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