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_dpaclerr; /* output */ 57 int na_paclerr; /* output */ 58 }; 59 60 static inline void nfsd_attrs_free(struct nfsd_attrs *attrs) 61 { 62 posix_acl_release(attrs->na_pacl); 63 posix_acl_release(attrs->na_dpacl); 64 } 65 66 static inline bool nfsd_attrs_valid(struct nfsd_attrs *attrs) 67 { 68 struct iattr *iap = attrs->na_iattr; 69 70 return (iap->ia_valid || (attrs->na_seclabel && 71 attrs->na_seclabel->len) || 72 attrs->na_pacl || attrs->na_dpacl); 73 } 74 75 __be32 nfserrno (int errno); 76 int nfsd_cross_mnt(struct svc_rqst *rqstp, struct dentry **dpp, 77 struct svc_export **expp); 78 __be32 nfsd_lookup(struct svc_rqst *, struct svc_fh *, 79 const char *, unsigned int, struct svc_fh *); 80 __be32 nfsd_lookup_dentry(struct svc_rqst *, struct svc_fh *, 81 const char *, unsigned int, 82 struct svc_export **, struct dentry **); 83 __be32 nfsd_setattr(struct svc_rqst *, struct svc_fh *, 84 struct nfsd_attrs *, const struct timespec64 *); 85 int nfsd_mountpoint(struct dentry *, struct svc_export *); 86 #ifdef CONFIG_NFSD_V4 87 __be32 nfsd4_vfs_fallocate(struct svc_rqst *, struct svc_fh *, 88 struct file *, loff_t, loff_t, int); 89 __be32 nfsd4_clone_file_range(struct svc_rqst *rqstp, 90 struct nfsd_file *nf_src, u64 src_pos, 91 struct nfsd_file *nf_dst, u64 dst_pos, 92 u64 count, bool sync); 93 #endif /* CONFIG_NFSD_V4 */ 94 __be32 nfsd_create_locked(struct svc_rqst *, struct svc_fh *, 95 struct nfsd_attrs *attrs, int type, dev_t rdev, 96 struct svc_fh *res); 97 __be32 nfsd_create(struct svc_rqst *, struct svc_fh *, 98 char *name, int len, struct nfsd_attrs *attrs, 99 int type, dev_t rdev, struct svc_fh *res); 100 __be32 nfsd_access(struct svc_rqst *, struct svc_fh *, u32 *, u32 *); 101 __be32 nfsd_create_setattr(struct svc_rqst *rqstp, struct svc_fh *fhp, 102 struct svc_fh *resfhp, struct nfsd_attrs *iap); 103 __be32 nfsd_commit(struct svc_rqst *rqst, struct svc_fh *fhp, 104 struct nfsd_file *nf, u64 offset, u32 count, 105 __be32 *verf); 106 #ifdef CONFIG_NFSD_V4 107 __be32 nfsd_getxattr(struct svc_rqst *rqstp, struct svc_fh *fhp, 108 char *name, void **bufp, int *lenp); 109 __be32 nfsd_listxattr(struct svc_rqst *rqstp, struct svc_fh *fhp, 110 char **bufp, int *lenp); 111 __be32 nfsd_removexattr(struct svc_rqst *rqstp, struct svc_fh *fhp, 112 char *name); 113 __be32 nfsd_setxattr(struct svc_rqst *rqstp, struct svc_fh *fhp, 114 char *name, void *buf, u32 len, u32 flags); 115 #endif 116 int nfsd_open_break_lease(struct inode *, int); 117 __be32 nfsd_open(struct svc_rqst *, struct svc_fh *, umode_t, 118 int, struct file **); 119 int nfsd_open_verified(struct svc_fh *fhp, umode_t type, int may_flags, 120 struct file **filp); 121 __be32 nfsd_splice_read(struct svc_rqst *rqstp, struct svc_fh *fhp, 122 struct file *file, loff_t offset, 123 unsigned long *count, 124 u32 *eof); 125 __be32 nfsd_iter_read(struct svc_rqst *rqstp, struct svc_fh *fhp, 126 struct nfsd_file *nf, loff_t offset, 127 unsigned long *count, unsigned int base, 128 u32 *eof); 129 bool nfsd_read_splice_ok(struct svc_rqst *rqstp); 130 __be32 nfsd_read(struct svc_rqst *rqstp, struct svc_fh *fhp, 131 loff_t offset, unsigned long *count, 132 u32 *eof); 133 __be32 nfsd_write(struct svc_rqst *rqstp, struct svc_fh *fhp, 134 loff_t offset, const struct xdr_buf *payload, 135 unsigned long *cnt, int stable, __be32 *verf); 136 __be32 nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp, 137 struct nfsd_file *nf, loff_t offset, 138 const struct xdr_buf *payload, 139 unsigned long *cnt, int stable, __be32 *verf); 140 __be32 nfsd_readlink(struct svc_rqst *, struct svc_fh *, 141 char *, int *); 142 __be32 nfsd_symlink(struct svc_rqst *, struct svc_fh *, 143 char *name, int len, char *path, 144 struct nfsd_attrs *attrs, 145 struct svc_fh *res); 146 __be32 nfsd_link(struct svc_rqst *, struct svc_fh *, 147 char *, int, struct svc_fh *); 148 ssize_t nfsd_copy_file_range(struct file *, u64, 149 struct file *, u64, u64); 150 __be32 nfsd_rename(struct svc_rqst *, 151 struct svc_fh *, char *, int, 152 struct svc_fh *, char *, int); 153 __be32 nfsd_unlink(struct svc_rqst *, struct svc_fh *, int type, 154 char *name, int len); 155 __be32 nfsd_readdir(struct svc_rqst *, struct svc_fh *, 156 loff_t *, struct readdir_cd *, nfsd_filldir_t); 157 __be32 nfsd_statfs(struct svc_rqst *, struct svc_fh *, 158 struct kstatfs *, int access); 159 160 __be32 nfsd_permission(struct svc_cred *cred, struct svc_export *exp, 161 struct dentry *dentry, int acc); 162 163 void nfsd_filp_close(struct file *fp); 164 165 #endif /* LINUX_NFSD_VFS_H */ 166