Age | Commit message (Collapse) | Author |
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PiperOrigin-RevId: 284892289
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Some versions of glibc will convert F_GETOWN fcntl(2) calls into F_GETOWN_EX in
some cases.
PiperOrigin-RevId: 284089373
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This involves allowing getsockopt/setsockopt for the corresponding socket
options, as well as allowing hostinet to process control messages received from
the actual recvmsg syscall.
PiperOrigin-RevId: 282851425
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In glibc, some structures are defined differently on different
platforms.
Such as: C.struct_stat
Signed-off-by: Bin Lu <bin.lu@arm.com>
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PiperOrigin-RevId: 276380008
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Like (AF_INET, SOCK_RAW) sockets, AF_PACKET sockets require CAP_NET_RAW. With
runsc, you'll need to pass `--net-raw=true` to enable them.
Binding isn't supported yet.
PiperOrigin-RevId: 275909366
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PiperOrigin-RevId: 275139066
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This proc file reports routing information to applications inside the
container.
Signed-off-by: Jianfeng Tan <henry.tjf@antfin.com>
Change-Id: I498e47f8c4c185419befbb42d849d0b099ec71f3
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In Linux (include/linux/types.h), mode_t is an unsigned short.
PiperOrigin-RevId: 272956350
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Note that the exact semantics for these signalfds are slightly different from
Linux. These signalfds are bound to the process at creation time. Reads, polls,
etc. are all associated with signals directed at that task. In Linux, all
signalfd operations are associated with current, regardless of where the
signalfd originated.
In practice, this should not be an issue given how signalfds are used. In order
to fix this however, we will need to plumb the context through all the event
APIs. This gets complicated really quickly, because the waiter APIs are all
netstack-specific, and not generally exposed to the context. Probably not
worthwhile fixing immediately.
PiperOrigin-RevId: 269901749
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They are no-ops, so the standard rule works fine.
PiperOrigin-RevId: 268776264
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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: 263637194
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PiperOrigin-RevId: 263040624
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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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Signed-off-by: Haibo Xu <haibo.xu@arm.com>
Change-Id: I1dbd23bb240cca71d0cc30fc75ca5be28cb4c37c
PiperOrigin-RevId: 262619519
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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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Implements support for RTM_GETROUTE requests for netlink sockets.
Fixes #507
PiperOrigin-RevId: 261051045
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PiperOrigin-RevId: 259437060
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PiperOrigin-RevId: 259376740
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Major differences from the current ("v1") sentry VFS:
- Path resolution is Filesystem-driven (FilesystemImpl methods call
vfs.ResolvingPath methods) rather than VFS-driven (fs package owns a
Dirent tree and calls fs.InodeOperations methods to populate it). This
drastically improves performance, primarily by reducing overhead from
inefficient synchronization and indirection. It also makes it possible
to implement remote filesystem protocols that translate FS system calls
into single RPCs, rather than having to make (at least) one RPC per path
component, significantly reducing the latency of remote filesystems
(especially during cold starts and for uncacheable shared filesystems).
- Mounts are correctly represented as a separate check based on
contextual state (current mount) rather than direct replacement in a
fs.Dirent tree. This makes it possible to support (non-recursive) bind
mounts and mount namespaces.
Included in this CL is fsimpl/memfs, an incomplete in-memory filesystem
that exists primarily to demonstrate intended filesystem implementation
patterns and for benchmarking:
BenchmarkVFS1TmpfsStat/1-6 3000000 497 ns/op
BenchmarkVFS1TmpfsStat/2-6 2000000 676 ns/op
BenchmarkVFS1TmpfsStat/3-6 2000000 904 ns/op
BenchmarkVFS1TmpfsStat/8-6 1000000 1944 ns/op
BenchmarkVFS1TmpfsStat/64-6 100000 14067 ns/op
BenchmarkVFS1TmpfsStat/100-6 50000 21700 ns/op
BenchmarkVFS2MemfsStat/1-6 10000000 197 ns/op
BenchmarkVFS2MemfsStat/2-6 5000000 233 ns/op
BenchmarkVFS2MemfsStat/3-6 5000000 268 ns/op
BenchmarkVFS2MemfsStat/8-6 3000000 477 ns/op
BenchmarkVFS2MemfsStat/64-6 500000 2592 ns/op
BenchmarkVFS2MemfsStat/100-6 300000 4045 ns/op
BenchmarkVFS1TmpfsMountStat/1-6 2000000 679 ns/op
BenchmarkVFS1TmpfsMountStat/2-6 2000000 912 ns/op
BenchmarkVFS1TmpfsMountStat/3-6 1000000 1113 ns/op
BenchmarkVFS1TmpfsMountStat/8-6 1000000 2118 ns/op
BenchmarkVFS1TmpfsMountStat/64-6 100000 14251 ns/op
BenchmarkVFS1TmpfsMountStat/100-6 100000 22397 ns/op
BenchmarkVFS2MemfsMountStat/1-6 5000000 317 ns/op
BenchmarkVFS2MemfsMountStat/2-6 5000000 361 ns/op
BenchmarkVFS2MemfsMountStat/3-6 5000000 387 ns/op
BenchmarkVFS2MemfsMountStat/8-6 3000000 582 ns/op
BenchmarkVFS2MemfsMountStat/64-6 500000 2699 ns/op
BenchmarkVFS2MemfsMountStat/100-6 300000 4133 ns/op
From this we can infer that, on this machine:
- Constant cost for tmpfs stat() is ~160ns in VFS2 and ~280ns in VFS1.
- Per-path-component cost is ~35ns in VFS2 and ~215ns in VFS1, a
difference of about 6x.
- The cost of crossing a mount boundary is about 80ns in VFS2
(MemfsMountStat/1 does approximately the same amount of work as
MemfsStat/2, except that it also crosses a mount boundary). This is an
inescapable cost of the separate mount lookup needed to support bind
mounts and mount namespaces.
PiperOrigin-RevId: 258853946
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PiperOrigin-RevId: 258657913
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PiperOrigin-RevId: 258645957
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PiperOrigin-RevId: 257293198
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These are unfortunately unused and unmaintained. They can be brought back in
the future if need requires it.
PiperOrigin-RevId: 255697132
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Addresses obvious typos, in the documentation only.
COPYBARA_INTEGRATE_REVIEW=https://github.com/google/gvisor/pull/443 from Pixep:fix/documentation-spelling 4d0688164eafaf0b3010e5f4824b35d1e7176d65
PiperOrigin-RevId: 255477779
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We don't have the plumbing for btime yet, so that field is left off. The
returned mask indicates that btime is absent.
Fixes #343
PiperOrigin-RevId: 254575752
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