From b27f7c0c150f74564b5d4c6c24a03c5226bf6327 Mon Sep 17 00:00:00 2001 From: David Sterba Date: Fri, 22 Jun 2012 06:30:39 -0600 Subject: btrfs: join DEV_STATS ioctls to one Commit c11d2c236cc260b36 (Btrfs: add ioctl to get and reset the device stats) introduced two ioctls doing almost the same thing distinguished by just the ioctl number which encodes "do reset after read". I have suggested http://www.mail-archive.com/linux-btrfs@vger.kernel.org/msg16604.html to implement it via the ioctl args. This hasn't happen, and I think we should use a more clean way to pass flags and should not waste ioctl numbers. CC: Stefan Behrens Signed-off-by: David Sterba --- fs/btrfs/ioctl.h | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'fs/btrfs/ioctl.h') diff --git a/fs/btrfs/ioctl.h b/fs/btrfs/ioctl.h index e440aa6..021c55e 100644 --- a/fs/btrfs/ioctl.h +++ b/fs/btrfs/ioctl.h @@ -285,9 +285,13 @@ enum btrfs_dev_stat_values { BTRFS_DEV_STAT_VALUES_MAX }; +/* Reset statistics after reading; needs SYS_ADMIN capability */ +#define BTRFS_DEV_STATS_RESET (1ULL << 0) + struct btrfs_ioctl_get_dev_stats { __u64 devid; /* in */ __u64 nr_items; /* in/out */ + __u64 flags; /* in/out */ /* out values: */ __u64 values[BTRFS_DEV_STAT_VALUES_MAX]; @@ -361,7 +365,5 @@ struct btrfs_ioctl_get_dev_stats { struct btrfs_ioctl_ino_path_args) #define BTRFS_IOC_GET_DEV_STATS _IOWR(BTRFS_IOCTL_MAGIC, 52, \ struct btrfs_ioctl_get_dev_stats) -#define BTRFS_IOC_GET_AND_RESET_DEV_STATS _IOWR(BTRFS_IOCTL_MAGIC, 53, \ - struct btrfs_ioctl_get_dev_stats) #endif -- cgit v1.1