SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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 #include <linux/nfs_xdr.h>
   8 #include <linux/sunrpc/xprt.h>
   9
  10 #include <asm/atomic.h>
  11
  12 struct nfs4_session;
  13 struct nfs_iostats;
  14 struct nlm_host;
  15 struct nfs4_sequence_args;
  16 struct nfs4_sequence_res;
  17 struct nfs_server;
  18
  19 /*
  20  * The nfs_client identifies our client state to the server.
  21  */
  22 struct nfs_client {
  23         atomic_t                cl_count;
  24         int                     cl_cons_state;  /* current construction state (-ve: init error) */
  25 #define NFS_CS_READY            0               /* ready to be used */
  26 #define NFS_CS_INITING          1               /* busy initialising */
  27         unsigned long           cl_res_state;   /* NFS resources state */
  28 #define NFS_CS_CALLBACK         1               /* - callback started */
  29 #define NFS_CS_IDMAP            2               /* - idmap started */
  30 #define NFS_CS_RENEWD           3               /* - renewd started */
  31         struct sockaddr_storage cl_addr;        /* server identifier */
  32         size_t                  cl_addrlen;
  33         char *                  cl_hostname;    /* hostname of server */
  34         struct list_head        cl_share_link;  /* link in global client list */
  35         struct list_head        cl_superblocks; /* List of nfs_server structs */
  36
  37         struct rpc_clnt *       cl_rpcclient;
  38         const struct nfs_rpc_ops *rpc_ops;      /* NFS protocol vector */
  39         int                     cl_proto;       /* Network transport protocol */
  40
  41         u32                     cl_minorversion;/* NFSv4 minorversion */
  42         struct rpc_cred         *cl_machine_cred;
  43
  44 #ifdef CONFIG_NFS_V4
  45         u64                     cl_clientid;    /* constant */
  46         nfs4_verifier           cl_confirm;
  47         unsigned long           cl_state;
  48
  49         struct rb_root          cl_openowner_id;
  50         struct rb_root          cl_lockowner_id;
  51
  52         struct list_head        cl_delegations;
  53         struct rb_root          cl_state_owners;
  54         spinlock_t              cl_lock;
  55
  56         unsigned long           cl_lease_time;
  57         unsigned long           cl_last_renewal;
  58         struct delayed_work     cl_renewd;
  59
  60         struct rpc_wait_queue   cl_rpcwaitq;
  61
  62         /* used for the setclientid verifier */
  63         struct timespec         cl_boot_time;
  64
  65         /* idmapper */
  66         struct idmap *          cl_idmap;
  67
  68         /* Our own IP address, as a null-terminated string.
  69          * This is used to generate the clientid, and the callback address.
  70          */
  71         char                    cl_ipaddr[48];
  72         unsigned char           cl_id_uniquifier;
  73         int                  (* cl_call_sync)(struct nfs_server *server,
  74                                               struct rpc_message *msg,
  75                                               struct nfs4_sequence_args *args,
  76                                               struct nfs4_sequence_res *res,
  77                                               int cache_reply);
  78 #endif /* CONFIG_NFS_V4 */
  79
  80 #ifdef CONFIG_NFS_V4_1
  81         /* clientid returned from EXCHANGE_ID, used by session operations */
  82         u64                     cl_ex_clid;
  83         /* The sequence id to use for the next CREATE_SESSION */
  84         u32                     cl_seqid;
  85         /* The flags used for obtaining the clientid during EXCHANGE_ID */
  86         u32                     cl_exchange_flags;
  87         struct nfs4_session     *cl_session;    /* sharred session */
  88 #endif /* CONFIG_NFS_V4_1 */
  89
  90 #ifdef CONFIG_NFS_FSCACHE
  91         struct fscache_cookie   *fscache;       /* client index cache cookie */
  92 #endif
  93 };
  94
  95 /*
  96  * NFS client parameters stored in the superblock.
  97  */
  98 struct nfs_server {
  99         struct nfs_client *     nfs_client;     /* shared client and NFS4 state */
 100         struct list_head        client_link;    /* List of other nfs_server structs
 101                                                  * that share the same client
 102                                                  */
 103         struct list_head        master_link;    /* link in master servers list */
 104         struct rpc_clnt *       client;         /* RPC client handle */
 105         struct rpc_clnt *       client_acl;     /* ACL RPC client handle */
 106         struct nlm_host         *nlm_host;      /* NLM client handle */
 107         struct nfs_iostats *    io_stats;       /* I/O statistics */
 108         struct backing_dev_info backing_dev_info;
 109         atomic_long_t           writeback;      /* number of writeback pages */
 110         int                     flags;          /* various flags */
 111         unsigned int            caps;           /* server capabilities */
 112         unsigned int            rsize;          /* read size */
 113         unsigned int            rpages;         /* read size (in pages) */
 114         unsigned int            wsize;          /* write size */
 115         unsigned int            wpages;         /* write size (in pages) */
 116         unsigned int            wtmult;         /* server disk block size */
 117         unsigned int            dtsize;         /* readdir size */
 118         unsigned short          port;           /* "port=" setting */
 119         unsigned int            bsize;          /* server block size */
 120         unsigned int            acregmin;       /* attr cache timeouts */
 121         unsigned int            acregmax;
 122         unsigned int            acdirmin;
 123         unsigned int            acdirmax;
 124         unsigned int            namelen;
 125         unsigned int            options;        /* extra options enabled by mount */
 126 #define NFS_OPTION_FSCACHE      0x00000001      /* - local caching enabled */
 127
 128         struct nfs_fsid         fsid;
 129         __u64                   maxfilesize;    /* maximum file size */
 130         unsigned long           mount_time;     /* when this fs was mounted */
 131         dev_t                   s_dev;          /* superblock dev numbers */
 132
 133 #ifdef CONFIG_NFS_FSCACHE
 134         struct nfs_fscache_key  *fscache_key;   /* unique key for superblock */
 135         struct fscache_cookie   *fscache;       /* superblock cookie */
 136 #endif
 137
 138 #ifdef CONFIG_NFS_V4
 139         u32                     attr_bitmask[2];/* V4 bitmask representing the set
 140                                                    of attributes supported on this
 141                                                    filesystem */
 142         u32                     cache_consistency_bitmask[2];
 143                                                 /* V4 bitmask representing the subset
 144                                                    of change attribute, size, ctime
 145                                                    and mtime attributes supported by
 146                                                    the server */
 147         u32                     acl_bitmask;    /* V4 bitmask representing the ACEs
 148                                                    that are supported on this
 149                                                    filesystem */
 150 #endif
 151         void (*destroy)(struct nfs_server *);
 152
 153         atomic_t active; /* Keep trace of any activity to this server */
 154
 155         /* mountd-related mount options */
 156         struct sockaddr_storage mountd_address;
 157         size_t                  mountd_addrlen;
 158         u32                     mountd_version;
 159         unsigned short          mountd_port;
 160         unsigned short          mountd_protocol;
 161 };
 162
 163 /* Server capabilities */
 164 #define NFS_CAP_READDIRPLUS     (1U << 0)
 165 #define NFS_CAP_HARDLINKS       (1U << 1)
 166 #define NFS_CAP_SYMLINKS        (1U << 2)
 167 #define NFS_CAP_ACLS            (1U << 3)
 168 #define NFS_CAP_ATOMIC_OPEN     (1U << 4)
 169
 170
 171 /* maximum number of slots to use */
 172 #define NFS4_MAX_SLOT_TABLE RPC_MAX_SLOT_TABLE
 173
 174 #if defined(CONFIG_NFS_V4_1)
 175
 176 /* Sessions */
 177 #define SLOT_TABLE_SZ (NFS4_MAX_SLOT_TABLE/(8*sizeof(long)))
 178 struct nfs4_slot_table {
 179         struct nfs4_slot *slots;                /* seqid per slot */
 180         unsigned long   used_slots[SLOT_TABLE_SZ]; /* used/unused bitmap */
 181         spinlock_t      slot_tbl_lock;
 182         struct rpc_wait_queue   slot_tbl_waitq; /* allocators may wait here */
 183         int             max_slots;              /* # slots in table */
 184         int             highest_used_slotid;    /* sent to server on each SEQ.
 185                                                  * op for dynamic resizing */
 186 };
 187
 188 static inline int slot_idx(struct nfs4_slot_table *tbl, struct nfs4_slot *sp)
 189 {
 190         return sp - tbl->slots;
 191 }
 192
 193 /*
 194  * Session related parameters
 195  */
 196 struct nfs4_session {
 197         struct nfs4_sessionid           sess_id;
 198         u32                             flags;
 199         unsigned long                   session_state;
 200         u32                             hash_alg;
 201         u32                             ssv_len;
 202
 203         /* The fore and back channel */
 204         struct nfs4_channel_attrs       fc_attrs;
 205         struct nfs4_slot_table          fc_slot_table;
 206         struct nfs4_channel_attrs       bc_attrs;
 207                                         /* back channel has one slot */
 208         struct nfs_client               *clp;
 209 };
 210
 211 #endif /* CONFIG_NFS_V4_1 */
 212 #endif