The setres{u,g}id and the gete{u,g}id system calls on arm use 16 bit
values for uid_t and gid_t. This causes the kernel to interpret a
uid/gid of 65535 as -1, which means do nothing.
Use the 32-bit variants of these system calls instead so that we can use
32-bit values. Normally, libc would take care of hiding these kinds of
implementation details but since we can't use the libc wrappers for
these system calls, we have to do it ourselves.
BUG=b:136128319
TEST=`tast run vm.Virtiofs` on kevin
Change-Id: I6c0fda42c131e059139000828b3a53d4a73f340c
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1923569
Tested-by: Chirantan Ekbote <chirantan@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
Commit-Queue: Chirantan Ekbote <chirantan@chromium.org>
Reviewed-by: Stephen Barber <smbarber@chromium.org>
Having more than one thread watch the interrupt resample event meant
that the threads would race to acknowledge the event: if thread B called
epoll_wait after thread A got a readable event for the resample eventfd
but before thread A called `read()` on the eventfd, then thread B would
also get a readable event for that eventfd. Both threads would then
attempt to acknowledge the event but only one would succeed. This would
leave the other thread blocked on the `read()` call until the resample
event became readable again.
Fix this by having only one worker watch the resample event.
BUG=b:136128319
TEST=`tast run vm.Virtiofs` on kevin
Change-Id: I5cd781a9c79ac718207a944433ea20a967735237
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1923568
Tested-by: Chirantan Ekbote <chirantan@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
Commit-Queue: Chirantan Ekbote <chirantan@chromium.org>
Reviewed-by: Stephen Barber <smbarber@chromium.org>
Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>
rlim_t is defined as an unsigned long but importantly, it is defined as
what the _kernel_ thinks is an unsigned long. This means that when you
have a 32-bit userspace and a 64-bit kernel (like we do for arm64
chromebooks), rlim_t is 64 bits.
This isn't really a problem for C and C++ code because they use the
headers from the kernel where rlim_t is properly sized but it doesn't
really work for rust. The libc crate defines rlim_t as an alias for
::std::os::raw::c_ulong, which leads to the rust compiler thinking that
it has a 32 bit width.
Hilarity ensues when you attempt to cross the rust -> C FFI barrier with
these conflicting definitions. The rust compiler thinks the parameters
can fit in 32 bit registers so it puts the `cur` parameter in r2 and the
`max` parameter in r3. On the other hand, the C code knows that the
parameters are 64-bit values and combines r2/r3 to create the 64-bit
`cur` value and uses the first 8 bytes on the stack as the `max` value.
This leads to a `cur` value that is way too large and a nonsensical
`max` value that depends on whatever happened to be on the stack at the
time.
Fix this by changing the library bindings to u64 and the
Minijail::set_rlimit parameters to rlim64_t. Once we add a method to
minijail that accepts rlim64_t's we can switch the library bindings to
use that as well.
BUG=b:136128319
TEST=`tast run vm.Virtiofs` on kevin
Change-Id: I8f58923c4768ecfe827d2a5d73c72dc778fe419c
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1916560
Reviewed-by: Chirantan Ekbote <chirantan@chromium.org>
Tested-by: Chirantan Ekbote <chirantan@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
Commit-Queue: Chirantan Ekbote <chirantan@chromium.org>
From ac97 spec, SR_CELV should be synced with civ == lvi in bus_master.
intel8x0 is not using the bit but some other driver or system might be
using it.
Remove checking if new_sr equals to old_sr since update_sr will do
nothing if the input value equals to the old sr value.
Add unit tests steps to test the expected results.
BUG=chromium:1026538
TEST=Unit tests
Change-Id: I3dc9f42e2beed8e635a65dbefba44677c73fcc5b
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1925917
Tested-by: Chih-Yang Hsia <paulhsia@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
Commit-Queue: Dylan Reid <dgreid@chromium.org>
Reviewed-by: Dylan Reid <dgreid@chromium.org>
In bus_master control register (CR), reset registers (RR) operation is
refactored by:
- Don't call stop_audio(), since the bus master should always be in stop
state while getting this control. (From AC'97 spec: Setting it when the
Run bit is set will cause undefined consequences."). And the driver
will always disable the audio first by setting 0 to CR_RPBM bit.
- While doing the registers reset, clean up sr by using update_sr since
assigning 0 to sr directly won't unset the interrupt bit in global
status register and the driver might go into snd_intel8x0_update()
with a stopped substream.
- Introduce helper function - reset_func_regs()
Add steps in unit tests which
- Start the bus masters with "Interrupt on Completion Enable" (CR_IOCE) bit.
- Verify if the interrupt bit in global status register is set / unset.
BUG=chromium:1026538
TEST=Unit tests
Change-Id: Ie90ca4c82cc3c867992ecaeb61ef4b3e9dd0d079
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1925916
Reviewed-by: Chih-Yang Hsia <paulhsia@chromium.org>
Tested-by: Chih-Yang Hsia <paulhsia@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
Commit-Queue: Dylan Reid <dgreid@chromium.org>
Add x86_64 and arm seccomp policy files for the virtio-fs device.
BUG=b:136128319
TEST=Run a vm with a sandboxed virtio-fs device
Change-Id: I8ea7c5d3e90696077f0c2b1f942cb286a0b36cf4
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1916559
Reviewed-by: Dylan Reid <dgreid@chromium.org>
Reviewed-by: Stephen Barber <smbarber@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
Commit-Queue: Chirantan Ekbote <chirantan@chromium.org>
Expand the `--shared-dir` option to allow callers to select between 9p
and virtio-fs for sharing directories.
BUG=b:136128319
TEST=start a VM with a virtio-fs based shared directory
Change-Id: Ie8afc1965b693805dd6000f0157786317aab060d
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1705656
Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
Commit-Queue: Chirantan Ekbote <chirantan@chromium.org>
Fix the block_fuzzer build after CL:1906750, which added a new parameter
to the Block::new() function without updating the fuzzer.
This change passes `true` for sparse in order to keep previous behavior
and maximize the available commands for fuzzing.
BUG=chromium:1025757
TEST=`USE='asan fuzzer' emerge-nami crosvm`
Change-Id: I29ed9945077936aee9636ddee20b59729eb78c85
Signed-off-by: Daniel Verkamp <dverkamp@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1922065
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Dylan Reid <dgreid@chromium.org>
Reviewed-by: Stephen Barber <smbarber@chromium.org>
Extend the --disk option and other related options to allow a particular
disk to have the sparse operations (virtio-blk's discard command)
enabled or disabled.
By default, the sparse flag will be enabled for virtio-blk devices,
matching current behavior.
BUG=chromium:858815
TEST=Run `crosvm with --rwdisk file.img,sparse=false` and try to discard
Change-Id: Ib72c949711fbe869a3f444d7f929a80d0e039f72
Signed-off-by: Daniel Verkamp <dverkamp@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1906750
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Zach Reizner <zachr@chromium.org>
At vfio device initialization, it will probe all the defined regions,
most device don't have vga region, then when crosvm probe vga region info,
kernel vfio will return -EINVAL. So when error happens, it should continue
getting the next region info, instead of exit.
BUG=None
TEST=passthrough non graphic device into guest
Change-Id: If4d2f723df45f58ccd733e03c854cdcef3530bdb
Signed-off-by: Xiong Zhang <xiong.y.zhang@intel.corp-partner.google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1918486
Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
Re-enable MSI-X for virtio-blk and virtio-net now that the underlying
issue causing hangs at startup has been fixed (CL:1917495).
BUG=chromium:1019986
TEST=Boot Termina on nami
This reverts commit 85858f580e.
Change-Id: I5a5e197243a16aee2b2aaf3145a1180749b097b2
Signed-off-by: Daniel Verkamp <dverkamp@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1918261
Reviewed-by: Zide Chen <zide.chen@intel.com>
Reviewed-by: Zach Reizner <zachr@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
The queue_evts() and interrupt_evt() functions were public, but nothing
was calling them. Remove them to clean up the unused code.
BUG=None
TEST=./build_test
Change-Id: Id36e78343869746c733bba04383ab93c9d377601
Signed-off-by: Daniel Verkamp <dverkamp@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1898270
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Zach Reizner <zachr@chromium.org>
Add handling of the virtio device MSI-X configuration change vector by
using the signal function that was previously factored out.
BUG=chromium:854765
TEST=./build_test
TEST=trigger disk config change with `crosvm disk resize ...`
Change-Id: I462c23e10d152f896586bb70b95634a53088d480
Signed-off-by: Daniel Verkamp <dverkamp@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1898269
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Zide Chen <zide.chen@intel.corp-partner.google.com>
Reviewed-by: Zach Reizner <zachr@chromium.org>
Factor out the common creation of struct Interrupt.
No functional change.
BUG=chromium:854765
TEST=./build_test
Change-Id: Idf8804771ba1af5181818f643e15e1b42918258a
Signed-off-by: Daniel Verkamp <dverkamp@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1898268
Tested-by: kokoro <noreply+kokoro@google.com>
This consolidates the status byte manipulation in process_one_request()
instead of requiring both that function and execute_request() to deal
with it.
The tests are modified to run the full process_one_request() function
instead of just execute_request() to exercise the full descriptor
parsing logic, and they are adapted to read the status of the request
from the status byte in the buffer from the descriptor since
process_one_request() returns successfully as long as the descriptor
parsing succeeded, even if the requested I/O failed.
BUG=None
TEST=./build_test
Change-Id: I17affabc2d3c30c810643ce260152cf34893b772
Signed-off-by: Daniel Verkamp <dverkamp@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1918479
Reviewed-by: Dylan Reid <dgreid@chromium.org>
Reviewed-by: Chirantan Ekbote <chirantan@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
The msix entries might be changed by guest during msix maksed. The
current implementation won't update the MSIX route table in this case
which can cause KVM still inject the IRQ according to the old routing.
To fix this, we should update the msix route regardless the msix mask
status.
BUG=chromium:1023692
TEST=cargo test -p devices
Change-Id: Ifa356b3834ff454ecfca1dbdd97a7ca940d1f2b6
Signed-off-by: Chuanxiao Dong <chuanxiao.dong@intel.corp-partner.google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1911721
Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>
Reviewed-by: Zide Chen <zide.chen@intel.corp-partner.google.com>
Tested-by: kokoro <noreply+kokoro@google.com>
Previously, PciConfiguration::get_bar_addr would only correctly return
the value of a 32-bit memory region; implement support for the other
valid BAR types as well.
BUG=None
TEST=cargo test -p devices
Change-Id: I221187dfb96b31d7fead73eccf605a0886021d8b
Signed-off-by: Daniel Verkamp <dverkamp@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1880164
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Dylan Reid <dgreid@chromium.org>
control_sockets.swap_remove() could cause host kernel to invoke
ep_remove() to remove the epoll item.
But it's called from the task work, and it could be deferred after
next poll_ctx.wait() which could unexpectedly pick up epoll events
from the already closed fd.
BUG=chromium:1019986
TEST=launch Crosvm guest from heavy loaded Linux host
Change-Id: I474a7a47a484e3acfae4383d61601e1553bd674f
Signed-off-by: Zide Chen <zide.chen@intel.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1917495
Reviewed-by: Zach Reizner <zachr@chromium.org>
Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
Builders should all have memfd support now.
BUG=chromium:942183
TEST=compile and run, CQ will also test
Cq-Depend: chromium:1901871, chromium:1907541
Change-Id: I0cd4ec43a51e9995def2e105d68e12a703168365
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1834701
Commit-Queue: Gurchetan Singh <gurchetansingh@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
Tested-by: Gurchetan Singh <gurchetansingh@chromium.org>
Reviewed-by: Zach Reizner <zachr@chromium.org>
Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>
Auto-Submit: Gurchetan Singh <gurchetansingh@chromium.org>
This change adds additional APIs that are present in the libminijail
header file but not in the rust thunk. In particular it adds the API
that allows pre-compiled bpf files to be used as a policy file. The
native API lacks an API to specify a filename (it only provides an API
to provide the contents of the file).
BUG=None
TEST=Local run of build_test to confirm that both .bpf and .policy files
work in a subsequent change.
Change-Id: I15510ffa857b501512f3f9905882545f407bcd78
Signed-off-by: Matt Delco <delco@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1914415
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Dylan Reid <dgreid@chromium.org>
Performance-wise this about breaks even, but greatly simplifies the
virtio-net handling for processing received frames.
BUG=chromium:753630
TEST=crostini.NetworkPerf
Change-Id: Ie7b576020ecfe2a6cc41b7f72bd7143795a9a457
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1906996
Tested-by: kokoro <noreply+kokoro@google.com>
Tested-by: Stephen Barber <smbarber@chromium.org>
Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>
Commit-Queue: Stephen Barber <smbarber@chromium.org>
Don't assume the file system is running as the root user when changing
credentials. Instead keep track of the thread euid/egid and use those
when restoring thread credentials.
BUG=b:136128319
TEST=`tast run vm.VirtioFs`
Change-Id: I37d59def99cd71de68aa7f94941031a86df54329
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1890584
Tested-by: Chirantan Ekbote <chirantan@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
Commit-Queue: Chirantan Ekbote <chirantan@chromium.org>
Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>
Reviewed-by: Stephen Barber <smbarber@chromium.org>
Add _exact/_all variants of the FileReadWriteAtVolatile functions on
descriptor Reader/Writer, and use them in the block device to replace
the short read/short write error cases. This ensures all data is
read/written even if the underlying implementation (in particular,
qcow2) does not transfer the full amount of data in one
read_vectored_at_volatile/write_vectored_at_volatile call.
BUG=chromium:1023422
TEST=`mkfs.btrfs /dev/vdb` with a qcow2 disk
Change-Id: Ia37a333947f6f63faf3d4a06cfcc297309d5aff6
Signed-off-by: Daniel Verkamp <dverkamp@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1907443
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Stephen Barber <smbarber@chromium.org>
Use 64bit flag in vfio device's bar to get correct mmio allocator.
BUG=chromium:992270
TEST=none
Change-Id: I8f3dab48eb6dc0b92071803aa3526cadda8034c7
Signed-off-by: Xiong Zhang <xiong.y.zhang@intel.corp-partner.google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1581143
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Zach Reizner <zachr@chromium.org>
gpa > guest_mem.end_addr() is used to avoid gpa fall into guest ram,
but low mmio maybe below guest_mem.end_addr(), this condition is false,
then low mmio couldn't be added. Since low mmio could be added into kvm
also, this condition is wrong.
This patch iterate all the guest memory reginos, and check whether it
overlap with any of them.
BUG=chromium:992270
TEST=bulld_test
Change-Id: I9560db43f9836f85d0ff927e7eeb92447774568c
Signed-off-by: Xiong Zhang <xiong.y.zhang@intel.corp-partner.google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1895235
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>
The virtio-fs server opens a lot of fds and needs to have it's open file
limit increased.
BUG=b:136128319
TEST=run pjdfstests
Change-Id: I9ccc9e0753f990788c9cef2540b3a1aab5f5d15d
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1890583
Tested-by: Chirantan Ekbote <chirantan@chromium.org>
Commit-Queue: Chirantan Ekbote <chirantan@chromium.org>
Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>
Reviewed-by: Stephen Barber <smbarber@chromium.org>
Since unified allocator is used to allocate mmio, this patch remove the
device memory name, and rename device to mmio.
BUG=chromium:992270
TEST=this patch doesn't change function, run build_test
Change-Id: I234b0db4b3c5de8cfee372ace5212a980564d0c7
Signed-off-by: Xiong Zhang <xiong.y.zhang@intel.corp-partner.google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1895234
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>
Current mmio and device two allocators exist, the purpose to define
two allocator is:
Accessing to gpa from mmio allocator cause vm exit, while gpa from
device allocator doesn't cause vm exit.
Whether vm exits exist or not, dependency on whether
vm->add_device_memory() is called with gpa from allocator or not.Even
if gpa is from mmio alloator, and vm->add_device_memory() is called
with this gpa, accessing this gpa won't cause vm exit. So mmio allocator
and device allocator couldn't guarantee the original purpose.
This patch unify mmio allocator and device allocator into one mmio
allocator.
BUG=chromium:992270
TEST=this patch doesn't change function, so just run build_test
Change-Id: If87d5c2838eb122ef627fa45c394b1b3ccfafeb0
Signed-off-by: Xiong Zhang <xiong.y.zhang@intel.corp-partner.google.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1895233
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Zach Reizner <zachr@chromium.org>
Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>
This allows the caller to grab a buffer without committing to using it,
which can be used in the case where two resources (a virtio buffer plus
some other resource) need to be acquired simultaneously.
BUG=None
TEST=build_test.py
Change-Id: Icb61de99db807648ff02c41f95b3128ecce41501
Signed-off-by: Daniel Verkamp <dverkamp@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1904638
Reviewed-by: Stephen Barber <smbarber@chromium.org>
Tested-by: Stephen Barber <smbarber@chromium.org>
Commit-Queue: Stephen Barber <smbarber@chromium.org>
Convert the virtio wayland device to use the descriptor_util
Reader/Writer helpers to simplify the code and allow support
of arbitrary descriptor layouts.
BUG=chromium:966258
TEST=./build_test.py
Change-Id: Ic854b76d378be261db4f21cba475bd0abc4af80e
Signed-off-by: Daniel Verkamp <dverkamp@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1815418
Reviewed-by: Stephen Barber <smbarber@chromium.org>
Reviewed-by: Zach Reizner <zachr@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
Fixes clippy warning:
warning: this .into_iter() call is equivalent to .iter() and will not
move the slice
BUG=None
TEST=bin/clippy
Change-Id: I5361495f02609dd5e5313b7bc792e663841212ad
Signed-off-by: Daniel Verkamp <dverkamp@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1896091
Reviewed-by: Zach Reizner <zachr@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
Ignore the clippy warning about pointer alignment in casts in
set_thread_id(), matching the existing annotation for set_data().
run_mmap is sufficiently aligned, since it is a mmap-ed region with at
least page alignment.
Fixes this clippy error:
casting from `*mut u8` to a more-strictly-aligned pointer (`*mut
kvm_sys::x86::bindings::kvm_run`) (1 < 8 bytes)
BUG=None
TEST=bin/clippy
Change-Id: I4c33385d081d785002dda2d589eeb3ed10a92bfc
Signed-off-by: Daniel Verkamp <dverkamp@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1896089
Reviewed-by: Zach Reizner <zachr@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
Const and static variables imply a static lifetime, so declaring it
isn't necessary.
Fixes clippy warnings of the form:
Statics have by default a `'static` lifetime
BUG=None
TEST=bin/clippy
Change-Id: I99e63b435b6b2fd5fbce9ef617e89ec114587ad7
Signed-off-by: Daniel Verkamp <dverkamp@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1896087
Reviewed-by: Zach Reizner <zachr@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
Fixes warnings of the form "returning an `Err(_)` with the `?` operator"
from clippy.
BUG=None
TEST=bin/clippy
Change-Id: Ied9c0bfbd71ad825fe88c861160e59db491efdd3
Signed-off-by: Daniel Verkamp <dverkamp@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1896086
Reviewed-by: Zach Reizner <zachr@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
The virtio-blk configuration space has a `seg_max` field that lets the
device inform the driver of the maximum number of segments allowed
within a single request. The Linux virtio block driver assumes that if
the corresponding feature (VIRTIO_BLK_F_SEG_MAX) is not advertised, then
only one segment can be used.
Add a segment limit based on sysconf(_SC_IOV_MAX) to allow the Linux
block stack to make use of multiple segments in a single request, which
will get translated into a single readv/writev call in the crosvm block
device.
BUG=None
TEST=strace crosvm virtio-blk process and note preadv with iov_cnt > 1
Change-Id: Ia14ebebb85daa21e2d43437bb74886f32e6e8187
Signed-off-by: Daniel Verkamp <dverkamp@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1876806
Reviewed-by: Stephen Barber <smbarber@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
The HANDLE_KILLPRIV feature tells the kernel that the file system will
take care of clearing the setuid and setgid bits when a file is written
to by someone other than the owner.
However, this doesn't work when writeback caching is enabled as the
write may be buffered and flushed later, which would prevent the bits
from being cleared on write.
Remove the HANDLE_KILLPRIV feature when writeback caching is enabled.
BUG=b:136128319
TEST=`tast run vm.VirtioFs`
Change-Id: Icef98e878603cc428f83db37857d69bc6da4486c
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1890582
Tested-by: Chirantan Ekbote <chirantan@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
Commit-Queue: Chirantan Ekbote <chirantan@chromium.org>
Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>
Reviewed-by: Stephen Barber <smbarber@chromium.org>
Add a fuzzer for the virtio-fs server, which is responsible for decoding
a byte stream into FUSE messages.
BUG=none
TEST=run it with cros_fuzz
Change-Id: Ic7695f2106d3f81e6cf09b98ffedc51831238f1e
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1865272
Tested-by: Chirantan Ekbote <chirantan@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
Commit-Queue: Chirantan Ekbote <chirantan@chromium.org>
Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>
Reviewed-by: Stephen Barber <smbarber@chromium.org>
A plugin might care to be immediately notified when a write
is made to a port, but it doesn't care to have the VM stopped
while the plugin calls back to resume the VM.
Unfortunately this means that multiple messages can be queued up in the
pipe and read() together by the plugin API. Protobuf's parsing function
doesn't report how many bytes it read, so I've resorted to having crosvm
prefix every message with a length and then have the plugin lib parse
this number. Impact on performance has not been measured.
BUG=b:143294496
TEST=Local build and run of build_test. Verified that new unit
test was executed, exercised the case where multiple msgs are
received together, and completed successfully.
Change-Id: If6ef463e7b4d2e688e649f832a764fa644bf2d36
Signed-off-by: Matt Delco <delco@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1896376
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Stephen Barber <smbarber@chromium.org>
Add some context for debugging failures so it is possible to determine
which register read is failing.
BUG=None
TEST=./build_test.py
Change-Id: I6084971bc6dbd1f7b5d46e6c5d7ba017bb32edc6
Signed-off-by: Daniel Verkamp <dverkamp@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1893637
Reviewed-by: Zach Reizner <zachr@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
This will be used for configuration interrupts as well.
No functional change.
BUG=chromium:854765
TEST=./build_test.py
Change-Id: Iacccfd0a93a5c90783033a8e37598c2683704351
Signed-off-by: Daniel Verkamp <dverkamp@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1898267
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Zide Chen <zide.chen@intel.corp-partner.google.com>
Reviewed-by: Zach Reizner <zachr@chromium.org>
The virtio specification allows the driver to configure a queue's MSI-X
vector to the magic NO_VECTOR value (0xffff); in this case, if MSI-X is
enabled, no interrupt should be delivered (neither MSI-X nor INTx).
BUG=chromium:854765
TEST=./build_test.py
Change-Id: Icb5e82bf9a57ded60fc8c022c4d8630b5ab70dcf
Signed-off-by: Daniel Verkamp <dverkamp@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1898266
Reviewed-by: Zide Chen <zide.chen@intel.corp-partner.google.com>
Reviewed-by: Zach Reizner <zachr@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
The first interrupt_status.fetch_or() operation already sets the
appropriate bit; calling fetch_or() again with the same value is
unnecessary.
In addition, if the interrupt_status field has any bit set (not just the
USED_RING bit), then the interrupt is already pending and we don't need
to trigger it again.
BUG=chromium:854765
TEST=./build_test.py
Change-Id: Iba7fb9b934d062db801f8ba0e743618f9db580ee
Signed-off-by: Daniel Verkamp <dverkamp@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1898045
Reviewed-by: Zide Chen <zide.chen@intel.corp-partner.google.com>
Reviewed-by: Zach Reizner <zachr@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
The virtio specification says that the device must have all queue and
configuration change events unmapped upon reset. The queue MSI-X vector
configuration was already initialized to VIRTIO_MSI_NO_VECTOR (0xffff),
but the device configuration change notification vector was initialized
to 0. Move the constant to the virtio module so it can be used to
initialize the config vector to the correct value.
BUG=chromium:854765
TEST=./build_test.py
Change-Id: Ife1117e54196a898782238a2b81e69b20ac79784
Signed-off-by: Daniel Verkamp <dverkamp@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/crosvm/+/1898044
Reviewed-by: Zide Chen <zide.chen@intel.corp-partner.google.com>
Reviewed-by: Zach Reizner <zachr@chromium.org>
Tested-by: kokoro <noreply+kokoro@google.com>
