diff options
Diffstat (limited to 'include/linux/writeback.h')
| -rw-r--r-- | include/linux/writeback.h | 30 |
1 files changed, 18 insertions, 12 deletions
diff --git a/include/linux/writeback.h b/include/linux/writeback.h index 5de884cd6a7c..c35b96eb6a90 100644 --- a/include/linux/writeback.h +++ b/include/linux/writeback.h @@ -27,22 +27,29 @@ static inline int current_is_pdflush(void) * fs/fs-writeback.c */ enum writeback_sync_modes { - WB_SYNC_NONE = 0, /* Don't wait on anything */ - WB_SYNC_LAST = 1, /* Wait on the last-written mapping */ - WB_SYNC_ALL = 2, /* Wait on every mapping */ - WB_SYNC_HOLD = 3, /* Hold the inode on sb_dirty for sys_sync() */ + WB_SYNC_NONE, /* Don't wait on anything */ + WB_SYNC_ALL, /* Wait on every mapping */ + WB_SYNC_HOLD, /* Hold the inode on sb_dirty for sys_sync() */ }; -void writeback_unlocked_inodes(int *nr_to_write, - enum writeback_sync_modes sync_mode, - unsigned long *older_than_this); +/* + * A control structure which tells the writeback code what to do + */ +struct writeback_control { + struct backing_dev_info *bdi; /* If !NULL, only write back this + queue */ + enum writeback_sync_modes sync_mode; + unsigned long *older_than_this; /* If !NULL, only write back inodes + older than this */ + long nr_to_write; /* Write this many pages, and decrement + this for each page written */ +}; + +void writeback_inodes(struct writeback_control *wbc); void wake_up_inode(struct inode *inode); void __wait_on_inode(struct inode * inode); void sync_inodes_sb(struct super_block *, int wait); void sync_inodes(int wait); -void writeback_backing_dev(struct backing_dev_info *bdi, int *nr_to_write, - enum writeback_sync_modes sync_mode, - unsigned long *older_than_this); /* writeback.h requires fs.h; it, too, is not included from here. */ static inline void wait_on_inode(struct inode *inode) @@ -57,7 +64,6 @@ static inline void wait_on_inode(struct inode *inode) /* These 5 are exported to sysctl. */ extern int dirty_background_ratio; extern int dirty_async_ratio; -extern int dirty_sync_ratio; extern int dirty_writeback_centisecs; extern int dirty_expire_centisecs; @@ -65,7 +71,7 @@ extern int dirty_expire_centisecs; void balance_dirty_pages(struct address_space *mapping); void balance_dirty_pages_ratelimited(struct address_space *mapping); int pdflush_operation(void (*fn)(unsigned long), unsigned long arg0); -int do_writepages(struct address_space *mapping, int *nr_to_write); +int do_writepages(struct address_space *mapping, struct writeback_control *wbc); /* pdflush.c */ extern int nr_pdflush_threads; /* Global so it can be exported to sysctl |