[linux-2.6-block.git] / include / linux / nfs_fs_sb.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _NFS_FS_SB
#define _NFS_FS_SB

#include <linux/list.h>
#include <linux/backing-dev.h>
#include <linux/idr.h>
#include <linux/wait.h>
#include <linux/nfs_xdr.h>
#include <linux/sunrpc/xprt.h>

#include <linux/atomic.h>
#include <linux/refcount.h>

struct nfs4_session;
struct nfs_iostats;
struct nlm_host;
struct nfs4_sequence_args;
struct nfs4_sequence_res;
struct nfs_server;
struct nfs4_minor_version_ops;
struct nfs41_server_scope;
struct nfs41_impl_id;

/*
 * The nfs_client identifies our client state to the server.
 */
struct nfs_client {
	refcount_t		cl_count;
	atomic_t		cl_mds_count;
	int			cl_cons_state;	/* current construction state (-ve: init error) */
#define NFS_CS_READY		0		/* ready to be used */
#define NFS_CS_INITING		1		/* busy initialising */
#define NFS_CS_SESSION_INITING	2		/* busy initialising  session */
	unsigned long		cl_res_state;	/* NFS resources state */
#define NFS_CS_CALLBACK		1		/* - callback started */
#define NFS_CS_IDMAP		2		/* - idmap started */
#define NFS_CS_RENEWD		3		/* - renewd started */
#define NFS_CS_STOP_RENEW	4		/* no more state to renew */
#define NFS_CS_CHECK_LEASE_TIME	5		/* need to check lease time */
	unsigned long		cl_flags;	/* behavior switches */
#define NFS_CS_NORESVPORT	0		/* - use ephemeral src port */
#define NFS_CS_DISCRTRY		1		/* - disconnect on RPC retry */
#define NFS_CS_MIGRATION	2		/* - transparent state migr */
#define NFS_CS_INFINITE_SLOTS	3		/* - don't limit TCP slots */
#define NFS_CS_NO_RETRANS_TIMEOUT	4	/* - Disable retransmit timeouts */
#define NFS_CS_TSM_POSSIBLE	5		/* - Maybe state migration */
#define NFS_CS_NOPING		6		/* - don't ping on connect */
#define NFS_CS_DS		7		/* - Server is a DS */
#define NFS_CS_REUSEPORT	8		/* - reuse src port on reconnect */
	struct sockaddr_storage	cl_addr;	/* server identifier */
	size_t			cl_addrlen;
	char *			cl_hostname;	/* hostname of server */
	char *			cl_acceptor;	/* GSSAPI acceptor name */
	struct list_head	cl_share_link;	/* link in global client list */
	struct list_head	cl_superblocks;	/* List of nfs_server structs */

	struct rpc_clnt *	cl_rpcclient;
	const struct nfs_rpc_ops *rpc_ops;	/* NFS protocol vector */
	int			cl_proto;	/* Network transport protocol */
	struct nfs_subversion *	cl_nfs_mod;	/* pointer to nfs version module */

	u32			cl_minorversion;/* NFSv4 minorversion */
	unsigned int		cl_nconnect;	/* Number of connections */
	const char *		cl_principal;  /* used for machine cred */

#if IS_ENABLED(CONFIG_NFS_V4)
	struct list_head	cl_ds_clients; /* auth flavor data servers */
	u64			cl_clientid;	/* constant */
	nfs4_verifier		cl_confirm;	/* Clientid verifier */
	unsigned long		cl_state;

	spinlock_t		cl_lock;

	unsigned long		cl_lease_time;
	unsigned long		cl_last_renewal;
	struct delayed_work	cl_renewd;

	struct rpc_wait_queue	cl_rpcwaitq;

	/* idmapper */
	struct idmap *		cl_idmap;

	/* Client owner identifier */
	const char *		cl_owner_id;

	u32			cl_cb_ident;	/* v4.0 callback identifier */
	const struct nfs4_minor_version_ops *cl_mvops;
	unsigned long		cl_mig_gen;

	/* NFSv4.0 transport blocking */
	struct nfs4_slot_table	*cl_slot_tbl;

	/* The sequence id to use for the next CREATE_SESSION */
	u32			cl_seqid;
	/* The flags used for obtaining the clientid during EXCHANGE_ID */
	u32			cl_exchange_flags;
	struct nfs4_session	*cl_session;	/* shared session */
	bool			cl_preserve_clid;
	struct nfs41_server_owner *cl_serverowner;
	struct nfs41_server_scope *cl_serverscope;
	struct nfs41_impl_id	*cl_implid;
	/* nfs 4.1+ state protection modes: */
	unsigned long		cl_sp4_flags;
#define NFS_SP4_MACH_CRED_MINIMAL  1	/* Minimal sp4_mach_cred - state ops
					 * must use machine cred */
#define NFS_SP4_MACH_CRED_CLEANUP  2	/* CLOSE and LOCKU */
#define NFS_SP4_MACH_CRED_SECINFO  3	/* SECINFO and SECINFO_NO_NAME */
#define NFS_SP4_MACH_CRED_STATEID  4	/* TEST_STATEID and FREE_STATEID */
#define NFS_SP4_MACH_CRED_WRITE    5	/* WRITE */
#define NFS_SP4_MACH_CRED_COMMIT   6	/* COMMIT */
#define NFS_SP4_MACH_CRED_PNFS_CLEANUP  7 /* LAYOUTRETURN */
#if IS_ENABLED(CONFIG_NFS_V4_1)
	wait_queue_head_t	cl_lock_waitq;
#endif /* CONFIG_NFS_V4_1 */
#endif /* CONFIG_NFS_V4 */

	/* Our own IP address, as a null-terminated string.
	 * This is used to generate the mv0 callback address.
	 */
	char			cl_ipaddr[48];

#ifdef CONFIG_NFS_FSCACHE
	struct fscache_cookie	*fscache;	/* client index cache cookie */
#endif

	struct net		*cl_net;
	struct list_head	pending_cb_stateids;
};

/*
 * NFS client parameters stored in the superblock.
 */
struct nfs_server {
	struct nfs_client *	nfs_client;	/* shared client and NFS4 state */
	struct list_head	client_link;	/* List of other nfs_server structs
						 * that share the same client
						 */
	struct list_head	master_link;	/* link in master servers list */
	struct rpc_clnt *	client;		/* RPC client handle */
	struct rpc_clnt *	client_acl;	/* ACL RPC client handle */
	struct nlm_host		*nlm_host;	/* NLM client handle */
	struct nfs_iostats __percpu *io_stats;	/* I/O statistics */
	atomic_long_t		writeback;	/* number of writeback pages */
	unsigned int		flags;		/* various flags */

/* The following are for internal use only. Also see uapi/linux/nfs_mount.h */
#define NFS_MOUNT_LOOKUP_CACHE_NONEG	0x10000
#define NFS_MOUNT_LOOKUP_CACHE_NONE	0x20000
#define NFS_MOUNT_NORESVPORT		0x40000
#define NFS_MOUNT_LEGACY_INTERFACE	0x80000
#define NFS_MOUNT_LOCAL_FLOCK		0x100000
#define NFS_MOUNT_LOCAL_FCNTL		0x200000
#define NFS_MOUNT_SOFTERR		0x400000
#define NFS_MOUNT_SOFTREVAL		0x800000
#define NFS_MOUNT_WRITE_EAGER		0x01000000
#define NFS_MOUNT_WRITE_WAIT		0x02000000

	unsigned int		caps;		/* server capabilities */
	unsigned int		rsize;		/* read size */
	unsigned int		rpages;		/* read size (in pages) */
	unsigned int		wsize;		/* write size */
	unsigned int		wpages;		/* write size (in pages) */
	unsigned int		wtmult;		/* server disk block size */
	unsigned int		dtsize;		/* readdir size */
	unsigned short		port;		/* "port=" setting */
	unsigned int		bsize;		/* server block size */
#ifdef CONFIG_NFS_V4_2
	unsigned int		gxasize;	/* getxattr size */
	unsigned int		sxasize;	/* setxattr size */
	unsigned int		lxasize;	/* listxattr size */
#endif
	unsigned int		acregmin;	/* attr cache timeouts */
	unsigned int		acregmax;
	unsigned int		acdirmin;
	unsigned int		acdirmax;
	unsigned int		namelen;
	unsigned int		options;	/* extra options enabled by mount */
	unsigned int		clone_blksize;	/* granularity of a CLONE operation */
#define NFS_OPTION_FSCACHE	0x00000001	/* - local caching enabled */
#define NFS_OPTION_MIGRATION	0x00000002	/* - NFSv4 migration enabled */

	struct nfs_fsid		fsid;
	__u64			maxfilesize;	/* maximum file size */
	struct timespec64	time_delta;	/* smallest time granularity */
	unsigned long		mount_time;	/* when this fs was mounted */
	struct super_block	*super;		/* VFS super block */
	dev_t			s_dev;		/* superblock dev numbers */
	struct nfs_auth_info	auth_info;	/* parsed auth flavors */

#ifdef CONFIG_NFS_FSCACHE
	struct nfs_fscache_key	*fscache_key;	/* unique key for superblock */
	struct fscache_cookie	*fscache;	/* superblock cookie */
#endif

	u32			pnfs_blksize;	/* layout_blksize attr */
#if IS_ENABLED(CONFIG_NFS_V4)
	u32			attr_bitmask[3];/* V4 bitmask representing the set
						   of attributes supported on this
						   filesystem */
	u32			attr_bitmask_nl[3];
						/* V4 bitmask representing the
						   set of attributes supported
						   on this filesystem excluding
						   the label support bit. */
	u32			exclcreat_bitmask[3];
						/* V4 bitmask representing the
						   set of attributes supported
						   on this filesystem for the
						   exclusive create. */
	u32			cache_consistency_bitmask[3];
						/* V4 bitmask representing the subset
						   of change attribute, size, ctime
						   and mtime attributes supported by
						   the server */
	u32			acl_bitmask;	/* V4 bitmask representing the ACEs
						   that are supported on this
						   filesystem */
	u32			fh_expire_type;	/* V4 bitmask representing file
						   handle volatility type for
						   this filesystem */
	struct pnfs_layoutdriver_type  *pnfs_curr_ld; /* Active layout driver */
	struct rpc_wait_queue	roc_rpcwaitq;
	void			*pnfs_ld_data;	/* per mount point data */

	/* the following fields are protected by nfs_client->cl_lock */
	struct rb_root		state_owners;
#endif
	struct ida		openowner_id;
	struct ida		lockowner_id;
	struct list_head	state_owners_lru;
	struct list_head	layouts;
	struct list_head	delegations;
	struct list_head	ss_copies;

	unsigned long		mig_gen;
	unsigned long		mig_status;
#define NFS_MIG_IN_TRANSITION		(1)
#define NFS_MIG_FAILED			(2)
#define NFS_MIG_TSM_POSSIBLE		(3)

	void (*destroy)(struct nfs_server *);

	atomic_t active; /* Keep trace of any activity to this server */

	/* mountd-related mount options */
	struct sockaddr_storage	mountd_address;
	size_t			mountd_addrlen;
	u32			mountd_version;
	unsigned short		mountd_port;
	unsigned short		mountd_protocol;
	struct rpc_wait_queue	uoc_rpcwaitq;

	/* XDR related information */
	unsigned int		read_hdrsize;

	/* User namespace info */
	const struct cred	*cred;
};

/* Server capabilities */
#define NFS_CAP_READDIRPLUS	(1U << 0)
#define NFS_CAP_HARDLINKS	(1U << 1)
#define NFS_CAP_SYMLINKS	(1U << 2)
#define NFS_CAP_ACLS		(1U << 3)
#define NFS_CAP_ATOMIC_OPEN	(1U << 4)
/* #define NFS_CAP_CHANGE_ATTR	(1U << 5) */
#define NFS_CAP_LGOPEN		(1U << 5)
#define NFS_CAP_FILEID		(1U << 6)
#define NFS_CAP_MODE		(1U << 7)
#define NFS_CAP_NLINK		(1U << 8)
#define NFS_CAP_OWNER		(1U << 9)
#define NFS_CAP_OWNER_GROUP	(1U << 10)
#define NFS_CAP_ATIME		(1U << 11)
#define NFS_CAP_CTIME		(1U << 12)
#define NFS_CAP_MTIME		(1U << 13)
#define NFS_CAP_POSIX_LOCK	(1U << 14)
#define NFS_CAP_UIDGID_NOMAP	(1U << 15)
#define NFS_CAP_STATEID_NFSV41	(1U << 16)
#define NFS_CAP_ATOMIC_OPEN_V1	(1U << 17)
#define NFS_CAP_SECURITY_LABEL	(1U << 18)
#define NFS_CAP_SEEK		(1U << 19)
#define NFS_CAP_ALLOCATE	(1U << 20)
#define NFS_CAP_DEALLOCATE	(1U << 21)
#define NFS_CAP_LAYOUTSTATS	(1U << 22)
#define NFS_CAP_CLONE		(1U << 23)
#define NFS_CAP_COPY		(1U << 24)
#define NFS_CAP_OFFLOAD_CANCEL	(1U << 25)
#define NFS_CAP_LAYOUTERROR	(1U << 26)
#define NFS_CAP_COPY_NOTIFY	(1U << 27)
#define NFS_CAP_XATTR		(1U << 28)
#define NFS_CAP_READ_PLUS	(1U << 29)

#endif
Commit	Line	Data
	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	#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 */
	52	size_t cl_addrlen;
	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 */
	57
	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 */
	62
	63	u32 cl_minorversion;/* NFSv4 minorversion */
	64	unsigned int cl_nconnect; /* Number of connections */
	65	const char * cl_principal; /* used for machine cred */
	66
	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;
	72
	73	spinlock_t cl_lock;
	74
	75	unsigned long cl_lease_time;
	76	unsigned long cl_last_renewal;
	77	struct delayed_work cl_renewd;
	78
	79	struct rpc_wait_queue cl_rpcwaitq;
	80
	81	/* idmapper */
	82	struct idmap * cl_idmap;
	83
	84	/* Client owner identifier */
	85	const char * cl_owner_id;
	86
	87	u32 cl_cb_ident; /* v4.0 callback identifier */
	88	const struct nfs4_minor_version_ops *cl_mvops;
	89	unsigned long cl_mig_gen;
	90
	91	/* NFSv4.0 transport blocking */
	92	struct nfs4_slot_table *cl_slot_tbl;
	93
	94	/* The sequence id to use for the next CREATE_SESSION */
	95	u32 cl_seqid;
	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 */
	117
	118	/* Our own IP address, as a null-terminated string.
	119	* This is used to generate the mv0 callback address.
	120	*/
	121	char cl_ipaddr[48];
	122
	123	#ifdef CONFIG_NFS_FSCACHE
	124	struct fscache_cookie fscache; / client index cache cookie */
	125	#endif
	126
	127	struct net *cl_net;
	128	struct list_head pending_cb_stateids;
	129	};
	130
	131	/*
	132	* NFS client parameters stored in the superblock.
	133	*/
	134	struct nfs_server {
	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
	138	*/
	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 */
	146
	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
	158
	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 */
	172	#endif
	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 */
	182
	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 */
	190
	191	#ifdef CONFIG_NFS_FSCACHE
	192	struct nfs_fscache_key fscache_key; / unique key for superblock */
	193	struct fscache_cookie fscache; / superblock cookie */
	194	#endif
	195
	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
	200	filesystem */
	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
	210	exclusive create. */
	211	u32 cache_consistency_bitmask[3];
	212	/* V4 bitmask representing the subset
	213	of change attribute, size, ctime
	214	and mtime attributes supported by
	215	the server */
	216	u32 acl_bitmask; /* V4 bitmask representing the ACEs
	217	that are supported on this
	218	filesystem */
	219	u32 fh_expire_type; /* V4 bitmask representing file
	220	handle volatility type for
	221	this filesystem */
	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 */
	225
	226	/* the following fields are protected by nfs_client->cl_lock */
	227	struct rb_root state_owners;
	228	#endif
	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;
	235
	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)
	241
	242	void (destroy)(struct nfs_server );
	243
	244	atomic_t active; /* Keep trace of any activity to this server */
	245
	246	/* mountd-related mount options */
	247	struct sockaddr_storage mountd_address;
	248	size_t mountd_addrlen;
	249	u32 mountd_version;
	250	unsigned short mountd_port;
	251	unsigned short mountd_protocol;
	252	struct rpc_wait_queue uoc_rpcwaitq;
	253
	254	/* XDR related information */
	255	unsigned int read_hdrsize;
	256
	257	/* User namespace info */
	258	const struct cred *cred;
	259	};
	260
	261	/* Server capabilities */
	262	#define NFS_CAP_READDIRPLUS (1U << 0)
	263	#define NFS_CAP_HARDLINKS (1U << 1)
	264	#define NFS_CAP_SYMLINKS (1U << 2)
	265	#define NFS_CAP_ACLS (1U << 3)
	266	#define NFS_CAP_ATOMIC_OPEN (1U << 4)
	267	/* #define NFS_CAP_CHANGE_ATTR (1U << 5) */
	268	#define NFS_CAP_LGOPEN (1U << 5)
	269	#define NFS_CAP_FILEID (1U << 6)
	270	#define NFS_CAP_MODE (1U << 7)
	271	#define NFS_CAP_NLINK (1U << 8)
	272	#define NFS_CAP_OWNER (1U << 9)
	273	#define NFS_CAP_OWNER_GROUP (1U << 10)
	274	#define NFS_CAP_ATIME (1U << 11)
	275	#define NFS_CAP_CTIME (1U << 12)
	276	#define NFS_CAP_MTIME (1U << 13)
	277	#define NFS_CAP_POSIX_LOCK (1U << 14)
	278	#define NFS_CAP_UIDGID_NOMAP (1U << 15)
	279	#define NFS_CAP_STATEID_NFSV41 (1U << 16)
	280	#define NFS_CAP_ATOMIC_OPEN_V1 (1U << 17)
	281	#define NFS_CAP_SECURITY_LABEL (1U << 18)
	282	#define NFS_CAP_SEEK (1U << 19)
	283	#define NFS_CAP_ALLOCATE (1U << 20)
	284	#define NFS_CAP_DEALLOCATE (1U << 21)
	285	#define NFS_CAP_LAYOUTSTATS (1U << 22)
	286	#define NFS_CAP_CLONE (1U << 23)
	287	#define NFS_CAP_COPY (1U << 24)
	288	#define NFS_CAP_OFFLOAD_CANCEL (1U << 25)
	289	#define NFS_CAP_LAYOUTERROR (1U << 26)
	290	#define NFS_CAP_COPY_NOTIFY (1U << 27)
	291	#define NFS_CAP_XATTR (1U << 28)
	292	#define NFS_CAP_READ_PLUS (1U << 29)
	293
	294	#endif