[linux-2.6-block.git] / fs / nfsd / vfs.h

/*
 * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
 */

#ifndef LINUX_NFSD_VFS_H
#define LINUX_NFSD_VFS_H

#include "nfsfh.h"
#include "nfsd.h"

/*
 * Flags for nfsd_permission
 */
#define NFSD_MAY_NOP			0
#define NFSD_MAY_EXEC			0x001 /* == MAY_EXEC */
#define NFSD_MAY_WRITE			0x002 /* == MAY_WRITE */
#define NFSD_MAY_READ			0x004 /* == MAY_READ */
#define NFSD_MAY_SATTR			0x008
#define NFSD_MAY_TRUNC			0x010
#define NFSD_MAY_LOCK			0x020
#define NFSD_MAY_MASK			0x03f

/* extra hints to permission and open routines: */
#define NFSD_MAY_OWNER_OVERRIDE		0x040
#define NFSD_MAY_LOCAL_ACCESS		0x080 /* for device special files */
#define NFSD_MAY_BYPASS_GSS_ON_ROOT	0x100
#define NFSD_MAY_NOT_BREAK_LEASE	0x200
#define NFSD_MAY_BYPASS_GSS		0x400
#define NFSD_MAY_READ_IF_EXEC		0x800

#define NFSD_MAY_64BIT_COOKIE		0x1000 /* 64 bit readdir cookies for >= NFSv3 */

#define NFSD_MAY_CREATE		(NFSD_MAY_EXEC|NFSD_MAY_WRITE)
#define NFSD_MAY_REMOVE		(NFSD_MAY_EXEC|NFSD_MAY_WRITE|NFSD_MAY_TRUNC)

/*
 * Callback function for readdir
 */
typedef int (*nfsd_filldir_t)(void *, const char *, int, loff_t, u64, unsigned);

/* nfsd/vfs.c */
int		nfsd_racache_init(int);
void		nfsd_racache_shutdown(void);
int		nfsd_cross_mnt(struct svc_rqst *rqstp, struct dentry **dpp,
		                struct svc_export **expp);
__be32		nfsd_lookup(struct svc_rqst *, struct svc_fh *,
				const char *, unsigned int, struct svc_fh *);
__be32		 nfsd_lookup_dentry(struct svc_rqst *, struct svc_fh *,
				const char *, unsigned int,
				struct svc_export **, struct dentry **);
__be32		nfsd_setattr(struct svc_rqst *, struct svc_fh *,
				struct iattr *, int, time_t);
int nfsd_mountpoint(struct dentry *, struct svc_export *);
#ifdef CONFIG_NFSD_V4
__be32          nfsd4_set_nfs4_label(struct svc_rqst *, struct svc_fh *,
		    struct xdr_netobj *);
__be32		nfsd4_vfs_fallocate(struct svc_rqst *, struct svc_fh *,
				    struct file *, loff_t, loff_t, int);
#endif /* CONFIG_NFSD_V4 */
__be32		nfsd_create(struct svc_rqst *, struct svc_fh *,
				char *name, int len, struct iattr *attrs,
				int type, dev_t rdev, struct svc_fh *res);
#ifdef CONFIG_NFSD_V3
__be32		nfsd_access(struct svc_rqst *, struct svc_fh *, u32 *, u32 *);
__be32		do_nfsd_create(struct svc_rqst *, struct svc_fh *,
				char *name, int len, struct iattr *attrs,
				struct svc_fh *res, int createmode,
				u32 *verifier, bool *truncp, bool *created);
__be32		nfsd_commit(struct svc_rqst *, struct svc_fh *,
				loff_t, unsigned long);
#endif /* CONFIG_NFSD_V3 */
__be32		nfsd_open(struct svc_rqst *, struct svc_fh *, umode_t,
				int, struct file **);
struct raparms;
__be32		nfsd_splice_read(struct svc_rqst *,
				struct file *, loff_t, unsigned long *);
__be32		nfsd_readv(struct file *, loff_t, struct kvec *, int,
				unsigned long *);
__be32 		nfsd_read(struct svc_rqst *, struct svc_fh *,
				loff_t, struct kvec *, int, unsigned long *);
__be32 		nfsd_write(struct svc_rqst *, struct svc_fh *,struct file *,
				loff_t, struct kvec *,int, unsigned long *, int *);
__be32		nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp,
				struct file *file, loff_t offset,
				struct kvec *vec, int vlen, unsigned long *cnt,
				int *stablep);
__be32		nfsd_readlink(struct svc_rqst *, struct svc_fh *,
				char *, int *);
__be32		nfsd_symlink(struct svc_rqst *, struct svc_fh *,
				char *name, int len, char *path,
				struct svc_fh *res);
__be32		nfsd_link(struct svc_rqst *, struct svc_fh *,
				char *, int, struct svc_fh *);
__be32		nfsd_rename(struct svc_rqst *,
				struct svc_fh *, char *, int,
				struct svc_fh *, char *, int);
__be32		nfsd_unlink(struct svc_rqst *, struct svc_fh *, int type,
				char *name, int len);
__be32		nfsd_readdir(struct svc_rqst *, struct svc_fh *,
			     loff_t *, struct readdir_cd *, nfsd_filldir_t);
__be32		nfsd_statfs(struct svc_rqst *, struct svc_fh *,
				struct kstatfs *, int access);

__be32		nfsd_permission(struct svc_rqst *, struct svc_export *,
				struct dentry *, int);

struct raparms *nfsd_init_raparms(struct file *file);
void		nfsd_put_raparams(struct file *file, struct raparms *ra);

static inline int fh_want_write(struct svc_fh *fh)
{
	int ret = mnt_want_write(fh->fh_export->ex_path.mnt);

	if (!ret)
		fh->fh_want_write = true;
	return ret;
}

static inline void fh_drop_write(struct svc_fh *fh)
{
	if (fh->fh_want_write) {
		fh->fh_want_write = false;
		mnt_drop_write(fh->fh_export->ex_path.mnt);
	}
}

static inline __be32 fh_getattr(struct svc_fh *fh, struct kstat *stat)
{
	struct path p = {.mnt = fh->fh_export->ex_path.mnt,
			 .dentry = fh->fh_dentry};
	return nfserrno(vfs_getattr(&p, stat));
}

static inline int nfsd_create_is_exclusive(int createmode)
{
	return createmode == NFS3_CREATE_EXCLUSIVE
	       || createmode == NFS4_CREATE_EXCLUSIVE4_1;
}

#endif /* LINUX_NFSD_VFS_H */
Commit	Line	Data
0a3adade BF	1	/*
	2	* Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
	3	*/
	4
	5	#ifndef LINUX_NFSD_VFS_H
	6	#define LINUX_NFSD_VFS_H
	7
1557aca7	8	#include "nfsfh.h"
3dadecce	9	#include "nfsd.h"
1557aca7	10
0a3adade BF	11	/*
	12	* Flags for nfsd_permission
	13	*/
8e82fa8f BF	14	#define NFSD_MAY_NOP 0
	15	#define NFSD_MAY_EXEC 0x001 /* == MAY_EXEC */
	16	#define NFSD_MAY_WRITE 0x002 /* == MAY_WRITE */
	17	#define NFSD_MAY_READ 0x004 /* == MAY_READ */
	18	#define NFSD_MAY_SATTR 0x008
	19	#define NFSD_MAY_TRUNC 0x010
	20	#define NFSD_MAY_LOCK 0x020
	21	#define NFSD_MAY_MASK 0x03f
aea93397 BF	22
aea93397 BF	23	/* extra hints to permission and open routines: */
8e82fa8f BF	24	#define NFSD_MAY_OWNER_OVERRIDE 0x040
	25	#define NFSD_MAY_LOCAL_ACCESS 0x080 /* for device special files */
	26	#define NFSD_MAY_BYPASS_GSS_ON_ROOT 0x100
	27	#define NFSD_MAY_NOT_BREAK_LEASE 0x200
	28	#define NFSD_MAY_BYPASS_GSS 0x400
	29	#define NFSD_MAY_READ_IF_EXEC 0x800
0a3adade	30
06effdbb BS	31	#define NFSD_MAY_64BIT_COOKIE 0x1000 /* 64 bit readdir cookies for >= NFSv3 */
06effdbb BS	32
0a3adade BF	33	#define NFSD_MAY_CREATE (NFSD_MAY_EXEC\|NFSD_MAY_WRITE)
	34	#define NFSD_MAY_REMOVE (NFSD_MAY_EXEC\|NFSD_MAY_WRITE\|NFSD_MAY_TRUNC)
	35
	36	/*
	37	* Callback function for readdir
	38	*/
ac7576f4	39	typedef int (nfsd_filldir_t)(void , const char *, int, loff_t, u64, unsigned);
0a3adade BF	40
0a3adade BF	41	/* nfsd/vfs.c */
0a3adade BF	42	int nfsd_racache_init(int);
	43	void nfsd_racache_shutdown(void);
	44	int nfsd_cross_mnt(struct svc_rqst rqstp, struct dentry *dpp,
	45	struct svc_export **expp);
	46	__be32 nfsd_lookup(struct svc_rqst , struct svc_fh ,
	47	const char , unsigned int, struct svc_fh );
	48	__be32 nfsd_lookup_dentry(struct svc_rqst , struct svc_fh ,
	49	const char *, unsigned int,
	50	struct svc_export , struct dentry );
	51	__be32 nfsd_setattr(struct svc_rqst , struct svc_fh ,
	52	struct iattr *, int, time_t);
3227fa41	53	int nfsd_mountpoint(struct dentry , struct svc_export );
0a3adade	54	#ifdef CONFIG_NFSD_V4
18032ca0 DQ	55	__be32 nfsd4_set_nfs4_label(struct svc_rqst , struct svc_fh ,
18032ca0 DQ	56	struct xdr_netobj *);
95d871f0 AS	57	__be32 nfsd4_vfs_fallocate(struct svc_rqst , struct svc_fh ,
95d871f0 AS	58	struct file *, loff_t, loff_t, int);
0a3adade BF	59	#endif /* CONFIG_NFSD_V4 */
	60	__be32 nfsd_create(struct svc_rqst , struct svc_fh ,
	61	char name, int len, struct iattr attrs,
	62	int type, dev_t rdev, struct svc_fh *res);
	63	#ifdef CONFIG_NFSD_V3
	64	__be32 nfsd_access(struct svc_rqst , struct svc_fh , u32 , u32 );
ac6721a1	65	__be32 do_nfsd_create(struct svc_rqst , struct svc_fh ,
0a3adade BF	66	char name, int len, struct iattr attrs,
0a3adade BF	67	struct svc_fh *res, int createmode,
856121b2	68	u32 verifier, bool truncp, bool *created);
0a3adade BF	69	__be32 nfsd_commit(struct svc_rqst , struct svc_fh ,
	70	loff_t, unsigned long);
	71	#endif /* CONFIG_NFSD_V3 */
175a4eb7	72	__be32 nfsd_open(struct svc_rqst , struct svc_fh , umode_t,
0a3adade	73	int, struct file **);
dc97618d	74	struct raparms;
e2afc819	75	__be32 nfsd_splice_read(struct svc_rqst *,
dc97618d	76	struct file , loff_t, unsigned long );
e2afc819	77	__be32 nfsd_readv(struct file , loff_t, struct kvec , int,
dc97618d	78	unsigned long *);
039a87ca BF	79	__be32 nfsd_read(struct svc_rqst , struct svc_fh ,
039a87ca BF	80	loff_t, struct kvec , int, unsigned long );
0a3adade BF	81	__be32 nfsd_write(struct svc_rqst , struct svc_fh ,struct file *,
0a3adade BF	82	loff_t, struct kvec ,int, unsigned long , int *);
af90f707 CH	83	__be32 nfsd_vfs_write(struct svc_rqst rqstp, struct svc_fh fhp,
	84	struct file *file, loff_t offset,
	85	struct kvec vec, int vlen, unsigned long cnt,
	86	int *stablep);
0a3adade BF	87	__be32 nfsd_readlink(struct svc_rqst , struct svc_fh ,
	88	char , int );
	89	__be32 nfsd_symlink(struct svc_rqst , struct svc_fh ,
52ee0433	90	char name, int len, char path,
1e444f5b	91	struct svc_fh *res);
0a3adade BF	92	__be32 nfsd_link(struct svc_rqst , struct svc_fh ,
	93	char , int, struct svc_fh );
	94	__be32 nfsd_rename(struct svc_rqst *,
	95	struct svc_fh , char , int,
	96	struct svc_fh , char , int);
0a3adade BF	97	__be32 nfsd_unlink(struct svc_rqst , struct svc_fh , int type,
0a3adade BF	98	char *name, int len);
0a3adade	99	__be32 nfsd_readdir(struct svc_rqst , struct svc_fh ,
ac7576f4	100	loff_t , struct readdir_cd , nfsd_filldir_t);
0a3adade BF	101	__be32 nfsd_statfs(struct svc_rqst , struct svc_fh ,
	102	struct kstatfs *, int access);
	103
0a3adade BF	104	__be32 nfsd_permission(struct svc_rqst , struct svc_export ,
0a3adade BF	105	struct dentry *, int);
0a3adade	106
e749a462 CH	107	struct raparms nfsd_init_raparms(struct file file);
	108	void nfsd_put_raparams(struct file file, struct raparms ra);
	109
bad0dcff AV	110	static inline int fh_want_write(struct svc_fh *fh)
bad0dcff AV	111	{
4a55c101 JK	112	int ret = mnt_want_write(fh->fh_export->ex_path.mnt);
	113
	114	if (!ret)
aaf91ec1	115	fh->fh_want_write = true;
4a55c101	116	return ret;
bad0dcff AV	117	}
	118
	119	static inline void fh_drop_write(struct svc_fh *fh)
	120	{
4a55c101	121	if (fh->fh_want_write) {
aaf91ec1	122	fh->fh_want_write = false;
4a55c101 JK	123	mnt_drop_write(fh->fh_export->ex_path.mnt);
4a55c101 JK	124	}
bad0dcff AV	125	}
bad0dcff AV	126
3dadecce AV	127	static inline __be32 fh_getattr(struct svc_fh fh, struct kstat stat)
	128	{
	129	struct path p = {.mnt = fh->fh_export->ex_path.mnt,
	130	.dentry = fh->fh_dentry};
	131	return nfserrno(vfs_getattr(&p, stat));
	132	}
	133
ead8fb8c KM	134	static inline int nfsd_create_is_exclusive(int createmode)
	135	{
	136	return createmode == NFS3_CREATE_EXCLUSIVE
	137	\|\| createmode == NFS4_CREATE_EXCLUSIVE4_1;
	138	}
	139
0a3adade	140	#endif /* LINUX_NFSD_VFS_H */