September 2020 - Libguestfs - libguestfs List Archives

Error while loading shared libraries: libsbz.so
by Emilian Mitocariu 03 Sep '20

03 Sep '20

Hi, I have a KVM host running ubuntu 18.04 with libguestfs-tools version 1.36.13-1ubuntu3.3 installed from the Ubuntu's repo and when I try to use virt-cat for example on a VM it fails with: libguestfs: error: appliance closed the connection unexpectedly. > libguestfs: error: guestfs_launch failed. After doing "export LIBGUESTFS_DEBUG=1 LIBGUESTFS_TRACE=1" and running the virt-cat command again I get: guestfsd: error while loading shared libraries: libsbz.so: cannot open > shared object file: No such file or directory I've tried to reinstall libguestfs-tools with "apt-get --reinstall install libguestfs-tools", but I still get the same error. Can someone help me fix this?

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Fwd: is there a way to set discard=unmap when using guestmount? (#52)
by Richard W.M. Jones 03 Sep '20

03 Sep '20

----- Forwarded message from braindevices <notifications(a)github.com> ----- Subject: [libguestfs/libguestfs] is there a way to set discard=unmap when using guestmount? (#52) I cannot find anything in the document. This option is very important for dynamic qcow2 disks. Without out this the IO is super slow even on tmpfs only 3MB/s. Subject: Re: [libguestfs/libguestfs] is there a way to set discard=unmap when using guestmount? (#52) Not using guestmount, but it's possible to do it using the API directly and therefore from guestfish, something like this: ``` guestfish <<EOF add disk.img discard:unmap run mount /dev/sda / mount-local /tmp/mp mount-local-run EOF ``` See also: https://rwmj.wordpress.com/2012/03/29/libguestfs-mount-local/ ----- End forwarded message ----- -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com Fedora Windows cross-compiler. Compile Windows programs, test, and build Windows installers. Over 100 libraries supported. http://fedoraproject.org/wiki/MinGW

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[nbdkit PATCH 0/2] ext2 export list tweaks
by Eric Blake 01 Sep '20

01 Sep '20

Applies on top of my pending series for the exportname filter, addressing one of the todo's in that cover letter. Eric Blake (2): filters: Add .export_description wrappers ext2: Supply .list_exports and .default_export filters/ext2/nbdkit-ext2-filter.pod | 3 +- tests/Makefile.am | 16 +++- filters/ext2/ext2.c | 125 +++++++++++++++++++--------- filters/gzip/gzip.c | 40 ++++++--- filters/partition/partition.c | 58 +++++++++---- filters/tar/tar.c | 48 +++++++---- filters/xz/xz.c | 43 +++++++--- tests/test-ext2-exportname.sh | 73 ++++++++++++++++ 8 files changed, 305 insertions(+), 101 deletions(-) create mode 100755 tests/test-ext2-exportname.sh -- 2.28.0

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[nbdkit PATCH v2 0/8] exportname filter
by Eric Blake 01 Sep '20

01 Sep '20

This is a revision of my .default_export work, plus new work on .export_descriptions and a new exportname filter. I think it is now ready to check in. Things I'd still like in 1.22: - the file plugin should implement .list_exports (patch already posted, but it needs rebasing on this series) - the ext2 filter should override .list_exports when in exportname mode - the nbd plugin should be able to use libnbd 1.4 features for .list_exports - more language bindings for new functions (perl, python, ocaml, ...) nice to have, but can be post-release: - the file plugin in dir= mode should have default=none|largest (default behavior none says "" is an error because it is not a file, setting it to largest picks the largest file in the directory for "") - the tar filter should consider an exportname mode - figure out how to let filters open the plugin without a current connection into the filter Eric Blake (8): api: Add .default_export api: Add nbdkit_add_default_export server: Respond to NBD_INFO_NAME request api: Add nbdkit_str[n]dup_intern helper sh, eval: Implement .default_export api: Alter .list_exports api: Add .export_description exportname: New filter docs/nbdkit-filter.pod | 56 ++- docs/nbdkit-plugin.pod | 123 ++++++- docs/nbdkit-protocol.pod | 14 + .../exportname/nbdkit-exportname-filter.pod | 154 ++++++++ filters/ext2/nbdkit-ext2-filter.pod | 5 + filters/log/nbdkit-log-filter.pod | 2 +- plugins/eval/nbdkit-eval-plugin.pod | 6 + plugins/file/nbdkit-file-plugin.pod | 9 +- plugins/sh/nbdkit-sh-plugin.pod | 39 +- include/nbdkit-common.h | 6 + include/nbdkit-filter.h | 13 +- include/nbdkit-plugin.h | 4 +- configure.ac | 2 + filters/exportname/Makefile.am | 67 ++++ tests/Makefile.am | 8 +- server/internal.h | 22 +- server/backend.c | 93 +++-- server/connections.c | 2 +- server/exports.c | 32 +- server/filters.c | 31 +- server/main.c | 26 +- server/nbdkit.syms | 3 + server/plugins.c | 44 ++- server/protocol-handshake-newstyle.c | 87 ++++- server/public.c | 48 +++ server/test-public.c | 9 +- plugins/sh/methods.h | 2 + plugins/cc/cc.c | 73 ++-- plugins/eval/eval.c | 70 ++-- plugins/ondemand/ondemand.c | 11 +- plugins/sh/methods.c | 84 ++++- plugins/sh/sh.c | 70 ++-- plugins/sh/example.sh | 2 +- filters/exportname/exportname.c | 342 ++++++++++++++++++ filters/log/log.c | 18 +- filters/tls-fallback/tls-fallback.c | 60 ++- tests/test-eval-exports.sh | 34 +- tests/test-export-info.sh | 111 ++++++ tests/test-exportname.sh | 184 ++++++++++ tests/test-tls-fallback.sh | 53 ++- tests/test-layers-filter.c | 13 +- tests/test-layers-plugin.c | 8 + tests/test-layers.c | 24 +- TODO | 20 +- 44 files changed, 1790 insertions(+), 294 deletions(-) create mode 100644 filters/exportname/nbdkit-exportname-filter.pod create mode 100644 filters/exportname/Makefile.am create mode 100644 filters/exportname/exportname.c create mode 100755 tests/test-export-info.sh create mode 100755 tests/test-exportname.sh -- 2.28.0

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[nbdkit PATCH 0/2] More language bindings for .list_exports
by Eric Blake 01 Sep '20

01 Sep '20

This picks up python and ocaml. Some of our languages are lacking a number of bindings (for example, lua and perl lack .extents, so I didn't have anything to copy from), and I felt less comfortable with golang and rust. But for python and ocaml, I was able to test a working implementation. Eric Blake (2): python: Implement .list_exports and friends ocaml: Implement .list_exports and friends plugins/python/nbdkit-python-plugin.pod | 25 ++++ tests/Makefile.am | 3 + plugins/ocaml/NBDKit.mli | 9 ++ plugins/ocaml/NBDKit.ml | 17 +++ plugins/ocaml/example.ml | 33 +++-- plugins/ocaml/ocaml.c | 89 ++++++++++++ plugins/python/python.c | 185 ++++++++++++++++++++---- tests/test-python-export-list.sh | 69 +++++++++ tests/python-export-list.py | 54 +++++++ 9 files changed, 444 insertions(+), 40 deletions(-) create mode 100755 tests/test-python-export-list.sh create mode 100644 tests/python-export-list.py -- 2.28.0

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[nbdkit PATCH 0/3] .list_exports in nbd plugin
by Eric Blake 01 Sep '20

01 Sep '20

Another series on top of my exportname filter, marking off another todo bullet point. With this, you can now use the NBD plugin as a transparent passthrough of all export names served by the remote server in both directions (list advertisement server to client, and export name from client to server). Eric Blake (3): nbd: Implement .default_export, .export_description nbd: Add dynamic-export=true option nbd: Implement .list_exports plugins/nbd/nbdkit-nbd-plugin.pod | 30 +++- tests/Makefile.am | 4 + plugins/nbd/nbd.c | 250 +++++++++++++++++++++++++----- tests/test-nbd-dynamic-content.sh | 75 +++++++++ tests/test-nbd-dynamic-list.sh | 162 +++++++++++++++++++ 5 files changed, 482 insertions(+), 39 deletions(-) create mode 100755 tests/test-nbd-dynamic-content.sh create mode 100755 tests/test-nbd-dynamic-list.sh -- 2.28.0

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