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| author | David Sterba <dsterba@suse.cz> | 2012-06-22 06:30:39 -0600 |
|---|---|---|
| committer | Chris Mason <chris.mason@fusionio.com> | 2012-07-23 15:41:40 -0400 |
| commit | b27f7c0c150f74564b5d4c6c24a03c5226bf6327 (patch) | |
| tree | d26d8b2929a883783666836b9ec6808bdcb0f3fd /fs/btrfs/ioctl.h | |
| parent | a43a21113365e5a9b59efc411da715d910cca87c (diff) | |
| download | linux-b27f7c0c150f74564b5d4c6c24a03c5226bf6327.tar.gz | |
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 <sbehrens@giantdisaster.de> Signed-off-by: David Sterba <dsterba@suse.cz>
Diffstat (limited to 'fs/btrfs/ioctl.h')
| -rw-r--r-- | fs/btrfs/ioctl.h | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/fs/btrfs/ioctl.h b/fs/btrfs/ioctl.h index e440aa653c30..021c55ed8aed 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 |