By making use of GNU C's cleanup attribute handled by the
VIR_AUTOFREE macro for declaring scalar variables, majority
of the VIR_FREE calls can be dropped, which in turn leads to
getting rid of most of our cleanup sections.
Signed-off-by: Sukrit Bhatnagar
---
src/util/vircgroup.c | 528 ++-
1 file changed, 181 insertions(+), 347 deletions(-)
diff --git a/src/util/vircgroup.c b/src/util/vircgroup.c
index bc5f774..4bb4408 100644
--- a/src/util/vircgroup.c
+++ b/src/util/vircgroup.c
@@ -162,7 +162,7 @@ virCgroupPartitionNeedsEscaping(const char *path)
{
FILE *fp = NULL;
int ret = 0;
-char *line = NULL;
+VIR_AUTOFREE(char *) line = NULL;
size_t buflen;
/* If it starts with 'cgroup.' or a '_' of any
@@ -222,7 +222,6 @@ virCgroupPartitionNeedsEscaping(const char *path)
}
cleanup:
-VIR_FREE(line);
VIR_FORCE_FCLOSE(fp);
return ret;
}
@@ -255,41 +254,40 @@ virCgroupValidateMachineGroup(virCgroupPtr group,
const char *machinename)
{
size_t i;
-bool valid = false;
-char *partname = NULL;
-char *scopename_old = NULL;
-char *scopename_new = NULL;
-char *partmachinename = NULL;
+VIR_AUTOFREE(char *) partname = NULL;
+VIR_AUTOFREE(char *) scopename_old = NULL;
+VIR_AUTOFREE(char *) scopename_new = NULL;
+VIR_AUTOFREE(char *) partmachinename = NULL;
if (virAsprintf(&partname, "%s.libvirt-%s",
name, drivername) < 0)
-goto cleanup;
+return false;
if (virCgroupPartitionEscape(&partname) < 0)
-goto cleanup;
+return false;
if (machinename &&
(virAsprintf(&partmachinename, "%s.libvirt-%s",
machinename, drivername) < 0 ||
virCgroupPartitionEscape(&partmachinename) < 0))
-goto cleanup;
+return false;
if (!(scopename_old = virSystemdMakeScopeName(name, drivername, true)))
-goto cleanup;
+return false;
/* We should keep trying even if this failed */
if (!machinename)
virResetLastError();
else if (!(scopename_new = virSystemdMakeScopeName(machinename,
drivername, false)))
-goto cleanup;
+return false;
if (virCgroupPartitionEscape(&scopename_old) < 0)
-goto cleanup;
+return false;
if (scopename_new &&
virCgroupPartitionEscape(&scopename_new) < 0)
-goto cleanup;
+return false;
for (i = 0; i < VIR_CGROUP_CONTROLLER_LAST; i++) {
char *tmp;
@@ -302,7 +300,7 @@ virCgroupValidateMachineGroup(virCgroupPtr group,
tmp = strrchr(group->controllers[i].placement, '/');
if (!tmp)
-goto cleanup;
+return false;
if (stripEmulatorSuffix &&
(i == VIR_CGROUP_CONTROLLER_CPU ||
@@ -312,7 +310,7 @@ virCgroupValidateMachineGroup(virCgroupPtr group,
*tmp = '\0';
tmp = strrchr(group->controllers[i].placement, '/');
if (!tmp)
-goto cleanup;
+return false;
}
tmp++;
@@ -328,18 +326,11 @@ virCgroupValidateMachineGroup(virCgroupPtr group,
tmp, virCgroupControllerTypeToString(i),
name, NULLSTR(machinename), partname,
scopename_old, NULLSTR(scopename_new));
-goto cleanup;
+return false;
}
}
-valid = true;
-
- cleanup:
-VIR_FREE(partmachinename);
-VIR_FREE(partname);
-VIR_FREE(scopename_old);
-VIR_FREE(scopename_new);
-return valid;
+return true;
}
@@ -377,7 +368,6 @@ virCgroupDetectMountsFromFile(virCgroupPtr group,
FILE *mounts = NULL;
struct mntent entry;
char buf[CGROUP_MAX_VAL];
-char *linksrc = NULL;
int ret = -1;
mounts = fopen(path, "r");
@@ -432,8 +422,9 @@ virCgroupDetectMountsFromFile(virCgroupPtr group,
/* If it is a co-mount it has a filename like "cpu,cpuacct"
* and we must identify the symlink path */
if (checkLinks && strchr(tmp2 + 1, ',')) {
+VIR_AUTOFREE(char *) linksrc = NULL;
+
*tmp2 = '\0';
-VIR_FREE(linksrc);
if (virAsprintf(&linksrc, "%s/%s",
entry.mnt_dir, typestr) < 0)
goto cleanup;
@@ -467,7 +458,6 @@ virCgroupDetectMountsFromFile(virCgroupPtr group,
ret = 0;
cleanup:
-VIR_FREE(linksrc);
VIR_FORCE_FCLOSE(mounts);
return ret;
}
@@ -546,7 +536,7 @@ virCgroupDetectPlacement(virCgroupPtr group,
FILE *mapping = NULL;
char line[1024];
int ret = -1;
-char *procfile;
+VIR_AUTOFREE(char *) procfile = NULL;
VIR_DEBUG("Detecting placement for pid
