Signed-off-by: Benny Halevy <bhalevy@xxxxxxxxxxx>
---
fs/nfs/callback_xdr.c | 191 ++++++++++++++++++++++++++++++++++++++++++++++++-
1 files changed, 189 insertions(+), 2 deletions(-)
diff --git a/fs/nfs/callback_xdr.c b/fs/nfs/callback_xdr.c
index 9db88ce..7b96b09 100644
--- a/fs/nfs/callback_xdr.c
+++ b/fs/nfs/callback_xdr.c
@@ -20,8 +20,28 @@
2 + 2 + 3 + 3)
#define CB_OP_RECALL_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ)
+#if defined(CONFIG_NFS_V4_1)
+#define CB_OP_SEQUENCE_RES_MAXSZ (CB_OP_HDR_RES_MAXSZ + \
+ 4 + 1 + 3)
+#endif /* CONFIG_NFS_V4_1 */
+
#define NFSDBG_FACILITY NFSDBG_CALLBACK
+#define READ64(x) do { \
+ (x) = (u64)ntohl(*p++) << 32; \
+ (x) |= ntohl(*p++); \
+} while (0)
+
+#define READMEM(x,nbytes) do { \
+ x = (char *)p; \
+ p += XDR_QUADLEN(nbytes); \
+} while (0)
+
+#define COPYMEM(x,nbytes) do { \
+ memcpy((x), p, nbytes); \
+ p += XDR_QUADLEN(nbytes); \
+} while (0)
+
typedef __be32 (*callback_process_op_t)(void *, void *);
typedef __be32 (*callback_decode_arg_t)(struct svc_rqst *, struct xdr_stream *, void *);
typedef __be32 (*callback_encode_res_t)(struct svc_rqst *, struct xdr_stream *, void *);
@@ -210,6 +230,122 @@ out:
return status;
}
+#if defined(CONFIG_NFS_V4_1)
+
+static unsigned decode_sessionid(struct xdr_stream *xdr,
+ nfs41_sessionid *sid)
+{
+ uint32_t *p;
+ int len = 16;
+
+ p = read_buf(xdr, len);
+ if (unlikely(p == NULL))
+ return htonl(NFS4ERR_RESOURCE);;
+
+ memcpy(sid, p, len);
+ return 0;
+}
+
+static unsigned decode_rc_list(struct xdr_stream *xdr,
+ struct referring_call_list *rc_list)
+{
+ uint32_t *p;
+ int i;
+ unsigned status;
+
+ status = decode_sessionid(xdr, &rc_list->rcl_sessionid);
+ if (status)
+ goto out;
+
+ status = htonl(NFS4ERR_RESOURCE);
+ p = read_buf(xdr, sizeof(uint32_t));
+ if (unlikely(p == NULL))
+ goto out;
+
+ rc_list->rcl_nrefcalls = ntohl(*p++);
+ if (rc_list->rcl_nrefcalls) {
+ p = read_buf(xdr,
+ rc_list->rcl_nrefcalls * 2 * sizeof(uint32_t));
+ if (unlikely(p == NULL))
+ goto out;
+ rc_list->rcl_refcalls = kmalloc(rc_list->rcl_nrefcalls *
+ sizeof(*rc_list->rcl_refcalls),
+ GFP_KERNEL);
+ if (unlikely(rc_list->rcl_refcalls == NULL))
+ goto out;
+ for (i = 0; i < rc_list->rcl_nrefcalls; i++) {
+ rc_list->rcl_refcalls[i].rc_sequenceid = ntohl(*p++);
+ rc_list->rcl_refcalls[i].rc_slotid = ntohl(*p++);
+ }
+ }
+ status = 0;
+
+out:
+ return status;
+}
+
+static unsigned decode_cb_sequence_args(struct svc_rqst *rqstp,
+ struct xdr_stream *xdr,
+ struct cb_sequenceargs *args)
+{
+ uint32_t *p;
+ int i;
+ unsigned 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_in(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;
+}
+
+#endif /* CONFIG_NFS_V4_1 */
+
static __be32 encode_string(struct xdr_stream *xdr, unsigned int len, const char *str)
{
__be32 *p;
@@ -359,6 +495,49 @@ out:
return status;
}
+#if defined(CONFIG_NFS_V4_1)
+
+static unsigned encode_sessionid(struct xdr_stream *xdr,
+ const nfs41_sessionid *sid)
+{
+ uint32_t *p;
+ int len = 4 * sizeof(uint32_t);
+
+ p = xdr_reserve_space(xdr, len);
+ if (unlikely(p == NULL))
+ return htonl(NFS4ERR_RESOURCE);
+
+ memcpy(p, sid, len);
+ return 0;
+}
+
+static unsigned encode_cb_sequence_res(struct svc_rqst *rqstp,
+ struct xdr_stream *xdr,
+ const struct cb_sequenceres *res)
+{
+ uint32_t *p;
+ unsigned status = res->csr_status;
+
+ if (unlikely(status != 0))
+ goto out;
+
+ encode_sessionid(xdr, &res->csr_sessionid);
+
+ p = xdr_reserve_space(xdr, 4 * sizeof(uint32_t));
+ if (unlikely(p == NULL))
+ return htonl(NFS4ERR_RESOURCE);
+
+ *p++ = htonl(res->csr_sequenceid);
+ *p++ = htonl(res->csr_slotid);
+ *p++ = htonl(res->csr_highestslotid);
+ *p++ = htonl(res->csr_target_highestslotid);
+out:
+ dprintk("%s: exit with status = %d\n", __func__, ntohl(status));
+ return status;
+}
+
+#endif /* CONFIG_NFS_V4_1 */
+
static __be32 process_op(uint32_t minorversion, int nop,
struct svc_rqst *rqstp,
struct xdr_stream *xdr_in, void *argp,
@@ -382,6 +561,7 @@ static __be32 process_op(uint32_t minorversion, int nop,
switch (op_nr) {
case OP_CB_GETATTR:
case OP_CB_RECALL:
+ case OP_CB_SEQUENCE:
op = &callback_ops[op_nr];
break;
@@ -391,7 +571,6 @@ static __be32 process_op(uint32_t minorversion, int nop,
case OP_CB_RECALL_ANY:
case OP_CB_RECALLABLE_OBJ_AVAIL:
case OP_CB_RECALL_SLOT:
- case OP_CB_SEQUENCE:
case OP_CB_WANTS_CANCELLED:
case OP_CB_NOTIFY_LOCK:
case OP_CB_NOTIFY_DEVICEID:
@@ -496,7 +675,15 @@ static struct callback_op callback_ops[] = {
.process_op = (callback_process_op_t)nfs4_callback_recall,
.decode_args = (callback_decode_arg_t)decode_recall_args,
.res_maxsize = CB_OP_RECALL_RES_MAXSZ,
- }
+ },
+#if defined(CONFIG_NFS_V4_1)
+ [OP_CB_SEQUENCE] = {
+ .process_op = (callback_process_op_t)nfs4_callback_sequence,
+ .decode_args = (callback_decode_arg_t)decode_cb_sequence_args,
+ .encode_res = (callback_encode_res_t)encode_cb_sequence_res,
+ .res_maxsize = CB_OP_SEQUENCE_RES_MAXSZ,
+ },
+#endif /* CONFIG_NFS_V4_1 */
};
/*
--
1.6.0.2
--
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