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| author | Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> | 2010-09-09 02:07:56 +0900 |
|---|---|---|
| committer | Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> | 2010-10-23 09:24:36 +0900 |
| commit | 348fe8da13621b3d14ab2d156e74551611997017 (patch) | |
| tree | 82e60058d2af36e5f6e8bb7851b5b25ba3e72909 /fs/nilfs2/the_nilfs.h | |
| parent | f11459ad7dab9e9eb5a05b8bd3bec338ea8f485d (diff) | |
| download | lwn-348fe8da13621b3d14ab2d156e74551611997017.tar.gz lwn-348fe8da13621b3d14ab2d156e74551611997017.zip | |
nilfs2: simplify life cycle management of nilfs object
This stops pre-allocating nilfs object in nilfs_get_sb routine, and
stops managing its life cycle by reference counting.
nilfs_find_or_create_nilfs() function, nilfs->ns_mount_mutex,
nilfs_objects list, and the reference counter will be removed through
the simplification.
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Diffstat (limited to 'fs/nilfs2/the_nilfs.h')
| -rw-r--r-- | fs/nilfs2/the_nilfs.h | 16 |
1 files changed, 2 insertions, 14 deletions
diff --git a/fs/nilfs2/the_nilfs.h b/fs/nilfs2/the_nilfs.h index 7b43693a69c5..1908dc7bbd8f 100644 --- a/fs/nilfs2/the_nilfs.h +++ b/fs/nilfs2/the_nilfs.h @@ -46,13 +46,10 @@ enum { /** * struct the_nilfs - struct to supervise multiple nilfs mount points * @ns_flags: flags - * @ns_count: reference count - * @ns_list: list head for nilfs_list * @ns_bdev: block device * @ns_bdi: backing dev info * @ns_writer: back pointer to writable nilfs_sb_info * @ns_sem: semaphore for shared states - * @ns_mount_mutex: mutex protecting mount process of nilfs * @ns_writer_sem: semaphore protecting ns_writer attach/detach * @ns_sbh: buffer heads of on-disk super blocks * @ns_sbp: pointers to super block data @@ -94,14 +91,11 @@ enum { */ struct the_nilfs { unsigned long ns_flags; - atomic_t ns_count; - struct list_head ns_list; struct block_device *ns_bdev; struct backing_dev_info *ns_bdi; struct nilfs_sb_info *ns_writer; struct rw_semaphore ns_sem; - struct mutex ns_mount_mutex; struct rw_semaphore ns_writer_sem; /* @@ -239,8 +233,8 @@ static inline int nilfs_sb_will_flip(struct the_nilfs *nilfs) } void nilfs_set_last_segment(struct the_nilfs *, sector_t, u64, __u64); -struct the_nilfs *find_or_create_nilfs(struct block_device *); -void put_nilfs(struct the_nilfs *); +struct the_nilfs *alloc_nilfs(struct block_device *bdev); +void destroy_nilfs(struct the_nilfs *nilfs); int init_nilfs(struct the_nilfs *, struct nilfs_sb_info *, char *); int load_nilfs(struct the_nilfs *, struct nilfs_sb_info *); int nilfs_discard_segments(struct the_nilfs *, __u64 *, size_t); @@ -256,12 +250,6 @@ void nilfs_fall_back_super_block(struct the_nilfs *); void nilfs_swap_super_block(struct the_nilfs *); -static inline void get_nilfs(struct the_nilfs *nilfs) -{ - /* Caller must have at least one reference of the_nilfs. */ - atomic_inc(&nilfs->ns_count); -} - static inline void nilfs_get_root(struct nilfs_root *root) { atomic_inc(&root->count); |