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Diffstat (limited to 'fs/nfs/callback.h')
-rw-r--r--fs/nfs/callback.h68
1 files changed, 61 insertions, 7 deletions
diff --git a/fs/nfs/callback.h b/fs/nfs/callback.h
index e110e286a26..07baa8254ca 100644
--- a/fs/nfs/callback.h
+++ b/fs/nfs/callback.h
@@ -20,13 +20,24 @@ enum nfs4_callback_procnum {
enum nfs4_callback_opnum {
OP_CB_GETATTR = 3,
OP_CB_RECALL = 4,
+/* Callback operations new to NFSv4.1 */
+ OP_CB_LAYOUTRECALL = 5,
+ OP_CB_NOTIFY = 6,
+ OP_CB_PUSH_DELEG = 7,
+ OP_CB_RECALL_ANY = 8,
+ OP_CB_RECALLABLE_OBJ_AVAIL = 9,
+ OP_CB_RECALL_SLOT = 10,
+ OP_CB_SEQUENCE = 11,
+ OP_CB_WANTS_CANCELLED = 12,
+ OP_CB_NOTIFY_LOCK = 13,
+ OP_CB_NOTIFY_DEVICEID = 14,
OP_CB_ILLEGAL = 10044,
};
struct cb_compound_hdr_arg {
unsigned int taglen;
const char *tag;
- unsigned int callback_ident;
+ unsigned int minorversion;
unsigned nops;
};
@@ -59,16 +70,59 @@ struct cb_recallargs {
uint32_t truncate;
};
+#if defined(CONFIG_NFS_V4_1)
+
+struct referring_call {
+ uint32_t rc_sequenceid;
+ uint32_t rc_slotid;
+};
+
+struct referring_call_list {
+ struct nfs4_sessionid rcl_sessionid;
+ uint32_t rcl_nrefcalls;
+ struct referring_call *rcl_refcalls;
+};
+
+struct cb_sequenceargs {
+ struct sockaddr *csa_addr;
+ struct nfs4_sessionid csa_sessionid;
+ uint32_t csa_sequenceid;
+ uint32_t csa_slotid;
+ uint32_t csa_highestslotid;
+ uint32_t csa_cachethis;
+ uint32_t csa_nrclists;
+ struct referring_call_list *csa_rclists;
+};
+
+struct cb_sequenceres {
+ __be32 csr_status;
+ struct nfs4_sessionid csr_sessionid;
+ uint32_t csr_sequenceid;
+ uint32_t csr_slotid;
+ uint32_t csr_highestslotid;
+ uint32_t csr_target_highestslotid;
+};
+
+extern unsigned nfs4_callback_sequence(struct cb_sequenceargs *args,
+ struct cb_sequenceres *res);
+
+#endif /* CONFIG_NFS_V4_1 */
+
extern __be32 nfs4_callback_getattr(struct cb_getattrargs *args, struct cb_getattrres *res);
extern __be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy);
#ifdef CONFIG_NFS_V4
-extern int nfs_callback_up(void);
-extern void nfs_callback_down(void);
-#else
-#define nfs_callback_up() (0)
-#define nfs_callback_down() do {} while(0)
-#endif
+extern int nfs_callback_up(u32 minorversion, struct rpc_xprt *xprt);
+extern void nfs_callback_down(int minorversion);
+#endif /* CONFIG_NFS_V4 */
+
+/*
+ * nfs41: Callbacks are expected to not cause substantial latency,
+ * so we limit their concurrency to 1 by setting up the maximum number
+ * of slots for the backchannel.
+ */
+#define NFS41_BC_MIN_CALLBACKS 1
+#define NFS41_BC_MAX_CALLBACKS 1
extern unsigned int nfs_callback_set_tcpport;
extern unsigned short nfs_callback_tcpport;