1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _NFS_FS_SB
3 #define _NFS_FS_SB
4 
5 #include <linux/list.h>
6 #include <linux/backing-dev.h>
7 #include <linux/idr.h>
8 #include <linux/wait.h>
9 #include <linux/nfs_xdr.h>
10 #include <linux/sunrpc/xprt.h>
11 
12 #include <linux/atomic.h>
13 #include <linux/refcount.h>
14 
15 struct nfs4_session;
16 struct nfs_iostats;
17 struct nlm_host;
18 struct nfs4_sequence_args;
19 struct nfs4_sequence_res;
20 struct nfs_server;
21 struct nfs4_minor_version_ops;
22 struct nfs41_server_scope;
23 struct nfs41_impl_id;
24 
25 /*
26  * The nfs_client identifies our client state to the server.
27  */
28 struct nfs_client {
29 	refcount_t		cl_count;
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 */
49 	size_t			cl_addrlen;
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 */
54 
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 */
59 
60 	u32			cl_minorversion;/* NFSv4 minorversion */
61 	struct rpc_cred		*cl_machine_cred;
62 
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;
68 
69 	spinlock_t		cl_lock;
70 
71 	unsigned long		cl_lease_time;
72 	unsigned long		cl_last_renewal;
73 	struct delayed_work	cl_renewd;
74 
75 	struct rpc_wait_queue	cl_rpcwaitq;
76 
77 	/* idmapper */
78 	struct idmap *		cl_idmap;
79 
80 	/* Client owner identifier */
81 	const char *		cl_owner_id;
82 
83 	u32			cl_cb_ident;	/* v4.0 callback identifier */
84 	const struct nfs4_minor_version_ops *cl_mvops;
85 	unsigned long		cl_mig_gen;
86 
87 	/* NFSv4.0 transport blocking */
88 	struct nfs4_slot_table	*cl_slot_tbl;
89 
90 	/* The sequence id to use for the next CREATE_SESSION */
91 	u32			cl_seqid;
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 */
113 
114 	/* Our own IP address, as a null-terminated string.
115 	 * This is used to generate the mv0 callback address.
116 	 */
117 	char			cl_ipaddr[48];
118 
119 #ifdef CONFIG_NFS_FSCACHE
120 	struct fscache_cookie	*fscache;	/* client index cache cookie */
121 #endif
122 
123 	struct net		*cl_net;
124 	struct list_head	pending_cb_stateids;
125 };
126 
127 /*
128  * NFS client parameters stored in the superblock.
129  */
130 struct nfs_server {
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
134 						 */
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 */
142 	unsigned int		caps;		/* server capabilities */
143 	unsigned int		rsize;		/* read size */
144 	unsigned int		rpages;		/* read size (in pages) */
145 	unsigned int		wsize;		/* write size */
146 	unsigned int		wpages;		/* write size (in pages) */
147 	unsigned int		wtmult;		/* server disk block size */
148 	unsigned int		dtsize;		/* readdir size */
149 	unsigned short		port;		/* "port=" setting */
150 	unsigned int		bsize;		/* server block size */
151 	unsigned int		acregmin;	/* attr cache timeouts */
152 	unsigned int		acregmax;
153 	unsigned int		acdirmin;
154 	unsigned int		acdirmax;
155 	unsigned int		namelen;
156 	unsigned int		options;	/* extra options enabled by mount */
157 	unsigned int		clone_blksize;	/* granularity of a CLONE operation */
158 #define NFS_OPTION_FSCACHE	0x00000001	/* - local caching enabled */
159 #define NFS_OPTION_MIGRATION	0x00000002	/* - NFSv4 migration enabled */
160 
161 	struct nfs_fsid		fsid;
162 	__u64			maxfilesize;	/* maximum file size */
163 	struct timespec		time_delta;	/* smallest time granularity */
164 	unsigned long		mount_time;	/* when this fs was mounted */
165 	struct super_block	*super;		/* VFS super block */
166 	dev_t			s_dev;		/* superblock dev numbers */
167 	struct nfs_auth_info	auth_info;	/* parsed auth flavors */
168 
169 #ifdef CONFIG_NFS_FSCACHE
170 	struct nfs_fscache_key	*fscache_key;	/* unique key for superblock */
171 	struct fscache_cookie	*fscache;	/* superblock cookie */
172 #endif
173 
174 	u32			pnfs_blksize;	/* layout_blksize attr */
175 #if IS_ENABLED(CONFIG_NFS_V4)
176 	u32			attr_bitmask[3];/* V4 bitmask representing the set
177 						   of attributes supported on this
178 						   filesystem */
179 	u32			attr_bitmask_nl[3];
180 						/* V4 bitmask representing the
181 						   set of attributes supported
182 						   on this filesystem excluding
183 						   the label support bit. */
184 	u32			exclcreat_bitmask[3];
185 						/* V4 bitmask representing the
186 						   set of attributes supported
187 						   on this filesystem for the
188 						   exclusive create. */
189 	u32			cache_consistency_bitmask[3];
190 						/* V4 bitmask representing the subset
191 						   of change attribute, size, ctime
192 						   and mtime attributes supported by
193 						   the server */
194 	u32			acl_bitmask;	/* V4 bitmask representing the ACEs
195 						   that are supported on this
196 						   filesystem */
197 	u32			fh_expire_type;	/* V4 bitmask representing file
198 						   handle volatility type for
199 						   this filesystem */
200 	struct pnfs_layoutdriver_type  *pnfs_curr_ld; /* Active layout driver */
201 	struct rpc_wait_queue	roc_rpcwaitq;
202 	void			*pnfs_ld_data;	/* per mount point data */
203 
204 	/* the following fields are protected by nfs_client->cl_lock */
205 	struct rb_root		state_owners;
206 #endif
207 	struct ida		openowner_id;
208 	struct ida		lockowner_id;
209 	struct list_head	state_owners_lru;
210 	struct list_head	layouts;
211 	struct list_head	delegations;
212 	struct list_head	ss_copies;
213 
214 	unsigned long		mig_gen;
215 	unsigned long		mig_status;
216 #define NFS_MIG_IN_TRANSITION		(1)
217 #define NFS_MIG_FAILED			(2)
218 #define NFS_MIG_TSM_POSSIBLE		(3)
219 
220 	void (*destroy)(struct nfs_server *);
221 
222 	atomic_t active; /* Keep trace of any activity to this server */
223 
224 	/* mountd-related mount options */
225 	struct sockaddr_storage	mountd_address;
226 	size_t			mountd_addrlen;
227 	u32			mountd_version;
228 	unsigned short		mountd_port;
229 	unsigned short		mountd_protocol;
230 	struct rpc_wait_queue	uoc_rpcwaitq;
231 };
232 
233 /* Server capabilities */
234 #define NFS_CAP_READDIRPLUS	(1U << 0)
235 #define NFS_CAP_HARDLINKS	(1U << 1)
236 #define NFS_CAP_SYMLINKS	(1U << 2)
237 #define NFS_CAP_ACLS		(1U << 3)
238 #define NFS_CAP_ATOMIC_OPEN	(1U << 4)
239 /* #define NFS_CAP_CHANGE_ATTR	(1U << 5) */
240 #define NFS_CAP_LGOPEN		(1U << 5)
241 #define NFS_CAP_FILEID		(1U << 6)
242 #define NFS_CAP_MODE		(1U << 7)
243 #define NFS_CAP_NLINK		(1U << 8)
244 #define NFS_CAP_OWNER		(1U << 9)
245 #define NFS_CAP_OWNER_GROUP	(1U << 10)
246 #define NFS_CAP_ATIME		(1U << 11)
247 #define NFS_CAP_CTIME		(1U << 12)
248 #define NFS_CAP_MTIME		(1U << 13)
249 #define NFS_CAP_POSIX_LOCK	(1U << 14)
250 #define NFS_CAP_UIDGID_NOMAP	(1U << 15)
251 #define NFS_CAP_STATEID_NFSV41	(1U << 16)
252 #define NFS_CAP_ATOMIC_OPEN_V1	(1U << 17)
253 #define NFS_CAP_SECURITY_LABEL	(1U << 18)
254 #define NFS_CAP_SEEK		(1U << 19)
255 #define NFS_CAP_ALLOCATE	(1U << 20)
256 #define NFS_CAP_DEALLOCATE	(1U << 21)
257 #define NFS_CAP_LAYOUTSTATS	(1U << 22)
258 #define NFS_CAP_CLONE		(1U << 23)
259 #define NFS_CAP_COPY		(1U << 24)
260 #define NFS_CAP_OFFLOAD_CANCEL	(1U << 25)
261 
262 #endif
263