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