From: Omar Sandoval <osandov@xxxxxx>
Now that we don't keep long-standing reservations for orphan items, we
can get rid of root->orphan_lock and root->orphan_block_rsv, as well as
some related functions.
Signed-off-by: Omar Sandoval <osandov@xxxxxx>
---
fs/btrfs/ctree.h | 5 -----
fs/btrfs/disk-io.c | 8 --------
fs/btrfs/extent-tree.c | 38 --------------------------------------
fs/btrfs/inode.c | 41 ++++++-----------------------------------
4 files changed, 6 insertions(+), 86 deletions(-)
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 2771cc56a622..d66241a35fab 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -1219,9 +1219,7 @@ struct btrfs_root {
spinlock_t log_extents_lock[2];
struct list_head logged_list[2];
- spinlock_t orphan_lock;
atomic_t orphan_inodes;
- struct btrfs_block_rsv *orphan_block_rsv;
int orphan_cleanup_state;
spinlock_t inode_lock;
@@ -2764,9 +2762,6 @@ void btrfs_delalloc_release_space(struct inode *inode,
void btrfs_free_reserved_data_space_noquota(struct inode *inode, u64 start,
u64 len);
void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans);
-int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
- struct btrfs_inode *inode);
-void btrfs_orphan_release_metadata(struct btrfs_inode *inode);
int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
struct btrfs_block_rsv *rsv,
int nitems,
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 60caa68c3618..24e15e2080f4 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -1185,7 +1185,6 @@ static void __setup_root(struct btrfs_root *root, struct btrfs_fs_info *fs_info,
root->inode_tree = RB_ROOT;
INIT_RADIX_TREE(&root->delayed_nodes_tree, GFP_ATOMIC);
root->block_rsv = NULL;
- root->orphan_block_rsv = NULL;
INIT_LIST_HEAD(&root->dirty_list);
INIT_LIST_HEAD(&root->root_list);
@@ -1195,7 +1194,6 @@ static void __setup_root(struct btrfs_root *root, struct btrfs_fs_info *fs_info,
INIT_LIST_HEAD(&root->ordered_root);
INIT_LIST_HEAD(&root->logged_list[0]);
INIT_LIST_HEAD(&root->logged_list[1]);
- spin_lock_init(&root->orphan_lock);
spin_lock_init(&root->inode_lock);
spin_lock_init(&root->delalloc_lock);
spin_lock_init(&root->ordered_extent_lock);
@@ -3674,8 +3672,6 @@ static void free_fs_root(struct btrfs_root *root)
{
iput(root->ino_cache_inode);
WARN_ON(!RB_EMPTY_ROOT(&root->inode_tree));
- btrfs_free_block_rsv(root->fs_info, root->orphan_block_rsv);
- root->orphan_block_rsv = NULL;
if (root->anon_dev)
free_anon_bdev(root->anon_dev);
if (root->subv_writers)
@@ -3766,7 +3762,6 @@ int btrfs_commit_super(struct btrfs_fs_info *fs_info)
void close_ctree(struct btrfs_fs_info *fs_info)
{
- struct btrfs_root *root = fs_info->tree_root;
int ret;
set_bit(BTRFS_FS_CLOSING_START, &fs_info->flags);
@@ -3861,9 +3856,6 @@ void close_ctree(struct btrfs_fs_info *fs_info)
btrfs_free_stripe_hash_table(fs_info);
btrfs_free_ref_cache(fs_info);
- __btrfs_free_block_rsv(root->orphan_block_rsv);
- root->orphan_block_rsv = NULL;
-
while (!list_empty(&fs_info->pinned_chunks)) {
struct extent_map *em;
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 51b5e2da708c..3f2e026bc206 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -5949,44 +5949,6 @@ void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans)
trans->chunk_bytes_reserved = 0;
}
-/* Can only return 0 or -ENOSPC */
-int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
- struct btrfs_inode *inode)
-{
- struct btrfs_fs_info *fs_info = btrfs_sb(inode->vfs_inode.i_sb);
- struct btrfs_root *root = inode->root;
- /*
- * We always use trans->block_rsv here as we will have reserved space
- * for our orphan when starting the transaction, using get_block_rsv()
- * here will sometimes make us choose the wrong block rsv as we could be
- * doing a reloc inode for a non refcounted root.
- */
- struct btrfs_block_rsv *src_rsv = trans->block_rsv;
- struct btrfs_block_rsv *dst_rsv = root->orphan_block_rsv;
-
- /*
- * We need to hold space in order to delete our orphan item once we've
- * added it, so this takes the reservation so we can release it later
- * when we are truly done with the orphan item.
- */
- u64 num_bytes = btrfs_calc_trans_metadata_size(fs_info, 1);
-
- trace_btrfs_space_reservation(fs_info, "orphan", btrfs_ino(inode),
- num_bytes, 1);
- return btrfs_block_rsv_migrate(src_rsv, dst_rsv, num_bytes, 1);
-}
-
-void btrfs_orphan_release_metadata(struct btrfs_inode *inode)
-{
- struct btrfs_fs_info *fs_info = btrfs_sb(inode->vfs_inode.i_sb);
- struct btrfs_root *root = inode->root;
- u64 num_bytes = btrfs_calc_trans_metadata_size(fs_info, 1);
-
- trace_btrfs_space_reservation(fs_info, "orphan", btrfs_ino(inode),
- num_bytes, 0);
- btrfs_block_rsv_release(fs_info, root->orphan_block_rsv, num_bytes);
-}
-
/*
* btrfs_subvolume_reserve_metadata() - reserve space for subvolume operation
* root: the root of the parent directory
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index cf7ad82dd262..88b89a48b66f 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -3293,37 +3293,18 @@ void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info)
}
/*
- * This is called in transaction commit time. If there are no orphan
- * files in the subvolume, it removes orphan item and frees block_rsv
- * structure.
+ * This is called in transaction commit time. If there are no orphan files in
+ * the subvolume, it removes the orphan item.
*/
void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
struct btrfs_root *root)
{
struct btrfs_fs_info *fs_info = root->fs_info;
- struct btrfs_block_rsv *block_rsv;
int ret;
- if (atomic_read(&root->orphan_inodes) ||
- root->orphan_cleanup_state != ORPHAN_CLEANUP_DONE)
- return;
-
- spin_lock(&root->orphan_lock);
- if (atomic_read(&root->orphan_inodes)) {
- spin_unlock(&root->orphan_lock);
- return;
- }
-
- if (root->orphan_cleanup_state != ORPHAN_CLEANUP_DONE) {
- spin_unlock(&root->orphan_lock);
- return;
- }
-
- block_rsv = root->orphan_block_rsv;
- root->orphan_block_rsv = NULL;
- spin_unlock(&root->orphan_lock);
-
- if (test_bit(BTRFS_ROOT_ORPHAN_ITEM_INSERTED, &root->state) &&
+ if (atomic_read(&root->orphan_inodes) == 0 &&
+ root->orphan_cleanup_state == ORPHAN_CLEANUP_DONE &&
+ test_bit(BTRFS_ROOT_ORPHAN_ITEM_INSERTED, &root->state) &&
btrfs_root_refs(&root->root_item) > 0) {
ret = btrfs_del_orphan_item(trans, fs_info->tree_root,
root->root_key.objectid);
@@ -3333,11 +3314,6 @@ void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans,
clear_bit(BTRFS_ROOT_ORPHAN_ITEM_INSERTED,
&root->state);
}
-
- if (block_rsv) {
- WARN_ON(block_rsv->size > 0);
- btrfs_free_block_rsv(fs_info, block_rsv);
- }
}
/*
@@ -3562,12 +3538,7 @@ int btrfs_orphan_cleanup(struct btrfs_root *root)
root->orphan_cleanup_state = ORPHAN_CLEANUP_DONE;
- if (root->orphan_block_rsv)
- btrfs_block_rsv_release(fs_info, root->orphan_block_rsv,
- (u64)-1);
-
- if (root->orphan_block_rsv ||
- test_bit(BTRFS_ROOT_ORPHAN_ITEM_INSERTED, &root->state)) {
+ if (test_bit(BTRFS_ROOT_ORPHAN_ITEM_INSERTED, &root->state)) {
trans = btrfs_join_transaction(root);
if (!IS_ERR(trans))
btrfs_end_transaction(trans);
--
2.17.0
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