WorkStruct: Separate delayable and non-delayable events.
[linux-2.6.git] / include / linux / nfs_fs_sb.h
1 #ifndef _NFS_FS_SB
2 #define _NFS_FS_SB
3
4 #include <linux/list.h>
5 #include <linux/backing-dev.h>
6
7 struct nfs_iostats;
8
9 /*
10  * The nfs_client identifies our client state to the server.
11  */
12 struct nfs_client {
13         atomic_t                cl_count;
14         int                     cl_cons_state;  /* current construction state (-ve: init error) */
15 #define NFS_CS_READY            0               /* ready to be used */
16 #define NFS_CS_INITING          1               /* busy initialising */
17         int                     cl_nfsversion;  /* NFS protocol version */
18         unsigned long           cl_res_state;   /* NFS resources state */
19 #define NFS_CS_RPCIOD           0               /* - rpciod started */
20 #define NFS_CS_CALLBACK         1               /* - callback started */
21 #define NFS_CS_IDMAP            2               /* - idmap started */
22 #define NFS_CS_RENEWD           3               /* - renewd started */
23         struct sockaddr_in      cl_addr;        /* server identifier */
24         char *                  cl_hostname;    /* hostname of server */
25         struct list_head        cl_share_link;  /* link in global client list */
26         struct list_head        cl_superblocks; /* List of nfs_server structs */
27
28         struct rpc_clnt *       cl_rpcclient;
29         const struct nfs_rpc_ops *rpc_ops;      /* NFS protocol vector */
30         unsigned long           retrans_timeo;  /* retransmit timeout */
31         unsigned int            retrans_count;  /* number of retransmit tries */
32
33 #ifdef CONFIG_NFS_V4
34         u64                     cl_clientid;    /* constant */
35         nfs4_verifier           cl_confirm;
36         unsigned long           cl_state;
37
38         u32                     cl_lockowner_id;
39
40         /*
41          * The following rwsem ensures exclusive access to the server
42          * while we recover the state following a lease expiration.
43          */
44         struct rw_semaphore     cl_sem;
45
46         struct list_head        cl_delegations;
47         struct list_head        cl_state_owners;
48         struct list_head        cl_unused;
49         int                     cl_nunused;
50         spinlock_t              cl_lock;
51
52         unsigned long           cl_lease_time;
53         unsigned long           cl_last_renewal;
54         struct delayed_work     cl_renewd;
55
56         struct rpc_wait_queue   cl_rpcwaitq;
57
58         /* used for the setclientid verifier */
59         struct timespec         cl_boot_time;
60
61         /* idmapper */
62         struct idmap *          cl_idmap;
63
64         /* Our own IP address, as a null-terminated string.
65          * This is used to generate the clientid, and the callback address.
66          */
67         char                    cl_ipaddr[16];
68         unsigned char           cl_id_uniquifier;
69 #endif
70 };
71
72 /*
73  * NFS client parameters stored in the superblock.
74  */
75 struct nfs_server {
76         struct nfs_client *     nfs_client;     /* shared client and NFS4 state */
77         struct list_head        client_link;    /* List of other nfs_server structs
78                                                  * that share the same client
79                                                  */
80         struct list_head        master_link;    /* link in master servers list */
81         struct rpc_clnt *       client;         /* RPC client handle */
82         struct rpc_clnt *       client_acl;     /* ACL RPC client handle */
83         struct nfs_iostats *    io_stats;       /* I/O statistics */
84         struct backing_dev_info backing_dev_info;
85         int                     flags;          /* various flags */
86         unsigned int            caps;           /* server capabilities */
87         unsigned int            rsize;          /* read size */
88         unsigned int            rpages;         /* read size (in pages) */
89         unsigned int            wsize;          /* write size */
90         unsigned int            wpages;         /* write size (in pages) */
91         unsigned int            wtmult;         /* server disk block size */
92         unsigned int            dtsize;         /* readdir size */
93         unsigned int            bsize;          /* server block size */
94         unsigned int            acregmin;       /* attr cache timeouts */
95         unsigned int            acregmax;
96         unsigned int            acdirmin;
97         unsigned int            acdirmax;
98         unsigned int            namelen;
99
100         struct nfs_fsid         fsid;
101         __u64                   maxfilesize;    /* maximum file size */
102         unsigned long           mount_time;     /* when this fs was mounted */
103         dev_t                   s_dev;          /* superblock dev numbers */
104
105 #ifdef CONFIG_NFS_V4
106         u32                     attr_bitmask[2];/* V4 bitmask representing the set
107                                                    of attributes supported on this
108                                                    filesystem */
109         u32                     acl_bitmask;    /* V4 bitmask representing the ACEs
110                                                    that are supported on this
111                                                    filesystem */
112 #endif
113         void (*destroy)(struct nfs_server *);
114 };
115
116 /* Server capabilities */
117 #define NFS_CAP_READDIRPLUS     (1U << 0)
118 #define NFS_CAP_HARDLINKS       (1U << 1)
119 #define NFS_CAP_SYMLINKS        (1U << 2)
120 #define NFS_CAP_ACLS            (1U << 3)
121 #define NFS_CAP_ATOMIC_OPEN     (1U << 4)
122
123 #endif