1 /* 2 * linux/fs/nfs/callback.h 3 * 4 * Copyright (C) 2004 Trond Myklebust 5 * 6 * NFSv4 callback definitions 7 */ 8 #ifndef __LINUX_FS_NFS_CALLBACK_H 9 #define __LINUX_FS_NFS_CALLBACK_H 10 11 #define NFS4_CALLBACK 0x40000000 12 #define NFS4_CALLBACK_XDRSIZE 2048 13 #define NFS4_CALLBACK_BUFSIZE (1024 + NFS4_CALLBACK_XDRSIZE) 14 15 enum nfs4_callback_procnum { 16 CB_NULL = 0, 17 CB_COMPOUND = 1, 18 }; 19 20 enum nfs4_callback_opnum { 21 OP_CB_GETATTR = 3, 22 OP_CB_RECALL = 4, 23 /* Callback operations new to NFSv4.1 */ 24 OP_CB_LAYOUTRECALL = 5, 25 OP_CB_NOTIFY = 6, 26 OP_CB_PUSH_DELEG = 7, 27 OP_CB_RECALL_ANY = 8, 28 OP_CB_RECALLABLE_OBJ_AVAIL = 9, 29 OP_CB_RECALL_SLOT = 10, 30 OP_CB_SEQUENCE = 11, 31 OP_CB_WANTS_CANCELLED = 12, 32 OP_CB_NOTIFY_LOCK = 13, 33 OP_CB_NOTIFY_DEVICEID = 14, 34 OP_CB_ILLEGAL = 10044, 35 }; 36 37 struct cb_compound_hdr_arg { 38 unsigned int taglen; 39 const char *tag; 40 unsigned int minorversion; 41 unsigned nops; 42 }; 43 44 struct cb_compound_hdr_res { 45 __be32 *status; 46 unsigned int taglen; 47 const char *tag; 48 __be32 *nops; 49 }; 50 51 struct cb_getattrargs { 52 struct sockaddr *addr; 53 struct nfs_fh fh; 54 uint32_t bitmap[2]; 55 }; 56 57 struct cb_getattrres { 58 __be32 status; 59 uint32_t bitmap[2]; 60 uint64_t size; 61 uint64_t change_attr; 62 struct timespec ctime; 63 struct timespec mtime; 64 }; 65 66 struct cb_recallargs { 67 struct sockaddr *addr; 68 struct nfs_fh fh; 69 nfs4_stateid stateid; 70 uint32_t truncate; 71 }; 72 73 #if defined(CONFIG_NFS_V4_1) 74 75 struct referring_call { 76 uint32_t rc_sequenceid; 77 uint32_t rc_slotid; 78 }; 79 80 struct referring_call_list { 81 struct nfs4_sessionid rcl_sessionid; 82 uint32_t rcl_nrefcalls; 83 struct referring_call *rcl_refcalls; 84 }; 85 86 struct cb_sequenceargs { 87 struct sockaddr *csa_addr; 88 struct nfs4_sessionid csa_sessionid; 89 uint32_t csa_sequenceid; 90 uint32_t csa_slotid; 91 uint32_t csa_highestslotid; 92 uint32_t csa_cachethis; 93 uint32_t csa_nrclists; 94 struct referring_call_list *csa_rclists; 95 }; 96 97 struct cb_sequenceres { 98 __be32 csr_status; 99 struct nfs4_sessionid csr_sessionid; 100 uint32_t csr_sequenceid; 101 uint32_t csr_slotid; 102 uint32_t csr_highestslotid; 103 uint32_t csr_target_highestslotid; 104 }; 105 106 extern unsigned nfs4_callback_sequence(struct cb_sequenceargs *args, 107 struct cb_sequenceres *res); 108 109 extern int nfs41_validate_delegation_stateid(struct nfs_delegation *delegation, 110 const nfs4_stateid *stateid); 111 112 #define RCA4_TYPE_MASK_RDATA_DLG 0 113 #define RCA4_TYPE_MASK_WDATA_DLG 1 114 115 struct cb_recallanyargs { 116 struct sockaddr *craa_addr; 117 uint32_t craa_objs_to_keep; 118 uint32_t craa_type_mask; 119 }; 120 121 extern unsigned nfs4_callback_recallany(struct cb_recallanyargs *args, void *dummy); 122 #endif /* CONFIG_NFS_V4_1 */ 123 124 extern __be32 nfs4_callback_getattr(struct cb_getattrargs *args, struct cb_getattrres *res); 125 extern __be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy); 126 127 #ifdef CONFIG_NFS_V4 128 extern int nfs_callback_up(u32 minorversion, struct rpc_xprt *xprt); 129 extern void nfs_callback_down(int minorversion); 130 extern int nfs4_validate_delegation_stateid(struct nfs_delegation *delegation, 131 const nfs4_stateid *stateid); 132 #endif /* CONFIG_NFS_V4 */ 133 /* 134 * nfs41: Callbacks are expected to not cause substantial latency, 135 * so we limit their concurrency to 1 by setting up the maximum number 136 * of slots for the backchannel. 137 */ 138 #define NFS41_BC_MIN_CALLBACKS 1 139 #define NFS41_BC_MAX_CALLBACKS 1 140 141 extern unsigned int nfs_callback_set_tcpport; 142 extern unsigned short nfs_callback_tcpport; 143 extern unsigned short nfs_callback_tcpport6; 144 145 #endif /* __LINUX_FS_NFS_CALLBACK_H */ 146