Age | Commit message (Collapse) | Author |
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When copyUp fails, we attempt to clean up the upper filesystem by removing any
files that have already been copied-up. If the cleanup fails, we panic because
the "overlay filesystem is in an inconsistent state".
This CL adds the original copy-up error to the panic information, to hopefully
make it easier to track down how the overlay filesystem got into the
inconsistent state.
PiperOrigin-RevId: 304053370
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Some extra fields were added to the Mount type to expose necessary data to the
proc filesystem.
PiperOrigin-RevId: 304053361
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PiperOrigin-RevId: 304053357
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In the case of other signals (preemption), inject a normal bounce and
defer the signal until the vCPU has been returned from guest mode.
PiperOrigin-RevId: 303799678
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/proc/[pid]/mount* omit mounts whose mount point is outside the chroot, which
is checked (indirectly) via __d_path().
PiperOrigin-RevId: 303434226
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Both have analogues in Linux:
* struct file_system_type has a char *name field.
* struct super_block keeps a pointer to the file_system_type.
These fields are necessary to support the `filesystem type` field in
/proc/[pid]/mountinfo.
PiperOrigin-RevId: 303434063
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BoundEndpointAt() is needed to support Unix sockets bound at a
file path, corresponding to BoundEndpoint() in VFS1.
Updates #1476.
PiperOrigin-RevId: 303258251
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Using the host-defined file owner matches VFS1. It is more correct to use the
host-defined mode, since the cached value may become out of date. However,
kernfs.Inode.Mode() does not return an error--other filesystems on kernfs are
in-memory so retrieving mode should not fail. Therefore, if the host syscall
fails, we rely on a cached value instead.
Updates #1672.
PiperOrigin-RevId: 303220864
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PiperOrigin-RevId: 303208407
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Analagous to Linux's mount.mnt_id. This ID is displayed in
/proc/[pid]/mountinfo.
PiperOrigin-RevId: 303185564
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This feature will match UID and GID of the packet creator, for locally
generated packets. This match is only valid in the OUTPUT and POSTROUTING
chains. Forwarded packets do not have any socket associated with them.
Packets from kernel threads do have a socket, but usually no owner.
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PiperOrigin-RevId: 303105826
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Updates #1035
PiperOrigin-RevId: 303021328
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Pushing it down requires all implementation to check for
exec individualy which is not maintanable. Making it part
of GenericCheckPermissions add extra cost to everyone that
calls it. So it's better to keep is in
VirtualFilesystem.OpenAt.
Updates #1193
PiperOrigin-RevId: 302982993
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The only test failing now requires socket which is not
available in VFS2 yet.
Updates #1198
PiperOrigin-RevId: 302976572
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Makes less error prone to find file type.
Updates #1197
PiperOrigin-RevId: 302974244
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PiperOrigin-RevId: 302891559
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This is a precursor to be being able to build an intrusive list
of PacketBuffers for use in queuing disciplines being implemented.
Updates #2214
PiperOrigin-RevId: 302677662
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Fixes #506
PiperOrigin-RevId: 302540404
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PiperOrigin-RevId: 302539171
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PiperOrigin-RevId: 302518924
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utimensat is used by hostfs for setting timestamps on imported fds. Previously,
this would crash the sandbox since utimensat was not allowed.
Correct the VFS2 version of hostfs to match the call in VFS1.
PiperOrigin-RevId: 301970121
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Frozen was to lock down changes to the host filesystem
for hostFS. Now that hostFS is gone, it can be removed.
PiperOrigin-RevId: 301907923
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Also get rid of the readViewHasData as it's not required anymore.
Updates #231, #357
PiperOrigin-RevId: 301837227
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workMu is removed and e.mu is now a mutex that supports TryLock. The packet
processing path tries to lock the mutex and if its locked it will just queue the
packet and move on. The endpoint.UnlockUser() will process any backlog of
packets before unlocking the socket.
This simplifies the locking inside tcp endpoints a lot. Further the
endpoint.LockUser() implements spinning as long as the lock is not held by
another syscall goroutine. This ensures low latency as not spinning leads to the
task thread being put to sleep if the lock is held by the packet dispatch
path. This is suboptimal as the lower layer rarely holds the lock for long so
implementing spinning here helps.
If the lock is held by another task goroutine then we just proceed to call
LockUser() and the task could be put to sleep.
The protocol goroutines themselves just call e.mu.Lock() and block if the
lock is currently not available.
Updates #231, #357
PiperOrigin-RevId: 301808349
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Refactor fs/host.TTYFileOperations so that the relevant functionality can be
shared with VFS2 (fsimpl/host.ttyFD).
Incorporate host.defaultFileFD into the default host.fileDescription. This way,
there is no need for a separate default_file.go. As in vfs1, the TTY file
implementation can be built on top of this default and override operations as
necessary (PRead/Read/PWrite/Write, Release, Ioctl).
Note that these changes still need to be plumbed into runsc, which refers to
imported TTYs in control/proc.go:ExecAsync.
Updates #1672.
PiperOrigin-RevId: 301718157
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PiperOrigin-RevId: 301700868
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It was looking at VFS1 table to determine where to
allocate the next FD from.
Updates #1035
PiperOrigin-RevId: 301678858
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