X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=plugins%2Ftext%2Fdmesg%2Fdmesg.c;h=c3fa11452764ad98b8454e426fa07be4ef90f41e;hb=140e6d943ff8f5657db28fbbe24ee8c98b7ca2f9;hp=0f8a6e7646a954196dd0474c3c6d9547801df18a;hpb=d8866baa7f1ae173ac9d9fac0ad55cb28f883cbf;p=babeltrace.git diff --git a/plugins/text/dmesg/dmesg.c b/plugins/text/dmesg/dmesg.c index 0f8a6e76..c3fa1145 100644 --- a/plugins/text/dmesg/dmesg.c +++ b/plugins/text/dmesg/dmesg.c @@ -1,6 +1,6 @@ /* * Copyright 2010-2011 EfficiOS Inc. and Linux Foundation - * Copyright 2017 Philippe Proulx + * Copyright 2017 Philippe Proulx * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal @@ -21,78 +21,270 @@ * SOFTWARE. */ +#define BT_LOG_TAG "PLUGIN-TEXT-DMESG-SRC" +#include "logging.h" + #include +#include +#include #include -#include -#include -#include -#include +#include +#include +#include +#include +#include +#include #include +#define NSEC_PER_USEC 1000UL +#define NSEC_PER_MSEC 1000000UL +#define NSEC_PER_SEC 1000000000ULL +#define USEC_PER_SEC 1000000UL + struct dmesg_component; struct dmesg_notif_iter { struct dmesg_component *dmesg_comp; + struct bt_self_notification_iterator *pc_notif_iter; /* Weak */ + char *linebuf; + size_t linebuf_len; FILE *fp; + struct bt_private_notification *tmp_event_notif; + + enum { + STATE_EMIT_STREAM_BEGINNING, + STATE_EMIT_PACKET_BEGINNING, + STATE_EMIT_EVENT, + STATE_EMIT_PACKET_END, + STATE_EMIT_STREAM_END, + STATE_DONE, + } state; }; struct dmesg_component { struct { GString *path; - bool read_from_stdin; + bt_bool read_from_stdin; + bt_bool no_timestamp; } params; - struct bt_ctf_packet *packet; - struct bt_ctf_event_class *event_class; - struct bt_ctf_stream *stream; - struct bt_clock_class_priority_map *cc_prio_map; + struct bt_private_trace *trace; + struct bt_private_stream_class *stream_class; + struct bt_private_event_class *event_class; + struct bt_private_stream *stream; + struct bt_private_packet *packet; + struct bt_private_clock_class *clock_class; }; static -int check_params(struct dmesg_component *dmesg_comp, struct bt_value *params) +struct bt_private_field_class *create_event_payload_fc(void) { - struct bt_value *read_from_stdin; - struct bt_value *path; - const char *path_str; + struct bt_private_field_class *root_fc = NULL; + struct bt_private_field_class *fc = NULL; + int ret; + + root_fc = bt_private_field_class_structure_create(); + if (!root_fc) { + BT_LOGE_STR("Cannot create an empty structure field class object."); + goto error; + } + + fc = bt_private_field_class_string_create(); + if (!fc) { + BT_LOGE_STR("Cannot create a string field class object."); + goto error; + } + + ret = bt_private_field_class_structure_append_member(root_fc, + "str", fc); + if (ret) { + BT_LOGE("Cannot add `str` member to structure field class: " + "ret=%d", ret); + goto error; + } + + goto end; + +error: + BT_OBJECT_PUT_REF_AND_RESET(root_fc); + +end: + bt_object_put_ref(fc); + return root_fc; +} + +static +int create_meta(struct dmesg_component *dmesg_comp, bool has_ts) +{ + struct bt_private_field_class *fc = NULL; + const char *trace_name = NULL; + gchar *basename = NULL; int ret = 0; - if (!params || !bt_value_is_map(params)) { - fprintf(stderr, "Expecting a map value as parameters.\n"); + dmesg_comp->trace = bt_private_trace_create(); + if (!dmesg_comp->trace) { + BT_LOGE_STR("Cannot create an empty trace object."); goto error; } - read_from_stdin = bt_value_map_get(params, "read-from-stdin"); - if (read_from_stdin) { - if (!bt_value_is_bool(read_from_stdin)) { - fprintf(stderr, "Expecting a boolean value for `read-from-stdin` parameter.\n"); + if (dmesg_comp->params.read_from_stdin) { + trace_name = "STDIN"; + } else { + basename = g_path_get_basename(dmesg_comp->params.path->str); + BT_ASSERT(basename); + + if (strcmp(basename, G_DIR_SEPARATOR_S) != 0 && + strcmp(basename, ".") != 0) { + trace_name = basename; + } + } + + if (trace_name) { + ret = bt_private_trace_set_name(dmesg_comp->trace, trace_name); + if (ret) { + BT_LOGE("Cannot set trace's name: name=\"%s\"", trace_name); goto error; } + } - ret = bt_value_bool_get(read_from_stdin, - &dmesg_comp->params.read_from_stdin); - assert(ret == 0); + dmesg_comp->stream_class = bt_private_stream_class_create( + dmesg_comp->trace); + if (!dmesg_comp->stream_class) { + BT_LOGE_STR("Cannot create a stream class object."); + goto error; } - path = bt_value_map_get(params, "path"); + if (has_ts) { + dmesg_comp->clock_class = bt_private_clock_class_create(); + if (!dmesg_comp->clock_class) { + BT_LOGE_STR("Cannot create clock class."); + goto error; + } + + ret = bt_private_stream_class_set_default_clock_class( + dmesg_comp->stream_class, + bt_private_clock_class_borrow_clock_class( + dmesg_comp->clock_class)); + if (ret) { + BT_LOGE_STR("Cannot set stream class's default clock class."); + goto error; + } + } + + dmesg_comp->event_class = bt_private_event_class_create( + dmesg_comp->stream_class); + if (!dmesg_comp->event_class) { + BT_LOGE_STR("Cannot create an event class object."); + goto error; + } + + ret = bt_private_event_class_set_name(dmesg_comp->event_class, "string"); + if (ret) { + BT_LOGE_STR("Cannot set event class's name."); + goto error; + } + + fc = create_event_payload_fc(); + if (!fc) { + BT_LOGE_STR("Cannot create event payload field class."); + goto error; + } + + ret = bt_private_event_class_set_payload_field_class(dmesg_comp->event_class, fc); + if (ret) { + BT_LOGE_STR("Cannot set event class's event payload field class."); + goto error; + } + + goto end; + +error: + ret = -1; + +end: + bt_object_put_ref(fc); + + if (basename) { + g_free(basename); + } + + return ret; +} + +static +int handle_params(struct dmesg_component *dmesg_comp, struct bt_value *params) +{ + struct bt_value *no_timestamp = NULL; + struct bt_value *path = NULL; + const char *path_str; + int ret = 0; + + no_timestamp = bt_value_map_borrow_entry_value(params, + "no-extract-timestamp"); + if (no_timestamp) { + if (!bt_value_is_bool(no_timestamp)) { + BT_LOGE("Expecting a boolean value for the `no-extract-timestamp` parameter: " + "type=%s", + bt_common_value_type_string( + bt_value_get_type(no_timestamp))); + goto error; + } + + dmesg_comp->params.no_timestamp = + bt_value_bool_get(no_timestamp); + } + + path = bt_value_map_borrow_entry_value(params, "path"); if (path) { if (dmesg_comp->params.read_from_stdin) { - fprintf(stderr, "Cannot specify both `read-from-stdin` and `path` parameters.\n"); + BT_LOGE_STR("Cannot specify both `read-from-stdin` and `path` parameters."); goto error; } if (!bt_value_is_string(path)) { - fprintf(stderr, "Expecting a string value for `path` parameter.\n"); + BT_LOGE("Expecting a string value for the `path` parameter: " + "type=%s", + bt_common_value_type_string( + bt_value_get_type(path))); goto error; } - ret = bt_value_bool_get(path, &path_str); - assert(ret == 0); + path_str = bt_value_string_get(path); g_string_assign(dmesg_comp->params.path, path_str); } else { - if (!dmesg_comp->params.read_from_stdin) { - fprintf(stderr, "Expecting `path` parameter or `read-from-stdin` parameter set to true.\n"); - goto error; - } + dmesg_comp->params.read_from_stdin = true; + } + + goto end; + +error: + ret = -1; + +end: + return ret; +} + +static +int create_packet_and_stream(struct dmesg_component *dmesg_comp) +{ + int ret = 0; + + dmesg_comp->stream = bt_private_stream_create(dmesg_comp->stream_class); + if (!dmesg_comp->stream) { + BT_LOGE_STR("Cannot create stream object."); + goto error; + } + + dmesg_comp->packet = bt_private_packet_create(dmesg_comp->stream); + if (!dmesg_comp->packet) { + BT_LOGE_STR("Cannot create packet object."); + goto error; + } + + ret = bt_private_trace_make_static(dmesg_comp->trace); + if (ret) { + BT_LOGE_STR("Cannot make trace static."); + goto error; } goto end; @@ -101,13 +293,42 @@ error: ret = -1; end: - bt_put(read_from_stdin); - bt_put(path); return ret; } static -int create_stream() +int try_create_meta_stream_packet(struct dmesg_component *dmesg_comp, + bool has_ts) +{ + int ret = 0; + + if (dmesg_comp->trace) { + /* Already created */ + goto end; + } + + ret = create_meta(dmesg_comp, has_ts); + if (ret) { + BT_LOGE("Cannot create metadata objects: dmesg-comp-addr=%p", + dmesg_comp); + goto error; + } + + ret = create_packet_and_stream(dmesg_comp); + if (ret) { + BT_LOGE("Cannot create packet and stream objects: " + "dmesg-comp-addr=%p", dmesg_comp); + goto error; + } + + goto end; + +error: + ret = -1; + +end: + return ret; +} static void destroy_dmesg_component(struct dmesg_component *dmesg_comp) @@ -120,71 +341,507 @@ void destroy_dmesg_component(struct dmesg_component *dmesg_comp) g_string_free(dmesg_comp->params.path, TRUE); } - bt_put(dmesg_comp->packet); - bt_put(dmesg_comp->event_class); - bt_put(dmesg_comp->stream); - bt_put(dmesg_comp->cc_prio_map); + bt_object_put_ref(dmesg_comp->packet); + bt_object_put_ref(dmesg_comp->trace); + bt_object_put_ref(dmesg_comp->stream_class); + bt_object_put_ref(dmesg_comp->event_class); + bt_object_put_ref(dmesg_comp->stream); + bt_object_put_ref(dmesg_comp->clock_class); g_free(dmesg_comp); } +static +enum bt_self_component_status create_port( + struct bt_self_component_source *self_comp) +{ + return bt_self_component_source_add_output_port(self_comp, + "out", NULL, NULL); +} + BT_HIDDEN -enum bt_component_status dmesg_init(struct bt_private_component *priv_comp, +enum bt_self_component_status dmesg_init( + struct bt_self_component_source *self_comp, struct bt_value *params, void *init_method_data) { int ret = 0; struct dmesg_component *dmesg_comp = g_new0(struct dmesg_component, 1); - enum bt_component_status status = BT_COMPONENT_STATUS_OK; + enum bt_self_component_status status = BT_SELF_COMPONENT_STATUS_OK; if (!dmesg_comp) { + BT_LOGE_STR("Failed to allocate one dmesg component structure."); goto error; } dmesg_comp->params.path = g_string_new(NULL); if (!dmesg_comp->params.path) { + BT_LOGE_STR("Failed to allocate a GString."); goto error; } - ret = check_params(dmesg_comp, params); + ret = handle_params(dmesg_comp, params); if (ret) { + BT_LOGE("Invalid parameters: comp-addr=%p", self_comp); goto error; } + if (!dmesg_comp->params.read_from_stdin && + !g_file_test(dmesg_comp->params.path->str, + G_FILE_TEST_IS_REGULAR)) { + BT_LOGE("Input path is not a regular file: " + "comp-addr=%p, path=\"%s\"", self_comp, + dmesg_comp->params.path->str); + goto error; + } + status = create_port(self_comp); + if (status != BT_SELF_COMPONENT_STATUS_OK) { + goto error; + } + bt_self_component_set_data( + bt_self_component_source_borrow_self_component(self_comp), + dmesg_comp); goto end; error: destroy_dmesg_component(dmesg_comp); - status = BT_COMPONENT_STATUS_ERROR; + bt_self_component_set_data( + bt_self_component_source_borrow_self_component(self_comp), + NULL); + + if (status >= 0) { + status = BT_SELF_COMPONENT_STATUS_ERROR; + } end: return status; } BT_HIDDEN -void dmesg_finalize(struct bt_private_component *priv_comp) +void dmesg_finalize(struct bt_self_component_source *self_comp) { + destroy_dmesg_component(bt_self_component_get_data( + bt_self_component_source_borrow_self_component(self_comp))); +} + +static +struct bt_private_notification *create_init_event_notif_from_line( + struct dmesg_notif_iter *notif_iter, + const char *line, const char **new_start) +{ + struct bt_private_event *event; + struct bt_private_notification *notif = NULL; + bool has_timestamp = false; + unsigned long sec, usec, msec; + unsigned int year, mon, mday, hour, min; + uint64_t ts = 0; + int ret = 0; + struct dmesg_component *dmesg_comp = notif_iter->dmesg_comp; + *new_start = line; + + if (dmesg_comp->params.no_timestamp) { + goto skip_ts; + } + + /* Extract time from input line */ + if (sscanf(line, "[%lu.%lu] ", &sec, &usec) == 2) { + ts = (uint64_t) sec * USEC_PER_SEC + (uint64_t) usec; + + /* + * The clock class we use has a 1 GHz frequency: convert + * from µs to ns. + */ + ts *= NSEC_PER_USEC; + has_timestamp = true; + } else if (sscanf(line, "[%u-%u-%u %u:%u:%lu.%lu] ", + &year, &mon, &mday, &hour, &min, + &sec, &msec) == 7) { + time_t ep_sec; + struct tm ti; + + memset(&ti, 0, sizeof(ti)); + ti.tm_year = year - 1900; /* From 1900 */ + ti.tm_mon = mon - 1; /* 0 to 11 */ + ti.tm_mday = mday; + ti.tm_hour = hour; + ti.tm_min = min; + ti.tm_sec = sec; + + ep_sec = bt_timegm(&ti); + if (ep_sec != (time_t) -1) { + ts = (uint64_t) ep_sec * NSEC_PER_SEC + + (uint64_t) msec * NSEC_PER_MSEC; + } + + has_timestamp = true; + } + + if (has_timestamp) { + /* Set new start for the message portion of the line */ + *new_start = strchr(line, ']'); + BT_ASSERT(*new_start); + (*new_start)++; + + if ((*new_start)[0] == ' ') { + (*new_start)++; + } + } + +skip_ts: + /* + * At this point, we know if the stream class's event header + * field class should have a timestamp or not, so we can lazily + * create the metadata, stream, and packet objects. + */ + ret = try_create_meta_stream_packet(dmesg_comp, has_timestamp); + if (ret) { + /* try_create_meta_stream_packet() logs errors */ + goto error; + } + + notif = bt_private_notification_event_create(notif_iter->pc_notif_iter, + dmesg_comp->event_class, dmesg_comp->packet); + if (!notif) { + BT_LOGE_STR("Cannot create event notification."); + goto error; + } + + event = bt_private_notification_event_borrow_event(notif); + BT_ASSERT(event); + + if (dmesg_comp->clock_class) { + bt_private_event_set_default_clock_value(event, ts); + } + + goto end; + +error: + BT_OBJECT_PUT_REF_AND_RESET(notif); + +end: + return notif; +} + +static +int fill_event_payload_from_line(const char *line, + struct bt_private_event *event) +{ + struct bt_private_field *ep_field = NULL; + struct bt_private_field *str_field = NULL; + size_t len; + int ret; + + ep_field = bt_private_event_borrow_payload_field(event); + BT_ASSERT(ep_field); + str_field = bt_private_field_structure_borrow_member_field_by_index( + ep_field, 0); + if (!str_field) { + BT_LOGE_STR("Cannot borrow `timestamp` field from event payload structure field."); + goto error; + } + + len = strlen(line); + if (line[len - 1] == '\n') { + /* Do not include the newline character in the payload */ + len--; + } + + ret = bt_private_field_string_clear(str_field); + if (ret) { + BT_LOGE_STR("Cannot clear string field object."); + goto error; + } + + ret = bt_private_field_string_append_with_length(str_field, line, len); + if (ret) { + BT_LOGE("Cannot append value to string field object: " + "len=%zu", len); + goto error; + } + + goto end; + +error: + ret = -1; + +end: + return ret; +} + +static +struct bt_private_notification *create_notif_from_line( + struct dmesg_notif_iter *dmesg_notif_iter, const char *line) +{ + struct bt_private_event *event = NULL; + struct bt_private_notification *notif = NULL; + const char *new_start; + int ret; + + notif = create_init_event_notif_from_line(dmesg_notif_iter, + line, &new_start); + if (!notif) { + BT_LOGE_STR("Cannot create and initialize event notification from line."); + goto error; + } + + event = bt_private_notification_event_borrow_event(notif); + BT_ASSERT(event); + ret = fill_event_payload_from_line(new_start, event); + if (ret) { + BT_LOGE("Cannot fill event payload field from line: " + "ret=%d", ret); + goto error; + } + + goto end; + +error: + BT_OBJECT_PUT_REF_AND_RESET(notif); + +end: + return notif; +} + +static +void destroy_dmesg_notif_iter(struct dmesg_notif_iter *dmesg_notif_iter) +{ + if (!dmesg_notif_iter) { + return; + } + + if (dmesg_notif_iter->fp && dmesg_notif_iter->fp != stdin) { + if (fclose(dmesg_notif_iter->fp)) { + BT_LOGE_ERRNO("Cannot close input file", "."); + } + } + + bt_object_put_ref(dmesg_notif_iter->tmp_event_notif); + free(dmesg_notif_iter->linebuf); + g_free(dmesg_notif_iter); } BT_HIDDEN -enum bt_notification_iterator_status dmesg_notif_iter_init( - struct bt_private_notification_iterator *priv_notif_iter, - struct bt_private_port *priv_port) +enum bt_self_notification_iterator_status dmesg_notif_iter_init( + struct bt_self_notification_iterator *self_notif_iter, + struct bt_self_component_source *self_comp, + struct bt_self_component_port_output *self_port) { + struct dmesg_component *dmesg_comp; + struct dmesg_notif_iter *dmesg_notif_iter = + g_new0(struct dmesg_notif_iter, 1); + enum bt_self_notification_iterator_status status = + BT_SELF_NOTIFICATION_ITERATOR_STATUS_OK; + + if (!dmesg_notif_iter) { + BT_LOGE_STR("Failed to allocate on dmesg notification iterator structure."); + goto error; + } + + dmesg_comp = bt_self_component_get_data( + bt_self_component_source_borrow_self_component(self_comp)); + BT_ASSERT(dmesg_comp); + dmesg_notif_iter->dmesg_comp = dmesg_comp; + dmesg_notif_iter->pc_notif_iter = self_notif_iter; + + if (dmesg_comp->params.read_from_stdin) { + dmesg_notif_iter->fp = stdin; + } else { + dmesg_notif_iter->fp = fopen(dmesg_comp->params.path->str, "r"); + if (!dmesg_notif_iter->fp) { + BT_LOGE_ERRNO("Cannot open input file in read mode", ": path=\"%s\"", + dmesg_comp->params.path->str); + goto error; + } + } + + bt_self_notification_iterator_set_data(self_notif_iter, + dmesg_notif_iter); + goto end; +error: + destroy_dmesg_notif_iter(dmesg_notif_iter); + bt_self_notification_iterator_set_data(self_notif_iter, NULL); + if (status >= 0) { + status = BT_SELF_NOTIFICATION_ITERATOR_STATUS_ERROR; + } + +end: + return status; } BT_HIDDEN -void dmesg_iterator_finalize( - struct bt_private_notification_iterator *priv_notif_iter) +void dmesg_notif_iter_finalize( + struct bt_self_notification_iterator *priv_notif_iter) +{ + destroy_dmesg_notif_iter(bt_self_notification_iterator_get_data( + priv_notif_iter)); +} + +static +enum bt_self_notification_iterator_status dmesg_notif_iter_next_one( + struct dmesg_notif_iter *dmesg_notif_iter, + struct bt_private_notification **notif) { + ssize_t len; + struct dmesg_component *dmesg_comp; + enum bt_self_notification_iterator_status status = + BT_SELF_NOTIFICATION_ITERATOR_STATUS_OK; + + BT_ASSERT(dmesg_notif_iter); + dmesg_comp = dmesg_notif_iter->dmesg_comp; + BT_ASSERT(dmesg_comp); + + if (dmesg_notif_iter->state == STATE_DONE) { + status = BT_SELF_NOTIFICATION_ITERATOR_STATUS_END; + goto end; + } + + if (dmesg_notif_iter->tmp_event_notif || + dmesg_notif_iter->state == STATE_EMIT_PACKET_END || + dmesg_notif_iter->state == STATE_EMIT_STREAM_END) { + goto handle_state; + } + + while (true) { + const char *ch; + bool only_spaces = true; + + len = bt_getline(&dmesg_notif_iter->linebuf, + &dmesg_notif_iter->linebuf_len, dmesg_notif_iter->fp); + if (len < 0) { + if (errno == EINVAL) { + status = BT_SELF_NOTIFICATION_ITERATOR_STATUS_ERROR; + } else if (errno == ENOMEM) { + status = + BT_SELF_NOTIFICATION_ITERATOR_STATUS_NOMEM; + } else { + if (dmesg_notif_iter->state == STATE_EMIT_STREAM_BEGINNING) { + /* Stream did not even begin */ + status = BT_SELF_NOTIFICATION_ITERATOR_STATUS_END; + goto end; + } else { + /* End current packet now */ + dmesg_notif_iter->state = + STATE_EMIT_PACKET_END; + goto handle_state; + } + } + + goto end; + } + + BT_ASSERT(dmesg_notif_iter->linebuf); + + /* Ignore empty lines, once trimmed */ + for (ch = dmesg_notif_iter->linebuf; *ch != '\0'; ch++) { + if (!isspace(*ch)) { + only_spaces = false; + break; + } + } + if (!only_spaces) { + break; + } + } + + dmesg_notif_iter->tmp_event_notif = create_notif_from_line( + dmesg_notif_iter, dmesg_notif_iter->linebuf); + if (!dmesg_notif_iter->tmp_event_notif) { + BT_LOGE("Cannot create event notification from line: " + "dmesg-comp-addr=%p, line=\"%s\"", dmesg_comp, + dmesg_notif_iter->linebuf); + goto end; + } + +handle_state: + BT_ASSERT(dmesg_comp->trace); + + switch (dmesg_notif_iter->state) { + case STATE_EMIT_STREAM_BEGINNING: + BT_ASSERT(dmesg_notif_iter->tmp_event_notif); + *notif = bt_private_notification_stream_begin_create( + dmesg_notif_iter->pc_notif_iter, dmesg_comp->stream); + dmesg_notif_iter->state = STATE_EMIT_PACKET_BEGINNING; + break; + case STATE_EMIT_PACKET_BEGINNING: + BT_ASSERT(dmesg_notif_iter->tmp_event_notif); + *notif = bt_private_notification_packet_begin_create( + dmesg_notif_iter->pc_notif_iter, dmesg_comp->packet); + dmesg_notif_iter->state = STATE_EMIT_EVENT; + break; + case STATE_EMIT_EVENT: + BT_ASSERT(dmesg_notif_iter->tmp_event_notif); + *notif = dmesg_notif_iter->tmp_event_notif; + dmesg_notif_iter->tmp_event_notif = NULL; + break; + case STATE_EMIT_PACKET_END: + *notif = bt_private_notification_packet_end_create( + dmesg_notif_iter->pc_notif_iter, dmesg_comp->packet); + dmesg_notif_iter->state = STATE_EMIT_STREAM_END; + break; + case STATE_EMIT_STREAM_END: + *notif = bt_private_notification_stream_end_create( + dmesg_notif_iter->pc_notif_iter, dmesg_comp->stream); + dmesg_notif_iter->state = STATE_DONE; + break; + default: + break; + } + + if (!*notif) { + BT_LOGE("Cannot create notification: dmesg-comp-addr=%p", + dmesg_comp); + status = BT_SELF_NOTIFICATION_ITERATOR_STATUS_ERROR; + } + +end: + return status; } BT_HIDDEN -struct bt_notification_iterator_next_return dmesg_notif_iter_next( - struct bt_private_notification_iterator *priv_notif_iter) +enum bt_self_notification_iterator_status dmesg_notif_iter_next( + struct bt_self_notification_iterator *self_notif_iter, + bt_notification_array notifs, uint64_t capacity, + uint64_t *count) { + struct dmesg_notif_iter *dmesg_notif_iter = + bt_self_notification_iterator_get_data( + self_notif_iter); + enum bt_self_notification_iterator_status status = + BT_SELF_NOTIFICATION_ITERATOR_STATUS_OK; + uint64_t i = 0; + + while (i < capacity && + status == BT_SELF_NOTIFICATION_ITERATOR_STATUS_OK) { + struct bt_private_notification *priv_notif = NULL; + + status = dmesg_notif_iter_next_one(dmesg_notif_iter, + &priv_notif); + notifs[i] = bt_private_notification_borrow_notification( + priv_notif); + if (status == BT_SELF_NOTIFICATION_ITERATOR_STATUS_OK) { + i++; + } + } + + if (i > 0) { + /* + * Even if dmesg_notif_iter_next_one() returned + * something else than + * BT_SELF_NOTIFICATION_ITERATOR_STATUS_OK, we + * accumulated notification objects in the output + * notification array, so we need to return + * BT_SELF_NOTIFICATION_ITERATOR_STATUS_OK so that they + * are transfered to downstream. This other status + * occurs again the next time muxer_notif_iter_do_next() + * is called, possibly without any accumulated + * notification, in which case we'll return it. + */ + *count = i; + status = BT_SELF_NOTIFICATION_ITERATOR_STATUS_OK; + } + return status; }