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 #include <linux/sunrpc/svc.h> 11 12 #define NFS4_CALLBACK 0x40000000 13 #define NFS4_CALLBACK_XDRSIZE 2048 14 #define NFS4_CALLBACK_BUFSIZE (1024 + NFS4_CALLBACK_XDRSIZE) 15 16 enum nfs4_callback_procnum { 17 CB_NULL = 0, 18 CB_COMPOUND = 1, 19 }; 20 21 enum nfs4_callback_opnum { 22 OP_CB_GETATTR = 3, 23 OP_CB_RECALL = 4, 24 /* Callback operations new to NFSv4.1 */ 25 OP_CB_LAYOUTRECALL = 5, 26 OP_CB_NOTIFY = 6, 27 OP_CB_PUSH_DELEG = 7, 28 OP_CB_RECALL_ANY = 8, 29 OP_CB_RECALLABLE_OBJ_AVAIL = 9, 30 OP_CB_RECALL_SLOT = 10, 31 OP_CB_SEQUENCE = 11, 32 OP_CB_WANTS_CANCELLED = 12, 33 OP_CB_NOTIFY_LOCK = 13, 34 OP_CB_NOTIFY_DEVICEID = 14, 35 OP_CB_ILLEGAL = 10044, 36 }; 37 38 struct cb_process_state { 39 __be32 drc_status; 40 struct nfs_client *clp; 41 }; 42 43 struct cb_compound_hdr_arg { 44 unsigned int taglen; 45 const char *tag; 46 unsigned int minorversion; 47 unsigned int cb_ident; /* v4.0 callback identifier */ 48 unsigned nops; 49 }; 50 51 struct cb_compound_hdr_res { 52 __be32 *status; 53 unsigned int taglen; 54 const char *tag; 55 __be32 *nops; 56 }; 57 58 struct cb_getattrargs { 59 struct sockaddr *addr; 60 struct nfs_fh fh; 61 uint32_t bitmap[2]; 62 }; 63 64 struct cb_getattrres { 65 __be32 status; 66 uint32_t bitmap[2]; 67 uint64_t size; 68 uint64_t change_attr; 69 struct timespec ctime; 70 struct timespec mtime; 71 }; 72 73 struct cb_recallargs { 74 struct sockaddr *addr; 75 struct nfs_fh fh; 76 nfs4_stateid stateid; 77 uint32_t truncate; 78 }; 79 80 #if defined(CONFIG_NFS_V4_1) 81 82 struct referring_call { 83 uint32_t rc_sequenceid; 84 uint32_t rc_slotid; 85 }; 86 87 struct referring_call_list { 88 struct nfs4_sessionid rcl_sessionid; 89 uint32_t rcl_nrefcalls; 90 struct referring_call *rcl_refcalls; 91 }; 92 93 struct cb_sequenceargs { 94 struct sockaddr *csa_addr; 95 struct nfs4_sessionid csa_sessionid; 96 uint32_t csa_sequenceid; 97 uint32_t csa_slotid; 98 uint32_t csa_highestslotid; 99 uint32_t csa_cachethis; 100 uint32_t csa_nrclists; 101 struct referring_call_list *csa_rclists; 102 }; 103 104 struct cb_sequenceres { 105 __be32 csr_status; 106 struct nfs4_sessionid csr_sessionid; 107 uint32_t csr_sequenceid; 108 uint32_t csr_slotid; 109 uint32_t csr_highestslotid; 110 uint32_t csr_target_highestslotid; 111 }; 112 113 extern __be32 nfs4_callback_sequence(struct cb_sequenceargs *args, 114 struct cb_sequenceres *res, 115 struct cb_process_state *cps); 116 117 extern int nfs41_validate_delegation_stateid(struct nfs_delegation *delegation, 118 const nfs4_stateid *stateid); 119 120 #define RCA4_TYPE_MASK_RDATA_DLG 0 121 #define RCA4_TYPE_MASK_WDATA_DLG 1 122 #define RCA4_TYPE_MASK_DIR_DLG 2 123 #define RCA4_TYPE_MASK_FILE_LAYOUT 3 124 #define RCA4_TYPE_MASK_BLK_LAYOUT 4 125 #define RCA4_TYPE_MASK_OBJ_LAYOUT_MIN 8 126 #define RCA4_TYPE_MASK_OBJ_LAYOUT_MAX 9 127 #define RCA4_TYPE_MASK_OTHER_LAYOUT_MIN 12 128 #define RCA4_TYPE_MASK_OTHER_LAYOUT_MAX 15 129 #define RCA4_TYPE_MASK_ALL 0xf31f 130 131 struct cb_recallanyargs { 132 struct sockaddr *craa_addr; 133 uint32_t craa_objs_to_keep; 134 uint32_t craa_type_mask; 135 }; 136 137 extern __be32 nfs4_callback_recallany(struct cb_recallanyargs *args, 138 void *dummy, 139 struct cb_process_state *cps); 140 141 struct cb_recallslotargs { 142 struct sockaddr *crsa_addr; 143 uint32_t crsa_target_max_slots; 144 }; 145 extern __be32 nfs4_callback_recallslot(struct cb_recallslotargs *args, 146 void *dummy, 147 struct cb_process_state *cps); 148 149 struct cb_layoutrecallargs { 150 struct sockaddr *cbl_addr; 151 uint32_t cbl_recall_type; 152 uint32_t cbl_layout_type; 153 uint32_t cbl_layoutchanged; 154 union { 155 struct { 156 struct nfs_fh cbl_fh; 157 struct pnfs_layout_range cbl_range; 158 nfs4_stateid cbl_stateid; 159 }; 160 struct nfs_fsid cbl_fsid; 161 }; 162 }; 163 164 extern unsigned nfs4_callback_layoutrecall( 165 struct cb_layoutrecallargs *args, 166 void *dummy, struct cb_process_state *cps); 167 168 extern void nfs4_check_drain_bc_complete(struct nfs4_session *ses); 169 extern void nfs4_cb_take_slot(struct nfs_client *clp); 170 #endif /* CONFIG_NFS_V4_1 */ 171 extern int check_gss_callback_principal(struct nfs_client *, struct svc_rqst *); 172 extern __be32 nfs4_callback_getattr(struct cb_getattrargs *args, 173 struct cb_getattrres *res, 174 struct cb_process_state *cps); 175 extern __be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy, 176 struct cb_process_state *cps); 177 #ifdef CONFIG_NFS_V4 178 extern int nfs_callback_up(u32 minorversion, struct rpc_xprt *xprt); 179 extern void nfs_callback_down(int minorversion); 180 extern int nfs4_validate_delegation_stateid(struct nfs_delegation *delegation, 181 const nfs4_stateid *stateid); 182 extern int nfs4_set_callback_sessionid(struct nfs_client *clp); 183 #endif /* CONFIG_NFS_V4 */ 184 /* 185 * nfs41: Callbacks are expected to not cause substantial latency, 186 * so we limit their concurrency to 1 by setting up the maximum number 187 * of slots for the backchannel. 188 */ 189 #define NFS41_BC_MIN_CALLBACKS 1 190 #define NFS41_BC_MAX_CALLBACKS 1 191 192 extern unsigned int nfs_callback_set_tcpport; 193 extern unsigned short nfs_callback_tcpport; 194 extern unsigned short nfs_callback_tcpport6; 195 196 #endif /* __LINUX_FS_NFS_CALLBACK_H */ 197