MDEV-4133: Review InnoDB tablespace allocation patch by Toshikuni Fukaya. If...

MDEV-4133: Review InnoDB tablespace allocation patch by Toshikuni Fukaya. If innodb_use_posix_fallocate is set we use posix_fallocate call to extent tablespace allocation instead of pwrite.

storage/innobase/fil/fil0fil.cc

@@ -4782,6 +4782,23 @@ retry:
 	start_page_no = space->size;
 	file_start_page_no = space->size - node->size;
 
+#ifdef HAVE_POSIX_FALLOCATE
+	if (srv_use_posix_fallocate) {
+		ulint n_pages = size_after_extend - start_page_no;
+
+		success = os_file_set_size(node->name, node->handle,
+			n_pages * page_size);
+
+		mutex_enter(&fil_system->mutex);
+		if (success) {
+			node->size += n_pages;
+			space->size += n_pages;
+			os_has_said_disk_full = FALSE;
+		}
+		goto complete_io;
+	}
+#endif
+
 	/* Extend at most 64 pages at a time */
 	buf_size = ut_min(64, size_after_extend - start_page_no) * page_size;
 	buf2 = static_cast<byte*>(mem_alloc(buf_size + page_size));
@@ -4835,10 +4852,15 @@ retry:
 
 	space->size += pages_added;
 	node->size += pages_added;
-	node->being_extended = FALSE;
 
+#ifdef HAVE_POSIX_FALLOCATE
+complete_io:
+	fil_node_complete_io(node, fil_system, OS_FILE_READ);
+#else
 	fil_node_complete_io(node, fil_system, OS_FILE_WRITE);
+#endif
 
+	node->being_extended = FALSE;
 	*actual_size = space->size;
 
 #ifndef UNIV_HOTBACKUP

storage/innobase/handler/ha_innodb.cc

@@ -3197,6 +3197,7 @@ innobase_change_buffering_inited_ok:
 	srv_use_posix_fallocate = (ibool) innobase_use_fallocate;
 #endif
 	srv_use_atomic_writes = (ibool) innobase_use_atomic_writes;
+
 	if (innobase_use_atomic_writes) {
 		fprintf(stderr, "InnoDB: using atomic writes.\n");
 
@@ -3211,13 +3212,13 @@ innobase_change_buffering_inited_ok:
 #ifndef _WIN32
 		if(!innobase_file_flush_method ||
 			!strstr(innobase_file_flush_method, "O_DIRECT")) {
-			innobase_file_flush_method = 
+			innobase_file_flush_method =
 				srv_file_flush_method_str = (char*)"O_DIRECT";
 			fprintf(stderr, "InnoDB: using O_DIRECT due to atomic writes.\n");
 		}
 #endif
 #ifdef HAVE_POSIX_FALLOCATE
-		/* Due to a bug in directFS, using atomics needs  
+		/* Due to a bug in directFS, using atomics needs
 		 * posix_fallocate to extend the file
 		 * pwrite()  past end of the file won't work
 		 */
@@ -16892,7 +16893,11 @@ ib_senderrf(
 	str[size - 1] = 0x0;
 	vsnprintf(str, size, format, args);
 #elif HAVE_VASPRINTF
-	(void) vasprintf(&str, format, args);
+	if (vasprintf(&str, format, args) == -1) {
+		/* In case of failure use a fixed length string */
+		str = static_cast<char*>(malloc(BUFSIZ));
+		my_vsnprintf(str, BUFSIZ, format, args);
+	}
 #else
 	/* Use a fixed length string. */
 	str = static_cast<char*>(malloc(BUFSIZ));
@@ -16968,7 +16973,11 @@ ib_errf(
 	str[size - 1] = 0x0;
 	vsnprintf(str, size, format, args);
 #elif HAVE_VASPRINTF
-	(void) vasprintf(&str, format, args);
+	if (vasprintf(&str, format, args) == -1) {
+		/* In case of failure use a fixed length string */
+		str = static_cast<char*>(malloc(BUFSIZ));
+		my_vsnprintf(str, BUFSIZ, format, args);
+	}
 #else
 	/* Use a fixed length string. */
 	str = static_cast<char*>(malloc(BUFSIZ));
@@ -17002,7 +17011,11 @@ ib_logf(
 	str[size - 1] = 0x0;
 	vsnprintf(str, size, format, args);
 #elif HAVE_VASPRINTF
-	(void) vasprintf(&str, format, args);
+	if (vasprintf(&str, format, args) == -1) {
+		/* In case of failure use a fixed length string */
+		str = static_cast<char*>(malloc(BUFSIZ));
+		my_vsnprintf(str, BUFSIZ, format, args);
+	}
 #else
 	/* Use a fixed length string. */
 	str = static_cast<char*>(malloc(BUFSIZ));

storage/innobase/os/os0file.cc

@@ -2099,6 +2099,23 @@ os_file_set_size(
 
 	current_size = 0;
 
+#ifdef HAVE_POSIX_FALLOCATE
+	if (srv_use_posix_fallocate) {
+
+		if (posix_fallocate(file, current_size, size) == -1) {
+
+			fprintf(stderr, "InnoDB: Error: preallocating file "
+				"space for file \'%s\' failed.  Current size "
+				"%lu, desired size %lu\n",
+				name, current_size, size);
+			os_file_handle_error_no_exit(name, "posix_fallocate", FALSE);
+			return(FALSE);
+		}
+		return(TRUE);
+	}
+#endif
+
+
 	/* Write up to 1 megabyte at a time. */
 	buf_size = ut_min(64, (ulint) (size / UNIV_PAGE_SIZE))
 		* UNIV_PAGE_SIZE;

storage/innobase/row/row0log.cc

@@ -2136,7 +2136,12 @@ corruption:
 		if (index->online_log->head.blocks) {
 #ifdef HAVE_FTRUNCATE
 			/* Truncate the file in order to save space. */
-			ftruncate(index->online_log->fd, 0);
+			if (ftruncate(index->online_log->fd, 0) == -1) {
+				fprintf(stderr, "InnoDB: Error: Truncate of file "
+					"\'%s\' failed with error %d:%s\n",
+					index->name + 1, errno, strerror(errno));
+				goto corruption;
+			}
 #endif /* HAVE_FTRUNCATE */
 			index->online_log->head.blocks
 				= index->online_log->tail.blocks = 0;
@@ -2922,7 +2927,12 @@ corruption:
 		if (index->online_log->head.blocks) {
 #ifdef HAVE_FTRUNCATE
 			/* Truncate the file in order to save space. */
-			ftruncate(index->online_log->fd, 0);
+			if (ftruncate(index->online_log->fd, 0) == -1) {
+				fprintf(stderr, "InnoDB: Error: Truncate of file "
+					"\'%s\' failed with error %d:%s\n",
+					index->name + 1, errno, strerror(errno));
+				goto corruption;
+			}
 #endif /* HAVE_FTRUNCATE */
 			index->online_log->head.blocks
 				= index->online_log->tail.blocks = 0;

storage/xtradb/fil/fil0fil.c

@@ -4938,10 +4938,11 @@ fil_extend_space_to_desired_size(
 
 	mem_free(buf2);
 
-	fil_node_complete_io(node, fil_system, OS_FILE_WRITE);
-
 #ifdef HAVE_POSIX_FALLOCATE
 complete_io:
+	fil_node_complete_io(node, fil_system, OS_FILE_READ);
+#else
+	fil_node_complete_io(node, fil_system, OS_FILE_WRITE);
 #endif
 
 	*actual_size = space->size;