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keys: Simplify key description management

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Simplify key description management by cramming the word containing the
length with the first few chars of the description also.  This simplifies
the code that generates the index-key used by assoc_array.  It should speed
up key searching a bit too.

Signed-off-by: David Howells <dhowells@redhat.com>
This commit is contained in:
David Howells 2019-06-26 21:02:31 +01:00
parent 3b8c4a08a4
commit f771fde820
5 changed files with 43 additions and 50 deletions
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14
include/linux/key.h
View file

@ -86,9 +86,20 @@ struct keyring_list;
struct keyring_name;
struct keyring_index_key {
union {
struct {
#ifdef __LITTLE_ENDIAN /* Put desc_len at the LSB of x */
u8 desc_len;
char desc[sizeof(long) - 1]; /* First few chars of description */
#else
char desc[sizeof(long) - 1]; /* First few chars of description */
u8 desc_len;
#endif
};
unsigned long x;
};
struct key_type *type;
const char *description;
size_t desc_len;
};
union key_payload {
@ -202,6 +213,7 @@ struct key {
union {
struct keyring_index_key index_key;
struct {
unsigned long len_desc;
struct key_type *type; /* type of key */
char *description;
};