chiark / gitweb /
sd-bus: update to current kernel version, by splitting off the extended KDBUS_ITEM_PI...
[elogind.git] / src / libsystemd / sd-bus / bus-kernel.c
index 5e7bc122392ac8f7b1823a609b1f6e8443524095..79d29dc119798b0da25e319fdf65a9dd3d207dae 100644 (file)
@@ -513,28 +513,75 @@ static int bus_kernel_make_message(sd_bus *bus, struct kdbus_msg *k) {
                         break;
                 }
 
-                case KDBUS_ITEM_CREDS:
-                        /* UID/GID/PID are always valid */
-                        m->creds.uid = (uid_t) d->creds.uid;
-                        m->creds.gid = (gid_t) d->creds.gid;
-                        m->creds.pid = (pid_t) d->creds.pid;
-                        m->creds.mask |= (SD_BUS_CREDS_UID|SD_BUS_CREDS_GID|SD_BUS_CREDS_PID) & bus->creds_mask;
-
-                        /* The PID starttime/TID might be missing
-                         * however, when the data is faked by some
-                         * data bus proxy and it lacks that
-                         * information about the real client since
-                         * SO_PEERCRED is used for that */
-
-                        if (d->creds.starttime > 0) {
-                                m->creds.pid_starttime = d->creds.starttime / NSEC_PER_USEC;
+                case KDBUS_ITEM_PIDS:
+
+                        /* The PID starttime/TID might be missing,
+                         * when the data is faked by some data bus
+                         * proxy and it lacks that information about
+                         * the real client since SO_PEERCRED is used
+                         * for that. */
+
+                        if (d->pids.pid > 0) {
+                                m->creds.pid = (pid_t) d->pids.pid;
+                                m->creds.mask |= SD_BUS_CREDS_PID & bus->creds_mask;
+                        }
+
+                        if (d->pids.starttime > 0) {
+                                m->creds.pid_starttime = d->pids.starttime / NSEC_PER_USEC;
                                 m->creds.mask |= SD_BUS_CREDS_PID_STARTTIME & bus->creds_mask;
                         }
 
-                        if (d->creds.tid > 0) {
-                                m->creds.tid = (pid_t) d->creds.tid;
+                        if (d->pids.tid > 0) {
+                                m->creds.tid = (pid_t) d->pids.tid;
                                 m->creds.mask |= SD_BUS_CREDS_TID & bus->creds_mask;
                         }
+
+                        break;
+
+                case KDBUS_ITEM_CREDS:
+
+                        /* EUID/SUID/FSUID/EGID/SGID/FSGID might be missing too (see above). */
+
+                        if ((uid_t) d->creds.uid != (uid_t) -1) {
+                                m->creds.uid = (uid_t) d->creds.uid;
+                                m->creds.mask |= SD_BUS_CREDS_UID & bus->creds_mask;
+                        }
+
+                        if ((uid_t) d->creds.euid != (uid_t) -1) {
+                                m->creds.euid = (uid_t) d->creds.euid;
+                                m->creds.mask |= SD_BUS_CREDS_EUID & bus->creds_mask;
+                        }
+
+                        if ((uid_t) d->creds.suid != (uid_t) -1) {
+                                m->creds.suid = (uid_t) d->creds.suid;
+                                m->creds.mask |= SD_BUS_CREDS_SUID & bus->creds_mask;
+                        }
+
+                        if ((uid_t) d->creds.fsuid != (uid_t) -1) {
+                                m->creds.fsuid = (uid_t) d->creds.fsuid;
+                                m->creds.mask |= SD_BUS_CREDS_FSUID & bus->creds_mask;
+                        }
+
+                        if ((gid_t) d->creds.gid != (gid_t) -1) {
+                                m->creds.gid = (gid_t) d->creds.gid;
+                                m->creds.mask |= SD_BUS_CREDS_GID & bus->creds_mask;
+                        }
+
+                        if ((gid_t) d->creds.egid != (gid_t) -1) {
+                                m->creds.egid = (gid_t) d->creds.egid;
+                                m->creds.mask |= SD_BUS_CREDS_EGID & bus->creds_mask;
+                        }
+
+                        if ((gid_t) d->creds.sgid != (gid_t) -1) {
+                                m->creds.sgid = (gid_t) d->creds.sgid;
+                                m->creds.mask |= SD_BUS_CREDS_SGID & bus->creds_mask;
+                        }
+
+                        if ((gid_t) d->creds.fsgid != (gid_t) -1) {
+                                m->creds.fsgid = (gid_t) d->creds.fsgid;
+                                m->creds.mask |= SD_BUS_CREDS_FSGID & bus->creds_mask;
+                        }
+
                         break;
 
                 case KDBUS_ITEM_TIMESTAMP:
@@ -724,6 +771,9 @@ int bus_kernel_take_fd(sd_bus *b) {
         if (b->fake_creds_valid)
                 sz += ALIGN8(offsetof(struct kdbus_item, creds) + sizeof(struct kdbus_creds));
 
+        if (b->fake_pids_valid)
+                sz += ALIGN8(offsetof(struct kdbus_item, pids) + sizeof(struct kdbus_pids));
+
         if (b->fake_label) {
                 l = strlen(b->fake_label);
                 sz += ALIGN8(offsetof(struct kdbus_item, str) + l + 1);
@@ -751,6 +801,14 @@ int bus_kernel_take_fd(sd_bus *b) {
                 item = KDBUS_ITEM_NEXT(item);
         }
 
+        if (b->fake_pids_valid) {
+                item->size = offsetof(struct kdbus_item, pids) + sizeof(struct kdbus_pids);
+                item->type = KDBUS_ITEM_PIDS;
+                item->pids = b->fake_pids;
+
+                item = KDBUS_ITEM_NEXT(item);
+        }
+
         if (b->fake_label) {
                 item->size = offsetof(struct kdbus_item, str) + l + 1;
                 item->type = KDBUS_ITEM_SECLABEL;
@@ -1237,9 +1295,13 @@ int kdbus_translate_attach_flags(uint64_t mask, uint64_t *kdbus_mask) {
 
         assert(kdbus_mask);
 
-        if (mask & (SD_BUS_CREDS_UID|SD_BUS_CREDS_GID|SD_BUS_CREDS_PID|SD_BUS_CREDS_PID_STARTTIME|SD_BUS_CREDS_TID))
+        if (mask & (SD_BUS_CREDS_UID|SD_BUS_CREDS_EUID|SD_BUS_CREDS_SUID|SD_BUS_CREDS_FSUID|
+                    SD_BUS_CREDS_GID|SD_BUS_CREDS_EGID|SD_BUS_CREDS_SGID|SD_BUS_CREDS_FSGID))
                 m |= KDBUS_ATTACH_CREDS;
 
+        if (mask & (SD_BUS_CREDS_PID|SD_BUS_CREDS_PID_STARTTIME|SD_BUS_CREDS_TID))
+                m |= KDBUS_ATTACH_PIDS;
+
         if (mask & SD_BUS_CREDS_COMM)
                 m |= KDBUS_ATTACH_PID_COMM;
 
@@ -1282,7 +1344,7 @@ int bus_kernel_create_bus(const char *name, bool world, char **s) {
         assert(name);
         assert(s);
 
-        fd = open("/dev/kdbus/control", O_RDWR|O_NOCTTY|O_CLOEXEC);
+        fd = open("/sys/fs/kdbus/control", O_RDWR|O_NOCTTY|O_CLOEXEC);
         if (fd < 0)
                 return -errno;
 
@@ -1323,7 +1385,7 @@ int bus_kernel_create_bus(const char *name, bool world, char **s) {
         if (s) {
                 char *p;
 
-                p = strjoin("/dev/kdbus/", n->str, "/bus", NULL);
+                p = strjoin("/sys/fs/kdbus/", n->str, "/bus", NULL);
                 if (!p) {
                         safe_close(fd);
                         return -ENOMEM;
@@ -1403,7 +1465,7 @@ int bus_kernel_open_bus_fd(const char *bus, char **path) {
         int fd;
         size_t len;
 
-        len = strlen("/dev/kdbus/") + DECIMAL_STR_MAX(uid_t) + 1 + strlen(bus) + strlen("/bus") + 1;
+        len = strlen("/sys/fs/kdbus/") + DECIMAL_STR_MAX(uid_t) + 1 + strlen(bus) + strlen("/bus") + 1;
 
         if (path) {
                 p = malloc(len);
@@ -1412,7 +1474,7 @@ int bus_kernel_open_bus_fd(const char *bus, char **path) {
                 *path = p;
         } else
                 p = alloca(len);
-        sprintf(p, "/dev/kdbus/" UID_FMT "-%s/bus", getuid(), bus);
+        sprintf(p, "/sys/fs/kdbus/" UID_FMT "-%s/bus", getuid(), bus);
 
         fd = open(p, O_RDWR|O_NOCTTY|O_CLOEXEC);
         if (fd < 0)
@@ -1585,58 +1647,6 @@ int bus_kernel_make_starter(
         return fd;
 }
 
-int bus_kernel_create_domain(const char *name, char **s) {
-        struct kdbus_cmd_make *make;
-        struct kdbus_item *n;
-        int fd;
-
-        assert(name);
-        assert(s);
-
-        fd = open("/dev/kdbus/control", O_RDWR|O_NOCTTY|O_CLOEXEC);
-        if (fd < 0)
-                return -errno;
-
-        make = alloca0_align(ALIGN8(offsetof(struct kdbus_cmd_make, items) +
-                                    offsetof(struct kdbus_item, str) +
-                                    strlen(name) + 1),
-                             8);
-
-        n = make->items;
-        strcpy(n->str, name);
-        n->size = offsetof(struct kdbus_item, str) + strlen(n->str) + 1;
-        n->type = KDBUS_ITEM_MAKE_NAME;
-
-        make->size = ALIGN8(offsetof(struct kdbus_cmd_make, items) + n->size);
-        make->flags = KDBUS_MAKE_ACCESS_WORLD;
-
-        if (ioctl(fd, KDBUS_CMD_DOMAIN_MAKE, make) < 0) {
-                safe_close(fd);
-                return -errno;
-        }
-
-        /* The higher 32bit of the flags field are considered
-         * 'incompatible flags'. Refuse them all for now. */
-        if (make->flags > 0xFFFFFFFFULL) {
-                safe_close(fd);
-                return -ENOTSUP;
-        }
-
-        if (s) {
-                char *p;
-
-                p = strappend("/dev/kdbus/domain/", name);
-                if (!p) {
-                        safe_close(fd);
-                        return -ENOMEM;
-                }
-
-                *s = p;
-        }
-
-        return fd;
-}
-
 int bus_kernel_try_close(sd_bus *bus) {
         assert(bus);
         assert(bus->is_kernel);