#include "config.h"
#include "log.h"
#include "macro.h"
+#include "memory_utils.h"
#include "storage/storage.h"
#include "utils.h"
/* Slurp in a whole file */
static char *read_file(const char *fnam)
{
- FILE *f;
- char *line = NULL, *buf = NULL;
- size_t len = 0, fulllen = 0;
+ __do_free char *line = NULL;
+ __do_fclose FILE *f = NULL;
int linelen;
+ char *buf = NULL;
+ size_t len = 0, fulllen = 0;
f = fopen(fnam, "r");
if (!f)
append_line(&buf, fulllen, line, linelen);
fulllen += linelen;
}
- fclose(f);
- free(line);
return buf;
}
#define __ISOL_CPUS "/sys/devices/system/cpu/isolated"
static bool cg_legacy_filter_and_set_cpus(char *path, bool am_initialized)
{
+ __do_free char *cpulist = NULL, *fpath = NULL, *isolcpus = NULL,
+ *posscpus = NULL;
+ __do_free uint32_t *isolmask = NULL, *possmask = NULL;
int ret;
ssize_t i;
- char *lastslash, *fpath, oldv;
+ char oldv;
+ char *lastslash;
ssize_t maxisol = 0, maxposs = 0;
- char *cpulist = NULL, *isolcpus = NULL, *posscpus = NULL;
- uint32_t *isolmask = NULL, *possmask = NULL;
bool bret = false, flipped_bit = false;
lastslash = strrchr(path, '/');
posscpus = read_file(fpath);
if (!posscpus) {
SYSERROR("Failed to read file \"%s\"", fpath);
- goto on_error;
+ return false;
}
/* Get maximum number of cpus found in possible cpuset. */
maxposs = get_max_cpus(posscpus);
if (maxposs < 0 || maxposs >= INT_MAX - 1)
- goto on_error;
+ return false;
if (!file_exists(__ISOL_CPUS)) {
/* This system doesn't expose isolated cpus. */
DEBUG("The path \""__ISOL_CPUS"\" to read isolated cpus from does not exist");
- cpulist = posscpus;
/* No isolated cpus but we weren't already initialized by
* someone. We should simply copy the parents cpuset.cpus
* values.
*/
if (!am_initialized) {
DEBUG("Copying cpu settings of parent cgroup");
+ cpulist = posscpus;
goto copy_parent;
}
/* No isolated cpus but we were already initialized by someone.
* Nothing more to do for us.
*/
- goto on_success;
+ return true;
}
isolcpus = read_file(__ISOL_CPUS);
if (!isolcpus) {
SYSERROR("Failed to read file \""__ISOL_CPUS"\"");
- goto on_error;
+ return false;
}
if (!isdigit(isolcpus[0])) {
TRACE("No isolated cpus detected");
- cpulist = posscpus;
/* No isolated cpus but we weren't already initialized by
* someone. We should simply copy the parents cpuset.cpus
* values.
*/
if (!am_initialized) {
DEBUG("Copying cpu settings of parent cgroup");
+ cpulist = posscpus;
goto copy_parent;
}
/* No isolated cpus but we were already initialized by someone.
* Nothing more to do for us.
*/
- goto on_success;
+ return true;
}
/* Get maximum number of cpus found in isolated cpuset. */
maxisol = get_max_cpus(isolcpus);
if (maxisol < 0 || maxisol >= INT_MAX - 1)
- goto on_error;
+ return false;
if (maxposs < maxisol)
maxposs = maxisol;
possmask = lxc_cpumask(posscpus, maxposs);
if (!possmask) {
ERROR("Failed to create cpumask for possible cpus");
- goto on_error;
+ return false;
}
isolmask = lxc_cpumask(isolcpus, maxposs);
if (!isolmask) {
ERROR("Failed to create cpumask for isolated cpus");
- goto on_error;
+ return false;
}
for (i = 0; i <= maxposs; i++) {
if (!flipped_bit) {
DEBUG("No isolated cpus present in cpuset");
- goto on_success;
+ return true;
}
DEBUG("Removed isolated cpus from cpuset");
cpulist = lxc_cpumask_to_cpulist(possmask, maxposs);
if (!cpulist) {
ERROR("Failed to create cpu list");
- goto on_error;
+ return false;
}
copy_parent:
*lastslash = oldv;
- free(fpath);
fpath = must_make_path(path, "cpuset.cpus", NULL);
ret = lxc_write_to_file(fpath, cpulist, strlen(cpulist), false, 0666);
+ if (cpulist == posscpus)
+ cpulist = NULL;
if (ret < 0) {
SYSERROR("Failed to write cpu list to \"%s\"", fpath);
- goto on_error;
+ return false;
}
-on_success:
- bret = true;
-
-on_error:
- free(fpath);
-
- free(isolcpus);
- free(isolmask);
-
- if (posscpus != cpulist)
- free(posscpus);
- free(possmask);
-
- free(cpulist);
- return bret;
+ return true;
}
/* Copy contents of parent(@path)/@file to @path/@file */
static bool copy_parent_file(char *path, char *file)
{
+ __do_free char *child_path = NULL, *parent_path = NULL, *value = NULL;
int ret;
- char *fpath, *lastslash, oldv;
+ char oldv;
int len = 0;
- char *value = NULL;
+ char *lastslash = NULL;
lastslash = strrchr(path, '/');
if (!lastslash) {
}
oldv = *lastslash;
*lastslash = '\0';
- fpath = must_make_path(path, file, NULL);
- len = lxc_read_from_file(fpath, NULL, 0);
+ parent_path = must_make_path(path, file, NULL);
+ len = lxc_read_from_file(parent_path, NULL, 0);
if (len <= 0)
goto on_error;
value = must_realloc(NULL, len + 1);
- ret = lxc_read_from_file(fpath, value, len);
+ ret = lxc_read_from_file(parent_path, value, len);
if (ret != len)
goto on_error;
- free(fpath);
*lastslash = oldv;
- fpath = must_make_path(path, file, NULL);
- ret = lxc_write_to_file(fpath, value, len, false, 0666);
+ child_path = must_make_path(path, file, NULL);
+ ret = lxc_write_to_file(child_path, value, len, false, 0666);
if (ret < 0)
- SYSERROR("Failed to write \"%s\" to file \"%s\"", value, fpath);
- free(fpath);
- free(value);
+ SYSERROR("Failed to write \"%s\" to file \"%s\"", value, child_path);
return ret >= 0;
on_error:
- SYSERROR("Failed to read file \"%s\"", fpath);
- free(fpath);
- free(value);
+ SYSERROR("Failed to read file \"%s\"", child_path);
return false;
}
*/
static bool cg_legacy_handle_cpuset_hierarchy(struct hierarchy *h, char *cgname)
{
+ __do_free char *cgpath = NULL, *clonechildrenpath = NULL;
int ret;
char v;
- char *cgpath, *clonechildrenpath, *slash;
+ char *slash;
if (!string_in_list(h->controllers, "cpuset"))
return true;
if (ret < 0) {
if (errno != EEXIST) {
SYSERROR("Failed to create directory \"%s\"", cgpath);
- free(cgpath);
return false;
}
}
clonechildrenpath = must_make_path(cgpath, "cgroup.clone_children", NULL);
/* unified hierarchy doesn't have clone_children */
- if (!file_exists(clonechildrenpath)) {
- free(clonechildrenpath);
- free(cgpath);
+ if (!file_exists(clonechildrenpath))
return true;
- }
ret = lxc_read_from_file(clonechildrenpath, &v, 1);
if (ret < 0) {
SYSERROR("Failed to read file \"%s\"", clonechildrenpath);
- free(clonechildrenpath);
- free(cgpath);
return false;
}
/* Make sure any isolated cpus are removed from cpuset.cpus. */
if (!cg_legacy_filter_and_set_cpus(cgpath, v == '1')) {
SYSERROR("Failed to remove isolated cpus");
- free(clonechildrenpath);
- free(cgpath);
return false;
}
/* Already set for us by someone else. */
if (v == '1') {
DEBUG("\"cgroup.clone_children\" was already set to \"1\"");
- free(clonechildrenpath);
- free(cgpath);
return true;
}
/* copy parent's settings */
if (!copy_parent_file(cgpath, "cpuset.mems")) {
SYSERROR("Failed to copy \"cpuset.mems\" settings");
- free(cgpath);
- free(clonechildrenpath);
return false;
}
- free(cgpath);
ret = lxc_write_to_file(clonechildrenpath, "1", 1, false, 0666);
if (ret < 0) {
/* Set clone_children so children inherit our settings */
SYSERROR("Failed to write 1 to \"%s\"", clonechildrenpath);
- free(clonechildrenpath);
return false;
}
- free(clonechildrenpath);
+
return true;
}
* for legacy hierarchies.
*/
int i;
- char *dup, *p2, *tok;
+ char *p2, *tok;
char *p = line, *sep = ",";
char **aret = NULL;
*p2 = '\0';
if (type == CGROUP_SUPER_MAGIC) {
+ __do_free char *dup = NULL;
+
/* strdup() here for v1 hierarchies. Otherwise
* lxc_iterate_parts() will destroy mountpoints such as
* "/sys/fs/cgroup/cpu,cpuacct".
*/
- dup = strdup(p);
+ dup = must_copy_string(p);
if (!dup)
return NULL;
- lxc_iterate_parts(tok, dup, sep) {
+ lxc_iterate_parts (tok, dup, sep)
must_append_controller(klist, nlist, &aret, tok);
- }
-
- free(dup);
}
*p2 = ' ';
static char **cg_unified_get_controllers(const char *file)
{
- char *buf, *tok;
+ __do_free char *buf = NULL;
+ char *tok;
char *sep = " \t\n";
char **aret = NULL;
aret[newentry] = copy;
}
- free(buf);
return aret;
}
*/
static bool controller_in_clist(char *cgline, char *c)
{
- char *tok, *eol, *tmp;
+ __do_free char *tmp = NULL;
+ char *tok, *eol;
size_t len;
eol = strchr(cgline, ':');
return false;
len = eol - cgline;
- tmp = alloca(len + 1);
+ tmp = must_realloc(NULL, len + 1);
memcpy(tmp, cgline, len);
tmp[len] = '\0';
- lxc_iterate_parts(tok, tmp, ",") {
+ lxc_iterate_parts(tok, tmp, ",")
if (strcmp(tok, c) == 0)
return true;
- }
return false;
}
static int get_existing_subsystems(char ***klist, char ***nlist)
{
- FILE *f;
- char *line = NULL;
+ __do_free char *line = NULL;
+ __do_fclose FILE *f = NULL;
size_t len = 0;
f = fopen("/proc/self/cgroup", "r");
}
}
- free(line);
- fclose(f);
return 0;
}
struct lxc_handler *handler)
{
int len;
- char *pivot_path;
struct lxc_conf *conf = handler->conf;
char pidstr[INTTYPE_TO_STRLEN(pid_t)];
return;
for (int i = 0; ops->hierarchies[i]; i++) {
+ __do_free char *pivot_path = NULL;
int ret;
char *chop;
char pivot_cgroup[] = PIVOT_CGROUP;
*/
if (!cg_legacy_handle_cpuset_hierarchy(h, pivot_cgroup)) {
WARN("Failed to handle legacy cpuset controller");
- goto next;
+ continue;
}
ret = mkdir_p(pivot_path, 0755);
if (ret < 0 && errno != EEXIST) {
SYSWARN("Failed to create cgroup \"%s\"\n", pivot_path);
- goto next;
+ continue;
}
if (chop)
ret = lxc_write_to_file(pivot_path, pidstr, len, false, 0666);
if (ret != 0) {
SYSWARN("Failed to move monitor %s to \"%s\"\n", pidstr, pivot_path);
- goto next;
+ continue;
}
ret = recursive_destroy(h->monitor_full_path);
if (ret < 0)
WARN("Failed to destroy \"%s\"", h->monitor_full_path);
-
- next:
- free(pivot_path);
}
}
static bool cg_unified_create_cgroup(struct hierarchy *h, char *cgname)
{
+ __do_free char *add_controllers = NULL, *cgroup = NULL;
size_t i, parts_len;
char **it;
size_t full_len = 0;
- char *add_controllers = NULL, *cgroup = NULL;
char **parts = NULL;
bool bret = false;
cgroup = must_make_path(h->mountpoint, h->container_base_path, NULL);
for (i = 0; i < parts_len; i++) {
int ret;
- char *target;
+ __do_free char *target = NULL;
cgroup = must_append_path(cgroup, parts[i], NULL);
target = must_make_path(cgroup, "cgroup.subtree_control", NULL);
ret = lxc_write_to_file(target, add_controllers, full_len, false, 0666);
- free(target);
if (ret < 0) {
SYSERROR("Could not enable \"%s\" controllers in the "
"unified cgroup \"%s\"", add_controllers, cgroup);
on_error:
lxc_free_array((void **)parts, free);
- free(add_controllers);
- free(cgroup);
return bret;
}
orig_len = strlen(dir);
do {
+ __do_free char *makeme;
int ret;
size_t cur_len;
- char *makeme;
dir = tmp + strspn(tmp, "/");
tmp = dir + strcspn(dir, "/");
if (ret < 0) {
if ((errno != EEXIST) || (orig_len == cur_len)) {
SYSERROR("Failed to create directory \"%s\"", makeme);
- free(makeme);
return -1;
}
}
- free(makeme);
-
} while (tmp != dir);
return 0;
}
__cgfsng_ops static inline bool cgfsng_monitor_create(struct cgroup_ops *ops,
- struct lxc_handler *handler)
+ struct lxc_handler *handler)
{
- char *monitor_cgroup, *offset, *tmp;
+ __do_free char *monitor_cgroup = NULL;
+ char *offset, *tmp;
int i, idx = 0;
size_t len;
- bool bret = false;
struct lxc_conf *conf = handler->conf;
if (!conf)
- return bret;
+ return false;
if (!ops->hierarchies)
return true;
else
tmp = must_make_path(ops->monitor_pattern, handler->name, NULL);
if (!tmp)
- return bret;
+ return false;
len = strlen(tmp) + 5; /* leave room for -NNN\0 */
monitor_cgroup = must_realloc(tmp, len);
if (idx) {
int ret = snprintf(offset, 5, "-%d", idx);
if (ret < 0 || (size_t)ret >= 5)
- goto on_error;
+ return false;
}
for (i = 0; ops->hierarchies[i]; i++) {
- if (!monitor_create_path_for_hierarchy(ops->hierarchies[i], monitor_cgroup)) {
- ERROR("Failed to create cgroup \"%s\"", ops->hierarchies[i]->monitor_full_path);
+ if (!monitor_create_path_for_hierarchy(ops->hierarchies[i],
+ monitor_cgroup)) {
+ ERROR("Failed to create cgroup \"%s\"",
+ ops->hierarchies[i]->monitor_full_path);
for (int j = 0; j < i; j++)
- remove_path_for_hierarchy(ops->hierarchies[j], monitor_cgroup, true);
+ remove_path_for_hierarchy(ops->hierarchies[j],
+ monitor_cgroup,
+ true);
idx++;
break;
}
} while (ops->hierarchies[i] && idx > 0 && idx < 1000);
- if (idx < 1000) {
- bret = true;
- INFO("The monitor process uses \"%s\" as cgroup", monitor_cgroup);
- }
-
-on_error:
- free(monitor_cgroup);
+ if (idx == 1000)
+ return false;
- return bret;
+ INFO("The monitor process uses \"%s\" as cgroup", monitor_cgroup);
+ return true;
}
/* Try to create the same cgroup in all hierarchies. Start with cgroup_pattern;
__cgfsng_ops static inline bool cgfsng_payload_create(struct cgroup_ops *ops,
struct lxc_handler *handler)
{
+ __do_free char *container_cgroup = NULL, *tmp = NULL;
int i;
size_t len;
- char *container_cgroup, *offset, *tmp;
+ char *offset;
int idx = 0;
struct lxc_conf *conf = handler->conf;
- if (ops->container_cgroup) {
- WARN("cgfsng_create called a second time: %s", ops->container_cgroup);
+ if (ops->container_cgroup)
return false;
- }
if (!conf)
return false;
len = strlen(tmp) + 5; /* leave room for -NNN\0 */
container_cgroup = must_realloc(NULL, len);
(void)strlcpy(container_cgroup, tmp, len);
- free(tmp);
offset = container_cgroup + len - 5;
-again:
- if (idx == 1000) {
- ERROR("Too many conflicting cgroup names");
- goto out_free;
- }
-
- if (idx) {
- int ret;
-
- ret = snprintf(offset, 5, "-%d", idx);
- if (ret < 0 || (size_t)ret >= 5) {
- FILE *f = fopen("/dev/null", "w");
- if (f) {
- fprintf(f, "Workaround for GCC7 bug: "
- "https://gcc.gnu.org/bugzilla/"
- "show_bug.cgi?id=78969");
- fclose(f);
- }
+ do {
+ if (idx) {
+ int ret = snprintf(offset, 5, "-%d", idx);
+ if (ret < 0 || (size_t)ret >= 5)
+ return false;
}
- }
- for (i = 0; ops->hierarchies[i]; i++) {
- if (!container_create_path_for_hierarchy(ops->hierarchies[i], container_cgroup)) {
- ERROR("Failed to create cgroup \"%s\"", ops->hierarchies[i]->container_full_path);
- for (int j = 0; j < i; j++)
- remove_path_for_hierarchy(ops->hierarchies[j], container_cgroup, false);
- idx++;
- goto again;
+ for (i = 0; ops->hierarchies[i]; i++) {
+ if (!container_create_path_for_hierarchy(ops->hierarchies[i],
+ container_cgroup)) {
+ ERROR("Failed to create cgroup \"%s\"",
+ ops->hierarchies[i]->container_full_path);
+ for (int j = 0; j < i; j++)
+ remove_path_for_hierarchy(ops->hierarchies[j],
+ container_cgroup,
+ false);
+ idx++;
+ break;
+ }
}
- }
+ } while (ops->hierarchies[i] && idx > 0 && idx < 1000);
- ops->container_cgroup = container_cgroup;
- INFO("The container uses \"%s\" as cgroup", container_cgroup);
+ if (idx == 1000)
+ return false;
+ INFO("The container process uses \"%s\" as cgroup", container_cgroup);
+ ops->container_cgroup = move_ptr(container_cgroup);
return true;
-
-out_free:
- free(container_cgroup);
-
- return false;
}
__cgfsng_ops static bool __do_cgroup_enter(struct cgroup_ops *ops, pid_t pid,
for (int i = 0; ops->hierarchies[i]; i++) {
int ret;
- char *path;
+ __do_free char *path = NULL;
if (monitor)
path = must_make_path(ops->hierarchies[i]->monitor_full_path,
ret = lxc_write_to_file(path, pidstr, len, false, 0666);
if (ret != 0) {
SYSERROR("Failed to enter cgroup \"%s\"", path);
- free(path);
return false;
}
- free(path);
}
return true;
destuid = 0;
for (i = 0; arg->hierarchies[i]; i++) {
- char *fullpath;
+ __do_free char *fullpath = NULL;
char *path = arg->hierarchies[i]->container_full_path;
ret = chowmod(path, destuid, nsgid, 0775);
if (arg->hierarchies[i]->version == CGROUP_SUPER_MAGIC) {
fullpath = must_make_path(path, "tasks", NULL);
(void)chowmod(fullpath, destuid, nsgid, 0664);
- free(fullpath);
}
fullpath = must_make_path(path, "cgroup.procs", NULL);
(void)chowmod(fullpath, destuid, nsgid, 0664);
- free(fullpath);
if (arg->hierarchies[i]->version != CGROUP2_SUPER_MAGIC)
continue;
for (char **p = arg->hierarchies[i]->cgroup2_chown; p && *p; p++) {
fullpath = must_make_path(path, *p, NULL);
(void)chowmod(fullpath, destuid, nsgid, 0664);
- free(fullpath);
}
}
char *controllerpath, char *cgpath,
const char *container_cgroup)
{
+ __do_free char *sourcepath = NULL;
int ret, remount_flags;
- char *sourcepath;
int flags = MS_BIND;
if (type == LXC_AUTO_CGROUP_RO || type == LXC_AUTO_CGROUP_MIXED) {
ret = mount(sourcepath, cgpath, "cgroup", flags, NULL);
if (ret < 0) {
SYSERROR("Failed to mount \"%s\" onto \"%s\"", h->controllers[0], cgpath);
- free(sourcepath);
return -1;
}
INFO("Mounted \"%s\" onto \"%s\"", h->controllers[0], cgpath);
ret = mount(sourcepath, cgpath, "cgroup", remount_flags, NULL);
if (ret < 0) {
SYSERROR("Failed to remount \"%s\" ro", cgpath);
- free(sourcepath);
return -1;
}
INFO("Remounted %s read-only", cgpath);
}
- free(sourcepath);
INFO("Completed second stage cgroup automounts for \"%s\"", cgpath);
return 0;
}
const char *controllerpath)
{
int ret;
- char *controllers = NULL;
+ __do_free char *controllers = NULL;
char *fstype = "cgroup2";
unsigned long flags = 0;
}
ret = mount("cgroup", controllerpath, fstype, flags, controllers);
- free(controllers);
if (ret < 0) {
SYSERROR("Failed to mount \"%s\" with cgroup filesystem type %s", controllerpath, fstype);
return -1;
struct lxc_handler *handler,
const char *root, int type)
{
+ __do_free char *tmpfspath = NULL;
int i, ret;
- char *tmpfspath = NULL;
bool has_cgns = false, retval = false, wants_force_mount = false;
if (!ops->hierarchies)
goto on_error;
for (i = 0; ops->hierarchies[i]; i++) {
- char *controllerpath, *path2;
+ __do_free char *controllerpath = NULL, *path2 = NULL;
struct hierarchy *h = ops->hierarchies[i];
char *controller = strrchr(h->mountpoint, '/');
controller++;
controllerpath = must_make_path(tmpfspath, controller, NULL);
- if (dir_exists(controllerpath)) {
- free(controllerpath);
+ if (dir_exists(controllerpath))
continue;
- }
ret = mkdir(controllerpath, 0755);
if (ret < 0) {
SYSERROR("Error creating cgroup path: %s", controllerpath);
- free(controllerpath);
goto on_error;
}
* need to mount the cgroups manually.
*/
ret = cg_mount_in_cgroup_namespace(type, h, controllerpath);
- free(controllerpath);
if (ret < 0)
goto on_error;
}
ret = cg_mount_cgroup_full(type, h, controllerpath);
- if (ret < 0) {
- free(controllerpath);
+ if (ret < 0)
goto on_error;
- }
- if (!cg_mount_needs_subdirs(type)) {
- free(controllerpath);
+ if (!cg_mount_needs_subdirs(type))
continue;
- }
path2 = must_make_path(controllerpath, h->container_base_path,
ops->container_cgroup, NULL);
ret = mkdir_p(path2, 0755);
- if (ret < 0) {
- free(controllerpath);
- free(path2);
+ if (ret < 0)
goto on_error;
- }
ret = cg_legacy_mount_controllers(type, h, controllerpath,
path2, ops->container_cgroup);
- free(controllerpath);
- free(path2);
if (ret < 0)
goto on_error;
}
retval = true;
on_error:
- free(tmpfspath);
return retval;
}
static int recursive_count_nrtasks(char *dirname)
{
+ __do_free char *path = NULL;
+ __do_closedir DIR *dir = NULL;
struct dirent *direntp;
- DIR *dir;
int count = 0, ret;
- char *path;
dir = opendir(dirname);
if (!dir)
path = must_make_path(dirname, direntp->d_name, NULL);
if (lstat(path, &mystat))
- goto next;
+ continue;
if (!S_ISDIR(mystat.st_mode))
- goto next;
+ continue;
count += recursive_count_nrtasks(path);
- next:
- free(path);
}
path = must_make_path(dirname, "cgroup.procs", NULL);
ret = lxc_count_file_lines(path);
if (ret != -1)
count += ret;
- free(path);
-
- (void)closedir(dir);
return count;
}
__cgfsng_ops static int cgfsng_nrtasks(struct cgroup_ops *ops)
{
+ __do_free char *path = NULL;
int count;
- char *path;
if (!ops->container_cgroup || !ops->hierarchies)
return -1;
path = must_make_path(ops->hierarchies[0]->container_full_path, NULL);
count = recursive_count_nrtasks(path);
- free(path);
return count;
}
for (i = 0; ops->hierarchies[i]; i++) {
int ret;
- char *fullpath;
+ __do_free char *fullpath = NULL;
fullpath = must_make_path(ops->hierarchies[i]->mountpoint,
ops->hierarchies[i]->container_base_path,
ret = lxc_write_to_file(fullpath, "0", 2, false, 0666);
if (ret != 0) {
SYSERROR("Failed to escape to cgroup \"%s\"", fullpath);
- free(fullpath);
return false;
}
- free(fullpath);
}
return true;
__cgfsng_ops static bool cgfsng_unfreeze(struct cgroup_ops *ops)
{
int ret;
- char *fullpath;
+ __do_free char *fullpath = NULL;
struct hierarchy *h;
h = get_hierarchy(ops, "freezer");
fullpath = must_make_path(h->container_full_path, "freezer.state", NULL);
ret = lxc_write_to_file(fullpath, THAWED, THAWED_LEN, false, 0666);
- free(fullpath);
if (ret < 0)
return false;
const char *lxcpath, const char *pidstr,
size_t pidstr_len, const char *controller)
{
+ __do_free char *base_path = NULL, *container_cgroup = NULL,
+ *full_path = NULL;
int ret;
size_t len;
int fret = -1, idx = 0;
- char *base_path = NULL, *container_cgroup = NULL, *full_path = NULL;
container_cgroup = lxc_cmd_get_cgroup_path(name, lxcpath, controller);
/* not running */
if (ret == 0)
goto on_success;
- free(full_path);
-
len = strlen(base_path) + STRLITERALLEN("/lxc-1000") +
STRLITERALLEN("/cgroup-procs");
full_path = must_realloc(NULL, len + 1);
fret = 0;
on_error:
- free(base_path);
- free(container_cgroup);
- free(full_path);
-
return fret;
}
return false;
for (i = 0; ops->hierarchies[i]; i++) {
- char *path;
+ __do_free char *path = NULL;
char *fullpath = NULL;
struct hierarchy *h = ops->hierarchies[i];
continue;
fullpath = build_full_cgpath_from_monitorpath(h, path, "cgroup.procs");
- free(path);
ret = lxc_write_to_file(fullpath, pidstr, len, false, 0666);
if (ret < 0) {
SYSERROR("Failed to attach %d to %s", (int)pid, fullpath);
- free(fullpath);
return false;
}
- free(fullpath);
}
return true;
char *value, size_t len, const char *name,
const char *lxcpath)
{
- int ret = -1;
- size_t controller_len;
- char *controller, *p, *path;
+ __do_free char *path = NULL;
+ __do_free char *controller = NULL;
+ char *p;
struct hierarchy *h;
+ int ret = -1;
- controller_len = strlen(filename);
- controller = alloca(controller_len + 1);
- (void)strlcpy(controller, filename, controller_len + 1);
-
+ controller = must_copy_string(filename);
p = strchr(controller, '.');
if (p)
*p = '\0';
h = get_hierarchy(ops, controller);
if (h) {
- char *fullpath;
+ __do_free char *fullpath = NULL;
fullpath = build_full_cgpath_from_monitorpath(h, path, filename);
ret = lxc_read_from_file(fullpath, value, len);
- free(fullpath);
}
- free(path);
return ret;
}
const char *filename, const char *value,
const char *name, const char *lxcpath)
{
- int ret = -1;
- size_t controller_len;
- char *controller, *p, *path;
+ __do_free char *path = NULL;
+ __do_free char *controller = NULL;
+ char *p;
struct hierarchy *h;
+ int ret = -1;
- controller_len = strlen(filename);
- controller = alloca(controller_len + 1);
- (void)strlcpy(controller, filename, controller_len + 1);
-
+ controller = must_copy_string(filename);
p = strchr(controller, '.');
if (p)
*p = '\0';
h = get_hierarchy(ops, controller);
if (h) {
- char *fullpath;
+ __do_free char *fullpath = NULL;
fullpath = build_full_cgpath_from_monitorpath(h, path, filename);
ret = lxc_write_to_file(fullpath, value, strlen(value), false, 0666);
- free(fullpath);
}
- free(path);
return ret;
}
*/
static int convert_devpath(const char *invalue, char *dest)
{
+ __do_free char *path = NULL;
int n_parts;
- char *p, *path, type;
+ char *p, type;
unsigned long minor, major;
struct stat sb;
int ret = -EINVAL;
* A ' # comment' would be legal. Technically other text is not
* legal, we could check for that if we cared to.
*/
- for (n_parts = 1, p = path; *p && n_parts < 3; p++) {
+ for (n_parts = 1, p = path; *p; p++) {
if (*p != ' ')
continue;
*p = '\0';
ret = 0;
out:
- free(path);
return ret;
}
static int cg_legacy_set_data(struct cgroup_ops *ops, const char *filename,
const char *value)
{
- size_t len;
- char *fullpath, *p;
+ __do_free char *controller = NULL;
+ __do_free char *fullpath = NULL;
+ char *p;
/* "b|c <2^64-1>:<2^64-1> r|w|m" = 47 chars max */
char converted_value[50];
struct hierarchy *h;
int ret = 0;
- char *controller = NULL;
-
- len = strlen(filename);
- controller = alloca(len + 1);
- (void)strlcpy(controller, filename, len + 1);
+ controller = must_copy_string(filename);
p = strchr(controller, '.');
if (p)
*p = '\0';
fullpath = must_make_path(h->container_full_path, filename, NULL);
ret = lxc_write_to_file(fullpath, value, strlen(value), false, 0666);
- free(fullpath);
return ret;
}
struct lxc_list *cgroup_settings,
bool do_devices)
{
- struct lxc_list *iterator, *next, *sorted_cgroup_settings;
+ __do_free struct lxc_list *sorted_cgroup_settings = NULL;
+ struct lxc_list *iterator, *next;
struct lxc_cgroup *cg;
bool ret = false;
lxc_list_del(iterator);
free(iterator);
}
- free(sorted_cgroup_settings);
+
return ret;
}
return false;
lxc_list_for_each(iterator, cgroup_settings) {
+ __do_free char *fullpath = NULL;
int ret;
- char *fullpath;
struct lxc_cgroup *cg = iterator->elem;
fullpath = must_make_path(h->container_full_path, cg->subsystem, NULL);
ret = lxc_write_to_file(fullpath, cg->value, strlen(cg->value), false, 0666);
- free(fullpath);
if (ret < 0) {
SYSERROR("Failed to set \"%s\" to \"%s\"",
cg->subsystem, cg->value);
static void cg_unified_delegate(char ***delegate)
{
- char *tmp;
+ __do_free char *tmp = NULL;
int idx;
char *standard[] = {"cgroup.subtree_control", "cgroup.threads", NULL};
idx = append_null_to_list((void ***)delegate);
(*delegate)[idx] = must_copy_string(token);
}
- free(tmp);
}
}
static bool cg_hybrid_init(struct cgroup_ops *ops, bool relative,
bool unprivileged)
{
+ __do_free char *basecginfo = NULL;
+ __do_free char *line = NULL;
+ __do_fclose FILE *f = NULL;
int ret;
- char *basecginfo;
- FILE *f;
size_t len = 0;
- char *line = NULL;
char **klist = NULL, **nlist = NULL;
/* Root spawned containers escape the current cgroup, so use init's
ret = get_existing_subsystems(&klist, &nlist);
if (ret < 0) {
ERROR("Failed to retrieve available legacy cgroup controllers");
- free(basecginfo);
return false;
}
f = fopen("/proc/self/mountinfo", "r");
if (!f) {
ERROR("Failed to open \"/proc/self/mountinfo\"");
- free(basecginfo);
return false;
}
free_string_list(klist);
free_string_list(nlist);
- free(basecginfo);
-
- fclose(f);
- free(line);
-
TRACE("Writable cgroup hierarchies:");
lxc_cgfsng_print_hierarchies(ops);
/* Get current cgroup from /proc/self/cgroup for the cgroupfs v2 hierarchy. */
static char *cg_unified_get_current_cgroup(bool relative)
{
- char *basecginfo, *base_cgroup;
+ __do_free char *basecginfo = NULL;
+ char *base_cgroup;
char *copy = NULL;
if (!relative && (geteuid() == 0))
goto cleanup_on_err;
cleanup_on_err:
- free(basecginfo);
if (copy)
trim(copy);
static int cg_unified_init(struct cgroup_ops *ops, bool relative,
bool unprivileged)
{
+ __do_free char *subtree_path = NULL;
int ret;
- char *mountpoint, *subtree_path, *tmp;
+ char *mountpoint;
char **delegatable;
struct hierarchy *new;
char *base_cgroup = NULL;
subtree_path = must_make_path(mountpoint, base_cgroup,
"cgroup.subtree_control", NULL);
delegatable = cg_unified_get_controllers(subtree_path);
- free(subtree_path);
if (!delegatable)
delegatable = cg_unified_make_empty_controller();
if (!delegatable[0])
cg_unified_delegate(&new->cgroup2_chown);
ops->cgroup_layout = CGROUP_LAYOUT_UNIFIED;
+ ops->unified = new;
return CGROUP2_SUPER_MAGIC;
}
tmp = lxc_global_config_value("lxc.cgroup.use");
if (tmp) {
- char *chop, *cur, *pin;
+ __do_free char *pin = NULL;
+ char *chop, *cur;
pin = must_copy_string(tmp);
chop = pin;
- lxc_iterate_parts(cur, chop, ",") {
+ lxc_iterate_parts(cur, chop, ",")
must_append_string(&ops->cgroup_use, cur);
- }
-
- free(pin);
}
ret = cg_unified_init(ops, relative, !lxc_list_empty(&conf->id_map));
projects / mirror_lxc.git / blobdiff