include/linux/nfs_fs_sb.h - kernel/mindspeed - Git at Google

 #ifndef _NFS_FS_SB
 #define _NFS_FS_SB

 #include <linux/list.h>
 #include <linux/backing-dev.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 server_scope;

 /*
  * The nfs_client identifies our client state to the server.
  */
 struct nfs_client {
 	atomic_t		cl_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 */
 	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;

 	/* used for the setclientid verifier */
 	struct timespec		cl_boot_time;

 	/* 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; 	/* sharred session */
 #endif /* CONFIG_NFS_V4 */

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

 	struct server_scope	*server_scope;	/* from exchange_id */
 };

 /*
  * 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 */
 	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;
 	struct rb_root		openowner_id;
 	struct rb_root		lockowner_id;
 #endif
 	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_MAX_SLOT_TABLE RPC_MAX_SLOT_TABLE

 #if defined(CONFIG_NFS_V4)

 /* Sessions */
 #define SLOT_TABLE_SZ (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 */
 	int		max_slots;		/* # slots in table */
 	int		highest_used_slotid;	/* sent to server on each SEQ.
 						 * op for dynamic resizing */
 	int		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
	#ifndef _NFS_FS_SB
	#define _NFS_FS_SB

	#include <linux/list.h>
	#include <linux/backing-dev.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 server_scope;

	/*
	* The nfs_client identifies our client state to the server.
	*/
	struct nfs_client {
	atomic_t cl_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 */
	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;

	/* used for the setclientid verifier */
	struct timespec cl_boot_time;

	/* 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; / sharred session */
	#endif /* CONFIG_NFS_V4 */

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

	struct server_scope server_scope; / from exchange_id */
	};

	/*
	* 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 */
	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;
	struct rb_root openowner_id;
	struct rb_root lockowner_id;
	#endif
	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_MAX_SLOT_TABLE RPC_MAX_SLOT_TABLE

	#if defined(CONFIG_NFS_V4)

	/* Sessions */
	#define SLOT_TABLE_SZ (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 */
	int max_slots; /* # slots in table */
	int highest_used_slotid; /* sent to server on each SEQ.
	* op for dynamic resizing */
	int 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