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 #define NFS_CS_INFINITE_SLOTS   3               /* - don't limit TCP slots */
  44         struct sockaddr_storage cl_addr;        /* server identifier */
  45         size_t                  cl_addrlen;
  46         char *                  cl_hostname;    /* hostname of server */
  47         struct list_head        cl_share_link;  /* link in global client list */
  48         struct list_head        cl_superblocks; /* List of nfs_server structs */
  49
  50         struct rpc_clnt *       cl_rpcclient;
  51         const struct nfs_rpc_ops *rpc_ops;      /* NFS protocol vector */
  52         int                     cl_proto;       /* Network transport protocol */
  53         struct nfs_subversion * cl_nfs_mod;     /* pointer to nfs version module */
  54
  55         u32                     cl_minorversion;/* NFSv4 minorversion */
  56         struct rpc_cred         *cl_machine_cred;
  57
  58 #if IS_ENABLED(CONFIG_NFS_V4)
  59         u64                     cl_clientid;    /* constant */
  60         nfs4_verifier           cl_confirm;     /* Clientid verifier */
  61         unsigned long           cl_state;
  62
  63         spinlock_t              cl_lock;
  64
  65         unsigned long           cl_lease_time;
  66         unsigned long           cl_last_renewal;
  67         struct delayed_work     cl_renewd;
  68
  69         struct rpc_wait_queue   cl_rpcwaitq;
  70
  71         /* idmapper */
  72         struct idmap *          cl_idmap;
  73
  74         /* Our own IP address, as a null-terminated string.
  75          * This is used to generate the mv0 callback address.
  76          */
  77         char                    cl_ipaddr[48];
  78         u32                     cl_cb_ident;    /* v4.0 callback identifier */
  79         const struct nfs4_minor_version_ops *cl_mvops;
  80
  81         /* The sequence id to use for the next CREATE_SESSION */
  82         u32                     cl_seqid;
  83         /* The flags used for obtaining the clientid during EXCHANGE_ID */
  84         u32                     cl_exchange_flags;
  85         struct nfs4_session     *cl_session;    /* shared session */
  86         bool                    cl_preserve_clid;
  87         struct nfs41_server_owner *cl_serverowner;
  88         struct nfs41_server_scope *cl_serverscope;
  89         struct nfs41_impl_id    *cl_implid;
  90 #endif /* CONFIG_NFS_V4 */
  91
  92 #ifdef CONFIG_NFS_FSCACHE
  93         struct fscache_cookie   *fscache;       /* client index cache cookie */
  94 #endif
  95
  96         struct net              *cl_net;
  97 };
  98
  99 /*
 100  * NFS client parameters stored in the superblock.
 101  */
 102 struct nfs_server {
 103         struct nfs_client *     nfs_client;     /* shared client and NFS4 state */
 104         struct list_head        client_link;    /* List of other nfs_server structs
 105                                                  * that share the same client
 106                                                  */
 107         struct list_head        master_link;    /* link in master servers list */
 108         struct rpc_clnt *       client;         /* RPC client handle */
 109         struct rpc_clnt *       client_acl;     /* ACL RPC client handle */
 110         struct nlm_host         *nlm_host;      /* NLM client handle */
 111         struct nfs_iostats __percpu *io_stats;  /* I/O statistics */
 112         struct backing_dev_info backing_dev_info;
 113         atomic_long_t           writeback;      /* number of writeback pages */
 114         int                     flags;          /* various flags */
 115         unsigned int            caps;           /* server capabilities */
 116         unsigned int            rsize;          /* read size */
 117         unsigned int            rpages;         /* read size (in pages) */
 118         unsigned int            wsize;          /* write size */
 119         unsigned int            wpages;         /* write size (in pages) */
 120         unsigned int            wtmult;         /* server disk block size */
 121         unsigned int            dtsize;         /* readdir size */
 122         unsigned short          port;           /* "port=" setting */
 123         unsigned int            bsize;          /* server block size */
 124         unsigned int            acregmin;       /* attr cache timeouts */
 125         unsigned int            acregmax;
 126         unsigned int            acdirmin;
 127         unsigned int            acdirmax;
 128         unsigned int            namelen;
 129         unsigned int            options;        /* extra options enabled by mount */
 130 #define NFS_OPTION_FSCACHE      0x00000001      /* - local caching enabled */
 131 #define NFS_OPTION_MIGRATION    0x00000002      /* - NFSv4 migration enabled */
 132
 133         struct nfs_fsid         fsid;
 134         __u64                   maxfilesize;    /* maximum file size */
 135         struct timespec         time_delta;     /* smallest time granularity */
 136         unsigned long           mount_time;     /* when this fs was mounted */
 137         dev_t                   s_dev;          /* superblock dev numbers */
 138
 139 #ifdef CONFIG_NFS_FSCACHE
 140         struct nfs_fscache_key  *fscache_key;   /* unique key for superblock */
 141         struct fscache_cookie   *fscache;       /* superblock cookie */
 142 #endif
 143
 144         u32                     pnfs_blksize;   /* layout_blksize attr */
 145 #if IS_ENABLED(CONFIG_NFS_V4)
 146         u32                     attr_bitmask[3];/* V4 bitmask representing the set
 147                                                    of attributes supported on this
 148                                                    filesystem */
 149         u32                     cache_consistency_bitmask[2];
 150                                                 /* V4 bitmask representing the subset
 151                                                    of change attribute, size, ctime
 152                                                    and mtime attributes supported by
 153                                                    the server */
 154         u32                     acl_bitmask;    /* V4 bitmask representing the ACEs
 155                                                    that are supported on this
 156                                                    filesystem */
 157         u32                     fh_expire_type; /* V4 bitmask representing file
 158                                                    handle volatility type for
 159                                                    this filesystem */
 160         struct pnfs_layoutdriver_type  *pnfs_curr_ld; /* Active layout driver */
 161         struct rpc_wait_queue   roc_rpcwaitq;
 162         void                    *pnfs_ld_data;  /* per mount point data */
 163
 164         /* the following fields are protected by nfs_client->cl_lock */
 165         struct rb_root          state_owners;
 166 #endif
 167         struct ida              openowner_id;
 168         struct ida              lockowner_id;
 169         struct list_head        state_owners_lru;
 170         struct list_head        layouts;
 171         struct list_head        delegations;
 172         void (*destroy)(struct nfs_server *);
 173
 174         atomic_t active; /* Keep trace of any activity to this server */
 175
 176         /* mountd-related mount options */
 177         struct sockaddr_storage mountd_address;
 178         size_t                  mountd_addrlen;
 179         u32                     mountd_version;
 180         unsigned short          mountd_port;
 181         unsigned short          mountd_protocol;
 182 };
 183
 184 /* Server capabilities */
 185 #define NFS_CAP_READDIRPLUS     (1U << 0)
 186 #define NFS_CAP_HARDLINKS       (1U << 1)
 187 #define NFS_CAP_SYMLINKS        (1U << 2)
 188 #define NFS_CAP_ACLS            (1U << 3)
 189 #define NFS_CAP_ATOMIC_OPEN     (1U << 4)
 190 #define NFS_CAP_CHANGE_ATTR     (1U << 5)
 191 #define NFS_CAP_FILEID          (1U << 6)
 192 #define NFS_CAP_MODE            (1U << 7)
 193 #define NFS_CAP_NLINK           (1U << 8)
 194 #define NFS_CAP_OWNER           (1U << 9)
 195 #define NFS_CAP_OWNER_GROUP     (1U << 10)
 196 #define NFS_CAP_ATIME           (1U << 11)
 197 #define NFS_CAP_CTIME           (1U << 12)
 198 #define NFS_CAP_MTIME           (1U << 13)
 199 #define NFS_CAP_POSIX_LOCK      (1U << 14)
 200 #define NFS_CAP_UIDGID_NOMAP    (1U << 15)
 201 #define NFS_CAP_STATEID_NFSV41  (1U << 16)
 202 #define NFS_CAP_ATOMIC_OPEN_V1  (1U << 17)
 203
 204 #endif