[systemd-commits] src/libsystemd-bus src/systemd
Lennart Poettering
lennart at kemper.freedesktop.org
Sat Apr 13 12:53:34 PDT 2013
src/libsystemd-bus/bus-kernel.c | 99 +++++++++++++++++++------------------
src/libsystemd-bus/bus-message.c | 71 ++++++++++++++++++++++++--
src/libsystemd-bus/bus-message.h | 9 ++-
src/libsystemd-bus/bus-socket.c | 11 ----
src/libsystemd-bus/kdbus.h | 11 ++--
src/libsystemd-bus/test-bus-chat.c | 2
src/systemd/sd-bus.h | 12 +++-
7 files changed, 143 insertions(+), 72 deletions(-)
New commits:
commit 69aec65cf8da55e400cf0a4f213b0a48268ca19f
Author: Lennart Poettering <lennart at poettering.net>
Date: Sat Apr 13 21:53:11 2013 +0200
kdbus: parse even more kernel meta data fields
diff --git a/src/libsystemd-bus/bus-kernel.c b/src/libsystemd-bus/bus-kernel.c
index f948b4e..ca47ea2 100644
--- a/src/libsystemd-bus/bus-kernel.c
+++ b/src/libsystemd-bus/bus-kernel.c
@@ -118,15 +118,16 @@ static int bus_message_setup_kmsg(sd_bus *b, sd_bus_message *m) {
sz = offsetof(struct kdbus_msg, data);
- /* Add in fixed header, fields header, fields header padding and payload */
- sz += 4 * ALIGN8(offsetof(struct kdbus_msg_data, vec) + sizeof(struct kdbus_vec));
+ /* Add in fixed header, fields header and payload */
+ sz += 3 * ALIGN8(offsetof(struct kdbus_msg_data, vec) + sizeof(struct kdbus_vec));
+ /* Add space for bloom filter */
sz += ALIGN8(offsetof(struct kdbus_msg_data, data) + b->bloom_size);
/* Add in well-known destination header */
if (well_known) {
dl = strlen(m->destination);
- sz += ALIGN8(offsetof(struct kdbus_msg, data) + dl + 1);
+ sz += ALIGN8(offsetof(struct kdbus_msg_data, str) + dl + 1);
}
m->kdbus = aligned_alloc(8, sz);
@@ -153,15 +154,8 @@ static int bus_message_setup_kmsg(sd_bus *b, sd_bus_message *m) {
append_payload_vec(&d, m->header, sizeof(*m->header));
- if (m->fields) {
- append_payload_vec(&d, m->fields, m->header->fields_size);
-
- if (m->header->fields_size % 8 != 0) {
- static const uint8_t padding[7] = {};
-
- append_payload_vec(&d, padding, 8 - (m->header->fields_size % 8));
- }
- }
+ if (m->fields)
+ append_payload_vec(&d, m->fields, ALIGN8(m->header->fields_size));
if (m->body)
append_payload_vec(&d, m->body, m->header->body_size);
@@ -184,7 +178,18 @@ static int bus_message_setup_kmsg(sd_bus *b, sd_bus_message *m) {
}
int bus_kernel_take_fd(sd_bus *b) {
- struct kdbus_cmd_hello hello = {};
+ struct kdbus_cmd_hello hello = {
+ .conn_flags =
+ KDBUS_CMD_HELLO_ACCEPT_FD|
+ KDBUS_CMD_HELLO_ACCEPT_MMAP|
+ KDBUS_CMD_HELLO_ATTACH_COMM|
+ KDBUS_CMD_HELLO_ATTACH_EXE|
+ KDBUS_CMD_HELLO_ATTACH_CMDLINE|
+ KDBUS_CMD_HELLO_ATTACH_CGROUP|
+ KDBUS_CMD_HELLO_ATTACH_CAPS|
+ KDBUS_CMD_HELLO_ATTACH_SECLABEL|
+ KDBUS_CMD_HELLO_ATTACH_AUDIT
+ };
int r;
assert(b);
@@ -271,9 +276,7 @@ static int bus_kernel_make_message(sd_bus *bus, struct kdbus_msg *k, sd_bus_mess
_cleanup_free_ int *fds = NULL;
struct bus_header *h = NULL;
size_t total, n_bytes = 0, idx = 0;
- struct kdbus_creds *creds = NULL;
- uint64_t nsec = 0;
- const char *destination = NULL;
+ const char *destination = NULL, *seclabel = NULL;
int r;
assert(bus);
@@ -313,12 +316,10 @@ static int bus_kernel_make_message(sd_bus *bus, struct kdbus_msg *k, sd_bus_mess
memcpy(fds + n_fds, d->fds, j);
n_fds += j;
- } else if (d->type == KDBUS_MSG_SRC_CREDS)
- creds = &d->creds;
- else if (d->type == KDBUS_MSG_TIMESTAMP)
- nsec = d->ts_ns;
- else if (d->type == KDBUS_MSG_DST_NAME)
+ } else if (d->type == KDBUS_MSG_DST_NAME)
destination = d->str;
+ else if (d->type == KDBUS_MSG_SRC_SECLABEL)
+ seclabel = d->str;
}
if (!h)
@@ -331,42 +332,46 @@ static int bus_kernel_make_message(sd_bus *bus, struct kdbus_msg *k, sd_bus_mess
if (n_bytes != total)
return -EBADMSG;
- r = bus_message_from_header(h, sizeof(struct bus_header), fds, n_fds, NULL, NULL, 0, &m);
+ r = bus_message_from_header(h, sizeof(struct bus_header), fds, n_fds, NULL, seclabel, 0, &m);
if (r < 0)
return r;
KDBUS_MSG_FOREACH_DATA(d, k) {
size_t l;
- if (d->type != KDBUS_MSG_PAYLOAD)
- continue;
-
l = d->size - offsetof(struct kdbus_msg_data, data);
- if (idx == sizeof(struct bus_header) &&
- l == BUS_MESSAGE_FIELDS_SIZE(m))
- m->fields = d->data;
- else if (idx == sizeof(struct bus_header) + ALIGN8(BUS_MESSAGE_FIELDS_SIZE(m)) &&
- l == BUS_MESSAGE_BODY_SIZE(m))
- m->body = d->data;
- else if (!(idx == 0 && l == sizeof(struct bus_header)) &&
- !(idx == sizeof(struct bus_header) + BUS_MESSAGE_FIELDS_SIZE(m))) {
- sd_bus_message_unref(m);
- return -EBADMSG;
- }
- idx += l;
- }
+ if (d->type == KDBUS_MSG_PAYLOAD) {
- if (creds) {
- m->pid_starttime = creds->starttime / NSEC_PER_USEC;
- m->uid = creds->uid;
- m->gid = creds->gid;
- m->pid = creds->pid;
- m->tid = creds->tid;
- m->uid_valid = m->gid_valid = true;
- }
+ if (idx == sizeof(struct bus_header) &&
+ l == ALIGN8(BUS_MESSAGE_FIELDS_SIZE(m)))
+ m->fields = d->data;
+ else if (idx == sizeof(struct bus_header) + ALIGN8(BUS_MESSAGE_FIELDS_SIZE(m)) &&
+ l == BUS_MESSAGE_BODY_SIZE(m))
+ m->body = d->data;
+ else if (!(idx == 0 && l == sizeof(struct bus_header))) {
+ sd_bus_message_unref(m);
+ return -EBADMSG;
+ }
- m->timestamp = nsec / NSEC_PER_USEC;
+ idx += l;
+ } else if (d->type == KDBUS_MSG_SRC_CREDS) {
+ m->pid_starttime = d->creds.starttime / NSEC_PER_USEC;
+ m->uid = d->creds.uid;
+ m->gid = d->creds.gid;
+ m->pid = d->creds.pid;
+ m->tid = d->creds.tid;
+ m->uid_valid = m->gid_valid = true;
+ } else if (d->type == KDBUS_MSG_TIMESTAMP) {
+ m->realtime = d->timestamp.realtime_ns / NSEC_PER_USEC;
+ m->monotonic = d->timestamp.monotonic_ns / NSEC_PER_USEC;
+ } else if (d->type == KDBUS_MSG_SRC_PID_COMM)
+ m->comm = d->str;
+ else if (d->type == KDBUS_MSG_SRC_TID_COMM)
+ m->tid_comm = d->str;
+ else if (d->type == KDBUS_MSG_SRC_EXE)
+ m->exe = d->str;
+ }
r = bus_message_parse_fields(m);
if (r < 0) {
diff --git a/src/libsystemd-bus/bus-message.c b/src/libsystemd-bus/bus-message.c
index 467b519..bae0812 100644
--- a/src/libsystemd-bus/bus-message.c
+++ b/src/libsystemd-bus/bus-message.c
@@ -702,24 +702,56 @@ int sd_bus_message_get_pid_starttime(sd_bus_message *m, uint64_t *usec) {
return 0;
}
-const char *sd_bus_message_get_label(sd_bus_message *m) {
+const char *sd_bus_message_get_selinux_context(sd_bus_message *m) {
if (!m)
return NULL;
return m->label;
}
-int sd_bus_message_get_timestamp(sd_bus_message *m, uint64_t *usec) {
+int sd_bus_message_get_monotonic_timestamp(sd_bus_message *m, uint64_t *usec) {
if (!m)
return -EINVAL;
- if (m->timestamp <= 0)
+ if (m->monotonic <= 0)
return -ENOENT;
- *usec = m->timestamp;
+ *usec = m->monotonic;
return 0;
}
+int sd_bus_message_get_realtime_timestamp(sd_bus_message *m, uint64_t *usec) {
+ if (!m)
+ return -EINVAL;
+
+ if (m->realtime <= 0)
+ return -ENOENT;
+
+ *usec = m->realtime;
+ return 0;
+}
+
+const char *sd_bus_message_get_comm(sd_bus_message *m) {
+ if (!m)
+ return NULL;
+
+ return m->comm;
+}
+
+const char *sd_bus_message_get_tid_comm(sd_bus_message *m) {
+ if (!m)
+ return NULL;
+
+ return m->tid_comm;
+}
+
+const char *sd_bus_message_get_exe(sd_bus_message *m) {
+ if (!m)
+ return NULL;
+
+ return m->exe;
+}
+
int sd_bus_message_is_signal(sd_bus_message *m, const char *interface, const char *member) {
if (!m)
return -EINVAL;
@@ -2837,6 +2869,7 @@ int bus_message_parse_fields(sd_bus_message *m) {
int bus_message_seal(sd_bus_message *m, uint64_t serial) {
int r;
+ size_t l, a;
assert(m);
@@ -2859,6 +2892,22 @@ int bus_message_seal(sd_bus_message *m, uint64_t serial) {
return r;
}
+ l = BUS_MESSAGE_FIELDS_SIZE(m);
+ a = ALIGN8(l) - l;
+
+ if (a > 0) {
+ /* Add padding at the end, since we know the body
+ * needs to start at an 8 byte alignment. */
+ void *p;
+
+ p = message_extend_fields(m, 1, a);
+ if (!p)
+ return -ENOMEM;
+
+ memset(p, 0, a);
+ m->header->fields_size -= a;
+ }
+
m->header->serial = serial;
m->sealed = true;
@@ -2933,8 +2982,18 @@ int bus_message_dump(sd_bus_message *m) {
printf("\tgid=%lu\n", (unsigned long) m->gid);
if (m->pid_starttime != 0)
printf("\tpid_starttime=%llu\n", (unsigned long long) m->pid_starttime);
- if (m->timestamp)
- printf("\ttimestamp=%llu\n", (unsigned long long) m->timestamp);
+ if (m->monotonic != 0)
+ printf("\tmonotonic=%llu\n", (unsigned long long) m->monotonic);
+ if (m->realtime != 0)
+ printf("\trealtime=%llu\n", (unsigned long long) m->realtime);
+ if (m->exe)
+ printf("\texe=[%s]\n", m->exe);
+ if (m->comm)
+ printf("\tcomm=[%s]\n", m->comm);
+ if (m->tid_comm)
+ printf("\ttid_comm=[%s]\n", m->tid_comm);
+ if (m->label)
+ printf("\tlabel=[%s]\n", m->label);
r = sd_bus_message_rewind(m, true);
if (r < 0) {
diff --git a/src/libsystemd-bus/bus-message.h b/src/libsystemd-bus/bus-message.h
index 8eea46b..1c40377 100644
--- a/src/libsystemd-bus/bus-message.h
+++ b/src/libsystemd-bus/bus-message.h
@@ -68,7 +68,8 @@ struct sd_bus_message {
pid_t pid;
pid_t tid;
usec_t pid_starttime;
- usec_t timestamp;
+ usec_t monotonic;
+ usec_t realtime;
bool sealed:1;
bool dont_send:1;
@@ -96,7 +97,7 @@ struct sd_bus_message {
struct bus_container root_container, *containers;
unsigned n_containers;
- struct iovec iovec[4];
+ struct iovec iovec[3];
unsigned n_iovec;
char *peeked_signature;
@@ -105,6 +106,10 @@ struct sd_bus_message {
char sender_buffer[3 + DECIMAL_STR_MAX(uint64_t) + 1];
char destination_buffer[3 + DECIMAL_STR_MAX(uint64_t) + 1];
+
+ const char *exe;
+ const char *comm;
+ const char *tid_comm;
};
#define BUS_MESSAGE_NEED_BSWAP(m) ((m)->header->endian != SD_BUS_NATIVE_ENDIAN)
diff --git a/src/libsystemd-bus/bus-socket.c b/src/libsystemd-bus/bus-socket.c
index bce81ae..8a86b02 100644
--- a/src/libsystemd-bus/bus-socket.c
+++ b/src/libsystemd-bus/bus-socket.c
@@ -77,15 +77,8 @@ static void bus_message_setup_iovec(sd_bus_message *m) {
append_iovec(m, m->header, sizeof(*m->header));
- if (m->fields) {
- append_iovec(m, m->fields, m->header->fields_size);
-
- if (m->header->fields_size % 8 != 0) {
- static const uint8_t padding[7] = {};
-
- append_iovec(m, padding, 8 - (m->header->fields_size % 8));
- }
- }
+ if (m->fields)
+ append_iovec(m, m->fields, ALIGN8(m->header->fields_size));
if (m->body)
append_iovec(m, m->body, m->header->body_size);
diff --git a/src/libsystemd-bus/kdbus.h b/src/libsystemd-bus/kdbus.h
index 8c643fe..441bfab 100644
--- a/src/libsystemd-bus/kdbus.h
+++ b/src/libsystemd-bus/kdbus.h
@@ -53,6 +53,11 @@ struct kdbus_audit {
__u64 loginuid;
};
+struct kdbus_timestamp {
+ __u64 monotonic_ns;
+ __u64 realtime_ns;
+};
+
#define KDBUS_SRC_ID_KERNEL (0)
#define KDBUS_DST_ID_WELL_KNOWN_NAME (0)
#define KDBUS_MATCH_SRC_ID_ANY (~0ULL)
@@ -70,7 +75,7 @@ enum {
/* Filled in by kernelspace */
KDBUS_MSG_SRC_NAMES = 0x200,/* NUL separated string list with well-known names of source */
- KDBUS_MSG_TIMESTAMP, /* .ts_ns of CLOCK_MONOTONIC */
+ KDBUS_MSG_TIMESTAMP, /* .timestamp */
KDBUS_MSG_SRC_CREDS, /* .creds */
KDBUS_MSG_SRC_PID_COMM, /* optional, in .str */
KDBUS_MSG_SRC_TID_COMM, /* optional, in .str */
@@ -110,17 +115,15 @@ struct kdbus_msg_data {
/* inline data */
__u8 data[0];
char str[0];
- __u32 data_u32[0];
- __u64 data_u64[0];
/* data vector */
struct kdbus_vec vec;
/* specific fields */
int fds[0]; /* int array of file descriptors */
- __u64 ts_ns; /* timestamp in nanoseconds */
struct kdbus_creds creds;
struct kdbus_audit audit;
+ struct kdbus_timestamp timestamp;
struct kdbus_manager_msg_name_change name_change;
struct kdbus_manager_msg_id_change id_change;
};
diff --git a/src/libsystemd-bus/test-bus-chat.c b/src/libsystemd-bus/test-bus-chat.c
index 371c7a7..9f4a559 100644
--- a/src/libsystemd-bus/test-bus-chat.c
+++ b/src/libsystemd-bus/test-bus-chat.c
@@ -159,7 +159,7 @@ static int server(sd_bus *bus) {
continue;
sd_bus_message_get_pid(m, &pid);
- log_info("Got message! member=%s pid=%lu label=%s", strna(sd_bus_message_get_member(m)), (unsigned long) pid, strna(sd_bus_message_get_label(m)));
+ log_info("Got message! member=%s pid=%lu label=%s", strna(sd_bus_message_get_member(m)), (unsigned long) pid, strna(sd_bus_message_get_selinux_context(m)));
/* bus_message_dump(m); */
/* sd_bus_message_rewind(m, true); */
diff --git a/src/systemd/sd-bus.h b/src/systemd/sd-bus.h
index 91445bb..70d41eb 100644
--- a/src/systemd/sd-bus.h
+++ b/src/systemd/sd-bus.h
@@ -33,11 +33,13 @@ extern "C" {
#endif
/* TODO:
- * - instead of adding in padding iovec when sending simply extend header buffer
* - add page donation logic
* - api for appending/reading fixed arrays
* - merge busctl into systemctl or so?
* - default policy (allow uid == 0 and our own uid)
+ *
+ * - enforce alignment of pointers passed in
+ * - negotiation for attach attributes
*/
typedef struct sd_bus sd_bus;
@@ -121,13 +123,17 @@ const char *sd_bus_message_get_destination(sd_bus_message *m);
const char *sd_bus_message_get_sender(sd_bus_message *m);
const sd_bus_error *sd_bus_message_get_error(sd_bus_message *m);
+int sd_bus_message_get_monotonic_timestamp(sd_bus_message *m, uint64_t *usec);
+int sd_bus_message_get_realtime_timestamp(sd_bus_message *m, uint64_t *usec);
int sd_bus_message_get_uid(sd_bus_message *m, uid_t *uid);
int sd_bus_message_get_gid(sd_bus_message *m, gid_t *gid);
int sd_bus_message_get_pid(sd_bus_message *m, pid_t *pid);
int sd_bus_message_get_tid(sd_bus_message *m, pid_t *tid);
int sd_bus_message_get_pid_starttime(sd_bus_message *m, uint64_t *usec);
-const char *sd_bus_message_get_label(sd_bus_message *m);
-int sd_bus_message_get_timestamp(sd_bus_message *m, uint64_t *usec);
+const char *sd_bus_message_get_selinux_context(sd_bus_message *m);
+const char *sd_bus_message_get_comm(sd_bus_message *m);
+const char *sd_bus_message_get_tid_comm(sd_bus_message *m);
+const char *sd_bus_message_get_exe(sd_bus_message *m);
int sd_bus_message_is_signal(sd_bus_message *m, const char *interface, const char *member);
int sd_bus_message_is_method_call(sd_bus_message *m, const char *interface, const char *member);
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