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 #define NFS_CS_NOPING 6 /* - don't ping on connect */
49 #define NFS_CS_DS 7 /* - Server is a DS */
50 #define NFS_CS_REUSEPORT 8 /* - reuse src port on reconnect */
51 struct sockaddr_storage cl_addr; /* server identifier */
53 char * cl_hostname; /* hostname of server */
54 char * cl_acceptor; /* GSSAPI acceptor name */
55 struct list_head cl_share_link; /* link in global client list */
56 struct list_head cl_superblocks; /* List of nfs_server structs */
58 struct rpc_clnt * cl_rpcclient;
59 const struct nfs_rpc_ops *rpc_ops; /* NFS protocol vector */
60 int cl_proto; /* Network transport protocol */
61 struct nfs_subversion * cl_nfs_mod; /* pointer to nfs version module */
63 u32 cl_minorversion;/* NFSv4 minorversion */
64 unsigned int cl_nconnect; /* Number of connections */
65 unsigned int cl_max_connect; /* max number of xprts allowed */
66 const char * cl_principal; /* used for machine cred */
68 #if IS_ENABLED(CONFIG_NFS_V4)
69 struct list_head cl_ds_clients; /* auth flavor data servers */
70 u64 cl_clientid; /* constant */
71 nfs4_verifier cl_confirm; /* Clientid verifier */
72 unsigned long cl_state;
76 unsigned long cl_lease_time;
77 unsigned long cl_last_renewal;
78 struct delayed_work cl_renewd;
80 struct rpc_wait_queue cl_rpcwaitq;
83 struct idmap * cl_idmap;
85 /* Client owner identifier */
86 const char * cl_owner_id;
88 u32 cl_cb_ident; /* v4.0 callback identifier */
89 const struct nfs4_minor_version_ops *cl_mvops;
90 unsigned long cl_mig_gen;
92 /* NFSv4.0 transport blocking */
93 struct nfs4_slot_table *cl_slot_tbl;
95 /* The sequence id to use for the next CREATE_SESSION */
97 /* The flags used for obtaining the clientid during EXCHANGE_ID */
98 u32 cl_exchange_flags;
99 struct nfs4_session *cl_session; /* shared session */
100 bool cl_preserve_clid;
101 struct nfs41_server_owner *cl_serverowner;
102 struct nfs41_server_scope *cl_serverscope;
103 struct nfs41_impl_id *cl_implid;
104 /* nfs 4.1+ state protection modes: */
105 unsigned long cl_sp4_flags;
106 #define NFS_SP4_MACH_CRED_MINIMAL 1 /* Minimal sp4_mach_cred - state ops
107 * must use machine cred */
108 #define NFS_SP4_MACH_CRED_CLEANUP 2 /* CLOSE and LOCKU */
109 #define NFS_SP4_MACH_CRED_SECINFO 3 /* SECINFO and SECINFO_NO_NAME */
110 #define NFS_SP4_MACH_CRED_STATEID 4 /* TEST_STATEID and FREE_STATEID */
111 #define NFS_SP4_MACH_CRED_WRITE 5 /* WRITE */
112 #define NFS_SP4_MACH_CRED_COMMIT 6 /* COMMIT */
113 #define NFS_SP4_MACH_CRED_PNFS_CLEANUP 7 /* LAYOUTRETURN */
114 #if IS_ENABLED(CONFIG_NFS_V4_1)
115 wait_queue_head_t cl_lock_waitq;
116 #endif /* CONFIG_NFS_V4_1 */
117 #endif /* CONFIG_NFS_V4 */
119 /* Our own IP address, as a null-terminated string.
120 * This is used to generate the mv0 callback address.
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 unsigned int write_congested;/* flag set when writeback gets too high */
142 unsigned int flags; /* various flags */
144 /* The following are for internal use only. Also see uapi/linux/nfs_mount.h */
145 #define NFS_MOUNT_LOOKUP_CACHE_NONEG 0x10000
146 #define NFS_MOUNT_LOOKUP_CACHE_NONE 0x20000
147 #define NFS_MOUNT_NORESVPORT 0x40000
148 #define NFS_MOUNT_LEGACY_INTERFACE 0x80000
149 #define NFS_MOUNT_LOCAL_FLOCK 0x100000
150 #define NFS_MOUNT_LOCAL_FCNTL 0x200000
151 #define NFS_MOUNT_SOFTERR 0x400000
152 #define NFS_MOUNT_SOFTREVAL 0x800000
153 #define NFS_MOUNT_WRITE_EAGER 0x01000000
154 #define NFS_MOUNT_WRITE_WAIT 0x02000000
155 #define NFS_MOUNT_TRUNK_DISCOVERY 0x04000000
157 unsigned int fattr_valid; /* Valid attributes */
158 unsigned int caps; /* server capabilities */
159 unsigned int rsize; /* read size */
160 unsigned int rpages; /* read size (in pages) */
161 unsigned int wsize; /* write size */
162 unsigned int wpages; /* write size (in pages) */
163 unsigned int wtmult; /* server disk block size */
164 unsigned int dtsize; /* readdir size */
165 unsigned short port; /* "port=" setting */
166 unsigned int bsize; /* server block size */
167 #ifdef CONFIG_NFS_V4_2
168 unsigned int gxasize; /* getxattr size */
169 unsigned int sxasize; /* setxattr size */
170 unsigned int lxasize; /* listxattr size */
172 unsigned int acregmin; /* attr cache timeouts */
173 unsigned int acregmax;
174 unsigned int acdirmin;
175 unsigned int acdirmax;
176 unsigned int namelen;
177 unsigned int options; /* extra options enabled by mount */
178 unsigned int clone_blksize; /* granularity of a CLONE operation */
179 #define NFS_OPTION_FSCACHE 0x00000001 /* - local caching enabled */
180 #define NFS_OPTION_MIGRATION 0x00000002 /* - NFSv4 migration enabled */
182 enum nfs4_change_attr_type
183 change_attr_type;/* Description of change attribute */
185 struct nfs_fsid fsid;
186 __u64 maxfilesize; /* maximum file size */
187 struct timespec64 time_delta; /* smallest time granularity */
188 unsigned long mount_time; /* when this fs was mounted */
189 struct super_block *super; /* VFS super block */
190 dev_t s_dev; /* superblock dev numbers */
191 struct nfs_auth_info auth_info; /* parsed auth flavors */
193 #ifdef CONFIG_NFS_FSCACHE
194 struct fscache_volume *fscache; /* superblock cookie */
195 char *fscache_uniq; /* Uniquifier (or NULL) */
198 u32 pnfs_blksize; /* layout_blksize attr */
199 #if IS_ENABLED(CONFIG_NFS_V4)
200 u32 attr_bitmask[3];/* V4 bitmask representing the set
201 of attributes supported on this
203 u32 attr_bitmask_nl[3];
204 /* V4 bitmask representing the
205 set of attributes supported
206 on this filesystem excluding
207 the label support bit. */
208 u32 exclcreat_bitmask[3];
209 /* V4 bitmask representing the
210 set of attributes supported
211 on this filesystem for the
213 u32 cache_consistency_bitmask[3];
214 /* V4 bitmask representing the subset
215 of change attribute, size, ctime
216 and mtime attributes supported by
218 u32 acl_bitmask; /* V4 bitmask representing the ACEs
219 that are supported on this
221 u32 fh_expire_type; /* V4 bitmask representing file
222 handle volatility type for
224 struct pnfs_layoutdriver_type *pnfs_curr_ld; /* Active layout driver */
225 struct rpc_wait_queue roc_rpcwaitq;
226 void *pnfs_ld_data; /* per mount point data */
228 /* the following fields are protected by nfs_client->cl_lock */
229 struct rb_root state_owners;
231 struct ida openowner_id;
232 struct ida lockowner_id;
233 struct list_head state_owners_lru;
234 struct list_head layouts;
235 struct list_head delegations;
236 struct list_head ss_copies;
238 unsigned long mig_gen;
239 unsigned long mig_status;
240 #define NFS_MIG_IN_TRANSITION (1)
241 #define NFS_MIG_FAILED (2)
242 #define NFS_MIG_TSM_POSSIBLE (3)
244 void (*destroy)(struct nfs_server *);
246 atomic_t active; /* Keep trace of any activity to this server */
248 /* mountd-related mount options */
249 struct sockaddr_storage mountd_address;
250 size_t mountd_addrlen;
252 unsigned short mountd_port;
253 unsigned short mountd_protocol;
254 struct rpc_wait_queue uoc_rpcwaitq;
256 /* XDR related information */
257 unsigned int read_hdrsize;
259 /* User namespace info */
260 const struct cred *cred;
261 bool has_sec_mnt_opts;
264 /* Server capabilities */
265 #define NFS_CAP_READDIRPLUS (1U << 0)
266 #define NFS_CAP_HARDLINKS (1U << 1)
267 #define NFS_CAP_SYMLINKS (1U << 2)
268 #define NFS_CAP_ACLS (1U << 3)
269 #define NFS_CAP_ATOMIC_OPEN (1U << 4)
270 #define NFS_CAP_LGOPEN (1U << 5)
271 #define NFS_CAP_CASE_INSENSITIVE (1U << 6)
272 #define NFS_CAP_CASE_PRESERVING (1U << 7)
273 #define NFS_CAP_POSIX_LOCK (1U << 14)
274 #define NFS_CAP_UIDGID_NOMAP (1U << 15)
275 #define NFS_CAP_STATEID_NFSV41 (1U << 16)
276 #define NFS_CAP_ATOMIC_OPEN_V1 (1U << 17)
277 #define NFS_CAP_SECURITY_LABEL (1U << 18)
278 #define NFS_CAP_SEEK (1U << 19)
279 #define NFS_CAP_ALLOCATE (1U << 20)
280 #define NFS_CAP_DEALLOCATE (1U << 21)
281 #define NFS_CAP_LAYOUTSTATS (1U << 22)
282 #define NFS_CAP_CLONE (1U << 23)
283 #define NFS_CAP_COPY (1U << 24)
284 #define NFS_CAP_OFFLOAD_CANCEL (1U << 25)
285 #define NFS_CAP_LAYOUTERROR (1U << 26)
286 #define NFS_CAP_COPY_NOTIFY (1U << 27)
287 #define NFS_CAP_XATTR (1U << 28)
288 #define NFS_CAP_READ_PLUS (1U << 29)
289 #define NFS_CAP_FS_LOCATIONS (1U << 30)
290 #define NFS_CAP_MOVEABLE (1U << 31)