diff options
Diffstat (limited to 'drivers/md/dm-ioctl.c')
| -rw-r--r-- | drivers/md/dm-ioctl.c | 32 |
1 files changed, 29 insertions, 3 deletions
diff --git a/drivers/md/dm-ioctl.c b/drivers/md/dm-ioctl.c index fb6f8fb1f13d..ac83f5002ce5 100644 --- a/drivers/md/dm-ioctl.c +++ b/drivers/md/dm-ioctl.c @@ -601,17 +601,27 @@ static void list_version_get_info(struct target_type *tt, void *param) info->vers = align_ptr(((void *) ++info->vers) + strlen(tt->name) + 1); } -static int list_versions(struct file *filp, struct dm_ioctl *param, size_t param_size) +static int __list_versions(struct dm_ioctl *param, size_t param_size, const char *name) { size_t len, needed = 0; struct dm_target_versions *vers; struct vers_iter iter_info; + struct target_type *tt = NULL; + + if (name) { + tt = dm_get_target_type(name); + if (!tt) + return -EINVAL; + } /* * Loop through all the devices working out how much * space we need. */ - dm_target_iterate(list_version_get_needed, &needed); + if (!tt) + dm_target_iterate(list_version_get_needed, &needed); + else + list_version_get_needed(tt, &needed); /* * Grab our output buffer. @@ -632,13 +642,28 @@ static int list_versions(struct file *filp, struct dm_ioctl *param, size_t param /* * Now loop through filling out the names & versions. */ - dm_target_iterate(list_version_get_info, &iter_info); + if (!tt) + dm_target_iterate(list_version_get_info, &iter_info); + else + list_version_get_info(tt, &iter_info); param->flags |= iter_info.flags; out: + if (tt) + dm_put_target_type(tt); return 0; } +static int list_versions(struct file *filp, struct dm_ioctl *param, size_t param_size) +{ + return __list_versions(param, param_size, NULL); +} + +static int get_target_version(struct file *filp, struct dm_ioctl *param, size_t param_size) +{ + return __list_versions(param, param_size, param->name); +} + static int check_name(const char *name) { if (strchr(name, '/')) { @@ -1664,6 +1689,7 @@ static ioctl_fn lookup_ioctl(unsigned int cmd, int *ioctl_flags) {DM_TARGET_MSG_CMD, 0, target_message}, {DM_DEV_SET_GEOMETRY_CMD, 0, dev_set_geometry}, {DM_DEV_ARM_POLL, IOCTL_FLAGS_NO_PARAMS, dev_arm_poll}, + {DM_GET_TARGET_VERSION, 0, get_target_version}, }; if (unlikely(cmd >= ARRAY_SIZE(_ioctls))) |