#include "bus-message.h"
#include "bus-kernel.h"
#include "bus-bloom.h"
+#include "bus-util.h"
+
+#define UNIQUE_NAME_MAX (3+DECIMAL_STR_MAX(uint64_t))
int bus_kernel_parse_unique_name(const char *s, uint64_t *id) {
int r;
}
}
-static int bus_kernel_make_message(sd_bus *bus, struct kdbus_msg *k, sd_bus_message **ret) {
+static int push_name_owner_changed(sd_bus *bus, const char *name, const char *old_owner, const char *new_owner) {
+ _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
+ int r;
+
+ assert(bus);
+
+ r = sd_bus_message_new_signal(
+ bus,
+ "/org/freedesktop/DBus",
+ "org.freedesktop.DBus",
+ "NameOwnerChanged",
+ &m);
+ if (r < 0)
+ return r;
+
+ r = sd_bus_message_append(m, "sss", name, old_owner, new_owner);
+ if (r < 0)
+ return r;
+
+ m->sender = "org.freedesktop.DBus";
+
+ r = bus_seal_message(bus, m);
+ if (r < 0)
+ return r;
+
+ r = bus_rqueue_push(bus, m);
+ if (r < 0)
+ return r;
+
+ m = NULL;
+ return 1;
+}
+
+static int translate_name_change(sd_bus *bus, struct kdbus_msg *k, struct kdbus_item *d) {
+ char new_owner[UNIQUE_NAME_MAX], old_owner[UNIQUE_NAME_MAX];
+
+ assert(bus);
+ assert(k);
+ assert(d);
+
+ if (d->name_change.flags != 0)
+ return 0;
+
+ if (d->type == KDBUS_ITEM_NAME_ADD)
+ old_owner[0] = 0;
+ else
+ sprintf(old_owner, ":1.%llu", (unsigned long long) d->name_change.old_id);
+
+ if (d->type == KDBUS_ITEM_NAME_REMOVE)
+ new_owner[0] = 0;
+ else
+ sprintf(new_owner, ":1.%llu", (unsigned long long) d->name_change.new_id);
+
+ return push_name_owner_changed(bus, d->name_change.name, old_owner, new_owner);
+}
+
+static int translate_id_change(sd_bus *bus, struct kdbus_msg *k, struct kdbus_item *d) {
+ char owner[UNIQUE_NAME_MAX];
+
+ assert(bus);
+ assert(k);
+ assert(d);
+
+ sprintf(owner, ":1.%llu", d->id_change.id);
+
+ return push_name_owner_changed(
+ bus, owner,
+ d->type == KDBUS_ITEM_ID_ADD ? NULL : owner,
+ d->type == KDBUS_ITEM_ID_ADD ? owner : NULL);
+}
+
+static int translate_reply(sd_bus *bus, struct kdbus_msg *k, struct kdbus_item *d) {
+ _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
+ int r;
+
+ assert(bus);
+ assert(k);
+ assert(d);
+
+ r = bus_message_new_synthetic_error(
+ bus,
+ k->cookie_reply,
+ d->type == KDBUS_ITEM_REPLY_TIMEOUT ?
+ &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Method call timed out") :
+ &SD_BUS_ERROR_MAKE_CONST(SD_BUS_ERROR_NO_REPLY, "Method call peer died"),
+ &m);
+ if (r < 0)
+ return r;
+
+ m->sender = "org.freedesktop.DBus";
+
+ r = bus_seal_message(bus, m);
+ if (r < 0)
+ return r;
+
+ r = bus_rqueue_push(bus, m);
+ if (r < 0)
+ return r;
+
+ m = NULL;
+ return 1;
+}
+
+static int bus_kernel_translate_message(sd_bus *bus, struct kdbus_msg *k) {
+ struct kdbus_item *d, *found = NULL;
+
+ static int (* const translate[])(sd_bus *bus, struct kdbus_msg *k, struct kdbus_item *d) = {
+ [KDBUS_ITEM_NAME_ADD - _KDBUS_ITEM_KERNEL_BASE] = translate_name_change,
+ [KDBUS_ITEM_NAME_REMOVE - _KDBUS_ITEM_KERNEL_BASE] = translate_name_change,
+ [KDBUS_ITEM_NAME_CHANGE - _KDBUS_ITEM_KERNEL_BASE] = translate_name_change,
+
+ [KDBUS_ITEM_ID_ADD - _KDBUS_ITEM_KERNEL_BASE] = translate_id_change,
+ [KDBUS_ITEM_ID_REMOVE - _KDBUS_ITEM_KERNEL_BASE] = translate_id_change,
+
+ [KDBUS_ITEM_REPLY_TIMEOUT - _KDBUS_ITEM_KERNEL_BASE] = translate_reply,
+ [KDBUS_ITEM_REPLY_DEAD - _KDBUS_ITEM_KERNEL_BASE] = translate_reply,
+ };
+
+ assert(bus);
+ assert(k);
+ assert(k->payload_type == KDBUS_PAYLOAD_KERNEL);
+
+ KDBUS_PART_FOREACH(d, k, items) {
+ if (d->type >= _KDBUS_ITEM_KERNEL_BASE && d->type < _KDBUS_ITEM_KERNEL_BASE + ELEMENTSOF(translate)) {
+ if (found)
+ return -EBADMSG;
+ found = d;
+ } else
+ log_debug("Got unknown field from kernel %llu", d->type);
+ }
+
+ if (!found) {
+ log_debug("Didn't find a kernel message to translate.");
+ return 0;
+ }
+
+ return translate[found->type - _KDBUS_ITEM_KERNEL_BASE](bus, k, found);
+}
+
+int kdbus_translate_attach_flags(uint64_t mask, uint64_t *kdbus_mask) {
+
+ uint64_t m = 0;
+
+ SET_FLAG(m, KDBUS_ATTACH_CREDS,
+ !!(mask & (SD_BUS_CREDS_UID|SD_BUS_CREDS_GID|SD_BUS_CREDS_PID|SD_BUS_CREDS_PID_STARTTIME|SD_BUS_CREDS_TID)));
+
+ SET_FLAG(m, KDBUS_ATTACH_COMM,
+ !!(mask & (SD_BUS_CREDS_COMM|SD_BUS_CREDS_TID_COMM)));
+
+ SET_FLAG(m, KDBUS_ATTACH_EXE,
+ !!(mask & SD_BUS_CREDS_EXE));
+
+ SET_FLAG(m, KDBUS_ATTACH_CMDLINE,
+ !!(mask & SD_BUS_CREDS_CMDLINE));
+
+ SET_FLAG(m, KDBUS_ATTACH_CGROUP,
+ !!(mask & (SD_BUS_CREDS_CGROUP|SD_BUS_CREDS_UNIT|SD_BUS_CREDS_USER_UNIT|SD_BUS_CREDS_SLICE|SD_BUS_CREDS_SESSION|SD_BUS_CREDS_OWNER_UID)));
+
+ SET_FLAG(m, KDBUS_ATTACH_CAPS,
+ !!(mask & (SD_BUS_CREDS_EFFECTIVE_CAPS|SD_BUS_CREDS_PERMITTED_CAPS|SD_BUS_CREDS_INHERITABLE_CAPS|SD_BUS_CREDS_BOUNDING_CAPS)));
+
+ SET_FLAG(m, KDBUS_ATTACH_SECLABEL,
+ !!(mask & SD_BUS_CREDS_SELINUX_CONTEXT));
+
+ SET_FLAG(m, KDBUS_ATTACH_AUDIT,
+ !!(mask & (SD_BUS_CREDS_AUDIT_SESSION_ID|SD_BUS_CREDS_AUDIT_LOGIN_UID)));
+
+ *kdbus_mask = m;
+
+ return 0;
+}
+
+static int bus_kernel_make_message(sd_bus *bus, struct kdbus_msg *k) {
sd_bus_message *m = NULL;
struct kdbus_item *d;
unsigned n_fds = 0;
assert(bus);
assert(k);
- assert(ret);
-
- if (k->payload_type != KDBUS_PAYLOAD_DBUS1)
- return 0;
+ assert(k->payload_type == KDBUS_PAYLOAD_DBUS1);
KDBUS_PART_FOREACH(d, k, items) {
size_t l;
l = d->size - offsetof(struct kdbus_item, data);
- if (d->type == KDBUS_ITEM_PAYLOAD_OFF) {
+ switch (d->type) {
+ case KDBUS_ITEM_PAYLOAD_OFF:
if (!h) {
h = (struct bus_header *)((uint8_t *)bus->kdbus_buffer + d->vec.offset);
}
n_bytes += d->vec.size;
+ break;
- } else if (d->type == KDBUS_ITEM_PAYLOAD_MEMFD) {
-
+ case KDBUS_ITEM_PAYLOAD_MEMFD:
if (!h)
return -EBADMSG;
n_bytes += d->memfd.size;
+ break;
- } else if (d->type == KDBUS_ITEM_FDS) {
+ case KDBUS_ITEM_FDS: {
int *f;
unsigned j;
fds = f;
memcpy(fds + n_fds, d->fds, sizeof(int) * j);
n_fds += j;
+ break;
+ }
- } else if (d->type == KDBUS_ITEM_SECLABEL)
+ case KDBUS_ITEM_SECLABEL:
seclabel = d->str;
+ break;
+ }
}
if (!h)
l = d->size - offsetof(struct kdbus_item, data);
- if (d->type == KDBUS_ITEM_PAYLOAD_OFF) {
+ switch (d->type) {
+
+ case KDBUS_ITEM_PAYLOAD_OFF: {
size_t begin_body;
begin_body = BUS_MESSAGE_BODY_BEGIN(m);
}
idx += d->vec.size;
- } else if (d->type == KDBUS_ITEM_PAYLOAD_MEMFD) {
+ break;
+ }
+
+ case KDBUS_ITEM_PAYLOAD_MEMFD: {
struct bus_body_part *part;
if (idx < BUS_MESSAGE_BODY_BEGIN(m)) {
part->sealed = true;
idx += d->memfd.size;
+ break;
+ }
- } else if (d->type == KDBUS_ITEM_CREDS) {
+ case KDBUS_ITEM_CREDS:
m->creds.pid_starttime = d->creds.starttime / NSEC_PER_USEC;
m->creds.uid = d->creds.uid;
m->creds.gid = d->creds.gid;
m->creds.pid = d->creds.pid;
m->creds.tid = d->creds.tid;
m->creds.mask |= (SD_BUS_CREDS_UID|SD_BUS_CREDS_GID|SD_BUS_CREDS_PID|SD_BUS_CREDS_PID_STARTTIME|SD_BUS_CREDS_TID) & bus->creds_mask;
+ break;
- } else if (d->type == KDBUS_ITEM_TIMESTAMP) {
+ case KDBUS_ITEM_TIMESTAMP:
m->realtime = d->timestamp.realtime_ns / NSEC_PER_USEC;
m->monotonic = d->timestamp.monotonic_ns / NSEC_PER_USEC;
+ break;
- } else if (d->type == KDBUS_ITEM_PID_COMM) {
+ case KDBUS_ITEM_PID_COMM:
m->creds.comm = d->str;
m->creds.mask |= SD_BUS_CREDS_COMM & bus->creds_mask;
+ break;
- } else if (d->type == KDBUS_ITEM_TID_COMM) {
+ case KDBUS_ITEM_TID_COMM:
m->creds.tid_comm = d->str;
m->creds.mask |= SD_BUS_CREDS_TID_COMM & bus->creds_mask;
+ break;
- } else if (d->type == KDBUS_ITEM_EXE) {
+ case KDBUS_ITEM_EXE:
m->creds.exe = d->str;
m->creds.mask |= SD_BUS_CREDS_EXE & bus->creds_mask;
+ break;
- } else if (d->type == KDBUS_ITEM_CMDLINE) {
+ case KDBUS_ITEM_CMDLINE:
m->creds.cmdline = d->str;
m->creds.cmdline_length = l;
m->creds.mask |= SD_BUS_CREDS_CMDLINE & bus->creds_mask;
+ break;
- } else if (d->type == KDBUS_ITEM_CGROUP) {
+ case KDBUS_ITEM_CGROUP:
m->creds.cgroup = d->str;
m->creds.mask |= (SD_BUS_CREDS_CGROUP|SD_BUS_CREDS_UNIT|SD_BUS_CREDS_USER_UNIT|SD_BUS_CREDS_SLICE|SD_BUS_CREDS_SESSION|SD_BUS_CREDS_OWNER_UID) & bus->creds_mask;
+ break;
- } else if (d->type == KDBUS_ITEM_AUDIT) {
+ case KDBUS_ITEM_AUDIT:
m->creds.audit_session_id = d->audit.sessionid;
m->creds.audit_login_uid = d->audit.loginuid;
m->creds.mask |= (SD_BUS_CREDS_AUDIT_SESSION_ID|SD_BUS_CREDS_AUDIT_LOGIN_UID) & bus->creds_mask;
+ break;
- } else if (d->type == KDBUS_ITEM_CAPS) {
+ case KDBUS_ITEM_CAPS:
m->creds.capability = d->data;
m->creds.capability_size = l;
m->creds.mask |= (SD_BUS_CREDS_EFFECTIVE_CAPS|SD_BUS_CREDS_PERMITTED_CAPS|SD_BUS_CREDS_INHERITABLE_CAPS|SD_BUS_CREDS_BOUNDING_CAPS) & bus->creds_mask;
+ break;
- } else if (d->type == KDBUS_ITEM_DST_NAME)
+ case KDBUS_ITEM_DST_NAME:
destination = d->str;
- else if (d->type != KDBUS_ITEM_FDS &&
- d->type != KDBUS_ITEM_SECLABEL &&
- d->type != KDBUS_ITEM_NAMES)
+ break;
+
+ case KDBUS_ITEM_FDS:
+ case KDBUS_ITEM_SECLABEL:
+ case KDBUS_ITEM_NAMES:
+ break;
+
+ default:
log_debug("Got unknown field from kernel %llu", d->type);
+ }
}
r = bus_message_parse_fields(m);
fds = NULL;
- *ret = m;
+ r = bus_rqueue_push(bus, m);
+ if (r < 0)
+ goto fail;
+
return 1;
fail:
return r;
}
-int bus_kernel_read_message(sd_bus *bus, sd_bus_message **m) {
- uint64_t off;
+int bus_kernel_read_message(sd_bus *bus) {
struct kdbus_msg *k;
+ uint64_t off;
int r;
assert(bus);
- assert(m);
+
+ /* Kernel messages might result in 2 new queued messages in
+ * the worst case (NameOwnerChange and LostName for the same
+ * well-known name, for example). Let's make room in
+ * advance. */
+
+ r = bus_rqueue_make_room(bus, 2);
+ if (r < 0)
+ return r;
r = ioctl(bus->input_fd, KDBUS_CMD_MSG_RECV, &off);
if (r < 0) {
}
k = (struct kdbus_msg *)((uint8_t *)bus->kdbus_buffer + off);
- r = bus_kernel_make_message(bus, k, m);
+ if (k->payload_type == KDBUS_PAYLOAD_DBUS1)
+ r = bus_kernel_make_message(bus, k);
+ else if (k->payload_type == KDBUS_PAYLOAD_KERNEL)
+ r = bus_kernel_translate_message(bus, k);
+ else
+ r = 0;
+
if (r <= 0)
close_kdbus_msg(bus, k);
close_and_munmap(b->memfd_cache[i].fd, b->memfd_cache[i].address, b->memfd_cache[i].size);
}
-int sd_bus_kernel_translate_request_name_flags(uint64_t sd_bus_flags, uint64_t *kdbus_flags) {
+int kdbus_translate_request_name_flags(uint64_t sd_bus_flags, uint64_t *kdbus_flags) {
assert_return(kdbus_flags != NULL, -EINVAL);
~ianmdlvl / elogind.git / blobdiff