Preston_PLB
/
kernel-aes67
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

xen: port block device access to file 

Link: https://lore.kernel.org/r/20240123-vfs-bdev-file-v2-11-adbd023e19cc@kernel.org
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Christian Brauner <brauner@kernel.org>
This commit is contained in:
Christian Brauner 2024-01-23 14:26:28 +01:00
parent a34606a9aa
commit 217759bbb9
No known key found for this signature in database
GPG Key ID: 91C61BC06578DCA2
3 changed files with 22 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/block/xen-blkback/blkback.c
View File

@ -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_handle->bdev;
req->bdev = file_bdev(vbd->bdev_file);
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_handle->bdev;
struct block_device *bdev = file_bdev(blkif->vbd.bdev_file);
struct phys_req preq;
xen_blkif_get(blkif);

4
drivers/block/xen-blkback/common.h
View File

@ -221,7 +221,7 @@ struct xen_vbd {
unsigned char type;
/* phys device that this vbd maps to. */
u32 pdevice;
struct bdev_handle *bdev_handle;
struct file *bdev_file;
/* 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_handle->bdev)
#define vbd_sz(_v) bdev_nr_sectors(file_bdev((_v)->bdev_file))
#define xen_blkif_get(_b) (atomic_inc(&(_b)->refcnt))
#define xen_blkif_put(_b) \

37
drivers/block/xen-blkback/xenbus.c
View File

@ -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_handle)
if (!blkif->rings || !blkif->rings[0].irq || !blkif->vbd.bdev_file)
return;
/* Already connected? */
@ -99,13 +99,12 @@ static void xen_update_blkif_status(struct xen_blkif *blkif)
return;
}
err = sync_blockdev(blkif->vbd.bdev_handle->bdev);
err = sync_blockdev(file_bdev(blkif->vbd.bdev_file));
if (err) {
xenbus_dev_error(blkif->be->dev, err, "block flush");
return;
}
invalidate_inode_pages2(
blkif->vbd.bdev_handle->bdev->bd_inode->i_mapping);
invalidate_inode_pages2(blkif->vbd.bdev_file->f_mapping);
for (i = 0; i < blkif->nr_rings; i++) {
ring = &blkif->rings[i];
@ -473,9 +472,9 @@ static void xenvbd_sysfs_delif(struct xenbus_device *dev)
static void xen_vbd_free(struct xen_vbd *vbd)
{
if (vbd->bdev_handle)
bdev_release(vbd->bdev_handle);
vbd->bdev_handle = NULL;
if (vbd->bdev_file)
fput(vbd->bdev_file);
vbd->bdev_file = NULL;
}
static int xen_vbd_create(struct xen_blkif *blkif, blkif_vdev_t handle,
@ -483,7 +482,7 @@ static int xen_vbd_create(struct xen_blkif *blkif, blkif_vdev_t handle,
int cdrom)
{
struct xen_vbd *vbd;
struct bdev_handle *bdev_handle;
struct file *bdev_file;
vbd = &blkif->vbd;
vbd->handle = handle;
@ -492,17 +491,17 @@ static int xen_vbd_create(struct xen_blkif *blkif, blkif_vdev_t handle,
vbd->pdevice = MKDEV(major, minor);
bdev_handle = bdev_open_by_dev(vbd->pdevice, vbd->readonly ?
bdev_file = bdev_file_open_by_dev(vbd->pdevice, vbd->readonly ?
BLK_OPEN_READ : BLK_OPEN_WRITE, NULL, NULL);
if (IS_ERR(bdev_handle)) {
if (IS_ERR(bdev_file)) {
pr_warn("xen_vbd_create: device %08x could not be opened\n",
vbd->pdevice);
return -ENOENT;
}
vbd->bdev_handle = bdev_handle;
if (vbd->bdev_handle->bdev->bd_disk == NULL) {
vbd->bdev_file = bdev_file;
if (file_bdev(vbd->bdev_file)->bd_disk == NULL) {
pr_warn("xen_vbd_create: device %08x doesn't exist\n",
vbd->pdevice);
xen_vbd_free(vbd);
@ -510,14 +509,14 @@ 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_handle->bdev->bd_disk))
if (cdrom || disk_to_cdi(file_bdev(vbd->bdev_file)->bd_disk))
vbd->type |= VDISK_CDROM;
if (vbd->bdev_handle->bdev->bd_disk->flags & GENHD_FL_REMOVABLE)
if (file_bdev(vbd->bdev_file)->bd_disk->flags & GENHD_FL_REMOVABLE)
vbd->type |= VDISK_REMOVABLE;
if (bdev_write_cache(bdev_handle->bdev))
if (bdev_write_cache(file_bdev(bdev_file)))
vbd->flush_support = true;
if (bdev_max_secure_erase_sectors(bdev_handle->bdev))
if (bdev_max_secure_erase_sectors(file_bdev(bdev_file)))
vbd->discard_secure = true;
pr_debug("Successful creation of handle=%04x (dom=%u)\n",
@ -570,7 +569,7 @@ 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_handle->bdev;
struct block_device *bdev = file_bdev(be->blkif->vbd.bdev_file);
if (!xenbus_read_unsigned(dev->nodename, "discard-enable", 1))
return;
@ -932,7 +931,7 @@ again:
}
err = xenbus_printf(xbt, dev->nodename, "sector-size", "%lu",
(unsigned long)bdev_logical_block_size(
be->blkif->vbd.bdev_handle->bdev));
file_bdev(be->blkif->vbd.bdev_file)));
if (err) {
xenbus_dev_fatal(dev, err, "writing %s/sector-size",
dev->nodename);
@ -940,7 +939,7 @@ again:
}
err = xenbus_printf(xbt, dev->nodename, "physical-sector-size", "%u",
bdev_physical_block_size(
be->blkif->vbd.bdev_handle->bdev));
file_bdev(be->blkif->vbd.bdev_file)));
if (err)
xenbus_dev_error(dev, err, "writing %s/physical-sector-size",
dev->nodename);