#include <helper.h>
#include <lttng/ust-error.h>
#include <lttng/ust-events.h>
+#include <lttng/ust-dynamic-type.h>
#include <usterr-signal-safe.h>
#include "../liblttng-ust/compat.h"
#define USTCOMM_MAX_SEND_FDS 4
+static
+ssize_t count_fields_recursive(size_t nr_fields,
+ const struct lttng_event_field *lttng_fields);
+static
+int serialize_one_field(struct lttng_session *session,
+ struct ustctl_field *fields, size_t *iter_output,
+ const struct lttng_event_field *lf);
+
/*
* Human readable error message.
*/
}
static
-int serialize_string_encoding(enum ustctl_string_encodings *ue,
+ssize_t count_one_type(const struct lttng_type *lt)
+{
+ switch (lt->atype) {
+ case atype_integer:
+ case atype_float:
+ case atype_string:
+ case atype_enum:
+ case atype_array:
+ case atype_sequence:
+ return 1;
+ case atype_struct:
+ //TODO: implement non-empty struct.
+ return 1;
+ case atype_dynamic:
+ {
+ const struct lttng_event_field *choices;
+ size_t nr_choices;
+ int ret;
+
+ ret = lttng_ust_dynamic_type_choices(&nr_choices,
+ &choices);
+ if (ret)
+ return ret;
+ /*
+ * One field for enum, one field for variant, and
+ * one field per choice.
+ */
+ return count_fields_recursive(nr_choices, choices) + 2;
+ }
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static
+ssize_t count_fields_recursive(size_t nr_fields,
+ const struct lttng_event_field *lttng_fields)
+{
+ int i;
+ ssize_t ret, count = 0;
+
+ for (i = 0; i < nr_fields; i++) {
+ const struct lttng_event_field *lf;
+
+ lf = <tng_fields[i];
+ /* skip 'nowrite' fields */
+ if (lf->nowrite)
+ continue;
+ ret = count_one_type(&lf->type);
+ if (ret < 0)
+ return ret; /* error */
+ count += ret;
+ }
+ return count;
+}
+
+static
+ssize_t count_ctx_fields_recursive(size_t nr_fields,
+ const struct lttng_ctx_field *lttng_fields)
+{
+ int i;
+ ssize_t ret, count = 0;
+
+ for (i = 0; i < nr_fields; i++) {
+ const struct lttng_event_field *lf;
+
+ lf = <tng_fields[i].event_field;
+ /* skip 'nowrite' fields */
+ if (lf->nowrite)
+ continue;
+ ret = count_one_type(&lf->type);
+ if (ret < 0)
+ return ret; /* error */
+ count += ret;
+ }
+ return count;
+}
+
+static
+int serialize_string_encoding(int32_t *ue,
enum lttng_string_encodings le)
{
switch (le) {
}
static
-int serialize_basic_type(enum ustctl_abstract_types *uatype,
+int serialize_integer_type(struct ustctl_integer_type *uit,
+ const struct lttng_integer_type *lit)
+{
+ uit->size = lit->size;
+ uit->signedness = lit->signedness;
+ uit->reverse_byte_order = lit->reverse_byte_order;
+ uit->base = lit->base;
+ if (serialize_string_encoding(&uit->encoding, lit->encoding))
+ return -EINVAL;
+ uit->alignment = lit->alignment;
+ return 0;
+}
+
+static
+int serialize_basic_type(struct lttng_session *session,
+ enum ustctl_abstract_types *uatype,
enum lttng_abstract_types atype,
union _ustctl_basic_type *ubt,
const union _lttng_basic_type *lbt)
switch (atype) {
case atype_integer:
{
- struct ustctl_integer_type *uit;
- const struct lttng_integer_type *lit;
-
- uit = &ubt->integer;
- lit = &lbt->integer;
- uit->size = lit->size;
- uit->signedness = lit->signedness;
- uit->reverse_byte_order = lit->reverse_byte_order;
- uit->base = lit->base;
- if (serialize_string_encoding(&uit->encoding, lit->encoding))
+ if (serialize_integer_type(&ubt->integer, &lbt->integer))
return -EINVAL;
- uit->alignment = lit->alignment;
*uatype = ustctl_atype_integer;
break;
}
break;
}
case atype_enum:
+ {
+ strncpy(ubt->enumeration.name, lbt->enumeration.desc->name,
+ LTTNG_UST_SYM_NAME_LEN);
+ ubt->enumeration.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
+ if (serialize_integer_type(&ubt->enumeration.container_type,
+ &lbt->enumeration.container_type))
+ return -EINVAL;
+ if (session) {
+ const struct lttng_enum *_enum;
+
+ _enum = lttng_ust_enum_get(session,
+ lbt->enumeration.desc->name);
+ if (!_enum)
+ return -EINVAL;
+ ubt->enumeration.id = _enum->id;
+ } else {
+ ubt->enumeration.id = -1ULL;
+ }
+ *uatype = ustctl_atype_enum;
+ break;
+ }
case atype_array:
case atype_sequence:
default:
}
static
-int serialize_one_type(struct ustctl_type *ut, const struct lttng_type *lt)
+int serialize_dynamic_type(struct lttng_session *session,
+ struct ustctl_field *fields, size_t *iter_output,
+ const struct lttng_event_field *lf)
{
+ const struct lttng_event_field *choices;
+ char tag_field_name[LTTNG_UST_SYM_NAME_LEN];
+ const struct lttng_type *tag_type;
+ const struct lttng_event_field *tag_field_generic;
+ struct lttng_event_field tag_field = {
+ .name = tag_field_name,
+ .nowrite = 0,
+ };
+ struct ustctl_field *uf;
+ size_t nr_choices, i;
int ret;
+ tag_field_generic = lttng_ust_dynamic_type_tag_field();
+ tag_type = &tag_field_generic->type;
+
+ /* Serialize enum field. */
+ strncpy(tag_field_name, lf->name, LTTNG_UST_SYM_NAME_LEN);
+ tag_field_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
+ strncat(tag_field_name,
+ "_tag",
+ LTTNG_UST_SYM_NAME_LEN - strlen(tag_field_name) - 1);
+ tag_field.type = *tag_type;
+ ret = serialize_one_field(session, fields, iter_output,
+ &tag_field);
+ if (ret)
+ return ret;
+
+ /* Serialize variant field. */
+ uf = &fields[*iter_output];
+ ret = lttng_ust_dynamic_type_choices(&nr_choices, &choices);
+ if (ret)
+ return ret;
+
+ strncpy(uf->name, lf->name, LTTNG_UST_SYM_NAME_LEN);
+ uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
+ uf->type.atype = ustctl_atype_variant;
+ uf->type.u.variant.nr_choices = nr_choices;
+ strncpy(uf->type.u.variant.tag_name,
+ tag_field_name,
+ LTTNG_UST_SYM_NAME_LEN);
+ uf->type.u.variant.tag_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
+ (*iter_output)++;
+
+ /* Serialize choice fields after variant. */
+ for (i = 0; i < nr_choices; i++) {
+ ret = serialize_one_field(session, fields,
+ iter_output, &choices[i]);
+ if (ret)
+ return ret;
+ }
+ return 0;
+}
+
+static
+int serialize_one_field(struct lttng_session *session,
+ struct ustctl_field *fields, size_t *iter_output,
+ const struct lttng_event_field *lf)
+{
+ const struct lttng_type *lt = &lf->type;
+ int ret;
+
+ /* skip 'nowrite' fields */
+ if (lf->nowrite)
+ return 0;
+
switch (lt->atype) {
case atype_integer:
case atype_float:
case atype_string:
- ret = serialize_basic_type(&ut->atype, lt->atype,
+ case atype_enum:
+ {
+ struct ustctl_field *uf = &fields[*iter_output];
+ struct ustctl_type *ut = &uf->type;
+
+ strncpy(uf->name, lf->name, LTTNG_UST_SYM_NAME_LEN);
+ uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
+ ret = serialize_basic_type(session, &ut->atype, lt->atype,
&ut->u.basic, <->u.basic);
if (ret)
return ret;
+ (*iter_output)++;
break;
+ }
case atype_array:
{
+ struct ustctl_field *uf = &fields[*iter_output];
+ struct ustctl_type *ut = &uf->type;
struct ustctl_basic_type *ubt;
const struct lttng_basic_type *lbt;
- int ret;
+ strncpy(uf->name, lf->name, LTTNG_UST_SYM_NAME_LEN);
+ uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
+ uf->type.atype = ustctl_atype_array;
ubt = &ut->u.array.elem_type;
lbt = <->u.array.elem_type;
ut->u.array.length = lt->u.array.length;
- ret = serialize_basic_type(&ubt->atype, lbt->atype,
+ ret = serialize_basic_type(session, &ubt->atype, lbt->atype,
&ubt->u.basic, &lbt->u.basic);
if (ret)
return -EINVAL;
ut->atype = ustctl_atype_array;
+ (*iter_output)++;
break;
}
case atype_sequence:
{
+ struct ustctl_field *uf = &fields[*iter_output];
+ struct ustctl_type *ut = &uf->type;
struct ustctl_basic_type *ubt;
const struct lttng_basic_type *lbt;
int ret;
+ strncpy(uf->name, lf->name, LTTNG_UST_SYM_NAME_LEN);
+ uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
+ uf->type.atype = ustctl_atype_sequence;
ubt = &ut->u.sequence.length_type;
lbt = <->u.sequence.length_type;
- ret = serialize_basic_type(&ubt->atype, lbt->atype,
+ ret = serialize_basic_type(session, &ubt->atype, lbt->atype,
&ubt->u.basic, &lbt->u.basic);
if (ret)
return -EINVAL;
ubt = &ut->u.sequence.elem_type;
lbt = <->u.sequence.elem_type;
- ret = serialize_basic_type(&ubt->atype, lbt->atype,
+ ret = serialize_basic_type(session, &ubt->atype, lbt->atype,
&ubt->u.basic, &lbt->u.basic);
if (ret)
return -EINVAL;
ut->atype = ustctl_atype_sequence;
+ (*iter_output)++;
+ break;
+ }
+ case atype_dynamic:
+ {
+ ret = serialize_dynamic_type(session, fields, iter_output, lf);
+ if (ret)
+ return -EINVAL;
+ break;
+ }
+ case atype_struct:
+ {
+ struct ustctl_field *uf = &fields[*iter_output];
+
+ /*
+ * TODO: add support for non-empty struct.
+ */
+ if (lf->type.u._struct.nr_fields != 0) {
+ return -EINVAL;
+ }
+ strncpy(uf->name, lf->name, LTTNG_UST_SYM_NAME_LEN);
+ uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
+ uf->type.atype = ustctl_atype_struct;
+ uf->type.u._struct.nr_fields = 0;
+ (*iter_output)++;
break;
}
- case atype_enum:
default:
return -EINVAL;
}
}
static
-int serialize_fields(size_t *_nr_write_fields,
+int serialize_fields(struct lttng_session *session,
+ size_t *_nr_write_fields,
struct ustctl_field **ustctl_fields,
size_t nr_fields,
const struct lttng_event_field *lttng_fields)
{
struct ustctl_field *fields;
- int i, ret;
- size_t nr_write_fields = 0;
+ int ret;
+ size_t i, iter_output = 0;
+ ssize_t nr_write_fields;
+
+ nr_write_fields = count_fields_recursive(nr_fields, lttng_fields);
+ if (nr_write_fields < 0) {
+ return (int) nr_write_fields;
+ }
- fields = zmalloc(nr_fields * sizeof(*fields));
+ fields = zmalloc(nr_write_fields * sizeof(*fields));
if (!fields)
return -ENOMEM;
for (i = 0; i < nr_fields; i++) {
- struct ustctl_field *f;
- const struct lttng_event_field *lf;
-
- f = &fields[nr_write_fields];
- lf = <tng_fields[i];
-
- /* skip 'nowrite' fields */
- if (lf->nowrite)
- continue;
- strncpy(f->name, lf->name, LTTNG_UST_SYM_NAME_LEN);
- f->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
- ret = serialize_one_type(&f->type, &lf->type);
+ ret = serialize_one_field(session, fields, &iter_output,
+ <tng_fields[i]);
if (ret)
goto error_type;
- nr_write_fields++;
}
*_nr_write_fields = nr_write_fields;
}
static
-int serialize_ctx_fields(size_t *_nr_write_fields,
+int serialize_entries(struct ustctl_enum_entry **_entries,
+ size_t nr_entries,
+ const struct lttng_enum_entry *lttng_entries)
+{
+ struct ustctl_enum_entry *entries;
+ int i;
+
+ /* Serialize the entries */
+ entries = zmalloc(nr_entries * sizeof(*entries));
+ if (!entries)
+ return -ENOMEM;
+ for (i = 0; i < nr_entries; i++) {
+ struct ustctl_enum_entry *uentry;
+ const struct lttng_enum_entry *lentry;
+
+ uentry = &entries[i];
+ lentry = <tng_entries[i];
+
+ uentry->start.value = lentry->start.value;
+ uentry->start.signedness = lentry->start.signedness;
+ uentry->end.value = lentry->end.value;
+ uentry->end.signedness = lentry->end.signedness;
+ strncpy(uentry->string, lentry->string, LTTNG_UST_SYM_NAME_LEN);
+ uentry->string[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
+ }
+ *_entries = entries;
+ return 0;
+}
+
+static
+int serialize_ctx_fields(struct lttng_session *session,
+ size_t *_nr_write_fields,
struct ustctl_field **ustctl_fields,
size_t nr_fields,
const struct lttng_ctx_field *lttng_fields)
{
struct ustctl_field *fields;
- int i, ret;
- size_t nr_write_fields = 0;
+ int ret;
+ size_t i, iter_output = 0;
+ ssize_t nr_write_fields;
+
+ nr_write_fields = count_ctx_fields_recursive(nr_fields,
+ lttng_fields);
+ if (nr_write_fields < 0) {
+ return (int) nr_write_fields;
+ }
- fields = zmalloc(nr_fields * sizeof(*fields));
+ fields = zmalloc(nr_write_fields * sizeof(*fields));
if (!fields)
return -ENOMEM;
for (i = 0; i < nr_fields; i++) {
- struct ustctl_field *f;
- const struct lttng_event_field *lf;
-
- f = &fields[nr_write_fields];
- lf = <tng_fields[i].event_field;
-
- /* skip 'nowrite' fields */
- if (lf->nowrite)
- continue;
- strncpy(f->name, lf->name, LTTNG_UST_SYM_NAME_LEN);
- f->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
- ret = serialize_one_type(&f->type, &lf->type);
+ ret = serialize_one_field(session, fields, &iter_output,
+ <tng_fields[i].event_field);
if (ret)
goto error_type;
- nr_write_fields++;
}
*_nr_write_fields = nr_write_fields;
* Returns 0 on success, negative error value on error.
*/
int ustcomm_register_event(int sock,
+ struct lttng_session *session,
int session_objd, /* session descriptor */
int channel_objd, /* channel descriptor */
const char *event_name, /* event name (input) */
/* Calculate fields len, serialize fields. */
if (nr_fields > 0) {
- ret = serialize_fields(&nr_write_fields, &fields,
+ ret = serialize_fields(session, &nr_write_fields, &fields,
nr_fields, lttng_fields);
if (ret)
return ret;
model_emf_uri_len = 0;
}
msg.m.model_emf_uri_len = model_emf_uri_len;
+
len = ustcomm_send_unix_sock(sock, &msg, sizeof(msg));
if (len > 0 && len != sizeof(msg)) {
- free(fields);
- return -EIO;
+ ret = -EIO;
+ goto error_fields;
}
if (len < 0) {
- free(fields);
- return len;
+ ret = len;
+ goto error_fields;
}
/* send signature */
len = ustcomm_send_unix_sock(sock, signature, signature_len);
if (len > 0 && len != signature_len) {
- free(fields);
- return -EIO;
+ ret = -EIO;
+ goto error_fields;
}
if (len < 0) {
- free(fields);
- return len;
+ ret = len;
+ goto error_fields;
}
/* send fields */
if (fields_len > 0) {
len = ustcomm_send_unix_sock(sock, fields, fields_len);
- free(fields);
if (len > 0 && len != fields_len) {
- return -EIO;
+ ret = -EIO;
+ goto error_fields;
}
if (len < 0) {
- return len;
+ ret = len;
+ goto error_fields;
}
- } else {
- free(fields);
}
+ free(fields);
if (model_emf_uri_len) {
/* send model_emf_uri */
len = ustcomm_send_unix_sock(sock, model_emf_uri,
model_emf_uri_len);
- if (len > 0 && len != model_emf_uri_len)
+ if (len > 0 && len != model_emf_uri_len) {
return -EIO;
- if (len < 0)
+ }
+ if (len < 0) {
return len;
+ }
}
/* receive reply */
return len;
}
}
+ /* Unreached. */
+
+ /* Error path only. */
+error_fields:
+ free(fields);
+ return ret;
+}
+
+/*
+ * Returns 0 on success, negative error value on error.
+ * Returns -EPIPE or -ECONNRESET if other end has hung up.
+ */
+int ustcomm_register_enum(int sock,
+ int session_objd, /* session descriptor */
+ const char *enum_name, /* enum name (input) */
+ size_t nr_entries, /* entries */
+ const struct lttng_enum_entry *lttng_entries,
+ uint64_t *id)
+{
+ ssize_t len;
+ struct {
+ struct ustcomm_notify_hdr header;
+ struct ustcomm_notify_enum_msg m;
+ } msg;
+ struct {
+ struct ustcomm_notify_hdr header;
+ struct ustcomm_notify_enum_reply r;
+ } reply;
+ size_t entries_len;
+ struct ustctl_enum_entry *entries = NULL;
+ int ret;
+
+ memset(&msg, 0, sizeof(msg));
+ msg.header.notify_cmd = USTCTL_NOTIFY_CMD_ENUM;
+ msg.m.session_objd = session_objd;
+ strncpy(msg.m.enum_name, enum_name, LTTNG_UST_SYM_NAME_LEN);
+ msg.m.enum_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
+
+ /* Calculate entries len, serialize entries. */
+ if (nr_entries > 0) {
+ ret = serialize_entries(&entries,
+ nr_entries, lttng_entries);
+ if (ret)
+ return ret;
+ }
+
+ entries_len = sizeof(*entries) * nr_entries;
+ msg.m.entries_len = entries_len;
+
+ len = ustcomm_send_unix_sock(sock, &msg, sizeof(msg));
+ if (len > 0 && len != sizeof(msg)) {
+ ret = -EIO;
+ goto error_entries;
+ }
+ if (len < 0) {
+ ret = len;
+ goto error_entries;
+ }
+
+ /* send entries */
+ if (entries_len > 0) {
+ len = ustcomm_send_unix_sock(sock, entries, entries_len);
+ if (len > 0 && len != entries_len) {
+ ret = -EIO;
+ goto error_entries;
+ }
+ if (len < 0) {
+ ret = len;
+ goto error_entries;
+ }
+ }
+ free(entries);
+ entries = NULL;
+
+ /* receive reply */
+ len = ustcomm_recv_unix_sock(sock, &reply, sizeof(reply));
+ switch (len) {
+ case 0: /* orderly shutdown */
+ return -EPIPE;
+ case sizeof(reply):
+ if (reply.header.notify_cmd != msg.header.notify_cmd) {
+ ERR("Unexpected result message command "
+ "expected: %u vs received: %u\n",
+ msg.header.notify_cmd, reply.header.notify_cmd);
+ return -EINVAL;
+ }
+ if (reply.r.ret_code > 0)
+ return -EINVAL;
+ if (reply.r.ret_code < 0)
+ return reply.r.ret_code;
+ *id = reply.r.enum_id;
+ DBG("Sent register enum notification for name \"%s\": ret_code %d\n",
+ enum_name, reply.r.ret_code);
+ return 0;
+ default:
+ if (len < 0) {
+ /* Transport level error */
+ if (errno == EPIPE || errno == ECONNRESET)
+ len = -errno;
+ return len;
+ } else {
+ ERR("incorrect message size: %zd\n", len);
+ return len;
+ }
+ }
+ return ret;
+
+error_entries:
+ free(entries);
+ return ret;
}
/*
* Returns -EPIPE or -ECONNRESET if other end has hung up.
*/
int ustcomm_register_channel(int sock,
+ struct lttng_session *session,
int session_objd, /* session descriptor */
int channel_objd, /* channel descriptor */
size_t nr_ctx_fields,
/* Calculate fields len, serialize fields. */
if (nr_ctx_fields > 0) {
- ret = serialize_ctx_fields(&nr_write_fields, &fields,
+ ret = serialize_ctx_fields(session, &nr_write_fields, &fields,
nr_ctx_fields, ctx_fields);
if (ret)
return ret;
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