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 nfsd_file *nf_src, u64 src_pos, 61 struct nfsd_file *nf_dst, u64 dst_pos, 62 u64 count, bool sync); 63 #endif /* CONFIG_NFSD_V4 */ 64 __be32 nfsd_create_locked(struct svc_rqst *, struct svc_fh *, 65 char *name, int len, struct iattr *attrs, 66 int type, dev_t rdev, struct svc_fh *res); 67 __be32 nfsd_create(struct svc_rqst *, struct svc_fh *, 68 char *name, int len, struct iattr *attrs, 69 int type, dev_t rdev, struct svc_fh *res); 70 #ifdef CONFIG_NFSD_V3 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 *, struct svc_fh *, 77 loff_t, unsigned long, __be32 *verf); 78 #endif /* CONFIG_NFSD_V3 */ 79 #ifdef CONFIG_NFSD_V4 80 __be32 nfsd_getxattr(struct svc_rqst *rqstp, struct svc_fh *fhp, 81 char *name, void **bufp, int *lenp); 82 __be32 nfsd_listxattr(struct svc_rqst *rqstp, struct svc_fh *fhp, 83 char **bufp, int *lenp); 84 __be32 nfsd_removexattr(struct svc_rqst *rqstp, struct svc_fh *fhp, 85 char *name); 86 __be32 nfsd_setxattr(struct svc_rqst *rqstp, struct svc_fh *fhp, 87 char *name, void *buf, u32 len, u32 flags); 88 #endif 89 int nfsd_open_break_lease(struct inode *, int); 90 __be32 nfsd_open(struct svc_rqst *, struct svc_fh *, umode_t, 91 int, struct file **); 92 __be32 nfsd_open_verified(struct svc_rqst *, struct svc_fh *, umode_t, 93 int, struct file **); 94 __be32 nfsd_splice_read(struct svc_rqst *rqstp, struct svc_fh *fhp, 95 struct file *file, loff_t offset, 96 unsigned long *count, 97 u32 *eof); 98 __be32 nfsd_readv(struct svc_rqst *rqstp, struct svc_fh *fhp, 99 struct file *file, loff_t offset, 100 struct kvec *vec, int vlen, 101 unsigned long *count, 102 u32 *eof); 103 __be32 nfsd_read(struct svc_rqst *, struct svc_fh *, 104 loff_t, struct kvec *, int, unsigned long *, 105 u32 *eof); 106 __be32 nfsd_write(struct svc_rqst *, struct svc_fh *, loff_t, 107 struct kvec *, int, unsigned long *, 108 int stable, __be32 *verf); 109 __be32 nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp, 110 struct nfsd_file *nf, loff_t offset, 111 struct kvec *vec, int vlen, unsigned long *cnt, 112 int stable, __be32 *verf); 113 __be32 nfsd_readlink(struct svc_rqst *, struct svc_fh *, 114 char *, int *); 115 __be32 nfsd_symlink(struct svc_rqst *, struct svc_fh *, 116 char *name, int len, char *path, 117 struct svc_fh *res); 118 __be32 nfsd_link(struct svc_rqst *, struct svc_fh *, 119 char *, int, struct svc_fh *); 120 ssize_t nfsd_copy_file_range(struct file *, u64, 121 struct file *, u64, u64); 122 __be32 nfsd_rename(struct svc_rqst *, 123 struct svc_fh *, char *, int, 124 struct svc_fh *, char *, int); 125 __be32 nfsd_unlink(struct svc_rqst *, struct svc_fh *, int type, 126 char *name, int len); 127 __be32 nfsd_readdir(struct svc_rqst *, struct svc_fh *, 128 loff_t *, struct readdir_cd *, nfsd_filldir_t); 129 __be32 nfsd_statfs(struct svc_rqst *, struct svc_fh *, 130 struct kstatfs *, int access); 131 132 __be32 nfsd_permission(struct svc_rqst *, struct svc_export *, 133 struct dentry *, int); 134 135 static inline int fh_want_write(struct svc_fh *fh) 136 { 137 int ret; 138 139 if (fh->fh_want_write) 140 return 0; 141 ret = mnt_want_write(fh->fh_export->ex_path.mnt); 142 if (!ret) 143 fh->fh_want_write = true; 144 return ret; 145 } 146 147 static inline void fh_drop_write(struct svc_fh *fh) 148 { 149 if (fh->fh_want_write) { 150 fh->fh_want_write = false; 151 mnt_drop_write(fh->fh_export->ex_path.mnt); 152 } 153 } 154 155 static inline __be32 fh_getattr(const struct svc_fh *fh, struct kstat *stat) 156 { 157 struct path p = {.mnt = fh->fh_export->ex_path.mnt, 158 .dentry = fh->fh_dentry}; 159 return nfserrno(vfs_getattr(&p, stat, STATX_BASIC_STATS, 160 AT_STATX_SYNC_AS_STAT)); 161 } 162 163 static inline int nfsd_create_is_exclusive(int createmode) 164 { 165 return createmode == NFS3_CREATE_EXCLUSIVE 166 || createmode == NFS4_CREATE_EXCLUSIVE4_1; 167 } 168 169 #endif /* LINUX_NFSD_VFS_H */ 170