Merge branch 'integration' into for-linus

[pandora-kernel.git] / fs / btrfs / relocation.c

diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
index ca38eca..59bb176 100644 (file)
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -677,6 +677,8 @@ struct backref_node *build_backref_tree(struct reloc_control *rc,
                err = -ENOMEM;
                goto out;
        }
+       path1->reada = 1;
+       path2->reada = 2;
 
        node = alloc_backref_node(cache);
        if (!node) {
@@ -1366,7 +1368,7 @@ int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
        int ret;
 
        if (!root->reloc_root)
-               return 0;
+               goto out;
 
        reloc_root = root->reloc_root;
        root_item = &reloc_root->root_item;
@@ -1388,6 +1390,8 @@ int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
        ret = btrfs_update_root(trans, root->fs_info->tree_root,
                                &reloc_root->root_key, root_item);
        BUG_ON(ret);
+
+out:
        return 0;
 }
 
@@ -1999,6 +2003,7 @@ static noinline_for_stack int merge_reloc_root(struct reloc_control *rc,
        path = btrfs_alloc_path();
        if (!path)
                return -ENOMEM;
+       path->reada = 1;
 
        reloc_root = root->reloc_root;
        root_item = &reloc_root->root_item;
@@ -2139,10 +2144,11 @@ int prepare_to_merge(struct reloc_control *rc, int err)
        u64 num_bytes = 0;
        int ret;
 
-       mutex_lock(&root->fs_info->trans_mutex);
+       mutex_lock(&root->fs_info->reloc_mutex);
        rc->merging_rsv_size += root->nodesize * (BTRFS_MAX_LEVEL - 1) * 2;
        rc->merging_rsv_size += rc->nodes_relocated * 2;
-       mutex_unlock(&root->fs_info->trans_mutex);
+       mutex_unlock(&root->fs_info->reloc_mutex);
+
 again:
        if (!err) {
                num_bytes = rc->merging_rsv_size;
@@ -2152,7 +2158,7 @@ again:
                        err = ret;
        }
 
-       trans = btrfs_join_transaction(rc->extent_root, 1);
+       trans = btrfs_join_transaction(rc->extent_root);
        if (IS_ERR(trans)) {
                if (!err)
                        btrfs_block_rsv_release(rc->extent_root,
@@ -2211,9 +2217,16 @@ int merge_reloc_roots(struct reloc_control *rc)
        int ret;
 again:
        root = rc->extent_root;
-       mutex_lock(&root->fs_info->trans_mutex);
+
+       /*
+        * this serializes us with btrfs_record_root_in_transaction,
+        * we have to make sure nobody is in the middle of
+        * adding their roots to the list while we are
+        * doing this splice
+        */
+       mutex_lock(&root->fs_info->reloc_mutex);
        list_splice_init(&rc->reloc_roots, &reloc_roots);
-       mutex_unlock(&root->fs_info->trans_mutex);
+       mutex_unlock(&root->fs_info->reloc_mutex);
 
        while (!list_empty(&reloc_roots)) {
                found = 1;
@@ -2942,7 +2955,8 @@ static int relocate_file_extent_cluster(struct inode *inode,
                        page_cache_sync_readahead(inode->i_mapping,
                                                  ra, NULL, index,
                                                  last_index + 1 - index);
-                       page = grab_cache_page(inode->i_mapping, index);
+                       page = find_or_create_page(inode->i_mapping, index,
+                                                  GFP_NOFS);
                        if (!page) {
                                btrfs_delalloc_release_metadata(inode,
                                                        PAGE_CACHE_SIZE);
@@ -3236,7 +3250,7 @@ truncate:
                goto out;
        }
 
-       trans = btrfs_join_transaction(root, 0);
+       trans = btrfs_join_transaction(root);
        if (IS_ERR(trans)) {
                btrfs_free_path(path);
                ret = PTR_ERR(trans);
@@ -3300,6 +3314,7 @@ static int find_data_references(struct reloc_control *rc,
        path = btrfs_alloc_path();
        if (!path)
                return -ENOMEM;
+       path->reada = 1;
 
        root = read_fs_root(rc->extent_root->fs_info, ref_root);
        if (IS_ERR(root)) {
@@ -3586,17 +3601,19 @@ next:
 static void set_reloc_control(struct reloc_control *rc)
 {
        struct btrfs_fs_info *fs_info = rc->extent_root->fs_info;
-       mutex_lock(&fs_info->trans_mutex);
+
+       mutex_lock(&fs_info->reloc_mutex);
        fs_info->reloc_ctl = rc;
-       mutex_unlock(&fs_info->trans_mutex);
+       mutex_unlock(&fs_info->reloc_mutex);
 }
 
 static void unset_reloc_control(struct reloc_control *rc)
 {
        struct btrfs_fs_info *fs_info = rc->extent_root->fs_info;
-       mutex_lock(&fs_info->trans_mutex);
+
+       mutex_lock(&fs_info->reloc_mutex);
        fs_info->reloc_ctl = NULL;
-       mutex_unlock(&fs_info->trans_mutex);
+       mutex_unlock(&fs_info->reloc_mutex);
 }
 
 static int check_extent_flags(u64 flags)
@@ -3645,7 +3662,7 @@ int prepare_to_relocate(struct reloc_control *rc)
        rc->create_reloc_tree = 1;
        set_reloc_control(rc);
 
-       trans = btrfs_join_transaction(rc->extent_root, 1);
+       trans = btrfs_join_transaction(rc->extent_root);
        BUG_ON(IS_ERR(trans));
        btrfs_commit_transaction(trans, rc->extent_root);
        return 0;
@@ -3668,6 +3685,7 @@ static noinline_for_stack int relocate_block_group(struct reloc_control *rc)
        path = btrfs_alloc_path();
        if (!path)
                return -ENOMEM;
+       path->reada = 1;
 
        ret = prepare_to_relocate(rc);
        if (ret) {
@@ -3834,7 +3852,7 @@ restart:
        btrfs_block_rsv_release(rc->extent_root, rc->block_rsv, (u64)-1);
 
        /* get rid of pinned extents */
-       trans = btrfs_join_transaction(rc->extent_root, 1);
+       trans = btrfs_join_transaction(rc->extent_root);
        if (IS_ERR(trans))
                err = PTR_ERR(trans);
        else
@@ -4093,6 +4111,7 @@ int btrfs_recover_relocation(struct btrfs_root *root)
        path = btrfs_alloc_path();
        if (!path)
                return -ENOMEM;
+       path->reada = -1;
 
        key.objectid = BTRFS_TREE_RELOC_OBJECTID;
        key.type = BTRFS_ROOT_ITEM_KEY;
@@ -4159,7 +4178,7 @@ int btrfs_recover_relocation(struct btrfs_root *root)
 
        set_reloc_control(rc);
 
-       trans = btrfs_join_transaction(rc->extent_root, 1);
+       trans = btrfs_join_transaction(rc->extent_root);
        if (IS_ERR(trans)) {
                unset_reloc_control(rc);
                err = PTR_ERR(trans);
@@ -4193,7 +4212,7 @@ int btrfs_recover_relocation(struct btrfs_root *root)
 
        unset_reloc_control(rc);
 
-       trans = btrfs_join_transaction(rc->extent_root, 1);
+       trans = btrfs_join_transaction(rc->extent_root);
        if (IS_ERR(trans))
                err = PTR_ERR(trans);
        else