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 12struct nfs4_session; 13struct nfs_iostats; 14struct nlm_host; 15struct nfs4_sequence_args; 16struct nfs4_sequence_res; 17struct nfs_server; 18 19/* 20 * The nfs_client identifies our client state to the server. 21 */ 22struct nfs_client { 23 atomic_t cl_count; 24 int cl_cons_state; /* current construction state (-ve: init error) */ 25#define NFS_CS_READY 0 /* ready to be used */ 26#define NFS_CS_INITING 1 /* busy initialising */ 27#define NFS_CS_SESSION_INITING 2 /* busy initialising session */ 28 unsigned long cl_res_state; /* NFS resources state */ 29#define NFS_CS_CALLBACK 1 /* - callback started */ 30#define NFS_CS_IDMAP 2 /* - idmap started */ 31#define NFS_CS_RENEWD 3 /* - renewd started */ 32 struct sockaddr_storage cl_addr; /* server identifier */ 33 size_t cl_addrlen; 34 char * cl_hostname; /* hostname of server */ 35 struct list_head cl_share_link; /* link in global client list */ 36 struct list_head cl_superblocks; /* List of nfs_server structs */ 37 38 struct rpc_clnt * cl_rpcclient; 39 const struct nfs_rpc_ops *rpc_ops; /* NFS protocol vector */ 40 int cl_proto; /* Network transport protocol */ 41 42 u32 cl_minorversion;/* NFSv4 minorversion */ 43 struct rpc_cred *cl_machine_cred; 44 45#ifdef CONFIG_NFS_V4 46 u64 cl_clientid; /* constant */ 47 nfs4_verifier cl_confirm; 48 unsigned long cl_state; 49 50 struct rb_root cl_openowner_id; 51 struct rb_root cl_lockowner_id; 52 53 struct list_head cl_delegations; 54 struct rb_root cl_state_owners; 55 spinlock_t cl_lock; 56 57 unsigned long cl_lease_time; 58 unsigned long cl_last_renewal; 59 struct delayed_work cl_renewd; 60 61 struct rpc_wait_queue cl_rpcwaitq; 62 63 /* used for the setclientid verifier */ 64 struct timespec cl_boot_time; 65 66 /* idmapper */ 67 struct idmap * cl_idmap; 68 69 /* Our own IP address, as a null-terminated string. 70 * This is used to generate the clientid, and the callback address. 71 */ 72 char cl_ipaddr[48]; 73 unsigned char cl_id_uniquifier; 74 int (* cl_call_sync)(struct nfs_server *server, 75 struct rpc_message *msg, 76 struct nfs4_sequence_args *args, 77 struct nfs4_sequence_res *res, 78 int cache_reply); 79#endif /* CONFIG_NFS_V4 */ 80 81#ifdef CONFIG_NFS_V4_1 82 /* clientid returned from EXCHANGE_ID, used by session operations */ 83 u64 cl_ex_clid; 84 /* The sequence id to use for the next CREATE_SESSION */ 85 u32 cl_seqid; 86 /* The flags used for obtaining the clientid during EXCHANGE_ID */ 87 u32 cl_exchange_flags; 88 struct nfs4_session *cl_session; /* sharred session */ 89#endif /* CONFIG_NFS_V4_1 */ 90 91#ifdef CONFIG_NFS_FSCACHE 92 struct fscache_cookie *fscache; /* client index cache cookie */ 93#endif 94}; 95 96/* 97 * NFS client parameters stored in the superblock. 98 */ 99struct 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 * 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 unsigned long mount_time; /* when this fs was mounted */ 132 dev_t s_dev; /* superblock dev numbers */ 133 134#ifdef CONFIG_NFS_FSCACHE 135 struct nfs_fscache_key *fscache_key; /* unique key for superblock */ 136 struct fscache_cookie *fscache; /* superblock cookie */ 137#endif 138 139#ifdef CONFIG_NFS_V4 140 u32 attr_bitmask[2];/* 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#endif 152 void (*destroy)(struct nfs_server *); 153 154 atomic_t active; /* Keep trace of any activity to this server */ 155 156 /* mountd-related mount options */ 157 struct sockaddr_storage mountd_address; 158 size_t mountd_addrlen; 159 u32 mountd_version; 160 unsigned short mountd_port; 161 unsigned short mountd_protocol; 162}; 163 164/* Server capabilities */ 165#define NFS_CAP_READDIRPLUS (1U << 0) 166#define NFS_CAP_HARDLINKS (1U << 1) 167#define NFS_CAP_SYMLINKS (1U << 2) 168#define NFS_CAP_ACLS (1U << 3) 169#define NFS_CAP_ATOMIC_OPEN (1U << 4) 170#define NFS_CAP_CHANGE_ATTR (1U << 5) 171#define NFS_CAP_FILEID (1U << 6) 172#define NFS_CAP_MODE (1U << 7) 173#define NFS_CAP_NLINK (1U << 8) 174#define NFS_CAP_OWNER (1U << 9) 175#define NFS_CAP_OWNER_GROUP (1U << 10) 176#define NFS_CAP_ATIME (1U << 11) 177#define NFS_CAP_CTIME (1U << 12) 178#define NFS_CAP_MTIME (1U << 13) 179 180 181/* maximum number of slots to use */ 182#define NFS4_MAX_SLOT_TABLE RPC_MAX_SLOT_TABLE 183 184#if defined(CONFIG_NFS_V4_1) 185 186/* Sessions */ 187#define SLOT_TABLE_SZ (NFS4_MAX_SLOT_TABLE/(8*sizeof(long))) 188struct nfs4_slot_table { 189 struct nfs4_slot *slots; /* seqid per slot */ 190 unsigned long used_slots[SLOT_TABLE_SZ]; /* used/unused bitmap */ 191 spinlock_t slot_tbl_lock; 192 struct rpc_wait_queue slot_tbl_waitq; /* allocators may wait here */ 193 int max_slots; /* # slots in table */ 194 int highest_used_slotid; /* sent to server on each SEQ. 195 * op for dynamic resizing */ 196}; 197 198static inline int slot_idx(struct nfs4_slot_table *tbl, struct nfs4_slot *sp) 199{ 200 return sp - tbl->slots; 201} 202 203/* 204 * Session related parameters 205 */ 206struct nfs4_session { 207 struct nfs4_sessionid sess_id; 208 u32 flags; 209 unsigned long session_state; 210 u32 hash_alg; 211 u32 ssv_len; 212 213 /* The fore and back channel */ 214 struct nfs4_channel_attrs fc_attrs; 215 struct nfs4_slot_table fc_slot_table; 216 struct nfs4_channel_attrs bc_attrs; 217 struct nfs4_slot_table bc_slot_table; 218 struct nfs_client *clp; 219}; 220 221#endif /* CONFIG_NFS_V4_1 */ 222#endif 223