3 #include <linux/nfs3.h>
4 #include <linux/nfs_fs.h>
5 #include <linux/xattr_acl.h>
6 #include <linux/nfsacl.h>
8 #define NFSDBG_FACILITY NFSDBG_PROC
10 ssize_t
nfs3_listxattr(struct dentry
*dentry
, char *buffer
, size_t size
)
12 struct inode
*inode
= dentry
->d_inode
;
13 struct posix_acl
*acl
;
16 # define output(s) do { \
17 if (pos + sizeof(s) <= size) { \
18 memcpy(buffer + pos, s, sizeof(s)); \
24 acl
= nfs3_proc_getacl(inode
, ACL_TYPE_ACCESS
);
28 output("system.posix_acl_access");
29 posix_acl_release(acl
);
32 if (S_ISDIR(inode
->i_mode
)) {
33 acl
= nfs3_proc_getacl(inode
, ACL_TYPE_DEFAULT
);
37 output("system.posix_acl_default");
38 posix_acl_release(acl
);
44 if (!buffer
|| len
<= size
)
49 ssize_t
nfs3_getxattr(struct dentry
*dentry
, const char *name
,
50 void *buffer
, size_t size
)
52 struct inode
*inode
= dentry
->d_inode
;
53 struct posix_acl
*acl
;
56 if (strcmp(name
, XATTR_NAME_ACL_ACCESS
) == 0)
57 type
= ACL_TYPE_ACCESS
;
58 else if (strcmp(name
, XATTR_NAME_ACL_DEFAULT
) == 0)
59 type
= ACL_TYPE_DEFAULT
;
63 acl
= nfs3_proc_getacl(inode
, type
);
67 if (type
== ACL_TYPE_ACCESS
&& acl
->a_count
== 0)
70 error
= posix_acl_to_xattr(acl
, buffer
, size
);
71 posix_acl_release(acl
);
78 int nfs3_setxattr(struct dentry
*dentry
, const char *name
,
79 const void *value
, size_t size
, int flags
)
81 struct inode
*inode
= dentry
->d_inode
;
82 struct posix_acl
*acl
;
85 if (strcmp(name
, XATTR_NAME_ACL_ACCESS
) == 0)
86 type
= ACL_TYPE_ACCESS
;
87 else if (strcmp(name
, XATTR_NAME_ACL_DEFAULT
) == 0)
88 type
= ACL_TYPE_DEFAULT
;
92 acl
= posix_acl_from_xattr(value
, size
);
95 error
= nfs3_proc_setacl(inode
, type
, acl
);
96 posix_acl_release(acl
);
101 int nfs3_removexattr(struct dentry
*dentry
, const char *name
)
103 struct inode
*inode
= dentry
->d_inode
;
106 if (strcmp(name
, XATTR_NAME_ACL_ACCESS
) == 0)
107 type
= ACL_TYPE_ACCESS
;
108 else if (strcmp(name
, XATTR_NAME_ACL_DEFAULT
) == 0)
109 type
= ACL_TYPE_DEFAULT
;
113 return nfs3_proc_setacl(inode
, type
, NULL
);
116 struct posix_acl
*nfs3_proc_getacl(struct inode
*inode
, int type
)
118 struct nfs_server
*server
= NFS_SERVER(inode
);
119 struct nfs_fattr fattr
;
120 struct page
*pages
[NFSACL_MAXPAGES
] = { };
121 struct nfs3_getaclargs args
= {
123 /* The xdr layer may allocate pages here. */
126 struct nfs3_getaclres res
= {
129 struct posix_acl
*acl
= NULL
;
132 if (!nfs_server_capable(inode
, NFS_CAP_ACLS
))
133 return ERR_PTR(-EOPNOTSUPP
);
136 case ACL_TYPE_ACCESS
:
137 args
.mask
= NFS_ACLCNT
|NFS_ACL
;
140 case ACL_TYPE_DEFAULT
:
141 if (!S_ISDIR(inode
->i_mode
))
143 args
.mask
= NFS_DFACLCNT
|NFS_DFACL
;
147 return ERR_PTR(-EINVAL
);
150 dprintk("NFS call getacl\n");
151 status
= rpc_call(server
->client_acl
, ACLPROC3_GETACL
,
153 dprintk("NFS reply getacl: %d\n", status
);
155 /* pages may have been allocated at the xdr layer. */
156 for (count
= 0; count
< NFSACL_MAXPAGES
&& args
.pages
[count
]; count
++)
157 __free_page(args
.pages
[count
]);
161 status
= nfs_refresh_inode(inode
, &fattr
);
164 case -EPROTONOSUPPORT
:
165 dprintk("NFS_V3_ACL extension not supported; disabling\n");
166 server
->caps
&= ~NFS_CAP_ACLS
;
168 status
= -EOPNOTSUPP
;
172 if ((args
.mask
& res
.mask
) != args
.mask
) {
177 if (res
.acl_access
!= NULL
) {
178 if (posix_acl_equiv_mode(res
.acl_access
, NULL
) == 0) {
179 posix_acl_release(res
.acl_access
);
180 res
.acl_access
= NULL
;
185 case ACL_TYPE_ACCESS
:
186 acl
= res
.acl_access
;
187 res
.acl_access
= NULL
;
190 case ACL_TYPE_DEFAULT
:
191 acl
= res
.acl_default
;
192 res
.acl_default
= NULL
;
196 posix_acl_release(res
.acl_access
);
197 posix_acl_release(res
.acl_default
);
200 posix_acl_release(acl
);
201 acl
= ERR_PTR(status
);
206 static int nfs3_proc_setacls(struct inode
*inode
, struct posix_acl
*acl
,
207 struct posix_acl
*dfacl
)
209 struct nfs_server
*server
= NFS_SERVER(inode
);
210 struct nfs_fattr fattr
;
211 struct page
*pages
[NFSACL_MAXPAGES
] = { };
212 struct nfs3_setaclargs args
= {
220 status
= -EOPNOTSUPP
;
221 if (!nfs_server_capable(inode
, NFS_CAP_ACLS
))
224 /* We are doing this here, because XDR marshalling can only
227 if (acl
!= NULL
&& acl
->a_count
> NFS_ACL_MAX_ENTRIES
)
229 if (dfacl
!= NULL
&& dfacl
->a_count
> NFS_ACL_MAX_ENTRIES
)
231 if (S_ISDIR(inode
->i_mode
)) {
232 args
.mask
|= NFS_DFACL
;
233 args
.acl_default
= dfacl
;
236 dprintk("NFS call setacl\n");
237 nfs_begin_data_update(inode
);
238 status
= rpc_call(server
->client_acl
, ACLPROC3_SETACL
,
240 NFS_FLAGS(inode
) |= NFS_INO_INVALID_ACCESS
;
241 nfs_end_data_update(inode
);
242 dprintk("NFS reply setacl: %d\n", status
);
244 /* pages may have been allocated at the xdr layer. */
245 for (count
= 0; count
< NFSACL_MAXPAGES
&& args
.pages
[count
]; count
++)
246 __free_page(args
.pages
[count
]);
250 status
= nfs_refresh_inode(inode
, &fattr
);
253 case -EPROTONOSUPPORT
:
254 dprintk("NFS_V3_ACL SETACL RPC not supported"
255 "(will not retry)\n");
256 server
->caps
&= ~NFS_CAP_ACLS
;
258 status
= -EOPNOTSUPP
;
264 int nfs3_proc_setacl(struct inode
*inode
, int type
, struct posix_acl
*acl
)
266 struct posix_acl
*alloc
= NULL
, *dfacl
= NULL
;
269 if (S_ISDIR(inode
->i_mode
)) {
271 case ACL_TYPE_ACCESS
:
272 alloc
= dfacl
= nfs3_proc_getacl(inode
,
278 case ACL_TYPE_DEFAULT
:
280 alloc
= acl
= nfs3_proc_getacl(inode
,
289 } else if (type
!= ACL_TYPE_ACCESS
)
293 alloc
= acl
= posix_acl_from_mode(inode
->i_mode
, GFP_KERNEL
);
297 status
= nfs3_proc_setacls(inode
, acl
, dfacl
);
298 posix_acl_release(alloc
);
302 return PTR_ERR(alloc
);
305 int nfs3_proc_set_default_acl(struct inode
*dir
, struct inode
*inode
,
308 struct posix_acl
*dfacl
, *acl
;
311 dfacl
= nfs3_proc_getacl(dir
, ACL_TYPE_DEFAULT
);
313 error
= PTR_ERR(dfacl
);
314 return (error
== -EOPNOTSUPP
) ? 0 : error
;
318 acl
= posix_acl_clone(dfacl
, GFP_KERNEL
);
321 goto out_release_dfacl
;
322 error
= posix_acl_create_masq(acl
, &mode
);
324 goto out_release_acl
;
325 error
= nfs3_proc_setacls(inode
, acl
, S_ISDIR(inode
->i_mode
) ?
328 posix_acl_release(acl
);
330 posix_acl_release(dfacl
);