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authorAmar Tumballi <amarts@redhat.com>2012-05-30 19:05:06 +0530
committerAnand Avati <avati@redhat.com>2012-05-30 15:22:25 -0700
commitf2a3291c2fe5a00bca1e4a77a37560ec30cc24bf (patch)
tree7d09f0972d74169da4f1d694ece46ed26cf313a0 /libglusterfs
parent0fd6f1491050a2ac515ecbe8a1100342a3948305 (diff)
logging: change the 'logfile' value in a locked region
'logfile' is a global variable, and it can change if log-rotate command is issued. currently 'fprintf(logfile)' happens in a locked region where as the 'fclose(logfile)' can happen outside the locked region causing racy behavior. Change-Id: I40871e5c365303b7c602e2c302b085d64f6b945f Signed-off-by: Amar Tumballi <amarts@redhat.com> BUG: 826032 Reviewed-on: http://review.gluster.com/3493 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Anand Avati <avati@redhat.com>
Diffstat (limited to 'libglusterfs')
-rw-r--r--libglusterfs/src/logging.c179
1 files changed, 91 insertions, 88 deletions
diff --git a/libglusterfs/src/logging.c b/libglusterfs/src/logging.c
index c47237f82..6e3757e14 100644
--- a/libglusterfs/src/logging.c
+++ b/libglusterfs/src/logging.c
@@ -274,27 +274,27 @@ _gf_log_nomem (const char *domain, const char *file,
tm = localtime (&tv.tv_sec);
+ strftime (timestr, 256, "%Y-%m-%d %H:%M:%S", tm);
+ snprintf (timestr + strlen (timestr), 256 - strlen (timestr),
+ ".%"GF_PRI_SUSECONDS, tv.tv_usec);
+
+ basename = strrchr (file, '/');
+ if (basename)
+ basename++;
+ else
+ basename = file;
+
+ ret = sprintf (msg, "[%s] %s [%s:%d:%s] %s %s: no memory "
+ "available for size (%"GF_PRI_SIZET")",
+ timestr, level_strings[level],
+ basename, line, function, callstr,
+ domain, size);
+ if (-1 == ret) {
+ goto out;
+ }
+
pthread_mutex_lock (&logfile_mutex);
{
- strftime (timestr, 256, "%Y-%m-%d %H:%M:%S", tm);
- snprintf (timestr + strlen (timestr), 256 - strlen (timestr),
- ".%"GF_PRI_SUSECONDS, tv.tv_usec);
-
- basename = strrchr (file, '/');
- if (basename)
- basename++;
- else
- basename = file;
-
- ret = sprintf (msg, "[%s] %s [%s:%d:%s] %s %s: no memory "
- "available for size (%"GF_PRI_SIZET")",
- timestr, level_strings[level],
- basename, line, function, callstr,
- domain, size);
- if (-1 == ret) {
- goto unlock;
- }
-
if (logfile) {
fprintf (logfile, "%s\n", msg);
fflush (logfile);
@@ -310,7 +310,6 @@ _gf_log_nomem (const char *domain, const char *file,
#endif
}
-unlock:
pthread_mutex_unlock (&logfile_mutex);
out:
return ret;
@@ -393,41 +392,41 @@ _gf_log_callingfn (const char *domain, const char *file, const char *function,
tm = localtime (&tv.tv_sec);
- pthread_mutex_lock (&logfile_mutex);
- {
- va_start (ap, fmt);
-
- strftime (timestr, 256, "%Y-%m-%d %H:%M:%S", tm);
- snprintf (timestr + strlen (timestr), 256 - strlen (timestr),
- ".%"GF_PRI_SUSECONDS, tv.tv_usec);
-
- basename = strrchr (file, '/');
- if (basename)
- basename++;
- else
- basename = file;
-
- ret = gf_asprintf (&str1, "[%s] %s [%s:%d:%s] %s %d-%s: ",
- timestr, level_strings[level],
- basename, line, function, callstr,
- ((this->graph) ? this->graph->id:0), domain);
- if (-1 == ret) {
- goto unlock;
- }
+ va_start (ap, fmt);
- ret = vasprintf (&str2, fmt, ap);
- if (-1 == ret) {
- goto unlock;
- }
+ strftime (timestr, 256, "%Y-%m-%d %H:%M:%S", tm);
+ snprintf (timestr + strlen (timestr), 256 - strlen (timestr),
+ ".%"GF_PRI_SUSECONDS, tv.tv_usec);
+
+ basename = strrchr (file, '/');
+ if (basename)
+ basename++;
+ else
+ basename = file;
+
+ ret = gf_asprintf (&str1, "[%s] %s [%s:%d:%s] %s %d-%s: ",
+ timestr, level_strings[level],
+ basename, line, function, callstr,
+ ((this->graph) ? this->graph->id:0), domain);
+ if (-1 == ret) {
+ goto out;
+ }
+
+ ret = vasprintf (&str2, fmt, ap);
+ if (-1 == ret) {
+ goto out;
+ }
- va_end (ap);
+ va_end (ap);
- len = strlen (str1);
- msg = GF_MALLOC (len + strlen (str2) + 1, gf_common_mt_char);
+ len = strlen (str1);
+ msg = GF_MALLOC (len + strlen (str2) + 1, gf_common_mt_char);
- strcpy (msg, str1);
- strcpy (msg + len, str2);
+ strcpy (msg, str1);
+ strcpy (msg + len, str2);
+ pthread_mutex_lock (&logfile_mutex);
+ {
if (logfile) {
fprintf (logfile, "%s\n", msg);
fflush (logfile);
@@ -443,12 +442,11 @@ _gf_log_callingfn (const char *domain, const char *file, const char *function,
#endif
}
-unlock:
pthread_mutex_unlock (&logfile_mutex);
- if (msg) {
+out:
+ if (msg)
GF_FREE (msg);
- }
if (str1)
GF_FREE (str1);
@@ -456,7 +454,6 @@ unlock:
if (str2)
FREE (str2);
-out:
return ret;
}
@@ -527,10 +524,15 @@ _gf_log (const char *domain, const char *file, const char *function, int line,
goto log;
}
- if (logfile)
- fclose (logfile);
+ pthread_mutex_lock (&logfile_mutex);
+ {
+ if (logfile)
+ fclose (logfile);
+
+ gf_log_logfile = logfile = new_logfile;
+ }
+ pthread_mutex_unlock (&logfile_mutex);
- gf_log_logfile = logfile = new_logfile;
}
log:
@@ -540,40 +542,41 @@ log:
tm = localtime (&tv.tv_sec);
- pthread_mutex_lock (&logfile_mutex);
- {
- va_start (ap, fmt);
-
- strftime (timestr, 256, "%Y-%m-%d %H:%M:%S", tm);
- snprintf (timestr + strlen (timestr), 256 - strlen (timestr),
- ".%"GF_PRI_SUSECONDS, tv.tv_usec);
-
- basename = strrchr (file, '/');
- if (basename)
- basename++;
- else
- basename = file;
-
- ret = gf_asprintf (&str1, "[%s] %s [%s:%d:%s] %d-%s: ",
- timestr, level_strings[level],
- basename, line, function,
- ((this->graph)?this->graph->id:0), domain);
- if (-1 == ret) {
- goto unlock;
- }
+ va_start (ap, fmt);
- ret = vasprintf (&str2, fmt, ap);
- if (-1 == ret) {
- goto unlock;
- }
+ strftime (timestr, 256, "%Y-%m-%d %H:%M:%S", tm);
+ snprintf (timestr + strlen (timestr), 256 - strlen (timestr),
+ ".%"GF_PRI_SUSECONDS, tv.tv_usec);
+
+ basename = strrchr (file, '/');
+ if (basename)
+ basename++;
+ else
+ basename = file;
+
+ ret = gf_asprintf (&str1, "[%s] %s [%s:%d:%s] %d-%s: ",
+ timestr, level_strings[level],
+ basename, line, function,
+ ((this->graph)?this->graph->id:0), domain);
+ if (-1 == ret) {
+ goto err;
+ }
+
+ ret = vasprintf (&str2, fmt, ap);
+ if (-1 == ret) {
+ goto err;
+ }
+
+ va_end (ap);
- va_end (ap);
+ len = strlen (str1);
+ msg = GF_MALLOC (len + strlen (str2) + 1, gf_common_mt_char);
- len = strlen (str1);
- msg = GF_MALLOC (len + strlen (str2) + 1, gf_common_mt_char);
+ strcpy (msg, str1);
+ strcpy (msg + len, str2);
- strcpy (msg, str1);
- strcpy (msg + len, str2);
+ pthread_mutex_lock (&logfile_mutex);
+ {
if (logfile) {
fprintf (logfile, "%s\n", msg);
@@ -590,9 +593,9 @@ log:
#endif
}
-unlock:
pthread_mutex_unlock (&logfile_mutex);
+err:
if (msg) {
GF_FREE (msg);
}