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Add getfd and closefd monitor commands

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Add monitor commands to support passing file descriptors via
SCM_RIGHTS.

getfd assigns the passed file descriptor a name for use with other
monitor commands.

closefd allows passed file descriptors to be closed. If a monitor
command actually uses a named file descriptor, closefd will not be
required.

Signed-off-by: Mark McLoughlin <markmc@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
Mark McLoughlin 2009-07-22 09:11:40 +01:00 • committed by Anthony Liguori
parent 7d1740590b
commit f07918fdff
2 changed files with 87 additions and 0 deletions
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18
qemu-monitor.hx
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@ -626,6 +626,24 @@ ETEXI
STEXI
@item mce @var{cpu} @var{bank} @var{status} @var{mcgstatus} @var{addr} @var{misc}
Inject an MCE on the given CPU (x86 only).
ETEXI
{ "getfd", "s", do_getfd, "getfd name",
"receive a file descriptor via SCM rights and assign it a name" },
STEXI
@item getfd @var{fdname}
If a file descriptor is passed alongside this command using the SCM_RIGHTS
mechanism on unix sockets, it is stored using the name @var{fdname} for
later use by other monitor commands.
ETEXI
{ "closefd", "s", do_closefd, "closefd name",
"close a file descriptor previously passed via SCM rights" },
STEXI
@item closefd @var{fdname}
Close the file descriptor previously assigned to @var{fdname} using the
@code{getfd} command. This is only needed if the file descriptor was never
used by another monitor command.
ETEXI
STEXI