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 #define NFS_CS_NOPING 6 /* - don't ping on connect */ 49 #define NFS_CS_DS 7 /* - Server is a DS */ 50 #define NFS_CS_REUSEPORT 8 /* - reuse src port on reconnect */ 51 struct sockaddr_storage cl_addr; /* server identifier */ 52 size_t cl_addrlen; 53 char * cl_hostname; /* hostname of server */ 54 char * cl_acceptor; /* GSSAPI acceptor name */ 55 struct list_head cl_share_link; /* link in global client list */ 56 struct list_head cl_superblocks; /* List of nfs_server structs */ 57 58 struct rpc_clnt * cl_rpcclient; 59 const struct nfs_rpc_ops *rpc_ops; /* NFS protocol vector */ 60 int cl_proto; /* Network transport protocol */ 61 struct nfs_subversion * cl_nfs_mod; /* pointer to nfs version module */ 62 63 u32 cl_minorversion;/* NFSv4 minorversion */ 64 unsigned int cl_nconnect; /* Number of connections */ 65 unsigned int cl_max_connect; /* max number of xprts allowed */ 66 const char * cl_principal; /* used for machine cred */ 67 struct xprtsec_parms cl_xprtsec; /* xprt security policy */ 68 69 #if IS_ENABLED(CONFIG_NFS_V4) 70 struct list_head cl_ds_clients; /* auth flavor data servers */ 71 u64 cl_clientid; /* constant */ 72 nfs4_verifier cl_confirm; /* Clientid verifier */ 73 unsigned long cl_state; 74 75 spinlock_t cl_lock; 76 77 unsigned long cl_lease_time; 78 unsigned long cl_last_renewal; 79 struct delayed_work cl_renewd; 80 81 struct rpc_wait_queue cl_rpcwaitq; 82 83 /* idmapper */ 84 struct idmap * cl_idmap; 85 86 /* Client owner identifier */ 87 const char * cl_owner_id; 88 89 u32 cl_cb_ident; /* v4.0 callback identifier */ 90 const struct nfs4_minor_version_ops *cl_mvops; 91 unsigned long cl_mig_gen; 92 93 /* NFSv4.0 transport blocking */ 94 struct nfs4_slot_table *cl_slot_tbl; 95 96 /* The sequence id to use for the next CREATE_SESSION */ 97 u32 cl_seqid; 98 /* The flags used for obtaining the clientid during EXCHANGE_ID */ 99 u32 cl_exchange_flags; 100 struct nfs4_session *cl_session; /* shared session */ 101 bool cl_preserve_clid; 102 struct nfs41_server_owner *cl_serverowner; 103 struct nfs41_server_scope *cl_serverscope; 104 struct nfs41_impl_id *cl_implid; 105 /* nfs 4.1+ state protection modes: */ 106 unsigned long cl_sp4_flags; 107 #define NFS_SP4_MACH_CRED_MINIMAL 1 /* Minimal sp4_mach_cred - state ops 108 * must use machine cred */ 109 #define NFS_SP4_MACH_CRED_CLEANUP 2 /* CLOSE and LOCKU */ 110 #define NFS_SP4_MACH_CRED_SECINFO 3 /* SECINFO and SECINFO_NO_NAME */ 111 #define NFS_SP4_MACH_CRED_STATEID 4 /* TEST_STATEID and FREE_STATEID */ 112 #define NFS_SP4_MACH_CRED_WRITE 5 /* WRITE */ 113 #define NFS_SP4_MACH_CRED_COMMIT 6 /* COMMIT */ 114 #define NFS_SP4_MACH_CRED_PNFS_CLEANUP 7 /* LAYOUTRETURN */ 115 #if IS_ENABLED(CONFIG_NFS_V4_1) 116 wait_queue_head_t cl_lock_waitq; 117 #endif /* CONFIG_NFS_V4_1 */ 118 #endif /* CONFIG_NFS_V4 */ 119 120 /* Our own IP address, as a null-terminated string. 121 * This is used to generate the mv0 callback address. 122 */ 123 char cl_ipaddr[48]; 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 unsigned int write_congested;/* flag set when writeback gets too high */ 143 unsigned int flags; /* various flags */ 144 145 /* The following are for internal use only. Also see uapi/linux/nfs_mount.h */ 146 #define NFS_MOUNT_LOOKUP_CACHE_NONEG 0x10000 147 #define NFS_MOUNT_LOOKUP_CACHE_NONE 0x20000 148 #define NFS_MOUNT_NORESVPORT 0x40000 149 #define NFS_MOUNT_LEGACY_INTERFACE 0x80000 150 #define NFS_MOUNT_LOCAL_FLOCK 0x100000 151 #define NFS_MOUNT_LOCAL_FCNTL 0x200000 152 #define NFS_MOUNT_SOFTERR 0x400000 153 #define NFS_MOUNT_SOFTREVAL 0x800000 154 #define NFS_MOUNT_WRITE_EAGER 0x01000000 155 #define NFS_MOUNT_WRITE_WAIT 0x02000000 156 #define NFS_MOUNT_TRUNK_DISCOVERY 0x04000000 157 #define NFS_MOUNT_SHUTDOWN 0x08000000 158 159 unsigned int fattr_valid; /* Valid attributes */ 160 unsigned int caps; /* server capabilities */ 161 unsigned int rsize; /* read size */ 162 unsigned int rpages; /* read size (in pages) */ 163 unsigned int wsize; /* write size */ 164 unsigned int wpages; /* write size (in pages) */ 165 unsigned int wtmult; /* server disk block size */ 166 unsigned int dtsize; /* readdir size */ 167 unsigned short port; /* "port=" setting */ 168 unsigned int bsize; /* server block size */ 169 #ifdef CONFIG_NFS_V4_2 170 unsigned int gxasize; /* getxattr size */ 171 unsigned int sxasize; /* setxattr size */ 172 unsigned int lxasize; /* listxattr size */ 173 #endif 174 unsigned int acregmin; /* attr cache timeouts */ 175 unsigned int acregmax; 176 unsigned int acdirmin; 177 unsigned int acdirmax; 178 unsigned int namelen; 179 unsigned int options; /* extra options enabled by mount */ 180 unsigned int clone_blksize; /* granularity of a CLONE operation */ 181 #define NFS_OPTION_FSCACHE 0x00000001 /* - local caching enabled */ 182 #define NFS_OPTION_MIGRATION 0x00000002 /* - NFSv4 migration enabled */ 183 184 enum nfs4_change_attr_type 185 change_attr_type;/* Description of change attribute */ 186 187 struct nfs_fsid fsid; 188 int s_sysfs_id; /* sysfs dentry index */ 189 __u64 maxfilesize; /* maximum file size */ 190 struct timespec64 time_delta; /* smallest time granularity */ 191 unsigned long mount_time; /* when this fs was mounted */ 192 struct super_block *super; /* VFS super block */ 193 dev_t s_dev; /* superblock dev numbers */ 194 struct nfs_auth_info auth_info; /* parsed auth flavors */ 195 196 #ifdef CONFIG_NFS_FSCACHE 197 struct fscache_volume *fscache; /* superblock cookie */ 198 char *fscache_uniq; /* Uniquifier (or NULL) */ 199 #endif 200 201 u32 pnfs_blksize; /* layout_blksize attr */ 202 #if IS_ENABLED(CONFIG_NFS_V4) 203 u32 attr_bitmask[3];/* V4 bitmask representing the set 204 of attributes supported on this 205 filesystem */ 206 u32 attr_bitmask_nl[3]; 207 /* V4 bitmask representing the 208 set of attributes supported 209 on this filesystem excluding 210 the label support bit. */ 211 u32 exclcreat_bitmask[3]; 212 /* V4 bitmask representing the 213 set of attributes supported 214 on this filesystem for the 215 exclusive create. */ 216 u32 cache_consistency_bitmask[3]; 217 /* V4 bitmask representing the subset 218 of change attribute, size, ctime 219 and mtime attributes supported by 220 the server */ 221 u32 acl_bitmask; /* V4 bitmask representing the ACEs 222 that are supported on this 223 filesystem */ 224 u32 fh_expire_type; /* V4 bitmask representing file 225 handle volatility type for 226 this filesystem */ 227 struct pnfs_layoutdriver_type *pnfs_curr_ld; /* Active layout driver */ 228 struct rpc_wait_queue roc_rpcwaitq; 229 void *pnfs_ld_data; /* per mount point data */ 230 231 /* the following fields are protected by nfs_client->cl_lock */ 232 struct rb_root state_owners; 233 #endif 234 struct ida openowner_id; 235 struct ida lockowner_id; 236 struct list_head state_owners_lru; 237 struct list_head layouts; 238 struct list_head delegations; 239 struct list_head ss_copies; 240 241 unsigned long mig_gen; 242 unsigned long mig_status; 243 #define NFS_MIG_IN_TRANSITION (1) 244 #define NFS_MIG_FAILED (2) 245 #define NFS_MIG_TSM_POSSIBLE (3) 246 247 void (*destroy)(struct nfs_server *); 248 249 atomic_t active; /* Keep trace of any activity to this server */ 250 251 /* mountd-related mount options */ 252 struct sockaddr_storage mountd_address; 253 size_t mountd_addrlen; 254 u32 mountd_version; 255 unsigned short mountd_port; 256 unsigned short mountd_protocol; 257 struct rpc_wait_queue uoc_rpcwaitq; 258 259 /* XDR related information */ 260 unsigned int read_hdrsize; 261 262 /* User namespace info */ 263 const struct cred *cred; 264 bool has_sec_mnt_opts; 265 struct kobject kobj; 266 }; 267 268 /* Server capabilities */ 269 #define NFS_CAP_READDIRPLUS (1U << 0) 270 #define NFS_CAP_HARDLINKS (1U << 1) 271 #define NFS_CAP_SYMLINKS (1U << 2) 272 #define NFS_CAP_ACLS (1U << 3) 273 #define NFS_CAP_ATOMIC_OPEN (1U << 4) 274 #define NFS_CAP_LGOPEN (1U << 5) 275 #define NFS_CAP_CASE_INSENSITIVE (1U << 6) 276 #define NFS_CAP_CASE_PRESERVING (1U << 7) 277 #define NFS_CAP_POSIX_LOCK (1U << 14) 278 #define NFS_CAP_UIDGID_NOMAP (1U << 15) 279 #define NFS_CAP_STATEID_NFSV41 (1U << 16) 280 #define NFS_CAP_ATOMIC_OPEN_V1 (1U << 17) 281 #define NFS_CAP_SECURITY_LABEL (1U << 18) 282 #define NFS_CAP_SEEK (1U << 19) 283 #define NFS_CAP_ALLOCATE (1U << 20) 284 #define NFS_CAP_DEALLOCATE (1U << 21) 285 #define NFS_CAP_LAYOUTSTATS (1U << 22) 286 #define NFS_CAP_CLONE (1U << 23) 287 #define NFS_CAP_COPY (1U << 24) 288 #define NFS_CAP_OFFLOAD_CANCEL (1U << 25) 289 #define NFS_CAP_LAYOUTERROR (1U << 26) 290 #define NFS_CAP_COPY_NOTIFY (1U << 27) 291 #define NFS_CAP_XATTR (1U << 28) 292 #define NFS_CAP_READ_PLUS (1U << 29) 293 #define NFS_CAP_FS_LOCATIONS (1U << 30) 294 #define NFS_CAP_MOVEABLE (1U << 31) 295 #endif 296