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PiperOrigin-RevId: 322859907
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Fixes #3334
PiperOrigin-RevId: 322846384
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Helps in fixing open syscall tests: AppendConcurrentWrite and AppendOnly.
We also now update the file size for seekable special files (regular files)
which we were not doing earlier.
Updates #2923
PiperOrigin-RevId: 322670843
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Updates #173
PiperOrigin-RevId: 322665518
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Temporarily skip these, on bhaskherh@'s advice.
PiperOrigin-RevId: 322664955
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Updates #173
PiperOrigin-RevId: 321690756
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Packet sockets also seem to allow double binding and do not return an error on
linux. This was tested by running the syscall test in a linux namespace as root
and the current test DoubleBind fails@HEAD.
Passes after this change.
Updates #173
PiperOrigin-RevId: 321445137
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gVisor incorrectly returns the wrong ARP type for SIOGIFHWADDR. This breaks
tcpdump as it tries to interpret the packets incorrectly.
Similarly, SIOCETHTOOL is used by tcpdump to query interface properties which
fails with an EINVAL since we don't implement it. For now change it to return
EOPNOTSUPP to indicate that we don't support the query rather than return
EINVAL.
NOTE: ARPHRD types for link endpoints are distinct from NIC capabilities
and NIC flags. In Linux all 3 exist eg. ARPHRD types are stored in dev->type
field while NIC capabilities are more like the device features which can be
queried using SIOCETHTOOL but not modified and NIC Flags are fields that can
be modified from user space. eg. NIC status (UP/DOWN/MULTICAST/BROADCAST) etc.
Updates #2746
PiperOrigin-RevId: 321436525
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PiperOrigin-RevId: 321411758
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Updates #2746
PiperOrigin-RevId: 320757963
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Updates #2746
Fixes #3158
PiperOrigin-RevId: 320497190
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This change gates all FUSE commands (by gating /dev/fuse) behind a runsc
flag. In order to use FUSE commands, use the --fuse flag with the --vfs2
flag. Check if FUSE is enabled by running dmesg in the sandbox.
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- Only use MAXSYMLINKS/2+1 symlinks for each of the interpreter and script
paths in SymlinkLimitRefreshedForInterpreter to tolerate cases where the
original paths (/tmp, /bin, or /bin/echo) themselves contain symlinks.
- Ensure that UnshareFiles performs execve immediately after clone(CLONE_VFORK)
(no heap allocation for ExecveArray/RunfilesPath).
- Use lstat() rather than stat() for the existence check in fs_util's Exists;
the latter will fail if the symlink target does not exist, even if the
symlink does.
PiperOrigin-RevId: 320110156
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RFC 6864 imposes various restrictions on the uniqueness of the IPv4
Identification field for non-atomic datagrams, defined as an IP datagram that
either can be fragmented (DF=0) or is already a fragment (MF=1 or positive
fragment offset). In order to be compliant, the ID field is assigned for all
non-atomic datagrams.
Add a TCP unit test that induces retransmissions and checks that the IPv4
ID field is unique every time. Add basic handling of the IP_MTU_DISCOVER
socket option so that the option can be used to disable PMTU discovery,
effectively setting DF=0. Attempting to set the sockopt to anything other
than disabled will fail because PMTU discovery is currently not implemented,
and the default behavior matches that of disabled.
PiperOrigin-RevId: 320081842
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This change fixes a few things:
- creating sockets using mknod(2) is supported via vfs2
- fsgofer can create regular files via mknod(2)
- mode = 0 for mknod(2) will be interpreted as regular file in vfs2 as well
Updates #2923
PiperOrigin-RevId: 320074267
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Updates #2746
PiperOrigin-RevId: 319887810
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PiperOrigin-RevId: 319827554
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We do not support RWF_SYNC/RWF_DSYNC and probably shouldn't silently accept
them, since the user may incorrectly believe that we are synchronizing I/O.
Remove the pwritev2 test verifying that we support these flags.
gvisor.dev/issue/2601 is the tracking bug for deciding which RWF_.* flags
we need and supporting them.
Updates #2923, #2601.
PiperOrigin-RevId: 319351286
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After we change credentials, it is possible that we no longer have access to
the sticky directory where we are trying to delete files. Use an open fd so
this is not an issue.
PiperOrigin-RevId: 319306255
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PiperOrigin-RevId: 319283715
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- Support FIOASYNC, FIO{SET,GET}OWN, SIOC{G,S}PGRP (refactor getting/setting
owner in the process).
- Unset signal recipient when setting owner with pid == 0 and
valid owner type.
Updates #2923.
PiperOrigin-RevId: 319231420
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-Waddress-of-packed-member warns on inet_aton() being used with a packed struct
member. This was added in cl/291990716.
PiperOrigin-RevId: 319111253
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This includes the provisional style guide in the website and fixes the broken
link from CONTRIBUTING.md. The style guide will be located under the "Community"
category as it's related to contributing to the project.
Also, add missing includes that were causing some presubmits to fail.
PiperOrigin-RevId: 319061410
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Closes #2768
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Bring udp_socket_test into complianc by:
- Eliminating IsRunningOnGvisor() invocations.
- Wrapping sockets in RAII FileDescriptor objects.
- Creating a Bind() method so that the first bind happens on port 0.
PiperOrigin-RevId: 318909396
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Also make some fixes to vfs1's F_SETOWN. The fcntl test now entirely passes
on vfs2.
Fixes #2920.
PiperOrigin-RevId: 318669529
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Updates #2923.
PiperOrigin-RevId: 318648128
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PiperOrigin-RevId: 318585377
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IPv6 raw sockets never include the IPv6 header.
PiperOrigin-RevId: 318582989
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SO_NO_CHECK is used to skip the UDP checksum generation on a TX socket
(UDP checksum is optional on IPv4).
Test:
- TestNoChecksum
- SoNoCheckOffByDefault (UdpSocketTest)
- SoNoCheck (UdpSocketTest)
Fixes #3055
PiperOrigin-RevId: 318575215
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PiperOrigin-RevId: 318563543
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Also, while we're here, make sure that gofer inotify events are generated when
files are created in remote revalidating mode.
Updates #1479.
PiperOrigin-RevId: 318536354
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This change adds a FUSE character device backed by devtmpfs. This
device will be used to establish a connection between the FUSE
server daemon and fusefs. The FileDescriptionImpl methods will
be implemented as we flesh out fusefs some more. The tests assert
that the device can be opened and used.
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- Support writing on proc/[pid]/{uid,gid}map
- Return EIO for writing to static files.
Updates #2923.
PiperOrigin-RevId: 318188503
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PiperOrigin-RevId: 318180382
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For TCP sockets, SO_REUSEADDR relaxes the rules for binding addresses.
gVisor/netstack already supported a behavior similar to SO_REUSEADDR, but did
not allow disabling it. This change brings the SO_REUSEADDR behavior closer to
the behavior implemented by Linux and adds a new SO_REUSEADDR disabled
behavior. Like Linux, SO_REUSEADDR is now disabled by default.
PiperOrigin-RevId: 317984380
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Events were only skipped on parent directories after their children were
unlinked; events on the unlinked file itself need to be skipped as well.
As a result, all Watches.Notify() calls need to know whether the dentry where
the call came from was unlinked.
Updates #1479.
PiperOrigin-RevId: 317979476
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PiperOrigin-RevId: 317973144
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Because there is no inode structure stored in the sandbox, inotify watches
must be held on the dentry. This would be an issue in the presence of hard
links, where multiple dentries would need to share the same set of watches,
but in VFS2, we do not support the internal creation of hard links on gofer
fs. As a result, we make the assumption that every dentry corresponds to a
unique inode.
Furthermore, dentries can be cached and then evicted, even if the underlying
file has not be deleted. We must prevent this from occurring if there are any
watches that would be lost. Note that if the dentry was deleted or invalidated
(d.vfsd.IsDead()), we should still destroy it along with its watches.
Additionally, when a dentry’s last watch is removed, we cache it if it also
has zero references. This way, the dentry can eventually be evicted from
memory if it is no longer needed. This is accomplished with a new dentry
method, OnZeroWatches(), which is called by Inotify.RmWatch and
Inotify.Release. Note that it must be called after all inotify locks are
released to avoid violating lock order. Stress tests are added to make sure
that inotify operations don't deadlock with gofer.OnZeroWatches.
Updates #1479.
PiperOrigin-RevId: 317958034
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Per manual page:
"All applications must properly handle a return of DT_UNKNOWN."
PiperOrigin-RevId: 317957013
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Updates #2923.
PiperOrigin-RevId: 317700049
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Despite what the man page says, linux will return EINVAL when calling
getdents() an a /proc/[tid]/net file corresponding to a zombie task. This
causes readdir() to return a null pointer AND errno=EINVAL.
See fs/proc/proc_net.c:proc_tgid_net_readdir() for where this occurs.
We have tests that recursively read /proc, and are likely to hit this when
running natively, so we must catch and handle this case.
PiperOrigin-RevId: 317674168
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Updates #2923.
PiperOrigin-RevId: 317246916
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Updates #2972
PiperOrigin-RevId: 317113059
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Updates #173,#6
Fixes #2888
PiperOrigin-RevId: 317087652
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PiperOrigin-RevId: 316974863
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The test was expecting that the root mount pathname was "/", but it doesn't
need to be. Only the mount point actually should be "/" (otherwise it is not
the root).
PiperOrigin-RevId: 316968025
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Different flavors of linux seem to use different defaults we accept 64
or 127 as the TtlDefault in the test.
PiperOrigin-RevId: 316961150
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