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 15struct nfs4_session; 16struct nfs_iostats; 17struct nlm_host; 18struct nfs4_sequence_args; 19struct nfs4_sequence_res; 20struct nfs_server; 21struct nfs4_minor_version_ops; 22struct nfs41_server_scope; 23struct nfs41_impl_id; 24 25/* 26 * The nfs_client identifies our client state to the server. 27 */ 28struct 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 const char * cl_principal; /* used for machine cred */ 66 67#if IS_ENABLED(CONFIG_NFS_V4) 68 struct list_head cl_ds_clients; /* auth flavor data servers */ 69 u64 cl_clientid; /* constant */ 70 nfs4_verifier cl_confirm; /* Clientid verifier */ 71 unsigned long cl_state; 72 73 spinlock_t cl_lock; 74 75 unsigned long cl_lease_time; 76 unsigned long cl_last_renewal; 77 struct delayed_work cl_renewd; 78 79 struct rpc_wait_queue cl_rpcwaitq; 80 81 /* idmapper */ 82 struct idmap * cl_idmap; 83 84 /* Client owner identifier */ 85 const char * cl_owner_id; 86 87 u32 cl_cb_ident; /* v4.0 callback identifier */ 88 const struct nfs4_minor_version_ops *cl_mvops; 89 unsigned long cl_mig_gen; 90 91 /* NFSv4.0 transport blocking */ 92 struct nfs4_slot_table *cl_slot_tbl; 93 94 /* The sequence id to use for the next CREATE_SESSION */ 95 u32 cl_seqid; 96 /* The flags used for obtaining the clientid during EXCHANGE_ID */ 97 u32 cl_exchange_flags; 98 struct nfs4_session *cl_session; /* shared session */ 99 bool cl_preserve_clid; 100 struct nfs41_server_owner *cl_serverowner; 101 struct nfs41_server_scope *cl_serverscope; 102 struct nfs41_impl_id *cl_implid; 103 /* nfs 4.1+ state protection modes: */ 104 unsigned long cl_sp4_flags; 105#define NFS_SP4_MACH_CRED_MINIMAL 1 /* Minimal sp4_mach_cred - state ops 106 * must use machine cred */ 107#define NFS_SP4_MACH_CRED_CLEANUP 2 /* CLOSE and LOCKU */ 108#define NFS_SP4_MACH_CRED_SECINFO 3 /* SECINFO and SECINFO_NO_NAME */ 109#define NFS_SP4_MACH_CRED_STATEID 4 /* TEST_STATEID and FREE_STATEID */ 110#define NFS_SP4_MACH_CRED_WRITE 5 /* WRITE */ 111#define NFS_SP4_MACH_CRED_COMMIT 6 /* COMMIT */ 112#define NFS_SP4_MACH_CRED_PNFS_CLEANUP 7 /* LAYOUTRETURN */ 113#if IS_ENABLED(CONFIG_NFS_V4_1) 114 wait_queue_head_t cl_lock_waitq; 115#endif /* CONFIG_NFS_V4_1 */ 116#endif /* CONFIG_NFS_V4 */ 117 118 /* Our own IP address, as a null-terminated string. 119 * This is used to generate the mv0 callback address. 120 */ 121 char cl_ipaddr[48]; 122 123#ifdef CONFIG_NFS_FSCACHE 124 struct fscache_cookie *fscache; /* client index cache cookie */ 125#endif 126 127 struct net *cl_net; 128 struct list_head pending_cb_stateids; 129}; 130 131/* 132 * NFS client parameters stored in the superblock. 133 */ 134struct nfs_server { 135 struct nfs_client * nfs_client; /* shared client and NFS4 state */ 136 struct list_head client_link; /* List of other nfs_server structs 137 * that share the same client 138 */ 139 struct list_head master_link; /* link in master servers list */ 140 struct rpc_clnt * client; /* RPC client handle */ 141 struct rpc_clnt * client_acl; /* ACL RPC client handle */ 142 struct nlm_host *nlm_host; /* NLM client handle */ 143 struct nfs_iostats __percpu *io_stats; /* I/O statistics */ 144 atomic_long_t writeback; /* number of writeback pages */ 145 int flags; /* various flags */ 146 147/* The following are for internal use only. Also see uapi/linux/nfs_mount.h */ 148#define NFS_MOUNT_LOOKUP_CACHE_NONEG 0x10000 149#define NFS_MOUNT_LOOKUP_CACHE_NONE 0x20000 150#define NFS_MOUNT_NORESVPORT 0x40000 151#define NFS_MOUNT_LEGACY_INTERFACE 0x80000 152#define NFS_MOUNT_LOCAL_FLOCK 0x100000 153#define NFS_MOUNT_LOCAL_FCNTL 0x200000 154#define NFS_MOUNT_SOFTERR 0x400000 155#define NFS_MOUNT_SOFTREVAL 0x800000 156 157 unsigned int caps; /* server capabilities */ 158 unsigned int rsize; /* read size */ 159 unsigned int rpages; /* read size (in pages) */ 160 unsigned int wsize; /* write size */ 161 unsigned int wpages; /* write size (in pages) */ 162 unsigned int wtmult; /* server disk block size */ 163 unsigned int dtsize; /* readdir size */ 164 unsigned short port; /* "port=" setting */ 165 unsigned int bsize; /* server block size */ 166#ifdef CONFIG_NFS_V4_2 167 unsigned int gxasize; /* getxattr size */ 168 unsigned int sxasize; /* setxattr size */ 169 unsigned int lxasize; /* listxattr size */ 170#endif 171 unsigned int acregmin; /* attr cache timeouts */ 172 unsigned int acregmax; 173 unsigned int acdirmin; 174 unsigned int acdirmax; 175 unsigned int namelen; 176 unsigned int options; /* extra options enabled by mount */ 177 unsigned int clone_blksize; /* granularity of a CLONE operation */ 178#define NFS_OPTION_FSCACHE 0x00000001 /* - local caching enabled */ 179#define NFS_OPTION_MIGRATION 0x00000002 /* - NFSv4 migration enabled */ 180 181 struct nfs_fsid fsid; 182 __u64 maxfilesize; /* maximum file size */ 183 struct timespec64 time_delta; /* smallest time granularity */ 184 unsigned long mount_time; /* when this fs was mounted */ 185 struct super_block *super; /* VFS super block */ 186 dev_t s_dev; /* superblock dev numbers */ 187 struct nfs_auth_info auth_info; /* parsed auth flavors */ 188 189#ifdef CONFIG_NFS_FSCACHE 190 struct nfs_fscache_key *fscache_key; /* unique key for superblock */ 191 struct fscache_cookie *fscache; /* superblock cookie */ 192#endif 193 194 u32 pnfs_blksize; /* layout_blksize attr */ 195#if IS_ENABLED(CONFIG_NFS_V4) 196 u32 attr_bitmask[3];/* V4 bitmask representing the set 197 of attributes supported on this 198 filesystem */ 199 u32 attr_bitmask_nl[3]; 200 /* V4 bitmask representing the 201 set of attributes supported 202 on this filesystem excluding 203 the label support bit. */ 204 u32 exclcreat_bitmask[3]; 205 /* V4 bitmask representing the 206 set of attributes supported 207 on this filesystem for the 208 exclusive create. */ 209 u32 cache_consistency_bitmask[3]; 210 /* V4 bitmask representing the subset 211 of change attribute, size, ctime 212 and mtime attributes supported by 213 the server */ 214 u32 acl_bitmask; /* V4 bitmask representing the ACEs 215 that are supported on this 216 filesystem */ 217 u32 fh_expire_type; /* V4 bitmask representing file 218 handle volatility type for 219 this filesystem */ 220 struct pnfs_layoutdriver_type *pnfs_curr_ld; /* Active layout driver */ 221 struct rpc_wait_queue roc_rpcwaitq; 222 void *pnfs_ld_data; /* per mount point data */ 223 224 /* the following fields are protected by nfs_client->cl_lock */ 225 struct rb_root state_owners; 226#endif 227 struct ida openowner_id; 228 struct ida lockowner_id; 229 struct list_head state_owners_lru; 230 struct list_head layouts; 231 struct list_head delegations; 232 struct list_head ss_copies; 233 234 unsigned long mig_gen; 235 unsigned long mig_status; 236#define NFS_MIG_IN_TRANSITION (1) 237#define NFS_MIG_FAILED (2) 238#define NFS_MIG_TSM_POSSIBLE (3) 239 240 void (*destroy)(struct nfs_server *); 241 242 atomic_t active; /* Keep trace of any activity to this server */ 243 244 /* mountd-related mount options */ 245 struct sockaddr_storage mountd_address; 246 size_t mountd_addrlen; 247 u32 mountd_version; 248 unsigned short mountd_port; 249 unsigned short mountd_protocol; 250 struct rpc_wait_queue uoc_rpcwaitq; 251 252 /* XDR related information */ 253 unsigned int read_hdrsize; 254 255 /* User namespace info */ 256 const struct cred *cred; 257}; 258 259/* Server capabilities */ 260#define NFS_CAP_READDIRPLUS (1U << 0) 261#define NFS_CAP_HARDLINKS (1U << 1) 262#define NFS_CAP_SYMLINKS (1U << 2) 263#define NFS_CAP_ACLS (1U << 3) 264#define NFS_CAP_ATOMIC_OPEN (1U << 4) 265/* #define NFS_CAP_CHANGE_ATTR (1U << 5) */ 266#define NFS_CAP_LGOPEN (1U << 5) 267#define NFS_CAP_FILEID (1U << 6) 268#define NFS_CAP_MODE (1U << 7) 269#define NFS_CAP_NLINK (1U << 8) 270#define NFS_CAP_OWNER (1U << 9) 271#define NFS_CAP_OWNER_GROUP (1U << 10) 272#define NFS_CAP_ATIME (1U << 11) 273#define NFS_CAP_CTIME (1U << 12) 274#define NFS_CAP_MTIME (1U << 13) 275#define NFS_CAP_POSIX_LOCK (1U << 14) 276#define NFS_CAP_UIDGID_NOMAP (1U << 15) 277#define NFS_CAP_STATEID_NFSV41 (1U << 16) 278#define NFS_CAP_ATOMIC_OPEN_V1 (1U << 17) 279#define NFS_CAP_SECURITY_LABEL (1U << 18) 280#define NFS_CAP_SEEK (1U << 19) 281#define NFS_CAP_ALLOCATE (1U << 20) 282#define NFS_CAP_DEALLOCATE (1U << 21) 283#define NFS_CAP_LAYOUTSTATS (1U << 22) 284#define NFS_CAP_CLONE (1U << 23) 285#define NFS_CAP_COPY (1U << 24) 286#define NFS_CAP_OFFLOAD_CANCEL (1U << 25) 287#define NFS_CAP_LAYOUTERROR (1U << 26) 288#define NFS_CAP_COPY_NOTIFY (1U << 27) 289#define NFS_CAP_XATTR (1U << 28) 290#define NFS_CAP_READ_PLUS (1U << 29) 291 292#endif 293