static int nfs_callback_authenticate(struct svc_rqst *rqstp)
{
struct nfs_client *clp;
RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]);
int ret = SVC_OK;
/* Don't talk to strangers */
clp = nfs_find_client(svc_addr(rqstp), 4);
if (clp == NULL)
return SVC_DROP;
dprintk("%s: %s NFSv4 callback!\n", __func__,
svc_print_addr(rqstp, buf, sizeof(buf)));
switch (rqstp->rq_authop->flavour) {
case RPC_AUTH_NULL:
if (rqstp->rq_proc != CB_NULL)
ret = SVC_DENIED;
break;
case RPC_AUTH_UNIX:
break;
case RPC_AUTH_GSS:
ret = check_gss_callback_principal(clp, rqstp);
break;
default:
ret = SVC_DENIED;
}
nfs_put_client(clp);
return ret;
}
static __be32 decode_cb_sequence_args(struct svc_rqst *rqstp,
struct xdr_stream *xdr,
struct cb_sequenceargs *args)
{
__be32 *p;
int i;
__be32 status;
status = decode_sessionid(xdr, &args->csa_sessionid);
if (status)
goto out;
status = htonl(NFS4ERR_RESOURCE);
p = read_buf(xdr, 5 * sizeof(uint32_t));
if (unlikely(p == NULL))
goto out;
args->csa_addr = svc_addr(rqstp);
args->csa_sequenceid = ntohl(*p++);
args->csa_slotid = ntohl(*p++);
args->csa_highestslotid = ntohl(*p++);
args->csa_cachethis = ntohl(*p++);
args->csa_nrclists = ntohl(*p++);
args->csa_rclists = NULL;
if (args->csa_nrclists) {
args->csa_rclists = kmalloc(args->csa_nrclists *
sizeof(*args->csa_rclists),
GFP_KERNEL);
if (unlikely(args->csa_rclists == NULL))
goto out;
for (i = 0; i < args->csa_nrclists; i++) {
status = decode_rc_list(xdr, &args->csa_rclists[i]);
if (status)
goto out_free;
}
}
status = 0;
dprintk("%s: sessionid %x:%x:%x:%x sequenceid %u slotid %u "
"highestslotid %u cachethis %d nrclists %u\n",
__func__,
((u32 *)&args->csa_sessionid)[0],
((u32 *)&args->csa_sessionid)[1],
((u32 *)&args->csa_sessionid)[2],
((u32 *)&args->csa_sessionid)[3],
args->csa_sequenceid, args->csa_slotid,
args->csa_highestslotid, args->csa_cachethis,
args->csa_nrclists);
out:
dprintk("%s: exit with status = %d\n", __func__, ntohl(status));
return status;
out_free:
for (i = 0; i < args->csa_nrclists; i++)
kfree(args->csa_rclists[i].rcl_refcalls);
kfree(args->csa_rclists);
goto out;
}
static __be32 decode_layoutrecall_args(struct svc_rqst *rqstp,
struct xdr_stream *xdr,
struct cb_layoutrecallargs *args)
{
__be32 *p;
__be32 status = 0;
uint32_t iomode;
args->cbl_addr = svc_addr(rqstp);
p = read_buf(xdr, 4 * sizeof(uint32_t));
if (unlikely(p == NULL)) {
status = htonl(NFS4ERR_BADXDR);
goto out;
}
args->cbl_layout_type = ntohl(*p++);
/* Depite the spec's xdr, iomode really belongs in the FILE switch,
* as it is unusable and ignored with the other types.
*/
iomode = ntohl(*p++);
args->cbl_layoutchanged = ntohl(*p++);
args->cbl_recall_type = ntohl(*p++);
if (args->cbl_recall_type == RETURN_FILE) {
args->cbl_range.iomode = iomode;
status = decode_fh(xdr, &args->cbl_fh);
if (unlikely(status != 0))
goto out;
p = read_buf(xdr, 2 * sizeof(uint64_t));
if (unlikely(p == NULL)) {
status = htonl(NFS4ERR_BADXDR);
goto out;
}
p = xdr_decode_hyper(p, &args->cbl_range.offset);
p = xdr_decode_hyper(p, &args->cbl_range.length);
status = decode_stateid(xdr, &args->cbl_stateid);
if (unlikely(status != 0))
goto out;
} else if (args->cbl_recall_type == RETURN_FSID) {
p = read_buf(xdr, 2 * sizeof(uint64_t));
if (unlikely(p == NULL)) {
status = htonl(NFS4ERR_BADXDR);
goto out;
}
p = xdr_decode_hyper(p, &args->cbl_fsid.major);
p = xdr_decode_hyper(p, &args->cbl_fsid.minor);
} else if (args->cbl_recall_type != RETURN_ALL) {
status = htonl(NFS4ERR_BADXDR);
goto out;
}
dprintk("%s: ltype 0x%x iomode %d changed %d recall_type %d\n",
__func__,
args->cbl_layout_type, iomode,
args->cbl_layoutchanged, args->cbl_recall_type);
out:
dprintk("%s: exit with status = %d\n", __func__, ntohl(status));
return status;
}
/*
* GRANTED: A server calls us to tell that a process' lock request
* was granted
*/
static __be32
nlmsvc_proc_granted(struct svc_rqst *rqstp, struct nlm_args *argp,
struct nlm_res *resp)
{
resp->cookie = argp->cookie;
dprintk("lockd: GRANTED called\n");
resp->status = nlmclnt_grant(svc_addr(rqstp), &argp->lock);
dprintk("lockd: GRANTED status %d\n", ntohl(resp->status));
return rpc_success;
}
static __be32 decode_recallslot_args(struct svc_rqst *rqstp,
struct xdr_stream *xdr,
struct cb_recallslotargs *args)
{
__be32 *p;
args->crsa_addr = svc_addr(rqstp);
p = read_buf(xdr, 4);
if (unlikely(p == NULL))
return htonl(NFS4ERR_BADXDR);
args->crsa_target_max_slots = ntohl(*p++);
return 0;
}
static __be32 decode_getattr_args(struct svc_rqst *rqstp, struct xdr_stream *xdr, struct cb_getattrargs *args)
{
__be32 status;
status = decode_fh(xdr, &args->fh);
if (unlikely(status != 0))
goto out;
args->addr = svc_addr(rqstp);
status = decode_bitmap(xdr, args->bitmap);
out:
dprintk("%s: exit with status = %d\n", __func__, ntohl(status));
return status;
}
static __be32 decode_cb_sequence_args(struct svc_rqst *rqstp,
struct xdr_stream *xdr,
void *argp)
{
struct cb_sequenceargs *args = argp;
__be32 *p;
int i;
__be32 status;
status = decode_sessionid(xdr, &args->csa_sessionid);
if (status)
return status;
p = read_buf(xdr, 5 * sizeof(uint32_t));
if (unlikely(p == NULL))
return htonl(NFS4ERR_RESOURCE);
args->csa_addr = svc_addr(rqstp);
args->csa_sequenceid = ntohl(*p++);
args->csa_slotid = ntohl(*p++);
args->csa_highestslotid = ntohl(*p++);
args->csa_cachethis = ntohl(*p++);
args->csa_nrclists = ntohl(*p++);
args->csa_rclists = NULL;
if (args->csa_nrclists) {
args->csa_rclists = kmalloc_array(args->csa_nrclists,
sizeof(*args->csa_rclists),
GFP_KERNEL);
if (unlikely(args->csa_rclists == NULL))
return htonl(NFS4ERR_RESOURCE);
for (i = 0; i < args->csa_nrclists; i++) {
status = decode_rc_list(xdr, &args->csa_rclists[i]);
if (status) {
args->csa_nrclists = i;
goto out_free;
}
}
}
return 0;
out_free:
for (i = 0; i < args->csa_nrclists; i++)
kfree(args->csa_rclists[i].rcl_refcalls);
kfree(args->csa_rclists);
return status;
}
static __be32 decode_recallany_args(struct svc_rqst *rqstp,
struct xdr_stream *xdr,
struct cb_recallanyargs *args)
{
__be32 *p;
args->craa_addr = svc_addr(rqstp);
p = read_buf(xdr, 4);
if (unlikely(p == NULL))
return htonl(NFS4ERR_BADXDR);
args->craa_objs_to_keep = ntohl(*p++);
p = read_buf(xdr, 4);
if (unlikely(p == NULL))
return htonl(NFS4ERR_BADXDR);
args->craa_type_mask = ntohl(*p);
return 0;
}
static __be32 decode_recallany_args(struct svc_rqst *rqstp,
struct xdr_stream *xdr,
struct cb_recallanyargs *args)
{
uint32_t bitmap[2];
__be32 *p, status;
args->craa_addr = svc_addr(rqstp);
p = read_buf(xdr, 4);
if (unlikely(p == NULL))
return htonl(NFS4ERR_BADXDR);
args->craa_objs_to_keep = ntohl(*p++);
status = decode_bitmap(xdr, bitmap);
if (unlikely(status))
return status;
args->craa_type_mask = bitmap[0];
return 0;
}
static __be32 decode_recall_args(struct svc_rqst *rqstp, struct xdr_stream *xdr, struct cb_recallargs *args)
{
__be32 *p;
__be32 status;
args->addr = svc_addr(rqstp);
status = decode_stateid(xdr, &args->stateid);
if (unlikely(status != 0))
goto out;
p = read_buf(xdr, 4);
if (unlikely(p == NULL)) {
status = htonl(NFS4ERR_RESOURCE);
goto out;
}
args->truncate = ntohl(*p);
status = decode_fh(xdr, &args->fh);
out:
dprintk("%s: exit with status = %d\n", __func__, ntohl(status));
return status;
}
/**
* svc_print_addr - Format rq_addr field for printing
* @rqstp: svc_rqst struct containing address to print
* @buf: target buffer for formatted address
* @len: length of target buffer
*
*/
char *svc_print_addr(struct svc_rqst *rqstp, char *buf, size_t len)
{
return __svc_print_addr(svc_addr(rqstp), buf, len);
}