| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* |
| * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de> |
| */ |
| |
| #ifndef LINUX_NFSD_VFS_H |
| #define LINUX_NFSD_VFS_H |
| |
| #include <linux/fs.h> |
| #include <linux/posix_acl.h> |
| #include "nfsfh.h" |
| #include "nfsd.h" |
| |
| /* |
| * Flags for nfsd_permission |
| */ |
| #define NFSD_MAY_NOP 0 |
| #define NFSD_MAY_EXEC 0x001 /* == MAY_EXEC */ |
| #define NFSD_MAY_WRITE 0x002 /* == MAY_WRITE */ |
| #define NFSD_MAY_READ 0x004 /* == MAY_READ */ |
| #define NFSD_MAY_SATTR 0x008 |
| #define NFSD_MAY_TRUNC 0x010 |
| #define NFSD_MAY_NLM 0x020 /* request is from lockd */ |
| #define NFSD_MAY_MASK 0x03f |
| |
| /* extra hints to permission and open routines: */ |
| #define NFSD_MAY_OWNER_OVERRIDE 0x040 |
| #define NFSD_MAY_LOCAL_ACCESS 0x080 /* for device special files */ |
| #define NFSD_MAY_BYPASS_GSS_ON_ROOT 0x100 |
| #define NFSD_MAY_NOT_BREAK_LEASE 0x200 |
| #define NFSD_MAY_BYPASS_GSS 0x400 |
| #define NFSD_MAY_READ_IF_EXEC 0x800 |
| |
| #define NFSD_MAY_64BIT_COOKIE 0x1000 /* 64 bit readdir cookies for >= NFSv3 */ |
| |
| #define NFSD_MAY_LOCALIO 0x2000 /* for tracing, reflects when localio used */ |
| |
| #define NFSD_MAY_CREATE (NFSD_MAY_EXEC|NFSD_MAY_WRITE) |
| #define NFSD_MAY_REMOVE (NFSD_MAY_EXEC|NFSD_MAY_WRITE|NFSD_MAY_TRUNC) |
| |
| struct nfsd_file; |
| |
| /* |
| * Callback function for readdir |
| */ |
| typedef int (*nfsd_filldir_t)(void *, const char *, int, loff_t, u64, unsigned); |
| |
| /* nfsd/vfs.c */ |
| struct nfsd_attrs { |
| struct iattr *na_iattr; /* input */ |
| struct xdr_netobj *na_seclabel; /* input */ |
| struct posix_acl *na_pacl; /* input */ |
| struct posix_acl *na_dpacl; /* input */ |
| |
| int na_labelerr; /* output */ |
| int na_aclerr; /* output */ |
| }; |
| |
| static inline void nfsd_attrs_free(struct nfsd_attrs *attrs) |
| { |
| posix_acl_release(attrs->na_pacl); |
| posix_acl_release(attrs->na_dpacl); |
| } |
| |
| static inline bool nfsd_attrs_valid(struct nfsd_attrs *attrs) |
| { |
| struct iattr *iap = attrs->na_iattr; |
| |
| return (iap->ia_valid || (attrs->na_seclabel && |
| attrs->na_seclabel->len)); |
| } |
| |
| __be32 nfserrno (int errno); |
| int nfsd_cross_mnt(struct svc_rqst *rqstp, struct dentry **dpp, |
| struct svc_export **expp); |
| __be32 nfsd_lookup(struct svc_rqst *, struct svc_fh *, |
| const char *, unsigned int, struct svc_fh *); |
| __be32 nfsd_lookup_dentry(struct svc_rqst *, struct svc_fh *, |
| const char *, unsigned int, |
| struct svc_export **, struct dentry **); |
| __be32 nfsd_setattr(struct svc_rqst *, struct svc_fh *, |
| struct nfsd_attrs *, const struct timespec64 *); |
| int nfsd_mountpoint(struct dentry *, struct svc_export *); |
| #ifdef CONFIG_NFSD_V4 |
| __be32 nfsd4_vfs_fallocate(struct svc_rqst *, struct svc_fh *, |
| struct file *, loff_t, loff_t, int); |
| __be32 nfsd4_clone_file_range(struct svc_rqst *rqstp, |
| struct nfsd_file *nf_src, u64 src_pos, |
| struct nfsd_file *nf_dst, u64 dst_pos, |
| u64 count, bool sync); |
| #endif /* CONFIG_NFSD_V4 */ |
| __be32 nfsd_create_locked(struct svc_rqst *, struct svc_fh *, |
| struct nfsd_attrs *attrs, int type, dev_t rdev, |
| struct svc_fh *res); |
| __be32 nfsd_create(struct svc_rqst *, struct svc_fh *, |
| char *name, int len, struct nfsd_attrs *attrs, |
| int type, dev_t rdev, struct svc_fh *res); |
| __be32 nfsd_access(struct svc_rqst *, struct svc_fh *, u32 *, u32 *); |
| __be32 nfsd_create_setattr(struct svc_rqst *rqstp, struct svc_fh *fhp, |
| struct svc_fh *resfhp, struct nfsd_attrs *iap); |
| __be32 nfsd_commit(struct svc_rqst *rqst, struct svc_fh *fhp, |
| struct nfsd_file *nf, u64 offset, u32 count, |
| __be32 *verf); |
| #ifdef CONFIG_NFSD_V4 |
| __be32 nfsd_getxattr(struct svc_rqst *rqstp, struct svc_fh *fhp, |
| char *name, void **bufp, int *lenp); |
| __be32 nfsd_listxattr(struct svc_rqst *rqstp, struct svc_fh *fhp, |
| char **bufp, int *lenp); |
| __be32 nfsd_removexattr(struct svc_rqst *rqstp, struct svc_fh *fhp, |
| char *name); |
| __be32 nfsd_setxattr(struct svc_rqst *rqstp, struct svc_fh *fhp, |
| char *name, void *buf, u32 len, u32 flags); |
| #endif |
| int nfsd_open_break_lease(struct inode *, int); |
| __be32 nfsd_open(struct svc_rqst *, struct svc_fh *, umode_t, |
| int, struct file **); |
| int nfsd_open_verified(struct svc_fh *fhp, int may_flags, |
| struct file **filp); |
| __be32 nfsd_splice_read(struct svc_rqst *rqstp, struct svc_fh *fhp, |
| struct file *file, loff_t offset, |
| unsigned long *count, |
| u32 *eof); |
| __be32 nfsd_iter_read(struct svc_rqst *rqstp, struct svc_fh *fhp, |
| struct file *file, loff_t offset, |
| unsigned long *count, unsigned int base, |
| u32 *eof); |
| bool nfsd_read_splice_ok(struct svc_rqst *rqstp); |
| __be32 nfsd_read(struct svc_rqst *rqstp, struct svc_fh *fhp, |
| loff_t offset, unsigned long *count, |
| u32 *eof); |
| __be32 nfsd_write(struct svc_rqst *, struct svc_fh *, loff_t, |
| struct kvec *, int, unsigned long *, |
| int stable, __be32 *verf); |
| __be32 nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp, |
| struct nfsd_file *nf, loff_t offset, |
| struct kvec *vec, int vlen, unsigned long *cnt, |
| int stable, __be32 *verf); |
| __be32 nfsd_readlink(struct svc_rqst *, struct svc_fh *, |
| char *, int *); |
| __be32 nfsd_symlink(struct svc_rqst *, struct svc_fh *, |
| char *name, int len, char *path, |
| struct nfsd_attrs *attrs, |
| struct svc_fh *res); |
| __be32 nfsd_link(struct svc_rqst *, struct svc_fh *, |
| char *, int, struct svc_fh *); |
| ssize_t nfsd_copy_file_range(struct file *, u64, |
| struct file *, u64, u64); |
| __be32 nfsd_rename(struct svc_rqst *, |
| struct svc_fh *, char *, int, |
| struct svc_fh *, char *, int); |
| __be32 nfsd_unlink(struct svc_rqst *, struct svc_fh *, int type, |
| char *name, int len); |
| __be32 nfsd_readdir(struct svc_rqst *, struct svc_fh *, |
| loff_t *, struct readdir_cd *, nfsd_filldir_t); |
| __be32 nfsd_statfs(struct svc_rqst *, struct svc_fh *, |
| struct kstatfs *, int access); |
| |
| __be32 nfsd_permission(struct svc_cred *cred, struct svc_export *exp, |
| struct dentry *dentry, int acc); |
| |
| void nfsd_filp_close(struct file *fp); |
| |
| static inline int fh_want_write(struct svc_fh *fh) |
| { |
| int ret; |
| |
| if (fh->fh_want_write) |
| return 0; |
| ret = mnt_want_write(fh->fh_export->ex_path.mnt); |
| if (!ret) |
| fh->fh_want_write = true; |
| return ret; |
| } |
| |
| static inline void fh_drop_write(struct svc_fh *fh) |
| { |
| if (fh->fh_want_write) { |
| fh->fh_want_write = false; |
| mnt_drop_write(fh->fh_export->ex_path.mnt); |
| } |
| } |
| |
| static inline __be32 fh_getattr(const struct svc_fh *fh, struct kstat *stat) |
| { |
| u32 request_mask = STATX_BASIC_STATS; |
| struct path p = {.mnt = fh->fh_export->ex_path.mnt, |
| .dentry = fh->fh_dentry}; |
| |
| if (fh->fh_maxsize == NFS4_FHSIZE) |
| request_mask |= (STATX_BTIME | STATX_CHANGE_COOKIE); |
| |
| return nfserrno(vfs_getattr(&p, stat, request_mask, |
| AT_STATX_SYNC_AS_STAT)); |
| } |
| |
| #endif /* LINUX_NFSD_VFS_H */ |