Lennart Poettering
10 years ago
9 changed files with 959 additions and 41 deletions
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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
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/***
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This file is part of systemd. |
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Copyright 2013 Lennart Poettering |
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systemd is free software; you can redistribute it and/or modify it |
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under the terms of the GNU Lesser General Public License as published by |
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the Free Software Foundation; either version 2.1 of the License, or |
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(at your option) any later version. |
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|
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systemd is distributed in the hope that it will be useful, but |
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WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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Lesser General Public License for more details. |
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|
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You should have received a copy of the GNU Lesser General Public License |
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/ |
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#include <fcntl.h> |
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#include "util.h" |
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#include "bus-internal.h" |
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#include "bus-message.h" |
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#include "bus-kernel.h" |
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#define KDBUS_MSG_FOREACH_DATA(d, k) \ |
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for ((d) = (k)->data; \ |
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(uint8_t*) (d) < (uint8_t*) (k) + (k)->size; \ |
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(d) = (struct kdbus_msg_data*) ((uint8_t*) (d) + ALIGN8((d)->size))) |
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static int parse_unique_name(const char *s, uint64_t *id) { |
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int r; |
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assert(s); |
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assert(id); |
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if (!startswith(s, ":1.")) |
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return 0; |
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r = safe_atou64(s + 3, id); |
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if (r < 0) |
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return r; |
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return 1; |
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} |
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static void append_payload_vec(struct kdbus_msg_data **d, const void *p, size_t sz) { |
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assert(d); |
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assert(p); |
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assert(sz > 0); |
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(*d)->size = offsetof(struct kdbus_msg_data, vec) + sizeof(struct kdbus_vec); |
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(*d)->type = KDBUS_MSG_PAYLOAD_VEC; |
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(*d)->vec.address = (uint64_t) p; |
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(*d)->vec.size = sz; |
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*d = (struct kdbus_msg_data*) ((uint8_t*) *d + ALIGN8((*d)->size)); |
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} |
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static void append_destination(struct kdbus_msg_data **d, const char *s, size_t length) { |
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assert(d); |
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assert(d); |
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(*d)->size = offsetof(struct kdbus_msg_data, data) + length + 1; |
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(*d)->type = KDBUS_MSG_DST_NAME; |
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memcpy((*d)->data, s, length + 1); |
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*d = (struct kdbus_msg_data*) ((uint8_t*) *d + ALIGN8((*d)->size)); |
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} |
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static int bus_message_setup_kmsg(sd_bus_message *m) { |
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struct kdbus_msg_data *d; |
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bool well_known; |
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uint64_t unique; |
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size_t sz, dl; |
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int r; |
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assert(m); |
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assert(m->sealed); |
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assert(!m->kdbus); |
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if (m->destination) { |
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r = parse_unique_name(m->destination, &unique); |
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if (r < 0) |
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return r; |
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well_known = r == 0; |
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} else |
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well_known = false; |
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sz = offsetof(struct kdbus_msg, data); |
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/* Add in fixed header, fields header, fields header padding and payload */ |
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sz += 4 * ALIGN8(offsetof(struct kdbus_msg_data, vec) + sizeof(struct kdbus_vec)); |
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/* Add in well-known destination header */ |
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if (well_known) { |
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dl = strlen(m->destination); |
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sz += ALIGN8(offsetof(struct kdbus_msg, data) + dl + 1); |
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} |
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m->kdbus = malloc0(sz); |
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if (!m->kdbus) |
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return -ENOMEM; |
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m->kdbus->flags = |
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((m->header->flags & SD_BUS_MESSAGE_NO_REPLY_EXPECTED) ? 0 : KDBUS_MSG_FLAGS_EXPECT_REPLY) | |
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((m->header->flags & SD_BUS_MESSAGE_NO_AUTO_START) ? KDBUS_MSG_FLAGS_NO_AUTO_START : 0); |
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m->kdbus->dst_id = |
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well_known ? 0 : |
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m->destination ? unique : (uint64_t) -1; |
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m->kdbus->payload_type = KDBUS_PAYLOAD_DBUS1; |
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m->kdbus->cookie = m->header->serial; |
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m->kdbus->timeout_ns = m->timeout * NSEC_PER_USEC; |
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d = m->kdbus->data; |
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if (well_known) |
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append_destination(&d, m->destination, dl); |
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append_payload_vec(&d, m->header, sizeof(*m->header)); |
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if (m->fields) { |
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append_payload_vec(&d, m->fields, m->header->fields_size); |
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if (m->header->fields_size % 8 != 0) { |
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static const uint8_t padding[7] = {}; |
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append_payload_vec(&d, padding, 8 - (m->header->fields_size % 8)); |
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} |
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} |
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if (m->body) |
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append_payload_vec(&d, m->body, m->header->body_size); |
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m->kdbus->size = (uint8_t*) m - (uint8_t*) m->kdbus; |
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assert(m->kdbus->size <= sz); |
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return 0; |
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} |
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int bus_kernel_take_fd(sd_bus *b) { |
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struct kdbus_cmd_hello hello = {}; |
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int r; |
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assert(b); |
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r = ioctl(b->input_fd, KDBUS_CMD_HELLO, &hello); |
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if (r < 0) |
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return -errno; |
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b->is_kernel = true; |
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r = bus_start_running(b); |
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if (r < 0) |
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return r; |
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return 1; |
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} |
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int bus_kernel_connect(sd_bus *b) { |
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assert(b); |
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assert(b->input_fd < 0); |
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assert(b->output_fd < 0); |
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assert(b->kernel); |
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b->input_fd = open(b->kernel, O_RDWR|O_NOCTTY|O_CLOEXEC); |
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if (b->input_fd) |
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return -errno; |
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b->output_fd = b->input_fd; |
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return bus_kernel_take_fd(b); |
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} |
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int bus_kernel_write_message(sd_bus *bus, sd_bus_message *m) { |
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int r; |
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assert(bus); |
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assert(m); |
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assert(bus->state == BUS_RUNNING); |
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r = bus_message_setup_kmsg(m); |
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if (r < 0) |
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return r; |
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r = ioctl(bus->output_fd, KDBUS_CMD_MSG_SEND, m->kdbus); |
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if (r < 0) |
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return errno == EAGAIN ? 0 : -errno; |
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return 0; |
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} |
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static void close_kdbus_msg(struct kdbus_msg *k) { |
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struct kdbus_msg_data *d; |
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KDBUS_MSG_FOREACH_DATA(d, k) { |
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if (d->type != KDBUS_MSG_UNIX_FDS) |
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continue; |
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close_many(d->fds, (d->size - offsetof(struct kdbus_msg_data, fds)) / sizeof(int)); |
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} |
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} |
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static int bus_kernel_make_message(sd_bus *bus, struct kdbus_msg *k, sd_bus_message **ret) { |
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sd_bus_message *m = NULL; |
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struct kdbus_msg_data *d; |
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unsigned n_payload = 0, n_fds = 0; |
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_cleanup_free_ int *fds = NULL; |
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struct bus_header *h = NULL; |
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size_t total, n_bytes = 0, idx = 0; |
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int r; |
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assert(bus); |
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assert(k); |
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assert(ret); |
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if (k->payload_type != KDBUS_PAYLOAD_DBUS1) |
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return 0; |
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KDBUS_MSG_FOREACH_DATA(d, k) { |
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size_t l; |
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l = d->size - offsetof(struct kdbus_msg_data, data); |
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if (d->type == KDBUS_MSG_PAYLOAD) { |
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if (!h) { |
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if (l < sizeof(struct bus_header)) |
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return -EBADMSG; |
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h = (struct bus_header*) d->data; |
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} |
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n_payload++; |
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n_bytes += l; |
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} else if (d->type == KDBUS_MSG_UNIX_FDS) { |
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int *f; |
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unsigned j; |
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j = l / sizeof(int); |
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f = realloc(fds, sizeof(int) * (n_fds + j)); |
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if (!f) |
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return -ENOMEM; |
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fds = f; |
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memcpy(fds + n_fds, d->fds, j); |
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n_fds += j; |
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} |
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} |
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if (!h) |
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return -EBADMSG; |
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r = bus_header_size(h, &total); |
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if (r < 0) |
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return r; |
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if (n_bytes != total) |
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return -EBADMSG; |
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r = bus_message_from_header(h, sizeof(struct bus_header), fds, n_fds, NULL, NULL, 0, &m); |
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if (r < 0) |
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return r; |
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KDBUS_MSG_FOREACH_DATA(d, k) { |
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size_t l; |
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if (d->type != KDBUS_MSG_PAYLOAD) |
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continue; |
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l = d->size - offsetof(struct kdbus_msg_data, data); |
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if (idx == sizeof(struct bus_header) && |
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l == BUS_MESSAGE_FIELDS_SIZE(m)) |
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m->fields = d->data; |
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else if (idx == sizeof(struct bus_header) + ALIGN8(BUS_MESSAGE_FIELDS_SIZE(m)) && |
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l == BUS_MESSAGE_BODY_SIZE(m)) |
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m->body = d->data; |
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else { |
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sd_bus_message_unref(m); |
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return -EBADMSG; |
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} |
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idx += l; |
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} |
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r = bus_message_parse_fields(m); |
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if (r < 0) { |
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sd_bus_message_unref(m); |
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return r; |
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} |
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/* We take possession of the kmsg struct now */ |
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m->kdbus = k; |
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m->free_kdbus = true; |
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m->free_fds = true; |
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fds = NULL; |
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*ret = m; |
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return 1; |
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} |
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int bus_kernel_read_message(sd_bus *bus, sd_bus_message **m) { |
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struct kdbus_msg *k; |
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size_t sz = 128; |
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int r; |
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assert(bus); |
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assert(m); |
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for (;;) { |
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void *q; |
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q = realloc(bus->rbuffer, sz); |
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if (!q) |
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return -errno; |
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k = bus->rbuffer = q; |
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k->size = sz; |
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r = ioctl(bus->input_fd, KDBUS_CMD_MSG_RECV, bus->rbuffer); |
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if (r >= 0) |
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break; |
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if (errno == EAGAIN) |
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return 0; |
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if (errno != -EMSGSIZE) |
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return -errno; |
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sz *= 2; |
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} |
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r = bus_kernel_make_message(bus, k, m); |
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if (r > 0) |
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bus->rbuffer = NULL; |
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else |
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close_kdbus_msg(k); |
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return r; |
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} |
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int bus_kernel_create(const char *name, char **s) { |
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struct kdbus_cmd_fname *fname; |
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size_t l; |
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int fd; |
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char *p; |
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assert(name); |
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assert(s); |
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fd = open("/dev/kdbus/control", O_RDWR|O_NOCTTY|O_CLOEXEC); |
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if (fd < 0) |
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return -errno; |
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l = strlen(name); |
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fname = alloca(offsetof(struct kdbus_cmd_fname, name) + DECIMAL_STR_MAX(uid_t) + 1 + l + 1); |
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sprintf(fname->name, "%lu-%s", (unsigned long) getuid(), name); |
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fname->size = offsetof(struct kdbus_cmd_fname, name) + strlen(fname->name) + 1; |
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fname->kernel_flags = KDBUS_CMD_FNAME_ACCESS_WORLD; |
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fname->user_flags = 0; |
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p = strjoin("/dev/kdbus/", fname->name, "/bus", NULL); |
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if (!p) |
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return -ENOMEM; |
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if (ioctl(fd, KDBUS_CMD_BUS_MAKE, &fname) < 0) { |
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close_nointr_nofail(fd); |
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free(p); |
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return -errno; |
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} |
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if (s) |
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*s = p; |
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return fd; |
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} |
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@ -0,0 +1,32 @@ |
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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
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#pragma once |
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/***
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This file is part of systemd. |
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|
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Copyright 2013 Lennart Poettering |
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|
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systemd is free software; you can redistribute it and/or modify it |
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under the terms of the GNU Lesser General Public License as published by |
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the Free Software Foundation; either version 2.1 of the License, or |
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(at your option) any later version. |
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|
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systemd is distributed in the hope that it will be useful, but |
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WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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Lesser General Public License for more details. |
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|
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You should have received a copy of the GNU Lesser General Public License |
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/ |
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#include "sd-bus.h" |
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int bus_kernel_connect(sd_bus *b); |
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int bus_kernel_take_fd(sd_bus *b); |
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int bus_kernel_write_message(sd_bus *bus, sd_bus_message *m); |
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int bus_kernel_read_message(sd_bus *bus, sd_bus_message **m); |
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int bus_kernel_create(const char *name, char **s); |
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@ -0,0 +1,360 @@ |
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/*
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* Copyright (C) 2013 Kay Sievers |
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* Copyright (C) 2013 Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
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* Copyright (C) 2013 Linux Foundation |
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* |
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* kdbus is free software; you can redistribute it and/or modify it under |
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* the terms of the GNU Lesser General Public License as published by the |
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* Free Software Foundation; either version 2.1 of the License, or (at |
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* your option) any later version. |
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*/ |
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#ifndef _KDBUS_H_ |
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#define _KDBUS_H_ |
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#ifndef __KERNEL__ |
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#include <sys/ioctl.h> |
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#include <sys/types.h> |
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#include <linux/types.h> |
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#endif |
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#define KDBUS_IOC_MAGIC 0x95 |
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/* Message sent from kernel to userspace, when the owner or starter of
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* a well-known name changes */ |
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struct kdbus_manager_msg_name_change { |
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__u64 old_id; |
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__u64 new_id; |
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__u64 flags; /* 0 or (possibly?) KDBUS_CMD_NAME_IN_QUEUE */ |
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char name[0]; |
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}; |
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struct kdbus_manager_msg_id_change { |
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__u64 id; |
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__u64 flags; /* The kernel flags field from KDBUS_CMD_HELLO */ |
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}; |
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struct kdbus_creds { |
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__u64 uid; |
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__u64 gid; |
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__u64 pid; |
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__u64 tid; |
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/* The starttime of the process PID. This is useful to detect
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PID overruns from the client side. i.e. if you use the PID to |
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look something up in /proc/$PID/ you can afterwards check the |
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starttime field of it to ensure you didn't run into a PID |
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ovretun. */ |
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__u64 starttime; |
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}; |
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#define KDBUS_SRC_ID_KERNEL (0) |
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#define KDBUS_DST_ID_WELL_KNOWN_NAME (0) |
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#define KDBUS_MATCH_SRC_ID_ANY (~0ULL) |
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#define KDBUS_DST_ID_BROADCAST (~0ULL) |
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/* Message Data Types */ |
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enum { |
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/* Filled in by userspace */ |
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KDBUS_MSG_NULL, /* empty record */ |
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KDBUS_MSG_PAYLOAD, /* .data */ |
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KDBUS_MSG_PAYLOAD_VEC, /* .data_vec, converted into _PAYLOAD at delivery */ |
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KDBUS_MSG_MMAP, /* .data_vec */ |
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KDBUS_MSG_MMAP_DONATE, /* .data_vec, unmap the memory from the sender */ |
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KDBUS_MSG_UNIX_FDS, /* .data_fds of file descriptors */ |
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KDBUS_MSG_BLOOM, /* for broadcasts, carries bloom filter blob */ |
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KDBUS_MSG_DST_NAME, /* destination's well-known name */ |
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/* Filled in by kernelspace */ |
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KDBUS_MSG_SRC_NAMES = 0x200,/* NUL separated string list with well-known names of source */ |
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KDBUS_MSG_TIMESTAMP, /* .ts_ns of CLOCK_MONOTONIC */ |
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KDBUS_MSG_SRC_CREDS, /* .creds */ |
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KDBUS_MSG_SRC_COMM, /* optional */ |
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KDBUS_MSG_SRC_EXE, /* optional */ |
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KDBUS_MSG_SRC_CMDLINE, /* optional */ |
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KDBUS_MSG_SRC_CGROUP, /* optional, specified which one */ |
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KDBUS_MSG_SRC_CAPS, /* caps data blob */ |
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KDBUS_MSG_SRC_SECLABEL, /* NUL terminated string */ |
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KDBUS_MSG_SRC_AUDIT, /* array of two uint64_t of audit loginuid + sessiond */ |
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/* Special messages from kernel, consisting of one and only one of these data blocks */ |
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KDBUS_MSG_NAME_ADD = 0x400,/* .name_change */ |
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KDBUS_MSG_NAME_REMOVE, /* .name_change */ |
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KDBUS_MSG_NAME_CHANGE, /* .name_change */ |
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KDBUS_MSG_ID_ADD, /* .id_change */ |
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KDBUS_MSG_ID_REMOVE, /* .id_change */ |
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KDBUS_MSG_ID_CHANGE, /* .id_change */ |
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KDBUS_MSG_REPLY_TIMEOUT, /* empty, but .reply_cookie in .kdbus_msg is filled in */ |
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KDBUS_MSG_REPLY_DEAD, /* dito */ |
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}; |
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struct kdbus_vec { |
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__u64 address; |
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__u64 size; |
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}; |
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/**
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* struct kdbus_msg_data - chain of data blocks |
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* |
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* size: overall data record size |
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* type: kdbus_msg_data_type of data |
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*/ |
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struct kdbus_msg_data { |
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__u64 size; |
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__u64 type; |
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union { |
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/* inline data */ |
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__u8 data[0]; |
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__u32 data_u32[0]; |
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__u64 data_u64[0]; |
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|
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/* data vector */ |
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struct kdbus_vec vec; |
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|
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/* specific fields */ |
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int fds[0]; /* int array of file descriptors */ |
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__u64 ts_ns; /* timestamp in nanoseconds */ |
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struct kdbus_creds creds; |
|||
struct kdbus_manager_msg_name_change name_change; |
|||
struct kdbus_manager_msg_id_change id_change; |
|||
}; |
|||
}; |
|||
|
|||
enum { |
|||
KDBUS_MSG_FLAGS_EXPECT_REPLY = 1, |
|||
KDBUS_MSG_FLAGS_NO_AUTO_START = 2, /* possibly? */ |
|||
}; |
|||
|
|||
enum { |
|||
KDBUS_PAYLOAD_NONE = 0, |
|||
KDBUS_PAYLOAD_DBUS1 = 0x4442757356657231ULL, /* 'DBusVer1' */ |
|||
KDBUS_PAYLOAD_GVARIANT = 0x4756617269616e74ULL, /* 'GVariant' */ |
|||
}; |
|||
|
|||
/**
|
|||
* struct kdbus_msg |
|||
* |
|||
* set by userspace: |
|||
* dst_id: destination id |
|||
* flags: KDBUS_MSG_FLAGS_* |
|||
* data_size: overall message size |
|||
* data: data records |
|||
* |
|||
* set by kernel: |
|||
* src_id: who sent the message |
|||
*/ |
|||
struct kdbus_msg { |
|||
__u64 size; |
|||
__u64 flags; |
|||
__u64 dst_id; /* connection, 0 == name in data, ~0 broadcast */ |
|||
__u64 src_id; /* connection, 0 == kernel */ |
|||
__u64 payload_type; /* 'DBusVer1', 'GVariant', ... */ |
|||
__u64 cookie; /* userspace-supplied cookie */ |
|||
union { |
|||
__u64 cookie_reply; /* cookie we reply to */ |
|||
__u64 timeout_ns; /* timespan to wait for reply */ |
|||
}; |
|||
struct kdbus_msg_data data[0]; |
|||
}; |
|||
|
|||
enum { |
|||
KDBUS_POLICY_NAME, |
|||
KDBUS_POLICY_ACCESS, |
|||
}; |
|||
|
|||
enum { |
|||
KDBUS_POLICY_USER, |
|||
KDBUS_POLICY_GROUP, |
|||
KDBUS_POLICY_WORLD, |
|||
}; |
|||
|
|||
enum { |
|||
KDBUS_POLICY_RECV = 4, |
|||
KDBUS_POLICY_SEND = 2, |
|||
KDBUS_POLICY_OWN = 1, |
|||
}; |
|||
|
|||
struct kdbus_policy { |
|||
__u64 size; |
|||
__u64 type; /* NAME or ACCESS */ |
|||
union { |
|||
char name[0]; |
|||
struct { |
|||
__u32 type; /* USER, GROUP, WORLD */ |
|||
__u32 bits; /* RECV, SEND, OWN */ |
|||
__u64 id; /* uid, gid, 0 */ |
|||
} access; |
|||
}; |
|||
}; |
|||
|
|||
struct kdbus_cmd_policy { |
|||
__u64 size; |
|||
__u8 buffer[0]; /* a series of KDBUS_POLICY_NAME plus one or more KDBUS_POLICY_ACCESS each. */ |
|||
}; |
|||
|
|||
enum { |
|||
KDBUS_CMD_HELLO_STARTER = 1, |
|||
KDBUS_CMD_HELLO_ACCEPT_FD = 2, |
|||
KDBUS_CMD_HELLO_ACCEPT_MMAP = 4, |
|||
}; |
|||
|
|||
enum { |
|||
KDBUS_CMD_FNAME_ACCESS_GROUP = 1, |
|||
KDBUS_CMD_FNAME_ACCESS_WORLD = 2, |
|||
}; |
|||
|
|||
struct kdbus_cmd_hello { |
|||
/* userspace → kernel, kernel → userspace */ |
|||
__u64 kernel_flags; /* userspace specifies its
|
|||
* capabilities and more, kernel |
|||
* returns its capabilites and |
|||
* more. Kernel might refuse client's |
|||
* capabilities by returning an error |
|||
* from KDBUS_CMD_HELLO */ |
|||
|
|||
/* userspace → kernel */ |
|||
__u64 pid; /* To allow translator services which
|
|||
* connect to the bus on behalf of |
|||
* somebody else, allow specifiying |
|||
* the PID of the client to connect on |
|||
* behalf on. Normal clients should |
|||
* pass this as 0 (i.e. to do things |
|||
* under their own PID). Priviliged |
|||
* clients can pass != 0, to operate |
|||
* on behalf of somebody else. */ |
|||
|
|||
/* kernel → userspace */ |
|||
__u64 bus_flags; /* this is .flags copied verbatim from
|
|||
* from original KDBUS_CMD_BUS_MAKE |
|||
* ioctl. It's intended to be useful |
|||
* to do negotiation of features of |
|||
* the payload that is transfreted. */ |
|||
__u64 id; /* peer id */ |
|||
}; |
|||
|
|||
struct kdbus_cmd_fname { |
|||
__u64 size; |
|||
__u64 kernel_flags; /* userspace → kernel, kernel → userspace
|
|||
* When creating a bus/ns/ep feature |
|||
* kernel negotiation done the same |
|||
* way as for KDBUS_CMD_BUS_MAKE. */ |
|||
__u64 user_flags; /* userspace → kernel
|
|||
* When a bus is created this value is |
|||
* copied verbatim into the bus |
|||
* structure and returned from |
|||
* KDBUS_CMD_HELLO, later */ |
|||
char name[0]; |
|||
}; |
|||
|
|||
enum { |
|||
/* userspace → kernel */ |
|||
KDBUS_CMD_NAME_REPLACE_EXISTING = 1, |
|||
KDBUS_CMD_NAME_QUEUE = 2, |
|||
KDBUS_CMD_NAME_ALLOW_REPLACEMENT = 4, |
|||
KDBUS_CMD_NAME_STEAL_MESSAGES = 8, |
|||
|
|||
/* kernel → userspace */ |
|||
KDBUS_CMD_NAME_IN_QUEUE = 0x200, |
|||
}; |
|||
|
|||
struct kdbus_cmd_name { |
|||
__u64 size; |
|||
__u64 flags; |
|||
__u64 id; /* We allow registration/deregestration of names of other peers */ |
|||
char name[0]; |
|||
}; |
|||
|
|||
struct kdbus_cmd_names { |
|||
__u64 size; |
|||
struct kdbus_cmd_name names[0]; |
|||
}; |
|||
|
|||
enum { |
|||
KDBUS_CMD_NAME_INFO_ITEM_NAME, |
|||
KDBUS_CMD_NAME_INFO_ITEM_SECLABEL, |
|||
KDBUS_CMD_NAME_INFO_ITEM_AUDIT, |
|||
}; |
|||
|
|||
struct kdbus_cmd_name_info_item { |
|||
__u64 size; |
|||
__u64 type; |
|||
__u8 data[0]; |
|||
}; |
|||
|
|||
struct kdbus_cmd_name_info { |
|||
__u64 size; /* overall size of info */ |
|||
__u64 flags; |
|||
__u64 id; /* either ID, or 0 and _ITEM_NAME follows */ |
|||
struct kdbus_creds creds; |
|||
struct kdbus_cmd_name_info_item item[0]; /* list of item records */ |
|||
}; |
|||
|
|||
enum { |
|||
KDBUS_CMD_MATCH_BLOOM, /* Matches a mask blob against KDBUS_MSG_BLOOM */ |
|||
KDBUS_CMD_MATCH_SRC_NAME, /* Matches a name string against KDBUS_MSG_SRC_NAMES */ |
|||
KDBUS_CMD_MATCH_NAME_ADD, /* Matches a name string against KDBUS_MSG_NAME_ADD */ |
|||
KDBUS_CMD_MATCH_NAME_REMOVE, /* Matches a name string against KDBUS_MSG_NAME_REMOVE */ |
|||
KDBUS_CMD_MATCH_NAME_CHANGE, /* Matches a name string against KDBUS_MSG_NAME_CHANGE */ |
|||
KDBUS_CMD_MATCH_ID_ADD, /* Matches an ID against KDBUS_MSG_ID_ADD */ |
|||
KDBUS_CMD_MATCH_ID_REMOVE, /* Matches an ID against KDBUS_MSG_ID_REMOVE */ |
|||
KDBUS_CMD_MATCH_ID_CHANGE, /* Matches an ID against KDBUS_MSG_ID_CHANGE */ |
|||
}; |
|||
|
|||
struct kdbus_cmd_match_item { |
|||
__u64 size; |
|||
__u64 type; |
|||
__u8 data[0]; |
|||
}; |
|||
|
|||
struct kdbus_cmd_match { |
|||
__u64 size; |
|||
__u64 id; /* We allow registration/deregestration of matches for other peers */ |
|||
__u64 cookie; /* userspace supplied cookie; when removing; kernel deletes everything with same cookie */ |
|||
__u64 src_id; /* ~0: any. other: exact unique match */ |
|||
struct kdbus_cmd_match_item items[0]; |
|||
}; |
|||
|
|||
struct kdbus_cmd_monitor { |
|||
__u64 id; /* We allow setting the monitor flag of other peers */ |
|||
int enabled; /* A boolean to enable/disable monitoring */ |
|||
}; |
|||
|
|||
/* FD states:
|
|||
* control nodes: unset |
|||
* bus owner (via KDBUS_CMD_BUS_MAKE) |
|||
* ns owner (via KDBUS_CMD_NS_MAKE) |
|||
* |
|||
* ep nodes: unset |
|||
* connected (via KDBUS_CMD_HELLO) |
|||
* starter (via KDBUS_CMD_HELLO with KDBUS_CMD_HELLO_STARTER) |
|||
* ep owner (via KDBUS_CMD_EP_MAKE) |
|||
*/ |
|||
enum kdbus_cmd { |
|||
/* kdbus control node commands: require unset state */ |
|||
KDBUS_CMD_BUS_MAKE = _IOWR(KDBUS_IOC_MAGIC, 0x00, struct kdbus_cmd_fname), |
|||
KDBUS_CMD_NS_MAKE = _IOWR(KDBUS_IOC_MAGIC, 0x10, struct kdbus_cmd_fname), |
|||
|
|||
/* kdbus control node commands: require bus owner state */ |
|||
KDBUS_CMD_BUS_POLICY_SET = _IOWR(KDBUS_IOC_MAGIC, 0x20, struct kdbus_cmd_policy), |
|||
|
|||
/* kdbus ep node commands: require unset state */ |
|||
KDBUS_CMD_EP_MAKE = _IOWR(KDBUS_IOC_MAGIC, 0x30, struct kdbus_cmd_fname), |
|||
KDBUS_CMD_HELLO = _IOWR(KDBUS_IOC_MAGIC, 0x31, struct kdbus_cmd_hello), |
|||
|
|||
/* kdbus ep node commands: require connected state */ |
|||
KDBUS_CMD_MSG_SEND = _IOWR(KDBUS_IOC_MAGIC, 0x40, struct kdbus_msg), |
|||
KDBUS_CMD_MSG_RECV = _IOWR(KDBUS_IOC_MAGIC, 0x41, struct kdbus_msg), |
|||
|
|||
KDBUS_CMD_NAME_ACQUIRE = _IOWR(KDBUS_IOC_MAGIC, 0x50, struct kdbus_cmd_name), |
|||
KDBUS_CMD_NAME_RELEASE = _IOWR(KDBUS_IOC_MAGIC, 0x51, struct kdbus_cmd_name), |
|||
KDBUS_CMD_NAME_LIST = _IOWR(KDBUS_IOC_MAGIC, 0x52, struct kdbus_cmd_names), |
|||
KDBUS_CMD_NAME_QUERY = _IOWR(KDBUS_IOC_MAGIC, 0x53, struct kdbus_cmd_name_info), |
|||
|
|||
KDBUS_CMD_MATCH_ADD = _IOWR(KDBUS_IOC_MAGIC, 0x60, struct kdbus_cmd_match), |
|||
KDBUS_CMD_MATCH_REMOVE = _IOWR(KDBUS_IOC_MAGIC, 0x61, struct kdbus_cmd_match), |
|||
KDBUS_CMD_MONITOR = _IOWR(KDBUS_IOC_MAGIC, 0x62, struct kdbus_cmd_monitor), |
|||
|
|||
/* kdbus ep node commands: require ep owner state */ |
|||
KDBUS_CMD_EP_POLICY_SET = _IOWR(KDBUS_IOC_MAGIC, 0x70, struct kdbus_cmd_policy), |
|||
}; |
|||
#endif |
|||
Loading…
Reference in new issue