From patchwork Thu Jul 27 22:13:00 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Boris Burkov X-Patchwork-Id: 13330835 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8FE43EB64DD for ; Thu, 27 Jul 2023 22:15:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232792AbjG0WPj (ORCPT ); Thu, 27 Jul 2023 18:15:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41678 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232659AbjG0WPi (ORCPT ); Thu, 27 Jul 2023 18:15:38 -0400 Received: from wout1-smtp.messagingengine.com (wout1-smtp.messagingengine.com [64.147.123.24]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CAADE13E for ; Thu, 27 Jul 2023 15:15:36 -0700 (PDT) Received: from compute5.internal (compute5.nyi.internal [10.202.2.45]) by mailout.west.internal (Postfix) with ESMTP id E30E632000D7; Thu, 27 Jul 2023 18:15:35 -0400 (EDT) Received: from mailfrontend1 ([10.202.2.162]) by compute5.internal (MEProxy); Thu, 27 Jul 2023 18:15:36 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bur.io; h=cc :content-transfer-encoding:content-type:date:date:from:from :in-reply-to:in-reply-to:message-id:mime-version:references :reply-to:sender:subject:subject:to:to; s=fm1; t=1690496135; x= 1690582535; bh=hOXzy+sPhO9P07P6uu6XtIGK662urP9nwQ0M0qeRdq0=; b=o KWmJ/FTxmhHV43vJENLjT5MgvT6uBhf3pjNgmP7t9HEUDuDNMX5vUo4Hc+/KOZNv AKN5IWXSfnstCUOVmFlr85P/Bk1oRJyV2JWZNkBWT2Y77q1w2m4qMAf4prW/khkB 5aC0Hpc6DGQyH4bfzYo0YnEUJC+TkGcoDLvPcP13YfkKbvWB2/+cPOoUC3nCdjXM u/S0UOi7Gy7fWZxhwB2onwcxV7PUdpqhbTLwd94geNRciMEX3JCKQ1DlPnCGx5xj /PfPsof5PnNJwmSzlJtjhZ2q29w27UfKQsKL1i48qP3CQwiBlt5HH+uhmhGG4SHq xmRW8XdWMIFJKhrryKuMQ== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-transfer-encoding:content-type :date:date:feedback-id:feedback-id:from:from:in-reply-to :in-reply-to:message-id:mime-version:references:reply-to:sender :subject:subject:to:to:x-me-proxy:x-me-proxy:x-me-sender :x-me-sender:x-sasl-enc; s=fm3; t=1690496135; x=1690582535; bh=h OXzy+sPhO9P07P6uu6XtIGK662urP9nwQ0M0qeRdq0=; b=l9BO8orYH2ULYeLHw jQQWrkceRucWignfMCYenIIkJvNYj2ubWuD/H+llhucfmrw6F2CHCO4l378bOudc alSV1LkLvG/00+QVS5k10fWvxgia2ru2OaU4kmxrhgFUYRp+6FJUeYLByo/p1jWB 688vO5tQCQPGsbmguNiDlFylfoLGDkjbYlpTrZErLMeP4WxTmwrvGnMp7VTuDmhQ sdmvLyq2X55+1DutHehB6I0bAhffzG9goHxYHNc3N9oIductyVphR/k6I895gVua oKX8JQmaSzRhy7oOY7z8Kfb81mSsQ5jEvp+Tj2FgwfR8MvHqBP/6J6puy1PM1Wsf fpu+Q== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedviedrieehgddtiecutefuodetggdotefrodftvf curfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfghnecu uegrihhlohhuthemuceftddtnecunecujfgurhephffvufffkffojghfggfgsedtkeertd ertddtnecuhfhrohhmpeeuohhrihhsuceuuhhrkhhovhcuoegsohhrihhssegsuhhrrdhi oheqnecuggftrfgrthhtvghrnhepieeuffeuvdeiueejhfehiefgkeevudejjeejffevvd ehtddufeeihfekgeeuheelnecuvehluhhsthgvrhfuihiivgepvdenucfrrghrrghmpehm rghilhhfrhhomhepsghorhhishessghurhdrihho X-ME-Proxy: Feedback-ID: i083147f8:Fastmail Received: by mail.messagingengine.com (Postfix) with ESMTPA; Thu, 27 Jul 2023 18:15:34 -0400 (EDT) From: Boris Burkov To: linux-btrfs@vger.kernel.org, kernel-team@fb.com Subject: [PATCH v5 13/18] btrfs: record simple quota deltas Date: Thu, 27 Jul 2023 15:13:00 -0700 Message-ID: <749ea44143d910a3aeef915f2cb19081ac8d2ede.1690495785.git.boris@bur.io> X-Mailer: git-send-email 2.41.0 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org At the moment that we run delayed refs, we make the final ref-count based decision on creating/removing extent (and metadata) items. Therefore, it is exactly the spot to hook up simple quotas. There are a few important subtleties to the fields we must collect to accurately track simple quotas, particularly when removing an extent. When removing a data extent, the ref could be in any tree (due to reflink, for example) and so we need to recover the owning root id from the owner ref item. When removing a metadata extent, we know the owning root from the owner field in the header when we create the delayed ref, so we can recover it from there. We must also be careful to handle reservations properly to not leaked reserved space. The happy path is freeing the reservation when the simple quota delta runs on a data extent. If that doesn't happen, due to refs canceling out or some error, the ref head already has the must_insert_reserved machinery to handle this, so we piggy back on that and use it to clean up the reserved data. Signed-off-by: Boris Burkov Reviewed-by: Josef Bacik --- fs/btrfs/delayed-ref.c | 1 + fs/btrfs/delayed-ref.h | 6 +++ fs/btrfs/extent-tree.c | 85 +++++++++++++++++++++++++++++++++++++----- 3 files changed, 82 insertions(+), 10 deletions(-) diff --git a/fs/btrfs/delayed-ref.c b/fs/btrfs/delayed-ref.c index 28ba7a9eb3c3..874c1853d9b1 100644 --- a/fs/btrfs/delayed-ref.c +++ b/fs/btrfs/delayed-ref.c @@ -745,6 +745,7 @@ static void init_delayed_ref_head(struct btrfs_delayed_ref_head *head_ref, head_ref->bytenr = bytenr; head_ref->num_bytes = num_bytes; head_ref->ref_mod = count_mod; + head_ref->reserved_bytes = reserved; head_ref->must_insert_reserved = must_insert_reserved; head_ref->owning_root = owning_root; head_ref->is_data = is_data; diff --git a/fs/btrfs/delayed-ref.h b/fs/btrfs/delayed-ref.h index 71f0a6e5d583..221d400dd88f 100644 --- a/fs/btrfs/delayed-ref.h +++ b/fs/btrfs/delayed-ref.h @@ -104,6 +104,12 @@ struct btrfs_delayed_ref_head { */ int ref_mod; + /* + * Track reserved bytes when setting must_insert_reserved. + * On success or cleanup, we will need to free the reservation. + */ + u64 reserved_bytes; + /* * when a new extent is allocated, it is just reserved in memory * The actual extent isn't inserted into the extent allocation tree diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 09fb321fa560..1b5efd03ef83 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -47,6 +47,7 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans, + struct btrfs_delayed_ref_head *href, struct btrfs_delayed_ref_node *node, u64 parent, u64 root_objectid, u64 owner_objectid, u64 owner_offset, int refs_to_drop, @@ -1482,6 +1483,7 @@ static int __btrfs_inc_extent_ref(struct btrfs_trans_handle *trans, } static int run_delayed_data_ref(struct btrfs_trans_handle *trans, + struct btrfs_delayed_ref_head *href, struct btrfs_delayed_ref_node *node, struct btrfs_delayed_extent_op *extent_op, bool insert_reserved) @@ -1505,18 +1507,28 @@ static int run_delayed_data_ref(struct btrfs_trans_handle *trans, ref_root = ref->root; if (node->action == BTRFS_ADD_DELAYED_REF && insert_reserved) { + struct btrfs_simple_quota_delta delta = { + .root = href->owning_root, + .num_bytes = node->num_bytes, + .rsv_bytes = href->reserved_bytes, + .is_data = true, + .is_inc = true, + }; + if (extent_op) flags |= extent_op->flags_to_set; ret = alloc_reserved_file_extent(trans, parent, ref_root, flags, ref->objectid, ref->offset, &ins, node->ref_mod); + if (!ret) + ret = btrfs_record_simple_quota_delta(trans->fs_info, &delta); } else if (node->action == BTRFS_ADD_DELAYED_REF) { ret = __btrfs_inc_extent_ref(trans, node, parent, ref_root, ref->objectid, ref->offset, node->ref_mod, extent_op); } else if (node->action == BTRFS_DROP_DELAYED_REF) { - ret = __btrfs_free_extent(trans, node, parent, + ret = __btrfs_free_extent(trans, href, node, parent, ref_root, ref->objectid, ref->offset, node->ref_mod, extent_op); @@ -1632,11 +1644,13 @@ static int run_delayed_extent_op(struct btrfs_trans_handle *trans, } static int run_delayed_tree_ref(struct btrfs_trans_handle *trans, + struct btrfs_delayed_ref_head *href, struct btrfs_delayed_ref_node *node, struct btrfs_delayed_extent_op *extent_op, bool insert_reserved) { int ret = 0; + struct btrfs_fs_info *fs_info = trans->fs_info; struct btrfs_delayed_tree_ref *ref; u64 parent = 0; u64 ref_root = 0; @@ -1656,13 +1670,23 @@ static int run_delayed_tree_ref(struct btrfs_trans_handle *trans, return -EIO; } if (node->action == BTRFS_ADD_DELAYED_REF && insert_reserved) { + struct btrfs_simple_quota_delta delta = { + .root = href->owning_root, + .num_bytes = fs_info->nodesize, + .rsv_bytes = 0, + .is_data = false, + .is_inc = true, + }; + BUG_ON(!extent_op || !extent_op->update_flags); ret = alloc_reserved_tree_block(trans, node, extent_op); + if (!ret) + btrfs_record_simple_quota_delta(fs_info, &delta); } else if (node->action == BTRFS_ADD_DELAYED_REF) { ret = __btrfs_inc_extent_ref(trans, node, parent, ref_root, ref->level, 0, 1, extent_op); } else if (node->action == BTRFS_DROP_DELAYED_REF) { - ret = __btrfs_free_extent(trans, node, parent, ref_root, + ret = __btrfs_free_extent(trans, href, node, parent, ref_root, ref->level, 0, 1, extent_op); } else { BUG(); @@ -1672,6 +1696,7 @@ static int run_delayed_tree_ref(struct btrfs_trans_handle *trans, /* helper function to actually process a single delayed ref entry */ static int run_one_delayed_ref(struct btrfs_trans_handle *trans, + struct btrfs_delayed_ref_head *href, struct btrfs_delayed_ref_node *node, struct btrfs_delayed_extent_op *extent_op, bool insert_reserved) @@ -1686,12 +1711,12 @@ static int run_one_delayed_ref(struct btrfs_trans_handle *trans, if (node->type == BTRFS_TREE_BLOCK_REF_KEY || node->type == BTRFS_SHARED_BLOCK_REF_KEY) - ret = run_delayed_tree_ref(trans, node, extent_op, + ret = run_delayed_tree_ref(trans, href, node, extent_op, insert_reserved); else if (node->type == BTRFS_EXTENT_DATA_REF_KEY || node->type == BTRFS_SHARED_DATA_REF_KEY) - ret = run_delayed_data_ref(trans, node, extent_op, - insert_reserved); + ret = run_delayed_data_ref(trans, href, node, + extent_op, insert_reserved); else if (node->type == BTRFS_EXTENT_OWNER_REF_KEY) ret = 0; else @@ -1788,6 +1813,11 @@ void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info, spin_unlock(&delayed_refs->lock); nr_items += btrfs_csum_bytes_to_leaves(fs_info, head->num_bytes); } + if (head->must_insert_reserved && head->is_data && + btrfs_qgroup_mode(fs_info) == BTRFS_QGROUP_MODE_SIMPLE) + btrfs_qgroup_free_refroot(fs_info, head->owning_root, + head->reserved_bytes, + BTRFS_QGROUP_RSV_DATA); btrfs_delayed_refs_rsv_release(fs_info, nr_items); } @@ -1934,8 +1964,8 @@ static int btrfs_run_delayed_refs_for_head(struct btrfs_trans_handle *trans, locked_ref->extent_op = NULL; spin_unlock(&locked_ref->lock); - ret = run_one_delayed_ref(trans, ref, extent_op, - must_insert_reserved); + ret = run_one_delayed_ref(trans, locked_ref, ref, + extent_op, must_insert_reserved); btrfs_free_delayed_extent_op(extent_op); if (ret) { @@ -2857,11 +2887,12 @@ u64 btrfs_get_extent_owner_root(struct btrfs_fs_info *fs_info, } static int do_free_extent_accounting(struct btrfs_trans_handle *trans, - u64 bytenr, u64 num_bytes, bool is_data) + u64 bytenr, struct btrfs_simple_quota_delta *delta) { int ret; + u64 num_bytes = delta->num_bytes; - if (is_data) { + if (delta->is_data) { struct btrfs_root *csum_root; csum_root = btrfs_csum_root(trans->fs_info, bytenr); @@ -2872,6 +2903,12 @@ static int do_free_extent_accounting(struct btrfs_trans_handle *trans, } } + ret = btrfs_record_simple_quota_delta(trans->fs_info, delta); + if (ret) { + btrfs_abort_transaction(trans, ret); + return ret; + } + ret = add_to_free_space_tree(trans, bytenr, num_bytes); if (ret) { btrfs_abort_transaction(trans, ret); @@ -2952,6 +2989,7 @@ static int do_free_extent_accounting(struct btrfs_trans_handle *trans, * And that (13631488 EXTENT_DATA_REF ) gets removed. */ static int __btrfs_free_extent(struct btrfs_trans_handle *trans, + struct btrfs_delayed_ref_head *href, struct btrfs_delayed_ref_node *node, u64 parent, u64 root_objectid, u64 owner_objectid, u64 owner_offset, int refs_to_drop, @@ -2974,6 +3012,7 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans, u64 bytenr = node->bytenr; u64 num_bytes = node->num_bytes; bool skinny_metadata = btrfs_fs_incompat(info, SKINNY_METADATA); + u64 delayed_ref_root = href->owning_root; extent_root = btrfs_extent_root(info, bytenr); ASSERT(extent_root); @@ -3172,6 +3211,14 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans, } } } else { + struct btrfs_simple_quota_delta delta = { + .root = delayed_ref_root, + .num_bytes = num_bytes, + .rsv_bytes = 0, + .is_data = is_data, + .is_inc = false, + }; + /* In this branch refs == 1 */ if (found_extent) { if (is_data && refs_to_drop != @@ -3210,6 +3257,16 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans, num_to_del = 2; } } + /* + * We can't infer the data owner from the delayed ref, so we + * need to try to get it from the owning ref item. + * + * If it is not present, then that extent was not written under + * simple quotas mode, so we don't need to account for its + * deletion. + */ + if (is_data) + delta.root = btrfs_get_extent_owner_root(trans->fs_info, leaf, extent_slot); ret = btrfs_del_items(trans, extent_root, path, path->slots[0], num_to_del); @@ -3219,7 +3276,7 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans, } btrfs_release_path(path); - ret = do_free_extent_accounting(trans, bytenr, num_bytes, is_data); + ret = do_free_extent_accounting(trans, bytenr, &delta); } btrfs_release_path(path); @@ -4790,6 +4847,13 @@ int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, int ret; struct btrfs_block_group *block_group; struct btrfs_space_info *space_info; + struct btrfs_simple_quota_delta delta = { + .root = root_objectid, + .num_bytes = ins->offset, + .rsv_bytes = 0, + .is_data = true, + .is_inc = true, + }; /* * Mixed block groups will exclude before processing the log so we only @@ -4818,6 +4882,7 @@ int btrfs_alloc_logged_file_extent(struct btrfs_trans_handle *trans, offset, ins, 1); if (ret) btrfs_pin_extent(trans, ins->objectid, ins->offset, 1); + ret = btrfs_record_simple_quota_delta(fs_info, &delta); btrfs_put_block_group(block_group); return ret; }