return NULL;
}
+void backref_tree_panic(struct rb_node *rb_node, int errno,
+ u64 bytenr)
+{
+
+ struct btrfs_fs_info *fs_info = NULL;
+ struct backref_node *bnode = rb_entry(rb_node, struct backref_node,
+ rb_node);
+ if (bnode->root)
+ fs_info = bnode->root->fs_info;
+ btrfs_panic(fs_info, errno, "Inconsistency in backref cache "
+ "found at offset %llu\n", (unsigned long long)bytenr);
+}
+
/*
* walk up backref nodes until reach node presents tree root
*/
rb_erase(&node->rb_node, &cache->rb_root);
node->bytenr = bytenr;
rb_node = tree_insert(&cache->rb_root, node->bytenr, &node->rb_node);
- BUG_ON(rb_node);
+ if (rb_node)
+ backref_tree_panic(rb_node, -EEXIST, bytenr);
}
/*
if (!cowonly) {
rb_node = tree_insert(&cache->rb_root, node->bytenr,
&node->rb_node);
- BUG_ON(rb_node);
+ if (rb_node)
+ backref_tree_panic(rb_node, -EEXIST, node->bytenr);
list_add_tail(&node->lower, &cache->leaves);
}
if (!cowonly) {
rb_node = tree_insert(&cache->rb_root, upper->bytenr,
&upper->rb_node);
- BUG_ON(rb_node);
+ if (rb_node)
+ backref_tree_panic(rb_node, -EEXIST,
+ upper->bytenr);
}
list_add_tail(&edge->list[UPPER], &upper->lower);
rb_node = tree_insert(&cache->rb_root, new_node->bytenr,
&new_node->rb_node);
- BUG_ON(rb_node);
+ if (rb_node)
+ backref_tree_panic(rb_node, -EEXIST, new_node->bytenr);
if (!new_node->lowest) {
list_for_each_entry(new_edge, &new_node->lower, list[UPPER]) {
/*
* helper to add 'address of tree root -> reloc tree' mapping
*/
-static int __add_reloc_root(struct btrfs_root *root)
+static int __must_check __add_reloc_root(struct btrfs_root *root)
{
struct rb_node *rb_node;
struct mapping_node *node;
struct reloc_control *rc = root->fs_info->reloc_ctl;
node = kmalloc(sizeof(*node), GFP_NOFS);
- BUG_ON(!node);
+ if (!node)
+ return -ENOMEM;
node->bytenr = root->node->start;
node->data = root;
rb_node = tree_insert(&rc->reloc_root_tree.rb_root,
node->bytenr, &node->rb_node);
spin_unlock(&rc->reloc_root_tree.lock);
- BUG_ON(rb_node);
+ if (rb_node) {
+ kfree(node);
+ btrfs_panic(root->fs_info, -EEXIST, "Duplicate root found "
+ "for start=%llu while inserting into relocation "
+ "tree\n");
+ }
list_add_tail(&root->root_list, &rc->reloc_roots);
return 0;
rb_node = tree_insert(&rc->reloc_root_tree.rb_root,
node->bytenr, &node->rb_node);
spin_unlock(&rc->reloc_root_tree.lock);
- BUG_ON(rb_node);
+ if (rb_node)
+ backref_tree_panic(rb_node, -EEXIST, node->bytenr);
} else {
list_del_init(&root->root_list);
kfree(node);
struct btrfs_root *reloc_root;
struct reloc_control *rc = root->fs_info->reloc_ctl;
int clear_rsv = 0;
+ int ret;
if (root->reloc_root) {
reloc_root = root->reloc_root;
if (clear_rsv)
trans->block_rsv = NULL;
- __add_reloc_root(reloc_root);
+ ret = __add_reloc_root(reloc_root);
+ BUG_ON(ret < 0);
root->reloc_root = reloc_root;
return 0;
}
WARN_ON(!IS_ALIGNED(end, root->sectorsize));
end--;
ret = try_lock_extent(&BTRFS_I(inode)->io_tree,
- key.offset, end,
- GFP_NOFS);
+ key.offset, end);
if (!ret)
continue;
btrfs_drop_extent_cache(inode, key.offset, end,
1);
unlock_extent(&BTRFS_I(inode)->io_tree,
- key.offset, end, GFP_NOFS);
+ key.offset, end);
}
}
}
/* the lock_extent waits for readpage to complete */
- lock_extent(&BTRFS_I(inode)->io_tree, start, end, GFP_NOFS);
+ lock_extent(&BTRFS_I(inode)->io_tree, start, end);
btrfs_drop_extent_cache(inode, start, end, 1);
- unlock_extent(&BTRFS_I(inode)->io_tree, start, end, GFP_NOFS);
+ unlock_extent(&BTRFS_I(inode)->io_tree, start, end);
}
return 0;
}
} else {
list_del_init(&reloc_root->root_list);
}
- btrfs_drop_snapshot(reloc_root, rc->block_rsv, 0, 1);
+ ret = btrfs_drop_snapshot(reloc_root, rc->block_rsv, 0, 1);
+ BUG_ON(ret < 0);
}
if (found) {
else
end = cluster->end - offset;
- lock_extent(&BTRFS_I(inode)->io_tree, start, end, GFP_NOFS);
+ lock_extent(&BTRFS_I(inode)->io_tree, start, end);
num_bytes = end + 1 - start;
ret = btrfs_prealloc_file_range(inode, 0, start,
num_bytes, num_bytes,
end + 1, &alloc_hint);
- unlock_extent(&BTRFS_I(inode)->io_tree, start, end, GFP_NOFS);
+ unlock_extent(&BTRFS_I(inode)->io_tree, start, end);
if (ret)
break;
nr++;
em->bdev = root->fs_info->fs_devices->latest_bdev;
set_bit(EXTENT_FLAG_PINNED, &em->flags);
- lock_extent(&BTRFS_I(inode)->io_tree, start, end, GFP_NOFS);
+ lock_extent(&BTRFS_I(inode)->io_tree, start, end);
while (1) {
write_lock(&em_tree->lock);
ret = add_extent_mapping(em_tree, em);
}
btrfs_drop_extent_cache(inode, start, end, 0);
}
- unlock_extent(&BTRFS_I(inode)->io_tree, start, end, GFP_NOFS);
+ unlock_extent(&BTRFS_I(inode)->io_tree, start, end);
return ret;
}
page_start = (u64)page->index << PAGE_CACHE_SHIFT;
page_end = page_start + PAGE_CACHE_SIZE - 1;
- lock_extent(&BTRFS_I(inode)->io_tree,
- page_start, page_end, GFP_NOFS);
+ lock_extent(&BTRFS_I(inode)->io_tree, page_start, page_end);
set_page_extent_mapped(page);
set_page_dirty(page);
unlock_extent(&BTRFS_I(inode)->io_tree,
- page_start, page_end, GFP_NOFS);
+ page_start, page_end);
unlock_page(page);
page_cache_release(page);
block->key_ready = 0;
rb_node = tree_insert(blocks, block->bytenr, &block->rb_node);
- BUG_ON(rb_node);
+ if (rb_node)
+ backref_tree_panic(rb_node, -EEXIST, block->bytenr);
return 0;
}
block->key_ready = 1;
rb_node = tree_insert(blocks, block->bytenr,
&block->rb_node);
- BUG_ON(rb_node);
+ if (rb_node)
+ backref_tree_panic(rb_node, -EEXIST,
+ block->bytenr);
}
if (counted)
added = 1;
static noinline_for_stack int mark_garbage_root(struct btrfs_root *root)
{
struct btrfs_trans_handle *trans;
- int ret;
+ int ret, err;
trans = btrfs_start_transaction(root->fs_info->tree_root, 0);
- BUG_ON(IS_ERR(trans));
+ if (IS_ERR(trans))
+ return PTR_ERR(trans);
memset(&root->root_item.drop_progress, 0,
sizeof(root->root_item.drop_progress));
btrfs_set_root_refs(&root->root_item, 0);
ret = btrfs_update_root(trans, root->fs_info->tree_root,
&root->root_key, &root->root_item);
- BUG_ON(ret);
- ret = btrfs_end_transaction(trans, root->fs_info->tree_root);
- BUG_ON(ret);
- return 0;
+ err = btrfs_end_transaction(trans, root->fs_info->tree_root);
+ if (err)
+ return err;
+ return ret;
}
/*
err = ret;
goto out;
}
- mark_garbage_root(reloc_root);
+ ret = mark_garbage_root(reloc_root);
+ if (ret < 0) {
+ err = ret;
+ goto out;
+ }
}
}
fs_root = read_fs_root(root->fs_info,
reloc_root->root_key.offset);
- BUG_ON(IS_ERR(fs_root));
+ if (IS_ERR(fs_root)) {
+ err = PTR_ERR(fs_root);
+ goto out_free;
+ }
- __add_reloc_root(reloc_root);
+ err = __add_reloc_root(reloc_root);
+ BUG_ON(err < 0); /* -ENOMEM or logic error */
fs_root->reloc_root = reloc_root;
}
- btrfs_commit_transaction(trans, rc->extent_root);
+ err = btrfs_commit_transaction(trans, rc->extent_root);
+ if (err)
+ goto out_free;
merge_reloc_roots(rc);
if (IS_ERR(trans))
err = PTR_ERR(trans);
else
- btrfs_commit_transaction(trans, rc->extent_root);
+ err = btrfs_commit_transaction(trans, rc->extent_root);
out_free:
kfree(rc);
out:
disk_bytenr = file_pos + BTRFS_I(inode)->index_cnt;
ret = btrfs_lookup_csums_range(root->fs_info->csum_root, disk_bytenr,
disk_bytenr + len - 1, &list, 0);
+ if (ret)
+ goto out;
while (!list_empty(&list)) {
sums = list_entry(list.next, struct btrfs_ordered_sum, list);
btrfs_add_ordered_sum(inode, ordered, sums);
}
+out:
btrfs_put_ordered_extent(ordered);
return ret;
}
* called after snapshot is created. migrate block reservation
* and create reloc root for the newly created snapshot
*/
-void btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
+int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
struct btrfs_pending_snapshot *pending)
{
struct btrfs_root *root = pending->root;
int ret;
if (!root->reloc_root)
- return;
+ return 0;
rc = root->fs_info->reloc_ctl;
rc->merging_rsv_size += rc->nodes_relocated;
ret = btrfs_block_rsv_migrate(&pending->block_rsv,
rc->block_rsv,
rc->nodes_relocated);
- BUG_ON(ret);
+ if (ret)
+ return ret;
}
new_root = pending->snap;
reloc_root = create_reloc_root(trans, root->reloc_root,
new_root->root_key.objectid);
+ if (IS_ERR(reloc_root))
+ return PTR_ERR(reloc_root);
- __add_reloc_root(reloc_root);
+ ret = __add_reloc_root(reloc_root);
+ BUG_ON(ret < 0);
new_root->reloc_root = reloc_root;
- if (rc->create_reloc_tree) {
+ if (rc->create_reloc_tree)
ret = clone_backref_node(trans, rc, root, reloc_root);
- BUG_ON(ret);
- }
+ return ret;
}
projects / ~andy / linux / blobdiff