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authorKent Overstreet <koverstreet@google.com>2013-06-05 06:21:07 -0700
committerKent Overstreet <koverstreet@google.com>2013-06-26 21:57:23 -0700
commit279afbad4e54acbd61bf88a54a73af3bbfdeb5dd (patch)
treeaefebaa3a7f54049904a275ca3035301603a9be1 /drivers/md/bcache/writeback.h
parent444fc0b6b167ed164e7436621a9d095e042644dd (diff)
bcache: Track dirty data by stripe
To make background writeback aware of raid5/6 stripes, we first need to track the amount of dirty data within each stripe - we do this by breaking up the existing sectors_dirty into per stripe atomic_ts Signed-off-by: Kent Overstreet <koverstreet@google.com>
Diffstat (limited to 'drivers/md/bcache/writeback.h')
-rw-r--r--drivers/md/bcache/writeback.h21
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/md/bcache/writeback.h b/drivers/md/bcache/writeback.h
new file mode 100644
index 00000000000..5ce9771df04
--- /dev/null
+++ b/drivers/md/bcache/writeback.h
@@ -0,0 +1,21 @@
+#ifndef _BCACHE_WRITEBACK_H
+#define _BCACHE_WRITEBACK_H
+
+static inline uint64_t bcache_dev_sectors_dirty(struct bcache_device *d)
+{
+ uint64_t i, ret = 0;
+
+ for (i = 0; i < d->nr_stripes; i++)
+ ret += atomic_read(d->stripe_sectors_dirty + i);
+
+ return ret;
+}
+
+void bcache_dev_sectors_dirty_add(struct cache_set *, unsigned, uint64_t, int);
+void bch_writeback_queue(struct cached_dev *);
+void bch_writeback_add(struct cached_dev *);
+
+void bch_sectors_dirty_init(struct cached_dev *dc);
+void bch_cached_dev_writeback_init(struct cached_dev *);
+
+#endif