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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v2 4/5] libxl: change xs path for pv qemu
If QEMU is ran just to provide PV backends, change the xenstore path to
/local/domain/0/device-model/$DOMID/pv.
Add a parameter to libxl__device_model_xs_path to distinguish the device
model from the pv backends provider.
Store the device model binary path under
/local/domain/$DOMID/device-model on xenstore, so that we can fetch it
later and retrieve the list of supported options from
/local/domain/0/libxl/$device_model_binary, introduce in the previous
path.
Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
---
tools/libxl/libxl.c | 2 +-
tools/libxl/libxl_device.c | 2 +-
tools/libxl/libxl_dm.c | 20 ++++++++++++--------
tools/libxl/libxl_dom.c | 12 ++++++------
tools/libxl/libxl_internal.c | 19 +++++++++++++++----
tools/libxl/libxl_internal.h | 5 ++---
tools/libxl/libxl_pci.c | 14 +++++++-------
7 files changed, 44 insertions(+), 30 deletions(-)
diff --git a/tools/libxl/libxl.c b/tools/libxl/libxl.c
index 516713e..bca4c88 100644
--- a/tools/libxl/libxl.c
+++ b/tools/libxl/libxl.c
@@ -1035,7 +1035,7 @@ int libxl_domain_unpause(libxl_ctx *ctx, uint32_t domid)
if (type == LIBXL_DOMAIN_TYPE_HVM) {
uint32_t dm_domid = libxl_get_stubdom_id(ctx, domid);
- path = libxl__device_model_xs_path(gc, dm_domid, domid, "/state");
+ path = libxl__device_model_xs_path(gc, false, dm_domid, domid,
"/state");
state = libxl__xs_read(gc, XBT_NULL, path);
if (state != NULL && !strcmp(state, "paused")) {
libxl__qemu_traditional_cmd(gc, domid, "continue");
diff --git a/tools/libxl/libxl_device.c b/tools/libxl/libxl_device.c
index 93bb41e..aadcd08 100644
--- a/tools/libxl/libxl_device.c
+++ b/tools/libxl/libxl_device.c
@@ -1190,7 +1190,7 @@ int libxl__wait_for_device_model_deprecated(libxl__gc *gc,
char *path;
uint32_t dm_domid = libxl_get_stubdom_id(CTX, domid);
- path = libxl__device_model_xs_path(gc, dm_domid, domid, "/state");
+ path = libxl__device_model_xs_path(gc, false, dm_domid, domid, "/state");
return libxl__xenstore_child_wait_deprecated(gc, domid,
LIBXL_DEVICE_MODEL_START_TIMEOUT,
"Device Model", path, state, spawning,
diff --git a/tools/libxl/libxl_dm.c b/tools/libxl/libxl_dm.c
index b37a84a..29ef8ae 100644
--- a/tools/libxl/libxl_dm.c
+++ b/tools/libxl/libxl_dm.c
@@ -1267,9 +1267,9 @@ void libxl__spawn_stub_dm(libxl__egc *egc,
libxl__stub_dm_spawn_state *sdss)
retry_transaction:
t = xs_transaction_start(ctx->xsh);
xs_mkdir(ctx->xsh, t,
- libxl__device_model_xs_path(gc, dm_domid, guest_domid, ""));
+ libxl__device_model_xs_path(gc, false, dm_domid, guest_domid,
""));
xs_set_permissions(ctx->xsh, t,
- libxl__device_model_xs_path(gc, dm_domid,
+ libxl__device_model_xs_path(gc, false, dm_domid,
guest_domid, ""),
perm, ARRAY_SIZE(perm));
if (!xs_transaction_end(ctx->xsh, t, 0))
@@ -1430,7 +1430,7 @@ static void stubdom_pvqemu_cb(libxl__egc *egc,
sdss->xswait.what = GCSPRINTF("Stubdom %u for %u startup",
dm_domid, sdss->dm.guest_domid);
sdss->xswait.path =
- libxl__device_model_xs_path(gc, dm_domid, sdss->dm.guest_domid,
+ libxl__device_model_xs_path(gc, true, dm_domid, sdss->dm.guest_domid,
"/state");
sdss->xswait.timeout_ms = LIBXL_STUBDOM_START_TIMEOUT * 1000;
sdss->xswait.callback = stubdom_xswait_cb;
@@ -1566,7 +1566,8 @@ void libxl__spawn_local_dm(libxl__egc *egc,
libxl__dm_spawn_state *dmss)
free(path);
}
- path = libxl__device_model_xs_path(gc, LIBXL_TOOLSTACK_DOMID, domid, "");
+ path = libxl__device_model_xs_path(gc, b_info->type ==
LIBXL_DOMAIN_TYPE_PV,
+ LIBXL_TOOLSTACK_DOMID, domid, "");
rwperm[0].id = LIBXL_TOOLSTACK_DOMID;
rwperm[0].perms = XS_PERM_NONE;
rwperm[1].id = domid;
@@ -1595,6 +1596,8 @@ void libxl__spawn_local_dm(libxl__egc *egc,
libxl__dm_spawn_state *dmss)
const char *dom_path = libxl__xs_get_dompath(gc, domid);
spawn->pidpath = GCSPRINTF("%s/%s", dom_path, "image/device-model-pid");
+ libxl__xs_write(gc, XBT_NULL, GCSPRINTF("%s/%s", dom_path,
"device-model"), "%s", dm);
+
if (vnc && vnc->passwd) {
/* This xenstore key will only be used by qemu-xen-traditionnal.
* The code to supply vncpasswd to qemu-xen is later. */
@@ -1619,8 +1622,9 @@ retry_transaction:
LIBXL__LOG(CTX, XTL_DEBUG, " %s", *arg);
spawn->what = GCSPRINTF("domain %d device model", domid);
- spawn->xspath = libxl__device_model_xs_path(gc, LIBXL_TOOLSTACK_DOMID,
- domid, "/state");
+ spawn->xspath = libxl__device_model_xs_path(gc,
+ b_info->type == LIBXL_DOMAIN_TYPE_PV, LIBXL_TOOLSTACK_DOMID,
+ domid, "/state");
spawn->timeout_ms = LIBXL_DEVICE_MODEL_START_TIMEOUT * 1000;
spawn->pidpath = GCSPRINTF("%s/image/device-model-pid", dom_path);
spawn->midproc_cb = libxl__spawn_record_pid;
@@ -1748,7 +1752,7 @@ void libxl__spawn_qdisk_backend(libxl__egc *egc,
libxl__dm_spawn_state *dmss)
dmss->build_state->saved_state = 0;
dmss->spawn.what = GCSPRINTF("domain %u Qdisk backend", domid);
- dmss->spawn.xspath = GCSPRINTF("device-model/%u/state", domid);
+ dmss->spawn.xspath = libxl__device_model_xs_path(gc, true, 0, domid,
"/state");
dmss->spawn.timeout_ms = LIBXL_DEVICE_MODEL_START_TIMEOUT * 1000;
/*
* We cannot save Qemu pid anywhere in the xenstore guest dir,
@@ -1831,7 +1835,7 @@ out:
int libxl__destroy_device_model(libxl__gc *gc, uint32_t domid)
{
- char *path = libxl__device_model_xs_path(gc, LIBXL_TOOLSTACK_DOMID,
+ char *path = libxl__device_model_xs_path(gc, false, LIBXL_TOOLSTACK_DOMID,
domid, "");
if (!xs_rm(CTX->xsh, XBT_NULL, path))
LOG(ERROR, "xs_rm failed for %s", path);
diff --git a/tools/libxl/libxl_dom.c b/tools/libxl/libxl_dom.c
index f408646..8e254a7 100644
--- a/tools/libxl/libxl_dom.c
+++ b/tools/libxl/libxl_dom.c
@@ -1016,7 +1016,7 @@ int libxl__qemu_traditional_cmd(libxl__gc *gc, uint32_t
domid,
{
char *path = NULL;
uint32_t dm_domid = libxl_get_stubdom_id(CTX, domid);
- path = libxl__device_model_xs_path(gc, dm_domid, domid, "/command");
+ path = libxl__device_model_xs_path(gc, false, dm_domid, domid, "/command");
return libxl__xs_write(gc, XBT_NULL, path, "%s", cmd);
}
@@ -1034,7 +1034,7 @@ static inline char *restore_helper(libxl__gc *gc,
uint32_t dm_domid,
uint32_t domid,
uint64_t phys_offset, char *node)
{
- return libxl__device_model_xs_path(gc, dm_domid, domid,
+ return libxl__device_model_xs_path(gc, false, dm_domid, domid,
"/physmap/%"PRIx64"/%s",
phys_offset, node);
}
@@ -1146,9 +1146,9 @@ static void
domain_suspend_switch_qemu_xen_traditional_logdirty
if (!lds->cmd_path) {
uint32_t dm_domid = libxl_get_stubdom_id(CTX, domid);
- lds->cmd_path = libxl__device_model_xs_path(gc, dm_domid, domid,
+ lds->cmd_path = libxl__device_model_xs_path(gc, false, dm_domid, domid,
"/logdirty/cmd");
- lds->ret_path = libxl__device_model_xs_path(gc, dm_domid, domid,
+ lds->ret_path = libxl__device_model_xs_path(gc, false, dm_domid, domid,
"/logdirty/ret");
}
lds->cmd = enable ? "enable" : "disable";
@@ -1672,7 +1672,7 @@ static inline char *physmap_path(libxl__gc *gc, uint32_t
dm_domid,
uint32_t domid,
char *phys_offset, char *node)
{
- return libxl__device_model_xs_path(gc, dm_domid, domid,
+ return libxl__device_model_xs_path(gc, false, dm_domid, domid,
"/physmap/%s/%s",
phys_offset, node);
}
@@ -1694,7 +1694,7 @@ int libxl__toolstack_save(uint32_t domid, uint8_t **buf,
dm_domid = libxl_get_stubdom_id(CTX, domid);
entries = libxl__xs_directory(gc, 0,
- libxl__device_model_xs_path(gc, dm_domid, domid, "/physmap"),
+ libxl__device_model_xs_path(gc, false, dm_domid, domid,
"/physmap"),
&num);
count = num;
diff --git a/tools/libxl/libxl_internal.c b/tools/libxl/libxl_internal.c
index c2c67bd..f8a59d2 100644
--- a/tools/libxl/libxl_internal.c
+++ b/tools/libxl/libxl_internal.c
@@ -567,14 +567,25 @@ void libxl__update_domain_configuration(libxl__gc *gc,
dst->b_info.video_memkb = src->b_info.video_memkb;
}
-char *libxl__device_model_xs_path(libxl__gc *gc, uint32_t dm_domid,
+char *libxl__device_model_xs_path(libxl__gc *gc, bool pvqemu, uint32_t
dm_domid,
uint32_t domid, const char *format, ...)
{
char *s, *fmt;
va_list ap;
-
- fmt = GCSPRINTF("/local/domain/%u/device-model/%u%s", dm_domid,
- domid, format);
+ char *dm;
+ int xsrestrict = 0;
+
+ dm = libxl__xs_read(gc, XBT_NULL,
GCSPRINTF("/local/domain/%u/device-model", domid));
+ if (dm)
+ xsrestrict = libxl__check_qemu_supported(gc, dm, "xsrestrict");
+
+ if (!xsrestrict || !pvqemu) {
+ fmt = GCSPRINTF("/local/domain/%u/device-model/%u%s", dm_domid,
+ domid, format);
+ } else {
+ fmt = GCSPRINTF("/local/domain/%u/device-model/%u/pv%s", dm_domid,
+ domid, format);
+ }
va_start(ap, format);
s = libxl__vsprintf(gc, fmt, ap);
diff --git a/tools/libxl/libxl_internal.h b/tools/libxl/libxl_internal.h
index b11297b..c154827 100644
--- a/tools/libxl/libxl_internal.h
+++ b/tools/libxl/libxl_internal.h
@@ -1826,9 +1826,8 @@ _hidden libxl__json_object *libxl__json_parse(libxl__gc
*gc_opt, const char *s);
_hidden int libxl__device_model_version_running(libxl__gc *gc, uint32_t domid);
/* Return the system-wide default device model */
_hidden libxl_device_model_version libxl__default_device_model(libxl__gc *gc);
-_hidden char *libxl__device_model_xs_path(libxl__gc *gc, uint32_t dm_domid,
- uint32_t domid,
- const char *format, ...)
PRINTF_ATTRIBUTE(4, 5);
+_hidden char *libxl__device_model_xs_path(libxl__gc *gc, bool pvqemu, uint32_t
dm_domid,
+ uint32_t domid, const char *format, ...);
/* Check how executes hotplug script currently */
int libxl__hotplug_settings(libxl__gc *gc, xs_transaction_t t);
diff --git a/tools/libxl/libxl_pci.c b/tools/libxl/libxl_pci.c
index e0743f8..07f6209 100644
--- a/tools/libxl/libxl_pci.c
+++ b/tools/libxl/libxl_pci.c
@@ -853,9 +853,9 @@ static int qemu_pci_add_xenstore(libxl__gc *gc, uint32_t
domid,
uint32_t dm_domid;
dm_domid = libxl_get_stubdom_id(CTX, domid);
- path = libxl__device_model_xs_path(gc, dm_domid, domid, "/state");
+ path = libxl__device_model_xs_path(gc, false, dm_domid, domid, "/state");
state = libxl__xs_read(gc, XBT_NULL, path);
- path = libxl__device_model_xs_path(gc, dm_domid, domid, "/parameter");
+ path = libxl__device_model_xs_path(gc, false, dm_domid, domid,
"/parameter");
if (pcidev->vdevfn) {
libxl__xs_write(gc, XBT_NULL, path, PCI_BDF_VDEVFN","PCI_OPTIONS,
pcidev->domain, pcidev->bus, pcidev->dev,
@@ -870,9 +870,9 @@ static int qemu_pci_add_xenstore(libxl__gc *gc, uint32_t
domid,
libxl__qemu_traditional_cmd(gc, domid, "pci-ins");
rc = libxl__wait_for_device_model_deprecated(gc, domid, NULL, NULL,
pci_ins_check, state);
- path = libxl__device_model_xs_path(gc, dm_domid, domid, "/parameter");
+ path = libxl__device_model_xs_path(gc, false, dm_domid, domid,
"/parameter");
vdevfn = libxl__xs_read(gc, XBT_NULL, path);
- path = libxl__device_model_xs_path(gc, dm_domid, domid, "/state");
+ path = libxl__device_model_xs_path(gc, false, dm_domid, domid, "/state");
if ( rc < 0 )
LIBXL__LOG(ctx, LIBXL__LOG_ERROR,
"qemu refused to add device: %s", vdevfn);
@@ -1178,9 +1178,9 @@ static int qemu_pci_remove_xenstore(libxl__gc *gc,
uint32_t domid,
dm_domid = libxl_get_stubdom_id(CTX, domid);
- path = libxl__device_model_xs_path(gc, dm_domid, domid, "/state");
+ path = libxl__device_model_xs_path(gc, false, dm_domid, domid, "/state");
state = libxl__xs_read(gc, XBT_NULL, path);
- path = libxl__device_model_xs_path(gc, dm_domid, domid, "/parameter");
+ path = libxl__device_model_xs_path(gc, false, dm_domid, domid,
"/parameter");
libxl__xs_write(gc, XBT_NULL, path, PCI_BDF, pcidev->domain,
pcidev->bus, pcidev->dev, pcidev->func);
@@ -1198,7 +1198,7 @@ static int qemu_pci_remove_xenstore(libxl__gc *gc,
uint32_t domid,
return ERROR_FAIL;
}
}
- path = libxl__device_model_xs_path(gc, dm_domid, domid, "/state");
+ path = libxl__device_model_xs_path(gc, false, dm_domid, domid, "/state");
xs_write(ctx->xsh, XBT_NULL, path, state, strlen(state));
return 0;
--
1.7.10.4
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