/* * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de> */ #ifndef LINUX_NFSD_VFS_H #define LINUX_NFSD_VFS_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_LOCK 0x020 #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_CREATE (NFSD_MAY_EXEC|NFSD_MAY_WRITE) #define NFSD_MAY_REMOVE (NFSD_MAY_EXEC|NFSD_MAY_WRITE|NFSD_MAY_TRUNC) /* * Callback function for readdir */ typedef int (*nfsd_filldir_t)(void *, const char *, int, loff_t, u64, unsigned); /* nfsd/vfs.c */ int nfsd_racache_init(int); void nfsd_racache_shutdown(void); 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 iattr *, int, time_t); int nfsd_mountpoint(struct dentry *, struct svc_export *); #ifdef CONFIG_NFSD_V4 __be32 nfsd4_set_nfs4_label(struct svc_rqst *, struct svc_fh *, struct xdr_netobj *); __be32 nfsd4_vfs_fallocate(struct svc_rqst *, struct svc_fh *, struct file *, loff_t, loff_t, int); __be32 nfsd4_clone_file_range(struct file *, u64, struct file *, u64, u64); #endif /* CONFIG_NFSD_V4 */ __be32 nfsd_create_locked(struct svc_rqst *, struct svc_fh *, char *name, int len, struct iattr *attrs, int type, dev_t rdev, struct svc_fh *res); __be32 nfsd_create(struct svc_rqst *, struct svc_fh *, char *name, int len, struct iattr *attrs, int type, dev_t rdev, struct svc_fh *res); #ifdef CONFIG_NFSD_V3 __be32 nfsd_access(struct svc_rqst *, struct svc_fh *, u32 *, u32 *); __be32 do_nfsd_create(struct svc_rqst *, struct svc_fh *, char *name, int len, struct iattr *attrs, struct svc_fh *res, int createmode, u32 *verifier, bool *truncp, bool *created); __be32 nfsd_commit(struct svc_rqst *, struct svc_fh *, loff_t, unsigned long); #endif /* CONFIG_NFSD_V3 */ __be32 nfsd_open(struct svc_rqst *, struct svc_fh *, umode_t, int, struct file **); struct raparms; __be32 nfsd_splice_read(struct svc_rqst *, struct file *, loff_t, unsigned long *); __be32 nfsd_readv(struct file *, loff_t, struct kvec *, int, unsigned long *); __be32 nfsd_read(struct svc_rqst *, struct svc_fh *, loff_t, struct kvec *, int, unsigned long *); __be32 nfsd_write(struct svc_rqst *, struct svc_fh *, loff_t, struct kvec *, int, unsigned long *, int); __be32 nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file *file, loff_t offset, struct kvec *vec, int vlen, unsigned long *cnt, int stable); __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 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_rqst *, struct svc_export *, struct dentry *, int); struct raparms *nfsd_init_raparms(struct file *file); void nfsd_put_raparams(struct file *file, struct raparms *ra); static inline int fh_want_write(struct svc_fh *fh) { int 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(struct svc_fh *fh, struct kstat *stat) { struct path p = {.mnt = fh->fh_export->ex_path.mnt, .dentry = fh->fh_dentry}; return nfserrno(vfs_getattr(&p, stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT)); } static inline int nfsd_create_is_exclusive(int createmode) { return createmode == NFS3_CREATE_EXCLUSIVE || createmode == NFS4_CREATE_EXCLUSIVE4_1; } static inline bool nfsd_eof_on_read(long requested, long read, loff_t offset, loff_t size) { /* We assume a short read means eof: */ if (requested > read) return true; /* * A non-short read might also reach end of file. The spec * still requires us to set eof in that case. * * Further operations may have modified the file size since * the read, so the following check is not atomic with the read. * We've only seen that cause a problem for a client in the case * where the read returned a count of 0 without setting eof. * That case was fixed by the addition of the above check. */ return (offset + read >= size); } #endif /* LINUX_NFSD_VFS_H */