1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _NFS_FS_SB 3 #define _NFS_FS_SB 4 5 #include <linux/list.h> 6 #include <linux/backing-dev.h> 7 #include <linux/idr.h> 8 #include <linux/wait.h> 9 #include <linux/nfs_xdr.h> 10 #include <linux/sunrpc/xprt.h> 11 12 #include <linux/atomic.h> 13 #include <linux/refcount.h> 14 15 struct nfs4_session; 16 struct nfs_iostats; 17 struct nlm_host; 18 struct nfs4_sequence_args; 19 struct nfs4_sequence_res; 20 struct nfs_server; 21 struct nfs4_minor_version_ops; 22 struct nfs41_server_scope; 23 struct nfs41_impl_id; 24 25 /* 26 * The nfs_client identifies our client state to the server. 27 */ 28 struct nfs_client { 29 refcount_t cl_count; 30 atomic_t cl_mds_count; 31 int cl_cons_state; /* current construction state (-ve: init error) */ 32 #define NFS_CS_READY 0 /* ready to be used */ 33 #define NFS_CS_INITING 1 /* busy initialising */ 34 #define NFS_CS_SESSION_INITING 2 /* busy initialising session */ 35 unsigned long cl_res_state; /* NFS resources state */ 36 #define NFS_CS_CALLBACK 1 /* - callback started */ 37 #define NFS_CS_IDMAP 2 /* - idmap started */ 38 #define NFS_CS_RENEWD 3 /* - renewd started */ 39 #define NFS_CS_STOP_RENEW 4 /* no more state to renew */ 40 #define NFS_CS_CHECK_LEASE_TIME 5 /* need to check lease time */ 41 unsigned long cl_flags; /* behavior switches */ 42 #define NFS_CS_NORESVPORT 0 /* - use ephemeral src port */ 43 #define NFS_CS_DISCRTRY 1 /* - disconnect on RPC retry */ 44 #define NFS_CS_MIGRATION 2 /* - transparent state migr */ 45 #define NFS_CS_INFINITE_SLOTS 3 /* - don't limit TCP slots */ 46 #define NFS_CS_NO_RETRANS_TIMEOUT 4 /* - Disable retransmit timeouts */ 47 #define NFS_CS_TSM_POSSIBLE 5 /* - Maybe state migration */ 48 struct sockaddr_storage cl_addr; /* server identifier */ 49 size_t cl_addrlen; 50 char * cl_hostname; /* hostname of server */ 51 char * cl_acceptor; /* GSSAPI acceptor name */ 52 struct list_head cl_share_link; /* link in global client list */ 53 struct list_head cl_superblocks; /* List of nfs_server structs */ 54 55 struct rpc_clnt * cl_rpcclient; 56 const struct nfs_rpc_ops *rpc_ops; /* NFS protocol vector */ 57 int cl_proto; /* Network transport protocol */ 58 struct nfs_subversion * cl_nfs_mod; /* pointer to nfs version module */ 59 60 u32 cl_minorversion;/* NFSv4 minorversion */ 61 unsigned int cl_nconnect; /* Number of connections */ 62 const char * cl_principal; /* used for machine cred */ 63 64 #if IS_ENABLED(CONFIG_NFS_V4) 65 struct list_head cl_ds_clients; /* auth flavor data servers */ 66 u64 cl_clientid; /* constant */ 67 nfs4_verifier cl_confirm; /* Clientid verifier */ 68 unsigned long cl_state; 69 70 spinlock_t cl_lock; 71 72 unsigned long cl_lease_time; 73 unsigned long cl_last_renewal; 74 struct delayed_work cl_renewd; 75 76 struct rpc_wait_queue cl_rpcwaitq; 77 78 /* idmapper */ 79 struct idmap * cl_idmap; 80 81 /* Client owner identifier */ 82 const char * cl_owner_id; 83 84 u32 cl_cb_ident; /* v4.0 callback identifier */ 85 const struct nfs4_minor_version_ops *cl_mvops; 86 unsigned long cl_mig_gen; 87 88 /* NFSv4.0 transport blocking */ 89 struct nfs4_slot_table *cl_slot_tbl; 90 91 /* The sequence id to use for the next CREATE_SESSION */ 92 u32 cl_seqid; 93 /* The flags used for obtaining the clientid during EXCHANGE_ID */ 94 u32 cl_exchange_flags; 95 struct nfs4_session *cl_session; /* shared session */ 96 bool cl_preserve_clid; 97 struct nfs41_server_owner *cl_serverowner; 98 struct nfs41_server_scope *cl_serverscope; 99 struct nfs41_impl_id *cl_implid; 100 /* nfs 4.1+ state protection modes: */ 101 unsigned long cl_sp4_flags; 102 #define NFS_SP4_MACH_CRED_MINIMAL 1 /* Minimal sp4_mach_cred - state ops 103 * must use machine cred */ 104 #define NFS_SP4_MACH_CRED_CLEANUP 2 /* CLOSE and LOCKU */ 105 #define NFS_SP4_MACH_CRED_SECINFO 3 /* SECINFO and SECINFO_NO_NAME */ 106 #define NFS_SP4_MACH_CRED_STATEID 4 /* TEST_STATEID and FREE_STATEID */ 107 #define NFS_SP4_MACH_CRED_WRITE 5 /* WRITE */ 108 #define NFS_SP4_MACH_CRED_COMMIT 6 /* COMMIT */ 109 #define NFS_SP4_MACH_CRED_PNFS_CLEANUP 7 /* LAYOUTRETURN */ 110 #if IS_ENABLED(CONFIG_NFS_V4_1) 111 wait_queue_head_t cl_lock_waitq; 112 #endif /* CONFIG_NFS_V4_1 */ 113 #endif /* CONFIG_NFS_V4 */ 114 115 /* Our own IP address, as a null-terminated string. 116 * This is used to generate the mv0 callback address. 117 */ 118 char cl_ipaddr[48]; 119 120 #ifdef CONFIG_NFS_FSCACHE 121 struct fscache_cookie *fscache; /* client index cache cookie */ 122 #endif 123 124 struct net *cl_net; 125 struct list_head pending_cb_stateids; 126 }; 127 128 /* 129 * NFS client parameters stored in the superblock. 130 */ 131 struct nfs_server { 132 struct nfs_client * nfs_client; /* shared client and NFS4 state */ 133 struct list_head client_link; /* List of other nfs_server structs 134 * that share the same client 135 */ 136 struct list_head master_link; /* link in master servers list */ 137 struct rpc_clnt * client; /* RPC client handle */ 138 struct rpc_clnt * client_acl; /* ACL RPC client handle */ 139 struct nlm_host *nlm_host; /* NLM client handle */ 140 struct nfs_iostats __percpu *io_stats; /* I/O statistics */ 141 atomic_long_t writeback; /* number of writeback pages */ 142 int flags; /* various flags */ 143 144 /* The following are for internal use only. Also see uapi/linux/nfs_mount.h */ 145 #define NFS_MOUNT_LOOKUP_CACHE_NONEG 0x10000 146 #define NFS_MOUNT_LOOKUP_CACHE_NONE 0x20000 147 #define NFS_MOUNT_NORESVPORT 0x40000 148 #define NFS_MOUNT_LEGACY_INTERFACE 0x80000 149 #define NFS_MOUNT_LOCAL_FLOCK 0x100000 150 #define NFS_MOUNT_LOCAL_FCNTL 0x200000 151 #define NFS_MOUNT_SOFTERR 0x400000 152 153 unsigned int caps; /* server capabilities */ 154 unsigned int rsize; /* read size */ 155 unsigned int rpages; /* read size (in pages) */ 156 unsigned int wsize; /* write size */ 157 unsigned int wpages; /* write size (in pages) */ 158 unsigned int wtmult; /* server disk block size */ 159 unsigned int dtsize; /* readdir size */ 160 unsigned short port; /* "port=" setting */ 161 unsigned int bsize; /* server block size */ 162 unsigned int acregmin; /* attr cache timeouts */ 163 unsigned int acregmax; 164 unsigned int acdirmin; 165 unsigned int acdirmax; 166 unsigned int namelen; 167 unsigned int options; /* extra options enabled by mount */ 168 unsigned int clone_blksize; /* granularity of a CLONE operation */ 169 #define NFS_OPTION_FSCACHE 0x00000001 /* - local caching enabled */ 170 #define NFS_OPTION_MIGRATION 0x00000002 /* - NFSv4 migration enabled */ 171 172 struct nfs_fsid fsid; 173 __u64 maxfilesize; /* maximum file size */ 174 struct timespec time_delta; /* smallest time granularity */ 175 unsigned long mount_time; /* when this fs was mounted */ 176 struct super_block *super; /* VFS super block */ 177 dev_t s_dev; /* superblock dev numbers */ 178 struct nfs_auth_info auth_info; /* parsed auth flavors */ 179 180 #ifdef CONFIG_NFS_FSCACHE 181 struct nfs_fscache_key *fscache_key; /* unique key for superblock */ 182 struct fscache_cookie *fscache; /* superblock cookie */ 183 #endif 184 185 u32 pnfs_blksize; /* layout_blksize attr */ 186 #if IS_ENABLED(CONFIG_NFS_V4) 187 u32 attr_bitmask[3];/* V4 bitmask representing the set 188 of attributes supported on this 189 filesystem */ 190 u32 attr_bitmask_nl[3]; 191 /* V4 bitmask representing the 192 set of attributes supported 193 on this filesystem excluding 194 the label support bit. */ 195 u32 exclcreat_bitmask[3]; 196 /* V4 bitmask representing the 197 set of attributes supported 198 on this filesystem for the 199 exclusive create. */ 200 u32 cache_consistency_bitmask[3]; 201 /* V4 bitmask representing the subset 202 of change attribute, size, ctime 203 and mtime attributes supported by 204 the server */ 205 u32 acl_bitmask; /* V4 bitmask representing the ACEs 206 that are supported on this 207 filesystem */ 208 u32 fh_expire_type; /* V4 bitmask representing file 209 handle volatility type for 210 this filesystem */ 211 struct pnfs_layoutdriver_type *pnfs_curr_ld; /* Active layout driver */ 212 struct rpc_wait_queue roc_rpcwaitq; 213 void *pnfs_ld_data; /* per mount point data */ 214 215 /* the following fields are protected by nfs_client->cl_lock */ 216 struct rb_root state_owners; 217 #endif 218 struct ida openowner_id; 219 struct ida lockowner_id; 220 struct list_head state_owners_lru; 221 struct list_head layouts; 222 struct list_head delegations; 223 struct list_head ss_copies; 224 225 unsigned long mig_gen; 226 unsigned long mig_status; 227 #define NFS_MIG_IN_TRANSITION (1) 228 #define NFS_MIG_FAILED (2) 229 #define NFS_MIG_TSM_POSSIBLE (3) 230 231 void (*destroy)(struct nfs_server *); 232 233 atomic_t active; /* Keep trace of any activity to this server */ 234 235 /* mountd-related mount options */ 236 struct sockaddr_storage mountd_address; 237 size_t mountd_addrlen; 238 u32 mountd_version; 239 unsigned short mountd_port; 240 unsigned short mountd_protocol; 241 struct rpc_wait_queue uoc_rpcwaitq; 242 243 /* XDR related information */ 244 unsigned int read_hdrsize; 245 246 /* User namespace info */ 247 const struct cred *cred; 248 }; 249 250 /* Server capabilities */ 251 #define NFS_CAP_READDIRPLUS (1U << 0) 252 #define NFS_CAP_HARDLINKS (1U << 1) 253 #define NFS_CAP_SYMLINKS (1U << 2) 254 #define NFS_CAP_ACLS (1U << 3) 255 #define NFS_CAP_ATOMIC_OPEN (1U << 4) 256 /* #define NFS_CAP_CHANGE_ATTR (1U << 5) */ 257 #define NFS_CAP_LGOPEN (1U << 5) 258 #define NFS_CAP_FILEID (1U << 6) 259 #define NFS_CAP_MODE (1U << 7) 260 #define NFS_CAP_NLINK (1U << 8) 261 #define NFS_CAP_OWNER (1U << 9) 262 #define NFS_CAP_OWNER_GROUP (1U << 10) 263 #define NFS_CAP_ATIME (1U << 11) 264 #define NFS_CAP_CTIME (1U << 12) 265 #define NFS_CAP_MTIME (1U << 13) 266 #define NFS_CAP_POSIX_LOCK (1U << 14) 267 #define NFS_CAP_UIDGID_NOMAP (1U << 15) 268 #define NFS_CAP_STATEID_NFSV41 (1U << 16) 269 #define NFS_CAP_ATOMIC_OPEN_V1 (1U << 17) 270 #define NFS_CAP_SECURITY_LABEL (1U << 18) 271 #define NFS_CAP_SEEK (1U << 19) 272 #define NFS_CAP_ALLOCATE (1U << 20) 273 #define NFS_CAP_DEALLOCATE (1U << 21) 274 #define NFS_CAP_LAYOUTSTATS (1U << 22) 275 #define NFS_CAP_CLONE (1U << 23) 276 #define NFS_CAP_COPY (1U << 24) 277 #define NFS_CAP_OFFLOAD_CANCEL (1U << 25) 278 #define NFS_CAP_LAYOUTERROR (1U << 26) 279 280 #endif 281