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 const char * cl_principal; /* used for machine cred */
67 #if IS_ENABLED(CONFIG_NFS_V4)
68 struct list_head cl_ds_clients; /* auth flavor data servers */
69 u64 cl_clientid; /* constant */
70 nfs4_verifier cl_confirm; /* Clientid verifier */
71 unsigned long cl_state;
75 unsigned long cl_lease_time;
76 unsigned long cl_last_renewal;
77 struct delayed_work cl_renewd;
79 struct rpc_wait_queue cl_rpcwaitq;
82 struct idmap * cl_idmap;
84 /* Client owner identifier */
85 const char * cl_owner_id;
87 u32 cl_cb_ident; /* v4.0 callback identifier */
88 const struct nfs4_minor_version_ops *cl_mvops;
89 unsigned long cl_mig_gen;
91 /* NFSv4.0 transport blocking */
92 struct nfs4_slot_table *cl_slot_tbl;
94 /* The sequence id to use for the next CREATE_SESSION */
96 /* The flags used for obtaining the clientid during EXCHANGE_ID */
97 u32 cl_exchange_flags;
98 struct nfs4_session *cl_session; /* shared session */
99 bool cl_preserve_clid;
100 struct nfs41_server_owner *cl_serverowner;
101 struct nfs41_server_scope *cl_serverscope;
102 struct nfs41_impl_id *cl_implid;
103 /* nfs 4.1+ state protection modes: */
104 unsigned long cl_sp4_flags;
105 #define NFS_SP4_MACH_CRED_MINIMAL 1 /* Minimal sp4_mach_cred - state ops
106 * must use machine cred */
107 #define NFS_SP4_MACH_CRED_CLEANUP 2 /* CLOSE and LOCKU */
108 #define NFS_SP4_MACH_CRED_SECINFO 3 /* SECINFO and SECINFO_NO_NAME */
109 #define NFS_SP4_MACH_CRED_STATEID 4 /* TEST_STATEID and FREE_STATEID */
110 #define NFS_SP4_MACH_CRED_WRITE 5 /* WRITE */
111 #define NFS_SP4_MACH_CRED_COMMIT 6 /* COMMIT */
112 #define NFS_SP4_MACH_CRED_PNFS_CLEANUP 7 /* LAYOUTRETURN */
113 #if IS_ENABLED(CONFIG_NFS_V4_1)
114 wait_queue_head_t cl_lock_waitq;
115 #endif /* CONFIG_NFS_V4_1 */
116 #endif /* CONFIG_NFS_V4 */
118 /* Our own IP address, as a null-terminated string.
119 * This is used to generate the mv0 callback address.
123 #ifdef CONFIG_NFS_FSCACHE
124 struct fscache_cookie *fscache; /* client index cache cookie */
128 struct list_head pending_cb_stateids;
132 * NFS client parameters stored in the superblock.
135 struct nfs_client * nfs_client; /* shared client and NFS4 state */
136 struct list_head client_link; /* List of other nfs_server structs
137 * that share the same client
139 struct list_head master_link; /* link in master servers list */
140 struct rpc_clnt * client; /* RPC client handle */
141 struct rpc_clnt * client_acl; /* ACL RPC client handle */
142 struct nlm_host *nlm_host; /* NLM client handle */
143 struct nfs_iostats __percpu *io_stats; /* I/O statistics */
144 atomic_long_t writeback; /* number of writeback pages */
145 unsigned int flags; /* various flags */
147 /* The following are for internal use only. Also see uapi/linux/nfs_mount.h */
148 #define NFS_MOUNT_LOOKUP_CACHE_NONEG 0x10000
149 #define NFS_MOUNT_LOOKUP_CACHE_NONE 0x20000
150 #define NFS_MOUNT_NORESVPORT 0x40000
151 #define NFS_MOUNT_LEGACY_INTERFACE 0x80000
152 #define NFS_MOUNT_LOCAL_FLOCK 0x100000
153 #define NFS_MOUNT_LOCAL_FCNTL 0x200000
154 #define NFS_MOUNT_SOFTERR 0x400000
155 #define NFS_MOUNT_SOFTREVAL 0x800000
156 #define NFS_MOUNT_WRITE_EAGER 0x01000000
157 #define NFS_MOUNT_WRITE_WAIT 0x02000000
159 unsigned int caps; /* server capabilities */
160 unsigned int rsize; /* read size */
161 unsigned int rpages; /* read size (in pages) */
162 unsigned int wsize; /* write size */
163 unsigned int wpages; /* write size (in pages) */
164 unsigned int wtmult; /* server disk block size */
165 unsigned int dtsize; /* readdir size */
166 unsigned short port; /* "port=" setting */
167 unsigned int bsize; /* server block size */
168 #ifdef CONFIG_NFS_V4_2
169 unsigned int gxasize; /* getxattr size */
170 unsigned int sxasize; /* setxattr size */
171 unsigned int lxasize; /* listxattr size */
173 unsigned int acregmin; /* attr cache timeouts */
174 unsigned int acregmax;
175 unsigned int acdirmin;
176 unsigned int acdirmax;
177 unsigned int namelen;
178 unsigned int options; /* extra options enabled by mount */
179 unsigned int clone_blksize; /* granularity of a CLONE operation */
180 #define NFS_OPTION_FSCACHE 0x00000001 /* - local caching enabled */
181 #define NFS_OPTION_MIGRATION 0x00000002 /* - NFSv4 migration enabled */
183 struct nfs_fsid fsid;
184 __u64 maxfilesize; /* maximum file size */
185 struct timespec64 time_delta; /* smallest time granularity */
186 unsigned long mount_time; /* when this fs was mounted */
187 struct super_block *super; /* VFS super block */
188 dev_t s_dev; /* superblock dev numbers */
189 struct nfs_auth_info auth_info; /* parsed auth flavors */
191 #ifdef CONFIG_NFS_FSCACHE
192 struct nfs_fscache_key *fscache_key; /* unique key for superblock */
193 struct fscache_cookie *fscache; /* superblock cookie */
196 u32 pnfs_blksize; /* layout_blksize attr */
197 #if IS_ENABLED(CONFIG_NFS_V4)
198 u32 attr_bitmask[3];/* V4 bitmask representing the set
199 of attributes supported on this
201 u32 attr_bitmask_nl[3];
202 /* V4 bitmask representing the
203 set of attributes supported
204 on this filesystem excluding
205 the label support bit. */
206 u32 exclcreat_bitmask[3];
207 /* V4 bitmask representing the
208 set of attributes supported
209 on this filesystem for the
211 u32 cache_consistency_bitmask[3];
212 /* V4 bitmask representing the subset
213 of change attribute, size, ctime
214 and mtime attributes supported by
216 u32 acl_bitmask; /* V4 bitmask representing the ACEs
217 that are supported on this
219 u32 fh_expire_type; /* V4 bitmask representing file
220 handle volatility type for
222 struct pnfs_layoutdriver_type *pnfs_curr_ld; /* Active layout driver */
223 struct rpc_wait_queue roc_rpcwaitq;
224 void *pnfs_ld_data; /* per mount point data */
226 /* the following fields are protected by nfs_client->cl_lock */
227 struct rb_root state_owners;
229 struct ida openowner_id;
230 struct ida lockowner_id;
231 struct list_head state_owners_lru;
232 struct list_head layouts;
233 struct list_head delegations;
234 struct list_head ss_copies;
236 unsigned long mig_gen;
237 unsigned long mig_status;
238 #define NFS_MIG_IN_TRANSITION (1)
239 #define NFS_MIG_FAILED (2)
240 #define NFS_MIG_TSM_POSSIBLE (3)
242 void (*destroy)(struct nfs_server *);
244 atomic_t active; /* Keep trace of any activity to this server */
246 /* mountd-related mount options */
247 struct sockaddr_storage mountd_address;
248 size_t mountd_addrlen;
250 unsigned short mountd_port;
251 unsigned short mountd_protocol;
252 struct rpc_wait_queue uoc_rpcwaitq;
254 /* XDR related information */
255 unsigned int read_hdrsize;
257 /* User namespace info */
258 const struct cred *cred;
259 bool has_sec_mnt_opts;
262 /* Server capabilities */
263 #define NFS_CAP_READDIRPLUS (1U << 0)
264 #define NFS_CAP_HARDLINKS (1U << 1)
265 #define NFS_CAP_SYMLINKS (1U << 2)
266 #define NFS_CAP_ACLS (1U << 3)
267 #define NFS_CAP_ATOMIC_OPEN (1U << 4)
268 /* #define NFS_CAP_CHANGE_ATTR (1U << 5) */
269 #define NFS_CAP_LGOPEN (1U << 5)
270 #define NFS_CAP_FILEID (1U << 6)
271 #define NFS_CAP_MODE (1U << 7)
272 #define NFS_CAP_NLINK (1U << 8)
273 #define NFS_CAP_OWNER (1U << 9)
274 #define NFS_CAP_OWNER_GROUP (1U << 10)
275 #define NFS_CAP_ATIME (1U << 11)
276 #define NFS_CAP_CTIME (1U << 12)
277 #define NFS_CAP_MTIME (1U << 13)
278 #define NFS_CAP_POSIX_LOCK (1U << 14)
279 #define NFS_CAP_UIDGID_NOMAP (1U << 15)
280 #define NFS_CAP_STATEID_NFSV41 (1U << 16)
281 #define NFS_CAP_ATOMIC_OPEN_V1 (1U << 17)
282 #define NFS_CAP_SECURITY_LABEL (1U << 18)
283 #define NFS_CAP_SEEK (1U << 19)
284 #define NFS_CAP_ALLOCATE (1U << 20)
285 #define NFS_CAP_DEALLOCATE (1U << 21)
286 #define NFS_CAP_LAYOUTSTATS (1U << 22)
287 #define NFS_CAP_CLONE (1U << 23)
288 #define NFS_CAP_COPY (1U << 24)
289 #define NFS_CAP_OFFLOAD_CANCEL (1U << 25)
290 #define NFS_CAP_LAYOUTERROR (1U << 26)
291 #define NFS_CAP_COPY_NOTIFY (1U << 27)
292 #define NFS_CAP_XATTR (1U << 28)
293 #define NFS_CAP_READ_PLUS (1U << 29)