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 <linux/fs.h> 10 #include <linux/posix_acl.h> 11 #include "nfsfh.h" 12 #include "nfsd.h" 13 14 /* 15 * Flags for nfsd_permission 16 */ 17 #define NFSD_MAY_NOP 0 18 #define NFSD_MAY_EXEC 0x001 /* == MAY_EXEC */ 19 #define NFSD_MAY_WRITE 0x002 /* == MAY_WRITE */ 20 #define NFSD_MAY_READ 0x004 /* == MAY_READ */ 21 #define NFSD_MAY_SATTR 0x008 22 #define NFSD_MAY_TRUNC 0x010 23 #define NFSD_MAY_LOCK 0x020 24 #define NFSD_MAY_MASK 0x03f 25 26 /* extra hints to permission and open routines: */ 27 #define NFSD_MAY_OWNER_OVERRIDE 0x040 28 #define NFSD_MAY_LOCAL_ACCESS 0x080 /* for device special files */ 29 #define NFSD_MAY_BYPASS_GSS_ON_ROOT 0x100 30 #define NFSD_MAY_NOT_BREAK_LEASE 0x200 31 #define NFSD_MAY_BYPASS_GSS 0x400 32 #define NFSD_MAY_READ_IF_EXEC 0x800 33 34 #define NFSD_MAY_64BIT_COOKIE 0x1000 /* 64 bit readdir cookies for >= NFSv3 */ 35 36 #define NFSD_MAY_CREATE (NFSD_MAY_EXEC|NFSD_MAY_WRITE) 37 #define NFSD_MAY_REMOVE (NFSD_MAY_EXEC|NFSD_MAY_WRITE|NFSD_MAY_TRUNC) 38 39 struct nfsd_file; 40 41 /* 42 * Callback function for readdir 43 */ 44 typedef int (*nfsd_filldir_t)(void *, const char *, int, loff_t, u64, unsigned); 45 46 /* nfsd/vfs.c */ 47 struct nfsd_attrs { 48 struct iattr *na_iattr; /* input */ 49 struct xdr_netobj *na_seclabel; /* input */ 50 struct posix_acl *na_pacl; /* input */ 51 struct posix_acl *na_dpacl; /* input */ 52 53 int na_labelerr; /* output */ 54 int na_aclerr; /* output */ 55 }; 56 57 static inline void nfsd_attrs_free(struct nfsd_attrs *attrs) 58 { 59 posix_acl_release(attrs->na_pacl); 60 posix_acl_release(attrs->na_dpacl); 61 } 62 63 static inline bool nfsd_attrs_valid(struct nfsd_attrs *attrs) 64 { 65 struct iattr *iap = attrs->na_iattr; 66 67 return (iap->ia_valid || (attrs->na_seclabel && 68 attrs->na_seclabel->len)); 69 } 70 71 __be32 nfserrno (int errno); 72 int nfsd_cross_mnt(struct svc_rqst *rqstp, struct dentry **dpp, 73 struct svc_export **expp); 74 __be32 nfsd_lookup(struct svc_rqst *, struct svc_fh *, 75 const char *, unsigned int, struct svc_fh *); 76 __be32 nfsd_lookup_dentry(struct svc_rqst *, struct svc_fh *, 77 const char *, unsigned int, 78 struct svc_export **, struct dentry **); 79 __be32 nfsd_setattr(struct svc_rqst *, struct svc_fh *, 80 struct nfsd_attrs *, const struct timespec64 *); 81 int nfsd_mountpoint(struct dentry *, struct svc_export *); 82 #ifdef CONFIG_NFSD_V4 83 __be32 nfsd4_vfs_fallocate(struct svc_rqst *, struct svc_fh *, 84 struct file *, loff_t, loff_t, int); 85 __be32 nfsd4_clone_file_range(struct svc_rqst *rqstp, 86 struct nfsd_file *nf_src, u64 src_pos, 87 struct nfsd_file *nf_dst, u64 dst_pos, 88 u64 count, bool sync); 89 #endif /* CONFIG_NFSD_V4 */ 90 __be32 nfsd_create_locked(struct svc_rqst *, struct svc_fh *, 91 struct nfsd_attrs *attrs, int type, dev_t rdev, 92 struct svc_fh *res); 93 __be32 nfsd_create(struct svc_rqst *, struct svc_fh *, 94 char *name, int len, struct nfsd_attrs *attrs, 95 int type, dev_t rdev, struct svc_fh *res); 96 __be32 nfsd_access(struct svc_rqst *, struct svc_fh *, u32 *, u32 *); 97 __be32 nfsd_create_setattr(struct svc_rqst *rqstp, struct svc_fh *fhp, 98 struct svc_fh *resfhp, struct nfsd_attrs *iap); 99 __be32 nfsd_commit(struct svc_rqst *rqst, struct svc_fh *fhp, 100 struct nfsd_file *nf, u64 offset, u32 count, 101 __be32 *verf); 102 #ifdef CONFIG_NFSD_V4 103 __be32 nfsd_getxattr(struct svc_rqst *rqstp, struct svc_fh *fhp, 104 char *name, void **bufp, int *lenp); 105 __be32 nfsd_listxattr(struct svc_rqst *rqstp, struct svc_fh *fhp, 106 char **bufp, int *lenp); 107 __be32 nfsd_removexattr(struct svc_rqst *rqstp, struct svc_fh *fhp, 108 char *name); 109 __be32 nfsd_setxattr(struct svc_rqst *rqstp, struct svc_fh *fhp, 110 char *name, void *buf, u32 len, u32 flags); 111 #endif 112 int nfsd_open_break_lease(struct inode *, int); 113 __be32 nfsd_open(struct svc_rqst *, struct svc_fh *, umode_t, 114 int, struct file **); 115 int nfsd_open_verified(struct svc_rqst *rqstp, struct svc_fh *fhp, 116 int may_flags, struct file **filp); 117 __be32 nfsd_splice_read(struct svc_rqst *rqstp, struct svc_fh *fhp, 118 struct file *file, loff_t offset, 119 unsigned long *count, 120 u32 *eof); 121 __be32 nfsd_iter_read(struct svc_rqst *rqstp, struct svc_fh *fhp, 122 struct file *file, loff_t offset, 123 unsigned long *count, unsigned int base, 124 u32 *eof); 125 bool nfsd_read_splice_ok(struct svc_rqst *rqstp); 126 __be32 nfsd_read(struct svc_rqst *rqstp, struct svc_fh *fhp, 127 loff_t offset, unsigned long *count, 128 u32 *eof); 129 __be32 nfsd_write(struct svc_rqst *, struct svc_fh *, loff_t, 130 struct kvec *, int, unsigned long *, 131 int stable, __be32 *verf); 132 __be32 nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp, 133 struct nfsd_file *nf, loff_t offset, 134 struct kvec *vec, int vlen, unsigned long *cnt, 135 int stable, __be32 *verf); 136 __be32 nfsd_readlink(struct svc_rqst *, struct svc_fh *, 137 char *, int *); 138 __be32 nfsd_symlink(struct svc_rqst *, struct svc_fh *, 139 char *name, int len, char *path, 140 struct nfsd_attrs *attrs, 141 struct svc_fh *res); 142 __be32 nfsd_link(struct svc_rqst *, struct svc_fh *, 143 char *, int, struct svc_fh *); 144 ssize_t nfsd_copy_file_range(struct file *, u64, 145 struct file *, u64, u64); 146 __be32 nfsd_rename(struct svc_rqst *, 147 struct svc_fh *, char *, int, 148 struct svc_fh *, char *, int); 149 __be32 nfsd_unlink(struct svc_rqst *, struct svc_fh *, int type, 150 char *name, int len); 151 __be32 nfsd_readdir(struct svc_rqst *, struct svc_fh *, 152 loff_t *, struct readdir_cd *, nfsd_filldir_t); 153 __be32 nfsd_statfs(struct svc_rqst *, struct svc_fh *, 154 struct kstatfs *, int access); 155 156 __be32 nfsd_permission(struct svc_rqst *, struct svc_export *, 157 struct dentry *, int); 158 159 void nfsd_filp_close(struct file *fp); 160 161 static inline int fh_want_write(struct svc_fh *fh) 162 { 163 int ret; 164 165 if (fh->fh_want_write) 166 return 0; 167 ret = mnt_want_write(fh->fh_export->ex_path.mnt); 168 if (!ret) 169 fh->fh_want_write = true; 170 return ret; 171 } 172 173 static inline void fh_drop_write(struct svc_fh *fh) 174 { 175 if (fh->fh_want_write) { 176 fh->fh_want_write = false; 177 mnt_drop_write(fh->fh_export->ex_path.mnt); 178 } 179 } 180 181 static inline __be32 fh_getattr(const struct svc_fh *fh, struct kstat *stat) 182 { 183 u32 request_mask = STATX_BASIC_STATS; 184 struct path p = {.mnt = fh->fh_export->ex_path.mnt, 185 .dentry = fh->fh_dentry}; 186 187 if (fh->fh_maxsize == NFS4_FHSIZE) 188 request_mask |= (STATX_BTIME | STATX_CHANGE_COOKIE); 189 190 return nfserrno(vfs_getattr(&p, stat, request_mask, 191 AT_STATX_SYNC_AS_STAT)); 192 } 193 194 #endif /* LINUX_NFSD_VFS_H */ 195