From e4339d28f640a7c0d92903bcf389a2dfa281270d Mon Sep 17 00:00:00 2001 From: "Yan, Zheng" Date: Tue, 16 Sep 2014 17:50:45 +0800 Subject: libceph: reference counting pagelist this allow pagelist to present data that may be sent multiple times. Signed-off-by: Yan, Zheng Reviewed-by: Sage Weil --- include/linux/ceph/pagelist.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'include/linux/ceph/pagelist.h') diff --git a/include/linux/ceph/pagelist.h b/include/linux/ceph/pagelist.h index 9660d6b0a35d..5f871d84ddce 100644 --- a/include/linux/ceph/pagelist.h +++ b/include/linux/ceph/pagelist.h @@ -2,6 +2,7 @@ #define __FS_CEPH_PAGELIST_H #include +#include struct ceph_pagelist { struct list_head head; @@ -10,6 +11,7 @@ struct ceph_pagelist { size_t room; struct list_head free_list; size_t num_pages_free; + atomic_t refcnt; }; struct ceph_pagelist_cursor { @@ -26,9 +28,10 @@ static inline void ceph_pagelist_init(struct ceph_pagelist *pl) pl->room = 0; INIT_LIST_HEAD(&pl->free_list); pl->num_pages_free = 0; + atomic_set(&pl->refcnt, 1); } -extern int ceph_pagelist_release(struct ceph_pagelist *pl); +extern void ceph_pagelist_release(struct ceph_pagelist *pl); extern int ceph_pagelist_append(struct ceph_pagelist *pl, const void *d, size_t l); -- cgit v1.2.3