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 #ifdef CONFIG_NFSD_V3 72 __be32 nfsd_access(struct svc_rqst *, struct svc_fh *, u32 *, u32 *); 73 __be32 do_nfsd_create(struct svc_rqst *, struct svc_fh *, 74 char *name, int len, struct iattr *attrs, 75 struct svc_fh *res, int createmode, 76 u32 *verifier, bool *truncp, bool *created); 77 __be32 nfsd_commit(struct svc_rqst *rqst, struct svc_fh *fhp, 78 u64 offset, u32 count, __be32 *verf); 79 #endif /* CONFIG_NFSD_V3 */ 80 #ifdef CONFIG_NFSD_V4 81 __be32 nfsd_getxattr(struct svc_rqst *rqstp, struct svc_fh *fhp, 82 char *name, void **bufp, int *lenp); 83 __be32 nfsd_listxattr(struct svc_rqst *rqstp, struct svc_fh *fhp, 84 char **bufp, int *lenp); 85 __be32 nfsd_removexattr(struct svc_rqst *rqstp, struct svc_fh *fhp, 86 char *name); 87 __be32 nfsd_setxattr(struct svc_rqst *rqstp, struct svc_fh *fhp, 88 char *name, void *buf, u32 len, u32 flags); 89 #endif 90 int nfsd_open_break_lease(struct inode *, int); 91 __be32 nfsd_open(struct svc_rqst *, struct svc_fh *, umode_t, 92 int, struct file **); 93 __be32 nfsd_open_verified(struct svc_rqst *, struct svc_fh *, umode_t, 94 int, struct file **); 95 __be32 nfsd_splice_read(struct svc_rqst *rqstp, struct svc_fh *fhp, 96 struct file *file, loff_t offset, 97 unsigned long *count, 98 u32 *eof); 99 __be32 nfsd_readv(struct svc_rqst *rqstp, struct svc_fh *fhp, 100 struct file *file, loff_t offset, 101 struct kvec *vec, int vlen, 102 unsigned long *count, 103 u32 *eof); 104 __be32 nfsd_read(struct svc_rqst *, struct svc_fh *, 105 loff_t, struct kvec *, int, unsigned long *, 106 u32 *eof); 107 __be32 nfsd_write(struct svc_rqst *, struct svc_fh *, loff_t, 108 struct kvec *, int, unsigned long *, 109 int stable, __be32 *verf); 110 __be32 nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp, 111 struct nfsd_file *nf, loff_t offset, 112 struct kvec *vec, int vlen, unsigned long *cnt, 113 int stable, __be32 *verf); 114 __be32 nfsd_readlink(struct svc_rqst *, struct svc_fh *, 115 char *, int *); 116 __be32 nfsd_symlink(struct svc_rqst *, struct svc_fh *, 117 char *name, int len, char *path, 118 struct svc_fh *res); 119 __be32 nfsd_link(struct svc_rqst *, struct svc_fh *, 120 char *, int, struct svc_fh *); 121 ssize_t nfsd_copy_file_range(struct file *, u64, 122 struct file *, u64, u64); 123 __be32 nfsd_rename(struct svc_rqst *, 124 struct svc_fh *, char *, int, 125 struct svc_fh *, char *, int); 126 __be32 nfsd_unlink(struct svc_rqst *, struct svc_fh *, int type, 127 char *name, int len); 128 __be32 nfsd_readdir(struct svc_rqst *, struct svc_fh *, 129 loff_t *, struct readdir_cd *, nfsd_filldir_t); 130 __be32 nfsd_statfs(struct svc_rqst *, struct svc_fh *, 131 struct kstatfs *, int access); 132 133 __be32 nfsd_permission(struct svc_rqst *, struct svc_export *, 134 struct dentry *, int); 135 136 static inline int fh_want_write(struct svc_fh *fh) 137 { 138 int ret; 139 140 if (fh->fh_want_write) 141 return 0; 142 ret = mnt_want_write(fh->fh_export->ex_path.mnt); 143 if (!ret) 144 fh->fh_want_write = true; 145 return ret; 146 } 147 148 static inline void fh_drop_write(struct svc_fh *fh) 149 { 150 if (fh->fh_want_write) { 151 fh->fh_want_write = false; 152 mnt_drop_write(fh->fh_export->ex_path.mnt); 153 } 154 } 155 156 static inline __be32 fh_getattr(const struct svc_fh *fh, struct kstat *stat) 157 { 158 struct path p = {.mnt = fh->fh_export->ex_path.mnt, 159 .dentry = fh->fh_dentry}; 160 return nfserrno(vfs_getattr(&p, stat, STATX_BASIC_STATS, 161 AT_STATX_SYNC_AS_STAT)); 162 } 163 164 static inline int nfsd_create_is_exclusive(int createmode) 165 { 166 return createmode == NFS3_CREATE_EXCLUSIVE 167 || createmode == NFS4_CREATE_EXCLUSIVE4_1; 168 } 169 170 #endif /* LINUX_NFSD_VFS_H */ 171