diff options
author | Artem Bityutskiy <Artem.Bityutskiy@nokia.com> | 2009-09-21 12:09:22 +0300 |
---|---|---|
committer | Artem Bityutskiy <Artem.Bityutskiy@nokia.com> | 2009-09-21 12:09:22 +0300 |
commit | 7cce2f4cb7f5f641f78c8e3eea4e7b1b96cb71c0 (patch) | |
tree | b064d077928cf224660ab1e1841cdab2c9fd8b08 /fs/nilfs2/the_nilfs.h | |
parent | e055f7e873d900925c222cf2d1ec955af4a9ca90 (diff) | |
parent | ebc79c4f8da0f92efa968e0328f32334a2ce80cf (diff) |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 into linux-next
Conflicts:
fs/ubifs/super.c
Merge the upstream tree in order to resolve a conflict with the
per-bdi writeback changes from the linux-2.6-block tree.
Diffstat (limited to 'fs/nilfs2/the_nilfs.h')
-rw-r--r-- | fs/nilfs2/the_nilfs.h | 45 |
1 files changed, 23 insertions, 22 deletions
diff --git a/fs/nilfs2/the_nilfs.h b/fs/nilfs2/the_nilfs.h index e8adbffc626..20abd55881e 100644 --- a/fs/nilfs2/the_nilfs.h +++ b/fs/nilfs2/the_nilfs.h @@ -37,6 +37,7 @@ enum { THE_NILFS_LOADED, /* Roll-back/roll-forward has done and the latest checkpoint was loaded */ THE_NILFS_DISCONTINUED, /* 'next' pointer chain has broken */ + THE_NILFS_GC_RUNNING, /* gc process is running */ }; /** @@ -50,8 +51,7 @@ enum { * @ns_sem: semaphore for shared states * @ns_super_sem: semaphore for global operations across super block instances * @ns_mount_mutex: mutex protecting mount process of nilfs - * @ns_writer_mutex: mutex protecting ns_writer attach/detach - * @ns_writer_refcount: number of referrers on ns_writer + * @ns_writer_sem: semaphore protecting ns_writer attach/detach * @ns_current: back pointer to current mount * @ns_sbh: buffer heads of on-disk super blocks * @ns_sbp: pointers to super block data @@ -100,8 +100,7 @@ struct the_nilfs { struct rw_semaphore ns_sem; struct rw_semaphore ns_super_sem; struct mutex ns_mount_mutex; - struct mutex ns_writer_mutex; - atomic_t ns_writer_refcount; + struct rw_semaphore ns_writer_sem; /* * components protected by ns_super_sem @@ -197,11 +196,26 @@ static inline int nilfs_##name(struct the_nilfs *nilfs) \ THE_NILFS_FNS(INIT, init) THE_NILFS_FNS(LOADED, loaded) THE_NILFS_FNS(DISCONTINUED, discontinued) +THE_NILFS_FNS(GC_RUNNING, gc_running) /* Minimum interval of periodical update of superblocks (in seconds) */ #define NILFS_SB_FREQ 10 #define NILFS_ALTSB_FREQ 60 /* spare superblock */ +static inline int nilfs_sb_need_update(struct the_nilfs *nilfs) +{ + u64 t = get_seconds(); + return t < nilfs->ns_sbwtime[0] || + t > nilfs->ns_sbwtime[0] + NILFS_SB_FREQ; +} + +static inline int nilfs_altsb_need_update(struct the_nilfs *nilfs) +{ + u64 t = get_seconds(); + struct nilfs_super_block **sbp = nilfs->ns_sbp; + return sbp[1] && t > nilfs->ns_sbwtime[1] + NILFS_ALTSB_FREQ; +} + 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 *); @@ -221,39 +235,26 @@ static inline void get_nilfs(struct the_nilfs *nilfs) atomic_inc(&nilfs->ns_count); } -static inline struct nilfs_sb_info *nilfs_get_writer(struct the_nilfs *nilfs) -{ - if (atomic_inc_and_test(&nilfs->ns_writer_refcount)) - mutex_lock(&nilfs->ns_writer_mutex); - return nilfs->ns_writer; -} - -static inline void nilfs_put_writer(struct the_nilfs *nilfs) -{ - if (atomic_add_negative(-1, &nilfs->ns_writer_refcount)) - mutex_unlock(&nilfs->ns_writer_mutex); -} - static inline void nilfs_attach_writer(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi) { - mutex_lock(&nilfs->ns_writer_mutex); + down_write(&nilfs->ns_writer_sem); nilfs->ns_writer = sbi; - mutex_unlock(&nilfs->ns_writer_mutex); + up_write(&nilfs->ns_writer_sem); } static inline void nilfs_detach_writer(struct the_nilfs *nilfs, struct nilfs_sb_info *sbi) { - mutex_lock(&nilfs->ns_writer_mutex); + down_write(&nilfs->ns_writer_sem); if (sbi == nilfs->ns_writer) nilfs->ns_writer = NULL; - mutex_unlock(&nilfs->ns_writer_mutex); + up_write(&nilfs->ns_writer_sem); } static inline void nilfs_put_sbinfo(struct nilfs_sb_info *sbi) { - if (!atomic_dec_and_test(&sbi->s_count)) + if (atomic_dec_and_test(&sbi->s_count)) kfree(sbi); } |