/**************************************************************************** * fs/nfs/nfs_node.h * * Copyright (C) 2012 Gregory Nutt. All rights reserved. * Copyright (C) 2012 Jose Pablo Rojas Vargas. All rights reserved. * Author: Jose Pablo Rojas Vargas * * Leveraged from OpenBSD: * * Copyright (c) 1989, 1993 * The Regents of the University of California. All rights reserved. * * This code is derived from software contributed to Berkeley by * Rick Macklem at The University of Guelph. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * ****************************************************************************/ #ifndef __FS_NFS_NFS_NODE_H #define __FS_NFS_NFS_NODE_H /**************************************************************************** * Included Files ****************************************************************************/ #include "nfs_proto.h" /**************************************************************************** * Pre-processor Definitions ****************************************************************************/ /* Values for n_commitflags */ #define NFS_COMMIT_PUSH_VALID 0x0001 /* Push range valid */ #define NFS_COMMIT_PUSHED_VALID 0x0002 /* Pushed range valid */ #define n_atim n_un1.nf_atim #define n_mtim n_un2.nf_mtim #define n_cookieverf n_un1.nd_cookieverf #define n_direofoffset n_un2.nd_direof /* Flags for n_flag */ #define NFLUSHWANT 0x0001/* Want wakeup from a flush in prog. */ #define NFLUSHINPROG 0x0002/* Avoid multiple calls to vinvalbuf() */ #define NMODIFIED 0x0004/* Might have a modified buffer in bio */ #define NWRITEERR 0x0008/* Flag write errors so close will know */ #define NACC 0x0100/* Special file accessed */ #define NUPD 0x0200/* Special file updated */ #define NCHG 0x0400/* Special file times changed */ #define NFS_INVALIDATE_ATTRCACHE(np) ((np)->n_attrstamp = 0) /* Convert between nfsnode pointers and vnode pointers */ #define VTONFS(vp) ((struct nfsnode *)(vp)->f_priv) #define NFSTOV(np) ((np)->n_vnode) #define n_atim n_un1.nf_atim #define n_mtim n_un2.nf_mtim #define n_sillyrename n_un3.nf_silly #define n_cookieverf n_un1.nd_cookieverf #define n4_cookieverf n_un1.nd4_cookieverf #define n_direofoffset n_un2.nd_direof #define n_cookies n_un3.nd_cook /**************************************************************************** * Public Types ****************************************************************************/ /* The nfsnode is the nfs equivalent to ufs's inode. Any similarity * is purely coincidental. * There is a unique nfsnode allocated for each active file, * each current directory, each mounted-on file, text file, and the root. * An nfsnode is 'named' by its file handle. (nget/nfs_node.c) * If this structure exceeds 256 bytes (it is currently 256 using 4.4BSD-Lite * type definitions), file handles of > 32 bytes should probably be split out * into a separate malloc()'d data structure. (Reduce the size of nfsfh_t by * changing the definition in sys/mount.h of NFS_SMALLFH.) * NB: Hopefully the current order of the fields is such that everything will * be well aligned and, therefore, tightly packed. */ struct nfsnode { struct nfsnode *n_next; /* Retained in a singly linked list filehandle/node tree. */ bool n_open; /* true: The file is (still) open */ uint64_t n_size; /* Current size of file */ struct nfs_fattr n_fattr; /* nfs file attribute cache */ uint8_t nfsv3_type; /* File type */ time_t n_attrstamp; /* Attr. cache timestamp */ struct timespec n_mtime; /* Prev modify time. */ time_t n_ctime; /* Prev create time. */ nfsfh_t n_fhp; /* NFS File Handle */ uint32_t n_error; /* Save write error value */ union { struct timespec nf_atim; /* Special file times */ nfsuint64 nd_cookieverf; /* Cookie verifier (dir only) */ } n_un1; union { struct timespec nf_mtim; off_t nd_direof; /* Directory EOF offset cache */ } n_un2; uint32_t n_fhsize; /* size in bytes, of fh */ short n_flag; /* Flag for locking.. */ //nfsfh_t n_fh; /* Small File Handle */ time_t n_accstamp; /* Access cache timestamp */ uid_t n_accuid; /* Last access requester */ int n_accmode; /* Last mode requested */ int n_accerror; /* Last returned error */ //off_t n_pushedlo; /* 1st blk in commited range */ //off_t n_pushedhi; /* Last block in range */ //off_t n_pushlo; /* 1st block in commit range */ //off_t n_pushhi; /* Last block in range */ //struct rwlock n_commitlock; /* Serialize commits */ //int n_commitflags; }; /* This structure is used internally for describing the result of * walking a path */ struct nfs_dirinfo_s { /* These values describe the directory containing the terminal * path component (of the terminal component itself if it is * a directory. */ struct nfsdir_s n_dir; /* Describes directory. */ /* Values from the NFS file entry */ struct nfsnode attribute; }; #endif /* __FS_NFS_NFS_NODE_H */