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| author |   Anand Jain <anand.jain@oracle.com> | 2022-01-12 13:06:01 +0800 |
|---|---|---|
| committer |   David Sterba <dsterba@suse.com> | 2022-03-14 13:13:47 +0100 |
| commit | 4889bc05a96e039b055bbd11438c40bf956f057b (patch) | |
| tree | 161cbf1dca6d039fb8528da67d395e93adbd43ca /fs/btrfs/volumes.h | |
| parent | btrfs: match stale devices by dev_t (diff) | |
| download | wireguard-linux-4889bc05a96e039b055bbd11438c40bf956f057b.tar.xz wireguard-linux-4889bc05a96e039b055bbd11438c40bf956f057b.zip | |
btrfs: add device major-minor info in the struct btrfs_device
Internally it is common to use the major-minor number to identify a
device and, at a few locations in btrfs, we use the major-minor number
to match the device.
So when we identify a new btrfs device through device add or device
replace or device-scan/ready save the device's major-minor (dev_t) in the
struct btrfs_device so that we don't have to call lookup_bdev() again.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to '')
| -rw-r--r-- | fs/btrfs/volumes.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h index 38b898bc5f0e..bd297f23d19e 100644 --- a/fs/btrfs/volumes.h +++ b/fs/btrfs/volumes.h @@ -72,6 +72,11 @@ struct btrfs_device { /* the mode sent to blkdev_get */ fmode_t mode; + /* + * Device's major-minor number. Must be set even if the device is not + * opened (bdev == NULL), unless the device is missing. + */ + dev_t devt; unsigned long dev_state; blk_status_t last_flush_error; |