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Diffstat (limited to 'drivers/staging/lustre/lustre/llite/remote_perm.c')
-rw-r--r--drivers/staging/lustre/lustre/llite/remote_perm.c324
1 files changed, 0 insertions, 324 deletions
diff --git a/drivers/staging/lustre/lustre/llite/remote_perm.c b/drivers/staging/lustre/lustre/llite/remote_perm.c
deleted file mode 100644
index e9d25317c..000000000
--- a/drivers/staging/lustre/lustre/llite/remote_perm.c
+++ /dev/null
@@ -1,324 +0,0 @@
-/*
- * GPL HEADER START
- *
- * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 only,
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License version 2 for more details (a copy is included
- * in the LICENSE file that accompanied this code).
- *
- * You should have received a copy of the GNU General Public License
- * version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
- *
- * GPL HEADER END
- */
-/*
- * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
- * Use is subject to license terms.
- *
- * Copyright (c) 2011, 2012, Intel Corporation.
- */
-/*
- * This file is part of Lustre, http://www.lustre.org/
- * Lustre is a trademark of Sun Microsystems, Inc.
- *
- * lustre/llite/remote_perm.c
- *
- * Lustre Permission Cache for Remote Client
- *
- * Author: Lai Siyao <lsy@clusterfs.com>
- * Author: Fan Yong <fanyong@clusterfs.com>
- */
-
-#define DEBUG_SUBSYSTEM S_LLITE
-
-#include <linux/module.h>
-#include <linux/types.h>
-
-#include "../include/lustre_lite.h"
-#include "../include/lustre_ha.h"
-#include "../include/lustre_dlm.h"
-#include "../include/lprocfs_status.h"
-#include "../include/lustre_disk.h"
-#include "../include/lustre_param.h"
-#include "llite_internal.h"
-
-struct kmem_cache *ll_remote_perm_cachep;
-struct kmem_cache *ll_rmtperm_hash_cachep;
-
-static inline struct ll_remote_perm *alloc_ll_remote_perm(void)
-{
- struct ll_remote_perm *lrp;
-
- lrp = kmem_cache_zalloc(ll_remote_perm_cachep, GFP_KERNEL);
- if (lrp)
- INIT_HLIST_NODE(&lrp->lrp_list);
- return lrp;
-}
-
-static inline void free_ll_remote_perm(struct ll_remote_perm *lrp)
-{
- if (!lrp)
- return;
-
- if (!hlist_unhashed(&lrp->lrp_list))
- hlist_del(&lrp->lrp_list);
- kmem_cache_free(ll_remote_perm_cachep, lrp);
-}
-
-static struct hlist_head *alloc_rmtperm_hash(void)
-{
- struct hlist_head *hash;
- int i;
-
- hash = kmem_cache_zalloc(ll_rmtperm_hash_cachep, GFP_NOFS);
- if (!hash)
- return NULL;
-
- for (i = 0; i < REMOTE_PERM_HASHSIZE; i++)
- INIT_HLIST_HEAD(hash + i);
-
- return hash;
-}
-
-void free_rmtperm_hash(struct hlist_head *hash)
-{
- int i;
- struct ll_remote_perm *lrp;
- struct hlist_node *next;
-
- if (!hash)
- return;
-
- for (i = 0; i < REMOTE_PERM_HASHSIZE; i++)
- hlist_for_each_entry_safe(lrp, next, hash + i, lrp_list)
- free_ll_remote_perm(lrp);
- kmem_cache_free(ll_rmtperm_hash_cachep, hash);
-}
-
-static inline int remote_perm_hashfunc(uid_t uid)
-{
- return uid & (REMOTE_PERM_HASHSIZE - 1);
-}
-
-/* NB: setxid permission is not checked here, instead it's done on
- * MDT when client get remote permission.
- */
-static int do_check_remote_perm(struct ll_inode_info *lli, int mask)
-{
- struct hlist_head *head;
- struct ll_remote_perm *lrp;
- int found = 0, rc;
-
- if (!lli->lli_remote_perms)
- return -ENOENT;
-
- head = lli->lli_remote_perms +
- remote_perm_hashfunc(from_kuid(&init_user_ns, current_uid()));
-
- spin_lock(&lli->lli_lock);
- hlist_for_each_entry(lrp, head, lrp_list) {
- if (lrp->lrp_uid != from_kuid(&init_user_ns, current_uid()))
- continue;
- if (lrp->lrp_gid != from_kgid(&init_user_ns, current_gid()))
- continue;
- if (lrp->lrp_fsuid != from_kuid(&init_user_ns, current_fsuid()))
- continue;
- if (lrp->lrp_fsgid != from_kgid(&init_user_ns, current_fsgid()))
- continue;
- found = 1;
- break;
- }
-
- if (!found) {
- rc = -ENOENT;
- goto out;
- }
-
- CDEBUG(D_SEC, "found remote perm: %u/%u/%u/%u - %#x\n",
- lrp->lrp_uid, lrp->lrp_gid, lrp->lrp_fsuid, lrp->lrp_fsgid,
- lrp->lrp_access_perm);
- rc = ((lrp->lrp_access_perm & mask) == mask) ? 0 : -EACCES;
-
-out:
- spin_unlock(&lli->lli_lock);
- return rc;
-}
-
-int ll_update_remote_perm(struct inode *inode, struct mdt_remote_perm *perm)
-{
- struct ll_inode_info *lli = ll_i2info(inode);
- struct ll_remote_perm *lrp = NULL, *tmp = NULL;
- struct hlist_head *head, *perm_hash = NULL;
-
- LASSERT(ll_i2sbi(inode)->ll_flags & LL_SBI_RMT_CLIENT);
-
-#if 0
- if (perm->rp_uid != current->uid ||
- perm->rp_gid != current->gid ||
- perm->rp_fsuid != current->fsuid ||
- perm->rp_fsgid != current->fsgid) {
- /* user might setxid in this small period */
- CDEBUG(D_SEC,
- "remote perm user %u/%u/%u/%u != current %u/%u/%u/%u\n",
- perm->rp_uid, perm->rp_gid, perm->rp_fsuid,
- perm->rp_fsgid, current->uid, current->gid,
- current->fsuid, current->fsgid);
- return -EAGAIN;
- }
-#endif
-
- if (!lli->lli_remote_perms) {
- perm_hash = alloc_rmtperm_hash();
- if (!perm_hash) {
- CERROR("alloc lli_remote_perms failed!\n");
- return -ENOMEM;
- }
- }
-
- spin_lock(&lli->lli_lock);
-
- if (!lli->lli_remote_perms)
- lli->lli_remote_perms = perm_hash;
- else
- free_rmtperm_hash(perm_hash);
-
- head = lli->lli_remote_perms + remote_perm_hashfunc(perm->rp_uid);
-
-again:
- hlist_for_each_entry(tmp, head, lrp_list) {
- if (tmp->lrp_uid != perm->rp_uid)
- continue;
- if (tmp->lrp_gid != perm->rp_gid)
- continue;
- if (tmp->lrp_fsuid != perm->rp_fsuid)
- continue;
- if (tmp->lrp_fsgid != perm->rp_fsgid)
- continue;
- free_ll_remote_perm(lrp);
- lrp = tmp;
- break;
- }
-
- if (!lrp) {
- spin_unlock(&lli->lli_lock);
- lrp = alloc_ll_remote_perm();
- if (!lrp) {
- CERROR("alloc memory for ll_remote_perm failed!\n");
- return -ENOMEM;
- }
- spin_lock(&lli->lli_lock);
- goto again;
- }
-
- lrp->lrp_access_perm = perm->rp_access_perm;
- if (lrp != tmp) {
- lrp->lrp_uid = perm->rp_uid;
- lrp->lrp_gid = perm->rp_gid;
- lrp->lrp_fsuid = perm->rp_fsuid;
- lrp->lrp_fsgid = perm->rp_fsgid;
- hlist_add_head(&lrp->lrp_list, head);
- }
- lli->lli_rmtperm_time = cfs_time_current();
- spin_unlock(&lli->lli_lock);
-
- CDEBUG(D_SEC, "new remote perm@%p: %u/%u/%u/%u - %#x\n",
- lrp, lrp->lrp_uid, lrp->lrp_gid, lrp->lrp_fsuid, lrp->lrp_fsgid,
- lrp->lrp_access_perm);
-
- return 0;
-}
-
-int lustre_check_remote_perm(struct inode *inode, int mask)
-{
- struct ll_inode_info *lli = ll_i2info(inode);
- struct ll_sb_info *sbi = ll_i2sbi(inode);
- struct ptlrpc_request *req = NULL;
- struct mdt_remote_perm *perm;
- unsigned long save;
- int i = 0, rc;
-
- do {
- save = lli->lli_rmtperm_time;
- rc = do_check_remote_perm(lli, mask);
- if (!rc || (rc != -ENOENT && i))
- break;
-
- might_sleep();
-
- mutex_lock(&lli->lli_rmtperm_mutex);
- /* check again */
- if (save != lli->lli_rmtperm_time) {
- rc = do_check_remote_perm(lli, mask);
- if (!rc || (rc != -ENOENT && i)) {
- mutex_unlock(&lli->lli_rmtperm_mutex);
- break;
- }
- }
-
- if (i++ > 5) {
- CERROR("check remote perm falls in dead loop!\n");
- LBUG();
- }
-
- rc = md_get_remote_perm(sbi->ll_md_exp, ll_inode2fid(inode),
- ll_i2suppgid(inode), &req);
- if (rc) {
- mutex_unlock(&lli->lli_rmtperm_mutex);
- break;
- }
-
- perm = req_capsule_server_swab_get(&req->rq_pill, &RMF_ACL,
- lustre_swab_mdt_remote_perm);
- if (unlikely(!perm)) {
- mutex_unlock(&lli->lli_rmtperm_mutex);
- rc = -EPROTO;
- break;
- }
-
- rc = ll_update_remote_perm(inode, perm);
- mutex_unlock(&lli->lli_rmtperm_mutex);
- if (rc == -ENOMEM)
- break;
-
- ptlrpc_req_finished(req);
- req = NULL;
- } while (1);
- ptlrpc_req_finished(req);
- return rc;
-}
-
-#if 0 /* NB: remote perms can't be freed in ll_mdc_blocking_ast of UPDATE lock,
- * because it will fail sanity test 48.
- */
-void ll_free_remote_perms(struct inode *inode)
-{
- struct ll_inode_info *lli = ll_i2info(inode);
- struct hlist_head *hash = lli->lli_remote_perms;
- struct ll_remote_perm *lrp;
- struct hlist_node *node, *next;
- int i;
-
- LASSERT(hash);
-
- spin_lock(&lli->lli_lock);
-
- for (i = 0; i < REMOTE_PERM_HASHSIZE; i++) {
- hlist_for_each_entry_safe(lrp, node, next, hash + i, lrp_list)
- free_ll_remote_perm(lrp);
- }
-
- spin_unlock(&lli->lli_lock);
-}
-#endif
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-05 23:17:21 +0000