]> git.karo-electronics.de Git - karo-tx-linux.git/blobdiff - fs/btrfs/transaction.c
Btrfs: Reduce stack usage in the resizer, fix 32 bit compiles
[karo-tx-linux.git] / fs / btrfs / transaction.c
index 372b61f5733fea2a9a562af8732e5ee00dc705f8..02721eea9a7ac7bb8d3ce8f474f66f0584a801a2 100644 (file)
@@ -169,7 +169,7 @@ int btrfs_write_and_wait_transaction(struct btrfs_trans_handle *trans,
                clear_extent_dirty(dirty_pages, start, end, GFP_NOFS);
                while(start <= end) {
                        index = start >> PAGE_CACHE_SHIFT;
-                       start = (index + 1) << PAGE_CACHE_SHIFT;
+                       start = (u64)(index + 1) << PAGE_CACHE_SHIFT;
                        page = find_lock_page(btree_inode->i_mapping, index);
                        if (!page)
                                continue;
@@ -205,12 +205,13 @@ int btrfs_commit_tree_roots(struct btrfs_trans_handle *trans,
 
        btrfs_write_dirty_block_groups(trans, extent_root);
        while(1) {
-               old_extent_block = btrfs_root_blocknr(&extent_root->root_item);
-               if (old_extent_block ==
-                   extent_buffer_blocknr(extent_root->node))
+               old_extent_block = btrfs_root_bytenr(&extent_root->root_item);
+               if (old_extent_block == extent_root->node->start)
                        break;
-               btrfs_set_root_blocknr(&extent_root->root_item,
-                              extent_buffer_blocknr(extent_root->node));
+               btrfs_set_root_bytenr(&extent_root->root_item,
+                                     extent_root->node->start);
+               btrfs_set_root_level(&extent_root->root_item,
+                                    btrfs_header_level(extent_root->node));
                ret = btrfs_update_root(trans, tree_root,
                                        &extent_root->root_key,
                                        &extent_root->root_item);
@@ -284,8 +285,8 @@ static int add_dirty_roots(struct btrfs_trans_handle *trans,
                                     (unsigned long)root->root_key.objectid,
                                     BTRFS_ROOT_TRANS_TAG);
                        if (root->commit_root == root->node) {
-                               WARN_ON(extent_buffer_blocknr(root->node) !=
-                                       btrfs_root_blocknr(&root->root_item));
+                               WARN_ON(root->node->start !=
+                                       btrfs_root_bytenr(&root->root_item));
                                free_extent_buffer(root->commit_root);
                                root->commit_root = NULL;
 
@@ -314,8 +315,10 @@ static int add_dirty_roots(struct btrfs_trans_handle *trans,
                        root->commit_root = NULL;
 
                        root->root_key.offset = root->fs_info->generation;
-                       btrfs_set_root_blocknr(&root->root_item,
-                                      extent_buffer_blocknr(root->node));
+                       btrfs_set_root_bytenr(&root->root_item,
+                                             root->node->start);
+                       btrfs_set_root_level(&root->root_item,
+                                            btrfs_header_level(root->node));
                        err = btrfs_insert_root(trans, root->fs_info->tree_root,
                                                &root->root_key,
                                                &root->root_item);
@@ -350,15 +353,13 @@ int btrfs_defrag_root(struct btrfs_root *root, int cacheonly)
 
        if (root->defrag_running)
                return 0;
-
        trans = btrfs_start_transaction(root, 1);
-       while (0) {
+       while (1) {
                root->defrag_running = 1;
                ret = btrfs_defrag_leaves(trans, root, cacheonly);
                nr = trans->blocks_used;
                btrfs_end_transaction(trans, root);
                mutex_unlock(&info->fs_mutex);
-
                btrfs_btree_balance_dirty(info->tree_root, nr);
                cond_resched();
 
@@ -397,7 +398,7 @@ int btrfs_defrag_dirty_roots(struct btrfs_fs_info *info)
                        btrfs_defrag_root(root, 1);
                }
        }
-       // btrfs_defrag_root(info->extent_root, 1);
+       btrfs_defrag_root(info->extent_root, 1);
        return err;
 }
 
@@ -407,8 +408,8 @@ static int drop_dirty_roots(struct btrfs_root *tree_root,
        struct dirty_root *dirty;
        struct btrfs_trans_handle *trans;
        unsigned long nr;
-       u64 num_blocks;
-       u64 blocks_used;
+       u64 num_bytes;
+       u64 bytes_used;
        int ret = 0;
        int err;
 
@@ -419,7 +420,7 @@ static int drop_dirty_roots(struct btrfs_root *tree_root,
                dirty = list_entry(list->next, struct dirty_root, list);
                list_del_init(&dirty->list);
 
-               num_blocks = btrfs_root_used(&dirty->root->root_item);
+               num_bytes = btrfs_root_used(&dirty->root->root_item);
                root = dirty->latest_root;
 
                while(1) {
@@ -440,18 +441,17 @@ static int drop_dirty_roots(struct btrfs_root *tree_root,
                        BUG_ON(ret);
                        mutex_unlock(&tree_root->fs_info->fs_mutex);
                        btrfs_btree_balance_dirty(tree_root, nr);
-                       schedule();
-
+                       cond_resched();
                        mutex_lock(&tree_root->fs_info->fs_mutex);
                }
                BUG_ON(ret);
 
-               num_blocks -= btrfs_root_used(&dirty->root->root_item);
-               blocks_used = btrfs_root_used(&root->root_item);
-               if (num_blocks) {
+               num_bytes -= btrfs_root_used(&dirty->root->root_item);
+               bytes_used = btrfs_root_used(&root->root_item);
+               if (num_bytes) {
                        record_root_in_trans(root);
                        btrfs_set_root_used(&root->root_item,
-                                                  blocks_used - num_blocks);
+                                           bytes_used - num_bytes);
                }
                ret = btrfs_del_root(trans, tree_root, &dirty->root->root_key);
                if (ret) {
@@ -468,7 +468,7 @@ static int drop_dirty_roots(struct btrfs_root *tree_root,
                mutex_unlock(&tree_root->fs_info->fs_mutex);
 
                btrfs_btree_balance_dirty(tree_root, nr);
-               schedule();
+               cond_resched();
        }
        return ret;
 }
@@ -481,11 +481,10 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
        struct btrfs_transaction *cur_trans;
        struct btrfs_transaction *prev_trans = NULL;
        struct list_head dirty_fs_roots;
-       struct radix_tree_root pinned_copy;
+       struct extent_map_tree *pinned_copy;
        DEFINE_WAIT(wait);
        int ret;
 
-       init_bit_radix(&pinned_copy);
        INIT_LIST_HEAD(&dirty_fs_roots);
 
        mutex_lock(&root->fs_info->trans_mutex);
@@ -506,6 +505,14 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
                mutex_lock(&root->fs_info->fs_mutex);
                return 0;
        }
+
+       pinned_copy = kmalloc(sizeof(*pinned_copy), GFP_NOFS);
+       if (!pinned_copy)
+               return -ENOMEM;
+
+       extent_map_tree_init(pinned_copy,
+                            root->fs_info->btree_inode->i_mapping, GFP_NOFS);
+
        trans->transaction->in_commit = 1;
        cur_trans = trans->transaction;
        if (cur_trans->list.prev != &root->fs_info->trans_list) {
@@ -559,22 +566,28 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
        btrfs_set_super_generation(&root->fs_info->super_copy,
                                   cur_trans->transid);
        btrfs_set_super_root(&root->fs_info->super_copy,
-                    extent_buffer_blocknr(root->fs_info->tree_root->node));
+                            root->fs_info->tree_root->node->start);
+       btrfs_set_super_root_level(&root->fs_info->super_copy,
+                          btrfs_header_level(root->fs_info->tree_root->node));
 
        write_extent_buffer(root->fs_info->sb_buffer,
                            &root->fs_info->super_copy, 0,
                            sizeof(root->fs_info->super_copy));
 
-       btrfs_copy_pinned(root, &pinned_copy);
+       btrfs_copy_pinned(root, pinned_copy);
 
        mutex_unlock(&root->fs_info->trans_mutex);
        mutex_unlock(&root->fs_info->fs_mutex);
        ret = btrfs_write_and_wait_transaction(trans, root);
        BUG_ON(ret);
        write_ctree_super(trans, root);
+
        mutex_lock(&root->fs_info->fs_mutex);
-       btrfs_finish_extent_commit(trans, root, &pinned_copy);
+       btrfs_finish_extent_commit(trans, root, pinned_copy);
        mutex_lock(&root->fs_info->trans_mutex);
+
+       kfree(pinned_copy);
+
        cur_trans->commit_done = 1;
        root->fs_info->last_trans_committed = cur_trans->transid;
        wake_up(&cur_trans->commit_wait);
@@ -611,12 +624,20 @@ int btrfs_clean_old_snapshots(struct btrfs_root *root)
        }
        return 0;
 }
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
+void btrfs_transaction_cleaner(void *p)
+#else
 void btrfs_transaction_cleaner(struct work_struct *work)
+#endif
 {
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
+       struct btrfs_fs_info *fs_info = p;
+#else
        struct btrfs_fs_info *fs_info = container_of(work,
                                                     struct btrfs_fs_info,
                                                     trans_work.work);
 
+#endif
        struct btrfs_root *root = fs_info->tree_root;
        struct btrfs_transaction *cur;
        struct btrfs_trans_handle *trans;
@@ -663,7 +684,7 @@ void __init btrfs_init_transaction_sys(void)
        trans_wq = create_workqueue("btrfs");
 }
 
-void __exit btrfs_exit_transaction_sys(void)
+void btrfs_exit_transaction_sys(void)
 {
        destroy_workqueue(trans_wq);
 }