1 /* SPDX-License-Identifier: GPL-2.0 */
5 #include <linux/list.h>
6 #include <linux/backing-dev.h>
8 #include <linux/wait.h>
9 #include <linux/nfs_xdr.h>
10 #include <linux/sunrpc/xprt.h>
12 #include <linux/atomic.h>
13 #include <linux/refcount.h>
18 struct nfs4_sequence_args;
19 struct nfs4_sequence_res;
21 struct nfs4_minor_version_ops;
22 struct nfs41_server_scope;
26 * The nfs_client identifies our client state to the server.
30 atomic_t cl_mds_count;
31 int cl_cons_state; /* current construction state (-ve: init error) */
32 #define NFS_CS_READY 0 /* ready to be used */
33 #define NFS_CS_INITING 1 /* busy initialising */
34 #define NFS_CS_SESSION_INITING 2 /* busy initialising session */
35 unsigned long cl_res_state; /* NFS resources state */
36 #define NFS_CS_CALLBACK 1 /* - callback started */
37 #define NFS_CS_IDMAP 2 /* - idmap started */
38 #define NFS_CS_RENEWD 3 /* - renewd started */
39 #define NFS_CS_STOP_RENEW 4 /* no more state to renew */
40 #define NFS_CS_CHECK_LEASE_TIME 5 /* need to check lease time */
41 unsigned long cl_flags; /* behavior switches */
42 #define NFS_CS_NORESVPORT 0 /* - use ephemeral src port */
43 #define NFS_CS_DISCRTRY 1 /* - disconnect on RPC retry */
44 #define NFS_CS_MIGRATION 2 /* - transparent state migr */
45 #define NFS_CS_INFINITE_SLOTS 3 /* - don't limit TCP slots */
46 #define NFS_CS_NO_RETRANS_TIMEOUT 4 /* - Disable retransmit timeouts */
47 #define NFS_CS_TSM_POSSIBLE 5 /* - Maybe state migration */
48 struct sockaddr_storage cl_addr; /* server identifier */
50 char * cl_hostname; /* hostname of server */
51 char * cl_acceptor; /* GSSAPI acceptor name */
52 struct list_head cl_share_link; /* link in global client list */
53 struct list_head cl_superblocks; /* List of nfs_server structs */
55 struct rpc_clnt * cl_rpcclient;
56 const struct nfs_rpc_ops *rpc_ops; /* NFS protocol vector */
57 int cl_proto; /* Network transport protocol */
58 struct nfs_subversion * cl_nfs_mod; /* pointer to nfs version module */
60 u32 cl_minorversion;/* NFSv4 minorversion */
61 const char * cl_principal; /* used for machine cred */
63 #if IS_ENABLED(CONFIG_NFS_V4)
64 struct list_head cl_ds_clients; /* auth flavor data servers */
65 u64 cl_clientid; /* constant */
66 nfs4_verifier cl_confirm; /* Clientid verifier */
67 unsigned long cl_state;
71 unsigned long cl_lease_time;
72 unsigned long cl_last_renewal;
73 struct delayed_work cl_renewd;
75 struct rpc_wait_queue cl_rpcwaitq;
78 struct idmap * cl_idmap;
80 /* Client owner identifier */
81 const char * cl_owner_id;
83 u32 cl_cb_ident; /* v4.0 callback identifier */
84 const struct nfs4_minor_version_ops *cl_mvops;
85 unsigned long cl_mig_gen;
87 /* NFSv4.0 transport blocking */
88 struct nfs4_slot_table *cl_slot_tbl;
90 /* The sequence id to use for the next CREATE_SESSION */
92 /* The flags used for obtaining the clientid during EXCHANGE_ID */
93 u32 cl_exchange_flags;
94 struct nfs4_session *cl_session; /* shared session */
95 bool cl_preserve_clid;
96 struct nfs41_server_owner *cl_serverowner;
97 struct nfs41_server_scope *cl_serverscope;
98 struct nfs41_impl_id *cl_implid;
99 /* nfs 4.1+ state protection modes: */
100 unsigned long cl_sp4_flags;
101 #define NFS_SP4_MACH_CRED_MINIMAL 1 /* Minimal sp4_mach_cred - state ops
102 * must use machine cred */
103 #define NFS_SP4_MACH_CRED_CLEANUP 2 /* CLOSE and LOCKU */
104 #define NFS_SP4_MACH_CRED_SECINFO 3 /* SECINFO and SECINFO_NO_NAME */
105 #define NFS_SP4_MACH_CRED_STATEID 4 /* TEST_STATEID and FREE_STATEID */
106 #define NFS_SP4_MACH_CRED_WRITE 5 /* WRITE */
107 #define NFS_SP4_MACH_CRED_COMMIT 6 /* COMMIT */
108 #define NFS_SP4_MACH_CRED_PNFS_CLEANUP 7 /* LAYOUTRETURN */
109 #if IS_ENABLED(CONFIG_NFS_V4_1)
110 wait_queue_head_t cl_lock_waitq;
111 #endif /* CONFIG_NFS_V4_1 */
112 #endif /* CONFIG_NFS_V4 */
114 /* Our own IP address, as a null-terminated string.
115 * This is used to generate the mv0 callback address.
119 #ifdef CONFIG_NFS_FSCACHE
120 struct fscache_cookie *fscache; /* client index cache cookie */
124 struct list_head pending_cb_stateids;
128 * NFS client parameters stored in the superblock.
131 struct nfs_client * nfs_client; /* shared client and NFS4 state */
132 struct list_head client_link; /* List of other nfs_server structs
133 * that share the same client
135 struct list_head master_link; /* link in master servers list */
136 struct rpc_clnt * client; /* RPC client handle */
137 struct rpc_clnt * client_acl; /* ACL RPC client handle */
138 struct nlm_host *nlm_host; /* NLM client handle */
139 struct nfs_iostats __percpu *io_stats; /* I/O statistics */
140 atomic_long_t writeback; /* number of writeback pages */
141 int flags; /* various flags */
143 /* The following are for internal use only. Also see uapi/linux/nfs_mount.h */
144 #define NFS_MOUNT_LOOKUP_CACHE_NONEG 0x10000
145 #define NFS_MOUNT_LOOKUP_CACHE_NONE 0x20000
146 #define NFS_MOUNT_NORESVPORT 0x40000
147 #define NFS_MOUNT_LEGACY_INTERFACE 0x80000
148 #define NFS_MOUNT_LOCAL_FLOCK 0x100000
149 #define NFS_MOUNT_LOCAL_FCNTL 0x200000
150 #define NFS_MOUNT_SOFTERR 0x400000
152 unsigned int caps; /* server capabilities */
153 unsigned int rsize; /* read size */
154 unsigned int rpages; /* read size (in pages) */
155 unsigned int wsize; /* write size */
156 unsigned int wpages; /* write size (in pages) */
157 unsigned int wtmult; /* server disk block size */
158 unsigned int dtsize; /* readdir size */
159 unsigned short port; /* "port=" setting */
160 unsigned int bsize; /* server block size */
161 unsigned int acregmin; /* attr cache timeouts */
162 unsigned int acregmax;
163 unsigned int acdirmin;
164 unsigned int acdirmax;
165 unsigned int namelen;
166 unsigned int options; /* extra options enabled by mount */
167 unsigned int clone_blksize; /* granularity of a CLONE operation */
168 #define NFS_OPTION_FSCACHE 0x00000001 /* - local caching enabled */
169 #define NFS_OPTION_MIGRATION 0x00000002 /* - NFSv4 migration enabled */
171 struct nfs_fsid fsid;
172 __u64 maxfilesize; /* maximum file size */
173 struct timespec time_delta; /* smallest time granularity */
174 unsigned long mount_time; /* when this fs was mounted */
175 struct super_block *super; /* VFS super block */
176 dev_t s_dev; /* superblock dev numbers */
177 struct nfs_auth_info auth_info; /* parsed auth flavors */
179 #ifdef CONFIG_NFS_FSCACHE
180 struct nfs_fscache_key *fscache_key; /* unique key for superblock */
181 struct fscache_cookie *fscache; /* superblock cookie */
184 u32 pnfs_blksize; /* layout_blksize attr */
185 #if IS_ENABLED(CONFIG_NFS_V4)
186 u32 attr_bitmask[3];/* V4 bitmask representing the set
187 of attributes supported on this
189 u32 attr_bitmask_nl[3];
190 /* V4 bitmask representing the
191 set of attributes supported
192 on this filesystem excluding
193 the label support bit. */
194 u32 exclcreat_bitmask[3];
195 /* V4 bitmask representing the
196 set of attributes supported
197 on this filesystem for the
199 u32 cache_consistency_bitmask[3];
200 /* V4 bitmask representing the subset
201 of change attribute, size, ctime
202 and mtime attributes supported by
204 u32 acl_bitmask; /* V4 bitmask representing the ACEs
205 that are supported on this
207 u32 fh_expire_type; /* V4 bitmask representing file
208 handle volatility type for
210 struct pnfs_layoutdriver_type *pnfs_curr_ld; /* Active layout driver */
211 struct rpc_wait_queue roc_rpcwaitq;
212 void *pnfs_ld_data; /* per mount point data */
214 /* the following fields are protected by nfs_client->cl_lock */
215 struct rb_root state_owners;
217 struct ida openowner_id;
218 struct ida lockowner_id;
219 struct list_head state_owners_lru;
220 struct list_head layouts;
221 struct list_head delegations;
222 struct list_head ss_copies;
224 unsigned long mig_gen;
225 unsigned long mig_status;
226 #define NFS_MIG_IN_TRANSITION (1)
227 #define NFS_MIG_FAILED (2)
228 #define NFS_MIG_TSM_POSSIBLE (3)
230 void (*destroy)(struct nfs_server *);
232 atomic_t active; /* Keep trace of any activity to this server */
234 /* mountd-related mount options */
235 struct sockaddr_storage mountd_address;
236 size_t mountd_addrlen;
238 unsigned short mountd_port;
239 unsigned short mountd_protocol;
240 struct rpc_wait_queue uoc_rpcwaitq;
242 /* XDR related information */
243 unsigned int read_hdrsize;
245 /* User namespace info */
246 const struct cred *cred;
249 /* Server capabilities */
250 #define NFS_CAP_READDIRPLUS (1U << 0)
251 #define NFS_CAP_HARDLINKS (1U << 1)
252 #define NFS_CAP_SYMLINKS (1U << 2)
253 #define NFS_CAP_ACLS (1U << 3)
254 #define NFS_CAP_ATOMIC_OPEN (1U << 4)
255 /* #define NFS_CAP_CHANGE_ATTR (1U << 5) */
256 #define NFS_CAP_LGOPEN (1U << 5)
257 #define NFS_CAP_FILEID (1U << 6)
258 #define NFS_CAP_MODE (1U << 7)
259 #define NFS_CAP_NLINK (1U << 8)
260 #define NFS_CAP_OWNER (1U << 9)
261 #define NFS_CAP_OWNER_GROUP (1U << 10)
262 #define NFS_CAP_ATIME (1U << 11)
263 #define NFS_CAP_CTIME (1U << 12)
264 #define NFS_CAP_MTIME (1U << 13)
265 #define NFS_CAP_POSIX_LOCK (1U << 14)
266 #define NFS_CAP_UIDGID_NOMAP (1U << 15)
267 #define NFS_CAP_STATEID_NFSV41 (1U << 16)
268 #define NFS_CAP_ATOMIC_OPEN_V1 (1U << 17)
269 #define NFS_CAP_SECURITY_LABEL (1U << 18)
270 #define NFS_CAP_SEEK (1U << 19)
271 #define NFS_CAP_ALLOCATE (1U << 20)
272 #define NFS_CAP_DEALLOCATE (1U << 21)
273 #define NFS_CAP_LAYOUTSTATS (1U << 22)
274 #define NFS_CAP_CLONE (1U << 23)
275 #define NFS_CAP_COPY (1U << 24)
276 #define NFS_CAP_OFFLOAD_CANCEL (1U << 25)
277 #define NFS_CAP_LAYOUTERROR (1U << 26)