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Check return value of setsockopt call and if it fails print error to the
system log and exit with non-zero value.
Signed-off-by: Tomas Hozza <thozza@redhat.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Check return value of poll call and if it fails print error to the
system log. If errno is EINVAL then exit with non-zero value otherwise
continue the while loop and call poll again.
Signed-off-by: Tomas Hozza <thozza@redhat.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Use errno and strerror() when logging errors to provide more
information.
Signed-off-by: Tomas Hozza <thozza@redhat.com>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
fsreeze does not work for iso9660 filesystems. A ENOSUPP may be caught
in the freeze case, but the subsequent thaw call would fail and leads to
a false error.
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
As suggested by Paolo Bonzini, use ioctl instead of calling fsfreeze.
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
As suggested by Paolo Bonzini, use getmntent instead of parsing output
of mount(1).
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Similar to what commit 95a69adab9acfc3981c504737a2b6578e4d846ef ("tools:
hv: Netlink source address validation allows DoS") does in
hv_kvp_daemon, improve checks for origin of netlink connector message.
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This change fixes a few compile errors:
hv_vss_daemon.c:64:15: warning: unknown escape sequence '\/'
hv_vss_daemon.c:64:15: warning: unknown escape sequence '\/'
hv_vss_daemon.c: In function 'vss_operate':
hv_vss_daemon.c:66: warning: 'return' with no value, in function returning non-void
hv_vss_daemon.c: In function 'main':
hv_vss_daemon.c:130: warning: ignoring return value of 'daemon', declared with attribute warn_unused_result
hv_vss_daemon.c: In function 'vss_operate':
hv_vss_daemon.c:47: warning: 'fs_op' may be used uninitialized in this function
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This driver supports host initiated backup of the guest. On Windows guests,
the host can generate application consistent backups using the Windows VSS
framework. On Linux, we ensure that the backup will be file system consistent.
This driver allows the host to initiate a "Freeze" operation on all the mounted
file systems in the guest. Once the mounted file systems in the guest are frozen,
the host snapshots the guest's file systems. Once this is done, the guest's file
systems are "thawed".
This driver has a user-level component (daemon) that invokes the appropriate
operation on all the mounted file systems in response to the requests from
the host. The duration for which the guest is frozen is very short - a few seconds.
During this interval, the diff disk is comitted.
In this version of the patch I have addressed the feedback from Olaf Herring.
Also, some of the connector related issues have been fixed.
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Reviewed-by: Haiyang Zhang <haiyangz@microsoft.com>
Cc: Evgeniy Polyakov <zbr@ioremap.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
