diff options
Diffstat (limited to 'src/libsystemd/sd-bus')
| -rw-r--r-- | src/libsystemd/sd-bus/bus-control.c | 140 | ||||
| -rw-r--r-- | src/libsystemd/sd-bus/bus-kernel.c | 23 | ||||
| -rw-r--r-- | src/libsystemd/sd-bus/bus-kernel.h | 2 |
3 files changed, 97 insertions, 68 deletions
diff --git a/src/libsystemd/sd-bus/bus-control.c b/src/libsystemd/sd-bus/bus-control.c index e6e905c0e0..71fdbcf948 100644 --- a/src/libsystemd/sd-bus/bus-control.c +++ b/src/libsystemd/sd-bus/bus-control.c @@ -223,23 +223,6 @@ _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; @@ -293,7 +276,7 @@ static int kernel_get_list(sd_bus *bus, uint64_t flags, char ***x) { r = 0; fail: - kernel_cmd_free(bus, cmd.offset); + bus_kernel_cmd_free(bus, cmd.offset); return r; } @@ -715,7 +698,7 @@ static int bus_get_name_creds_kdbus( r = 0; fail: - kernel_cmd_free(bus, cmd->offset); + bus_kernel_cmd_free(bus, cmd->offset); return r; } @@ -897,18 +880,58 @@ _public_ int sd_bus_get_name_creds( return bus_get_name_creds_dbus1(bus, name, mask, creds); } -_public_ int sd_bus_get_owner_creds(sd_bus *bus, uint64_t mask, sd_bus_creds **ret) { +static int bus_get_owner_creds_kdbus(sd_bus *bus, uint64_t mask, sd_bus_creds **ret) { _cleanup_bus_creds_unref_ sd_bus_creds *c = NULL; + struct kdbus_cmd_info cmd = { + .size = sizeof(struct kdbus_cmd_info) + }; + struct kdbus_info *creator_info; pid_t pid = 0; int r; - assert_return(bus, -EINVAL); - assert_return((mask & ~SD_BUS_CREDS_AUGMENT) <= _SD_BUS_CREDS_ALL, -ENOTSUP); - assert_return(ret, -EINVAL); - assert_return(!bus_pid_changed(bus), -ECHILD); + c = bus_creds_new(); + if (!c) + return -ENOMEM; - if (!BUS_IS_OPEN(bus->state)) - return -ENOTCONN; + cmd.flags = attach_flags_to_kdbus(mask); + + /* If augmentation is on, and the bus doesn't didn't allow us + * to get the bits we want, then ask for the PID/TID so that we + * can read the rest from /proc. */ + if ((mask & SD_BUS_CREDS_AUGMENT) && + (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| + SD_BUS_CREDS_COMM|SD_BUS_CREDS_TID_COMM|SD_BUS_CREDS_EXE|SD_BUS_CREDS_CMDLINE| + SD_BUS_CREDS_CGROUP|SD_BUS_CREDS_UNIT|SD_BUS_CREDS_USER_UNIT|SD_BUS_CREDS_SLICE|SD_BUS_CREDS_SESSION|SD_BUS_CREDS_OWNER_UID| + SD_BUS_CREDS_EFFECTIVE_CAPS|SD_BUS_CREDS_PERMITTED_CAPS|SD_BUS_CREDS_INHERITABLE_CAPS|SD_BUS_CREDS_BOUNDING_CAPS| + SD_BUS_CREDS_SELINUX_CONTEXT| + SD_BUS_CREDS_AUDIT_SESSION_ID|SD_BUS_CREDS_AUDIT_LOGIN_UID))) + cmd.flags |= KDBUS_ATTACH_PIDS; + + r = ioctl(bus->input_fd, KDBUS_CMD_BUS_CREATOR_INFO, &cmd); + if (r < 0) + return -errno; + + creator_info = (struct kdbus_info *) ((uint8_t *) bus->kdbus_buffer + cmd.offset); + + r = bus_populate_creds_from_items(bus, creator_info, mask, c); + bus_kernel_cmd_free(bus, cmd.offset); + if (r < 0) + return r; + + r = bus_creds_add_more(c, mask, pid, 0); + if (r < 0) + return r; + + *ret = c; + c = NULL; + return 0; +} + +static int bus_get_owner_creds_dbus1(sd_bus *bus, uint64_t mask, sd_bus_creds **ret) { + _cleanup_bus_creds_unref_ sd_bus_creds *c = NULL; + pid_t pid = 0; + int r; if (!bus->ucred_valid && !isempty(bus->label)) return -ENODATA; @@ -918,11 +941,20 @@ _public_ int sd_bus_get_owner_creds(sd_bus *bus, uint64_t mask, sd_bus_creds **r return -ENOMEM; if (bus->ucred_valid) { - pid = c->pid = bus->ucred.pid; - c->uid = bus->ucred.uid; - c->gid = bus->ucred.gid; + if (bus->ucred.pid > 0) { + pid = c->pid = bus->ucred.pid; + c->mask |= SD_BUS_CREDS_PID & mask; + } + + if (bus->ucred.uid != (uid_t) -1) { + c->uid = bus->ucred.uid; + c->mask |= SD_BUS_CREDS_UID & mask; + } - c->mask |= (SD_BUS_CREDS_UID | SD_BUS_CREDS_PID | SD_BUS_CREDS_GID) & mask; + if (bus->ucred.gid != (gid_t) -1) { + c->gid = bus->ucred.gid; + c->mask |= SD_BUS_CREDS_GID & mask; + } } if (!isempty(bus->label) && (mask & SD_BUS_CREDS_SELINUX_CONTEXT)) { @@ -933,39 +965,6 @@ _public_ int sd_bus_get_owner_creds(sd_bus *bus, uint64_t mask, sd_bus_creds **r c->mask |= SD_BUS_CREDS_SELINUX_CONTEXT; } - if (bus->is_kernel) { - struct kdbus_cmd_info cmd = {}; - struct kdbus_info *creator_info; - - cmd.size = sizeof(cmd); - cmd.flags = attach_flags_to_kdbus(mask); - - /* If augmentation is on, and the bus doesn't didn't allow us - * to get the bits we want, then ask for the PID/TID so that we - * can read the rest from /proc. */ - if ((mask & SD_BUS_CREDS_AUGMENT) && - (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| - SD_BUS_CREDS_COMM|SD_BUS_CREDS_TID_COMM|SD_BUS_CREDS_EXE|SD_BUS_CREDS_CMDLINE| - SD_BUS_CREDS_CGROUP|SD_BUS_CREDS_UNIT|SD_BUS_CREDS_USER_UNIT|SD_BUS_CREDS_SLICE|SD_BUS_CREDS_SESSION|SD_BUS_CREDS_OWNER_UID| - SD_BUS_CREDS_EFFECTIVE_CAPS|SD_BUS_CREDS_PERMITTED_CAPS|SD_BUS_CREDS_INHERITABLE_CAPS|SD_BUS_CREDS_BOUNDING_CAPS| - SD_BUS_CREDS_SELINUX_CONTEXT| - SD_BUS_CREDS_AUDIT_SESSION_ID|SD_BUS_CREDS_AUDIT_LOGIN_UID))) - cmd.flags |= KDBUS_ATTACH_PIDS; - - r = ioctl(bus->input_fd, KDBUS_CMD_BUS_CREATOR_INFO, &cmd); - if (r < 0) - return -errno; - - creator_info = (struct kdbus_info *) ((uint8_t *) bus->kdbus_buffer + cmd.offset); - - r = bus_populate_creds_from_items(bus, creator_info, mask, c); - kernel_cmd_free(bus, cmd.offset); - - if (r < 0) - return r; - } - r = bus_creds_add_more(c, mask, pid, 0); if (r < 0) return r; @@ -975,6 +974,21 @@ _public_ int sd_bus_get_owner_creds(sd_bus *bus, uint64_t mask, sd_bus_creds **r return 0; } +_public_ int sd_bus_get_owner_creds(sd_bus *bus, uint64_t mask, sd_bus_creds **ret) { + assert_return(bus, -EINVAL); + assert_return((mask & ~SD_BUS_CREDS_AUGMENT) <= _SD_BUS_CREDS_ALL, -ENOTSUP); + assert_return(ret, -EINVAL); + assert_return(!bus_pid_changed(bus), -ECHILD); + + if (!BUS_IS_OPEN(bus->state)) + return -ENOTCONN; + + if (bus->is_kernel) + return bus_get_owner_creds_kdbus(bus, mask, ret); + else + return bus_get_owner_creds_dbus1(bus, mask, ret); +} + static int add_name_change_match(sd_bus *bus, uint64_t cookie, const char *name, diff --git a/src/libsystemd/sd-bus/bus-kernel.c b/src/libsystemd/sd-bus/bus-kernel.c index 5b4bbfd1ea..c86ed6ae42 100644 --- a/src/libsystemd/sd-bus/bus-kernel.c +++ b/src/libsystemd/sd-bus/bus-kernel.c @@ -954,24 +954,37 @@ int bus_kernel_connect(sd_bus *b) { return bus_kernel_take_fd(b); } +int bus_kernel_cmd_free(sd_bus *bus, uint64_t offset) { + struct kdbus_cmd_free cmd = { + .flags = 0, + .offset = offset, + }; + int r; + + assert(bus); + assert(bus->is_kernel); + + r = ioctl(bus->input_fd, KDBUS_CMD_FREE, &cmd); + if (r < 0) + return -errno; + + return 0; +} + static void close_kdbus_msg(sd_bus *bus, struct kdbus_msg *k) { - struct kdbus_cmd_free cmd = {}; struct kdbus_item *d; assert(bus); assert(k); - cmd.offset = (uint8_t *)k - (uint8_t *)bus->kdbus_buffer; - KDBUS_ITEM_FOREACH(d, k, items) { - if (d->type == KDBUS_ITEM_FDS) close_many(d->fds, (d->size - offsetof(struct kdbus_item, fds)) / sizeof(int)); else if (d->type == KDBUS_ITEM_PAYLOAD_MEMFD) safe_close(d->memfd.fd); } - (void) ioctl(bus->input_fd, KDBUS_CMD_FREE, &cmd); + bus_kernel_cmd_free(bus, (uint8_t*) k - (uint8_t*) bus->kdbus_buffer); } int bus_kernel_write_message(sd_bus *bus, sd_bus_message *m, bool hint_sync_call) { diff --git a/src/libsystemd/sd-bus/bus-kernel.h b/src/libsystemd/sd-bus/bus-kernel.h index 0db8fd35a7..0d406fbc81 100644 --- a/src/libsystemd/sd-bus/bus-kernel.h +++ b/src/libsystemd/sd-bus/bus-kernel.h @@ -91,3 +91,5 @@ int bus_kernel_drop_one(int fd); int bus_kernel_realize_attach_flags(sd_bus *bus); int bus_kernel_fix_attach_mask(void); + +int bus_kernel_cmd_free(sd_bus *bus, uint64_t offset); |