From: Jianpeng Ma <jianpeng.ma@xxxxxxxxx> 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@xxxxxxxxx> Co-authored-by: Qiaowei Ren <qiaowei.ren@xxxxxxxxx> Signed-off-by: Coly Li <colyli@xxxxxxx> --- 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