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/fscache.h>
   7
   8 struct nfs_iostats;
   9
  10 /*
  11  * The nfs_client identifies our client state to the server.
  12  */
  13 struct nfs_client {
  14         atomic_t                cl_count;
  15         int                     cl_cons_state;  /* current construction state (-ve: init error) */
  16 #define NFS_CS_READY            0               /* ready to be used */
  17 #define NFS_CS_INITING          1               /* busy initialising */
  18         int                     cl_nfsversion;  /* NFS protocol version */
  19         unsigned long           cl_res_state;   /* NFS resources state */
  20 #define NFS_CS_RPCIOD           0               /* - rpciod started */
  21 #define NFS_CS_CALLBACK         1               /* - callback started */
  22 #define NFS_CS_IDMAP            2               /* - idmap started */
  23 #define NFS_CS_RENEWD           3               /* - renewd started */
  24         struct sockaddr_in      cl_addr;        /* server identifier */
  25         char *                  cl_hostname;    /* hostname of server */
  26         struct list_head        cl_share_link;  /* link in global client list */
  27         struct list_head        cl_superblocks; /* List of nfs_server structs */
  28
  29         struct rpc_clnt *       cl_rpcclient;
  30         const struct nfs_rpc_ops *rpc_ops;      /* NFS protocol vector */
  31         unsigned long           retrans_timeo;  /* retransmit timeout */
  32         unsigned int            retrans_count;  /* number of retransmit tries */
  33
  34 #ifdef CONFIG_NFS_V4
  35         u64                     cl_clientid;    /* constant */
  36         nfs4_verifier           cl_confirm;
  37         unsigned long           cl_state;
  38
  39         u32                     cl_lockowner_id;
  40
  41         /*
  42          * The following rwsem ensures exclusive access to the server
  43          * while we recover the state following a lease expiration.
  44          */
  45         struct rw_semaphore     cl_sem;
  46
  47         struct list_head        cl_delegations;
  48         struct list_head        cl_state_owners;
  49         struct list_head        cl_unused;
  50         int                     cl_nunused;
  51         spinlock_t              cl_lock;
  52
  53         unsigned long           cl_lease_time;
  54         unsigned long           cl_last_renewal;
  55         struct work_struct      cl_renewd;
  56
  57         struct rpc_wait_queue   cl_rpcwaitq;
  58
  59         /* used for the setclientid verifier */
  60         struct timespec         cl_boot_time;
  61
  62         /* idmapper */
  63         struct idmap *          cl_idmap;
  64
  65         /* Our own IP address, as a null-terminated string.
  66          * This is used to generate the clientid, and the callback address.
  67          */
  68         char                    cl_ipaddr[16];
  69         unsigned char           cl_id_uniquifier;
  70 #endif
  71
  72 #ifdef CONFIG_NFS_FSCACHE
  73         struct fscache_cookie   *fscache;       /* client index cache cookie */
  74 #endif
  75 };
  76
  77 /*
  78  * NFS client parameters stored in the superblock.
  79  */
  80 struct nfs_server {
  81         struct nfs_client *     nfs_client;     /* shared client and NFS4 state */
  82         struct list_head        client_link;    /* List of other nfs_server structs
  83                                                  * that share the same client
  84                                                  */
  85         struct list_head        master_link;    /* link in master servers list */
  86         struct rpc_clnt *       client;         /* RPC client handle */
  87         struct rpc_clnt *       client_acl;     /* ACL RPC client handle */
  88         struct nfs_iostats *    io_stats;       /* I/O statistics */
  89         struct backing_dev_info backing_dev_info;
  90         int                     flags;          /* various flags */
  91         unsigned int            caps;           /* server capabilities */
  92         unsigned int            rsize;          /* read size */
  93         unsigned int            rpages;         /* read size (in pages) */
  94         unsigned int            wsize;          /* write size */
  95         unsigned int            wpages;         /* write size (in pages) */
  96         unsigned int            wtmult;         /* server disk block size */
  97         unsigned int            dtsize;         /* readdir size */
  98         unsigned int            bsize;          /* server block size */
  99         unsigned int            acregmin;       /* attr cache timeouts */
 100         unsigned int            acregmax;
 101         unsigned int            acdirmin;
 102         unsigned int            acdirmax;
 103         unsigned int            namelen;
 104
 105         struct nfs_fsid         fsid;
 106         __u64                   maxfilesize;    /* maximum file size */
 107         unsigned long           mount_time;     /* when this fs was mounted */
 108         dev_t                   s_dev;          /* superblock dev numbers */
 109
 110 #ifdef CONFIG_NFS_V4
 111         u32                     attr_bitmask[2];/* V4 bitmask representing the set
 112                                                    of attributes supported on this
 113                                                    filesystem */
 114         u32                     acl_bitmask;    /* V4 bitmask representing the ACEs
 115                                                    that are supported on this
 116                                                    filesystem */
 117 #endif
 118         void (*destroy)(struct nfs_server *);
 119 };
 120
 121 /* Server capabilities */
 122 #define NFS_CAP_READDIRPLUS     (1U << 0)
 123 #define NFS_CAP_HARDLINKS       (1U << 1)
 124 #define NFS_CAP_SYMLINKS        (1U << 2)
 125 #define NFS_CAP_ACLS            (1U << 3)
 126 #define NFS_CAP_ATOMIC_OPEN     (1U << 4)
 127
 128 #endif