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src.rivoreo.one / systemd-stable / v243-rc1 / . / src / nspawn / nspawn-oci.c
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/* SPDX-License-Identifier: LGPL-2.1+ */
#include <linux/oom.h>
#if HAVE_SECCOMP
#include <seccomp.h>
#endif
#include "bus-util.h"
#include "cap-list.h"
#include "cpu-set-util.h"
#include "env-util.h"
#include "format-util.h"
#include "fs-util.h"
#include "hostname-util.h"
#include "json.h"
#include "missing_sched.h"
#include "nspawn-oci.h"
#include "path-util.h"
#include "rlimit-util.h"
#if HAVE_SECCOMP
#include "seccomp-util.h"
#endif
#include "stat-util.h"
#include "stdio-util.h"
#include "string-util.h"
#include "strv.h"
#include "user-util.h"
/* TODO:
* OCI runtime tool implementation
* hooks
*
* Spec issues:
*
* How is RLIM_INFINITY supposed to be encoded?
* configured effective caps is bullshit, as execv() corrupts it anyway
* pipes bind mounted is *very* different from pipes newly created, comments regarding bind mount or not are bogus
* annotation values structured? or string?
* configurable file system namespace path, but then also root path? wtf?
* apply sysctl inside of the container? or outside?
* how is unlimited pids tasks limit to be encoded?
* what are the defaults for caps if not specified?
* what are the default uid/gid mappings if one is missing but the other set, or when user ns is on but no namespace configured
* the source field of "mounts" is really weird, as it cannot realistically be relative to the bundle, since we never know if that's what the fs wants
* spec contradicts itself on the mount "type" field, as the example uses "bind" as type, but it's not listed in /proc/filesystem, and is something made up by /bin/mount
* if type of mount is left out, what shall be assumed? "bind"?
* readonly mounts is entirely redundant?
* should escaping be applied when joining mount options with ","?
* devices cgroup support is bogus, "allow" and "deny" on the kernel level is about adding/removing entries, not about access
* spec needs to say that "rwm" devices cgroup combination can't be the empty string
* cgrouspv1 crap: kernel, kernelTCP, swapiness, disableOOMKiller, swap, devices, leafWeight
* general: it shouldn't leak lower level abstractions this obviously
* unmanagable cgroups stuff: realtimeRuntime/realtimePeriod
* needs to say what happense when some option is not specified, i.e. which defautls apply
* no architecture? no personality?
* seccomp example and logic is simply broken: there's no constant "SCMP_ACT_ERRNO".
* spec should say what to do with unknown props
* /bin/mount regarding NFS and FUSE required?
* what does terminal=false mean?
* sysctl inside or outside? whitelisting?
* swapiness typo -> swappiness
*
* Unsupported:
*
* apparmorProfile
* selinuxLabel + mountLabel
* hugepageLimits
* network
* rdma
* intelRdt
* swappiness, disableOOMKiller, kernel, kernelTCP, leafWeight (because it's dead, cgroupsv2 can't do it and hence systemd neither)
*
* Non-slice cgroup paths
* Propagation that is not slave + shared
* more than one uid/gid mapping, mappings with a container base != 0, or non-matching uid/gid mappings
* device cgroups access = false items that are not catchall
* device cgroups matches where minor is specified, but major isn't. similar where major is specified but char/block is not. also, any match that only has a type set that has less than "rwm" set. also, any entry that has none of rwm set.
*
*/
static int oci_unexpected(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
return json_log(v, flags, SYNTHETIC_ERRNO(EINVAL),
"Unexpected OCI element '%s' of type '%s'.", name, json_variant_type_to_string(json_variant_type(v)));
}
static int oci_unsupported(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
return json_log(v, flags, SYNTHETIC_ERRNO(EOPNOTSUPP),
"Unsupported OCI element '%s' of type '%s'.", name, json_variant_type_to_string(json_variant_type(v)));
}
static int oci_terminal(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
Settings *s = userdata;
/* If not specified, or set to true, we'll default to either an interactive or a read-only
* console. If specified as false, we'll forcibly move to "pipe" mode though. */
s->console_mode = json_variant_boolean(v) ? _CONSOLE_MODE_INVALID : CONSOLE_PIPE;
return 0;
}
static int oci_console_dimension(const char *name, JsonVariant *variant, JsonDispatchFlags flags, void *userdata) {
unsigned *u = userdata;
uintmax_t k;
assert(u);
k = json_variant_unsigned(variant);
if (k == 0)
return json_log(variant, flags, SYNTHETIC_ERRNO(ERANGE),
"Console size field '%s' is too small.", strna(name));
if (k > USHRT_MAX) /* TIOCSWINSZ's struct winsize uses "unsigned short" for width and height */
return json_log(variant, flags, SYNTHETIC_ERRNO(ERANGE),
"Console size field '%s' is too large.", strna(name));
*u = (unsigned) k;
return 0;
}
static int oci_console_size(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
static const JsonDispatch table[] = {
{ "height", JSON_VARIANT_UNSIGNED, oci_console_dimension, offsetof(Settings, console_height), JSON_MANDATORY },
{ "width", JSON_VARIANT_UNSIGNED, oci_console_dimension, offsetof(Settings, console_width), JSON_MANDATORY },
{}
};
return json_dispatch(v, table, oci_unexpected, flags, userdata);
}
static int oci_absolute_path(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
char **p = userdata;
const char *n;
assert(p);
n = json_variant_string(v);
if (!path_is_absolute(n))
return json_log(v, flags, SYNTHETIC_ERRNO(EINVAL),
"Path in JSON field '%s' is not absolute: %s", strna(name), n);
return free_and_strdup_warn(p, n);
}
static int oci_env(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
char ***l = userdata;
JsonVariant *e;
int r;
assert(l);
JSON_VARIANT_ARRAY_FOREACH(e, v) {
const char *n;
if (!json_variant_is_string(e))
return json_log(e, flags, SYNTHETIC_ERRNO(EINVAL),
"Environment array contains non-string.");
assert_se(n = json_variant_string(e));
if (!env_assignment_is_valid(n))
return json_log(e, flags, SYNTHETIC_ERRNO(EINVAL),
"Environment assignment not valid: %s", n);
r = strv_extend(l, n);
if (r < 0)
return log_oom();
}
return 0;
}
static int oci_args(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
_cleanup_strv_free_ char **l = NULL;
char ***value = userdata;
JsonVariant *e;
int r;
assert(value);
JSON_VARIANT_ARRAY_FOREACH(e, v) {
const char *n;
if (!json_variant_is_string(e))
return json_log(v, flags, SYNTHETIC_ERRNO(EINVAL),
"Argument is not a string.");
assert_se(n = json_variant_string(e));
r = strv_extend(&l, n);
if (r < 0)
return log_oom();
}
if (strv_isempty(l))
return json_log(v, flags, SYNTHETIC_ERRNO(EINVAL),
"Argument list empty, refusing.");
if (isempty(l[0]))
return json_log(v, flags, SYNTHETIC_ERRNO(EINVAL),
"Executable name is empty, refusing.");
return strv_free_and_replace(*value, l);
}
static int oci_rlimit_type(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
const char *z;
int t, *type = userdata;
assert_se(type);
z = startswith(json_variant_string(v), "RLIMIT_");
if (!z)
return json_log(v, flags, SYNTHETIC_ERRNO(EINVAL),
"rlimit entry's name does not begin with 'RLIMIT_', refusing: %s",
json_variant_string(v));
t = rlimit_from_string(z);
if (t < 0)
return json_log(v, flags, SYNTHETIC_ERRNO(EINVAL),
"rlimit name unknown: %s", json_variant_string(v));
*type = t;
return 0;
}
static int oci_rlimit_value(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
rlim_t z, *value = userdata;
assert(value);
if (json_variant_is_negative(v))
z = RLIM_INFINITY;
else {
if (!json_variant_is_unsigned(v))
return json_log(v, flags, SYNTHETIC_ERRNO(ERANGE),
"rlimits limit not unsigned, refusing.");
z = (rlim_t) json_variant_unsigned(v);
if ((uintmax_t) z != json_variant_unsigned(v))
return json_log(v, flags, SYNTHETIC_ERRNO(EINVAL),
"rlimits limit out of range, refusing.");
}
*value = z;
return 0;
}
static int oci_rlimits(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
Settings *s = userdata;
JsonVariant *e;
int r;
assert(s);
JSON_VARIANT_ARRAY_FOREACH(e, v) {
struct rlimit_data {
int type;
rlim_t soft;
rlim_t hard;
} data = {
.type = -1,
.soft = RLIM_INFINITY,
.hard = RLIM_INFINITY,
};
static const JsonDispatch table[] = {
{ "soft", JSON_VARIANT_NUMBER, oci_rlimit_value, offsetof(struct rlimit_data, soft), JSON_MANDATORY },
{ "hard", JSON_VARIANT_NUMBER, oci_rlimit_value, offsetof(struct rlimit_data, hard), JSON_MANDATORY },
{ "type", JSON_VARIANT_STRING, oci_rlimit_type, offsetof(struct rlimit_data, type), JSON_MANDATORY },
{}
};
r = json_dispatch(e, table, oci_unexpected, flags, &data);
if (r < 0)
return r;
assert(data.type >= 0);
assert(data.type < _RLIMIT_MAX);
if (s->rlimit[data.type])
return json_log(v, flags, SYNTHETIC_ERRNO(EINVAL),
"rlimits array contains duplicate entry, refusing.");
s->rlimit[data.type] = new(struct rlimit, 1);
if (!s->rlimit[data.type])
return log_oom();
*s->rlimit[data.type] = (struct rlimit) {
.rlim_cur = data.soft,
.rlim_max = data.hard,
};
}
return 0;
}
static int oci_capability_array(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
uint64_t *mask = userdata, m = 0;
JsonVariant *e;
JSON_VARIANT_ARRAY_FOREACH(e, v) {
const char *n;
int cap;
if (!json_variant_is_string(e))
return json_log(v, flags, SYNTHETIC_ERRNO(EINVAL),
"Entry in capabilities array is not a string.");
assert_se(n = json_variant_string(e));
cap = capability_from_name(n);
if (cap < 0)
return json_log(v, flags, SYNTHETIC_ERRNO(EINVAL),
"Unknown capability: %s", n);
m |= UINT64_C(1) << cap;
}
if (*mask == (uint64_t) -1)
*mask = m;
else
*mask |= m;
return 0;
}
static int oci_capabilities(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
static const JsonDispatch table[] = {
{ "effective", JSON_VARIANT_ARRAY, oci_capability_array, offsetof(CapabilityQuintet, effective) },
{ "bounding", JSON_VARIANT_ARRAY, oci_capability_array, offsetof(CapabilityQuintet, bounding) },
{ "inheritable", JSON_VARIANT_ARRAY, oci_capability_array, offsetof(CapabilityQuintet, inheritable) },
{ "permitted", JSON_VARIANT_ARRAY, oci_capability_array, offsetof(CapabilityQuintet, permitted) },
{ "ambient", JSON_VARIANT_ARRAY, oci_capability_array, offsetof(CapabilityQuintet, ambient) },
{}
};
Settings *s = userdata;
int r;
assert(s);
r = json_dispatch(v, table, oci_unexpected, flags, &s->full_capabilities);
if (r < 0)
return r;
if (s->full_capabilities.bounding != (uint64_t) -1) {
s->capability = s->full_capabilities.bounding;
s->drop_capability = ~s->full_capabilities.bounding;
}
return 0;
}
static int oci_oom_score_adj(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
Settings *s = userdata;
intmax_t k;
assert(s);
k = json_variant_integer(v);
if (k < OOM_SCORE_ADJ_MIN || k > OOM_SCORE_ADJ_MAX)
return json_log(v, flags, SYNTHETIC_ERRNO(EINVAL),
"oomScoreAdj value out of range: %ji", k);
s->oom_score_adjust = (int) k;
s->oom_score_adjust_set = true;
return 0;
}
static int oci_uid_gid(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
uid_t *uid = userdata, u;
uintmax_t k;
assert(uid);
assert_cc(sizeof(uid_t) == sizeof(gid_t));
k = json_variant_unsigned(v);
u = (uid_t) k;
if ((uintmax_t) u != k)
return json_log(v, flags, SYNTHETIC_ERRNO(EINVAL),
"UID/GID out of range: %ji", k);
if (!uid_is_valid(u))
return json_log(v, flags, SYNTHETIC_ERRNO(EINVAL),
"UID/GID is not valid: " UID_FMT, u);
*uid = u;
return 0;
}
static int oci_supplementary_gids(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
Settings *s = userdata;
JsonVariant *e;
int r;
assert(s);
JSON_VARIANT_ARRAY_FOREACH(e, v) {
gid_t gid, *a;
if (!json_variant_is_unsigned(e))
return json_log(v, flags, SYNTHETIC_ERRNO(EINVAL),
"Supplementary GID entry is not a UID.");
r = oci_uid_gid(name, e, flags, &gid);
if (r < 0)
return r;
a = reallocarray(s->supplementary_gids, s->n_supplementary_gids + 1, sizeof(gid_t));
if (!a)
return log_oom();
s->supplementary_gids = a;
s->supplementary_gids[s->n_supplementary_gids++] = gid;
}
return 0;
}
static int oci_user(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
static const JsonDispatch table[] = {
{ "uid", JSON_VARIANT_UNSIGNED, oci_uid_gid, offsetof(Settings, uid), JSON_MANDATORY },
{ "gid", JSON_VARIANT_UNSIGNED, oci_uid_gid, offsetof(Settings, gid), JSON_MANDATORY },
{ "additionalGids", JSON_VARIANT_ARRAY, oci_supplementary_gids, 0, 0 },
{}
};
return json_dispatch(v, table, oci_unexpected, flags, userdata);
}
static int oci_process(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
static const JsonDispatch table[] = {
{ "terminal", JSON_VARIANT_BOOLEAN, oci_terminal, 0, 0 },
{ "consoleSize", JSON_VARIANT_OBJECT, oci_console_size, 0, 0 },
{ "cwd", JSON_VARIANT_STRING, oci_absolute_path, offsetof(Settings, working_directory), 0 },
{ "env", JSON_VARIANT_ARRAY, oci_env, offsetof(Settings, environment), 0 },
{ "args", JSON_VARIANT_ARRAY, oci_args, offsetof(Settings, parameters), 0 },
{ "rlimits", JSON_VARIANT_ARRAY, oci_rlimits, 0, 0 },
{ "apparmorProfile", JSON_VARIANT_STRING, oci_unsupported, 0, JSON_PERMISSIVE },
{ "capabilities", JSON_VARIANT_OBJECT, oci_capabilities, 0, 0 },
{ "noNewPrivileges", JSON_VARIANT_BOOLEAN, json_dispatch_boolean, offsetof(Settings, no_new_privileges), 0 },
{ "oomScoreAdj", JSON_VARIANT_INTEGER, oci_oom_score_adj, 0, 0 },
{ "selinuxLabel", JSON_VARIANT_STRING, oci_unsupported, 0, JSON_PERMISSIVE },
{ "user", JSON_VARIANT_OBJECT, oci_user, 0, 0 },
{}
};
return json_dispatch(v, table, oci_unexpected, flags, userdata);
}
static int oci_root(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
static const JsonDispatch table[] = {
{ "path", JSON_VARIANT_STRING, json_dispatch_string, offsetof(Settings, root) },
{ "readonly", JSON_VARIANT_BOOLEAN, json_dispatch_boolean, offsetof(Settings, read_only) },
{}
};
return json_dispatch(v, table, oci_unexpected, flags, userdata);
}
static int oci_hostname(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
Settings *s = userdata;
const char *n;
assert(s);
assert_se(n = json_variant_string(v));
if (!hostname_is_valid(n, false))
return json_log(v, flags, SYNTHETIC_ERRNO(EINVAL),
"Hostname string is not a valid hostname: %s", n);
return free_and_strdup_warn(&s->hostname, n);
}
static bool oci_exclude_mount(const char *path) {
/* Returns "true" for all mounts we insist to mount on our own, and hence ignore the OCI data. */
if (PATH_IN_SET(path,
"/dev",
"/dev/mqueue",
"/dev/pts",
"/dev/shm",
"/proc",
"/proc/acpi",
"/proc/apm",
"/proc/asound",
"/proc/bus",
"/proc/fs",
"/proc/irq",
"/proc/kallsyms",
"/proc/kcore",
"/proc/keys",
"/proc/scsi",
"/proc/sys",
"/proc/sys/net",
"/proc/sysrq-trigger",
"/proc/timer_list",
"/run",
"/sys",
"/sys",
"/sys/fs/selinux",
"/tmp"))
return true;
/* Similar, skip the whole /sys/fs/cgroups subtree */
if (path_startswith(path, "/sys/fs/cgroup"))
return true;
return false;
}
typedef struct oci_mount_data {
char *destination;
char *source;
char *type;
char **options;
} oci_mount_data;
static void cleanup_oci_mount_data(oci_mount_data *data) {
free(data->destination);
free(data->source);
strv_free(data->options);
free(data->type);
}
static int oci_mounts(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
Settings *s = userdata;
JsonVariant *e;
int r;
assert(s);
JSON_VARIANT_ARRAY_FOREACH(e, v) {
static const JsonDispatch table[] = {
{ "destination", JSON_VARIANT_STRING, oci_absolute_path, offsetof(oci_mount_data, destination), JSON_MANDATORY },
{ "source", JSON_VARIANT_STRING, json_dispatch_string, offsetof(oci_mount_data, source), 0 },
{ "options", JSON_VARIANT_ARRAY, json_dispatch_strv, offsetof(oci_mount_data, options), 0, },
{ "type", JSON_VARIANT_STRING, json_dispatch_string, offsetof(oci_mount_data, type), 0 },
{}
};
_cleanup_free_ char *joined_options = NULL;
CustomMount *m;
_cleanup_(cleanup_oci_mount_data) oci_mount_data data = {};
r = json_dispatch(e, table, oci_unexpected, flags, &data);
if (r < 0)
return r;
if (!path_is_absolute(data.destination))
return json_log(e, flags, SYNTHETIC_ERRNO(EINVAL),
"Mount destination not an absolute path: %s", data.destination);
if (oci_exclude_mount(data.destination))
continue;
if (data.options) {
joined_options = strv_join(data.options, ",");
if (!joined_options)
return log_oom();
}
if (!data.type || streq(data.type, "bind")) {
if (data.source && !path_is_absolute(data.source)) {
char *joined;
joined = path_join(s->bundle, data.source);
if (!joined)
return log_oom();
free_and_replace(data.source, joined);
}
data.type = mfree(data.type);
m = custom_mount_add(&s->custom_mounts, &s->n_custom_mounts, CUSTOM_MOUNT_BIND);
} else
m = custom_mount_add(&s->custom_mounts, &s->n_custom_mounts, CUSTOM_MOUNT_ARBITRARY);
if (!m)
return log_oom();
m->destination = TAKE_PTR(data.destination);
m->source = TAKE_PTR(data.source);
m->options = TAKE_PTR(joined_options);
m->type_argument = TAKE_PTR(data.type);
}
return 0;
}
static int oci_namespace_type(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
unsigned long *nsflags = userdata;
const char *n;
assert(nsflags);
assert_se(n = json_variant_string(v));
/* We don't use namespace_flags_from_string() here, as the OCI spec uses slightly different names than the
* kernel here. */
if (streq(n, "pid"))
*nsflags = CLONE_NEWPID;
else if (streq(n, "network"))
*nsflags = CLONE_NEWNET;
else if (streq(n, "mount"))
*nsflags = CLONE_NEWNS;
else if (streq(n, "ipc"))
*nsflags = CLONE_NEWIPC;
else if (streq(n, "uts"))
*nsflags = CLONE_NEWUTS;
else if (streq(n, "user"))
*nsflags = CLONE_NEWUSER;
else if (streq(n, "cgroup"))
*nsflags = CLONE_NEWCGROUP;
else
return json_log(v, flags, SYNTHETIC_ERRNO(EINVAL),
"Unknown cgroup type, refusing: %s", n);
return 0;
}
static int oci_namespaces(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
Settings *s = userdata;
unsigned long n = 0;
JsonVariant *e;
int r;
assert_se(s);
JSON_VARIANT_ARRAY_FOREACH(e, v) {
struct namespace_data {
unsigned long type;
char *path;
} data = {};
static const JsonDispatch table[] = {
{ "type", JSON_VARIANT_STRING, oci_namespace_type, offsetof(struct namespace_data, type), JSON_MANDATORY },
{ "path", JSON_VARIANT_STRING, oci_absolute_path, offsetof(struct namespace_data, path), 0 },
{}
};
r = json_dispatch(e, table, oci_unexpected, flags, &data);
if (r < 0) {
free(data.path);
return r;
}
if (data.path) {
if (data.type != CLONE_NEWNET) {
free(data.path);
return json_log(e, flags, SYNTHETIC_ERRNO(EOPNOTSUPP),
"Specifying namespace path for non-network namespace is not supported.");
}
if (s->network_namespace_path) {
free(data.path);
return json_log(e, flags, SYNTHETIC_ERRNO(EINVAL),
"Network namespace path specified more than once, refusing.");
}
free(s->network_namespace_path);
s->network_namespace_path = data.path;
}
if (FLAGS_SET(n, data.type)) {
return json_log(e, flags, SYNTHETIC_ERRNO(EINVAL),
"Duplicate namespace specification, refusing.");
}
n |= data.type;
}
if (!FLAGS_SET(n, CLONE_NEWNS))
return json_log(v, flags, SYNTHETIC_ERRNO(EOPNOTSUPP),
"Containers without file system namespace aren't supported.");
s->private_network = FLAGS_SET(n, CLONE_NEWNET);
s->userns_mode = FLAGS_SET(n, CLONE_NEWUSER) ? USER_NAMESPACE_FIXED : USER_NAMESPACE_NO;
s->use_cgns = FLAGS_SET(n, CLONE_NEWCGROUP);
s->clone_ns_flags = n & (CLONE_NEWIPC|CLONE_NEWPID|CLONE_NEWUTS);
return 0;
}
static int oci_uid_gid_range(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
uid_t *uid = userdata, u;
uintmax_t k;
assert(uid);
assert_cc(sizeof(uid_t) == sizeof(gid_t));
/* This is very much like oci_uid_gid(), except the checks are a bit different, as this is a UID range rather
* than a specific UID, and hence (uid_t) -1 has no special significance. OTOH a range of zero makes no
* sense. */
k = json_variant_unsigned(v);
u = (uid_t) k;
if ((uintmax_t) u != k)
return json_log(v, flags, SYNTHETIC_ERRNO(ERANGE),
"UID/GID out of range: %ji", k);
if (u == 0)
return json_log(v, flags, SYNTHETIC_ERRNO(ERANGE),
"UID/GID range can't be zero.");
*uid = u;
return 0;
}
static int oci_uid_gid_mappings(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
struct mapping_data {
uid_t host_id;
uid_t container_id;
uid_t range;
} data = {
.host_id = UID_INVALID,
.container_id = UID_INVALID,
.range = 0,
};
static const JsonDispatch table[] = {
{ "containerID", JSON_VARIANT_UNSIGNED, oci_uid_gid, offsetof(struct mapping_data, container_id), JSON_MANDATORY },
{ "hostID", JSON_VARIANT_UNSIGNED, oci_uid_gid, offsetof(struct mapping_data, host_id), JSON_MANDATORY },
{ "size", JSON_VARIANT_UNSIGNED, oci_uid_gid_range, offsetof(struct mapping_data, range), JSON_MANDATORY },
{}
};
Settings *s = userdata;
JsonVariant *e;
int r;
assert(s);
if (json_variant_elements(v) == 0)
return 0;
if (json_variant_elements(v) > 1)
return json_log(v, flags, SYNTHETIC_ERRNO(EOPNOTSUPP),
"UID/GID mappings with more than one entry are not supported.");
assert_se(e = json_variant_by_index(v, 0));
r = json_dispatch(e, table, oci_unexpected, flags, &data);
if (r < 0)
return r;
if (data.host_id + data.range < data.host_id ||
data.container_id + data.range < data.container_id)
return json_log(v, flags, SYNTHETIC_ERRNO(EINVAL),
"UID/GID range goes beyond UID/GID validity range, refusing.");
if (data.container_id != 0)
return json_log(v, flags, SYNTHETIC_ERRNO(EOPNOTSUPP),
"UID/GID mappings with a non-zero container base are not supported.");
if (data.range < 0x10000)
json_log(v, flags|JSON_WARNING, 0,
"UID/GID mapping with less than 65536 UID/GIDS set up, you are looking for trouble.");
if (s->uid_range != UID_INVALID &&
(s->uid_shift != data.host_id || s->uid_range != data.range))
return json_log(v, flags, SYNTHETIC_ERRNO(EOPNOTSUPP),
"Non-matching UID and GID mappings are not supported.");
s->uid_shift = data.host_id;
s->uid_range = data.range;
return 0;
}
static int oci_device_type(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
mode_t *mode = userdata;
const char *t;
assert(mode);
assert_se(t = json_variant_string(v));
if (STR_IN_SET(t, "c", "u"))
*mode = (*mode & ~S_IFMT) | S_IFCHR;
else if (streq(t, "b"))
*mode = (*mode & ~S_IFMT) | S_IFBLK;
else if (streq(t, "p"))
*mode = (*mode & ~S_IFMT) | S_IFIFO;
else
return json_log(v, flags, SYNTHETIC_ERRNO(EINVAL),
"Unknown device type: %s", t);
return 0;
}
static int oci_device_major(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
unsigned *u = userdata;
uintmax_t k;
assert_se(u);
k = json_variant_unsigned(v);
if (!DEVICE_MAJOR_VALID(k))
return json_log(v, flags, SYNTHETIC_ERRNO(ERANGE),
"Device major %ji out of range.", k);
*u = (unsigned) k;
return 0;
}
static int oci_device_minor(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
unsigned *u = userdata;
uintmax_t k;
assert_se(u);
k = json_variant_unsigned(v);
if (!DEVICE_MINOR_VALID(k))
return json_log(v, flags, SYNTHETIC_ERRNO(ERANGE),
"Device minor %ji out of range.", k);
*u = (unsigned) k;
return 0;
}
static int oci_device_file_mode(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
mode_t *mode = userdata, m;
uintmax_t k;
assert(mode);
k = json_variant_unsigned(v);
m = (mode_t) k;
if ((m & ~07777) != 0 || (uintmax_t) m != k)
return json_log(v, flags, SYNTHETIC_ERRNO(ERANGE),
"fileMode out of range, refusing.");
*mode = m;
return 0;
}
static int oci_devices(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
Settings *s = userdata;
JsonVariant *e;
int r;
assert(s);
JSON_VARIANT_ARRAY_FOREACH(e, v) {
static const JsonDispatch table[] = {
{ "type", JSON_VARIANT_STRING, oci_device_type, offsetof(DeviceNode, mode), JSON_MANDATORY },
{ "path", JSON_VARIANT_STRING, oci_absolute_path, offsetof(DeviceNode, path), JSON_MANDATORY },
{ "major", JSON_VARIANT_UNSIGNED, oci_device_major, offsetof(DeviceNode, major), 0 },
{ "minor", JSON_VARIANT_UNSIGNED, oci_device_minor, offsetof(DeviceNode, minor), 0 },
{ "fileMode", JSON_VARIANT_UNSIGNED, oci_device_file_mode, offsetof(DeviceNode, mode), 0 },
{ "uid", JSON_VARIANT_UNSIGNED, oci_uid_gid, offsetof(DeviceNode, uid), 0 },
{ "gid", JSON_VARIANT_UNSIGNED, oci_uid_gid, offsetof(DeviceNode, gid), 0 },
{}
};
DeviceNode *node, *nodes;
nodes = reallocarray(s->extra_nodes, s->n_extra_nodes + 1, sizeof(DeviceNode));
if (!nodes)
return log_oom();
s->extra_nodes = nodes;
node = nodes + s->n_extra_nodes;
*node = (DeviceNode) {
.uid = UID_INVALID,
.gid = GID_INVALID,
.major = (unsigned) -1,
.minor = (unsigned) -1,
.mode = 0644,
};
r = json_dispatch(e, table, oci_unexpected, flags, node);
if (r < 0)
goto fail_element;
if (S_ISCHR(node->mode) || S_ISBLK(node->mode)) {
_cleanup_free_ char *path = NULL;
if (node->major == (unsigned) -1 || node->minor == (unsigned) -1) {
r = json_log(e, flags, SYNTHETIC_ERRNO(EINVAL),
"Major/minor required when device node is device node");
goto fail_element;
}
/* Suppress a couple of implicit device nodes */
r = device_path_make_canonical(node->mode, makedev(node->major, node->minor), &path);
if (r < 0)
json_log(e, flags|JSON_DEBUG, 0, "Failed to resolve device node %u:%u, ignoring: %m", node->major, node->minor);
else {
if (PATH_IN_SET(path,
"/dev/null",
"/dev/zero",
"/dev/full",
"/dev/random",
"/dev/urandom",
"/dev/tty",
"/dev/net/tun",
"/dev/ptmx",
"/dev/pts/ptmx",
"/dev/console")) {
json_log(e, flags|JSON_DEBUG, 0, "Ignoring devices item for device '%s', as it is implicitly created anyway.", path);
free(node->path);
continue;
}
}
}
s->n_extra_nodes++;
continue;
fail_element:
free(node->path);
return r;
}
return 0;
}
static int oci_cgroups_path(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
_cleanup_free_ char *slice = NULL, *backwards = NULL;
Settings *s = userdata;
const char *p;
int r;
assert(s);
assert_se(p = json_variant_string(v));
r = cg_path_get_slice(p, &slice);
if (r < 0)
return json_log(v, flags, r, "Couldn't derive slice unit name from path '%s': %m", p);
r = cg_slice_to_path(slice, &backwards);
if (r < 0)
return json_log(v, flags, r, "Couldn't convert slice unit name '%s' back to path: %m", slice);
if (!path_equal(backwards, p))
return json_log(v, flags, SYNTHETIC_ERRNO(EINVAL),
"Control group path '%s' does not refer to slice unit, refusing.", p);
free_and_replace(s->slice, slice);
return 0;
}
static int oci_cgroup_device_type(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
mode_t *mode = userdata;
const char *n;
assert_se(n = json_variant_string(v));
if (streq(n, "c"))
*mode = S_IFCHR;
else if (streq(n, "b"))
*mode = S_IFBLK;
else
return json_log(v, flags, SYNTHETIC_ERRNO(EINVAL),
"Control group device type unknown: %s", n);
return 0;
}
struct device_data {
bool allow;
bool r;
bool w;
bool m;
mode_t type;
unsigned major;
unsigned minor;
};
static int oci_cgroup_device_access(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
struct device_data *d = userdata;
bool r = false, w = false, m = false;
const char *s;
size_t i;
assert_se(s = json_variant_string(v));
for (i = 0; s[i]; i++)
if (s[i] == 'r')
r = true;
else if (s[i] == 'w')
w = true;
else if (s[i] == 'm')
m = true;
else
return json_log(v, flags, SYNTHETIC_ERRNO(EINVAL),
"Unknown device access character '%c'.", s[i]);
d->r = r;
d->w = w;
d->m = m;
return 0;
}
static int oci_cgroup_devices(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
_cleanup_free_ struct device_data *list = NULL;
Settings *s = userdata;
size_t n_list = 0, i;
bool noop = false;
JsonVariant *e;
int r;
assert(s);
JSON_VARIANT_ARRAY_FOREACH(e, v) {
struct device_data data = {
.major = (unsigned) -1,
.minor = (unsigned) -1,
}, *a;
static const JsonDispatch table[] = {
{ "allow", JSON_VARIANT_BOOLEAN, json_dispatch_boolean, offsetof(struct device_data, allow), JSON_MANDATORY },
{ "type", JSON_VARIANT_STRING, oci_cgroup_device_type, offsetof(struct device_data, type), 0 },
{ "major", JSON_VARIANT_UNSIGNED, oci_device_major, offsetof(struct device_data, major), 0 },
{ "minor", JSON_VARIANT_UNSIGNED, oci_device_minor, offsetof(struct device_data, minor), 0 },
{ "access", JSON_VARIANT_STRING, oci_cgroup_device_access, 0, 0 },
{}
};
r = json_dispatch(e, table, oci_unexpected, flags, &data);
if (r < 0)
return r;
if (!data.allow) {
/* The fact that OCI allows 'deny' entries makes really no sense, as 'allow' vs. 'deny' for the
* devices cgroup controller is really not about whitelisting and blacklisting but about adding
* and removing entries from the whitelist. Since we always start out with an empty whitelist
* we hence ignore the whole thing, as removing entries which don't exist make no sense. We'll
* log about this, since this is really borked in the spec, with one exception: the entry
* that's supposed to drop the kernel's default we ignore silently */
if (!data.r || !data.w || !data.m || data.type != 0 || data.major != (unsigned) -1 || data.minor != (unsigned) -1)
json_log(v, flags|JSON_WARNING, 0, "Devices cgroup whitelist with arbitrary 'allow' entries not supported, ignoring.");
/* We ignore the 'deny' entry as for us that's implied */
continue;
}
if (!data.r && !data.w && !data.m) {
json_log(v, flags|LOG_WARNING, 0, "Device cgroup whitelist entry with no effect found, ignoring.");
continue;
}
if (data.minor != (unsigned) -1 && data.major == (unsigned) -1)
return json_log(v, flags, SYNTHETIC_ERRNO(EOPNOTSUPP),
"Device cgroup whitelist entries with minors but no majors not supported.");
if (data.major != (unsigned) -1 && data.type == 0)
return json_log(v, flags, SYNTHETIC_ERRNO(EOPNOTSUPP),
"Device cgroup whitelist entries with majors but no device node type not supported.");
if (data.type == 0) {
if (data.r && data.w && data.m) /* a catchall whitelist entry means we are looking at a noop */
noop = true;
else
return json_log(v, flags, SYNTHETIC_ERRNO(EOPNOTSUPP),
"Device cgroup whitelist entries with no type not supported.");
}
a = reallocarray(list, n_list + 1, sizeof(struct device_data));
if (!a)
return log_oom();
list = a;
list[n_list++] = data;
}
if (noop)
return 0;
r = settings_allocate_properties(s);
if (r < 0)
return r;
r = sd_bus_message_open_container(s->properties, 'r', "sv");
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_append(s->properties, "s", "DeviceAllow");
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_open_container(s->properties, 'v', "a(ss)");
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_open_container(s->properties, 'a', "(ss)");
if (r < 0)
return bus_log_create_error(r);
for (i = 0; i < n_list; i++) {
_cleanup_free_ char *pattern = NULL;
char access[4];
size_t n = 0;
if (list[i].minor == (unsigned) -1) {
const char *t;
if (list[i].type == S_IFBLK)
t = "block";
else {
assert(list[i].type == S_IFCHR);
t = "char";
}
if (list[i].major == (unsigned) -1) {
pattern = strjoin(t, "-*");
if (!pattern)
return log_oom();
} else {
if (asprintf(&pattern, "%s-%u", t, list[i].major) < 0)
return log_oom();
}
} else {
assert(list[i].major != (unsigned) -1); /* If a minor is specified, then a major also needs to be specified */
r = device_path_make_major_minor(list[i].type, makedev(list[i].major, list[i].minor), &pattern);
if (r < 0)
return log_oom();
}
if (list[i].r)
access[n++] = 'r';
if (list[i].w)
access[n++] = 'w';
if (list[i].m)
access[n++] = 'm';
access[n] = 0;
assert(n > 0);
r = sd_bus_message_append(s->properties, "(ss)", pattern, access);
if (r < 0)
return bus_log_create_error(r);
}
r = sd_bus_message_close_container(s->properties);
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_close_container(s->properties);
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_close_container(s->properties);
if (r < 0)
return bus_log_create_error(r);
return 0;
}
static int oci_cgroup_memory_limit(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
uint64_t *m = userdata;
uintmax_t k;
assert(m);
if (json_variant_is_negative(v)) {
*m = UINT64_MAX;
return 0;
}
if (!json_variant_is_unsigned(v))
return json_log(v, flags, SYNTHETIC_ERRNO(EINVAL),
"Memory limit is not an unsigned integer");
k = json_variant_unsigned(v);
if (k >= UINT64_MAX)
return json_log(v, flags, SYNTHETIC_ERRNO(ERANGE),
"Memory limit too large: %ji", k);
*m = (uint64_t) k;
return 0;
}
static int oci_cgroup_memory(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
struct memory_data {
uint64_t limit;
uint64_t reservation;
uint64_t swap;
} data = {
.limit = UINT64_MAX,
.reservation = UINT64_MAX,
.swap = UINT64_MAX,
};
static const JsonDispatch table[] = {
{ "limit", JSON_VARIANT_NUMBER, oci_cgroup_memory_limit, offsetof(struct memory_data, limit), 0 },
{ "reservation", JSON_VARIANT_NUMBER, oci_cgroup_memory_limit, offsetof(struct memory_data, reservation), 0 },
{ "swap", JSON_VARIANT_NUMBER, oci_cgroup_memory_limit, offsetof(struct memory_data, swap), 0 },
{ "kernel", JSON_VARIANT_NUMBER, oci_unsupported, 0, JSON_PERMISSIVE },
{ "kernelTCP", JSON_VARIANT_NUMBER, oci_unsupported, 0, JSON_PERMISSIVE },
{ "swapiness", JSON_VARIANT_NUMBER, oci_unsupported, 0, JSON_PERMISSIVE },
{ "disableOOMKiller", JSON_VARIANT_NUMBER, oci_unsupported, 0, JSON_PERMISSIVE },
{}
};
Settings *s = userdata;
int r;
r = json_dispatch(v, table, oci_unexpected, flags, &data);
if (r < 0)
return r;
if (data.swap != UINT64_MAX) {
if (data.limit == UINT64_MAX)
json_log(v, flags|LOG_WARNING, 0, "swap limit without memory limit is not supported, ignoring.");
else if (data.swap < data.limit)
json_log(v, flags|LOG_WARNING, 0, "swap limit is below memory limit, ignoring.");
else {
r = settings_allocate_properties(s);
if (r < 0)
return r;
r = sd_bus_message_append(s->properties, "(sv)", "MemorySwapMax", "t", data.swap - data.limit);
if (r < 0)
return bus_log_create_error(r);
}
}
if (data.limit != UINT64_MAX) {
r = settings_allocate_properties(s);
if (r < 0)
return r;
r = sd_bus_message_append(s->properties, "(sv)", "MemoryMax", "t", data.limit);
if (r < 0)
return bus_log_create_error(r);
}
if (data.reservation != UINT64_MAX) {
r = settings_allocate_properties(s);
if (r < 0)
return r;
r = sd_bus_message_append(s->properties, "(sv)", "MemoryLow", "t", data.reservation);
if (r < 0)
return bus_log_create_error(r);
}
return 0;
}
struct cpu_data {
uint64_t shares;
uint64_t quota;
uint64_t period;
CPUSet cpu_set;
};
static int oci_cgroup_cpu_shares(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
uint64_t *u = userdata;
uintmax_t k;
assert(u);
k = json_variant_unsigned(v);
if (k < CGROUP_CPU_SHARES_MIN || k > CGROUP_CPU_SHARES_MAX)
return json_log(v, flags, SYNTHETIC_ERRNO(ERANGE),
"shares value out of range.");
*u = (uint64_t) k;
return 0;
}
static int oci_cgroup_cpu_quota(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
uint64_t *u = userdata;
uintmax_t k;
assert(u);
k = json_variant_unsigned(v);
if (k <= 0 || k >= UINT64_MAX)
return json_log(v, flags, SYNTHETIC_ERRNO(ERANGE),
"period/quota value out of range.");
*u = (uint64_t) k;
return 0;
}
static int oci_cgroup_cpu_cpus(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
struct cpu_data *data = userdata;
CPUSet set;
const char *n;
int r;
assert(data);
assert_se(n = json_variant_string(v));
r = parse_cpu_set(n, &set);
if (r < 0)
return json_log(v, flags, r, "Failed to parse CPU set specification: %s", n);
cpu_set_reset(&data->cpu_set);
data->cpu_set = set;
return 0;
}
static int oci_cgroup_cpu(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
static const JsonDispatch table[] = {
{ "shares", JSON_VARIANT_UNSIGNED, oci_cgroup_cpu_shares, offsetof(struct cpu_data, shares), 0 },
{ "quota", JSON_VARIANT_UNSIGNED, oci_cgroup_cpu_quota, offsetof(struct cpu_data, quota), 0 },
{ "period", JSON_VARIANT_UNSIGNED, oci_cgroup_cpu_quota, offsetof(struct cpu_data, period), 0 },
{ "realtimeRuntime", JSON_VARIANT_UNSIGNED, oci_unsupported, 0, 0 },
{ "realtimePeriod", JSON_VARIANT_UNSIGNED, oci_unsupported, 0, 0 },
{ "cpus", JSON_VARIANT_STRING, oci_cgroup_cpu_cpus, 0, 0 },
{ "mems", JSON_VARIANT_STRING, oci_unsupported, 0, 0 },
{}
};
struct cpu_data data = {
.shares = UINT64_MAX,
.quota = UINT64_MAX,
.period = UINT64_MAX,
};
Settings *s = userdata;
int r;
r = json_dispatch(v, table, oci_unexpected, flags, &data);
if (r < 0) {
cpu_set_reset(&data.cpu_set);
return r;
}
cpu_set_reset(&s->cpu_set);
s->cpu_set = data.cpu_set;
if (data.shares != UINT64_MAX) {
r = settings_allocate_properties(s);
if (r < 0)
return r;
r = sd_bus_message_append(s->properties, "(sv)", "CPUShares", "t", data.shares);
if (r < 0)
return bus_log_create_error(r);
}
if (data.quota != UINT64_MAX && data.period != UINT64_MAX) {
r = settings_allocate_properties(s);
if (r < 0)
return r;
r = sd_bus_message_append(s->properties, "(sv)", "CPUQuotaPerSecUSec", "t", (uint64_t) (data.quota * USEC_PER_SEC / data.period));
if (r < 0)
return bus_log_create_error(r);
} else if ((data.quota != UINT64_MAX) != (data.period != UINT64_MAX))
return json_log(v, flags, SYNTHETIC_ERRNO(EINVAL),
"CPU quota and period not used together.");
return 0;
}
static int oci_cgroup_block_io_weight(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
Settings *s = userdata;
uintmax_t k;
int r;
assert(s);
k = json_variant_unsigned(v);
if (k < CGROUP_BLKIO_WEIGHT_MIN || k > CGROUP_BLKIO_WEIGHT_MAX)
return json_log(v, flags, SYNTHETIC_ERRNO(ERANGE),
"Block I/O weight out of range.");
r = settings_allocate_properties(s);
if (r < 0)
return r;
r = sd_bus_message_append(s->properties, "(sv)", "BlockIOWeight", "t", (uint64_t) k);
if (r < 0)
return bus_log_create_error(r);
return 0;
}
static int oci_cgroup_block_io_weight_device(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
Settings *s = userdata;
JsonVariant *e;
int r;
assert(s);
JSON_VARIANT_ARRAY_FOREACH(e, v) {
struct device_data {
unsigned major;
unsigned minor;
uintmax_t weight;
} data = {
.major = (unsigned) -1,
.minor = (unsigned) -1,
.weight = UINTMAX_MAX,
};
static const JsonDispatch table[] = {
{ "major", JSON_VARIANT_UNSIGNED, oci_device_major, offsetof(struct device_data, major), JSON_MANDATORY },
{ "minor", JSON_VARIANT_UNSIGNED, oci_device_minor, offsetof(struct device_data, minor), JSON_MANDATORY },
{ "weight", JSON_VARIANT_UNSIGNED, json_dispatch_unsigned, offsetof(struct device_data, weight), 0 },
{ "leafWeight", JSON_VARIANT_INTEGER, oci_unsupported, 0, JSON_PERMISSIVE },
{}
};
_cleanup_free_ char *path = NULL;
r = json_dispatch(e, table, oci_unexpected, flags, &data);
if (r < 0)
return r;
if (data.weight == UINTMAX_MAX)
continue;
if (data.weight < CGROUP_BLKIO_WEIGHT_MIN || data.weight > CGROUP_BLKIO_WEIGHT_MAX)
return json_log(v, flags, SYNTHETIC_ERRNO(ERANGE),
"Block I/O device weight out of range.");
r = device_path_make_major_minor(S_IFBLK, makedev(data.major, data.minor), &path);
if (r < 0)
return json_log(v, flags, r, "Failed to build device path: %m");
r = settings_allocate_properties(s);
if (r < 0)
return r;
r = sd_bus_message_append(s->properties, "(sv)", "BlockIODeviceWeight", "a(st)", 1, path, (uint64_t) data.weight);
if (r < 0)
return bus_log_create_error(r);
}
return 0;
}
static int oci_cgroup_block_io_throttle(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
Settings *s = userdata;
const char *pname;
JsonVariant *e;
int r;
assert(s);
pname = streq(name, "throttleReadBpsDevice") ? "IOReadBandwidthMax" :
streq(name, "throttleWriteBpsDevice") ? "IOWriteBandwidthMax" :
streq(name, "throttleReadIOPSDevice") ? "IOReadIOPSMax" :
"IOWriteIOPSMax";
JSON_VARIANT_ARRAY_FOREACH(e, v) {
struct device_data {
unsigned major;
unsigned minor;
uintmax_t rate;
} data = {
.major = (unsigned) -1,
.minor = (unsigned) -1,
};
static const JsonDispatch table[] = {
{ "major", JSON_VARIANT_UNSIGNED, oci_device_major, offsetof(struct device_data, major), JSON_MANDATORY },
{ "minor", JSON_VARIANT_UNSIGNED, oci_device_minor, offsetof(struct device_data, minor), JSON_MANDATORY },
{ "rate", JSON_VARIANT_UNSIGNED, json_dispatch_unsigned, offsetof(struct device_data, rate), JSON_MANDATORY },
{}
};
_cleanup_free_ char *path = NULL;
r = json_dispatch(e, table, oci_unexpected, flags, &data);
if (r < 0)
return r;
if (data.rate >= UINT64_MAX)
return json_log(v, flags, SYNTHETIC_ERRNO(ERANGE),
"Block I/O device rate out of range.");
r = device_path_make_major_minor(S_IFBLK, makedev(data.major, data.minor), &path);
if (r < 0)
return json_log(v, flags, r, "Failed to build device path: %m");
r = settings_allocate_properties(s);
if (r < 0)
return r;
r = sd_bus_message_append(s->properties, "(sv)", pname, "a(st)", 1, path, (uint64_t) data.rate);
if (r < 0)
return bus_log_create_error(r);
}
return 0;
}
static int oci_cgroup_block_io(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
static const JsonDispatch table[] = {
{ "weight", JSON_VARIANT_UNSIGNED, oci_cgroup_block_io_weight, 0, 0 },
{ "leafWeight", JSON_VARIANT_UNSIGNED, oci_unsupported, 0, JSON_PERMISSIVE },
{ "weightDevice", JSON_VARIANT_ARRAY, oci_cgroup_block_io_weight_device, 0, 0 },
{ "throttleReadBpsDevice", JSON_VARIANT_ARRAY, oci_cgroup_block_io_throttle, 0, 0 },
{ "throttleWriteBpsDevice", JSON_VARIANT_ARRAY, oci_cgroup_block_io_throttle, 0, 0 },
{ "throttleReadIOPSDevice", JSON_VARIANT_ARRAY, oci_cgroup_block_io_throttle, 0, 0 },
{ "throttleWriteIOPSDevice", JSON_VARIANT_ARRAY, oci_cgroup_block_io_throttle, 0, 0 },
{}
};
return json_dispatch(v, table, oci_unexpected, flags, userdata);
}
static int oci_cgroup_pids(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
static const JsonDispatch table[] = {
{ "limit", JSON_VARIANT_NUMBER, json_dispatch_variant, 0, JSON_MANDATORY },
{}
};
_cleanup_(json_variant_unrefp) JsonVariant *k = NULL;
Settings *s = userdata;
uint64_t m;
int r;
assert(s);
r = json_dispatch(v, table, oci_unexpected, flags, &k);
if (r < 0)
return r;
if (json_variant_is_negative(k))
m = UINT64_MAX;
else {
if (!json_variant_is_unsigned(k))
return json_log(k, flags, SYNTHETIC_ERRNO(EINVAL),
"pids limit not unsigned integer, refusing.");
m = (uint64_t) json_variant_unsigned(k);
if ((uintmax_t) m != json_variant_unsigned(k))
return json_log(v, flags, SYNTHETIC_ERRNO(EINVAL),
"pids limit out of range, refusing.");
}
r = settings_allocate_properties(s);
if (r < 0)
return r;
r = sd_bus_message_append(s->properties, "(sv)", "TasksMax", "t", m);
if (r < 0)
return bus_log_create_error(r);
return 0;
}
static int oci_resources(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
static const JsonDispatch table[] = {
{ "devices", JSON_VARIANT_ARRAY, oci_cgroup_devices, 0, 0 },
{ "memory", JSON_VARIANT_OBJECT, oci_cgroup_memory, 0, 0 },
{ "cpu", JSON_VARIANT_OBJECT, oci_cgroup_cpu, 0, 0 },
{ "blockIO", JSON_VARIANT_OBJECT, oci_cgroup_block_io, 0, 0 },
{ "hugepageLimits", JSON_VARIANT_ARRAY, oci_unsupported, 0, 0 },
{ "network", JSON_VARIANT_OBJECT, oci_unsupported, 0, 0 },
{ "pids", JSON_VARIANT_OBJECT, oci_cgroup_pids, 0, 0 },
{ "rdma", JSON_VARIANT_OBJECT, oci_unsupported, 0, 0 },
{}
};
return json_dispatch(v, table, oci_unexpected, flags, userdata);
}
static bool sysctl_key_valid(const char *s) {
bool dot = true;
/* Note that we are a bit stricter here than in systemd-sysctl, as that inherited semantics from the old sysctl
* tool, which were really weird (as it swaps / and . in both ways) */
if (isempty(s))
return false;
for (; *s; s++) {
if (*s <= ' ' || *s >= 127)
return false;
if (*s == '/')
return false;
if (*s == '.') {
if (dot) /* Don't allow two dots next to each other (or at the beginning) */
return false;
dot = true;
} else
dot = false;
}
if (dot) /* don't allow a dot at the end */
return false;
return true;
}
static int oci_sysctl(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
Settings *s = userdata;
JsonVariant *w;
const char *k;
int r;
assert(s);
JSON_VARIANT_OBJECT_FOREACH(k, w, v) {
const char *m;
if (!json_variant_is_string(w))
return json_log(v, flags, SYNTHETIC_ERRNO(EINVAL),
"sysctl parameter is not a string, refusing.");
assert_se(m = json_variant_string(w));
if (sysctl_key_valid(k))
return json_log(v, flags, SYNTHETIC_ERRNO(EINVAL),
"sysctl key invalid, refusing: %s", k);
r = strv_extend_strv(&s->sysctl, STRV_MAKE(k, m), false);
if (r < 0)
return log_oom();
}
return 0;
}
#if HAVE_SECCOMP
static int oci_seccomp_action_from_string(const char *name, uint32_t *ret) {
static const struct {
const char *name;
uint32_t action;
} table[] = {
{ "SCMP_ACT_ALLOW", SCMP_ACT_ALLOW },
{ "SCMP_ACT_ERRNO", SCMP_ACT_ERRNO(EPERM) }, /* the OCI spec doesn't document the error, but it appears EPERM is supposed to be used */
{ "SCMP_ACT_KILL", SCMP_ACT_KILL },
#ifdef SCMP_ACT_KILL_PROCESS
{ "SCMP_ACT_KILL_PROCESS", SCMP_ACT_KILL_PROCESS },
#endif
#ifdef SCMP_ACT_KILL_THREAD
{ "SCMP_ACT_KILL_THREAD", SCMP_ACT_KILL_THREAD },
#endif
#ifdef SCMP_ACT_LOG
{ "SCMP_ACT_LOG", SCMP_ACT_LOG },
#endif
{ "SCMP_ACT_TRAP", SCMP_ACT_TRAP },
/* We don't support SCMP_ACT_TRACE because that requires a tracer, and that doesn't really make sense
* here */
};
size_t i;
for (i = 0; i < ELEMENTSOF(table); i++)
if (streq_ptr(name, table[i].name)) {
*ret = table[i].action;
return 0;
}
return -EINVAL;
}
static int oci_seccomp_arch_from_string(const char *name, uint32_t *ret) {
static const struct {
const char *name;
uint32_t arch;
} table[] = {
{ "SCMP_ARCH_AARCH64", SCMP_ARCH_AARCH64 },
{ "SCMP_ARCH_ARM", SCMP_ARCH_ARM },
{ "SCMP_ARCH_MIPS", SCMP_ARCH_MIPS },
{ "SCMP_ARCH_MIPS64", SCMP_ARCH_MIPS64 },
{ "SCMP_ARCH_MIPS64N32", SCMP_ARCH_MIPS64N32 },
{ "SCMP_ARCH_MIPSEL", SCMP_ARCH_MIPSEL },
{ "SCMP_ARCH_MIPSEL64", SCMP_ARCH_MIPSEL64 },
{ "SCMP_ARCH_MIPSEL64N32", SCMP_ARCH_MIPSEL64N32 },
{ "SCMP_ARCH_NATIVE", SCMP_ARCH_NATIVE },
#ifdef SCMP_ARCH_PARISC
{ "SCMP_ARCH_PARISC", SCMP_ARCH_PARISC },
#endif
#ifdef SCMP_ARCH_PARISC64
{ "SCMP_ARCH_PARISC64", SCMP_ARCH_PARISC64 },
#endif
{ "SCMP_ARCH_PPC", SCMP_ARCH_PPC },
{ "SCMP_ARCH_PPC64", SCMP_ARCH_PPC64 },
{ "SCMP_ARCH_PPC64LE", SCMP_ARCH_PPC64LE },
{ "SCMP_ARCH_S390", SCMP_ARCH_S390 },
{ "SCMP_ARCH_S390X", SCMP_ARCH_S390X },
{ "SCMP_ARCH_X32", SCMP_ARCH_X32 },
{ "SCMP_ARCH_X86", SCMP_ARCH_X86 },
{ "SCMP_ARCH_X86_64", SCMP_ARCH_X86_64 },
};
size_t i;
for (i = 0; i < ELEMENTSOF(table); i++)
if (streq_ptr(table[i].name, name)) {
*ret = table[i].arch;
return 0;
}
return -EINVAL;
}
static int oci_seccomp_compare_from_string(const char *name, enum scmp_compare *ret) {
static const struct {
const char *name;
enum scmp_compare op;
} table[] = {
{ "SCMP_CMP_NE", SCMP_CMP_NE },
{ "SCMP_CMP_LT", SCMP_CMP_LT },
{ "SCMP_CMP_LE", SCMP_CMP_LE },
{ "SCMP_CMP_EQ", SCMP_CMP_EQ },
{ "SCMP_CMP_GE", SCMP_CMP_GE },
{ "SCMP_CMP_GT", SCMP_CMP_GT },
{ "SCMP_CMP_MASKED_EQ", SCMP_CMP_MASKED_EQ },
};
size_t i;
for (i = 0; i < ELEMENTSOF(table); i++)
if (streq_ptr(table[i].name, name)) {
*ret = table[i].op;
return 0;
}
return -EINVAL;
}
static int oci_seccomp_archs(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
scmp_filter_ctx *sc = userdata;
JsonVariant *e;
int r;
assert(sc);
JSON_VARIANT_ARRAY_FOREACH(e, v) {
uint32_t a;
if (!json_variant_is_string(e))
return json_log(e, flags, SYNTHETIC_ERRNO(EINVAL),
"Architecture entry is not a string");
r = oci_seccomp_arch_from_string(json_variant_string(e), &a);
if (r < 0)
return json_log(e, flags, r, "Unknown architecture: %s", json_variant_string(e));
r = seccomp_arch_add(sc, a);
if (r == -EEXIST)
continue;
if (r < 0)
return json_log(e, flags, r, "Failed to add architecture to seccomp filter: %m");
}
return 0;
}
struct syscall_rule {
char **names;
uint32_t action;
struct scmp_arg_cmp *arguments;
size_t n_arguments;
};
static void syscall_rule_free(struct syscall_rule *rule) {
assert(rule);
strv_free(rule->names);
free(rule->arguments);
};
static int oci_seccomp_action(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
uint32_t *action = userdata;
int r;
assert(action);
r = oci_seccomp_action_from_string(json_variant_string(v), action);
if (r < 0)
return json_log(v, flags, r, "Unknown system call action '%s': %m", json_variant_string(v));
return 0;
}
static int oci_seccomp_op(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
enum scmp_compare *op = userdata;
int r;
assert(op);
r = oci_seccomp_compare_from_string(json_variant_string(v), op);
if (r < 0)
return json_log(v, flags, r, "Unknown seccomp operator '%s': %m", json_variant_string(v));
return 0;
}
static int oci_seccomp_args(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
struct syscall_rule *rule = userdata;
JsonVariant *e;
int r;
assert(rule);
JSON_VARIANT_ARRAY_FOREACH(e, v) {
static const struct JsonDispatch table[] = {
{ "index", JSON_VARIANT_UNSIGNED, json_dispatch_uint32, offsetof(struct scmp_arg_cmp, arg), JSON_MANDATORY },
{ "value", JSON_VARIANT_UNSIGNED, json_dispatch_uint64, offsetof(struct scmp_arg_cmp, datum_a), JSON_MANDATORY },
{ "valueTwo", JSON_VARIANT_UNSIGNED, json_dispatch_uint64, offsetof(struct scmp_arg_cmp, datum_b), 0 },
{ "op", JSON_VARIANT_STRING, oci_seccomp_op, offsetof(struct scmp_arg_cmp, op), JSON_MANDATORY },
{},
};
struct scmp_arg_cmp *a, *p;
int expected;
a = reallocarray(rule->arguments, rule->n_arguments + 1, sizeof(struct syscall_rule));
if (!a)
return log_oom();
rule->arguments = a;
p = rule->arguments + rule->n_arguments;
*p = (struct scmp_arg_cmp) {
.arg = 0,
.datum_a = 0,
.datum_b = 0,
.op = 0,
};
r = json_dispatch(e, table, oci_unexpected, flags, p);
if (r < 0)
return r;
expected = p->op == SCMP_CMP_MASKED_EQ ? 4 : 3;
if (r != expected)
json_log(e, flags|JSON_WARNING, 0, "Wrong number of system call arguments for JSON data data, ignoring.");
/* Note that we are a bit sloppy here and do not insist that SCMP_CMP_MASKED_EQ gets two datum values,
* and the other only one. That's because buildah for example by default calls things with
* SCMP_CMP_MASKED_EQ but only one argument. We use 0 when the value is not specified. */
rule->n_arguments++;
}
return 0;
}
static int oci_seccomp_syscalls(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
scmp_filter_ctx *sc = userdata;
JsonVariant *e;
int r;
assert(sc);
JSON_VARIANT_ARRAY_FOREACH(e, v) {
static const JsonDispatch table[] = {
{ "names", JSON_VARIANT_ARRAY, json_dispatch_strv, offsetof(struct syscall_rule, names), JSON_MANDATORY },
{ "action", JSON_VARIANT_STRING, oci_seccomp_action, offsetof(struct syscall_rule, action), JSON_MANDATORY },
{ "args", JSON_VARIANT_ARRAY, oci_seccomp_args, 0, 0 },
};
struct syscall_rule rule = {
.action = (uint32_t) -1,
};
char **i;
r = json_dispatch(e, table, oci_unexpected, flags, &rule);
if (r < 0)
goto fail_rule;
if (strv_isempty(rule.names)) {
json_log(e, flags, 0, "System call name list is empty.");
r = -EINVAL;
goto fail_rule;
}
STRV_FOREACH(i, rule.names) {
int nr;
nr = seccomp_syscall_resolve_name(*i);
if (nr == __NR_SCMP_ERROR) {
log_debug("Unknown syscall %s, skipping.", *i);
continue;
}
r = seccomp_rule_add_array(sc, rule.action, nr, rule.n_arguments, rule.arguments);
if (r < 0)
goto fail_rule;
}
syscall_rule_free(&rule);
continue;
fail_rule:
syscall_rule_free(&rule);
return r;
}
return 0;
}
#endif
static int oci_seccomp(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
#if HAVE_SECCOMP
static const JsonDispatch table[] = {
{ "defaultAction", JSON_VARIANT_STRING, NULL, 0, JSON_MANDATORY },
{ "architectures", JSON_VARIANT_ARRAY, oci_seccomp_archs, 0, 0 },
{ "syscalls", JSON_VARIANT_ARRAY, oci_seccomp_syscalls, 0, 0 },
{}
};
_cleanup_(seccomp_releasep) scmp_filter_ctx sc = NULL;
Settings *s = userdata;
JsonVariant *def;
uint32_t d;
int r;
assert(s);
def = json_variant_by_key(v, "defaultAction");
if (!def)
return json_log(v, flags, SYNTHETIC_ERRNO(EINVAL), "defaultAction element missing.");
if (!json_variant_is_string(def))
return json_log(def, flags, SYNTHETIC_ERRNO(EINVAL), "defaultAction is not a string.");
r = oci_seccomp_action_from_string(json_variant_string(def), &d);
if (r < 0)
return json_log(def, flags, r, "Unknown default action: %s", json_variant_string(def));
sc = seccomp_init(d);
if (!sc)
return json_log(v, flags, SYNTHETIC_ERRNO(ENOMEM), "Couldn't allocate seccomp object.");
r = json_dispatch(v, table, oci_unexpected, flags, sc);
if (r < 0)
return r;
seccomp_release(s->seccomp);
s->seccomp = TAKE_PTR(sc);
return 0;
#else
return json_log(v, flags, SYNTHETIC_ERRNO(EOPNOTSUPP), "libseccomp support not enabled, can't parse seccomp object.");
#endif
}
static int oci_rootfs_propagation(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
const char *s;
s = json_variant_string(v);
if (streq(s, "shared"))
return 0;
json_log(v, flags|JSON_DEBUG, 0, "Ignoring rootfsPropagation setting '%s'.", s);
return 0;
}
static int oci_masked_paths(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
Settings *s = userdata;
JsonVariant *e;
assert(s);
JSON_VARIANT_ARRAY_FOREACH(e, v) {
_cleanup_free_ char *destination = NULL;
CustomMount *m;
const char *p;
if (!json_variant_is_string(e))
return json_log(v, flags, SYNTHETIC_ERRNO(EINVAL),
"Path is not a string, refusing.");
assert_se(p = json_variant_string(e));
if (!path_is_absolute(p))
return json_log(v, flags, SYNTHETIC_ERRNO(EINVAL),
"Path is not not absolute, refusing: %s", p);
if (oci_exclude_mount(p))
continue;
destination = strdup(p);
if (!destination)
return log_oom();
m = custom_mount_add(&s->custom_mounts, &s->n_custom_mounts, CUSTOM_MOUNT_INACCESSIBLE);
if (!m)
return log_oom();
m->destination = TAKE_PTR(destination);
/* The spec doesn't say this, but apparently pre-existing implementations are lenient towards
* non-existing paths to mask. Let's hence be too. */
m->graceful = true;
}
return 0;
}
static int oci_readonly_paths(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
Settings *s = userdata;
JsonVariant *e;
assert(s);
JSON_VARIANT_ARRAY_FOREACH(e, v) {
_cleanup_free_ char *source = NULL, *destination = NULL;
CustomMount *m;
const char *p;
if (!json_variant_is_string(e))
return json_log(v, flags, SYNTHETIC_ERRNO(EINVAL),
"Path is not a string, refusing.");
assert_se(p = json_variant_string(e));
if (!path_is_absolute(p))
return json_log(v, flags, SYNTHETIC_ERRNO(EINVAL),
"Path is not not absolute, refusing: %s", p);
if (oci_exclude_mount(p))
continue;
source = strjoin("+", p);
if (!source)
return log_oom();
destination = strdup(p);
if (!destination)
return log_oom();
m = custom_mount_add(&s->custom_mounts, &s->n_custom_mounts, CUSTOM_MOUNT_BIND);
if (!m)
return log_oom();
m->source = TAKE_PTR(source);
m->destination = TAKE_PTR(destination);
m->read_only = true;
}
return 0;
}
static int oci_linux(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
static const JsonDispatch table[] = {
{ "namespaces", JSON_VARIANT_ARRAY, oci_namespaces, 0, 0 },
{ "uidMappings", JSON_VARIANT_ARRAY, oci_uid_gid_mappings, 0, 0 },
{ "gidMappings", JSON_VARIANT_ARRAY, oci_uid_gid_mappings, 0, 0 },
{ "devices", JSON_VARIANT_ARRAY, oci_devices, 0, 0 },
{ "cgroupsPath", JSON_VARIANT_STRING, oci_cgroups_path, 0, 0 },
{ "resources", JSON_VARIANT_OBJECT, oci_resources, 0, 0 },
{ "intelRdt", JSON_VARIANT_OBJECT, oci_unsupported, 0, JSON_PERMISSIVE },
{ "sysctl", JSON_VARIANT_OBJECT, oci_sysctl, 0, 0 },
{ "seccomp", JSON_VARIANT_OBJECT, oci_seccomp, 0, 0 },
{ "rootfsPropagation", JSON_VARIANT_STRING, oci_rootfs_propagation, 0, 0 },
{ "maskedPaths", JSON_VARIANT_ARRAY, oci_masked_paths, 0, 0 },
{ "readonlyPaths", JSON_VARIANT_ARRAY, oci_readonly_paths, 0, 0 },
{ "mountLabel", JSON_VARIANT_STRING, oci_unsupported, 0, JSON_PERMISSIVE },
{}
};
return json_dispatch(v, table, oci_unexpected, flags, userdata);
}
static int oci_hook_timeout(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
usec_t *u = userdata;
uintmax_t k;
k = json_variant_unsigned(v);
if (k == 0 || k > (UINT64_MAX-1)/USEC_PER_SEC)
return json_log(v, flags, SYNTHETIC_ERRNO(ERANGE),
"Hook timeout value out of range.");
*u = k * USEC_PER_SEC;
return 0;
}
static int oci_hooks_array(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
Settings *s = userdata;
JsonVariant *e;
int r;
assert(s);
JSON_VARIANT_ARRAY_FOREACH(e, v) {
static const JsonDispatch table[] = {
{ "path", JSON_VARIANT_STRING, oci_absolute_path, offsetof(OciHook, path), JSON_MANDATORY },
{ "args", JSON_VARIANT_ARRAY, oci_args, offsetof(OciHook, args), 0 },
{ "env", JSON_VARIANT_ARRAY, oci_env, offsetof(OciHook, env), 0 },
{ "timeout", JSON_VARIANT_UNSIGNED, oci_hook_timeout, offsetof(OciHook, timeout), 0 },
{}
};
OciHook *a, **array, *new_item;
size_t *n_array;
if (streq(name, "prestart")) {
array = &s->oci_hooks_prestart;
n_array = &s->n_oci_hooks_prestart;
} else if (streq(name, "poststart")) {
array = &s->oci_hooks_poststart;
n_array = &s->n_oci_hooks_poststart;
} else {
assert(streq(name, "poststop"));
array = &s->oci_hooks_poststop;
n_array = &s->n_oci_hooks_poststop;
}
a = reallocarray(*array, *n_array + 1, sizeof(OciHook));
if (!a)
return log_oom();
*array = a;
new_item = a + *n_array;
*new_item = (OciHook) {
.timeout = USEC_INFINITY,
};
r = json_dispatch(e, table, oci_unexpected, flags, userdata);
if (r < 0) {
free(new_item->path);
strv_free(new_item->args);
strv_free(new_item->env);
return r;
}
(*n_array) ++;
}
return 0;
}
static int oci_hooks(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
static const JsonDispatch table[] = {
{ "prestart", JSON_VARIANT_OBJECT, oci_hooks_array, 0, 0 },
{ "poststart", JSON_VARIANT_OBJECT, oci_hooks_array, 0, 0 },
{ "poststop", JSON_VARIANT_OBJECT, oci_hooks_array, 0, 0 },
{}
};
return json_dispatch(v, table, oci_unexpected, flags, userdata);
}
static int oci_annotations(const char *name, JsonVariant *v, JsonDispatchFlags flags, void *userdata) {
JsonVariant *w;
const char *k;
JSON_VARIANT_OBJECT_FOREACH(k, w, v) {
if (isempty(k))
return json_log(v, flags, SYNTHETIC_ERRNO(EINVAL),
"Annotation with empty key, refusing.");
if (!json_variant_is_string(w))
return json_log(w, flags, SYNTHETIC_ERRNO(EINVAL),
"Annotation has non-string value, refusing.");
json_log(w, flags|JSON_DEBUG, 0, "Ignoring annotation '%s' with value '%s'.", k, json_variant_string(w));
}
return 0;
}
int oci_load(FILE *f, const char *bundle, Settings **ret) {
static const JsonDispatch table[] = {
{ "ociVersion", JSON_VARIANT_STRING, NULL, 0, JSON_MANDATORY },
{ "process", JSON_VARIANT_OBJECT, oci_process, 0, 0 },
{ "root", JSON_VARIANT_OBJECT, oci_root, 0, 0 },
{ "hostname", JSON_VARIANT_STRING, oci_hostname, 0, 0 },
{ "mounts", JSON_VARIANT_ARRAY, oci_mounts, 0, 0 },
{ "linux", JSON_VARIANT_OBJECT, oci_linux, 0, 0 },
{ "hooks", JSON_VARIANT_OBJECT, oci_hooks, 0, 0 },
{ "annotations", JSON_VARIANT_OBJECT, oci_annotations, 0, 0 },
{}
};
_cleanup_(json_variant_unrefp) JsonVariant *oci = NULL;
_cleanup_(settings_freep) Settings *s = NULL;
unsigned line = 0, column = 0;
JsonVariant *v;
const char *path;
int r;
assert_se(bundle);
path = strjoina(bundle, "/config.json");
r = json_parse_file(f, path, &oci, &line, &column);
if (r < 0) {
if (line != 0 && column != 0)
return log_error_errno(r, "Failed to parse '%s' at %u:%u: %m", path, line, column);
else
return log_error_errno(r, "Failed to parse '%s': %m", path);
}
v = json_variant_by_key(oci, "ociVersion");
if (!v) {
log_error("JSON file '%s' is not an OCI bundle configuration file. Refusing.", path);
return -EINVAL;
}
if (!streq_ptr(json_variant_string(v), "1.0.0")) {
log_error("OCI bundle version not supported: %s", strna(json_variant_string(v)));
return -EINVAL;
}
// {
// _cleanup_free_ char *formatted = NULL;
// assert_se(json_variant_format(oci, JSON_FORMAT_PRETTY|JSON_FORMAT_COLOR, &formatted) >= 0);
// fputs(formatted, stdout);
// }
s = settings_new();
if (!s)
return log_oom();
s->start_mode = START_PID1;
s->resolv_conf = RESOLV_CONF_OFF;
s->link_journal = LINK_NO;
s->timezone = TIMEZONE_OFF;
s->bundle = strdup(bundle);
if (!s->bundle)
return log_oom();
r = json_dispatch(oci, table, oci_unexpected, 0, s);
if (r < 0)
return r;
if (s->properties) {
r = sd_bus_message_seal(s->properties, 0, 0);
if (r < 0)
return log_error_errno(r, "Cannot seal properties bus message: %m");
}
*ret = TAKE_PTR(s);
return 0;
}