Btrfs: Metadata ENOSPC handling for tree log
Previous patches make the allocater return -ENOSPC if there is no unreserved free metadata space. This patch updates tree log code and various other places to propagate/handle the ENOSPC error. Signed-off-by: Yan Zheng <zheng.yan@oracle.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Yan, Zheng
Chris Mason
parent
d68fc57b7e
commit
4a500fd178
5 changed files with 156 additions and 128 deletions
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@ -972,42 +972,6 @@ static int find_and_setup_root(struct btrfs_root *tree_root,
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return 0;
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}
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int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans,
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struct btrfs_fs_info *fs_info)
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{
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struct extent_buffer *eb;
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struct btrfs_root *log_root_tree = fs_info->log_root_tree;
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u64 start = 0;
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u64 end = 0;
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int ret;
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if (!log_root_tree)
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return 0;
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while (1) {
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ret = find_first_extent_bit(&log_root_tree->dirty_log_pages,
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0, &start, &end, EXTENT_DIRTY | EXTENT_NEW);
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if (ret)
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break;
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clear_extent_bits(&log_root_tree->dirty_log_pages, start, end,
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EXTENT_DIRTY | EXTENT_NEW, GFP_NOFS);
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}
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eb = fs_info->log_root_tree->node;
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WARN_ON(btrfs_header_level(eb) != 0);
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WARN_ON(btrfs_header_nritems(eb) != 0);
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ret = btrfs_free_reserved_extent(fs_info->tree_root,
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eb->start, eb->len);
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BUG_ON(ret);
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free_extent_buffer(eb);
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kfree(fs_info->log_root_tree);
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fs_info->log_root_tree = NULL;
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return 0;
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}
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static struct btrfs_root *alloc_log_tree(struct btrfs_trans_handle *trans,
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struct btrfs_fs_info *fs_info)
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{
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@ -95,8 +95,6 @@ int btrfs_congested_async(struct btrfs_fs_info *info, int iodone);
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unsigned long btrfs_async_submit_limit(struct btrfs_fs_info *info);
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int btrfs_write_tree_block(struct extent_buffer *buf);
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int btrfs_wait_tree_block_writeback(struct extent_buffer *buf);
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int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans,
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struct btrfs_fs_info *fs_info);
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int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans,
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struct btrfs_fs_info *fs_info);
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int btrfs_add_log_tree(struct btrfs_trans_handle *trans,
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@ -657,6 +657,9 @@ int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans,
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goto found;
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}
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ret = PTR_ERR(item);
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if (ret != -EFBIG && ret != -ENOENT)
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goto fail_unlock;
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if (ret == -EFBIG) {
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u32 item_size;
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/* we found one, but it isn't big enough yet */
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@ -135,6 +135,7 @@ static int start_log_trans(struct btrfs_trans_handle *trans,
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struct btrfs_root *root)
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{
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int ret;
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int err = 0;
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mutex_lock(&root->log_mutex);
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if (root->log_root) {
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@ -155,17 +156,19 @@ static int start_log_trans(struct btrfs_trans_handle *trans,
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mutex_lock(&root->fs_info->tree_log_mutex);
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if (!root->fs_info->log_root_tree) {
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ret = btrfs_init_log_root_tree(trans, root->fs_info);
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BUG_ON(ret);
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if (ret)
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err = ret;
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}
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if (!root->log_root) {
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if (err == 0 && !root->log_root) {
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ret = btrfs_add_log_tree(trans, root);
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BUG_ON(ret);
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if (ret)
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err = ret;
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}
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mutex_unlock(&root->fs_info->tree_log_mutex);
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root->log_batch++;
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atomic_inc(&root->log_writers);
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mutex_unlock(&root->log_mutex);
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return 0;
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return err;
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}
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/*
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@ -376,7 +379,7 @@ static noinline int overwrite_item(struct btrfs_trans_handle *trans,
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BUG_ON(ret);
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}
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} else if (ret) {
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BUG();
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return ret;
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}
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dst_ptr = btrfs_item_ptr_offset(path->nodes[0],
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path->slots[0]);
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@ -1699,9 +1702,9 @@ static noinline int walk_down_log_tree(struct btrfs_trans_handle *trans,
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next = btrfs_find_create_tree_block(root, bytenr, blocksize);
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wc->process_func(root, next, wc, ptr_gen);
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if (*level == 1) {
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wc->process_func(root, next, wc, ptr_gen);
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path->slots[*level]++;
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if (wc->free) {
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btrfs_read_buffer(next, ptr_gen);
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@ -1734,35 +1737,7 @@ static noinline int walk_down_log_tree(struct btrfs_trans_handle *trans,
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WARN_ON(*level < 0);
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WARN_ON(*level >= BTRFS_MAX_LEVEL);
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if (path->nodes[*level] == root->node)
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parent = path->nodes[*level];
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else
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parent = path->nodes[*level + 1];
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bytenr = path->nodes[*level]->start;
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blocksize = btrfs_level_size(root, *level);
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root_owner = btrfs_header_owner(parent);
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root_gen = btrfs_header_generation(parent);
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wc->process_func(root, path->nodes[*level], wc,
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btrfs_header_generation(path->nodes[*level]));
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if (wc->free) {
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next = path->nodes[*level];
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btrfs_tree_lock(next);
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clean_tree_block(trans, root, next);
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btrfs_set_lock_blocking(next);
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btrfs_wait_tree_block_writeback(next);
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btrfs_tree_unlock(next);
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WARN_ON(root_owner != BTRFS_TREE_LOG_OBJECTID);
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ret = btrfs_free_reserved_extent(root, bytenr, blocksize);
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BUG_ON(ret);
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}
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free_extent_buffer(path->nodes[*level]);
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path->nodes[*level] = NULL;
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*level += 1;
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path->slots[*level] = btrfs_header_nritems(path->nodes[*level]);
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cond_resched();
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return 0;
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@ -1781,7 +1756,7 @@ static noinline int walk_up_log_tree(struct btrfs_trans_handle *trans,
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for (i = *level; i < BTRFS_MAX_LEVEL - 1 && path->nodes[i]; i++) {
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slot = path->slots[i];
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if (slot < btrfs_header_nritems(path->nodes[i]) - 1) {
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if (slot + 1 < btrfs_header_nritems(path->nodes[i])) {
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struct extent_buffer *node;
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node = path->nodes[i];
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path->slots[i]++;
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@ -2047,7 +2022,6 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
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mutex_unlock(&log_root_tree->log_mutex);
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ret = update_log_root(trans, log);
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BUG_ON(ret);
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mutex_lock(&log_root_tree->log_mutex);
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if (atomic_dec_and_test(&log_root_tree->log_writers)) {
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@ -2056,6 +2030,15 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
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wake_up(&log_root_tree->log_writer_wait);
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}
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if (ret) {
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BUG_ON(ret != -ENOSPC);
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root->fs_info->last_trans_log_full_commit = trans->transid;
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btrfs_wait_marked_extents(log, &log->dirty_log_pages, mark);
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mutex_unlock(&log_root_tree->log_mutex);
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ret = -EAGAIN;
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goto out;
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}
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index2 = log_root_tree->log_transid % 2;
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if (atomic_read(&log_root_tree->log_commit[index2])) {
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btrfs_wait_marked_extents(log, &log->dirty_log_pages, mark);
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@ -2129,15 +2112,10 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
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return 0;
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}
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/*
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* free all the extents used by the tree log. This should be called
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* at commit time of the full transaction
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*/
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int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root)
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static void free_log_tree(struct btrfs_trans_handle *trans,
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struct btrfs_root *log)
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{
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int ret;
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struct btrfs_root *log;
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struct key;
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u64 start;
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u64 end;
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struct walk_control wc = {
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@ -2145,10 +2123,6 @@ int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root)
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.process_func = process_one_buffer
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};
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if (!root->log_root || root->fs_info->log_root_recovering)
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return 0;
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log = root->log_root;
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ret = walk_log_tree(trans, log, &wc);
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BUG_ON(ret);
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@ -2162,14 +2136,30 @@ int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root)
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EXTENT_DIRTY | EXTENT_NEW, GFP_NOFS);
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}
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if (log->log_transid > 0) {
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ret = btrfs_del_root(trans, root->fs_info->log_root_tree,
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&log->root_key);
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BUG_ON(ret);
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}
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root->log_root = NULL;
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free_extent_buffer(log->node);
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kfree(log);
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}
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/*
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* free all the extents used by the tree log. This should be called
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* at commit time of the full transaction
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*/
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int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root)
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{
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if (root->log_root) {
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free_log_tree(trans, root->log_root);
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root->log_root = NULL;
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}
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return 0;
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}
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int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans,
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struct btrfs_fs_info *fs_info)
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{
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if (fs_info->log_root_tree) {
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free_log_tree(trans, fs_info->log_root_tree);
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fs_info->log_root_tree = NULL;
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}
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return 0;
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}
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@ -2203,6 +2193,7 @@ int btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans,
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struct btrfs_dir_item *di;
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struct btrfs_path *path;
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int ret;
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int err = 0;
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int bytes_del = 0;
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if (BTRFS_I(dir)->logged_trans < trans->transid)
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@ -2218,7 +2209,11 @@ int btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans,
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path = btrfs_alloc_path();
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di = btrfs_lookup_dir_item(trans, log, path, dir->i_ino,
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name, name_len, -1);
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if (di && !IS_ERR(di)) {
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if (IS_ERR(di)) {
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err = PTR_ERR(di);
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goto fail;
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}
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if (di) {
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ret = btrfs_delete_one_dir_name(trans, log, path, di);
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bytes_del += name_len;
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BUG_ON(ret);
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@ -2226,7 +2221,11 @@ int btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans,
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btrfs_release_path(log, path);
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di = btrfs_lookup_dir_index_item(trans, log, path, dir->i_ino,
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index, name, name_len, -1);
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if (di && !IS_ERR(di)) {
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if (IS_ERR(di)) {
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err = PTR_ERR(di);
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goto fail;
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}
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if (di) {
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ret = btrfs_delete_one_dir_name(trans, log, path, di);
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bytes_del += name_len;
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BUG_ON(ret);
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@ -2244,6 +2243,10 @@ int btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans,
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btrfs_release_path(log, path);
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ret = btrfs_search_slot(trans, log, &key, path, 0, 1);
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if (ret < 0) {
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err = ret;
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goto fail;
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}
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if (ret == 0) {
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struct btrfs_inode_item *item;
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u64 i_size;
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@ -2261,9 +2264,13 @@ int btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans,
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ret = 0;
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btrfs_release_path(log, path);
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}
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fail:
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btrfs_free_path(path);
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mutex_unlock(&BTRFS_I(dir)->log_mutex);
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if (ret == -ENOSPC) {
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root->fs_info->last_trans_log_full_commit = trans->transid;
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ret = 0;
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}
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btrfs_end_log_trans(root);
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return 0;
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@ -2291,6 +2298,10 @@ int btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans,
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ret = btrfs_del_inode_ref(trans, log, name, name_len, inode->i_ino,
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dirid, &index);
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mutex_unlock(&BTRFS_I(inode)->log_mutex);
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if (ret == -ENOSPC) {
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root->fs_info->last_trans_log_full_commit = trans->transid;
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ret = 0;
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}
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btrfs_end_log_trans(root);
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return ret;
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@ -2318,7 +2329,8 @@ static noinline int insert_dir_log_key(struct btrfs_trans_handle *trans,
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else
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key.type = BTRFS_DIR_LOG_INDEX_KEY;
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ret = btrfs_insert_empty_item(trans, log, path, &key, sizeof(*item));
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BUG_ON(ret);
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if (ret)
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return ret;
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item = btrfs_item_ptr(path->nodes[0], path->slots[0],
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struct btrfs_dir_log_item);
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@ -2343,6 +2355,7 @@ static noinline int log_dir_items(struct btrfs_trans_handle *trans,
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struct btrfs_key max_key;
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struct btrfs_root *log = root->log_root;
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struct extent_buffer *src;
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int err = 0;
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int ret;
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int i;
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int nritems;
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@ -2405,6 +2418,10 @@ static noinline int log_dir_items(struct btrfs_trans_handle *trans,
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ret = overwrite_item(trans, log, dst_path,
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path->nodes[0], path->slots[0],
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&tmp);
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if (ret) {
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err = ret;
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goto done;
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}
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}
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}
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btrfs_release_path(root, path);
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@ -2432,7 +2449,10 @@ static noinline int log_dir_items(struct btrfs_trans_handle *trans,
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goto done;
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ret = overwrite_item(trans, log, dst_path, src, i,
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&min_key);
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BUG_ON(ret);
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if (ret) {
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err = ret;
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goto done;
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}
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}
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path->slots[0] = nritems;
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@ -2454,22 +2474,30 @@ static noinline int log_dir_items(struct btrfs_trans_handle *trans,
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ret = overwrite_item(trans, log, dst_path,
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path->nodes[0], path->slots[0],
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&tmp);
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BUG_ON(ret);
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last_offset = tmp.offset;
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if (ret)
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err = ret;
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else
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last_offset = tmp.offset;
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goto done;
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}
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}
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done:
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*last_offset_ret = last_offset;
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btrfs_release_path(root, path);
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btrfs_release_path(log, dst_path);
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/* insert the log range keys to indicate where the log is valid */
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ret = insert_dir_log_key(trans, log, path, key_type, inode->i_ino,
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first_offset, last_offset);
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BUG_ON(ret);
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return 0;
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if (err == 0) {
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*last_offset_ret = last_offset;
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/*
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* insert the log range keys to indicate where the log
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* is valid
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*/
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ret = insert_dir_log_key(trans, log, path, key_type,
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inode->i_ino, first_offset,
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last_offset);
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if (ret)
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err = ret;
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}
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return err;
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}
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/*
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@ -2501,7 +2529,8 @@ static noinline int log_directory_changes(struct btrfs_trans_handle *trans,
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ret = log_dir_items(trans, root, inode, path,
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dst_path, key_type, min_key,
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&max_key);
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BUG_ON(ret);
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if (ret)
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return ret;
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if (max_key == (u64)-1)
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break;
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min_key = max_key + 1;
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@ -2535,8 +2564,8 @@ static int drop_objectid_items(struct btrfs_trans_handle *trans,
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while (1) {
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ret = btrfs_search_slot(trans, log, &key, path, -1, 1);
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if (ret != 1)
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BUG_ON(ret == 0);
|
||||
if (ret < 0)
|
||||
break;
|
||||
|
||||
if (path->slots[0] == 0)
|
||||
|
|
@ -2554,7 +2583,7 @@ static int drop_objectid_items(struct btrfs_trans_handle *trans,
|
|||
btrfs_release_path(log, path);
|
||||
}
|
||||
btrfs_release_path(log, path);
|
||||
return 0;
|
||||
return ret;
|
||||
}
|
||||
|
||||
static noinline int copy_items(struct btrfs_trans_handle *trans,
|
||||
|
|
@ -2587,7 +2616,10 @@ static noinline int copy_items(struct btrfs_trans_handle *trans,
|
|||
}
|
||||
ret = btrfs_insert_empty_items(trans, log, dst_path,
|
||||
ins_keys, ins_sizes, nr);
|
||||
BUG_ON(ret);
|
||||
if (ret) {
|
||||
kfree(ins_data);
|
||||
return ret;
|
||||
}
|
||||
|
||||
for (i = 0; i < nr; i++, dst_path->slots[0]++) {
|
||||
dst_offset = btrfs_item_ptr_offset(dst_path->nodes[0],
|
||||
|
|
@ -2660,16 +2692,17 @@ static noinline int copy_items(struct btrfs_trans_handle *trans,
|
|||
* we have to do this after the loop above to avoid changing the
|
||||
* log tree while trying to change the log tree.
|
||||
*/
|
||||
ret = 0;
|
||||
while (!list_empty(&ordered_sums)) {
|
||||
struct btrfs_ordered_sum *sums = list_entry(ordered_sums.next,
|
||||
struct btrfs_ordered_sum,
|
||||
list);
|
||||
ret = btrfs_csum_file_blocks(trans, log, sums);
|
||||
BUG_ON(ret);
|
||||
if (!ret)
|
||||
ret = btrfs_csum_file_blocks(trans, log, sums);
|
||||
list_del(&sums->list);
|
||||
kfree(sums);
|
||||
}
|
||||
return 0;
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* log a single inode in the tree log.
|
||||
|
|
@ -2697,6 +2730,7 @@ static int btrfs_log_inode(struct btrfs_trans_handle *trans,
|
|||
struct btrfs_root *log = root->log_root;
|
||||
struct extent_buffer *src = NULL;
|
||||
u32 size;
|
||||
int err = 0;
|
||||
int ret;
|
||||
int nritems;
|
||||
int ins_start_slot = 0;
|
||||
|
|
@ -2739,7 +2773,10 @@ static int btrfs_log_inode(struct btrfs_trans_handle *trans,
|
|||
} else {
|
||||
ret = btrfs_truncate_inode_items(trans, log, inode, 0, 0);
|
||||
}
|
||||
BUG_ON(ret);
|
||||
if (ret) {
|
||||
err = ret;
|
||||
goto out_unlock;
|
||||
}
|
||||
path->keep_locks = 1;
|
||||
|
||||
while (1) {
|
||||
|
|
@ -2768,7 +2805,10 @@ static int btrfs_log_inode(struct btrfs_trans_handle *trans,
|
|||
|
||||
ret = copy_items(trans, log, dst_path, src, ins_start_slot,
|
||||
ins_nr, inode_only);
|
||||
BUG_ON(ret);
|
||||
if (ret) {
|
||||
err = ret;
|
||||
goto out_unlock;
|
||||
}
|
||||
ins_nr = 1;
|
||||
ins_start_slot = path->slots[0];
|
||||
next_slot:
|
||||
|
|
@ -2784,7 +2824,10 @@ static int btrfs_log_inode(struct btrfs_trans_handle *trans,
|
|||
ret = copy_items(trans, log, dst_path, src,
|
||||
ins_start_slot,
|
||||
ins_nr, inode_only);
|
||||
BUG_ON(ret);
|
||||
if (ret) {
|
||||
err = ret;
|
||||
goto out_unlock;
|
||||
}
|
||||
ins_nr = 0;
|
||||
}
|
||||
btrfs_release_path(root, path);
|
||||
|
|
@ -2802,7 +2845,10 @@ static int btrfs_log_inode(struct btrfs_trans_handle *trans,
|
|||
ret = copy_items(trans, log, dst_path, src,
|
||||
ins_start_slot,
|
||||
ins_nr, inode_only);
|
||||
BUG_ON(ret);
|
||||
if (ret) {
|
||||
err = ret;
|
||||
goto out_unlock;
|
||||
}
|
||||
ins_nr = 0;
|
||||
}
|
||||
WARN_ON(ins_nr);
|
||||
|
|
@ -2810,14 +2856,18 @@ static int btrfs_log_inode(struct btrfs_trans_handle *trans,
|
|||
btrfs_release_path(root, path);
|
||||
btrfs_release_path(log, dst_path);
|
||||
ret = log_directory_changes(trans, root, inode, path, dst_path);
|
||||
BUG_ON(ret);
|
||||
if (ret) {
|
||||
err = ret;
|
||||
goto out_unlock;
|
||||
}
|
||||
}
|
||||
BTRFS_I(inode)->logged_trans = trans->transid;
|
||||
out_unlock:
|
||||
mutex_unlock(&BTRFS_I(inode)->log_mutex);
|
||||
|
||||
btrfs_free_path(path);
|
||||
btrfs_free_path(dst_path);
|
||||
return 0;
|
||||
return err;
|
||||
}
|
||||
|
||||
/*
|
||||
|
|
@ -2942,10 +2992,13 @@ int btrfs_log_inode_parent(struct btrfs_trans_handle *trans,
|
|||
goto end_no_trans;
|
||||
}
|
||||
|
||||
start_log_trans(trans, root);
|
||||
ret = start_log_trans(trans, root);
|
||||
if (ret)
|
||||
goto end_trans;
|
||||
|
||||
ret = btrfs_log_inode(trans, root, inode, inode_only);
|
||||
BUG_ON(ret);
|
||||
if (ret)
|
||||
goto end_trans;
|
||||
|
||||
/*
|
||||
* for regular files, if its inode is already on disk, we don't
|
||||
|
|
@ -2955,8 +3008,10 @@ int btrfs_log_inode_parent(struct btrfs_trans_handle *trans,
|
|||
*/
|
||||
if (S_ISREG(inode->i_mode) &&
|
||||
BTRFS_I(inode)->generation <= last_committed &&
|
||||
BTRFS_I(inode)->last_unlink_trans <= last_committed)
|
||||
goto no_parent;
|
||||
BTRFS_I(inode)->last_unlink_trans <= last_committed) {
|
||||
ret = 0;
|
||||
goto end_trans;
|
||||
}
|
||||
|
||||
inode_only = LOG_INODE_EXISTS;
|
||||
while (1) {
|
||||
|
|
@ -2970,15 +3025,21 @@ int btrfs_log_inode_parent(struct btrfs_trans_handle *trans,
|
|||
if (BTRFS_I(inode)->generation >
|
||||
root->fs_info->last_trans_committed) {
|
||||
ret = btrfs_log_inode(trans, root, inode, inode_only);
|
||||
BUG_ON(ret);
|
||||
if (ret)
|
||||
goto end_trans;
|
||||
}
|
||||
if (IS_ROOT(parent))
|
||||
break;
|
||||
|
||||
parent = parent->d_parent;
|
||||
}
|
||||
no_parent:
|
||||
ret = 0;
|
||||
end_trans:
|
||||
if (ret < 0) {
|
||||
BUG_ON(ret != -ENOSPC);
|
||||
root->fs_info->last_trans_log_full_commit = trans->transid;
|
||||
ret = 1;
|
||||
}
|
||||
btrfs_end_log_trans(root);
|
||||
end_no_trans:
|
||||
return ret;
|
||||
|
|
@ -3020,7 +3081,7 @@ int btrfs_recover_log_trees(struct btrfs_root *log_root_tree)
|
|||
path = btrfs_alloc_path();
|
||||
BUG_ON(!path);
|
||||
|
||||
trans = btrfs_start_transaction(fs_info->tree_root, 1);
|
||||
trans = btrfs_start_transaction(fs_info->tree_root, 0);
|
||||
|
||||
wc.trans = trans;
|
||||
wc.pin = 1;
|
||||
|
|
|
|||
|
|
@ -25,6 +25,8 @@
|
|||
int btrfs_sync_log(struct btrfs_trans_handle *trans,
|
||||
struct btrfs_root *root);
|
||||
int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root);
|
||||
int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans,
|
||||
struct btrfs_fs_info *fs_info);
|
||||
int btrfs_recover_log_trees(struct btrfs_root *tree_root);
|
||||
int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans,
|
||||
struct btrfs_root *root, struct dentry *dentry);
|
||||
|
|
|
|||
Loading…
Reference in a new issue