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