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 /* 38 * Callback function for readdir 39 */ 40 typedef int (*nfsd_filldir_t)(void *, const char *, int, loff_t, u64, unsigned); 41 42 /* nfsd/vfs.c */ 43 int nfsd_cross_mnt(struct svc_rqst *rqstp, struct dentry **dpp, 44 struct svc_export **expp); 45 __be32 nfsd_lookup(struct svc_rqst *, struct svc_fh *, 46 const char *, unsigned int, struct svc_fh *); 47 __be32 nfsd_lookup_dentry(struct svc_rqst *, struct svc_fh *, 48 const char *, unsigned int, 49 struct svc_export **, struct dentry **); 50 __be32 nfsd_setattr(struct svc_rqst *, struct svc_fh *, 51 struct iattr *, int, time_t); 52 int nfsd_mountpoint(struct dentry *, struct svc_export *); 53 #ifdef CONFIG_NFSD_V4 54 __be32 nfsd4_set_nfs4_label(struct svc_rqst *, struct svc_fh *, 55 struct xdr_netobj *); 56 __be32 nfsd4_vfs_fallocate(struct svc_rqst *, struct svc_fh *, 57 struct file *, loff_t, loff_t, int); 58 __be32 nfsd4_clone_file_range(struct file *, u64, struct file *, 59 u64, u64, bool); 60 #endif /* CONFIG_NFSD_V4 */ 61 __be32 nfsd_create_locked(struct svc_rqst *, struct svc_fh *, 62 char *name, int len, struct iattr *attrs, 63 int type, dev_t rdev, struct svc_fh *res); 64 __be32 nfsd_create(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 #ifdef CONFIG_NFSD_V3 68 __be32 nfsd_access(struct svc_rqst *, struct svc_fh *, u32 *, u32 *); 69 __be32 do_nfsd_create(struct svc_rqst *, struct svc_fh *, 70 char *name, int len, struct iattr *attrs, 71 struct svc_fh *res, int createmode, 72 u32 *verifier, bool *truncp, bool *created); 73 __be32 nfsd_commit(struct svc_rqst *, struct svc_fh *, 74 loff_t, unsigned long); 75 #endif /* CONFIG_NFSD_V3 */ 76 int nfsd_open_break_lease(struct inode *, int); 77 __be32 nfsd_open(struct svc_rqst *, struct svc_fh *, umode_t, 78 int, struct file **); 79 __be32 nfsd_open_verified(struct svc_rqst *, struct svc_fh *, umode_t, 80 int, struct file **); 81 __be32 nfsd_splice_read(struct svc_rqst *rqstp, struct svc_fh *fhp, 82 struct file *file, loff_t offset, 83 unsigned long *count, 84 u32 *eof); 85 __be32 nfsd_readv(struct svc_rqst *rqstp, struct svc_fh *fhp, 86 struct file *file, loff_t offset, 87 struct kvec *vec, int vlen, 88 unsigned long *count, 89 u32 *eof); 90 __be32 nfsd_read(struct svc_rqst *, struct svc_fh *, 91 loff_t, struct kvec *, int, unsigned long *, 92 u32 *eof); 93 __be32 nfsd_write(struct svc_rqst *, struct svc_fh *, loff_t, 94 struct kvec *, int, unsigned long *, int); 95 __be32 nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp, 96 struct file *file, loff_t offset, 97 struct kvec *vec, int vlen, unsigned long *cnt, 98 int stable); 99 __be32 nfsd_readlink(struct svc_rqst *, struct svc_fh *, 100 char *, int *); 101 __be32 nfsd_symlink(struct svc_rqst *, struct svc_fh *, 102 char *name, int len, char *path, 103 struct svc_fh *res); 104 __be32 nfsd_link(struct svc_rqst *, struct svc_fh *, 105 char *, int, struct svc_fh *); 106 ssize_t nfsd_copy_file_range(struct file *, u64, 107 struct file *, u64, u64); 108 __be32 nfsd_rename(struct svc_rqst *, 109 struct svc_fh *, char *, int, 110 struct svc_fh *, char *, int); 111 __be32 nfsd_unlink(struct svc_rqst *, struct svc_fh *, int type, 112 char *name, int len); 113 __be32 nfsd_readdir(struct svc_rqst *, struct svc_fh *, 114 loff_t *, struct readdir_cd *, nfsd_filldir_t); 115 __be32 nfsd_statfs(struct svc_rqst *, struct svc_fh *, 116 struct kstatfs *, int access); 117 118 __be32 nfsd_permission(struct svc_rqst *, struct svc_export *, 119 struct dentry *, int); 120 121 static inline int fh_want_write(struct svc_fh *fh) 122 { 123 int ret; 124 125 if (fh->fh_want_write) 126 return 0; 127 ret = mnt_want_write(fh->fh_export->ex_path.mnt); 128 if (!ret) 129 fh->fh_want_write = true; 130 return ret; 131 } 132 133 static inline void fh_drop_write(struct svc_fh *fh) 134 { 135 if (fh->fh_want_write) { 136 fh->fh_want_write = false; 137 mnt_drop_write(fh->fh_export->ex_path.mnt); 138 } 139 } 140 141 static inline __be32 fh_getattr(struct svc_fh *fh, struct kstat *stat) 142 { 143 struct path p = {.mnt = fh->fh_export->ex_path.mnt, 144 .dentry = fh->fh_dentry}; 145 return nfserrno(vfs_getattr(&p, stat, STATX_BASIC_STATS, 146 AT_STATX_SYNC_AS_STAT)); 147 } 148 149 static inline int nfsd_create_is_exclusive(int createmode) 150 { 151 return createmode == NFS3_CREATE_EXCLUSIVE 152 || createmode == NFS4_CREATE_EXCLUSIVE4_1; 153 } 154 155 #endif /* LINUX_NFSD_VFS_H */ 156