staging/lustre/obdclass: remove idmap.c

The functions defined in lustre/include/lustre_idmap.h are not used so
remove them.

Signed-off-by: John L. Hammond <john.hammond@intel.com>
Signed-off-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

3 files changed, 1 insertions, 582 deletions

diff --git a/drivers/staging/lustre/lustre/include/lustre_idmap.h b/drivers/staging/lustre/lustre/include/lustre_idmap.h
deleted file mode 100644
index 5624b8bae919..000000000000
--- a/drivers/staging/lustre/lustre/include/lustre_idmap.h
+++ /dev/null
@@ -1,104 +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) 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
diff --git a/drivers/staging/lustre/lustre/obdclass/Makefile b/drivers/staging/lustre/lustre/obdclass/Makefile
index ba10043fdd50..989fb7c6ee12 100644
--- a/drivers/staging/lustre/lustre/obdclass/Makefile
+++ b/drivers/staging/lustre/lustre/obdclass/Makefile
@@ -6,5 +6,5 @@ obdclass-y := linux/linux-module.o linux/linux-obdo.o linux/linux-sysctl.o \
 	      lustre_handles.o lustre_peer.o llog_osd.o \
 	      local_storage.o statfs_pack.o obdo.o obd_config.o obd_mount.o\
 	      mea.o lu_object.o dt_object.o capa.o cl_object.o   \
-	      cl_page.o cl_lock.o cl_io.o lu_ref.o acl.o idmap.o	   \
+	      cl_page.o cl_lock.o cl_io.o lu_ref.o acl.o \
 	      lu_ucred.o
diff --git a/drivers/staging/lustre/lustre/obdclass/idmap.c b/drivers/staging/lustre/lustre/obdclass/idmap.c
deleted file mode 100644
index 8c2f0b7a29fd..000000000000
--- a/drivers/staging/lustre/lustre/obdclass/idmap.c
+++ /dev/null
@@ -1,477 +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) 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);