[deliverable/linux.git] / include / linux / nfs_fs_sb.h

#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>

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 {
	atomic_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 */
	struct sockaddr_storage	cl_addr;	/* server identifier */
	size_t			cl_addrlen;
	char *			cl_hostname;	/* hostname of server */
	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 */

	u32			cl_minorversion;/* NFSv4 minorversion */
	struct rpc_cred		*cl_machine_cred;

#ifdef CONFIG_NFS_V4
	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;

	/* Our own IP address, as a null-terminated string.
	 * This is used to generate the clientid, and the callback address.
	 */
	char			cl_ipaddr[48];
	unsigned char		cl_id_uniquifier;
	u32			cl_cb_ident;	/* v4.0 callback identifier */
	const struct nfs4_minor_version_ops *cl_mvops;

	/* 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 */
	struct nfs41_server_owner *cl_serverowner;
	struct nfs41_server_scope *cl_serverscope;
	struct nfs41_impl_id	*cl_implid;
#endif /* CONFIG_NFS_V4 */

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

	struct net		*cl_net;
};

/*
 * 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 */
	struct backing_dev_info	backing_dev_info;
	atomic_long_t		writeback;	/* number of writeback pages */
	int			flags;		/* various flags */
	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 */
	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 */
#define NFS_OPTION_FSCACHE	0x00000001	/* - local caching enabled */

	struct nfs_fsid		fsid;
	__u64			maxfilesize;	/* maximum file size */
	struct timespec		time_delta;	/* smallest time granularity */
	unsigned long		mount_time;	/* when this fs was mounted */
	dev_t			s_dev;		/* superblock dev numbers */

#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 */
#ifdef CONFIG_NFS_V4
	u32			attr_bitmask[3];/* V4 bitmask representing the set
						   of attributes supported on this
						   filesystem */
	u32			cache_consistency_bitmask[2];
						/* 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;
	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;
};

/* 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_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)


/* maximum number of slots to use */
#define NFS4_DEF_SLOT_TABLE_SIZE (16U)
#define NFS4_MAX_SLOT_TABLE (256U)
#define NFS4_NO_SLOT ((u32)-1)

#if defined(CONFIG_NFS_V4)

/* Sessions */
#define SLOT_TABLE_SZ DIV_ROUND_UP(NFS4_MAX_SLOT_TABLE, 8*sizeof(long))
struct nfs4_slot_table {
	struct nfs4_slot *slots;		/* seqid per slot */
	unsigned long   used_slots[SLOT_TABLE_SZ]; /* used/unused bitmap */
	spinlock_t	slot_tbl_lock;
	struct rpc_wait_queue	slot_tbl_waitq;	/* allocators may wait here */
	u32		max_slots;		/* # slots in table */
	u32		highest_used_slotid;	/* sent to server on each SEQ.
						 * op for dynamic resizing */
	u32		target_max_slots;	/* Set by CB_RECALL_SLOT as
						 * the new max_slots */
	struct completion complete;
};

static inline int slot_idx(struct nfs4_slot_table *tbl, struct nfs4_slot *sp)
{
	return sp - tbl->slots;
}

/*
 * Session related parameters
 */
struct nfs4_session {
	struct nfs4_sessionid		sess_id;
	u32				flags;
	unsigned long			session_state;
	u32				hash_alg;
	u32				ssv_len;

	/* The fore and back channel */
	struct nfs4_channel_attrs	fc_attrs;
	struct nfs4_slot_table		fc_slot_table;
	struct nfs4_channel_attrs	bc_attrs;
	struct nfs4_slot_table		bc_slot_table;
	struct nfs_client		*clp;
};

#endif /* CONFIG_NFS_V4 */
#endif
Commit	Line	Data
1da177e4 LT	1	#ifndef _NFS_FS_SB
	2	#define _NFS_FS_SB
	3
	4	#include <linux/list.h>
	5	#include <linux/backing-dev.h>
9157c31d	6	#include <linux/idr.h>
ef818a28	7	#include <linux/wait.h>
557134a3 AA	8	#include <linux/nfs_xdr.h>
557134a3 AA	9	#include <linux/sunrpc/xprt.h>
ef818a28	10
60063497	11	#include <linux/atomic.h>
1da177e4	12
557134a3	13	struct nfs4_session;
d9ef5a8c	14	struct nfs_iostats;
9289e7f9	15	struct nlm_host;
cccef3b9 AA	16	struct nfs4_sequence_args;
	17	struct nfs4_sequence_res;
	18	struct nfs_server;
97dc1359	19	struct nfs4_minor_version_ops;
79d4e1f0	20	struct nfs41_server_scope;
7d2ed9ac	21	struct nfs41_impl_id;
d9ef5a8c	22
24c8dbbb DH	23	/*
	24	* The nfs_client identifies our client state to the server.
	25	*/
	26	struct nfs_client {
	27	atomic_t cl_count;
2a4c8994	28	atomic_t cl_mds_count;
24c8dbbb DH	29	int cl_cons_state; /* current construction state (-ve: init error) */
	30	#define NFS_CS_READY 0 /* ready to be used */
	31	#define NFS_CS_INITING 1 /* busy initialising */
76db6d95	32	#define NFS_CS_SESSION_INITING 2 /* busy initialising session */
24c8dbbb	33	unsigned long cl_res_state; /* NFS resources state */
24c8dbbb DH	34	#define NFS_CS_CALLBACK 1 /* - callback started */
24c8dbbb DH	35	#define NFS_CS_IDMAP 2 /* - idmap started */
5dd3177a	36	#define NFS_CS_RENEWD 3 /* - renewd started */
d3b4c9d7	37	#define NFS_CS_STOP_RENEW 4 /* no more state to renew */
d6fb79d4	38	#define NFS_CS_CHECK_LEASE_TIME 5 /* need to check lease time */
4bf590e0 CL	39	unsigned long cl_flags; /* behavior switches */
	40	#define NFS_CS_NORESVPORT 0 /* - use ephemeral src port */
	41	#define NFS_CS_DISCRTRY 1 /* - disconnect on RPC retry */
6e4cffd7 CL	42	struct sockaddr_storage cl_addr; /* server identifier */
6e4cffd7 CL	43	size_t cl_addrlen;
24c8dbbb DH	44	char * cl_hostname; /* hostname of server */
	45	struct list_head cl_share_link; /* link in global client list */
	46	struct list_head cl_superblocks; /* List of nfs_server structs */
	47
	48	struct rpc_clnt * cl_rpcclient;
8fa5c000	49	const struct nfs_rpc_ops rpc_ops; / NFS protocol vector */
59dca3b2	50	int cl_proto; /* Network transport protocol */
24c8dbbb	51
94a417f3	52	u32 cl_minorversion;/* NFSv4 minorversion */
7c67db3a TM	53	struct rpc_cred *cl_machine_cred;
7c67db3a TM	54
24c8dbbb DH	55	#ifdef CONFIG_NFS_V4
24c8dbbb DH	56	u64 cl_clientid; /* constant */
fd954ae1	57	nfs4_verifier cl_confirm; /* Clientid verifier */
24c8dbbb DH	58	unsigned long cl_state;
24c8dbbb DH	59
24c8dbbb DH	60	spinlock_t cl_lock;
	61
	62	unsigned long cl_lease_time;
	63	unsigned long cl_last_renewal;
52bad64d	64	struct delayed_work cl_renewd;
24c8dbbb DH	65
	66	struct rpc_wait_queue cl_rpcwaitq;
	67
24c8dbbb DH	68	/* idmapper */
	69	struct idmap * cl_idmap;
	70
	71	/* Our own IP address, as a null-terminated string.
	72	* This is used to generate the clientid, and the callback address.
	73	*/
4392f259	74	char cl_ipaddr[48];
24c8dbbb	75	unsigned char cl_id_uniquifier;
f4eecd5d	76	u32 cl_cb_ident; /* v4.0 callback identifier */
97dc1359	77	const struct nfs4_minor_version_ops *cl_mvops;
14727281	78
99fe60d0 BH	79	/* The sequence id to use for the next CREATE_SESSION */
	80	u32 cl_seqid;
	81	/* The flags used for obtaining the clientid during EXCHANGE_ID */
	82	u32 cl_exchange_flags;
722baafc	83	struct nfs4_session cl_session; / shared session */
acdeb69d	84	struct nfs41_server_owner *cl_serverowner;
79d4e1f0	85	struct nfs41_server_scope *cl_serverscope;
59155546	86	struct nfs41_impl_id *cl_implid;
0400a6b0	87	#endif /* CONFIG_NFS_V4 */
557134a3	88
14727281 DH	89	#ifdef CONFIG_NFS_FSCACHE
	90	struct fscache_cookie fscache; / client index cache cookie */
	91	#endif
78fe0f41	92
73ea666c	93	struct net *cl_net;
24c8dbbb DH	94	};
24c8dbbb DH	95
1da177e4 LT	96	/*
	97	* NFS client parameters stored in the superblock.
	98	*/
	99	struct nfs_server {
27951bd2	100	struct nfs_client * nfs_client; /* shared client and NFS4 state */
54ceac45 DH	101	struct list_head client_link; /* List of other nfs_server structs
	102	* that share the same client
	103	*/
	104	struct list_head master_link; /* link in master servers list */
1da177e4	105	struct rpc_clnt * client; /* RPC client handle */
b7fa0554	106	struct rpc_clnt * client_acl; /* ACL RPC client handle */
9289e7f9	107	struct nlm_host nlm_host; / NLM client handle */
003cb608	108	struct nfs_iostats __percpu io_stats; / I/O statistics */
1da177e4	109	struct backing_dev_info backing_dev_info;
277866a0	110	atomic_long_t writeback; /* number of writeback pages */
1da177e4 LT	111	int flags; /* various flags */
	112	unsigned int caps; /* server capabilities */
	113	unsigned int rsize; /* read size */
	114	unsigned int rpages; /* read size (in pages) */
	115	unsigned int wsize; /* write size */
	116	unsigned int wpages; /* write size (in pages) */
	117	unsigned int wtmult; /* server disk block size */
	118	unsigned int dtsize; /* readdir size */
f22d6d79	119	unsigned short port; /* "port=" setting */
1da177e4 LT	120	unsigned int bsize; /* server block size */
	121	unsigned int acregmin; /* attr cache timeouts */
	122	unsigned int acregmax;
	123	unsigned int acdirmin;
	124	unsigned int acdirmax;
	125	unsigned int namelen;
c6a6f19e DH	126	unsigned int options; /* extra options enabled by mount */
c6a6f19e DH	127	#define NFS_OPTION_FSCACHE 0x00000001 /* - local caching enabled */
54ceac45	128
8b4bdcf8	129	struct nfs_fsid fsid;
54ceac45	130	__u64 maxfilesize; /* maximum file size */
6b96724e	131	struct timespec time_delta; /* smallest time granularity */
67ec9f46	132	unsigned long mount_time; /* when this fs was mounted */
54ceac45 DH	133	dev_t s_dev; /* superblock dev numbers */
54ceac45 DH	134
08734048 DH	135	#ifdef CONFIG_NFS_FSCACHE
	136	struct nfs_fscache_key fscache_key; / unique key for superblock */
	137	struct fscache_cookie fscache; / superblock cookie */
	138	#endif
	139
a00ed25c	140	u32 pnfs_blksize; /* layout_blksize attr */
1da177e4	141	#ifdef CONFIG_NFS_V4
dae100c2	142	u32 attr_bitmask[3];/* V4 bitmask representing the set
1da177e4 LT	143	of attributes supported on this
1da177e4 LT	144	filesystem */
a65318bf TM	145	u32 cache_consistency_bitmask[2];
	146	/* V4 bitmask representing the subset
	147	of change attribute, size, ctime
	148	and mtime attributes supported by
	149	the server */
1da177e4 LT	150	u32 acl_bitmask; /* V4 bitmask representing the ACEs
	151	that are supported on this
	152	filesystem */
264e6351 CL	153	u32 fh_expire_type; /* V4 bitmask representing file
	154	handle volatility type for
	155	this filesystem */
85e174ba	156	struct pnfs_layoutdriver_type pnfs_curr_ld; / Active layout driver */
f7e8917a	157	struct rpc_wait_queue roc_rpcwaitq;
2f9fd182	158	void pnfs_ld_data; / per mount point data */
24d292b8 CL	159
	160	/* the following fields are protected by nfs_client->cl_lock */
	161	struct rb_root state_owners;
1da177e4	162	#endif
9157c31d	163	struct ida openowner_id;
d2d7ce28	164	struct ida lockowner_id;
0aaaf5c4	165	struct list_head state_owners_lru;
6382a441	166	struct list_head layouts;
d3978bb3	167	struct list_head delegations;
54ceac45	168	void (destroy)(struct nfs_server );
ef818a28 SD	169
ef818a28 SD	170	atomic_t active; /* Keep trace of any activity to this server */
3f8400d1 CL	171
	172	/* mountd-related mount options */
	173	struct sockaddr_storage mountd_address;
	174	size_t mountd_addrlen;
	175	u32 mountd_version;
	176	unsigned short mountd_port;
	177	unsigned short mountd_protocol;
1da177e4 LT	178	};
	179
	180	/* Server capabilities */
	181	#define NFS_CAP_READDIRPLUS (1U << 0)
	182	#define NFS_CAP_HARDLINKS (1U << 1)
	183	#define NFS_CAP_SYMLINKS (1U << 2)
	184	#define NFS_CAP_ACLS (1U << 3)
	185	#define NFS_CAP_ATOMIC_OPEN (1U << 4)
62ab460c TM	186	#define NFS_CAP_CHANGE_ATTR (1U << 5)
	187	#define NFS_CAP_FILEID (1U << 6)
	188	#define NFS_CAP_MODE (1U << 7)
	189	#define NFS_CAP_NLINK (1U << 8)
	190	#define NFS_CAP_OWNER (1U << 9)
	191	#define NFS_CAP_OWNER_GROUP (1U << 10)
	192	#define NFS_CAP_ATIME (1U << 11)
	193	#define NFS_CAP_CTIME (1U << 12)
	194	#define NFS_CAP_MTIME (1U << 13)
0df5dd4a	195	#define NFS_CAP_POSIX_LOCK (1U << 14)
b064eca2	196	#define NFS_CAP_UIDGID_NOMAP (1U << 15)
1da177e4	197
557134a3 AA	198
557134a3 AA	199	/* maximum number of slots to use */
ef159e91 TM	200	#define NFS4_DEF_SLOT_TABLE_SIZE (16U)
ef159e91 TM	201	#define NFS4_MAX_SLOT_TABLE (256U)
45d43c29	202	#define NFS4_NO_SLOT ((u32)-1)
557134a3	203
0400a6b0	204	#if defined(CONFIG_NFS_V4)
557134a3 AA	205
557134a3 AA	206	/* Sessions */
ef159e91	207	#define SLOT_TABLE_SZ DIV_ROUND_UP(NFS4_MAX_SLOT_TABLE, 8*sizeof(long))
557134a3 AA	208	struct nfs4_slot_table {
	209	struct nfs4_slot slots; / seqid per slot */
	210	unsigned long used_slots[SLOT_TABLE_SZ]; /* used/unused bitmap */
	211	spinlock_t slot_tbl_lock;
	212	struct rpc_wait_queue slot_tbl_waitq; /* allocators may wait here */
45d43c29 TM	213	u32 max_slots; /* # slots in table */
45d43c29 TM	214	u32 highest_used_slotid; /* sent to server on each SEQ.
557134a3	215	* op for dynamic resizing */
45d43c29	216	u32 target_max_slots; /* Set by CB_RECALL_SLOT as
b9efa1b2	217	* the new max_slots */
42acd021	218	struct completion complete;
557134a3 AA	219	};
	220
	221	static inline int slot_idx(struct nfs4_slot_table tbl, struct nfs4_slot sp)
	222	{
	223	return sp - tbl->slots;
	224	}
	225
	226	/*
	227	* Session related parameters
	228	*/
	229	struct nfs4_session {
	230	struct nfs4_sessionid sess_id;
	231	u32 flags;
	232	unsigned long session_state;
	233	u32 hash_alg;
	234	u32 ssv_len;
	235
	236	/* The fore and back channel */
	237	struct nfs4_channel_attrs fc_attrs;
	238	struct nfs4_slot_table fc_slot_table;
	239	struct nfs4_channel_attrs bc_attrs;
f8625a6a	240	struct nfs4_slot_table bc_slot_table;
557134a3 AA	241	struct nfs_client *clp;
	242	};
	243
0400a6b0	244	#endif /* CONFIG_NFS_V4 */
1da177e4	245	#endif