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| author | Daniel Verkamp <dverkamp@chromium.org> | 2019-10-07 13:06:22 -0700 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2019-10-29 22:06:22 +0000 |
| commit | ec5916daa056b2ad68a5dc2a7c604299aa3e2c8f (patch) | |
| tree | a28c4c670fb0a52b31534e28fe0cfbeb0c18e710 /seccomp | |
| parent | f1e69259f747232054f7439e10d79705537a54e1 (diff) | |
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devices: virtio: block: use FileReadWriteAtVolatile
Use the "at" variants of the read/write functions in the block device. This reduces the number of syscalls on the host per I/O to one (pread64/pwrite64) rather than two (lseek + read/write). The CompositeDiskFile implementation is also updated in this commit, since it's both a producer and consumer of DiskFile, and it isn't trivial to update it in a separate commit without breaking compilation. BUG=None TEST=Start Crostini on kevin, banon, and nami Change-Id: I031e7e87cd6c99504db8c56b1725ea51c1e27a53 Signed-off-by: Daniel Verkamp <dverkamp@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1845948 Tested-by: kokoro <noreply+kokoro@google.com> Reviewed-by: Stephen Barber <smbarber@chromium.org>
Diffstat (limited to 'seccomp')
| -rw-r--r-- | seccomp/arm/block_device.policy | 2 | ||||
| -rw-r--r-- | seccomp/x86_64/block_device.policy | 2 |
2 files changed, 4 insertions, 0 deletions
diff --git a/seccomp/arm/block_device.policy b/seccomp/arm/block_device.policy index 62f4ee7..1ec4053 100644 --- a/seccomp/arm/block_device.policy +++ b/seccomp/arm/block_device.policy @@ -10,6 +10,8 @@ fstat64: 1 fsync: 1 ftruncate64: 1 _llseek: 1 +preadv: 1 +pwritev: 1 timerfd_create: 1 timerfd_gettime: 1 timerfd_settime: 1 diff --git a/seccomp/x86_64/block_device.policy b/seccomp/x86_64/block_device.policy index 20eca1a..6bb5c32 100644 --- a/seccomp/x86_64/block_device.policy +++ b/seccomp/x86_64/block_device.policy @@ -10,6 +10,8 @@ fstat: 1 fsync: 1 ftruncate: 1 lseek: 1 +preadv: 1 +pwritev: 1 timerfd_create: 1 timerfd_gettime: 1 timerfd_settime: 1 |