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 <linux/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 struct nfs4_minor_version_ops;
  19 struct server_scope;
  20
  21 /*
  22  * The nfs_client identifies our client state to the server.
  23  */
  24 struct nfs_client {
  25         atomic_t                cl_count;
  26         int                     cl_cons_state;  /* current construction state (-ve: init error) */
  27 #define NFS_CS_READY            0               /* ready to be used */
  28 #define NFS_CS_INITING          1               /* busy initialising */
  29 #define NFS_CS_SESSION_INITING  2               /* busy initialising  session */
  30         unsigned long           cl_res_state;   /* NFS resources state */
  31 #define NFS_CS_CALLBACK         1               /* - callback started */
  32 #define NFS_CS_IDMAP            2               /* - idmap started */
  33 #define NFS_CS_RENEWD           3               /* - renewd started */
  34 #define NFS_CS_STOP_RENEW       4               /* no more state to renew */
  35 #define NFS_CS_CHECK_LEASE_TIME 5               /* need to check lease time */
  36         struct sockaddr_storage cl_addr;        /* server identifier */
  37         size_t                  cl_addrlen;
  38         char *                  cl_hostname;    /* hostname of server */
  39         struct list_head        cl_share_link;  /* link in global client list */
  40         struct list_head        cl_superblocks; /* List of nfs_server structs */
  41
  42         struct rpc_clnt *       cl_rpcclient;
  43         const struct nfs_rpc_ops *rpc_ops;      /* NFS protocol vector */
  44         int                     cl_proto;       /* Network transport protocol */
  45
  46         u32                     cl_minorversion;/* NFSv4 minorversion */
  47         struct rpc_cred         *cl_machine_cred;
  48
  49 #ifdef CONFIG_NFS_V4
  50         u64                     cl_clientid;    /* constant */
  51         nfs4_verifier           cl_confirm;     /* Clientid verifier */
  52         unsigned long           cl_state;
  53
  54         spinlock_t              cl_lock;
  55
  56         unsigned long           cl_lease_time;
  57         unsigned long           cl_last_renewal;
  58         struct delayed_work     cl_renewd;
  59
  60         struct rpc_wait_queue   cl_rpcwaitq;
  61
  62         /* used for the setclientid verifier */
  63         struct timespec         cl_boot_time;
  64
  65         /* idmapper */
  66         struct idmap *          cl_idmap;
  67
  68         /* Our own IP address, as a null-terminated string.
  69          * This is used to generate the clientid, and the callback address.
  70          */
  71         char                    cl_ipaddr[48];
  72         unsigned char           cl_id_uniquifier;
  73         u32                     cl_cb_ident;    /* v4.0 callback identifier */
  74         const struct nfs4_minor_version_ops *cl_mvops;
  75
  76         /* The sequence id to use for the next CREATE_SESSION */
  77         u32                     cl_seqid;
  78         /* The flags used for obtaining the clientid during EXCHANGE_ID */
  79         u32                     cl_exchange_flags;
  80         struct nfs4_session     *cl_session;    /* sharred session */
  81 #endif /* CONFIG_NFS_V4 */
  82
  83 #ifdef CONFIG_NFS_FSCACHE
  84         struct fscache_cookie   *fscache;       /* client index cache cookie */
  85 #endif
  86
  87         struct server_scope     *server_scope;  /* from exchange_id */
  88 };
  89
  90 /*
  91  * NFS client parameters stored in the superblock.
  92  */
  93 struct nfs_server {
  94         struct nfs_client *     nfs_client;     /* shared client and NFS4 state */
  95         struct list_head        client_link;    /* List of other nfs_server structs
  96                                                  * that share the same client
  97                                                  */
  98         struct list_head        master_link;    /* link in master servers list */
  99         struct rpc_clnt *       client;         /* RPC client handle */
 100         struct rpc_clnt *       client_acl;     /* ACL RPC client handle */
 101         struct nlm_host         *nlm_host;      /* NLM client handle */
 102         struct nfs_iostats __percpu *io_stats;  /* I/O statistics */
 103         struct backing_dev_info backing_dev_info;
 104         atomic_long_t           writeback;      /* number of writeback pages */
 105         int                     flags;          /* various flags */
 106         unsigned int            caps;           /* server capabilities */
 107         unsigned int            rsize;          /* read size */
 108         unsigned int            rpages;         /* read size (in pages) */
 109         unsigned int            wsize;          /* write size */
 110         unsigned int            wpages;         /* write size (in pages) */
 111         unsigned int            wtmult;         /* server disk block size */
 112         unsigned int            dtsize;         /* readdir size */
 113         unsigned short          port;           /* "port=" setting */
 114         unsigned int            bsize;          /* server block size */
 115         unsigned int            acregmin;       /* attr cache timeouts */
 116         unsigned int            acregmax;
 117         unsigned int            acdirmin;
 118         unsigned int            acdirmax;
 119         unsigned int            namelen;
 120         unsigned int            options;        /* extra options enabled by mount */
 121 #define NFS_OPTION_FSCACHE      0x00000001      /* - local caching enabled */
 122
 123         struct nfs_fsid         fsid;
 124         __u64                   maxfilesize;    /* maximum file size */
 125         struct timespec         time_delta;     /* smallest time granularity */
 126         unsigned long           mount_time;     /* when this fs was mounted */
 127         dev_t                   s_dev;          /* superblock dev numbers */
 128
 129 #ifdef CONFIG_NFS_FSCACHE
 130         struct nfs_fscache_key  *fscache_key;   /* unique key for superblock */
 131         struct fscache_cookie   *fscache;       /* superblock cookie */
 132 #endif
 133
 134 #ifdef CONFIG_NFS_V4
 135         u32                     attr_bitmask[3];/* V4 bitmask representing the set
 136                                                    of attributes supported on this
 137                                                    filesystem */
 138         u32                     cache_consistency_bitmask[2];
 139                                                 /* V4 bitmask representing the subset
 140                                                    of change attribute, size, ctime
 141                                                    and mtime attributes supported by
 142                                                    the server */
 143         u32                     acl_bitmask;    /* V4 bitmask representing the ACEs
 144                                                    that are supported on this
 145                                                    filesystem */
 146         struct pnfs_layoutdriver_type  *pnfs_curr_ld; /* Active layout driver */
 147         struct rpc_wait_queue   roc_rpcwaitq;
 148         u32                     pnfs_blksize;   /* layout_blksize attr */
 149         void                    *pnfs_ld_data;  /* per mount point data */
 150
 151         /* the following fields are protected by nfs_client->cl_lock */
 152         struct rb_root          state_owners;
 153         struct rb_root          openowner_id;
 154         struct rb_root          lockowner_id;
 155 #endif
 156         struct list_head        layouts;
 157         struct list_head        delegations;
 158         void (*destroy)(struct nfs_server *);
 159
 160         atomic_t active; /* Keep trace of any activity to this server */
 161
 162         /* mountd-related mount options */
 163         struct sockaddr_storage mountd_address;
 164         size_t                  mountd_addrlen;
 165         u32                     mountd_version;
 166         unsigned short          mountd_port;
 167         unsigned short          mountd_protocol;
 168 };
 169
 170 /* Server capabilities */
 171 #define NFS_CAP_READDIRPLUS     (1U << 0)
 172 #define NFS_CAP_HARDLINKS       (1U << 1)
 173 #define NFS_CAP_SYMLINKS        (1U << 2)
 174 #define NFS_CAP_ACLS            (1U << 3)
 175 #define NFS_CAP_ATOMIC_OPEN     (1U << 4)
 176 #define NFS_CAP_CHANGE_ATTR     (1U << 5)
 177 #define NFS_CAP_FILEID          (1U << 6)
 178 #define NFS_CAP_MODE            (1U << 7)
 179 #define NFS_CAP_NLINK           (1U << 8)
 180 #define NFS_CAP_OWNER           (1U << 9)
 181 #define NFS_CAP_OWNER_GROUP     (1U << 10)
 182 #define NFS_CAP_ATIME           (1U << 11)
 183 #define NFS_CAP_CTIME           (1U << 12)
 184 #define NFS_CAP_MTIME           (1U << 13)
 185 #define NFS_CAP_POSIX_LOCK      (1U << 14)
 186 #define NFS_CAP_UIDGID_NOMAP    (1U << 15)
 187
 188
 189 /* maximum number of slots to use */
 190 #define NFS4_MAX_SLOT_TABLE RPC_MAX_SLOT_TABLE
 191
 192 #if defined(CONFIG_NFS_V4)
 193
 194 /* Sessions */
 195 #define SLOT_TABLE_SZ (NFS4_MAX_SLOT_TABLE/(8*sizeof(long)))
 196 struct nfs4_slot_table {
 197         struct nfs4_slot *slots;                /* seqid per slot */
 198         unsigned long   used_slots[SLOT_TABLE_SZ]; /* used/unused bitmap */
 199         spinlock_t      slot_tbl_lock;
 200         struct rpc_wait_queue   slot_tbl_waitq; /* allocators may wait here */
 201         int             max_slots;              /* # slots in table */
 202         int             highest_used_slotid;    /* sent to server on each SEQ.
 203                                                  * op for dynamic resizing */
 204         int             target_max_slots;       /* Set by CB_RECALL_SLOT as
 205                                                  * the new max_slots */
 206         struct completion complete;
 207 };
 208
 209 static inline int slot_idx(struct nfs4_slot_table *tbl, struct nfs4_slot *sp)
 210 {
 211         return sp - tbl->slots;
 212 }
 213
 214 /*
 215  * Session related parameters
 216  */
 217 struct nfs4_session {
 218         struct nfs4_sessionid           sess_id;
 219         u32                             flags;
 220         unsigned long                   session_state;
 221         u32                             hash_alg;
 222         u32                             ssv_len;
 223
 224         /* The fore and back channel */
 225         struct nfs4_channel_attrs       fc_attrs;
 226         struct nfs4_slot_table          fc_slot_table;
 227         struct nfs4_channel_attrs       bc_attrs;
 228         struct nfs4_slot_table          bc_slot_table;
 229         struct nfs_client               *clp;
 230 };
 231
 232 #endif /* CONFIG_NFS_V4 */
 233 #endif