| | 1 | /* |
| | 2 | * Copyright (C) International Business Machines Corp., 2002-2004 |
| | 3 | * Copyright (C) Andreas Gruenbacher, 2001 |
| | 4 | * Copyright (C) Linus Torvalds, 1991, 1992 |
| | 5 | * |
| | 6 | * This program is free software; you can redistribute it and/or modify |
| | 7 | * it under the terms of the GNU General Public License as published by |
| | 8 | * the Free Software Foundation; either version 2 of the License, or |
| | 9 | * (at your option) any later version. |
| | 10 | * |
| | 11 | * This program is distributed in the hope that it will be useful, |
| | 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| | 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See |
| | 14 | * the GNU General Public License for more details. |
| | 15 | * |
| | 16 | * You should have received a copy of the GNU General Public License |
| | 17 | * along with this program; if not, write to the Free Software |
| | 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| | 19 | */ |
| | 20 | |
| | 21 | #include <linux/sched.h> |
| | 22 | #include <linux/slab.h> |
| | 23 | #include <linux/fs.h> |
| | 24 | #include <linux/posix_acl_xattr.h> |
| | 25 | #include "jfs_incore.h" |
| | 26 | #include "jfs_txnmgr.h" |
| | 27 | #include "jfs_xattr.h" |
| | 28 | #include "jfs_acl.h" |
| | 29 | |
| | 30 | struct posix_acl *jfs_get_acl(struct inode *inode, int type) |
| | 31 | { |
| | 32 | struct posix_acl *acl; |
| | 33 | char *ea_name; |
| | 34 | int size; |
| | 35 | char *value = NULL; |
| | 36 | |
| | 37 | switch(type) { |
| | 38 | case ACL_TYPE_ACCESS: |
| | 39 | ea_name = XATTR_NAME_POSIX_ACL_ACCESS; |
| | 40 | break; |
| | 41 | case ACL_TYPE_DEFAULT: |
| | 42 | ea_name = XATTR_NAME_POSIX_ACL_DEFAULT; |
| | 43 | break; |
| | 44 | default: |
| | 45 | return ERR_PTR(-EINVAL); |
| | 46 | } |
| | 47 | |
| | 48 | size = __jfs_getxattr(inode, ea_name, NULL, 0); |
| | 49 | |
| | 50 | if (size > 0) { |
| | 51 | value = kmalloc(size, GFP_KERNEL); |
| | 52 | if (!value) |
| | 53 | return ERR_PTR(-ENOMEM); |
| | 54 | size = __jfs_getxattr(inode, ea_name, value, size); |
| | 55 | } |
| | 56 | |
| | 57 | if (size < 0) { |
| | 58 | if (size == -ENODATA) |
| | 59 | acl = NULL; |
| | 60 | else |
| | 61 | acl = ERR_PTR(size); |
| | 62 | } else { |
| | 63 | acl = posix_acl_from_xattr(&init_user_ns, value, size); |
| | 64 | } |
| | 65 | kfree(value); |
| | 66 | return acl; |
| | 67 | } |
| | 68 | |
| | 69 | static int __jfs_set_acl(tid_t tid, struct inode *inode, int type, |
| | 70 | struct posix_acl *acl) |
| | 71 | { |
| | 72 | char *ea_name; |
| | 73 | int rc; |
| | 74 | int size = 0; |
| | 75 | char *value = NULL; |
| | 76 | |
| | 77 | switch (type) { |
| | 78 | case ACL_TYPE_ACCESS: |
| | 79 | ea_name = XATTR_NAME_POSIX_ACL_ACCESS; |
| | 80 | if (acl) { |
| | 81 | rc = posix_acl_equiv_mode(acl, &inode->i_mode); |
| | 82 | if (rc < 0) |
| | 83 | return rc; |
| | 84 | inode->i_ctime = CURRENT_TIME; |
| | 85 | mark_inode_dirty(inode); |
| | 86 | if (rc == 0) |
| | 87 | acl = NULL; |
| | 88 | } |
| | 89 | break; |
| | 90 | case ACL_TYPE_DEFAULT: |
| | 91 | ea_name = XATTR_NAME_POSIX_ACL_DEFAULT; |
| | 92 | break; |
| | 93 | default: |
| | 94 | return -EINVAL; |
| | 95 | } |
| | 96 | |
| | 97 | if (acl) { |
| | 98 | size = posix_acl_xattr_size(acl->a_count); |
| | 99 | value = kmalloc(size, GFP_KERNEL); |
| | 100 | if (!value) |
| | 101 | return -ENOMEM; |
| | 102 | rc = posix_acl_to_xattr(&init_user_ns, acl, value, size); |
| | 103 | if (rc < 0) |
| | 104 | goto out; |
| | 105 | } |
| | 106 | rc = __jfs_setxattr(tid, inode, ea_name, value, size, 0); |
| | 107 | out: |
| | 108 | kfree(value); |
| | 109 | |
| | 110 | if (!rc) |
| | 111 | set_cached_acl(inode, type, acl); |
| | 112 | |
| | 113 | return rc; |
| | 114 | } |
| | 115 | |
| | 116 | int jfs_set_acl(struct inode *inode, struct posix_acl *acl, int type) |
| | 117 | { |
| | 118 | int rc; |
| | 119 | tid_t tid; |
| | 120 | |
| | 121 | tid = txBegin(inode->i_sb, 0); |
| | 122 | mutex_lock(&JFS_IP(inode)->commit_mutex); |
| | 123 | rc = __jfs_set_acl(tid, inode, type, acl); |
| | 124 | if (!rc) |
| | 125 | rc = txCommit(tid, 1, &inode, 0); |
| | 126 | txEnd(tid); |
| | 127 | mutex_unlock(&JFS_IP(inode)->commit_mutex); |
| | 128 | return rc; |
| | 129 | } |
| | 130 | |
| | 131 | int jfs_init_acl(tid_t tid, struct inode *inode, struct inode *dir) |
| | 132 | { |
| | 133 | struct posix_acl *default_acl, *acl; |
| | 134 | int rc = 0; |
| | 135 | |
| | 136 | rc = posix_acl_create(dir, &inode->i_mode, &default_acl, &acl); |
| | 137 | if (rc) |
| | 138 | return rc; |
| | 139 | |
| | 140 | if (default_acl) { |
| | 141 | rc = __jfs_set_acl(tid, inode, ACL_TYPE_DEFAULT, default_acl); |
| | 142 | posix_acl_release(default_acl); |
| | 143 | } |
| | 144 | |
| | 145 | if (acl) { |
| | 146 | if (!rc) |
| | 147 | rc = __jfs_set_acl(tid, inode, ACL_TYPE_ACCESS, acl); |
| | 148 | posix_acl_release(acl); |
| | 149 | } |
| | 150 | |
| | 151 | JFS_IP(inode)->mode2 = (JFS_IP(inode)->mode2 & 0xffff0000) | |
| | 152 | inode->i_mode; |
| | 153 | |
| | 154 | return rc; |
| | 155 | } |
projects / linux-2.6-block.git / blame_incremental