diff options
| -rw-r--r-- | fs/btrfs/ctree.h | 1 | ||||
| -rw-r--r-- | fs/btrfs/extent-tree.c | 44 | ||||
| -rw-r--r-- | fs/btrfs/transaction.c | 6 | ||||
| -rw-r--r-- | fs/btrfs/transaction.h | 1 |
4 files changed, 50 insertions, 2 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 9d7a6c38f0b1..8ee5645ef9e1 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -3458,6 +3458,7 @@ int btrfs_check_data_free_space(struct inode *inode, u64 bytes, u64 write_bytes) void btrfs_free_reserved_data_space(struct inode *inode, u64 bytes); void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans, struct btrfs_root *root); +void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans); int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans, struct inode *inode); void btrfs_orphan_release_metadata(struct inode *inode); diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 1cbc71d8cb96..4e08e47ace30 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -4116,11 +4116,19 @@ static void check_system_chunk(struct btrfs_trans_handle *trans, struct btrfs_space_info *info; u64 left; u64 thresh; + int ret = 0; + + /* + * Needed because we can end up allocating a system chunk and for an + * atomic and race free space reservation in the chunk block reserve. + */ + ASSERT(mutex_is_locked(&root->fs_info->chunk_mutex)); info = __find_space_info(root->fs_info, BTRFS_BLOCK_GROUP_SYSTEM); spin_lock(&info->lock); left = info->total_bytes - info->bytes_used - info->bytes_pinned - - info->bytes_reserved - info->bytes_readonly; + info->bytes_reserved - info->bytes_readonly - + info->bytes_may_use; spin_unlock(&info->lock); thresh = get_system_chunk_thresh(root, type); @@ -4134,7 +4142,21 @@ static void check_system_chunk(struct btrfs_trans_handle *trans, u64 flags; flags = btrfs_get_alloc_profile(root->fs_info->chunk_root, 0); - btrfs_alloc_chunk(trans, root, flags); + /* + * Ignore failure to create system chunk. We might end up not + * needing it, as we might not need to COW all nodes/leafs from + * the paths we visit in the chunk tree (they were already COWed + * or created in the current transaction for example). + */ + ret = btrfs_alloc_chunk(trans, root, flags); + } + + if (!ret) { + ret = btrfs_block_rsv_add(root->fs_info->chunk_root, + &root->fs_info->chunk_block_rsv, + thresh, BTRFS_RESERVE_NO_FLUSH); + if (!ret) + trans->chunk_bytes_reserved += thresh; } } @@ -5192,6 +5214,24 @@ void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans, trans->bytes_reserved = 0; } +/* + * To be called after all the new block groups attached to the transaction + * handle have been created (btrfs_create_pending_block_groups()). + */ +void btrfs_trans_release_chunk_metadata(struct btrfs_trans_handle *trans) +{ + struct btrfs_fs_info *fs_info = trans->root->fs_info; + + if (!trans->chunk_bytes_reserved) + return; + + WARN_ON_ONCE(!list_empty(&trans->new_bgs)); + + block_rsv_release_bytes(fs_info, &fs_info->chunk_block_rsv, NULL, + trans->chunk_bytes_reserved); + trans->chunk_bytes_reserved = 0; +} + /* Can only return 0 or -ENOSPC */ int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans, struct inode *inode) diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c index 5628e25250c0..03a3ec7e31ea 100644 --- a/fs/btrfs/transaction.c +++ b/fs/btrfs/transaction.c @@ -509,6 +509,7 @@ again: h->transaction = cur_trans; h->blocks_used = 0; h->bytes_reserved = 0; + h->chunk_bytes_reserved = 0; h->root = root; h->delayed_ref_updates = 0; h->use_count = 1; @@ -792,6 +793,8 @@ static int __btrfs_end_transaction(struct btrfs_trans_handle *trans, if (!list_empty(&trans->new_bgs)) btrfs_create_pending_block_groups(trans, root); + btrfs_trans_release_chunk_metadata(trans); + if (lock && !atomic_read(&root->fs_info->open_ioctl_trans) && should_end_transaction(trans, root) && ACCESS_ONCE(cur_trans->state) == TRANS_STATE_RUNNING) { @@ -2054,6 +2057,8 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans, clear_bit(BTRFS_INODE_BTREE_LOG1_ERR, &btree_ino->runtime_flags); clear_bit(BTRFS_INODE_BTREE_LOG2_ERR, &btree_ino->runtime_flags); + btrfs_trans_release_chunk_metadata(trans); + spin_lock(&root->fs_info->trans_lock); cur_trans->state = TRANS_STATE_UNBLOCKED; root->fs_info->running_transaction = NULL; @@ -2123,6 +2128,7 @@ scrub_continue: btrfs_scrub_continue(root); cleanup_transaction: btrfs_trans_release_metadata(trans, root); + btrfs_trans_release_chunk_metadata(trans); trans->block_rsv = NULL; if (trans->qgroup_reserved) { btrfs_qgroup_free(root, trans->qgroup_reserved); diff --git a/fs/btrfs/transaction.h b/fs/btrfs/transaction.h index 0b24755596ba..036fa83d6ccb 100644 --- a/fs/btrfs/transaction.h +++ b/fs/btrfs/transaction.h @@ -102,6 +102,7 @@ struct btrfs_transaction { struct btrfs_trans_handle { u64 transid; u64 bytes_reserved; + u64 chunk_bytes_reserved; u64 qgroup_reserved; unsigned long use_count; unsigned long blocks_reserved; |