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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>
This commit is contained in:
Anand Jain 2017-12-04 12:54:56 +08:00 committed by David Sterba
parent 401e29c124
commit 1c3063b6db
2 changed files with 4 additions and 3 deletions
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6
fs/btrfs/disk-io.c
View File

@ -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;

1
fs/btrfs/volumes.h
View File

@ -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;