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NFS/NFSD/SUNRPC: replace generic creds with 'struct cred'.

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SUNRPC has two sorts of credentials, both of which appear as
"struct rpc_cred".
There are "generic credentials" which are supplied by clients
such as NFS and passed in 'struct rpc_message' to indicate
which user should be used to authorize the request, and there
are low-level credentials such as AUTH_NULL, AUTH_UNIX, AUTH_GSS
which describe the credential to be sent over the wires.

This patch replaces all the generic credentials by 'struct cred'
pointers - the credential structure used throughout Linux.

For machine credentials, there is a special 'struct cred *' pointer
which is statically allocated and recognized where needed as
having a special meaning.  A look-up of a low-level cred will
map this to a machine credential.

Signed-off-by: NeilBrown <neilb@suse.com>
Acked-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
NeilBrown
2018-12-03 11:30:31 +11:00
committed by Anna Schumaker
parent 684f39b4cf
commit a52458b48a
33 changed files with 261 additions and 343 deletions
Download Patch File Download Diff File Expand all files Collapse all files

92
fs/nfs/nfs4state.c
View File

@@ -87,7 +87,7 @@ const nfs4_stateid current_stateid = {
static DEFINE_MUTEX(nfs_clid_init_mutex);
int nfs4_init_clientid(struct nfs_client *clp, struct rpc_cred *cred)
int nfs4_init_clientid(struct nfs_client *clp, const struct cred *cred)
{
struct nfs4_setclientid_res clid = {
.clientid = clp->cl_clientid,
@@ -134,7 +134,7 @@ out:
*/
int nfs40_discover_server_trunking(struct nfs_client *clp,
struct nfs_client **result,
struct rpc_cred *cred)
const struct cred *cred)
{
struct nfs4_setclientid_res clid = {
.clientid = clp->cl_clientid,
@@ -164,9 +164,9 @@ out:
return status;
}
struct rpc_cred *nfs4_get_machine_cred(struct nfs_client *clp)
const struct cred *nfs4_get_machine_cred(struct nfs_client *clp)
{
return get_rpccred(rpc_machine_cred());
return get_cred(rpc_machine_cred());
}
static void nfs4_root_machine_cred(struct nfs_client *clp)
@@ -177,10 +177,10 @@ static void nfs4_root_machine_cred(struct nfs_client *clp)
clp->cl_rpcclient->cl_principal = NULL;
}
static struct rpc_cred *
static const struct cred *
nfs4_get_renew_cred_server_locked(struct nfs_server *server)
{
struct rpc_cred *cred = NULL;
const struct cred *cred = NULL;
struct nfs4_state_owner *sp;
struct rb_node *pos;
@@ -190,7 +190,7 @@ nfs4_get_renew_cred_server_locked(struct nfs_server *server)
sp = rb_entry(pos, struct nfs4_state_owner, so_server_node);
if (list_empty(&sp->so_states))
continue;
cred = get_rpccred(sp->so_cred);
cred = get_cred(sp->so_cred);
break;
}
return cred;
@@ -203,9 +203,9 @@ nfs4_get_renew_cred_server_locked(struct nfs_server *server)
* Returns an rpc_cred with reference count bumped, or NULL.
* Caller must hold clp->cl_lock.
*/
struct rpc_cred *nfs4_get_renew_cred(struct nfs_client *clp)
const struct cred *nfs4_get_renew_cred(struct nfs_client *clp)
{
struct rpc_cred *cred = NULL;
const struct cred *cred = NULL;
struct nfs_server *server;
/* Use machine credentials if available */
@@ -312,7 +312,7 @@ static void nfs41_finish_session_reset(struct nfs_client *clp)
nfs41_setup_state_renewal(clp);
}
int nfs41_init_clientid(struct nfs_client *clp, struct rpc_cred *cred)
int nfs41_init_clientid(struct nfs_client *clp, const struct cred *cred)
{
int status;
@@ -347,7 +347,7 @@ out:
*/
int nfs41_discover_server_trunking(struct nfs_client *clp,
struct nfs_client **result,
struct rpc_cred *cred)
const struct cred *cred)
{
int status;
@@ -385,30 +385,32 @@ int nfs41_discover_server_trunking(struct nfs_client *clp,
* nfs4_get_clid_cred - Acquire credential for a setclientid operation
* @clp: client state handle
*
* Returns an rpc_cred with reference count bumped, or NULL.
* Returns a cred with reference count bumped, or NULL.
*/
struct rpc_cred *nfs4_get_clid_cred(struct nfs_client *clp)
const struct cred *nfs4_get_clid_cred(struct nfs_client *clp)
{
struct rpc_cred *cred;
const struct cred *cred;
cred = nfs4_get_machine_cred(clp);
return cred;
}
static struct nfs4_state_owner *
nfs4_find_state_owner_locked(struct nfs_server *server, struct rpc_cred *cred)
nfs4_find_state_owner_locked(struct nfs_server *server, const struct cred *cred)
{
struct rb_node **p = &server->state_owners.rb_node,
*parent = NULL;
struct nfs4_state_owner *sp;
int cmp;
while (*p != NULL) {
parent = *p;
sp = rb_entry(parent, struct nfs4_state_owner, so_server_node);
cmp = cred_fscmp(cred, sp->so_cred);
if (cred < sp->so_cred)
if (cmp < 0)
p = &parent->rb_left;
else if (cred > sp->so_cred)
else if (cmp > 0)
p = &parent->rb_right;
else {
if (!list_empty(&sp->so_lru))
@@ -427,14 +429,16 @@ nfs4_insert_state_owner_locked(struct nfs4_state_owner *new)
struct rb_node **p = &server->state_owners.rb_node,
*parent = NULL;
struct nfs4_state_owner *sp;
int cmp;
while (*p != NULL) {
parent = *p;
sp = rb_entry(parent, struct nfs4_state_owner, so_server_node);
cmp = cred_fscmp(new->so_cred, sp->so_cred);
if (new->so_cred < sp->so_cred)
if (cmp < 0)
p = &parent->rb_left;
else if (new->so_cred > sp->so_cred)
else if (cmp > 0)
p = &parent->rb_right;
else {
if (!list_empty(&sp->so_lru))
@@ -481,7 +485,7 @@ nfs4_destroy_seqid_counter(struct nfs_seqid_counter *sc)
*/
static struct nfs4_state_owner *
nfs4_alloc_state_owner(struct nfs_server *server,
struct rpc_cred *cred,
const struct cred *cred,
gfp_t gfp_flags)
{
struct nfs4_state_owner *sp;
@@ -496,7 +500,7 @@ nfs4_alloc_state_owner(struct nfs_server *server,
return NULL;
}
sp->so_server = server;
sp->so_cred = get_rpccred(cred);
sp->so_cred = get_cred(cred);
spin_lock_init(&sp->so_lock);
INIT_LIST_HEAD(&sp->so_states);
nfs4_init_seqid_counter(&sp->so_seqid);
@@ -525,7 +529,7 @@ nfs4_reset_state_owner(struct nfs4_state_owner *sp)
static void nfs4_free_state_owner(struct nfs4_state_owner *sp)
{
nfs4_destroy_seqid_counter(&sp->so_seqid);
put_rpccred(sp->so_cred);
put_cred(sp->so_cred);
ida_simple_remove(&sp->so_server->openowner_id, sp->so_seqid.owner_id);
kfree(sp);
}
@@ -563,7 +567,7 @@ static void nfs4_gc_state_owners(struct nfs_server *server)
* Returns a pointer to an instantiated nfs4_state_owner struct, or NULL.
*/
struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *server,
struct rpc_cred *cred,
const struct cred *cred,
gfp_t gfp_flags)
{
struct nfs_client *clp = server->nfs_client;
@@ -1032,7 +1036,7 @@ bool nfs4_copy_open_stateid(nfs4_stateid *dst, struct nfs4_state *state)
*/
int nfs4_select_rw_stateid(struct nfs4_state *state,
fmode_t fmode, const struct nfs_lock_context *l_ctx,
nfs4_stateid *dst, struct rpc_cred **cred)
nfs4_stateid *dst, const struct cred **cred)
{
int ret;
@@ -1732,7 +1736,7 @@ static void nfs4_state_start_reclaim_reboot(struct nfs_client *clp)
static int nfs4_reclaim_complete(struct nfs_client *clp,
const struct nfs4_state_recovery_ops *ops,
struct rpc_cred *cred)
const struct cred *cred)
{
/* Notify the server we're done reclaiming our state */
if (ops->reclaim_complete)
@@ -1783,7 +1787,7 @@ static int nfs4_state_clear_reclaim_reboot(struct nfs_client *clp)
static void nfs4_state_end_reclaim_reboot(struct nfs_client *clp)
{
const struct nfs4_state_recovery_ops *ops;
struct rpc_cred *cred;
const struct cred *cred;
int err;
if (!nfs4_state_clear_reclaim_reboot(clp))
@@ -1791,7 +1795,7 @@ static void nfs4_state_end_reclaim_reboot(struct nfs_client *clp)
ops = clp->cl_mvops->reboot_recovery_ops;
cred = nfs4_get_clid_cred(clp);
err = nfs4_reclaim_complete(clp, ops, cred);
put_rpccred(cred);
put_cred(cred);
if (err == -NFS4ERR_CONN_NOT_BOUND_TO_SESSION)
set_bit(NFS4CLNT_RECLAIM_REBOOT, &clp->cl_state);
}
@@ -1887,7 +1891,7 @@ restart:
static int nfs4_check_lease(struct nfs_client *clp)
{
struct rpc_cred *cred;
const struct cred *cred;
const struct nfs4_state_maintenance_ops *ops =
clp->cl_mvops->state_renewal_ops;
int status;
@@ -1903,7 +1907,7 @@ static int nfs4_check_lease(struct nfs_client *clp)
goto out;
}
status = ops->renew_lease(clp, cred);
put_rpccred(cred);
put_cred(cred);
if (status == -ETIMEDOUT) {
set_bit(NFS4CLNT_CHECK_LEASE, &clp->cl_state);
return 0;
@@ -1963,7 +1967,7 @@ static int nfs4_handle_reclaim_lease_error(struct nfs_client *clp, int status)
static int nfs4_establish_lease(struct nfs_client *clp)
{
struct rpc_cred *cred;
const struct cred *cred;
const struct nfs4_state_recovery_ops *ops =
clp->cl_mvops->reboot_recovery_ops;
int status;
@@ -1975,7 +1979,7 @@ static int nfs4_establish_lease(struct nfs_client *clp)
if (cred == NULL)
return -ENOENT;
status = ops->establish_clid(clp, cred);
put_rpccred(cred);
put_cred(cred);
if (status != 0)
return status;
pnfs_destroy_all_layouts(clp);
@@ -2022,7 +2026,7 @@ static int nfs4_purge_lease(struct nfs_client *clp)
*
* Returns zero or a negative NFS4ERR status code.
*/
static int nfs4_try_migration(struct nfs_server *server, struct rpc_cred *cred)
static int nfs4_try_migration(struct nfs_server *server, const struct cred *cred)
{
struct nfs_client *clp = server->nfs_client;
struct nfs4_fs_locations *locations = NULL;
@@ -2092,7 +2096,7 @@ static int nfs4_handle_migration(struct nfs_client *clp)
const struct nfs4_state_maintenance_ops *ops =
clp->cl_mvops->state_renewal_ops;
struct nfs_server *server;
struct rpc_cred *cred;
const struct cred *cred;
dprintk("%s: migration reported on \"%s\"\n", __func__,
clp->cl_hostname);
@@ -2118,13 +2122,13 @@ restart:
rcu_read_unlock();
status = nfs4_try_migration(server, cred);
if (status < 0) {
put_rpccred(cred);
put_cred(cred);
return status;
}
goto restart;
}
rcu_read_unlock();
put_rpccred(cred);
put_cred(cred);
return 0;
}
@@ -2138,7 +2142,7 @@ static int nfs4_handle_lease_moved(struct nfs_client *clp)
const struct nfs4_state_maintenance_ops *ops =
clp->cl_mvops->state_renewal_ops;
struct nfs_server *server;
struct rpc_cred *cred;
const struct cred *cred;
dprintk("%s: lease moved reported on \"%s\"\n", __func__,
clp->cl_hostname);
@@ -2171,7 +2175,7 @@ restart:
rcu_read_unlock();
out:
put_rpccred(cred);
put_cred(cred);
return 0;
}
@@ -2194,7 +2198,7 @@ int nfs4_discover_server_trunking(struct nfs_client *clp,
const struct nfs4_state_recovery_ops *ops =
clp->cl_mvops->reboot_recovery_ops;
struct rpc_clnt *clnt;
struct rpc_cred *cred;
const struct cred *cred;
int i, status;
dprintk("NFS: %s: testing '%s'\n", __func__, clp->cl_hostname);
@@ -2210,7 +2214,7 @@ again:
goto out_unlock;
status = ops->detect_trunking(clp, result, cred);
put_rpccred(cred);
put_cred(cred);
switch (status) {
case 0:
case -EINTR:
@@ -2401,7 +2405,7 @@ out_recovery:
static int nfs4_reset_session(struct nfs_client *clp)
{
struct rpc_cred *cred;
const struct cred *cred;
int status;
if (!nfs4_has_session(clp))
@@ -2439,14 +2443,13 @@ static int nfs4_reset_session(struct nfs_client *clp)
dprintk("%s: session reset was successful for server %s!\n",
__func__, clp->cl_hostname);
out:
if (cred)
put_rpccred(cred);
put_cred(cred);
return status;
}
static int nfs4_bind_conn_to_session(struct nfs_client *clp)
{
struct rpc_cred *cred;
const struct cred *cred;
int ret;
if (!nfs4_has_session(clp))
@@ -2456,8 +2459,7 @@ static int nfs4_bind_conn_to_session(struct nfs_client *clp)
return ret;
cred = nfs4_get_clid_cred(clp);
ret = nfs4_proc_bind_conn_to_session(clp, cred);
if (cred)
put_rpccred(cred);
put_cred(cred);
clear_bit(NFS4CLNT_BIND_CONN_TO_SESSION, &clp->cl_state);
switch (ret) {
case 0: