Changes v1-v2: - Remove restriction that BTRFS_IOC_GET_DEVICE_STATS is a privileged operation - Cast u64 to unsigned long long for printf()
Changes v2-v3: - Rebased on Chris' current master The goal is to detect when drives start to get an increased error rate, when drives should be replaced soon. Therefore statistic counters are added that count IO errors (read, write and flush). Additionally, the software detected errors like checksum errors and corrupted blocks are counted. An ioctl interface is added to get the device statistic counters. A second ioctl is added to atomically get and reset these counters. The device statistics are written into the device tree with each transaction commit. Only modified statistics are written. When a filesystem is mounted, the device statistics for each involved device are read from the device tree and used to initialize the counters. A patch for the btrfs-progs world will also be sent. Stefan Behrens (3): Btrfs: add device counters for detected IO and checksum errors Btrfs: add ioctl to get and reset the device stats Btrfs: read device stats on mount, write modified ones during commit fs/btrfs/ctree.h | 51 ++++++++ fs/btrfs/disk-io.c | 25 +++- fs/btrfs/extent_io.c | 27 +++- fs/btrfs/ioctl.c | 26 ++++ fs/btrfs/ioctl.h | 27 ++++ fs/btrfs/print-tree.c | 3 + fs/btrfs/scrub.c | 72 ++++++++--- fs/btrfs/transaction.c | 4 + fs/btrfs/volumes.c | 335 +++++++++++++++++++++++++++++++++++++++++++++++- fs/btrfs/volumes.h | 43 +++++++ 10 files changed, 588 insertions(+), 25 deletions(-) -- 1.7.10.2 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
