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SUNRPC: add 'struct cred *' to auth_cred and rpc_cred

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The SUNRPC credential framework was put together before
Linux has 'struct cred'.  Now that we have it, it makes sense to
use it.
This first step just includes a suitable 'struct cred *' pointer
in every 'struct auth_cred' and almost every 'struct rpc_cred'.

The rpc_cred used for auth_null has a NULL 'struct cred *' as nothing
else really makes sense.

For rpc_cred, the pointer is reference counted.
For auth_cred it isn't.  struct auth_cred are either allocated on
the stack, in which case the thread owns a reference to the auth,
or are part of 'struct generic_cred' in which case gc_base owns the
reference, and "acred" shares it.

Signed-off-by: NeilBrown <neilb@suse.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
NeilBrown
2018-12-03 11:30:30 +11:00
committed by Anna Schumaker
parent f06bc03339
commit 97f68c6b02
7 changed files with 48 additions and 3 deletions
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2
include/linux/sunrpc/auth.h
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@@ -46,6 +46,7 @@ enum {
/* Work around the lack of a VFS credential */
struct auth_cred {
const struct cred *cred;
kuid_t uid;
kgid_t gid;
struct group_info *group_info;
@@ -68,6 +69,7 @@ struct rpc_cred {
unsigned long cr_expire; /* when to gc */
unsigned long cr_flags; /* various flags */
refcount_t cr_count; /* ref count */
const struct cred *cr_cred;
kuid_t cr_uid;