Aneesh Kumar K.V | 85ff872 | 2010-09-28 00:27:39 +0530 | [diff] [blame] | 1 | /* |
| 2 | * Copyright IBM Corporation, 2010 |
| 3 | * Author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of version 2.1 of the GNU Lesser General Public License |
| 7 | * as published by the Free Software Foundation. |
| 8 | * |
| 9 | * This program is distributed in the hope that it would be useful, but |
| 10 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| 12 | * |
| 13 | */ |
| 14 | |
| 15 | #include <linux/module.h> |
| 16 | #include <linux/fs.h> |
| 17 | #include <net/9p/9p.h> |
| 18 | #include <net/9p/client.h> |
| 19 | #include <linux/slab.h> |
Aneesh Kumar K.V | 22d8dcd | 2010-09-28 00:27:40 +0530 | [diff] [blame] | 20 | #include <linux/sched.h> |
Aneesh Kumar K.V | 85ff872 | 2010-09-28 00:27:39 +0530 | [diff] [blame] | 21 | #include <linux/posix_acl_xattr.h> |
| 22 | #include "xattr.h" |
| 23 | #include "acl.h" |
Aneesh Kumar K.V | 76381a4 | 2010-09-28 00:27:41 +0530 | [diff] [blame] | 24 | #include "v9fs.h" |
Aneesh Kumar K.V | 5ffc0cb | 2011-02-28 17:04:01 +0530 | [diff] [blame] | 25 | #include "v9fs_vfs.h" |
Al Viro | 0f235ca | 2013-01-31 12:54:47 -0500 | [diff] [blame] | 26 | #include "fid.h" |
Aneesh Kumar K.V | 85ff872 | 2010-09-28 00:27:39 +0530 | [diff] [blame] | 27 | |
| 28 | static struct posix_acl *__v9fs_get_acl(struct p9_fid *fid, char *name) |
| 29 | { |
| 30 | ssize_t size; |
| 31 | void *value = NULL; |
Joe Perches | 009ca38 | 2010-11-15 03:04:51 +0000 | [diff] [blame] | 32 | struct posix_acl *acl = NULL; |
Aneesh Kumar K.V | 85ff872 | 2010-09-28 00:27:39 +0530 | [diff] [blame] | 33 | |
| 34 | size = v9fs_fid_xattr_get(fid, name, NULL, 0); |
| 35 | if (size > 0) { |
| 36 | value = kzalloc(size, GFP_NOFS); |
| 37 | if (!value) |
| 38 | return ERR_PTR(-ENOMEM); |
| 39 | size = v9fs_fid_xattr_get(fid, name, value, size); |
| 40 | if (size > 0) { |
Eric W. Biederman | 5f3a4a2 | 2012-09-10 20:17:44 -0700 | [diff] [blame] | 41 | acl = posix_acl_from_xattr(&init_user_ns, value, size); |
Aneesh Kumar K.V | 85ff872 | 2010-09-28 00:27:39 +0530 | [diff] [blame] | 42 | if (IS_ERR(acl)) |
| 43 | goto err_out; |
| 44 | } |
| 45 | } else if (size == -ENODATA || size == 0 || |
| 46 | size == -ENOSYS || size == -EOPNOTSUPP) { |
| 47 | acl = NULL; |
| 48 | } else |
| 49 | acl = ERR_PTR(-EIO); |
| 50 | |
| 51 | err_out: |
| 52 | kfree(value); |
| 53 | return acl; |
| 54 | } |
| 55 | |
| 56 | int v9fs_get_acl(struct inode *inode, struct p9_fid *fid) |
| 57 | { |
| 58 | int retval = 0; |
| 59 | struct posix_acl *pacl, *dacl; |
Aneesh Kumar K.V | 76381a4 | 2010-09-28 00:27:41 +0530 | [diff] [blame] | 60 | struct v9fs_session_info *v9ses; |
Aneesh Kumar K.V | 85ff872 | 2010-09-28 00:27:39 +0530 | [diff] [blame] | 61 | |
Aneesh Kumar K.V | 76381a4 | 2010-09-28 00:27:41 +0530 | [diff] [blame] | 62 | v9ses = v9fs_inode2v9ses(inode); |
Venkateswararao Jujjuri (JV) | e782ef7 | 2011-01-25 15:40:54 -0800 | [diff] [blame] | 63 | if (((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT) || |
| 64 | ((v9ses->flags & V9FS_ACL_MASK) != V9FS_POSIX_ACL)) { |
Aneesh Kumar K.V | 76381a4 | 2010-09-28 00:27:41 +0530 | [diff] [blame] | 65 | set_cached_acl(inode, ACL_TYPE_DEFAULT, NULL); |
| 66 | set_cached_acl(inode, ACL_TYPE_ACCESS, NULL); |
| 67 | return 0; |
| 68 | } |
Aneesh Kumar K.V | 85ff872 | 2010-09-28 00:27:39 +0530 | [diff] [blame] | 69 | /* get the default/access acl values and cache them */ |
| 70 | dacl = __v9fs_get_acl(fid, POSIX_ACL_XATTR_DEFAULT); |
| 71 | pacl = __v9fs_get_acl(fid, POSIX_ACL_XATTR_ACCESS); |
| 72 | |
| 73 | if (!IS_ERR(dacl) && !IS_ERR(pacl)) { |
| 74 | set_cached_acl(inode, ACL_TYPE_DEFAULT, dacl); |
| 75 | set_cached_acl(inode, ACL_TYPE_ACCESS, pacl); |
Aneesh Kumar K.V | 85ff872 | 2010-09-28 00:27:39 +0530 | [diff] [blame] | 76 | } else |
| 77 | retval = -EIO; |
| 78 | |
Venkateswararao Jujjuri (JV) | c61fa0d | 2011-01-13 15:28:39 -0800 | [diff] [blame] | 79 | if (!IS_ERR(dacl)) |
| 80 | posix_acl_release(dacl); |
| 81 | |
| 82 | if (!IS_ERR(pacl)) |
| 83 | posix_acl_release(pacl); |
| 84 | |
Aneesh Kumar K.V | 85ff872 | 2010-09-28 00:27:39 +0530 | [diff] [blame] | 85 | return retval; |
| 86 | } |
| 87 | |
| 88 | static struct posix_acl *v9fs_get_cached_acl(struct inode *inode, int type) |
| 89 | { |
| 90 | struct posix_acl *acl; |
| 91 | /* |
| 92 | * 9p Always cache the acl value when |
| 93 | * instantiating the inode (v9fs_inode_from_fid) |
| 94 | */ |
| 95 | acl = get_cached_acl(inode, type); |
| 96 | BUG_ON(acl == ACL_NOT_CACHED); |
| 97 | return acl; |
| 98 | } |
| 99 | |
Christoph Hellwig | 4e34e71 | 2011-07-23 17:37:31 +0200 | [diff] [blame] | 100 | struct posix_acl *v9fs_iop_get_acl(struct inode *inode, int type) |
Aneesh Kumar K.V | 85ff872 | 2010-09-28 00:27:39 +0530 | [diff] [blame] | 101 | { |
Aneesh Kumar K.V | 76381a4 | 2010-09-28 00:27:41 +0530 | [diff] [blame] | 102 | struct v9fs_session_info *v9ses; |
| 103 | |
| 104 | v9ses = v9fs_inode2v9ses(inode); |
Venkateswararao Jujjuri (JV) | e782ef7 | 2011-01-25 15:40:54 -0800 | [diff] [blame] | 105 | if (((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT) || |
| 106 | ((v9ses->flags & V9FS_ACL_MASK) != V9FS_POSIX_ACL)) { |
Aneesh Kumar K.V | 76381a4 | 2010-09-28 00:27:41 +0530 | [diff] [blame] | 107 | /* |
Venkateswararao Jujjuri (JV) | e782ef7 | 2011-01-25 15:40:54 -0800 | [diff] [blame] | 108 | * On access = client and acl = on mode get the acl |
Aneesh Kumar K.V | 76381a4 | 2010-09-28 00:27:41 +0530 | [diff] [blame] | 109 | * values from the server |
| 110 | */ |
Christoph Hellwig | 4e34e71 | 2011-07-23 17:37:31 +0200 | [diff] [blame] | 111 | return NULL; |
Aneesh Kumar K.V | 76381a4 | 2010-09-28 00:27:41 +0530 | [diff] [blame] | 112 | } |
Christoph Hellwig | 4e34e71 | 2011-07-23 17:37:31 +0200 | [diff] [blame] | 113 | return v9fs_get_cached_acl(inode, type); |
Aneesh Kumar K.V | 85ff872 | 2010-09-28 00:27:39 +0530 | [diff] [blame] | 114 | |
Aneesh Kumar K.V | 85ff872 | 2010-09-28 00:27:39 +0530 | [diff] [blame] | 115 | } |
Aneesh Kumar K.V | 7a4566b | 2010-09-28 00:27:39 +0530 | [diff] [blame] | 116 | |
Al Viro | 0f235ca | 2013-01-31 12:54:47 -0500 | [diff] [blame] | 117 | static int v9fs_set_acl(struct p9_fid *fid, int type, struct posix_acl *acl) |
Aneesh Kumar K.V | 6e8dc55 | 2010-09-28 00:27:40 +0530 | [diff] [blame] | 118 | { |
| 119 | int retval; |
| 120 | char *name; |
| 121 | size_t size; |
| 122 | void *buffer; |
Venkateswararao Jujjuri (JV) | d344b0f | 2011-01-13 16:33:00 -0800 | [diff] [blame] | 123 | if (!acl) |
| 124 | return 0; |
| 125 | |
Aneesh Kumar K.V | 6e8dc55 | 2010-09-28 00:27:40 +0530 | [diff] [blame] | 126 | /* Set a setxattr request to server */ |
| 127 | size = posix_acl_xattr_size(acl->a_count); |
| 128 | buffer = kmalloc(size, GFP_KERNEL); |
| 129 | if (!buffer) |
| 130 | return -ENOMEM; |
Eric W. Biederman | 5f3a4a2 | 2012-09-10 20:17:44 -0700 | [diff] [blame] | 131 | retval = posix_acl_to_xattr(&init_user_ns, acl, buffer, size); |
Aneesh Kumar K.V | 6e8dc55 | 2010-09-28 00:27:40 +0530 | [diff] [blame] | 132 | if (retval < 0) |
| 133 | goto err_free_out; |
| 134 | switch (type) { |
| 135 | case ACL_TYPE_ACCESS: |
| 136 | name = POSIX_ACL_XATTR_ACCESS; |
| 137 | break; |
| 138 | case ACL_TYPE_DEFAULT: |
| 139 | name = POSIX_ACL_XATTR_DEFAULT; |
| 140 | break; |
| 141 | default: |
| 142 | BUG(); |
| 143 | } |
Al Viro | 0f235ca | 2013-01-31 12:54:47 -0500 | [diff] [blame] | 144 | retval = v9fs_fid_xattr_set(fid, name, buffer, size, 0); |
Aneesh Kumar K.V | 6e8dc55 | 2010-09-28 00:27:40 +0530 | [diff] [blame] | 145 | err_free_out: |
| 146 | kfree(buffer); |
| 147 | return retval; |
| 148 | } |
| 149 | |
Al Viro | be308f0 | 2013-01-31 12:58:16 -0500 | [diff] [blame] | 150 | int v9fs_acl_chmod(struct inode *inode, struct p9_fid *fid) |
Aneesh Kumar K.V | 6e8dc55 | 2010-09-28 00:27:40 +0530 | [diff] [blame] | 151 | { |
| 152 | int retval = 0; |
Al Viro | bc26ab5 | 2011-07-23 00:18:02 -0400 | [diff] [blame] | 153 | struct posix_acl *acl; |
Aneesh Kumar K.V | 6e8dc55 | 2010-09-28 00:27:40 +0530 | [diff] [blame] | 154 | |
| 155 | if (S_ISLNK(inode->i_mode)) |
| 156 | return -EOPNOTSUPP; |
| 157 | acl = v9fs_get_cached_acl(inode, ACL_TYPE_ACCESS); |
| 158 | if (acl) { |
Al Viro | bc26ab5 | 2011-07-23 00:18:02 -0400 | [diff] [blame] | 159 | retval = posix_acl_chmod(&acl, GFP_KERNEL, inode->i_mode); |
| 160 | if (retval) |
| 161 | return retval; |
Al Viro | 7f165aa | 2013-01-31 12:46:55 -0500 | [diff] [blame] | 162 | set_cached_acl(inode, ACL_TYPE_ACCESS, acl); |
Al Viro | 0f235ca | 2013-01-31 12:54:47 -0500 | [diff] [blame] | 163 | retval = v9fs_set_acl(fid, ACL_TYPE_ACCESS, acl); |
Aneesh Kumar K.V | 6e8dc55 | 2010-09-28 00:27:40 +0530 | [diff] [blame] | 164 | posix_acl_release(acl); |
Aneesh Kumar K.V | 6e8dc55 | 2010-09-28 00:27:40 +0530 | [diff] [blame] | 165 | } |
| 166 | return retval; |
| 167 | } |
| 168 | |
Al Viro | 3592ac4 | 2013-01-31 13:45:39 -0500 | [diff] [blame^] | 169 | int v9fs_set_create_acl(struct inode *inode, struct p9_fid *fid, |
Al Viro | 5fa6300 | 2013-01-31 13:31:23 -0500 | [diff] [blame] | 170 | struct posix_acl *dacl, struct posix_acl *acl) |
Aneesh Kumar K.V | ad77dbc | 2010-09-28 00:27:40 +0530 | [diff] [blame] | 171 | { |
Al Viro | 3592ac4 | 2013-01-31 13:45:39 -0500 | [diff] [blame^] | 172 | set_cached_acl(inode, ACL_TYPE_DEFAULT, dacl); |
| 173 | set_cached_acl(inode, ACL_TYPE_ACCESS, acl); |
| 174 | v9fs_set_acl(fid, ACL_TYPE_DEFAULT, dacl); |
| 175 | v9fs_set_acl(fid, ACL_TYPE_ACCESS, acl); |
Aneesh Kumar K.V | ad77dbc | 2010-09-28 00:27:40 +0530 | [diff] [blame] | 176 | return 0; |
| 177 | } |
| 178 | |
Al Viro | 5fa6300 | 2013-01-31 13:31:23 -0500 | [diff] [blame] | 179 | void v9fs_put_acl(struct posix_acl *dacl, |
| 180 | struct posix_acl *acl) |
| 181 | { |
| 182 | posix_acl_release(dacl); |
| 183 | posix_acl_release(acl); |
| 184 | } |
| 185 | |
Al Viro | d3fb612 | 2011-07-23 18:37:50 -0400 | [diff] [blame] | 186 | int v9fs_acl_mode(struct inode *dir, umode_t *modep, |
Aneesh Kumar K.V | ad77dbc | 2010-09-28 00:27:40 +0530 | [diff] [blame] | 187 | struct posix_acl **dpacl, struct posix_acl **pacl) |
| 188 | { |
| 189 | int retval = 0; |
Al Viro | d3fb612 | 2011-07-23 18:37:50 -0400 | [diff] [blame] | 190 | umode_t mode = *modep; |
Aneesh Kumar K.V | ad77dbc | 2010-09-28 00:27:40 +0530 | [diff] [blame] | 191 | struct posix_acl *acl = NULL; |
| 192 | |
| 193 | if (!S_ISLNK(mode)) { |
| 194 | acl = v9fs_get_cached_acl(dir, ACL_TYPE_DEFAULT); |
| 195 | if (IS_ERR(acl)) |
| 196 | return PTR_ERR(acl); |
| 197 | if (!acl) |
| 198 | mode &= ~current_umask(); |
| 199 | } |
| 200 | if (acl) { |
Aneesh Kumar K.V | ad77dbc | 2010-09-28 00:27:40 +0530 | [diff] [blame] | 201 | if (S_ISDIR(mode)) |
Al Viro | 1ec95bf | 2011-07-23 02:28:13 -0400 | [diff] [blame] | 202 | *dpacl = posix_acl_dup(acl); |
Al Viro | 826cae2 | 2011-07-23 03:10:32 -0400 | [diff] [blame] | 203 | retval = posix_acl_create(&acl, GFP_NOFS, &mode); |
| 204 | if (retval < 0) |
| 205 | return retval; |
Aneesh Kumar K.V | ad77dbc | 2010-09-28 00:27:40 +0530 | [diff] [blame] | 206 | if (retval > 0) |
Al Viro | 826cae2 | 2011-07-23 03:10:32 -0400 | [diff] [blame] | 207 | *pacl = acl; |
Al Viro | 1ec95bf | 2011-07-23 02:28:13 -0400 | [diff] [blame] | 208 | else |
Al Viro | 826cae2 | 2011-07-23 03:10:32 -0400 | [diff] [blame] | 209 | posix_acl_release(acl); |
Aneesh Kumar K.V | ad77dbc | 2010-09-28 00:27:40 +0530 | [diff] [blame] | 210 | } |
| 211 | *modep = mode; |
| 212 | return 0; |
Aneesh Kumar K.V | ad77dbc | 2010-09-28 00:27:40 +0530 | [diff] [blame] | 213 | } |
| 214 | |
Aneesh Kumar K.V | 76381a4 | 2010-09-28 00:27:41 +0530 | [diff] [blame] | 215 | static int v9fs_remote_get_acl(struct dentry *dentry, const char *name, |
| 216 | void *buffer, size_t size, int type) |
| 217 | { |
| 218 | char *full_name; |
| 219 | |
| 220 | switch (type) { |
| 221 | case ACL_TYPE_ACCESS: |
| 222 | full_name = POSIX_ACL_XATTR_ACCESS; |
| 223 | break; |
| 224 | case ACL_TYPE_DEFAULT: |
| 225 | full_name = POSIX_ACL_XATTR_DEFAULT; |
| 226 | break; |
| 227 | default: |
| 228 | BUG(); |
| 229 | } |
| 230 | return v9fs_xattr_get(dentry, full_name, buffer, size); |
| 231 | } |
| 232 | |
Aneesh Kumar K.V | 7a4566b | 2010-09-28 00:27:39 +0530 | [diff] [blame] | 233 | static int v9fs_xattr_get_acl(struct dentry *dentry, const char *name, |
| 234 | void *buffer, size_t size, int type) |
| 235 | { |
Aneesh Kumar K.V | 76381a4 | 2010-09-28 00:27:41 +0530 | [diff] [blame] | 236 | struct v9fs_session_info *v9ses; |
Aneesh Kumar K.V | 7a4566b | 2010-09-28 00:27:39 +0530 | [diff] [blame] | 237 | struct posix_acl *acl; |
| 238 | int error; |
| 239 | |
| 240 | if (strcmp(name, "") != 0) |
| 241 | return -EINVAL; |
| 242 | |
Aneesh Kumar K.V | 42869c8 | 2011-03-08 16:39:50 +0530 | [diff] [blame] | 243 | v9ses = v9fs_dentry2v9ses(dentry); |
Aneesh Kumar K.V | 76381a4 | 2010-09-28 00:27:41 +0530 | [diff] [blame] | 244 | /* |
| 245 | * We allow set/get/list of acl when access=client is not specified |
| 246 | */ |
| 247 | if ((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT) |
| 248 | return v9fs_remote_get_acl(dentry, name, buffer, size, type); |
| 249 | |
Aneesh Kumar K.V | 7a4566b | 2010-09-28 00:27:39 +0530 | [diff] [blame] | 250 | acl = v9fs_get_cached_acl(dentry->d_inode, type); |
| 251 | if (IS_ERR(acl)) |
| 252 | return PTR_ERR(acl); |
| 253 | if (acl == NULL) |
| 254 | return -ENODATA; |
Eric W. Biederman | 5f3a4a2 | 2012-09-10 20:17:44 -0700 | [diff] [blame] | 255 | error = posix_acl_to_xattr(&init_user_ns, acl, buffer, size); |
Aneesh Kumar K.V | 7a4566b | 2010-09-28 00:27:39 +0530 | [diff] [blame] | 256 | posix_acl_release(acl); |
| 257 | |
| 258 | return error; |
| 259 | } |
| 260 | |
Aneesh Kumar K.V | 76381a4 | 2010-09-28 00:27:41 +0530 | [diff] [blame] | 261 | static int v9fs_remote_set_acl(struct dentry *dentry, const char *name, |
| 262 | const void *value, size_t size, |
| 263 | int flags, int type) |
| 264 | { |
| 265 | char *full_name; |
| 266 | |
| 267 | switch (type) { |
| 268 | case ACL_TYPE_ACCESS: |
| 269 | full_name = POSIX_ACL_XATTR_ACCESS; |
| 270 | break; |
| 271 | case ACL_TYPE_DEFAULT: |
| 272 | full_name = POSIX_ACL_XATTR_DEFAULT; |
| 273 | break; |
| 274 | default: |
| 275 | BUG(); |
| 276 | } |
| 277 | return v9fs_xattr_set(dentry, full_name, value, size, flags); |
| 278 | } |
| 279 | |
| 280 | |
Aneesh Kumar K.V | 7a4566b | 2010-09-28 00:27:39 +0530 | [diff] [blame] | 281 | static int v9fs_xattr_set_acl(struct dentry *dentry, const char *name, |
| 282 | const void *value, size_t size, |
| 283 | int flags, int type) |
| 284 | { |
Aneesh Kumar K.V | 22d8dcd | 2010-09-28 00:27:40 +0530 | [diff] [blame] | 285 | int retval; |
| 286 | struct posix_acl *acl; |
Aneesh Kumar K.V | 76381a4 | 2010-09-28 00:27:41 +0530 | [diff] [blame] | 287 | struct v9fs_session_info *v9ses; |
Aneesh Kumar K.V | 22d8dcd | 2010-09-28 00:27:40 +0530 | [diff] [blame] | 288 | struct inode *inode = dentry->d_inode; |
| 289 | |
| 290 | if (strcmp(name, "") != 0) |
| 291 | return -EINVAL; |
Aneesh Kumar K.V | 76381a4 | 2010-09-28 00:27:41 +0530 | [diff] [blame] | 292 | |
Aneesh Kumar K.V | 42869c8 | 2011-03-08 16:39:50 +0530 | [diff] [blame] | 293 | v9ses = v9fs_dentry2v9ses(dentry); |
Aneesh Kumar K.V | 76381a4 | 2010-09-28 00:27:41 +0530 | [diff] [blame] | 294 | /* |
| 295 | * set the attribute on the remote. Without even looking at the |
| 296 | * xattr value. We leave it to the server to validate |
| 297 | */ |
| 298 | if ((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT) |
| 299 | return v9fs_remote_set_acl(dentry, name, |
| 300 | value, size, flags, type); |
| 301 | |
Aneesh Kumar K.V | 22d8dcd | 2010-09-28 00:27:40 +0530 | [diff] [blame] | 302 | if (S_ISLNK(inode->i_mode)) |
| 303 | return -EOPNOTSUPP; |
Serge E. Hallyn | 2e14967 | 2011-03-23 16:43:26 -0700 | [diff] [blame] | 304 | if (!inode_owner_or_capable(inode)) |
Aneesh Kumar K.V | 22d8dcd | 2010-09-28 00:27:40 +0530 | [diff] [blame] | 305 | return -EPERM; |
| 306 | if (value) { |
| 307 | /* update the cached acl value */ |
Eric W. Biederman | 5f3a4a2 | 2012-09-10 20:17:44 -0700 | [diff] [blame] | 308 | acl = posix_acl_from_xattr(&init_user_ns, value, size); |
Aneesh Kumar K.V | 22d8dcd | 2010-09-28 00:27:40 +0530 | [diff] [blame] | 309 | if (IS_ERR(acl)) |
| 310 | return PTR_ERR(acl); |
| 311 | else if (acl) { |
| 312 | retval = posix_acl_valid(acl); |
| 313 | if (retval) |
| 314 | goto err_out; |
| 315 | } |
| 316 | } else |
| 317 | acl = NULL; |
| 318 | |
| 319 | switch (type) { |
| 320 | case ACL_TYPE_ACCESS: |
| 321 | name = POSIX_ACL_XATTR_ACCESS; |
| 322 | if (acl) { |
Al Viro | d695212 | 2011-07-23 18:56:36 -0400 | [diff] [blame] | 323 | umode_t mode = inode->i_mode; |
Aneesh Kumar K.V | 22d8dcd | 2010-09-28 00:27:40 +0530 | [diff] [blame] | 324 | retval = posix_acl_equiv_mode(acl, &mode); |
| 325 | if (retval < 0) |
| 326 | goto err_out; |
| 327 | else { |
| 328 | struct iattr iattr; |
| 329 | if (retval == 0) { |
| 330 | /* |
| 331 | * ACL can be represented |
| 332 | * by the mode bits. So don't |
| 333 | * update ACL. |
| 334 | */ |
| 335 | acl = NULL; |
| 336 | value = NULL; |
| 337 | size = 0; |
| 338 | } |
| 339 | /* Updte the mode bits */ |
| 340 | iattr.ia_mode = ((mode & S_IALLUGO) | |
| 341 | (inode->i_mode & ~S_IALLUGO)); |
| 342 | iattr.ia_valid = ATTR_MODE; |
| 343 | /* FIXME should we update ctime ? |
| 344 | * What is the following setxattr update the |
| 345 | * mode ? |
| 346 | */ |
| 347 | v9fs_vfs_setattr_dotl(dentry, &iattr); |
| 348 | } |
| 349 | } |
| 350 | break; |
| 351 | case ACL_TYPE_DEFAULT: |
| 352 | name = POSIX_ACL_XATTR_DEFAULT; |
| 353 | if (!S_ISDIR(inode->i_mode)) { |
Aneesh Kumar K.V | 6f81c11 | 2010-12-10 12:19:31 +0530 | [diff] [blame] | 354 | retval = acl ? -EINVAL : 0; |
Aneesh Kumar K.V | 22d8dcd | 2010-09-28 00:27:40 +0530 | [diff] [blame] | 355 | goto err_out; |
| 356 | } |
| 357 | break; |
| 358 | default: |
| 359 | BUG(); |
| 360 | } |
| 361 | retval = v9fs_xattr_set(dentry, name, value, size, flags); |
| 362 | if (!retval) |
| 363 | set_cached_acl(inode, type, acl); |
| 364 | err_out: |
| 365 | posix_acl_release(acl); |
| 366 | return retval; |
Aneesh Kumar K.V | 7a4566b | 2010-09-28 00:27:39 +0530 | [diff] [blame] | 367 | } |
| 368 | |
| 369 | const struct xattr_handler v9fs_xattr_acl_access_handler = { |
| 370 | .prefix = POSIX_ACL_XATTR_ACCESS, |
| 371 | .flags = ACL_TYPE_ACCESS, |
| 372 | .get = v9fs_xattr_get_acl, |
| 373 | .set = v9fs_xattr_set_acl, |
| 374 | }; |
| 375 | |
| 376 | const struct xattr_handler v9fs_xattr_acl_default_handler = { |
| 377 | .prefix = POSIX_ACL_XATTR_DEFAULT, |
| 378 | .flags = ACL_TYPE_DEFAULT, |
| 379 | .get = v9fs_xattr_get_acl, |
| 380 | .set = v9fs_xattr_set_acl, |
| 381 | }; |