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a=xqWC_Br6kY4A:10 a=HzLeVaNsDn8A:10 a=GoEa3M9JfhUA:10 a=VkNPw1HP01LnGYTKEx00:22 a=Mpw57Om8IfrbqaoTuvik:22 a=GgsMoib0sEa3-_RKJdDe:22 a=yPCof4ZbAAAA:8 a=cYe3JGuVRXpH4XBa9ckA:9 cc=ntf awl=host:12262 X-Proofpoint-ORIG-GUID: taxJfzMH1KxQjzT-4eI9riQUICC-G81C X-Proofpoint-GUID: taxJfzMH1KxQjzT-4eI9riQUICC-G81C X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMjI1MDE0OCBTYWx0ZWRfX0izk9mM5ZRnR tnK/gqaN6pNJwygPb9IjdxWgwIL2XyXdiT1qG6e2AOMxxe9hsgoN/EsfO6Tf36iutkV2xjMrzDq 3d0m/t4clwK9PnVA2CZsYEdVHe9vL5xy20PTL3cYFVPc+CqlqakinOWjptn1gRSq7csEjXNqFlk 9+WByzTAXD7Vzx4ol7kal+PQcEEKnfxLYN5/rRhy3Cm6e0zCCat/Q1Esho7xWOrUs1M/sKZlIn3 fPb5DdNtp/r8z2tggTOKr6C9GrzvN1x9sElFitCRrflMkrC5PDr+0qHPHAgU7hdtKbEr/PJsnnK TrVMPUG7e3ml90AuUioQPmFu4VArj8nQnE+D+UJVYjYHKXZyUde/A6pRVWBnLKDqTIm19sFVo+M cwIOCrxDTHAz7rXIi3JOvgQh6IDTH5OpGrzUxXx+nio6tHSVDRE5IdMSFQUISpgVjecDDIuTjzM 1PkqpfNWg8cPPLflszkg94gdTkvrpiqsoy7iB/V4= Content-Type: text/plain; charset="utf-8" Add mpath_bdev_get_unique_id() as a multipath block device .get_unique_id handler. Signed-off-by: John Garry --- include/linux/multipath.h | 2 ++ lib/multipath.c | 17 +++++++++++++++++ 2 files changed, 19 insertions(+) diff --git a/include/linux/multipath.h b/include/linux/multipath.h index 40dda6a914c5f..1aa70ae11a195 100644 --- a/include/linux/multipath.h +++ b/include/linux/multipath.h @@ -86,6 +86,8 @@ struct mpath_head_template { unsigned int poll_flags); enum mpath_iopolicy_e (*get_iopolicy)(struct mpath_head *); struct bio *(*clone_bio)(struct bio *); + int (*get_unique_id)(struct mpath_device *, u8 id[16], + enum blk_unique_id type); const struct mpath_pr_ops *pr_ops; const struct attribute_group **device_groups; }; diff --git a/lib/multipath.c b/lib/multipath.c index 192ecd886b958..bba13b18215ee 100644 --- a/lib/multipath.c +++ b/lib/multipath.c @@ -496,6 +496,22 @@ static void mpath_bdev_release(struct gendisk *disk) mpath_put_disk(mpath_disk); } =20 +static int mpath_bdev_get_unique_id(struct gendisk *disk, u8 id[16], + enum blk_unique_id type) +{ + struct mpath_disk *mpath_disk =3D mpath_gendisk_to_disk(disk); + struct mpath_head *mpath_head =3D mpath_disk->mpath_head; + int srcu_idx, ret =3D -EWOULDBLOCK; + struct mpath_device *mpath_device; + + srcu_idx =3D srcu_read_lock(&mpath_head->srcu); + mpath_device =3D mpath_find_path(mpath_head); + if (mpath_device) + ret =3D mpath_head->mpdt->get_unique_id(mpath_device, id, type); + srcu_read_unlock(&mpath_head->srcu, srcu_idx); + + return ret; +} static int mpath_bdev_ioctl(struct block_device *bdev, blk_mode_t mode, unsigned int cmd, unsigned long arg) { @@ -704,6 +720,7 @@ const struct block_device_operations mpath_ops =3D { .submit_bio =3D mpath_bdev_submit_bio, .ioctl =3D mpath_bdev_ioctl, .compat_ioctl =3D blkdev_compat_ptr_ioctl, + .get_unique_id =3D mpath_bdev_get_unique_id, .report_zones =3D mpath_bdev_report_zones, .getgeo =3D mpath_bdev_getgeo, .pr_ops =3D &mpath_pr_ops, --=20 2.43.5