-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
+/*
+ * GPL HEADER START
*
- * Lustre Permission Cache for Remote Client
- * Author: Lai Siyao <lsy@clusterfs.com>
- * Author: Fan Yong <fanyong@clusterfs.com>
+ * 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.
*
- * Copyright (c) 2004-2006 Cluster File Systems, Inc.
+ * 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).
*
- * This file is part of Lustre, http://www.lustre.org.
+ * 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
*
- * Lustre is free software; you can redistribute it and/or
- * modify it under the terms of version 2 of the GNU General Public
- * License as published by the Free Software Foundation.
+ * 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.
*
- * Lustre 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 for more details.
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
*
- * You should have received a copy of the GNU General Public License
- * along with Lustre; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * Copyright (c) 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 <linux/random.h>
#include <linux/version.h>
#include <lustre_lite.h>
#include <lustre_param.h>
#include "llite_internal.h"
-cfs_mem_cache_t *ll_remote_perm_cachep = NULL;
-cfs_mem_cache_t *ll_rmtperm_hash_cachep = NULL;
+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;
+ struct ll_remote_perm *lrp;
- OBD_SLAB_ALLOC(lrp, ll_remote_perm_cachep, GFP_KERNEL, sizeof(*lrp));
- if (lrp)
- INIT_HLIST_NODE(&lrp->lrp_list);
- return lrp;
+ OBD_SLAB_ALLOC_PTR_GFP(lrp, ll_remote_perm_cachep, GFP_KERNEL);
+ if (lrp)
+ CFS_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);
+ if (!cfs_hlist_unhashed(&lrp->lrp_list))
+ cfs_hlist_del(&lrp->lrp_list);
OBD_SLAB_FREE(lrp, ll_remote_perm_cachep, sizeof(*lrp));
}
-struct hlist_head *alloc_rmtperm_hash(void)
+cfs_hlist_head_t *alloc_rmtperm_hash(void)
{
- struct hlist_head *hash;
+ cfs_hlist_head_t *hash;
int i;
- OBD_SLAB_ALLOC(hash, ll_rmtperm_hash_cachep, GFP_KERNEL,
- REMOTE_PERM_HASHSIZE * sizeof(*hash));
-
+ OBD_SLAB_ALLOC_GFP(hash, ll_rmtperm_hash_cachep,
+ REMOTE_PERM_HASHSIZE * sizeof(*hash),
+ GFP_IOFS);
if (!hash)
return NULL;
for (i = 0; i < REMOTE_PERM_HASHSIZE; i++)
- INIT_HLIST_HEAD(hash + i);
+ CFS_INIT_HLIST_HEAD(hash + i);
return hash;
}
-void free_rmtperm_hash(struct hlist_head *hash)
+void free_rmtperm_hash(cfs_hlist_head_t *hash)
{
int i;
struct ll_remote_perm *lrp;
- struct hlist_node *node, *next;
+ cfs_hlist_node_t *node, *next;
if(!hash)
return;
for (i = 0; i < REMOTE_PERM_HASHSIZE; i++)
- hlist_for_each_entry_safe(lrp, node, next, hash + i, lrp_list)
+ cfs_hlist_for_each_entry_safe(lrp, node, next, hash + i,
+ lrp_list)
free_ll_remote_perm(lrp);
OBD_SLAB_FREE(hash, ll_rmtperm_hash_cachep,
REMOTE_PERM_HASHSIZE * sizeof(*hash));
* MDT when client get remote permission. */
static int do_check_remote_perm(struct ll_inode_info *lli, int mask)
{
- struct hlist_head *head;
+ cfs_hlist_head_t *head;
struct ll_remote_perm *lrp;
- struct hlist_node *node;
+ cfs_hlist_node_t *node;
int found = 0, rc;
ENTRY;
if (!lli->lli_remote_perms)
RETURN(-ENOENT);
- head = lli->lli_remote_perms + remote_perm_hashfunc(current->uid);
+ head = lli->lli_remote_perms + remote_perm_hashfunc(cfs_curproc_uid());
- spin_lock(&lli->lli_lock);
- hlist_for_each_entry(lrp, node, head, lrp_list) {
- if (lrp->lrp_uid != current->uid)
+ spin_lock(&lli->lli_lock);
+ cfs_hlist_for_each_entry(lrp, node, head, lrp_list) {
+ if (lrp->lrp_uid != cfs_curproc_uid())
continue;
- if (lrp->lrp_gid != current->gid)
+ if (lrp->lrp_gid != cfs_curproc_gid())
continue;
- if (lrp->lrp_fsuid != current->fsuid)
+ if (lrp->lrp_fsuid != cfs_curproc_fsuid())
continue;
- if (lrp->lrp_fsgid != current->fsgid)
+ if (lrp->lrp_fsgid != cfs_curproc_fsgid())
continue;
found = 1;
break;
rc = ((lrp->lrp_access_perm & mask) == mask) ? 0 : -EACCES;
out:
- spin_unlock(&lli->lli_lock);
- return rc;
+ 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;
- struct hlist_node *node;
+ cfs_hlist_head_t *head, *perm_hash = NULL;
+ cfs_hlist_node_t *node;
ENTRY;
LASSERT(ll_i2sbi(inode)->ll_flags & LL_SBI_RMT_CLIENT);
}
}
- spin_lock(&lli->lli_lock);
+ spin_lock(&lli->lli_lock);
if (!lli->lli_remote_perms)
lli->lli_remote_perms = perm_hash;
head = lli->lli_remote_perms + remote_perm_hashfunc(perm->rp_uid);
again:
- hlist_for_each_entry(tmp, node, head, lrp_list) {
+ cfs_hlist_for_each_entry(tmp, node, head, lrp_list) {
if (tmp->lrp_uid != perm->rp_uid)
continue;
if (tmp->lrp_gid != perm->rp_gid)
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;
- }
+ 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_gid = perm->rp_gid;
lrp->lrp_fsuid = perm->rp_fsuid;
lrp->lrp_fsgid = perm->rp_fsgid;
- hlist_add_head(&lrp->lrp_list, head);
+ cfs_hlist_add_head(&lrp->lrp_list, head);
}
- lli->lli_rmtperm_utime = jiffies;
- spin_unlock(&lli->lli_lock);
+ 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,
struct ptlrpc_request *req = NULL;
struct mdt_remote_perm *perm;
struct obd_capa *oc;
- unsigned long utime;
+ cfs_time_t save;
int i = 0, rc;
ENTRY;
-check:
- utime = lli->lli_rmtperm_utime;
- rc = do_check_remote_perm(lli, mask);
- if (!rc || ((rc != -ENOENT) && i))
- RETURN(rc);
-
- might_sleep();
-
- down(&lli->lli_rmtperm_sem);
- /* check again */
- if (utime != lli->lli_rmtperm_utime) {
+ do {
+ save = lli->lli_rmtperm_time;
rc = do_check_remote_perm(lli, mask);
- if (!rc || ((rc != -ENOENT) && i)) {
- up(&lli->lli_rmtperm_sem);
- RETURN(rc);
+ if (!rc || (rc != -ENOENT && i))
+ break;
+
+ cfs_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();
- }
+ if (i++ > 5) {
+ CERROR("check remote perm falls in dead loop!\n");
+ LBUG();
+ }
- oc = ll_mdscapa_get(inode);
- rc = md_get_remote_perm(sbi->ll_md_exp, ll_inode2fid(inode), oc,
- ll_i2suppgid(inode), &req);
- capa_put(oc);
- if (rc) {
- up(&lli->lli_rmtperm_sem);
- RETURN(rc);
- }
+ oc = ll_mdscapa_get(inode);
+ rc = md_get_remote_perm(sbi->ll_md_exp, ll_inode2fid(inode), oc,
+ ll_i2suppgid(inode), &req);
+ capa_put(oc);
+ if (rc) {
+ mutex_unlock(&lli->lli_rmtperm_mutex);
+ break;
+ }
- perm = req_capsule_server_get(&req->rq_pill, &RMF_ACL);
- LASSERT(perm);
+ perm = req_capsule_server_swab_get(&req->rq_pill, &RMF_ACL,
+ lustre_swab_mdt_remote_perm);
+ if (unlikely(perm == NULL)) {
+ mutex_unlock(&lli->lli_rmtperm_mutex);
+ rc = -EPROTO;
+ break;
+ }
- rc = ll_update_remote_perm(inode, perm);
- up(&lli->lli_rmtperm_sem);
+ 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);
-
- if (rc == -ENOMEM)
- RETURN(rc);
-
- goto check;
+ RETURN(rc);
}
#if 0 /* NB: remote perms can't be freed in ll_mdc_blocking_ast of UPDATE lock,
void ll_free_remote_perms(struct inode *inode)
{
struct ll_inode_info *lli = ll_i2info(inode);
- struct hlist_head *hash = lli->lli_remote_perms;
+ cfs_hlist_head_t *hash = lli->lli_remote_perms;
struct ll_remote_perm *lrp;
- struct hlist_node *node, *next;
+ cfs_hlist_node_t *node, *next;
int i;
LASSERT(hash);
- spin_lock(&lli->lli_lock);
+ 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);
- }
+ for (i = 0; i < REMOTE_PERM_HASHSIZE; i++) {
+ cfs_hlist_for_each_entry_safe(lrp, node, next, hash + i,
+ lrp_list)
+ free_ll_remote_perm(lrp);
+ }
- spin_unlock(&lli->lli_lock);
+ spin_unlock(&lli->lli_lock);
}
#endif
git://git.whamcloud.com / fs / lustre-release.git / blobdiff