mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-30 16:07:39 +00:00
b67bfe0d42
I'm not sure why, but the hlist for each entry iterators were conceived list_for_each_entry(pos, head, member) The hlist ones were greedy and wanted an extra parameter: hlist_for_each_entry(tpos, pos, head, member) Why did they need an extra pos parameter? I'm not quite sure. Not only they don't really need it, it also prevents the iterator from looking exactly like the list iterator, which is unfortunate. Besides the semantic patch, there was some manual work required: - Fix up the actual hlist iterators in linux/list.h - Fix up the declaration of other iterators based on the hlist ones. - A very small amount of places were using the 'node' parameter, this was modified to use 'obj->member' instead. - Coccinelle didn't handle the hlist_for_each_entry_safe iterator properly, so those had to be fixed up manually. The semantic patch which is mostly the work of Peter Senna Tschudin is here: @@ iterator name hlist_for_each_entry, hlist_for_each_entry_continue, hlist_for_each_entry_from, hlist_for_each_entry_rcu, hlist_for_each_entry_rcu_bh, hlist_for_each_entry_continue_rcu_bh, for_each_busy_worker, ax25_uid_for_each, ax25_for_each, inet_bind_bucket_for_each, sctp_for_each_hentry, sk_for_each, sk_for_each_rcu, sk_for_each_from, sk_for_each_safe, sk_for_each_bound, hlist_for_each_entry_safe, hlist_for_each_entry_continue_rcu, nr_neigh_for_each, nr_neigh_for_each_safe, nr_node_for_each, nr_node_for_each_safe, for_each_gfn_indirect_valid_sp, for_each_gfn_sp, for_each_host; type T; expression a,c,d,e; identifier b; statement S; @@ -T b; <+... when != b ( hlist_for_each_entry(a, - b, c, d) S | hlist_for_each_entry_continue(a, - b, c) S | hlist_for_each_entry_from(a, - b, c) S | hlist_for_each_entry_rcu(a, - b, c, d) S | hlist_for_each_entry_rcu_bh(a, - b, c, d) S | hlist_for_each_entry_continue_rcu_bh(a, - b, c) S | for_each_busy_worker(a, c, - b, d) S | ax25_uid_for_each(a, - b, c) S | ax25_for_each(a, - b, c) S | inet_bind_bucket_for_each(a, - b, c) S | sctp_for_each_hentry(a, - b, c) S | sk_for_each(a, - b, c) S | sk_for_each_rcu(a, - b, c) S | sk_for_each_from -(a, b) +(a) S + sk_for_each_from(a) S | sk_for_each_safe(a, - b, c, d) S | sk_for_each_bound(a, - b, c) S | hlist_for_each_entry_safe(a, - b, c, d, e) S | hlist_for_each_entry_continue_rcu(a, - b, c) S | nr_neigh_for_each(a, - b, c) S | nr_neigh_for_each_safe(a, - b, c, d) S | nr_node_for_each(a, - b, c) S | nr_node_for_each_safe(a, - b, c, d) S | - for_each_gfn_sp(a, c, d, b) S + for_each_gfn_sp(a, c, d) S | - for_each_gfn_indirect_valid_sp(a, c, d, b) S + for_each_gfn_indirect_valid_sp(a, c, d) S | for_each_host(a, - b, c) S | for_each_host_safe(a, - b, c, d) S | for_each_mesh_entry(a, - b, c, d) S ) ...+> [akpm@linux-foundation.org: drop bogus change from net/ipv4/raw.c] [akpm@linux-foundation.org: drop bogus hunk from net/ipv6/raw.c] [akpm@linux-foundation.org: checkpatch fixes] [akpm@linux-foundation.org: fix warnings] [akpm@linux-foudnation.org: redo intrusive kvm changes] Tested-by: Peter Senna Tschudin <peter.senna@gmail.com> Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Signed-off-by: Sasha Levin <sasha.levin@oracle.com> Cc: Wu Fengguang <fengguang.wu@intel.com> Cc: Marcelo Tosatti <mtosatti@redhat.com> Cc: Gleb Natapov <gleb@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
741 lines
17 KiB
C
741 lines
17 KiB
C
/*
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* linux/net/sunrpc/auth.c
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*
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* Generic RPC client authentication API.
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*
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* Copyright (C) 1996, Olaf Kirch <okir@monad.swb.de>
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*/
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#include <linux/types.h>
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#include <linux/sched.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/errno.h>
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#include <linux/hash.h>
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#include <linux/sunrpc/clnt.h>
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#include <linux/sunrpc/gss_api.h>
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#include <linux/spinlock.h>
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#ifdef RPC_DEBUG
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# define RPCDBG_FACILITY RPCDBG_AUTH
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#endif
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#define RPC_CREDCACHE_DEFAULT_HASHBITS (4)
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struct rpc_cred_cache {
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struct hlist_head *hashtable;
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unsigned int hashbits;
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spinlock_t lock;
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};
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static unsigned int auth_hashbits = RPC_CREDCACHE_DEFAULT_HASHBITS;
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static DEFINE_SPINLOCK(rpc_authflavor_lock);
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static const struct rpc_authops *auth_flavors[RPC_AUTH_MAXFLAVOR] = {
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&authnull_ops, /* AUTH_NULL */
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&authunix_ops, /* AUTH_UNIX */
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NULL, /* others can be loadable modules */
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};
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static LIST_HEAD(cred_unused);
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static unsigned long number_cred_unused;
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#define MAX_HASHTABLE_BITS (14)
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static int param_set_hashtbl_sz(const char *val, const struct kernel_param *kp)
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{
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unsigned long num;
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unsigned int nbits;
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int ret;
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if (!val)
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goto out_inval;
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ret = strict_strtoul(val, 0, &num);
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if (ret == -EINVAL)
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goto out_inval;
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nbits = fls(num);
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if (num > (1U << nbits))
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nbits++;
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if (nbits > MAX_HASHTABLE_BITS || nbits < 2)
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goto out_inval;
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*(unsigned int *)kp->arg = nbits;
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return 0;
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out_inval:
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return -EINVAL;
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}
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static int param_get_hashtbl_sz(char *buffer, const struct kernel_param *kp)
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{
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unsigned int nbits;
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nbits = *(unsigned int *)kp->arg;
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return sprintf(buffer, "%u", 1U << nbits);
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}
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#define param_check_hashtbl_sz(name, p) __param_check(name, p, unsigned int);
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static struct kernel_param_ops param_ops_hashtbl_sz = {
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.set = param_set_hashtbl_sz,
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.get = param_get_hashtbl_sz,
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};
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module_param_named(auth_hashtable_size, auth_hashbits, hashtbl_sz, 0644);
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MODULE_PARM_DESC(auth_hashtable_size, "RPC credential cache hashtable size");
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static u32
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pseudoflavor_to_flavor(u32 flavor) {
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if (flavor >= RPC_AUTH_MAXFLAVOR)
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return RPC_AUTH_GSS;
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return flavor;
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}
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int
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rpcauth_register(const struct rpc_authops *ops)
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{
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rpc_authflavor_t flavor;
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int ret = -EPERM;
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if ((flavor = ops->au_flavor) >= RPC_AUTH_MAXFLAVOR)
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return -EINVAL;
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spin_lock(&rpc_authflavor_lock);
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if (auth_flavors[flavor] == NULL) {
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auth_flavors[flavor] = ops;
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ret = 0;
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}
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spin_unlock(&rpc_authflavor_lock);
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return ret;
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}
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EXPORT_SYMBOL_GPL(rpcauth_register);
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int
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rpcauth_unregister(const struct rpc_authops *ops)
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{
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rpc_authflavor_t flavor;
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int ret = -EPERM;
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if ((flavor = ops->au_flavor) >= RPC_AUTH_MAXFLAVOR)
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return -EINVAL;
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spin_lock(&rpc_authflavor_lock);
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if (auth_flavors[flavor] == ops) {
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auth_flavors[flavor] = NULL;
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ret = 0;
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}
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spin_unlock(&rpc_authflavor_lock);
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return ret;
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}
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EXPORT_SYMBOL_GPL(rpcauth_unregister);
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/**
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* rpcauth_list_flavors - discover registered flavors and pseudoflavors
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* @array: array to fill in
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* @size: size of "array"
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*
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* Returns the number of array items filled in, or a negative errno.
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*
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* The returned array is not sorted by any policy. Callers should not
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* rely on the order of the items in the returned array.
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*/
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int
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rpcauth_list_flavors(rpc_authflavor_t *array, int size)
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{
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rpc_authflavor_t flavor;
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int result = 0;
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spin_lock(&rpc_authflavor_lock);
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for (flavor = 0; flavor < RPC_AUTH_MAXFLAVOR; flavor++) {
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const struct rpc_authops *ops = auth_flavors[flavor];
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rpc_authflavor_t pseudos[4];
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int i, len;
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if (result >= size) {
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result = -ENOMEM;
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break;
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}
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if (ops == NULL)
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continue;
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if (ops->list_pseudoflavors == NULL) {
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array[result++] = ops->au_flavor;
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continue;
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}
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len = ops->list_pseudoflavors(pseudos, ARRAY_SIZE(pseudos));
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if (len < 0) {
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result = len;
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break;
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}
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for (i = 0; i < len; i++) {
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if (result >= size) {
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result = -ENOMEM;
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break;
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}
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array[result++] = pseudos[i];
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}
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}
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spin_unlock(&rpc_authflavor_lock);
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dprintk("RPC: %s returns %d\n", __func__, result);
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return result;
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}
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EXPORT_SYMBOL_GPL(rpcauth_list_flavors);
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struct rpc_auth *
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rpcauth_create(rpc_authflavor_t pseudoflavor, struct rpc_clnt *clnt)
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{
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struct rpc_auth *auth;
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const struct rpc_authops *ops;
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u32 flavor = pseudoflavor_to_flavor(pseudoflavor);
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auth = ERR_PTR(-EINVAL);
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if (flavor >= RPC_AUTH_MAXFLAVOR)
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goto out;
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if ((ops = auth_flavors[flavor]) == NULL)
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request_module("rpc-auth-%u", flavor);
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spin_lock(&rpc_authflavor_lock);
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ops = auth_flavors[flavor];
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if (ops == NULL || !try_module_get(ops->owner)) {
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spin_unlock(&rpc_authflavor_lock);
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goto out;
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}
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spin_unlock(&rpc_authflavor_lock);
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auth = ops->create(clnt, pseudoflavor);
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module_put(ops->owner);
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if (IS_ERR(auth))
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return auth;
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if (clnt->cl_auth)
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rpcauth_release(clnt->cl_auth);
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clnt->cl_auth = auth;
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out:
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return auth;
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}
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EXPORT_SYMBOL_GPL(rpcauth_create);
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void
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rpcauth_release(struct rpc_auth *auth)
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{
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if (!atomic_dec_and_test(&auth->au_count))
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return;
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auth->au_ops->destroy(auth);
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}
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static DEFINE_SPINLOCK(rpc_credcache_lock);
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static void
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rpcauth_unhash_cred_locked(struct rpc_cred *cred)
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{
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hlist_del_rcu(&cred->cr_hash);
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smp_mb__before_clear_bit();
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clear_bit(RPCAUTH_CRED_HASHED, &cred->cr_flags);
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}
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static int
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rpcauth_unhash_cred(struct rpc_cred *cred)
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{
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spinlock_t *cache_lock;
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int ret;
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cache_lock = &cred->cr_auth->au_credcache->lock;
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spin_lock(cache_lock);
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ret = atomic_read(&cred->cr_count) == 0;
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if (ret)
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rpcauth_unhash_cred_locked(cred);
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spin_unlock(cache_lock);
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return ret;
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}
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/*
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* Initialize RPC credential cache
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*/
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int
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rpcauth_init_credcache(struct rpc_auth *auth)
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{
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struct rpc_cred_cache *new;
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unsigned int hashsize;
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new = kmalloc(sizeof(*new), GFP_KERNEL);
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if (!new)
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goto out_nocache;
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new->hashbits = auth_hashbits;
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hashsize = 1U << new->hashbits;
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new->hashtable = kcalloc(hashsize, sizeof(new->hashtable[0]), GFP_KERNEL);
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if (!new->hashtable)
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goto out_nohashtbl;
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spin_lock_init(&new->lock);
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auth->au_credcache = new;
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return 0;
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out_nohashtbl:
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kfree(new);
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out_nocache:
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return -ENOMEM;
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}
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EXPORT_SYMBOL_GPL(rpcauth_init_credcache);
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/*
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* Destroy a list of credentials
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*/
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static inline
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void rpcauth_destroy_credlist(struct list_head *head)
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{
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struct rpc_cred *cred;
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while (!list_empty(head)) {
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cred = list_entry(head->next, struct rpc_cred, cr_lru);
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list_del_init(&cred->cr_lru);
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put_rpccred(cred);
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}
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}
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/*
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* Clear the RPC credential cache, and delete those credentials
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* that are not referenced.
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*/
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void
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rpcauth_clear_credcache(struct rpc_cred_cache *cache)
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{
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LIST_HEAD(free);
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struct hlist_head *head;
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struct rpc_cred *cred;
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unsigned int hashsize = 1U << cache->hashbits;
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int i;
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spin_lock(&rpc_credcache_lock);
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spin_lock(&cache->lock);
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for (i = 0; i < hashsize; i++) {
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head = &cache->hashtable[i];
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while (!hlist_empty(head)) {
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cred = hlist_entry(head->first, struct rpc_cred, cr_hash);
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get_rpccred(cred);
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if (!list_empty(&cred->cr_lru)) {
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list_del(&cred->cr_lru);
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number_cred_unused--;
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}
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list_add_tail(&cred->cr_lru, &free);
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rpcauth_unhash_cred_locked(cred);
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}
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}
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spin_unlock(&cache->lock);
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spin_unlock(&rpc_credcache_lock);
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rpcauth_destroy_credlist(&free);
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}
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/*
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* Destroy the RPC credential cache
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*/
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void
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rpcauth_destroy_credcache(struct rpc_auth *auth)
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{
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struct rpc_cred_cache *cache = auth->au_credcache;
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if (cache) {
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auth->au_credcache = NULL;
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rpcauth_clear_credcache(cache);
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kfree(cache->hashtable);
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kfree(cache);
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}
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}
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EXPORT_SYMBOL_GPL(rpcauth_destroy_credcache);
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#define RPC_AUTH_EXPIRY_MORATORIUM (60 * HZ)
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/*
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* Remove stale credentials. Avoid sleeping inside the loop.
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*/
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static int
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rpcauth_prune_expired(struct list_head *free, int nr_to_scan)
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{
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spinlock_t *cache_lock;
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struct rpc_cred *cred, *next;
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unsigned long expired = jiffies - RPC_AUTH_EXPIRY_MORATORIUM;
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list_for_each_entry_safe(cred, next, &cred_unused, cr_lru) {
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if (nr_to_scan-- == 0)
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break;
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/*
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* Enforce a 60 second garbage collection moratorium
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* Note that the cred_unused list must be time-ordered.
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*/
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if (time_in_range(cred->cr_expire, expired, jiffies) &&
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test_bit(RPCAUTH_CRED_HASHED, &cred->cr_flags) != 0)
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return 0;
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|
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list_del_init(&cred->cr_lru);
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number_cred_unused--;
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if (atomic_read(&cred->cr_count) != 0)
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continue;
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cache_lock = &cred->cr_auth->au_credcache->lock;
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spin_lock(cache_lock);
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if (atomic_read(&cred->cr_count) == 0) {
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get_rpccred(cred);
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list_add_tail(&cred->cr_lru, free);
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rpcauth_unhash_cred_locked(cred);
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}
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spin_unlock(cache_lock);
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}
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return (number_cred_unused / 100) * sysctl_vfs_cache_pressure;
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}
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|
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/*
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* Run memory cache shrinker.
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*/
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static int
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rpcauth_cache_shrinker(struct shrinker *shrink, struct shrink_control *sc)
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{
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LIST_HEAD(free);
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int res;
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int nr_to_scan = sc->nr_to_scan;
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gfp_t gfp_mask = sc->gfp_mask;
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if ((gfp_mask & GFP_KERNEL) != GFP_KERNEL)
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return (nr_to_scan == 0) ? 0 : -1;
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if (list_empty(&cred_unused))
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return 0;
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spin_lock(&rpc_credcache_lock);
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res = rpcauth_prune_expired(&free, nr_to_scan);
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spin_unlock(&rpc_credcache_lock);
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rpcauth_destroy_credlist(&free);
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return res;
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}
|
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|
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/*
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* Look up a process' credentials in the authentication cache
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*/
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struct rpc_cred *
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rpcauth_lookup_credcache(struct rpc_auth *auth, struct auth_cred * acred,
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int flags)
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{
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LIST_HEAD(free);
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struct rpc_cred_cache *cache = auth->au_credcache;
|
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struct rpc_cred *cred = NULL,
|
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*entry, *new;
|
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unsigned int nr;
|
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|
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nr = hash_long(from_kuid(&init_user_ns, acred->uid), cache->hashbits);
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|
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rcu_read_lock();
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hlist_for_each_entry_rcu(entry, &cache->hashtable[nr], cr_hash) {
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if (!entry->cr_ops->crmatch(acred, entry, flags))
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continue;
|
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spin_lock(&cache->lock);
|
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if (test_bit(RPCAUTH_CRED_HASHED, &entry->cr_flags) == 0) {
|
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spin_unlock(&cache->lock);
|
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continue;
|
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}
|
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cred = get_rpccred(entry);
|
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spin_unlock(&cache->lock);
|
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break;
|
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}
|
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rcu_read_unlock();
|
|
|
|
if (cred != NULL)
|
|
goto found;
|
|
|
|
new = auth->au_ops->crcreate(auth, acred, flags);
|
|
if (IS_ERR(new)) {
|
|
cred = new;
|
|
goto out;
|
|
}
|
|
|
|
spin_lock(&cache->lock);
|
|
hlist_for_each_entry(entry, &cache->hashtable[nr], cr_hash) {
|
|
if (!entry->cr_ops->crmatch(acred, entry, flags))
|
|
continue;
|
|
cred = get_rpccred(entry);
|
|
break;
|
|
}
|
|
if (cred == NULL) {
|
|
cred = new;
|
|
set_bit(RPCAUTH_CRED_HASHED, &cred->cr_flags);
|
|
hlist_add_head_rcu(&cred->cr_hash, &cache->hashtable[nr]);
|
|
} else
|
|
list_add_tail(&new->cr_lru, &free);
|
|
spin_unlock(&cache->lock);
|
|
found:
|
|
if (test_bit(RPCAUTH_CRED_NEW, &cred->cr_flags) &&
|
|
cred->cr_ops->cr_init != NULL &&
|
|
!(flags & RPCAUTH_LOOKUP_NEW)) {
|
|
int res = cred->cr_ops->cr_init(auth, cred);
|
|
if (res < 0) {
|
|
put_rpccred(cred);
|
|
cred = ERR_PTR(res);
|
|
}
|
|
}
|
|
rpcauth_destroy_credlist(&free);
|
|
out:
|
|
return cred;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rpcauth_lookup_credcache);
|
|
|
|
struct rpc_cred *
|
|
rpcauth_lookupcred(struct rpc_auth *auth, int flags)
|
|
{
|
|
struct auth_cred acred;
|
|
struct rpc_cred *ret;
|
|
const struct cred *cred = current_cred();
|
|
|
|
dprintk("RPC: looking up %s cred\n",
|
|
auth->au_ops->au_name);
|
|
|
|
memset(&acred, 0, sizeof(acred));
|
|
acred.uid = cred->fsuid;
|
|
acred.gid = cred->fsgid;
|
|
acred.group_info = get_group_info(((struct cred *)cred)->group_info);
|
|
|
|
ret = auth->au_ops->lookup_cred(auth, &acred, flags);
|
|
put_group_info(acred.group_info);
|
|
return ret;
|
|
}
|
|
|
|
void
|
|
rpcauth_init_cred(struct rpc_cred *cred, const struct auth_cred *acred,
|
|
struct rpc_auth *auth, const struct rpc_credops *ops)
|
|
{
|
|
INIT_HLIST_NODE(&cred->cr_hash);
|
|
INIT_LIST_HEAD(&cred->cr_lru);
|
|
atomic_set(&cred->cr_count, 1);
|
|
cred->cr_auth = auth;
|
|
cred->cr_ops = ops;
|
|
cred->cr_expire = jiffies;
|
|
#ifdef RPC_DEBUG
|
|
cred->cr_magic = RPCAUTH_CRED_MAGIC;
|
|
#endif
|
|
cred->cr_uid = acred->uid;
|
|
}
|
|
EXPORT_SYMBOL_GPL(rpcauth_init_cred);
|
|
|
|
struct rpc_cred *
|
|
rpcauth_generic_bind_cred(struct rpc_task *task, struct rpc_cred *cred, int lookupflags)
|
|
{
|
|
dprintk("RPC: %5u holding %s cred %p\n", task->tk_pid,
|
|
cred->cr_auth->au_ops->au_name, cred);
|
|
return get_rpccred(cred);
|
|
}
|
|
EXPORT_SYMBOL_GPL(rpcauth_generic_bind_cred);
|
|
|
|
static struct rpc_cred *
|
|
rpcauth_bind_root_cred(struct rpc_task *task, int lookupflags)
|
|
{
|
|
struct rpc_auth *auth = task->tk_client->cl_auth;
|
|
struct auth_cred acred = {
|
|
.uid = GLOBAL_ROOT_UID,
|
|
.gid = GLOBAL_ROOT_GID,
|
|
};
|
|
|
|
dprintk("RPC: %5u looking up %s cred\n",
|
|
task->tk_pid, task->tk_client->cl_auth->au_ops->au_name);
|
|
return auth->au_ops->lookup_cred(auth, &acred, lookupflags);
|
|
}
|
|
|
|
static struct rpc_cred *
|
|
rpcauth_bind_new_cred(struct rpc_task *task, int lookupflags)
|
|
{
|
|
struct rpc_auth *auth = task->tk_client->cl_auth;
|
|
|
|
dprintk("RPC: %5u looking up %s cred\n",
|
|
task->tk_pid, auth->au_ops->au_name);
|
|
return rpcauth_lookupcred(auth, lookupflags);
|
|
}
|
|
|
|
static int
|
|
rpcauth_bindcred(struct rpc_task *task, struct rpc_cred *cred, int flags)
|
|
{
|
|
struct rpc_rqst *req = task->tk_rqstp;
|
|
struct rpc_cred *new;
|
|
int lookupflags = 0;
|
|
|
|
if (flags & RPC_TASK_ASYNC)
|
|
lookupflags |= RPCAUTH_LOOKUP_NEW;
|
|
if (cred != NULL)
|
|
new = cred->cr_ops->crbind(task, cred, lookupflags);
|
|
else if (flags & RPC_TASK_ROOTCREDS)
|
|
new = rpcauth_bind_root_cred(task, lookupflags);
|
|
else
|
|
new = rpcauth_bind_new_cred(task, lookupflags);
|
|
if (IS_ERR(new))
|
|
return PTR_ERR(new);
|
|
if (req->rq_cred != NULL)
|
|
put_rpccred(req->rq_cred);
|
|
req->rq_cred = new;
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
put_rpccred(struct rpc_cred *cred)
|
|
{
|
|
/* Fast path for unhashed credentials */
|
|
if (test_bit(RPCAUTH_CRED_HASHED, &cred->cr_flags) == 0) {
|
|
if (atomic_dec_and_test(&cred->cr_count))
|
|
cred->cr_ops->crdestroy(cred);
|
|
return;
|
|
}
|
|
|
|
if (!atomic_dec_and_lock(&cred->cr_count, &rpc_credcache_lock))
|
|
return;
|
|
if (!list_empty(&cred->cr_lru)) {
|
|
number_cred_unused--;
|
|
list_del_init(&cred->cr_lru);
|
|
}
|
|
if (test_bit(RPCAUTH_CRED_HASHED, &cred->cr_flags) != 0) {
|
|
if (test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) != 0) {
|
|
cred->cr_expire = jiffies;
|
|
list_add_tail(&cred->cr_lru, &cred_unused);
|
|
number_cred_unused++;
|
|
goto out_nodestroy;
|
|
}
|
|
if (!rpcauth_unhash_cred(cred)) {
|
|
/* We were hashed and someone looked us up... */
|
|
goto out_nodestroy;
|
|
}
|
|
}
|
|
spin_unlock(&rpc_credcache_lock);
|
|
cred->cr_ops->crdestroy(cred);
|
|
return;
|
|
out_nodestroy:
|
|
spin_unlock(&rpc_credcache_lock);
|
|
}
|
|
EXPORT_SYMBOL_GPL(put_rpccred);
|
|
|
|
__be32 *
|
|
rpcauth_marshcred(struct rpc_task *task, __be32 *p)
|
|
{
|
|
struct rpc_cred *cred = task->tk_rqstp->rq_cred;
|
|
|
|
dprintk("RPC: %5u marshaling %s cred %p\n",
|
|
task->tk_pid, cred->cr_auth->au_ops->au_name, cred);
|
|
|
|
return cred->cr_ops->crmarshal(task, p);
|
|
}
|
|
|
|
__be32 *
|
|
rpcauth_checkverf(struct rpc_task *task, __be32 *p)
|
|
{
|
|
struct rpc_cred *cred = task->tk_rqstp->rq_cred;
|
|
|
|
dprintk("RPC: %5u validating %s cred %p\n",
|
|
task->tk_pid, cred->cr_auth->au_ops->au_name, cred);
|
|
|
|
return cred->cr_ops->crvalidate(task, p);
|
|
}
|
|
|
|
static void rpcauth_wrap_req_encode(kxdreproc_t encode, struct rpc_rqst *rqstp,
|
|
__be32 *data, void *obj)
|
|
{
|
|
struct xdr_stream xdr;
|
|
|
|
xdr_init_encode(&xdr, &rqstp->rq_snd_buf, data);
|
|
encode(rqstp, &xdr, obj);
|
|
}
|
|
|
|
int
|
|
rpcauth_wrap_req(struct rpc_task *task, kxdreproc_t encode, void *rqstp,
|
|
__be32 *data, void *obj)
|
|
{
|
|
struct rpc_cred *cred = task->tk_rqstp->rq_cred;
|
|
|
|
dprintk("RPC: %5u using %s cred %p to wrap rpc data\n",
|
|
task->tk_pid, cred->cr_ops->cr_name, cred);
|
|
if (cred->cr_ops->crwrap_req)
|
|
return cred->cr_ops->crwrap_req(task, encode, rqstp, data, obj);
|
|
/* By default, we encode the arguments normally. */
|
|
rpcauth_wrap_req_encode(encode, rqstp, data, obj);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
rpcauth_unwrap_req_decode(kxdrdproc_t decode, struct rpc_rqst *rqstp,
|
|
__be32 *data, void *obj)
|
|
{
|
|
struct xdr_stream xdr;
|
|
|
|
xdr_init_decode(&xdr, &rqstp->rq_rcv_buf, data);
|
|
return decode(rqstp, &xdr, obj);
|
|
}
|
|
|
|
int
|
|
rpcauth_unwrap_resp(struct rpc_task *task, kxdrdproc_t decode, void *rqstp,
|
|
__be32 *data, void *obj)
|
|
{
|
|
struct rpc_cred *cred = task->tk_rqstp->rq_cred;
|
|
|
|
dprintk("RPC: %5u using %s cred %p to unwrap rpc data\n",
|
|
task->tk_pid, cred->cr_ops->cr_name, cred);
|
|
if (cred->cr_ops->crunwrap_resp)
|
|
return cred->cr_ops->crunwrap_resp(task, decode, rqstp,
|
|
data, obj);
|
|
/* By default, we decode the arguments normally. */
|
|
return rpcauth_unwrap_req_decode(decode, rqstp, data, obj);
|
|
}
|
|
|
|
int
|
|
rpcauth_refreshcred(struct rpc_task *task)
|
|
{
|
|
struct rpc_cred *cred;
|
|
int err;
|
|
|
|
cred = task->tk_rqstp->rq_cred;
|
|
if (cred == NULL) {
|
|
err = rpcauth_bindcred(task, task->tk_msg.rpc_cred, task->tk_flags);
|
|
if (err < 0)
|
|
goto out;
|
|
cred = task->tk_rqstp->rq_cred;
|
|
}
|
|
dprintk("RPC: %5u refreshing %s cred %p\n",
|
|
task->tk_pid, cred->cr_auth->au_ops->au_name, cred);
|
|
|
|
err = cred->cr_ops->crrefresh(task);
|
|
out:
|
|
if (err < 0)
|
|
task->tk_status = err;
|
|
return err;
|
|
}
|
|
|
|
void
|
|
rpcauth_invalcred(struct rpc_task *task)
|
|
{
|
|
struct rpc_cred *cred = task->tk_rqstp->rq_cred;
|
|
|
|
dprintk("RPC: %5u invalidating %s cred %p\n",
|
|
task->tk_pid, cred->cr_auth->au_ops->au_name, cred);
|
|
if (cred)
|
|
clear_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags);
|
|
}
|
|
|
|
int
|
|
rpcauth_uptodatecred(struct rpc_task *task)
|
|
{
|
|
struct rpc_cred *cred = task->tk_rqstp->rq_cred;
|
|
|
|
return cred == NULL ||
|
|
test_bit(RPCAUTH_CRED_UPTODATE, &cred->cr_flags) != 0;
|
|
}
|
|
|
|
static struct shrinker rpc_cred_shrinker = {
|
|
.shrink = rpcauth_cache_shrinker,
|
|
.seeks = DEFAULT_SEEKS,
|
|
};
|
|
|
|
int __init rpcauth_init_module(void)
|
|
{
|
|
int err;
|
|
|
|
err = rpc_init_authunix();
|
|
if (err < 0)
|
|
goto out1;
|
|
err = rpc_init_generic_auth();
|
|
if (err < 0)
|
|
goto out2;
|
|
register_shrinker(&rpc_cred_shrinker);
|
|
return 0;
|
|
out2:
|
|
rpc_destroy_authunix();
|
|
out1:
|
|
return err;
|
|
}
|
|
|
|
void rpcauth_remove_module(void)
|
|
{
|
|
rpc_destroy_authunix();
|
|
rpc_destroy_generic_auth();
|
|
unregister_shrinker(&rpc_cred_shrinker);
|
|
}
|