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block_util: Port synchronous QCOW file to AsyncIo trait

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Based on the synchronous QCOW file implementation present in the qcow
crate, we created a new qcow_sync module in block_util that ports this
synchronous implementation to the AsyncIo trait.

The point is to reuse virtio-blk asynchronous implementation for both
synchronous and asynchronous backends.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit is contained in:
Sebastien Boeuf
2021-01-22 09:56:38 +01:00
committed by Rob Bradford
parent 9fc86a91e2
commit 12e20effd7
4 changed files with 207 additions and 57 deletions
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8
virtio-devices/src/seccomp_filters.rs
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@@ -128,11 +128,19 @@ fn virtio_blk_io_uring_thread_rules() -> Result<Vec<SyscallRuleSet>, Error> {
allow_syscall(libc::SYS_epoll_wait),
allow_syscall(libc::SYS_exit),
allow_syscall(libc::SYS_fsync),
#[cfg(target_arch = "x86_64")]
allow_syscall(libc::SYS_ftruncate),
#[cfg(target_arch = "aarch64")]
// The definition of libc::SYS_ftruncate is missing on AArch64.
// Use a hard-code number instead.
allow_syscall(46),
allow_syscall(libc::SYS_futex),
allow_syscall(SYS_IO_URING_ENTER),
allow_syscall(libc::SYS_lseek),
allow_syscall(libc::SYS_madvise),
allow_syscall(libc::SYS_mprotect),
allow_syscall(libc::SYS_munmap),
allow_syscall(libc::SYS_openat),
allow_syscall(libc::SYS_read),
allow_syscall(libc::SYS_rt_sigprocmask),
allow_syscall(libc::SYS_sigaltstack),