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   1 #ifndef _NFS_FS_SB
   2 #define _NFS_FS_SB
   3
   4 #include <linux/list.h>
   5 #include <linux/backing-dev.h>
   6
   7 /*
   8  * NFS client parameters stored in the superblock.
   9  */
  10 struct nfs_server {
  11         struct rpc_clnt *       client;         /* RPC client handle */
  12         struct rpc_clnt *       client_sys;     /* 2nd handle for FSINFO */
  13         struct rpc_clnt *       client_acl;     /* ACL RPC client handle */
  14         struct nfs_rpc_ops *    rpc_ops;        /* NFS protocol vector */
  15         struct backing_dev_info backing_dev_info;
  16         int                     flags;          /* various flags */
  17         unsigned int            caps;           /* server capabilities */
  18         unsigned int            rsize;          /* read size */
  19         unsigned int            rpages;         /* read size (in pages) */
  20         unsigned int            wsize;          /* write size */
  21         unsigned int            wpages;         /* write size (in pages) */
  22         unsigned int            wtmult;         /* server disk block size */
  23         unsigned int            dtsize;         /* readdir size */
  24         unsigned int            bsize;          /* server block size */
  25         unsigned int            acregmin;       /* attr cache timeouts */
  26         unsigned int            acregmax;
  27         unsigned int            acdirmin;
  28         unsigned int            acdirmax;
  29         unsigned long           retrans_timeo;  /* retransmit timeout */
  30         unsigned int            retrans_count;  /* number of retransmit tries */
  31         unsigned int            namelen;
  32         char *                  hostname;       /* remote hostname */
  33         struct nfs_fh           fh;
  34         struct sockaddr_in      addr;
  35 #ifdef CONFIG_NFS_V4
  36         /* Our own IP address, as a null-terminated string.
  37          * This is used to generate the clientid, and the callback address.
  38          */
  39         char                    ip_addr[16];
  40         char *                  mnt_path;
  41         struct nfs4_client *    nfs4_state;     /* all NFSv4 state starts here */
  42         struct list_head        nfs4_siblings;  /* List of other nfs_server structs
  43                                                  * that share the same clientid
  44                                                  */
  45         u32                     attr_bitmask[2];/* V4 bitmask representing the set
  46                                                    of attributes supported on this
  47                                                    filesystem */
  48         u32                     acl_bitmask;    /* V4 bitmask representing the ACEs
  49                                                    that are supported on this
  50                                                    filesystem */
  51 #endif
  52 };
  53
  54 /* Server capabilities */
  55 #define NFS_CAP_READDIRPLUS     (1U << 0)
  56 #define NFS_CAP_HARDLINKS       (1U << 1)
  57 #define NFS_CAP_SYMLINKS        (1U << 2)
  58 #define NFS_CAP_ACLS            (1U << 3)
  59 #define NFS_CAP_ATOMIC_OPEN     (1U << 4)
  60
  61 #endif