logging.c/h: aggressively remove sprintfs()

Try to reduce the number of sprintf() and string copies until we finally
log a log line.

Specifically, do not sprintf separately the timestr string and
do not sprintf/strcpy the appmsgstr separately - just stick it with
the header.
Hoping I did not leak anything or changed the log line formatting.

Also, allocate 4K (GF_LOG_BACKTRACE_SIZE) of memory
dynamically for trace output -
only if trace was actually requested (previously, it was
unconditionally)

In addition, some minor code formatting (unrelated to the above).

updates: bz#1193929
Signed-off-by: Yaniv Kaul <ykaul@redhat.com>

Change-Id: Id2ccc85f9213a2b1c6eaa4a2f58ce043eac1824f

1 files changed, 6 insertions, 6 deletions

diff --git a/libglusterfs/src/glusterfs/logging.h b/libglusterfs/src/glusterfs/logging.h
index 3655b1d11b..31ecbfcbdb 100644
--- a/libglusterfs/src/glusterfs/logging.h
+++ b/libglusterfs/src/glusterfs/logging.h
@@ -98,11 +98,9 @@ typedef enum {
 
 typedef struct gf_log_handle_ {
     pthread_mutex_t logfile_mutex;
-    uint8_t logrotate;
-    uint8_t cmd_history_logrotate;
     gf_loglevel_t loglevel;
-    int gf_log_syslog;
     gf_loglevel_t sys_log_level;
+    int gf_log_syslog;
     char *filename;
     FILE *logfile;
     FILE *gf_log_logfile;
@@ -113,12 +111,14 @@ typedef struct gf_log_handle_ {
     char *ident;
     int log_control_file_found;
     struct list_head lru_queue;
-    uint32_t lru_size;
-    uint32_t lru_cur_size;
-    uint32_t timeout;
     pthread_mutex_t log_buf_lock;
     struct _gf_timer *log_flush_timer;
     int localtime;
+    uint32_t lru_size;
+    uint32_t lru_cur_size;
+    uint32_t timeout;
+    uint8_t logrotate;
+    uint8_t cmd_history_logrotate;
 } gf_log_handle_t;
 
 typedef struct log_buf_ {