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btrfs: free-space-cache, clean up unnecessary root arguments 

The free space cache APIs accept a root but always use the tree root.

Also, btrfs_truncate_free_space_cache accepts a root AND an inode but
the inode always points to the root anyway, so let's just pass the inode.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Jeff Mahoney 2017-02-15 16:28:30 -05:00 committed by David Sterba
parent 5e00f1939f
commit 77ab86bf1c
5 changed files with 22 additions and 26 deletions
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9
fs/btrfs/extent-tree.c
View File

@ -3374,7 +3374,7 @@ static int cache_save_setup(struct btrfs_block_group_cache *block_group,
if (trans->aborted)
return 0;
again:
inode = lookup_free_space_inode(root, block_group, path);
inode = lookup_free_space_inode(fs_info, block_group, path);
if (IS_ERR(inode) && PTR_ERR(inode) != -ENOENT) {
ret = PTR_ERR(inode);
btrfs_release_path(path);
@ -3388,7 +3388,8 @@ static int cache_save_setup(struct btrfs_block_group_cache *block_group,
if (block_group->ro)
goto out_free;
ret = create_free_space_inode(root, trans, block_group, path);
ret = create_free_space_inode(fs_info, trans, block_group,
path);
if (ret)
goto out_free;
goto again;
@ -3430,7 +3431,7 @@ static int cache_save_setup(struct btrfs_block_group_cache *block_group,
if (ret)
goto out_put;
ret = btrfs_truncate_free_space_cache(root, trans, NULL, inode);
ret = btrfs_truncate_free_space_cache(trans, NULL, inode);
if (ret)
goto out_put;
}
@ -10314,7 +10315,7 @@ int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
* get the inode first so any iput calls done for the io_list
* aren't the final iput (no unlinks allowed now)
*/
inode = lookup_free_space_inode(tree_root, block_group, path);
inode = lookup_free_space_inode(fs_info, block_group, path);
mutex_lock(&trans->transaction->cache_write_mutex);
/*

25
fs/btrfs/free-space-cache.c
View File

@ -94,12 +94,11 @@ static struct inode *__lookup_free_space_inode(struct btrfs_root *root,
return inode;
}
struct inode *lookup_free_space_inode(struct btrfs_root *root,
struct inode *lookup_free_space_inode(struct btrfs_fs_info *fs_info,
struct btrfs_block_group_cache
*block_group, struct btrfs_path *path)
{
struct inode *inode = NULL;
struct btrfs_fs_info *fs_info = root->fs_info;
u32 flags = BTRFS_INODE_NODATASUM | BTRFS_INODE_NODATACOW;
spin_lock(&block_group->lock);
@ -109,7 +108,7 @@ struct inode *lookup_free_space_inode(struct btrfs_root *root,
if (inode)
return inode;
inode = __lookup_free_space_inode(root, path,
inode = __lookup_free_space_inode(fs_info->tree_root, path,
block_group->key.objectid);
if (IS_ERR(inode))
return inode;
@ -192,7 +191,7 @@ static int __create_free_space_inode(struct btrfs_root *root,
return 0;
}
int create_free_space_inode(struct btrfs_root *root,
int create_free_space_inode(struct btrfs_fs_info *fs_info,
struct btrfs_trans_handle *trans,
struct btrfs_block_group_cache *block_group,
struct btrfs_path *path)
@ -200,11 +199,11 @@ int create_free_space_inode(struct btrfs_root *root,
int ret;
u64 ino;
ret = btrfs_find_free_objectid(root, &ino);
ret = btrfs_find_free_objectid(fs_info->tree_root, &ino);
if (ret < 0)
return ret;
return __create_free_space_inode(root, trans, path, ino,
return __create_free_space_inode(fs_info->tree_root, trans, path, ino,
block_group->key.objectid);
}
@ -227,11 +226,11 @@ int btrfs_check_trunc_cache_free_space(struct btrfs_fs_info *fs_info,
return ret;
}
int btrfs_truncate_free_space_cache(struct btrfs_root *root,
struct btrfs_trans_handle *trans,
int btrfs_truncate_free_space_cache(struct btrfs_trans_handle *trans,
struct btrfs_block_group_cache *block_group,
struct inode *inode)
{
struct btrfs_root *root = BTRFS_I(inode)->root;
int ret = 0;
struct btrfs_path *path = btrfs_alloc_path();
bool locked = false;
@ -824,7 +823,6 @@ int load_free_space_cache(struct btrfs_fs_info *fs_info,
struct btrfs_block_group_cache *block_group)
{
struct btrfs_free_space_ctl *ctl = block_group->free_space_ctl;
struct btrfs_root *root = fs_info->tree_root;
struct inode *inode;
struct btrfs_path *path;
int ret = 0;
@ -848,7 +846,7 @@ int load_free_space_cache(struct btrfs_fs_info *fs_info,
path->search_commit_root = 1;
path->skip_locking = 1;
inode = lookup_free_space_inode(root, block_group, path);
inode = lookup_free_space_inode(fs_info, block_group, path);
if (IS_ERR(inode)) {
btrfs_free_path(path);
return 0;
@ -1370,7 +1368,6 @@ int btrfs_write_out_cache(struct btrfs_fs_info *fs_info,
struct btrfs_block_group_cache *block_group,
struct btrfs_path *path)
{
struct btrfs_root *root = fs_info->tree_root;
struct btrfs_free_space_ctl *ctl = block_group->free_space_ctl;
struct inode *inode;
int ret = 0;
@ -1382,12 +1379,12 @@ int btrfs_write_out_cache(struct btrfs_fs_info *fs_info,
}
spin_unlock(&block_group->lock);
inode = lookup_free_space_inode(root, block_group, path);
inode = lookup_free_space_inode(fs_info, block_group, path);
if (IS_ERR(inode))
return 0;
ret = __btrfs_write_out_cache(root, inode, ctl, block_group,
&block_group->io_ctl, trans);
ret = __btrfs_write_out_cache(fs_info->tree_root, inode, ctl,
block_group, &block_group->io_ctl, trans);
if (ret) {
#ifdef DEBUG
btrfs_err(fs_info,

7
fs/btrfs/free-space-cache.h
View File

@ -51,18 +51,17 @@ struct btrfs_free_space_op {
struct btrfs_io_ctl;
struct inode *lookup_free_space_inode(struct btrfs_root *root,
struct inode *lookup_free_space_inode(struct btrfs_fs_info *fs_info,
struct btrfs_block_group_cache
*block_group, struct btrfs_path *path);
int create_free_space_inode(struct btrfs_root *root,
int create_free_space_inode(struct btrfs_fs_info *fs_info,
struct btrfs_trans_handle *trans,
struct btrfs_block_group_cache *block_group,
struct btrfs_path *path);
int btrfs_check_trunc_cache_free_space(struct btrfs_fs_info *fs_info,
struct btrfs_block_rsv *rsv);
int btrfs_truncate_free_space_cache(struct btrfs_root *root,
struct btrfs_trans_handle *trans,
int btrfs_truncate_free_space_cache(struct btrfs_trans_handle *trans,
struct btrfs_block_group_cache *block_group,
struct inode *inode);
int load_free_space_cache(struct btrfs_fs_info *fs_info,

2
fs/btrfs/inode-map.c
View File

@ -467,7 +467,7 @@ int btrfs_save_ino_cache(struct btrfs_root *root,
}
if (i_size_read(inode) > 0) {
ret = btrfs_truncate_free_space_cache(root, trans, NULL, inode);
ret = btrfs_truncate_free_space_cache(trans, NULL, inode);
if (ret) {
if (ret != -ENOSPC)
btrfs_abort_transaction(trans, ret);

5
fs/btrfs/relocation.c
View File

@ -3543,7 +3543,7 @@ static int delete_block_group_cache(struct btrfs_fs_info *fs_info,
goto out;
}
ret = btrfs_truncate_free_space_cache(root, trans, block_group, inode);
ret = btrfs_truncate_free_space_cache(trans, block_group, inode);
btrfs_end_transaction(trans);
btrfs_btree_balance_dirty(fs_info);
@ -4347,8 +4347,7 @@ int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start)
goto out;
}
inode = lookup_free_space_inode(fs_info->tree_root, rc->block_group,
path);
inode = lookup_free_space_inode(fs_info, rc->block_group, path);
btrfs_free_path(path);
if (!IS_ERR(inode))