From patchwork Mon Sep 12 19:27:43 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Roesch X-Patchwork-Id: 12974053 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 C87A4C6FA8E for ; Mon, 12 Sep 2022 19:28:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229668AbiILT2O (ORCPT ); Mon, 12 Sep 2022 15:28:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50316 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229901AbiILT2L (ORCPT ); Mon, 12 Sep 2022 15:28:11 -0400 Received: from mx0b-00082601.pphosted.com (mx0b-00082601.pphosted.com [67.231.153.30]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C336F45F40 for ; Mon, 12 Sep 2022 12:28:09 -0700 (PDT) Received: from pps.filterd (m0109331.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.17.1.5/8.17.1.5) with ESMTP id 28CGoER9008591 for ; Mon, 12 Sep 2022 12:28:08 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fb.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding : content-type; s=facebook; bh=fLHHRWaCYItqTxj6TTEtVeulCgfCcm7Qjk1G3l+T3JQ=; b=IsOKQNgzWCXivKJuLo0UOr5pnWthbLYpin/u/VwsazmZ/HHdQ7hC2sGVqHEuhfLvJeDe xV2avAVMAts6cvCyVpREk01lj68gwl6WCfDHI+MYCZKvbSqSX9/WdphswuF3fY3tTrEK KnAVL0bbZSnIcAYNcgwrXAuE+qi6SB8gcz0= Received: from maileast.thefacebook.com ([163.114.130.16]) by mx0a-00082601.pphosted.com (PPS) with ESMTPS id 3jgrdvmdgu-2 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Mon, 12 Sep 2022 12:28:08 -0700 Received: from twshared15978.04.prn5.facebook.com (2620:10d:c0a8:1b::d) by mail.thefacebook.com (2620:10d:c0a8:82::f) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.31; Mon, 12 Sep 2022 12:28:07 -0700 Received: by dev1180.prn1.facebook.com (Postfix, from userid 425415) id F313D208522C; Mon, 12 Sep 2022 12:27:53 -0700 (PDT) From: Stefan Roesch To: , , , CC: , , , Subject: [PATCH v3 03/12] btrfs: make can_nocow_extent nowait compatible Date: Mon, 12 Sep 2022 12:27:43 -0700 Message-ID: <20220912192752.3785061-4-shr@fb.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220912192752.3785061-1-shr@fb.com> References: <20220912192752.3785061-1-shr@fb.com> MIME-Version: 1.0 X-FB-Internal: Safe X-Proofpoint-GUID: OL4Gjymv-EiMm3hD6QI9NpqeIXxwHo6r X-Proofpoint-ORIG-GUID: OL4Gjymv-EiMm3hD6QI9NpqeIXxwHo6r X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.895,Hydra:6.0.528,FMLib:17.11.122.1 definitions=2022-09-12_13,2022-09-12_02,2022-06-22_01 Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org From: Josef Bacik If we have NOWAIT specified on our IOCB and we're writing into a PREALLOC or NOCOW extent then we need to be able to tell can_nocow_extent that we don't want to wait on any locks or metadata IO. Fix can_nocow_extent to allow for NOWAIT. Signed-off-by: Josef Bacik Signed-off-by: Stefan Roesch --- fs/btrfs/ctree.h | 5 +++-- fs/btrfs/extent-tree.c | 5 +++++ fs/btrfs/file-item.c | 4 +++- fs/btrfs/file.c | 2 +- fs/btrfs/inode.c | 16 ++++++++++------ fs/btrfs/relocation.c | 2 +- fs/btrfs/scrub.c | 4 ++-- fs/btrfs/tree-log.c | 6 +++--- 8 files changed, 28 insertions(+), 16 deletions(-) diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index ca59ba6421a9..5cc5394503e0 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -3274,7 +3274,8 @@ int btrfs_csum_file_blocks(struct btrfs_trans_handle *trans, blk_status_t btrfs_csum_one_bio(struct btrfs_inode *inode, struct bio *bio, u64 offset, bool one_ordered); int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, - struct list_head *list, int search_commit); + struct list_head *list, int search_commit, + bool nowait); void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode, const struct btrfs_path *path, struct btrfs_file_extent_item *fi, @@ -3304,7 +3305,7 @@ struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode, u64 start, u64 len); noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, u64 *orig_start, u64 *orig_block_len, - u64 *ram_bytes, bool strict); + u64 *ram_bytes, bool nowait, bool strict); void __btrfs_del_delalloc_inode(struct btrfs_root *root, struct btrfs_inode *inode); diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c index 6914cd8024ba..583ddae3c270 100644 --- a/fs/btrfs/extent-tree.c +++ b/fs/btrfs/extent-tree.c @@ -2220,6 +2220,11 @@ static noinline int check_delayed_ref(struct btrfs_root *root, } if (!mutex_trylock(&head->mutex)) { + if (path->nowait) { + spin_unlock(&delayed_refs->lock); + return -EAGAIN; + } + refcount_inc(&head->refs); spin_unlock(&delayed_refs->lock); diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c index c828f971a346..fcc6ce861409 100644 --- a/fs/btrfs/file-item.c +++ b/fs/btrfs/file-item.c @@ -503,7 +503,8 @@ blk_status_t btrfs_lookup_bio_sums(struct inode *inode, struct bio *bio, u8 *dst } int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, - struct list_head *list, int search_commit) + struct list_head *list, int search_commit, + bool nowait) { struct btrfs_fs_info *fs_info = root->fs_info; struct btrfs_key key; @@ -525,6 +526,7 @@ int btrfs_lookup_csums_range(struct btrfs_root *root, u64 start, u64 end, if (!path) return -ENOMEM; + path->nowait = nowait; if (search_commit) { path->skip_locking = 1; path->reada = READA_FORWARD; diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c index 5a3f6e0d9688..f4aa198f0f87 100644 --- a/fs/btrfs/file.c +++ b/fs/btrfs/file.c @@ -1502,7 +1502,7 @@ int btrfs_check_nocow_lock(struct btrfs_inode *inode, loff_t pos, btrfs_lock_and_flush_ordered_range(inode, lockstart, lockend, NULL); ret = can_nocow_extent(&inode->vfs_inode, lockstart, &num_bytes, - NULL, NULL, NULL, false); + NULL, NULL, NULL, false, false); if (ret <= 0) { ret = 0; btrfs_drew_write_unlock(&root->snapshot_lock); diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 1372210869b1..e0fe2c4b721f 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -1666,7 +1666,7 @@ static noinline int run_delalloc_zoned(struct btrfs_inode *inode, } static noinline int csum_exist_in_range(struct btrfs_fs_info *fs_info, - u64 bytenr, u64 num_bytes) + u64 bytenr, u64 num_bytes, bool nowait) { struct btrfs_root *csum_root = btrfs_csum_root(fs_info, bytenr); struct btrfs_ordered_sum *sums; @@ -1674,7 +1674,8 @@ static noinline int csum_exist_in_range(struct btrfs_fs_info *fs_info, LIST_HEAD(list); ret = btrfs_lookup_csums_range(csum_root, bytenr, - bytenr + num_bytes - 1, &list, 0); + bytenr + num_bytes - 1, &list, 0, + nowait); if (ret == 0 && list_empty(&list)) return 0; @@ -1800,6 +1801,7 @@ static int can_nocow_file_extent(struct btrfs_path *path, u8 extent_type; int can_nocow = 0; int ret = 0; + bool nowait = path->nowait; fi = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_file_extent_item); extent_type = btrfs_file_extent_type(leaf, fi); @@ -1876,7 +1878,8 @@ static int can_nocow_file_extent(struct btrfs_path *path, * Force COW if csums exist in the range. This ensures that csums for a * given extent are either valid or do not exist. */ - ret = csum_exist_in_range(root->fs_info, args->disk_bytenr, args->num_bytes); + ret = csum_exist_in_range(root->fs_info, args->disk_bytenr, args->num_bytes, + nowait); WARN_ON_ONCE(ret > 0 && is_freespace_inode); if (ret != 0) goto out; @@ -7292,7 +7295,7 @@ static bool btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr) */ noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, u64 *orig_start, u64 *orig_block_len, - u64 *ram_bytes, bool strict) + u64 *ram_bytes, bool nowait, bool strict) { struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb); struct can_nocow_file_extent_args nocow_args = { 0 }; @@ -7308,6 +7311,7 @@ noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, path = btrfs_alloc_path(); if (!path) return -ENOMEM; + path->nowait = nowait; ret = btrfs_lookup_file_extent(NULL, root, path, btrfs_ino(BTRFS_I(inode)), offset, 0); @@ -7577,7 +7581,7 @@ static int btrfs_get_blocks_direct_write(struct extent_map **map, block_start = em->block_start + (start - em->start); if (can_nocow_extent(inode, start, &len, &orig_start, - &orig_block_len, &ram_bytes, false) == 1) { + &orig_block_len, &ram_bytes, false, false) == 1) { bg = btrfs_inc_nocow_writers(fs_info, block_start); if (bg) can_nocow = true; @@ -11242,7 +11246,7 @@ static int btrfs_swap_activate(struct swap_info_struct *sis, struct file *file, free_extent_map(em); em = NULL; - ret = can_nocow_extent(inode, start, &len, NULL, NULL, NULL, true); + ret = can_nocow_extent(inode, start, &len, NULL, NULL, NULL, false, true); if (ret < 0) { goto out; } else if (ret) { diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c index 45c02aba2492..dfc3f6c04b13 100644 --- a/fs/btrfs/relocation.c +++ b/fs/btrfs/relocation.c @@ -4339,7 +4339,7 @@ int btrfs_reloc_clone_csums(struct btrfs_inode *inode, u64 file_pos, u64 len) disk_bytenr = file_pos + inode->index_cnt; csum_root = btrfs_csum_root(fs_info, disk_bytenr); ret = btrfs_lookup_csums_range(csum_root, disk_bytenr, - disk_bytenr + len - 1, &list, 0); + disk_bytenr + len - 1, &list, 0, false); if (ret) goto out; diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c index 3afe5fa50a63..1cb3eed8b917 100644 --- a/fs/btrfs/scrub.c +++ b/fs/btrfs/scrub.c @@ -3077,7 +3077,7 @@ static int scrub_raid56_data_stripe_for_parity(struct scrub_ctx *sctx, ret = btrfs_lookup_csums_range(csum_root, extent_start, extent_start + extent_size - 1, - &sctx->csum_list, 1); + &sctx->csum_list, 1, false); if (ret) { scrub_parity_mark_sectors_error(sparity, extent_start, extent_size); @@ -3303,7 +3303,7 @@ static int scrub_simple_mirror(struct scrub_ctx *sctx, if (extent_flags & BTRFS_EXTENT_FLAG_DATA) { ret = btrfs_lookup_csums_range(csum_root, cur_logical, cur_logical + scrub_len - 1, - &sctx->csum_list, 1); + &sctx->csum_list, 1, false); if (ret) break; } diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c index 9205c4a5ca81..8af30dab2a17 100644 --- a/fs/btrfs/tree-log.c +++ b/fs/btrfs/tree-log.c @@ -801,7 +801,7 @@ static noinline int replay_one_extent(struct btrfs_trans_handle *trans, ret = btrfs_lookup_csums_range(root->log_root, csum_start, csum_end - 1, - &ordered_sums, 0); + &ordered_sums, 0, false); if (ret) goto out; /* @@ -4513,7 +4513,7 @@ static noinline int copy_items(struct btrfs_trans_handle *trans, disk_bytenr += extent_offset; ret = btrfs_lookup_csums_range(csum_root, disk_bytenr, disk_bytenr + extent_num_bytes - 1, - &ordered_sums, 0); + &ordered_sums, 0, false); if (ret) goto out; @@ -4709,7 +4709,7 @@ static int log_extent_csums(struct btrfs_trans_handle *trans, ret = btrfs_lookup_csums_range(csum_root, em->block_start + csum_offset, em->block_start + csum_offset + - csum_len - 1, &ordered_sums, 0); + csum_len - 1, &ordered_sums, 0, false); if (ret) return ret;