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/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 struct nfs4_sequence_args;
  16 struct nfs4_sequence_res;
  17 struct nfs_server;
  18
  19 /*
  20  * The nfs_client identifies our client state to the server.
  21  */
  22 struct nfs_client {
  23         atomic_t                cl_count;
  24         int                     cl_cons_state;  /* current construction state (-ve: init error) */
  25 #define NFS_CS_READY            0               /* ready to be used */
  26 #define NFS_CS_INITING          1               /* busy initialising */
  27 #define NFS_CS_SESSION_INITING  2               /* busy initialising  session */
  28         unsigned long           cl_res_state;   /* NFS resources state */
  29 #define NFS_CS_CALLBACK         1               /* - callback started */
  30 #define NFS_CS_IDMAP            2               /* - idmap started */
  31 #define NFS_CS_RENEWD           3               /* - renewd started */
  32         struct sockaddr_storage cl_addr;        /* server identifier */
  33         size_t                  cl_addrlen;
  34         char *                  cl_hostname;    /* hostname of server */
  35         struct list_head        cl_share_link;  /* link in global client list */
  36         struct list_head        cl_superblocks; /* List of nfs_server structs */
  37
  38         struct rpc_clnt *       cl_rpcclient;
  39         const struct nfs_rpc_ops *rpc_ops;      /* NFS protocol vector */
  40         int                     cl_proto;       /* Network transport protocol */
  41
  42         u32                     cl_minorversion;/* NFSv4 minorversion */
  43         struct rpc_cred         *cl_machine_cred;
  44
  45 #ifdef CONFIG_NFS_V4
  46         u64                     cl_clientid;    /* constant */
  47         nfs4_verifier           cl_confirm;
  48         unsigned long           cl_state;
  49
  50         struct rb_root          cl_openowner_id;
  51         struct rb_root          cl_lockowner_id;
  52
  53         struct list_head        cl_delegations;
  54         struct rb_root          cl_state_owners;
  55         spinlock_t              cl_lock;
  56
  57         unsigned long           cl_lease_time;
  58         unsigned long           cl_last_renewal;
  59         struct delayed_work     cl_renewd;
  60
  61         struct rpc_wait_queue   cl_rpcwaitq;
  62
  63         /* used for the setclientid verifier */
  64         struct timespec         cl_boot_time;
  65
  66         /* idmapper */
  67         struct idmap *          cl_idmap;
  68
  69         /* Our own IP address, as a null-terminated string.
  70          * This is used to generate the clientid, and the callback address.
  71          */
  72         char                    cl_ipaddr[48];
  73         unsigned char           cl_id_uniquifier;
  74         int                  (* cl_call_sync)(struct nfs_server *server,
  75                                               struct rpc_message *msg,
  76                                               struct nfs4_sequence_args *args,
  77                                               struct nfs4_sequence_res *res,
  78                                               int cache_reply);
  79 #endif /* CONFIG_NFS_V4 */
  80
  81 #ifdef CONFIG_NFS_V4_1
  82         /* clientid returned from EXCHANGE_ID, used by session operations */
  83         u64                     cl_ex_clid;
  84         /* The sequence id to use for the next CREATE_SESSION */
  85         u32                     cl_seqid;
  86         /* The flags used for obtaining the clientid during EXCHANGE_ID */
  87         u32                     cl_exchange_flags;
  88         struct nfs4_session     *cl_session;    /* sharred session */
  89 #endif /* CONFIG_NFS_V4_1 */
  90
  91 #ifdef CONFIG_NFS_FSCACHE
  92         struct fscache_cookie   *fscache;       /* client index cache cookie */
  93 #endif
  94 };
  95
  96 /*
  97  * NFS client parameters stored in the superblock.
  98  */
  99 struct nfs_server {
 100         struct nfs_client *     nfs_client;     /* shared client and NFS4 state */
 101         struct list_head        client_link;    /* List of other nfs_server structs
 102                                                  * that share the same client
 103                                                  */
 104         struct list_head        master_link;    /* link in master servers list */
 105         struct rpc_clnt *       client;         /* RPC client handle */
 106         struct rpc_clnt *       client_acl;     /* ACL RPC client handle */
 107         struct nlm_host         *nlm_host;      /* NLM client handle */
 108         struct nfs_iostats *    io_stats;       /* I/O statistics */
 109         struct backing_dev_info backing_dev_info;
 110         atomic_long_t           writeback;      /* number of writeback pages */
 111         int                     flags;          /* various flags */
 112         unsigned int            caps;           /* server capabilities */
 113         unsigned int            rsize;          /* read size */
 114         unsigned int            rpages;         /* read size (in pages) */
 115         unsigned int            wsize;          /* write size */
 116         unsigned int            wpages;         /* write size (in pages) */
 117         unsigned int            wtmult;         /* server disk block size */
 118         unsigned int            dtsize;         /* readdir size */
 119         unsigned short          port;           /* "port=" setting */
 120         unsigned int            bsize;          /* server block size */
 121         unsigned int            acregmin;       /* attr cache timeouts */
 122         unsigned int            acregmax;
 123         unsigned int            acdirmin;
 124         unsigned int            acdirmax;
 125         unsigned int            namelen;
 126         unsigned int            options;        /* extra options enabled by mount */
 127 #define NFS_OPTION_FSCACHE      0x00000001      /* - local caching enabled */
 128
 129         struct nfs_fsid         fsid;
 130         __u64                   maxfilesize;    /* maximum file size */
 131         unsigned long           mount_time;     /* when this fs was mounted */
 132         dev_t                   s_dev;          /* superblock dev numbers */
 133
 134 #ifdef CONFIG_NFS_FSCACHE
 135         struct nfs_fscache_key  *fscache_key;   /* unique key for superblock */
 136         struct fscache_cookie   *fscache;       /* superblock cookie */
 137 #endif
 138
 139 #ifdef CONFIG_NFS_V4
 140         u32                     attr_bitmask[2];/* V4 bitmask representing the set
 141                                                    of attributes supported on this
 142                                                    filesystem */
 143         u32                     cache_consistency_bitmask[2];
 144                                                 /* V4 bitmask representing the subset
 145                                                    of change attribute, size, ctime
 146                                                    and mtime attributes supported by
 147                                                    the server */
 148         u32                     acl_bitmask;    /* V4 bitmask representing the ACEs
 149                                                    that are supported on this
 150                                                    filesystem */
 151 #endif
 152         void (*destroy)(struct nfs_server *);
 153
 154         atomic_t active; /* Keep trace of any activity to this server */
 155
 156         /* mountd-related mount options */
 157         struct sockaddr_storage mountd_address;
 158         size_t                  mountd_addrlen;
 159         u32                     mountd_version;
 160         unsigned short          mountd_port;
 161         unsigned short          mountd_protocol;
 162 };
 163
 164 /* Server capabilities */
 165 #define NFS_CAP_READDIRPLUS     (1U << 0)
 166 #define NFS_CAP_HARDLINKS       (1U << 1)
 167 #define NFS_CAP_SYMLINKS        (1U << 2)
 168 #define NFS_CAP_ACLS            (1U << 3)
 169 #define NFS_CAP_ATOMIC_OPEN     (1U << 4)
 170
 171
 172 /* maximum number of slots to use */
 173 #define NFS4_MAX_SLOT_TABLE RPC_MAX_SLOT_TABLE
 174
 175 #if defined(CONFIG_NFS_V4_1)
 176
 177 /* Sessions */
 178 #define SLOT_TABLE_SZ (NFS4_MAX_SLOT_TABLE/(8*sizeof(long)))
 179 struct nfs4_slot_table {
 180         struct nfs4_slot *slots;                /* seqid per slot */
 181         unsigned long   used_slots[SLOT_TABLE_SZ]; /* used/unused bitmap */
 182         spinlock_t      slot_tbl_lock;
 183         struct rpc_wait_queue   slot_tbl_waitq; /* allocators may wait here */
 184         int             max_slots;              /* # slots in table */
 185         int             highest_used_slotid;    /* sent to server on each SEQ.
 186                                                  * op for dynamic resizing */
 187 };
 188
 189 static inline int slot_idx(struct nfs4_slot_table *tbl, struct nfs4_slot *sp)
 190 {
 191         return sp - tbl->slots;
 192 }
 193
 194 /*
 195  * Session related parameters
 196  */
 197 struct nfs4_session {
 198         struct nfs4_sessionid           sess_id;
 199         u32                             flags;
 200         unsigned long                   session_state;
 201         u32                             hash_alg;
 202         u32                             ssv_len;
 203
 204         /* The fore and back channel */
 205         struct nfs4_channel_attrs       fc_attrs;
 206         struct nfs4_slot_table          fc_slot_table;
 207         struct nfs4_channel_attrs       bc_attrs;
 208         struct nfs4_slot_table          bc_slot_table;
 209         struct nfs_client               *clp;
 210 };
 211
 212 #endif /* CONFIG_NFS_V4_1 */
 213 #endif