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Diffstat (limited to 'drivers/staging/lustre/lustre/obdclass/acl.c')
-rw-r--r--drivers/staging/lustre/lustre/obdclass/acl.c415
1 files changed, 0 insertions, 415 deletions
diff --git a/drivers/staging/lustre/lustre/obdclass/acl.c b/drivers/staging/lustre/lustre/obdclass/acl.c
deleted file mode 100644
index 0e02ae97b..000000000
--- a/drivers/staging/lustre/lustre/obdclass/acl.c
+++ /dev/null
@@ -1,415 +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/acl.c
- *
- * Lustre Access Control List.
- *
- * Author: Fan Yong <fanyong@clusterfs.com>
- */
-
-#define DEBUG_SUBSYSTEM S_SEC
-#include "../include/lu_object.h"
-#include "../include/lustre_acl.h"
-#include "../include/lustre_eacl.h"
-#include "../include/obd_support.h"
-
-#ifdef CONFIG_FS_POSIX_ACL
-
-#define CFS_ACL_XATTR_VERSION POSIX_ACL_XATTR_VERSION
-
-enum {
- ES_UNK = 0, /* unknown stat */
- ES_UNC = 1, /* ACL entry is not changed */
- ES_MOD = 2, /* ACL entry is modified */
- ES_ADD = 3, /* ACL entry is added */
- ES_DEL = 4 /* ACL entry is deleted */
-};
-
-static inline void lustre_ext_acl_le_to_cpu(ext_acl_xattr_entry *d,
- ext_acl_xattr_entry *s)
-{
- d->e_tag = le16_to_cpu(s->e_tag);
- d->e_perm = le16_to_cpu(s->e_perm);
- d->e_id = le32_to_cpu(s->e_id);
- d->e_stat = le32_to_cpu(s->e_stat);
-}
-
-static inline void lustre_ext_acl_cpu_to_le(ext_acl_xattr_entry *d,
- ext_acl_xattr_entry *s)
-{
- d->e_tag = cpu_to_le16(s->e_tag);
- d->e_perm = cpu_to_le16(s->e_perm);
- d->e_id = cpu_to_le32(s->e_id);
- d->e_stat = cpu_to_le32(s->e_stat);
-}
-
-static inline void lustre_posix_acl_le_to_cpu(posix_acl_xattr_entry *d,
- posix_acl_xattr_entry *s)
-{
- d->e_tag = le16_to_cpu(s->e_tag);
- d->e_perm = le16_to_cpu(s->e_perm);
- d->e_id = le32_to_cpu(s->e_id);
-}
-
-static inline void lustre_posix_acl_cpu_to_le(posix_acl_xattr_entry *d,
- posix_acl_xattr_entry *s)
-{
- d->e_tag = cpu_to_le16(s->e_tag);
- d->e_perm = cpu_to_le16(s->e_perm);
- d->e_id = cpu_to_le32(s->e_id);
-}
-
-/* if "new_count == 0", then "new = {a_version, NULL}", NOT NULL. */
-static int lustre_posix_acl_xattr_reduce_space(posix_acl_xattr_header **header,
- int old_count, int new_count)
-{
- int old_size = CFS_ACL_XATTR_SIZE(old_count, posix_acl_xattr);
- int new_size = CFS_ACL_XATTR_SIZE(new_count, posix_acl_xattr);
- posix_acl_xattr_header *new;
-
- if (unlikely(old_count <= new_count))
- return old_size;
-
- new = kmemdup(*header, new_size, GFP_NOFS);
- if (unlikely(!new))
- return -ENOMEM;
-
- kfree(*header);
- *header = new;
- return new_size;
-}
-
-/* if "new_count == 0", then "new = {0, NULL}", NOT NULL. */
-static int lustre_ext_acl_xattr_reduce_space(ext_acl_xattr_header **header,
- int old_count)
-{
- int ext_count = le32_to_cpu((*header)->a_count);
- int ext_size = CFS_ACL_XATTR_SIZE(ext_count, ext_acl_xattr);
- ext_acl_xattr_header *new;
-
- if (unlikely(old_count <= ext_count))
- return 0;
-
- new = kmemdup(*header, ext_size, GFP_NOFS);
- if (unlikely(!new))
- return -ENOMEM;
-
- kfree(*header);
- *header = new;
- return 0;
-}
-
-/*
- * Generate new extended ACL based on the posix ACL.
- */
-ext_acl_xattr_header *
-lustre_posix_acl_xattr_2ext(posix_acl_xattr_header *header, int size)
-{
- int count, i, esize;
- ext_acl_xattr_header *new;
-
- if (unlikely(size < 0))
- return ERR_PTR(-EINVAL);
- else if (!size)
- count = 0;
- else
- count = CFS_ACL_XATTR_COUNT(size, posix_acl_xattr);
- esize = CFS_ACL_XATTR_SIZE(count, ext_acl_xattr);
- new = kzalloc(esize, GFP_NOFS);
- if (unlikely(!new))
- return ERR_PTR(-ENOMEM);
-
- new->a_count = cpu_to_le32(count);
- for (i = 0; i < count; i++) {
- new->a_entries[i].e_tag = header->a_entries[i].e_tag;
- new->a_entries[i].e_perm = header->a_entries[i].e_perm;
- new->a_entries[i].e_id = header->a_entries[i].e_id;
- new->a_entries[i].e_stat = cpu_to_le32(ES_UNK);
- }
-
- return new;
-}
-EXPORT_SYMBOL(lustre_posix_acl_xattr_2ext);
-
-/*
- * Filter out the "nobody" entries in the posix ACL.
- */
-int lustre_posix_acl_xattr_filter(posix_acl_xattr_header *header, size_t size,
- posix_acl_xattr_header **out)
-{
- int count, i, j, rc = 0;
- __u32 id;
- posix_acl_xattr_header *new;
-
- if (!size)
- return 0;
- if (size < sizeof(*new))
- return -EINVAL;
-
- new = kzalloc(size, GFP_NOFS);
- if (unlikely(!new))
- return -ENOMEM;
-
- new->a_version = cpu_to_le32(CFS_ACL_XATTR_VERSION);
- count = CFS_ACL_XATTR_COUNT(size, posix_acl_xattr);
- for (i = 0, j = 0; i < count; i++) {
- id = le32_to_cpu(header->a_entries[i].e_id);
- switch (le16_to_cpu(header->a_entries[i].e_tag)) {
- case ACL_USER_OBJ:
- case ACL_GROUP_OBJ:
- case ACL_MASK:
- case ACL_OTHER:
- if (id != ACL_UNDEFINED_ID) {
- rc = -EIO;
- goto _out;
- }
-
- memcpy(&new->a_entries[j++], &header->a_entries[i],
- sizeof(posix_acl_xattr_entry));
- break;
- case ACL_USER:
- if (id != NOBODY_UID)
- memcpy(&new->a_entries[j++],
- &header->a_entries[i],
- sizeof(posix_acl_xattr_entry));
- break;
- case ACL_GROUP:
- if (id != NOBODY_GID)
- memcpy(&new->a_entries[j++],
- &header->a_entries[i],
- sizeof(posix_acl_xattr_entry));
- break;
- default:
- rc = -EIO;
- goto _out;
- }
- }
-
- /* free unused space. */
- rc = lustre_posix_acl_xattr_reduce_space(&new, count, j);
- if (rc >= 0) {
- size = rc;
- *out = new;
- rc = 0;
- }
-
-_out:
- if (rc) {
- kfree(new);
- size = rc;
- }
- return size;
-}
-EXPORT_SYMBOL(lustre_posix_acl_xattr_filter);
-
-/*
- * Release the extended ACL space.
- */
-void lustre_ext_acl_xattr_free(ext_acl_xattr_header *header)
-{
- kfree(header);
-}
-EXPORT_SYMBOL(lustre_ext_acl_xattr_free);
-
-static ext_acl_xattr_entry *
-lustre_ext_acl_xattr_search(ext_acl_xattr_header *header,
- posix_acl_xattr_entry *entry, int *pos)
-{
- int once, start, end, i, j, count = le32_to_cpu(header->a_count);
-
- once = 0;
- start = *pos;
- end = count;
-
-again:
- for (i = start; i < end; i++) {
- if (header->a_entries[i].e_tag == entry->e_tag &&
- header->a_entries[i].e_id == entry->e_id) {
- j = i;
- if (++i >= count)
- i = 0;
- *pos = i;
- return &header->a_entries[j];
- }
- }
-
- if (!once) {
- once = 1;
- start = 0;
- end = *pos;
- goto again;
- }
-
- return NULL;
-}
-
-/*
- * Merge the posix ACL and the extended ACL into new extended ACL.
- */
-ext_acl_xattr_header *
-lustre_acl_xattr_merge2ext(posix_acl_xattr_header *posix_header, int size,
- ext_acl_xattr_header *ext_header)
-{
- int ori_ext_count, posix_count, ext_count, ext_size;
- int i, j, pos = 0, rc = 0;
- posix_acl_xattr_entry pae;
- ext_acl_xattr_header *new;
- ext_acl_xattr_entry *ee, eae;
-
- if (unlikely(size < 0))
- return ERR_PTR(-EINVAL);
- else if (!size)
- posix_count = 0;
- else
- posix_count = CFS_ACL_XATTR_COUNT(size, posix_acl_xattr);
- ori_ext_count = le32_to_cpu(ext_header->a_count);
- ext_count = posix_count + ori_ext_count;
- ext_size = CFS_ACL_XATTR_SIZE(ext_count, ext_acl_xattr);
-
- new = kzalloc(ext_size, GFP_NOFS);
- if (unlikely(!new))
- return ERR_PTR(-ENOMEM);
-
- for (i = 0, j = 0; i < posix_count; i++) {
- lustre_posix_acl_le_to_cpu(&pae, &posix_header->a_entries[i]);
- switch (pae.e_tag) {
- case ACL_USER_OBJ:
- case ACL_GROUP_OBJ:
- case ACL_MASK:
- case ACL_OTHER:
- if (pae.e_id != ACL_UNDEFINED_ID) {
- rc = -EIO;
- goto out;
- }
- case ACL_USER:
- /* ignore "nobody" entry. */
- if (pae.e_id == NOBODY_UID)
- break;
-
- new->a_entries[j].e_tag =
- posix_header->a_entries[i].e_tag;
- new->a_entries[j].e_perm =
- posix_header->a_entries[i].e_perm;
- new->a_entries[j].e_id =
- posix_header->a_entries[i].e_id;
- ee = lustre_ext_acl_xattr_search(ext_header,
- &posix_header->a_entries[i], &pos);
- if (ee) {
- if (posix_header->a_entries[i].e_perm !=
- ee->e_perm)
- /* entry modified. */
- ee->e_stat =
- new->a_entries[j++].e_stat =
- cpu_to_le32(ES_MOD);
- else
- /* entry unchanged. */
- ee->e_stat =
- new->a_entries[j++].e_stat =
- cpu_to_le32(ES_UNC);
- } else {
- /* new entry. */
- new->a_entries[j++].e_stat =
- cpu_to_le32(ES_ADD);
- }
- break;
- case ACL_GROUP:
- /* ignore "nobody" entry. */
- if (pae.e_id == NOBODY_GID)
- break;
- new->a_entries[j].e_tag =
- posix_header->a_entries[i].e_tag;
- new->a_entries[j].e_perm =
- posix_header->a_entries[i].e_perm;
- new->a_entries[j].e_id =
- posix_header->a_entries[i].e_id;
- ee = lustre_ext_acl_xattr_search(ext_header,
- &posix_header->a_entries[i], &pos);
- if (ee) {
- if (posix_header->a_entries[i].e_perm !=
- ee->e_perm)
- /* entry modified. */
- ee->e_stat =
- new->a_entries[j++].e_stat =
- cpu_to_le32(ES_MOD);
- else
- /* entry unchanged. */
- ee->e_stat =
- new->a_entries[j++].e_stat =
- cpu_to_le32(ES_UNC);
- } else {
- /* new entry. */
- new->a_entries[j++].e_stat =
- cpu_to_le32(ES_ADD);
- }
- break;
- default:
- rc = -EIO;
- goto out;
- }
- }
-
- /* process deleted entries. */
- for (i = 0; i < ori_ext_count; i++) {
- lustre_ext_acl_le_to_cpu(&eae, &ext_header->a_entries[i]);
- if (eae.e_stat == ES_UNK) {
- /* ignore "nobody" entry. */
- if ((eae.e_tag == ACL_USER && eae.e_id == NOBODY_UID) ||
- (eae.e_tag == ACL_GROUP && eae.e_id == NOBODY_GID))
- continue;
-
- new->a_entries[j].e_tag =
- ext_header->a_entries[i].e_tag;
- new->a_entries[j].e_perm =
- ext_header->a_entries[i].e_perm;
- new->a_entries[j].e_id = ext_header->a_entries[i].e_id;
- new->a_entries[j++].e_stat = cpu_to_le32(ES_DEL);
- }
- }
-
- new->a_count = cpu_to_le32(j);
- /* free unused space. */
- rc = lustre_ext_acl_xattr_reduce_space(&new, ext_count);
-
-out:
- if (rc) {
- kfree(new);
- new = ERR_PTR(rc);
- }
- return new;
-}
-EXPORT_SYMBOL(lustre_acl_xattr_merge2ext);
-
-#endif
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-05 20:38:21 +0000