Edit File: nfs_fs_sb.h
#ifndef _NFS_FS_SB #define _NFS_FS_SB #include <linux/list.h> #include <linux/backing-dev.h> #include <linux/idr.h> #include <linux/wait.h> #include <linux/nfs_xdr.h> #include <linux/sunrpc/xprt.h> #include <linux/atomic.h> struct nfs4_session; struct nfs_iostats; struct nlm_host; struct nfs4_sequence_args; struct nfs4_sequence_res; struct nfs_server; struct nfs4_minor_version_ops; struct nfs41_server_scope; struct nfs41_impl_id; /* * The nfs_client identifies our client state to the server. */ struct nfs_client { atomic_t cl_count; atomic_t cl_mds_count; int cl_cons_state; /* current construction state (-ve: init error) */ #define NFS_CS_READY 0 /* ready to be used */ #define NFS_CS_INITING 1 /* busy initialising */ #define NFS_CS_SESSION_INITING 2 /* busy initialising session */ unsigned long cl_res_state; /* NFS resources state */ #define NFS_CS_CALLBACK 1 /* - callback started */ #define NFS_CS_IDMAP 2 /* - idmap started */ #define NFS_CS_RENEWD 3 /* - renewd started */ #define NFS_CS_STOP_RENEW 4 /* no more state to renew */ #define NFS_CS_CHECK_LEASE_TIME 5 /* need to check lease time */ unsigned long cl_flags; /* behavior switches */ #define NFS_CS_NORESVPORT 0 /* - use ephemeral src port */ #define NFS_CS_DISCRTRY 1 /* - disconnect on RPC retry */ #define NFS_CS_MIGRATION 2 /* - transparent state migr */ #define NFS_CS_INFINITE_SLOTS 3 /* - don't limit TCP slots */ #define NFS_CS_NO_RETRANS_TIMEOUT 4 /* - Disable retransmit timeouts */ struct sockaddr_storage cl_addr; /* server identifier */ size_t cl_addrlen; char * cl_hostname; /* hostname of server */ char * cl_acceptor; /* GSSAPI acceptor name */ struct list_head cl_share_link; /* link in global client list */ struct list_head cl_superblocks; /* List of nfs_server structs */ struct rpc_clnt * cl_rpcclient; const struct nfs_rpc_ops *rpc_ops; /* NFS protocol vector */ int cl_proto; /* Network transport protocol */ struct nfs_subversion * cl_nfs_mod; /* pointer to nfs version module */ u32 cl_minorversion;/* NFSv4 minorversion */ struct rpc_cred *cl_machine_cred; #if IS_ENABLED(CONFIG_NFS_V4) struct list_head cl_ds_clients; /* auth flavor data servers */ u64 cl_clientid; /* constant */ nfs4_verifier cl_confirm; /* Clientid verifier */ unsigned long cl_state; spinlock_t cl_lock; unsigned long cl_lease_time; unsigned long cl_last_renewal; struct delayed_work cl_renewd; struct rpc_wait_queue cl_rpcwaitq; /* idmapper */ struct idmap * cl_idmap; /* Client owner identifier */ const char * cl_owner_id; u32 cl_cb_ident; /* v4.0 callback identifier */ const struct nfs4_minor_version_ops *cl_mvops; unsigned long cl_mig_gen; /* NFSv4.0 transport blocking */ struct nfs4_slot_table *cl_slot_tbl; /* The sequence id to use for the next CREATE_SESSION */ u32 cl_seqid; /* The flags used for obtaining the clientid during EXCHANGE_ID */ u32 cl_exchange_flags; struct nfs4_session *cl_session; /* shared session */ bool cl_preserve_clid; struct nfs41_server_owner *cl_serverowner; struct nfs41_server_scope *cl_serverscope; struct nfs41_impl_id *cl_implid; /* nfs 4.1+ state protection modes: */ unsigned long cl_sp4_flags; #define NFS_SP4_MACH_CRED_MINIMAL 1 /* Minimal sp4_mach_cred - state ops * must use machine cred */ #define NFS_SP4_MACH_CRED_CLEANUP 2 /* CLOSE and LOCKU */ #define NFS_SP4_MACH_CRED_SECINFO 3 /* SECINFO and SECINFO_NO_NAME */ #define NFS_SP4_MACH_CRED_STATEID 4 /* TEST_STATEID and FREE_STATEID */ #define NFS_SP4_MACH_CRED_WRITE 5 /* WRITE */ #define NFS_SP4_MACH_CRED_COMMIT 6 /* COMMIT */ #if IS_ENABLED(CONFIG_NFS_V4_1) wait_queue_head_t cl_lock_waitq; #endif /* CONFIG_NFS_V4_1 */ #endif /* CONFIG_NFS_V4 */ /* Our own IP address, as a null-terminated string. * This is used to generate the mv0 callback address. */ char cl_ipaddr[48]; #ifdef CONFIG_NFS_FSCACHE struct fscache_cookie *fscache; /* client index cache cookie */ #endif struct net *cl_net; }; /* * NFS client parameters stored in the superblock. */ struct nfs_server { struct nfs_client * nfs_client; /* shared client and NFS4 state */ struct list_head client_link; /* List of other nfs_server structs * that share the same client */ struct list_head master_link; /* link in master servers list */ struct rpc_clnt * client; /* RPC client handle */ struct rpc_clnt * client_acl; /* ACL RPC client handle */ struct nlm_host *nlm_host; /* NLM client handle */ struct nfs_iostats __percpu *io_stats; /* I/O statistics */ struct backing_dev_info backing_dev_info; atomic_long_t writeback; /* number of writeback pages */ int flags; /* various flags */ unsigned int caps; /* server capabilities */ unsigned int rsize; /* read size */ unsigned int rpages; /* read size (in pages) */ unsigned int wsize; /* write size */ unsigned int wpages; /* write size (in pages) */ unsigned int wtmult; /* server disk block size */ unsigned int dtsize; /* readdir size */ unsigned short port; /* "port=" setting */ unsigned int bsize; /* server block size */ unsigned int acregmin; /* attr cache timeouts */ unsigned int acregmax; unsigned int acdirmin; unsigned int acdirmax; unsigned int namelen; unsigned int options; /* extra options enabled by mount */ unsigned int clone_blksize; /* granularity of a CLONE operation */ #define NFS_OPTION_FSCACHE 0x00000001 /* - local caching enabled */ #define NFS_OPTION_MIGRATION 0x00000002 /* - NFSv4 migration enabled */ struct nfs_fsid fsid; __u64 maxfilesize; /* maximum file size */ struct timespec time_delta; /* smallest time granularity */ unsigned long mount_time; /* when this fs was mounted */ struct super_block *super; /* VFS super block */ dev_t s_dev; /* superblock dev numbers */ struct nfs_auth_info auth_info; /* parsed auth flavors */ #ifdef CONFIG_NFS_FSCACHE struct nfs_fscache_key *fscache_key; /* unique key for superblock */ struct fscache_cookie *fscache; /* superblock cookie */ #endif u32 pnfs_blksize; /* layout_blksize attr */ #if IS_ENABLED(CONFIG_NFS_V4) u32 attr_bitmask[3];/* V4 bitmask representing the set of attributes supported on this filesystem */ u32 attr_bitmask_nl[3]; /* V4 bitmask representing the set of attributes supported on this filesystem excluding the label support bit. */ u32 exclcreat_bitmask[3]; /* V4 bitmask representing the set of attributes supported on this filesystem for the exclusive create. */ u32 cache_consistency_bitmask[3]; /* V4 bitmask representing the subset of change attribute, size, ctime and mtime attributes supported by the server */ u32 acl_bitmask; /* V4 bitmask representing the ACEs that are supported on this filesystem */ u32 fh_expire_type; /* V4 bitmask representing file handle volatility type for this filesystem */ struct pnfs_layoutdriver_type *pnfs_curr_ld; /* Active layout driver */ struct rpc_wait_queue roc_rpcwaitq; void *pnfs_ld_data; /* per mount point data */ /* the following fields are protected by nfs_client->cl_lock */ struct rb_root state_owners; #endif struct ida openowner_id; struct ida lockowner_id; struct list_head state_owners_lru; struct list_head layouts; struct list_head delegations; unsigned long mig_gen; unsigned long mig_status; #define NFS_MIG_IN_TRANSITION (1) #define NFS_MIG_FAILED (2) void (*destroy)(struct nfs_server *); atomic_t active; /* Keep trace of any activity to this server */ /* mountd-related mount options */ struct sockaddr_storage mountd_address; size_t mountd_addrlen; u32 mountd_version; unsigned short mountd_port; unsigned short mountd_protocol; struct rpc_wait_queue uoc_rpcwaitq; }; /* Server capabilities */ #define NFS_CAP_READDIRPLUS (1U << 0) #define NFS_CAP_HARDLINKS (1U << 1) #define NFS_CAP_SYMLINKS (1U << 2) #define NFS_CAP_ACLS (1U << 3) #define NFS_CAP_ATOMIC_OPEN (1U << 4) /* #define NFS_CAP_CHANGE_ATTR (1U << 5) */ #define NFS_CAP_FILEID (1U << 6) #define NFS_CAP_MODE (1U << 7) #define NFS_CAP_NLINK (1U << 8) #define NFS_CAP_OWNER (1U << 9) #define NFS_CAP_OWNER_GROUP (1U << 10) #define NFS_CAP_ATIME (1U << 11) #define NFS_CAP_CTIME (1U << 12) #define NFS_CAP_MTIME (1U << 13) #define NFS_CAP_POSIX_LOCK (1U << 14) #define NFS_CAP_UIDGID_NOMAP (1U << 15) #define NFS_CAP_STATEID_NFSV41 (1U << 16) #define NFS_CAP_ATOMIC_OPEN_V1 (1U << 17) #define NFS_CAP_SECURITY_LABEL (1U << 18) #define NFS_CAP_SEEK (1U << 19) #define NFS_CAP_ALLOCATE (1U << 20) #define NFS_CAP_DEALLOCATE (1U << 21) #define NFS_CAP_LAYOUTSTATS (1U << 22) #define NFS_CAP_CLONE (1U << 23) #define NFS_CAP_COPY (1U << 24) #endif