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 __be32 nfserrno (int errno); 64 int nfsd_cross_mnt(struct svc_rqst *rqstp, struct dentry **dpp, 65 struct svc_export **expp); 66 __be32 nfsd_lookup(struct svc_rqst *, struct svc_fh *, 67 const char *, unsigned int, struct svc_fh *); 68 __be32 nfsd_lookup_dentry(struct svc_rqst *, struct svc_fh *, 69 const char *, unsigned int, 70 struct svc_export **, struct dentry **); 71 __be32 nfsd_setattr(struct svc_rqst *, struct svc_fh *, 72 struct nfsd_attrs *, int, time64_t); 73 int nfsd_mountpoint(struct dentry *, struct svc_export *); 74 #ifdef CONFIG_NFSD_V4 75 __be32 nfsd4_vfs_fallocate(struct svc_rqst *, struct svc_fh *, 76 struct file *, loff_t, loff_t, int); 77 __be32 nfsd4_clone_file_range(struct svc_rqst *rqstp, 78 struct nfsd_file *nf_src, u64 src_pos, 79 struct nfsd_file *nf_dst, u64 dst_pos, 80 u64 count, bool sync); 81 #endif /* CONFIG_NFSD_V4 */ 82 __be32 nfsd_create_locked(struct svc_rqst *, struct svc_fh *, 83 struct nfsd_attrs *attrs, int type, dev_t rdev, 84 struct svc_fh *res); 85 __be32 nfsd_create(struct svc_rqst *, struct svc_fh *, 86 char *name, int len, struct nfsd_attrs *attrs, 87 int type, dev_t rdev, struct svc_fh *res); 88 __be32 nfsd_access(struct svc_rqst *, struct svc_fh *, u32 *, u32 *); 89 __be32 nfsd_create_setattr(struct svc_rqst *rqstp, struct svc_fh *fhp, 90 struct svc_fh *resfhp, struct nfsd_attrs *iap); 91 __be32 nfsd_commit(struct svc_rqst *rqst, struct svc_fh *fhp, 92 struct nfsd_file *nf, u64 offset, u32 count, 93 __be32 *verf); 94 #ifdef CONFIG_NFSD_V4 95 __be32 nfsd_getxattr(struct svc_rqst *rqstp, struct svc_fh *fhp, 96 char *name, void **bufp, int *lenp); 97 __be32 nfsd_listxattr(struct svc_rqst *rqstp, struct svc_fh *fhp, 98 char **bufp, int *lenp); 99 __be32 nfsd_removexattr(struct svc_rqst *rqstp, struct svc_fh *fhp, 100 char *name); 101 __be32 nfsd_setxattr(struct svc_rqst *rqstp, struct svc_fh *fhp, 102 char *name, void *buf, u32 len, u32 flags); 103 #endif 104 int nfsd_open_break_lease(struct inode *, int); 105 __be32 nfsd_open(struct svc_rqst *, struct svc_fh *, umode_t, 106 int, struct file **); 107 int nfsd_open_verified(struct svc_rqst *rqstp, struct svc_fh *fhp, 108 int may_flags, struct file **filp); 109 __be32 nfsd_splice_read(struct svc_rqst *rqstp, struct svc_fh *fhp, 110 struct file *file, loff_t offset, 111 unsigned long *count, 112 u32 *eof); 113 __be32 nfsd_iter_read(struct svc_rqst *rqstp, struct svc_fh *fhp, 114 struct file *file, loff_t offset, 115 unsigned long *count, unsigned int base, 116 u32 *eof); 117 __be32 nfsd_read(struct svc_rqst *rqstp, struct svc_fh *fhp, 118 loff_t offset, unsigned long *count, 119 u32 *eof); 120 __be32 nfsd_write(struct svc_rqst *, struct svc_fh *, loff_t, 121 struct kvec *, int, unsigned long *, 122 int stable, __be32 *verf); 123 __be32 nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp, 124 struct nfsd_file *nf, loff_t offset, 125 struct kvec *vec, int vlen, unsigned long *cnt, 126 int stable, __be32 *verf); 127 __be32 nfsd_readlink(struct svc_rqst *, struct svc_fh *, 128 char *, int *); 129 __be32 nfsd_symlink(struct svc_rqst *, struct svc_fh *, 130 char *name, int len, char *path, 131 struct nfsd_attrs *attrs, 132 struct svc_fh *res); 133 __be32 nfsd_link(struct svc_rqst *, struct svc_fh *, 134 char *, int, struct svc_fh *); 135 ssize_t nfsd_copy_file_range(struct file *, u64, 136 struct file *, u64, u64); 137 __be32 nfsd_rename(struct svc_rqst *, 138 struct svc_fh *, char *, int, 139 struct svc_fh *, char *, int); 140 __be32 nfsd_unlink(struct svc_rqst *, struct svc_fh *, int type, 141 char *name, int len); 142 __be32 nfsd_readdir(struct svc_rqst *, struct svc_fh *, 143 loff_t *, struct readdir_cd *, nfsd_filldir_t); 144 __be32 nfsd_statfs(struct svc_rqst *, struct svc_fh *, 145 struct kstatfs *, int access); 146 147 __be32 nfsd_permission(struct svc_rqst *, struct svc_export *, 148 struct dentry *, int); 149 150 static inline int fh_want_write(struct svc_fh *fh) 151 { 152 int ret; 153 154 if (fh->fh_want_write) 155 return 0; 156 ret = mnt_want_write(fh->fh_export->ex_path.mnt); 157 if (!ret) 158 fh->fh_want_write = true; 159 return ret; 160 } 161 162 static inline void fh_drop_write(struct svc_fh *fh) 163 { 164 if (fh->fh_want_write) { 165 fh->fh_want_write = false; 166 mnt_drop_write(fh->fh_export->ex_path.mnt); 167 } 168 } 169 170 static inline __be32 fh_getattr(const struct svc_fh *fh, struct kstat *stat) 171 { 172 u32 request_mask = STATX_BASIC_STATS; 173 struct path p = {.mnt = fh->fh_export->ex_path.mnt, 174 .dentry = fh->fh_dentry}; 175 176 if (fh->fh_maxsize == NFS4_FHSIZE) 177 request_mask |= (STATX_BTIME | STATX_CHANGE_COOKIE); 178 179 return nfserrno(vfs_getattr(&p, stat, request_mask, 180 AT_STATX_SYNC_AS_STAT)); 181 } 182 183 #endif /* LINUX_NFSD_VFS_H */ 184