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 int slotid; 42 }; 43 44 struct cb_compound_hdr_arg { 45 unsigned int taglen; 46 const char *tag; 47 unsigned int minorversion; 48 unsigned int cb_ident; /* v4.0 callback identifier */ 49 unsigned nops; 50 }; 51 52 struct cb_compound_hdr_res { 53 __be32 *status; 54 unsigned int taglen; 55 const char *tag; 56 __be32 *nops; 57 }; 58 59 struct cb_getattrargs { 60 struct sockaddr *addr; 61 struct nfs_fh fh; 62 uint32_t bitmap[2]; 63 }; 64 65 struct cb_getattrres { 66 __be32 status; 67 uint32_t bitmap[2]; 68 uint64_t size; 69 uint64_t change_attr; 70 struct timespec ctime; 71 struct timespec mtime; 72 }; 73 74 struct cb_recallargs { 75 struct sockaddr *addr; 76 struct nfs_fh fh; 77 nfs4_stateid stateid; 78 uint32_t truncate; 79 }; 80 81 #if defined(CONFIG_NFS_V4_1) 82 83 struct referring_call { 84 uint32_t rc_sequenceid; 85 uint32_t rc_slotid; 86 }; 87 88 struct referring_call_list { 89 struct nfs4_sessionid rcl_sessionid; 90 uint32_t rcl_nrefcalls; 91 struct referring_call *rcl_refcalls; 92 }; 93 94 struct cb_sequenceargs { 95 struct sockaddr *csa_addr; 96 struct nfs4_sessionid csa_sessionid; 97 uint32_t csa_sequenceid; 98 uint32_t csa_slotid; 99 uint32_t csa_highestslotid; 100 uint32_t csa_cachethis; 101 uint32_t csa_nrclists; 102 struct referring_call_list *csa_rclists; 103 }; 104 105 struct cb_sequenceres { 106 __be32 csr_status; 107 struct nfs4_sessionid csr_sessionid; 108 uint32_t csr_sequenceid; 109 uint32_t csr_slotid; 110 uint32_t csr_highestslotid; 111 uint32_t csr_target_highestslotid; 112 }; 113 114 extern __be32 nfs4_callback_sequence(struct cb_sequenceargs *args, 115 struct cb_sequenceres *res, 116 struct cb_process_state *cps); 117 118 extern int nfs41_validate_delegation_stateid(struct nfs_delegation *delegation, 119 const nfs4_stateid *stateid); 120 121 #define RCA4_TYPE_MASK_RDATA_DLG 0 122 #define RCA4_TYPE_MASK_WDATA_DLG 1 123 #define RCA4_TYPE_MASK_DIR_DLG 2 124 #define RCA4_TYPE_MASK_FILE_LAYOUT 3 125 #define RCA4_TYPE_MASK_BLK_LAYOUT 4 126 #define RCA4_TYPE_MASK_OBJ_LAYOUT_MIN 8 127 #define RCA4_TYPE_MASK_OBJ_LAYOUT_MAX 9 128 #define RCA4_TYPE_MASK_OTHER_LAYOUT_MIN 12 129 #define RCA4_TYPE_MASK_OTHER_LAYOUT_MAX 15 130 #define RCA4_TYPE_MASK_ALL 0xf31f 131 132 struct cb_recallanyargs { 133 struct sockaddr *craa_addr; 134 uint32_t craa_objs_to_keep; 135 uint32_t craa_type_mask; 136 }; 137 138 extern __be32 nfs4_callback_recallany(struct cb_recallanyargs *args, 139 void *dummy, 140 struct cb_process_state *cps); 141 142 struct cb_recallslotargs { 143 struct sockaddr *crsa_addr; 144 uint32_t crsa_target_max_slots; 145 }; 146 extern __be32 nfs4_callback_recallslot(struct cb_recallslotargs *args, 147 void *dummy, 148 struct cb_process_state *cps); 149 150 struct cb_layoutrecallargs { 151 struct sockaddr *cbl_addr; 152 uint32_t cbl_recall_type; 153 uint32_t cbl_layout_type; 154 uint32_t cbl_layoutchanged; 155 union { 156 struct { 157 struct nfs_fh cbl_fh; 158 struct pnfs_layout_range cbl_range; 159 nfs4_stateid cbl_stateid; 160 }; 161 struct nfs_fsid cbl_fsid; 162 }; 163 }; 164 165 extern __be32 nfs4_callback_layoutrecall( 166 struct cb_layoutrecallargs *args, 167 void *dummy, struct cb_process_state *cps); 168 169 extern void nfs4_check_drain_bc_complete(struct nfs4_session *ses); 170 171 struct cb_devicenotifyitem { 172 uint32_t cbd_notify_type; 173 uint32_t cbd_layout_type; 174 struct nfs4_deviceid cbd_dev_id; 175 uint32_t cbd_immediate; 176 }; 177 178 struct cb_devicenotifyargs { 179 int ndevs; 180 struct cb_devicenotifyitem *devs; 181 }; 182 183 extern __be32 nfs4_callback_devicenotify( 184 struct cb_devicenotifyargs *args, 185 void *dummy, struct cb_process_state *cps); 186 187 #endif /* CONFIG_NFS_V4_1 */ 188 extern int check_gss_callback_principal(struct nfs_client *, struct svc_rqst *); 189 extern __be32 nfs4_callback_getattr(struct cb_getattrargs *args, 190 struct cb_getattrres *res, 191 struct cb_process_state *cps); 192 extern __be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy, 193 struct cb_process_state *cps); 194 #ifdef CONFIG_NFS_V4 195 extern int nfs_callback_up(u32 minorversion, struct rpc_xprt *xprt); 196 extern void nfs_callback_down(int minorversion); 197 extern int nfs4_validate_delegation_stateid(struct nfs_delegation *delegation, 198 const nfs4_stateid *stateid); 199 extern int nfs4_set_callback_sessionid(struct nfs_client *clp); 200 #endif /* CONFIG_NFS_V4 */ 201 /* 202 * nfs41: Callbacks are expected to not cause substantial latency, 203 * so we limit their concurrency to 1 by setting up the maximum number 204 * of slots for the backchannel. 205 */ 206 #define NFS41_BC_MIN_CALLBACKS 1 207 #define NFS41_BC_MAX_CALLBACKS 1 208 209 extern unsigned int nfs_callback_set_tcpport; 210 extern unsigned short nfs_callback_tcpport; 211 extern unsigned short nfs_callback_tcpport6; 212 213 #endif /* __LINUX_FS_NFS_CALLBACK_H */ 214