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systemd/0364-sd-bus-sync-kdbus.h-AP...

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From f8c2425287c8362ae3a3c9acfb9e23a16862b38a Mon Sep 17 00:00:00 2001
From: Daniel Mack <daniel@zonque.org>
Date: Mon, 22 Sep 2014 18:20:14 +0200
Subject: [PATCH] sd-bus: sync kdbus.h (API+ABI break)
The kdbus logic name registry logic was changed to transport the actual
name to acquire, release or report in a kdbus item.
This brings the name API a little more in line with other calls, and allows
for later augmentation.
Follow that change on the systemd side.
---
src/bus-proxyd/bus-proxyd.c | 9 ++++++---
src/libsystemd/sd-bus/bus-control.c | 30 ++++++++++++++++++++++--------
src/libsystemd/sd-bus/kdbus.h | 23 ++++++++++-------------
3 files changed, 38 insertions(+), 24 deletions(-)
diff --git a/src/bus-proxyd/bus-proxyd.c b/src/bus-proxyd/bus-proxyd.c
index d35d7f63b2..a5387bb234 100644
--- a/src/bus-proxyd/bus-proxyd.c
+++ b/src/bus-proxyd/bus-proxyd.c
@@ -743,12 +743,15 @@ static int process_driver(sd_bus *a, sd_bus *b, sd_bus_message *m) {
name_list = (struct kdbus_name_list *) ((uint8_t *) a->kdbus_buffer + cmd.offset);
KDBUS_ITEM_FOREACH(name, name_list, names) {
+ const char *entry_name = NULL;
+ struct kdbus_item *item;
char *n;
- if (name->size <= sizeof(*name))
- continue;
+ KDBUS_ITEM_FOREACH(item, name, items)
+ if (item->type == KDBUS_ITEM_NAME)
+ entry_name = item->str;
- if (!streq(name->name, arg0))
+ if (!streq_ptr(entry_name, arg0))
continue;
if (asprintf(&n, ":1.%llu", (unsigned long long) name->owner_id) < 0) {
diff --git a/src/libsystemd/sd-bus/bus-control.c b/src/libsystemd/sd-bus/bus-control.c
index 5ac48c081f..50b662f85d 100644
--- a/src/libsystemd/sd-bus/bus-control.c
+++ b/src/libsystemd/sd-bus/bus-control.c
@@ -59,11 +59,14 @@ static int bus_request_name_kernel(sd_bus *bus, const char *name, uint64_t flags
assert(name);
l = strlen(name);
- size = offsetof(struct kdbus_cmd_name, name) + l + 1;
+ size = offsetof(struct kdbus_cmd_name, items) + KDBUS_ITEM_SIZE(l + 1);
n = alloca0_align(size, 8);
n->size = size;
kdbus_translate_request_name_flags(flags, (uint64_t *) &n->flags);
- memcpy(n->name, name, l+1);
+
+ n->items[0].size = KDBUS_ITEM_HEADER_SIZE + l + 1;
+ n->items[0].type = KDBUS_ITEM_NAME;
+ memcpy(n->items[0].str, name, l+1);
#ifdef HAVE_VALGRIND_MEMCHECK_H
VALGRIND_MAKE_MEM_DEFINED(n, n->size);
@@ -144,16 +147,20 @@ _public_ int sd_bus_request_name(sd_bus *bus, const char *name, uint64_t flags)
static int bus_release_name_kernel(sd_bus *bus, const char *name) {
struct kdbus_cmd_name *n;
- size_t l;
+ size_t size, l;
int r;
assert(bus);
assert(name);
l = strlen(name);
- n = alloca0_align(offsetof(struct kdbus_cmd_name, name) + l + 1, 8);
- n->size = offsetof(struct kdbus_cmd_name, name) + l + 1;
- memcpy(n->name, name, l+1);
+ size = offsetof(struct kdbus_cmd_name, items) + KDBUS_ITEM_SIZE(l + 1);
+ n = alloca0_align(size, 8);
+ n->size = size;
+
+ n->items[0].size = KDBUS_ITEM_HEADER_SIZE + l + 1;
+ n->items[0].type = KDBUS_ITEM_NAME;
+ memcpy(n->items[0].str, name, l+1);
#ifdef HAVE_VALGRIND_MEMCHECK_H
VALGRIND_MAKE_MEM_DEFINED(n, n->size);
@@ -235,6 +242,9 @@ static int kernel_get_list(sd_bus *bus, uint64_t flags, char ***x) {
KDBUS_ITEM_FOREACH(name, name_list, names) {
+ struct kdbus_item *item;
+ const char *entry_name = NULL;
+
if ((flags & KDBUS_NAME_LIST_UNIQUE) && name->owner_id != previous_id) {
char *n;
@@ -248,8 +258,12 @@ static int kernel_get_list(sd_bus *bus, uint64_t flags, char ***x) {
previous_id = name->owner_id;
}
- if (name->size > sizeof(*name) && service_name_is_valid(name->name)) {
- r = strv_extend(x, name->name);
+ KDBUS_ITEM_FOREACH(item, name, items)
+ if (item->type == KDBUS_ITEM_NAME)
+ entry_name = item->str;
+
+ if (entry_name && service_name_is_valid(entry_name)) {
+ r = strv_extend(x, entry_name);
if (r < 0)
return -ENOMEM;
}
diff --git a/src/libsystemd/sd-bus/kdbus.h b/src/libsystemd/sd-bus/kdbus.h
index 7379b3d442..0718b8497a 100644
--- a/src/libsystemd/sd-bus/kdbus.h
+++ b/src/libsystemd/sd-bus/kdbus.h
@@ -17,11 +17,8 @@
#ifndef _KDBUS_UAPI_H_
#define _KDBUS_UAPI_H_
-#ifndef __KERNEL__
-#include <sys/ioctl.h>
-#include <sys/types.h>
+#include <linux/ioctl.h>
#include <linux/types.h>
-#endif
#define KDBUS_IOCTL_MAGIC 0x95
#define KDBUS_SRC_ID_KERNEL (0)
@@ -121,7 +118,7 @@ struct kdbus_timestamp {
/**
* struct kdbus_vec - I/O vector for kdbus payload items
* @size: The size of the vector
- * @address: Memory address for memory addresses
+ * @address: Memory address of data buffer
* @offset: Offset in the in-message payload memory,
* relative to the message head
*
@@ -160,7 +157,7 @@ struct kdbus_bloom_filter {
* struct kdbus_memfd - a kdbus memfd
* @size: The memfd's size
* @fd: The file descriptor number
- * @__pad: Padding to ensure proper alignement and size
+ * @__pad: Padding to ensure proper alignment and size
*
* Attached to:
* KDBUS_ITEM_PAYLOAD_MEMFD
@@ -477,7 +474,7 @@ enum kdbus_policy_type {
/**
* enum kdbus_hello_flags - flags for struct kdbus_cmd_hello
- * @KDBUS_HELLO_ACCEPT_FD: The connection allows the receiving of
+ * @KDBUS_HELLO_ACCEPT_FD: The connection allows the reception of
* any passed file descriptors
* @KDBUS_HELLO_ACTIVATOR: Special-purpose connection which registers
* a well-know name for a process to be started
@@ -533,8 +530,7 @@ enum kdbus_attach_flags {
/**
* struct kdbus_cmd_hello - struct to say hello to kdbus
* @size: The total size of the structure
- * @conn_flags: Connection flags (KDBUS_HELLO_*). The kernel will
- * return its capabilities in that field.
+ * @conn_flags: Connection flags (KDBUS_HELLO_*).
* @attach_flags: Mask of metadata to attach to each message sent
* (KDBUS_ATTACH_*)
* @bus_flags: The flags field copied verbatim from the original
@@ -608,9 +604,10 @@ enum kdbus_name_flags {
* struct kdbus_cmd_name - struct to describe a well-known name
* @size: The total size of the struct
* @flags: Flags for a name entry (KDBUS_NAME_*)
- * @owner_id: The current owner of the name.
+ * @owner_id: The current owner of the name
* @conn_flags: The flags of the owning connection (KDBUS_HELLO_*)
- * @name: The well-known name
+ * @items: Item list, containing the well-known name as
+ * KDBUS_ITEM_NAME
*
* This structure is used with the KDBUS_CMD_NAME_ACQUIRE ioctl.
*/
@@ -619,7 +616,7 @@ struct kdbus_cmd_name {
__u64 flags;
__u64 owner_id;
__u64 conn_flags;
- char name[0];
+ struct kdbus_item items[0];
} __attribute__((aligned(8)));
/**
@@ -808,7 +805,7 @@ enum kdbus_ioctl_type {
KDBUS_CMD_NAME_RELEASE = _IOW(KDBUS_IOCTL_MAGIC, 0x51,
struct kdbus_cmd_name),
KDBUS_CMD_NAME_LIST = _IOWR(KDBUS_IOCTL_MAGIC, 0x52,
- struct kdbus_cmd_name_list),
+ struct kdbus_cmd_name_list),
KDBUS_CMD_CONN_INFO = _IOWR(KDBUS_IOCTL_MAGIC, 0x60,
struct kdbus_cmd_conn_info),
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