| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* |
| * linux/fs/nfs/nfs4_fs.h |
| * |
| * Copyright (C) 2005 Trond Myklebust |
| * |
| * NFSv4-specific filesystem definitions and declarations |
| */ |
| |
| #ifndef __LINUX_FS_NFS_NFS4_FS_H |
| #define __LINUX_FS_NFS_NFS4_FS_H |
| |
| #if defined(CONFIG_NFS_V4_2) |
| #define NFS4_MAX_MINOR_VERSION 2 |
| #elif defined(CONFIG_NFS_V4_1) |
| #define NFS4_MAX_MINOR_VERSION 1 |
| #else |
| #define NFS4_MAX_MINOR_VERSION 0 |
| #endif |
| |
| #if IS_ENABLED(CONFIG_NFS_V4) |
| |
| #define NFS4_MAX_LOOP_ON_RECOVER (10) |
| |
| #include <linux/seqlock.h> |
| |
| struct idmap; |
| |
| enum nfs4_client_state { |
| NFS4CLNT_MANAGER_RUNNING = 0, |
| NFS4CLNT_CHECK_LEASE, |
| NFS4CLNT_LEASE_EXPIRED, |
| NFS4CLNT_RECLAIM_REBOOT, |
| NFS4CLNT_RECLAIM_NOGRACE, |
| NFS4CLNT_DELEGRETURN, |
| NFS4CLNT_SESSION_RESET, |
| NFS4CLNT_LEASE_CONFIRM, |
| NFS4CLNT_SERVER_SCOPE_MISMATCH, |
| NFS4CLNT_PURGE_STATE, |
| NFS4CLNT_BIND_CONN_TO_SESSION, |
| NFS4CLNT_MOVED, |
| NFS4CLNT_LEASE_MOVED, |
| NFS4CLNT_DELEGATION_EXPIRED, |
| NFS4CLNT_RUN_MANAGER, |
| NFS4CLNT_DELEGRETURN_RUNNING, |
| }; |
| |
| #define NFS4_RENEW_TIMEOUT 0x01 |
| #define NFS4_RENEW_DELEGATION_CB 0x02 |
| |
| struct nfs_seqid_counter; |
| struct nfs4_minor_version_ops { |
| u32 minor_version; |
| unsigned init_caps; |
| |
| int (*init_client)(struct nfs_client *); |
| void (*shutdown_client)(struct nfs_client *); |
| bool (*match_stateid)(const nfs4_stateid *, |
| const nfs4_stateid *); |
| int (*find_root_sec)(struct nfs_server *, struct nfs_fh *, |
| struct nfs_fsinfo *); |
| void (*free_lock_state)(struct nfs_server *, |
| struct nfs4_lock_state *); |
| int (*test_and_free_expired)(struct nfs_server *, |
| nfs4_stateid *, const struct cred *); |
| struct nfs_seqid * |
| (*alloc_seqid)(struct nfs_seqid_counter *, gfp_t); |
| void (*session_trunk)(struct rpc_clnt *clnt, |
| struct rpc_xprt *xprt, void *data); |
| const struct rpc_call_ops *call_sync_ops; |
| const struct nfs4_state_recovery_ops *reboot_recovery_ops; |
| const struct nfs4_state_recovery_ops *nograce_recovery_ops; |
| const struct nfs4_state_maintenance_ops *state_renewal_ops; |
| const struct nfs4_mig_recovery_ops *mig_recovery_ops; |
| }; |
| |
| #define NFS_SEQID_CONFIRMED 1 |
| struct nfs_seqid_counter { |
| ktime_t create_time; |
| int owner_id; |
| int flags; |
| u32 counter; |
| spinlock_t lock; /* Protects the list */ |
| struct list_head list; /* Defines sequence of RPC calls */ |
| struct rpc_wait_queue wait; /* RPC call delay queue */ |
| }; |
| |
| struct nfs_seqid { |
| struct nfs_seqid_counter *sequence; |
| struct list_head list; |
| struct rpc_task *task; |
| }; |
| |
| static inline void nfs_confirm_seqid(struct nfs_seqid_counter *seqid, int status) |
| { |
| if (seqid_mutating_err(-status)) |
| seqid->flags |= NFS_SEQID_CONFIRMED; |
| } |
| |
| /* |
| * NFS4 state_owners and lock_owners are simply labels for ordered |
| * sequences of RPC calls. Their sole purpose is to provide once-only |
| * semantics by allowing the server to identify replayed requests. |
| */ |
| struct nfs4_state_owner { |
| struct nfs_server *so_server; |
| struct list_head so_lru; |
| unsigned long so_expires; |
| struct rb_node so_server_node; |
| |
| const struct cred *so_cred; /* Associated cred */ |
| |
| spinlock_t so_lock; |
| atomic_t so_count; |
| unsigned long so_flags; |
| struct list_head so_states; |
| struct nfs_seqid_counter so_seqid; |
| seqcount_t so_reclaim_seqcount; |
| struct mutex so_delegreturn_mutex; |
| }; |
| |
| enum { |
| NFS_OWNER_RECLAIM_REBOOT, |
| NFS_OWNER_RECLAIM_NOGRACE |
| }; |
| |
| #define NFS_LOCK_NEW 0 |
| #define NFS_LOCK_RECLAIM 1 |
| #define NFS_LOCK_EXPIRED 2 |
| |
| /* |
| * struct nfs4_state maintains the client-side state for a given |
| * (state_owner,inode) tuple (OPEN) or state_owner (LOCK). |
| * |
| * OPEN: |
| * In order to know when to OPEN_DOWNGRADE or CLOSE the state on the server, |
| * we need to know how many files are open for reading or writing on a |
| * given inode. This information too is stored here. |
| * |
| * LOCK: one nfs4_state (LOCK) to hold the lock stateid nfs4_state(OPEN) |
| */ |
| |
| struct nfs4_lock_state { |
| struct list_head ls_locks; /* Other lock stateids */ |
| struct nfs4_state * ls_state; /* Pointer to open state */ |
| #define NFS_LOCK_INITIALIZED 0 |
| #define NFS_LOCK_LOST 1 |
| unsigned long ls_flags; |
| struct nfs_seqid_counter ls_seqid; |
| nfs4_stateid ls_stateid; |
| refcount_t ls_count; |
| fl_owner_t ls_owner; |
| }; |
| |
| /* bits for nfs4_state->flags */ |
| enum { |
| LK_STATE_IN_USE, |
| NFS_DELEGATED_STATE, /* Current stateid is delegation */ |
| NFS_OPEN_STATE, /* OPEN stateid is set */ |
| NFS_O_RDONLY_STATE, /* OPEN stateid has read-only state */ |
| NFS_O_WRONLY_STATE, /* OPEN stateid has write-only state */ |
| NFS_O_RDWR_STATE, /* OPEN stateid has read/write state */ |
| NFS_STATE_RECLAIM_REBOOT, /* OPEN stateid server rebooted */ |
| NFS_STATE_RECLAIM_NOGRACE, /* OPEN stateid needs to recover state */ |
| NFS_STATE_POSIX_LOCKS, /* Posix locks are supported */ |
| NFS_STATE_RECOVERY_FAILED, /* OPEN stateid state recovery failed */ |
| NFS_STATE_MAY_NOTIFY_LOCK, /* server may CB_NOTIFY_LOCK */ |
| NFS_STATE_CHANGE_WAIT, /* A state changing operation is outstanding */ |
| #ifdef CONFIG_NFS_V4_2 |
| NFS_CLNT_DST_SSC_COPY_STATE, /* dst server open state on client*/ |
| #endif /* CONFIG_NFS_V4_2 */ |
| }; |
| |
| struct nfs4_state { |
| struct list_head open_states; /* List of states for the same state_owner */ |
| struct list_head inode_states; /* List of states for the same inode */ |
| struct list_head lock_states; /* List of subservient lock stateids */ |
| |
| struct nfs4_state_owner *owner; /* Pointer to the open owner */ |
| struct inode *inode; /* Pointer to the inode */ |
| |
| unsigned long flags; /* Do we hold any locks? */ |
| spinlock_t state_lock; /* Protects the lock_states list */ |
| |
| seqlock_t seqlock; /* Protects the stateid/open_stateid */ |
| nfs4_stateid stateid; /* Current stateid: may be delegation */ |
| nfs4_stateid open_stateid; /* OPEN stateid */ |
| |
| /* The following 3 fields are protected by owner->so_lock */ |
| unsigned int n_rdonly; /* Number of read-only references */ |
| unsigned int n_wronly; /* Number of write-only references */ |
| unsigned int n_rdwr; /* Number of read/write references */ |
| fmode_t state; /* State on the server (R,W, or RW) */ |
| refcount_t count; |
| |
| wait_queue_head_t waitq; |
| struct rcu_head rcu_head; |
| }; |
| |
| |
| struct nfs4_exception { |
| struct nfs4_state *state; |
| struct inode *inode; |
| nfs4_stateid *stateid; |
| long timeout; |
| unsigned char task_is_privileged : 1; |
| unsigned char delay : 1, |
| recovering : 1, |
| retry : 1; |
| bool interruptible; |
| }; |
| |
| struct nfs4_state_recovery_ops { |
| int owner_flag_bit; |
| int state_flag_bit; |
| int (*recover_open)(struct nfs4_state_owner *, struct nfs4_state *); |
| int (*recover_lock)(struct nfs4_state *, struct file_lock *); |
| int (*establish_clid)(struct nfs_client *, const struct cred *); |
| int (*reclaim_complete)(struct nfs_client *, const struct cred *); |
| int (*detect_trunking)(struct nfs_client *, struct nfs_client **, |
| const struct cred *); |
| }; |
| |
| struct nfs4_opendata { |
| struct kref kref; |
| struct nfs_openargs o_arg; |
| struct nfs_openres o_res; |
| struct nfs_open_confirmargs c_arg; |
| struct nfs_open_confirmres c_res; |
| struct nfs4_string owner_name; |
| struct nfs4_string group_name; |
| struct nfs4_label *a_label; |
| struct nfs_fattr f_attr; |
| struct nfs4_label *f_label; |
| struct dentry *dir; |
| struct dentry *dentry; |
| struct nfs4_state_owner *owner; |
| struct nfs4_state *state; |
| struct iattr attrs; |
| struct nfs4_layoutget *lgp; |
| unsigned long timestamp; |
| bool rpc_done; |
| bool file_created; |
| bool is_recover; |
| bool cancelled; |
| int rpc_status; |
| }; |
| |
| struct nfs4_add_xprt_data { |
| struct nfs_client *clp; |
| const struct cred *cred; |
| }; |
| |
| struct nfs4_state_maintenance_ops { |
| int (*sched_state_renewal)(struct nfs_client *, const struct cred *, unsigned); |
| const struct cred * (*get_state_renewal_cred)(struct nfs_client *); |
| int (*renew_lease)(struct nfs_client *, const struct cred *); |
| }; |
| |
| struct nfs4_mig_recovery_ops { |
| int (*get_locations)(struct inode *, struct nfs4_fs_locations *, |
| struct page *, const struct cred *); |
| int (*fsid_present)(struct inode *, const struct cred *); |
| }; |
| |
| extern const struct dentry_operations nfs4_dentry_operations; |
| |
| /* dir.c */ |
| int nfs_atomic_open(struct inode *, struct dentry *, struct file *, |
| unsigned, umode_t); |
| |
| /* super.c */ |
| extern struct file_system_type nfs4_fs_type; |
| |
| /* nfs4namespace.c */ |
| struct rpc_clnt *nfs4_negotiate_security(struct rpc_clnt *, struct inode *, |
| const struct qstr *); |
| struct vfsmount *nfs4_submount(struct nfs_server *, struct dentry *, |
| struct nfs_fh *, struct nfs_fattr *); |
| int nfs4_replace_transport(struct nfs_server *server, |
| const struct nfs4_fs_locations *locations); |
| size_t nfs_parse_server_name(char *string, size_t len, struct sockaddr *sa, |
| size_t salen, struct net *net); |
| /* nfs4proc.c */ |
| extern int nfs4_handle_exception(struct nfs_server *, int, struct nfs4_exception *); |
| extern int nfs4_async_handle_error(struct rpc_task *task, |
| struct nfs_server *server, |
| struct nfs4_state *state, long *timeout); |
| extern int nfs4_call_sync(struct rpc_clnt *, struct nfs_server *, |
| struct rpc_message *, struct nfs4_sequence_args *, |
| struct nfs4_sequence_res *, int); |
| extern void nfs4_init_sequence(struct nfs4_sequence_args *, struct nfs4_sequence_res *, int, int); |
| extern int nfs4_proc_setclientid(struct nfs_client *, u32, unsigned short, const struct cred *, struct nfs4_setclientid_res *); |
| extern int nfs4_proc_setclientid_confirm(struct nfs_client *, struct nfs4_setclientid_res *arg, const struct cred *); |
| extern int nfs4_proc_get_rootfh(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *, bool); |
| extern int nfs4_proc_bind_conn_to_session(struct nfs_client *, const struct cred *cred); |
| extern int nfs4_proc_exchange_id(struct nfs_client *clp, const struct cred *cred); |
| extern int nfs4_destroy_clientid(struct nfs_client *clp); |
| extern int nfs4_init_clientid(struct nfs_client *, const struct cred *); |
| extern int nfs41_init_clientid(struct nfs_client *, const struct cred *); |
| extern int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait); |
| extern int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle); |
| extern int nfs4_proc_fs_locations(struct rpc_clnt *, struct inode *, const struct qstr *, |
| struct nfs4_fs_locations *, struct page *); |
| extern int nfs4_proc_get_locations(struct inode *, struct nfs4_fs_locations *, |
| struct page *page, const struct cred *); |
| extern int nfs4_proc_fsid_present(struct inode *, const struct cred *); |
| extern struct rpc_clnt *nfs4_proc_lookup_mountpoint(struct inode *, const struct qstr *, |
| struct nfs_fh *, struct nfs_fattr *); |
| extern int nfs4_proc_secinfo(struct inode *, const struct qstr *, struct nfs4_secinfo_flavors *); |
| extern const struct xattr_handler *nfs4_xattr_handlers[]; |
| extern int nfs4_set_rw_stateid(nfs4_stateid *stateid, |
| const struct nfs_open_context *ctx, |
| const struct nfs_lock_context *l_ctx, |
| fmode_t fmode); |
| |
| extern int nfs4_proc_get_lease_time(struct nfs_client *clp, |
| struct nfs_fsinfo *fsinfo); |
| #if defined(CONFIG_NFS_V4_1) |
| extern int nfs41_sequence_done(struct rpc_task *, struct nfs4_sequence_res *); |
| extern int nfs4_proc_create_session(struct nfs_client *, const struct cred *); |
| extern int nfs4_proc_destroy_session(struct nfs4_session *, const struct cred *); |
| extern int nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, |
| bool sync); |
| extern int nfs4_detect_session_trunking(struct nfs_client *clp, |
| struct nfs41_exchange_id_res *res, struct rpc_xprt *xprt); |
| |
| static inline bool |
| is_ds_only_client(struct nfs_client *clp) |
| { |
| return (clp->cl_exchange_flags & EXCHGID4_FLAG_MASK_PNFS) == |
| EXCHGID4_FLAG_USE_PNFS_DS; |
| } |
| |
| static inline bool |
| is_ds_client(struct nfs_client *clp) |
| { |
| return clp->cl_exchange_flags & EXCHGID4_FLAG_USE_PNFS_DS; |
| } |
| |
| static inline bool |
| _nfs4_state_protect(struct nfs_client *clp, unsigned long sp4_mode, |
| struct rpc_clnt **clntp, struct rpc_message *msg) |
| { |
| rpc_authflavor_t flavor; |
| |
| if (sp4_mode == NFS_SP4_MACH_CRED_CLEANUP || |
| sp4_mode == NFS_SP4_MACH_CRED_PNFS_CLEANUP) { |
| /* Using machine creds for cleanup operations |
| * is only relevent if the client credentials |
| * might expire. So don't bother for |
| * RPC_AUTH_UNIX. If file was only exported to |
| * sec=sys, the PUTFH would fail anyway. |
| */ |
| if ((*clntp)->cl_auth->au_flavor == RPC_AUTH_UNIX) |
| return false; |
| } |
| if (test_bit(sp4_mode, &clp->cl_sp4_flags)) { |
| msg->rpc_cred = rpc_machine_cred(); |
| |
| flavor = clp->cl_rpcclient->cl_auth->au_flavor; |
| WARN_ON_ONCE(flavor != RPC_AUTH_GSS_KRB5I && |
| flavor != RPC_AUTH_GSS_KRB5P); |
| *clntp = clp->cl_rpcclient; |
| |
| return true; |
| } |
| return false; |
| } |
| |
| /* |
| * Function responsible for determining if an rpc_message should use the |
| * machine cred under SP4_MACH_CRED and if so switching the credential and |
| * authflavor (using the nfs_client's rpc_clnt which will be krb5i/p). |
| * Should be called before rpc_call_sync/rpc_call_async. |
| */ |
| static inline void |
| nfs4_state_protect(struct nfs_client *clp, unsigned long sp4_mode, |
| struct rpc_clnt **clntp, struct rpc_message *msg) |
| { |
| _nfs4_state_protect(clp, sp4_mode, clntp, msg); |
| } |
| |
| /* |
| * Special wrapper to nfs4_state_protect for write. |
| * If WRITE can use machine cred but COMMIT cannot, make sure all writes |
| * that use machine cred use NFS_FILE_SYNC. |
| */ |
| static inline void |
| nfs4_state_protect_write(struct nfs_client *clp, struct rpc_clnt **clntp, |
| struct rpc_message *msg, struct nfs_pgio_header *hdr) |
| { |
| if (_nfs4_state_protect(clp, NFS_SP4_MACH_CRED_WRITE, clntp, msg) && |
| !test_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags)) |
| hdr->args.stable = NFS_FILE_SYNC; |
| } |
| #else /* CONFIG_NFS_v4_1 */ |
| static inline bool |
| is_ds_only_client(struct nfs_client *clp) |
| { |
| return false; |
| } |
| |
| static inline bool |
| is_ds_client(struct nfs_client *clp) |
| { |
| return false; |
| } |
| |
| static inline void |
| nfs4_state_protect(struct nfs_client *clp, unsigned long sp4_flags, |
| struct rpc_clnt **clntp, struct rpc_message *msg) |
| { |
| } |
| |
| static inline void |
| nfs4_state_protect_write(struct nfs_client *clp, struct rpc_clnt **clntp, |
| struct rpc_message *msg, struct nfs_pgio_header *hdr) |
| { |
| } |
| #endif /* CONFIG_NFS_V4_1 */ |
| |
| extern const struct nfs4_minor_version_ops *nfs_v4_minor_ops[]; |
| |
| extern const u32 nfs4_fattr_bitmap[3]; |
| extern const u32 nfs4_statfs_bitmap[3]; |
| extern const u32 nfs4_pathconf_bitmap[3]; |
| extern const u32 nfs4_fsinfo_bitmap[3]; |
| extern const u32 nfs4_fs_locations_bitmap[3]; |
| |
| void nfs40_shutdown_client(struct nfs_client *); |
| void nfs41_shutdown_client(struct nfs_client *); |
| int nfs40_init_client(struct nfs_client *); |
| int nfs41_init_client(struct nfs_client *); |
| void nfs4_free_client(struct nfs_client *); |
| |
| struct nfs_client *nfs4_alloc_client(const struct nfs_client_initdata *); |
| |
| /* nfs4renewd.c */ |
| extern void nfs4_schedule_state_renewal(struct nfs_client *); |
| extern void nfs4_renewd_prepare_shutdown(struct nfs_server *); |
| extern void nfs4_kill_renewd(struct nfs_client *); |
| extern void nfs4_renew_state(struct work_struct *); |
| extern void nfs4_set_lease_period(struct nfs_client *clp, unsigned long lease); |
| |
| |
| /* nfs4state.c */ |
| const struct cred *nfs4_get_clid_cred(struct nfs_client *clp); |
| const struct cred *nfs4_get_machine_cred(struct nfs_client *clp); |
| const struct cred *nfs4_get_renew_cred(struct nfs_client *clp); |
| int nfs4_discover_server_trunking(struct nfs_client *clp, |
| struct nfs_client **); |
| int nfs40_discover_server_trunking(struct nfs_client *clp, |
| struct nfs_client **, const struct cred *); |
| #if defined(CONFIG_NFS_V4_1) |
| int nfs41_discover_server_trunking(struct nfs_client *clp, |
| struct nfs_client **, const struct cred *); |
| extern void nfs4_schedule_session_recovery(struct nfs4_session *, int); |
| extern void nfs41_notify_server(struct nfs_client *); |
| #else |
| static inline void nfs4_schedule_session_recovery(struct nfs4_session *session, int err) |
| { |
| } |
| #endif /* CONFIG_NFS_V4_1 */ |
| |
| extern struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *, const struct cred *, gfp_t); |
| extern void nfs4_put_state_owner(struct nfs4_state_owner *); |
| extern void nfs4_purge_state_owners(struct nfs_server *, struct list_head *); |
| extern void nfs4_free_state_owners(struct list_head *head); |
| extern struct nfs4_state * nfs4_get_open_state(struct inode *, struct nfs4_state_owner *); |
| extern void nfs4_put_open_state(struct nfs4_state *); |
| extern void nfs4_close_state(struct nfs4_state *, fmode_t); |
| extern void nfs4_close_sync(struct nfs4_state *, fmode_t); |
| extern void nfs4_state_set_mode_locked(struct nfs4_state *, fmode_t); |
| extern void nfs_inode_find_state_and_recover(struct inode *inode, |
| const nfs4_stateid *stateid); |
| extern int nfs4_state_mark_reclaim_nograce(struct nfs_client *, struct nfs4_state *); |
| extern void nfs4_schedule_lease_recovery(struct nfs_client *); |
| extern int nfs4_wait_clnt_recover(struct nfs_client *clp); |
| extern int nfs4_client_recover_expired_lease(struct nfs_client *clp); |
| extern void nfs4_schedule_state_manager(struct nfs_client *); |
| extern void nfs4_schedule_path_down_recovery(struct nfs_client *clp); |
| extern int nfs4_schedule_stateid_recovery(const struct nfs_server *, struct nfs4_state *); |
| extern int nfs4_schedule_migration_recovery(const struct nfs_server *); |
| extern void nfs4_schedule_lease_moved_recovery(struct nfs_client *); |
| extern void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags, bool); |
| extern void nfs41_handle_server_scope(struct nfs_client *, |
| struct nfs41_server_scope **); |
| extern void nfs4_put_lock_state(struct nfs4_lock_state *lsp); |
| extern int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl); |
| extern int nfs4_select_rw_stateid(struct nfs4_state *, fmode_t, |
| const struct nfs_lock_context *, nfs4_stateid *, |
| const struct cred **); |
| extern bool nfs4_copy_open_stateid(nfs4_stateid *dst, |
| struct nfs4_state *state); |
| |
| extern struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter, gfp_t gfp_mask); |
| extern int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task); |
| extern void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid); |
| extern void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid); |
| extern void nfs_release_seqid(struct nfs_seqid *seqid); |
| extern void nfs_free_seqid(struct nfs_seqid *seqid); |
| extern int nfs4_setup_sequence(struct nfs_client *client, |
| struct nfs4_sequence_args *args, |
| struct nfs4_sequence_res *res, |
| struct rpc_task *task); |
| extern int nfs4_sequence_done(struct rpc_task *task, |
| struct nfs4_sequence_res *res); |
| |
| extern void nfs4_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp); |
| extern int nfs4_proc_commit(struct file *dst, __u64 offset, __u32 count, struct nfs_commitres *res); |
| extern const nfs4_stateid zero_stateid; |
| extern const nfs4_stateid invalid_stateid; |
| |
| /* nfs4super.c */ |
| struct nfs_mount_info; |
| extern struct nfs_subversion nfs_v4; |
| struct dentry *nfs4_try_mount(int, const char *, struct nfs_mount_info *, struct nfs_subversion *); |
| extern bool nfs4_disable_idmapping; |
| extern unsigned short max_session_slots; |
| extern unsigned short max_session_cb_slots; |
| extern unsigned short send_implementation_id; |
| extern bool recover_lost_locks; |
| |
| #define NFS4_CLIENT_ID_UNIQ_LEN (64) |
| extern char nfs4_client_id_uniquifier[NFS4_CLIENT_ID_UNIQ_LEN]; |
| |
| /* nfs4sysctl.c */ |
| #ifdef CONFIG_SYSCTL |
| int nfs4_register_sysctl(void); |
| void nfs4_unregister_sysctl(void); |
| #else |
| static inline int nfs4_register_sysctl(void) |
| { |
| return 0; |
| } |
| |
| static inline void nfs4_unregister_sysctl(void) |
| { |
| } |
| #endif |
| |
| /* nfs4xdr.c */ |
| extern const struct rpc_procinfo nfs4_procedures[]; |
| |
| struct nfs4_mount_data; |
| |
| /* callback_xdr.c */ |
| extern const struct svc_version nfs4_callback_version1; |
| extern const struct svc_version nfs4_callback_version4; |
| |
| static inline void nfs4_stateid_copy(nfs4_stateid *dst, const nfs4_stateid *src) |
| { |
| memcpy(dst->data, src->data, sizeof(dst->data)); |
| dst->type = src->type; |
| } |
| |
| static inline bool nfs4_stateid_match(const nfs4_stateid *dst, const nfs4_stateid *src) |
| { |
| if (dst->type != src->type) |
| return false; |
| return memcmp(dst->data, src->data, sizeof(dst->data)) == 0; |
| } |
| |
| static inline bool nfs4_stateid_match_other(const nfs4_stateid *dst, const nfs4_stateid *src) |
| { |
| return memcmp(dst->other, src->other, NFS4_STATEID_OTHER_SIZE) == 0; |
| } |
| |
| static inline bool nfs4_stateid_is_newer(const nfs4_stateid *s1, const nfs4_stateid *s2) |
| { |
| return (s32)(be32_to_cpu(s1->seqid) - be32_to_cpu(s2->seqid)) > 0; |
| } |
| |
| static inline bool nfs4_stateid_is_next(const nfs4_stateid *s1, const nfs4_stateid *s2) |
| { |
| u32 seq1 = be32_to_cpu(s1->seqid); |
| u32 seq2 = be32_to_cpu(s2->seqid); |
| |
| return seq2 == seq1 + 1U || (seq2 == 1U && seq1 == 0xffffffffU); |
| } |
| |
| static inline void nfs4_stateid_seqid_inc(nfs4_stateid *s1) |
| { |
| u32 seqid = be32_to_cpu(s1->seqid); |
| |
| if (++seqid == 0) |
| ++seqid; |
| s1->seqid = cpu_to_be32(seqid); |
| } |
| |
| static inline bool nfs4_valid_open_stateid(const struct nfs4_state *state) |
| { |
| return test_bit(NFS_STATE_RECOVERY_FAILED, &state->flags) == 0; |
| } |
| |
| static inline bool nfs4_state_match_open_stateid_other(const struct nfs4_state *state, |
| const nfs4_stateid *stateid) |
| { |
| return test_bit(NFS_OPEN_STATE, &state->flags) && |
| nfs4_stateid_match_other(&state->open_stateid, stateid); |
| } |
| |
| #else |
| |
| #define nfs4_close_state(a, b) do { } while (0) |
| #define nfs4_close_sync(a, b) do { } while (0) |
| #define nfs4_state_protect(a, b, c, d) do { } while (0) |
| #define nfs4_state_protect_write(a, b, c, d) do { } while (0) |
| |
| #endif /* CONFIG_NFS_V4 */ |
| #endif /* __LINUX_FS_NFS_NFS4_FS.H */ |