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 37 struct nfsd_file; 38 39 /* 40 * Callback function for readdir 41 */ 42 typedef int (*nfsd_filldir_t)(void *, const char *, int, loff_t, u64, unsigned); 43 44 /* nfsd/vfs.c */ 45 int 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); 54 int 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 do_nfsd_create(struct svc_rqst *, struct svc_fh *, 73 char *name, int len, struct iattr *attrs, 74 struct svc_fh *res, int createmode, 75 u32 *verifier, bool *truncp, bool *created); 76 __be32 nfsd_commit(struct svc_rqst *rqst, struct svc_fh *fhp, 77 u64 offset, u32 count, __be32 *verf); 78 #ifdef CONFIG_NFSD_V4 79 __be32 nfsd_getxattr(struct svc_rqst *rqstp, struct svc_fh *fhp, 80 char *name, void **bufp, int *lenp); 81 __be32 nfsd_listxattr(struct svc_rqst *rqstp, struct svc_fh *fhp, 82 char **bufp, int *lenp); 83 __be32 nfsd_removexattr(struct svc_rqst *rqstp, struct svc_fh *fhp, 84 char *name); 85 __be32 nfsd_setxattr(struct svc_rqst *rqstp, struct svc_fh *fhp, 86 char *name, void *buf, u32 len, u32 flags); 87 #endif 88 int nfsd_open_break_lease(struct inode *, int); 89 __be32 nfsd_open(struct svc_rqst *, struct svc_fh *, umode_t, 90 int, struct file **); 91 __be32 nfsd_open_verified(struct svc_rqst *, struct svc_fh *, umode_t, 92 int, struct file **); 93 __be32 nfsd_splice_read(struct svc_rqst *rqstp, struct svc_fh *fhp, 94 struct file *file, loff_t offset, 95 unsigned long *count, 96 u32 *eof); 97 __be32 nfsd_readv(struct svc_rqst *rqstp, struct svc_fh *fhp, 98 struct file *file, loff_t offset, 99 struct kvec *vec, int vlen, 100 unsigned long *count, 101 u32 *eof); 102 __be32 nfsd_read(struct svc_rqst *, struct svc_fh *, 103 loff_t, struct kvec *, int, unsigned long *, 104 u32 *eof); 105 __be32 nfsd_write(struct svc_rqst *, struct svc_fh *, loff_t, 106 struct kvec *, int, unsigned long *, 107 int stable, __be32 *verf); 108 __be32 nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp, 109 struct nfsd_file *nf, loff_t offset, 110 struct kvec *vec, int vlen, unsigned long *cnt, 111 int stable, __be32 *verf); 112 __be32 nfsd_readlink(struct svc_rqst *, struct svc_fh *, 113 char *, int *); 114 __be32 nfsd_symlink(struct svc_rqst *, struct svc_fh *, 115 char *name, int len, char *path, 116 struct svc_fh *res); 117 __be32 nfsd_link(struct svc_rqst *, struct svc_fh *, 118 char *, int, struct svc_fh *); 119 ssize_t nfsd_copy_file_range(struct file *, u64, 120 struct file *, u64, u64); 121 __be32 nfsd_rename(struct svc_rqst *, 122 struct svc_fh *, char *, int, 123 struct svc_fh *, char *, int); 124 __be32 nfsd_unlink(struct svc_rqst *, struct svc_fh *, int type, 125 char *name, int len); 126 __be32 nfsd_readdir(struct svc_rqst *, struct svc_fh *, 127 loff_t *, struct readdir_cd *, nfsd_filldir_t); 128 __be32 nfsd_statfs(struct svc_rqst *, struct svc_fh *, 129 struct kstatfs *, int access); 130 131 __be32 nfsd_permission(struct svc_rqst *, struct svc_export *, 132 struct dentry *, int); 133 134 static inline int fh_want_write(struct svc_fh *fh) 135 { 136 int ret; 137 138 if (fh->fh_want_write) 139 return 0; 140 ret = mnt_want_write(fh->fh_export->ex_path.mnt); 141 if (!ret) 142 fh->fh_want_write = true; 143 return ret; 144 } 145 146 static inline void fh_drop_write(struct svc_fh *fh) 147 { 148 if (fh->fh_want_write) { 149 fh->fh_want_write = false; 150 mnt_drop_write(fh->fh_export->ex_path.mnt); 151 } 152 } 153 154 static inline __be32 fh_getattr(const struct svc_fh *fh, struct kstat *stat) 155 { 156 struct path p = {.mnt = fh->fh_export->ex_path.mnt, 157 .dentry = fh->fh_dentry}; 158 return nfserrno(vfs_getattr(&p, stat, STATX_BASIC_STATS, 159 AT_STATX_SYNC_AS_STAT)); 160 } 161 162 static inline int nfsd_create_is_exclusive(int createmode) 163 { 164 return createmode == NFS3_CREATE_EXCLUSIVE 165 || createmode == NFS4_CREATE_EXCLUSIVE4_1; 166 } 167 168 #endif /* LINUX_NFSD_VFS_H */ 169