[mirror_ubuntu-zesty-kernel.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/wait.h>

#include <asm/atomic.h>

struct nfs_iostats;
struct nlm_host;

/*
 * 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 */
	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 */
	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 */

#ifdef CONFIG_NFS_V4
	u64			cl_clientid;	/* constant */
	nfs4_verifier		cl_confirm;
	unsigned long		cl_state;

	struct rb_root		cl_openowner_id;
	struct rb_root		cl_lockowner_id;

	/*
	 * The following rwsem ensures exclusive access to the server
	 * while we recover the state following a lease expiration.
	 */
	struct rw_semaphore	cl_sem;

	struct list_head	cl_delegations;
	struct rb_root		cl_state_owners;
	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;
#endif
};

/*
 * 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 *	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;

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

#ifdef CONFIG_NFS_V4
	u32			attr_bitmask[2];/* V4 bitmask representing the set
						   of attributes supported on this
						   filesystem */
	u32			acl_bitmask;	/* V4 bitmask representing the ACEs
						   that are supported on this
						   filesystem */
#endif
	void (*destroy)(struct nfs_server *);

	atomic_t active; /* Keep trace of any activity to this server */
	wait_queue_head_t active_wq;  /* Wait for any activity to stop  */
};

/* 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)

#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>
ef818a28 SD	6	#include <linux/wait.h>
	7
	8	#include <asm/atomic.h>
1da177e4	9
d9ef5a8c	10	struct nfs_iostats;
9289e7f9	11	struct nlm_host;
d9ef5a8c	12
24c8dbbb DH	13	/*
	14	* The nfs_client identifies our client state to the server.
	15	*/
	16	struct nfs_client {
	17	atomic_t cl_count;
	18	int cl_cons_state; /* current construction state (-ve: init error) */
	19	#define NFS_CS_READY 0 /* ready to be used */
	20	#define NFS_CS_INITING 1 /* busy initialising */
24c8dbbb	21	unsigned long cl_res_state; /* NFS resources state */
24c8dbbb DH	22	#define NFS_CS_CALLBACK 1 /* - callback started */
24c8dbbb DH	23	#define NFS_CS_IDMAP 2 /* - idmap started */
5dd3177a	24	#define NFS_CS_RENEWD 3 /* - renewd started */
6e4cffd7 CL	25	struct sockaddr_storage cl_addr; /* server identifier */
6e4cffd7 CL	26	size_t cl_addrlen;
24c8dbbb DH	27	char * cl_hostname; /* hostname of server */
	28	struct list_head cl_share_link; /* link in global client list */
	29	struct list_head cl_superblocks; /* List of nfs_server structs */
	30
	31	struct rpc_clnt * cl_rpcclient;
8fa5c000	32	const struct nfs_rpc_ops rpc_ops; / NFS protocol vector */
59dca3b2	33	int cl_proto; /* Network transport protocol */
24c8dbbb DH	34
	35	#ifdef CONFIG_NFS_V4
	36	u64 cl_clientid; /* constant */
	37	nfs4_verifier cl_confirm;
	38	unsigned long cl_state;
	39
9f958ab8 TM	40	struct rb_root cl_openowner_id;
9f958ab8 TM	41	struct rb_root cl_lockowner_id;
24c8dbbb DH	42
	43	/*
	44	* The following rwsem ensures exclusive access to the server
	45	* while we recover the state following a lease expiration.
	46	*/
	47	struct rw_semaphore cl_sem;
	48
	49	struct list_head cl_delegations;
9f958ab8	50	struct rb_root cl_state_owners;
24c8dbbb DH	51	spinlock_t cl_lock;
	52
	53	unsigned long cl_lease_time;
	54	unsigned long cl_last_renewal;
52bad64d	55	struct delayed_work cl_renewd;
24c8dbbb DH	56
	57	struct rpc_wait_queue cl_rpcwaitq;
	58
	59	/* used for the setclientid verifier */
	60	struct timespec cl_boot_time;
	61
	62	/* idmapper */
	63	struct idmap * cl_idmap;
	64
	65	/* Our own IP address, as a null-terminated string.
	66	* This is used to generate the clientid, and the callback address.
	67	*/
4392f259	68	char cl_ipaddr[48];
24c8dbbb DH	69	unsigned char cl_id_uniquifier;
	70	#endif
	71	};
	72
1da177e4 LT	73	/*
	74	* NFS client parameters stored in the superblock.
	75	*/
	76	struct nfs_server {
27951bd2	77	struct nfs_client * nfs_client; /* shared client and NFS4 state */
54ceac45 DH	78	struct list_head client_link; /* List of other nfs_server structs
	79	* that share the same client
	80	*/
	81	struct list_head master_link; /* link in master servers list */
1da177e4	82	struct rpc_clnt * client; /* RPC client handle */
b7fa0554	83	struct rpc_clnt * client_acl; /* ACL RPC client handle */
9289e7f9	84	struct nlm_host nlm_host; / NLM client handle */
d9ef5a8c	85	struct nfs_iostats * io_stats; /* I/O statistics */
1da177e4	86	struct backing_dev_info backing_dev_info;
277866a0	87	atomic_long_t writeback; /* number of writeback pages */
1da177e4 LT	88	int flags; /* various flags */
	89	unsigned int caps; /* server capabilities */
	90	unsigned int rsize; /* read size */
	91	unsigned int rpages; /* read size (in pages) */
	92	unsigned int wsize; /* write size */
	93	unsigned int wpages; /* write size (in pages) */
	94	unsigned int wtmult; /* server disk block size */
	95	unsigned int dtsize; /* readdir size */
f22d6d79	96	unsigned short port; /* "port=" setting */
1da177e4 LT	97	unsigned int bsize; /* server block size */
	98	unsigned int acregmin; /* attr cache timeouts */
	99	unsigned int acregmax;
	100	unsigned int acdirmin;
	101	unsigned int acdirmax;
	102	unsigned int namelen;
54ceac45	103
8b4bdcf8	104	struct nfs_fsid fsid;
54ceac45	105	__u64 maxfilesize; /* maximum file size */
67ec9f46	106	unsigned long mount_time; /* when this fs was mounted */
54ceac45 DH	107	dev_t s_dev; /* superblock dev numbers */
54ceac45 DH	108
1da177e4	109	#ifdef CONFIG_NFS_V4
1da177e4 LT	110	u32 attr_bitmask[2];/* V4 bitmask representing the set
	111	of attributes supported on this
	112	filesystem */
	113	u32 acl_bitmask; /* V4 bitmask representing the ACEs
	114	that are supported on this
	115	filesystem */
	116	#endif
54ceac45	117	void (destroy)(struct nfs_server );
ef818a28 SD	118
	119	atomic_t active; /* Keep trace of any activity to this server */
	120	wait_queue_head_t active_wq; /* Wait for any activity to stop */
1da177e4 LT	121	};
	122
	123	/* Server capabilities */
	124	#define NFS_CAP_READDIRPLUS (1U << 0)
	125	#define NFS_CAP_HARDLINKS (1U << 1)
	126	#define NFS_CAP_SYMLINKS (1U << 2)
	127	#define NFS_CAP_ACLS (1U << 3)
	128	#define NFS_CAP_ATOMIC_OPEN (1U << 4)
	129
	130	#endif