From 9ff48d0982fcb97923955685fe9fa4e0e67cb238 Mon Sep 17 00:00:00 2001
From: Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>
Date: Wed, 2 Jul 2014 00:15:37 -0400
Subject: journal-remote: rework fd and writer reference handling

---
 src/journal-remote/journal-remote-parse.c | 43 ++++++++++++++++++++++++++-----
 1 file changed, 37 insertions(+), 6 deletions(-)

(limited to 'src/journal-remote/journal-remote-parse.c')

diff --git a/src/journal-remote/journal-remote-parse.c b/src/journal-remote/journal-remote-parse.c
index 90d50a7ad0..cdc920eb4c 100644
--- a/src/journal-remote/journal-remote-parse.c
+++ b/src/journal-remote/journal-remote-parse.c
@@ -28,19 +28,48 @@ void source_free(RemoteSource *source) {
         if (!source)
                 return;
 
-        if (source->fd >= 0) {
+        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 %u", source->writer->n_ref);
+        writer_unref(source->writer);
+
         sd_event_source_unref(source->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 int get_line(RemoteSource *source, char **line, size_t *size) {
         ssize_t n, remain;
         char *c = NULL;
@@ -51,6 +80,7 @@ static int get_line(RemoteSource *source, char **line, size_t *size) {
         assert(source->state == STATE_LINE);
         assert(source->filled <= source->size);
         assert(source->buf == NULL || source->size > 0);
+        assert(source->fd >= 0);
 
         while (true) {
                 if (source->buf)
@@ -65,7 +95,7 @@ static int get_line(RemoteSource *source, char **line, size_t *size) {
                         return -E2BIG;
                 }
 
-                if (source->fd < 0)
+                if (source->passive_fd)
                         /* we have to wait for some data to come to us */
                         return -EWOULDBLOCK;
 
@@ -146,10 +176,11 @@ static int fill_fixed_size(RemoteSource *source, void **data, size_t size) {
         assert(source->scanned <= source->filled);
         assert(source->buf != NULL || source->size == 0);
         assert(source->buf == NULL || source->size > 0);
+        assert(source->fd >= 0);
         assert(data);
 
         while(source->filled < size) {
-                if (source->fd < 0)
+                if (source->passive_fd)
                         /* we have to wait for some data to come to us */
                         return -EWOULDBLOCK;
 
@@ -418,11 +449,11 @@ int process_data(RemoteSource *source) {
         }
 }
 
-int process_source(RemoteSource *source, Writer *writer, bool compress, bool seal) {
+int process_source(RemoteSource *source, bool compress, bool seal) {
         int r;
 
         assert(source);
-        assert(writer);
+        assert(source->writer);
 
         r = process_data(source);
         if (r <= 0)
@@ -440,7 +471,7 @@ int process_source(RemoteSource *source, Writer *writer, bool compress, bool sea
         assert(source->iovw.iovec);
         assert(source->iovw.count);
 
-        r = writer_write(writer, &source->iovw, &source->ts, compress, seal);
+        r = writer_write(source->writer, &source->iovw, &source->ts, compress, seal);
         if (r < 0)
                 log_error("Failed to write entry of %zu bytes: %s",
                           iovw_size(&source->iovw), strerror(-r));
-- 
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