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-rw-r--r--fs/nfs/nfs4_fs.h456
1 files changed, 370 insertions, 86 deletions
diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h
index bd1b9d663fb..ba2affa5194 100644
--- a/fs/nfs/nfs4_fs.h
+++ b/fs/nfs/nfs4_fs.h
@@ -9,59 +9,75 @@
#ifndef __LINUX_FS_NFS_NFS4_FS_H
#define __LINUX_FS_NFS_NFS4_FS_H
-#ifdef CONFIG_NFS_V4
+#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
-struct idmap;
+#if IS_ENABLED(CONFIG_NFS_V4)
-/*
- * In a seqid-mutating op, this macro controls which error return
- * values trigger incrementation of the seqid.
- *
- * from rfc 3010:
- * The client MUST monotonically increment the sequence number for the
- * CLOSE, LOCK, LOCKU, OPEN, OPEN_CONFIRM, and OPEN_DOWNGRADE
- * operations. This is true even in the event that the previous
- * operation that used the sequence number received an error. The only
- * exception to this rule is if the previous operation received one of
- * the following errors: NFSERR_STALE_CLIENTID, NFSERR_STALE_STATEID,
- * NFSERR_BAD_STATEID, NFSERR_BAD_SEQID, NFSERR_BADXDR,
- * NFSERR_RESOURCE, NFSERR_NOFILEHANDLE.
- *
- */
-#define seqid_mutating_err(err) \
-(((err) != NFSERR_STALE_CLIENTID) && \
- ((err) != NFSERR_STALE_STATEID) && \
- ((err) != NFSERR_BAD_STATEID) && \
- ((err) != NFSERR_BAD_SEQID) && \
- ((err) != NFSERR_BAD_XDR) && \
- ((err) != NFSERR_RESOURCE) && \
- ((err) != NFSERR_NOFILEHANDLE))
+#define NFS4_MAX_LOOP_ON_RECOVER (10)
+
+#include <linux/seqlock.h>
+
+struct idmap;
enum nfs4_client_state {
- NFS4CLNT_STATE_RECOVER = 0,
+ 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,
};
-/*
- * struct rpc_sequence ensures that RPC calls are sent in the exact
- * order that they appear on the list.
- */
-struct rpc_sequence {
- struct rpc_wait_queue wait; /* RPC call delay queue */
- spinlock_t lock; /* Protects the list */
- struct list_head list; /* Defines sequence of RPC calls */
+#define NFS4_RENEW_TIMEOUT 0x01
+#define NFS4_RENEW_DELEGATION_CB 0x02
+
+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 *);
+ int (*free_lock_state)(struct nfs_server *,
+ struct nfs4_lock_state *);
+ 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 {
- struct rpc_sequence *sequence;
+ 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)
@@ -70,32 +86,37 @@ static inline void nfs_confirm_seqid(struct nfs_seqid_counter *seqid, int status
seqid->flags |= NFS_SEQID_CONFIRMED;
}
-struct nfs_unique_id {
- struct rb_node rb_node;
- __u64 id;
-};
-
/*
* 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_unique_id so_owner_id;
- struct nfs_client *so_client;
struct nfs_server *so_server;
- struct rb_node so_client_node;
+ struct list_head so_lru;
+ unsigned long so_expires;
+ struct rb_node so_server_node;
struct rpc_cred *so_cred; /* Associated cred */
spinlock_t so_lock;
atomic_t so_count;
+ unsigned long so_flags;
struct list_head so_states;
- struct list_head so_delegations;
struct nfs_seqid_counter so_seqid;
- struct rpc_sequence so_sequence;
+ 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).
@@ -108,26 +129,41 @@ struct nfs4_state_owner {
* LOCK: one nfs4_state (LOCK) to hold the lock stateid nfs4_state(OPEN)
*/
+struct nfs4_lock_owner {
+ unsigned int lo_type;
+#define NFS4_ANY_LOCK_TYPE (0U)
+#define NFS4_FLOCK_LOCK_TYPE (1U << 0)
+#define NFS4_POSIX_LOCK_TYPE (1U << 1)
+ union {
+ fl_owner_t posix_owner;
+ pid_t flock_owner;
+ } lo_u;
+};
+
struct nfs4_lock_state {
struct list_head ls_locks; /* Other lock stateids */
struct nfs4_state * ls_state; /* Pointer to open state */
- fl_owner_t ls_owner; /* POSIX lock owner */
-#define NFS_LOCK_INITIALIZED 1
- int ls_flags;
+#define NFS_LOCK_INITIALIZED 0
+#define NFS_LOCK_LOST 1
+ unsigned long ls_flags;
struct nfs_seqid_counter ls_seqid;
- struct rpc_sequence ls_sequence;
- struct nfs_unique_id ls_id;
nfs4_stateid ls_stateid;
atomic_t ls_count;
+ struct nfs4_lock_owner 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 */
};
struct nfs4_state {
@@ -149,7 +185,7 @@ struct nfs4_state {
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 */
- int state; /* State on the server (R,W, or RW) */
+ fmode_t state; /* State on the server (R,W, or RW) */
atomic_t count;
};
@@ -157,43 +193,202 @@ struct nfs4_state {
struct nfs4_exception {
long timeout;
int retry;
+ struct nfs4_state *state;
+ struct inode *inode;
};
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 *, struct rpc_cred *);
+ int (*reclaim_complete)(struct nfs_client *, struct rpc_cred *);
+ int (*detect_trunking)(struct nfs_client *, struct nfs_client **,
+ struct rpc_cred *);
+};
+
+struct nfs4_state_maintenance_ops {
+ int (*sched_state_renewal)(struct nfs_client *, struct rpc_cred *, unsigned);
+ struct rpc_cred * (*get_state_renewal_cred_locked)(struct nfs_client *);
+ int (*renew_lease)(struct nfs_client *, struct rpc_cred *);
};
-extern struct dentry_operations nfs4_dentry_operations;
-extern const struct inode_operations nfs4_dir_inode_operations;
+struct nfs4_mig_recovery_ops {
+ int (*get_locations)(struct inode *, struct nfs4_fs_locations *,
+ struct page *, struct rpc_cred *);
+ int (*fsid_present)(struct inode *, struct rpc_cred *);
+};
+
+extern const struct dentry_operations nfs4_dentry_operations;
+
+/* dir.c */
+int nfs_atomic_open(struct inode *, struct dentry *, struct file *,
+ unsigned, umode_t, int *);
-/* inode.c */
-extern ssize_t nfs4_getxattr(struct dentry *, const char *, void *, size_t);
-extern int nfs4_setxattr(struct dentry *, const char *, const void *, size_t, int);
-extern ssize_t nfs4_listxattr(struct dentry *, char *, size_t);
+/* super.c */
+extern struct file_system_type nfs4_fs_type;
+/* nfs4namespace.c */
+struct rpc_clnt *nfs4_negotiate_security(struct rpc_clnt *, struct inode *, 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);
/* nfs4proc.c */
-extern int nfs4_map_errors(int err);
-extern int nfs4_proc_setclientid(struct nfs_client *, u32, unsigned short, struct rpc_cred *);
-extern int nfs4_proc_setclientid_confirm(struct nfs_client *, struct rpc_cred *);
-extern int nfs4_proc_async_renew(struct nfs_client *, struct rpc_cred *);
-extern int nfs4_proc_renew(struct nfs_client *, struct rpc_cred *);
-extern int nfs4_do_close(struct path *path, struct nfs4_state *state, int wait);
-extern struct dentry *nfs4_atomic_open(struct inode *, struct dentry *, struct nameidata *);
-extern int nfs4_open_revalidate(struct inode *, struct dentry *, int, struct nameidata *);
+extern int nfs4_proc_setclientid(struct nfs_client *, u32, unsigned short, struct rpc_cred *, struct nfs4_setclientid_res *);
+extern int nfs4_proc_setclientid_confirm(struct nfs_client *, struct nfs4_setclientid_res *arg, struct rpc_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 *, struct rpc_cred *cred);
+extern int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred);
+extern int nfs4_destroy_clientid(struct nfs_client *clp);
+extern int nfs4_init_clientid(struct nfs_client *, struct rpc_cred *);
+extern int nfs41_init_clientid(struct nfs_client *, struct rpc_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 inode *dir, const struct qstr *name,
- struct nfs4_fs_locations *fs_locations, struct page *page);
+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, struct rpc_cred *);
+extern int nfs4_proc_fsid_present(struct inode *, struct rpc_cred *);
+extern struct rpc_clnt *nfs4_proc_lookup_mountpoint(struct inode *, 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);
+
+#if defined(CONFIG_NFS_V4_1)
+static inline struct nfs4_session *nfs4_get_session(const struct nfs_server *server)
+{
+ return server->nfs_client->cl_session;
+}
+
+extern int nfs41_setup_sequence(struct nfs4_session *session,
+ struct nfs4_sequence_args *args, struct nfs4_sequence_res *res,
+ struct rpc_task *task);
+extern int nfs41_sequence_done(struct rpc_task *, struct nfs4_sequence_res *);
+extern int nfs4_proc_create_session(struct nfs_client *, struct rpc_cred *);
+extern int nfs4_proc_destroy_session(struct nfs4_session *, struct rpc_cred *);
+extern int nfs4_proc_get_lease_time(struct nfs_client *clp,
+ struct nfs_fsinfo *fsinfo);
+extern int nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data,
+ bool sync);
+
+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)
+{
+ struct rpc_cred *newcred = NULL;
+ rpc_authflavor_t flavor;
+
+ if (test_bit(sp4_mode, &clp->cl_sp4_flags)) {
+ spin_lock(&clp->cl_lock);
+ if (clp->cl_machine_cred != NULL)
+ /* don't call get_rpccred on the machine cred -
+ * a reference will be held for life of clp */
+ newcred = clp->cl_machine_cred;
+ spin_unlock(&clp->cl_lock);
+ msg->rpc_cred = newcred;
+
+ 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_data *wdata)
+{
+ if (_nfs4_state_protect(clp, NFS_SP4_MACH_CRED_WRITE, clntp, msg) &&
+ !test_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags))
+ wdata->args.stable = NFS_FILE_SYNC;
+}
+#else /* CONFIG_NFS_v4_1 */
+static inline struct nfs4_session *nfs4_get_session(const struct nfs_server *server)
+{
+ return NULL;
+}
+
+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;
+}
-extern struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops;
-extern struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops;
+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_data *wdata)
+{
+}
+#endif /* CONFIG_NFS_V4_1 */
+
+extern const struct nfs4_minor_version_ops *nfs_v4_minor_ops[];
-extern const u32 nfs4_fattr_bitmap[2];
-extern const u32 nfs4_statfs_bitmap[2];
-extern const u32 nfs4_pathconf_bitmap[2];
-extern const u32 nfs4_fsinfo_bitmap[2];
-extern const u32 nfs4_fs_locations_bitmap[2];
+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 *);
@@ -202,42 +397,131 @@ extern void nfs4_kill_renewd(struct nfs_client *);
extern void nfs4_renew_state(struct work_struct *);
/* nfs4state.c */
-struct rpc_cred *nfs4_get_renew_cred(struct nfs_client *clp);
+struct rpc_cred *nfs4_get_clid_cred(struct nfs_client *clp);
+struct rpc_cred *nfs4_get_machine_cred_locked(struct nfs_client *clp);
+struct rpc_cred *nfs4_get_renew_cred_locked(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 **, struct rpc_cred *);
+#if defined(CONFIG_NFS_V4_1)
+int nfs41_discover_server_trunking(struct nfs_client *clp,
+ struct nfs_client **, struct rpc_cred *);
+extern void nfs4_schedule_session_recovery(struct nfs4_session *, int);
+extern void nfs41_server_notify_target_slotid_update(struct nfs_client *clp);
+extern void nfs41_server_notify_highest_slotid_update(struct nfs_client *clp);
+
+#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 *, struct rpc_cred *);
+extern struct nfs4_state_owner *nfs4_get_state_owner(struct nfs_server *, struct rpc_cred *, gfp_t);
extern void nfs4_put_state_owner(struct nfs4_state_owner *);
-extern void nfs4_drop_state_owner(struct nfs4_state_owner *);
+extern void nfs4_purge_state_owners(struct nfs_server *);
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 path *, struct nfs4_state *, mode_t);
-extern void nfs4_close_sync(struct path *, struct nfs4_state *, mode_t);
-extern void nfs4_state_set_mode_locked(struct nfs4_state *, mode_t);
-extern void nfs4_schedule_state_recovery(struct nfs_client *);
+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);
+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 void nfs4_copy_stateid(nfs4_stateid *, struct nfs4_state *, fl_owner_t);
+extern int nfs4_select_rw_stateid(nfs4_stateid *, struct nfs4_state *,
+ fmode_t, const struct nfs_lockowner *);
-extern struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter);
+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 void nfs4_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp);
+
extern const nfs4_stateid zero_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 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 __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus);
extern struct rpc_procinfo nfs4_procedures[];
struct nfs4_mount_data;
/* callback_xdr.c */
extern struct svc_version nfs4_callback_version1;
+extern struct svc_version nfs4_callback_version4;
+
+static inline void nfs4_stateid_copy(nfs4_stateid *dst, const nfs4_stateid *src)
+{
+ memcpy(dst, src, sizeof(*dst));
+}
+
+static inline bool nfs4_stateid_match(const nfs4_stateid *dst, const nfs4_stateid *src)
+{
+ return memcmp(dst, src, sizeof(*dst)) == 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_valid_open_stateid(const struct nfs4_state *state)
+{
+ return test_bit(NFS_STATE_RECOVERY_FAILED, &state->flags) == 0;
+}
#else
-#define nfs4_close_state(a, b, c) do { } while (0)
-#define nfs4_close_sync(a, b, c) do { } while (0)
+#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 */
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-10 10:31:07 +0000