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