+++ /dev/null
-/*
- * 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) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
- * Use is subject to license terms.
- *
- * Copyright (c) 2012, Intel Corporation.
- */
-/*
- * This file is part of Lustre, http://www.lustre.org/
- * Lustre is a trademark of Sun Microsystems, Inc.
- *
- * lustre/lustre/include/lustre_idmap.h
- *
- * MDS data structures.
- * See also lustre_idl.h for wire formats of requests.
- */
-
-#ifndef _LUSTRE_IDMAP_H
-#define _LUSTRE_IDMAP_H
-
-/** \defgroup idmap idmap
- *
- * @{
- */
-
-#include "../../include/linux/libcfs/libcfs.h"
-
-#define CFS_NGROUPS_PER_BLOCK ((int)(PAGE_CACHE_SIZE / sizeof(gid_t)))
-
-#define CFS_GROUP_AT(gi, i) \
- ((gi)->blocks[(i) / CFS_NGROUPS_PER_BLOCK][(i) % CFS_NGROUPS_PER_BLOCK])
-
-enum {
- CFS_IC_NOTHING = 0, /* convert nothing */
- CFS_IC_ALL = 1, /* convert all items */
- CFS_IC_MAPPED = 2, /* convert mapped uid/gid */
- CFS_IC_UNMAPPED = 3 /* convert unmapped uid/gid */
-};
-
-#define CFS_IDMAP_NOTFOUND (-1)
-
-#define CFS_IDMAP_HASHSIZE 32
-
-enum lustre_idmap_idx {
- RMT_UIDMAP_IDX,
- LCL_UIDMAP_IDX,
- RMT_GIDMAP_IDX,
- LCL_GIDMAP_IDX,
- CFS_IDMAP_N_HASHES
-};
-
-struct lustre_idmap_table {
- spinlock_t lit_lock;
- struct list_head lit_idmaps[CFS_IDMAP_N_HASHES][CFS_IDMAP_HASHSIZE];
-};
-
-struct lu_ucred;
-
-extern void lustre_groups_from_list(struct group_info *ginfo, gid_t *glist);
-extern void lustre_groups_sort(struct group_info *group_info);
-extern int lustre_in_group_p(struct lu_ucred *mu, gid_t grp);
-
-extern int lustre_idmap_add(struct lustre_idmap_table *t,
- uid_t ruid, uid_t luid,
- gid_t rgid, gid_t lgid);
-extern int lustre_idmap_del(struct lustre_idmap_table *t,
- uid_t ruid, uid_t luid,
- gid_t rgid, gid_t lgid);
-extern int lustre_idmap_lookup_uid(struct lu_ucred *mu,
- struct lustre_idmap_table *t,
- int reverse, uid_t uid);
-extern int lustre_idmap_lookup_gid(struct lu_ucred *mu,
- struct lustre_idmap_table *t,
- int reverse, gid_t gid);
-extern struct lustre_idmap_table *lustre_idmap_init(void);
-extern void lustre_idmap_fini(struct lustre_idmap_table *t);
-
-/** @} idmap */
-
-#endif
+++ /dev/null
-/*
- * 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) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
- * Use is subject to license terms.
- *
- * Copyright (c) 2012, Intel Corporation.
- */
-/*
- * This file is part of Lustre, http://www.lustre.org/
- * Lustre is a trademark of Sun Microsystems, Inc.
- *
- * lustre/obdclass/idmap.c
- *
- * Lustre user identity mapping.
- *
- * Author: Fan Yong <fanyong@clusterfs.com>
- */
-
-#define DEBUG_SUBSYSTEM S_SEC
-
-#include "../include/lustre_idmap.h"
-#include "../include/md_object.h"
-#include "../include/obd_support.h"
-
-#define lustre_get_group_info(group_info) do { \
- atomic_inc(&(group_info)->usage); \
-} while (0)
-
-#define lustre_put_group_info(group_info) do { \
- if (atomic_dec_and_test(&(group_info)->usage)) \
- groups_free(group_info); \
-} while (0)
-
-/*
- * groups_search() is copied from linux kernel!
- * A simple bsearch.
- */
-static int lustre_groups_search(const struct group_info *group_info, gid_t grp)
-{
- int left, right;
-
- if (!group_info)
- return 0;
-
- left = 0;
- right = group_info->ngroups;
- while (left < right) {
- int mid = (left + right) / 2;
- int cmp = grp -
- from_kgid(&init_user_ns, CFS_GROUP_AT(group_info, mid));
-
- if (cmp > 0)
- left = mid + 1;
- else if (cmp < 0)
- right = mid;
- else
- return 1;
- }
- return 0;
-}
-
-void lustre_groups_from_list(struct group_info *ginfo, gid_t *glist)
-{
- int i;
- int count = ginfo->ngroups;
-
- /* fill group_info from gid array */
- for (i = 0; i < ginfo->nblocks && count > 0; i++) {
- int cp_count = min(CFS_NGROUPS_PER_BLOCK, count);
- int off = i * CFS_NGROUPS_PER_BLOCK;
- int len = cp_count * sizeof(*glist);
-
- memcpy(ginfo->blocks[i], glist + off, len);
- count -= cp_count;
- }
-}
-EXPORT_SYMBOL(lustre_groups_from_list);
-
-/* groups_sort() is copied from linux kernel! */
-/* a simple shell-metzner sort */
-void lustre_groups_sort(struct group_info *group_info)
-{
- int base, max, stride;
- int gidsetsize = group_info->ngroups;
-
- for (stride = 1; stride < gidsetsize; stride = 3 * stride + 1)
- ; /* nothing */
- stride /= 3;
-
- while (stride) {
- max = gidsetsize - stride;
- for (base = 0; base < max; base++) {
- int left = base;
- int right = left + stride;
- gid_t tmp = from_kgid(&init_user_ns,
- CFS_GROUP_AT(group_info, right));
-
- while (left >= 0 &&
- tmp < from_kgid(&init_user_ns,
- CFS_GROUP_AT(group_info, left))) {
- CFS_GROUP_AT(group_info, right) =
- CFS_GROUP_AT(group_info, left);
- right = left;
- left -= stride;
- }
- CFS_GROUP_AT(group_info, right) =
- make_kgid(&init_user_ns, tmp);
- }
- stride /= 3;
- }
-}
-EXPORT_SYMBOL(lustre_groups_sort);
-
-int lustre_in_group_p(struct lu_ucred *mu, gid_t grp)
-{
- int rc = 1;
-
- if (grp != mu->uc_fsgid) {
- struct group_info *group_info = NULL;
-
- if (mu->uc_ginfo || !mu->uc_identity ||
- mu->uc_valid == UCRED_OLD)
- if (grp == mu->uc_suppgids[0] ||
- grp == mu->uc_suppgids[1])
- return 1;
-
- if (mu->uc_ginfo)
- group_info = mu->uc_ginfo;
- else if (mu->uc_identity)
- group_info = mu->uc_identity->mi_ginfo;
-
- if (!group_info)
- return 0;
-
- lustre_get_group_info(group_info);
- rc = lustre_groups_search(group_info, grp);
- lustre_put_group_info(group_info);
- }
- return rc;
-}
-EXPORT_SYMBOL(lustre_in_group_p);
-
-struct lustre_idmap_entry {
- struct list_head lie_rmt_uid_hash; /* hashed as lie_rmt_uid; */
- struct list_head lie_lcl_uid_hash; /* hashed as lie_lcl_uid; */
- struct list_head lie_rmt_gid_hash; /* hashed as lie_rmt_gid; */
- struct list_head lie_lcl_gid_hash; /* hashed as lie_lcl_gid; */
- uid_t lie_rmt_uid; /* remote uid */
- uid_t lie_lcl_uid; /* local uid */
- gid_t lie_rmt_gid; /* remote gid */
- gid_t lie_lcl_gid; /* local gid */
-};
-
-static inline __u32 lustre_idmap_hashfunc(__u32 id)
-{
- return id & (CFS_IDMAP_HASHSIZE - 1);
-}
-
-static
-struct lustre_idmap_entry *idmap_entry_alloc(uid_t rmt_uid, uid_t lcl_uid,
- gid_t rmt_gid, gid_t lcl_gid)
-{
- struct lustre_idmap_entry *e;
-
- OBD_ALLOC_PTR(e);
- if (e == NULL)
- return NULL;
-
- INIT_LIST_HEAD(&e->lie_rmt_uid_hash);
- INIT_LIST_HEAD(&e->lie_lcl_uid_hash);
- INIT_LIST_HEAD(&e->lie_rmt_gid_hash);
- INIT_LIST_HEAD(&e->lie_lcl_gid_hash);
- e->lie_rmt_uid = rmt_uid;
- e->lie_lcl_uid = lcl_uid;
- e->lie_rmt_gid = rmt_gid;
- e->lie_lcl_gid = lcl_gid;
-
- return e;
-}
-
-static void idmap_entry_free(struct lustre_idmap_entry *e)
-{
- if (!list_empty(&e->lie_rmt_uid_hash))
- list_del(&e->lie_rmt_uid_hash);
- if (!list_empty(&e->lie_lcl_uid_hash))
- list_del(&e->lie_lcl_uid_hash);
- if (!list_empty(&e->lie_rmt_gid_hash))
- list_del(&e->lie_rmt_gid_hash);
- if (!list_empty(&e->lie_lcl_gid_hash))
- list_del(&e->lie_lcl_gid_hash);
- OBD_FREE_PTR(e);
-}
-
-/*
- * return value
- * NULL: not found entry
- * ERR_PTR(-EACCES): found 1(remote):N(local) mapped entry
- * others: found normal entry
- */
-static
-struct lustre_idmap_entry *idmap_search_entry(struct lustre_idmap_table *t,
- uid_t rmt_uid, uid_t lcl_uid,
- gid_t rmt_gid, gid_t lcl_gid)
-{
- struct list_head *head;
- struct lustre_idmap_entry *e;
-
- head = &t->lit_idmaps[RMT_UIDMAP_IDX][lustre_idmap_hashfunc(rmt_uid)];
- list_for_each_entry(e, head, lie_rmt_uid_hash)
- if (e->lie_rmt_uid == rmt_uid) {
- if (e->lie_lcl_uid == lcl_uid) {
- if (e->lie_rmt_gid == rmt_gid &&
- e->lie_lcl_gid == lcl_gid)
- /* must be quaternion match */
- return e;
- } else {
- /* 1:N uid mapping */
- CERROR("rmt uid %u already be mapped to %u"
- " (new %u)\n", e->lie_rmt_uid,
- e->lie_lcl_uid, lcl_uid);
- return ERR_PTR(-EACCES);
- }
- }
-
- head = &t->lit_idmaps[RMT_GIDMAP_IDX][lustre_idmap_hashfunc(rmt_gid)];
- list_for_each_entry(e, head, lie_rmt_gid_hash)
- if (e->lie_rmt_gid == rmt_gid) {
- if (e->lie_lcl_gid == lcl_gid) {
- if (unlikely(e->lie_rmt_uid == rmt_uid &&
- e->lie_lcl_uid == lcl_uid))
- /* after uid mapping search above,
- * we should never come here */
- LBUG();
- } else {
- /* 1:N gid mapping */
- CERROR("rmt gid %u already be mapped to %u"
- " (new %u)\n", e->lie_rmt_gid,
- e->lie_lcl_gid, lcl_gid);
- return ERR_PTR(-EACCES);
- }
- }
-
- return NULL;
-}
-
-static __u32 idmap_lookup_uid(struct list_head *hash, int reverse,
- __u32 uid)
-{
- struct list_head *head = &hash[lustre_idmap_hashfunc(uid)];
- struct lustre_idmap_entry *e;
-
- if (!reverse) {
- list_for_each_entry(e, head, lie_rmt_uid_hash)
- if (e->lie_rmt_uid == uid)
- return e->lie_lcl_uid;
- } else {
- list_for_each_entry(e, head, lie_lcl_uid_hash)
- if (e->lie_lcl_uid == uid)
- return e->lie_rmt_uid;
- }
-
- return CFS_IDMAP_NOTFOUND;
-}
-
-static __u32 idmap_lookup_gid(struct list_head *hash, int reverse, __u32 gid)
-{
- struct list_head *head = &hash[lustre_idmap_hashfunc(gid)];
- struct lustre_idmap_entry *e;
-
- if (!reverse) {
- list_for_each_entry(e, head, lie_rmt_gid_hash)
- if (e->lie_rmt_gid == gid)
- return e->lie_lcl_gid;
- } else {
- list_for_each_entry(e, head, lie_lcl_gid_hash)
- if (e->lie_lcl_gid == gid)
- return e->lie_rmt_gid;
- }
-
- return CFS_IDMAP_NOTFOUND;
-}
-
-int lustre_idmap_add(struct lustre_idmap_table *t,
- uid_t ruid, uid_t luid,
- gid_t rgid, gid_t lgid)
-{
- struct lustre_idmap_entry *e0, *e1;
-
- LASSERT(t);
-
- spin_lock(&t->lit_lock);
- e0 = idmap_search_entry(t, ruid, luid, rgid, lgid);
- spin_unlock(&t->lit_lock);
- if (!e0) {
- e0 = idmap_entry_alloc(ruid, luid, rgid, lgid);
- if (!e0)
- return -ENOMEM;
-
- spin_lock(&t->lit_lock);
- e1 = idmap_search_entry(t, ruid, luid, rgid, lgid);
- if (e1 == NULL) {
- list_add_tail(&e0->lie_rmt_uid_hash,
- &t->lit_idmaps[RMT_UIDMAP_IDX]
- [lustre_idmap_hashfunc(ruid)]);
- list_add_tail(&e0->lie_lcl_uid_hash,
- &t->lit_idmaps[LCL_UIDMAP_IDX]
- [lustre_idmap_hashfunc(luid)]);
- list_add_tail(&e0->lie_rmt_gid_hash,
- &t->lit_idmaps[RMT_GIDMAP_IDX]
- [lustre_idmap_hashfunc(rgid)]);
- list_add_tail(&e0->lie_lcl_gid_hash,
- &t->lit_idmaps[LCL_GIDMAP_IDX]
- [lustre_idmap_hashfunc(lgid)]);
- }
- spin_unlock(&t->lit_lock);
- if (e1 != NULL) {
- idmap_entry_free(e0);
- if (IS_ERR(e1))
- return PTR_ERR(e1);
- }
- } else if (IS_ERR(e0)) {
- return PTR_ERR(e0);
- }
-
- return 0;
-}
-EXPORT_SYMBOL(lustre_idmap_add);
-
-int lustre_idmap_del(struct lustre_idmap_table *t,
- uid_t ruid, uid_t luid,
- gid_t rgid, gid_t lgid)
-{
- struct lustre_idmap_entry *e;
- int rc = 0;
-
- LASSERT(t);
-
- spin_lock(&t->lit_lock);
- e = idmap_search_entry(t, ruid, luid, rgid, lgid);
- if (IS_ERR(e))
- rc = PTR_ERR(e);
- else if (e)
- idmap_entry_free(e);
- spin_unlock(&t->lit_lock);
-
- return rc;
-}
-EXPORT_SYMBOL(lustre_idmap_del);
-
-int lustre_idmap_lookup_uid(struct lu_ucred *mu,
- struct lustre_idmap_table *t,
- int reverse, uid_t uid)
-{
- struct list_head *hash;
-
- if (mu && (mu->uc_valid == UCRED_OLD || mu->uc_valid == UCRED_NEW)) {
- if (!reverse) {
- if (uid == mu->uc_o_uid)
- return mu->uc_uid;
- else if (uid == mu->uc_o_fsuid)
- return mu->uc_fsuid;
- } else {
- if (uid == mu->uc_uid)
- return mu->uc_o_uid;
- else if (uid == mu->uc_fsuid)
- return mu->uc_o_fsuid;
- }
- }
-
- if (t == NULL)
- return CFS_IDMAP_NOTFOUND;
-
- hash = t->lit_idmaps[reverse ? LCL_UIDMAP_IDX : RMT_UIDMAP_IDX];
-
- spin_lock(&t->lit_lock);
- uid = idmap_lookup_uid(hash, reverse, uid);
- spin_unlock(&t->lit_lock);
-
- return uid;
-}
-EXPORT_SYMBOL(lustre_idmap_lookup_uid);
-
-int lustre_idmap_lookup_gid(struct lu_ucred *mu, struct lustre_idmap_table *t,
- int reverse, gid_t gid)
-{
- struct list_head *hash;
-
- if (mu && (mu->uc_valid == UCRED_OLD || mu->uc_valid == UCRED_NEW)) {
- if (!reverse) {
- if (gid == mu->uc_o_gid)
- return mu->uc_gid;
- else if (gid == mu->uc_o_fsgid)
- return mu->uc_fsgid;
- } else {
- if (gid == mu->uc_gid)
- return mu->uc_o_gid;
- else if (gid == mu->uc_fsgid)
- return mu->uc_o_fsgid;
- }
- }
-
- if (t == NULL)
- return CFS_IDMAP_NOTFOUND;
-
- hash = t->lit_idmaps[reverse ? LCL_GIDMAP_IDX : RMT_GIDMAP_IDX];
-
- spin_lock(&t->lit_lock);
- gid = idmap_lookup_gid(hash, reverse, gid);
- spin_unlock(&t->lit_lock);
-
- return gid;
-}
-EXPORT_SYMBOL(lustre_idmap_lookup_gid);
-
-struct lustre_idmap_table *lustre_idmap_init(void)
-{
- struct lustre_idmap_table *t;
- int i, j;
-
- OBD_ALLOC_PTR(t);
- if (unlikely(t == NULL))
- return ERR_PTR(-ENOMEM);
-
- spin_lock_init(&t->lit_lock);
- for (i = 0; i < ARRAY_SIZE(t->lit_idmaps); i++)
- for (j = 0; j < ARRAY_SIZE(t->lit_idmaps[i]); j++)
- INIT_LIST_HEAD(&t->lit_idmaps[i][j]);
-
- return t;
-}
-EXPORT_SYMBOL(lustre_idmap_init);
-
-void lustre_idmap_fini(struct lustre_idmap_table *t)
-{
- struct list_head *list;
- struct lustre_idmap_entry *e;
- int i;
- LASSERT(t);
-
- list = t->lit_idmaps[RMT_UIDMAP_IDX];
- spin_lock(&t->lit_lock);
- for (i = 0; i < CFS_IDMAP_HASHSIZE; i++)
- while (!list_empty(&list[i])) {
- e = list_entry(list[i].next,
- struct lustre_idmap_entry,
- lie_rmt_uid_hash);
- idmap_entry_free(e);
- }
- spin_unlock(&t->lit_lock);
-
- OBD_FREE_PTR(t);
-}
-EXPORT_SYMBOL(lustre_idmap_fini);
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