-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
+/* SPDX-License-Identifier: LGPL-2.1+ */
/***
This file is part of systemd.
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
+#include "alloc-util.h"
#include "fd-util.h"
#include "journal-remote-parse.h"
#include "journald-native.h"
+#include "parse-util.h"
#include "string-util.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);
+ journal_importer_cleanup(&source->importer);
log_debug("Writer ref count %i", source->writer->n_ref);
writer_unref(source->writer);
/**
* Initialize zero-filled source with given values. On success, takes
- * ownerhship of fd and writer, otherwise does not touch them.
+ * ownership of fd, name, and writer, otherwise does not touch them.
*/
RemoteSource* source_new(int fd, bool passive_fd, char *name, Writer *writer) {
if (!source)
return NULL;
- source->fd = fd;
- source->passive_fd = passive_fd;
- source->name = name;
+ source->importer.fd = fd;
+ source->importer.passive_fd = passive_fd;
+ source->importer.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);
-
- for (;;) {
- 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);
+ r = journal_importer_process_data(&source->importer);
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);
+ source, source->importer.fd, source->importer.name);
- if (!source->iovw.count) {
+ if (source->importer.iovw.count == 0) {
log_warning("Entry with no payload, skipping");
goto freeing;
}
- assert(source->iovw.iovec);
- assert(source->iovw.count);
+ assert(source->importer.iovw.iovec);
- r = writer_write(source->writer, &source->iovw, &source->ts, compress, seal);
+ r = writer_write(source->writer, &source->importer.iovw, &source->importer.ts, compress, seal);
if (r < 0)
log_error_errno(r, "Failed to write entry of %zu bytes: %m",
- iovw_size(&source->iovw));
+ iovw_size(&source->importer.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;
- }
- }
-
+ journal_importer_drop_iovw(&source->importer);
return r;
}
projects / thirdparty / systemd.git / blobdiff