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Add asynchronous support in nbdkit-vddk-plugin 

resolves: rhbz#2018463, rhbz#2011709
This commit is contained in:
Richard W.M. Jones 2021-10-29 14:09:21 +01:00
parent 4129f7480f
commit 0d3bf32327
19 changed files with 3174 additions and 5 deletions
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117
0001-vddk-Refactor-how-D-vddk.stats-1-is-collected.patch Normal file
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@ -0,0 +1,117 @@
From 7ab943bbb0ac0dd0094d6771d4cb04374d569eb3 Mon Sep 17 00:00:00 2001
From: "Richard W.M. Jones" <rjones@redhat.com>
Date: Thu, 21 Oct 2021 14:49:52 +0100
Subject: [PATCH] vddk: Refactor how -D vddk.stats=1 is collected
In order to allow us to collect more per-API stats, introduce a global
struct per API for storing these stats.
(cherry picked from commit 3d8657f3d9a2c1b59284333566428b4c7ce32a74)
---
plugins/vddk/vddk.c | 36 ++++++++++++++++++------------------
1 file changed, 18 insertions(+), 18 deletions(-)
diff --git a/plugins/vddk/vddk.c b/plugins/vddk/vddk.c
index c6e023eb..fc872883 100644
--- a/plugins/vddk/vddk.c
+++ b/plugins/vddk/vddk.c
@@ -1,5 +1,5 @@
/* nbdkit
- * Copyright (C) 2013-2020 Red Hat Inc.
+ * Copyright (C) 2013-2021 Red Hat Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
@@ -103,14 +103,23 @@ static bool is_remote;
/* For each VDDK API define a variable to store the time taken (used
* to implement -D vddk.stats=1).
*/
+struct vddk_stat {
+ const char *name; /* function name */
+ int64_t usecs; /* total number of usecs consumed */
+};
static pthread_mutex_t stats_lock = PTHREAD_MUTEX_INITIALIZER;
static void display_stats (void);
-#define STUB(fn,ret,args) static int64_t stats_##fn;
-#define OPTIONAL_STUB(fn,ret,args) static int64_t stats_##fn;
+#define STUB(fn,ret,args) \
+ static struct vddk_stat stats_##fn = { .name = #fn }
+#define OPTIONAL_STUB(fn,ret,args) \
+ static struct vddk_stat stats_##fn = { .name = #fn }
#include "vddk-stubs.h"
#undef STUB
#undef OPTIONAL_STUB
+/* Macros to bracket each VDDK API call, for printing debugging
+ * information and collecting statistics.
+ */
#define VDDK_CALL_START(fn, fs, ...) \
do { \
struct timeval start_t, end_t; \
@@ -131,10 +140,11 @@ static void display_stats (void);
if (vddk_debug_stats) { \
gettimeofday (&end_t, NULL); \
ACQUIRE_LOCK_FOR_CURRENT_SCOPE (&stats_lock); \
- stats_##fn += tvdiff_usec (&start_t, &end_t); \
+ stats_##fn.usecs += tvdiff_usec (&start_t, &end_t); \
} \
} while (0)
+/* Print VDDK errors. */
#define VDDK_ERROR(err, fs, ...) \
do { \
char *vddk_err_msg; \
@@ -167,10 +177,6 @@ vddk_unload (void)
free (password);
}
-struct vddk_stat {
- const char *fn;
- int64_t usecs;
-};
DEFINE_VECTOR_TYPE(statlist, struct vddk_stat)
static int
@@ -179,7 +185,7 @@ stat_compare (const void *vp1, const void *vp2)
const struct vddk_stat *st1 = vp1;
const struct vddk_stat *st2 = vp2;
- /* Note: sorts in reverse order. */
+ /* Note: sorts in reverse order of time spent in each API call. */
if (st1->usecs < st2->usecs) return 1;
else if (st1->usecs > st2->usecs) return -1;
else return 0;
@@ -189,19 +195,13 @@ static void
display_stats (void)
{
statlist stats = empty_vector;
- struct vddk_stat st;
size_t i;
-#define ADD_ONE_STAT(fn_, usecs_) \
- st.fn = fn_; \
- st.usecs = usecs_; \
- statlist_append (&stats, st)
-#define STUB(fn,ret,args) ADD_ONE_STAT (#fn, stats_##fn);
-#define OPTIONAL_STUB(fn,ret,args) ADD_ONE_STAT (#fn, stats_##fn);
+#define STUB(fn,ret,args) statlist_append (&stats, stats_##fn)
+#define OPTIONAL_STUB(fn,ret,args) statlist_append (&stats, stats_##fn)
#include "vddk-stubs.h"
#undef STUB
#undef OPTIONAL_STUB
-#undef ADD_ONE_STAT
qsort (stats.ptr, stats.size, sizeof stats.ptr[0], stat_compare);
@@ -209,7 +209,7 @@ display_stats (void)
nbdkit_debug ("%-40s %9s", "", "µs");
for (i = 0; i < stats.size; ++i) {
if (stats.ptr[i].usecs)
- nbdkit_debug ("%-40s %9" PRIi64, stats.ptr[i].fn, stats.ptr[i].usecs);
+ nbdkit_debug ("%-40s %9" PRIi64, stats.ptr[i].name, stats.ptr[i].usecs);
}
statlist_reset (&stats);
}
--
2.31.1

140
0002-vddk-Extend-D-vddk.stats-1-to-show-number-of-calls-a.patch Normal file
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@ -0,0 +1,140 @@
From 7139553f4008c0d4dfdce1dae4c933713af60548 Mon Sep 17 00:00:00 2001
From: "Richard W.M. Jones" <rjones@redhat.com>
Date: Thu, 21 Oct 2021 15:10:00 +0100
Subject: [PATCH] vddk: Extend -D vddk.stats=1 to show number of calls and
bytes transferred
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit
The new output looks like this:
nbdkit: debug: VDDK function stats (-D vddk.stats=1):
nbdkit: debug: VixDiskLib_... µs calls bytes
nbdkit: debug: Exit 1000854 1
nbdkit: debug: InitEx 79304 1
nbdkit: debug: Flush 13577 1
nbdkit: debug: Write 12534 21 10485760
nbdkit: debug: Open 4753 3
nbdkit: debug: Read 966 20 5242880
nbdkit: debug: Close 574 3
nbdkit: debug: QueryAllocatedBlocks 116 4
nbdkit: debug: ConnectEx 103 3
nbdkit: debug: Disconnect 88 3
nbdkit: debug: GetTransportMode 68 3
nbdkit: debug: GetInfo 46 3
nbdkit: debug: FreeConnectParams 36 3
nbdkit: debug: FreeInfo 36 3
nbdkit: debug: FreeBlockList 22 4
nbdkit: debug: AllocateConnectParams 22 3
(cherry picked from commit 5c80f0d290db45a679d55baf37ff39bacb8ce7ec)
---
plugins/vddk/nbdkit-vddk-plugin.pod | 3 +--
plugins/vddk/vddk.c | 41 +++++++++++++++++++++++++----
2 files changed, 37 insertions(+), 7 deletions(-)
diff --git a/plugins/vddk/nbdkit-vddk-plugin.pod b/plugins/vddk/nbdkit-vddk-plugin.pod
index 2363b8fa..88df0ddb 100644
--- a/plugins/vddk/nbdkit-vddk-plugin.pod
+++ b/plugins/vddk/nbdkit-vddk-plugin.pod
@@ -517,8 +517,7 @@ Suppress debugging of datapath calls (C<Read> and C<Write>).
=item B<-D vddk.stats=1>
-When the plugin exits print some statistics about the amount of time
-spent waiting on each VDDK call.
+When the plugin exits print some statistics about each VDDK call.
=back
diff --git a/plugins/vddk/vddk.c b/plugins/vddk/vddk.c
index fc872883..b623c25c 100644
--- a/plugins/vddk/vddk.c
+++ b/plugins/vddk/vddk.c
@@ -106,6 +106,8 @@ static bool is_remote;
struct vddk_stat {
const char *name; /* function name */
int64_t usecs; /* total number of usecs consumed */
+ uint64_t calls; /* number of times called */
+ uint64_t bytes; /* bytes transferred, datapath calls only */
};
static pthread_mutex_t stats_lock = PTHREAD_MUTEX_INITIALIZER;
static void display_stats (void);
@@ -141,6 +143,17 @@ static void display_stats (void);
gettimeofday (&end_t, NULL); \
ACQUIRE_LOCK_FOR_CURRENT_SCOPE (&stats_lock); \
stats_##fn.usecs += tvdiff_usec (&start_t, &end_t); \
+ stats_##fn.calls++; \
+ } \
+ } while (0)
+#define VDDK_CALL_END_DATAPATH(fn, bytes_) \
+ while (0); \
+ if (vddk_debug_stats) { \
+ gettimeofday (&end_t, NULL); \
+ ACQUIRE_LOCK_FOR_CURRENT_SCOPE (&stats_lock); \
+ stats_##fn.usecs += tvdiff_usec (&start_t, &end_t); \
+ stats_##fn.calls++; \
+ stats_##fn.bytes += bytes_; \
} \
} while (0)
@@ -191,6 +204,12 @@ stat_compare (const void *vp1, const void *vp2)
else return 0;
}
+static const char *
+api_name_without_prefix (const char *name)
+{
+ return strncmp (name, "VixDiskLib_", 11) == 0 ? name + 11 : name;
+}
+
static void
display_stats (void)
{
@@ -206,10 +225,22 @@ display_stats (void)
qsort (stats.ptr, stats.size, sizeof stats.ptr[0], stat_compare);
nbdkit_debug ("VDDK function stats (-D vddk.stats=1):");
- nbdkit_debug ("%-40s %9s", "", "µs");
+ nbdkit_debug ("%-24s %15s %5s %15s",
+ "VixDiskLib_...", "µs", "calls", "bytes");
for (i = 0; i < stats.size; ++i) {
- if (stats.ptr[i].usecs)
- nbdkit_debug ("%-40s %9" PRIi64, stats.ptr[i].name, stats.ptr[i].usecs);
+ if (stats.ptr[i].usecs) {
+ if (stats.ptr[i].bytes > 0)
+ nbdkit_debug (" %-22s %15" PRIi64 " %5" PRIu64 " %15" PRIu64,
+ api_name_without_prefix (stats.ptr[i].name),
+ stats.ptr[i].usecs,
+ stats.ptr[i].calls,
+ stats.ptr[i].bytes);
+ else
+ nbdkit_debug (" %-22s %15" PRIi64 " %5" PRIu64,
+ api_name_without_prefix (stats.ptr[i].name),
+ stats.ptr[i].usecs,
+ stats.ptr[i].calls);
+ }
}
statlist_reset (&stats);
}
@@ -832,7 +863,7 @@ vddk_pread (void *handle, void *buf, uint32_t count, uint64_t offset,
"%" PRIu32 " sectors, buffer",
offset, count) {
err = VixDiskLib_Read (h->handle, offset, count, buf);
- } VDDK_CALL_END (VixDiskLib_Read);
+ } VDDK_CALL_END_DATAPATH (VixDiskLib_Read, count * VIXDISKLIB_SECTOR_SIZE);
if (err != VIX_OK) {
VDDK_ERROR (err, "VixDiskLib_Read");
return -1;
@@ -872,7 +903,7 @@ vddk_pwrite (void *handle, const void *buf, uint32_t count, uint64_t offset,
"%" PRIu32 " sectors, buffer",
offset, count) {
err = VixDiskLib_Write (h->handle, offset, count, buf);
- } VDDK_CALL_END (VixDiskLib_Write);
+ } VDDK_CALL_END_DATAPATH (VixDiskLib_Write, count * VIXDISKLIB_SECTOR_SIZE);
if (err != VIX_OK) {
VDDK_ERROR (err, "VixDiskLib_Write");
return -1;
--
2.31.1

320
0003-vddk-Simplify-and-consolidate-VDDK_CALL_START-END-ma.patch Normal file
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@ -0,0 +1,320 @@
From 8bd83802eb36508c2ca647da9ba8fb8a5dce7a2b Mon Sep 17 00:00:00 2001
From: "Richard W.M. Jones" <rjones@redhat.com>
Date: Thu, 21 Oct 2021 22:55:17 +0100
Subject: [PATCH] vddk: Simplify and consolidate VDDK_CALL_START/END macros
We don't need the VDDK_CALL_*_DATAPATH versions of these macros
because the compiler is able to optimize some static strcmps.
Furthermore we can remove extra { .. } when the macros are applied.
(cherry picked from commit 3ea0ed6582faa8f800b7a2a15d58032917a21bd5)
---
plugins/vddk/vddk.c | 124 ++++++++++++++++++++------------------------
1 file changed, 56 insertions(+), 68 deletions(-)
diff --git a/plugins/vddk/vddk.c b/plugins/vddk/vddk.c
index b623c25c..85b0c722 100644
--- a/plugins/vddk/vddk.c
+++ b/plugins/vddk/vddk.c
@@ -125,28 +125,16 @@ static void display_stats (void);
#define VDDK_CALL_START(fn, fs, ...) \
do { \
struct timeval start_t, end_t; \
+ /* GCC can optimize this away at compile time: */ \
+ const bool datapath = \
+ strcmp (#fn, "VixDiskLib_Read") == 0 || \
+ strcmp (#fn, "VixDiskLib_Write") == 0; \
if (vddk_debug_stats) \
gettimeofday (&start_t, NULL); \
- nbdkit_debug ("VDDK call: %s (" fs ")", #fn, ##__VA_ARGS__); \
- do
-#define VDDK_CALL_START_DATAPATH(fn, fs, ...) \
- do { \
- struct timeval start_t, end_t; \
- if (vddk_debug_stats) \
- gettimeofday (&start_t, NULL); \
- if (vddk_debug_datapath) \
+ if (!datapath || vddk_debug_datapath) \
nbdkit_debug ("VDDK call: %s (" fs ")", #fn, ##__VA_ARGS__); \
do
-#define VDDK_CALL_END(fn) \
- while (0); \
- if (vddk_debug_stats) { \
- gettimeofday (&end_t, NULL); \
- ACQUIRE_LOCK_FOR_CURRENT_SCOPE (&stats_lock); \
- stats_##fn.usecs += tvdiff_usec (&start_t, &end_t); \
- stats_##fn.calls++; \
- } \
- } while (0)
-#define VDDK_CALL_END_DATAPATH(fn, bytes_) \
+#define VDDK_CALL_END(fn, bytes_) \
while (0); \
if (vddk_debug_stats) { \
gettimeofday (&end_t, NULL); \
@@ -161,13 +149,13 @@ static void display_stats (void);
#define VDDK_ERROR(err, fs, ...) \
do { \
char *vddk_err_msg; \
- VDDK_CALL_START (VixDiskLib_GetErrorText, "%lu", err) { \
+ VDDK_CALL_START (VixDiskLib_GetErrorText, "%lu", err) \
vddk_err_msg = VixDiskLib_GetErrorText ((err), NULL); \
- } VDDK_CALL_END (VixDiskLib_GetErrorText); \
+ VDDK_CALL_END (VixDiskLib_GetErrorText, 0); \
nbdkit_error (fs ": %s", ##__VA_ARGS__, vddk_err_msg); \
- VDDK_CALL_START (VixDiskLib_FreeErrorText, "") { \
+ VDDK_CALL_START (VixDiskLib_FreeErrorText, "") \
VixDiskLib_FreeErrorText (vddk_err_msg); \
- } VDDK_CALL_END (VixDiskLib_FreeErrorText); \
+ VDDK_CALL_END (VixDiskLib_FreeErrorText, 0); \
} while (0)
/* Unload the plugin. */
@@ -175,9 +163,9 @@ static void
vddk_unload (void)
{
if (init_called) {
- VDDK_CALL_START (VixDiskLib_Exit, "") {
+ VDDK_CALL_START (VixDiskLib_Exit, "")
VixDiskLib_Exit ();
- } VDDK_CALL_END (VixDiskLib_Exit);
+ VDDK_CALL_END (VixDiskLib_Exit, 0);
}
if (dl)
dlclose (dl);
@@ -572,13 +560,13 @@ vddk_after_fork (void)
VDDK_CALL_START (VixDiskLib_InitEx,
"%d, %d, &debug_fn, &error_fn, &error_fn, %s, %s",
VDDK_MAJOR, VDDK_MINOR,
- libdir, config ? : "NULL") {
+ libdir, config ? : "NULL")
err = VixDiskLib_InitEx (VDDK_MAJOR, VDDK_MINOR,
&debug_function, /* log function */
&error_function, /* warn function */
&error_function, /* panic function */
libdir, config);
- } VDDK_CALL_END (VixDiskLib_InitEx);
+ VDDK_CALL_END (VixDiskLib_InitEx, 0);
if (err != VIX_OK) {
VDDK_ERROR (err, "VixDiskLib_InitEx");
exit (EXIT_FAILURE);
@@ -640,9 +628,9 @@ allocate_connect_params (void)
VixDiskLibConnectParams *ret;
if (VixDiskLib_AllocateConnectParams != NULL) {
- VDDK_CALL_START (VixDiskLib_AllocateConnectParams, "") {
+ VDDK_CALL_START (VixDiskLib_AllocateConnectParams, "")
ret = VixDiskLib_AllocateConnectParams ();
- } VDDK_CALL_END (VixDiskLib_AllocateConnectParams);
+ VDDK_CALL_END (VixDiskLib_AllocateConnectParams, 0);
}
else
ret = calloc (1, sizeof (VixDiskLibConnectParams));
@@ -657,9 +645,9 @@ free_connect_params (VixDiskLibConnectParams *params)
* originally called. Otherwise use free.
*/
if (VixDiskLib_AllocateConnectParams != NULL) {
- VDDK_CALL_START (VixDiskLib_FreeConnectParams, "params") {
+ VDDK_CALL_START (VixDiskLib_FreeConnectParams, "params")
VixDiskLib_FreeConnectParams (params);
- } VDDK_CALL_END (VixDiskLib_FreeConnectParams);
+ VDDK_CALL_END (VixDiskLib_FreeConnectParams, 0);
}
else
free (params);
@@ -717,13 +705,13 @@ vddk_open (int readonly)
"h->params, %d, %s, %s, &connection",
readonly,
snapshot_moref ? : "NULL",
- transport_modes ? : "NULL") {
+ transport_modes ? : "NULL")
err = VixDiskLib_ConnectEx (h->params,
readonly,
snapshot_moref,
transport_modes,
&h->connection);
- } VDDK_CALL_END (VixDiskLib_ConnectEx);
+ VDDK_CALL_END (VixDiskLib_ConnectEx, 0);
if (err != VIX_OK) {
VDDK_ERROR (err, "VixDiskLib_ConnectEx");
goto err1;
@@ -744,25 +732,25 @@ vddk_open (int readonly)
}
VDDK_CALL_START (VixDiskLib_Open,
- "connection, %s, %d, &handle", filename, flags) {
+ "connection, %s, %d, &handle", filename, flags)
err = VixDiskLib_Open (h->connection, filename, flags, &h->handle);
- } VDDK_CALL_END (VixDiskLib_Open);
+ VDDK_CALL_END (VixDiskLib_Open, 0);
if (err != VIX_OK) {
VDDK_ERROR (err, "VixDiskLib_Open: %s", filename);
goto err2;
}
- VDDK_CALL_START (VixDiskLib_GetTransportMode, "handle") {
+ VDDK_CALL_START (VixDiskLib_GetTransportMode, "handle")
transport_mode = VixDiskLib_GetTransportMode (h->handle);
- } VDDK_CALL_END (VixDiskLib_GetTransportMode);
+ VDDK_CALL_END (VixDiskLib_GetTransportMode, 0);
nbdkit_debug ("transport mode: %s", transport_mode);
return h;
err2:
- VDDK_CALL_START (VixDiskLib_Disconnect, "connection") {
+ VDDK_CALL_START (VixDiskLib_Disconnect, "connection")
VixDiskLib_Disconnect (h->connection);
- } VDDK_CALL_END (VixDiskLib_Disconnect);
+ VDDK_CALL_END (VixDiskLib_Disconnect, 0);
err1:
free_connect_params (h->params);
err0:
@@ -777,12 +765,12 @@ vddk_close (void *handle)
ACQUIRE_LOCK_FOR_CURRENT_SCOPE (&open_close_lock);
struct vddk_handle *h = handle;
- VDDK_CALL_START (VixDiskLib_Close, "handle") {
+ VDDK_CALL_START (VixDiskLib_Close, "handle")
VixDiskLib_Close (h->handle);
- } VDDK_CALL_END (VixDiskLib_Close);
- VDDK_CALL_START (VixDiskLib_Disconnect, "connection") {
+ VDDK_CALL_END (VixDiskLib_Close, 0);
+ VDDK_CALL_START (VixDiskLib_Disconnect, "connection")
VixDiskLib_Disconnect (h->connection);
- } VDDK_CALL_END (VixDiskLib_Disconnect);
+ VDDK_CALL_END (VixDiskLib_Disconnect, 0);
free_connect_params (h->params);
free (h);
@@ -797,9 +785,9 @@ vddk_get_size (void *handle)
VixError err;
uint64_t size;
- VDDK_CALL_START (VixDiskLib_GetInfo, "handle, &info") {
+ VDDK_CALL_START (VixDiskLib_GetInfo, "handle, &info")
err = VixDiskLib_GetInfo (h->handle, &info);
- } VDDK_CALL_END (VixDiskLib_GetInfo);
+ VDDK_CALL_END (VixDiskLib_GetInfo, 0);
if (err != VIX_OK) {
VDDK_ERROR (err, "VixDiskLib_GetInfo");
return -1;
@@ -828,9 +816,9 @@ vddk_get_size (void *handle)
info->uuid ? : "NULL");
}
- VDDK_CALL_START (VixDiskLib_FreeInfo, "info") {
+ VDDK_CALL_START (VixDiskLib_FreeInfo, "info")
VixDiskLib_FreeInfo (info);
- } VDDK_CALL_END (VixDiskLib_FreeInfo);
+ VDDK_CALL_END (VixDiskLib_FreeInfo, 0);
return (int64_t) size;
}
@@ -858,12 +846,12 @@ vddk_pread (void *handle, void *buf, uint32_t count, uint64_t offset,
offset /= VIXDISKLIB_SECTOR_SIZE;
count /= VIXDISKLIB_SECTOR_SIZE;
- VDDK_CALL_START_DATAPATH (VixDiskLib_Read,
- "handle, %" PRIu64 " sectors, "
- "%" PRIu32 " sectors, buffer",
- offset, count) {
+ VDDK_CALL_START (VixDiskLib_Read,
+ "handle, %" PRIu64 " sectors, "
+ "%" PRIu32 " sectors, buffer",
+ offset, count)
err = VixDiskLib_Read (h->handle, offset, count, buf);
- } VDDK_CALL_END_DATAPATH (VixDiskLib_Read, count * VIXDISKLIB_SECTOR_SIZE);
+ VDDK_CALL_END (VixDiskLib_Read, count * VIXDISKLIB_SECTOR_SIZE);
if (err != VIX_OK) {
VDDK_ERROR (err, "VixDiskLib_Read");
return -1;
@@ -898,12 +886,12 @@ vddk_pwrite (void *handle, const void *buf, uint32_t count, uint64_t offset,
offset /= VIXDISKLIB_SECTOR_SIZE;
count /= VIXDISKLIB_SECTOR_SIZE;
- VDDK_CALL_START_DATAPATH (VixDiskLib_Write,
- "handle, %" PRIu64 " sectors, "
- "%" PRIu32 " sectors, buffer",
- offset, count) {
+ VDDK_CALL_START (VixDiskLib_Write,
+ "handle, %" PRIu64 " sectors, "
+ "%" PRIu32 " sectors, buffer",
+ offset, count)
err = VixDiskLib_Write (h->handle, offset, count, buf);
- } VDDK_CALL_END_DATAPATH (VixDiskLib_Write, count * VIXDISKLIB_SECTOR_SIZE);
+ VDDK_CALL_END (VixDiskLib_Write, count * VIXDISKLIB_SECTOR_SIZE);
if (err != VIX_OK) {
VDDK_ERROR (err, "VixDiskLib_Write");
return -1;
@@ -938,9 +926,9 @@ vddk_flush (void *handle, uint32_t flags)
struct vddk_handle *h = handle;
VixError err;
- VDDK_CALL_START (VixDiskLib_Flush, "handle") {
+ VDDK_CALL_START (VixDiskLib_Flush, "handle")
err = VixDiskLib_Flush (h->handle);
- } VDDK_CALL_END (VixDiskLib_Flush);
+ VDDK_CALL_END (VixDiskLib_Flush, 0);
if (err != VIX_OK) {
VDDK_ERROR (err, "VixDiskLib_Flush");
return -1;
@@ -976,17 +964,17 @@ vddk_can_extents (void *handle)
*/
VDDK_CALL_START (VixDiskLib_QueryAllocatedBlocks,
"handle, 0, %d sectors, %d sectors",
- VIXDISKLIB_MIN_CHUNK_SIZE, VIXDISKLIB_MIN_CHUNK_SIZE) {
+ VIXDISKLIB_MIN_CHUNK_SIZE, VIXDISKLIB_MIN_CHUNK_SIZE)
err = VixDiskLib_QueryAllocatedBlocks (h->handle,
0, VIXDISKLIB_MIN_CHUNK_SIZE,
VIXDISKLIB_MIN_CHUNK_SIZE,
&block_list);
- } VDDK_CALL_END (VixDiskLib_QueryAllocatedBlocks);
+ VDDK_CALL_END (VixDiskLib_QueryAllocatedBlocks, 0);
error_suppression = 0;
if (err == VIX_OK) {
- VDDK_CALL_START (VixDiskLib_FreeBlockList, "block_list") {
+ VDDK_CALL_START (VixDiskLib_FreeBlockList, "block_list")
VixDiskLib_FreeBlockList (block_list);
- } VDDK_CALL_END (VixDiskLib_FreeBlockList);
+ VDDK_CALL_END (VixDiskLib_FreeBlockList, 0);
}
if (err != VIX_OK) {
char *errmsg = VixDiskLib_GetErrorText (err, NULL);
@@ -1066,12 +1054,12 @@ vddk_extents (void *handle, uint32_t count, uint64_t offset, uint32_t flags,
VDDK_CALL_START (VixDiskLib_QueryAllocatedBlocks,
"handle, %" PRIu64 " sectors, %" PRIu64 " sectors, "
"%d sectors",
- start_sector, nr_sectors, VIXDISKLIB_MIN_CHUNK_SIZE) {
+ start_sector, nr_sectors, VIXDISKLIB_MIN_CHUNK_SIZE)
err = VixDiskLib_QueryAllocatedBlocks (h->handle,
start_sector, nr_sectors,
VIXDISKLIB_MIN_CHUNK_SIZE,
&block_list);
- } VDDK_CALL_END (VixDiskLib_QueryAllocatedBlocks);
+ VDDK_CALL_END (VixDiskLib_QueryAllocatedBlocks, 0);
if (err != VIX_OK) {
VDDK_ERROR (err, "VixDiskLib_QueryAllocatedBlocks");
return -1;
@@ -1090,15 +1078,15 @@ vddk_extents (void *handle, uint32_t count, uint64_t offset, uint32_t flags,
add_extent (extents, &position, blk_offset, true) == -1) ||
(add_extent (extents,
&position, blk_offset + blk_length, false) == -1)) {
- VDDK_CALL_START (VixDiskLib_FreeBlockList, "block_list") {
+ VDDK_CALL_START (VixDiskLib_FreeBlockList, "block_list")
VixDiskLib_FreeBlockList (block_list);
- } VDDK_CALL_END (VixDiskLib_FreeBlockList);
+ VDDK_CALL_END (VixDiskLib_FreeBlockList, 0);
return -1;
}
}
- VDDK_CALL_START (VixDiskLib_FreeBlockList, "block_list") {
+ VDDK_CALL_START (VixDiskLib_FreeBlockList, "block_list")
VixDiskLib_FreeBlockList (block_list);
- } VDDK_CALL_END (VixDiskLib_FreeBlockList);
+ VDDK_CALL_END (VixDiskLib_FreeBlockList, 0);
/* There's an implicit hole after the returned list of blocks, up
* to the end of the QueryAllocatedBlocks request.
--
2.31.1

84
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@ -0,0 +1,84 @@
From 5bd343fff4a8bb7a115e4b39555a727b33ba52dd Mon Sep 17 00:00:00 2001
From: "Richard W.M. Jones" <rjones@redhat.com>
Date: Fri, 22 Oct 2021 18:00:27 +0100
Subject: [PATCH] vddk: Document troubleshooting performance problems
Document how to use -D vddk.stats=1 to diagnose performance problems
with VDDK.
(cherry picked from commit e491978c193f49010cc28ad344d0fb3c1b5ede35)
---
plugins/vddk/nbdkit-vddk-plugin.pod | 57 +++++++++++++++++++++++++++++
1 file changed, 57 insertions(+)
diff --git a/plugins/vddk/nbdkit-vddk-plugin.pod b/plugins/vddk/nbdkit-vddk-plugin.pod
index 88df0ddb..6c50877e 100644
--- a/plugins/vddk/nbdkit-vddk-plugin.pod
+++ b/plugins/vddk/nbdkit-vddk-plugin.pod
@@ -475,6 +475,63 @@ and restarting the C<hostd> service:
For more information see L<https://bugzilla.redhat.com/1614276>.
+=head2 Troubleshooting performance problems
+
+VDDK has very uneven performance with some operations being very slow.
+This plugin has options to allow you to debug performance issues. If
+your application has a debug or diagnostic setting, add the following
+nbdkit command line options:
+
+ -v -D nbdkit.backend.datapath=0 -D vddk.datapath=0 -D vddk.stats=1
+
+C<-v> enables verbose messages and the two datapath options I<disable>
+the very verbose per-read/-write messages. C<-D vddk.stats=1> enables
+a summary when nbdkit exits of the cumulative time taken in each VDDK
+function, the number of times each function was called, and (for read
+and write) the number of bytes transferred. An example of what those
+stats look like can be found here:
+L<https://gitlab.com/nbdkit/nbdkit/-/commit/5c80f0d290db45a679d55baf37ff39bacb8ce7ec>
+
+You can interpret the stats as follows:
+
+=over 4
+
+=item C<Read>
+
+The cumulative time spent waiting for VDDK to return from
+C<VixDiskLib_Read> calls, the number of times this function was
+called, and the total bytes read. You can use this to determine the
+read bandwidth to the VMware server.
+
+=item C<Write>
+
+=item C<Flush>
+
+Same as above, but for writing and flushing writes.
+
+=item C<QueryAllocatedBlocks>
+
+This call is used to query information about the sparseness of the
+remote disk. It is only available in VDDK E<ge> 6.7. The call is
+notably very slow in all versions of VMware we have tested.
+
+=item C<Open>
+
+=item C<Close>
+
+=item C<ConnectEx>
+
+=item C<Disconnect>
+
+=item C<InitEx>
+
+=item C<Exit>
+
+The cumulative time spent connecting and disconnecting from the VMware
+server, which can also be very slow.
+
+=back
+
=head1 SUPPORTED VERSIONS OF VDDK
This plugin requires VDDK E<ge> 5.5.5, which in turn means that it
--
2.31.1

141
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@ -0,0 +1,141 @@
From 7777f1a86f692a9e9bc720e29272321f124208b8 Mon Sep 17 00:00:00 2001
From: "Richard W.M. Jones" <rjones@redhat.com>
Date: Sat, 23 Oct 2021 16:16:39 +0100
Subject: [PATCH] vddk: Include VDDK major library version in --dump-plugin
output
Although it doesn't seem to be possible to get the precise VDDK
version, With a relatively simple change we can at least return the
VDDK major version. Currently this can be 5, 6 or 7.
(cherry picked from commit 8700649d147948897f3b97810a1dff37924bdd6e)
---
plugins/vddk/nbdkit-vddk-plugin.pod | 4 ++++
plugins/vddk/vddk.c | 29 +++++++++++++++++++----------
tests/test-vddk-real-dump-plugin.sh | 2 ++
3 files changed, 25 insertions(+), 10 deletions(-)
diff --git a/plugins/vddk/nbdkit-vddk-plugin.pod b/plugins/vddk/nbdkit-vddk-plugin.pod
index 6c50877e..5c356cc4 100644
--- a/plugins/vddk/nbdkit-vddk-plugin.pod
+++ b/plugins/vddk/nbdkit-vddk-plugin.pod
@@ -422,6 +422,10 @@ at runtime.
If this is printed then the C<nfchostport=PORT> parameter is supported
by this build.
+=item C<vddk_library_version=...>
+
+The VDDK major library version: 5, 6, 7, ...
+
=item C<vddk_dll=...>
Prints the full path to the VDDK shared library. Since this requires
diff --git a/plugins/vddk/vddk.c b/plugins/vddk/vddk.c
index 85b0c722..14e7ada9 100644
--- a/plugins/vddk/vddk.c
+++ b/plugins/vddk/vddk.c
@@ -81,6 +81,7 @@ NBDKIT_DLL_PUBLIC int vddk_debug_stats;
static void *dl; /* dlopen handle */
static bool init_called; /* was InitEx called */
static __thread int error_suppression; /* threadlocal error suppression */
+static int library_version; /* VDDK major: 5, 6, 7, ... */
static enum { NONE = 0, ZLIB, FASTLZ, SKIPZ } compression; /* compression */
static char *config; /* config */
@@ -405,7 +406,10 @@ vddk_config (const char *key, const char *value)
static void
load_library (bool load_error_is_fatal)
{
- static const char *sonames[] = {
+ static struct {
+ const char *soname;
+ int library_version;
+ } libs[] = {
/* Prefer the newest library in case multiple exist. Check two
* possible directories: the usual VDDK installation puts .so
* files in an arch-specific subdirectory of $libdir (our minimum
@@ -413,12 +417,13 @@ load_library (bool load_error_is_fatal)
* but our testsuite is easier to write if we point libdir
* directly to a stub .so.
*/
- "lib64/libvixDiskLib.so.7",
- "libvixDiskLib.so.7",
- "lib64/libvixDiskLib.so.6",
- "libvixDiskLib.so.6",
- "lib64/libvixDiskLib.so.5",
- "libvixDiskLib.so.5",
+ { "lib64/libvixDiskLib.so.7", 7 },
+ { "libvixDiskLib.so.7", 7 },
+ { "lib64/libvixDiskLib.so.6", 6 },
+ { "libvixDiskLib.so.6", 6 },
+ { "lib64/libvixDiskLib.so.5", 5 },
+ { "libvixDiskLib.so.5", 5 },
+ { NULL }
};
size_t i;
CLEANUP_FREE char *orig_error = NULL;
@@ -431,19 +436,20 @@ load_library (bool load_error_is_fatal)
}
}
- for (i = 0; i < sizeof sonames / sizeof sonames[0]; ++i) {
+ for (i = 0; libs[i].soname != NULL; ++i) {
CLEANUP_FREE char *path;
/* Set the full path so that dlopen will preferentially load the
* system libraries from the same directory.
*/
- if (asprintf (&path, "%s/%s", libdir, sonames[i]) == -1) {
+ if (asprintf (&path, "%s/%s", libdir, libs[i].soname) == -1) {
nbdkit_error ("asprintf: %m");
exit (EXIT_FAILURE);
}
dl = dlopen (path, RTLD_NOW);
if (dl != NULL) {
+ library_version = libs[i].library_version;
/* Now that we found the library, ensure that LD_LIBRARY_PATH
* includes its directory for all future loads. This may modify
* path in-place and/or re-exec nbdkit, but that's okay.
@@ -464,10 +470,12 @@ load_library (bool load_error_is_fatal)
"If '%s' is located on a non-standard path you may need to\n"
"set libdir=/path/to/vmware-vix-disklib-distrib.\n\n"
"See nbdkit-vddk-plugin(1) man page section \"LIBRARY LOCATION\" for details.",
- orig_error ? : "(unknown error)", sonames[0]);
+ orig_error ? : "(unknown error)", libs[0].soname);
exit (EXIT_FAILURE);
}
+ assert (library_version >= 5);
+
/* Load symbols. */
#define STUB(fn,ret,args) \
do { \
@@ -583,6 +591,7 @@ vddk_dump_plugin (void)
printf ("vddk_default_libdir=%s\n", VDDK_LIBDIR);
printf ("vddk_has_nfchostport=1\n");
+ printf ("vddk_library_version=%d\n", library_version);
#if defined(HAVE_DLADDR)
/* It would be nice to print the version of VDDK from the shared
diff --git a/tests/test-vddk-real-dump-plugin.sh b/tests/test-vddk-real-dump-plugin.sh
index 1479e416..59c79693 100755
--- a/tests/test-vddk-real-dump-plugin.sh
+++ b/tests/test-vddk-real-dump-plugin.sh
@@ -51,10 +51,12 @@ rm -f $files
cleanup_fn rm -f $files
nbdkit -f -v vddk libdir="$vddkdir" --dump-plugin > $out
+cat $out
# Check the vddk_* entries are set.
grep ^vddk_default_libdir= $out
grep ^vddk_has_nfchostport= $out
+grep ^vddk_library_version= $out
grep ^vddk_dll= $out
dll="$(grep ^vddk_dll $out | cut -d= -f2)"
--
2.31.1

52
0006-vddk-Add-logical-and-physical-sector-size-to-D-vddk..patch Normal file
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@ -0,0 +1,52 @@
From b4a6854a45eed920ed6631c8c38e979b95a52470 Mon Sep 17 00:00:00 2001
From: "Richard W.M. Jones" <rjones@redhat.com>
Date: Sat, 23 Oct 2021 16:24:27 +0100
Subject: [PATCH] vddk: Add logical and physical sector size to -D
vddk.diskinfo output
In VDDK >= 7 it is possible to display the logical and physical sector
size in debug output.
This commit also extends the test since this flag was not tested
before.
(cherry picked from commit 5bb8f0586e1faabcbf4f43d722a3b3cb5b352e33)
---
plugins/vddk/vddk.c | 6 ++++++
tests/test-vddk-real.sh | 3 ++-
2 files changed, 8 insertions(+), 1 deletion(-)
diff --git a/plugins/vddk/vddk.c b/plugins/vddk/vddk.c
index 14e7ada9..290a99a8 100644
--- a/plugins/vddk/vddk.c
+++ b/plugins/vddk/vddk.c
@@ -823,6 +823,12 @@ vddk_get_size (void *handle)
info->parentFileNameHint ? : "NULL");
nbdkit_debug ("disk info: uuid: %s",
info->uuid ? : "NULL");
+ if (library_version >= 7) {
+ nbdkit_debug ("disk info: sectory size: "
+ "logical %" PRIu32 " physical %" PRIu32,
+ info->logicalSectorSize,
+ info->physicalSectorSize);
+ }
}
VDDK_CALL_START (VixDiskLib_FreeInfo, "info")
diff --git a/tests/test-vddk-real.sh b/tests/test-vddk-real.sh
index 08f6f8d8..b5f85067 100755
--- a/tests/test-vddk-real.sh
+++ b/tests/test-vddk-real.sh
@@ -82,7 +82,8 @@ if grep 'cannot open shared object file' test-vddk-real.log; then
fi
# Now run nbdkit for the test.
-start_nbdkit -P $pid -U $sock -D vddk.stats=1 vddk libdir="$vddkdir" $vmdk
+start_nbdkit -P $pid -U $sock -D vddk.stats=1 -D vddk.diskinfo=1 \
+ vddk libdir="$vddkdir" $vmdk
uri="nbd+unix:///?socket=$sock"
# VDDK < 6.0 did not support flush, so disable flush test there. Also
--
2.31.1

27
0007-vddk-Fix-typo-in-debug-message.patch Normal file
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@ -0,0 +1,27 @@
From a11757f193bc86f74cb67b52b727bd9b762bf573 Mon Sep 17 00:00:00 2001
From: "Richard W.M. Jones" <rjones@redhat.com>
Date: Sat, 23 Oct 2021 19:41:07 +0100
Subject: [PATCH] vddk: Fix typo in debug message
Fixes: commit 5bb8f0586e1faabcbf4f43d722a3b3cb5b352e33
(cherry picked from commit 343dadeb7340d7b8c5730e2bbab33c829b569122)
---
plugins/vddk/vddk.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/plugins/vddk/vddk.c b/plugins/vddk/vddk.c
index 290a99a8..e206a47f 100644
--- a/plugins/vddk/vddk.c
+++ b/plugins/vddk/vddk.c
@@ -824,7 +824,7 @@ vddk_get_size (void *handle)
nbdkit_debug ("disk info: uuid: %s",
info->uuid ? : "NULL");
if (library_version >= 7) {
- nbdkit_debug ("disk info: sectory size: "
+ nbdkit_debug ("disk info: sector size: "
"logical %" PRIu32 " physical %" PRIu32,
info->logicalSectorSize,
info->physicalSectorSize);
--
2.31.1

55
0008-vddk-Only-print-vddk_library_version-when-we-managed.patch Normal file
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@ -0,0 +1,55 @@
From 574d356f6c55b8f0873586a20b07f7a898e955b0 Mon Sep 17 00:00:00 2001
From: "Richard W.M. Jones" <rjones@redhat.com>
Date: Sat, 23 Oct 2021 19:50:52 +0100
Subject: [PATCH] vddk: Only print vddk_library_version when we managed to load
the library
Because --dump-plugin calls load_library (false) it won't fail if we
didn't manage to load the library. This results in library_version
being 0, which we printed incorrectly.
Resolve this problem by not printing the vddk_library_version entry in
this case.
Fixes: commit 8700649d147948897f3b97810a1dff37924bdd6e
(cherry picked from commit a3fba12c3e9c2113009f556360ae0bd04c45f6bb)
---
plugins/vddk/nbdkit-vddk-plugin.pod | 1 +
plugins/vddk/vddk.c | 9 ++++++++-
2 files changed, 9 insertions(+), 1 deletion(-)
diff --git a/plugins/vddk/nbdkit-vddk-plugin.pod b/plugins/vddk/nbdkit-vddk-plugin.pod
index 5c356cc4..a5534f2e 100644
--- a/plugins/vddk/nbdkit-vddk-plugin.pod
+++ b/plugins/vddk/nbdkit-vddk-plugin.pod
@@ -425,6 +425,7 @@ by this build.
=item C<vddk_library_version=...>
The VDDK major library version: 5, 6, 7, ...
+If this is omitted it means the library could not be loaded.
=item C<vddk_dll=...>
diff --git a/plugins/vddk/vddk.c b/plugins/vddk/vddk.c
index e206a47f..e54eb9a8 100644
--- a/plugins/vddk/vddk.c
+++ b/plugins/vddk/vddk.c
@@ -591,7 +591,14 @@ vddk_dump_plugin (void)
printf ("vddk_default_libdir=%s\n", VDDK_LIBDIR);
printf ("vddk_has_nfchostport=1\n");
- printf ("vddk_library_version=%d\n", library_version);
+
+ /* Because load_library (false) we might not have loaded VDDK, in
+ * which case we didn't set library_version. Note this cannot
+ * happen in the normal (non-debug-plugin) path because there we use
+ * load_library (true).
+ */
+ if (library_version > 0)
+ printf ("vddk_library_version=%d\n", library_version);
#if defined(HAVE_DLADDR)
/* It would be nice to print the version of VDDK from the shared
--
2.31.1

72
0009-vddk-Print-one-line-in-dump-plugin-output-for-each-V.patch Normal file
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@ -0,0 +1,72 @@
From bb1c6bc5db8169498e05adce22b01ac51eaaae47 Mon Sep 17 00:00:00 2001
From: "Richard W.M. Jones" <rjones@redhat.com>
Date: Mon, 25 Oct 2021 08:36:53 +0100
Subject: [PATCH] vddk: Print one line in --dump-plugin output for each VDDK
API
Helps when detecting if certain optional features are being used, such
as flush and extents.
(cherry picked from commit 4ee13559e46cf622410d0bdd7db29bb00908b40a)
---
plugins/vddk/nbdkit-vddk-plugin.pod | 9 +++++++++
plugins/vddk/vddk.c | 10 ++++++++++
tests/test-vddk-real-dump-plugin.sh | 1 +
3 files changed, 20 insertions(+)
diff --git a/plugins/vddk/nbdkit-vddk-plugin.pod b/plugins/vddk/nbdkit-vddk-plugin.pod
index a5534f2e..fd8950c2 100644
--- a/plugins/vddk/nbdkit-vddk-plugin.pod
+++ b/plugins/vddk/nbdkit-vddk-plugin.pod
@@ -432,6 +432,15 @@ If this is omitted it means the library could not be loaded.
Prints the full path to the VDDK shared library. Since this requires
a glibc extension it may not be available in all builds of the plugin.
+=item C<VixDiskLib_...=1>
+
+For each VDDK API that the plugin uses I<and> which is present in the
+VDDK library that was loaded, we print the name of the API
+(eg. C<VixDiskLib_Open=1>). This lets you see which optional APIs are
+available, such as C<VixDiskLib_Flush> and
+C<VixDiskLib_QueryAllocatedBlocks>. If the library could not be
+loaded then these lines are not printed.
+
=back
=head1 NOTES
diff --git a/plugins/vddk/vddk.c b/plugins/vddk/vddk.c
index e54eb9a8..8955bc51 100644
--- a/plugins/vddk/vddk.c
+++ b/plugins/vddk/vddk.c
@@ -616,6 +616,16 @@ vddk_dump_plugin (void)
printf ("vddk_dll=%s\n", p);
}
#endif
+
+ /* Note we print all VDDK APIs found here, not just the optional
+ * ones. That is so if we update the baseline VDDK in future and
+ * make optional into required APIs, the output doesn't change.
+ */
+#define STUB(fn,ret,args) if (fn != NULL) printf ("%s=1\n", #fn);
+#define OPTIONAL_STUB(fn,ret,args) STUB(fn,ret,args)
+#include "vddk-stubs.h"
+#undef STUB
+#undef OPTIONAL_STUB
}
/* The rules on threads and VDDK are here:
diff --git a/tests/test-vddk-real-dump-plugin.sh b/tests/test-vddk-real-dump-plugin.sh
index 59c79693..92e1f3d2 100755
--- a/tests/test-vddk-real-dump-plugin.sh
+++ b/tests/test-vddk-real-dump-plugin.sh
@@ -58,6 +58,7 @@ grep ^vddk_default_libdir= $out
grep ^vddk_has_nfchostport= $out
grep ^vddk_library_version= $out
grep ^vddk_dll= $out
+grep ^VixDiskLib_Open=1 $out
dll="$(grep ^vddk_dll $out | cut -d= -f2)"
test -f "$dll"
--
2.31.1

31
0010-vddk-Update-comment-about-VixDiskLib_PrepareForAcces.patch Normal file
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@ -0,0 +1,31 @@
From 72f0a3ce7635c4a94135cb037ae9d36e82bd5f73 Mon Sep 17 00:00:00 2001
From: "Richard W.M. Jones" <rjones@redhat.com>
Date: Tue, 26 Oct 2021 12:55:14 +0100
Subject: [PATCH] vddk: Update comment about VixDiskLib_PrepareForAccess
(cherry picked from commit 5875b3d93c8c913aa96ac5d5a605d081d6a21393)
---
plugins/vddk/vddk.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/plugins/vddk/vddk.c b/plugins/vddk/vddk.c
index 8955bc51..fc377a29 100644
--- a/plugins/vddk/vddk.c
+++ b/plugins/vddk/vddk.c
@@ -721,10 +721,9 @@ vddk_open (int readonly)
h->params->specType = VIXDISKLIB_SPEC_VMX;
}
- /* XXX Some documentation suggests we should call
- * VixDiskLib_PrepareForAccess here. It may be required for
- * Advanced Transport modes, but I could not make it work with
- * either ESXi or vCenter servers.
+ /* XXX We should call VixDiskLib_PrepareForAccess here. It disables
+ * live storage migration (Storage VMotion) of the VM while we are
+ * accessing it, and may be required for "Advanced Transport modes".
*/
VDDK_CALL_START (VixDiskLib_ConnectEx,
--
2.31.1

32
0011-vddk-Document-what-I-found-about-VixDiskLib_Flush.patch Normal file
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@ -0,0 +1,32 @@
From 6c8f9fada5d50dc3ee5a1304420fdee3ed023d9f Mon Sep 17 00:00:00 2001
From: "Richard W.M. Jones" <rjones@redhat.com>
Date: Tue, 26 Oct 2021 14:30:43 +0100
Subject: [PATCH] vddk: Document what I found about VixDiskLib_Flush
(cherry picked from commit b79a59a81255bfd64ba403994bdf3ef4581e6535)
---
plugins/vddk/vddk.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/plugins/vddk/vddk.c b/plugins/vddk/vddk.c
index fc377a29..c506b5a1 100644
--- a/plugins/vddk/vddk.c
+++ b/plugins/vddk/vddk.c
@@ -957,6 +957,14 @@ vddk_flush (void *handle, uint32_t flags)
struct vddk_handle *h = handle;
VixError err;
+ /* The documentation for Flush is missing, but the comment in the
+ * header file seems to indicate that it waits for WriteAsync
+ * commands to finish. We don't use WriteAsync, and in any case
+ * there's a new function Wait to wait for those. However I
+ * verified using strace that in fact Flush does call fsync on the
+ * file so it appears to be the correct call to use here.
+ */
+
VDDK_CALL_START (VixDiskLib_Flush, "handle")
err = VixDiskLib_Flush (h->handle);
VDDK_CALL_END (VixDiskLib_Flush, 0);
--
2.31.1

26
0012-vddk-Note-that-we-have-tested-VDDK-7.0.3.patch Normal file
View File

@ -0,0 +1,26 @@
From 21bfaf35b4a0eb825a3db5736792dac97d1dd7c2 Mon Sep 17 00:00:00 2001
From: "Richard W.M. Jones" <rjones@redhat.com>
Date: Tue, 26 Oct 2021 19:44:46 +0100
Subject: [PATCH] vddk: Note that we have tested VDDK 7.0.3
(cherry picked from commit 189e9d52a4d6ea1bcb6a9368c954a1a80802262d)
---
plugins/vddk/nbdkit-vddk-plugin.pod | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/plugins/vddk/nbdkit-vddk-plugin.pod b/plugins/vddk/nbdkit-vddk-plugin.pod
index fd8950c2..0702aa75 100644
--- a/plugins/vddk/nbdkit-vddk-plugin.pod
+++ b/plugins/vddk/nbdkit-vddk-plugin.pod
@@ -551,7 +551,7 @@ server, which can also be very slow.
This plugin requires VDDK E<ge> 5.5.5, which in turn means that it
is only supported on x64-64 platforms.
-It has been tested with all versions up to 7.0.2 (but should work with
+It has been tested with all versions up to 7.0.3 (but should work with
future versions).
VDDK E<ge> 6.0 should be used if possible. This is the first version
--
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@ -0,0 +1,147 @@
From a50111258e315abe3f8f2bf89cb72a1d6711f454 Mon Sep 17 00:00:00 2001
From: "Richard W.M. Jones" <rjones@redhat.com>
Date: Tue, 26 Oct 2021 19:46:32 +0100
Subject: [PATCH] vddk: Move minimum version to VDDK 6.5
Drop support for VDDK 5.5.5 (released in 2015) and 6.0 (released the
same year). Move minimum supported version to 6.5 (released Nov
2016). This is so we can use asynchronous operations.
Acked-by: Laszlo Ersek <lersek@redhat.com>
(cherry picked from commit 5ed23616762a72e039531a9a7cd81353cd4f436e)
---
plugins/vddk/nbdkit-vddk-plugin.pod | 10 +++-------
plugins/vddk/vddk-stubs.h | 3 +--
plugins/vddk/vddk.c | 24 ++++++++++++++++--------
tests/dummy-vddk.c | 6 ++++++
4 files changed, 26 insertions(+), 17 deletions(-)
diff --git a/plugins/vddk/nbdkit-vddk-plugin.pod b/plugins/vddk/nbdkit-vddk-plugin.pod
index 0702aa75..1c16d096 100644
--- a/plugins/vddk/nbdkit-vddk-plugin.pod
+++ b/plugins/vddk/nbdkit-vddk-plugin.pod
@@ -424,7 +424,7 @@ by this build.
=item C<vddk_library_version=...>
-The VDDK major library version: 5, 6, 7, ...
+The VDDK major library version: 6, 7, ...
If this is omitted it means the library could not be loaded.
=item C<vddk_dll=...>
@@ -548,16 +548,12 @@ server, which can also be very slow.
=head1 SUPPORTED VERSIONS OF VDDK
-This plugin requires VDDK E<ge> 5.5.5, which in turn means that it
-is only supported on x64-64 platforms.
+This plugin requires VDDK E<ge> 6.5 (released Nov 2016). It is only
+supported on the x64-64 archtecture.
It has been tested with all versions up to 7.0.3 (but should work with
future versions).
-VDDK E<ge> 6.0 should be used if possible. This is the first version
-which added Flush support which is crucial for data integrity when
-writing.
-
VDDK 6.7 was the first version that supported the
C<VixDiskLib_QueryAllocatedBlocks> API, required to provide extent
information over NBD.
diff --git a/plugins/vddk/vddk-stubs.h b/plugins/vddk/vddk-stubs.h
index 5e70238d..a94df9cd 100644
--- a/plugins/vddk/vddk-stubs.h
+++ b/plugins/vddk/vddk-stubs.h
@@ -40,8 +40,7 @@
*/
/* Required stubs, present in all versions of VDDK that we support. I
- * have checked that all these exist in at least VDDK 5.5.5 (2015)
- * which is the earliest version of VDDK that we support.
+ * have checked that all these exist in at least VDDK 5.5.5 (2015).
*/
STUB (VixDiskLib_InitEx,
diff --git a/plugins/vddk/vddk.c b/plugins/vddk/vddk.c
index c506b5a1..bf12c3c9 100644
--- a/plugins/vddk/vddk.c
+++ b/plugins/vddk/vddk.c
@@ -75,13 +75,13 @@ NBDKIT_DLL_PUBLIC int vddk_debug_stats;
#undef OPTIONAL_STUB
/* Parameters passed to InitEx. */
-#define VDDK_MAJOR 5
+#define VDDK_MAJOR 6
#define VDDK_MINOR 5
static void *dl; /* dlopen handle */
static bool init_called; /* was InitEx called */
static __thread int error_suppression; /* threadlocal error suppression */
-static int library_version; /* VDDK major: 5, 6, 7, ... */
+static int library_version; /* VDDK major: 6, 7, ... */
static enum { NONE = 0, ZLIB, FASTLZ, SKIPZ } compression; /* compression */
static char *config; /* config */
@@ -413,16 +413,14 @@ load_library (bool load_error_is_fatal)
/* Prefer the newest library in case multiple exist. Check two
* possible directories: the usual VDDK installation puts .so
* files in an arch-specific subdirectory of $libdir (our minimum
- * supported version is VDDK 5.5.5, which only supports x64-64);
- * but our testsuite is easier to write if we point libdir
- * directly to a stub .so.
+ * supported version is VDDK 6.5, which only supports x64-64); but
+ * our testsuite is easier to write if we point libdir directly to
+ * a stub .so.
*/
{ "lib64/libvixDiskLib.so.7", 7 },
{ "libvixDiskLib.so.7", 7 },
{ "lib64/libvixDiskLib.so.6", 6 },
{ "libvixDiskLib.so.6", 6 },
- { "lib64/libvixDiskLib.so.5", 5 },
- { "libvixDiskLib.so.5", 5 },
{ NULL }
};
size_t i;
@@ -474,7 +472,7 @@ load_library (bool load_error_is_fatal)
exit (EXIT_FAILURE);
}
- assert (library_version >= 5);
+ assert (library_version >= 6);
/* Load symbols. */
#define STUB(fn,ret,args) \
@@ -490,6 +488,16 @@ load_library (bool load_error_is_fatal)
#include "vddk-stubs.h"
#undef STUB
#undef OPTIONAL_STUB
+
+ /* Additionally, VDDK version must be >= 6.5. This was the first
+ * version which introduced VixDiskLib_Wait symbol so we can check
+ * for that.
+ */
+ if (VixDiskLib_Wait == NULL) {
+ nbdkit_error ("VDDK version must be >= 6.5. "
+ "See nbdkit-vddk-plugin(1) man page section \"SUPPORTED VERSIONS OF VDDK\".");
+ exit (EXIT_FAILURE);
+ }
}
static int
diff --git a/tests/dummy-vddk.c b/tests/dummy-vddk.c
index 9b5ae0a2..cb88380c 100644
--- a/tests/dummy-vddk.c
+++ b/tests/dummy-vddk.c
@@ -198,3 +198,9 @@ VixDiskLib_Write (VixDiskLibHandle handle,
memcpy (disk + offset, buf, nr_sectors * VIXDISKLIB_SECTOR_SIZE);
return VIX_OK;
}
+
+NBDKIT_DLL_PUBLIC VixError
+VixDiskLib_Wait (VixDiskLibHandle handle)
+{
+ return VIX_OK;
+}
--
2.31.1

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@ -0,0 +1,72 @@
From cf60f0e3a2f6fb8efe79ec41ca284050990b4d79 Mon Sep 17 00:00:00 2001
From: "Richard W.M. Jones" <rjones@redhat.com>
Date: Wed, 27 Oct 2021 11:57:35 +0100
Subject: [PATCH] vddk: Add read, write and wait asynchronous functions
These functions added in VDDK 6.0 - 6.5 implement asynchronous read
and write.
Acked-by: Laszlo Ersek <lersek@redhat.com>
(cherry picked from commit ad53e7becafed6ca3573795a79c534281fe9c274)
---
plugins/vddk/vddk-structs.h | 3 +++
plugins/vddk/vddk-stubs.h | 19 ++++++++++++++++++-
2 files changed, 21 insertions(+), 1 deletion(-)
diff --git a/plugins/vddk/vddk-structs.h b/plugins/vddk/vddk-structs.h
index aeb5bfd0..e97f017c 100644
--- a/plugins/vddk/vddk-structs.h
+++ b/plugins/vddk/vddk-structs.h
@@ -43,6 +43,7 @@
typedef uint64_t VixError;
#define VIX_OK 0
+#define VIX_ASYNC 25000
#define VIXDISKLIB_FLAG_OPEN_UNBUFFERED 1
#define VIXDISKLIB_FLAG_OPEN_SINGLE_LINK 2
@@ -61,6 +62,8 @@ typedef void *VixDiskLibHandle;
typedef void VixDiskLibGenericLogFunc (const char *fmt, va_list args);
+typedef void (*VixDiskLibCompletionCB) (void *data, VixError result);
+
enum VixDiskLibCredType {
VIXDISKLIB_CRED_UID = 1,
VIXDISKLIB_CRED_SESSIONID = 2,
diff --git a/plugins/vddk/vddk-stubs.h b/plugins/vddk/vddk-stubs.h
index a94df9cd..66353691 100644
--- a/plugins/vddk/vddk-stubs.h
+++ b/plugins/vddk/vddk-stubs.h
@@ -103,10 +103,27 @@ STUB (VixDiskLib_Write,
uint64_t start_sector, uint64_t nr_sectors,
const unsigned char *buf));
-/* Added in VDDK 6.0, this will be NULL in earlier versions. */
+/* Added in VDDK 6.0, these will be NULL in earlier versions. */
OPTIONAL_STUB (VixDiskLib_Flush,
VixError,
(VixDiskLibHandle handle));
+OPTIONAL_STUB (VixDiskLib_ReadAsync,
+ VixError,
+ (VixDiskLibHandle handle,
+ uint64_t start_sector, uint64_t nr_sectors,
+ unsigned char *buf,
+ VixDiskLibCompletionCB callback, void *data));
+OPTIONAL_STUB (VixDiskLib_WriteAsync,
+ VixError,
+ (VixDiskLibHandle handle,
+ uint64_t start_sector, uint64_t nr_sectors,
+ const unsigned char *buf,
+ VixDiskLibCompletionCB callback, void *data));
+
+/* Added in VDDK 6.5, this will be NULL in earlier versions. */
+OPTIONAL_STUB (VixDiskLib_Wait,
+ VixError,
+ (VixDiskLibHandle handle));
/* Added in VDDK 6.7, these will be NULL for earlier versions: */
OPTIONAL_STUB (VixDiskLib_QueryAllocatedBlocks,
--
2.31.1

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@ -0,0 +1,259 @@
From da7c163452d2a1f073a6d5c6d4d6fda824aa9a6f Mon Sep 17 00:00:00 2001
From: "Richard W.M. Jones" <rjones@redhat.com>
Date: Wed, 27 Oct 2021 12:20:31 +0100
Subject: [PATCH] vddk: Start to split VDDK over several files
This change doesn't do anything except move some definitions into the
header file vddk.h, but it allows future commits to split up the very
large vddk.c file.
Acked-by: Laszlo Ersek <lersek@redhat.com>
(cherry picked from commit 117634dccf4e29394e8718a8d62e93a9edf0a39c)
---
plugins/vddk/vddk.c | 91 +++++++++++++--------------------------------
plugins/vddk/vddk.h | 89 +++++++++++++++++++++++++++++++++++++++++++-
2 files changed, 112 insertions(+), 68 deletions(-)
diff --git a/plugins/vddk/vddk.c b/plugins/vddk/vddk.c
index bf12c3c9..0167aa2f 100644
--- a/plugins/vddk/vddk.c
+++ b/plugins/vddk/vddk.c
@@ -50,14 +50,12 @@
#include <nbdkit-plugin.h>
#include "cleanup.h"
-#include "isaligned.h"
#include "minmax.h"
#include "rounding.h"
#include "tvdiff.h"
#include "vector.h"
#include "vddk.h"
-#include "vddk-structs.h"
/* Debug flags. */
NBDKIT_DLL_PUBLIC int vddk_debug_diskinfo;
@@ -65,11 +63,11 @@ NBDKIT_DLL_PUBLIC int vddk_debug_extents;
NBDKIT_DLL_PUBLIC int vddk_debug_datapath = 1;
NBDKIT_DLL_PUBLIC int vddk_debug_stats;
-/* For each VDDK API define a static global variable. These globals
- * are initialized when the plugin is loaded (by vddk_get_ready).
+/* For each VDDK API define a global variable. These globals are
+ * initialized when the plugin is loaded (by vddk_get_ready).
*/
-#define STUB(fn,ret,args) static ret (*fn) args
-#define OPTIONAL_STUB(fn,ret,args) static ret (*fn) args
+#define STUB(fn,ret,args) ret (*fn) args
+#define OPTIONAL_STUB(fn,ret,args) ret (*fn) args
#include "vddk-stubs.h"
#undef STUB
#undef OPTIONAL_STUB
@@ -78,28 +76,28 @@ NBDKIT_DLL_PUBLIC int vddk_debug_stats;
#define VDDK_MAJOR 6
#define VDDK_MINOR 5
-static void *dl; /* dlopen handle */
-static bool init_called; /* was InitEx called */
-static __thread int error_suppression; /* threadlocal error suppression */
-static int library_version; /* VDDK major: 6, 7, ... */
+void *dl; /* dlopen handle */
+bool init_called; /* was InitEx called */
+__thread int error_suppression; /* threadlocal error suppression */
+int library_version; /* VDDK major: 6, 7, ... */
+bool is_remote; /* true if remote connection */
-static enum { NONE = 0, ZLIB, FASTLZ, SKIPZ } compression; /* compression */
-static char *config; /* config */
-static const char *cookie; /* cookie */
-static const char *filename; /* file */
-char *libdir; /* libdir */
-static uint16_t nfc_host_port; /* nfchostport */
-char *password; /* password */
-static uint16_t port; /* port */
-static const char *server_name; /* server */
-static bool single_link; /* single-link */
-static const char *snapshot_moref; /* snapshot */
-static const char *thumb_print; /* thumbprint */
-static const char *transport_modes; /* transports */
-static bool unbuffered; /* unbuffered */
-static const char *username; /* user */
-static const char *vmx_spec; /* vm */
-static bool is_remote;
+enum compression_type compression; /* compression */
+char *config; /* config */
+const char *cookie; /* cookie */
+const char *filename; /* file */
+char *libdir; /* libdir */
+uint16_t nfc_host_port; /* nfchostport */
+char *password; /* password */
+uint16_t port; /* port */
+const char *server_name; /* server */
+bool single_link; /* single-link */
+const char *snapshot_moref; /* snapshot */
+const char *thumb_print; /* thumbprint */
+const char *transport_modes; /* transports */
+bool unbuffered; /* unbuffered */
+const char *username; /* user */
+const char *vmx_spec; /* vm */
/* For each VDDK API define a variable to store the time taken (used
* to implement -D vddk.stats=1).
@@ -120,45 +118,6 @@ static void display_stats (void);
#undef STUB
#undef OPTIONAL_STUB
-/* Macros to bracket each VDDK API call, for printing debugging
- * information and collecting statistics.
- */
-#define VDDK_CALL_START(fn, fs, ...) \
- do { \
- struct timeval start_t, end_t; \
- /* GCC can optimize this away at compile time: */ \
- const bool datapath = \
- strcmp (#fn, "VixDiskLib_Read") == 0 || \
- strcmp (#fn, "VixDiskLib_Write") == 0; \
- if (vddk_debug_stats) \
- gettimeofday (&start_t, NULL); \
- if (!datapath || vddk_debug_datapath) \
- nbdkit_debug ("VDDK call: %s (" fs ")", #fn, ##__VA_ARGS__); \
- do
-#define VDDK_CALL_END(fn, bytes_) \
- while (0); \
- if (vddk_debug_stats) { \
- gettimeofday (&end_t, NULL); \
- ACQUIRE_LOCK_FOR_CURRENT_SCOPE (&stats_lock); \
- stats_##fn.usecs += tvdiff_usec (&start_t, &end_t); \
- stats_##fn.calls++; \
- stats_##fn.bytes += bytes_; \
- } \
- } while (0)
-
-/* Print VDDK errors. */
-#define VDDK_ERROR(err, fs, ...) \
- do { \
- char *vddk_err_msg; \
- VDDK_CALL_START (VixDiskLib_GetErrorText, "%lu", err) \
- vddk_err_msg = VixDiskLib_GetErrorText ((err), NULL); \
- VDDK_CALL_END (VixDiskLib_GetErrorText, 0); \
- nbdkit_error (fs ": %s", ##__VA_ARGS__, vddk_err_msg); \
- VDDK_CALL_START (VixDiskLib_FreeErrorText, "") \
- VixDiskLib_FreeErrorText (vddk_err_msg); \
- VDDK_CALL_END (VixDiskLib_FreeErrorText, 0); \
- } while (0)
-
/* Unload the plugin. */
static void
vddk_unload (void)
diff --git a/plugins/vddk/vddk.h b/plugins/vddk/vddk.h
index 8c63b4ee..29775eb4 100644
--- a/plugins/vddk/vddk.h
+++ b/plugins/vddk/vddk.h
@@ -1,5 +1,5 @@
/* nbdkit
- * Copyright (C) 2013-2020 Red Hat Inc.
+ * Copyright (C) 2013-2021 Red Hat Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
@@ -33,11 +33,96 @@
#ifndef NBDKIT_VDDK_H
#define NBDKIT_VDDK_H
+#include <stdbool.h>
+#include <stdint.h>
+#include <sys/time.h>
+
+#include <pthread.h>
+
+#include "isaligned.h"
+#include "tvdiff.h"
+#include "vector.h"
+
+#include "vddk-structs.h"
+
+enum compression_type { NONE = 0, ZLIB, FASTLZ, SKIPZ };
+
+extern void *dl;
+extern bool init_called;
+extern __thread int error_suppression;
+extern int library_version;
+extern bool is_remote;
+
+extern enum compression_type compression;
+extern char *config;
+extern const char *cookie;
+extern const char *filename;
extern char *libdir;
+extern uint16_t nfc_host_port;
extern char *password;
+extern uint16_t port;
+extern const char *server_name;
+extern bool single_link;
+extern const char *snapshot_moref;
+extern const char *thumb_print;
+extern const char *transport_modes;
+extern bool unbuffered;
+extern const char *username;
+extern const char *vmx_spec;
+
+extern int vddk_debug_diskinfo;
+extern int vddk_debug_extents;
+extern int vddk_debug_datapath;
+extern int vddk_debug_stats;
+
+#define STUB(fn,ret,args) extern ret (*fn) args
+#define OPTIONAL_STUB(fn,ret,args) extern ret (*fn) args
+#include "vddk-stubs.h"
+#undef STUB
+#undef OPTIONAL_STUB
+
+/* Macros to bracket each VDDK API call, for printing debugging
+ * information and collecting statistics.
+ */
+#define VDDK_CALL_START(fn, fs, ...) \
+ do { \
+ struct timeval start_t, end_t; \
+ /* GCC can optimize this away at compile time: */ \
+ const bool datapath = \
+ strcmp (#fn, "VixDiskLib_Read") == 0 || \
+ strcmp (#fn, "VixDiskLib_Write") == 0; \
+ if (vddk_debug_stats) \
+ gettimeofday (&start_t, NULL); \
+ if (!datapath || vddk_debug_datapath) \
+ nbdkit_debug ("VDDK call: %s (" fs ")", #fn, ##__VA_ARGS__); \
+ do
+#define VDDK_CALL_END(fn, bytes_) \
+ while (0); \
+ if (vddk_debug_stats) { \
+ gettimeofday (&end_t, NULL); \
+ ACQUIRE_LOCK_FOR_CURRENT_SCOPE (&stats_lock); \
+ stats_##fn.usecs += tvdiff_usec (&start_t, &end_t); \
+ stats_##fn.calls++; \
+ stats_##fn.bytes += bytes_; \
+ } \
+ } while (0)
+
+/* Print VDDK errors. */
+#define VDDK_ERROR(err, fs, ...) \
+ do { \
+ char *vddk_err_msg; \
+ VDDK_CALL_START (VixDiskLib_GetErrorText, "%lu", err) \
+ vddk_err_msg = VixDiskLib_GetErrorText ((err), NULL); \
+ VDDK_CALL_END (VixDiskLib_GetErrorText, 0); \
+ nbdkit_error (fs ": %s", ##__VA_ARGS__, vddk_err_msg); \
+ VDDK_CALL_START (VixDiskLib_FreeErrorText, "") \
+ VixDiskLib_FreeErrorText (vddk_err_msg); \
+ VDDK_CALL_END (VixDiskLib_FreeErrorText, 0); \
+ } while (0)
+
+/* reexec.c */
extern bool noreexec;
extern char *reexeced;
-
extern void reexec_if_needed (const char *prepend);
extern int restore_ld_library_path (void);
--
2.31.1

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@ -0,0 +1,287 @@
From 837407bebdf1d746e047d3664156d2ad09784e31 Mon Sep 17 00:00:00 2001
From: "Richard W.M. Jones" <rjones@redhat.com>
Date: Wed, 27 Oct 2021 12:30:41 +0100
Subject: [PATCH] vddk: Refactor -D vddk.stats=1 into a new file
Acked-by: Laszlo Ersek <lersek@redhat.com>
(cherry picked from commit dcd5bc51ed7710c32d956345ea8da14ba15ef8f5)
---
plugins/vddk/Makefile.am | 1 +
plugins/vddk/stats.c | 118 +++++++++++++++++++++++++++++++++++++++
plugins/vddk/vddk.c | 78 +-------------------------
plugins/vddk/vddk.h | 15 +++++
4 files changed, 135 insertions(+), 77 deletions(-)
create mode 100644 plugins/vddk/stats.c
diff --git a/plugins/vddk/Makefile.am b/plugins/vddk/Makefile.am
index 232aaedd..4f470ff9 100644
--- a/plugins/vddk/Makefile.am
+++ b/plugins/vddk/Makefile.am
@@ -46,6 +46,7 @@ nbdkit_vddk_plugin_la_SOURCES = \
vddk.c \
vddk.h \
reexec.c \
+ stats.c \
vddk-structs.h \
vddk-stubs.h \
$(top_srcdir)/include/nbdkit-plugin.h \
diff --git a/plugins/vddk/stats.c b/plugins/vddk/stats.c
new file mode 100644
index 00000000..18a42714
--- /dev/null
+++ b/plugins/vddk/stats.c
@@ -0,0 +1,118 @@
+/* nbdkit
+ * Copyright (C) 2013-2021 Red Hat Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * * Neither the name of Red Hat nor the names of its contributors may be
+ * used to endorse or promote products derived from this software without
+ * specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY RED HAT AND CONTRIBUTORS ''AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL RED HAT OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
+ * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <config.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <inttypes.h>
+
+#include <pthread.h>
+
+#define NBDKIT_API_VERSION 2
+#include <nbdkit-plugin.h>
+
+#include "vector.h"
+
+#include "vddk.h"
+
+/* Debug flags. */
+NBDKIT_DLL_PUBLIC int vddk_debug_stats;
+
+pthread_mutex_t stats_lock = PTHREAD_MUTEX_INITIALIZER;
+
+/* For each VDDK API define a variable to store the time taken (used
+ * to implement -D vddk.stats=1).
+ */
+#define STUB(fn,ret,args) struct vddk_stat stats_##fn = { .name = #fn }
+#define OPTIONAL_STUB(fn,ret,args) STUB(fn,ret,args)
+#include "vddk-stubs.h"
+#undef STUB
+#undef OPTIONAL_STUB
+
+DEFINE_VECTOR_TYPE(statlist, struct vddk_stat)
+
+static int
+stat_compare (const void *vp1, const void *vp2)
+{
+ const struct vddk_stat *st1 = vp1;
+ const struct vddk_stat *st2 = vp2;
+
+ /* Note: sorts in reverse order of time spent in each API call. */
+ if (st1->usecs < st2->usecs) return 1;
+ else if (st1->usecs > st2->usecs) return -1;
+ else return 0;
+}
+
+static const char *
+api_name_without_prefix (const char *name)
+{
+ return strncmp (name, "VixDiskLib_", 11) == 0 ? name + 11 : name;
+}
+
+void
+display_stats (void)
+{
+ statlist stats = empty_vector;
+ size_t i;
+
+ if (!vddk_debug_stats) return;
+
+#define STUB(fn,ret,args) statlist_append (&stats, stats_##fn)
+#define OPTIONAL_STUB(fn,ret,args) statlist_append (&stats, stats_##fn)
+#include "vddk-stubs.h"
+#undef STUB
+#undef OPTIONAL_STUB
+
+ qsort (stats.ptr, stats.size, sizeof stats.ptr[0], stat_compare);
+
+ nbdkit_debug ("VDDK function stats (-D vddk.stats=1):");
+ nbdkit_debug ("%-24s %15s %5s %15s",
+ "VixDiskLib_...", "µs", "calls", "bytes");
+ for (i = 0; i < stats.size; ++i) {
+ if (stats.ptr[i].usecs) {
+ if (stats.ptr[i].bytes > 0)
+ nbdkit_debug (" %-22s %15" PRIi64 " %5" PRIu64 " %15" PRIu64,
+ api_name_without_prefix (stats.ptr[i].name),
+ stats.ptr[i].usecs,
+ stats.ptr[i].calls,
+ stats.ptr[i].bytes);
+ else
+ nbdkit_debug (" %-22s %15" PRIi64 " %5" PRIu64,
+ api_name_without_prefix (stats.ptr[i].name),
+ stats.ptr[i].usecs,
+ stats.ptr[i].calls);
+ }
+ }
+ statlist_reset (&stats);
+}
diff --git a/plugins/vddk/vddk.c b/plugins/vddk/vddk.c
index 0167aa2f..c05dbfcc 100644
--- a/plugins/vddk/vddk.c
+++ b/plugins/vddk/vddk.c
@@ -61,7 +61,6 @@
NBDKIT_DLL_PUBLIC int vddk_debug_diskinfo;
NBDKIT_DLL_PUBLIC int vddk_debug_extents;
NBDKIT_DLL_PUBLIC int vddk_debug_datapath = 1;
-NBDKIT_DLL_PUBLIC int vddk_debug_stats;
/* For each VDDK API define a global variable. These globals are
* initialized when the plugin is loaded (by vddk_get_ready).
@@ -99,25 +98,6 @@ bool unbuffered; /* unbuffered */
const char *username; /* user */
const char *vmx_spec; /* vm */
-/* For each VDDK API define a variable to store the time taken (used
- * to implement -D vddk.stats=1).
- */
-struct vddk_stat {
- const char *name; /* function name */
- int64_t usecs; /* total number of usecs consumed */
- uint64_t calls; /* number of times called */
- uint64_t bytes; /* bytes transferred, datapath calls only */
-};
-static pthread_mutex_t stats_lock = PTHREAD_MUTEX_INITIALIZER;
-static void display_stats (void);
-#define STUB(fn,ret,args) \
- static struct vddk_stat stats_##fn = { .name = #fn }
-#define OPTIONAL_STUB(fn,ret,args) \
- static struct vddk_stat stats_##fn = { .name = #fn }
-#include "vddk-stubs.h"
-#undef STUB
-#undef OPTIONAL_STUB
-
/* Unload the plugin. */
static void
vddk_unload (void)
@@ -130,69 +110,13 @@ vddk_unload (void)
if (dl)
dlclose (dl);
- if (vddk_debug_stats)
- display_stats ();
+ display_stats ();
free (config);
free (libdir);
free (password);
}
-DEFINE_VECTOR_TYPE(statlist, struct vddk_stat)
-
-static int
-stat_compare (const void *vp1, const void *vp2)
-{
- const struct vddk_stat *st1 = vp1;
- const struct vddk_stat *st2 = vp2;
-
- /* Note: sorts in reverse order of time spent in each API call. */
- if (st1->usecs < st2->usecs) return 1;
- else if (st1->usecs > st2->usecs) return -1;
- else return 0;
-}
-
-static const char *
-api_name_without_prefix (const char *name)
-{
- return strncmp (name, "VixDiskLib_", 11) == 0 ? name + 11 : name;
-}
-
-static void
-display_stats (void)
-{
- statlist stats = empty_vector;
- size_t i;
-
-#define STUB(fn,ret,args) statlist_append (&stats, stats_##fn)
-#define OPTIONAL_STUB(fn,ret,args) statlist_append (&stats, stats_##fn)
-#include "vddk-stubs.h"
-#undef STUB
-#undef OPTIONAL_STUB
-
- qsort (stats.ptr, stats.size, sizeof stats.ptr[0], stat_compare);
-
- nbdkit_debug ("VDDK function stats (-D vddk.stats=1):");
- nbdkit_debug ("%-24s %15s %5s %15s",
- "VixDiskLib_...", "µs", "calls", "bytes");
- for (i = 0; i < stats.size; ++i) {
- if (stats.ptr[i].usecs) {
- if (stats.ptr[i].bytes > 0)
- nbdkit_debug (" %-22s %15" PRIi64 " %5" PRIu64 " %15" PRIu64,
- api_name_without_prefix (stats.ptr[i].name),
- stats.ptr[i].usecs,
- stats.ptr[i].calls,
- stats.ptr[i].bytes);
- else
- nbdkit_debug (" %-22s %15" PRIi64 " %5" PRIu64,
- api_name_without_prefix (stats.ptr[i].name),
- stats.ptr[i].usecs,
- stats.ptr[i].calls);
- }
- }
- statlist_reset (&stats);
-}
-
static void
trim (char *str)
{
diff --git a/plugins/vddk/vddk.h b/plugins/vddk/vddk.h
index 29775eb4..1400589d 100644
--- a/plugins/vddk/vddk.h
+++ b/plugins/vddk/vddk.h
@@ -126,4 +126,19 @@ extern char *reexeced;
extern void reexec_if_needed (const char *prepend);
extern int restore_ld_library_path (void);
+/* stats.c */
+struct vddk_stat {
+ const char *name; /* function name */
+ int64_t usecs; /* total number of usecs consumed */
+ uint64_t calls; /* number of times called */
+ uint64_t bytes; /* bytes transferred, datapath calls only */
+};
+extern pthread_mutex_t stats_lock;
+#define STUB(fn,ret,args) extern struct vddk_stat stats_##fn;
+#define OPTIONAL_STUB(fn,ret,args) STUB(fn,ret,args)
+#include "vddk-stubs.h"
+#undef STUB
+#undef OPTIONAL_STUB
+extern void display_stats (void);
+
#endif /* NBDKIT_VDDK_H */
--
2.31.1

1287
0017-vddk-Implement-parallel-thread-model.patch Normal file
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File diff suppressed because it is too large Load Diff

26
nbdkit.spec
View File

@ -44,13 +44,13 @@ ExclusiveArch: x86_64
%global verify_tarball_signature 1
# If there are patches which touch autotools files, set this to 1.
%global patches_touch_autotools %{nil}
%global patches_touch_autotools 1
# The source directory.
%global source_directory 1.28-stable
Name: nbdkit
Version: 1.28.0
Version: 1.28.1
Release: 1%{?dist}
Summary: NBD server
@ -76,7 +76,23 @@ Source3: copy-patches.sh
# https://gitlab.com/nbdkit/nbdkit/-/commits/rhel-9.0/
# Patches.
# (no patches)
Patch0001: 0001-vddk-Refactor-how-D-vddk.stats-1-is-collected.patch
Patch0002: 0002-vddk-Extend-D-vddk.stats-1-to-show-number-of-calls-a.patch
Patch0003: 0003-vddk-Simplify-and-consolidate-VDDK_CALL_START-END-ma.patch
Patch0004: 0004-vddk-Document-troubleshooting-performance-problems.patch
Patch0005: 0005-vddk-Include-VDDK-major-library-version-in-dump-plug.patch
Patch0006: 0006-vddk-Add-logical-and-physical-sector-size-to-D-vddk..patch
Patch0007: 0007-vddk-Fix-typo-in-debug-message.patch
Patch0008: 0008-vddk-Only-print-vddk_library_version-when-we-managed.patch
Patch0009: 0009-vddk-Print-one-line-in-dump-plugin-output-for-each-V.patch
Patch0010: 0010-vddk-Update-comment-about-VixDiskLib_PrepareForAcces.patch
Patch0011: 0011-vddk-Document-what-I-found-about-VixDiskLib_Flush.patch
Patch0012: 0012-vddk-Note-that-we-have-tested-VDDK-7.0.3.patch
Patch0013: 0013-vddk-Move-minimum-version-to-VDDK-6.5.patch
Patch0014: 0014-vddk-Add-read-write-and-wait-asynchronous-functions.patch
Patch0015: 0015-vddk-Start-to-split-VDDK-over-several-files.patch
Patch0016: 0016-vddk-Refactor-D-vddk.stats-1-into-a-new-file.patch
Patch0017: 0017-vddk-Implement-parallel-thread-model.patch
BuildRequires: make
%if 0%{patches_touch_autotools}
@ -1247,6 +1263,10 @@ export LIBGUESTFS_TRACE=1
%changelog
* Fri Oct 29 2021 Richard W.M. Jones <rjones@redhat.com> - 1.28.1-1
- Add asynchronous support in nbdkit-vddk-plugin
resolves: rhbz#2018463, rhbz#2011709
* Fri Oct 08 2021 Richard W.M. Jones <rjones@redhat.com> - 1.28.0-1
- Rebase to new stable branch version 1.28.0
resolves: rhbz#2011709

4
sources
View File

@ -1,2 +1,2 @@
SHA512 (nbdkit-1.28.0.tar.gz) = 904b69847fc7fc3c3a394391657f52794e9a0d6d2a96df748ae74c6657ca07de33dd99b83888410d240031451927ead3a4776d0bdd433c2bf1e2acd36c3c8403
SHA512 (nbdkit-1.28.0.tar.gz.sig) = 2b6d5c3c54766e1401d5c0b9192c46cf413aa586f0f33fed909c2056ca205a2bd8bb1a73077054d594ad9a963b6a07364f1e60e067437c0d333c4a0b202ebfb1
SHA512 (nbdkit-1.28.1.tar.gz) = 058b50b6674cb6af0ca24b200919423852eacdf80d04913f2d2680575292078644b39c8bdf2f9f3c7fa31f4aefbcc31f3c736d3e9fc4753e74e6701321bc4cab
SHA512 (nbdkit-1.28.1.tar.gz.sig) = b69409503dd3b40e1f160ec98b599207158b42549fae4be9f1db79d512633b34b41e7229249a4c6d09b2b9bee38d57c232e78564fc43d0d6e37fd786c3ddda0d