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Move get_first_data_offset to luks2_segment.c

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This commit is contained in:
Ondrej Kozina
2019-02-25 17:39:33 +01:00
committed by Milan Broz
parent 36ac5fe735
commit 203fe0f4bf
4 changed files with 44 additions and 36 deletions
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35
lib/luks2/luks2_segment.c
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@@ -21,6 +21,34 @@
#include "luks2_internal.h"
/* use only on already validated 'segments' object */
static uint64_t get_first_data_offset(json_object *jobj_segs, const char *type)
{
json_object *jobj_offset, *jobj_type;
uint64_t tmp, min = UINT64_MAX;
json_object_object_foreach(jobj_segs, key, val) {
UNUSED(key);
if (type) {
json_object_object_get_ex(val, "type", &jobj_type);
if (strcmp(type, json_object_get_string(jobj_type)))
continue;
}
json_object_object_get_ex(val, "offset", &jobj_offset);
tmp = json_object_get_uint64(jobj_offset);
if (!tmp)
return tmp;
if (tmp < min)
min = tmp;
}
return min;
}
json_object *json_get_segments_jobj(json_object *hdr_jobj)
{
json_object *jobj_segments;
@@ -31,6 +59,13 @@ json_object *json_get_segments_jobj(json_object *hdr_jobj)
return jobj_segments;
}
uint64_t json_segments_get_minimal_offset(json_object *jobj_segments, unsigned blockwise)
{
if (!jobj_segments)
return 0;
return blockwise ? get_first_data_offset(jobj_segments, NULL) >> SECTOR_SHIFT : get_first_data_offset(jobj_segments, NULL);
}
uint64_t json_segment_get_offset(json_object *jobj_segment, unsigned blockwise)
{
json_object *jobj;