From patchwork Wed Jul 26 20:38:38 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Boris Burkov X-Patchwork-Id: 13328555 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 804BFC0015E for ; Wed, 26 Jul 2023 20:41:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229728AbjGZUlF (ORCPT ); Wed, 26 Jul 2023 16:41:05 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60784 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229840AbjGZUlE (ORCPT ); Wed, 26 Jul 2023 16:41:04 -0400 Received: from out2-smtp.messagingengine.com (out2-smtp.messagingengine.com [66.111.4.26]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id ED23DEC for ; Wed, 26 Jul 2023 13:41:02 -0700 (PDT) Received: from compute3.internal (compute3.nyi.internal [10.202.2.43]) by mailout.nyi.internal (Postfix) with ESMTP id 68B3A5C0126; Wed, 26 Jul 2023 16:41:02 -0400 (EDT) Received: from mailfrontend1 ([10.202.2.162]) by compute3.internal (MEProxy); Wed, 26 Jul 2023 16:41:02 -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=1690404062; x= 1690490462; bh=+Ctw+HL3vdtGQ34s0VFf0jPGzCiYNcIv+uKb51hps9w=; b=M 2GQTE3lSGibZD9KAo2MdK2OR7arR6zYQSrIi/XRXyv7PmkwtUIzcaRClPiYXpm74 /D8h0DBUfl6HnIjmnkVXD+4Zwul0+Z7+GJlSgmOXi3KEGlRLWCxWQVwbp5YuzW3P bc9ssg8BdMUBgZqGfCgLc3G21dxSzaU8B7iNMxR357T2EarepH9KEK5HFQlCdGWy dvUbgLmPE6ttg4XdVw+NEiJMvtjECwCKlFqJPtNBwwmhwZ6PDo/abbFSgLUpf/py qrn884nYk4VviN+l7LwRGkC5GKpLb/BitZE+PK+WD/52hw2aA5fEntKsjIwxHQuk 6wsM9hngSCAv2Qk8nZfcw== 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=1690404062; x=1690490462; bh=+ Ctw+HL3vdtGQ34s0VFf0jPGzCiYNcIv+uKb51hps9w=; b=nxfbTSKVi3QvvVRP2 jOjp/YYToTsWJfWp5chonjhbHBTzo6/tVmMTYFs7ISe9uObz83uwiTeCztDLr4WJ F2tWPpDuwvRasx1+s4KE7z0OyoPP3KXwfM5z38MrSc7lBjwzVXmP8BH1XkMpO0T3 EVQzsFb0MuehZ1suoaJKwF2kJi0lDt4f4Ptpv+JjcNMrYuPtCVKQvjiCrsRTaLPa dSdwD/6y5r7NmrPjcwx9iiSo0x84ufCfNvEgO88URoeC1wfPtIxnEKY0II0MGu8s LUIwuksmFI0xIcw+JDCOlg/OA0j93Db0QPnpp8miXR7BPnGVKooQ6ePU5bp+weXP 1sriw== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedviedriedvgddugeelucetufdoteggodetrfdotf fvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfqfgfvpdfurfetoffkrfgpnffqhgen uceurghilhhouhhtmecufedttdenucenucfjughrpefhvffufffkofgjfhgggfestdekre dtredttdenucfhrhhomhepuehorhhishcuuehurhhkohhvuceosghorhhishessghurhdr ihhoqeenucggtffrrghtthgvrhhnpeeiueffuedvieeujefhheeigfekvedujeejjeffve dvhedtudefiefhkeegueehleenucevlhhushhtvghrufhiiigvpedvnecurfgrrhgrmhep mhgrihhlfhhrohhmpegsohhrihhssegsuhhrrdhioh X-ME-Proxy: Feedback-ID: i083147f8:Fastmail Received: by mail.messagingengine.com (Postfix) with ESMTPA; Wed, 26 Jul 2023 16:41:01 -0400 (EDT) From: Boris Burkov To: linux-btrfs@vger.kernel.org, kernel-team@fb.com Subject: [PATCH v4 11/18] btrfs: new inline ref storing owning subvol of data extents Date: Wed, 26 Jul 2023 13:38:38 -0700 Message-ID: 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 In order to implement simple quota groups, we need to be able to associate a data extent with the subvolume that created it. Once you account for reflink, this information cannot be recovered without explicitly storing it. Options for storing it are: - a new key/item - a new extent inline ref item The former is backwards compatible, but wastes space, the latter is incompat, but is efficient in space and reuses the existing inline ref machinery, while only abusing it a tiny amount -- specifically, the new item is not a ref, per-se. Signed-off-by: Boris Burkov --- fs/btrfs/accessors.h | 4 +++ fs/btrfs/backref.c | 3 ++ fs/btrfs/extent-tree.c | 56 ++++++++++++++++++++++++++------- fs/btrfs/print-tree.c | 12 +++++++ fs/btrfs/ref-verify.c | 3 ++ fs/btrfs/tree-checker.c | 3 ++ include/uapi/linux/btrfs_tree.h | 6 ++++ 7 files changed, 76 insertions(+), 11 deletions(-) diff --git a/fs/btrfs/accessors.h b/fs/btrfs/accessors.h index 8cfc8214109c..a23045c05937 100644 --- a/fs/btrfs/accessors.h +++ b/fs/btrfs/accessors.h @@ -349,6 +349,8 @@ BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, count, 3 BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, count, 32); +BTRFS_SETGET_FUNCS(extent_owner_ref_root_id, struct btrfs_extent_owner_ref, root_id, 64); + BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref, type, 8); BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref, @@ -365,6 +367,8 @@ static inline u32 btrfs_extent_inline_ref_size(int type) if (type == BTRFS_EXTENT_DATA_REF_KEY) return sizeof(struct btrfs_extent_data_ref) + offsetof(struct btrfs_extent_inline_ref, offset); + if (type == BTRFS_EXTENT_OWNER_REF_KEY) + return sizeof(struct btrfs_extent_inline_ref); return 0; } diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c index 79336fa853db..d5bb6a880713 100644 --- a/fs/btrfs/backref.c +++ b/fs/btrfs/backref.c @@ -1129,6 +1129,9 @@ static int add_inline_refs(struct btrfs_backref_walk_ctx *ctx, count, sc, GFP_NOFS); break; } + case BTRFS_EXTENT_OWNER_REF_KEY: + WARN_ON(!btrfs_fs_incompat(ctx->fs_info, SIMPLE_QUOTA)); + break; default: WARN_ON(1); } diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 8e9a0da55f4c..d3b09e2269b0 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -342,9 +342,13 @@ int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb, struct btrfs_extent_inline_ref *iref, enum btrfs_inline_ref_type is_data) { + struct btrfs_fs_info *fs_info = eb->fs_info; int type = btrfs_extent_inline_ref_type(eb, iref); u64 offset = btrfs_extent_inline_ref_offset(eb, iref); + if (type == BTRFS_EXTENT_OWNER_REF_KEY && btrfs_fs_incompat(fs_info, SIMPLE_QUOTA)) + return type; + if (type == BTRFS_TREE_BLOCK_REF_KEY || type == BTRFS_SHARED_BLOCK_REF_KEY || type == BTRFS_SHARED_DATA_REF_KEY || @@ -353,26 +357,25 @@ int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb, if (type == BTRFS_TREE_BLOCK_REF_KEY) return type; if (type == BTRFS_SHARED_BLOCK_REF_KEY) { - ASSERT(eb->fs_info); + ASSERT(fs_info); /* * Every shared one has parent tree block, * which must be aligned to sector size. */ - if (offset && - IS_ALIGNED(offset, eb->fs_info->sectorsize)) + if (offset && IS_ALIGNED(offset, fs_info->sectorsize)) return type; } } else if (is_data == BTRFS_REF_TYPE_DATA) { if (type == BTRFS_EXTENT_DATA_REF_KEY) return type; if (type == BTRFS_SHARED_DATA_REF_KEY) { - ASSERT(eb->fs_info); + ASSERT(fs_info); /* * Every shared one has parent tree block, * which must be aligned to sector size. */ if (offset && - IS_ALIGNED(offset, eb->fs_info->sectorsize)) + IS_ALIGNED(offset, fs_info->sectorsize)) return type; } } else { @@ -382,7 +385,7 @@ int btrfs_get_extent_inline_ref_type(const struct extent_buffer *eb, } btrfs_print_leaf(eb); - btrfs_err(eb->fs_info, + btrfs_err(fs_info, "eb %llu iref 0x%lx invalid extent inline ref type %d", eb->start, (unsigned long)iref, type); WARN_ON(1); @@ -891,6 +894,11 @@ int lookup_inline_extent_backref(struct btrfs_trans_handle *trans, } iref = (struct btrfs_extent_inline_ref *)ptr; type = btrfs_get_extent_inline_ref_type(leaf, iref, needed); + if (type == BTRFS_EXTENT_OWNER_REF_KEY) { + WARN_ON(!btrfs_fs_incompat(fs_info, SIMPLE_QUOTA)); + ptr += btrfs_extent_inline_ref_size(type); + continue; + } if (type == BTRFS_REF_TYPE_INVALID) { err = -EUCLEAN; goto out; @@ -1684,6 +1692,8 @@ static int run_one_delayed_ref(struct btrfs_trans_handle *trans, node->type == BTRFS_SHARED_DATA_REF_KEY) ret = run_delayed_data_ref(trans, node, extent_op, insert_reserved); + else if (node->type == BTRFS_EXTENT_OWNER_REF_KEY) + ret = 0; else BUG(); if (ret && insert_reserved) @@ -2250,6 +2260,7 @@ static noinline int check_committed_ref(struct btrfs_root *root, struct btrfs_extent_item *ei; struct btrfs_key key; u32 item_size; + u32 expected_size; int type; int ret; @@ -2276,10 +2287,22 @@ static noinline int check_committed_ref(struct btrfs_root *root, ret = 1; item_size = btrfs_item_size(leaf, path->slots[0]); ei = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_extent_item); + expected_size = sizeof(*ei) + btrfs_extent_inline_ref_size(BTRFS_EXTENT_DATA_REF_KEY); + + /* No inline refs; we need to bail before checking for owner ref */ + if (item_size == sizeof(*ei)) + goto out; + + /* Check for an owner ref; skip over it to the real inline refs */ + iref = (struct btrfs_extent_inline_ref *)(ei + 1); + type = btrfs_get_extent_inline_ref_type(leaf, iref, BTRFS_REF_TYPE_DATA); + if (btrfs_fs_incompat(fs_info, SIMPLE_QUOTA) && type == BTRFS_EXTENT_OWNER_REF_KEY) { + expected_size += btrfs_extent_inline_ref_size(BTRFS_EXTENT_OWNER_REF_KEY); + iref = (struct btrfs_extent_inline_ref *)(iref + 1); + } /* If extent item has more than 1 inline ref then it's shared */ - if (item_size != sizeof(*ei) + - btrfs_extent_inline_ref_size(BTRFS_EXTENT_DATA_REF_KEY)) + if (item_size != expected_size) goto out; /* @@ -2291,8 +2314,6 @@ static noinline int check_committed_ref(struct btrfs_root *root, btrfs_root_last_snapshot(&root->root_item))) goto out; - iref = (struct btrfs_extent_inline_ref *)(ei + 1); - /* If this extent has SHARED_DATA_REF then it's shared */ type = btrfs_get_extent_inline_ref_type(leaf, iref, BTRFS_REF_TYPE_DATA); if (type != BTRFS_EXTENT_DATA_REF_KEY) @@ -4542,18 +4563,23 @@ static int alloc_reserved_file_extent(struct btrfs_trans_handle *trans, struct btrfs_root *extent_root; int ret; struct btrfs_extent_item *extent_item; + struct btrfs_extent_owner_ref *oref; struct btrfs_extent_inline_ref *iref; struct btrfs_path *path; struct extent_buffer *leaf; int type; u32 size; + bool simple_quota = btrfs_qgroup_mode(fs_info) == BTRFS_QGROUP_MODE_SIMPLE; if (parent > 0) type = BTRFS_SHARED_DATA_REF_KEY; else type = BTRFS_EXTENT_DATA_REF_KEY; - size = sizeof(*extent_item) + btrfs_extent_inline_ref_size(type); + size = sizeof(*extent_item); + if (simple_quota) + size += btrfs_extent_inline_ref_size(BTRFS_EXTENT_OWNER_REF_KEY); + size += btrfs_extent_inline_ref_size(type); path = btrfs_alloc_path(); if (!path) @@ -4574,8 +4600,16 @@ static int alloc_reserved_file_extent(struct btrfs_trans_handle *trans, btrfs_set_extent_flags(leaf, extent_item, flags | BTRFS_EXTENT_FLAG_DATA); + iref = (struct btrfs_extent_inline_ref *)(extent_item + 1); + if (simple_quota) { + btrfs_set_extent_inline_ref_type(leaf, iref, BTRFS_EXTENT_OWNER_REF_KEY); + oref = (struct btrfs_extent_owner_ref *)(&iref->offset); + btrfs_set_extent_owner_ref_root_id(leaf, oref, root_objectid); + iref = (struct btrfs_extent_inline_ref *)(oref + 1); + } btrfs_set_extent_inline_ref_type(leaf, iref, type); + if (parent > 0) { struct btrfs_shared_data_ref *ref; ref = (struct btrfs_shared_data_ref *)(iref + 1); diff --git a/fs/btrfs/print-tree.c b/fs/btrfs/print-tree.c index aa06d9ca911d..3fac15ce0db0 100644 --- a/fs/btrfs/print-tree.c +++ b/fs/btrfs/print-tree.c @@ -80,12 +80,20 @@ static void print_extent_data_ref(const struct extent_buffer *eb, btrfs_extent_data_ref_count(eb, ref)); } +static void print_extent_owner_ref(const struct extent_buffer *eb, + struct btrfs_extent_owner_ref *ref) +{ + WARN_ON(!btrfs_fs_incompat(eb->fs_info, SIMPLE_QUOTA)); + pr_cont("extent data owner root %llu\n", btrfs_extent_owner_ref_root_id(eb, ref)); +} + static void print_extent_item(const struct extent_buffer *eb, int slot, int type) { struct btrfs_extent_item *ei; struct btrfs_extent_inline_ref *iref; struct btrfs_extent_data_ref *dref; struct btrfs_shared_data_ref *sref; + struct btrfs_extent_owner_ref *oref; struct btrfs_disk_key key; unsigned long end; unsigned long ptr; @@ -159,6 +167,10 @@ static void print_extent_item(const struct extent_buffer *eb, int slot, int type "\t\t\t(parent %llu not aligned to sectorsize %u)\n", offset, eb->fs_info->sectorsize); break; + case BTRFS_EXTENT_OWNER_REF_KEY: + oref = (struct btrfs_extent_owner_ref *)(&iref->offset); + print_extent_owner_ref(eb, oref); + break; default: pr_cont("(extent %llu has INVALID ref type %d)\n", eb->start, type); diff --git a/fs/btrfs/ref-verify.c b/fs/btrfs/ref-verify.c index b7b3bd86f5e2..c0660233feb4 100644 --- a/fs/btrfs/ref-verify.c +++ b/fs/btrfs/ref-verify.c @@ -485,6 +485,9 @@ static int process_extent_item(struct btrfs_fs_info *fs_info, ret = add_shared_data_ref(fs_info, offset, count, key->objectid, key->offset); break; + case BTRFS_EXTENT_OWNER_REF_KEY: + WARN_ON(!btrfs_fs_incompat(fs_info, SIMPLE_QUOTA)); + break; default: btrfs_err(fs_info, "invalid key type in iref"); ret = -EINVAL; diff --git a/fs/btrfs/tree-checker.c b/fs/btrfs/tree-checker.c index 038dfa8f1788..72d29ab74a01 100644 --- a/fs/btrfs/tree-checker.c +++ b/fs/btrfs/tree-checker.c @@ -1451,6 +1451,9 @@ static int check_extent_item(struct extent_buffer *leaf, } inline_refs += btrfs_shared_data_ref_count(leaf, sref); break; + case BTRFS_EXTENT_OWNER_REF_KEY: + WARN_ON(!btrfs_fs_incompat(fs_info, SIMPLE_QUOTA)); + break; default: extent_err(leaf, slot, "unknown inline ref type: %u", inline_type); diff --git a/include/uapi/linux/btrfs_tree.h b/include/uapi/linux/btrfs_tree.h index 47aca414a41b..eacb26caf3c6 100644 --- a/include/uapi/linux/btrfs_tree.h +++ b/include/uapi/linux/btrfs_tree.h @@ -226,6 +226,8 @@ #define BTRFS_SHARED_DATA_REF_KEY 184 +#define BTRFS_EXTENT_OWNER_REF_KEY 190 + /* * block groups give us hints into the extent allocation trees. Which * blocks are free etc etc @@ -783,6 +785,10 @@ struct btrfs_shared_data_ref { __le32 count; } __attribute__ ((__packed__)); +struct btrfs_extent_owner_ref { + __le64 root_id; +} __attribute__ ((__packed__)); + struct btrfs_extent_inline_ref { __u8 type; __le64 offset;