Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 954 insertions, 0 deletions

diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
new file mode 100644
index 0000000000..b1fa81c9df
--- /dev/null
+++ b/fs/nfs/internal.h
@@ -0,0 +1,954 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * NFS internal definitions
+ */
+
+#include "nfs4_fs.h"
+#include <linux/fs_context.h>
+#include <linux/security.h>
+#include <linux/crc32.h>
+#include <linux/sunrpc/addr.h>
+#include <linux/nfs_page.h>
+#include <linux/wait_bit.h>
+
+#define NFS_SB_MASK (SB_RDONLY|SB_NOSUID|SB_NODEV|SB_NOEXEC|SB_SYNCHRONOUS)
+
+extern const struct export_operations nfs_export_ops;
+
+struct nfs_string;
+struct nfs_pageio_descriptor;
+
+static inline void nfs_attr_check_mountpoint(struct super_block *parent, struct nfs_fattr *fattr)
+{
+	if (!nfs_fsid_equal(&NFS_SB(parent)->fsid, &fattr->fsid))
+		fattr->valid |= NFS_ATTR_FATTR_MOUNTPOINT;
+}
+
+static inline int nfs_attr_use_mounted_on_fileid(struct nfs_fattr *fattr)
+{
+	if (((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) == 0) ||
+	    (((fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT) == 0) &&
+	     ((fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) == 0)))
+		return 0;
+	return 1;
+}
+
+static inline bool nfs_lookup_is_soft_revalidate(const struct dentry *dentry)
+{
+	if (!(NFS_SB(dentry->d_sb)->flags & NFS_MOUNT_SOFTREVAL))
+		return false;
+	if (!d_is_positive(dentry) || !NFS_FH(d_inode(dentry))->size)
+		return false;
+	return true;
+}
+
+static inline fmode_t flags_to_mode(int flags)
+{
+	fmode_t res = (__force fmode_t)flags & FMODE_EXEC;
+	if ((flags & O_ACCMODE) != O_WRONLY)
+		res |= FMODE_READ;
+	if ((flags & O_ACCMODE) != O_RDONLY)
+		res |= FMODE_WRITE;
+	return res;
+}
+
+/*
+ * Note: RFC 1813 doesn't limit the number of auth flavors that
+ * a server can return, so make something up.
+ */
+#define NFS_MAX_SECFLAVORS	(12)
+
+/*
+ * Value used if the user did not specify a port value.
+ */
+#define NFS_UNSPEC_PORT		(-1)
+
+#define NFS_UNSPEC_RETRANS	(UINT_MAX)
+#define NFS_UNSPEC_TIMEO	(UINT_MAX)
+
+struct nfs_client_initdata {
+	unsigned long init_flags;
+	const char *hostname;			/* Hostname of the server */
+	const struct sockaddr_storage *addr;	/* Address of the server */
+	const char *nodename;			/* Hostname of the client */
+	const char *ip_addr;			/* IP address of the client */
+	size_t addrlen;
+	struct nfs_subversion *nfs_mod;
+	int proto;
+	u32 minorversion;
+	unsigned int nconnect;
+	unsigned int max_connect;
+	struct net *net;
+	const struct rpc_timeout *timeparms;
+	const struct cred *cred;
+	struct xprtsec_parms xprtsec;
+	unsigned long connect_timeout;
+	unsigned long reconnect_timeout;
+};
+
+/*
+ * In-kernel mount arguments
+ */
+struct nfs_fs_context {
+	bool			internal;
+	bool			skip_reconfig_option_check;
+	bool			need_mount;
+	bool			sloppy;
+	unsigned int		flags;		/* NFS{,4}_MOUNT_* flags */
+	unsigned int		rsize, wsize;
+	unsigned int		timeo, retrans;
+	unsigned int		acregmin, acregmax;
+	unsigned int		acdirmin, acdirmax;
+	unsigned int		namlen;
+	unsigned int		options;
+	unsigned int		bsize;
+	struct nfs_auth_info	auth_info;
+	rpc_authflavor_t	selected_flavor;
+	struct xprtsec_parms	xprtsec;
+	char			*client_address;
+	unsigned int		version;
+	unsigned int		minorversion;
+	char			*fscache_uniq;
+	unsigned short		protofamily;
+	unsigned short		mountfamily;
+	bool			has_sec_mnt_opts;
+
+	struct {
+		union {
+			struct sockaddr	address;
+			struct sockaddr_storage	_address;
+		};
+		size_t			addrlen;
+		char			*hostname;
+		u32			version;
+		int			port;
+		unsigned short		protocol;
+	} mount_server;
+
+	struct {
+		union {
+			struct sockaddr	address;
+			struct sockaddr_storage	_address;
+		};
+		size_t			addrlen;
+		char			*hostname;
+		char			*export_path;
+		int			port;
+		unsigned short		protocol;
+		unsigned short		nconnect;
+		unsigned short		max_connect;
+		unsigned short		export_path_len;
+	} nfs_server;
+
+	struct nfs_fh		*mntfh;
+	struct nfs_server	*server;
+	struct nfs_subversion	*nfs_mod;
+
+	/* Information for a cloned mount. */
+	struct nfs_clone_mount {
+		struct super_block	*sb;
+		struct dentry		*dentry;
+		struct nfs_fattr	*fattr;
+		unsigned int		inherited_bsize;
+	} clone_data;
+};
+
+#define nfs_errorf(fc, fmt, ...) ((fc)->log.log ?		\
+	errorf(fc, fmt, ## __VA_ARGS__) :			\
+	({ dprintk(fmt "\n", ## __VA_ARGS__); }))
+
+#define nfs_ferrorf(fc, fac, fmt, ...) ((fc)->log.log ?		\
+	errorf(fc, fmt, ## __VA_ARGS__) :			\
+	({ dfprintk(fac, fmt "\n", ## __VA_ARGS__); }))
+
+#define nfs_invalf(fc, fmt, ...) ((fc)->log.log ?		\
+	invalf(fc, fmt, ## __VA_ARGS__) :			\
+	({ dprintk(fmt "\n", ## __VA_ARGS__);  -EINVAL; }))
+
+#define nfs_finvalf(fc, fac, fmt, ...) ((fc)->log.log ?		\
+	invalf(fc, fmt, ## __VA_ARGS__) :			\
+	({ dfprintk(fac, fmt "\n", ## __VA_ARGS__);  -EINVAL; }))
+
+#define nfs_warnf(fc, fmt, ...) ((fc)->log.log ?		\
+	warnf(fc, fmt, ## __VA_ARGS__) :			\
+	({ dprintk(fmt "\n", ## __VA_ARGS__); }))
+
+#define nfs_fwarnf(fc, fac, fmt, ...) ((fc)->log.log ?		\
+	warnf(fc, fmt, ## __VA_ARGS__) :			\
+	({ dfprintk(fac, fmt "\n", ## __VA_ARGS__); }))
+
+static inline struct nfs_fs_context *nfs_fc2context(const struct fs_context *fc)
+{
+	return fc->fs_private;
+}
+
+/* mount_clnt.c */
+struct nfs_mount_request {
+	struct sockaddr_storage	*sap;
+	size_t			salen;
+	char			*hostname;
+	char			*dirpath;
+	u32			version;
+	unsigned short		protocol;
+	struct nfs_fh		*fh;
+	int			noresvport;
+	unsigned int		*auth_flav_len;
+	rpc_authflavor_t	*auth_flavs;
+	struct net		*net;
+};
+
+extern int nfs_mount(struct nfs_mount_request *info, int timeo, int retrans);
+extern void nfs_umount(const struct nfs_mount_request *info);
+
+/* client.c */
+extern const struct rpc_program nfs_program;
+extern void nfs_clients_init(struct net *net);
+extern void nfs_clients_exit(struct net *net);
+extern struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *);
+int nfs_create_rpc_client(struct nfs_client *, const struct nfs_client_initdata *, rpc_authflavor_t);
+struct nfs_client *nfs_get_client(const struct nfs_client_initdata *);
+int nfs_probe_server(struct nfs_server *, struct nfs_fh *);
+void nfs_server_insert_lists(struct nfs_server *);
+void nfs_server_remove_lists(struct nfs_server *);
+void nfs_init_timeout_values(struct rpc_timeout *to, int proto, int timeo, int retrans);
+int nfs_init_server_rpcclient(struct nfs_server *, const struct rpc_timeout *t,
+		rpc_authflavor_t);
+struct nfs_server *nfs_alloc_server(void);
+void nfs_server_copy_userdata(struct nfs_server *, struct nfs_server *);
+
+extern void nfs_put_client(struct nfs_client *);
+extern void nfs_free_client(struct nfs_client *);
+extern struct nfs_client *nfs4_find_client_ident(struct net *, int);
+extern struct nfs_client *
+nfs4_find_client_sessionid(struct net *, const struct sockaddr *,
+				struct nfs4_sessionid *, u32);
+extern struct nfs_server *nfs_create_server(struct fs_context *);
+extern void nfs4_server_set_init_caps(struct nfs_server *);
+extern struct nfs_server *nfs4_create_server(struct fs_context *);
+extern struct nfs_server *nfs4_create_referral_server(struct fs_context *);
+extern int nfs4_update_server(struct nfs_server *server, const char *hostname,
+					struct sockaddr_storage *sap, size_t salen,
+					struct net *net);
+extern void nfs_free_server(struct nfs_server *server);
+extern struct nfs_server *nfs_clone_server(struct nfs_server *,
+					   struct nfs_fh *,
+					   struct nfs_fattr *,
+					   rpc_authflavor_t);
+extern bool nfs_client_init_is_complete(const struct nfs_client *clp);
+extern int nfs_client_init_status(const struct nfs_client *clp);
+extern int nfs_wait_client_init_complete(const struct nfs_client *clp);
+extern void nfs_mark_client_ready(struct nfs_client *clp, int state);
+extern struct nfs_client *nfs4_set_ds_client(struct nfs_server *mds_srv,
+					     const struct sockaddr_storage *ds_addr,
+					     int ds_addrlen, int ds_proto,
+					     unsigned int ds_timeo,
+					     unsigned int ds_retrans,
+					     u32 minor_version);
+extern struct rpc_clnt *nfs4_find_or_create_ds_client(struct nfs_client *,
+						struct inode *);
+extern struct nfs_client *nfs3_set_ds_client(struct nfs_server *mds_srv,
+			const struct sockaddr_storage *ds_addr, int ds_addrlen,
+			int ds_proto, unsigned int ds_timeo,
+			unsigned int ds_retrans);
+#ifdef CONFIG_PROC_FS
+extern int __init nfs_fs_proc_init(void);
+extern void nfs_fs_proc_exit(void);
+extern int nfs_fs_proc_net_init(struct net *net);
+extern void nfs_fs_proc_net_exit(struct net *net);
+#else
+static inline int nfs_fs_proc_net_init(struct net *net)
+{
+	return 0;
+}
+static inline void nfs_fs_proc_net_exit(struct net *net)
+{
+}
+static inline int nfs_fs_proc_init(void)
+{
+	return 0;
+}
+static inline void nfs_fs_proc_exit(void)
+{
+}
+#endif
+
+/* callback_xdr.c */
+extern const struct svc_version nfs4_callback_version1;
+extern const struct svc_version nfs4_callback_version4;
+
+/* fs_context.c */
+extern struct file_system_type nfs_fs_type;
+
+/* pagelist.c */
+extern int __init nfs_init_nfspagecache(void);
+extern void nfs_destroy_nfspagecache(void);
+extern int __init nfs_init_readpagecache(void);
+extern void nfs_destroy_readpagecache(void);
+extern int __init nfs_init_writepagecache(void);
+extern void nfs_destroy_writepagecache(void);
+
+extern int __init nfs_init_directcache(void);
+extern void nfs_destroy_directcache(void);
+extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc,
+			      struct nfs_pgio_header *hdr,
+			      void (*release)(struct nfs_pgio_header *hdr));
+void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos);
+int nfs_iocounter_wait(struct nfs_lock_context *l_ctx);
+
+extern const struct nfs_pageio_ops nfs_pgio_rw_ops;
+struct nfs_pgio_header *nfs_pgio_header_alloc(const struct nfs_rw_ops *);
+void nfs_pgio_header_free(struct nfs_pgio_header *);
+int nfs_generic_pgio(struct nfs_pageio_descriptor *, struct nfs_pgio_header *);
+int nfs_initiate_pgio(struct rpc_clnt *clnt, struct nfs_pgio_header *hdr,
+		      const struct cred *cred, const struct nfs_rpc_ops *rpc_ops,
+		      const struct rpc_call_ops *call_ops, int how, int flags);
+void nfs_free_request(struct nfs_page *req);
+struct nfs_pgio_mirror *
+nfs_pgio_current_mirror(struct nfs_pageio_descriptor *desc);
+
+static inline bool nfs_match_open_context(const struct nfs_open_context *ctx1,
+		const struct nfs_open_context *ctx2)
+{
+	return cred_fscmp(ctx1->cred, ctx2->cred) == 0 && ctx1->state == ctx2->state;
+}
+
+/* nfs2xdr.c */
+extern const struct rpc_procinfo nfs_procedures[];
+extern int nfs2_decode_dirent(struct xdr_stream *,
+				struct nfs_entry *, bool);
+
+/* nfs3xdr.c */
+extern const struct rpc_procinfo nfs3_procedures[];
+extern int nfs3_decode_dirent(struct xdr_stream *,
+				struct nfs_entry *, bool);
+
+/* nfs4xdr.c */
+#if IS_ENABLED(CONFIG_NFS_V4)
+extern int nfs4_decode_dirent(struct xdr_stream *,
+				struct nfs_entry *, bool);
+#endif
+#ifdef CONFIG_NFS_V4_1
+extern const u32 nfs41_maxread_overhead;
+extern const u32 nfs41_maxwrite_overhead;
+extern const u32 nfs41_maxgetdevinfo_overhead;
+#endif
+
+/* nfs4proc.c */
+#if IS_ENABLED(CONFIG_NFS_V4)
+extern const struct rpc_procinfo nfs4_procedures[];
+#endif
+
+#ifdef CONFIG_NFS_V4_SECURITY_LABEL
+extern struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags);
+static inline struct nfs4_label *
+nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src)
+{
+	if (!dst || !src)
+		return NULL;
+
+	if (src->len > NFS4_MAXLABELLEN)
+		return NULL;
+
+	dst->lfs = src->lfs;
+	dst->pi = src->pi;
+	dst->len = src->len;
+	memcpy(dst->label, src->label, src->len);
+
+	return dst;
+}
+
+static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi)
+{
+	if (nfs_server_capable(&nfsi->vfs_inode, NFS_CAP_SECURITY_LABEL))
+		nfsi->cache_validity |= NFS_INO_INVALID_LABEL;
+}
+#else
+static inline struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { return NULL; }
+static inline void nfs_zap_label_cache_locked(struct nfs_inode *nfsi)
+{
+}
+static inline struct nfs4_label *
+nfs4_label_copy(struct nfs4_label *dst, struct nfs4_label *src)
+{
+	return NULL;
+}
+#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
+
+/* proc.c */
+void nfs_close_context(struct nfs_open_context *ctx, int is_sync);
+extern struct nfs_client *nfs_init_client(struct nfs_client *clp,
+			   const struct nfs_client_initdata *);
+
+/* dir.c */
+extern void nfs_readdir_record_entry_cache_hit(struct inode *dir);
+extern void nfs_readdir_record_entry_cache_miss(struct inode *dir);
+extern unsigned long nfs_access_cache_count(struct shrinker *shrink,
+					    struct shrink_control *sc);
+extern unsigned long nfs_access_cache_scan(struct shrinker *shrink,
+					   struct shrink_control *sc);
+struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int);
+void nfs_d_prune_case_insensitive_aliases(struct inode *inode);
+int nfs_create(struct mnt_idmap *, struct inode *, struct dentry *,
+	       umode_t, bool);
+int nfs_mkdir(struct mnt_idmap *, struct inode *, struct dentry *,
+	      umode_t);
+int nfs_rmdir(struct inode *, struct dentry *);
+int nfs_unlink(struct inode *, struct dentry *);
+int nfs_symlink(struct mnt_idmap *, struct inode *, struct dentry *,
+		const char *);
+int nfs_link(struct dentry *, struct inode *, struct dentry *);
+int nfs_mknod(struct mnt_idmap *, struct inode *, struct dentry *, umode_t,
+	      dev_t);
+int nfs_rename(struct mnt_idmap *, struct inode *, struct dentry *,
+	       struct inode *, struct dentry *, unsigned int);
+
+#ifdef CONFIG_NFS_V4_2
+static inline __u32 nfs_access_xattr_mask(const struct nfs_server *server)
+{
+	if (!(server->caps & NFS_CAP_XATTR))
+		return 0;
+	return NFS4_ACCESS_XAREAD | NFS4_ACCESS_XAWRITE | NFS4_ACCESS_XALIST;
+}
+#else
+static inline __u32 nfs_access_xattr_mask(const struct nfs_server *server)
+{
+	return 0;
+}
+#endif
+
+/* file.c */
+int nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync);
+loff_t nfs_file_llseek(struct file *, loff_t, int);
+ssize_t nfs_file_read(struct kiocb *, struct iov_iter *);
+ssize_t nfs_file_splice_read(struct file *in, loff_t *ppos, struct pipe_inode_info *pipe,
+			     size_t len, unsigned int flags);
+int nfs_file_mmap(struct file *, struct vm_area_struct *);
+ssize_t nfs_file_write(struct kiocb *, struct iov_iter *);
+int nfs_file_release(struct inode *, struct file *);
+int nfs_lock(struct file *, int, struct file_lock *);
+int nfs_flock(struct file *, int, struct file_lock *);
+int nfs_check_flags(int);
+
+/* inode.c */
+extern struct workqueue_struct *nfsiod_workqueue;
+extern struct inode *nfs_alloc_inode(struct super_block *sb);
+extern void nfs_free_inode(struct inode *);
+extern int nfs_write_inode(struct inode *, struct writeback_control *);
+extern int nfs_drop_inode(struct inode *);
+extern void nfs_clear_inode(struct inode *);
+extern void nfs_evict_inode(struct inode *);
+extern void nfs_zap_acl_cache(struct inode *inode);
+extern void nfs_set_cache_invalid(struct inode *inode, unsigned long flags);
+extern bool nfs_check_cache_invalid(struct inode *, unsigned long);
+extern int nfs_wait_bit_killable(struct wait_bit_key *key, int mode);
+
+/* super.c */
+extern const struct super_operations nfs_sops;
+bool nfs_auth_info_match(const struct nfs_auth_info *, rpc_authflavor_t);
+int nfs_try_get_tree(struct fs_context *);
+int nfs_get_tree_common(struct fs_context *);
+void nfs_kill_super(struct super_block *);
+
+extern struct rpc_stat nfs_rpcstat;
+
+extern int __init register_nfs_fs(void);
+extern void __exit unregister_nfs_fs(void);
+extern bool nfs_sb_active(struct super_block *sb);
+extern void nfs_sb_deactive(struct super_block *sb);
+extern int nfs_client_for_each_server(struct nfs_client *clp,
+				      int (*fn)(struct nfs_server *, void *),
+				      void *data);
+#ifdef CONFIG_NFS_FSCACHE
+extern const struct netfs_request_ops nfs_netfs_ops;
+#endif
+
+/* io.c */
+extern void nfs_start_io_read(struct inode *inode);
+extern void nfs_end_io_read(struct inode *inode);
+extern void nfs_start_io_write(struct inode *inode);
+extern void nfs_end_io_write(struct inode *inode);
+extern void nfs_start_io_direct(struct inode *inode);
+extern void nfs_end_io_direct(struct inode *inode);
+
+static inline bool nfs_file_io_is_buffered(struct nfs_inode *nfsi)
+{
+	return test_bit(NFS_INO_ODIRECT, &nfsi->flags) == 0;
+}
+
+/* namespace.c */
+#define NFS_PATH_CANONICAL 1
+extern char *nfs_path(char **p, struct dentry *dentry,
+		      char *buffer, ssize_t buflen, unsigned flags);
+extern struct vfsmount *nfs_d_automount(struct path *path);
+int nfs_submount(struct fs_context *, struct nfs_server *);
+int nfs_do_submount(struct fs_context *);
+
+/* getroot.c */
+extern int nfs_get_root(struct super_block *s, struct fs_context *fc);
+#if IS_ENABLED(CONFIG_NFS_V4)
+extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh, bool);
+#endif
+
+struct nfs_pgio_completion_ops;
+/* read.c */
+extern const struct nfs_pgio_completion_ops nfs_async_read_completion_ops;
+extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio,
+			struct inode *inode, bool force_mds,
+			const struct nfs_pgio_completion_ops *compl_ops);
+extern bool nfs_read_alloc_scratch(struct nfs_pgio_header *hdr, size_t size);
+extern int nfs_read_add_folio(struct nfs_pageio_descriptor *pgio,
+			       struct nfs_open_context *ctx,
+			       struct folio *folio);
+extern void nfs_pageio_complete_read(struct nfs_pageio_descriptor *pgio);
+extern void nfs_read_prepare(struct rpc_task *task, void *calldata);
+extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio);
+
+/* super.c */
+void nfs_umount_begin(struct super_block *);
+int  nfs_statfs(struct dentry *, struct kstatfs *);
+int  nfs_show_options(struct seq_file *, struct dentry *);
+int  nfs_show_devname(struct seq_file *, struct dentry *);
+int  nfs_show_path(struct seq_file *, struct dentry *);
+int  nfs_show_stats(struct seq_file *, struct dentry *);
+int  nfs_reconfigure(struct fs_context *);
+
+/* write.c */
+extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio,
+			struct inode *inode, int ioflags, bool force_mds,
+			const struct nfs_pgio_completion_ops *compl_ops);
+extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio);
+extern void nfs_commit_free(struct nfs_commit_data *p);
+extern void nfs_commit_prepare(struct rpc_task *task, void *calldata);
+extern int nfs_initiate_commit(struct rpc_clnt *clnt,
+			       struct nfs_commit_data *data,
+			       const struct nfs_rpc_ops *nfs_ops,
+			       const struct rpc_call_ops *call_ops,
+			       int how, int flags);
+extern void nfs_init_commit(struct nfs_commit_data *data,
+			    struct list_head *head,
+			    struct pnfs_layout_segment *lseg,
+			    struct nfs_commit_info *cinfo);
+int nfs_scan_commit_list(struct list_head *src, struct list_head *dst,
+			 struct nfs_commit_info *cinfo, int max);
+unsigned long nfs_reqs_to_commit(struct nfs_commit_info *);
+int nfs_scan_commit(struct inode *inode, struct list_head *dst,
+		    struct nfs_commit_info *cinfo);
+void nfs_mark_request_commit(struct nfs_page *req,
+			     struct pnfs_layout_segment *lseg,
+			     struct nfs_commit_info *cinfo,
+			     u32 ds_commit_idx);
+int nfs_write_need_commit(struct nfs_pgio_header *);
+void nfs_writeback_update_inode(struct nfs_pgio_header *hdr);
+int nfs_generic_commit_list(struct inode *inode, struct list_head *head,
+			    int how, struct nfs_commit_info *cinfo);
+void nfs_retry_commit(struct list_head *page_list,
+		      struct pnfs_layout_segment *lseg,
+		      struct nfs_commit_info *cinfo,
+		      u32 ds_commit_idx);
+void nfs_commitdata_release(struct nfs_commit_data *data);
+void nfs_request_add_commit_list(struct nfs_page *req,
+				 struct nfs_commit_info *cinfo);
+void nfs_request_add_commit_list_locked(struct nfs_page *req,
+		struct list_head *dst,
+		struct nfs_commit_info *cinfo);
+void nfs_request_remove_commit_list(struct nfs_page *req,
+				    struct nfs_commit_info *cinfo);
+void nfs_init_cinfo(struct nfs_commit_info *cinfo,
+		    struct inode *inode,
+		    struct nfs_direct_req *dreq);
+int nfs_key_timeout_notify(struct file *filp, struct inode *inode);
+bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx, struct inode *inode);
+void nfs_pageio_stop_mirroring(struct nfs_pageio_descriptor *pgio);
+
+int nfs_filemap_write_and_wait_range(struct address_space *mapping,
+		loff_t lstart, loff_t lend);
+
+#ifdef CONFIG_NFS_V4_1
+static inline void
+pnfs_bucket_clear_pnfs_ds_commit_verifiers(struct pnfs_commit_bucket *buckets,
+		unsigned int nbuckets)
+{
+	unsigned int i;
+
+	for (i = 0; i < nbuckets; i++)
+		buckets[i].direct_verf.committed = NFS_INVALID_STABLE_HOW;
+}
+static inline
+void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo)
+{
+	struct pnfs_commit_array *array;
+
+	rcu_read_lock();
+	list_for_each_entry_rcu(array, &cinfo->commits, cinfo_list)
+		pnfs_bucket_clear_pnfs_ds_commit_verifiers(array->buckets,
+				array->nbuckets);
+	rcu_read_unlock();
+}
+#else
+static inline
+void nfs_clear_pnfs_ds_commit_verifiers(struct pnfs_ds_commit_info *cinfo)
+{
+}
+#endif
+
+#ifdef CONFIG_MIGRATION
+int nfs_migrate_folio(struct address_space *, struct folio *dst,
+		struct folio *src, enum migrate_mode);
+#else
+#define nfs_migrate_folio NULL
+#endif
+
+static inline int
+nfs_write_verifier_cmp(const struct nfs_write_verifier *v1,
+		const struct nfs_write_verifier *v2)
+{
+	return memcmp(v1->data, v2->data, sizeof(v1->data));
+}
+
+static inline bool
+nfs_write_match_verf(const struct nfs_writeverf *verf,
+		struct nfs_page *req)
+{
+	return verf->committed > NFS_UNSTABLE &&
+		!nfs_write_verifier_cmp(&req->wb_verf, &verf->verifier);
+}
+
+static inline gfp_t nfs_io_gfp_mask(void)
+{
+	if (current->flags & PF_WQ_WORKER)
+		return GFP_KERNEL | __GFP_NORETRY | __GFP_NOWARN;
+	return GFP_KERNEL;
+}
+
+/*
+ * Special version of should_remove_suid() that ignores capabilities.
+ */
+static inline int nfs_should_remove_suid(const struct inode *inode)
+{
+	umode_t mode = inode->i_mode;
+	int kill = 0;
+
+	/* suid always must be killed */
+	if (unlikely(mode & S_ISUID))
+		kill = ATTR_KILL_SUID;
+
+	/*
+	 * sgid without any exec bits is just a mandatory locking mark; leave
+	 * it alone.  If some exec bits are set, it's a real sgid; kill it.
+	 */
+	if (unlikely((mode & S_ISGID) && (mode & S_IXGRP)))
+		kill |= ATTR_KILL_SGID;
+
+	if (unlikely(kill && S_ISREG(mode)))
+		return kill;
+
+	return 0;
+}
+
+/* unlink.c */
+extern struct rpc_task *
+nfs_async_rename(struct inode *old_dir, struct inode *new_dir,
+		 struct dentry *old_dentry, struct dentry *new_dentry,
+		 void (*complete)(struct rpc_task *, struct nfs_renamedata *));
+extern int nfs_sillyrename(struct inode *dir, struct dentry *dentry);
+
+/* direct.c */
+void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo,
+			      struct nfs_direct_req *dreq);
+extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq, loff_t offset);
+
+/* nfs4proc.c */
+extern struct nfs_client *nfs4_init_client(struct nfs_client *clp,
+			    const struct nfs_client_initdata *);
+extern int nfs40_walk_client_list(struct nfs_client *clp,
+				struct nfs_client **result,
+				const struct cred *cred);
+extern int nfs41_walk_client_list(struct nfs_client *clp,
+				struct nfs_client **result,
+				const struct cred *cred);
+extern void nfs4_test_session_trunk(struct rpc_clnt *clnt,
+				struct rpc_xprt *xprt,
+				void *data);
+
+static inline struct inode *nfs_igrab_and_active(struct inode *inode)
+{
+	struct super_block *sb = inode->i_sb;
+
+	if (sb && nfs_sb_active(sb)) {
+		if (igrab(inode))
+			return inode;
+		nfs_sb_deactive(sb);
+	}
+	return NULL;
+}
+
+static inline void nfs_iput_and_deactive(struct inode *inode)
+{
+	if (inode != NULL) {
+		struct super_block *sb = inode->i_sb;
+
+		iput(inode);
+		nfs_sb_deactive(sb);
+	}
+}
+
+/*
+ * Determine the device name as a string
+ */
+static inline char *nfs_devname(struct dentry *dentry,
+				char *buffer, ssize_t buflen)
+{
+	char *dummy;
+	return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL);
+}
+
+/*
+ * Determine the actual block size (and log2 thereof)
+ */
+static inline
+unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp)
+{
+	/* make sure blocksize is a power of two */
+	if ((bsize & (bsize - 1)) || nrbitsp) {
+		unsigned char	nrbits;
+
+		for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--)
+			;
+		bsize = 1 << nrbits;
+		if (nrbitsp)
+			*nrbitsp = nrbits;
+	}
+
+	return bsize;
+}
+
+/*
+ * Calculate the number of 512byte blocks used.
+ */
+static inline blkcnt_t nfs_calc_block_size(u64 tsize)
+{
+	blkcnt_t used = (tsize + 511) >> 9;
+	return (used > ULONG_MAX) ? ULONG_MAX : used;
+}
+
+/*
+ * Compute and set NFS server blocksize
+ */
+static inline
+unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp)
+{
+	if (bsize < NFS_MIN_FILE_IO_SIZE)
+		bsize = NFS_DEF_FILE_IO_SIZE;
+	else if (bsize >= NFS_MAX_FILE_IO_SIZE)
+		bsize = NFS_MAX_FILE_IO_SIZE;
+
+	return nfs_block_bits(bsize, nrbitsp);
+}
+
+/*
+ * Compute and set NFS server rsize / wsize
+ */
+static inline
+unsigned long nfs_io_size(unsigned long iosize, enum xprt_transports proto)
+{
+	if (iosize < NFS_MIN_FILE_IO_SIZE)
+		iosize = NFS_DEF_FILE_IO_SIZE;
+	else if (iosize >= NFS_MAX_FILE_IO_SIZE)
+		iosize = NFS_MAX_FILE_IO_SIZE;
+
+	if (proto == XPRT_TRANSPORT_UDP || iosize < PAGE_SIZE)
+		return nfs_block_bits(iosize, NULL);
+	return iosize & PAGE_MASK;
+}
+
+/*
+ * Determine the maximum file size for a superblock
+ */
+static inline
+void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize)
+{
+	sb->s_maxbytes = (loff_t)maxfilesize;
+	if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0)
+		sb->s_maxbytes = MAX_LFS_FILESIZE;
+}
+
+/*
+ * Record the page as unstable (an extra writeback period) and mark its
+ * inode as dirty.
+ */
+static inline void nfs_folio_mark_unstable(struct folio *folio,
+					   struct nfs_commit_info *cinfo)
+{
+	if (folio && !cinfo->dreq) {
+		struct inode *inode = folio_file_mapping(folio)->host;
+		long nr = folio_nr_pages(folio);
+
+		/* This page is really still in write-back - just that the
+		 * writeback is happening on the server now.
+		 */
+		node_stat_mod_folio(folio, NR_WRITEBACK, nr);
+		wb_stat_mod(&inode_to_bdi(inode)->wb, WB_WRITEBACK, nr);
+		__mark_inode_dirty(inode, I_DIRTY_DATASYNC);
+	}
+}
+
+/*
+ * Determine the number of bytes of data the page contains
+ */
+static inline
+unsigned int nfs_page_length(struct page *page)
+{
+	loff_t i_size = i_size_read(page_file_mapping(page)->host);
+
+	if (i_size > 0) {
+		pgoff_t index = page_index(page);
+		pgoff_t end_index = (i_size - 1) >> PAGE_SHIFT;
+		if (index < end_index)
+			return PAGE_SIZE;
+		if (index == end_index)
+			return ((i_size - 1) & ~PAGE_MASK) + 1;
+	}
+	return 0;
+}
+
+/*
+ * Determine the number of bytes of data the page contains
+ */
+static inline size_t nfs_folio_length(struct folio *folio)
+{
+	loff_t i_size = i_size_read(folio_file_mapping(folio)->host);
+
+	if (i_size > 0) {
+		pgoff_t index = folio_index(folio) >> folio_order(folio);
+		pgoff_t end_index = (i_size - 1) >> folio_shift(folio);
+		if (index < end_index)
+			return folio_size(folio);
+		if (index == end_index)
+			return offset_in_folio(folio, i_size - 1) + 1;
+	}
+	return 0;
+}
+
+/*
+ * Convert a umode to a dirent->d_type
+ */
+static inline
+unsigned char nfs_umode_to_dtype(umode_t mode)
+{
+	return (mode >> 12) & 15;
+}
+
+/*
+ * Determine the number of pages in an array of length 'len' and
+ * with a base offset of 'base'
+ */
+static inline unsigned int nfs_page_array_len(unsigned int base, size_t len)
+{
+	return ((unsigned long)len + (unsigned long)base + PAGE_SIZE - 1) >>
+	       PAGE_SHIFT;
+}
+
+/*
+ * Convert a struct timespec64 into a 64-bit change attribute
+ *
+ * This does approximately the same thing as timespec64_to_ns(),
+ * but for calculation efficiency, we multiply the seconds by
+ * 1024*1024*1024.
+ */
+static inline
+u64 nfs_timespec_to_change_attr(const struct timespec64 *ts)
+{
+	return ((u64)ts->tv_sec << 30) + ts->tv_nsec;
+}
+
+#ifdef CONFIG_CRC32
+static inline u32 nfs_stateid_hash(const nfs4_stateid *stateid)
+{
+	return ~crc32_le(0xFFFFFFFF, &stateid->other[0],
+				NFS4_STATEID_OTHER_SIZE);
+}
+#else
+static inline u32 nfs_stateid_hash(nfs4_stateid *stateid)
+{
+	return 0;
+}
+#endif
+
+static inline bool nfs_error_is_fatal(int err)
+{
+	switch (err) {
+	case -ERESTARTSYS:
+	case -EINTR:
+	case -EACCES:
+	case -EDQUOT:
+	case -EFBIG:
+	case -EIO:
+	case -ENOSPC:
+	case -EROFS:
+	case -ESTALE:
+	case -E2BIG:
+	case -ENOMEM:
+	case -ETIMEDOUT:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static inline bool nfs_error_is_fatal_on_server(int err)
+{
+	switch (err) {
+	case 0:
+	case -ERESTARTSYS:
+	case -EINTR:
+	case -ENOMEM:
+		return false;
+	}
+	return nfs_error_is_fatal(err);
+}
+
+/*
+ * Select between a default port value and a user-specified port value.
+ * If a zero value is set, then autobind will be used.
+ */
+static inline void nfs_set_port(struct sockaddr_storage *sap, int *port,
+				const unsigned short default_port)
+{
+	if (*port == NFS_UNSPEC_PORT)
+		*port = default_port;
+
+	rpc_set_port((struct sockaddr *)sap, *port);
+}
+
+struct nfs_direct_req {
+	struct kref		kref;		/* release manager */
+
+	/* I/O parameters */
+	struct nfs_open_context	*ctx;		/* file open context info */
+	struct nfs_lock_context *l_ctx;		/* Lock context info */
+	struct kiocb *		iocb;		/* controlling i/o request */
+	struct inode *		inode;		/* target file of i/o */
+
+	/* completion state */
+	atomic_t		io_count;	/* i/os we're waiting for */
+	spinlock_t		lock;		/* protect completion state */
+
+	loff_t			io_start;	/* Start offset for I/O */
+	ssize_t			count,		/* bytes actually processed */
+				max_count,	/* max expected count */
+				bytes_left,	/* bytes left to be sent */
+				error;		/* any reported error */
+	struct completion	completion;	/* wait for i/o completion */
+
+	/* commit state */
+	struct nfs_mds_commit_info mds_cinfo;	/* Storage for cinfo */
+	struct pnfs_ds_commit_info ds_cinfo;	/* Storage for cinfo */
+	struct work_struct	work;
+	int			flags;
+	/* for write */
+#define NFS_ODIRECT_DO_COMMIT		(1)	/* an unstable reply was received */
+#define NFS_ODIRECT_RESCHED_WRITES	(2)	/* write verification failed */
+	/* for read */
+#define NFS_ODIRECT_SHOULD_DIRTY	(3)	/* dirty user-space page after read */
+#define NFS_ODIRECT_DONE		INT_MAX	/* write verification failed */
+};