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Diffstat (limited to 'drivers/md/bcache/writeback.h')
-rw-r--r--drivers/md/bcache/writeback.h46
1 files changed, 36 insertions, 10 deletions
diff --git a/drivers/md/bcache/writeback.h b/drivers/md/bcache/writeback.h
index c91f61bb95b..c9ddcf4614b 100644
--- a/drivers/md/bcache/writeback.h
+++ b/drivers/md/bcache/writeback.h
@@ -14,20 +14,27 @@ static inline uint64_t bcache_dev_sectors_dirty(struct bcache_device *d)
return ret;
}
-static inline bool bcache_dev_stripe_dirty(struct bcache_device *d,
+static inline unsigned offset_to_stripe(struct bcache_device *d,
+ uint64_t offset)
+{
+ do_div(offset, d->stripe_size);
+ return offset;
+}
+
+static inline bool bcache_dev_stripe_dirty(struct cached_dev *dc,
uint64_t offset,
unsigned nr_sectors)
{
- uint64_t stripe = offset >> d->stripe_size_bits;
+ unsigned stripe = offset_to_stripe(&dc->disk, offset);
while (1) {
- if (atomic_read(d->stripe_sectors_dirty + stripe))
+ if (atomic_read(dc->disk.stripe_sectors_dirty + stripe))
return true;
- if (nr_sectors <= 1 << d->stripe_size_bits)
+ if (nr_sectors <= dc->disk.stripe_size)
return false;
- nr_sectors -= 1 << d->stripe_size_bits;
+ nr_sectors -= dc->disk.stripe_size;
stripe++;
}
}
@@ -38,12 +45,12 @@ static inline bool should_writeback(struct cached_dev *dc, struct bio *bio,
unsigned in_use = dc->disk.c->gc_stats.in_use;
if (cache_mode != CACHE_MODE_WRITEBACK ||
- atomic_read(&dc->disk.detaching) ||
+ test_bit(BCACHE_DEV_DETACHING, &dc->disk.flags) ||
in_use > CUTOFF_WRITEBACK_SYNC)
return false;
if (dc->partial_stripes_expensive &&
- bcache_dev_stripe_dirty(&dc->disk, bio->bi_sector,
+ bcache_dev_stripe_dirty(dc, bio->bi_sector,
bio_sectors(bio)))
return true;
@@ -54,11 +61,30 @@ static inline bool should_writeback(struct cached_dev *dc, struct bio *bio,
in_use <= CUTOFF_WRITEBACK;
}
+static inline void bch_writeback_queue(struct cached_dev *dc)
+{
+ wake_up_process(dc->writeback_thread);
+}
+
+static inline void bch_writeback_add(struct cached_dev *dc)
+{
+ if (!atomic_read(&dc->has_dirty) &&
+ !atomic_xchg(&dc->has_dirty, 1)) {
+ atomic_inc(&dc->count);
+
+ if (BDEV_STATE(&dc->sb) != BDEV_STATE_DIRTY) {
+ SET_BDEV_STATE(&dc->sb, BDEV_STATE_DIRTY);
+ /* XXX: should do this synchronously */
+ bch_write_bdev_super(dc, NULL);
+ }
+
+ bch_writeback_queue(dc);
+ }
+}
+
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 *);
+int bch_cached_dev_writeback_init(struct cached_dev *);
#endif