#include <errno.h>
#include <fcntl.h>
+#include <lttng/ust-ctl.h>
#include <ust-comm.h>
#include <helper.h>
#include <lttng/ust-error.h>
+#include <lttng/ust-events.h>
+#include <usterr-signal-safe.h>
+
+#include "../liblttng-ust/compat.h"
#define USTCOMM_CODE_OFFSET(code) \
(code == LTTNG_UST_OK ? 0 : (code - LTTNG_UST_ERR + 1))
[ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_PERM) ] = "Permission denied",
[ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_NOSYS) ] = "Not implemented",
[ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_EXITING) ] = "Process is exiting",
+
+ [ 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",
};
/*
*/
fd = socket(PF_UNIX, SOCK_STREAM, 0);
if (fd < 0) {
- perror("socket");
+ PERROR("socket");
ret = -errno;
goto error;
}
ret = fcntl(fd, F_SETFD, FD_CLOEXEC);
if (ret < 0) {
- perror("fcntl");
+ PERROR("fcntl");
ret = -errno;
goto error_fcntl;
}
closeret = close(fd);
if (closeret)
- perror("close");
+ PERROR("close");
}
error:
return ret;
/* Blocking call */
new_fd = accept(sock, (struct sockaddr *) &sun, &len);
if (new_fd < 0) {
- perror("accept");
+ PERROR("accept");
return -errno;
}
return new_fd;
/* Create server socket */
if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) {
- perror("socket");
+ PERROR("socket");
ret = -errno;
goto error;
}
(void) unlink(pathname);
ret = bind(fd, (struct sockaddr *) &sun, sizeof(sun));
if (ret < 0) {
- perror("bind");
+ PERROR("bind");
ret = -errno;
goto error_close;
}
closeret = close(fd);
if (closeret) {
- perror("close");
+ PERROR("close");
}
}
error:
ret = listen(sock, LTTNG_UST_COMM_MAX_LISTEN);
if (ret < 0) {
ret = -errno;
- perror("listen");
+ PERROR("listen");
}
return ret;
ret = close(sock);
if (ret < 0) {
- perror("close");
+ PERROR("close");
ret = -errno;
}
int shutret;
if (errno != EPIPE && errno != ECONNRESET)
- perror("recvmsg");
+ PERROR("recvmsg");
ret = -errno;
shutret = shutdown(sock, SHUT_RDWR);
if (shutret)
- fprintf(stderr, "Socket shutdown error");
+ ERR("Socket shutdown error");
}
return ret;
* Send buf data of size len. Using sendmsg API.
* Return the size of sent data.
*/
-ssize_t ustcomm_send_unix_sock(int sock, void *buf, size_t len)
+ssize_t ustcomm_send_unix_sock(int sock, const void *buf, size_t len)
{
struct msghdr msg;
struct iovec iov[1];
memset(&msg, 0, sizeof(msg));
- iov[0].iov_base = buf;
+ iov[0].iov_base = (void *) buf;
iov[0].iov_len = len;
msg.msg_iov = iov;
msg.msg_iovlen = 1;
int shutret;
if (errno != EPIPE && errno != ECONNRESET)
- perror("sendmsg");
+ PERROR("sendmsg");
ret = -errno;
shutret = shutdown(sock, SHUT_RDWR);
if (shutret)
- fprintf(stderr, "Socket shutdown error");
+ ERR("Socket shutdown error");
}
return ret;
* We consider EPIPE and ECONNRESET as expected.
*/
if (errno != EPIPE && errno != ECONNRESET) {
- perror("sendmsg");
+ PERROR("sendmsg");
}
}
return ret;
} while (ret < 0 && errno == EINTR);
if (ret < 0) {
if (errno != EPIPE && errno != ECONNRESET) {
- perror("recvmsg fds");
+ PERROR("recvmsg fds");
}
if (errno == EPIPE || errno == ECONNRESET)
ret = -errno;
goto end;
}
if (ret != 1) {
- fprintf(stderr, "Error: Received %zd bytes, expected %d\n",
+ ERR("Error: Received %zd bytes, expected %d\n",
ret, 1);
goto end;
}
if (msg.msg_flags & MSG_CTRUNC) {
- fprintf(stderr, "Error: Control message truncated.\n");
+ ERR("Error: Control message truncated.\n");
ret = -1;
goto end;
}
cmsg = CMSG_FIRSTHDR(&msg);
if (!cmsg) {
- fprintf(stderr, "Error: Invalid control message header\n");
+ ERR("Error: Invalid control message header\n");
ret = -1;
goto end;
}
if (cmsg->cmsg_level != SOL_SOCKET || cmsg->cmsg_type != SCM_RIGHTS) {
- fprintf(stderr, "Didn't received any fd\n");
+ ERR("Didn't received any fd\n");
ret = -1;
goto end;
}
if (cmsg->cmsg_len != CMSG_LEN(sizeof_fds)) {
- fprintf(stderr, "Error: Received %zu bytes of ancillary data, expected %zu\n",
+ ERR("Error: Received %zu bytes of ancillary data, expected %zu\n",
(size_t) cmsg->cmsg_len, (size_t) CMSG_LEN(sizeof_fds));
ret = -1;
goto end;
if (len < 0) {
return len;
} else {
- fprintf(stderr, "incorrect message size: %zd\n", len);
+ ERR("incorrect message size: %zd\n", len);
return -EINVAL;
}
}
return -EPIPE;
case sizeof(*lur):
if (lur->handle != expected_handle) {
- fprintf(stderr, "Unexpected result message handle: "
+ ERR("Unexpected result message handle: "
"expected: %u vs received: %u\n",
expected_handle, lur->handle);
return -EINVAL;
}
if (lur->cmd != expected_cmd) {
- fprintf(stderr, "Unexpected result message command "
+ ERR("Unexpected result message command "
"expected: %u vs received: %u\n",
expected_cmd, lur->cmd);
return -EINVAL;
len = -errno;
return len;
} else {
- fprintf(stderr, "incorrect message size: %zd\n", len);
+ ERR("incorrect message size: %zd\n", len);
return len;
}
}
error:
return ret;
}
+
+/*
+ * Returns 0 on success, negative error value on error.
+ */
+int ustcomm_send_reg_msg(int sock,
+ enum ustctl_socket_type type,
+ uint32_t bits_per_long,
+ uint32_t uint8_t_alignment,
+ uint32_t uint16_t_alignment,
+ uint32_t uint32_t_alignment,
+ uint32_t uint64_t_alignment,
+ uint32_t long_alignment)
+{
+ ssize_t len;
+ struct ustctl_reg_msg reg_msg;
+
+ reg_msg.magic = LTTNG_UST_COMM_MAGIC;
+ reg_msg.major = LTTNG_UST_ABI_MAJOR_VERSION;
+ reg_msg.minor = LTTNG_UST_ABI_MINOR_VERSION;
+ reg_msg.pid = getpid();
+ reg_msg.ppid = getppid();
+ reg_msg.uid = getuid();
+ reg_msg.gid = getgid();
+ reg_msg.bits_per_long = bits_per_long;
+ reg_msg.uint8_t_alignment = uint8_t_alignment;
+ reg_msg.uint16_t_alignment = uint16_t_alignment;
+ reg_msg.uint32_t_alignment = uint32_t_alignment;
+ 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);
+ memset(reg_msg.padding, 0, sizeof(reg_msg.padding));
+
+ len = ustcomm_send_unix_sock(sock, ®_msg, sizeof(reg_msg));
+ if (len > 0 && len != sizeof(reg_msg))
+ return -EIO;
+ if (len < 0)
+ return len;
+ return 0;
+}
+
+static
+int serialize_basic_type(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;
+ uit->encoding = lit->encoding;
+ uit->alignment = lit->alignment;
+ break;
+ }
+ case atype_string:
+ {
+ ubt->string.encoding = lbt->string.encoding;
+ break;
+ }
+ case atype_float:
+ {
+ struct ustctl_float_type *uft;
+ const struct lttng_float_type *lft;
+
+ uft = &ubt->_float;
+ lft = &lbt->_float;
+ uft->exp_dig = lft->exp_dig;
+ uft->mant_dig = lft->mant_dig;
+ uft->alignment = lft->alignment;
+ uft->reverse_byte_order = lft->reverse_byte_order;
+ break;
+ }
+ case atype_enum:
+ case atype_array:
+ case atype_sequence:
+ default:
+ return -EINVAL;
+ }
+ return 0;
+
+}
+
+static
+int serialize_one_type(struct ustctl_type *ut, const struct lttng_type *lt)
+{
+ int ret;
+
+ switch (lt->atype) {
+ case atype_integer:
+ case atype_float:
+ case atype_string:
+ ret = serialize_basic_type(lt->atype,
+ &ut->u.basic, <->u.basic);
+ if (ret)
+ return ret;
+ break;
+ case atype_array:
+ {
+ struct ustctl_basic_type *ubt;
+ const struct lttng_basic_type *lbt;
+ int ret;
+
+ ubt = &ut->u.array.elem_type;
+ lbt = <->u.array.elem_type;
+ ut->u.array.length = lt->u.array.length;
+ ret = serialize_basic_type(lbt->atype,
+ &ubt->u.basic, &lbt->u.basic);
+ if (ret)
+ return -EINVAL;
+ break;
+ }
+ case atype_sequence:
+ {
+ struct ustctl_basic_type *ubt;
+ const struct lttng_basic_type *lbt;
+ int ret;
+
+ ubt = &ut->u.sequence.length_type;
+ lbt = <->u.sequence.length_type;
+ ret = serialize_basic_type(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(lbt->atype,
+ &ubt->u.basic, &lbt->u.basic);
+ if (ret)
+ return -EINVAL;
+ break;
+ }
+ case atype_enum:
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static
+int serialize_fields(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;
+
+ fields = zmalloc(nr_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++;
+ }
+
+ *_nr_write_fields = nr_write_fields;
+ *ustctl_fields = fields;
+ return 0;
+
+error_type:
+ free(fields);
+ return ret;
+}
+
+/*
+ * Returns 0 on success, negative error value on error.
+ */
+int ustcomm_register_event(int sock,
+ int session_objd, /* session descriptor */
+ int channel_objd, /* channel descriptor */
+ const char *event_name, /* event name (input) */
+ int loglevel,
+ const char *signature, /* event signature (input) */
+ size_t nr_fields, /* fields */
+ const struct lttng_event_field *lttng_fields,
+ const char *model_emf_uri,
+ uint32_t *id) /* event id (output) */
+{
+ ssize_t len;
+ struct {
+ struct ustcomm_notify_hdr header;
+ struct ustcomm_notify_event_msg m;
+ } msg;
+ struct {
+ struct ustcomm_notify_hdr header;
+ struct ustcomm_notify_event_reply r;
+ } reply;
+ size_t signature_len, fields_len, model_emf_uri_len;
+ struct ustctl_field *fields;
+ size_t nr_write_fields = 0;
+ int ret;
+
+ memset(&msg, 0, sizeof(msg));
+ msg.header.notify_cmd = USTCTL_NOTIFY_CMD_EVENT;
+ msg.m.session_objd = session_objd;
+ msg.m.channel_objd = channel_objd;
+ strncpy(msg.m.event_name, event_name, LTTNG_UST_SYM_NAME_LEN);
+ msg.m.event_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
+ msg.m.loglevel = loglevel;
+ signature_len = strlen(signature) + 1;
+ msg.m.signature_len = signature_len;
+
+ /* Calculate fields len, serialize fields. */
+ if (nr_fields > 0) {
+ ret = serialize_fields(&nr_write_fields, &fields,
+ nr_fields, lttng_fields);
+ if (ret)
+ return ret;
+ }
+
+ fields_len = sizeof(*fields) * nr_write_fields;
+ msg.m.fields_len = fields_len;
+ if (model_emf_uri) {
+ model_emf_uri_len = strlen(model_emf_uri) + 1;
+ } else {
+ 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;
+ }
+ if (len < 0) {
+ free(fields);
+ return len;
+ }
+
+ /* send signature */
+ len = ustcomm_send_unix_sock(sock, signature, signature_len);
+ if (len > 0 && len != signature_len) {
+ free(fields);
+ return -EIO;
+ }
+ if (len < 0) {
+ free(fields);
+ return len;
+ }
+
+ /* 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;
+ }
+ if (len < 0) {
+ return len;
+ }
+ }
+
+ 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)
+ return -EIO;
+ if (len < 0)
+ return len;
+ }
+
+ /* 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.event_id;
+ DBG("Sent register event notification for name \"%s\": ret_code %d, event_id %u\n",
+ event_name, reply.r.ret_code, reply.r.event_id);
+ 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;
+ }
+ }
+}
+
+/*
+ * Returns 0 on success, negative error value on error.
+ * Returns -EPIPE or -ECONNRESET if other end has hung up.
+ */
+int ustcomm_register_channel(int sock,
+ int session_objd, /* session descriptor */
+ int channel_objd, /* channel descriptor */
+ size_t nr_ctx_fields,
+ const struct lttng_event_field *ctx_fields,
+ uint32_t *chan_id, /* channel id (output) */
+ int *header_type) /* header type (output) */
+{
+ ssize_t len;
+ struct {
+ struct ustcomm_notify_hdr header;
+ struct ustcomm_notify_channel_msg m;
+ } msg;
+ struct {
+ struct ustcomm_notify_hdr header;
+ struct ustcomm_notify_channel_reply r;
+ } reply;
+ size_t fields_len;
+ struct ustctl_field *fields;
+ int ret;
+ size_t nr_write_fields = 0;
+
+ memset(&msg, 0, sizeof(msg));
+ msg.header.notify_cmd = USTCTL_NOTIFY_CMD_CHANNEL;
+ msg.m.session_objd = session_objd;
+ msg.m.channel_objd = channel_objd;
+
+ /* Calculate fields len, serialize fields. */
+ if (nr_ctx_fields > 0) {
+ ret = serialize_fields(&nr_write_fields, &fields,
+ nr_ctx_fields, ctx_fields);
+ if (ret)
+ return ret;
+ }
+
+ fields_len = sizeof(*fields) * nr_write_fields;
+ msg.m.ctx_fields_len = fields_len;
+ len = ustcomm_send_unix_sock(sock, &msg, sizeof(msg));
+ if (len > 0 && len != sizeof(msg)) {
+ free(fields);
+ return -EIO;
+ }
+ if (len < 0) {
+ free(fields);
+ return len;
+ }
+
+ /* 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;
+ }
+ if (len < 0) {
+ return len;
+ }
+ }
+
+ 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;
+ *chan_id = reply.r.chan_id;
+ switch (reply.r.header_type) {
+ case 1:
+ case 2:
+ *header_type = reply.r.header_type;
+ break;
+ default:
+ ERR("Unexpected channel header type %u\n",
+ reply.r.header_type);
+ return -EINVAL;
+ }
+ DBG("Sent register channel notification: chan_id %d, header_type %d\n",
+ reply.r.chan_id, reply.r.header_type);
+ 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;
+ }
+ }
+}
projects / lttng-ust.git / blobdiff