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Re: [PATCH v2 00/17] live update and gnttab patches


  • To: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
  • From: Edwin Torok <edvin.torok@xxxxxxxxxx>
  • Date: Tue, 11 May 2021 18:12:04 +0000
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  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
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  • Thread-topic: [PATCH v2 00/17] live update and gnttab patches

On Tue, 2021-05-11 at 19:05 +0100, Edwin Török wrote:
> These patches have been posted previously.

A git tree is available here for easier reviewing:
https://github.com/edwintorok/xen/pull/2


> The gnttab patches (tools/ocaml/libs/mmap) were not applied at the
> time
> to avoid conflicts with an in-progress XSA.
> The binary format live-update and fuzzing patches were not applied
> because it was too close to the next Xen release freeze.
> 
> The patches depend on each-other: live-update only works correctly
> when the gnttab
> patches are taken too (MFN is not part of the binary live-update
> stream),
> so they are included here as a single series.
> The gnttab patches replaces one use of libxenctrl with stable
> interfaces, leaving one unstable
> libxenctrl interface used by oxenstored.
> 
> The 'vendor external dependencies' may be optional, it is useful to
> be part
> of a patchqueue in a specfile so that you can build everything
> without external dependencies,
> but might as well commit it so everyone has it easily available not
> just XenServer.
> 
> Note that the live-update fuzz test doesn't yet pass, it is still
> able to find bugs.
> However the reduced version with a fixed seed used as a unit test
> does pass,
> so it is useful to have it committed, and further improvements can be
> made later
> as more bugs are discovered and fixed.
> 
> Edwin Török (17):
>   docs/designs/xenstore-migration.md: clarify that deletes are
> recursive
>   tools/ocaml: add unit test skeleton with Dune build system
>   tools/ocaml: vendor external dependencies for convenience
>   tools/ocaml/xenstored: implement the live migration binary format
>   tools/ocaml/xenstored: add binary dump format support
>   tools/ocaml/xenstored: add support for binary format
>   tools/ocaml/xenstored: validate config file before live update
>   Add structured fuzzing unit test
>   tools/ocaml: use common macros for manipulating mmap_interface
>   tools/ocaml/libs/mmap: allocate correct number of bytes
>   tools/ocaml/libs/mmap: Expose stub_mmap_alloc
>   tools/ocaml/libs/mmap: mark mmap/munmap as blocking
>   tools/ocaml/libs/xb: import gnttab stubs from mirage
>   tools/ocaml: safer Xenmmap interface
>   tools/ocaml/xenstored: use gnttab instead of xenctrl's
>     foreign_map_range
>   tools/ocaml/xenstored: don't store domU's mfn of ring page
>   tools/ocaml/libs/mmap: Clean up unused read/write
> 
>  docs/designs/xenstore-migration.md            |    3 +-
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> +++++++++++++++++
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>  .../ocplib-endian/src/le_ocaml_401.ml         |   32 +
>  .../ocplib-endian/src/ne_ocaml_401.ml         |   20 +
>  .../duniverse/ocplib-endian/tests/bench.ml    |  436 +++++
>  .../ocaml/duniverse/ocplib-endian/tests/dune  |   35 +
>  .../duniverse/ocplib-endian/tests/test.ml     |   39 +
>  .../tests/test_bigstring.cppo.ml              |  191 ++
>  .../ocplib-endian/tests/test_bytes.cppo.ml    |  185 ++
>  .../ocplib-endian/tests/test_string.cppo.ml   |  185 ++
>  tools/ocaml/duniverse/result/CHANGES.md       |   15 +
>  tools/ocaml/duniverse/result/LICENSE.md       |   24 +
>  tools/ocaml/duniverse/result/Makefile         |   17 +
>  tools/ocaml/duniverse/result/README.md        |    5 +
>  tools/ocaml/duniverse/result/dune             |   12 +
>  tools/ocaml/duniverse/result/dune-project     |    3 +
>  .../duniverse/result/result-as-alias-4.08.ml  |    2 +
>  .../ocaml/duniverse/result/result-as-alias.ml |    2 +
>  .../duniverse/result/result-as-newtype.ml     |    2 +
>  tools/ocaml/duniverse/result/result.opam      |   18 +
>  tools/ocaml/duniverse/result/which_result.ml  |   14 +
>  tools/ocaml/duniverse/stdlib-shims/CHANGES.md |    5 +
>  tools/ocaml/duniverse/stdlib-shims/LICENSE    |  203 +++
>  tools/ocaml/duniverse/stdlib-shims/README.md  |    2 +
>  .../ocaml/duniverse/stdlib-shims/dune-project |    1 +
>  .../duniverse/stdlib-shims/dune-workspace.dev |   14 +
>  tools/ocaml/duniverse/stdlib-shims/src/dune   |   97 +
>  .../duniverse/stdlib-shims/stdlib-shims.opam  |   24 +
>  tools/ocaml/duniverse/stdlib-shims/test/dune  |    3 +
>  .../ocaml/duniverse/stdlib-shims/test/test.ml |    2 +
>  tools/ocaml/libs/eventchn/dune                |    8 +
>  tools/ocaml/libs/mmap/Makefile                |   19 +-
>  tools/ocaml/libs/mmap/dune                    |   18 +
>  tools/ocaml/libs/mmap/gnt.ml                  |   62 +
>  tools/ocaml/libs/mmap/gnt.mli                 |   87 +
>  tools/ocaml/libs/mmap/gnttab_stubs.c          |  106 ++
>  tools/ocaml/libs/mmap/mmap_stubs.h            |   11 +-
>  tools/ocaml/libs/mmap/xenmmap.ml              |   17 +-
>  tools/ocaml/libs/mmap/xenmmap.mli             |   13 +-
>  tools/ocaml/libs/mmap/xenmmap_stubs.c         |   86 +-
>  tools/ocaml/libs/xb/dune                      |    7 +
>  tools/ocaml/libs/xb/xb.ml                     |   10 +-
>  tools/ocaml/libs/xb/xb.mli                    |    4 +-
>  tools/ocaml/libs/xb/xs_ring_stubs.c           |   14 +-
>  tools/ocaml/libs/xc/dune                      |    9 +
>  tools/ocaml/libs/xc/xenctrl.ml                |    6 +-
>  tools/ocaml/libs/xc/xenctrl.mli               |    5 +-
>  tools/ocaml/libs/xs/dune                      |    4 +
>  tools/ocaml/xen.opam                          |    1 +
>  tools/ocaml/xen.opam.locked                   |  119 ++
>  tools/ocaml/xenstore.opam                     |    1 +
>  tools/ocaml/xenstored.opam                    |   21 +
>  tools/ocaml/xenstored/Makefile                |    4 +-
>  tools/ocaml/xenstored/connection.ml           |   63 +-
>  tools/ocaml/xenstored/disk.ml                 |  319 ++++
>  tools/ocaml/xenstored/domain.ml               |    9 +-
>  tools/ocaml/xenstored/domains.ml              |   13 +-
>  tools/ocaml/xenstored/dune                    |   19 +
>  tools/ocaml/xenstored/parse_arg.ml            |    6 +-
>  tools/ocaml/xenstored/perms.ml                |    2 +
>  tools/ocaml/xenstored/poll.ml                 |    3 +-
>  tools/ocaml/xenstored/process.ml              |   30 +-
>  tools/ocaml/xenstored/store.ml                |    1 +
>  tools/ocaml/xenstored/test/dune               |   23 +
>  tools/ocaml/xenstored/test/generator.ml       |  189 ++
>  tools/ocaml/xenstored/test/gnt.ml             |   52 +
>  tools/ocaml/xenstored/test/model.ml           |  253 +++
>  tools/ocaml/xenstored/test/old/arbitrary.ml   |  261 +++
>  tools/ocaml/xenstored/test/old/gen_paths.ml   |   66 +
>  .../xenstored/test/old/xenstored_test.ml      |  527 ++++++
>  tools/ocaml/xenstored/test/pathtree.ml        |   40 +
>  tools/ocaml/xenstored/test/testable.ml        |  380 ++++
>  tools/ocaml/xenstored/test/types.ml           |  437 +++++
>  .../xenmmap.mli => xenstored/test/xenctrl.ml} |   40 +-
>  tools/ocaml/xenstored/test/xeneventchn.ml     |   50 +
>  tools/ocaml/xenstored/test/xenstored_test.ml  |  147 ++
>  tools/ocaml/xenstored/test/xs_protocol.ml     |  733 ++++++++
>  tools/ocaml/xenstored/transaction.ml          |  119 +-
>  tools/ocaml/xenstored/xenstored.ml            |  224 ++-
>  tools/ocaml/xenstored/xenstored_main.ml       |    1 +
>  301 files changed, 22724 insertions(+), 193 deletions(-)
>  create mode 100644 tools/ocaml/.gitignore
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>  create mode 100644 tools/ocaml/duniverse/crowbar/.gitignore
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>  create mode 100644 tools/ocaml/duniverse/ocplib-
> endian/tests/bench.ml
>  create mode 100644 tools/ocaml/duniverse/ocplib-endian/tests/dune
>  create mode 100644 tools/ocaml/duniverse/ocplib-endian/tests/test.ml
>  create mode 100644 tools/ocaml/duniverse/ocplib-
> endian/tests/test_bigstring.cppo.ml
>  create mode 100644 tools/ocaml/duniverse/ocplib-
> endian/tests/test_bytes.cppo.ml
>  create mode 100644 tools/ocaml/duniverse/ocplib-
> endian/tests/test_string.cppo.ml
>  create mode 100755 tools/ocaml/duniverse/result/CHANGES.md
>  create mode 100755 tools/ocaml/duniverse/result/LICENSE.md
>  create mode 100755 tools/ocaml/duniverse/result/Makefile
>  create mode 100755 tools/ocaml/duniverse/result/README.md
>  create mode 100755 tools/ocaml/duniverse/result/dune
>  create mode 100755 tools/ocaml/duniverse/result/dune-project
>  create mode 100755 tools/ocaml/duniverse/result/result-as-alias-
> 4.08.ml
>  create mode 100755 tools/ocaml/duniverse/result/result-as-alias.ml
>  create mode 100755 tools/ocaml/duniverse/result/result-as-newtype.ml
>  create mode 100755 tools/ocaml/duniverse/result/result.opam
>  create mode 100755 tools/ocaml/duniverse/result/which_result.ml
>  create mode 100644 tools/ocaml/duniverse/stdlib-shims/CHANGES.md
>  create mode 100644 tools/ocaml/duniverse/stdlib-shims/LICENSE
>  create mode 100644 tools/ocaml/duniverse/stdlib-shims/README.md
>  create mode 100644 tools/ocaml/duniverse/stdlib-shims/dune-project
>  create mode 100644 tools/ocaml/duniverse/stdlib-shims/dune-
> workspace.dev
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>  create mode 100644 tools/ocaml/libs/eventchn/dune
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>  create mode 100644 tools/ocaml/libs/mmap/gnt.mli
>  create mode 100644 tools/ocaml/libs/mmap/gnttab_stubs.c
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>  create mode 100644 tools/ocaml/xenstored/test/model.ml
>  create mode 100644 tools/ocaml/xenstored/test/old/arbitrary.ml
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>  create mode 100644 tools/ocaml/xenstored/test/old/xenstored_test.ml
>  create mode 100644 tools/ocaml/xenstored/test/pathtree.ml
>  create mode 100644 tools/ocaml/xenstored/test/testable.ml
>  create mode 100644 tools/ocaml/xenstored/test/types.ml
>  copy tools/ocaml/{libs/mmap/xenmmap.mli =>
> xenstored/test/xenctrl.ml} (54%)
>  create mode 100644 tools/ocaml/xenstored/test/xeneventchn.ml
>  create mode 100644 tools/ocaml/xenstored/test/xenstored_test.ml
>  create mode 100644 tools/ocaml/xenstored/test/xs_protocol.ml
>  create mode 100644 tools/ocaml/xenstored/xenstored_main.ml
> 

 


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