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#define NFS_CS_PNFS 9 /* - Server used for pnfs */ 52 struct sockaddr_storage cl_addr; /* server identifier */ 53 size_t cl_addrlen; 54 char * cl_hostname; /* hostname of server */ 55 char * cl_acceptor; /* GSSAPI acceptor name */ 56 struct list_head cl_share_link; /* link in global client list */ 57 struct list_head cl_superblocks; /* List of nfs_server structs */ 58 59 struct rpc_clnt * cl_rpcclient; 60 const struct nfs_rpc_ops *rpc_ops; /* NFS protocol vector */ 61 int cl_proto; /* Network transport protocol */ 62 struct nfs_subversion * cl_nfs_mod; /* pointer to nfs version module */ 63 64 u32 cl_minorversion;/* NFSv4 minorversion */ 65 unsigned int cl_nconnect; /* Number of connections */ 66 unsigned int cl_max_connect; /* max number of xprts allowed */ 67 const char * cl_principal; /* used for machine cred */ 68 struct xprtsec_parms cl_xprtsec; /* xprt security policy */ 69 70#if IS_ENABLED(CONFIG_NFS_V4) 71 struct list_head cl_ds_clients; /* auth flavor data servers */ 72 u64 cl_clientid; /* constant */ 73 nfs4_verifier cl_confirm; /* Clientid verifier */ 74 unsigned long cl_state; 75 76 spinlock_t cl_lock; 77 78 unsigned long cl_lease_time; 79 unsigned long cl_last_renewal; 80 struct delayed_work cl_renewd; 81 82 struct rpc_wait_queue cl_rpcwaitq; 83 84 /* idmapper */ 85 struct idmap * cl_idmap; 86 87 /* Client owner identifier */ 88 const char * cl_owner_id; 89 90 u32 cl_cb_ident; /* v4.0 callback identifier */ 91 const struct nfs4_minor_version_ops *cl_mvops; 92 unsigned long cl_mig_gen; 93 94 /* NFSv4.0 transport blocking */ 95 struct nfs4_slot_table *cl_slot_tbl; 96 97 /* The sequence id to use for the next CREATE_SESSION */ 98 u32 cl_seqid; 99 /* The flags used for obtaining the clientid during EXCHANGE_ID */ 100 u32 cl_exchange_flags; 101 struct nfs4_session *cl_session; /* shared session */ 102 bool cl_preserve_clid; 103 struct nfs41_server_owner *cl_serverowner; 104 struct nfs41_server_scope *cl_serverscope; 105 struct nfs41_impl_id *cl_implid; 106 /* nfs 4.1+ state protection modes: */ 107 unsigned long cl_sp4_flags; 108#define NFS_SP4_MACH_CRED_MINIMAL 1 /* Minimal sp4_mach_cred - state ops 109 * must use machine cred */ 110#define NFS_SP4_MACH_CRED_CLEANUP 2 /* CLOSE and LOCKU */ 111#define NFS_SP4_MACH_CRED_SECINFO 3 /* SECINFO and SECINFO_NO_NAME */ 112#define NFS_SP4_MACH_CRED_STATEID 4 /* TEST_STATEID and FREE_STATEID */ 113#define NFS_SP4_MACH_CRED_WRITE 5 /* WRITE */ 114#define NFS_SP4_MACH_CRED_COMMIT 6 /* COMMIT */ 115#define NFS_SP4_MACH_CRED_PNFS_CLEANUP 7 /* LAYOUTRETURN */ 116#if IS_ENABLED(CONFIG_NFS_V4_1) 117 wait_queue_head_t cl_lock_waitq; 118#endif /* CONFIG_NFS_V4_1 */ 119#endif /* CONFIG_NFS_V4 */ 120 121 /* Our own IP address, as a null-terminated string. 122 * This is used to generate the mv0 callback address. 123 */ 124 char cl_ipaddr[48]; 125 struct net *cl_net; 126 struct list_head pending_cb_stateids; 127 struct rcu_head rcu; 128}; 129 130/* 131 * NFS client parameters stored in the superblock. 132 */ 133struct nfs_server { 134 struct nfs_client * nfs_client; /* shared client and NFS4 state */ 135 struct list_head client_link; /* List of other nfs_server structs 136 * that share the same client 137 */ 138 struct list_head master_link; /* link in master servers list */ 139 struct rpc_clnt * client; /* RPC client handle */ 140 struct rpc_clnt * client_acl; /* ACL RPC client handle */ 141 struct nlm_host *nlm_host; /* NLM client handle */ 142 struct nfs_iostats __percpu *io_stats; /* I/O statistics */ 143 atomic_long_t writeback; /* number of writeback pages */ 144 unsigned int write_congested;/* flag set when writeback gets too high */ 145 unsigned 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#define NFS_MOUNT_WRITE_EAGER 0x01000000 157#define NFS_MOUNT_WRITE_WAIT 0x02000000 158#define NFS_MOUNT_TRUNK_DISCOVERY 0x04000000 159#define NFS_MOUNT_SHUTDOWN 0x08000000 160 161 unsigned int fattr_valid; /* Valid attributes */ 162 unsigned int caps; /* server capabilities */ 163 unsigned int rsize; /* read size */ 164 unsigned int rpages; /* read size (in pages) */ 165 unsigned int wsize; /* write size */ 166 unsigned int wpages; /* write size (in pages) */ 167 unsigned int wtmult; /* server disk block size */ 168 unsigned int dtsize; /* readdir size */ 169 unsigned short port; /* "port=" setting */ 170 unsigned int bsize; /* server block size */ 171#ifdef CONFIG_NFS_V4_2 172 unsigned int gxasize; /* getxattr size */ 173 unsigned int sxasize; /* setxattr size */ 174 unsigned int lxasize; /* listxattr size */ 175#endif 176 unsigned int acregmin; /* attr cache timeouts */ 177 unsigned int acregmax; 178 unsigned int acdirmin; 179 unsigned int acdirmax; 180 unsigned int namelen; 181 unsigned int options; /* extra options enabled by mount */ 182 unsigned int clone_blksize; /* granularity of a CLONE operation */ 183#define NFS_OPTION_FSCACHE 0x00000001 /* - local caching enabled */ 184#define NFS_OPTION_MIGRATION 0x00000002 /* - NFSv4 migration enabled */ 185 186 enum nfs4_change_attr_type 187 change_attr_type;/* Description of change attribute */ 188 189 struct nfs_fsid fsid; 190 int s_sysfs_id; /* sysfs dentry index */ 191 __u64 maxfilesize; /* maximum file size */ 192 struct timespec64 time_delta; /* smallest time granularity */ 193 unsigned long mount_time; /* when this fs was mounted */ 194 struct super_block *super; /* VFS super block */ 195 dev_t s_dev; /* superblock dev numbers */ 196 struct nfs_auth_info auth_info; /* parsed auth flavors */ 197 198#ifdef CONFIG_NFS_FSCACHE 199 struct fscache_volume *fscache; /* superblock cookie */ 200 char *fscache_uniq; /* Uniquifier (or NULL) */ 201#endif 202 203 u32 pnfs_blksize; /* layout_blksize attr */ 204#if IS_ENABLED(CONFIG_NFS_V4) 205 u32 attr_bitmask[3];/* V4 bitmask representing the set 206 of attributes supported on this 207 filesystem */ 208 u32 attr_bitmask_nl[3]; 209 /* V4 bitmask representing the 210 set of attributes supported 211 on this filesystem excluding 212 the label support bit. */ 213 u32 exclcreat_bitmask[3]; 214 /* V4 bitmask representing the 215 set of attributes supported 216 on this filesystem for the 217 exclusive create. */ 218 u32 cache_consistency_bitmask[3]; 219 /* V4 bitmask representing the subset 220 of change attribute, size, ctime 221 and mtime attributes supported by 222 the server */ 223 u32 acl_bitmask; /* V4 bitmask representing the ACEs 224 that are supported on this 225 filesystem */ 226 u32 fh_expire_type; /* V4 bitmask representing file 227 handle volatility type for 228 this filesystem */ 229 struct pnfs_layoutdriver_type *pnfs_curr_ld; /* Active layout driver */ 230 struct rpc_wait_queue roc_rpcwaitq; 231 void *pnfs_ld_data; /* per mount point data */ 232 233 /* the following fields are protected by nfs_client->cl_lock */ 234 struct rb_root state_owners; 235#endif 236 struct ida openowner_id; 237 struct ida lockowner_id; 238 struct list_head state_owners_lru; 239 struct list_head layouts; 240 struct list_head delegations; 241 struct list_head ss_copies; 242 243 unsigned long delegation_gen; 244 unsigned long mig_gen; 245 unsigned long mig_status; 246#define NFS_MIG_IN_TRANSITION (1) 247#define NFS_MIG_FAILED (2) 248#define NFS_MIG_TSM_POSSIBLE (3) 249 250 void (*destroy)(struct nfs_server *); 251 252 atomic_t active; /* Keep trace of any activity to this server */ 253 254 /* mountd-related mount options */ 255 struct sockaddr_storage mountd_address; 256 size_t mountd_addrlen; 257 u32 mountd_version; 258 unsigned short mountd_port; 259 unsigned short mountd_protocol; 260 struct rpc_wait_queue uoc_rpcwaitq; 261 262 /* XDR related information */ 263 unsigned int read_hdrsize; 264 265 /* User namespace info */ 266 const struct cred *cred; 267 bool has_sec_mnt_opts; 268 struct kobject kobj; 269 struct rcu_head rcu; 270}; 271 272/* Server capabilities */ 273#define NFS_CAP_READDIRPLUS (1U << 0) 274#define NFS_CAP_HARDLINKS (1U << 1) 275#define NFS_CAP_SYMLINKS (1U << 2) 276#define NFS_CAP_ACLS (1U << 3) 277#define NFS_CAP_ATOMIC_OPEN (1U << 4) 278#define NFS_CAP_LGOPEN (1U << 5) 279#define NFS_CAP_CASE_INSENSITIVE (1U << 6) 280#define NFS_CAP_CASE_PRESERVING (1U << 7) 281#define NFS_CAP_POSIX_LOCK (1U << 14) 282#define NFS_CAP_UIDGID_NOMAP (1U << 15) 283#define NFS_CAP_STATEID_NFSV41 (1U << 16) 284#define NFS_CAP_ATOMIC_OPEN_V1 (1U << 17) 285#define NFS_CAP_SECURITY_LABEL (1U << 18) 286#define NFS_CAP_SEEK (1U << 19) 287#define NFS_CAP_ALLOCATE (1U << 20) 288#define NFS_CAP_DEALLOCATE (1U << 21) 289#define NFS_CAP_LAYOUTSTATS (1U << 22) 290#define NFS_CAP_CLONE (1U << 23) 291#define NFS_CAP_COPY (1U << 24) 292#define NFS_CAP_OFFLOAD_CANCEL (1U << 25) 293#define NFS_CAP_LAYOUTERROR (1U << 26) 294#define NFS_CAP_COPY_NOTIFY (1U << 27) 295#define NFS_CAP_XATTR (1U << 28) 296#define NFS_CAP_READ_PLUS (1U << 29) 297#define NFS_CAP_FS_LOCATIONS (1U << 30) 298#define NFS_CAP_MOVEABLE (1U << 31) 299#endif 300