From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3B8C6C4332D for ; Wed, 10 Feb 2021 05:09:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 136F464E2A for ; Wed, 10 Feb 2021 05:09:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230497AbhBJFJe (ORCPT ); Wed, 10 Feb 2021 00:09:34 -0500 Received: from mx2.suse.de ([195.135.220.15]:40752 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230470AbhBJFJ3 (ORCPT ); Wed, 10 Feb 2021 00:09:29 -0500 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id 620DAAFE6; Wed, 10 Feb 2021 05:08:20 +0000 (UTC) From: Coly Li To: axboe@kernel.dk Cc: linux-bcache@vger.kernel.org, linux-block@vger.kernel.org, Jianpeng Ma , Qiaowei Ren , Coly Li Subject: [PATCH 10/20] bcache: bch_nvm_alloc_pages() of the buddy Date: Wed, 10 Feb 2021 13:07:32 +0800 Message-Id: <20210210050742.31237-11-colyli@suse.de> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20210210050742.31237-1-colyli@suse.de> References: <20210210050742.31237-1-colyli@suse.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org From: Jianpeng Ma This patch implements the bch_nvm_alloc_pages() of the buddy. Signed-off-by: Jianpeng Ma Co-authored-by: Qiaowei Ren Signed-off-by: Coly Li --- drivers/md/bcache/nvm-pages.c | 121 ++++++++++++++++++++++++++++++++++ drivers/md/bcache/nvm-pages.h | 6 ++ 2 files changed, 127 insertions(+) diff --git a/drivers/md/bcache/nvm-pages.c b/drivers/md/bcache/nvm-pages.c index 7efb99c0fc07..0b992c17ce47 100644 --- a/drivers/md/bcache/nvm-pages.c +++ b/drivers/md/bcache/nvm-pages.c @@ -124,6 +124,127 @@ static inline void remove_owner_space(struct bch_nvm_namespace *ns, bitmap_set(ns->pages_bitmap, pgoff, nr); } +/* If not found, it will create if create == true */ +static struct bch_owner_list *find_owner_list(const char *owner_uuid, bool create) +{ + struct bch_owner_list *owner_list; + int i; + + for (i = 0; i < only_set->owner_list_used; i++) { + if (!memcmp(owner_uuid, only_set->owner_lists[i]->owner_uuid, 16)) + return only_set->owner_lists[i]; + } + + if (create) { + owner_list = alloc_owner_list(owner_uuid, NULL, only_set->total_namespaces_nr); + only_set->owner_lists[only_set->owner_list_used++] = owner_list; + return owner_list; + } else + return NULL; +} + +static struct bch_nvm_alloced_recs *find_nvm_alloced_recs(struct bch_owner_list *owner_list, + struct bch_nvm_namespace *ns, bool create) +{ + int position = ns->sb.this_namespace_nr; + + if (create && !owner_list->alloced_recs[position]) { + struct bch_nvm_alloced_recs *alloced_recs = + kzalloc(sizeof(*alloced_recs), GFP_KERNEL|__GFP_NOFAIL); + + alloced_recs->ns = ns; + INIT_LIST_HEAD(&alloced_recs->extent_head); + owner_list->alloced_recs[position] = alloced_recs; + return alloced_recs; + } else + return owner_list->alloced_recs[position]; +} + +static inline void *extent_end_addr(struct bch_extent *extent) +{ + return extent->kaddr + ((u64)(extent->nr) << PAGE_SHIFT); +} + +static void add_extent(struct bch_nvm_alloced_recs *alloced_recs, void *addr, int order) +{ + struct list_head *list = alloced_recs->extent_head.next; + struct bch_extent *extent, *tmp; + void *end_addr = addr + (((u64)1 << order) << PAGE_SHIFT); + + while (list != &alloced_recs->extent_head) { + extent = container_of(list, struct bch_extent, list); + if (addr > extent->kaddr) { + list = list->next; + continue; + } + break; + } + + extent = kzalloc(sizeof(*extent), GFP_KERNEL); + extent->kaddr = addr; + extent->nr = 1 << order; + list_add_tail(&extent->list, list); + alloced_recs->nr++; +} + +void *bch_nvm_alloc_pages(int order, const char *owner_uuid) +{ + void *kaddr = NULL; + struct bch_owner_list *owner_list; + struct bch_nvm_alloced_recs *alloced_recs; + int i, j; + + mutex_lock(&only_set->lock); + owner_list = find_owner_list(owner_uuid, true); + + for (j = 0; j < only_set->total_namespaces_nr; j++) { + struct bch_nvm_namespace *ns = only_set->nss[j]; + + if (!ns || (ns->free < (1 << order))) + continue; + + for (i = order; i < BCH_MAX_ORDER; i++) { + struct list_head *list; + struct page *page, *buddy_page; + + if (list_empty(&ns->free_area[i])) + continue; + + list = ns->free_area[i].next; + page = container_of((void *)list, struct page, zone_device_data); + + list_del(list); + + while (i != order) { + buddy_page = nvm_vaddr_to_page(ns, + nvm_pgoff_to_vaddr(ns, page->index + (1 << (i - 1)))); + set_page_private(buddy_page, i - 1); + buddy_page->index = page->index + (1 << (i - 1)); + __SetPageBuddy(buddy_page); + list_add((struct list_head *)&buddy_page->zone_device_data, + &ns->free_area[i - 1]); + i--; + } + + set_page_private(page, order); + __ClearPageBuddy(page); + ns->free -= 1 << order; + kaddr = nvm_pgoff_to_vaddr(ns, page->index); + break; + } + + if (i != BCH_MAX_ORDER) { + alloced_recs = find_nvm_alloced_recs(owner_list, ns, true); + add_extent(alloced_recs, kaddr, order); + break; + } + } + + mutex_unlock(&only_set->lock); + return kaddr; +} +EXPORT_SYMBOL_GPL(bch_nvm_alloc_pages); + static int init_owner_info(struct bch_nvm_namespace *ns) { struct bch_owner_list_head *owner_list_head; diff --git a/drivers/md/bcache/nvm-pages.h b/drivers/md/bcache/nvm-pages.h index ed3431daae06..10157d993126 100644 --- a/drivers/md/bcache/nvm-pages.h +++ b/drivers/md/bcache/nvm-pages.h @@ -79,6 +79,7 @@ extern struct bch_nvm_set *only_set; struct bch_nvm_namespace *bch_register_namespace(const char *dev_path); int bch_nvm_init(void); void bch_nvm_exit(void); +void *bch_nvm_alloc_pages(int order, const char *owner_uuid); #else @@ -92,6 +93,11 @@ static inline int bch_nvm_init(void) } static inline void bch_nvm_exit(void) { } +static inline void *bch_nvm_alloc_pages(int order, const char *owner_uuid) +{ + return NULL; +} + #endif /* CONFIG_BCACHE_NVM_PAGES */ #endif /* _BCACHE_NVM_PAGES_H */ -- 2.26.2