Move lttng_ust_strerror to liblttng-ust
[lttng-ust.git] / src / common / ustcomm.c
index d65889926c5114d9a32bc548f7e081fb7e1f5f94..00cbf5a73bae82b0a30568490eb9923706036125 100644 (file)
 #include "common/ustcomm.h"
 #include "common/ust-fd.h"
 #include "common/macros.h"
-#include <lttng/ust-error.h>
 #include "common/dynamic-type.h"
 #include "common/logging.h"
 
-#include "lib/lttng-ust/ust-events-internal.h"
+#include "common/events.h"
 #include "common/compat/pthread.h"
 
-#define USTCOMM_CODE_OFFSET(code)      \
-       (code == LTTNG_UST_OK ? 0 : (code - LTTNG_UST_ERR + 1))
-
 #define USTCOMM_MAX_SEND_FDS   4
 
 static
 ssize_t count_fields_recursive(size_t nr_fields,
-               const struct lttng_ust_event_field **lttng_fields);
+               const struct lttng_ust_event_field * const *lttng_fields);
 static
 int serialize_one_field(struct lttng_ust_session *session,
-               struct ustctl_field *fields, size_t *iter_output,
+               struct lttng_ust_ctl_field *fields, size_t *iter_output,
                const struct lttng_ust_event_field *lf);
 static
 int serialize_fields(struct lttng_ust_session *session,
-               struct ustctl_field *ustctl_fields,
+               struct lttng_ust_ctl_field *lttng_ust_ctl_fields,
                size_t *iter_output, size_t nr_lttng_fields,
-               const struct lttng_ust_event_field **lttng_fields);
-
-/*
- * Human readable error message.
- */
-static const char *ustcomm_readable_code[] = {
-       [ USTCOMM_CODE_OFFSET(LTTNG_UST_OK) ] = "Success",
-       [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR) ] = "Unknown error",
-       [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_NOENT) ] = "No entry",
-       [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_EXIST) ] = "Object already exists",
-       [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_INVAL) ] = "Invalid argument",
-       [ 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",
-       [ 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.",
-};
-
-/*
- * lttng_ust_strerror
- * @code: must be a negative value of enum lttng_ust_error_code (or 0).
- *
- * Returns a ptr to a string representing a human readable error code from the
- * ustcomm_return_code enum.
- */
-const char *lttng_ust_strerror(int code)
-{
-       code = -code;
-
-       if (code < LTTNG_UST_OK || code >= LTTNG_UST_ERR_NR)
-               code = LTTNG_UST_ERR;
-
-       return ustcomm_readable_code[USTCOMM_CODE_OFFSET(code)];
-}
+               const struct lttng_ust_event_field * const *lttng_fields);
 
 /*
  * ustcomm_connect_unix_sock
@@ -827,7 +786,7 @@ error:
  * Returns 0 on success, negative error value on error.
  */
 int ustcomm_send_reg_msg(int sock,
-               enum ustctl_socket_type type,
+               enum lttng_ust_ctl_socket_type type,
                uint32_t bits_per_long,
                uint32_t uint8_t_alignment,
                uint32_t uint16_t_alignment,
@@ -836,7 +795,7 @@ int ustcomm_send_reg_msg(int sock,
                uint32_t long_alignment)
 {
        ssize_t len;
-       struct ustctl_reg_msg reg_msg;
+       struct lttng_ust_ctl_reg_msg reg_msg;
 
        reg_msg.magic = LTTNG_UST_ABI_COMM_MAGIC;
        reg_msg.major = LTTNG_UST_ABI_MAJOR_VERSION;
@@ -883,7 +842,7 @@ ssize_t count_one_type(const struct lttng_ust_type_common *lt)
 
        case lttng_ust_type_dynamic:
        {
-               const struct lttng_ust_event_field **choices;
+               const struct lttng_ust_event_field * const *choices;
                size_t nr_choices;
                int ret;
 
@@ -906,7 +865,7 @@ ssize_t count_one_type(const struct lttng_ust_type_common *lt)
 
 static
 ssize_t count_fields_recursive(size_t nr_fields,
-               const struct lttng_ust_event_field **lttng_fields)
+               const struct lttng_ust_event_field * const *lttng_fields)
 {
        int i;
        ssize_t ret, count = 0;
@@ -954,13 +913,13 @@ int serialize_string_encoding(int32_t *ue,
 {
        switch (le) {
        case lttng_ust_string_encoding_none:
-               *ue = ustctl_encode_none;
+               *ue = lttng_ust_ctl_encode_none;
                break;
        case lttng_ust_string_encoding_UTF8:
-               *ue = ustctl_encode_UTF8;
+               *ue = lttng_ust_ctl_encode_UTF8;
                break;
        case lttng_ust_string_encoding_ASCII:
-               *ue = ustctl_encode_ASCII;
+               *ue = lttng_ust_ctl_encode_ASCII;
                break;
        default:
                return -EINVAL;
@@ -969,7 +928,7 @@ int serialize_string_encoding(int32_t *ue,
 }
 
 static
-int serialize_integer_type(struct ustctl_integer_type *uit,
+int serialize_integer_type(struct lttng_ust_ctl_integer_type *uit,
                const struct lttng_ust_type_integer *lit,
                enum lttng_ust_string_encoding lencoding)
 {
@@ -988,10 +947,10 @@ int serialize_integer_type(struct ustctl_integer_type *uit,
 
 static
 int serialize_dynamic_type(struct lttng_ust_session *session,
-               struct ustctl_field *fields, size_t *iter_output,
+               struct lttng_ust_ctl_field *fields, size_t *iter_output,
                const char *field_name)
 {
-       const struct lttng_ust_event_field **choices;
+       const struct lttng_ust_event_field * const *choices;
        char tag_field_name[LTTNG_UST_ABI_SYM_NAME_LEN];
        const struct lttng_ust_type_common *tag_type;
        const struct lttng_ust_event_field *tag_field_generic;
@@ -999,7 +958,7 @@ int serialize_dynamic_type(struct lttng_ust_session *session,
                .name = tag_field_name,
                .nowrite = 0,
        };
-       struct ustctl_field *uf;
+       struct lttng_ust_ctl_field *uf;
        size_t nr_choices, i;
        int ret;
 
@@ -1026,7 +985,7 @@ int serialize_dynamic_type(struct lttng_ust_session *session,
 
        strncpy(uf->name, field_name, LTTNG_UST_ABI_SYM_NAME_LEN);
        uf->name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0';
-       uf->type.atype = ustctl_atype_variant;
+       uf->type.atype = lttng_ust_ctl_atype_variant;
        uf->type.u.variant_nestable.nr_choices = nr_choices;
        strncpy(uf->type.u.variant_nestable.tag_name,
                tag_field_name,
@@ -1047,22 +1006,22 @@ int serialize_dynamic_type(struct lttng_ust_session *session,
 
 static
 int serialize_one_type(struct lttng_ust_session *session,
-               struct ustctl_field *fields, size_t *iter_output,
+               struct lttng_ust_ctl_field *fields, size_t *iter_output,
                const char *field_name, const struct lttng_ust_type_common *lt,
                enum lttng_ust_string_encoding parent_encoding)
 {
        int ret;
 
        /*
-        * Serializing a type (rather than a field) generates a ustctl_field
+        * Serializing a type (rather than a field) generates a lttng_ust_ctl_field
         * entry with 0-length name.
         */
 
        switch (lt->type) {
        case lttng_ust_type_integer:
        {
-               struct ustctl_field *uf = &fields[*iter_output];
-               struct ustctl_type *ut = &uf->type;
+               struct lttng_ust_ctl_field *uf = &fields[*iter_output];
+               struct lttng_ust_ctl_type *ut = &uf->type;
 
                if (field_name) {
                        strncpy(uf->name, field_name, LTTNG_UST_ABI_SYM_NAME_LEN);
@@ -1074,15 +1033,15 @@ int serialize_one_type(struct lttng_ust_session *session,
                                parent_encoding);
                if (ret)
                        return ret;
-               ut->atype = ustctl_atype_integer;
+               ut->atype = lttng_ust_ctl_atype_integer;
                (*iter_output)++;
                break;
        }
        case lttng_ust_type_float:
        {
-               struct ustctl_field *uf = &fields[*iter_output];
-               struct ustctl_type *ut = &uf->type;
-               struct ustctl_float_type *uft;
+               struct lttng_ust_ctl_field *uf = &fields[*iter_output];
+               struct lttng_ust_ctl_type *ut = &uf->type;
+               struct lttng_ust_ctl_float_type *uft;
                const struct lttng_ust_type_float *lft;
 
                if (field_name) {
@@ -1097,14 +1056,14 @@ int serialize_one_type(struct lttng_ust_session *session,
                uft->mant_dig = lft->mant_dig;
                uft->alignment = lft->alignment;
                uft->reverse_byte_order = lft->reverse_byte_order;
-               ut->atype = ustctl_atype_float;
+               ut->atype = lttng_ust_ctl_atype_float;
                (*iter_output)++;
                break;
        }
        case lttng_ust_type_string:
        {
-               struct ustctl_field *uf = &fields[*iter_output];
-               struct ustctl_type *ut = &uf->type;
+               struct lttng_ust_ctl_field *uf = &fields[*iter_output];
+               struct lttng_ust_ctl_type *ut = &uf->type;
                int32_t encoding;
 
                if (field_name) {
@@ -1117,14 +1076,14 @@ int serialize_one_type(struct lttng_ust_session *session,
                if (ret)
                        return ret;
                ut->u.string.encoding = encoding;
-               ut->atype = ustctl_atype_string;
+               ut->atype = lttng_ust_ctl_atype_string;
                (*iter_output)++;
                break;
        }
        case lttng_ust_type_array:
        {
-               struct ustctl_field *uf = &fields[*iter_output];
-               struct ustctl_type *ut = &uf->type;
+               struct lttng_ust_ctl_field *uf = &fields[*iter_output];
+               struct lttng_ust_ctl_type *ut = &uf->type;
 
                if (field_name) {
                        strncpy(uf->name, field_name, LTTNG_UST_ABI_SYM_NAME_LEN);
@@ -1132,7 +1091,7 @@ int serialize_one_type(struct lttng_ust_session *session,
                } else {
                        uf->name[0] = '\0';
                }
-               ut->atype = ustctl_atype_array_nestable;
+               ut->atype = lttng_ust_ctl_atype_array_nestable;
                ut->u.array_nestable.length = lttng_ust_get_type_array(lt)->length;
                ut->u.array_nestable.alignment = lttng_ust_get_type_array(lt)->alignment;
                (*iter_output)++;
@@ -1146,8 +1105,8 @@ int serialize_one_type(struct lttng_ust_session *session,
        }
        case lttng_ust_type_sequence:
        {
-               struct ustctl_field *uf = &fields[*iter_output];
-               struct ustctl_type *ut = &uf->type;
+               struct lttng_ust_ctl_field *uf = &fields[*iter_output];
+               struct lttng_ust_ctl_type *ut = &uf->type;
 
                if (field_name) {
                        strncpy(uf->name, field_name, LTTNG_UST_ABI_SYM_NAME_LEN);
@@ -1155,7 +1114,7 @@ int serialize_one_type(struct lttng_ust_session *session,
                } else {
                        uf->name[0] = '\0';
                }
-               ut->atype = ustctl_atype_sequence_nestable;
+               ut->atype = lttng_ust_ctl_atype_sequence_nestable;
                strncpy(ut->u.sequence_nestable.length_name,
                        lttng_ust_get_type_sequence(lt)->length_name,
                        LTTNG_UST_ABI_SYM_NAME_LEN);
@@ -1180,7 +1139,7 @@ int serialize_one_type(struct lttng_ust_session *session,
        }
        case lttng_ust_type_struct:
        {
-               struct ustctl_field *uf = &fields[*iter_output];
+               struct lttng_ust_ctl_field *uf = &fields[*iter_output];
 
                if (field_name) {
                        strncpy(uf->name, field_name, LTTNG_UST_ABI_SYM_NAME_LEN);
@@ -1188,7 +1147,7 @@ int serialize_one_type(struct lttng_ust_session *session,
                } else {
                        uf->name[0] = '\0';
                }
-               uf->type.atype = ustctl_atype_struct_nestable;
+               uf->type.atype = lttng_ust_ctl_atype_struct_nestable;
                uf->type.u.struct_nestable.nr_fields = lttng_ust_get_type_struct(lt)->nr_fields;
                uf->type.u.struct_nestable.alignment = lttng_ust_get_type_struct(lt)->alignment;
                (*iter_output)++;
@@ -1202,8 +1161,8 @@ int serialize_one_type(struct lttng_ust_session *session,
        }
        case lttng_ust_type_enum:
        {
-               struct ustctl_field *uf = &fields[*iter_output];
-               struct ustctl_type *ut = &uf->type;
+               struct lttng_ust_ctl_field *uf = &fields[*iter_output];
+               struct lttng_ust_ctl_type *ut = &uf->type;
 
                if (field_name) {
                        strncpy(uf->name, field_name, LTTNG_UST_ABI_SYM_NAME_LEN);
@@ -1214,7 +1173,7 @@ int serialize_one_type(struct lttng_ust_session *session,
                strncpy(ut->u.enum_nestable.name, lttng_ust_get_type_enum(lt)->desc->name,
                                LTTNG_UST_ABI_SYM_NAME_LEN);
                ut->u.enum_nestable.name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0';
-               ut->atype = ustctl_atype_enum_nestable;
+               ut->atype = lttng_ust_ctl_atype_enum_nestable;
                (*iter_output)++;
 
                ret = serialize_one_type(session, fields, iter_output, NULL,
@@ -1242,7 +1201,7 @@ int serialize_one_type(struct lttng_ust_session *session,
 
 static
 int serialize_one_field(struct lttng_ust_session *session,
-               struct ustctl_field *fields, size_t *iter_output,
+               struct lttng_ust_ctl_field *fields, size_t *iter_output,
                const struct lttng_ust_event_field *lf)
 {
        /* skip 'nowrite' fields */
@@ -1254,15 +1213,15 @@ int serialize_one_field(struct lttng_ust_session *session,
 
 static
 int serialize_fields(struct lttng_ust_session *session,
-               struct ustctl_field *ustctl_fields,
+               struct lttng_ust_ctl_field *lttng_ust_ctl_fields,
                size_t *iter_output, size_t nr_lttng_fields,
-               const struct lttng_ust_event_field **lttng_fields)
+               const struct lttng_ust_event_field * const *lttng_fields)
 {
        int ret;
        size_t i;
 
        for (i = 0; i < nr_lttng_fields; i++) {
-               ret = serialize_one_field(session, ustctl_fields,
+               ret = serialize_one_field(session, lttng_ust_ctl_fields,
                                iter_output, lttng_fields[i]);
                if (ret)
                        return ret;
@@ -1273,11 +1232,11 @@ int serialize_fields(struct lttng_ust_session *session,
 static
 int alloc_serialize_fields(struct lttng_ust_session *session,
                size_t *_nr_write_fields,
-               struct ustctl_field **ustctl_fields,
+               struct lttng_ust_ctl_field **lttng_ust_ctl_fields,
                size_t nr_fields,
-               const struct lttng_ust_event_field **lttng_fields)
+               const struct lttng_ust_event_field * const *lttng_fields)
 {
-       struct ustctl_field *fields;
+       struct lttng_ust_ctl_field *fields;
        int ret;
        size_t iter_output = 0;
        ssize_t nr_write_fields;
@@ -1297,7 +1256,7 @@ int alloc_serialize_fields(struct lttng_ust_session *session,
                goto error_type;
 
        *_nr_write_fields = nr_write_fields;
-       *ustctl_fields = fields;
+       *lttng_ust_ctl_fields = fields;
        return 0;
 
 error_type:
@@ -1306,11 +1265,11 @@ error_type:
 }
 
 static
-int serialize_entries(struct ustctl_enum_entry **_entries,
+int serialize_entries(struct lttng_ust_ctl_enum_entry **_entries,
                size_t nr_entries,
-               const struct lttng_ust_enum_entry **lttng_entries)
+               const struct lttng_ust_enum_entry * const *lttng_entries)
 {
-       struct ustctl_enum_entry *entries;
+       struct lttng_ust_ctl_enum_entry *entries;
        int i;
 
        /* Serialize the entries */
@@ -1318,7 +1277,7 @@ int serialize_entries(struct ustctl_enum_entry **_entries,
        if (!entries)
                return -ENOMEM;
        for (i = 0; i < nr_entries; i++) {
-               struct ustctl_enum_entry *uentry;
+               struct lttng_ust_ctl_enum_entry *uentry;
                const struct lttng_ust_enum_entry *lentry;
 
                uentry = &entries[i];
@@ -1333,7 +1292,7 @@ int serialize_entries(struct ustctl_enum_entry **_entries,
 
                if (lentry->options & LTTNG_UST_ENUM_ENTRY_OPTION_IS_AUTO) {
                        uentry->u.extra.options |=
-                               USTCTL_UST_ENUM_ENTRY_OPTION_IS_AUTO;
+                               LTTNG_UST_CTL_UST_ENUM_ENTRY_OPTION_IS_AUTO;
                }
        }
        *_entries = entries;
@@ -1343,11 +1302,11 @@ int serialize_entries(struct ustctl_enum_entry **_entries,
 static
 int serialize_ctx_fields(struct lttng_ust_session *session,
                size_t *_nr_write_fields,
-               struct ustctl_field **ustctl_fields,
+               struct lttng_ust_ctl_field **lttng_ust_ctl_fields,
                size_t nr_fields,
                struct lttng_ust_ctx_field *lttng_fields)
 {
-       struct ustctl_field *fields;
+       struct lttng_ust_ctl_field *fields;
        int ret;
        size_t i, iter_output = 0;
        ssize_t nr_write_fields;
@@ -1370,7 +1329,7 @@ int serialize_ctx_fields(struct lttng_ust_session *session,
        }
 
        *_nr_write_fields = nr_write_fields;
-       *ustctl_fields = fields;
+       *lttng_ust_ctl_fields = fields;
        return 0;
 
 error_type:
@@ -1389,7 +1348,7 @@ int ustcomm_register_event(int sock,
        int loglevel,
        const char *signature,          /* event signature (input) */
        size_t nr_fields,               /* fields */
-       const struct lttng_ust_event_field **lttng_fields,
+       const struct lttng_ust_event_field * const *lttng_fields,
        const char *model_emf_uri,
        uint32_t *id)                   /* event id (output) */
 {
@@ -1403,12 +1362,12 @@ int ustcomm_register_event(int sock,
                struct ustcomm_notify_event_reply r;
        } reply;
        size_t signature_len, fields_len, model_emf_uri_len;
-       struct ustctl_field *fields = NULL;
+       struct lttng_ust_ctl_field *fields = NULL;
        size_t nr_write_fields = 0;
        int ret;
 
        memset(&msg, 0, sizeof(msg));
-       msg.header.notify_cmd = USTCTL_NOTIFY_CMD_EVENT;
+       msg.header.notify_cmd = LTTNG_UST_CTL_NOTIFY_CMD_EVENT;
        msg.m.session_objd = session_objd;
        msg.m.channel_objd = channel_objd;
        strncpy(msg.m.event_name, event_name, LTTNG_UST_ABI_SYM_NAME_LEN);
@@ -1528,7 +1487,7 @@ 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_ust_enum_entry **lttng_entries,
+       const struct lttng_ust_enum_entry * const *lttng_entries,
        uint64_t *id)
 {
        ssize_t len;
@@ -1541,11 +1500,11 @@ int ustcomm_register_enum(int sock,
                struct ustcomm_notify_enum_reply r;
        } reply;
        size_t entries_len;
-       struct ustctl_enum_entry *entries = NULL;
+       struct lttng_ust_ctl_enum_entry *entries = NULL;
        int ret;
 
        memset(&msg, 0, sizeof(msg));
-       msg.header.notify_cmd = USTCTL_NOTIFY_CMD_ENUM;
+       msg.header.notify_cmd = LTTNG_UST_CTL_NOTIFY_CMD_ENUM;
        msg.m.session_objd = session_objd;
        strncpy(msg.m.enum_name, enum_name, LTTNG_UST_ABI_SYM_NAME_LEN);
        msg.m.enum_name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0';
@@ -1647,12 +1606,12 @@ int ustcomm_register_channel(int sock,
                struct ustcomm_notify_channel_reply r;
        } reply;
        size_t fields_len;
-       struct ustctl_field *fields = NULL;
+       struct lttng_ust_ctl_field *fields = NULL;
        int ret;
        size_t nr_write_fields = 0;
 
        memset(&msg, 0, sizeof(msg));
-       msg.header.notify_cmd = USTCTL_NOTIFY_CMD_CHANNEL;
+       msg.header.notify_cmd = LTTNG_UST_CTL_NOTIFY_CMD_CHANNEL;
        msg.m.session_objd = session_objd;
        msg.m.channel_objd = channel_objd;
 
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