a0595d0249
locking flags when acquiring a vnode. The immediate purpose is to allow polling lock requests (LK_NOWAIT) needed by soft updates to avoid deadlock when enlisting other processes to help with the background cleanup. For the future it will allow the use of shared locks for read access to vnodes. This change touches a lot of files as it affects most filesystems within the system. It has been well tested on FFS, loopback, and CD-ROM filesystems. only lightly on the others, so if you find a problem there, please let me (mckusick@mckusick.com) know.
126 lines
5.0 KiB
C
126 lines
5.0 KiB
C
/*-
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* Copyright (c) 1994
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley
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* by Pace Willisson (pace@blitz.com). The Rock Ridge Extension
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* Support code is derived from software contributed to Berkeley
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* by Atsushi Murai (amurai@spec.co.jp).
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)cd9660_node.h 8.6 (Berkeley) 5/14/95
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* $FreeBSD$
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*/
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/*
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* Theoretically, directories can be more than 2Gb in length,
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* however, in practice this seems unlikely. So, we define
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* the type doff_t as a long to keep down the cost of doing
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* lookup on a 32-bit machine. If you are porting to a 64-bit
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* architecture, you should make doff_t the same as off_t.
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*/
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#define doff_t long
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typedef struct {
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struct timespec iso_atime; /* time of last access */
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struct timespec iso_mtime; /* time of last modification */
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struct timespec iso_ctime; /* time file changed */
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u_short iso_mode; /* files access mode and type */
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uid_t iso_uid; /* owner user id */
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gid_t iso_gid; /* owner group id */
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short iso_links; /* links of file */
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udev_t iso_rdev; /* Major/Minor number for special */
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} ISO_RRIP_INODE;
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struct iso_node {
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struct iso_node *i_next, **i_prev; /* hash chain */
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struct vnode *i_vnode; /* vnode associated with this inode */
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struct vnode *i_devvp; /* vnode for block I/O */
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u_long i_flag; /* see below */
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dev_t i_dev; /* device where inode resides */
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ino_t i_number; /* the identity of the inode */
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/* we use the actual starting block of the file */
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struct iso_mnt *i_mnt; /* filesystem associated with this inode */
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struct lockf *i_lockf; /* head of byte-level lock list */
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doff_t i_endoff; /* end of useful stuff in directory */
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doff_t i_diroff; /* offset in dir, where we found last entry */
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doff_t i_offset; /* offset of free space in directory */
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ino_t i_ino; /* inode number of found directory */
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long iso_extent; /* extent of file */
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long i_size;
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long iso_start; /* actual start of data of file (may be different */
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/* from iso_extent, if file has extended attributes) */
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ISO_RRIP_INODE inode;
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};
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#define i_forw i_chain[0]
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#define i_back i_chain[1]
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/* flags */
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#define IN_ACCESS 0x0020 /* inode access time to be updated */
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#define VTOI(vp) ((struct iso_node *)(vp)->v_data)
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#define ITOV(ip) ((ip)->i_vnode)
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#ifdef _KERNEL
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#ifdef MALLOC_DECLARE
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MALLOC_DECLARE(M_ISOFSMNT);
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MALLOC_DECLARE(M_ISOFSNODE);
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#endif
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struct buf;
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struct vop_bmap_args;
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struct vop_cachedlookup_args;
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struct vop_inactive_args;
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struct vop_reclaim_args;
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/*
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* Prototypes for ISOFS vnode operations
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*/
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int cd9660_lookup __P((struct vop_cachedlookup_args *));
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int cd9660_inactive __P((struct vop_inactive_args *));
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int cd9660_reclaim __P((struct vop_reclaim_args *));
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int cd9660_bmap __P((struct vop_bmap_args *));
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int cd9660_blkatoff __P((struct vnode *vp, off_t offset, char **res, struct buf **bpp));
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void cd9660_defattr __P((struct iso_directory_record *,
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struct iso_node *, struct buf *, enum ISO_FTYPE));
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void cd9660_deftstamp __P((struct iso_directory_record *,
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struct iso_node *, struct buf *, enum ISO_FTYPE));
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int cd9660_ihashget __P((dev_t, ino_t, int, struct vnode **));
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void cd9660_ihashins __P((struct iso_node *));
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int cd9660_tstamp_conv7 __P((u_char *, struct timespec *, enum ISO_FTYPE));
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int cd9660_tstamp_conv17 __P((u_char *, struct timespec *));
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#endif /* _KERNEL */
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