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From: Coly Li <colyli@suse.de>
To: axboe@kernel.dk
Cc: linux-bcache@vger.kernel.org, linux-block@vger.kernel.org,
	Jianpeng Ma <jianpeng.ma@intel.com>,
	Qiaowei Ren <qiaowei.ren@intel.com>, Coly Li <colyli@suse.de>
Subject: [PATCH 12/20] bcache: get allocated pages from specific owner
Date: Wed, 10 Feb 2021 13:07:34 +0800
Message-ID: <20210210050742.31237-13-colyli@suse.de> (raw)
In-Reply-To: <20210210050742.31237-1-colyli@suse.de>

From: Jianpeng Ma <jianpeng.ma@intel.com>

This patch implements bch_get_allocated_pages() of the buddy to be used to
get allocated pages from specific owner.

Signed-off-by: Jianpeng Ma <jianpeng.ma@intel.com>
Co-authored-by: Qiaowei Ren <qiaowei.ren@intel.com>
Signed-off-by: Coly Li <colyli@suse.de>
---
 drivers/md/bcache/nvm-pages.c | 39 +++++++++++++++++++++++++++++++++++
 drivers/md/bcache/nvm-pages.h |  6 ++++++
 2 files changed, 45 insertions(+)

diff --git a/drivers/md/bcache/nvm-pages.c b/drivers/md/bcache/nvm-pages.c
index b40bdbac873f..2b079a277e88 100644
--- a/drivers/md/bcache/nvm-pages.c
+++ b/drivers/md/bcache/nvm-pages.c
@@ -374,6 +374,45 @@ void *bch_nvm_alloc_pages(int order, const char *owner_uuid)
 }
 EXPORT_SYMBOL_GPL(bch_nvm_alloc_pages);
 
+struct bch_extent *bch_get_allocated_pages(const char *owner_uuid)
+{
+	struct bch_owner_list *owner_list = find_owner_list(owner_uuid, false);
+	struct bch_nvm_alloced_recs *alloced_recs;
+	struct bch_extent *head = NULL, *e, *tmp;
+	int i;
+
+	if (!owner_list)
+		return NULL;
+
+	for (i = 0; i < only_set->total_namespaces_nr; i++) {
+		struct list_head *l;
+
+		alloced_recs = owner_list->alloced_recs[i];
+
+		if (!alloced_recs || alloced_recs->nr == 0)
+			continue;
+
+		l = alloced_recs->extent_head.next;
+		while (l != &alloced_recs->extent_head) {
+			e = container_of(l, struct bch_extent, list);
+			tmp = kzalloc(sizeof(*tmp), GFP_KERNEL|__GFP_NOFAIL);
+
+			INIT_LIST_HEAD(&tmp->list);
+			tmp->kaddr = e->kaddr;
+			tmp->nr = e->nr;
+
+			if (head)
+				list_add_tail(&tmp->list, &head->list);
+			else
+				head = tmp;
+
+			l = l->next;
+		}
+	}
+	return head;
+}
+EXPORT_SYMBOL_GPL(bch_get_allocated_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 1bc3129f2482..8ffae11c7c61 100644
--- a/drivers/md/bcache/nvm-pages.h
+++ b/drivers/md/bcache/nvm-pages.h
@@ -81,6 +81,7 @@ int bch_nvm_init(void);
 void bch_nvm_exit(void);
 void *bch_nvm_alloc_pages(int order, const char *owner_uuid);
 void bch_nvm_free_pages(void *addr, int order, const char *owner_uuid);
+struct bch_extent *bch_get_allocated_pages(const char *owner_uuid);
 
 #else
 
@@ -101,6 +102,11 @@ static inline void *bch_nvm_alloc_pages(int order, const char *owner_uuid)
 
 static inline void bch_nvm_free_pages(void *addr, int order, const char *owner_uuid) { }
 
+static inline struct bch_extent *bch_get_allocated_pages(const char *owner_uuid)
+{
+	return NULL;
+}
+
 #endif /* CONFIG_BCACHE_NVM_PAGES */
 
 #endif /* _BCACHE_NVM_PAGES_H */
-- 
2.26.2


  parent reply index

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-10  5:07 [PATCH 00/20] bcache patches for Linux v5.12 Coly Li
2021-02-10  5:07 ` [PATCH 01/20] bcache: consider the fragmentation when update the writeback rate Coly Li
2021-02-10  5:07 ` [PATCH 02/20] bcache: Fix register_device_aync typo Coly Li
2021-02-10  5:07 ` [PATCH 03/20] Revert "bcache: Kill btree_io_wq" Coly Li
2021-02-10  5:07 ` [PATCH 04/20] bcache: Give btree_io_wq correct semantics again Coly Li
2021-02-10  5:07 ` [PATCH 05/20] bcache: Move journal work to new flush wq Coly Li
2021-02-10  5:07 ` [PATCH 06/20] bcache: Avoid comma separated statements Coly Li
2021-02-10  5:07 ` [PATCH 07/20] bcache: add initial data structures for nvm pages Coly Li
2021-02-10 15:09   ` Jens Axboe
2021-02-11  3:58     ` Coly Li
2021-02-10  5:07 ` [PATCH 08/20] bcache: initialize the nvm pages allocator Coly Li
2021-02-10  5:07 ` [PATCH 09/20] bcache: initialization of the buddy Coly Li
2021-02-10  5:07 ` [PATCH 10/20] bcache: bch_nvm_alloc_pages() " Coly Li
2021-02-10  5:07 ` [PATCH 11/20] bcache: bch_nvm_free_pages() " Coly Li
2021-02-10  5:07 ` Coly Li [this message]
2021-02-10  5:07 ` [PATCH 13/20] bcache: persist owner info when alloc/free pages Coly Li
2021-02-10  5:07 ` [PATCH 14/20] bcache: use bucket index for SET_GC_MARK() in bch_btree_gc_finish() Coly Li
2021-02-10  5:07 ` [PATCH 15/20] bcache: add BCH_FEATURE_INCOMPAT_NVDIMM_META into incompat feature set Coly Li
2021-02-10  5:07 ` [PATCH 16/20] bcache: initialize bcache journal for NVDIMM meta device Coly Li
2021-02-10  5:07 ` [PATCH 17/20] bcache: support storing bcache journal into " Coly Li
2021-02-18 21:21   ` Nix
2021-02-10  5:07 ` [PATCH 18/20] bcache: read jset from NVDIMM pages for journal replay Coly Li
2021-02-10  5:07 ` [PATCH 19/20] bcache: add sysfs interface register_nvdimm_meta to register NVDIMM meta device Coly Li
2021-02-10  5:07 ` [PATCH 20/20] bcache: only initialize nvm-pages allocator when CONFIG_BCACHE_NVM_PAGES configured Coly Li
2021-02-10 15:11 ` [PATCH 00/20] bcache patches for Linux v5.12 Jens Axboe
2021-02-12 16:09   ` Coly Li

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