mirror of
https://github.com/xen-project/xen.git
synced 2026-10-29 18:50:05 +01:00
Matthew Barnes
e92a453c8d
Currently, lsevtchn aborts its event channel enumeration when it hits an event channel that is owned by Xen. lsevtchn does not distinguish between different hypercall errors, which results in lsevtchn missing potential relevant event channels with higher port numbers. Use the errno macro to distinguish between hypercall errors, and continue event channel enumeration if the hypercall error is not critical to enumeration. Signed-off-by: Matthew Barnes <matthew.barnes@cloud.com> Reviewed-by: Anthony PERARD <anthony.perard@vates.tech>
83 lines
1.9 KiB
C
83 lines
1.9 KiB
C
#include <err.h>
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#include <stdlib.h>
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#include <stdint.h>
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#include <string.h>
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#include <stdio.h>
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#include <errno.h>
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#include <xenctrl.h>
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int main(int argc, char **argv)
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{
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xc_interface *xch;
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int domid, port, rc;
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xc_evtchn_status_t status;
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domid = (argc > 1) ? strtol(argv[1], NULL, 10) : 0;
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xch = xc_interface_open(0,0,0);
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if ( !xch )
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errx(1, "failed to open control interface");
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for ( port = 0; ; port++ )
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{
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status.dom = domid;
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status.port = port;
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rc = xc_evtchn_status(xch, &status);
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if ( rc < 0 )
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{
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switch ( errno )
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{
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case EACCES: /* Xen-owned evtchn */
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continue;
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case EINVAL: /* Port enumeration has ended */
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rc = 0;
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break;
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default:
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perror("xc_evtchn_status");
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rc = 1;
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break;
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}
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goto out;
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}
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if ( status.status == EVTCHNSTAT_closed )
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continue;
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printf("%4d: VCPU %u: ", port, status.vcpu);
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switch ( status.status )
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{
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case EVTCHNSTAT_unbound:
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printf("Interdomain (Waiting connection) - Remote Domain %u",
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status.u.unbound.dom);
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break;
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case EVTCHNSTAT_interdomain:
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printf("Interdomain (Connected) - Remote Domain %u, Port %u",
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status.u.interdomain.dom, status.u.interdomain.port);
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break;
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case EVTCHNSTAT_pirq:
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printf("Physical IRQ %u", status.u.pirq);
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break;
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case EVTCHNSTAT_virq:
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printf("Virtual IRQ %u", status.u.virq);
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break;
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case EVTCHNSTAT_ipi:
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printf("IPI");
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break;
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default:
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printf("Unknown");
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break;
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}
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printf("\n");
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}
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out:
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xc_interface_close(xch);
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return rc;
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}
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