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 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         struct sockaddr_storage cl_addr;        /* server identifier */
  39         size_t                  cl_addrlen;
  40         char *                  cl_hostname;    /* hostname of server */
  41         struct list_head        cl_share_link;  /* link in global client list */
  42         struct list_head        cl_superblocks; /* List of nfs_server structs */
  43
  44         struct rpc_clnt *       cl_rpcclient;
  45         const struct nfs_rpc_ops *rpc_ops;      /* NFS protocol vector */
  46         int                     cl_proto;       /* Network transport protocol */
  47
  48         u32                     cl_minorversion;/* NFSv4 minorversion */
  49         struct rpc_cred         *cl_machine_cred;
  50
  51 #ifdef CONFIG_NFS_V4
  52         u64                     cl_clientid;    /* constant */
  53         nfs4_verifier           cl_confirm;     /* Clientid verifier */
  54         unsigned long           cl_state;
  55
  56         spinlock_t              cl_lock;
  57
  58         unsigned long           cl_lease_time;
  59         unsigned long           cl_last_renewal;
  60         struct delayed_work     cl_renewd;
  61
  62         struct rpc_wait_queue   cl_rpcwaitq;
  63
  64         /* used for the setclientid verifier */
  65         struct timespec         cl_boot_time;
  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;    /* sharred session */
  83 #endif /* CONFIG_NFS_V4 */
  84
  85 #ifdef CONFIG_NFS_FSCACHE
  86         struct fscache_cookie   *fscache;       /* client index cache cookie */
  87 #endif
  88
  89         struct server_scope     *server_scope;  /* from exchange_id */
  90         struct nfs41_impl_id    *impl_id;       /* from exchange_id */
  91         struct net              *net;
  92 };
  93
  94 /*
  95  * NFS client parameters stored in the superblock.
  96  */
  97 struct nfs_server {
  98         struct nfs_client *     nfs_client;     /* shared client and NFS4 state */
  99         struct list_head        client_link;    /* List of other nfs_server structs
 100                                                  * that share the same client
 101                                                  */
 102         struct list_head        master_link;    /* link in master servers list */
 103         struct rpc_clnt *       client;         /* RPC client handle */
 104         struct rpc_clnt *       client_acl;     /* ACL RPC client handle */
 105         struct nlm_host         *nlm_host;      /* NLM client handle */
 106         struct nfs_iostats __percpu *io_stats;  /* I/O statistics */
 107         struct backing_dev_info backing_dev_info;
 108         atomic_long_t           writeback;      /* number of writeback pages */
 109         int                     flags;          /* various flags */
 110         unsigned int            caps;           /* server capabilities */
 111         unsigned int            rsize;          /* read size */
 112         unsigned int            rpages;         /* read size (in pages) */
 113         unsigned int            wsize;          /* write size */
 114         unsigned int            wpages;         /* write size (in pages) */
 115         unsigned int            wtmult;         /* server disk block size */
 116         unsigned int            dtsize;         /* readdir size */
 117         unsigned short          port;           /* "port=" setting */
 118         unsigned int            bsize;          /* server block size */
 119         unsigned int            acregmin;       /* attr cache timeouts */
 120         unsigned int            acregmax;
 121         unsigned int            acdirmin;
 122         unsigned int            acdirmax;
 123         unsigned int            namelen;
 124         unsigned int            options;        /* extra options enabled by mount */
 125 #define NFS_OPTION_FSCACHE      0x00000001      /* - local caching enabled */
 126
 127         struct nfs_fsid         fsid;
 128         __u64                   maxfilesize;    /* maximum file size */
 129         struct timespec         time_delta;     /* smallest time granularity */
 130         unsigned long           mount_time;     /* when this fs was mounted */
 131         dev_t                   s_dev;          /* superblock dev numbers */
 132
 133 #ifdef CONFIG_NFS_FSCACHE
 134         struct nfs_fscache_key  *fscache_key;   /* unique key for superblock */
 135         struct fscache_cookie   *fscache;       /* superblock cookie */
 136 #endif
 137
 138         u32                     pnfs_blksize;   /* layout_blksize attr */
 139 #ifdef CONFIG_NFS_V4
 140         u32                     attr_bitmask[3];/* 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         u32                     fh_expire_type; /* V4 bitmask representing file
 152                                                    handle volatility type for
 153                                                    this filesystem */
 154         struct pnfs_layoutdriver_type  *pnfs_curr_ld; /* Active layout driver */
 155         struct rpc_wait_queue   roc_rpcwaitq;
 156         void                    *pnfs_ld_data;  /* per mount point data */
 157
 158         /* the following fields are protected by nfs_client->cl_lock */
 159         struct rb_root          state_owners;
 160 #endif
 161         struct ida              openowner_id;
 162         struct ida              lockowner_id;
 163         struct list_head        state_owners_lru;
 164         struct list_head        layouts;
 165         struct list_head        delegations;
 166         void (*destroy)(struct nfs_server *);
 167
 168         atomic_t active; /* Keep trace of any activity to this server */
 169
 170         /* mountd-related mount options */
 171         struct sockaddr_storage mountd_address;
 172         size_t                  mountd_addrlen;
 173         u32                     mountd_version;
 174         unsigned short          mountd_port;
 175         unsigned short          mountd_protocol;
 176 };
 177
 178 /* Server capabilities */
 179 #define NFS_CAP_READDIRPLUS     (1U << 0)
 180 #define NFS_CAP_HARDLINKS       (1U << 1)
 181 #define NFS_CAP_SYMLINKS        (1U << 2)
 182 #define NFS_CAP_ACLS            (1U << 3)
 183 #define NFS_CAP_ATOMIC_OPEN     (1U << 4)
 184 #define NFS_CAP_CHANGE_ATTR     (1U << 5)
 185 #define NFS_CAP_FILEID          (1U << 6)
 186 #define NFS_CAP_MODE            (1U << 7)
 187 #define NFS_CAP_NLINK           (1U << 8)
 188 #define NFS_CAP_OWNER           (1U << 9)
 189 #define NFS_CAP_OWNER_GROUP     (1U << 10)
 190 #define NFS_CAP_ATIME           (1U << 11)
 191 #define NFS_CAP_CTIME           (1U << 12)
 192 #define NFS_CAP_MTIME           (1U << 13)
 193 #define NFS_CAP_POSIX_LOCK      (1U << 14)
 194 #define NFS_CAP_UIDGID_NOMAP    (1U << 15)
 195
 196
 197 /* maximum number of slots to use */
 198 #define NFS4_DEF_SLOT_TABLE_SIZE (16U)
 199 #define NFS4_MAX_SLOT_TABLE (256U)
 200 #define NFS4_NO_SLOT ((u32)-1)
 201
 202 #if defined(CONFIG_NFS_V4)
 203
 204 /* Sessions */
 205 #define SLOT_TABLE_SZ DIV_ROUND_UP(NFS4_MAX_SLOT_TABLE, 8*sizeof(long))
 206 struct nfs4_slot_table {
 207         struct nfs4_slot *slots;                /* seqid per slot */
 208         unsigned long   used_slots[SLOT_TABLE_SZ]; /* used/unused bitmap */
 209         spinlock_t      slot_tbl_lock;
 210         struct rpc_wait_queue   slot_tbl_waitq; /* allocators may wait here */
 211         u32             max_slots;              /* # slots in table */
 212         u32             highest_used_slotid;    /* sent to server on each SEQ.
 213                                                  * op for dynamic resizing */
 214         u32             target_max_slots;       /* Set by CB_RECALL_SLOT as
 215                                                  * the new max_slots */
 216         struct completion complete;
 217 };
 218
 219 static inline int slot_idx(struct nfs4_slot_table *tbl, struct nfs4_slot *sp)
 220 {
 221         return sp - tbl->slots;
 222 }
 223
 224 /*
 225  * Session related parameters
 226  */
 227 struct nfs4_session {
 228         struct nfs4_sessionid           sess_id;
 229         u32                             flags;
 230         unsigned long                   session_state;
 231         u32                             hash_alg;
 232         u32                             ssv_len;
 233
 234         /* The fore and back channel */
 235         struct nfs4_channel_attrs       fc_attrs;
 236         struct nfs4_slot_table          fc_slot_table;
 237         struct nfs4_channel_attrs       bc_attrs;
 238         struct nfs4_slot_table          bc_slot_table;
 239         struct nfs_client               *clp;
 240 };
 241
 242 #endif /* CONFIG_NFS_V4 */
 243 #endif