[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / nfs / internal.h

/*
 * NFS internal definitions
 */

#include "nfs4_fs.h"
#include <linux/mount.h>
#include <linux/security.h>

#define NFS_MS_MASK (MS_RDONLY|MS_NOSUID|MS_NODEV|MS_NOEXEC|MS_SYNCHRONOUS)

struct nfs_string;

/* Maximum number of readahead requests
 * FIXME: this should really be a sysctl so that users may tune it to suit
 *        their needs. People that do NFS over a slow network, might for
 *        instance want to reduce it to something closer to 1 for improved
 *        interactive response.
 */
#define NFS_MAX_READAHEAD	(RPC_DEF_SLOT_TABLE - 1)

/*
 * Determine if sessions are in use.
 */
static inline int nfs4_has_session(const struct nfs_client *clp)
{
#ifdef CONFIG_NFS_V4_1
	if (clp->cl_session)
		return 1;
#endif /* CONFIG_NFS_V4_1 */
	return 0;
}

struct nfs_clone_mount {
	const struct super_block *sb;
	const struct dentry *dentry;
	struct nfs_fh *fh;
	struct nfs_fattr *fattr;
	char *hostname;
	char *mnt_path;
	struct sockaddr *addr;
	size_t addrlen;
	rpc_authflavor_t authflavor;
};

/*
 * 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)

/*
 * In-kernel mount arguments
 */
struct nfs_parsed_mount_data {
	int			flags;
	int			rsize, wsize;
	int			timeo, retrans;
	int			acregmin, acregmax,
				acdirmin, acdirmax;
	int			namlen;
	unsigned int		options;
	unsigned int		bsize;
	unsigned int		auth_flavor_len;
	rpc_authflavor_t	auth_flavors[1];
	char			*client_address;
	unsigned int		minorversion;
	char			*fscache_uniq;

	struct {
		struct sockaddr_storage	address;
		size_t			addrlen;
		char			*hostname;
		u32			version;
		unsigned short		port;
		unsigned short		protocol;
	} mount_server;

	struct {
		struct sockaddr_storage	address;
		size_t			addrlen;
		char			*hostname;
		char			*export_path;
		unsigned short		port;
		unsigned short		protocol;
	} nfs_server;

	struct security_mnt_opts lsm_opts;
};

/* mount_clnt.c */
struct nfs_mount_request {
	struct sockaddr		*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;
};

extern int nfs_mount(struct nfs_mount_request *info);
extern void nfs_umount(const struct nfs_mount_request *info);

/* client.c */
extern struct rpc_program nfs_program;

extern void nfs_put_client(struct nfs_client *);
extern struct nfs_client *nfs_find_client(const struct sockaddr *, u32);
extern struct nfs_client *nfs_find_client_next(struct nfs_client *);
extern struct nfs_server *nfs_create_server(
					const struct nfs_parsed_mount_data *,
					struct nfs_fh *);
extern struct nfs_server *nfs4_create_server(
					const struct nfs_parsed_mount_data *,
					struct nfs_fh *);
extern struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *,
						      struct nfs_fh *);
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 *);
extern void nfs_mark_client_ready(struct nfs_client *clp, int state);
extern int nfs4_check_client_ready(struct nfs_client *clp);
#ifdef CONFIG_PROC_FS
extern int __init nfs_fs_proc_init(void);
extern void nfs_fs_proc_exit(void);
#else
static inline int nfs_fs_proc_init(void)
{
	return 0;
}
static inline void nfs_fs_proc_exit(void)
{
}
#endif

/* nfs4namespace.c */
#ifdef CONFIG_NFS_V4
extern struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry);
#else
static inline
struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry)
{
	return ERR_PTR(-ENOENT);
}
#endif

/* callback_xdr.c */
extern struct svc_version nfs4_callback_version1;

/* 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);

/* nfs2xdr.c */
extern int nfs_stat_to_errno(int);
extern struct rpc_procinfo nfs_procedures[];
extern __be32 * nfs_decode_dirent(__be32 *, struct nfs_entry *, int);

/* nfs3xdr.c */
extern struct rpc_procinfo nfs3_procedures[];
extern __be32 *nfs3_decode_dirent(__be32 *, struct nfs_entry *, int);

/* nfs4proc.c */
static inline void nfs4_restart_rpc(struct rpc_task *task,
				    const struct nfs_client *clp)
{
#ifdef CONFIG_NFS_V4_1
	if (nfs4_has_session(clp) &&
	    test_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state)) {
		rpc_restart_call_prepare(task);
		return;
	}
#endif /* CONFIG_NFS_V4_1 */
	rpc_restart_call(task);
}

/* nfs4xdr.c */
#ifdef CONFIG_NFS_V4
extern __be32 *nfs4_decode_dirent(__be32 *p, struct nfs_entry *entry, int plus);
#endif

/* nfs4proc.c */
#ifdef CONFIG_NFS_V4
extern struct rpc_procinfo nfs4_procedures[];
#endif

/* proc.c */
void nfs_close_context(struct nfs_open_context *ctx, int is_sync);

/* dir.c */
extern int nfs_access_cache_shrinker(int nr_to_scan, gfp_t gfp_mask);

/* inode.c */
extern struct workqueue_struct *nfsiod_workqueue;
extern struct inode *nfs_alloc_inode(struct super_block *sb);
extern void nfs_destroy_inode(struct inode *);
extern int nfs_write_inode(struct inode *,int);
extern void nfs_clear_inode(struct inode *);
#ifdef CONFIG_NFS_V4
extern void nfs4_clear_inode(struct inode *);
#endif
void nfs_zap_acl_cache(struct inode *inode);
extern int nfs_wait_bit_killable(void *word);

/* super.c */
void nfs_parse_ip_address(char *, size_t, struct sockaddr *, size_t *);
extern struct file_system_type nfs_xdev_fs_type;
#ifdef CONFIG_NFS_V4
extern struct file_system_type nfs4_xdev_fs_type;
extern struct file_system_type nfs4_referral_fs_type;
#endif

extern struct rpc_stat nfs_rpcstat;

extern int __init register_nfs_fs(void);
extern void __exit unregister_nfs_fs(void);
extern void nfs_sb_active(struct super_block *sb);
extern void nfs_sb_deactive(struct super_block *sb);

/* namespace.c */
extern char *nfs_path(const char *base,
		      const struct dentry *droot,
		      const struct dentry *dentry,
		      char *buffer, ssize_t buflen);

/* getroot.c */
extern struct dentry *nfs_get_root(struct super_block *, struct nfs_fh *);
#ifdef CONFIG_NFS_V4
extern struct dentry *nfs4_get_root(struct super_block *, struct nfs_fh *);

extern int nfs4_path_walk(struct nfs_server *server,
			  struct nfs_fh *mntfh,
			  const char *path);
#endif

/* read.c */
extern void nfs_read_prepare(struct rpc_task *task, void *calldata);

/* write.c */
extern void nfs_write_prepare(struct rpc_task *task, void *calldata);

/* nfs4proc.c */
extern int _nfs4_call_sync(struct nfs_server *server,
			   struct rpc_message *msg,
			   struct nfs4_sequence_args *args,
			   struct nfs4_sequence_res *res,
			   int cache_reply);
extern int _nfs4_call_sync_session(struct nfs_server *server,
				   struct rpc_message *msg,
				   struct nfs4_sequence_args *args,
				   struct nfs4_sequence_res *res,
				   int cache_reply);

#ifdef CONFIG_NFS_V4_1
extern void nfs41_sequence_free_slot(const struct nfs_client *,
				     struct nfs4_sequence_res *res);
#endif /* CONFIG_NFS_V4_1 */

static inline void nfs4_sequence_free_slot(const struct nfs_client *clp,
					   struct nfs4_sequence_res *res)
{
#ifdef CONFIG_NFS_V4_1
	if (nfs4_has_session(clp))
		nfs41_sequence_free_slot(clp, res);
#endif /* CONFIG_NFS_V4_1 */
}

/*
 * Determine the device name as a string
 */
static inline char *nfs_devname(const struct vfsmount *mnt_parent,
				const struct dentry *dentry,
				char *buffer, ssize_t buflen)
{
	return nfs_path(mnt_parent->mnt_devname, mnt_parent->mnt_root,
			dentry, buffer, buflen);
}

/*
 * 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);
}

/*
 * 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;
}

/*
 * 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->mapping->host);

	if (i_size > 0) {
		pgoff_t end_index = (i_size - 1) >> PAGE_CACHE_SHIFT;
		if (page->index < end_index)
			return PAGE_CACHE_SIZE;
		if (page->index == end_index)
			return ((i_size - 1) & ~PAGE_CACHE_MASK) + 1;
	}
	return 0;
}

/*
 * 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;
}

#define IPV6_SCOPE_DELIMITER	'%'

/*
 * Set the port number in an address.  Be agnostic about the address
 * family.
 */
static inline void nfs_set_port(struct sockaddr *sap, unsigned short port)
{
	struct sockaddr_in *ap = (struct sockaddr_in *)sap;
	struct sockaddr_in6 *ap6 = (struct sockaddr_in6 *)sap;

	switch (sap->sa_family) {
	case AF_INET:
		ap->sin_port = htons(port);
		break;
	case AF_INET6:
		ap6->sin6_port = htons(port);
		break;
	}
}
Commit	Line	Data
f7b422b1 DH	1	/*
	2	* NFS internal definitions
	3	*/
	4
eedc020e	5	#include "nfs4_fs.h"
f7b422b1	6	#include <linux/mount.h>
f9c3a380	7	#include <linux/security.h>
f7b422b1	8
08734048 DH	9	#define NFS_MS_MASK (MS_RDONLY\|MS_NOSUID\|MS_NODEV\|MS_NOEXEC\|MS_SYNCHRONOUS)
08734048 DH	10
54ceac45	11	struct nfs_string;
54ceac45 DH	12
	13	/* Maximum number of readahead requests
	14	* FIXME: this should really be a sysctl so that users may tune it to suit
	15	* their needs. People that do NFS over a slow network, might for
	16	* instance want to reduce it to something closer to 1 for improved
	17	* interactive response.
	18	*/
	19	#define NFS_MAX_READAHEAD (RPC_DEF_SLOT_TABLE - 1)
	20
eedc020e AA	21	/*
	22	* Determine if sessions are in use.
	23	*/
	24	static inline int nfs4_has_session(const struct nfs_client *clp)
	25	{
	26	#ifdef CONFIG_NFS_V4_1
	27	if (clp->cl_session)
	28	return 1;
	29	#endif /* CONFIG_NFS_V4_1 */
	30	return 0;
	31	}
	32
f7b422b1 DH	33	struct nfs_clone_mount {
	34	const struct super_block *sb;
	35	const struct dentry *dentry;
	36	struct nfs_fh *fh;
	37	struct nfs_fattr *fattr;
	38	char *hostname;
	39	char *mnt_path;
6677d095 CL	40	struct sockaddr *addr;
6677d095 CL	41	size_t addrlen;
f7b422b1 DH	42	rpc_authflavor_t authflavor;
	43	};
	44
a14017db CL	45	/*
	46	* Note: RFC 1813 doesn't limit the number of auth flavors that
	47	* a server can return, so make something up.
	48	*/
	49	#define NFS_MAX_SECFLAVORS (12)
	50
6b18eaa0 TT	51	/*
	52	* In-kernel mount arguments
	53	*/
	54	struct nfs_parsed_mount_data {
	55	int flags;
	56	int rsize, wsize;
	57	int timeo, retrans;
	58	int acregmin, acregmax,
	59	acdirmin, acdirmax;
	60	int namlen;
b797cac7	61	unsigned int options;
6b18eaa0 TT	62	unsigned int bsize;
	63	unsigned int auth_flavor_len;
	64	rpc_authflavor_t auth_flavors[1];
	65	char *client_address;
3fd5be9e	66	unsigned int minorversion;
08734048	67	char *fscache_uniq;
6b18eaa0 TT	68
6b18eaa0 TT	69	struct {
4c568017 CL	70	struct sockaddr_storage address;
4c568017 CL	71	size_t addrlen;
6b18eaa0	72	char *hostname;
78fa701f	73	u32 version;
6b18eaa0	74	unsigned short port;
78fa701f	75	unsigned short protocol;
6b18eaa0 TT	76	} mount_server;
	77
	78	struct {
4c568017 CL	79	struct sockaddr_storage address;
4c568017 CL	80	size_t addrlen;
6b18eaa0 TT	81	char *hostname;
6b18eaa0 TT	82	char *export_path;
f22d6d79	83	unsigned short port;
78fa701f	84	unsigned short protocol;
6b18eaa0	85	} nfs_server;
f9c3a380 EP	86
f9c3a380 EP	87	struct security_mnt_opts lsm_opts;
6b18eaa0 TT	88	};
6b18eaa0 TT	89
146ec944	90	/* mount_clnt.c */
c5d120f8 CL	91	struct nfs_mount_request {
	92	struct sockaddr *sap;
	93	size_t salen;
	94	char *hostname;
	95	char *dirpath;
	96	u32 version;
	97	unsigned short protocol;
	98	struct nfs_fh *fh;
50a737f8	99	int noresvport;
8e02f6b9 CL	100	unsigned int *auth_flav_len;
8e02f6b9 CL	101	rpc_authflavor_t *auth_flavs;
c5d120f8 CL	102	};
	103
	104	extern int nfs_mount(struct nfs_mount_request *info);
0b524123	105	extern void nfs_umount(const struct nfs_mount_request *info);
146ec944	106
24c8dbbb	107	/* client.c */
54ceac45 DH	108	extern struct rpc_program nfs_program;
54ceac45 DH	109
24c8dbbb	110	extern void nfs_put_client(struct nfs_client *);
ff052645	111	extern struct nfs_client nfs_find_client(const struct sockaddr , u32);
3fbd67ad	112	extern struct nfs_client nfs_find_client_next(struct nfs_client );
2283f8d6 TT	113	extern struct nfs_server *nfs_create_server(
	114	const struct nfs_parsed_mount_data *,
	115	struct nfs_fh *);
91ea40b9 TT	116	extern struct nfs_server *nfs4_create_server(
	117	const struct nfs_parsed_mount_data *,
	118	struct nfs_fh *);
54ceac45 DH	119	extern struct nfs_server nfs4_create_referral_server(struct nfs_clone_mount ,
	120	struct nfs_fh *);
	121	extern void nfs_free_server(struct nfs_server *server);
	122	extern struct nfs_server nfs_clone_server(struct nfs_server ,
	123	struct nfs_fh *,
	124	struct nfs_fattr *);
76db6d95	125	extern void nfs_mark_client_ready(struct nfs_client *clp, int state);
008f55d0	126	extern int nfs4_check_client_ready(struct nfs_client *clp);
6aaca566 DH	127	#ifdef CONFIG_PROC_FS
	128	extern int __init nfs_fs_proc_init(void);
	129	extern void nfs_fs_proc_exit(void);
	130	#else
	131	static inline int nfs_fs_proc_init(void)
	132	{
	133	return 0;
	134	}
	135	static inline void nfs_fs_proc_exit(void)
	136	{
	137	}
	138	#endif
24c8dbbb	139
7d4e2747	140	/* nfs4namespace.c */
f7b422b1 DH	141	#ifdef CONFIG_NFS_V4
	142	extern struct vfsmount nfs_do_refmount(const struct vfsmount mnt_parent, struct dentry *dentry);
	143	#else
	144	static inline
	145	struct vfsmount nfs_do_refmount(const struct vfsmount mnt_parent, struct dentry *dentry)
	146	{
	147	return ERR_PTR(-ENOENT);
	148	}
	149	#endif
	150
	151	/* callback_xdr.c */
	152	extern struct svc_version nfs4_callback_version1;
	153
	154	/* pagelist.c */
	155	extern int __init nfs_init_nfspagecache(void);
266bee88	156	extern void nfs_destroy_nfspagecache(void);
f7b422b1	157	extern int __init nfs_init_readpagecache(void);
266bee88	158	extern void nfs_destroy_readpagecache(void);
f7b422b1	159	extern int __init nfs_init_writepagecache(void);
266bee88	160	extern void nfs_destroy_writepagecache(void);
f7b422b1	161
f7b422b1	162	extern int __init nfs_init_directcache(void);
266bee88	163	extern void nfs_destroy_directcache(void);
f7b422b1 DH	164
f7b422b1 DH	165	/* nfs2xdr.c */
7d4e2747	166	extern int nfs_stat_to_errno(int);
f7b422b1	167	extern struct rpc_procinfo nfs_procedures[];
0dbb4c67	168	extern __be32 * nfs_decode_dirent(__be32 , struct nfs_entry , int);
f7b422b1 DH	169
	170	/* nfs3xdr.c */
	171	extern struct rpc_procinfo nfs3_procedures[];
0dbb4c67	172	extern __be32 nfs3_decode_dirent(__be32 , struct nfs_entry *, int);
f7b422b1	173
eedc020e AA	174	/* nfs4proc.c */
	175	static inline void nfs4_restart_rpc(struct rpc_task *task,
	176	const struct nfs_client *clp)
	177	{
	178	#ifdef CONFIG_NFS_V4_1
	179	if (nfs4_has_session(clp) &&
	180	test_bit(NFS4CLNT_SESSION_SETUP, &clp->cl_state)) {
	181	rpc_restart_call_prepare(task);
	182	return;
	183	}
	184	#endif /* CONFIG_NFS_V4_1 */
	185	rpc_restart_call(task);
	186	}
	187
f7b422b1	188	/* nfs4xdr.c */
7d4e2747	189	#ifdef CONFIG_NFS_V4
0dbb4c67	190	extern __be32 nfs4_decode_dirent(__be32 p, struct nfs_entry *entry, int plus);
7d4e2747	191	#endif
f7b422b1 DH	192
f7b422b1 DH	193	/* nfs4proc.c */
d75d5414	194	#ifdef CONFIG_NFS_V4
f7b422b1	195	extern struct rpc_procinfo nfs4_procedures[];
d75d5414	196	#endif
f7b422b1	197
7fe5c398 TM	198	/* proc.c */
	199	void nfs_close_context(struct nfs_open_context *ctx, int is_sync);
	200
979df72e TM	201	/* dir.c */
	202	extern int nfs_access_cache_shrinker(int nr_to_scan, gfp_t gfp_mask);
	203
f7b422b1	204	/* inode.c */
5746006f	205	extern struct workqueue_struct *nfsiod_workqueue;
f7b422b1 DH	206	extern struct inode nfs_alloc_inode(struct super_block sb);
	207	extern void nfs_destroy_inode(struct inode *);
	208	extern int nfs_write_inode(struct inode *,int);
	209	extern void nfs_clear_inode(struct inode *);
	210	#ifdef CONFIG_NFS_V4
	211	extern void nfs4_clear_inode(struct inode *);
	212	#endif
f41f7418	213	void nfs_zap_acl_cache(struct inode *inode);
72cb77f4	214	extern int nfs_wait_bit_killable(void *word);
f7b422b1 DH	215
f7b422b1 DH	216	/* super.c */
ea31a443	217	void nfs_parse_ip_address(char , size_t, struct sockaddr , size_t *);
54ceac45	218	extern struct file_system_type nfs_xdev_fs_type;
f7b422b1	219	#ifdef CONFIG_NFS_V4
54ceac45 DH	220	extern struct file_system_type nfs4_xdev_fs_type;
54ceac45 DH	221	extern struct file_system_type nfs4_referral_fs_type;
f7b422b1	222	#endif
4ebd9ab3	223
f7b422b1	224	extern struct rpc_stat nfs_rpcstat;
4ebd9ab3	225
f7b422b1 DH	226	extern int __init register_nfs_fs(void);
f7b422b1 DH	227	extern void __exit unregister_nfs_fs(void);
1daef0a8 TM	228	extern void nfs_sb_active(struct super_block *sb);
1daef0a8 TM	229	extern void nfs_sb_deactive(struct super_block *sb);
f7b422b1 DH	230
f7b422b1 DH	231	/* namespace.c */
54ceac45 DH	232	extern char nfs_path(const char base,
	233	const struct dentry *droot,
	234	const struct dentry *dentry,
f7b422b1 DH	235	char *buffer, ssize_t buflen);
f7b422b1 DH	236
54ceac45 DH	237	/* getroot.c */
54ceac45 DH	238	extern struct dentry nfs_get_root(struct super_block , struct nfs_fh *);
7d4e2747	239	#ifdef CONFIG_NFS_V4
54ceac45 DH	240	extern struct dentry nfs4_get_root(struct super_block , struct nfs_fh *);
	241
	242	extern int nfs4_path_walk(struct nfs_server *server,
	243	struct nfs_fh *mntfh,
	244	const char *path);
7d4e2747	245	#endif
f7b422b1	246
f11c88af AA	247	/* read.c */
	248	extern void nfs_read_prepare(struct rpc_task task, void calldata);
	249
def6ed7e AA	250	/* write.c */
	251	extern void nfs_write_prepare(struct rpc_task task, void calldata);
	252
cccef3b9 AA	253	/* nfs4proc.c */
	254	extern int _nfs4_call_sync(struct nfs_server *server,
	255	struct rpc_message *msg,
	256	struct nfs4_sequence_args *args,
	257	struct nfs4_sequence_res *res,
	258	int cache_reply);
	259	extern int _nfs4_call_sync_session(struct nfs_server *server,
	260	struct rpc_message *msg,
	261	struct nfs4_sequence_args *args,
	262	struct nfs4_sequence_res *res,
	263	int cache_reply);
	264
13615871 AA	265	#ifdef CONFIG_NFS_V4_1
	266	extern void nfs41_sequence_free_slot(const struct nfs_client *,
	267	struct nfs4_sequence_res *res);
	268	#endif /* CONFIG_NFS_V4_1 */
	269
	270	static inline void nfs4_sequence_free_slot(const struct nfs_client *clp,
	271	struct nfs4_sequence_res *res)
	272	{
	273	#ifdef CONFIG_NFS_V4_1
	274	if (nfs4_has_session(clp))
	275	nfs41_sequence_free_slot(clp, res);
	276	#endif /* CONFIG_NFS_V4_1 */
	277	}
	278
f7b422b1 DH	279	/*
	280	* Determine the device name as a string
	281	*/
	282	static inline char nfs_devname(const struct vfsmount mnt_parent,
54ceac45 DH	283	const struct dentry *dentry,
54ceac45 DH	284	char *buffer, ssize_t buflen)
f7b422b1	285	{
54ceac45 DH	286	return nfs_path(mnt_parent->mnt_devname, mnt_parent->mnt_root,
54ceac45 DH	287	dentry, buffer, buflen);
f7b422b1 DH	288	}
	289
	290	/*
	291	* Determine the actual block size (and log2 thereof)
	292	*/
	293	static inline
	294	unsigned long nfs_block_bits(unsigned long bsize, unsigned char *nrbitsp)
	295	{
	296	/* make sure blocksize is a power of two */
	297	if ((bsize & (bsize - 1)) \|\| nrbitsp) {
	298	unsigned char nrbits;
	299
	300	for (nrbits = 31; nrbits && !(bsize & (1 << nrbits)); nrbits--)
	301	;
	302	bsize = 1 << nrbits;
	303	if (nrbitsp)
	304	*nrbitsp = nrbits;
	305	}
	306
	307	return bsize;
	308	}
	309
	310	/*
	311	* Calculate the number of 512byte blocks used.
	312	*/
9eaa67c6	313	static inline blkcnt_t nfs_calc_block_size(u64 tsize)
f7b422b1	314	{
9eaa67c6	315	blkcnt_t used = (tsize + 511) >> 9;
f7b422b1 DH	316	return (used > ULONG_MAX) ? ULONG_MAX : used;
	317	}
	318
	319	/*
	320	* Compute and set NFS server blocksize
	321	*/
	322	static inline
	323	unsigned long nfs_block_size(unsigned long bsize, unsigned char *nrbitsp)
	324	{
	325	if (bsize < NFS_MIN_FILE_IO_SIZE)
	326	bsize = NFS_DEF_FILE_IO_SIZE;
	327	else if (bsize >= NFS_MAX_FILE_IO_SIZE)
	328	bsize = NFS_MAX_FILE_IO_SIZE;
	329
	330	return nfs_block_bits(bsize, nrbitsp);
	331	}
	332
	333	/*
	334	* Determine the maximum file size for a superblock
	335	*/
	336	static inline
	337	void nfs_super_set_maxbytes(struct super_block *sb, __u64 maxfilesize)
	338	{
	339	sb->s_maxbytes = (loff_t)maxfilesize;
	340	if (sb->s_maxbytes > MAX_LFS_FILESIZE \|\| sb->s_maxbytes <= 0)
	341	sb->s_maxbytes = MAX_LFS_FILESIZE;
	342	}
49a70f27 TM	343
	344	/*
	345	* Determine the number of bytes of data the page contains
	346	*/
	347	static inline
	348	unsigned int nfs_page_length(struct page *page)
	349	{
	350	loff_t i_size = i_size_read(page->mapping->host);
	351
	352	if (i_size > 0) {
	353	pgoff_t end_index = (i_size - 1) >> PAGE_CACHE_SHIFT;
	354	if (page->index < end_index)
	355	return PAGE_CACHE_SIZE;
	356	if (page->index == end_index)
	357	return ((i_size - 1) & ~PAGE_CACHE_MASK) + 1;
	358	}
	359	return 0;
	360	}
8d5658c9 TM	361
	362	/*
	363	* Determine the number of pages in an array of length 'len' and
	364	* with a base offset of 'base'
	365	*/
	366	static inline
	367	unsigned int nfs_page_array_len(unsigned int base, size_t len)
	368	{
	369	return ((unsigned long)len + (unsigned long)base +
	370	PAGE_SIZE - 1) >> PAGE_SHIFT;
	371	}
	372
ea31a443	373	#define IPV6_SCOPE_DELIMITER '%'
f0c92925 BF	374
	375	/*
	376	* Set the port number in an address. Be agnostic about the address
	377	* family.
	378	*/
	379	static inline void nfs_set_port(struct sockaddr *sap, unsigned short port)
	380	{
456018d7 BF	381	struct sockaddr_in ap = (struct sockaddr_in )sap;
	382	struct sockaddr_in6 ap6 = (struct sockaddr_in6 )sap;
	383
f0c92925	384	switch (sap->sa_family) {
456018d7 BF	385	case AF_INET:
	386	ap->sin_port = htons(port);
	387	break;
	388	case AF_INET6:
	389	ap6->sin6_port = htons(port);
	390	break;
f0c92925 BF	391	}
f0c92925 BF	392	}