1 #ifndef _NFS_FS_SB 2 #define _NFS_FS_SB 3 4 #include <linux/list.h> 5 #include <linux/backing-dev.h> 6 #include <linux/idr.h> 7 #include <linux/wait.h> 8 #include <linux/nfs_xdr.h> 9 #include <linux/sunrpc/xprt.h> 10 11 #include <linux/atomic.h> 12 13 struct nfs4_session; 14 struct nfs_iostats; 15 struct nlm_host; 16 struct nfs4_sequence_args; 17 struct nfs4_sequence_res; 18 struct nfs_server; 19 struct nfs4_minor_version_ops; 20 struct nfs41_server_scope; 21 struct nfs41_impl_id; 22 23 /* 24 * The nfs_client identifies our client state to the server. 25 */ 26 struct nfs_client { 27 atomic_t cl_count; 28 atomic_t cl_mds_count; 29 int cl_cons_state; /* current construction state (-ve: init error) */ 30 #define NFS_CS_READY 0 /* ready to be used */ 31 #define NFS_CS_INITING 1 /* busy initialising */ 32 #define NFS_CS_SESSION_INITING 2 /* busy initialising session */ 33 unsigned long cl_res_state; /* NFS resources state */ 34 #define NFS_CS_CALLBACK 1 /* - callback started */ 35 #define NFS_CS_IDMAP 2 /* - idmap started */ 36 #define NFS_CS_RENEWD 3 /* - renewd started */ 37 #define NFS_CS_STOP_RENEW 4 /* no more state to renew */ 38 #define NFS_CS_CHECK_LEASE_TIME 5 /* need to check lease time */ 39 unsigned long cl_flags; /* behavior switches */ 40 #define NFS_CS_NORESVPORT 0 /* - use ephemeral src port */ 41 #define NFS_CS_DISCRTRY 1 /* - disconnect on RPC retry */ 42 #define NFS_CS_MIGRATION 2 /* - transparent state migr */ 43 struct sockaddr_storage cl_addr; /* server identifier */ 44 size_t cl_addrlen; 45 char * cl_hostname; /* hostname of server */ 46 struct list_head cl_share_link; /* link in global client list */ 47 struct list_head cl_superblocks; /* List of nfs_server structs */ 48 49 struct rpc_clnt * cl_rpcclient; 50 const struct nfs_rpc_ops *rpc_ops; /* NFS protocol vector */ 51 int cl_proto; /* Network transport protocol */ 52 struct nfs_subversion * cl_nfs_mod; /* pointer to nfs version module */ 53 54 u32 cl_minorversion;/* NFSv4 minorversion */ 55 struct rpc_cred *cl_machine_cred; 56 57 #if IS_ENABLED(CONFIG_NFS_V4) 58 u64 cl_clientid; /* constant */ 59 nfs4_verifier cl_confirm; /* Clientid verifier */ 60 unsigned long cl_state; 61 62 spinlock_t cl_lock; 63 64 unsigned long cl_lease_time; 65 unsigned long cl_last_renewal; 66 struct delayed_work cl_renewd; 67 68 struct rpc_wait_queue cl_rpcwaitq; 69 70 /* idmapper */ 71 struct idmap * cl_idmap; 72 73 /* Our own IP address, as a null-terminated string. 74 * This is used to generate the mv0 callback address. 75 */ 76 char cl_ipaddr[48]; 77 u32 cl_cb_ident; /* v4.0 callback identifier */ 78 const struct nfs4_minor_version_ops *cl_mvops; 79 80 /* The sequence id to use for the next CREATE_SESSION */ 81 u32 cl_seqid; 82 /* The flags used for obtaining the clientid during EXCHANGE_ID */ 83 u32 cl_exchange_flags; 84 struct nfs4_session *cl_session; /* shared session */ 85 bool cl_preserve_clid; 86 struct nfs41_server_owner *cl_serverowner; 87 struct nfs41_server_scope *cl_serverscope; 88 struct nfs41_impl_id *cl_implid; 89 #endif /* CONFIG_NFS_V4 */ 90 91 #ifdef CONFIG_NFS_FSCACHE 92 struct fscache_cookie *fscache; /* client index cache cookie */ 93 #endif 94 95 struct net *cl_net; 96 }; 97 98 /* 99 * NFS client parameters stored in the superblock. 100 */ 101 struct nfs_server { 102 struct nfs_client * nfs_client; /* shared client and NFS4 state */ 103 struct list_head client_link; /* List of other nfs_server structs 104 * that share the same client 105 */ 106 struct list_head master_link; /* link in master servers list */ 107 struct rpc_clnt * client; /* RPC client handle */ 108 struct rpc_clnt * client_acl; /* ACL RPC client handle */ 109 struct nlm_host *nlm_host; /* NLM client handle */ 110 struct nfs_iostats __percpu *io_stats; /* I/O statistics */ 111 struct backing_dev_info backing_dev_info; 112 atomic_long_t writeback; /* number of writeback pages */ 113 int flags; /* various flags */ 114 unsigned int caps; /* server capabilities */ 115 unsigned int rsize; /* read size */ 116 unsigned int rpages; /* read size (in pages) */ 117 unsigned int wsize; /* write size */ 118 unsigned int wpages; /* write size (in pages) */ 119 unsigned int wtmult; /* server disk block size */ 120 unsigned int dtsize; /* readdir size */ 121 unsigned short port; /* "port=" setting */ 122 unsigned int bsize; /* server block size */ 123 unsigned int acregmin; /* attr cache timeouts */ 124 unsigned int acregmax; 125 unsigned int acdirmin; 126 unsigned int acdirmax; 127 unsigned int namelen; 128 unsigned int options; /* extra options enabled by mount */ 129 #define NFS_OPTION_FSCACHE 0x00000001 /* - local caching enabled */ 130 #define NFS_OPTION_MIGRATION 0x00000002 /* - NFSv4 migration enabled */ 131 132 struct nfs_fsid fsid; 133 __u64 maxfilesize; /* maximum file size */ 134 struct timespec time_delta; /* smallest time granularity */ 135 unsigned long mount_time; /* when this fs was mounted */ 136 dev_t s_dev; /* superblock dev numbers */ 137 138 #ifdef CONFIG_NFS_FSCACHE 139 struct nfs_fscache_key *fscache_key; /* unique key for superblock */ 140 struct fscache_cookie *fscache; /* superblock cookie */ 141 #endif 142 143 u32 pnfs_blksize; /* layout_blksize attr */ 144 #if IS_ENABLED(CONFIG_NFS_V4) 145 u32 attr_bitmask[3];/* V4 bitmask representing the set 146 of attributes supported on this 147 filesystem */ 148 u32 cache_consistency_bitmask[2]; 149 /* V4 bitmask representing the subset 150 of change attribute, size, ctime 151 and mtime attributes supported by 152 the server */ 153 u32 acl_bitmask; /* V4 bitmask representing the ACEs 154 that are supported on this 155 filesystem */ 156 u32 fh_expire_type; /* V4 bitmask representing file 157 handle volatility type for 158 this filesystem */ 159 struct pnfs_layoutdriver_type *pnfs_curr_ld; /* Active layout driver */ 160 struct rpc_wait_queue roc_rpcwaitq; 161 void *pnfs_ld_data; /* per mount point data */ 162 163 /* the following fields are protected by nfs_client->cl_lock */ 164 struct rb_root state_owners; 165 #endif 166 struct ida openowner_id; 167 struct ida lockowner_id; 168 struct list_head state_owners_lru; 169 struct list_head layouts; 170 struct list_head delegations; 171 void (*destroy)(struct nfs_server *); 172 173 atomic_t active; /* Keep trace of any activity to this server */ 174 175 /* mountd-related mount options */ 176 struct sockaddr_storage mountd_address; 177 size_t mountd_addrlen; 178 u32 mountd_version; 179 unsigned short mountd_port; 180 unsigned short mountd_protocol; 181 }; 182 183 /* Server capabilities */ 184 #define NFS_CAP_READDIRPLUS (1U << 0) 185 #define NFS_CAP_HARDLINKS (1U << 1) 186 #define NFS_CAP_SYMLINKS (1U << 2) 187 #define NFS_CAP_ACLS (1U << 3) 188 #define NFS_CAP_ATOMIC_OPEN (1U << 4) 189 #define NFS_CAP_CHANGE_ATTR (1U << 5) 190 #define NFS_CAP_FILEID (1U << 6) 191 #define NFS_CAP_MODE (1U << 7) 192 #define NFS_CAP_NLINK (1U << 8) 193 #define NFS_CAP_OWNER (1U << 9) 194 #define NFS_CAP_OWNER_GROUP (1U << 10) 195 #define NFS_CAP_ATIME (1U << 11) 196 #define NFS_CAP_CTIME (1U << 12) 197 #define NFS_CAP_MTIME (1U << 13) 198 #define NFS_CAP_POSIX_LOCK (1U << 14) 199 #define NFS_CAP_UIDGID_NOMAP (1U << 15) 200 201 202 /* maximum number of slots to use */ 203 #define NFS4_DEF_SLOT_TABLE_SIZE (16U) 204 #define NFS4_MAX_SLOT_TABLE (256U) 205 #define NFS4_NO_SLOT ((u32)-1) 206 207 #if IS_ENABLED(CONFIG_NFS_V4) 208 209 /* Sessions */ 210 #define SLOT_TABLE_SZ DIV_ROUND_UP(NFS4_MAX_SLOT_TABLE, 8*sizeof(long)) 211 struct nfs4_slot_table { 212 struct nfs4_slot *slots; /* seqid per slot */ 213 unsigned long used_slots[SLOT_TABLE_SZ]; /* used/unused bitmap */ 214 spinlock_t slot_tbl_lock; 215 struct rpc_wait_queue slot_tbl_waitq; /* allocators may wait here */ 216 u32 max_slots; /* # slots in table */ 217 u32 highest_used_slotid; /* sent to server on each SEQ. 218 * op for dynamic resizing */ 219 u32 target_max_slots; /* Set by CB_RECALL_SLOT as 220 * the new max_slots */ 221 struct completion complete; 222 }; 223 224 static inline int slot_idx(struct nfs4_slot_table *tbl, struct nfs4_slot *sp) 225 { 226 return sp - tbl->slots; 227 } 228 229 /* 230 * Session related parameters 231 */ 232 struct nfs4_session { 233 struct nfs4_sessionid sess_id; 234 u32 flags; 235 unsigned long session_state; 236 u32 hash_alg; 237 u32 ssv_len; 238 239 /* The fore and back channel */ 240 struct nfs4_channel_attrs fc_attrs; 241 struct nfs4_slot_table fc_slot_table; 242 struct nfs4_channel_attrs bc_attrs; 243 struct nfs4_slot_table bc_slot_table; 244 struct nfs_client *clp; 245 }; 246 247 #endif /* CONFIG_NFS_V4 */ 248 #endif 249