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PiperOrigin-RevId: 329526153
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As documented for gofer.dentry.hostFD.
PiperOrigin-RevId: 329372319
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Implement walk directories in gvisor verity file system. For each step,
the child dentry is verified against a verified parent root hash.
PiperOrigin-RevId: 329358747
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PiperOrigin-RevId: 329349158
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PiperOrigin-RevId: 329036994
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An earlier change considered the loopback bound to all addresses in an
assigned subnet. This should have only be done for IPv4 to maintain
compatability with Linux:
```
$ ip addr show dev lo
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group ...
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
$ ping 2001:db8::1
PING 2001:db8::1(2001:db8::1) 56 data bytes
^C
--- 2001:db8::1 ping statistics ---
4 packets transmitted, 0 received, 100% packet loss, time 3062ms
$ ping 2001:db8::2
PING 2001:db8::2(2001:db8::2) 56 data bytes
^C
--- 2001:db8::2 ping statistics ---
3 packets transmitted, 0 received, 100% packet loss, time 2030ms
$ sudo ip addr add 2001:db8::1/64 dev lo
$ ping 2001:db8::1
PING 2001:db8::1(2001:db8::1) 56 data bytes
64 bytes from 2001:db8::1: icmp_seq=1 ttl=64 time=0.055 ms
64 bytes from 2001:db8::1: icmp_seq=2 ttl=64 time=0.074 ms
64 bytes from 2001:db8::1: icmp_seq=3 ttl=64 time=0.073 ms
64 bytes from 2001:db8::1: icmp_seq=4 ttl=64 time=0.071 ms
^C
--- 2001:db8::1 ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3075ms
rtt min/avg/max/mdev = 0.055/0.068/0.074/0.007 ms
$ ping 2001:db8::2
PING 2001:db8::2(2001:db8::2) 56 data bytes
From 2001:db8::1 icmp_seq=1 Destination unreachable: No route
From 2001:db8::1 icmp_seq=2 Destination unreachable: No route
From 2001:db8::1 icmp_seq=3 Destination unreachable: No route
From 2001:db8::1 icmp_seq=4 Destination unreachable: No route
^C
--- 2001:db8::2 ping statistics ---
4 packets transmitted, 0 received, +4 errors, 100% packet loss, time 3070ms
```
Test: integration_test.TestLoopbackAcceptAllInSubnet
PiperOrigin-RevId: 329011566
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This mainly involved enabling kernfs' client filesystems to provide a
StatFS implementation.
Fixes #3411, #3515.
PiperOrigin-RevId: 329009864
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The existing implementation for NetworkProtocol.{Set}Option take
arguments of an empty interface type which all types (implicitly)
implement; any type may be passed to the functions.
This change introduces marker interfaces for network protocol options
that may be set or queried which network protocol option types implement
to ensure that invalid types are caught at compile time. Different
interfaces are used to allow the compiler to enforce read-only or
set-only socket options.
PiperOrigin-RevId: 328980359
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Also, add corresponding EOF tests for splice/sendfile.
Discovered by syzkaller.
PiperOrigin-RevId: 328975990
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Reported-by: syzbot+074ec22c42305725b79f@syzkaller.appspotmail.com
PiperOrigin-RevId: 328963899
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This change was already done as of
https://github.com/google/gvisor/commit/1736b2208f but
https://github.com/google/gvisor/commit/a174aa7597 conflicted with that
change and it was missed in reviews.
This change fixes the conflict.
PiperOrigin-RevId: 328920372
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PiperOrigin-RevId: 328863725
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Fixes *.sh Java runtime tests, where splice()-ing from a pipe to /dev/zero
would not actually empty the pipe.
There was no guarantee that the data would actually be consumed on a splice
operation unless the output file's implementation of Write/PWrite actually
called VFSPipeFD.CopyIn. Now, whatever bytes are "written" are consumed
regardless of whether CopyIn is called or not.
Furthermore, the number of bytes in the IOSequence for reads is now capped at
the amount of data actually available. Before, splicing to /dev/zero would
always return the requested splice size without taking the actual available
data into account.
This change also refactors the case where an input file is spliced into an
output pipe so that it follows a similar pattern, which is arguably cleaner
anyway.
Updates #3576.
PiperOrigin-RevId: 328843954
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PiperOrigin-RevId: 328843560
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PiperOrigin-RevId: 328839759
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The existing implementation for {G,S}etSockOpt take arguments of an
empty interface type which all types (implicitly) implement; any
type may be passed to the functions.
This change introduces marker interfaces for socket options that may be
set or queried which socket option types implement to ensure that invalid
types are caught at compile time. Different interfaces are used to allow
the compiler to enforce read-only or set-only socket options.
Fixes #3714.
RELNOTES: n/a
PiperOrigin-RevId: 328832161
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In an upcoming CL, socket option types are made to implement a marker
interface with pointer receivers. Since this results in calling methods
of an interface with a pointer, we incur an allocation when attempting
to get an Endpoint's last error with the current implementation.
When calling the method of an interface, the compiler is unable to
determine what the interface implementation does with the pointer
(since calling a method on an interface uses virtual dispatch at runtime
so the compiler does not know what the interface method will do) so it
allocates on the heap to be safe incase an implementation continues to
hold the pointer after the functioon returns (the reference escapes the
scope of the object).
In the example below, the compiler does not know what b.foo does with
the reference to a it allocates a on the heap as the reference to a may
escape the scope of a.
```
var a int
var b someInterface
b.foo(&a)
```
This change removes the opportunity for that allocation.
RELNOTES: n/a
PiperOrigin-RevId: 328796559
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More implementation+testing to follow.
#3549.
PiperOrigin-RevId: 328770160
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