vfs.h (5722B)
1/* SPDX-License-Identifier: GPL-2.0 */ 2/* 3 * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de> 4 */ 5 6#ifndef LINUX_NFSD_VFS_H 7#define LINUX_NFSD_VFS_H 8 9#include "nfsfh.h" 10#include "nfsd.h" 11 12/* 13 * Flags for nfsd_permission 14 */ 15#define NFSD_MAY_NOP 0 16#define NFSD_MAY_EXEC 0x001 /* == MAY_EXEC */ 17#define NFSD_MAY_WRITE 0x002 /* == MAY_WRITE */ 18#define NFSD_MAY_READ 0x004 /* == MAY_READ */ 19#define NFSD_MAY_SATTR 0x008 20#define NFSD_MAY_TRUNC 0x010 21#define NFSD_MAY_LOCK 0x020 22#define NFSD_MAY_MASK 0x03f 23 24/* extra hints to permission and open routines: */ 25#define NFSD_MAY_OWNER_OVERRIDE 0x040 26#define NFSD_MAY_LOCAL_ACCESS 0x080 /* for device special files */ 27#define NFSD_MAY_BYPASS_GSS_ON_ROOT 0x100 28#define NFSD_MAY_NOT_BREAK_LEASE 0x200 29#define NFSD_MAY_BYPASS_GSS 0x400 30#define NFSD_MAY_READ_IF_EXEC 0x800 31 32#define NFSD_MAY_64BIT_COOKIE 0x1000 /* 64 bit readdir cookies for >= NFSv3 */ 33 34#define NFSD_MAY_CREATE (NFSD_MAY_EXEC|NFSD_MAY_WRITE) 35#define NFSD_MAY_REMOVE (NFSD_MAY_EXEC|NFSD_MAY_WRITE|NFSD_MAY_TRUNC) 36 37struct nfsd_file; 38 39/* 40 * Callback function for readdir 41 */ 42typedef int (*nfsd_filldir_t)(void *, const char *, int, loff_t, u64, unsigned); 43 44/* nfsd/vfs.c */ 45int nfsd_cross_mnt(struct svc_rqst *rqstp, struct dentry **dpp, 46 struct svc_export **expp); 47__be32 nfsd_lookup(struct svc_rqst *, struct svc_fh *, 48 const char *, unsigned int, struct svc_fh *); 49__be32 nfsd_lookup_dentry(struct svc_rqst *, struct svc_fh *, 50 const char *, unsigned int, 51 struct svc_export **, struct dentry **); 52__be32 nfsd_setattr(struct svc_rqst *, struct svc_fh *, 53 struct iattr *, int, time64_t); 54int nfsd_mountpoint(struct dentry *, struct svc_export *); 55#ifdef CONFIG_NFSD_V4 56__be32 nfsd4_set_nfs4_label(struct svc_rqst *, struct svc_fh *, 57 struct xdr_netobj *); 58__be32 nfsd4_vfs_fallocate(struct svc_rqst *, struct svc_fh *, 59 struct file *, loff_t, loff_t, int); 60__be32 nfsd4_clone_file_range(struct svc_rqst *rqstp, 61 struct nfsd_file *nf_src, u64 src_pos, 62 struct nfsd_file *nf_dst, u64 dst_pos, 63 u64 count, bool sync); 64#endif /* CONFIG_NFSD_V4 */ 65__be32 nfsd_create_locked(struct svc_rqst *, struct svc_fh *, 66 char *name, int len, struct iattr *attrs, 67 int type, dev_t rdev, struct svc_fh *res); 68__be32 nfsd_create(struct svc_rqst *, struct svc_fh *, 69 char *name, int len, struct iattr *attrs, 70 int type, dev_t rdev, struct svc_fh *res); 71__be32 nfsd_access(struct svc_rqst *, struct svc_fh *, u32 *, u32 *); 72__be32 nfsd_create_setattr(struct svc_rqst *rqstp, struct svc_fh *fhp, 73 struct svc_fh *resfhp, struct iattr *iap); 74__be32 nfsd_commit(struct svc_rqst *rqst, struct svc_fh *fhp, 75 u64 offset, u32 count, __be32 *verf); 76#ifdef CONFIG_NFSD_V4 77__be32 nfsd_getxattr(struct svc_rqst *rqstp, struct svc_fh *fhp, 78 char *name, void **bufp, int *lenp); 79__be32 nfsd_listxattr(struct svc_rqst *rqstp, struct svc_fh *fhp, 80 char **bufp, int *lenp); 81__be32 nfsd_removexattr(struct svc_rqst *rqstp, struct svc_fh *fhp, 82 char *name); 83__be32 nfsd_setxattr(struct svc_rqst *rqstp, struct svc_fh *fhp, 84 char *name, void *buf, u32 len, u32 flags); 85#endif 86int nfsd_open_break_lease(struct inode *, int); 87__be32 nfsd_open(struct svc_rqst *, struct svc_fh *, umode_t, 88 int, struct file **); 89__be32 nfsd_open_verified(struct svc_rqst *, struct svc_fh *, 90 int, struct file **); 91__be32 nfsd_splice_read(struct svc_rqst *rqstp, struct svc_fh *fhp, 92 struct file *file, loff_t offset, 93 unsigned long *count, 94 u32 *eof); 95__be32 nfsd_readv(struct svc_rqst *rqstp, struct svc_fh *fhp, 96 struct file *file, loff_t offset, 97 struct kvec *vec, int vlen, 98 unsigned long *count, 99 u32 *eof); 100__be32 nfsd_read(struct svc_rqst *, struct svc_fh *, 101 loff_t, struct kvec *, int, unsigned long *, 102 u32 *eof); 103__be32 nfsd_write(struct svc_rqst *, struct svc_fh *, loff_t, 104 struct kvec *, int, unsigned long *, 105 int stable, __be32 *verf); 106__be32 nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp, 107 struct nfsd_file *nf, loff_t offset, 108 struct kvec *vec, int vlen, unsigned long *cnt, 109 int stable, __be32 *verf); 110__be32 nfsd_readlink(struct svc_rqst *, struct svc_fh *, 111 char *, int *); 112__be32 nfsd_symlink(struct svc_rqst *, struct svc_fh *, 113 char *name, int len, char *path, 114 struct svc_fh *res); 115__be32 nfsd_link(struct svc_rqst *, struct svc_fh *, 116 char *, int, struct svc_fh *); 117ssize_t nfsd_copy_file_range(struct file *, u64, 118 struct file *, u64, u64); 119__be32 nfsd_rename(struct svc_rqst *, 120 struct svc_fh *, char *, int, 121 struct svc_fh *, char *, int); 122__be32 nfsd_unlink(struct svc_rqst *, struct svc_fh *, int type, 123 char *name, int len); 124__be32 nfsd_readdir(struct svc_rqst *, struct svc_fh *, 125 loff_t *, struct readdir_cd *, nfsd_filldir_t); 126__be32 nfsd_statfs(struct svc_rqst *, struct svc_fh *, 127 struct kstatfs *, int access); 128 129__be32 nfsd_permission(struct svc_rqst *, struct svc_export *, 130 struct dentry *, int); 131 132static inline int fh_want_write(struct svc_fh *fh) 133{ 134 int ret; 135 136 if (fh->fh_want_write) 137 return 0; 138 ret = mnt_want_write(fh->fh_export->ex_path.mnt); 139 if (!ret) 140 fh->fh_want_write = true; 141 return ret; 142} 143 144static inline void fh_drop_write(struct svc_fh *fh) 145{ 146 if (fh->fh_want_write) { 147 fh->fh_want_write = false; 148 mnt_drop_write(fh->fh_export->ex_path.mnt); 149 } 150} 151 152static inline __be32 fh_getattr(const struct svc_fh *fh, struct kstat *stat) 153{ 154 struct path p = {.mnt = fh->fh_export->ex_path.mnt, 155 .dentry = fh->fh_dentry}; 156 return nfserrno(vfs_getattr(&p, stat, STATX_BASIC_STATS, 157 AT_STATX_SYNC_AS_STAT)); 158} 159 160#endif /* LINUX_NFSD_VFS_H */