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ccfc6715cf
Add the helper function cpr_get_fd_param, to use when preserving a file descriptor that is opened externally and passed to QEMU. cpr_get_fd_param returns a descriptor number either from a QEMU command-line parameter, from a getfd command, or from CPR state. When a descriptor is passed to new QEMU via SCM_RIGHTS, its number changes. Hence, during CPR, the command-line parameter is ignored in new QEMU, and over-ridden by the value found in CPR state. Similarly, if the descriptor was originally specified by a getfd command in old QEMU, the fd number is not known outside of QEMU, and it changes when sent to new QEMU via SCM_RIGHTS. Hence the user cannot send getfd to new QEMU, but when the user sends a hotplug command that references the fd, cpr_get_fd_param finds its value in CPR state. Signed-off-by: Steve Sistare <steven.sistare@oracle.com> Reviewed-by: Fabiano Rosas <farosas@suse.de> Link: https://lore.kernel.org/qemu-devel/1751493538-202042-5-git-send-email-steven.sistare@oracle.com Signed-off-by: Cédric Le Goater <clg@redhat.com> |
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| .. | ||
| blocker.h | ||
| client-options.h | ||
| colo.h | ||
| cpr.h | ||
| cpu.h | ||
| failover.h | ||
| global_state.h | ||
| misc.h | ||
| qemu-file-types.h | ||
| register.h | ||
| snapshot.h | ||
| vmstate.h | ||