Add proper per-file copyright notices/licenses and top-level license.

[bluesky.git] / bluesky / log.c

diff --git a/bluesky/log.c b/bluesky/log.c
index 5a16238..d20f924 100644 (file)
--- a/bluesky/log.c
+++ b/bluesky/log.c
@@ -3,7 +3,29 @@
  * Copyright (C) 2010  The Regents of the University of California
  * Written by Michael Vrable <mvrable@cs.ucsd.edu>
  *
- * TODO: Licensing
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
  */
 
 #define _GNU_SOURCE
@@ -34,10 +56,6 @@
  * only incompletely written out before a crash, which should only happen for
  * log records that were not considered committed). */
 
-// Rough size limit for a log segment.  This is not a firm limit and there are
-// no absolute guarantees on the size of a log segment.
-#define LOG_SEGMENT_SIZE (1 << 22)
-
 #define HEADER_MAGIC 0x676f4c0a
 #define FOOTER_MAGIC 0x2e435243
 
@@ -482,8 +500,9 @@ static void cloudlog_partial_fetch_start(BlueSkyCacheFile *cachefile,
                                          size_t offset, size_t length)
 {
     g_atomic_int_inc(&cachefile->refcount);
-    g_print("Starting partial fetch of %s from cloud (%zd + %zd)\n",
-            cachefile->filename, offset, length);
+    if (bluesky_verbose)
+        g_print("Starting partial fetch of %s from cloud (%zd + %zd)\n",
+                cachefile->filename, offset, length);
     BlueSkyStoreAsync *async = bluesky_store_async_new(cachefile->fs->store);
     async->op = STORE_OP_GET;
     async->key = g_strdup(cachefile->filename);
@@ -500,13 +519,15 @@ static void cloudlog_partial_fetch_start(BlueSkyCacheFile *cachefile,
 static void cloudlog_partial_fetch_complete(BlueSkyStoreAsync *async,
                                             BlueSkyCacheFile *cachefile)
 {
-    g_print("Fetch of %s from cloud complete, status = %d\n",
-            async->key, async->result);
+    if (bluesky_verbose || async->result != 0)
+        g_print("Fetch of %s from cloud complete, status = %d\n",
+                async->key, async->result);
 
     g_mutex_lock(cachefile->lock);
     if (async->result >= 0) {
         if (async->len == 0) {
-            g_print("Complete object was fetched.\n");
+            if (bluesky_verbose)
+                g_print("Complete object was fetched.\n");
             cachefile->complete = TRUE;
         }
 
@@ -553,7 +574,7 @@ static void cloudlog_partial_fetch_complete(BlueSkyStoreAsync *async,
 
         bluesky_rangeset_free(items);
     } else {
-        g_print("Error fetching from cloud, retrying...\n");
+        g_print("Error fetching %s from cloud, retrying...\n", async->key);
         cloudlog_partial_fetch_start(cachefile, async->start, async->len);
     }
 
@@ -576,7 +597,8 @@ static void cloudlog_fetch_start(BlueSkyCacheFile *cachefile)
 {
     g_atomic_int_inc(&cachefile->refcount);
     cachefile->fetching = TRUE;
-    g_print("Starting fetch of %s from cloud\n", cachefile->filename);
+    if (bluesky_verbose)
+        g_print("Starting fetch of %s from cloud\n", cachefile->filename);
     BlueSkyStoreAsync *async = bluesky_store_async_new(cachefile->fs->store);
     async->op = STORE_OP_GET;
     async->key = g_strdup(cachefile->filename);
@@ -651,7 +673,8 @@ BlueSkyRCStr *bluesky_log_map_object(BlueSkyCloudLog *item, gboolean map_data)
     BlueSkyRCStr *str = NULL;
     int location = 0;
     size_t file_offset = 0, file_size = 0;
-    gboolean range_request = TRUE;
+    gboolean range_request = bluesky_options.full_segment_fetches
+                              ? FALSE : TRUE;
 
     if (page_size == 0) {
         page_size = getpagesize();
@@ -751,7 +774,7 @@ void bluesky_mmap_unref(BlueSkyCacheFile *mmap)
 
     if (g_atomic_int_dec_and_test(&mmap->mapcount)) {
         g_mutex_lock(mmap->lock);
-        if (mmap->addr != NULL) {
+        if (mmap->addr != NULL && g_atomic_int_get(&mmap->mapcount) == 0) {
             if (bluesky_verbose)
                 g_print("Unmapped log segment %d...\n", mmap->log_seq);
             munmap((void *)mmap->addr, mmap->len);