Annotation of sys/nfs/nfsnode.h, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: nfsnode.h,v 1.26 2007/06/21 22:59:49 thib Exp $ */
! 2: /* $NetBSD: nfsnode.h,v 1.16 1996/02/18 11:54:04 fvdl Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1989, 1993
! 6: * The Regents of the University of California. All rights reserved.
! 7: *
! 8: * This code is derived from software contributed to Berkeley by
! 9: * Rick Macklem at The University of Guelph.
! 10: *
! 11: * Redistribution and use in source and binary forms, with or without
! 12: * modification, are permitted provided that the following conditions
! 13: * are met:
! 14: * 1. Redistributions of source code must retain the above copyright
! 15: * notice, this list of conditions and the following disclaimer.
! 16: * 2. Redistributions in binary form must reproduce the above copyright
! 17: * notice, this list of conditions and the following disclaimer in the
! 18: * documentation and/or other materials provided with the distribution.
! 19: * 3. Neither the name of the University nor the names of its contributors
! 20: * may be used to endorse or promote products derived from this software
! 21: * without specific prior written permission.
! 22: *
! 23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 33: * SUCH DAMAGE.
! 34: *
! 35: * @(#)nfsnode.h 8.9 (Berkeley) 5/14/95
! 36: */
! 37:
! 38:
! 39: #ifndef _NFS_NFSNODE_H_
! 40: #define _NFS_NFSNODE_H_
! 41:
! 42: #ifndef _NFS_NFS_H_
! 43: #include <nfs/nfs.h>
! 44: #endif
! 45:
! 46: #include <sys/rwlock.h>
! 47:
! 48: /*
! 49: * Silly rename structure that hangs off the nfsnode until the name
! 50: * can be removed by nfs_inactive()
! 51: */
! 52: struct sillyrename {
! 53: struct ucred *s_cred;
! 54: struct vnode *s_dvp;
! 55: long s_namlen;
! 56: char s_name[20];
! 57: };
! 58:
! 59: /*
! 60: * This structure is used to save the logical directory offset to
! 61: * NFS cookie mappings.
! 62: * The mappings are stored in a list headed
! 63: * by n_cookies, as required.
! 64: * There is one mapping for each NFS_DIRBLKSIZ bytes of directory information
! 65: * stored in increasing logical offset byte order.
! 66: */
! 67: #define NFSNUMCOOKIES 31
! 68:
! 69: struct nfsdmap {
! 70: LIST_ENTRY(nfsdmap) ndm_list;
! 71: int ndm_eocookie;
! 72: nfsuint64 ndm_cookies[NFSNUMCOOKIES];
! 73: };
! 74:
! 75: /*
! 76: * The nfsnode is the nfs equivalent to ufs's inode. Any similarity
! 77: * is purely coincidental.
! 78: * There is a unique nfsnode allocated for each active file,
! 79: * each current directory, each mounted-on file, text file, and the root.
! 80: * An nfsnode is 'named' by its file handle. (nget/nfs_node.c)
! 81: * If this structure exceeds 256 bytes (it is currently 256 using 4.4BSD-Lite
! 82: * type definitions), file handles of > 32 bytes should probably be split out
! 83: * into a separate MALLOC()'d data structure. (Reduce the size of nfsfh_t by
! 84: * changing the definition in sys/mount.h of NFS_SMALLFH.)
! 85: * NB: Hopefully the current order of the fields is such that everything will
! 86: * be well aligned and, therefore, tightly packed.
! 87: */
! 88: struct nfsnode {
! 89: LIST_ENTRY(nfsnode) n_hash; /* Hash chain */
! 90: u_quad_t n_size; /* Current size of file */
! 91: u_quad_t n_brev; /* Modify rev when cached */
! 92: u_quad_t n_lrev; /* Modify rev for lease */
! 93: struct vattr n_vattr; /* Vnode attribute cache */
! 94: time_t n_attrstamp; /* Attr. cache timestamp */
! 95: time_t n_mtime; /* Prev modify time. */
! 96: time_t n_ctime; /* Prev create time. */
! 97: time_t n_expiry; /* Lease expiry time */
! 98: nfsfh_t *n_fhp; /* NFS File Handle */
! 99: struct vnode *n_vnode; /* associated vnode */
! 100: struct lockf *n_lockf; /* Locking record of file */
! 101: int n_error; /* Save write error value */
! 102: union {
! 103: struct timespec nf_atim; /* Special file times */
! 104: nfsuint64 nd_cookieverf; /* Cookie verifier (dir only) */
! 105: } n_un1;
! 106: union {
! 107: struct timespec nf_mtim;
! 108: off_t nd_direof; /* Dir. EOF offset cache */
! 109: } n_un2;
! 110: union {
! 111: struct sillyrename *nf_silly; /* Ptr to silly rename struct */
! 112: LIST_HEAD(, nfsdmap) nd_cook; /* cookies */
! 113: } n_un3;
! 114: short n_fhsize; /* size in bytes, of fh */
! 115: short n_flag; /* Flag for locking.. */
! 116: nfsfh_t n_fh; /* Small File Handle */
! 117: struct ucred *n_rcred;
! 118: struct ucred *n_wcred;
! 119:
! 120: off_t n_pushedlo; /* 1st blk in commited range */
! 121: off_t n_pushedhi; /* Last block in range */
! 122: off_t n_pushlo; /* 1st block in commit range */
! 123: off_t n_pushhi; /* Last block in range */
! 124: struct rwlock n_commitlock; /* Serialize commits */
! 125: int n_commitflags;
! 126: };
! 127:
! 128: /*
! 129: * Values for n_commitflags
! 130: */
! 131: #define NFS_COMMIT_PUSH_VALID 0x0001 /* push range valid */
! 132: #define NFS_COMMIT_PUSHED_VALID 0x0002 /* pushed range valid */
! 133:
! 134: #define n_atim n_un1.nf_atim
! 135: #define n_mtim n_un2.nf_mtim
! 136: #define n_sillyrename n_un3.nf_silly
! 137: #define n_cookieverf n_un1.nd_cookieverf
! 138: #define n_direofoffset n_un2.nd_direof
! 139: #define n_cookies n_un3.nd_cook
! 140:
! 141: /*
! 142: * Flags for n_flag
! 143: */
! 144: #define NFLUSHWANT 0x0001 /* Want wakeup from a flush in prog. */
! 145: #define NFLUSHINPROG 0x0002 /* Avoid multiple calls to vinvalbuf() */
! 146: #define NMODIFIED 0x0004 /* Might have a modified buffer in bio */
! 147: #define NWRITEERR 0x0008 /* Flag write errors so close will know */
! 148: #define NACC 0x0100 /* Special file accessed */
! 149: #define NUPD 0x0200 /* Special file updated */
! 150: #define NCHG 0x0400 /* Special file times changed */
! 151:
! 152: /*
! 153: * Convert between nfsnode pointers and vnode pointers
! 154: */
! 155: #define VTONFS(vp) ((struct nfsnode *)(vp)->v_data)
! 156: #define NFSTOV(np) ((np)->n_vnode)
! 157:
! 158: /*
! 159: * Queue head for nfsiod's
! 160: */
! 161: extern TAILQ_HEAD(nfs_bufqhead, buf) nfs_bufq;
! 162:
! 163: #endif /* _NFS_NFSNODE_H_ */
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