Add a multipath handler for block_device_operations.report_zones Signed-off-by: John Garry --- include/linux/multipath.h | 2 ++ lib/multipath.c | 25 +++++++++++++++++++++++++ 2 files changed, 27 insertions(+) diff --git a/include/linux/multipath.h b/include/linux/multipath.h index 454826c385923..3846ea8cfd319 100644 --- a/include/linux/multipath.h +++ b/include/linux/multipath.h @@ -74,6 +74,8 @@ struct mpath_head_template { enum mpath_access_state (*get_access_state)(struct mpath_device *); int (*cdev_ioctl)(struct mpath_head *, struct mpath_device *, blk_mode_t mode, unsigned int cmd, unsigned long arg, int srcu_idx); + int (*report_zones)(struct mpath_device *, sector_t sector, + unsigned int nr_zones, struct blk_report_zones_args *args); int (*chr_uring_cmd)(struct mpath_device *, struct io_uring_cmd *ioucmd, unsigned int issue_flags); int (*chr_uring_cmd_iopoll)(struct io_uring_cmd *ioucmd, diff --git a/lib/multipath.c b/lib/multipath.c index 8ee2d12600035..4c57feefff480 100644 --- a/lib/multipath.c +++ b/lib/multipath.c @@ -40,6 +40,30 @@ int mpath_get_iopolicy(char *buf, int iopolicy) } EXPORT_SYMBOL_GPL(mpath_get_iopolicy); +#ifdef CONFIG_BLK_DEV_ZONED +static int mpath_bdev_report_zones(struct gendisk *disk, sector_t sector, + unsigned int nr_zones, struct blk_report_zones_args *args) +{ + struct mpath_disk *mpath_disk = mpath_gendisk_to_disk(disk); + struct mpath_head *mpath_head = mpath_disk->mpath_head; + struct mpath_device *mpath_device; + int srcu_idx, ret = -EWOULDBLOCK; + + if (!mpath_head->mpdt->report_zones) + return -EOPNOTSUPP; + + srcu_idx = srcu_read_lock(&mpath_head->srcu); + mpath_device = mpath_find_path(mpath_head); + if (mpath_device) + ret = mpath_head->mpdt->report_zones(mpath_device, sector, + nr_zones, args); + srcu_read_unlock(&mpath_head->srcu, srcu_idx); + return ret; +} +#else +#define mpath_bdev_report_zones NULL +#endif /* CONFIG_BLK_DEV_ZONED */ + void mpath_synchronize(struct mpath_head *mpath_head) { synchronize_srcu(&mpath_head->srcu); @@ -622,6 +646,7 @@ const struct block_device_operations mpath_ops = { .open = mpath_bdev_open, .release = mpath_bdev_release, .submit_bio = mpath_bdev_submit_bio, + .report_zones = mpath_bdev_report_zones, .pr_ops = &mpath_pr_ops, }; EXPORT_SYMBOL_GPL(mpath_ops); -- 2.43.5