_block_group *block_group,
                         u64 bytenr, u64 size);
+int btrfs_add_free_space_async_trimmed(struct btrfs_block_group *block_group,
+                                      u64 bytenr, u64 size);
 int btrfs_remove_free_space(struct btrfs_block_group *block_group,
                            u64 bytenr, u64 size);
 void __btrfs_remove_free_space_cache(struct btrfs_free_space_ctl *ctl);
 void btrfs_remove_free_space_cache(struct btrfs_block_group *block_group);
+bool btrfs_is_free_space_trimmed(struct btrfs_block_group *block_group);
 u64 btrfs_find_space_for_alloc(struct btrfs_block_group *block_group,
                               u64 offset, u64 bytes, u64 empty_size,
                               u64 *max_extent_size);
@@ -108,6 +141,12 @@ int btrfs_return_cluster_to_free_space(
                               struct btrfs_free_cluster *cluster);
 int btrfs_trim_block_group(struct btrfs_block_group *block_group,
                           u64 *trimmed, u64 start, u64 end, u64 minlen);
+int btrfs_trim_block_group_extents(struct btrfs_block_group *block_group,
+                                  u64 *trimmed, u64 start, u64 end, u64 minlen,
+                                  bool async);
+int btrfs_trim_block_group_bitmaps(struct btrfs_block_group *block_group,
+                                  u64 *trimmed, u64 start, u64 end, u64 minlen,
+                                  u64 maxlen, bool async);
 
 /* Support functions for running our sanity tests */
 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS