xref: /openbmc/linux/fs/nfs/internal.h (revision 0e20162e)
1f7b422b1SDavid Howells /*
2f7b422b1SDavid Howells  * NFS internal definitions
3f7b422b1SDavid Howells  */
4f7b422b1SDavid Howells 
5eedc020eSAndy Adamson #include "nfs4_fs.h"
6f7b422b1SDavid Howells #include <linux/mount.h>
7f9c3a380SEric Paris #include <linux/security.h>
81264a2f0STrond Myklebust #include <linux/crc32.h>
9f7b422b1SDavid Howells 
1008734048SDavid Howells #define NFS_MS_MASK (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_SYNCHRONOUS)
1108734048SDavid Howells 
1254ceac45SDavid Howells struct nfs_string;
1354ceac45SDavid Howells 
1454ceac45SDavid Howells /* Maximum number of readahead requests
1554ceac45SDavid Howells  * FIXME: this should really be a sysctl so that users may tune it to suit
1654ceac45SDavid Howells  *        their needs. People that do NFS over a slow network, might for
1754ceac45SDavid Howells  *        instance want to reduce it to something closer to 1 for improved
1854ceac45SDavid Howells  *        interactive response.
1954ceac45SDavid Howells  */
2054ceac45SDavid Howells #define NFS_MAX_READAHEAD	(RPC_DEF_SLOT_TABLE - 1)
2154ceac45SDavid Howells 
227ebb9315SBryan Schumaker static inline void nfs_attr_check_mountpoint(struct super_block *parent, struct nfs_fattr *fattr)
237ebb9315SBryan Schumaker {
247ebb9315SBryan Schumaker 	if (!nfs_fsid_equal(&NFS_SB(parent)->fsid, &fattr->fsid))
257ebb9315SBryan Schumaker 		fattr->valid |= NFS_ATTR_FATTR_MOUNTPOINT;
267ebb9315SBryan Schumaker }
277ebb9315SBryan Schumaker 
28533eb461SAndy Adamson static inline int nfs_attr_use_mounted_on_fileid(struct nfs_fattr *fattr)
29533eb461SAndy Adamson {
30533eb461SAndy Adamson 	if (((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) == 0) ||
31533eb461SAndy Adamson 	    (((fattr->valid & NFS_ATTR_FATTR_MOUNTPOINT) == 0) &&
32533eb461SAndy Adamson 	     ((fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL) == 0)))
33533eb461SAndy Adamson 		return 0;
34533eb461SAndy Adamson 
35533eb461SAndy Adamson 	fattr->fileid = fattr->mounted_on_fileid;
36533eb461SAndy Adamson 	return 1;
37533eb461SAndy Adamson }
38533eb461SAndy Adamson 
39f7b422b1SDavid Howells struct nfs_clone_mount {
40f7b422b1SDavid Howells 	const struct super_block *sb;
41f7b422b1SDavid Howells 	const struct dentry *dentry;
42f7b422b1SDavid Howells 	struct nfs_fh *fh;
43f7b422b1SDavid Howells 	struct nfs_fattr *fattr;
44f7b422b1SDavid Howells 	char *hostname;
45f7b422b1SDavid Howells 	char *mnt_path;
466677d095SChuck Lever 	struct sockaddr *addr;
476677d095SChuck Lever 	size_t addrlen;
48f7b422b1SDavid Howells 	rpc_authflavor_t authflavor;
49f7b422b1SDavid Howells };
50f7b422b1SDavid Howells 
516b18eaa0S\"Talpey, Thomas\ /*
52a14017dbSChuck Lever  * Note: RFC 1813 doesn't limit the number of auth flavors that
53a14017dbSChuck Lever  * a server can return, so make something up.
54a14017dbSChuck Lever  */
55a14017dbSChuck Lever #define NFS_MAX_SECFLAVORS	(12)
56a14017dbSChuck Lever 
57a14017dbSChuck Lever /*
584cfd74fcSChuck Lever  * Value used if the user did not specify a port value.
594cfd74fcSChuck Lever  */
604cfd74fcSChuck Lever #define NFS_UNSPEC_PORT		(-1)
614cfd74fcSChuck Lever 
624cfd74fcSChuck Lever /*
6356e4ebf8SBryan Schumaker  * Maximum number of pages that readdir can use for creating
6456e4ebf8SBryan Schumaker  * a vmapped array of pages.
6556e4ebf8SBryan Schumaker  */
6656e4ebf8SBryan Schumaker #define NFS_MAX_READDIR_PAGES 8
6756e4ebf8SBryan Schumaker 
68fcf10398SBryan Schumaker struct nfs_client_initdata {
69fcf10398SBryan Schumaker 	unsigned long init_flags;
70fcf10398SBryan Schumaker 	const char *hostname;
71fcf10398SBryan Schumaker 	const struct sockaddr *addr;
72fcf10398SBryan Schumaker 	size_t addrlen;
73ab7017a3SBryan Schumaker 	struct nfs_subversion *nfs_mod;
74fcf10398SBryan Schumaker 	int proto;
75fcf10398SBryan Schumaker 	u32 minorversion;
76fcf10398SBryan Schumaker 	struct net *net;
77fcf10398SBryan Schumaker };
78fcf10398SBryan Schumaker 
7956e4ebf8SBryan Schumaker /*
806b18eaa0S\"Talpey, Thomas\  * In-kernel mount arguments
816b18eaa0S\"Talpey, Thomas\  */
826b18eaa0S\"Talpey, Thomas\ struct nfs_parsed_mount_data {
836b18eaa0S\"Talpey, Thomas\ 	int			flags;
848cb7f74eSChuck Lever 	unsigned int		rsize, wsize;
858cb7f74eSChuck Lever 	unsigned int		timeo, retrans;
868cb7f74eSChuck Lever 	unsigned int		acregmin, acregmax,
876b18eaa0S\"Talpey, Thomas\ 				acdirmin, acdirmax;
888cb7f74eSChuck Lever 	unsigned int		namlen;
89b797cac7SDavid Howells 	unsigned int		options;
906b18eaa0S\"Talpey, Thomas\ 	unsigned int		bsize;
916b18eaa0S\"Talpey, Thomas\ 	unsigned int		auth_flavor_len;
926b18eaa0S\"Talpey, Thomas\ 	rpc_authflavor_t	auth_flavors[1];
936b18eaa0S\"Talpey, Thomas\ 	char			*client_address;
94764302ccSChuck Lever 	unsigned int		version;
953fd5be9eSMike Sager 	unsigned int		minorversion;
9608734048SDavid Howells 	char			*fscache_uniq;
97b72e4f42SBryan Schumaker 	bool			need_mount;
986b18eaa0S\"Talpey, Thomas\ 
996b18eaa0S\"Talpey, Thomas\ 	struct {
1004c568017SChuck Lever 		struct sockaddr_storage	address;
1014c568017SChuck Lever 		size_t			addrlen;
1026b18eaa0S\"Talpey, Thomas\ 		char			*hostname;
10378fa701fSChuck Lever 		u32			version;
1044cfd74fcSChuck Lever 		int			port;
10578fa701fSChuck Lever 		unsigned short		protocol;
1066b18eaa0S\"Talpey, Thomas\ 	} mount_server;
1076b18eaa0S\"Talpey, Thomas\ 
1086b18eaa0S\"Talpey, Thomas\ 	struct {
1094c568017SChuck Lever 		struct sockaddr_storage	address;
1104c568017SChuck Lever 		size_t			addrlen;
1116b18eaa0S\"Talpey, Thomas\ 		char			*hostname;
1126b18eaa0S\"Talpey, Thomas\ 		char			*export_path;
1134cfd74fcSChuck Lever 		int			port;
11478fa701fSChuck Lever 		unsigned short		protocol;
1156b18eaa0S\"Talpey, Thomas\ 	} nfs_server;
116f9c3a380SEric Paris 
117f9c3a380SEric Paris 	struct security_mnt_opts lsm_opts;
118e50a7a1aSStanislav Kinsbursky 	struct net		*net;
1196b18eaa0S\"Talpey, Thomas\ };
1206b18eaa0S\"Talpey, Thomas\ 
121146ec944SChuck Lever /* mount_clnt.c */
122c5d120f8SChuck Lever struct nfs_mount_request {
123c5d120f8SChuck Lever 	struct sockaddr		*sap;
124c5d120f8SChuck Lever 	size_t			salen;
125c5d120f8SChuck Lever 	char			*hostname;
126c5d120f8SChuck Lever 	char			*dirpath;
127c5d120f8SChuck Lever 	u32			version;
128c5d120f8SChuck Lever 	unsigned short		protocol;
129c5d120f8SChuck Lever 	struct nfs_fh		*fh;
13050a737f8SChuck Lever 	int			noresvport;
1318e02f6b9SChuck Lever 	unsigned int		*auth_flav_len;
1328e02f6b9SChuck Lever 	rpc_authflavor_t	*auth_flavs;
1336d59b8d5SStanislav Kinsbursky 	struct net		*net;
134c5d120f8SChuck Lever };
135c5d120f8SChuck Lever 
136fbdefd64SBryan Schumaker struct nfs_mount_info {
137fbdefd64SBryan Schumaker 	void (*fill_super)(struct super_block *, struct nfs_mount_info *);
138fbdefd64SBryan Schumaker 	int (*set_security)(struct super_block *, struct dentry *, struct nfs_mount_info *);
139fbdefd64SBryan Schumaker 	struct nfs_parsed_mount_data *parsed;
140fbdefd64SBryan Schumaker 	struct nfs_clone_mount *cloned;
141fbdefd64SBryan Schumaker 	struct nfs_fh *mntfh;
142fbdefd64SBryan Schumaker };
143fbdefd64SBryan Schumaker 
144c5d120f8SChuck Lever extern int nfs_mount(struct nfs_mount_request *info);
1450b524123SChuck Lever extern void nfs_umount(const struct nfs_mount_request *info);
146146ec944SChuck Lever 
14724c8dbbbSDavid Howells /* client.c */
148a613fa16STrond Myklebust extern const struct rpc_program nfs_program;
1496b13168bSStanislav Kinsbursky extern void nfs_clients_init(struct net *net);
1506663ee7fSBryan Schumaker extern struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *);
151428360d7SBryan Schumaker int nfs_create_rpc_client(struct nfs_client *, const struct rpc_timeout *, rpc_authflavor_t);
152fcf10398SBryan Schumaker struct nfs_client *nfs_get_client(const struct nfs_client_initdata *,
153fcf10398SBryan Schumaker 				  const struct rpc_timeout *, const char *,
154fcf10398SBryan Schumaker 				  rpc_authflavor_t);
155fcf10398SBryan Schumaker int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *, struct nfs_fattr *);
156fcf10398SBryan Schumaker void nfs_server_insert_lists(struct nfs_server *);
157fcf10398SBryan Schumaker void nfs_init_timeout_values(struct rpc_timeout *, int, unsigned int, unsigned int);
158fcf10398SBryan Schumaker int nfs_init_server_rpcclient(struct nfs_server *, const struct rpc_timeout *t,
159fcf10398SBryan Schumaker 		rpc_authflavor_t);
160fcf10398SBryan Schumaker struct nfs_server *nfs_alloc_server(void);
161fcf10398SBryan Schumaker void nfs_server_copy_userdata(struct nfs_server *, struct nfs_server *);
16254ceac45SDavid Howells 
16328cd1b3fSStanislav Kinsbursky extern void nfs_cleanup_cb_ident_idr(struct net *);
16424c8dbbbSDavid Howells extern void nfs_put_client(struct nfs_client *);
165cdb7ecedSBryan Schumaker extern void nfs_free_client(struct nfs_client *);
16628cd1b3fSStanislav Kinsbursky extern struct nfs_client *nfs4_find_client_ident(struct net *, int);
167c36fca52SAndy Adamson extern struct nfs_client *
168c7add9a9SStanislav Kinsbursky nfs4_find_client_sessionid(struct net *, const struct sockaddr *,
169459de2edSBryan Schumaker 				struct nfs4_sessionid *, u32);
1701179acc6SBryan Schumaker extern struct nfs_server *nfs_create_server(struct nfs_mount_info *,
171ab7017a3SBryan Schumaker 					struct nfs_subversion *);
17291ea40b9S\"Talpey, Thomas\ extern struct nfs_server *nfs4_create_server(
1731179acc6SBryan Schumaker 					struct nfs_mount_info *,
1741179acc6SBryan Schumaker 					struct nfs_subversion *);
17554ceac45SDavid Howells extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *,
17654ceac45SDavid Howells 						      struct nfs_fh *);
17754ceac45SDavid Howells extern void nfs_free_server(struct nfs_server *server);
17854ceac45SDavid Howells extern struct nfs_server *nfs_clone_server(struct nfs_server *,
17954ceac45SDavid Howells 					   struct nfs_fh *,
1807e6eb683SBryan Schumaker 					   struct nfs_fattr *,
1817e6eb683SBryan Schumaker 					   rpc_authflavor_t);
1824697bd5eSTrond Myklebust extern int nfs_wait_client_init_complete(const struct nfs_client *clp);
18376db6d95SAndy Adamson extern void nfs_mark_client_ready(struct nfs_client *clp, int state);
184d83217c1SAndy Adamson extern struct nfs_client *nfs4_set_ds_client(struct nfs_client* mds_clp,
185d83217c1SAndy Adamson 					     const struct sockaddr *ds_addr,
18698fc685aSAndy Adamson 					     int ds_addrlen, int ds_proto,
18798fc685aSAndy Adamson 					     unsigned int ds_timeo,
18898fc685aSAndy Adamson 					     unsigned int ds_retrans);
1890e20162eSAndy Adamson extern struct rpc_clnt *nfs4_find_or_create_ds_client(struct nfs_client *,
1900e20162eSAndy Adamson 						struct inode *);
1916aaca566SDavid Howells #ifdef CONFIG_PROC_FS
1926aaca566SDavid Howells extern int __init nfs_fs_proc_init(void);
1936aaca566SDavid Howells extern void nfs_fs_proc_exit(void);
1946aaca566SDavid Howells #else
1956aaca566SDavid Howells static inline int nfs_fs_proc_init(void)
1966aaca566SDavid Howells {
1976aaca566SDavid Howells 	return 0;
1986aaca566SDavid Howells }
1996aaca566SDavid Howells static inline void nfs_fs_proc_exit(void)
2006aaca566SDavid Howells {
2016aaca566SDavid Howells }
2026aaca566SDavid Howells #endif
20324c8dbbbSDavid Howells 
204fcf10398SBryan Schumaker #ifdef CONFIG_NFS_V4_1
205fcf10398SBryan Schumaker int nfs_sockaddr_match_ipaddr(const struct sockaddr *, const struct sockaddr *);
206fcf10398SBryan Schumaker #endif
207fcf10398SBryan Schumaker 
2081179acc6SBryan Schumaker /* nfs3client.c */
2091c606fb7SBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V3)
2101179acc6SBryan Schumaker struct nfs_server *nfs3_create_server(struct nfs_mount_info *, struct nfs_subversion *);
2111179acc6SBryan Schumaker struct nfs_server *nfs3_clone_server(struct nfs_server *, struct nfs_fh *,
2121179acc6SBryan Schumaker 				     struct nfs_fattr *, rpc_authflavor_t);
2131179acc6SBryan Schumaker #endif
2141179acc6SBryan Schumaker 
215f7b422b1SDavid Howells /* callback_xdr.c */
216f7b422b1SDavid Howells extern struct svc_version nfs4_callback_version1;
21707bccc2dSAlexandros Batsakis extern struct svc_version nfs4_callback_version4;
218f7b422b1SDavid Howells 
2194db6e0b7SFred Isaman struct nfs_pageio_descriptor;
220f7b422b1SDavid Howells /* pagelist.c */
221f7b422b1SDavid Howells extern int __init nfs_init_nfspagecache(void);
222266bee88SDavid Brownell extern void nfs_destroy_nfspagecache(void);
223f7b422b1SDavid Howells extern int __init nfs_init_readpagecache(void);
224266bee88SDavid Brownell extern void nfs_destroy_readpagecache(void);
225f7b422b1SDavid Howells extern int __init nfs_init_writepagecache(void);
226266bee88SDavid Brownell extern void nfs_destroy_writepagecache(void);
227f7b422b1SDavid Howells 
228f7b422b1SDavid Howells extern int __init nfs_init_directcache(void);
229266bee88SDavid Brownell extern void nfs_destroy_directcache(void);
23030dd374fSFred Isaman extern bool nfs_pgarray_set(struct nfs_page_array *p, unsigned int pagecount);
2314db6e0b7SFred Isaman extern void nfs_pgheader_init(struct nfs_pageio_descriptor *desc,
2324db6e0b7SFred Isaman 			      struct nfs_pgio_header *hdr,
2334db6e0b7SFred Isaman 			      void (*release)(struct nfs_pgio_header *hdr));
2344db6e0b7SFred Isaman void nfs_set_pgio_error(struct nfs_pgio_header *hdr, int error, loff_t pos);
235577b4232STrond Myklebust int nfs_iocounter_wait(struct nfs_io_counter *c);
236577b4232STrond Myklebust 
237577b4232STrond Myklebust static inline void nfs_iocounter_init(struct nfs_io_counter *c)
238577b4232STrond Myklebust {
239577b4232STrond Myklebust 	c->flags = 0;
240577b4232STrond Myklebust 	atomic_set(&c->io_count, 0);
241577b4232STrond Myklebust }
242f7b422b1SDavid Howells 
243f7b422b1SDavid Howells /* nfs2xdr.c */
244f7b422b1SDavid Howells extern struct rpc_procinfo nfs_procedures[];
245573c4e1eSChuck Lever extern int nfs2_decode_dirent(struct xdr_stream *,
246573c4e1eSChuck Lever 				struct nfs_entry *, int);
247f7b422b1SDavid Howells 
248f7b422b1SDavid Howells /* nfs3xdr.c */
249f7b422b1SDavid Howells extern struct rpc_procinfo nfs3_procedures[];
250573c4e1eSChuck Lever extern int nfs3_decode_dirent(struct xdr_stream *,
251573c4e1eSChuck Lever 				struct nfs_entry *, int);
252f7b422b1SDavid Howells 
253f7b422b1SDavid Howells /* nfs4xdr.c */
25489d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4)
255573c4e1eSChuck Lever extern int nfs4_decode_dirent(struct xdr_stream *,
256573c4e1eSChuck Lever 				struct nfs_entry *, int);
2577d4e2747SDavid Howells #endif
2582449ea2eSAlexandros Batsakis #ifdef CONFIG_NFS_V4_1
2592449ea2eSAlexandros Batsakis extern const u32 nfs41_maxread_overhead;
2602449ea2eSAlexandros Batsakis extern const u32 nfs41_maxwrite_overhead;
261f1c097beSAndy Adamson extern const u32 nfs41_maxgetdevinfo_overhead;
2622449ea2eSAlexandros Batsakis #endif
263f7b422b1SDavid Howells 
264f7b422b1SDavid Howells /* nfs4proc.c */
26589d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4)
266f7b422b1SDavid Howells extern struct rpc_procinfo nfs4_procedures[];
267d75d5414SAndrew Morton #endif
268f7b422b1SDavid Howells 
2697fe5c398STrond Myklebust /* proc.c */
2707fe5c398STrond Myklebust void nfs_close_context(struct nfs_open_context *ctx, int is_sync);
2718cab4c39SChuck Lever extern struct nfs_client *nfs_init_client(struct nfs_client *clp,
27245a52a02SAndy Adamson 			   const struct rpc_timeout *timeparms,
273f8407299SAndy Adamson 			   const char *ip_addr);
2747fe5c398STrond Myklebust 
275979df72eSTrond Myklebust /* dir.c */
2767f8275d0SDave Chinner extern int nfs_access_cache_shrinker(struct shrinker *shrink,
2771495f230SYing Han 					struct shrink_control *sc);
278597d9289SBryan Schumaker struct dentry *nfs_lookup(struct inode *, struct dentry *, unsigned int);
279597d9289SBryan Schumaker int nfs_create(struct inode *, struct dentry *, umode_t, bool);
280597d9289SBryan Schumaker int nfs_mkdir(struct inode *, struct dentry *, umode_t);
281597d9289SBryan Schumaker int nfs_rmdir(struct inode *, struct dentry *);
282597d9289SBryan Schumaker int nfs_unlink(struct inode *, struct dentry *);
283597d9289SBryan Schumaker int nfs_symlink(struct inode *, struct dentry *, const char *);
284597d9289SBryan Schumaker int nfs_link(struct dentry *, struct inode *, struct dentry *);
285597d9289SBryan Schumaker int nfs_mknod(struct inode *, struct dentry *, umode_t, dev_t);
286597d9289SBryan Schumaker int nfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *);
287979df72eSTrond Myklebust 
288ce4ef7c0SBryan Schumaker /* file.c */
289ce4ef7c0SBryan Schumaker int nfs_file_fsync_commit(struct file *, loff_t, loff_t, int);
290ce4ef7c0SBryan Schumaker loff_t nfs_file_llseek(struct file *, loff_t, int);
291ce4ef7c0SBryan Schumaker int nfs_file_flush(struct file *, fl_owner_t);
292ce4ef7c0SBryan Schumaker ssize_t nfs_file_read(struct kiocb *, const struct iovec *, unsigned long, loff_t);
293ce4ef7c0SBryan Schumaker ssize_t nfs_file_splice_read(struct file *, loff_t *, struct pipe_inode_info *,
294ce4ef7c0SBryan Schumaker 			     size_t, unsigned int);
295ce4ef7c0SBryan Schumaker int nfs_file_mmap(struct file *, struct vm_area_struct *);
296ce4ef7c0SBryan Schumaker ssize_t nfs_file_write(struct kiocb *, const struct iovec *, unsigned long, loff_t);
297ce4ef7c0SBryan Schumaker int nfs_file_release(struct inode *, struct file *);
298ce4ef7c0SBryan Schumaker int nfs_lock(struct file *, int, struct file_lock *);
299ce4ef7c0SBryan Schumaker int nfs_flock(struct file *, int, struct file_lock *);
300ce4ef7c0SBryan Schumaker ssize_t nfs_file_splice_write(struct pipe_inode_info *, struct file *, loff_t *,
301ce4ef7c0SBryan Schumaker 			      size_t, unsigned int);
302ce4ef7c0SBryan Schumaker int nfs_check_flags(int);
303ce4ef7c0SBryan Schumaker int nfs_setlease(struct file *, long, struct file_lock **);
304ce4ef7c0SBryan Schumaker 
305f7b422b1SDavid Howells /* inode.c */
3065746006fSTrond Myklebust extern struct workqueue_struct *nfsiod_workqueue;
307f7b422b1SDavid Howells extern struct inode *nfs_alloc_inode(struct super_block *sb);
308f7b422b1SDavid Howells extern void nfs_destroy_inode(struct inode *);
309a9185b41SChristoph Hellwig extern int nfs_write_inode(struct inode *, struct writeback_control *);
310eed99357STrond Myklebust extern int nfs_drop_inode(struct inode *);
31119d87ca3SBryan Schumaker extern void nfs_clear_inode(struct inode *);
312b57922d9SAl Viro extern void nfs_evict_inode(struct inode *);
313f41f7418STrond Myklebust void nfs_zap_acl_cache(struct inode *inode);
31472cb77f4STrond Myklebust extern int nfs_wait_bit_killable(void *word);
315f7b422b1SDavid Howells 
316f7b422b1SDavid Howells /* super.c */
3176a74490dSBryan Schumaker extern const struct super_operations nfs_sops;
318ab7017a3SBryan Schumaker extern struct file_system_type nfs_fs_type;
31954ceac45SDavid Howells extern struct file_system_type nfs_xdev_fs_type;
32089d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4)
32154ceac45SDavid Howells extern struct file_system_type nfs4_xdev_fs_type;
32254ceac45SDavid Howells extern struct file_system_type nfs4_referral_fs_type;
323f7b422b1SDavid Howells #endif
324ff9099f2SBryan Schumaker struct dentry *nfs_try_mount(int, const char *, struct nfs_mount_info *,
325ff9099f2SBryan Schumaker 			struct nfs_subversion *);
326fbdefd64SBryan Schumaker void nfs_initialise_sb(struct super_block *);
327fbdefd64SBryan Schumaker int nfs_set_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *);
328fbdefd64SBryan Schumaker int nfs_clone_sb_security(struct super_block *, struct dentry *, struct nfs_mount_info *);
329ab7017a3SBryan Schumaker struct dentry *nfs_fs_mount_common(struct nfs_server *, int, const char *,
330ab7017a3SBryan Schumaker 				   struct nfs_mount_info *, struct nfs_subversion *);
331fbdefd64SBryan Schumaker struct dentry *nfs_fs_mount(struct file_system_type *, int, const char *, void *);
332fbdefd64SBryan Schumaker struct dentry * nfs_xdev_mount_common(struct file_system_type *, int,
333fbdefd64SBryan Schumaker 		const char *, struct nfs_mount_info *);
334fbdefd64SBryan Schumaker void nfs_kill_super(struct super_block *);
335fbdefd64SBryan Schumaker void nfs_fill_super(struct super_block *, struct nfs_mount_info *);
3364ebd9ab3SDominik Hackl 
337f7b422b1SDavid Howells extern struct rpc_stat nfs_rpcstat;
3384ebd9ab3SDominik Hackl 
339f7b422b1SDavid Howells extern int __init register_nfs_fs(void);
340f7b422b1SDavid Howells extern void __exit unregister_nfs_fs(void);
3411daef0a8STrond Myklebust extern void nfs_sb_active(struct super_block *sb);
3421daef0a8STrond Myklebust extern void nfs_sb_deactive(struct super_block *sb);
343f7b422b1SDavid Howells 
344f7b422b1SDavid Howells /* namespace.c */
34597a54868SBen Hutchings #define NFS_PATH_CANONICAL 1
346b514f872SAl Viro extern char *nfs_path(char **p, struct dentry *dentry,
34797a54868SBen Hutchings 		      char *buffer, ssize_t buflen, unsigned flags);
34836d43a43SDavid Howells extern struct vfsmount *nfs_d_automount(struct path *path);
349281cad46SBryan Schumaker struct vfsmount *nfs_submount(struct nfs_server *, struct dentry *,
350281cad46SBryan Schumaker 			      struct nfs_fh *, struct nfs_fattr *);
351281cad46SBryan Schumaker struct vfsmount *nfs_do_submount(struct dentry *, struct nfs_fh *,
352281cad46SBryan Schumaker 				 struct nfs_fattr *, rpc_authflavor_t);
353f7b422b1SDavid Howells 
35454ceac45SDavid Howells /* getroot.c */
3550d5839adSAl Viro extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *,
3560d5839adSAl Viro 				   const char *);
35789d77c8fSBryan Schumaker #if IS_ENABLED(CONFIG_NFS_V4)
3580d5839adSAl Viro extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *,
3590d5839adSAl Viro 				    const char *);
36054ceac45SDavid Howells 
361815409d2STrond Myklebust extern int nfs4_get_rootfh(struct nfs_server *server, struct nfs_fh *mntfh);
3627d4e2747SDavid Howells #endif
363f7b422b1SDavid Howells 
364061ae2edSFred Isaman struct nfs_pgio_completion_ops;
365f11c88afSAndy Adamson /* read.c */
3664db6e0b7SFred Isaman extern struct nfs_read_header *nfs_readhdr_alloc(void);
367cd841605SFred Isaman extern void nfs_readhdr_free(struct nfs_pgio_header *hdr);
368584aa810SFred Isaman extern void nfs_pageio_init_read(struct nfs_pageio_descriptor *pgio,
369584aa810SFred Isaman 			struct inode *inode,
370584aa810SFred Isaman 			const struct nfs_pgio_completion_ops *compl_ops);
371c5996c4eSFred Isaman extern int nfs_initiate_read(struct rpc_clnt *clnt,
372c5996c4eSFred Isaman 			     struct nfs_read_data *data,
3739f0ec176SAndy Adamson 			     const struct rpc_call_ops *call_ops, int flags);
374f11c88afSAndy Adamson extern void nfs_read_prepare(struct rpc_task *task, void *calldata);
375493292ddSTrond Myklebust extern int nfs_generic_pagein(struct nfs_pageio_descriptor *desc,
3764db6e0b7SFred Isaman 			      struct nfs_pgio_header *hdr);
377493292ddSTrond Myklebust extern void nfs_pageio_reset_read_mds(struct nfs_pageio_descriptor *pgio);
378493292ddSTrond Myklebust extern void nfs_readdata_release(struct nfs_read_data *rdata);
379e885de1aSTrond Myklebust 
380fbdefd64SBryan Schumaker /* super.c */
381fbdefd64SBryan Schumaker void nfs_clone_super(struct super_block *, struct nfs_mount_info *);
382fbdefd64SBryan Schumaker void nfs_umount_begin(struct super_block *);
383fbdefd64SBryan Schumaker int  nfs_statfs(struct dentry *, struct kstatfs *);
384fbdefd64SBryan Schumaker int  nfs_show_options(struct seq_file *, struct dentry *);
385fbdefd64SBryan Schumaker int  nfs_show_devname(struct seq_file *, struct dentry *);
386fbdefd64SBryan Schumaker int  nfs_show_path(struct seq_file *, struct dentry *);
387fbdefd64SBryan Schumaker int  nfs_show_stats(struct seq_file *, struct dentry *);
388fbdefd64SBryan Schumaker void nfs_put_super(struct super_block *);
389fbdefd64SBryan Schumaker int nfs_remount(struct super_block *sb, int *flags, char *raw_data);
390fbdefd64SBryan Schumaker 
391def6ed7eSAndy Adamson /* write.c */
3921763da12SFred Isaman extern void nfs_pageio_init_write(struct nfs_pageio_descriptor *pgio,
3931763da12SFred Isaman 			struct inode *inode, int ioflags,
3941763da12SFred Isaman 			const struct nfs_pgio_completion_ops *compl_ops);
3956c75dc0dSFred Isaman extern struct nfs_write_header *nfs_writehdr_alloc(void);
396cd841605SFred Isaman extern void nfs_writehdr_free(struct nfs_pgio_header *hdr);
397dce81290STrond Myklebust extern int nfs_generic_flush(struct nfs_pageio_descriptor *desc,
3986c75dc0dSFred Isaman 			     struct nfs_pgio_header *hdr);
399dce81290STrond Myklebust extern void nfs_pageio_reset_write_mds(struct nfs_pageio_descriptor *pgio);
400dce81290STrond Myklebust extern void nfs_writedata_release(struct nfs_write_data *wdata);
4010b7c0153SFred Isaman extern void nfs_commit_free(struct nfs_commit_data *p);
402c5996c4eSFred Isaman extern int nfs_initiate_write(struct rpc_clnt *clnt,
403c5996c4eSFred Isaman 			      struct nfs_write_data *data,
404a69aef14SFred Isaman 			      const struct rpc_call_ops *call_ops,
4059f0ec176SAndy Adamson 			      int how, int flags);
406def6ed7eSAndy Adamson extern void nfs_write_prepare(struct rpc_task *task, void *calldata);
4070b7c0153SFred Isaman extern void nfs_commit_prepare(struct rpc_task *task, void *calldata);
4080b7c0153SFred Isaman extern int nfs_initiate_commit(struct rpc_clnt *clnt,
4090b7c0153SFred Isaman 			       struct nfs_commit_data *data,
410e0c2b380SFred Isaman 			       const struct rpc_call_ops *call_ops,
4119f0ec176SAndy Adamson 			       int how, int flags);
4120b7c0153SFred Isaman extern void nfs_init_commit(struct nfs_commit_data *data,
413e0c2b380SFred Isaman 			    struct list_head *head,
414f453a54aSFred Isaman 			    struct pnfs_layout_segment *lseg,
415f453a54aSFred Isaman 			    struct nfs_commit_info *cinfo);
4161763da12SFred Isaman int nfs_scan_commit_list(struct list_head *src, struct list_head *dst,
4171763da12SFred Isaman 			 struct nfs_commit_info *cinfo, int max);
4181763da12SFred Isaman int nfs_scan_commit(struct inode *inode, struct list_head *dst,
4191763da12SFred Isaman 		    struct nfs_commit_info *cinfo);
4201763da12SFred Isaman void nfs_mark_request_commit(struct nfs_page *req,
4211763da12SFred Isaman 			     struct pnfs_layout_segment *lseg,
4221763da12SFred Isaman 			     struct nfs_commit_info *cinfo);
4231763da12SFred Isaman int nfs_generic_commit_list(struct inode *inode, struct list_head *head,
4241763da12SFred Isaman 			    int how, struct nfs_commit_info *cinfo);
425e0c2b380SFred Isaman void nfs_retry_commit(struct list_head *page_list,
426ea2cf228SFred Isaman 		      struct pnfs_layout_segment *lseg,
427ea2cf228SFred Isaman 		      struct nfs_commit_info *cinfo);
4280b7c0153SFred Isaman void nfs_commitdata_release(struct nfs_commit_data *data);
429ea2cf228SFred Isaman void nfs_request_add_commit_list(struct nfs_page *req, struct list_head *dst,
430ea2cf228SFred Isaman 				 struct nfs_commit_info *cinfo);
431ea2cf228SFred Isaman void nfs_request_remove_commit_list(struct nfs_page *req,
432ea2cf228SFred Isaman 				    struct nfs_commit_info *cinfo);
433ea2cf228SFred Isaman void nfs_init_cinfo(struct nfs_commit_info *cinfo,
434ea2cf228SFred Isaman 		    struct inode *inode,
435ea2cf228SFred Isaman 		    struct nfs_direct_req *dreq);
436dc24826bSAndy Adamson int nfs_key_timeout_notify(struct file *filp, struct inode *inode);
437dc24826bSAndy Adamson bool nfs_ctx_key_to_expire(struct nfs_open_context *ctx);
438e0c2b380SFred Isaman 
439074cc1deSTrond Myklebust #ifdef CONFIG_MIGRATION
440074cc1deSTrond Myklebust extern int nfs_migrate_page(struct address_space *,
441a6bc32b8SMel Gorman 		struct page *, struct page *, enum migrate_mode);
442074cc1deSTrond Myklebust #else
443074cc1deSTrond Myklebust #define nfs_migrate_page NULL
444074cc1deSTrond Myklebust #endif
445def6ed7eSAndy Adamson 
4461763da12SFred Isaman /* direct.c */
4471763da12SFred Isaman void nfs_init_cinfo_from_dreq(struct nfs_commit_info *cinfo,
4481763da12SFred Isaman 			      struct nfs_direct_req *dreq);
4491d59d61fSTrond Myklebust static inline void nfs_inode_dio_wait(struct inode *inode)
4501d59d61fSTrond Myklebust {
4511d59d61fSTrond Myklebust 	inode_dio_wait(inode);
4521d59d61fSTrond Myklebust }
4536296556fSPeng Tao extern ssize_t nfs_dreq_bytes_left(struct nfs_direct_req *dreq);
4541763da12SFred Isaman 
455cccef3b9SAndy Adamson /* nfs4proc.c */
456d20581aaSBenny Halevy extern void __nfs4_read_done_cb(struct nfs_read_data *);
4578cab4c39SChuck Lever extern struct nfs_client *nfs4_init_client(struct nfs_client *clp,
45845a52a02SAndy Adamson 			    const struct rpc_timeout *timeparms,
459f8407299SAndy Adamson 			    const char *ip_addr);
46005f4c350SChuck Lever extern int nfs40_walk_client_list(struct nfs_client *clp,
46105f4c350SChuck Lever 				struct nfs_client **result,
46205f4c350SChuck Lever 				struct rpc_cred *cred);
46305f4c350SChuck Lever extern int nfs41_walk_client_list(struct nfs_client *clp,
46405f4c350SChuck Lever 				struct nfs_client **result,
46505f4c350SChuck Lever 				struct rpc_cred *cred);
466cccef3b9SAndy Adamson 
467557134a3SAndy Adamson /*
468f7b422b1SDavid Howells  * Determine the device name as a string
469f7b422b1SDavid Howells  */
470b514f872SAl Viro static inline char *nfs_devname(struct dentry *dentry,
471f7b422b1SDavid Howells 				char *buffer, ssize_t buflen)
472f7b422b1SDavid Howells {
473b514f872SAl Viro 	char *dummy;
47497a54868SBen Hutchings 	return nfs_path(&dummy, dentry, buffer, buflen, NFS_PATH_CANONICAL);
475f7b422b1SDavid Howells }
476f7b422b1SDavid Howells 
477f7b422b1SDavid Howells /*
478f7b422b1SDavid Howells  * Determine the actual block size (and log2 thereof)
479f7b422b1SDavid Howells  */
480f7b422b1SDavid Howells static inline
481f7b422b1SDavid Howells unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp)
482f7b422b1SDavid Howells {
483f7b422b1SDavid Howells 	/* make sure blocksize is a power of two */
484f7b422b1SDavid Howells 	if ((bsize & (bsize - 1)) || nrbitsp) {
485f7b422b1SDavid Howells 		unsigned char	nrbits;
486f7b422b1SDavid Howells 
487f7b422b1SDavid Howells 		for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--)
488f7b422b1SDavid Howells 			;
489f7b422b1SDavid Howells 		bsize = 1 << nrbits;
490f7b422b1SDavid Howells 		if (nrbitsp)
491f7b422b1SDavid Howells 			*nrbitsp = nrbits;
492f7b422b1SDavid Howells 	}
493f7b422b1SDavid Howells 
494f7b422b1SDavid Howells 	return bsize;
495f7b422b1SDavid Howells }
496f7b422b1SDavid Howells 
497f7b422b1SDavid Howells /*
498f7b422b1SDavid Howells  * Calculate the number of 512byte blocks used.
499f7b422b1SDavid Howells  */
5009eaa67c6SChuck Lever static inline blkcnt_t nfs_calc_block_size(u64 tsize)
501f7b422b1SDavid Howells {
5029eaa67c6SChuck Lever 	blkcnt_t used = (tsize + 511) >> 9;
503f7b422b1SDavid Howells 	return (used > ULONG_MAX) ? ULONG_MAX : used;
504f7b422b1SDavid Howells }
505f7b422b1SDavid Howells 
506f7b422b1SDavid Howells /*
507f7b422b1SDavid Howells  * Compute and set NFS server blocksize
508f7b422b1SDavid Howells  */
509f7b422b1SDavid Howells static inline
510f7b422b1SDavid Howells unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp)
511f7b422b1SDavid Howells {
512f7b422b1SDavid Howells 	if (bsize < NFS_MIN_FILE_IO_SIZE)
513f7b422b1SDavid Howells 		bsize = NFS_DEF_FILE_IO_SIZE;
514f7b422b1SDavid Howells 	else if (bsize >= NFS_MAX_FILE_IO_SIZE)
515f7b422b1SDavid Howells 		bsize = NFS_MAX_FILE_IO_SIZE;
516f7b422b1SDavid Howells 
517f7b422b1SDavid Howells 	return nfs_block_bits(bsize, nrbitsp);
518f7b422b1SDavid Howells }
519f7b422b1SDavid Howells 
520f7b422b1SDavid Howells /*
521f7b422b1SDavid Howells  * Determine the maximum file size for a superblock
522f7b422b1SDavid Howells  */
523f7b422b1SDavid Howells static inline
524f7b422b1SDavid Howells void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize)
525f7b422b1SDavid Howells {
526f7b422b1SDavid Howells 	sb->s_maxbytes = (loff_t)maxfilesize;
527f7b422b1SDavid Howells 	if (sb->s_maxbytes > MAX_LFS_FILESIZE || sb->s_maxbytes <= 0)
528f7b422b1SDavid Howells 		sb->s_maxbytes = MAX_LFS_FILESIZE;
529f7b422b1SDavid Howells }
53049a70f27STrond Myklebust 
53149a70f27STrond Myklebust /*
53249a70f27STrond Myklebust  * Determine the number of bytes of data the page contains
53349a70f27STrond Myklebust  */
53449a70f27STrond Myklebust static inline
53549a70f27STrond Myklebust unsigned int nfs_page_length(struct page *page)
53649a70f27STrond Myklebust {
537d56b4ddfSMel Gorman 	loff_t i_size = i_size_read(page_file_mapping(page)->host);
53849a70f27STrond Myklebust 
53949a70f27STrond Myklebust 	if (i_size > 0) {
540d56b4ddfSMel Gorman 		pgoff_t page_index = page_file_index(page);
54149a70f27STrond Myklebust 		pgoff_t end_index = (i_size - 1) >> PAGE_CACHE_SHIFT;
542d56b4ddfSMel Gorman 		if (page_index < end_index)
54349a70f27STrond Myklebust 			return PAGE_CACHE_SIZE;
544d56b4ddfSMel Gorman 		if (page_index == end_index)
54549a70f27STrond Myklebust 			return ((i_size - 1) & ~PAGE_CACHE_MASK) + 1;
54649a70f27STrond Myklebust 	}
54749a70f27STrond Myklebust 	return 0;
54849a70f27STrond Myklebust }
5498d5658c9STrond Myklebust 
5508d5658c9STrond Myklebust /*
5510b26a0bfSTrond Myklebust  * Convert a umode to a dirent->d_type
5520b26a0bfSTrond Myklebust  */
5530b26a0bfSTrond Myklebust static inline
5540b26a0bfSTrond Myklebust unsigned char nfs_umode_to_dtype(umode_t mode)
5550b26a0bfSTrond Myklebust {
5560b26a0bfSTrond Myklebust 	return (mode >> 12) & 15;
5570b26a0bfSTrond Myklebust }
5580b26a0bfSTrond Myklebust 
5590b26a0bfSTrond Myklebust /*
5608d5658c9STrond Myklebust  * Determine the number of pages in an array of length 'len' and
5618d5658c9STrond Myklebust  * with a base offset of 'base'
5628d5658c9STrond Myklebust  */
5638d5658c9STrond Myklebust static inline
5648d5658c9STrond Myklebust unsigned int nfs_page_array_len(unsigned int base, size_t len)
5658d5658c9STrond Myklebust {
5668d5658c9STrond Myklebust 	return ((unsigned long)len + (unsigned long)base +
5678d5658c9STrond Myklebust 		PAGE_SIZE - 1) >> PAGE_SHIFT;
5688d5658c9STrond Myklebust }
5690110ee15STrond Myklebust 
5703a1556e8STrond Myklebust /*
5713a1556e8STrond Myklebust  * Convert a struct timespec into a 64-bit change attribute
5723a1556e8STrond Myklebust  *
5733a1556e8STrond Myklebust  * This does approximately the same thing as timespec_to_ns(),
5743a1556e8STrond Myklebust  * but for calculation efficiency, we multiply the seconds by
5753a1556e8STrond Myklebust  * 1024*1024*1024.
5763a1556e8STrond Myklebust  */
5773a1556e8STrond Myklebust static inline
5783a1556e8STrond Myklebust u64 nfs_timespec_to_change_attr(const struct timespec *ts)
5793a1556e8STrond Myklebust {
5803a1556e8STrond Myklebust 	return ((u64)ts->tv_sec << 30) + ts->tv_nsec;
5813a1556e8STrond Myklebust }
5821264a2f0STrond Myklebust 
5831264a2f0STrond Myklebust #ifdef CONFIG_CRC32
5841264a2f0STrond Myklebust /**
5851264a2f0STrond Myklebust  * nfs_fhandle_hash - calculate the crc32 hash for the filehandle
5861264a2f0STrond Myklebust  * @fh - pointer to filehandle
5871264a2f0STrond Myklebust  *
5881264a2f0STrond Myklebust  * returns a crc32 hash for the filehandle that is compatible with
5891264a2f0STrond Myklebust  * the one displayed by "wireshark".
5901264a2f0STrond Myklebust  */
5911264a2f0STrond Myklebust static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh)
5921264a2f0STrond Myklebust {
5931264a2f0STrond Myklebust 	return ~crc32_le(0xFFFFFFFF, &fh->data[0], fh->size);
5941264a2f0STrond Myklebust }
5951264a2f0STrond Myklebust #else
5961264a2f0STrond Myklebust static inline u32 nfs_fhandle_hash(const struct nfs_fh *fh)
5971264a2f0STrond Myklebust {
5981264a2f0STrond Myklebust 	return 0;
5991264a2f0STrond Myklebust }
6001264a2f0STrond Myklebust #endif
601