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 struct sockaddr_storage cl_addr; /* server identifier */ 43 size_t cl_addrlen; 44 char * cl_hostname; /* hostname of server */ 45 struct list_head cl_share_link; /* link in global client list */ 46 struct list_head cl_superblocks; /* List of nfs_server structs */ 47 48 struct rpc_clnt * cl_rpcclient; 49 const struct nfs_rpc_ops *rpc_ops; /* NFS protocol vector */ 50 int cl_proto; /* Network transport protocol */ 51 struct nfs_subversion * cl_nfs_mod; /* pointer to nfs version module */ 52 53 u32 cl_minorversion;/* NFSv4 minorversion */ 54 struct rpc_cred *cl_machine_cred; 55 56 #if IS_ENABLED(CONFIG_NFS_V4) 57 u64 cl_clientid; /* constant */ 58 nfs4_verifier cl_confirm; /* Clientid verifier */ 59 unsigned long cl_state; 60 61 spinlock_t cl_lock; 62 63 unsigned long cl_lease_time; 64 unsigned long cl_last_renewal; 65 struct delayed_work cl_renewd; 66 67 struct rpc_wait_queue cl_rpcwaitq; 68 69 /* idmapper */ 70 struct idmap * cl_idmap; 71 72 /* Our own IP address, as a null-terminated string. 73 * This is used to generate the mv0 callback address. 74 */ 75 char cl_ipaddr[48]; 76 u32 cl_cb_ident; /* v4.0 callback identifier */ 77 const struct nfs4_minor_version_ops *cl_mvops; 78 79 /* The sequence id to use for the next CREATE_SESSION */ 80 u32 cl_seqid; 81 /* The flags used for obtaining the clientid during EXCHANGE_ID */ 82 u32 cl_exchange_flags; 83 struct nfs4_session *cl_session; /* shared session */ 84 struct nfs41_server_owner *cl_serverowner; 85 struct nfs41_server_scope *cl_serverscope; 86 struct nfs41_impl_id *cl_implid; 87 #endif /* CONFIG_NFS_V4 */ 88 89 #ifdef CONFIG_NFS_FSCACHE 90 struct fscache_cookie *fscache; /* client index cache cookie */ 91 #endif 92 93 struct net *cl_net; 94 }; 95 96 /* 97 * NFS client parameters stored in the superblock. 98 */ 99 struct nfs_server { 100 struct nfs_client * nfs_client; /* shared client and NFS4 state */ 101 struct list_head client_link; /* List of other nfs_server structs 102 * that share the same client 103 */ 104 struct list_head master_link; /* link in master servers list */ 105 struct rpc_clnt * client; /* RPC client handle */ 106 struct rpc_clnt * client_acl; /* ACL RPC client handle */ 107 struct nlm_host *nlm_host; /* NLM client handle */ 108 struct nfs_iostats __percpu *io_stats; /* I/O statistics */ 109 struct backing_dev_info backing_dev_info; 110 atomic_long_t writeback; /* number of writeback pages */ 111 int flags; /* various flags */ 112 unsigned int caps; /* server capabilities */ 113 unsigned int rsize; /* read size */ 114 unsigned int rpages; /* read size (in pages) */ 115 unsigned int wsize; /* write size */ 116 unsigned int wpages; /* write size (in pages) */ 117 unsigned int wtmult; /* server disk block size */ 118 unsigned int dtsize; /* readdir size */ 119 unsigned short port; /* "port=" setting */ 120 unsigned int bsize; /* server block size */ 121 unsigned int acregmin; /* attr cache timeouts */ 122 unsigned int acregmax; 123 unsigned int acdirmin; 124 unsigned int acdirmax; 125 unsigned int namelen; 126 unsigned int options; /* extra options enabled by mount */ 127 #define NFS_OPTION_FSCACHE 0x00000001 /* - local caching enabled */ 128 129 struct nfs_fsid fsid; 130 __u64 maxfilesize; /* maximum file size */ 131 struct timespec time_delta; /* smallest time granularity */ 132 unsigned long mount_time; /* when this fs was mounted */ 133 dev_t s_dev; /* superblock dev numbers */ 134 135 #ifdef CONFIG_NFS_FSCACHE 136 struct nfs_fscache_key *fscache_key; /* unique key for superblock */ 137 struct fscache_cookie *fscache; /* superblock cookie */ 138 #endif 139 140 u32 pnfs_blksize; /* layout_blksize attr */ 141 #if IS_ENABLED(CONFIG_NFS_V4) 142 u32 attr_bitmask[3];/* V4 bitmask representing the set 143 of attributes supported on this 144 filesystem */ 145 u32 cache_consistency_bitmask[2]; 146 /* V4 bitmask representing the subset 147 of change attribute, size, ctime 148 and mtime attributes supported by 149 the server */ 150 u32 acl_bitmask; /* V4 bitmask representing the ACEs 151 that are supported on this 152 filesystem */ 153 u32 fh_expire_type; /* V4 bitmask representing file 154 handle volatility type for 155 this filesystem */ 156 struct pnfs_layoutdriver_type *pnfs_curr_ld; /* Active layout driver */ 157 struct rpc_wait_queue roc_rpcwaitq; 158 void *pnfs_ld_data; /* per mount point data */ 159 160 /* the following fields are protected by nfs_client->cl_lock */ 161 struct rb_root state_owners; 162 #endif 163 struct ida openowner_id; 164 struct ida lockowner_id; 165 struct list_head state_owners_lru; 166 struct list_head layouts; 167 struct list_head delegations; 168 void (*destroy)(struct nfs_server *); 169 170 atomic_t active; /* Keep trace of any activity to this server */ 171 172 /* mountd-related mount options */ 173 struct sockaddr_storage mountd_address; 174 size_t mountd_addrlen; 175 u32 mountd_version; 176 unsigned short mountd_port; 177 unsigned short mountd_protocol; 178 }; 179 180 /* Server capabilities */ 181 #define NFS_CAP_READDIRPLUS (1U << 0) 182 #define NFS_CAP_HARDLINKS (1U << 1) 183 #define NFS_CAP_SYMLINKS (1U << 2) 184 #define NFS_CAP_ACLS (1U << 3) 185 #define NFS_CAP_ATOMIC_OPEN (1U << 4) 186 #define NFS_CAP_CHANGE_ATTR (1U << 5) 187 #define NFS_CAP_FILEID (1U << 6) 188 #define NFS_CAP_MODE (1U << 7) 189 #define NFS_CAP_NLINK (1U << 8) 190 #define NFS_CAP_OWNER (1U << 9) 191 #define NFS_CAP_OWNER_GROUP (1U << 10) 192 #define NFS_CAP_ATIME (1U << 11) 193 #define NFS_CAP_CTIME (1U << 12) 194 #define NFS_CAP_MTIME (1U << 13) 195 #define NFS_CAP_POSIX_LOCK (1U << 14) 196 #define NFS_CAP_UIDGID_NOMAP (1U << 15) 197 198 199 /* maximum number of slots to use */ 200 #define NFS4_DEF_SLOT_TABLE_SIZE (16U) 201 #define NFS4_MAX_SLOT_TABLE (256U) 202 #define NFS4_NO_SLOT ((u32)-1) 203 204 #if IS_ENABLED(CONFIG_NFS_V4) 205 206 /* Sessions */ 207 #define SLOT_TABLE_SZ DIV_ROUND_UP(NFS4_MAX_SLOT_TABLE, 8*sizeof(long)) 208 struct nfs4_slot_table { 209 struct nfs4_slot *slots; /* seqid per slot */ 210 unsigned long used_slots[SLOT_TABLE_SZ]; /* used/unused bitmap */ 211 spinlock_t slot_tbl_lock; 212 struct rpc_wait_queue slot_tbl_waitq; /* allocators may wait here */ 213 u32 max_slots; /* # slots in table */ 214 u32 highest_used_slotid; /* sent to server on each SEQ. 215 * op for dynamic resizing */ 216 u32 target_max_slots; /* Set by CB_RECALL_SLOT as 217 * the new max_slots */ 218 struct completion complete; 219 }; 220 221 static inline int slot_idx(struct nfs4_slot_table *tbl, struct nfs4_slot *sp) 222 { 223 return sp - tbl->slots; 224 } 225 226 /* 227 * Session related parameters 228 */ 229 struct nfs4_session { 230 struct nfs4_sessionid sess_id; 231 u32 flags; 232 unsigned long session_state; 233 u32 hash_alg; 234 u32 ssv_len; 235 236 /* The fore and back channel */ 237 struct nfs4_channel_attrs fc_attrs; 238 struct nfs4_slot_table fc_slot_table; 239 struct nfs4_channel_attrs bc_attrs; 240 struct nfs4_slot_table bc_slot_table; 241 struct nfs_client *clp; 242 }; 243 244 #endif /* CONFIG_NFS_V4 */ 245 #endif 246