55 lines
2.0 KiB
Diff
55 lines
2.0 KiB
Diff
From dfda8c57de71f2f10b57cf21b1e36f18d4ed37a3 Mon Sep 17 00:00:00 2001
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From: Jiahui Cen <cenjiahui@huawei.com>
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Date: Thu, 21 Jan 2021 15:46:47 +0800
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Subject: [PATCH 3/7] block-backend: Add device specific retry callback
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Add retry_request_cb in BlockDevOps to do device specific retry action.
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Backend's timer would be registered only when the backend is set 'retry'
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on errors and the device supports retry action.
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Signed-off-by: Jiahui Cen <cenjiahui(a)huawei.com>
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Signed-off-by: Ying Fang <fangying1(a)huawei.com>
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Signed-off-by: Alex Chen <alex.chen@huawei.com>
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---
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block/block-backend.c | 8 ++++++++
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include/sysemu/block-backend.h | 4 ++++
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2 files changed, 12 insertions(+)
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diff --git a/block/block-backend.c b/block/block-backend.c
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index 257cd775c0..24003adf0b 100644
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--- a/block/block-backend.c
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+++ b/block/block-backend.c
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@@ -1018,6 +1018,14 @@ void blk_set_dev_ops(BlockBackend *blk, const BlockDevOps *ops,
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blk->dev_ops = ops;
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blk->dev_opaque = opaque;
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+ if ((blk->on_read_error == BLOCKDEV_ON_ERROR_RETRY ||
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+ blk->on_write_error == BLOCKDEV_ON_ERROR_RETRY) &&
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+ ops->retry_request_cb) {
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+ blk->retry_timer = aio_timer_new(blk->ctx, QEMU_CLOCK_REALTIME,
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+ SCALE_MS, ops->retry_request_cb,
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+ opaque);
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+ }
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+
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/* Are we currently quiesced? Should we enforce this right now? */
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if (blk->quiesce_counter && ops->drained_begin) {
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ops->drained_begin(opaque);
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diff --git a/include/sysemu/block-backend.h b/include/sysemu/block-backend.h
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index e5e1524f06..a7a13d47de 100644
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--- a/include/sysemu/block-backend.h
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+++ b/include/sysemu/block-backend.h
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@@ -70,6 +70,10 @@ typedef struct BlockDevOps {
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* Is the device still busy?
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*/
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bool (*drained_poll)(void *opaque);
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+ /*
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+ * Runs when retrying failed requests.
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+ */
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+ void (*retry_request_cb)(void *opaque);
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} BlockDevOps;
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/* This struct is embedded in (the private) BlockBackend struct and contains
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--
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2.27.0
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