struct nfs4_acl *
nfs4_acl_posix_to_nfsv4(struct posix_acl *pacl, struct posix_acl *dpacl,
unsigned int flags)
{
struct nfs4_acl *acl;
int size = 0;
if (pacl) {
if (posix_acl_valid(pacl) < 0)
return ERR_PTR(-EINVAL);
size += 2*pacl->a_count;
}
if (dpacl) {
if (posix_acl_valid(dpacl) < 0)
return ERR_PTR(-EINVAL);
size += 2*dpacl->a_count;
}
/* Allocate for worst case: one (deny, allow) pair each: */
acl = nfs4_acl_new(size);
if (acl == NULL)
return ERR_PTR(-ENOMEM);
if (pacl)
_posix_to_nfsv4_one(pacl, acl, flags & ~NFS4_ACL_TYPE_DEFAULT);
if (dpacl)
_posix_to_nfsv4_one(dpacl, acl, flags | NFS4_ACL_TYPE_DEFAULT);
return acl;
}
int
nfsd4_get_nfs4_acl(struct svc_rqst *rqstp, struct dentry *dentry,
struct nfs4_acl **acl)
{
struct inode *inode = d_inode(dentry);
int error = 0;
struct posix_acl *pacl = NULL, *dpacl = NULL;
unsigned int flags = 0;
int size = 0;
pacl = get_acl(inode, ACL_TYPE_ACCESS);
if (!pacl)
pacl = posix_acl_from_mode(inode->i_mode, GFP_KERNEL);
if (IS_ERR(pacl))
return PTR_ERR(pacl);
/* allocate for worst case: one (deny, allow) pair each: */
size += 2 * pacl->a_count;
if (S_ISDIR(inode->i_mode)) {
flags = NFS4_ACL_DIR;
dpacl = get_acl(inode, ACL_TYPE_DEFAULT);
if (IS_ERR(dpacl)) {
error = PTR_ERR(dpacl);
goto rel_pacl;
}
if (dpacl)
size += 2 * dpacl->a_count;
}
*acl = kmalloc(nfs4_acl_bytes(size), GFP_KERNEL);
if (*acl == NULL) {
error = -ENOMEM;
goto out;
}
(*acl)->naces = 0;
_posix_to_nfsv4_one(pacl, *acl, flags & ~NFS4_ACL_TYPE_DEFAULT);
if (dpacl)
_posix_to_nfsv4_one(dpacl, *acl, flags | NFS4_ACL_TYPE_DEFAULT);
out:
posix_acl_release(dpacl);
rel_pacl:
posix_acl_release(pacl);
return error;
}