7aca6291e3
As this code is not actually used by any of the existing
interfaces, it seems unlikely to break anything (famous
last words).
The internal kernel interface to manipulate these attributes
is invoked using two new IO_ flags: IO_NORMAL and IO_EXT.
These flags may be specified in the ioflags word of VOP_READ,
VOP_WRITE, and VOP_TRUNCATE. Specifying IO_NORMAL means that
you want to do I/O to the normal data part of the file and
IO_EXT means that you want to do I/O to the extended attributes
part of the file. IO_NORMAL and IO_EXT are mutually exclusive
for VOP_READ and VOP_WRITE, but may be specified individually
or together in the case of VOP_TRUNCATE. For example, when
removing a file, VOP_TRUNCATE is called with both IO_NORMAL
and IO_EXT set. For backward compatibility, if neither IO_NORMAL
nor IO_EXT is set, then IO_NORMAL is assumed.
Note that the BA_ and IO_ flags have been `merged' so that they
may both be used in the same flags word. This merger is possible
by assigning the IO_ flags to the low sixteen bits and the BA_
flags the high sixteen bits. This works because the high sixteen
bits of the IO_ word is reserved for read-ahead and help with
write clustering so will never be used for flags. This merge
lets us get away from code of the form:
if (ioflags & IO_SYNC)
flags |= BA_SYNC;
For the future, I have considered adding a new field to the
vattr structure, va_extsize. This addition could then be
exported through the stat structure to allow applications to
find out the size of the extended attribute storage and also
would provide a more standard interface for truncating them
(via VOP_SETATTR rather than VOP_TRUNCATE).
I am also contemplating adding a pathconf parameter (for
concreteness, lets call it _PC_MAX_EXTSIZE) which would
let an application determine the maximum size of the extended
atribute storage.
Sponsored by: DARPA & NAI Labs.
137 lines
6.1 KiB
C
137 lines
6.1 KiB
C
/*-
|
|
* Copyright (c) 1991, 1993, 1994
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* 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.
|
|
*
|
|
* @(#)ffs_extern.h 8.6 (Berkeley) 3/30/95
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef _UFS_FFS_EXTERN_H
|
|
#define _UFS_FFS_EXTERN_H
|
|
|
|
struct buf;
|
|
struct cg;
|
|
struct fid;
|
|
struct fs;
|
|
struct inode;
|
|
struct malloc_type;
|
|
struct mount;
|
|
struct thread;
|
|
struct sockaddr;
|
|
struct statfs;
|
|
struct ucred;
|
|
struct vnode;
|
|
struct vop_fsync_args;
|
|
struct vop_reallocblks_args;
|
|
struct vop_copyonwrite_args;
|
|
|
|
int ffs_alloc(struct inode *,
|
|
ufs2_daddr_t, ufs2_daddr_t, int, struct ucred *, ufs2_daddr_t *);
|
|
int ffs_balloc_ufs1(struct vnode *a_vp, off_t a_startoffset, int a_size,
|
|
struct ucred *a_cred, int a_flags, struct buf **a_bpp);
|
|
int ffs_balloc_ufs2(struct vnode *a_vp, off_t a_startoffset, int a_size,
|
|
struct ucred *a_cred, int a_flags, struct buf **a_bpp);
|
|
int ffs_blkatoff(struct vnode *, off_t, char **, struct buf **);
|
|
void ffs_blkfree(struct fs *, struct vnode *, ufs2_daddr_t, long, ino_t);
|
|
ufs2_daddr_t ffs_blkpref_ufs1(struct inode *, ufs_lbn_t, int, ufs1_daddr_t *);
|
|
ufs2_daddr_t ffs_blkpref_ufs2(struct inode *, ufs_lbn_t, int, ufs2_daddr_t *);
|
|
void ffs_clrblock(struct fs *, u_char *, ufs1_daddr_t);
|
|
void ffs_clusteracct (struct fs *, struct cg *, ufs1_daddr_t, int);
|
|
int ffs_fhtovp(struct mount *, struct fid *, struct vnode **);
|
|
int ffs_flushfiles(struct mount *, int, struct thread *);
|
|
void ffs_fragacct(struct fs *, int, int32_t [], int);
|
|
int ffs_freefile(struct fs *, struct vnode *, ino_t, int );
|
|
int ffs_isblock(struct fs *, u_char *, ufs1_daddr_t);
|
|
int ffs_isfreeblock(struct fs *, unsigned char *, ufs1_daddr_t);
|
|
void ffs_load_inode(struct buf *, struct inode *, struct malloc_type *,
|
|
struct fs *, ino_t);
|
|
int ffs_mountfs(struct vnode *, struct mount *, struct thread *,
|
|
struct malloc_type *);
|
|
int ffs_mountroot(void);
|
|
int ffs_mount(struct mount *, char *, caddr_t, struct nameidata *,
|
|
struct thread *);
|
|
int ffs_reallocblks(struct vop_reallocblks_args *);
|
|
int ffs_realloccg(struct inode *, ufs2_daddr_t, ufs2_daddr_t,
|
|
ufs2_daddr_t, int, int, struct ucred *, struct buf **);
|
|
void ffs_setblock(struct fs *, u_char *, ufs1_daddr_t);
|
|
int ffs_snapblkfree(struct fs *, struct vnode *, ufs2_daddr_t, long, ino_t);
|
|
void ffs_snapremove(struct vnode *vp);
|
|
int ffs_snapshot(struct mount *mp, char *snapfile);
|
|
void ffs_snapshot_mount(struct mount *mp);
|
|
void ffs_snapshot_unmount(struct mount *mp);
|
|
int ffs_statfs(struct mount *, struct statfs *, struct thread *);
|
|
int ffs_sync(struct mount *, int, struct ucred *, struct thread *);
|
|
int ffs_truncate(struct vnode *, off_t, int, struct ucred *, struct thread *);
|
|
int ffs_unmount(struct mount *, int, struct thread *);
|
|
int ffs_update(struct vnode *, int);
|
|
int ffs_valloc(struct vnode *, int, struct ucred *, struct vnode **);
|
|
|
|
int ffs_vfree(struct vnode *, ino_t, int);
|
|
int ffs_vget(struct mount *, ino_t, int, struct vnode **);
|
|
int ffs_vptofh(struct vnode *, struct fid *);
|
|
|
|
extern vop_t **ffs_vnodeop_p;
|
|
extern vop_t **ffs_specop_p;
|
|
extern vop_t **ffs_fifoop_p;
|
|
|
|
/*
|
|
* Soft update function prototypes.
|
|
*/
|
|
void softdep_initialize(void);
|
|
void softdep_uninitialize(void);
|
|
int softdep_mount(struct vnode *, struct mount *, struct fs *,
|
|
struct ucred *);
|
|
int softdep_flushworklist(struct mount *, int *, struct thread *);
|
|
int softdep_flushfiles(struct mount *, int, struct thread *);
|
|
void softdep_update_inodeblock(struct inode *, struct buf *, int);
|
|
void softdep_load_inodeblock(struct inode *);
|
|
void softdep_freefile(struct vnode *, ino_t, int);
|
|
int softdep_request_cleanup(struct fs *, struct vnode *);
|
|
void softdep_setup_freeblocks(struct inode *, off_t, int);
|
|
void softdep_setup_inomapdep(struct buf *, struct inode *, ino_t);
|
|
void softdep_setup_blkmapdep(struct buf *, struct fs *, ufs2_daddr_t);
|
|
void softdep_setup_allocdirect(struct inode *, ufs_lbn_t, ufs2_daddr_t,
|
|
ufs2_daddr_t, long, long, struct buf *);
|
|
void softdep_setup_allocext(struct inode *, ufs_lbn_t, ufs2_daddr_t,
|
|
ufs2_daddr_t, long, long, struct buf *);
|
|
void softdep_setup_allocindir_meta(struct buf *, struct inode *,
|
|
struct buf *, int, ufs2_daddr_t);
|
|
void softdep_setup_allocindir_page(struct inode *, ufs_lbn_t,
|
|
struct buf *, int, ufs2_daddr_t, ufs2_daddr_t, struct buf *);
|
|
void softdep_fsync_mountdev(struct vnode *);
|
|
int softdep_sync_metadata(struct vop_fsync_args *);
|
|
/* XXX incorrectly moved to mount.h - should be indirect function */
|
|
#if 0
|
|
int softdep_fsync(struct vnode *vp);
|
|
#endif
|
|
|
|
#endif /* !_UFS_FFS_EXTERN_H */
|