Inflight I/O: Fix the memory layout of queue region header#88
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zhangjaycee wants to merge 1 commit intorust-vmm:mainfrom
Open
Inflight I/O: Fix the memory layout of queue region header#88zhangjaycee wants to merge 1 commit intorust-vmm:mainfrom
zhangjaycee wants to merge 1 commit intorust-vmm:mainfrom
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zhangjaycee
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As defined in the vhost-user protocol[1], the last field of queue region header should be a zero-sized array. However, current implementation uses u64, which will cause a wrong inflight I/O memfd memory layout. So, let's just remove the desc fileds to fix it. [1] https://qemu-project.gitlab.io/qemu/interop/vhost-user.html Signed-off-by: Jiachen Zhang <zhangjiachen.jaycee@bytedance.com>
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Yep, it seems wrong. Maybe we should use |
Member
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could you please help to rebase or try FamStruct from vmm_sys_util crate? |
sboeuf
previously approved these changes
Dec 20, 2021
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@zhangjaycee we would like to fix this problem. Do you have plans to complete this PR? |
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I was taking a look at this issue, but I'm not sure how to test my fix. Any clues? :) |
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@luigix25 @zhangjaycee any update on this? |
Not really, I'm not working on this anymore. |
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As defined in the vhost-user protocol[1], the last field of queue region
header should be a zero-sized array. However, current implementation uses
u64, which will cause a wrong inflight I/O memfd memory layout. So, let's
just remove the desc fileds to fix it.
[1]
https://qemu-project.gitlab.io/qemu/interop/vhost-user.html#inflight-i-o-tracking
Signed-off-by: Jiachen Zhang zhangjiachen.jaycee@bytedance.com