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xen/libxc-sr-track-migration-time.patch

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From: Olaf Hering <olaf@aepfle.de>
Date: Thu, 4 Feb 2021 20:33:53 +0100
Subject: libxc sr track migration time
Track live migration state unconditionally in logfiles to see how long a domU was suspended.
Signed-off-by: Olaf Hering <olaf@aepfle.de>
---
tools/include/xentoollog.h | 1 +
tools/libs/ctrl/xc_domain.c | 12 +++++--
tools/libs/ctrl/xc_private.h | 9 +++++
tools/libs/guest/xg_resume.c | 5 ++-
tools/libs/guest/xg_sr_common.c | 59 ++++++++++++++++++++++++++++++++
tools/libs/guest/xg_sr_common.h | 3 ++
tools/libs/guest/xg_sr_restore.c | 3 ++
tools/libs/guest/xg_sr_save.c | 6 +++-
tools/xl/xl.c | 2 ++
9 files changed, 96 insertions(+), 4 deletions(-)
--- a/tools/include/xentoollog.h
+++ b/tools/include/xentoollog.h
@@ -133,6 +133,7 @@ const char *xtl_level_to_string(xentooll
});
+#define XL_NO_SUSEINFO "XL_NO_SUSEINFO"
#endif /* XENTOOLLOG_H */
/*
--- a/tools/libs/ctrl/xc_domain.c
+++ b/tools/libs/ctrl/xc_domain.c
@@ -66,20 +66,28 @@ int xc_domain_cacheflush(xc_interface *x
int xc_domain_pause(xc_interface *xch,
uint32_t domid)
{
+ int ret;
DECLARE_DOMCTL;
domctl.cmd = XEN_DOMCTL_pausedomain;
domctl.domain = domid;
- return do_domctl(xch, &domctl);
+ ret = do_domctl(xch, &domctl);
+ if (getenv(XL_NO_SUSEINFO) == NULL)
+ SUSEINFO("domid %u: %s returned %d", domid, __func__, ret);
+ return ret;
}
int xc_domain_unpause(xc_interface *xch,
uint32_t domid)
{
+ int ret;
DECLARE_DOMCTL;
domctl.cmd = XEN_DOMCTL_unpausedomain;
domctl.domain = domid;
- return do_domctl(xch, &domctl);
+ ret = do_domctl(xch, &domctl);
+ if (getenv(XL_NO_SUSEINFO) == NULL)
+ SUSEINFO("domid %u: %s returned %d", domid, __func__, ret);
+ return ret;
}
--- a/tools/libs/ctrl/xc_private.h
+++ b/tools/libs/ctrl/xc_private.h
@@ -42,6 +42,15 @@
#include <xen-tools/common-macros.h>
+/*
+ * Using loglevel ERROR to make sure the intended informational messages appear
+ * in libvirts libxl-driver.log
+ */
+#define SUSEINFO(_m, _a...) do { int ERROR_errno = errno; \
+ xc_report(xch, xch->error_handler, XTL_ERROR, XC_ERROR_NONE, "SUSEINFO: " _m , ## _a ); \
+ errno = ERROR_errno; \
+ } while (0)
+
#if defined(HAVE_VALGRIND_MEMCHECK_H) && !defined(NDEBUG) && !defined(__MINIOS__)
/* Compile in Valgrind client requests? */
#include <valgrind/memcheck.h>
--- a/tools/libs/guest/xg_resume.c
+++ b/tools/libs/guest/xg_resume.c
@@ -259,7 +259,10 @@ out:
*/
int xc_domain_resume(xc_interface *xch, uint32_t domid, int fast)
{
- return (fast
+ int ret = (fast
? xc_domain_resume_cooperative(xch, domid)
: xc_domain_resume_any(xch, domid));
+ if (getenv(XL_NO_SUSEINFO) == NULL)
+ SUSEINFO("domid %u: %s%s returned %d", domid, __func__, fast ? " fast" : "", ret);
+ return ret;
}
--- a/tools/libs/guest/xg_sr_common.c
+++ b/tools/libs/guest/xg_sr_common.c
@@ -163,6 +163,65 @@ static void __attribute__((unused)) buil
BUILD_BUG_ON(sizeof(struct xc_sr_rec_hvm_params) != 8);
}
+/* Write a two-character hex representation of 'byte' to digits[].
+ Pre-condition: sizeof(digits) >= 2 */
+static void byte_to_hex(char *digits, const uint8_t byte)
+{
+ uint8_t nybbel = byte >> 4;
+
+ if ( nybbel > 9 )
+ digits[0] = 'a' + nybbel-10;
+ else
+ digits[0] = '0' + nybbel;
+
+ nybbel = byte & 0x0f;
+ if ( nybbel > 9 )
+ digits[1] = 'a' + nybbel-10;
+ else
+ digits[1] = '0' + nybbel;
+}
+
+/* Convert an array of 16 unsigned bytes to a DCE/OSF formatted UUID
+ string.
+
+ Pre-condition: sizeof(dest) >= 37 */
+void sr_uuid_to_string(char *dest, const uint8_t *uuid)
+{
+ int i = 0;
+ char *p = dest;
+
+ for (; i < 4; i++ )
+ {
+ byte_to_hex(p, uuid[i]);
+ p += 2;
+ }
+ *p++ = '-';
+ for (; i < 6; i++ )
+ {
+ byte_to_hex(p, uuid[i]);
+ p += 2;
+ }
+ *p++ = '-';
+ for (; i < 8; i++ )
+ {
+ byte_to_hex(p, uuid[i]);
+ p += 2;
+ }
+ *p++ = '-';
+ for (; i < 10; i++ )
+ {
+ byte_to_hex(p, uuid[i]);
+ p += 2;
+ }
+ *p++ = '-';
+ for (; i < 16; i++ )
+ {
+ byte_to_hex(p, uuid[i]);
+ p += 2;
+ }
+ *p = '\0';
+}
+
/*
* Expand the tracking structures as needed.
* To avoid realloc()ing too excessively, the size increased to the nearest
--- a/tools/libs/guest/xg_sr_common.h
+++ b/tools/libs/guest/xg_sr_common.h
@@ -294,6 +294,7 @@ struct xc_sr_context
xc_stream_type_t stream_type;
xc_domaininfo_t dominfo;
+ char uuid[16*2+4+1];
union /* Common save or restore data. */
{
@@ -505,6 +506,8 @@ extern struct xc_sr_save_ops save_ops_x8
extern struct xc_sr_restore_ops restore_ops_x86_pv;
extern struct xc_sr_restore_ops restore_ops_x86_hvm;
+extern void sr_uuid_to_string(char *dest, const uint8_t *uuid);
+
struct xc_sr_record
{
uint32_t type;
--- a/tools/libs/guest/xg_sr_restore.c
+++ b/tools/libs/guest/xg_sr_restore.c
@@ -871,6 +871,8 @@ static int restore(struct xc_sr_context
struct xc_sr_rhdr rhdr;
int rc, saved_rc = 0, saved_errno = 0;
+ SUSEINFO("domid %u: %s %s start", ctx->domid, ctx->uuid, __func__);
+ DPRINTF("domid %u: max_pages %lx tot_pages %lx p2m_size %lx", ctx->domid, ctx->restore.max_pages, ctx->restore.tot_pages, ctx->restore.p2m_size);
IPRINTF("Restoring domain");
rc = setup(ctx);
@@ -946,6 +948,7 @@ static int restore(struct xc_sr_context
PERROR("Restore failed");
done:
+ SUSEINFO("domid %u: %s done", ctx->domid, __func__);
cleanup(ctx);
if ( saved_rc )
@@ -1011,6 +1014,7 @@ int xc_domain_restore(xc_interface *xch,
io_fd, dom, hvm, stream_type);
ctx.domid = dom;
+ sr_uuid_to_string(ctx.uuid, ctx.dominfo.handle);
if ( read_headers(&ctx) )
return -1;
--- a/tools/libs/guest/xg_sr_save.c
+++ b/tools/libs/guest/xg_sr_save.c
@@ -353,7 +353,7 @@ static void show_transfer_rate(struct xc
MiB_sec = (ctx->save.pages_sent * PAGE_SIZE * 1000U) / ms / (1024U*1024U);
errno = 0;
- IPRINTF("%s: %zu bytes + %zu pages in %ld.%09ld sec, %zu MiB/sec", __func__,
+ SUSEINFO("domid %u: %zu bytes + %zu pages in %ld.%09ld sec, %zu MiB/sec", ctx->domid,
ctx->save.overhead_sent, ctx->save.pages_sent,
diff.tv_sec, diff.tv_nsec, MiB_sec);
}
@@ -875,13 +875,16 @@ static int save(struct xc_sr_context *ct
{
xc_interface *xch = ctx->xch;
int rc, saved_rc = 0, saved_errno = 0;
+ unsigned long tot_pages = ctx->dominfo.tot_pages;
+ SUSEINFO("domid %u: %s %s start, %lu pages allocated", ctx->domid, ctx->uuid, __func__, tot_pages);
IPRINTF("Saving domain %d, type %s",
ctx->domid, dhdr_type_to_str(guest_type));
rc = setup(ctx);
if ( rc )
goto err;
+ SUSEINFO("domid %u: p2m_size %lx", ctx->domid, ctx->save.p2m_size);
xc_report_progress_single(xch, "Start of stream");
@@ -995,6 +998,7 @@ static int save(struct xc_sr_context *ct
PERROR("Save failed");
done:
+ SUSEINFO("domid %u: %s done", ctx->domid, __func__);
cleanup(ctx);
if ( saved_rc )
@@ -1054,6 +1058,7 @@ int xc_domain_save(xc_interface *xch, in
io_fd, dom, flags, hvm);
ctx.domid = dom;
+ sr_uuid_to_string(ctx.uuid, ctx.dominfo.handle);
if ( hvm )
{
--- a/tools/xl/xl.c
+++ b/tools/xl/xl.c
@@ -424,6 +424,8 @@ int main(int argc, char **argv)
logger = xtl_createlogger_stdiostream(stderr, minmsglevel, xtl_flags);
if (!logger) exit(EXIT_FAILURE);
+ /* Provide context to libxl and libxc: no SUSEINFO() from xl */
+ setenv(XL_NO_SUSEINFO, "1", 0);
xl_ctx_alloc();
atexit(xl_ctx_free);
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