Commit 3fda0e73 authored by Eric W. Biederman's avatar Eric W. Biederman

userns: Simplify insert_extent

Consolidate the code to write to the new mapping at the end of the
function to remove the duplication.  Move the increase in the number
of mappings into insert_extent, keeping the logic together.

Just a small increase in readability and maintainability.
Signed-off-by: default avatar"Eric W. Biederman" <ebiederm@xmission.com>
parent ece66133
......@@ -758,12 +758,7 @@ static bool mappings_overlap(struct uid_gid_map *new_map,
*/
static int insert_extent(struct uid_gid_map *map, struct uid_gid_extent *extent)
{
if (map->nr_extents < UID_GID_MAP_MAX_BASE_EXTENTS) {
map->extent[map->nr_extents].first = extent->first;
map->extent[map->nr_extents].lower_first = extent->lower_first;
map->extent[map->nr_extents].count = extent->count;
return 0;
}
struct uid_gid_extent *dest;
if (map->nr_extents == UID_GID_MAP_MAX_BASE_EXTENTS) {
struct uid_gid_extent *forward;
......@@ -784,9 +779,13 @@ static int insert_extent(struct uid_gid_map *map, struct uid_gid_extent *extent)
map->reverse = NULL;
}
map->forward[map->nr_extents].first = extent->first;
map->forward[map->nr_extents].lower_first = extent->lower_first;
map->forward[map->nr_extents].count = extent->count;
if (map->nr_extents < UID_GID_MAP_MAX_BASE_EXTENTS)
dest = &map->extent[map->nr_extents];
else
dest = &map->forward[map->nr_extents];
*dest = *extent;
map->nr_extents++;
return 0;
}
......@@ -968,8 +967,6 @@ static ssize_t map_write(struct file *file, const char __user *buf,
if (ret < 0)
goto out;
ret = -EINVAL;
new_map.nr_extents++;
}
/* Be very certaint the new map actually exists */
if (new_map.nr_extents == 0)
......
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