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 #define NFS_CS_MIGRATION 2 /* - transparent state migr */
43 struct sockaddr_storage cl_addr
; /* server identifier */
45 char * cl_hostname
; /* hostname of server */
46 struct list_head cl_share_link
; /* link in global client list */
47 struct list_head cl_superblocks
; /* List of nfs_server structs */
49 struct rpc_clnt
* cl_rpcclient
;
50 const struct nfs_rpc_ops
*rpc_ops
; /* NFS protocol vector */
51 int cl_proto
; /* Network transport protocol */
52 struct nfs_subversion
* cl_nfs_mod
; /* pointer to nfs version module */
54 u32 cl_minorversion
;/* NFSv4 minorversion */
55 struct rpc_cred
*cl_machine_cred
;
57 #if IS_ENABLED(CONFIG_NFS_V4)
58 u64 cl_clientid
; /* constant */
59 nfs4_verifier cl_confirm
; /* Clientid verifier */
60 unsigned long cl_state
;
64 unsigned long cl_lease_time
;
65 unsigned long cl_last_renewal
;
66 struct delayed_work cl_renewd
;
68 struct rpc_wait_queue cl_rpcwaitq
;
71 struct idmap
* cl_idmap
;
73 /* Our own IP address, as a null-terminated string.
74 * This is used to generate the mv0 callback address.
77 u32 cl_cb_ident
; /* v4.0 callback identifier */
78 const struct nfs4_minor_version_ops
*cl_mvops
;
80 /* The sequence id to use for the next CREATE_SESSION */
82 /* The flags used for obtaining the clientid during EXCHANGE_ID */
83 u32 cl_exchange_flags
;
84 struct nfs4_session
*cl_session
; /* shared session */
85 struct nfs41_server_owner
*cl_serverowner
;
86 struct nfs41_server_scope
*cl_serverscope
;
87 struct nfs41_impl_id
*cl_implid
;
88 #endif /* CONFIG_NFS_V4 */
90 #ifdef CONFIG_NFS_FSCACHE
91 struct fscache_cookie
*fscache
; /* client index cache cookie */
98 * NFS client parameters stored in the superblock.
101 struct nfs_client
* nfs_client
; /* shared client and NFS4 state */
102 struct list_head client_link
; /* List of other nfs_server structs
103 * that share the same client
105 struct list_head master_link
; /* link in master servers list */
106 struct rpc_clnt
* client
; /* RPC client handle */
107 struct rpc_clnt
* client_acl
; /* ACL RPC client handle */
108 struct nlm_host
*nlm_host
; /* NLM client handle */
109 struct nfs_iostats __percpu
*io_stats
; /* I/O statistics */
110 struct backing_dev_info backing_dev_info
;
111 atomic_long_t writeback
; /* number of writeback pages */
112 int flags
; /* various flags */
113 unsigned int caps
; /* server capabilities */
114 unsigned int rsize
; /* read size */
115 unsigned int rpages
; /* read size (in pages) */
116 unsigned int wsize
; /* write size */
117 unsigned int wpages
; /* write size (in pages) */
118 unsigned int wtmult
; /* server disk block size */
119 unsigned int dtsize
; /* readdir size */
120 unsigned short port
; /* "port=" setting */
121 unsigned int bsize
; /* server block size */
122 unsigned int acregmin
; /* attr cache timeouts */
123 unsigned int acregmax
;
124 unsigned int acdirmin
;
125 unsigned int acdirmax
;
126 unsigned int namelen
;
127 unsigned int options
; /* extra options enabled by mount */
128 #define NFS_OPTION_FSCACHE 0x00000001 /* - local caching enabled */
129 #define NFS_OPTION_MIGRATION 0x00000002 /* - NFSv4 migration enabled */
131 struct nfs_fsid fsid
;
132 __u64 maxfilesize
; /* maximum file size */
133 struct timespec time_delta
; /* smallest time granularity */
134 unsigned long mount_time
; /* when this fs was mounted */
135 dev_t s_dev
; /* superblock dev numbers */
137 #ifdef CONFIG_NFS_FSCACHE
138 struct nfs_fscache_key
*fscache_key
; /* unique key for superblock */
139 struct fscache_cookie
*fscache
; /* superblock cookie */
142 u32 pnfs_blksize
; /* layout_blksize attr */
143 #if IS_ENABLED(CONFIG_NFS_V4)
144 u32 attr_bitmask
[3];/* V4 bitmask representing the set
145 of attributes supported on this
147 u32 cache_consistency_bitmask
[2];
148 /* V4 bitmask representing the subset
149 of change attribute, size, ctime
150 and mtime attributes supported by
152 u32 acl_bitmask
; /* V4 bitmask representing the ACEs
153 that are supported on this
155 u32 fh_expire_type
; /* V4 bitmask representing file
156 handle volatility type for
158 struct pnfs_layoutdriver_type
*pnfs_curr_ld
; /* Active layout driver */
159 struct rpc_wait_queue roc_rpcwaitq
;
160 void *pnfs_ld_data
; /* per mount point data */
162 /* the following fields are protected by nfs_client->cl_lock */
163 struct rb_root state_owners
;
165 struct ida openowner_id
;
166 struct ida lockowner_id
;
167 struct list_head state_owners_lru
;
168 struct list_head layouts
;
169 struct list_head delegations
;
170 void (*destroy
)(struct nfs_server
*);
172 atomic_t active
; /* Keep trace of any activity to this server */
174 /* mountd-related mount options */
175 struct sockaddr_storage mountd_address
;
176 size_t mountd_addrlen
;
178 unsigned short mountd_port
;
179 unsigned short mountd_protocol
;
182 /* Server capabilities */
183 #define NFS_CAP_READDIRPLUS (1U << 0)
184 #define NFS_CAP_HARDLINKS (1U << 1)
185 #define NFS_CAP_SYMLINKS (1U << 2)
186 #define NFS_CAP_ACLS (1U << 3)
187 #define NFS_CAP_ATOMIC_OPEN (1U << 4)
188 #define NFS_CAP_CHANGE_ATTR (1U << 5)
189 #define NFS_CAP_FILEID (1U << 6)
190 #define NFS_CAP_MODE (1U << 7)
191 #define NFS_CAP_NLINK (1U << 8)
192 #define NFS_CAP_OWNER (1U << 9)
193 #define NFS_CAP_OWNER_GROUP (1U << 10)
194 #define NFS_CAP_ATIME (1U << 11)
195 #define NFS_CAP_CTIME (1U << 12)
196 #define NFS_CAP_MTIME (1U << 13)
197 #define NFS_CAP_POSIX_LOCK (1U << 14)
198 #define NFS_CAP_UIDGID_NOMAP (1U << 15)
201 /* maximum number of slots to use */
202 #define NFS4_DEF_SLOT_TABLE_SIZE (16U)
203 #define NFS4_MAX_SLOT_TABLE (256U)
204 #define NFS4_NO_SLOT ((u32)-1)
206 #if IS_ENABLED(CONFIG_NFS_V4)
209 #define SLOT_TABLE_SZ DIV_ROUND_UP(NFS4_MAX_SLOT_TABLE, 8*sizeof(long))
210 struct nfs4_slot_table
{
211 struct nfs4_slot
*slots
; /* seqid per slot */
212 unsigned long used_slots
[SLOT_TABLE_SZ
]; /* used/unused bitmap */
213 spinlock_t slot_tbl_lock
;
214 struct rpc_wait_queue slot_tbl_waitq
; /* allocators may wait here */
215 u32 max_slots
; /* # slots in table */
216 u32 highest_used_slotid
; /* sent to server on each SEQ.
217 * op for dynamic resizing */
218 u32 target_max_slots
; /* Set by CB_RECALL_SLOT as
219 * the new max_slots */
220 struct completion complete
;
223 static inline int slot_idx(struct nfs4_slot_table
*tbl
, struct nfs4_slot
*sp
)
225 return sp
- tbl
->slots
;
229 * Session related parameters
231 struct nfs4_session
{
232 struct nfs4_sessionid sess_id
;
234 unsigned long session_state
;
238 /* The fore and back channel */
239 struct nfs4_channel_attrs fc_attrs
;
240 struct nfs4_slot_table fc_slot_table
;
241 struct nfs4_channel_attrs bc_attrs
;
242 struct nfs4_slot_table bc_slot_table
;
243 struct nfs_client
*clp
;
246 #endif /* CONFIG_NFS_V4 */