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author | Chris Johns <chrisj@rtems.org> | 2021-07-29 13:35:16 +1000 |
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committer | Chris Johns <chrisj@rtems.org> | 2021-08-28 10:25:46 +1000 |
commit | 6138f242be4f9d989a4052be71f1b116bd806e44 (patch) | |
tree | 3f6e5d1b280a1dd2bbd0916f334c76da2705ca20 /freebsd/sys/fs/nfsclient/nfsnode.h | |
parent | kern/sys: Add the kernel RPC and XDR support (diff) | |
download | rtems-libbsd-6138f242be4f9d989a4052be71f1b116bd806e44.tar.bz2 |
kern/sys: Import NFS and NFS file system client
Update #4475
Diffstat (limited to 'freebsd/sys/fs/nfsclient/nfsnode.h')
-rw-r--r-- | freebsd/sys/fs/nfsclient/nfsnode.h | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/freebsd/sys/fs/nfsclient/nfsnode.h b/freebsd/sys/fs/nfsclient/nfsnode.h new file mode 100644 index 00000000..66a2de31 --- /dev/null +++ b/freebsd/sys/fs/nfsclient/nfsnode.h @@ -0,0 +1,199 @@ +/*- + * SPDX-License-Identifier: BSD-3-Clause + * + * 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. + * + * $FreeBSD$ + */ + +#ifndef _NFSCLIENT_NFSNODE_H_ +#define _NFSCLIENT_NFSNODE_H_ + +#include <sys/_task.h> + +/* + * Silly rename structure that hangs off the nfsnode until the name + * can be removed by nfs_inactive() + */ +struct sillyrename { + struct task s_task; + struct ucred *s_cred; + struct vnode *s_dvp; + long s_namlen; + char s_name[32]; +}; + +/* + * 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; + union { + nfsuint64 ndmu3_cookies[NFSNUMCOOKIES]; + uint64_t ndmu4_cookies[NFSNUMCOOKIES]; + } ndm_un1; +}; + +#define ndm_cookies ndm_un1.ndmu3_cookies +#define ndm4_cookies ndm_un1.ndmu4_cookies + +struct nfs_accesscache { + u_int32_t mode; /* ACCESS mode cache */ + uid_t uid; /* credentials having mode */ + time_t stamp; /* mode cache timestamp */ +}; + +/* + * 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 { + struct mtx n_mtx; /* Protects all of these members */ + struct lock n_excl; /* Exclusive helper for shared + vnode lock */ + 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 nfsvattr n_vattr; /* Vnode attribute cache */ + time_t n_attrstamp; /* Attr. cache timestamp */ + struct nfs_accesscache n_accesscache[NFS_ACCESSCACHESIZE]; + struct timespec n_mtime; /* Prev modify time. */ + struct nfsfh *n_fhp; /* NFS File Handle */ + struct vnode *n_vnode; /* associated vnode */ + struct vnode *n_dvp; /* parent 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) */ + u_char nd4_cookieverf[NFSX_VERF]; + } 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 */ + u_int32_t n_flag; /* Flag for locking.. */ + int n_directio_opens; + int n_directio_asyncwr; + u_int64_t n_change; /* old Change attribute */ + struct nfsv4node *n_v4; /* extra V4 stuff */ + struct ucred *n_writecred; /* Cred. for putpages */ +}; + +#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 + +/* + * Flags for n_flag + */ +#define NDIRCOOKIELK 0x00000001 /* Lock to serialize access to directory cookies */ +#define NFSYNCWAIT 0x00000002 /* fsync waiting for all directio async + writes to drain */ +#define NMODIFIED 0x00000004 /* Might have a modified buffer in bio */ +#define NWRITEERR 0x00000008 /* Flag write errors so close will know */ +#define NCREATED 0x00000010 /* Opened by nfs_create() */ +#define NTRUNCATE 0x00000020 /* Opened by nfs_setattr() */ +#define NSIZECHANGED 0x00000040 /* File size has changed: need cache inval */ +#define NNONCACHE 0x00000080 /* Node marked as noncacheable */ +#define NACC 0x00000100 /* Special file accessed */ +#define NUPD 0x00000200 /* Special file updated */ +#define NCHG 0x00000400 /* Special file times changed */ +#define NDELEGMOD 0x00000800 /* Modified delegation */ +#define NDELEGRECALL 0x00001000 /* Recall in progress */ +#define NREMOVEINPROG 0x00002000 /* Remove in progress */ +#define NREMOVEWANT 0x00004000 /* Want notification that remove is done */ +#define NLOCK 0x00008000 /* Sleep lock the node */ +#define NLOCKWANT 0x00010000 /* Want the sleep lock */ +#define NNOLAYOUT 0x00020000 /* Can't get a layout for this file */ +#define NWRITEOPENED 0x00040000 /* Has been opened for writing */ +#define NHASBEENLOCKED 0x00080000 /* Has been file locked. */ +#define NDSCOMMIT 0x00100000 /* Commit is done via the DS. */ +#define NVNSETSZSKIP 0x00200000 /* Skipped vnode_pager_setsize() */ + +/* + * Convert between nfsnode pointers and vnode pointers + */ +#define VTONFS(vp) ((struct nfsnode *)(vp)->v_data) +#define NFSTOV(np) ((struct vnode *)(np)->n_vnode) + +#define NFS_TIMESPEC_COMPARE(T1, T2) (((T1)->tv_sec != (T2)->tv_sec) || ((T1)->tv_nsec != (T2)->tv_nsec)) + +#if defined(_KERNEL) + +/* + * Prototypes for NFS vnode operations + */ +int ncl_getpages(struct vop_getpages_args *); +int ncl_putpages(struct vop_putpages_args *); +int ncl_write(struct vop_write_args *); +int ncl_inactive(struct vop_inactive_args *); +int ncl_reclaim(struct vop_reclaim_args *); + +/* other stuff */ +int ncl_removeit(struct sillyrename *, struct vnode *); +int ncl_nget(struct mount *, u_int8_t *, int, struct nfsnode **, int); +nfsuint64 *ncl_getcookie(struct nfsnode *, off_t, int); +void ncl_invaldir(struct vnode *); +bool ncl_excl_start(struct vnode *); +void ncl_excl_finish(struct vnode *, bool old_lock); +void ncl_dircookie_lock(struct nfsnode *); +void ncl_dircookie_unlock(struct nfsnode *); + +#endif /* _KERNEL */ + +#endif /* _NFSCLIENT_NFSNODE_H_ */ |