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         atomic_t                cl_mds_count;
  29         int                     cl_cons_state;  /* current construction state (-ve: init error) */
  30 #define NFS_CS_READY            0               /* ready to be used */
  31 #define NFS_CS_INITING          1               /* busy initialising */
  32 #define NFS_CS_SESSION_INITING  2               /* busy initialising  session */
  33         unsigned long           cl_res_state;   /* NFS resources state */
  34 #define NFS_CS_CALLBACK         1               /* - callback started */
  35 #define NFS_CS_IDMAP            2               /* - idmap started */
  36 #define NFS_CS_RENEWD           3               /* - renewd started */
  37 #define NFS_CS_STOP_RENEW       4               /* no more state to renew */
  38 #define NFS_CS_CHECK_LEASE_TIME 5               /* need to check lease time */
  39         unsigned long           cl_flags;       /* behavior switches */
  40 #define NFS_CS_NORESVPORT       0               /* - use ephemeral src port */
  41 #define NFS_CS_DISCRTRY         1               /* - disconnect on RPC retry */
  42 #define NFS_CS_MIGRATION        2               /* - transparent state migr */
  43         struct sockaddr_storage cl_addr;        /* server identifier */
  44         size_t                  cl_addrlen;
  45         char *                  cl_hostname;    /* hostname of server */
  46         struct list_head        cl_share_link;  /* link in global client list */
  47         struct list_head        cl_superblocks; /* List of nfs_server structs */
  48
  49         struct rpc_clnt *       cl_rpcclient;
  50         const struct nfs_rpc_ops *rpc_ops;      /* NFS protocol vector */
  51         int                     cl_proto;       /* Network transport protocol */
  52         struct nfs_subversion * cl_nfs_mod;     /* pointer to nfs version module */
  53
  54         u32                     cl_minorversion;/* NFSv4 minorversion */
  55         struct rpc_cred         *cl_machine_cred;
  56
  57 #if IS_ENABLED(CONFIG_NFS_V4)
  58         u64                     cl_clientid;    /* constant */
  59         nfs4_verifier           cl_confirm;     /* Clientid verifier */
  60         unsigned long           cl_state;
  61
  62         spinlock_t              cl_lock;
  63
  64         unsigned long           cl_lease_time;
  65         unsigned long           cl_last_renewal;
  66         struct delayed_work     cl_renewd;
  67
  68         struct rpc_wait_queue   cl_rpcwaitq;
  69
  70         /* idmapper */
  71         struct idmap *          cl_idmap;
  72
  73         /* Our own IP address, as a null-terminated string.
  74          * This is used to generate the mv0 callback address.
  75          */
  76         char                    cl_ipaddr[48];
  77         u32                     cl_cb_ident;    /* v4.0 callback identifier */
  78         const struct nfs4_minor_version_ops *cl_mvops;
  79
  80         /* The sequence id to use for the next CREATE_SESSION */
  81         u32                     cl_seqid;
  82         /* The flags used for obtaining the clientid during EXCHANGE_ID */
  83         u32                     cl_exchange_flags;
  84         struct nfs4_session     *cl_session;    /* shared session */
  85         bool                    cl_preserve_clid;
  86         struct nfs41_server_owner *cl_serverowner;
  87         struct nfs41_server_scope *cl_serverscope;
  88         struct nfs41_impl_id    *cl_implid;
  89 #endif /* CONFIG_NFS_V4 */
  90
  91 #ifdef CONFIG_NFS_FSCACHE
  92         struct fscache_cookie   *fscache;       /* client index cache cookie */
  93 #endif
  94
  95         struct net              *cl_net;
  96 };
  97
  98 /*
  99  * NFS client parameters stored in the superblock.
 100  */
 101 struct nfs_server {
 102         struct nfs_client *     nfs_client;     /* shared client and NFS4 state */
 103         struct list_head        client_link;    /* List of other nfs_server structs
 104                                                  * that share the same client
 105                                                  */
 106         struct list_head        master_link;    /* link in master servers list */
 107         struct rpc_clnt *       client;         /* RPC client handle */
 108         struct rpc_clnt *       client_acl;     /* ACL RPC client handle */
 109         struct nlm_host         *nlm_host;      /* NLM client handle */
 110         struct nfs_iostats __percpu *io_stats;  /* I/O statistics */
 111         struct backing_dev_info backing_dev_info;
 112         atomic_long_t           writeback;      /* number of writeback pages */
 113         int                     flags;          /* various flags */
 114         unsigned int            caps;           /* server capabilities */
 115         unsigned int            rsize;          /* read size */
 116         unsigned int            rpages;         /* read size (in pages) */
 117         unsigned int            wsize;          /* write size */
 118         unsigned int            wpages;         /* write size (in pages) */
 119         unsigned int            wtmult;         /* server disk block size */
 120         unsigned int            dtsize;         /* readdir size */
 121         unsigned short          port;           /* "port=" setting */
 122         unsigned int            bsize;          /* server block size */
 123         unsigned int            acregmin;       /* attr cache timeouts */
 124         unsigned int            acregmax;
 125         unsigned int            acdirmin;
 126         unsigned int            acdirmax;
 127         unsigned int            namelen;
 128         unsigned int            options;        /* extra options enabled by mount */
 129 #define NFS_OPTION_FSCACHE      0x00000001      /* - local caching enabled */
 130 #define NFS_OPTION_MIGRATION    0x00000002      /* - NFSv4 migration enabled */
 131
 132         struct nfs_fsid         fsid;
 133         __u64                   maxfilesize;    /* maximum file size */
 134         struct timespec         time_delta;     /* smallest time granularity */
 135         unsigned long           mount_time;     /* when this fs was mounted */
 136         dev_t                   s_dev;          /* superblock dev numbers */
 137
 138 #ifdef CONFIG_NFS_FSCACHE
 139         struct nfs_fscache_key  *fscache_key;   /* unique key for superblock */
 140         struct fscache_cookie   *fscache;       /* superblock cookie */
 141 #endif
 142
 143         u32                     pnfs_blksize;   /* layout_blksize attr */
 144 #if IS_ENABLED(CONFIG_NFS_V4)
 145         u32                     attr_bitmask[3];/* V4 bitmask representing the set
 146                                                    of attributes supported on this
 147                                                    filesystem */
 148         u32                     cache_consistency_bitmask[2];
 149                                                 /* V4 bitmask representing the subset
 150                                                    of change attribute, size, ctime
 151                                                    and mtime attributes supported by
 152                                                    the server */
 153         u32                     acl_bitmask;    /* V4 bitmask representing the ACEs
 154                                                    that are supported on this
 155                                                    filesystem */
 156         u32                     fh_expire_type; /* V4 bitmask representing file
 157                                                    handle volatility type for
 158                                                    this filesystem */
 159         struct pnfs_layoutdriver_type  *pnfs_curr_ld; /* Active layout driver */
 160         struct rpc_wait_queue   roc_rpcwaitq;
 161         void                    *pnfs_ld_data;  /* per mount point data */
 162
 163         /* the following fields are protected by nfs_client->cl_lock */
 164         struct rb_root          state_owners;
 165 #endif
 166         struct ida              openowner_id;
 167         struct ida              lockowner_id;
 168         struct list_head        state_owners_lru;
 169         struct list_head        layouts;
 170         struct list_head        delegations;
 171         void (*destroy)(struct nfs_server *);
 172
 173         atomic_t active; /* Keep trace of any activity to this server */
 174
 175         /* mountd-related mount options */
 176         struct sockaddr_storage mountd_address;
 177         size_t                  mountd_addrlen;
 178         u32                     mountd_version;
 179         unsigned short          mountd_port;
 180         unsigned short          mountd_protocol;
 181 };
 182
 183 /* Server capabilities */
 184 #define NFS_CAP_READDIRPLUS     (1U << 0)
 185 #define NFS_CAP_HARDLINKS       (1U << 1)
 186 #define NFS_CAP_SYMLINKS        (1U << 2)
 187 #define NFS_CAP_ACLS            (1U << 3)
 188 #define NFS_CAP_ATOMIC_OPEN     (1U << 4)
 189 #define NFS_CAP_CHANGE_ATTR     (1U << 5)
 190 #define NFS_CAP_FILEID          (1U << 6)
 191 #define NFS_CAP_MODE            (1U << 7)
 192 #define NFS_CAP_NLINK           (1U << 8)
 193 #define NFS_CAP_OWNER           (1U << 9)
 194 #define NFS_CAP_OWNER_GROUP     (1U << 10)
 195 #define NFS_CAP_ATIME           (1U << 11)
 196 #define NFS_CAP_CTIME           (1U << 12)
 197 #define NFS_CAP_MTIME           (1U << 13)
 198 #define NFS_CAP_POSIX_LOCK      (1U << 14)
 199 #define NFS_CAP_UIDGID_NOMAP    (1U << 15)
 200
 201 #endif