Has the same effect as Linux commit 34dfde4ad87b ("tcp: Return user_mss for
TCP_MAXSEG in CLOSE/LISTEN state if user_mss set").
Updated test to accept both values (default and user set) so test works on
newer and older kernels.
PiperOrigin-RevId: 563844012
* disable broken socket_inet_loopback test // Lucas Manning
* disable lseek tests on anon inodes. They have been broken by
commit e7478158e1378325907edfdd960eca98a1be405b
Date: Wed Jun 29 15:06:57 2022 +0200
fs: clear or set FMODE_LSEEK based on llseek function
* don't check memory.kmem.limit_in_bytes, it has been deprecated and dropped:
commit 86327e8eb94c52eca4f93cfece2e29d1bf52acbf
Date: Tue Jul 4 13:52:40 2023 +0200
memcg: drop kmem.limit_in_bytes
commit 58056f77502f3567b760c9a8fc8d2e9081515b2d
Date: Fri Nov 5 13:37:44 2021 -0700
memcg, kmem: further deprecate kmem.limit_in_bytes
commit 0158115f702b0ba208ab0b5adf44cae99b3ebcc7
Date: Mon Sep 23 15:37:22 2019 -0700
memcg, kmem: deprecate kmem.limit_in_bytes
PiperOrigin-RevId: 562915457
While there is a difference between flavors of this ioctl (`TCSETS`,
`TCSETSF`, `TCSETSW`), in practice it seems not to matter. We should let
users call `TCSETSF` and can implement those differences if necessary.
This change makes it simpler to write mount tests that examine the optional
field of mountinfo. It also cleans up the mounts in existing tests so they
don't pollute mountinfo after exit.
PiperOrigin-RevId: 561439839
The namespace root mount can't be changed, so let's mount a dummy
read-only tmpfs here. It simplifies creation of containers without
leaking the root file system.
PiperOrigin-RevId: 558301458
`char control[CMSG_SPACE(sizeof(*out_cmsg_value)) + 1];` is not aligned as
cmsghdr. Accessing its member may lead to a -fsanitize=alignment failure.
Align `control` to struct cmsghdr to fix the issue.
PiperOrigin-RevId: 555951052
- Adds methods to Enter, Leave and Migrate the tasks for memory controller.
- Update the memory cgroup id when the task enters and leaves the cgroups.
PiperOrigin-RevId: 555568875
This change implements only the basic functions of mount namespaces.
All features that depends on user namespaces will be implemented separately.
PiperOrigin-RevId: 552673896
This change introduces the nsfs file system. Each new namespace allocates
a new nsfs inode.
Here are reasons why we need these inodes:
* each namespace has to have an unique id.
* proc/pid/ns/ contains one entry for each namespace. Bind mounting one of
the files in this directory to somewhere else in the filesystem keeps the
corresponding namespace alive even if all processes currently in
the namespace terminate.
* setns() allows the calling process to join an existing namespace specified
by a file descriptor.
PiperOrigin-RevId: 550694515
Fixes https://github.com/google/gvisor/issues/6015 | Added EventRdHUp to waiter events | Added POLLRDHUP delivery on half-closed connection detection | Added POLLRDHUP delivery on local read end shutdown
Use infinite timeout when polling on the connecting/connected socket
after the listening socket is closed/shutdown on Fuchsia, as this
particular poll has been observed to be very flaky in Fuchsia Infra.
PiperOrigin-RevId: 546006387
In Linux, oom_adj_write treats an input buffer as a string. It means that
it parses only the part before the first zero byte.
PiperOrigin-RevId: 544711418
This is an optimization that will prevent needless lookups on lower layers for
directories. This is analogous to the Linux commit 97c684cc9110 ("ovl: create
directories inside merged parent opaque").
If mkdir(2) does succeed, then none of the lower layers have a file at that
position, otherwise mkdir(2) would have failed with EEXIST.
Changes on the lower layer underneath a new upper layer directory are not
visible. See the following for example:
```
$ sudo mount -t overlay -o lowerdir=lower,upperdir=upper,workdir=workdir none overlay
$ mkdir -p overlay/dir/dir1
$ mkdir -p lower/dir/dir2
$ ls overlay/dir/
dir1
```
Benchmarking shows that this change cuts ABSL build time by 9.5%!
```
goos: linux
goarch: amd64
cpu: Intel(R) Xeon(R) CPU @ 2.20GHz
│ /tmp/benchout.runsc │ /tmp/benchout.runsc-opt │
│ sec/op │ sec/op vs base │
BuildABSL/page_cache.clean/filesystem.bindfs-8 71.16 ± 12% 64.40 ± 3% -9.50% (p=0.003 n=8)
BuildGRPC/page_cache.clean/filesystem.bindfs-8 418.2 ± 1% 419.9 ± 1% ~ (p=0.721 n=8)
RubySpecTest/page_cache.clean/filesystem.bindfs-8 76.67 ± 5% 75.17 ± 1% ~ (p=0.382 n=8)
geomean 131.6 126.7 -3.78%
│ /tmp/benchout.runsc │ /tmp/benchout.runsc-opt │
│ load.sec │ load.sec vs base │
RubySpecTest/page_cache.clean/filesystem.bindfs-8 12.95 ± 6% 12.80 ± 5% ~ (p=0.625 n=8)
```
PiperOrigin-RevId: 538823897
Add a test that validates that when a UDP packet is received with an
unspecified source address, it is delivered to a listening socket.
PiperOrigin-RevId: 538240044
The utility function used to interpret `EWOULDBLOCK` of a `write` call as
buffers being filled at both the receiver and the sender. This is not a valid
assumption even on Linux because it is possible that the test fills the sender
buffer faster than the socket is able to transfer the bytes, in that case,
EWOULDBLOCK will be observed even before the receiver side has a full buffer.
The fix to this is to inspect the buffer size at the receiver side, and discard
any error before the receiver buffer is full. Then we can use EWOULDBLOCK to
indicate the sender buffer is full.
PiperOrigin-RevId: 538202277
