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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef _NFS_FS_SB
2#define _NFS_FS_SB
3
4#include <linux/list.h>
5#include <linux/backing-dev.h>
Steve Dicksonef818a22007-11-08 04:05:04 -05006#include <linux/wait.h>
7
8#include <asm/atomic.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07009
Chuck Leverd9ef5a82006-03-20 13:44:13 -050010struct nfs_iostats;
11
Linus Torvalds1da177e2005-04-16 15:20:36 -070012/*
David Howells24c8dbb2006-08-22 20:06:10 -040013 * The nfs_client identifies our client state to the server.
14 */
15struct nfs_client {
16 atomic_t cl_count;
17 int cl_cons_state; /* current construction state (-ve: init error) */
18#define NFS_CS_READY 0 /* ready to be used */
19#define NFS_CS_INITING 1 /* busy initialising */
20 int cl_nfsversion; /* NFS protocol version */
21 unsigned long cl_res_state; /* NFS resources state */
David Howells24c8dbb2006-08-22 20:06:10 -040022#define NFS_CS_CALLBACK 1 /* - callback started */
23#define NFS_CS_IDMAP 2 /* - idmap started */
Trond Myklebust5dd31772006-08-24 01:03:05 -040024#define NFS_CS_RENEWD 3 /* - renewd started */
David Howells24c8dbb2006-08-22 20:06:10 -040025 struct sockaddr_in cl_addr; /* server identifier */
26 char * cl_hostname; /* hostname of server */
27 struct list_head cl_share_link; /* link in global client list */
28 struct list_head cl_superblocks; /* List of nfs_server structs */
29
30 struct rpc_clnt * cl_rpcclient;
David Howells8fa5c002006-08-22 20:06:12 -040031 const struct nfs_rpc_ops *rpc_ops; /* NFS protocol vector */
David Howells5006a762006-08-22 20:06:12 -040032 unsigned long retrans_timeo; /* retransmit timeout */
33 unsigned int retrans_count; /* number of retransmit tries */
David Howells24c8dbb2006-08-22 20:06:10 -040034
35#ifdef CONFIG_NFS_V4
36 u64 cl_clientid; /* constant */
37 nfs4_verifier cl_confirm;
38 unsigned long cl_state;
39
Trond Myklebust9f958ab2007-07-02 13:58:33 -040040 struct rb_root cl_openowner_id;
41 struct rb_root cl_lockowner_id;
David Howells24c8dbb2006-08-22 20:06:10 -040042
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;
Trond Myklebust9f958ab2007-07-02 13:58:33 -040050 struct rb_root cl_state_owners;
David Howells24c8dbb2006-08-22 20:06:10 -040051 spinlock_t cl_lock;
52
53 unsigned long cl_lease_time;
54 unsigned long cl_last_renewal;
David Howells52bad642006-11-22 14:54:01 +000055 struct delayed_work cl_renewd;
David Howells24c8dbb2006-08-22 20:06:10 -040056
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 */
68 char cl_ipaddr[16];
69 unsigned char cl_id_uniquifier;
70#endif
71};
72
73/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070074 * NFS client parameters stored in the superblock.
75 */
76struct nfs_server {
David Howells27951bd2006-08-22 20:06:11 -040077 struct nfs_client * nfs_client; /* shared client and NFS4 state */
David Howells54ceac42006-08-22 20:06:13 -040078 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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070082 struct rpc_clnt * client; /* RPC client handle */
Andreas Gruenbacherb7fa0552005-06-22 17:16:27 +000083 struct rpc_clnt * client_acl; /* ACL RPC client handle */
Chuck Leverd9ef5a82006-03-20 13:44:13 -050084 struct nfs_iostats * io_stats; /* I/O statistics */
Linus Torvalds1da177e2005-04-16 15:20:36 -070085 struct backing_dev_info backing_dev_info;
Peter Zijlstra277866a2007-05-08 00:35:12 -070086 atomic_long_t writeback; /* number of writeback pages */
Linus Torvalds1da177e2005-04-16 15:20:36 -070087 int flags; /* various flags */
88 unsigned int caps; /* server capabilities */
89 unsigned int rsize; /* read size */
90 unsigned int rpages; /* read size (in pages) */
91 unsigned int wsize; /* write size */
92 unsigned int wpages; /* write size (in pages) */
93 unsigned int wtmult; /* server disk block size */
94 unsigned int dtsize; /* readdir size */
95 unsigned int bsize; /* server block size */
96 unsigned int acregmin; /* attr cache timeouts */
97 unsigned int acregmax;
98 unsigned int acdirmin;
99 unsigned int acdirmax;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100 unsigned int namelen;
David Howells54ceac42006-08-22 20:06:13 -0400101
Trond Myklebust8b4bdcf2006-06-09 09:34:19 -0400102 struct nfs_fsid fsid;
David Howells54ceac42006-08-22 20:06:13 -0400103 __u64 maxfilesize; /* maximum file size */
Chuck Lever67ec9f42006-03-20 13:44:15 -0500104 unsigned long mount_time; /* when this fs was mounted */
David Howells54ceac42006-08-22 20:06:13 -0400105 dev_t s_dev; /* superblock dev numbers */
106
Linus Torvalds1da177e2005-04-16 15:20:36 -0700107#ifdef CONFIG_NFS_V4
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108 u32 attr_bitmask[2];/* V4 bitmask representing the set
109 of attributes supported on this
110 filesystem */
111 u32 acl_bitmask; /* V4 bitmask representing the ACEs
112 that are supported on this
113 filesystem */
114#endif
David Howells54ceac42006-08-22 20:06:13 -0400115 void (*destroy)(struct nfs_server *);
Steve Dicksonef818a22007-11-08 04:05:04 -0500116
117 atomic_t active; /* Keep trace of any activity to this server */
118 wait_queue_head_t active_wq; /* Wait for any activity to stop */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119};
120
121/* Server capabilities */
122#define NFS_CAP_READDIRPLUS (1U << 0)
123#define NFS_CAP_HARDLINKS (1U << 1)
124#define NFS_CAP_SYMLINKS (1U << 2)
125#define NFS_CAP_ACLS (1U << 3)
126#define NFS_CAP_ATOMIC_OPEN (1U << 4)
127
128#endif