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/idr.h>
   7 #include <linux/wait.h>
   8 #include <linux/nfs_xdr.h>
   9 #include <linux/sunrpc/xprt.h>
  10
  11 #include <linux/atomic.h>
  12
  13 struct nfs4_session;
  14 struct nfs_iostats;
  15 struct nlm_host;
  16 struct nfs4_sequence_args;
  17 struct nfs4_sequence_res;
  18 struct nfs_server;
  19 struct nfs4_minor_version_ops;
  20 struct nfs41_server_scope;
  21 struct nfs41_impl_id;
  22
  23 /*
  24  * The nfs_client identifies our client state to the server.
  25  */
  26 struct nfs_client {
  27         atomic_t                cl_count;
  28         int                     cl_cons_state;  /* current construction state (-ve: init error) */
  29 #define NFS_CS_READY            0               /* ready to be used */
  30 #define NFS_CS_INITING          1               /* busy initialising */
  31 #define NFS_CS_SESSION_INITING  2               /* busy initialising  session */
  32         unsigned long           cl_res_state;   /* NFS resources state */
  33 #define NFS_CS_CALLBACK         1               /* - callback started */
  34 #define NFS_CS_IDMAP            2               /* - idmap started */
  35 #define NFS_CS_RENEWD           3               /* - renewd started */
  36 #define NFS_CS_STOP_RENEW       4               /* no more state to renew */
  37 #define NFS_CS_CHECK_LEASE_TIME 5               /* need to check lease time */
  38         unsigned long           cl_flags;       /* behavior switches */
  39 #define NFS_CS_NORESVPORT       0               /* - use ephemeral src port */
  40 #define NFS_CS_DISCRTRY         1               /* - disconnect on RPC retry */
  41         struct sockaddr_storage cl_addr;        /* server identifier */
  42         size_t                  cl_addrlen;
  43         char *                  cl_hostname;    /* hostname of server */
  44         struct list_head        cl_share_link;  /* link in global client list */
  45         struct list_head        cl_superblocks; /* List of nfs_server structs */
  46
  47         struct rpc_clnt *       cl_rpcclient;
  48         const struct nfs_rpc_ops *rpc_ops;      /* NFS protocol vector */
  49         int                     cl_proto;       /* Network transport protocol */
  50
  51         u32                     cl_minorversion;/* NFSv4 minorversion */
  52         struct rpc_cred         *cl_machine_cred;
  53
  54 #ifdef CONFIG_NFS_V4
  55         u64                     cl_clientid;    /* constant */
  56         nfs4_verifier           cl_confirm;     /* Clientid verifier */
  57         unsigned long           cl_state;
  58
  59         spinlock_t              cl_lock;
  60
  61         unsigned long           cl_lease_time;
  62         unsigned long           cl_last_renewal;
  63         struct delayed_work     cl_renewd;
  64
  65         struct rpc_wait_queue   cl_rpcwaitq;
  66
  67         /* idmapper */
  68         struct idmap *          cl_idmap;
  69
  70         /* Our own IP address, as a null-terminated string.
  71          * This is used to generate the clientid, and the callback address.
  72          */
  73         char                    cl_ipaddr[48];
  74         unsigned char           cl_id_uniquifier;
  75         u32                     cl_cb_ident;    /* v4.0 callback identifier */
  76         const struct nfs4_minor_version_ops *cl_mvops;
  77
  78         /* The sequence id to use for the next CREATE_SESSION */
  79         u32                     cl_seqid;
  80         /* The flags used for obtaining the clientid during EXCHANGE_ID */
  81         u32                     cl_exchange_flags;
  82         struct nfs4_session     *cl_session;    /* shared session */
  83         struct nfs41_server_owner *cl_serverowner;
  84         struct nfs41_server_scope *cl_serverscope;
  85         struct nfs41_impl_id    *cl_implid;
  86 #endif /* CONFIG_NFS_V4 */
  87
  88 #ifdef CONFIG_NFS_FSCACHE
  89         struct fscache_cookie   *fscache;       /* client index cache cookie */
  90 #endif
  91
  92         struct net              *cl_net;
  93 };
  94
  95 /*
  96  * NFS client parameters stored in the superblock.
  97  */
  98 struct nfs_server {
  99         struct nfs_client *     nfs_client;     /* shared client and NFS4 state */
 100         struct list_head        client_link;    /* List of other nfs_server structs
 101                                                  * that share the same client
 102                                                  */
 103         struct list_head        master_link;    /* link in master servers list */
 104         struct rpc_clnt *       client;         /* RPC client handle */
 105         struct rpc_clnt *       client_acl;     /* ACL RPC client handle */
 106         struct nlm_host         *nlm_host;      /* NLM client handle */
 107         struct nfs_iostats __percpu *io_stats;  /* I/O statistics */
 108         struct backing_dev_info backing_dev_info;
 109         atomic_long_t           writeback;      /* number of writeback pages */
 110         int                     flags;          /* various flags */
 111         unsigned int            caps;           /* server capabilities */
 112         unsigned int            rsize;          /* read size */
 113         unsigned int            rpages;         /* read size (in pages) */
 114         unsigned int            wsize;          /* write size */
 115         unsigned int            wpages;         /* write size (in pages) */
 116         unsigned int            wtmult;         /* server disk block size */
 117         unsigned int            dtsize;         /* readdir size */
 118         unsigned short          port;           /* "port=" setting */
 119         unsigned int            bsize;          /* server block size */
 120         unsigned int            acregmin;       /* attr cache timeouts */
 121         unsigned int            acregmax;
 122         unsigned int            acdirmin;
 123         unsigned int            acdirmax;
 124         unsigned int            namelen;
 125         unsigned int            options;        /* extra options enabled by mount */
 126 #define NFS_OPTION_FSCACHE      0x00000001      /* - local caching enabled */
 127
 128         struct nfs_fsid         fsid;
 129         __u64                   maxfilesize;    /* maximum file size */
 130         struct timespec         time_delta;     /* smallest time granularity */
 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         u32                     pnfs_blksize;   /* layout_blksize attr */
 140 #ifdef CONFIG_NFS_V4
 141         u32                     attr_bitmask[3];/* V4 bitmask representing the set
 142                                                    of attributes supported on this
 143                                                    filesystem */
 144         u32                     cache_consistency_bitmask[2];
 145                                                 /* V4 bitmask representing the subset
 146                                                    of change attribute, size, ctime
 147                                                    and mtime attributes supported by
 148                                                    the server */
 149         u32                     acl_bitmask;    /* V4 bitmask representing the ACEs
 150                                                    that are supported on this
 151                                                    filesystem */
 152         u32                     fh_expire_type; /* V4 bitmask representing file
 153                                                    handle volatility type for
 154                                                    this filesystem */
 155         struct pnfs_layoutdriver_type  *pnfs_curr_ld; /* Active layout driver */
 156         struct rpc_wait_queue   roc_rpcwaitq;
 157         void                    *pnfs_ld_data;  /* per mount point data */
 158
 159         /* the following fields are protected by nfs_client->cl_lock */
 160         struct rb_root          state_owners;
 161 #endif
 162         struct ida              openowner_id;
 163         struct ida              lockowner_id;
 164         struct list_head        state_owners_lru;
 165         struct list_head        layouts;
 166         struct list_head        delegations;
 167         void (*destroy)(struct nfs_server *);
 168
 169         atomic_t active; /* Keep trace of any activity to this server */
 170
 171         /* mountd-related mount options */
 172         struct sockaddr_storage mountd_address;
 173         size_t                  mountd_addrlen;
 174         u32                     mountd_version;
 175         unsigned short          mountd_port;
 176         unsigned short          mountd_protocol;
 177 };
 178
 179 /* Server capabilities */
 180 #define NFS_CAP_READDIRPLUS     (1U << 0)
 181 #define NFS_CAP_HARDLINKS       (1U << 1)
 182 #define NFS_CAP_SYMLINKS        (1U << 2)
 183 #define NFS_CAP_ACLS            (1U << 3)
 184 #define NFS_CAP_ATOMIC_OPEN     (1U << 4)
 185 #define NFS_CAP_CHANGE_ATTR     (1U << 5)
 186 #define NFS_CAP_FILEID          (1U << 6)
 187 #define NFS_CAP_MODE            (1U << 7)
 188 #define NFS_CAP_NLINK           (1U << 8)
 189 #define NFS_CAP_OWNER           (1U << 9)
 190 #define NFS_CAP_OWNER_GROUP     (1U << 10)
 191 #define NFS_CAP_ATIME           (1U << 11)
 192 #define NFS_CAP_CTIME           (1U << 12)
 193 #define NFS_CAP_MTIME           (1U << 13)
 194 #define NFS_CAP_POSIX_LOCK      (1U << 14)
 195 #define NFS_CAP_UIDGID_NOMAP    (1U << 15)
 196
 197
 198 /* maximum number of slots to use */
 199 #define NFS4_DEF_SLOT_TABLE_SIZE (16U)
 200 #define NFS4_MAX_SLOT_TABLE (256U)
 201 #define NFS4_NO_SLOT ((u32)-1)
 202
 203 #if defined(CONFIG_NFS_V4)
 204
 205 /* Sessions */
 206 #define SLOT_TABLE_SZ DIV_ROUND_UP(NFS4_MAX_SLOT_TABLE, 8*sizeof(long))
 207 struct nfs4_slot_table {
 208         struct nfs4_slot *slots;                /* seqid per slot */
 209         unsigned long   used_slots[SLOT_TABLE_SZ]; /* used/unused bitmap */
 210         spinlock_t      slot_tbl_lock;
 211         struct rpc_wait_queue   slot_tbl_waitq; /* allocators may wait here */
 212         u32             max_slots;              /* # slots in table */
 213         u32             highest_used_slotid;    /* sent to server on each SEQ.
 214                                                  * op for dynamic resizing */
 215         u32             target_max_slots;       /* Set by CB_RECALL_SLOT as
 216                                                  * the new max_slots */
 217         struct completion complete;
 218 };
 219
 220 static inline int slot_idx(struct nfs4_slot_table *tbl, struct nfs4_slot *sp)
 221 {
 222         return sp - tbl->slots;
 223 }
 224
 225 /*
 226  * Session related parameters
 227  */
 228 struct nfs4_session {
 229         struct nfs4_sessionid           sess_id;
 230         u32                             flags;
 231         unsigned long                   session_state;
 232         u32                             hash_alg;
 233         u32                             ssv_len;
 234
 235         /* The fore and back channel */
 236         struct nfs4_channel_attrs       fc_attrs;
 237         struct nfs4_slot_table          fc_slot_table;
 238         struct nfs4_channel_attrs       bc_attrs;
 239         struct nfs4_slot_table          bc_slot_table;
 240         struct nfs_client               *clp;
 241 };
 242
 243 #endif /* CONFIG_NFS_V4 */
 244 #endif