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systemd/0521-sd-bus-sync-kdbus.h-AB...

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From d663f1b1a92a778bcdc68f29b8c08cb49431b4f7 Mon Sep 17 00:00:00 2001
From: Daniel Mack <daniel@zonque.org>
Date: Mon, 6 Oct 2014 18:36:16 +0200
Subject: [PATCH] sd-bus: sync kdbus.h (ABI break)
The KDBUS_CMD_FREE ioctl now uses a struct rather than a direct pointer
to the offset to free.
The KDBUS_CMD_MSG_CANCEL ioctl has also changes, but there's no user of
it yet in systemd.
---
src/bus-proxyd/bus-proxyd.c | 6 +++++-
src/libsystemd/sd-bus/bus-control.c | 23 ++++++++++++++++++++---
src/libsystemd/sd-bus/bus-kernel.c | 7 +++++--
src/libsystemd/sd-bus/kdbus.h | 32 ++++++++++++++++++++++++++++++--
4 files changed, 60 insertions(+), 8 deletions(-)
diff --git a/src/bus-proxyd/bus-proxyd.c b/src/bus-proxyd/bus-proxyd.c
index 5d58cd2af4..cbec04933c 100644
--- a/src/bus-proxyd/bus-proxyd.c
+++ b/src/bus-proxyd/bus-proxyd.c
@@ -730,6 +730,7 @@ static int process_driver(sd_bus *a, sd_bus *b, sd_bus_message *m) {
} else if (sd_bus_message_is_method_call(m, "org.freedesktop.DBus", "ListQueuedOwners")) {
struct kdbus_cmd_name_list cmd = {};
struct kdbus_name_list *name_list;
+ struct kdbus_cmd_free cmd_free;
struct kdbus_cmd_name *name;
_cleanup_strv_free_ char **owners = NULL;
char *arg0;
@@ -773,7 +774,10 @@ static int process_driver(sd_bus *a, sd_bus *b, sd_bus_message *m) {
}
}
- r = ioctl(a->input_fd, KDBUS_CMD_FREE, &cmd.offset);
+ cmd_free.flags = 0;
+ cmd_free.offset = cmd.offset;
+
+ r = ioctl(a->input_fd, KDBUS_CMD_FREE, &cmd_free);
if (r < 0)
return synthetic_reply_method_errno(m, r, NULL);
diff --git a/src/libsystemd/sd-bus/bus-control.c b/src/libsystemd/sd-bus/bus-control.c
index d9a53c702f..dbd94fc46b 100644
--- a/src/libsystemd/sd-bus/bus-control.c
+++ b/src/libsystemd/sd-bus/bus-control.c
@@ -223,6 +223,23 @@ _public_ int sd_bus_release_name(sd_bus *bus, const char *name) {
return bus_release_name_dbus1(bus, name);
}
+static int kernel_cmd_free(sd_bus *bus, uint64_t offset)
+{
+ struct kdbus_cmd_free cmd;
+ int r;
+
+ assert(bus);
+
+ cmd.flags = 0;
+ cmd.offset = offset;
+
+ r = ioctl(bus->input_fd, KDBUS_CMD_FREE, &cmd);
+ if (r < 0)
+ return -errno;
+
+ return 0;
+}
+
static int kernel_get_list(sd_bus *bus, uint64_t flags, char ***x) {
struct kdbus_cmd_name_list cmd = {};
struct kdbus_name_list *name_list;
@@ -269,9 +286,9 @@ static int kernel_get_list(sd_bus *bus, uint64_t flags, char ***x) {
}
}
- r = ioctl(bus->input_fd, KDBUS_CMD_FREE, &cmd.offset);
+ r = kernel_cmd_free(bus, cmd.offset);
if (r < 0)
- return -errno;
+ return r;
return 0;
}
@@ -597,7 +614,7 @@ static int bus_get_owner_kdbus(
r = 0;
fail:
- ioctl(bus->input_fd, KDBUS_CMD_FREE, &cmd->offset);
+ kernel_cmd_free(bus, cmd->offset);
return r;
}
diff --git a/src/libsystemd/sd-bus/bus-kernel.c b/src/libsystemd/sd-bus/bus-kernel.c
index 09ff25fe71..5ae1418afc 100644
--- a/src/libsystemd/sd-bus/bus-kernel.c
+++ b/src/libsystemd/sd-bus/bus-kernel.c
@@ -799,14 +799,17 @@ int bus_kernel_connect(sd_bus *b) {
}
static void close_kdbus_msg(sd_bus *bus, struct kdbus_msg *k) {
+ struct kdbus_cmd_free cmd;
uint64_t off _alignas_(8);
struct kdbus_item *d;
assert(bus);
assert(k);
- off = (uint8_t *)k - (uint8_t *)bus->kdbus_buffer;
- ioctl(bus->input_fd, KDBUS_CMD_FREE, &off);
+ cmd.flags = 0;
+ cmd.offset = (uint8_t *)k - (uint8_t *)bus->kdbus_buffer;
+
+ ioctl(bus->input_fd, KDBUS_CMD_FREE, &cmd);
KDBUS_ITEM_FOREACH(d, k, items) {
diff --git a/src/libsystemd/sd-bus/kdbus.h b/src/libsystemd/sd-bus/kdbus.h
index 801125946b..8994b5673d 100644
--- a/src/libsystemd/sd-bus/kdbus.h
+++ b/src/libsystemd/sd-bus/kdbus.h
@@ -444,6 +444,31 @@ struct kdbus_cmd_recv {
} __attribute__((aligned(8)));
/**
+ * struct kdbus_cmd_cancel - struct to cancel a synchronously pending message
+ * @cookie The cookie of the pending message
+ * @flags Flags for the free command. Currently unused.
+ *
+ * This struct is used with the KDBUS_CMD_CANCEL ioctl.
+ */
+struct kdbus_cmd_cancel {
+ __u64 cookie;
+ __u64 flags;
+} __attribute__((aligned(8)));
+
+/**
+ * struct kdbus_cmd_free - struct to free a slice of memory in the pool
+ * @offset The offset of the memory slice, as returned by other
+ * ioctls
+ * @flags Flags for the free command. Currently unused.
+ *
+ * This struct is used with the KDBUS_CMD_FREE ioctl.
+ */
+struct kdbus_cmd_free {
+ __u64 offset;
+ __u64 flags;
+} __attribute__((aligned(8)));
+
+/**
* enum kdbus_policy_access_type - permissions of a policy record
* @_KDBUS_POLICY_ACCESS_NULL: Uninitialized/invalid
* @KDBUS_POLICY_ACCESS_USER: Grant access to a uid
@@ -710,6 +735,7 @@ struct kdbus_conn_info {
*/
struct kdbus_cmd_update {
__u64 size;
+ __u64 flags;
struct kdbus_item items[0];
} __attribute__((aligned(8)));
@@ -807,8 +833,10 @@ enum kdbus_ioctl_type {
struct kdbus_msg),
KDBUS_CMD_MSG_RECV = _IOWR(KDBUS_IOCTL_MAGIC, 0x41,
struct kdbus_cmd_recv),
- KDBUS_CMD_MSG_CANCEL = _IOW(KDBUS_IOCTL_MAGIC, 0x42, __u64 *),
- KDBUS_CMD_FREE = _IOW(KDBUS_IOCTL_MAGIC, 0x43, __u64 *),
+ KDBUS_CMD_MSG_CANCEL = _IOW(KDBUS_IOCTL_MAGIC, 0x42,
+ struct kdbus_cmd_cancel),
+ KDBUS_CMD_FREE = _IOW(KDBUS_IOCTL_MAGIC, 0x43,
+ struct kdbus_cmd_free),
KDBUS_CMD_NAME_ACQUIRE = _IOWR(KDBUS_IOCTL_MAGIC, 0x50,
struct kdbus_cmd_name),
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