diff options
Diffstat (limited to 'src/journal-remote/journal-remote-parse.c')
| -rw-r--r-- | src/journal-remote/journal-remote-parse.c | 504 |
1 files changed, 0 insertions, 504 deletions
diff --git a/src/journal-remote/journal-remote-parse.c b/src/journal-remote/journal-remote-parse.c deleted file mode 100644 index 5ff05d3ad6..0000000000 --- a/src/journal-remote/journal-remote-parse.c +++ /dev/null @@ -1,504 +0,0 @@ -/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ - -/*** - This file is part of systemd. - - Copyright 2014 Zbigniew Jędrzejewski-Szmek - - systemd is free software; you can redistribute it and/or modify it - under the terms of the GNU Lesser General Public License as published by - the Free Software Foundation; either version 2.1 of the License, or - (at your option) any later version. - - systemd is distributed in the hope that it will be useful, but - WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public License - along with systemd; If not, see <http://www.gnu.org/licenses/>. -***/ - -#include "journal-remote-parse.h" -#include "journald-native.h" - -#define LINE_CHUNK 8*1024u - -void source_free(RemoteSource *source) { - if (!source) - return; - - if (source->fd >= 0 && !source->passive_fd) { - log_debug("Closing fd:%d (%s)", source->fd, source->name); - safe_close(source->fd); - } - - free(source->name); - free(source->buf); - iovw_free_contents(&source->iovw); - - log_debug("Writer ref count %i", source->writer->n_ref); - writer_unref(source->writer); - - sd_event_source_unref(source->event); - sd_event_source_unref(source->buffer_event); - - free(source); -} - -/** - * Initialize zero-filled source with given values. On success, takes - * ownerhship of fd and writer, otherwise does not touch them. - */ -RemoteSource* source_new(int fd, bool passive_fd, char *name, Writer *writer) { - - RemoteSource *source; - - log_debug("Creating source for %sfd:%d (%s)", - passive_fd ? "passive " : "", fd, name); - - assert(fd >= 0); - - source = new0(RemoteSource, 1); - if (!source) - return NULL; - - source->fd = fd; - source->passive_fd = passive_fd; - source->name = name; - source->writer = writer; - - return source; -} - -static char* realloc_buffer(RemoteSource *source, size_t size) { - char *b, *old = source->buf; - - b = GREEDY_REALLOC(source->buf, source->size, size); - if (!b) - return NULL; - - iovw_rebase(&source->iovw, old, source->buf); - - return b; -} - -static int get_line(RemoteSource *source, char **line, size_t *size) { - ssize_t n; - char *c = NULL; - - assert(source); - assert(source->state == STATE_LINE); - assert(source->offset <= source->filled); - assert(source->filled <= source->size); - assert(source->buf == NULL || source->size > 0); - assert(source->fd >= 0); - - while (true) { - if (source->buf) { - size_t start = MAX(source->scanned, source->offset); - - c = memchr(source->buf + start, '\n', - source->filled - start); - if (c != NULL) - break; - } - - source->scanned = source->filled; - if (source->scanned >= DATA_SIZE_MAX) { - log_error("Entry is bigger than %u bytes.", DATA_SIZE_MAX); - return -E2BIG; - } - - if (source->passive_fd) - /* we have to wait for some data to come to us */ - return -EAGAIN; - - /* We know that source->filled is at most DATA_SIZE_MAX, so if - we reallocate it, we'll increase the size at least a bit. */ - assert_cc(DATA_SIZE_MAX < ENTRY_SIZE_MAX); - if (source->size - source->filled < LINE_CHUNK && - !realloc_buffer(source, MIN(source->filled + LINE_CHUNK, ENTRY_SIZE_MAX))) - return log_oom(); - - assert(source->buf); - assert(source->size - source->filled >= LINE_CHUNK || - source->size == ENTRY_SIZE_MAX); - - n = read(source->fd, - source->buf + source->filled, - source->size - source->filled); - if (n < 0) { - if (errno != EAGAIN) - log_error_errno(errno, "read(%d, ..., %zu): %m", - source->fd, - source->size - source->filled); - return -errno; - } else if (n == 0) - return 0; - - source->filled += n; - } - - *line = source->buf + source->offset; - *size = c + 1 - source->buf - source->offset; - source->offset += *size; - - return 1; -} - -int push_data(RemoteSource *source, const char *data, size_t size) { - assert(source); - assert(source->state != STATE_EOF); - - if (!realloc_buffer(source, source->filled + size)) { - log_error("Failed to store received data of size %zu " - "(in addition to existing %zu bytes with %zu filled): %s", - size, source->size, source->filled, strerror(ENOMEM)); - return -ENOMEM; - } - - memcpy(source->buf + source->filled, data, size); - source->filled += size; - - return 0; -} - -static int fill_fixed_size(RemoteSource *source, void **data, size_t size) { - - assert(source); - assert(source->state == STATE_DATA_START || - source->state == STATE_DATA || - source->state == STATE_DATA_FINISH); - assert(size <= DATA_SIZE_MAX); - assert(source->offset <= source->filled); - assert(source->filled <= source->size); - assert(source->buf != NULL || source->size == 0); - assert(source->buf == NULL || source->size > 0); - assert(source->fd >= 0); - assert(data); - - while (source->filled - source->offset < size) { - int n; - - if (source->passive_fd) - /* we have to wait for some data to come to us */ - return -EAGAIN; - - if (!realloc_buffer(source, source->offset + size)) - return log_oom(); - - n = read(source->fd, source->buf + source->filled, - source->size - source->filled); - if (n < 0) { - if (errno != EAGAIN) - log_error_errno(errno, "read(%d, ..., %zu): %m", source->fd, - source->size - source->filled); - return -errno; - } else if (n == 0) - return 0; - - source->filled += n; - } - - *data = source->buf + source->offset; - source->offset += size; - - return 1; -} - -static int get_data_size(RemoteSource *source) { - int r; - void *data; - - assert(source); - assert(source->state == STATE_DATA_START); - assert(source->data_size == 0); - - r = fill_fixed_size(source, &data, sizeof(uint64_t)); - if (r <= 0) - return r; - - source->data_size = le64toh( *(uint64_t *) data ); - if (source->data_size > DATA_SIZE_MAX) { - log_error("Stream declares field with size %zu > DATA_SIZE_MAX = %u", - source->data_size, DATA_SIZE_MAX); - return -EINVAL; - } - if (source->data_size == 0) - log_warning("Binary field with zero length"); - - return 1; -} - -static int get_data_data(RemoteSource *source, void **data) { - int r; - - assert(source); - assert(data); - assert(source->state == STATE_DATA); - - r = fill_fixed_size(source, data, source->data_size); - if (r <= 0) - return r; - - return 1; -} - -static int get_data_newline(RemoteSource *source) { - int r; - char *data; - - assert(source); - assert(source->state == STATE_DATA_FINISH); - - r = fill_fixed_size(source, (void**) &data, 1); - if (r <= 0) - return r; - - assert(data); - if (*data != '\n') { - log_error("expected newline, got '%c'", *data); - return -EINVAL; - } - - return 1; -} - -static int process_dunder(RemoteSource *source, char *line, size_t n) { - const char *timestamp; - int r; - - assert(line); - assert(n > 0); - assert(line[n-1] == '\n'); - - /* XXX: is it worth to support timestamps in extended format? - * We don't produce them, but who knows... */ - - timestamp = startswith(line, "__CURSOR="); - if (timestamp) - /* ignore __CURSOR */ - return 1; - - timestamp = startswith(line, "__REALTIME_TIMESTAMP="); - if (timestamp) { - long long unsigned x; - line[n-1] = '\0'; - r = safe_atollu(timestamp, &x); - if (r < 0) - log_warning("Failed to parse __REALTIME_TIMESTAMP: '%s'", timestamp); - else - source->ts.realtime = x; - return r < 0 ? r : 1; - } - - timestamp = startswith(line, "__MONOTONIC_TIMESTAMP="); - if (timestamp) { - long long unsigned x; - line[n-1] = '\0'; - r = safe_atollu(timestamp, &x); - if (r < 0) - log_warning("Failed to parse __MONOTONIC_TIMESTAMP: '%s'", timestamp); - else - source->ts.monotonic = x; - return r < 0 ? r : 1; - } - - timestamp = startswith(line, "__"); - if (timestamp) { - log_notice("Unknown dunder line %s", line); - return 1; - } - - /* no dunder */ - return 0; -} - -static int process_data(RemoteSource *source) { - int r; - - switch(source->state) { - case STATE_LINE: { - char *line, *sep; - size_t n = 0; - - assert(source->data_size == 0); - - r = get_line(source, &line, &n); - if (r < 0) - return r; - if (r == 0) { - source->state = STATE_EOF; - return r; - } - assert(n > 0); - assert(line[n-1] == '\n'); - - if (n == 1) { - log_trace("Received empty line, event is ready"); - return 1; - } - - r = process_dunder(source, line, n); - if (r != 0) - return r < 0 ? r : 0; - - /* MESSAGE=xxx\n - or - COREDUMP\n - LLLLLLLL0011223344...\n - */ - sep = memchr(line, '=', n); - if (sep) { - /* chomp newline */ - n--; - - r = iovw_put(&source->iovw, line, n); - if (r < 0) - return r; - } else { - /* replace \n with = */ - line[n-1] = '='; - - source->field_len = n; - source->state = STATE_DATA_START; - - /* we cannot put the field in iovec until we have all data */ - } - - log_trace("Received: %.*s (%s)", (int) n, line, sep ? "text" : "binary"); - - return 0; /* continue */ - } - - case STATE_DATA_START: - assert(source->data_size == 0); - - r = get_data_size(source); - // log_debug("get_data_size() -> %d", r); - if (r < 0) - return r; - if (r == 0) { - source->state = STATE_EOF; - return 0; - } - - source->state = source->data_size > 0 ? - STATE_DATA : STATE_DATA_FINISH; - - return 0; /* continue */ - - case STATE_DATA: { - void *data; - char *field; - - assert(source->data_size > 0); - - r = get_data_data(source, &data); - // log_debug("get_data_data() -> %d", r); - if (r < 0) - return r; - if (r == 0) { - source->state = STATE_EOF; - return 0; - } - - assert(data); - - field = (char*) data - sizeof(uint64_t) - source->field_len; - memmove(field + sizeof(uint64_t), field, source->field_len); - - r = iovw_put(&source->iovw, field + sizeof(uint64_t), source->field_len + source->data_size); - if (r < 0) - return r; - - source->state = STATE_DATA_FINISH; - - return 0; /* continue */ - } - - case STATE_DATA_FINISH: - r = get_data_newline(source); - // log_debug("get_data_newline() -> %d", r); - if (r < 0) - return r; - if (r == 0) { - source->state = STATE_EOF; - return 0; - } - - source->data_size = 0; - source->state = STATE_LINE; - - return 0; /* continue */ - default: - assert_not_reached("wtf?"); - } -} - -int process_source(RemoteSource *source, bool compress, bool seal) { - size_t remain, target; - int r; - - assert(source); - assert(source->writer); - - r = process_data(source); - if (r <= 0) - return r; - - /* We have a full event */ - log_trace("Received full event from source@%p fd:%d (%s)", - source, source->fd, source->name); - - if (!source->iovw.count) { - log_warning("Entry with no payload, skipping"); - goto freeing; - } - - assert(source->iovw.iovec); - assert(source->iovw.count); - - r = writer_write(source->writer, &source->iovw, &source->ts, compress, seal); - if (r < 0) - log_error_errno(r, "Failed to write entry of %zu bytes: %m", - iovw_size(&source->iovw)); - else - r = 1; - - freeing: - iovw_free_contents(&source->iovw); - - /* possibly reset buffer position */ - remain = source->filled - source->offset; - - if (remain == 0) /* no brainer */ - source->offset = source->scanned = source->filled = 0; - else if (source->offset > source->size - source->filled && - source->offset > remain) { - memcpy(source->buf, source->buf + source->offset, remain); - source->offset = source->scanned = 0; - source->filled = remain; - } - - target = source->size; - while (target > 16 * LINE_CHUNK && remain < target / 2) - target /= 2; - if (target < source->size) { - char *tmp; - - tmp = realloc(source->buf, target); - if (!tmp) - log_warning("Failed to reallocate buffer to (smaller) size %zu", - target); - else { - log_debug("Reallocated buffer from %zu to %zu bytes", - source->size, target); - source->buf = tmp; - source->size = target; - } - } - - return r; -} |