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This is an internal-only debugging API so may be changed or
removed at any time in the future.
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This internal interface can be used to ensure that certain
operations are atomic.
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This function generalises the existing print_cmdline used to output the qemu
command line to output any given command line, and exports it to other modules.
It also adds a timestamp to the old print_cmdline output for consistency with
guestfs___print_timestamped_message.
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Commit 4963be85 re-introduced networking to the appliance,
but didn't configure the custom network the appliance expects
since we switched to link local addressing. This patch
configures QEMU to use the custom network again.
Note that you still need to use guestfs_set_network (g, 1)
to enable user networking.
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This large commit changes the generator so that optional arguments
can be supported for functions.
The model for arguments (known as the "style") is changed from
(ret, args) to (ret, args, optargs) where optargs is a more limited
list of arguments.
One function has been added which takes optional arguments, it is
"add-drive-opts", modelled as:
(RErr, [String "filename"], #required
[Bool "readonly"; String "format"; String "iface"]) #optional
Note that this function is processed in the library (does not go over
the RPC protocol to the daemon). This has allowed us to simplify
the current implementation by omitting changes related to RPC or the
daemon, although we plan to add these at some point in the future.
From C this function can be called in 3 different ways as in these
examples:
guestfs_add_drive_opts (g, filename,
GUESTFS_ADD_DRIVE_OPTS_READONLY, 1,
GUESTFS_ADD_DRIVE_OPTS_FORMAT, "raw",
-1);
(the argument(s) between 'filename' and '-1' are the optional ones).
guestfs_add_drive_opts_va (g, filename, args);
where 'args' is a va_list. This works like the first version.
struct guestfs_add_drive_opts_argv optargs = {
.bitmask = GUESTFS_ADD_DRIVE_OPTS_READONLY_BITMASK,
.readonly = 1,
}
guestfs_add_drive_opts_argv (g, filename, &optargs);
This last form lets you construct lists of optional arguments, and
is used by guestfish and the language bindings.
In guestfish optional arguments are used like this:
add-drive-opts filename readonly:true
In OCaml these are mapped naturally to OCaml optional arguments, eg:
g#add_drive_opts ~readonly:true filename;
In Perl these are mapped to extra arguments, eg:
$g->add_drive_opts ($filename, readonly => 1);
In Python these are mapped to optional arguments, eg:
g.add_drive_opts ("file", readonly = 1, format = "qcow2")
In Ruby these are mapped to a final hash argument, eg:
g.add_drive_opts("file", {})
g.add_drive_opts("file", :readonly => 1)
g.add_drive_opts("file", :readonly => 1, :iface => "virtio")
In PHP these are mapped to extra parameters. This is not quite
accurate since you cannot omit arbitrary optional parameters, but
there's not much than can be done within the limitations of PHP
as a language.
Unimplemented in: Haskell, C#, Java.
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Be more consistent in allowing the user to override use of the
temporary directory by specifying $TMPDIR. Also prefer P_tmpdir
macro (defined in <stdio.h>) if that is defined, rather than
hard-coding "/tmp" for the fallback location.
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This frees the string containing the name of the appliance
which was previously being leaked during launch.
(Found by valgrind).
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Without this option, qemu will read some defaults from /etc/qemu/
configuration files.
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guestfs_set_network (g, true) enables network support in the appliance.
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This adds support for virtio-serial, and removes all other
vmchannel methods.
Virtio-serial is faster than other methods, and is now widely
available.
I tested this by using the guestfs_upload API on an 83 MB file:
before: 6.12 seconds (14.1 MB/sec)
after: 4.20 seconds (20.6 MB/sec)
(note this is with the current 8K chunk size)
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This changes the method used to build the supermin appliance
to use the new ext2-based appliance supported by latest febootstrap.
The appliance can also be cached, so we avoid rebuilding it
each time it is used.
Mailing list discussion goes into the rationale and details:
https://www.redhat.com/archives/libguestfs/2010-August/msg00028.html
Requires febootstrap >= 2.8.
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This is just code movement.
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This is just code movement.
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This is an update to commit 41f25ab3df5f306ac717fa7a6efd58328d30c1ae.
Internal functions should be named guestfs___* (3 underscores) to
avoid clashing with the implementation of actions (2 underscores).
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We split the library code into these separate files:
- guestfs.c: creating handles, closing handles, handle-related variables
- actions.c: generated library-side stubs for each action
- bindtests.c: generated code to test bindings
- launch.c: launching the appliance
- proto.c: the library side of the daemon communications protocol
This is just code movement.
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