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_NLM 0x020 /* request is from lockd */ 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_LOCALIO 0x2000 /* for tracing, reflects when localio used */ 37 38 #define NFSD_MAY_CREATE (NFSD_MAY_EXEC|NFSD_MAY_WRITE) 39 #define NFSD_MAY_REMOVE (NFSD_MAY_EXEC|NFSD_MAY_WRITE|NFSD_MAY_TRUNC) 40 41 struct nfsd_file; 42 43 /* 44 * Callback function for readdir 45 */ 46 typedef int (*nfsd_filldir_t)(void *, const char *, int, loff_t, u64, unsigned); 47 48 /* nfsd/vfs.c */ 49 struct nfsd_attrs { 50 struct iattr *na_iattr; /* input */ 51 struct xdr_netobj *na_seclabel; /* input */ 52 struct posix_acl *na_pacl; /* input */ 53 struct posix_acl *na_dpacl; /* input */ 54 55 int na_labelerr; /* output */ 56 int na_aclerr; /* output */ 57 }; 58 59 static inline void nfsd_attrs_free(struct nfsd_attrs *attrs) 60 { 61 posix_acl_release(attrs->na_pacl); 62 posix_acl_release(attrs->na_dpacl); 63 } 64 65 static inline bool nfsd_attrs_valid(struct nfsd_attrs *attrs) 66 { 67 struct iattr *iap = attrs->na_iattr; 68 69 return (iap->ia_valid || (attrs->na_seclabel && 70 attrs->na_seclabel->len) || 71 attrs->na_pacl || attrs->na_dpacl); 72 } 73 74 __be32 nfserrno (int errno); 75 int nfsd_cross_mnt(struct svc_rqst *rqstp, struct dentry **dpp, 76 struct svc_export **expp); 77 __be32 nfsd_lookup(struct svc_rqst *, struct svc_fh *, 78 const char *, unsigned int, struct svc_fh *); 79 __be32 nfsd_lookup_dentry(struct svc_rqst *, struct svc_fh *, 80 const char *, unsigned int, 81 struct svc_export **, struct dentry **); 82 __be32 nfsd_setattr(struct svc_rqst *, struct svc_fh *, 83 struct nfsd_attrs *, const struct timespec64 *); 84 int nfsd_mountpoint(struct dentry *, struct svc_export *); 85 #ifdef CONFIG_NFSD_V4 86 __be32 nfsd4_vfs_fallocate(struct svc_rqst *, struct svc_fh *, 87 struct file *, loff_t, loff_t, int); 88 __be32 nfsd4_clone_file_range(struct svc_rqst *rqstp, 89 struct nfsd_file *nf_src, u64 src_pos, 90 struct nfsd_file *nf_dst, u64 dst_pos, 91 u64 count, bool sync); 92 #endif /* CONFIG_NFSD_V4 */ 93 __be32 nfsd_create_locked(struct svc_rqst *, struct svc_fh *, 94 struct nfsd_attrs *attrs, int type, dev_t rdev, 95 struct svc_fh *res); 96 __be32 nfsd_create(struct svc_rqst *, struct svc_fh *, 97 char *name, int len, struct nfsd_attrs *attrs, 98 int type, dev_t rdev, struct svc_fh *res); 99 __be32 nfsd_access(struct svc_rqst *, struct svc_fh *, u32 *, u32 *); 100 __be32 nfsd_create_setattr(struct svc_rqst *rqstp, struct svc_fh *fhp, 101 struct svc_fh *resfhp, struct nfsd_attrs *iap); 102 __be32 nfsd_commit(struct svc_rqst *rqst, struct svc_fh *fhp, 103 struct nfsd_file *nf, u64 offset, u32 count, 104 __be32 *verf); 105 #ifdef CONFIG_NFSD_V4 106 __be32 nfsd_getxattr(struct svc_rqst *rqstp, struct svc_fh *fhp, 107 char *name, void **bufp, int *lenp); 108 __be32 nfsd_listxattr(struct svc_rqst *rqstp, struct svc_fh *fhp, 109 char **bufp, int *lenp); 110 __be32 nfsd_removexattr(struct svc_rqst *rqstp, struct svc_fh *fhp, 111 char *name); 112 __be32 nfsd_setxattr(struct svc_rqst *rqstp, struct svc_fh *fhp, 113 char *name, void *buf, u32 len, u32 flags); 114 #endif 115 int nfsd_open_break_lease(struct inode *, int); 116 __be32 nfsd_open(struct svc_rqst *, struct svc_fh *, umode_t, 117 int, struct file **); 118 int nfsd_open_verified(struct svc_fh *fhp, umode_t type, int may_flags, 119 struct file **filp); 120 __be32 nfsd_splice_read(struct svc_rqst *rqstp, struct svc_fh *fhp, 121 struct file *file, loff_t offset, 122 unsigned long *count, 123 u32 *eof); 124 __be32 nfsd_iter_read(struct svc_rqst *rqstp, struct svc_fh *fhp, 125 struct nfsd_file *nf, loff_t offset, 126 unsigned long *count, unsigned int base, 127 u32 *eof); 128 bool nfsd_read_splice_ok(struct svc_rqst *rqstp); 129 __be32 nfsd_read(struct svc_rqst *rqstp, struct svc_fh *fhp, 130 loff_t offset, unsigned long *count, 131 u32 *eof); 132 __be32 nfsd_write(struct svc_rqst *rqstp, struct svc_fh *fhp, 133 loff_t offset, const struct xdr_buf *payload, 134 unsigned long *cnt, int stable, __be32 *verf); 135 __be32 nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp, 136 struct nfsd_file *nf, loff_t offset, 137 const struct xdr_buf *payload, 138 unsigned long *cnt, int stable, __be32 *verf); 139 __be32 nfsd_readlink(struct svc_rqst *, struct svc_fh *, 140 char *, int *); 141 __be32 nfsd_symlink(struct svc_rqst *, struct svc_fh *, 142 char *name, int len, char *path, 143 struct nfsd_attrs *attrs, 144 struct svc_fh *res); 145 __be32 nfsd_link(struct svc_rqst *, struct svc_fh *, 146 char *, int, struct svc_fh *); 147 ssize_t nfsd_copy_file_range(struct file *, u64, 148 struct file *, u64, u64); 149 __be32 nfsd_rename(struct svc_rqst *, 150 struct svc_fh *, char *, int, 151 struct svc_fh *, char *, int); 152 __be32 nfsd_unlink(struct svc_rqst *, struct svc_fh *, int type, 153 char *name, int len); 154 __be32 nfsd_readdir(struct svc_rqst *, struct svc_fh *, 155 loff_t *, struct readdir_cd *, nfsd_filldir_t); 156 __be32 nfsd_statfs(struct svc_rqst *, struct svc_fh *, 157 struct kstatfs *, int access); 158 159 __be32 nfsd_permission(struct svc_cred *cred, struct svc_export *exp, 160 struct dentry *dentry, int acc); 161 162 void nfsd_filp_close(struct file *fp); 163 164 #endif /* LINUX_NFSD_VFS_H */ 165