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cgroup: rearrange code blocks

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Avoid nesting and improve readability.

Signed-off-by: David Ward <david.ward@ll.mit.edu>
Signed-off-by: Daniel Lezcano <dlezcano@fr.ibm.com>
This commit is contained in:
David Ward 2012-05-04 00:50:15 +02:00 committed by Daniel Lezcano
parent f10e7166ab
commit ad08bbb704
1 changed files with 32 additions and 38 deletions
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70
src/lxc/cgroup.c
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@ -157,6 +157,7 @@ static int get_cgroup_mount(const char *subsystem, char *mnt)
struct mntent *mntent;
char initcgroup[MAXPATHLEN];
FILE *file = NULL;
int ret, flags, err = -1;
file = setmntent(MTAB, "r");
if (!file) {
@ -165,32 +166,29 @@ static int get_cgroup_mount(const char *subsystem, char *mnt)
}
while ((mntent = getmntent(file))) {
if (strcmp(mntent->mnt_type, "cgroup"))
continue;
if (!subsystem || hasmntopt_multiple(mntent, subsystem)) {
int ret;
int flags = get_cgroup_flags(mntent);
ret = snprintf(mnt, MAXPATHLEN, "%s%s%s",
mntent->mnt_dir,
get_init_cgroup(subsystem, NULL,
initcgroup),
(flags & CGROUP_NS_CGROUP) ? "" : "/lxc");
if (ret < 0 || ret >= MAXPATHLEN)
goto fail;
fclose(file);
DEBUG("using cgroup mounted at '%s'", mnt);
return 0;
}
if (subsystem && !hasmntopt_multiple(mntent, subsystem))
continue;
flags = get_cgroup_flags(mntent);
ret = snprintf(mnt, MAXPATHLEN, "%s%s%s", mntent->mnt_dir,
get_init_cgroup(subsystem, NULL, initcgroup),
(flags & CGROUP_NS_CGROUP) ? "" : "/lxc");
if (ret < 0 || ret >= MAXPATHLEN)
goto fail;
DEBUG("using cgroup mounted at '%s'", mnt);
err = 0;
goto out;
};
fail:
DEBUG("Failed to find cgroup for %s\n",
subsystem ? subsystem : "(NULL)");
fclose(file);
return -1;
out:
endmntent(file);
return err;
}
int lxc_ns_is_mounted(void)
@ -409,18 +407,17 @@ int lxc_cgroup_create(const char *name, pid_t pid)
}
while ((mntent = getmntent(file))) {
DEBUG("checking '%s' (%s)", mntent->mnt_dir, mntent->mnt_type);
if (!strcmp(mntent->mnt_type, "cgroup")) {
if (strcmp(mntent->mnt_type, "cgroup"))
continue;
INFO("[%d] found cgroup mounted at '%s',opts='%s'",
++found, mntent->mnt_dir, mntent->mnt_opts);
INFO("[%d] found cgroup mounted at '%s',opts='%s'",
++found, mntent->mnt_dir, mntent->mnt_opts);
err = lxc_one_cgroup_create(name, mntent, pid);
if (err)
goto out;
}
err = lxc_one_cgroup_create(name, mntent, pid);
if (err)
goto out;
};
if (!found)
@ -498,7 +495,7 @@ int lxc_cgroup_destroy(const char *name)
{
struct mntent *mntent;
FILE *file = NULL;
int ret, err = -1;
int err = -1;
file = setmntent(MTAB, "r");
if (!file) {
@ -507,18 +504,15 @@ int lxc_cgroup_destroy(const char *name)
}
while ((mntent = getmntent(file))) {
if (!strcmp(mntent->mnt_type, "cgroup")) {
ret = lxc_one_cgroup_destroy(mntent, name);
if (ret) {
fclose(file);
return ret;
}
err = 0;
}
if (strcmp(mntent->mnt_type, "cgroup"))
continue;
err = lxc_one_cgroup_destroy(mntent, name);
if (err)
break;
}
fclose(file);
endmntent(file);
return err;
}
/*