/* * 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. * * @(#)nfsnode.h 8.9 (Berkeley) 5/14/95 * $FreeBSD: /repoman/r/ncvs/src/sys/nfsclient/nfsnode.h,v 1.43 2004/04/14 23:23:55 peadar Exp $ * $DragonFly: src/sys/vfs/nfs/nfsnode.h,v 1.18 2006/05/06 16:01:21 dillon Exp $ */ #ifndef _NFS_NFSNODE_H_ #define _NFS_NFSNODE_H_ #if !defined(_NFS_NFS_H_) && !defined(_KERNEL) #include "nfs.h" #endif #include <sys/lockf.h> /* * Silly rename structure that hangs off the nfsnode until the name * can be removed by nfs_inactive() */ struct sillyrename { struct ucred *s_cred; struct vnode *s_dvp; long s_namlen; char s_name[20]; }; /* * Entries of directories in the buffer cache. */ struct nfs_dirent { ino_t nfs_ino; /* file number of entry */ uint16_t nfs_namlen; /* strlen(d_name) */ uint16_t nfs_reclen; /* total record length */ uint8_t nfs_type; /* file type */ uint8_t nfs_padding1; uint8_t nfs_padding2; uint8_t nfs_padding3; char nfs_name[]; /* name, NUL-terminated */ }; /* * This structure is used to save the logical directory offset to * NFS cookie mappings. * The mappings are stored in a list headed * by n_cookies, as required. * There is one mapping for each NFS_DIRBLKSIZ bytes of directory information * stored in increasing logical offset byte order. */ #define NFSNUMCOOKIES 31 struct nfsdmap { LIST_ENTRY(nfsdmap) ndm_list; int ndm_eocookie; nfsuint64 ndm_cookies[NFSNUMCOOKIES]; }; /* * 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) * * File handles are accessed via n_fhp, which will point to n_fh if the * file handle is small enough (<= NFS_SMALLFH). Otherwise the file handle * will be allocated. * * DragonFly does not pass ucreds to read and write operations, since such * operations are not possible unless the ucred has already been validated. * Validating ucreds are stored in nfsnode to pass on to NFS read/write RPCs. */ struct nfsnode { LIST_ENTRY(nfsnode) n_hash; /* Hash chain */ u_quad_t n_size; /* Current size of file */ u_quad_t n_brev; /* Modify rev when cached */ struct vattr n_vattr; /* Vnode attribute cache */ time_t n_attrstamp; /* Attr. cache timestamp */ u_int32_t n_mode; /* ACCESS mode cache */ uid_t n_modeuid; /* credentials having mode */ time_t n_modestamp; /* mode cache timestamp */ time_t n_mtime; /* Last known modified time */ time_t n_ctime; /* Prev create time. */ time_t n_expiry; /* Lease expiry time */ nfsfh_t *n_fhp; /* NFS File Handle */ struct ucred *n_rucred; struct ucred *n_wucred; struct vnode *n_vnode; /* associated vnode */ struct lockf n_lockf; /* Locking record of file */ int 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; /* Dir. EOF offset cache */ } n_un2; union { struct sillyrename *nf_silly; /* Ptr to silly rename struct */ LIST_HEAD(, nfsdmap) nd_cook; /* cookies */ } n_un3; short n_fhsize; /* size in bytes, of fh */ short n_flag; /* Flag for locking.. */ nfsfh_t n_fh; /* Small File Handle */ struct lock n_rslock; }; #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 n_direofoffset n_un2.nd_direof #define n_cookies n_un3.nd_cook /* * Flags for n_flag */ #define NFLUSHWANT 0x0001 /* Want wakeup from a flush in prog. */ #define NFLUSHINPROG 0x0002 /* Avoid multiple calls to vinvalbuf() */ #define NLMODIFIED 0x0004 /* Client has pending modifications */ #define NWRITEERR 0x0008 /* Flag write errors so close will know */ #define NREMOVED 0x0020 /* Flag possible removal of file */ #define NUNUSED040 0x0040 #define NQNFSEVICTED 0x0080 /* Has been evicted */ #define NACC 0x0100 /* Special file accessed */ #define NUPD 0x0200 /* Special file updated */ #define NCHG 0x0400 /* Special file times changed */ #define NLOCKED 0x0800 /* node is locked */ #define NWANTED 0x0100 /* someone wants to lock */ #define NRMODIFIED 0x2000 /* Server has unsynchronized modifications */ /* * Convert between nfsnode pointers and vnode pointers */ #define VTONFS(vp) ((struct nfsnode *)(vp)->v_data) #define NFSTOV(np) ((struct vnode *)(np)->n_vnode) /* * Queue head for nfsiod's */ extern TAILQ_HEAD(nfs_bufq, buf) nfs_bufq; #if defined(_KERNEL) /* * nfs_rslock - Attempt to obtain lock on nfsnode * * Attempt to obtain a lock on the passed nfsnode, returning ENOLCK * if the lock could not be obtained due to our having to sleep. This * function is generally used to lock around code that modifies an * NFS file's size. In order to avoid deadlocks the lock * should not be obtained while other locks are being held. */ static __inline int nfs_rslock(struct nfsnode *np) { return(lockmgr(&np->n_rslock, LK_EXCLUSIVE | LK_CANRECURSE | LK_SLEEPFAIL)); } static __inline void nfs_rsunlock(struct nfsnode *np) { lockmgr(&np->n_rslock, LK_RELEASE); } static __inline struct ucred * nfs_vpcred(struct vnode *vp, int ndflag) { struct nfsnode *np = VTONFS(vp); if (np && (ndflag & ND_WRITE) && np->n_wucred) return(np->n_wucred); if (np && (ndflag & ND_READ) && np->n_rucred) return(np->n_rucred); return(VFSTONFS((vp)->v_mount)->nm_cred); } /* * Prototypes for NFS vnode operations */ int nfs_write (struct vop_write_args *); int nfs_inactive (struct vop_inactive_args *); int nfs_reclaim (struct vop_reclaim_args *); int nfs_flush (struct vnode *, int, struct thread *, int); /* other stuff */ int nfs_removeit (struct sillyrename *); int nfs_nget (struct mount *, nfsfh_t *, int, struct nfsnode **, struct vnode *); int nfs_nget_nonblock (struct mount *, nfsfh_t *, int, struct nfsnode **, struct vnode *); nfsuint64 *nfs_getcookie (struct nfsnode *, off_t, int); void nfs_invaldir (struct vnode *); #endif /* _KERNEL */ #endif
