Hi, This patch adds support for the FITRIM ioctl, which allows user space tools like fstrim to issue TRIM/DISCARD requests to the underlying device. It takes a fstrim_range structure as a parameter and for every clean segment in the specified range the function blkdev_issue_discard is called. The range is truncated to file system block boundaries. I tested it with a 32 bit and 64 bit kernel. On the 32 bit system CONFIG_LBDAF was disabled so that sector_t was 32 bit. Best regards, Andreas Rohner --- v3->v4 (based on review by Ryusuke Konishi) * Fix integer overflow * Add comment v2->v3 (based on review by Ryusuke Konishi) * Fix integer overflow * Round range to block boundary instead of sector boundary * Move range check to nilfs_sufile_trim_fs() v1->v2 (based on review by Ryusuke Konishi) * Remove upper limit of minlen * Add check for minlen * Round range to sector boundary instead of segment boundary * Fix minor bug * Use kmap_atomic instead of kmap * Move input checks to ioctl.c * Use nilfs_sufile_segment_usages_in_block() -- Andreas Rohner (2): nilfs2: add nilfs_sufile_trim_fs to trim clean segs nilfs2: add FITRIM ioctl support for nilfs2 fs/nilfs2/ioctl.c | 45 ++++++++++++++++ fs/nilfs2/sufile.c | 152 +++++++++++++++++++++++++++++++++++++++++++++++++++++ fs/nilfs2/sufile.h | 1 + 3 files changed, 198 insertions(+) -- 1.9.0 -- To unsubscribe from this list: send the line "unsubscribe linux-nilfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
