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 struct list_head cl_share_link; /* link in global client list */ 49 struct list_head cl_superblocks; /* List of nfs_server structs */ 50 51 struct rpc_clnt * cl_rpcclient; 52 const struct nfs_rpc_ops *rpc_ops; /* NFS protocol vector */ 53 int cl_proto; /* Network transport protocol */ 54 struct nfs_subversion * cl_nfs_mod; /* pointer to nfs version module */ 55 56 u32 cl_minorversion;/* NFSv4 minorversion */ 57 struct rpc_cred *cl_machine_cred; 58 59 #if IS_ENABLED(CONFIG_NFS_V4) 60 struct list_head cl_ds_clients; /* auth flavor data servers */ 61 u64 cl_clientid; /* constant */ 62 nfs4_verifier cl_confirm; /* Clientid verifier */ 63 unsigned long cl_state; 64 65 spinlock_t cl_lock; 66 67 unsigned long cl_lease_time; 68 unsigned long cl_last_renewal; 69 struct delayed_work cl_renewd; 70 71 struct rpc_wait_queue cl_rpcwaitq; 72 73 /* idmapper */ 74 struct idmap * cl_idmap; 75 76 /* Our own IP address, as a null-terminated string. 77 * This is used to generate the mv0 callback address. 78 */ 79 char cl_ipaddr[48]; 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 #endif /* CONFIG_NFS_V4 */ 106 107 #ifdef CONFIG_NFS_FSCACHE 108 struct fscache_cookie *fscache; /* client index cache cookie */ 109 #endif 110 111 struct net *cl_net; 112 }; 113 114 /* 115 * NFS client parameters stored in the superblock. 116 */ 117 struct nfs_server { 118 struct nfs_client * nfs_client; /* shared client and NFS4 state */ 119 struct list_head client_link; /* List of other nfs_server structs 120 * that share the same client 121 */ 122 struct list_head master_link; /* link in master servers list */ 123 struct rpc_clnt * client; /* RPC client handle */ 124 struct rpc_clnt * client_acl; /* ACL RPC client handle */ 125 struct nlm_host *nlm_host; /* NLM client handle */ 126 struct nfs_iostats __percpu *io_stats; /* I/O statistics */ 127 struct backing_dev_info backing_dev_info; 128 atomic_long_t writeback; /* number of writeback pages */ 129 int flags; /* various flags */ 130 unsigned int caps; /* server capabilities */ 131 unsigned int rsize; /* read size */ 132 unsigned int rpages; /* read size (in pages) */ 133 unsigned int wsize; /* write size */ 134 unsigned int wpages; /* write size (in pages) */ 135 unsigned int wtmult; /* server disk block size */ 136 unsigned int dtsize; /* readdir size */ 137 unsigned short port; /* "port=" setting */ 138 unsigned int bsize; /* server block size */ 139 unsigned int acregmin; /* attr cache timeouts */ 140 unsigned int acregmax; 141 unsigned int acdirmin; 142 unsigned int acdirmax; 143 unsigned int namelen; 144 unsigned int options; /* extra options enabled by mount */ 145 #define NFS_OPTION_FSCACHE 0x00000001 /* - local caching enabled */ 146 #define NFS_OPTION_MIGRATION 0x00000002 /* - NFSv4 migration enabled */ 147 148 struct nfs_fsid fsid; 149 __u64 maxfilesize; /* maximum file size */ 150 struct timespec time_delta; /* smallest time granularity */ 151 unsigned long mount_time; /* when this fs was mounted */ 152 struct super_block *super; /* VFS super block */ 153 dev_t s_dev; /* superblock dev numbers */ 154 struct nfs_auth_info auth_info; /* parsed auth flavors */ 155 156 #ifdef CONFIG_NFS_FSCACHE 157 struct nfs_fscache_key *fscache_key; /* unique key for superblock */ 158 struct fscache_cookie *fscache; /* superblock cookie */ 159 #endif 160 161 u32 pnfs_blksize; /* layout_blksize attr */ 162 #if IS_ENABLED(CONFIG_NFS_V4) 163 u32 attr_bitmask[3];/* V4 bitmask representing the set 164 of attributes supported on this 165 filesystem */ 166 u32 attr_bitmask_nl[3]; 167 /* V4 bitmask representing the 168 set of attributes supported 169 on this filesystem excluding 170 the label support bit. */ 171 u32 cache_consistency_bitmask[3]; 172 /* V4 bitmask representing the subset 173 of change attribute, size, ctime 174 and mtime attributes supported by 175 the server */ 176 u32 acl_bitmask; /* V4 bitmask representing the ACEs 177 that are supported on this 178 filesystem */ 179 u32 fh_expire_type; /* V4 bitmask representing file 180 handle volatility type for 181 this filesystem */ 182 struct pnfs_layoutdriver_type *pnfs_curr_ld; /* Active layout driver */ 183 struct rpc_wait_queue roc_rpcwaitq; 184 void *pnfs_ld_data; /* per mount point data */ 185 186 /* the following fields are protected by nfs_client->cl_lock */ 187 struct rb_root state_owners; 188 #endif 189 struct ida openowner_id; 190 struct ida lockowner_id; 191 struct list_head state_owners_lru; 192 struct list_head layouts; 193 struct list_head delegations; 194 195 unsigned long mig_gen; 196 unsigned long mig_status; 197 #define NFS_MIG_IN_TRANSITION (1) 198 #define NFS_MIG_FAILED (2) 199 200 void (*destroy)(struct nfs_server *); 201 202 atomic_t active; /* Keep trace of any activity to this server */ 203 204 /* mountd-related mount options */ 205 struct sockaddr_storage mountd_address; 206 size_t mountd_addrlen; 207 u32 mountd_version; 208 unsigned short mountd_port; 209 unsigned short mountd_protocol; 210 }; 211 212 /* Server capabilities */ 213 #define NFS_CAP_READDIRPLUS (1U << 0) 214 #define NFS_CAP_HARDLINKS (1U << 1) 215 #define NFS_CAP_SYMLINKS (1U << 2) 216 #define NFS_CAP_ACLS (1U << 3) 217 #define NFS_CAP_ATOMIC_OPEN (1U << 4) 218 #define NFS_CAP_CHANGE_ATTR (1U << 5) 219 #define NFS_CAP_FILEID (1U << 6) 220 #define NFS_CAP_MODE (1U << 7) 221 #define NFS_CAP_NLINK (1U << 8) 222 #define NFS_CAP_OWNER (1U << 9) 223 #define NFS_CAP_OWNER_GROUP (1U << 10) 224 #define NFS_CAP_ATIME (1U << 11) 225 #define NFS_CAP_CTIME (1U << 12) 226 #define NFS_CAP_MTIME (1U << 13) 227 #define NFS_CAP_POSIX_LOCK (1U << 14) 228 #define NFS_CAP_UIDGID_NOMAP (1U << 15) 229 #define NFS_CAP_STATEID_NFSV41 (1U << 16) 230 #define NFS_CAP_ATOMIC_OPEN_V1 (1U << 17) 231 #define NFS_CAP_SECURITY_LABEL (1U << 18) 232 233 #endif 234