On 6/22/21 6:54 PM, Hannes Reinecke wrote:

On 6/15/21 7:49 AM, Coly Li wrote:

quoted

From: Jianpeng Ma <redacted>

This patch implements bch_get_allocated_pages() of the buddy to be used to

buddy allocator

Copied. Will be updated in next post.

quoted

get allocated pages from specific owner.

Signed-off-by: Jianpeng Ma <redacted>
Co-developed-by: Qiaowei Ren <redacted>
Signed-off-by: Qiaowei Ren <redacted>
Signed-off-by: Coly Li <redacted>
---
 drivers/md/bcache/nvm-pages.c | 6 ++++++
 drivers/md/bcache/nvm-pages.h | 5 +++++
 2 files changed, 11 insertions(+)

diff --git a/drivers/md/bcache/nvm-pages.c b/drivers/md/bcache/nvm-pages.c
index 74d08950c67c..42b0504d9564 100644
--- a/drivers/md/bcache/nvm-pages.c
+++ b/drivers/md/bcache/nvm-pages.c

@@ -397,6 +397,12 @@ void *bch_nvm_alloc_pages(int order, const char *owner_uuid)
 }
 EXPORT_SYMBOL_GPL(bch_nvm_alloc_pages);
 
+struct bch_nvm_pages_owner_head *bch_get_allocated_pages(const char *owner_uuid)
+{
+	return find_owner_head(owner_uuid, false);
+}
+EXPORT_SYMBOL_GPL(bch_get_allocated_pages);
+
 #define BCH_PGOFF_TO_KVADDR(pgoff) ((void *)((unsigned long)pgoff << PAGE_SHIFT))
 
 static int init_owner_info(struct bch_nvm_namespace *ns)

diff --git a/drivers/md/bcache/nvm-pages.h b/drivers/md/bcache/nvm-pages.h
index 0ca699166855..c763bf2e2721 100644
--- a/drivers/md/bcache/nvm-pages.h
+++ b/drivers/md/bcache/nvm-pages.h

@@ -64,6 +64,7 @@ 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_nvm_pages_owner_head *bch_get_allocated_pages(const char *owner_uuid);
 
 #else
 

@@ -81,6 +82,10 @@ static inline void *bch_nvm_alloc_pages(int order, const char *owner_uuid)
 	return NULL;
 }
 static inline void bch_nvm_free_pages(void *addr, int order, const char *owner_uuid) { }
+static inline struct bch_nvm_pages_owner_head *bch_get_allocated_pages(const char *owner_uuid)
+{
+	return NULL;
+}
 
 #endif /* CONFIG_BCACHE_NVM_PAGES */
 

Reviewed-by: Hannes Reinecke <hare@suse.de>

Thanks for your review.

Coly Li