/* SPDX-License-Identifier: GPL-2.0 */ /* * Hodge-podge collection of knfsd-related stuff. * I will sort this out later. * * Copyright (C) 1995-1997 Olaf Kirch <[email protected]> */ #ifndef LINUX_NFSD_NFSD_H #define LINUX_NFSD_NFSD_H #include <linux/types.h> #include <linux/mount.h> #include <linux/nfs.h> #include <linux/nfs2.h> #include <linux/nfs3.h> #include <linux/nfs4.h> #include <linux/sunrpc/svc.h> #include <linux/sunrpc/svc_xprt.h> #include <linux/sunrpc/msg_prot.h> #include <linux/sunrpc/addr.h> #include <uapi/linux/nfsd/debug.h> #include "netns.h" #include "export.h" #include "stats.h" #undef ifdebug #ifdef CONFIG_SUNRPC_DEBUG #define ifdebug(flag) … #else #define ifdebug … #endif /* * nfsd version */ #define NFSD_SUPPORTED_MINOR_VERSION … /* * Maximum blocksizes supported by daemon under various circumstances. */ #define NFSSVC_MAXBLKSIZE … /* NFSv2 is limited by the protocol specification, see RFC 1094 */ #define NFSSVC_MAXBLKSIZE_V2 … /* * Largest number of bytes we need to allocate for an NFS * call or reply. Used to control buffer sizes. We use * the length of v3 WRITE, READDIR and READDIR replies * which are an RPC header, up to 26 XDR units of reply * data, and some page data. * * Note that accuracy here doesn't matter too much as the * size is rounded up to a page size when allocating space. */ #define NFSD_BUFSIZE … struct readdir_cd { … }; /* Maximum number of operations per session compound */ #define NFSD_MAX_OPS_PER_COMPOUND … struct nfsd_genl_rqstp { … }; extern struct svc_program nfsd_program; extern const struct svc_version nfsd_version2, nfsd_version3, nfsd_version4; extern struct mutex nfsd_mutex; extern spinlock_t nfsd_drc_lock; extern unsigned long nfsd_drc_max_mem; extern unsigned long nfsd_drc_mem_used; extern atomic_t nfsd_th_cnt; /* number of available threads */ extern const struct seq_operations nfs_exports_op; /* * Common void argument and result helpers */ struct nfsd_voidargs { … }; struct nfsd_voidres { … }; bool nfssvc_decode_voidarg(struct svc_rqst *rqstp, struct xdr_stream *xdr); bool nfssvc_encode_voidres(struct svc_rqst *rqstp, struct xdr_stream *xdr); /* * Function prototypes. */ int nfsd_svc(int n, int *nservers, struct net *net, const struct cred *cred, const char *scope); int nfsd_dispatch(struct svc_rqst *rqstp); int nfsd_nrthreads(struct net *); int nfsd_nrpools(struct net *); int nfsd_get_nrthreads(int n, int *, struct net *); int nfsd_set_nrthreads(int n, int *, struct net *); int nfsd_pool_stats_open(struct inode *, struct file *); int nfsd_pool_stats_release(struct inode *, struct file *); void nfsd_shutdown_threads(struct net *net); bool i_am_nfsd(void); struct nfsdfs_client { … }; struct nfsdfs_client *get_nfsdfs_client(struct inode *); struct dentry *nfsd_client_mkdir(struct nfsd_net *nn, struct nfsdfs_client *ncl, u32 id, const struct tree_descr *, struct dentry **fdentries); void nfsd_client_rmdir(struct dentry *dentry); #if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL) #ifdef CONFIG_NFSD_V2_ACL extern const struct svc_version nfsd_acl_version2; #else #define nfsd_acl_version2 … #endif #ifdef CONFIG_NFSD_V3_ACL extern const struct svc_version nfsd_acl_version3; #else #define nfsd_acl_version3 … #endif #endif struct nfsd_net; enum vers_op { … }; int nfsd_vers(struct nfsd_net *nn, int vers, enum vers_op change); int nfsd_minorversion(struct nfsd_net *nn, u32 minorversion, enum vers_op change); void nfsd_reset_versions(struct nfsd_net *nn); int nfsd_create_serv(struct net *net); void nfsd_destroy_serv(struct net *net); extern int nfsd_max_blksize; static inline int nfsd_v4client(struct svc_rqst *rq) { … } static inline struct user_namespace * nfsd_user_namespace(const struct svc_rqst *rqstp) { … } /* * NFSv4 State */ #ifdef CONFIG_NFSD_V4 extern unsigned long max_delegations; int nfsd4_init_slabs(void); void nfsd4_free_slabs(void); int nfs4_state_start(void); int nfs4_state_start_net(struct net *net); void nfs4_state_shutdown(void); void nfs4_state_shutdown_net(struct net *net); int nfs4_reset_recoverydir(char *recdir); char * nfs4_recoverydir(void); bool nfsd4_spo_must_allow(struct svc_rqst *rqstp); int nfsd4_create_laundry_wq(void); void nfsd4_destroy_laundry_wq(void); bool nfsd_wait_for_delegreturn(struct svc_rqst *rqstp, struct inode *inode); #else static inline int nfsd4_init_slabs(void) { return 0; } static inline void nfsd4_free_slabs(void) { } static inline int nfs4_state_start(void) { return 0; } static inline int nfs4_state_start_net(struct net *net) { return 0; } static inline void nfs4_state_shutdown(void) { } static inline void nfs4_state_shutdown_net(struct net *net) { } static inline int nfs4_reset_recoverydir(char *recdir) { return 0; } static inline char * nfs4_recoverydir(void) {return NULL; } static inline bool nfsd4_spo_must_allow(struct svc_rqst *rqstp) { return false; } static inline int nfsd4_create_laundry_wq(void) { return 0; }; static inline void nfsd4_destroy_laundry_wq(void) {}; static inline bool nfsd_wait_for_delegreturn(struct svc_rqst *rqstp, struct inode *inode) { return false; } #endif /* * lockd binding */ void nfsd_lockd_init(void); void nfsd_lockd_shutdown(void); /* * These macros provide pre-xdr'ed values for faster operation. */ #define nfs_ok … #define nfserr_perm … #define nfserr_noent … #define nfserr_io … #define nfserr_nxio … #define nfserr_eagain … #define nfserr_acces … #define nfserr_exist … #define nfserr_xdev … #define nfserr_nodev … #define nfserr_notdir … #define nfserr_isdir … #define nfserr_inval … #define nfserr_fbig … #define nfserr_nospc … #define nfserr_rofs … #define nfserr_mlink … #define nfserr_nametoolong … #define nfserr_notempty … #define nfserr_dquot … #define nfserr_stale … #define nfserr_remote … #define nfserr_wflush … #define nfserr_badhandle … #define nfserr_notsync … #define nfserr_badcookie … #define nfserr_notsupp … #define nfserr_toosmall … #define nfserr_serverfault … #define nfserr_badtype … #define nfserr_jukebox … #define nfserr_denied … #define nfserr_deadlock … #define nfserr_expired … #define nfserr_bad_cookie … #define nfserr_same … #define nfserr_clid_inuse … #define nfserr_stale_clientid … #define nfserr_resource … #define nfserr_moved … #define nfserr_nofilehandle … #define nfserr_minor_vers_mismatch … #define nfserr_share_denied … #define nfserr_stale_stateid … #define nfserr_old_stateid … #define nfserr_bad_stateid … #define nfserr_bad_seqid … #define nfserr_symlink … #define nfserr_not_same … #define nfserr_lock_range … #define nfserr_restorefh … #define nfserr_attrnotsupp … #define nfserr_bad_xdr … #define nfserr_openmode … #define nfserr_badowner … #define nfserr_locks_held … #define nfserr_op_illegal … #define nfserr_grace … #define nfserr_no_grace … #define nfserr_reclaim_bad … #define nfserr_badname … #define nfserr_admin_revoked … #define nfserr_cb_path_down … #define nfserr_locked … #define nfserr_wrongsec … #define nfserr_badiomode … #define nfserr_badlayout … #define nfserr_bad_session_digest … #define nfserr_badsession … #define nfserr_badslot … #define nfserr_complete_already … #define nfserr_conn_not_bound_to_session … #define nfserr_deleg_already_wanted … #define nfserr_back_chan_busy … #define nfserr_layouttrylater … #define nfserr_layoutunavailable … #define nfserr_nomatching_layout … #define nfserr_recallconflict … #define nfserr_unknown_layouttype … #define nfserr_seq_misordered … #define nfserr_sequence_pos … #define nfserr_req_too_big … #define nfserr_rep_too_big … #define nfserr_rep_too_big_to_cache … #define nfserr_retry_uncached_rep … #define nfserr_unsafe_compound … #define nfserr_too_many_ops … #define nfserr_op_not_in_session … #define nfserr_hash_alg_unsupp … #define nfserr_clientid_busy … #define nfserr_pnfs_io_hole … #define nfserr_seq_false_retry … #define nfserr_bad_high_slot … #define nfserr_deadsession … #define nfserr_encr_alg_unsupp … #define nfserr_pnfs_no_layout … #define nfserr_not_only_op … #define nfserr_wrong_cred … #define nfserr_wrong_type … #define nfserr_dirdeleg_unavail … #define nfserr_reject_deleg … #define nfserr_returnconflict … #define nfserr_deleg_revoked … #define nfserr_partner_notsupp … #define nfserr_partner_no_auth … #define nfserr_union_notsupp … #define nfserr_offload_denied … #define nfserr_wrong_lfs … #define nfserr_badlabel … #define nfserr_file_open … #define nfserr_xattr2big … #define nfserr_noxattr … /* error codes for internal use */ /* if a request fails due to kmalloc failure, it gets dropped. * Client should resend eventually */ #define nfserr_dropit … /* end-of-file indicator in readdir */ #define nfserr_eof … /* replay detected */ #define nfserr_replay_me … /* nfs41 replay detected */ #define nfserr_replay_cache … /* Check for dir entries '.' and '..' */ #define isdotent(n, l) … #ifdef CONFIG_NFSD_V4 /* before processing a COMPOUND operation, we have to check that there * is enough space in the buffer for XDR encode to succeed. otherwise, * we might process an operation with side effects, and be unable to * tell the client that the operation succeeded. * * COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space * needed to encode an "ordinary" _successful_ operation. (GETATTR, * READ, READDIR, and READLINK have their own buffer checks.) if we * fall below this level, we fail the next operation with NFS4ERR_RESOURCE. * * COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space * needed to encode an operation which has failed with NFS4ERR_RESOURCE. * care is taken to ensure that we never fall below this level for any * reason. */ #define COMPOUND_SLACK_SPACE … #define COMPOUND_ERR_SLACK_SPACE … #define NFSD_LAUNDROMAT_MINTIMEOUT … #define NFSD_COURTESY_CLIENT_TIMEOUT … #define NFSD_CLIENT_MAX_TRIM_PER_RUN … #define NFS4_CLIENTS_PER_GB … #define NFSD_DELEGRETURN_TIMEOUT … #define NFSD_CB_GETATTR_TIMEOUT … /* * The following attributes are currently not supported by the NFSv4 server: * ARCHIVE (deprecated anyway) * HIDDEN (unlikely to be supported any time soon) * MIMETYPE (unlikely to be supported any time soon) * QUOTA_* (will be supported in a forthcoming patch) * SYSTEM (unlikely to be supported any time soon) * TIME_BACKUP (unlikely to be supported any time soon) * TIME_CREATE (unlikely to be supported any time soon) */ #define NFSD4_SUPPORTED_ATTRS_WORD0 … #define NFSD4_SUPPORTED_ATTRS_WORD1 … #define NFSD4_SUPPORTED_ATTRS_WORD2 … /* 4.1 */ #ifdef CONFIG_NFSD_PNFS #define PNFSD_SUPPORTED_ATTRS_WORD1 … #define PNFSD_SUPPORTED_ATTRS_WORD2 … #else #define PNFSD_SUPPORTED_ATTRS_WORD1 … #define PNFSD_SUPPORTED_ATTRS_WORD2 … #endif /* CONFIG_NFSD_PNFS */ #define NFSD4_1_SUPPORTED_ATTRS_WORD0 … #define NFSD4_1_SUPPORTED_ATTRS_WORD1 … #define NFSD4_1_SUPPORTED_ATTRS_WORD2 … /* 4.2 */ #ifdef CONFIG_NFSD_V4_SECURITY_LABEL #define NFSD4_2_SECURITY_ATTRS … #else #define NFSD4_2_SECURITY_ATTRS … #endif #define NFSD4_2_SUPPORTED_ATTRS_WORD2 … extern const u32 nfsd_suppattrs[3][3]; static inline __be32 nfsd4_set_netaddr(struct sockaddr *addr, struct nfs42_netaddr *netaddr) { … } static inline bool bmval_is_subset(const u32 *bm1, const u32 *bm2) { … } static inline bool nfsd_attrs_supported(u32 minorversion, const u32 *bmval) { … } /* These will return ERR_INVAL if specified in GETATTR or READDIR. */ #define NFSD_WRITEONLY_ATTRS_WORD1 … /* * These are the only attrs allowed in CREATE/OPEN/SETATTR. Don't add * a writeable attribute here without also adding code to parse it to * nfsd4_decode_fattr(). */ #define NFSD_WRITEABLE_ATTRS_WORD0 … #define NFSD_WRITEABLE_ATTRS_WORD1 … #ifdef CONFIG_NFSD_V4_SECURITY_LABEL #define MAYBE_FATTR4_WORD2_SECURITY_LABEL … #else #define MAYBE_FATTR4_WORD2_SECURITY_LABEL … #endif #define NFSD_WRITEABLE_ATTRS_WORD2 … #define NFSD_SUPPATTR_EXCLCREAT_WORD0 … /* * we currently store the exclusive create verifier in the v_{a,m}time * attributes so the client can't set these at create time using EXCLUSIVE4_1 */ #define NFSD_SUPPATTR_EXCLCREAT_WORD1 … #define NFSD_SUPPATTR_EXCLCREAT_WORD2 … extern int nfsd4_is_junction(struct dentry *dentry); extern int register_cld_notifier(void); extern void unregister_cld_notifier(void); #ifdef CONFIG_NFSD_V4_2_INTER_SSC extern void nfsd4_ssc_init_umount_work(struct nfsd_net *nn); #endif extern void nfsd4_init_leases_net(struct nfsd_net *nn); #else /* CONFIG_NFSD_V4 */ static inline int nfsd4_is_junction(struct dentry *dentry) { return 0; } static inline void nfsd4_init_leases_net(struct nfsd_net *nn) { }; #define register_cld_notifier … #define unregister_cld_notifier … #endif /* CONFIG_NFSD_V4 */ #endif /* LINUX_NFSD_NFSD_H */
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