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