The final merged patch in Linux 4.10,
4ab1586488cb56ed8728e54c4157cc38646874d9 ("x86/cpufeature: Add RDT CPUID
feature bits") named this feature "rdt_a". Earlier patch sets had named
this "rdt".
PiperOrigin-RevId: 234680481
Change-Id: I0cc968201ec9a2825701405e207994a7331322b7
- Use new user namespace for namespace creation checks.
- Ensure userns is never nil since it's used by other namespaces.
PiperOrigin-RevId: 234673175
Change-Id: I4b9d9d1e63ce4e24362089793961a996f7540cd9
In addition to simplifying the implementation, this fixes two bugs:
- seqfile.NewSeqFile unconditionally creates an inode with mode 0444,
but {uid,gid}_map have mode 0644.
- idMapSeqFile.Write implements fs.FileOperations.Write ... but it
doesn't implement any other fs.FileOperations methods and is never
used as fs.FileOperations. idMapSeqFile.GetFile() =>
seqfile.SeqFile.GetFile() uses seqfile.seqFileOperations instead,
which rejects all writes.
PiperOrigin-RevId: 234638212
Change-Id: I4568f741ab07929273a009d7e468c8205a8541bc
This allows setting a default send interface for IPv4 multicast. IPv6 support
will come later.
PiperOrigin-RevId: 234251379
Change-Id: I65922341cd8b8880f690fae3eeb7ddfa47c8c173
SO_TIMESTAMP is reimplemented in ping and UDP sockets (and needs to be added for
TCP), but can just be implemented in epsocket for simplicity. This will also
make SIOCGSTAMP easier to implement.
PiperOrigin-RevId: 234179300
Change-Id: Ib5ea0b1261dc218c1a8b15a65775de0050fe3230
If a background process tries to read from a TTY, linux sends it a SIGTTIN
unless the signal is blocked or ignored, or the process group is an orphan, in
which case the syscall returns EIO.
See drivers/tty/n_tty.c:n_tty_read()=>job_control().
If a background process tries to write a TTY, set the termios, or set the
foreground process group, linux then sends a SIGTTOU. If the signal is ignored
or blocked, linux allows the write. If the process group is an orphan, the
syscall returns EIO.
See drivers/tty/tty_io.c:tty_check_change().
PiperOrigin-RevId: 234044367
Change-Id: I009461352ac4f3f11c5d42c43ac36bb0caa580f9
We need to update the package lists, otherwise apt-get
install can request an old package which has been
removed from repositories.
PiperOrigin-RevId: 233879031
Change-Id: I2e1b3afd9d01008f774f10efd8852fd3f5e1c882
PACKET_RX_RING allows the use of an mmapped buffer to receive packets from the
kernel. This should cut down the number of host syscalls that need to be made
to receive packets when the underlying fd is a socket of the AF_PACKET type.
PiperOrigin-RevId: 233834998
Change-Id: I8060025c6ced206986e94cc46b8f382b81bfa47f
- Fix CopyIn/CopyOut/ZeroOut range checks.
- Include the faulting signal number in the panic message.
PiperOrigin-RevId: 233829501
Change-Id: I8959ead12d05dbd4cd63c2b908cddeb2a27eb513
Linux started doing this in b8be15d588060a03569ac85dc4a0247460988f5b
("x86/fpu/xstate: Re-enable XSAVES"), which first appeared in 4.8.
PiperOrigin-RevId: 233800931
Change-Id: Icac2c2b03ccf1a91f3070431efb5152ca619fca3
RFC7323 recommends that if the timestamp option was negotiated
then all packets should carry a TCP Timestamp and any packets that
do not should be dropped.
Netstack implemented this behaviour. Linux OTOH does not and will
accept such packets. This change makes Netstack behaviour compatible
with Linux.
Also now that we allow such packets, we do need to update RTO calculations
based on these packets even if timestamp option is enabled.
PiperOrigin-RevId: 233432268
Change-Id: I9f4742ae6b63930ac3b5e37d8c238761e6a4b29f
fs/gofer/inodeOperations.Release does some asynchronous work. Previously it
was calling fs.Async with an anonymous function, which caused the function to
be allocated on the heap. Because Release is relatively hot, this results in a
lot of small allocations and increased GC pressure, noticeable in perf profiles.
This CL adds a new function, AsyncWithContext, which is just like Async, but
passes a context to the async function. It avoids the need for an extra
anonymous function in fs/gofer/inodeOperations.Release. The Async function
itself still requires a single anonymous function.
PiperOrigin-RevId: 233141763
Change-Id: I1dce4a883a7be9a8a5b884db01e654655f16d19c
CopyObjectOut grows its destination byte slice incrementally, causing
many small slice allocations on the heap. This leads to increased GC and
noticeably slower stat calls.
PiperOrigin-RevId: 233140904
Change-Id: Ieb90295dd8dd45b3e56506fef9d7f86c92e97d97
This adds an extra Reflection call to CopyObjectOut, but avoids many small
slice allocations if the object is large, since without this we grow the
backing slice incrementally as we encode more data.
PiperOrigin-RevId: 233110960
Change-Id: I93569af55912391e5471277f779139c23f040147
Prevents URPC FDs from being closed mid-call, especially if they
are used as raw FDs.
PiperOrigin-RevId: 233087955
Change-Id: I815a2ff32cc5f03774605aef0b35a32862f8e633
Also includes a few fixes for IPv4 multicast support. IPv6 support is coming in
a followup CL.
PiperOrigin-RevId: 233008638
Change-Id: If7dae6222fef43fda48033f0292af77832d95e82
It currently allocates a new context on the heap each time it is called. Some
of these are in relatively hot paths like signal delivery and releasing gofer
inodes. It is also called very commonly in afterLoad. All of these should
benefit from fewer heap allocations.
PiperOrigin-RevId: 232938873
Change-Id: I53cec0ca299f56dcd4866b0b4fd2ec4938526849
- Change proc to return envp on overwrite of argv with limitations from
upstream.
- Add unit tests
- Change layout of argv/envp on the stack so that end of argv is contiguous with
beginning of envp.
PiperOrigin-RevId: 232506107
Change-Id: I993880499ab2c1220f6dc456a922235c49304dec
Multiple tests were creating the same directory before removing it, making it
possible for concurrent tests to fail because the directory already exists.
PiperOrigin-RevId: 232389814
Change-Id: I35d409fff4b3fd864b30fee742cb587b14975c23
Dirty should be set only when the attribute is changed in the cache
only. Instances where the change was also sent to the backing file
doesn't need to dirty the attribute.
Also remove size update during WriteOut as writing dirty page would
naturaly grow the file if needed.
RELNOTES: relnotes is needed for the parent CL.
PiperOrigin-RevId: 232068978
Change-Id: I00ba54693a2c7adc06efa9e030faf8f2e8e7f188
This changed required making fsutil.HostMappable use
a backing file to ensure the correct FD would be used
for read/write operations.
RELNOTES: relnotes is needed for the parent CL.
PiperOrigin-RevId: 231836164
Change-Id: I8ae9639715529874ea7d80a65e2c711a5b4ce254
Nothing reads them and they can simply get stale.
Generated with:
$ sed -i "s/licenses(\(.*\)).*/licenses(\1)/" **/BUILD
PiperOrigin-RevId: 231818945
Change-Id: Ibc3f9838546b7e94f13f217060d31f4ada9d4bf0
quoting what "rscheff@gmx.at" pointed out over email.
"IsLost in RFC3517 is defined as >= (DupThresh * SMSS) while
RFC6675 improves upon this, and defines IsLost as >
((DupThresh - 1) * SMSS + 1).
The latter addresses situations where partial segments (size < MSS)
are sent (eg. last segment of a http protocol message sent with PSH
being less than MSS is common)."
PiperOrigin-RevId: 231512331
Change-Id: I1addd4a92e3e7baeb0bdda46463ebfae435da958