static int gfs2_security_init(struct gfs2_inode *dip, struct gfs2_inode *ip)
{
int err;
size_t len;
void *value;
char *name;
struct gfs2_ea_request er;
err = security_inode_init_security(&ip->i_inode, &dip->i_inode,
&name, &value, &len);
if (err) {
if (err == -EOPNOTSUPP)
return 0;
return err;
}
memset(&er, 0, sizeof(struct gfs2_ea_request));
er.er_type = GFS2_EATYPE_SECURITY;
er.er_name = name;
er.er_data = value;
er.er_name_len = strlen(name);
er.er_data_len = len;
err = gfs2_ea_set_i(ip, &er);
kfree(value);
kfree(name);
return err;
}
static int security_eo_set(struct gfs2_inode *ip, struct gfs2_ea_request *er)
{
struct inode *inode = &ip->i_inode;
int error = permission(inode, MAY_WRITE, NULL);
if (error)
return error;
return gfs2_ea_set_i(ip, er);
}
static int system_eo_set(struct gfs2_inode *ip, struct gfs2_ea_request *er)
{
int remove = 0;
int error;
if (GFS2_ACL_IS_ACCESS(er->er_name, er->er_name_len)) {
if (!(er->er_flags & GFS2_ERF_MODE)) {
er->er_mode = ip->i_inode.i_mode;
er->er_flags |= GFS2_ERF_MODE;
}
error = gfs2_acl_validate_set(ip, 1, er,
&remove, &er->er_mode);
if (error)
return error;
error = gfs2_ea_set_i(ip, er);
if (error)
return error;
if (remove)
gfs2_ea_remove_i(ip, er);
return 0;
} else if (GFS2_ACL_IS_DEFAULT(er->er_name, er->er_name_len)) {
error = gfs2_acl_validate_set(ip, 0, er,
&remove, NULL);
if (error)
return error;
if (!remove)
error = gfs2_ea_set_i(ip, er);
else {
error = gfs2_ea_remove_i(ip, er);
if (error == -ENODATA)
error = 0;
}
return error;
}
return -EPERM;
}
static int user_eo_set(struct gfs2_inode *ip, struct gfs2_ea_request *er)
{
struct inode *inode = &ip->i_inode;
if (S_ISREG(inode->i_mode) ||
(S_ISDIR(inode->i_mode) && !(inode->i_mode & S_ISVTX))) {
int error = permission(inode, MAY_WRITE, NULL);
if (error)
return error;
} else
return -EPERM;
return gfs2_ea_set_i(ip, er);
}
static int user_eo_set(struct gfs2_inode *ip, struct gfs2_ea_request *er)
{
return gfs2_ea_set_i(ip, er);
}