Age | Commit message (Collapse) | Author |
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Adds simple introspection for syscall compatibility information to Linux/AMD64.
Syscalls registered in the syscall table now have associated metadata like
name, support level, notes, and URLs to relevant issues.
Syscall information can be exported as a table, JSON, or CSV using the new
'runsc help syscalls' command. Users can use this info to debug and get info
on the compatibility of the version of runsc they are running or to generate
documentation.
PiperOrigin-RevId: 252558304
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SockType isn't specific to unix domain sockets, and the current
definition basically mirrors the linux ABI's definition.
PiperOrigin-RevId: 251956740
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We still only advertise a single NUMA node, and ignore mempolicy
accordingly, but mbind() at least now succeeds and has effects reflected
by get_mempolicy().
Also fix handling of nodemasks: round sizes to unsigned long (as
documented and done by Linux), and zero trailing bits when copying them
out.
PiperOrigin-RevId: 251950859
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We don't actually support core dumps, but some applications want to
get/set dumpability, which still has an effect in procfs.
Lack of support for set-uid binaries or fs creds simplifies things a
bit.
As-is, processes started via CreateProcess (i.e., init and sentryctl
exec) have normal dumpability. I'm a bit torn on whether sentryctl exec
tasks should be dumpable, but at least since they have no parent normal
UID/GID checks should protect them.
PiperOrigin-RevId: 251712714
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The previous commit adds WNOTHREAD support to waitid, so we may as well
complete the upstream change.
Linux added WCLONE, WALL, WNOTHREAD support to waitid(2) in
91c4e8ea8f05916df0c8a6f383508ac7c9e10dba ("wait: allow sys_waitid() to
accept __WNOTHREAD/__WCLONE/__WALL"). i.e., Linux 4.7.
PiperOrigin-RevId: 249560587
Change-Id: Iff177b0848a3f7bae6cb5592e44500c5a942fbeb
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PiperOrigin-RevId: 249537694
Change-Id: Iaa4bca73a2d8341e03064d59a2eb490afc3f80da
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Updates #214
PiperOrigin-RevId: 249483756
Change-Id: I0d3cf4112bed75a863d5eb08c2063fbc506cd875
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Pipe internals are made more efficient by avoiding garbage collection.
A pool is now used that can be shared by all pipes, and buffers are
chained via an intrusive list. The documentation for pipe structures
and methods is also simplified and clarified.
The pipe tests are now parameterized, so that they are run on all
different variants (named pipes, small buffers, default buffers).
The pipe buffer sizes are exposed by fcntl, which is now supported
by this change. A size change test has been added to the suite.
These new tests uncovered a bug regarding the semantics of open
named pipes with O_NONBLOCK, which is also fixed by this CL. This
fix also addresses the lack of the O_LARGEFILE flag for named pipes.
PiperOrigin-RevId: 249375888
Change-Id: I48e61e9c868aedb0cadda2dff33f09a560dee773
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This does not actually implement an efficient splice or sendfile. Rather, it
adds a generic plumbing to the file internals so that this can be added. All
file implementations use the stub fileutil.NoSplice implementation, which
causes sendfile and splice to fall back to an internal copy.
A basic splice system call interface is added, along with a test.
PiperOrigin-RevId: 249335960
Change-Id: Ic5568be2af0a505c19e7aec66d5af2480ab0939b
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Closes #225
PiperOrigin-RevId: 247508791
Change-Id: I04f47cf2770b30043e5a272aba4ba6e11d0476cc
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Updates google/gvisor#206
PiperOrigin-RevId: 245880573
Change-Id: Ifa715e98d47f64b8a32b04ae9378d6cd6bd4025e
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Based on the guidelines at
https://opensource.google.com/docs/releasing/authors/.
1. $ rg -l "Google LLC" | xargs sed -i 's/Google LLC.*/The gVisor Authors./'
2. Manual fixup of "Google Inc" references.
3. Add AUTHORS file. Authors may request to be added to this file.
4. Point netstack AUTHORS to gVisor AUTHORS. Drop CONTRIBUTORS.
Fixes #209
PiperOrigin-RevId: 245823212
Change-Id: I64530b24ad021a7d683137459cafc510f5ee1de9
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PiperOrigin-RevId: 245818639
Change-Id: I03703ef0fb9b6675955637b9fe2776204c545789
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Previously, createAt was eating all errors from FindInode except for EACCES and
proceeding with the creation. This is incorrect, as FindInode can return many
other errors (like ENAMETOOLONG) that should stop creation.
This CL changes createAt to return all errors encountered except for ENOENT,
which we can ignore because we are about to create the thing.
PiperOrigin-RevId: 245773222
Change-Id: I1b317021de70f0550fb865506f6d8147d4aebc56
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For a symbol link to some directory, eg.
`/tmp/symlink -> /tmp/dir`
`fstatat("/tmp/symlink")` should return symbol link data, but
`fstatat("/tmp/symlink/")` (symlink with trailing slash) should return
directory data it points following linux behaviour.
Currently fstatat() a symlink with trailing slash will get "not a
directory" error which is wrong.
Signed-off-by: Wei Zhang <zhangwei198900@gmail.com>
Change-Id: I63469b1fb89d083d1c1255d32d52864606fbd7e2
PiperOrigin-RevId: 244783916
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The MSG_TRUNC flag is set in the msghdr when a message is truncated.
Fixes google/gvisor#200
PiperOrigin-RevId: 244440486
Change-Id: I03c7d5e7f5935c0c6b8d69b012db1780ac5b8456
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I0410 15:40:38.854295 3776 x:0] [ 1] poll_test E poll(0x2b00bfb5c020 [{FD: 0x3 anon_inode:[eventfd], Events: POLLOUT, REvents: ...}], 0x1, 0x1)
I0410 15:40:38.854348 3776 x:0] [ 1] poll_test X poll(0x2b00bfb5c020 [{FD: 0x3 anon_inode:[eventfd], Events: POLLOUT|POLLERR|POLLHUP, REvents: POLLOUT}], 0x1, 0x1) = 0x1 (10.765?s)
PiperOrigin-RevId: 244269879
Change-Id: If07ba54a486fdeaaedfc0123769b78d1da862307
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Current, doPoll copies the user struct pollfd array into a
[]syscalls.PollFD, which contains internal kdefs.FD and
waiter.EventMask types. While these are currently binary-compatible with
the Linux versions, we generally discourage copying directly to internal
types (someone may inadvertantly change kdefs.FD to uint64).
Instead, copy directly to a []linux.PollFD, which will certainly be
binary compatible. Most of syscalls/polling.go is included directly into
syscalls/linux/sys_poll.go, as it can then operate directly on
linux.PollFD. The additional syscalls.PollFD type is providing little
value.
I've also added explicit conversion functions for waiter.EventMask,
which creates the possibility of a different binary format.
PiperOrigin-RevId: 244042947
Change-Id: I24e5b642002a32b3afb95a9dcb80d4acd1288abf
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PiperOrigin-RevId: 243018347
Change-Id: I1e5b80607c1df0747482abea61db7fcf24536d37
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PiperOrigin-RevId: 242978508
Change-Id: I0ea59ac5ba1dd499e87c53f2e24709371048679b
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PiperOrigin-RevId: 242919489
Change-Id: Ie3267b3bcd8a54b54bc16a6556369a19e843376f
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From sendfile spec and also the linux kernel code, we should
limit the count arg to 'MAX_RW_COUNT'. This patch export
'MAX_RW_COUNT' in kernel pkg and use it in the implementation
of sendfile syscall.
Signed-off-by: Li Qiang <pangpei.lq@antfin.com>
Change-Id: I1086fec0685587116984555abd22b07ac233fbd2
PiperOrigin-RevId: 242745831
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Also add kernel.SignalInfoNoInfo, and use it in RLIMIT_FSIZE checks.
PiperOrigin-RevId: 242562428
Change-Id: I4887c0e1c8f5fddcabfe6d4281bf76d2f2eafe90
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https://github.com/google/gvisor/issues/145
PiperOrigin-RevId: 242044115
Change-Id: I8f140fe05e32ecd438b6be218e224e4b7fe05878
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Change-Id: Ibd6d8a1a63826af6e62a0f0669f8f0866c8091b4
PiperOrigin-RevId: 242037969
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Added syscall annotations for unimplemented syscalls for later generation into
reference docs. Annotations are of the form:
@Syscall(<name>, <key:value>, ...)
Supported args and values are:
- arg: A syscall option. This entry only applies to the syscall when given this
option.
- support: Indicates support level
- UNIMPLEMENTED: Unimplemented (implies returns:ENOSYS)
- PARTIAL: Partial support. Details should be provided in note.
- FULL: Full support
- returns: Indicates a known return value. Values are
syscall errors. This is treated as a string so you can use something
like "returns:EPERM or ENOSYS".
- issue: A Github issue number.
- note: A note
Example:
// @Syscall(mmap, arg:MAP_PRIVATE, support:FULL, note:Private memory fully supported)
// @Syscall(mmap, arg:MAP_SHARED, support:UNIMPLEMENTED, issue:123, note:Shared memory not supported)
// @Syscall(setxattr, returns:ENOTSUP, note:Requires file system support)
Annotations should be placed as close to their implementation as possible
(preferrably as part of a supporting function's Godoc) and should be updated as
syscall support changes.
PiperOrigin-RevId: 241697482
Change-Id: I7a846135db124e1271dc5057d788cba82ca312d4
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PiperOrigin-RevId: 241072126
Change-Id: Ib4d9f58f550732ac4c5153d3cf159a5b1a9749da
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PiperOrigin-RevId: 240850187
Change-Id: I1458581b771a1031e47bba439e480829794927b8
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Memfds are simply anonymous tmpfs files with no associated
mounts. Also implementing file seals, which Linux only implements for
memfds at the moment.
PiperOrigin-RevId: 240450031
Change-Id: I31de78b950101ae8d7a13d0e93fe52d98ea06f2f
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PiperOrigin-RevId: 239896221
Change-Id: I0949981fe50c57131c5631cdeb10b225648575c0
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.net sets these flags to -1 and then uses their result, especting it to be
zero.
Does not set actual flags (e.g. MSG_TRUNC), but setting to zero is more correct
than what we did before.
PiperOrigin-RevId: 239657951
Change-Id: I89c5f84bc9b94a2cd8ff84e8ecfea09e01142030
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This is in preparation for improved page cache reclaim, which requires
greater integration between the page cache and page allocator.
PiperOrigin-RevId: 238444706
Change-Id: Id24141b3678d96c7d7dc24baddd9be555bffafe4
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PiperOrigin-RevId: 238360231
Change-Id: I5eaf8d26f8892f77d71c7fbd6c5225ef471cedf1
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It is Implemented without the priority inheritance part given
that gVisor defers scheduling decisions to Go runtime and doesn't
have control over it.
PiperOrigin-RevId: 236989545
Change-Id: I714c8ca0798743ecf3167b14ffeb5cd834302560
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Also added unimplemented notification for semctl(2)
commands.
PiperOrigin-RevId: 236340672
Change-Id: I0795e3bd2e6d41d7936fabb731884df426a42478
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PiperOrigin-RevId: 235578698
Change-Id: I608ff5e25eac97f6e1bda058511c1f82b0e3b736
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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
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PiperOrigin-RevId: 232914984
Change-Id: Id2643d7ad8e986ca9be76d860788a71db2674cda
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Nothing reads them and they can simply get stale.
Generated with:
$ sed -i "s/licenses(\(.*\)).*/licenses(\1)/" **/BUILD
PiperOrigin-RevId: 231818945
Change-Id: Ibc3f9838546b7e94f13f217060d31f4ada9d4bf0
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Removing check to RLIMIT_NOFILE in select call.
Adding unit test to select suite to document behavior.
Moving setrlimit class from mlock to a util file for reuse.
Fixing flaky test based on comments from Jamie.
PiperOrigin-RevId: 228726131
Change-Id: Ie9dbe970bbf835ba2cca6e17eec7c2ee6fadf459
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PiperOrigin-RevId: 228428223
Change-Id: I433ba5ffc15ea4c2706ec944901b8269b1f364f8
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PiperOrigin-RevId: 228382827
Change-Id: Ica1d30e0df826bdd77f180a5092b2b735ea5c804
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PiperOrigin-RevId: 226493053
Change-Id: Ia98d1cb6dd0682049e4d907ef69619831de5c34a
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PiperOrigin-RevId: 226387521
Change-Id: I0579ab262320fde6c72d2994dd38437f01a99ea5
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PiperOrigin-RevId: 226224230
Change-Id: Id24c7d3733722fd41d5fe74ef64e0ce8c68f0b12
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Implement pwritev2 and associated unit tests.
Clean up preadv2 unit tests.
Tag RWF_ flags in both preadv2 and pwritev2 with associated bug tickets.
PiperOrigin-RevId: 226222119
Change-Id: Ieb22672418812894ba114bbc88e67f1dd50de620
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Currently mlock() and friends do nothing whatsoever. However, mlocking
is directly application-visible in a number of ways; for example,
madvise(MADV_DONTNEED) and msync(MS_INVALIDATE) both fail on mlocked
regions. We handle this inconsistently: MADV_DONTNEED is too important
to not work, but MS_INVALIDATE is rejected.
Change MM to track mlocked regions in a manner consistent with Linux.
It still will not actually pin pages into host physical memory, but:
- mlock() will now cause sentry memory management to precommit mlocked
pages.
- MADV_DONTNEED and MS_INVALIDATE will interact with mlocked pages as
described above.
PiperOrigin-RevId: 225861605
Change-Id: Iee187204979ac9a4d15d0e037c152c0902c8d0ee
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