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 13struct nfs4_session; 14struct nfs_iostats; 15struct nlm_host; 16struct nfs4_sequence_args; 17struct nfs4_sequence_res; 18struct nfs_server; 19struct nfs4_minor_version_ops; 20struct nfs41_server_scope; 21struct nfs41_impl_id; 22 23/* 24 * The nfs_client identifies our client state to the server. 25 */ 26struct 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 */ 123struct 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#define NFS_CAP_COPY (1U << 24) 250 251#endif 252