btrfs: cleanup device states define BTRFS_DEV_STATE_FLUSH_SENT

Currently device state is being managed by each individual int
variable such as struct btrfs_device::is_tgtdev_for_dev_replace.
Instead of that declare btrfs_device::dev_state
BTRFS_DEV_STATE_FLUSH_SENT and use the bit operations.

Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 4f7d2a3..392d6cd 100644 (file)
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -3348,7 +3348,7 @@ static void write_dev_flush(struct btrfs_device *device)
        bio->bi_private = &device->flush_wait;
 
        btrfsic_submit_bio(bio);
-       device->flush_bio_sent = 1;
+       set_bit(BTRFS_DEV_STATE_FLUSH_SENT, &device->dev_state);
 }
 
 /*
@@ -3358,10 +3358,10 @@ static blk_status_t wait_dev_flush(struct btrfs_device *device)
 {
        struct bio *bio = device->flush_bio;
 
-       if (!device->flush_bio_sent)
+       if (!test_bit(BTRFS_DEV_STATE_FLUSH_SENT, &device->dev_state))
                return BLK_STS_OK;
 
-       device->flush_bio_sent = 0;
+       clear_bit(BTRFS_DEV_STATE_FLUSH_SENT, &device->dev_state);
        wait_for_completion_io(&device->flush_wait);
 
        return bio->bi_status;

diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index 2ac1231..3e3ae44 100644 (file)
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -51,6 +51,7 @@ struct btrfs_pending_bios {
 #define BTRFS_DEV_STATE_IN_FS_METADATA (1)
 #define BTRFS_DEV_STATE_MISSING                (2)
 #define BTRFS_DEV_STATE_REPLACE_TGT    (3)
+#define BTRFS_DEV_STATE_FLUSH_SENT     (4)
 
 struct btrfs_device {
        struct list_head dev_list;