Convert xen/blkback to use bdev_open_by_dev() and pass the
handle around.
CC: xen-devel@xxxxxxxxxxxxxxxxxxxx
Acked-by: Christoph Hellwig <hch@xxxxxx>
Signed-off-by: Jan Kara <jack@xxxxxxx>
---
drivers/block/xen-blkback/blkback.c | 4 +--
drivers/block/xen-blkback/common.h | 4 +--
drivers/block/xen-blkback/xenbus.c | 40 +++++++++++++++--------------
3 files changed, 25 insertions(+), 23 deletions(-)
diff --git a/drivers/block/xen-blkback/blkback.c b/drivers/block/xen-blkback/blkback.c
index c362f4ad80ab..4defd7f387c7 100644
--- a/drivers/block/xen-blkback/blkback.c
+++ b/drivers/block/xen-blkback/blkback.c
@@ -465,7 +465,7 @@ static int xen_vbd_translate(struct phys_req *req, struct xen_blkif *blkif,
}
req->dev = vbd->pdevice;
- req->bdev = vbd->bdev;
+ req->bdev = vbd->bdev_handle->bdev;
rc = 0;
out:
@@ -969,7 +969,7 @@ static int dispatch_discard_io(struct xen_blkif_ring *ring,
int err = 0;
int status = BLKIF_RSP_OKAY;
struct xen_blkif *blkif = ring->blkif;
- struct block_device *bdev = blkif->vbd.bdev;
+ struct block_device *bdev = blkif->vbd.bdev_handle->bdev;
struct phys_req preq;
xen_blkif_get(blkif);
diff --git a/drivers/block/xen-blkback/common.h b/drivers/block/xen-blkback/common.h
index 40f67bfc052d..5ff50e76cee5 100644
--- a/drivers/block/xen-blkback/common.h
+++ b/drivers/block/xen-blkback/common.h
@@ -221,7 +221,7 @@ struct xen_vbd {
unsigned char type;
/* phys device that this vbd maps to. */
u32 pdevice;
- struct block_device *bdev;
+ struct bdev_handle *bdev_handle;
/* Cached size parameter. */
sector_t size;
unsigned int flush_support:1;
@@ -360,7 +360,7 @@ struct pending_req {
};
-#define vbd_sz(_v) bdev_nr_sectors((_v)->bdev)
+#define vbd_sz(_v) bdev_nr_sectors((_v)->bdev_handle->bdev)
#define xen_blkif_get(_b) (atomic_inc(&(_b)->refcnt))
#define xen_blkif_put(_b) \
diff --git a/drivers/block/xen-blkback/xenbus.c b/drivers/block/xen-blkback/xenbus.c
index bb66178c432b..e34219ea2b05 100644
--- a/drivers/block/xen-blkback/xenbus.c
+++ b/drivers/block/xen-blkback/xenbus.c
@@ -81,7 +81,7 @@ static void xen_update_blkif_status(struct xen_blkif *blkif)
int i;
/* Not ready to connect? */
- if (!blkif->rings || !blkif->rings[0].irq || !blkif->vbd.bdev)
+ if (!blkif->rings || !blkif->rings[0].irq || !blkif->vbd.bdev_handle)
return;
/* Already connected? */
@@ -99,12 +99,13 @@ static void xen_update_blkif_status(struct xen_blkif *blkif)
return;
}
- err = sync_blockdev(blkif->vbd.bdev);
+ err = sync_blockdev(blkif->vbd.bdev_handle->bdev);
if (err) {
xenbus_dev_error(blkif->be->dev, err, "block flush");
return;
}
- invalidate_inode_pages2(blkif->vbd.bdev->bd_inode->i_mapping);
+ invalidate_inode_pages2(
+ blkif->vbd.bdev_handle->bdev->bd_inode->i_mapping);
for (i = 0; i < blkif->nr_rings; i++) {
ring = &blkif->rings[i];
@@ -472,9 +473,9 @@ static void xenvbd_sysfs_delif(struct xenbus_device *dev)
static void xen_vbd_free(struct xen_vbd *vbd)
{
- if (vbd->bdev)
- blkdev_put(vbd->bdev, NULL);
- vbd->bdev = NULL;
+ if (vbd->bdev_handle)
+ bdev_release(vbd->bdev_handle);
+ vbd->bdev_handle = NULL;
}
static int xen_vbd_create(struct xen_blkif *blkif, blkif_vdev_t handle,
@@ -482,7 +483,7 @@ static int xen_vbd_create(struct xen_blkif *blkif, blkif_vdev_t handle,
int cdrom)
{
struct xen_vbd *vbd;
- struct block_device *bdev;
+ struct bdev_handle *bdev_handle;
vbd = &blkif->vbd;
vbd->handle = handle;
@@ -491,17 +492,17 @@ static int xen_vbd_create(struct xen_blkif *blkif, blkif_vdev_t handle,
vbd->pdevice = MKDEV(major, minor);
- bdev = blkdev_get_by_dev(vbd->pdevice, vbd->readonly ?
+ bdev_handle = bdev_open_by_dev(vbd->pdevice, vbd->readonly ?
BLK_OPEN_READ : BLK_OPEN_WRITE, NULL, NULL);
- if (IS_ERR(bdev)) {
+ if (IS_ERR(bdev_handle)) {
pr_warn("xen_vbd_create: device %08x could not be opened\n",
vbd->pdevice);
return -ENOENT;
}
- vbd->bdev = bdev;
- if (vbd->bdev->bd_disk == NULL) {
+ vbd->bdev_handle = bdev_handle;
+ if (vbd->bdev_handle->bdev->bd_disk == NULL) {
pr_warn("xen_vbd_create: device %08x doesn't exist\n",
vbd->pdevice);
xen_vbd_free(vbd);
@@ -509,14 +510,14 @@ static int xen_vbd_create(struct xen_blkif *blkif, blkif_vdev_t handle,
}
vbd->size = vbd_sz(vbd);
- if (cdrom || disk_to_cdi(vbd->bdev->bd_disk))
+ if (cdrom || disk_to_cdi(vbd->bdev_handle->bdev->bd_disk))
vbd->type |= VDISK_CDROM;
- if (vbd->bdev->bd_disk->flags & GENHD_FL_REMOVABLE)
+ if (vbd->bdev_handle->bdev->bd_disk->flags & GENHD_FL_REMOVABLE)
vbd->type |= VDISK_REMOVABLE;
- if (bdev_write_cache(bdev))
+ if (bdev_write_cache(bdev_handle->bdev))
vbd->flush_support = true;
- if (bdev_max_secure_erase_sectors(bdev))
+ if (bdev_max_secure_erase_sectors(bdev_handle->bdev))
vbd->discard_secure = true;
pr_debug("Successful creation of handle=%04x (dom=%u)\n",
@@ -569,7 +570,7 @@ static void xen_blkbk_discard(struct xenbus_transaction xbt, struct backend_info
struct xen_blkif *blkif = be->blkif;
int err;
int state = 0;
- struct block_device *bdev = be->blkif->vbd.bdev;
+ struct block_device *bdev = be->blkif->vbd.bdev_handle->bdev;
if (!xenbus_read_unsigned(dev->nodename, "discard-enable", 1))
return;
@@ -930,15 +931,16 @@ static void connect(struct backend_info *be)
goto abort;
}
err = xenbus_printf(xbt, dev->nodename, "sector-size", "%lu",
- (unsigned long)
- bdev_logical_block_size(be->blkif->vbd.bdev));
+ (unsigned long)bdev_logical_block_size(
+ be->blkif->vbd.bdev_handle->bdev));
if (err) {
xenbus_dev_fatal(dev, err, "writing %s/sector-size",
dev->nodename);
goto abort;
}
err = xenbus_printf(xbt, dev->nodename, "physical-sector-size", "%u",
- bdev_physical_block_size(be->blkif->vbd.bdev));
+ bdev_physical_block_size(
+ be->blkif->vbd.bdev_handle->bdev));
if (err)
xenbus_dev_error(dev, err, "writing %s/physical-sector-size",
dev->nodename);
--
2.35.3
