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
;
24 * The nfs_client identifies our client state to the server.
28 int cl_cons_state
; /* current construction state (-ve: init error) */
29 #define NFS_CS_READY 0 /* ready to be used */
30 #define NFS_CS_INITING 1 /* busy initialising */
31 #define NFS_CS_SESSION_INITING 2 /* busy initialising session */
32 unsigned long cl_res_state
; /* NFS resources state */
33 #define NFS_CS_CALLBACK 1 /* - callback started */
34 #define NFS_CS_IDMAP 2 /* - idmap started */
35 #define NFS_CS_RENEWD 3 /* - renewd started */
36 #define NFS_CS_STOP_RENEW 4 /* no more state to renew */
37 #define NFS_CS_CHECK_LEASE_TIME 5 /* need to check lease time */
38 struct sockaddr_storage cl_addr
; /* server identifier */
40 char * cl_hostname
; /* hostname of server */
41 struct list_head cl_share_link
; /* link in global client list */
42 struct list_head cl_superblocks
; /* List of nfs_server structs */
44 struct rpc_clnt
* cl_rpcclient
;
45 const struct nfs_rpc_ops
*rpc_ops
; /* NFS protocol vector */
46 int cl_proto
; /* Network transport protocol */
48 u32 cl_minorversion
;/* NFSv4 minorversion */
49 struct rpc_cred
*cl_machine_cred
;
52 u64 cl_clientid
; /* constant */
53 nfs4_verifier cl_confirm
; /* Clientid verifier */
54 unsigned long cl_state
;
58 unsigned long cl_lease_time
;
59 unsigned long cl_last_renewal
;
60 struct delayed_work cl_renewd
;
62 struct rpc_wait_queue cl_rpcwaitq
;
64 /* used for the setclientid verifier */
65 struct timespec cl_boot_time
;
68 struct idmap
* cl_idmap
;
70 /* Our own IP address, as a null-terminated string.
71 * This is used to generate the clientid, and the callback address.
74 unsigned char cl_id_uniquifier
;
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
; /* sharred session */
83 #endif /* CONFIG_NFS_V4 */
85 #ifdef CONFIG_NFS_FSCACHE
86 struct fscache_cookie
*fscache
; /* client index cache cookie */
89 struct server_scope
*server_scope
; /* from exchange_id */
90 struct nfs41_impl_id
*impl_id
; /* from exchange_id */
95 * NFS client parameters stored in the superblock.
98 struct nfs_client
* nfs_client
; /* shared client and NFS4 state */
99 struct list_head client_link
; /* List of other nfs_server structs
100 * that share the same client
102 struct list_head master_link
; /* link in master servers list */
103 struct rpc_clnt
* client
; /* RPC client handle */
104 struct rpc_clnt
* client_acl
; /* ACL RPC client handle */
105 struct nlm_host
*nlm_host
; /* NLM client handle */
106 struct nfs_iostats __percpu
*io_stats
; /* I/O statistics */
107 struct backing_dev_info backing_dev_info
;
108 atomic_long_t writeback
; /* number of writeback pages */
109 int flags
; /* various flags */
110 unsigned int caps
; /* server capabilities */
111 unsigned int rsize
; /* read size */
112 unsigned int rpages
; /* read size (in pages) */
113 unsigned int wsize
; /* write size */
114 unsigned int wpages
; /* write size (in pages) */
115 unsigned int wtmult
; /* server disk block size */
116 unsigned int dtsize
; /* readdir size */
117 unsigned short port
; /* "port=" setting */
118 unsigned int bsize
; /* server block size */
119 unsigned int acregmin
; /* attr cache timeouts */
120 unsigned int acregmax
;
121 unsigned int acdirmin
;
122 unsigned int acdirmax
;
123 unsigned int namelen
;
124 unsigned int options
; /* extra options enabled by mount */
125 #define NFS_OPTION_FSCACHE 0x00000001 /* - local caching enabled */
127 struct nfs_fsid fsid
;
128 __u64 maxfilesize
; /* maximum file size */
129 struct timespec time_delta
; /* smallest time granularity */
130 unsigned long mount_time
; /* when this fs was mounted */
131 dev_t s_dev
; /* superblock dev numbers */
133 #ifdef CONFIG_NFS_FSCACHE
134 struct nfs_fscache_key
*fscache_key
; /* unique key for superblock */
135 struct fscache_cookie
*fscache
; /* superblock cookie */
138 u32 pnfs_blksize
; /* layout_blksize attr */
140 u32 attr_bitmask
[3];/* V4 bitmask representing the set
141 of attributes supported on this
143 u32 cache_consistency_bitmask
[2];
144 /* V4 bitmask representing the subset
145 of change attribute, size, ctime
146 and mtime attributes supported by
148 u32 acl_bitmask
; /* V4 bitmask representing the ACEs
149 that are supported on this
151 u32 fh_expire_type
; /* V4 bitmask representing file
152 handle volatility type for
154 struct pnfs_layoutdriver_type
*pnfs_curr_ld
; /* Active layout driver */
155 struct rpc_wait_queue roc_rpcwaitq
;
156 void *pnfs_ld_data
; /* per mount point data */
158 /* the following fields are protected by nfs_client->cl_lock */
159 struct rb_root state_owners
;
161 struct ida openowner_id
;
162 struct ida lockowner_id
;
163 struct list_head state_owners_lru
;
164 struct list_head layouts
;
165 struct list_head delegations
;
166 void (*destroy
)(struct nfs_server
*);
168 atomic_t active
; /* Keep trace of any activity to this server */
170 /* mountd-related mount options */
171 struct sockaddr_storage mountd_address
;
172 size_t mountd_addrlen
;
174 unsigned short mountd_port
;
175 unsigned short mountd_protocol
;
178 /* Server capabilities */
179 #define NFS_CAP_READDIRPLUS (1U << 0)
180 #define NFS_CAP_HARDLINKS (1U << 1)
181 #define NFS_CAP_SYMLINKS (1U << 2)
182 #define NFS_CAP_ACLS (1U << 3)
183 #define NFS_CAP_ATOMIC_OPEN (1U << 4)
184 #define NFS_CAP_CHANGE_ATTR (1U << 5)
185 #define NFS_CAP_FILEID (1U << 6)
186 #define NFS_CAP_MODE (1U << 7)
187 #define NFS_CAP_NLINK (1U << 8)
188 #define NFS_CAP_OWNER (1U << 9)
189 #define NFS_CAP_OWNER_GROUP (1U << 10)
190 #define NFS_CAP_ATIME (1U << 11)
191 #define NFS_CAP_CTIME (1U << 12)
192 #define NFS_CAP_MTIME (1U << 13)
193 #define NFS_CAP_POSIX_LOCK (1U << 14)
194 #define NFS_CAP_UIDGID_NOMAP (1U << 15)
197 /* maximum number of slots to use */
198 #define NFS4_DEF_SLOT_TABLE_SIZE (16U)
199 #define NFS4_MAX_SLOT_TABLE (256U)
200 #define NFS4_NO_SLOT ((u32)-1)
202 #if defined(CONFIG_NFS_V4)
205 #define SLOT_TABLE_SZ DIV_ROUND_UP(NFS4_MAX_SLOT_TABLE, 8*sizeof(long))
206 struct nfs4_slot_table
{
207 struct nfs4_slot
*slots
; /* seqid per slot */
208 unsigned long used_slots
[SLOT_TABLE_SZ
]; /* used/unused bitmap */
209 spinlock_t slot_tbl_lock
;
210 struct rpc_wait_queue slot_tbl_waitq
; /* allocators may wait here */
211 u32 max_slots
; /* # slots in table */
212 u32 highest_used_slotid
; /* sent to server on each SEQ.
213 * op for dynamic resizing */
214 u32 target_max_slots
; /* Set by CB_RECALL_SLOT as
215 * the new max_slots */
216 struct completion complete
;
219 static inline int slot_idx(struct nfs4_slot_table
*tbl
, struct nfs4_slot
*sp
)
221 return sp
- tbl
->slots
;
225 * Session related parameters
227 struct nfs4_session
{
228 struct nfs4_sessionid sess_id
;
230 unsigned long session_state
;
234 /* The fore and back channel */
235 struct nfs4_channel_attrs fc_attrs
;
236 struct nfs4_slot_table fc_slot_table
;
237 struct nfs4_channel_attrs bc_attrs
;
238 struct nfs4_slot_table bc_slot_table
;
239 struct nfs_client
*clp
;
242 #endif /* CONFIG_NFS_V4 */