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This allows the stack to learn remote link addresses on incoming
packets, reducing the need to ARP to send responses.
This also reduces the number of round trips to the system clock,
since that may also prove to be performance-sensitive.
Fixes #739.
PiperOrigin-RevId: 265815816
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PiperOrigin-RevId: 265731735
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When output file is in append mode, sendfile(2) should fail
with EINVAL and not EBADF.
Closes #721
PiperOrigin-RevId: 265718958
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This used to be the case, but regressed after a recent change.
Also made a few fixes around it and clean up the code a bit.
Closes #720
PiperOrigin-RevId: 265717496
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Add missing state transition to LastAck, which should happen when the
endpoint has already recieved a FIN from the remote side, and is
sending its own FIN.
PiperOrigin-RevId: 265568314
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This exposes L1, L2, etc. cache sizes, cache line size, etc.
Across S/R, everything except cache line size can differ from the host. This is
because cache line size is critical for correct use of CLFLUSH / CLFLUSHOPT,
but as far as I know, the other cache parameters can only affect performance,
not correctness.
AMD uses different leafs for cache information, which are not yet supported.
fail. There are no known cases of cache line size other than 64 in the fleet.
PiperOrigin-RevId: 265544786
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PiperOrigin-RevId: 265534854
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This addresses the problem where an endpoint has its address removed but still
has outstanding references held by routes used in connected TCP/UDP sockets
which prevent the removal of the endpoint.
The fix adds a new "expired" flag to the referenced network endpoint, which is
set when an endpoint has its address removed. Incoming packets are not
delivered to an expired endpoint (unless in promiscuous mode), while sending
outgoing packets triggers an error to the caller (unless in spoofing mode).
In addition, a few helper functions were added to stack_test.go to reduce
code duplications.
PiperOrigin-RevId: 265514326
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This is more convenient, since it implements the interface for both
value and pointer.
PiperOrigin-RevId: 265086510
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PiperOrigin-RevId: 264920977
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This fixes the issue of not being able to bind to either a multicast or
broadcast address as well as to send and receive data from it. The way to solve
this is to treat these addresses similar to the ANY address and register their
transport endpoint ID with the global stack's demuxer rather than the NIC's.
That way there is no need to require an endpoint with that multicast or
broadcast address. The stack's demuxer is in fact the only correct one to use,
because neither broadcast- nor multicast-bound sockets care which NIC a
packet was received on (for multicast a join is still needed to receive packets
on a NIC).
I also took the liberty of refactoring udp_test.go to consolidate a lot of
duplicate code and make it easier to create repetitive tests that test the same
feature for a variety of packet and socket types. For this purpose I created a
"flowType" that represents two things: 1) the type of packet being sent or
received and 2) the type of socket used for the test. E.g., a "multicastV4in6"
flow represents a V4-mapped multicast packet run through a V6-dual socket.
This allows writing significantly simpler tests. A nice example is testTTL().
PiperOrigin-RevId: 264766909
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This is the first step in replacing some of the redundant types with the
standard library equivalents.
PiperOrigin-RevId: 264706552
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PiperOrigin-RevId: 264544163
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Document limitation of no reasonable implementation for RWF_HIPRI
flag (High Priority Read/Write for block-based file systems).
PiperOrigin-RevId: 264237589
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PiperOrigin-RevId: 264218306
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We wrongly parses output interface as gateway address.
The fix is straightforward.
Fixes #638
Signed-off-by: Jianfeng Tan <henry.tjf@antfin.com>
Change-Id: Ia4bab31f3c238b0278ea57ab22590fad00eaf061
COPYBARA_INTEGRATE_REVIEW=https://github.com/google/gvisor/pull/684 from tanjianfeng:fix-638 b940e810367ad1273519bfa594f4371bdd293e83
PiperOrigin-RevId: 264211336
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PiperOrigin-RevId: 264180125
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Linux allows to call connect for ANY and the zero port.
PiperOrigin-RevId: 263892534
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Migrates all (except 3) seqfile implementations to the vfs.DynamicBytesSource
interface. There should not be any change in functionality due to this migration
itself.
Please note that the following seqfile implementations have not been migrated:
- /proc/filesystems in proc/filesystems.go
- /proc/[pid]/mountinfo in proc/mounts.go
- /proc/[pid]/mounts in proc/mounts.go
This is because these depend on pending changes in /pkg/senty/vfs.
PiperOrigin-RevId: 263880719
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PiperOrigin-RevId: 263880577
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This adds the same logic to NIC.findEndpoint that is already done in
NIC.getRef. Since this makes the two functions very similar they were combined
into one with the originals being wrappers.
PiperOrigin-RevId: 263864708
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This fixes the implementation ambiguity issues when a filesystem
implementation embeds vfs.DefaultDirectoryFD to its directory FD along
with an internal common fileDescription utility.
For similar reasons also removes FileDescriptionDefaultImpl from
DynamicBytesFileDescriptionImpl.
PiperOrigin-RevId: 263795513
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PiperOrigin-RevId: 263637194
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These errors are always pointers; there's no sense in dereferencing them
in the panic call. Changed one false positive for clarity.
PiperOrigin-RevId: 263611579
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13a98df rearranged some of this code in a way that broke compilation of
the netstack-only export at github.com/google/netstack because
*_state.go files are not included in that export.
This commit moves resumption logic back into *_state.go, fixing the
compilation breakage.
PiperOrigin-RevId: 263601629
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Signed-off-by: Haibo Xu haibo.xu@arm.com
Change-Id: Ib6b4aa2db19032e58bf0395f714e6883caee460a
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Signed-off-by: Haibo Xu haibo.xu@arm.com
Change-Id: Id4489554b9caa332695df8793d361f8332f6a13b
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Signed-off-by: Haibo Xu haibo.xu@arm.com
Change-Id: I2376e502c1a860d5e624c8a8e3afab5da4c53022
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This is in accordance with newer parts of the standard library.
PiperOrigin-RevId: 263449916
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PiperOrigin-RevId: 263436592
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SendMsg before this change would copy all the data over into a
new slice even if the underlying socket could only accept a
small amount of data. This is really inefficient with non-blocking
sockets and under high throughput where large writes could get
ErrWouldBlock or if there was say a timeout associated with the sendmsg()
syscall.
With this change we delay copying bytes in till they are needed and only
copy what can be potentially sent/held in the socket buffer. Reducing
the need to repeatedly copy data over.
Also a minor fix to change state FIN-WAIT-1 when shutdown(..., SHUT_WR) is called
instead of when we transmit the actual FIN. Otherwise the socket could remain in
CONNECTED state even though the user has called shutdown() on the socket.
Updates #627
PiperOrigin-RevId: 263430505
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This replaces fs/proc/seqfile for vfs2-based filesystems.
PiperOrigin-RevId: 263254647
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PiperOrigin-RevId: 263203441
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PiperOrigin-RevId: 263194584
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This better matches the standard library and allows creating connected
PacketConns.
PiperOrigin-RevId: 263187462
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Similar to the EPIPE case, we can return the number of bytes written before
ENOSPC was encountered. If the app tries to write more, we can return ENOSPC on
the next write.
PiperOrigin-RevId: 263041648
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PiperOrigin-RevId: 263040624
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This stub had the wrong function signature.
PiperOrigin-RevId: 262992682
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Now if a process sends an unsupported netlink requests,
an error is returned from the send system call.
The linux kernel works differently in this case. It returns errors in the
nlmsgerr netlink message.
Reported-by: syzbot+571d99510c6f935202da@syzkaller.appspotmail.com
PiperOrigin-RevId: 262690453
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This change just introduces different congestion control states and
ensures the sender.state is updated to reflect the current state
of the connection.
It is not used for any decisions yet but this is required before
algorithms like Eiffel/PRR can be implemented.
Fixes #394
PiperOrigin-RevId: 262638292
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Signed-off-by: Haibo Xu <haibo.xu@arm.com>
Change-Id: I1dbd23bb240cca71d0cc30fc75ca5be28cb4c37c
PiperOrigin-RevId: 262619519
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fsimpl is the keeper of all filesystem implementations in VFS2.
PiperOrigin-RevId: 262617869
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Added benchmark tests which emulate memfs benchmarks.
Stat benchmarks
BenchmarkVFS2Ext4fsStat/1-12 10000000 145 ns/op
BenchmarkVFS2Ext4fsStat/2-12 10000000 170 ns/op
BenchmarkVFS2Ext4fsStat/3-12 10000000 202 ns/op
BenchmarkVFS2Ext4fsStat/8-12 3000000 374 ns/op
BenchmarkVFS2Ext4fsStat/64-12 500000 2159 ns/op
BenchmarkVFS2Ext4fsStat/100-12 300000 3459 ns/op
BenchmarkVFS1TmpfsStat/1-12 5000000 348 ns/op
BenchmarkVFS1TmpfsStat/2-12 3000000 487 ns/op
BenchmarkVFS1TmpfsStat/3-12 2000000 655 ns/op
BenchmarkVFS1TmpfsStat/8-12 1000000 1365 ns/op
BenchmarkVFS1TmpfsStat/64-12 200000 9565 ns/op
BenchmarkVFS1TmpfsStat/100-12 100000 15158 ns/op
BenchmarkVFS2MemfsStat/1-12 10000000 133 ns/op
BenchmarkVFS2MemfsStat/2-12 10000000 155 ns/op
BenchmarkVFS2MemfsStat/3-12 10000000 182 ns/op
BenchmarkVFS2MemfsStat/8-12 5000000 310 ns/op
BenchmarkVFS2MemfsStat/64-12 1000000 1659 ns/op
BenchmarkVFS2MemfsStat/100-12 500000 2787 ns/op
Mount Stat benchmarks
BenchmarkVFS2ExtfsMountStat/1-12 5000000 245 ns/op
BenchmarkVFS2ExtfsMountStat/2-12 5000000 266 ns/op
BenchmarkVFS2ExtfsMountStat/3-12 5000000 304 ns/op
BenchmarkVFS2ExtfsMountStat/8-12 3000000 456 ns/op
BenchmarkVFS2ExtfsMountStat/64-12 500000 2308 ns/op
BenchmarkVFS2ExtfsMountStat/100-12 300000 3482 ns/op
BenchmarkVFS1TmpfsMountStat/1-12 3000000 488 ns/op
BenchmarkVFS1TmpfsMountStat/2-12 2000000 658 ns/op
BenchmarkVFS1TmpfsMountStat/3-12 2000000 806 ns/op
BenchmarkVFS1TmpfsMountStat/8-12 1000000 1514 ns/op
BenchmarkVFS1TmpfsMountStat/64-12 100000 10037 ns/op
BenchmarkVFS1TmpfsMountStat/100-12 100000 15280 ns/op
BenchmarkVFS2MemfsMountStat/1-12 10000000 212 ns/op
BenchmarkVFS2MemfsMountStat/2-12 5000000 232 ns/op
BenchmarkVFS2MemfsMountStat/3-12 5000000 264 ns/op
BenchmarkVFS2MemfsMountStat/8-12 3000000 390 ns/op
BenchmarkVFS2MemfsMountStat/64-12 1000000 1813 ns/op
BenchmarkVFS2MemfsMountStat/100-12 500000 2812 ns/op
PiperOrigin-RevId: 262477158
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Previously we were representing socket addresses as an interface{},
which allowed any type which could be binary.Marshal()ed to be used as
a socket address. This is fine when the address is passed to userspace
via the linux ABI, but is problematic when used from within the sentry
such as by networking procfs files.
PiperOrigin-RevId: 262460640
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Endpoint protocol goroutines were previously started as part of
loading the endpoint. This is potentially too soon, as resources used
by these goroutine may not have been loaded. Protocol goroutines may
perform meaningful work as soon as they're started (ex: incoming
connect) which can cause them to indirectly access resources that
haven't been loaded yet.
This CL defers resuming all protocol goroutines until the end of
restore.
PiperOrigin-RevId: 262409429
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PiperOrigin-RevId: 262402929
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- Unexport Filesystem/Dentry/Inode.
- Support SEEK_CUR in directoryFD.Seek().
- Hold Filesystem.mu before touching directoryFD.off in
directoryFD.Seek().
- Remove deleted Dentries from their parent directory.childLists.
- Remove invalid FIXMEs.
PiperOrigin-RevId: 262400633
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PiperOrigin-RevId: 262264674
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PiperOrigin-RevId: 262249166
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PiperOrigin-RevId: 262242410
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