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[PATCH v5 7/8] vduse-blk: Add vduse-blk resize support
From: |
Xie Yongji |
Subject: |
[PATCH v5 7/8] vduse-blk: Add vduse-blk resize support |
Date: |
Wed, 4 May 2022 15:40:50 +0800 |
To support block resize, this uses vduse_dev_update_config()
to update the capacity field in configuration space and inject
config interrupt on the block resize callback.
Signed-off-by: Xie Yongji <xieyongji@bytedance.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
---
block/export/vduse-blk.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/block/export/vduse-blk.c b/block/export/vduse-blk.c
index 8580ae929f..2b72baf7ab 100644
--- a/block/export/vduse-blk.c
+++ b/block/export/vduse-blk.c
@@ -188,6 +188,23 @@ static void blk_aio_detach(void *opaque)
vblk_exp->export.ctx = NULL;
}
+static void vduse_blk_resize(void *opaque)
+{
+ BlockExport *exp = opaque;
+ VduseBlkExport *vblk_exp = container_of(exp, VduseBlkExport, export);
+ struct virtio_blk_config config;
+
+ config.capacity =
+ cpu_to_le64(blk_getlength(exp->blk) >> VIRTIO_BLK_SECTOR_BITS);
+ vduse_dev_update_config(vblk_exp->dev, sizeof(config.capacity),
+ offsetof(struct virtio_blk_config, capacity),
+ (char *)&config.capacity);
+}
+
+static const BlockDevOps vduse_block_ops = {
+ .resize_cb = vduse_blk_resize,
+};
+
static int vduse_blk_exp_create(BlockExport *exp, BlockExportOptions *opts,
Error **errp)
{
@@ -284,6 +301,8 @@ static int vduse_blk_exp_create(BlockExport *exp,
BlockExportOptions *opts,
blk_add_aio_context_notifier(exp->blk, blk_aio_attached, blk_aio_detach,
vblk_exp);
+ blk_set_dev_ops(exp->blk, &vduse_block_ops, exp);
+
return 0;
}
@@ -293,6 +312,7 @@ static void vduse_blk_exp_delete(BlockExport *exp)
blk_remove_aio_context_notifier(exp->blk, blk_aio_attached, blk_aio_detach,
vblk_exp);
+ blk_set_dev_ops(exp->blk, NULL, NULL);
vduse_dev_destroy(vblk_exp->dev);
}
--
2.20.1
- [PATCH v5 0/8] Support exporting BDSs via VDUSE, Xie Yongji, 2022/05/04
- [PATCH v5 1/8] block: Support passing NULL ops to blk_set_dev_ops(), Xie Yongji, 2022/05/04
- [PATCH v5 2/8] block-backend: Introduce blk_get_guest_block_size(), Xie Yongji, 2022/05/04
- [PATCH v5 6/8] vduse-blk: Implement vduse-blk export, Xie Yongji, 2022/05/04
- [PATCH v5 7/8] vduse-blk: Add vduse-blk resize support,
Xie Yongji <=
- [PATCH v5 5/8] libvduse: Add VDUSE (vDPA Device in Userspace) library, Xie Yongji, 2022/05/04
- [PATCH v5 3/8] block/export: Abstract out the logic of virtio-blk I/O process, Xie Yongji, 2022/05/04
- [PATCH v5 4/8] linux-headers: Add vduse.h, Xie Yongji, 2022/05/04
- [PATCH v5 8/8] libvduse: Add support for reconnecting, Xie Yongji, 2022/05/04