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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v5 COLOPre 17/18] tools/libxl: move remus state into a seperate structure
From: Yang Hongyang <hongyang.yang@xxxxxxxxxxxx>
Add a new structure remus state, and move concrete layer's private
member to remus state.
it is pure refactoring and no functional changes.
Init interval in libxl__remus_setup(). It is safe to move this initialisation,
because this value is only used for remus, and remus will use this value after
libxl__remus_setup().
Signed-off-by: Wen Congyang <wency@xxxxxxxxxxxxxx>
Signed-off-by: Yang Hongyang <hongyang.yang@xxxxxxxxxxxx>
---
tools/libxl/libxl.c | 2 +-
tools/libxl/libxl_dom_save.c | 3 +--
tools/libxl/libxl_internal.h | 35 +++++++++++++++-----------
tools/libxl/libxl_netbuffer.c | 49 +++++++++++++++++++++----------------
tools/libxl/libxl_remus.c | 24 ++++++++++++------
tools/libxl/libxl_remus_disk_drbd.c | 8 +++---
6 files changed, 72 insertions(+), 49 deletions(-)
diff --git a/tools/libxl/libxl.c b/tools/libxl/libxl.c
index 69c8047..481824d 100644
--- a/tools/libxl/libxl.c
+++ b/tools/libxl/libxl.c
@@ -882,7 +882,7 @@ int libxl_domain_remus_start(libxl_ctx *ctx,
libxl_domain_remus_info *info,
assert(info);
/* Point of no return */
- libxl__remus_setup(egc, dss);
+ libxl__remus_setup(egc, &dss->rs);
return AO_INPROGRESS;
out:
diff --git a/tools/libxl/libxl_dom_save.c b/tools/libxl/libxl_dom_save.c
index 08a1cc9..3cb3217 100644
--- a/tools/libxl/libxl_dom_save.c
+++ b/tools/libxl/libxl_dom_save.c
@@ -392,7 +392,6 @@ void libxl__domain_save(libxl__egc *egc,
libxl__domain_save_state *dss)
}
if (dss->checkpointed_stream == LIBXL_CHECKPOINTED_STREAM_REMUS) {
- dss->interval = r_info->interval;
if (libxl_defbool_val(r_info->compression))
dss->xcflags |= XCFLAGS_CHECKPOINT_COMPRESS;
}
@@ -538,7 +537,7 @@ static void domain_save_done(libxl__egc *egc,
* from sending checkpoints. Teardown the network buffers and
* release netlink resources. This is an async op.
*/
- libxl__remus_teardown(egc, dss, rc);
+ libxl__remus_teardown(egc, &dss->rs, rc);
return;
}
diff --git a/tools/libxl/libxl_internal.h b/tools/libxl/libxl_internal.h
index 4f61482..059895d 100644
--- a/tools/libxl/libxl_internal.h
+++ b/tools/libxl/libxl_internal.h
@@ -2894,6 +2894,7 @@ struct libxl__checkpoint_devices_state {
libxl__ao *ao;
uint32_t domid;
libxl__checkpoint_callback *callback;
+ void *concrete_data;
int device_kind_flags;
/* The ops must be pointer array, and the last ops must be NULL */
const libxl__checkpoint_device_instance_ops **ops;
@@ -2917,16 +2918,6 @@ struct libxl__checkpoint_devices_state {
int num_disks;
libxl__multidev multidev;
-
- /*----- private for concrete (device-specific) layer only -----*/
-
- /* private for nic device subkind ops */
- char *netbufscript;
- struct nl_sock *nlsock;
- struct nl_cache *qdisc_cache;
-
- /* private for drbd disk subkind ops */
- char *drbd_probe_script;
};
/*
@@ -2974,6 +2965,23 @@ _hidden void
libxl__checkpoint_devices_preresume(libxl__egc *egc,
libxl__checkpoint_devices_state *cds);
_hidden void libxl__checkpoint_devices_commit(libxl__egc *egc,
libxl__checkpoint_devices_state *cds);
+
+/*----- Remus related state structure -----*/
+typedef struct libxl__remus_state libxl__remus_state;
+struct libxl__remus_state {
+ /* private */
+ libxl__ev_time checkpoint_timeout; /* used for Remus checkpoint */
+ int interval; /* checkpoint interval */
+
+ /*----- private for concrete (device-specific) layer only -----*/
+ /* private for nic device subkind ops */
+ char *netbufscript;
+ struct nl_sock *nlsock;
+ struct nl_cache *qdisc_cache;
+
+ /* private for drbd disk subkind ops */
+ char *drbd_probe_script;
+};
_hidden int libxl__netbuffer_enabled(libxl__gc *gc);
/*----- Legacy conversion helper -----*/
@@ -3132,9 +3140,8 @@ struct libxl__domain_save_state {
int hvm;
int xcflags;
libxl__domain_suspend_state dsps;
+ libxl__remus_state rs;
libxl__checkpoint_devices_state cds;
- libxl__ev_time checkpoint_timeout; /* used for Remus checkpoint */
- int interval; /* checkpoint interval (for Remus) */
libxl__stream_write_state sws;
libxl__logdirty_switch logdirty;
/* private for libxl__domain_save_device_model */
@@ -3554,9 +3561,9 @@ _hidden void libxl__remus_domain_resume_callback(void
*data);
_hidden void libxl__remus_domain_save_checkpoint_callback(void *data);
/* Remus setup and teardown*/
_hidden void libxl__remus_setup(libxl__egc *egc,
- libxl__domain_save_state *dss);
+ libxl__remus_state *rs);
_hidden void libxl__remus_teardown(libxl__egc *egc,
- libxl__domain_save_state *dss,
+ libxl__remus_state *rs,
int rc);
/* Remus callbacks for restore */
_hidden void libxl__remus_domain_restore_checkpoint_callback(void *data);
diff --git a/tools/libxl/libxl_netbuffer.c b/tools/libxl/libxl_netbuffer.c
index 33c2a42..5c7e8a2 100644
--- a/tools/libxl/libxl_netbuffer.c
+++ b/tools/libxl/libxl_netbuffer.c
@@ -42,17 +42,18 @@ int init_subkind_nic(libxl__checkpoint_devices_state *cds)
{
int rc, ret;
libxl__domain_save_state *dss = CONTAINER_OF(cds, *dss, cds);
+ libxl__remus_state *rs = cds->concrete_data;
STATE_AO_GC(cds->ao);
- cds->nlsock = nl_socket_alloc();
- if (!cds->nlsock) {
+ rs->nlsock = nl_socket_alloc();
+ if (!rs->nlsock) {
LOG(ERROR, "cannot allocate nl socket");
rc = ERROR_FAIL;
goto out;
}
- ret = nl_connect(cds->nlsock, NETLINK_ROUTE);
+ ret = nl_connect(rs->nlsock, NETLINK_ROUTE);
if (ret) {
LOG(ERROR, "failed to open netlink socket: %s",
nl_geterror(ret));
@@ -61,7 +62,7 @@ int init_subkind_nic(libxl__checkpoint_devices_state *cds)
}
/* get list of all qdiscs installed on network devs. */
- ret = rtnl_qdisc_alloc_cache(cds->nlsock, &cds->qdisc_cache);
+ ret = rtnl_qdisc_alloc_cache(rs->nlsock, &rs->qdisc_cache);
if (ret) {
LOG(ERROR, "failed to allocate qdisc cache: %s",
nl_geterror(ret));
@@ -70,10 +71,10 @@ int init_subkind_nic(libxl__checkpoint_devices_state *cds)
}
if (dss->remus->netbufscript) {
- cds->netbufscript = libxl__strdup(gc, dss->remus->netbufscript);
+ rs->netbufscript = libxl__strdup(gc, dss->remus->netbufscript);
} else {
- cds->netbufscript = GCSPRINTF("%s/remus-netbuf-setup",
- libxl__xen_script_dir_path());
+ rs->netbufscript = GCSPRINTF("%s/remus-netbuf-setup",
+ libxl__xen_script_dir_path());
}
rc = 0;
@@ -84,20 +85,22 @@ out:
void cleanup_subkind_nic(libxl__checkpoint_devices_state *cds)
{
+ libxl__remus_state *rs = cds->concrete_data;
+
STATE_AO_GC(cds->ao);
/* free qdisc cache */
- if (cds->qdisc_cache) {
- nl_cache_clear(cds->qdisc_cache);
- nl_cache_free(cds->qdisc_cache);
- cds->qdisc_cache = NULL;
+ if (rs->qdisc_cache) {
+ nl_cache_clear(rs->qdisc_cache);
+ nl_cache_free(rs->qdisc_cache);
+ rs->qdisc_cache = NULL;
}
/* close & free nlsock */
- if (cds->nlsock) {
- nl_close(cds->nlsock);
- nl_socket_free(cds->nlsock);
- cds->nlsock = NULL;
+ if (rs->nlsock) {
+ nl_close(rs->nlsock);
+ nl_socket_free(rs->nlsock);
+ rs->nlsock = NULL;
}
}
@@ -150,13 +153,14 @@ static int init_qdisc(libxl__checkpoint_devices_state
*cds,
int rc, ret, ifindex;
struct rtnl_link *ifb = NULL;
struct rtnl_qdisc *qdisc = NULL;
+ libxl__remus_state *rs = cds->concrete_data;
STATE_AO_GC(cds->ao);
/* Now that we have brought up REMUS_IFB device with plug qdisc for
* this vif, so we need to refill the qdisc cache.
*/
- ret = nl_cache_refill(cds->nlsock, cds->qdisc_cache);
+ ret = nl_cache_refill(rs->nlsock, rs->qdisc_cache);
if (ret) {
LOG(ERROR, "cannot refill qdisc cache: %s", nl_geterror(ret));
rc = ERROR_FAIL;
@@ -164,7 +168,7 @@ static int init_qdisc(libxl__checkpoint_devices_state *cds,
}
/* get a handle to the REMUS_IFB interface */
- ret = rtnl_link_get_kernel(cds->nlsock, 0, remus_nic->ifb, &ifb);
+ ret = rtnl_link_get_kernel(rs->nlsock, 0, remus_nic->ifb, &ifb);
if (ret) {
LOG(ERROR, "cannot obtain handle for %s: %s", remus_nic->ifb,
nl_geterror(ret));
@@ -187,7 +191,7 @@ static int init_qdisc(libxl__checkpoint_devices_state *cds,
* There is no need to explicitly free this qdisc as its just a
* reference from the qdisc cache we allocated earlier.
*/
- qdisc = rtnl_qdisc_get_by_parent(cds->qdisc_cache, ifindex, TC_H_ROOT);
+ qdisc = rtnl_qdisc_get_by_parent(rs->qdisc_cache, ifindex, TC_H_ROOT);
if (qdisc) {
const char *tc_kind = rtnl_tc_get_kind(TC_CAST(qdisc));
/* Sanity check: Ensure that the root qdisc is a plug qdisc. */
@@ -238,11 +242,12 @@ static void setup_async_exec(libxl__checkpoint_device
*dev, char *op)
libxl__remus_device_nic *remus_nic = dev->concrete_data;
libxl__checkpoint_devices_state *cds = dev->cds;
libxl__async_exec_state *aes = &dev->aodev.aes;
+ libxl__remus_state *rs = cds->concrete_data;
STATE_AO_GC(cds->ao);
/* Convenience aliases */
- char *const script = libxl__strdup(gc, cds->netbufscript);
+ char *const script = libxl__strdup(gc, rs->netbufscript);
const uint32_t domid = cds->domid;
const int dev_id = remus_nic->devid;
const char *const vif = remus_nic->vif;
@@ -333,6 +338,7 @@ static void netbuf_setup_script_cb(libxl__egc *egc,
libxl__checkpoint_device *dev = CONTAINER_OF(aodev, *dev, aodev);
libxl__remus_device_nic *remus_nic = dev->concrete_data;
libxl__checkpoint_devices_state *cds = dev->cds;
+ libxl__remus_state *rs = cds->concrete_data;
const char *out_path_base, *hotplug_error = NULL;
STATE_AO_GC(cds->ao);
@@ -377,7 +383,7 @@ static void netbuf_setup_script_cb(libxl__egc *egc,
if (hotplug_error) {
LOG(ERROR, "netbuf script %s setup failed for vif %s: %s",
- cds->netbufscript, vif, hotplug_error);
+ rs->netbufscript, vif, hotplug_error);
rc = ERROR_FAIL;
goto out;
}
@@ -445,6 +451,7 @@ static int remus_netbuf_op(libxl__remus_device_nic
*remus_nic,
int buffer_op)
{
int rc, ret;
+ libxl__remus_state *rs = cds->concrete_data;
STATE_AO_GC(cds->ao);
@@ -458,7 +465,7 @@ static int remus_netbuf_op(libxl__remus_device_nic
*remus_nic,
goto out;
}
- ret = rtnl_qdisc_add(cds->nlsock, remus_nic->qdisc, NLM_F_REQUEST);
+ ret = rtnl_qdisc_add(rs->nlsock, remus_nic->qdisc, NLM_F_REQUEST);
if (ret) {
rc = ERROR_FAIL;
goto out;
diff --git a/tools/libxl/libxl_remus.c b/tools/libxl/libxl_remus.c
index 3375331..00e3c80 100644
--- a/tools/libxl/libxl_remus.c
+++ b/tools/libxl/libxl_remus.c
@@ -35,9 +35,10 @@ static void remus_setup_failed(libxl__egc *egc,
static void remus_checkpoint_stream_written(
libxl__egc *egc, libxl__stream_write_state *sws, int rc);
-void libxl__remus_setup(libxl__egc *egc,
- libxl__domain_save_state *dss)
+void libxl__remus_setup(libxl__egc *egc, libxl__remus_state *rs)
{
+ libxl__domain_save_state *dss = CONTAINER_OF(rs, *dss, rs);
+
/* Convenience aliases */
libxl__checkpoint_devices_state *const cds = &dss->cds;
const libxl_domain_remus_info *const info = dss->remus;
@@ -59,6 +60,8 @@ void libxl__remus_setup(libxl__egc *egc,
cds->domid = dss->domid;
cds->callback = remus_setup_done;
cds->ops = remus_ops;
+ cds->concrete_data = rs;
+ rs->interval = info->interval;
dss->sws.checkpoint_callback = remus_checkpoint_stream_written;
@@ -103,15 +106,20 @@ static void remus_teardown_done(libxl__egc *egc,
libxl__checkpoint_devices_state *cds,
int rc);
void libxl__remus_teardown(libxl__egc *egc,
- libxl__domain_save_state *dss,
+ libxl__remus_state *rs,
int rc)
{
+ libxl__domain_save_state *dss = CONTAINER_OF(rs, *dss, rs);
+
+ /* Convenience aliases */
+ libxl__checkpoint_devices_state *const cds = &dss->cds;
+
EGC_GC;
LOG(WARN, "Remus: Domain suspend terminated with rc %d,"
" teardown Remus devices...", rc);
- dss->cds.callback = remus_teardown_done;
- libxl__checkpoint_devices_teardown(egc, &dss->cds);
+ cds->callback = remus_teardown_done;
+ libxl__checkpoint_devices_teardown(egc, cds);
}
static void remus_teardown_done(libxl__egc *egc,
@@ -285,9 +293,9 @@ static void remus_devices_commit_cb(libxl__egc *egc,
*/
/* Set checkpoint interval timeout */
- rc = libxl__ev_time_register_rel(ao, &dss->checkpoint_timeout,
+ rc = libxl__ev_time_register_rel(ao, &dss->rs.checkpoint_timeout,
remus_next_checkpoint,
- dss->interval);
+ dss->rs.interval);
if (rc)
goto out;
@@ -303,7 +311,7 @@ static void remus_next_checkpoint(libxl__egc *egc,
libxl__ev_time *ev,
int rc)
{
libxl__domain_save_state *dss =
- CONTAINER_OF(ev, *dss, checkpoint_timeout);
+ CONTAINER_OF(ev, *dss, rs.checkpoint_timeout);
STATE_AO_GC(dss->ao);
diff --git a/tools/libxl/libxl_remus_disk_drbd.c
b/tools/libxl/libxl_remus_disk_drbd.c
index 4dddc58..844dd66 100644
--- a/tools/libxl/libxl_remus_disk_drbd.c
+++ b/tools/libxl/libxl_remus_disk_drbd.c
@@ -28,10 +28,11 @@ typedef struct libxl__remus_drbd_disk {
int init_subkind_drbd_disk(libxl__checkpoint_devices_state *cds)
{
+ libxl__remus_state *rs = cds->concrete_data;
STATE_AO_GC(cds->ao);
- cds->drbd_probe_script = GCSPRINTF("%s/block-drbd-probe",
- libxl__xen_script_dir_path());
+ rs->drbd_probe_script = GCSPRINTF("%s/block-drbd-probe",
+ libxl__xen_script_dir_path());
return 0;
}
@@ -96,6 +97,7 @@ static void match_async_exec(libxl__egc *egc,
libxl__checkpoint_device *dev)
int arraysize, nr = 0, rc;
const libxl_device_disk *disk = dev->backend_dev;
libxl__async_exec_state *aes = &dev->aodev.aes;
+ libxl__remus_state *rs = dev->cds->concrete_data;
STATE_AO_GC(dev->cds->ao);
/* setup env & args */
@@ -107,7 +109,7 @@ static void match_async_exec(libxl__egc *egc,
libxl__checkpoint_device *dev)
arraysize = 3;
nr = 0;
GCNEW_ARRAY(aes->args, arraysize);
- aes->args[nr++] = dev->cds->drbd_probe_script;
+ aes->args[nr++] = rs->drbd_probe_script;
aes->args[nr++] = disk->pdev_path;
aes->args[nr++] = NULL;
assert(nr <= arraysize);
--
2.5.0
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