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 #include <linux/nfslocalio.h> 12 13 #include <linux/atomic.h> 14 #include <linux/refcount.h> 15 16 struct nfs4_session; 17 struct nfs_iostats; 18 struct nlm_host; 19 struct nfs4_sequence_args; 20 struct nfs4_sequence_res; 21 struct nfs_server; 22 struct nfs4_minor_version_ops; 23 struct nfs41_server_scope; 24 struct nfs41_impl_id; 25 26 /* 27 * The nfs_client identifies our client state to the server. 28 */ 29 struct nfs_client { 30 refcount_t cl_count; 31 atomic_t cl_mds_count; 32 int cl_cons_state; /* current construction state (-ve: init error) */ 33 #define NFS_CS_READY 0 /* ready to be used */ 34 #define NFS_CS_INITING 1 /* busy initialising */ 35 #define NFS_CS_SESSION_INITING 2 /* busy initialising session */ 36 unsigned long cl_res_state; /* NFS resources state */ 37 #define NFS_CS_CALLBACK 1 /* - callback started */ 38 #define NFS_CS_IDMAP 2 /* - idmap started */ 39 #define NFS_CS_RENEWD 3 /* - renewd started */ 40 #define NFS_CS_STOP_RENEW 4 /* no more state to renew */ 41 #define NFS_CS_CHECK_LEASE_TIME 5 /* need to check lease time */ 42 unsigned long cl_flags; /* behavior switches */ 43 #define NFS_CS_NORESVPORT 0 /* - use ephemeral src port */ 44 #define NFS_CS_DISCRTRY 1 /* - disconnect on RPC retry */ 45 #define NFS_CS_MIGRATION 2 /* - transparent state migr */ 46 #define NFS_CS_INFINITE_SLOTS 3 /* - don't limit TCP slots */ 47 #define NFS_CS_NO_RETRANS_TIMEOUT 4 /* - Disable retransmit timeouts */ 48 #define NFS_CS_TSM_POSSIBLE 5 /* - Maybe state migration */ 49 #define NFS_CS_NOPING 6 /* - don't ping on connect */ 50 #define NFS_CS_DS 7 /* - Server is a DS */ 51 #define NFS_CS_REUSEPORT 8 /* - reuse src port on reconnect */ 52 #define NFS_CS_PNFS 9 /* - Server used for pnfs */ 53 #define NFS_CS_LOCAL_IO 10 /* - client is local */ 54 struct sockaddr_storage cl_addr; /* server identifier */ 55 size_t cl_addrlen; 56 char * cl_hostname; /* hostname of server */ 57 char * cl_acceptor; /* GSSAPI acceptor name */ 58 struct list_head cl_share_link; /* link in global client list */ 59 struct list_head cl_superblocks; /* List of nfs_server structs */ 60 61 struct rpc_clnt * cl_rpcclient; 62 const struct nfs_rpc_ops *rpc_ops; /* NFS protocol vector */ 63 int cl_proto; /* Network transport protocol */ 64 struct nfs_subversion * cl_nfs_mod; /* pointer to nfs version module */ 65 66 u32 cl_minorversion;/* NFSv4 minorversion */ 67 unsigned int cl_nconnect; /* Number of connections */ 68 unsigned int cl_max_connect; /* max number of xprts allowed */ 69 const char * cl_principal; /* used for machine cred */ 70 struct xprtsec_parms cl_xprtsec; /* xprt security policy */ 71 72 #if IS_ENABLED(CONFIG_NFS_V4) 73 struct list_head cl_ds_clients; /* auth flavor data servers */ 74 u64 cl_clientid; /* constant */ 75 nfs4_verifier cl_confirm; /* Clientid verifier */ 76 unsigned long cl_state; 77 78 spinlock_t cl_lock; 79 80 unsigned long cl_lease_time; 81 unsigned long cl_last_renewal; 82 struct delayed_work cl_renewd; 83 84 struct rpc_wait_queue cl_rpcwaitq; 85 86 /* idmapper */ 87 struct idmap * cl_idmap; 88 89 /* Client owner identifier */ 90 const char * cl_owner_id; 91 92 u32 cl_cb_ident; /* v4.0 callback identifier */ 93 const struct nfs4_minor_version_ops *cl_mvops; 94 unsigned long cl_mig_gen; 95 96 /* NFSv4.0 transport blocking */ 97 struct nfs4_slot_table *cl_slot_tbl; 98 99 /* The sequence id to use for the next CREATE_SESSION */ 100 u32 cl_seqid; 101 /* The flags used for obtaining the clientid during EXCHANGE_ID */ 102 u32 cl_exchange_flags; 103 struct nfs4_session *cl_session; /* shared session */ 104 bool cl_preserve_clid; 105 struct nfs41_server_owner *cl_serverowner; 106 struct nfs41_server_scope *cl_serverscope; 107 struct nfs41_impl_id *cl_implid; 108 /* nfs 4.1+ state protection modes: */ 109 unsigned long cl_sp4_flags; 110 #define NFS_SP4_MACH_CRED_MINIMAL 1 /* Minimal sp4_mach_cred - state ops 111 * must use machine cred */ 112 #define NFS_SP4_MACH_CRED_CLEANUP 2 /* CLOSE and LOCKU */ 113 #define NFS_SP4_MACH_CRED_SECINFO 3 /* SECINFO and SECINFO_NO_NAME */ 114 #define NFS_SP4_MACH_CRED_STATEID 4 /* TEST_STATEID and FREE_STATEID */ 115 #define NFS_SP4_MACH_CRED_WRITE 5 /* WRITE */ 116 #define NFS_SP4_MACH_CRED_COMMIT 6 /* COMMIT */ 117 #define NFS_SP4_MACH_CRED_PNFS_CLEANUP 7 /* LAYOUTRETURN */ 118 #if IS_ENABLED(CONFIG_NFS_V4_1) 119 wait_queue_head_t cl_lock_waitq; 120 #endif /* CONFIG_NFS_V4_1 */ 121 #endif /* CONFIG_NFS_V4 */ 122 123 /* Our own IP address, as a null-terminated string. 124 * This is used to generate the mv0 callback address. 125 */ 126 char cl_ipaddr[48]; 127 struct net *cl_net; 128 struct list_head pending_cb_stateids; 129 struct rcu_head rcu; 130 131 #if IS_ENABLED(CONFIG_NFS_LOCALIO) 132 struct timespec64 cl_nfssvc_boot; 133 seqlock_t cl_boot_lock; 134 nfs_uuid_t cl_uuid; 135 spinlock_t cl_localio_lock; 136 #endif /* CONFIG_NFS_LOCALIO */ 137 }; 138 139 /* 140 * NFS client parameters stored in the superblock. 141 */ 142 struct nfs_server { 143 struct nfs_client * nfs_client; /* shared client and NFS4 state */ 144 struct list_head client_link; /* List of other nfs_server structs 145 * that share the same client 146 */ 147 struct list_head master_link; /* link in master servers list */ 148 struct rpc_clnt * client; /* RPC client handle */ 149 struct rpc_clnt * client_acl; /* ACL RPC client handle */ 150 struct nlm_host *nlm_host; /* NLM client handle */ 151 struct nfs_iostats __percpu *io_stats; /* I/O statistics */ 152 wait_queue_head_t write_congestion_wait; /* wait until write congestion eases */ 153 atomic_long_t writeback; /* number of writeback pages */ 154 unsigned int write_congested;/* flag set when writeback gets too high */ 155 unsigned int flags; /* various flags */ 156 157 /* The following are for internal use only. Also see uapi/linux/nfs_mount.h */ 158 #define NFS_MOUNT_LOOKUP_CACHE_NONEG 0x10000 159 #define NFS_MOUNT_LOOKUP_CACHE_NONE 0x20000 160 #define NFS_MOUNT_NORESVPORT 0x40000 161 #define NFS_MOUNT_LEGACY_INTERFACE 0x80000 162 #define NFS_MOUNT_LOCAL_FLOCK 0x100000 163 #define NFS_MOUNT_LOCAL_FCNTL 0x200000 164 #define NFS_MOUNT_SOFTERR 0x400000 165 #define NFS_MOUNT_SOFTREVAL 0x800000 166 #define NFS_MOUNT_WRITE_EAGER 0x01000000 167 #define NFS_MOUNT_WRITE_WAIT 0x02000000 168 #define NFS_MOUNT_TRUNK_DISCOVERY 0x04000000 169 #define NFS_MOUNT_SHUTDOWN 0x08000000 170 #define NFS_MOUNT_NO_ALIGNWRITE 0x10000000 171 172 unsigned int fattr_valid; /* Valid attributes */ 173 unsigned int caps; /* server capabilities */ 174 unsigned int rsize; /* read size */ 175 unsigned int rpages; /* read size (in pages) */ 176 unsigned int wsize; /* write size */ 177 unsigned int wpages; /* write size (in pages) */ 178 unsigned int wtmult; /* server disk block size */ 179 unsigned int dtsize; /* readdir size */ 180 unsigned short port; /* "port=" setting */ 181 unsigned int bsize; /* server block size */ 182 #ifdef CONFIG_NFS_V4_2 183 unsigned int gxasize; /* getxattr size */ 184 unsigned int sxasize; /* setxattr size */ 185 unsigned int lxasize; /* listxattr size */ 186 #endif 187 unsigned int acregmin; /* attr cache timeouts */ 188 unsigned int acregmax; 189 unsigned int acdirmin; 190 unsigned int acdirmax; 191 unsigned int namelen; 192 unsigned int options; /* extra options enabled by mount */ 193 unsigned int clone_blksize; /* granularity of a CLONE operation */ 194 #define NFS_OPTION_FSCACHE 0x00000001 /* - local caching enabled */ 195 #define NFS_OPTION_MIGRATION 0x00000002 /* - NFSv4 migration enabled */ 196 197 enum nfs4_change_attr_type 198 change_attr_type;/* Description of change attribute */ 199 200 struct nfs_fsid fsid; 201 int s_sysfs_id; /* sysfs dentry index */ 202 __u64 maxfilesize; /* maximum file size */ 203 struct timespec64 time_delta; /* smallest time granularity */ 204 unsigned long mount_time; /* when this fs was mounted */ 205 struct super_block *super; /* VFS super block */ 206 dev_t s_dev; /* superblock dev numbers */ 207 struct nfs_auth_info auth_info; /* parsed auth flavors */ 208 209 #ifdef CONFIG_NFS_FSCACHE 210 struct fscache_volume *fscache; /* superblock cookie */ 211 char *fscache_uniq; /* Uniquifier (or NULL) */ 212 #endif 213 214 u32 pnfs_blksize; /* layout_blksize attr */ 215 #if IS_ENABLED(CONFIG_NFS_V4) 216 u32 attr_bitmask[3];/* V4 bitmask representing the set 217 of attributes supported on this 218 filesystem */ 219 u32 attr_bitmask_nl[3]; 220 /* V4 bitmask representing the 221 set of attributes supported 222 on this filesystem excluding 223 the label support bit. */ 224 u32 exclcreat_bitmask[3]; 225 /* V4 bitmask representing the 226 set of attributes supported 227 on this filesystem for the 228 exclusive create. */ 229 u32 cache_consistency_bitmask[3]; 230 /* V4 bitmask representing the subset 231 of change attribute, size, ctime 232 and mtime attributes supported by 233 the server */ 234 u32 acl_bitmask; /* V4 bitmask representing the ACEs 235 that are supported on this 236 filesystem */ 237 u32 fh_expire_type; /* V4 bitmask representing file 238 handle volatility type for 239 this filesystem */ 240 struct pnfs_layoutdriver_type *pnfs_curr_ld; /* Active layout driver */ 241 struct rpc_wait_queue roc_rpcwaitq; 242 void *pnfs_ld_data; /* per mount point data */ 243 244 /* the following fields are protected by nfs_client->cl_lock */ 245 struct rb_root state_owners; 246 #endif 247 atomic64_t owner_ctr; 248 struct list_head state_owners_lru; 249 struct list_head layouts; 250 struct list_head delegations; 251 struct list_head ss_copies; 252 struct list_head ss_src_copies; 253 254 unsigned long delegation_gen; 255 unsigned long mig_gen; 256 unsigned long mig_status; 257 #define NFS_MIG_IN_TRANSITION (1) 258 #define NFS_MIG_FAILED (2) 259 #define NFS_MIG_TSM_POSSIBLE (3) 260 261 void (*destroy)(struct nfs_server *); 262 263 atomic_t active; /* Keep trace of any activity to this server */ 264 265 /* mountd-related mount options */ 266 struct sockaddr_storage mountd_address; 267 size_t mountd_addrlen; 268 u32 mountd_version; 269 unsigned short mountd_port; 270 unsigned short mountd_protocol; 271 struct rpc_wait_queue uoc_rpcwaitq; 272 273 /* XDR related information */ 274 unsigned int read_hdrsize; 275 276 /* User namespace info */ 277 const struct cred *cred; 278 bool has_sec_mnt_opts; 279 struct kobject kobj; 280 struct rcu_head rcu; 281 }; 282 283 /* Server capabilities */ 284 #define NFS_CAP_READDIRPLUS (1U << 0) 285 #define NFS_CAP_HARDLINKS (1U << 1) 286 #define NFS_CAP_SYMLINKS (1U << 2) 287 #define NFS_CAP_ACLS (1U << 3) 288 #define NFS_CAP_ATOMIC_OPEN (1U << 4) 289 #define NFS_CAP_LGOPEN (1U << 5) 290 #define NFS_CAP_CASE_INSENSITIVE (1U << 6) 291 #define NFS_CAP_CASE_PRESERVING (1U << 7) 292 #define NFS_CAP_REBOOT_LAYOUTRETURN (1U << 8) 293 #define NFS_CAP_OPEN_XOR (1U << 12) 294 #define NFS_CAP_DELEGTIME (1U << 13) 295 #define NFS_CAP_POSIX_LOCK (1U << 14) 296 #define NFS_CAP_UIDGID_NOMAP (1U << 15) 297 #define NFS_CAP_STATEID_NFSV41 (1U << 16) 298 #define NFS_CAP_ATOMIC_OPEN_V1 (1U << 17) 299 #define NFS_CAP_SECURITY_LABEL (1U << 18) 300 #define NFS_CAP_SEEK (1U << 19) 301 #define NFS_CAP_ALLOCATE (1U << 20) 302 #define NFS_CAP_DEALLOCATE (1U << 21) 303 #define NFS_CAP_LAYOUTSTATS (1U << 22) 304 #define NFS_CAP_CLONE (1U << 23) 305 #define NFS_CAP_COPY (1U << 24) 306 #define NFS_CAP_OFFLOAD_CANCEL (1U << 25) 307 #define NFS_CAP_LAYOUTERROR (1U << 26) 308 #define NFS_CAP_COPY_NOTIFY (1U << 27) 309 #define NFS_CAP_XATTR (1U << 28) 310 #define NFS_CAP_READ_PLUS (1U << 29) 311 #define NFS_CAP_FS_LOCATIONS (1U << 30) 312 #define NFS_CAP_MOVEABLE (1U << 31) 313 #endif 314