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Diffstat (limited to 'sys/nfs/nfsnode.h')
| -rw-r--r-- | sys/nfs/nfsnode.h | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/sys/nfs/nfsnode.h b/sys/nfs/nfsnode.h new file mode 100644 index 0000000..e654bc0 --- /dev/null +++ b/sys/nfs/nfsnode.h @@ -0,0 +1,210 @@ +/* + * 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. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. 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 + * $FreeBSD$ + */ + + +#ifndef _NFS_NFSNODE_H_ +#define _NFS_NFSNODE_H_ + +#if !defined(_NFS_NFS_H_) && !defined(KERNEL) +#include <nfs/nfs.h> +#endif + +/* + * 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]; +}; + +/* + * 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) + * 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 nfsproto.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 { + LIST_ENTRY(nfsnode) n_hash; /* Hash chain */ + CIRCLEQ_ENTRY(nfsnode) n_timer; /* Nqnfs timer chain */ + u_quad_t n_size; /* Current size of file */ + u_quad_t n_brev; /* Modify rev when cached */ + u_quad_t n_lrev; /* Modify rev for lease */ + 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; /* Prev modify time. */ + time_t n_ctime; /* Prev create time. */ + time_t n_expiry; /* Lease expiry time */ + nfsfh_t *n_fhp; /* NFS File Handle */ + 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 NMODIFIED 0x0004 /* Might have a modified buffer in bio */ +#define NWRITEERR 0x0008 /* Flag write errors so close will know */ +#define NQNFSNONCACHE 0x0020 /* Non-cachable lease */ +#define NQNFSWRITE 0x0040 /* Write lease */ +#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 */ + +/* + * 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; +extern struct proc *nfs_iodwant[NFS_MAXASYNCDAEMON]; +extern struct nfsmount *nfs_iodmount[NFS_MAXASYNCDAEMON]; + +#if defined(KERNEL) || 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, struct proc *p) +{ + return(lockmgr(&np->n_rslock, LK_EXCLUSIVE | LK_CANRECURSE | LK_SLEEPFAIL, NULL, p)); +} + +static __inline +void +nfs_rsunlock(struct nfsnode *np, struct proc *p) +{ + (void)lockmgr(&np->n_rslock, LK_RELEASE, NULL, p); +} + +extern vop_t **fifo_nfsv2nodeop_p; +extern vop_t **nfsv2_vnodeop_p; +extern vop_t **spec_nfsv2nodeop_p; + +/* + * Prototypes for NFS vnode operations + */ +int nfs_getpages __P((struct vop_getpages_args *)); +int nfs_putpages __P((struct vop_putpages_args *)); +int nfs_write __P((struct vop_write_args *)); +int nqnfs_vop_lease_check __P((struct vop_lease_args *)); +int nfs_inactive __P((struct vop_inactive_args *)); +int nfs_reclaim __P((struct vop_reclaim_args *)); + +/* other stuff */ +int nfs_removeit __P((struct sillyrename *)); +int nfs_nget __P((struct mount *,nfsfh_t *,int,struct nfsnode **)); +nfsuint64 *nfs_getcookie __P((struct nfsnode *, off_t, int)); +void nfs_invaldir __P((struct vnode *)); + +#define nqnfs_lease_updatetime nfs_lease_updatetime + +#endif /* KERNEL */ + +#endif |
