4 #include <linux/list.h>
5 #include <linux/backing-dev.h>
7 #include <linux/wait.h>
8 #include <linux/nfs_xdr.h>
9 #include <linux/sunrpc/xprt.h>
11 #include <linux/atomic.h>
16 struct nfs4_sequence_args;
17 struct nfs4_sequence_res;
19 struct nfs4_minor_version_ops;
20 struct nfs41_server_scope;
24 * The nfs_client identifies our client state to the server.
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 */
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 */
48 struct rpc_clnt * cl_rpcclient;
49 const struct nfs_rpc_ops *rpc_ops; /* NFS protocol vector */
50 int cl_proto; /* Network transport protocol */
52 u32 cl_minorversion;/* NFSv4 minorversion */
53 struct rpc_cred *cl_machine_cred;
56 u64 cl_clientid; /* constant */
57 nfs4_verifier cl_confirm; /* Clientid verifier */
58 unsigned long cl_state;
62 unsigned long cl_lease_time;
63 unsigned long cl_last_renewal;
64 struct delayed_work cl_renewd;
66 struct rpc_wait_queue cl_rpcwaitq;
69 struct idmap * cl_idmap;
71 /* Our own IP address, as a null-terminated string.
72 * This is used to generate the mv0 callback address.
75 u32 cl_cb_ident; /* v4.0 callback identifier */
76 const struct nfs4_minor_version_ops *cl_mvops;
78 /* The sequence id to use for the next CREATE_SESSION */
80 /* The flags used for obtaining the clientid during EXCHANGE_ID */
81 u32 cl_exchange_flags;
82 struct nfs4_session *cl_session; /* shared session */
83 struct nfs41_server_owner *cl_serverowner;
84 struct nfs41_server_scope *cl_serverscope;
85 struct nfs41_impl_id *cl_implid;
86 #endif /* CONFIG_NFS_V4 */
88 #ifdef CONFIG_NFS_FSCACHE
89 struct fscache_cookie *fscache; /* client index cache cookie */
96 * NFS client parameters stored in the superblock.
99 struct nfs_client * nfs_client; /* shared client and NFS4 state */
100 struct list_head client_link; /* List of other nfs_server structs
101 * that share the same client
103 struct list_head master_link; /* link in master servers list */
104 struct rpc_clnt * client; /* RPC client handle */
105 struct rpc_clnt * client_acl; /* ACL RPC client handle */
106 struct nlm_host *nlm_host; /* NLM client handle */
107 struct nfs_iostats __percpu *io_stats; /* I/O statistics */
108 struct backing_dev_info backing_dev_info;
109 atomic_long_t writeback; /* number of writeback pages */
110 int flags; /* various flags */
111 unsigned int caps; /* server capabilities */
112 unsigned int rsize; /* read size */
113 unsigned int rpages; /* read size (in pages) */
114 unsigned int wsize; /* write size */
115 unsigned int wpages; /* write size (in pages) */
116 unsigned int wtmult; /* server disk block size */
117 unsigned int dtsize; /* readdir size */
118 unsigned short port; /* "port=" setting */
119 unsigned int bsize; /* server block size */
120 unsigned int acregmin; /* attr cache timeouts */
121 unsigned int acregmax;
122 unsigned int acdirmin;
123 unsigned int acdirmax;
124 unsigned int namelen;
125 unsigned int options; /* extra options enabled by mount */
126 #define NFS_OPTION_FSCACHE 0x00000001 /* - local caching enabled */
128 struct nfs_fsid fsid;
129 __u64 maxfilesize; /* maximum file size */
130 struct timespec time_delta; /* smallest time granularity */
131 unsigned long mount_time; /* when this fs was mounted */
132 dev_t s_dev; /* superblock dev numbers */
134 #ifdef CONFIG_NFS_FSCACHE
135 struct nfs_fscache_key *fscache_key; /* unique key for superblock */
136 struct fscache_cookie *fscache; /* superblock cookie */
139 u32 pnfs_blksize; /* layout_blksize attr */
141 u32 attr_bitmask[3];/* V4 bitmask representing the set
142 of attributes supported on this
144 u32 cache_consistency_bitmask[2];
145 /* V4 bitmask representing the subset
146 of change attribute, size, ctime
147 and mtime attributes supported by
149 u32 acl_bitmask; /* V4 bitmask representing the ACEs
150 that are supported on this
152 u32 fh_expire_type; /* V4 bitmask representing file
153 handle volatility type for
155 struct pnfs_layoutdriver_type *pnfs_curr_ld; /* Active layout driver */
156 struct rpc_wait_queue roc_rpcwaitq;
157 void *pnfs_ld_data; /* per mount point data */
159 /* the following fields are protected by nfs_client->cl_lock */
160 struct rb_root state_owners;
162 struct ida openowner_id;
163 struct ida lockowner_id;
164 struct list_head state_owners_lru;
165 struct list_head layouts;
166 struct list_head delegations;
167 void (*destroy)(struct nfs_server *);
169 atomic_t active; /* Keep trace of any activity to this server */
171 /* mountd-related mount options */
172 struct sockaddr_storage mountd_address;
173 size_t mountd_addrlen;
175 unsigned short mountd_port;
176 unsigned short mountd_protocol;
179 /* Server capabilities */
180 #define NFS_CAP_READDIRPLUS (1U << 0)
181 #define NFS_CAP_HARDLINKS (1U << 1)
182 #define NFS_CAP_SYMLINKS (1U << 2)
183 #define NFS_CAP_ACLS (1U << 3)
184 #define NFS_CAP_ATOMIC_OPEN (1U << 4)
185 #define NFS_CAP_CHANGE_ATTR (1U << 5)
186 #define NFS_CAP_FILEID (1U << 6)
187 #define NFS_CAP_MODE (1U << 7)
188 #define NFS_CAP_NLINK (1U << 8)
189 #define NFS_CAP_OWNER (1U << 9)
190 #define NFS_CAP_OWNER_GROUP (1U << 10)
191 #define NFS_CAP_ATIME (1U << 11)
192 #define NFS_CAP_CTIME (1U << 12)
193 #define NFS_CAP_MTIME (1U << 13)
194 #define NFS_CAP_POSIX_LOCK (1U << 14)
195 #define NFS_CAP_UIDGID_NOMAP (1U << 15)
198 /* maximum number of slots to use */
199 #define NFS4_DEF_SLOT_TABLE_SIZE (16U)
200 #define NFS4_MAX_SLOT_TABLE (256U)
201 #define NFS4_NO_SLOT ((u32)-1)
203 #if defined(CONFIG_NFS_V4)
206 #define SLOT_TABLE_SZ DIV_ROUND_UP(NFS4_MAX_SLOT_TABLE, 8*sizeof(long))
207 struct nfs4_slot_table {
208 struct nfs4_slot *slots; /* seqid per slot */
209 unsigned long used_slots[SLOT_TABLE_SZ]; /* used/unused bitmap */
210 spinlock_t slot_tbl_lock;
211 struct rpc_wait_queue slot_tbl_waitq; /* allocators may wait here */
212 u32 max_slots; /* # slots in table */
213 u32 highest_used_slotid; /* sent to server on each SEQ.
214 * op for dynamic resizing */
215 u32 target_max_slots; /* Set by CB_RECALL_SLOT as
216 * the new max_slots */
217 struct completion complete;
220 static inline int slot_idx(struct nfs4_slot_table *tbl, struct nfs4_slot *sp)
222 return sp - tbl->slots;
226 * Session related parameters
228 struct nfs4_session {
229 struct nfs4_sessionid sess_id;
231 unsigned long session_state;
235 /* The fore and back channel */
236 struct nfs4_channel_attrs fc_attrs;
237 struct nfs4_slot_table fc_slot_table;
238 struct nfs4_channel_attrs bc_attrs;
239 struct nfs4_slot_table bc_slot_table;
240 struct nfs_client *clp;
243 #endif /* CONFIG_NFS_V4 */