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 14struct nfs4_session; 15struct nfs_iostats; 16struct nlm_host; 17struct nfs4_sequence_args; 18struct nfs4_sequence_res; 19struct nfs_server; 20struct nfs4_minor_version_ops; 21struct nfs41_server_scope; 22struct nfs41_impl_id; 23 24/* 25 * The nfs_client identifies our client state to the server. 26 */ 27struct nfs_client { 28 atomic_t cl_count; 29 atomic_t cl_mds_count; 30 int cl_cons_state; /* current construction state (-ve: init error) */ 31#define NFS_CS_READY 0 /* ready to be used */ 32#define NFS_CS_INITING 1 /* busy initialising */ 33#define NFS_CS_SESSION_INITING 2 /* busy initialising session */ 34 unsigned long cl_res_state; /* NFS resources state */ 35#define NFS_CS_CALLBACK 1 /* - callback started */ 36#define NFS_CS_IDMAP 2 /* - idmap started */ 37#define NFS_CS_RENEWD 3 /* - renewd started */ 38#define NFS_CS_STOP_RENEW 4 /* no more state to renew */ 39#define NFS_CS_CHECK_LEASE_TIME 5 /* need to check lease time */ 40 unsigned long cl_flags; /* behavior switches */ 41#define NFS_CS_NORESVPORT 0 /* - use ephemeral src port */ 42#define NFS_CS_DISCRTRY 1 /* - disconnect on RPC retry */ 43#define NFS_CS_MIGRATION 2 /* - transparent state migr */ 44#define NFS_CS_INFINITE_SLOTS 3 /* - don't limit TCP slots */ 45#define NFS_CS_NO_RETRANS_TIMEOUT 4 /* - Disable retransmit timeouts */ 46#define NFS_CS_TSM_POSSIBLE 5 /* - Maybe state migration */ 47 struct sockaddr_storage cl_addr; /* server identifier */ 48 size_t cl_addrlen; 49 char * cl_hostname; /* hostname of server */ 50 char * cl_acceptor; /* GSSAPI acceptor name */ 51 struct list_head cl_share_link; /* link in global client list */ 52 struct list_head cl_superblocks; /* List of nfs_server structs */ 53 54 struct rpc_clnt * cl_rpcclient; 55 const struct nfs_rpc_ops *rpc_ops; /* NFS protocol vector */ 56 int cl_proto; /* Network transport protocol */ 57 struct nfs_subversion * cl_nfs_mod; /* pointer to nfs version module */ 58 59 u32 cl_minorversion;/* NFSv4 minorversion */ 60 struct rpc_cred *cl_machine_cred; 61 62#if IS_ENABLED(CONFIG_NFS_V4) 63 struct list_head cl_ds_clients; /* auth flavor data servers */ 64 u64 cl_clientid; /* constant */ 65 nfs4_verifier cl_confirm; /* Clientid verifier */ 66 unsigned long cl_state; 67 68 spinlock_t cl_lock; 69 70 unsigned long cl_lease_time; 71 unsigned long cl_last_renewal; 72 struct delayed_work cl_renewd; 73 74 struct rpc_wait_queue cl_rpcwaitq; 75 76 /* idmapper */ 77 struct idmap * cl_idmap; 78 79 /* Client owner identifier */ 80 const char * cl_owner_id; 81 82 u32 cl_cb_ident; /* v4.0 callback identifier */ 83 const struct nfs4_minor_version_ops *cl_mvops; 84 unsigned long cl_mig_gen; 85 86 /* NFSv4.0 transport blocking */ 87 struct nfs4_slot_table *cl_slot_tbl; 88 89 /* The sequence id to use for the next CREATE_SESSION */ 90 u32 cl_seqid; 91 /* The flags used for obtaining the clientid during EXCHANGE_ID */ 92 u32 cl_exchange_flags; 93 struct nfs4_session *cl_session; /* shared session */ 94 bool cl_preserve_clid; 95 struct nfs41_server_owner *cl_serverowner; 96 struct nfs41_server_scope *cl_serverscope; 97 struct nfs41_impl_id *cl_implid; 98 /* nfs 4.1+ state protection modes: */ 99 unsigned long cl_sp4_flags; 100#define NFS_SP4_MACH_CRED_MINIMAL 1 /* Minimal sp4_mach_cred - state ops 101 * must use machine cred */ 102#define NFS_SP4_MACH_CRED_CLEANUP 2 /* CLOSE and LOCKU */ 103#define NFS_SP4_MACH_CRED_SECINFO 3 /* SECINFO and SECINFO_NO_NAME */ 104#define NFS_SP4_MACH_CRED_STATEID 4 /* TEST_STATEID and FREE_STATEID */ 105#define NFS_SP4_MACH_CRED_WRITE 5 /* WRITE */ 106#define NFS_SP4_MACH_CRED_COMMIT 6 /* COMMIT */ 107#define NFS_SP4_MACH_CRED_PNFS_CLEANUP 7 /* LAYOUTRETURN */ 108#if IS_ENABLED(CONFIG_NFS_V4_1) 109 wait_queue_head_t cl_lock_waitq; 110#endif /* CONFIG_NFS_V4_1 */ 111#endif /* CONFIG_NFS_V4 */ 112 113 /* Our own IP address, as a null-terminated string. 114 * This is used to generate the mv0 callback address. 115 */ 116 char cl_ipaddr[48]; 117 118#ifdef CONFIG_NFS_FSCACHE 119 struct fscache_cookie *fscache; /* client index cache cookie */ 120#endif 121 122 struct net *cl_net; 123}; 124 125/* 126 * NFS client parameters stored in the superblock. 127 */ 128struct nfs_server { 129 struct nfs_client * nfs_client; /* shared client and NFS4 state */ 130 struct list_head client_link; /* List of other nfs_server structs 131 * that share the same client 132 */ 133 struct list_head master_link; /* link in master servers list */ 134 struct rpc_clnt * client; /* RPC client handle */ 135 struct rpc_clnt * client_acl; /* ACL RPC client handle */ 136 struct nlm_host *nlm_host; /* NLM client handle */ 137 struct nfs_iostats __percpu *io_stats; /* I/O statistics */ 138 atomic_long_t writeback; /* number of writeback pages */ 139 int flags; /* various flags */ 140 unsigned int caps; /* server capabilities */ 141 unsigned int rsize; /* read size */ 142 unsigned int rpages; /* read size (in pages) */ 143 unsigned int wsize; /* write size */ 144 unsigned int wpages; /* write size (in pages) */ 145 unsigned int wtmult; /* server disk block size */ 146 unsigned int dtsize; /* readdir size */ 147 unsigned short port; /* "port=" setting */ 148 unsigned int bsize; /* server block size */ 149 unsigned int acregmin; /* attr cache timeouts */ 150 unsigned int acregmax; 151 unsigned int acdirmin; 152 unsigned int acdirmax; 153 unsigned int namelen; 154 unsigned int options; /* extra options enabled by mount */ 155 unsigned int clone_blksize; /* granularity of a CLONE operation */ 156#define NFS_OPTION_FSCACHE 0x00000001 /* - local caching enabled */ 157#define NFS_OPTION_MIGRATION 0x00000002 /* - NFSv4 migration enabled */ 158 159 struct nfs_fsid fsid; 160 __u64 maxfilesize; /* maximum file size */ 161 struct timespec time_delta; /* smallest time granularity */ 162 unsigned long mount_time; /* when this fs was mounted */ 163 struct super_block *super; /* VFS super block */ 164 dev_t s_dev; /* superblock dev numbers */ 165 struct nfs_auth_info auth_info; /* parsed auth flavors */ 166 167#ifdef CONFIG_NFS_FSCACHE 168 struct nfs_fscache_key *fscache_key; /* unique key for superblock */ 169 struct fscache_cookie *fscache; /* superblock cookie */ 170#endif 171 172 u32 pnfs_blksize; /* layout_blksize attr */ 173#if IS_ENABLED(CONFIG_NFS_V4) 174 u32 attr_bitmask[3];/* V4 bitmask representing the set 175 of attributes supported on this 176 filesystem */ 177 u32 attr_bitmask_nl[3]; 178 /* V4 bitmask representing the 179 set of attributes supported 180 on this filesystem excluding 181 the label support bit. */ 182 u32 exclcreat_bitmask[3]; 183 /* V4 bitmask representing the 184 set of attributes supported 185 on this filesystem for the 186 exclusive create. */ 187 u32 cache_consistency_bitmask[3]; 188 /* V4 bitmask representing the subset 189 of change attribute, size, ctime 190 and mtime attributes supported by 191 the server */ 192 u32 acl_bitmask; /* V4 bitmask representing the ACEs 193 that are supported on this 194 filesystem */ 195 u32 fh_expire_type; /* V4 bitmask representing file 196 handle volatility type for 197 this filesystem */ 198 struct pnfs_layoutdriver_type *pnfs_curr_ld; /* Active layout driver */ 199 struct rpc_wait_queue roc_rpcwaitq; 200 void *pnfs_ld_data; /* per mount point data */ 201 202 /* the following fields are protected by nfs_client->cl_lock */ 203 struct rb_root state_owners; 204#endif 205 struct ida openowner_id; 206 struct ida lockowner_id; 207 struct list_head state_owners_lru; 208 struct list_head layouts; 209 struct list_head delegations; 210 211 unsigned long mig_gen; 212 unsigned long mig_status; 213#define NFS_MIG_IN_TRANSITION (1) 214#define NFS_MIG_FAILED (2) 215#define NFS_MIG_TSM_POSSIBLE (3) 216 217 void (*destroy)(struct nfs_server *); 218 219 atomic_t active; /* Keep trace of any activity to this server */ 220 221 /* mountd-related mount options */ 222 struct sockaddr_storage mountd_address; 223 size_t mountd_addrlen; 224 u32 mountd_version; 225 unsigned short mountd_port; 226 unsigned short mountd_protocol; 227 struct rpc_wait_queue uoc_rpcwaitq; 228}; 229 230/* Server capabilities */ 231#define NFS_CAP_READDIRPLUS (1U << 0) 232#define NFS_CAP_HARDLINKS (1U << 1) 233#define NFS_CAP_SYMLINKS (1U << 2) 234#define NFS_CAP_ACLS (1U << 3) 235#define NFS_CAP_ATOMIC_OPEN (1U << 4) 236/* #define NFS_CAP_CHANGE_ATTR (1U << 5) */ 237#define NFS_CAP_FILEID (1U << 6) 238#define NFS_CAP_MODE (1U << 7) 239#define NFS_CAP_NLINK (1U << 8) 240#define NFS_CAP_OWNER (1U << 9) 241#define NFS_CAP_OWNER_GROUP (1U << 10) 242#define NFS_CAP_ATIME (1U << 11) 243#define NFS_CAP_CTIME (1U << 12) 244#define NFS_CAP_MTIME (1U << 13) 245#define NFS_CAP_POSIX_LOCK (1U << 14) 246#define NFS_CAP_UIDGID_NOMAP (1U << 15) 247#define NFS_CAP_STATEID_NFSV41 (1U << 16) 248#define NFS_CAP_ATOMIC_OPEN_V1 (1U << 17) 249#define NFS_CAP_SECURITY_LABEL (1U << 18) 250#define NFS_CAP_SEEK (1U << 19) 251#define NFS_CAP_ALLOCATE (1U << 20) 252#define NFS_CAP_DEALLOCATE (1U << 21) 253#define NFS_CAP_LAYOUTSTATS (1U << 22) 254#define NFS_CAP_CLONE (1U << 23) 255#define NFS_CAP_COPY (1U << 24) 256 257#endif 258