btrfs: Introduce fs_info to extent_io_tree

This patch will add a new member fs_info to extent_io_tree.

This provides the basis for later trace events to distinguish the output
between different btrfs filesystems. While this increases the size of
the structure, we want to know the source of the trace events and
passing the fs_info as an argument to all contexts is not possible.

The selftests are now allowed to set it to NULL as they don't use the
tracepoints.

Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

8 files changed, 20 insertions, 17 deletions

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index c4404e1e9cfb..26493c2fc237 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1211,7 +1211,7 @@ static void __setup_root(struct btrfs_root *root, struct btrfs_fs_info *fs_info,
         root->log_transid_committed = -1;
         root->last_log_commit = 0;
         if (!dummy)
-                extent_io_tree_init(&root->dirty_log_pages, NULL);
+                extent_io_tree_init(fs_info, &root->dirty_log_pages, NULL);
 
         memset(&root->root_key, 0, sizeof(root->root_key));
         memset(&root->root_item, 0, sizeof(root->root_item));
@@ -2141,7 +2141,7 @@ static void btrfs_init_btree_inode(struct btrfs_fs_info *fs_info)
         inode->i_mapping->a_ops = &btree_aops;
 
         RB_CLEAR_NODE(&BTRFS_I(inode)->rb_node);
-        extent_io_tree_init(&BTRFS_I(inode)->io_tree, inode);
+        extent_io_tree_init(fs_info, &BTRFS_I(inode)->io_tree, inode);
         BTRFS_I(inode)->io_tree.track_uptodate = 0;
         extent_map_tree_init(&BTRFS_I(inode)->extent_tree);
 
@@ -2751,8 +2751,8 @@ int open_ctree(struct super_block *sb,
         fs_info->block_group_cache_tree = RB_ROOT;
         fs_info->first_logical_byte = (u64)-1;
 
-        extent_io_tree_init(&fs_info->freed_extents[0], NULL);
-        extent_io_tree_init(&fs_info->freed_extents[1], NULL);
+        extent_io_tree_init(fs_info, &fs_info->freed_extents[0], NULL);
+        extent_io_tree_init(fs_info, &fs_info->freed_extents[1], NULL);
         fs_info->pinned_extents = &fs_info->freed_extents[0];
         set_bit(BTRFS_FS_BARRIER, &fs_info->flags);
 
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index ca8b8e785cf3..139f2fe3092f 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -232,9 +232,10 @@ void __cold extent_io_exit(void)
         bioset_exit(&btrfs_bioset);
 }
 
-void extent_io_tree_init(struct extent_io_tree *tree,
-                         void *private_data)
+void extent_io_tree_init(struct btrfs_fs_info *fs_info,
+                         struct extent_io_tree *tree, void *private_data)
 {
+        tree->fs_info = fs_info;
         tree->state = RB_ROOT;
         tree->ops = NULL;
         tree->dirty_bytes = 0;
diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h
index 08749e0b9c32..e63215d69299 100644
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@ -108,6 +108,7 @@ struct extent_io_ops {
 
 struct extent_io_tree {
         struct rb_root state;
+        struct btrfs_fs_info *fs_info;
         void *private_data;
         u64 dirty_bytes;
         int track_uptodate;
@@ -239,7 +240,8 @@ typedef struct extent_map *(get_extent_t)(struct btrfs_inode *inode,
                                           u64 start, u64 len,
                                           int create);
 
-void extent_io_tree_init(struct extent_io_tree *tree, void *private_data);
+void extent_io_tree_init(struct btrfs_fs_info *fs_info,
+                         struct extent_io_tree *tree, void *private_data);
 int try_release_extent_mapping(struct page *page, gfp_t mask);
 int try_release_extent_buffer(struct page *page);
 int lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index cef875a2c475..2436bc50f21d 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -9182,8 +9182,8 @@ struct inode *btrfs_alloc_inode(struct super_block *sb)
 
         inode = &ei->vfs_inode;
         extent_map_tree_init(&ei->extent_tree);
-        extent_io_tree_init(&ei->io_tree, inode);
-        extent_io_tree_init(&ei->io_failure_tree, inode);
+        extent_io_tree_init(fs_info, &ei->io_tree, inode);
+        extent_io_tree_init(fs_info, &ei->io_failure_tree, inode);
         ei->io_tree.track_uptodate = 1;
         ei->io_failure_tree.track_uptodate = 1;
         atomic_set(&ei->sync_writers, 0);
diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
index ddf028509931..955da7baa665 100644
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -4222,7 +4222,7 @@ out:
         return inode;
 }
 
-static struct reloc_control *alloc_reloc_control(void)
+static struct reloc_control *alloc_reloc_control(struct btrfs_fs_info *fs_info)
 {
         struct reloc_control *rc;
 
@@ -4234,7 +4234,7 @@ static struct reloc_control *alloc_reloc_control(void)
         INIT_LIST_HEAD(&rc->dirty_subvol_roots);
         backref_cache_init(&rc->backref_cache);
         mapping_tree_init(&rc->reloc_root_tree);
-        extent_io_tree_init(&rc->processed_blocks, NULL);
+        extent_io_tree_init(fs_info, &rc->processed_blocks, NULL);
         return rc;
 }
 
@@ -4276,7 +4276,7 @@ int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start)
                 return -ETXTBSY;
         }
 
-        rc = alloc_reloc_control();
+        rc = alloc_reloc_control(fs_info);
         if (!rc) {
                 btrfs_put_block_group(bg);
                 return -ENOMEM;
@@ -4472,7 +4472,7 @@ int btrfs_recover_relocation(struct btrfs_root *root)
         if (list_empty(&reloc_roots))
                 goto out;
 
-        rc = alloc_reloc_control();
+        rc = alloc_reloc_control(fs_info);
         if (!rc) {
                 err = -ENOMEM;
                 goto out;
diff --git a/fs/btrfs/tests/btrfs-tests.c b/fs/btrfs/tests/btrfs-tests.c
index 8a59597f1883..cc1e5d017dc0 100644
--- a/fs/btrfs/tests/btrfs-tests.c
+++ b/fs/btrfs/tests/btrfs-tests.c
@@ -115,8 +115,8 @@ struct btrfs_fs_info *btrfs_alloc_dummy_fs_info(u32 nodesize, u32 sectorsize)
         INIT_LIST_HEAD(&fs_info->tree_mod_seq_list);
         INIT_RADIX_TREE(&fs_info->buffer_radix, GFP_ATOMIC);
         INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC);
-        extent_io_tree_init(&fs_info->freed_extents[0], NULL);
-        extent_io_tree_init(&fs_info->freed_extents[1], NULL);
+        extent_io_tree_init(fs_info, &fs_info->freed_extents[0], NULL);
+        extent_io_tree_init(fs_info, &fs_info->freed_extents[1], NULL);
         fs_info->pinned_extents = &fs_info->freed_extents[0];
         set_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
 
diff --git a/fs/btrfs/tests/extent-io-tests.c b/fs/btrfs/tests/extent-io-tests.c
index 3c46d7f23456..6ac9770a974c 100644
--- a/fs/btrfs/tests/extent-io-tests.c
+++ b/fs/btrfs/tests/extent-io-tests.c
@@ -77,7 +77,7 @@ static int test_find_delalloc(u32 sectorsize)
                 return -ENOMEM;
         }
 
-        extent_io_tree_init(&tmp, NULL);
+        extent_io_tree_init(NULL, &tmp, NULL);
 
         /*
          * First go through and create and mark all of our pages dirty, we pin
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index e4e665f422fc..bc8ed44ad8c8 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -274,7 +274,7 @@ loop:
         INIT_LIST_HEAD(&cur_trans->deleted_bgs);
         spin_lock_init(&cur_trans->dropped_roots_lock);
         list_add_tail(&cur_trans->list, &fs_info->trans_list);
-        extent_io_tree_init(&cur_trans->dirty_pages,
+        extent_io_tree_init(fs_info, &cur_trans->dirty_pages,
                              fs_info->btree_inode);
         fs_info->generation++;
         cur_trans->transid = fs_info->generation;