vmsilo fork of vhost rust libraries
d05f1b5e12
The vhost user protocol supports live migration, and during live migration, the vhost-user frontend needs to track the modifications the vhost-user backend makes to the memory mapped regions, marking the dirty pages in a log (i.e., a bitmap). If the backend has the VHOST_USER_PROTOCOL_F_LOG_SHMFD protocol feature it will receive the VHOST_USER_SET_LOG_BASE message with a file descriptor of the dirty-pages log memory region. This log covers all known guest addresses, and must be manipulated atomically. For further info please see https://qemu-project.gitlab.io/qemu/interop/vhost-user.html#migration This commit adds support for creating an atomic-memory-mapped bitmap, and being able to replace it in runtime. The vhost user protocol does not specify whether the previous bitmap is still active after replying to the VHOST_USER_SET_LOG_BASE message, so we use an RwLock to be sure that the in-flight requests are using the new bitmap after the message reply. Signed-off-by: German Maglione <gmaglione@redhat.com> |
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| .buildkite | ||
| .cargo | ||
| .github | ||
| rust-vmm-ci@7606478202 | ||
| vhost | ||
| vhost-user-backend | ||
| .gitignore | ||
| .gitmodules | ||
| Cargo.toml | ||
| CODEOWNERS | ||
| coverage_config_aarch64.json | ||
| coverage_config_x86_64.json | ||
| LICENSE | ||
| LICENSE-BSD-3-Clause | ||
| README.md | ||
vhost
The vhost workspace hosts libraries related to the vhost and vhost-user
protocols. It currently consists of the following crates:
vhost-> A pure rust library for vDPA, vhost and vhost-user.vhost-user-backend-> It provides a framework to implementvhost-userbackend services.