Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 |
Dave Kleikamp | 63f83c9 | 2006-10-02 09:55:27 -0500 | [diff] [blame] | 8 | * the Free Software Foundation; either version 2 of the License, or |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 9 | * (at your option) any later version. |
Dave Kleikamp | 63f83c9 | 2006-10-02 09:55:27 -0500 | [diff] [blame] | 10 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 |
Dave Kleikamp | 63f83c9 | 2006-10-02 09:55:27 -0500 | [diff] [blame] | 17 | * along with this program; if not, write to the Free Software |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | */ |
| 20 | |
| 21 | #include <linux/sched.h> |
| 22 | #include <linux/fs.h> |
| 23 | #include <linux/quotaops.h> |
Christoph Hellwig | 9a59f45 | 2005-06-23 00:10:19 -0700 | [diff] [blame] | 24 | #include <linux/posix_acl_xattr.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include "jfs_incore.h" |
Dave Kleikamp | 4f4b401 | 2005-09-01 09:02:43 -0500 | [diff] [blame] | 26 | #include "jfs_txnmgr.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include "jfs_xattr.h" |
| 28 | #include "jfs_acl.h" |
| 29 | |
| 30 | static struct posix_acl *jfs_get_acl(struct inode *inode, int type) |
| 31 | { |
| 32 | struct posix_acl *acl; |
| 33 | char *ea_name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | int size; |
| 35 | char *value = NULL; |
| 36 | |
Al Viro | 073aaa1 | 2009-06-09 12:11:54 -0400 | [diff] [blame] | 37 | acl = get_cached_acl(inode, type); |
| 38 | if (acl != ACL_NOT_CACHED) |
| 39 | return acl; |
| 40 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | switch(type) { |
| 42 | case ACL_TYPE_ACCESS: |
Christoph Hellwig | 9a59f45 | 2005-06-23 00:10:19 -0700 | [diff] [blame] | 43 | ea_name = POSIX_ACL_XATTR_ACCESS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | break; |
| 45 | case ACL_TYPE_DEFAULT: |
Christoph Hellwig | 9a59f45 | 2005-06-23 00:10:19 -0700 | [diff] [blame] | 46 | ea_name = POSIX_ACL_XATTR_DEFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | break; |
| 48 | default: |
| 49 | return ERR_PTR(-EINVAL); |
| 50 | } |
| 51 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | size = __jfs_getxattr(inode, ea_name, NULL, 0); |
| 53 | |
| 54 | if (size > 0) { |
| 55 | value = kmalloc(size, GFP_KERNEL); |
| 56 | if (!value) |
| 57 | return ERR_PTR(-ENOMEM); |
| 58 | size = __jfs_getxattr(inode, ea_name, value, size); |
| 59 | } |
| 60 | |
| 61 | if (size < 0) { |
Al Viro | 073aaa1 | 2009-06-09 12:11:54 -0400 | [diff] [blame] | 62 | if (size == -ENODATA) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | acl = NULL; |
Al Viro | 073aaa1 | 2009-06-09 12:11:54 -0400 | [diff] [blame] | 64 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | acl = ERR_PTR(size); |
| 66 | } else { |
| 67 | acl = posix_acl_from_xattr(value, size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | } |
Jesper Juhl | 259692b | 2005-05-09 10:47:14 -0500 | [diff] [blame] | 69 | kfree(value); |
Al Viro | 073aaa1 | 2009-06-09 12:11:54 -0400 | [diff] [blame] | 70 | if (!IS_ERR(acl)) { |
| 71 | set_cached_acl(inode, type, acl); |
| 72 | posix_acl_release(acl); |
| 73 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | return acl; |
| 75 | } |
| 76 | |
Dave Kleikamp | 4f4b401 | 2005-09-01 09:02:43 -0500 | [diff] [blame] | 77 | static int jfs_set_acl(tid_t tid, struct inode *inode, int type, |
| 78 | struct posix_acl *acl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | { |
| 80 | char *ea_name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | int rc; |
| 82 | int size = 0; |
| 83 | char *value = NULL; |
| 84 | |
| 85 | if (S_ISLNK(inode->i_mode)) |
| 86 | return -EOPNOTSUPP; |
| 87 | |
| 88 | switch(type) { |
| 89 | case ACL_TYPE_ACCESS: |
Christoph Hellwig | 9a59f45 | 2005-06-23 00:10:19 -0700 | [diff] [blame] | 90 | ea_name = POSIX_ACL_XATTR_ACCESS; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | break; |
| 92 | case ACL_TYPE_DEFAULT: |
Christoph Hellwig | 9a59f45 | 2005-06-23 00:10:19 -0700 | [diff] [blame] | 93 | ea_name = POSIX_ACL_XATTR_DEFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | if (!S_ISDIR(inode->i_mode)) |
| 95 | return acl ? -EACCES : 0; |
| 96 | break; |
| 97 | default: |
| 98 | return -EINVAL; |
| 99 | } |
| 100 | if (acl) { |
Christoph Hellwig | 9a59f45 | 2005-06-23 00:10:19 -0700 | [diff] [blame] | 101 | size = posix_acl_xattr_size(acl->a_count); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | value = kmalloc(size, GFP_KERNEL); |
| 103 | if (!value) |
| 104 | return -ENOMEM; |
| 105 | rc = posix_acl_to_xattr(acl, value, size); |
| 106 | if (rc < 0) |
| 107 | goto out; |
| 108 | } |
Dave Kleikamp | 4f4b401 | 2005-09-01 09:02:43 -0500 | [diff] [blame] | 109 | rc = __jfs_setxattr(tid, inode, ea_name, value, size, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | out: |
Jesper Juhl | 259692b | 2005-05-09 10:47:14 -0500 | [diff] [blame] | 111 | kfree(value); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 112 | |
Al Viro | 073aaa1 | 2009-06-09 12:11:54 -0400 | [diff] [blame] | 113 | if (!rc) |
| 114 | set_cached_acl(inode, type, acl); |
| 115 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | return rc; |
| 117 | } |
| 118 | |
| 119 | static int jfs_check_acl(struct inode *inode, int mask) |
| 120 | { |
Al Viro | d5bb68a | 2009-06-24 17:02:42 -0400 | [diff] [blame] | 121 | struct posix_acl *acl = jfs_get_acl(inode, ACL_TYPE_ACCESS); |
| 122 | |
| 123 | if (IS_ERR(acl)) |
| 124 | return PTR_ERR(acl); |
| 125 | if (acl) { |
| 126 | int error = posix_acl_permission(inode, acl, mask); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | posix_acl_release(acl); |
Al Viro | d5bb68a | 2009-06-24 17:02:42 -0400 | [diff] [blame] | 128 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | } |
| 130 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | return -EAGAIN; |
| 132 | } |
| 133 | |
Al Viro | e6305c4 | 2008-07-15 21:03:57 -0400 | [diff] [blame] | 134 | int jfs_permission(struct inode *inode, int mask) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | { |
| 136 | return generic_permission(inode, mask, jfs_check_acl); |
| 137 | } |
| 138 | |
Dave Kleikamp | 4f4b401 | 2005-09-01 09:02:43 -0500 | [diff] [blame] | 139 | int jfs_init_acl(tid_t tid, struct inode *inode, struct inode *dir) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | { |
| 141 | struct posix_acl *acl = NULL; |
| 142 | struct posix_acl *clone; |
| 143 | mode_t mode; |
| 144 | int rc = 0; |
| 145 | |
| 146 | if (S_ISLNK(inode->i_mode)) |
| 147 | return 0; |
| 148 | |
| 149 | acl = jfs_get_acl(dir, ACL_TYPE_DEFAULT); |
| 150 | if (IS_ERR(acl)) |
| 151 | return PTR_ERR(acl); |
| 152 | |
| 153 | if (acl) { |
| 154 | if (S_ISDIR(inode->i_mode)) { |
Dave Kleikamp | 4f4b401 | 2005-09-01 09:02:43 -0500 | [diff] [blame] | 155 | rc = jfs_set_acl(tid, inode, ACL_TYPE_DEFAULT, acl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | if (rc) |
| 157 | goto cleanup; |
| 158 | } |
| 159 | clone = posix_acl_clone(acl, GFP_KERNEL); |
| 160 | if (!clone) { |
| 161 | rc = -ENOMEM; |
| 162 | goto cleanup; |
| 163 | } |
| 164 | mode = inode->i_mode; |
| 165 | rc = posix_acl_create_masq(clone, &mode); |
| 166 | if (rc >= 0) { |
| 167 | inode->i_mode = mode; |
| 168 | if (rc > 0) |
Dave Kleikamp | 4f4b401 | 2005-09-01 09:02:43 -0500 | [diff] [blame] | 169 | rc = jfs_set_acl(tid, inode, ACL_TYPE_ACCESS, |
| 170 | clone); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | } |
| 172 | posix_acl_release(clone); |
| 173 | cleanup: |
| 174 | posix_acl_release(acl); |
| 175 | } else |
Al Viro | ce3b0f8 | 2009-03-29 19:08:22 -0400 | [diff] [blame] | 176 | inode->i_mode &= ~current_umask(); |
Dave Kleikamp | 63f83c9 | 2006-10-02 09:55:27 -0500 | [diff] [blame] | 177 | |
Dave Kleikamp | 69eb66d | 2006-03-09 13:59:30 -0600 | [diff] [blame] | 178 | JFS_IP(inode)->mode2 = (JFS_IP(inode)->mode2 & 0xffff0000) | |
| 179 | inode->i_mode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | |
| 181 | return rc; |
| 182 | } |
| 183 | |
| 184 | static int jfs_acl_chmod(struct inode *inode) |
| 185 | { |
| 186 | struct posix_acl *acl, *clone; |
| 187 | int rc; |
| 188 | |
| 189 | if (S_ISLNK(inode->i_mode)) |
| 190 | return -EOPNOTSUPP; |
| 191 | |
| 192 | acl = jfs_get_acl(inode, ACL_TYPE_ACCESS); |
| 193 | if (IS_ERR(acl) || !acl) |
| 194 | return PTR_ERR(acl); |
| 195 | |
| 196 | clone = posix_acl_clone(acl, GFP_KERNEL); |
| 197 | posix_acl_release(acl); |
| 198 | if (!clone) |
| 199 | return -ENOMEM; |
| 200 | |
| 201 | rc = posix_acl_chmod_masq(clone, inode->i_mode); |
Dave Kleikamp | 4f4b401 | 2005-09-01 09:02:43 -0500 | [diff] [blame] | 202 | if (!rc) { |
| 203 | tid_t tid = txBegin(inode->i_sb, 0); |
Ingo Molnar | 1de8744 | 2006-01-24 15:22:50 -0600 | [diff] [blame] | 204 | mutex_lock(&JFS_IP(inode)->commit_mutex); |
Dave Kleikamp | 4f4b401 | 2005-09-01 09:02:43 -0500 | [diff] [blame] | 205 | rc = jfs_set_acl(tid, inode, ACL_TYPE_ACCESS, clone); |
| 206 | if (!rc) |
| 207 | rc = txCommit(tid, 1, &inode, 0); |
| 208 | txEnd(tid); |
Ingo Molnar | 1de8744 | 2006-01-24 15:22:50 -0600 | [diff] [blame] | 209 | mutex_unlock(&JFS_IP(inode)->commit_mutex); |
Dave Kleikamp | 4f4b401 | 2005-09-01 09:02:43 -0500 | [diff] [blame] | 210 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | |
| 212 | posix_acl_release(clone); |
| 213 | return rc; |
| 214 | } |
| 215 | |
| 216 | int jfs_setattr(struct dentry *dentry, struct iattr *iattr) |
| 217 | { |
| 218 | struct inode *inode = dentry->d_inode; |
| 219 | int rc; |
| 220 | |
| 221 | rc = inode_change_ok(inode, iattr); |
| 222 | if (rc) |
| 223 | return rc; |
| 224 | |
| 225 | if ((iattr->ia_valid & ATTR_UID && iattr->ia_uid != inode->i_uid) || |
| 226 | (iattr->ia_valid & ATTR_GID && iattr->ia_gid != inode->i_gid)) { |
Jan Kara | c94d2a2 | 2009-01-26 17:22:32 +0100 | [diff] [blame] | 227 | if (vfs_dq_transfer(inode, iattr)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | return -EDQUOT; |
| 229 | } |
| 230 | |
| 231 | rc = inode_setattr(inode, iattr); |
| 232 | |
| 233 | if (!rc && (iattr->ia_valid & ATTR_MODE)) |
| 234 | rc = jfs_acl_chmod(inode); |
| 235 | |
| 236 | return rc; |
| 237 | } |