Btrfs: add initial tracepoint support for btrfs

Tracepoints can provide insight into why btrfs hits bugs and be greatly
helpful for debugging, e.g
              dd-7822  [000]  2121.641088: btrfs_inode_request: root = 5(FS_TREE), gen = 4, ino = 256, blocks = 8, disk_i_size = 0, last_trans = 8, logged_trans = 0
              dd-7822  [000]  2121.641100: btrfs_inode_new: root = 5(FS_TREE), gen = 8, ino = 257, blocks = 0, disk_i_size = 0, last_trans = 0, logged_trans = 0
 btrfs-transacti-7804  [001]  2146.935420: btrfs_cow_block: root = 2(EXTENT_TREE), refs = 2, orig_buf = 29368320 (orig_level = 0), cow_buf = 29388800 (cow_level = 0)
 btrfs-transacti-7804  [001]  2146.935473: btrfs_cow_block: root = 1(ROOT_TREE), refs = 2, orig_buf = 29364224 (orig_level = 0), cow_buf = 29392896 (cow_level = 0)
 btrfs-transacti-7804  [001]  2146.972221: btrfs_transaction_commit: root = 1(ROOT_TREE), gen = 8
   flush-btrfs-2-7821  [001]  2155.824210: btrfs_chunk_alloc: root = 3(CHUNK_TREE), offset = 1103101952, size = 1073741824, num_stripes = 1, sub_stripes = 0, type = DATA
   flush-btrfs-2-7821  [001]  2155.824241: btrfs_cow_block: root = 2(EXTENT_TREE), refs = 2, orig_buf = 29388800 (orig_level = 0), cow_buf = 29396992 (cow_level = 0)
   flush-btrfs-2-7821  [001]  2155.824255: btrfs_cow_block: root = 4(DEV_TREE), refs = 2, orig_buf = 29372416 (orig_level = 0), cow_buf = 29401088 (cow_level = 0)
   flush-btrfs-2-7821  [000]  2155.824329: btrfs_cow_block: root = 3(CHUNK_TREE), refs = 2, orig_buf = 20971520 (orig_level = 0), cow_buf = 20975616 (cow_level = 0)
 btrfs-endio-wri-7800  [001]  2155.898019: btrfs_cow_block: root = 5(FS_TREE), refs = 2, orig_buf = 29384704 (orig_level = 0), cow_buf = 29405184 (cow_level = 0)
 btrfs-endio-wri-7800  [001]  2155.898043: btrfs_cow_block: root = 7(CSUM_TREE), refs = 2, orig_buf = 29376512 (orig_level = 0), cow_buf = 29409280 (cow_level = 0)

Here is what I have added:

1) ordere_extent:
        btrfs_ordered_extent_add
        btrfs_ordered_extent_remove
        btrfs_ordered_extent_start
        btrfs_ordered_extent_put

These provide critical information to understand how ordered_extents are
updated.

2) extent_map:
        btrfs_get_extent

extent_map is used in both read and write cases, and it is useful for tracking
how btrfs specific IO is running.

3) writepage:
        __extent_writepage
        btrfs_writepage_end_io_hook

Pages are cirtical resourses and produce a lot of corner cases during writeback,
so it is valuable to know how page is written to disk.

4) inode:
        btrfs_inode_new
        btrfs_inode_request
        btrfs_inode_evict

These can show where and when a inode is created, when a inode is evicted.

5) sync:
        btrfs_sync_file
        btrfs_sync_fs

These show sync arguments.

6) transaction:
        btrfs_transaction_commit

In transaction based filesystem, it will be useful to know the generation and
who does commit.

7) back reference and cow:
	btrfs_delayed_tree_ref
	btrfs_delayed_data_ref
	btrfs_delayed_ref_head
	btrfs_cow_block

Btrfs natively supports back references, these tracepoints are helpful on
understanding btrfs's COW mechanism.

8) chunk:
	btrfs_chunk_alloc
	btrfs_chunk_free

Chunk is a link between physical offset and logical offset, and stands for space
infomation in btrfs, and these are helpful on tracing space things.

9) reserved_extent:
	btrfs_reserved_extent_alloc
	btrfs_reserved_extent_free

These can show how btrfs uses its space.

Signed-off-by: Liu Bo <liubo2009@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>

diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 8680110..465b5d7 100644 (file)
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -535,6 +535,9 @@ noinline int btrfs_cow_block(struct btrfs_trans_handle *trans,
 
        ret = __btrfs_cow_block(trans, root, buf, parent,
                                 parent_slot, cow_ret, search_start, 0);
+
+       trace_btrfs_cow_block(root, buf, *cow_ret);
+
        return ret;
 }
 

diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 0ee679b..9d0f591 100644 (file)
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -28,6 +28,7 @@
 #include <linux/wait.h>
 #include <linux/slab.h>
 #include <linux/kobject.h>
+#include <trace/events/btrfs.h>
 #include <asm/kmap_types.h>
 #include "extent_io.h"
 #include "extent_map.h"

diff --git a/fs/btrfs/delayed-ref.c b/fs/btrfs/delayed-ref.c
index e807b14..bce28f6 100644 (file)
--- a/fs/btrfs/delayed-ref.c
+++ b/fs/btrfs/delayed-ref.c
@@ -483,6 +483,8 @@ static noinline int add_delayed_ref_head(struct btrfs_trans_handle *trans,
        INIT_LIST_HEAD(&head_ref->cluster);
        mutex_init(&head_ref->mutex);
 
+       trace_btrfs_delayed_ref_head(ref, head_ref, action);
+
        existing = tree_insert(&delayed_refs->root, &ref->rb_node);
 
        if (existing) {
@@ -537,6 +539,8 @@ static noinline int add_delayed_tree_ref(struct btrfs_trans_handle *trans,
        }
        full_ref->level = level;
 
+       trace_btrfs_delayed_tree_ref(ref, full_ref, action);
+
        existing = tree_insert(&delayed_refs->root, &ref->rb_node);
 
        if (existing) {
@@ -591,6 +595,8 @@ static noinline int add_delayed_data_ref(struct btrfs_trans_handle *trans,
        full_ref->objectid = owner;
        full_ref->offset = offset;
 
+       trace_btrfs_delayed_data_ref(ref, full_ref, action);
+
        existing = tree_insert(&delayed_refs->root, &ref->rb_node);
 
        if (existing) {

diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index cd794c3..86ea471 100644 (file)
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -5412,6 +5412,8 @@ again:
                dump_space_info(sinfo, num_bytes, 1);
        }
 
+       trace_btrfs_reserved_extent_alloc(root, ins->objectid, ins->offset);
+
        return ret;
 }
 
@@ -5433,6 +5435,8 @@ int btrfs_free_reserved_extent(struct btrfs_root *root, u64 start, u64 len)
        update_reserved_bytes(cache, len, 0, 1);
        btrfs_put_block_group(cache);
 
+       trace_btrfs_reserved_extent_free(root, start, len);
+
        return ret;
 }
 

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 1bbd26b..77c65a0 100644 (file)
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -2192,6 +2192,8 @@ static int __extent_writepage(struct page *page, struct writeback_control *wbc,
        else
                write_flags = WRITE;
 
+       trace___extent_writepage(page, inode, wbc);
+
        WARN_ON(!PageLocked(page));
        pg_offset = i_size & (PAGE_CACHE_SIZE - 1);
        if (page->index > end_index ||

diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index a85b044..656bc0a 100644 (file)
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -1205,6 +1205,7 @@ int btrfs_sync_file(struct file *file, int datasync)
        int ret = 0;
        struct btrfs_trans_handle *trans;
 
+       trace_btrfs_sync_file(file, datasync);
 
        /* we wait first, since the writeback may change the inode */
        root->log_batch++;

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index e9813bd..eaa2714 100644 (file)
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -1787,6 +1787,8 @@ out:
 static int btrfs_writepage_end_io_hook(struct page *page, u64 start, u64 end,
                                struct extent_state *state, int uptodate)
 {
+       trace_btrfs_writepage_end_io_hook(page, start, end, uptodate);
+
        ClearPagePrivate2(page);
        return btrfs_finish_ordered_io(page->mapping->host, start, end);
 }
@@ -3718,6 +3720,8 @@ void btrfs_evict_inode(struct inode *inode)
        unsigned long nr;
        int ret;
 
+       trace_btrfs_inode_evict(inode);
+
        truncate_inode_pages(&inode->i_data, 0);
        if (inode->i_nlink && (btrfs_root_refs(&root->root_item) != 0 ||
                               root == root->fs_info->tree_root))
@@ -4510,6 +4514,8 @@ static struct inode *btrfs_new_inode(struct btrfs_trans_handle *trans,
                return ERR_PTR(-ENOMEM);
 
        if (dir) {
+               trace_btrfs_inode_request(dir);
+
                ret = btrfs_set_inode_index(dir, index);
                if (ret) {
                        iput(inode);
@@ -4584,6 +4590,9 @@ static struct inode *btrfs_new_inode(struct btrfs_trans_handle *trans,
 
        insert_inode_hash(inode);
        inode_tree_add(inode);
+
+       trace_btrfs_inode_new(inode);
+
        return inode;
 fail:
        if (dir)
@@ -5261,6 +5270,9 @@ insert:
        }
        write_unlock(&em_tree->lock);
 out:
+
+       trace_btrfs_get_extent(root, em);
+
        if (path)
                btrfs_free_path(path);
        if (trans) {

diff --git a/fs/btrfs/ordered-data.c b/fs/btrfs/ordered-data.c
index 083a554..a1c9404 100644 (file)
--- a/fs/btrfs/ordered-data.c
+++ b/fs/btrfs/ordered-data.c
@@ -202,6 +202,8 @@ static int __btrfs_add_ordered_extent(struct inode *inode, u64 file_offset,
        INIT_LIST_HEAD(&entry->list);
        INIT_LIST_HEAD(&entry->root_extent_list);
 
+       trace_btrfs_ordered_extent_add(inode, entry);
+
        spin_lock(&tree->lock);
        node = tree_insert(&tree->tree, file_offset,
                           &entry->rb_node);
@@ -387,6 +389,8 @@ int btrfs_put_ordered_extent(struct btrfs_ordered_extent *entry)
        struct list_head *cur;
        struct btrfs_ordered_sum *sum;
 
+       trace_btrfs_ordered_extent_put(entry->inode, entry);
+
        if (atomic_dec_and_test(&entry->refs)) {
                while (!list_empty(&entry->list)) {
                        cur = entry->list.next;
@@ -420,6 +424,8 @@ static int __btrfs_remove_ordered_extent(struct inode *inode,
        spin_lock(&root->fs_info->ordered_extent_lock);
        list_del_init(&entry->root_extent_list);
 
+       trace_btrfs_ordered_extent_remove(inode, entry);
+
        /*
         * we have no more ordered extents for this inode and
         * no dirty pages.  We can safely remove it from the
@@ -585,6 +591,8 @@ void btrfs_start_ordered_extent(struct inode *inode,
        u64 start = entry->file_offset;
        u64 end = start + entry->len - 1;
 
+       trace_btrfs_ordered_extent_start(inode, entry);
+
        /*
         * pages in the range can be dirty, clean or writeback.  We
         * start IO on any dirty ones so the wait doesn't stall waiting

diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index d39a989..2edfc03 100644 (file)
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -52,6 +52,9 @@
 #include "export.h"
 #include "compression.h"
 
+#define CREATE_TRACE_POINTS
+#include <trace/events/btrfs.h>
+
 static const struct super_operations btrfs_super_ops;
 
 static const char *btrfs_decode_error(struct btrfs_fs_info *fs_info, int errno,
@@ -620,6 +623,8 @@ int btrfs_sync_fs(struct super_block *sb, int wait)
        struct btrfs_root *root = btrfs_sb(sb);
        int ret;
 
+       trace_btrfs_sync_fs(wait);
+
        if (!wait) {
                filemap_flush(root->fs_info->btree_inode->i_mapping);
                return 0;

diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index 3d73c8d..5b4bc68 100644 (file)
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -1389,6 +1389,8 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
        put_transaction(cur_trans);
        put_transaction(cur_trans);
 
+       trace_btrfs_transaction_commit(root);
+
        mutex_unlock(&root->fs_info->trans_mutex);
 
        if (current->journal_info == trans)

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index dd13eb8..8ba3c9e 100644 (file)
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -33,17 +33,6 @@
 #include "volumes.h"
 #include "async-thread.h"
 
-struct map_lookup {
-       u64 type;
-       int io_align;
-       int io_width;
-       int stripe_len;
-       int sector_size;
-       int num_stripes;
-       int sub_stripes;
-       struct btrfs_bio_stripe stripes[];
-};
-
 static int init_first_rw_device(struct btrfs_trans_handle *trans,
                                struct btrfs_root *root,
                                struct btrfs_device *device);
@@ -1923,6 +1912,8 @@ static int btrfs_relocate_chunk(struct btrfs_root *root,
 
        BUG_ON(ret);
 
+       trace_btrfs_chunk_free(root, map, chunk_offset, em->len);
+
        if (map->type & BTRFS_BLOCK_GROUP_SYSTEM) {
                ret = btrfs_del_sys_chunk(root, chunk_objectid, chunk_offset);
                BUG_ON(ret);
@@ -2650,6 +2641,8 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
        *num_bytes = chunk_bytes_by_type(type, calc_size,
                                         map->num_stripes, sub_stripes);
 
+       trace_btrfs_chunk_alloc(info->chunk_root, map, start, *num_bytes);
+
        em = alloc_extent_map(GFP_NOFS);
        if (!em) {
                ret = -ENOMEM;
@@ -2758,6 +2751,7 @@ static int __finish_chunk_alloc(struct btrfs_trans_handle *trans,
                                             item_size);
                BUG_ON(ret);
        }
+
        kfree(chunk);
        return 0;
 }

diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index 7fb59d4..7b38d06 100644 (file)
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -145,6 +145,17 @@ struct btrfs_device_info {
        u64 max_avail;
 };
 
+struct map_lookup {
+       u64 type;
+       int io_align;
+       int io_width;
+       int stripe_len;
+       int sector_size;
+       int num_stripes;
+       int sub_stripes;
+       struct btrfs_bio_stripe stripes[];
+};
+
 /* Used to sort the devices by max_avail(descending sort) */
 int btrfs_cmp_device_free_bytes(const void *dev_info1, const void *dev_info2);
 

diff --git a/include/trace/events/btrfs.h b/include/trace/events/btrfs.h
new file mode 100644 (file)
index 0000000..f445cff
--- /dev/null
+++ b/include/trace/events/btrfs.h
@@ -0,0 +1,667 @@
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM btrfs
+
+#if !defined(_TRACE_BTRFS_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_BTRFS_H
+
+#include <linux/writeback.h>
+#include <linux/tracepoint.h>
+
+struct btrfs_root;
+struct btrfs_fs_info;
+struct btrfs_inode;
+struct extent_map;
+struct btrfs_ordered_extent;
+struct btrfs_delayed_ref_node;
+struct btrfs_delayed_tree_ref;
+struct btrfs_delayed_data_ref;
+struct btrfs_delayed_ref_head;
+struct map_lookup;
+struct extent_buffer;
+
+#define show_ref_type(type)                                            \
+       __print_symbolic(type,                                          \
+               { BTRFS_TREE_BLOCK_REF_KEY,     "TREE_BLOCK_REF" },     \
+               { BTRFS_EXTENT_DATA_REF_KEY,    "EXTENT_DATA_REF" },    \
+               { BTRFS_EXTENT_REF_V0_KEY,      "EXTENT_REF_V0" },      \
+               { BTRFS_SHARED_BLOCK_REF_KEY,   "SHARED_BLOCK_REF" },   \
+               { BTRFS_SHARED_DATA_REF_KEY,    "SHARED_DATA_REF" })
+
+#define __show_root_type(obj)                                          \
+       __print_symbolic(obj,                                           \
+               { BTRFS_ROOT_TREE_OBJECTID,     "ROOT_TREE"     },      \
+               { BTRFS_EXTENT_TREE_OBJECTID,   "EXTENT_TREE"   },      \
+               { BTRFS_CHUNK_TREE_OBJECTID,    "CHUNK_TREE"    },      \
+               { BTRFS_DEV_TREE_OBJECTID,      "DEV_TREE"      },      \
+               { BTRFS_FS_TREE_OBJECTID,       "FS_TREE"       },      \
+               { BTRFS_ROOT_TREE_DIR_OBJECTID, "ROOT_TREE_DIR" },      \
+               { BTRFS_CSUM_TREE_OBJECTID,     "CSUM_TREE"     },      \
+               { BTRFS_TREE_LOG_OBJECTID,      "TREE_LOG"      },      \
+               { BTRFS_TREE_RELOC_OBJECTID,    "TREE_RELOC"    },      \
+               { BTRFS_DATA_RELOC_TREE_OBJECTID, "DATA_RELOC_TREE" })
+
+#define show_root_type(obj)                                            \
+       obj, ((obj >= BTRFS_DATA_RELOC_TREE_OBJECTID) ||                \
+             (obj <= BTRFS_CSUM_TREE_OBJECTID )) ? __show_root_type(obj) : "-"
+
+TRACE_EVENT(btrfs_transaction_commit,
+
+       TP_PROTO(struct btrfs_root *root),
+
+       TP_ARGS(root),
+
+       TP_STRUCT__entry(
+               __field(        u64,  generation                )
+               __field(        u64,  root_objectid             )
+       ),
+
+       TP_fast_assign(
+               __entry->generation     = root->fs_info->generation;
+               __entry->root_objectid  = root->root_key.objectid;
+       ),
+
+       TP_printk("root = %llu(%s), gen = %llu",
+                 show_root_type(__entry->root_objectid),
+                 (unsigned long long)__entry->generation)
+);
+
+DECLARE_EVENT_CLASS(btrfs__inode,
+
+       TP_PROTO(struct inode *inode),
+
+       TP_ARGS(inode),
+
+       TP_STRUCT__entry(
+               __field(        ino_t,  ino                     )
+               __field(        blkcnt_t,  blocks               )
+               __field(        u64,  disk_i_size               )
+               __field(        u64,  generation                )
+               __field(        u64,  last_trans                )
+               __field(        u64,  logged_trans              )
+               __field(        u64,  root_objectid             )
+       ),
+
+       TP_fast_assign(
+               __entry->ino    = inode->i_ino;
+               __entry->blocks = inode->i_blocks;
+               __entry->disk_i_size  = BTRFS_I(inode)->disk_i_size;
+               __entry->generation = BTRFS_I(inode)->generation;
+               __entry->last_trans = BTRFS_I(inode)->last_trans;
+               __entry->logged_trans = BTRFS_I(inode)->logged_trans;
+               __entry->root_objectid =
+                               BTRFS_I(inode)->root->root_key.objectid;
+       ),
+
+       TP_printk("root = %llu(%s), gen = %llu, ino = %lu, blocks = %llu, "
+                 "disk_i_size = %llu, last_trans = %llu, logged_trans = %llu",
+                 show_root_type(__entry->root_objectid),
+                 (unsigned long long)__entry->generation,
+                 (unsigned long)__entry->ino,
+                 (unsigned long long)__entry->blocks,
+                 (unsigned long long)__entry->disk_i_size,
+                 (unsigned long long)__entry->last_trans,
+                 (unsigned long long)__entry->logged_trans)
+);
+
+DEFINE_EVENT(btrfs__inode, btrfs_inode_new,
+
+       TP_PROTO(struct inode *inode),
+
+       TP_ARGS(inode)
+);
+
+DEFINE_EVENT(btrfs__inode, btrfs_inode_request,
+
+       TP_PROTO(struct inode *inode),
+
+       TP_ARGS(inode)
+);
+
+DEFINE_EVENT(btrfs__inode, btrfs_inode_evict,
+
+       TP_PROTO(struct inode *inode),
+
+       TP_ARGS(inode)
+);
+
+#define __show_map_type(type)                                          \
+       __print_symbolic(type,                                          \
+               { EXTENT_MAP_LAST_BYTE, "LAST_BYTE"     },              \
+               { EXTENT_MAP_HOLE,      "HOLE"          },              \
+               { EXTENT_MAP_INLINE,    "INLINE"        },              \
+               { EXTENT_MAP_DELALLOC,  "DELALLOC"      })
+
+#define show_map_type(type)                    \
+       type, (type >= EXTENT_MAP_LAST_BYTE) ? "-" :  __show_map_type(type)
+
+#define show_map_flags(flag)                                           \
+       __print_flags(flag, "|",                                        \
+               { EXTENT_FLAG_PINNED,           "PINNED"        },      \
+               { EXTENT_FLAG_COMPRESSED,       "COMPRESSED"    },      \
+               { EXTENT_FLAG_VACANCY,          "VACANCY"       },      \
+               { EXTENT_FLAG_PREALLOC,         "PREALLOC"      })
+
+TRACE_EVENT(btrfs_get_extent,
+
+       TP_PROTO(struct btrfs_root *root, struct extent_map *map),
+
+       TP_ARGS(root, map),
+
+       TP_STRUCT__entry(
+               __field(        u64,  root_objectid     )
+               __field(        u64,  start             )
+               __field(        u64,  len               )
+               __field(        u64,  orig_start        )
+               __field(        u64,  block_start       )
+               __field(        u64,  block_len         )
+               __field(        unsigned long,  flags   )
+               __field(        int,  refs              )
+               __field(        unsigned int,  compress_type    )
+       ),
+
+       TP_fast_assign(
+               __entry->root_objectid  = root->root_key.objectid;
+               __entry->start          = map->start;
+               __entry->len            = map->len;
+               __entry->orig_start     = map->orig_start;
+               __entry->block_start    = map->block_start;
+               __entry->block_len      = map->block_len;
+               __entry->flags          = map->flags;
+               __entry->refs           = atomic_read(&map->refs);
+               __entry->compress_type  = map->compress_type;
+       ),
+
+       TP_printk("root = %llu(%s), start = %llu, len = %llu, "
+                 "orig_start = %llu, block_start = %llu(%s), "
+                 "block_len = %llu, flags = %s, refs = %u, "
+                 "compress_type = %u",
+                 show_root_type(__entry->root_objectid),
+                 (unsigned long long)__entry->start,
+                 (unsigned long long)__entry->len,
+                 (unsigned long long)__entry->orig_start,
+                 show_map_type(__entry->block_start),
+                 (unsigned long long)__entry->block_len,
+                 show_map_flags(__entry->flags),
+                 __entry->refs, __entry->compress_type)
+);
+
+#define show_ordered_flags(flags)                                      \
+       __print_symbolic(flags,                                 \
+               { BTRFS_ORDERED_IO_DONE,        "IO_DONE"       },      \
+               { BTRFS_ORDERED_COMPLETE,       "COMPLETE"      },      \
+               { BTRFS_ORDERED_NOCOW,          "NOCOW"         },      \
+               { BTRFS_ORDERED_COMPRESSED,     "COMPRESSED"    },      \
+               { BTRFS_ORDERED_PREALLOC,       "PREALLOC"      },      \
+               { BTRFS_ORDERED_DIRECT,         "DIRECT"        })
+
+DECLARE_EVENT_CLASS(btrfs__ordered_extent,
+
+       TP_PROTO(struct inode *inode, struct btrfs_ordered_extent *ordered),
+
+       TP_ARGS(inode, ordered),
+
+       TP_STRUCT__entry(
+               __field(        ino_t,  ino             )
+               __field(        u64,  file_offset       )
+               __field(        u64,  start             )
+               __field(        u64,  len               )
+               __field(        u64,  disk_len          )
+               __field(        u64,  bytes_left        )
+               __field(        unsigned long,  flags   )
+               __field(        int,  compress_type     )
+               __field(        int,  refs              )
+               __field(        u64,  root_objectid     )
+       ),
+
+       TP_fast_assign(
+               __entry->ino            = inode->i_ino;
+               __entry->file_offset    = ordered->file_offset;
+               __entry->start          = ordered->start;
+               __entry->len            = ordered->len;
+               __entry->disk_len       = ordered->disk_len;
+               __entry->bytes_left     = ordered->bytes_left;
+               __entry->flags          = ordered->flags;
+               __entry->compress_type  = ordered->compress_type;
+               __entry->refs           = atomic_read(&ordered->refs);
+               __entry->root_objectid  =
+                               BTRFS_I(inode)->root->root_key.objectid;
+       ),
+
+       TP_printk("root = %llu(%s), ino = %llu, file_offset = %llu, "
+                 "start = %llu, len = %llu, disk_len = %llu, "
+                 "bytes_left = %llu, flags = %s, compress_type = %d, "
+                 "refs = %d",
+                 show_root_type(__entry->root_objectid),
+                 (unsigned long long)__entry->ino,
+                 (unsigned long long)__entry->file_offset,
+                 (unsigned long long)__entry->start,
+                 (unsigned long long)__entry->len,
+                 (unsigned long long)__entry->disk_len,
+                 (unsigned long long)__entry->bytes_left,
+                 show_ordered_flags(__entry->flags),
+                 __entry->compress_type, __entry->refs)
+);
+
+DEFINE_EVENT(btrfs__ordered_extent, btrfs_ordered_extent_add,
+
+       TP_PROTO(struct inode *inode, struct btrfs_ordered_extent *ordered),
+
+       TP_ARGS(inode, ordered)
+);
+
+DEFINE_EVENT(btrfs__ordered_extent, btrfs_ordered_extent_remove,
+
+       TP_PROTO(struct inode *inode, struct btrfs_ordered_extent *ordered),
+
+       TP_ARGS(inode, ordered)
+);
+
+DEFINE_EVENT(btrfs__ordered_extent, btrfs_ordered_extent_start,
+
+       TP_PROTO(struct inode *inode, struct btrfs_ordered_extent *ordered),
+
+       TP_ARGS(inode, ordered)
+);
+
+DEFINE_EVENT(btrfs__ordered_extent, btrfs_ordered_extent_put,
+
+       TP_PROTO(struct inode *inode, struct btrfs_ordered_extent *ordered),
+
+       TP_ARGS(inode, ordered)
+);
+
+DECLARE_EVENT_CLASS(btrfs__writepage,
+
+       TP_PROTO(struct page *page, struct inode *inode,
+                struct writeback_control *wbc),
+
+       TP_ARGS(page, inode, wbc),
+
+       TP_STRUCT__entry(
+               __field(        ino_t,  ino                     )
+               __field(        pgoff_t,  index                 )
+               __field(        long,   nr_to_write             )
+               __field(        long,   pages_skipped           )
+               __field(        loff_t, range_start             )
+               __field(        loff_t, range_end               )
+               __field(        char,   nonblocking             )
+               __field(        char,   for_kupdate             )
+               __field(        char,   for_reclaim             )
+               __field(        char,   range_cyclic            )
+               __field(        pgoff_t,  writeback_index       )
+               __field(        u64,    root_objectid           )
+       ),
+
+       TP_fast_assign(
+               __entry->ino            = inode->i_ino;
+               __entry->index          = page->index;
+               __entry->nr_to_write    = wbc->nr_to_write;
+               __entry->pages_skipped  = wbc->pages_skipped;
+               __entry->range_start    = wbc->range_start;
+               __entry->range_end      = wbc->range_end;
+               __entry->nonblocking    = wbc->nonblocking;
+               __entry->for_kupdate    = wbc->for_kupdate;
+               __entry->for_reclaim    = wbc->for_reclaim;
+               __entry->range_cyclic   = wbc->range_cyclic;
+               __entry->writeback_index = inode->i_mapping->writeback_index;
+               __entry->root_objectid  =
+                                BTRFS_I(inode)->root->root_key.objectid;
+       ),
+
+       TP_printk("root = %llu(%s), ino = %lu, page_index = %lu, "
+                 "nr_to_write = %ld, pages_skipped = %ld, range_start = %llu, "
+                 "range_end = %llu, nonblocking = %d, for_kupdate = %d, "
+                 "for_reclaim = %d, range_cyclic = %d, writeback_index = %lu",
+                 show_root_type(__entry->root_objectid),
+                 (unsigned long)__entry->ino, __entry->index,
+                 __entry->nr_to_write, __entry->pages_skipped,
+                 __entry->range_start, __entry->range_end,
+                 __entry->nonblocking, __entry->for_kupdate,
+                 __entry->for_reclaim, __entry->range_cyclic,
+                 (unsigned long)__entry->writeback_index)
+);
+
+DEFINE_EVENT(btrfs__writepage, __extent_writepage,
+
+       TP_PROTO(struct page *page, struct inode *inode,
+                struct writeback_control *wbc),
+
+       TP_ARGS(page, inode, wbc)
+);
+
+TRACE_EVENT(btrfs_writepage_end_io_hook,
+
+       TP_PROTO(struct page *page, u64 start, u64 end, int uptodate),
+
+       TP_ARGS(page, start, end, uptodate),
+
+       TP_STRUCT__entry(
+               __field(        ino_t,   ino            )
+               __field(        pgoff_t, index          )
+               __field(        u64,     start          )
+               __field(        u64,     end            )
+               __field(        int,     uptodate       )
+               __field(        u64,    root_objectid   )
+       ),
+
+       TP_fast_assign(
+               __entry->ino    = page->mapping->host->i_ino;
+               __entry->index  = page->index;
+               __entry->start  = start;
+               __entry->end    = end;
+               __entry->uptodate = uptodate;
+               __entry->root_objectid  =
+                        BTRFS_I(page->mapping->host)->root->root_key.objectid;
+       ),
+
+       TP_printk("root = %llu(%s), ino = %lu, page_index = %lu, start = %llu, "
+                 "end = %llu, uptodate = %d",
+                 show_root_type(__entry->root_objectid),
+                 (unsigned long)__entry->ino, (unsigned long)__entry->index,
+                 (unsigned long long)__entry->start,
+                 (unsigned long long)__entry->end, __entry->uptodate)
+);
+
+TRACE_EVENT(btrfs_sync_file,
+
+       TP_PROTO(struct file *file, int datasync),
+
+       TP_ARGS(file, datasync),
+
+       TP_STRUCT__entry(
+               __field(        ino_t,  ino             )
+               __field(        ino_t,  parent          )
+               __field(        int,    datasync        )
+               __field(        u64,    root_objectid   )
+       ),
+
+       TP_fast_assign(
+               struct dentry *dentry = file->f_path.dentry;
+               struct inode *inode = dentry->d_inode;
+
+               __entry->ino            = inode->i_ino;
+               __entry->parent         = dentry->d_parent->d_inode->i_ino;
+               __entry->datasync       = datasync;
+               __entry->root_objectid  =
+                                BTRFS_I(inode)->root->root_key.objectid;
+       ),
+
+       TP_printk("root = %llu(%s), ino = %ld, parent = %ld, datasync = %d",
+                 show_root_type(__entry->root_objectid),
+                 (unsigned long)__entry->ino, (unsigned long)__entry->parent,
+                 __entry->datasync)
+);
+
+TRACE_EVENT(btrfs_sync_fs,
+
+       TP_PROTO(int wait),
+
+       TP_ARGS(wait),
+
+       TP_STRUCT__entry(
+               __field(        int,  wait              )
+       ),
+
+       TP_fast_assign(
+               __entry->wait   = wait;
+       ),
+
+       TP_printk("wait = %d", __entry->wait)
+);
+
+#define show_ref_action(action)                                                \
+       __print_symbolic(action,                                        \
+               { BTRFS_ADD_DELAYED_REF,    "ADD_DELAYED_REF" },        \
+               { BTRFS_DROP_DELAYED_REF,   "DROP_DELAYED_REF" },       \
+               { BTRFS_ADD_DELAYED_EXTENT, "ADD_DELAYED_EXTENT" },     \
+               { BTRFS_UPDATE_DELAYED_HEAD, "UPDATE_DELAYED_HEAD" })
+                       
+
+TRACE_EVENT(btrfs_delayed_tree_ref,
+
+       TP_PROTO(struct btrfs_delayed_ref_node *ref,
+                struct btrfs_delayed_tree_ref *full_ref,
+                int action),
+
+       TP_ARGS(ref, full_ref, action),
+
+       TP_STRUCT__entry(
+               __field(        u64,  bytenr            )
+               __field(        u64,  num_bytes         )
+               __field(        int,  action            ) 
+               __field(        u64,  parent            )
+               __field(        u64,  ref_root          )
+               __field(        int,  level             )
+               __field(        int,  type              )
+       ),
+
+       TP_fast_assign(
+               __entry->bytenr         = ref->bytenr;
+               __entry->num_bytes      = ref->num_bytes;
+               __entry->action         = action;
+               __entry->parent         = full_ref->parent;
+               __entry->ref_root       = full_ref->root;
+               __entry->level          = full_ref->level;
+               __entry->type           = ref->type;
+       ),
+
+       TP_printk("bytenr = %llu, num_bytes = %llu, action = %s, "
+                 "parent = %llu(%s), ref_root = %llu(%s), level = %d, "
+                 "type = %s",
+                 (unsigned long long)__entry->bytenr,
+                 (unsigned long long)__entry->num_bytes,
+                 show_ref_action(__entry->action),
+                 show_root_type(__entry->parent),
+                 show_root_type(__entry->ref_root),
+                 __entry->level, show_ref_type(__entry->type))
+);
+
+TRACE_EVENT(btrfs_delayed_data_ref,
+
+       TP_PROTO(struct btrfs_delayed_ref_node *ref,
+                struct btrfs_delayed_data_ref *full_ref,
+                int action),
+
+       TP_ARGS(ref, full_ref, action),
+
+       TP_STRUCT__entry(
+               __field(        u64,  bytenr            )
+               __field(        u64,  num_bytes         )
+               __field(        int,  action            ) 
+               __field(        u64,  parent            )
+               __field(        u64,  ref_root          )
+               __field(        u64,  owner             )
+               __field(        u64,  offset            )
+               __field(        int,  type              )
+       ),
+
+       TP_fast_assign(
+               __entry->bytenr         = ref->bytenr;
+               __entry->num_bytes      = ref->num_bytes;
+               __entry->action         = action;
+               __entry->parent         = full_ref->parent;
+               __entry->ref_root       = full_ref->root;
+               __entry->owner          = full_ref->objectid;
+               __entry->offset         = full_ref->offset;
+               __entry->type           = ref->type;
+       ),
+
+       TP_printk("bytenr = %llu, num_bytes = %llu, action = %s, "
+                 "parent = %llu(%s), ref_root = %llu(%s), owner = %llu, "
+                 "offset = %llu, type = %s",
+                 (unsigned long long)__entry->bytenr,
+                 (unsigned long long)__entry->num_bytes,
+                 show_ref_action(__entry->action),
+                 show_root_type(__entry->parent),
+                 show_root_type(__entry->ref_root),
+                 (unsigned long long)__entry->owner,
+                 (unsigned long long)__entry->offset,
+                 show_ref_type(__entry->type))
+);
+
+TRACE_EVENT(btrfs_delayed_ref_head,
+
+       TP_PROTO(struct btrfs_delayed_ref_node *ref,
+                struct btrfs_delayed_ref_head *head_ref,
+                int action),
+
+       TP_ARGS(ref, head_ref, action),
+
+       TP_STRUCT__entry(
+               __field(        u64,  bytenr            )
+               __field(        u64,  num_bytes         )
+               __field(        int,  action            ) 
+               __field(        int,  is_data           )
+       ),
+
+       TP_fast_assign(
+               __entry->bytenr         = ref->bytenr;
+               __entry->num_bytes      = ref->num_bytes;
+               __entry->action         = action;
+               __entry->is_data        = head_ref->is_data;
+       ),
+
+       TP_printk("bytenr = %llu, num_bytes = %llu, action = %s, is_data = %d",
+                 (unsigned long long)__entry->bytenr,
+                 (unsigned long long)__entry->num_bytes,
+                 show_ref_action(__entry->action),
+                 __entry->is_data)
+);
+
+#define show_chunk_type(type)                                  \
+       __print_flags(type, "|",                                \
+               { BTRFS_BLOCK_GROUP_DATA,       "DATA"  },      \
+               { BTRFS_BLOCK_GROUP_SYSTEM,     "SYSTEM"},      \
+               { BTRFS_BLOCK_GROUP_METADATA,   "METADATA"},    \
+               { BTRFS_BLOCK_GROUP_RAID0,      "RAID0" },      \
+               { BTRFS_BLOCK_GROUP_RAID1,      "RAID1" },      \
+               { BTRFS_BLOCK_GROUP_DUP,        "DUP"   },      \
+               { BTRFS_BLOCK_GROUP_RAID10,     "RAID10"})
+
+DECLARE_EVENT_CLASS(btrfs__chunk,
+
+       TP_PROTO(struct btrfs_root *root, struct map_lookup *map,
+                u64 offset, u64 size),
+
+       TP_ARGS(root, map, offset, size),
+
+       TP_STRUCT__entry(
+               __field(        int,  num_stripes               )
+               __field(        u64,  type                      )
+               __field(        int,  sub_stripes               )
+               __field(        u64,  offset                    )
+               __field(        u64,  size                      )
+               __field(        u64,  root_objectid             )
+       ),
+
+       TP_fast_assign(
+               __entry->num_stripes    = map->num_stripes;
+               __entry->type           = map->type;
+               __entry->sub_stripes    = map->sub_stripes;
+               __entry->offset         = offset;
+               __entry->size           = size;
+               __entry->root_objectid  = root->root_key.objectid;
+       ),
+
+       TP_printk("root = %llu(%s), offset = %llu, size = %llu, "
+                 "num_stripes = %d, sub_stripes = %d, type = %s",
+                 show_root_type(__entry->root_objectid),
+                 (unsigned long long)__entry->offset,
+                 (unsigned long long)__entry->size,
+                 __entry->num_stripes, __entry->sub_stripes,
+                 show_chunk_type(__entry->type))
+);
+
+DEFINE_EVENT(btrfs__chunk,  btrfs_chunk_alloc,
+
+       TP_PROTO(struct btrfs_root *root, struct map_lookup *map,
+                u64 offset, u64 size),
+
+       TP_ARGS(root, map, offset, size)
+);
+
+DEFINE_EVENT(btrfs__chunk,  btrfs_chunk_free,
+
+       TP_PROTO(struct btrfs_root *root, struct map_lookup *map,
+                u64 offset, u64 size),
+
+       TP_ARGS(root, map, offset, size)
+);
+
+TRACE_EVENT(btrfs_cow_block,
+
+       TP_PROTO(struct btrfs_root *root, struct extent_buffer *buf,
+                struct extent_buffer *cow),
+
+       TP_ARGS(root, buf, cow),
+
+       TP_STRUCT__entry(
+               __field(        u64,  root_objectid             )
+               __field(        u64,  buf_start                 )
+               __field(        int,  refs                      )
+               __field(        u64,  cow_start                 )
+               __field(        int,  buf_level                 )
+               __field(        int,  cow_level                 )
+       ),
+
+       TP_fast_assign(
+               __entry->root_objectid  = root->root_key.objectid;
+               __entry->buf_start      = buf->start;
+               __entry->refs           = atomic_read(&buf->refs);
+               __entry->cow_start      = cow->start;
+               __entry->buf_level      = btrfs_header_level(buf);
+               __entry->cow_level      = btrfs_header_level(cow);
+       ),
+
+       TP_printk("root = %llu(%s), refs = %d, orig_buf = %llu "
+                 "(orig_level = %d), cow_buf = %llu (cow_level = %d)",
+                 show_root_type(__entry->root_objectid),
+                 __entry->refs,
+                 (unsigned long long)__entry->buf_start,
+                 __entry->buf_level,
+                 (unsigned long long)__entry->cow_start,
+                 __entry->cow_level)
+);
+
+DECLARE_EVENT_CLASS(btrfs__reserved_extent,
+
+       TP_PROTO(struct btrfs_root *root, u64 start, u64 len),
+
+       TP_ARGS(root, start, len),
+
+       TP_STRUCT__entry(
+               __field(        u64,  root_objectid             )
+               __field(        u64,  start                     )
+               __field(        u64,  len                       )
+       ),
+
+       TP_fast_assign(
+               __entry->root_objectid  = root->root_key.objectid;
+               __entry->start          = start;
+               __entry->len            = len;
+       ),
+
+       TP_printk("root = %llu(%s), start = %llu, len = %llu",
+                 show_root_type(__entry->root_objectid),
+                 (unsigned long long)__entry->start,
+                 (unsigned long long)__entry->len)
+);
+
+DEFINE_EVENT(btrfs__reserved_extent,  btrfs_reserved_extent_alloc,
+
+       TP_PROTO(struct btrfs_root *root, u64 start, u64 len),
+
+       TP_ARGS(root, start, len)
+);
+
+DEFINE_EVENT(btrfs__reserved_extent,  btrfs_reserved_extent_free,
+
+       TP_PROTO(struct btrfs_root *root, u64 start, u64 len),
+
+       TP_ARGS(root, start, len)
+);
+
+#endif /* _TRACE_BTRFS_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>