forked from luck/tmp_suning_uos_patched
1a59d1b8e0
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version 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 for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 59 temple place suite 330 boston ma 02111 1307 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 1334 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Richard Fontana <rfontana@redhat.com> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070033.113240726@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
154 lines
3.1 KiB
C
154 lines
3.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (C) International Business Machines Corp., 2002-2004
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* Copyright (C) Andreas Gruenbacher, 2001
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* Copyright (C) Linus Torvalds, 1991, 1992
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*/
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/fs.h>
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#include <linux/posix_acl_xattr.h>
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#include "jfs_incore.h"
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#include "jfs_txnmgr.h"
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#include "jfs_xattr.h"
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#include "jfs_acl.h"
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struct posix_acl *jfs_get_acl(struct inode *inode, int type)
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{
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struct posix_acl *acl;
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char *ea_name;
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int size;
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char *value = NULL;
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switch(type) {
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case ACL_TYPE_ACCESS:
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ea_name = XATTR_NAME_POSIX_ACL_ACCESS;
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break;
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case ACL_TYPE_DEFAULT:
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ea_name = XATTR_NAME_POSIX_ACL_DEFAULT;
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break;
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default:
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return ERR_PTR(-EINVAL);
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}
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size = __jfs_getxattr(inode, ea_name, NULL, 0);
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if (size > 0) {
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value = kmalloc(size, GFP_KERNEL);
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if (!value)
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return ERR_PTR(-ENOMEM);
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size = __jfs_getxattr(inode, ea_name, value, size);
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}
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if (size < 0) {
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if (size == -ENODATA)
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acl = NULL;
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else
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acl = ERR_PTR(size);
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} else {
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acl = posix_acl_from_xattr(&init_user_ns, value, size);
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}
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kfree(value);
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return acl;
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}
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static int __jfs_set_acl(tid_t tid, struct inode *inode, int type,
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struct posix_acl *acl)
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{
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char *ea_name;
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int rc;
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int size = 0;
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char *value = NULL;
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switch (type) {
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case ACL_TYPE_ACCESS:
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ea_name = XATTR_NAME_POSIX_ACL_ACCESS;
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break;
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case ACL_TYPE_DEFAULT:
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ea_name = XATTR_NAME_POSIX_ACL_DEFAULT;
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break;
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default:
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return -EINVAL;
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}
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if (acl) {
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size = posix_acl_xattr_size(acl->a_count);
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value = kmalloc(size, GFP_KERNEL);
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if (!value)
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return -ENOMEM;
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rc = posix_acl_to_xattr(&init_user_ns, acl, value, size);
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if (rc < 0)
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goto out;
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}
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rc = __jfs_setxattr(tid, inode, ea_name, value, size, 0);
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out:
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kfree(value);
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if (!rc)
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set_cached_acl(inode, type, acl);
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return rc;
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}
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int jfs_set_acl(struct inode *inode, struct posix_acl *acl, int type)
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{
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int rc;
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tid_t tid;
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int update_mode = 0;
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umode_t mode = inode->i_mode;
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tid = txBegin(inode->i_sb, 0);
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mutex_lock(&JFS_IP(inode)->commit_mutex);
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if (type == ACL_TYPE_ACCESS && acl) {
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rc = posix_acl_update_mode(inode, &mode, &acl);
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if (rc)
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goto end_tx;
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if (mode != inode->i_mode)
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update_mode = 1;
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}
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rc = __jfs_set_acl(tid, inode, type, acl);
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if (!rc) {
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if (update_mode) {
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inode->i_mode = mode;
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inode->i_ctime = current_time(inode);
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mark_inode_dirty(inode);
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}
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rc = txCommit(tid, 1, &inode, 0);
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}
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end_tx:
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txEnd(tid);
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mutex_unlock(&JFS_IP(inode)->commit_mutex);
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return rc;
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}
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int jfs_init_acl(tid_t tid, struct inode *inode, struct inode *dir)
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{
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struct posix_acl *default_acl, *acl;
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int rc = 0;
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rc = posix_acl_create(dir, &inode->i_mode, &default_acl, &acl);
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if (rc)
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return rc;
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if (default_acl) {
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rc = __jfs_set_acl(tid, inode, ACL_TYPE_DEFAULT, default_acl);
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posix_acl_release(default_acl);
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} else {
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inode->i_default_acl = NULL;
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}
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if (acl) {
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if (!rc)
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rc = __jfs_set_acl(tid, inode, ACL_TYPE_ACCESS, acl);
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posix_acl_release(acl);
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} else {
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inode->i_acl = NULL;
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}
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JFS_IP(inode)->mode2 = (JFS_IP(inode)->mode2 & 0xffff0000) |
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inode->i_mode;
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return rc;
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}
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