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         struct sockaddr_in      cl_addr;        /* server identifier */
  23         char *                  cl_hostname;    /* hostname of server */
  24         struct list_head        cl_share_link;  /* link in global client list */
  25         struct list_head        cl_superblocks; /* List of nfs_server structs */
  26
  27         struct rpc_clnt *       cl_rpcclient;
  28
  29 #ifdef CONFIG_NFS_V4
  30         u64                     cl_clientid;    /* constant */
  31         nfs4_verifier           cl_confirm;
  32         unsigned long           cl_state;
  33
  34         u32                     cl_lockowner_id;
  35
  36         /*
  37          * The following rwsem ensures exclusive access to the server
  38          * while we recover the state following a lease expiration.
  39          */
  40         struct rw_semaphore     cl_sem;
  41
  42         struct list_head        cl_delegations;
  43         struct list_head        cl_state_owners;
  44         struct list_head        cl_unused;
  45         int                     cl_nunused;
  46         spinlock_t              cl_lock;
  47
  48         unsigned long           cl_lease_time;
  49         unsigned long           cl_last_renewal;
  50         struct work_struct      cl_renewd;
  51         struct work_struct      cl_recoverd;
  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[16];
  65         unsigned char           cl_id_uniquifier;
  66 #endif
  67 };
  68
  69 /*
  70  * NFS client parameters stored in the superblock.
  71  */
  72 struct nfs_server {
  73         struct rpc_clnt *       client;         /* RPC client handle */
  74         struct rpc_clnt *       client_sys;     /* 2nd handle for FSINFO */
  75         struct rpc_clnt *       client_acl;     /* ACL RPC client handle */
  76         struct nfs_rpc_ops *    rpc_ops;        /* NFS protocol vector */
  77         struct nfs_iostats *    io_stats;       /* I/O statistics */
  78         struct backing_dev_info backing_dev_info;
  79         int                     flags;          /* various flags */
  80         unsigned int            caps;           /* server capabilities */
  81         unsigned int            rsize;          /* read size */
  82         unsigned int            rpages;         /* read size (in pages) */
  83         unsigned int            wsize;          /* write size */
  84         unsigned int            wpages;         /* write size (in pages) */
  85         unsigned int            wtmult;         /* server disk block size */
  86         unsigned int            dtsize;         /* readdir size */
  87         unsigned int            bsize;          /* server block size */
  88         unsigned int            acregmin;       /* attr cache timeouts */
  89         unsigned int            acregmax;
  90         unsigned int            acdirmin;
  91         unsigned int            acdirmax;
  92         unsigned long           retrans_timeo;  /* retransmit timeout */
  93         unsigned int            retrans_count;  /* number of retransmit tries */
  94         unsigned int            namelen;
  95         char *                  hostname;       /* remote hostname */
  96         struct nfs_fh           fh;
  97         struct sockaddr_in      addr;
  98         struct nfs_fsid         fsid;
  99         unsigned long           mount_time;     /* when this fs was mounted */
 100 #ifdef CONFIG_NFS_V4
 101         /* Our own IP address, as a null-terminated string.
 102          * This is used to generate the clientid, and the callback address.
 103          */
 104         char                    ip_addr[16];
 105         char *                  mnt_path;
 106         struct nfs_client *     nfs_client;     /* all NFSv4 state starts here */
 107         struct list_head        nfs4_siblings;  /* List of other nfs_server structs
 108                                                  * that share the same clientid
 109                                                  */
 110         u32                     attr_bitmask[2];/* V4 bitmask representing the set
 111                                                    of attributes supported on this
 112                                                    filesystem */
 113         u32                     acl_bitmask;    /* V4 bitmask representing the ACEs
 114                                                    that are supported on this
 115                                                    filesystem */
 116 #endif
 117 };
 118
 119 /* Server capabilities */
 120 #define NFS_CAP_READDIRPLUS     (1U << 0)
 121 #define NFS_CAP_HARDLINKS       (1U << 1)
 122 #define NFS_CAP_SYMLINKS        (1U << 2)
 123 #define NFS_CAP_ACLS            (1U << 3)
 124 #define NFS_CAP_ATOMIC_OPEN     (1U << 4)
 125
 126 #endif