Starting from this patch to enable traces use -trace option of qemu or
-T, --trace option of qemu-img, qemu-io and qemu-nbd. For qemu traces
also can be managed by qmp commands trace-event-{get,set}-state.
Recompilation with CFLAGS=-DDEBUG_NBD is no more needed, furthermore,
DEBUG_NBD macro is removed from the code.
Signed-off-by: Vladimir Sementsov-Ogievskiy <address@hidden>
---
Makefile.objs | 1 +
nbd/client.c | 74 +++++++++++++++++++++---------------------------
nbd/nbd-internal.h | 19 -------------
nbd/server.c | 83 ++++++++++++++++++++++++++----------------------------
nbd/trace-events | 68 ++++++++++++++++++++++++++++++++++++++++++++
5 files changed, 141 insertions(+), 104 deletions(-)
create mode 100644 nbd/trace-events
diff --git a/Makefile.objs b/Makefile.objs
index b2e6322ef0..a66ea34cc4 100644
--- a/Makefile.objs
+++ b/Makefile.objs
@@ -168,6 +168,7 @@ trace-events-subdirs += linux-user
trace-events-subdirs += qapi
trace-events-subdirs += accel/tcg
trace-events-subdirs += accel/kvm
+trace-events-subdirs += nbd
trace-events-files = $(SRC_PATH)/trace-events $(trace-events-subdirs:%=$(SRC_PATH)/%/trace-events)
diff --git a/nbd/client.c b/nbd/client.c
index 5a4825ebe0..75b28f4ccf 100644
--- a/nbd/client.c
+++ b/nbd/client.c
@@ -19,6 +19,7 @@
#include "qemu/osdep.h"
#include "qapi/error.h"
+#include "trace.h"
#include "nbd-internal.h"
static int nbd_errno_to_system_errno(int err)
@@ -44,7 +45,7 @@ static int nbd_errno_to_system_errno(int err)
ret = ESHUTDOWN;
break;
default:
- TRACE("Squashing unexpected error %d to EINVAL", err);
+ trace_nbd_unknown_error(err);
/* fallthrough */
case NBD_EINVAL:
ret = EINVAL;
@@ -103,7 +104,7 @@ static int nbd_send_option_request(QIOChannel *ioc,
uint32_t opt,
if (len == -1) {
req.length = len = strlen(data);
}
- TRACE("Sending option request %" PRIu32", len %" PRIu32, opt, len);
+ trace_nbd_send_option_request(opt, len);
stq_be_p(&req.magic, NBD_OPTS_MAGIC);
stl_be_p(&req.option, opt);
@@ -153,8 +154,7 @@ static int nbd_receive_option_reply(QIOChannel *ioc,
uint32_t opt,
be32_to_cpus(&reply->type);
be32_to_cpus(&reply->length);
- TRACE("Received option reply %" PRIx32", type %" PRIx32", len %" PRIu32,
- reply->option, reply->type, reply->length);
+ trace_nbd_receive_option_reply(reply->option, reply->type, reply->length);
if (reply->magic != NBD_REP_MAGIC) {
error_setg(errp, "Unexpected option reply magic");
@@ -201,8 +201,7 @@ static int nbd_handle_reply_err(QIOChannel *ioc,
nbd_opt_reply *reply,
switch (reply->type) {
case NBD_REP_ERR_UNSUP:
- TRACE("server doesn't understand request %" PRIx32
- ", attempting fallback", reply->option);
+ trace_nbd_reply_err_unsup(reply->option);
result = 0;
goto cleanup;
@@ -342,12 +341,12 @@ static int nbd_receive_query_exports(QIOChannel *ioc,
{
bool foundExport = false;
- TRACE("Querying export list for '%s'", wantname);
+ trace_nbd_receive_query_exports_start(wantname);
if (nbd_send_option_request(ioc, NBD_OPT_LIST, 0, NULL, errp) < 0) {
return -1;
}
- TRACE("Reading available export names");
+ trace_nbd_receive_query_exports_loop();
while (1) {
int ret = nbd_receive_list(ioc, wantname, &foundExport, errp);
@@ -362,7 +361,7 @@ static int nbd_receive_query_exports(QIOChannel *ioc,
nbd_send_opt_abort(ioc);
return -1;
}
- TRACE("Found desired export name '%s'", wantname);
+ trace_nbd_receive_query_exports_success(wantname);
return 0;
}
}
@@ -376,12 +375,12 @@ static QIOChannel *nbd_receive_starttls(QIOChannel *ioc,
QIOChannelTLS *tioc;
struct NBDTLSHandshakeData data = { 0 };
- TRACE("Requesting TLS from server");
+ trace_nbd_receive_starttls_request();
if (nbd_send_option_request(ioc, NBD_OPT_STARTTLS, 0, NULL, errp) < 0) {
return NULL;
}
- TRACE("Getting TLS reply from server");
+ trace_nbd_receive_starttls_reply();
if (nbd_receive_option_reply(ioc, NBD_OPT_STARTTLS, &reply, errp) < 0) {
return NULL;
}
@@ -400,14 +399,14 @@ static QIOChannel *nbd_receive_starttls(QIOChannel *ioc,
return NULL;
}
- TRACE("TLS request approved, setting up TLS");
+ trace_nbd_receive_starttls_new_client();
tioc = qio_channel_tls_new_client(ioc, tlscreds, hostname, errp);
if (!tioc) {
return NULL;
}
qio_channel_set_name(QIO_CHANNEL(tioc), "nbd-client-tls");
data.loop = g_main_loop_new(g_main_context_default(), FALSE);
- TRACE("Starting TLS handshake");
+ trace_nbd_receive_starttls_tls_handshake();
qio_channel_tls_handshake(tioc,
nbd_tls_handshake,
&data,
@@ -436,8 +435,7 @@ int nbd_receive_negotiate(QIOChannel *ioc, const char
*name, uint16_t *flags,
int rc;
bool zeroes = true;
- TRACE("Receiving negotiation tlscreds=%p hostname=%s.",
- tlscreds, hostname ? hostname : "<null>");
+ trace_nbd_receive_negotiate(tlscreds, hostname ? hostname : "<null>");
rc = -EINVAL;
@@ -462,7 +460,7 @@ int nbd_receive_negotiate(QIOChannel *ioc, const char *name, uint16_t *flags,
memcpy(&nbd_magic, buf, 8);
nbd_magic = be64_to_cpu(nbd_magic);
- TRACE("Magic is 0x%" PRIx64, nbd_magic);
+ trace_nbd_receive_negotiate_magic(nbd_magic);
if (memcmp(buf, "NBDMAGIC", 8) != 0) {
error_setg(errp, "Invalid magic received");
@@ -474,7 +472,7 @@ int nbd_receive_negotiate(QIOChannel *ioc, const char
*name, uint16_t *flags,
goto fail;
}
magic = be64_to_cpu(magic);
- TRACE("Magic is 0x%" PRIx64, magic);
+ trace_nbd_receive_negotiate_magic2(magic);
if (magic == NBD_OPTS_MAGIC) {
uint32_t clientflags = 0;
@@ -486,15 +484,13 @@ int nbd_receive_negotiate(QIOChannel *ioc, const char
*name, uint16_t *flags,
goto fail;
}
globalflags = be16_to_cpu(globalflags);
- TRACE("Global flags are %" PRIx32, globalflags);
+ trace_nbd_receive_negotiate_server_flags(globalflags);
if (globalflags & NBD_FLAG_FIXED_NEWSTYLE) {
fixedNewStyle = true;
- TRACE("Server supports fixed new style");
clientflags |= NBD_FLAG_C_FIXED_NEWSTYLE;
}
if (globalflags & NBD_FLAG_NO_ZEROES) {
zeroes = false;
- TRACE("Server supports no zeroes");
clientflags |= NBD_FLAG_C_NO_ZEROES;
}
/* client requested flags */
@@ -516,7 +512,7 @@ int nbd_receive_negotiate(QIOChannel *ioc, const char
*name, uint16_t *flags,
}
}
if (!name) {
- TRACE("Using default NBD export name \"\"");
+ trace_nbd_receive_negotiate_default_name();
name = "";
}
if (fixedNewStyle) {
@@ -565,7 +561,7 @@ int nbd_receive_negotiate(QIOChannel *ioc, const char
*name, uint16_t *flags,
goto fail;
}
*size = be64_to_cpu(s);
- TRACE("Size is %" PRIu64, *size);
+ trace_nbd_receive_negotiate_export_size(*size);
if (nbd_read(ioc, &oldflags, sizeof(oldflags), errp) < 0) {
error_prepend(errp, "Failed to read export flags");
@@ -582,7 +578,7 @@ int nbd_receive_negotiate(QIOChannel *ioc, const char
*name, uint16_t *flags,
goto fail;
}
- TRACE("Size is %" PRIu64 ", export flags %" PRIx16, *size, *flags);
+ trace_nbd_receive_negotiate_size_flags(*size, *flags);
if (zeroes && nbd_drop(ioc, 124, errp) < 0) {
error_prepend(errp, "Failed to read reserved block");
goto fail;
@@ -604,7 +600,7 @@ int nbd_init(int fd, QIOChannelSocket *sioc, uint16_t
flags, off_t size,
return -E2BIG;
}
- TRACE("Setting NBD socket");
+ trace_nbd_init_set_socket();
if (ioctl(fd, NBD_SET_SOCK, (unsigned long) sioc->fd) < 0) {
int serrno = errno;
@@ -612,7 +608,7 @@ int nbd_init(int fd, QIOChannelSocket *sioc, uint16_t
flags, off_t size,
return -serrno;
}
- TRACE("Setting block size to %lu", (unsigned long)BDRV_SECTOR_SIZE);
+ trace_nbd_init_set_block_size(BDRV_SECTOR_SIZE);
if (ioctl(fd, NBD_SET_BLKSIZE, (unsigned long)BDRV_SECTOR_SIZE) < 0) {
int serrno = errno;
@@ -620,10 +616,9 @@ int nbd_init(int fd, QIOChannelSocket *sioc, uint16_t
flags, off_t size,
return -serrno;
}
- TRACE("Setting size to %lu block(s)", sectors);
+ trace_nbd_init_set_size(sectors);
if (size % BDRV_SECTOR_SIZE) {
- TRACE("Ignoring trailing %d bytes of export",
- (int) (size % BDRV_SECTOR_SIZE));
+ trace_nbd_init_trailing_bytes(size % BDRV_SECTOR_SIZE);
}
if (ioctl(fd, NBD_SET_SIZE_BLOCKS, sectors) < 0) {
@@ -635,7 +630,7 @@ int nbd_init(int fd, QIOChannelSocket *sioc, uint16_t
flags, off_t size,
if (ioctl(fd, NBD_SET_FLAGS, (unsigned long) flags) < 0) {
if (errno == ENOTTY) {
int read_only = (flags & NBD_FLAG_READ_ONLY) != 0;
- TRACE("Setting readonly attribute");
+ trace_nbd_init_set_readonly();
if (ioctl(fd, BLKROSET, (unsigned long) &read_only) < 0) {
int serrno = errno;
@@ -649,7 +644,7 @@ int nbd_init(int fd, QIOChannelSocket *sioc, uint16_t
flags, off_t size,
}
}
- TRACE("Negotiation ended");
+ trace_nbd_init_finish();
return 0;
}
@@ -659,7 +654,7 @@ int nbd_client(int fd)
int ret;
int serrno;
- TRACE("Doing NBD loop");
+ trace_nbd_client_loop();
ret = ioctl(fd, NBD_DO_IT);
if (ret < 0 && errno == EPIPE) {
@@ -671,12 +666,12 @@ int nbd_client(int fd)
}
serrno = errno;
- TRACE("NBD loop returned %d: %s", ret, strerror(serrno));
+ trace_nbd_client_loop_ret(ret, strerror(serrno));
- TRACE("Clearing NBD queue");
+ trace_nbd_client_clear_queue();
ioctl(fd, NBD_CLEAR_QUE);
- TRACE("Clearing NBD socket");
+ trace_nbd_client_clear_socket();
ioctl(fd, NBD_CLEAR_SOCK);
errno = serrno;
@@ -713,11 +708,8 @@ ssize_t nbd_send_request(QIOChannel *ioc, NBDRequest
*request)
{
uint8_t buf[NBD_REQUEST_SIZE];
- TRACE("Sending request to server: "
- "{ .from = %" PRIu64", .len = %" PRIu32 ", .handle = %" PRIu64
- ", .flags = %" PRIx16 ", .type = %" PRIu16 " }",
- request->from, request->len, request->handle,
- request->flags, request->type);
+ trace_nbd_send_request(request->from, request->len, request->handle,
+ request->flags, request->type);
stl_be_p(buf, NBD_REQUEST_MAGIC);
stw_be_p(buf + 4, request->flags);
@@ -762,9 +754,7 @@ ssize_t nbd_receive_reply(QIOChannel *ioc, NBDReply *reply,
Error **errp)
error_setg(errp, "server shutting down");
return -EINVAL;
}
- TRACE("Got reply: { magic = 0x%" PRIx32 ", .error = % " PRId32
- ", handle = %" PRIu64" }",
- magic, reply->error, reply->handle);
+ trace_nbd_receive_reply(magic, reply->error, reply->handle);
if (magic != NBD_REPLY_MAGIC) {
error_setg(errp, "invalid magic (got 0x%" PRIx32 ")", magic);
diff --git a/nbd/nbd-internal.h b/nbd/nbd-internal.h
index 39bfed177c..cf6ecbf358 100644
--- a/nbd/nbd-internal.h
+++ b/nbd/nbd-internal.h
@@ -31,25 +31,6 @@
#include "qemu/queue.h"
#include "qemu/main-loop.h"
-/* #define DEBUG_NBD */
-
-#ifdef DEBUG_NBD
-#define DEBUG_NBD_PRINT 1
-#else
-#define DEBUG_NBD_PRINT 0
-#endif
-
-#define TRACE(msg, ...) do { \
- if (DEBUG_NBD_PRINT) { \
- LOG(msg, ## __VA_ARGS__); \
- } \
-} while (0)
-
-#define LOG(msg, ...) do { \
- fprintf(stderr, "%s:%s():L%d: " msg "\n", \
- __FILE__, __FUNCTION__, __LINE__, ## __VA_ARGS__); \
-} while (0)
-
/* This is all part of the "official" NBD API.
*
* The most up-to-date documentation is available at:
diff --git a/nbd/server.c b/nbd/server.c
index 0671ebc50a..52ed9625fd 100644
--- a/nbd/server.c
+++ b/nbd/server.c
@@ -19,6 +19,7 @@
#include "qemu/osdep.h"
#include "qapi/error.h"
+#include "trace.h"
#include "nbd-internal.h"
static int system_errno_to_nbd_errno(int err)
@@ -138,8 +139,7 @@ static int nbd_negotiate_send_rep_len(QIOChannel *ioc,
uint32_t type,
{
uint64_t magic;
- TRACE("Reply opt=%" PRIx32 " type=%" PRIx32 " len=%" PRIu32,
- type, opt, len);
+ trace_nbd_negotiate_send_rep_len(type, opt, len);
magic = cpu_to_be64(NBD_REP_MAGIC);
if (nbd_write(ioc, &magic, sizeof(magic), errp) < 0) {
@@ -191,7 +191,7 @@ nbd_negotiate_send_rep_err(QIOChannel *ioc, uint32_t type,
va_end(va);
len = strlen(msg);
assert(len < 4096);
- TRACE("sending error message \"%s\"", msg);
+ trace_nbd_negotiate_send_rep_err(msg);
ret = nbd_negotiate_send_rep_len(ioc, type, opt, len, errp);
if (ret < 0) {
goto out;
@@ -219,7 +219,7 @@ static int nbd_negotiate_send_rep_list(QIOChannel *ioc,
NBDExport *exp,
const char *desc = exp->description ? exp->description : "";
int ret;
- TRACE("Advertising export name '%s' description '%s'", name, desc);
+ trace_nbd_negotiate_send_rep_list(name, desc);
name_len = strlen(name);
desc_len = strlen(desc);
len = name_len + desc_len + sizeof(len);
@@ -283,7 +283,7 @@ static int nbd_negotiate_handle_export_name(NBDClient
*client, uint32_t length,
/* Client sends:
[20 .. xx] export name (length bytes)
*/
- TRACE("Checking length");
+ trace_nbd_negotiate_handle_export_name();
if (length >= sizeof(name)) {
error_setg(errp, "Bad length received");
return -EINVAL;
@@ -294,7 +294,7 @@ static int nbd_negotiate_handle_export_name(NBDClient
*client, uint32_t length,
}
name[length] = '\0';
- TRACE("Client requested export '%s'", name);
+ trace_nbd_negotiate_handle_export_name_request(name);
client->exp = nbd_export_find(name);
if (!client->exp) {
@@ -318,7 +318,7 @@ static QIOChannel *nbd_negotiate_handle_starttls(NBDClient
*client,
QIOChannelTLS *tioc;
struct NBDTLSHandshakeData data = { 0 };
- TRACE("Setting up TLS");
+ trace_nbd_negotiate_handle_starttls();
ioc = client->ioc;
if (length) {
if (nbd_drop(ioc, length, errp) < 0) {
@@ -344,7 +344,7 @@ static QIOChannel *nbd_negotiate_handle_starttls(NBDClient
*client,
}
qio_channel_set_name(QIO_CHANNEL(tioc), "nbd-server-tls");
- TRACE("Starting TLS handshake");
+ trace_nbd_negotiate_handle_starttls_handshake();
data.loop = g_main_loop_new(g_main_context_default(), FALSE);
qio_channel_tls_handshake(tioc,
nbd_tls_handshake,
@@ -396,15 +396,15 @@ static int nbd_negotiate_options(NBDClient *client, Error
**errp)
error_prepend(errp, "read failed: ");
return -EIO;
}
- TRACE("Checking client flags");
+ trace_nbd_negotiate_options_flags();
be32_to_cpus(&flags);
if (flags & NBD_FLAG_C_FIXED_NEWSTYLE) {
- TRACE("Client supports fixed newstyle handshake");
+ trace_nbd_negotiate_options_newstyle();
fixedNewstyle = true;
flags &= ~NBD_FLAG_C_FIXED_NEWSTYLE;
}
if (flags & NBD_FLAG_C_NO_ZEROES) {
- TRACE("Client supports no zeroes at handshake end");
+ trace_nbd_negotiate_options_no_zeroes();
client->no_zeroes = true;
flags &= ~NBD_FLAG_C_NO_ZEROES;
}
@@ -422,7 +422,7 @@ static int nbd_negotiate_options(NBDClient *client, Error
**errp)
error_prepend(errp, "read failed: ");
return -EINVAL;
}
- TRACE("Checking opts magic");
+ trace_nbd_negotiate_options_check_magic();
if (magic != be64_to_cpu(NBD_OPTS_MAGIC)) {
error_setg(errp, "Bad magic received");
return -EINVAL;
@@ -441,7 +441,7 @@ static int nbd_negotiate_options(NBDClient *client, Error
**errp)
}
length = be32_to_cpu(length);
- TRACE("Checking option 0x%" PRIx32, clientflags);
+ trace_nbd_negotiate_options_check_option(clientflags);
if (client->tlscreds &&
client->ioc == (QIOChannel *)client->sioc) {
QIOChannel *tioc;
@@ -501,8 +501,8 @@ static int nbd_negotiate_options(NBDClient *client, Error
**errp)
&local_err);
if (local_err != NULL) {
- TRACE("Reply to NBD_OPT_ABORT request failed: %s",
- error_get_pretty(local_err));
+ const char *error = error_get_pretty(local_err);
+ trace_nbd_opt_abort_reply_failed(error);
error_free(local_err);
}
@@ -599,14 +599,14 @@ static coroutine_fn int nbd_negotiate(NBDClient *client, Error **errp)
qio_channel_set_blocking(client->ioc, false, NULL);
- TRACE("Beginning negotiation.");
+ trace_nbd_negotiate_begin();
memset(buf, 0, sizeof(buf));
memcpy(buf, "NBDMAGIC", 8);
oldStyle = client->exp != NULL && !client->tlscreds;
if (oldStyle) {
- TRACE("advertising size %" PRIu64 " and flags %x",
- client->exp->size, client->exp->nbdflags | myflags);
+ trace_nbd_negotiate_old_style(client->exp->size,
+ client->exp->nbdflags | myflags);
stq_be_p(buf + 8, NBD_CLIENT_MAGIC);
stq_be_p(buf + 16, client->exp->size);
stw_be_p(buf + 26, client->exp->nbdflags | myflags);
@@ -637,8 +637,8 @@ static coroutine_fn int nbd_negotiate(NBDClient *client,
Error **errp)
return ret;
}
- TRACE("advertising size %" PRIu64 " and flags %x",
- client->exp->size, client->exp->nbdflags | myflags);
+ trace_nbd_negotiate_new_style_size_flags(
+ client->exp->size, client->exp->nbdflags | myflags);
stq_be_p(buf + 18, client->exp->size);
stw_be_p(buf + 26, client->exp->nbdflags | myflags);
len = client->no_zeroes ? 10 : sizeof(buf) - 18;
@@ -649,7 +649,7 @@ static coroutine_fn int nbd_negotiate(NBDClient *client,
Error **errp)
}
}
- TRACE("Negotiation succeeded.");
+ trace_nbd_negotiate_success();
return 0;
}
@@ -682,9 +682,8 @@ static int nbd_receive_request(QIOChannel *ioc, NBDRequest
*request,
request->from = ldq_be_p(buf + 16);
request->len = ldl_be_p(buf + 24);
- TRACE("Got request: { magic = 0x%" PRIx32 ", .flags = %" PRIx16
- ", .type = %" PRIx16 ", from = %" PRIu64 ", len = %" PRIu32 " }",
- magic, request->flags, request->type, request->from, request->len);
+ trace_nbd_receive_request(magic, request->flags, request->type,
+ request->from, request->len);
if (magic != NBD_REQUEST_MAGIC) {
error_setg(errp, "invalid magic (got 0x%" PRIx32 ")", magic);
@@ -699,9 +698,7 @@ static int nbd_send_reply(QIOChannel *ioc, NBDReply *reply,
Error **errp)
reply->error = system_errno_to_nbd_errno(reply->error);
- TRACE("Sending response to client: { .error = %" PRId32
- ", handle = %" PRIu64 " }",
- reply->error, reply->handle);
+ trace_nbd_send_reply(reply->error, reply->handle);
/* Reply
[ 0 .. 3] magic (NBD_REPLY_MAGIC)
@@ -798,7 +795,7 @@ static void blk_aio_attached(AioContext *ctx, void *opaque)
NBDExport *exp = opaque;
NBDClient *client;
- TRACE("Export %s: Attaching clients to AIO context %p\n", exp->name, ctx);
+ trace_blk_aio_attached(exp->name, ctx);
exp->ctx = ctx;
@@ -818,7 +815,7 @@ static void blk_aio_detach(void *opaque)
NBDExport *exp = opaque;
NBDClient *client;
- TRACE("Export %s: Detaching clients from AIO context %p\n", exp->name, exp->ctx);
+ trace_blk_aio_detach(exp->name, exp->ctx);
QTAILQ_FOREACH(client, &exp->clients, next) {
qio_channel_detach_aio_context(client->ioc);
@@ -1045,7 +1042,7 @@ static int nbd_co_receive_request(NBDRequestData *req,
NBDRequest *request,
return -EIO;
}
- TRACE("Decoding type");
+ trace_nbd_co_receive_request_decode_type();
if (request->type != NBD_CMD_WRITE) {
/* No payload, we are ready to read the next request. */
@@ -1055,7 +1052,7 @@ static int nbd_co_receive_request(NBDRequestData *req,
NBDRequest *request,
if (request->type == NBD_CMD_DISC) {
/* Special case: we're going to disconnect without a reply,
* whether or not flags, from, or len are bogus */
- TRACE("Request type is DISCONNECT");
+ trace_nbd_co_receive_request_disconnect();
return -EIO;
}
@@ -1082,7 +1079,7 @@ static int nbd_co_receive_request(NBDRequestData *req, NBDRequest *request,
}
}
if (request->type == NBD_CMD_WRITE) {
- TRACE("Reading %" PRIu32 " byte(s)", request->len);
+ trace_nbd_co_receive_request_cmd_write(request->len);
if (nbd_read(client->ioc, req->data, request->len, errp) < 0) {
error_prepend(errp, "reading from socket failed: ");
@@ -1124,7 +1121,7 @@ static coroutine_fn void nbd_trip(void *opaque)
int reply_data_len = 0;
Error *local_err = NULL;
- TRACE("Reading request.");
+ trace_do_nbd_trip();
if (client->closing) {
nbd_client_put(client);
return;
@@ -1156,7 +1153,7 @@ static coroutine_fn void nbd_trip(void *opaque)
switch (request.type) {
case NBD_CMD_READ:
- TRACE("Request type is READ");
+ trace_do_nbd_trip_cmd_read();
/* XXX: NBD Protocol only documents use of FUA with WRITE */
if (request.flags & NBD_CMD_FLAG_FUA) {
@@ -1177,19 +1174,19 @@ static coroutine_fn void nbd_trip(void *opaque)
}
reply_data_len = request.len;
- TRACE("Read %" PRIu32" byte(s)", request.len);
+ trace_do_nbd_trip_read(request.len);
break;
case NBD_CMD_WRITE:
- TRACE("Request type is WRITE");
+ trace_do_nbd_trip_cmd_write();
if (exp->nbdflags & NBD_FLAG_READ_ONLY) {
- TRACE("Server is read-only, return error");
+ trace_do_nbd_trip_cmd_write_readonly();
reply.error = EROFS;
break;
}
- TRACE("Writing to device");
+ trace_do_nbd_trip_write();
flags = 0;
if (request.flags & NBD_CMD_FLAG_FUA) {
@@ -1204,7 +1201,7 @@ static coroutine_fn void nbd_trip(void *opaque)
break;
case NBD_CMD_WRITE_ZEROES:
- TRACE("Request type is WRITE_ZEROES");
+ trace_do_nbd_trip_cmd_write_zeroes();
if (exp->nbdflags & NBD_FLAG_READ_ONLY) {
error_setg(&local_err, "Server is read-only, return error");
@@ -1212,7 +1209,7 @@ static coroutine_fn void nbd_trip(void *opaque)
break;
}
- TRACE("Writing to device");
+ trace_do_nbd_trip_write_zeroes();
flags = 0;
if (request.flags & NBD_CMD_FLAG_FUA) {
@@ -1234,7 +1231,7 @@ static coroutine_fn void nbd_trip(void *opaque)
abort();
case NBD_CMD_FLUSH:
- TRACE("Request type is FLUSH");
+ trace_do_nbd_trip_cmd_flush();
ret = blk_co_flush(exp->blk);
if (ret < 0) {
@@ -1244,7 +1241,7 @@ static coroutine_fn void nbd_trip(void *opaque)
break;
case NBD_CMD_TRIM:
- TRACE("Request type is TRIM");
+ trace_do_nbd_trip_cmd_trim();
ret = blk_co_pdiscard(exp->blk, request.from + exp->dev_offset,
request.len);
if (ret < 0) {
@@ -1280,7 +1277,7 @@ reply:
goto disconnect;
}
- TRACE("Request/Reply complete");
+ trace_do_nbd_trip_complete();
done:
nbd_request_put(req);
diff --git a/nbd/trace-events b/nbd/trace-events
new file mode 100644
index 0000000000..46e4d110bd
--- /dev/null
+++ b/nbd/trace-events
@@ -0,0 +1,68 @@
+# nbd/client.c
+nbd_unknown_error(int err) "Squashing unexpected error %d to EINVAL"
+nbd_send_option_request(uint32_t opt, uint32_t len) "Sending option request %"
PRIu32", len %" PRIu32
+nbd_receive_option_reply(uint32_t option, uint32_t type, uint32_t length) "Received option reply
%" PRIx32", type %" PRIx32", len %" PRIu32
+nbd_reply_err_unsup(uint32_t option) "server doesn't understand request %" PRIx32
", attempting fallback"
+nbd_receive_query_exports_start(const char *wantname) "Querying export list for
'%s'"
+nbd_receive_query_exports_loop(void) "Reading available export names"
+nbd_receive_query_exports_success(const char *wantname) "Found desired export name
'%s'"
+nbd_receive_starttls_request(void) "Requesting TLS from server"
+nbd_receive_starttls_reply(void) "Getting TLS reply from server"
+nbd_receive_starttls_new_client(void) "TLS request approved, setting up TLS"
+nbd_receive_starttls_tls_handshake(void) "Starting TLS handshake"
+nbd_receive_negotiate(void *tlscreds, const char *hostname) "Receiving negotiation
tlscreds=%p hostname=%s"
+nbd_receive_negotiate_magic(uint64_t magic) "Magic is 0x%" PRIx64
+nbd_receive_negotiate_magic2(uint64_t magic) "Magic is 0x%" PRIx64
+nbd_receive_negotiate_server_flags(uint32_t globalflags) "Global flags are %"
PRIx32
+nbd_receive_negotiate_default_name(void) "Using default NBD export name \"\""
+nbd_receive_negotiate_export_size(uint64_t size) "Size is %" PRIu64
+nbd_receive_negotiate_size_flags(uint64_t size, uint16_t flags) "Size is %" PRIu64
", export flags %" PRIx16
+nbd_init_set_socket(void) "Setting NBD socket"
+nbd_init_set_block_size(unsigned long block_size) "Setting block size to %lu"
+nbd_init_set_size(unsigned long sectors) "Setting size to %lu block(s)"
+nbd_init_trailing_bytes(int ignored_bytes) "Ignoring trailing %d bytes of
export"
+nbd_init_set_readonly(void) "Setting readonly attribute"
+nbd_init_finish(void) "Negotiation ended"
+nbd_client_loop(void) "Doing NBD loop"
+nbd_client_loop_ret(int ret, const char *error) "NBD loop returned %d: %s"
+nbd_client_clear_queue(void) "Clearing NBD queue"
+nbd_client_clear_socket(void) "Clearing NBD socket"
+nbd_send_request(uint64_t from, uint32_t len, uint64_t handle, uint16_t flags, uint16_t type) "Sending request to server: { .from =
%" PRIu64", .len = %" PRIu32 ", .handle = %" PRIu64 ", .flags = %" PRIx16 ", .type = %" PRIu16
" }"
+nbd_receive_reply(uint32_t magic, int32_t error, uint64_t handle) "Got reply: { magic = 0x%" PRIx32 ",
.error = % " PRId32 ", handle = %" PRIu64" }"
+
+# nbd/server.c
+nbd_negotiate_send_rep_len(uint32_t type, uint32_t opt, uint32_t len) "Reply opt=%" PRIx32 "
type=%" PRIx32 " len=%" PRIu32
+nbd_negotiate_send_rep_err(const char *msg) "sending error message \"%s\""
+nbd_negotiate_send_rep_list(const char *name, const char *desc) "Advertising export
name '%s' description '%s'"
+nbd_negotiate_handle_export_name(void) "Checking length"
+nbd_negotiate_handle_export_name_request(const char *name) "Client requested export
'%s'"
+nbd_negotiate_handle_starttls(void) "Setting up TLS"
+nbd_negotiate_handle_starttls_handshake(void) "Starting TLS handshake"
+nbd_negotiate_options_flags(void) "Checking client flags"
+nbd_negotiate_options_newstyle(void) "Client supports fixed newstyle handshake"
+nbd_negotiate_options_no_zeroes(void) "Client supports no zeroes at handshake
end"
+nbd_negotiate_options_check_magic(void) "Checking opts magic"
+nbd_negotiate_options_check_option(uint32_t clientflags) "Checking option 0x%"
PRIx32
+nbd_opt_abort_reply_failed(const char *error) "Reply to NBD_OPT_ABORT request
failed: %s"
+nbd_negotiate_begin(void) "Beginning negotiation"
+nbd_negotiate_old_style(uint64_t size, unsigned flags) "advertising size %" PRIu64
" and flags %x"
+nbd_negotiate_new_style_size_flags(uint64_t size, unsigned flags) "advertising size %"
PRIu64 " and flags %x"
+nbd_negotiate_success(void) "Negotiation succeeded"
+nbd_receive_request(uint32_t magic, uint16_t flags, uint16_t type, uint64_t from, uint32_t len) "Got request: { magic = 0x%"
PRIx32 ", .flags = %" PRIx16 ", .type = %" PRIx16 ", from = %" PRIu64 ", len = %" PRIu32 "
}"
+nbd_send_reply(int32_t error, uint64_t handle) "Sending response to client: { .error = %" PRId32
", handle = %" PRIu64 " }"
+blk_aio_attached(const char *name, void *ctx) "Export %s: Attaching clients to AIO
context %p\n"
+blk_aio_detach(const char *name, void *ctx) "Export %s: Detaching clients from AIO
context %p\n"
+nbd_co_receive_request_decode_type(void) "Decoding type"