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PiperOrigin-RevId: 207037226
Change-Id: I8b5f1a056d4f3eab17846f2e0193bb737ecb5428
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PiperOrigin-RevId: 207007153
Change-Id: Ifedf1cc3758dc18be16647a4ece9c840c1c636c9
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When adding MultiDeviceKeys and their values into MultiDevice maps, make
sure the keys and values have not already been added. This ensures that
preexisting key/value pairs are not overridden.
PiperOrigin-RevId: 206942766
Change-Id: I9d85f38eb59ba59f0305e6614a52690608944981
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Currently, there is an attempt to print FD flags, but
they are not decoded into a number, so we see something like this:
/criu # cat /proc/self/fdinfo/0
flags: {%!o(bool=000false)}
Actually, fdinfo has to contain file flags.
Change-Id: Idcbb7db908067447eb9ae6f2c3cfb861f2be1a97
PiperOrigin-RevId: 206794498
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PiperOrigin-RevId: 206659972
Change-Id: I5e0e035f97743b6525ad36bed2c802791609beaf
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This flag will always be true for gVisor files.
PiperOrigin-RevId: 206355963
Change-Id: I2f03d2412e2609042df43b06d1318cba674574d0
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We have been unnecessarily creating too many savable types implicitly.
PiperOrigin-RevId: 206334201
Change-Id: Idc5a3a14bfb7ee125c4f2bb2b1c53164e46f29a8
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When copying-up files from a lower fs to an upper, we also copy the extended
attributes on the file. If there is a (nested) overlay inside the lower, some
of these extended attributes configure the lower overlay, and should not be
copied-up to the upper.
In particular, whiteout attributes in the lower fs overlay should not be
copied-up, since the upper fs may actually contain the file.
PiperOrigin-RevId: 206236010
Change-Id: Ia0454ac7b99d0e11383f732a529cb195ed364062
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PiperOrigin-RevId: 206021774
Change-Id: I447b6c751c28a8d8d4d78468b756b6ad8c61e169
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PiperOrigin-RevId: 205880843
Change-Id: If2272b25f08a18ebe9b6309a1032dd5cdaa59866
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This CL also puts the congestion control logic behind an
interface so that we can easily swap it out for say CUBIC
in the future.
PiperOrigin-RevId: 205732848
Change-Id: I891cdfd17d4d126b658b5faa0c6bd6083187944b
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PiperOrigin-RevId: 205714667
Change-Id: I317a2ca98ac3bdad97c4790fcc61b004757d99ef
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PiperOrigin-RevId: 205440332
Change-Id: I2a838f363e079164c83da88e1b0b8769844fe79b
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PiperOrigin-RevId: 205315612
Change-Id: I9a0a1e32c8abfb7467a38743b82449cc92830316
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The current revalidation logic is very simple and does not do much
introspection of the dirent being revalidated (other than looking at the type
of file).
Fancier revalidation logic is coming soon, and we need to be able to look at
the cached and uncached attributes of a given dirent, and we need a context to
perform some of these operations.
PiperOrigin-RevId: 205307351
Change-Id: If17ea1c631d8f9489c0e05a263e23d7a8a3bf159
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In the general case with an overlay, all mmap calls must go through the
overlay, because in the event of a copy-up, the overlay needs to invalidate any
previously-created mappings.
If there if no lower file, however, there will never be a copy-up, so the
overlay can delegate directly to the upper file in that case.
This also allows us to correctly mmap /dev/zero when it is in an overlay. This
file has special semantics which the overlay does not know about. In
particular, it does not implement Mappable(), which (in the general case) the
overlay uses to detect if a file is mappable or not.
PiperOrigin-RevId: 205306743
Change-Id: I92331649aa648340ef6e65411c2b42c12fa69631
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With musl libc when these entries are missing from the aux vector
it's forcing libc.secure (effectively AT_SECURE). This mode prevents
RPATH and LD_LIBRARY_PATH from working.
https://git.musl-libc.org/cgit/musl/tree/ldso/dynlink.c#n1488
As the first entry is a mask of all the aux fields set:
https://git.musl-libc.org/cgit/musl/tree/ldso/dynlink.c#n187
PiperOrigin-RevId: 205284684
Change-Id: I04de7bab241043306b4f732306a81d74edfdff26
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PiperOrigin-RevId: 205253858
Change-Id: Iccdc493b66d1b4d39de44afb1184952183b1283f
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Docker expects containers to be created before they are restored.
However, gVisor restoring requires specificactions regarding the kernel
and the file system. These actions were originally in booting the sandbox.
Now setting up the file system is deferred until a call to a call to
runsc start. In the restore case, the kernel is destroyed and a new kernel
is created in the same process, as we need the same process for Docker.
These changes required careful execution of concurrent processes which
required the use of a channel.
Full docker integration still needs the ability to restore into the same
container.
PiperOrigin-RevId: 205161441
Change-Id: Ie1d2304ead7e06855319d5dc310678f701bd099f
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Dirent.FullName takes the global renameMu, but can be called during Create,
which itself takes dirent.mu and dirent.dirMu, which is a lock-order violation:
Dirent.Create
d.dirMu.Lock
d.mu.Lock
Inode.Create
gofer.inodeOperations.Create
gofer.NewFile
Dirent.FullName
d.renameMu.RLock
We only use the FullName here for logging, and in this case we can get by with
logging only the BaseName.
A `BaseName` method was added to Dirent, which simply returns the name, taking
d.parent.mu as required.
In the Create pathway, we can't call d.BaseName() because taking d.parent.mu
after d.mu violates the lock order. But we already know the base name of the
file we just created, so that's OK.
In the Open/GetFile pathway, we are free to call d.BaseName() because the other
dirent locks are not held.
PiperOrigin-RevId: 205112278
Change-Id: Ib45c734081aecc9b225249a65fa8093eb4995f10
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Per the doc, usage must be kept maximally merged. Beyond that, it is simply a
good idea to keep fragmentation in usage to a minimum.
The glibc malloc allocator allocates one page at a time, potentially causing
lots of fragmentation. However, those pages are likely to have the same number
of references, often making it possible to merge ranges.
PiperOrigin-RevId: 204960339
Change-Id: I03a050cf771c29a4f05b36eaf75b1a09c9465e14
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PiperOrigin-RevId: 204936533
Change-Id: Ib060920077fc914f97c4a0548a176d1368510c7b
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PiperOrigin-RevId: 204930314
Change-Id: Ifc4c41ed28616cd57fafbf7c92e87141a945c41f
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PiperOrigin-RevId: 204858314
Change-Id: I8252bf8de3232a7a27af51076139b585e73276d4
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If usageSet is heavily fragmented, findUnallocatedRange and findReclaimable
can spend excessive cycles linearly scanning the set for unallocated/free
pages.
Improve common cases by beginning the scan only at the first page that could
possibly contain an unallocated/free page. This metadata only guarantees that
there is no lower unallocated/free page, but a scan may still be required
(especially for multi-page allocations).
That said, this heuristic can still provide significant performance
improvements for certain applications.
PiperOrigin-RevId: 204841833
Change-Id: Ic41ad33bf9537ecd673a6f5852ab353bf63ea1e6
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This method allows an eventfd inside the Sentry to be registered with with
the host kernel.
Update comment about memory mapping host fds via CachingInodeOperations.
PiperOrigin-RevId: 204784859
Change-Id: I55823321e2d84c17ae0f7efaabc6b55b852ae257
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PiperOrigin-RevId: 204508520
Change-Id: I09e5f8b6e69413370e1a0d39dbb7dc1ee0b6192d
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PiperOrigin-RevId: 204490639
Change-Id: I0fe26306bae9320c6aa4f854fe0ef25eebd93233
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We're failing to set eventFile in the outer scope.
PiperOrigin-RevId: 204392995
Change-Id: Ib9b04f839599ef552d7b5951d08223e2b1d5f6ad
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PiperOrigin-RevId: 204372296
Change-Id: If1ed9843b93039806e0c65521f30177dc8036979
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PiperOrigin-RevId: 204362791
Change-Id: If85ea7442741e299f0d7cddbc3d6b415e285da81
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PiperOrigin-RevId: 204356873
Change-Id: I5e2f885f58678e693aae1a69e8bf8084a685af28
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PiperOrigin-RevId: 204355026
Change-Id: I1a8229879ea3b58aa861a4eb4456fd7aff99863d
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PiperOrigin-RevId: 204323728
Change-Id: I1ff9aa062ffa12583b2e38ec94c87db7a3711971
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PiperOrigin-RevId: 204196916
Change-Id: If632750fc6368acb835e22cfcee0ae55c8a04d16
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PiperOrigin-RevId: 204188763
Change-Id: I5596ab7abb3ec9e210a7f57b3fc420e836fa43f3
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PiperOrigin-RevId: 204162313
Change-Id: Ib0593dde88ac33e222c12d0dca6733ef1f1035dc
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PiperOrigin-RevId: 204028082
Change-Id: I4251cce10aace43f9b9a80c36204ef66f1b329df
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Otherwise required and optional can be empty or have negative length.
PiperOrigin-RevId: 204007079
Change-Id: I59e472a87a8caac11ffb9a914b8d79bf0cd70995
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PiperOrigin-RevId: 204006237
Change-Id: Ica8402ab54d9dd7d11cc41c6d74aacef51d140b7
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PiperOrigin-RevId: 203997995
Change-Id: I8974fe74f1582bc9b2622f18a4bc4ab47ff5d622
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PiperOrigin-RevId: 203958972
Change-Id: Ia6fe16547539296d48e2c6731edacdd96bd6e93c
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PiperOrigin-RevId: 203883138
Change-Id: I7500c0a70f5d71c3fb37e2477f7fc466fa92fd3e
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PiperOrigin-RevId: 203880278
Change-Id: I66b790a616de59142859cc12db4781b57ea626d3
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PiperOrigin-RevId: 203849534
Change-Id: I4d81513bfd32e0b7fc40c8a4c194eba7abc35a83
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Fixes #27
PiperOrigin-RevId: 203825288
Change-Id: Ie9f3a2b2c1e296b026b024f75c07da1a7e118633
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Multiple whitespace characters are allowed. This fixes Ubuntu's
/usr/sbin/invoke-rc.d, which has trailing whitespace after the
interpreter which we were treating as an arg.
PiperOrigin-RevId: 203802278
Change-Id: I0a6cdb0af4b139cf8abb22fa70351fe3697a5c6b
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PiperOrigin-RevId: 203499064
Change-Id: I2cd5189638e94ce926f1e82c1264a8d3ece9dfa5
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PiperOrigin-RevId: 203180463
Change-Id: Ief50988c1c028f81ec07a26e704d893e86985bf0
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80bdf8a4068de3ac4a73b6b61a0cdcfe3e3571af accidentally moved vdso into an
inner scope, never assigning the vdso variable passed to the Kernel and
thus skipping VDSO mappings.
Fix this and remove the ability for loadVDSO to skip VDSO mappings,
since tests that do so are gone.
PiperOrigin-RevId: 203169135
Change-Id: Ifd8cadcbaf82f959223c501edcc4d83d05327eba
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