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Diffstat (limited to 'drivers/md/dm-ioctl.c')
-rw-r--r--drivers/md/dm-ioctl.c32
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)))