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InodeOperations.Bind now returns a Dirent which will be cached in the Dirent
tree.
When an overlay is in-use, Bind cannot return the Dirent created by the upper
filesystem because the Dirent does not know about the overlay. Instead,
overlayBind must create a new overlay-aware Inode and Dirent and return that.
This is analagous to how Lookup and overlayLookup work.
PiperOrigin-RevId: 208670710
Change-Id: I6390affbcf94c38656b4b458e248739b4853da29
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Previously, an overlay would panic if either the upper or lower fs required
revalidation for a given Dirent. Now, we allow revalidation from the upper
file, but not the lower.
If a cached overlay inode does need revalidation (because the upper needs
revalidation), then the entire overlay Inode will be discarded and a new
overlay Inode will be built with a fresh copy of the upper file.
As a side effect of this change, Revalidate must take an Inode instead of a
Dirent, since an overlay needs to revalidate individual Inodes.
PiperOrigin-RevId: 208293638
Change-Id: Ic8f8d1ffdc09114721745661a09522b54420c5f1
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Previously, processes which used file-system Unix Domain Sockets could not be
checkpoint-ed in runsc because the sockets were saved with their inode
numbers which do not necessarily remain the same upon restore. Now,
the sockets are also saved with their paths so that the new inodes
can be determined for the sockets based on these paths after restoring.
Tests for cases with UDS use are included. Test cleanup to come.
PiperOrigin-RevId: 208268781
Change-Id: Ieaa5d5d9a64914ca105cae199fd8492710b1d7ec
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PiperOrigin-RevId: 201401727
Change-Id: Ia5589882ba58a00efb522ab372e206b7e8e62aee
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PiperOrigin-RevId: 194583126
Change-Id: Ica1d8821a90f74e7e745962d71801c598c652463
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