* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
-#define _GNU_SOURCE
#include <limits.h>
+#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <lttng/ust-ctl.h>
#include <ust-comm.h>
+#include <ust-fd.h>
#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);
+static
+int serialize_fields(struct lttng_session *session,
+ struct ustctl_field *ustctl_fields,
+ size_t *iter_output, size_t nr_lttng_fields,
+ const struct lttng_event_field *lttng_fields);
+
/*
* Human readable error message.
*/
[ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_INVAL_MAGIC) ] = "Invalid magic number",
[ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_INVAL_SOCKET_TYPE) ] = "Invalid socket type",
[ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_UNSUP_MAJOR) ] = "Unsupported major version",
+ [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_PEERCRED) ] = "Cannot get unix socket peer credentials",
+ [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_PEERCRED_PID) ] = "Peer credentials PID is invalid. Socket appears to belong to a distinct, non-nested pid namespace.",
};
/*
* ustcomm_connect_unix_sock
*
* Connect to unix socket using the path name.
+ *
+ * Caller handles FD tracker.
*/
-int ustcomm_connect_unix_sock(const char *pathname)
+int ustcomm_connect_unix_sock(const char *pathname, long timeout)
{
struct sockaddr_un sun;
int fd, ret;
/*
* libust threads require the close-on-exec flag for all
* resources so it does not leak file descriptors upon exec.
+ * SOCK_CLOEXEC is not used since it is linux specific.
*/
fd = socket(PF_UNIX, SOCK_STREAM, 0);
if (fd < 0) {
ret = -errno;
goto error;
}
+ if (timeout >= 0) {
+ /* Give at least 10ms. */
+ if (timeout < 10)
+ timeout = 10;
+ ret = ustcomm_setsockopt_snd_timeout(fd, timeout);
+ if (ret < 0) {
+ WARN("Error setting connect socket send timeout");
+ }
+ }
ret = fcntl(fd, F_SETFD, FD_CLOEXEC);
if (ret < 0) {
PERROR("fcntl");
* ustcomm_close_unix_sock
*
* Shutdown cleanly a unix socket.
+ *
+ * Handles fd tracker internally.
*/
int ustcomm_close_unix_sock(int sock)
{
int ret;
+ lttng_ust_lock_fd_tracker();
ret = close(sock);
- if (ret < 0) {
+ if (!ret) {
+ lttng_ust_delete_fd_from_tracker(sock);
+ } else {
PERROR("close");
ret = -errno;
}
+ lttng_ust_unlock_fd_tracker();
return ret;
}
msg.msg_controllen = CMSG_LEN(sizeof_fds);
cmptr = CMSG_FIRSTHDR(&msg);
+ if (!cmptr)
+ return -EINVAL;
cmptr->cmsg_level = SOL_SOCKET;
cmptr->cmsg_type = SCM_RIGHTS;
cmptr->cmsg_len = CMSG_LEN(sizeof_fds);
/*
* Recv a message accompanied by fd(s) from a unix socket.
*
- * Returns the size of received data, or negative error value.
- *
* Expect at most "nb_fd" file descriptors. Returns the number of fd
* actually received in nb_fd.
* Returns -EPIPE on orderly shutdown.
char recv_fd[CMSG_SPACE(sizeof_fds)];
struct msghdr msg;
char dummy;
+ int i;
memset(&msg, 0, sizeof(msg));
ret = -1;
goto end;
}
+
memcpy(fds, CMSG_DATA(cmsg), sizeof_fds);
- ret = sizeof_fds;
+
+ /* Set FD_CLOEXEC */
+ for (i = 0; i < nb_fd; i++) {
+ ret = fcntl(fds[i], F_SETFD, FD_CLOEXEC);
+ if (ret < 0) {
+ PERROR("fcntl failed to set FD_CLOEXEC on fd %d",
+ fds[i]);
+ }
+ }
+
+ ret = nb_fd;
end:
return ret;
}
{
void *chan_data;
ssize_t len, nr_fd;
- int wakeup_fd;
+ int wakeup_fd, ret;
if (var_len > LTTNG_UST_CHANNEL_DATA_MAX_LEN) {
len = -EINVAL;
goto error_recv;
}
/* recv wakeup fd */
+ lttng_ust_lock_fd_tracker();
nr_fd = ustcomm_recv_fds_unix_sock(sock, &wakeup_fd, 1);
if (nr_fd <= 0) {
+ lttng_ust_unlock_fd_tracker();
if (nr_fd < 0) {
len = nr_fd;
goto error_recv;
goto error_recv;
}
}
- *_wakeup_fd = wakeup_fd;
+
+ ret = lttng_ust_add_fd_to_tracker(wakeup_fd);
+ if (ret < 0) {
+ ret = close(wakeup_fd);
+ if (ret) {
+ PERROR("close on wakeup_fd");
+ }
+ len = -EIO;
+ lttng_ust_unlock_fd_tracker();
+ goto error_recv;
+ }
+
+ *_wakeup_fd = ret;
+ lttng_ust_unlock_fd_tracker();
+
*_chan_data = chan_data;
return len;
return len;
}
+ssize_t ustcomm_recv_event_notifier_notif_fd_from_sessiond(int sock,
+ int *_event_notifier_notif_fd)
+{
+ ssize_t nr_fd;
+ int event_notifier_notif_fd, ret;
+
+ /* Receive event_notifier notification fd */
+ lttng_ust_lock_fd_tracker();
+ nr_fd = ustcomm_recv_fds_unix_sock(sock, &event_notifier_notif_fd, 1);
+ if (nr_fd <= 0) {
+ lttng_ust_unlock_fd_tracker();
+ if (nr_fd < 0) {
+ ret = nr_fd;
+ goto error;
+ } else {
+ ret = -EIO;
+ goto error;
+ }
+ }
+
+ ret = lttng_ust_add_fd_to_tracker(event_notifier_notif_fd);
+ if (ret < 0) {
+ ret = close(event_notifier_notif_fd);
+ if (ret) {
+ PERROR("close on event_notifier notif fd");
+ }
+ ret = -EIO;
+ lttng_ust_unlock_fd_tracker();
+ goto error;
+ }
+
+ *_event_notifier_notif_fd = ret;
+ lttng_ust_unlock_fd_tracker();
+
+ ret = nr_fd;
+
+error:
+ return ret;
+}
+
int ustcomm_recv_stream_from_sessiond(int sock,
uint64_t *memory_map_size,
int *shm_fd, int *wakeup_fd)
int fds[2];
/* recv shm fd and wakeup fd */
+ lttng_ust_lock_fd_tracker();
len = ustcomm_recv_fds_unix_sock(sock, fds, 2);
if (len <= 0) {
+ lttng_ust_unlock_fd_tracker();
if (len < 0) {
ret = len;
goto error;
goto error;
}
}
- *shm_fd = fds[0];
- *wakeup_fd = fds[1];
+
+ ret = lttng_ust_add_fd_to_tracker(fds[0]);
+ if (ret < 0) {
+ ret = close(fds[0]);
+ if (ret) {
+ PERROR("close on received shm_fd");
+ }
+ ret = -EIO;
+ lttng_ust_unlock_fd_tracker();
+ goto error;
+ }
+ *shm_fd = ret;
+
+ ret = lttng_ust_add_fd_to_tracker(fds[1]);
+ if (ret < 0) {
+ ret = close(*shm_fd);
+ if (ret) {
+ PERROR("close on shm_fd");
+ }
+ *shm_fd = -1;
+ ret = close(fds[1]);
+ if (ret) {
+ PERROR("close on received wakeup_fd");
+ }
+ ret = -EIO;
+ lttng_ust_unlock_fd_tracker();
+ goto error;
+ }
+ *wakeup_fd = ret;
+ lttng_ust_unlock_fd_tracker();
+ return 0;
+
+error:
+ return ret;
+}
+
+ssize_t ustcomm_recv_counter_from_sessiond(int sock,
+ void **_counter_data, uint64_t var_len)
+{
+ void *counter_data;
+ ssize_t len;
+
+ if (var_len > LTTNG_UST_COUNTER_DATA_MAX_LEN) {
+ len = -EINVAL;
+ goto error_check;
+ }
+ /* Receive variable length data */
+ counter_data = zmalloc(var_len);
+ if (!counter_data) {
+ len = -ENOMEM;
+ goto error_alloc;
+ }
+ len = ustcomm_recv_unix_sock(sock, counter_data, var_len);
+ if (len != var_len) {
+ goto error_recv;
+ }
+ *_counter_data = counter_data;
+ return len;
+
+error_recv:
+ free(counter_data);
+error_alloc:
+error_check:
+ return len;
+}
+
+int ustcomm_recv_counter_shm_from_sessiond(int sock,
+ int *shm_fd)
+{
+ ssize_t len;
+ int ret;
+ int fds[1];
+
+ /* recv shm fd fd */
+ lttng_ust_lock_fd_tracker();
+ len = ustcomm_recv_fds_unix_sock(sock, fds, 1);
+ if (len <= 0) {
+ lttng_ust_unlock_fd_tracker();
+ if (len < 0) {
+ ret = len;
+ goto error;
+ } else {
+ ret = -EIO;
+ goto error;
+ }
+ }
+
+ ret = lttng_ust_add_fd_to_tracker(fds[0]);
+ if (ret < 0) {
+ ret = close(fds[0]);
+ if (ret) {
+ PERROR("close on received shm_fd");
+ }
+ ret = -EIO;
+ lttng_ust_unlock_fd_tracker();
+ goto error;
+ }
+ *shm_fd = ret;
+ lttng_ust_unlock_fd_tracker();
return 0;
error:
reg_msg.uint64_t_alignment = uint64_t_alignment;
reg_msg.long_alignment = long_alignment;
reg_msg.socket_type = type;
- lttng_ust_getprocname(reg_msg.name);
+ lttng_pthread_getname_np(reg_msg.name, LTTNG_UST_ABI_PROCNAME_LEN);
memset(reg_msg.padding, 0, sizeof(reg_msg.padding));
len = ustcomm_send_unix_sock(sock, ®_msg, sizeof(reg_msg));
}
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:
+ return count_fields_recursive(lt->u.legacy._struct.nr_fields,
+ lt->u.legacy._struct.fields) + 1;
+ case atype_enum_nestable:
+ return count_one_type(lt->u.enum_nestable.container_type) + 1;
+ case atype_array_nestable:
+ return count_one_type(lt->u.array_nestable.elem_type) + 1;
+ case atype_sequence_nestable:
+ return count_one_type(lt->u.sequence_nestable.elem_type) + 1;
+ case atype_struct_nestable:
+ return count_fields_recursive(lt->u.struct_nestable.nr_fields,
+ lt->u.struct_nestable.fields) + 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;
+ /*
+ * Two fields for enum, one field for variant, and
+ * one field per choice.
+ */
+ return count_fields_recursive(nr_choices, choices) + 3;
+ }
+
+ 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)
+{
+ int32_t encoding;
+
+ uit->size = lit->size;
+ uit->signedness = lit->signedness;
+ uit->reverse_byte_order = lit->reverse_byte_order;
+ uit->base = lit->base;
+ if (serialize_string_encoding(&encoding, lit->encoding))
+ return -EINVAL;
+ uit->encoding = encoding;
+ 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;
}
case atype_string:
{
- if (serialize_string_encoding(&ubt->string.encoding,
- lbt->string.encoding))
+ int32_t encoding;
+
+ if (serialize_string_encoding(&encoding, lbt->string.encoding))
return -EINVAL;
+ ubt->string.encoding = encoding;
*uatype = ustctl_atype_string;
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_from_desc(session, lbt->enumeration.desc);
+ if (!_enum)
+ return -EINVAL;
+ ubt->enumeration.id = _enum->id;
+ } else {
+ ubt->enumeration.id = -1ULL;
+ }
+ *uatype = ustctl_atype_enum;
+ break;
+ }
case atype_array:
+ case atype_array_nestable:
case atype_sequence:
+ case atype_sequence_nestable:
+ case atype_enum_nestable:
default:
return -EINVAL;
}
}
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 char *field_name)
+{
+ 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, field_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, field_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_nestable.nr_choices = nr_choices;
+ strncpy(uf->type.u.variant_nestable.tag_name,
+ tag_field_name,
+ LTTNG_UST_SYM_NAME_LEN);
+ uf->type.u.variant_nestable.tag_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
+ uf->type.u.variant_nestable.alignment = 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_type(struct lttng_session *session,
+ struct ustctl_field *fields, size_t *iter_output,
+ const char *field_name, const struct lttng_type *lt)
{
int ret;
+ /*
+ * Serializing a type (rather than a field) generates a ustctl_field
+ * entry with 0-length name.
+ */
+
switch (lt->atype) {
case atype_integer:
case atype_float:
case atype_string:
- ret = serialize_basic_type(&ut->atype, lt->atype,
- &ut->u.basic, <->u.basic);
+ case atype_enum:
+ {
+ struct ustctl_field *uf = &fields[*iter_output];
+ struct ustctl_type *ut = &uf->type;
+ enum ustctl_abstract_types atype;
+
+ if (field_name) {
+ strncpy(uf->name, field_name, LTTNG_UST_SYM_NAME_LEN);
+ uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
+ } else {
+ uf->name[0] = '\0';
+ }
+ ret = serialize_basic_type(session, &atype, lt->atype,
+ &ut->u.legacy.basic, <->u.legacy.basic);
if (ret)
return ret;
+ ut->atype = atype;
+ (*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;
+ enum ustctl_abstract_types atype;
- 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,
+ if (field_name) {
+ strncpy(uf->name, field_name, LTTNG_UST_SYM_NAME_LEN);
+ uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
+ } else {
+ uf->name[0] = '\0';
+ }
+ ut->atype = ustctl_atype_array;
+ ubt = &ut->u.legacy.array.elem_type;
+ lbt = <->u.legacy.array.elem_type;
+ ut->u.legacy.array.length = lt->u.legacy.array.length;
+ ret = serialize_basic_type(session, &atype, lbt->atype,
&ubt->u.basic, &lbt->u.basic);
if (ret)
return -EINVAL;
- ut->atype = ustctl_atype_array;
+ ubt->atype = atype;
+ (*iter_output)++;
+ break;
+ }
+ case atype_array_nestable:
+ {
+ struct ustctl_field *uf = &fields[*iter_output];
+ struct ustctl_type *ut = &uf->type;
+
+ if (field_name) {
+ strncpy(uf->name, field_name, LTTNG_UST_SYM_NAME_LEN);
+ uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
+ } else {
+ uf->name[0] = '\0';
+ }
+ ut->atype = ustctl_atype_array_nestable;
+ ut->u.array_nestable.length = lt->u.array_nestable.length;
+ ut->u.array_nestable.alignment = lt->u.array_nestable.alignment;
+ (*iter_output)++;
+
+ ret = serialize_one_type(session, fields, iter_output, NULL,
+ lt->u.array_nestable.elem_type);
+ if (ret)
+ return -EINVAL;
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;
+ enum ustctl_abstract_types atype;
- ubt = &ut->u.sequence.length_type;
- lbt = <->u.sequence.length_type;
- ret = serialize_basic_type(&ubt->atype, lbt->atype,
+ if (field_name) {
+ strncpy(uf->name, field_name, LTTNG_UST_SYM_NAME_LEN);
+ uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
+ } else {
+ uf->name[0] = '\0';
+ }
+ uf->type.atype = ustctl_atype_sequence;
+ ubt = &ut->u.legacy.sequence.length_type;
+ lbt = <->u.legacy.sequence.length_type;
+ ret = serialize_basic_type(session, &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,
+ ubt->atype = atype;
+ ubt = &ut->u.legacy.sequence.elem_type;
+ lbt = <->u.legacy.sequence.elem_type;
+ ret = serialize_basic_type(session, &atype, lbt->atype,
&ubt->u.basic, &lbt->u.basic);
if (ret)
return -EINVAL;
- ut->atype = ustctl_atype_sequence;
+ ubt->atype = atype;
+ (*iter_output)++;
+ break;
+ }
+ case atype_sequence_nestable:
+ {
+ struct ustctl_field *uf = &fields[*iter_output];
+ struct ustctl_type *ut = &uf->type;
+
+ if (field_name) {
+ strncpy(uf->name, field_name, LTTNG_UST_SYM_NAME_LEN);
+ uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
+ } else {
+ uf->name[0] = '\0';
+ }
+ ut->atype = ustctl_atype_sequence_nestable;
+ strncpy(ut->u.sequence_nestable.length_name,
+ lt->u.sequence_nestable.length_name,
+ LTTNG_UST_SYM_NAME_LEN);
+ ut->u.sequence_nestable.length_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
+ ut->u.sequence_nestable.alignment = lt->u.sequence_nestable.alignment;
+ (*iter_output)++;
+
+ ret = serialize_one_type(session, fields, iter_output, NULL,
+ lt->u.sequence_nestable.elem_type);
+ if (ret)
+ return -EINVAL;
+ break;
+ }
+ case atype_dynamic:
+ {
+ ret = serialize_dynamic_type(session, fields, iter_output,
+ field_name);
+ if (ret)
+ return -EINVAL;
+ break;
+ }
+ case atype_struct:
+ {
+ struct ustctl_field *uf = &fields[*iter_output];
+
+ if (field_name) {
+ strncpy(uf->name, field_name, LTTNG_UST_SYM_NAME_LEN);
+ uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
+ } else {
+ uf->name[0] = '\0';
+ }
+ uf->type.atype = ustctl_atype_struct;
+ uf->type.u.legacy._struct.nr_fields = lt->u.legacy._struct.nr_fields;
+ (*iter_output)++;
+
+ ret = serialize_fields(session, fields, iter_output,
+ lt->u.legacy._struct.nr_fields,
+ lt->u.legacy._struct.fields);
+ if (ret)
+ return -EINVAL;
+ break;
+ }
+ case atype_struct_nestable:
+ {
+ struct ustctl_field *uf = &fields[*iter_output];
+
+ if (field_name) {
+ strncpy(uf->name, field_name, LTTNG_UST_SYM_NAME_LEN);
+ uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
+ } else {
+ uf->name[0] = '\0';
+ }
+ uf->type.atype = ustctl_atype_struct_nestable;
+ uf->type.u.struct_nestable.nr_fields = lt->u.struct_nestable.nr_fields;
+ uf->type.u.struct_nestable.alignment = lt->u.struct_nestable.alignment;
+ (*iter_output)++;
+
+ ret = serialize_fields(session, fields, iter_output,
+ lt->u.struct_nestable.nr_fields,
+ lt->u.struct_nestable.fields);
+ if (ret)
+ return -EINVAL;
+ break;
+ }
+ case atype_enum_nestable:
+ {
+ struct ustctl_field *uf = &fields[*iter_output];
+ struct ustctl_type *ut = &uf->type;
+
+ if (field_name) {
+ strncpy(uf->name, field_name, LTTNG_UST_SYM_NAME_LEN);
+ uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
+ } else {
+ uf->name[0] = '\0';
+ }
+ strncpy(ut->u.enum_nestable.name, lt->u.enum_nestable.desc->name,
+ LTTNG_UST_SYM_NAME_LEN);
+ ut->u.enum_nestable.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
+ ut->atype = ustctl_atype_enum_nestable;
+ (*iter_output)++;
+
+ ret = serialize_one_type(session, fields, iter_output, NULL,
+ lt->u.enum_nestable.container_type);
+ if (ret)
+ return -EINVAL;
+ if (session) {
+ const struct lttng_enum *_enum;
+
+ _enum = lttng_ust_enum_get_from_desc(session, lt->u.enum_nestable.desc);
+ if (!_enum)
+ return -EINVAL;
+ ut->u.enum_nestable.id = _enum->id;
+ } else {
+ ut->u.enum_nestable.id = -1ULL;
+ }
break;
}
- case atype_enum:
default:
return -EINVAL;
}
}
static
-int serialize_fields(size_t *_nr_write_fields,
+int serialize_one_field(struct lttng_session *session,
+ struct ustctl_field *fields, size_t *iter_output,
+ const struct lttng_event_field *lf)
+{
+ /* skip 'nowrite' fields */
+ if (lf->nowrite)
+ return 0;
+
+ return serialize_one_type(session, fields, iter_output, lf->name, &lf->type);
+}
+
+static
+int serialize_fields(struct lttng_session *session,
+ struct ustctl_field *ustctl_fields,
+ size_t *iter_output, size_t nr_lttng_fields,
+ const struct lttng_event_field *lttng_fields)
+{
+ int ret;
+ size_t i;
+
+ for (i = 0; i < nr_lttng_fields; i++) {
+ ret = serialize_one_field(session, ustctl_fields,
+ iter_output, <tng_fields[i]);
+ if (ret)
+ return ret;
+ }
+ return 0;
+}
+
+static
+int alloc_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 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);
- if (ret)
- goto error_type;
- nr_write_fields++;
- }
+ ret = serialize_fields(session, fields, &iter_output, nr_fields,
+ lttng_fields);
+ if (ret)
+ goto error_type;
*_nr_write_fields = nr_write_fields;
*ustctl_fields = 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';
+
+ if (lentry->u.extra.options & LTTNG_ENUM_ENTRY_OPTION_IS_AUTO) {
+ uentry->u.extra.options |=
+ USTCTL_UST_ENUM_ENTRY_OPTION_IS_AUTO;
+ }
+ }
+ *_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 = alloc_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;
projects / lttng-ust.git / blobdiff