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Linux/include/linux/nfs_fs_sb.h

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  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 #define NFS_CS_NO_RETRANS_TIMEOUT       4       /* - Disable retransmit timeouts */
 45         struct sockaddr_storage cl_addr;        /* server identifier */
 46         size_t                  cl_addrlen;
 47         char *                  cl_hostname;    /* hostname of server */
 48         char *                  cl_acceptor;    /* GSSAPI acceptor name */
 49         struct list_head        cl_share_link;  /* link in global client list */
 50         struct list_head        cl_superblocks; /* List of nfs_server structs */
 51 
 52         struct rpc_clnt *       cl_rpcclient;
 53         const struct nfs_rpc_ops *rpc_ops;      /* NFS protocol vector */
 54         int                     cl_proto;       /* Network transport protocol */
 55         struct nfs_subversion * cl_nfs_mod;     /* pointer to nfs version module */
 56 
 57         u32                     cl_minorversion;/* NFSv4 minorversion */
 58         struct rpc_cred         *cl_machine_cred;
 59 
 60 #if IS_ENABLED(CONFIG_NFS_V4)
 61         struct list_head        cl_ds_clients; /* auth flavor data servers */
 62         u64                     cl_clientid;    /* constant */
 63         nfs4_verifier           cl_confirm;     /* Clientid verifier */
 64         unsigned long           cl_state;
 65 
 66         spinlock_t              cl_lock;
 67 
 68         unsigned long           cl_lease_time;
 69         unsigned long           cl_last_renewal;
 70         struct delayed_work     cl_renewd;
 71 
 72         struct rpc_wait_queue   cl_rpcwaitq;
 73 
 74         /* idmapper */
 75         struct idmap *          cl_idmap;
 76 
 77         /* Client owner identifier */
 78         const char *            cl_owner_id;
 79 
 80         u32                     cl_cb_ident;    /* v4.0 callback identifier */
 81         const struct nfs4_minor_version_ops *cl_mvops;
 82         unsigned long           cl_mig_gen;
 83 
 84         /* NFSv4.0 transport blocking */
 85         struct nfs4_slot_table  *cl_slot_tbl;
 86 
 87         /* The sequence id to use for the next CREATE_SESSION */
 88         u32                     cl_seqid;
 89         /* The flags used for obtaining the clientid during EXCHANGE_ID */
 90         u32                     cl_exchange_flags;
 91         struct nfs4_session     *cl_session;    /* shared session */
 92         bool                    cl_preserve_clid;
 93         struct nfs41_server_owner *cl_serverowner;
 94         struct nfs41_server_scope *cl_serverscope;
 95         struct nfs41_impl_id    *cl_implid;
 96         /* nfs 4.1+ state protection modes: */
 97         unsigned long           cl_sp4_flags;
 98 #define NFS_SP4_MACH_CRED_MINIMAL  1    /* Minimal sp4_mach_cred - state ops
 99                                          * must use machine cred */
100 #define NFS_SP4_MACH_CRED_CLEANUP  2    /* CLOSE and LOCKU */
101 #define NFS_SP4_MACH_CRED_SECINFO  3    /* SECINFO and SECINFO_NO_NAME */
102 #define NFS_SP4_MACH_CRED_STATEID  4    /* TEST_STATEID and FREE_STATEID */
103 #define NFS_SP4_MACH_CRED_WRITE    5    /* WRITE */
104 #define NFS_SP4_MACH_CRED_COMMIT   6    /* COMMIT */
105 #define NFS_SP4_MACH_CRED_PNFS_CLEANUP  7 /* LAYOUTRETURN */
106 #endif /* CONFIG_NFS_V4 */
107 
108         /* Our own IP address, as a null-terminated string.
109          * This is used to generate the mv0 callback address.
110          */
111         char                    cl_ipaddr[48];
112 
113 #ifdef CONFIG_NFS_FSCACHE
114         struct fscache_cookie   *fscache;       /* client index cache cookie */
115 #endif
116 
117         struct net              *cl_net;
118 };
119 
120 /*
121  * NFS client parameters stored in the superblock.
122  */
123 struct nfs_server {
124         struct nfs_client *     nfs_client;     /* shared client and NFS4 state */
125         struct list_head        client_link;    /* List of other nfs_server structs
126                                                  * that share the same client
127                                                  */
128         struct list_head        master_link;    /* link in master servers list */
129         struct rpc_clnt *       client;         /* RPC client handle */
130         struct rpc_clnt *       client_acl;     /* ACL RPC client handle */
131         struct nlm_host         *nlm_host;      /* NLM client handle */
132         struct nfs_iostats __percpu *io_stats;  /* I/O statistics */
133         struct backing_dev_info backing_dev_info;
134         atomic_long_t           writeback;      /* number of writeback pages */
135         int                     flags;          /* various flags */
136         unsigned int            caps;           /* server capabilities */
137         unsigned int            rsize;          /* read size */
138         unsigned int            rpages;         /* read size (in pages) */
139         unsigned int            wsize;          /* write size */
140         unsigned int            wpages;         /* write size (in pages) */
141         unsigned int            wtmult;         /* server disk block size */
142         unsigned int            dtsize;         /* readdir size */
143         unsigned short          port;           /* "port=" setting */
144         unsigned int            bsize;          /* server block size */
145         unsigned int            acregmin;       /* attr cache timeouts */
146         unsigned int            acregmax;
147         unsigned int            acdirmin;
148         unsigned int            acdirmax;
149         unsigned int            namelen;
150         unsigned int            options;        /* extra options enabled by mount */
151         unsigned int            clone_blksize;  /* granularity of a CLONE operation */
152 #define NFS_OPTION_FSCACHE      0x00000001      /* - local caching enabled */
153 #define NFS_OPTION_MIGRATION    0x00000002      /* - NFSv4 migration enabled */
154 
155         struct nfs_fsid         fsid;
156         __u64                   maxfilesize;    /* maximum file size */
157         struct timespec         time_delta;     /* smallest time granularity */
158         unsigned long           mount_time;     /* when this fs was mounted */
159         struct super_block      *super;         /* VFS super block */
160         dev_t                   s_dev;          /* superblock dev numbers */
161         struct nfs_auth_info    auth_info;      /* parsed auth flavors */
162 
163 #ifdef CONFIG_NFS_FSCACHE
164         struct nfs_fscache_key  *fscache_key;   /* unique key for superblock */
165         struct fscache_cookie   *fscache;       /* superblock cookie */
166 #endif
167 
168         u32                     pnfs_blksize;   /* layout_blksize attr */
169 #if IS_ENABLED(CONFIG_NFS_V4)
170         u32                     attr_bitmask[3];/* V4 bitmask representing the set
171                                                    of attributes supported on this
172                                                    filesystem */
173         u32                     attr_bitmask_nl[3];
174                                                 /* V4 bitmask representing the
175                                                    set of attributes supported
176                                                    on this filesystem excluding
177                                                    the label support bit. */
178         u32                     exclcreat_bitmask[3];
179                                                 /* V4 bitmask representing the
180                                                    set of attributes supported
181                                                    on this filesystem for the
182                                                    exclusive create. */
183         u32                     cache_consistency_bitmask[3];
184                                                 /* V4 bitmask representing the subset
185                                                    of change attribute, size, ctime
186                                                    and mtime attributes supported by
187                                                    the server */
188         u32                     acl_bitmask;    /* V4 bitmask representing the ACEs
189                                                    that are supported on this
190                                                    filesystem */
191         u32                     fh_expire_type; /* V4 bitmask representing file
192                                                    handle volatility type for
193                                                    this filesystem */
194         struct pnfs_layoutdriver_type  *pnfs_curr_ld; /* Active layout driver */
195         struct rpc_wait_queue   roc_rpcwaitq;
196         void                    *pnfs_ld_data;  /* per mount point data */
197 
198         /* the following fields are protected by nfs_client->cl_lock */
199         struct rb_root          state_owners;
200 #endif
201         struct ida              openowner_id;
202         struct ida              lockowner_id;
203         struct list_head        state_owners_lru;
204         struct list_head        layouts;
205         struct list_head        delegations;
206 
207         unsigned long           mig_gen;
208         unsigned long           mig_status;
209 #define NFS_MIG_IN_TRANSITION           (1)
210 #define NFS_MIG_FAILED                  (2)
211 
212         void (*destroy)(struct nfs_server *);
213 
214         atomic_t active; /* Keep trace of any activity to this server */
215 
216         /* mountd-related mount options */
217         struct sockaddr_storage mountd_address;
218         size_t                  mountd_addrlen;
219         u32                     mountd_version;
220         unsigned short          mountd_port;
221         unsigned short          mountd_protocol;
222 };
223 
224 /* Server capabilities */
225 #define NFS_CAP_READDIRPLUS     (1U << 0)
226 #define NFS_CAP_HARDLINKS       (1U << 1)
227 #define NFS_CAP_SYMLINKS        (1U << 2)
228 #define NFS_CAP_ACLS            (1U << 3)
229 #define NFS_CAP_ATOMIC_OPEN     (1U << 4)
230 /* #define NFS_CAP_CHANGE_ATTR  (1U << 5) */
231 #define NFS_CAP_FILEID          (1U << 6)
232 #define NFS_CAP_MODE            (1U << 7)
233 #define NFS_CAP_NLINK           (1U << 8)
234 #define NFS_CAP_OWNER           (1U << 9)
235 #define NFS_CAP_OWNER_GROUP     (1U << 10)
236 #define NFS_CAP_ATIME           (1U << 11)
237 #define NFS_CAP_CTIME           (1U << 12)
238 #define NFS_CAP_MTIME           (1U << 13)
239 #define NFS_CAP_POSIX_LOCK      (1U << 14)
240 #define NFS_CAP_UIDGID_NOMAP    (1U << 15)
241 #define NFS_CAP_STATEID_NFSV41  (1U << 16)
242 #define NFS_CAP_ATOMIC_OPEN_V1  (1U << 17)
243 #define NFS_CAP_SECURITY_LABEL  (1U << 18)
244 #define NFS_CAP_SEEK            (1U << 19)
245 #define NFS_CAP_ALLOCATE        (1U << 20)
246 #define NFS_CAP_DEALLOCATE      (1U << 21)
247 #define NFS_CAP_LAYOUTSTATS     (1U << 22)
248 #define NFS_CAP_CLONE           (1U << 23)
249 
250 #endif
251 

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