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);