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| author | Paolo Bonzini <pbonzini@redhat.com> | 2017-08-22 06:50:18 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2017-09-22 21:07:24 +0200 |
| commit | b855f8d175a0a26c9798cbc5962bb8c0d9538231 (patch) | |
| tree | 06ef9b853e3700eb33aaccd9ffba4c0922baaf42 /scsi/utils.c | |
| parent | 7c9e527659c67d4d7b41d9504f93d2d7ee482488 (diff) | |
| download | focaccia-qemu-b855f8d175a0a26c9798cbc5962bb8c0d9538231.tar.gz focaccia-qemu-b855f8d175a0a26c9798cbc5962bb8c0d9538231.zip | |
scsi: build qemu-pr-helper
Introduce a privileged helper to run persistent reservation commands. This lets virtual machines send persistent reservations without using CAP_SYS_RAWIO or out-of-tree patches. The helper uses Unix permissions and SCM_RIGHTS to restrict access to processes that can access its socket and prove that they have an open file descriptor for a raw SCSI device. The next patch will also correct the usage of persistent reservations with multipath devices. It would also be possible to support for Linux's IOC_PR_* ioctls in the future, to support NVMe devices. For now, however, only SCSI is supported. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'scsi/utils.c')
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