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 8#include "nfsfh.h" 9#include "nfsd.h" 10 11/* 12 * Flags for nfsd_permission 13 */ 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 22 23/* extra hints to permission and open routines: */ 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 30 31#define NFSD_MAY_64BIT_COOKIE 0x1000 /* 64 bit readdir cookies for >= NFSv3 */ 32 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 */ 39typedef int (*nfsd_filldir_t)(void *, const char *, int, loff_t, u64, unsigned); 40 41/* nfsd/vfs.c */ 42int nfsd_racache_init(int); 43void nfsd_racache_shutdown(void); 44int 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); 53int nfsd_mountpoint(struct dentry *, struct svc_export *); 54#ifdef CONFIG_NFSD_V4 55__be32 nfsd4_set_nfs4_label(struct svc_rqst *, struct svc_fh *, 56 struct xdr_netobj *); 57__be32 nfsd4_vfs_fallocate(struct svc_rqst *, struct svc_fh *, 58 struct file *, loff_t, loff_t, int); 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 *); 65__be32 do_nfsd_create(struct svc_rqst *, struct svc_fh *, 66 char *name, int len, struct iattr *attrs, 67 struct svc_fh *res, int createmode, 68 u32 *verifier, bool *truncp, bool *created); 69__be32 nfsd_commit(struct svc_rqst *, struct svc_fh *, 70 loff_t, unsigned long); 71#endif /* CONFIG_NFSD_V3 */ 72__be32 nfsd_open(struct svc_rqst *, struct svc_fh *, umode_t, 73 int, struct file **); 74struct raparms; 75__be32 nfsd_splice_read(struct svc_rqst *, 76 struct file *, loff_t, unsigned long *); 77__be32 nfsd_readv(struct file *, loff_t, struct kvec *, int, 78 unsigned long *); 79__be32 nfsd_read(struct svc_rqst *, struct svc_fh *, 80 loff_t, struct kvec *, int, unsigned long *); 81__be32 nfsd_write(struct svc_rqst *, struct svc_fh *,struct file *, 82 loff_t, struct kvec *,int, unsigned long *, int *); 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); 87__be32 nfsd_readlink(struct svc_rqst *, struct svc_fh *, 88 char *, int *); 89__be32 nfsd_symlink(struct svc_rqst *, struct svc_fh *, 90 char *name, int len, char *path, 91 struct svc_fh *res); 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); 97__be32 nfsd_unlink(struct svc_rqst *, struct svc_fh *, int type, 98 char *name, int len); 99__be32 nfsd_readdir(struct svc_rqst *, struct svc_fh *, 100 loff_t *, struct readdir_cd *, nfsd_filldir_t); 101__be32 nfsd_statfs(struct svc_rqst *, struct svc_fh *, 102 struct kstatfs *, int access); 103 104__be32 nfsd_permission(struct svc_rqst *, struct svc_export *, 105 struct dentry *, int); 106 107struct raparms *nfsd_init_raparms(struct file *file); 108void nfsd_put_raparams(struct file *file, struct raparms *ra); 109 110static inline int fh_want_write(struct svc_fh *fh) 111{ 112 int ret = mnt_want_write(fh->fh_export->ex_path.mnt); 113 114 if (!ret) 115 fh->fh_want_write = true; 116 return ret; 117} 118 119static inline void fh_drop_write(struct svc_fh *fh) 120{ 121 if (fh->fh_want_write) { 122 fh->fh_want_write = false; 123 mnt_drop_write(fh->fh_export->ex_path.mnt); 124 } 125} 126 127static 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 134static inline int nfsd_create_is_exclusive(int createmode) 135{ 136 return createmode == NFS3_CREATE_EXCLUSIVE 137 || createmode == NFS4_CREATE_EXCLUSIVE4_1; 138} 139 140#endif /* LINUX_NFSD_VFS_H */ 141