linux-bcache.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Qiaowei Ren <qiaowei.ren@intel.com>
To: Coly Li <colyli@suse.de>
Cc: Qiaowei Ren <qiaowei.ren@intel.com>,
	Jianpeng Ma <jianpeng.ma@intel.com>,
	linux-bcache@vger.kernel.org
Subject: [RFC PATCH v6 6/7] bcache: get allocated pages from specific owner
Date: Mon,  8 Feb 2021 09:26:20 -0500	[thread overview]
Message-ID: <20210208142621.76815-7-qiaowei.ren@intel.com> (raw)
In-Reply-To: <20210208142621.76815-1-qiaowei.ren@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>
Signed-off-by: Qiaowei Ren <qiaowei.ren@intel.com>
---
 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 */
-- 
2.17.1


  parent reply	other threads:[~2021-02-08  6:46 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-08 14:26 [RFC PATCH v6 0/7] nvm page allocator for bcache Qiaowei Ren
2021-02-08 13:49 ` Coly Li
2021-02-09  2:30   ` Ren, Qiaowei
2021-02-09  3:26     ` Coly Li
2021-02-08 14:26 ` [RFC PATCH v6 1/7] bcache: add initial data structures for nvm pages Qiaowei Ren
2021-02-08 14:26 ` [RFC PATCH v6 2/7] bcache: initialize the nvm pages allocator Qiaowei Ren
2021-02-08 14:26 ` [RFC PATCH v6 3/7] bcache: initialization of the buddy Qiaowei Ren
2021-02-08 14:26 ` [RFC PATCH v6 4/7] bcache: bch_nvm_alloc_pages() " Qiaowei Ren
2021-02-08 14:26 ` [RFC PATCH v6 5/7] bcache: bch_nvm_free_pages() " Qiaowei Ren
2021-02-08 14:26 ` Qiaowei Ren [this message]
2021-02-08 14:26 ` [RFC PATCH v6 7/7] bcache: persist owner info when alloc/free pages Qiaowei Ren

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210208142621.76815-7-qiaowei.ren@intel.com \
    --to=qiaowei.ren@intel.com \
    --cc=colyli@suse.de \
    --cc=jianpeng.ma@intel.com \
    --cc=linux-bcache@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).