bwlp/qemu.git/block/export, branch master

block: remove bdrv_try_set_aio_context and replace it with bdrv_try_change_aio_context

2022-10-27T18:14:11+00:00

No functional change intended. Signed-off-by: Emanuele Giuseppe Esposito Reviewed-by: Kevin Wolf Message-Id: <20221025084952.2139888-11-eesposit@redhat.com> Signed-off-by: Kevin Wolf

block: Change blk_{pread,pwrite}() param order

2022-07-12T10:14:56+00:00

Swap 'buf' and 'bytes' around for consistency with blk_co_{pread,pwrite}(), and in preparation to implement these functions using generated_co_wrapper. Callers were updated using this Coccinelle script: @@ expression blk, offset, buf, bytes, flags; @@ - blk_pread(blk, offset, buf, bytes, flags) + blk_pread(blk, offset, bytes, buf, flags) @@ expression blk, offset, buf, bytes, flags; @@ - blk_pwrite(blk, offset, buf, bytes, flags) + blk_pwrite(blk, offset, bytes, buf, flags) It had no effect on hw/block/nand.c, presumably due to the #if, so that file was updated manually. Overly-long lines were then fixed by hand. Signed-off-by: Alberto Faria Reviewed-by: Eric Blake Reviewed-by: Hanna Reitz Message-Id: <20220705161527.1054072-4-afaria@redhat.com> Signed-off-by: Hanna Reitz

block: Add a 'flags' param to blk_pread()

2022-07-12T10:14:56+00:00

For consistency with other I/O functions, and in preparation to implement it using generated_co_wrapper. Callers were updated using this Coccinelle script: @@ expression blk, offset, buf, bytes; @@ - blk_pread(blk, offset, buf, bytes) + blk_pread(blk, offset, buf, bytes, 0) It had no effect on hw/block/nand.c, presumably due to the #if, so that file was updated manually. Overly-long lines were then fixed by hand. Signed-off-by: Alberto Faria Reviewed-by: Paolo Bonzini Reviewed-by: Greg Kurz Reviewed-by: Hanna Reitz Message-Id: <20220705161527.1054072-3-afaria@redhat.com> Signed-off-by: Hanna Reitz

vduse-blk: Add name option

2022-06-24T15:07:06+00:00

Currently we use 'id' option as the name of VDUSE device. It's a bit confusing since we use one value for two different purposes: the ID to identfy the export within QEMU (must be distinct from any other exports in the same QEMU process, but can overlap with names used by other processes), and the VDUSE name to uniquely identify it on the host (must be distinct from other VDUSE devices on the same host, but can overlap with other export types like NBD in the same process). To make it clear, this patch adds a separate 'name' option to specify the VDUSE name for the vduse-blk export instead. Signed-off-by: Xie Yongji Message-Id: <20220614051532.92-7-xieyongji@bytedance.com> Signed-off-by: Kevin Wolf

vduse-blk: Add serial option

2022-06-24T15:07:06+00:00

Add a 'serial' option to allow user to specify this value explicitly. And the default value is changed to an empty string as what we did in "hw/block/virtio-blk.c". Signed-off-by: Xie Yongji Message-Id: <20220614051532.92-6-xieyongji@bytedance.com> Signed-off-by: Kevin Wolf

libvduse: Add support for reconnecting

2022-06-24T15:07:06+00:00

To support reconnecting after restart or crash, VDUSE backend might need to resubmit inflight I/Os. This stores the metadata such as the index of inflight I/O's descriptors to a shm file so that VDUSE backend can restore them during reconnecting. Signed-off-by: Xie Yongji Message-Id: <20220523084611.91-9-xieyongji@bytedance.com> Reviewed-by: Stefan Hajnoczi Signed-off-by: Kevin Wolf

vduse-blk: Add vduse-blk resize support

2022-06-24T15:07:06+00:00

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 Reviewed-by: Stefan Hajnoczi Message-Id: <20220523084611.91-8-xieyongji@bytedance.com> Signed-off-by: Kevin Wolf

vduse-blk: Implement vduse-blk export

2022-06-24T15:07:06+00:00

This implements a VDUSE block backends based on the libvduse library. We can use it to export the BDSs for both VM and container (host) usage. The new command-line syntax is: $ qemu-storage-daemon \ --blockdev file,node-name=drive0,filename=test.img \ --export vduse-blk,node-name=drive0,id=vduse-export0,writable=on After the qemu-storage-daemon started, we need to use the "vdpa" command to attach the device to vDPA bus: $ vdpa dev add name vduse-export0 mgmtdev vduse Also the device must be removed via the "vdpa" command before we stop the qemu-storage-daemon. Signed-off-by: Xie Yongji Reviewed-by: Stefan Hajnoczi Message-Id: <20220523084611.91-7-xieyongji@bytedance.com> Signed-off-by: Kevin Wolf

block/export: Abstract out the logic of virtio-blk I/O process

2022-06-24T15:07:06+00:00

Abstract the common logic of virtio-blk I/O process to a function named virtio_blk_process_req(). It's needed for the following commit. Signed-off-by: Xie Yongji Message-Id: <20220523084611.91-4-xieyongji@bytedance.com> Reviewed-by: Stefan Hajnoczi Signed-off-by: Kevin Wolf

block/export: Fix incorrect length passed to vu_queue_push()

2022-06-24T15:07:06+00:00

Now the req->size is set to the correct value only when handling VIRTIO_BLK_T_GET_ID request. This patch fixes it. Signed-off-by: Xie Yongji Message-Id: <20220523084611.91-3-xieyongji@bytedance.com> Reviewed-by: Stefan Hajnoczi Signed-off-by: Kevin Wolf