@@ -2851,6 +2851,24 @@ int xc_psr_cat_get_l3_info(xc_interface *xch, uint32_t socket,
bool *cdp_enabled);
#endif
+int xc_xsplice_upload(xc_interface *xch,
+ char *name, char *payload, uint32_t size);
+
+int xc_xsplice_get(xc_interface *xch,
+ char *name,
+ xen_xsplice_status_t *status);
+
+int xc_xsplice_list(xc_interface *xch, unsigned int max, unsigned int start,
+ xen_xsplice_status_t *info, char *name,
+ uint32_t *len, unsigned int *done,
+ unsigned int *left);
+
+int xc_xsplice_apply(xc_interface *xch, char *name, uint32_t timeout);
+int xc_xsplice_revert(xc_interface *xch, char *name, uint32_t timeout);
+int xc_xsplice_unload(xc_interface *xch, char *name, uint32_t timeout);
+int xc_xsplice_check(xc_interface *xch, char *name, uint32_t timeout);
+int xc_xsplice_replace(xc_interface *xch, char *name, uint32_t timeout);
+
#endif /* XENCTRL_H */
/*
@@ -718,6 +718,290 @@ int xc_hvm_inject_trap(
return rc;
}
+int xc_xsplice_upload(xc_interface *xch,
+ char *name,
+ char *payload,
+ uint32_t size)
+{
+ int rc;
+ DECLARE_SYSCTL;
+ DECLARE_HYPERCALL_BOUNCE(payload, size, XC_HYPERCALL_BUFFER_BOUNCE_IN);
+ DECLARE_HYPERCALL_BOUNCE(name, 0 /* adjust later */, XC_HYPERCALL_BUFFER_BOUNCE_IN);
+ xen_xsplice_name_t def_name = { .pad = { 0, 0, 0 } };
+
+ if ( !name || !payload )
+ return -1;
+
+ def_name.size = strlen(name);
+ if ( def_name.size > XEN_XSPLICE_NAME_SIZE )
+ return -1;
+
+ HYPERCALL_BOUNCE_SET_SIZE(name, def_name.size );
+
+ if ( xc_hypercall_bounce_pre(xch, name) )
+ return -1;
+
+ if ( xc_hypercall_bounce_pre(xch, payload) )
+ return -1;
+
+ sysctl.cmd = XEN_SYSCTL_xsplice_op;
+ sysctl.u.xsplice.cmd = XEN_SYSCTL_XSPLICE_UPLOAD;
+ sysctl.u.xsplice.pad = 0;
+ sysctl.u.xsplice.u.upload.size = size;
+ set_xen_guest_handle(sysctl.u.xsplice.u.upload.payload, payload);
+
+ sysctl.u.xsplice.u.upload.name = def_name;
+ set_xen_guest_handle(sysctl.u.xsplice.u.upload.name.name, name);
+
+ rc = do_sysctl(xch, &sysctl);
+
+ xc_hypercall_bounce_post(xch, payload);
+ xc_hypercall_bounce_post(xch, name);
+
+ return rc;
+}
+
+int xc_xsplice_get(xc_interface *xch,
+ char *name,
+ xen_xsplice_status_t *status)
+{
+ int rc;
+ DECLARE_SYSCTL;
+ DECLARE_HYPERCALL_BOUNCE(name, 0 /*adjust later */, XC_HYPERCALL_BUFFER_BOUNCE_IN);
+ xen_xsplice_name_t def_name = { .pad = { 0, 0, 0 } };
+
+ if ( !name )
+ return -1;
+
+ def_name.size = strlen(name);
+ if ( def_name.size > XEN_XSPLICE_NAME_SIZE )
+ return -1;
+
+ HYPERCALL_BOUNCE_SET_SIZE(name, def_name.size );
+
+ if ( xc_hypercall_bounce_pre(xch, name) )
+ return -1;
+
+ sysctl.cmd = XEN_SYSCTL_xsplice_op;
+ sysctl.u.xsplice.cmd = XEN_SYSCTL_XSPLICE_GET;
+ sysctl.u.xsplice.pad = 0;
+
+ sysctl.u.xsplice.u.get.status.state = 0;
+ sysctl.u.xsplice.u.get.status.rc = 0;
+
+ sysctl.u.xsplice.u.get.name = def_name;
+ set_xen_guest_handle(sysctl.u.xsplice.u.get.name.name, name);
+
+ rc = do_sysctl(xch, &sysctl);
+
+ xc_hypercall_bounce_post(xch, name);
+
+ memcpy(status, &sysctl.u.xsplice.u.get.status, sizeof(*status));
+
+ return rc;
+}
+
+int xc_xsplice_list(xc_interface *xch, unsigned int max, unsigned int start,
+ xen_xsplice_status_t *info,
+ char *name, uint32_t *len,
+ unsigned int *done,
+ unsigned int *left)
+{
+ int rc;
+ DECLARE_SYSCTL;
+ DECLARE_HYPERCALL_BOUNCE(info, 0 /* adjust later. */, XC_HYPERCALL_BUFFER_BOUNCE_OUT);
+ DECLARE_HYPERCALL_BOUNCE(name, 0 /* adjust later. */, XC_HYPERCALL_BUFFER_BOUNCE_OUT);
+ DECLARE_HYPERCALL_BOUNCE(len, 0 /* adjust later. */, XC_HYPERCALL_BUFFER_BOUNCE_OUT);
+ uint32_t max_batch_sz, nr;
+ uint32_t version = 0, retries = 0;
+ uint32_t adjust = 0;
+
+ if ( !max || !info || !name || !len )
+ return -1;
+
+ sysctl.cmd = XEN_SYSCTL_xsplice_op;
+ sysctl.u.xsplice.cmd = XEN_SYSCTL_XSPLICE_LIST;
+ sysctl.u.xsplice.pad = 0;
+ sysctl.u.xsplice.u.list.version = 0;
+ sysctl.u.xsplice.u.list.idx = start;
+ sysctl.u.xsplice.u.list.pad = 0;
+
+ max_batch_sz = max;
+
+ *done = 0;
+ *left = 0;
+ do {
+ if ( adjust )
+ adjust = 0; /* Used when adjusting the 'max_batch_sz' or 'retries'. */
+
+ nr = min(max - *done, max_batch_sz);
+
+ sysctl.u.xsplice.u.list.nr = nr;
+ /* Fix the size (may vary between hypercalls). */
+ HYPERCALL_BOUNCE_SET_SIZE(info, nr * sizeof(*info));
+ HYPERCALL_BOUNCE_SET_SIZE(name, nr * sizeof(*name) * XEN_XSPLICE_NAME_SIZE);
+ HYPERCALL_BOUNCE_SET_SIZE(len, nr * sizeof(*len));
+ /* Move the pointer to proper offset into 'info'. */
+ (HYPERCALL_BUFFER(info))->ubuf = info + *done;
+ (HYPERCALL_BUFFER(name))->ubuf = name + (sizeof(*name) * XEN_XSPLICE_NAME_SIZE * *done);
+ (HYPERCALL_BUFFER(len))->ubuf = len + *done;
+ /* Allocate memory. */
+ rc = xc_hypercall_bounce_pre(xch, info);
+ if ( rc )
+ return rc;
+
+ rc = xc_hypercall_bounce_pre(xch, name);
+ if ( rc )
+ {
+ xc_hypercall_bounce_post(xch, info);
+ return rc;
+ }
+ rc = xc_hypercall_bounce_pre(xch, len);
+ if ( rc )
+ {
+ xc_hypercall_bounce_post(xch, info);
+ xc_hypercall_bounce_post(xch, name);
+ return rc;
+ }
+ set_xen_guest_handle(sysctl.u.xsplice.u.list.status, info);
+ set_xen_guest_handle(sysctl.u.xsplice.u.list.name, name);
+ set_xen_guest_handle(sysctl.u.xsplice.u.list.len, len);
+
+ rc = do_sysctl(xch, &sysctl);
+ /*
+ * From here on we MUST call xc_hypercall_bounce. If rc < 0 we
+ * end up doing it (outside the loop), so using a break is OK.
+ */
+ if ( rc < 0 && errno == E2BIG )
+ {
+ if ( max_batch_sz <= 1 )
+ break;
+ max_batch_sz >>= 1;
+ adjust = 1; /* For the loop conditional to let us loop again. */
+ /* No memory leaks! */
+ xc_hypercall_bounce_post(xch, info);
+ xc_hypercall_bounce_post(xch, name);
+ xc_hypercall_bounce_post(xch, len);
+ continue;
+ }
+ else if ( rc < 0 ) /* For all other errors we bail out. */
+ break;
+
+ if ( !version )
+ version = sysctl.u.xsplice.u.list.version;
+
+ if ( sysctl.u.xsplice.u.list.version != version )
+ {
+ /* TODO: retries should be configurable? */
+ if ( retries++ > 3 )
+ {
+ rc = -1;
+ errno = EBUSY;
+ break;
+ }
+ *done = 0; /* Retry from scratch. */
+ version = sysctl.u.xsplice.u.list.version;
+ adjust = 1; /* And make sure we continue in the loop. */
+ /* No memory leaks. */
+ xc_hypercall_bounce_post(xch, info);
+ xc_hypercall_bounce_post(xch, name);
+ xc_hypercall_bounce_post(xch, len);
+ continue;
+ }
+
+ /* We should never hit this, but just in case. */
+ if ( rc > nr )
+ {
+ errno = EINVAL; /* Overflow! */
+ rc = -1;
+ break;
+ }
+ *left = sysctl.u.xsplice.u.list.nr; /* Total remaining count. */
+ /* Copy only up 'rc' of data' - we could add 'min(rc,nr) if desired. */
+ HYPERCALL_BOUNCE_SET_SIZE(info, (rc * sizeof(*info)));
+ HYPERCALL_BOUNCE_SET_SIZE(name, (rc * sizeof(*name) * XEN_XSPLICE_NAME_SIZE));
+ HYPERCALL_BOUNCE_SET_SIZE(len, (rc * sizeof(*len)));
+ /* Bounce the data and free the bounce buffer. */
+ xc_hypercall_bounce_post(xch, info);
+ xc_hypercall_bounce_post(xch, name);
+ xc_hypercall_bounce_post(xch, len);
+ /* And update how many elements of info we have copied into. */
+ *done += rc;
+ /* Update idx. */
+ sysctl.u.xsplice.u.list.idx = *done;
+ } while ( adjust || (*done < max && *left != 0) );
+
+ if ( rc < 0 )
+ {
+ xc_hypercall_bounce_post(xch, len);
+ xc_hypercall_bounce_post(xch, name);
+ xc_hypercall_bounce_post(xch, info);
+ }
+
+ return rc > 0 ? 0 : rc;
+}
+
+static int _xc_xsplice_action(xc_interface *xch,
+ char *name,
+ unsigned int action,
+ uint32_t timeout)
+{
+ int rc;
+ DECLARE_SYSCTL;
+ DECLARE_HYPERCALL_BOUNCE(name, 0 /* adjust later */, XC_HYPERCALL_BUFFER_BOUNCE_IN);
+ xen_xsplice_name_t def_name = { .pad = { 0, 0, 0 } };
+
+ def_name.size = strlen(name);
+
+ if ( def_name.size > XEN_XSPLICE_NAME_SIZE )
+ return -1;
+
+ HYPERCALL_BOUNCE_SET_SIZE(name, def_name.size);
+
+ if ( xc_hypercall_bounce_pre(xch, name) )
+ return -1;
+
+ sysctl.cmd = XEN_SYSCTL_xsplice_op;
+ sysctl.u.xsplice.cmd = XEN_SYSCTL_XSPLICE_ACTION;
+ sysctl.u.xsplice.pad = 0;
+ sysctl.u.xsplice.u.action.cmd = action;
+ sysctl.u.xsplice.u.action.timeout = timeout;
+
+ sysctl.u.xsplice.u.action.name = def_name;
+ set_xen_guest_handle(sysctl.u.xsplice.u.action.name.name, name);
+
+ rc = do_sysctl(xch, &sysctl);
+
+ xc_hypercall_bounce_post(xch, name);
+
+ return rc;
+}
+
+int xc_xsplice_apply(xc_interface *xch, char *name, uint32_t timeout)
+{
+ return _xc_xsplice_action(xch, name, XSPLICE_ACTION_APPLY, timeout);
+}
+
+int xc_xsplice_revert(xc_interface *xch, char *name, uint32_t timeout)
+{
+ return _xc_xsplice_action(xch, name, XSPLICE_ACTION_REVERT, timeout);
+}
+
+int xc_xsplice_unload(xc_interface *xch, char *name, uint32_t timeout)
+{
+ return _xc_xsplice_action(xch, name, XSPLICE_ACTION_UNLOAD, timeout);
+}
+
+int xc_xsplice_check(xc_interface *xch, char *name, uint32_t timeout)
+{
+ return _xc_xsplice_action(xch, name, XSPLICE_ACTION_CHECK, timeout);
+}
+
+int xc_xsplice_replace(xc_interface *xch, char *name, uint32_t timeout)
+{
+ return _xc_xsplice_action(xch, name, XSPLICE_ACTION_REPLACE, timeout);
+}
+
/*
* Local variables:
* mode: C