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#endif /* CONFIG_NFS_V4 */ 106 107 /* Our own IP address, as a null-terminated string. 108 * This is used to generate the mv0 callback address. 109 */ 110 char cl_ipaddr[48]; 111 112#ifdef CONFIG_NFS_FSCACHE 113 struct fscache_cookie *fscache; /* client index cache cookie */ 114#endif 115 116 struct net *cl_net; 117}; 118 119/* 120 * NFS client parameters stored in the superblock. 121 */ 122struct nfs_server { 123 struct nfs_client * nfs_client; /* shared client and NFS4 state */ 124 struct list_head client_link; /* List of other nfs_server structs 125 * that share the same client 126 */ 127 struct list_head master_link; /* link in master servers list */ 128 struct rpc_clnt * client; /* RPC client handle */ 129 struct rpc_clnt * client_acl; /* ACL RPC client handle */ 130 struct nlm_host *nlm_host; /* NLM client handle */ 131 struct nfs_iostats __percpu *io_stats; /* I/O statistics */ 132 struct backing_dev_info backing_dev_info; 133 atomic_long_t writeback; /* number of writeback pages */ 134 int flags; /* various flags */ 135 unsigned int caps; /* server capabilities */ 136 unsigned int rsize; /* read size */ 137 unsigned int rpages; /* read size (in pages) */ 138 unsigned int wsize; /* write size */ 139 unsigned int wpages; /* write size (in pages) */ 140 unsigned int wtmult; /* server disk block size */ 141 unsigned int dtsize; /* readdir size */ 142 unsigned short port; /* "port=" setting */ 143 unsigned int bsize; /* server block size */ 144 unsigned int acregmin; /* attr cache timeouts */ 145 unsigned int acregmax; 146 unsigned int acdirmin; 147 unsigned int acdirmax; 148 unsigned int namelen; 149 unsigned int options; /* extra options enabled by mount */ 150#define NFS_OPTION_FSCACHE 0x00000001 /* - local caching enabled */ 151#define NFS_OPTION_MIGRATION 0x00000002 /* - NFSv4 migration enabled */ 152 153 struct nfs_fsid fsid; 154 __u64 maxfilesize; /* maximum file size */ 155 struct timespec time_delta; /* smallest time granularity */ 156 unsigned long mount_time; /* when this fs was mounted */ 157 struct super_block *super; /* VFS super block */ 158 dev_t s_dev; /* superblock dev numbers */ 159 struct nfs_auth_info auth_info; /* parsed auth flavors */ 160 161#ifdef CONFIG_NFS_FSCACHE 162 struct nfs_fscache_key *fscache_key; /* unique key for superblock */ 163 struct fscache_cookie *fscache; /* superblock cookie */ 164#endif 165 166 u32 pnfs_blksize; /* layout_blksize attr */ 167#if IS_ENABLED(CONFIG_NFS_V4) 168 u32 attr_bitmask[3];/* V4 bitmask representing the set 169 of attributes supported on this 170 filesystem */ 171 u32 attr_bitmask_nl[3]; 172 /* V4 bitmask representing the 173 set of attributes supported 174 on this filesystem excluding 175 the label support bit. */ 176 u32 cache_consistency_bitmask[3]; 177 /* V4 bitmask representing the subset 178 of change attribute, size, ctime 179 and mtime attributes supported by 180 the server */ 181 u32 acl_bitmask; /* V4 bitmask representing the ACEs 182 that are supported on this 183 filesystem */ 184 u32 fh_expire_type; /* V4 bitmask representing file 185 handle volatility type for 186 this filesystem */ 187 struct pnfs_layoutdriver_type *pnfs_curr_ld; /* Active layout driver */ 188 struct rpc_wait_queue roc_rpcwaitq; 189 void *pnfs_ld_data; /* per mount point data */ 190 191 /* the following fields are protected by nfs_client->cl_lock */ 192 struct rb_root state_owners; 193#endif 194 struct ida openowner_id; 195 struct ida lockowner_id; 196 struct list_head state_owners_lru; 197 struct list_head layouts; 198 struct list_head delegations; 199 200 unsigned long mig_gen; 201 unsigned long mig_status; 202#define NFS_MIG_IN_TRANSITION (1) 203#define NFS_MIG_FAILED (2) 204 205 void (*destroy)(struct nfs_server *); 206 207 atomic_t active; /* Keep trace of any activity to this server */ 208 209 /* mountd-related mount options */ 210 struct sockaddr_storage mountd_address; 211 size_t mountd_addrlen; 212 u32 mountd_version; 213 unsigned short mountd_port; 214 unsigned short mountd_protocol; 215}; 216 217/* Server capabilities */ 218#define NFS_CAP_READDIRPLUS (1U << 0) 219#define NFS_CAP_HARDLINKS (1U << 1) 220#define NFS_CAP_SYMLINKS (1U << 2) 221#define NFS_CAP_ACLS (1U << 3) 222#define NFS_CAP_ATOMIC_OPEN (1U << 4) 223/* #define NFS_CAP_CHANGE_ATTR (1U << 5) */ 224#define NFS_CAP_FILEID (1U << 6) 225#define NFS_CAP_MODE (1U << 7) 226#define NFS_CAP_NLINK (1U << 8) 227#define NFS_CAP_OWNER (1U << 9) 228#define NFS_CAP_OWNER_GROUP (1U << 10) 229#define NFS_CAP_ATIME (1U << 11) 230#define NFS_CAP_CTIME (1U << 12) 231#define NFS_CAP_MTIME (1U << 13) 232#define NFS_CAP_POSIX_LOCK (1U << 14) 233#define NFS_CAP_UIDGID_NOMAP (1U << 15) 234#define NFS_CAP_STATEID_NFSV41 (1U << 16) 235#define NFS_CAP_ATOMIC_OPEN_V1 (1U << 17) 236#define NFS_CAP_SECURITY_LABEL (1U << 18) 237#define NFS_CAP_SEEK (1U << 19) 238#define NFS_CAP_ALLOCATE (1U << 20) 239#define NFS_CAP_DEALLOCATE (1U << 21) 240 241#endif 242