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