net: Avoid extra wakeups of threads blocked in wait_for_packet()
[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 #include <linux/wait.h>
7
8 #include <asm/atomic.h>
9
10 struct nfs_iostats;
11 struct nlm_host;
12
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 */
21         unsigned long           cl_res_state;   /* NFS resources state */
22 #define NFS_CS_CALLBACK         1               /* - callback started */
23 #define NFS_CS_IDMAP            2               /* - idmap started */
24 #define NFS_CS_RENEWD           3               /* - renewd started */
25         struct sockaddr_storage cl_addr;        /* server identifier */
26         size_t                  cl_addrlen;
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;
32         const struct nfs_rpc_ops *rpc_ops;      /* NFS protocol vector */
33         int                     cl_proto;       /* Network transport protocol */
34
35         struct rpc_cred         *cl_machine_cred;
36
37 #ifdef CONFIG_NFS_V4
38         u64                     cl_clientid;    /* constant */
39         nfs4_verifier           cl_confirm;
40         unsigned long           cl_state;
41
42         struct rb_root          cl_openowner_id;
43         struct rb_root          cl_lockowner_id;
44
45         struct list_head        cl_delegations;
46         struct rb_root          cl_state_owners;
47         spinlock_t              cl_lock;
48
49         unsigned long           cl_lease_time;
50         unsigned long           cl_last_renewal;
51         struct delayed_work     cl_renewd;
52
53         struct rpc_wait_queue   cl_rpcwaitq;
54
55         /* used for the setclientid verifier */
56         struct timespec         cl_boot_time;
57
58         /* idmapper */
59         struct idmap *          cl_idmap;
60
61         /* Our own IP address, as a null-terminated string.
62          * This is used to generate the clientid, and the callback address.
63          */
64         char                    cl_ipaddr[48];
65         unsigned char           cl_id_uniquifier;
66 #endif
67
68 #ifdef CONFIG_NFS_FSCACHE
69         struct fscache_cookie   *fscache;       /* client index cache cookie */
70 #endif
71 };
72
73 /*
74  * NFS client parameters stored in the superblock.
75  */
76 struct nfs_server {
77         struct nfs_client *     nfs_client;     /* shared client and NFS4 state */
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 */
82         struct rpc_clnt *       client;         /* RPC client handle */
83         struct rpc_clnt *       client_acl;     /* ACL RPC client handle */
84         struct nlm_host         *nlm_host;      /* NLM client handle */
85         struct nfs_iostats *    io_stats;       /* I/O statistics */
86         struct backing_dev_info backing_dev_info;
87         atomic_long_t           writeback;      /* number of writeback pages */
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 */
96         unsigned short          port;           /* "port=" setting */
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;
103         unsigned int            options;        /* extra options enabled by mount */
104 #define NFS_OPTION_FSCACHE      0x00000001      /* - local caching enabled */
105
106         struct nfs_fsid         fsid;
107         __u64                   maxfilesize;    /* maximum file size */
108         unsigned long           mount_time;     /* when this fs was mounted */
109         dev_t                   s_dev;          /* superblock dev numbers */
110
111 #ifdef CONFIG_NFS_FSCACHE
112         struct nfs_fscache_key  *fscache_key;   /* unique key for superblock */
113         struct fscache_cookie   *fscache;       /* superblock cookie */
114 #endif
115
116 #ifdef CONFIG_NFS_V4
117         u32                     attr_bitmask[2];/* V4 bitmask representing the set
118                                                    of attributes supported on this
119                                                    filesystem */
120         u32                     cache_consistency_bitmask[2];
121                                                 /* V4 bitmask representing the subset
122                                                    of change attribute, size, ctime
123                                                    and mtime attributes supported by
124                                                    the server */
125         u32                     acl_bitmask;    /* V4 bitmask representing the ACEs
126                                                    that are supported on this
127                                                    filesystem */
128 #endif
129         void (*destroy)(struct nfs_server *);
130
131         atomic_t active; /* Keep trace of any activity to this server */
132
133         /* mountd-related mount options */
134         struct sockaddr_storage mountd_address;
135         size_t                  mountd_addrlen;
136         u32                     mountd_version;
137         unsigned short          mountd_port;
138         unsigned short          mountd_protocol;
139 };
140
141 /* Server capabilities */
142 #define NFS_CAP_READDIRPLUS     (1U << 0)
143 #define NFS_CAP_HARDLINKS       (1U << 1)
144 #define NFS_CAP_SYMLINKS        (1U << 2)
145 #define NFS_CAP_ACLS            (1U << 3)
146 #define NFS_CAP_ATOMIC_OPEN     (1U << 4)
147
148 #endif