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>
10 #include <asm/atomic.h>
15 struct nfs4_sequence_args;
16 struct nfs4_sequence_res;
18 struct nfs4_minor_version_ops;
21 * The nfs_client identifies our client state to the server.
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 struct sockaddr_storage cl_addr; /* server identifier */
35 char * cl_hostname; /* hostname of server */
36 struct list_head cl_share_link; /* link in global client list */
37 struct list_head cl_superblocks; /* List of nfs_server structs */
39 struct rpc_clnt * cl_rpcclient;
40 const struct nfs_rpc_ops *rpc_ops; /* NFS protocol vector */
41 int cl_proto; /* Network transport protocol */
43 u32 cl_minorversion;/* NFSv4 minorversion */
44 struct rpc_cred *cl_machine_cred;
47 u64 cl_clientid; /* constant */
48 unsigned long cl_state;
52 unsigned long cl_lease_time;
53 unsigned long cl_last_renewal;
54 struct delayed_work cl_renewd;
56 struct rpc_wait_queue cl_rpcwaitq;
58 /* used for the setclientid verifier */
59 struct timespec cl_boot_time;
62 struct idmap * cl_idmap;
64 /* Our own IP address, as a null-terminated string.
65 * This is used to generate the clientid, and the callback address.
68 unsigned char cl_id_uniquifier;
69 u32 cl_cb_ident; /* v4.0 callback identifier */
70 const struct nfs4_minor_version_ops *cl_mvops;
71 #endif /* CONFIG_NFS_V4 */
73 #ifdef CONFIG_NFS_V4_1
74 /* The sequence id to use for the next CREATE_SESSION */
76 /* The flags used for obtaining the clientid during EXCHANGE_ID */
77 u32 cl_exchange_flags;
78 struct nfs4_session *cl_session; /* sharred session */
79 struct list_head cl_layouts;
80 struct pnfs_deviceid_cache *cl_devid_cache; /* pNFS deviceid cache */
81 #endif /* CONFIG_NFS_V4_1 */
83 #ifdef CONFIG_NFS_FSCACHE
84 struct fscache_cookie *fscache; /* client index cache cookie */
89 * NFS client parameters stored in the superblock.
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
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 */
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 */
127 #ifdef CONFIG_NFS_FSCACHE
128 struct nfs_fscache_key *fscache_key; /* unique key for superblock */
129 struct fscache_cookie *fscache; /* superblock cookie */
133 u32 attr_bitmask[2];/* V4 bitmask representing the set
134 of attributes supported on this
136 u32 cache_consistency_bitmask[2];
137 /* V4 bitmask representing the subset
138 of change attribute, size, ctime
139 and mtime attributes supported by
141 u32 acl_bitmask; /* V4 bitmask representing the ACEs
142 that are supported on this
144 struct pnfs_layoutdriver_type *pnfs_curr_ld; /* Active layout driver */
145 struct rpc_wait_queue roc_rpcwaitq;
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;
152 struct list_head delegations;
153 void (*destroy)(struct nfs_server *);
155 atomic_t active; /* Keep trace of any activity to this server */
157 /* mountd-related mount options */
158 struct sockaddr_storage mountd_address;
159 size_t mountd_addrlen;
161 unsigned short mountd_port;
162 unsigned short mountd_protocol;
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)
183 /* maximum number of slots to use */
184 #define NFS4_MAX_SLOT_TABLE RPC_MAX_SLOT_TABLE
186 #if defined(CONFIG_NFS_V4_1)
189 #define SLOT_TABLE_SZ (NFS4_MAX_SLOT_TABLE/(8*sizeof(long)))
190 struct nfs4_slot_table {
191 struct nfs4_slot *slots; /* seqid per slot */
192 unsigned long used_slots[SLOT_TABLE_SZ]; /* used/unused bitmap */
193 spinlock_t slot_tbl_lock;
194 struct rpc_wait_queue slot_tbl_waitq; /* allocators may wait here */
195 int max_slots; /* # slots in table */
196 int highest_used_slotid; /* sent to server on each SEQ.
197 * op for dynamic resizing */
198 int target_max_slots; /* Set by CB_RECALL_SLOT as
199 * the new max_slots */
200 struct completion complete;
203 static inline int slot_idx(struct nfs4_slot_table *tbl, struct nfs4_slot *sp)
205 return sp - tbl->slots;
209 * Session related parameters
211 struct nfs4_session {
212 struct nfs4_sessionid sess_id;
214 unsigned long session_state;
218 /* The fore and back channel */
219 struct nfs4_channel_attrs fc_attrs;
220 struct nfs4_slot_table fc_slot_table;
221 struct nfs4_channel_attrs bc_attrs;
222 struct nfs4_slot_table bc_slot_table;
223 struct nfs_client *clp;
226 #endif /* CONFIG_NFS_V4_1 */