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| author | Yan, Zheng <zyan@redhat.com> | 2014-09-16 17:50:45 +0800 |
|---|---|---|
| committer | Sage Weil <sage@redhat.com> | 2014-10-14 12:56:48 -0700 |
| commit | e4339d28f640a7c0d92903bcf389a2dfa281270d (patch) | |
| tree | 428c172af1081d29613732cdcf7801f958be358f /include/linux/ceph | |
| parent | 0abb43dcacb52145aa265f82c914375d59dfe2da (diff) | |
| download | blackbird-op-linux-e4339d28f640a7c0d92903bcf389a2dfa281270d.tar.gz blackbird-op-linux-e4339d28f640a7c0d92903bcf389a2dfa281270d.zip | |
libceph: reference counting pagelist
this allow pagelist to present data that may be sent multiple times.
Signed-off-by: Yan, Zheng <zyan@redhat.com>
Reviewed-by: Sage Weil <sage@redhat.com>
Diffstat (limited to 'include/linux/ceph')
| -rw-r--r-- | include/linux/ceph/pagelist.h | 5 |
1 files changed, 4 insertions, 1 deletions
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 <linux/list.h> +#include <linux/atomic.h> 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); |
