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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v6 07/18] migration/save: pass checkpointed_stream from libxl to libxc
Pass checkpointed_stream from libxl to libxc.
It won't affact legacy migration because legacy migration
won't use this param.
Signed-off-by: Yang Hongyang <hongyang.yang@xxxxxxxxxxxx>
Signed-off-by: Wen Congyang <wency@xxxxxxxxxxxxxx>
CC: Ian Campbell <Ian.Campbell@xxxxxxxxxx>
CC: Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>
CC: Wei Liu <wei.liu2@xxxxxxxxxx>
CC: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
tools/libxc/include/xenguest.h | 6 ++++--
tools/libxc/xc_nomigrate.c | 3 ++-
tools/libxc/xc_sr_common.h | 12 +++++++++++-
tools/libxc/xc_sr_save.c | 14 ++++++++------
tools/libxl/libxl.c | 2 ++
tools/libxl/libxl_dom_save.c | 11 ++++++++---
tools/libxl/libxl_internal.h | 1 +
tools/libxl/libxl_save_callout.c | 2 +-
tools/libxl/libxl_save_helper.c | 3 ++-
tools/libxl/libxl_stream_write.c | 2 +-
tools/libxl/libxl_types.idl | 1 +
11 files changed, 41 insertions(+), 16 deletions(-)
diff --git a/tools/libxc/include/xenguest.h b/tools/libxc/include/xenguest.h
index 8f918b1..e8bc46d 100644
--- a/tools/libxc/include/xenguest.h
+++ b/tools/libxc/include/xenguest.h
@@ -29,7 +29,6 @@
#define XCFLAGS_HVM (1 << 2)
#define XCFLAGS_STDVGA (1 << 3)
#define XCFLAGS_CHECKPOINT_COMPRESS (1 << 4)
-#define XCFLAGS_CHECKPOINTED (1 << 5)
#define X86_64_B_SIZE 64
#define X86_32_B_SIZE 32
@@ -76,11 +75,14 @@ struct save_callbacks {
* @parm xch a handle to an open hypervisor interface
* @parm fd the file descriptor to save a domain to
* @parm dom the id of the domain
+ * @param checkpointed_stream MIG_STREAM_NONE if the far end of the stream
+ * doesn't use checkpointing
* @return 0 on success, -1 on failure
*/
int xc_domain_save(xc_interface *xch, int io_fd, uint32_t dom, uint32_t
max_iters,
uint32_t max_factor, uint32_t flags /* XCFLAGS_xxx */,
- struct save_callbacks* callbacks, int hvm);
+ struct save_callbacks* callbacks, int hvm,
+ int checkpointed_stream);
/* callbacks provided by xc_domain_restore */
struct restore_callbacks {
diff --git a/tools/libxc/xc_nomigrate.c b/tools/libxc/xc_nomigrate.c
index 902429e..c9124df 100644
--- a/tools/libxc/xc_nomigrate.c
+++ b/tools/libxc/xc_nomigrate.c
@@ -22,7 +22,8 @@
int xc_domain_save(xc_interface *xch, int io_fd, uint32_t dom, uint32_t
max_iters,
uint32_t max_factor, uint32_t flags,
- struct save_callbacks* callbacks, int hvm)
+ struct save_callbacks* callbacks, int hvm,
+ int checkpointed_stream)
{
errno = ENOSYS;
return -1;
diff --git a/tools/libxc/xc_sr_common.h b/tools/libxc/xc_sr_common.h
index 9aecde2..bc99e9a 100644
--- a/tools/libxc/xc_sr_common.h
+++ b/tools/libxc/xc_sr_common.h
@@ -171,6 +171,16 @@ struct xc_sr_context
xc_dominfo_t dominfo;
+ /*
+ * migration stream
+ * 0: Plain VM
+ * 1: Remus
+ */
+ enum {
+ MIG_STREAM_NONE, /* plain stream */
+ MIG_STREAM_REMUS,
+ } migration_stream;
+
union /* Common save or restore data. */
{
struct /* Save data. */
@@ -182,7 +192,7 @@ struct xc_sr_context
bool live;
/* Plain VM, or checkpoints over time. */
- bool checkpointed;
+ int checkpointed;
/* Further debugging information in the stream. */
bool debug;
diff --git a/tools/libxc/xc_sr_save.c b/tools/libxc/xc_sr_save.c
index 76ebb34..8ffd71d 100644
--- a/tools/libxc/xc_sr_save.c
+++ b/tools/libxc/xc_sr_save.c
@@ -628,7 +628,8 @@ static int send_domain_memory_live(struct xc_sr_context
*ctx)
if ( rc )
goto out;
- if ( ctx->save.debug && !ctx->save.checkpointed )
+ if ( ctx->save.debug &&
+ ctx->save.checkpointed != MIG_STREAM_NONE )
{
rc = verify_frames(ctx);
if ( rc )
@@ -753,7 +754,7 @@ static int save(struct xc_sr_context *ctx, uint16_t
guest_type)
if ( ctx->save.live )
rc = send_domain_memory_live(ctx);
- else if ( ctx->save.checkpointed )
+ else if ( ctx->save.checkpointed != MIG_STREAM_NONE )
rc = send_domain_memory_checkpointed(ctx);
else
rc = send_domain_memory_nonlive(ctx);
@@ -773,7 +774,7 @@ static int save(struct xc_sr_context *ctx, uint16_t
guest_type)
if ( rc )
goto err;
- if ( ctx->save.checkpointed )
+ if ( ctx->save.checkpointed != MIG_STREAM_NONE )
{
/*
* We have now completed the initial live portion of the checkpoint
@@ -792,7 +793,7 @@ static int save(struct xc_sr_context *ctx, uint16_t
guest_type)
if ( rc <= 0 )
goto err;
}
- } while ( ctx->save.checkpointed );
+ } while ( ctx->save.checkpointed != MIG_STREAM_NONE );
xc_report_progress_single(xch, "End of stream");
@@ -822,7 +823,8 @@ static int save(struct xc_sr_context *ctx, uint16_t
guest_type)
int xc_domain_save(xc_interface *xch, int io_fd, uint32_t dom,
uint32_t max_iters, uint32_t max_factor, uint32_t flags,
- struct save_callbacks* callbacks, int hvm)
+ struct save_callbacks* callbacks, int hvm,
+ int checkpointed_stream)
{
struct xc_sr_context ctx =
{
@@ -834,7 +836,7 @@ int xc_domain_save(xc_interface *xch, int io_fd, uint32_t
dom,
ctx.save.callbacks = callbacks;
ctx.save.live = !!(flags & XCFLAGS_LIVE);
ctx.save.debug = !!(flags & XCFLAGS_DEBUG);
- ctx.save.checkpointed = !!(flags & XCFLAGS_CHECKPOINTED);
+ ctx.save.checkpointed = checkpointed_stream;
/*
* TODO: Find some time to better tweak the live migration algorithm.
diff --git a/tools/libxl/libxl.c b/tools/libxl/libxl.c
index f8f7158..2faea4d 100644
--- a/tools/libxl/libxl.c
+++ b/tools/libxl/libxl.c
@@ -877,6 +877,7 @@ int libxl_domain_remus_start(libxl_ctx *ctx,
libxl_domain_remus_info *info,
dss->live = 1;
dss->debug = 0;
dss->remus = info;
+ dss->checkpointed_stream = LIBXL_CHECKPOINTED_STREAM_REMUS;
assert(info);
@@ -937,6 +938,7 @@ int libxl_domain_suspend(libxl_ctx *ctx, uint32_t domid,
int fd, int flags,
dss->type = type;
dss->live = flags & LIBXL_SUSPEND_LIVE;
dss->debug = flags & LIBXL_SUSPEND_DEBUG;
+ dss->checkpointed_stream = LIBXL_CHECKPOINTED_STREAM_NONE;
rc = libxl__fd_flags_modify_save(gc, dss->fd,
~(O_NONBLOCK|O_NDELAY), 0,
diff --git a/tools/libxl/libxl_dom_save.c b/tools/libxl/libxl_dom_save.c
index cc8cabe..dbdee8f 100644
--- a/tools/libxl/libxl_dom_save.c
+++ b/tools/libxl/libxl_dom_save.c
@@ -338,6 +338,12 @@ void libxl__domain_save(libxl__egc *egc,
libxl__domain_save_state *dss)
unsigned int nr_vnodes = 0, nr_vmemranges = 0, nr_vcpus = 0;
libxl__domain_suspend_state *dsps = &dss->dsps;
+ if (dss->checkpointed_stream != LIBXL_CHECKPOINTED_STREAM_NONE && !r_info)
{
+ LOG(ERROR, "Migration stream is checkpointed, but there's no "
+ "checkpoint info!");
+ goto out;
+ }
+
dss->rc = 0;
logdirty_init(&dss->logdirty);
dsps->ao = ao;
@@ -376,15 +382,14 @@ void libxl__domain_save(libxl__egc *egc,
libxl__domain_save_state *dss)
goto out;
}
- if (r_info != NULL) {
+ if (dss->checkpointed_stream == LIBXL_CHECKPOINTED_STREAM_REMUS) {
dss->interval = r_info->interval;
- dss->xcflags |= XCFLAGS_CHECKPOINTED;
if (libxl_defbool_val(r_info->compression))
dss->xcflags |= XCFLAGS_CHECKPOINT_COMPRESS;
}
memset(callbacks, 0, sizeof(*callbacks));
- if (r_info != NULL) {
+ if (dss->checkpointed_stream == LIBXL_CHECKPOINTED_STREAM_REMUS) {
callbacks->suspend = libxl__remus_domain_suspend_callback;
callbacks->postcopy = libxl__remus_domain_resume_callback;
callbacks->checkpoint = libxl__remus_domain_save_checkpoint_callback;
diff --git a/tools/libxl/libxl_internal.h b/tools/libxl/libxl_internal.h
index 93dd06c..cc7978d 100644
--- a/tools/libxl/libxl_internal.h
+++ b/tools/libxl/libxl_internal.h
@@ -3108,6 +3108,7 @@ struct libxl__domain_save_state {
libxl_domain_type type;
int live;
int debug;
+ int checkpointed_stream;
const libxl_domain_remus_info *remus;
/* private */
int rc;
diff --git a/tools/libxl/libxl_save_callout.c b/tools/libxl/libxl_save_callout.c
index 2d06b42..416b318 100644
--- a/tools/libxl/libxl_save_callout.c
+++ b/tools/libxl/libxl_save_callout.c
@@ -85,7 +85,7 @@ void libxl__xc_domain_save(libxl__egc *egc,
libxl__domain_save_state *dss,
const unsigned long argnums[] = {
dss->domid, 0, 0, dss->xcflags, dss->hvm,
- cbflags,
+ cbflags, dss->checkpointed_stream,
};
shs->ao = ao;
diff --git a/tools/libxl/libxl_save_helper.c b/tools/libxl/libxl_save_helper.c
index 39038f9..6bdcf13 100644
--- a/tools/libxl/libxl_save_helper.c
+++ b/tools/libxl/libxl_save_helper.c
@@ -253,6 +253,7 @@ int main(int argc, char **argv)
uint32_t flags = strtoul(NEXTARG,0,10);
int hvm = atoi(NEXTARG);
unsigned cbflags = strtoul(NEXTARG,0,10);
+ int checkpointed_stream = strtoul(NEXTARG,0,10);
assert(!*++argv);
helper_setcallbacks_save(&helper_save_callbacks, cbflags);
@@ -261,7 +262,7 @@ int main(int argc, char **argv)
setup_signals(save_signal_handler);
r = xc_domain_save(xch, io_fd, dom, max_iters, max_factor, flags,
- &helper_save_callbacks, hvm);
+ &helper_save_callbacks, hvm, checkpointed_stream);
complete(r);
} else if (!strcmp(mode,"--restore-domain")) {
diff --git a/tools/libxl/libxl_stream_write.c b/tools/libxl/libxl_stream_write.c
index c408ab1..852546f 100644
--- a/tools/libxl/libxl_stream_write.c
+++ b/tools/libxl/libxl_stream_write.c
@@ -355,7 +355,7 @@ void libxl__xc_domain_save_done(libxl__egc *egc, void
*dss_void,
* If the stream is not still alive, we must not continue any work.
*/
if (libxl__stream_write_inuse(stream)) {
- if (dss->remus)
+ if (dss->checkpointed_stream != LIBXL_CHECKPOINTED_STREAM_NONE)
stream_complete(egc, stream, 0);
else
write_emulator_xenstore_record(egc, stream);
diff --git a/tools/libxl/libxl_types.idl b/tools/libxl/libxl_types.idl
index 3ef11aa..9aa94be 100644
--- a/tools/libxl/libxl_types.idl
+++ b/tools/libxl/libxl_types.idl
@@ -228,6 +228,7 @@ libxl_hdtype = Enumeration("hdtype", [
(2, "AHCI"),
], init_val = "LIBXL_HDTYPE_IDE")
+# Consistent with the values defined for migration_stream
libxl_checkpointed_stream = Enumeration("checkpointed_stream", [
(0, "NONE"),
(1, "REMUS"),
--
2.5.0
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