int ceph_init_acl(struct dentry *dentry, struct inode *inode, struct inode *dir)
{
struct posix_acl *default_acl, *acl;
umode_t new_mode = inode->i_mode;
int error;
error = posix_acl_create(dir, &new_mode, &default_acl, &acl);
if (error)
return error;
if (!default_acl && !acl) {
cache_no_acl(inode);
if (new_mode != inode->i_mode) {
struct iattr newattrs = {
.ia_mode = new_mode,
.ia_valid = ATTR_MODE,
};
error = ceph_setattr(dentry, &newattrs);
}
return error;
}
int ceph_set_acl(struct inode *inode, struct posix_acl *acl, int type)
{
int ret = 0, size = 0;
const char *name = NULL;
char *value = NULL;
struct iattr newattrs;
umode_t new_mode = inode->i_mode, old_mode = inode->i_mode;
struct dentry *dentry;
switch (type) {
case ACL_TYPE_ACCESS:
name = XATTR_NAME_POSIX_ACL_ACCESS;
if (acl) {
ret = posix_acl_equiv_mode(acl, &new_mode);
if (ret < 0)
goto out;
if (ret == 0)
acl = NULL;
}
break;
case ACL_TYPE_DEFAULT:
if (!S_ISDIR(inode->i_mode)) {
ret = acl ? -EINVAL : 0;
goto out;
}
name = XATTR_NAME_POSIX_ACL_DEFAULT;
break;
default:
ret = -EINVAL;
goto out;
}
if (acl) {
size = posix_acl_xattr_size(acl->a_count);
value = kmalloc(size, GFP_NOFS);
if (!value) {
ret = -ENOMEM;
goto out;
}
ret = posix_acl_to_xattr(&init_user_ns, acl, value, size);
if (ret < 0)
goto out_free;
}
dentry = d_find_alias(inode);
if (new_mode != old_mode) {
newattrs.ia_mode = new_mode;
newattrs.ia_valid = ATTR_MODE;
ret = ceph_setattr(dentry, &newattrs);
if (ret)
goto out_dput;
}
ret = __ceph_setxattr(dentry, name, value, size, 0);
if (ret) {
if (new_mode != old_mode) {
newattrs.ia_mode = old_mode;
newattrs.ia_valid = ATTR_MODE;
ceph_setattr(dentry, &newattrs);
}
goto out_dput;
}
ceph_set_cached_acl(inode, type, acl);
out_dput:
dput(dentry);
out_free:
kfree(value);
out:
return ret;
}
