Commit 43eb5f29 authored by Qu Wenruo's avatar Qu Wenruo Committed by David Sterba
Browse files

btrfs: Introduce extent_io_tree::owner to distinguish different io_trees



Btrfs has the following different extent_io_trees used:

- fs_info::free_extents[2]
- btrfs_inode::io_tree - for both normal inodes and the btree inode
- btrfs_inode::io_failure_tree
- btrfs_transaction::dirty_pages
- btrfs_root::dirty_log_pages

If we want to trace changes in those trees, it will be pretty hard to
distinguish them.

Instead of using hard-to-read pointer address, this patch will introduce
a new member extent_io_tree::owner to track the owner.

This modification needs all the callers of extent_io_tree_init() to
accept a new parameter @owner.

This patch provides the basis for later trace events.

Signed-off-by: default avatarQu Wenruo <wqu@suse.com>
Reviewed-by: default avatarDavid Sterba <dsterba@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent 7b439738
......@@ -1211,7 +1211,8 @@ 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(fs_info, &root->dirty_log_pages, NULL);
extent_io_tree_init(fs_info, &root->dirty_log_pages,
IO_TREE_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 +2142,8 @@ 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(fs_info, &BTRFS_I(inode)->io_tree, inode);
extent_io_tree_init(fs_info, &BTRFS_I(inode)->io_tree,
IO_TREE_INODE_IO, inode);
BTRFS_I(inode)->io_tree.track_uptodate = false;
extent_map_tree_init(&BTRFS_I(inode)->extent_tree);
......@@ -2751,8 +2753,10 @@ 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, &fs_info->freed_extents[0], NULL);
extent_io_tree_init(fs_info, &fs_info->freed_extents[1], NULL);
extent_io_tree_init(fs_info, &fs_info->freed_extents[0],
IO_TREE_FS_INFO_FREED_EXTENTS0, NULL);
extent_io_tree_init(fs_info, &fs_info->freed_extents[1],
IO_TREE_FS_INFO_FREED_EXTENTS1, NULL);
fs_info->pinned_extents = &fs_info->freed_extents[0];
set_bit(BTRFS_FS_BARRIER, &fs_info->flags);
......
......@@ -233,7 +233,8 @@ void __cold extent_io_exit(void)
}
void extent_io_tree_init(struct btrfs_fs_info *fs_info,
struct extent_io_tree *tree, void *private_data)
struct extent_io_tree *tree, unsigned int owner,
void *private_data)
{
tree->fs_info = fs_info;
tree->state = RB_ROOT;
......@@ -241,6 +242,7 @@ void extent_io_tree_init(struct btrfs_fs_info *fs_info,
tree->dirty_bytes = 0;
spin_lock_init(&tree->lock);
tree->private_data = private_data;
tree->owner = owner;
}
static struct extent_state *alloc_extent_state(gfp_t mask)
......
......@@ -106,12 +106,27 @@ struct extent_io_ops {
int mirror);
};
enum {
IO_TREE_FS_INFO_FREED_EXTENTS0,
IO_TREE_FS_INFO_FREED_EXTENTS1,
IO_TREE_INODE_IO,
IO_TREE_INODE_IO_FAILURE,
IO_TREE_RELOC_BLOCKS,
IO_TREE_TRANS_DIRTY_PAGES,
IO_TREE_ROOT_DIRTY_LOG_PAGES,
IO_TREE_SELFTEST,
};
struct extent_io_tree {
struct rb_root state;
struct btrfs_fs_info *fs_info;
void *private_data;
u64 dirty_bytes;
bool track_uptodate;
/* Who owns this io tree, should be one of IO_TREE_* */
u8 owner;
spinlock_t lock;
const struct extent_io_ops *ops;
};
......@@ -241,7 +256,8 @@ typedef struct extent_map *(get_extent_t)(struct btrfs_inode *inode,
int create);
void extent_io_tree_init(struct btrfs_fs_info *fs_info,
struct extent_io_tree *tree, void *private_data);
struct extent_io_tree *tree, unsigned int owner,
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,
......
......@@ -9182,8 +9182,9 @@ struct inode *btrfs_alloc_inode(struct super_block *sb)
inode = &ei->vfs_inode;
extent_map_tree_init(&ei->extent_tree);
extent_io_tree_init(fs_info, &ei->io_tree, inode);
extent_io_tree_init(fs_info, &ei->io_failure_tree, inode);
extent_io_tree_init(fs_info, &ei->io_tree, IO_TREE_INODE_IO, inode);
extent_io_tree_init(fs_info, &ei->io_failure_tree,
IO_TREE_INODE_IO_FAILURE, inode);
ei->io_tree.track_uptodate = true;
ei->io_failure_tree.track_uptodate = true;
atomic_set(&ei->sync_writers, 0);
......
......@@ -4234,7 +4234,8 @@ static struct reloc_control *alloc_reloc_control(struct btrfs_fs_info *fs_info)
INIT_LIST_HEAD(&rc->dirty_subvol_roots);
backref_cache_init(&rc->backref_cache);
mapping_tree_init(&rc->reloc_root_tree);
extent_io_tree_init(fs_info, &rc->processed_blocks, NULL);
extent_io_tree_init(fs_info, &rc->processed_blocks,
IO_TREE_RELOC_BLOCKS, NULL);
return rc;
}
......
......@@ -115,8 +115,10 @@ 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, &fs_info->freed_extents[0], NULL);
extent_io_tree_init(fs_info, &fs_info->freed_extents[1], NULL);
extent_io_tree_init(fs_info, &fs_info->freed_extents[0],
IO_TREE_FS_INFO_FREED_EXTENTS0, NULL);
extent_io_tree_init(fs_info, &fs_info->freed_extents[1],
IO_TREE_FS_INFO_FREED_EXTENTS1, NULL);
fs_info->pinned_extents = &fs_info->freed_extents[0];
set_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
......
......@@ -77,7 +77,11 @@ static int test_find_delalloc(u32 sectorsize)
return -ENOMEM;
}
extent_io_tree_init(NULL, &tmp, NULL);
/*
* Passing NULL as we don't have fs_info but tracepoints are not used
* at this point
*/
extent_io_tree_init(NULL, &tmp, IO_TREE_SELFTEST, NULL);
/*
* First go through and create and mark all of our pages dirty, we pin
......
......@@ -275,7 +275,7 @@ loop:
spin_lock_init(&cur_trans->dropped_roots_lock);
list_add_tail(&cur_trans->list, &fs_info->trans_list);
extent_io_tree_init(fs_info, &cur_trans->dirty_pages,
fs_info->btree_inode);
IO_TREE_TRANS_DIRTY_PAGES, fs_info->btree_inode);
fs_info->generation++;
cur_trans->transid = fs_info->generation;
fs_info->running_transaction = cur_trans;
......
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