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 struct sockaddr_storage cl_addr; /* server identifier */ 45 size_t cl_addrlen; 46 char * cl_hostname; /* hostname of server */ 47 struct list_head cl_share_link; /* link in global client list */ 48 struct list_head cl_superblocks; /* List of nfs_server structs */ 49 50 struct rpc_clnt * cl_rpcclient; 51 const struct nfs_rpc_ops *rpc_ops; /* NFS protocol vector */ 52 int cl_proto; /* Network transport protocol */ 53 struct nfs_subversion * cl_nfs_mod; /* pointer to nfs version module */ 54 55 u32 cl_minorversion;/* NFSv4 minorversion */ 56 struct rpc_cred *cl_machine_cred; 57 58#if IS_ENABLED(CONFIG_NFS_V4) 59 u64 cl_clientid; /* constant */ 60 nfs4_verifier cl_confirm; /* Clientid verifier */ 61 unsigned long cl_state; 62 63 spinlock_t cl_lock; 64 65 unsigned long cl_lease_time; 66 unsigned long cl_last_renewal; 67 struct delayed_work cl_renewd; 68 69 struct rpc_wait_queue cl_rpcwaitq; 70 71 /* idmapper */ 72 struct idmap * cl_idmap; 73 74 /* Our own IP address, as a null-terminated string. 75 * This is used to generate the mv0 callback address. 76 */ 77 char cl_ipaddr[48]; 78 u32 cl_cb_ident; /* v4.0 callback identifier */ 79 const struct nfs4_minor_version_ops *cl_mvops; 80 81 /* The sequence id to use for the next CREATE_SESSION */ 82 u32 cl_seqid; 83 /* The flags used for obtaining the clientid during EXCHANGE_ID */ 84 u32 cl_exchange_flags; 85 struct nfs4_session *cl_session; /* shared session */ 86 bool cl_preserve_clid; 87 struct nfs41_server_owner *cl_serverowner; 88 struct nfs41_server_scope *cl_serverscope; 89 struct nfs41_impl_id *cl_implid; 90#endif /* CONFIG_NFS_V4 */ 91 92#ifdef CONFIG_NFS_FSCACHE 93 struct fscache_cookie *fscache; /* client index cache cookie */ 94#endif 95 96 struct net *cl_net; 97}; 98 99/* 100 * NFS client parameters stored in the superblock. 101 */ 102struct nfs_server { 103 struct nfs_client * nfs_client; /* shared client and NFS4 state */ 104 struct list_head client_link; /* List of other nfs_server structs 105 * that share the same client 106 */ 107 struct list_head master_link; /* link in master servers list */ 108 struct rpc_clnt * client; /* RPC client handle */ 109 struct rpc_clnt * client_acl; /* ACL RPC client handle */ 110 struct nlm_host *nlm_host; /* NLM client handle */ 111 struct nfs_iostats __percpu *io_stats; /* I/O statistics */ 112 struct backing_dev_info backing_dev_info; 113 atomic_long_t writeback; /* number of writeback pages */ 114 int flags; /* various flags */ 115 unsigned int caps; /* server capabilities */ 116 unsigned int rsize; /* read size */ 117 unsigned int rpages; /* read size (in pages) */ 118 unsigned int wsize; /* write size */ 119 unsigned int wpages; /* write size (in pages) */ 120 unsigned int wtmult; /* server disk block size */ 121 unsigned int dtsize; /* readdir size */ 122 unsigned short port; /* "port=" setting */ 123 unsigned int bsize; /* server block size */ 124 unsigned int acregmin; /* attr cache timeouts */ 125 unsigned int acregmax; 126 unsigned int acdirmin; 127 unsigned int acdirmax; 128 unsigned int namelen; 129 unsigned int options; /* extra options enabled by mount */ 130#define NFS_OPTION_FSCACHE 0x00000001 /* - local caching enabled */ 131#define NFS_OPTION_MIGRATION 0x00000002 /* - NFSv4 migration enabled */ 132 133 struct nfs_fsid fsid; 134 __u64 maxfilesize; /* maximum file size */ 135 struct timespec time_delta; /* smallest time granularity */ 136 unsigned long mount_time; /* when this fs was mounted */ 137 dev_t s_dev; /* superblock dev numbers */ 138 139#ifdef CONFIG_NFS_FSCACHE 140 struct nfs_fscache_key *fscache_key; /* unique key for superblock */ 141 struct fscache_cookie *fscache; /* superblock cookie */ 142#endif 143 144 u32 pnfs_blksize; /* layout_blksize attr */ 145#if IS_ENABLED(CONFIG_NFS_V4) 146 u32 attr_bitmask[3];/* V4 bitmask representing the set 147 of attributes supported on this 148 filesystem */ 149 u32 attr_bitmask_nl[3]; 150 /* V4 bitmask representing the 151 set of attributes supported 152 on this filesystem excluding 153 the label support bit. */ 154 u32 cache_consistency_bitmask[3]; 155 /* V4 bitmask representing the subset 156 of change attribute, size, ctime 157 and mtime attributes supported by 158 the server */ 159 u32 acl_bitmask; /* V4 bitmask representing the ACEs 160 that are supported on this 161 filesystem */ 162 u32 fh_expire_type; /* V4 bitmask representing file 163 handle volatility type for 164 this filesystem */ 165 struct pnfs_layoutdriver_type *pnfs_curr_ld; /* Active layout driver */ 166 struct rpc_wait_queue roc_rpcwaitq; 167 void *pnfs_ld_data; /* per mount point data */ 168 169 /* the following fields are protected by nfs_client->cl_lock */ 170 struct rb_root state_owners; 171#endif 172 struct ida openowner_id; 173 struct ida lockowner_id; 174 struct list_head state_owners_lru; 175 struct list_head layouts; 176 struct list_head delegations; 177 void (*destroy)(struct nfs_server *); 178 179 atomic_t active; /* Keep trace of any activity to this server */ 180 181 /* mountd-related mount options */ 182 struct sockaddr_storage mountd_address; 183 size_t mountd_addrlen; 184 u32 mountd_version; 185 unsigned short mountd_port; 186 unsigned short mountd_protocol; 187}; 188 189/* Server capabilities */ 190#define NFS_CAP_READDIRPLUS (1U << 0) 191#define NFS_CAP_HARDLINKS (1U << 1) 192#define NFS_CAP_SYMLINKS (1U << 2) 193#define NFS_CAP_ACLS (1U << 3) 194#define NFS_CAP_ATOMIC_OPEN (1U << 4) 195#define NFS_CAP_CHANGE_ATTR (1U << 5) 196#define NFS_CAP_FILEID (1U << 6) 197#define NFS_CAP_MODE (1U << 7) 198#define NFS_CAP_NLINK (1U << 8) 199#define NFS_CAP_OWNER (1U << 9) 200#define NFS_CAP_OWNER_GROUP (1U << 10) 201#define NFS_CAP_ATIME (1U << 11) 202#define NFS_CAP_CTIME (1U << 12) 203#define NFS_CAP_MTIME (1U << 13) 204#define NFS_CAP_POSIX_LOCK (1U << 14) 205#define NFS_CAP_UIDGID_NOMAP (1U << 15) 206#define NFS_CAP_STATEID_NFSV41 (1U << 16) 207#define NFS_CAP_ATOMIC_OPEN_V1 (1U << 17) 208#define NFS_CAP_SECURITY_LABEL (1U << 18) 209 210#endif 211