STATIC int
linvfs_removexattr(
struct dentry *dentry,
const char *name)
{
int error;
int xflags = 0;
char *p = (char *)name;
struct inode *inode = dentry->d_inode;
vnode_t *vp = LINVFS_GET_VP(inode);
if (strncmp(name, xfs_namespaces[SYSTEM_NAMES].name,
xfs_namespaces[SYSTEM_NAMES].namelen) == 0) {
error = -ENOATTR;
p += xfs_namespaces[SYSTEM_NAMES].namelen;
if (strcmp(p, POSIXACL_ACCESS) == 0)
error = xfs_acl_vremove(vp, _ACL_TYPE_ACCESS);
else if (strcmp(p, POSIXACL_DEFAULT) == 0)
error = xfs_acl_vremove(vp, _ACL_TYPE_DEFAULT);
else if (strcmp(p, POSIXCAP) == 0)
error = xfs_cap_vremove(vp);
return error;
}
if (strncmp(name, xfs_namespaces[ROOT_NAMES].name,
xfs_namespaces[ROOT_NAMES].namelen) == 0) {
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
xflags |= ATTR_ROOT;
p += xfs_namespaces[ROOT_NAMES].namelen;
VOP_ATTR_REMOVE(vp, p, xflags, NULL, error);
return -error;
}
if (strncmp(name, xfs_namespaces[USER_NAMES].name,
xfs_namespaces[USER_NAMES].namelen) == 0) {
p += xfs_namespaces[USER_NAMES].namelen;
if (!capable_user_xattr(inode))
return -EPERM;
VOP_ATTR_REMOVE(vp, p, xflags, NULL, error);
return -error;
}
return -ENOATTR;
}
int
xfs_cap_vremove(
vnode_t *vp)
{
int error;
VN_HOLD(vp);
error = xfs_cap_allow_set(vp);
if (!error) {
VOP_ATTR_REMOVE(vp, SGI_CAP_LINUX, ATTR_ROOT, sys_cred, error);
if (error == ENOATTR)
error = 0; /* 'scool */
}
VN_RELE(vp);
return -error;
}
STATIC int
xfs_attrmulti_attr_remove(
struct vnode *vp,
char *name,
__uint32_t flags)
{
int error;
if (IS_RDONLY(&vp->v_inode))
return -EROFS;
if (IS_IMMUTABLE(&vp->v_inode) || IS_APPEND(&vp->v_inode))
return EPERM;
VOP_ATTR_REMOVE(vp, name, flags, NULL, error);
return error;
}
int
xfs_acl_vremove(
vnode_t *vp,
int kind)
{
int error;
VN_HOLD(vp);
error = xfs_acl_allow_set(vp, kind);
if (!error) {
VOP_ATTR_REMOVE(vp, kind == _ACL_TYPE_DEFAULT?
SGI_ACL_DEFAULT: SGI_ACL_FILE,
ATTR_ROOT, sys_cred, error);
if (error == ENOATTR)
error = 0; /* 'scool */
}
VN_RELE(vp);
return -error;
}
STATIC int
xfs_attrmulti_by_handle(
xfs_mount_t *mp,
unsigned long arg,
struct file *parfilp,
struct inode *parinode)
{
int error;
xfs_attr_multiop_t *ops;
xfs_fsop_attrmulti_handlereq_t am_hreq;
struct inode *inode;
vnode_t *vp;
unsigned int i, size;
error = xfs_vget_fsop_handlereq(mp, parinode, CAP_SYS_ADMIN, arg,
sizeof(xfs_fsop_attrmulti_handlereq_t),
(xfs_fsop_handlereq_t *)&am_hreq,
&vp, &inode);
if (error)
return -error;
size = am_hreq.opcount * sizeof(attr_multiop_t);
if (!size || size > 16 * PAGE_SIZE) {
VN_RELE(vp);
return -XFS_ERROR(E2BIG);
}
ops = (xfs_attr_multiop_t *)kmalloc(size, GFP_KERNEL);
if (!ops) {
VN_RELE(vp);
return -XFS_ERROR(ENOMEM);
}
if (copy_from_user(ops, am_hreq.ops, size)) {
kfree(ops);
VN_RELE(vp);
return -XFS_ERROR(EFAULT);
}
for (i = 0; i < am_hreq.opcount; i++) {
switch(ops[i].am_opcode) {
case ATTR_OP_GET:
VOP_ATTR_GET(vp,ops[i].am_attrname, ops[i].am_attrvalue,
&ops[i].am_length, ops[i].am_flags,
NULL, ops[i].am_error);
break;
case ATTR_OP_SET:
if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) {
ops[i].am_error = EPERM;
break;
}
VOP_ATTR_SET(vp,ops[i].am_attrname, ops[i].am_attrvalue,
ops[i].am_length, ops[i].am_flags,
NULL, ops[i].am_error);
break;
case ATTR_OP_REMOVE:
if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) {
ops[i].am_error = EPERM;
break;
}
VOP_ATTR_REMOVE(vp, ops[i].am_attrname, ops[i].am_flags,
NULL, ops[i].am_error);
break;
default:
ops[i].am_error = EINVAL;
}
}
if (copy_to_user(am_hreq.ops, ops, size))
error = -XFS_ERROR(EFAULT);
kfree(ops);
VN_RELE(vp);
return error;
}
